CN110294007B

CN110294007B - Baby carriage

Info

Publication number: CN110294007B
Application number: CN201910434006.2A
Authority: CN
Inventors: 卢俊棋; 李文慧; 张德堃; 刘宜捷; 陈帅宗
Original assignee: Xiamen Joya Technology Co ltd
Current assignee: Xiamen Joya Technology Co ltd
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-08-21
Anticipated expiration: 2039-05-23
Also published as: CN110294007A

Abstract

The invention discloses a baby carriage which comprises a frame, a seat, handles, front wheels, rear wheels, a handle reversing mechanism, a front wheel orienting mechanism, a folding mechanism, a brake mechanism and an error-proof folding mechanism, wherein the front wheels are arranged on the frame; the seat is arranged at the upper end of the frame, the lower end of the handle is connected with the upper end of the frame, the handle reversing mechanism is arranged at the joint of the handle and the frame, the front wheel and the rear wheel are respectively arranged at the front end and the rear end of the frame, and the front wheel orienting mechanism, the folding mechanism, the brake mechanism and the mistaken folding preventing mechanism are all arranged on the frame. The parking device is provided with the front wheel orienting mechanism, the wheel orienting mechanism and the brake mechanism, so that the parking device is safe and reliable; the traveling direction of the invention can be changed by operating the handle reversing mechanism, so the invention is convenient to use; because the folding mechanism is arranged, the folding type foldable bicycle can be folded and stored, and the occupied space is small.

Description

Baby carriage

Technical Field

The invention relates to a children product, in particular to a baby carriage.

Background

The baby carriage is a tool carriage designed for providing convenience for outdoor activities of babies, most of the baby carriages in the prior art are foldable baby carriages, the existing baby carriages are required to be manually pulled or pressed to realize the functions of folding or steering and the like when being folded, if a child is held by one hand, the baby carriage is difficult to operate by one hand, and a baby carriage which is safe, reliable and capable of randomly changing the advancing direction is expected to improve the convenient performance of the foldable baby carriage.

Disclosure of Invention

The invention aims to provide a safe and reliable baby carriage which can change the advancing direction at will.

In order to achieve the purpose, the technical solution of the invention is as follows:

the invention relates to a baby carriage which comprises a carriage frame, a seat, a handle, a front wheel, a rear wheel and a handle front-back rotating mechanism, wherein the front wheel is connected with the front wheel; the seat is arranged at the upper end of a frame supporting rod in the frame, the lower end of the handle is connected with the upper end of the frame supporting rod in the frame, the handle front-back rotating mechanism is arranged at the joint of the handle and the frame supporting rod, and the front wheel and the rear wheel are respectively arranged at the front end and the rear end of the frame;

the handle front-back rotating mechanism comprises a rotary fixed seat, a pull handle, a reversing slide block spring, a reversing elastic buckle, an elastic buckle spring and a reversing steel wire; the pull handle is movably sleeved on the handle and is connected with the reversing slide block through a reversing steel wire, the reversing slide block and the reversing elastic buckle are abutted together and are movably installed in a cavity formed by the rotary fixed seat and a rotary seat at the lower end of the handle, a reversing slide block spring is installed in the cavity, two ends of the reversing slide block spring are respectively abutted against the handle rotary seat and the reversing slide block, the rotary fixed seat is arranged at the top end of a support rod of a frame in the frame, and the elastic buckle spring is arranged between the reversing elastic buckle and the rotary fixed seat and is abutted against the reversing elastic buckle and the rotary fixed seat respectively; the reversing slider is provided with inclined plane grooves, the outer side wall of the reversing elastic buckle is provided with two inclined plane convex blocks, the two inclined plane convex blocks are respectively matched with the two inclined plane grooves on the reversing slider, the inner side wall of the reversing elastic buckle is provided with two opposite elastic buckle clamping blocks, the two elastic buckle clamping blocks can be clamped in the elastic buckle clamping grooves on the rotary fixing base, and the four elastic buckle clamping grooves are arranged around the rotating center.

The invention also comprises a front wheel orientation mechanism; the front wheel orienting mechanism comprises a rear cover, a large pulley, a small pulley, an orienting pulley, a front orienting steel wire, an orienting block, an orienting pin, an orienting torsion spring and an orienting spring; the rear cover is buckled with a rotary fixing seat in a front-rear rotating mechanism of the handle to form a rotating cavity, a middle hole of a large pulley is fixedly sleeved on a rotating shaft on a handle rotating seat, a front directional steel wire is arranged in a frame supporting rod in a penetrating way, one end of the front directional steel wire is connected to the large pulley, the middle part of the front directional steel wire is wound on a small pulley, the other end of the front directional steel wire is connected with a directional pulley, the small pulley is rotatably arranged in the frame supporting rod, the middle hole of the directional pulley is fixedly sleeved on the rotating shaft of the directional block, the surface of the directional pulley is provided with two limiting tables, a take-up torsion spring is sleeved on the rotating shaft of the directional block, two ends of the take-up torsion spring are respectively hung on the two limiting tables, the directional torsion spring is sleeved on the rotating shaft of the directional block, two ends of the directional torsion spring are respectively hung on the directional block and the frame, the directional spring is installed in the directional block, and two ends of the directional spring respectively abut against the directional pin and the inner wall of the directional block.

The invention also includes a wheel orientation mechanism; the wheel orientation mechanism is arranged on the frame and comprises an orientation key, a key fixing piece, an elastic block spring, an orientation push rod, a right orientation elastic block, a left orientation elastic block, a right push block and a left push block; the directional key is movably sleeved in a rear wheel mounting box of the frame, the lower end of the directional key is connected with a key fixing piece, the key fixing piece and the directional key are connected or loosened, a bottom inclined block of the directional key is abutted against an inclined plane on a right directional elastic block, the right directional elastic block and the inner side of the rear wheel mounting box of the frame are provided with an elastic block spring, the directional key can drive the right directional elastic block to move outwards, so that a convex buckle on the outer end of the right directional elastic block is separated from a positioning groove on the rear wheel, an outer inclined block of the directional key is abutted against the inclined plane on the right push block, the right push block and the inner side of the rear wheel mounting box of the frame are provided with a return spring to drive the right push block to move towards the left, the right push block drives a left push block arranged in the rear wheel mounting box of the frame on the other side through a directional push rod, and the left push, the left directional elastic block can be driven to move outwards, so that the convex buckle on the left directional elastic block is separated from the positioning groove on the left rear wheel.

