CN211844589U - Stroller frame and stroller - Google Patents

Abstract

The utility model discloses a baby carriage frame and a child stroller, wherein the baby carriage frame comprises an armrest frame, a locking mechanism, a side frame and a cross brace frame, the armrest frame comprises two rotatably connected armrest bars, the locking mechanism is arranged on the armrest frame, and the relative rotation of the two armrest bars can be limited by the locking mechanism, the side frame is arranged in two groups and can be folded, the two groups of side frames are arranged on the left and right sides of the armrest frame, one group of side frames is rotatably connected to one of the armrest bars, and the other group of side frames is rotatably connected to the other armrest bar, the cross brace frame is connected between the two groups of side frames, and the cross brace frame is arranged as a telescopic structure. Through the above structure, the side frames can be folded, and the cross brace frame can be folded in a telescopic manner, and the armrest frame can be folded in a rotating manner, so that the width of the baby carriage frame and the child stroller after folding can be reduced, which is convenient for storage and carrying.

Description

Stroller frame and stroller

technical field

The utility model relates to the field of baby products, in particular to a stroller for children.

Background technique

A stroller is a common baby appliance, which can be used by the baby to sit and lie down and be pushed by the guardian to walk, which is convenient for the baby to travel and reduces the burden of the guardian. In order to facilitate storage and carrying, some strollers are designed to be foldable. For some foldable strollers, they can only be rotated and folded forwards and backwards. More space, which will bring inconvenience to storage and carrying.

Utility model content

The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a stroller frame, which can reduce the folded width and is convenient for storage and carrying.

The utility model also provides a stroller with the above-mentioned stroller frame.

According to the first aspect of the present invention, there is provided a stroller frame, which includes an armrest frame, which includes two armrest bars that are rotatably connected; a locking mechanism is provided on the armrest frame and can limit the relative rotation of the two armrest bars; Two sets of folded side frames are respectively arranged on the left and right sides of the handrail frame, wherein one group of the side frames is rotatably connected with one of the handrail bars, and the other group of the side frames is rotatably connected with the other handrail bar; The transverse support frame is connected between the two sets of side frames, and the transverse support frame is set as a retractable structure.

The above solution has the beneficial effects: through the above structure, the side frame can be folded, the horizontal support frame can be folded by telescopic, and the armrest frame can be folded by rotating, so that the width of the folded baby carriage frame can be reduced, which is convenient for storage and carry.

According to the frame of the stroller according to the first aspect of the present invention, the locking mechanism includes a pressing block and a first elastic member, a limiting groove is provided on both the handrail bars, and the pressing block is inserted into the two handrails at the same time. In the limiting groove on the rod, the first elastic member is located between a bottom surface of the limiting groove and the pressing block.

According to the stroller frame according to the first aspect of the present invention, the locking mechanism further includes a press cover, the press cover is provided with a hook, and one of the handrails is provided with a connecting rod that communicates with the limiting groove. A limit hole, the hook passes through the limit hole and extends into the limit slot, and the pressing cover and the first elastic member are respectively arranged on two sides of the pressing block.

According to the stroller frame according to the first aspect of the present invention, the transverse support frame includes two transverse support tubes, wherein one end of the transverse support tube is provided with a mounting block, and the other transverse support tube is slidably inserted in the the mounting block; or the two transverse support tubes of the transverse support frame are sleeved with each other.

According to the stroller frame according to the first aspect of the present invention, the side frame includes a first transmission rod, a second transmission rod, a telescopic rod, a first wheel frame, a second wheel frame and a seat frame; the first transmission rod One end of the second transmission rod, one end of the second transmission rod and one end of the telescopic rod are connected by a first pivot, and the other end of the second transmission rod, the first wheel frame and the second wheel frame are connected by A second pivot connection, the other end of the telescopic rod is connected with the first wheel frame through a third pivot connection, so that the second transmission rod, the first wheel frame and the telescopic rod form A first link structure; the side frame is provided with a first locking mechanism and a second locking mechanism that can be unlocked, and the first locking mechanism can limit the relative relationship between the first transmission rod and the telescopic rod Rotation, the second locking mechanism can limit the expansion and contraction of the telescopic rod, the first locking mechanism can be unlocked when the handrail is rotated, and the second locking mechanism can be unlocked when the first transmission rod is rotated The locking mechanism is unlocked; the seat frame is connected with the first link structure through a second link structure, and the first wheel frame and the second wheel frame are connected with the second link structure through a third link structure The rod structure is connected.

