A frame for a pushchair

Abstract

The application discloses a frame body of a baby carriage, which comprises an upper frame, a handle telescopic rod, a chassis and a folding structure. The upper frame comprises a crossbeam part and a sleeve part which is arranged perpendicularly to the crossbeam part and extends from both ends of the crossbeam part. One side of the crossbeam part is hingedly connected to one side of the chassis, and the telescopic rod part of the handle telescopic rod is slidingly sleeved in the sleeve part. The folding structure comprises a sliding rail, a sliding assembly and a connecting rod. The sliding rail is arranged in the length direction of the sleeve part, the sliding assembly is slidably connected to the sliding rail, and the two ends of the connecting rod are rotatably connected to the sliding assembly and the chassis respectively. The sliding assembly comprises a telescopic locking piece. One end of the locking piece passes through the sliding rail and abuts against the sleeve part. One side of the sleeve part corresponding to the locking piece is provided with a locking hole. When the telescopic rod part is staggered with the locking hole and the upper frame and the chassis are opened at a preset angle, the locking piece can be clamped in the locking hole. When the telescopic rod part covers the locking hole, the locking piece exits the locking hole, so that the technical effect that the frame body is convenient to open and close is achieved.

Description

Technical Field

[0001] This application relates to the field of stroller technology, specifically to a stroller frame. Background Technology

[0002] With the increasing travel needs of modern families, strollers, as an important tool for traveling with infants and toddlers, are attracting more and more attention from parents for their convenience and practicality. To meet the storage and carrying needs during travel, most strollers on the market are designed with a foldable frame structure to reduce the space occupied when not in use, making them suitable for scenarios such as car trunk storage and public transportation.

[0003] Current stroller frames typically use multiple brackets connected by several rotating mechanisms, along with additional folding and locking mechanisms to achieve folding functionality. However, the coordination of these rotating and locking mechanisms is not only complex, but the folding process is also cumbersome. Users often need to use both hands to complete actions such as unlocking and folding. When carrying an infant alone, the folding process is time-consuming and laborious, failing to meet users' core need for convenience. Utility Model Content

[0004] Therefore, this application provides a stroller frame to solve the technical problems of complex folding structure and cumbersome operation of existing stroller frames.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A stroller frame includes an upper frame, a telescopic handlebar, a chassis, and a folding structure. The upper frame includes a crossbeam and a sleeve extending from both ends of the crossbeam and perpendicular to it. One side of the crossbeam is hinged to one side of the chassis. The telescopic handlebar is slidably fitted inside the sleeve. The folding structure includes a slide rail, a sliding assembly, and a connecting rod. The slide rail is arranged along the length of the sleeve. The sliding assembly is slidably connected to the slide rail. Both ends of the connecting rod are rotatably connected to the sliding assembly and the chassis, respectively.

[0007] The sliding assembly includes a retractable locking member. One end of the locking member passes through the slide rail and abuts against the sleeve portion. The sleeve portion has a locking hole on one side corresponding to the locking member. When the telescopic rod portion is misaligned with the locking hole and the upper frame and chassis are opened at a preset angle, the locking member can be engaged in the locking hole to restrict the sliding of the sliding assembly. When the telescopic rod portion covers the locking hole, the locking member exits the locking hole to release the sliding restriction on the sliding assembly.

[0008] Optionally, the sliding assembly further includes a slider, which includes an integrally formed snap-fit ​​part and a connecting part. The snap-fit ​​part is slidably snapped onto the slide rail, and the connecting part is rotatably connected to one end of the connecting rod.

[0009] Alternatively, the end of the slide rail near the handle telescopic rod is a closed end, and the other end of the slide rail is an open end, with a detachable fixing block provided on the open end.

[0010] Optionally, the slide rail has a first through hole along its length on the side corresponding to the locking member. The slider has a receiving cavity with an opening facing the slide rail. A first spring is provided in the receiving cavity. One end of the locking member is located in the receiving cavity and compresses the first spring. The other end of the locking member abuts against the sleeve portion through the first through hole. The locking hole is provided corresponding to one end of the first through hole. When the slider slides to the closed end of the slide rail, one end of the locking member can be engaged in the locking hole.

[0011] Optionally, a buffer assembly is provided at one end of the connecting rod connected to the chassis. The buffer assembly is sleeved on the connecting rod, and the end of the buffer assembly near the sliding assembly is fixed to the connecting rod. The other end of the buffer assembly is rotatably connected to the chassis via a rotating shaft. A long strip-shaped second through hole is provided along the length direction at the end of the connecting rod away from the sliding assembly, and the rotating shaft passes through the second through hole.

