Joint structure and stroller framework

Abstract

The utility model discloses a joint structure which is characterized in that a first joint seat is fixedly arranged on a first supporting rod, a second joint seat capable of rotating relative to the first joint seat is fixedly arranged on a second supporting rod, a third joint seat capable of rotating relative to the first joint seat is fixedly arranged on a third supporting rod, and an armrest seat capable of rotating relative to the first joint seat is further connected to the first joint seat. A first transmission part is arranged between the second joint seat and the third joint seat, a second transmission part capable of driving the armrest seat to rotate relative to the first joint seat when the second joint seat rotates relative to the first joint seat is further arranged between the second joint seat and the armrest seat, and the second transmission part comprises a second transmission piece; one end of the second transmission piece is hinged to the armrest base and deviates from the third axis, and the other end of the second transmission piece is hinged to the second joint base and deviates from the first axis. The utility model further discloses a stroller framework adopting the joint structure. The joint structure and the stroller framework are simple in structure and convenient to fold.

Description

Technical field

[0001] The utility model relates to a joint structure and also to a child stroller frame. [Background Technology]

[0002] Strollers have become an indispensable accessory for infants and young children as they grow. Strollers typically consist of a foldable frame and front armrests. To fold a stroller, users must first unlock the frame, fold it, then unlock and fold the front armrests, making the folding process quite complex.

[0003] Therefore, the present invention is just based on above deficiency and produces. [Utility Model Content]

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a joint structure with a simple structure and convenient folding.

[0005] The utility model also provides a child stroller frame with a simple structure. The child stroller frame adopts the above-mentioned joint structure, and is easy to fold.

[0006] The utility model is realized through the following technical solutions:

[0007] The foldable arm is connected to the second support rod and the second support rod is connected to the foldable arm by the hinge parts of the first and second supporting plates, and the hinge parts are connected to the foldable arm by the hinge parts of the first and second supporting plates.

[0008] The first transmission component includes a first transmission plate, one end of which is hinged on the third joint seat and deviates from the second axis, and the other end of which is hinged on the second joint seat and deviates from the first axis.

[0009] The locking device includes a locking rod that can slide in the first joint seat, the third joint seat is provided with a locking position that can engage or disengage with the locking rod, the third joint seat is also provided with a driving rod that can slide relative to it and push the locking rod out of the locking position, and the first joint seat is also provided with a reset spring that can push the locking rod to reset.

[0010] The third joint seat includes two pivot plates spaced apart from each other, the upper ends of the two pivot plates are fixedly connected to the third support rod, the second joint seat includes two pivot blocks spaced apart from each other, the lower ends of the two pivot blocks are fixedly connected to the second support rod, the first joint seat includes a pivot seat, the lower end of the pivot seat is fixedly connected to the first support rod, the pivot seat is provided with a mounting groove, the pivot plate and the pivot block are inserted into the mounting groove, the pivot plate and the pivot seat are hinged around the second axis, the pivot block and the pivot seat are hinged around the first axis, and the armrest seat is arranged on the outside of the pivot seat and is hinged around the third axis with the pivot seat.

[0011] The pivot block is provided with a clearance groove, the first transmission piece is located in the clearance groove, and the upper end of the first transmission piece is hinged to the pivot piece around the fourth axis, and the lower end of the first transmission piece is hinged to the pivot block around the fifth axis.

[0012] The locking position is arranged at the connection position of the third support rod and the pivot plate, the locking rod is passed through the two pivot plates and its upper end cooperates with the locking position, a locking block is provided on the locking rod near its lower end, the pivot plate and the pivot block are provided with a positioning wall that abuts against the locking block when the joint structure is in the expanded state, the locking rod is provided with a transverse axis, and the pivot plate and the pivot block are also provided with a notch that engages with the transverse axis when the joint structure is in the expanded state.

[0013] The pivot seat is provided with a linear guide hole for the transverse shaft to pass through, the first support rod is provided with a fixed seat, and the return spring is arranged between the fixed seat and the lower end of the locking rod.

[0014] The second support rod is fixedly connected to a fixing rod, the fixing rod is hinged to the pivot seat around the first axis, the fixing rod is located outside the pivot seat and is hinged to the lower end of the second transmission plate around the sixth axis, and the upper end of the second transmission rod is hinged to the armrest seat around the seventh axis.

