CN219056349U - Child cart - Google Patents

Abstract

The utility model discloses a children handcart, which comprises a frame, side brackets on the left side and the right side of the frame, a front supporting rod, a rear supporting rod, a front connecting rod and a rear connecting rod, wherein the front connecting rod and the rear connecting rod are arranged between the front supporting rod and the rear supporting rod, the cross brace assembly comprises a front cross brace arranged between the front supporting rods on the two sides and a rear cross brace arranged between the rear supporting rods on the two sides, the front cross brace comprises two front supporting rods which are connected with each other in a rotating way, the rear cross brace comprises rear supporting rods which are connected with each other in a rotating way, the side brackets on each side further comprise a front linkage rod and a rear linkage rod, the front linkage rod is connected between the front supporting rod and the rear connecting rod in a universal rotating way, and the rear linkage rod is connected between the rear supporting rod and the front connecting rod in a universal rotating way. In the process of converting the frame from the unfolding state to the folding state, the front support rod, the rear support rod, the front connecting rod and the rear connecting rod are folded along the front-rear direction, and the linkage enables the two front support rods to relatively rotate to fold along the left-right direction, and the two rear support rods to relatively rotate to fold along the left-right direction.

Description

Child cart

Technical Field

The utility model relates to the field of children products, in particular to a child trolley.

Background

In order to facilitate daily carrying, storage and storage, the child stroller is mostly foldable. Some children's carts can be folded longitudinally and also folded laterally in a left-right direction. At present, most of the transverse folding operation of the children's barrow is realized by independent operation through manual operation of an operator after the frame is folded longitudinally, so that the operation steps during folding are increased, and inconvenience is brought to a user.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a child cart capable of being folded transversely.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the baby stroller comprises a frame with an unfolding state and a folding state, a front wheel assembly and a rear wheel assembly which are arranged at the bottom of the frame, and a locking mechanism for locking the frame in the unfolding state, wherein the frame comprises two groups of side brackets which are respectively arranged at the left side and the right side, a transverse strut assembly which is arranged between the two groups of side brackets and can be folded along the left-right direction, each group of side brackets comprises a front supporting rod, a rear supporting rod, a front connecting rod and a rear connecting rod which are arranged between the front supporting rod and the rear supporting rod, the front supporting rod extends obliquely from front to back, the rear supporting rod extends obliquely from back to front upwards, the front connecting rod and the rear connecting rod extend along the front-back direction, the front wheel assembly is arranged at the bottom of the front supporting rod, the rear wheel assembly is arranged at the bottom of the rear supporting rod, the upper part of the front supporting rod is connected with the upper part of the rear supporting rod in a relative rotating way, the front part of the front connecting rod is pivotally connected with the front supporting rod, the rear part of the front connecting rod is pivotally connected with the front part of the rear connecting rod, the rear part of the rear connecting rod is pivotally connected with the rear supporting rod, the cross support component comprises a front cross support arranged between the front supporting rods at two sides and a rear cross support arranged between the rear supporting rods at two sides, the front cross support comprises two front supporting rods which extend along the left and right directions, one end parts of the two front supporting rods are pivotally connected, the other end parts of the front supporting rods are pivotally connected with the front supporting rods, the rear cross support comprises two rear supporting rods which extend along the left and right directions, one end parts of the two rear supporting rods are pivotally connected with the rear supporting rods, the other end parts of the rear supporting rods are pivotally connected with the rear supporting rods, the side supports at each side also comprise a front linkage rod and a rear linkage rod, one end part of the front linkage rod is connected to the front stay rod in a universal rotation manner, and the other end part of the front linkage rod is connected to the rear connecting rod in a universal rotation manner; one end of the rear linkage rod is connected to the rear stay rod in a universal rotation mode, the other end of the rear linkage rod is connected to the front connecting rod in a universal rotation mode, and in the process of converting the vehicle frame from an unfolding state to a folding state, the front support rod, the rear support rod, the front connecting rod and the rear connecting rod are folded in the front-rear direction, the linkage enables the two front stay rods to rotate relatively and fold in the left-right direction, and the two rear stay rods to rotate relatively and fold in the left-right direction.

Preferably, in the process of converting the frame from the unfolded state to the folded state, the end parts of the two front supporting rods which are connected with each other in a pivot manner and the end parts of the two rear supporting rods which are connected with each other in a pivot manner respectively move upwards, so that the front cross braces and the rear cross braces are respectively folded between the side brackets on the two sides along the left-right direction.

Preferably, the rear portion of the front link is pivotally connected to the front portion of the rear link about a first axis, the front link is connected to the front portion of the rear link in a universal rotation manner by a front revolute joint, the rear link is connected to the rear portion of the front link in a universal rotation manner by a rear revolute joint, the front revolute joint is located in front of the first axis, and the rear revolute joint is located behind the first axis.

