CN109849997B - Child cart - Google Patents

Abstract

The invention discloses a baby stroller, which comprises a stroller frame, a front bracket, a rear bracket, a backrest frame, a stay bar frame, a seat frame and a handle pushing frame, wherein the upper part of the front bracket, the upper part of the rear bracket and the lower part of the backrest frame are connected in a relatively rotating manner; the rear bracket comprises an upper bracket and a lower bracket which relatively slide and stretch along the length direction, the upper part of the upper bracket is rotationally connected with the front bracket or the backrest rod, the seat frame is rotationally connected between the front bracket and the lower bracket, and the support rod frame is rotationally connected between the backrest frame and the lower bracket; the lower part of the push handle frame is rotatably connected to the upper part of the front bracket or the upper part of the rear bracket or the lower part of the backrest frame, and the push handle frame can be switched between a forward working position and a reverse working position in the unfolded state of the cart frame. The trolley frame has the advantages of small number of rod pieces, simple structure, convenient unfolding and folding operation of the trolley frame and convenient reversing operation of the push handle, and brings convenience for daily use of users.

Description

Strollers

Technical Field

The invention relates to a baby stroller.

Background technique

In the prior art, there are various structures of baby strollers, which generally include a stroller frame with an unfolded state and a folded state, a wheel assembly disposed at the bottom of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state. Currently, there are many types of baby stroller frames, and the number of rods of the frames is different, and the connection relationship and connection position between the rods are different, so the folding principle and folding method are also different.

Summary of the invention

The object of the present invention is to provide a child stroller with a new structure and a reversible push handle.

To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a child stroller, comprising a stroller frame with an unfolded state and a folded state, a front wheel assembly arranged at the front bottom of the stroller frame, a rear wheel assembly arranged at the rear bottom of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state, the stroller frame comprising: a front bracket with the front wheel assembly at the bottom, a rear bracket with the rear wheel assembly at the bottom, a backrest frame, a strut frame, a seat frame and a handle frame, wherein two of the three components, the upper part of the front bracket, the upper part of the rear bracket and the lower part of the backrest frame, are rotatably connected and the third component is rotatably connected to one of the above two components, or the three components are rotatably connected to each other; the rear bracket comprises an upper bracket and a lower bracket that are relatively slidable and retractable along the length direction, the upper part of the upper bracket is rotatably connected to the front bracket or the backrest frame, the seat frame is rotatably connected between the front bracket and the lower bracket, and the strut frame is rotatably connected between the backrest frame and the lower bracket,

The lower part of the push handle frame is rotatably connected to the upper part of the front bracket, the upper part of the rear bracket or the lower part of the backrest frame. The push handle frame has a forward working position and a reverse working position. When the push handle frame is in the forward working position, the push handle frame gradually extends upward from front to back; when the push handle frame is in the reverse working position, the push handle frame gradually extends upward from back to front. When the cart frame is in a folded state, the upper bracket and the lower bracket slide relative to each other to extend the rear bracket, and the push handle frame and the backrest frame are folded together at the rear side of the rear bracket.

Preferably, the upper bracket includes a sliding sleeve rod, the lower bracket includes a bracket rod body, and the sliding sleeve rod is relatively slidably disposed on the upper portion of the bracket rod body.

Furthermore, a limiting sleeve is fixedly provided on the support rod body, and when the cart frame is in the unfolded state, the limiting sleeve abuts against the bottom end of the sliding sleeve rod.

Furthermore, the seat frame and/or the support rod frame are rotatably connected to the limiting sleeve to achieve a rotatable connection with the lower bracket.

Furthermore, the rear support includes two rear support rods disposed on the left and right sides, each of the rear support rods includes the sliding rod and the support rod body, and the lower part of the support rod body on each side is provided with the rear wheel assembly.

