Strollers

Abstract

The present invention relates to a child stroller, comprising a frame having an expanded state and a folded state, and a front wheel assembly and a rear wheel assembly arranged at the bottom of the frame. In the expanded state, the frame comprises: a front bracket, a rear bracket, a support frame, and a lower push rod frame. The upper portion of the rear bracket is rotatably connected to the upper portion of the front bracket; the support frame extends forward and upward from the upper portion of the rear bracket, and the support frame can be relatively slidably connected to the rear bracket along the length extension direction of the rear bracket; the lower portion of the lower push rod frame is rotatably connected to the front bracket, and the lower portion of the support frame is rotatably connected to the lower push rod frame. When the frame is in the folded state, the support frame and the rear bracket slide and retract along the length direction, and the lower push rod frame flips backward and retracts with the rear bracket and the front bracket. The child stroller has a simple structure and a simple folding principle. The entire stroller can be folded by simply folding the push rod frame backward.

Description

Technical Field

[0001] The present invention relates to the field of children's products, in particular to a children's stroller. Background Art

[0002] In the prior art, foldable strollers have different structures and folding principles. However, how to minimize the overall size of the stroller after folding while providing stable load support has always been a goal pursued by those skilled in the art. Summary of the Invention

[0003] The purpose of the present invention is to provide a new child stroller.

[0004] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a child stroller, comprising a frame having an unfolded state and a folded state, and a front wheel assembly and a rear wheel assembly provided at the bottom of the frame. In the unfolded state, the frame comprises:

[0005] A front bracket, the front bracket extending obliquely from bottom to top and rearward, the front wheel assembly being arranged at the bottom of the front bracket;

[0006] a rear bracket, the rear bracket extending obliquely forward from bottom to top, the rear wheel assembly being disposed at a bottom of the rear bracket, the upper portion of the rear bracket being rotatably connected to the upper portion of the front bracket around a first rotation centerline;

[0007] a support frame, the support frame extending forward and upward obliquely from the upper portion of the rear support frame, the support frame being slidably connected to the rear support frame along a lengthwise extension direction of the rear support frame;

[0008] The push rod frame at least includes a lower push rod frame, the lower push rod frame extends from bottom to top and backward, the lower part of the lower push rod frame is rotatably connected to the front bracket around the second rotation center line, and the lower part of the support frame is rotatably connected to the lower push rod frame around the third rotation center line.

[0009] Among them, the first rotation center line, the second rotation center line and the third rotation center line are parallel to each other, and the frame is in a folded state, the support frame and the rear bracket slide and fold together along the length direction, and the lower push rod frame flips backward and folds together with the rear bracket and the front bracket.

[0010] Preferably, when the vehicle frame is in the unfolded state, the support frame and the rear bracket extend along the same length direction, and the support frame and the rear bracket are slidably connected to each other along the length direction.

[0011] Furthermore, the rear bracket has two rear support rods respectively arranged on the left and right sides and extending in the up-down direction, and the support frame has two support rods respectively arranged on the left and right sides and extending in the up-down direction. On the left and right sides of the frame, the lower part of the support rod is slidably inserted into the rod cavity of the rear support rod, and the rear support rod is provided with a slide groove extending in the up-down direction. The push rod frame is rotatably connected to the support rods on both sides by a rotating shaft, and the rotating shaft can be slidably inserted in the slide groove on both sides.

[0012] Furthermore, the lower push rod frame includes a lower push rod extending in the up and down direction, and a connecting rod fixed on the lower push rod and extending in the left and right direction. The left and right ends of the connecting rod are rotatably connected to the support rods on both sides through the rotating shaft respectively.

[0013] Preferably, the lower push rod frame includes a lower push rod, and the lower push rod has a hollow rod cavity extending axially therethrough. The push rod frame also includes an upper push rod, and the upper push rod can be slidably fitted into the hollow rod cavity. When the frame is in the unfolded state, the upper push rod extends upward and obliquely backward from the upper part of the lower push rod; when the frame is in the folded state, the lower part of the upper push rod extends from the lower part of the lower push rod to the outside of the hollow rod cavity.