According to the stroller frame according to the first aspect of the present invention, the side frame is provided with a first rod, one end of the first rod is rotatably connected to the seat frame, and the other end of the first rod is rotatably connected to the seat frame. The second pivot is rotatably connected to the first wheel frame, and the seat frame is rotatably connected to the telescopic rod, so that the telescopic rod, the seat frame, the first rod and the The first wheel carrier forms the second link structure.

According to the stroller frame according to the first aspect of the present invention, the side frame is provided with a second rod, a third rod and a fourth rod, and one end of the second rod is connected to the first rod The middle part of the second rod is rotatably connected with one end of the third rod, the middle part of the third rod is rotatably connected with the first wheel frame, and the third rod The other end of the fourth rod is rotatably connected with one end of the fourth rod, and the other end of the fourth rod is rotatably connected with the second wheel frame, so that the first rod, the second rod, The third rod member, the fourth rod member, the first wheel carrier and the second wheel carrier form the third link structure.

According to the stroller frame according to the first aspect of the present invention, the first locking mechanism includes a first pulling rope, a limit block, a second elastic member and a first locking block; the limit block, the first locking block Two elastic members and the first locking block are sequentially arranged on the first transmission rod, the limiting block is fixedly connected with the first transmission rod, and the first locking block is slidably inserted in the first transmission rod. On the first transmission rod, the first pulling rope connects the handrail rod and the first locking block, and the telescopic rod is provided with a first locking hole matched with the first locking block.

According to the stroller frame according to the first aspect of the present invention, the telescopic rod includes an outer tube and an inner tube inserted into the outer tube, and the second locking mechanism includes a locking tube, a third elastic member, a first a locking pin, a second locking block, a third locking block, a second pulling rope, a dial block and a second locking pin; the locking tube is inserted into the inner tube, and is arranged on the locking tube There is a first guide groove and a limiting portion, the second locking block is slidably arranged in the locking tube, and the second locking block is provided with a space between the second locking block and the first guide groove. A second guide slot with an included angle, the third elastic member is disposed between the second locking block and the limiting portion, and the third locking block is slidably disposed on the second locking block On the block, the first locking pin is arranged on the third locking block, and the first locking pin is inserted into the first guide groove and the second guide groove, and the outer tube is arranged on the There is a second locking hole matched with the third locking block, the dial is slidably arranged on the inner tube, and the second pull cord connects the dial and the second lock A stop block, the first transmission rod is provided with an arc-shaped third guide groove arranged around the first pivot shaft, and the distance between the third guide groove and the first pivot shaft is gradually clockwise. Increase or decrease, the second lock pin is arranged on the dial, and the second lock pin is inserted into the third guide groove.

According to a second aspect of the present invention, there is provided a stroller comprising the stroller frame as described above.

Additional aspects and advantages of the invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or learned by practice of the invention.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the utility model is further described;

Fig. 1 is the structural diagram of the baby carriage skeleton embodiment;

2 is a cross-sectional view of an embodiment of a stroller skeleton;

Figure 3 is another cross-sectional view of the baby carriage skeleton embodiment;

Fig. 4 is the enlarged view of A part in Fig. 3;

Fig. 5 is an enlarged view of part B in Fig. 3;

Figure 6 is an exploded view of an embodiment of a stroller skeleton;

Fig. 7 is the structure diagram of the armrest frame and the first transmission rod in the baby carriage skeleton embodiment;

8 is an exploded view of the armrest frame in the stroller skeleton embodiment;

Figure 9 is an exploded view of the telescopic rod in the stroller skeleton embodiment;

10 is a structural diagram of the first transmission rod in the embodiment of the stroller frame;

Figure 11 is a structural diagram of the baby carriage skeleton embodiment during the folding process;

Figure 12 is a structural diagram of the folded baby carriage skeleton embodiment;

FIG. 13 is a structural diagram of another perspective view of the embodiment of the stroller frame after being folded.

Detailed ways

This part will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. Understand each technical feature and overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

In the description of the present utility model, it should be understood that the orientation descriptions related to orientations, such as up, down, front, rear, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings, only It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the present invention, greater than, less than, exceeding, etc. are understood as not including this number, and above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution .

