Stroller

Abstract

This invention relates to a children's stroller, the frame of which includes a front support, a rear support, a lower push rod frame, an upper push rod frame, a rear support frame, and a bottom support frame. In the unfolded state, the front support extends backward at an angle from bottom to top, the rear support extends forward at an angle from bottom to top, the lower push rod frame, the upper push rod frame, and the rear support frame each extend vertically, and the bottom support frame extends horizontally. The overall frame has few components and a simple structure. When folded, only the upper push rod frame needs to be moved downward and backward to activate the rotation of all components in the frame, causing them to fold together. This reduces the size of the folded frame, making it more convenient for users to carry and use.

Description

Technical Field

[0001] This invention relates to the field of children's products, and more specifically to a children's stroller. Background Technology

[0002] Existing strollers have a variety of structures, with different numbers of rods and connections. Consequently, their folding principles, folded shapes, and folded dimensions also vary. The goal that has been continuously pursued by those skilled in the art is to make the stroller frame as simple as possible, folding operation as convenient, and folded size as small as possible while ensuring good stability and normal use performance. Summary of the Invention

[0003] The purpose of this invention is to provide a new type of stroller.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a children's stroller, comprising a frame having an unfolded state and a folded state, a front wheel assembly and a rear wheel assembly disposed at the bottom of the frame, characterized in that: the frame includes a front support, a rear support, a lower push rod frame, an upper push rod frame, a rear support frame and a bottom support frame; in the unfolded state, the front support extends backward at an angle from bottom to top, the rear support extends forward at an angle from bottom to top, the lower push rod frame, the upper push rod frame and the rear support frame each extend in a vertical direction, the bottom support frame extends in a front-rear direction, the front wheel assembly is disposed at the bottom of the front support, and the rear wheel assembly is disposed at the bottom of the rear support.

[0005] The upper part of the front support is rotatably connected to the lower part of the lower push rod frame about a first rotation center line; the upper part of the rear support is rotatably connected to the lower push rod frame about a second rotation center line; the front part of the bottom support frame is rotatably connected to the front support about a third rotation center line; the rear part of the bottom support frame is rotatably connected to the rear support about a fourth rotation center line; the upper part of the lower push rod frame is rotatably connected to the upper push rod frame about a fifth rotation center line; the rear support frame and the rear support frame intersect each other and are rotatably connected at the intersection about a sixth rotation center line; the upper part of the rear support frame is rotatably connected to the lower part of the upper push rod frame about a seventh rotation center line; a sliding member is rotatably connected to the lower part of the rear support frame, and the sliding member is slidably mounted on the bottom support frame along the length extension direction of the bottom support frame.

[0006] Among them, the first rotation center line, the second rotation center line, the third rotation center line, the fourth rotation center line, the fifth rotation center line, the sixth rotation center line, and the seventh rotation center line are parallel to each other. When the frame is in the folded state, the front support, the bottom support, the rear support, the rear support, the lower push rod frame, and the upper push rod frame are retracted towards each other in the front-rear direction.

[0007] In some embodiments, the vehicle frame is in an unfolded state, the front support is connected to the lower push rod frame in the vertical direction, and the third rotation center line, the first rotation center line and the second rotation center line are arranged sequentially from bottom to top.

[0008] In some embodiments, when the frame is in the unfolded state, the second rotation center line, the sixth rotation center line, and the fourth rotation center line are arranged sequentially from top to bottom along the length extension direction of the rear support.

[0009] In some embodiments, during the transition of the frame from an unfolded state to a folded state, the upper push rod frame and the lower push rod frame flip and fold together, the lower push rod frame and the rear support frame flip and fold together behind the rear support frame, and the slider slides forward along the bottom support frame, so that the front support frame, the rear support frame and the bottom support frame fold together in the front-rear direction.

