operating mechanism

Abstract

The application relates to an operating mechanism comprising an operating member configured to be movable in a first direction between a to-be-operated position and an operated position, and a retaining member configured to be movable in a second direction between a retaining position and a releasing position. The first direction intersects the second direction, and when the retaining member is in the retaining position, the operating member abuts against the retaining member in the first direction, and the retaining member blocks the operating member from moving from the operated position to the to-be-operated position. The operating mechanism can maintain the operating mechanism in the operated position without the user continuously exerting an external force.

Description

Technical Field

[0001] This application relates to the field of trolley technology, and in particular to an operating mechanism and a trolley having the operating mechanism. Background Technology

[0002] To facilitate steering, especially in confined spaces, strollers, camping trailers, shopping carts, and similar items are typically equipped with wheel steering mechanisms to selectively lock or unlock the wheels. Generally, continuous external force is required to maintain the mechanism's position and keep the wheels unlocked. Buttons on such mechanisms cannot maintain the wheel steering unlock without continuous external force. Summary of the Invention

[0003] Therefore, it is necessary to provide an operating mechanism and a trolley having the operating mechanism to address the above problems. The operating mechanism can maintain the operating component in the operating position without the user having to continuously apply external force.

[0004] According to one aspect of this application, an operating mechanism is provided, comprising: an operating member configured to be movable along a first direction between an operating position and an operating position; and a retaining member configured to be movable along a second direction between a retaining position and a release position. The first direction intersects the second direction, and when the retaining member is in the retaining position, the operating member abuts against the retaining member in the first direction, and the retaining member prevents the operating member from moving from the operating position to the operating position.

[0005] In one embodiment, the operating member includes a through hole, and the retaining member includes an engaging portion. When the retaining member is in the retaining position, the engaging portion is received in the through hole, the wall of the through hole abuts against the engaging portion in a first direction, and the engaging portion prevents the operating member from moving from the operating position to the waiting operating position.

[0006] In one embodiment, the retainer further includes a limiting portion located on one side of the engaging portion in a second direction and protruding from the engaging portion in a first direction. When the retainer is in the retaining position, the limiting portion abuts against the operating member.

[0007] In one embodiment, the operating member is provided with a receiving groove, and the limiting part is received in the receiving groove. When the retaining member moves in a second direction, the limiting part moves in the receiving groove in the second direction. The receiving groove has a first groove wall, and a through hole is provided in the first groove wall. When the retaining member is in the holding position, the limiting part abuts against the first groove wall.

[0008] In one embodiment, the receiving groove is further formed with a second groove wall, the second groove wall and the first groove wall being opposite each other in a second direction, and the limiting portion abutting against the second groove wall when the retainer is in the released position.

[0009] In one embodiment, the operating member is provided with a sliding hole disposed in the first groove wall. In a first direction, the first end of the sliding hole communicates with a through hole, and the retaining member is provided with a transition portion. In a second direction, the transition portion and the limiting portion are respectively located on opposite sides of the engaging portion. When the operating member moves in the first direction, the transition portion is accommodated in the sliding hole.

[0010] In one embodiment, the operating mechanism further includes an elastic element that abuts against the retainer and applies an elastic force to the retainer, causing the retainer to tend to move toward the retaining position.

[0011] In one embodiment, the receiving groove is provided with a clearance hole that extends along a first direction, and the retainer is also provided with a guide portion that is located on the side of the limiting portion away from the engaging portion. The guide portion and the clearance hole are movable relative to each other in the first direction.

[0012] In one embodiment, the retainer is provided with a mounting groove extending along a second direction, an abutment surface is formed within the mounting groove, the elastic member is at least partially accommodated in the mounting groove, and the elastic member abuts against the abutment surface.

[0013] In one embodiment, a guide groove is provided in the receiving groove, the guide groove extends along a first direction, and a limiting part is engaged in the guide groove. The movement of the limiting part along the first direction in the guide groove guides the movement of the operating member in the first direction.

[0014] In one embodiment, the operating mechanism further includes: a housing having an operating hole and a hollow mounting cavity, the operating hole communicating with the mounting cavity, an operating element being movably disposed in the operating hole, and the operating element protruding at least partially from the operating hole.

[0015] According to another aspect of this application, a trolley is provided, comprising: a first element; a second element selectively movably or fixedly connected to the first element; an operating mechanism according to the foregoing embodiment, the operating mechanism being disposed on the first element; a locking member connected to the operating member, the locking member being movable between a locked position and an unlocked position, wherein when the locking member is in the locked position, the locking member engages with the first element and the second element, the first element and the second element being fixedly connected; and when the locking member is in the unlocked position, the locking member releases engagement with at least one of the first element and the second element, the first element and the second element being movably connected; and a reset member driving the locking member from the unlocked position to the locked position, and driving the operating member from the operating position to the ready-to-operate position. When the holding member is in the holding position, the locking member is in the unlocked position; when the operating member is in the ready-to-operate position, the locking member is in the locked position; and movement of the operating member from the ready-to-operate position to the operating position drives the locking member to move from the locked position to the unlocked position.

[0016] In one embodiment, the trolley further includes: a drive member operably connected to an operating member; and a traction member connecting the drive member to a locking member. Movement of the operating member from a pending position to an operating position drives the drive member to pivot, thereby driving the locking member from a locked position to an unlocked position via the traction member.

[0017] In one embodiment, the operating member is provided with a driving part, the driving part is provided with a sliding groove, and the driving member is provided with a connecting part. The sliding groove is fitted with the connecting part, and the connecting part is configured to be pivotable in the sliding groove and slidable along the sliding groove.

[0018] In one embodiment, the first element is the frame and the second element is the wheel seat.

[0019] According to another aspect of this application, an operating mechanism is provided, comprising: an operating member configured to move along a first direction between an operating position and an operating position; and a retaining member configured to move along a second direction between a retaining position and a release position, wherein the first direction intersects the second direction, and when the retaining member is in the retaining position, the operating member abuts against the retaining member in the first direction, and the retaining member prevents the operating member from moving from the operating position to the operating position, and when the retaining member is in the release position, the operating member can move between the operating position and the operating position.

[0020] In one embodiment, the operating member includes a receiving portion, and the retaining member includes an engaging portion. When the retaining member is in a holding position, the engaging portion is received in the receiving portion, and the engaging portion abuts against the receiving portion in a first direction to prevent the operating member from moving from the operating position to the waiting position. When the retaining member is in a releasing position, the engaging portion disengages from the receiving portion.

[0021] In one embodiment, the receiving portion includes a through hole. When the retainer is in the retaining position, the engaging portion is received in the through hole, and the wall of the through hole abuts against the engaging portion in a first direction. When the retainer is in the releasing position, the engaging portion disengages from the through hole. The retainer further includes a limiting portion located on one side of the engaging portion in a second direction and protruding from the engaging portion on a plane intersecting the second direction. When the retainer is in the retaining position, the limiting portion abuts against the operating member in the second direction.

[0022] In one embodiment, the operating member is provided with a receiving groove, and the limiting part is received in the receiving groove. When the retaining member moves in the second direction, the limiting part is in the receiving groove and moves in the second direction. The receiving groove is formed with a first groove wall and a second groove wall. The second groove wall and the first groove wall are opposite to each other in the second direction. A through hole is provided in the first groove wall. When the retaining member is in the holding position, the limiting part abuts against the first groove wall in the second direction.

[0023] In one embodiment, when the retainer is in the released position, the limiting portion abuts against the second groove wall in the second direction.

[0024] In one embodiment, a clearance hole is provided on the second groove wall, the clearance hole extending along a first direction, and the operating mechanism further includes an elastic member that abuts against the retainer, the elastic member driving the engaging portion to be received in the through hole; wherein when the operating member moves in the first direction, the elastic member and / or the retainer are located in the clearance hole.

[0025] In one embodiment, the operating member is provided with a sliding hole extending along a first direction, in which the sliding hole communicates with a through hole. The retaining member is provided with a transition portion, wherein, in a second direction, the transition portion and the limiting portion are located on opposite sides of the engaging portion, and when the operating member moves in the first direction, the transition portion is accommodated in the sliding hole.

[0026] In one embodiment, two guide ribs are provided in the receiving groove at intervals. Each guide rib is connected to at least one of the first groove wall and the second groove wall and extends along a first direction. A limiting part is located between the two guide ribs and guides the movement of the operating member in the first direction.

[0027] In one embodiment, the receiving portion includes a groove, and when the retainer is in the retaining position, the engaging portion is received in the groove, the groove wall abuts against the engaging portion in a first direction, and the engaging portion abuts against the groove bottom in a second direction, and when the retainer is in the releasing position, the engaging portion disengages from the groove.

[0028] In one embodiment, the receiving portion includes a groove, and when the retainer is in the retaining position, the engaging portion is received in the groove, the same groove wall of the groove abuts against the engaging portion in a first direction and a second direction, and when the retainer is in the releasing position, the engaging portion disengages from the groove.

[0029] In one embodiment, the operating member is further provided with a receiving groove. When the operating member is in the waiting position, the engaging part is accommodated in the receiving groove. The groove wall of the receiving groove is provided with a first guide slope, and the engaging part is provided with a second guide slope that cooperates with the first guide slope. Both the first guide slope and the second guide slope are inclined to the first direction and the second direction, respectively. When the operating member moves from the waiting position to the operating position, the first guide slope is adapted to push against the second guide slope to drive the retaining member to move to the release position.

[0030] In one embodiment, the housing, the operating member, and the retainer are movable relative to the housing between an operating position and an operating position; the retainer is movable relative to the housing between a retaining position and a releasing position.

[0031] In one embodiment, the operating element is slidably connected to the housing; the retaining element is slidably or pivotally connected to the housing.

[0032] In one embodiment, the housing is provided with an operating hole, in which an operating member moves along a first direction between an operating position and an operating position; the housing is provided with a retaining hole, in which a retaining member moves along a second direction between a retaining position and a releasing position.

[0033] In one embodiment, the retainer further includes an unlocking portion located on one side of the engaging portion in a second direction. The unlocking portion slides in the retaining hole in the second direction, and when the retainer is in the retaining position, the unlocking portion protrudes out of the retaining hole.

[0034] In one embodiment, the retainer further includes an unlocking portion and a transition portion. The transition portion is located between the unlocking portion and the engaging portion in a third direction, and the third direction intersects with the first direction and the second direction. The transition portion is located in the retaining hole and slides along the second direction in the retaining hole. The unlocking portion protrudes from the housing.

[0035] In one embodiment, a first guide protrusion is provided on one of the housing and the operating member, and a second guide protrusion is provided on the other of the housing and the operating member. At least one of the first guide protrusion and the second guide protrusion extends along a first direction, and the cooperation between the first guide protrusion and the second guide protrusion guides the sliding of the operating member in the first direction.

[0036] In one embodiment, an elastic element is located between the housing and the retainer, and the elastic element drives the retainer to move toward a retaining position.

[0037] In one embodiment, the retainer is pivotally connected to the housing, the housing having an abutment portion, the elastic member being connected to the retainer and pivoting with the retainer, the abutment portion abutting against the elastic member and restricting the elastic member from pivoting with the retainer toward a release position.

[0038] In one embodiment, the retainer is provided with a mounting groove extending along a second direction, and an abutment surface is formed within the mounting groove. The operating mechanism also includes an elastic element that is at least partially accommodated in the mounting groove and abuts against the abutment surface, thereby causing the retainer to move toward a retaining position.

[0039] In one embodiment, the housing and the operating member move relative to the housing between an operating position and an operating position; the retainer moves relative to the housing between a retaining position and a releasing position; the retainer is movably connected to the operating member and moves with the operating member relative to the housing; when the retainer is in the retaining position, the retainer abuts against both the housing and the operating member in a first direction to prevent the operating member from moving from the operating position to the operating position; when the retainer is in the releasing position, the retainer does not abut against the housing in the first direction.

[0040] In one embodiment, the housing includes a groove, and the operating member is provided with a first groove; when the retainer is in the retaining position, the retainer is accommodated in the groove and the first groove in a second direction, and the retainer abuts against the groove wall of the groove and the groove wall of the first groove in a first direction; when the retainer is in the releasing position, the retainer disengages from the groove.

[0041] In one embodiment, the housing includes a receiving groove. When the operating member is in the operating position, the retaining member is accommodated in the receiving groove and the operating member. The groove wall of the receiving groove is provided with a first guide slope, and the retaining member is provided with a second guide slope that cooperates with the first guide slope. Both the first guide slope and the second guide slope intersect with the first direction and the second direction, respectively. When the operating member moves from the operating position to the operating position, the first guide slope is adapted to push against the second guide slope to drive the retaining member to disengage from the receiving groove.

[0042] In one embodiment, the operating member is rotatably connected to the housing and slidably connected to the retainer, which rotates relative to the housing and slides relative to the housing following the operation member.

[0043] According to another aspect of this application, a trolley is provided, comprising: a first element; a second element selectively movably or fixedly connected to the first element; an operating mechanism according to the foregoing embodiment, the operating mechanism being disposed on the first element; a locking member connected to the operating member, the locking member being movable between a locked position and an unlocked position, wherein when the locking member is in the locked position, the locking member engages with both the first element and the second element, the first element and the second element being fixedly connected; and when the locking member is in the unlocked position, the locking member releases engagement with at least one of the first element and the second element, the first element and the second element being movably connected; and a first reset member driving the locking member to move from the unlocked position to the locked position and driving the operating member to move from the operating position to the ready-to-operate position, wherein when the holding member is in the holding position, the locking member is in the unlocked position, and when the operating member is in the ready-to-operate position, the locking member is in the locked position, and the movement of the operating member from the ready-to-operate position to the operating position drives the locking member to move from the locked position to the unlocked position.

[0044] In one embodiment, the trolley further includes: a drive member operably connected to an operating member; and a traction member connecting the drive member to a locking member, wherein movement of the operating member from a pending position to an operating position drives the drive member to move, thereby driving the locking member from a locked position to an unlocked position via the traction member.

[0045] In one embodiment, the operating member moves from the position to be operated to the operating position, driving the driving member to pivot. The operating member is provided with a driving part, the driving part is provided with a slide groove, the driving member is provided with a connecting part, the slide groove is fitted with the connecting part, and the connecting part is configured to be pivotable in the slide groove and slidable along the slide groove.

[0046] In one embodiment, a second groove extending along a second direction is provided inside the housing, and a third groove is provided for the operating member. The extension direction of the third groove intersects the second direction and the first direction. A driving member is simultaneously provided in the second groove and the third groove. When the operating member slides in the first direction, the driving member slides in the second groove along the second direction.

[0047] In one embodiment, the trolley further includes: a handle, an operating member that rotates relative to the handle, the handle having a fifth groove that extends along a second direction; the operating member having a fourth groove that extends in a direction intersecting with the first and second directions, and a driving member that is simultaneously disposed in the fourth and fifth grooves, such that when the operating member rotates in the first direction, the driving member slides in the fifth groove along the second direction.

[0048] In one embodiment, the first element is the frame and the second element is the wheel seat.

[0049] An embodiment of this application also provides an operating mechanism for a trolley, comprising: an operating member slidably disposed on the trolley; a driving member operably connected to the operating member, wherein sliding of the operating member can drive the driving member from an initial position to a holding position; and a holding device connected to the driving member. The holding device is adapted to hold the driving member in the holding position.

[0050] In one embodiment, the retaining device includes: a locking member configured to pivot relative to the drive member between a locked position and an unlocked position, the locking member being adapted to retain the drive member in the retaining position; and a linkage member pivotally disposed relative to the drive member, the pivoting of the linkage member driving the locking member to rotate from the locked position to the unlocked position.

[0051] In one embodiment, the holding device includes: a locking member fixed relative to the trolley; and a linkage member movably connected between the driving member and the operating member, and slidably connected to the locking member. When the operating member slides from a first position to a second position along the positive direction of a first sliding direction, the operating member drives the linkage member to slide from a first linkage position to a second linkage position along the positive direction of a second sliding direction, and the linkage member drives the driving member to rotate from an initial position to a holding position. When the linkage member is in the second linkage position, the locking member engages with the linkage member and holds the linkage member in the second linkage position, the linkage member holds the driving member in the holding position, and holds the operating member in the second position.

[0052] In one embodiment, the operating mechanism further includes: a housing fixedly mounted on a trolley, a hollow mounting space provided inside the housing, a drive member and a retaining device disposed in the mounting space, and the housing also having a mounting opening communicating with the mounting space, into which the operating member is inserted.

[0053] In one embodiment, the drive member is pivotable relative to the trolley. When the operating member slides from the first position to the second position, the operating member pushes against the drive member to drive the drive member to pivot from the initial position to the holding position along a first rotational direction.

[0054] In one embodiment, the driving member has a latching portion protruding from the main body of the driving member, and a first latching groove is formed between the latching portion and the main body. The locking member has a first reset device that applies an elastic force to the locking member, causing the locking member to tend to pivot toward a locked position. When the driving member pivots along a first rotational direction from an initial position toward a holding position, the latching portion pushes against the locking member to drive the locking member to pivot from the locked position to the unlocked position. When the driving member reaches the holding position, under the action of the first reset device, the locking member pivots back to the locked position and enters the first latching groove to prevent the driving member from pivoting along a second rotational direction opposite to the first rotational direction, thereby holding the driving member in the holding position.

[0055] In one embodiment, the linkage is pivotable relative to the trolley. When the drive member is in the holding position and the operating member slides from the first position toward the third position, the operating member pushes against the linkage to drive the linkage to pivot along a first rotational direction, and the linkage pushes against the locking member to drive the locking member to pivot from the locked position toward the unlocked position. When the operating member reaches the third position, the locking member pivots to the unlocked position.

[0056] In one embodiment, the driving member and the linkage are configured to pivot about a first pivot axis. The linkage has a connecting post, and the driving member has an arc-shaped groove into which the connecting post is inserted. When the driving member is in the holding position and the operating member slides from the first position toward the third position, the operating member pushes against the connecting post, which in turn pushes against the end of the arc-shaped groove. The operating member drives the linkage and the driving member to pivot along a first rotation direction. When the operating member reaches the third position, the locking member disengages from the first engaging groove.

[0057] In one embodiment, the operating mechanism further includes: a first elastic device connected to the linkage, which applies an elastic force to the linkage such that when the drive member is in the holding position, the linkage tends to move onto the movement path of the operating member.

[0058] In one embodiment, the linkage is slidably connected to the operating member, and the first sliding direction is orthogonal to the second sliding direction.

[0059] In one embodiment, the linkage is provided with a first slide groove, the drive member is provided with a first connecting handle, the first connecting handle is inserted into the first slide groove, and the first connecting handle is configured to slide along the first slide groove and rotate in the first slide groove.

[0060] In one embodiment, the locking element is a positioning pin, and the linkage element is provided with a positioning groove. A limiting protrusion is formed in the positioning groove, and the limiting protrusion forms a guide path in the positioning groove. The positioning pin abuts against the bottom of the positioning groove and is located in the guide path. Through the cooperation of the positioning pin and the guide path, when the linkage element slides relative to the positioning pin, the positioning pin slides relative to the linkage element along the path defined by the guide path.

[0061] In one embodiment, the limiting protrusion has a second locking groove. When the linkage slides to the second linkage position, the positioning pin engages in the second locking groove to keep the linkage in the second linkage position.

[0062] In one embodiment, a guide protrusion is formed on the sidewall of the positioning groove facing the second engaging groove, and a guide slope is provided on the guide protrusion. Sliding the operating member in the second position along the first sliding direction causes the operating member to leave the second position, thereby driving the linkage member to leave the second linkage position. The positioning pin is disengaged from the second engaging groove. When the guide slope abuts against the positioning pin, the positioning pin drives the linkage member to slide, so that in the first sliding direction, the opening of the positioning groove is no longer aligned with the positioning pin.

[0063] In one embodiment, the operating mechanism further includes: a first elastic device connected to the linkage member, which applies an elastic force to the linkage member, causing the linkage member moving away from the second linkage position to have a tendency to slide toward the first linkage position.

[0064] In one embodiment, the holding device includes: a locking member fixed relative to the trolley; and a linkage member. The operating mechanism further includes: a bracket fixedly mounted on the trolley, a driving member pivotally mounted on the bracket, the bracket having a mounting through hole, the linkage member slidably mounted in the mounting through hole, and the locking member fixedly mounted in the mounting through hole. The linkage member is operably connected to the operating member. When the operating member slides from a first position to a second position, the operating member drives the linkage member to slide from the first linkage position to the second linkage position, and drives the driving member to pivot along a second rotation direction from the initial position to the holding position. The locking member engages with the linkage member, holding the linkage member in the second linkage position, and the linkage member holds the operating member in the second position.

[0065] In one embodiment, the operating member is provided with a second slide groove, and the driving member is provided with a second connecting handle, which is inserted into the second slide groove. The second connecting handle is configured to slide along and rotate within the second slide groove. When the operating member slides to the second position, the operating member holds the driving member in the holding position.

[0066] In one embodiment, one end of the linkage is provided with a cylindrical connecting portion, and the end of the connecting portion is provided with a cylindrical limiting portion, the diameter of the limiting portion being larger than the diameter of the connecting portion. The operating component is provided with a mounting boss, and the end of the mounting boss is provided with a mounting hole, the diameter of which is larger than the diameter of the connecting portion but smaller than the diameter of the limiting portion. The mounting boss is also provided with a receiving space, the mounting hole communicating with the receiving space, the connecting portion passing through the mounting hole, and the limiting portion being received in the receiving space.

[0067] In one embodiment, the end of the mounting boss is provided with a first engaging portion, which is serrated, and a first abutting ramp is provided on the side of the first engaging portion facing the linkage member. The end of the linkage member facing the mounting boss is provided with a second engaging portion, which is also serrated, and a second abutting ramp and a third abutting ramp are provided on the side of the second engaging portion facing the mounting boss. The second and third abutting ramps have different ramp extension lengths. When the operating member slides from the first position to the second position, the first abutting ramp abuts against the second and third abutting ramps to drive the linkage member to slide and pivot.

[0068] In one embodiment, the second engaging portion is provided with an engaging groove, and the linkage member is also provided with a through groove. During the process of the operating member driving the linkage member to slide from the first linkage position to the second linkage position, when the locking member extends into the through groove, the locking member restricts the pivoting of the linkage member by abutting against the through groove. When the linkage member slides to a position that causes the locking member to move out of the through groove, under the abutting action of the first pushing inclined surface against the second pushing inclined surface and the third pushing inclined surface, the linkage member pivots, causing the locking member to engage in the engaging groove, so as to keep the linkage member in the second linkage position.

[0069] In one embodiment, the operating mechanism further includes: a first elastic device connected to the linkage member, which applies an elastic force to the linkage member such that when the linkage member slides to a position that causes the locking member to move out of the through slot, the linkage member has a tendency to slide toward a first linkage position.

[0070] Embodiments of this application also provide an operating mechanism for a trolley, the trolley including a frame, comprising: an operating member configured to be movable relative to the frame between a pending operation position and an operation position, the operating member being at least partially exposed outside the frame for operation; a driving member configured to be movable relative to the frame between an initial position and a working position, the driving member being connected to the operating member, wherein when the operating member is in the pending operation position, the driving member is in the initial position, and when the operating member is in the operation position, the driving member is in the working position, and movement of the operating member from the pending operation position to the operation position drives the driving member to move from the initial position to the working position; and a holding device disposed on the frame and the operating member, adapted to hold the operating member in the operation position, or, the holding device disposed on the frame and the driving member, adapted to hold the driving member in the working position.

[0071] In one embodiment, the drive member is movably connected to the frame, and the retaining device includes a protrusion disposed on the drive member and a first engaging slot and a second engaging slot disposed on the frame; alternatively, the retaining device includes a first engaging slot and a second engaging slot disposed on the drive member and a protrusion disposed on the frame. When the drive member is in the initial position, the protrusion engages with the first engaging slot to hold the drive member in the initial position; when the drive member is in the working position, the protrusion engages with the second engaging slot to hold the drive member in the working position.

[0072] In one embodiment, the frame includes a rider and a positioning member fixed inside the rider. A drive member is disposed inside the rider and pivotally connected to the positioning member about a pivot axis in the pivot direction. A first locking groove and a second locking groove are disposed on the positioning member and are spaced apart in the pivot direction. A protrusion is disposed on the drive member.

[0073] In one embodiment, the frame includes a rider, a positioning member fixed inside the rider, and a fixing member fixedly connected to the positioning member. A drive member is disposed inside the rider and pivotally connected to the positioning member about a pivot axis in a pivot direction. The fixing member extends along the pivot axis, and the drive member is pivotally connected to the positioning member about the fixing member. The fixing member includes a disc-shaped body spaced apart from the drive member in a direction parallel to the pivot axis. The retaining device further includes a first biasing member abutting against the drive member and the disc-shaped body, the first biasing member applying an elastic force to the drive member to bias the drive member toward the positioning member.

[0074] In one embodiment, the drive member is pivotally connected to the frame about the pivot axis in the pivot direction. When the drive member is in the working position, the two opposite groove walls of the second locking groove abut against the protrusion in the pivot direction.

[0075] In one embodiment, the drive member is pivotally connected to the frame about a pivot axis in a pivot direction, wherein the extension length of the first locking groove is greater than the extension length of the protrusion in the pivot direction.

[0076] In one embodiment, the driving member has a partition rib between the first latching groove and the second latching groove. The partition rib has a first guide slope on the side facing the first latching groove and / or a first guide arc surface on the side of the protrusion in the first latching groove facing the partition rib. The partition rib has a second guide slope on the side facing the second latching groove and / or a second guide arc surface on the side of the protrusion in the second latching groove facing the partition rib.

[0077] In one embodiment, the drive member is pivotally connected to the frame about a pivot axis in the pivot direction, the operating member is connected to the drive member along the pivot axis, and the operating member is fixed relative to the drive member in the pivot direction.

[0078] In one embodiment, the drive element is pivotally connected to the frame about a pivot axis, and the drive element is slidably connected to the frame along the pivot axis.

[0079] In one embodiment, the drive member is movably connected to the frame and fixedly connected to the operating member. The retaining device includes a protrusion disposed on the operating member and a first engaging groove and a second engaging groove disposed on the frame, or a first engaging groove and a second engaging groove disposed on the operating member and a protrusion disposed on the frame. When the operating member is in the position to be operated, the protrusion engages with the first engaging groove to retain the operating member in the position to be operated. When the operating member is in the operating position, the protrusion engages with the second engaging groove to retain the operating member in the operating position.

[0080] In one embodiment, the frame includes a rider, a drive unit is slidably connected to the rider along the extension direction of the rider, an operating unit is fixedly connected to the drive unit, a first locking groove and a second locking groove are disposed on the rider, and a protrusion is disposed on the operating unit.

[0081] In one embodiment, the rider has a groove extending in the extension direction, a drive member passes through the groove and slides in the groove in the extension direction, and an operating member is fitted onto the rider.

[0082] In one embodiment, the retaining device includes a spring arm disposed on the operating member, one end of the spring arm being connected to the operating member, the other end of the spring arm having a protrusion, and the spring arm having an elastic force toward the rider.

[0083] In one embodiment, the retaining device includes an operating end that protrudes from the other end of the spring arm toward the side away from the operating member.

[0084] In one embodiment, the holding device includes a release button disposed on the operating member, the release button being pivotally connected to the operating member about a pivot axis between a holding position and a release position, the release button having a protrusion. When the operating member slides to the operating position and the release button pivots to the holding position, the protrusion engages in a first engaging groove to hold the operating member in the operating position. When the operating member slides to the operating position and the release button pivots to the holding position, the protrusion engages in a second engaging groove to hold the operating member in the operating position.

[0085] In one embodiment, the holding device further includes a second biasing member disposed at the first end of the release button, wherein a protrusion is disposed at the second end of the release button opposite to the first end, the pivot axis of the release button is disposed between the protrusion and the second biasing member, and the second biasing member biases the first end of the release button so that the release button has a tendency to pivot toward the holding position.

