A stroller that folds conveniently

Abstract

The utility model discloses and baby carriage technical field, specifically related to a convenient folding children's push car, including front axle, lower push rod, seat frame and rear axle, and corresponding connection and form the frame joint, be provided with frame locking assembly in the frame joint, and frame locking assembly can simultaneously with front axle, lower push rod relative rear axle locking, and frame locking assembly in handle bar relative lower push rod folding to preset position, simultaneously, release front axle, lower push rod relative rear axle locking state, and seat frame is then in the seat frame linkage member release tension under its gravity effect automatic folding, make it have the characteristics such as folding car convenient, high -efficient, the user is convenient between folding and unfolding switches use, and folding linkage mechanism is set up in the frame joint, make it whole car appearance simple, avoided the conventional design with the exposed link assembly of frame, also effectively reduced the production manufacturing cost, promoted the market competitiveness of the children's push car of the present application.

Description

Technical Field

[0001] This utility model relates to the field of children's stroller technology, specifically to a children's stroller that is easy to fold. Background Technology

[0002] Currently, most strollers on the market have a folding function, and the seat frame can be folded together with it. During folding, the seat frame is typically unlocked and folded first, followed by the frame, requiring two unlocking operations. Similarly, to unfold the stroller, the frame must be unfolded first, followed by the seat frame. Therefore, this design presents an inconvenience for users when folding and unfolding the stroller.

[0003] In addition, in order to link the folding and unfolding of the frame and seat, exposed linkage assemblies are usually installed between the front and rear foot rods, push rods and seat of the frame. With this structure, the exposed linkage assembly not only affects the simplicity of the overall vehicle structure, but also increases the weight of the vehicle, which in turn affects people's ability to carry it when going out, and affects the production and manufacturing costs.

[0004] Furthermore, the existing frame's push rod, front foot bar, seat frame, and backrest generally use a step-by-step unlocking method. This design affects the efficiency of folding the bike and also causes inconvenience to the user.

[0005] In view of the above-mentioned technical problems, this utility model is proposed in this study. Utility Model Content

[0006] The technical problem this utility model aims to solve is to provide a conveniently foldable children's stroller, including a front leg, a lower push rod, a seat frame, and a rear leg, which are connected to form a frame joint. A frame locking component is provided within the frame joint. This component simultaneously locks the front leg and lower push rod relative to the rear leg. When the handlebar is folded to a preset position relative to the lower push rod, the locking of the front leg and lower push rod relative to the rear leg is released. Simultaneously, the seat frame automatically folds under its own weight after the seat frame linkage releases tension. This design makes folding the stroller convenient and efficient, allowing users to easily switch between folded and unfolded use. Furthermore, the folding linkage mechanism is located within the frame joint, resulting in a clean and simple overall appearance. This avoids the use of exposed linkage components in conventional designs, effectively reducing manufacturing costs and enhancing the market competitiveness of this children's stroller.

[0007] To solve the above-mentioned technical problems, this utility model provides a conveniently foldable children's stroller, which can be switched between a folded state and an unfolded state, including:

[0008] A frame, the frame including a front leg, a rear leg, a seat frame, and a pushrod assembly;

[0009] The push rod assembly includes a handle rod and a lower push rod that can be folded or extended relative to each other;

[0010] The upper end of the front leg, the rear end of the seat frame, and the lower end of the push rod are rotatably connected relative to the upper end of the rear leg to form a frame joint;

[0011] A push rod locking mechanism is provided between the lower push rod and the handle bar to lock the handle bar relative to the lower push rod;

[0012] The frame joints are equipped with frame locking components for locking the front leg and the lower push rod relative to the rear leg.

[0013] The frame joints are also equipped with a folding linkage mechanism for unfolding or folding the front leg and the lower push rod relative to the rear leg.

[0014] The seat frame linkage is a flexible component with its upper end connected to the handle bar and its lower end connected to the front side of the seat frame. The seat frame linkage is configured to release the tension on the seat frame when the push rod assembly is folded or retracted, so that the seat frame can be folded. When the push rod assembly is unfolded, the seat frame linkage will pull the seat frame to unfold accordingly.

[0015] The handlebar is provided with a frame unlocking mechanism for releasing the locking state of the push rod locking mechanism, and the frame locking component is configured such that after the push rod locking mechanism is released, the handlebar is folded to a preset position relative to the lower push rod, and then the frame locking component is unlocked in conjunction with the push rod.

[0016] As described above, a foldable stroller also includes a backrest, which is rotatably connected to the seat frame via a frame joint. A backrest locking mechanism is provided between the backrest and the seat frame to lock the backrest relative to the seat frame. A push rod linkage assembly is provided between the handle and the lower push rod. The backrest locking mechanism and the frame locking assembly are both linked to the push rod linkage assembly and can be unlocked simultaneously.

[0017] As described above, a foldable stroller is provided in which the handlebar and the lower push rod are foldably connected, and a push rod linkage component is provided between the handlebar and the lower push rod. The push rod linkage component is linked with the frame locking component. When the push rod locking mechanism is unlocked and the handlebar is folded relative to the lower push rod to a preset position, the push rod linkage component is linked with the frame locking component to unlock.

[0018] As described above, a child stroller that is easy to fold up includes a frame joint comprising a front leg rod connecting block connected to the upper end of the front leg rod, a rear leg rod connecting block connected to the upper end of the rear leg rod, a lower push rod connecting block connected to the lower end of the lower push rod, and a seat frame connecting block connected to the rear end of the seat frame.

[0019] The front leg connecting block, the lower push rod connecting block, and the seat frame connecting block are rotatably connected to the rear leg connecting block via pivot a. The folding linkage mechanism is located between the rear leg connecting block, the lower push rod connecting block, and the front leg connecting block to fold or unfold the lower push rod connecting block and the front leg connecting block relative to the rear leg connecting block.

[0020] As described above, a child stroller that is easy to fold up includes a folding linkage mechanism comprising a first linkage plate, a second linkage plate, and a third linkage plate.

[0021] The first linkage plate has a first connecting part, a second connecting part, and a third connecting part. The third connecting part is located between the first connecting part and the second connecting part. The first connecting part is rotatably connected to the rear foot rod connecting block. The second connecting part is rotatably connected to one end of the second linkage plate. The other end of the second linkage plate is rotatably connected to the lower push rod connecting block. One end of the third linkage plate is rotatably connected to the third connecting part. The other end of the third linkage plate is rotatably connected to the front foot rod connecting block.

