A stroller

Abstract

The embodiment of the application provides a baby carriage, and relates to the technical field of baby carriages. The baby carriage comprises a frame and a seat installed on the frame. The frame is locked in an unfolded state by a locking mechanism. The locking mechanism comprises a locking groove arranged on a push handle and a locking block arranged on a base. The seat bottom is provided with at least one protruding part. When the seat is rotated from the unfolded position to the folding direction relative to the frame, the protruding part contacts and applies a driving force to the locking block, so that the locking block is separated from the locking groove, thereby linkage unlocking of the frame during folding of the seat is realized, and one-step folding operation is achieved. The end of the protruding part is provided with an abutting inclined surface, so that the seat can avoid the locking block when being turned back to unfold from the folded state, and mislocking is prevented. The seat can be installed in a forward direction or a reverse direction, the locking block is driven by different protruding parts, and the generality is high. The application simplifies the operation steps, and improves the convenience and safety.

Description

Technical Field

[0001] This application relates to the field of children's vehicle technology, specifically to a children's vehicle that unlocks and folds by linking the seat folding action with the frame, and its seat linkage folding and unlocking structure. Background Technology

[0002] Currently, most children's strollers on the market consist of a frame and a seat or base mounted on the frame. The frame usually has a folding mechanism, and the seat itself may also have a folding structure. Existing folding methods typically require the user to operate the folding mechanism on the frame and the folding or unlocking mechanism on the seat separately, which involves multiple steps, is difficult to complete with one hand, and is inconvenient to use.

[0003] On the other hand, in order to meet the needs of children of different ages and different usage scenarios, the seat often needs to be able to be installed on the frame in either forward or reverse orientation. However, in the existing technology, even if forward and reverse installation is provided, the frame folding and unlocking structure usually has no direct linkage with the seat folding action, or only achieves limited linkage in a single installation direction. This results in a complex structure, insufficient reliability, and high manufacturing cost.

[0004] Furthermore, some linkage mechanisms pose a risk of accidentally unlocking the frame during the stroller's unfolding process. For example, when the user returns the seat from a folded state to an unfolded state, the linkage may push the locking block on the frame again, causing the frame to unlock unexpectedly, posing a safety hazard. Therefore, there is an urgent need for a stroller and its seat linkage folding and unlocking mechanism that is simple in structure, allows for one-step folding, accommodates both forward and reverse installation, and does not mistakenly lock the frame during unfolding. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this application optimizes the seat structure and the mechanical cooperation between the seat and the frame, so that users can activate the locking block on the frame while folding the seat, realizing a one-step folding and unlocking operation of the frame, thereby simplifying the operation steps and improving the convenience of use.

[0006] The children's stroller provided in this application adopts the following technical solution:

[0007] A stroller includes a frame, the frame including a base connected to wheels and a push handle connected to the base for easy pushing, the push handle being locked to the base in the unfolded state by a locking mechanism provided on the frame;

[0008] A seat is mounted on the frame. The seat includes a fixed base, a seat plate, a front armrest, a backrest, and a cover. The fixed base and the cover are fixedly connected to form a locking seat with a slot. The seat plate is locked to the fixed base by a first locking mechanism. The front armrest is locked to the fixed base by a second locking mechanism. The backrest is locked to the front armrest and / or the cover by at least one third locking mechanism. The seat can rotate relative to the frame from the unfolded position to the folding direction when it is unlocked.

[0009] The locking mechanism includes a locking groove disposed on the pusher and a locking block disposed on the base. The locking block engages with the locking groove in the locked position to lock the frame in the unfolded state.

[0010] At least one protruding component is provided at the bottom of the seat. The protruding component is arranged to contact the locking block and apply a driving force to the locking block when the seat rotates relative to the frame from the unfolded position to the folding direction, so as to disengage the locking block from the locking groove and release the frame from locking. Thus, the frame is converted from unfolded state to folded state in conjunction with the folding process of the seat.

[0011] Furthermore, a foot pedal is connected to the front side of the seat plate, and a first unlocking handle is provided on the foot pedal. The first locking mechanism includes a first locking block that is slidably disposed in the seat plate. A first locking groove is provided on the fixed base. The first locking block is inserted into the first locking groove. A first connecting member is provided in the seat plate to connect the first unlocking handle and the first locking block. The first unlocking handle acts on the first connecting member to drive the first locking block out of the first locking groove.