[0014] Furthermore, the upper push rod includes an upper rod body and a limiting end fixed to the lower end of the upper rod body. The upper rod body and the limiting end can be slidably fitted into the hollow rod cavity. The upper part of the lower push rod is also provided with a limiting member for limiting the limiting end from passing upward out of the hollow rod cavity.

[0015] Preferably, the front bracket has a front bracket body, and a front connecting head fixed on the upper part of the front bracket body and extending downward, the rear bracket has a rear bracket body, and a rear connecting head fixed on the upper part of the rear bracket body and extending downward, the upper end of the front bracket body is rotatably connected to the rear connecting head around the first rotation center line, the lower part of the push rod frame is rotatably connected to the front connecting head around the second rotation center line, and the frame is in the expanded state, and the second rotation center line is located below the first rotation center line.

[0016] Preferably, when the vehicle frame is in the unfolded state, an accommodating area for installing a seat device is formed between the upper portion of the support frame and the push rod frame.

[0017] Furthermore, the seat device includes at least a seat plate extending in the front-to-back direction, the front portion of the seat plate is rotatably connected to the upper portion of the support frame, and when the frame is in the unfolded state, the seat plate is located as a whole in front of the push rod frame in the front-to-back direction; when the frame is in the folded state, the seat plate and the rear bracket are retracted into each other.

[0018] Furthermore, the seat device also includes a flexible bearing member, which has at least a first position connected to the upper part of the support frame or the seat plate, a second position connected to the lower push rod frame, and a third position connected to the upper part of the push rod frame on the frame, wherein when the frame is in the unfolded state, the first position is located in front of the second position and the third position, and the first position is higher than the second position, and the third position is higher than the second position and the first position.

[0019] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the child stroller of the present invention has a simple structure, fewer rods, and a simple folding principle. The frame can be folded by folding the push rod frame backward. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attachment Figure 1 This is a schematic diagram of the three-dimensional structure of a child stroller in an unfolded state according to a specific embodiment of the present invention;

[0021] Attachment Figure 2 For attachment Figure 1 Schematic diagram of the three-dimensional structure after removing the seat device and the flexible bearing member;

[0022] Attachment Figure 3 For attachment Figure 2 A magnified schematic diagram of point A in the middle;

[0023] Attachment Figure 4 For attachment Figure 2 A schematic side view of a child stroller;

[0024] Attachment Figure 5 For attachment Figure 4 Schematic diagram of a child stroller during folding;

[0025] Attachment Figure 6 For attachment Figure 4 A schematic diagram of a child stroller in a folded state;

[0026] Among them: 100, frame; 200, front wheel assembly; 300, rear wheel assembly;

[0027] 1. Front bracket; 11. Front bracket body; 111. Front support rod; 112. Front connecting rod; 113. Front cross bar; 12. Front connector; 2. Rear bracket; 21. Rear bracket body; 211. Rear support rod; 211a. Slide; 212. Rear cross bar; 22. Rear connector; 3. Support frame; 31. Support rod; 4. Push rod frame; 41. Lower push rod frame; 411. Rotating shaft; 412. Lower Push rod; 412a, limiter; 413, connecting rod; 414, lower connector; 415, hook; 42, upper push rod; 421, upper rod body; 421a, first rod body; 421b, second rod body; 422, limiter end; 423, push handle; 5, seat device; 51, seat plate; 511, fixing member; 52, flexible bearing member; 521, support portion; 522, enclosure portion;

[0028] X1, first rotation center line; X2, second rotation center line; X3, third rotation center line. DETAILED DESCRIPTION

[0029] The following descriptions of directions such as up, down, left, right, front, back, inside, and outside are defined with reference to the directions as viewed by a person pushing the stroller when the stroller is in the unfolded state. Their purpose is solely to clearly illustrate the relative positional relationships of the various rods and components on the stroller.

