CN211391415U - Child stroller capable of being converted between single person and double persons - Google Patents

Abstract

The utility model discloses a but children's shallow of one-man and two-man conversion, its shallow frame includes the main frame and sets up the seat subassembly on the main frame, this seat subassembly includes main seat and auxiliary seat, can set up along the relative upset of fore-and-aft direction between main seat and the auxiliary seat, wherein, at least one of these two of main seat and auxiliary seat can be installed on the main frame along the relative upset of fore-and-aft direction, through upset main seat or auxiliary seat, just can make main seat and auxiliary seat relative expansion be set up and make the seat subassembly be the double seat state with setting up one after another, or make main seat and auxiliary seat be one-up distribution and make the seat subassembly be the single seat state, thereby make children's shallow conveniently convert at single car state and double-man car state. The stroller frame of the stroller has the advantages that the number of the rod pieces is small, when the stroller frame is converted to be used as a single stroller, only one seat is reserved for children to take, the whole stroller is light, and convenience is brought to daily use of users.

Description

Stroller that can be converted from single to double

technical field

The utility model relates to a children's stroller which can be converted between single and double.

Background technique

At present, most of the double strollers do not have the function of single-double conversion. When the stroller only needs to push a child, it will be very bulky and inconvenient to use.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a child stroller that can be switched between single and double, so that the child stroller can be easily converted between the single-person vehicle state and the double-person vehicle state.

In order to achieve the above purpose, the technical scheme adopted by the present invention is: a child stroller that can be converted to single and double, including a stroller frame with an unfolded state and a front wheel assembly and a rear wheel set at the bottom of the stroller frame. A wheel assembly, the cart frame includes a main frame and a seat assembly disposed on the main frame, the seat assembly includes a main seat and a subseat, the main seat and the subseat can be along the The front-rear direction is relatively invertible, wherein at least one of the main seat and the sub-seat can be mounted on the main frame in a front-rear direction in a relatively invertible manner, so that the seat assembly has a double seat state and single-seat state, when the seat assembly is in the double-seat state, the main seat and the auxiliary seat are relatively open and arranged in tandem to provide sitting support; when the seat assembly is in the single-seat state In the seat state, the main seat and the sub-seat are arranged one above the other to form one seat.

According to a preferred solution of the present utility model, the main frame includes:

a front bracket, the front wheel assembly is arranged at the bottom of the front bracket;

a rear bracket, the rear wheel assembly is arranged at the bottom of the rear bracket, and the upper part of the rear bracket is connected to the upper part of the front bracket in a relatively rotatable and relatively slidable direction along the front-rear direction;

putter;

an upper link, one end of the upper link is rotatably connected to the upper part of the rear bracket and the other end of the upper link is rotatably connected to the push rod;

a rear link extending in the up-down direction, the upper part of the rear link is rotatably connected to the push rod, and the lower part of the rear link is rotatably connected to the rear bracket;

The front part of the main seat is rotatably connected to the front bracket, the rear part of the main seat is rotatably connected to the front part of the auxiliary seat, and the upper link rotates with the auxiliary seat through a rotating shaft connected, the sub-seat is flipped back and forth about the rotation axis so that the seat assembly is converted between the single-seat state and the double-seat state.

Further, the rear part of the main seat and the front part of the auxiliary seat are rotatably connected by a rotating shaft, and when the seat assembly is in a two-seat state, the rotating shaft is located on the auxiliary seat on the The rear of the rotating shaft.

Further, the upper link includes a link rod body extending in the front-rear direction, the link rod body is rotatably connected between the upper part of the rear bracket and the push rod, and the upper link further includes a self- The connecting rod body extends downward from the connecting rod body, and the lower part of the connecting rod body is rotatably connected with the auxiliary seat.

As a specific embodiment, the connecting rod body extends downward and obliquely backward from the front part of the connecting rod rod body, and the rear support includes two rear supports which are respectively arranged on the left and right sides and both extend in the up-down direction. When the cart frame is in the unfolded state, the connecting rod body is located between the two rear support rods in the left-right direction, and the connecting rod body and the rear support rod are parallel to each other.