1 to 13 , the stroller frame according to the embodiment of the present invention includes an armrest frame 10 , a locking mechanism, a side frame and a transverse support frame 40 . The armrest frame 10 includes two armrest bars 11 connected by pivoting, a locking mechanism is provided on the armrest frame 10, and the relative rotation of the two armrest bars 11 can be restricted by the locking mechanism, and the side frames are arranged in two groups and can be folded, Two sets of side frames are respectively arranged on the left and right sides of the armrest frame 10 , wherein one set of side frames is pivotally connected to one of the armrest bars 11 , and the other set of side frames is pivotally connected to the other armrest. The transverse support frame 40 is connected between the two sets of side frames, and the transverse support frame 40 is arranged in a retractable structure.

Through the above structure, the side frame can be folded, the transverse support frame 40 can be folded in a telescopic manner, and the armrest frame 10 can be folded in a rotating manner, so that the width of the folded stroller frame can be reduced, which is convenient for storage and carrying.

Specifically, referring to FIG. 8 , the locking mechanism includes a pressing block 21 and a first elastic member (not shown in the figure), and limiting grooves 111 are provided on both of the two handrail bars 11 . During assembly, the pressing block 21 is inserted into the limiting grooves 111 on the two handrail bars 11 at the same time, and the first elastic member is located between the bottom surface of one of the limiting grooves 111 and the pressing block 21 . The lever 11 is locked to limit the relative rotation of the two handle bars 11 . By pressing the pressing block 21, the pressing block 21 moves away from one of the limiting grooves 111, the locking mechanism can be unlocked, and the two handle bars 11 can be rotated relative to each other. The pressing block 21 is sleeved on the pivot between the two handrails 11 , and the outer contour of the pressing block 21 can be set to be non-circular; or the center of the pressing block 21 deviates from the axis of the pivot between the two handrails 11 .

In some embodiments, the pressing block 21 may not be sleeved on the pivot between the two handle bars 11 .

The locking mechanism further includes a press cover 23 , a hook 231 is provided on the press cover 23 , a limit hole 112 communicated with the limit groove 111 is provided on the handrail 11 , and the hook 231 passes through the limit hole 112 and extends into the limiting groove 111 , the pressing cover 23 and the first elastic member are respectively disposed on both sides of the pressing block 21 . When the pressing cover 23 is pressed, the pressing block 21 can be moved by the pressing cover 23 to unlock the locking mechanism.

In some embodiments, the locking mechanism may be configured as a knob, the knob is screwed on one of the handle bars 11 , and a socket is provided on the other handle bar 11 , and the socket is offset from the pivot axis between the two handle bars 11 . axis, turn the knob, the knob can be inserted into the socket or the knob can be removed from the socket. In addition, the locking mechanism can also be configured as a structure such as a lock.

Referring to FIGS. 1 and 6 , there are four cross braces 40 , and each cross brace 40 includes two cross brace tubes 41 . In two of the transverse braces 40, the two transverse braces of the transverse braces 40 are assembled with each other to form a telescopic structure. In the other two transverse braces 40 , a mounting block 42 is provided at the end of one of the transverse braces 41 of the transverse braces 40 , and the other transverse brace 41 is slidably inserted into the mounting block 42 to form a telescopic structure.

Of course, in practical application, the number of the transverse braces 40 can be adjusted as required. For the above-mentioned two telescopic structures of the transverse braces 40 , their respective numbers can also be adjusted according to the situation.

The side frame includes a first transmission rod 31, a second transmission rod 32, a telescopic rod 33, a first wheel frame 34, a second wheel frame 35 and a seat frame 36. One end of the first transmission rod 31 , one end of the second transmission rod 32 and one end of the telescopic rod 33 are rotatably connected through a first pivot (not shown in the figure), and the other end of the second transmission rod 32 , the first wheel frame 34 The second wheel frame 35 is rotatably connected with the second wheel frame 35 through a second pivot (not shown in the figure), and the other end of the telescopic rod 33 is connected with the first wheel frame 34 through a third pivot shaft, so that the second transmission rod 32, the first wheel frame 34 are rotatably connected. The wheel frame 34 and the telescopic rod 33 form a first link structure. An unlockable first locking mechanism and a second locking mechanism are provided on the side frame, the first locking mechanism can limit the relative rotation of the first transmission rod 31 and the telescopic rod 33, and the second locking mechanism can limit the telescopic rod 33 telescopic. The first locking mechanism can be unlocked when the handrail 11 is rotated, and the second locking mechanism can be unlocked when the first transmission rod 31 is rotated. The seat frame 36 is connected with the first link structure through the second link structure, and the first wheel frame 34 and the second wheel frame 35 are connected with the second link structure through the third link structure.