Preferably, one end parts of the two front stay bars are pivotally connected around a front rotating shaft, the other end parts of the front stay bars are pivotally connected to the front stay bars around a front connecting shaft, the front parts of the front linkage bars are connected to the front stay bars in a universal rotation manner through first rotating joints, and the first rotating joints are located between the front rotating shaft and the front connecting shaft along the length extending direction of the front stay bars; one end parts of the two rear supporting rods are pivotally connected around a rear rotating shaft, the other end parts of the rear supporting rods are pivotally connected to the rear supporting rods around rear connecting shafts, the rear parts of the rear linkage rods are connected to the rear supporting rods in a universal rotation mode through second rotating joints, and the second rotating joints are located between the rear rotating shafts and the rear connecting shafts along the length extending direction of the rear supporting rods.

Preferably, the front link rod and the front stay rod, the front link rod and the rear link rod, the rear link rod and the rear stay rod, and the rear link rod and the front link rod are respectively connected in a universal rotation manner through ball joints or universal joints.

Preferably, the side bracket of each side further comprises a side lever, a push rod, a stay and a swing rod, wherein two of the upper end portion of the front stay, the upper end portion of the rear stay and the lower end portion of the side lever are pivotally connected and the third is pivotally connected to one of the two, or the upper end portion of the front stay, the upper end portion of the rear stay and the lower end portion of the side lever are mutually pivotally connected around the same axis, the upper end portion of the side lever is pivotally connected to the push rod, the stay is pivotally connected to the rear stay, the upper end portion of the stay is pivotally connected to the lower end portion of the push rod, and the swing rod is pivotally connected between the lower end portion of the stay and the rear link.

In some embodiments, the side brackets on each side further comprise a seat bar, the rear portion of the seat bar is pivotally connected to the stay bar, the side bar is pivotally connected to a sliding member, and the sliding member is relatively slidably disposed on the seat bar along the length extension direction of the seat bar.

In some embodiments, the frame further includes a backrest assembly connected to the seat bars at two sides and capable of extending and retracting in a left-right direction, the backrest assembly includes a back plate, a first connecting frame, a second connecting frame, and a backrest link assembly disposed between the back plate and the first and second connecting frames, the first connecting frame is disposed on the seat bar at one side, the second connecting frame is disposed on the seat bar at the other side, and when the frame is in an unfolded state, the first connecting frame and the second connecting frame are disposed at left and right sides of the back plate; when the frame is in a folding state, the first connecting frame and the second connecting frame are respectively folded relative to the backboard along the left-right direction, and the backboard moves downwards and is folded with the first connecting frame and the second connecting frame.

In some embodiments, the backrest link assembly comprises a first link, a second link, a third link, and a fourth link, wherein the first link and the second link are interdigitated and pivotally connected at an intersection, one end of the first link is pivotally connected to the first connecting frame, and the other end of the first link is pivotally connected to the third link; one end part of the third connecting rod is pivotally connected to the second connecting frame, and the other end part of the third connecting rod is connected with the backboard in a manner of relatively rotating and relatively sliding along the left-right direction; one end part of the second connecting rod is pivotally connected to the second connecting frame, and the other end part of the second connecting rod is pivotally connected to the fourth connecting rod; one end of the fourth connecting rod is pivotally connected to the first connecting frame, and the other end of the fourth connecting rod is connected to the backboard in a manner of being capable of relatively rotating and relatively sliding in the left-right direction.

In some embodiments, the cross brace assembly further comprises a seat link assembly disposed between the seat bars at both sides, the seat link assembly including a fifth link and a sixth link intersecting each other and pivotally connected at an intersection, a seventh link and an eighth link intersecting each other and pivotally connected at an intersection, the fifth link being pivotally connected between the seat bar at one side and one end of the seventh link, the other end of the seventh link being pivotally connected to the seat bar at the other side, one end of the sixth link being pivotally connected to one end of the eighth link, the other end of the sixth link being pivotally connected to a first slider, the other end of the eighth link being pivotally connected to a second slider, the first slider being slidably disposed on the seat bar at one side, and the second slider being slidably disposed on the seat bar at the other side.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages: in the children cart, the front support rod, the rear support rod, the front connecting rod and the rear connecting rod are relatively rotated and folded along the front-rear direction in the folding process of the cart frame, so that the front linkage rod and the rear linkage rod can be respectively linked to fold the front transverse support and the rear transverse support between the two groups of side supports along the left-right direction in the longitudinal folding process of the side supports, and the linkage folding of the cart frame along the left-right direction is realized. The frame can be folded longitudinally and transversely by only one step, the folding steps are few, and convenience is brought to daily use of users.

