Linked child's pushchair structure

Abstract

The utility model discloses a kind of linkage's children's pushchair structure, including frame and seat frame, the frame includes joint group, front leg pipe group, rear leg pipe group and handle pipe group;The joint group includes mutually rotating inner joint, middle joint and outer joint, the front leg pipe group is connected with inner joint, the middle joint is connected with rear leg pipe;The outer joint is connected with handle pipe;The joint group is equipped with first locking device to lock when the frame is unfolded, and the rotation of front leg pipe group, rear leg pipe group and handle pipe group is locked, the front of seat frame is rotatably installed in front leg pipe group, the rear end of seat frame is pivotally connected with rear leg pipe group and handle pipe group respectively by connecting rod assembly;When first locking device is unlocked, the frame is folded simultaneously, and the frame drives seat frame to fold by connecting rod assembly.In switching from folding state to unfolded state, the connecting rod assembly is driven by frame to unfold seat frame, realizes mutual linkage.

Description

Technical Field

[0001] This utility model relates to the field of children's vehicles, and in particular to a linked children's stroller structure. Background Technology

[0002] Baby strollers are transportation tools specifically designed for infants and toddlers, and are also an important auxiliary product in mother and baby shopping scenarios. One problem with existing strollers is that the seat frame needs to be folded separately before the frame can be folded; the two cannot be folded together.

[0003] Of course, there are also existing structures that use a linkage structure, but the frame and chassis need to be set with locking structures to achieve rotational locking when unfolded, which makes the structure more complicated. Utility Model Content

[0004] The main purpose of this invention is to propose a linked stroller structure, which aims to improve the existing frame and seat frame structure, thereby achieving linkage between the two, and making the structure simple and stable.

[0005] To achieve the above objectives, this utility model proposes a linked children's stroller structure, comprising:

[0006] The frame includes a joint assembly, a front leg tube assembly, a rear leg tube assembly, and a handlebar tube assembly;

[0007] The joint assembly includes an inner joint, a middle joint, and an outer joint that rotate relative to each other; the front leg tube assembly is connected to the inner joint; the middle joint is connected to the rear leg tube; and the outer joint is connected to the handle tube.

[0008] A seat frame, the front of which is rotatably mounted to the front leg tube assembly, and the rear of which is pivotally connected to the rear leg tube assembly and the handlebar assembly via a linkage assembly.

[0009] The joint assembly is provided with a first locking device to lock the frame when it is deployed and to lock the rotation between the inner and outer joints. The middle joint is locked to the joint assembly by a first locking member or by a linkage assembly.

[0010] And lock the rotation of the front leg tube assembly, rear leg tube assembly and handle tube assembly;

[0011] When the first locking device is unlocked, the frame folds down while the seat frame folds down via the linkage assembly.

[0012] The difference from the existing design is that the linkage assembly enables the handlebar tubes and rear leg tubes to fold together when the frame is folded, which in turn drives the seat frame to fold together with the front leg tube assembly as the fulcrum. This achieves the linkage between the frame and the seat frame, making the structure simpler and more convenient to use.

[0013] At the same time, when switching from the folded state to the unfolded state, the frame drives the linkage assembly to drive the seat frame to unfold, realizing mutual linkage.

[0014] The linkage includes the linkage between the frame and the seat frame when folded, as well as the linkage when unfolded. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0016] Figure 2 This is a half-sectional view of the present invention. Figure 1 ;

[0017] Figure 3 This is a half-sectional view of the present invention. Figure 2 ;

[0018] Figure 4 This is a schematic diagram of the semi-folded version of this utility model;

[0019] Figure 5 This is a schematic diagram of the rocker arm section;

[0020] Figure 6 This is a schematic diagram of the switching mechanism of this utility model;

[0021] Figure 7 This is a schematic diagram of a partial structure.

[0022] In the picture,

[0023] 1. Frame; 11. Front leg tube assembly; 12. Rear leg tube assembly; 13. Handlebar tube assembly;

[0024] 2. Joint group; 21. Internal joint; 22. External joint; 23. Middle joint; 24. Linkage joint;

[0025] 3. Seat frame; 31. Armrest tube; 32. Backrest tube;

[0026] 41. First connecting rod; 42. First pivot;

[0027] 5. Rocker arm; 51. Limiting ramp; 52. Stop;

[0028] 61. First crank; 62. Second crank; 63. Third crank;

[0029] 71. Support frame; 72. Curved part; 73. Protrusion;

[0030] 8. Second pivot;

[0031] 9. Second link. Detailed Implementation

[0032] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0033] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0035] like Figures 1 to 6 As shown, a linked children's stroller structure includes:

[0036] The frame includes a joint assembly, a front leg tube assembly, a rear leg tube assembly, and a handlebar tube assembly;

[0037] The joint assembly includes an inner joint, a middle joint, and an outer joint that rotate relative to each other; the front leg tube assembly is connected to the inner joint; the middle joint is connected to the rear leg tube; and the outer joint is connected to the handle tube.