[0015] The first transmission plate is rotatably connected to the pivot plate via a hinge shaft, and the pivot seat is provided with an arc-shaped guide groove for the hinge shaft to slide inside.

[0016] A child stroller frame includes the joint structure described above, wherein the lower end of the first support rod is fixedly connected to the front leg, the lower end of the front leg is provided with a front wheel, the lower end of the second support rod is fixedly connected to the rear leg, the lower end of the rear leg is provided with a rear wheel, the upper end of the third support rod is provided with a push rod, and the front armrest is detachably connected to the armrest seat.

[0017] Compared with the prior art, the present invention has the following advantages: when the joint structure of the present invention is folded, the third joint seat drives the third support rod to rotate relative to the first joint seat and rotate closer to the first support rod. At the same time, the third joint seat drives the second joint seat to rotate relative to the first joint seat through the first transmission component, and the second joint seat drives the second support rod to rotate relative to the first joint seat and rotate closer to the first support rod. In addition, during this process, the second joint seat drives the armrest seat to rotate and fold relative to the first joint seat through the second transmission plate. Therefore, it can be ensured that the armrest seat is linked during the process of the third support rod and the second support rod rotating and folding toward the first support rod. The entire joint structure is simple in structure and easy to fold. With the child stroller frame adopting the above-mentioned joint structure, when the third joint seat drives the push rod to rotate and move closer to the front leg, the third joint seat drives the second joint seat to rotate relative to the first joint seat, so that the rear leg also rotates and moves closer to the front leg. During this process, the second joint seat drives the armrest seat to rotate through the second transmission plate, so that the front armrest on the armrest seat also moves closer to the front leg and folds. The entire stroller frame has a simple structure, and the front armrest is linked during the folding process, without the need to unlock the front armrest separately, making the stroller frame folding operation convenient and quick, and the size after folding is also small, making it easy to carry.

Brief Description of the Drawings

[0018] Figure 1 This is one of the three-dimensional diagrams of the joint structure of the utility model;

[0019] Figure 2 This is the second three-dimensional diagram of the joint structure of the utility model;

[0020] Figure 3 This is one of the side views of the joint structure of the utility model;

[0021] Figure 4 This is the second side view of the joint structure of the utility model;

[0022] Figure 5 This is an exploded view of the joint structure of the utility model;

[0023] Figure 6 This is one of the cross-sectional views of the joint structure of the utility model;

[0024] Figure 7 This is the second cross-sectional view of the joint structure of the utility model;

[0025] Figure 8It is a three-dimensional diagram of the components of the frame of the child stroller of the present invention;

[0026] Figure 9 This is a diagram of the folded state of the components of the child stroller frame of the present invention;

[0027] Figure 10 It is a three-dimensional diagram of the frame of the child stroller of the present invention. [Specific implementation method]

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figures 1 to 7As shown, a joint structure can be moved from the unfolded position to the folded position after the locking device is unlocked, including a first support rod 11, a second support rod 21 and a third support rod 31, the first support rod 11 is fixed with a first joint seat 12, the second support rod 21 is fixed with a second joint seat 22 that can rotate relative to the first joint seat 12 around a first axis A, the third support rod 31 is fixed with a third joint seat 32 that can rotate relative to the first joint seat 12 around a second axis B, the first joint seat 12 is also connected to an armrest seat 4 that can rotate relative to it around a third axis C, the second joint seat 22 and the third joint seat 3 2 is provided between the third joint seat 32 and the first joint seat 12, which can drive the second joint seat 22 to rotate relative to the first joint seat 12. A first transmission component 5 is provided between the second joint seat 22 and the armrest seat 4, which can drive the armrest seat 4 to rotate relative to the first joint seat 12 when the second joint seat 22 rotates relative to the first joint seat 12. The second transmission component 6 includes a second transmission plate 62, one end of the second transmission plate 62 is hinged to the armrest seat 4 and deviates from the position of the third axis C, and the other end of the second transmission plate 62 is hinged to the second joint seat 22 and deviates from the position of the first axis A. When folding, the third joint seat 32 rotates about the second axis B relative to the first joint seat 12, so that the third support rod 31 moves closer to the first support rod 11. During the rotation process, the third joint seat 32 drives the second joint seat 22 to rotate about the first axis A relative to the first joint seat 12 through the first transmission component 5, so that the second support rod 21 also moves closer to the first support rod 11. Moreover, in the process of the second support rod 21 moving closer to the first support rod 11, the second joint seat 22 also rotates with the second transmission plate 62 to pull the second transmission plate 62 to move. The second transmission plate 62 pulls the armrest seat 4 to rotate about the third axis C relative to the first joint seat 12, so that the armrest seat 4 also rotates to its folded position relative to the first joint seat 12. When the front armrest 8 is connected to the armrest seat 4, the front armrest 8 can also move closer to the first support rod 11. Therefore, the entire joint structure is simple in structure. When the third support rod 31 and the second support rod 21 rotate toward the first support rod 11, they can also drive the armrest seat 4 to rotate to the folded position, thereby realizing the linkage of the armrest seat 4. The folding operation is simple and quick, making the child stroller frame equipped with this joint structure also easy to fold.