[0022] As described above, the folding linkage mechanism of the convenient folding stroller further includes a fourth linkage plate. One end of the third linkage plate and one end of the fourth linkage plate are rotatably connected to the third connecting part, and the other end of the fourth linkage plate is rotatably connected to the seat frame connecting block.

[0023] As described above, a foldable stroller includes a folding linkage mechanism comprising a linkage guide groove disposed off-pivot a on the rear leg connecting block, and the third connecting part being directly or indirectly slidably connected to the linkage guide groove.

[0024] As described above, a child stroller that is easy to fold includes a folding linkage mechanism that further includes a seat frame elastic member disposed between the seat frame connecting block and the rear leg connecting block for providing folding torque to the seat frame connecting block. The pivot a passes through the seat frame elastic member, and one end of the seat frame elastic member abuts against the rear leg connecting block, while the other end abuts against the seat frame connecting block.

[0025] As described above, a foldable stroller includes a folding linkage mechanism that further comprises a front leg elastic member disposed between the front leg connecting block and the rear leg connecting block for providing folding elastic force to the front leg connecting block. The front leg elastic member is eccentrically disposed on the rear leg connecting block. One end of the front leg elastic member abuts against the rear leg connecting block, and the other end of the front leg elastic member is connected to a push slider that can slide around a pivot a on the rear leg connecting block. The push slider abuts against the front leg connecting block.

[0026] As described above, a convenient folding stroller includes a frame locking assembly comprising a frame locking movable member movably mounted on a lower push rod connecting block. The frame locking movable member is provided with a latch. The rear leg connecting block, front leg connecting block, and seat frame connecting block are each provided with a slot for the latch to be simultaneously engaged. The lower push rod connecting block is provided with a frame locking elastic member that elastically presses against the frame locking movable member to allow the latch to be simultaneously engaged in all slots. The rear leg connecting block, front leg connecting block, and seat frame connecting block are each provided with an arc-shaped clearance groove communicating with the slot and surrounding the pivot a. The push rod linkage assembly is linked to the frame locking movable member.

[0027] As described above, a child stroller that is easy to fold is provided, wherein the push rod locking mechanism includes a handle joint block and a push rod joint block that are rotatably connected, the push rod joint block is provided with a push rod locking hole, the handle joint block is provided with a push rod locking member that can be retracted and inserted into the push rod locking hole, and the push rod locking member is linked to the frame unlocking mechanism.

[0028] The push rod linkage assembly includes a push rod sliding block and a cam. The push rod sliding block is slidably mounted on the push rod joint block, and the cam is movably mounted on the handlebar joint block. When the handlebar joint block rotates relative to the push rod joint block, the cam pushes the push rod sliding block to slide relative to the push rod joint block, thereby unlocking the frame locking assembly.

[0029] As described above, a foldable stroller includes a frame joint comprising a backrest connecting block connected to the lower end of the backrest, a seat frame connecting block connected to the rear end of the seat frame, a front leg connecting block connected to the upper end of the front leg, a rear leg connecting block connected to the upper end of the rear leg, and a lower push rod connecting block connected to the lower end of the lower push rod; the backrest connecting block, seat frame connecting block, front leg connecting block, and lower push rod connecting block are rotatably connected to the rear leg connecting block via pivot a.

[0030] The backrest locking mechanism includes a chuck, a chuck elastic element, a chuck driving element, and a backrest locking element;

[0031] The chuck is mounted on the backrest connecting block and can move axially relative to the backrest connecting block along pivot a. The backrest locking member is located in the backrest connecting block. The edge of the chuck has a slot for the backrest locking member to be inserted. The chuck elastic member is located between the chuck and the side of the backrest connecting block away from the seat frame connecting block. A push block is provided on the middle part of the chuck away from pivot a, and a second inclined surface is provided on the push block.

[0032] The chuck drive is mounted on the frame connecting block and penetrated by pivot a. The chuck drive can rotate around pivot a and slide radially relative to the frame connecting block at the same time as the frame connecting block. The chuck drive is provided with a first inclined surface that abuts against the second inclined surface.

[0033] The chuck drive component is linked to the frame locking assembly. When the frame locking assembly is unlocked, the chuck drive component slides radially relative to the seat frame connecting block to push the chuck to move axially, thereby causing the backrest locking component to disengage from the slot and release the backrest from its locking state.

[0034] As described above, a foldable stroller also includes a handlebar, which is rotatably connected to a lower push rod. A handlebar locking and positioning component is provided between the handlebar and the lower push rod. The handlebar locking and positioning component is configured to lock when the handlebar is unfolded relative to the lower push rod and to position when the handlebar is folded relative to the lower push rod so that the handlebar remains facing upward for the user to lift.

[0035] The handrail locking and positioning component is linked with the push rod linkage component, and the push rod linkage component is configured to first release the handrail unfolding and locking state, and then link the frame locking component to unlock.

[0036] Compared with the prior art, the present invention provides a convenient folding stroller with the following advantages:

[0037] 1. This application provides a frame locking component within the frame joint. The frame locking component can simultaneously lock the front leg and the lower push rod relative to the rear leg. When the handlebar is folded to a preset position relative to the lower push rod, the frame locking component simultaneously releases the locking state of the front leg and the lower push rod relative to the rear leg. At the same time, the seat frame automatically folds down under its own weight after the seat frame linkage releases the tension, making it convenient and efficient to fold up. Furthermore, when the entire vehicle is unfolded, the seat frame linkage can pull the seat frame to unfold, thus facilitating the user to switch between folding and unfolding modes.

[0038] 2. The folding linkage mechanism of this application is set inside the frame joint, which makes the overall appearance of the vehicle simple and avoids the use of exposed linkage components on the frame in conventional designs. At the same time, it also effectively reduces the production and manufacturing costs and enhances the market competitiveness of this utility model of children's stroller.

[0039] 3. In this application, the backrest locking mechanism is linked with the frame locking assembly, so that the backrest, front foot bar, lower push bar, and seat frame are unlocked simultaneously, which further optimizes the efficiency of unlocking and folding the whole vehicle, makes it more convenient for users, and enhances the user's experience.

[0040] 4. In the frame joint, seat frame elastic components and front leg elastic components are respectively provided to provide folding power to the seat frame connecting block and the front leg connecting block. This makes the folding of the whole vehicle of this utility model more efficient and can effectively avoid the phenomenon of folding jamming caused by friction between various parts, thus making it smooth in folding.

