Reversible stroller

Abstract

A fixing seat is arranged on a rear leg, a front leg is connected to the fixing seat, a first locking mechanism is arranged between the front leg and the rear leg, a push rod assembly is rotationally connected to the fixing seat, the stay position of the push rod assembly comprises a forward position and a reverse position, and a second locking mechanism is arranged between the push rod assembly and the fixing seat. The staying position of the push rod assembly further comprises a folding position, the upper end of the push rod assembly is connected with an unlocking piece used for unlocking the second locking mechanism, the inner side of the fixing base is provided with a rotating cover capable of rotating relative to the fixing base, the rotating cover is provided with an unlocking part capable of unlocking the push rod assembly in the forward direction when the rotating cover rotates, and the rotating cover is connected with a bearing assembly. A third locking mechanism is arranged between the rotating cover and the fixed seat, a driving piece capable of driving the third locking mechanism to unlock when the bearing assembly is folded is arranged on the bearing assembly, and a linkage piece capable of being linked with the first locking mechanism to unlock when the third locking mechanism is unlocked is further arranged in the fixed seat. Reversing and folding operation is convenient.

Description

[Technical Field]

[0001] This invention relates to a reversible stroller. [Background Technology]

[0002] As a common mode of transportation for infants and toddlers, the ease of use and functionality of strollers are important design considerations. To facilitate user observation of the infant's condition inside the stroller or interaction with the infant while pushing it, some foldable and reversible strollers have emerged on the market. A common reversible design involves a rotatable push rod assembly that can rotate relative to the frame and lock in a forward or reverse position, allowing for quick reversal without removing the seat. Currently, these reversible strollers on the market exhibit a variety of structures, with varying reversible and folding mechanisms. Therefore, this invention provides a reversible stroller that differs from traditional strollers. [Summary of the Invention]

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reversible child stroller with a simple structure and convenient reversible and folding operation.

[0004] This invention is achieved through the following technical solution:

[0005] A reversible stroller includes rear legs, a rear wheel assembly at the lower end of the rear legs, and a fixed seat at the upper end of the rear legs. A front leg, rotatably connected to the fixed seat about a first axis E, is capable of unfolding or folding relative to the rear legs. A front wheel assembly is located at the lower end of the front legs. A first locking mechanism is provided between the front legs and the rear legs to lock them in their unfolded state. A push rod assembly is rotatably connected to the fixed seat about a second axis F. The push rod assembly has two positions: a forward position for pushing the stroller forward and a reverse position for pushing the stroller backward after rotating relative to the fixed seat. When the push rod assembly is in the forward position, its upper end is above the rear wheel assembly; when it is in the reverse position, its upper end is above the front wheel assembly. The push rod assembly and the fixed seat are connected in a reversible manner. A second locking mechanism is provided between the fixed base and the fixed base for locking it in the forward or reverse position. The position where the push rod assembly stops also includes a folding position that can rotate and close to the rear leg after the second locking mechanism is unlocked. The upper end of the push rod assembly is connected to an unlocking part for unlocking the second locking mechanism. The inner side of the fixed base is provided with a rotating cover that can rotate relative to it. The rotating cover is provided with an unlocking part that can unlock the push rod assembly in the forward position when it rotates. The rotating cover is connected to a foldable support assembly for carrying infants and young children. A third locking mechanism is provided between the rotating cover and the fixed base. The support assembly is provided with a driving part that can drive the third locking mechanism to unlock when it is folded. The fixed base is also provided with a linkage part that can be linked to unlock the first locking mechanism when the third locking mechanism is unlocked.

[0006] The second locking mechanism includes a locking member slidably disposed within the push rod assembly. The fixed base is provided with a forward locking position and a reverse locking position that can engage or disengage with the locking member. When the locking member engages with the forward locking position, the push rod assembly remains in the forward position. When the locking member engages with the reverse locking position, the push rod assembly remains in the reverse position. The unlocking member includes an unlocking block movably disposed at the upper end of the push rod assembly. A first pull rope is provided between the unlocking block and the locking member, which can pull the locking member out of the forward or reverse locking position when the unlocking block moves. A second return spring is provided between the push rod assembly and the unlocking block, which can push the unlocking block to reset. An elastic element is provided between the push rod assembly and the locking member, which can push the locking member to reset.

[0007] The unlocking part includes an unlocking groove provided on the rotating cover and having an inclined groove wall. The locking member is provided with a protrusion that extends into the unlocking groove and abuts against the inclined groove wall. When the rotating cover rotates relative to the fixed seat, the inclined groove wall pushes the protrusion, causing the locking member to slide out of the forward locking position.

[0008] The first locking mechanism includes a locking position on a fixed base, a locking block that can engage or disengage from the locking position is slidably provided on the upper end of the front leg, the locking block is connected to a linkage member and can be driven by the linkage member to disengage from the locking position, and a first return spring that can push the locking block back to its original position is provided between the locking block and the front leg.

[0009] The linkage includes a rotating rod rotatably connected to the fixed base. One end of the rotating rod is connected to the third locking mechanism. When the third locking mechanism is unlocked, the rotating rod is pushed by the moving third locking mechanism and rotates relative to the fixed base. The other end of the rotating rod is movably connected to a sliding block. When the rotating rod rotates relative to the fixed base, the sliding block is driven to slide relative to the fixed base. The sliding block and the locking block are engaged by an inclined surface so that when the sliding block slides, it can push the locking block to disengage from the locking position.

[0010] The third locking mechanism includes a locking groove on the rotating cover, and a locking block that can engage or disengage from the locking groove is slidably provided in the fixed seat. One end of the locking block abuts against the rotating rod, and the other end abuts against the push block provided in the rotating cover. The push block abuts against the driving component. When the bearing assembly is folded, the driving component pushes the locking block to move through the push block, thereby unlocking the third locking mechanism. A third return spring that can push the locking block to reset is provided between the locking block and the fixed seat.