[0012] Furthermore, the second locking mechanism includes a second locking block slidably disposed within the fixed seat, a second locking groove is provided on the armrest, a spring is provided in the fixed seat to push the second locking block into the second locking groove, and a guide surface is provided on one side of the inner wall of the second locking groove. When the seat plate rotates upward and / or the backrest folds forward, the second locking block is pushed towards the fixed seat under the action of the guide surface, thereby unlocking the seat.

[0013] Furthermore, the third locking mechanism includes a third locking block slidably disposed in the backrest. Both the fixed base and the pressure cover are provided with a third locking groove. The third locking block is simultaneously engaged with the third locking grooves provided in both the fixed base and the pressure cover. The backrest is provided with a second connecting member that connects the second unlocking handle and the third locking block. The second unlocking handle acts on the second connecting member to drive the third locking block out of the third locking groove.

[0014] Furthermore, the first and second connectors are unlocking links and / or flexible cables, used to disengage the corresponding first and second locking blocks from the corresponding first and third locking slots when the first and second locking blocks are pulled.

[0015] Furthermore, the protruding component includes a first protruding component and a second protruding component. The first and second protruding components include a protrusion. A sliding groove is formed on the protrusion. A sliding block is slidably disposed in the sliding groove. A spring connected to the sliding block is disposed in the sliding groove. During rotation, the sliding block contacts the locking block and pushes the locking block downward. At the same time, the spring compensates for wear. The surface of the sliding block is provided with a self-lubricating coating. A wear indicator is integrated in the sliding groove. The wear indicator is configured to provide visual or tactile feedback when the spring compression exceeds a preset threshold.

[0016] Furthermore, the protruding component has an abutment groove, the locking seat has an abutment member, and the sliding block has an integrally formed abutment protrusion. When the seat plate and the backrest are closed, there is a certain damping to prevent the hand from being pinched. During the closing process, the sliding block is driven to move by the abutment protrusion, thereby closing the block and initially locking it by the other side of the abutment protrusion.

[0017] Furthermore, the seat can be installed on the frame in either the forward or reverse direction. The protrusion has an arc-shaped inclined surface. The locking block can slide along the guide groove on the frame to reciprocate between the locked and unlocked positions. The base is provided with a reset elastic element. Under the action of the reset elastic element, the locking block moves toward the locked position. When the seat is installed in the forward direction, the arc-shaped inclined surface of the protrusion on the first protruding component drives the locking block to disengage from the locking groove. When the seat is installed in the reverse direction, the arc-shaped inclined surface of the protrusion on the second protruding component drives the locking block to disengage from the locking groove.

[0018] Furthermore, the end of the protrusion is provided with an abutting slope that cooperates with the locking block, so that when the seat rotates from the folded state to the unfolded state, the protruding part slides along the abutting slope to avoid the locking block when it contacts the locking block, so as to avoid unlocking the frame again during the unfolding process.

[0019] Furthermore, both the first locking block and the second locking block include two locking sub-blocks. The connecting member includes a first connecting member and a second connecting member that respectively connect the two locking sub-blocks. The first connecting member and the second connecting member are detachably connected. One of the first connecting member or the second connecting member is connected to the corresponding first or second unlocking handle. During operation, the first connecting member and the second connecting member must be connected first and then the corresponding first or second unlocking handle must be used to unlock the device to avoid accidental activation.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] Achieving a one-step folding operation greatly enhances ease of use: By optimizing the mechanical cooperation between the raised component at the bottom of the seat and the frame locking block, the frame locking block can be simultaneously disengaged from the locking slot during the single action of folding the seat, thus unlocking the frame. This eliminates the cumbersome steps of operating two separate unlocking mechanisms for the seat and frame in traditional designs, achieving true one-step folding. The operation is simple and quick, especially convenient for users to operate with one hand.

[0022] Effectively prevents frame mis-locking during unfolding, ensuring high safety: The specific abutment slope at the end of the protruding component (protrusion) ensures that when the seat rotates from the folded to the unfolded state, the protruding component slides along the slope and avoids the lock block after contacting it, without applying any driving force in the unlocking direction to the lock block. This design fundamentally avoids the risk of accidentally triggering frame unlocking during seat unfolding, eliminating safety hazards and improving product safety and reliability.