[0086] In one embodiment, the operating member is pivotally connected to the frame about a pivot axis in the pivot direction, the drive member is fixedly connected to the operating member, and a retaining device is disposed on the outer surface of the drive member and the outer surface of the frame. When the drive member is in the initial position, the drive member and the frame abut against each other in a first position to hold the drive member in the initial position. When the drive member is in the working position, the drive member and the frame abut against each other in a second position different from the first position to hold the drive member in the working position.

[0087] In one embodiment, the frame includes a rider and a positioning member fixedly connected to the rider. The positioning member includes a sleeve portion fitted onto the rider and a pivot portion protruding outward from the sleeve portion. The pivot portion is pivotally connected to an operating member. The operating member includes a pivot portion pivotally connected to the pivot portion and an operating portion for operation. A drive member is located between the pivot portion and the operating portion. When the drive member is in an initial position, the drive member and the pivot portion abut against each other in a first position to hold the drive member in the initial position. When the drive member is in a working position, the drive member and the pivot portion abut against each other in a second position to hold the drive member in the working position.

[0088] In one embodiment, the frame further includes a retaining pin fixedly disposed inside the rider's compartment. When the drive member is in its initial position, on a projection plane perpendicular to the pivot axis X2, the projection of the drive member lies on a first side of the virtual line connecting the projection of the retaining pin and the projection of the pivot axis X2. When the drive member is in its operating position, on the projection plane, the projection of the drive member lies on a second side of the virtual line connecting the projection of the retaining pin and the projection of the pivot axis X2, opposite to the first side.

[0089] In one embodiment, when the drive member is in the initial position, the drive member abuts against the frame in the opposite direction of the pivoting direction at a first position; when the drive member is in the working position, the drive member abuts against the frame in the forward direction of the pivoting direction at a second position.

[0090] In one embodiment, the operating member is pivotally connected to the frame about a pivot axis in a pivoting direction. The retaining device includes a protrusion on the operating member and a first engaging slot and a second engaging slot on the frame, or includes a first engaging slot and a second engaging slot on the operating member and a protrusion on the frame. When the operating member is in the ready-to-operate position, the protrusion engages with the first engaging slot to hold the operating member in the ready-to-operate position. When the operating member is in the operated position, the protrusion engages with the second engaging slot to hold the operating member in the operated position.

[0091] In one embodiment, the retaining device further includes a locking member movably disposed on the operating member, a first locking groove and a second locking groove disposed on the frame, and a protrusion disposed on the locking member.

[0092] In one embodiment, the engaging member is slidably connected to the operating member, and the retaining device further includes a third biasing member disposed between the operating member and the engaging member. The third biasing member applies an elastic force to the engaging member to bias the engaging member toward the frame.

[0093] In one embodiment, the frame includes a rear foot connecting rod and a positioning member fixed to the outside of the rear foot connecting rod, an operating member is pivotally connected to the positioning member, and a first locking groove and a second locking groove are provided on the positioning member.

[0094] In one embodiment, the drive element is at least partially disposed inside the rear foot connecting rod and is fixedly connected to the operating element.

[0095] In one embodiment, the drive element is provided with a drive through hole that extends in a generally S-shape.

[0096] In one embodiment, the operating element and the drive element are pivotally mounted on the frame about the same pivot axis, and the operating element and the drive element are fixedly connected.

[0097] In one embodiment, the retaining device further includes a second pin, which passes through the operating member and the driving member in a direction parallel to the pivot axis to fix the operating member and the driving member together. The second pin is spaced apart from the pivot axis. The frame is provided with a limiting groove, through which the second pin passes. When the operating member pivots between the waiting position and the operating position, the second pin slides in the limiting groove.

[0098] In one embodiment, one of the operating member and the driving member is provided with a positioning groove, and the other of the operating member and the driving member is provided with a positioning part. The positioning part is fitted into the positioning groove along the pivot axis, and the driving member is fixed relative to the operating member in the pivot direction.

[0099] In one embodiment, the positioning member is provided with two first arc-shaped portions spaced apart in the pivoting direction, and the second engaging groove is formed by the gap between adjacent first arc-shaped portions. The first engaging groove is formed by the top end of at least one first arc-shaped portion being recessed. The end of the engaging member is provided with a second arc-shaped portion, and the top end of the second arc-shaped portion protrudes outward to form a protrusion.

[0100] In one embodiment, one of the engaging member and the operating member is provided with a guide groove, and the other of the engaging member and the operating member is provided with a guide rib. By engaging the guide rib in the guide groove, the engaging member is slidably disposed in the operating member.

[0101] In one embodiment, the operating member is provided with a pushing portion, and the driving member is slidably mounted on the frame, the driving member being provided with an abutment portion. When the operating member pivots from the waiting position to the operating position, the pushing portion pushes against the abutment portion to drive the driving member to slide from the initial position to the working position.

[0102] In one embodiment, the abutting part is provided with an abutting slope, and the pushing part pushes against the abutting slope and slides on the abutting slope.

[0103] In one embodiment, the operating mechanism includes two driving members that slide in opposite directions, and each driving member is provided with an abutment portion. The operating member is provided with two pushing portions that respectively push against the two abutment portions.

[0104] In one embodiment, the frame includes a rear foot connecting rod and a positioning member fixed to the outside of the rear foot connecting rod. An operating member is pivotally connected to the positioning member. A first locking groove and a second locking groove are provided on the operating member, and a protrusion is provided on the positioning member. Attached Figure Description

[0105] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0106] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0107] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0108] Figure 1 This is a schematic diagram of the structure of a trolley according to an embodiment of this application.

[0109] Figure 2 For along Figure 1 The sectional view shown is taken from the virtual plane A.

[0110] Figure 3 An exploded view of the operating mechanism and drive unit, and the driver, according to an embodiment of this application.

[0111] Figure 4 This is a schematic diagram of the structure of a first cover according to an embodiment of this application.

[0112] Figure 5 This is a schematic diagram of the structure of an operating component according to an embodiment of this application.

[0113] Figure 6 This is a schematic diagram of the structure of a retainer according to an embodiment of this application.

[0114] Figure 7This is a schematic diagram of the structure of a driver according to an embodiment of this application.

[0115] Figure 8 This is a partial structural schematic diagram of the driver and operating mechanism according to an embodiment of this application, with the viewpoint following... Figure 1 The observation direction B is shown, with the operating component in the position to be operated.

[0116] Figure 9 For along Figure 8 The cross-sectional view shown is taken from the EE line.

[0117] Figure 10 For along Figure 8 The sectional view shown is taken along the DD line.

[0118] Figure 11 For along Figure 8 The cross-sectional view shown is taken along the CC line.

[0119] Figure 12 For along Figure 8 The cross-sectional view shown is taken by the HH line.

[0120] Figure 13 This is a partial structural schematic diagram of the driver and operating mechanism according to an embodiment of this application, with the viewpoint following... Figure 1 The observation direction B is shown, with the operating component in the operating position.

[0121] Figure 14 For along Figure 12 The cross-sectional view shown is taken from the GG line.

[0122] Figure 15 For along Figure 12 The cross-sectional view shown is taken from the FF line.

[0123] Figure 16 This is a schematic diagram of the structure of a trolley according to an embodiment of this application.

[0124] Figure 17 for Figure 16 A magnified view of part J in the middle.

[0125] Figure 18A This is a schematic diagram of the structure of an operating mechanism according to an embodiment of the present application, wherein the operating element is in the position to be operated.

[0126] Figure 18B This is a schematic diagram of the structure of an operating mechanism according to an embodiment of the present application, wherein the operating element is in the operating position.

[0127] Figure 19 This is an exploded view of the operating mechanism according to one embodiment of this application.

[0128] Figure 20 For along Figure 18A The cross-sectional view shown is taken from the virtual plane H1, with the operating element in the position to be operated.

[0129] Figure 21 For along Figure 18B The sectional view shown is taken from the virtual plane H2, with the operating element in the operating position.

[0130] Figure 22A This is a schematic diagram of the structure of an operating mechanism according to an embodiment of the present application, wherein the operating element is in the position to be operated.

[0131] Figure 22B This is a schematic diagram of the structure of an operating mechanism according to an embodiment of the present application, wherein the operating element is in the operating position.

[0132] Figure 23 This is an exploded view of the operating mechanism according to one embodiment of this application.

[0133] Figure 24 For along Figure 22A The cross-sectional view shown is taken from the virtual plane I1, with the operating element in the position to be operated.

[0134] Figure 25 For along Figure 22B The cross-sectional view shown is taken from the virtual plane I2, with the operating element in the operating position.

[0135] Figure 26 This is a schematic diagram of the structure of an operating mechanism according to an embodiment of the present application, wherein the operating element is in the position to be operated.

[0136] Figure 27 This is an exploded view of the operating mechanism according to one embodiment of this application.

[0137] Figure 28 This is a schematic diagram of the structure of a first cover according to an embodiment of this application.

[0138] Figure 29 This is a schematic diagram of the structure of a retainer according to an embodiment of this application.

[0139] Figure 30A According to Figure 26 A side view taken from one side of the first cover along the positive direction of the second direction.

[0140] Figure 30B for Figure 30A A schematic diagram showing the operation component rotated to the operation position.

[0141] Figure 31 For along Figure 30AThe sectional view shown is taken along line K1-K1, with the operating component in the position to be operated.

[0142] Figure 32 For along Figure 30B The sectional view shown is taken along line K2-K2, with the operating component in the operating position.

[0143] Figure 33 This is a perspective view of a trolley according to an embodiment of the present application, wherein the trolley is provided with an operating mechanism in an initial state.

[0144] Figure 34A For along Figure 33 A cross-sectional view taken along line AA, showing the steering mechanism of the wheels in a locked state.

[0145] Figure 34B It shows Figure 34A The steering mechanism shown is in the unlocked state.

[0146] Figure 35A for Figure 33 A perspective view of the operating mechanism of the trolley in the picture.

[0147] Figure 35B for Figure 35A Side view of the operating mechanism shown.

[0148] Figure 36 for Figure 35A An exploded view of the operating mechanism shown.

[0149] Figure 37 For along Figure 35B The sectional view taken from line B1-B1 in the figure.

[0150] Figure 38 For along Figure 35B The sectional view taken from line B2-B2 in the image.

[0151] Figure 39 It shows Figure 38 The operating mechanism shown is in the state of being pressed for the first time.

[0152] Figure 40 It shows Figure 38 The operating mechanism shown is in the state after the first press and release.

[0153] Figure 41 It shows Figure 38 The operating mechanism shown is in a state of being pressed for the second time.

[0154] Figure 42 This is a perspective view of an operating mechanism according to an embodiment of the present application, wherein the operating mechanism is in an initial state.

[0155] Figure 43 For along Figure 42 The sectional view shown is taken from the virtual plane D.

[0156] Figure 44 It shows Figure 43 The operating mechanism shown is in the state after the first press has been released.

[0157] Figure 45 for Figure 42 An exploded view of the operating mechanism shown.

[0158] Figure 46 For along Figure 42 A cross-sectional view taken along the CC line.

[0159] Figure 47 This is a perspective view of an operating mechanism according to an embodiment of the present application, wherein the operating mechanism is in an initial state.

[0160] Figure 48 for Figure 47 An exploded view of the operating mechanism shown.

[0161] Figure 49 For along Figure 47 The sectional view shown is taken from the virtual plane E.

[0162] Figure 50 It shows Figure 47 The operating mechanism shown is in the state after the first press has been released.

[0163] Figure 51 for Figure 47 The diagram shows a cross-sectional view of the operating mechanism from a perspective perspective, omitting the traction component.

[0164] Figure 52 for Figure 51 The sectional view of the linkage on one side is omitted.

[0165] Figure 53 for Figure 47 The diagram shows a perspective view of the operating mechanism, omitting the housing and the linkage on the other side, and showing a portion of the bracket.

[0166] Figure 54 for Figure 47 Another perspective view of the operating mechanism shown, in which... Figure 53 Based on this, the operating components were further omitted.

[0167] Figure 55 for Figure 47 Another perspective view of the operating mechanism shows the linkage of the operating mechanism in a state about to enter the second linkage position.

[0168] Figure 56A This is a schematic diagram of the structure of a cart according to one embodiment of this application.

[0169] Figure 56B This is a schematic diagram of the structure of a cart according to one embodiment of this application.

[0170] Figure 57A It is along Figure 1 The cross-sectional view shown is taken from virtual plane A, in which the locking element is in the locked position.

[0171] Figure 57B yes Figure 57A A cross-sectional view of the locking element in the unlocked position.

[0172] Figure 58 yes Figure 1 An enlarged view of section B is shown.

[0173] Figure 59 It is along Figure 58 The cross-sectional view shown is taken from the virtual plane C, where the operating component is in the position to be operated.

[0174] Figure 60 It shows Figure 59 The operating component is rotated to the operating position.

[0175] Figure 61 This is an exploded view of the operational structure according to an embodiment of this application.

[0176] Figure 62 This is an exploded view of the operational structure according to an embodiment of this application.

[0177] Figure 63 yes Figure 61 An enlarged view of part D is shown.

[0178] Figure 64 yes Figure 62 An enlarged view of part E is shown.

[0179] Figure 65 This is a schematic diagram of the structure of a cart according to one embodiment of this application.

[0180] Figure 66 It is along Figure 65 The diagram shows a cross-sectional view taken from the virtual plane F, in which the operating element is in the position to be operated.

[0181] Figure 67 It shows Figure 66 The shown operating component is in the operating position.

[0182] Figure 68 This is a schematic diagram of the structure of a cart according to one embodiment of this application.

[0183] Figure 69 It is along Figure 68 The diagram shows a cross-sectional view taken from the virtual plane G, in which the operating element is in the position to be operated.

[0184] Figure 70 It shows Figure 68 The shown operating component is in the operating position.

[0185] Figure 71 This is a schematic diagram of the structure of a cart according to one embodiment of this application.

[0186] Figure 72 It is along Figure 71 The cross-sectional view shown is taken from the virtual plane H, in which the operating component is in the position to be operated.

[0187] Figure 73 It shows Figure 71 The shown operating component is in the operating position.

[0188] Figure 74A This is a schematic diagram of the structure of a cart according to one embodiment of this application.

[0189] Figure 74B yes Figure 74A An enlarged view of part I0.

[0190] Figure 74C yes Figure 74B The portion shown is viewed along the extension direction of the rear foot connecting rod.

[0191] Figure 75 It is along Figure 74C The cross-sectional view shown is taken along line I1-I1, in which the operating element is in the position to be operated.

[0192] Figure 76 It is along Figure 74C The cross-sectional view shown is taken along line I2-I2, in which the operating element is in the position to be operated.

[0193] Figure 77 It shows Figure 75 The shown operating component is in the operating position.

[0194] Figure 78 It shows Figure 76 The shown operating component is in the operating position.

[0195] Figure 79 This is an exploded view of the operational structure according to an embodiment of this application.

[0196] Figure 80 This is a cross-sectional view of the operating mechanism according to another embodiment of the present application, taken along line I1-I1, wherein the operating element is in the position to be operated.

[0197] Figure 81 yes Figure 80 A cross-sectional view of the operating component in the position to be operated.

[0198] Figure 82 This is a schematic diagram of the structure of a cart according to one embodiment of this application.

[0199] Figure 83 It is along Figure 82 The cross-sectional view shown is taken from the virtual plane J, where the operating component is in the position to be operated.

[0200] Figure 84 yes Figure 83 The diagram shows the structure of the operating mechanism in the indicated state, where the operating components are omitted.

[0201] Figure 85 yes Figure 83 A sectional view of the operating component in the operating position.

[0202] Figure 86 yes Figure 85 The diagram shows the structure of the operating mechanism in the indicated state, where the operating components are omitted.

[0203] Figure 87 yes Figure 82 An exploded view of the operational structure of the embodiment shown.

[0204] Figure 88 yes Figure 82 An exploded view of the operational structure of the embodiment shown.

[0205] Figure 89 yes Figure 87 A schematic diagram of the main body of the operating component in the embodiment shown.

[0206] Figure 90 yes Figure 88 A schematic diagram of the structure of the third cover of the operating component in the embodiment shown.

[0207] Figure 91 yes Figure 87 A schematic diagram of the structure of the first support of the operating component in the embodiment shown.

[0208] Figure 92 yes Figure 87 The diagram shows the structure of the engaging component of the operating component in the embodiment shown.

[0209] Figure 93 This is a schematic diagram of the structure of an operating mechanism according to an embodiment of the present application, wherein the operating element is in the position to be operated.

[0210] Figure 94 yes Figure 93 A schematic diagram of the structure in which the operating component is in the operating position.

[0211] Figure 95 It is along Figure 93 The cross-sectional view shown is taken from the virtual plane K.

[0212] Figure 96 It is along Figure 94 The sectional view shown is taken from the virtual plane L.

[0213] Figure 97 This is a schematic diagram of the structure of an operating mechanism according to an embodiment of the present application, wherein the operating element is in the position to be operated.

[0214] Figure 98 It is along Figure 97 The cross-sectional view shown is taken from the virtual plane M.

[0215] Figure 99 This is a schematic diagram of the structure of an operating mechanism according to an embodiment of the present application, wherein the operating element is in the operating position.

[0216] Figure 100 It is along Figure 99 The cross-sectional view shown is taken from the virtual plane N.

[0217] Explanation of reference numerals in the attached figures:

[0218] A1. Trolley;

[0219] A10, Operating mechanism; A100, Operating component; A101, Operating part; A102, First semi-cylinder; A103, Second semi-cylinder; A104, First end; A105, Second end; A111, Receiving part; A111a, Through hole; A111b, Sliding hole; A111c, Groove; A111d, Receiving groove; A1111, First guide slope; A120, Clearance hole; A130, Driving part; A 131. Slide groove; A140. Guide groove; A141. Guide rib; A150. Receiving groove; A151. First groove wall; A152. Second groove wall; A160. Second guide protrusion; A161. Center guide protrusion; A162. Edge guide protrusion; A170. Third groove; A180. Bracket; A181. Mounting hole; A1811. Guide groove; A1812. Center guide protrusion; A183. Fifth groove;

[0220] A210, Retaining element; A2101, Clearance groove; A211, Unlocking part; A212, Transition part; A213, Engaging part; A2131, Second guide ramp; A214, Limiting part; A215, Mounting groove; A216, Guide part; A217, Abutting surface; A218, Limiting surface; A220, Elastic element; A2411, Second guide ramp; A250, Second reset element; A270, Pivoting part; A2701, Pivoting hole; A271, Pivoting pin; A290, Abutting part;

[0221] A300, First cover; A310, Mounting cavity; A311, First cavity wall; A312, Second cavity wall; A313, Third cavity wall; A320, Operating hole; A330, Retaining hole; A340, First guide protrusion; A341, Center guide strip; A342, Edge guide strip; A350, Sleeve cavity; A390, Guide slide; A391, First guide slope;

[0222] A410, Driving component; A4101, First column; A4102, Second column; A411, Connecting part; A412, Connecting hole; A420, Pivot shaft;

[0223] A500, Second cover; A510, Second mounting part; A511, Second groove;

[0224] A600, frame; A601, second locking hole; A610, rider;

[0225] A700, Rear wheel; A710, Wheel seat; A720, Wheel; A701, First locking hole;

[0226] A800, locking component; A801, first reset component; A802, traction component;

[0227] A900, housing; A920, first mounting part; A921, first groove; A922, end cap; A923, retaining hole; A930, fourth groove;

[0228] AX1, axis; AX2, pivot axis; AI, centerline; AX3, pivot axis; AX4, axis;

[0229] AD1, First direction; AD2, Second direction; AD3, Third direction;

[0230] B1. Trolley;

[0231] B10. Operating mechanism;

[0232] B11, Operating component; B110, Pushing part; B111, Second slide groove; B112, Mounting boss; B1120, Receiving groove; B1121, Connecting opening; B113, Mounting hole; B114, Receiving space; B115, First engaging part; B116, First pushing slope; B117, Third reset device; B118, First stop; B119, Main body; B1190, Slide rail;

[0233] B12, Driving component; B120, Main body; B121, Protrusion; B122, Snap-fit ​​part; B123, First snap-fit ​​groove; B124, Arc-shaped slide groove; B125, First connecting handle; B126, Second connecting handle; B127, Pivot pin; B152, Pivot hole; B129, Shaft hole;

[0234] B13, Retaining device; B131, Locking element; B1311, First reset device; B1312, Mounting base; B1313, Limiting protrusion; B1314, Biasing element; B1315, Limiting recess; B132, Linking element; B1320, Second locking groove; B13201, Third sliding groove; B1321, Pushing end; B1322, Connecting column; B1323, First sliding groove; B1324, Positioning groove; B13241, First sidewall; B1324 2. Second sidewall; B13243. Left sidewall; B13244. Limiting step; B1325. Limiting protrusion; B1326. Guide path; B1327. Guide protrusion; B1328. Guide slope; B1329. Opening; B133. Connecting part; B134. Limiting part; B135. Second engaging part; B1351. Engaging groove; B136. Second pushing slope; B137. Third pushing slope; B138. Through groove; B139. Shaft hole;

[0235] B14, Housing; B141, Installation space; B142, Installation opening; B143, Second flange; B144, Limiting hole; B145, First housing; B146, Second housing; B147, Blind hole;

[0236] B15, bracket; B151, mounting through hole; B152, limiting groove; B16, B17, B18, first elastic device; B161, connecting end; B19, frame; B171, rider;

[0237] B20, traction component; B21, locking pin; B22, locking groove; B23, pivot seat; B24, wheel seat; B25, wheel; B26, reset component;

[0238] BR1, First rotation direction; BR2, Second rotation direction; BR3, Third rotation direction;

[0239] BX1, First pivot axis; BX2, Second pivot axis; BX3, Third pivot axis;

[0240] BD1, First sliding direction; BD2, Second sliding direction;

[0241] BT1, First Path; BT2, Second Path; BT3, Third Path;

[0242] C1. Trolley;

[0243] C10, Operating mechanism;

[0244] C11, Operating component; C110, Housing; C111, Spring arm; C112, Operating end; C113, Release button; C1131, First end; C1132, Second end; C114, Positioning groove; C115, Pushing part; C117, Operating part; C1171, Pivoting part; C1173, Mounting hole; C118, Guide rib; C119, Connecting protrusion; C1101, Mounting cavity; C1102, Second connecting hole; C1103, Second pivoting hole; C1104, Connecting part;

[0245] C12, Driving component; C120, First connecting hole; C121, Limiting groove; C122, Driving through hole; C123, Positioning part; C124, Abutting part; C1241, Abutting slope; C125, Connecting post; C126, Connecting groove; C127, Mounting cavity; C128, Mounting through hole; C129, First pivot hole;

[0246] C13, Retaining device; C131, Protrusion; C1311, First guide arc surface; C1312, Second guide arc surface; C132, Snap-fit ​​groove; C1321, First snap-fit ​​groove; C1322, Second snap-fit ​​groove; C1323, Separating rib; C1324, First guide slope; C1325, Second guide slope; C133, Protrusion; C134, Snap-fit ​​portion; C1341, Second snap-fit ​​groove C1342, First snap-fit ​​groove; C1343, Second snap-fit ​​groove; C1344, First snap-fit ​​groove; C135, Snap-fit ​​part; C1351, First end; C1352, Second end; C1353, Second arc-shaped part; C1354, Guide groove; C136, Protrusion; C137, Snap-fit ​​part; C1371, Second snap-fit ​​groove; C1372, First snap-fit ​​groove; C1373, Elastic wall;

[0247] C14, First biasing component;

[0248] C15, Positioning component; C151, Limiting groove; C152, First arc-shaped portion; C153, Connecting round hole; C154, First positioning component; C1541, Second fixing hole; C1542, Mounting groove; C155, Second positioning component; C1551, Third fixing hole; C1552, Mounting groove; C156, First positioning component; C157, Second positioning component; C158, Sleeve portion; C1581, Clearance groove; C159, Pivot portion;

[0249] C16, Second biasing component;

[0250] C17, Third biasing component;

[0251] C18, Fourth biasing component;

[0252] C19, fastener; C191, columnar body; C192, disc-shaped body; C193, first pin; C194, second pin;

[0253] C2. Chassis;

[0254] C20, Towing component; C21, Slide groove; C22, First locking hole; C23, Second locking hole; C24, Wheel seat; C25, Wheel; C26, Mounting part; C261, Mounting channel; C27, First guide component; C28, Fixing pin; C29, Locking component; C210, Handlebar; C220, Rear foot connecting rod; C221, Clearance through hole; C222, First fixing hole; C224, Reset component; C240, Fastener; C250, Second guide component;

[0255] C30, main body; C31, cover; C301, first end; C302, second end; C303, middle part;

[0256] CX1, Pivot axis; CX2, Pivot axis; CX3, Pivot axis; CX4, Pivot axis; CX5, Pivot axis; CX6, Pivot axis; CX7, Pivot axis;

[0257] CD1, Pivot direction; D2, Extension direction; CD3, Direction perpendicular to the extension direction CD2; D4, Pivot direction; D5, Pivot direction; D6, Pivot direction; D7, Pivot direction; CD8, Pivot direction. Detailed Implementation

[0258] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate preferred embodiments of the application. However, this application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0259] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0260] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0261] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0262] refer to Figures 1 to 2 Embodiments of this application provide an operating mechanism A10 for a trolley A1. Figure 1 and Figure 2 In the illustrated embodiment, the trolley A1 includes a first element, a second element, a locking member A800, and an operating mechanism A10. The second element is selectively movably or fixedly connected to the first element. The operating mechanism A10 is disposed on the first element, and the user switches the first and second elements from a fixed connection to a movable connection by operating the operating mechanism A10. Optionally, the operating mechanism A10 includes an operating member A100, which the user applies an external force to, for example, along direction B, to move from a waiting position to an operating position, thereby switching the first and second elements from a fixed connection to a movable connection. The locking member A800 is connected to the operating member A100, and the movement of the operating member A100 from the waiting position to the operating position drives the locking member A800 from a locked position to an unlocked position. When the locking member A800 is in the locked position, it engages the first and second elements, fixing them together, and thus locking the relative movement between the first and second elements. When the locking member A800 is in the unlocked position, the locking member A800 releases its engagement with at least one of the first element and the second element, and the first element and the second element switch to a movable connection. At this time, the locking member A800 releases the relative movement between the first element and the second element.

[0263] In this embodiment, the trolley A1 includes a frame A600, wheel seats A710, and wheels A720. The frame A600 and wheel seats A710 are selectively pivotally or fixedly connected to each other, while the wheels A720 are pivotally connected to the wheel seats A710. When the frame A600 and wheel seats A710 are pivotally connected, the wheels A720 are configured as omnidirectional wheels; when the frame A600 and wheel seats A710 are fixedly connected, the wheels A720 are configured as directional wheels. Figure 1 In the illustrated embodiment, wheel A720 is the rear wheel A700, but this is merely exemplary. In other embodiments, wheel A720 may be or include any wheel A720 of the trolley A1; for example, wheel A720 may be the front wheel or wheel A720 may include both the front and rear wheels A700. Optionally, the first element is the frame A600, and the second element is the wheel seat A710. The frame A600 has a second locking hole A601, and the wheel seat A710 has a first locking hole A701. In the moving direction of the locking member A800, when the second locking hole A601 and the first locking hole A701 are aligned, the locking member A800 simultaneously inserts into and engages with both the first locking hole A701 and the second locking hole A601, thus fixing the frame A600 and the wheel seat A710 together, preventing relative pivoting. When the locking member A800 disengages from the first locking hole A701, the frame A600 and the wheel seat A710 are pivotally connected, allowing relative pivoting. The operating mechanism A10 is mounted on the frame A600, which includes a handlebar A610. The operating mechanism A10 is, for example, mounted on the handlebar A610. Optionally, depending on actual needs, the operating mechanism A10 can be positioned at any location on the cart A1. The operating component A100 is connected to the locking component A800. The user operates the operating component A100 to move it from the waiting position to the operating position, and pulls the locking component A800 out of the first locking hole A701 to drive the locking component A800 from the locked position to the unlocked position. This unlocks the relative movement between the frame A600 and the wheel seat A710. At this time, the wheel seat A710 can pivot relative to the frame A600, and the wheel A720 is set as a swivel wheel relative to the frame A600 to facilitate the turning of the trolley A1.