[0011] The supporting component includes a connecting seat that can be fixed to the rotating cover. A seat and a backrest that can be unfolded or folded relative to the seat are rotatably connected to the connecting seat. The connecting seat has a locking groove. A locking rod that engages or disengages from the locking groove is slidably provided in the backrest. A handle is movably connected to the upper end of the backrest. A second pull rope that can pull the locking rod to disengage from the locking groove is provided between the handle and the locking rod. A sixth return spring that can push the locking rod to reset is also provided between the backrest and the locking rod. The driving component includes a driving block that is slidably disposed in the connecting seat. A transverse column is provided on the driving block. A pushing part that can push the transverse column to move the driving block when it is rotated and folded relative to the seat is provided on the backrest. The seat has a locking groove. A locking block that engages with the locking groove is slidably provided in the connecting seat. A pushing part that engages with the inclined surface of the locking block and can push the locking block to disengage from the locking groove when the backrest is rotated and folded relative to the seat is provided between the locking block and the connecting seat. A fourth return spring that can push the locking block to reset is provided between the locking block and the connecting seat.

[0012] The connecting seat includes an outer seat body and an inner seat body fixedly connected thereto. The outer seat body is connected to the rotating cover. The engaging block and the driving component are disposed in the outer seat body. The backrest and the seat part are disposed between the outer seat body and the inner seat body. The inner seat body is also connected to an armrest that can rotate and unfold or retract relative to it. The armrest is provided with a slot. The inner seat body is provided with a locking block that can engage or disengage with the slot. The locking block is connected to the engaging block. When the engaging block disengages from the engaging slot, the engaging block drives the locking block to disengage from the slot. A fifth return spring is provided between the locking block and the inner seat body that can push the locking block to reset.

[0013] The connecting seat and rotating cover are detachably connected, allowing the load-bearing component to be connected to the fixed seat in either a forward or reverse direction. The locking rod has a protruding convex shaft on one side. The seat portion has a positioning groove that allows the convex shaft to enter when the backrest rotates and retracts relative to it. When the convex shaft is in the positioning groove, the locking rod remains disengaged from the locking groove. The seat portion also has a recessed groove, and a moving block is laterally slidable on one side of the backrest. The moving block abuts against the groove wall on one side of the recessed groove via an inclined surface. When the backrest rotates and retracts relative to the seat portion, the groove wall of the recessed groove pushes the moving block to extend to the other side of the backrest. The moving block is positioned to push the horizontal column. A seventh return spring is provided between the moving block and the backrest to push the moving block back to its original position. When the supporting component is connected to the fixed seat in the forward direction and the stroller needs to be folded, the relatively folded seat and backrest rotate together relative to the connecting seat, causing the moving block to push the horizontal column. This causes the drive block to drive the third locking mechanism to unlock. When the supporting component is connected to the fixed seat in the reverse direction and the stroller needs to be folded, the backrest rotates relative to the seat, causing the pushing part to push the horizontal column to move. This causes the drive block to drive the third locking mechanism to unlock.

[0014] The connecting seat has a connecting groove with an opening facing the direction. The rotating cover has a locking seat that can be detachably connected to the connecting groove. The armrest is connected to a connecting post that passes through the backrest, the seat and the connecting seat. A locking post is slidably provided in the connecting post. The rotating cover has a locking hole that can engage or disengage with the locking post. A third pull rope is connected to the locking post that can disengage it from the locking hole. An eleventh return spring is provided in the connecting post that can push the locking post to reset.

[0015] Compared with the prior art, the present invention has the following advantages: The push rod assembly of the reversible stroller of the present invention can rotate relative to the fixed seat. When the front and rear legs are in the unfolded state, the push rod assembly can rotate to the forward or reverse position and be locked by the second locking mechanism, so that the user can be in a face-to-face position or facing the same direction as the child in the carrying assembly. More importantly, when the stroller needs to be folded, the carrying assembly is folded first, and during the folding process, the third locking mechanism is unlocked by the drive component, so that the carrying assembly and the rotating cover rotate relative to the fixed seat to their storage position. During the rotation, the rotating cover unlocks the second locking structure through its unlocking part, so that the push rod assembly in the forward position can rotate to the folded position under its own gravity after unlocking. During the unlocking of the third locking mechanism, the linkage component also drives the first locking mechanism to unlock, so that the front and rear legs are in the unlocked state. At this state, when the stroller is lifted, the front and rear legs will rotate relative to each other and come together, thereby completing the folding operation of the stroller. Therefore, when the present invention needs to change direction, the second locking mechanism is unlocked by the unlocking part to realize the rotation and direction change of the push rod assembly. When folding is required, the bearing assembly is folded first to make the rotating cover rotate in linkage and the second locking mechanism is unlocked by the unlocking part. This allows the stroller to change direction and fold smoothly. Moreover, when folding, the various parts are linked, making the folding operation very convenient and quick. [Attached Image Description]

[0016] Figure 1 This is a perspective view of the present invention without the supporting components;

[0017] Figure 2 yes Figure 1 Enlarged view at point A in the middle;

[0018] Figure 3 This is a perspective view of the folding process after the supporting components are removed in this invention;

[0019] Figure 4 This is one of the exploded views of the components of the present invention;

[0020] Figure 5 This is a second exploded view of the components of the present invention;

[0021] Figure 6 This is the third exploded view of the components of the present invention;

[0022] Figure 7 This is a cross-sectional view of a component of the present invention;

[0023] Figure 8 This is the fourth exploded view of the components of the present invention;

[0024] Figure 9 This is the fifth exploded view of the components of the present invention;

[0025] Figure 10 This is the sixth exploded view of the components of the present invention;

[0026] Figure 11 This is the seventh exploded view of the components of the present invention;

