CN220262868U - Joint structure of children handcart and children handcart - Google Patents

Abstract

The utility model discloses a child handcart joint structure and a child handcart, and in particular relates to the technical field of the child handcart, the child handcart joint structure comprises a joint assembly, wherein the joint assembly comprises an outer joint, an inner joint with one end arranged in the middle of the outer joint, an inner rotating arm arranged on the side surface of the outer joint and an outer rotating arm arranged on the side surface of the inner rotating arm, and the outer joint, the inner rotating arm and the outer rotating arm are rotationally connected through a rotating shaft; the joint assembly further includes a locking member for locking the outer joint, the inner swing arm and the outer swing arm, and a transmission member for transmitting power between the outer joint and the outer swing arm. According to the utility model, the front wheel assembly, the rear wheel assembly, the seat assembly and the handle assembly are arranged on the joint assembly through the arrangement of the joint assembly, and the linkage actions of all parts are controlled through the joint assembly, so that the purpose of the children handcart can be realized by one step.

Description

Joint structure of children handcart and children handcart

Technical Field

The utility model relates to the technical field of children's trolleys, in particular to a joint structure of a children's trolley and the children's trolley.

Background

A child cart refers to a portable seat for use by infants to propel the infant indoors or outdoors for walking or rest. The child cart provides a safe and convenient way to carry the infant through outdoor activities such as walking, shopping or traveling. Child strollers are generally composed of front and rear wheel structures, seats, handles, and the like, with some child strollers also having additional functions such as a canopy, storage basket, or tray for holding infant products, toys, or food. In general, a child cart has a folding function to reduce occupied space, and is very convenient when not in use or when carried.

The existing folding steps of the children handcart are complex, mainly because of the problem of folding structural design, usually the front wheel structure is used as a reference, and the rear wheel structure, the seat, the handle and other structures are independently arranged on the front wheel structure by adopting a locking structure, so that each part needs to be operated and folded during folding, and the complexity of the folding steps is greatly improved.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a joint structure of a child handcart and the child handcart, and solves the problem of more folding steps of the child handcart in the prior art by designing a linkage folding structure.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the joint assembly comprises an outer joint, an inner joint with one end arranged in the middle of the outer joint, an inner rotating arm arranged on the side surface of the outer joint and an outer rotating arm arranged on the side surface of the inner rotating arm, wherein the outer joint, the inner rotating arm and the outer rotating arm are rotationally connected through a rotating shaft; the joint assembly further comprises a locking part for locking the outer joint, the inner rotating arm and the outer rotating arm, and a transmission part for transmitting power between the outer joint and the outer rotating arm; when the outer joint is folded, the outer joint drives the outer rotating arm to rotate and fold towards the direction of the inner joint through the transmission part after the outer joint, the inner rotating arm and the outer rotating arm are unlocked by the locking part, and the inner rotating arm rotates and folds towards the direction of the inner joint.

Preferably, the locking component comprises a sliding block which is arranged on the inner side of the inner joint in a sliding manner, the sliding block is reset through a spring, the bottom end of the sliding block is transversely and fixedly connected with a locking shaft, a sliding groove I is formed in the side face of the inner joint, the locking shaft penetrates through the sliding groove I, and when the sliding block is pressed, the locking shaft slides in the sliding groove I.

Preferably, the side of the outer joint is provided with a first arc groove, the bottom end of the first arc groove is provided with a first hook groove, the locking shaft penetrates through the first hook groove to lock the outer joint and the inner joint, and when the sliding block is pushed to unlock and fold, the locking shaft enters the arc groove and slides in the arc groove.

Preferably, the side surface of the inner rotating arm is provided with an avoidance groove, the bottom end of the avoidance groove is provided with a hook groove II, the locking shaft penetrates through the hook groove II to lock the inner joint and the inner rotating arm, and when the sliding block is pushed to unlock and fold, the locking shaft enters the avoidance groove and slides in the avoidance groove.