[0264] In one embodiment of this application, the trolley A1 further includes a reset member A801, which drives the locking member A800 from the unlocked position to the locked position and drives the operating member A100 from the operating position to the ready-to-operate position. Optionally, in this embodiment, the locking member A800 is connected to the reset member A801, which continuously applies a spring force to the locking member A800, causing the locking member A800 to tend to slide towards the first locking hole A701. Optionally, the reset member is a spring, torsion spring, or sheet spring. In other words, when the operating member A100 no longer applies force to the locking member A800, under the action of the reset member A801, the locking member A800 can automatically return to the first locking hole A701 to move from the unlocked position to the locked position, thereby locking the relative movement between the frame A600 and the wheel seat A710. At this time, wheel seat A710 cannot pivot relative to frame A600, and wheel A720 is positioned as a directional wheel relative to frame A600. Simultaneously, since locking member A800 is connected to operating member A100, reset member A801 ​​directly drives locking member A800 from the unlocked position to the locked position, and indirectly drives operating member A100 from the operating position to the ready-to-operate position. In other embodiments, reset member A801 ​​may be connected to operating member A100 instead of locking member A800; reset member A801 ​​directly drives operating member A100 from the operating position to the ready-to-operate position, and indirectly drives locking member A800 from the unlocked position to the locked position.

[0265] Those skilled in the art will understand that although the stroller A1 shown in the accompanying drawings is a children's stroller, this is merely exemplary, and stroller A1 can be any stroller, such as a camping trailer, shopping cart, etc., and this application does not limit it. Furthermore, although the accompanying drawings show the locking member A800 of the wheel seat A710 and frame A600 being moved from a locked position to an unlocked position using the operating mechanism A10, this is also exemplary. Optionally, the locking member A800 can also be other devices on the stroller, such as the locking member of the front wheel steering locking mechanism, the locking member of the wheel braking mechanism, the locking member of the handlebar extension mechanism, the locking member of the handlebar reversing mechanism, the locking member of the frame folding mechanism, etc., and this application does not limit it. Those skilled in the art will understand that if the target device is another device on the stroller, then the first element and the second element are correspondingly components associated with that other device.

[0266] Please refer to the above. Figures 3 to 6For ease of description, the following directional terms are introduced in this application: first direction AD1, second direction AD2, and third direction AD3. Unless explicitly defined, these directional terms should be interpreted broadly, encompassing two opposing directions on any imaginary straight line. In this application, such two opposing directions are expressed as "positive direction" and "negative direction." For example, in this application, "sliding along the first direction AD1" means sliding both along the positive and negative directions of the first direction AD1. In one embodiment of this application, the operating mechanism A10 includes an operating member A100, a retaining member A210, and a housing A900. Both the operating member A100 and the retaining member A210 are movable relative to the housing A900. The housing A900 is provided with an operating hole A320 and a hollow mounting cavity A310, the operating hole A320 communicating with the mounting cavity A310. Optionally, the housing A900 includes a first cover A300 and a second cover A500, which are snapped together to form the housing A900. Optionally, an operation hole A320 is provided on the first cover A300. The first cover A300 and the second cover A500 have hollow internal structures, and the mounting cavity A310 is formed by the hollow internal structures of the first cover A300 and the second cover A500. An operating member A100 is movably disposed in the operation hole A320. Optionally, the operating member A100 is provided with an operating portion A101, which protrudes at least partially from the operation hole A320 when the operating member A100 is in the ready-to-operate position. In this embodiment, the operating portion A101 is for the user to press. Optionally, the operating member A100 is slidably disposed in the operating hole A320 and is capable of sliding along the first direction AD1. The sliding trajectory of the operating member A100 passes through at least the operating position and the operating position. Optionally, the shape of the operating hole A320 is adapted to the orthographic projection shape of the operating part A101 on a plane perpendicular to the first direction AD1. Therefore, the operating part A101 can protrude from the housing A900 along the first direction AD1, and the operating hole A320 can limit the operating member A100, so that the operating member A100 can only slide along the first direction AD1. The retaining member A210 is slidably disposed in the mounting cavity A310 and is capable of sliding along the second direction AD2. The sliding trajectory of the retaining member A210 passes through at least the holding position and the release position. Figures 3 to 6In the illustrated embodiment, the first direction AD1 and the second direction AD2 are orthogonal. Those skilled in the art will understand that the orthogonality of the first direction AD1 and the second direction AD2 is merely exemplary, and they can choose other relative positional relationships for the first direction AD1 and the second direction AD2 according to actual needs, such as the first direction AD1 and the second direction AD2 being parallel or intersecting at other angles. Optionally, when the operating member A100 is in the operating position (i.e., before the user presses the operating part A101), there is no connection between the retaining member A210 and the operating member A100 that can restrict the sliding of the operating member A100. When the operating member A100 slides to the operating position (for example, the position reached by the operating member A100 after the user presses the operating part A101 to drive the operating member A100 to slide), the retaining member A210 slides to the retaining position. A connection relationship is established between the retaining member A210 and the operating member A100 to restrict the sliding of the operating member A100. For example, the retaining member A210 abuts against the operating member A100 in the first direction AD1, and the retaining member A210 blocks the operating member A100 from sliding in the first direction AD1, for example, blocking the sliding of the operating member A100 from the operating position to the waiting position.

[0267] refer to Figure 3 , Figure 5 and Figure 6 In one embodiment of this application, the operating member A100 includes a latching portion A111, and the retaining member A210 includes a locking portion A213. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the latching portion A111 and the locking portion A213 abut against each other in the first direction AD1, thereby preventing the operating member A100 from moving from the operating position to the waiting position. Optionally, in one embodiment of this application, the latching portion A111 includes a through hole A111a. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the locking portion A213 can enter and be accommodated in the through hole A111a. The wall of the through hole A111a abuts against the locking portion A213 in the first direction AD1, thereby preventing the operating member A210 from moving from the operating position to the waiting position. Optionally, the locking portion A213 is configured as a generally cylindrical structure.

[0268] Optionally, the retaining member A210 is further provided with an unlocking part A211. In the second direction AD2, the unlocking part A211 is located on one side of the engaging part A213 and protrudes from the operating member A100. Optionally, the unlocking part A211 protrudes from the outside of the operating member A100 through a through hole A111a. The user presses the unlocking part A211 to drive the retaining member A210 to slide in the second direction AD2. Optionally, the user presses the unlocking part A211 to drive the retaining member A210 to slide from a holding position to a releasing position in the second direction AD2. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the engaging portion A213 is accommodated in the through hole A111a. The engaging portion A213 abuts against the wall of the through hole A111a of the operating member A100 in the first direction AD1. Thus, the engaging portion A213 restricts the sliding of the operating member A100 in the first direction AD1, thereby preventing the operating member A100 from sliding from the operating position to the waiting position. That is, the retaining member A210 holds the operating member A100 in the operating position. When the engaging portion A213 is accommodated in the through hole A111a, that is, when the retaining member A210 is in the retaining position, the user can press the unlocking portion A211 to drive the retaining member A210 to slide from the retaining position to the release position, causing the engaging portion A213 to move out of the through hole A111a in a direction away from the unlocking portion A211.

[0269] Please refer to the above. Figure 3 , Figure 4 and Figure 6 In one embodiment of this application, the housing A900 is further provided with a retaining hole A330, which communicates with the mounting cavity A310. Optionally, the retaining hole A330 is provided on the first cover A300. The unlocking part A211 passes through the retaining hole A330 along the second direction AD2. When the retainer A210 is in the retaining position, at least a portion of the unlocking part A211 protrudes from the retaining hole A330 out of the housing A900. Optionally, the shape of the retaining hole A330 is adapted to the orthographic projection shape of the unlocking part A211 on a plane perpendicular to the second direction AD2, so that the unlocking part A211 can pass through the retaining hole A330 and protrude out of the housing A900, and the retainer A210 can only slide along the second direction AD2.

[0270] refer to Figure 3 and Figure 9In one embodiment of this application, a socket cavity A350 is formed within the housing A900. The socket cavity A350 is used to fit around the outer periphery of the handlebar A610 of the trolley. The outer wall of the housing A900 protrudes outward, thereby forming a mounting cavity A310 communicating with the socket cavity A350. The mounting cavity A310 can be used to mount the operating member A100 and the retaining member A210. The mounting cavity A310 has a first cavity wall A311 and a second cavity wall A312 distributed along the second direction AD2, and a third cavity wall A313 located on the side away from the socket cavity A350. An operating hole A320 penetrates the third cavity wall A313 in the first direction AD1, and a retaining hole A330 penetrates the first cavity wall A311 along the second direction AD2. Optionally, the maximum distance between the first cavity wall A311 and the second cavity wall A312 in the second direction AD2 is greater than the height of the operating member A100 in the second direction AD2, and also greater than the height of the retaining member A210 in the second direction AD2. Therefore, the operating member A100 and the retaining member A210 can be inserted into the mounting cavity A310 from one side of the socket cavity A350. Optionally, the first cover A300 and the second cover A500 are assembled together along the first direction AD1, the mounting cavity A310 is located inside the first cover A300, the first cavity wall A311, the second cavity wall A312 and the third cavity wall A313 are formed on the inner side of the first cover A300, and part of the socket cavity A350 is located inside the first cover A300 and the other part is located inside the second cover A500.

[0271] Please refer to the above. Figures 3 to 5 and Figure 9In one embodiment of this application, at least one of the first cavity wall A311 and the second cavity wall A312 is provided with a first guide protrusion A340, which extends along a first direction AD1. The outer surface of the operating member A100 is provided with a second guide protrusion A160 that cooperates with and guides the first guide protrusion A340. During the movement of the operating member A100, the first guide protrusion A340 and the second guide protrusion A160 cooperate to limit the movement, ensuring that the operating member A100 always moves approximately along the first direction AD1. Optionally, the first guide protrusion A340 is strip-shaped, extending along the first direction AD1. Optionally, the operating member A100 also includes a first groove wall A151 and a second groove wall A152 that are opposite to each other along a second direction AD2, and the second guide protrusion A160 is disposed on the outer surface of at least one of the first groove wall A151 and the second groove wall A152 of the operating member A100. The first guide protrusion A340 includes a central guide strip A341, and the second guide protrusion A160 may include two central guide protrusions A161. The two central guide protrusions A161 are distributed on both sides of the centerline AI of the operating member A100 in the third direction AD3. After the operating member A100 is inserted into the mounting cavity A310, the central guide strip A341 is sandwiched between the two central guide protrusions A161. Optionally, the central guide strip A341 is disposed on the first cavity wall A311, and the central guide protrusions A161 are disposed on the outer surface of the first groove wall A151. The cooperation between the central guide strip A341 and the two central guide protrusions A161 restricts the movement of the central guide strip A341 in the third direction AD3, which helps to ensure the stability of the sliding of the operating member A100 in the first direction AD1. Optionally, the first guide protrusion A340 further includes two edge guide strips A342 located on both sides of the central guide strip A341 on the third direction AD3, and the second guide protrusion A160 further includes two edge guide protrusions A162 located on both sides of the two central guide protrusions A161 on the third direction AD3. The two edge guide protrusions A162 cooperate with the two edge guide strips A342 respectively, thereby further restricting the movement of the operating member A100 on the third direction AD3, and further improving the stability of the operating member A100 sliding on the first direction AD1.

[0272] Continue to refer to Figure 5The engaging portion A111 further includes a sliding hole A111b communicating with the through hole A111a in the first direction AD1. In the third direction AD3, the extension length of the sliding hole A111b is less than the extension length of the through hole A111a. Furthermore, in the third direction AD3, the extension length of the engaging portion A213 is less than the extension length of the through hole A111a but greater than the extension length of the sliding hole A111b. Therefore, the engaging portion A213 can enter and be accommodated in the through hole A111a but cannot enter the sliding hole A111b. Optionally, the sliding hole A111b extends along the first direction AD1, having a first end and a second end opposite each other in the first direction AD1. The first end communicates with the through hole A111a in the first direction AD1, and the second end is open. Figures 3 to 6 In the illustrated embodiment, the third direction AD3 is orthogonal to both the first direction AD1 and the second direction AD2. Those skilled in the art will understand that the orthogonality of the third direction AD3 to both the first direction AD1 and the second direction AD2 is merely exemplary, and they may choose other relative positions for the first direction AD1, the second direction AD2, and the third direction AD3 according to actual needs.

[0273] Continue to refer to Figure 6The retaining member A210 also includes a transition portion A212, which is disposed in the second direction AD2 between the unlocking portion A211 and the engaging portion A213. In the third direction AD3, the extension length of the transition portion A212 is no greater than the extension length of the sliding hole A111b and less than the extension length of the engaging portion A213. Optionally, the transition portion A212 is configured as a generally cylindrical structure and is coaxially disposed with the cylindrical engaging portion A213. Optionally, the engaging portion A213 forms an annular limiting surface A218 on the outer periphery of the transition portion A212. When the transition portion A212 passes through the sliding hole A111b, the engaging portion A213 is located on one side of the sliding hole A111b in the second direction AD2. At this time, the engaging portion A213 disengages from the through hole A111a, and the engaging portion A213 no longer obstructs the operation member A100 from moving from the operation position to the waiting operation position, and the retaining member A210 is in the released position. Optionally, when the transition portion A212 passes through the sliding hole A111b, the limiting surface A218 abuts against the operation members A100 on both sides of the sliding hole A111b in the third direction AD3 along the second direction AD2, that is, the engaging portion A213 abuts against the operation member A100 along the second direction AD2, thereby limiting the release position of the retaining member A210. Optionally, the limiting surface A218 is provided with a first wear-resistant layer, and the operation member A100 is provided with a second wear-resistant layer facing the limiting surface A218. When the operating member A100 moves along the first direction AD1, the first wear-resistant layer and the second wear-resistant layer can adhere to each other, reducing the wear of the operating member A100 and the retainer A210. The first wear-resistant layer and the second wear-resistant layer can be surface-treated to reduce the friction between the operating member A100 and the retainer A210.

[0274] Continue to refer to Figure 6 The retainer A210 is provided with a limiting part A214, which is located on one side of the engaging part A213 in the second direction AD2 and protrudes from the engaging part A213 in the first direction AD1.

[0275] In this embodiment, the limiting part A214 is configured as a roughly cubic shape, which protrudes circumferentially from the engaging part A213. Optionally, the limiting part A214 and the transition part A212 are disposed on both sides of the engaging part A213 in the second direction AD2. It is understood that the limiting part A214 and the unlocking part A211 are also disposed on both sides of the engaging part A213 in the second direction AD2. Optionally, when the engaging part A213 enters and is accommodated in the through hole A111a, the limiting part A214 abuts against the operating member A100 in the second direction AD2 to prevent the retaining member A210 from falling out of the through hole A111a, thereby limiting the retaining position of the retaining member A210.

[0276] Continue to refer to Figure 3 , Figure 5 and Figure 6In one embodiment of this application, the operating member A100 is provided with a hollow receiving groove A150, a through hole A111a and a sliding hole A111b communicating with the receiving groove A150, and a limiting part A214 disposed in the receiving groove A150. Optionally, the receiving groove A150 is formed between a first groove wall A151 and a second groove wall A152. Optionally, a snap-fit ​​part A111 is disposed on the first groove wall A151, specifically, the through hole A111a and the sliding hole A111b penetrate the first groove wall A151 along the second direction AD2. The limiting part A214 is accommodated in the receiving groove A150. When the retaining member A210 moves along the second direction AD2, the limiting part A214 moves in the receiving groove A150 along the second direction AD2, and the first groove wall A151 and the second groove wall A152 can be used to limit the stroke of the limiting part A214 in the second direction AD2. Optionally, when the engaging portion A213 enters and is accommodated in the through hole A111a, the limiting portion A214 abuts against the first groove wall A151 in the second direction AD2 to prevent the retaining member A210 from falling out of the through hole A111a, thereby limiting the retaining position of the retaining member A210. Optionally, when the engaging portion A213 disengages from the through hole A111a, that is, when the retaining member A210 is in the released position, the limiting portion A214 may abut against the second groove wall A152. Optionally, when the engaging portion A213 disengages from the through hole A111a and the transition portion A212 passes through the sliding hole A111b, the limiting surface A218 abuts against the first groove walls A151 on both sides of the sliding hole A111b in the second direction AD2. The first groove walls A151 on both sides of the sliding hole A111b in the second direction AD2 form a limit on both sides of the transition portion A212, preventing the retaining member A210 from tilting when the operating member A100 moves. That is, the engaging portion A213 can abut against the first groove wall A151. Optionally, the operating member A100 may not have the receiving groove A150. Correspondingly, the operating member A100 does not have the first groove wall A151 and the second groove wall A152. That is, the operating member A100 is set as a generally plate-shaped structure. In such an embodiment, the through hole A111a and the sliding hole A111b can be provided on the plate body of the operating member A100. When the engaging part A213 enters and is accommodated in the through hole A111a, the limiting part A214 can abut against one side of the plate body of the operating member A100 in the second direction AD2, thereby limiting the holding position of the retaining member A210. When the engaging part A213 disengages from the through hole A111a and the transition part A212 is located in the sliding hole A111b, the engaging part A213 can abut against one side of the plate body of the operating member A100 in the second direction AD2, thereby limiting the release position of the retaining member A210.

[0277] Please refer to the above. Figure 5 and Figure 6The operating member A100 is provided with a clearance hole A120. The clearance hole A120 is positioned opposite the engaging portion A111 in the second direction AD2 and extends along the first direction AD1. Optionally, the end of the clearance hole A120 away from the operating portion A101 is provided with an opening. Optionally, the clearance hole A120 is provided on the second groove wall A152, and the clearance hole A120 penetrates the second groove wall A152. Those skilled in the art will understand that the openings of the clearance hole A120 and the sliding hole A111b are intended to facilitate the assembly of the retainer A210 and the operating member A100. Optionally, the retainer A210 is also provided with a guide portion A216. Optionally, the guide portion A216 is configured as a generally cylindrical boss, which is coaxially arranged with the cylindrical engaging portion A213. When the operating member A100 and the guide portion A216 move relative to each other, the arc-shaped outer peripheral surface of the guide portion A216 contacts the inner wall of the clearance hole A120, which reduces the friction between the guide portion A216 and the inner wall of the clearance hole A120, and reduces the risk of jamming between the guide portion A216 and the clearance hole A120. The guide portion A216 is disposed in the clearance hole A120. Optionally, the boss has an extension length in the second direction AD2, which ensures that the guide portion A216 remains in the clearance hole A120 when the retainer A210 slides in the second direction AD2.

[0278] Continue to refer to Figure 6 Optionally, the guide portion A216 and the engaging portion A213 are respectively disposed on opposite sides of the limiting portion A214 in the second direction AD2, that is, the guide portion A216 and the engaging portion A213 are separated by the limiting portion A214. Optionally, in the third direction AD3, the width of the clearance hole A120 is slightly larger than the width of the guide portion A216. The cooperation between the clearance hole A120 and the guide portion A216 can guide the operating member A100 to slide along the generally first direction AD1, improving the stability of the movement of the operating member A100. Furthermore, the cooperation between the clearance hole A120 and the guide portion A216 can also guide the retaining member A210 to slide along the generally second direction AD2.

[0279] In this embodiment, the retaining member A210 sequentially includes, in the second direction AD2, an unlocking part A211, a transition part A212, an engaging part A213, a limiting part A214, and a guide part A216. The transition part A212, the engaging part A213, and the guide part A216 are coaxially arranged about the axis AX1. When the user presses the unlocking part A211, the pressure can be transmitted along the axis AX1, reducing the risk of the retaining member A210 tilting. When the operating member A100 slides from the waiting position to the operating position, the transition part A212 moves from the sliding hole A111b to the side of the through hole A111a away from the receiving groove A150, the guide part A216 slides relative to the clearance hole A120, the limiting part A214 slides in the receiving groove A150, and the engaging part A213 enters the through hole A111a from the receiving groove A150.

[0280] refer to Figure 9 and Figure 14 The operating mechanism A10 also includes an elastic element A220, which can drive the retaining element A210 to slide to the retaining position when the operating element A100 is in the operating position. Optionally, the elastic element A220 is disposed within the housing A900 and located on the side away from the retaining hole A330 along the second direction AD2. The elastic element A220 applies a pushing force to the retaining element A210, causing the retaining element A210 to tend to slide toward the retaining position. When the retaining element A210 is in the retaining position, at least a portion of the unlocking part A211 protrudes from the retaining hole A330. The user can drive the retaining element A210 to the release position by applying pressure to the unlocking part A211, such as pressing the unlocking part A211, to overcome the elastic force of the elastic element A220. In other embodiments, the operating mechanism A10 may not have an elastic element, and the second direction AD2 is the direction of gravity. When the operating element A100 is in the operating position, the retaining element A210 can be driven to slide to the retaining position by its own gravity.

[0281] Continue to refer to Figure 9In one embodiment of this application, the retainer A210 is provided with a mounting groove A215 extending along a second direction AD2. In the second direction AD2, one end of the mounting groove A215 is an opening at one end of a guide portion A216, and the other end of the mounting groove A215 (i.e., the bottom of the groove opposite the opening) forms an abutment surface A217. An elastic member A220 is partially disposed in the mounting groove A215, with one end abutting against the abutment surface A217 and the other end abutting against the housing A900, for example, against the first cover A300. The elastic member A220 continuously applies an elastic force to the abutment surface A217, causing the retainer A210 to tend to move toward a retaining position. The mounting groove A215 provides installation space for the elastic element A220. Furthermore, the inner wall of the mounting groove A215 limits the elastic element A220, ensuring it extends along the second direction AD2 and preventing bending. This guarantees that the thrust of the elastic element A220 is always distributed along the second direction AD2. Optionally, the mounting groove A215 and the guide portion A216 are coaxial about the axis AX1.

[0282] Please refer to the above. Figure 2 , Figure 3 , Figure 5 Figure 7 and Figure 11In one embodiment of this application, the trolley A1 further includes a drive member A410. Optionally, the drive member A410 is disc-shaped. The drive member A410 is pivotally disposed in the housing A900 via a pivot axis A420, and the drive member A410 is operably connected to the operating member A100. Sliding of the operating member A100 along the first direction AD1 can drive the drive member A410 to pivot about the pivot axis AX2. Optionally, the operating member A100 is provided with a drive portion A130, which extends away from the operating portion A101 along the first direction AD1. The end of the drive portion A130 away from the operating portion A101 is provided with a groove A131, which extends at least along a third direction AD3. The drive member A410 is provided with a connecting portion A411, which is fitted onto the groove A131. When the operating member A100 slides along the first direction AD1, the slide groove A131 abuts against the connecting portion A411, which rotates about the pivot axis A420 (more precisely, about the pivot axis AX2). Optionally, the extension length of the slide groove A131 in the first direction AD1 is approximately equal to the height of the connecting portion A411 in the first direction AD1. In such an embodiment, the connecting portion A411 translates only along the path defined by the extension direction of the slide groove A131 along the third direction AD3 relative to the slide groove A131. In other words, the connecting portion A411 slides only in the AD3 direction relative to the slide groove A131. Optionally, the extension length of the slide groove A131 in the first direction AD1 is greater than the height of the connecting portion A411 in the first direction AD1. In such an embodiment, relative to the slide groove A131, the connecting portion A411 can translate not only along the path defined by the extension of the slide groove A131 along the third direction AD3, but also along the path defined by the extension direction of the slide groove A131 along the first direction AD1. When the operating member A100 is in the operating position, in the first direction AD1, the connecting portion A411 and the lower edge of the slide groove A131 (refer to...) Figure 11 There is a gap between the two parts (in the direction of the movement). For the user, in the initial stage of pressing the operating member A100, the user will feel a "play" or "play" movement. In the "play" stage, the slide groove A131 has not yet pushed against the connecting part A411, and the sliding of the operating member A100 in the first direction AD1 will not drive the driving member A410 to pivot. The user will feel almost no pressing resistance. When the operating member A100 slides in the first direction AD1 until the lower edge of the slide groove A131 abuts against the connecting part A411, the sliding of the operating member A100 in the first direction AD1 begins to drive the driving member A410 to pivot, and the user will feel a certain pressing resistance.

[0283] Thus, the operating member A100 drives the driving member A410 to pivot about the pivot axis AX2. In this embodiment, the connecting part A411 is configured in a shape similar to a mushroom pin. Alternatively, the slide groove A131 and the connecting part A411 can also be configured with other structures, as long as the sliding of the operating member A100 in the first direction AD1 can drive the driving member A410 to pivot about the pivot axis AX2.

[0284] In one embodiment of this application, the trolley A1 further includes a traction member A802, which is connected to the locking member A800 and the driving member A410, so that the operating member A100 can be indirectly connected to the locking member A800 through the driving member A410 and the traction member A802, so as to indirectly drive the locking member A800 to move from the locked position to the unlocked position. Specifically, the driving member A410 is also provided with a connecting hole A412, which is connected to the traction member A802. Thus, the pivoting of the driving member A410 can pull the traction member A802, so as to pull the locking member A800 out of the first locking hole A701 through the traction member A802 (see reference). Figure 2 This allows the wheel seat A710 to pivot relative to the frame A600. Optionally, the towing component A802 is made of materials such as steel wire or nylon rope.

[0285] Please refer to the above. Figures 8 to 12 , Figure 8 A portion of the retainer A210 is shown in dashed lines; the dashed portion is... Figure 8 The parts invisible from the viewing angle are shown with dashed lines to clearly illustrate the relative positions of the cutting lines CC, DD, HH and the retainer A210. Figures 8 to 12 In the illustrated embodiment, the operating member A100 is in the ready-to-operate position, the holding member A210 is in the released position, and the driving member A410 is in the initial position. Combined with... Figure 2 It can be seen that, Figures 8 to 12 The operating mechanism A10 shown is in a non-operated state, and the locking member A800 of the trolley A1 is in the locked position. When the retaining member A210 is in the released position, the limiting part A214 abuts against the second groove wall A152. The second groove wall A152 restricts the limiting part A214 from moving away from the first groove wall A151 in the second direction AD2, so as to prevent the unlocking part A211 from being completely retracted into the housing A900 and to prevent the elastic member A220 from undergoing irreversible deformation. When the retaining member A210 is in the released position and the transition part A212 passes through the sliding hole A111b, the engaging part A213 abuts against the first groove wall A151. At this time, the abutment between the limiting part A214 and the second groove wall A152, and the abutment between the engaging part A213 and the first groove wall A151, limit the retaining member A210 in both directions of the second direction AD2, thereby keeping the retaining member A210 in the released position.

[0286] Please refer to the above. Figures 13 to 15 , Figure 13 A portion of the retainer A210 is shown in dashed lines; the dashed portion is... Figure 13 The parts invisible from the viewing angle are shown with dashed lines to clearly illustrate the relative positions of the cutting lines FF and GG and the retainer A210. Figures 13 to 15 In the embodiment shown, the operating member A100 is in the operating position, the holding member A210 is in the holding position, and the driving member A410 is in the working position. Figure 13 The operating mechanism A10 shown is in the state after being operated by the user, and the locking member A800 of the trolley A1 is in the unlocked position. When the retaining member A210 is in the retaining position, the limiting part A214 abuts against the first groove wall A151. The first groove wall A151 restricts the limiting part A214 from moving away from the second groove wall A152 in the second direction AD2, so as to prevent the retaining member A210 from disengaging from the operating member A100.

