CN110758536A - Foldable cart frame - Google Patents

Abstract

The invention belongs to the field of baby strollers, and discloses a foldable stroller frame. A push rod assembly rotatably connected to the other end of the assembly, a rear strut assembly rotatably connected to the push rod assembly, and a seat post rotatably connected to the rear wheel bracket, both with the seat rod and the rear strut assembly. A rotatably connected seatpost link, one end rotatably connected to the rear wheel bracket and the other end rotatably connected to the cross strut assembly of the rear strut assembly, and a foldable pedal assembly rotatably connected to the front wheel bracket , one end is rotatably connected to the cross strut assembly and the other end is slidably connected to the pedal link of the pedal assembly, and the cross strut assembly can drive the pedal link to fold. The above-mentioned foldable cart frame of the present invention has a simple and quick folding method, and has a small volume after being folded, which is convenient for storage and carrying.

Description

A foldable cart frame

technical field

The invention relates to the field of baby strollers, in particular to a foldable stroller frame.

Background technique

In the design of the frame structure of the baby stroller, in order to meet the convenience of carrying consumers, the stroller frame is generally designed to be a foldable structure, so that the baby stroller can be opened into a rideable type when it is in use. When not in use, it can be folded into a smaller volume for easy storage or portability.

The folding method of the existing infant stroller is cumbersome, the linkage method is incoherent, the folding is not convenient and fast, and the folded volume is large, difficult to place in a narrow space, and inconvenient for storage and carrying.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a foldable cart frame, which is simple and quick to fold, and has a small volume after being folded.

For this purpose, the present invention adopts the following technical solutions:

A foldable cart frame, comprising a rear wheel bracket, a front wheel bracket and a side grab bar assembly rotatably connected to the rear wheel bracket at one end, and a push rod assembly rotatably connected to the other end of the side grab bar assembly , the rear strut assembly rotatably connected with the push rod assembly, the seat rod rotatably connected with the rear wheel bracket, the seat rod link rotatably connected with both the seat rod and the rear strut assembly, one end of which rotates A cross brace assembly connected to the rear wheel bracket and the other end rotatably connected to the rear brace assembly, a foldable pedal assembly rotatably connected to the front wheel bracket, and one end rotatably connected to the cross brace and the other end is slidably connected to the pedal link of the pedal assembly, and the cross brace assembly can drive the pedal link to fold.

Preferably, the rear wheel bracket includes a left rear wheel bracket and a right rear wheel bracket arranged symmetrically, the rear strut assembly includes a left rear strut and a right rear strut arranged symmetrically, and the cross strut assembly includes a cross The upper cross brace and the lower cross brace are rotatably connected, both ends of the upper cross brace are rotatably connected to the left rear wheel bracket and the right rear brace, and the lower cross brace is located on the upper cross brace. Both ends of the lower cross brace and the lower cross brace are rotatably connected to the right rear wheel bracket and the left rear brace.

Preferably, one end of the pedal link is fixed with a first connection seat, and the first connection seat, the upper cross brace and the lower cross brace are coaxially pinned.

Preferably, the front wheel bracket includes a left front wheel bracket and a right front wheel bracket that are symmetrically arranged, the pedal rod assembly includes a left pedal rod, a right pedal rod and a second connecting seat, the left pedal rod, the right pedal rod The pedal rod and the second connecting seat are coaxially pinned, the other end of the pedal rod connecting rod slides through the second connecting seat, the left pedal rod is rotatably connected to the left front wheel bracket, and the The right pedal is rotatably connected to the right front wheel bracket.

Preferably, it also includes a parent-son strut assembly, the father-son strut assembly includes an upper parent-son strut and a lower parent-son strut that are crossed and rotatably connected, one end of the upper parent-son strut is rotatably connected with a right short father-son strut and the other One end is rotatably connected to the end of the left rear strut, the right short father-son strut is rotatably connected to the right rear strut; One end is rotatably connected to the end of the right rear strut, and the left short father-son strut is rotatably connected to the left rear strut.

Preferably, a front wheel support link is also included, and both ends of the front wheel support link are respectively rotatably connected to the front wheel support and the rear strut assembly.

