阅读说明：本技术 一种便于折叠操作的婴儿手推车 (Baby's handcart convenient to folding operation ) 是由 许永煌 杨勇祥 于 2019-11-14 设计创作，主要内容包括：本发明公开了一种便于折叠操作的婴儿手推车,包括有手把组件、车架组件、座位组件、关节机构及轮脚组件,在后脚管的底部通过后轮连接轴连接有后轮组,后轮组朝上折叠后使后脚管的底端朝下凸出形成支地结构；在后脚管上设置有解锁按钮,解锁按钮对接有拉绳固定件,拉绳固定件连接有拉绳,拉绳的下端连接有卡销,后轮组的上端具有卡槽,在卡销伸出时插入在卡槽中固定后轮组。本发明通过将手把组、车架组、座架支撑管、前后轮组件及座位组件等连接成可相对旋转的结构,在折叠时只要解锁折弯关节后即可单手下压手把组,操作方便,省时省力,单手即可完成操作；同时还能将后轮组一起折叠,使折叠后的车体没有轮子着地,站立更稳定。(The invention discloses a baby stroller convenient for folding operation, which comprises a handle assembly, a frame assembly, a seat assembly, a joint mechanism and a caster assembly, wherein the bottom of a rear caster is connected with a rear caster assembly through a rear caster connecting shaft; be provided with the unblock button on the foot pipe of back, the unblock button is docked there is the stay cord mounting, and the stay cord mounting is connected with the stay cord, and the lower extreme of stay cord is connected with the bayonet lock, and the upper end of rear wheel group has the draw-in groove, inserts fixed rear wheel group in the draw-in groove when the bayonet lock stretches out. According to the folding handlebar, the handlebar group, the frame group, the seat frame supporting tube, the front wheel assembly, the rear wheel assembly, the seat assembly and the like are connected into a structure capable of rotating relatively, the handlebar group can be pressed down by one hand only after the bending joint is unlocked during folding, the folding handlebar is convenient to operate, time and labor are saved, and the operation can be finished by one hand; meanwhile, the rear wheel set can be folded together, so that the folded vehicle body can stand more stably without wheels touching the ground.)

1. A baby stroller convenient for folding operation comprises a handle assembly, a frame assembly, a seat assembly, a joint mechanism and a caster assembly, wherein the handle assembly and the caster assembly are respectively connected with the frame assembly through the joint mechanism to form a rotatable structure; the handle assembly is connected with the seat frame supporting tube through a bending joint to form a relatively rotatable structure, the middle position of the seat frame supporting tube is connected with a rear foot tube of the caster assembly through a rotating shaft to form a lever type structure, and a front foot tube of the caster assembly is connected with the seat frame supporting tube through a front foot connecting sheet to form a linkage structure with the seat frame supporting tube and the handle assembly; be provided with in the hand (hold) subassembly and receive the car button, receive the car button and bend the joint through receiving the car rope cooperation and strike the unblock and form and receive car control structure, its characterized in that: the bottom of the rear foot tube is connected with a rear wheel set which can be rotated and folded through a rear wheel connecting shaft, and the rear wheel set is folded upwards to enable the bottom end of the rear foot tube to protrude downwards to form a ground supporting structure; an unlocking button is arranged on the rear foot tube and extends out of the seat frame supporting tube to form a structure which can be pressed down by the folded seat frame supporting tube; the unlocking button is butted with a movable pull rope fixing piece, the pull rope fixing piece is connected with a pull rope, the lower end of the pull rope is connected with a clamping pin capable of moving up and down, and the clamping pin extends out of a section below the bottom end of the rear foot tube in a natural state; the upper end of the rear wheel set is provided with a clamping groove matched with the clamping pin, and the clamping pin is inserted into the clamping groove when extending out to form a fixing structure for the rear wheel set; the unlocking button is pressed down through the seat supporting tube, so that the unlocking button pushes the pull rope fixing piece to pull the clamping pin upwards to be separated from the clamping groove of the rear wheel set, and an unlocking structure of the rear wheel set is formed.

2. A stroller according to claim 1, wherein: the inner side of the front end of the vehicle driving pipe of the frame assembly is provided with a seat pipe sliding sleeve, and two side seat pipes of the seat assembly respectively penetrate through the seat pipe sliding sleeve and are connected with the middle lower section of the seat driving supporting pipe through a rotating shaft to form a rotatable structure.

