CN213831847U - Children's barrow - Google Patents

Abstract

The utility model discloses a children's shallow, including the lower push rod, the last push rod of sliding on establishing the lower push rod, with the lower push rod rotate and sliding connection's end bracket component and the locking bottom bracket component and the locking mechanical system of lower push rod position, locking mechanical system is including rotating or sliding the locking piece of establishing on one of lower push rod and end bracket component two and establishing the locked groove on another, the locking piece has the sticking department, locking mechanical system is when locking state, sticking department and locked groove cooperation, locking mechanical system is when unlocking state, the sticking department breaks away from the locked groove, the locking piece still has the unlocking portion, the unlocking portion can cooperate with the last push rod, children's shallow is when expansion state, the unlocking portion breaks away from the upper push rod, when the upper push rod slides to its and unlocking portion cooperation, can order about the locking piece to rotate or slide and make the locking department break away from the locked groove. When the child stroller is folded, the locking mechanism can be unlocked only by enabling the upper push rod to slide downwards, independent operation is not needed, the mode for driving the locking mechanism to unlock is simple, and production and manufacturing are facilitated.

Description

Children's barrow

Technical Field

The utility model relates to a children's articles for use technical field, concretely relates to children's shallow.

Background

The child stroller provides great convenience for adults to carry small children for outdoor activities, so that the child stroller gradually becomes a necessity for adults to carry children for outdoor activities. In order to facilitate the carrying and storage of the stroller, the stroller frame of the stroller can be folded. Stroller frames generally include a locking mechanism for locking the stroller in the unfolded state, and in the prior art, when the structure of the stroller frame is complicated, a plurality of locking mechanisms are usually required to lock the stroller frame in the unfolded state. In the prior art, some stroller needs to unlock each locking mechanism independently, which is inconvenient for folding operation of the stroller; and part of locking mechanisms of part of the child stroller do not need to be unlocked independently, linkage unlocking can be realized in the folding process of part of rod pieces of the child stroller, but the structure for realizing linkage unlocking is complex, and the production and manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a modified children's shallow to not enough among the prior art.

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

a children's barrow, having unfolding and folding state, the children's barrow includes push-down rod, can follow the push-down rod length extending direction set up push-up rod on the push-down rod with sliding, with push-down rod rotate and sliding connection's bottom bracket component and be used for with the locking mechanical system of bottom bracket component with the relative position locking of push-down rod, locking mechanical system is including can rotate or sliding set up the locking piece on push-down rod and one of two parts of bottom bracket component and set up on the other part of push-down rod and two parts of bottom bracket component with locking piece matched with lock groove, the locking piece has the locking portion, when locking mechanical system is in locking state, the locking portion with lock groove cooperatees, when locking mechanical system is in unlocking state, the locking portion with the cooperation between the lock groove is disengaged, the locking piece still has the unblock portion, the unblock portion can with the upper push rod cooperatees, when children's shallow is in the development condition, the unblock portion with cooperation between the upper push rod is disengaged, when the upper push rod is relative the lower push rod slides the upper push rod with when the unblock portion cooperatees, can drive the locking piece rotates or slides and makes the locking portion with cooperation between the locked groove is disengaged.

Preferably, the unlocking part can be matched with the lock groove, when the locking mechanism is in a locking state, the unlocking part is disengaged from the lock groove, when the locking part rotates or slides relatively to enable the locking part to be disengaged from the lock groove, the unlocking part is matched with the lock groove, and the lower push rod slides relatively to the bottom bracket to drive the unlocking part to be disengaged from the lock groove.

Preferably, the lower part of the upper push rod is provided with a first inclined surface, the unlocking part is a second inclined surface which is arranged on the locking part and matched with the first inclined surface, when the stroller is in an unfolded state, the first inclined surface is far away from the second inclined surface, and when the upper push rod slides to the first inclined surface and the second inclined surface are abutted, the locking part can be driven to rotate relatively or slide to enable the locking part to be disengaged from the locking groove in a matching manner.