Further, the front bracket includes a front support rod body extending in the up-down direction and a sliding rod extending backward from the upper part of the front support rod body, and the upper link at least includes a link rod body extending in the front-rear direction, The connecting rod body is rotatably connected between the upper part of the rear bracket and the push rod, and the sliding rod and the connecting rod body are arranged so as to be slidable and telescopic along the lengthwise extending direction of the sliding rod.

Further, when the auxiliary seat is turned back and forth relative to the main seat, so that the seat assembly is converted between the single seat state and the double seat state, the upper part of the rear bracket is connected to the front bracket. The upper parts of the wheels slide relative to each other in the front-rear direction, and the distance between the front wheel assembly and the rear wheel assembly in the front-rear direction changes.

Further, when the seat assembly is in the single-seat state or the double-seat state, the cart frame can be folded, and when the cart frame is in the folded state, the push rod is folded in the At the rear of the rear bracket, the front bracket, the rear bracket and the push rod are mutually folded in the front-rear direction.

According to another preferred solution of the present invention, the main frame includes:

a front bracket, the front wheel assembly is arranged at the bottom of the front bracket;

The rear bracket, the rear wheel assembly is arranged at the bottom of the rear bracket, the upper part of the rear bracket is rotatably connected with a first sliding piece, and the first sliding piece can slide up and down along the length extending direction of the front bracket is arranged on the front bracket;

a swing rod extending in the up-down direction, the upper part of the swing rod is rotatably connected to the first sliding piece or the upper part of the rear bracket, and the lower part of the swing rod is rotatably connected to the on the main seat;

The front bracket is rotatably provided with a second sliding piece, the second sliding piece can be slidably connected to the main seat forward and backward along the length extending direction of the main seat, and the auxiliary seat is rotatably connected through a rear rotating shaft On the rear bracket, the auxiliary seat is turned back and forth around the rear pivot shaft to allow the seat assembly to switch between the single-seat state and the double-seat state.

Further, when the auxiliary seat is turned back and forth relative to the main seat so that the seat assembly is converted between the single seat state and the double seat state, the first sliding member moves along the front bracket. The main seat slides up and down, and the main seat slides back and forth along the second sliding member, and the distance between the front wheel assembly and the rear wheel assembly in the front-rear direction changes.

Further, the lower part of the swing rod is rotatably connected to the main seat through a lower rotating shaft, and when the seat assembly is in a single-seat state, the second sliding member is located on the lower rotating shaft on the main seat When the seat assembly is in a double seat state, the second sliding member is located behind the lower rotating shaft on the main seat.

Preferably, the main frame at least includes a front bracket with the front wheel assembly at the bottom and a rear bracket with the rear wheel assembly at the bottom. When the seat assembly is converted from a two-seat state to the single-seat state At the time, the distance between the front wheel assembly and the rear wheel assembly in the front-rear direction decreases.

Preferably, the sub-seat is disposed on the main frame so as to be able to be flipped relative to each other, and when the seat assembly is in the single-seat state, the sub-seat is flipped over and stacked under the main seat.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art:

In the child stroller that can be converted to single and double of the utility model, the main seat and the auxiliary seat in the seat assembly are rotatably connected so that the two can be set up in a reversed manner, and the main seat and the auxiliary seat are arranged in a rotatable manner. At least one of them can be set on the main frame of the stroller frame so as to be able to be flipped in the front-rear direction, so that by flipping the main seat or the sub-seat, the main seat and the sub-seat can be relatively unfolded and arranged in tandem to provide Each provides sitting support so that the seat assembly is in a two-seat state, or the main seat and the sub-seat are distributed one-on-one so that the seat assembly is in a single-seat state, so that the stroller can be conveniently used in a single-occupant state and a single-seat state. Double car status to be converted. The stroller frame of the children's stroller has a small number of rods, and only one seat is reserved for children to ride when it is converted into a single-person vehicle, and the whole vehicle is light and convenient for daily use by users.

