CN112678060A

CN112678060A - Foldable trolley for children

Info

Publication number: CN112678060A
Application number: CN201910993052.6A
Authority: CN
Inventors: 杜浩明
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2021-04-20

Abstract

The invention relates to the technical field of children trolleys, in particular to a folding trolley for children, which comprises a supporting frame, wherein a seat plate assembly is arranged on the supporting frame, the seat plate assembly comprises a seat plate and a backrest, a push rod assembly is arranged at one tail end of the supporting frame, the push rod assembly comprises a push rod lower through hole and a push rod upper through hole, a front wheel assembly is arranged at the other tail end of the supporting frame, the front wheel assembly comprises a front wheel rolling device arranged at the end part of the supporting frame and a pedal arranged on the supporting frame, a protection device is further arranged on the push rod lower through hole, a folding assembly is further arranged on the supporting frame, and a rear wheel assembly. The folding storage box is convenient to fold and store, convenient to carry and convenient for a user to use.

Description

Foldable trolley for children

Technical Field

The invention relates to the technical field of children's trolleys, in particular to a folding trolley for children.

Background

The baby stroller is a stroller for children to sit, but a common baby stroller cannot be folded when being used, so that the baby stroller occupies a large space and brings inconvenience for carrying the baby stroller to go out.

Disclosure of Invention

The present invention is directed to a foldable stroller for children to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: a folding handcart for children comprises a supporting frame, wherein a seat plate assembly is arranged on the supporting frame, a push rod assembly is arranged at one tail end of the supporting frame, and a front wheel assembly is arranged at the other tail end of the supporting frame;

the seat plate assembly comprises a seat plate and a backrest, two bases which are symmetrical to each other are arranged at the bottom of the seat plate, first clamping holes which are rectangular in cross section and communicated with the outside are formed in the bases, two first protruding blocks which are symmetrical to each other are arranged at the bottom of the backrest, and a backrest adjusting device is further arranged at the bottom of the backrest;

the push rod assembly comprises a push rod lower through and a push rod upper through;

the front wheel assembly comprises a front wheel rolling device arranged at the end part of the supporting frame and pedals arranged on the supporting frame.

Preferably, the backrest adjusting device comprises a backrest telescopic sleeve, a front side sleeving box is arranged on the backrest telescopic sleeve, a rear side sleeving box is arranged on the front side sleeving box, the front side sleeving box and the rear side sleeving box are connected in a rotating mode through a rotating shaft, and tooth clamping grooves are formed in one side face, adjacent to the front side sleeving box and the rear side sleeving box, of the front side sleeving box.

Preferably, a backrest adjusting latch block is arranged between the front side splicing box and the rear side splicing box, latches on the backrest adjusting latch block are in snap fit with two adjacent latches in the latch groove, a first return spring is arranged between the backrest adjusting latch block and the cavity wall of the front side splicing box, one end of the first return spring is fixedly arranged on the groove wall of the tooth clamping groove in the front side socket box, the other end of the first return spring is fixedly arranged on the backrest adjusting latch block, the rear side sleeve box is also provided with a backrest support rod, the backrest support rod is rotationally connected with the two first lugs through a rotating shaft, a backrest adjusting button is further arranged on the rear side sleeve box, the backrest adjusting button is further provided with two symmetrical abutting blocks, and the tail ends of the abutting blocks penetrate through the rear side sleeving box and are located in the clamping tooth grooves.

Preferably, the push rod upper channel is inserted into a sliding groove in the push rod lower channel and is in sliding connection with the sliding groove in the push rod lower channel, a second clamping hole communicated with the outside is formed in the end part rod body of the push rod lower channel, which is far away from the push rod upper channel, a torsion spring is further arranged in the sliding groove in the push rod lower channel, one end of the torsion spring is fixedly installed on the groove wall of the sliding groove in the push rod lower channel, a locking passing marble is arranged at the other end of the torsion spring, the locking passing marble is in clamping fit with the second clamping hole, and a tail end convex ring of the locking passing marble is clamped at an inner side hole opening of the second clamping hole.

Preferably, the tail end of the push rod upper channel is provided with a push rod handle, the push rod lower channel is further provided with a square hoop, the square hoop is fixedly installed on the push rod lower channel through a plurality of socket nails, the square hoop is further rotatably connected with the hoop holding handle through a rotating shaft, a stop block is further arranged between the hoop holding handle and the square hoop, the stop block penetrates through the push rod lower channel and the hoop holding handle, the tail end of the stop block abuts against the outer surface of the push rod upper channel, and an irregular bulge is arranged on the hoop holding handle.

Preferably, the front wheel rolling device comprises a front wheel support tube which is horizontally and tightly welded on the end part of a support frame, two front wheel shock absorbing seats which are symmetrical to each other are arranged on the front wheel support tube, the front wheel support tube is in inserted fit with the front wheel shock absorbing seats and is fixed by a socket nail, a front wheel is arranged on the front wheel shock absorbing seat, a convex column is arranged on the front wheel, the top end of the convex column penetrates through the front wheel shock absorbing seat and is provided with a convex ring, a snap spring is further wound on the convex column and is positioned below the convex ring and is abutted against the top surface of the front wheel shock absorbing seat, a damping spring is further wound on the convex column, one end of the damping spring is fixedly arranged on the convex column, the other end of the damping spring is fixedly arranged on the inner wall of the front wheel shock absorbing seat, two clamping seats which are symmetrical to each other are arranged on the pedal, and the two clamping seats are sleeved on the support frame and can, the two clamping seats are fixed through fastening screws.

