CN215322805U

CN215322805U - folding cart

Info

Publication number: CN215322805U
Application number: CN202120672366.9U
Authority: CN
Inventors: 马福生; 张阳
Original assignee: Goodbaby Child Products Co Ltd
Current assignee: Goodbaby Child Products Co Ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-12-28
Anticipated expiration: 2031-04-01

Abstract

The utility model discloses a folding cart, which comprises a frame in an unfolding state and a folding state and a seat frame arranged on the frame, wherein the seat frame comprises a seat and a backrest, the lower part of the backrest can rotate relatively and can be arranged on the seat in a relatively sliding manner along the length extension direction of the seat, the frame is at least provided with a first rod frame and a second rod frame, the rear part of the seat is rotatably connected to the first rod frame, the seat can slide relatively and can be rotatably connected to the second rod frame along the front-back direction, in the process of converting the unfolding state of the frame to the folding state, the first rod frame and the second rod frame rotate and are folded, and the backrest and the seat are folded mutually and are folded together with the frame. The utility model has the following advantages: 1. when the frame is folded, the seat frame can be linked to fold, so that the operation is simple and convenient; 2. the folding volume of the whole vehicle is small; 3. the backrest can be integrally arranged, the structure is simple, and the supporting strength is ensured.

Description

Folding cart

Technical Field

The utility model relates to the field of children products, in particular to a folding cart.

Background

The folding mode of the seat of the existing foldable cart is a difficult point, and the seat is required to be detached when some carts are folded, so that the operation is complex; some shallow are in order to reduce the volume after the frame is folded, can be for upper and lower sectional type with the back design of seat, and back body and head rest two parts are connected through the pivot, and the back of design makes the structure of seat complicated on the one hand, has increased manufacturing cost and be not convenient for use, and on the other hand has reduced the support intensity of back, and the defect is obvious.

Disclosure of Invention

The utility model aims to provide a folding cart with simple seat folding mode and small folding volume.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a folding shallow, is in including frame, the setting that has expansion state and fold condition seat frame on the frame, seat frame includes seat and back, the lower part of back can enough relative rotation can be followed the length extending direction of seat sets up with sliding relatively on the seat, the frame has first rack and second rack at least, the rear portion of seat is connected with rotating on the first rack, the seat can enough be connected with rotating relatively along fore-and-aft direction relative slip again on the second rack, the frame is by the in-process that expansion state switched to fold condition, first rack with the second rack rotation draws in, just the back with the seat draw in each other and with the frame draws in together.

Preferably, a backrest installation seat is rotatably arranged at the lower part of the backrest, the backrest installation seat is arranged on the seat in a relatively sliding manner along the front-back direction, and the frame is provided with a driving mechanism for driving the backrest installation seat to slide relative to the seat in the process of switching the frame between the unfolding state and the folding state.

Further preferably, the seat has a seating surface, the backrest has a backrest surface and a back side surface respectively arranged on two sides different from each other in the thickness direction of the backrest, when the frame is in the unfolded state, the back side faces backwards, and the backrest is arranged at the rear part of the seat; when the frame is in a folded state, the back side surface and the sitting surface are folded relatively, and the backrest installation seat is positioned at the front part of the seat.

Further preferably, the driving mechanism includes a driving rod, one end of the driving rod is rotatably connected to the backrest mounting seat, the other end of the driving rod is rotatably connected to the second rod frame, and the other end of the driving rod moves away from the rear portion of the seat in the process of converting from the unfolded state to the folded state.

Still further preferably, a rear portion of the seat is rotatably connected to the first bar frame about a first rotation center line, the seat is relatively slidably connected to the second bar frame about a second rotation center line, the second rotation center line and the first rotation center line are parallel to each other and located in front of the first rotation center line, the other end portion of the driving lever is rotatably connected to the second bar frame about a third rotation center line, the third rotation center line and the second rotation center line are parallel to each other or extend in a collinear manner, and the third rotation center line and the second rotation center line both move away from the first rotation center line in the front-rear direction during the transition from the unfolded state to the folded state of the vehicle frame.

