Stroller

Abstract

The present application discloses a kind of child stroller, including the frame with unfolded state and folding state, front wheel assembly and rear wheel assembly arranged in the bottom of the frame, and locking mechanism for locking the frame in unfolded state, the frame includes front support, rear support, handrail frame, rear support frame, push rod frame, seat frame and connecting link assembly between the front support, rear support and rear support frame, wherein the front part of the seat frame is rotatably connected to the upper part of the rear support or the front part of the handrail frame, so that the seat frame and handrail frame and push rod frame form a seat for children to sit, reduce the length of front support under the premise of ensuring the height of seat, which is beneficial to reduce the overall size of the child stroller after folding, the frame is in folding state, the rear support is shortened in up-down direction and is folded with the front support, the rear support frame, seat frame, handrail frame and push rod frame are folded behind the rear support.

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 come in a variety of structures, with varying numbers of rods and their connections, resulting in different folding principles, folded shapes, and dimensions. Some existing strollers have a seat frame on the frame, where a fabric cover is directly attached to create a seat for the child. Currently, most seat frames are connected to a front support at the front and other rods on the frame at the rear. This typically results in a low seat height. Increasing the seat height would require a longer front support, leading to a larger overall size when folded, increasing production costs, and causing inconvenience for users. Summary of the Invention

[0003] The purpose of this invention is to provide an improved stroller to solve one or more problems of the prior art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: 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, and a locking mechanism for locking the frame in the unfolded state. In the unfolded state, the frame includes:

[0005] A front support bracket that extends obliquely upward from front to rear, with the front wheel assembly located at the bottom of the front support bracket;

[0006] The rear support extends obliquely from rear to front and upward. The rear support includes an upper rear support and a lower rear support that are slidably connected along the length direction. The rear wheel assembly is located at the bottom of the lower rear support.

[0007] The handrail extends in a front-to-back direction, and two of the three parts of the handrail, the upper part of the front support, and the upper part of the rear upper support are rotatably connected, and the third part is rotatably connected to one of the aforementioned two parts; or, the three parts of the handrail, the upper part of the front support, and the upper part of the rear upper support are rotatably connected about the same rotation center line.

[0008] A rear support frame, the rear support frame extending in the vertical direction, the lower part of the rear support frame being rotatably connected to the rear lower bracket;

[0009] A push rod frame extends vertically, the lower part of the push rod frame is rotatably connected to the upper part of the rear support frame, and the rear part of the handrail frame is rotatably connected to the push rod frame;

[0010] A seat frame extending in a front-to-back direction, the front portion of which is rotatably connected to the upper part of the rear support or rotatably connected to the front portion of the armrest frame, and the rear portion of which is rotatably connected to the rear support frame.

[0011] The frame also includes a linkage assembly connecting the front support, the rear support and the rear support frame so that the three can be unfolded or retracted relative to each other in the front-rear direction. When the frame is folded, the rear support is shortened in the vertical direction and retracted to the front support. The rear support frame, the seat frame, the armrest frame and the push rod frame are retracted behind the rear support.

[0012] Preferably, the upper part of the rear upper support, the front part of the armrest frame, and the front part of the seat frame are rotatably connected around a first rotation center line.

[0013] Furthermore, the upper part of the front bracket and the upper part of the rear upper bracket are rotatably connected around a second rotation center line, which is parallel to the first rotation center line.

[0014] Preferably, the stroller further includes an unlocking mechanism for unlocking the locking mechanism. The unlocking mechanism is located on the upper part of the push rod frame. During the transition between the unfolded state and the folded state, the upper part of the push rod frame is always above the lower part of the push rod frame.

[0015] Preferably, when the frame is in a folded state, the front wheel assembly and the rear wheel assembly are folded together and supported on the ground together with the lower part of the push rod frame.