Description of drawings

1 is a perspective view of the stroller of Embodiment 1 in an unfolded state, wherein the seat assembly is in a two-seat state;

Accompanying drawing 2 is the perspective view of the stroller of accompanying drawing 1 from another perspective;

Figure 3 is a side view of the stroller of Figure 1;

Accompanying drawing 4 is the schematic diagram of the use state of the stroller of accompanying drawing 1;

5 is a perspective view of the stroller of Embodiment 1 in an unfolded state, wherein the seat assembly is in a single-seat state;

Figure 6 is a side view of the stroller of Figure 5;

Accompanying drawing 7 is the schematic diagram of the use state of the stroller of accompanying drawing 5;

8 is a schematic diagram of the conversion process of the seat assembly in the stroller according to Embodiment 1 being converted from a two-seat state to a single-seat state;

Figure 9 is a side view of the stroller of Figure 1 in a folded state;

Figure 10 is a side view of the stroller of Figure 5 in a folded state;

11 is a perspective view of the stroller of Embodiment 2 in an unfolded state, wherein the seat assembly is in a single-seat state;

Figure 12 is a side view of the stroller of Figure 11;

13 is a schematic diagram of the transition process of the seat assembly in the stroller of Embodiment 2 from a single-seat state to a double-seat state;

14 is a perspective view of the stroller of Embodiment 2 in an unfolded state, wherein the seat assembly is in a double seat state;

Among them: 1. Front bracket; 11. Front strut body; 12. Slide bar; 13. Front pedal; 14. Front armrest; 15. Front strut; 2. Rear bracket; 21. Rear strut; 22. Rear pedal ;3, seat assembly; 31, main seat; 31a, front seat panel; 31b, front seat tube; 32, auxiliary seat; 33, rotation shaft; 34, backrest bar; 35, matching groove; ;4, push rod; 5, upper connecting rod; 51, connecting rod body; 52, connecting rod body; 6, rear connecting rod; 7, swing rod; 71, lower shaft; 8, first sliding piece; 9, second Slider; 10. Front wheel assembly; 20. Rear wheel assembly.

Detailed ways

The technical solutions of the present utility model will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

Example 1

Referring to Figures 1 to 10, a single-double convertible children's stroller includes a stroller frame with an unfolded state, a front wheel assembly 10 and a rear wheel assembly 20 provided at the bottom of the stroller, and a stroller for placing A locking mechanism for locking the stroller frame in the deployed state, the stroller frame including a main frame and a seat assembly 3 provided on the main frame. The front wheel assembly 10 and the rear wheel assembly 20 are arranged at the bottom of the main frame; the seat assembly 3 includes a main seat 31 and a sub-seat 32, and the main seat 31 and the sub-seat 32 are rotatably connected so as to be arranged in a reversed manner, wherein, One of the main seat 31 and the sub-seat 32 can be mounted on the main frame so as to be able to be inverted relative to each other, so that the seat assembly 3 has a two-seat state and a single-seat state. When the seat assembly 3 is in the two-seat state, the main seat 31 and the auxiliary seat 32 are relatively open to provide sitting support respectively, so that the stroller can be used as a double car; when the seat assembly 3 is in a single-seat state, the main seat 31 and the auxiliary seat 32 are arranged one above the other to form a Seat so that the stroller can be used as a single vehicle.

In this embodiment, the main seat 31 and the sub-seat 32 can be arranged to be reversed relative to each other in the front-rear direction. When the seat assembly is in a two-seat state, the main seat 31 and the sub-seat 32 are arranged in tandem, as shown in FIGS. 1 to 1 . As shown in FIG. 3 ; when the seat assembly 3 is in a single-seat state, the main seat 31 and the auxiliary seat 32 are arranged one above the other to form a seat, as shown in FIGS. 5 to 7 .

