Folding baby carriage with synchronous unlocking mechanism
Through the mechanical linkage design of the synchronous unlocking mechanism, the operation of adjusting the backrest angle and folding the seat of the stroller is simplified, which solves the problem of cumbersome operation in the existing technology, improves convenience and reduces costs.
Patent Information
- Application Number
- CN202520631745.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-04-07
AI Technical Summary
In existing stroller designs, adjusting the seat back angle and folding the seat require two separate buttons, which makes operation cumbersome and increases manufacturing costs and maintenance difficulty.
Employing a synchronous unlocking mechanism, through the mechanical linkage of the release and locking mechanisms, combined with the design of the locking, driving, and elastic components, the backrest assembly automatically releases the rotation restriction on the mounting base when folded, achieving synchronous unlocking and folding of the seat.
It simplifies the operation process, reduces production and maintenance costs, improves the ease of operation and the accuracy of actions, avoids the risk of misoperation, and ensures the stability and safety of the seat in use.
Smart Images
Figure CN223864932U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of baby strollers, and particularly relates to a folding baby stroller with a synchronous unlocking mechanism.
BACKGROUND
[0002] In the existing design of baby strollers, the adjustment of the backrest angle of the seat and the folding of the seat relative to the frame usually need to be operated by two independent buttons. This design makes the operation cumbersome, and the user needs to find and operate two different buttons, which may bring inconvenience in actual use. In addition, the existence of multiple buttons also increases the manufacturing cost and maintenance difficulty of the baby stroller.
SUMMARY OF THE UTILITY MODEL
[0003] In order to solve the problem that the adjustment of the backrest angle of the seat and the unlocking of the folding of the seat are realized by two independent buttons in the prior art, resulting in cumbersome operation, the present application provides a folding baby stroller with a synchronous unlocking mechanism.
[0004] The present application is realized by the following technical scheme:
[0005] A folding baby stroller with a synchronous unlocking mechanism, comprising a frame body, a seat assembly, a backrest assembly hinged to the seat assembly, a mounting seat rotatably connected to the frame body and connected to the seat assembly, and a release mechanism arranged in the backrest assembly, the release mechanism being used to limit the rotation of the mounting seat relative to the frame body, and when the backrest assembly is folded to the limit position in the direction of approaching the seat assembly, the release mechanism is used to release the limitation of the rotation of the mounting seat relative to the frame body.
[0006] The folding baby stroller with a synchronous unlocking mechanism as described above, the release mechanism comprises a lock piece slidingly arranged on the mounting seat, a driving piece slidingly arranged in the backrest assembly and abutting against the lock piece and cooperating with the first inclined surface of the backrest assembly, the mounting seat is provided with a first limiting groove for inserting the lock piece, the frame body is provided with a second limiting groove for inserting the lock piece, the lock piece is inserted into the first limiting groove and the second limiting groove at the same time to limit the rotation of the mounting seat relative to the frame body, and the lock piece is inserted into the first limiting groove and withdrawn from the second limiting groove to release the limitation of the rotation of the mounting seat relative to the frame body.
[0007] The folding baby stroller with a synchronous unlocking mechanism as described above, the backrest assembly is provided with a first inclined surface, the driving piece cooperates with the first inclined surface, the lock piece is provided with a protrusion for abutting against the driving piece, the mounting seat is provided with a displacement slot for moving the protrusion up and down, a first elastic piece is arranged between the lock piece and the mounting seat, and a second elastic piece is arranged in the backrest assembly to reset the driving piece.
[0008] A folding stroller with a synchronous unlocking mechanism as described above, when the backrest assembly is folded towards the seat assembly, the first inclined surface pushes the driving member to push the lock member to fully insert into the first limiting slot and withdraw from the second limiting slot, so as to release the restriction of the mounting seat relative to the frame body rotation; when the backrest assembly is unfolded away from the seat assembly, the lock member is reset under the elastic force of the first elastic member and the driving member is reset under the elastic force of the second elastic member, and the lock member is inserted into the first limiting slot and the second limiting slot at the same time to restrict the rotation of the mounting seat relative to the frame body.