[0023] Compatible with both forward and reverse seat installation, offering enhanced versatility and adaptability: By designing two raised components (first and second raised components) and optimizing their interaction with the locking block, the locking block can be reliably driven by the corresponding raised components when the seat is folded, regardless of whether the seat is installed forward or backward on the frame, thus achieving frame-linked unlocking. This enhances the product's adaptability to different usage scenarios (such as children facing the push handle or the direction of travel) and the needs of children of different ages, without requiring changes to the core linkage structure.

[0024] The linkage structure is reliable, durable, and fault-tolerant: the protruding component employs a combination of a sliding block and a spring, allowing the spring's deformation to compensate for manufacturing tolerances or wear caused by long-term use when the locking block is pushed, ensuring effective transmission of driving force. The self-lubricating coating on the sliding block surface reduces frictional loss, while the integrated wear indicator provides an early warning when the spring compression exceeds a threshold, facilitating user maintenance and extending the service life and reliability of the linkage mechanism.

[0025] The base itself has a well-designed folding mechanism and incorporates safety features:

[0026] The seat, front armrest, and backrest are all equipped with independent locking mechanisms. Folding can be automatically triggered by pulling the handle or using the guide surface, making it a fully functional device.

[0027] When the seat and backrest are closed, the abutment structure generates damping, which can effectively prevent the risk of fingers being pinched due to rapid closing, reflecting meticulous consideration for children's safety.

[0028] The ingenious structural design and high integration facilitate cost control: the trigger mechanism for unlocking the frame folding is integrated into the regular folding action of the seat, eliminating the need for additional complex mechanisms or user operation points on the frame. This design, which utilizes existing motion and space for functional integration, achieves powerful functionality while simplifying the overall structure, reducing the number of parts, and lowering production and assembly costs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0030] Figure 2 This is a schematic diagram of the overall structure of the sitting posture and pushing hands.

[0031] Figure 3 This is a schematic diagram of the overall structure of the base.

[0032] Figure 4 This diagram illustrates the connection structure of the bump.

[0033] Figure 5 A schematic diagram illustrating the structure of the third locking mechanism.

[0034] Figure 6 This diagram illustrates the connection structure of the slider.

[0035] Explanation of reference numerals in the attached drawings: 1. Base; 2. Push handle; 3. Seat base; 4. Fixed seat; 5. Seat plate; 6. Front armrest; 7. Backrest; 8. Pressure cover; 9. Locking block; 10. Protruding component; 11. First locking block; 12. First locking groove; 13. Foot pedal; 14. First unlocking handle; 15. Second locking block; 16. Second locking groove; 17. Guide surface; 18. Third locking block; 19. Third locking groove; 20. Second unlocking handle; 22. Protrusion; 23. Sliding groove; 24. Sliding block; 25. Curved slope; 26. Abutting protrusion; 27. Abutting slope. Detailed Implementation

[0036] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two. The term “and / or” is used to describe the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can indicate: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0037] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0038] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0039] This application discloses a children's stroller, as shown in the embodiments below. Figure 1 , Figure 2 and Figure 3 The vehicle includes a frame, which includes a base 1 and a push handle 2 rotatably connected to the base 1. The base 1 is connected to rollers for easy movement. A locking mechanism is provided between the push handle 2 and the base 1, and the push handle 2 is locked in the unfolded state by the locking mechanism. The vehicle also includes a seat 3, which is installed on the base 1. The seat 3 includes a fixed base 4, a seat plate 5, a front armrest 6, a backrest 7, and a pressure cover 8. The fixed base 4 and the pressure cover 8 are fixedly connected to form a locking seat with a slot. The seat plate 5 is provided with a first locking mechanism and is locked to the fixed base 4 by the first locking mechanism. The front armrest 6 is provided with a second locking mechanism and is locked to the fixed base 4 by the second locking mechanism. The backrest 7 is locked to the front armrest 6 and / or the pressure cover 8 by at least one third locking mechanism.

[0040] Reference Figure 2 , Figure 3 and Figure 4The seat 3 can rotate relative to the frame from the unfolded position to the folding direction when it is unlocked. The locking mechanism includes a locking groove on the push handle 2 and a locking block 9 on the base 1. The locking block 9 engages with the locking groove in the locked position to lock the frame in the unfolded position. At least one protruding part 10 is provided at the bottom of the seat 3. The protruding part 10 is arranged such that when the seat 3 rotates relative to the frame from the unfolded position to the folding direction, the protruding part 10 contacts the locking block 9 and activates the movement of the locking block 9, causing the locking block 9 to disengage from the locking groove, thereby releasing the frame from locking. The frame is switched from the unfolded state to the folded state in conjunction with the folding of the seat 3.