[0016] More preferably, the linkage assembly includes a slider, and a first link and a second link extending in a front-rear direction, the slider being rotatably mounted on the rear lower bracket, the front portion of the first link being rotatably connected to the front bracket, the rear portion of the first link being rotatably connected to the front portion of the second link, the rear portion of the second link being rotatably connected to the strut frame, and the slider being slidably connected to the second link relative to it along the length extension direction of the second link.

[0017] Furthermore, the sliding member is rotatably connected to the upper part of the lower rear bracket, and the sliding member is located above the rotatable connection between the lower rear bracket and the rear support frame on the lower rear bracket.

[0018] Preferably, when the frame is in the unfolded state, the handrail frame is an upwardly arched arc, and the front part of the handrail frame is lower than the rear part of the handrail frame; and / or, the first link and the second link extend obliquely from front to back along the same length direction; and / or, the rear support frame and the push rod frame extend obliquely from bottom to top along the same length direction.

[0019] Preferably, the front support includes two front support rods located on the left and right sides and extending vertically, the upper rear support includes two upper rear support rods located on the left and right sides, and the lower rear support includes two lower rear support rods located on the left and right sides. The upper rear support rods and lower rear support rods on the same side are slidably and telescopically connected. The rear support frame includes two rear support rods located on the left and right sides and extending vertically.

[0020] Each of the left and right sides of the frame is provided with a set of the aforementioned linkage assembly. The linkage assembly is connected between the front support rod, the rear lower support rod, and the rear strut. The sliding member is rotatably connected to the upper part of the rear lower support rod. The front part of the first linkage is connected to the front support rod, and the rear part of the second linkage is connected to the rear strut.

[0021] Furthermore, the upper rear support rod includes a rod body that slides with the lower rear support rod, and a connecting end fixed to the upper part of the rod body. When the frame is in the unfolded state, the connecting end extends obliquely upward from front to back. The upper part of the front support rod is rotatably connected to the lower part of the connecting end. The front part of the seat frame and the front part of the armrest frame are rotatably connected to the upper part of the connecting end around the same rotation center line.

[0022] 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 front part of the seat frame is rotatably connected to the upper part of the rear support or the front part of the armrest frame, so that the seat frame, armrest frame and push rod frame form a seat for the child to sit on, which is beneficial to reduce the length of the front support while ensuring the seat height, thereby reducing the overall size of the stroller after folding. Attached Figure Description

[0023] Appendix Figure 1 This is a three-dimensional structural diagram of a child stroller in its unfolded state according to a specific embodiment of the present invention.

[0024] Appendix Figure 2 For the appendix Figure 1 Side view;

[0025] Appendix Figure 3 For the appendix Figure 1 A side view of a stroller in one of its folding states;

[0026] Appendix Figure 4 For the appendix Figure 1 A side view of the stroller in its folded state;

[0027] Appendix Figure 5 For the appendix Figure 1 A schematic diagram of the rotation center lines between the various links in a children's stroller;

[0028] The components are: 100, frame; 200, front wheel assembly; 300, rear wheel assembly;

[0029] 1. Front support; 11. Front support rod; 12. Horizontal support rod; 2. Rear support; 21. Upper rear support; 211. Upper rear support rod; 211a. Rod body; 211b. Connecting end; 22. Lower rear support; 221. Lower rear support rod; 23. Front connecting rod; 24. Rear connecting rod; 3. Armrest frame; 31. Armrest rod; 4. Rear support frame; 41. Rear support rod; 5. Push rod frame; 51. Push rod; 6. Seat frame; 61. Seat rod; 7. Linkage assembly; 71. Sliding component; 72. First connecting rod; 73. Second connecting rod; 8. Unlocking operation component. Detailed Implementation

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

[0031] The following descriptions of directions such as up, down, left, right, front, back, inside, and outside are defined with reference to the directions observed by the person pushing the stroller when the stroller is in its unfolded state. The purpose is solely to clearly illustrate the relative positional relationships of the various lever components on the stroller.