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] See also Figures 1 to 6 The stroller shown includes a frame 100 having an unfolded state and a folded state, a front wheel assembly 200 and a rear wheel assembly 300 disposed at the bottom of the frame 100. In the unfolded state, the frame 100 includes:

[0032] The front bracket 1 extends obliquely from bottom to top and backward, and the front wheel assembly 200 is provided at the bottom of the front bracket 1;

[0033] The rear bracket 2 extends obliquely forward from bottom to top, the rear wheel assembly 300 is provided at the bottom of the rear bracket 2, and the upper portion of the rear bracket 2 is rotatably connected to the upper portion of the front bracket 1 around the first rotation centerline X1;

[0034] The support frame 3 extends forward and upward from the upper portion of the rear bracket 2, and the support frame 3 can be relatively slidably connected to the rear bracket 2 along the length extension direction of the rear bracket 2;

[0035] The push rod frame 4 includes at least a lower push rod frame 41, which extends from bottom to top and rearwardly. The lower portion of the lower push rod frame 41 is rotatably connected to the front bracket 1 about the second rotation centerline X2, and the lower portion of the support frame 3 is rotatably connected to the lower push rod frame 41 about the third rotation centerline X3. The first rotation centerline X1, the second rotation centerline X2, and the third rotation centerline X3 are parallel to each other.

[0036] When the vehicle frame 100 is in the folded state, the support frame 3 and the rear frame 2 slide and close together along the length direction, and the lower push rod frame 41 flips backward and closes together with the rear frame 2 and the front frame 1.

[0037] Referring to the accompanying drawings, the structure of the vehicle frame 100 of this embodiment is as follows:

[0038] The front frame 1 includes a front frame body 11 and a front connector 12 fixedly mounted on the upper portion of the front frame body 11 and extending downward. The rear frame 2 includes a rear frame body 21 and a rear connector 22 fixedly mounted on the upper portion of the rear frame body 21 and extending downward. The upper end of the front frame body 11 and the rear connector 22 are rotationally connected about a first rotation centerline X1. The lower portion of the lower push rod bracket 41 is rotationally connected to the front connector 12 about a second rotation centerline X2. When the vehicle frame 100 is in the deployed state, the second rotation centerline X2 is located below the first rotation centerline X1.

[0039] Specifically, the front bracket body 11 includes a front support rod 111 extending in the up-down direction and a front connecting rod 112 extending in the left-right direction. The front support rod 111 includes two groups located on the left and right sides. The two groups of front support rods 111 are parallel to each other and arranged at a distance. The front connecting rod 112 is connected to the upper end parts of the two groups of front support rods 111. The front connecting head 12 is fixed to the middle part of the front connecting rod 112. In the unfolded state, the front connecting head 12 extends downward and forward from the middle part of the front connecting rod 112, and its extension direction forms an acute angle with the length extension direction of the front support rod 111. The rear support body 21 includes a rear support rod 211 extending in the vertical direction. The rear support rod 211 includes two groups located on the left and right sides. The spacing between the upper ends of the rear support rods 211 in the horizontal direction is smaller than the spacing between the lower ends in the horizontal direction. The rear connectors 22 include two groups located on the left and right sides. The two groups of rear connectors 22 are respectively fixed to the upper ends of the two groups of rear support rods 211. Both groups of rear connectors 22 extend downward from the bottom of each side rear support rod 211, and their extension direction is perpendicular to the length extension direction of the rear support rod 211. The lower push rod frame 41 includes a lower push rod 412 extending in the vertical direction and a lower connector 414 fixed to the lower portion of the lower push rod 412 and extending forward. The lower connector 414 extends in a direction perpendicular to the length extension direction of the lower push rod 412.

[0040] See also Figures 2 to 4As shown, the front connecting rod 112 of the front bracket body 11 is located between the two groups of rear connecting heads 22 along the left-right direction, and the front connecting rod 112 is rotatably connected to the two groups of rear connecting heads 22 around its own axis, and the axis of the front connecting rod 112 constitutes the above-mentioned first rotation center line X1; the lower connecting head 414 of the lower push rod frame 41 is rotatably connected to the front connecting head 12 around the second rotation center line X2, and the first rotation center line X1 and the second rotation center line X2 both extend horizontally along the left-right direction.

