Foldable baby carriage

Abstract

The utility model provides a foldable baby carriage which comprises a carriage frame and a folding mechanism, the carriage frame comprises a rear wheel support, a front wheel support and a bracket, one end of the rear wheel support is provided with a joint, a first lock key groove is arranged in the joint, the front wheel support is pivoted on the joint, the bracket is pivoted on the joint, the bracket is provided with a bayonet, and the bayonet is connected with the folding mechanism. The folding mechanism can be connected to the frame in a mode of being switched between an unfolded state and a folded state, the folding mechanism comprises a control piece, a first pull rope, a locking key and a linkage piece, the control piece is pivoted to the bracket, one end of the first pull rope is connected to the control piece, the locking key can be movably arranged in the first locking key groove, the linkage piece is pivoted to the bracket, and the first pull rope is connected to the linkage piece. When the folding mechanism is in an unfolded state, the locking key is embedded into the bayonet, when the folding mechanism is in a folded state, the control piece pushes the locking key to retreat from the bayonet, and the baby carriage can be folded through the structure, and the size of the baby carriage is greatly reduced.

Description

Technical Field

[0001] This utility model mainly relates to a stroller, and more particularly to a foldable stroller. Background Technology

[0002] Existing strollers typically consist of a frame and a backrest and seat mounted on the frame. When folding the stroller, it is usually necessary to operate the frame, backrest, and seat separately to fold them all. This method of folding strollers is cumbersome and inconvenient. Utility Model Content

[0003] The main purpose of this invention is to provide a foldable stroller.

[0004] This utility model provides a foldable stroller, comprising a frame and a folding mechanism. The frame includes a rear wheel support, a front wheel support, a bracket, and a push rod. One end of the rear wheel support has a joint with a first locking key groove. The front wheel support is pivotally mounted to the joint about a front axle. The bracket is pivotally mounted to the joint about a rear axle and has a latch along its radial outer periphery. The push rod is pivotally mounted to the bracket between an unfolded and a folded position. The folding mechanism is switchably connected to the frame between the unfolded and folded states. The folding mechanism includes a first pulley, a control component, a first pull cord, a locking key, and a linkage. The first pulley is pivotally mounted to the push rod. The control element is pivotally mounted on the bracket. One end of the first pull rope is connected to the first pulley and the other end is connected to the control element. The locking key is radially movable along the rear axle and is disposed in the first locking key groove. The linkage is pivotally connected to the front wheel bracket about a first axis and pivotally connected to the bracket about a second axis. The front axle, the rear axle, the first axis, and the second axis are parallel to each other. When the folding mechanism is in the unfolded state, the locking key is inserted into the latch, preventing the bracket from rotating relative to the rear wheel bracket. When the push rod rotates to the reverse folding position, it can switch the folding mechanism to the folded state. When the folding mechanism is in the folded state, the control element pushes the locking key out of the latch, allowing the bracket and the front wheel bracket to rotate synchronously relative to the rear wheel bracket. The stroller can be folded and its volume greatly reduced through the above structure.

[0005] The front wheel bracket has a second locking keyway along a direction parallel to the front axle. The second locking keyway includes a movable part and a locking part. The movable part is arc-shaped with the front axle as the center. The locking part connects to the movable part and extends radially along the front axle. When the folding mechanism is in the unfolded state, the locking key is located in the locking part, preventing the front wheel bracket from rotating relative to the rear wheel bracket. When the folding mechanism is in the folded state, the locking key moves to the movable part, and when the front wheel bracket rotates, the locking key moves within the movable part.

[0006] The rear wheel bracket is provided with two stabilizing blocks and two elastic elements. The two stabilizing blocks are respectively disposed on opposite sides of the rear wheel bracket along the rear axle axis and are movable radially along the rear axle. The two stabilizing blocks are respectively connected to opposite ends of the locking key. The two elastic elements are connected to the two stabilizing blocks. One end of the elastic element abuts against the rear wheel bracket and the other end abuts against the stabilizing block. The elastic element can push the stabilizing block to drive the locking key to move closer to the rear axle.