[0009] A folding stroller with a synchronous unlocking mechanism as described above, the mounting seat is provided with a sliding groove for the sliding of the lock member, the first elastic member is arranged between the bottom of the lock member and the bottom of the sliding groove, and the lock member is inserted into the first limiting slot and the second limiting slot at the same time when the top of the lock member abuts against the top of the sliding groove.
[0010] A folding stroller with a synchronous unlocking mechanism as described above, further comprising a locking mechanism for limiting or releasing the angle adjustment of the backrest assembly relative to the seat assembly, the locking mechanism comprising an unlocking block, a gear coaxially connected with the seat assembly, a lock pin connected with the unlocking block through a pull wire and inserted into the gear at one end, a plurality of positioning holes are arranged on the gear for the insertion of the lock pin to keep the backrest assembly at the current angle and restrict the rotation of the backrest assembly relative to the seat assembly, and a third elastic member is arranged in the backrest assembly for driving the lock pin to insert into the positioning hole.
[0011] A folding stroller with a synchronous unlocking mechanism as described above, when the unlocking block is actuated, the lock pin is pulled away from the positioning hole through the pull wire to release the restriction of the rotation of the backrest assembly relative to the seat assembly, and at the same time the third elastic member is compressed under force to drive the lock pin to insert into the positioning hole to keep the backrest assembly at the current angle and restrict the rotation of the backrest assembly relative to the seat assembly.
[0012] A folding stroller with a synchronous unlocking mechanism as described above, further comprising a fence assembly hinged with the backrest assembly, the gear is provided with a third limiting slot, a limiting block matched with the inclined surface of the backrest assembly is slidably arranged in the third limiting slot, the fence assembly is provided with a fourth limiting slot matched with the third limiting slot for the sliding of the limiting block, the limiting block is inserted into the third limiting slot and the fourth limiting slot at the same time to restrict the rotation of the fence assembly relative to the backrest assembly, and the limiting block is inserted into the third limiting slot and withdrawn from the fourth limiting slot to release the restriction of the rotation of the fence assembly relative to the backrest assembly.
[0013] The folding stroller with the synchronous unlocking mechanism has a second slope on the backrest assembly, the limiting block is in slope cooperation with the second slope, and the fourth elastic member is arranged between the limiting block and the gear.
[0014] The folding stroller with the synchronous unlocking mechanism has the fifth elastic member arranged between the gear and the backrest assembly, and the fifth elastic member is used for driving the surrounding assembly to reset upward when the backrest assembly is unfolded in the direction away from the seat assembly.
[0015] Compared with the prior art, the application has the following advantages:
[0016] The folding stroller with the synchronous unlocking mechanism of the application releases the rotation restriction of the mounting seat by the release mechanism when the backrest assembly is folded to the limit position in the direction of the seat, and the user only needs to complete the folding action of the backrest assembly to synchronously complete the unlocking of the seat assembly, and then the seat is rotated downward and falls together with the backrest under the action of the weight to complete the folding. The originally separated key operation is integrated into the backrest movement track through the mechanical linkage principle, which eliminates the complexity of multiple key operations, improves the operation convenience, effectively reduces the production and maintenance cost, and ensures the accuracy and safety of the action execution through the limit position triggering mechanism, thereby avoiding the risk of misoperation. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.
[0018] Figure 1 is a three-dimensional view in the embodiment of the application;
[0019] Figure 2 is Figure 1 the exploded view of the release mechanism in Figure 1 ;
[0020] Figure 3 is Figure 1 the exploded view of the release mechanism in Figure 2 ;
[0021] Figure 4 is a side view of the unfolding locking in the embodiment of the application;
[0022] Figure 5 is a side view of the folding unlocking in the embodiment of the application;
[0023] Figure 6 is Figure 1a top view of
[0024] Figure 7 is Figure 6 a sectional view at A-A in
[0025] Figure 8 is Figure 6 a sectional view at B-B in DETAILED DESCRIPTION
[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.