Drawings

FIG. 1 is a schematic perspective view of a stroller in an unfolded state according to an embodiment of the present utility model;

FIG. 2 is a schematic side view of the child stroller of FIG. 1;

FIG. 3 is a schematic perspective view of the stroller of FIG. 1 with the seat link assembly removed;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3;

FIG. 5 is a schematic rear view of the stroller of FIG. 3 in an expanded configuration;

FIG. 6 is an enlarged schematic view of portion B of FIG. 5;

FIG. 7 is a second perspective view of the stroller of FIG. 3 in an expanded configuration;

FIG. 8 is a perspective view III of the stroller of FIG. 3 in an expanded configuration;

FIG. 9 is a perspective view of the stroller of FIG. 3 in an expanded configuration;

FIG. 10 is a schematic front view of the stroller of FIG. 3 in an expanded condition;

FIG. 11 is a schematic perspective view of the stroller of FIG. 3 in a semi-collapsed condition;

FIG. 12 is a side view schematic of the stroller of FIG. 11;

FIG. 13 is a second perspective view of the stroller of FIG. 11 in a semi-collapsed configuration;

FIG. 14 is a schematic view of the seat link assembly of the stroller of FIG. 1 as deployed in a side-to-side direction;

FIG. 15 is a schematic view of the seat link assembly of FIG. 14 folded in a left-right direction;

FIG. 16 is a perspective view of the stroller of FIG. 3 in a collapsed configuration;

FIG. 17 is a side view schematic illustration of the stroller of FIG. 16;

FIG. 18 is a schematic front view of the stroller of FIG. 16;

FIG. 19 is a schematic rear view of the stroller of FIG. 16;

wherein: 1. a side bracket; 11. a front strut; 12. a rear strut; 13. a front link; 14. a rear connecting rod; 15. a side bar; 16. a push rod; 17. a brace rod; 18. swing rod; 19. a seat rod; 110. a seat rod sliding sleeve; 111. a first shaft; 2. a front cross brace; 21. a front stay; 22. a front rotating shaft; 23. a front connecting shaft;

3. a rear cross brace; 31. a rear stay; 32. a rear rotating shaft; 33. a rear connecting shaft;

4. a front linkage rod; 41. a first rotary joint; 42. a front revolute joint;

5. a rear link lever; 52. a rear revolute joint; 53. a second revolute joint;

6. a seat link assembly; 61. a fifth link; 62. a sixth link; 63. a seventh link; 64. an eighth link; 65. a first slider; 66. a second slider;

7. a backrest assembly; 71. a first connection frame; 72. a second connecting frame; 73. a backboard; 73a, guide grooves; 73b, a first chute; 73c, a second chute; 74. a first link; 75. a second link; 76. a third link; 77. a fourth link; 78. a first slide pin; 79. a second slide pin; 710. a third slide pin; 8. a front wheel assembly; 9. and a rear wheel assembly.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

The following description of the front, rear, left, right, up, down, etc. directions are defined with reference to the directions that a child is observed when sitting on the stroller in the unfolded state, only for the purpose of clearly explaining the relative positional relationship between the rod members in the stroller.

Referring to fig. 1 to 19, a stroller comprises a frame foldable in a left-right direction, a front wheel assembly 8 and a rear wheel assembly 9 provided at the bottom of the frame, and a locking mechanism for locking the frame in an unfolded state, wherein the frame comprises two sets of side brackets 1 provided on the left and right sides respectively, and a cross brace assembly provided between the two sets of side brackets 1 and foldable in the left-right direction.

Each set of side brackets 1 comprises a front supporting rod 11, a rear supporting rod 12, a front connecting rod 13 and a rear connecting rod 14, wherein the front connecting rod 13 and the rear supporting rod 12 are arranged between the front supporting rod 11 and the rear supporting rod 12, the front supporting rod 11 extends obliquely upwards from front to back, the rear supporting rod 12 extends obliquely upwards from back to front, the front connecting rod 13 and the rear connecting rod 14 extend in the front-back direction, the front wheel assembly 8 is arranged at the bottom of the front supporting rod 11, the rear wheel assembly 9 is arranged at the bottom of the rear supporting rod 12, the upper part of the front supporting rod 11 is connected with the upper part of the rear supporting rod 12 in a relatively rotating manner, the front part of the front connecting rod 13 is pivotally connected to the front supporting rod 11, the rear part of the front connecting rod 13 is pivotally connected with the front part of the rear connecting rod 14 around a first shaft 111, and the rear part of the rear connecting rod 14 is pivotally connected to the rear supporting rod 12.

The cross brace assembly at least comprises a front cross brace 2 arranged between the front support rods 11 at two sides and a rear cross brace 3 arranged between the rear support rods 12 at two sides, wherein the front cross brace 2 comprises two front support rods 21 which extend along the left-right direction, one adjacent end parts of the two front support rods 21 are pivotally connected around a front rotating shaft 22, and the other end parts of the two front support rods 21 are respectively pivotally connected to the front support rods 11 at the corresponding sides around front connecting shafts 23. Here, the front wale 2 is a pedal frame provided between lower portions of the front struts 11 at both sides for providing both feet of a child seated on the cart to support. The rear cross brace 3 includes two rear stay rods 31 each extending in the left-right direction, one end portions of the two rear stay rods 31 adjacent to each other are pivotally connected about a rear rotation shaft 32, and the other end portions of the two rear stay rods 31 are pivotally connected to the rear struts 12 on the respective sides about rear connection shafts 33. Here, the rear cross brace 3 is disposed between lower portions of the rear struts 12 on both sides.