[0287] Please refer to the above. Figure 2 , Figure 10 and Figure 11 In one embodiment of this application, when the operating member A100 is in the ready-to-operate position, under the action of the reset member A801, the locking member A800 is in the locked position, such as... Figure 2 As shown. At this time, the traction member A802 does not apply tension to the driving member A410 or only applies a small tension to the driving member A410 (i.e., the traction member A802 is in a slightly tensioned state), and the driving member A410 is in the initial position. In the second direction AD2, the engaging part A213 is aligned with the sliding hole A111b, and under the action of the elastic member A220, the engaging part A213 abuts against the inner side of the first groove wall A151. At this time, the transition part A212 is located in the sliding hole A111b, thereby in the first direction AD1, the retaining member A210 does not restrict the sliding of the operating member A100, that is, the retaining member A210 is in the released position, as shown. Figure 9 and Figure 10 As shown. The guide portion A216 is at least partially located in the clearance hole A120, as... Figure 11 As shown.

[0288] For ease of description, the following text will... Figures 8 to 12 The state shown is defined as the initial state of the operating mechanism A10. The direction of movement of the operating member A100 from the unoperated position to the operating position in the first direction AD1 is defined as the positive direction of the first direction AD1, and the direction of movement of the operating member A100 from the operating position to the unoperated position in the first direction AD1 is defined as the negative direction of the first direction AD1. For example, in Figure 10In this context, vertically upward is the positive direction of the first direction AD1, and vertically downward is the negative direction of the first direction AD1. The direction in which the retaining member A210 moves from the holding position to the release position in the second direction AD2 is defined as the positive direction of the second direction AD2, and the direction in which the retaining member A210 moves from the release position to the holding position in the second direction AD2 is defined as the negative direction of the second direction AD2. For example, in... Figure 9 In the diagram, the vertical direction upward is the positive direction of the second direction AD2, and the vertical direction downward is the negative direction of the second direction AD2.

[0289] Please refer to the above. Figure 2 , Figures 13 to 15 In one embodiment of this application, for example, the user presses the operating part A101 to drive the operating member A100 from the position to be operated (e.g., Figures 8 to 12 Slide to the operating position (as shown) Figures 13 to 15 As shown), the slide groove A131 pushes against the connecting part A411, driving the driving member A410 to pivot from the initial position to the working position. The pivoting of the driving member A410 pulls the locking member A800 out of the first locking hole A701 through the traction member A802, and the locking member A800 enters the unlocked position. At this time, the traction member A802 applies a pulling force to the driving member A410, which is approximately equal to the elastic force provided by the reset member A801. As a result, the driving member A410 has a tendency to return to the initial position. Through the pushing cooperation of the slide groove A131 and the connecting part A411, the operating member A100 has a tendency to slide back to the operating position along the negative direction of the first direction AD1. In the second direction AD2, the engaging part A213 aligns with the through hole A111a. Under the action of the elastic member A220, the engaging part A213 enters the through hole A111a, and the limiting part A214 abuts against the first groove wall A151. That is, the retaining member A210 slides from the release position to the retaining position along the negative direction of the second direction AD2. Figure 14 As shown. In the first direction AD1, the operating member A100 abuts against the engaging portion A213, which prevents the operating member A100 from moving from the operating position to the waiting position, thereby holding the operating member A210 in the operating position. Through the pushing engagement of the slide groove A131 and the connecting portion A411, the operating member A100 holds the driving member A410 in the working position. The driving member A410 holds the locking member A800 in the unlocked position via the traction member A802. The guide portion A216 is at least partially located in the clearance hole A120, as shown... Figure 14 and Figure 15 As shown.

[0290] For ease of description, the following text will... Figures 13 to 15 The state shown is defined as the working state of the operating mechanism A10.

[0291] Refer again Figure 9 Optionally, when the operating mechanism A10 is in its initial state, a gap is provided between the limiting part A214 and the first groove wall A151. This can be achieved by adjusting the thickness of the limiting part A214 in the second direction AD2 and / or the distance between the second groove wall A152 and the first groove wall A151 in the second direction AD2. By setting this gap, the pressing stroke of the elastic element A220 can be adjusted, preventing the elastic element A220 from being pressed, which could lead to a shortened service life or damage.

[0292] Comparison Reference Figure 10 and Figure 11 In this embodiment, the snap-fit ​​part A111 is disposed on the first groove wall A151, and the drive part A130 is disposed on the second groove wall A152. When the operating mechanism A10 is in the working state, the stress exerted on the operating member A100 by the drive member A410 and the stress exerted on the operating member A100 by the retaining member A210 are respectively applied to different positions of the operating member A100, thereby avoiding stress concentration on the operating member A100, preventing stress fatigue of the material of the operating member A100, and extending the service life of the operating member A100.

[0293] refer to Figure 12In one embodiment of this application, a guide groove A140 is provided in the receiving groove A150 of the operating member A100, the guide groove A140 extending along a first direction AD1. Optionally, the guide groove A140 is formed by two guide ribs A141 extending along the first direction AD1. Each guide rib A141 is connected to at least one of the first groove wall A151 and the second groove wall A152. A limiting portion A214 is received in the guide groove A140 and can slide relative to it along the guide groove A140. Optionally, the width of the guide groove A140 in the third direction AD3 is not less than the width of the limiting portion A214 in the third direction AD3, thereby limiting the movement of the guide groove A140 (i.e., the operating member A100) in the third direction AD3. Optionally, when the operating member A100 moves along the first direction AD1, the cooperation between the limiting part A214 and the guide groove A140 restricts the movement of the operating member A100 in the third direction AD3, and also helps to ensure the stability of the sliding of the operating member A100 in the first direction AD1. For example, based on the pushing cooperation of the slide groove A131 and the connecting part A411, the force of the connecting part A411 acting on the slide groove A131 has a component along the third direction AD3, which makes the operating member A100 tend to move in the third direction AD3. If the operating member A100 moves in the third direction AD3, it may cause the operating member A100 to rotate on, for example, the plane formed by the first direction AD1 and the third direction AD3, so that the sliding of the operating member A100 in the first direction AD1 will be hindered, or even "jammed" in the receiving groove A150, and unable to slide in the first direction AD1. The cooperation between the limiting part A214 and the guide groove A140 restricts the movement of the operating member A100 in the third direction AD3, allowing the operating member A100 to slide only in the first direction AD1. This avoids the aforementioned "obstruction" and "jamming," making the sliding of the operating member A100 in the first direction AD1 smoother. Optionally, two guide ribs A141 are respectively provided on the first groove wall A151 and the second groove wall A152. The projections of the two guide ribs A141 along the third direction AD3 overlap, or the distance between the projections of the two guide ribs A141 along the third direction AD3 in the second direction AD2 is less than the thickness of the limiting part A214 in the second direction AD2. In such an embodiment, when the retaining member A210 moves along the second direction AD2, the cooperation between the limiting part A214 and the guide groove A140 restricts the movement of the retaining member A210 in the third direction AD3, which helps to ensure the stability of the sliding of the retaining member A210 in the second direction AD2. Optionally, two guide ribs A141 are provided on one of the first groove wall A151 and the second groove wall A152, and the extension length of the two guide ribs A141 along the second direction AD2 is greater than the difference between the width of the receiving groove A150 in the second direction AD2 and the thickness of the limiting part A214 in the second direction AD2.In such an embodiment, when the retainer A210 moves along the second direction AD2, the engagement of the limiting part A214 and the guide groove A140 restricts the movement of the retainer A210 in the third direction AD3, which helps to ensure the stability of the retainer A210 sliding in the second direction AD2.

[0294] The following is combined Figures 8 to 15 The operation mode of the operating mechanism A10 according to one embodiment of this application is described.

[0295] like Figures 8 to 12 As shown, the operating mechanism A10 is in the initial state. At this time, the operating member A100 is in the ready-to-operate position, the holding member A210 is in the released position, the driving member A410 is in the initial position, the locking member A800 is in the locked position, the pivoting of the wheel seat A710 relative to the frame A600 is locked, and the wheel A720 is set as a directional wheel.

[0296] When it is necessary to release the pivoting of the wheel seat A710 relative to the frame A600, the user presses the operating part A101 of the operating member A100, driving the operating member A100 from the operating position (e.g., in the positive direction of the first direction AD1) along the direction of the first direction AD1. Figures 8 to 12 (As shown) Slide to the operating position. As described above, the sliding of the operating member A100 drives the locking member A800 to the unlocked position via the driving member A410 and the traction member A802, thereby unlocking the pivoting of the wheel seat A710 relative to the frame A600, and the wheel A720 is set as a caster. Under the action of the elastic member A220, the retaining member A210 slides from the released position to the retaining position along the negative direction of the second direction AD2. The sliding tendency of the operating member A100 along the negative direction of the first direction AD1 caused by the reset member A801 ​​is restricted by the retaining member A210, which holds the operating member A100 in the operating position. The pushing cooperation of the slide groove A131 and the connecting part A411 ultimately causes the locking member A800 to remain in the unlocked position. At this point, the operating mechanism A10 enters the working state.

[0297] When it is necessary to relock the pivoting of wheel seat A710 relative to frame A600, the user presses the unlocking part A211 of retainer A210 (for comparison). Figure 8 and Figure 13 ), so that the retaining member A210 slides towards the release position along the positive direction of the second direction AD2 until the limiting part A214 abuts against the second groove wall A152 (see reference). Figure 9The retainer A210 slides to the release position. At this time, in the first direction AD1, the wall of the through hole A111a disengages from the engaging part A213, and the retainer A210 no longer restricts the sliding of the operating member A100 in the first direction AD1. The user pushes the trolley A1 to rotate the wheel seat A710 until the first locking hole A701 on the wheel seat A710 aligns with the second locking hole A601 on the frame A600. Under the action of the reset member A801, the locking member A800 enters the first locking hole A701 and enters the locked position. The pulling force applied to the drive member A410 by the traction member A802 drives the drive member A410 to pivot from the working position to the initial position. Through the pushing engagement of the slide groove A131 and the connecting part A411, the pivoting of the drive member A410 drives the operating member A100 to slide from the operating position to the waiting position along the negative direction of the first direction AD1. At this point, the operating mechanism A10 returns to its initial state.

[0298] In the operating mechanism A10 according to the embodiments of this application, by cooperating with the retainer A210 and the operating member A100, the user can keep the operating member A100 in the operating position without continuously applying external force to it, thereby continuously providing a holding force to the target device operably connected to the operating member A100 to keep the target device in a certain characteristic position, such as keeping the locking member A800 of the trolley A1 in the unlocked position.

[0299] refer to Figures 1 to 2 Embodiments of this application provide an operating mechanism A10 for a trolley A1. Figure 1 and Figure 2In the illustrated embodiment, the trolley A1 includes a first element, a second element, a locking member A800, and an operating mechanism A10. The second element is selectively movably or fixedly connected to the first element. The operating mechanism A10 is disposed on the first element, and the user switches the first element and the second element from a fixed connection to a movable connection by operating the operating mechanism A10. Optionally, the operating mechanism A10 includes an operating member A100, which the user applies external force to, driving the operating member A100 to move from a waiting position to an operating position, thereby switching the first element and the second element from a fixed connection to a movable connection. The locking member A800 is connected to the operating member A100, and the movement of the operating member A100 from the waiting position to the operating position drives the locking member A800 to move from a locked position to an unlocked position. When the locking member A800 is in the locked position, it simultaneously engages the first element and the second element, fixing them together. At this time, the locking member A800 locks the relative movement between the first element and the second element. When locking member A800 is in the unlocked position, locking member A800 releases its engagement with at least one of the first and second elements, and the first and second elements switch to a movable connection. At this time, locking member A800 releases the relative movement between the first and second elements.

[0300] In one embodiment of this application, the trolley A1 includes a frame A600, wheel seats A710, and wheels A720, wherein the frame A600 and wheel seats A710 are selectively pivotally or fixedly connected to each other, and the wheels A720 are pivotally connected to the wheel seats A710. When the frame A600 and wheel seats A710 are pivotally connected, the wheels A720 are configured as omnidirectional wheels; when the frame A600 and wheel seats A710 are fixedly connected, the wheels A720 are configured as directional wheels. Figure 1In the illustrated embodiment, wheel A720 is the rear wheel A700, but this is merely exemplary. In other embodiments, wheel A720 may be any wheel A720 of the trolley A1, for example, wheel A720 may be the front wheel or wheel A720 may include both the front and rear wheels A700. Optionally, the first element is the frame A600, and the second element is the wheel seat A710. The wheel seat A710 has a first locking hole A701, and the frame A600 has a second locking hole A601. In a direction perpendicular to the pivot axis of the wheel seat A710, both the second locking hole A601 and the first locking hole A701 are spaced apart from the pivot axis. Locking member A800 is movably connected to the frame A600. Optionally, locking member A800 is slidably connected to the second locking hole A601. In the moving direction of the locking member A800, when the second locking hole A601 and the first locking hole A701 are aligned with each other, the locking member A800 simultaneously inserts into and engages with the first locking hole A701 and the second locking hole A601, so that the frame A600 and the wheel seat A710 are fixedly connected and cannot pivot relative to each other. When the locking member A800 disengages from the first locking hole A701, the frame A600 and the wheel seat A710 are pivotally connected and can pivot relative to each other. In other embodiments, the locking member A800 may also be movably connected to the wheel seat A710. Optionally, the locking member A800 may be slidably connected to the first locking hole A701. In this case, the locking member A800 may be inserted into or disengaged from the second locking hole A601, so that the frame A600 and the wheel seat A710 are fixedly connected or pivotally connected. In other embodiments, the locking member A800 may also disengage simultaneously from the first locking hole A701 and the second locking hole A601 to allow the frame A600 to pivot relative to the wheel seat A710.

[0301] In one embodiment of this application, the operating mechanism A10 is disposed on the frame A600, which includes a handlebar A610. The operating mechanism A10 may be disposed on the handlebar A610, for example. Optionally, depending on actual needs, the operating mechanism A10 may be disposed at any position on the trolley A1. The operating member A100 is connected to the locking member A800. By operating the operating member A100, the user moves the operating member A100 from the waiting position to the operating position, thereby driving the locking member A800 to disengage from at least one of the first locking hole A701 and the second locking hole A601. This drives the locking member A800 from the locked position to the unlocked position, thereby releasing the relative movement between the frame A600 and the wheel seat A710. At this time, the wheel seat A710 can pivot relative to the frame A600, and the wheel A720 is configured as a swivel wheel relative to the frame A600 to facilitate the steering of the trolley A1.

[0302] In one embodiment of this application, the trolley A1 further includes a first reset member A801. The first reset member A801 ​​drives the locking member A800 from the unlocked position to the locked position and drives the operating member A100 from the operating position to the ready-to-operate position. Optionally, in this embodiment, the first reset member A801 ​​is disposed between the locking member A800 and the frame A600. The first reset member A801 ​​continuously applies a spring force to the locking member A800, causing the locking member A800 to tend to slide towards the first locking hole A701. Optionally, the first reset member A801 ​​can be a spring, torsion spring, or spring sheet, etc. In other words, when the operating member A100 no longer applies force to the locking member A800, under the action of the first reset member A801, the locking member A800 can automatically return to the first locking hole A701 to move from the unlocked position to the locked position, thereby locking the relative movement between the frame A600 and the wheel seat A710. At this time, wheel seat A710 cannot pivot relative to frame A600, and wheel A720 is positioned as a directional wheel relative to frame A600. Simultaneously, since locking member A800 is connected to operating member 11, first reset member A801 ​​directly drives locking member A800 from the unlocked position to the locked position, and indirectly drives operating member 11 from the operating position to the ready-to-operate position. In other embodiments, first reset member A801 ​​may be connected to operating member 800 instead of locking member A800. First reset member A801 ​​directly drives operating member 11 from the operating position to the ready-to-operate position, and indirectly drives locking member A800 from the unlocked position to the locked position.

[0303] Those skilled in the art will understand that although the stroller A1 shown in the accompanying drawings is a children's stroller, this is merely exemplary, and stroller A1 can be any stroller, such as a camping trailer, shopping cart, etc., and this application is not limited thereto. Furthermore, although the locking element A800 shown in the accompanying drawings is used to lock and release relative rotation between the wheel seat A710 and the frame A600, this is merely exemplary. Optionally, the locking element A800 can also be a locking element for other devices on the stroller, such as a locking element for the front wheel steering locking mechanism, a locking element for the wheel braking mechanism, a locking element for the handlebar extension mechanism, a locking element for the handlebar reversing mechanism, a locking element for the frame folding mechanism, etc., and this application is not limited thereto. Those skilled in the art will understand that in embodiments where the locking element is used for other devices on the stroller, the first element and the second element are correspondingly components associated with those other devices.

[0304] For ease of description, the directional terms AD1, AD2, and AD3 are introduced in this application. Unless explicitly defined, the term "direction" in these directional terms should be interpreted broadly, and may include two directions extending along any imaginary straight line or curve and facing opposite directions. In this application, such two directions facing opposite directions are expressed as "positive direction" and "opposite direction." For example, in this application, "sliding along the first direction AD1" means that one can slide either along the positive direction of the first direction AD1 or along the opposite direction of the first direction AD1.

[0305] Please refer to the above. Figures 3 to 6In one embodiment of this application, the operating mechanism A10 includes an operating member A100, a retaining member A210, and a housing A900. Both the operating member A100 and the retaining member A210 are movable relative to the housing A900. The operating member A100 can move relative to the housing A900 along a first direction AD1 between a waiting position and an operating position, and the retaining member A210 can move relative to the housing A900 along a second direction AD2 between a holding position and a release position. The housing A900 is provided with an operating hole A320, and the operating member A100 is movably disposed in the operating hole A320. Optionally, the operating member A100 is provided with an operating portion A101. When the operating member A100 is in the waiting position, at least a portion of the operating portion A101 protrudes from the operating hole A320 for user operation, driving the operating member A100 to move from the waiting position to the operating position along the positive direction of the first direction AD1. In this embodiment, the operating portion A101 is adapted for user pressing. Optionally, the operating member A100 is slidably disposed in the operating hole A320 and is capable of sliding along the first direction AD1. The sliding trajectory of the operating member A100 passes through at least the pending operation position and the operation position, that is, the operating member A100 is slidably connected to the housing A900. Optionally, the shape of the operating hole A320 is adapted to the orthographic projection shape of the operating part A101 on the plane perpendicular to the first direction AD1. Therefore, the operating part A101 can protrude from the housing A900 along the first direction AD1, and the operating hole A320 can limit the operating member A100, so that the operating member A100 can only slide along the first direction AD1. The housing A900 is also provided with a retaining hole A330, and the retaining member A210 is movably disposed in the retaining hole A330. Optionally, the retainer A210 is slidably disposed in the retaining hole A330 and is capable of sliding along the second direction AD2. The sliding trajectory of the retainer A210 passes through at least the retaining position and the releasing position, that is, the retainer A210 is slidably connected to the housing A900. Optionally, in this embodiment, the retainer A210 is provided with an unlocking part A211. When the retainer A210 is in the retaining position, at least a portion of the unlocking part A211 protrudes from the retaining hole A330 for the user to press, thereby moving the retainer A210 from the retaining position to the releasing position along the positive direction of the second direction AD2. Optionally, the shape of the retaining hole A330 is adapted to the orthographic projection shape of the unlocking part A211 on a plane perpendicular to the second direction AD2. Therefore, the unlocking part A211 can protrude from the housing A900 along the second direction AD2, and the retaining hole A330 can limit the retainer A210, so that the retainer A210 can only slide along the second direction AD2.

[0306] Optionally, refer to Figures 3 to 6The housing A900 includes a first cover A300 and a second cover A500, which are fastened together to form the housing A900, and a hollow internal structure is formed within the housing A900. Optionally, the first cover A300 and the second cover A500 are fastened together along a first direction AD1. Optionally, an operating hole A320 is provided on the first cover A300. Optionally, a retaining hole A330 is provided on the first cover A300.

[0307] exist Figures 3 to 6 In the illustrated embodiment, both the first direction AD1 and the second direction AD2 are straight lines, and the first direction AD1 and the second direction AD2 are orthogonal. Those skilled in the art will understand that the orthogonality of the first direction AD1 and the second direction AD2 is merely exemplary, and they can choose other intersection angles for the first direction AD1 and the second direction AD2 according to actual needs.

[0308] In this disclosure, for ease of description, the direction in which the operating member A100 moves from the position to the operating position in the first direction AD1 is defined as the positive direction of the first direction AD1, and the direction in which the operating member A100 moves from the operating position to the position to the operating position in the first direction AD1 is defined as the negative direction of the first direction AD1. For example, in Figure 10 In this context, vertically upward is the positive direction of the first direction AD1, and vertically downward is the opposite direction of the first direction AD1. The direction in which the retaining member A210 moves from the holding position to the release position in the second direction AD2 is defined as the positive direction of the second direction AD2, and the direction in which the retaining member A210 moves from the release position to the holding position in the second direction AD2 is defined as the opposite direction of the second direction AD2. For example, in... Figure 9 In the diagram, the vertical direction upward is the positive direction of the second direction AD2, and the vertical direction downward is the opposite direction of the second direction AD2.

[0309] Optionally, when the operating member A100 is in the ready-to-operate position (e.g., when the user has not yet pressed the operating part A101), the retaining member A210 is in the released position, and there is no connection between the retaining member A210 and the operating member A100 that can restrict the sliding of the operating member A100. At this time, the retaining member A210 does not restrict the sliding of the operating member A100 along the first direction AD1, and the operating member A100 can move from the ready-to-operate position to the operating position at least along the positive direction of the first direction AD1. When the operating member A100 slides from the waiting position to the operating position along the positive direction of the first direction AD1 (for example, the position reached by the operating member A100 after the user presses the operating part A101 to drive the operating member A100 to slide), and when the retaining member A210 slides from the release position to the retaining position along the opposite direction of the second direction AD2, a connection relationship is established between the retaining member A210 and the operating member A100 that can restrict the sliding of the operating member A100. For example, the retaining member A210 abuts against the operating member A100 in the first direction AD1, and the retaining member A210 blocks the operating member A100 from sliding in the first direction AD1, for example, it blocks the operating member A100 from sliding from the operating position to the waiting position along the opposite direction of the first direction AD1.

[0310] refer to Figure 3 , Figure 5 and Figure 6In one embodiment of this application, the operating member A100 includes a receiving portion A111, and the retaining member A210 includes an engaging portion A213. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the receiving portion A111 and the engaging portion A213 abut against each other in the first direction AD1, thereby preventing the operating member A100 from moving from the operating position to the waiting-to-operate position in the opposite direction of the first direction AD1, and the operating member A100 is held in the operating position. Optionally, at this time, the engaging portion A213 is housed in the receiving portion A111 in the second direction AD2. When the receiving portion A111 and the engaging portion A213 no longer abut against each other in the first direction AD1, that is, when the operating member A100 and the retaining member A210 no longer abut against each other in the first direction AD1, the retaining member A210 is in the released position, and the operating member A100 can move between the operating position and the waiting-to-operate position along the first direction AD1. Optionally, the engaging portion A213 disengages from the receiving portion A111 in the second direction AD2. In one embodiment of this application, the receiving portion A111 includes a through hole A111a. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the engaging portion A213 can enter and be accommodated in the through hole A111a in the opposite direction of the second direction AD2. The wall of the through hole A111a abuts against the engaging portion A213 in the first direction AD1, thereby restricting the sliding of the operating member A100 in the first direction AD1 and preventing the operating member A100 from moving from the operating position to the waiting position in the opposite direction of the first direction AD1. That is, the retaining member A210 holds the operating member A100 in the operating position. Optionally, the engaging portion A213 is configured as a generally cylindrical structure, and the through hole A111a is generally a circular hole. Optionally, part of the edge of this circular hole is cut off, and the edge of this circular hole is set with a superior arc.

[0311] Continue to refer to Figure 5The receiving part A111 (also called the engaging part A111) also includes a sliding hole A111b communicating with the through hole A111a in the first direction AD1. The engaging part A213 can enter and be accommodated in the through hole A111a along the second direction AD2, but cannot enter the sliding hole A111b along the second direction AD2. It can be understood that when the engaging part A213 and the sliding hole A111b are opposite each other in the second direction AD2, the projection surface of the engaging part A213 on the plane perpendicular to the second direction AD2 only partially overlaps with the projection surface of the sliding hole A111b on the plane perpendicular to the second direction AD2, while the projection surface of the non-engaging part A213 on the plane perpendicular to the second direction AD2 completely overlaps with the projection surface of the sliding hole A111b on the plane perpendicular to the second direction AD2. Therefore, the engaging part A213 cannot enter the sliding hole A111b along the second direction AD2. Optionally, in the third direction AD3, the extension length of the sliding hole A111b is less than the extension length of the through hole A111a, and in the third direction AD3, the extension length of the engaging portion A213 is less than the extension length of the through hole A111a but greater than the extension length of the sliding hole A111b. Therefore, the engaging portion A213 can enter and be accommodated in the through hole A111a but cannot enter the sliding hole A111b. Optionally, the sliding hole A111b extends along the first direction AD1 to allow the operating member A100 to slide relative to the retaining member A210 along the first direction AD1. Optionally, the sliding hole A111b has a first end and a second end opposite each other in the first direction AD1, the first end communicating with the through hole A111a in the first direction AD1, and the second end being an opening. Figures 3 to 6 In the illustrated embodiment, the third direction AD3 is a straight line and is orthogonal to both the first direction AD1 and the second direction AD2. Those skilled in the art will understand that the orthogonality of the third direction AD3 to both the first direction AD1 and the second direction AD2 is merely exemplary, and they can choose other relative positions for the first direction AD1, the second direction AD2, and the third direction AD3 according to actual needs.

[0312] Optionally, in the second direction AD2, the unlocking part A211 is located on one side of the engaging part A213. Optionally, the unlocking part A211 protrudes from the outside of the operating member 111 through the through hole 111 and the sliding hole A111b. When the engaging part A213 is received in the through hole A111a, that is, when the retaining member A210 is in the holding position, the user presses the unlocking part A211 to drive the engaging part A213 to disengage from the through hole A111a, thereby driving the retaining member A210 to slide from the holding position to the release position.

[0313] Continue to refer to Figure 6The retaining member A210 is further provided with a transition portion A212, which is disposed in the second direction AD2 between the unlocking portion A211 and the engaging portion A213. The transition portion A212 can enter the sliding hole A111b. Optionally, the engaging portion A213 protrudes from the transition portion A212 in a plane perpendicular to the second direction AD2. Optionally, in the third direction AD3, the extension length of the transition portion A212 is not greater than the extension length of the sliding hole A111b and is less than the extension length of the engaging portion A213. Optionally, the transition portion A212 is configured as a generally cylindrical structure and is coaxially disposed with the cylindrical engaging portion A213. Optionally, the engaging portion A213 forms an annular limiting surface A218 on the outer periphery of the transition portion A212. When the transition portion A212 passes through the sliding hole A111b, the engaging portion A213 is located on one side of the sliding hole A111b in the second direction AD2. At this time, the engaging portion A213 disengages from the through hole A111a and is located at a position offset from the through hole A111a in the second direction AD2; the retaining member A210 is in the released position, and the engaging portion A213 does not obstruct the operating member A100 from moving from the waiting position to the operating position along the positive direction of the first direction AD1. Optionally, when the transition portion A212 passes through the sliding hole A111b, the limiting surface A218 abuts against the operating members A100 on both sides of the sliding hole A111b in the third direction AD3 along the second direction AD2, that is, the engaging portion A213 abuts against the operating member A100 along the second direction AD2, thereby holding the retaining member A210 in the released position. Optionally, the limiting surface A218 is provided with a first wear-resistant layer, and the operating member 111 is provided with a second wear-resistant layer facing the limiting surface A218. When the operating member A100 moves along the first direction AD1, the first wear-resistant layer and the second wear-resistant layer can fit together, reducing wear between the operating member A100 and the retainer A210. The first wear-resistant layer and the second wear-resistant layer can be surface-treated to reduce the friction between the operating member A100 and the retainer A210.