[0027] Please refer to Figures 1 to 8 A folding stroller with a synchronous unlocking mechanism, comprising a frame body 1, a seat assembly 2, a backrest assembly 3 hinged to the seat assembly 2, a mounting seat 4 rotatably connected to the frame body 1 and provided with the seat assembly 2, and a release mechanism 5 arranged in the backrest assembly 3, the release mechanism 5 is used to limit the rotation of the mounting seat 4 relative to the frame body 1, and when the backrest assembly 3 is folded to the limit position in the direction of approaching the seat assembly 2, the release mechanism 5 is used to release the rotation limitation of the mounting seat 4 relative to the frame body 1.
[0028] The folding stroller with a synchronous unlocking mechanism of the present application, when the backrest assembly is folded to the limit position in the direction of the seat, the release mechanism synchronously releases the rotation limitation of the mounting seat, and the user only needs to complete the folding action of the backrest assembly to synchronously complete the unlocking of the seat assembly, and then the seat together with the backrest is rotated downward under the action of gravity to complete the folding. Through the mechanical linkage principle, the originally separated key operation is integrated into the backrest movement track, which not only eliminates the complexity brought by multiple key operations, but also effectively reduces the production and maintenance cost while improving the operation convenience, and the limit position triggering mechanism ensures the accuracy and safety of the action execution, avoiding the risk of misoperation.
[0029] Further, as a preferred embodiment of the present application but not as a limitation, the release mechanism 5 comprises a lock piece 51 slidingly arranged on the mounting seat 4, a driving piece 52 slidingly arranged in the backrest assembly 3 and abutting against the lock piece 51 and being in inclined surface cooperation with the backrest assembly 3, the mounting seat 4 is provided with a first limiting slot 41 for the lock piece 51 to be inserted, the frame body 1 is provided with a second limiting slot 11 for the lock piece 51 to be inserted, the lock piece 51 is inserted into the first limiting slot 41 and the second limiting slot 11 at the same time to limit the rotation of the mounting seat 4 relative to the frame body 1, and the lock piece 51 is inserted into the first limiting slot 41 and separated from the second limiting slot 11 to release the rotation limitation of the mounting seat 4 relative to the frame body 1.
[0030] In the present embodiment, through the cooperation of the lock piece 51 and the driving piece 52, when the backrest assembly 3 is folded to the limit position towards the seat assembly 2, the first inclined surface 31 on the backrest assembly 3 will push the driving piece 52, and then push the lock piece 51 to be completely inserted into the first limiting slot 41 on the mounting seat 4 and separated from the second limiting slot 11 on the frame body 1 at the same time, so as to release the rotation limitation of the mounting seat 4 relative to the frame body 1, at this time the seat can be directly rotated and fallen under the action of its own gravity to complete the folding of the seat assembly. Conversely, when the backrest assembly 3 is unfolded, the lock piece 51 is reset under the action of the first elastic piece 53, and is re-inserted into the first limiting slot 41 and the second limiting slot 11 at the same time, so as to restore the rotation limitation of the mounting seat 4, and ensure the stability of the seat in the use state. Not only the operation process is simplified and the tediousness of multi-key operation is eliminated, but also the production cost and maintenance difficulty are effectively reduced by reducing the number of parts of the independent locking mechanism.
[0031] Further, as a preferred embodiment of the present application but not as a limitation, the backrest assembly 3 is provided with a first inclined surface 31, the driving piece 52 is in inclined surface cooperation with the first inclined surface 31, the lock piece 51 is provided with a protrusion 511 abutting against the driving piece 52, the mounting seat 4 is provided with a displacement slot 42 through which the protrusion 511 moves up and down, the first elastic piece 53 is arranged between the lock piece 51 and the mounting seat 4, and the second elastic piece 54 is arranged in the backrest assembly 3 to reset the driving piece 52.