Specifically, a first rod member 371 is provided on the side frame, one end of the first rod member 371 is pivotally connected to the seat frame 36, and the other end of the first rod member 371 is connected to the first wheel frame through a second pivot shaft 34 is pivotally connected, and the seat frame 36 is pivotally connected to the telescopic rod 33, so that the telescopic rod 33, the seat frame 36, the first rod 371 and the first wheel frame 34 form the second link structure.

A second rod 372, a third rod 373 and a fourth rod 374 are provided on the side frame. One end of the second rod 372 is pivotally connected to the middle of the first rod 371, and the second rod 372 The other end of the third rod 373 is pivotally connected to one end of the third rod 373, the middle of the third rod 373 is pivotally connected to the first wheel frame 34, and the other end of the third rod 373 is connected to the fourth rod 374 One end is pivotally connected, and the other end of the fourth rod 374 is pivotally connected with the second wheel frame 35, so that the first rod 371, the second rod 372, the third rod 373, the fourth rod The rod member 374 , the first wheel frame 34 and the second wheel frame 35 form the third link structure.

When the frame of the stroller is folded, the first locking mechanism can be unlocked by rotating the handle bar 11, the first transmission rod 31 can be rotated and folded relative to the telescopic rod 33; the second locking mechanism can be unlocked when the first transmission rod 31 is rotated , the telescopic rod 33 can be retracted to drive the action of the first link structure, the second link structure and the third link structure, the second transmission rod 32 and the telescopic rod 33 are rotated and folded relative to each other, the first wheel frame 34 and the second The wheel frame 35 is also rotated and folded relative to each other, and the seat frame 36 is rotated and folded, thereby completing the folding process of the side frame. The side frame can realize linkage folding, which can facilitate the folding operation of the frame of the stroller.

3 , 5 , 7 and 9 , the first locking mechanism includes a first pulling rope 511 , a limiting block 512 , a second elastic member 513 and a first locking block 514 . The limiting block 512 , the second elastic member 513 and the first locking block 514 are arranged in sequence, the limiting block 512 is fixedly connected with the first transmission rod 31 , and the first locking block 514 is slidably inserted on the first transmission rod 31 . The first pulling rope 511 connects the handrail 11 and the first locking block 514 , and the connection between the first pulling wire 511 and the handrail 11 is offset from the axis of the pivot between the handrail 11 and the first transmission rod 31 . The telescopic rod 33 is provided with a first locking hole 515 matched with the first locking block 514 . When the first locking mechanism is in the locked state, the first locking block 514 is inserted into the first locking hole 515 ; when the handrail 11 is rotated, the first pull rope 511 can be driven to move, and the first pull rope 511 pulls The first locking block 514 moves so that the first locking block 514 is separated from the first locking hole 515 , and at this time, the first locking mechanism can be unlocked.

In some embodiments, the first locking block 514 can be pivoted on the first transmission rod 31 , and a torsion spring can be provided. The two torsion arms of the torsion spring abut against the first locking block 514 and the first Transmission rod 31 . The first pulling rope 511 can pull the first locking block 514 to rotate, so as to move the first locking block 514 out of the first locking hole 515 .

3 , 4 , 9 and 10 , the telescopic rod includes an outer tube 331 and an inner tube 332 inserted into the outer tube 331 , and the second locking mechanism includes a locking tube 521 , a third elastic member 522 , a first The locking pin 523 , the second locking block 524 , the third locking block 525 , the second pulling rope 526 , the dial block 527 and the second locking pin 528 . The locking tube 521 is inserted into the inner tube 332, and the locking tube 521 is provided with a first guide groove 5211 and a limiting portion 5212, and the second locking block 524 is slidably disposed in the locking tube 521, and is located in the locking tube 521. The second locking block 524 is provided with a second guide groove 5241 . There is an included angle between the second guide groove 5241 and the first guide groove 5211, that is, the second guide groove 5241 is inclined or perpendicular to the first guide groove 5211. The third elastic member 522 is disposed between the second locking block 524 and the limiting portion 5212 , the third locking block 525 is slidably disposed on the second locking block 524 , and the first locking pin 523 is disposed on the third lock The first locking pin 523 is inserted into the first guide groove 5211 and the second guide groove 5241 . The outer tube 331 is provided with a second locking hole 3311 which is matched with the third locking block 525 . The dial block 527 is slidably disposed on the inner tube 332 , and the second pull cord 526 connects the dial block 527 and the second locking block 524 . The first transmission rod 31 is provided with an arc-shaped third guide groove 311 arranged around the first pivot axis. The distance between the third guide groove 311 and the first pivot axis gradually increases or decreases in the clockwise direction. The lock pin 528 is disposed on the dial block 527 , and the second lock pin 528 is inserted into the third guide groove 311 .

