CN112009553B - Child cart - Google Patents

Abstract

The present invention discloses a child stroller, comprising a stroller frame with an unfolded state and a folded state, the frame comprising side brackets arranged on the left and right sides and each of which can be folded, a cross brace assembly that can be folded in the left and right direction between the two groups of side brackets, a rear bracket arranged behind the two groups of side brackets and extending in the up-down direction, and a push rod frame extending in the up-down direction and having a handle on the upper part, wherein the rear part of the side bracket is connected to the rear bracket, and the push rod frame is connected to the rear bracket and can be folded relative to the rear bracket. When the stroller frame is in the folded state, the side brackets on both sides are folded and folded together with the rear bracket and the push rod frame, and the cross brace assembly is folded and the two groups of side brackets are folded in the left-right direction. The child stroller can realize the folding of the frame in the left-right, front-back, and up-down directions through the structure of a multi-link combination, so that the size of the frame after final folding is extremely small, which is convenient for carrying and storage.

Description

Strollers

Technical Field

The invention relates to a foldable baby stroller.

Background Art

In the existing foldable child strollers, the rod connection relationships of the stroller frames are different, and the folding principles are also different. Most of the stroller frames are still large after being folded, which is inconvenient to carry and store.

Summary of the invention

The object of the present invention is to provide a child stroller which is extremely small in size after being folded.

In order to achieve the above object, the technical solution adopted by the present invention is:

The stroller according to claim 1, wherein the front wheel assembly is arranged at a lower portion of the front portion of the stroller frame, the rear wheel assembly is arranged at a lower portion of the stroller frame, and the rear wheel assembly is arranged at a lower portion of the stroller frame.

Preferably, the side bracket at least includes a front support rod extending in the up-down direction and having the front wheel assembly at the bottom, a rear connecting rod extending in the front-to-back direction and rotatably connected to the lower part of the rear bracket at the rear, a pull rod extending in the front-to-back direction and connected to the rear bracket at the rear so as to be relatively rotatable and relatively slidable in the up-to-down direction, and a connecting rod assembly connected between the front support rod and the rear connecting rod and the pulling rod. When the cart frame is converted from an unfolded state to a folded state, the rear part of the pulling rod and the rear part of the rear connecting rod move away from each other, so that the front support rod, the connecting rod assembly, the rear connecting rod and the pulling rod are retracted into each other and close to the rear bracket.

Preferably, the connecting rod assembly includes an upper connecting rod, a lower connecting rod and a rocker rod, each extending in the front-to-back direction, wherein the upper connecting rod is located above the lower connecting rod, the front portion of the upper connecting rod is rotatably connected to the upper portion of the front support rod, and the rear portion of the upper connecting rod is rotatably connected to the pull rod; the front portion of the lower connecting rod is rotatably connected to the front support rod, the rear portion of the lower connecting rod is rotatably connected to the front portion of the rocker rod, the rear portion of the rocker rod is rotatably connected to the rear connecting rod, the front portion of the pull rod is rotatably connected to the lower connecting rod, and the front portion of the rear connecting rod is rotatably connected to the pull rod.

Preferably, when the cart frame is in the unfolded state, the upper connecting rod is located above the pull rod, and the rear connecting rod is located below the pull rod, and the rear portion of the upper connecting rod and the front portion of the rear connecting rod are rotatably connected to the pull rod around the same rotating axis, or are each rotatably connected to the pull rod via a rotating axis.

Preferably, when the cart frame is in the unfolded state, the front support rod extends gradually upward from front to rear, the upper connecting rod, the lower connecting rod and the rear connecting rod extend gradually downward from front to rear respectively, and the pull rod and the swing rod extend gradually upward from front to rear.

Preferably, the cross brace assembly includes a connecting head and two support rods respectively arranged on the left and right sides of the connecting head, one end of the support rod is rotatably connected to the connecting head, and the other end of the support rod is rotatably connected to a rotating member, and the rotating member can be connected to the lower link so as to be relatively rotatable around the axis of the lower link. When the cart frame is converted from an unfolded state to a folded state, the connecting head moves forward, and the two support rods are relatively rotated and gathered between the side brackets on both sides.

Preferably, a sliding member is slidably provided on the rear bracket, and the rear parts of the pull rods in the side brackets on both sides are rotatably connected to the sliding member respectively.

Preferably, the rear bracket has two rear support rods arranged parallel to each other, the sliding member includes two sliding sleeve parts respectively mounted on the two rear support rods, and a connecting part connected between the two sliding sleeve parts, and the pull rods on the left and right sides are respectively rotatably connected to the sliding sleeve parts on the same side.

