CN113147876B

CN113147876B - Children's barrow

Info

Publication number: CN113147876B
Application number: CN202110259105.9A
Authority: CN
Inventors: 李照国; 周志华
Original assignee: Goodbaby Child Products Co Ltd
Current assignee: Goodbaby Child Products Co Ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2022-08-02
Anticipated expiration: 2041-03-10
Also published as: CN113147876A

Abstract

The invention discloses a children's barrow, which comprises an armrest device arranged on a frame, wherein the armrest device comprises an armrest rod and an armrest mounting seat, the armrest rod is rotationally connected to the armrest mounting seat, the armrest device also comprises an armrest locking mechanism and an unlocking piece, the unlocking piece is provided with a first position and a second position, and when the unlocking piece is positioned at the first position, the armrest locking mechanism is in a locking state; when the unlocking piece is positioned at the second position, the handrail locking mechanism is in an unlocking state; the frame includes first cradling piece and the second cradling piece that relative rotation connects, and the handrail mount pad sets firmly on first cradling piece, is provided with the driving piece on the second cradling piece, and first cradling piece rotates the in-process that draws in with the second cradling piece relatively, and the driving piece mutually supports with the deblocking piece for the deblocking piece is by first position to the second position conversion. According to the child stroller provided by the invention, the grab rail can rotate along with the frame to be folded, and the grab rail does not need to be unlocked independently, so that the folding step of the frame is greatly simplified, and the child stroller is convenient to use.

Description

Children's barrow

Technical Field

The invention relates to the field of children products, in particular to a stroller.

Background

In the prior art, the frame of the stroller generally includes a front armrest that is held by a child and is protected, and the front armrest is rotatably or detachably connected to the front portion of the frame. When the frame needs to be folded, the front handrails of some trolleys need to be detached, and the front handrails of some trolleys are provided with independent locking and unlocking mechanisms and need to be unlocked and folded independently. In summary, the conventional front armrests cannot be interlocked with the whole frame to unlock and fold, so that the folding operation steps are increased, and the stroller is inconvenient to use.

Disclosure of Invention

The invention aims to provide a stroller with a handrail device capable of being unlocked and folded in a linkage manner when being folded along with a frame.

In order to achieve the purpose, the invention adopts the technical scheme that:

a stroller comprises a frame with an unfolded state and a folded state, and an armrest device arranged on the frame, wherein the armrest device comprises an armrest rod and an armrest mounting seat, the armrest rod is rotatably connected to the armrest mounting seat, the armrest device further comprises an armrest locking mechanism used for relatively locking the armrest rod and the armrest mounting seat, and an unlocking piece used for unlocking the armrest locking mechanism, the unlocking piece has a first position and a second position which can be switched, and when the unlocking piece is located at the first position, the armrest locking mechanism is in a locked state; when the unlocking piece is positioned at the second position, the armrest locking mechanism is in an unlocking state; the frame comprises a first support rod and a second support rod which are connected in a relatively rotating mode, the handrail mounting seat is fixedly arranged on the first support rod, a driving piece is arranged on the second support rod, and in the process that the first support rod and the second support rod rotate relatively to be folded, the driving piece is matched with the unlocking piece, so that the unlocking piece is switched from the first position to the second position.

Preferably, the armrest rod is rotatably connected to the armrest mounting base about a first rotation center line, the first support rod is rotatably connected to the second support rod about a second rotation center line, and the first rotation center line and the second rotation center line are parallel to each other.

Preferably, the driving member is fixedly disposed on the second rack bar, and the driving member is disposed at a distance from the second rotation center line.

Preferably, the unlocking member is slidably provided on the handle bar or the handle mount, and the unlocking member is switched between the first position and the second position when sliding in a linear direction.

Further preferably, the driving member is a protrusion fixedly disposed on the second support rod, the unlocking member has a pushing inclined plane cooperating with the protrusion, and the protrusion drives the unlocking member to switch from the first position to the second position when sliding along the pushing inclined plane.

Preferably, the grab rail with the handrail mount pad is connected around first rotation axis rotatoryly, the unblocking piece around third rotation axis rotatoryly set up on the grab rail or the handrail mount pad, third rotation axis with first rotation axis is parallel to each other or collinear extension, realize when the unblocking piece is rotatory around third rotation axis between first position with the second position.