Preferably, the push rod lower tube is further provided with a protection device, the protection device comprises a support tube which is tightly welded on the push rod lower tube, two ends of the support tube are respectively provided with a support tube sleeve, the support tube sleeve is provided with a guardrail sleeve, and a guardrail is arranged between the guardrail sleeves.

Preferably, the folding device further comprises a folding assembly, the folding assembly is arranged on the supporting frame, and the folding assembly comprises an upper joint and a lower joint.

Preferably, the bicycle further comprises a rear wheel assembly, the rear wheel assembly is arranged on the supporting frame, and the rear wheel assembly is composed of a rear wheel rolling device, a supporting device and a tightening device.

Compared with the prior art, the invention has the beneficial effects that:

1. the seat plate assembly is convenient for children to sit, the angle of the backrest can be adjusted, and the seat plate assembly is convenient for users to use.

2. The push rod assembly is arranged, so that the length of the push rod upper channel can be conveniently adjusted, and the device can be pushed to move by aiming at accompanying personnel with different heights, so that convenience is brought to users.

3. The folding assembly is arranged, so that the upper joint and the lower joint can be conveniently folded when needed, and the two fixing rods can be conveniently folded towards the middle position through the arranged rear wheel assembly, so that the whole volume of the folding mechanism is reduced, and the folding mechanism is convenient to carry.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the folding assembly of the present invention;

FIG. 3 is a schematic view of the upper joint of the present invention;

FIG. 4 is an exploded view of the upper joint of the present invention;

FIG. 5 is an exploded view of the folding assembly of the present invention;

FIG. 6 is an exploded view of the clamping support device of the present invention;

FIG. 7 is an exploded view of the bayonet mount of the present invention;

FIG. 8 is a partial cross-sectional view of the construction of the card support and the docking fixture of the present invention;

FIG. 9 is a partial cross-sectional view of the bayonet mount of the present invention;

FIG. 10 is an enlarged view taken at A of FIG. 9 in accordance with the present invention;

FIG. 11 is a schematic view of the structure of the seat plate assembly of the present invention;

fig. 12 is an exploded view of the seat plate assembly of the present invention;

FIG. 13 is a cross-sectional view of the backrest and backrest adjustment means of the present invention;

FIG. 14 is a schematic view of the backrest adjusting means of the present invention after deployment;

fig. 15 is an exploded view of the backrest adjusting means of the present invention;

FIG. 16 is a schematic view of the structure of the seat and folding assembly of the present invention;

FIG. 17 is a schematic view of the structure of the protection device of the present invention;

FIG. 18 is an exploded view of the pushrod assembly, seat plate assembly and folding assembly of the present invention;

FIG. 19 is a schematic structural view of the push rod assembly, seat plate assembly and folding assembly of the present invention;

FIG. 20 is a cross-sectional view of the push rod assembly of the present invention;

FIG. 21 is an enlarged view taken at B of FIG. 20 in accordance with the present invention;

FIG. 22 is a schematic view of the push rod down tube of the present invention;

FIG. 23 is an enlarged view taken at C of FIG. 22 in accordance with the present invention;

FIG. 24 is a schematic view of a square strap of the present invention;

FIG. 25 is a schematic view of the bail handle of the present invention;

FIG. 26 is a schematic view of the support frame, front wheel assembly and seat plate of the present invention;

FIG. 27 is an exploded view of the front wheel assembly of the present invention;

FIG. 28 is a schematic view of the front wheel, stud and collar of the present invention;

FIG. 29 is a schematic view of the front wheel assembly and lower joint of the present invention;

FIG. 30 is a schematic view of the present invention with a foot pedal;

FIG. 31 is a schematic structural view of the present invention with a rear wheel assembly;

FIG. 32 is a schematic view of the structure of the supporting device of the present invention;

FIG. 33 is a schematic structural view of the rear wheel assembly of the present invention;

FIG. 34 is an exploded view of a portion of the rear wheel assembly of the present invention;

FIG. 35 is a schematic view of the tightening mechanism of the present invention;

FIG. 36 is an exploded view of the tightening device of the present invention;

FIG. 37 is a view showing a state where the fixing lever of the present invention is not retracted;

fig. 38 is a state view showing the state where the fixing lever of the present invention is retracted.

The meaning of the individual reference symbols in the figures is:

1. a support frame;

2. a seat plate assembly; 20. a seat plate; 201. a base; 202. a first card hole; 21. a backrest; 211. a first bump; 22. a backrest adjustment device; 221. a backrest telescopic sleeve; 222. the front side is sleeved with a box; 223. a first return spring; 224. the backrest adjusting latch block; 225. the rear side is sleeved with the box; 226. a tooth clamping groove; 227. a backrest support bar; 228. a backrest adjustment button; 229. a resisting block;

3. a push rod assembly; 30. the push rod is communicated downwards; 301. a second card hole; 302. a torsion spring; 303. locking through the marble; 31. the push rod is communicated upwards; 311. a push-rod handle; 32. square hoop holding; 33. a hoop handle is held; 34. a stopper block;

4. a front wheel assembly; 40. a front wheel rolling device; 401. the front wheel is supported through; 402. a front wheel shock absorbing seat; 403. a front wheel; 404. a convex column; 405. a convex ring; 406. a clamp spring; 407. a damping spring; 41. pedaling; 411. a card holder; 412. fastening screws;