[0032] When the backrest assembly 3 is folded towards the seat assembly 2, the first inclined surface 31 pushes the driving member 52 to slide along the inclined surface and push the protrusion 511 on the lock member 51. The protrusion 511 moves up and down in the clearance slot 42, so that the lock member 51 is completely inserted into the first limiting slot 41 of the mounting seat 4 and separated from the second limiting slot 11 of the vehicle frame body 1, thereby releasing the rotation restriction of the mounting seat 4 and realizing the folding of the seat. The first and second elastic members are springs, the first elastic member 53 is compressed and stores energy for resetting. When the backrest assembly 3 is unfolded, the second elastic member 54 releases energy to push the driving member 52 to reset, and at the same time, the first elastic member 53 also releases energy to make the lock member 51 re-inserted into the first limiting slot 41 and the second limiting slot 11, thereby restoring the rotation restriction of the mounting seat 4 and ensuring the stability of the seat in use.
[0033] Further, as a preferred embodiment of the present scheme but not limited, when the backrest assembly 3 is folded towards the seat assembly 2, the first inclined surface 31 pushes the driving member 52 to push the lock member 51 to be completely inserted into the first limiting slot 41 and separated from the second limiting slot 11, so as to release the rotation restriction of the mounting seat 4 relative to the vehicle frame body 1; when the backrest assembly 3 is unfolded away from the seat assembly 2, the lock member 51 is reset under the elastic force of the first elastic member 53 and the driving member 52 under the elastic force of the second elastic member 54, and the lock member 51 is inserted into the first limiting slot 41 and the second limiting slot 11 at the same time to restrict the rotation of the mounting seat 4 relative to the vehicle frame body 1.
[0034] Further, as a preferred embodiment of the present scheme but not limited, the mounting seat 4 is provided with a sliding groove 43 for the sliding of the lock member 51, and the first elastic member 53 is arranged between the bottom of the lock member 51 and the bottom of the sliding groove 43. When the top of the lock member 51 abuts against the top of the sliding groove 43, the lock member 51 is inserted into the first limiting slot 41 and the second limiting slot 11 at the same time.
[0035] The sliding groove 43 in the mounting seat 4 provides a precise and stable sliding path for the lock piece 51, ensuring that it moves accurately and smoothly during folding and unfolding. The first elastic member 53 is arranged between the bottom of the lock piece 51 and the bottom of the sliding groove 43, serving as a reset and buffer. When the backrest assembly 3 is folded, the driving piece 52 pushes the lock piece 51 to move downward, and the first elastic member 53 is compressed, storing energy. The lock piece 51 can be inserted into the first limiting groove 41 of the mounting seat 4 and the second limiting groove 11 of the frame main body 1, thereby releasing the rotation restriction of the mounting seat 4. When the backrest assembly 3 is unfolded, the first elastic member 53 releases energy and pushes the lock piece 51 to reset. At this time, the top of the lock piece 51 will abut against the top of the sliding groove 43, causing it to be re-inserted into the two limiting grooves and restoring the rotation restriction of the mounting seat 4.
[0036] Further, as a preferred embodiment of the present scheme but not limited, it further includes a locking mechanism 6 for restricting or releasing the angle adjustment of the backrest assembly 3 relative to the seat assembly 2. The locking mechanism 6 includes an unlocking block 61, a gear 62 coaxially connected with the seat assembly 2, a lock pin 64 connected with the unlocking block 61 through a pull wire 63 and inserted into the gear 62 at one end, and a plurality of positioning holes 621 on the gear 62 for the lock pin 64 to be inserted to keep the backrest assembly 3 at the current angle and restrict the rotation of the backrest assembly 3 relative to the seat assembly 2. The backrest assembly 3 is provided with a third elastic member 65 for driving the lock pin 64 to be inserted into the positioning hole 621.
[0037] In the present embodiment, when the user pulls the unlocking block 61, the pull wire 63 pulls the lock pin 64 out of the positioning hole 621, thereby releasing the rotation restriction of the backrest assembly 3 and allowing it to be freely adjusted in angle. The third elastic member is a spring, and the third elastic member 65 is compressed, storing energy. When the user releases the unlocking block 61, the third elastic member 65 releases energy and pushes the lock pin 64 to be re-inserted into the positioning hole 621, locking the backrest assembly 3 at the current angle and ensuring its stability and safety. A convenient angle adjustment mode is provided, and the stability of the backrest assembly 3 during use is ensured through mechanical locking, preventing angle changes caused by accidental collisions or shaking. The plurality of positioning holes 621 allows the user to adjust the backrest assembly 3 to multiple preset angles as needed, meeting the needs of children of different age groups or different use scenarios.
