A locking mechanism for a stroller and the stroller

Abstract

This utility model discloses a locking mechanism for a stroller and the stroller itself. The locking mechanism includes: a limiting tube arranged along the y-axis, with transverse grooves distributed along the x-axis; a first sliding member and a second sliding member, both sliding along the y-axis, the first sliding member having a first groove and the second sliding member having a second groove, the first groove, the second groove and the transverse groove being staggered, and the first groove and the second groove being symmetrically distributed along the x-axis; a limiting pin inserted into the transverse groove, the first groove and the second groove; a locking member connected to the second sliding member; and an elastic member used to keep the first sliding member and the second sliding member in a state of mutual separation. Driving the first sliding member synchronously drives the second sliding member and the locking member to achieve rapid switching between locking and unlocking; the mechanical constraint of the grooves and the limiting pin transmits the movement, and the reset function of the elastic member ensures reliable engagement between the locking member and the hinge joint.

Description

Technical Field

[0001] This application relates to the field of stroller technology, specifically to a locking mechanism for a children's stroller and the stroller itself. Background Technology

[0002] Baby strollers have become an essential tool for infants and toddlers. Beyond the basic requirements of stability and safety, users are increasingly emphasizing features such as small size, lightweight design, and foldability. A typical baby stroller includes a foldable lower frame, a push handle assembly rotatably connected to the lower frame, a frame locking mechanism located at the connection between the push handle and the lower frame, and a telescopic adjustment mechanism. The frame locking and telescopic adjustment mechanisms usually employ a steel cable traction mechanism for unlocking. When the user needs to unlock, they press, flick, or rotate the operating component, causing the steel cable to stretch along a preset path. The steel cable then pulls the locking component to overcome the elastic force of the elastic component, moving it from the locked position to the unlocked position, thus releasing the constraint on the target component and ultimately unlocking it.

[0003] To ensure the smoothness and accuracy of wire rope traction, the length and tension of the wire rope, as well as the installation position of guide components (such as pulleys and guide sleeves), must be strictly controlled during the assembly process. If the wire rope is too long, it will become slack, causing traction lag; if it is too short, it will generate preload, causing the locking components to be unable to remain stably locked, and may even cause premature fatigue of the wire rope. This increases the complexity of the production process, requires a lot of time for manual adjustment, significantly reduces the batch production efficiency of the equipment, and assembly errors are difficult to completely avoid. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes:

[0005] A locking mechanism for a stroller, the stroller including a hinge joint having a locking groove, the locking mechanism comprising:

[0006] The limiting tube is set along the y-axis direction and has transverse sliding grooves distributed along the x-axis direction.

[0007] Both the first sliding member and the second sliding member can slide along the y-axis. The first sliding member is provided with a first sliding groove, and the second sliding member is provided with a second sliding groove. The first sliding groove, the second sliding groove and the transverse sliding groove are staggered, wherein the first sliding groove and the second sliding groove are symmetrically distributed along the x-axis.

[0008] The limiting pin is inserted into the transverse slide groove, the first slide groove and the second slide groove;

[0009] The locking element is connected to the second sliding element;

[0010] An elastic element is used to keep the first sliding element and the second sliding element in a state of being far apart from each other;

[0011] The first sliding member can move towards the second sliding member under the action of an external force, thereby driving the second sliding member and the locking member to move towards the first sliding member simultaneously, until the locking member moves out into the locking groove and unlocks, thus unlocking the hinge joint. After the external force is removed, the first sliding member and the second sliding member move away from each other under the action of the elastic member, causing the locking member to move into the locking groove and lock.

[0012] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the first slide and the second slide form an acute angle α with the y-axis, and the value of α is in the range of 30°~60°.

[0013] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: both the first sliding member and the second sliding member are disposed inside the limiting tube.

[0014] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the two ends of the elastic member are respectively connected to the locking member and the limiting tube.

[0015] This application also proposes a stroller, including a first rod assembly and a second rod assembly, the first rod assembly and the second rod assembly being hinged to each other to form the hinge joint, and further including the above-mentioned locking mechanism, the locking mechanism being disposed on the first rod assembly, the second rod assembly being provided with the locking groove, and the locking member extending into the locking groove.

[0016] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the first rod assembly is a push handle assembly, and the second rod assembly is a lower frame.