[0314] Continue to refer to Figure 6 The retaining member A210 is provided with a limiting portion A214, which is located on one side of the engaging portion A213 in the second direction AD2 and protrudes from the engaging portion A213 in a plane intersecting the second direction AD2. Optionally, the limiting portion A214 protrudes from the engaging portion A213 in a plane perpendicular to the second direction AD2.

[0315] In this embodiment, the limiting part A214 is configured as a roughly cubic shape, which protrudes circumferentially from the engaging part A213. Optionally, the limiting part A214 and the transition part A212 are provided on both sides of the engaging part A213 in the second direction AD2, thereby the limiting part A214 and the unlocking part A211 are also provided on both sides of the engaging part A213 in the second direction AD2. Optionally, when the engaging part A213 enters and is received in the through hole A111a, the limiting part A214 abuts against the operating member A100 in the second direction AD2 to prevent the retaining member A210 from falling out of the through hole A111a, thereby holding the retaining member A210 in the holding position. Optionally, when the engaging part A213 enters and is accommodated in the through hole A111a, the projection surface of the limiting part A214 on the plane perpendicular to the second direction AD2 only partially overlaps with the projection surface of the through hole A111a on the plane perpendicular to the second direction AD2, while the projection surface of the non-limiting part A214 on the plane perpendicular to the second direction AD2 completely overlaps with the projection surface of the through hole A111a on the plane perpendicular to the second direction AD2. Therefore, the limiting part A214 cannot enter the through hole A111a along the second direction AD2, but can only abut against the operating member A100.

[0316] Continue to refer to Figure 3 , Figure 5 and Figure 6In one embodiment of this application, the operating member A100 is provided with a hollow receiving groove A150, a through hole A111a and a sliding hole A111b communicating with the receiving groove A150, and a limiting part A214 disposed in the receiving groove A150. Optionally, the operating member A100 further includes a first groove wall A151 and a second groove wall A152 opposite to each other, and the receiving groove A150 is formed between the first groove wall A151 and the second groove wall A152. Optionally, the first groove wall A151 and the second groove wall A152 are disposed opposite to each other in the second direction AD2. Optionally, a receiving part A111 is disposed on the first groove wall A151, and optionally, the through hole A111a and the sliding hole A111b penetrate the first groove wall A151 along the second direction AD2. The limiting part A214 is accommodated in the receiving groove A150. When the retaining member A210 moves along the second direction AD2, the limiting part A214 moves along the second direction AD2 in the receiving groove A150. The first groove wall A151 and the second groove wall A152 can be used to limit the travel of the limiting part A214 in the second direction AD2. Optionally, when the engaging part A213 enters and is accommodated in the through hole A111a, the limiting part A214 abuts against the first groove wall A151 in the second direction AD2 to prevent the retaining member A210 from falling out of the through hole A111a, thereby holding the retaining member A210 in the holding position. Optionally, when the engaging part A213 disengages from the through hole A111a, that is, when the retaining member A210 is in the released position, the limiting part A214 can abut against the second groove wall A152 in the second direction AD2. Optionally, when the engaging portion A213 disengages from the through hole A111a and the transition portion A212 passes through the sliding hole A111b, the limiting surface A218 abuts against the first groove walls A151 on both sides of the sliding hole A111b in the third direction AD3. The first groove walls A151 on both sides of the sliding hole A111b in the third direction AD3 form a limit on both sides of the transition portion A212 in the third direction AD3, preventing the retaining member A210 from tilting when the operating member A100 moves in the first direction AD1. That is, the engaging portion A213 can abut against the first groove wall A151. Optionally, the operating member A100 may not have the receiving groove A150. Correspondingly, the operating member A100 does not have the first groove wall A151 and the second groove wall A152. That is, the operating member A100 is set as a generally plate-shaped structure. In such an embodiment, the through hole A111a and the sliding hole A111b can be provided on the plate body of the operating member A100. When the engaging part A213 enters and is accommodated in the through hole A111a, the limiting part A214 can abut against one side of the plate body of the operating member A100 in the second direction AD2, thereby keeping the retaining member A210 in the retaining position. When the engaging part A213 disengages from the through hole A111a and the transition part A212 is located in the sliding hole A111b, the engaging part A213 can abut against one side of the plate body of the operating member A100 in the second direction AD2.

[0317] refer to Figure 9 and Figure 14 The limiting part A214 moves relative to the operating member A100 along the second direction AD2 between the holding position and the release position with the holding member A210, so that the receiving groove A150 needs to provide space for the limiting part A214 to move in the second direction AD2. Therefore, the thickness of the limiting part A214 in the second direction AD2 will be less than the distance between the second groove wall A152 and the first groove wall A151 in the second direction AD2.

[0318] refer to Figure 12In one embodiment of this application, the receiving groove A150 of the operating member A100 is provided with a guide groove A140, which extends along a first direction AD1. Optionally, the guide groove A140 includes two guide ribs A141 located within the receiving groove A150 and spaced apart along a third direction AD3, each guide rib A141 extending along the first direction AD1. Each guide rib A141 is connected to at least one of the first groove wall A151 and the second groove wall A152. A limiting portion A214 is received in the guide groove A140, that is, the limiting portion A214 is located between the two guide ribs A141 and can slide relative to each other along the guide ribs A141 in the first direction AD1 and the second direction AD2. Optionally, the distance between the two guide ribs A141 in the third direction AD3 (i.e., the width of the guide groove A140 in the third direction AD3) is not less than the width of the limiting part A214 in the third direction AD3, thereby limiting the movement of the guide groove A140 in the third direction AD3. Optionally, when the operating member A100 moves along the first direction AD1, the cooperation between the limiting part A214 and the guide groove A140 (specifically the two guide ribs A141) limits the movement of the operating member A100 in the third direction AD3, and also helps to ensure the stability of the sliding of the operating member A100 in the first direction AD1. Optionally, two guide ribs A141 are respectively disposed on the first groove wall A151 and the second groove wall A152. The projection planes of the two guide ribs A141 onto the plane perpendicular to the third direction AD3 have an overlapping area, or the distance between the projection planes of the two guide ribs A141 onto the second direction AD2 is less than the thickness of the limiting portion A214 onto the second direction AD2. In such an embodiment, when the retainer A210 moves along the second direction AD2, the cooperation between the limiting portion A214 and the guide groove A140 (specifically, the two guide ribs A141) restricts the movement of the retainer A210 onto the third direction AD3, which helps to ensure the stability of the retainer A210 sliding along the second direction AD2. Optionally, two guide ribs A141 are disposed on one of the first groove wall A151 and the second groove wall A152. The extension length of the two guide ribs A141 along the second direction AD2 is greater than the difference between the width of the receiving groove A150 in the second direction AD2 and the thickness of the limiting portion A214 in the second direction AD2. In such an embodiment, when the retainer A210 moves along the second direction AD2, the cooperation between the limiting portion A214 and the guide groove A140 (specifically the two guide ribs A141) restricts the movement of the retainer A210 in the third direction AD3, which helps to ensure the stability of the retainer A210 sliding in the second direction AD2.

[0319] Please refer to the above. Figure 5 and Figure 6In one embodiment of this application, the operating member A100 is provided with a clearance hole A120. The clearance hole A120 is positioned opposite the receiving portion A111 in the second direction AD2 and extends along the first direction AD1. The clearance hole A120 allows the operating member A100 to slide relative to the retaining member A210 along the first direction AD1. Optionally, an opening is provided at the end of the clearance hole A120 away from the operating portion A101. Optionally, the clearance hole A120 is provided on the second groove wall A152, and the clearance hole A120 penetrates the second groove wall A152 along the second direction AD2. Optionally, regardless of whether the operating member A100 is in the waiting-to-operate position or the operating position, the projection surface of the limiting part A214 on the plane perpendicular to the second direction AD2 only partially overlaps with the projection surface of the clearance hole A120 on the plane perpendicular to the second direction AD2, while the projection surface of the non-limiting part A214 on the plane perpendicular to the second direction AD2 completely overlaps with the projection surface of the clearance hole A120 on the plane perpendicular to the second direction AD2. Therefore, the limiting part A214 cannot enter the clearance hole A120 along the second direction AD2, but can only abut against the second groove wall A152. Those skilled in the art will understand that since the limiting part A214 cannot enter the first groove wall A151 and the second groove wall A152 along the second direction AD2, the opening of the clearance hole A120 and the opening of the sliding hole A111b are designed to facilitate the assembly of the retainer A210 to the operating member A100.

[0320] Please refer to the above. Figure 5 and Figure 6In one embodiment of this application, the retaining member A210 is further provided with a guide portion A216. Optionally, the guide portion A216 and the engaging portion A213 are respectively provided on opposite sides of the limiting portion A214 in the second direction AD2, that is, the guide portion A216 and the engaging portion A213 are separated by the limiting portion A214. The guide portion A216 is provided in the clearance hole A120. Optionally, the guide portion A216 is configured as a generally cylindrical boss, which is coaxially arranged with the cylindrical engaging portion A213. When the operating member A100 moves relative to the guide portion A216, the arc-shaped outer peripheral surface of the guide portion A216 contacts the inner wall of the clearance hole A120, which can reduce the friction between the guide portion A216 and the inner wall of the clearance hole A120, and can reduce the risk of jamming between the guide portion A216 and the clearance hole A120. Optionally, in the third direction AD3, the width of the clearance hole A120 is slightly larger than the width of the guide portion A216. The cooperation between the clearance hole A120 and the guide portion A216 guides the operating member A100 to always slide along the generally first direction AD1, improving the stability of the movement of the operating member A100. Optionally, the guide portion A216 has an extension length in the second direction AD2, which ensures that the guide portion A216 is always located in the clearance hole A120 when the retainer A210 slides in the second direction AD2. At the same time, the clearance hole A120 extends along the first direction AD1, which can avoid the guide portion A216 when the operating member A100 slides along the generally first direction AD1, preventing the operating member A100 from abutting against the guide portion A216 in the first direction AD1. Furthermore, the cooperation between the clearance hole A120 and the guide portion A216 can also guide the retainer A210 to always slide along the generally second direction AD2.

[0321] In other embodiments, the retainer A210 may not have the guide portion A216, and the operating member A100 may not have the clearance hole A120.

[0322] like Figure 6 As shown, in this embodiment, the retainer A210 sequentially includes, along the second direction AD2, an unlocking part A211, a transition part A212, an engaging part A213, a limiting part A214, and a guide part A216. The transition part A212, the engaging part A213, and the guide part A216 are coaxially arranged about the axis AX1. When the user presses the unlocking part A211, the pressure can be transmitted along the axis AX1, reducing the risk of the retainer A210 tilting. When the operating member A100 slides from the waiting position to the operating position along the positive direction of the first direction AD1, the transition part A212 moves from the sliding hole A111b to the side of the through hole A111a away from the receiving groove A150, the guide part A216 slides relative to the clearance hole A120, the limiting part A214 slides in the receiving groove A150, and the engaging part A213 enters the through hole A111a from the receiving groove A150.

[0323] refer to Figure 9 and Figure 14 The operating mechanism A10 further includes an elastic element A220, which is capable of driving the retaining element A210 to slide to a retaining position when the operating element A100 is in the operating position. In this embodiment, the elastic element A220 is used to drive the engaging portion A213 to be received in the through hole A111a. Optionally, the elastic element A220 is disposed between the housing A900 and the retaining element A210, and is located on the side of the retaining element A210 away from the retaining hole A330 along the second direction AD2. The elastic element A220 applies a pushing force to the retaining element A210, causing the retaining element A210 to have a tendency to slide toward the retaining position. When the retaining element A210 is in the retaining position, at least a portion of the unlocking portion A211 protrudes from the retaining hole A330. The user drives the retaining element A210 to the release position by applying pressure to the unlocking portion A211, such as pressing the unlocking portion A211, to overcome the elastic force of the elastic element A220. In other embodiments, the operating mechanism A10 may not have the elastic element A220. The opposite direction of the second direction AD2 is the direction of gravity, and the retaining element A210 can be driven by its own gravity to slide to the retaining position when the operating element A100 is in the operating position. When the operating mechanism A10 does not have the elastic element A220, the retaining element A210 may not have the guide portion A216, and the operating element A100 may not have the clearance hole A120.

[0324] Continue to refer to Figure 9In one embodiment of this application, the retainer A210 is provided with a mounting groove A215 extending along the second direction AD2, and the elastic member A220 is partially disposed in the mounting groove A215. In the second direction AD2, one end of the mounting groove A215 is an opening provided at one end of the guide portion A216, and the other end of the mounting groove A215 (i.e., the bottom of the groove opposite the opening) forms an abutment surface A217. Optionally, the abutment surface A217 is located within the engaging portion A213. As can be seen from the above, the elastic member A220 extends along the second direction AD2 from the housing A900 through the clearance hole A120 to the abutment surface A217. When the operating member A100 slides along the generally first direction AD1, the clearance hole A120 avoids the guide portion A216 in the first direction AD1, and also avoids the elastic member A220. One end of the elastic element A220 abuts against the abutment surface A217, and the other end abuts against the housing A900, for example, against the first cover A300. The elastic element A220 continuously applies an elastic force to the abutment surface A217, causing the retaining element A210 to tend to move towards the retaining position. The mounting groove A215 provides mounting space for the elastic element A220, and the inner wall of the mounting groove A215 limits the elastic element A220, keeping it extending in the second direction AD2 and preventing bending, thereby ensuring that the thrust of the elastic element A220 is always distributed along the second direction AD2. Optionally, the mounting groove A215 and the guide portion A216 are coaxial about the axis AX1.

[0325] In other embodiments, the retainer A210 may not have a guide portion A216 located in the clearance hole A120, so that only the elastic member A220 extends into the clearance hole A120 to abut against the retainer A210, for example, only the elastic member A220 extends into the clearance hole A120 to abut against the limiting portion A214. In this case, the clearance hole A120 can be used to avoid the elastic member A220 in the first direction AD1 when the operating member A100 slides along the first direction AD1. Alternatively, the retainer A210 may have a guide portion A216 located in the clearance hole A120. The guide portion A216 protrudes beyond the second groove wall A152 in a direction away from the limiting portion A214. The elastic member A220 abuts against the guide portion A216 but does not extend into the clearance hole A120. In this case, the clearance hole A120 can be used to avoid the guide portion A216 in the first direction AD1 when the operating member A100 slides along the first direction AD1.

[0326] refer to Figure 3 and Figure 9In one embodiment of this application, a mounting cavity A310 and a socket cavity A350 that communicate with each other are formed within the housing A900. The mounting cavity A310 and the socket cavity A350 are formed by a hollow structure inside the housing A900. A rider passes through the housing A900 and is accommodated in the socket cavity A350. The mounting cavity A310 can be used to mount an operating member A100 and a retainer A210. The outer wall of the housing A900 protrudes outward from the rider A610, thereby forming the mounting cavity A310 that communicates with the socket cavity A350. Optionally, the mounting cavity A310 and the socket cavity A350 communicate with each other along a first direction AD1. The mounting cavity A310 has a first cavity wall A311 and a second cavity wall A312 distributed along a second direction AD2, and a third cavity wall A313 located on the side away from the socket cavity A350. The operating hole A320 penetrates the third cavity wall A313 along the first direction AD1, and the retaining hole A330 penetrates the first cavity wall A311 along the second direction AD2. Optionally, the maximum distance between the first cavity wall A311 and the second cavity wall A312 along the second direction AD2 is greater than the height of the operating member A100 along the second direction AD2, and also greater than the height of the retaining member A210 along the second direction AD2. Therefore, the operating member A100 and the retaining member A210 can be inserted into the mounting cavity A310 from the side of the mounting cavity A310 near the sleeve cavity A350. Optionally, the first cover A300 and the second cover A500 are assembled together along the first direction AD1, the mounting cavity A310 is located inside the first cover A300, the first cavity wall A311, the second cavity wall A312 and the third cavity wall A313 are formed on the inner side of the first cover A300, and the sleeve cavity A350 is partly located inside the first cover A300 and partly located inside the second cover A500.

[0327] Please refer to the above. Figures 3 to 5 and Figure 9In one embodiment of this application, at least one of the first cavity wall A311 and the second cavity wall A312 is provided with a first guide protrusion A340, and the outer surface of the operating member A100 is provided with a second guide protrusion A160 that cooperates with the first guide protrusion A340. During the movement of the operating member A100, the first guide protrusion A340 and the second guide protrusion A160 abut against each other on the third direction AD3, so that the operating member A100 always moves along a generally first direction AD1. Optionally, the second guide protrusion A160 is provided on the outer surface of at least one of the first groove wall A151 and the second groove wall A152 of the operating member A100. The first guide protrusion A340 includes a central guide strip A341 extending along a first direction AD1. The second guide protrusion A160 may include two central guide protrusions A161, which are distributed on both sides of the centerline AI of the operating member A100 in a third direction AD3. After the operating member A100 is inserted into the mounting cavity A310, the central guide strip A341 is sandwiched between the two central guide protrusions A161. Optionally, in other embodiments, the central guide strip A341 and / or the two central guide protrusions A161 may extend along the first direction AD1. Optionally, the central guide strip A341 is disposed on the first cavity wall A311, and the central guide protrusions A161 are disposed on the outer surface of the first groove wall A151. The mutual abutment between the central guide bar A341 and the two central guide protrusions A161 in the third direction AD3 restricts the movement of the central guide bar A341 in the third direction AD3, which helps to ensure the stability of the sliding of the operating member A100 in the first direction AD1. Optionally, the first guide protrusion A340 also includes two edge guide bars A342 located on both sides of the central guide bar A341 in the third direction AD3, and the two edge guide bars A342 extend along the first direction AD1 respectively. The second guide protrusion A160 also includes two edge guide protrusions A162 located on both sides of the two central guide protrusions A161 in the third direction AD3, and the two edge guide protrusions A162 abut against the two edge guide bars A342 respectively in the third direction AD3, thereby further restricting the movement of the operating member A100 in the third direction AD3, and further improving the stability of the sliding of the operating member A100 in the first direction AD1. Alternatively, in other embodiments, the two edge guide protrusions A162 and / or the two edge guide strips A342 extend along the first direction AD1.

[0328] Please refer to the above. Figure 2 , Figure 3 , Figure 5 Figure 7 and Figure 11In one embodiment of this application, the trolley A1 further includes a drive member A410, which connects the operating member A100 to the locking member A800. The drive member A410 is operably connected to the operating member A100. Optionally, the drive member A410 is disc-shaped. The drive member A410 is pivotally disposed in the housing A900 via a pivot axis A420. Sliding of the operating member A100 along a first direction AD1 can drive the drive member A410 to pivot about a pivot axis AX2. Optionally, the pivot axis AX2 is parallel to a second direction AD2. Optionally, the operating member A100 is provided with a drive portion A130, which extends along the first direction AD1 away from the operating portion A101. The end of the drive portion A130 away from the operating portion A101 is provided with a groove A131, which extends at least along a third direction AD3. Optionally, the drive unit A130 is disposed on the second groove wall A152. The drive member A410 has a connecting portion A411 corresponding to the drive unit A130. The sliding groove A131 is fitted with the connecting portion A411. When the operating member A100 slides along the first direction AD1, the sliding groove A131 pushes against the connecting portion A411, and the connecting portion A411 rotates about the pivot axis A420 (more precisely, about the pivot axis AX2). Optionally, the extension length of the sliding groove A131 in the first direction AD1 is approximately equal to the height of the connecting portion A411 in the first direction AD1. In such an embodiment, relative to the sliding groove A131, the connecting portion A411 translates only along the path defined by the extension of the sliding groove A131 along the third direction AD3. In other words, relative to the sliding groove A131, the connecting portion A411 slides only in the third direction AD3. Optionally, the extension length of the sliding groove A131 in the first direction AD1 is greater than the height of the connecting portion A411 in the first direction AD1. In such an embodiment, relative to the slide rail A131, the connecting portion A411 can translate not only along the path defined by the extension length of the slide rail A131 along the third direction AD3, but also along the path defined by the extension length of the slide rail A131 along the first direction AD1. When the operating member A100 is in the operating position, in the first direction AD1, the connecting portion A411 and the lower edge of the slide rail A131 (refer to...) Figure 11There is a gap between the sliding groove A131 and the connecting part A411. For the user, in the initial stage of pressing the operating member A100, the user will feel a "play" or "play" during this stage. In this "play" stage, the sliding groove A131 has not yet abutted against the connecting part A411, and the sliding of the operating member A100 in the first direction AD1 will not drive the driving member A410 to pivot. The user will feel almost no pressing resistance. When the sliding of the operating member A100 in the first direction AD1 causes the edge of the sliding groove A131 to abut against the connecting part A411, the sliding of the operating member A100 in the first direction AD1 begins to drive the driving member A410 to pivot, and the user will feel a certain pressing resistance. Thus, the operating member A100 drives the driving member A410 to pivot around the pivot axis AX2. In this embodiment, the connecting part A411 is configured in a shape similar to a mushroom pin. Optionally, the sliding groove A131 and the connecting part A411 can also be configured with other structures, as long as the sliding of the operating member A100 in the first direction AD1 can drive the driving member A410 to pivot around the pivot axis AX2.

[0329] Comparison Reference Figure 10 and Figure 11 In this embodiment, the receiving part A111 is disposed on the first groove wall A151, and the driving part A130 is disposed on the second groove wall A152. When the operating member A100 is in the operating position and the holding member A210 is in the holding position (e.g. Figure 14 As shown, the stress exerted by the driving member 411 on the operating member A100 and the stress exerted by the retaining member A210 on the operating member A100 are respectively applied to different positions of the operating member A100. This avoids stress concentration on the operating member A100, prevents stress fatigue of the material of the operating member A100, and extends the service life of the operating member A100.

[0330] refer to Figure 11 and Figure 12 Based on the pushing fit between the slide groove A131 and the connecting part A411, the force exerted by the connecting part A411 on the slide groove A131 has a component along the third direction AD3. This causes the operating member A100 to tend to move along the third direction AD3. If the operating member A100 moves along the third direction AD3, it may cause the operating member A100 to rotate on, for example, the plane formed by the first direction AD1 and the third direction AD3, thus hindering the sliding of the operating member A100 along the first direction AD1, or even causing it to "get stuck" in the operating hole 330 and unable to slide along the first direction AD1. By the cooperation between the limiting part A214 and the guide groove A140, the movement of the operating member A100 along the third direction AD3 is restricted, so that the operating member A100 can only slide along the first direction AD1, thereby avoiding the aforementioned "obstruction" and "getting stuck", and making the sliding of the operating member A100 along the first direction AD1 more stable.

[0331] In one embodiment of this application, the trolley A1 further includes a traction member A802, which is connected to the locking member A800 and the driving member A410, so that the operating member A100 can be indirectly connected to the locking member A800 through the driving member A410 and the traction member A802, so as to indirectly drive the locking member A800 to move from the locked position to the unlocked position. Optionally, the driving member A410 is also provided with a connecting hole A412, which is connected to the traction member A802, so that the pivoting of the driving member A410 can pull the traction member A802, so as to pull the locking member A800 out of the first locking hole A701 (see reference). Figure 2 This allows the wheel seat A710 to pivot relative to the frame A600. Optionally, the traction member A802 is made of materials such as steel wire or nylon rope. Optionally, in this embodiment, two traction members A802 are connected to the drive member A410, each traction member A802 being connected to a locking member A800. Optionally, during the sliding of the operating member A100 from the waiting position to the operating position in the first direction AD1, the drive member A410 pivots to the working position, thereby driving the two locking members A800 from the locked position to the unlocked position via the traction members A802.

[0332] Please refer to the above. Figure 2 and Figure 9 When the operating member A100 is in the ready-to-operate position and the holding member A210 is in the released position, under the action of the first reset member A801, the locking member A800 moves from the released position to the locked position, and the locking member A800 pulls the driving member A410 to pivot through the traction member A802. The connecting part A411 pivots with the driving member A410 to push against the slide groove A131 of the driving part A130. Thus, through the pushing cooperation between the operating member A100 and the connecting part A411, the operating member A100 moves from the operating position to the ready-to-operate position in the opposite direction of the first direction AD1.

[0333] Please refer to the above. Figures 8 to 12 , Figure 8 A portion of the retainer A210 is shown in dashed lines; the dashed portion is... Figure 8 The parts invisible from the viewing angle are shown with dashed lines to clearly illustrate the relative positions of the cutting lines CC, DD, EE, HH and the retainer A210. Figures 8 to 12 In the illustrated embodiment, the operating member A100 is in the ready-to-operate position, the holding member A210 is in the released position, and the driving member A410 is in the initial position. Figures 8 to 12 The state shown is defined as the initial state of the operating mechanism A10. Combined with... Figure 2 It can be seen that, Figures 8 to 12The operating mechanism A10 shown is in a state where it is not operated by the user, and the locking member A800 of the trolley A1 is in the locked position. At this time, the limiting part A214 abuts against the second groove wall A152 along the positive direction of the second direction AD2. The second groove wall A152 restricts the limiting part A214 from moving away from the first groove wall A151 in the second direction AD2, so as to prevent the unlocking part A211 from being completely retracted into the housing A900 and to prevent the elastic member A220 from undergoing irreversible deformation. At this time, the transition part A212 passes through the sliding hole A111b, the retaining member A210 does not restrict the sliding of the operating member A100 in the first direction AD1, and the engaging part A213 abuts against the first groove wall A151 in the opposite direction of the second direction AD2 under the action of the elastic member A220. The limiting part A214 and the engaging part A213 limit the retaining member A210 in both the positive and negative directions of the second direction AD2, thereby allowing the retaining member A210 to be held in the released position. At this time, the traction member A802 does not apply tension to the drive member A410 or only applies a small tension to the drive member A410 (i.e., the traction member A802 is in a slightly tensioned state), and the guide portion A216 is at least partially located in the clearance hole A120.

[0334] Please refer to the above. Figures 13 to 15 , Figure 13 A portion of the retainer A210 is shown in dashed lines; the dashed portion is... Figure 13 The parts invisible from the viewing angle are shown with dashed lines to clearly illustrate the relative positions of the cutting lines FF and GG and the retainer A210. Figures 13 to 15 In the illustrated embodiment, the operating member A100 is in the operating position, the holding member A210 is in the holding position, and the driving member A410 is in the working position, wherein... Figures 13 to 15 The state shown is defined as the working state of the operating mechanism A10. Figure 13 The operating mechanism A10 shown is in the state after being operated by the user, and the locking element A800 of the trolley A1 is in the unlocked position. At this time, in the first direction AD1, the operating member A100 abuts against the engaging part A213. The engaging part A213 prevents the operating member A100 from moving from the operating position to the waiting position in the opposite direction of the first direction AD1. Thus, the retaining member A210 holds the operating member A100 in the operating position. At this time, the limiting part A214 abuts against the first groove wall A151. The first groove wall A151 restricts the limiting part A214 from moving in the second direction AD2 away from the second groove wall A152, to prevent the retaining member A210 from disengaging from the operating member A100. The operating member A100, through the pushing engagement of the sliding groove A131 and the connecting part A411, holds the driving member 411 in the working position. The driving member 411, in turn, holds the locking member A800 in the unlocked position through the traction member A802. The guide part A216 is at least partially located in the clearance hole A120. Figure 15As shown.

[0335] The following is combined Figures 8 to 15 The operation mode of the operating mechanism A10 according to one embodiment of this application is described.

[0336] like Figures 8 to 12 As shown, the operating mechanism A10 is in the initial state. At this time, the operating member A100 is in the ready-to-operate position, the holding member A210 is in the released position, the driving member A410 is in the initial position, the locking member A800 is in the locked position, the pivoting of the wheel seat A710 relative to the frame A600 is locked, and the wheel A720 is set as a directional wheel.

