Intermittent motion device, wheel locking structure and buggy

Abstract

The utility model discloses an intermittent motion device, a wheel locking structure and a buggy. The intermittent motion device comprises a mounting base, an operating part, a driving part and a locking part. A central angle corresponding to a first contour line of the end face of one side, back to the central axis, of each first locking tooth is alpha, a central angle corresponding to a second contour line of the end face of one side, back to the central axis, of each second locking tooth is beta, and alpha is smaller than beta; the tooth crest of the first locking tooth is closer to the central axis than the tooth crest of the second locking tooth. When the operating piece moves from the initial position to the acting position, the driving piece rotates around the central axis along with the operating piece to push the locking piece, so that the locking piece is in contact with the end face, back to one side of the central axis, of a first locking tooth, or the locking piece is in contact with the end face, back to one side of the central axis, of a second locking tooth. A user applies acting force of different magnitudes to the operating part, so that the buggy is switched between the brake release state and the brake state, and the use convenience of the buggy can be effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of children's vehicles, and particularly to an intermittent motion device, a wheel locking structure, and a children's vehicle. Background Art

[0002] A children's vehicle includes a frame and a wheel locking mechanism. The wheel locking mechanism includes a wheel, a parking pedal, and a parking block; the wheel is connected to the frame and is provided with a locking groove, the parking pedal is connected to the frame, and the parking block is connected to the parking pedal. The children's vehicle has a brake release state and a braking state; by applying a force to the parking pedal, the user rotates the parking pedal so that the parking block connected to the parking pedal is inserted into the locking groove, making the wheel unable to rotate and in the braking state; similarly, by applying a force to the parking pedal, the user rotates the parking pedal so that the parking block connected to the parking pedal disengages from the locking groove, making the wheel able to rotate and in the brake release state.

[0003] However, due to the limitations of its own structure, when the children's vehicle switches from the braking state to the brake release state, or from the brake release state to the braking state, the magnitude of the force applied to the parking pedal in the related art is single, which is not convenient for the user to operate. Summary of the Utility Model

[0004] The embodiments of this application provide an intermittent motion device, a wheel locking structure, and a children's vehicle, which can solve the problem that due to the limitations of its own structure, when the children's vehicle switches from the braking state to the brake release state, or from the brake release state to the braking state, the magnitude of the force applied to the parking pedal is single, which is not convenient for the user to operate in the related art.

[0005] In a first aspect, the embodiments of this application provide an intermittent motion device; the intermittent motion device includes a mounting seat, an operating member, a driving member, and a locking member. The mounting seat defines a central axis. The operating member is disposed on the mounting seat, and the operating member can reciprocate relative to the mounting seat around the central axis between an initial position and an operating position. The driving member is disposed inside the mounting seat. On the side of the driving member facing the operating member, there are a plurality of first locking teeth and a plurality of second locking teeth alternately arranged around the central axis. The central angle corresponding to the first contour line of the end face on the side of the first locking tooth facing away from the central axis is α, and the central angle corresponding to the second contour line of the end face on the side of the second locking tooth facing away from the central axis is β, and α < β. The tooth tip of the first locking tooth is closer to the central axis than the tooth tip of the second locking tooth. The locking member is rotatably connected to the operating member. Wherein, when the operating member moves from the initial position to the operating position, the driving member rotates around the central axis following the operating member to push against the locking member, so that the locking member contacts the end face on the side of one of the first locking teeth facing away from the central axis, or the locking member contacts the end face on the side of one of the second locking teeth facing away from the central axis.

[0006] Based on the intermittent motion device of the embodiments of the present application, by reasonably designing the central angle α corresponding to the first contour line of the end face on the side of the first locking tooth away from the central axis and the central angle β corresponding to the second contour line of the end face on the side of the second locking tooth away from the central axis, such that α < β, and cooperating with setting the tooth top of the first locking tooth closer to the central axis than the tooth top of the second locking tooth; when the locking member contacts the end face on the side of a first locking tooth away from the central axis, at this time, the user only needs to apply a relatively small force to the operating member to make the driving member rotate to push against the locking member, so that the locking member crosses the first locking tooth and abuts against the end face on the side of the second locking tooth adjacent to the first locking tooth away from the central axis; when the locking member contacts the end face on the side of a second locking tooth away from the central axis, at this time, the user needs to apply a relatively large force to the operating member to make the driving member rotate to push against the locking member, so that the locking member crosses the second locking tooth and abuts against the end face on the side of the first locking tooth adjacent to the second locking tooth away from the central axis; in this way, the user needs to apply different magnitudes of force to the operating member to switch the baby carriage between the brake release state and the braking state; compared with the user applying a single magnitude of force to the operating member to switch the baby carriage between the brake release state and the braking state, the usability of the baby carriage can be effectively improved.

[0007] In some of the embodiments, 27 degrees ≤ α ≤ 35 degrees, 37 degrees ≤ β ≤ 45 degrees.

[0008] Based on the above embodiments, by reasonably designing the central angle α corresponding to the first contour line of the end face on the side of the first locking tooth away from the central axis and the central angle β corresponding to the second contour line of the end face on the side of the second locking tooth away from the central axis, such that the central angles α and β satisfy the above conditional formula, in this way, the angles of the central angles α and β are neither too large nor too small, so as to facilitate the user to apply different magnitudes of force to the operating member to achieve the switching of the baby carriage between the brake release state and the braking state.

[0009] In some of the embodiments, the mounting seat has a disk-shaped surface opposite to the operating member, the disk-shaped surface is provided with an arc-shaped limiting groove, the center of the arc-shaped limiting groove falls on the central axis, the intermittent motion device further includes a bracket and a first elastic member, at least a part of the bracket is disposed on the side of the mounting seat away from the operating member, a part of the operating member passes through the arc-shaped limiting groove and is fixedly connected to the bracket, and the first elastic member is disposed in the arc-shaped limiting groove and abuts between an end wall of the arc-shaped limiting groove and the bracket to bias the operating member towards the initial position.