[0017] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the lower frame includes a rear frame rod and a front frame rod that are hinged to each other, as well as a folding locking structure that limits the two to the unfolded state.

[0018] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the push handle assembly includes an upper push handle and a lower push handle. The lower push handle is hinged to the lower frame to form the hinge joint. The locking mechanism is disposed on the lower push handle. The upper push handle is slidably mounted on the lower push handle and connected to the lower push handle through a telescopic locking assembly. After the telescopic locking assembly is unlocked, the upper push handle can slide to the lower end of the lower push handle under the action of external force and push the first sliding member to move closer to the second sliding member.

[0019] The beneficial effects of this utility model are as follows: This mechanism can simultaneously drive the second sliding member and the locking member by driving the first sliding member with a single external force, achieving rapid switching between locking and unlocking; the mechanical constraint of the sliding groove and the limit pin transmits the motion, and the reset function of the elastic member ensures reliable engagement between the locking member and the hinge joint in the locked state. Furthermore, this locking mechanism adopts an integrated modular design; during assembly, only the integrated module needs to be installed through a preset positioning structure, reducing the complexity of manual operation and eliminating the need for debugging. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the installation structure of the locking mechanism described in Example 1;

[0022] Figure 2 This is a cross-sectional view of the locking member being moved into the locking groove as described in Example 1;

[0023] Figure 3 This is a cross-sectional view of the locking member moving out of the locking groove as described in Example 1;

[0024] Figure 4 This is an exploded view of the locking mechanism described in Example 1;

[0025] Figure 5 This is a schematic diagram of the locking mechanism in Example 1 when it is locked.

[0026] Figure 6 This is a schematic diagram of the structure of the locking element when it is unlocked, as described in Example 1.

[0027] Figure 7 This is a schematic diagram of the stroller described in Example 2;

[0028] Figure 8 This is an exploded view of the structure of the stroller described in Example 2. Detailed Implementation

[0029] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0030] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0031] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In this utility model, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to direct connection or indirect connection through an intermediate medium; they can refer to fixed connection, detachable connection, or integral molding; they can refer to mechanical connection; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Example 1

[0034] Reference Figure 1-6 Embodiment 1 of this application discloses a locking mechanism for a stroller, comprising:

[0035] The limiting tube 31 is set along the y-axis direction, and has transverse sliding grooves 311 distributed along the x-axis direction on it;

[0036] Both the first sliding member 32 and the second sliding member 33 can slide along the y-axis. The first sliding member 32 is provided with a first sliding groove 321, and the second sliding member 33 is provided with a second sliding groove 331. The first sliding groove 321, the second sliding groove 331 and the transverse sliding groove 311 are staggered, wherein the first sliding groove 321 and the second sliding groove 331 are symmetrically distributed along the x-axis.

[0037] The limiting pin 34 is inserted into the transverse slide groove 311, the first slide groove 321 and the second slide groove 331;

[0038] The locking element 35 is connected to the second sliding element 33 and extends into the locking groove 21;

[0039] The elastic element 36 is used to keep the first sliding element 32 and the second sliding element 33 in a state of being far apart from each other;

[0040] The first sliding member 32 can move towards the second sliding member 33 under the action of external force, thereby driving the second sliding member 33 and the locking member 35 to move towards the first sliding member 32 simultaneously, until the locking member 35 moves to the unlocked position of the unlocked hinge joint; after the external force is removed, the first sliding member 32 and the second sliding member 33 move away from each other under the action of the elastic member 36, so that the locking member 35 returns to the locked position of the locked hinge joint.

[0041] Initial locking state: Under the elastic force of the elastic member 36, the first sliding member 32 and the second sliding member 33 are in a position away from each other. At this time, the limiting pin 34 is in its initial position under the staggered constraint of the transverse slide groove 311, the first slide groove 321 and the second slide groove 331, and the locking member 35 connected to the second sliding member 33 extends into the locking groove 21 of the hinge joint to lock the hinge joint.