5. a folding assembly; 50. an upper joint; 501. a first groove; 5011. a card slot; 5012. a chute; 502. a fixed block; 503. a second groove; 5031. a through hole; 504. a second bump; 505. a third groove; 506. a semicircular cushion block; 51. the lower joint; 511. a shaft hole; 512. mounting grooves; 52. clamping the supporting device; 521. a button rubber cover; 522. a seat plate locking block; 523. a bevel; 524. a second return spring; 525. a seat plate button; 526. self-tapping screws; 53. a plug-in fixing device; 531. a bail button; 532. a wedge block; 533. a third return spring; 534. a needle is retracted; 535. a limiting ring; 536. a fourth return spring; 537. lifting a ring; 538. a bolt;

6. a rear wheel assembly; 60. a rear wheel rolling device; 601. the rear wheel is supported through; 602. fixing a column; 603. a limiting rubber block; 604. the rear wheel is folded into the upper joint; 605. a rear wheel; 606. fixing the rod; 607. the rear wheel closes the lower joint; 608. a support rail; 609. the rear wheel is connected with a rubber block; 61. a support device; 611. a connecting rod; 612. connecting a sleeve; 62. a tightening device; 621. the rear wheel closes the protective cover; 622. a folding button; 6221. a hollow column; 623. a protruding button; 624. a connecting rod sleeve; 625. inserting marbles; 626. a fifth return spring;

7. a protection device; 70. a support is communicated; 71. a support through sleeve; 72. a guardrail sleeve; 73. and (4) a guardrail.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth", "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth", "fifth" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1-38, the present invention provides a technical solution:

a folding handcart for children comprises a supporting frame 1, a seat board component 2 is arranged on the supporting frame 1, the seat board component 2 comprises a seat board 20 and a backrest 21, two bases 201 which are symmetrical to each other are arranged at the bottom of the seat board 20, the bases 201 and the seat board 20 are of an integrally formed structure, first clamping holes 202 which are rectangular in cross section and communicated with the outside are arranged in the bases 201, two first convex blocks 211 which are symmetrical to each other are integrally formed at the bottom of the backrest 21, a backrest adjusting device 22 is further arranged at the bottom of the backrest 21, the backrest adjusting device 22 comprises a backrest telescopic sleeve 221, a front side sleeving box 222 is arranged on the backrest telescopic sleeve 221, a rear side sleeving box 225 is arranged on the front side sleeving box 222, the front side sleeving box 222 and the rear side sleeving box 225 are rotatably connected through a rotating shaft, the rotating shaft penetrates through the rear side sleeving box 225 and the front side sleeving box 222 simultaneously, so that the rear side sleeving box 225 can be under the action of a certain external force when needed, the rear side splicing box 225 can be manually rotated by a certain angle;

a clamping tooth groove 226 is arranged on one adjacent side surface of the front side sleeving box 222 and the rear side sleeving box 225, a plurality of clamping teeth which are annularly arranged at equal intervals are arranged on the annular groove wall of the clamping tooth groove 226, a backrest adjusting clamping tooth block 224 is arranged between the front side sleeving box 222 and the rear side sleeving box 225, the clamping teeth on the backrest adjusting clamping tooth block 224 are in clamping fit with the gap between the two adjacent clamping teeth in the clamping tooth groove 226, a first return spring 223 is arranged between the backrest adjusting clamping tooth block 224 and the cavity wall of the front side sleeving box 222, one end of the first return spring 223 is tightly welded on the groove wall of the clamping tooth groove 226 in the front side sleeving box 222, the other end of the first return spring 223 is tightly welded on the backrest adjusting clamping tooth block 224, when the first return spring 223 is in a normal state, part of tooth bodies of the clamping teeth on the backrest adjusting clamping tooth block 224 is positioned at the gap between the two adjacent clamping teeth in the clamping tooth groove 226 in the front side sleeving box 222, part of tooth bodies of the remaining part of the latches of the backrest adjusting latch block 224 are positioned in a gap between two adjacent latches in a latch groove 226 in the front side sleeving box 222, and at the moment, the backrest adjusting latch block 224 limits and fixes the front side sleeving box 222 and the rear side sleeving box 225 to ensure that the front side sleeving box 222 and the rear side sleeving box 225 can not freely rotate;

a backrest support rod 227 is further arranged on the rear side sleeving box 225, the backrest support rod 227 is rotatably connected with the two first protrusions 211 through a rotating shaft, the backrest support rod 227 can rotate freely, and after the rotating angle of the backrest support rod 227 is adjusted, the supporting angle of the backrest 21 is changed, so that the angle of the backrest 21 is adjusted;

a backrest adjusting button 228 is further arranged on the rear side sleeving box 225, two symmetrical abutting blocks 229 are further integrally formed on the backrest adjusting button 228, the tail ends of the abutting blocks 229 are in a hook shape protruding towards the outer side, a through hole allowing the abutting blocks 229 to penetrate through is formed in the rear side sleeving box 225, the tail ends of the abutting blocks 229 penetrate through the through hole in the rear side sleeving box 225 and are located in the clamping tooth groove 226, and the hook-shaped protrusions at the tail ends of the abutting blocks 229 can be just clamped at the inner side hole openings of the through hole in the rear side sleeving box 225, so that the abutting blocks 229 cannot fall off the rear side sleeving box 225;