[0010] In some embodiments, the front wheel assembly has two sets disposed on the left and right sides of the bottom of the front support, and the rear wheel assembly has two sets disposed on the left and right sides of the bottom of the rear support. The distance between the two sets of front wheel assemblies in the left-right direction is smaller than the distance between the two sets of rear wheel assemblies in the left-right direction. When the frame is in a folded state, the front support, the bottom support, the rear support, the lower push rod frame, and the upper push rod frame are sequentially retracted in the front-rear direction. The rear support is retracted between the bottom support, the rear support, and the lower push rod frame. The two sets of front wheel assemblies are retracted between the two sets of rear wheel assemblies in the left-right direction. The front wheel assembly and / or the rear wheel assembly together with the lower part of the upper push rod frame are supported on the ground, so that the frame stands upright on the ground.

[0011] In some embodiments, the frame further includes a seat frame extending in a front-rear direction in an unfolded state, the rear of the seat frame being rotatably connected to the rear support frame, and a seat slider being rotatably disposed on the lower push rod frame, the seat slider being slidably disposed on the seat frame along the length extension direction of the seat frame.

[0012] In some embodiments, when the vehicle frame is in the unfolded state, the lower push rod frame and the upper push rod frame extend along the same length direction, and the angle between the length extension direction of the front support and the length extension direction of the lower push rod frame is an obtuse angle.

[0013] In some embodiments, the front support includes two front support rods disposed on the left and right sides and extending in the vertical direction, the rear support includes two rear support rods disposed on the left and right sides and extending in the vertical direction, the lower push rod frame has two lower push rods disposed on the left and right sides and extending in the vertical direction, the bottom support frame includes two bottom support rods disposed on the left and right sides and extending in the front and rear direction, on each side of the frame, the upper part of the front support rod is rotatably connected to the lower part of the lower push rod around the first rotation center line, the upper part of the rear support rod is rotatably connected to the lower push rod around the second rotation center line, and the front part of the bottom support rod is rotatably connected to the front support rod around the third rotation center line.

[0014] In some embodiments, the front strut includes a strut body extending in a vertical direction and a first connector fixed to the strut body. The first connector has at least a connecting section located at the rear of the strut body. When the frame is in an extended state, the connecting section extends obliquely rearward from bottom to top, and the front portion of the bottom strut is rotatably connected to the rear end of the connecting section about the third rotation center line.

[0015] In some embodiments, the front strut further includes a second connector fixed to the upper end of the strut body, and the lower push rod includes a lower push rod body and a third connector fixed to the lower part of the lower push rod body. When the frame is in the unfolded state, the strut body and the lower push rod body abut against each other in the vertical direction, and the second connector and the third connector are located behind the strut body and the lower push rod body and are rotatably connected around the first rotation center line.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: In the stroller of the present invention, the frame only includes a front support, a rear support, a lower push rod frame and an upper push rod frame, a rear support frame and a bottom support frame. It has fewer rods and a simple structure. When folding, it is only necessary to drive the upper push rod frame to move backward and downward, which can drive the rods in the frame to rotate and fold together, so that the size of the folded frame is reduced, which brings convenience to the user's daily carrying and use. Attached Figure Description

[0017] Appendix Figure 1 This is a three-dimensional structural diagram of a children's stroller in its unfolded state according to a specific embodiment of the present invention;

[0018] Appendix Figure 2 For the appendix Figure 1 A three-dimensional structural diagram of a stroller in a semi-folded state;

[0019] Appendix Figure 3 For the appendix Figure 2 A side view diagram of a children's stroller;

[0020] Appendix Figure 4 For the appendix Figure 1 A 3D structural diagram of a stroller in its folded state;

[0021] Appendix Figure 5 For the appendix Figure 4 A side view diagram of a children's stroller;

[0022] The components are as follows: 1. Front support; 11. Front support rod; 11a. Rod body; 11b. First connector; 11b1. Fixing part; 11b2. Connecting section; 11c. Second connector; 12. Front crossbar; 2. Rear support; 21. Rear support rod; 22. Rear crossbar; 3. Lower push rod frame; 31. Lower push rod; 31a. Lower push rod body; 31b. Third connector; 4. Upper push rod frame; 41. Upper push rod; 42. Upper crossbar; 5. Rear support frame; 51. Rear support rod; 6. Bottom support frame; 61. Bottom support rod; 7. Sliding component; 8. Seat rod; 9. Seat sliding component; 10. Front wheel assembly; 20. Rear wheel assembly. Detailed Implementation

[0023] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] The following descriptions of directions such as front, back, left, right, up, and down are defined with reference to the directions observed by the user when pushing the stroller with the frame in the unfolded state. The purpose is solely to clearly illustrate the relative positional relationships of the various rods / components in the stroller.