In this embodiment, the rear part of the main seat 31 and the front part of the auxiliary seat 32 are rotatably connected by a rotating shaft 33, and the auxiliary seat 32 can be set on the main frame so as to be able to be reversed relative to each other. When the seat assembly 3 is in a single-seat state When the sub-seat 32 is turned upside down and stacked under the main seat 31, only the main seat 31 provides the child's sitting support.

1 to 10, in this embodiment, the main frame includes:

Front bracket 1, the front wheel assembly 10 is arranged at the bottom of the front bracket 1;

The rear bracket 2, the rear wheel assembly 20 is arranged on the bottom of the rear bracket 2, and the upper part of the rear bracket 2 is connected with the upper part of the front bracket 1 in a relatively rotatable and relatively slidable direction along the front-rear direction;

putter 4;

an upper link 5, one end of the upper link 5 is rotatably connected to the upper part of the rear bracket 2 and the other end of the upper link 5 is rotatably connected to the push rod 4;

The rear link 6 extends in the up-down direction, the upper part of the rear link 6 is rotatably connected to the push rod 4, and the lower part is rotatably connected to the rear bracket 2;

The front part of the main seat 31 is rotatably connected to the front bracket 1, and the upper link 5 is rotatably connected to the auxiliary seat 32 through the rotating shaft 36. The auxiliary seat 32 is turned back and forth around the rotating shaft 36 so that the seat assembly 3 is in a single seat state and Convert between two-seat states.

When setting, the axis lines of the above-mentioned rotating shaft 36 and the rotating shaft 33 are parallel to each other. When the seat assembly 3 is in the double seat state, the rotating shaft 36 is located behind the rotating shaft 33 on the auxiliary seat 32; when the seat assembly 3 is converted into In the single-seat state, the rotating shaft 36 is located in front of the rotating shaft 33 when the auxiliary seat 32 is turned over. The bottom of the main seat 31 is also provided with a receiving cavity. When the seat assembly 3 is in a single seat state, the auxiliary seat 32 is received in the above-mentioned receiving cavity, as shown in FIG. 5 . The bottom of the main seat 32 is also provided with a matching groove 35 for the rotating shaft 36 to be accommodated therein.

When the sub seat 32 is flipped back and forth about the rotation axis 36 relative to the main seat 31 so that the seat assembly 3 is switched between the single seat state and the double seat state, the upper part of the rear bracket 2 and the upper part of the front bracket 1 are in the front-rear direction. Relatively sliding, so that the distance between the front bracket 1 and the rear bracket 2 in the front-rear direction increases or decreases, so as to adapt to the length of a single seat or the length of two seats, the front wheel assembly 10 and the rear wheel assembly 20 follow along. The distance in the front and rear directions changes to maintain a stable support for the main frame as a whole.

1 to 7 , the upper link 5 includes a link rod body 51 extending in the front-rear direction, the link rod body 51 is rotatably connected between the upper part of the rear bracket 2 and the push rod 4, and the upper link 5 also It includes a connecting rod body 52 extending downward from the link rod body 51 , and the lower part of the connecting rod body 52 is rotatably connected with the auxiliary seat 32 through the rotating shaft 36 . Specifically, the connecting rod body 52 extends downward and obliquely backward from the front part of the connecting rod rod body 51 , and the rear bracket 2 includes two rear support rods 21 which are respectively arranged on the left and right sides and both extend in the up and down direction. When the frame is in the unfolded state, the connecting rod body 52 and the rear support rod 21 are parallel to each other, and the connecting rod body 52 is located between the rear support rods 21 on both sides in the left-right direction, and the connecting rod body 52 cannot be seen from the side of the cart frame. , which makes the cart frame look more compact when unfolded.

The front bracket 1 includes two groups of front struts that are arranged on the left and right sides, and each group of front struts includes a front strut rod body 11 extending in the up-down direction and a sliding rod 12 extending backward from the upper part of the front strut rod body 11. A set of front wheel assemblies 10 are respectively provided at the bottom of the side front strut rod bodies 11 . The front armrests 14 are fixedly arranged between the upper parts of the front support rod bodies 11 on both sides, and the front footrests 13 are fixedly arranged between the lower parts of the front support rod bodies 11 on both sides, so as to provide children sitting on the main seat 31 with a Foot support. The rear bracket 2 also includes a rear footrest 22 fixedly arranged between the lower parts of the rear struts 21 on both sides to provide foot support for children sitting on the auxiliary seat 32. The lower part of each rear strut 21 is provided with a footrest. Set rear wheel assembly 20 .