when the backrest adjusting button 228 is pressed towards the front side sleeving box 222, the backrest adjusting button 228 moves towards the front side sleeving box 222, the tail end of the abutting block 229 abuts against the backrest adjusting latch block 224 and pushes the backrest adjusting latch block 224 to move towards the front side sleeving box 222, the latch on the backrest adjusting latch block 224 can be separated from two adjacent latches in the latch groove 226 in the rear side sleeving box 225, at the moment, the backrest adjusting latch block 224 has no limit effect on the rear side sleeving box 225, the rear side sleeving box 225 can rotate freely, after the rotation is finished, the backrest adjusting button 228 is loosened, the backrest adjusting latch block 224 is driven to restore to the original state under the elastic force of the first return spring 223, part of the latch on the backrest adjusting latch block 224 is still located at the gap between two adjacent latches in the latch groove 226 in the front side sleeving box 222, and simultaneously, the part of the latch of the backrest adjusting latch block 224 is still located at the gap between two adjacent latches in the front side sleeving box 222 The gap between two adjacent latches in the groove 226 realizes the limitation of the front side splicing box 222 and the rear side splicing box 225, meanwhile, the backrest adjusting button 228 is restored under the elastic action of the first return spring 223, and a distance which can continuously extrude the backrest adjusting button 228 next time is still left between the backrest adjusting button 228 and the rear side splicing box 225.

One end of the support frame 1 is provided with a push rod assembly 3, the push rod assembly 3 comprises a push rod lower passage 30 and a push rod upper passage 31, the push rod lower passage 30 is of a hollow structure, the push rod upper passage 31 is inserted into a sliding groove in the push rod lower passage 30 and is in sliding connection with the sliding groove in the push rod lower passage 30, a rod body at one side of the end part of the push rod lower passage 30 far away from the push rod upper passage 31 is provided with a second clamping hole 301 communicated with the outside, a torsion spring 302 is further arranged in the sliding groove in the push rod lower passage 30, one end of the torsion spring 302 is tightly welded on the groove wall of the sliding groove in the push rod lower passage 30, the other end of the torsion spring 302 is provided with a locking marble 303, the locking marble 303 is in clamping fit with the second clamping hole 301, a convex ring at the tail end of the locking marble 303 is clamped at the inner side hole of the second clamping hole 301, when the, the torsion spring 302 can be deformed, and the lock-through marble 303 can move towards the inner side of the second card hole 301;

a push rod handle 311 is integrally formed at the tail end of the push rod upper channel 31, a square hoop handle 32 is further sleeved on the push rod lower channel 30, the square hoop handle 32 is fixedly installed on the push rod lower channel 30 through a plurality of socket nails, a hoop handle 33 is further rotatably connected to the square hoop handle 32 through a rotating shaft, a stop block 34 is further arranged between the hoop handle 33 and the square hoop handle 32, through holes through which the stop block 34 passes are formed in the push rod lower channel 30 and the hoop handle 33, the stop block 34 passes through the through holes in the push rod lower channel 30 and the through holes in the hoop handle 33 and can slide in the through holes, the tail end of the stop block 34 abuts against the outer surface of the push rod upper channel 31, irregular protrusions are arranged on the hoop handle 33, when the hoop handle 33 is rotated to 90 degrees in the forward direction, the protrusions on the hoop handle 33 can not abut against the stop block 34 any more, at the tail end of the stop block 34 can not abut against the push rod upper channel 31 any more, and the push rod upper channel 31 can extend along the length direction of the push rod lower channel 30, or, the push rod upper tube 31 can be continuously inserted into the sliding groove in the push rod lower tube 30, or the push rod upper tube 31 can be pulled out from the sliding groove in the push rod lower tube 30 for a certain length, when the hoop holding handle 33 is rotated reversely, the protrusion on the hoop holding handle 33 continuously abuts against the stop block 34, the tail end of the stop block 34 also abuts against the push rod upper tube 31, the push rod upper tube 31 is fixed, and the push rod upper tube 31 can not be pulled out outwards any more or can not be stored towards the push rod lower tube 30;

the other end of the support frame 1 is provided with a front wheel component 4, the front wheel component 4 comprises a front wheel rolling device 40 arranged at the end part of the support frame 1 and a pedal 41 arranged on the support frame 1, the front wheel rolling device 40 comprises a front wheel support channel 401 tightly welded on the end part of the support frame 1 in a horizontal shape, two front wheel shock absorbing seats 402 which are symmetrical with each other are arranged on the front wheel support channel 401, the front wheel support channel 401 is in plug fit with the front wheel shock absorbing seat 402 and is fixed by a socket nail, a front wheel 403 is arranged on the front wheel shock absorbing seat 402, a convex column 404 is tightly welded on a fixing frame of the front wheel 403, the top end of the convex column 404 passes through the front wheel shock absorbing seat 402 and is tightly welded with a convex ring 405, a clamp spring 406 is also wound on the convex column 404, the clamp spring 406 is positioned below the convex ring 405 and tightly abutted against the top surface of the front wheel shock absorbing seat 402, a damping spring 407 is also wound on the convex column 404, one end of a damping spring 407 is tightly welded on the convex column 404, the other end of the damping spring 407 is tightly welded on the inner wall of the front wheel shock absorption seat 402, two clamping seats 411 which are symmetrical to each other and have a U-shaped cross section are arranged on the pedal 41, the two clamping seats 411 are sleeved on the support frame 1 and can slide on the support frame 1, the two clamping seats 411 are fixed through a fastening screw 412, after the fastening screw 412 is screwed down, the two clamping seats 411 are attached to the support frame 1 more tightly to fix the clamping seats 411, and it is ensured that the clamping seats 411 are not easy to slide on the support frame 1 after the fastening screw 412 is not screwed down;