[0025] See Figures 1 to 5 The stroller shown includes a frame having an unfolded state and a folded state, a front wheel assembly 20 and a rear wheel assembly 30 located at the bottom of the frame, and a locking mechanism (not shown) for locking the frame in the unfolded state.

[0026] The frame includes a front support 1, a rear support 2, a lower push rod frame 3, an upper push rod frame 4, a rear support frame 5, and a bottom support frame 6. When the frame is in its unfolded state, such as... Figure 1 As shown, the front support 1 extends backward at an angle from bottom to top, the rear support 2 extends forward at an angle from bottom to top, the lower push rod frame 3, the upper push rod frame 4, and the rear support frame 5 each extend in the vertical direction, the bottom support frame 6 extends in the front-to-back direction, the front wheel assembly 10 is located at the bottom of the front support 1, and the rear wheel assembly 20 is located at the bottom of the rear support 2.

[0027] The upper part of the front support 1 is rotatably connected to the lower part of the lower push rod frame 3 around the first rotation center line X1. The upper part of the rear support 2 is rotatably connected to the lower push rod frame 3 around the second rotation center line X2. The front part of the bottom support frame 6 is rotatably connected to the front support 1 around the third rotation center line X3. The rear part of the bottom support frame 6 is rotatably connected to the rear support 2 around the fourth rotation center line X4. The upper part of the lower push rod frame 3 is rotatably connected to the upper push rod frame 4 around the fifth rotation center line X5. The rear support frame 5 and the rear support 2 intersect each other and are rotatably connected at the intersection around the sixth rotation center line X6. The upper part of the rear support frame 5 is rotatably connected to the lower part of the upper push rod frame 4 around the seventh rotation center line X7. The lower part of the rear support frame 5 is rotatably connected to a sliding member 7, which is slidably mounted on the bottom support frame 6 along the length extension direction of the bottom support frame 6.

[0028] The first rotation center line X1, the second rotation center line X2, the third rotation center line X3, the fourth rotation center line X4, the fifth rotation center line X5, the sixth rotation center line X6, and the seventh rotation center line X7 all extend horizontally in the left-right direction and are parallel to each other.

[0029] During the transition from the unfolded state to the folded state of the frame, the upper push rod frame 4 and the lower push rod frame 3 flip and fold each other, and the lower push rod frame 3 and the rear support frame 5 flip and fold behind the rear support frame 2. The linkage causes the sliding member 7 to slide forward along the bottom support frame 6, and causes the bottom support frame 6 to rotate, so that the front support frame 1 and the rear support frame 2 fold together in the front-rear direction.

[0030] Specifically, referring to the accompanying drawings, in this embodiment, the various rods and components in the frame are arranged as follows:

[0031] The front support 1 includes two front support rods 11 located on the left and right sides and extending vertically, and a front crossbar 12 fixed between the lower parts of the two front support rods 11 and extending horizontally. Each front support rod 11 has a set of front wheel assemblies 10 at its bottom. The rear support 2 includes two rear support rods 21 located on the left and right sides and extending vertically, and a rear crossbar 22 fixed between the lower parts of the two rear support rods 21 and extending horizontally. Each rear support rod 21 has a set of rear wheel assemblies 20 at its lower part. The distance between the two sets of front wheel assemblies 10 in the horizontal direction is smaller than the distance between the two sets of rear wheel assemblies 20 in the horizontal direction.

