CN114435452A

CN114435452A - Baby stroller and folding method thereof

Info

Publication number: CN114435452A
Application number: CN202210279979.5A
Authority: CN
Inventors: 胡杰
Original assignee: Mamas and Papas Holdings Ltd
Current assignee: Mamas and Papas Holdings Ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2022-05-06
Also published as: CN110667682B; CN110667682A

Abstract

The invention discloses a baby stroller which comprises a seat frame assembly and a baby stroller frame, wherein the seat frame assembly comprises a first back part, a second back part, a seat part, a switch unit, an upper rotating joint connected between the first back part and the second back part, and a lower rotating joint connected between the second back part and the seat part, the switch unit is arranged on a cross beam between the first back part and the second back part, the cross beam is connected with the upper rotating joint, and the switch unit can unlock the upper rotating joint and the lower rotating joint. The invention also discloses a folding method of the baby stroller frame. After the upper rotating joint and the lower rotating joint are unlocked, the first back part and the second back part rotate relative to the seat part to be folded, so that the independent folding operation of the seat frame assembly is realized, the stroller frame can be independently folded or unfolded relative to the stroller frame, the adjustment is convenient, and the stroller frame is suitable for different use states and requirements.

Description

Baby stroller and folding method thereof

Divisional application statement

The application is a divisional application of a Chinese invention patent application with application number 201910893521.7 and invented name "baby stroller and folding method thereof", which is filed on 20/09/2019.

Technical Field

The invention relates to the technical field of baby strollers, in particular to a baby stroller and a folding method thereof.

Background

The folding mode of the existing baby stroller frame is complex, and the baby stroller frame is not easy to operate by a user.

In addition, the existing baby stroller frame is not provided with a seat frame assembly which can be independently folded. When the baby stroller is folded, the seat frame is folded together, the seat frame can not be adjusted independently, and the flexibility is poor.

Therefore, there is a need for a stroller and a method for folding a stroller that is easy to operate and fold, and that can independently fold, fold and adjust the seat frame assembly.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a baby stroller and a folding method of the baby stroller, wherein the baby stroller is convenient to operate and fold, and the seat frame assembly can be independently folded, folded and adjusted.

The invention provides a baby stroller, which comprises a seat frame assembly and a baby stroller frame, wherein the seat frame assembly comprises a first back part, a second back part, a seat part, a switch unit, an upper rotating joint connected between the first back part and the second back part, and a lower rotating joint connected between the second back part and the seat part, the switch unit is arranged on a cross beam between the first back part and the second back part, the cross beam is connected with the upper rotating joint, and the switch unit can unlock the upper rotating joint and the lower rotating joint.

Further, the air conditioner is provided with a fan,

when the folding seat is folded, after the switch unit is operated, the switch unit drives the upper rotating joint and the lower rotating joint to be unlocked, so that the first back part can be folded in a rotating mode relative to the second back part, and the second back part can be folded in a rotating mode relative to the seat part;

when the seat is unfolded, the first back part is rotated, the upper rotating joint locks the first back part after the first back part is rotated and unfolded in place relative to the second back part, and the lower rotating joint locks the second back part after the second back part is rotated and unfolded in place relative to the seat part.

Furthermore, the switch unit comprises a turnover part, a return spring and a steel wire, the turnover part is rotatably connected with the cross beam, the return spring is installed between the turnover part and the cross beam, one end of the steel wire is connected with the turnover part, and the other end of the steel wire is connected with the upper rotating joint and the lower rotating joint;

when the turnover piece rotates, the turnover piece pulls the steel wire, and the steel wire drives the upper rotating joint and the lower rotating joint to be unlocked.

Further, the lower rotary joint comprises a first shell, a second shell, a rotary shaft, a locking pin and a locking groove;

the first housing is connected to the second back portion, the second housing is connected to the seat portion, the rotating shaft is connected to the first housing and the second housing, the first housing is rotatable about the rotating shaft, the locking pin is connected to the switch unit and mounted between the first housing and the second housing, and the locking groove is formed on the second housing;

when locked, the locking pin is inserted into the locking groove;

when the lock is unlocked, the switch unit drives the locking pin to be disengaged from the locking groove.

Further, the lower rotating joint further comprises a sliding groove shell, a sliding part and a clamping jaw plate, the sliding groove shell is connected between the second back and the second shell, the sliding groove shell is connected with the switch unit, one end of the locking pin is fixed on the sliding part, the other end of the locking pin penetrates through the limiting groove of the sliding groove shell and can be followed by the sliding groove shell to slide, the clamping jaw plate is installed on the second shell, a plurality of clamping grooves in the clamping jaw plate correspond to the locking groove, and the other end of the locking pin penetrates through the sliding groove shell and then is inserted into the clamping grooves and the locking groove.