[0010] Based on the above embodiment, by designing a bracket, the bracket is used to realize the connection between the operating member and the mounting seat; by designing the first elastic member, when the operating member moves from the initial position to the action position, the first elastic member is compressed and has an elastic restoring force. When the external force acting on the operating member is removed, the operating member can rotate around the central axis relative to the mounting seat to the above-mentioned initial position under the action of the elastic restoring force of the first elastic member, thereby realizing automatic resetting of the operating member.

[0011] In some of the embodiments, the central angle corresponding to the third contour line of the arc surface of the arc-shaped limiting groove on the side close to the central axis is γ, and γ<α+β.

[0012] Based on the above embodiments, it is easy to switch the baby stroller between the brake release state and the brake state.

[0013] In some embodiments, the operating member has a bottom wall and a side wall arranged around the bottom wall; the locking member is rotatably connected to the bottom wall, and the intermittent motion device also includes a second elastic member, which is arranged between the side wall and the locking member to bias the locking member toward the first locking tooth or the second locking tooth.

[0014] Based on the above embodiment, by designing the second elastic member, the user applies a force to the operating member, the driving member rotates to push the locking member, and the locking member rotates to squeeze the second elastic member so that the second elastic member has an elastic restoring force. When the locking member passes over the first locking tooth (second locking tooth), the locking member rotates under the action of the elastic restoring force to abut the end face of the second locking tooth (first locking tooth) adjacent to the first locking tooth (second locking tooth) on the side facing away from the central axis, so as to achieve relative fixation of the position between the driving member and the mounting seat.

[0015] In some embodiments, the operating member further includes a limiting protrusion, which is disposed on the bottom wall and is located on a side of the locking member away from the second elastic member.

[0016] Based on the above embodiment, by designing the limiting protrusion, the limiting protrusion can limit the locking member, so as to reduce or even avoid the possibility that the locking member rotates too much due to the excessive elastic restoring force of the second elastic member.

[0017] In the second aspect, an embodiment of the present application provides a wheel locking structure; the wheel locking structure includes a wheel, a brake pin and the above-mentioned intermittent motion device, the wheel is rotatably connected to the mounting seat around the central axis, a parking hole is provided on the side of the wheel facing the mounting seat, the wheel and the operating member are located on opposite sides of the driving member, the brake pin is arranged in the mounting seat, the brake pin is located between the driving member and the wheel, and the brake pin can move axially between a parking position and a non-parking position, in the parking position, the brake pin is inserted into the parking hole to prevent the wheel from rotating, in the non-parking position, the brake pin withdraws from the parking hole to allow the wheel to rotate, wherein the driving member is rotatably connected in the mounting seat and abuts against the end of the brake pin, and the driving member has a plurality of parking portions extending toward the wheel and a plurality of non-parking portions recessed away from the wheel on the side abutting the brake pin, the plurality of parking portions and the plurality of non-parking portions are alternately arranged around the central axis, in the parking position, the end of the brake pin abuts against the parking portion, and in the non-parking position, the end of the brake pin abuts against the non-parking portion.

[0018] The wheel locking structure according to the embodiment of the present application has the above-mentioned intermittent motion device, and the driving member rotates to make the parking part and the non-parking part alternately abut against the end of the brake pin; in the parking position, the end of the brake pin abuts against the parking part, and the brake pin is inserted into the parking hole to prevent the wheel from rotating. At this time, the baby stroller is in the above-mentioned braking state, and the user can release the handle of the baby stroller with both hands as needed; in the non-parking position, the end of the brake pin abuts against the non-parking part, and the brake pin withdraws from the parking hole to allow the wheel to rotate. At this time, the baby stroller is in the above-mentioned brake release state, and the user can push the baby stroller as needed. The user applies different forces to the operating member to make the operating member move from the initial position to the action position, so that the baby stroller can switch between the brake release state and the brake state; compared with the user applying a single force to the operating member to achieve the switching of the baby stroller between the brake release state and the brake state, the convenience of using the baby stroller can be effectively improved.

[0019] In some of the embodiments, the parking portion is provided with a positioning groove; in the parking position, the end of the brake pin extends into the positioning groove.

[0020] Based on the above embodiment, by designing a positioning groove, when the brake pin is in the parking position, the groove wall of the positioning groove can limit the brake pin, so that the brake pin will not be separated from the parking part due to a small rotation of the driving part, so as to ensure the stability of the connection between the brake pin and the parking hole when it is in the parking position, thereby ensuring the reliability of the children's car when it is in the braking state.

[0021] In some of the embodiments, the non-parking portion has a first abutment slope and a second abutment slope arranged around the central axis, the inclination angle of the first abutment slope is smaller than the inclination angle of the second abutment slope, the end of the brake pin transitions from the non-parking portion to the parking portion via the first abutment slope, and the end of the brake pin transitions from the parking portion to the non-parking portion via the second abutment slope.

[0022] Based on the above embodiments, by designing the inclination angle of the first abutting inclined surface to be smaller than that of the second abutting inclined surface, when the brake pin transitions from the non-parking part to the parking part via the first abutting inclined surface, the movement path of the brake pin on the first abutting inclined surface with a smaller inclination angle is longer, and the brake pin can be inserted into the parking hole relatively slowly under the pushing action of the first abutting inclined surface. When the brake pin transitions from the parking part to the non-parking part via the second abutting inclined surface, the movement path of the brake pin on the second abutting inclined surface with a larger inclination angle is shorter, and the brake pin can exit the parking hole relatively quickly under the action of the second abutting inclined surface. In this way, the slow-in and fast-out of the brake pin can be realized, achieving the effect of saving effort.