Preferably, the strut frame extends in the up-down direction, the seat frame extends in the front-back direction, and the lower portion of the strut frame and the rear portion of the seat frame are respectively rotatably connected to the lower bracket; or, the lower portion of the strut frame and the rear portion of the seat frame are rotatably connected to the lower bracket around the same rotation center line; or, the lower portion of the strut frame is rotatably connected to the rear portion of the seat frame, and one of the lower portion of the strut frame and the rear portion of the seat frame is rotatably connected to the lower bracket.

Preferably, the cart frame also includes an armrest frame arranged on the upper part of the front bracket and extending forward, and the cart frame is also provided with a reversing locking member for locking the push handle frame in the forward working position and the reverse working position. When the push handle frame is in the forward working position, the reversing locking member locks the push handle frame and the backrest frame with each other; when the push handle frame is in the reverse working position, the reversing locking member locks the push handle frame and the armrest frame with each other.

Preferably, the front bracket includes two front support rods respectively arranged on the left and right sides, and the front wheel assembly is provided at the bottom of each of the front support rods; the rear bracket includes two rear support rods respectively arranged on the left and right sides, and the rear wheel assembly is provided at the bottom of each of the rear support rods, and when the cart frame is in a folded state, the two rear wheel assemblies are located between the two front wheel assemblies in the left-right direction, and the front wheel assembly and the rear wheel assembly are jointly supported on the ground.

Furthermore, the upper part of the front bracket, the upper part of the rear bracket, the lower part of the push handle bracket and the lower part of the backrest bracket are rotatably connected to each other, and the locking mechanism includes a main locking joint arranged between the upper part of the front bracket, the upper part of the rear bracket and the lower part of the backrest bracket.

Furthermore, the front bracket includes two front support rods respectively arranged on the left and right sides, and the cart frame also includes a handrail frame arranged between the upper parts of the front support rods on both sides, the handrail frame includes a base rod fixedly connected to the front support rods and extending forward, and a handrail rod rotatably connected between the base rods on both sides, when the cart frame is in a folded state, the handrail rod is flipped relative to the base rod and folded on the front side of the front bracket.

Furthermore, the armrest frame also includes an armrest locking joint arranged between the base rod and the armrest rod, and the armrest locking joint and the main locking joint are provided with a linkage structure. When the front bracket, the rear bracket and the backrest frame are retracted with each other, when the armrest rod rotates relative to the base rod, the linkage structure drives the main locking joint to switch from an unlocked state to a locked state.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the stroller of the present invention, whose stroller frame only includes a front bracket, a rear bracket, a seat frame, a backrest frame, a support rod frame and a push handle frame, can not only complete the unfolding and folding of the stroller frame, but also enable the stroller frame to switch the working position of the push handle frame as needed in the unfolded state to meet the needs of forward or reverse pushing in daily use. The stroller frame has a small number of rods and a simple structure. The unfolding and folding operations of the frame and the reversing operation of the push handle are very convenient, which brings convenience to the user's daily use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of the child stroller of the present invention in an unfolded state, wherein the handle frame is in a forward working position;

FIG2 is a perspective view of the child stroller of the present invention in an unfolded state, wherein the handlebar frame is in a reverse working position;

Figures 3 to 5 are schematic diagrams of the folding principle of the child stroller of the present invention;

Among them: 1. front bracket; 11. front support rod; 12. foot pedal; 2. rear bracket; 21. sliding rod; 22. bracket rod body; 23. limit sleeve; 24. rear cross bar; 3. backrest frame; 31. backrest rod; 32. push handle forward locking seat; 4. seat frame; 41. seat rod; 5. support rod frame; 51. support rod; 6. handrail frame; 61. base rod; 62. handrail rod; 63. handrail locking joint; 64. push handle reverse locking seat; 7. push handle frame; 71. lower push handle; 72. upper push handle; 73. push handle locking joint; 74. reversing locking member; 8. main locking joint; 9. unlocking handle; 10. front wheel assembly; 20. rear wheel assembly.