Referring to the drawings, the side bracket 1 on each side further comprises a front linkage rod 4 and a rear linkage rod 5, one end part of the front linkage rod 4 is connected to the front support rod 21 in a universal rotation manner, and the other end part of the front linkage rod 4 is connected to the rear connecting rod 14 in a universal rotation manner; one end of the rear link 5 is connected to the rear stay 31 in a universal rotation manner, and the other end of the rear link 5 is connected to the front link 13 in a universal rotation manner.

Specifically, in the unfolded state of the frame, the front linkage rod 4 and the rear linkage rod 5 extend in the front-rear direction, and the front part of the front linkage rod 4 is connected to the front stay rod 21 in a universal rotation manner through the first rotation joint 41; the rear part of the front linkage rod 4 is connected with the front part of the rear connecting rod 14 in a universal rotation way through a front rotary joint 42; the front part of the rear link 5 is connected to the rear part of the front link 13 by a rear pivot joint 51 and the rear part of the rear link 5 is connected to the rear stay 31 by a second pivot joint 52. The first rotary joint 41 is located between the front rotary shaft 22 and the front connecting shaft 23 along the length extending direction of the front supporting rod 21, the second rotary joint 52 is located between the rear rotary shaft 32 and the rear connecting shaft 33 along the length extending direction of the rear supporting rod 31, the front rotary joint 42 and the rear rotary joint 51 are respectively arranged on the front and rear sides of the first shaft 111, specifically, the front rotary joint 42 is located in front of the first shaft 111, and the rear rotary joint 51 is located behind the first shaft 111, which also makes the front linkage rod 4 and the rear linkage rod 5 distributed in tandem in the front and rear direction, so as to avoid affecting the compactness of the folded frame.

The first revolute joint 41, the front revolute joint 42, the rear revolute joint 51 and the second revolute joint 52 are all ball joints or universal joints, and specifically, as shown in fig. 3 to 6, the front revolute joint 42 and the rear revolute joint 51 are all universal joints, and the first revolute joint 41 and the second revolute joint 52 are all ball joints.

Thus, when the frame is folded, in the process that the side brackets 1 on two sides are folded longitudinally, when the front support rod 11 and the rear support rod 12 are folded in the front-rear direction, the front connecting rod 13 and the rear connecting rod 14 rotate relatively and are gradually folded between the front support rod 11 and the rear support rod 12 in the front-rear direction, the front linkage rod 4 drives the two front support rods 21 to rotate relatively and fold in the left-right direction, and meanwhile, the rear linkage rod 6 drives the two rear support rods 31 to rotate relatively and fold in the left-right direction, so that folding in the left-right direction of the frame is linked. In the process of folding the front cross brace 2 and the rear cross brace 3 along the left-right direction, the end parts connected with the two front support rods 21 and the end parts connected with the two rear support rods 31 respectively move upwards, so that the front support rods 21 and the rear support rods 31 are respectively folded between the side brackets 1 on the two sides in an upwards overturning manner, and the height of the folded frame is not increased.

Referring to the drawings, in the present embodiment, the side bracket 1 of each side further includes a side lever 15, a push rod 16, a stay 17, and a swing lever 18, wherein two of the upper end portion of the front strut 11, the upper end portion of the rear strut 12, and the lower end portion of the side lever 15 are pivotally connected and the third is pivotally connected to one of the two, or the upper end portion of the front strut 11, the upper end portion of the rear strut 12, and the lower end portion of the side lever 15 are pivotally connected together about the same rotation center line according to the present embodiment. The upper end of the side lever 15 is pivotally connected to the push rod 16, the stay 17 is pivotally connected to the rear strut 12, the upper end of the stay 17 is pivotally connected to the lower end of the push rod 16, one end of the swing lever 18 is pivotally connected to the lower end of the stay 17, the other end of the swing lever 18 is pivotally connected to the rear link 14, and the position of the pivot connection of the swing lever 18 on the rear link 14 is located behind the first shaft 111 and in front of the rotational connection position of the rear link 14 and the rear strut 12.

The side brackets 1 on each side further comprise a seat bar 19, the frame in the unfolded state of the frame extends in the front-rear direction, the rear part of the seat bar 19 is pivotally connected to the stay 17, the side bars 15 are pivotally connected to a sliding member, here the sliding member is specifically a seat bar sliding sleeve 110, and the seat bar sliding sleeve 110 is slidably sleeved on the seat bar 19.