[0030] like Figures 5 to 7As shown, the first transmission component 5 includes a first transmission plate 51, one end of which is hinged to the third joint seat 32 and offset from the second axis B. The other end of the first transmission plate 51 is hinged to the second joint seat 22 and offset from the first axis A. When the third joint seat 32 rotates relative to the first joint seat 12, the third joint seat 32 drives one end of the first transmission plate 51 to move, and the other end of the first transmission plate 51 pulls the second joint seat 22, causing the second joint seat 22 to rotate relative to the first joint seat 12 about the first axis A. This, in turn, causes the third support rod 31 to move toward the first support rod and also causes the second support rod 21 to move toward the first support rod 11. The entire transmission mechanism is simple, compact, and flexible to retract.

[0031] like Figure 5 and Figure 7 As shown, the locking device includes a locking rod 71 that can slide in the first joint seat 12, a locking position 72 that can engage or disengage with the locking rod 71 is provided in the third joint seat 32, and a driving rod 73 that can slide relative to the third joint seat 32 to push the locking rod 71 out of the locking position 72 is also provided in the third joint seat 32. The first joint seat 12 is also provided with a reset spring 74 that can push the locking rod 71 back to its original position. When the driving rod 73 slides downward, the locking rod 71 is pushed out of the locking position 72. At this time, the third joint seat 32 can rotate relative to the first joint seat 12, and the entire unlocking operation is very convenient and fast. After the child stroller frame adopts this joint structure, the driving rod 73 is first slid when the child stroller frame is folded to achieve unlocking. The traditional structure can be used to use a pull rope or rod-shaped component to hit the driving rod 73 to slide, which will not be described in detail here.

[0032] like Figures 5 to 7 As shown, the third joint seat 32 includes two spaced-apart pivot plates 321, the upper ends of which are fixedly connected to the third support rod 31. The second joint seat 22 includes two spaced-apart pivot blocks 221, the lower ends of which are fixedly connected to the second support rod 21. The first joint seat 12 includes a pivot seat 121, the lower end of which is fixedly connected to the first support rod 11. The pivot seat 121 is provided with a mounting slot 122, into which the pivot plates 321 and pivot blocks 221 are inserted. The pivot plates 321 and pivot blocks 221 are hingedly connected to the pivot seat 121 about the second axis B, and the pivot blocks 221 are hingedly connected to the pivot seat 121 about the first axis A. The armrest seat 4 is disposed outside the pivot seat 121 and hingedly connected to the pivot seat 121 about the third axis C. Therefore, the entire joint structure is simple and compact, and the folding or unfolding action is smooth and reliable.

[0033] like Figure 5 and Figure 6As shown, a clearance groove 222 is provided on the pivot block 221, the first transmission plate 51 is located in the clearance groove 222, and the upper end of the first transmission plate 51 is hinged to the pivot plate 321 around the fourth axis D, and the lower end of the first transmission plate 51 is hinged to the pivot block 221 around the fifth axis E.

[0034] like Figure 5 and Figure 7 As shown, the latching position 72 is located at the junction of the third support rod 31 and the pivoting piece 321. The locking rod 71 is disposed between the two pivoting pieces 321, and its upper end cooperates with the latching position 72. A locking block 75 is provided on the locking rod 71 near its lower end. The pivoting piece 321 and the pivoting block 221 are provided with a positioning wall 76 that abuts the latching block 75 when the joint structure is in the deployed state. The locking rod 71 is provided with a transverse axis 77. The pivoting piece 321 and the pivoting block 221 are also provided with a notch 79 that engages with the transverse axis 77 when the joint structure is in the deployed state. When the locking rod 71 engages with the latching position 72, the transverse axis 77 engages with the notch 79, and the latching block 75 abuts against the positioning wall 75. This achieves multiple locking and positioning when the joint structure is in the deployed state, ensuring the stability of the deployed state.