[0023] In a third aspect, an embodiment of the present application provides a children's vehicle; the children's vehicle includes a frame, a front wheel, a rear wheel, and the above-mentioned wheel locking structure. The front wheel and the rear wheel are arranged below the frame, and the wheel is either the front wheel or the rear wheel.

[0024] Based on the children's vehicle of the embodiment of the present application, having the above-mentioned wheel locking structure, the user applies different forces to the operating member to move the operating member from the initial position to the acting position, so as to switch the children's vehicle between the brake release state and the braking state; compared with the user applying a single magnitude of force to the operating member to switch the children's vehicle between the brake release state and the braking state, the use convenience of the children's vehicle can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is a partial structural schematic diagram of a children's vehicle in an embodiment of the present application;

[0027] Figure 2 It is a structural schematic diagram of a wheel locking structure in an embodiment of the present application;

[0028] Figure 3 It is an exploded structural schematic diagram of an intermittent motion device in an embodiment of the present application;

[0029] Figure 4 is Figure 3 a structural schematic diagram from another perspective;

[0030] Figure 5Schematic diagram of the locking member cooperating with the first locking tooth in an embodiment of the present application, and the end of the brake pin abuts against the non-parking part;

[0031] Figure 6 Schematic diagram of the locking member cooperating with the second locking tooth in an embodiment of the present application, and the end of the brake pin abuts against the parking part;

[0032] Figure 7 Schematic diagram of the driving member in an embodiment of the present application;

[0033] Figure 8 Schematic cross-sectional structure diagram of the intermittent motion device in an embodiment of the present application;

[0034] Figure 9 Partial cross-sectional structure diagram of the intermittent motion device in an embodiment of the present application;

[0035] Figure 10 Schematic diagram of the locking member installed on the operating member in an embodiment of the present application;

[0036] Figure 11 Schematic diagram of the driving member from another perspective in an embodiment of the present application;

[0037] Figure 12 Partial exploded structure diagram of the children's vehicle in an embodiment of the present application;

[0038] Figure 13 Schematic diagram of the end of another brake pin abutting against another parking part in an embodiment of the present application;

[0039] Figure 14 Schematic diagram of the end of another brake pin abutting against another non-parking part in an embodiment of the present application.

[0040] Reference numerals: 1, children's vehicle; 10, vehicle frame; 20, wheel locking structure; 21, intermittent motion device; 211, mounting seat; 2111, arc-shaped limiting groove; 212, operating member; 2121, bottom wall; 2122, side wall; 2123, limiting protrusion; 213, driving member; 2131, first locking tooth; 2132, second locking tooth; 2133, parking part; 2133a, positioning groove; 2134, non-parking part; 2134a, first abutting slope; 2134b, second abutting slope; 214, locking member; 215, bracket; 2151, arc part; 2152, connecting part; 216, first elastic member; 217, second elastic member; 22, wheel; 221, parking hole; 23, brake pin; 24, brake spring; 25, another mounting seat; 26, another wheel; 261, another parking hole; 27, another brake pin; 28, another driving member; 281, another parking part; 282, another non-parking part; 29, pushing member; 31, sliding member; OO', central axis. Detailed implementation manners

[0041] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] As Figures 1 - 2 shown, Figure 1 This is a schematic diagram of a partial structure of a children's vehicle 1 proposed in an embodiment of the present application; the children's vehicle 1 includes a vehicle frame 10, a front wheel (not shown in the figure), a rear wheel, and a wheel locking structure 20.

[0043] The vehicle frame 10 serves as a bracket 215 of the children's vehicle 1 for carrying structural members such as a seat (not shown in the figure), a storage basket (not shown in the figure), etc.; the specific structure of the vehicle frame 10 is not limited here, and designers can make reasonable designs according to actual needs; the specific material of the vehicle frame 10 is not limited here either, and designers can make reasonable selections according to actual needs.

[0044] The front wheel serves as a front sliding member of the children's vehicle 1, and the front wheel is arranged below the vehicle frame 10; the specific connection manner between the front wheel and the vehicle frame 10 is not limited here, and designers can make reasonable designs according to actual needs; for example, the front wheel can be but not limited to being rotatably connected to the vehicle frame 10 through a wheel axle.

[0045] The rear wheel serves as a rear sliding member of the children's vehicle 1, and the rear wheel is arranged below the vehicle frame 10.

[0046] The wheel locking structure 20 is used as a lock / release component of the baby stroller 1 to switch the baby stroller 1 between a braking state and a brake-released state; the wheel locking structure 20 includes an intermittent motion device 21 , a wheel 22 and a brake pin 23 .

[0047] like Figures 3 - 6 As shown, the intermittent motion device 21 serves as a power transmission structure of the wheel locking structure 20, and is used to drive the brake pin 23 to move axially (parallel and coplanar with the central axis OO' of the mounting seat 211 described below) between the parking position and the non-parking position; the intermittent motion device 21 includes a mounting seat 211, an operating member 212, a driving member 213 and a locking member 214.

[0048] The mounting seat 211 serves as the base of the intermittent motion device 21, and the mounting seat 211 defines the central axis OO'; the specific structure of the mounting seat 211 is not limited here, and designers can make reasonable designs according to actual needs; for example, the mounting seat 211 can be, but is not limited to, an approximately cylindrical shape with both ends open in the direction of the central axis OO'.

[0049] The mounting seat 211 is connected to the bottom of the frame 10; the specific connection method between the mounting seat 211 and the frame 10 is not limited here, and the designer can make a reasonable design according to actual needs; for example, the mounting seat 211 can be but not limited to being detachably connected to the frame 10 by at least one of screw connection, clip connection or plug-in connection; for another example, the mounting seat 211 can be but not limited to being non-detachably connected to the frame 10 by welding, gluing or riveting.