[0007] The rear wheel bracket is provided with a limiting rod in a direction parallel to the front axle, and the front wheel bracket is provided with a limiting groove in a direction parallel to the front axle. The limiting groove is arc-shaped with the front axle as the center, and the limiting rod is movably inserted into the limiting groove.

[0008] The bracket is provided with a plug, a plug spring, and a crossbar. The plug is radially movable within the bracket along the rear axle. The plug spring is located within the bracket, with one end abutting against the bracket and the other end abutting against the plug. The plug spring can push the plug to move away from the rear axle. The plug has a closed end opposite to the plug spring, which is located within the latch. One end of the crossbar is slidably connected to the control element, and the other end is connected to the plug. When the folding mechanism is in the unfolded state, the closed end abuts against the locking key. When the folding mechanism is in the folded state, the closed end moves away from the rear axle and blocks the latch.

[0009] The folding mechanism includes a reset elastic element that is sleeved on the first pull rope. One end of the reset elastic element abuts against the bracket and the other end abuts against the control element.

[0010] The bracket is provided with a first locking part, and the push rod is provided with a shaft, a second locking part, and a button. The shaft passes through the first locking part and is pivotally mounted on the bracket. The first locking part and the second locking part are adjacent to and surround the shaft. The folding mechanism includes a second rope pulley and a locking member. The second rope pulley is rotatably sleeved on the shaft and disposed in the second locking part. The second rope pulley is connected to a second pull rope. One end of the second pull rope opposite to the second rope pulley is connected to the button. The locking member is axially movable on the shaft. When the button is released, the locking member simultaneously engages the first locking part and the second locking part, keeping the push rod in the unfolded position. Pressing the button can drive the second rope pulley to rotate through the second pull rope, and the second rope pulley can push the locking member to move towards the bracket and disengage from the second locking part, allowing the push rod to rotate relative to the bracket.

[0011] The stroller provided by this utility model can be folded and its size greatly reduced through the above-described structure. Attached Figure Description

[0012] Figure 1 This is a three-dimensional view of the foldable stroller of this utility model.

[0013] Figure 2 This is an exploded perspective view of the foldable stroller button of this utility model.

[0014] Figure 3 This is an exploded perspective view of the foldable stroller push rod of this utility model.

[0015] Figure 4 This is an exploded perspective view of the foldable stroller push rod of this utility model.

[0016] Figure 5 This is a three-dimensional exploded view of the joint of the foldable stroller of this utility model.

[0017] Figure 6 This is an exploded perspective view of the joint of the foldable stroller of this utility model.

[0018] Figure 7 This is a cross-sectional view of the foldable stroller button of this utility model.

[0019] Figure 8 This is a cross-sectional view of the unfolded position of the foldable stroller push rod of this utility model.

[0020] Figure 9 along Figure 8 A cross-sectional view of the second pull rope taken from the 9-9 clue.

[0021] Figure 10 along Figure 8A cross-sectional view of the first pull rope taken from the 10-10 clue.

[0022] Figure 11 This is a cross-sectional view of the joint structure of the folding mechanism of the foldable stroller of this utility model in the unfolded state.

[0023] Figure 12 This is a cross-sectional view of the joint structure of the folding mechanism of the foldable stroller of this utility model in the unfolded state.

[0024] Figure 13 This is a cross-sectional view of the joint structure of the folding mechanism of the foldable stroller of this utility model in the unfolded state, from another perspective.

[0025] Figure 14 This diagram illustrates the action of pressing the button on the foldable stroller of this utility model.

[0026] Figure 15 This is a cross-sectional view of the foldable stroller push rod of this utility model at the folded position.

[0027] Figure 16 This is a diagram showing the movement of the foldable stroller push rod of this utility model in the folded position.

[0028] Figure 17 It is along Figure 15 A cross-sectional view of the first pull rope taken from clue 17-17.