[0041] 5. In this utility model, the handrail and the lower push rod are rotatably connected, and a handrail locking and positioning component is provided between them. When unfolded, the handrail locking and positioning component locks the handrail relative to the lower push rod. When the handrail locking and positioning component is unlocked in conjunction to fold, the handrail locking and positioning component locks the handrail relative to the lower push rod again when the handrail is folded to a preset position relative to the lower push rod, so that the handrail faces upward when the whole vehicle is folded and standing, thus facilitating lifting and use.

[0042] 6. To prevent the handrail from affecting the forward folding of the handlebar relative to the lower push rod, this utility model sets the handrail locking and positioning component and the push rod linkage component in a linked manner. The push rod linkage component is configured to first release the handrail unfolding lock state and then link the frame locking component to unlock, thus ensuring smooth linkage folding of the whole vehicle. Attached Figure Description

[0043] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0044] Figure 1 This is a schematic diagram of the structure of this utility model.

[0045] Figure 2 This is another structural schematic diagram of the present invention.

[0046] Figure 3 This is a schematic diagram of the folding mechanism of the children's stroller in this utility model.

[0047] Figure 4 This is another structural diagram of the folding mechanism of the children's stroller in this utility model.

[0048] Figure 5 This is a folding diagram of the children's stroller in this utility model.

[0049] Figure 6 This is a structural schematic diagram of the frame joint in this utility model.

[0050] Figure 7 This is a structural schematic diagram of the frame locking assembly in this utility model.

[0051] Figure 8 This is a schematic diagram of the locking pin structure in this utility model.

[0052] Figure 9 This is a schematic diagram of the folding linkage mechanism in this utility model.

[0053] Figure 10 This is an exploded structural diagram of the frame joint in this utility model.

[0054] Figure 11 This is another exploded structural diagram of the frame joint in this utility model.

[0055] Figure 12 This is a schematic diagram of the structure of the first linkage piece in this utility model.

[0056] Figure 13 This is a schematic diagram of the structure of the elastic element of the front foot rod in this utility model.

[0057] Figure 14 This is a schematic diagram of the backrest locking mechanism in this utility model.

[0058] Figure 15 This is a schematic diagram of the push rod locking mechanism in this utility model.

[0059] Figure 16 This is a structural schematic diagram of the handrail locking component in this utility model.

[0060] Figure 17 This is another structural schematic diagram of the push rod locking mechanism in this utility model.

[0061] Figure 18 This is another structural schematic diagram of the handrail locking component in this utility model.

[0062] Figure 19 This is a schematic diagram of the frame unlocking mechanism in this utility model.

[0063] In the diagram: 1. Frame; 100. Seat frame linkage; 10. Front footrest; 11. Rear footrest; 12. Seat frame; 13. Push rod assembly; 130. Handlebar; 1300. Handlebar joint; 131. Lower push rod; 1301. Push rod joint; 132. Push rod linkage assembly; 133. Push rod sliding block; 134. Cam; 14. Backrest; 15. Armrest;

[0064] 2. Frame joint; 200. Pivot a; 20. Front leg joint connecting block; 21. Rear leg joint connecting block; 210. First connecting plate; 211. Second connecting plate; 22. Lower push rod connecting block; 23. Seat frame connecting block; 24. Backrest connecting block;

[0065] 3. Push rod locking mechanism; 30. Push rod locking hole; 31. Push rod locking component;

[0066] 4. Frame locking assembly; 40. Frame locking moving part; 41. Pin; 42. Slot; 43. Frame locking elastic part; 44. Arc-shaped clearance groove;

[0067] 5. Folding linkage mechanism; 51. First linkage plate; 511. First connecting part; 512. Second connecting part; 513. Third connecting part; 52. Second linkage plate; 53. Third linkage plate; 54. Fourth linkage plate; 55. Linkage guide groove; 56. Base frame elastic element; 57. Front foot rod elastic element; 58. Pushing slider;

[0068] 6. Frame unlocking mechanism; 60. Handlebar unlocking slide bar; 61. Handlebar unlocking button; 62. Handlebar unlocking drive groove; 63. Handlebar connecting block; 64. Movable hole;

[0069] 7. Backrest locking mechanism; 70. Chuck; 700. Slot; 701. Backrest locking component; 71. Chuck elastic component; 72. Chuck driving component; 73. Arc-shaped connecting groove; 74. First inclined surface; 75. Push block; 76. Second inclined surface; 77. Retaining elastic component;

[0070] 9. Handrail locking and positioning assembly; 90. First locking block; 91. Second locking block; 92. Handrail locking drive bar; 93. First socket; 94. Second socket; 95. First drive ramp; 96. Second drive ramp. Detailed Implementation

[0071] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0072] like Figure 1-19 As shown, a foldable stroller is disclosed, which can be switched between a folded state and an unfolded state. It includes a frame 1 and a seat linkage 100. The frame 1 includes a front leg 10, a rear leg 11, a seat 12, and a push rod assembly 13. The push rod assembly 13 includes a handle bar 130 and a lower push rod 131 that can be folded or extended. The upper end of the front leg 10, the rear end of the seat 12, and the lower end of the lower push rod 131 are rotatably connected relative to the upper end of the rear leg 11 to form a frame joint 2.

[0073] A push rod locking mechanism 3 is provided between the lower push rod 131 and the handlebar 130 for unfolding and locking the handlebar 130 relative to the lower push rod 131. A frame locking assembly 4 is provided on the frame joint 2 for unfolding and locking the front foot bar 10 and the lower push rod 131 relative to the rear foot bar 11. A folding linkage mechanism 5 is also provided on the frame joint 2 for unfolding or folding the front foot bar 10 and the lower push rod 131 relative to the rear foot bar 11. A seat linkage component 100 is also provided.

[0074] The seat frame linkage 100 is a flexible component with its upper end connected to the handlebar 130 and its lower end connected to the front side of the seat frame 12. The seat frame linkage 100 is configured to release the pulling force on the seat frame 12 when the push rod assembly 13 is folded or retracted, so that the seat frame 12 can be folded. When the push rod assembly 13 is unfolded, the seat frame linkage 100 pulls the seat frame 12 to unfold accordingly. The handlebar 130 is provided with a frame unlocking mechanism 6 for releasing the locking state of the push rod locking mechanism 3. The frame locking assembly 4 is configured to fold the handlebar 130 relative to the lower push rod 131 to a preset position after the push rod locking mechanism 3 is unlocked, and then unlock the frame locking assembly 4.