The frame further comprises a backrest assembly 7 which is connected with the seat bars 19 on both sides and can extend and retract in the left-right direction. Referring to fig. 1 to 10, the backrest module 7 includes a back plate 73, a first link 71 and a second link 72, and a backrest link module disposed between the back plate 73 and the first link 71 and the second link 72, the first link 71 being disposed on the side bracket 1 of one side, and the second link 72 being disposed on the side bracket 1 of the other side. Specifically, the lower portion of the first link 71 is pivotally connected to the lower portion of the one side seat post 19, and the lower portion of the second link 72 is pivotally connected to the lower portion of the other side seat post 19, so that the backrest module 7 can be integrally pivoted and folded with respect to the seat post 19. When the frame is in the unfolded state, the backrest assembly 7 is unfolded along the left-right direction, and the first connecting frame 71 and the second connecting frame 72 are respectively arranged at the left side and the right side of the backrest plate 73; when the frame is in a folded state, the first connecting frame 71 and the second connecting frame 72 are respectively folded relative to the backboard 73 along the left-right direction, and the backboard 73 moves downwards and is folded with the first connecting frame 71 and the second connecting frame 72, so that the backrest assembly 7 is folded along the left-right direction.

Referring to the drawings, the backrest link assembly includes a first link 74, a second link 75, a third link 76, and a fourth link 77, wherein the first link 74 and the second link 75 intersect each other and are pivotally connected at the intersection; one end of the first link 74 is pivotally connected to the first link 71 and the other end thereof is pivotally connected to the third link 76; one end of the third link 76 is pivotally connected to the second link 72 and the other end thereof is connected to the backboard 73 so as to be relatively rotatable and relatively slidable in the left-right direction; one end of the second link 75 is pivotally connected to the second link frame 72 and the other end thereof is pivotally connected to the fourth link 77; one end portion of the fourth link 77 is pivotally connected to the first link 71 and the other end portion thereof is connected to the backboard 73 so as to be relatively rotatable and relatively slidable in the left-right direction. In the process of converting the vehicle frame from the unfolded state to the folded state, the two groups of side brackets 1 approach in the left-right direction and drive the first connecting frame 71 and the second connecting frame 72 to move in the left-right direction, the backboard 73 moves downwards relative to the first connecting frame 71 and the second connecting frame 72 under the linkage action of the backrest connecting rod assembly, and the first connecting frame 71 and the second connecting frame 72 are respectively folded inwards towards the backboard 73 in the left-right direction.

In this embodiment, referring to the drawings, the first connecting frame 71 and the second connecting frame 72 are both plate-shaped, and when the frame is in an unfolded state, the first connecting frame 71 and the second connecting frame 72 are respectively arranged on the left side and the right side of the backboard 73, and form a back of a child sitting on the stroller together with the backboard 73 to support the child; when the frame is in a folded state, the first connecting frame 71 and the second connecting frame 72 are folded along the left-right direction and are located at the front side or the rear side of the backboard 73 together, where the first connecting frame 71 and the second connecting frame 72 are attached to each other along the left-right direction and are folded along the rear side of the backboard 73 together, and the widths of the first connecting frame 71 and the second connecting frame 72 are substantially identical to the width of the backboard 73.

Referring to fig. 1 to 10, in the present embodiment, the backrest link assembly is specifically disposed between the backboard 73 and the first and second link frames 71 and 72 as follows: the first link 74, the second link 75, the third link 76, and the fourth link 77 each extend in the up-down direction, the first link 74 and the second link 75 are pivotally connected at intersections about the rotation center line, the upper end portion of the first link 74 is pivotally connected to the first link frame 71, the upper end portion of the second link 75 is pivotally connected to the second link frame 72, the lower end portion of the first link 74 is pivotally connected to the third link 76, and the lower end portion of the second link 75 is pivotally connected to the fourth link 77. The upper end portion of the third link 76 is pivotally connected to the second link 72, the lower end portion of the third link 76 is provided with a first slide pin 78, the first slide pin 78 is provided on the backboard 73 so as to be slidable in the left-right direction, and the first slide pin 78 is provided so as to be rotatable with respect to at least one of the third link 76 and the backboard 73; the lower end portion of the fourth link 77 is pivotally connected to the first link 71, and the lower end portion of the fourth link 77 is provided with a second slide pin 79, and the second slide pin 79 is provided on the backboard 73 so as to be slidable in the left-right direction, and the second slide pin 79 is provided so as to be rotatable with respect to at least one of the fourth link 77 and the backboard 73.