Preferably, the child stroller further comprises a seat mechanism disposed on the stroller frame, the seat mechanism comprising a seat and a backrest, the front portion of the seat being connected to the upper portion of the front support rod, and the upper portion of the backrest being connected to the push rod frame.

Preferably, the push rod frame can be connected to the rear bracket in a relatively slidable manner along the length extension direction of the rear bracket.

The directional words such as up and down, left and right, front and back, inside and outside involved in the present invention are defined according to the up and down, left and right, front and back, inside and outside directions of the child when the child rides in the child stroller.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the stroller frame of the child stroller of the present invention can be folded in the left and right, front and back, and up and down directions through a structure composed of multiple rods, so that the size of the frame after final folding is extremely small, which is convenient for carrying and storage.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the three-dimensional structure of a child stroller in an unfolded state according to Embodiment 1 of the present invention;

FIG2 is a schematic diagram of the three-dimensional structure of the child stroller of Example 1 in the unfolded state, omitting one side support;

FIG3 is a schematic diagram of the three-dimensional structure of the child stroller of Example 1 in the unfolded state from another angle;

FIG4 is a schematic diagram of the three-dimensional structure of the child stroller including the seat mechanism in the unfolded state of Embodiment 1;

FIG5 is a schematic diagram of the three-dimensional structure of the child stroller of Example 1 during the folding process;

FIG6 is a schematic diagram of the three-dimensional structure of the child stroller of Example 1 in a folded state;

FIG7 is a schematic diagram of the three-dimensional structure of the child stroller of Example 2 in an unfolded state;

Among them: 1. cart frame; 11. side bracket; 111. front support rod; 112. upper connecting rod; 113. pull rod; 114. lower connecting rod; 115. swing rod; 116. rear connecting rod; 12. cross brace assembly; 121. connector; 122. support rod; 123. rotating part; 13. rear bracket; 131. rear support rod; 14. push rod frame; 15. handle; 16. sliding part; 161. sliding sleeve; 162. connecting part; 162, connecting part; 2. front wheel assembly; 3. rear wheel assembly; 4. seat mechanism; 41. seat; 42. backrest.

DETAILED DESCRIPTION

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

Example 1

The child stroller as shown in Figures 1 and 6 includes a stroller frame 1 with an unfolded state and a folded state, a front wheel assembly 2 arranged at the bottom front part of the stroller frame 1, a rear wheel assembly 3 arranged at the bottom rear part of the stroller frame, and a locking mechanism for locking the stroller frame 1 in the unfolded state, wherein the specific structure of the locking mechanism is not the technical point to be protected by this patent, and the structure in the prior art can be adopted.

As shown in Fig. 1 and Fig. 2, the cart frame 1 includes side brackets 11 arranged on the left and right sides and each of which can be folded, a cross brace assembly 12 that can be folded in the left and right direction and arranged between the two sets of side brackets 11, a rear bracket 13 that is arranged behind the two sets of side brackets 11 and extends in the up-down direction, and a push rod frame 14 that extends in the up-down direction and has a handle 15 on the upper part, and a sliding member 16 is also slidably arranged on the rear bracket 13. Among them, the front wheel assembly 2 is arranged below the front part of the side bracket 11, the rear part of the side bracket 11 is connected to the rear bracket 13, and the push rod frame 14 can be relatively slidably connected to the rear bracket 13 along the length extension direction of the rear bracket 13.

As shown in Fig. 1 and Fig. 2, the side bracket 11 comprises a front support rod 111 extending in the up-down direction and having a front wheel assembly 2 at the bottom, a rear connecting rod 116 extending in the front-back direction and having a rear portion connected to the lower portion of the rear bracket 13 rotatably around the h-axis, a pull rod 113 extending in the front-back direction and having a rear portion connected to the rear bracket 13 so as to be relatively rotatable and relatively slidable in the up-down direction, and a connecting rod assembly connected between the front support rod 111, the rear connecting rod 116 and the pull rod 113. Among them, the rear portion of the pull rod 113 is connected to the sliding member 16 rotatably around the i-axis.

As shown in FIG2 , in this embodiment, specifically, the connecting rod assembly comprises an upper connecting rod 112, a lower connecting rod 114 and a swing rod 115, each extending in the front-back direction, wherein the upper connecting rod 112 is located above the lower connecting rod 114. The front portion of the upper connecting rod 112 is rotatably connected to the upper portion of the front support rod 111 around the b axis, and the rear portion of the upper connecting rod 112 is rotatably connected to the pull rod 113 around the c axis; the front portion of the lower connecting rod 114 is rotatably connected to the front support rod 111 around the a axis, the rear portion of the lower connecting rod 114 is rotatably connected to the front portion of the swing rod 115 around the e axis, and the rear portion of the swing rod 115 is rotatably connected to the rear connecting rod 116 around the g axis; the front portion of the pull rod 113 is rotatably connected to the lower connecting rod 114 around the d axis, and the front portion of the rear connecting rod 116 is rotatably connected to the connecting rod 113 around the f axis. In some other embodiments, the f axis and the c axis may also be coaxial.