[0029] Figure 18 This diagram shows the operation of the folding mechanism of the foldable stroller of this utility model in the folded state.

[0030] Figure 19 This is a cross-sectional view of the joint structure of the folding mechanism of the foldable stroller of this utility model in the folded state from another perspective.

[0031] Figure 20 This is a cross-sectional view of the joint structure of the folding mechanism of the foldable stroller of this utility model from another perspective when it is folded.

[0032] Figure 21 This is a three-dimensional view of the foldable stroller of this utility model after it has been folded up.

[0033] Explanation of reference numerals in the attached drawings: 10-Stroller; 20-Frame; 21-Rear wheel support; 211-Joint; 212-First locking keyway; 213-Stabilizing block; 214-Elastic element; 215-Limiting rod; 22-Front wheel support; 221-Front axle; 222-Second locking keyway; 223-Moving part; 224-Clamping part; 225-Limiting groove; 23-Bracket; 231-Rear axle; 232-Clamping slot; 233-Plug; 234-Plug Spring; 235-crossbar; 236-closed end; 237-first locking part; 24-push rod; 241-shaft; 242-second locking part; 243-press button; 30-folding mechanism; 31-first rope pulley; 32-control component; 33-first pull rope; 34-locking key; 35-linkage component; 351-first shaft; 352-second shaft; 36-reset elastic component; 37-second rope pulley; 371-second pull rope; 38-locking component. Detailed Implementation

[0034] Please refer to Figures 1 to 21 The figures shown are a perspective view, an exploded perspective view, and a cross-sectional view of the foldable stroller of this utility model. This utility model provides a foldable stroller 10, including a frame 20 and a folding mechanism 30; wherein:

[0035] The frame 20 includes a rear wheel bracket 21, a front wheel bracket 22, a bracket 23, and a push rod 24. One end of the rear wheel bracket 21 is provided with a joint 211, and a first locking keyway 212 is provided in the joint 211. The front wheel bracket 22 is pivotally mounted on the joint 211 with a front axle 221 as the center. The bracket 23 is pivotally mounted on the joint 211 with a rear axle 231 as the center. The bracket 23 is provided with a latch 232 along the radial outer periphery of the rear axle 231. The push rod 24 is pivotally mounted on the bracket 23 with rotation between the unfolded position and the folded position.

[0036] The folding mechanism 30 is connected to the frame 20 and can switch between an unfolded and a folded state. The folding mechanism 30 includes a first pulley 31, a control element 32, a first pull rope 33, a locking key 34, and a linkage 35. The first pulley 31 is pivotally mounted on the bracket 23, rotating with the push rod 24. The control element 32 is pivotally mounted on the bracket 23. One end of the first pull rope 33 is connected to the first pulley 31, and the other end is connected to the control element 32. The locking key 34 is radially movable along the rear axle 231 and is disposed in the first locking key groove 212. The linkage 35 is pivotally mounted about a first axis 351. The bracket 23 is pivotally connected to the front wheel bracket 22 and rotatably connected to the bracket 23 with a second shaft 352 as the center. The front shaft 221, rear shaft 231, first shaft 351 and second shaft 352 are parallel to each other. When the folding mechanism 30 is in the unfolded state, the locking key 34 is inserted into the slot 232, so that the bracket 23 cannot rotate relative to the rear wheel bracket 21. When the push rod 24 rotates to the reverse folding position, it can switch the folding mechanism 30 to the folded state. When the folding mechanism 30 is in the folded state, the control member 32 pushes the locking key 34 out of the slot 232, so that the bracket 23 and the front wheel bracket 22 can rotate synchronously relative to the rear wheel bracket 21.

[0037] The front wheel bracket 22 is provided with a second locking keyway 222 in a direction parallel to the front axle 221. The second locking keyway 222 includes a movable part 223 and a locking part 224. The movable part 223 is arc-shaped with the front axle 221 as the center. The locking part 224 connects to the movable part 223 and extends radially along the front axle 221. When the folding mechanism 30 is in the unfolded state, the locking key 34 is disposed in the locking part 224, so that the front wheel bracket 22 cannot rotate relative to the rear wheel bracket 21. When the folding mechanism 30 is in the folded state, the locking key 34 moves to the movable part 223, and the locking key 34 moves within the movable part 223 when the front wheel bracket 22 rotates.