[0027] Figure 12 This is the eighth exploded view of the components of the present invention;

[0028] Figure 13 This is the ninth exploded view of the components of the present invention;

[0029] Figure 14 yes Figure 13 Enlarged view at point B;

[0030] Figure 15 This is the tenth exploded view of the components of the present invention;

[0031] Figure 16 yes Figure 15 A magnified view at point C;

[0032] Figure 17 yes Figure 15 A magnified view at point D;

[0033] Figure 18 This is a perspective view of the present invention when the push rod assembly is in the positive position;

[0034] Figure 19 This is a side view of the present invention when the push rod assembly is in the forward position;

[0035] Figure 20 This is a side view of the invention in its folded state;

[0036] Figure 21 This is a perspective view of the carrier component of the present invention;

[0037] Figure 22 yes Figure 21 A magnified view at point G in the middle;

[0038] Figure 23 This is a perspective view of the connector of the present invention;

[0039] Figure 24 This is an exploded view of the components of the present invention, number eleven.

[0040] Figure 25 This is the twelfth exploded view of the components of the present invention;

[0041] Figure 26 This is exploded view thirteen of the components of the present invention;

[0042] Figure 27 This is the fourteenth exploded view of the components of the present invention;

[0043] Figure 28 This is a side view of the present invention when the push rod assembly is in the reverse position;

[0044] Figure 29 This is a side view of the present invention when the push rod assembly is in the forward position and the bearing assembly is installed in the forward position;

[0045] Figure 30 This is a side view of the present invention when the push rod assembly is in the reverse position and the bearing assembly is installed in the forward position.

Detailed Implementation Methods

[0046] The present invention will now be further described with reference to the accompanying drawings:

[0047] like Figure 1 , Figure 3 as well as Figures 18 to 20 As shown, this embodiment provides a reversible stroller, including a frame body, a load-bearing component 4, and a wheel assembly. The frame body mainly includes rear legs 11, front legs 14, a fixed seat 13, and a push rod assembly 3, which are important structures for realizing the stroller's unfolding, folding, and reversing functions.

[0048] like Figure 1 , Figure 6 and Figure 7 As shown, a fixing seat 13 is fixedly connected to the upper end of the rear leg 11. The fixing seat 13 serves as a connecting hub for multiple moving parts, and its structure preferably includes an outer connecting body 133 and an inner connecting body 134 fixed together by connectors (such as screws) to form a stable installation space. A front leg 14 is rotatably connected to the fixing seat 13 about a first axis E. The front leg 14 can be unfolded relative to the rear leg 11 to a use state or folded into a folded state.

[0049] like Figure 1 as well as Figures 15 to 17As shown, a rear wheel assembly 12 is provided at the lower end of the rear leg 11. Specifically, the rear wheel assembly 12 includes a rear fork 122 with a rear connecting shaft 121, and a rear wheel 123 is connected to the rear fork 122. The rear wheel assembly 12 is rotatably connected to the lower end of the rear leg 11 via the rear connecting shaft 121, allowing the rear wheel assembly 12 to rotate freely in the horizontal plane, facilitating pushing and steering. A front wheel assembly 15 is provided at the lower end of the front leg 14, and its structure is similar to that of the rear wheel assembly 12, including a front fork 152 with a front connecting shaft 151 and a front wheel 153 connected to the front fork 152. The front wheel assembly 15 can also rotate freely in the horizontal plane.

[0050] like Figure 6 As shown, to ensure the stability of the trolley in the unfolded state, a first locking mechanism 21 is provided between the front leg 14 and the rear leg 11. Specifically, the first locking mechanism 21 includes a locking position 211 disposed on the fixed base 13 (e.g., on the external connecting body 133). A locking block 212 is slidably mounted on the upper end of the front leg 14. The locking block 212 can engage with the locking position 211 under the push of the first return spring 213, thereby locking the front leg 14 in the unfolded position. When it is necessary to fold the trolley, the locking block 212 can be driven by the linkage 27 (described in detail below) to overcome the elastic force of the first return spring 213, causing it to disengage from the locking position 211, and then the front leg 14 can rotate relative to the rear leg 11 to fold.

[0051] like Figure 1 , Figure 3 , Figure 7 as well as Figure 18 and Figure 19 As shown, a push rod assembly 3 is rotatably connected to the fixed base 13 about the second axis F. The push rod assembly 3 includes a lower push rod 31 and an upper push rod 32 telescopically connected within the lower push rod 31 via a locking mechanism 33. The push rod assembly 3 can rotate relative to the fixed base 13 and remain in three main positions: forward, reverse, and folded. When the push rod assembly 3 is in the forward position, its upper end (i.e., the hand grip) is above the rear wheel assembly 12, and the stroller is in the traditional forward-pushing mode. When the push rod assembly 3 is in the reverse position, its upper end is above the front wheel assembly 15, and the stroller is switched to a rearward-pushing mode. By selecting different positions of the push rod assembly 3, the user can interact face-to-face with the child in the carrying assembly 4 or move in the same direction as the child, allowing the user to push the stroller according to actual needs. When the push rod assembly 3 is moved to the folded position, the entire stroller is folded. The specific folding operation is detailed later.