Further preferably, a protruding column is fixedly arranged on the unlocking piece, the length extending direction of the protruding column is parallel to the third rotation center line, the driving piece is provided with an arc-shaped protrusion, and the protruding column drives the unlocking piece to rotate from the first position to the second position when sliding along the arc-shaped protrusion.

Preferably, the armrest rod is rotatably connected to the armrest mounting seat around a first rotation center line, the armrest locking mechanism includes a first lock portion provided on the armrest rod, a second lock portion provided on the armrest mounting seat, and a locking gear slidably provided between the first lock portion and the second lock portion, a plurality of locking teeth are provided at intervals on a peripheral portion of the locking gear, the first lock portion has a plurality of first lock grooves distributed at intervals in a circumferential direction, the second lock portion has a plurality of second lock grooves distributed at intervals in the circumferential direction, and when the armrest locking mechanism is in a locked state, the locking teeth are inserted into the first lock grooves and the second lock grooves; when the armrest locking mechanism is in an unlocking state, the locking teeth are only inserted into the first locking grooves, the unlocking piece is movably arranged on the armrest mounting seat, and the armrest locking mechanism further comprises elastic pieces used for driving the locking gears to move towards the second locking grooves.

Preferably, when the frame is in a folded state, the grab bar is stowed between the first and second support bars.

Preferably, the handrail mount is detachably mounted on the first support bar.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the child stroller provided by the invention, the driving piece and the unlocking piece are arranged, so that when the first support rod and the second support rod rotate relatively to be folded, the handrail locking mechanism is unlocked in a linkage manner, the handrail rods can be folded along with the rotation of the stroller frame, the handrail rods do not need to be unlocked independently, the folding step of the stroller frame is greatly simplified, and the stroller is convenient to use.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a stroller in an expanded state according to an embodiment of the present invention;

FIG. 2 is a partially exploded view of the stroller in accordance with the first embodiment;

FIG. 3 is a schematic perspective view of a push rod joint and a handrail mount in accordance with an embodiment I;

FIG. 4 is a schematic cross-sectional view of the armrest mount and push rod interface in accordance with the first embodiment, wherein the release button is locked;

FIG. 5 is a schematic cross-sectional view of the armrest mount and push rod interface in accordance with the first embodiment, wherein the release button is unlocked;

FIG. 6 is an exploded perspective view of the armrest locking mechanism, the front strut joint, and the push rod joint in the first embodiment;

FIG. 7 is an exploded perspective view of an armrest locking mechanism according to a first embodiment;

FIG. 8 is a perspective view of the stroller in the first embodiment during folding;

FIG. 9 is a partial perspective view of the front support bar and armrest apparatus according to the first embodiment, wherein the armrest locking mechanism is in a locked position;

FIG. 10 is a schematic partial side view of the armrest apparatus in a first embodiment in combination with a front leg joint and a push rod joint, wherein the armrest locking mechanism is in a locked position;

FIG. 11 is a cross-sectional view taken along line M-M of FIG. 10;

FIG. 12 is a perspective view of the stroller in the first embodiment during further folding;

FIG. 13 is a partial perspective view of the front support bar and armrest apparatus according to the first embodiment, wherein the armrest locking mechanism is in an unlocked position;

FIG. 14 is a schematic partial side view of the armrest apparatus and the front and push rod interfaces of the first embodiment, wherein the armrest locking mechanism is in an unlocked position;

FIG. 15 is a cross-sectional view taken along line N-N of FIG. 14;

FIG. 16 is a perspective view of the stroller in the first embodiment in a folded state;

fig. 17 is a perspective view of the stroller in the second embodiment in the unfolded state;

FIG. 18 is a perspective view of a front strut joint in a second embodiment;

FIG. 19 is a perspective view of the unlocking member in the second embodiment;

FIG. 20 is an exploded perspective view of the second embodiment of the armrest locking mechanism and the push rod interface;

FIG. 21 is a perspective view of a lock gear according to a second embodiment;

FIG. 22 is a perspective view of the stroller of the second embodiment during folding;

FIG. 23 is a partial perspective view of the armrest apparatus, front strut joint, and push rod joint in accordance with the second embodiment, wherein the armrest locking mechanism is in a locked position;

