Stroller

Abstract

The utility model discloses a baby stroller. The baby stroller comprises a stroller frame and an unlocking mechanism. The frame comprises a front foot, a rear foot, a seat tube, a handlebar tube and a frame body; the unlocking mechanism comprises a linkage rod, a locking piece and a driving piece; the handlebar tube and the frame body are connected with the seat tube through a pivot shaft, and the first end of the linkage rod is provided with a first locking opening and a second locking opening which are arranged around the axis of the pivot shaft at intervals. The frame has an unfolded state and a folded state; in the unfolded state, the grounding ends of the front legs and the grounding ends of the rear legs are far away from each other, and the locking pieces are inserted into the first locking openings; in the folding state, the grounding end of the front foot and the grounding end of the rear foot are close to each other, and the locking piece is inserted into the second locking opening; and the driving piece is configured to drive the locking piece to move relative to the frame body to be separated from the first locking opening or the second locking opening through movement of the handlebar tube, so that the frame is switched between an unfolding state and a folding state. By means of the design, the stroller frame can be in a locked folded state, and a user can conveniently carry the folded stroller.

Description

Technical Field

[0001] The present application relates to the technical field of children's appliances, and in particular to a children's stroller. Background Art

[0002] In terms of structural design, in order to meet the practicality and ease of use required by consumers, the stroller includes a frame, which has an expanded state and a folded state. When the user needs to use the stroller, the frame is in the expanded state, and the user can let the child sit in the basket of the stroller to free up both hands. When the user does not need to use the stroller, the frame is in the folded state, and the user can place the folded stroller in a designated location, and the folded stroller has a small space occupancy rate.

[0003] However, due to the structural design of the stroller in the related art, when the frame is in the folded state, the frame support rods can still rotate around their corresponding pivot points, and the frame cannot be always locked in the folded state. This makes it inconvenient for users to carry the folded stroller. Utility Model Content

[0004] The embodiment of the present application provides a child stroller that can solve the problem in the related art that the frame of the child stroller cannot always be locked in the folded state due to its own structural design, making it inconvenient for the user to carry the folded child stroller.

[0005] The embodiment of the present application provides a child stroller; the child stroller includes a frame and a release mechanism, the frame including a front leg, a rear leg, a seat tube, a handle tube and a frame body, the front leg is pivotally connected to the rear leg, the seat tube is pivotally connected to the front leg, the handle tube is fixedly connected to the frame body, and the handle tube and the frame body are connected to the seat tube via a pivot shaft, the release mechanism includes a linkage rod, a locking member and a driving member, a first end of the linkage rod is pivotally connected to the handle tube and the frame body, and the first end of the linkage rod has a first locking opening and a second locking opening spaced apart around the axis of the pivot shaft, the second end of the linkage rod is pivotally connected to the rear leg, and the locking member is movably connected to the frame body, The driving member is movably connected to the handlebars; the bicycle frame has an expanded state and a folded state. In the expanded state, the grounding end of the front foot and the grounding end of the rear foot are away from each other, and the locking member is inserted into the first locking port, so that the positions of the front foot and the rear foot are relatively fixed. In the folded state, the grounding end of the front foot and the grounding end of the rear foot are close to each other, and the locking member is inserted into the second locking port, so that the positions of the front foot and the rear foot are relatively fixed. The driving member is configured to drive the locking member to move relative to the frame body to disengage from the first locking port or the second locking port through the movement of the handlebars, thereby switching the bicycle frame between the expanded state and the folded state.

[0006] When the locking member is inserted into the first locking notch, the locking member can restrict the first end of the linkage rod from rotating relative to the handlebar and the frame, and can restrict the second end of the linkage rod from rotating relative to the rear leg, so that the linkage rod remains stationary. In this way, the front leg, the rear leg, the seat tube, the handlebar and the frame will not rotate around their respective corresponding pivot joints, thereby locking the frame in the deployed state; the front leg, the rear leg, the seat tube, the handlebar, the frame and the linkage member form a multi-link mechanism. When the locking member is inserted into the second locking notch, the locking member can restrict the first end of the linkage rod from rotating relative to the handlebar and the frame, and can restrict the second end of the linkage rod from rotating relative to the rear leg, thereby locking the linkage rod in the folded state, making it convenient for the user to carry the folded child stroller.

[0007] In some embodiments, the first end of the linkage rod includes a pushing portion located between the first locking opening and the second locking opening; when the frame switches between the expanded state and the folded state, the pushing portion contacts the end of the locking member to push the locking member.

[0008] Based on the above embodiment, by designing the push portion, during the process of the frame switching from the expanded state to the folded state, the push portion contacts the end portion of the locking member for transitional pushing of the locking member, thereby facilitating the insertion of the locking member into the second locking port, thereby achieving easy locking of the folded frame; by designing the push portion, during the process of the frame switching from the folded state to the expanded state, the push portion contacts the end portion of the locking member for transitional pushing of the locking member, thereby facilitating the insertion of the locking member into the first locking port, thereby achieving easy locking of the expanded frame.

[0009] In some embodiments, the abutting portion includes a first arcuate abutting surface that is closer to the first locking opening than to the second locking opening, and a second arcuate abutting surface that is closer to the second locking opening than to the first locking opening, the first arcuate abutting surface and the second arcuate abutting surface being distributed around the axis of the pivot shaft. The first arcuate abutting surface includes a first arc passing through a plane perpendicular to the axis of the pivot shaft, the second arcuate abutting surface includes a second arc passing through the same plane, the axis of the pivot shaft includes an intersection point in the same plane, the center distance between the first arc and the intersection point is L1, the center distance between the second arc and the intersection point is L2, and L1 < L2.

[0010] Based on the above embodiment, in a plane perpendicular to the axis of the pivot shaft, by designing the center distance L1 between the intersection points of the first arc line and the axis of the pivot shaft in the plane to be smaller than the center distance L2 between the intersection points of the second arc line and the axis of the pivot shaft in the plane, the driving member needs to move relative to the handlebar under the action of a larger force to drive the locking member to move relative to the frame until it disengages from the first locking groove in order to switch the child stroller from the deployed state to the folded state. This effectively reduces or even prevents the possibility of the locking member accidentally disengaging from the first locking groove when the child stroller is in the deployed state, thereby ensuring the safety and reliability of the child stroller in the deployed state. In a plane perpendicular to the axis of the pivot shaft, by designing the center distance L1 between the intersection points formed by the first arc line and the axis of the pivot shaft in the plane to be smaller than the center distance L2 between the intersection points formed by the second arc line and the axis of the pivot shaft in the plane, the driving member only needs to move relative to the handlebar tube under the action of a small force to drive the locking member to move relative to the frame until it disengages the second locking hole, thereby allowing the child stroller to switch from the folded state to the unfolded state, while also providing obvious operational feedback.

[0011] In some embodiments, the first locking opening and the second locking opening are symmetrically arranged about the axis of the pivot shaft.

[0012] Based on the above embodiment, by designing the first locking opening and the second locking opening to be symmetrically arranged about the axis of the pivot shaft, the first end of the linkage rod can be rotated at a sufficiently large angle relative to the handlebar tube and the frame, so as to ensure that the front leg, rear leg, seat tube, handlebar tube and frame are as close as possible when the frame is in the folded state, thereby reducing the space occupied by the entire child stroller when the frame is in the folded state.