[0012] Compared with the prior art, this application has at least the following beneficial effects:

[0013] On the one hand, the upper frame and chassis of this application are connected by a hinge, providing basic support for the rotation of the upper frame relative to the chassis and forming the rotational core of the opening and closing action. A slide rail is set along the length of the sleeve, and the sliding component is slidably connected to the slide rail, providing a linear movement path for the opening and closing process of the upper frame. The two ends of the connecting rod are respectively rotatably connected to the sliding component and the chassis, forming a linkage transmission structure. When it is necessary to unfold the frame, the upper frame is pushed to rotate around the hinge, and the sliding component will slide synchronously along the slide rail as the upper frame rotates. The connecting rod will adapt to the rotation to coordinate the positions of the two. When it is necessary to close the frame, the upper frame is pushed in the opposite direction, the sliding component slides in the opposite direction along the slide rail, and the connecting rod adjusts its angle synchronously, finally realizing the closure of the upper frame and chassis. The entire opening and closing process can be completed by only the simple coordination of "hinge rotation + sliding component sliding + connecting rod rotation", which greatly simplifies the structural composition.

[0014] On the other hand, the sliding assembly is equipped with a retractable locking element. One end of the locking element passes through the slide rail and abuts against the sleeve. The sleeve has a locking hole on the side corresponding to the locking element. As a key positioning structure, when the frame is in the unfolded state (the upper frame and chassis are opened at a preset angle) and the telescopic rod is misaligned with the locking hole, the telescopic function of the locking element is unimpeded. The locking element engages in the locking hole, thus rigidly limiting the sliding assembly and preventing it from moving along the slide rail. Through the linkage between the sliding assembly and the connecting rod, the relative position of the upper frame and chassis is firmly fixed, preventing the frame from shaking or accidentally folding during use and ensuring safety. When it is necessary to release the positioning for folding, simply slide the telescopic rod of the handle so that the telescopic rod covers the locking hole, which will squeeze the locking element to disengage it from the locking hole, quickly releasing the positioning state. The operation is simple and the positioning reliability is high. Attached Figure Description

[0015] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0016] Figure 1 A first view structural schematic diagram of a stroller frame provided in an embodiment of this application;

[0017] Figure 2 A second view structural schematic diagram of a stroller frame provided in an embodiment of this application;

[0018] Figure 3 Examples of embodiments in this application Figure 2 AA section view;

[0019] Figure 4 This is a partially exploded view of the sliding component in an embodiment of this application;

[0020] Figure 5 This is a schematic diagram of the slide rail installation structure in an embodiment of this application;

[0021] Figure 6 A partially exploded structural diagram of a stroller frame provided in an embodiment of this application;

[0022] Figure 7 This is a structural schematic diagram of the snap-fit ​​state of a stroller frame provided in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Upper frame; 11. Crossbeam; 12. Sleeve; 121. Locking hole; 2. Handle telescopic rod; 21. Handle; 22. Telescopic rod; 3. Chassis; 4. Closing structure; 41. Slide rail; 411. First through hole; 42. Connecting rod; 421. Second through hole; 422. Sleeve; 5. Sliding assembly; 51. Locking element; 511. Ball head; 52. Slider; 521. Snap-fit ​​part; 522. Connecting part; 523. First spring element; 524. Receiving cavity; 6. Fixing block; 7. Buffer assembly; 71. First fixing element; 72. Second fixing element; 73. Second spring element; 8. Seat fixing frame; 9. Hinge. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] refer to Figures 1 to 7 As shown, this utility model provides a stroller frame, including an upper frame 1, a handlebar telescopic rod 2, a chassis 3, and a folding structure 4. The upper frame 1 includes a crossbeam 11 and a sleeve 12 extending from both ends of the crossbeam 11 and arranged perpendicularly to the crossbeam 11. One side of the crossbeam 11 is hinged to one side of the chassis 3, preferably by a hinge 9. The handlebar telescopic rod 2 includes a handle 21 arranged laterally and a telescopic rod 22 fixed at one end to the handle 21. Two telescopic rods 22 are provided and are respectively arranged at both ends of the handle 21. The telescopic rod 22 is sleeved in the sleeve 12 and can slide back and forth along the length direction of the sleeve 12.