[0038] The rear wheel bracket 21 is provided with two stabilizing blocks 213 and two elastic elements 214. The two stabilizing blocks 213 are respectively disposed on opposite sides of the rear wheel bracket 21 along the axial direction of the rear axle 231, and are movable radially along the rear axle 231. The two stabilizing blocks 213 are respectively connected to opposite ends of the locking key 34. The two elastic elements 214 are connected to the two stabilizing blocks 213. One end of the elastic element 214 abuts against the rear wheel bracket 21 and the other end abuts against the stabilizing block 213. The elastic element 214 can push the stabilizing block 213 to move the locking key 34 closer to the rear axle 231.

[0039] The rear wheel bracket 21 is provided with a limiting rod 215 in a direction parallel to the front axle 221, and the front wheel bracket 22 is provided with a limiting groove 225 in a direction parallel to the front axle 221. The limiting groove 225 is arc-shaped with the front axle 221 as the center, and the limiting rod 215 is movably inserted into the limiting groove 225.

[0040] The bracket 23 is provided with a plug 233, a plug spring 234, and a crossbar 235. The plug 233 is radially movable within the bracket 23 along the rear axle 231. The plug spring 234 is disposed within the bracket 23, with one end abutting against the bracket 23 and the other end abutting against the plug 233. The plug spring 234 can push the plug 233 to move away from the rear axle 231, while the plug 233 moves in the opposite direction. A closed end 236 is provided at one end of the plug spring 234. The closed end 236 is located in the bayonet 232. One end of the crossbar 235 is slidably connected to the control member 32 and the other end is connected to the plug 233. When the folding mechanism 30 is in the unfolded state, the closed end 236 abuts against the locking key 34. When the folding mechanism 30 is in the folded state, the closed end 236 moves away from the rear axle 231 and blocks the bayonet 232.

[0041] The folding mechanism 30 includes a reset elastic element 36, which is sleeved on the first pull rope 33. One end of the reset elastic element 36 abuts against the bracket 23 and the other end abuts against the control element 32.

[0042] The bracket 23 is provided with a first locking part 237. The push rod 24 is provided with a shaft 241, a second locking part 242, and a button 243. The shaft 241 passes through the first locking part 237 and is pivotally mounted on the bracket 23. The first locking part 237 is adjacent to the second locking part 242 and surrounds the shaft 241. The folding mechanism 30 includes a second rope pulley 37 and a locking member 38. The second rope pulley 37 is rotatably sleeved on the shaft 241 and disposed within the second locking part 242. The second rope pulley 37 is connected to a second pull rope 371. 371 is opposite to one end of the second rope pulley 37 connected to the button 243. The locking member 38 is axially movable on the shaft 241. When the button 243 is released, the locking member 38 simultaneously engages the first locking part 237 and the second locking part 242, keeping the push rod 24 in the unfolded position. Pressing the button 243 can drive the second rope pulley 37 to rotate through the second pull rope 371, and the second rope pulley 37 can push the locking member 38 to move towards the bracket 23 and disengage from the second locking part 242, so that the push rod 24 can rotate relative to the bracket 23.

[0043] The stroller 10 can be folded and its size greatly reduced through the above-described structure. Pressing the button 243 and then folding the push rod 24 forward switches the folding mechanism 30 to the folding state. After the folding mechanism 30 is unlocked, the rear wheel bracket 21, the front wheel bracket 22, and the bracket 23, together with the linkage 35, can form a four-bar linkage structure, so that the front wheel bracket 22 and the bracket 23 can be folded synchronously towards the rear wheel bracket 21. After the stroller 10 is folded, the rear wheel bracket 21, the front wheel bracket 22, the bracket 23, and the push rod 24 overlap adjacent to each other, making the stroller 10 not only greatly reduced in size and easy to store, but also designed to be folded with only one hand by operating the push rod 24. This makes it convenient for users to take out items or pick up the baby and then fold the stroller 10 with the other hand.