[0075] In this application, a frame locking assembly 4 is provided in the frame joint 2. The frame locking assembly 4 can simultaneously lock the front leg bar 10 and the lower push rod 131 relative to the rear leg bar 11. When the handlebar 130 is folded to a preset position relative to the lower push rod 131, the frame locking assembly 4 simultaneously releases the locking state of the front leg bar 10 and the lower push rod 131 relative to the rear leg bar 11. At the same time, the seat frame 12 automatically folds under its own gravity after the seat frame linkage 100 releases the tension, making it convenient and efficient to fold the vehicle. Furthermore, when the entire vehicle is unfolded, the seat frame linkage 100 can pull the seat frame 12 to unfold, thus facilitating the user to switch between folding and unfolding.

[0076] The folding linkage mechanism 5 of this application is set inside the frame joint 2, which makes the overall appearance of the vehicle simple and avoids the use of exposed linkage components on the frame in conventional designs. At the same time, it also effectively reduces the production and manufacturing costs and enhances the market competitiveness of this utility model of children's stroller.

[0077] like Figures 1 to 6 , Figure 10 , Figure 11 as well as Figure 14 As shown, in a preferred embodiment, the vehicle also includes a backrest 14, which is rotatably connected to the seat frame 12 via a frame joint 2. A backrest locking mechanism 7 is provided between the backrest 14 and the seat frame 12 to lock the backrest 14 relative to the seat frame 12. A push rod linkage assembly 132 is provided between the handlebar 130 and the lower push rod 131. The backrest locking mechanism 7 and the frame locking assembly 4 are both linked with the push rod linkage assembly 132 and can be unlocked simultaneously. To further improve the folding efficiency, in this embodiment, the backrest locking mechanism 7 and the frame locking assembly 4 are linked, so that the backrest 1, the front leg bar 10, the lower push rod 131, and the seat frame 12 are unlocked simultaneously, further optimizing the efficiency of unlocking and folding the entire vehicle, facilitating the user, and improving the user's experience.

[0078] like Figures 6 to 14 As shown, as a further embodiment, the frame joint 2 includes a front leg joint connecting block 20 connected to the upper end of the front leg joint 10, a rear leg joint connecting block 21 connected to the upper end of the rear leg joint 11, a lower push rod connecting block 22 connected to the lower end of the lower push rod 131, and a seat frame connecting block 23 connected to the rear end of the seat frame 12. The front leg joint connecting block 20, the lower push rod connecting block 22, and the seat frame connecting block 23 are rotatably connected to the rear leg joint connecting block 21 via a pivot a200. The folding linkage mechanism 5 is provided between the rear leg joint connecting block 21, the lower push rod connecting block 22, and the front leg joint connecting block 20 to fold or unfold the lower push rod connecting block 22 and the front leg joint connecting block 20 relative to the rear leg joint connecting block 21.

[0079] The rear leg joint block 21 has a first connecting plate 210 and a second connecting plate 211. The front leg connecting block 20 is located between the first connecting plate 210 and the second connecting plate 211. The lower push rod connecting block 22 is located on the outer side of the first connecting plate 210. The backrest connecting block 24 is connected to the rear end side of the seat frame 12. By placing the front leg connecting block 20 between the first connecting plate 210 and the second connecting plate 211, the connection between the front leg 10 and the rear leg 11 can be made more stable, and the system can be more stable during use, preventing loosening.

[0080] In this application, the folding linkage mechanism 5 is located in the frame joint 2 and is used to fold or unfold the lower push rod connecting block 22 and the front leg connecting block 20 relative to the rear leg connecting block 21. In conjunction with the seat frame linkage component 100 to link the seat frame connecting block 23, the front leg connecting block 20, the lower push rod connecting block 22 and the seat frame connecting block 23 can be folded or unfolded relative to the rear leg connecting block 21 at the same time, which is convenient for the user to fold.

[0081] like Figures 15 to 19 As shown, in this embodiment, the push rod locking mechanism 3 includes a handle joint block 1300 and a push rod joint block 1301 that are rotatably connected. The push rod joint block 1301 is provided with a push rod locking hole 30. The handle joint block 1301 is provided with a push rod locking member 31 that can be telescopically inserted into the push rod locking hole 30. The push rod locking member 31 is linked with the frame unlocking mechanism 6. When the frame unlocking mechanism 6 is released from the linkage with the push rod locking mechanism 3, the push rod locking member 31 separates from the push rod locking hole 30. At this time, the handlebar joint block 1300 can rotate and fold relative to the push rod joint block 1301, and then the handlebar 130 can be pushed down to rotate and fold. It should be noted that a spring is provided between the push rod locking member 31 and the handlebar joint block 1300 to push the push rod locking member 31. The spring is not shown in this application. When the push rod assembly 13 is extended, it keeps the push rod locking member 31 locked in the push rod locking hole 30, thereby keeping the push rod assembly 13 in the extended state.

[0082] The push rod linkage assembly 132 includes a push rod sliding block 133 and a cam 134. The push rod sliding block 133 is slidably mounted on the push rod joint block 1301. The cam 134 is movably mounted on the handlebar joint block 1300. When the handlebar joint block 1300 rotates relative to the push rod joint block 1301, the cam 134 pushes the push rod sliding block 133 to slide relative to the push rod joint block 1301, thereby unlocking the frame locking assembly 4. In this embodiment, the push rod sliding block 133 and the frame locking assembly 4 can be connected by a steel cable. When the handlebar joint block 1300 rotates relative to the push rod joint block 1301, the cam 134 pushes the push rod sliding block 133 to slide relative to the push rod joint block 1301, and the push rod sliding block 133 will pull the frame locking assembly 4 through the steel cable to unlock.

[0083] like Figure 19 As shown, the frame unlocking mechanism 6 includes a handlebar unlocking slide bar 60 slidably disposed on the upper end of the handlebar 130 and directly or indirectly connected to the push rod locking member 31, and a handlebar unlocking button 61 elastically disposed on the upper end of the handlebar 130. The handlebar unlocking button 61 is provided with a handlebar unlocking drive groove 62 for driving the handlebar unlocking slide bar 60 to slide relative to the handlebar 130. It also includes a handlebar connecting block 63 disposed in the upper end of the handlebar 130. The handlebar unlocking button 61 and the handlebar connecting block 63 are elastically slidably engaged, and the handlebar connecting block 63 is provided with a movable hole 64 for the handlebar unlocking slide bar 60 to move left and right. When unlocking, the user presses the handle unlock button 61 and slides it relative to the handle connecting block 63. The handle unlock drive groove 62 then drives the handle unlock slide rod 60 to slide laterally in the movable hole 64. The handle unlock slide rod 60 drives the push rod locking member 31 to move accordingly through the unlock pull rope so that the locking end of the push rod locking member 31 exits the push rod locking hole 30. At this time, the handle 130 can be rotated and folded relative to the lower push rod 131.