Preferably, the locking mechanism further comprises an elastic member for urging the locking member to return from the unlocked state to the locked state, the elastic member being disposed between the locking member and one of the lower push rod and the bottom bracket assembly.

Preferably, the bottom bracket assembly includes a front bracket for mounting a front wheel assembly, a rear bracket for mounting a rear wheel assembly, a slider slidably disposed on the lower push rod in a length extending direction of the lower push rod, an upper portion of the front bracket and an upper portion of the rear bracket rotatably connected to the slider, respectively, a front portion of the front basket lever rotatably connected to a lower portion of the front bracket, a rear portion of the rear basket lever rotatably connected to a lower portion of the rear bracket, two of the three lower components of the front basket lever, the rear portion of the rear basket lever and the lower basket lever rotatably connected to each other, a third component rotatably connected to any one of the two components, or the same shaft thereof.

Further, the bottom bracket component also comprises a seat rod and a connecting rod, the rear part of the seat rod is rotationally connected with the lower push rod, one end part of the connecting rod is rotationally connected with the seat rod, and the other end part of the connecting rod is rotationally connected with the front basket rod.

Further, the bottom bracket assembly further comprises a roller which is rotatably arranged on the sliding piece, and the lower push rod is in rolling contact with the roller.

Preferably, the bottom bracket assembly comprises a front bracket for mounting a front wheel assembly, a rear bracket for mounting a rear wheel assembly, and a vertical rod, the lower push rod is slidably disposed on the front bracket along a length extending direction of the front bracket, an upper portion of the rear bracket is rotatably connected with a lower portion of the lower push rod, one end of the vertical rod is rotatably connected with an upper portion of the front bracket, and the other end of the vertical rod is rotatably connected with the rear bracket.

Further, the base support assembly further comprises a seat plate, a front support rod and a rear support rod, the front support rod and the rear support rod are used for supporting the seat plate, the front support rod is fixedly arranged on the front support, the rear support rod is rotatably connected with the rear support, and the seat plate is respectively rotatably connected with the front support rod and the rear support rod.

Preferably, the locking mechanism is capable of locking the chassis assembly in a deployed state.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a children's shallow is when folding, as long as make the locking unblock back between push up rod and the lower push rod, the push up rod lapse can make the unlocking of locking mechanical system, need not the independent operation like this and make the unlocking of locking mechanical system, and the drive mode of drive locking mechanical system unblock is simple moreover, makes things convenient for children's shallow's manufacturing, can practice thrift manufacturing cost.

Drawings

Fig. 1 is a perspective view of the stroller of the present invention in an unfolded state (embodiment 1);

fig. 2 is an exploded view of the stroller of the present invention (example 1);

fig. 3 is a schematic structural view of a sliding member portion of the stroller of the present invention (embodiment 1);

fig. 4 is an exploded view of a sliding member portion of the stroller of the present invention (embodiment 1);

fig. 5 is a side sectional view of the stroller of the present invention in a deployed state (embodiment 1, the locking mechanism is in a locked state);

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

fig. 7 is a side sectional view of the stroller of the present invention during the folding process (embodiment 1, the upper push rod slides downward to match with the unlocking part);

FIG. 8 is an enlarged view of a portion of FIG. 7 at B;

fig. 9 is a side sectional view of the stroller of the present invention during folding (in example 1, the upper push rod slides downward until the locking portion is disengaged from the locking groove, and the unlocking portion is engaged with the locking groove);

FIG. 10 is an enlarged view of a portion of FIG. 9 at C;

fig. 11 is a side sectional view of the stroller of the present invention during folding (in example 1, the upper push rod slides downward in place, the locking portion is disengaged from the locking groove, and the unlocking portion is engaged with the locking groove);

FIG. 12 is an enlarged view of a portion of FIG. 11 at D;

fig. 13 is a side sectional view of the stroller of the present invention in an unfolded state (in example 1, the upper push rod and the lower push rod slide downward at the same time, the locking member is completely separated from the locking groove, and the locking mechanism is unlocked);

FIG. 14 is an enlarged fragmentary view at E in FIG. 13;

fig. 15 is a side sectional view of the stroller of the present invention in a folded state (example 1);

fig. 16 is a side view of the stroller of the present invention in a folded state (example 1);

fig. 17 is a perspective view of the stroller of the present invention in an unfolded state (embodiment 2);

fig. 18 is a side view of the stroller of the present invention in an expanded state (example 2);

FIG. 19 is a partially enlarged view (inner structure view) of FIG. 18 at F;

fig. 20 is a side view of the stroller of the present invention during folding (example 2);

fig. 21 is a second side view (example 2) of the stroller of the present invention during folding;

fig. 22 is a side view of the stroller of the present invention in a folded state (example 2).