[0041] Reference Figure 2 , Figure 3 and Figure 4 A foot pedal 13 is connected to the front side of the seat plate 5. A first unlocking handle 14 is provided on the foot pedal 13. The first locking mechanism includes a first locking block 11 that is slidably disposed in the seat plate 5. A first locking groove 12 is provided on the fixed base 4. The first locking block 11 is inserted into the first locking groove 12. A first connecting member is provided in the seat plate 5 to connect the first unlocking handle 14 and the first locking block 11. The first unlocking handle 14 acts on the first connecting member to drive the first locking block 11 to disengage from the first locking groove 12.

[0042] Reference Figure 3 , Figure 4 and Figure 5 The second locking mechanism includes a second locking block 15 slidably disposed in the fixed seat 4, a second locking groove 16 provided on the armrest, a spring provided in the fixed seat 4 to push the second locking block 15 into the second locking groove 16, and a guide surface 17 provided on one side of the inner wall of the second locking groove 16. When the seat plate 5 rotates upward and / or the backrest 7 folds forward, the second locking block 15 is pushed towards the fixed seat 4 under the action of the guide surface 17, thereby unlocking.

[0043] Reference Figure 3 , Figure 4 and Figure 5 The third locking mechanism includes a third locking block 18 slidably disposed within the backrest 7. Both the fixed base 4 and the pressure cover 8 have third locking grooves 19. The third locking block 18 simultaneously engages with the third locking grooves 19 on both the fixed base 4 and the pressure cover 8. A second connecting member is provided within the backrest 7, connecting the second unlocking handle 20 and the third locking block 18. The second unlocking handle 20 acts on the second connecting member, thereby causing the third locking block 18 to disengage from the third locking groove 19. The first and second connecting members are unlocking linkages and / or flexible cables, used to pull the corresponding first locking block 11 and second locking block 15 away from the corresponding first locking groove 12 and third locking groove 19.

[0044] Reference Figure 4 , Figure 5 and Figure 6 The protruding component 10 includes a first protruding component and a second protruding component, which are symmetrically arranged. Both protrusions include a protrusion 22, and a sliding groove 23 is provided on the protrusion 22. A sliding block 24 is slidably arranged in the sliding groove 23. A spring is provided in the sliding groove 23 to connect the sliding block 24. During rotation, the sliding block 24 contacts the locking block 9 and pushes the locking block 9 downward. At the same time, the spring compensates for wear. The surface of the sliding block 24 is provided with a self-lubricating coating. The self-lubricating coating is preferably a polytetrafluoroethylene (PTFE) based composite coating or a mixed solid lubricating coating of molybdenum disulfide (MoS2) and PTFE. Specifically, the coating is mainly composed of PTFE (polytetrafluoroethylene, mass percentage 50-70%) as the matrix, supplemented with MoS2 (molybdenum disulfide, mass percentage 10-30%) and a small amount of graphite (5-15%) as solid lubricating fillers, and organic or inorganic binders (such as epoxy resin or polyimide resin) are added to improve adhesion.

[0045] Reference Figure 3 , Figure 4 and Figure 5 A wear indicator is integrated within the sliding groove 23, configured to provide visual or tactile feedback when the spring compression exceeds a preset threshold. The visual indicator can be an observation window (transparent plastic cover or opening) on ​​the outer wall of the sliding groove 23. A color indicator rod (or indicator piece) is fixed to the sliding block 24, one end of which is connected to the sliding block 24, and the other end has a red warning mark. Under normal conditions, the indicator rod is hidden within the sliding groove 23 or displays a green / colorless mark. When the spring's permanent compression increases due to wear / fatigue, causing the sliding block 24's stroke to exceed the design range, the indicator rod extends further with the sliding block 24, and the red warning mark enters the observation window, providing a visual alarm and prompting the user to maintain or replace the protruding component 10. The tactile feedback indicator can be an auxiliary small spring (with a stiffness 1.5-2 times higher than the main spring) connected in series between the spring and the sliding block 24, its compression stroke designed to a preset threshold (e.g., 2-3 mm). When the main spring is compressed beyond the threshold, the auxiliary small spring begins to compress significantly, generating noticeable additional resistance (a tactile "hard spot" or "sticking sensation") when the sliding block 24 pushes the locking block 9. During the folding seat 3 operation, the user can clearly perceive this "hard spot" by hand, thus realizing that the wear has reached a critical value and maintenance is needed.