Preferably, the side surface of the outer rotating arm is provided with an eccentric groove II, one end of the eccentric groove II is provided with a hooking groove III, the locking shaft penetrates through the hooking groove III to lock the outer joint and the outer rotating arm, and when the sliding block is pushed to unlock and fold, the locking shaft enters the eccentric groove II and slides in the eccentric groove II.

Preferably, the side of the inner joint is provided with a sliding groove II, the side of the outer joint is provided with an eccentric groove I, one end of the eccentric groove I is close to the rotating shaft, the other end of the eccentric groove I is far away from the rotating shaft, the side of the outer rotating arm is provided with an eccentric groove III, one end of the eccentric groove III is close to the rotating shaft, the other end of the eccentric groove III is far away from the rotating shaft, the transmission part is a control shaft movably inserted into the sliding groove II, the eccentric groove I and the eccentric groove III, and when the locking part locks the outer joint and the outer rotating arm, the control shaft is simultaneously positioned at one ends of the eccentric groove I and the eccentric groove III far away from the rotating shaft.

Preferably, a fixing block is fixedly arranged at the edge of the side face of the outer joint, a second arc-shaped groove is formed in one side of the inner rotating arm, and the fixing block is located in the second arc-shaped groove and can slide in the second arc-shaped groove.

Preferably, a handle is mounted to the rear side of the joint assembly.

The utility model provides a children handcart, includes front wheel subassembly, rear wheel subassembly, seat subassembly, joint subassembly, handle subassembly, still includes foretell joint subassembly, and the handle subassembly is installed on outer joint, and front wheel subassembly is installed on the joint, and seat subassembly is installed on the inner rotating arm, and the rear wheel subassembly is installed on outer rotating arm.

Preferably, the handle assembly comprises a fixed rod and a movable rod inserted in the fixed rod, the fixed rod is arranged at the rear side of the outer joint, a sliding piece is movably arranged at the rear side of the outer joint, and the movable rod pushes the sliding piece to push the sliding block to unlock.

The utility model has the technical effects and advantages that:

1. according to the utility model, the front wheel assembly, the rear wheel assembly, the seat assembly and the handle assembly are arranged on the joint assembly through the arrangement of the joint assembly, and the linkage actions of all parts are controlled through the joint assembly, so that the purpose of the children handcart can be realized by one step, and the problem of more folding steps of the children handcart in the prior art is solved.

2. The handle can be pulled to operate when the child trolley is folded, so that labor is saved, and the handle can be used for operating when the child trolley is carried.

Drawings

Fig. 1 is a schematic view of the child stroller of the present utility model when deployed.

Fig. 2 is a schematic structural view of a joint assembly according to the present utility model.

Fig. 3 is a cross-sectional view of a joint assembly of the present utility model.

Fig. 4 is an exploded view of the joint assembly of the present utility model.

Fig. 5 is an exploded view of a second joint assembly of the present utility model.

Fig. 6 is a schematic view of the child stroller of the present utility model after being folded.

The reference numerals are:

1. a front wheel assembly; 2. a rear wheel assembly; 3. a seat assembly; 4. a joint assembly; 40. a rotating shaft; 41. an outer joint; 411. an arc-shaped groove I; 412. a first hooking groove; 413. an eccentric groove I; 414. a fixed block; 42. an inner joint; 421. a first chute; 422. a second chute; 43. an inner rotating arm; 431. an avoidance groove; 432. a second hooking groove; 433. an arc-shaped groove II; 44. an outer swivel arm; 441. an eccentric groove II; 442. a hook groove III; 443. eccentric groove III; 45. a locking member; 451. a slide block; 452. a spring; 453. a locking shaft; 46. a control shaft; 5. a handle assembly; 51. a fixed rod; 52. a movable rod; 53. a sliding member; 6. and (5) a handle.