[0041] The front frame body 11 further includes a front crossbar 113 extending in the left-right direction, which is fixed to the lower ends of the two sets of front support rods 111. The rear frame body 21 further includes a rear crossbar 212 extending in the left-right direction, which is fixed to the lower ends of the two sets of rear support rods 211. The front wheel assembly 200 and the rear wheel assembly 300 each include two sets located on the left and right sides of the frame 100, with the two sets of front wheel assemblies 200 respectively located at the left and right ends of the front crossbar 113, and the two sets of rear wheel assemblies 300 respectively located at the left and right ends of the rear crossbar 212.

[0042] In this embodiment, the rear support rod 211 is provided with a rod cavity extending in the longitudinal direction. The support frame 3 has two support rods 31, one on each left and one on the right, both extending in the vertical direction. The lower portions of the support rods 31 on each side of the vehicle frame 100 are slidably inserted into the rod cavity of the rear support rod 211. Each rear support rod 211 is also provided with a slide groove 211a extending in the vertical direction. The two sets of slide grooves 211a in the left and right directions are located on the opposite sides of the two sets of rear support rods 211. The lower push rod frame 41 is rotatably connected to the support rods 31 on both sides via a rotation shaft 411, which is slidably inserted into the slide grooves 211a on both sides. Specifically, the lower push rod frame 41 includes a connecting rod 413 fixed on the lower push rod 412 and extending in the left and right directions. The lower push rod 412 is located in the middle of the connecting rod 413. The connecting rod 413 is located above the lower connecting head 414 along the length direction of the lower push rod 412. The rotating shaft 411 includes two groups located on the left and right sides. The axis lines of the two groups of rotating shafts 411 extend colinearly with the third rotation center line X3. The left and right ends of the connecting rod 413 are respectively rotatably connected to the support rod 31 in the rod cavity of the rear support rods 211 on both sides through the rotating shaft 411.

[0043] The lower push rod 412 has a hollow rod cavity extending axially therethrough. The push rod frame 4 further includes an upper push rod 42, which is slidably disposed within the hollow rod cavity. Specifically, the upper push rod 42 includes an upper rod body 421 and a stopper head 422 fixed to the lower end of the upper rod body 421. The upper rod body 421 and the stopper head 422 are slidably disposed within the hollow rod cavity of the lower push rod 412. A stopper member 412a is further provided on the upper portion of the lower push rod 412 for limiting the stopper head 422 from passing upwardly out of the hollow rod cavity. In this embodiment, the upper rod body 421 includes a first rod body 421a and a second rod body 421b extending in the same direction. The first rod body 421a is slidably connected to the upper part of the second rod body 421b. The second rod body 421b has a hollow cavity. The first rod body 421a can be slidably folded into the hollow cavity of the second rod body 421b. The limiting end 422 is arranged at the lower end of the second rod body 421b; the upper push rod 42 also includes a push handle rod 423, which extends in the left and right directions, and its left and right ends are bent forward. The middle part of the push handle rod 423 is fixedly connected to the upper end of the first rod body 421a.

[0044] The frame 100 is further provided with a seat assembly 5. In this embodiment, the seat assembly 5 includes a seat plate 51 extending in the front-to-back direction. The front portion of the seat plate 51 is rotatably connected to the upper portion of the support frame 3. Specifically, the front portion of the seat plate 51 is rotatably connected to the upper ends of the two support rods 31. A stopper is provided between the seat plate 51 and the support frame 3 to limit the rotation direction of the seat plate 51, so that the seat plate 51 can only rotate rearward relative to the support frame 3.

[0045] The seat device 5 further comprises a flexible bearing member 52, which has at least a first position a connected to the upper portion of the support frame 3 or the seat plate 51, a second position b connected to the lower push rod frame 41, and a third position c connected to the upper portion of the push rod frame 4, wherein, see Figure 4 As shown, the frame 100 is in the unfolded state, the first position a is located in front of the second position b and the third position c, and the first position a is higher than the second position b, and the third position c is higher than the second position b and the first position a.

[0046] In this embodiment, a fixing member 511 is provided at the bottom of the seat plate 51, and the front portion of the flexible support member 52 is connected to the fixing member 511. A hook 415 is provided in the middle portion of the lower push rod 412, which is located above the connecting rod 413. The middle portion of the flexible support member 52 is hung on the hook 415. The upper portion of the flexible support member 52 is connected to the left and right ends of the push handle rod 423. In other words, the connection positions of the flexible support member 52 at the fixing member 511, the connection position at the hook 415, and the connection position at the push handle rod 423 sequentially constitute the first position a, the second position b, and the third position c described above.