[0052] like Figures 8 to 12As shown, in order to securely lock the push rod assembly 3 in the forward or reverse position, a second locking mechanism 22 is provided between the push rod assembly 3 and the fixed base 13. The second locking mechanism 22 includes a locking member 221 slidably disposed within the lower push rod 31 of the push rod assembly 3. The locking member 221 is preferably a locking rod 2211, with a locking pin 2212 on one side. Correspondingly, a forward locking position 222 and a reverse locking position 223 are provided on the fixed base 13. When the push rod assembly 3 rotates to the forward position, the locking pin 2212 is pushed into the forward locking position 222 by the elastic element 224 (such as a spring); when rotated to the reverse position, it is locked into the reverse locking position 223, thereby achieving reliable locking. This locking mechanism has a compact structure, secure locking, and effectively prevents the push rod from rotating accidentally during the pushing process, ensuring pushing safety. An unlocking member 24 is connected to the upper end of the push rod assembly 3 for operating the second locking mechanism 22 to unlock. The unlocking member 24 includes an unlocking block 241 movably disposed at the upper end of the upper push rod 32. The unlocking block 241 is connected to the locking member 221 inside the lower push rod 31 via the first pull rope 242. When the unlocking block 241 is pressed, the first pull rope 242 pulls the locking member 221 to overcome the elastic force of the elastic element 224, causing the locking pin 2212 to disengage from the forward locking position 222 or the reverse locking position 223, thereby releasing the lock on the push rod assembly 3 and allowing it to rotate. A second return spring 243 is provided between the push rod assembly 3 and the unlocking block 241 to automatically reset the unlocking block 241 after operation.

[0053] like Figures 1 to 6 ,as well as Figure 10 and Figure 11 As shown, a rotating cover 16 is provided on the inner side of the fixed base 13 (i.e., the inner side of the inner connecting body 134) that can rotate relative to it. A support component 4 for carrying infants and young children is connected to the rotating cover 16. The rotating cover 16 is provided with an unlocking part 25, which is used to unlock the second locking mechanism 22 when the support component 4 is folded. Specifically, the unlocking part 25 includes an unlocking groove 252 formed on the rotating cover 16, which has an inclined groove wall 251. At the same time, a protrusion 225 extending into the unlocking groove 252 is provided on the locking member 221 (locking rod 2211) of the second locking mechanism 22. When the user needs to fold the stroller, the support component 4 is folded first. During the folding process, the support component 4 will drive the rotating cover 16 to rotate relative to the fixed base 13. During the rotation of the rotating cover 16, the inclined groove wall 251 of the unlocking groove 252 will push against the protrusion 225, forcing the locking member 221 to move, thereby causing the locking pin 2212 to disengage from the forward locking position 222. This design enables the second locking mechanism 22 to be unlocked by the load-bearing component 4 during the folding process when the stroller needs to be folded. The second locking mechanism 22 can be unlocked by the unlocking part 24 to achieve reversal or by the unlocking part 25 to achieve folding of the whole stroller, making it convenient for users to perform folding operations.

[0054] like Figures 5 to 11As shown, a third locking mechanism 23 is provided between the rotating cover 16 and the fixed base 13. The third locking mechanism 23 includes a locking groove 231 provided on the rotating cover 16. A locking block 232 is slidably disposed in the fixed base 13. Under the push of the third return spring 234, the locking block 232 can be locked into the locking groove 231 to achieve locking. A driving member 26 is provided on the bearing assembly 4. When the bearing assembly 4 is folded, the driving member 26 will move and drive the third locking mechanism 23 to unlock. The specific connection relationship is: the driving member 26 abuts against a push block 233, which is disposed in the rotating cover 16 and abuts against one end of the locking block 232. The other end of the locking block 232 abuts against a linkage member 27. When the bearing assembly 4 is triggered during the folding process of the driving member 26, the push block 233 pushes the locking block 232 to move, causing it to disengage from the locking groove 231, thereby unlocking the third locking mechanism 23. Furthermore, during this process, the linkage 27 also causes the first locking mechanism 21 to unlock. Specifically, the linkage 27 includes a rotating rod 271 rotatably connected to the fixed base 13. One end of the rotating rod 271 abuts against the locking block 232 of the third locking mechanism 23. When the locking block 232 is driven to move downward, it pushes the rotating rod 271 to rotate around its fulcrum. The other end of the rotating rod 271 is movably connected to a sliding block 272. Specifically, a movable hole 273 can be opened on the rotating rod 271, and a protrusion 274 inserted into the movable hole 273 can be provided on the sliding block 272. When the rotating rod 271 rotates, the protrusion 274 slides in the movable hole 273 and rotates relative to the rotating rod 271, thereby driving the sliding block 272 to move upward. The sliding block 272 and the locking block 212 of the first locking mechanism 21 are engaged by an inclined surface. Therefore, the upward movement of the sliding block 272 can push the locking block 212 to slide, causing it to overcome the elastic force of the first return spring 213 and disengage from the locking position 211, thereby unlocking the first locking mechanism 21. By setting the driving component 26 and the linkage component 27, the automatic association between the folding action of the carrying component 4 and the unlocking of the first locking mechanism 21, the second locking mechanism 22 and the third locking mechanism 23 is realized. When the user folds the carrying component 4, the entire stroller is automatically unlocked, simplifying the folding process and making the folding operation smoother and more efficient. In actual folding, as long as the carrying component 4 is folded, it rotates relative to the fixed seat 13 of the rotating cover 16 to the folding position, and the push rod component 3 rotates to its folding position under its own gravity. At this time, the user only needs to lift the stroller upward, and the front legs 14 and the rear legs 11 can fold together. The entire folding operation is very convenient and quick.