[0013] In some embodiments, the release mechanism further includes a release assembly and a steel wire; the release assembly is movably connected to the handlebar; the steel wire is embedded in a cavity of the handlebar, one end of the steel wire is connected to the release assembly, and the other end of the steel wire is connected to the driver. The release assembly is configured to pull the steel wire by moving relative to the handlebar, and the steel wire drives the driver to move relative to the handlebar, so that the driver drives the locking member to move relative to the frame to disengage the first locking notch or the second locking notch.

[0014] Based on the above embodiment, by designing the release assembly and the steel wire, when the frame is in the unfolded state, the release assembly moves relative to the handlebar tube under the action of force to pull the steel wire, and the movement of the steel wire drives the driving member connected thereto to move relative to the handlebar tube, and the movement of the driving member drives the locking member abutting therewith to move relative to the frame until it disengages from the first lock hole. At this time, since the locking member is not inserted into the first lock hole, the locking member does not limit the first end of the linkage rod. The first end of the linkage rod can rotate relative to the handlebar tube and the frame, and the second end of the linkage rod can rotate relative to the rear foot. In this way, the front foot, rear foot, seat tube, handlebar tube and frame will rotate around their respective corresponding pivot points, so that the grounding end of the front foot and the grounding end of the rear foot gradually approach each other, and then the locking member is inserted into the second lock hole to switch the frame from the unfolded state to the folded state. By designing the release assembly and the steel wire, when the bicycle frame is in the folded state, the release assembly moves relative to the handlebar tube under the action of force to pull the steel wire, and the movement of the steel wire drives the driving member connected thereto to move relative to the handlebar tube, and the movement of the driving member drives the locking member abutting therewith to move relative to the frame until it disengages from the second lock hole. At this time, since the locking member is not inserted into the second lock hole, the locking member does not limit the first end of the linkage rod. The first end of the linkage rod can rotate relative to the handlebar tube and the frame, and the second end of the linkage rod can rotate relative to the rear foot. In this way, the front foot, rear foot, seat tube, handlebar tube and frame will rotate around their respective corresponding pivot points, so that the grounding end of the front foot and the grounding end of the rear foot gradually move away from each other, and then the locking member is inserted into the first lock hole to switch the frame from the folded state to the unfolded state.

[0015] In some embodiments, the release assembly includes a rotating member and a release member; the rotating member is at least partially located in a cavity of the handlebar tube and is rotatably connected to the handlebar tube, and one end of the steel wire is connected to the rotating member; the release member at least partially extends out of the cavity of the handlebar tube, and the release member is configured to drive the rotating member to rotate relative to the handlebar tube by moving relative to the handlebar tube to pull the steel wire.

[0016] Based on the above embodiment, by designing the release member and the rotating member, the release member moves relative to the handlebar tube under the action of force to drive the rotating member to rotate relative to the handlebar tube, thereby pulling the steel wire. The movement of the steel wire drives the driving member connected to it to move relative to the handlebar tube. The movement of the driving member drives the locking member abutting it to move relative to the frame until it disengages from the first locking port or the second locking port.

[0017] In some embodiments, the driving member is slidably connected to the handlebar tube along a preset direction, and the locking member is slidably connected to the frame along a preset direction; the release mechanism also includes a connecting member and a first elastic member; the connecting member is at least partially located in the cavity of the handlebar tube, the connecting member is fixedly connected to the driving member, and the other end of the steel wire is connected to the connecting member; the first elastic member is at least partially located in the cavity of the handlebar tube, the first elastic member abuts between the connecting member and the tube wall of the handlebar tube, and the first elastic member is suitable for generating elastic deformation along the preset direction.

[0018] Based on the above embodiment, the connector is designed to serve as an intermediate connection structure between the steel wire and the driver. By wrapping the end of the steel wire around the connector, the relative position between the steel wire and the driver is fixed. The connector also provides support for the first elastic member to facilitate installation of the first elastic member. By designing the first elastic member, the movement of the steel wire drives the connector connected thereto to move in a preset direction. The movement of the connector compresses the first elastic member, causing the first elastic member to elastically deform in the preset direction. When the force acting on the release member is released, the connector automatically resets due to the elastic restoring force corresponding to the elastic deformation of the first elastic member, thereby causing the driver to automatically reset.

[0019] In some embodiments, the handlebars include a lower hand tube, an upper hand tube, and a locking / unlocking mechanism; the lower hand tube is connected to the seat tube via a pivot axis; the upper hand tube is pivotally connected to an end of the lower hand tube remote from the pivot axis; and the locking / unlocking mechanism is disposed at the pivotal connection between the lower and upper hand tubes. The locking / unlocking mechanism has a locked state and an unlocked state; in the locked state, the locking / unlocking mechanism is configured to lock the upper hand tube to the lower hand tube, thereby fixing the position of the upper hand tube relative to the lower hand tube; in the unlocked state, the locking / unlocking mechanism is configured to unlock the upper hand tube from the lower hand tube, thereby allowing the position of the upper hand tube relative to the lower hand tube to be adjustable; and the locking / unlocking mechanism is switchable between the locked and unlocked states.

[0020] Based on the above embodiment, the locking and unlocking mechanism is designed so that the user can adjust the rotation angle of the upper handlebar relative to the lower handlebar as needed, thereby facilitating grip. When the frame is in the unfolded state, the user can use the locking and unlocking mechanism to adjust the rotation angle of the upper handlebar relative to the lower handlebar as needed, thereby adjusting the upper handlebar to a suitable angle for easier grip. When the frame is in the unfolded state, the user can use the locking and unlocking mechanism to adjust the rotation angle of the upper handlebar relative to the lower handlebar, thereby bringing the upper handlebar closer to the lower handlebar, thereby reducing the overall space occupied by the stroller.

[0021] In some embodiments, the lower hand tube includes a lower push handle and a first pivot seat; the lower push handle is connected to the seat tube via a pivot axis; the first pivot seat is fixedly connected to the end of the lower push handle away from the pivot axis. The upper hand tube includes a second pivot seat and an upper push handle; the second pivot seat is pivotally connected to the first pivot seat, and the second pivot seat has a locking groove; the end of the upper push handle is fixedly connected to the second pivot seat. The locking and unlocking mechanism includes a locking member, a second elastic member and a releasing member; the locking member is slidably connected to the first pivot seat; the second elastic member abuts between the locking member and the first pivot seat, and the second elastic member is suitable for generating elastic deformation along the movement direction of the locking member; the releasing member is slidably connected to the second pivot seat. When the locking and unlocking mechanism is in a locked state, the locking member engages with the locking groove, and when the locking and unlocking mechanism is in an unlocked state, the locking member disengages from the locking groove.