Further preferably, be provided with the bracing piece that extends along left right direction on the second bar frame, the seat include the bedplate, set firmly in the guide bar of bedplate bottom, the guide bar with form the guide way that extends along the fore-and-aft direction between the bedplate, the bracing piece can enough rotate relatively and insert along fore-and-aft direction sliding fit ground and establish in the guide way, just the bracing piece supports the below of bedplate.

Preferably, the frame includes a front bracket, a rear bracket, and a handle frame each extending in an up-down direction, two of an upper portion of the front bracket, an upper portion of the rear bracket, and a lower portion of the handle frame are rotatably connected and a third one is rotatably connected to one of the two, or the three of the upper portion of the front bracket, the upper portion of the rear bracket, and the lower portion of the handle frame are rotatably connected to each other, and one of the front bracket, the rear bracket, and the handle frame constitutes the second bar frame.

Further preferably, the frame further includes a push rod frame and a rear support frame which extend along the up-down direction respectively, and a connecting rod assembly arranged between the front support frame and the rear support frame, the upper part of the armrest frame is rotatably connected to the push rod frame, the rear support frame is rotatably connected to the rear support frame, the lower part of the push rod frame is rotatably connected to the upper part of the rear support frame, the connecting rod assembly includes a front connecting rod and a rear connecting rod, the front part of the front connecting rod is rotatably connected to the front support frame, the rear part of the rear connecting rod is rotatably connected to the rear support frame, the rear part of the front connecting rod is rotatably connected to the front part of the rear connecting rod, the lower part of the rear support frame can be relatively rotated and relatively slidably connected to the rear connecting rod, and the rear support frame constitutes the first frame.

Still more preferably, one of the upper portion of the front frame, the upper portion of the rear frame and the lower portion of the armrest frame is provided with a support rod which is connected to the seat so as to be capable of rotating relative to each other and sliding relative to each other in the front-rear direction, and the rear portion of the seat is rotatably connected to the rear stay.

Still further preferably, the lower part of the armrest frame is rotatably connected with the upper part of the rear support, the support rod is arranged on the upper part of the rear support or the lower part of the armrest frame, and when the frame is in a folded state, the seat and the backrest are mutually closed and mutually folded with the rear support and the rear support frame.

Due to the application of the technical scheme, when the frame is folded, the first rod frame and the second rod frame rotate to be folded, and the linkage backrest and the seat are folded together and are folded together with the frame. Compared with the prior art, the utility model has at least the following advantages: 1. when the frame is folded, the seat frame can be linked to fold, the seat frame does not need to be operated independently, and the operation is simple and convenient; 2. in a folded state, the backrest and the seat are mutually attached and are folded together with the frame, so that the whole folding vehicle is small in folding volume and convenient to carry and store; 3. the backrest can be integrally arranged, the structure is simple, and the supporting strength is ensured.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a folded stroller in an unfolded state in accordance with an embodiment of the present invention;

FIG. 2 is a side schematic view of the folding cart of FIG. 1;

FIG. 3 is a schematic perspective view of the folding cart of FIG. 1 at another angle;

FIG. 4 is an exploded perspective view of the seat frame and a portion of the frame in this embodiment;

FIG. 5 is a schematic perspective view of the seat frame and a portion of the frame during folding in the present embodiment;

FIG. 6 is a schematic top view of FIG. 5;

FIG. 7 is a schematic perspective view of the seat frame and a portion of the frame during further folding in this embodiment;

FIG. 8 is a perspective view of the seat frame and a portion of the frame in this embodiment in a folded state;

FIG. 9 is an exploded perspective view of the footrest and a portion of the frame in this embodiment;

FIG. 10 is a perspective view of the footrest and a portion of the frame in this embodiment in an expanded state;

FIG. 11 is an enlarged view of the point A in FIG. 10;

FIG. 12 is a perspective view of the foldable step frame and a part of the bicycle frame;

FIG. 13 is a perspective view of the foldable footrest and partial frame of the present embodiment;

fig. 14 is a perspective view of the folding cart in this embodiment during folding;