[0084] like Figure 7-13 As shown, as a further embodiment, the folding linkage mechanism 5 includes a first linkage plate 51, a second linkage plate 52, and a third linkage plate 53. The first linkage plate 51 has a first connecting portion 511, a second connecting portion 512, and a third connecting portion 513. The third connecting portion 513 is located between the first connecting portion 511 and the second connecting portion 512. The first connecting portion 511 is rotatably connected to the rear leg rod connecting block 21. The second connecting portion 512 is rotatably connected to one end of the second linkage plate 52, and the other end of the second linkage plate 52 is rotatably connected to the lower push rod connecting block 22. One end of the third linkage plate 53 is rotatably connected to the third connecting portion 513, and the other end of the third linkage plate 53 is rotatably connected to the front leg rod connecting block 20.

[0085] As a further embodiment, the folding linkage mechanism 5 also includes a fourth linkage piece 54. One end of the third linkage piece 53 and one end of the fourth linkage piece 54 are rotatably connected to the third connecting part 513, and the other end of the fourth linkage piece 54 is rotatably connected to the seat frame connecting block 23.

[0086] In this embodiment, the first linkage plate 51, the second linkage plate 52, the third linkage plate 53, and the fourth linkage plate 54 are all steel plates, which achieves both thinness and excellent support strength, making the entire structure more compact. The first linkage plate 51, the second linkage plate 52, the third linkage plate 53, and the fourth linkage plate 54 are all connected to their corresponding components via shaft connections.

[0087] In this mechanism, the first connecting part 511 of the first linkage plate 51 is rotatably connected to the second connecting plate 211 of the rear foot rod connecting block 21, the lower push rod connecting block 22 is rotatably connected to the pivot a200, the lower push rod connecting block 22 is rotatably connected to the second linkage plate 52, and the other end of the second linkage plate 52 is rotatably connected to the second connecting part 512 of the first linkage plate 51. Therefore, the first linkage plate 51, the second linkage plate 52, the lower push rod connecting block 22, and the second connecting plate 211 form a four-bar linkage mechanism. The connecting plate 211 is relatively fixed, and the lower push rod connecting block 22 is the active component. When the stroller is folded or unfolded, the lower push rod connecting block 22 drives the second linkage plate 52 to move. The movement of the second linkage plate 52 drives the first linkage plate 51 and its first connecting part 511 to rotate. The first linkage plate 51 can then drive the third linkage plate 53 and the fourth linkage plate 54 through the third linkage part 513 to pull the front leg connecting block 20 and the seat frame connecting block 23 to the rear leg connecting block 21 for synchronous folding or unfolding, thereby improving folding efficiency and making it easier for users to use. In addition, in this embodiment, the folding linkage mechanism 5 is also connected to the seat frame connecting block 23 through the fourth linkage plate 54. This can prevent the seat frame 12 from failing to fold automatically due to friction during long-term use, which would otherwise be caused by gravity alone.

[0088] As a further embodiment, in order to make folding and unfolding smoother, the folding linkage mechanism 5 includes a linkage guide groove 55 disposed on the rear foot rod connecting block 21 off-axis a200. The third connecting part 513 is directly or indirectly slidably connected to the linkage guide groove 55. After setting the linkage guide groove 55, the linkage guide groove 55 can guide and limit the three connecting parts 513, thereby making folding and unfolding smoother.

[0089] As a further embodiment, the folding linkage mechanism 5 also includes a seat frame elastic member 56 disposed between the seat frame connecting block 23 and the rear leg connecting block 21 for providing folding torque to the seat frame connecting block 23. The pivot a200 passes through the seat frame elastic member 56. One end of the seat frame elastic member 56 abuts against the rear leg connecting block 21, and the other end abuts against the seat frame connecting block 23.

[0090] In this embodiment, by setting the seat frame elastic element 56, after the frame locking assembly 4 releases the restriction on the frame joint 2, the seat frame elastic element 56 can rotate and fold the seat frame connecting block 23 towards the rear leg connecting block 21. The seat frame connecting block 23 then simultaneously folds the front leg connecting block 20 and the lower push rod connecting block 22 towards the rear leg connecting block 21 through the folding linkage mechanism 5, thereby driving the front leg 10 and the lower push rod connecting block 22 to fold towards the rear leg 11. By setting the seat frame elastic element 56 to cooperate with the first linkage plate 51, the second linkage plate 52, the third linkage plate 53, and the fourth linkage plate 54, folding can be made smoother and faster, thus facilitating user storage. In this embodiment, the seat frame elastic element 56 is a torsion spring.

[0091] like Figure 11 As shown, as a further embodiment, the folding linkage mechanism 5 further includes a front leg elastic member 57 disposed between the front leg connecting block 20 and the rear leg connecting block 21 for providing folding elastic force to the front leg connecting block 20. The front leg elastic member 57 is eccentrically disposed on the rear leg connecting block 21. One end of the front leg elastic member 57 abuts against the rear leg connecting block 21, and the other end of the front leg elastic member 57 is connected to a push slider 58 that can slide around the pivot a200 on the rear leg connecting block 21. The push slider 58 abuts against the front leg connecting block 20. In this embodiment, by setting the front leg elastic element 57, the front leg elastic element 57 can drive the front leg connecting block 20 to fold towards the rear leg connecting block 21. At the same time, with the coordinated cooperation of the front leg elastic element 57, the first linkage plate 51, the second linkage plate 52, the third linkage plate 53, the fourth linkage plate 54, and the seat frame elastic element 56, the phenomenon of folding and jamming caused by friction between the various components can be effectively avoided, so that it has the characteristics of smooth folding. It should be noted that the front leg elastic element 57 in this application is a spring.