[0038] A seat frame, the front of which is rotatably mounted to the front leg tube assembly, and the rear of which is pivotally connected to the rear leg tube assembly and the handlebar assembly via a linkage assembly.

[0039] The joint assembly is provided with a first locking device to lock the frame when it is deployed and to lock the rotation between the inner and outer joints. The middle joint is locked to the joint assembly by a first locking member or by a linkage assembly.

[0040] And lock the rotation of the front leg tube assembly, rear leg tube assembly and handle tube assembly;

[0041] When the first locking device is unlocked, the frame folds down while the seat frame folds down via the linkage assembly.

[0042] In the first embodiment, when in the unfolded state, the middle joint and the joint assembly are locked together by a first locking device; at this time, the linkage assembly mainly plays a linkage role, namely folding linkage and unfolding linkage.

[0043] In the second embodiment, when in the unfolded state, the middle joint and the joint assembly are rotatable (the middle joint can rotate freely regardless of whether it is in the unfolded or folded state).

[0044] At this point, the linkage assembly provides support, forming a stable triangular support structure around the rear joint, seat frame, and front leg tubes, thereby enabling coordinated unfolding and locking (the first locking device at this point mainly locks the outer and inner joints). Simultaneously, the linkage assembly also plays a role in coordinated folding during folding.

[0045] The difference from the existing design is that the handlebar tubes and rear leg tubes are folded together by the linkage assembly, which drives the seat frame 3 to fold together with the front leg tube assembly 11 as the fulcrum. This achieves the linkage between the frame 1 and the seat frame 3, making the structure simpler and more convenient to use.

[0046] At the same time, when switching from the folded state to the unfolded state, the frame 1 drives the linkage assembly to drive the seat frame 3 to unfold, realizing mutual linkage.

[0047] Specifically, a first pivot 42 is provided between the two sides of the front leg tube assembly 11 and the seat frame 3, wherein the front leg tube assembly 11 includes two spaced-apart front leg tubes, which swing around the first pivot 42 as a fulcrum.

[0048] In this embodiment of the utility model, the linkage assembly includes a first linkage 41. One end of the first linkage 41 is directly or indirectly pivotally connected to the inner joint 21, and the other end of the first linkage 41 is pivotally connected to the middle of the seat frame 3. That is, when the front leg tube swings, it drives the seat frame 3 to move in conjunction.

[0049] Specifically, the outer joint 22 is rotatably mounted with a handrail tube 31, and the handrail tube 31 extends toward the axial direction of the inner joint 21 with a rocker arm 5;

[0050] The rocker arm 5 is pivotally connected to one end of the first connecting rod 41;

[0051] The rocker arm 5 is provided with a limiting inclined surface 51 that abuts against the end wall of the first connecting rod 41. The limiting inclined surface 51 is used to abut against the end of the first connecting rod 41, thereby realizing the swing limit of the first connecting rod 41 and the limit when it is unfolded.

[0052] When the foot tube is folded or unfolded, the armrest tube 31 is unfolded or folded by the linkage between the rocker arm 5 and the first connecting rod 41.

[0053] In this embodiment of the invention, the inner sidewall of the inner joint 21 is provided with an axially extending stop 52.

[0054] When in the unfolded state, the side wall of the rocker arm 5 abuts against the rod, thereby limiting the rocker arm 5 and the first connecting rod 41.

[0055] Specifically, the linkage assembly further includes a first crank 61, a second crank 62, and a third crank 63 that are rotatably connected in sequence;

[0056] The joint assembly 2 also includes a linkage joint 24, which is rotatably disposed between the middle joint 23 and the inner joint 21.

[0057] The linkage joint 24 is provided with a backrest tube 32, which is locked or unlocked with the joint assembly by a second locking device. The backrest tube can be adjusted in direction to achieve orientation adjustment.

[0058] One end of the first crank 61 is pivotally connected to the linkage joint 24 or the backrest tube 32; the end of the third crank 63 is pivotally connected to the second pivot at the rear of the seat frame 3.

[0059] A first pendulum shaft 81 is provided between the first crank 61 and the second crank 62, and a second pendulum shaft 82 is provided between the second crank 62 and the third crank 63;

[0060] A second connecting rod 9 is provided near the first pivot axis of the first crank rod 61. The two ends of the second connecting rod are rotatably connected to the inner side of the first crank rod and the second pivot axis of the third crank rod 63, respectively.