[0022] Based on the above embodiment, when the lock / release mechanism is in the locked state, the locking member engages with the locking groove. At this point, the locking member acts as a limiter for the second pivot seat, preventing the second pivot seat from rotating relative to the first pivot seat, thereby achieving relative fixation between the upper and lower push handles. Under the action of a force, the release member slides relative to the second pivot seat to push against the locking member, disengaging the locking member from the locking groove. At this point, the locking member no longer acts as a limiter for the second pivot seat, allowing the second pivot seat to rotate relative to the first pivot seat, thereby achieving adjustable angle between the upper and lower push handles.

[0023] In some embodiments, the locking groove has a plurality of teeth, which are distributed around the rotation axis of the second pivot seat; the locking member includes a lock tooth, which is slidably connected to the first pivot seat along the direction of the rotation axis of the second pivot seat; the release member includes a release button, which is slidably connected to the second pivot seat along the direction of the rotation axis of the second pivot seat; the second elastic member includes a spring, which abuts between the lock tooth and the inner wall of the first pivot seat, and is suitable for generating elastic deformation along the direction of the rotation axis of the second pivot seat. When the lock-release mechanism is in the locked state, the plurality of teeth of the lock tooth are engaged with the plurality of teeth of the locking groove in a one-to-one correspondence; when the lock-release mechanism is in the released state, the plurality of teeth of the lock tooth are disengaged from all the teeth of the locking groove.

[0024] Based on the above embodiment, when the lock-release mechanism is in the locked state, the multiple teeth of the lock tooth are engaged with the multiple tooth grooves of the locking groove in a one-to-one correspondence. At this time, the lock tooth acts as a circumferential limiter for the second pivot seat, and the second pivot seat cannot rotate relative to the first pivot seat, thereby achieving a relative fixation between the upper push handle and the lower push handle, and further improving the stability of the upper push handle and the lower push handle when the position is relatively fixed. The user applies a pressing force to the release button, and the release button, under the action of the pressing force, slides relative to the second pivot seat along the direction of the rotation axis of the second pivot seat to push the lock tooth so that all the teeth of the lock tooth disengage from the multiple tooth grooves of the locking groove. At this time, the lock tooth no longer acts as a limiter for the second pivot seat, and the second pivot seat can rotate relative to the first pivot seat, thereby achieving an adjustable angle between the upper push handle and the lower push handle. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 1 This is a schematic structural diagram of a child stroller in an embodiment of the present application when the frame is in an unfolded state;

[0027] Figure 2for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 3 This is a schematic structural diagram of a child stroller in one embodiment of the present application when the frame is in a state between the expanded state and the folded state;

[0029] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at B in the middle;

[0030] Figure 5 This is a structural schematic diagram of a child stroller in an embodiment of the present application when the frame is in a folded state;

[0031] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0032] Figure 7 This is a schematic structural diagram of a linkage rod in one embodiment of the present application;

[0033] Figure 8 This is a schematic diagram of a partial cross-sectional structure of a child stroller in one embodiment of the present application;

[0034] Figure 9 for Figure 8 Schematic diagram of the enlarged structure at D in the middle;

[0035] Figure 10 This is a schematic cross-sectional view of a handlebar tube in one embodiment of the present application;

[0036] Figure 11 for Figure 10 Schematic diagram of the enlarged structure at E in the middle;

[0037] Figure 12 This is a schematic structural diagram of an embodiment of the present application wherein the upper and lower handlebars of the handlebars are spaced apart from each other;

[0038] Figure 13 This is a schematic structural diagram of an upper handlebar and a lower handlebar of a handlebar in an embodiment of the present application when the upper handlebar and the lower handlebar are close to each other;

[0039] Figure 14 This is a schematic diagram of a partially exploded structure of a handlebar tube in one embodiment of the present application;

[0040] Figure 15 for Figure 14 Schematic diagram of the enlarged structure at F in the middle;

[0041] Figure 16 for Figure 10 Schematic diagram of the enlarged structure at G in the middle.

[0042] Figure 1: 1. stroller; 10. frame; 11. front leg; 12. rear leg; 13. seat tube; 14. handle tube; 141. lower handle tube; 1411. lower push handle; 1412. first pivot seat; 142. upper handle tube; 1421. upper push handle; 1422. second pivot seat; 1422a. locking groove; 143. locking and unlocking mechanism; 1431. locking member; 1432. second elastic member; 1433. unlocking mechanism 15. Frame; 20. Release mechanism; 21. Linkage rod; 211. First locking opening; 212. Second locking opening; 213. Push portion; 2131. First arcuate push surface; 2132. Second arcuate push surface; 2133. Hollow area; 22. Locking member; 23. Driving member; 24. Rotating member; 25. Release member; 26. Connecting member; 27. First elastic member; 28. Third elastic member; OO', preset direction. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is 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 this application and are not intended to limit this application.

[0044] Please refer to Figures 1-6 As shown, the present application proposes a child stroller 1 , which can place the frame 10 in a locked folded state, making it easy for the user to carry the folded child stroller 1 .

[0045] The stroller 1 includes a frame 10 and a release mechanism 20. The frame 10 includes a front leg 11, a rear leg 12, a seat tube 13, a handlebar 14, and a frame body 15. The front leg 11 is pivotally connected to the rear leg 12; the seat tube 13 is pivotally connected to the front leg 11; the handlebar 14 is fixedly connected to the frame body 15, and the handlebar 14 and the frame body 15 are connected to the seat tube 13 via a pivot axis. The release mechanism 20 includes a linkage rod 21, a locking member 22, and a driving member 23. The first end of the linkage rod 21 is pivotally connected to the handlebar 14 and the frame body 15, and the first end of the linkage rod 21 has a first locking opening 211 and a second locking opening 212 spaced apart about the axis of the pivot axis. The second end of the linkage rod 21 is pivotally connected to the rear leg 12; the locking member 22 is movably connected to the frame body 15; and the driving member 23 is movably connected to the handlebar 14. The frame 10 has an expanded state and a folded state; in the expanded state, the grounding end of the front foot 11 and the grounding end of the rear foot 12 are away from each other, and the locking member 22 is inserted into the first locking port 211, so that the position between the front foot 11 and the rear foot 12 is relatively fixed; in the folded state, the grounding end of the front foot 11 and the grounding end of the rear foot 12 are close to each other, and the locking member 22 is inserted into the second locking port 212, so that the position between the front foot 11 and the rear foot 12 is relatively fixed; the driving member 23 is configured to move through the handlebar 14 to drive the locking member 22 to move relative to the frame 15 until it is disengaged from the first locking port 211 or the second locking port 212, thereby switching the frame 10 between the expanded state and the folded state.

[0046] The following combination Figures 1-16 The specific structure of the child stroller 1 is introduced in detail.

[0047] like Figures 1-6 As shown, the child stroller 1 includes a frame 10 and a release mechanism 20 .

[0048] The frame 10 serves as the main support of the stroller 1. The specific material of the frame 10 is not limited here, and designers can reasonably design it according to actual needs; for example, the material of the frame 10 can be, but is not limited to, plastic, carbon fiber, or titanium alloy.

[0049] The frame 10 includes a front leg 11, a rear leg 12, a seat tube 13, a handlebar tube 14 and a frame body 15; the front leg 11 is pivotally connected to the rear leg 12; the seat tube 13 is pivotally connected to the front leg 11; the handlebar tube 14 is fixedly connected to the frame body 15, and the handlebar tube 14 and the frame body 15 are connected to the seat tube 13 via a pivot axis.