The invention also comprises a folding mechanism; the folding mechanism is arranged on the frame and comprises folding keys, a folding key spring, a folding rod, a left folding block, a right folding block, a folding block spring, a folding swing rod, a folding hook torsional spring, a folding slide block, a folding connecting rod and a folding bottom plate; the folding key is movably sleeved in the frame rear wheel mounting box, the folding key spring is arranged between the folding key and the frame rear wheel mounting box, the inclined surface of the lower end of the folding key is abutted against the inclined surface of the outer side of the left folding block, the left folding block is connected with the right folding block through a folding rod, the left folding block and the right folding block are respectively and movably mounted in the frame rear wheel mounting box on the left side and the right side, and two ends of the folding block spring are respectively abutted against the inner walls of the left folding block and the frame rear wheel mounting box; one end of the folding swing rod is hinged with the left folding block, the middle part of the folding swing rod is hinged on the frame, the other end of the folding swing rod is hinged with the free end of the folding hook, one end of the folding hook is hinged on the folding bottom plate, the other end of the folding hook is hinged with the folding sliding block, the folding sliding block is connected on the folding guide rail in a sliding mode, one end of the folding connecting rod is hinged on the frame supporting rod, the other end of the folding connecting rod is connected on the folding sliding block, the two ends of the folding hook torsional spring are respectively connected on the folding hook and the folding bottom plate in a hanging mode.

The invention also comprises an error-folding prevention mechanism which is arranged on the frame and comprises a pull slide block, a front error-folding prevention steel wire, a rear error-folding prevention steel wire, a steel wire slide seat, an error-folding prevention clamping block and an error-folding prevention clamping block spring; the pull slide block is movably sleeved on the handle, the pull slide block is connected with one end of the steel wire slide seat through the anti-misoperation steel wire, the steel wire slide seat is connected in a front wheel mounting box of the frame in a sliding mode, the other end of the steel wire slide seat is connected with the anti-misoperation clamping block through the anti-misoperation steel wire, the anti-misoperation clamping block is connected in a rear wheel mounting box of the frame in a sliding mode and located under a folding key in a folding mechanism, and two ends of the anti-misoperation clamping block spring are respectively abutted against the inner wall of the anti-misoperation clamping block and the inner.

The seat comprises a seat body, a seat handle and a seat rotating mechanism; two ends of the seat handle are respectively connected to two sides of the seat body; the seat rotating mechanism comprises a steering handle, a steering steel wire, a seat pawl and a seat ratchet wheel; the steering handle is hinged to the back of the seat body and connected with the free end of the seat ratchet wheel through a steering steel wire, the seat ratchet wheel is hinged to the seat body and abuts against the gear teeth on the seat ratchet wheel, and the seat ratchet wheel is fixed on the seat handle.

The invention also comprises a brake mechanism, wherein the brake mechanism comprises a brake pedal, a brake rod, a brake connecting rod, a brake spring, a brake sliding block, a brake pad, a brake pressing block, a brake pad connecting rod and a brake pad spring; one end of the brake pedal is hinged on the frame, two side walls of the lower part of the brake pedal are inclined planes which incline from outside to inside, the side wall of the brake pedal abuts against the inner end of the brake rod, the outer end of the brake rod is connected with the brake slider through the brake connecting rod, the middle part of the brake connecting rod is hinged on the rear wheel mounting box of the frame, the brake slider is connected in the rear wheel mounting box of the frame in a sliding way, the bottom inclined plane of the brake slider abuts against the top inclined plane of the brake press block, one end of the brake pad is hinged on the wheel carrier of the rear wheel of the frame, the free end of the brake pad is provided with a, the brake convex block can be clamped in a clamping groove on the rear wheel, the upper end of the brake pad connecting rod abuts against the lower surface of the brake pressing block, the lower end of the brake pad connecting rod is hinged to the middle of the brake pad, the brake spring is sleeved on the brake rod, the two ends of the brake spring respectively abut against the stop pin of the frame and the brake rod, and the two ends of the brake pad spring respectively abut against the inner wall of the rear wheel mounting box of the brake pressing block and the frame.

And a limiting rib is longitudinally arranged on two side walls of the lower part of the brake pedal.

The brake mechanism comprises a brake seat, a brake pedal, a brake rod, a brake hook, a hook torsional spring, a pedal tension spring, a brake pressing block, a brake connecting rod, a brake spring and a brake pad; the brake seat is fixed on the frame, the brake pedal is movably sleeved in the middle of the brake rod, two ends of a pedal tension spring are respectively connected on the brake rod and the brake pedal, two inner ends of the brake pedal are respectively hinged with a brake hook, two hanging feet of a hook torsion spring are respectively connected on the free end of the brake hook and the brake pedal, the inner end of the brake pedal is sleeved in the brake seat in a clearance way, a limit lug is arranged on the inner wall of the brake seat, the free end of the brake hook hinged on the brake pedal abuts against the top surface of the limit lug or the bottom surface of the limit lug on the inner wall of the brake seat, so that the brake pedal is in a loose or braking state, the brake rod is connected with a brake block, the brake block is movably arranged in a rear wheel mounting box of the frame, the brake spring abuts against the inner wall of the rear wheel mounting box of the brake block and the frame, a brake connecting rod is fixed on the brake block, the lower end, one end of the brake block is hinged on a wheel carrier of a rear wheel of the frame, and a brake lug is arranged at the free end of the brake block and can be clamped in a clamping groove on the rear wheel.