FIG. 15 is a side schematic view of the folding cart of FIG. 14;

FIG. 16 is a perspective view of the folding cart of this embodiment in a folded position;

FIG. 17 is a side schematic view of the folding cart of FIG. 16;

wherein: 100. a seat frame; 110. a seat; 110a, a sitting surface; 120. a backrest; 120a, a backrest surface; 120b, a back side; 130. a leg rest; 200. a foot rest; 210. an accommodating groove; 220. a pedal connecting portion; 310. a front bracket; 311. a front support rod; 320. a rear bracket; 321. a rear support rod; 3211. a rear strut joint; 410. a handrail frame; 411. a support bar; 4111. a drive rod joint; 412. a grab rail; 420. a push rod frame; 430. a rear support frame; 431. a rear upper stay bar; 432. a rear cross bar; 433. a rear lower stay bar; 600. a drive rod; 700. a connecting rod assembly; 710. a front link; 711. a main body rod portion; 712. a driving lever portion; 720. a rear connecting rod; 730. a slider;

11. a seat plate; 12. a guide bar; 2. a backrest mounting seat; 21. an upper mounting seat; 211. a pin shaft; 22. a lower mounting seat; 23. a chute; 3. a front wheel assembly; 31. a front wheel joint; 32. a front wheel body; 4. a rear wheel assembly; 41. a rear wheel joint; 42. a rear wheel body; 51. connecting the convex columns; 52. a first guide groove; 61. a linkage rod; 62. a second guide groove; 63. a connecting member; 64. a limiting member;

x, a first rotation center line; y, a second rotation center line; z, a third rotation center line; p, a fourth rotation center line; q, a fifth rotation center line; r, a sixth rotation center line; s, a front strut axis.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the utility model may be more readily understood by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "left-right direction", "height direction", "front-back direction", etc. indicate the orientation or positional relationship observed by the child when the child is normally seated on the folding stroller based on fig. 1, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, only have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.

Referring to fig. 1 to 3, a folding cart includes a frame having an unfolded state and a folded state, and a wheel assembly provided at a bottom of the frame. In the unfolded state, the frame includes a front bracket 310, a rear bracket 320, an armrest frame 410, a push rod frame 420, and a rear support frame 430, each extending in the up-down direction.

Among them, two of the upper portion of the front bracket 310, the upper portion of the rear bracket 320, and the lower portion of the armrest frame 410 are rotatably connected, and the third one is rotatably connected to one of the above two, or the upper portion of the front bracket 310, the upper portion of the rear bracket 320, and the lower portion of the armrest frame 410 are rotatably connected to each other.

In this embodiment, the front bracket 310 has two front struts 311 respectively disposed on the left and right sides and extending in the up-down direction, the rear bracket 320 has two rear struts 321 respectively disposed on the left and right sides and extending in the up-down direction, a rear strut connector 3211 is fixedly disposed at the upper end of each rear strut 321, the front strut 311 on each side is rotatably connected to the rear strut connector 3211 around a rotation line c, and the rotation line c extends in the left-right direction of the vehicle frame.

Referring to fig. 4, the handle frame 410 has two handle bars 412 disposed on the left and right sides, respectively, and each extending in the up-down direction, and a support bar 411 connected between the lower ends of the handle bars 412 on both sides. The upper portion of the rest bar 412 is rotatably connected to the push rod frame 420 around a rotation line a, and the support rod 411 is rotatably connected between the two rear rod joints 3211 around a second rotation center line Y (i.e., the axis line of the support rod 411 itself).

The rear support frame 430 has two rear upper stays 431 and two rear lower stays 433 which are respectively disposed on the left and right sides and extend in the up-down direction, and a rear cross bar 432 which extends in the left-right direction, the rear upper stays 431 extend upward from both left and right end portions of the rear cross bar 432, the rear lower stays 433 extend downward from the rear cross bar 432, and in the left-right direction of the rear cross bar 432, the two rear lower stays 433 are located inside the two rear upper stays 431, and the members of the rear support frame 430 are fixed to each other. The upper end part of the rear upper stay 431 is rotatably connected with the lower end part of the push rod frame 420 around a rotation line b, the rotation line b is parallel to the rotation line a, and the rotation line b is positioned below the rotation line a; two rear upper stays 431 are located inside the two grab bars 412 in the right-left direction of the frame. Referring to fig. 3, the rear lower stays 433 on each side are pivotally connected to the rear stays 321 about a pivot line j, and the two rear lower stays 433 are located inside the two rear stays 321 in the right-left direction of the vehicle frame.