the push rod lower passage 30 is also provided with a protection device 7, the protection device 7 comprises a support passage 70 tightly welded on the push rod lower passage 30, two end parts of the support passage 70 are both fixedly provided with support passage sleeves 71 through nest nails, the support passage sleeves 71 are fixedly provided with guardrail sleeves 72 through nest nails, and a guardrail 73 is arranged between the two guardrail sleeves 72, so that children can be protected and prevented from falling off the seat plate 20;

the support frame 1 is also provided with a folding component 5, the folding component 5 comprises an upper joint 50 and a lower joint 51, the support frame 1 is matched with a sliding groove in the lower joint 51 in an inserting way and is fixed by using a socket nail, the seat plate 20 is rotatably connected with the upper joint 50 through a bolt, the push rod lower channel 30 is fixedly connected with the upper joint 50 through the socket nail, the bottom end of the backrest 21 is also rotatably connected with the upper joint 50 through a rotating shaft, the upper joint 50 is internally provided with a first groove 501 communicated with the outside, the left and right side groove walls of the first groove 501 are respectively provided with a clamping groove 5011 communicated with the outside, when the seat plate 20 is vertically placed, the position of the first clamping hole 202 corresponds to the position of the clamping groove 5011, the left and right side groove walls of the first groove 501 close to the position of the notch are respectively provided with a sliding groove 5012, the groove walls of the first groove 501 close to the position of the notch are also integrally formed with a fixing block 502, the fixing block 502 is internally provided with a second, a through hole 5031 communicated with the outside is formed in the groove wall on the front side of the second groove 503, second convex blocks 504 are arranged on the left side and the right side of the upper joint 50, third grooves 505 are formed in the second convex blocks 504, semicircular cushion blocks 506 are fixedly mounted in the third grooves 505 through socket nails, a complete through hole is formed between each semicircular cushion block 506 and the groove wall of each third groove 505, an installation groove 512 communicated with the outside is formed in the lower joint 51, the fixed block 502 is located in the installation groove 512, shaft holes 511 communicated with the outside are formed in the fixed block 502 and the groove walls of the installation groove 512, each shaft hole 511 is located at a position, close to the bottom end of the fixed block 502, and the fixed block 502 is rotatably connected with the groove wall of the installation groove 512 through a rotating shaft, so that the upper joint 50 and the lower joint 51 can rotate around the rotating position;

the clamping support device 52 is arranged in the first groove 501, the clamping support device 52 comprises a button rubber cover 521 fixedly installed on the groove wall of the first groove 501, two seat plate locking blocks 522 which are symmetrical to each other are arranged above the button rubber cover 521, inclined planes 523 are arranged on the seat plate locking blocks 522, the clamping ends of the seat plate locking blocks 522 penetrate through the clamping grooves 5011 and are in clamping fit with the clamping grooves 5011, when the seat plate 20 is vertically placed, as the positions of the first clamping holes 202 correspond to the positions of the clamping grooves 5011, the clamping ends of the seat plate locking blocks 522 can be clamped into the first clamping holes 202, the seat plate 20 is limited and fixed, the seat plate 20 is ensured to be kept in a horizontal placing state all the time, and children can take the seat plate conveniently;

a second return spring 524 is tightly welded between the two seat plate locking blocks 522, two ends of the second return spring 524 are respectively tightly welded on the two seat plate locking blocks 522, a seat plate button 525 is further arranged at the front side of the two seat plate locking blocks 522, the seat plate button 525 abuts against the inclined plane 523 along the tail ends of the two plate bodies in the length direction of the button rubber cover 521, when the seat plate button 525 is pushed towards the seat plate locking block 522, the two plate bodies of the seat plate button 525 move forwards along the inclined plane 523, because the distance between the end parts of the two inclined planes 523 close to the seat plate button 525 is smaller than that between the end parts far away from the seat plate button 525, the seat plate button 525 can extrude the two seat plate locking blocks 522 towards the middle position, so that the clamping end of the seat plate locking block 522 can move a certain distance towards the clamping slot 5011, the clamping end of the seat plate locking block 522 is separated from the first clamping hole 202, at this time, the seat board 20 can be rotated to fold and store the seat board 20; still threaded connection is used for supporting on the cell wall of its notch position of first recess 501 and comes to carry out spacing self tapping screw 526 to bedplate button 525 on bedplate button 525 front side, and the terminal protruding cap of self tapping screw 526 is located bedplate button 525's front side, and is spacing bedplate button 525, guarantees that bedplate button 525 can keep in contact with inclined plane 523 all the time along two plate body ends of button gum cover 521 length direction, avoids bedplate button 525 to drop from first recess 501.

In this embodiment, bedplate locking piece 522 and bedplate button 525 are located between the roof of button gluey lid 521 and first recess 501, the bottom plate that utilizes the roof of first recess 501 and button gluey lid 521 supports bedplate locking piece 522 and bedplate button 525, guarantee that bedplate locking piece 522 and bedplate button 525 can not drop, bedplate locking piece 522 and bedplate button 525 can slide in the clearance department between the roof of first recess 501 and the bottom plate of button gluey lid 521 simultaneously, guarantee can artificial extrusion bedplate button 525.