[0038] Further, as a preferred embodiment of the present application but not as a limitation, when the unlocking block 61 is pulled, the lock pin 64 is pulled out of the positioning hole 621 by the pull wire 63 to release the restriction of the backrest assembly 3 relative to the seat assembly 2, while the third elastic member 65 is compressed to drive the lock pin 64 to insert into the positioning hole 621 to keep the backrest assembly 3 at the current angle and restrict the rotation of the backrest assembly 3 relative to the seat assembly 2.
[0039] Further, as a preferred embodiment of the present application but not as a limitation, the application further comprises a surrounding assembly 7 hinged to the backrest assembly 3, the gear 62 is provided with a third limiting groove 622, and a limiting block 71 is slidingly arranged in the third limiting groove 622 and matched with the inclined surface of the backrest assembly 3, the surrounding assembly 7 is provided with a fourth limiting groove 72 matched with the third limiting groove 622 for sliding of the limiting block 71, the limiting block 71 is inserted into the third limiting groove 622 and the fourth limiting groove 72 to restrict the rotation of the surrounding assembly 7 relative to the backrest assembly 3, and the limiting block 71 is inserted into the third limiting groove 622 and separated from the fourth limiting groove 72 to release the restriction of the rotation of the surrounding assembly 7 relative to the backrest assembly 3.
[0040] In the present embodiment, the limiting block 71 is slidingly arranged in the third limiting groove 622 and matched with the inclined surface of the backrest assembly 3. When the backrest assembly 3 is folded, the inclined surface will push the limiting block 71 to separate from the fourth limiting groove 72, thereby releasing the restriction of the rotation of the surrounding assembly 7 relative to the backrest assembly 3, allowing the surrounding assembly 7 to be folded together with the backrest assembly 3 to realize compact storage of the stroller. Conversely, when the backrest assembly 3 is unfolded, the limiting block 71 is reset under the action of the elastic member and inserted into the third limiting groove 622 and the fourth limiting groove 72 to restrict the rotation of the surrounding assembly 7, ensuring the stability and safety of the surrounding assembly 7 in the use state. Not only the folding convenience of the stroller is improved, but also the stability of the surrounding assembly 7 in the unfolded state is ensured through mechanical linkage.
[0041] Further, as a preferred embodiment of the present application but not as a limitation, the backrest assembly 3 is provided with a second inclined surface 32, the limiting block 71 is matched with the second inclined surface 32, and a fourth elastic member 73 is arranged between the limiting block 71 and the gear 62.
[0042] In this embodiment, when the backrest assembly 3 folds towards the seat assembly 2, the second inclined surface 32 pushes against the limiting block 71, causing it to slide along the inclined surface and be pulled out of the fourth limiting groove 72 of the barrier assembly 7. This action removes the restriction on the rotation of the barrier assembly 7 relative to the backrest assembly 3, allowing the barrier assembly 7 to fold together with the backrest assembly 3, achieving compact storage of the stroller. During this process, the fourth elastic element is a spring, and the fourth elastic element 73 is compressed to store energy for reset. When the backrest assembly 3 unfolds, the fourth elastic element 73 releases energy, pushing the limiting block 71 to reset, causing it to re-insert into both the third limiting groove 622 of the gear 62 and the fourth limiting groove 72 of the barrier assembly 7, thereby limiting the rotation of the barrier assembly 7 and ensuring its stability and safety in use. This not only simplifies the folding and unfolding operation of the barrier assembly 7 but also ensures the accuracy and consistency of the action through the mechanical linkage principle, avoiding barrier locking failure due to improper operation. The second inclined surface 32 cooperates with the inclined plate of the limiting block 71, so that the locking and unlocking actions of the enclosure component 7 can be carried out automatically as the backrest component 3 is folded and unfolded, without the need for additional manual operation, thus improving the convenience of use.