Detailed ways

The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

1 to 5 , the stroller includes a stroller frame having an unfolded state and a folded state, a front wheel assembly 10 disposed at the front bottom of the stroller frame, a rear wheel assembly 20 disposed at the rear bottom of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state.

The stroller frame includes: a front bracket 1 with a front wheel assembly 10 at the bottom, a rear bracket 2 with a rear wheel assembly 20 at the bottom, a backrest frame 3, a seat frame 4 and a strut frame 5, wherein the front bracket 1, the rear bracket 2 and the backrest frame 3 each extend in the up-down direction when the stroller frame is unfolded, two of the three components, namely the upper part of the front bracket 1, the upper part of the rear bracket 2 and the lower part of the backrest frame 3, are rotatably connected and the third component is rotatably connected to one of the two components, or the three components are rotatably connected to each other.

The rear bracket 2 includes an upper bracket and a lower bracket that slide and retract relatively along the length direction, wherein the upper portion of the upper bracket is rotatably connected to the upper portion of the front bracket 1 or the lower portion of the backrest bracket 3, the seat frame 4 is rotatably connected between the front bracket 1 and the lower bracket, and the support rod frame 5 is rotatably connected between the backrest bracket 3 and the lower bracket. In this embodiment, the upper portion of the front bracket 1, the upper portion of the rear bracket 2, and the lower portion of the backrest bracket 3 are rotatably connected to each other, that is, the upper portion of the front bracket 1, the upper portion of the upper bracket, and the lower portion of the backrest bracket 3 are rotatably connected to each other.

As shown in the accompanying drawings, the seat frame 4 extends in the front-to-back direction, the strut frame 5 extends in the up-down direction, and the lower portion of the strut frame 5 and the rear portion of the seat frame 4 are respectively rotatably connected to the lower bracket; or, the lower portion of the strut frame 5 and the rear portion of the seat frame 4 are rotatably connected to the lower bracket around the same rotation center line; it can also be arranged that the lower portion of the strut frame 5 is rotatably connected to the rear portion of the seat frame 4, and then one of the lower portion of the strut frame 5 and the rear portion of the seat frame 4 is rotatably connected to the lower bracket.

As shown in the drawings, in this embodiment, the front bracket 1 includes two front support rods 11 disposed on the left and right sides, a foot pedal 12 is further disposed between the lower parts of the front support rods 11 on both sides, and a front wheel assembly 10 is mounted on the lower part of each front support rod 11; in the rear bracket 2, the upper bracket includes two sliding rods 21 disposed on the left and right sides, and the lower bracket includes two support rod bodies 22 disposed on the left and right sides, and the sliding rods 21 can be relatively slidably disposed on the upper parts of the corresponding side support rod bodies 22, and here the sliding rods 21 are sleeved on the support rod bodies 22. On the left and right sides of the cart frame, the sliding rods 21 and the support rod bodies 22 together form the rear support rods of the rear bracket 2, and a rear wheel assembly 20 is mounted on the lower part of each support rod body 22, and a rear cross bar 24 is further fixed between the support rod bodies 22 on both sides. On the left and right sides of the rear bracket 2 , a limiting sleeve 23 is fixedly provided on the bracket rod body 22 . When the cart frame is in the unfolded state, the limiting sleeve 23 abuts against the bottom end of the sliding sleeve rod 21 .

The backrest frame 3 also includes two backrest rods 31 respectively arranged on the left and right sides and extending in the up-down direction. Here, the upper parts of the backrest rods 31 on both sides are connected to make the backrest frame 3 form a U-shape with the opening facing downward; the seat frame 4 includes two seat rods 41 respectively arranged on the left and right sides and extending in the front-back direction, and the support rod frame 5 includes two support rods 51 respectively arranged on the left and right sides and extending in the up-down direction.