[0046] Reference Figure 5 and Figure 6Both protrusions 22 have arc-shaped inclined surfaces 25, and the base 1 has a guide groove. The locking block 9 slides along the guide groove to reciprocate between the locked and unlocked positions. The base 1 has a reset elastic element, which can be a spring or torsion spring, etc. Under the action of the reset elastic element, the locking block 9 moves towards the locked position. When the base 3 is installed in the forward direction, the arc-shaped inclined surface 25 on the protrusion 22 of the first protruding component drives the locking block 9 to disengage from the locking groove. When the base 3 is installed in the reverse direction, the arc-shaped inclined surface 25 on the protrusion 22 of the second protruding component drives the locking block 9 to disengage from the locking groove. Thus, regardless of whether the base 3 is installed in the forward or reverse direction, linkage unlocking can be achieved.

[0047] Reference Figure 4 , Figure 5 and Figure 6 The locking seat is equipped with an abutment (not shown in the figure), and the sliding block 24 has an integrally formed abutment protrusion 26. When the seat plate 5 and the backrest 7 are closed, the abutment protrusion 26 contacts the abutment, which provides a certain amount of damping to prevent children from accidentally inserting their fingers between the seat plate 5 and the backrest 7 and getting their fingers pinched. During the closing process, the abutment pushes the abutment protrusion 26 through the abutment, causing the sliding block 24 to move into the sliding groove 23, thus facilitating the closing of the seat plate 5 and the backrest 7. At this time, the abutment abuts against the other side of the abutment protrusion 26. Under the action of the spring, the sliding block 24 and the abutment protrusion 26 move in the starting direction. A certain driving force is required for the seat plate 5 to push the abutment protrusion 26 and drive the sliding block 24 into the sliding groove 23 during the reverse rotation, which has a certain locking effect.

[0048] Reference Figure 4 , Figure 5 and Figure 6 The end of the protrusion 22 is provided with an abutting slope 27 that cooperates with the locking block 9, so that when the seat 3 rotates from the folded state to the unfolded state, the protruding part 10 slides along the abutting slope 27 to avoid the locking block 9 when it contacts the locking block 9, so as to avoid unlocking the frame again during the unfolding process.

[0049] Reference Figure 1 and Figure 2 The first locking block 11 and the second locking block 15 each include two locking sub-blocks. The connecting parts include a first connecting part and a second connecting part that connect the two locking sub-blocks respectively. The first connecting part and the second connecting part are detachably connected. One of the first connecting part or the second connecting part is connected to the corresponding first or second unlocking handle. During operation, the first connecting part and the second connecting part must be connected first and then unlocked by the corresponding first or second unlocking handle to avoid accidental activation.

[0050] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or variations made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A children's stroller, comprising a frame, the frame including a base (1) connected to wheels and a push handle (2) connected to the base (1) and facilitating pushing, wherein the push handle (2) and the base (1) are locked in the unfolded state by a locking mechanism provided on the frame; A seat (3) is installed on the frame. The seat (3) includes a fixed base (4), a seat plate (5), a front armrest (6), a backrest (7), and a cover (8). The fixed base (4) and the cover (8) are fixedly connected to form a locking seat with a slot. The seat plate (5) is locked to the fixed base (4) by a first locking mechanism. The front armrest (6) is locked to the fixed base (4) by a second locking mechanism. The backrest (7) is locked to the front armrest (6) and / or the cover (8) by at least one third locking mechanism. The seat (3) can rotate relative to the frame from the unfolded position to the folding direction when it is unlocked. Its features are: The locking mechanism includes a locking groove disposed on the pusher (2) and a locking block (9) disposed on the base (1). The locking block (9) engages with the locking groove in the locking position to lock the frame in the unfolded state. At least one protruding part (10) is provided at the bottom of the seat (3). The protruding part (10) is arranged to contact the locking block (9) and apply a driving force to the locking block (9) when the seat (3) rotates relative to the frame from the unfolded position to the folding direction, so that the locking block (9) disengages from the locking groove to release the locking of the frame, thereby realizing the conversion of the frame from the unfolded state to the folded state in conjunction during the folding of the seat (3). The seat plate (5) is connected to a foot pedal (13) on the front side. The foot pedal (13) is provided with a first unlocking handle (14). The first locking mechanism includes a first locking block (11) slidably disposed in the seat plate (5). The fixed seat (4) is provided with a first locking groove (12). The first locking block (11) is inserted into the first locking groove (12). The seat plate (5) is provided with a first connecting member connecting the first unlocking handle (14) and the first locking block (11). The first unlocking handle (14) acts on the first connecting member to drive the first locking block (11) to disengage from the first locking groove (12). The second locking mechanism includes a second locking block (15) slidably disposed in the fixed seat (4), a second locking groove (16) is provided on the armrest, a spring is provided in the fixed seat (4) to push the second locking block (15) into the second locking groove (16), a guide surface (17) is provided on one side of the inner wall of the second locking groove (16), when the seat plate (5) rotates upward and / or the backrest (7) folds forward, the second locking block (15) is pushed towards the fixed seat (4) under the action of the guide surface (17) to unlock.