FIG. 24 is a schematic partial side view of the armrest apparatus in accordance with the second embodiment shown in conjunction with the front and push rod interfaces, wherein the armrest locking mechanism is in a locked position;

FIG. 25 is a cross-sectional view taken at P-P of FIG. 24;

fig. 26 is a perspective view of the stroller of the second embodiment during further folding;

FIG. 27 is a partial perspective view of the armrest apparatus, front strut joint, and push rod joint in accordance with the second embodiment, wherein the armrest locking mechanism is in an unlocked state;

FIG. 28 is a schematic partial side view of the armrest apparatus and the front and push rod interfaces of the second embodiment, wherein the armrest locking mechanism is in an unlocked position;

FIG. 29 is a cross-sectional view taken along line Q-Q of FIG. 28;

FIG. 30 is a perspective view of the stroller of the second embodiment in a folded state;

wherein: 100. a handrail device; 200. a push rod; 201. a rod is arranged; 202. a lower rod; 300. a front support rod; 400. a rear support rod; 500. a front wheel assembly; 600. a rear wheel assembly; 700. a seat; 800. a seat post;

x, a first rotation center line; y, a second rotation center line; z, a third rotation center line;

1. a grab rail; 11. a first lock portion; 111. a first locking groove; 2. a handrail mounting seat; 21. a second lock portion; 211. a second locking groove; 22. an armrest interface; 22a and a limiting groove; 23. disassembling the button; 231. a pressing part; 232. a clamping part; 24. a sleeve; 3. unlocking the lock; 31. a pushing part; 32. a convex column; 33. pushing the inclined plane; 4. a drive member; 41. an arc-shaped bulge; 5. a locking gear; 51. a locking tooth; 52. unlocking the chute; 6. an elastic member; 7. a push rod joint; 71. a push rod connector; 71a, a limiting bulge; 711. a connector slot; 8. a front strut joint; 9. a rear strut joint.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention may be more readily understood by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "left-right", "height", "front-back" and the like indicate the orientation or positional relationship shown when an adult of a stroller holds a handlebar based on fig. 1, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, only a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.

Example one

Referring to fig. 1 and 2, a stroller comprises a frame having an unfolded state and a folded state, wherein the frame comprises two groups of side brackets respectively arranged at the left side and the right side, and each group of side brackets comprises: the bottom of the front support rod 300 is provided with a front wheel assembly 500, and the upper end part of the front support rod 300 is fixedly provided with a front support rod joint 8; the bottom of the rear support rod 400 is provided with a rear wheel assembly 600, and the upper end part of the rear support rod 400 is fixedly provided with a rear support rod joint 9; the push rod 200 comprises an upper rod 201 and a lower rod 202 which are connected in a rotating mode, the lower end portion of the lower rod 202 is fixedly provided with a push rod joint 7, the front rod joint 8 and the rear rod joint 9 are connected in a rotating mode around a second rotating center line Y, and in the left-right direction of the vehicle frame, the rear rod joint 9, the front rod joint 8 and the push rod joint 7 are sequentially arranged from inside to outside. The stroller further comprises a frame locking mechanism for locking the frame, and the frame locking mechanism can adopt a structure in the prior art, but the invention is not limited.

In this embodiment, the push rod 200 is used as a first support rod, and the front support rod 300 is used as a second support rod.

In this embodiment, the frame further includes a seat 700 and an armrest apparatus 100 disposed between the left and right sets of side frames. Specifically, the armrest apparatus 100 includes a armrest rod 1 and an armrest mounting seat 2, the armrest rod 1 is U-shaped, the armrest mounting seat 2 has two sets of armrest rods 1 disposed on the left and right sides, the two sets of armrest mounting seats 2 have similar structures, each set of armrest mounting seat 2 is fixedly disposed on the push rod joint 7 on the same side, two ends of the armrest rod 1 are respectively rotatably connected to the set of armrest mounting seats 2 around a first rotation center line X, and the first rotation center line X and a second rotation center line Y are parallel to each other and extend along the left and right directions of the vehicle frame.