[0042] Unlocking process: When the first slider 32 is subjected to an external force along the y-axis towards the second slider 33, the first slider 32 moves along the y-axis, and its inclined first groove 321 generates an oblique pushing force on the limiting pin 34. Since the limiting pin 34 is constrained by the transverse groove 311 and cannot move along the y-axis, it can only slide along the x-axis; at the same time, the limiting pin 34 is embedded in the second groove 331, and its sliding in the x-axis direction will generate a reaction force on the second groove 331. Because the second groove 331 and the first groove 321 are symmetrically inclined, the y-axis component of the reaction force will push the second slider 33 towards the first slider 32 synchronously along the y-axis. As the second slider 33 moves, the locking member 35 gradually disengages from the locking groove 21 of the hinge joint and finally reaches the unlocked position, allowing the hinge joint to move freely, realizing folding or angle adjustment.

[0043] Reset locking process: After the external force applied to the first sliding member 32 is removed, when the locking member 35 is aligned with the locking groove 21, the elastic force of the elastic member 36 is released, pushing the first sliding member 32 and the second sliding member 33 away from each other along the y-axis, causing the locking member 35 to re-enter the locking groove 21, and the hinge joint is locked again.

[0044] This mechanism uses a single external force to drive the first sliding member 32, which simultaneously moves the second sliding member 33 and the locking member 35, enabling rapid switching between locking and unlocking. The mechanical constraints of the sliding groove and the limiting pin 34 transmit the motion, and the reset function of the elastic member 36 ensures reliable engagement between the locking member 35 and the hinge joint in the locked state. Furthermore, this locking mechanism 30 adopts an integrated modular design; during assembly, only the integrated module needs to be installed through a pre-set positioning structure, reducing the complexity of manual operation and eliminating the need for debugging.

[0045] Preferably, the first groove 321 and the second groove 331 form an acute angle α with the y-axis, and the value of α is in the range of 30° to 60°.

[0046] The first slide groove 321 and the second slide groove 331 need to be designed to be obliquely distributed and form an angle α with the y-axis, i.e., the sliding direction, and refer to the attached diagram. Figure 2 As shown, the first slide groove 321 and the second slide groove 331 are symmetrically distributed along the x-axis, with the first slide groove 321 tilted to the left by an angle α and the second slide groove 331 tilted to the right by an angle α. By designing the angle α to be between 30° and 60°, it can be ensured that the first and second sliding members 33 approach each other synchronously and smoothly.

[0047] Preferably, the first sliding member 32 and the second sliding member 33 are both disposed inside the limiting tube 31.

[0048] The inner wall of the limiting tube 31 guides and limits the sliding of the slider along the y-axis, preventing radial offset or wobbling during movement. This ensures precise engagement between the first and second sliding grooves 331 and the limiting pin 34, thereby ensuring stable insertion and disengagement of the locking member 35 into or out of the locking groove 21, reducing problems such as unsmooth unlocking or loose locking. Simultaneously, the limiting tube 31 integrates the first slider 32 and the second slider 33 internally, avoiding the occupation of external space on the stroller.

[0049] The elastic element 36 is connected at both ends to the locking element 35 and the limiting tube 31, respectively. The elastic element 36 can extend and retract synchronously with the movement of the locking element 35, and its movement trajectory can avoid the sliding paths of the first sliding element 32 and the second sliding element 33 in the limiting tube 31, and will not interfere with the y-axis movement of the first sliding element 32 and the second sliding element 33.

[0050] Example 2

[0051] See attached document Figure 7-8 As shown, this embodiment proposes a stroller, including a first rod assembly 10 and a second rod assembly 20. The first rod assembly 10 and the second rod assembly 20 are hinged to each other to form the hinge joint. It also includes the locking mechanism 30 described in Embodiment 1. The locking mechanism 30 is disposed on the first rod assembly 10. The second rod assembly 20 is provided with a locking groove 21. The locking member 35 extends into the locking groove 21.

[0052] The locking mechanism 30 can be used to adjust the backrest angle of the stroller. Specifically, the first lever assembly 10 corresponds to the stroller's seat frame, and the second lever assembly 20 corresponds to the stroller's seat backrest frame. The seat frame can be provided with multiple locking slots 21 circumferentially spaced around the hinge joint. When the parent moves the first sliding member 32, the locking member 35 disengages from the arc-shaped locking slot 21, allowing the backrest angle to be adjusted by flipping it forward / backward. After releasing the lever, the elastic member 36 pushes the locking member 35 to automatically engage with the locking slot 21 corresponding to the current angle, preventing accidental rotation of the backrest during use. When the locking mechanism 30 is used to adjust the backrest angle of the stroller, the first sliding member 32 can be designed as an easy-to-operate lever-type structure, with the lever sliding along the limiting tube 31.