[0055] like Figures 21 to 27As shown, the support assembly 4 includes a connecting seat 41, a seat portion 42, and a backrest 43. The connecting seat 41 is detachably connected to the rotating cover 16, allowing the entire support assembly 4, including the seat portion 42 and the backrest 43, to be installed facing forward or backward. Furthermore, after the support assembly 4 is detached via the connecting seat 41, a bassinet for smaller infants can be attached to the fixing base 13. When the user is carrying an older child, the bassinet is detached and the support assembly 4, including the seat portion 42 and the backrest 43, is attached. The support assembly 4 can be installed facing forward or backward for user convenience. The connecting seat 41 preferably includes an outer seat body 411 and an inner seat body 412 fixedly connected together. The outer seat body 411 is connected to the rotating cover 16. The seat portion 42 and the backrest 43 are disposed between the outer seat body 411 and the inner seat body 412. The backrest 43 is rotatably connected to the connecting seat 41 and can be unfolded or folded relative to the seat portion 42. To lock the backrest 43 in its unfolded position, a locking groove 441 is provided on the connecting seat 41, and a locking rod 442 is slidably provided inside the backrest 43. The locking rod 442 can be engaged into the locking groove 441 under the push of the sixth return spring 445. A handle 443 is movably connected to the upper end of the backrest 43, and the handle 443 is connected to the locking rod 442 via a second pull rope 444. Pulling the handle 443 upwards pulls the locking rod 442 to overcome the spring force and disengage from the locking groove 441, thereby allowing the backrest 43 to rotate and retract. Furthermore, when the backrest 43 rotates and retracts relative to the seat portion 42, its pushing part 432 engages with the inclined surface of the locking block 452 inside the connecting seat 41, pushing the locking block 452 to overcome the fourth return spring 453 and disengage from the locking groove 451 on the seat portion 42, thus unlocking the seat portion 42 from the connecting seat 41. During the rotation and folding of the backrest 43, the pushing part 431 on the backrest 43 pushes the driving member 26 to move, so that the driving member 26 drives the third locking mechanism 23 to unlock. Specifically, the driving member 26 is disposed in the connecting seat 41 (outer seat body 411) and includes a slidable driving block 261, on which a transverse post 262 is arranged laterally. When the backrest 43 rotates and folds, the pushing part 431 pushes the transverse post 262, so that the driving block 261 pushes the pushing block 233.

[0056] Furthermore, the ingenious aspect of this embodiment lies in the fact that the triggering method of the drive component 26 can adapt to the installation direction (forward or reverse) of the support component 4. For example... Figure 26 and Figure 27As shown, the locking rod 442 has a protruding shaft 481 protruding to one side, and the seat part 42 has a positioning groove 482. When the locking rod 442 exits the locking groove 441 and the backrest 43 rotates and retracts relative to the seat part 42, the protruding shaft 481 will enter the positioning groove 482. The seat part 42 also has a recessed groove 491, and a moving block 492 is laterally slidable on one side of the backrest 43. The moving block 492 and the groove wall of the recessed groove 491 are engaged by abutting against each other through an inclined surface. When the backrest 43 rotates and retracts relative to the seat part 42, the groove wall of the recessed groove 491 pushes the moving block 492 to extend to the other side of the backrest 43 to a position that can push the transverse column 262. A seventh return spring 493 is provided between the moving block 492 and the backrest 43 to push the moving block 492 back to its original position. The specific working principle is: when the bearing component 4 moves in the opposite direction (e.g. Figure 19 Connected to the fixed base 13, when the vehicle is to be folded down, the backrest 43 is rotated to fold down relative to the seat 42. The pusher 431 on the backrest 43 pushes the transverse column 262 to move, thereby causing the drive block 261 to drive the third locking mechanism 23 to unlock, and the first locking mechanism 21 to unlock through the linkage 27. During this process, the engaging block 452 also disengages from the engaging groove 451, and the backrest 43, seat 42, connecting base 41 and rotating cover 16 can rotate backward relative to the fixed base 13 to unlock the second locking mechanism 22. When the bearing assembly 4 is in the forward direction (e.g.) Figure 29When the stroller is connected to the fixed seat 13 and needs to be folded, folding the stroller requires first rotating the backrest 43 forward onto the seat 42, and then rotating the seat 42 and backrest 43 as a whole backward to rotate the rotating cover 16 backward to drive the second locking mechanism 22 to unlock. Specifically, the action is as follows: pull the handle 443 to disengage the locking rod 442 from the locking groove 441, and then rotate the backrest 43 relative to the seat 42. The pushing part 431 on the backrest 43 pushes the transverse column 262. The drive block 261 slides and pushes the push rod 233, compressing the third return spring 234. During the rotation of the backrest 43, the moving block 492 on it abuts against the inclined groove wall of the recessed groove 491 on the seat part 42. The groove wall of the recessed groove 491 pushes the moving block 492 to extend to the other side of the backrest 43. During this process, the convex shaft 481 on the locking rod 442 enters the positioning groove 482 on the seat part 42, and the locking block 452 disengages from the locking groove 451. At this time, the backrest 43 moves closer to the seat. On the seat 42, the seat 42 rotates relative to the connecting seat 41. However, at this time, the rotating cover 16 cannot rotate backward to drive the second locking mechanism 22 to unlock. It can only be done by external force to make the backrest 43 and the seat 42, which are folded together, rotate backward together. When the backrest 43 and the seat 42 rotate backward together relative to the connecting seat 41, the positioning groove 482 prevents the locking rod 442 from falling into the locking groove 441. Moreover, since the moving block 492 and the pushing part 431 have a certain distance, the backrest 43 and the seat 42 can rotate backward together. During the rearward rotation of the seat 42, the drive block 261 returns to its original position under the action of the third return spring 234. However, as the backrest 43 and seat 42 continue to rotate rearward, the moving block 492 presses against the transverse column 262, causing the drive block 261 to slide downward again and unlock the third locking mechanism 23. When the seat 42 and backrest 43, folded together, rotate to the set position, the rotating cover 16 also rotates relative to the fixed seat 13, thereby unlocking the second locking mechanism 22. Therefore, in this embodiment, regardless of whether the supporting component 4 is installed facing forward or backward, the user can achieve simultaneous unlocking and folding of the entire stroller.