Detailed Description

Examples

As shown in fig. 1 to 6, the present embodiment provides a joint structure of a child cart, comprising a joint assembly 4, wherein the joint assembly 4 comprises an outer joint 41, an inner joint 42 with one end arranged in the middle of the outer joint 41, an inner rotating arm 43 arranged on the side surface of the outer joint 41, and an outer rotating arm 44 arranged on the side surface of the inner rotating arm 43, and the outer joint 41, the inner joint 42, the inner rotating arm 43 and the outer rotating arm 44 are rotatably connected through a rotating shaft 40; the joint assembly 4 further includes a locking member 45 for locking the outer joint 41, the inner joint 42, the inner rotating arm 43 and the outer rotating arm 44, a transmission member for transmitting power between the outer joint 41 and the outer rotating arm 44; when the outer joint 41 is folded by rotating the outer joint 41 in the direction of the inner joint 42 after the outer joint 41, the inner joint 42, the inner rotating arm 43 and the outer rotating arm 44 are unlocked by the locking member 45, the outer joint 41 drives the outer rotating arm 44 to rotate in the direction of the inner joint 42 by the transmission member, and the inner rotating arm 43 rotates and folds freely in the direction of the inner joint 42.

The child cart itself includes a front wheel assembly 1, a rear wheel assembly 2, a seat assembly 3, a joint assembly 4, and a handle assembly 5, wherein the handle assembly 5 is mounted on an outer joint 41, the front wheel assembly 1 is mounted on an inner joint 42, the seat assembly 3 is mounted on an inner pivot arm 43, and the rear wheel assembly 2 is mounted on an outer pivot arm 44.

Then, at the time of deployment, the outer joint 41, the inner joint 42, the inner rotating arm 43 and the outer rotating arm 44 are locked together by the locking member 45, so that the relative positions of the front wheel assembly 1, the rear wheel assembly 2, the seat assembly 3 and the handle assembly 5 are kept fixed. When the folding is performed, the locking member 45 is used for unlocking, and the handle assembly 5 is rotated in the counterclockwise direction in the direction of fig. 1 by taking the front wheel assembly 1 as a reference, so that the outer joint 41 can drive the outer rotating arm 44 through the transmission member to rotate the rear wheel assembly 2 clockwise towards the front wheel assembly 1, and the inner rotating arm 43 is rotated downwards to fold under the action of the gravity of the seat assembly 3, so that the folding can be completed completely. Through the setting of joint subassembly 4, install front wheel subassembly 1, rear wheel subassembly 2, seat subassembly 3, handle subassembly 5 on joint subassembly 4, control the linkage action of each part through joint subassembly 4, realize just can be with the purpose of children handcart one step, solved the folding step problem many of children handcart among the prior art.

In this embodiment, the locking member 45 includes a sliding block 451 slidably disposed inside the inner joint 42, the sliding block 451 is reset by a spring 452, a locking shaft 453 is fixedly connected to a bottom end of the sliding block 451 in a lateral direction, a first sliding slot 421 is formed in a side surface of the inner joint 42, the locking shaft 453 passes through the first sliding slot 421, and when the sliding block 451 is pressed, the locking shaft 453 slides inside the first sliding slot 421.

Further, the side surface of the outer joint 41 is provided with a first arc slot 411, the bottom end of the first arc slot 411 is provided with a first hook slot 412, and the locking shaft 453 penetrates through the first hook slot 412 to lock the outer joint 41 and the inner joint 42, and when the sliding block 451 is pushed to unlock for folding, the locking shaft 453 enters the first arc slot 411 and slides in the first arc slot.

It should be noted that, as shown in fig. 4, when the locking shaft 453 is locked, the locking shaft 453 is tightly attached to the side wall of the first hook slot 412, and when the locking is unlocked, the pushing slider 451 can drive the locking shaft 453 to slide in the first slide slot 421 and make the locking shaft 453 enter the first arc slot 411 from the first hook slot 412, so that the locking shaft 453 can slide in the first arc slot 411, that is, the outer joint 41 and the inner joint 42 can rotate relatively, so as to achieve the purpose of unlocking.