The upper connecting rod 5 , the rear connecting rod 6 and the push rod 4 are all provided with two groups which are respectively arranged on the left and right sides, and the push rods 4 on both sides here are integrally arranged in a U-shape with an opening facing downward. On the left and right sides of the cart frame, the rear connecting rod 6 is connected between the push rod 4 and the rear support rod 21; the two sets of upper connecting rods 5 are located between the two sets of rear support rods 21 along the left and right directions; The front part of the connecting rod body 51 is rotatably connected to the upper part of the rear support rod 21, the rear part of the connecting rod rod body 51 is rotatably connected to the push rod 4, and the sliding rod 12 in the front support rod and the connecting rod rod body 51 can be along the sliding rod 12. The length of the extension direction is sliding and telescopic. Here, the connecting rod body 51 has a hollow rod cavity, and the rear part of the sliding rod 12 is slidably passed through the hollow rod cavity of the connecting rod rod body 51, so that the sliding telescopic connection between the sliding rod 12 and the connecting rod rod body 51 is made, and The upper part of the rear bracket 2 and the upper part of the front bracket 1 are slidably connected in the front-rear direction.

1 to 10 , the seat assembly 3 further includes a backrest bar 34 rotatably provided at the rear of the main seat 31 , where the lower part of the backrest bar 34 is rotatably arranged around the rotation axis 33 and can be used to provide sitting and standing Children on the main seat 31 or the sub-seat 32 are supported on their backs.

Referring to FIG. 8 , it is a schematic diagram of the process of converting the stroller of the present embodiment from a double-seat vehicle to a single-seat vehicle, that is, the seat assembly 3 is converted from a double-seat state to a single-seat state, wherein, during the changeover, the auxiliary seat 32 is rotated around The shaft 36 is turned downwards, gradually folded towards the bottom of the main seat 31, and at the same time, the front bracket 1 and the rear bracket 2 are slid relative to each other in the front-rear direction to reduce the distance, until the auxiliary seat 32 is stacked on the bottom of the main seat 31, and the conversion Completed, the overall size of the cart frame is also much smaller in the single-car state than in the two-car state, and the implementation is lighter and labor-saving. When the stroller needs to be converted from a single-person vehicle to a double-person vehicle, it is only necessary to turn the auxiliary seat 32 backward to expand it relative to the main seat 31, and at the same time, make the rear bracket 2 slide backward relative to the front bracket 1 to increase the distance. to complete the conversion. The operation is very simple and convenient.

Referring to FIGS. 9 and 10 , the stroller frame of the present embodiment can be folded no matter whether it is in a single-occupant state or a double-seat state, that is, when the seat assembly 3 is in a single-seat state or a double-seat state . When the seat assembly 3 is in a two-seat state, and the cart frame is in a folded state, as shown in FIG. The front and rear directions are mutually folded, and the sliding rod 12 and the link rod body 51 are in a relatively elongated state, so that there is a gap between the front bracket 1 and the rear bracket 2, and the main seat 31 and the auxiliary seat 32 are kept in a relatively unfolded state and are folded in each rod. between pieces. When the seat assembly 3 is in a single-seat state and the cart frame is in a folded state, as shown in FIG. 10 , the main seat 31 and the auxiliary seat 32 are stacked, and the sliding rod 12 and the link rod body 51 are in a relatively retracted state. The rod 4 is folded behind the rear bracket 2 , the front bracket 1 , the rear bracket 2 , and the push rod 4 are folded together in the front-rear direction, and the front bracket 1 and the rear bracket 2 are rotated to be close to each other. Regardless of whether the stroller is in a single-person vehicle state or a double-person vehicle state, during the folding operation, the push rod 4 only needs to be turned backward after the stroller frame is unlocked, so that the rods of the stroller frame can rotate relative to each other. And to achieve folding, the operation is very convenient.