Referring to fig. 1 to 3 and 9, the vehicle frame further includes a link assembly 700 disposed between the front bracket 310 and the rear bracket 320, the link assembly 700 has two sets disposed at left and right sides, each set of link assembly 700 includes a front link 710 and a rear link 720 extending in a front-rear direction, respectively, wherein the front link 710 has a main body rod portion 711, and a driving rod portion 712 extending from a front end of the main body rod portion 711 to be bent downward and rearward. Specifically, the front portion of the front link 710 is rotatably connected to the front bar 311 about a fifth rotation center line Q, the rear end portion of the front link 710 is rotatably connected to the front end portion of the rear link 720 about a rotation line d, and the rear portion of the rear link 720 is rotatably connected to the rear bar 321 about a rotation line f, which is located below the rotation line j in the length direction of the rear bar 321. In addition, the lower portion of the rear support frame 430 is connected to the rear link 720 to be relatively rotatable and relatively slidable, and specifically, the rear support rod 321 is provided with a slider 730 slidable in the longitudinal direction of the rear support rod 321, and the lower end portion of the rear lower support rod 433 is rotatably connected to the slider 730 around a rotation line e.

In this embodiment, the wheel assembly includes two front wheel assemblies 3 respectively disposed at the bottoms of the two front struts 311, and two rear wheel assemblies 4 respectively disposed at the bottoms of the two rear struts 321. The front wheel assembly 3 comprises a front wheel joint 31 and a front wheel body 32, and the front wheel joint 31 is arranged at the bottom of the front support rod 311 in a manner of relative rotation around the axis S of the front support rod 311; similarly, the rear wheel assembly 4 includes a rear wheel joint 41 and a rear wheel body 42, and the rear wheel joint 41 is provided at the bottom of the rear support rod 321 so as to rotate relatively around the axis of the rear support rod 321. Referring to fig. 6 and 7, the frame is provided with a wheel linkage structure (not shown), when the frame is folded, the front wheel assembly 3 and the rear wheel assembly 4 can turn inwards around the respective rotation center lines and are folded together with the frame in a flat manner, so that the folded frame has a very small volume. The wheel linkage structure may be implemented by the prior art (for example, patent application with application publication No. CN 109178077A), and the present invention is not limited thereto.

In order to further optimize the folding structure of the frame, in the present embodiment, the folding stroller further includes a seat frame 100 provided on the frame, and the seat frame 100 is located between the rear upper stays 431 on both sides in the left-right direction. When the frame is in the unfolded state, the seat frame 100 comprises a seat 110, a backrest 120 and a leg rest 130, wherein the seat 110 has an upward seat surface 110a, and the backrest 120 has a backrest surface 120a and a backrest side surface 120b which are respectively arranged at two sides different in the thickness direction; the leg rest 130 is rotatably coupled to a front end portion of the seat 110 about a rotation line i; a backrest mount 2 is rotatably provided at a lower portion of the backrest 120, and the backrest mount 2 is relatively movably provided on the seat 110 in a longitudinal extension direction of the seat 110.

When the frame is in the unfolded state, a child can normally sit on the seat frame 100, the backrest 120 supports the back, and the leg supports 130 support the legs; when the frame is folded, the backrest 120 is closed on the upper part of the seat 110, and the leg rest 130 is closed on the lower part of the seat 110.

The frame has at least a first bar and a second bar, the rear part of the seat 110 is connected to the first bar around a first rotation center line X in a rotating manner, the seat 110 can slide relatively along the front and back direction and can be connected to the second bar around a second rotation center line Y in a rotating manner, the second rotation center line Y and the first rotation center line X are parallel to each other and are positioned in front of the first rotation center line X, and when the frame is folded, the first rotation center line X and the second rotation center line Y are far away from each other.