[0050] On the one hand, the release mechanism 20 serves as a locking structure of the stroller 1, and is used to achieve relative fixation of the position between the front legs 11 and the rear legs 12 when the frame 10 is in the expanded state (described below) or the folded state (described below); on the other hand, the release mechanism 20 serves as a disengaging structure of the stroller 1, and is used to achieve relative change of the position between the front legs 11 and the rear legs 12 when the frame 10 is in the expanded state or the folded state, so as to switch the frame 10 between the expanded state and the switching state.

[0051] The release mechanism 20 includes a linkage rod 21 , a locking member 22 and a driving member 23 .

[0052] The linkage rod 21 serves as a linkage member of the release mechanism 20 . A first end of the linkage rod 21 is pivotally connected to the handlebar 14 and the frame 15 , and a second end of the linkage rod 21 is pivotally connected to the rear leg 12 .

[0053] The first end of the linkage rod 21 has a first locking notch 211 and a second locking notch 212 spaced apart around the axis of the pivot shaft.

[0054] The locking member 22, as a connector for the release mechanism 20, is configured to engage with the first locking opening 211 to secure the front and rear legs 11, 12 relative to each other when the frame 10 is in the extended state. It is also configured to engage with the second locking opening 212 to secure the front and rear legs 11, 12 relative to each other when the frame 10 is in the collapsed state. The specific form of the locking member 22 is not limited herein; designers may design it based on practical needs. For example, the locking member 22 may include, but is not limited to, a locking rod or a locking block.

[0055] The locking member 22 is movably connected to the frame 15. The specific method of movably connecting the locking member 22 and the frame 15 is not limited herein, and designers may reasonably select a method based on actual needs. For example, the locking member 22 may be slidably connected to the frame 15, in which case the locking member 22 slides relative to the frame 15 to insert into or disengage from the first locking opening 211 (second locking opening 212). For another example, the locking member 22 may be rotationally connected to the frame 15, in which case the locking member 22 rotates relative to the frame 15 to insert into or disengage from the first locking opening 211 (second locking opening 212).

[0056] The driving member 23 serves as the push member of the release mechanism 20, and is configured to abut against the locking member 22 to drive the locking member 22 to move relative to the frame 15. The specific structure of the driving member 23 is not limited herein, and designers may design it appropriately based on actual needs. For example, the driving member 23 may include, but is not limited to, a driving sleeve sleeved around the handlebar tube 14. Alternatively, the driving member 23 may include, but is not limited to, a driving rod connected to the handlebar tube 14.

[0057] The driving member 23 is movably connected to the handlebar tube 14. The specific manner of movably connecting the driving member 23 and the handlebar tube 14 is not limited herein, and designers may reasonably design the connection based on actual needs. For example, when the driving member 23 includes a driving sleeve, the driving sleeve is sleeved around the handlebar tube 14 and slidably connected thereto. In this case, the driving sleeve slides relative to the handlebar tube 14 to drive the locking member 22 to move relative to the frame 15. For another example, when the driving member 23 includes a driving rod, the driving rod is rotationally connected to the handlebar tube 14. In this case, the driving rod rotates relative to the handlebar tube 14 to drive the locking member 22 to move relative to the frame 15.

[0058] like Figures 1-6 As shown, the frame 10 has an expanded state and a folded state.

[0059] When the bicycle frame 10 is in the deployed state, the grounding end of the front foot 11 and the grounding end of the rear foot 12 are spaced apart from each other, and the locking member 22 is inserted into the first locking slot 211, thereby fixing the front foot 11 and the rear foot 12 in relative position. It should be noted that the front foot 11, the rear foot 12, the seat tube 13, the handlebar tube 14, the frame 15, and the linkage rod 21 form a multi-link mechanism. At this time, since the locking member 22 is inserted into the first locking slot 211, the locking member 22 can restrict the first end of the linkage rod 21 from rotating relative to the handlebar tube 14 and the frame 15, and can restrict the second end of the linkage rod 21 from rotating relative to the rear foot 12, thereby keeping the linkage rod 21 stationary. As a result, the front foot 11, the rear foot 12, the seat tube 13, the handlebar tube 14, and the frame 15 cannot rotate about their respective pivot points, thereby locking the bicycle frame 10 in the deployed state.

[0060] When the bicycle frame 10 is in the folded state, the grounding end of the front foot 11 and the grounding end of the rear foot 12 are close to each other, and the locking member 22 is inserted into the second locking slot 212, thereby fixing the front foot 11 and the rear foot 12 in relative position. It should be noted that the front foot 11, the rear foot 12, the seat tube 13, the handlebar tube 14, the frame 15, and the linkage rod 21 form a multi-link mechanism. At this time, since the locking member 22 is inserted into the second locking slot 212, the locking member 22 can restrict the first end of the linkage rod 21 from rotating relative to the handlebar tube 14 and the frame 15, and can also restrict the second end of the linkage rod 21 from rotating relative to the rear foot 12, thereby keeping the linkage rod 21 stationary. In this way, the front foot 11, the rear foot 12, the seat tube 13, the handlebar tube 14, and the frame 15 cannot rotate about their corresponding pivot points, thereby locking the bicycle frame 10 in the folded state.

[0061] The driving member 23 is configured to move relative to the handlebar 14 to drive the locking member 22 to move relative to the frame 15 to disengage from the first locking opening 211 or the second locking opening 212 , thereby switching the frame 10 between the unfolded state and the folded state. It should be noted that when the bicycle frame 10 is in the deployed state, the driving member 23 moves relative to the handlebar tube 14 to drive the locking member 22 to move relative to the frame body 15 until it is disengaged from the first locking hole 211. At this time, since the locking member 22 is not inserted into the first locking hole 211, the locking member 22 does not limit the first end of the linkage rod 21. The first end of the linkage rod 21 can rotate relative to the handlebar tube 14 and the frame body 15, and the second end of the linkage rod 21 can rotate relative to the rear foot 12. In this way, the front foot 11, the rear foot 12, the seat tube 13, the handlebar tube 14 and the frame body 15 will rotate around their respective corresponding pivot points, so that the grounding end of the front foot 11 and the grounding end of the rear foot 12 gradually approach each other. Subsequently, the locking member 22 is inserted into the second locking hole 212, and the bicycle frame 10 can be switched from the deployed state to the retracted state. When the bicycle frame 10 is in the folded state, the driving member 23 moves relative to the handlebar tube 14 to drive the locking member 22 to move relative to the frame body 15 until it is disengaged from the second locking hole 212. At this time, since the locking member 22 is not inserted into the second locking hole 212, the locking member 22 does not limit the first end of the linkage rod 21. The first end of the linkage rod 21 can rotate relative to the handlebar tube 14 and the frame body 15, and the second end of the linkage rod 21 can rotate relative to the rear foot 12. In this way, the front foot 11, the rear foot 12, the seat tube 13, the handlebar tube 14 and the frame body 15 will rotate around their respective corresponding pivot points, so that the grounding end of the front foot 11 and the grounding end of the rear foot 12 gradually move away from each other. Then the locking member 22 is inserted into the first locking hole 211, and the bicycle frame 10 can be switched from the folded state to the unfolded state.