[0027] Two retraction structures 4 are respectively provided on the two sleeve sections 12. The following discussion focuses on one retraction structure 4. The retraction structure 4 includes a slide rail 41, a sliding component 5, and a connecting rod 42. The slide rail 41 is provided on the sleeve section 12 along the length direction of the sleeve section 12. Preferably, the slide rail 41 is welded to the opposite side of the two sleeve sections 12 (hereinafter referred to as the "first side"). The sliding component 5 is slidably connected to the slide rail 41. The two ends of the connecting rod 42 are rotatably connected to the sliding component 5 and the chassis 3, respectively. The sliding component 5 slides along the slide rail 41. When the upper frame 1 is opened upward with the hinge connection as the axis, the sliding component 5 slides upward along the slide rail 41. When the upper frame 1 is fastened in the opposite direction (fastened towards the chassis 3), the sliding component 5 slides downward along the slide rail 41. It should be noted that when the upper frame 1 is fastened, with the hinge connection point as the rear, the end of the connecting rod 42 that is connected to the sliding component 5 is located behind the end of the connecting rod 42 that is connected to the chassis 3.

[0028] The sliding component 5 includes a retractable locking member 51. One end of the locking member 51 passes through the slide rail 41 and abuts against the sleeve part 12. The sleeve part 12 is provided with a locking hole 121 on the side corresponding to the locking member 51. The locking hole 121 is a through hole that passes through the first side, that is, the locking member 51 can extend into the sleeve part 12 through the locking hole 121. When the telescopic rod part 22 is misaligned with the locking hole 121 and the upper frame 1 and the chassis 3 are opened at a preset angle, the locking member 51 can be engaged in the locking hole 121. When the telescopic rod part 22 covers the locking hole 121, the locking member 51 exits the locking hole 121. The preset angle refers to the angle between the chassis 3 and the sleeve part 12 when the upper frame 1 is in normal use.

[0029] On one hand, the upper frame 1 and chassis 3 are connected by a hinge, providing basic support for the rotation of the upper frame 1 relative to the chassis 3 and forming the rotational core of the opening and closing action. A slide rail 41 is provided along the length direction on the sleeve part 12, and the sliding component 5 is slidably connected to the slide rail 41, providing a linear movement path for the opening and closing process of the upper frame 1. The two ends of the connecting rod 42 are respectively rotatably connected to the sliding component 5 and the chassis 3, forming a linkage transmission structure. When it is necessary to unfold the frame, the upper frame 1 is pushed to rotate around the hinge, and the sliding component 5 will slide synchronously along the slide rail 41 as the upper frame 1 rotates. The connecting rod 42 will adapt to the rotation to coordinate the positions of the two. When it is necessary to close the frame, the upper frame 1 is pushed in the opposite direction, the sliding component 5 slides in the opposite direction along the slide rail 41, and the connecting rod 42 adjusts its angle synchronously, finally realizing the closure of the upper frame 1 and chassis 3. The entire opening and closing process can be completed by only the simple coordination of "hinge rotation + sliding component 5 sliding + connecting rod 42 rotation", which greatly simplifies the structural composition.

[0030] On the other hand, the sliding component 5 is provided with a retractable locking member 51. One end of the locking member 51 can pass through the slide rail 41 and abut against the sleeve part 12. The sleeve part 12 is provided with a locking hole 121 on the side corresponding to the locking member 51. As a key positioning structure, when the frame is in the unfolded state (the upper frame 1 and the chassis 3 are opened at a preset angle) and the telescopic rod part 22 is misaligned with the locking hole 121, the telescopic function of the locking member 51 is not hindered. The locking member 51 is engaged in the locking hole 121. At this time, the locking member 51 forms a rigid limit on the sliding component 5 to prevent the sliding component 5 from moving along the slide rail 41. Through the linkage between the sliding component 5 and the connecting rod 42, the relative position of the upper frame 1 and the chassis 3 is firmly fixed to prevent the frame from shaking or accidentally folding during use and to ensure safe use. When it is necessary to release the positioning and retract the device, simply slide the handle extension rod 2 so that the extension rod part 22 covers the locking hole 121, and then squeeze the locking part 51 to make it exit the locking hole 121, quickly releasing the positioning state. The operation is simple and the positioning is highly reliable.