In this embodiment, the rear support frame 430 constitutes a first bar frame; one of the front support 310, the rear support 320, and the handle frame 410 constitutes a second bar, and in this embodiment, the handle frame 410 specifically constitutes the second bar.

In other embodiments, the supporting rod 411 may be disposed on the upper portion of the front bracket 310 or the upper portion of the rear bracket 320, and one of the supporting rods 411 may constitute a second bracket.

Referring to fig. 4 to 8, specifically, the backrest installation bases 2 have two sets respectively disposed at the left and right sides of the backrest 120, each set of backrest installation bases 2 includes an upper installation base 21, a lower installation base 22 and a pin 211 fixedly disposed with each other, wherein the pin 211 is located between the upper installation base 21 and the lower installation base 22, the lower end of the backrest 120 is rotatably connected with the upper installation base 21 around a rotation line h, and the rotation line h extends along the left and right directions of the seat frame 100.

Seat 110 includes bedplate 11, sets firmly guide bar 12 in bedplate 11 bottom, forms the guide way that extends along the fore-and-aft direction between guide bar 12 and the bedplate 11, and in this embodiment, guide bar 12 has two along left and right direction interval setting, and bracing piece 411 supports in the below of bedplate 11, and bracing piece 411 can enough rotate relatively and insert in the guide way along fore-and-aft direction sliding fit ground, and guide bar 12 provides the sliding guide for bracing piece 411.

It should be noted that, in the present embodiment, the grab rail 412 and the support rod 411 of the grab rail frame 410 are integrally disposed, so that the support rod 411 can be inserted into the guide slot in a sliding fit manner along the front-back direction while relatively rotating, and the grab rail frame 410 has better rigidity. However, in other embodiments, the supporting rod 411 may be rotatably connected between the lower ends of the two side grab bars 412 around the second rotation center line Y, in which case the supporting rod 411 is only inserted in the guide groove in a sliding fit, so that the supporting rod 411 may also be designed as a special rod with any cross section such as a square, triangle, etc.

Two chutes 23 extending in the front-rear direction are formed in the seat plate 11, the two chutes 23 are parallel to each other and are respectively disposed on the left and right sides, the upper mounting seat 21 is located on the upper side of the chute 23, the lower mounting seat 22 is located on the lower side of the chute 23, and the pin shaft 211 is inserted into the corresponding chute 23, so that the backrest mounting seat 2 can slide in the front-rear direction along the chute 23, and the backrest 120 is driven to slide in the front-rear direction along the seat 110.

In this embodiment, the frame further has a driving mechanism for driving the backrest mounting seat 2 to slide relative to the seat 110 during the switching between the unfolded state and the folded state of the frame.

Specifically, the driving mechanism includes a driving lever 600, one end of the driving lever 600 is rotatably connected to the backrest mounting seat 2, and the other end of the driving lever 600 is rotatably connected to the frame and moves away from the first rotation center line X during the frame is converted from the unfolded state to the folded state, and in fact, the other end of the driving lever 600 is rotatably connected to one of the upper portion of the front frame 310, the upper portion of the rear frame 320, and the lower portion of the handle frame 410, and further, the other end of the driving lever 600 is rotatably connected to the supporting lever 411.

In this embodiment, the driving rod 600 has two driving rod joints 4111 that are matched with the two backrest installation seats 2, and two driving rod joints 4111 extending downward are fixed on the supporting rod 411. The rear end of each driving rod 600 is rotatably connected to the lower mounting seat 22 around a rotation line g, the front end of each driving rod 600 is rotatably connected to the driving rod joint 4111 around a third rotation center line Z, the rotation line g, the third rotation center line Z and the second rotation center line Y are parallel to each other, the third rotation center line Z is located below the second rotation center line Y, and in other embodiments, the third rotation center line Z and the second rotation center line Y may also extend collinearly.