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-22, the stroller of the present invention comprises a stroller frame, a front wheel assembly 4 disposed at the front portion of the bottom of the stroller frame, and a rear wheel assembly 5 disposed at the rear portion of the bottom of the stroller frame.

The cart frame comprises a bottom bracket component 1 and a push rod component 2 arranged on the bottom bracket component 1.

The push rod assembly 2 includes a lower push rod 21 and an upper push rod 22, and the upper push rod 22 is slidably provided on the lower push rod 21 in a length extending direction of the lower push rod 21. In this embodiment, the lower push rod 21 has a lumen extending along the length direction thereof, and the upper push rod 22 is partially located in the lumen of the lower push rod 21 and slidably disposed along the length extending direction of the lumen.

The lower push rod 21 can be arranged to rotate and slide relative to the bottom bracket assembly 1, and the stroller further comprises a locking mechanism for locking the relative positions of the lower push rod 21 and the bottom bracket assembly 1.

The locking mechanism includes a locking member 31 rotatably or slidably provided on one of the two members of the lower push rod 21 and the bottom bracket assembly 1, and a locking groove 21a provided on the other of the two members of the lower push rod 21 and the bottom bracket assembly 1 to be engaged with the locking member 31, the locking member 31 having a locking portion 31 a. When the lock mechanism is in the locked state, the lock portion 31a is engaged with the lock groove 21a, and when the lock mechanism is in the unlocked state, the engagement between the lock portion 31a and the lock groove 21a is released, and the lock member 31 is completely disengaged from the lock groove 21 a.

The locking member 31 further has an unlocking portion 31b, the unlocking portion 31b is capable of engaging with the upper push rod 22, when the stroller is in the unfolded state, the engagement between the unlocking portion 31b and the upper push rod 22 is disengaged, when the upper push rod 22 slides downward relative to the lower push rod 21 until the upper push rod 22 engages with the unlocking portion 31b and the upper push rod 22 continues to slide downward, the engagement between the locking portion 31a and the locking groove 21a can be disengaged by the engagement between the unlocking portion 31b and the upper push rod 22, and the locking member 31 can be driven to rotate or slide relative to the lower push rod 21 or the bottom bracket assembly 1.

In this embodiment, the locking member 31 is rotatably disposed on the bottom bracket assembly 1, and the locking groove 21a is disposed on the pipe wall of the lower push rod 21. Since the upper push rod 22 is located in the lumen of the lower push rod 21, when the locking mechanism is in the locked state, i.e., the locking portion 31a is engaged with the locking groove 21a, the unlocking portion 31b is located in the lumen of the lower push rod 21. When the upper push rod 22 slides downwards to rotate or slide the locking member 31 relative to the lower push rod 21 or the bottom bracket assembly 1 through the engagement of the unlocking portion 31b and the upper push rod 22, and the engagement between the locking portion 31a and the locking groove 21a is released, the unlocking portion 31b engages with the locking groove 21a, at this time, the locking member 31 is not completely disengaged from the locking groove 21a, and the locking mechanism is not completely unlocked.

The lower push rod 21 is provided with a limiting part 21b, and when the upper push rod 22 slides downwards to abut against the limiting part 21 b. The upper push rod 22 cannot slide downwards relative to the lower push rod 21, and at this time, the upper push rod 22 and the lower push rod 21 form a whole, when the upper push rod 22 is pushed downwards, the push rod assembly 2 can be driven to slide downwards integrally, so that through the engagement between the unlocking part 31b and the locking groove 21a, the locking part 31 can be driven to rotate or slide continuously relative to the lower push rod 21 or the bottom bracket assembly 1, so that the engagement between the unlocking part 31b and the locking groove 21a is also released, at this time, the locking part 31 is completely disengaged from the locking groove 21a, and the locking mechanism is in a completely unlocked state.