[0057] like Figure 21 , Figure 26 and Figure 27 As shown, an armrest 46 is also connected to the inner seat 412, which can rotate and unfold or retract relative to it for children to grip. The armrest 46 has a slot 471, and the inner seat 412 has a locking block 472 that can engage or disengage from the slot 471. The locking block 472 is connected to a locking block 452. When the locking block 452 disengages from the slot 451, the locking block 452 causes the locking block 472 to disengage from the slot 471. Therefore, when the backrest 43 rotates relative to the seat 42, the armrest 46 can also rotate and move closer to the seat 42 under its own weight. A fifth return spring 473 is provided between the locking block 472 and the inner seat 412 to push the locking block 472 back to its original position.

[0058] like Figure 2 and Figure 26 As shown, the detachable connection between the connecting seat 41 and the rotating cover 16 can be achieved in the following way: the connecting seat 41 is provided with a connecting groove 413 facing the opening, and the rotating cover 16 is provided with a locking seat 161 that can be inserted into the connecting groove 413. For further reinforcement, the connecting post 461 connected to the armrest 46 passes through the backrest 43, the seat part 42 and the connecting seat 41. The connecting post 461 is provided with a locking post 401, which can be inserted into the locking hole 402 on the rotating cover 16 under the action of the eleventh return spring 404. The lock can be released by pulling the third pull rope 403 connected to the locking post 401. After the locking post 401 is disengaged from the locking hole 402, the supporting component 4 can be lifted upwards to remove it.

[0059] like Figure 1 , Figure 8 and Figures 11 to 14As shown, the telescopic function of the push rod assembly 3 is achieved through a locking mechanism 33. The locking mechanism 33 includes multiple locking holes 331 arranged axially on the lower push rod 31. A connecting block 34 is fixed inside the upper push rod 32, and a locking pin 333 is slidably disposed inside the connecting block 34. The locking pin 333 can be engaged with any of the locking holes 331 under the push of the thirteenth return spring 336 to lock the extended length of the upper push rod 32. A sliding rod 332 is also slidably disposed inside the connecting block 34, and the sliding rod 332 and the locking pin 333 are engaged by a bevel. When the height needs to be adjusted, the locking pin 333 can be forced to retract and disengage from the locking hole 331 by pulling the sliding rod 332 upward. For a more compact structure, an unlocking block 241 is used to unlock the second locking mechanism 22, and is also connected to the sliding rod 332 of the locking mechanism 33 through a fourth pull rope 334. The unlocking block 241 is connected to the first pull rope 242 and the fourth pull rope 334 through a slider 244. This means that operating the unlocking block 241 can simultaneously or sequentially control the unlocking of the push rod extension lock and the second locking mechanism. To distinguish between the two operations of "adjusting only the extension length of the upper push rod 32 (requiring unlocking the locking mechanism 33)" and "reversing (requiring unlocking the second locking mechanism 22)," a control block 5 is provided at the upper end of the upper push rod 32. The control block 5 can move between a first position and a second position, and is provided with a reset force by the fourteenth spring 6. When the control block 5 is in the first position, its blocking part 51 abuts against the bottom of the groove 246 on the unlocking block 241, limiting the travel of pressing the unlocking block 241. This travel is only enough to pull the sliding rod 332 through the fourth pull rope 334, causing the locking pin 333 to disengage from the locking hole 331, but not enough to pull the locking member 221 through the first pull rope 242. At this time, the height adjustment of the upper push rod 32 can be safely performed without accidentally unlocking the second locking mechanism 22. When reversing is required, press down to slide the control block 5 to the second position. At this time, the clearance part 52 of the control block 5 aligns with the clearance groove 247 on the unlocking block 241, the obstruction is released, and the travel of the unlocking block 241 can be increased. During this travel, the sliding rod 332 can be pulled to unlock the extension / retraction mechanism, and the locking member 221 can be pulled by the first pull rope 242 to disengage it from the forward locking position 222 or the reverse locking position 223. Considering the length change during the extension / retraction of the push rod, the middle part of the first pull rope 242 wraps around at least one loop 245 within the connecting block 34. This is equivalent to a cable compensation mechanism, allowing the effective traction length of the first pull rope 242 to adapt adaptively during the extension / retraction of the upper push rod 32, ensuring that the first pull rope 242 operation is always effective and not too tight or too loose. This compensation structure is ingeniously designed, ensuring that the upper push rod 32 can both extend and retract, and that the reversing unlocking function is reliable and effective. Specifically, when the upper push rod 32 retracts, the aforementioned loop 245 becomes larger; when the upper push rod 32 extends outward, the loop 245 becomes smaller.

[0060] like Figure 11 , Figure 12 as well as Figures 15 to 17As shown, the stroller also includes a wheel orientation assembly, which is linked to the reversing action of the push rod. The wheel orientation assembly includes a movable seat 71 slidably disposed within the fixed base 13. A front pull rope 72 is threaded through the front leg 14, one end of which is connected to the front side of the movable seat 71, and the lower end is connected to a front positioning pin 74. The front positioning pin 74 can be engaged with the front orientation hole 73 on the front fork 152 under the action of the eighth return spring 75. Similarly, a rear pull rope 76 is threaded through the rear leg 11, the upper end of which is connected to the rear side of the movable seat 71, and the lower end is connected to a rear positioning pin 78. The rear positioning pin 78 can be engaged with the rear orientation hole 77 on the rear fork 122 under the action of the ninth return spring 79. The fixed base 13 is provided with a first fulcrum 131 and a second fulcrum 132 for changing the force transmission direction of the front pull rope 72 and the rear pull rope 76. The movement of the movable seat 71 is controlled by the lower end of the push rod assembly 3. The lower end of the lower push rod 31 is provided with a pushing arc surface 301. The upper end of the movable seat 71 is provided with a transverse column 70 that abuts against the push-up arc surface 301. The fixed seat 13 is also provided with a tenth return spring 17 that pushes the movable seat 71. When the push rod assembly 3 rotates from the forward position to the reverse position, the push-up arc surface 301 at its lower end pushes the transverse column 70 of the movable seat 71, forcing the movable seat 71 to move downward. At this time, the movable seat 71 will tighten the rear pull rope 76 and loosen the front pull rope 72. At this time, the rear positioning pin 78 is pulled out of the rear directional hole 77 by the tightened rear pull rope 76 overcoming the spring force, so that the rear wheel assembly 12 is deoriented and can turn freely in the horizontal direction (as a steering wheel). The front positioning pin 74 is locked into the front directional hole 73 under the action of its eighth return spring 75, so that the front wheel assembly 15 is oriented and cannot turn (as a directional wheel). This just meets the more stable operation requirement of using the rear wheel 123 as the steering wheel and the front wheel 153 as the directional wheel when pushing in the reverse direction. Conversely, when the push rod rotates from the reverse position back to the forward position, the pushing arc surface 301 releases the crossbar 70, and the movable seat 71 moves upward under the action of the tenth return spring 17. At this time, the movable seat 71 tightens the front pull rope 72 and releases the rear pull rope 76. At this time, the front positioning pin 74 disengages from the front directional hole 73, and the rear positioning pin 78 engages with the rear directional hole 77. This conforms to the conventional and stable operation mode of pushing forward, where the front wheel 153 is the steering wheel and the rear wheel 123 is the directional wheel. This wheel directional component requires no additional operation from the user. It automatically switches the steering / directional roles of the front wheel 153 and the rear wheel 123 while the push rod assembly 3 changes direction, intelligently adapting to the best operation stability under different pushing modes, greatly improving the safety and ease of use of the trolley.