Referring to fig. 9 to 13, in another aspect, the foldable stroller further includes a foot rest 200 provided on the front frame 310 for the child to place both feet, the foot rest 200 being slidably provided on the front frame 310 in a direction along the length of the front frame 310. When the frame is in the unfolded state, the foot rest 200 is in the first position on the front bracket 310; when the frame is in the folded state, the foot rest 200 is at the second position on the front bracket 310, the first position is below the second position on the front bracket 310, and the frame is further provided with a linkage mechanism for driving the foot rest 200 to slide relative to the front bracket 310 in the process of converting the frame between the unfolded state and the folded state.

Specifically, the linkage mechanism includes a linkage frame rotatably connected to the foot rest 200 about a fourth rotation center line P, and the linkage frame is relatively slidably connected to the front bracket 310; the front end of the driving rod portion 712 of the front link 710 is rotatably connected to the yoke about a sixth rotation center line R, and the fifth rotation center line Q is located at the junction between the main body rod portion 711 of the front link 710 and the driving rod portion 712. The fourth rotation center line P, the fifth rotation center line Q and the sixth rotation center line R are parallel to each other and extend along the left-right direction of the frame, wherein the fourth rotation center line P is located below the fifth rotation center line Q.

Furthermore, the front rod 311 is provided with a connecting convex pillar 51 protruding inwards, the connecting convex pillar 51 is rotatably connected with the front rod 710 around a fifth rotation center line Q, the foot rest 200 is provided with pedal connecting parts 220 respectively arranged at the left and right ends of the foot rest and extending upwards, each pedal connecting part 220 is provided with a first guide groove 52 extending along the vertical direction, and the connecting convex pillar 51 is inserted into the first guide groove 52 in a sliding fit manner.

The linkage frame comprises a linkage rod 61 extending along the left-right direction, the linkage rod 61 is connected to the foot rest 200 in a relative rotation manner around a fourth rotation center line P, actually, the axis of the linkage rod 61 forms the fourth rotation center line P, and the linkage rod 61 is connected to the foot rest 200 in a rotation manner around the axis of the linkage rod 61. The front support rod 311 is provided with a second guide groove 62 extending along the vertical direction, the end of the linkage rod 61 is inserted into the second guide groove 62 in a sliding fit manner, wherein the second guide groove 62 is located below the connecting convex column 51 in the length direction of the front support rod 311.

In addition, the linkage frame further includes a connecting member 63 disposed on the linkage rod 61 and extending backward from the linkage rod 61, the connecting member 63 specifically has two connecting members respectively disposed at the left and right ends of the linkage rod 61, and the driving rod portion 712 of each side is rotatably connected to the connecting member 63 around the sixth rotation center line R.

In this embodiment, the bottom of the footrest 200 is provided with a receiving slot 210, the driving rod portion 712, the connecting member 63 and the linkage rod 61 are all received in the receiving slot 210, wherein the driving rod portion 712 and the connecting member 63 are located in the receiving slot 210 at the bottom of the pedal connecting portion 220, the bottom of the receiving slot 210 is further fixedly provided with a limiting member 64, and the limiting member 64 limits the linkage rod 61 in the receiving slot 210.

In addition, the folding cart further comprises a locking device for locking the frame in the unfolded state, which can adopt the structure in the prior art, and the utility model is not limited.

The following specifically explains the working process of this embodiment:

referring to fig. 1 to 3, when the frame is in the unfolded state, the backrest mount 2 is located at the rear end of the slide groove 23, the support bar 411 is located at the rear end of the guide groove, the backrest 120 extends rearward and upward from the rear of the seat 110, the backrest surface 120a is disposed forward, the leg rest 130 extends downward from the front of the seat 110, and the foot rest 200 is located at the first position on the front bracket 310. At this time, the foot rest 200 is positioned low, and both feet can be comfortably placed on the foot rest 200 when a child sits on the seat 110.