The front wheel and the rear wheel are universal wheels; the universal wheel comprises a wheel carrier, a wheel shaft, a directional ring, a disassembly block, a disassembly spring and a brake pad; the rotating shaft of the wheel is rotatably arranged at the lower part of the wheel carrier, a plurality of clamping grooves are formed in the outer edge of the wheel, the wheel shaft is fixed at the top of the wheel carrier and is rotatably arranged on the frame through a bearing, the directional ring is fixed on the top surface of the wheel carrier, and the directional ring is provided with a positioning groove for the convex buckle to be clamped in; one end of the brake block is hinged on the wheel carrier, the free end of the brake block is provided with a brake lug, the brake lug can be clamped in a plurality of clamping grooves on the outer edge of the wheel, and the lower end of the wheel shaft is hinged with the middle part of the brake block; the middle part of the disassembling block is provided with a wheel shaft clamping groove which is an elongated groove, the middle part of the elongated groove is expanded towards two sides to form an expansion hole, the disassembling block is movably sleeved in a rear wheel mounting box of the frame, the outer end of the disassembling block extends out of the rear wheel mounting box of the frame, the elongated groove at the inner end of the disassembling block is sleeved in an annular groove at the top of the wheel shaft, and two ends of the disassembling spring are respectively propped against the disassembling block and the rear wheel mounting box.

After the scheme is adopted, the baby stroller comprises a frame, a seat, a handle, a front wheel, a rear wheel and a handle reversing mechanism, and the handle reversing mechanism is arranged, so that a user can conveniently change the advancing direction of the baby stroller, and a pusher can face a baby in the seat or the baby faces the advancing direction as required; furthermore, the handle can be changed backwards through the front wheel orientation mechanism and the wheel orientation mechanism, and the front wheel and the rear wheel are adjusted to be universal or oriented according to the advancing direction, so that a user can conveniently push the cart; furthermore, the parking safety and reliability of the parking device are ensured through a brake mechanism; furthermore, the folding mechanism is arranged, so that the foldable bicycle can be folded and stored, and the occupied space is small. Meanwhile, the user can conveniently realize the directional or universal adjustment and folding storage of the wheels under the condition that the user holds a child or carries objects with one hand.

The invention is further described with reference to the following figures and specific embodiments.

Drawings

FIG. 1 is an isometric view of the present invention;

FIG. 2 is a left side isometric view of the seat of the present invention;

FIG. 3 is a right isometric view of the seat of the present invention;

FIG. 4 is a left perspective exploded view of the handle forward and backward rotation mechanism of the present invention;

FIG. 5 is a right side exploded perspective view of the handle forward and backward rotation mechanism of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 4 at A;

FIG. 7 is an enlarged view of a portion of FIG. 5 at B;

FIG. 8 is an exploded perspective view of the front wheel orientation mechanism of the present invention;

FIG. 9 is a top isometric view of a first embodiment of the brake mechanism of the present invention;

FIG. 10 is a bottom isometric view of a first embodiment of the braking mechanism of the present invention;

FIG. 11 is an isometric elevational view of a first embodiment of the brake mechanism of the present invention;

FIG. 12 is a partially exploded view of the first embodiment of the braking mechanism of the present invention;

FIG. 13 is an isometric view of a braking condition of a second embodiment of the brake mechanism of the present invention;

FIG. 14 is a side isometric view of a second embodiment of the brake mechanism of the present invention;

FIG. 15 is a bottom isometric view of a second embodiment of the brake mechanism of the present invention;

FIG. 16 is an isometric view of a second embodiment of the braking mechanism of the present invention in an unbraked condition;

figure 17 is a side cross-sectional view of the wheel orientation mechanism of the present invention;

figure 18 is a side isometric view of the wheel orientation mechanism of the present invention;

figure 19 is a top isometric view of the wheel orientation mechanism of the present invention;

FIG. 20 is an isometric view of the folding mechanism of the present invention;

FIG. 21 is a top isometric view of the folding mechanism of the present invention;

FIG. 22 is a side cross-sectional view of the rear wheel of the present invention with the removal block removed;

FIG. 23 is an isometric view of the rear wheel of the present invention;

FIG. 24 is an isometric view of a first handle reversing step of the present invention;

FIG. 25 is an isometric view of a second step in the reversing of the handle of the present invention;

FIG. 26 is an isometric view of the front wheel brake of the present invention;

FIG. 27 is an isometric view of the rear wheel brake of the present invention;

FIG. 28 is an isometric view of a first folding step of the present invention;

FIG. 29 is an isometric view of a second folding step of the present invention;

FIG. 30 is an isometric view of a third folding step of the present invention;

figure 31 is a schematic view of the present invention with the wheel removed.

Detailed Description

As shown in fig. 1, the present invention is a stroller, which comprises a frame 1, a seat 2, a handle 3, a handle front-back rotating mechanism 4, a front wheel orienting mechanism 5, a wheel orienting mechanism 6, a folding mechanism 7, a brake mechanism 8, an anti-miscompression mechanism 9, a front wheel 10, and a rear wheel 20.

The seat 2 is arranged at the upper end of a frame supporting rod 11 in the frame 1, the lower end of a handle 3 is connected with the upper end of the frame supporting rod 11 in the frame 1, a handle front-back rotating mechanism 4 is arranged at the joint of the handle 3 and the frame supporting rod 11, a front wheel 10 and a rear wheel 20 are respectively arranged at the front end and the rear end of the frame 1, and a front wheel orienting mechanism 5, a wheel orienting mechanism 6, a folding mechanism 7, a brake mechanism 8 and an error-preventing folding mechanism 9 are all arranged on the frame 1.

As shown in fig. 2 and 3, the seat 2 includes a seat body 21, a seat handle 22, and a seat rotation mechanism 23; two ends of the seat handle 22 are respectively connected to two sides of the seat body 21; the seat rotating mechanism 23 comprises a steering handle 231, a steering steel wire 232, a seat pawl 233 and a seat ratchet wheel 234; the steering handle 231 is hinged to the back of the seat body 231, the steering handle 231 is connected with the free end of a seat pawl 233 through a steering steel wire 232, the seat pawl 233 is hinged to the seat body 21, the seat pawl 233 abuts against gear teeth on a seat ratchet wheel 234, and the seat ratchet wheel 234 is fixed on the seat handle 22.