[0032] The lower push rod frame 3 includes two lower push rods 31 located on the left and right sides and extending in the vertical direction. The upper push rod frame 4 includes two upper push rods 41 located on the left and right sides and extending in the vertical direction, and an upper crossbar 42 fixed between the upper parts of the two upper push rods 41. The upper crossbar 42 and the upper push rods 41 on both sides form a U-shaped rod with the opening facing downward. The rear support frame 5 includes two rear support rods 51 located on the left and right sides and extending in the vertical direction. The bottom support frame 6 includes two bottom support rods 61 located on the left and right sides and extending in the front and back direction. The rear support frame 5 is located between the two rear support rods 21, the two bottom support rods 61, the two upper push rods 41, and the two lower push rods 31 in the left and right direction.

[0033] On each side of the frame, the upper part of the front support rod 11 is rotatably connected to the lower part of the lower push rod 31 around the first rotation center line X1. The upper part of the rear support rod 21 is rotatably connected to the lower push rod 31 around the second rotation center line X2. The front part of the bottom support rod 61 is rotatably connected to the front support rod 11 around the third rotation center line. When the frame is in the unfolded state, the front support rod 11 and the lower push rod 31 on the same side are connected in the vertical direction. The third rotation center line X3, the first rotation center line X1, and the second rotation center line X2 are arranged sequentially from bottom to top.

[0034] In this embodiment, the front support rod 11 includes a rod body 11a extending in the vertical direction, and a first connector 11b fixed to the rod body 11a. The first connector 11b has a fixing part 11b1 fixed to the rod body 11a, and a connecting section 11b2 located at the rear side of the rod body 11b1. When the frame is in the unfolded state, the connecting section 11b2 extends backward from bottom to top, and the front part of the bottom support rod 61 is rotatably connected to the rear end of the connecting section 11b2 around the third rotation center line X3. In this way, when the frame is in the unfolded state, the third rotation center line X3 can be as close as possible to the top of the rod body 11a, so that the sliding member 7 can slide to the front end of the bottom support rod 61 during the folding process, maximizing the sliding stroke of the sliding member 7, which is beneficial for the bottom support rod 61 and the rear support rod 51 to be folded together as much as possible relative to the front support rod 11 in the front-rear direction when the frame is folded.

[0035] The front support rod 11 also includes a second connector 11c fixed to the upper end of the rod body 11a. The lower push rod 31 includes a lower push rod body 31a and a third connector 31b fixed to the lower part of the lower push rod body 31a. When the frame is in the unfolded state, the rod body 11a and the lower push rod body 31a abut against each other in the vertical direction. The second connector 11c and the third connector 31b are located behind the rod body 11a and the lower push rod body 31a and are rotatably connected around the first rotation center line X1. In this way, during the folding process of the frame, the rod body 11a and the lower push rod body 31a can provide the largest possible gap, so that the rods on the frame, such as the bottom support rod 61, the rear support rod 51, and the rear support rod 21, can be folded between the two, so that each rod can be folded together in a nearly parallel posture, thereby making the rods in the folded frame more compact.

[0036] On the left and right sides of the frame, the upper part of the lower push rod 31a and the upper part of the upper push rod 41a are rotatably connected around the fifth rotation center line X5. The rear support rod 51 and the rear support rod 21 cross each other at the middle position and are rotatably connected around the sixth rotation center line X6. The rear part of the bottom support rod 61 is rotatably connected to the lower part of the rear support rod 21 around the fourth rotation center line X4. The lower part of the rear support rod 51 is rotatably connected to the sliding member 7, which is specifically a sliding sleeve that is slidably fitted onto the bottom support rod 61. The aforementioned fourth rotation center line X4 is higher than the axis of the rear wheel axle in the rear wheel assembly 20 on the rear support rod 21. When the frame is in the unfolded state, along the length extension direction of the rear support rod 21, the second rotation center line X2, the sixth rotation center line X6, and the fourth rotation center line X4 are arranged sequentially from top to bottom along the length extension direction of the rear support rod 21.