On the left and right sides of the stroller frame, the upper part of the front support rod 1, the upper part of the sliding rod 21 and the lower part of the backrest rod 31 are rotatably connected together around the same rotation center line through the main locking joint 8, the front part of the seat rod 41 is rotatably connected to the front support rod 1, the upper part of the support rod 51 is rotatably connected to the backrest rod 31, and the rear part of the seat rod 41 and the lower part of the support rod 51 are rotatably connected to the limit sleeve 23 through the same rotation axis and are rotatably connected to the rear support rod respectively. When the main locking joint 8 is locked, the front bracket 1, the rear bracket 2, the backrest frame 3, the seat frame 4 and the support rod frame 5 remain relatively locked.

As shown in the drawings, the cart frame also includes a handrail frame 6 disposed between the front support rods 1 on both sides, and the handrail frame 6 includes two base rods 61 disposed on the left and right sides and fixedly connected to the front support rods 11 on the corresponding sides, and a handrail rod 62 rotatably connected between the base rods 61 on both sides. Specifically, the base rod 61 extends forward from the front support rod 11, and the handrail rod 62 is in a U-shape with an opening facing backward, and the rear parts of both ends thereof are rotatably connected to the front part of the base rod 61 on the corresponding side through handrail locking joints 63. In this way, the handrail rod 62 can be flipped downward when the cart frame is folded so that it is folded in front of the front support 1 to reduce the occupied space.

Referring to the accompanying drawings, the cart frame also includes a handle frame 7, the lower part of which is rotatably connected to the upper part of the front support 1, or the upper part of the rear support 2, or the lower part of the backrest frame 3. In this embodiment, the handle frame 7 has handle rods arranged on the left and right sides, and the handle rods on each side include a lower handle 71, an upper handle 72 whose lower part is rotatably connected to the upper part of the lower handle 71 through a handle locking joint 73, and the lower part of the lower handle 71 is rotatably connected to the upper part of the front support rod 1 on the same side, the upper part of the sliding rod 21, and the lower part of the backrest rod 31 around the same rotation center line. The top of the upper handle 72 is also provided with an unlocking handle 9, which is used to unlock the handle locking joint 73. When setting, the handle locking joint 73 can be arranged to be unlocked in linkage with the main locking joint 8, so that when the upper handle 72 is flipped and folded relative to the lower handle 71, the main locking joint 8 is unlocked in linkage.

The push handle frame 7 has a forward working position and a reverse working position. When the push handle frame 7 is in the forward working position, the push handle frame 7 gradually extends upward from the front to the rear, and an adult can stand behind the rear wheel assembly 20 to push the cart; when the push handle frame 7 is in the reverse working position, the push handle frame 7 gradually extends upward from the rear to the front, and an adult can stand in front of the front wheel assembly 10 to push the cart facing the backrest frame 3.

The pushcart frame also includes a reversing locking member 74 for locking the push handle frame 7 in the above-mentioned forward working position and reverse working position. Here, the above-mentioned reversing locking member 74 is provided on each side of the lower push handle 71, the left and right sides of the backrest frame 3 are provided with push handle forward locking seats 32, and the left and right sides of the base rods 61 of the handrail frame 6 are provided with push handle reverse locking seats 64. When the push handle frame 7 is in the forward working position, the reversing locking member 74 cooperates with the push handle forward locking seat 32 on the corresponding side to lock the push handle frame 7 relative to the backrest frame 3; when the push handle frame 7 is in the reverse working position, the reversing locking member 74 cooperates with the push handle reverse locking seat 64 on the corresponding side to lock the push handle frame 7 relative to the handrail frame 6.