[0061] In the actual design, the seat tube and handlebar tube assembly 13 are parallel, thus realizing mutual linkage. At the same time, the linkage locking or linkage unlocking of the linkage joint 24 also realizes the linkage of multiple structures.

[0062] In this embodiment of the utility model, the connecting rod assembly is provided in two sets, and a support frame 71 is provided between the two second swing shafts. The support frame 71 is fixed to the second crank 62, thereby realizing linkage support.

[0063] Specifically, the support frame 71 is arc-shaped and extends into the lower rear wall of the seat frame 3 when unfolded. When unfolded, it functions like a rocker arm, causing the rear of the seat frame 3 to tilt upwards, thus triggering a linkage mechanism.

[0064] In this embodiment of the utility model, the first crank, the second crank, and the third crank are arc-shaped, but they can also be straight structures to achieve the same function, namely linkage. Of course, the design can be customized according to actual needs.

[0065] Specifically, the inner side of the first crank is provided with an arc-shaped groove 72. In the unfolded state, the inner joint 21 has a protrusion 73 extending radially, and the protrusion 73 abuts against the arc-shaped groove 72. The protrusion 73 can be integrally formed with the inner joint 21, or it can be a separate protrusion 73, thereby limiting the position of the first crank.

[0066] A limiting structure is also provided between the backrest tube and the handle tube assembly to limit the swing angle.

[0067] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A linked child's pushchair structure characterised in that, include: The frame includes a joint assembly, a front leg tube assembly, a rear leg tube assembly, and a handlebar tube assembly; The joint assembly includes an inner joint, a middle joint, and an outer joint that rotate relative to each other; the front leg tube assembly is connected to the inner joint; the middle joint is connected to the rear leg tube; and the outer joint is connected to the handle tube. A seat frame, the front of which is rotatably mounted to the front leg tube assembly, and the rear of which is pivotally connected to the rear leg tube assembly and the handlebar assembly via a linkage assembly. The joint assembly is equipped with a first locking device to lock the frame when it is deployed, and to lock the rotation between the inner and outer joints. The middle joint is locked to the joint assembly by a first locking member or by a linkage assembly; And lock the rotation of the front leg tube assembly, rear leg tube assembly and handle tube assembly; When the first locking device is unlocked, the frame folds down while the seat frame folds down via the linkage assembly.

2. The linked stroller structure of claim 1, wherein: A first pivot is provided between the front leg tube assembly and the two sides of the seat frame.

3. The linked stroller structure of claim 1, wherein: The linkage assembly includes a first link, one end of which is directly or indirectly pivotally connected to the inner joint, and the other end of which is pivotally connected to the middle of the seat frame.

4. The linked stroller structure as described in claim 3, characterized in that: The outer joint is rotatably mounted with a handrail tube, and the handrail tube extends toward the axis of the inner joint with a rocker arm. The rocker arm is pivotally connected to one end of the first connecting rod; The rocker arm is provided with a limiting inclined surface that abuts against the end wall of the first connecting rod.

5. The linked stroller structure of claim 4, wherein: The inner wall of the internal joint is provided with an axially extending stop. When in the deployed state, the sidewall of the rocker arm abuts against the rod.

6. The linked stroller structure of claim 1, wherein: The linkage assembly also includes a first crank, a second crank, and a third crank that are rotatably connected in sequence. The joint assembly also includes a linkage joint, which is rotatably disposed between the middle joint and the inner joint and is locked or unlocked to the joint assembly by a second locking device. The linkage joint is equipped with a backrest tube; One end of the first crank is pivotally connected to a linkage joint or backrest tube; the end of the third crank is pivotally connected to a second pivot at the rear of the seat frame. A first pendulum shaft is provided between the first and second cranks, and a second pendulum shaft is provided between the second and third cranks; A second connecting rod is provided near the first crank shaft, and the two ends of the second connecting rod are respectively rotatably connected to the inner side of the first crank shaft and the second rotating shaft of the third crank shaft.

7. The linked stroller structure of claim 6, wherein: The connecting rod assembly has two sets, and a support frame is provided between the two second swing shafts. The support frame is fixed to the second crank.

8. The linked stroller structure of claim 7, wherein: The support frame is arc-shaped and extends into the lower wall of the rear of the seat frame when unfolded.

9. The linked stroller structure of claim 6, wherein: The first, second, and third cranks are arc-shaped.

10. The linked stroller structure as described in claim 6, characterized in that: The inner side of the first crank is provided with an arc-shaped groove. In the unfolded state, the inner joint has a protrusion extending radially, and the protrusion abuts against the arcuate groove; A limiting structure is also provided between the backrest tube and the handle tube assembly.

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