Example 2

11 to 14 , a child stroller that can be converted to a single or two persons, the seat assembly 3 in the child stroller, which is similar to Embodiment 1, is also provided by the auxiliary seat 32 that can be flipped forward and backward The main difference between this embodiment and Embodiment 1 is that the main frame is arranged in different forms, as follows.

In this embodiment, the main frame includes:

Front bracket 1, the front wheel assembly 10 is arranged at the bottom of the front bracket 1;

The rear bracket 2, the rear wheel assembly 20 is arranged at the bottom of the rear bracket 2, the upper part of the rear bracket 2 is rotatably connected with a first sliding member 8, and the first sliding member 8 can slide up and down along the length extending direction of the front bracket 1. set on the front bracket 1;

The swing rod 7 extends in the up-down direction, the upper part of the swing rod 7 is rotatably connected to the first sliding member 8 or the upper part of the rear bracket 2 , and the lower part of the swing rod 7 is rotatably connected to the main seat 31 ;

The front bracket 1 is also rotatably provided with a second sliding member 9, the second sliding member 9 can be slidably connected to the main seat 31 forward and backward along the longitudinal extension direction of the main seat 31, and the auxiliary seat 32 is rotatably connected to the main seat 31 through the rear rotating shaft 37. on the rear bracket 2. The auxiliary seat 32 is turned back and forth around the rear rotating shaft 37 so that the seat assembly 3 can be switched between a single seat state and a double seat state.

When setting, the axis lines of the above-mentioned rear rotating shaft 37 and the rotating shaft 33 are parallel to each other. When the seat assembly 3 is in a two-seat state, the rotating shaft 33 is located at the rear of the rotating shaft 33 on the auxiliary seat 32; when the seat assembly 3 is converted In the single-seat state, the rotating shaft 33 is located in front of the rotating shaft 33 along with the sub-seat 32 being turned over.

Specifically, the front bracket 1 includes two front struts 15 arranged on the left and right sides. In this embodiment, the front struts 15 on both sides are integrally arranged to form a U-shape with an opening facing downward. The upper part also acts as a push rod. The rear bracket 2 includes two rear struts 21 arranged on the left and right sides, the swing rod 7 is provided with two groups arranged on the left and right sides, and the seat assembly 3 is arranged on the front struts 11 on both sides, the rear struts 21 on both sides and Between the swing bars 7 on both sides.

On the left and right sides of the cart frame, the first sliding member 8 adopts the first sliding sleeve 8 that is slidably sleeved on the front support rod 15, and the upper part of the swing rod 7 and the upper part of the rear support rod 21 pass through the same rotating shaft. It is rotatably connected to the first sliding sleeve 8 . The main seat 31 includes a front seat tube 31b disposed on the left and right sides and extending in the front-rear direction, and a front seat plate 31a fixed on the front seat tubes 31b on both sides. Front swivel connection. The second sliding member 9 is a second sliding sleeve 9 slidably sleeved on the front seat tube 31 b , and the lower part of the swing rod 7 is rotatably connected to the front seat plate 31 a through the lower shaft 71 .

11 and 12 , when the stroller is in a single-person vehicle state, that is, when the seat assembly 3 is in a single-seat state, the auxiliary seat 32 is folded under the main seat 31 , and the swing bar 7 is located at the bottom of the front support rod 11 . In the rear, the second sliding sleeve 9 is located in front of the lower rotating shaft 71 on the main seat 31; when the stroller is in a double car state, that is, when the seat assembly 3 is in a double seat state, as shown in FIG. 14, the lower end of the swing rod 7 swings To the front side of the front strut 11 , the second sliding sleeve 9 is located behind the lower rotating shaft 71 on the main seat 31 .