3. A stroller according to claim 1, wherein: the frame component is characterized by further comprising a handrail pipe, a handrail sliding sleeve is arranged on the inner side of the middle section of the driving pipe of the frame component, and two sides of the handrail pipe penetrate through the handrail sliding sleeve respectively and are connected with the middle-upper section of the driving supporting pipe through a rotating shaft to form a rotatable structure.

4. A stroller according to claim 1, wherein: the pull rope fixing piece is an eccentric rotating piece with a protruding part, the eccentric rotating piece is arranged in the rear foot tube through a shaft pin, the protruding part of the pull rope fixing piece is in butt joint with the unlocking button, the upper end of the pull rope is connected to one side of the pull rope fixing piece, and the protruding part of the pull rope fixing piece is pushed by pressing the unlocking button so that the pull rope fixing piece rotates to pull the pull rope; after the rear wheel set is folded, the rear foot tube and the bending joint form a ground supporting structure together.

5. A stroller according to claim 1, wherein: the upper portion of back foot pipe is T type head structure, and frame pipe front end of frame subassembly and the rear end of this T type head connect into rotatable structure, and the rear end of preceding foot pipe and the front end of this T type head connect into rotatable structure.

6. A stroller according to claim 1, wherein: the front part of the seat supporting tube is of an upturned structure so as to form a structure for pulling the front foot connecting sheet upwards and backwards; the transition position of the flat straight section and the upwarp section of the seat supporting pipe is connected with the upper section of the rear foot pipe through a rotating shaft, and the connecting position is higher than the position of the unlocking button.

7. A stroller according to claim 1, wherein: the handle assembly comprises a handle lower pipe and a handle upper pipe, the handle upper pipe is inserted in the handle lower pipe to form a telescopic structure, and the bottom end of the handle lower pipe passes through a bending joint and the seat driving supporting pipe; the vehicle folding button is arranged on the bottom surface of the top of the upper handlebar tube, and the vehicle folding rope penetrates through the upper handlebar tube and the lower handlebar tube to be connected with the bending joint; the rear end of a frame tube of the frame component is connected with the lower part of the handle lower tube through a rotating shaft to form a structure capable of rotating relatively.

8. A stroller according to claim 1, wherein: the lower part of the rear foot tube is provided with a vehicle folding hook which extends backwards, and the lower part of the lower tube of the handle component is provided with a vehicle folding shaft which can be buckled into the vehicle folding hook to lock the folding vehicle body.

9. A stroller according to claim 7, wherein: the lower part of the lower handle pipe is provided with a rotatable umbrella cover group, and the umbrella cover group is of a structure locked with the upper handle pipe and synchronously slides along with the downward adjustment of the upper handle pipe.

10. A stroller according to claim 1, wherein: the middle-upper section position between the rear foot pipes is also connected with a rotatable vegetable basket group, the front end of the vegetable basket group is coaxially connected with the front end of the seat supporting pipe and the rear end of the front foot connecting sheet to form a linkage rotating structure, and the rear part of the vegetable basket group extends backwards to form a structure for containing vegetable baskets.

Technical Field

The invention relates to the technical field of infant articles, in particular to an infant handcart which can be conveniently folded and unfolded.

Background

Along with the improvement of living standard, the handcart becomes the necessary tool of infant, puts infant on the car and is pushed by adult and walk not only can make things convenient for big people's nursing action greatly, can also make baby's self more comfortable, also more safe simultaneously. The foldable hand cart generally comprises a handle, a frame, a seat frame, a front wheel set, a rear wheel set, a joint assembly and the like, wherein the handle is connected with the frame, the frame is connected with the front wheel set and the rear wheel set through corresponding rotatable joints, and the handle and the frame can rotate relatively to realize folding. However, most of the prior children's carriages need to manually and independently pull (or push) the handle tube, the front leg tube, the rear leg tube, the seat frame tube and other parts to realize folding, so that the linkage folding is not convenient to realize, the operation is troublesome, time and labor are wasted, the operation is difficult to be completed by one hand, inconvenience is brought to users with weak manual ability, and the children's carriages are particularly not beneficial to old people and women. In addition, at least one of the front and rear wheels usually contacts the ground after being folded, so that the sliding is easy to occur during placement, and the stability after placement is not good enough.

Disclosure of Invention

The invention aims to solve the technical problem of providing a baby stroller which has more reasonable structural design, more convenient and labor-saving unfolding operation and folding operation, can realize the complete folding of a frame main body and a rear wheel set by one hand and has more stable standing after folding.