[0043] Furthermore, as a preferred embodiment of this solution and not a limitation, a fifth elastic element 74 is provided between the gear 62 and the backrest assembly 3. The fifth elastic element 74 is used to drive the barrier assembly 7 to return to its original position upward when the backrest assembly 3 is unfolded in a direction away from the seat assembly 2.
[0044] In this embodiment, when the backrest assembly 3 is closed, the barrier assembly 7 also closes. During this process, the fifth elastic element 74 is a tension spring, which is compressed to store energy. When the backrest assembly 3 is unfolded, the fifth elastic element 74 releases the stored energy, pushing the gear 62 and the connected barrier assembly 7 upwards, allowing the barrier assembly 7 to quickly and accurately return to its usable state. Without the fifth elastic element, the barrier assembly needs to be manually lifted upwards to reset; with the fifth elastic element, the barrier assembly can automatically reset when the backrest assembly is opened, improving ease of use.
[0045] Furthermore, as a preferred embodiment of this solution and not a limitation, when the backrest assembly 3 folds towards the seat assembly 2, the second inclined surface 32 pushes the limiting block 71 into the third limiting groove 622 and pulls it out of the fourth limiting groove 72 to release the restriction on the rotation of the barrier assembly 7 relative to the backrest assembly 3; when the backrest assembly 3 unfolds away from the seat assembly 2, the limiting block 71 is reset under the elastic force of the fourth elastic member 73, and the limiting block 71 is simultaneously inserted into the third limiting groove 622 and the fourth limiting groove 72 to restrict the rotation of the barrier assembly 7 relative to the backrest assembly 3.
[0046] The working principle of this embodiment is as follows:
[0047] This application discloses a folding stroller with a synchronous unlocking mechanism. When the backrest assembly is folded to its limit position towards the seat, the unlocking mechanism simultaneously releases the rotation restriction on the mounting base. The user only needs to complete the folding action of the backrest assembly to simultaneously unlock the seat assembly. Subsequently, the seat and backrest, under their own weight, rotate downwards and fall to complete the folding. By integrating the originally separate button operations into the backrest movement trajectory through the mechanical linkage principle, the cumbersome operation caused by multiple buttons is eliminated. This improves the convenience of operation while effectively reducing production and maintenance costs. Furthermore, the limit position triggering mechanism ensures the accuracy and safety of the action execution, avoiding the risk of misoperation.
[0048] The above are implementation methods provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.
Claims
1. A folding stroller with a synchronous unlocking mechanism, characterized in that, The vehicle includes a frame body (1), a seat assembly (2), a backrest assembly (3) hinged to the seat assembly (2), a mounting seat (4) rotatably connected to the frame body (1) and connected to the seat assembly (2), and a release mechanism (5) provided in the backrest assembly (3). The release mechanism (5) is used to restrict the rotation of the mounting seat (4) relative to the frame body (1) and to release the restriction on the rotation of the mounting seat (4) relative to the frame body (1) when the backrest assembly (3) is folded to its limit position towards the seat assembly (2).
2. A folding stroller with a synchronous unlocking mechanism according to claim 1, characterized in that, The unlocking mechanism (5) includes a lock (51) slidably disposed on the mounting base (4), and a drive (52) slidably disposed in the backrest assembly (3) and abutting against the lock (51) and obliquely cooperating with the backrest assembly (3). The mounting base (4) is provided with a first limiting groove (41) for the lock (51) to be inserted, and the frame body (1) is provided with a second limiting groove (11) for the lock (51) to be inserted. The lock (51) is simultaneously inserted into the first limiting groove (41) and the second limiting groove (11) to restrict the mounting base (4) from rotating relative to the frame body (1). The lock (51) is inserted into the first limiting groove (41) and withdrawn from the second limiting groove (11) to release the restriction on the mounting base (4) from rotating relative to the frame body (1).
3. A folding stroller with a synchronous unlocking mechanism according to claim 2, characterized in that, The backrest assembly (3) is provided with a first inclined surface (31), the drive member (52) is inclined to cooperate with the first inclined surface (31), the lock member (51) is provided with a protrusion (511) for the drive member (52) to abut, the mounting base (4) is provided with a clearance groove (42) for the protrusion (511) to pass through and move up and down, a first elastic member (53) is provided between the lock member (51) and the mounting base (4), and a second elastic member (54) is provided inside the backrest assembly (3) to drive the drive member (52) to reset.