As shown in fig. 4-8, the handle front-back rotating mechanism 4 includes a rotating fixing seat 41, a pull handle 42, a reversing slider 43, a reversing slider spring 44, a reversing snap 45, a snap spring 46, and a reversing steel wire 47; the pull handle 42 is movably sleeved on the handle 3, the pull handle 42 is connected with a reversing slide block 43 through a reversing steel wire 47, the reversing slide block 43 and a reversing elastic buckle 45 are abutted together and are movably installed in a cavity 48 formed by a rotary fixed seat 41 and a rotary seat 31 at the lower end of the handle 3, a reversing slide block spring 44 is installed in the cavity 48, two ends of the reversing slide block spring 44 are abutted against the rotary seat 31 of the handle 3 and the reversing slide block 43 respectively, the rotary fixed seat 41 is arranged at the top end of a frame support rod 11 in the frame 1, elastic buckle springs 46 are arranged between the reversing elastic buckle 45 and the rotary fixed seat 41 and are abutted against the reversing elastic buckle 45 and the rotary fixed seat 41 respectively, a middle hole 432 of the reversing slide block 43, a middle hole 453 of the reversing elastic buckle 45, the elastic buckle spring 46 and a middle hole 412 of the rotary fixed seat 41 are fixedly sleeved on a rotating shaft 32 on the rotary seat 31, the outer side wall of the reversing elastic buckle 45 is provided with two inclined plane convex blocks 451, the two inclined plane convex blocks 451 are respectively matched with two inclined plane grooves 431 on the reversing sliding block 43, the inner side wall of the reversing elastic buckle 45 is provided with two opposite elastic buckle clamping blocks 452, the two elastic buckle clamping blocks 452 can be clamped in the elastic buckle clamping groove 411 on the rotary fixed seat 41, four elastic buckle clamping grooves 411 are arranged around the rotating center, the pull handle 42 is lifted upwards, the reversing sliding block 43 is lifted upwards through the reversing steel wire 47, the transverse pressure of the inclined plane groove 431 on the reversing sliding block 43 to the reversing elastic buckle 45 is removed, the reversing elastic buckle 45 moves outwards under the action of the reset force of the elastic buckle spring 46, so that the elastic buckle clamping block 452 on the inner side of the reversing elastic buckle 45 is separated from the elastic buckle clamping groove 411 on the rotary fixed seat 41, the handle 3 is pushed, the pull force of the pull handle 42 is removed at the moment, under the action of the reset, the reversing slider 43 returns downward, and through the cooperation of the inclined plane groove 431 and the inclined plane projection 451 of the reversing latch 45, an inward pressure is provided to the reversing latch 45, and when the handle 3 rotates by a certain angle, the latch block 452 is clamped into the next set of latch clamping grooves 411, so that the handle is reversed (as shown in fig. 24 and 25).

As shown in fig. 4-8, the front wheel orientation mechanism 5 includes a rear cover 51, a large pulley 52, a small pulley 53, an orientation pulley 54, a front orientation wire 55, an orientation block 56, an orientation pin 57, an orientation torsion spring 58, and an orientation spring 59; the rear cover 51 is buckled with the rotary fixed seat 41 in the handle front-rear rotating mechanism 4 to form a rotating cavity, the middle hole 521 in the large pulley 52 is fixedly sleeved on the rotating shaft 32 on the rotating seat 31 of the handle 3, the front directional steel wire 55 is arranged in the frame supporting rod 11 in a penetrating manner, one end of the front directional steel wire 55 is connected to the large pulley 52, the middle part of the front directional steel wire 55 is wound on the small pulley 53, the other end of the front directional steel wire 55 is connected with the directional pulley 54, the small pulley 53 is rotatably arranged in the frame supporting rod 11, the middle hole 541 of the directional pulley 54 is fixedly sleeved on the rotating shaft 561 of the directional block 56, the surface of the directional pulley 54 is provided with two limiting tables 542, the take-up torsion spring 543 is sleeved on the rotating shaft 561 of the directional block 56, two ends of the take-up torsion spring are respectively hung on the two limiting tables 542, when the handle 3 is rotated and returned, auxiliary recovery force is provided for the front, the two ends of the directional torsion spring 58 are respectively hung on the directional block 56 and the frame 1, the directional torsion spring 58 is used for providing auxiliary force for the directional pin 57 on the directional block 56 to be disengaged from the positioning hole 101 on the front wheel 10, the upper end of the directional pin 57 is movably sleeved on the positioning block 56, the lower end of the directional pin 57 can be inserted into the positioning hole 101 of the front wheel 10 and used for rotatably positioning the front wheel 10, the directional spring 59 is installed in the directional block 56, the two ends of the directional spring 59 respectively abut against the inner walls of the directional pin 57 and the directional block 56, and the directional pin 57 applies always downward pressure to facilitate the front wheel 10 to be inserted into the positioning hole 101 during the rotary positioning of the front wheel 10 in use.

The brake mechanism has two embodiments:

example 1: as shown in fig. 9-12, the brake mechanism 8 includes a brake pedal 81, a brake lever 82, a brake link 83, a brake spring 84, a brake slider 85, a brake pad 86, a brake block 87, a brake pad link 88, and a brake pad spring 89; one end of the brake pedal 81 is hinged on the frame 1, two side walls 811 at the lower part of the brake pedal 81 are inclined planes inclined from outside to inside, the side wall 811 of the brake pedal 81 abuts against the inner end 822 of the brake rod 82, two side walls 811 at the lower part of the brake pedal 81 are longitudinally provided with a limiting rib 812, the outer end of the brake rod 82 is connected with the brake slider 85 through the brake connecting rod 83, the middle part of the brake connecting rod 83 is hinged on the rear wheel mounting box 12 of the frame 1, the brake slider 85 is slidingly connected in the rear wheel mounting box 12 of the frame 1, the bottom inclined plane of the brake slider 85 abuts against the top inclined plane of the brake pressing block 87, one end of the brake block 86 is hinged on the wheel frame 202 of the rear wheel 20 of the frame 1, the free end of the brake block 86 is provided with a brake bump 861 which can be clamped in the clamping groove 201 on the rear wheel 20, the upper end of the brake block connecting rod 88 abuts against the lower, the lower end of the brake pad connecting rod 88 is hinged with the middle part of the brake pad 86, the brake spring 84 is sleeved on the brake rod 82, the two ends of the brake spring 84 respectively abut against the frame 1 and the stop pin 821 of the brake rod 82, and the two ends of the brake pad spring 89 respectively abut against the brake pressing block 87 and the inner wall of the rear wheel mounting box 12 of the frame 1.