[0050] The operating member 212 serves as a force-bearing member of the intermittent motion device 21 ; the operating member 212 may include, but is not limited to, a brake pedal.

[0051] The operating member 212 is disposed on the mounting seat 211; the operating member 212 can reciprocate between the initial position and the action position around the central axis OO' relative to the mounting seat 211. When the operating member 212 is in the initial position, the operating member 212 is not subjected to external force (such as stepping), so the operating member 212 will not rotate around the central axis OO' relative to the mounting seat 211; the operating member 212 rotates around the central axis OO' relative to the mounting seat 211 to the above-mentioned action position under the action of external force; when the external force acting on the operating member 212 is removed, the operating member 212 can rotate around the central axis OO' relative to the mounting seat 211 to the above-mentioned initial position under the action of the elastic restoring force of the first elastic member 216 (described below), that is, complete one reciprocating motion of the operating member 212.

[0052] The driving member 213, as a transmission component of the intermittent motion device 21, on the one hand, cooperates with the locking member 214 to achieve relative fixation and relative change in the position between the driving member 213 and the mounting seat 211, and on the other hand, is used to cooperate with the brake pin 23 to drive the brake pin 23 to move axially between the parking position and the non-parking position; the driving member 213 may but is not limited to include a driving disc.

[0053] The driving member 213 is arranged inside the mounting seat 211; specifically, the driving member 213 is rotatably connected in the mounting seat 211 and always abuts against the end of the brake pin 23.

[0054] As Figure 7 shown, on the side of the driving member 213 facing the operating member 212, there are a plurality of first locking teeth 2131 and a plurality of second locking teeth 2132 arranged alternately around the central axis OO'; the central angle corresponding to the first contour line of the end face on the side of the first locking tooth 2131 facing away from the central axis OO' is α, and the central angle corresponding to the second contour line of the end face on the side of the second locking tooth 2132 facing away from the central axis OO' is β, and α < β; the tooth tip of the first locking tooth 2131 is closer to the central axis OO' than the tooth tip of the second locking tooth 2132. The first locking teeth 2131 and the second locking teeth 2132 are in the shape of one-way tooth teeth; here, the number of the first locking teeth 2131 and the number of the second locking teeth 2132 are not limited, and designers can make reasonable designs according to actual needs; for example, when the number of the first locking teeth 2131 is three, the number of the second locking teeth 2132 is also three, and the three first locking teeth 2131 and the three second locking teeth 2132 are arranged alternately around the central axis OO'; another example is that when the number of the first locking teeth 2131 is four, the number of the second locking teeth 2132 is also four, and the four first locking teeth 2131 and the four second locking teeth 2132 are arranged alternately around the central axis OO'.

[0055] As Figures 5 - 6 shown, the locking member 214, as a locking part of the intermittent motion device 21, is used to cooperate with the driving member 213 to achieve relative fixation and relative change in the position between the driving member 213 and the mounting seat 211; the locking member 214 may but is not limited to include a locking pin or a locking block.

[0056] The locking member 214 is rotatably connected to the operating member 212; specifically, the locking member 214 is rotatably connected to the operating member 212 through a rotating shaft.

[0057] When the operating member 212 moves from the initial position to the active position, the driving member 213 follows the operating member 212 to rotate around the central axis OO' to push the locking member 214, so that the locking member 214 contacts the end surface of a first locking tooth 2131 facing away from the central axis OO', or contacts the end surface of a second locking tooth 2132 facing away from the central axis OO'.

[0058] It should be noted that when the operating member 212 moves to the acting position and the force acting on the operating member 212 is cancelled, the operating member 212 rotates around the central axis OO' relative to the mounting seat 211 to the above-mentioned initial position under the action of the elastic restoring force of the first elastic member 216. Since the locking member 214 abuts against the second locking tooth 2132 or the first locking tooth 2131, the locking member 214 limits the rotation of the driving member 213, so that the locking member 214 will not rotate with the operating member 212.

[0059] By reasonably designing the central angle α corresponding to the first contour line of the end face of the first locking tooth 2131 on the side facing away from the central axis OO' and the central angle β corresponding to the second contour line of the end face of the second locking tooth 2132 on the side facing away from the central axis OO', α is made less than β, and the tooth top of the first locking tooth 2131 is arranged closer to the central axis OO' than the tooth top of the second locking tooth 2132; when the locking member 214 contacts the end face of the first locking tooth 2131 on the side facing away from the central axis OO', the user only needs to apply a small force to the operating member 212 to rotate the driving member 213 to push the locking member 214, so that the locking member 214 passes over the first locking tooth 2131 and is adjacent to the second locking tooth 2132 facing away from the central axis. OO' side; when the locking member 214 contacts the end face of one of its second locking teeth 2132 on the side facing away from the central axis OO', the user needs to apply a larger force to the operating member 212 to allow the driving member 213 to rotate to push the locking member 214, so that the locking member 214 passes over the second locking tooth 2132 and abuts against the end face of the first locking tooth 2131 adjacent to the second locking tooth 2132 on the side facing away from the central axis OO'; in this way, the user needs to apply different amounts of force to the operating member 212 to switch the child stroller 1 between the brake release state and the brake state; compared with the user applying a single amount of force to the operating member 212 to achieve the switching of the child stroller 1 between the brake release state and the brake state, the convenience of use of the child stroller 1 can be effectively improved.