Further, the side surface of the inner rotating arm 43 is provided with a avoiding groove 431, the bottom end of the avoiding groove 431 is provided with a hooking groove two 432, the locking shaft 453 penetrates through the hooking groove two 432 to lock the inner joint 42 and the inner rotating arm 43, and when the sliding block 451 is pushed to unlock and fold, the locking shaft 453 enters the avoiding groove 431 and slides in the avoiding groove 431.

As shown in fig. 4, during locking, the locking shaft 453 is tightly attached to the side wall of the second hooking groove 432, and during unlocking, the pushing slider 451 can drive the locking shaft 453 to slide in the first sliding groove 421, and the locking shaft 453 enters the inside of the avoiding groove 431 from the second hooking groove 432, so that the locking shaft 453 can slide in the inside of the avoiding groove 431, that is, the outer joint 41 and the inner rotating arm 43 can relatively rotate, so as to achieve the purpose of unlocking.

Further, an eccentric groove two 441 is formed on the side surface of the outer rotating arm 44, a hook groove three 442 is formed at one end of the eccentric groove two 441, and the locking shaft 453 penetrates through the hook groove three 442 to lock the outer joint 41 and the outer rotating arm 44, and when the sliding block 451 is pushed to unlock for folding, the locking shaft 453 enters the eccentric groove two 441 and slides in the eccentric groove two 441.

As shown in fig. 4, during locking, the locking shaft 453 is tightly attached to the side wall of the third hooking groove 442, and during unlocking, the pushing slider 451 can drive the locking shaft 453 to slide in the first sliding groove 421, and the locking shaft 453 enters the second eccentric groove 441 from the third hooking groove 442, so that the locking shaft 453 can slide in the second eccentric groove 441, that is, the outer joint 41 and the outer rotating arm 44 can relatively rotate, so as to achieve the unlocking purpose.

In this embodiment, the side of the inner joint 42 is provided with the second sliding slot 422, the side of the outer joint 41 is provided with the first eccentric slot 413, one end of the first eccentric slot 413 is close to the rotating shaft 40, the other end is far away from the rotating shaft 40, the side of the outer rotating arm 44 is provided with the third eccentric slot 443, one end of the third eccentric slot 443 is close to the rotating shaft 40, the other end is far away from the rotating shaft 40, the transmission component is a control shaft 46 movably inserted into the second sliding slot 422, the first eccentric slot 413 and the third eccentric slot 443, and when the locking component 45 locks the outer joint 41 and the outer rotating arm 44, the control shaft 46 is simultaneously positioned at one ends of the first eccentric slot 413 and the third eccentric slot 443 far away from the rotating shaft 40.

It should be noted that, when the outer joint 41 is rotated, one end of the second chute 422 faces the rotating shaft 40, and the other end is away from the rotating shaft 40, the control shaft 46 is moved in a direction approaching the rotating shaft 40 by guiding the first eccentric chute 413, and the control shaft 46 can rotate the inner rotating arm 43 by pushing the side wall of the third eccentric chute 443.

In this embodiment, a fixing block 414 is fixedly disposed at the edge of the side surface of the outer joint 41, a second arc-shaped slot 433 is formed on one side of the inner rotating arm 43, and the fixing block 414 is located inside the second arc-shaped slot 433 and can slide inside the second arc-shaped slot 433.

It should be noted that, as shown in fig. 5, in the unlocked state, the fixing block 414 is tightly attached to the right end of the second arc-shaped slot 433, and after unlocking, when the outer joint 41 is rotated, the inner rotating arm 43 is rotated downward due to the gravity of the seat assembly 3, so as to achieve the folding purpose. At the time of deployment, the right end of the arc-shaped groove two 433 is pulled upward by the fixing block 414, so that the inner rotating arm 43 can be rotated upward even if the seat assembly 3 is deployed.

In the present embodiment, the handle 6 is mounted on the rear side of the joint assembly 4. When folding, the handle 6 can be pulled to operate, so that the labor is saved, and when carrying the child trolley, the handle 6 can also be used to operate.