[0062] In the child stroller 1 of the embodiment of the present application, the front legs 11, rear legs 12, seat tube 13, handlebar tube 14, frame 15, and linkage rod 21 form a multi-link mechanism. When the locking member 22 is inserted into the first locking opening 211, the locking member 22 can restrict the first end of the linkage rod 21 from rotating relative to the handlebar tube 14 and frame 15, and can restrict the second end of the linkage rod 21 from rotating relative to the rear legs 12, so that the linkage rod 21 remains stationary. In this way, the front legs 11, rear legs 12, seat tube 13, handlebar tube 14, and frame 15 will not rotate about their respective pivot points, thereby placing the frame 10 in a locked, deployed state. The front leg 11, the rear leg 12, the seat tube 13, the handlebar tube 14, the frame 15 and the linkage rod 21 form a multi-link mechanism. When the locking member 22 is inserted into the second locking port 212, the locking member 22 can limit the first end of the linkage rod 21 from rotating relative to the handlebar tube 14 and the frame 15, and can limit the second end of the linkage rod 21 from rotating relative to the rear leg 12, so that the linkage rod 21 remains stationary. In this way, the front leg 11, the rear leg 12, the seat tube 13, the handlebar tube 14 and the frame 15 will not rotate around their respective pivot points, thereby placing the frame 10 in a locked folded state, making it easier for the user to carry the folded stroller 1.

[0063] like Figure 2 、 Figure 4 、 Figure 6 and Figure 7 As shown, the first end of the linkage rod 21 includes a push portion 213 located between the first lock opening 211 and the second lock opening 212; when the vehicle frame 10 switches between the deployed state and the folded state, the push portion 213 contacts the end of the locking member 22 to push the locking member 22. By designing the push portion 213, when the vehicle frame 10 switches from the deployed state to the folded state, the push portion 213 contacts the end of the locking member 22 to push the locking member 22 for transition, thereby facilitating the insertion of the locking member 22 into the second lock opening 212, thus achieving easy locking of the folded frame 10; by designing the push portion 213, when the vehicle frame 10 switches from the folded state to the deployed state, the push portion 213 contacts the end of the locking member 22 to push the locking member 22 for transition, thereby facilitating the insertion of the locking member 22 into the first lock opening 211, thus achieving easy locking of the deployed frame 10.

[0064] like Figure 7As shown, the abutting portion 213 has a first arcuate abutting surface 2131 that is closer to the first lock opening 211 than the second lock opening 212, and a second arcuate abutting surface 2132 that is closer to the second lock opening 212 than the first lock opening 211. The first arcuate abutting surface 2131 and the second arcuate abutting surface 2132 are distributed around the axis of the pivot shaft. The first arcuate abutting surface 2131 has a first arc line passing through a plane perpendicular to the axis of the pivot shaft, and the second arcuate abutting surface has a second arc line passing through the same plane. The axis of the pivot shaft has an intersection point passing through the same plane. The center distance between the first arc line and the intersection point is L1 (not shown in the figure), and the center distance between the second arc line and the intersection point is L2; ​​and L1 is less than L2. In a plane perpendicular to the axis of the pivot shaft, by designing the center distance L1 between the intersection points formed by the first arc line and the axis of the pivot shaft in the plane to be smaller than the center distance L2 between the intersection points formed by the second arc line and the axis of the pivot shaft in the plane, the driving member 23 needs to move relative to the handle tube 14 under the action of a larger force to drive the locking member 22 to move relative to the frame 15 until it disengages from the first locking opening 211, so that the child stroller 1 can switch from the deployed state to the folded state. This effectively reduces or even prevents the possibility of the locking member 22 accidentally disengaging from the first locking opening 211 when the child stroller 1 is in the deployed state, thereby ensuring the safety and reliability of the child stroller 1 in the deployed state. In a plane perpendicular to the axis of the pivot shaft, by designing the center distance L1 between the intersection points of the first arc line and the axis of the pivot shaft in the plane to be smaller than the center distance L2 between the intersection points of the second arc line and the axis of the pivot shaft in the plane, the driving member 23 only needs to move relative to the handlebar 14 under the action of a small force to drive the locking member 22 to move relative to the frame 15 until it disengages from the second locking opening 212, thereby allowing the child stroller 1 to switch from the folded state to the unfolded state, while also providing clear operational feedback (for example, the user can clearly feel a "click" sound, and the user can determine by the "click" that the locking member 22 has been inserted into the first locking opening 211).

[0065] like Figure 7 As shown, the first locking opening 211 and the second locking opening 212 are symmetrically arranged about the axis of the pivot shaft. This allows the first end of the linkage rod 21 to rotate a sufficiently large angle relative to the handlebar tube 14 and the frame 15 to ensure that the front legs 11, rear legs 12, seat tube 13, handlebar tube 14, and frame 15 are as close as possible when the frame 10 is folded, thereby reducing the space occupied by the entire child stroller 1 when the frame 10 is folded.

[0066] like Figure 7As shown, a hollow area 2133 is provided on the side of the push portion 213 facing the frame 15. The hollow area 2133 may be, but is not limited to, a hollow groove or a hollow hole formed on the side of the push portion 213 facing the frame 15. In this design, by designing the hollow area 2133 on the push portion 213, when the frame 10 switches from the expanded state to the folded state, the push portion 213 contacts the end of the locking member 22. The design of the hollow area 2133 not only ensures the overall support strength of the push portion 213 for the locking member 22, but also enables the locking member 22 to squeeze the push portion 213, causing a slight deformation of the push portion 213 to accommodate machining errors and / or assembly errors of the locking member 22 (due to the presence of errors, the locking member 22 may interfere with the first end of the linkage rod 21 in the rotation path of the linkage rod 21), thereby ensuring smooth rotation of the first end of the linkage rod 21 relative to the handlebar 14 and the bracket.

[0067] like Figures 8-11 As shown, the release mechanism 20 further includes a release assembly and a steel wire (not shown); the release assembly is movably connected to the handlebar tube 14; the steel wire is embedded in the cavity of the handlebar tube 14, one end of the steel wire is connected to the release assembly, and the other end of the steel wire is connected to the driver 23. The release assembly is configured to pull the steel wire by moving relative to the handlebar tube 14, and the steel wire drives the driver 23 to move relative to the handlebar tube 14, so that the driver 23 drives the locking member 22 to move relative to the frame 15 until it disengages from the first locking notch 211 or the second locking notch 212.