[0060] It should be noted that if the locking member 214 contacts the end face on the side of the first locking tooth 2131 facing away from the central axis OO', it corresponds to the brake release state of the baby carriage 1 (i.e., the brake pin 23 is in the non-parking position as introduced below). At this time, the user only needs to apply a small force to the operating member 212 to switch the baby carriage 1 from the brake release state to the braking state (i.e., to switch the brake pin 23 from the non-parking position to the parking position), facilitating the user to perform the braking operation. At the same time, when the locking member 214 contacts the end face on the side of the second locking tooth 2132 facing away from the central axis OO', it corresponds to the braking state of the baby carriage 1 (i.e., the brake pin 23 is in the parking position as introduced below). At this time, the user needs to apply a large force to the operating member 212 to switch the baby carriage 1 from the braking state to the brake release state (i.e., to switch the brake pin 23 from the parking position to the non-parking position) to ensure the reliability of the baby carriage 1 when in the braking state. In addition, by designing the tooth tip of the first locking tooth 2131 to be closer to the central axis OO' than the tooth tip of the second locking tooth 2132, and in combination with the design of α < β, the user needs to apply a large force to the operating member 212 to make the rotation angle of the operating member 212 larger to switch the baby carriage 1 from the braking state to the brake release state, with an obvious operation feedback (for example, the user can clearly feel a "click" sound), and at the same time, it can also prevent the baby carriage 1 from accidentally unlocking (i.e., the brake pin 23 accidentally switches from the parking position to the non-parking position) to ensure the safety and reliability of the baby carriage 1 when in the braking state.

[0061] Specifically, 27° ≤ α ≤ 35°, 37° ≤ β ≤ 45°. For example, α = 27°, β = 45°; or α = 32°, β = 40°; or α = 35°, β = 37°; and so on. Such cases will not be elaborated here. By reasonably designing the central angle α corresponding to the first contour line of the end face of the first locking tooth 2131 on the side facing away from the central axis OO' and the central angle β corresponding to the second contour line of the end face of the second locking tooth 2132 on the side facing away from the central axis OO', such that the central angles α and β satisfy the above conditional formula, the angles of the central angles α and β will neither be too large nor too small, facilitating the user to apply different magnitudes of force to the operating member 212 to achieve the switching of the baby carriage 1 between the brake release state and the braking state.

[0062] As Figure 8As shown, the mounting base 211 has a disc-shaped surface opposite to the operating member 212. The disc-shaped surface is provided with an arc-shaped limiting groove 2111, and the center of the arc-shaped limiting groove 2111 lies on the central axis OO'. The intermittent motion device 21 further includes a bracket 215 and a first elastic member 216; at least a part of the bracket 215 is disposed on the side of the mounting base 211 away from the operating member 212, and a part of the operating member 212 passes through the arc-shaped limiting groove and is fixedly connected to the bracket 215; the first elastic member 216 is disposed in the arc-shaped limiting groove 2111 and abuts between an end wall of the arc-shaped limiting groove 2111 and the bracket 215 to bias the operating member 212 towards the initial position. Among them, the operating member 212 can be fixedly connected to the bracket 215 by at least one of, but not limited to, screwing, clamping or plugging. The first elastic member 216 can be, but not limited to, a spring or a spring piece. By designing the bracket 215, the bracket 215 is used to realize the connection between the operating member 212 and the mounting base 211; by designing the first elastic member 216, when the operating member 212 moves from the initial position to the acting position, the first elastic member 216 is compressed and has an elastic restoring force. When the external force acting on the operating member 212 is withdrawn, the operating member 212 can rotate relative to the mounting base 211 about the central axis OO' to the above-mentioned initial position under the action of the elastic restoring force of the first elastic member 216, that is, the automatic reset of the operating member 212 can be realized.

[0063] Specifically, the number of the arc-shaped limiting grooves 2111 is multiple, and the multiple arc-shaped limiting grooves 2111 are arranged at intervals around the central axis OO'. The bracket 215 includes an arc portion 2151 and a plurality of connecting portions 2152 connected to the arc portion 2151; the plurality of connecting portions 2152 are arranged in one-to-one correspondence with the plurality of arc-shaped limiting grooves 2111; a part of the operating member 212 passes through the arc-shaped limiting grooves 2111 and is fixedly connected to the corresponding connecting portion 2152. The number of the first elastic members 216 is multiple, and the multiple first elastic members 216 are arranged in one-to-one correspondence with the multiple arc-shaped limiting grooves 2111, and each first elastic member 216 abuts between an end wall of the corresponding arc-shaped limiting groove 2111 and the connecting portion 2152. Among them, the connecting portion 2152 can be integrally formed with the arc portion 2151 by injection molding or 3D printing, but is not limited thereto; a part of the operating member 212 passes through the arc-shaped limiting grooves 2111 and is fixedly connected to the connecting portion 2152 by screwing. By designing the arc portion 2151, the arc portion 2151 connects the plurality of connecting portions 2152 into a whole, so as to facilitate the installation between the bracket 215 and the operating member 212 and reduce the assembly difficulty between the operating member 212 and the mounting seat 211; by designing the multiple arc-shaped limiting grooves 2111, the multiple first elastic members 216 and the multiple connecting portions 2152 to be arranged in one-to-one correspondence, when the operating member 212 moves from the initial position to the acting position, the multiple first elastic members 216 are simultaneously compressed and have elastic restoring forces, so as to provide a more uniform rotational force for the operating member 212.

[0064] Of course, the number of the first elastic members 216 can also be one, and the one first elastic member 216 is arranged corresponding to any one of the arc-shaped limiting grooves 2111, and the one first elastic member 216 abuts between an end wall of the corresponding arc-shaped limiting groove 2111 and the connecting portion 2152.