[0092] like Figures 7 to 19 As shown, as a further embodiment, the frame locking assembly 4 includes a frame locking movable member 40 movably mounted on the lower push rod connecting block 22. The frame locking movable member 40 is provided with a locking pin 41. The rear leg connecting block 21, the front leg connecting block 20, and the seat frame connecting block 23 are all provided with slots 42 for the locking pin 41 to be simultaneously engaged. The lower push rod connecting block 22 is provided with a frame locking elastic member 43 that elastically presses against the frame locking movable member 40 so that the locking pin 41 can be simultaneously engaged in all slots 42. The rear leg connecting block 21, the front leg connecting block 20, and the seat frame connecting block 23 are all provided with arc-shaped clearance grooves 44 that communicate with the slots 42 and are arranged around the pivot a200. The push rod linkage assembly 132 is linked with the frame locking movable member 40.

[0093] In this application, when the stroller is in the unfolded state, the locking pin 40 simultaneously engages the rear leg connecting block 21, the front leg connecting block 20, and the seat frame connecting block 23. When folding is required, the folding linkage mechanism 5 drives the frame locking movable member 40 to move, and the frame locking movable member 40 then drives the locking pin 40 to move to the arc-shaped clearance groove 42. At this time, the lower push rod connecting block 22, the front leg connecting block 20, and the seat frame connecting block 23 can rotate and fold relative to the rear leg connecting block 21. In addition, when the stroller is unfolded, the locking pin 40 remains engaged in the groove 42. Specifically, one end of the frame locking elastic member 43 is connected to the frame locking movable member 40, and the other end is connected to the lower push rod connecting block 22. When the stroller is in the unfolded state, the frame locking elastic member 43 pushes the frame locking movable member 40, and the stroller frame locking movable member 40 keeps the locking pin 40 engaged in the groove 42. To make the snap-fit ​​connection more secure, two snap-fit ​​pins 40 can be provided, and the two snap-fit ​​pins 40 are symmetrically arranged along the pivot a200, which can make the snap-fit ​​connection more secure.

[0094] It should be noted that the frame locking movable part 40 can be connected to the push rod sliding block 133 via a pull rope. When the frame unlocking mechanism 6 is unlocked, the handlebar 130 is rotated and folded relative to the lower push rod 131 to the set position. Then, the frame locking movable part 40 can be moved by the push rod sliding block 133. The frame locking movable part 40 then drives the locking pin 41 to release the restriction of the front leg connecting block 20 and the seat frame connecting block 23. The front leg 10 and the seat frame 12 can then be rotated and folded towards the rear leg 11.

[0095] like Figures 6 to 14 As shown, as a further embodiment, the frame joint 2 includes a backrest connecting block 24 connected to the lower end of the backrest 14, a seat frame connecting block 23 connected to the rear end of the seat frame 12, a front leg connecting block 20 connected to the upper end of the front leg 10, a rear leg connecting block 21 connected to the upper end of the rear leg 11, and a lower push rod connecting block 22 connected to the lower end of the lower push rod 131; the backrest connecting block 24, the seat frame connecting block 23, the front leg connecting block 20, and the lower push rod connecting block 22 are rotatably connected to the rear leg connecting block 21 via a pivot a200.

[0096] The backrest locking mechanism 7 includes a chuck 70, a chuck elastic element 71, a chuck drive element 72, and a backrest locking element 701. The chuck 70 is disposed on the backrest connecting block 24 and can move axially relative to the backrest connecting block 24 along the pivot a200. The backrest locking element 701 is disposed in the backrest connecting block 24. A slot 700 for the backrest locking element 701 to be inserted is formed on the edge of the chuck 70. The chuck elastic element 71 is placed between the chuck 70 and the side of the backrest connecting block 24 away from the seat frame connecting block 23. A push block 75 is provided on the middle part of the chuck 70 off the pivot a200. The push block 75 is provided with a second inclined surface 7. 5; The chuck drive member 72 is mounted on the seat frame connecting block 23 and penetrated by the pivot a200. The chuck drive member 72 can rotate around the pivot a200 and slide radially relative to the seat frame connecting block 23 simultaneously with the seat frame connecting block 23. The chuck drive member 72 is provided with a first inclined surface 74 that abuts against the second inclined surface 75. The chuck drive member 72 is linked to the frame locking assembly 4. When the frame locking assembly 4 is unlocked, the chuck drive member 72 slides radially relative to the seat frame connecting block 23 to push the chuck 70 to move axially, thereby causing the backrest locking member 701 to disengage from the slot 700 and release the locking state of the backrest 14. In addition, a retaining elastic member 77 is provided between the chuck drive member 72 and the seat frame connecting block 23. The retaining elastic member 77 is a spring. Under the action of the retaining elastic member 77, the chuck drive member 72 does not activate the chuck 70.

[0097] In this embodiment, when the frame locking assembly 4 is unlocked, the latch 40 of the frame locking assembly 4 simultaneously drives the chuck drive member 72 to move. The chuck drive member 72 then pushes against the second inclined surface 75 through the first inclined surface 74, allowing the chuck 70 to move axially and compress the chuck elastic member 71, causing the slot 700 in the chuck 70 to separate from the backrest locking member 701. At this time, the backrest connecting block 24 can rotate and fold relative to the seat frame connecting block 23 towards the rear footrest 11. This allows for the simultaneous unlocking of the front footrest 10, seat frame 12, backrest 14, and push rod assembly 13, achieving a one-click folding function for convenient storage. It should be noted that when the backrest 14 is in the unfolded state, the chuck elastic member 71 pushes against the chuck 70, at which time the backrest locking member 701 is located in the slot 700, and the chuck 70 can restrict the rotation of the backrest locking member 701, thereby restricting the rotation of the backrest connecting block 24. It should be noted that in this embodiment, only one of the locking pins 40 acts on the chuck drive component 72.

[0098] like Figures 1 to 6As shown in Figure 16, as a further embodiment of this application, the stroller of this application also includes a handle 15, which is rotatably connected to the lower push rod 131. A handle locking and positioning component 9 is provided between the handle 15 and the lower push rod 131. The handle locking and positioning component 9 is configured to lock when the handle 15 is unfolded relative to the lower push rod 131, and to position when the handle 15 is folded relative to the lower push rod 131 so that the handle 15 remains facing upward for the user to lift. In this application, the handrail 15 is rotatably connected to the lower push rod 131, and a handrail locking and positioning component 9 is provided between them. When unfolded, the handrail locking and positioning component 9 locks the handrail 15 relative to the lower push rod 131. When the handrail locking and positioning component 9 is unlocked and folded, the handrail locking and positioning component 9 locks the handrail 15 relative to the lower push rod 131 again when the handrail 15 is folded to a preset position, so that the handrail faces upward when the whole vehicle is folded and standing, thus facilitating lifting.