[0032] See Figures 1 to 5 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 located at the bottom of the frame 100, and a locking mechanism for locking the frame 100 in the unfolded state. In the unfolded state, the frame 100 includes:

[0033] Front bracket 1, the front bracket 1 extends upward and backward at an angle, and the front wheel assembly 200 is located at the bottom of the front bracket 1;

[0034] The rear support 2 extends from the rear to the front and upward at an angle. The rear support 2 includes an upper rear support 21 and a lower rear support 22 that are slidably connected along the length direction. The rear wheel assembly 300 is located at the bottom of the lower rear support 22.

[0035] Handrail 3 extends in the front-to-back direction. Two of the three parts of the handrail 3, the front part of the front support 1 and the upper part of the rear upper support 21 are rotatably connected, and the third part is rotatably connected to one of the aforementioned two parts. Alternatively, the three parts of the handrail 3, the front part of the front support 1 and the upper part of the rear upper support 21 are rotatably connected around the same rotation center line.

[0036] The rear support 4 extends in the vertical direction, and the lower part of the rear support 4 is rotatably connected to the rear lower bracket 22.

[0037] Push rod frame 5 extends in the vertical direction. The lower part of push rod frame 5 is rotatably connected to the upper part of rear support frame 4. The rear part of handrail frame 3 is rotatably connected to push rod frame 5.

[0038] Seat frame 6 extends in the front-to-back direction. The front part of seat frame 6 is rotatably connected to the upper part of rear support 2 or rotatably connected to the front part of armrest frame 3. The rear part of seat frame 6 is rotatably connected to rear support frame 4.

[0039] The frame 100 also includes a linkage assembly 7 that connects the front support 1, the rear support 2 and the rear support frame 4 so that the three can be unfolded or folded relative to each other in the front-rear direction. When the frame 100 is in a folded state, the rear support 2 is shortened in the vertical direction and folded together with the front support 1. The rear support frame 4, the seat frame 6, the armrest frame 3 and the push rod frame 5 are folded behind the rear support 2.

[0040] Referring to the accompanying drawings, the specific structure of the frame 100 in this embodiment is as follows:

[0041] In this embodiment, the upper part of the rear upper support 21, the front part of the armrest frame 3, and the front part of the seat frame 6 are rotatably connected around the first rotation center line X1. The upper part of the front support 1 and the upper part of the rear upper support 21 are rotatably connected around the second rotation center line X2. The first rotation center line X1 and the second rotation center line X2 are parallel to each other and extend in the left and right direction.

[0042] See Figure 1 As shown, the front support 1 includes two front support rods 11 located on the left and right sides and extending in the vertical direction, and a horizontal support rod 12 located between the two front support rods 11 and extending in the horizontal direction; the front wheel assembly 200 includes two sets located on the left and right sides, and the two sets of front wheel assemblies 200 are located at the lower part of the two front support rods 11 respectively.

[0043] The upper rear support 21 includes two upper rear support rods 211 respectively disposed on the left and right sides, and the lower rear support 22 includes two lower rear support rods 221 respectively disposed on the left and right sides. The upper rear support rod 211 and the lower rear support rod 221 on the same side are slidably and telescopically connected. In this embodiment, the upper rear support rod 211 includes a rod body 211a that slides with the lower rear support rod 221, and a connecting end 211b fixed to the upper part of the rod body. When the frame 100 is in the unfolded state, the connecting end 211b extends obliquely upward from front to back.

[0044] See Figure 1 As shown, the rear support 2 also includes a front link 23 and a rear link 24. The front link 23 extends in the left-right direction and is fixedly disposed between two connecting ends 211b. The rear link 24 also extends in the left-right direction. The rear link 24 is located at the lower part of the rear lower support 22 and is fixedly disposed between two rear lower support rods 221. The rear wheel assembly 300 includes two sets located on the left and right sides respectively. The two sets of rear wheel assemblies 300 are located at the lower part of the two rear lower support rods 221 respectively, and the rear support 2 as a whole is located between the two sets of rear wheel assemblies 300 in the left-right direction.