[0337] When it is necessary to release the pivoting of the wheel seat A710 relative to the frame A600, the user presses the operating part A101 of the operating member A100, driving the operating member A100 from the operating position (e.g., in the positive direction of the first direction AD1) along the direction of the first direction AD1. Figures 8 to 12 Slide to the operating position (as shown) Figures 13 to 15 As shown), the engaging portion A213 aligns with the through hole A111a in the second direction AD2. Under the action of the elastic member A220, the engaging portion A213 enters the through hole A111a. That is, the retaining member A210 slides from the release position to the retaining position in the opposite direction of the second direction AD2. The retaining member A210 holds the operating member A100 in the operating position, and the sliding tendency of the operating member A100 in the opposite direction of the first direction AD1 caused by the first reset member A801 ​​is also restricted by the retaining member A210. Moreover, the limiting portion A214 abuts against the first groove wall A151, as shown. Figure 14 As shown. At this point, the operating mechanism A10 enters the working state, and the user can release the pressure on the operating part A100. The slide groove A131 pushes against the connecting part A411, driving the driving part 411 to pivot from the initial position to the working position. The pivoting of the driving part 411, through the traction part A802, pulls the locking part A800 out of the first locking hole A701, and the locking part A800 enters the unlocked position. Since the operating part A100 is kept in the operating position, the locking part A800 is also kept in the unlocked position through the pushing cooperation of the slide groove A131 and the connecting part A411, so that the pivoting of the wheel seat A710 relative to the frame A600 is unlocked, and the wheel A720 is set as a swivel wheel.

[0338] When it is necessary to relock the pivoting of wheel seat A710 relative to frame A600, the user presses the unlocking part A211 of retainer A210 (for comparison). Figure 8 and Figure 13The retaining member A210 slides towards the release position along the positive direction of the second direction AD2 until the engaging part A213 disengages from the through hole A111a, that is, the retaining member A210 slides to the release position. At this time, in the first direction AD1, the wall of the through hole A111a disengages from the engaging part A213, the retaining member A210 no longer restricts the sliding of the operating member A100 in the first direction AD1, and the limiting part A214 abuts against the second groove wall A152. The user pushes the trolley A1 to rotate the wheel seat A710 relative to the frame A600 until the first locking hole A701 on the wheel seat A710 aligns with the second locking hole A601 on the frame A600. Under the action of the first reset member A801, the locking member A800 enters the first locking hole A701, and the locking member A800 enters the locked position. The pulling force applied to the driving member A410 by the traction member A802 drives the driving member A410 to pivot from the working position to the initial position. Through the pushing engagement of the slide groove A131 and the connecting part A411, the pivot drive operating member A100 of the drive member A410 slides from the operating position to the waiting position along the opposite direction of the first direction AD1. At this point, the operating mechanism A10 returns to its initial state.

[0339] In the operating mechanism A10 according to the embodiments of this application, by cooperating with the retainer A210 and the operating member A100, the user can keep the operating member A100 in the operating position without continuously applying external force to it, thereby continuously providing a holding force to the target device operably connected to the operating member A100 to keep the target device in a certain characteristic position, such as keeping the locking member A800 of the trolley A1 in the unlocked position.

[0340] refer to Figure 16 Another embodiment of this application provides an operating mechanism A10 for a trolley A1. In this embodiment, components such as the frame A600, wheel seats A710, wheels A720, locking member A800, first reset member A801, traction member A802, first locking hole A701, and second locking hole A601 in the trolley A1 are connected to... Figure 2 The corresponding components are the same in the illustrated embodiments, and their structures and connections will not be described again here. Figure 2 Similar to the embodiment shown, in this embodiment, the user can switch the locking member A800 to and hold it in the unlocked position by operating the operating mechanism A10, so that the first element (e.g., the frame A600) and the second element (e.g., the wheel seat A710) are kept in an active connection (e.g., pivotally connected).

[0341] exist Figures 16 to 21In the illustrated embodiment, the operating mechanism A10 includes an operating member A100, a retaining member A210, and a housing A900. Both the operating member A100 and the retaining member A210 are movable relative to the housing A900. The operating member A100 moves relative to the housing A900 along a first direction AD1 between a waiting position and an operating position, while the retaining member A210 moves relative to the housing A900 along a second direction AD2 between a holding position and a release position. The housing A900 is provided with an operating hole A320, in which the operating member A100 is movably disposed. Optionally, the operating member A100 is provided with an operating portion A101. When the operating member A100 is in the waiting position, at least a portion of the operating portion A101 protrudes from the operating hole A320 for user operation, driving the operating member A100 to move from the waiting position to the operating position along the positive direction of the first direction AD1. In this embodiment, the operating portion A101 is adapted for user pressing. Optionally, the operating member A100 is slidably disposed in the operating hole A320 and can slide along the first direction AD1. The sliding trajectory of the operating member A100 passes through at least the pending operation position and the operation position, that is, the operating member A100 is slidably connected to the housing A900. Optionally, the shape of the operating hole A320 is adapted to the orthographic projection shape of the operating part A101 on the plane perpendicular to the first direction AD1. Therefore, the operating part A101 can protrude from the housing A900 along the first direction AD1, and the operating hole A320 can limit the operating member A100, so that the operating member A100 can only slide along the first direction AD1. The housing A900 is provided with a retaining hole A923, and the retaining member A210 is movably disposed in the retaining hole A923. The retaining hole A923 extends along the second direction AD2. Optionally, the retainer A210 is slidably disposed in the retaining hole A923 and is capable of sliding along the second direction AD2. The sliding trajectory of the retainer A210 passes through at least the retaining position and the releasing position, that is, the retainer A210 is slidably connected to the housing A900. Optionally, the retainer A210 is provided with an unlocking part A211. Regardless of whether the retainer A210 is in the retaining position or the releasing position, the unlocking part A211 protrudes fully from the retaining hole A923, that is, protrudes from the housing A900, so as to be pushed by the user, thereby driving the retainer A210 to move from the retaining position to the releasing position along the second direction AD2. Optionally, the retainer A210 further includes a transition portion A212 located in the retaining hole A923. The transition portion A212 passes through the retaining hole A923 and is connected to the unlocking portion A211. When the retainer A210 slides in the second direction AD2, the transition portion A212 located in the retaining hole A923 slides along the second direction AD2, and the unlocking portion A211 slides outside the retaining hole A923 along the second direction AD2, that is, outside the housing A900 along the second direction AD2.

[0342] Optionally, such as Figures 17 to 19The housing A900 includes a first cover A300 and a second cover A500, which are engaged with each other to form a hollow mounting cavity A310. Optionally, the first cover A300 and the second cover A500 are engaged with each other in a first direction AD1. Optionally, an operation hole A320 is provided on the first cover A300. Optionally, a retaining hole A923 is provided on the first cover A300.

[0343] refer to Figure 19In one embodiment of this application, the housing A900 further includes a bracket A180. The bracket A180 is at least partially disposed in the mounting cavity A310, and is fixedly connected to at least one of the first cover A300 and the second cover A500. In this embodiment, the bracket A180 is fixedly connected to both the first cover A300 and the second cover A500. The bracket A180 is provided with a mounting hole A181, which is aligned with an operating hole A320 in a first direction AD1, thereby simultaneously disposing the operating member A100 in both the mounting hole A181 and the operating hole A320. When the operating member A100 slides in the first direction AD1, a portion of the operating member A100 slides in the mounting hole A181. Optionally, the shape of the mounting hole A181 is adapted to the orthographic projection shape of the operating part A101 on a plane perpendicular to the first direction AD1. Thus, the mounting hole A181 can limit the operating member A100, allowing it to slide only in the first direction AD1. Optionally, the housing A900 is provided with a first guide protrusion, and the outer surface of the operating member A100 is provided with a second guide protrusion that cooperates with and guides the first guide protrusion. During the movement of the operating member A100, the first guide protrusion and the second guide protrusion abut against each other in the second direction AD2, ensuring that the operating member A100 always slides approximately along the first direction AD1. In this embodiment, the first guide protrusion includes two central guide strips extending along the first direction AD1, and the second guide protrusion includes a central guide protrusion A1812 sandwiched between the two central guide strips in the second direction AD2. Optionally, the central guide protrusion A1812 is configured as a guide rib. In other embodiments, two central guide strips and / or a central guide protrusion A1812 may extend along a first direction AD1. The mutual abutment between the two central guide strips and the central guide protrusion A1812 in a second direction AD2 restricts the movement of the central guide protrusion A1812 in the second direction AD2, which helps to ensure the stability of the sliding of the operating member A100 in the first direction AD1. Specifically, the two central guide strips and the space between the two central guide strips form part of a guide groove A1811, which communicates with the mounting hole A181, i.e., the guide groove A1811 is formed by recessing from the hole wall of the mounting hole A181. The guide groove A1811 extends along the first direction AD1, and the central guide protrusion A1812 can enter the guide groove A1811 and slide along the guide groove A1811. The cooperation between the central guide protrusion A1812 and the guide groove A1811 guides the sliding of the operating member A100 in the first direction AD1. By setting the central guide protrusion A1812 and the guide groove A1811, the stability of the sliding of the operating member A100 in the first direction AD1 is further improved, making the sliding of the operating member A100 in the first direction AD1 smoother.When the central guide protrusion A1812 slides to the bottom of the guide groove A1811, the operating member A100 reaches its limit position in the positive direction of the first direction AD1. Optionally, the operating member A100 reaches this limit position only after passing through the operating position. Optionally, this limit position is the operating position of the operating member A100. It will be understood by those skilled in the art that although in this embodiment the guide groove A1811 is disposed on the bracket A180 and the central guide protrusion A1812 is disposed on the operating member A100, this is only exemplary, and the positions of the guide groove A1811 and the central guide protrusion A1812 can also be interchanged. For example, the guide groove A1811 is disposed on the operating member A100 and the central guide protrusion A1812 is disposed on the bracket A180. This application does not limit this.

[0344] refer to Figures 16 to 21 In this embodiment, the same Figures 3 to 15 In the illustrated embodiment, the direction in which the operating member A100 moves from the position to the operating position along the first direction AD1 is defined as the positive direction of the first direction AD1, and the direction in which the operating member A100 moves from the operating position to the position to the operating position along the first direction AD1 is defined as the negative direction of the first direction AD1. In this embodiment, for example, in... Figure 20 and Figure 21 In the diagram, vertically upward is the positive direction of the first direction AD1, and vertically downward is the negative direction of the first direction AD1. (The same applies to other directions.) Figures 3 to 15 In the illustrated embodiment, the direction of movement of the retainer A210 from the holding position to the release position in the second direction AD2 is defined as the positive direction of the second direction AD2, and the direction of movement of the retainer A210 from the release position to the holding position in the second direction AD2 is defined as the negative direction of the second direction AD2. In this embodiment, for example, in Figure 20 and Figure 21 In this embodiment, the horizontal direction to the left is the positive direction of the second direction AD2, and the horizontal direction to the right is the opposite direction of the second direction AD2. In this embodiment, the first direction AD1 and the second direction AD2 are orthogonal, meaning both are straight lines. Those skilled in the art will understand that the orthogonality of the first direction AD1 and the second direction AD2 is merely exemplary, and they can choose other intersection angles for the first direction AD1 and the second direction AD2 according to actual needs.

[0345] Optionally, when the operating member A100 is in the waiting position (e.g., when the user has not pressed the operating part A101), the retaining member A210 is in the released position. There is no connection between the retaining member A210 and the operating member A100 that can restrict the sliding of the operating member A100. Therefore, the retaining member A210 does not restrict the sliding of the operating member A100 along the first direction AD1, and the operating member A100 can move from the waiting position to the operating position along the positive direction of the first direction AD1. When the operating member A100 slides from the waiting position to the operating position along the positive direction of the first direction AD1 (for example, the position reached by the operating member A100 after the user presses the operating part A101 to drive the operating member A100 to slide), and the holding member A210 slides from the release position to the holding position along the opposite direction of the second direction AD2, a connection relationship is established between the holding member A210 and the operating member A100 that can restrict the sliding of the operating member A100. For example, the holding member A210 and the operating member A100 abut against each other in the first direction AD1, and the holding member A210 blocks the operating member A100 from sliding in the first direction AD1, for example, it blocks the operating member A100 from sliding from the operating position to the waiting position along the opposite direction of the first direction AD1.

[0346] refer to Figures 19 to 21In one embodiment of this application, the operating member A100 includes a receiving portion A111, and the retaining member A210 includes an engaging portion A213. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the receiving portion A111 and the engaging portion A213 abut against each other in the first direction AD1. Thus, the retaining member A210 prevents the operating member A100 from moving from the operating position to the waiting-to-operate position in the opposite direction of the first direction AD1, and the operating member A100 is held in the operating position. Optionally, the engaging portion A213 is then housed within the receiving portion A111 in the second direction AD2. When the receiving portion A111 and the engaging portion A213 no longer abut against each other in the first direction AD1, that is, when the operating member A100 and the retaining member A210 no longer abut against each other in the first direction AD1, the retaining member A210 is in the released position, and the operating member A100 can move between the operating position and the waiting-to-operate position along the first direction AD1. Optionally, at this time, the engaging part A213 disengages from the receiving part A111 in the second direction AD2. Optionally, in one embodiment of this application, the receiving part A111 includes a groove A111c. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the engaging part A213 can enter and be accommodated in the groove A111c in the opposite direction of the second direction AD2. The groove wall of the groove A111c abuts against the engaging part A213 in the first direction AD1, thereby restricting the sliding of the operating member A100 in the first direction AD1 and preventing the operating member A100 from moving from the operating position to the waiting position in the opposite direction of the first direction AD1. That is, the retaining member A210 holds the operating member A100 in the operating position, while the engaging part A213 also abuts against the bottom of the groove A111c in the opposite direction of the second direction AD2. The bottom of the groove A111c restricts the retaining member A210 from continuing to move in the opposite direction of the second direction AD2, thereby holding the retaining member A210 in the retaining position. Specifically, the engaging portion A213 is configured as a generally cylindrical structure, and the groove A111c is configured as a cylindrical groove structure that matches the engaging portion A213, and is formed by recessing inward from the outer surface of the operating member A100 along the second direction AD2. Specifically, the groove wall portion of the cylindrical groove A111c is cut off, and the groove wall of this groove A111c is set with a superior arc, as detailed in [link to details]. Figure 19 .

[0347] refer to Figure 19Optionally, on the third direction AD3, the unlocking part A211 is located on one side of the engaging part A213 and is interconnected by the transition part A212 located in the retaining hole A923, that is, the transition part A212 is located between the unlocking part A211 and the engaging part A213 on the third direction AD3. Optionally, the engaging part A213, the transition part A212, and the unlocking part A211 are an integral structure. When the engaging part A213 is received in the groove A111c, that is, when the retainer A210 is in the retaining position, the user pushes the unlocking part A211 to drive the retainer A210 to slide from the retaining position to the release position, so that the engaging part A213 moves out of the groove A111c. In this embodiment, the third direction AD3 is orthogonal to both the first direction AD1 and the second direction AD2, that is, the third direction AD3 is also a straight line direction. Those skilled in the art will understand that the fact that the third-direction AD3 is orthogonal to the first direction AD1 and the second direction AD2 is merely exemplary, and those skilled in the art can choose other relative positional relationships for the first direction AD1, the second direction AD2 and the third-direction AD3 according to actual needs.

[0348] refer to Figure 19 In one embodiment of this application, a hollow first mounting portion A920 is provided on the housing A900. The first mounting portion A920 extends along the second direction AD2, and the hollow inner cavity of the first mounting portion A920 forms a first groove A921, which communicates with the operating hole A320. A locking portion A213 is disposed in the first groove A921 of the first mounting portion A920, and a retaining member A210 is slidable relative to the first mounting portion A920 along the second direction AD2 between a holding position and a releasing position. When the retaining member A210 slides along the second direction AD2, the locking portion A213 located in the first groove A921 slides along the second direction AD2. The retaining hole A923 is disposed on the first mounting portion A920 and communicates with the first groove A921.

[0349] Continue to refer to Figure 19Optionally, in one embodiment of this application, the housing A900 further includes an end cap A922. The first mounting portion A920 is configured with an opening at one end in the second direction AD2 away from the operating hole A320, and the end cap A922 is provided on the opening. The end cap A922 closes one end of the first mounting portion A920, so that the retainer A210 cannot slide out from the hollow cavity of the first mounting portion A920 along the second direction AD2 toward the side away from the operating hole A320. Optionally, the operating mechanism A10 is further provided with an elastic member A220, which can drive the retainer A210 to slide to the retaining position when the operating member A100 is in the operating position. In this embodiment, the elastic member A220 is used to drive the engaging portion A213 to be received in the groove A111c. Optionally, the elastic member A220 is disposed between the housing A900 and the retainer A210, and is located on one side of the retainer A210 along the second direction AD2. The elastic member A220 applies a pushing force to the retainer A210, causing the retainer A210 to have a tendency to slide toward the retaining position. Specifically, one end of the elastic member A220 abuts against the end cap A922, and the other end of the elastic member A220 abuts against the engaging portion A213 of the retainer A210. The elastic member A220 applies a force to the engaging portion A213 in the opposite direction along the second direction AD2, causing the engaging portion A213 to have a tendency to slide toward the retaining position, that is, to cause the engaging portion A213 to have a tendency to slide toward the groove A111c. When the operating member 10 is in a position other than the operating position, such as the waiting-to-operate position, the engaging portion A213 is offset from the groove A111c in the second direction AD2, and the engaging portion A213 abuts against the side wall of the operating member 10 other than the groove A111c. At this time, the retaining member A210 is in the released position. Optionally, the elastic member A220 can be any suitable elastic mechanism known in the art, such as a spring, sheet spring, or torsion spring. When the operating member 10 slides to the operating position, the engaging portion A213 is aligned with the groove A111c in the second direction AD2. Under the action of the elastic member A220, the engaging portion A213 can enter and be accommodated in the groove A111c and abut against the bottom of the groove A111c, thereby allowing the retaining member A210 to slide to the retaining position. At this time, the groove wall of the groove A111c abuts against the engaging part A213 in the first direction AD1, and the retaining member A210 blocks the sliding of the operating member A100 in the first direction AD1. That is, the blocking operating member A100 moves from the operating position to the waiting position in the opposite direction of the first direction AD1.

[0350] Continue to refer to Figure 19In one embodiment of this application, the trolley A1 further includes a second reset member A250, which is located between the housing A900 and the operating member A100 and abuts against the operating member A100 to apply a force to the operating member A100 in the opposite direction to the first direction AD1, causing the operating member A100 to tend to slide toward the position to be operated. Optionally, the second reset member A250 is located between the bracket A180 and the operating member A100. In actual use, when the retainer A210 is in the released position, the operating member A100 can move from the operating position to the position to be operated under the action of the second reset member A250. Optionally, the second reset member A250 can be any suitable elastic mechanism known in the art, such as a spring, a sheet spring, or a torsion spring.

[0351] Continue to refer to Figure 19In one embodiment of this application, the trolley A1 further includes a drive member A410, which connects the operating member A100 to the locking member A800. The drive member A410 and the operating member A100 are operably connected. In this embodiment, the housing A900 is further provided with a second mounting portion A510 protruding from the second cover A500 toward the mounting cavity A310. A second groove A511 extending along the second direction AD2 is formed on the second mounting portion A510. Optionally, the second mounting portion A510 extends from the second cover A500 into the mounting hole A181 of the bracket A180. Optionally, the second mounting portion A510 is formed as a plate-like member protruding from the second cover A500 toward the mounting cavity A310. A third groove A170 is also formed on the side wall of the operating member A100. The extending direction of the third groove A170 intersects both the first direction AD1 and the second direction AD2. The driving member A410 includes a first column A4101 and a second column A4102 connected to each other. Optionally, the first column A4101 and the second column A4102 are an integral structure. The first column A4101 and the second column A4102 are configured as approximately cylindrical and are coaxially arranged. The diameter of the first column A4101 is smaller than the diameter of the second column A4102. The first column A4101 is disposed in the second groove A511 and can slide along the second groove A511 in the second direction AD2; the second column A4102 is disposed in the third groove A170 and can slide along the third groove A170. When the operating member A100 slides in the first direction AD1, the groove wall of the third groove A170 pushes against the second column A4102, and the groove wall of the second groove A511 pushes against the first column A4101. Since the second groove A511 does not displace in the first direction AD1, it restricts the sliding of the first column A4101 in the first direction AD1. Therefore, the first column A4101 can only slide in the second direction AD2. Those skilled in the art will understand that, since the extension direction of the third groove A170 intersects both the first direction AD1 and the second direction AD2, when the third groove A170 does not displace in the first direction AD1 (i.e., when the operating member A100 does not slide in the first direction AD1), the groove wall of the third groove A170 can restrict the sliding of the second column A4102 in the second direction AD2. At this time, the driving member A410 cannot move in either the first direction AD1 or the second direction AD2. Thus, under the combined action of the second groove A511 and the third groove A170, the sliding of the operating member A100 in the first direction AD1 drives the driving member A410 to slide in the second direction AD2. Optionally, the first body A4101 can also be disposed in the third groove A170 to slide along the third groove A170. When the operating member A100 slides in the first direction AD1, the groove walls of the second groove A511 and the third groove A170 push against the first body A4101 to slide along the second direction AD2.

[0352] Continue to refer to Figures 19 to 21 The trolley A1 further includes a traction member A802, which is connected to a locking member A800 and a driving member A410. This allows the operating member A100 to be indirectly connected to the locking member A800 via the driving member A410 and the traction member A802, thereby indirectly driving the locking member A800 from a locked position to an unlocked position. Specifically, the driving member A410 is connected to one end of the traction member A802, so that the sliding driving member A410 can drive the locking member A800, which is connected to the other end of the traction member A802, from a locked position to an unlocked position. In this embodiment, two driving members A410 are provided, each of which is connected to a traction member A802, so that each of the two driving members A410 is connected to a locking member A800. During the process of the operating member A100 sliding from the waiting position to the operating position in the first direction AD1, the two driving members A410 slide towards each other in the second direction AD2 from the initial position to the working position, thereby each driving member A410 drives a locking member A800 to move from the locked position to the unlocked position through the traction member A802.

[0353] The following is combined Figure 16 , Figure 20 and Figure 21 This describes the operation of the operating mechanism A10 according to one embodiment of the present application. Similar to the foregoing embodiments, for ease of description, [the following will be used]. Figure 20 The state shown is defined as the initial state of the operating mechanism A10. At this time, the operating member A100 is in the ready-to-operate position, the holding member A210 is in the released position, the driving member A410 is in the initial position, the locking member A800 is in the locked position, the pivoting of the wheel seat A710 relative to the frame A600 is locked, and the wheel A720 is configured as a directional wheel (see reference). Figure 2 ).

[0354] When it is necessary to release the pivoting of the wheel seat A710 relative to the frame A600, the user presses the operating part A101 of the operating member A100, driving the operating member A100 to slide from the waiting position to the operating position along the positive direction of the first direction AD1 (e.g., Figure 20 and Figure 21As shown), the engaging portion A213 aligns with the groove A111c in the second direction AD2. Under the action of the elastic member A220, the engaging portion A213 enters the groove A111c. That is, the retaining member A210 slides from the release position to the retaining position in the opposite direction of the second direction AD2. The retaining member A210 holds the operating member A100 in the operating position, and the sliding tendency of the operating member A100 in the opposite direction of the first direction AD1 caused by the first reset member A801 ​​and the second reset member A250 is also restricted by the retaining member A210. The engaging portion A213 abuts against the bottom of the groove A111c. Figure 21 As shown. At this point, the operating mechanism A10 enters the working state, and the user can release the pressure on the operating element A100. As described above, the sliding drive element A410 of the operating element A100 moves from the initial position to the working position along the second direction AD2. The drive element A410 drives the locking element A800 to disengage from the first locking hole A701 via the traction element A802. The locking element A800 enters the unlocked position. Since the operating element A100 remains in the operating position, the drive element A410, under the combined action of the second groove A511 and the third groove A170, cannot move in either the first direction AD1 or the second direction AD2. This keeps the locking element A800 in the unlocked position, releasing the pivoting of the wheel seat A710 relative to the frame A600, and the wheel A720 is configured as a swivel wheel.

[0355] When it is necessary to relock the pivoting of wheel seat A710 relative to frame A600, the user pushes the unlocking part A211 to drive retainer A210 to slide from the retaining position to the releasing position along the positive direction of the second direction AD2, until the engaging part A213 disengages from the groove A111c, that is, retainer A210 slides to the releasing position. At this time, the engaging part A213 disengages from the groove A111c, and in the first direction AD1, the groove wall of groove A111c disengages from the engaging part A213, and retainer A210 no longer restricts the sliding of operating member A100 in the first direction AD1. The user pushes the trolley A1 to rotate the wheel seat A710 until the first locking hole A701 on the wheel seat A710 aligns with the second locking hole A601 on the frame A600. Under the action of the first reset member A801, the locking member A800 enters the first locking hole A701 and enters the locked position. The pulling member A802 applies a pulling force to the drive member A410, driving the drive member A410 to pivot from the working position to the initial position. Under the action of the second reset member A250, the operating member A100 slides from the operating position to the waiting position along the opposite direction of the first direction AD1. The third groove A170 drives the two drive members A410 to slide away from each other in the second direction AD2 back to the initial position. At this point, the operating mechanism A10 returns to the initial state. Those skilled in the art will understand that after the user pushes the retainer A210 to the release position, as long as the second reset member A250 drives the operating member A100 to slide in the opposite direction of the first direction AD1 (without needing to slide to the operating position), the user can stop pushing the retainer A210. This is because at this time, the groove A111c and the engaging part A213 are already misaligned in the second direction AD2, and releasing the push on the retainer A210 will prevent the engaging part A213 from re-entering the groove A111c. Therefore, under the action of the second reset member A250, the operating member A100 will slide to the operating position in the opposite direction of the first direction AD1.

[0356] In the operating mechanism A10 according to the embodiments of this application, by cooperating with the retainer A210 and the operating member A100, the user can keep the operating member A100 in the operating position without continuously applying external force to it, thereby continuously providing a holding force to the target device operably connected to the operating member A100 to keep the target device in a certain characteristic position, such as keeping the locking member A800 of the trolley A1 in the unlocked position.

[0357] Figures 22A to 25The illustration shows an operating mechanism A10 for a trolley A1 according to another embodiment of the present application. In this embodiment, components such as the frame A600, wheel seats A710, wheels A720, locking member A800, first reset member A801, traction member A802, first locking hole A701, and second locking hole A601 in the trolley A1 are connected to... Figure 2 The corresponding components are the same in the illustrated embodiments, and their structures and connections will not be described again here. Figure 2 Similar to the embodiment shown, in this embodiment, the user can switch the locking member A800 to and hold it in the unlocked position by operating the operating mechanism A10, so that the first element (e.g., the frame A600) and the second element (e.g., the wheel seat A710) are kept in an active connection (e.g., pivotally connected).

[0358] In Figure 22 to Figure 25In the illustrated embodiment, the operating mechanism A10 includes an operating member A100, a retaining member A210, and a housing A900. Both the operating member A100 and the retaining member A210 are movable relative to the housing A900. The operating member A100 moves relative to the housing A900 along a first direction AD1 between a waiting position and an operating position, while the retaining member A210 moves relative to the housing A900 along a second direction AD2 between a holding position and a release position. The housing A900 is provided with an operating hole A320, in which the operating member A100 is movably disposed. Optionally, the operating member A100 is provided with an operating portion A101. When the operating member A100 is in the waiting position, at least a portion of the operating portion A101 protrudes from the operating hole A320 for user operation, driving the operating member A100 to move from the waiting position to the operating position along the positive direction of the first direction AD1. In this embodiment, the operating portion A101 is for user pressing. Optionally, the operating member A100 is slidably disposed in the operating hole A320 and can slide along the first direction AD1. The sliding trajectory of the operating member A100 passes through at least the pending operation position and the operation position, that is, the operating member A100 is slidably connected to the housing A900. Optionally, the shape of the operating hole A320 is adapted to the orthographic projection shape of the operating part A101 on the plane perpendicular to the first direction AD1. Therefore, the operating part A101 can protrude from the housing A900 along the first direction AD1, and the operating hole A320 can limit the operating member A100, so that the operating member A100 can only slide along the first direction AD1. The housing A900 is provided with a retaining hole A923, and the retaining member A210 is movably disposed in the retaining hole A923. The retaining hole A923 extends along the second direction AD2. Optionally, the retainer A210 is pivotally disposed in the retaining hole A923 and is capable of rotating along the second direction AD2. The pivoting trajectory of the retainer A210 passes through at least the retaining position and the releasing position, that is, the retainer A210 is pivotally connected to the housing A900. Optionally, the retainer A210 is provided with an unlocking part A211. Regardless of whether the retainer A210 is in the retaining position or the releasing position, at least a portion of the unlocking part A211 protrudes from the retaining hole A923, that is, protrudes from the housing A900, so as to be pushed by the user, thereby driving the retainer A210 to pivot from the retaining position to the releasing position along the second direction AD2.