In order to solve the technical problems, the invention adopts the following technical scheme: a baby stroller convenient for folding operation comprises a handle assembly, a frame assembly, a seat assembly, a joint mechanism and a caster assembly, wherein the handle assembly and the caster assembly are respectively connected with the frame assembly through the joint mechanism to form a rotatable structure; the handle assembly is connected with the seat frame supporting tube through a bending joint to form a relatively rotatable structure, the middle position of the seat frame supporting tube is connected with a rear foot tube of the caster assembly through a rotating shaft to form a lever type structure, and a front foot tube of the caster assembly is connected with the seat frame supporting tube through a front foot connecting sheet to form a linkage structure with the seat frame supporting tube and the handle assembly; be provided with in the hand (hold) subassembly and receive the car button, receive the car button and bend the joint through receiving the car rope cooperation and strike the unblock and form and receive car control structure, its characterized in that: the bottom of the rear foot tube is connected with a rear wheel set which can be rotated and folded through a rear wheel connecting shaft, and the rear wheel set is folded upwards to enable the bottom end of the rear foot tube to protrude downwards to form a ground supporting structure; an unlocking button is arranged on the rear foot tube and extends out of the seat frame supporting tube to form a structure which can be pressed down by the folded seat frame supporting tube; the unlocking button is butted with a movable pull rope fixing piece, the pull rope fixing piece is connected with a pull rope, the lower end of the pull rope is connected with a clamping pin capable of moving up and down, and the clamping pin extends out of a section below the bottom end of the rear foot tube in a natural state; the upper end of the rear wheel set is provided with a clamping groove matched with the clamping pin, and the clamping pin is inserted into the clamping groove when extending out to form a fixing structure for the rear wheel set; the unlocking button is pressed down through the seat supporting tube, so that the unlocking button pushes the pull rope fixing piece to pull the clamping pin upwards to be separated from the clamping groove of the rear wheel set, and an unlocking structure of the rear wheel set is formed.

Furthermore, a seat tube sliding sleeve is arranged at the inner side of the front end of the vehicle driving tube of the frame assembly, seat tubes on two sides of the seat assembly respectively penetrate through the seat tube sliding sleeve and are connected with the middle-lower section of the seat supporting tube through a rotating shaft to form a rotatable structure, and the seat tube is finally folded to be attached to the vehicle frame tube in the folding process of the vehicle body due to the fact that the seat tube is sleeved by the seat tube sliding sleeve, and manual additional operation is not needed.

Furthermore, the automobile seat support device further comprises a handrail tube, a handrail sliding sleeve is arranged on the inner side of the middle section of the driving tube of the automobile frame assembly, two sides of the handrail tube penetrate through the handrail sliding sleeve respectively and are connected with the middle-upper section of the seat support tube through a rotating shaft to form a rotatable structure, and the handrail tube is finally folded to be attached to the automobile frame tube without manual additional operation due to the fact that the handrail tube is sleeved by the handrail sliding sleeve in the folding process of the automobile body.

Further, the pull rope fixing piece is an eccentric rotating piece with a protruding part, the eccentric rotating piece is installed in the rear foot tube through a shaft pin, the protruding part of the pull rope fixing piece is in butt joint with the unlocking button, the upper end of the pull rope is connected to one side of the pull rope fixing piece, and the protruding part of the pull rope fixing piece is pushed by pressing the unlocking button so that the pull rope fixing piece rotates to pull the pull rope; after the rear wheel set is folded, the rear foot tube and the bending joint form a ground supporting structure together so as to stably stand on the ground. When the automobile body is folded, the seat driving supporting tube just presses down the unlocking button, the unlocking button pushes the pull rope fixing piece to rotate so as to pull the pull rope, the pull rope pulls up the bayonet lock, the bayonet lock is separated from the clamping groove in the upper end of the rear wheel set, and the rear wheel set can be folded forwards and upwards along the rotation of the rear wheel connecting shaft at the moment.

Furthermore, the upper part of the rear foot tube is of a T-shaped head structure, the front end of the frame tube of the frame assembly is connected with the rear end of the T-shaped head to form a rotatable structure, the rear end of the front foot tube is connected with the front end of the T-shaped head to form a rotatable structure, and when the folding bicycle is folded, the rear foot tube is used as the center, and all parts are drawn close to the rear foot tube.