The lower joint 51 is further provided with an inserting and fixing device 53, the inserting and fixing device 53 comprises a lifting ring button 531 arranged in the second groove 503, a wedge block 532 is integrally formed at the bottom end of the lifting ring button 531, a third return spring 533 is further wound on the lifting ring button 531, one end of the third return spring 533 is fixedly arranged on the lifting ring button 531, the other end of the third return spring 533 is fixedly arranged on the groove wall of the second groove 503, a telescopic needle 534 is arranged on the front side of the lifting ring button 531, a limit ring 535 is arranged on the telescopic needle 534, the tail end of the telescopic needle 534 passes through a through hole 5031 and is positioned in the mounting groove 512, the limit ring 535 abuts against a front side hole of the through hole 5031 far away from the lower joint 51, a fourth return spring 536 is wound on the telescopic needle 534, one end of the fourth return spring 536 is fixedly arranged on the groove wall of the second groove 503, the other end of the fourth return spring 536 is fixedly arranged on the telescopic needle 534, when the third return spring 533 is in a normal state, the inclined plane of the wedge block 532 abuts against the inclined plane at the end of the retractable needle 534, and the retractable needle 534 is abutted against the direction of the mounting groove 512, so that the end of the retractable needle 534 passes through the through hole 5031 and is stably inserted into the mounting groove 512, at this time, the fourth return spring 536 is in a compressed state, and since the retractable needle 534 is inserted into the mounting groove 512 from the through hole 5031, part of the column body of the retractable needle 534 is located in the second groove 503, and the remaining part of the column body of the retractable needle 534 is located in the mounting groove 512, thereby fixing the lower joint 51 and the upper joint 50, at this time, the lower joint 51 and the upper joint 50 cannot rotate, the lift ring button 531 is further provided with a lift ring 537, the lift ring 537 is provided with a latch 538, the lift ring button 531 is provided with a through hole for the latch 538 to pass through, and the latch 538 can rotate in the through hole in the lift ring button 531, the latch 538 further passes through the two sliding slots 5012 and can slide in the sliding slot 5012, when the lower joint 51 and the upper joint 50 are folded, the lift ring 537 is pulled towards the sliding slot 5012, the lift ring 537 moves towards the sliding slot 5012 to drive the lift ring button 531 to move towards the sliding slot 5012, at this time, the wedge 532 also starts to move towards the sliding slot 5012, the acting force of the wedge 532 against the retractable needle 534 becomes smaller and smaller, and the fourth return spring 536 needs to restore to the original shape, and pushes the retractable needle 534 towards the second groove 503, so that the tip of the retractable needle 534 moves from the mounting slot 512 to the position of the through hole 5031, at this time, the tip of the retractable needle 534 is not located in the mounting slot 512, and does not play a role in limiting the lower joint 51 any more, at this time, the lower joint 51 and the upper joint 50 can rotate to realize folding, and when the lower joint 51 and the upper joint 50 are unfolded, repeating the operation of pulling the lifting ring 537 to ensure that the end of the telescopic needle 534 is located at the through hole 5031, rotating the lower joint 51 until the included angle between the lower joint 51 and the upper joint 50 is 180 degrees, and finally loosening the lifting ring 537, at this time, the acting force of the third return spring 533 returning to the original state is greater than the acting force of the fourth return spring 536 returning to the original state, and the lifting ring button 531 is driven to continue to move in the opposite direction of the chute 5012, at this time, the acting force of the wedge-shaped block 532 on the telescopic needle 534 is larger and larger, and the telescopic needle 534 is squeezed to move the telescopic needle 534 in the direction of the mounting groove 512, at this time, part of the column body of the telescopic needle 534 is still inserted into the mounting groove 512 along the through hole 5031, so that the lower joint 51 and the upper joint 50 are limited, and the lower joint 51 and the upper joint 50 can not rotate any more;

the supporting frame 1 is also provided with a rear wheel assembly 6, the rear wheel assembly 6 is composed of a rear wheel rolling device 60, a supporting device 61 and a tightening device 62, the rear wheel rolling device 60 comprises two rear wheel upper supporting through holes 601 which are symmetrical to each other, one end part of each of the two rear wheel upper supporting through holes 601 is tightly welded with a fixing column 602, the fixing column 602 just passes through a complete through hole formed between a semicircular cushion block 506 and the groove wall of a third groove 505, a limit rubber block 603 is arranged on the fixing column 602, the limit rubber block 603 is positioned between two second convex blocks 504, the limit rubber block 603 is abutted against the groove wall of the third groove 505 to fix the rear wheel upper supporting through holes 601, the other end parts of the two rear wheel upper supporting through holes 601 are respectively provided with a rear wheel folding upper joint 604, the rear wheel folding upper joint 604 is provided with a rear wheel 605, the rear wheel 605 is provided with a fixing rod 606, the end part of the fixing rod 606 close to the rear wheel folding upper, the rear wheel folding lower joint 607 is rotatably connected with the rear wheel folding upper joint 604 through a rotating shaft, so that the two fixing rods 606 can be folded towards the middle position when needed;

a supporting cross rod 608 is arranged on one side surface adjacent to the two fixing rods 606, the end parts of the two supporting cross rods 608 close to each other are connected through a rear wheel connecting rubber block 609, and the supporting cross rods 608 are rotatably connected with the rear wheel connecting rubber block 609 through a rotating shaft, so that the two fixing rods 606 can be further guaranteed to be folded towards the middle position;