Further, the armrest apparatus 100 further comprises an armrest locking mechanism for locking the armrest rod 1 and the armrest mounting seat 2 relative to each other, and an unlocking piece 3 for unlocking the armrest locking mechanism, wherein the unlocking piece 3 has a first position and a second position which can be switched, and when the unlocking piece 3 is in the first position, the armrest locking mechanism is in a locked state; when the unlocking member 3 is in the second position, the armrest locking mechanism is in the unlocked state. Correspondingly, the driving member 4 is disposed on the front support rod 300, and in the process that the push rod 200 and the front support rod 300 are relatively rotated and folded, the driving member 4 can be matched with the unlocking member 3, so that the unlocking member 3 is switched from the first position to the second position.

Referring to fig. 3 to 5, in the present embodiment, the armrest mount 2 is detachably attached to the push rod connector 7. A push rod connector 71 is fixedly arranged at one side part of the push rod connector 7, a limiting bulge 71a is arranged at two sides of the push rod connector 71, and a connector clamping groove 711 is arranged at the bottom of the push rod connector 71. Correspondingly, the handrail mounting seat 2 is provided with a semi-open sleeve 24, the sleeve 24 can be sleeved on the push rod connector 7, one side part of the sleeve 24 is provided with a handrail interface 22 matched with the push rod connector 71, and the handrail interface 22 is provided with a limiting groove 22a matched with the limiting protrusion 71 a. In addition, the bottom of handrail interface 22 is equipped with and is used for carrying out the dismantlement button 23 of dismantling the connection, dismantle button 23 and connect on handrail mount pad 2 through pivot A rotation ground, dismantle button 23 has and locates the splenium 231 and the joint portion 232 of pressing of pivot A difference both sides, wherein, it is located the handrail mount pad 2 outside to press the splenium 231 at least partially, can supply the user to operate, joint portion 232 cooperatees with connecting piece draw-in groove 711, dismantle button 23 still including being used for providing joint portion 232 towards the required effort of connecting piece draw-in groove 711 motion elastic component (not shown in the figure). When the handrail installation seat 2 is fixedly connected with the push rod connector 7, the clamping part 232 is inserted into the connecting piece clamping groove 711; when it is necessary to detach the armrest mount 2, the pressing portion 231 is pressed down so that the detachment button 23 rotates about the rotation axis a, and the armrest mount 2 can be detached from the push rod joint 7.

Referring to fig. 6 to 7, the armrest locking mechanism specifically includes a first lock portion 11 disposed on the armrest rod 1, a second lock portion 21 disposed on the armrest mounting seat 2, and a locking gear 5 slidably disposed between the first lock portion 11 and the second lock portion 21, wherein a plurality of locking teeth 51 are disposed at intervals on a peripheral portion of the locking gear 5, the first lock portion 11 has a plurality of first lock grooves 111 circumferentially spaced apart from each other, and the second lock portion 21 has a plurality of second lock grooves 211 circumferentially spaced apart from each other. The armrest locking mechanism further includes an elastic member 6 for urging the locking gear 5 toward the second locking groove 211.

Referring to fig. 11, when the armrest locking mechanism is in the locked state, the locking teeth 51 are simultaneously inserted into the first locking groove 111 and the second locking groove 211; referring to fig. 15, when the armrest locking mechanism is in the unlocked state, the locking teeth 51 are disengaged from the second locking grooves 211 and are merely inserted into the first locking grooves 111.

Referring to fig. 6 to 7, the unlocking member 3 is movably disposed on the grab bar 1 or the grab bar mounting seat 2, in the embodiment, the unlocking member 3 is slidably disposed on the grab bar mounting seat 2 along the extending direction of the first rotation center line X, the first position of the unlocking member 3 is located on the side far from the grab bar 1, and the second position is located on the side close to the grab bar 1. Specifically, the unlocking piece 3 is an arc-shaped cover protruding outwards, the periphery of the arc-shaped cover is provided with a pushing inclined plane 33, when the handrail locking mechanism is in a locked state, at least part of the unlocking piece 3 is exposed out of the handrail mounting seat 2, one side of the unlocking piece 3 facing the locking gear 5 is provided with a plurality of pushing parts 31, the pushing parts 31 are matched with the locking gear 5, and therefore when the unlocking piece 3 moves from a first position to a second position, the pushing parts 31 abut against the locking gear 5 and drive the locking gear 5 to move towards the first locking part 11, and unlocking is achieved.