[0065] Such as Figures 7 - 8As shown in the figure, the central angle corresponding to the third contour line of the arc surface on the side of the arc-shaped limit groove 2111 close to the central axis OO' is γ, and γ < α + β. In this way, it is easy to realize the switching of the baby carriage 1 between the brake release state and the braking state. For example, when the locking member 214 contacts the end surface on the side of the first locking tooth 2131 facing away from the central axis OO', it corresponds to the brake release state of the baby carriage 1 (that is, the brake pin 23 is in the non-parking position). By designing γ < α + β and restricting the rotation angle of the operating member 212, it is easy for the locking member 214 to cross the first locking tooth 2131 and snap into the adjacent second locking tooth 2132, which is beneficial for the baby carriage 1 to switch from the brake release state to the braking state, that is, it is beneficial for the brake pin 23 to switch from the non-parking position to the parking position. Another example is that when the locking member 214 contacts the end surface on the side of the second locking tooth 2132 facing away from the central axis OO', it corresponds to the braking state of the baby carriage 1 (that is, the brake pin 23 is in the parking position). By designing γ < α + β and restricting the rotation angle of the operating member 212, it is easy for the locking member 214 to cross the second locking tooth 2132 and snap into the adjacent first locking tooth 2131, which is beneficial for the baby carriage 1 to switch from the braking state to the brake release state, that is, it is beneficial for the brake pin 23 to switch from the parking position to the non-parking position.

[0066] As Figures 9 - 10 As shown in the figure, the operating member 212 has a bottom wall 2121 and a side wall 2122 disposed around the bottom wall 2121; the locking member 214 is rotatably connected to the bottom wall 2121. The intermittent motion device 21 further includes a second elastic member 217, and the second elastic member 217 is disposed between the side wall 2122 and the locking member 214 to bias the locking member 214 toward the first locking tooth 2131 or the second locking tooth 2132. Among them, the second elastic member 217 can be but is not limited to a spring or a spring piece. By designing the second elastic member 217, when the user applies a force to the operating member 212, the driving member 213 rotates to push against the locking member 214, and the locking member 214 rotates to squeeze the second elastic member 217 to make the second elastic member 217 have an elastic restoring force. When the locking member 214 crosses the first locking tooth 2131 (the second locking tooth 2132), the locking member 214 rotates under the action of this elastic restoring force to abut against the end surface on the side of the second locking tooth 2132 (the first locking tooth 2131) adjacent to the first locking tooth 2131 (the second locking tooth 2132) facing away from the central axis OO', so as to realize the relative fixation of the position between the driving member 213 and the mounting seat 211. It should be noted that the elastic restoring force of the first elastic member 216 is greater than the elastic restoring force of the second elastic member 217, so that it is convenient for the operating member 212 to rotate to the reset position under the action of the elastic restoring force of the first elastic member 216.

[0067] The operating member 212 further includes a limiting protrusion 2123. The limiting protrusion 2123 is disposed on the bottom wall 2121, and the limiting protrusion 2123 is located on the side of the locking member 214 away from the second elastic member 217. Among them, the limiting protrusion 2123 can be integrally formed with the bottom wall 2121 by injection molding or 3D printing, but is not limited thereto. By designing the limiting protrusion 2123, the limiting protrusion 2123 can limit the locking member 214, so as to reduce or even avoid the possibility that the locking member 214 rotates too large an angle due to the excessive elastic restoring force of the second elastic member 217.

[0068] As Figure 5 , Figure 6 and Figure 11 shown, the wheel 22 serves as a sliding member of the wheel locking structure 20; the wheel 22 can be the front wheel or the rear wheel of the baby carriage 1. In the embodiment of the present application, for the convenience of the user to operate, the wheel 22 is the right rear wheel, the mounting seat 211 has a wheel axle hole, and the wheel axle of the right rear wheel is rotatably inserted into the wheel axle hole of the mounting seat 211.

[0069] The wheel 22 is rotatably connected to the mounting seat 211 around the central axis OO', a parking hole 221 is provided on the side of the wheel 22 facing the mounting seat 211, and the wheel 22 and the operating member 212 are located on opposite sides of the driving member 213.

[0070] The brake pin 23 serves as a locking member of the wheel locking structure 20. On the one hand, it is used to cooperate with the driving member 213 and can move axially between a parking position and a non-parking position under the drive of the driving member 213. On the other hand, it is used to cooperate with the parking hole 221 on the wheel 22 to switch the baby carriage 1 between the above-mentioned braking state and the above-mentioned brake release state.

[0071] The brake pin 23 is disposed in the pin hole of the mounting seat 211. The brake pin 23 is located between the driving member 213 and the wheel 22, and the brake pin 23 can move axially between a parking position and a non-parking position. In the parking position, the brake pin 23 is inserted into the parking hole 221 to prevent the wheel 22 from rotating. At this time, the baby carriage 1 is in the above-mentioned braking state, and the user can release the handle of the baby carriage 1 with both hands as needed; in the non-parking position, the brake pin 23 withdraws from the parking hole 221 to allow the wheel 22 to rotate. At this time, the baby carriage 1 is in the above-mentioned brake release state, and the user can push the baby carriage 1 as needed.

[0072] The driving member 213 has a plurality of parking portions 2133 extending toward the wheel 22 and a plurality of non-parking portions 2134 recessed away from the wheel 22 on the side abutting against the brake pin 23; the plurality of parking portions 2133 and the plurality of non-parking portions 2134 are alternately arranged around the central axis OO'. The driving member 213 rotates to make the parking portions 2133 and the non-parking portions 2134 alternately abut against the end of the brake pin 23; in the parking position, the end of the brake pin 23 abuts against the parking portion 2133, and the brake pin 23 is inserted into the parking hole 221 to prevent the wheel 22 from rotating. At this time, the child stroller 1 is in the above-mentioned braking state, and the user can release the handle of the child stroller 1 with both hands as needed; in the non-parking position, the end of the brake pin 23 abuts against the non-parking portion 2134, and the brake pin 23 withdraws from the parking hole 221 to allow the wheel 22 to rotate. At this time, the child stroller 1 is in the above-mentioned brake release state, and the user can push the child stroller 1 as needed. It should be noted that the wheel locking structure 20 also includes a brake spring 24, one end of the brake spring 24 abuts against the mounting seat 211, and the other end of the brake spring 24 abuts against the brake pin 23; in the parking position, the brake pin 23 is inserted into the parking hole 221 and squeezes the brake spring 24 so that the brake spring 24 has an elastic restoring force, which is suitable for automatic resetting of the brake pin 23 when it switches from the parking position to the non-parking position.