the supporting device 61 comprises a connecting rod 611, one end of the connecting rod 611 is sleeved with a connecting sleeve 612, the connecting rod 611 and the connecting sleeve 612 are respectively provided with an axle hole communicated with the outside, the connecting rod 611 and the connecting sleeve 612 are respectively rotatably connected with the lower joint 51 through a rotating shaft, the tightening device 62 comprises a rear wheel folding protective cover 621 sleeved on the other end of the connecting rod 611, a folding button 622 is arranged inside the rear wheel folding protective cover 621, a through hole communicated with the outside is arranged at the top of the rear wheel folding protective cover 621, a protruding button 623 penetrating through the through hole at the top of the rear wheel folding protective cover 621 is arranged at the top end of the folding button 622, a hollow column 6221 is integrally formed at the bottom of the folding button 622, a connecting rod sleeve 624 is fixedly arranged in the folding button 622, the connecting rod sleeve 624 is sleeved on the connecting rod 611, a lifting lug at the tail end of the connecting rod sleeve 624 outside the rear wheel folding protective cover 621 is rotatably, the hollow column 6221 is further provided inside with an insertion marble 625 penetrating through the connecting rod sleeve 624, the insertion marble 625 is wound with a fifth return spring 626, one end of the fifth return spring 626 is tightly welded on the insertion marble 625, the other end of the fifth return spring 626 is tightly welded on the connecting rod sleeve 624, the connecting rod 611 is provided with a plurality of clamping holes for limiting, the position of each clamping hole in the connecting rod 611 corresponds to the position of the insertion marble 625, the connecting rod sleeve 624 is provided with a through hole for the insertion marble 625 to penetrate through, the top end of the insertion marble 625 penetrates through the through hole in the connecting rod sleeve 624 and then is in insertion fit with the corresponding clamping hole in the connecting rod 611, and the position of the rear wheel folding protection cover 621 on the connecting rod 611 is limited.

Specifically, when the fifth return spring 626 is in a normal state, the protruding disc at the end of the insertion marble 625 abuts against the bottom end of the hollow column 6221, and the top end of the insertion marble 625 normally passes through the through hole in the connecting rod sleeve 624 and is inserted into the corresponding clamping hole in the connecting rod 611, when the protruding button 623 is pressed downward, the protruding button 623 moves downward to drive the retracting button 622 to move downward, the retracting button 622 moves downward to drive the protruding disc at the end of the insertion marble 625 to move downward, further drive the insertion marble 625 to move downward, at this time, the top end of the insertion marble 625 separates from the corresponding clamping hole in the connecting rod 611, at this time, the whole tightening device 62 can slide on the connecting rod 611, and in the sliding process of the tightening device 62, the rear wheel connection rubber block 609 can be driven to synchronously move, the rear wheel connection rubber block 609 can drive the two support cross bars 608 to move toward the direction of the limit rubber block 603, the two fixing rods 606 are further driven to be folded towards the middle position, after the folding is finished, the protruding button 623 is released, at the moment, the fifth reset spring 626 can restore to the original state, the folding button 622 is further driven to restore to the original state, meanwhile, the inserting marble 625 is also driven to restore to the original state, the top end of the inserting marble 625 normally penetrates through the through hole in the connecting rod sleeve 624 and is inserted into the corresponding clamping hole in the connecting rod 611, the position of the rear wheel folding protection cover 621 on the connecting rod 611 is limited, it is guaranteed that the rear wheel folding protection cover 621 cannot easily move, and it is further guaranteed that the folded fixing rods 606 cannot easily open.

When the foldable stroller for children of the present invention is used, the lifting ring 537 is pulled in the direction of the sliding slot 5012, the lifting ring 537 moves in the length direction of the sliding slot 5012 to drive the lifting ring button 531 to move in the direction of the sliding slot 5012, at this time, the wedge 532 also starts to move in the direction of the sliding slot 5012, the acting force of the wedge 532 against the retractable needle 534 becomes smaller and smaller, and the fourth return spring 536 needs to restore to the original state, and will push the retractable needle 534 in the direction of the second groove 503, so that the end of the retractable needle 534 moves from the mounting groove 512 to the position of the through hole 5031, at this time, the end of the retractable needle 534 is not located in the mounting groove 512, and the lower joint 51 is no longer limited, at this time, the lower joint 51 and the upper joint 50 can be rotated only through the connection between the lower joint 51 and the upper joint 50, so as to fold the lower joint 51 and the upper joint 50, when the lower joint 51 and the upper joint 50 are unfolded, repeating the above operation of pulling the lifting ring 537 to ensure that the end of the retractable needle 534 is located at the through hole 5031, then rotating the lower joint 51 until the included angle between the lower joint 51 and the upper joint 50 is 180 degrees, and finally loosening the lifting ring 537, at this time, the acting force of the third return spring 533 returning to the original state is greater than the acting force of the fourth return spring 536 returning to the original state, and will drive the lifting ring button 531 to continue to move toward the opposite direction of the chute 5012, at this time, the acting force of the wedge-shaped block 532 against the retractable needle 534 becomes greater, and will press the retractable needle 534 to move the retractable needle 534 toward the mounting groove 512, at this time, part of the column of the retractable needle 534 is still inserted into the mounting groove 512 along the through hole 5031, thereby realizing the limit of the lower joint 51 and the upper joint 50, ensuring that the lower joint 51 and the upper joint 50 can not rotate any more, and solving the problem that the common child stroller can not be folded when in use, causing the problem that the utility model occupies a large space and brings inconvenience to the trip with the utility model.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A folding pushchair for children, comprising a support frame (1), characterized in that: a seat plate assembly (2) is arranged on the support frame (1), a push rod assembly (3) is arranged at one tail end of the support frame (1), and a front wheel assembly (4) is arranged at the other tail end of the support frame (1);

the seat plate assembly (2) comprises a seat plate (20) and a backrest (21), two bases (201) which are symmetrical to each other are arranged at the bottom of the seat plate (20), first clamping holes (202) which are rectangular in cross section and communicated with the outside are formed in the bases (201), two first convex blocks (211) which are symmetrical to each other are arranged at the bottom of the backrest (21), and a backrest adjusting device (22) is further arranged at the bottom of the backrest (21);

the push rod assembly (3) comprises a push rod lower through (30) and a push rod upper through (31);

the front wheel assembly (4) comprises a front wheel rolling device (40) arranged at the end part of the support frame (1) and pedals (41) arranged on the support frame (1).