2. The stroller according to claim 1, characterized in that, The third locking mechanism includes a third locking block (18) slidably disposed in the backrest (7). The fixed seat (4) and the pressure cover (8) are both provided with a third locking groove (19). The third locking block (18) is simultaneously engaged with the third locking groove (19) provided in both the fixed seat (4) and the pressure cover (8). The backrest (7) is provided with a second connecting member that connects the second unlocking handle (20) and the third locking block (18). The second unlocking handle (20) acts on the second connecting member to drive the third locking block (18) to disengage from the third locking groove (19).

3. The stroller according to claim 2, characterized in that, The first connector and the second connector are unlocking links and / or flexible cables, used to disengage the corresponding first locking block (11) and the second locking block (15) from the corresponding first locking groove (12) and the third locking groove (19) when the first locking block (11) and the second locking block (15) are pulled.

4. The stroller according to claim 3, characterized in that, The protruding component (10) includes a first protruding component (10) and a second protruding component (10). The first protruding component (10) and the second protruding component (10) include a protrusion (22). A sliding groove (23) is provided on the protrusion (22). A sliding block (24) is slidably disposed in the sliding groove (23). A spring is provided in the sliding groove (23) to connect the sliding block (24) and push the locking block (9) downward during rotation. At the same time, the spring compensates for wear. The surface of the sliding block (24) is provided with a self-lubricating coating. A wear indicator is integrated in the sliding groove (23). The wear indicator is configured to provide visual or tactile feedback when the spring is compressed beyond a preset threshold.

5. The stroller according to claim 4, characterized in that, The protruding part (10) is provided with an abutment groove, the locking seat is provided with an abutment member, and the sliding block (24) is integrally formed with an abutment protrusion (26). When the seat plate (5) and the backrest (7) are closed, there is a certain damping to prevent the hand from being pinched. During the closing process, the sliding block (24) is driven to move by the abutment protrusion (26) to close, and is initially locked by the other side of the abutment protrusion (26).

6. The stroller according to claim 5, characterized in that, The seat (3) can be installed on the frame in either the forward or reverse direction. The protrusion (22) has an arc-shaped inclined surface (25). The locking block (9) can slide along the guide groove on the frame to move back and forth between the locked and unlocked positions. The base (1) is provided with a reset elastic element. The locking block (9) moves toward the locked position under the action of the reset elastic element. When the seat (3) is installed in the forward direction, the locking block (9) is driven to disengage from the locking groove by the arc-shaped inclined surface (25) of the protrusion (22) of the first protruding component (10). When the seat (3) is installed in the reverse direction, the locking block (9) is driven to disengage from the locking groove by the arc-shaped inclined surface (25) of the protrusion (22) of the second protruding component (10).

7. The stroller according to claim 6, characterized in that, The end of the protrusion (22) is provided with an abutting slope (27) that cooperates with the locking block (9), so that when the seat (3) rotates from the folded state to the unfolded state, the protruding part (10) slides along the abutting slope (27) and avoids the locking block (9) when it contacts the locking block (9), so as to avoid unlocking the frame again during the unfolding process.

8. The stroller according to claim 7, characterized in that, The first locking block (11) and the second locking block (15) each include two locking sub-blocks. The connectors include a first connector and a second connector that connect the two locking sub-blocks respectively. The first connector and the second connector are detachably connected. One of the first connector or the second connector is connected to the corresponding first unlocking handle (14) or the second unlocking handle (20). During operation, the first connector and the second connector must be connected first and then unlocked by the corresponding first or second unlocking handle to avoid accidental contact.

Images