Preferably, the push rod assembly includes a left push rod and a right push rod, one end of the left push rod is rotatably connected to a left push handle, one end of the right push rod is rotatably connected to a right push handle, and the left push handle and all Rotate connection between the right push handle.

Preferably, it also includes a locking mechanism, the locking mechanism includes a locking member disposed between the rear strut assembly and the push rod assembly, and a locking member disposed between the left push handle and the right push handle Unlock parts.

Preferably, a backrest rod assembly is also included, and the backrest rod assembly is rotatably arranged at one end of the seat post link.

Preferably, the front wheel bracket is rotatably connected with a front wheel assembly, and the rear wheel bracket is rotatably connected with a rear wheel assembly.

The beneficial effects of the present invention: by arranging the seat post, the seat post connecting rod and the cross brace assembly, and at the same time connecting the cross brace assembly and the stepping rod assembly through the pedal connecting rod, the linkage mode of the whole foldable cart frame is more coherent , and the folding method of the foldable cart frame is simpler, the folding is more convenient and quick, and the folded volume is small, which is convenient for storage and carrying.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the foldable cart frame provided by the present invention from one perspective;

FIG. 2 is a schematic three-dimensional structure diagram of the foldable cart frame provided by the present invention from another perspective;

3 is a side view of the foldable cart frame provided by the present invention;

4 is a schematic diagram showing the cross brace assembly and the father and son brace assembly of the foldable cart frame provided by the present invention;

5 is another schematic diagram showing the cross brace assembly and the father and son brace assembly of the foldable cart frame provided by the present invention;

6 is a schematic diagram of a limit block showing a pedal link of the foldable cart frame provided by the present invention;

7 is a schematic diagram of the foldable cart frame provided by the present invention in a preliminary folded state;

FIG. 8 is a schematic diagram of the foldable cart frame provided by the present invention in a middle folded state

FIG. 9 is a schematic diagram of the foldable cart frame provided by the present invention in a completed state of folding.

In the picture:

11, left rear wheel bracket; 12, right rear wheel bracket; 13, rear wheel assembly; 21, left front wheel bracket; 22, right front wheel bracket; 23, front wheel assembly; 31, left handrail; 32, right Side grab bar; 41, left push rod; 42, right push rod; 51, left rear strut; 52, right rear strut; 61, upper cross strut; 62, lower cross strut; 71, left tread bar; 72, right pedal; 73, second connecting seat; 74, fourth connecting seat; 81, upper father and son strut; 82, lower father and son strut; 83, right short father and son strut; 84, left short father and son strut; 91, left push handle; 92, right push handle; 101, seat post; 102, seat post connecting rod; 20, third connecting seat; 30, pedal connecting rod; 301, first connecting seat; 302, limit block ; 40, the front wheel bracket link; 50, the backrest rod assembly; 60, the front canopy rod assembly.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for convenience of description and simplified operation, rather than indicating Or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used for distinction in description, and have no special meaning.

The present invention provides a foldable cart frame, as shown in Figures 1-5, the foldable cart frame includes a rear wheel bracket, a front wheel bracket, a side grab bar assembly, a push bar assembly, a rear strut assembly, The seat post 101, the seat post link 102, the cross strut assembly, the pedal assembly, the father and son strut assembly, the backrest rod assembly 50, the front canopy rod assembly 60 and the locking mechanism, wherein: the above-mentioned rear wheel bracket includes symmetrically arranged left rear The wheel bracket 11 and the right rear wheel bracket 12, and the left rear wheel bracket 11 and the right rear wheel bracket 12 are rotatably provided with a rear wheel assembly 13; the front wheel bracket includes symmetrically arranged left front wheel bracket 21 and right front wheel bracket 22 , and both the left front wheel bracket 21 and the right front wheel bracket 22 are rotatably provided with a front wheel assembly 23; the above-mentioned side handrail assembly includes symmetrically arranged left handrail 31 and right handrail 32; above-mentioned push rod assembly includes symmetrical The left push rod 41 and the right push rod 42 are provided; the rear strut assembly includes a left rear strut 51 and a right rear strut 52 that are symmetrically arranged; the cross strut assembly includes an upper cross strut 61 and a lower cross strut that are crossed and rotatably connected strut 62; the above-mentioned pedal rod assembly includes symmetrically arranged left pedal rod 71 and right pedal rod 72, and a second connecting seat 73 coaxially pinned to the left pedal rod 71 and right pedal rod 72; the above-mentioned father-son strut rod assembly includes The upper father-son strut 81 and the lower father-son strut 82 that are crossed and rotatably connected, the right short father-son strut 83 rotatably connected to the upper father-son strut 81 at one end, and the left short father-son strut rotatably connected to the lower father-son strut 82 at one end 84.