[0053] The locking mechanism 30 can also be used at the folding joint of the lower frame 50. The lower frame 50 includes a rear frame rod 51 and a front frame rod 52 that are hinged to each other. The first rod assembly 10 corresponds to the rear frame rod 51, and the second rod assembly 20 corresponds to the front frame rod 52. The limiting tube 31 of the locking mechanism 30 is set along the length direction of the rear frame rod 51 and built in. The first sliding member 32 is designed as a hidden press button and integrated into the side wall of the rear frame rod 51. The side wall of the front frame rod 52 has a corresponding locking groove 21. When the stroller needs to be folded, the first sliding member 32 on the rear frame rod 51 is pressed, and the locking member 35 disengages from the locking groove 21 of the front frame rod 52 boss. The front frame rod 52 can rotate relative to the rear frame rod 51 around the hinge joint, thereby folding the lower frame 50.

[0054] Specifically, in this embodiment, the first lever assembly 10 is a push handle assembly 40, and the second lever assembly 20 is a lower frame 50.

[0055] The locking mechanism 30 is used for the push handle assembly 40 and the lower frame 50. The push handle assembly 40 is hinged to the lower frame 50. The locking mechanism 30 is provided on the push handle assembly 40. The lower frame 50 is provided with the locking groove 21. When the locking member 35 moves out of the locking groove 21, the push handle assembly 40 can rotate relative to the lower frame 50 and fold close to the lower frame 50.

[0056] Based on the above, the lower frame 50 further includes a rear frame rod 51 and a front frame rod 52 that are hinged to each other, and a folding locking structure 53 that limits the two to the unfolded state.

[0057] In this embodiment, the locking mechanism 30 is built into the push handle assembly 40, and its limiting tube 31 is arranged along the length direction of the push handle assembly 40. The locking member 35 extends into the locking groove 21 of the lower frame 50, so that the push handle assembly 40 and the lower frame 50 are kept at an inclined angle when pushed through the hinge joint, and cannot rotate relative to each other. At this time, the rear frame rod 51 and the front frame rod 52 of the lower frame 50 are unfolded through the hinge joint, and the limiting bosses of the two abut against each other to form a rigid support, restricting the relative rotation of the rear frame rod 51 and the front frame rod 52, and ensuring that the lower frame 50 remains in the unfolded state.

[0058] The folding locking structure can be a limiting boss provided on the rear frame rod 51 and the front frame rod 52. The limiting bosses on the rear frame rod 51 and the front frame rod 52 abut against each other to lock them in the unfolded state. When it is necessary to fold the push handle to reduce the storage volume, the user presses the first sliding member 32 (such as a press button structure or a paddle structure) towards the second sliding member 33, so that the locking member 35 disengages from the locking groove 21 of the lower frame 50, and the hinge joint between the push handle assembly 40 and the lower frame 50 is unlocked. At this time, the push handle assembly 40 can be rotated to be close to the lower frame 50, and then the stroller can be lifted, and the rear frame rod 51 and the front frame rod 52 can be rotated to fold.

[0059] In another embodiment, the folding locking structure 53 needs to be unlocked before the rear frame rod 51 and the front frame rod 52 can rotate relative to each other and fold.

[0060] Furthermore, the push handle assembly 40 includes an upper push handle 41 and a lower push handle 42. The lower push handle 42 is hinged to the lower frame 50 to form the hinge joint. The locking mechanism 30 is disposed on the lower push handle 42. The upper push handle 41 is slidably mounted on the lower push handle 42 and connected to the lower push handle 42 through a telescopic locking assembly 43. After the telescopic locking assembly 43 is unlocked, the upper push handle 41 can slide to the lower end of the lower push handle 42 under the action of external force and push the first sliding member 32 to move closer to the second sliding member 33.

[0061] The locking mechanism 30 is integrated into the push handle 42, and the locking element 35 extends into the locking groove 21 of the lower frame 50. The push handle 42 and the lower frame 50 maintain a fixed pushing angle, and the push handle assembly 40 cannot rotate relative to the lower frame 50.