[0031] In one specific embodiment, the circumferential surface of the telescopic rod portion 22 is fitted inside the sleeve portion 12, wherein the first side surface of the sleeve portion 12 is flat. Preferably, both the telescopic rod portion 22 and the sleeve portion 12 are square tubes, so that when the telescopic rod portion 22 covers the locking hole 121, it compresses the locking member 51. The sliding assembly 5 also includes a slider 52, which includes an integrally formed snap-fit ​​portion 521 and a connecting portion 522. The snap-fit ​​portion 521 is slidably snapped onto the slide rail 41, and the connecting portion 522 is rotatably connected to one end of the connecting rod 42. Specifically, the snap-fit ​​portion 521 and the slide rail 41 are slidably connected through a dovetail groove structure. The connecting portion 522 is cylindrical, and a sleeve portion 422 is provided at one end of the connecting rod 42 near the connecting portion 522. The sleeve portion 422 is sleeved on the outer side of the connecting portion 522. On the side, a first rivet is provided at the end of the sleeve part 422 away from the first side. The first rivet passes through the sleeve part 422 along the central axis and is rotatably connected to the connecting part 522, thereby preventing the sleeve part 422 from detaching from the connecting part 522. The end of the connecting rod 42 away from the connecting part 522 is rotatably connected to the inner side of the chassis 3. The inner side of the chassis 3 and the first side are in the same vertical plane, that is, the rotation axis directions of the two ends of the connecting rod 42 are perpendicular to the first side and the inner side of the chassis 3, respectively.

[0032] The slide rail 41 has a first through hole 411 along its length on one side attached to the first side surface. That is, the slide rail 41 has a first through hole 411 along its length on the side corresponding to the locking member 51. The slider 52 has a receiving cavity 524 with an opening facing the slide rail 41. A first spring member 523 is provided in the receiving cavity 524. One end of the locking member 51 is provided in the receiving cavity 524 and compresses the first spring member 523. The other end of the locking member 51 abuts against the first side surface of the sleeve part 12 through the first through hole 411. That is, due to the snap-fit ​​connection between the snap-fit ​​part 521 and the slide rail 41, the locking member 51 is limited between the first spring member 523 and the first side surface.

[0033] The end of the slide rail 41 closest to the handlebar telescopic rod 2 is a closed end to prevent the sliding component 5 from detaching from the slide rail 41 during the opening of the upper frame 1. The end of the slide rail 41 furthest from the handlebar telescopic rod 2 is an open end, and a detachable fixing block 6 is provided on the open end to facilitate the installation of the sliding component 5 onto the slide rail 41.

[0034] The locking hole 121 is provided corresponding to one end of the first through hole 411. When the slider 52 slides to the closed end of the slide rail 41, one end of the locking member 51 can be engaged in the locking hole 121. The body of the locking member 51 is cylindrical. The end of the locking member 51 near the sleeve part 12 is provided with a hemispherical ball head 511. The maximum diameter of the ball head 511 is smaller than the diameter of the body of the locking member 51. The diameter of the locking hole 121 is larger than the maximum diameter of the ball head 511 and smaller than the diameter of the body of the locking member 51, so that the locking member 51 can be easily engaged or disengaged from the locking hole 121. It should be noted that the positional relationship between the telescopic rod 22 and the locking hole 121 determines whether the locking member 51 is engaged or disengaged from the locking hole 121. When the telescopic rod 22 and the locking hole 121 are misaligned, the telescopic rod 22 is usually in a stretched state, and the locking member 51 can be engaged in the locking hole 121. When the telescopic rod 22 and the locking hole 121 are aligned, the telescopic rod 22 is usually in a compressed state, and the locking member 51 is disengaged from the locking hole 121 due to the compression of the telescopic rod 22, and can then fasten the frame.

[0035] In one specific embodiment, a buffer component 7 is provided at the end of the connecting rod 42 away from the sliding component 5. The buffer component 7 is sleeved on the connecting rod 42. The end of the buffer component 7 near the sliding component 5 is fixed to the connecting rod 42. The end of the buffer component 7 away from the sliding component 5 is rotatably connected to the chassis 3 through a rotating shaft. A long strip-shaped second through hole 421 is provided at the end of the connecting rod 42 along the length direction. The rotating shaft passes through the second through hole 421. Specifically, the cushioning assembly 7 includes a first fixing member 71, a second fixing member 72, and a second spring member 73. The first fixing member 71 and the second fixing member 72 are arranged opposite to each other, and the second spring member 73 is disposed between the first fixing member 71 and the second fixing member 72. The second fixing member 72 is connected to the inner side of the chassis 3 via a rotating shaft. When the frame is in the open state, the rotating shaft abuts against the end of the second through hole 421 away from the sleeve part 422. In actual use, when the baby sits on the seat, the rotating shaft can slide towards the end of the sleeve part 422 relative to the second through hole 421, and the second spring member 73 is compressed, thereby achieving a cushioning effect and improving the baby's riding comfort. The rotating shaft is made of a second rivet.