[0037] The frame also includes a seat frame. When the frame is in the unfolded state, the seat frame extends in the front-to-back direction. Specifically, the seat frame includes two seat posts 8 located on the left and right sides and extending in the front-to-back direction. The rear part of the seat post is rotatably connected to the rear support rod 51. The connection position is located between the sixth rotation center line X6 and the seventh rotation center line X7 in the length extension direction of the rear support rod 51. A seat slider 9 is rotatably connected to the lower push rod 31. The seat slider 9 is specifically a sliding sleeve that can slide on the seat post 8 in the length extension direction of the seat post 8.

[0038] In summary, see Figure 1 As shown, in the unfolded state of the frame in this embodiment, the angle between the length extension direction of the front support rod 11 and the length extension direction of the lower push rod 31 on the left and right sides of the frame is an obtuse angle. The lower push rod 31 and the upper push rod 41 extend along the same length direction. The bottom support rod 61 extends downward from front to back. The rear support rod 51 is supported in the vertical direction between the push rod 41, the rear support rod 21 and the connecting rod 51. The sliding member 7 is located at the middle position of the bottom support rod 61. The frame structure in the unfolded state is simple.

[0039] When the frame needs to be folded, see [link to relevant documentation]. Figure 2 , Figure 3 As shown, after the locking mechanism on the frame is unlocked, the upper push rod 4 is pushed forward, causing the upper push rod 4 and the lower push rod 3 to rotate and retract relative to each other. At the same time, the upper push rod 4 is driven to move downward, and the lower push rod 3 and the rear support 5 flip backward and retract toward the rear of the rear support 2. This linkage causes the sliding member 7 to slide forward along the bottom support 6, causing the bottom support 6 to rotate relative to the rear support 2. This linkage causes the front support 1 and the rear support 2 to gradually retract in the front-rear direction.

[0040] After folding, the frame is as follows: Figure 5 As shown, the front support 1, bottom support 6, rear support 2, lower push rod frame 3, and upper push rod frame 4 are sequentially folded together in the front-to-back direction. The rear support frame 6 is folded between the bottom support frame 5, rear support 2, and lower push rod frame 3. The two sets of front wheel assemblies 10 are folded together in the left-to-right direction between the two sets of rear wheel assemblies 20. The two sets of front wheel assemblies 10, the two sets of rear wheel assemblies 20, and the lower part of the upper push rod frame 4 together support the ground, allowing the stroller frame to stand upright on the ground. In the folded state, all the rods are tightly folded together, occupying less space, and the structure is relatively flat and compact, bringing convenience to users for daily storage and carrying.

[0041] In other embodiments, the front support 1, the rear support 2, and the lower push rod frame 4 can be configured to fold in the left and right directions, so that the frame can be further folded in the left and right directions when folded, thereby further reducing the volume of the frame after folding.

[0042] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A stroller, comprising a frame having an unfolded state and a folded state, a front wheel assembly and a rear wheel assembly disposed at the bottom of the frame, characterized in that: The frame includes a front support, a rear support, a lower push rod frame, an upper push rod frame, a rear support frame, and a bottom support frame. In the deployed state, the front support extends backward at an angle from bottom to top, and the rear support extends forward at an angle from bottom to top. The lower push rod frame, upper push rod frame, and rear support frame each extend vertically, and the bottom support frame extends longitudinally. The front wheel assembly is located at the bottom of the front support, and the rear wheel assembly is located at the bottom of the rear support. The upper part of the front support is rotatably connected to the lower part of the lower push rod frame about a first rotation center line; the upper part of the rear support is rotatably connected to the lower push rod frame about a second rotation center line; the front part of the bottom support frame is rotatably connected to the front support about a third rotation center line; the rear part of the bottom support frame is rotatably connected to the rear support about a fourth rotation center line; the upper part of the lower push rod frame is rotatably connected to the upper push rod frame about a fifth rotation center line; the rear support frame and the rear support frame intersect each other and are rotatably connected at the intersection about a sixth rotation center line; the upper part of the rear support frame is rotatably connected to the lower part of the upper push rod frame about a seventh rotation center line; a sliding member is rotatably connected to the lower part of the rear support frame, and the sliding member is slidably mounted on the bottom support frame along the length extension direction of the bottom support frame. Among them, the first rotation center line, the second rotation center line, the third rotation center line, the fourth rotation center line, the fifth rotation center line, the sixth rotation center line, and the seventh rotation center line are parallel to each other. When the frame is in the folded state, the front support, the bottom support, the rear support, the rear support, the lower push rod frame, and the upper push rod frame are retracted towards each other in the front-rear direction. When the frame is in the unfolded state, the front bracket and the lower push rod bracket are connected in the vertical direction. The third rotation center line, the first rotation center line and the second rotation center line are arranged sequentially from bottom to top. The second rotation center line, the sixth rotation center line and the fourth rotation center line are arranged sequentially from top to bottom along the length extension direction of the rear bracket. When the frame is folded, the front support, the bottom support, the rear support, the lower push rod frame, and the upper push rod frame are sequentially folded together in the front-to-back direction. The front wheel assembly and / or the rear wheel assembly, together with the lower part of the upper push rod frame, support the frame on the ground, thereby making the frame stand upright on the ground.