As shown in Figure 2, when the cart frame 1 is unfolded, the upper connecting rod 112 is located above the pull rod 113, and the rear connecting rod 116 is located below the pull rod 113; the front support rod 111 extends gradually upward from front to back, the upper connecting rod 112, the lower connecting rod 114, and the rear connecting rod 116 extend gradually downward from front to back, respectively, and the pull rod 113 and the swing rod 115 extend gradually upward from front to back; the rotating shaft b is located above the rotating shaft a, the rotating shaft c is located above the rotating shaft d and the rotating shaft f, the rotating shaft f is located above the rotating shaft e, the rotating shaft g is located above the rotating shaft e, and the rotating shaft i is located above the rotating shaft h, the rotating shaft b, the rotating shaft c, and the rotating shaft i are arranged in sequence along the front-to-back direction, and the rotating shaft a, the rotating shaft d, the rotating shaft e, the rotating shaft g, and the rotating shaft h are arranged in sequence along the front-to-back direction.

As shown in Figure 3, the above-mentioned cross-bracing assembly 12 includes a connecting head 121 and two support rods 122 arranged on the left and right sides of the connecting head 121. One end of the support rod 122 is connected to the connecting head 121 for rotation around the k axis, and the other end is connected to a rotating member 123 for rotation around the j axis. The rotating member 123 can be connected to the lower connecting rod 114 relatively rotatably around the axis m of the lower connecting rod 114.

As shown in Figure 4, the child stroller in this embodiment also includes a seat mechanism 4 arranged on the stroller frame 1, which is essentially a soft cloth bag, including a seat 41 and a backrest 42. The front part of the seat 41 is connected to the upper part of the front support rod 111, and the upper part of the backrest 42 is connected to the push rod frame 14.

As shown in Figures 1, 5 and 6, when the cart frame 1 is converted from the unfolded state to the folded state, the locking mechanism is unlocked, the push rod frame 14 slides downward along the rear bracket 13 and folds, and the height of the cart frame 1 in the vertical direction is reduced; the sliding member 16 slides upward along the rear bracket 13, so that the rear part of the pull rod 113 and the rear part of the rear connecting rod 116 are separated from each other, so that the front support rod 111, the connecting rod assembly and the rear connecting rod 116, and the pull rod 113 are folded together and close to the rear bracket 13, and the length of the cart frame 1 in the front and rear direction is reduced; in this process, the linkage connector 121 moves forward, and the two support rods 122 rotate relative to each other and are folded between the side brackets 11 on both sides, and the width of the cart frame 1 in the left and right direction is reduced. As shown in FIG. 6 , when the cart frame 1 is in a folded state, the push rod frame 14 retracts downward into the rear bracket 13, the side brackets 11 on both sides are folded and folded together with the rear bracket 13 and the push rod frame 14, the cross brace assembly 12 is folded and the two groups of side brackets 11 are folded together in the left and right directions, and the entire cart frame 1 is folded in the up and down, front and back, left and right directions, and the final folded size is extremely small.

When the cart frame 1 is converted from the folded state to the unfolded state, the above steps are performed in reverse order, and the cart frame 1 can be unfolded to a normal cart size, which will not be described in detail herein.

Example 2

As shown in FIG7 , the difference between this embodiment and the first embodiment is mainly that the specific arrangement of the stroller frame 1 is different. In this embodiment, the push rod frame 14 has two push rods arranged in parallel with each other, the rear support frame 13 also has two rear support rods 131 arranged in parallel with each other, the sliding member 16 includes two sliding sleeves 161 respectively sleeved on the two rear support rods 131, and a connecting portion 162 connected between the two sliding sleeves 161, and the pull rods 113 on the left and right sides are respectively connected to the sliding sleeves 161 on the same side so as to rotate around the i-axis.

As shown in Fig. 7, in this embodiment, the rotating member 123 of the cross brace assembly 12 can be connected to the upper connecting rod 112 so as to be relatively rotatable around the axis n of the upper connecting rod 112. In fact, the cross brace assembly 12 can be installed on any symmetrical rod to play a rigid supporting role.

As shown in FIG. 7 , the cart frame 1 in this embodiment further includes a pedal 17 , which is disposed between the left and right front support rods 111 and can be folded in the left-right direction.