4. A folding stroller with a synchronous unlocking mechanism according to claim 3, characterized in that, When the backrest assembly (3) folds towards the seat assembly (2), the first inclined surface (31) pushes the drive member (52) to push the lock member (51) to fully insert into the first limiting groove (41) and withdraw from the second limiting groove (11), thereby releasing the restriction on the mounting seat (4) to rotate relative to the frame body (1); when the backrest assembly (3) unfolds away from the seat assembly (2), the lock member (51) is reset under the elastic force of the first elastic member (53) and the drive member (52) is reset under the elastic force of the second elastic member (54), and the lock member (51) is simultaneously inserted into the first limiting groove (41) and the second limiting groove (11) to restrict the mounting seat (4) from rotating relative to the frame body (1).
5. A folding stroller with a synchronous unlocking mechanism according to claim 3, characterized in that, The mounting base (4) is provided with a sliding groove (43) for the lock (51) to slide. The bottom of the lock (51) and the bottom of the sliding groove (43) are provided with the first elastic member (53). When the top of the lock (51) abuts against the top of the sliding groove (43), the lock (51) is simultaneously inserted into the first limiting groove (41) and the second limiting groove (11).
6. A folding stroller with a synchronous unlocking mechanism according to claim 1, characterized in that, It also includes a locking mechanism (6) for restricting or releasing the angle adjustment of the backrest assembly (3) relative to the seat assembly (2). The locking mechanism (6) includes an unlocking block (61), a gear (62) coaxially connected to the seat assembly (2), and a locking pin (64) connected to the unlocking block (61) via a pull wire (63) and inserted into the gear (62) at one end. The gear (62) is provided with a plurality of positioning holes (621) for the locking pin (64) to be inserted to hold the backrest assembly (3) at the current angle and restrict the rotation of the backrest assembly (3) relative to the seat assembly (2). The backrest assembly (3) is provided with a third elastic element (65) for driving the locking pin (64) to be inserted into the positioning hole (621).
7. A folding stroller with a synchronous unlocking mechanism according to claim 6, characterized in that, When the unlocking block (61) is moved, the locking pin (64) is pulled away from the positioning hole (621) by the pull wire (63) to release the restriction on the rotation of the backrest assembly (3) relative to the seat assembly (2). At the same time, the third elastic element (65) is compressed, driving the locking pin (64) to insert into the positioning hole (621) to keep the backrest assembly (3) at the current angle and restrict the rotation of the backrest assembly (3) relative to the seat assembly (2).
8. A folding stroller with a synchronous unlocking mechanism according to claim 6, characterized in that, It also includes a barrier assembly (7) hinged to the backrest assembly (3). The gear (62) is provided with a third limiting groove (622). A limiting block (71) that is inclined and cooperates with the backrest assembly (3) is slidably provided in the third limiting groove (622). The barrier assembly (7) is provided with a fourth limiting groove (72) that cooperates with the third limiting groove (622) to allow the limiting block (71) to slide. The limiting block (71) is inserted into the third limiting groove (622) and the fourth limiting groove (72) at the same time to restrict the barrier assembly (7) from rotating relative to the backrest assembly (3). The limiting block (71) is inserted into the third limiting groove (622) and withdrawn from the fourth limiting groove (72) to release the restriction on the barrier assembly (7) from rotating relative to the backrest assembly (3).
9. A folding stroller with a synchronous unlocking mechanism according to claim 8, characterized in that, The backrest assembly (3) is provided with a second inclined surface (32), the limiting block (71) is inclined to cooperate with the second inclined surface (32), and a fourth elastic element (73) is provided between the limiting block (71) and the gear (62).
10. A folding stroller with a synchronous unlocking mechanism according to claim 9, characterized in that, A fifth elastic element (74) is provided between the gear (62) and the backrest assembly (3). The fifth elastic element (74) is used to drive the enclosure assembly (7) to return to its original position upward when the backrest assembly (3) unfolds in a direction away from the seat assembly (2).