In this embodiment, the driving element 4 is a protrusion fixed on the front rod joint 8, the protrusion is disposed on a side portion of the front rod joint 8 facing the armrest mounting seat 2, and the driving element 4 is disposed at a distance from the second rotation center line Y.

The following details describe the working process of the stroller in this embodiment:

referring to fig. 1, when the frame is in the unfolded state, the frame locking mechanism and the handrail locking mechanism are both in the locked state, and the handrail rod 1 gradually extends obliquely upward from the back to the front.

Referring to fig. 8 to 11, when the frame needs to be folded, the frame locking mechanism is first unlocked, the upper rod 201 of the push rod 200 is folded back and folded with the lower rod 202, and then the push rod 200 is driven to rotate forward around the second rotation center line Y, so as to drive the armrest apparatus 100 to rotate forward synchronously and gradually close with the front rod 300.

Referring to fig. 12 to 15, the frame is folded continuously, the push rod 200 is rotated toward the front support rod 300 to move closer until the unlocking piece 3 of the armrest mounting seat 2 contacts the driving piece 4 on the front support rod 300, the driving piece 4 slides against the pushing inclined plane 33 of the unlocking piece 3, and the unlocking piece 3 is driven to switch from the first position to the second position, so that the armrest locking mechanism is unlocked in a linkage manner, and the armrest rod 1 can rotate around the first rotation center line X and is folded together with other rod pieces of the frame.

Referring to fig. 16, when the frame is in the folded state, the grab bar 1 is folded between the push rod 200 and the front rod 300, and the frame rods are compactly folded together, so that the folded volume is greatly reduced, and the storage are convenient.

The stroller of the embodiment can realize linkage unlocking of the armrest locking mechanism only by unlocking the frame locking mechanism and in the process of rotating and folding the push rod 200 and the front support rod 300, so that the folding step is greatly simplified, and the stroller is convenient to use.

Example two

Referring to fig. 17 to 21, the arrangement and connection of the main rods of the stroller in this embodiment are substantially the same as those in the first embodiment, and the push rod 200 is used as the first support rod, and the front support rod 300 is used as the second support rod, which mainly differs from the specific arrangement of the armrest locking mechanism, the unlocking member 3 and the driving member 4. In addition, in this embodiment, a seat bar 800 is further provided between the two sets of rear strut connectors 9.

In this embodiment, the unlocking member 3 is rotatably provided on the armrest mounting base 2 about a third rotation center line Z extending in the same line as the first rotation center line X.

In some embodiments, the unlocking member 3 may be provided on the grab bar 1, and the third rotation center line Z and the first rotation center line X may be provided in parallel with each other.

In this embodiment, the unlocking member 3 is eccentrically and fixedly provided with a protruding pillar 32, the length extending direction of the protruding pillar 32 is parallel to the third rotation center line Z, and the protruding pillar 32 is disposed on one side of the unlocking member 3 close to the front support rod 300. In cooperation with the driving member 4, the driving member 4 is fixedly disposed on the front strut connector 8 and spaced from the second rotation center line Y, the driving member 4 has an arc-shaped protrusion 41, and the protruding column 32 can slide along the arc-shaped protrusion 41 in a matching manner, so as to unlock the armrest locking mechanism.

In addition, in the present embodiment, one side of the unlocking member 3 close to the locking gear 5 has two convex pushing portions 31, each pushing portion 31 has an arc-shaped inclined surface extending obliquely toward the locking gear 5, and one side of the locking gear 5 toward the unlocking member 3 has two unlocking inclined grooves 52 matched with the arc-shaped inclined surfaces.

So, when protruding post 32 slided along arc arch 41, it is rotatory around third rotation center line Z to order about 3 switching of unlocking piece between primary importance and second place: when the unlocking piece 3 is at the first position, the pushing part 31 is correspondingly inserted in the unlocking chute 52; when the unlocking member 3 is in the second position, the pushing portion 31 is disengaged from the unlocking slant groove 52 and abuts on the side surface of the locking gear 5.

referring to fig. 17, 22 to 25, in the present embodiment, the frame is in the unfolded state substantially the same as the first embodiment, the unlocking member 3 is in the first position, and the locking teeth 51 are simultaneously inserted into the first locking groove 111 and the second locking groove 211. When the frame needs to be folded, the frame locking mechanism is unlocked, the push rod 200 rotates forward around the second rotation center line Y, the armrest apparatus 100 is driven to rotate forward and gradually approach the front support rod 300, and the convex column 32 starts to contact with the arc-shaped protrusion 41 and slides along the arc-shaped protrusion 41.