Furthermore, the front part of the seat supporting tube is of an upturned structure so as to form a structure for pulling the front foot connecting sheet upwards and backwards; the transition position of the flat straight section and the upwarp section of the seat supporting tube is connected with the upper section of the rear foot tube through a rotating shaft, and the joint is higher than the position of the unlocking button, so that the unlocking button is pressed down when the seat supporting tube is drawn close to the rear foot tube.

Furthermore, the handle assembly comprises a handle lower pipe and a handle upper pipe, the handle upper pipe is inserted in the handle lower pipe to form a telescopic structure, and the bottom end of the handle lower pipe is connected with the seat support pipe through a bending joint; the vehicle folding button is arranged on the bottom surface of the top of the upper handlebar tube, and the vehicle folding rope penetrates through the upper handlebar tube and the lower handlebar tube to be connected with the bending joint; the rear end of a frame tube of the frame component is connected with the lower part of the handle lower tube through a rotating shaft to form a structure capable of rotating relatively. It should be noted that the rotary folding function of the partial structure can be directly realized by applying the existing folding baby carrier structure.

Furthermore, a vehicle folding hook extending backwards is arranged at the lower part of the rear foot tube, a vehicle folding shaft capable of being buckled into the vehicle folding hook to lock the folding vehicle body is arranged at the lower part of the handle lower tube of the handle assembly, the folding vehicle body cannot be scattered after the vehicle folding shaft is buckled into the vehicle folding hook, and the vehicle folding shaft is firstly pulled out of the vehicle folding hook when the vehicle body needs to be unfolded.

Furthermore, a rotatable umbrella cover group is installed at the lower part of the lower handle pipe to play a role in shading sun, the umbrella cover group is in a structure locked with the upper handle pipe and synchronously slides along with the downward adjustment of the upper handle pipe, and the realization structure of the umbrella cover group can be directly realized by utilizing the prior art.

Furthermore, the middle-upper section between the rear foot pipes is connected with a rotatable vegetable basket group, the front end of the vegetable basket group is coaxially connected with the front end of the seat supporting pipe and the rear end of the front foot connecting piece to form a linkage rotating structure, and the rear part of the vegetable basket group extends backwards to form a structure for containing vegetable baskets, so that the problem that vegetables are not easy to carry when a child is bought by people can be solved.

When the folding button is pressed down and the handle upper tube is pressed to the lowest gear, the umbrella cover group and the handle upper tube move downwards together, the bending joint is unlocked, the handle assembly is pushed forwards, and simultaneously the frame tube and the seat frame support tube are linked to be drawn together and folded towards the direction of the backward foot tube, and the frame tube, the handle lower tube, the seat frame support tube and the backward foot tube form a four-connecting-rod linkage folding structure; when the seat supporting tube rotates downwards, the seat supporting tube is simultaneously linked with the front foot connecting piece to drive the front foot tube to be close to the rear foot tube to rotate and be folded, and is also linked with the vegetable basket group to be folded together. When the seat supporting tube is folded, the seat frame tube is driven to slide backwards in the seat tube sliding sleeve, and the handrail tube slides backwards in the handrail sliding sleeve to be rotatably folded. The frame tube continues to be drawn to the rear foot tube to be folded until the frame is completely folded, and the folding hook is buckled. When deployed, the operation is reversed.

According to the folding bicycle, the handle group, the bicycle frame group, the seat frame supporting tube, the front wheel assembly, the rear wheel assembly, the seat assembly and the like are connected through the joint and the rotating shaft mechanism to form a structure capable of rotating relatively, and the handle group can be pressed down by one hand after a folding button is pressed to unlock a bent joint during folding, so that the bicycle frame group, the front wheel assembly, the rear wheel assembly, the seat assembly and the like are all folded and folded in a linkage manner, the folding operation is convenient, time and labor are saved, the operation can be completed by one hand, and the folding bicycle is; meanwhile, the rear wheel set can be automatically folded upwards together, so that the folded vehicle body has no wheels to land, the standing is more stable, and the placement is convenient. And the size becomes small after the vehicle platform is folded, and the vehicle platform is convenient to carry.

Drawings

FIG. 1 is a block diagram of the present invention in an expanded state;

FIG. 2 is an exploded view of the present invention;

FIGS. 3-6 are schematic diagrams of the folding process of the present invention;

FIG. 7 is a schematic view of the folding process of the rear wheel set after the vehicle body is folded;

FIG. 8 is a cross-sectional view of the control structure of the rear wheel set in the deployed state;

fig. 9 is a cross-sectional view of the control structure in the folded state of the rear wheel set.