[0068] The release assembly serves as the release unit of the release mechanism 20 and is configured to move relative to the handlebar 14 under the action of a force. The specific structure of the release assembly will be described in detail below. The specific movable connection between the release assembly and the handlebar 14 is not limited herein, and designers may design a suitable connection based on actual needs. For example, the release assembly may be only slidably connected to the handlebar 14, in which case the release assembly, under the action of a force, slides relative to the handlebar 14 to pull the steel wire. Another example is the release assembly may be only rotationally connected to the handlebar 14, in which case the release assembly, under the action of a force, rotates relative to the handlebar 14 to pull the steel wire. Another example is the release assembly may be partially slidably connected to the handlebar 14, with the remaining portion rotationally connected to the handlebar 14, in which case a portion of the release assembly, under the action of a force, slides relative to the handlebar 14 to drive the remaining portion of the release assembly to rotate relative to the handlebar 14 to pull the steel wire. It should be noted that the force applied to the release assembly can be achieved manually by the user applying a pressing force to the release assembly, or can be achieved automatically by applying a mechanical transmission force to the release assembly with the help of a power source such as a motor.

[0069] When the bicycle frame 10 is in the unfolded state, the release assembly moves relative to the handlebar tube 14 under the action of force to pull the steel wire. The action of the steel wire drives the driving member 23 connected thereto to move relative to the handlebar tube 14. The action of the driving member 23 drives the locking member 22 abutting therewith to move relative to the frame body 15 until it is out of the first locking hole 211. At this time, since the locking member 22 is not inserted into the first locking hole 211, the locking member 22 does not limit the first end of the linkage rod 21. The first end of the linkage rod 21 can rotate relative to the handlebar tube 14 and the frame body 15, and the second end of the linkage rod 21 can rotate relative to the rear foot 12. In this way, the front foot 11, the rear foot 12, the seat tube 13, the handlebar tube 14 and the frame body 15 will rotate around their respective corresponding pivot points, so that the grounding end of the front foot 11 and the grounding end of the rear foot 12 gradually approach each other. Then the locking member 22 is inserted into the second locking hole 212, and the bicycle frame 10 can be switched from the unfolded state to the folded state. When the bicycle frame 10 is in the folded state, the release assembly moves relative to the handlebar tube 14 under the action of force to pull the steel wire. The action of the steel wire drives the driving member 23 connected thereto to move relative to the handlebar tube 14. The action of the driving member 23 drives the locking member 22 abutting therewith to move relative to the frame body 15 until it is out of the second locking hole 212. At this time, since the locking member 22 is not inserted into the second locking hole 212, the locking member 22 does not limit the first end of the linkage rod 21. The first end of the linkage rod 21 can rotate relative to the handlebar tube 14 and the frame body 15, and the second end of the linkage rod 21 can rotate relative to the rear foot 12. In this way, the front foot 11, the rear foot 12, the seat tube 13, the handlebar tube 14 and the frame body 15 will rotate around their respective corresponding pivot points, so that the grounding end of the front foot 11 and the grounding end of the rear foot 12 gradually move away from each other. Then the locking member 22 is inserted into the first locking hole 211, and the bicycle frame 10 can be switched from the folded state to the unfolded state.

[0070] Specifically, if Figure 10-11 As shown, the release assembly includes a rotating member 24 and a release member 25; the rotating member 24 is at least partially located in the cavity of the handlebar tube 14, and the rotating member 24 is rotatably connected to the handlebar tube 14, and one end of the steel wire is connected to the rotating member 24; the release member 25 at least partially extends out of the cavity of the handlebar tube 14, and the release member 25 is configured to drive the rotating member 24 to rotate relative to the handlebar tube 14 by moving relative to the handlebar tube 14 to pull the steel wire.

[0071] The rotating member 24 may include a turntable rotatably connected to the handlebar 14, with the end of the steel wire wrapped around the turntable. The corresponding release member 25 may include a release button slidably connected to the handlebar 14 and abutting the turntable. Under the action of force, the release button slides relative to the handlebar 14 to push the turntable, causing it to rotate relative to the handlebar 14, thereby pulling the steel wire. The rotating member 24 may also include a first gear rotatably connected to the handlebar 14, with the end of the steel wire wrapped around the rotating shaft of the first gear. The corresponding release member 25 may also include a second gear rotatably connected to the handlebar 14 and meshingly connected to the first gear. Under the action of force, the second gear rotates relative to the handlebar 14, driving the first gear to rotate relative to the handlebar 14, thereby pulling the steel wire.

[0072] By designing the release member 25 and the rotating member 24, the release member 25 moves relative to the handlebar tube 14 under the action of force, thereby driving the rotating member 24 to rotate relative to the handlebar tube 14, thereby pulling the steel wire. The movement of the steel wire drives the driving member 23 connected thereto to move relative to the handlebar tube 14. The movement of the driving member 23 drives the locking member 22 abutting therewith to move relative to the frame 15 until it disengages from the first locking hole 211 or the second locking hole 212.

[0073] like Figure 8-Figure 9 As shown, the driving member 23 moves along the preset direction OO' (eg Figure 1 The locking member 22 is slidably connected to the frame 15 along a preset direction OO'; the release mechanism 20 further includes a connecting member 26 and a first elastic member 27; the connecting member 26 is at least partially located in the cavity of the handlebar tube 14, the connecting member 26 is fixedly connected to the driving member 23, and the other end of the steel wire is connected to the connecting member 26; the first elastic member 27 is at least partially located in the cavity of the handlebar tube 14, the first elastic member 27 abuts between the connecting member 26 and the tube wall of the handlebar tube 14, and is suitable for generating elastic deformation along the preset direction OO'.

[0074] The predetermined direction OO' is the extending direction of the handlebar tube 14. The connecting member 26 serves as an intermediate connection structure between the steel wire and the driving member 23. The connecting member 26 can be, but is not limited to, a connecting rod or a connecting block. The first elastic member 27 can be, but is not limited to, a spring or a spring.

[0075] The connector 26 is designed to serve as an intermediate connection between the steel wire and the driver 23. By wrapping the end of the steel wire around the connector 26, the relative positions of the steel wire and the driver 23 are fixed. The connector 26 also provides support for the first elastic member 27, facilitating the installation of the first elastic member 27. The design of the first elastic member 27 allows the movement of the steel wire to drive the connector 26 connected thereto to move in a preset direction OO'. The movement of the connector 26 compresses the first elastic member 27, causing the first elastic member 27 to elastically deform in the preset direction OO'. When the force acting on the release member 25 is removed, the connector 26 automatically resets under the action of the elastic restoring force corresponding to the elastic deformation of the first elastic member 27, thereby causing the driver 23 to automatically reset. It should be noted that when the locking member 22 is inserted into the first locking hole 211 or the second locking hole 212, the first elastic member 27 has an initial elastic deformation, and the driving member 23 is positioned on the handlebar tube 14 under the action of the elastic restoring force corresponding to the initial elastic deformation of the first elastic member 27, which can effectively reduce the possibility of the driving member 23 loosening.