At least one of the first link 74 and the second link 75 is connected to the backboard 73 so as to be relatively rotatable and relatively slidable in the up-down direction. In the present embodiment, a third slide pin 710 is provided at a position where the first link 74 and the second link 75 intersect with each other, the third slide pin 710 is provided on the backboard 73 so as to be capable of sliding relatively in the up-down direction, and the third slide pin 710 is provided so as to be capable of rotating with respect to at least one of the first link 74, the second link 75, and the backboard 73. Here, the back plate 73 is provided with a guide groove 73a extending in the up-down direction, and the third slide pin 710 is inserted in the guide groove 73a in a sliding fit manner, and is mainly used for providing a guide when the back plate 73 slides up and down relative to the first link 74 and the second link 75.

The lower portion of the backboard 73 is provided with a first runner 73b and a second runner 73c each extending in the left-right direction, the first runner 78 and the first runner 73b are slidably engaged with each other, and the second runner 79 and the second runner 73c are slidably engaged with each other. Here, the first slide pin 78 is inserted in the first slide groove 73b so as to be capable of both relative rotation about its own axis and relative sliding; the second slide pin 79 is inserted in the second slide groove 73c so as to be capable of both relative rotation about its own axis and relative sliding. The first chute 73b and the second chute 73c are positioned below the guide groove 73a on the backboard 73, and the first chute 73b and the second chute 73c are disposed on the left and right sides of the guide groove 73 a.

During the folding process of the frame, the two groups of side brackets 1 approach each other along the left-right direction, so that the backrest component 7 is gradually folded along the left-right direction. Referring to fig. 15, the left side bracket 1 drives the first link 71 to move inward toward the backboard 73 in the left-right direction, the right side bracket 1 drives the second link 72 to move inward toward the backboard 73 in the left-right direction, the first link 74 and the second link 75 rotate relatively to gradually collapse in the left-right direction, so that the lower end of the first link 74 and the lower end of the second link 75 move downward, and the third link 76 and the fourth link 77 rotate respectively, and the first slide pin 78 at the lower end of the third link 76 and the second slide pin 79 at the lower end of the fourth link 77 move inward and downward in the left-right direction, respectively, driving the backboard 73 to move downward under the guiding action of the third slide pin 710 to reduce the height, and gradually collapse in height with the first link 71 and the second link 72. During the folding process of the backrest assembly 7, the backrest plate 73 can move downwards, so that the cloth sleeve arranged outside the backrest assembly 7 cannot be excessively pulled and tensioned during the folding process of the frame, and the folding compactness of the frame is not affected.

As shown in fig. 16 to 19, after the frame is folded, the width of the side brackets 1 on both sides in the left-right direction is reduced, the backrest module 7 is folded in the left-right direction and is located between the two groups of side brackets 1, wherein the first connecting frame 71 and the second connecting frame 72 are close together in the left-right direction and are located on the rear side of the backrest plate 73, and the first connecting rod 74, the second connecting rod 75, the third connecting rod 76 and the fourth connecting rod 77 of the backrest connecting rod module are all folded in the gaps between the backrest plate 73 and the first connecting frame 71 and the second connecting frame 72. The width of the folded backrest module 7 is only equivalent to the width of the backboard 73, and the width is greatly reduced.

The cross brace assembly further includes a seat link assembly 6 disposed between the seat bars 19 on both sides and capable of extending and contracting in the left-right direction, as shown in fig. 11 and 12, the seat link assembly 6 includes a fifth link 61 and a sixth link 62 intersecting each other and pivotally connected at an intersection, a seventh link 63 and an eighth link 64 intersecting each other and pivotally connected at an intersection, the fifth link 61 is pivotally connected between the seat bar 19 on one side and one end of the seventh link 63, the other end of the seventh link 63 is pivotally connected to the seat bar 19 on the other side, one end of the sixth link 62 is pivotally connected to one end of the eighth link 64, the other end of the sixth link 62 is pivotally connected to a first slider 65, the other end of the eighth link 64 is pivotally connected to a second slider 66, the first slider 65 is slidably disposed on the seat bar 19 on one side, and the second slider 66 is slidably disposed on the seat bar 19 on the other side. Here, the first sliding member 65 and the second sliding member 66 are both sliding sleeves, and the sliding sleeves are slidably sleeved on the seat posts 19 on the corresponding sides. When the frame is unfolded, in the seat link assembly 6, the fifth link 61 and the sixth link 62, and the seventh link 63 and the eighth link 64 are unfolded in the left-right direction, respectively, so as to be supported between the two sets of seat bars 19 with a wide width; when the frame is folded, the first and second sliding members 65 and 66 slide along the seat bars 19 on the side where they are located, so that the fifth and sixth links 62 and 63 and the eighth links 64 rotate to gradually retract in the left-right direction, respectively, to be supported between the two sets of seat bars 19 with a narrow width. The seat connecting rod assembly 6 is arranged, so that the rods in the two side brackets 1 rotate to realize the longitudinal folding of the side brackets 1, and simultaneously, the seat connecting rod assembly 6 is folded transversely by linkage to provide acting force for the opposite movement of the two side brackets 1, so that the front cross brace 2 and the rear cross brace 3 can be folded transversely more compactly.