[0359] refer to Figures 23 to 25 In this embodiment, the same Figures 3 to 15 In the illustrated embodiment, the direction in which the operating member A100 moves from the position to the operating position along the first direction AD1 is defined as the positive direction of the first direction AD1, and the direction in which the operating member A100 moves from the operating position to the position to the operating position along the first direction AD1 is defined as the negative direction of the first direction AD1. For example, in Figure 24 and Figure 25In the diagram, vertically upward is the positive direction of the first direction AD1, and vertically downward is the negative direction of the first direction AD1. (The same applies to other directions.) Figures 3 to 15 In the illustrated embodiment, the direction of movement of the retainer A210 from the holding position to the release position in the second direction AD2 is defined as the positive direction of the second direction AD2, and the direction of movement of the retainer A210 from the release position to the holding position in the second direction AD2 is defined as the negative direction of the second direction AD2. Figures 23 to 25 In the diagram, the second direction AD2 refers to the pivoting direction around the pivot axis AX3. Figure 24 and Figure 25 In this embodiment, clockwise direction is the positive direction of the second direction AD2, and counterclockwise direction is the opposite direction of the second direction AD2. The first direction AD1 and the second direction AD2 intersect; the first direction AD1 is a straight line, and the second direction AD2 is a curve.

[0360] like Figures 23 to 25 Optionally, the housing A900 includes a first cover A300 and a second cover A500, which are fastened together to form a hollow mounting cavity A310. Optionally, an operating hole A320 and a retaining hole A923 are provided on the fastened first cover A300 and the second cover A500.

[0361] like Figure 23Optionally, in this embodiment, the housing A900 is provided with a first guide protrusion, and the outer surface of the operating member A100 is provided with a second guide protrusion that cooperates with the first guide protrusion. During the movement of the operating member A100, the first guide protrusion and the second guide protrusion abut against each other on the third direction AD3, so that the operating member A100 always slides along approximately the first direction AD1. In this embodiment, the first guide protrusion includes two central guide strips A341, which extend along the first direction AD1, and the second guide protrusion includes a central guide protrusion A1812, which is sandwiched between the two central guide strips A341 on the third direction AD3. Optionally, in other embodiments, the two central guide strips A341 and / or the central guide protrusion A1812 may extend along the first direction AD1. The mutual abutment between the two center guide bars A341 and the center guide protrusion A1812 in the third direction AD3 restricts the movement of the center guide protrusion A1812 in the second direction AD3, which helps to ensure the stability of the sliding of the operating member A100 in the first direction AD1. Specifically, the two center guide bars A341 and the space between them form part of the guide groove A1811, which communicates with the mounting cavity A310. The guide groove A1811 extends along the first direction AD1, and the center guide protrusion A1812 can enter the guide groove A1811 and slide along it. Optionally, the center guide protrusion A1812 is configured as a guide rib. Those skilled in the art will understand that, although in this embodiment, the guide groove A1811 is disposed on the housing A900 and the central guide protrusion A1812 is disposed on the operating member A100, this is merely exemplary. The positions of the guide groove A1811 and the central guide protrusion A1812 can also be interchanged. For example, the guide groove A1811 can be disposed on the operating member A100 and the central guide protrusion A1812 can be disposed on the housing A900. This application does not impose any limitations on this. Optionally, the third direction AD3 is orthogonal to the first direction AD1, that is, the third direction AD3 is also a straight line direction.

[0362] Optionally, when the operating member A100 is in the ready-to-operate position (i.e., when the user has not yet pressed the operating part A101) and the retaining member A210 is in the retaining position, a connection relationship is established between the retaining member A210 and the operating member A100 that can restrict the sliding of the operating member A100. For example, the retaining member A210 and the operating member A100 abut against each other in the first direction AD1, and the retaining member A210 blocks the operating member A100 from sliding in the first direction AD1, for example, blocking the sliding from the ready-to-operate position to the operating position of the operating member A100. Optionally, when the operating member A100 slides to the operating position (for example, the position reached by the operating member A100 after the user presses the operating part A101 to drive the operating member A100 to slide), and the retaining member A210 is in the retaining position, a connection relationship is established between the retaining member A210 and the operating member A100 that can restrict the sliding of the operating member A100. For example, the retaining member A210 abuts against the operating member A100 in the first direction AD1, and the retaining member A210 blocks the operating member A100 from sliding in the first direction AD1, for example, preventing the operating member A100 from sliding from the operating position to the waiting position.

[0363] refer to Figures 23 to 25In one embodiment of this application, the operating member A100 includes a receiving portion A111, and the retaining member A210 includes an engaging portion A213. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the receiving portion A111 and the engaging portion A213 abut against each other in the first direction AD1, thereby preventing the operating member A100 from moving from the operating position to the waiting-to-operate position, and the operating member A100 is held in the operating position. Optionally, at this time, the engaging portion A213 is housed in the receiving portion A111 in the second direction AD2. When the receiving portion A111 and the engaging portion A213 no longer abut against each other in the first direction AD1, that is, when the operating member A100 and the retaining member A210 no longer abut against each other in the first direction AD1, the retaining member A210 is in the released position, and the operating member A100 can move between the operating position and the waiting-to-operate position along the first direction AD1. Optionally, at this time, the engaging portion A213 disengages from the receiving portion A111 in the second direction AD2. Optionally, in one embodiment of this application, the receiving portion A111 includes a groove A111c. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the engaging portion A213 can enter and be accommodated in the groove A111c. The groove wall of the groove A111c abuts against the engaging portion A213 in the first direction AD1, thereby preventing the operating member A100 from sliding in the first direction AD1, that is, preventing the operating member A100 from moving from the operating position to the waiting position in the opposite direction of the first direction AD1. That is, the retaining member A210 holds the operating member A100 in the operating position. At the same time, the engaging portion A213 also abuts against the same groove wall of the groove A111c in the second direction AD2. The groove wall of the groove A111c restricts the rotation of the retaining member A210 in the second direction AD2, thereby holding the retaining member A210 in the retaining position. Optionally, the engaging portion A213 is configured as a generally triangular structure, and the groove A111c is configured as a triangular groove structure that matches the engaging portion A213, and is formed by recessing inward from the outer surface of the self-operating member A100 in the opposite direction to the second direction AD2.

[0364] refer to Figure 23 and Figure 24In one embodiment of this application, the receiving part A111 further includes a receiving groove A111d. When the operating member A100 is in the waiting position and the holding member A210 is in the holding position, the engaging part A213 can enter and be accommodated in the receiving groove A111d. The hole wall of the receiving groove A111d abuts against the engaging part A213 in the first direction AD1, thereby preventing the operating member A100 from sliding in the positive direction of the first direction AD1, that is, preventing the operating member A100 from moving from the waiting position to the operating position along the positive direction of the first direction AD1. Optionally, the receiving groove A111d has a first guide slope A1111 on its hole wall, and the engaging part A213 has a second guide slope A2131 that cooperates with the first guide slope A1111. Both the first guide slope A1111 and the second guide slope A2131 intersect the first direction AD1 and the second direction AD2. When the operating member A100 moves from the waiting position to the operating position along the positive direction of the first direction AD1, the first guide slope A1111 is adapted to push against the second guide slope A2131 to drive the retaining member A210 to pivot from the holding position to the release position along the positive direction of the second direction AD2. Optionally, the side of the receiving groove A111d opposite to the first guide slope A1111 is provided as an opening.

[0365] refer to Figure 23 In one embodiment of this application, the retainer A210 includes a pivot portion A270 pivotally connected to the housing A900. The pivot portion A270 is pivotally disposed on the first cover A300 and / or the second cover A500, and is at least partially disposed in the mounting cavity A310. The unlocking portion A211 is connected to the pivot portion A270, and a locking portion A213 is formed at one end of the unlocking portion A211 facing the operating member A100. Optionally, the pivot portion A270, the locking portion A213, and the unlocking portion A211 are an integral structure. Optionally, the retainer A210 is provided with a relief groove A2101, which can accommodate a portion of the housing A900 at the edge of the operating hole A320 when the retainer A210 is pivoted to the release position, thereby providing pivotable space for the retainer A210.

[0366] refer to Figure 23In one embodiment of this application, a pivot pin A271 is provided on the housing A900 and pivotally connected to the pivot portion A270. The pivot portion A270 is provided with a pivot hole A2701, and the pivot pin A271 passes through the pivot hole A2701 to pivotally engage with each other. Optionally, the pivot pin A271 is provided on the second cover A500, and the pivot pin A271 protrudes from the inner wall of the second cover A500 toward the mounting cavity A310, so as to pivotally mount the pivot portion A270 on the second cover A500. Those skilled in the art will understand that although the pivot pin A271 according to this embodiment is provided on the second cover A500, this is only exemplary. Depending on actual needs, the pivot pin A271 may also be provided on the first cover A300, or the pivot pin A271 may be fixedly connected to both the first cover A300 and the second cover A500. Those skilled in the art will also understand that the pivot pin A271 can also be provided on the pivot portion A270, and correspondingly, the pivot hole A2701 can be provided on at least one of the first cover A300 and the second cover A500.

[0367] refer to Figure 23In one embodiment of this application, the operating mechanism A10 is further provided with an elastic element A220, which can drive the retaining element A210 to rotate to the retaining position when the operating element A100 is in the operating position. In this embodiment, the elastic element A220 is connected to the retaining element A210 and can pivot relative to the housing A900 with the retaining element A210 and abut against the housing A900. Optionally, the retaining element A210 is connected to the pivoting part A270, and the housing A900 is provided with an abutting part A290 protruding toward the mounting cavity A310. The elastic element A220 abuts against the abutting part A290. Optionally, the abutting part A290 is provided on the second cover A500. Those skilled in the art will understand that although the abutment portion A290 according to this embodiment is provided on the second cover A500, this is merely exemplary. Depending on actual needs, the abutment portion A290 may also be provided on the first cover A300, or the abutment portion A290 may be fixedly connected to both the first cover A300 and the second cover A500. The elastic member A220 is made of a deformable material. When the elastic member A220 moves to the release position following the retaining member A210, the elastic member A220 undergoes elastic deformation and applies force to the pivot portion A270, causing the pivot portion A270 to tend to pivot toward the retaining position in the second direction AD2. Thus, the elastic member A220 restricts the retaining member A210 from pivoting toward the release position. When the engaging portion A213 aligns with the groove A111c or the receiving groove A111d in the second direction AD2, under the action of the elastic member A220, the pivoting portion A270 pivots in the opposite direction of the second direction AD2, causing the engaging portion A213 to enter the groove A111c or the receiving groove A111d. This causes the retaining member A210 to pivot to the retaining position. When the user needs to pivot the retaining member A210 to the release position, the elastic force provided by the elastic member A220 must be overcome. Optionally, the elastic member A220 can be any suitable elastic mechanism known in the art, such as a spring, sheet spring, or torsion spring. In this embodiment, by providing the receiving groove A111d, the user needs to apply a force sufficient to overcome the elastic force provided by the elastic member A220 to drive the retaining member A210 to pivot to the release position, thereby allowing the operating member A100 to slide towards the operating position in the positive direction of the first direction AD1, thus avoiding release caused by accidental contact with the operating portion A101. In other embodiments, the operating element A100 may also omit the receiving slot A111d.

[0368] refer to Figures 23 to 25In one embodiment of this application, the housing A900 further includes a bracket A180. The bracket A180 is at least partially disposed in the mounting cavity A310, and is fixedly connected to at least one of the first cover A300 and the second cover A500. In this embodiment, the trolley A1 further includes a drive member A410 for connecting the operating member A100 to the locking member A800, and the drive member A410 is operably connected to the operating member A100. Optionally, the drive member A410 is disc-shaped. The drive member A410 is pivotally disposed on the bracket A180 via a pivot axis A420, and thus pivotally disposed in the housing A900. Sliding of the operating member A100 along a first direction AD1 can drive the drive member A410 to pivot about a pivot axis AX2. Optionally, the operating member A100 is provided with a driving part A130, which extends away from the operating part A101 along a first direction AD1. A groove A131 is provided at the end of the driving part A130 away from the operating part A101, and the groove A131 extends at least along a third direction AD3. The driving member A410 is provided with a connecting part A411 corresponding to the driving part A130. The groove A131 fits over the connecting part A411. When the operating member A100 slides along the first direction AD1, the groove A131 pushes against the connecting part A411, and the connecting part A411 rotates about a pivot axis A420 (more precisely, about a pivot axis AX2). Optionally, relative to the groove A131, the connecting part A411 translates only along the path defined by the extension of the groove A131 along the third direction AD3. In other words, relative to the groove A131, the connecting part A411 slides only in the third direction AD3. Thus, the sliding of the operating member A100 from the unoperated position to the operating position in the first direction AD1 can drive the driving member A410 to pivot around the pivot axis AX2 from the initial position to the working position. In this embodiment, the connecting part A411 is configured as a pin-like structure. Optionally, the slide groove A131 and the connecting part A411 can also be configured with other structures, as long as the sliding of the operating member A100 in the first direction AD1 can drive the driving member A410 to pivot around the pivot axis AX2.

[0369] In one embodiment of this application, the trolley A1 further includes a traction member A802, which is connected to a locking member A800 and a drive member A410, such that the operating member A100 can be indirectly connected to the locking member A800 via the drive member A410 and the traction member A802, thereby indirectly driving the locking member A800 from a locked position to an unlocked position. Optionally, the drive member A410 is connected to one end of the traction member A802, so that the movement of the drive member A410 can drive the locking member A800 connected to the other end of the traction member A802 from a locked position to an unlocked position, allowing the wheel seat A710 to pivot relative to the frame A600. Optionally, the traction member A802 is made of materials such as steel wire or nylon rope. Optionally, in this embodiment, two traction members A802 are connected to the drive member A410, each traction member A802 being connected to one locking member A800. During the process of the operating member A100 sliding from the waiting position to the operating position in the first direction AD1, the driving member A410 pivots to the working position, thereby driving the two locking members A800 to move from the locked position to the unlocked position through the traction member A802.

[0370] The following is combined Figures 23 to 25 This describes the operation of the operating mechanism A10 according to one embodiment of the present application. Similar to the foregoing embodiments, for ease of description, [the following will be used]. Figure 24 The state shown is defined as the initial state of the operating mechanism A10. At this time, the operating member A100 is in the ready-to-operate position, the retaining member A210 is in the retaining position, the driving member A410 is in the initial position, the locking member A800 is in the locked position, the pivoting of the wheel seat A710 relative to the frame A600 is locked, and the wheel A720 is configured as a directional wheel (see reference). Figure 2 ).

[0371] When it is necessary to release the pivoting of the wheel seat A710 relative to the frame A600, the user presses the operating part A101 of the operating member A100, driving the operating member A100 to slide from the waiting position to the operating position along the positive direction of the first direction AD1 (e.g., Figure 24 and Figure 25As shown), the first guide slope A1111 of the receiving groove A111d pushes against the second guide slope A2131 of the retainer A210, driving the retainer A210 to pivot from the retaining position to the releasing position in the positive direction of the second direction AD2. This causes the engaging part A213 to disengage from the receiving groove A111d and align with the groove A111c in the second direction AD2. Under the action of the elastic member A220, the engaging part A213 enters the groove A111c. That is, the retainer A210 slides from the releasing position to the retaining position in the opposite direction of the second direction AD2. The retainer A210 holds the operating member A100 in the operating position. The sliding tendency of the operating member A100 in the opposite direction of the first direction AD1 caused by the first reset member A801 ​​is restricted by the retainer A210. The retainer A210 holds the operating member A100 in the operating position, and the engaging part A213 abuts against the groove wall of the groove A111c. Figure 25 As shown. At this point, the operating mechanism A10 enters the working state, and the user can release the pressure on the operating part A100. The slide groove A131 pushes against the connecting part A411, driving the driving part 411 to pivot from the initial position to the working position. The pivoting of the driving part 411, through the traction part A802, pulls the locking part A800 out of the first locking hole A701, and the locking part A800 enters the unlocked position. Since the operating part A100 is kept in the operating position, the locking part A800 is also kept in the unlocked position through the pushing cooperation of the slide groove A131 and the connecting part A411, so that the pivoting of the wheel seat A710 relative to the frame A600 is unlocked, and the wheel A720 is set as a swivel wheel.

[0372] When it is necessary to re-lock the pivoting of wheel seat A710 relative to frame A600, the user pushes the unlocking part A211 to drive retaining member A210 to pivot from the retaining position to the releasing position in the positive direction of second direction AD2. At this time, engaging part A213 disengages from groove A111c, and retaining member A210 no longer restricts the sliding of operating member A100 in the first direction AD1. The user pushes trolley A1 to rotate wheel seat A710 until the first locking hole A701 on wheel seat A710 aligns with the second locking hole A601 on frame A600. Under the action of first resetting member A801, locking member A800 enters the first locking hole A701 and enters the locked position. Simultaneously, under the action of the first reset member A801, the traction member A802 drives the drive member A410 to pivot. With the cooperation of the slide groove A131 and the connecting part A411, the pivoting drive operation member A100 of the drive member A410 slides from the operating position to the waiting position in the opposite direction of the first direction AD1. At this point, the operating mechanism A10 returns to the initial state.

[0373] In the operating mechanism A10 according to the embodiments of this application, by cooperating with the retainer A210 and the operating member A100, the user can keep the operating member A100 in the operating position without continuously applying external force to it, thereby continuously providing a holding force to the target device operably connected to the operating member A100 to keep the target device in a certain characteristic position, such as keeping the locking member A800 of the trolley A1 in the unlocked position.

[0374] Figures 26 to 32 This application illustrates an operating mechanism A10 for a trolley A1 according to yet another embodiment. In this embodiment, components such as the frame A600, wheel seats A710, wheels A720, locking member A800, first reset member A801, traction member A802, first locking hole A701, and second locking hole A601 in the trolley A1 are connected to... Figure 2 The corresponding components are the same in the illustrated embodiments, and their structures and connections will not be described again here. Figure 2 As shown in the embodiment, in this embodiment, the user can switch the locking member A800 to the unlocking position by operating the operating mechanism A10 and keep it in the unlocking position, so that the first element (e.g., the frame A600) and the second element (e.g., the wheel seat A710) are kept (e.g., pivotally connected) in an active connection.

[0375] refer to Figure 26 and Figure 32In one embodiment of this application, the operating mechanism A10 includes an operating member A100, a retaining member A210, and a housing A900. Both the operating member A100 and the retaining member A210 are movable relative to the housing A900. The operating member A100 moves relative to the housing A900 along a first direction AD1 between a ready-to-operate position and an operating position. The retaining member A210 moves relative to the housing A900 along a second direction AD2 between a retaining position and a released position. The retaining member A210 can also move together with the operating member A100 relative to the housing A900 between the ready-to-operate position and the operating position, and the first direction AD1 intersects the second direction AD2. Optionally, the operating member A100 is movably connected to the housing A900 and the retaining member A210. Optionally, the operating member A100 is rotatably connected to the housing A900 along the first direction AD1, while the retaining member A210 is slidably connected to the operating member A100 along the second direction AD2. The retainer A210 is rotatable relative to the housing A900 along the first direction AD1 with the operating member A100. In this embodiment, the operating member A100 is configured as a generally hollow cylindrical structure. The operating member A100 is rotatably connected to the housing A900 along the first direction AD1 about the axis AX4 of the cylinder. The retainer A210 is rotatable relative to the housing A900 along the first direction AD1 with the operating member A100 about the axis AX4 of the cylinder. The retainer A210 is also slidably connected to the operating member A100 along the second direction AD2 parallel to the axis AX4 of the cylinder, and slides relative to the housing A900 along the second direction AD2 parallel to the axis AX4 of the cylinder. Optionally, in this embodiment, the first direction AD1 is approximately the circumferential direction of the operating member A100, and the second direction AD2 is a direction parallel to the extension direction of the axis AX4 of the operating member A100 and intersects the circumferential direction of the operating member A100, so that the first direction AD1 can intersect the second direction AD2. It can be seen that in this embodiment, the first direction AD1 is the pivoting direction, while the second direction AD2 is a straight line direction, and the two intersect.

[0376] refer to Figures 30A to 32 In this embodiment, the same Figures 3 to 15 In the illustrated embodiment, the direction in which the operating member A100 moves from the position to the operating position along the first direction AD1 is defined as the positive direction of the first direction AD1, and the direction in which the operating member A100 moves from the operating position to the position to the operating position along the first direction AD1 is defined as the negative direction of the first direction AD1. In this embodiment, for example, in... Figure 30A and Figure 30B In this context, clockwise is the positive direction of the first direction AD1, and counterclockwise is the opposite direction of the first direction AD1. Figures 3 to 15In the illustrated embodiment, the direction of movement of the retainer A210 from the holding position to the release position in the second direction AD2 is defined as the positive direction of the second direction AD2, and the direction of movement of the retainer A210 from the release position to the holding position in the second direction AD2 is defined as the negative direction of the second direction AD2. In this embodiment, for example, in Figure 31 and Figure 32 In the middle, the horizontal direction to the right is the positive direction of the second direction AD2, and the horizontal direction to the left is the opposite direction of the second direction AD2.

[0377] Optionally, when the operating member A100 is in the waiting position (e.g., when the user has not yet rotated the operating member), the retaining member A210 is in the holding position, and a connection relationship is established between the retaining member A210 and the operating member A100 that can restrict the sliding of the operating member A100. For example, the retaining member A210 abuts against the operating member A100 in the first direction AD1, and the retaining member A210 prevents the operating member A100 from rotating in the first direction AD1, for example, preventing the operating member A100 from rotating from the waiting position to the operating position. When the operating member A100 rotates from the waiting position to the operating position along the positive direction of the first direction AD1 (for example, the position reached by the operating member A100 after the user rotates the operating member A100), and the retaining member A210 slides from the release position to the retaining position along the opposite direction of the second direction AD2, a connection relationship is established between the retaining member A210 and the operating member A100 that can restrict the rotation of the operating member A100. For example, the retaining member A210 abuts against the operating member A100 in the first direction AD1, and the retaining member A210 prevents the operating member A100 from rotating in the first direction AD1, for example, preventing the operating member A100 from rotating from the operating position to the waiting position along the opposite direction of the first direction AD1.

[0378] refer to Figures 27 to 29 Optionally, in one embodiment of this application, the housing A900 includes a receiving portion A111, the retaining member A210 includes an engaging portion A213, the operating member A100 is in the operating position, and the retaining member A210 is in the retaining position (see reference). Figure 30B and Figure 32When the receiving part A111 abuts against the engaging part A213 in the first direction AD1, and the engaging part A213 abuts against the operating member A100 in the first direction AD1, the retaining member A210 prevents the operating member A100 from rotating from the operating position to the waiting position in the opposite direction of the first direction AD1, and the operating member A100 is held in the operating position. Optionally, at this time, the engaging part A213 is housed in the receiving part A111 and the operating member A100 in the second direction AD2. When the receiving part A111 and the engaging part A213 no longer abut against each other in the first direction AD1, the retaining member A210 is in the released position, and the operating member A100 can rotate between the operating position and the waiting position in the first direction AD1. Optionally, at this time, the engaging part A213 disengages from the receiving part A111 in the second direction AD2. Optionally, in one embodiment of this application, the receiving part A111 includes a groove A111c. When the operating member A100 is in the operating position and the retaining member A210 is in the retaining position, the engaging part A213 can enter and be accommodated in the groove A111c in the opposite direction of the second direction AD2. The groove wall of the groove A111c abuts against the engaging part A213 in the first direction AD1, and the engaging part A213 abuts against the operating member A100 in the first direction AD1. Thus, the engaging part A213 restricts the rotation of the operating member A100 in the first direction AD1, thereby preventing the operating member A100 from rotating from the operating position to the waiting position in the opposite direction of the first direction AD1. That is, the retaining member A210 holds the operating member A100 in the operating position. Optionally, the engaging portion A213 also abuts against the bottom of the groove A111c in the opposite direction of the second direction AD2. The bottom of the groove A111c restricts the retaining member A210 from continuing to move in the opposite direction of the second direction AD2, thereby holding the retaining member A210 in the retaining position. Optionally, the engaging portion A213 is configured as a generally rectangular structure, and the groove A111c is configured as a rectangular groove structure that matches the engaging portion A213, and is formed by recessing inward from the outer surface of the housing A900 in the opposite direction of the second direction AD2.

[0379] refer to Figure 26 and Figure 27In one embodiment of this application, the receiving part A111 further includes a receiving groove A111d. When the operating member A100 is in the waiting position and the holding member A210 is in the holding position, the engaging part A213 can enter and be accommodated in the receiving groove A111d. The hole wall of the receiving groove A111d abuts against the engaging part A213 in the first direction AD1, and the engaging part A213 abuts against the operating member A100 in the first direction AD1. Thus, the holding member A210 prevents the operating member A100 from sliding in the positive direction of the first direction AD1, that is, it prevents the operating member A100 from moving from the waiting position to the operating position in the positive direction of the first direction AD1. Optionally, the receiving groove A111d has a first guide slope A391 on its hole wall, and the engaging part A213 has a second guide slope A2411 that cooperates with the first guide slope A391. Both the first guide slope A391 and the second guide slope A2411 intersect the first direction AD1 and the second direction AD2. When the operating member A100 rotates from the waiting position to the operating position along the positive direction of the first direction AD1, the first guide slope A391 is adapted to push against the second guide slope A2411 to drive the holding member A210 to pivot from the holding position to the release position along the positive direction of the second direction AD2.

[0380] Optionally, the operating member A100 is formed by the interlocking of a first semi-cylinder A102 and a second semi-cylinder A103. The housing A900 includes a first cover A300 and a second cover A500. The first cover A300 covers the first end A104 of the operating member A100 in the second direction AD2, and the second cover A500 covers the second end A105 of the operating member A100 in the second direction AD2, opposite to the first end A104. The first cover A300 and the second cover A500 are fixedly connected to the handle A610 of the trolley A1. Optionally, the first cover A300 and the second cover A500 can also be fixedly connected to other structures of the trolley A1; this application does not limit this. The first cover A300, the second cover A500, and the operating member A100 together define the mounting cavity A310. Figure 26 As shown, the operating member A100 is rotatable relative to the first cover A300 along the first direction AD1 between the waiting position and the operating position. The side of the first cover A300 facing the mounting cavity A310 is also provided with a groove A111c and a receiving groove A111d, and a guide slide portion A390 is also provided on the side of the first cover A300 facing the mounting cavity A310. The groove A111c and the receiving groove A111d are separated by the guide slide portion A390 in the first direction AD1. Optionally, the side of the guide slide portion A390 facing the receiving groove A111d is provided with a first guide slope A391, and the end of the engaging portion A213 facing the first cover A300 is provided with a second guide slope A2411 that cooperates with the first guide slope A391.

[0381] refer to Figure 26 and Figure 27 In one embodiment, the operating member A100 is provided with a retaining hole A923, and a retaining member A210 is movably disposed in the retaining hole A923, which extends along the second direction AD2. Optionally, the retaining member A210 is slidably disposed in the retaining hole A923 and is capable of sliding along the second direction AD2. The sliding trajectory of the retaining member A210 passes through at least a retaining position and a releasing position, that is, the retaining member A210 is slidably connected to the operating member A100. Optionally, the retaining member A210 is provided with an unlocking part A211. Regardless of whether the retaining member A210 is in the retaining position or the releasing position, at least a portion of the unlocking part A211 protrudes completely from the retaining hole A923, that is, protrudes from the operating member A100, so as to be pushed by the user, thereby driving the retaining member A210 to move along the second direction AD2 from the retaining position to the releasing position. Optionally, the unlocking part A211 and the engaging part A213 are integrally formed.