When the brake is to be prepared, the brake pedal 81 is stepped, because the two side walls 811 at the lower part of the brake pedal 81 are inclined planes inclined from outside to inside, the brake rod 82 moves towards the outside end, and further drives the brake slide block 85 to move inwards and transversely, the bottom inclined plane of the brake slide block 85 abuts against the top inclined plane of the brake press block 87, so that the transversely moving brake slide block 85 can drive the brake press block 87 to vertically press the brake pad connecting rod 88 downwards, and compress the brake pad spring 89, drive the brake bump 861 of the brake pad 86 to be clamped into the clamping groove 201 on the rear wheel 20, and because the inner end 822 of the brake rod 82 slides through the limiting rib 812 and is clamped into the brake positioning space 813, the brake state can be realized; when the brake pedal 81 is lifted up, the inner end 822 of the brake rod 82 slides over the limiting rib 812 from the brake positioning space 813, the brake rod 82 moves towards the inner end under the action of the brake spring 84, and simultaneously, under the action of the resetting force of the brake pad spring 89, the pressure between the brake sliding block 85 and the brake pressing block 87 is released, the brake projection 861 of the brake pad 86 is pulled out from the clamping groove 201 on the rear wheel 20, and the brake is released.

Example 2: as shown in fig. 13-16, the brake mechanism 8A includes a brake base 81A, a brake pedal 82A, a brake lever 83A, a brake hook 84A, a hook torsion spring 85A, a pedal tension spring 86A, a brake press block 87A, a brake link 88A, a brake spring 89A, and a brake pad 810A; the brake seat 81A is fixed on the frame 1A, the brake pedal 82A is movably sleeved in the middle of the brake rod 83A, two ends of a pedal tension spring 86A are respectively connected to the brake rod 83A and the brake pedal 82A, two sides of the inner end of the brake pedal 82A are respectively hinged with a brake hook 84A, two hanging feet of a hook torsion spring 85A are respectively hung on the free end of the brake hook 84A and the brake pedal 82A, the inner end of the brake pedal 82A is sleeved in the brake seat 81A in a clearance manner, a limit bump 811A is arranged on the inner wall of the brake seat 81A, the free end of the brake hook 84A hinged on the brake pedal 82A is abutted against the top surface 8111A of the limit bump 811A or the bottom surface 8112A of the limit bump 811A on the inner wall of the brake seat 81A, so that the brake pedal 82A is in a loose or brake state, the brake rod 83A is connected with a brake block 87A, the brake block 87A is movably installed in the rear wheel installation box 12A of the frame 1A, the brake spring 89A is propped against the inner wall of the brake block 87A and the rear wheel mounting box 12A of the frame 1A, the brake connecting rod 88A is fixed on the brake block 87A, the lower end of the brake connecting rod 88A is hinged with the middle part of the brake block 810A, one end of the brake block 810A is hinged on the wheel carrier 202A of the rear wheel 20A of the frame A1, the free end of the brake block 810A is provided with a brake bump 861A, and the brake bump 861A can be clamped in a clamping groove 201A on the rear wheel 20A.

When the brake pedal 82A is trodden, the brake pedal 82A drives the brake rod 83A to move downwards, the brake connecting rod 88A is vertically pressed downwards through the brake pressing block 87A, the brake spring 89A is compressed, the brake bump 861A of the brake pad 810A is driven to be clamped into the clamping groove 201A on the rear wheel 20A, and as the two sides of the inner end of the brake pedal 82A are respectively hinged with the brake clamping hook 84A, when the brake pedal 82A is trodden, the free end of the brake clamping hook 84A slides to the bottom surface 8112A from the top surface 8111A of the limit 811 bump A of the brake seat 81A, the brake state can be realized; when the brake is released, the brake pedal 82A is kicked inwards, the brake pedal 82A moves inwards relative to the brake rod 83A, the pedal tension spring 86A is stretched, the free end of the brake hook 84A is separated from the bottom surface 8112A of the limiting lug 811A, and under the common reset force of the hook torsion spring 85A, the pedal tension spring 86A and the brake spring 89A, the free end of the brake hook 84A returns to the top surface 8111A of the limiting lug 811A, so that the brake is released.

As shown in fig. 17-19, the wheel orientation mechanism 6 includes an orientation button 61, a button fixing member 62, a spring 63, an orientation push rod 64, a right orientation spring 65, a left orientation spring 66, a right push block 67, and a left push block 68; the directional key 61 is movably sleeved in the rear wheel mounting box 12 of the frame 1, the lower end of the directional key 61 is connected with a key fixing piece 62, the key fixing piece 62 can hold or release the directional key 61 to form two states of connection or release, the key fixing piece 62 adopts a ball pen pressing structure, a bottom inclined block 611 of the directional key 61 is abutted against an inclined plane 651 on a right directional elastic block 65, the right directional elastic block 65 and the inner side of the rear wheel mounting box 12 of the frame 1 are provided with an elastic block spring 63, the directional key 61 can drive the right directional elastic block 65 to move outwards and simultaneously compress the elastic block spring 63, a convex buckle 652 on the outer end of the right directional elastic block 65 is disengaged from a positioning groove 203 on the rear wheel 20, meanwhile, an outer inclined block 612 of the directional key 61 is abutted against the inclined plane on the right push block 67, a return spring 69 is arranged on the right push block 67 and the inner side of the rear wheel mounting box 12 of the frame 1, the right push block 67 is driven to move towards the left side, a return spring 69 is compressed, the right push block 67 drives a left push block 68 arranged in the rear wheel mounting box 12 of the frame 1 on the other side through a directional push rod 64, the left push block 68 and the inner side of the rear wheel mounting box 12 of the frame 1 are provided with a return spring 69, the return spring 69 is compressed when the left push block 68 moves towards the left side, the left push block 68 is abutted against the inclined surface of the left directional elastic block 66, the left directional elastic block 66 and the inner side of the rear wheel mounting box 12 of the frame 1 are provided with an elastic block spring 63, the left directional elastic block 66 can be driven to move outwards when the left push block 68 moves towards the left side, the elastic block spring 63 is compressed, a convex buckle on the left directional elastic block 66 is separated from a positioning groove 203 on the rear wheel 20 on the left side, the directional limitation of the wheels can be removed, the universal motion of the wheels can be realized, the directional key, under the combined action of the restoring forces of the elastic block spring 63 and the return spring 69, the convex button on the outer end of the left directional elastic block 66 and the convex button 652 on the outer end of the right directional elastic block 65 are clamped into the positioning groove 203 on the rear wheel 20 again to realize the wheel orientation.