In the figure, 11 is a handle upper tube, 12 is a handle lower tube, 13 is a folding button, 14 is a folding axle, 15 is a canopy group, 2 is a bending joint, 3 is a frame tube, 4 is a seat frame support tube, 5 is a rear foot tube, 51 is a rear wheel group, 52 is a T-shaped head, 53 is a rear wheel connecting shaft, 54 is an unlocking button, 55 is a pull rope fixing piece, 56 is a shaft pin, 57 is a pull rope, 58 is a bayonet, 59 is a clamping groove, 50 is a folding hook, 6 is a basket group, 7 is a seat frame tube, 71 is a seat tube sliding sleeve, 8 is a front foot tube, 81 is a front foot connecting piece, 9 is a handrail tube, and 91 is a handrail sliding sleeve.

Detailed Description

In this embodiment, referring to fig. 1 to 9, the stroller convenient for folding operation includes a handle assembly, a frame assembly, a seat assembly, a joint mechanism and a caster assembly, wherein the handle assembly and the caster assembly are respectively connected to the frame assembly through the joint mechanism to form a rotatable structure, and the seat assembly is mounted on the frame assembly to form a rotatable structure; the handle assembly is connected with the seat frame supporting tube 4 through the bending joint 2 to form a relatively rotatable structure, the middle position of the seat frame supporting tube 4 is connected with the rear foot tube 5 of the caster assembly through a rotating shaft to form a lever type structure, and the front foot tube 8 of the caster assembly is connected with the seat frame supporting tube 4 through the front foot connecting sheet 81 to form a linkage structure with the seat frame supporting tube 4 and the handle assembly; a vehicle folding button 13 is arranged in the handle assembly, and the vehicle folding button 13 is matched with the bending joint 2 through a vehicle folding rope to impact and unlock to form a vehicle folding control structure; the bottom of the rear foot tube 5 is connected with a rear wheel set 51 which can be rotatably folded through a rear wheel connecting shaft 53, and the rear wheel set 51 is folded upwards to enable the bottom end of the rear foot tube 5 to protrude downwards to form a ground supporting structure; an unlocking button 54 is arranged on the rear foot tube 5, and the unlocking button 54 extends towards the seat frame supporting tube 4 to form a structure which can be pressed down by the folded seat frame supporting tube 4; the unlocking button 54 is butted with a movable pull rope fixing piece 55, the pull rope fixing piece 55 is connected with a pull rope 57, the lower end of the pull rope 57 is connected with a clamping pin 58 capable of moving up and down, and the clamping pin 58 extends out of a section below the bottom end of the rear foot tube 5 in a natural state; the upper end of the rear wheel set 51 is provided with a clamping groove 59 matched with the clamping pin 58, and when the clamping pin 58 extends out, the clamping groove 59 is inserted to form a fixed structure for the rear wheel set 51; the unlocking button 54 is pressed down through the seat support tube 4, so that the unlocking button 54 pushes the pull rope fixing piece 55 to pull the clamping pin 58 upwards to be separated from the clamping slot 59 of the rear wheel set 51, and an unlocking structure for the rear wheel set 51 is formed.

The seat tube sliding sleeves 71 are arranged at the inner side positions of the front ends of the seat tubes 3 of the frame assembly, the seat tubes 7 on two sides of the seat assembly respectively penetrate through the seat tube sliding sleeves 71 and are connected with the middle-lower sections of the seat support tubes 4 through rotating shafts to form a rotatable structure, and the seat tubes 7 are sleeved by the seat tube sliding sleeves 71 in the folding process of the vehicle body, so that the seat tubes 7 can be finally folded to be attached to the frame tubes 3 without manual additional operation.

Still including handrail pipe 9, the car of frame subassembly drives 3 middle section positions inboard and is equipped with handrail sliding sleeve 91, and handrail pipe 9's both sides pass handrail sliding sleeve 91 respectively and connect into rotatable structure through pivot and the well upper segment position of seat support tube 4, because handrail pipe 9 is entangled by handrail sliding sleeve 91 at the folding in-process of automobile body for handrail pipe 9 can finally be folded to leaning on mutually with car frame pipe 3 and lean on, need not artifical additional operation.