[0099] The handrail locking and positioning component 9 is linked with the push rod linkage component 132, and the push rod linkage component 132 is configured to first release the handrail 15 from the unfolded locking state, and then link the frame locking component 4 to unlock.

[0100] In this invention, to prevent the handrail 15 from affecting the forward folding of the handlebar 130 relative to the lower push rod 131, the handrail locking and positioning component 9 and the push rod linkage component 132 are linked together. The push rod linkage component 132 is configured to first release the handrail 15 from the unfolding locking state, and then link the frame locking component 4 to unlock, thus ensuring smooth linkage folding of the whole vehicle.

[0101] like Figures 15 to 19As shown in this application, the handrail 15 is rotatably connected to the lower push rod 131. The handrail locking and positioning assembly 9 includes a first locking block 90 and a second locking block 91 elastically disposed in the lower push rod 131, and a handrail locking drive bar 92 elastically slidably disposed in the lower push rod 131 for driving the displacement of the first locking block 90 and the second locking block 91. The handrail locking drive bar 92 is connected to the push rod sliding block 133 by a pull rope. The connection between the handrail and the lower push rod 15 is provided with a first insertion hole 93 for inserting the front end of the first locking block 90 and a second insertion hole 94 for inserting the front end of the second locking block 91. The handrail locking drive bar 92 is provided with a first driving inclined surface 95 for cooperating with the first locking block 90 and a second driving inclined surface 96, and the first driving inclined surface 95 and the second driving inclined surface 96 are arranged in opposite directions. When the handrail 15 is in the unfolded state, the handrail locking drive bar 92 is in the initial state, the first drive ramp 95 abuts against the first locking block 90, and the front end of the first locking block 90 is separated from the first insertion hole 93. The second drive ramp 96 does not act on the second locking block 91, and the front end of the second locking block 91 is inserted into the second insertion hole 94, so that the handrail 15 is in the unfolded and locked state. When the stroller is folded up, when the handle 130 is folded to the set position relative to the lower push rod 131, the cam 134 is driven to rotate, thereby driving the push rod sliding block 133 to move. The push rod sliding block 133 then drives the armrest locking drive bar 92 to move via the pull rope. The movement of the armrest locking drive bar 92 drives the second locking block 91 to separate from the second insertion hole 94 via the second drive ramp 96. At the same time, the first drive ramp 95 does not act on the first locking block 90. ​​After the armrest 15 is folded to the set position, the front end of the first locking block 90 is inserted into the first insertion hole 93, locking the armrest 15 in the folded state. Thus, after the stroller is folded up, the armrest 15 is locked in an upward position for the user to lift.

Claims

1. A conveniently foldable stroller, wherein the stroller can be switched between a folded state and an unfolded state, characterized in that... include: The frame (1) includes a front leg (10), a rear leg (11), a seat frame (12), and a push rod assembly (13). The push rod assembly (13) includes a handle rod (130) that can be folded or extended and a lower push rod (131). The upper end of the front leg (10), the rear end of the seat frame (12) and the lower end of the push rod (131) are rotatably connected relative to the upper end of the rear leg (11) to form a frame joint (2). A push rod locking mechanism (3) is provided between the lower push rod (131) and the handle rod (130) for locking the handle rod (130) relative to the lower push rod (131). The frame joint (2) is provided with a frame locking assembly (4) for locking the front foot bar (10) and the lower push bar (131) relative to the rear foot bar (11). The frame joint (2) is also provided with a folding linkage mechanism (5) for unfolding or folding the front leg (10) and the lower push rod (131) relative to the rear leg (11). The seat frame linkage (100) is a flexible component and its upper end is connected to the handle bar (130), and its lower end is connected to the front side of the seat frame (12). The seat frame linkage (100) is configured to release the tension on the seat frame (12) when the push rod assembly (13) is folded or retracted, so that the seat frame (12) can be folded. When the push rod assembly (13) is unfolded, the seat frame linkage (100) pulls the seat frame (12) to unfold accordingly. The handlebar (130) is provided with a frame unlocking mechanism (6) for releasing the locking state of the push rod locking mechanism (3), and the frame locking assembly (4) is configured such that after the push rod locking mechanism (3) is released from the locking state, the handlebar (130) is folded to a preset position relative to the lower push rod (131), and then the frame locking assembly (4) is unlocked.

2. A foldable stroller according to claim 1, characterized in that... It also includes a backrest (14), which is rotatably connected to the seat frame (12) via a frame joint (2). A backrest locking mechanism (7) is provided between the backrest (14) and the seat frame (12) for locking the backrest (14) relative to the seat frame (12). A push rod linkage assembly (132) is provided between the handle bar (130) and the lower push rod (131). The backrest locking mechanism (7) and the frame locking assembly (4) are both linked with the push rod linkage assembly (132) and can be unlocked simultaneously.

3. The stroller of claim 1, wherein The handlebar (130) and the lower push rod (131) are foldably connected, and a push rod linkage assembly (132) is provided between the handlebar (130) and the lower push rod (131). The push rod linkage assembly (132) is linked with the frame locking assembly (4). When the push rod locking mechanism (3) is unlocked and the handlebar (130) is folded relative to the lower push rod (131) to a preset position, the push rod linkage assembly (132) is linked with the frame locking assembly (4) to unlock. The frame joint (2) includes a front leg connecting block (20) connected to the upper end of the front leg (10), a rear leg connecting block (21) connected to the upper end of the rear leg (11), a lower push rod connecting block (22) connected to the lower end of the lower push rod (131), and a seat frame connecting block (23) connected to the rear end of the seat frame (12). The front leg connecting block (20), the lower push rod connecting block (22), and the seat connecting block (23) are rotatably connected to the rear leg connecting block (21) via pivot a (200). The folding linkage mechanism (5) is provided between the rear leg connecting block (21), the lower push rod connecting block (22), and the front leg connecting block (20) so that the lower push rod connecting block (22) and the front leg connecting block (20) can be folded or unfolded relative to the rear leg connecting block (21).