[0047] See also Figure 1 As shown, when the frame 100 is in the unfolded state, along the front-to-back direction, the portion of the flexible supporting member 51 located between the fixing member 511 and the hook 415 constitutes a supporting portion (not shown in the figure) for supporting the seat plate 51, and the portion of the flexible supporting member 52 located between the hook 415 and the left and right ends of the push handle rod 423 constitutes a supporting portion 521 for providing back support, and the portion located between the left and right side surfaces constitutes a barrier portion 522 based on lateral protection of children.

[0048] The frame 100 is in the unfolded state, see Figures 1 to 4 As shown, the front bracket 1 and the rear bracket 2 are relatively unfolded, the front wheel assembly 200 and the rear wheel assembly 300 are respectively located on the front and rear sides of the frame 100 and are jointly supported on the ground; the first rod body 421a and the second rod body 421b are relatively unfolded, and the upper push rod 42 extends upward and backward from the upper part of the lower push rod 412; the support frame 3 and the rear bracket 2 extend along the same length direction, and the support rod 31 extends upward and forward from the upper part of the rear support rod 211; a accommodating area for installing the seat device 5 is formed between the upper part of the support frame 3 and the push rod frame 4, and the seat plate 51 is located in front of the push rod frame 4 as a whole along the front and rear direction and is located in the above-mentioned accommodating area. The child sits in the flexible bearing member 52 and sits on the seat plate 51, which is more comfortable than an ordinary child stroller. In this state, the caregiver can push the push rod frame 4 to drive the stroller forward.

[0049] When the frame 100 needs to be folded, refer to Figure 5 As shown, the first rod body 421a is slid relative to the second rod body 421b to shorten the length for folding, and at the same time, the upper push rod 42 is slid relative to the lower push rod 412 to fold the two together. During the folding process, the flexible bearing member 52 relaxes so that the seat plate 51 can be folded backward relative to the support frame 3; the folded push rod frame 4 is flipped backward and folded relative to the rear bracket 2. During this process, the two sets of rotating shafts 411 slide downward along the slide groove 211a on the same side, and the connecting rod 413 moves downward along the length direction of the rear bracket 2. The connecting rod 413 drives the support rod 31 into the rod cavity of the rear support rod 211 through the rotating shaft 411. The lower connecting head 414 drives the front connecting head 12 to move backward during the flipping of the push rod frame 4, driving the front bracket 1 to rotate and fold relative to the rear bracket 2.

[0050] The frame 100 is in the folded state, see Figure 6 As shown, the lower part of the upper push rod 42 extends from the lower part of the lower push rod 412 to the outside of the hollow rod cavity, the upper push rod 42 and the lower push rod 412 are folded together and folded together with the rear bracket 2, the seat plate 51 and the rear bracket 2 are folded together, the front bracket 1 is folded in front of the rear bracket 2, and the two sets of front wheel assemblies 200 are folded between the two sets of rear wheel assemblies 300 in the left and right directions.

[0051] In summary, the stroller of the present embodiment has a small number of rods and a simple structure. The entire stroller can be folded by simply driving the push rod frame 4 to fold backward. The folding principle is simple and the operation is convenient. The maximum size of the stroller after folding mainly depends on the height after the support frame and the rear bracket slide and retract relative to each other. Its size is relatively small, which is convenient for carrying and storage.