[0035] like Figure 5 and Figure 6 As shown, the pivot seat 121 is provided with a linear guide hole 123 for the transverse shaft 77 to pass through, thereby allowing smooth sliding of the locking rod 71. The first support rod 11 is provided with a fixed seat 78, and the return spring 74 is provided between the fixed seat 78 and the lower end of the locking rod 71.

[0036] like Figure 2 、 Figure 4 and Figure 5 As shown, the second support rod 21 is fixedly connected to a fixing rod 25, which is hinged to the pivot seat 121 about a first axis A. The fixing rod 25 is located outside the pivot seat 121 and is hinged to the lower end of the second transmission plate 62 about a sixth axis F. The upper end of the second transmission rod 62 is hinged to the armrest seat 4 about a seventh axis G. When the second support rod 21 is rotated and folded relative to the first support rod 11, the upper end of the fixing rod 25 pulls the second transmission plate 62 to move, thereby causing the second transmission plate 62 to pull the armrest seat 4 to rotate.

[0037] like Figure 7 The first transmission plate 51 is rotatably connected to the pivot plate 321 via the hinge shaft 52 , and the pivot seat 121 is provided with an arc-shaped guide groove 124 for the hinge shaft 52 to slide inside, so that the third joint seat 32 can rotate smoothly.

[0038] like Figures 1 to 10As shown, a child stroller frame includes the joint structure as described above, the lower end of the first support rod 11 is fixedly connected to the front leg 13, the lower end of the front leg 13 is provided with a front wheel 14, the lower end of the second support rod 21 is fixedly connected to the rear leg 23, the lower end of the rear leg 23 is provided with a rear wheel 24, the upper end of the third support rod 31 is provided with a push rod 33, and the front armrest 8 is detachably connected to the armrest seat 4. When the stroller frame is folded, the driving rod 73 is first slid to push the locking rod 71 to unlock it, and then the hand push rod 33 is rotated backward, and the hand push rod 33, the third support rod 31 and the third joint seat 32 are rotated relative to the first joint seat 12. At the same time, the rear leg 23, the second support rod 21 and the second joint seat 21 are driven to rotate relative to the first joint seat 12 through the first transmission component 5. During this process, the second joint seat 22 drives the armrest seat 4 to rotate relative to the first joint seat 12 through the second transmission plate 62, so that the hand push rod 33 and the rear leg 23 rotate and move closer to the front leg 13, while driving the front armrest 8 to move closer to the front leg 13, thereby realizing the folding of the stroller frame. When folding, the front armrest 8 is linked, and no separate unlocking operation is required. The folding operation of the stroller frame is very convenient and quick.

[0039] The embodiment is described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiment. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the present invention.

Claims

1. A joint structure capable of moving from an unfolded position to a folded position after a locking device is unlocked, characterized in that: The invention comprises a first support rod (11), a second support rod (21) and a third support rod (31), wherein a first joint seat (12) is fixedly provided on the first support rod (11), a second joint seat (22) is fixedly provided on the second support rod (21) and can rotate relative to the first joint seat (12) around a first axis (A), a third joint seat (32) is fixedly provided on the third support rod (31) and can rotate relative to the first joint seat (12) around a second axis (B), an armrest seat (4) is further connected to the first joint seat (12) and can rotate relative to the first joint seat (12) around a third axis (C), a support is provided between the second joint seat (22) and the third joint seat (32) and relative to the third joint seat (32) A first transmission component (5) is provided between the second joint seat (22) and the armrest seat (4), which is capable of driving the second joint seat (22) to rotate relative to the first joint seat (12) when the first joint seat (12) rotates. A second transmission component is also provided between the second joint seat (22) and the armrest seat (4), which is capable of driving the armrest seat (4) to rotate relative to the first joint seat (12) when the second joint seat (22) rotates relative to the first joint seat (12). The second transmission component (6) includes a second transmission plate (62). One end of the second transmission plate (62) is hinged to the armrest seat (4) and deviates from the position of the third axis (C). The other end of the second transmission plate (62) is hinged to the second joint seat (22) and deviates from the position of the first axis (A).