Specifically, when unfolded, as shown in fig. 1 to 5, the locking shaft 453 is engaged in the first hook groove 412, the second hook groove 432, and the third hook groove 442, so that the relative positions of the outer joint 41, the inner joint 42, the inner rotating arm 43, and the outer rotating arm 44 are fixed. When folding, the sliding piece 53 is pressed by the movable rod 52, so that the sliding piece 53 drives the sliding piece 451 and the locking shaft 453 to move, the locking shaft 453 moves from the first hooking groove 412 to the first arc-shaped groove 411, from the second hooking groove 432 to the avoiding groove 431 and from the third hooking groove 442 to the second eccentric groove 441, and therefore unlocking is achieved. Then, the handle 6 is pulled by one hand, the other hand is pushed to fold the rotating handle assembly 5, even if the outer joint 41 rotates, when the outer joint 41 rotates, the control shaft 46 moves towards the direction close to the rotating shaft 40 through the guiding effect of the eccentric groove I413, and in the moving process of the rotating shaft 40, the side wall of the eccentric groove III 443 is pushed, namely, the side wall of the eccentric groove III 443 moves from one end, far away from the rotating shaft 40, to one end, close to the rotating shaft 40, and at the moment, the outer rotating arm 44 can be driven to rotate, so that the folding of the rear wheel assembly 2 is realized; when the outer joint 41 rotates, the fixed block 414 slides in the arc-shaped groove II 433, so that the inner rotating arm 43 rotates downwards under the gravity action of the seat assembly 3, and the seat assembly 3 is folded. At the time of deployment, the reverse operation is described above, in which the inner rotating arm 43 is deployed by pulling the arc-shaped groove two 433 by the fixing block 414 rotating upward.

Example two

The present embodiment provides a child cart comprising a front wheel assembly 1, a rear wheel assembly 2, a seat assembly 3, a joint assembly 4, a handle assembly 5, and the joint assembly 4 provided in the first embodiment, wherein, when installed, the handle assembly 5 is mounted on an outer joint 41, the front wheel assembly 1 is mounted on an inner joint 42, the seat assembly 3 is mounted on an inner rotating arm 43, and the rear wheel assembly 2 is mounted on an outer rotating arm 44.

In this embodiment, the handle assembly 5 includes a fixed rod 51 and a movable rod 52 inserted into the fixed rod 51, the fixed rod 51 is installed at the rear side of the outer joint 41, a sliding member 53 is movably provided at the rear side of the outer joint 41, and the movable rod 52 is unlocked by pushing the sliding member 53 and then pushing the sliding member 451 through the sliding member 53.

It should be noted that, the unlocking of the locking member 45 may be performed by the handle assembly 5, that is, when the movable rod 52 is retracted, the movable rod 52 may press the sliding member 53, so that the sliding member 53 pushes the sliding block 451 to move to unlock, and the sliding member 53 may be configured with a spring to reset, or may be driven to reset when the sliding block 451 resets.

Claims (10)

1. A children's handcart joint structure, its characterized in that: the device comprises a joint assembly (4), wherein the joint assembly (4) comprises an outer joint (41), an inner joint (42) with one end arranged in the middle of the outer joint (41), an inner rotating arm (43) arranged on the side surface of the outer joint (41) and an outer rotating arm (44) arranged on the side surface of the inner rotating arm (43), and the outer joint (41), the inner joint (42), the inner rotating arm (43) and the outer rotating arm (44) are rotationally connected through a rotating shaft (40);

the joint assembly (4) further comprises a locking part (45) for locking the outer joint (41), the inner joint (42), the inner rotating arm (43) and the outer rotating arm (44), and a transmission part for transmitting power between the outer joint (41) and the outer rotating arm (44);

when the outer joint (41) is folded by rotating the outer joint (41) in the direction of the inner joint (42) after the outer joint (41), the inner joint (42), the inner rotating arm (43) and the outer rotating arm (44) are unlocked by the locking component (45), the outer joint (41) drives the outer rotating arm (44) to rotate and fold in the direction of the inner joint (42) through the transmission component, and the inner rotating arm (43) rotates and folds freely in the direction of the inner joint (42).