As shown in fig. 20 and 21, the folding mechanism 7 includes a folding button 71, a folding button spring 72, a folding rod 73, a left folding block 74, a right folding block 75, a folding block spring 76, a folding swing rod 77, a folding hook 78, a folding hook torsion spring 79, a folding slider 710, a folding link 711, and a folding base 713; the folding key 71 is movably sleeved in the rear wheel mounting box 12 of the frame 1, the folding key spring 72 is arranged between the folding key 71 and the rear wheel mounting box 12 of the frame 1, the inclined surface 714 at the lower end of the folding key 71 is abutted against the inclined surface 741 outside the left folding block 74, the left folding block 74 is connected with the right folding block 75 through the folding rod 73, the left folding block 74 and the right folding block 75 are respectively and movably mounted in the rear wheel mounting box 12 of the frame 1 on the left side and the right side, and two ends of the folding block spring 76 are respectively abutted against the inner walls of the left folding block 74 and the rear wheel mounting box 12 of the frame 1; one end of the folding swing rod 77 is hinged to the left folding block 74, the middle of the folding swing rod 77 is hinged to the frame 1, the other end of the folding swing rod 77 is hinged to the free end of the folding hook 78 (the installation manner of the right folding swing rod 77 is the same as that of the left folding swing rod 77), one end of the folding hook 78 is hinged to the folding base plate 713, the other end of the folding hook 78 is hinged to the folding slider 710, the folding slider 710 is slidably connected to the folding guide rail 715 (as shown in fig. 28), one end of the folding link 711 is hinged to the frame support rod 11, the other end of the folding link 711 is connected to the folding slider 710, the two ends of the folding hook torsion spring 79 are respectively connected to the folding hook 78 and the folding base plate 713, the folding base plate 713 is installed on the frame 1, and the folding.

As shown in fig. 20 and 21, the anti-misoperation folding mechanism 9 includes a pull slider 91, a front anti-misoperation steel wire 92, a rear anti-misoperation steel wire 93, a steel wire slide 94, an anti-misoperation latch 95, and an anti-misoperation latch spring 96; the pull slide block 91 is movably sleeved on the handle 3, the pull slide block 91 is connected with one end of a steel wire slide seat 94 through an anti-misoperation steel wire 92, the steel wire slide seat 94 is in sliding connection with a front wheel mounting box 13 of the frame 1, the other end of the steel wire slide seat 94 is connected with an anti-misoperation fixture block 95 through a rear anti-misoperation steel wire 93, the anti-misoperation fixture block 95 is in sliding connection with a rear wheel mounting box 12 of the frame 1 and is positioned under a folding key 71 in the folding mechanism 7, and two ends of an anti-misoperation fixture block spring 96 respectively abut against the inner walls of the anti-misoperation fixture block 95 and the rear wheel mounting box 12.

When folding, the pulling-up slider 91 moves the anti-misoperation block 95 forward through the anti-misoperation steel wire, and compresses the anti-misoperation block spring 96, and presses down the folding button 71, and the left folding block 74 and the right folding block 75 move rightward through the cooperation of the lower end inclined plane 714 of the folding button 71 and the outer side inclined plane 741 of the left folding block 74, and drives the folding swing rods 77 at both sides to swing, so that the folding hooks 78 at both sides are separated from the folding slider 710, and the handle 3 is pressed down, and the folding slider 710 moves backward along the folding guide rail 715, so that the folding of the whole vehicle can be realized, as shown in fig. 28-30.

As shown in fig. 22 and 23, the front wheel 10 and the rear wheel 20 are universal wheels 30; the universal wheel 30 comprises a wheel frame 301, a wheel 302, a wheel shaft 303, an orientation ring 304, a disassembly block 305, a disassembly spring 306 and a brake pad 307; a rotating shaft 3021 of the wheel 302 is rotatably mounted at the lower part of the wheel frame 301, a plurality of clamping grooves 3022 are arranged at the outer edge of the wheel 302, the wheel shaft 303 is fixed at the top of the wheel frame 301 and is rotatably mounted on the frame 1 through a bearing, the orientation ring 304 is fixed at the top surface of the wheel frame 301, and a positioning groove 3041 is arranged on the orientation ring 304 to allow the convex buckle to be clamped in to realize the directional rolling of the wheel; one end of the brake block 307 is hinged on the wheel carrier 301, a brake lug 3071 is arranged on the free end of the brake block 307, the brake lug 3071 can be clamped in a plurality of clamping grooves 3022 on the outer edge of the wheel 302, and the lower end of the wheel shaft 303 is hinged with the middle part of the brake block 307.

The middle of the detaching block 305 is provided with an axle clamping groove 3051, the axle clamping groove 3051 is a long groove, the middle of the long groove expands towards two sides to form an expanding hole 3052, the detaching block 305 is movably sleeved in the rear wheel mounting box 12 of the frame 1, the outer end of the detaching block 305 extends out of the rear wheel mounting box 12 of the frame 1, the long groove at the inner end of the detaching block 305 is sleeved in the annular groove 3031 at the top of the axle 303, and two ends of the detaching spring 306 are partially abutted against the detaching block 305 and the rear wheel mounting box 12.

The working principle of the invention is as follows:

1. as shown in fig. 24 and 25, the direction change: (1) the orientation of the rear wheel 20 can be realized by treading down the orientation button 61 in the wheel orientation mechanism 6, and the orientation limit of the rear wheel 20 can be released by treading down the wheel orientation mechanism 6, so that universal rotation is realized; (2) the pull handle 42 in the handle front-back rotating mechanism 4 is pulled by hand, the handle 3 is pushed forward, the reversing can be realized, namely, the state in fig. 24 is changed into the state in fig. 25, meanwhile, the vehicle body is swung, the front wheel 10 rotates automatically, namely, the orientation pin 57 in the front wheel orientation mechanism 5 is inserted into the positioning hole 101, the orientation of the front wheel 10 is realized, if the state in fig. 25 is changed into the state in fig. 24, similarly, the pull handle 42 in the handle front-back rotating mechanism 4 is pulled by hand, the handle 3 is pushed forward, the orientation limit of the rear wheel 20 can be released, and the universal rotation is realized.