[0061] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A reversible stroller, characterized in that: Includes a rear leg (11), the lower end of which is provided with a rear wheel assembly (12), and the upper end of which is provided with a fixed seat (13). A front leg (14) rotatably connected to the fixed seat (13) about a first axis (E) is capable of unfolding or retracting relative to the rear leg (11). The lower end of the front leg (14) is provided with a front wheel assembly (15). A first locking mechanism (21) for locking the front leg (14) and the rear leg (11) in their relatively unfolded state is provided between them. The fixed seat (13) is rotatably connected to a front leg (14) capable of unfolding or retracting relative to the rear leg (11). A push rod assembly (3) is rotatably connected to the two axes (F). The push rod assembly (3) has two positions: a forward position for pushing the stroller forward and a reverse position for pushing the stroller backward after rotating relative to the fixed seat (13). When the push rod assembly (3) is in the forward position, its upper end is above the rear wheel assembly (12). When the push rod assembly (3) is in the reverse position, its upper end is above the front wheel assembly (15). The push rod assembly (3) is connected to the fixed seat. (13) is provided with a second locking mechanism (22) for locking it in the forward or reverse position. The position where the push rod assembly (3) stops also includes a folded position that can rotate and move closer to the rear leg (11) after the second locking mechanism (22) is unlocked. The upper end of the push rod assembly (3) is connected to an unlocking part (24) for unlocking the second locking mechanism (22). The inner side of the fixed base (13) is provided with a rotating cover (16) that can rotate relative to it. The rotating cover (16) is provided with a push rod that can be in the forward position when it rotates. The component (3) has an unlocking part (25) for unlocking. The rotating cover (16) is connected to a foldable support component (4) for carrying infants and young children. A third locking mechanism (23) is provided between the rotating cover (16) and the fixed base (13). The support component (4) is provided with a driving member (26) that can drive the third locking mechanism (23) to unlock when it is folded. The fixed base (13) is also provided with a linkage member (27) that can link the first locking mechanism (21) to unlock when the third locking mechanism (23) is unlocked.

2. The reversible stroller according to claim 1, characterized in that: The second locking mechanism (22) includes a locking member (221) slidably disposed within the push rod assembly (3). The fixed base (13) is provided with a forward locking position (222) and a reverse locking position (223) that can engage or disengage with the locking member (221). When the locking member (221) engages with the forward locking position (222), the push rod assembly (3) remains in the forward position. When the locking member (221) engages with the reverse locking position (223), the push rod assembly (3) remains in the reverse position. The unlocking member (24) includes a locking member movably disposed within the push rod assembly (3). The upper end of the unlocking block (241) is provided with a first pull rope (242) between the unlocking block (241) and the locking member (221) so that the locking member (221) can be pulled away from the forward locking position (222) or the reverse locking position (223) when the unlocking block (241) moves. The push rod assembly (3) is provided with a second return spring (243) between the push rod assembly (3) and the unlocking block (241) so as to push the unlocking block (241) to reset. The push rod assembly (3) is provided with an elastic element (224) between the push rod assembly (3) and the locking member (221) so as to push the locking member (221) to reset.

3. The reversible stroller according to claim 2, characterized in that: The unlocking part (25) includes an unlocking groove (252) provided on the rotating cover (16) and having an inclined groove wall (251). The locking member (221) is provided with a protrusion (225) that extends into the unlocking groove (252) and abuts against the inclined groove wall (251). When the rotating cover (16) rotates relative to the fixed seat (13), the inclined groove wall (251) pushes the protrusion (225) so that the locking member (221) slides away from the forward locking position (222).

4. The reversible stroller according to claim 1, characterized in that: The first locking mechanism (21) includes a locking position (211) provided on the fixed base (13). The upper end of the front leg (14) is provided with a locking block (212) that can engage or disengage from the locking position (211). The locking block (212) is connected to the linkage (27) and can be driven by the linkage (27) to disengage from the locking position (211). A first return spring (213) is provided between the locking block (212) and the front leg (14) that can push the locking block (212) to reset.