The pull-cord fixing member 55 is an eccentric rotating member having a protrusion, and is installed in the rear leg tube 5 through a shaft pin 56, the protrusion of the pull-cord fixing member 55 is butted against the unlocking button 54, the upper end of the pull cord 57 is connected to one side of the pull-cord fixing member 55, and the pull cord 57 is pulled by pressing the unlocking button 54 to push the protrusion of the pull-cord fixing member 55 to rotate the pull-cord fixing member 55; after the rear wheel set 51 is folded, the rear foot tube 5 and the bending joint 2 together form a ground supporting structure so as to stably stand on the ground. When the vehicle body is folded, the seat support tube 4 just presses the unlocking button 54, the unlocking button 54 pushes the pull rope fixing piece 55 to rotate so as to pull the pull rope 57, the pull rope 57 pulls the clamping pin 58, the clamping pin 58 is separated from the clamping groove 59 at the upper end of the rear wheel set 51, and at the moment, the rear wheel set 51 can rotate along the rear wheel connecting shaft 53 to be folded forwards and upwards.

The upper part of the rear foot tube 5 is a T-shaped head structure, the front end of the frame tube 3 of the frame component is connected with the rear end of the T-shaped head 52 to form a rotatable structure, the rear end of the front foot tube 8 is connected with the front end of the T-shaped head 52 to form a rotatable structure, and when the bicycle is folded, the rear foot tube 5 is used as the center, and all parts are closed towards the rear foot tube 5.

The front part of the seat supporting tube 4 is of an upturned structure so as to form a structure that the front foot connecting piece 81 is pulled upwards and backwards; the transition position of the straight section and the upwarp section of the seat supporting tube 4 is connected with the upper section of the rear foot tube 5 through a rotating shaft, and the joint is higher than the position of the unlocking button 54, so that the unlocking button is pressed down when the seat supporting tube 4 is drawn close to the rear foot tube 5.

The handle assembly comprises a handle lower pipe 12 and a handle upper pipe 11, the handle upper pipe 11 is inserted in the handle lower pipe 12 to form a telescopic structure, and the bottom end of the handle lower pipe 12 passes through a bending joint 2 and a seat driving support pipe 4; the vehicle folding button 13 is arranged on the bottom surface of the top of the upper handle tube 11, and a vehicle folding rope passes through the upper handle tube 11 and the lower handle tube 12 to be connected with the bending joint 2; the rear end of a frame tube 3 of the frame component is connected with the lower part of a handle lower tube 12 through a rotating shaft to form a structure capable of rotating relatively. It should be noted that the rotary folding function of the partial structure can be directly realized by applying the existing folding baby carrier structure.

The lower part of the rear foot tube 5 is provided with a vehicle retracting hook 50 extending backwards, the lower part of the handle lower tube 12 of the handle assembly is provided with a vehicle retracting shaft 14 which can be buckled into the vehicle retracting hook 50 to lock the folding vehicle body, the folded vehicle body can not be scattered after the vehicle retracting shaft 14 is buckled into the vehicle retracting hook 50, and the vehicle retracting shaft 14 is firstly pulled out of the vehicle retracting hook 50 when the vehicle body is unfolded.

A rotatable canopy assembly 15 is mounted to the lower portion of the handle down tube 12 for sunshade.

The upper middle section between the rear foot tubes 5 is also connected with a rotatable vegetable basket group 6, the front end of the vegetable basket group 6 is coaxially connected with the front end of the seat supporting tube 4 and the rear end of the front foot connecting piece 81 to form a linkage rotating structure, and the rear part of the vegetable basket group 6 extends backwards to form a structure for containing vegetable baskets, so that the problem that the vegetable is not easy to carry when a child is brought.

By pressing the folding button 13 and pressing the upper handlebar tube 11 to the lowest gear, the umbrella cover group 15 moves downwards together with the upper handlebar tube 11, unlocks the bending joint 2, pushes the handlebar assembly forwards, and simultaneously links the frame tube 3 and the seat frame support tube 4 to close and fold towards the direction of the rear foot tube 5, so that the frame tube 3, the lower handlebar tube 12, the seat frame support tube 4 and the rear foot tube 5 form a four-connecting-rod linkage folding structure; when the seat support tube 4 rotates downwards, the seat support tube is simultaneously linked with the front foot connecting piece 81 to drive the front foot tube 8 to close to the rear foot tube 5 to rotate for folding, and simultaneously is also linked with the vegetable basket group 6 to fold together. When the seat support tube 4 is folded, the seat support tube 7 is driven to slide backwards in the seat tube sliding sleeve 71, and the handrail tube 9 slides backwards in the handrail sliding sleeve 91 to be rotatably folded. The frame tube 3 is closed to the rear foot tube 5 until the frame is completely closed, and the closing hook 50 is buckled. When deployed, the operation is reversed.

The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.