When the second locking mechanism is in the locked state, the third locking block 525 is inserted into the second locking hole 3311; when the first transmission rod 31 rotates relative to the telescopic rod 33, the second locking pin 528 moves along the third guide When the slot 311 moves, the distance between the second locking pin 528 and the second pivot is gradually changed, so that the dial 527 and the second pulling rope 526 move relative to the inner tube 332 , and the second locking can be pulled by the second pulling rope 526 The block 524 moves, and the first locking pin 523 moves along the first guide groove 5211 and the second guide groove 5241, so that the third locking block 525 moves out of the second locking hole 3311, so that the second locking mechanism can be unlocked.

Specifically, when the stroller frame is folded, the first transmission rod 31 rotates and folds forward relative to the telescopic rod 33 , and the distance between the third guide groove 311 and the first pivot gradually increases in the clockwise direction. Correspondingly, when the first transmission rod 31 is rotated and folded backward relative to the telescopic rod 33, the distance between the third guide groove 311 and the first pivot shaft gradually decreases in the clockwise direction.

In some embodiments, the third locking block 525 can be pivoted on the locking tube 521, and a torsion spring is provided, and the two torsion arms of the torsion spring are respectively abutted against the third locking block 525 and the locking tube 521 , the second pulling rope 526 is connected to the third locking block 525 . The third locking block 525 can be pulled to rotate by the second pulling rope 526 , so that the third locking block 525 can be moved out of the second locking hole 3311 .

When the frame of the stroller is in the unfolded state, the locking mechanism, the first locking mechanism and the third locking mechanism are all in the locked state, restricting the rotation between the two handrail bars 11, and further restricting the two groups of side frames from approaching each other, thereby also The telescopic motion of the horizontal brace 40 can be restricted.

A folding process of the stroller frame is as follows:

(1) Push the pressing block 21 to unlock the locking mechanism, press and rotate the handrail 11 to move the first pull rope 511 and unlock the first locking mechanism;

(2) Push the first transmission rod 31 to rotate and fold forward, so as to move the second pulling rope 526 and unlock the second locking mechanism;

(3) Under the action of the user's force and gravity, the inner tube 332 of the telescopic rod 33 retracts the outer tube 331, the first link structure moves, the second link structure and the third link structure also follow the action, the first link structure moves. The two transmission rods 32 and the telescopic rod 33 rotate and fold relative to each other, the first wheel frame 34 and the second wheel frame 35 also rotate and fold relative to each other, and the seat frame 36 rotates and folds;

(4) The two handrails 11 continue to rotate and fold relative to each other, and the transverse brace 40 is telescopic and folded, so as to reduce the width of the frame of the stroller after being folded.

The utility model also proposes a stroller, which includes a seat pocket (not shown in the figure) and the above-mentioned stroller frame, and the seat pocket is mounted on the side frame. Specifically, the seat pocket is connected with the seat frame 36 . Through the above structure, the stroller can be linked and folded, which is convenient for the user's folding operation, and the volume and width of the folded stroller are small, which is convenient for storage and transportation.

In the above-mentioned embodiment, the first elastic member, the second elastic member 513 and the third elastic member 522 can be configured as compression springs or other structures. In addition, a structure such as a glue block can also be used.

The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned embodiments, and within the knowledge scope possessed by those of ordinary skill in the technical field, the present utility model can also be used without departing from the purpose of the present utility model. make various changes.

Claims (10)

1. The baby carriage frame is characterized by comprising

The handrail frame comprises two handrail rods which are rotatably connected;

the locking mechanism is arranged on the handrail frame and can limit the relative rotation of the two handrail rods;

the foldable two groups of side frames are respectively arranged at the left side and the right side of the handrail frame, one group of side frames is rotationally connected with one handrail rod, and the other group of side frames is rotationally connected with the other handrail rod;

and the cross-bracing frames are connected between the two groups of side frames and are arranged into telescopic structures.

2. A stroller frame according to claim 1, wherein the locking mechanism comprises a pressing piece and a first elastic member, the two rods are provided with a limiting groove, the pressing piece is simultaneously inserted into the limiting grooves of the two rods, and the first elastic member is located between the bottom surface of one of the limiting grooves and the pressing piece.