[0052] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A child stroller comprising a frame capable of being unfolded and folded, and a front wheel assembly and a rear wheel assembly disposed at the bottom of the frame, characterized in that: In the unfolded state, the frame comprises: A front bracket, the front bracket extending obliquely from bottom to top and rearward, the front wheel assembly being arranged at the bottom of the front bracket; a rear bracket, the rear bracket extending obliquely forward from bottom to top, the rear wheel assembly being disposed at a bottom of the rear bracket, the upper portion of the rear bracket being rotatably connected to the upper portion of the front bracket around a first rotation centerline; a support frame, the support frame extending forward and upward obliquely from the upper portion of the rear support frame, the support frame being slidably connected to the rear support frame along a lengthwise extension direction of the rear support frame; The push rod frame at least includes a lower push rod frame, the lower push rod frame extends from bottom to top and backward, the lower part of the lower push rod frame is rotatably connected to the front bracket around the second rotation center line, and the lower part of the support frame is rotatably connected to the lower push rod frame around the third rotation center line. Among them, the first rotation center line, the second rotation center line and the third rotation center line are parallel to each other, and the frame is in a folded state, the support frame and the rear bracket slide and fold together along the length direction, and the lower push rod frame flips backward and folds together with the rear bracket and the front bracket.

2. The stroller according to claim 1, characterized in that: When the vehicle frame is in an unfolded state, the support frame and the rear bracket extend along the same length direction, and the support frame and the rear bracket are slidably connected to each other along the length direction.

3. The stroller according to claim 2, characterized in that: The rear bracket has two rear support rods respectively arranged on the left and right sides and extending in the up-down direction. The support frame has two support rods respectively arranged on the left and right sides and extending in the up-down direction. On the left and right sides of the frame, the lower part of the support rod is slidably inserted into the rod cavity of the rear support rod. The rear support rod is provided with a slide groove extending in the up-down direction. The lower push rod frame is rotatably connected to the support rods on both sides by a rotating shaft, and the rotating shaft can be slidably inserted in the slide groove on both sides.

4. The stroller according to claim 3, characterized in that: The lower push rod frame includes a lower push rod extending in the up-down direction, and a connecting rod fixed on the lower push rod and extending in the left-right direction. The left and right ends of the connecting rod are rotatably connected to the support rods on both sides through the rotating shaft respectively.

5. The stroller according to claim 1, characterized in that: The lower push rod frame includes a lower push rod, and the lower push rod has a hollow rod cavity extending axially therethrough. The push rod frame also includes an upper push rod, and the upper push rod can be slidably fitted into the hollow rod cavity. When the frame is in the unfolded state, the upper push rod extends upward and backward from the upper part of the lower push rod; when the frame is in the folded state, the lower part of the upper push rod extends from the lower part of the lower push rod to the outside of the hollow rod cavity.

6. The stroller according to claim 5, characterized in that: The upper push rod includes an upper rod body and a limiting end fixed to the lower end of the upper rod body. The upper rod body and the limiting end can be slidably fitted into the hollow rod cavity. The upper part of the lower push rod is also provided with a limiting member for limiting the limiting end from passing upward out of the hollow rod cavity.

7. The stroller according to claim 1, characterized in that: The front bracket has a front bracket body, and a front connecting head fixedly arranged on the upper part of the front bracket body and extending downward, the rear bracket has a rear bracket body, and a rear connecting head fixedly arranged on the upper part of the rear bracket body and extending downward, the upper end part of the front bracket body is rotatably connected to the rear connecting head around the first rotation center line, the lower part of the push rod frame is rotatably connected to the front connecting head around the second rotation center line, and when the frame is in the expanded state, the second rotation center line is located below the first rotation center line.

8. The stroller according to any one of claims 1 to 7, characterized in that: When the vehicle frame is in the unfolded state, an accommodating area capable of installing a seat device is formed between the upper portion of the support frame and the push rod frame.

9. The stroller according to claim 8, characterized in that: The seat device at least includes a seat plate extending in the front-to-back direction, the front portion of the seat plate is rotatably connected to the upper portion of the support frame, and when the frame is in the unfolded state, the seat plate is entirely located in front of the push rod frame in the front-to-back direction; When the vehicle frame is in a folded state, the seat plate and the rear bracket are folded together.

10. The stroller according to claim 9, characterized in that: The seat device also includes a flexible bearing member, which has at least a first position connected to the upper part of the support frame or the seat plate, a second position connected to the lower push rod frame, and a third position connected to the upper part of the push rod frame on the frame, wherein when the frame is in the unfolded state, the first position is located in front of the second position and the third position, and the first position is higher than the second position, and the third position is higher than the second position and the first position.

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