Referring to FIG. 13 , when the stroller is converted from a single-person vehicle to a double-person vehicle, the seat assembly 3 is converted from a single-seat state to a double-seat state, and the auxiliary seat 32 is turned backward around the rear rotating shaft 37 to make it phase. With the gradual unfolding of the main seat 31 , under the action of the front support rod 11 and the rear support rod 21 , the first sliding sleeve 8 gradually slides downward along the front support rod 11 , and the front seat tube 31 b of the main seat 31 slides along the second sliding sleeve 9 . Slide forward, so that the distance between the front support rod 11 and the rear support rod 21 in the front-rear direction gradually increases, so as to adapt to the distribution of the main seat 31 and the auxiliary seat 32 in tandem. At the same time, the rear support rod 21 is relatively The rod 11 is rotated, so that the distance between the front wheel assembly 10 and the rear wheel assembly 20 in the front-rear direction is also increased, so as to maintain stable support for the main frame. On the contrary, when the child is proposed to be converted from a double car to a single car, the sub seat 32 can be turned down to be gradually folded to the bottom of the main seat 31, and the conversion operation is also very convenient. In particular, when used as a single-person vehicle, the overall size is reduced, and the implementation is more convenient.

Not shown, the stroller of the present embodiment can be folded even in a single-car state or a two-car state. When folded, the first sliding sleeve 8 slides up along the front support rod 1 , so that the front support 1 , the rear support 2 and the swing rod 7 are folded together, and the seat assembly 3 is folded between the front support 1 and the rear support 2 .

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the technology to understand the content of the present invention and implement accordingly, and cannot limit the protection scope of the present invention with this. All equivalent changes or modifications made according to the spirit of the present invention shall be included within the protection scope of the present invention.

Claims (13)