In the unfolded state of the stroller of this embodiment, as shown in fig. 1 to 10, the rods in the side brackets 1 are unfolded relatively, the front cross brace 2, the rear cross brace 3 and the seat link assembly 6 are unfolded in the left-right direction respectively to be supported between the two groups of side brackets 1, and the backrest assembly 7 is unfolded in the left-right direction and is unfolded relatively to the seat rod 19 to be supported by the backrest.

When the frame needs to be folded, the backrest component 7 is driven to turn over and fold with the seat rod 19, then the push rod 16 is driven to move backwards and downwards, so that the side rods 15 and the supporting rods 17 are respectively turned backwards, the rods in the side brackets 1 on two sides are folded by relative rotation, so that the side brackets 1 are gradually folded longitudinally, the front connecting rod 13 and the rear connecting rod 14 in the side brackets 1 are folded by relative rotation, the front connecting rod 4 and the rear connecting rod 5 are linked to drive the two front supporting rods 21 in the front transverse support 2 to be folded in the left-right direction by relative rotation, and the two rear supporting rods 31 in the rear transverse support 3 are driven to be folded in the left-right direction by relative rotation, so that the two groups of side brackets 1 are gradually close to each other in the left-right direction. In the process of approaching and folding the two sets of side brackets 1 in the left-right direction, each link in the seat link assembly 6 rotates to fold the seat link assembly in the left-right direction, and the first connecting frame 71 and the second connecting frame 72 in the backrest assembly 7 also move towards the backrest plate 73 in the left-right direction respectively, so that the backrest assembly 7 is gradually folded in the left-right direction. The folding operation is simple and convenient, the folding steps are few, the folded frame is as shown in fig. 16 to 19, the structure is compact, and the occupied space is small.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (10)

1. The utility model provides a children's shallow, includes the frame that has expansion state and folding state, locates front wheel subassembly and rear wheel subassembly bottom the frame, and is used for with locking mechanical system under the expansion state of frame lock, the frame is including locating the two sets of side support of left and right sides, setting in two sets of between the side support and can follow the stull subassembly that left and right directions folded up, its characterized in that:

each group of side brackets comprises a front supporting rod, a rear supporting rod, a front connecting rod and a rear connecting rod, wherein the front connecting rod and the rear connecting rod are arranged between the front supporting rod and the rear supporting rod, the front supporting rod obliquely extends from front to back upwards, the rear supporting rod obliquely extends from back to front upwards, the front connecting rod and the rear connecting rod extend along the front-back direction, the front wheel assembly is arranged at the bottom of the front supporting rod, the rear wheel assembly is arranged at the bottom of the rear supporting rod, the upper part of the front supporting rod is connected with the upper part of the rear supporting rod in a relatively rotating manner, the front part of the front connecting rod is pivotally connected with the front supporting rod, the rear part of the front connecting rod is pivotally connected with the front part of the rear connecting rod, the rear part of the rear connecting rod is pivotally connected with the rear supporting rod,

the cross brace assembly comprises a front cross brace arranged between the front support rods at two sides and a rear cross brace arranged between the rear support rods at two sides, wherein the front cross brace comprises two front support rods which extend along the left and right directions, one end parts of the two front support rods are in pivot connection, the other end parts of the front support rods are in pivot connection with the front support rods, the rear cross brace comprises two rear support rods which extend along the left and right directions, one end parts of the two rear support rods are in pivot connection, the other end parts of the rear support rods are in pivot connection with the rear support rods,

the side brackets on each side further comprise a front linkage rod and a rear linkage rod, one end part of the front linkage rod is connected to the front support rod in a universal rotation mode, and the other end part of the front linkage rod is connected to the rear connecting rod in a universal rotation mode; one end part of the rear linkage rod is connected to the rear stay rod in a universal rotation way, the other end part of the rear linkage rod is connected to the front connecting rod in a universal rotation way,

in the process of converting the frame from the unfolding state to the folding state, the front support rod, the rear support rod, the front connecting rod and the rear connecting rod are folded along the front-rear direction, and the two front support rods are linked to relatively rotate to fold along the left-right direction, and the two rear support rods are linked to relatively rotate to fold along the left-right direction.

2. The stroller of claim 1, wherein: in the process of converting the frame from the unfolding state to the folding state, the end parts of the two front support rods, which are connected with each other through the pivot shafts, and the end parts of the two rear support rods, which are connected with each other through the pivot shafts, respectively move upwards, so that the front cross support and the rear cross support are folded between the side supports on the two sides along the left and right directions respectively.

3. The stroller of claim 1, wherein: the rear part of the front connecting rod is connected with the front part of the rear connecting rod around a first shaft in a pivoting way, the front linkage rod is connected with the front part of the rear connecting rod in a universal rotation way through a front rotating joint, the rear linkage rod is connected with the rear part of the front connecting rod in a universal rotation way through a rear rotating joint, the front rotating joint is positioned in front of the first shaft, and the rear rotating joint is positioned behind the first shaft.