4. A foldable stroller according to claim 3, characterized in that... The folding linkage mechanism (5) includes a first linkage piece (51), a second linkage piece (52), and a third linkage piece (53). The first linkage plate (51) has a first connecting part (511), a second connecting part (512) and a third connecting part (513). The third connecting part (513) is located between the first connecting part (511) and the second connecting part (512). The first connecting part (511) is rotatably connected to the rear foot rod connecting block (21). The second connecting part (512) is rotatably connected to one end of the second linkage plate (52). The other end of the second linkage plate (52) is rotatably connected to the lower push rod connecting block (22). One end of the third linkage plate (53) is rotatably connected to the third connecting part (513). The other end of the third linkage plate (53) is rotatably connected to the front foot rod connecting block (20).

5. A foldable stroller according to claim 4, characterized in that... The folding linkage mechanism (5) also includes a fourth linkage piece (54). One end of the third linkage piece (53) and one end of the fourth linkage piece (54) are rotatably connected to the third connecting part (513), and the other end of the fourth linkage piece (54) is rotatably connected to the seat frame connecting block (23).

6. The stroller of claim 4, wherein The folding linkage mechanism (5) includes a linkage guide groove (55) disposed on the rear foot rod connecting block (21) off-axis from the pivot a (200), and the third connecting part (513) is directly or indirectly slidably connected to the linkage guide groove (55).

7. The stroller of claim 3, wherein The folding linkage mechanism (5) further includes a seat frame elastic member (56) disposed between the seat frame connecting block (23) and the rear leg connecting block (21) for providing folding torque to the seat frame connecting block (23). The pivot a (200) passes through the seat frame elastic member (56). One end of the seat frame elastic member (56) abuts against the rear leg connecting block (21), and the other end abuts against the seat frame connecting block (23).

8. A foldable stroller according to claim 3, characterized in that... The folding linkage mechanism (5) further includes a front leg elastic member (57) disposed between the front leg connecting block (20) and the rear leg connecting block (21) for providing folding elastic force to the front leg connecting block (20). The front leg elastic member (57) is eccentrically disposed on the rear leg connecting block (21). One end of the front leg elastic member (57) abuts against the rear leg connecting block (21), and the other end of the front leg elastic member (57) is connected to a push slider (58) that can slide around the pivot a (200) on the rear leg connecting block (21). The push slider (58) abuts against the front leg connecting block (20).

9. A foldable stroller according to claim 3, characterized in that... The frame locking assembly (4) includes a frame locking movable part (40) movably mounted on the lower push rod connecting block (22). The frame locking movable part (40) is provided with a latch (41). The rear leg connecting block (21), the front leg connecting block (20), and the seat frame connecting block (23) are all provided with slots (42) into which the latch (41) can be simultaneously engaged. The lower push rod connecting block (22) is provided with a frame locking elastic part (43) that elastically presses against the frame locking movable part (40) so that the latch (41) can be simultaneously engaged in all slots (42). The rear leg connecting block (21), the front leg connecting block (20), and the seat frame connecting block (23) are all provided with arc-shaped clearance grooves (44) that communicate with the slots (42) and surround the pivot a (200). The push rod linkage assembly (132) is linked with the frame locking movable part (40).

10. A foldable stroller according to claim 3, characterized in that... The push rod locking mechanism (3) includes a handle joint block (1300) and a push rod joint block (1301) that are rotatably connected. The push rod joint block (1301) is provided with a push rod locking hole (30). The handle joint block (1300) is provided with a push rod locking member (31) that can be telescopically inserted into the push rod locking hole (30). The push rod locking member (31) is linked with the frame unlocking mechanism (6). The push rod linkage assembly (132) includes a push rod sliding block (133) and a cam (134). The push rod sliding block (133) is slidably disposed on the push rod joint block (1301). The cam (134) is disposed on the handle joint block (1300) and when the handle joint block (1300) rotates relative to the push rod joint block (1301), the cam (134) pushes the push rod sliding block (133) to slide relative to the push rod joint block (1301), thereby unlocking the frame locking assembly (4).

11. A foldable stroller according to claim 2, characterized in that... The frame joint (2) includes a backrest connecting block (24) connected to the lower end of the backrest (14), a seat frame connecting block (23) connected to the rear end of the seat frame (12), a front leg connecting block (20) connected to the upper end of the front leg (10), a rear leg connecting block (21) connected to the upper end of the rear leg (11), and a lower push rod connecting block (22) connected to the lower end of the lower push rod (131); the backrest connecting block (24), the seat frame connecting block (23), the front leg connecting block (20), and the lower push rod connecting block (22) are rotatably connected to the rear leg connecting block (21) via a pivot a (200); The backrest locking mechanism (7) includes a chuck (70), a chuck elastic element (71), a chuck drive element (72), and a backrest locking element (701). The chuck (70) is disposed on the backrest connecting block (24) and can move axially relative to the backrest connecting block (24) along the pivot a (200). The backrest locking member (701) is disposed in the backrest connecting block (24). The edge of the chuck (70) is formed with a slot (700) for the backrest locking member (701) to be inserted. The chuck elastic member (71) is placed between the chuck (70) and the side of the backrest connecting block (24) away from the seat frame connecting block (23). The chuck (70) is provided with a push block (75) on the middle part of the part of the part of the part of the part of the pivot a (200). The push block (75) is provided with a second inclined surface (75). The chuck drive (72) is mounted on the frame connecting block (23) and is penetrated by the pivot a (200). The chuck drive (72) can rotate around the pivot a (200) and slide radially relative to the frame connecting block (23) at the same time as the frame connecting block (23). The chuck drive (72) is provided with a first inclined surface (74) that abuts against the second inclined surface (75). The chuck drive (72) is linked with the frame locking assembly (4). When the frame locking assembly (4) is unlocked, the chuck drive (72) slides radially relative to the seat frame connecting block (23) to push the chuck (70) to move axially, thereby causing the backrest locking member (701) to disengage from the slot (700) and release the locking state of the backrest (14).

12. A foldable stroller according to claim 3, characterized in that... It also includes a handrail (15), which is rotatably connected to a lower push rod (131). A handrail locking and positioning assembly (9) is provided between the handrail (15) and the lower push rod (131). The handrail locking and positioning assembly (9) is configured to lock when the handrail (15) is unfolded relative to the lower push rod (131), and to position when the handrail (15) is folded relative to the lower push rod (131) so that the handrail (15) remains facing upward for the user to lift. The armrest locking and positioning component (9) is linked with the push rod linkage component (132), and the push rod linkage component (132) is configured to first release the armrest (15) from the locked state, and then link the frame locking component (4) to unlock.

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