In this embodiment, as shown in FIGS. 1-3 , the left front wheel bracket 21 is rotatably connected to the left rear wheel bracket 11 , the left handrail 31 is rotatably connected to the left rear wheel bracket 11 , and the left handrail 31 is rotatably connected to the left rear wheel bracket 11 . The above-mentioned left push rod 41 is also rotatably connected, and the left push rod 41 is rotatably connected to the above-mentioned left rear support rod 51 . Correspondingly, the above-mentioned right front wheel bracket 22 is rotatably connected to the right rear wheel bracket 12, the right handrail 32 is rotatably connected to the right rear wheel bracket 12, and the above-mentioned right handrail 32 is also rotatably connected to the above-mentioned right push rod 42, The right push rod 42 is rotatably connected to the above-mentioned right rear support rod 52 .

A left push handle 91 is rotatably connected to one end of the left push rod 41 , and a right push handle 92 is rotatably connected to one end of the right push rod 42 . The above locking mechanism includes a locking member disposed between the rear strut assembly and the push rod assembly, and an unlocking member disposed between the left push handle 91 and the right push handle 92 . The unlocking piece is slidably arranged at the connection between the left push handle 91 and the right push handle 92, and the locking piece can be arranged between the left push rod 41 and the left rear strut 51, or between the right push rod 42 and the right rear Between the struts 52 , the locking member can also be provided between the left push rod 41 and the left rear strut 51 and between the right push rod 42 and the right rear strut 52 . With the locking member, the entire vehicle can be locked after the frame of the foldable cart is unfolded. The unlocking piece can realize the unlocking between the left push handle 91 and the right push handle 92 and the entire vehicle for subsequent folding. The structures of the unlocking member and the locking member are common structures in the prior art, and will not be described again.

In this embodiment, the seat post 101 and the seat post link 102 are symmetrically arranged in two groups, the seat post 101 is rotatably connected to the seat post link 102, and the seat post 101 is rotatably connected to the rear wheel bracket, and the seat post is connected to the seat post. The rod 102 is also rotatably connected to the above-mentioned rear strut assembly (that is, the left seat post 101 is rotatably connected to the left rear wheel bracket 11, the left seat post link 102 is rotatably connected to the left rear strut 51; the right seat post 101 is rotatably connected to the right rear wheel bracket 12, and the right seat post link 102 is rotatably connected to the right rear strut 52). Through the arrangement of the seat post 101 and the seat post link 102 , the connection between the rear wheel bracket and the rear strut assembly can be realized, and at the same time, the linkage between the rear strut assembly, the seat post 101 and the seat post link 102 can be realized during the folding process. Effect.

Referring to FIGS. 4 and 5 , the upper cross brace 61 is located above the lower cross brace 62 , and the middle positions of the upper cross brace 61 and the lower cross brace 62 intersect and are pivotally pinned. The two ends of the upper cross brace 61 are respectively connected to the left rear wheel bracket 11 and the right rear brace 52 respectively, and the two ends of the lower cross brace 62 are connected to the right rear wheel bracket 12 and the left rear brace 51 respectively. Through the arrangement of the cross brace assembly, it can connect the rear wheel bracket with the rear brace assembly, and the upper cross brace 61 and the lower cross brace 62 arranged in a cross can further make the folding smoother and faster. In this embodiment, further, the third connecting seat 20 can be installed on the left rear wheel bracket 11 , the right rear wheel bracket 12 , the left rear strut 51 and the right rear strut 52 , and the two ends of the upper cross strut 61 pass through The third connecting seat 20 is rotatably connected to the left rear wheel bracket 11 and the right rear strut 52 respectively.