[0045] The armrest frame 3 includes two armrest bars 31 located on the left and right sides. In the unfolded state, each armrest bar 31 is an upwardly arched arc, with the front of the armrest bar 31 lower than the rear of the armrest bar 31. The rear support frame 4 includes two rear support rods 41 located on the left and right sides and extending in the vertical direction. The push rod frame 5 includes two push rods 51 located on the left and right sides and extending in the vertical direction. Here, the two push rods 51 are integrally set and are U-shaped rods with openings facing downwards. The seat frame 6 is a U-shaped rod with openings facing forward. It has two seat rods 61 located on the left and right sides and extending in the front-back direction. In the left-right direction, the seat frame 6 is located between the two armrest bars 31 and the two rear support rods 41.

[0046] Each of the left and right sides of the frame 100 is provided with a set of linkage assemblies 7. The linkage assemblies 7 are connected between the front support rod 11, the rear lower support rod 221 and the rear support rod 41. Each set of linkage assemblies 7 includes a slider 71, and a first link 72 and a second link 73 extending in the front-rear direction. The slider 71 can slide relative to the second link 73 along the length extension direction of the second link 73. Here, the slider 71 is specifically a sliding sleeve, which is slidably sleeved on the second link 73.

[0047] See the left and right sides of the frame 100. Figure 5As shown, the front part of the handrail 31, the front part of the seat rod 61, and the upper part of the connecting end 211b are rotatably connected about the first rotation center line X1. The lower part of the connecting end 211b is rotatably connected about the upper part of the front support rod 11 about the second rotation center line X2. The rear part of the handrail 31 is rotatably connected to the push rod 51 about the third rotation center line X3. The lower part of the push rod 51 is rotatably connected to the upper part of the rear support rod 41 about the fourth rotation center line X4. The lower part of the rear support rod 41 is rotatably connected to the rear lower support rod 2 about the fifth rotation center line X5. In the middle of 21, the rear part of the seat rod 61 is rotatably connected to the rear support rod 41 around the sixth rotation center line X6, the rear part of the second connecting rod 73 is rotatably connected to the rear support rod 41 around the seventh rotation center line X7, the front part of the second connecting rod 73 is rotatably connected to the rear part of the first connecting rod 72 around the eighth rotation center line X8, the front part of the first connecting rod 72 is rotatably connected to the horizontal support rod 12 of the front bracket 1 around the ninth rotation center line X9, and the sliding member 71 is rotatably disposed on the upper part of the rear lower support rod 221 around the tenth rotation center line X10.

[0048] The frame 100 is in the unfolded state, see [reference]. Figure 5 As shown, the first to tenth rotation center lines X1-X10 all extend in the left-right direction. The third rotation center line X3, the fourth rotation center line X4, the sixth rotation center line X6, the seventh rotation center line X7, and the fifth rotation center line X5 are distributed from top to bottom along the length of the rear support rod 41. The seventh rotation center line X7, the eighth rotation center line X8, and the ninth rotation center line X9 are distributed from back to front along the length of the first connecting rod 72 or the second connecting rod 73. The tenth rotation center line X10 is located between the seventh rotation center line X7 and the eighth rotation center line X8.

[0049] The stroller also includes an unlocking mechanism 8 for operating to unlock the locking mechanism, see [link / reference]. Figure 1 As shown, the unlocking operation piece 8 is located on the upper part of the push rod frame 5. After pressing the unlocking operation piece 8, the frame 100 is unlocked.