In this embodiment, the lower portion of the push-up rod 22 is provided with a first inclined surface 22a, and the unlocking portion 31b is a second inclined surface provided on the locking member 31 to match the first inclined surface 22 a. When the stroller is in the unfolded state, the first inclined surface 22a is away from the second inclined surface, and when the upper push rod 22 slides relative to the lower push rod 21 until the first inclined surface 22a abuts against the second inclined surface, the locking member 31 can be driven to rotate or slide relative to the second inclined surface, so that the locking portion 31a is disengaged from the locking groove 21 a.

The locking mechanism further comprises a resilient member 32 for urging the locking member 31 to return from the unlocked to the locked condition. In this embodiment, the elastic member 32 is a torsion spring, and two ends of the torsion spring are respectively disposed on the locking member 31 and the bottom bracket assembly 1.

Two specific configurations of the bottom bracket assembly 1 are given below.

Example 1

As shown in fig. 1 to 16, the bottom bracket assembly 1 includes a front bracket 101, a rear bracket 102, a slider 103, a front basket lever 104 and a rear basket lever 105. The front bracket 101 is used for mounting the front wheel assembly 4, the rear bracket 102 is used for mounting the rear wheel assembly 5, the front bracket 101 and the rear bracket 102 are respectively and rotatably connected with the sliding piece 103, and in the embodiment, the rotating shaft of the front bracket 101 and the sliding piece 103 is coaxial with the rotating shaft of the rear bracket 102 and the sliding piece 103. The slider 103 is provided on the lower push rod 21 so as to be slidable in the longitudinal extension direction of the lower push rod 21. The front of the front basket lever 104 is rotatably connected to the lower portion of the front bracket 101, the rear of the rear basket lever 105 is rotatably connected to the lower portion of the rear bracket 102, two of the three components of the rear of the front basket lever 104, the front of the rear basket lever 105 and the lower portion of the lower push rod 21 are rotatably connected, and the third component is rotatably connected to any one of the two components or the three components are rotatably connected with the same shaft, in this embodiment, the three components of the rear of the front basket lever 104, the front of the rear basket lever 105 and the lower portion of the lower push rod 21 are rotatably connected with the same shaft.

The bottom bracket assembly 1 further comprises a seat assembly for seating and standing a child, the seat assembly comprising a seat lever 106 and a link 107, a rear portion of the seat lever 106 is rotatably connected to the lower push lever 21, one end portion of the link 107 is rotatably connected to the seat lever 106, and the other end portion of the link 107 is rotatably connected to the front basket lever 104.

Thus, a crank-slider mechanism is formed among the front bracket 101, the slider 103, the down-push rod 21 and the front basket lever 104, a crank-slider mechanism is formed among the rear bracket 102, the slider 103, the down-push rod 21 and the rear basket lever 105, and a four-link mechanism is formed among the seat lever 106, the down-push rod 21, the front basket lever 104 and the link lever 107.

In the present embodiment, a lock member 31 is rotatably provided on the slider 103, which is used to lock the relative position between the slider 103 and the push-down lever 21. When the relative position between the sliding member 103 and the lower push rod 21 is fixed, the relative position between the lower push rod 21 and the bottom bracket assembly 1 is fixed, and the position of the whole bottom bracket assembly 1 is also fixed, i.e. the bottom bracket assembly 1 can be locked in the unfolded state by the locking mechanism.

When the stroller is in the unfolded state, the relative position between the upper push rod 22 and the lower push rod 21 is locked, the locking mechanism is in the locked state, the upper push rod 22 protrudes mostly outside the tube cavity of the lower push rod 21, the front basket rod 104 and the rear basket rod 105 both extend in the front-rear direction and both extend approximately in the same linear direction, and the first inclined surface 22a of the upper push rod 22 is away from the unlocking portion 31b, i.e., the second inclined surface, as shown in fig. 1, 5 and 6.