2. As shown in fig. 26 and 27, braking: (1) a front wheel brake key 40 is stepped (the working principle of the front wheel brake is the same as that of the prior art); (2) the rear wheel brake can be realized by stepping on the brake pedal 81 in the rear wheel brake mechanism 8.

3. As shown in fig. 28 to 30, folded storage: (1) the pulling slide block 91 in the mistaken folding preventing mechanism 9 is pulled upwards; (2) lifting slightly in the direction a, the folding hooks 78 in the folding mechanism 7 disengage from the folding slider 710 (as shown in fig. 20); (3) a single foot downwardly steps on a folding button 71 (as shown in fig. 20) in the folding mechanism 7; (4) the vehicle can be folded by pressing downwards.

4. As shown in fig. 31, the wheel is disassembled: the wheel 302 can be detached from the frame 1 by pressing the detaching block 305 of the universal wheel 30.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.

Claims

1. A stroller, characterized in that: comprises a frame, a seat, a handle, a front wheel, a rear wheel, a handle front-back rotating mechanism and a front wheel orienting mechanism; the seat is arranged at the upper end of a frame supporting rod in the frame, the lower end of the handle is connected with the upper end of the frame supporting rod in the frame, the handle front-back rotating mechanism is arranged at the joint of the handle and the frame supporting rod, and the front wheel and the rear wheel are respectively arranged at the front end and the rear end of the frame;

the handle front-back rotating mechanism comprises a rotary fixed seat, a pull handle, a reversing slide block spring, a reversing elastic buckle, an elastic buckle spring and a reversing steel wire; the pull handle is movably sleeved on the handle and is connected with the reversing slide block through a reversing steel wire, the reversing slide block and the reversing elastic buckle are abutted together and are movably installed in a cavity formed by the rotary fixed seat and a rotary seat at the lower end of the handle, a reversing slide block spring is installed in the cavity, two ends of the reversing slide block spring are respectively abutted against the handle rotary seat and the reversing slide block, the rotary fixed seat is arranged at the top end of a support rod of a frame in the frame, and the elastic buckle spring is arranged between the reversing elastic buckle and the rotary fixed seat and is abutted against the reversing elastic buckle and the rotary fixed seat respectively; the reversing slide block center hole, the reversing elastic buckle center hole, the elastic buckle spring and the rotary fixing seat center hole are fixedly sleeved on a rotating shaft on the rotary seat; the reversing slide block is provided with two inclined plane grooves, the outer side wall of the reversing elastic buckle is provided with two inclined plane convex blocks, the two inclined plane convex blocks are respectively matched with the two inclined plane grooves on the reversing slide block, the inner side wall of the reversing elastic buckle is provided with two opposite elastic buckle clamping blocks, the two elastic buckle clamping blocks can be clamped in elastic buckle clamping grooves on the rotary fixing seat, and the four elastic buckle clamping grooves are arranged around the rotary center;

the front wheel orienting mechanism comprises a rear cover, a large pulley, a small pulley, an orienting pulley, a front orienting steel wire, an orienting block, an orienting pin, an orienting torsion spring and an orienting spring; the rear cover is buckled with a rotary fixing seat in a front-rear rotating mechanism of the handle to form a rotating cavity, a middle hole of a large pulley is fixedly sleeved on a rotating shaft on a handle rotating seat, a front directional steel wire is arranged in a frame supporting rod in a penetrating way, one end of the front directional steel wire is connected to the large pulley, the middle part of the front directional steel wire is wound on a small pulley, the other end of the front directional steel wire is connected with a directional pulley, the small pulley is rotatably arranged in the frame supporting rod, the middle hole of the directional pulley is fixedly sleeved on the rotating shaft of the directional block, the surface of the directional pulley is provided with two limiting tables, a take-up torsion spring is sleeved on the rotating shaft of the directional block, two ends of the take-up torsion spring are respectively hung on the two limiting tables, the directional torsion spring is sleeved on the rotating shaft of the directional block, two ends of the directional torsion spring are respectively hung on the directional block and the frame, the directional spring is installed in the directional block, and two ends of the directional spring respectively abut against the directional pin and the inner wall of the directional block.

2. The stroller of claim 1, wherein: also includes a wheel orientation mechanism; the wheel orientation mechanism is arranged on the frame and comprises an orientation key, a key fixing piece, an elastic block spring, an orientation push rod, a right orientation elastic block, a left orientation elastic block, a right push block and a left push block; the directional key is movably sleeved in a rear wheel mounting box of the frame, the lower end of the directional key is connected with a key fixing piece, the key fixing piece and the directional key are connected or loosened, a bottom inclined block of the directional key is abutted against an inclined plane on a right directional elastic block, the right directional elastic block and the inner side of the rear wheel mounting box of the frame are provided with an elastic block spring, the directional key can drive the right directional elastic block to move outwards, so that a convex buckle on the outer end of the right directional elastic block is separated from a positioning groove on the rear wheel, an outer inclined block of the directional key is abutted against the inclined plane on the right push block, the right push block and the inner side of the rear wheel mounting box of the frame are provided with a return spring to drive the right push block to move towards the left, the right push block drives a left push block arranged in the rear wheel mounting box of the frame on the other side through a directional push rod, and the left push, the left directional elastic block can be driven to move outwards, so that the convex buckle on the left directional elastic block is separated from the positioning groove on the left rear wheel.

3. The stroller of claim 1, wherein: also comprises a folding mechanism; the folding mechanism is arranged on the frame and comprises folding keys, a folding key spring, a folding rod, a left folding block, a right folding block, a folding block spring, a folding swing rod, a folding hook torsional spring, a folding slide block, a folding connecting rod and a folding bottom plate; the folding key is movably sleeved in the frame rear wheel mounting box, the folding key spring is arranged between the folding key and the frame rear wheel mounting box, the inclined surface of the lower end of the folding key is abutted against the inclined surface of the outer side of the left folding block, the left folding block is connected with the right folding block through a folding rod, the left folding block and the right folding block are respectively and movably mounted in the frame rear wheel mounting box on the left side and the right side, and two ends of the folding block spring are respectively abutted against the inner walls of the left folding block and the frame rear wheel mounting box; one end of the folding swing rod is hinged with the left folding block, the middle part of the folding swing rod is hinged on the frame, the other end of the folding swing rod is hinged with the free end of the folding hook, one end of the folding hook is hinged on the folding bottom plate, the other end of the folding hook is hinged with the folding sliding block, the folding sliding block is connected on the folding guide rail in a sliding mode, one end of the folding connecting rod is hinged on the frame supporting rod, the other end of the folding connecting rod is connected on the folding sliding block, the two ends of the folding hook torsional spring are respectively connected on the folding hook and the folding bottom plate in a hanging mode.