The folding steps of the cart frame 1 in this embodiment are the same as those in Embodiment 1 and will not be repeated here.

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 (8)

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 the locking mechanical system of shallow frame lock under the expansion state, its characterized in that: the cart frame comprises side brackets which are respectively arranged at the left side and the right side and can be folded respectively, a cross brace component which can be folded along the left and the right direction and is arranged between the two groups of side brackets, a rear bracket which is arranged behind the two groups of side brackets and extends along the up-down direction, and a push rod bracket which extends along the up-down direction and is provided with a handle at the upper part, wherein the side bracket at least comprises a front support rod which extends along the up-down direction and is provided with a front wheel component at the bottom, a rear connecting rod which extends along the front-back direction and is rotationally connected with the lower part of the rear bracket at the rear part, a pull rod which extends along the front-back direction and is connected with the rear support bracket in a relatively rotatable manner and can relatively slide along the up-down direction, and a connecting rod component which is connected between the front support rod and the rear connecting rod and the pull rod, a sliding piece is arranged on the rear support, the rear parts of the pull rods in the side brackets are respectively and rotatably connected to the sliding parts, the front wheel assemblies are arranged below the front parts of the side brackets, the rear parts of the side brackets are connected to the rear brackets, the push rod frames are connected to the rear brackets and can be arranged in a folding manner relative to the rear brackets, when the trolley frame is converted from an unfolding state to a folding state, the rear parts of the pull rods and the rear parts of the rear connecting rods are mutually far away, so that the front support rods, the connecting rod assemblies, the rear connecting rods and the pull rods are mutually folded and are mutually close to the rear brackets, when the trolley frame is in a folding state, the side brackets on the two sides are respectively folded and are mutually close to the rear brackets and the push rod frames, and the transverse support assemblies are folded and enable the two groups of the side brackets to be folded along the left and right directions.

2. The stroller of claim 1, wherein: the connecting rod assembly comprises an upper connecting rod, a lower connecting rod and a swinging rod, wherein the upper connecting rod, the lower connecting rod and the swinging rod extend in the front-back direction respectively, the upper connecting rod is positioned above the lower connecting rod, the front part of the upper connecting rod is rotationally connected with the upper part of the front supporting rod, and the rear part of the upper connecting rod is rotationally connected with the pull rod; the front part of the lower connecting rod is rotationally connected with the front supporting rod, the rear part of the lower connecting rod is rotationally connected with the front part of the swinging rod, the rear part of the swinging rod is rotationally connected to the rear connecting rod, the front part of the pull rod is rotationally connected to the lower connecting rod, and the front part of the rear connecting rod is rotationally connected to the pull rod.

3. The stroller of claim 2, wherein: the trolley frame is in an unfolding state, the upper connecting rod is located above the pull rod, the rear connecting rod is located below the pull rod, and the rear part of the upper connecting rod and the front part of the rear connecting rod are rotationally connected to the pull rod around the same rotating shaft or are rotationally connected to the pull rod through a rotating shaft respectively.

4. The stroller of claim 2, wherein: the trolley frame is in an unfolding state, the front supporting rod gradually extends upwards from front to back, the upper connecting rod, the lower connecting rod and the rear connecting rod respectively extend downwards from front to back, and the pull rod and the swing rod gradually extend upwards from front to back.

5. The stroller of claim 2, wherein: the horizontal bracing assembly comprises a connector and two bracing rods which are respectively arranged at the left side and the right side of the connector, one end part of each bracing rod is rotationally connected with the connector, the other end part of each bracing rod is rotationally connected with a rotating part, the rotating parts can rotate around the axial lead of the lower connecting rod to be relatively rotationally connected with the lower connecting rod, and when the cart frame is converted from an unfolding state to a folding state, the connector moves forwards, and the two bracing rods relatively rotate to be folded between the side brackets at the two sides.

6. The stroller of claim 1, wherein: the rear support is provided with two rear supporting rods which are arranged in parallel, the sliding piece comprises two sliding sleeve parts which are respectively sleeved on the two rear supporting rods, and a connecting part which is connected between the two sliding sleeve parts, and the pull rods on the left side and the right side are respectively connected on the sliding sleeve parts on the same side in a rotating way.

7. The stroller of claim 1, wherein: the child stroller further comprises a seat mechanism arranged on the stroller frame, the seat mechanism is provided with a seat and a backrest, the front part of the seat is connected with the upper part of the front supporting rod, and the upper part of the backrest is connected with the push rod frame.

8. The stroller of any one of claims 1 to 7, wherein: the push rod frame can be connected with the rear bracket in a relatively sliding manner along the length extending direction of the rear bracket.