[0076] like Figure 8-Figure 9 As shown, the release mechanism 20 further includes a third elastic member 28. The third elastic member 28 is at least partially located within the cavity of the frame 15. The third elastic member 28 abuts between the locking member 22 and the wall of the frame 15. The third elastic member 28 is adapted to generate elastic deformation along a predetermined direction OO'. The third elastic member 28 may be, but is not limited to, a spring or a spring. By designing the third elastic member 28, the driving member 23 pushes the locking member 22 relative to the frame 15 in the predetermined direction OO'. The movement of the locking member 22 compresses the third elastic member 28, causing the third elastic member 28 to generate elastic deformation along the predetermined direction OO'. When the force acting on the release member 25 is removed, the locking member 22 automatically returns to its original position due to the elastic restoring force corresponding to the elastic deformation of the third elastic member 28, allowing it to be inserted into the first locking opening 211 or the second locking opening 212. It should be noted that when the locking piece 22 is inserted into the first lock port 211 or the second lock port 212, the third elastic piece 28 has an initial elastic deformation, and the locking piece 22 is pressed and inserted into the first lock port 211 or the second lock port 212 under the action of the elastic recovery force corresponding to the initial elastic deformation of the third elastic piece 28, thereby effectively improving the stability of the locking piece 22 inserted in the first lock port 211 or the second lock port 212.

[0077] like Figure 12-16As shown, the handlebar tube 14 includes a lower hand tube 141, an upper hand tube 142, and a locking / unlocking mechanism 143. The lower hand tube 141 is connected to the seat tube 13 via a pivot axis. The upper hand tube 142 is pivotally connected to the lower hand tube 141 at one end away from the pivot axis. The locking / unlocking mechanism 143 is disposed at the pivotal connection between the lower hand tube 141 and the upper hand tube 142. The locking / unlocking mechanism 143 has a locked state and an unlocked state. In the locked state, the locking / unlocking mechanism 143 is configured to lock the upper hand tube 142 to the lower hand tube 141, thereby fixing the position of the upper hand tube 142 relative to the lower hand tube 141. In the unlocked state, the locking / unlocking mechanism 143 is configured to unlock the upper hand tube 142 from the lower hand tube 141, thereby adjusting the position of the upper hand tube 142 relative to the lower hand tube 141. The locking / unlocking mechanism 143 can be switched between the locked and unlocked states. By designing the locking and unlocking mechanism 143, the user can use the locking and unlocking mechanism 143 to adjust the rotation angle of the upper hand tube 142 relative to the lower hand tube 141 as needed, thereby facilitating the user's grip. When the frame 10 is in the unfolded state, the user can use the locking and unlocking mechanism 143 to adjust the rotation angle of the upper hand tube 142 relative to the lower hand tube 141 as needed, thereby adjusting the upper hand tube 142 to a suitable angle for the user's grip. When the frame 10 is in the unfolded state, the user can use the locking and unlocking mechanism 143 to adjust the rotation angle of the upper hand tube 142 relative to the lower hand tube 141, thereby adjusting the upper hand tube 142 to be closer to the lower hand tube 141, thereby reducing the overall space occupied by the child stroller 1.

[0078] Specifically, if Figure 12-16As shown, the lower handlebar 141 includes a lower push handle 1411 and a first pivot seat 1412. The lower push handle 1411 is connected to the seat tube 13 via a pivot axis. The first pivot seat 1412 is fixedly connected to the end of the lower push handle 1411 away from the pivot axis. The upper handlebar 142 includes a second pivot seat 1422 and an upper push handle 1421. The second pivot seat 1422 is pivotally connected to the first pivot seat 1412 and has a locking groove 1422a. The end of the upper push handle 1421 is fixedly connected to the second pivot seat 1422. The locking / release mechanism 143 includes a locking member 1431, a second elastic member 1432, and a releasing member 1433. The locking member 1431 is slidably connected to the first pivot seat 1412. The second elastic member 1432 abuts between the locking member 1431 and the first pivot seat 1412 and is adapted to generate elastic deformation along the direction of movement of the locking member 1431. The releasing member 1433 is slidably connected to the second pivot seat 1422. When the locking / release mechanism 143 is in the locked state, the locking member 1431 engages with the locking groove 1422a. When the locking / release mechanism 143 is in the released state, the locking member 1431 disengages from the locking groove 1422a. The second elastic member 1432 may be, but is not limited to, a spring or a spring. When the lock / release mechanism 143 is in the locked state, the locking member 1431 engages with the locking groove 1422a. At this time, the locking member 1431 limits the second pivot seat 1422, preventing the second pivot seat 1422 from rotating relative to the first pivot seat 1412, thereby achieving relative fixation between the upper push handle 1421 and the lower push handle 1411. Under the action of force, the unlocking member 1433 slides relative to the second pivot seat 1422 to push against the locking member 1431, causing the locking member 1431 to disengage from the locking groove 1422a. At this time, the locking member 1431 no longer limits the second pivot seat 1422, allowing the second pivot seat 1422 to rotate relative to the first pivot seat 1412, thereby achieving adjustable angle between the upper push handle 1421 and the lower push handle 1411.

[0079] More specifically, if Figure 12-16As shown, the locking groove 1422a has a plurality of teeth and grooves distributed around the rotation axis of the second pivot seat 1422. The locking member 1431 includes a lock tooth that is slidably connected to the first pivot seat 1412 along the direction of the rotation axis of the second pivot seat 1422. The releasing member 1433 includes a release button that is slidably connected to the second pivot seat 1422 along the direction of the rotation axis of the second pivot seat 1422. The second elastic member 1432 includes a spring that abuts between the lock tooth and the inner wall of the first pivot seat 1412 and is adapted to generate elastic deformation along the direction of the rotation axis of the second pivot seat 1422. When the lock-release mechanism 143 is in the locked state, the multiple teeth of the lock tooth engage with the multiple teeth and grooves of the locking groove 1422a in a one-to-one correspondence. When the lock-release mechanism 143 is in the released state, the multiple teeth of the lock tooth disengage from all the teeth and grooves of the locking groove 1422a. In this design, when the lock-release mechanism 143 is in the locked state, the multiple teeth of the lock tooth are engaged with the multiple tooth grooves of the locking groove 1422a one by one. At this time, the lock tooth plays a circumferential limiting role on the second pivot seat 1422, and the second pivot seat 1422 cannot rotate relative to the first pivot seat 1412, thereby realizing the relative fixation of the position between the upper push handle 1421 and the lower push handle 1411, and further improving the stability when the position between the upper push handle 1421 and the lower push handle 1411 is relatively fixed. The user applies pressing pressure to the release button, and under the action of the pressing pressure, the release button slides relative to the second pivot seat 1422 along the direction of the rotation axis of the second pivot seat 1422 to push the lock teeth so that all the teeth of the lock teeth disengage from the multiple tooth grooves of the locking groove 1422a. At this time, the lock teeth do not limit the second pivot seat 1422, and the second pivot seat 1422 can rotate relative to the first pivot seat 1412, so that the angle between the upper push handle 1421 and the lower push handle 1411 can be adjusted.

[0080] Of course, in other embodiments, the locking groove 1422a includes a snap-fit ​​groove (not shown) formed in the second pivot seat 1422; the locking member 1431 may also include a wedge block (not shown) that is slidably connected to the first pivot seat 1412 along the direction of the rotation axis of the second pivot seat 1422; the releasing member 1433 includes a release block (not shown) that is slidably connected to the first pivot seat 1412 along the direction of the rotation axis of the second pivot seat 1422, and the end of the release block is fixedly connected to the wedge block; the second elastic member 1432 includes another spring (not shown) that abuts between the wedge block and the inner wall of the second pivot seat 1422 and is adapted to generate elastic deformation along the direction of the rotation axis of the second pivot seat 1422. When the lock-release mechanism 143 is in the locked state, the wedge block engages with the snap-fit ​​groove; when the lock-release mechanism 143 is in the released state, the wedge block disengages from the snap-fit ​​groove. It should be noted that the user applies a pulling force to the unlocking block, which drives the wedge block to squeeze the other spring and disengage the engaging slot, thereby allowing the second pivot seat 1422 to rotate relative to the first pivot seat 1412 to adjust the angle of the upper push handle 1421.