4. The stroller of claim 1, wherein: one end parts of the two front supporting rods are pivotally connected around a front rotating shaft, the other end parts of the front supporting rods are pivotally connected to the front supporting rods around a front connecting shaft, the front parts of the front linkage rods are connected to the front supporting rods in a universal rotation manner through first rotating joints, and the first rotating joints are located between the front rotating shaft and the front connecting shaft along the length extending direction of the front supporting rods; one end parts of the two rear supporting rods are pivotally connected around a rear rotating shaft, the other end parts of the rear supporting rods are pivotally connected to the rear supporting rods around rear connecting shafts, the rear parts of the rear linkage rods are connected to the rear supporting rods in a universal rotation mode through second rotating joints, and the second rotating joints are located between the rear rotating shafts and the rear connecting shafts along the length extending direction of the rear supporting rods.

5. The stroller of claim 1, wherein: the front linkage rod and the front supporting rod, the front linkage rod and the rear connecting rod, the rear linkage rod and the rear supporting rod, and the rear linkage rod and the front connecting rod are respectively connected in a universal rotation manner through ball joints or universal joints.

6. A stroller according to any one of claims 1 to 5, wherein: the side brackets of each side further comprise side rods, push rods, supporting rods and swinging rods, wherein the upper end parts of the front supporting rods, the upper end parts of the rear supporting rods and the lower end parts of the side rods are in pivot connection, a third person is in pivot connection with one of the front supporting rods, the upper end parts of the rear supporting rods and the lower end parts of the side rods, or the upper end parts of the front supporting rods, the upper end parts of the side rods and the lower end parts of the side rods are in pivot connection with each other around the same axial lead, the upper end parts of the side rods are in pivot connection with the push rods, the supporting rods are in pivot connection with the lower end parts of the rear supporting rods, and the swinging rods are in pivot connection with the lower end parts of the supporting rods and the rear connecting rods.

7. The stroller of claim 6, wherein: the side brackets of each side further comprise seat bars, the rear parts of the seat bars are pivotally connected to the supporting bars, the side bars are pivotally connected with sliding pieces, and the sliding pieces can be arranged on the seat bars in a relatively sliding manner along the length extending direction of the seat bars.

8. The stroller of claim 7, wherein: the frame also comprises a backrest component which is connected with the seat bars at two sides and can stretch along the left-right direction, the backrest component comprises a backrest plate, a first connecting frame, a second connecting frame and a backrest connecting rod component, the backrest connecting rod component is arranged between the backrest plate and the first connecting frame and between the backrest plate and the second connecting frame, the first connecting frame is arranged on the seat bar at one side, the second connecting frame is arranged on the seat bar at the other side, and when the frame is in an unfolding state, the first connecting frame and the second connecting frame are respectively arranged at the left side and the right side of the backrest plate; when the frame is in a folding state, the first connecting frame and the second connecting frame are respectively folded relative to the backboard along the left-right direction, and the backboard moves downwards and is folded with the first connecting frame and the second connecting frame.

9. The stroller of claim 8, wherein: the backrest connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, wherein the first connecting rod and the second connecting rod are mutually intersected and are in pivot connection at the intersection, one end part of the first connecting rod is in pivot connection with the first connecting frame, and the other end part of the first connecting rod is in pivot connection with the third connecting rod; one end part of the third connecting rod is pivotally connected to the second connecting frame, and the other end part of the third connecting rod is connected with the backboard in a manner of relatively rotating and relatively sliding along the left-right direction; one end part of the second connecting rod is pivotally connected to the second connecting frame, and the other end part of the second connecting rod is pivotally connected to the fourth connecting rod; one end of the fourth connecting rod is pivotally connected to the first connecting frame, and the other end of the fourth connecting rod is connected to the backboard in a manner of being capable of relatively rotating and relatively sliding in the left-right direction.

10. The stroller of claim 7, wherein: the transverse strut assembly further comprises a seat connecting rod assembly arranged between the seat rods at two sides, the seat connecting rod assembly comprises a fifth connecting rod and a sixth connecting rod which are mutually intersected and are in pivot connection at the intersection, a seventh connecting rod and an eighth connecting rod which are mutually intersected and are in pivot connection at the intersection, the fifth connecting rod is in pivot connection between one side of the seat rod and one end part of the seventh connecting rod, the other end part of the seventh connecting rod is in pivot connection with the seat rod at the other side, one end part of the sixth connecting rod is in pivot connection with one end part of the eighth connecting rod, the other end part of the sixth connecting rod is in pivot connection with a first sliding piece, the other end part of the eighth connecting rod is in pivot connection with a second sliding piece, the first sliding piece is slidably arranged on the seat rod at one side, and the second sliding piece is slidably arranged on the seat rod at the other side.

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