2. The stroller according to claim 1, characterized in that: During the transition of the frame from the unfolded state to the folded state, the upper push rod frame and the lower push rod frame flip and fold together, the lower push rod frame and the rear support frame flip and fold together behind the rear support frame, and the sliding member slides forward along the bottom support frame, so that the front support frame, the rear support frame and the bottom support frame fold together in the front-rear direction.

3. The stroller according to claim 1, characterized in that: The front wheel assembly has two sets disposed on the left and right sides of the bottom of the front support, and the rear wheel assembly has two sets disposed on the left and right sides of the bottom of the rear support. The distance between the two sets of the front wheel assembly in the left and right direction is smaller than the distance between the two sets of the rear wheel assembly in the left and right direction. When the frame is in a folded state, the rear support is folded between the bottom support, the rear support and the lower push rod frame, and the two sets of front wheel assemblies are folded between the two sets of rear wheel assemblies in the left and right direction.

4. The stroller according to claim 1, characterized in that: The frame also includes a seat frame that extends in the front-rear direction when unfolded. The rear of the seat frame is rotatably connected to the rear support frame. A seat slider is rotatably provided on the lower push rod frame. The seat slider is slidably provided on the seat frame along the length extension direction of the seat frame.

5. The stroller according to claim 1, characterized in that: When the vehicle frame is in the unfolded state, the lower push rod frame and the upper push rod frame extend along the same length direction, and the angle between the length extension direction of the front support and the length extension direction of the lower push rod frame is an obtuse angle.

6. The stroller according to any one of claims 1 to 5, characterized in that: The front support includes two front support rods located on the left and right sides and extending vertically. The rear support includes two rear support rods located on the left and right sides and extending vertically. The lower push rod frame has two lower push rods located on the left and right sides and extending vertically. The bottom support frame includes two bottom support rods located on the left and right sides and extending forward and backward. On each side of the frame, the upper part of the front support rod is rotatably connected to the lower part of the lower push rod around the first rotation center line. The upper part of the rear support rod is rotatably connected to the lower push rod around the second rotation center line. The front part of the bottom support rod is rotatably connected to the front support rod around the third rotation center line.

7. The stroller according to claim 6, characterized in that: The front strut includes a strut body extending in a vertical direction and a first connector fixed to the strut body. The first connector has at least a connecting section located on the rear side of the strut body. When the frame is in the unfolded state, the connecting section extends backward from bottom to top. The front part of the bottom strut is rotatably connected to the rear end of the connecting section about the third rotation center line.

8. The stroller according to claim 7, characterized in that: The front support rod also includes a second connector fixed to the upper end of the rod body. The lower push rod includes a lower push rod body and a third connector fixed to the lower part of the lower push rod body. When the frame is in the unfolded state, the rod body and the lower push rod body abut against each other in the vertical direction. The second connector and the third connector are located behind the rod body and the lower push rod body and are rotatably connected around the first rotation center line.

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