Thus, referring to FIG. 1 and FIG. 2, when the cart frame is in the unfolded state, the front bracket 1, the rear bracket 2 and the backrest bracket 3 are relatively unfolded, the seat frame 4 is supported between the front bracket 1 and the lower bracket of the rear bracket 2 in the front-to-back direction, the support rod frame 5 is supported between the backrest bracket 3 and the lower bracket of the rear bracket 2 in the up-down direction, the upper bracket and the lower bracket of the rear bracket 2 are relatively contracted, and the sliding sleeve rod 21 on each side rear support rod is downwardly pressed against the limit sleeve 23 of the bracket rod body 22; the main locking joint 8 is locked so that the cart frame is in a stable unfolded state. The user can lock the push handle frame 7 relative to the backrest frame 3 to make it in the forward working position as shown in FIG. 1, or lock the push handle frame 7 relative to the backrest frame 3 to make it in the reverse working position as shown in FIG. 2.

When the pushcart frame needs to be folded up, as shown in FIGS. 3 to 5 , firstly, the pushcart frame 7 is placed in the forward working position, and the upper pushcart 72 is first flipped forward and folded relative to the lower pushcart 71 as shown in FIG. 3 . During the folding of the pushcart frame 7 , the main locking joint 8 is driven to be unlocked in linkage, and the backrest frame 3 is driven to flip backward in conjunction with the pushcart frame 7 , so that the seat frame 4 and the support rod frame 5 are relative to the support rod body 22 of the rear support 2 , thereby driving the front support 1 and the rear support 2 to gradually close in the front-to-back direction, and at the same time, the sliding rod 21 of the rear support 2 gradually extends upward relative to the support rod body 22 to extend the rear support 2 . Until the front support 1 , the rear support 2 and the backrest frame 3 are close to each other, and the seat frame 4 and the support rod frame 5 are closed therein, as shown in FIG. 5 ; finally, the handrail 62 of the handrail frame 6 is flipped downward to be closed to the front side of the front support 1 , and the folding of the pushcart frame is completed. In the folded stroller frame, the two rear wheel assemblies 20 are located between the two front wheel assemblies 10 in the left-right direction. When viewed from the side of the frame, the rear wheel assemblies 20 are blocked by the front wheel assemblies 10, and the front wheel assemblies 10 and the rear wheel assemblies 20 are supported on the ground together.

During setting, the armrest locking joint 63 and the main locking joint 8 can be set in linkage, specifically, a linkage structure is set between the connections, so that after the cart frame body is folded, that is, after the front bracket 1, the rear bracket 2 and the backrest frame 3 of the cart frame are retracted, the armrest rod 62 is driven to rotate relative to the base rod 61. In the process, the above-mentioned linkage structure drives the main locking joint 8 to switch from an unlocked state to a locked state, so that the front bracket 1, the rear bracket 2 and the backrest frame 3 are re-locked, and then the cart frame is locked in the folded state, which is more conducive to the storage and storage of the cart frame after folding.

When the trolley frame needs to be opened, the locking mechanism of the entire trolley is unlocked by operating the unlocking handle 9, and then the backrest frame 3 is lifted or the push handle frame 7 is swung, so that the rods of the trolley frame can be relatively rotated and opened under the action of their own gravity until the locking joints of the locking mechanism are re-locked, and the trolley frame is opened.

The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a children's shallow, includes has the shallow frame of expansion state and folding state, locates the front wheel subassembly at shallow frame bottom front portion, locates the rear wheel subassembly at shallow frame bottom rear portion, and be used for with shallow frame locking mechanism under the expansion state, its characterized in that: the cart frame includes: the bottom is provided with a front bracket of the front wheel assembly, a rear bracket of the rear wheel assembly, a backrest frame, a stay bar frame, a seat frame and a push handle frame, wherein the upper part of the front bracket, the upper part of the rear bracket, the lower part of the push handle frame and the lower part of the backrest frame are mutually and rotatably connected together; the rear bracket comprises an upper bracket and a lower bracket which relatively slide and stretch along the length direction, the upper part of the upper bracket is rotationally connected with the front bracket or the backrest frame, the seat frame is rotationally connected between the front bracket and the lower bracket, the supporting rod frame is rotationally connected between the backrest frame and the lower bracket,