4. The stroller of claim 3, wherein: the anti-misoperation folding mechanism is arranged on the frame and comprises a pull slide block, a front anti-misoperation steel wire, a rear anti-misoperation steel wire, a steel wire slide seat, an anti-misoperation clamping block and an anti-misoperation clamping block spring; the pull slide block is movably sleeved on the handle, the pull slide block is connected with one end of the steel wire slide seat through the anti-misoperation steel wire, the steel wire slide seat is connected in a front wheel mounting box of the frame in a sliding mode, the other end of the steel wire slide seat is connected with the anti-misoperation clamping block through the anti-misoperation steel wire, the anti-misoperation clamping block is connected in a rear wheel mounting box of the frame in a sliding mode and located under a folding key in a folding mechanism, and two ends of the anti-misoperation clamping block spring are respectively abutted against the inner wall of the anti-misoperation clamping block and the inner.

5. The stroller of claim 1, wherein: the seat comprises a seat body, a seat handle and a seat rotating mechanism; two ends of the seat handle are respectively connected to two sides of the seat body; the seat rotating mechanism comprises a steering handle, a steering steel wire, a seat pawl and a seat ratchet wheel; the steering handle is hinged to the back of the seat body and connected with the free end of the seat ratchet wheel through a steering steel wire, the seat ratchet wheel is hinged to the seat body and abuts against the gear teeth on the seat ratchet wheel, and the seat ratchet wheel is fixed on the seat handle.

6. The stroller of claim 1, wherein: the brake mechanism comprises a brake pedal, a brake rod, a brake connecting rod, a brake spring, a brake sliding block, a brake pad, a brake pressing block, a brake pad connecting rod and a brake pad spring; one end of the brake pedal is hinged on the frame, two side walls of the lower part of the brake pedal are inclined planes which incline from outside to inside, the side wall of the brake pedal abuts against the inner end of the brake rod, the outer end of the brake rod is connected with the brake slider through the brake connecting rod, the middle part of the brake connecting rod is hinged on the rear wheel mounting box of the frame, the brake slider is connected in the rear wheel mounting box of the frame in a sliding way, the bottom inclined plane of the brake slider abuts against the top inclined plane of the brake press block, one end of the brake pad is hinged on the wheel carrier of the rear wheel of the frame, the free end of the brake pad is provided with a, the brake convex block can be clamped in a clamping groove on the rear wheel, the upper end of the brake pad connecting rod abuts against the lower surface of the brake pressing block, the lower end of the brake pad connecting rod is hinged to the middle of the brake pad, the brake spring is sleeved on the brake rod, the two ends of the brake spring respectively abut against the stop pin of the frame and the brake rod, and the two ends of the brake pad spring respectively abut against the inner wall of the rear wheel mounting box of the brake pressing block and the frame.

7. The stroller of claim 6, wherein: and a limiting rib is longitudinally arranged on two side walls of the lower part of the brake pedal.

8. The stroller of claim 6, wherein: the brake mechanism comprises a brake seat, a brake pedal, a brake rod, a brake hook, a hook torsional spring, a pedal tension spring, a brake pressing block, a brake connecting rod, a brake spring and a brake pad; the brake seat is fixed on the frame, the brake pedal is movably sleeved in the middle of the brake rod, two ends of a pedal tension spring are respectively connected on the brake rod and the brake pedal, two inner ends of the brake pedal are respectively hinged with a brake hook, two hanging feet of a hook torsion spring are respectively connected on the free end of the brake hook and the brake pedal, the inner end of the brake pedal is sleeved in the brake seat in a clearance way, a limit lug is arranged on the inner wall of the brake seat, the free end of the brake hook hinged on the brake pedal abuts against the top surface of the limit lug or the bottom surface of the limit lug on the inner wall of the brake seat, so that the brake pedal is in a loose or braking state, the brake rod is connected with a brake block, the brake block is movably arranged in a rear wheel mounting box of the frame, the brake spring abuts against the inner wall of the rear wheel mounting box of the brake block and the frame, a brake connecting rod is fixed on the brake block, the lower end, one end of the brake block is hinged on a wheel carrier of a rear wheel of the frame, and a brake lug is arranged at the free end of the brake block and can be clamped in a clamping groove on the rear wheel.

9. The stroller of claim 1, wherein: the front wheel and the rear wheel are universal wheels; the universal wheel comprises a wheel carrier, a wheel shaft, a directional ring, a disassembly block, a disassembly spring and a brake pad; the rotating shaft of the wheel is rotatably arranged at the lower part of the wheel carrier, a plurality of clamping grooves are formed in the outer edge of the wheel, the wheel shaft is fixed at the top of the wheel carrier and is rotatably arranged on the frame through a bearing, the directional ring is fixed on the top surface of the wheel carrier, and the directional ring is provided with a positioning groove for the convex buckle to be clamped in; one end of the brake block is hinged on the wheel carrier, the free end of the brake block is provided with a brake lug, the brake lug can be clamped in a plurality of clamping grooves on the outer edge of the wheel, and the lower end of the wheel shaft is hinged with the middle part of the brake block; the middle part of the disassembling block is provided with a wheel shaft clamping groove which is an elongated groove, the middle part of the elongated groove is expanded towards two sides to form an expansion hole, the disassembling block is movably sleeved in a rear wheel mounting box of the frame, the outer end of the disassembling block extends out of the rear wheel mounting box of the frame, the elongated groove at the inner end of the disassembling block is sleeved in an annular groove at the top of the wheel shaft, and two ends of the disassembling spring are respectively propped against the disassembling block and the rear wheel mounting box.