A pedal link 30 is also rotatably connected to the position where the upper cross brace 61 and the lower cross brace 62 intersect. Specifically, as shown in FIG. 5 , a first connecting seat 301 is provided at one end of the pedal link 30 . The first connecting seat 301 is coaxially pinned to the upper cross brace 61 and the lower cross brace 62 . The other end of the pedal rod link 30 is slid through the second connecting seat 73 of the pedal rod assembly.

Further, in this embodiment, as shown in FIG. 6 , limit blocks 302 are provided at the end and non-end positions of the pedal rod connecting rod 30 , and the two limit blocks 302 are respectively located on the second connecting seat 73 . Both ends are used to limit the pedal link 30 . The limiting block 302 at the end can prevent the pedal link 30 from leaving the second connecting seat 73, and the limiting block 302 located at the non-end position can abut against the second connecting seat 73 and drive the left pedal 71 and The right pedal 72 is rotated to realize the folding of the left pedal 71 and the right pedal 72 . In this embodiment, the above-mentioned limiting block 302 may be a protrusion or a screw cap, as long as it can limit the position of the pedal link 30 .

In this embodiment, preferably, the left pedal rod 71 and the right pedal rod 72 are rotatably connected to the left front wheel bracket 21 and the right front wheel bracket 22 through a fourth connecting seat 74 respectively.

In this embodiment, as shown in FIG. 5 , one end of the upper parent-son strut 81 that is not connected to the right short parent-son strut 83 is rotatably connected to the end of the left rear strut 51 , and the right short parent-son strut 83 is rotatably connected to the right rear strut 83 . The strut 52 is on; the end of the lower father-son strut 82 that is not connected to the left short father-son strut 84 is rotatably connected to the end of the right rear strut 52 , and the left short father-son strut 84 is rotatably connected to the left rear strut 51 . By arranging the upper parent-son strut 81, the right short parent-son strut 83, the lower father-son strut 82, and the left short parent-son strut 84, the left rear strut 51 and the right rear strut 52 can be further connected, thereby making the entire foldable The structure of the cart frame is more stable.

Optionally, a front wheel bracket link 40 is also connected between the front wheel bracket and the rear strut assembly. Specifically, the left front wheel bracket 21 and the left rear strut 51 are respectively rotatably connected to a front wheel bracket link 40 . Similarly, the right front wheel bracket 22 and the right rear strut 52 are respectively rotatably connected to the two ends of the other front wheel bracket link 40

In this embodiment, both ends of the above-mentioned backrest bar assembly 50 are rotatably connected to one end of the two seat post links 102 respectively.

The above-mentioned front canopy rod assembly 60 has a U-shaped structure, and its left end is coaxially pinned with the left handrail 31 and the left push rod 41, and its right end is coaxially pinned with the right handrail 32 and the right push rod 42. .

When the above-mentioned foldable cart frame of this embodiment is folded, the unlocking member is first pressed, so that the left push handle 91 and the right push handle 92 are unlocked, and then the left push handle 91 and the right push handle 92 are pushed downward and simultaneously toward the Press forward, at this time, the locks between the left push rod 41 and the left rear support rod 51 and between the right push rod 42 and the right rear support rod 52 are released, and then continue to press down the left push handle 91 and the right push handle 92 , forming the preliminary folded state shown in FIG. 7 .

Then continue to press down the left push handle 91 and the right push handle 92. At this time, the left push handle 91 and the right push handle 92 will drive the push rod assembly, the side armrest assembly and the rear support rod assembly to rotate downward to form the middle shown in Figure 8. folded state.

After that, continue to fold the whole vehicle, the rear strut assembly is finally attached to the rear wheel bracket, and finally the whole vehicle is folded to form the completed state of folding as shown in FIG. 9 .