3. The stroller frame according to claim 2, wherein the locking mechanism further comprises a pressing cover, the pressing cover is provided with a hook, one of the grab bars is provided with a limiting hole communicated with the limiting groove, the hook passes through the limiting hole and extends into the limiting groove, and the pressing cover and the first elastic member are respectively arranged at two sides of the pressing block.

4. The stroller frame according to claim 1, wherein the cross-brace comprises two cross-brace tubes, wherein the end of one of the cross-brace tubes is provided with a mounting block, and the other cross-brace tube is slidably inserted into the mounting block;

or the two cross-brace pipes of the cross-brace frame are sleeved with each other.

5. The stroller frame of claim 1, wherein the side frame comprises a first drive link, a second drive link, a telescoping link, a first wheel carrier, a second wheel carrier, and a seat frame;

one end of the first transmission rod, one end of the second transmission rod and one end of the telescopic rod are rotatably connected through a first pivot, the other end of the second transmission rod, the first wheel carrier and the second wheel carrier are rotatably connected through a second pivot, and the other end of the telescopic rod is rotatably connected with the first wheel carrier through a third pivot, so that the second transmission rod, the first wheel carrier and the telescopic rod form a first connection rod structure;

the side frame is provided with a first locking mechanism and a second locking mechanism which can be unlocked, the first locking mechanism can limit the relative rotation of the first transmission rod and the telescopic rod, the second locking mechanism can limit the extension and retraction of the telescopic rod, the first locking mechanism can be unlocked when the grab bar rotates, and the second locking mechanism can be unlocked when the first transmission rod rotates;

the seat frame is connected with the first connecting rod structure through a second connecting rod structure, and the first wheel frame and the second wheel frame are connected with the second connecting rod structure through a third connecting rod structure.

6. A stroller frame according to claim 5, wherein a first rod is disposed on the side frame, one end of the first rod is rotatably connected to the seat frame, the other end of the first rod is rotatably connected to the first wheel frame via the second pivot, and the seat frame is rotatably connected to the telescopic rod, so that the telescopic rod, the seat frame, the first rod and the first wheel frame form the second link structure.

7. The stroller frame according to claim 6, wherein a second bar, a third bar and a fourth bar are disposed on the side frame, one end of the second bar is rotatably connected to a middle portion of the first bar, the other end of the second bar is rotatably connected to one end of the third bar, a middle portion of the third bar is rotatably connected to the first wheel frame, the other end of the third bar is rotatably connected to one end of the fourth bar, and the other end of the fourth bar is rotatably connected to the second wheel frame, such that the third link structure is formed by the first bar, the second bar, the third bar, the fourth bar, the first wheel frame and the second wheel frame.

8. The stroller frame according to claim 5, wherein the first latch mechanism comprises a first pull cord, a stopper, a second elastic member, and a first latch;

the limiting block, the second elastic component and first locking piece arrange in proper order on the first drive lever, the limiting block with first drive lever fixed connection, first locking piece slides and inserts and locates on the first drive lever, first stay cord is connected the bar with first locking piece, be provided with on the telescopic link with first locking hole of first locking piece matched with.

9. The stroller frame according to claim 5 or 8, wherein the telescopic rod comprises an outer tube and an inner tube inserted into the outer tube, and the second locking mechanism comprises a locking tube, a third elastic member, a first lock pin, a second lock block, a third lock block, a second pull rope, a shift block and a second lock pin;

the locking pipe is inserted in the inner pipe, a first guide groove and a limiting part are arranged on the locking pipe, the second locking block is slidably arranged in the locking pipe, a second guide groove with an included angle with the first guide groove is arranged on the second locking block, the third elastic piece is arranged between the second locking block and the limiting part, the third locking block is slidably arranged on the second locking block, the first locking pin is arranged on the third locking block, the first locking pin is inserted in the first guide groove and the second guide groove, a second locking hole matched with the third locking block is arranged on the outer pipe, the shifting block is slidably arranged on the inner pipe, the second pull rope is connected with the shifting block and the second locking block, and a third guide groove which is arranged around the first pivot and is arc-shaped is arranged on the first transmission rod, the distance between the third guide groove and the first pivot gradually increases or decreases along the clockwise direction, the second lock pin is arranged on the shifting block, and the second lock pin is inserted in the third guide groove.

10. Child stroller, characterized in that it comprises a stroller frame according to any of claims 1 to 9.

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