2. The joint structure according to claim 1, wherein: The first transmission component (5) includes a first transmission plate (51), one end of the first transmission plate (51) is hinged on the third joint seat (32) and deviates from the position of the second axis (B), and the other end of the first transmission plate (51) is hinged on the second joint seat (22) and deviates from the position of the first axis (A).

3. The joint structure according to claim 2, wherein: The locking device includes a locking rod (71) that can slide in the first joint seat (12), a locking position (72) that can engage with or disengage the locking rod (71) is provided in the third joint seat (32), a driving rod (73) that can slide relative to the third joint seat (32) and push the locking rod (71) out of the locking position (72) is also provided in the third joint seat (32), and a reset spring (74) that can push the locking rod (71) to reset is also provided in the first joint seat (12).

4. The joint structure according to claim 3, characterized in that: The third joint seat (32) includes two mutually spaced pivot plates (321), the upper ends of the two pivot plates (321) are fixedly connected to the third support rod (31), the second joint seat (22) includes two mutually spaced pivot blocks (221), the lower ends of the two pivot blocks (221) are fixedly connected to the second support rod (21), the first joint seat (12) includes a pivot seat (121), the lower end of the pivot seat (121) is fixedly connected to the first support rod (11), The pivot seat (121) is provided with a mounting groove (122), the pivot plate (321) and the pivot block (221) are inserted into the mounting groove (122), the pivot plate (321) and the pivot seat (121) are hinged around the second axis (B), the pivot block (221) and the pivot seat (121) are hinged around the first axis (A), and the armrest seat (4) is provided on the outside of the pivot seat (121) and is hinged to the pivot seat (121) around the third axis (C).

5. The joint structure according to claim 4, characterized in that: The pivot block (221) is provided with a clearance groove (222), the first transmission plate (51) is located in the clearance groove (222), and the upper end of the first transmission plate (51) is hinged to the pivot plate (321) around a fourth axis (D), and the lower end of the first transmission plate (51) is hinged to the pivot block (221) around a fifth axis (E).

6. The joint structure according to claim 4, wherein: The latching position (72) is arranged at the connection position between the third support rod (31) and the pivot plate (321), the locking rod (71) is passed through the two pivot plates (321) and the upper end thereof cooperates with the latching position (72), a locking block (75) is provided on the locking rod (71) and near its lower end, the pivot plate (321) and the pivot block (221) are provided with a positioning wall (76) which abuts against the locking block (75) when the joint structure is in the expanded state, the locking rod (71) is provided with a transverse axis (77), and the pivot plate (321) and the pivot block (221) are also provided with a notch (79) which engages with the transverse axis (77) when the joint structure is in the expanded state.

7. The joint structure according to claim 5, characterized in that: The pivot seat (121) is provided with a linear guide hole (123) for the transverse shaft (77) to pass through, the first support rod (11) is provided with a fixed seat (78), and the return spring (74) is provided between the fixed seat (78) and the lower end of the locking rod (71).

8. The joint structure according to claim 4, wherein: The second support rod (21) is fixedly connected to a fixing rod (25), and the fixing rod (25) is hinged to the pivot seat (121) around a first axis (A). The fixing rod (25) is located outside the pivot seat (121) and is hinged to the lower end of the second transmission plate (62) around a sixth axis (F). The upper end of the second transmission plate (62) is hinged to the armrest seat (4) around a seventh axis (G).

9. The joint structure according to claim 4, characterized in that: The first transmission plate (51) is rotatably connected to the pivot plate (321) via a hinge shaft (52), and the pivot seat (121) is provided with an arc-shaped guide groove (124) for the hinge shaft (52) to slide inside.

10. A child stroller frame, characterized by: The invention comprises the joint structure according to any one of claims 1 to 9, wherein the lower end of the first support rod (11) is fixedly connected to the front leg (13), the lower end of the front leg (13) is provided with a front wheel (14), the lower end of the second support rod (21) is fixedly connected to the rear leg (23), the lower end of the rear leg (23) is provided with a rear wheel (24), the upper end of the third support rod (31) is provided with a push rod (33), and the front armrest (8) is detachably connected to the armrest seat (4).

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