When the stroller needs to be folded, after the locking between the upper push rod 22 and the lower push rod 21 is unlocked, the upper push rod 22 slides downwards relative to the lower push rod 21, and the upper push rod 22 gradually retracts into the tube cavity of the lower push rod 21 until the first inclined surface 22a of the upper push rod 22 abuts against the unlocking part 31b, i.e. the second inclined surface, of the locking member 31, as shown in fig. 7 and 8; at this time, as the upper push rod 22 continues to slide downward relative to the lower push rod 21, the locking member 31 is driven to rotate relative to the slider 103 until the locking member 31 rotates until the locking portion 31a thereof is disengaged from the locking groove 21a, and at this time, the unlocking portion 31b, i.e., the second inclined surface, of the locking member 31 enters the locking groove 21a, as shown in fig. 9 and 10; the upper push rod 22 continues to slide downwards relative to the lower push rod 21 until the lower part of the upper push rod 22 abuts against the limiting part 21b on the lower push rod 21, and the upper push rod 22 cannot continue to slide downwards relative to the lower push rod 21, as shown in fig. 11 and 12; when the upper push rod 22 is pushed downwards, the whole formed by the upper push rod 22 and the lower push rod 21 slides downwards relative to the sliding part 103, and the locking part 31 continues to rotate relative to the sliding part 103 through the matching of the second inclined surface and the locking groove 21a until the unlocking part 31b, namely the second inclined surface, is disengaged from the locking groove 21a, as shown in fig. 13 and 14, at this time, the locking part 31 is completely disengaged from the locking groove 21a, the locking mechanism is in a completely unlocked state, and the stroller frame can be folded.

When the stroller frame is folded, the whole formed by the upper push rod 22 and the lower push rod 21 slides downwards relative to the sliding part 103, the front bracket 101 is pulled by the front basket rod 104 to rotate backwards to be close to the lower push rod 21, the rear bracket 102 is pulled by the rear basket rod 105 to rotate forwards to be close to the lower push rod 21 until the rod pieces forming the stroller frame are close to each other, and finally the stroller frame is folded as shown in fig. 15 and 16.

The sliding member 13 in this embodiment is a sliding sleeve, which is sleeved outside the lower push rod 21, the bottom bracket assembly 1 further includes a roller 108 rotatably disposed in the tube cavity of the sliding sleeve, and the lower push rod 21 is in rolling contact with the roller 108, so that when the stroller frame is folded and the lower push rod 21 slides relative to the sliding member 103, the abrasion of the lower push rod 21 can be reduced.

When the stroller is unfolded from the folded state, the upper push rod 22 is required to slide upwards relative to the lower push rod 21, and after the upper push rod 22 slides to the proper position relative to the lower push rod 21, the position between the upper push rod 22 and the lower push rod 21 can be locked relatively, and at this time, when the upper push rod 22 slides upwards, the lower push rod 21 can be driven to slide upwards relative to the sliding part 103, so that the front support 101 rotates forwards and is far away from the lower push rod 21, the rear support 102 rotates backwards and is far away from the lower push rod 21, until the locking mechanism is in the locked state again, and the entire stroller frame is in the unfolded state.

Example 2

As shown in fig. 17 to 22, the bottom bracket assembly 1 includes a front bracket 111, a rear bracket 112, and a vertical rod 113. The front bracket 111 is used for mounting the front wheel assembly 4, and the rear bracket 112 is used for mounting the rear wheel assembly 5. The lower push rod 21 is slidably provided on the front bracket 111 in a length extending direction of the front bracket 111, and an upper portion of the rear bracket 112 is rotatably coupled to a lower portion of the lower push rod 21. One end of the vertical rod 113 is rotatably connected to an upper portion of the front bracket 111, and the other end of the vertical rod 113 is rotatably connected to the rear bracket 112.