2. A child trolley joint structure according to claim 1, wherein: the locking component (45) comprises a sliding block (451) which is arranged on the inner side of the inner joint (42) in a sliding manner, the sliding block (451) is reset through a spring (452), a locking shaft (453) is transversely and fixedly connected to the bottom end of the sliding block (451), a sliding groove I (421) is formed in the side face of the inner joint (42), the locking shaft (453) penetrates through the sliding groove I (421), and when the sliding block (451) is pressed, the locking shaft (453) slides in the sliding groove I (421).

3. A child trolley joint structure according to claim 2, wherein: an arc groove I (411) is formed in the side face of the outer joint (41), a hook groove I (412) is formed in the bottom end of the arc groove I (411), the locking shaft (453) penetrates through the hook groove I (412) to lock the outer joint (41) and the inner joint (42), and when the sliding block (451) is pushed to unlock for folding, the locking shaft (453) enters the arc groove I (411) and slides in the arc groove I.

4. A child trolley joint structure according to claim 2, wherein: the side of interior turning arm (43) has been seted up and has been dodged groove (431), dodge the bottom in groove (431) and have been seted up and collude groove two (432), thereby locking axle (453) pass and collude groove two (432) with interior joint (42) and interior turning arm (43) locking, when promoting slider (451) unblock and folding, locking axle (453) get into dodge groove (431) and in its inside slip.

5. A child trolley joint structure according to claim 2, wherein: an eccentric groove II (441) is formed in the side face of the outer rotating arm (44), a hook groove III (442) is formed in one end of the eccentric groove II (441), the locking shaft (453) penetrates through the hook groove III (442) to lock the outer joint (41) and the outer rotating arm (44), and when the sliding block (451) is pushed to unlock and fold, the locking shaft (453) enters the eccentric groove II (441) and slides in the eccentric groove II.

6. A child trolley joint structure according to claim 1, wherein: the side of interior joint (42) has seted up spout two (422), eccentric slot one (413) has been seted up to the side of outer joint (41), one end of eccentric slot one (413) is close to pivot (40) and the other end is kept away from pivot (40), eccentric slot three (443) has been seted up to the side of outer pivot (44), eccentric slot three (443) one end is close to pivot (40) and the other end is kept away from pivot (40), and the drive unit is control shaft (46) that the activity was pegged graft in spout two (422), eccentric slot one (413) and eccentric slot three (443) inside, and when locking component (45) were locked outer joint (41) and outer pivot (44), control shaft (46) were located eccentric slot one (413) and eccentric slot three (443) simultaneously and keep away from the one end of pivot (40).

7. A child trolley joint structure according to claim 1, wherein: the edge of outer joint (41) side is fixed and is provided with fixed block (414), arc wall second (433) have been seted up to one side of interior turning arm (43), fixed block (414) are located the inside of arc wall second (433) and can slide in the inside of arc wall second (433).

8. A child trolley joint structure according to claim 1, wherein: the rear side of the joint component (4) is provided with a handle (6).

9. Child trolley, characterized by comprising a front wheel assembly (1), a rear wheel assembly (2), a seat assembly (3), a joint assembly (4), a handle assembly (5), and further comprising a joint assembly (4) according to any of claims 1-8, the handle assembly (5) being mounted on an outer joint (41), the front wheel assembly (1) being mounted on an inner joint (42), the seat assembly (3) being mounted on an inner swivel arm (43), the rear wheel assembly (2) being mounted on an outer swivel arm (44).

10. A child trolley according to claim 9, wherein: the handle assembly (5) comprises a fixed rod (51) and a movable rod (52) inserted into the fixed rod (51), the fixed rod (51) is arranged on the rear side of the outer joint (41), a sliding piece (53) is movably arranged at the rear side of the outer joint (41), and the movable rod (52) is unlocked by pushing the sliding piece (53) and then pushing the sliding piece (451) through the sliding piece (53).