2. A child folding stroller according to claim 1, wherein: backrest adjusting device (22) are including back telescope tube (221), be equipped with front side box (222) on back telescope tube (221), be equipped with rear side box (225) on front side box (222), front side box (222) with rotate through the pivot between rear side box (225) and connect, all be equipped with draw-in groove (226) on front side box (222) and the adjacent side of rear side box (225).

3. A child folding stroller according to claim 2, wherein: a backrest adjusting latch block (224) is arranged between the front side splicing box (222) and the rear side splicing box (225), latches on the backrest adjusting latch block (224) are in clamping fit with two adjacent latches in the latch groove (226), a first reset spring (223) is arranged between the backrest adjusting latch block (224) and the cavity wall of the front side splicing box (222), one end of the first reset spring (223) is fixedly installed on the groove wall of the latch groove (226) in the front side splicing box (222), the other end of the first reset spring (223) is fixedly installed on the backrest adjusting latch block (224), a backrest support rod (227) is further arranged on the rear side splicing box (225), the backrest support rod (227) is rotatably connected with the two first convex blocks (211) through a rotating shaft, and a backrest adjusting button (228) is further arranged on the rear side splicing box (225), two symmetrical abutting blocks (229) are further arranged on the backrest adjusting button (228), and the tail ends of the abutting blocks (229) penetrate through the rear side sleeving box (225) and are located in the clamping tooth grooves (226).

4. A child folding stroller according to claim 1, wherein: lead to on the push rod (31) insert under the push rod lead to in the spout in (30) and with the push rod lead to under between the spout in (30) sliding connection, the push rod leads to under (30) keep away from the push rod on the tip body of rod of (31) be equipped with external second card hole (301) that are linked together, still be equipped with torsion spring (302) in the spout in (30) down the push rod, the one end fixed mounting of torsion spring (302) is on the cell wall of the spout in (30) is led to under the push rod, the other one end of torsion spring (302) is equipped with lock logical marble (303), lock logical marble (303) with joint cooperation between second card hole (301), lock logical marble (303) terminal bulge loop card is in the inboard drill way department of second card hole (301).

5. The child folding stroller of claim 4, wherein: the end that leads to (31) on the push rod is equipped with push rod handle (311), it is equipped with square hoop (32) of taking still to overlap on leading to (30) under the push rod, square hoop (32) of taking is on leading to (30) under the push rod through a plurality of nest nail fixed mounting, square hoop handle (33) of taking still to be connected with through the pivot rotation on hoop (32), take hoop handle (33) with square hoop handle (32) of taking still is equipped with stop block (34) between, stop block (34) pass through under the push rod (30) and take hoop handle (33), and the terminal butt of stop block (34) is equipped with anomalous arch on the surface of leading to (31) on the push rod on taking hoop handle (33).

6. A child folding stroller according to claim 1, wherein: the front wheel rolling device (40) comprises a front wheel support tube (401) which is horizontally and tightly welded on the end part of the support frame (1), two front wheel shock absorbing seats (402) which are symmetrical to each other are arranged on the front wheel support tube (401), the front wheel support tube (401) is in plug-in fit with the front wheel shock absorbing seats (402) and is fixed by using socket nails, a front wheel (403) is arranged on the front wheel shock absorbing seat (402), a convex column (404) is arranged on the front wheel (403), the top end of the convex column (404) penetrates through the front wheel shock absorbing seats (402) and is provided with a convex ring (405), a clamp spring (406) is further wound on the convex column (404), the clamp spring (406) is positioned below the convex ring (405) and is propped against the top surface of the front wheel shock absorbing seats (402), a damping spring (407) is further wound on the convex column (404), one end of the damping spring (407) is fixedly installed on the convex column (404), the other end of the damping spring (407) is fixedly mounted on the inner wall of the front wheel shock absorbing seat (402), two symmetrical clamping seats (411) are arranged on the pedal (41), the two clamping seats (411) are sleeved on the support frame (1) and can slide on the support frame (1), and the two clamping seats (411) are fixed through fastening screws (412).

7. The child folding stroller of claim 5, wherein: still be equipped with protection device (7) on push rod lower tube (30), protection device (7) lead to (70) including the support of the close welding on push rod lower tube (30), the both ends that support lead to (70) all are equipped with support and lead to sleeve (71), support and lead to and be equipped with guardrail sleeve (72) on sleeve (71), two be equipped with guardrail (73) between guardrail sleeve (72).

8. A child folding stroller according to claim 1, wherein: the folding rack is characterized by further comprising a folding assembly (5), wherein the folding assembly (5) is arranged on the supporting rack (1), and the folding assembly (5) comprises an upper joint (50) and a lower joint (51).

9. A child folding stroller according to claim 1, wherein: the rear wheel assembly (6) is arranged on the support frame (1), and the rear wheel assembly (6) is composed of a rear wheel rolling device (60), a supporting device (61) and a tightening device (62).