[0044] Based on the above, the present invention can be summarized as having the following advantages:

[0045] This utility model relates to a foldable stroller, wherein the stroller includes a frame and a folding mechanism. The frame includes a rear wheel bracket, a front wheel bracket, a support bracket, and a push rod. One end of the rear wheel bracket has a joint with a first locking key groove. The front wheel bracket is pivotally mounted to the joint about a front axle. The support bracket is pivotally mounted to the joint about a rear axle and has a latch along its radial outer periphery. The push rod is pivotally mounted to the support bracket between an unfolded position and a folded position. The folding mechanism is switchably connected to the frame between the unfolded and folded states. The folding mechanism includes a first pulley, a control component, a first pull cord, a locking key, and a linkage component. The wheel is pivotally mounted on the bracket, rotating with the push rod. The control component is pivotally mounted on the bracket. One end of the first pull rope is connected to the first pulley, and the other end is connected to the control component. The locking key is radially movable along the rear axle and is disposed in the first locking key groove. The linkage is pivotally connected to the front wheel bracket about a first axis and pivotally connected to the bracket about a second axis. When the folding mechanism is in the unfolded state, the locking key is inserted into the latch, preventing the bracket from rotating relative to the rear wheel bracket. When the push rod rotates to the reverse folding position, it can switch the folding mechanism to the folded state. When the folding mechanism is in the folded state, the control component pushes the locking key out of the latch, allowing the bracket and the front wheel bracket to rotate synchronously relative to the rear wheel bracket. The stroller can be folded and its volume greatly reduced through the above structure.

Claims

1. A collapsible stroller, characterized by, Comprising: A frame (20) comprising a rear wheel support (21), a front wheel support (22), a bracket (23) and a push rod (24), one end of the rear wheel support (21) is provided with a joint (211), a first lock slot (212) is arranged in the joint (211), the front wheel support (22) is pivotally arranged in the joint (211) with a front shaft (221) as the center, the bracket (23) is pivotally arranged in the joint (211) with a rear shaft (231) as the center, a bayonet (232) is arranged on the outer periphery of the bracket (23) along the radial direction of the rear shaft (231), and the push rod (24) is pivotally arranged in the bracket (23) between the unfolded position and the folded position; A folding mechanism (30) connected to the frame (20) between the unfolded state and the folded state, the folding mechanism (30) comprising a first rope wheel (31), a control member (32), a first pull rope (33), a lock (34) and a linkage (35), the first rope wheel (31) is pivotally arranged in the bracket (23) with the push rod (24), the control member (32) is pivotally arranged in the bracket (23), one end of the first pull rope (33) is connected to the first rope wheel (31) and the other end is connected to the control member (32), the lock (34) is arranged in the first lock slot (212) and can move radially along the rear shaft (231), the linkage (35) is pivotally connected to the front wheel support (22) with a first shaft (351) as the center and is pivotally connected to the bracket (23) with a second shaft (352) as the center, the front shaft (221), the rear shaft (231), the first shaft (351) and the second shaft (352) are parallel to each other, when the folding mechanism (30) is in the unfolded state, the lock (34) is embedded in the bayonet (232), so that the bracket (23) cannot rotate relative to the rear wheel support (21), the push rod (24) is rotated to the folded position to switch the folding mechanism (30) to the folded state, when the folding mechanism (30) is in the folded state, the control member (32) pushes the lock (34) out of the bayonet (232), so that the bracket (23) and the front wheel support (22) can rotate relative to the rear wheel support (21).