1. A child stroller that can be converted to single and double, comprising a stroller frame with an unfolded state and a front wheel assembly and a rear wheel assembly disposed at the bottom of the stroller frame, wherein the stroller is characterized in that: The frame includes a main frame and a seat assembly arranged on the main frame, the seat assembly includes a main seat and a sub-seat, the main seat and the sub-seat can be relatively inverted along the front-rear direction, wherein , at least one of the main seat and the sub-seat can be mounted on the main frame so as to be relatively inverted in the front-rear direction, so that the seat assembly has a two-seat state and a single-seat state. When the seat assembly is in a two-seat state, the main seat and the auxiliary seat are relatively open and arranged in tandem to provide sitting support; when the seat assembly is in a single-seat state, the main seat One seat is formed by being placed one on top of the other with the sub-seat. 2. The stroller according to claim 1, wherein the main frame comprises: a front bracket, the front wheel assembly is arranged at the bottom of the front bracket; a rear bracket, the rear wheel assembly is arranged at the bottom of the rear bracket, and the upper part of the rear bracket is connected to the upper part of the front bracket in a relatively rotatable and relatively slidable direction along the front-rear direction; putter; an upper link, one end of the upper link is rotatably connected to the upper part of the rear bracket and the other end of the upper link is rotatably connected to the push rod; a rear link extending in the up-down direction, the upper part of the rear link is rotatably connected to the push rod, and the lower part of the rear link is rotatably connected to the rear bracket; The front part of the main seat is rotatably connected to the front bracket, the rear part of the main seat is rotatably connected to the front part of the auxiliary seat, and the upper link rotates with the auxiliary seat through a rotating shaft connected, the sub-seat is flipped back and forth about the rotation axis so that the seat assembly is converted between the single-seat state and the double-seat state. 3. The single-double convertible stroller according to claim 2, wherein the rear part of the main seat and the front part of the auxiliary seat are rotatably connected by a rotating shaft, when the seat assembly In the double seat state, the rotation shaft is located behind the rotation shaft on the sub-seat. 4 . The child stroller capable of single-double conversion according to claim 2 , wherein the upper link comprises a link rod body extending in the front-rear direction, and the link rod body is rotatably connected to the rear Between the upper part of the bracket and the push rod, the upper link further includes a connecting rod body extending downward from the link rod body, and the lower part of the connecting rod body is rotatably connected with the auxiliary seat. 5 . The child stroller capable of single-double conversion according to claim 4 , wherein the connecting rod body extends downward and backward from the front part of the connecting rod rod body, and the rear bracket comprises: Two rear struts on the left and right sides extending in the up and down direction, when the cart frame is in the unfolded state, the connecting rod body is located between the two rear struts along the left and right directions, and the connection The rod body and the rear support rod are parallel to each other. 6 . The stroller according to claim 2 , wherein the front bracket comprises a front support rod body extending in an up-down direction and a front support rod body extending backward from the upper part of the front support rod body. 7 . A sliding rod, the upper link at least includes a link rod body extending in the front-rear direction, the link rod body is rotatably connected between the upper part of the rear bracket and the push rod, and the sliding rod is connected to the connecting rod. The rod bodies are slidably and telescopically arranged along the lengthwise extending direction of the sliding rod. 7 . The stroller according to claim 2 , wherein the auxiliary seat is flipped back and forth relative to the main seat so that the seat assembly is in the single seat state and the double seat state. 8 . During the transition between the states, the upper part of the rear bracket and the upper part of the front bracket slide relatively in the front-rear direction, and the distance between the front wheel assembly and the rear wheel assembly in the front-rear direction changes. 8 . The stroller of claim 2 , wherein when the seat assembly is in a single-seat state or the double-seat state, the stroller frame can be folded, and when the seat assembly is in the single-seat state or the double-seat state When the cart frame is in a folded state, the push rod is folded behind the rear bracket, and the front bracket, the rear bracket and the push rod are folded together in the front-rear direction. 9 . The child stroller that can be converted to a single or double according to claim 1 , wherein the main frame comprises: 10 . a front bracket, the front wheel assembly is arranged at the bottom of the front bracket; The rear bracket, the rear wheel assembly is arranged at the bottom of the rear bracket, the upper part of the rear bracket is rotatably connected with a first sliding piece, and the first sliding piece can slide up and down along the length extending direction of the front bracket is arranged on the front bracket; a swing rod extending in the up-down direction, the upper part of the swing rod is rotatably connected to the first sliding piece or the upper part of the rear bracket, and the lower part of the swing rod is rotatably connected to the on the main seat; The front bracket is rotatably provided with a second sliding piece, the second sliding piece can be slidably connected to the main seat forward and backward along the length extending direction of the main seat, and the auxiliary seat is rotatably connected through a rear rotating shaft On the rear bracket, the auxiliary seat is turned back and forth around the rear pivot shaft to allow the seat assembly to switch between the single-seat state and the double-seat state. 10 . The stroller according to claim 9 , wherein the auxiliary seat is flipped back and forth relative to the main seat so that the seat assembly is in the single seat state and the dual seat state. 11 . During the transition between states, the first sliding member slides up and down along the front bracket, and the main seat slides back and forth along the second sliding member, and the gap between the front wheel assembly and the rear wheel assembly is The distance in the front-to-rear direction changes. 11. The stroller according to claim 9, wherein the lower part of the swing rod is rotatably connected to the main seat through the lower shaft, when the seat assembly is in a single seat state When the seat assembly is in a double seat state, the second sliding member is located in front of the lower hinge on the main seat; when the seat assembly is in a double seat state, the second sliding member is located on the main seat on the lower hinge. the rear. 12 . The stroller according to claim 1 , wherein the main frame at least comprises a front bracket with the front wheel assembly at the bottom and a rear wheel assembly at the bottom. 12 . In the rear bracket, when the seat assembly is converted from the two-seat state to the single-seat state, the distance between the front wheel assembly and the rear wheel assembly in the front-rear direction decreases. 13 . The child stroller that can be converted to a single and a double according to any one of claims 1 to 12 , wherein the auxiliary seat is arranged on the main frame so as to be able to be turned relative to one another, and when the seat assembly is in the In the single-seat state, the auxiliary seat is turned over and stacked under the main seat.

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