The bottom bracket assembly 1 further comprises a seat assembly for a child to sit on, the seat assembly comprising a seat plate 114, a front stay 115 and a rear stay 116 for supporting the seat plate 114. The front support rod 115 is fixedly arranged on the front bracket 111, the rear support rod 116 is rotatably connected with the rear bracket 112, and the seat plate 114 is rotatably connected with the front support rod 115 and the rear support rod 116 respectively.

Thus, a slider-crank mechanism is formed among the front bracket 11, the lower push rod 21, the rear bracket 112, and the vertical rod 113.

In the present embodiment, a lock member 31 is rotatably provided on the front bracket 111, and is used to lock the relative position between the front bracket 111 and the push down lever 21. When the relative position between the front bracket 111 and the lower push rod 21 is fixed, the relative position between the lower push rod 21 and the bottom bracket assembly 1 is fixed, and the position of the whole bottom bracket assembly 1 is also fixed, i.e. the bottom bracket assembly 1 can be locked in the unfolded state by the locking mechanism.

The bottom bracket component 1 further comprises a string bag support rod 117, a fixed seat 113a is fixedly arranged on the vertical rod 113, one end of the string bag support rod 117 is rotatably connected with the rear support rod 116, and the string bag support rod 117 is placed on the fixed seat 113 a. In this embodiment, one end of the string bag supporting rod 117, the lower portion of the rear supporting rod 116 and the rear supporter 112 are rotatably connected in the same axis.

When the child stroller is in the unfolded state, the relative position between the upper push rod 22 and the lower push rod 21 is locked, the locking mechanism is in the locked state, most of the upper push rod 22 extends out of the tube cavity of the lower push rod 21, the rear support rod 116 is in a U-shaped structure with a downward opening, the string bag support rod 117 is in a U-shaped structure with a forward opening, and the first inclined surface 22a of the upper push rod 22 is far away from the unlocking part 31b, namely the second inclined surface, as shown in fig. 17, 18 and 19.

When the stroller needs to be folded, the locking mechanism is unlocked first, and the unlocking process of the locking mechanism is the same as that of embodiment 1, and is not described in detail herein.

When the locking mechanism unlocks the frame of the rear stroller to be folded, the whole formed by the upper push rod 22 and the lower push rod 21 slides downwards relative to the front bracket 111 to be close to the front bracket 111, the upright 113 pulls the rear bracket 112 to rotate backwards to be close to the lower push rod 21, the folding process is as shown in fig. 20 and 21 until all the rod pieces forming the frame of the stroller are close to each other, and finally the folding process is as shown in fig. 22.

When the stroller is unfolded from the folded state, the upper push rod 22 is required to slide upwards relative to the lower push rod 21, and after the upper push rod 22 slides to the proper position relative to the lower push rod 21, the position between the upper push rod 22 and the lower push rod 21 can be locked relatively, at this time, when the upper push rod 22 slides upwards, the lower push rod 21 can be driven to slide upwards relative to the front bracket 111 and be away from the front bracket 111, the rear bracket 102 is rotated forwards through the upright rod 113 and is away from the lower push rod 21 until the locking mechanism is locked again, and the entire stroller frame is unfolded.

Of course, the bottom bracket assembly 1 of the present application is not limited to the above two embodiments, and other configurations may be adopted.

When the child stroller is folded, the locking mechanism does not need to be operated independently, after the locking between the upper push rod and the lower push rod is unlocked, the upper push rod slides relative to the lower push rod to a certain degree to unlock part of the locking mechanism, and at the moment, the lower push rod can also slide downwards when the upper push rod continues to slide downwards, so that the locking mechanism is completely unlocked, and the stroller frame can be folded. The unlocking operation of the locking mechanism is convenient, and the folding operation of the baby stroller is facilitated.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. The utility model provides a children's shallow, has expansion and fold condition, children's shallow includes the push down rod, can follow the length extending direction of push down rod sets up with sliding the last push up rod on the push down rod, with the push down rod rotates and sliding connection's underframe subassembly and is used for with the underframe subassembly with the locking mechanical system of push down rod's relative position locking, its characterized in that: the locking mechanism comprises a locking piece which can be arranged on one of the lower push rod and the two components of the bottom bracket component in a rotating or sliding manner and a locking groove which is arranged on the other one of the lower push rod and the two components of the bottom bracket component and is matched with the locking piece, the locking piece is provided with a locking part, when the locking mechanism is in a locking state, the locking part is matched with the locking groove, when the locking mechanism is in an unlocking state, the locking part is disengaged from the locking groove, the locking piece is also provided with an unlocking part which can be matched with the upper push rod, when the child stroller is in an unfolding state, the unlocking part is disengaged from the upper push rod, when the upper push rod slides to the upper push rod relative to the lower push rod and is matched with the unlocking part, the locking piece can be driven to rotate or slide so as to disengage the locking part from the locking groove.