Referring to fig. 14 to 15, when it is required to fold the vehicle frame, the locking device is first unlocked so that the respective rods of the vehicle frame can rotate or slide with each other, and then the push rod frame 420 is pressed down so that the armrest frame 410 and the rear support frame 430 rotate rearward about the respective rotation center lines. On one hand, the rear portion of the seat 110 rotates around the first rotation center line X, the front portion of the seat 110 rotates around the second rotation center line Y, and the first rotation center line X and the second rotation center line Y are separated from each other in the front-rear direction, and the support rod 411 slides forward along the guide groove, so that the driving rod 600 rotatably connected to the support rod 411 can pull the backrest mounting seat 2 rotatably connected to the other end portion of the driving rod 600 to slide forward along the slide groove 23, and further pull the backrest 120 to slide forward along the seat 110, and simultaneously the backrest 120 rotates backward to be horizontal around the rotation line h, and the back side surface 120b of the backrest 120 faces downward and is disposed opposite to the seat elevation surface 110a of the seat 110.

On the other hand, the rear support frame 430 rotates backward and is folded with the rear bracket 320, the sliding member 730 slides forward along the rear link 720, the front link 710 and the rear link 720 rotate and are folded relatively around the rotation line d, and the front bracket 310 and the rear bracket 320 are pulled to rotate and are folded around the rotation line c, in this process, the front link 710 rotates around the fifth rotation center line Q, the main body rod 711 rotates forward and is folded with the front rod 311, the driving rod 712 tilts backward, the connecting member 63 is pulled to move upward, so that the linkage rod 61 slides upward along the second guide slot 62, that is, the linkage moves upward along the front bracket 310, so that the foot rest 200 moves upward relative to the front bracket 310 as a whole, the first guide slot 52 moves upward along with the pedal connecting portion 220, and the connecting convex column 51 slides downward relative to the first guide slot 52.

In short, when the entire frame is converted from the unfolded state to the folded state, the driving mechanism can be linked with the seat frame 100 to be folded, and the linkage mechanism can be linked with the foot rest 200 to slide upward.

Referring to fig. 16 to 17, when the frame is in the folded state, the front bracket 310 and the rear bracket 320 are folded, and the front link 710 and the rear link 720 are folded between the front bracket 310 and the rear bracket 320; the seat 110 and the backrest 120 are closed to each other and are closed to each other with the rear bracket 320 and the rear support frame 430, the back side surface 120b is closed to the seat surface 110a, and the leg rest 130 rotates around the rotation line i and is closed to the bottom of the seat 110; the two sets of front wheel joints 31 are turned in opposite directions and gathered between the two front support rods 311 in the left-right direction, the two sets of rear wheel joints 41 are turned in opposite directions and gathered between the two rear support rods 321 in the left-right direction, the foot rest 200 is in the second position, and the front wheel body 32 is positioned below the foot rest 200. At this time, the foot rest 200 is relatively raised, so that the turnover of the front wheel assembly 3 is not affected, and the frame structure is more reasonable.

In summary, the folding cart of this embodiment, compared with the prior art, has at least the following advantages:

1. the frame is compact in structure in a folded state, small in occupied volume and convenient to carry and transport;

2. when the whole frame is folded, the folding of the seat frame 100 and the sliding of the foot rest 200 can be linked, no redundant steps are added, and the operation is very simple;

3. the backrest 120 is integrally arranged, so that the structure is simple, and the supporting strength is good;

4. under the prerequisite that does not increase the frame height, the frame is expanded the state, and foot rest 200 can normal use, and under the frame folded state, foot rest 200 can not disturb the upset of front wheel subassembly 3 again, adjusts in a flexible way.

The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.

Claims

1. The utility model provides a folding shallow, is in including having frame, the setting of expansion state and fold condition seat frame on the frame, its characterized in that: the seat frame comprises a seat and a backrest, the lower part of the backrest can be arranged on the seat in a relatively rotating and relatively sliding way along the length extension direction of the seat,

the frame has first rack and second rack at least, the rear portion of seat is connected with rotating on the first rack, the seat can enough be along fore-and-aft direction relative slip can connect with rotating relatively on the second rack, the frame is by the in-process that the fold condition changes of expansion state, first rack with the second rack mutual rotation draws in, just the back with the seat draws in each other and with the frame draws in together.