[0073] like Figure 11 As shown, the parking portion 2133 is provided with a positioning groove 2133a; in the parking position, the end of the brake pin 23 extends into the positioning groove 2133a. By designing the positioning groove 2133a, when the brake pin 23 is in the parking position, the groove wall surface of the positioning groove 2133a can limit the brake pin 23, so that the brake pin 23 will not be separated from the parking portion 2133 due to a small rotation of the driving member 213, so as to ensure the connection stability between the brake pin 23 and the parking hole 221 when the brake pin 23 is in the parking position, thereby ensuring the reliability of the child stroller 1 when it is in the braking state.

[0074] The non-parking part 2134 has a first abutting slope 2134a and a second abutting slope 2134b arranged around the central axis OO'; the inclination angle of the first abutting slope 2134a is smaller than that of the second abutting slope 2134b; the end of the brake pin 23 transitions from the non-parking part 2134 to the parking part 2133 via the first abutting slope 2134a, and the end of the brake pin 23 transitions from the parking part 2133 to the non-parking part 2134 via the second abutting slope 2134b. By designing the inclination angle of the first abutting slope 2134a to be smaller than that of the second abutting slope 2134b, when the brake pin 23 transitions from the non-parking part 2134 to the parking part 2133 via the first abutting slope 2134a, the movement path of the brake pin 23 on the first abutting slope 2134a with a smaller inclination angle is longer, and the brake pin 23 can be inserted into the parking hole 221 relatively slowly under the pushing action of the first abutting slope 2134a. When the brake pin 23 transitions from the parking part 2133 to the non-parking part 2134 via the second abutting slope 2134b, the movement path of the brake pin 23 on the second abutting slope 2134b with a larger inclination angle is shorter, and the brake pin 23 can exit the parking hole 221 relatively quickly under the action of the second abutting slope 2134b. In this way, the slow-in and fast-out of the brake pin 23 can be achieved, achieving the effect of saving effort.

[0075] As Figures 12 - 14 shown, the wheel locking structure 20 further includes another mounting seat 25, another wheel 26, another brake pin 27, and another driving member 28. The another mounting seat 25 is connected to the bottom of the frame 10 and is arranged opposite to the above-mentioned mounting seat 211. The another wheel 26 is rotatably connected to the another mounting seat 25 around the central axis OO', and a another parking hole 261 is provided on the side of the another wheel 26 facing the another mounting seat 25. The another brake pin 27 is arranged in the pin hole of the another mounting seat 25, and the another brake pin 27 can move axially between another parking position and another non-parking position; in the another parking position, the another brake pin 27 is inserted into the another parking hole 261 to prevent the another wheel 26 from rotating; in the another non-parking position, the another brake pin 27 exits the another parking hole 261 to allow the another wheel 26 to rotate. The another driving member 28 is rotatably connected in the another mounting seat 25 and abuts against the end of the another brake pin 27. The another driving member 28 has another parking part 281 protruding towards the another wheel 26 and another non-parking part 282 recessed away from the another wheel 26 on the side abutting against the another brake pin 27; in the another parking position, the end of the another brake pin 27 abuts against the another parking part 281; in the another non-parking position, the end of the another brake pin 27 abuts against the another non-parking part 282.

[0076] As Figure 5 、 Figure 6 、 Figures 12 - 14As shown, the wheel locking structure 20 further includes a pushing member 29, a sliding member 31, a cable (not shown in the figure), and a spring (not shown in the figure). The pushing member 29 is disposed in the mounting seat 211. The pushing member 29 is located between the driving member 213 and the wheel 22 and is axially movable. In the parking position, the end of the pushing member 29 abuts against the parking portion 2133. In the non-parking position, the end of the pushing member 29 abuts against the non-parking portion 2134. The sliding member 31 is disposed in the mounting seat 211. The sliding member 31 is slidable relative to the mounting seat 211 in a direction perpendicular to the axial direction, and the sliding member 31 is in inclined surface engagement with the pushing member 29. The cable is buried inside the frame 10. One end of the cable is connected to the sliding member 31, and the other end of the cable is connected to another driving member 28. The spring is disposed in another mounting seat 25. One end of the spring is connected to the another mounting seat 25, and the other end of the spring is connected to another driving member 28. Among them, the pushing member 29 may but is not limited to include a push rod or a push block; the sliding member 31 may but is not limited to include a sliding rod or a sliding block.

[0077] When the baby carriage 1 is in the brake release state, the user applies a force to the operating member 212. The operating member 212 rotates around the central axis OO' from the initial position to the acting position. The driving member 213 rotates together with the operating member 212 to push the pushing member 29. The pushing member 29 moves axially along the first abutting inclined surface 2134a and transitions from the non-parking portion 2134 to the parking portion 2133. At the same time, the pushing member 29 drives the sliding member 31 to slide perpendicular to the axial direction through inclined surface engagement. The sliding of the sliding member 31 drives another driving member 28 to rotate through the cable (the another driving member 28 compresses the spring so that the spring is in a compressed state and has an elastic restoring force). Another driving member 28 rotates to push another brake pin 27 so that another brake pin 27 transitions from another non-parking portion 282 to another parking portion 281, and another brake pin 27 is inserted into another parking hole 261 and is in another parking position. When the baby carriage 1 is in the braking state, the user applies a force to the operating member 212. The operating member 212 rotates around the central axis OO' from the initial position to the acting position. The driving member 213 rotates together with the operating member 212 to push the pushing member 29. The pushing member 29 moves axially along the second abutting inclined surface 2134b and transitions from the parking portion 2133 to the non-parking portion 2134. Another driving member 28 rotates under the action of the elastic restoring force of the above spring to push another brake pin 27 so that another brake pin 27 transitions from another parking portion 281 to another non-parking portion 282, and another brake pin 27 exits another parking hole 261 and is in another non-parking position. At the same time, the sliding member 31 is driven to slide perpendicular to the axial direction through the cable. The sliding of the sliding member 31 drives the pushing member 29 to move axially through inclined surface engagement, so that the end of the pushing member 29 abuts against the non-parking portion 2134.