2. A collapsible pram as claimed in claim 1, wherein: The front wheel support (22) is provided with a second locking groove (222) along a direction parallel to the front shaft (221), the second locking groove (222) comprises a movable part (223) and a clamping part (224), the movable part (223) is circular arc-shaped with the front shaft (221) as the center, the clamping part (224) is connected to the movable part (223) and extends radially along the front shaft (221), when the folding mechanism (30) is in the unfolded state, the lock key (34) is arranged in the clamping part (224), so that the front wheel support (22) cannot rotate relative to the rear wheel support (21), when the folding mechanism (30) is in the folded state, the lock key (34) moves to the movable part (223), and the lock key (34) moves in the movable part (223) when the front wheel support (22) rotates.

3. The collapsible stroller of claim 1, wherein: The rear wheel support (21) is provided with two stabilizing blocks (213) and two elastic members (214), the two stabilizing blocks (213) are respectively arranged on the two sides of the rear wheel support (21) along the rear shaft (231) in the axial direction, the two stabilizing blocks (213) are respectively connected to the opposite ends of the lock key (34), the two elastic members (214) are connected to the two stabilizing blocks (213), one end of the elastic member (214) abuts against the rear wheel support (21) and the other end abuts against the stabilizing block (213), the elastic member (214) can push the stabilizing block (213) to drive the lock key (34) to move close to the rear shaft (231).

4. The collapsible stroller of claim 1, wherein: The rear wheel support (21) is provided with a limiting rod (215) along a direction parallel to the front shaft (221), the front wheel support (22) is provided with a limiting groove (225) along a direction parallel to the front shaft (221), the limiting groove (225) is circular arc-shaped with the front shaft (221) as the center, and the limiting rod (215) is movably inserted into the limiting groove (225).

5. The collapsible stroller of claim 1, wherein: The bracket (23) is provided with a plug (233), a plug spring (234) and a crossbar (235), the plug (233) is movably arranged in the bracket (23) along the rear shaft (231), the plug spring (234) is arranged in the bracket (23), one end of the plug spring (234) abuts against the bracket (23) and the other end abuts against the plug (233), the plug spring (234) can push the plug (233) to move away from the rear shaft (231), the plug (233) is provided with a closed end (236) opposite to one end of the plug spring (234), the closed end (236) is arranged in the bayonet (232), one end of the crossbar (235) is slidably connected to the control member (32) and the other end is connected to the plug (233), when the folding mechanism (30) is in the unfolded state, the closed end (236) abuts against the lock (34), when the folding mechanism (30) is in the folded state, the closed end (236) moves away from the rear shaft (231) and blocks the bayonet (232).

6. The collapsible stroller of claim 1, wherein: The folding mechanism (30) comprises a reset elastic member (36), the reset elastic member (36) is sleeved on the first pull rope (33), one end of the reset elastic member (36) abuts against the bracket (23) and the other end abuts against the control member (32).

7. The collapsible stroller of claim 1, wherein: The bracket (23) is provided with a first clamping portion (237), the push rod (24) is provided with a shaft (241), a second clamping portion (242) and a press button (243), the shaft (241) passes through the first clamping portion (237) and is pivotally arranged in the bracket (23), the first clamping portion (237) is adjacent to the second clamping portion (242) and surrounds the shaft (241), the folding mechanism (30) comprises a second rope wheel (37) and a clamping member (38), the second rope wheel (37) is rotatably sleeved on the shaft (241) and arranged in the second clamping portion (242), the second rope wheel (37) is connected with a second pull rope (371), one end of the second pull rope (371) opposite to the second rope wheel (37) is connected to the press button (243), the clamping member (38) is movably sleeved on the shaft (241) along the shaft (241), when the press button (243) is released, the clamping member (38) simultaneously engages the first clamping portion (237) and the second clamping portion (242), so that the push rod (24) remains in the unfolded position, pressing the press button (243) can drive the second rope wheel (37) to rotate through the second pull rope (371), and the second rope wheel (37) can push the clamping member (38) to move towards the bracket (23) and disengage from the second clamping portion (242), so that the push rod (24) can rotate relative to the bracket (23).

Images