The lower part of the push handle frame is rotatably connected to the upper part of the front bracket, the upper part of the rear bracket or the lower part of the backrest frame, the push handle frame is provided with a forward working position and a reverse working position, and when the push handle frame is in the forward working position, the push handle frame gradually and upwards inclines and extends from front to back; when the push handle frame is in a reverse working position, the push handle frame gradually extends upwards from back to front, when the cart frame is in a folded state, the upper bracket and the lower bracket relatively slide to enable the rear bracket to extend, the push handle frame and the backrest frame are folded together at the rear side of the rear bracket,

The locking mechanism comprises a main locking joint arranged between the upper part of the front bracket, the upper part of the rear bracket and the lower part of the backrest frame,

The front bracket comprises two front struts which are respectively arranged at the left side and the right side, the trolley frame also comprises a handrail frame which is arranged between the upper parts of the front struts at the two sides, the handrail frame comprises a base rod which is fixedly connected with the front struts and extends forwards, and a handrail rod which is rotationally connected between the base rods at the two sides, when the trolley frame is in a folding state, the handrail rod overturns relative to the base rod and is folded at the front side of the front bracket,

The handrail frame also comprises a handrail locking joint arranged between the base rod and the handrail rod, wherein the handrail locking joint and the main locking joint are provided with a linkage structure, and when the front support, the rear support and the backrest frame are mutually folded, the handrail rod rotates relative to the base rod, and the linkage structure drives the main locking joint to be converted from an unlocking state to a locking state, so that the trolley frame is locked in the folding state.

2. The stroller of claim 1, wherein: the upper support comprises a sliding sleeve rod, the lower support comprises a support rod body, the sliding sleeve rod can be arranged on the upper portion of the support rod body in a relatively sliding mode, a limiting sleeve is fixedly arranged on the support rod body, and when the trolley frame is in a unfolding state, the limiting sleeve abuts against the bottom end portion of the sliding sleeve rod.

3. The stroller of claim 2, wherein: the seat frame and/or the stay bar frame are/is rotatably connected to the limit sleeve to realize the rotary connection with the lower bracket.

4. The stroller of claim 2, wherein: the rear support comprises two rear support rods which are respectively arranged at the left side and the right side, each rear support rod comprises a sliding sleeve rod and a support rod body, and the lower part of each support rod body at each side is provided with a rear wheel assembly.

5. The stroller of claim 1, wherein: the support rod frame extends in the up-down direction, the seat frame extends in the front-back direction, and the lower part of the support rod frame and the rear part of the seat frame are respectively and rotatably connected with the lower bracket; or the lower part of the stay bar frame and the rear part of the seat frame are rotationally connected to the lower bracket around the same rotation center line; or the lower part of the support rod frame is rotatably connected with the rear part of the seat frame, and one of the lower part of the support rod frame and the rear part of the seat frame is rotatably connected with the lower bracket.

6. The stroller of claim 1, wherein: the trolley frame also comprises a handrail frame which is arranged on the upper part of the front bracket and extends forwards, and a reversing locking piece which is used for locking the trolley frame in the forward working position and the reverse working position is also arranged on the trolley frame; when the handle pushing frame is in the reverse working position, the reversing locking piece locks the handle pushing frame and the handrail frame with each other.

7. The stroller of claim 1, wherein: the front support comprises two front support rods which are respectively arranged at the left side and the right side, and the bottom of each front support rod is provided with the front wheel assembly; the rear support comprises two rear supporting rods which are respectively arranged at the left side and the right side, the bottom of each rear supporting rod is provided with a rear wheel assembly, when the trolley frame is in a folded state, the two rear wheel assemblies are positioned between the two front wheel assemblies along the left-right direction, and the front wheel assemblies and the rear wheel assemblies are jointly supported on the ground.