[0081] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0082] 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 principles of the present application should be included in the scope of protection of the present application.

Claims

1. A baby stroller, characterized in that: include: A bicycle frame comprising a front leg, a rear leg, a seat tube, a handlebar tube and a frame body, wherein the front leg is pivotally connected to the rear leg, the seat tube is pivotally connected to the front leg, the handlebar tube is fixedly connected to the frame body, and the handlebar tube and the frame body are connected to the seat tube via a pivot shaft; The release mechanism includes a linkage rod, a locking member, and a driving member, wherein the first end of the linkage rod is pivotally connected to the handlebar tube and the frame, and the first end of the linkage rod has a first locking opening and a second locking opening spaced apart around the axis of the pivot shaft, the second end of the linkage rod is pivotally connected to the rear foot, the locking member is movably connected to the frame, and the driving member is movably connected to the handlebar tube; Wherein, the frame has an unfolded state and a folded state; In the deployed state, the grounding end of the front foot and the grounding end of the rear foot are away from each other, and the locking member is inserted into the first locking opening, so that the positions of the front foot and the rear foot are relatively fixed; in the folded state, the grounding end of the front foot and the grounding end of the rear foot are close to each other, and the locking member is inserted into the second locking opening, so that the positions of the front foot and the rear foot are relatively fixed; the driving member is configured to drive the locking member to move relative to the frame body to disengage from the first locking opening or the second locking opening by moving relative to the handlebar, thereby switching the frame between the deployed state and the folded state.

2. The stroller according to claim 1, wherein: The first end of the linkage rod includes a pushing portion located between the first locking port and the second locking port; when the frame switches between the expanded state and the folded state, the pushing portion contacts the end of the locking member to push the locking member.

3. The stroller according to claim 2, wherein: The push portion has a first arcuate push surface closer to the first lock opening than the second lock opening, and a second arcuate push surface closer to the second lock opening than the first lock opening, wherein the first arcuate push surface and the second arcuate push surface are distributed around the axis of the pivot shaft; The first arc-shaped push surface has a first arc line in a plane perpendicular to the axis of the pivot shaft, the second arc-shaped push surface has a second arc line in the same plane, the axis of the pivot shaft has an intersection point in the same plane, the center distance between the first arc line and the intersection point is L1, the center distance between the second arc line and the intersection point is L2; ​​and L1<L2.

4. The stroller according to claim 2, wherein: The first locking opening and the second locking opening are symmetrically arranged about the axis of the pivot shaft.

5. The stroller according to claim 1, wherein: The release mechanism further comprises: a release assembly, movably connected to the handlebar tube; a steel wire embedded in the cavity of the handlebar tube, one end of the steel wire being connected to the release assembly, and the other end of the steel wire being connected to the driving member; Wherein, the release assembly is configured to pull the steel wire by moving relative to the handlebar tube, and drive the driving member to move relative to the handlebar tube through the steel wire, so that the driving member drives the locking member to move relative to the frame until it disengages from the first lock port or the second lock port.

6. The stroller according to claim 5, wherein: The release assembly comprises: a rotating member, at least partially located in the cavity of the handlebar tube and rotatably connected to the handlebar tube, one end of the steel wire being connected to the rotating member; The release member at least partially extends out of the cavity of the handlebar tube. The release member is configured to drive the rotating member to rotate relative to the handlebar tube by moving relative to the handlebar tube to pull the steel wire.

7. The stroller according to claim 5, wherein: The driving member is slidably connected to the handlebar along a preset direction, and the locking member is slidably connected to the frame along the preset direction; the release mechanism further includes: a connecting member, at least partially located in the cavity of the handlebar tube and fixedly connected to the driving member, the other end of the steel wire being connected to the connecting member; The first elastic member is at least partially located in the cavity of the handlebar tube and abuts between the connecting member and the tube wall of the handlebar tube. The first elastic member is adapted to generate elastic deformation along the preset direction.

8. The stroller according to any one of claims 1 to 7, characterized in that: The driver tube includes: a lower hand tube connected to the seat tube via the pivot shaft; an upper hand tube, the upper hand tube being pivotally connected to an end of the lower hand tube away from the pivot axis; A locking and unlocking mechanism is provided at the pivotal connection between the lower hand tube and the upper hand tube; In which, the locking and unlocking mechanism has a locked state and an unlocked state; in the locked state, the locking and unlocking mechanism is configured to lock the upper hand tube to the lower hand tube so that the position of the upper hand tube relative to the lower hand tube is fixed; in the unlocked state, the locking and unlocking mechanism is configured to unlock the upper hand tube to the lower hand tube so that the position of the upper hand tube relative to the lower hand tube is adjustable; the locking and unlocking mechanism can switch between the locked state and the unlocked state.

9. The stroller according to claim 8, wherein: The lower hand tube includes a lower push handle and a first pivot seat, the lower push handle is connected to the seat tube via the pivot shaft, and the first pivot seat is fixedly connected to an end of the lower push handle away from the pivot shaft; The upper hand tube includes a second pivot seat and an upper push handle, the second pivot seat is pivotally connected to the first pivot seat, the end of the upper push handle is fixedly connected to the second pivot seat, and the second pivot seat has a locking groove; The locking and unlocking mechanism includes a locking piece, a second elastic piece and a releasing piece, the locking piece is slidably connected to the first pivot seat, the second elastic piece abuts between the locking piece and the first pivot seat, and the second elastic piece is suitable for generating elastic deformation along the movement direction of the locking piece, and the releasing piece is slidably connected to the second pivot seat; when the locking and unlocking mechanism is in the locked state, the locking piece is engaged with the locking groove, and when the locking and unlocking mechanism is in the released state, the locking piece is disengaged from the locking groove.

10. The stroller according to claim 9, wherein: The locking groove has a plurality of tooth grooves, and the plurality of tooth grooves are distributed around the rotation axis of the second pivot seat; the locking member includes a locking tooth, and the locking tooth is slidably connected to the first pivot seat along the direction of the rotation axis of the second pivot seat; the releasing member includes a releasing button, and the releasing button is slidably connected to the second pivot seat along the direction of the rotation axis of the second pivot seat; the second elastic member includes a spring, and the spring abuts between the locking tooth and the inner wall of the first pivot seat, and the spring is suitable for generating elastic deformation along the direction of the rotation axis of the second pivot seat; when the lock-release mechanism is in the locked state, the plurality of teeth of the lock tooth are engaged with the plurality of tooth grooves in a one-to-one manner, and when the lock-release mechanism is in the released state, the plurality of teeth of the lock tooth are disengaged from the plurality of tooth grooves.

Images