Referring to fig. 26 to 29, the push rod 200 is continuously driven to rotate and draw close to the front rod 300, the protruding column 32 slides along the arc-shaped protrusion 41, the unlocking piece 3 is driven to rotate around the third rotation center line Z and moves from the first position to the second position, the pushing portion 31 pushes the locking gear 5 to move towards the first locking portion 11 and disengage from the second locking portion 21, so that the armrest locking mechanism is unlocked, and the armrest rod 1 can rotate around the first rotation center line X and draw close together with other rods of the frame.

Referring to fig. 30, when the frame is in the folded state, the grab bar 1 is folded between the push rod 200 and the front rod 300, and the frame rods are compactly folded together, so that the folded volume is greatly reduced, and the storage are convenient.

The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.

Claims

1. The utility model provides a children's shallow, is in including frame, the setting that has expansion state and fold condition handrail device on the frame which characterized in that: the armrest device comprises an armrest rod and an armrest mounting seat, the armrest rod is rotatably connected to the armrest mounting seat, the armrest device further comprises an armrest locking mechanism used for locking the armrest rod and the armrest mounting seat relatively, and an unlocking piece used for unlocking the armrest locking mechanism, the unlocking piece is provided with a first position and a second position which can be switched, and when the unlocking piece is located at the first position, the armrest locking mechanism is in a locking state; when the unlocking piece is in the second position, the armrest locking mechanism is in an unlocking state;

the frame comprises a first support rod and a second support rod which are connected in a relative rotating mode, the handrail mounting seat is fixedly arranged on the first support rod, a driving piece is arranged on the second support rod, and the driving piece is matched with the unlocking piece in a mutual matching mode in the relative rotating and folding process of the first support rod and the second support rod, so that the unlocking piece is switched from the first position to the second position;

the armrest rod is rotatably connected with the armrest mounting seat around a first rotation center line, the first support rod is rotatably connected with the second support rod around a second rotation center line, the first rotation center line and the second rotation center line are parallel to each other and are not collinear, the unlocking piece is rotatably arranged on the armrest rod or the armrest mounting seat around a third rotation center line, the third rotation center line and the first rotation center line are parallel to each other or extend in a collinear manner, and switching between the first position and the second position is realized when the unlocking piece rotates around the third rotation center line.

2. The stroller of claim 1, wherein: the driving piece is fixedly arranged on the second support rod, and the driving piece and the second rotation center line are arranged at intervals.

3. The stroller of claim 1, wherein: the unlocking piece is fixedly provided with a convex column, the length extending direction of the convex column is parallel to the third rotation center line, the driving piece is provided with an arc-shaped protrusion, and the convex column is driven to rotate automatically when sliding along the arc-shaped protrusion from the first position to the second position.

4. The stroller of claim 1, wherein: the armrest locking mechanism comprises a first locking part arranged on the armrest rod, a second locking part arranged on the armrest mounting seat and a locking gear which is arranged between the first locking part and the second locking part in a sliding mode, a plurality of locking teeth are arranged on the periphery of the locking gear at intervals, the first locking part is provided with a plurality of first locking grooves which are distributed at intervals along the circumferential direction, the second locking part is provided with a plurality of second locking grooves which are distributed at intervals along the circumferential direction, and when the armrest locking mechanism is in a locking state, the locking teeth are inserted into the first locking grooves and the second locking grooves; when the armrest locking mechanism is in an unlocked state, the locking teeth are only inserted in the first locking grooves,

the unlocking piece is movably arranged on the armrest mounting seat, and the armrest locking mechanism further comprises an elastic piece used for driving the locking gear to move towards the second locking groove.

5. The stroller of claim 1, wherein: when the frame is in a folded state, the grab rail is folded between the first support rod and the second support rod.

6. Child stroller according to any of claims 1 to 5, characterized in that: the handrail mounting seat is detachably mounted on the first support rod.