[0062] The upper push handle 41 is slidably disposed inside or outside the lower push handle 42. The telescopic locking component 43, such as a ball buckle or a press lock pin, fixes the upper push handle 41 at a height suitable for the parent to push. After the user operates the telescopic locking component 43 to release the positioning constraint between the upper push handle 41 and the lower push handle 42, the user pushes the upper push handle 41 downward, causing it to slide along the lower push handle 42 to its lower end. When the upper push handle 41 slides to the lower end of the lower push handle 42, the end or inner protrusion of the upper push handle 41 contacts the first sliding member 32 of the locking mechanism 30, and continues to apply a downward external force to push the first sliding member 32 closer to the second sliding member 33 along the y-axis direction of the limiting tube 31, so that the locking member 35 disengages from the locking groove 21 of the lower frame 50, and the hinge joint between the lower push handle 42 and the lower frame 50 is unlocked. The user can push the lower push handle 42 to rotate and fold around the hinge joint towards the lower frame 50 until it fits against the surface of the lower frame 50.

[0063] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A locking mechanism for a stroller, the stroller comprising an articulating joint, said articulating joint being provided with a locking slot (21), characterized in that, include: The limiting tube (31) is set along the y-axis direction and has transverse sliding grooves (311) distributed along the x-axis direction. Both the first sliding member (32) and the second sliding member (33) can slide along the y-axis. The first sliding member (32) is provided with a first sliding groove (321), and the second sliding member (33) is provided with a second sliding groove (331). The first sliding groove (321), the second sliding groove (331) and the transverse sliding groove (311) are staggered, wherein the first sliding groove (321) and the second sliding groove (331) are symmetrically distributed along the x-axis. The limiting pin (34) is inserted into the transverse slide (311), the first slide (321) and the second slide (331); The locking element (35) is connected to the second sliding element (33); The elastic element (36) is used to keep the first sliding element (32) and the second sliding element (33) in a state of being far apart from each other; The first sliding member (32) can move towards the second sliding member (33) under the action of external force, thereby driving the second sliding member (33) and the locking member (35) to move towards the first sliding member (32) simultaneously until the locking member (35) moves out into the locking groove (21) and unlocks, unlocking the unlocked position of the hinge joint; after the external force is removed, the first sliding member (32) and the second sliding member (33) move away from each other under the action of the elastic member (36), so that the locking member (35) moves into the locking groove (21) and locks.

2. The locking mechanism (30) according to claim 1, characterized in that The first groove (321) and the second groove (331) form an acute angle α with the y-axis, and the value of α ranges from 30° to 60°.

3. The locking mechanism (30) according to claim 1, characterized in that The first sliding member (32) and the second sliding member (33) are both disposed inside the limiting tube (31).

4. The locking mechanism (30) according to any one of claims 1-3, characterized in that The two ends of the elastic element (36) are respectively connected to the locking element (35) and the limiting tube (31).

5. A stroller characterized by The device includes a first rod assembly (10) and a second rod assembly (20), which are hinged to each other to form the hinge joint. It also includes a locking mechanism (30) as described in any one of claims 1-4, wherein the locking mechanism (30) is disposed on the first rod assembly (10), and the second rod assembly (20) is provided with the locking groove (21), and the locking member (35) extends into the locking groove (21).

6. The stroller of claim 5, wherein, The first lever assembly (10) is a push handle assembly (40), and the second lever assembly (20) is a lower frame (50).

7. The stroller of claim 6, wherein, The lower frame (50) includes a rear frame rod (51) and a front frame rod (52) that are hinged to each other, and a folding locking structure (53) that limits them to the unfolded state.

8. The stroller of claim 6, wherein, The push handle assembly (40) includes an upper push handle (41) and a lower push handle (42). The lower push handle (42) is hinged to the lower frame (50) to form the hinge joint. The locking mechanism (30) is disposed on the lower push handle (42). The upper push handle (41) is slidably mounted on the lower push handle (42) and connected to the lower push handle (42) through a telescopic locking assembly (43). After the telescopic locking assembly (43) is unlocked, the upper push handle (41) can slide to the lower end of the lower push handle (42) under the action of external force and push the first sliding member (32) to move closer to the second sliding member (33).

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