Through the above structure, this embodiment can make the linkage of the whole foldable cart frame more coherent, and make the folding method of the foldable cart frame simpler, more convenient and quick to fold, and the folded volume is small, which is convenient for Store and carry.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A foldable cart frame is characterized by comprising a rear wheel bracket, a front wheel bracket and a side handrail rod component, wherein one end of the front wheel bracket is rotationally connected with the rear wheel bracket, a push rod component rotationally connected with the other end of the side handrail rod component, a rear support rod component rotationally connected with the push rod component, the bicycle pedal comprises a seat rod (101) rotatably connected with the rear wheel support, a seat rod connecting rod (102) rotatably connected with the seat rod (101) and the rear supporting rod assembly, a cross supporting rod assembly with one end rotatably connected with the rear wheel support and the other end rotatably connected with the rear supporting rod assembly, a pedal rod connecting rod (30) rotatably connected with the front wheel support and foldable pedal rod assembly and with one end rotatably connected with the cross supporting rod assembly and the other end slidably connected with the pedal rod assembly, and the cross supporting rod assembly can drive the pedal rod connecting rod (30) to be folded.

2. The foldable stroller frame according to claim 1, wherein the rear wheel support comprises a left rear wheel support (11) and a right rear wheel support (12) which are symmetrically arranged, the rear brace assembly comprises a left rear brace (51) and a right rear brace (52) which are symmetrically arranged, the cross brace assembly comprises an upper cross brace (61) and a lower cross brace (62) which are crossed and rotatably connected, two ends of the upper cross brace (61) are rotatably connected to the left rear wheel support (11) and the right rear brace (52), and the lower cross brace (62) is located below the upper cross brace (61) and two ends of the lower cross brace (62) are rotatably connected to the right rear wheel support (12) and the left rear brace (51).

3. The foldable stroller frame according to claim 2, wherein a first connecting seat (301) is fixedly arranged at one end of the pedal rod connecting rod (30), and the first connecting seat (301), the upper cross brace (61) and the lower cross brace (62) are coaxially pinned.

4. The foldable stroller frame according to any one of claims 1 to 3, wherein the front wheel bracket comprises a left front wheel bracket (21) and a right front wheel bracket (22) which are symmetrically arranged, the pedal lever assembly comprises a left pedal lever (71), a right pedal lever (72) and a second connecting seat (73), the left pedal lever (71), the right pedal lever (72) and the second connecting seat (73) are coaxially pinned, the other end of the pedal lever connecting rod (30) is slidably inserted into the second connecting seat (73), the left pedal lever (71) is rotatably connected to the left front wheel bracket (21), and the right pedal lever (72) is rotatably connected to the right front wheel bracket (22).

5. The foldable stroller frame according to claim 2, further comprising a parent-child stay assembly, wherein the parent-child stay assembly comprises an upper parent-child stay (81) and a lower parent-child stay (82) which are crossed and rotatably connected, one end of the upper parent-child stay (81) is rotatably connected with a right short parent-child stay (83) and the other end is rotatably connected with the end of the left rear stay (51), and the right short parent-child stay (83) is rotatably connected with the right rear stay (52); the one end of father-son vaulting pole (82) down rotates and is connected with short father-son vaulting pole (84) in a left side and the other end rotate connect in the tip of vaulting pole (52) behind the right side, short father-son vaulting pole (84) in a left side rotate connect in behind the left side on vaulting pole (51).

6. The foldable stroller frame according to claim 1, further comprising a front wheel carrier link (40), wherein both ends of said front wheel carrier link (40) are rotatably connected to said front wheel carrier and said rear stay assembly, respectively.

7. The foldable stroller frame according to claim 1, wherein the push rod assembly comprises a left push rod (41) and a right push rod (42), one end of the left push rod (41) is rotatably connected with a left push handle (91), one end of the right push rod (42) is rotatably connected with a right push handle (92), and the left push handle (91) and the right push handle (92) are rotatably connected with each other.

8. The foldable stroller frame according to claim 7, further comprising a locking mechanism comprising a locking member disposed between the rear stay assembly and the push rod assembly, and an unlocking member disposed between the left push handle (91) and the right push handle (92).

9. The foldable stroller frame according to claim 1, further comprising a backrest rod assembly (50), wherein the backrest rod assembly (50) is rotatably disposed at one end of the seat rod link (102).

10. The foldable stroller frame according to claim 1, characterized in that said front wheel support is rotatably connected with a front wheel assembly (13) and said rear wheel support is rotatably connected with a rear wheel assembly (23).

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