[0036] In one specific embodiment, a seat fixing frame 8 is fitted to the upper side of the upper frame 1. The seat fixing frame 8 is adapted to the shape of the upper frame 1 and is used to install components such as seats. When the upper frame 1 is fastened to the chassis 3, the lower side of the upper frame 1 is fitted to the upper side of the chassis 3, thereby achieving the purpose of minimizing the volume when the frame is fastened.

[0037] The process of the frame from fastening to use is as follows: As the handle telescopic rod 2 is stretched and lifted upwards, the sliding component 5 gradually slides towards the closed end along the slide rail 41. When the sliding component 5 slides to the closed end, the telescopic rod 22 is stretched further, so that the telescopic rod 22 is misaligned with the locking hole 121. At this time, the locking piece 51 is engaged in the locking hole 121 to lock the position of the sliding component 5, thereby limiting the opening angle of the upper frame 1 relative to the chassis 3, and the frame can be used normally. The process of the frame from use to fastening is as follows: The telescopic rod 22 is compressed. As the telescopic rod 22 gradually covers the locking hole 121, the locking piece 51 gradually exits from the locking hole 121. The sliding component 5 gradually slides towards the open end along the slide rail 41. When the upper frame 1 is fastened to the chassis 3, the frame is fastened.

[0038] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A stroller frame, characterized in that, The vehicle includes an upper frame (1), a handlebar telescopic rod (2), a chassis (3), and a folding structure (4). The upper frame (1) includes a crossbeam (11) and a sleeve (12) extending from both ends of the crossbeam (11) and perpendicular to the crossbeam (11). One side of the crossbeam (11) is hinged to one side of the chassis (3). The telescopic rod (22) of the handlebar telescopic rod (2) is slidably fitted inside the sleeve (12). The folding structure (4) includes a slide rail (41), a sliding component (5), and a connecting rod (42). The slide rail (41) is arranged along the length of the sleeve (12). The sliding component (5) is slidably connected to the slide rail (41). The two ends of the connecting rod (42) are rotatably connected to the sliding component (5) and the chassis (3), respectively. The sliding assembly (5) includes a retractable locking member (51). One end of the locking member (51) passes through the slide rail (41) and abuts against the sleeve (12). The sleeve (12) is provided with a locking hole (121) on the side corresponding to the locking member (51). When the telescopic rod (22) is misaligned with the locking hole (121) and the upper frame (1) and the chassis (3) are opened at a preset angle, the locking member (51) can be engaged in the locking hole (121) to restrict the sliding of the sliding assembly (5). When the telescopic rod (22) covers the locking hole (121), the locking member (51) exits the locking hole (121) to release the sliding restriction on the sliding assembly (5).

2. The stroller frame according to claim 1, characterized in that, The sliding component (5) further includes a slider (52), which includes an integrally formed snap-fit ​​part (521) and a connecting part (522). The snap-fit ​​part (521) is slidably snapped onto the slide rail (41), and the connecting part (522) is rotatably connected to one end of the connecting rod (42).

3. The stroller frame according to claim 2, characterized in that, The slide rail (41) has a closed end near the handle telescopic rod (2), and the other end of the slide rail (41) has an open end. A detachable fixing block (6) is provided on the open end.

4. The stroller frame according to claim 3, characterized in that, The slide rail (41) has a first through hole (411) along its length on the side corresponding to the locking member (51). The slider (52) has a receiving cavity (524) with an opening facing the slide rail (41). A first spring member (523) is provided in the receiving cavity (524). One end of the locking member (51) is located in the receiving cavity (524) and compresses the first spring member (523). The other end of the locking member (51) abuts against the sleeve part (12) through the first through hole (411). The locking hole (121) is provided corresponding to one end of the first through hole (411). When the slider (52) slides to the closed end of the slide rail (41), one end of the locking member (51) can be engaged in the locking hole (121).

5. The stroller frame according to claim 1, characterized in that, A buffer assembly (7) is provided at one end of the connecting rod (42) that is connected to the chassis (3). The buffer assembly (7) is sleeved on the connecting rod (42), and the end of the buffer assembly (7) near the sliding assembly (5) is fixed to the connecting rod (42). The other end of the buffer assembly (7) is rotatably connected to the chassis (3) through a rotating shaft. A long strip-shaped second through hole (421) is provided along the length direction at the end of the connecting rod (42) away from the sliding assembly (5), and the rotating shaft passes through the second through hole (421).

Images