2. The stroller of claim 1, wherein: the unlocking part can be matched with the lock groove, when the locking mechanism is in a locking state, the unlocking part is disengaged from the lock groove, when the locking part rotates or slides relatively to enable the locking part to be disengaged from the lock groove, the unlocking part is matched with the lock groove, and the lower push rod slides relatively to the bottom bracket to drive the unlocking part to be disengaged from the lock groove.

3. Child stroller according to claim 1 or 2, characterized in that: the lower part of the upper push rod is provided with a first inclined plane, the unlocking part is a second inclined plane which is arranged on the locking part and matched with the first inclined plane, when the stroller is in an unfolded state, the first inclined plane is far away from the second inclined plane, and when the upper push rod is opposite to the lower push rod, the lower push rod slides to the first inclined plane and the second inclined plane are abutted, the locking part can be driven to rotate relatively or slide to enable the locking part to be disengaged from the locking groove in a matching manner.

4. The stroller of claim 1, wherein: the locking mechanism further comprises an elastic piece for driving the locking piece to reset from the unlocking state to the locking state, and the elastic piece is arranged between the locking piece and one of the two components of the lower push rod and the bottom bracket component.

5. The stroller of claim 1, wherein: the bottom bracket component comprises a front bracket for mounting a front wheel component, a rear bracket for mounting a rear wheel component, a sliding part, a front basket rod and a rear basket rod, wherein the sliding part is arranged on the lower push rod in a sliding manner along the length extension direction of the lower push rod, the upper part of the front bracket and the upper part of the rear bracket are respectively and rotatably connected with the sliding part, the front part of the front basket rod is rotatably connected with the lower part of the front bracket, the rear part of the rear basket rod is rotatably connected with the lower part of the rear bracket, two of the three parts of the rear part of the front basket rod, the front part of the rear basket rod and the lower part of the lower push rod are rotatably connected, and the third part is rotatably connected with any one of the two parts or the three parts are rotatably connected in the same shaft.

6. The stroller of claim 5, wherein: the bottom bracket component also comprises a seat rod and a connecting rod, the rear part of the seat rod is rotationally connected with the lower push rod, one end part of the connecting rod is rotationally connected with the seat rod, and the other end part of the connecting rod is rotationally connected with the front basket rod.

7. The stroller of claim 5, wherein: the bottom bracket component also comprises a roller which can be rotatably arranged on the sliding component, and the lower push rod is in rolling contact with the roller.

8. The stroller of claim 1, wherein: the bottom bracket component comprises a front bracket used for mounting a front wheel component, a rear bracket used for mounting a rear wheel component and a vertical rod, the lower push rod can be arranged on the front bracket in a sliding manner along the length extending direction of the front bracket, the upper part of the rear bracket is rotationally connected with the lower part of the lower push rod, one end part of the vertical rod is rotationally connected with the upper part of the front bracket, and the other end part of the vertical rod is rotationally connected with the rear bracket.

9. The stroller of claim 8, wherein: the bottom bracket component further comprises a seat plate, a front support rod and a rear support rod, the front support rod and the rear support rod are used for supporting the seat plate, the front support rod is fixedly arranged on the front support, the rear support rod is rotatably connected with the rear support, and the seat plate is respectively rotatably connected with the front support rod and the rear support rod.

10. The stroller of claim 1, wherein: the locking mechanism is capable of locking the chassis assembly in a deployed state.

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