2. The folding cart of claim 1, wherein: the lower part of back is provided with the back mount pad with rotating, the back mount pad can set up along fore-and-aft direction relative slip on the seat, have on the frame be used for the frame in expand the state with the in-process of switching between the folded condition orders about the back mount pad is relative the gliding actuating mechanism of seat.

3. The folding cart of claim 2, wherein: the seat is provided with a sitting surface, the backrest is provided with a backrest surface and a back side surface which are respectively arranged at two sides different in the thickness direction of the backrest, when the frame is in an unfolded state, the back side faces backwards, and the backrest is arranged at the rear part of the seat; when the frame is in a folded state, the back side surface and the sitting surface are folded relatively, and the backrest installation seat is positioned at the front part of the seat.

4. The folding cart of claim 2, wherein: the driving mechanism comprises a driving rod, one end of the driving rod is rotationally connected to the backrest installation seat, the other end of the driving rod is rotationally connected to the second rod frame, the frame is in the process of being converted from the unfolding state to the folding state, and the other end of the driving rod is far away from the rear portion of the seat.

5. The folding cart of claim 4, wherein: the rear portion of seat is connected around first rotation center line rotatoryly on the first bar frame, the seat can be enough along fore-and-aft direction relative slip and connect around second rotation center line relative rotation on the second bar frame, the second rotation center line with first rotation center line is parallel to each other and is located the place ahead of first rotation center line, another tip of actuating lever is connected around third rotation center line rotatoryly on the second bar frame, the third rotation center line with second rotation center line is parallel to each other or collinear extension, the bicycle frame is by the development state to fold condition conversion in-process, the third rotation center line, second rotation center line all is kept away from along the fore-and-aft direction first rotation center line motion.

6. The folding cart of claim 2, wherein: be provided with the bracing piece that extends along left right direction on the second bar frame, the seat include the bedplate, set firmly in the guide bar of bedplate bottom, the guide bar with form the guide way that extends along the fore-and-aft direction between the bedplate, the bracing piece can enough rotate relatively and can insert along fore-and-aft direction sliding fit ground and establish in the guide way, just the bracing piece supports the below of bedplate.

7. The folding cart according to any one of claims 1 to 6, characterized in that: the frame comprises a front support, a rear support and an armrest frame which respectively extend along the up-down direction, wherein two of the upper part of the front support, the upper part of the rear support and the lower part of the armrest frame are rotationally connected, and the third one is rotationally connected with one of the two, or the upper part of the front support, the upper part of the rear support and the lower part of the armrest frame are rotationally connected with each other, and one of the front support, the rear support and the armrest frame forms the second rod frame.

8. The folding cart of claim 7, wherein: the frame still includes respectively along push rod frame and the back strut that extends from top to bottom, and sets up the fore-stock with link assembly between the after-poppet, the upper portion of handrail frame is connected with rotating on the push rod frame, the back strut with the after-poppet is connected with rotating, the lower part of push rod frame with the upper portion of after-strut is connected with rotating, link assembly includes preceding connecting rod and back connecting rod, the front portion of preceding connecting rod is connected with rotating the fore-stock, the rear portion of back connecting rod is connected with rotating the after-poppet, the rear portion of preceding connecting rod with the front portion of back connecting rod is connected with rotating, the lower part of back strut can rotate relatively and connect with relative sliding on the back connecting rod, the back strut constitute first pole frame.

9. The folding cart of claim 8, wherein: one of the upper part of the front bracket, the upper part of the rear bracket and the lower part of the armrest frame is provided with a support rod, the support rod can rotate relatively and can slide relatively along the front and rear directions to be connected with the seat, and the rear part of the seat is rotatably connected with the rear support frame.

10. The folding cart of claim 9, wherein: the lower part of the armrest frame is rotationally connected with the upper part of the rear support, the support rod is arranged on the upper part of the rear support or the lower part of the armrest frame, and when the frame is in a folded state, the seat and the backrest are mutually drawn together and the rear support frame are mutually drawn together.