[0382] refer to Figure 26 and Figure 27Optionally, a hollow first mounting portion A920 is provided on the outer wall of the operating member A100. The first mounting portion A920 protrudes radially from the circumferential outer wall of the operating member A100 and extends along the second direction AD2. The hollow inner cavity of the first mounting portion A920 forms a first groove A921. An engaging portion A213 is disposed in the first groove A921 of the first mounting portion A920, and the retaining member A210 is slidable relative to the first mounting portion A920 along the second direction AD2 between a holding position and a releasing position. When the retaining member A210 slides in the second direction AD2, the engaging portion A213 located in the first groove A921 slides along the second direction AD2. A retaining hole A923 is provided on the first mounting portion A920 and communicates with the first groove A921. Optionally, the end of the first mounting portion A920 near the first end of the operating member A100 in the second direction AD2 is configured as an opening, which communicates with the first groove A921 inside the first mounting portion A920. This allows the engaging portion A213 to protrude from the opening from the operating member A100 and enter the receiving portion A111 on the housing A900. When the operating member A100 is rotated to the operating position, the retaining member A210 is aligned with the groove A111c in the second direction AD2. At this time, the retaining member A210 is slid to the retaining position, and the engaging portion A213 enters the groove A111c and abuts against the groove wall of the groove A111c in the first direction AD1. The engaging portion A213 is at least partially retained in the first groove A921 and abuts against the groove wall of the first groove A921 in the first direction AD1. Thus, the retainer A210 simultaneously abuts against the groove wall of the groove A111c and the groove wall of the first groove A921 in the first direction AD1, and the retainer A210 restricts the rotation of the operating member A100 relative to the first cover A300 in the first direction AD1, that is, the retainer A210 holds the operating member A100 in the operating position.

[0383] When the operating member A100 pivots to the ready-to-operate position, the retaining member A210 aligns with the receiving groove A111d in the second direction AD2. At this time, the retaining member A210 is slid to the retaining position, and the engaging portion A213 enters the receiving groove A111d and abuts against the wall of the receiving groove A111d in the first direction AD1. At least a portion of the engaging portion A213 remains in the first groove A921 and abuts against the groove wall of the first groove A921 in the first direction AD1. Thus, the retaining member A210 simultaneously abuts against the groove wall of the receiving groove A111d and the wall of the first groove A921 in the first direction AD1. The retaining member A210 restricts the rotation of the operating member A100 relative to the first cover A300 in the first direction AD1; that is, the retaining member A210 holds the operating member A100 in the ready-to-operate position. When the operating member A100 is in the ready-to-operate position and the retaining member A210 is in the retaining position, if the user drives the operating member A100 to rotate in the positive direction of the first direction AD1, the second guide slope A2411 of the engaging part A213 of the retaining member A210 pushes against the first guide slope A391 of the first cover A300 in the positive direction of the first direction AD1. Since the first cover A300 is fixed relative to the trolley A1, the reaction force of the first guide slope A391 on the second guide slope A2411 drives the retaining member A210 to slide in the first groove A921 in the positive direction of the second direction AD2 until the engaging part A213 disengages from the receiving groove A111d. The retaining member A210 no longer obstructs the rotation of the operating member A100 in the first direction AD1, and the operating member A100 can then rotate to the operating position. In other embodiments of this application, the retainer A210 may also be slidably disposed on the housing A900 (e.g., the first cover A300), while the receiving portion A111 may be disposed on the operating member A100. Optionally, the first groove A921 and the retaining hole A923 may be disposed on the first cover A300, while the receiving portion A111 (e.g., the groove A111c and the receiving slot A111d) may be disposed on the first mounting portion A920.

[0384] Continue to refer to Figures 26 to 29Optionally, the operating mechanism A10 further includes an elastic element A220, which can drive the retaining element A210 to slide to the retaining position when the operating element A100 is in the operating position and the waiting-to-operate position. In this embodiment, the elastic element A220 is used to drive the engaging portion A213 to be accommodated in the receiving portion A111. Optionally, the elastic element A220 is disposed between the operating element A100 and the retaining element A210, and is located on one side of the retaining element A210 along the second direction AD2. The elastic element A220 applies a pushing force to the retaining element A210, so that the retaining element A210 has a tendency to slide toward the retaining position. Optionally, the elastic element A220 is disposed in the first groove A921. One end of the elastic element A220 is integrally formed with the engaging portion A213, and the other end of the elastic element A220 abuts against the bottom of the first groove A921 (i.e., the other end of the first mounting portion A920 opposite to the end of the first mounting portion A920 with an opening in the second direction AD2).

[0385] refer to Figure 27 In one embodiment of this application, a first cover A300 and a second cover A500 are fixedly connected to a frame A600. Optionally, the first cover A300 and the second cover A500 are fixedly connected to a handlebar A610 of the frame A600. The handlebar A610 is at least partially disposed in a mounting cavity A310. The trolley A1 also includes a drive member A410 for connecting an operating member A100 to a locking member A800, and the drive member A410 is operably connected to the operating member A100. In this embodiment, the drive member A410 is configured as a drive pin. The handlebar A610 is provided with a fifth groove A183, which extends along a second direction AD2. The drive member A410 passes through the fifth groove A183 and can slide along the fifth groove A183 in the second direction AD2. The operating member A100 is provided with a fourth groove A930, which intersects with the first direction AD1 and the second direction AD2 and extends in a generally spiral manner. Optionally, the fourth groove A930 is located on the inner wall of the operating member A100 facing the mounting cavity A310. The end of the driving member A410 engages in the fourth groove A930. When the operating member A100 rotates along the first direction AD1, the groove wall of the fourth groove A930 drives the driving member A410 to slide between the initial position and the working position along the second direction AD2 in the fifth groove A183.

[0386] refer to Figure 31 and Figure 32The trolley A1 further includes a traction member A802, which is connected to a locking member A800 and a driving member A410, allowing the operating member A100 to be indirectly connected to the locking member A800 via the driving member A410 and the traction member A802, thereby indirectly driving the locking member A800 from a locked position to an unlocked position. Optionally, the driving member A410 is connected to one end of the traction member A802, and the sliding of the driving member A410 along the fifth groove A183 in the second direction AD2 can drive the locking member A800, which is connected to the other end of the traction member A802, to move from a locked position to an unlocked position.

[0387] Continue to refer to Figure 27 In one embodiment of this application, two drive members A410 are provided, each drive member A410 is connected to a traction member A802, thereby each drive member A410 is connected to a locking member A800. During the pivoting of the operating member A100 from the waiting position to the operating position in the first direction AD1, the two drive members A410 slide towards each other in the second direction AD2 from their initial positions to their working positions, thereby each drive member A410 drives a locking member A800 to move from a locked position to an unlocked position via the traction member A802.

[0388] The following is combined Figure 26 Figure 30 to Figure 32 This describes the operation of the operating mechanism A10 according to one embodiment of the present application. Similar to the foregoing embodiments, for ease of description, [the following will be used]. Figure 31 The state shown is defined as the initial state of the operating mechanism A10. At this time, the operating member A100 is in the ready-to-operate position, the retaining member A210 is in the retaining position, the driving member A410 is in the initial position, the locking member A800 is in the locked position, the pivoting of the wheel seat A710 relative to the frame A600 is locked, and the wheel A720 is configured as a directional wheel (see reference). Figure 2 ).

[0389] When it is necessary to release the pivoting of wheel seat A710 relative to frame A600, the user applies a torsional force to operating member A100, driving operating member A100 from the operating position (e.g., in the positive direction of the first direction AD1) along the positive direction of the first direction AD1. Figure 30A and Figure 31 (As shown) Rotate to the operating position (e.g.) Figure 30B and Figure 32As shown), the first guide slope A391 of the receiving groove A111d pushes against the second guide slope A2411 of the retainer A210, driving the retainer A210 to slide from the retaining position to the releasing position in the positive direction of the second direction AD2. This causes the engaging part A213 to disengage from the receiving groove A111d and align with the groove A111c in the second direction AD2. Under the action of the elastic member A220, the engaging part A213 enters the groove A111c. That is, the retainer A210 moves along the second direction AD2. The operating member A100 slides from the release position to the holding position in the opposite direction. The holding member A210 holds the operating member A100 in the operating position, and the engaging part A213 abuts against the groove wall of the groove A111c and the groove wall of the first groove A921. The rotation tendency of the operating member A100 along the opposite direction of the first direction AD1 caused by the first reset member A801 ​​is restricted by the cooperation of the fourth groove A930, the fifth groove 183 and the driving member A410. Thus, the locking member A800 is held in the unlocked position, and the holding member A210 holds the operating member A100 in the operating position. At this point, the operating mechanism A10 enters the working state, and the user can release the torsional force on the operating member A100. During the pivoting process of the operating member A100 from the waiting position to the operating position along the positive direction of the first direction AD1, the groove wall of the fourth groove A930 drives the driving member A410 to slide from the initial position to the working position in the fifth groove 183 along the second direction AD2. The drive component A410 drives the locking component A800 to the unlock position through the traction component A802, thereby unlocking the pivoting of the wheel seat A710 relative to the frame A600, and the wheel A720 is set as a swivel wheel.

[0390] When it is necessary to re-lock the rotation of wheel seat A710 relative to frame A600, the user pushes the unlocking part A211 to drive retaining member A210 to pivot from the retaining position to the releasing position in the positive direction of second direction AD2. At this time, engaging part A213 disengages from groove A111c, and in the first direction AD1, retaining member A210 no longer restricts the rotation of operating member A100 in the first direction AD1. The user pushes trolley A1 to rotate wheel seat A710 until the first locking hole A701 on wheel seat A710 aligns with the second locking hole A601 on frame A600. Under the action of first resetting member A801, locking member A800 enters the first locking hole A701 and enters the locked position. Simultaneously, under the action of the first reset member A801, the traction member A802 drives the drive member A410 to slide. With the cooperation of the fourth groove A930, the fifth groove A183, and the drive member A410, the sliding of the drive member A410 drives the operating member A100 to rotate from the operating position to the waiting position in the opposite direction of the first direction AD1. After the operating member A100 rotates, the user can release the pushing force on the unlocking part A211. When the operating member A100 rotates to the waiting position, under the action of the elastic member A220, the holding member A210 slides from the release position to the holding position in the opposite direction of the second direction, and the engaging part A213 enters the receiving groove A111d to hold the operating member A100 in the waiting position. At this point, the operating mechanism A10 returns to its initial state.

[0391] In the operating mechanism A10 according to the embodiments of this application, by cooperating with the retainer A210 and the operating member A100, the user can keep the operating member A100 in the operating position without continuously applying external force to it, thereby continuously providing a holding force to the target device operably connected to the operating member A100 to keep the target device in a certain characteristic position, such as keeping the locking member A800 of the trolley A1 in the unlocked position.

[0392] refer to Figures 33 to 34BThis application provides an operating mechanism B10 for a trolley B1. The trolley B1 includes a frame B19, a wheel seat B24 pivotally connected to the frame B19, a wheel B25 pivotally connected to the wheel seat B24, and an operating mechanism B10 mounted on the frame B19. The frame B19 includes a pivot seat B23 pivotally connected to the wheel seat B24. The wheel B25 is steered through the pivot connection between the pivot seat B23 and the wheel seat B24. The operating mechanism B10 is mounted on the frame B19 of the trolley B1. The frame B19 includes a handlebar B171, and the operating mechanism B10 is mounted on the handlebar B171, for example. Optionally, the operating mechanism B10 can be positioned anywhere on the trolley B1, depending on actual needs. The operating mechanism B10 is connected to the steering locking mechanism of the wheel B25 via a traction member B20, such as a steel wire or nylon rope. Optionally, the steering locking mechanism includes a locking pin B21 and a locking groove B22 disposed on the wheel seat B24. The operating member B11 of the operating mechanism B10 is connected to the locking pin B21 via a traction member B20. By pressing the operating member B11 of the operating mechanism B10, the user pulls the traction member B20, thereby pulling the locking pin B21 out of the locking groove B22 on the wheel seat B24, thus releasing the steering locking mechanism of the wheel B25, that is, allowing the wheel seat B24 to pivot relative to the pivot seat B23. The locking pin B21 is connected to a reset member B26, which continuously applies a spring force to the locking pin B21, causing the locking pin B21 to tend to slide toward the locking groove B22. Optionally, the reset member B26 can be a spring, torsion spring, or spring sheet, etc. In other words, when the traction member B20 no longer applies tension to the locking pin B21, the locking pin B21 can automatically return to the locking groove B22 under the action of the reset member B26, and the wheel seat B24 can no longer pivot relative to the pivot seat B23, that is, the steering locking mechanism that locks the wheel B25. Those skilled in the art will understand that although the stroller B1 shown in the accompanying drawings is a children's stroller, this is merely exemplary, and the stroller B1 can be any stroller, such as a camping trailer, shopping cart, etc., and this application does not limit it; furthermore, although the accompanying drawings show a steering locking mechanism for releasing the wheel B25 using the operating mechanism B10, this is merely exemplary. The operating mechanism B10 according to the embodiments of this application is intended to provide pulling force to a target device via the traction member B20. The target device can be the locking pin B21 of the steering locking mechanism of the wheel B25, or other devices on the stroller, such as the locking member of the handlebar telescopic mechanism, the locking member of the foot pivot mechanism, etc., and this application does not limit it; and those skilled in the art can choose to include or omit the traction member B20 according to actual needs, and this application does not limit it.

[0393] refer to Figures 35A to 37In one embodiment of this application, the operating mechanism B10 includes a housing B14 and an operating component B11. Optionally, the housing B14 is assembled from a first housing B145 and a second housing B146. The housing B14 is disposed on and fixedly connected to the frame B19, for example, sleeved on the rider's handlebar to facilitate user operation of the operating component B11. The interior of the housing B14 is hollow to form an installation space B141. This installation space B141 is adapted to provide space for the installation of other components of the operating mechanism B10 and the rider B171. The housing B14 also has an installation opening B142, which communicates with the installation space B141 and is used for inserting the operating component B11 into it for installation. For ease of description, this application introduces the directional terms: first sliding direction BD1 and second sliding direction BD2. Unless explicitly defined, the term "direction" in these directional terms should be interpreted broadly, and can include two directions extending along any virtual straight line and facing opposite directions. In this application, such two directions facing opposite directions are expressed as "positive direction" and "opposite direction". For example, in this application, "sliding along the first sliding direction BD1" means that sliding can occur either along the positive direction of the first sliding direction BD1 or along the opposite direction of the first sliding direction BD1. This application also introduces the directional terms: first rotation direction BR1 and second rotation direction BR2, wherein the first rotation direction BR1 and the second rotation direction BR2 are rotation directions facing opposite directions.

[0394] refer to Figure 36 The operating element B11 is slidably disposed in the mounting opening B142 along the first sliding direction BD1, and the operating element B11 includes a body B119 and a first stop B118. The body B119 is configured to be at least partially exposed outside the housing B14 to form a button for the user to press. The first stop B118 is disposed within the mounting opening B142, and a second stop B143 is disposed within the mounting opening B142. The first stop B118 abuts against the second stop B143 to prevent the operating element B11 from detaching from the housing B14. Optionally, the operating mechanism B10 further includes a bracket B15, which is fixedly disposed on the housing B14, thereby fixing the bracket B15 to the frame B19. Optionally, the bracket B15 is disposed inside the rider B171 and fixedly connected to the housing B14 sleeved outside the rider B171.

[0395] Continue to refer to Figure 36 and Figure 37In one embodiment of this application, the operating mechanism B10 further includes a drive member B12 and a holding device B13. The drive member B12 is operatively connected to the operating member B11, and sliding of the operating member B11 is capable of driving the drive member B12 from an initial position to a holding position. The holding device B13 is connected to the drive member B12 to hold the drive member B12 in the holding position. The drive member B12 is pivotable relative to the trolley B1. Optionally, the main body B120 of the drive member B12 is configured as a generally disc-shaped structure. The drive member B12 is pivotally mounted on the bracket B15 via a pivot pin B127. Optionally, the main body B120 is provided with a shaft hole B129, and the bracket B15 is provided with a pivot hole B152. A pivot pin B127 is inserted into the shaft hole B129 and the pivot hole B152 to pivotally mount the drive member B12 on the bracket B15. Thus, the drive member B12 can pivot about a first pivot axis BX1 between an initial position and a holding position. The main body B120 is also provided with a protrusion B121, and the operating member is provided with a pushing part B110 adapted to push against the protrusion B121 to drive the drive member B12 to pivot from the initial position to the holding position. For example, as... Figure 37 and Figure 38 As shown, the driving member B12 is in the initial position, and the operating member B11 is in the first position. When the user presses the operating member B11, it slides from the first position toward the second position. The operating member B11 pushes against the protrusion B121, driving the driving member B12 along the first rotation direction BR1 (see reference). Figure 38 The drive element B12 can be pivoted from the initial position to the holding position. Alternatively, in some embodiments of this application, the drive element B12 can also be directly pivotally mounted on the housing B14 without the need for the bracket B15.

[0396] refer to Figure 38 and Figure 39 , Figure 38 The diagram shows the operating mechanism B10 before the user presses the operating element B11. At this time, the operating element B11 is in the first position and the driving element B12 is in the initial position. Figure 39 The diagram illustrates the operating mechanism B10 when a user first presses the operating member B11. At this time, the operating member B11 slides to a second position along the positive direction of the first sliding direction BD1, and the driving member B12 pivots to a holding position along the first rotation direction BR1. Optionally, the holding device B13 includes a locking member B131 and a linkage member B132. The locking member B131 is configured to pivot relative to the driving member B12 between a locked position and an unlocked position, and the locking member B131 is adapted to hold the driving member B12 in the holding position. The linkage member B132 is pivotally disposed relative to the driving member B12, and the pivoting of the linkage member B132 drives the locking member B131 to rotate from the locked position to the unlocked position.

[0397] Optionally, the linkage B132 is configured as a generally disc-shaped structure. The linkage B132 is pivotally mounted on the bracket B15 via a pivot pin B127. Optionally, the linkage B132 is provided with a shaft hole B139 into which the pivot pin B127 is inserted to pivotally mount the linkage B132 on the bracket B15, thereby allowing the linkage B132 to pivot about a first pivot axis BX1, for example, between a first linkage position and a second linkage position. In this embodiment, the linkage B132 and the drive member B12 pivot about the same first pivot axis BX1. Optionally, the linkage B132 can also be directly pivotally mounted on the housing B14 together with the drive member B12, without the need for the bracket B15.

[0398] refer to Figure 38 When the user has not pressed the operating component B11, the locking component B131 is in the locked position, and the linkage component B132 is in the first linkage position. (Reference) Figure 39 When the user presses the operating component B11 for the first time, the locking component B131 pivots from the locked position to the unlocked position and then pivots back to the locked position. The linkage component B132 disengages from the first linkage position but has not yet pivoted to the second linkage position. These details will be described in detail later. (Reference) Figures 36 to 38 The locking member B131 is provided with a first reset device B1311, which continuously applies an elastic force to the locking member B131, causing the locking member B131 to tend to pivot toward the locked position. Optionally, the first reset device B1311 can be a spring, torsion spring, or spring sheet. The housing B14 is provided with a mounting base B1312, which has a limit protrusion B1313. The locking member B131 is pivotally disposed in the mounting base B1312 to pivot between the locked and unlocked positions about a second pivot axis BX2. (Reference) Figure 38 When the locking member B131 pivots from the unlocked position to the locked position, the limiting protrusion B1313 abuts against the locking member B131 to prevent the locking member B131 from continuing to pivot away from the unlocked position. Optionally, the locking member B131 is provided with a limiting recess B1315, which cooperates with the limiting protrusion B1313 to limit the pivoting of the locking member B131. The limiting recess B1315 and the limiting protrusion B1313 are designed to prevent the locking member B131 from pressing against the driving member B12 and / or the linkage member B132 due to excessive pivoting of the locking member B131.

[0399] refer to Figures 36 to 38 When the drive unit B12 is in its initial position (reference) Figure 37 and Figure 38When the first reset device B1311 is activated, the locking member B131 is in the locked position. Optionally, the cooperation between the limiting recess B1315 and the limiting protrusion B1313 ensures that the locking member B131 in the locked position does not contact or only slightly contacts the driving member B12 and / or the linkage member B132. The driving member B12 is provided with a snap-fit ​​portion B122 protruding from the outer periphery of the main body portion B120 of the driving member B12, and a first snap-fit ​​groove B123 is formed between the snap-fit ​​portion B122 and the main body portion B120. Figure 36 As shown, the main body B120 of the driving member B12 is, for example, disc-shaped, and the engaging portion B122 protrudes outward from the outer periphery of the disc-shaped main body B120. A first engaging groove B123 is formed between the main body B120 and the engaging portion B122 of the driving member B12. When the driving member B12 pivots from the initial position toward the holding position along the first rotation direction BR1, the engaging portion B122 pushes against the locking member B131, thereby driving the locking member B131 to pivot from the locked position to the unlocked position. When the driving member B12 pivots to the holding position, under the action of the first reset device B1311, the locking member B131 pivots back to the locked position and enters the first engaging groove B123 to prevent the driving member B12 from moving along the second rotation direction BR2 (refer to the first rotation direction BR1) opposite to the first rotation direction BR1. Figure 38 Pivoting. Those skilled in the art will understand that in the illustrations of the various embodiments of this application, the first rotation direction BR1 and the second rotation direction BR2 are counterclockwise and clockwise, respectively. However, this is only exemplary, and the first rotation direction BR1 and the second rotation direction BR2 can also be clockwise and counterclockwise, respectively. This application does not limit this.

[0400] refer to Figure 36 and Figure 41 In this embodiment, the linkage B132 and the driving member B12 are drivably connected to each other. Optionally, the linkage B132 is provided with a connecting post B1322, and the driving member B12 is provided with an arc-shaped slide groove B124, into which the connecting post B1322 is inserted. When the driving member B12 and the linkage B132 pivot relative to each other, the connecting post B1322 and the arc-shaped slide groove B124 can move relative to each other along the path defined by the arc-shaped slide groove B124. Further, the linkage B132 is also provided with a pushing end B1321. When the driving member B12 is in the holding position and the operating member B11 slides from the first position toward the third position (different from the second position), the operating member B11 pushes against the connecting post B1322, and the connecting post B1322 pushes against the end of the arc-shaped slide groove B124. The operating member B11 drives the linkage member B132 and the driving member B12 to pivot along the first rotation direction BR1. The linkage member B132 then drives the locking member B131 to pivot from the locked position toward the unlocked position. Figure 41As shown, when the operating member B11 reaches the third position, the locking member B131 pivots to the unlocking position, and the locking member B131 disengages from the first locking slot B123. At this time, the driving member B12 disengages from the holding position and pivots at a certain angle along the first rotation direction BR1 so that the locking member B131 disengages from the first locking slot B123.

[0401] Those skilled in the art will understand that the third position is any suitable position between the first and second positions on the first sliding direction BD1. Therefore, whether sliding from the first position towards the third position or from the first position towards the second position, the sliding direction of the operating member B11 is the same, that is, sliding along the positive direction of the first sliding direction BD1. Optionally, refer to Figure 37 In the embodiment where bracket B15 is provided, bracket B15 is further provided with a limiting groove B152 that mates with connecting post B1322. When connecting post B1322 abuts against the groove wall of limiting groove B152, the pivoting of linkage B132 along the first rotation direction BR1 is restricted. Optionally, when locking member B131 pivots to the unlocked position, connecting post B1322 abuts against the groove wall of limiting groove B152.

[0402] refer to Figure 36 and Figure 38 In this embodiment, the operating mechanism B10 further includes a first elastic device B16. One end of the first elastic device B16 is connected to the linkage B132, and the other end of the first elastic device B16 is connected to the housing B14. Optionally, the first elastic device B16 is connected to a connecting end B161 disposed in the housing B14, and the connecting end B161 is, for example, columnar. The first elastic device B16 is intended to continuously apply an elastic force to the linkage B132, so that the linkage B132 has a tendency to pivot along the first rotation direction BR1. Optionally, the first elastic device B16 may be a spring, torsion spring, sheet spring, etc. In this embodiment, the operating mechanism B10 may optionally include a third reset device B117. One end of the third reset devi...

Claims

1. An operating mechanism, characterized in that, include: An operating element configured to move along a first direction between a position to be operated and an operating position; and The retainer is configured to move along a second direction between a retaining position and a releasing position. Wherein, the first direction intersects with the second direction. When the retainer is in the retaining position, the operating member abuts against the retainer in the first direction, and the retainer prevents the operating member from moving from the operating position to the waiting position. When the retainer is in the releasing position, the operating member can move between the operating position and the waiting position.

2. The operating mechanism according to claim 1, characterized in that, The operating component includes a receiving unit. The retaining element includes an engaging portion. When the retainer is in the retaining position, the engaging portion is accommodated in the receiving portion, and the engaging portion abuts against the receiving portion in the first direction to prevent the operating member from moving from the operating position to the waiting-to-operate position. When the retainer is in the releasing position, the engaging portion disengages from the receiving portion.

3. The operating mechanism according to claim 2, characterized in that, The receiving part includes a through hole. When the retainer is in the retaining position, the engaging portion is received in the through hole, and the wall of the through hole abuts against the engaging portion in the first direction. When the retainer is in the releasing position, the engaging portion disengages from the through hole. The retaining member further includes a limiting portion, which is located on one side of the engaging portion in the second direction and protrudes from the engaging portion on a plane intersecting the second direction. When the retainer is in the retaining position, the limiting portion abuts against the operating member in the second direction.

4. The operating mechanism according to claim 3, characterized in that, The operating member is provided with a receiving groove, and the limiting part is received in the receiving groove. When the retaining member moves along the second direction, the limiting part is in the receiving groove and moves along the second direction. The receiving groove has a first groove wall and a second groove wall, the second groove wall and the first groove wall being opposite to each other in the second direction, and the through hole being provided in the first groove wall. When the retainer is in the retaining position, the limiting portion abuts against the first groove wall in the second direction.

5. The operating mechanism according to claim 4, characterized in that, When the retainer is in the released position, the limiting portion abuts against the second groove wall in the second direction.

6. The operating mechanism according to claim 4, characterized in that, The second tank wall is provided with clearance holes, which extend along the first direction. The operating mechanism further includes an elastic member that abuts against the retaining member, the elastic member driving the engaging portion to be accommodated in the through hole; When the operating member moves in the first direction, the elastic member and / or the retaining member are located in the clearance hole.

7. The operating mechanism according to claim 3, characterized in that, The operating component is provided with a sliding hole that extends along the first direction and communicates with the through hole in the first direction. The retaining member is provided with a transition portion. In the second direction, the transition portion and the limiting portion are located on opposite sides of the engaging portion. When the operating member moves in the first direction, the transition portion is accommodated in the sliding hole.

8. The operating mechanism according to claim 4, characterized in that, The receiving groove is provided with two guide ribs spaced apart, each guide rib being connected to at least one of the first groove wall and the second groove wall, and extending along the first direction. The limiting part is located between the two guide ribs, and the limiting part guides the movement of the operating member in the first direction.

9. The operating mechanism according to claim 2, characterized in that, Also includes: The housing, wherein the operating element moves relative to the housing between the intended operating position and the operating position; The retainer moves relative to the housing between the retaining position and the releasing position.

10. The operating mechanism according to claim 9, characterized in that, The housing is provided with an operating hole, and the operating member moves in the operating hole along the first direction between the operating position and the operating position; the housing is provided with a retaining hole, and the retaining member moves in the retaining hole along the second direction between the retaining position and the releasing position.

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