[0050] The stroller in its unfolded state, see Figure 1 , Figure 2As shown, all locking mechanisms are in the locked state. The rear support frame 4 and push rod frame 5 extend backward from bottom to top along the same length direction. The first connecting rod 72 and the second connecting rod 73 extend backward from front to back and upward along the same length direction. The sliding member 71 is on the rear lower support rod 221 and is located above the rotatable connection between the rear lower support rod 221 and the rear support rod 41. The seat frame 6 is located above the front support 1 and the rear support 2, the armrest frame 3 is located above the seat frame 6, and the front wheel assembly 200 is located in front of the rear wheel assembly 300, and both are supported on the ground. At the same time, the seat rod 61, the rear upper support rod 211, the rear lower support rod 221, and the rear support rod 41 on the same side form a triangular structure, which makes the stroller have good stability and children can sit on the stroller with peace of mind. When the stroller is in this unfolded state, the seat frame 6 is located above the front support 1 and the rear support 2, with a high sitting height, giving children a high field of vision and high sitting comfort.

[0051] When folding the stroller, the operator should stand behind the stroller and first press the unlocking mechanism 8 to release the locking mechanism, then press the rear wheel assembly 300 to prevent it from moving backward. Next, rotate the push rod frame 5 forward around the fourth rotation center line X4, while simultaneously pressing down on the push rod frame 5 to move it downward. See [link to relevant documentation]. Figure 3 As shown, during this process, the armrest frame 3, seat frame 6 and rear support frame 4 all flip backward and fold towards the rear side of the rear support 2, and in conjunction, the upper rear support rod 211 and the lower rear support rod 221 slide and shorten relative to each other. As the rear support frame 4 flips backward around the fifth rotation center line X5, it drives the rear part of the second link 73 to move downward, causing the second link 73 to slide relative to the sliding member 71, and the sliding member 71 to rotate relative to the lower rear support rod 221. The first link 72 and the second link 72 flip relative to each other, thereby causing the front support 1 and the rear support 2 to retract relative to each other in the front-back direction.

[0052] During the transition between the unfolded and folded states of the frame 100, the upper part of the push rod 2 is always positioned above the lower part of the push rod 2, allowing the operator to fold the stroller without bending over.

[0053] For a stroller in its folded state, see [link / reference]. Figure 4As shown, the upper rear support rod 211 and the lower rear support rod 221 of the rear support 2 slide and shorten in length. The front support 1 and the rear support 2 retract in the front-to-back direction. The first connecting rod 72 and the second connecting rod 73 fold relative to each other. The rear support frame 4 and the second connecting rod 73 retract together behind the rear support 2. The seat frame 6 and the armrest frame 3 retract relative to each other behind the rear support frame 4. The push rod frame 5 retracts relative to the seat frame 6, with the upper part of the push rod frame 5 remaining upward. The push rod frame 5 retracts between the two armrest rods 31 of the armrest frame 3 in the left-to-right direction. The front wheel assembly 200 and the rear wheel assembly 300 retract relative to each other. In the left-to-right direction, the two sets of rear wheel assemblies 300 retract between the two sets of front wheel assemblies 200. The lower part of the push rod frame 5, the front wheel assembly 200, and the rear wheel assembly 300 are supported on the ground. The overall height of the folded stroller is approximately the sum of the height of the front support 1 and the height of the front wheel assembly 200.

[0054] In summary, in the stroller of this embodiment, when the stroller is unfolded, a seat frame 6, armrest frame 3, and push rod frame 5 form a seat for the child to sit on. This seat is higher than the front support 1 and can be at a relatively high height. While ensuring the seat height, the length of the front support 1 can be reduced, which helps to reduce the overall size of the stroller after it is folded.