5. The reversible stroller according to claim 4, characterized in that: The linkage (27) includes a rotating rod (271) rotatably connected to the fixed base (13). One end of the rotating rod (271) is connected to the third locking mechanism (23). When the third locking mechanism (23) is unlocked, the rotating rod (271) is pushed by the moving third locking mechanism (23) and rotates relative to the fixed base (13). The other end of the rotating rod (271) is movably connected to a sliding block (272). When the rotating rod (271) rotates relative to the fixed base (13), the sliding block (272) is driven to slide relative to the fixed base (13). The sliding block (272) and the locking block (212) are engaged by an inclined plane so that when the sliding block (272) slides, it can push the locking block (212) to disengage from the locking position (211).

6. The reversible stroller according to claim 5, characterized in that: The third locking mechanism (23) includes a locking groove (231) on the rotating cover (16). A locking block (232) that can engage or disengage from the locking groove (231) is slidably provided in the fixed base (13). One end of the locking block (232) abuts against the rotating rod (271), and the other end abuts against the push block (233) provided in the rotating cover (16). The push block (233) abuts against the driving member (26). When the bearing assembly (4) is folded, the driving member (26) pushes the locking block (232) to move through the push block (233), thereby unlocking the third locking mechanism (23). A third return spring (234) that can push the locking block (232) to reset is provided between the locking block (232) and the fixed base (13).

7. The reversible stroller according to any one of claims 1 to 6, characterized in that: The supporting component (4) includes a connecting seat (41) that can be fixedly connected to the rotating cover (16). A seat part (42) and a backrest (43) that can be unfolded or folded relative to the seat part (42) are rotatably connected to the connecting seat (41). The connecting seat (41) is provided with a locking groove (441). A locking rod (442) that engages or disengages from the locking groove (441) is slidably provided in the backrest (43). A handle (443) is movably connected to the upper end of the backrest (43). A second pull rope (444) that can pull the locking rod (442) away from the locking groove (441) is provided between the handle (443) and the locking rod (442). A sixth return spring (445) that can push the locking rod (442) to return to its original position is also provided between the backrest (43) and the locking rod (442). The driving component (26) includes a component that is slidably disposed on the backrest (43) and the locking rod (442). The connecting seat (41) contains a drive block (261), on which a transverse column (262) is provided laterally. The backrest (43) is provided with a pusher (431) that can push the transverse column (262) to move the drive block (261) when it rotates and closes relative to the seat (42). The seat (42) is provided with a locking groove (451). The connecting seat (41) contains a locking block (452) that can engage with the locking groove (451). The backrest (43) is provided with a pusher (432) that engages with the inclined surface of the locking block (452) and can push the locking block (452) out of the locking groove (451) when the backrest (43) rotates and closes relative to the seat (42). A fourth return spring (453) is provided between the locking block (452) and the connecting seat (41) to push the locking block (452) back to its original position.

8. The reversible stroller according to claim 7, characterized in that: The connecting seat (41) includes an outer seat body (411) and an inner seat body (412) fixedly connected thereto. The outer seat body (411) is connected to the rotating cover (16). The locking block (452) and the driving member (26) are disposed inside the outer seat body (411). The backrest (43) and the seat part (42) are disposed between the outer seat body (411) and the inner seat body (412). The inner seat body (412) is also connected to an armrest (46) that can rotate and unfold or retract relative to it. 46) A slot (471) is provided on the upper part. The inner seat (412) is provided with a locking block (472) that can engage or disengage from the slot (471). The locking block (472) is connected to the engaging block (452). When the engaging block (452) disengages from the engaging slot (451), the engaging block (452) drives the locking block (472) to disengage from the slot (471). A fifth return spring (473) is provided between the locking block (472) and the inner seat (412) to push the locking block (472) to reset.

9. The reversible stroller according to claim 7, characterized in that: The connecting seat (41) and the rotating cover (16) are detachably connected so that the bearing assembly (4) can be connected to the fixed seat (13) in either a forward or reverse direction. The locking rod (442) is provided with a protruding shaft (481) protruding to one side. The seat part (42) is provided with a positioning groove (482) that allows the protruding shaft (481) to enter when the backrest (43) rotates and closes relative to it. The protruding shaft (481) is located in the positioning groove (482). When the seat (42) is in contact with the seat (42), the locking rod (442) remains disengaged from the locking groove (441). The seat (42) is also provided with a recessed groove (491). A moving block (492) is laterally slidably provided on one side of the backrest (43). The moving block (492) and the groove wall of the recessed groove (491) are engaged by abutting against each other through an inclined surface. When the backrest (43) rotates and closes relative to the seat (42), the groove wall of the recessed groove (491) pushes against the moving block. (492) Extends to the other side of the backrest (43) to a position where it can push the horizontal column (262). A seventh return spring (493) is provided between the moving block (492) and the backrest (43) to push the moving block (492) back to its original position. When the supporting assembly (4) is connected to the fixed seat (13) in the positive direction and the stroller needs to be folded, the seat part (42) and the backrest (43) rotate relative to the connecting seat (41) so that the moving block (492) pushes the horizontal column (262), thereby causing the drive block (261) to drive the third locking mechanism (23) to unlock. When the supporting assembly (4) is connected to the fixed seat (13) in the opposite direction and the stroller needs to be folded, the backrest (43) rotates relative to the seat part (42) so that the pushing part (431) pushes the horizontal column (262) to move, thereby causing the drive block (261) to drive the third locking mechanism (23) to unlock.

10. The reversible stroller according to claim 8, characterized in that: The connecting seat (41) is provided with a connecting groove (413) facing the opening. The rotating cover (16) is provided with a locking seat (161) that can be detachably connected to the connecting groove (413). The armrest (46) is connected with a connecting post (461) that passes through the backrest (43), the seat (42) and the connecting seat (41). A locking post (401) is slidably provided in the connecting post (461). The rotating cover (16) is provided with a locking hole (402) that can engage or disengage with the locking post (401). A third pull rope (403) that can disengage the locking post (401) from the locking hole (402) is connected to the locking post (401). An eleventh return spring (404) that can push the locking post (401) to return to its original position is provided in the connecting post (461).

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