[0078] It should be noted that in the parking position, the pushing member 29 and the brake pin 23 respectively abut against two different parking parts 2133; in the non-parking position, the pushing member 29 and the brake pin 23 respectively abut against two different non-parking parts 2134. The movements of the brake pin 23 and the pushing member 29 are synchronized, so that the movements of the brake pin 23 and another brake pin 27 are also synchronized. In this way, the synchronization locking and synchronization unlocking of the wheel 22 and another wheel 26 can be achieved, that is, the rapid response synchronization of the children's vehicle 1 in the braking state and the brake release state can be achieved.

[0079] In the attached drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only used for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0080] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An intermittent motion device, characterized in that, Comprising: A mounting base that defines a central axis; An operating member disposed on the mounting base and capable of reciprocating relative to the mounting base about the central axis between an initial position and an operative position; A driving member disposed within the mounting base, on a side of the driving member facing the operating member, there are a plurality of first locking teeth and a plurality of second locking teeth alternately arranged around the central axis; the central angle corresponding to a first contour line of an end face on a side of the first locking tooth facing away from the central axis is α, the central angle corresponding to a second contour line of an end face on a side of the second locking tooth facing away from the central axis is β, and α < β; the tooth tip of the first locking tooth is closer to the central axis than the tooth tip of the second locking tooth; A locking member rotatably connected to the operating member; Wherein, when the operating member moves from the initial position to the operative position, the driving member follows the operating member to rotate about the central axis to push against the locking member, so that the locking member contacts an end face on a side of one of the first locking teeth facing away from the central axis, or the locking member contacts an end face on a side of one of the second locking teeth facing away from the central axis.

2. The intermittent motion device according to claim 1, wherein: 27 degrees ≤ α ≤ 35 degrees, 37 degrees ≤ β ≤ 45 degrees.

3. The intermittent motion device according to claim 1, wherein: The mounting base has a disk-shaped surface opposite to the operating member, and an arc-shaped limiting groove is provided on the disk-shaped surface, and the center of the arc-shaped limiting groove lies on the central axis; The intermittent motion device further includes a bracket and a first elastic member. At least part of the bracket is disposed on a side of the mounting base facing away from the operating member. A part of the operating member passes through the arc-shaped limiting groove and is fixedly connected to the bracket. The first elastic member is disposed in the arc-shaped limiting groove and abuts between an end wall of the arc-shaped limiting groove and the bracket to bias the operating member towards the initial position.

4. The intermittent motion device according to claim 3, wherein: The central angle corresponding to a third contour line of an arc surface on a side of the arc-shaped limiting groove close to the central axis is γ, and γ < α + β.

5. The intermittent motion device according to any one of claims 1-4, wherein: The operating member has a bottom wall and a side wall disposed around the bottom wall; the locking member is rotatably connected to the bottom wall; The intermittent motion device further includes a second elastic member disposed between the side wall and the locking member to bias the locking member towards the first locking tooth or the second locking tooth.

6. The intermittent motion device according to claim 5, wherein: The operating member further includes a limiting protrusion disposed on the bottom wall, and the limiting protrusion is located on a side of the locking member facing away from the second elastic member.

7. A wheel locking structure, characterized in that, Comprising: The intermittent motion device according to any one of claims 1-6; A wheel rotatably connected to the mounting base around the central axis. A parking hole is provided on a side of the wheel facing the mounting base. The wheel and the operating member are located on opposite sides of the driving member; A brake pin is arranged in the mounting seat, located between the driving member and the wheel, and can move axially between a parking position and a non-parking position; In the parking position, the brake pin is inserted into the parking hole to prevent the wheel from rotating. In the non-parking position, the brake pin withdraws from the parking hole to allow the wheel to rotate; Wherein, the driving member is rotatably connected in the mounting seat and abuts against the end of the brake pin. The driving member has a plurality of parking portions extending towards the wheel and a plurality of non-parking portions recessed away from the wheel on the side abutting against the brake pin. The plurality of parking portions and the plurality of non-parking portions are alternately arranged around the central axis; in the parking position, the end of the brake pin abuts against the parking portion, and in the non-parking position, the end of the brake pin abuts against the non-parking portion.

8. The wheel locking structure according to claim 7, wherein, The parking portion is provided with a positioning groove; in the parking position, the end of the brake pin extends into the positioning groove.

9. The wheel locking structure according to claim 7, wherein, The non-parking portion has a first abutting inclined surface and a second abutting inclined surface arranged around the central axis. The inclination angle of the first abutting inclined surface is smaller than the inclination angle of the second abutting inclined surface; the end of the brake pin transitions from the non-parking portion to the parking portion via the first abutting inclined surface, and the end of the brake pin transitions from the parking portion to the non-parking portion via the second abutting inclined surface.

10. A children's vehicle, characterized in that, Comprising: A vehicle frame; A front wheel and a rear wheel, arranged below the vehicle frame; The wheel locking structure according to any one of claims 7-9, wherein the wheel is the front wheel or the rear wheel.

Images