[0055] 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, and a locking mechanism for locking the frame in the unfolded state, characterized in that: In the unfolded state, the frame comprises: a front support extending upwardly from front to back, the front wheel assembly being arranged at the bottom of the front support; a rear support extending upwardly from back to front, the rear support comprising a rear upper support and a rear lower support slidingly connected along the length direction, the rear wheel assembly being arranged at the bottom of the rear lower support; an armrest extending in the front-back direction, the front part of the armrest, the upper part of the front support and the upper part of the rear upper support being rotatably connected, the third one being rotatably connected to one of the first two, or the front part of the armrest, the upper part of the front support and the upper part of the rear upper support being rotatably connected around the same rotation center line; a rear support frame extending in the up-down direction, the lower part of the rear support frame being rotatably connected to the rear lower support; a push rod frame extending in the up-down direction, the lower part of the push rod frame being rotatably connected to the upper part of the rear support frame, the rear part of the armrest being rotatably connected to the push rod frame; a seat frame extending in the front-back direction, the front part of the seat frame being rotatably connected to the upper part of the rear support or the front part of the armrest, the rear part of the seat frame being rotatably connected to the rear support frame, the frame further comprising a linkage assembly connected between the front support, the rear support and the rear support frame to enable the three to unfold or fold in the front-back direction, the frame being in the folded state, the rear support being shortened in the up-down direction and being folded with the front support, the rear support frame, the seat frame, the armrest and the push rod frame being folded behind the rear support, wherein the linkage assembly comprises a sliding member, and a first linkage and a second linkage each extending in the front-back direction, the sliding member being rotatably arranged on the rear lower support, the front part of the first linkage being rotatably connected to the front support, the rear part of the first linkage and the front part of the second linkage being rotatably connected, the rear part of the second linkage being rotatably connected to the rear support frame, the sliding member being relatively slidably connected to the second linkage along the length direction of the second linkage.

2. The stroller of claim 1, wherein: the upper part of the rear upper support, the front part of the armrest and the front part of the seat frame being rotatably connected around a first rotation center line.

3. The stroller of claim 2, wherein: the upper part of the front support and the upper part of the rear upper support being rotatably connected around a second rotation center line, the second rotation center line being parallel to the first rotation center line.

4. The stroller of claim 1, wherein: the stroller further comprising an unlocking operation member for operating to unlock the locking mechanism, the unlocking operation member being arranged on the upper part of the push rod frame, the upper part of the push rod frame being always above the lower part of the push rod frame during the conversion of the frame between the unfolded state and the folded state.

5. The stroller of claim 1, wherein: the frame being in the folded state, the front wheel assembly and the rear wheel assembly being folded with each other and being supported on the ground together with the lower part of the push rod frame.

6. The stroller of any one of claims 1 to 5, wherein: The sliding member is rotatably connected to the upper part of the rear lower support, and is located above the rear lower support at the rotatable connection between the rear lower support and the rear support.

7. The stroller of any one of claims 1 to 5, wherein: In the unfolded state of the vehicle frame, the armrest frame is in an upwardly arched shape, the front part of the armrest frame is lower than the rear part of the armrest frame; and / or, the first connecting rod and the second connecting rod extend upwardly and obliquely from front to back along the same length direction; and / or, the rear support and the push rod frame extend obliquely from bottom to top and rearward along the same length direction.

8. The stroller of any one of claims 1 to 5, wherein: The front support comprises two front support rods arranged on the left and right sides and extending in the up-down direction, the rear upper support comprises two rear upper support rods arranged on the left and right sides, the rear lower support comprises two rear lower support rods arranged on the left and right sides, and the rear upper support rod and the rear lower support rod on the same side are connected in a sliding and telescopic manner; the rear support comprises two rear support rods arranged on the left and right sides and extending in the up-down direction, Each side of the vehicle frame is provided with a set of the connecting rod assembly, and the connecting rod assembly is connected between the front support rod, the rear lower support rod and the rear support rod, wherein the sliding member is rotatably connected to the upper part of the rear lower support rod, the front part of the first connecting rod is connected to the front support rod, and the rear part of the second connecting rod is connected to the rear support rod.

9. The stroller of claim 8, wherein: The rear upper support rod comprises a rod body in sliding cooperation with the rear lower support rod, and a connecting end head fixedly arranged on the upper part of the rod body, the connecting end head extends obliquely upward from front to back in the unfolded state of the vehicle frame, the upper part of the front support rod is rotatably connected to the lower part of the connecting end head, and the front part of the seat frame and the front part of the armrest frame are rotatably connected to the upper part of the connecting end head about the same rotation center line.

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