Further, the upper rotating joint comprises a first rotating piece, a second rotating piece and a cam, the first rotating piece is connected with the first back part, the second rotating piece is connected with the second back part, and the first rotating piece is rotatably connected with the second rotating piece;

when the upper rotating joint is locked, the cam is positioned between the first rotating piece and the second rotating piece along the axis direction;

the switch unit can drive the cam to be separated from the first rotating piece or the second rotating piece along the axis direction, and the upper rotating joint is unlocked.

Further, baby's shallow frame includes push-up rod, lower push rod, fore-stock, after-poppet, first revolute joint, second revolute joint and unblock trigger mechanism, unblock trigger mechanism installs on the push-up rod, the lower extreme of push-up rod with pass through between the upper end of lower push rod first revolute joint connects, the lower extreme of lower push rod with the fore-stock the upper end of after-poppet passes through second revolute joint connects, unblock trigger mechanism is used for triggering first revolute joint unblock rotates the push rod after-poppet the second revolute joint unblock.

Furthermore, the unlocking trigger mechanism comprises a key, and the unlocking trigger mechanism is used for unlocking after the key is pressed and drives the first rotating joint to unlock through rotation;

the unlocking trigger mechanism further comprises an upper semicircular shell, a telescopic piece, a spring and a lower semicircular shell, the upper semicircular shell and the lower semicircular shell are spliced to form a cylindrical pipe, one part of the key extends out of the lower semicircular shell, the key is installed between the lower semicircular shell and the spring, the telescopic piece is connected with the upper semicircular shell, and two ends of the telescopic piece are respectively connected with upper steel wires;

after the key is pressed, the unlocking trigger mechanism is unlocked, the key, the upper semicircular shell and the lower semicircular shell compress the telescopic piece after rotating, and the telescopic piece pulls the upper steel wire to drive the first rotating joint to unlock.

Furthermore, the upper push rod comprises an inner tube and an outer tube, and the cylindrical tube is sleeved outside the inner tube;

the unlocking triggering mechanism further comprises a sleeve, the sleeve is fixedly connected with the outer pipe, two ends of the cylindrical pipe are respectively inserted into the sleeve and can rotate, a locking groove is formed in the sleeve, locking blocks extend from two ends of the key and are inserted into the locking grooves, when the key is pressed, the locking blocks are separated from the locking grooves, and the cylindrical pipe can rotate relative to the sleeve.

Furthermore, the telescopic part comprises a first connecting part, a second connecting part, a first telescopic rod and a second telescopic rod, the first connecting part is connected with one end of the first telescopic rod, the second connecting part is connected with one end of the second telescopic rod, the other end of the first telescopic rod is connected with the other end of the second telescopic rod, the first connecting part and the second connecting part are respectively connected with one upper steel wire, and slope bosses are arranged on the first connecting part and the second connecting part;

two slope grooves are formed in the upper semicircular shell, the slope bosses are embedded into the slope grooves, and when the upper semicircular shell rotates, the slope grooves push the two slope bosses to drive the first telescopic rod and the second telescopic rod to mutually approach and retract.

Further, the first rotating joint comprises an upper push rod rotating shell, a lower push rod rotating shell and an upper locking piece;

the upper push rod rotating shell is connected with the lower end of the upper push rod, the lower push rod rotating shell is connected with the upper end of the lower push rod, the upper locking piece is connected with the unlocking trigger mechanism through an upper steel wire, and the first rotating joint is unlocked when the upper steel wire pulls the upper locking piece;

the first rotary joint also comprises a gear, a first gear groove is arranged in the upper push rod rotary shell, a second gear groove is arranged in the lower push rod rotary shell,

the gear is embedded into the first gear groove and the second gear groove when the first rotary joint is locked;

when the upper locking piece moves upwards, the gear is separated from the first gear groove or the second gear groove, and the first rotating joint is unlocked.

Furthermore, the second rotating joint comprises a lower steel wire and a lower locking piece, and after the upper push rod rotates, the lower steel wire pulls the lower locking piece to unlock the second rotating joint;

the second rotating joint comprises a lower push rod rotating piece, a front support rotating piece and a rear support rotating piece;

the lower push rod rotating part is connected with the lower end of the lower push rod, and the lower push rod rotating part is rotatably connected with the front support rotating part through a first rotating shaft;

the front support rotating piece is connected with the upper end of the front support, and the front support rotating piece is rotatably connected with the rear support rotating piece through a second rotating shaft;

the rear support rotating piece is connected with the upper end of the rear support;

the lower push rod rotating piece, the front support rotating piece and the rear support rotating piece are all provided with lower locking grooves, the lower locking piece is inserted into the lower locking grooves, and the second rotating joint is locked.

The present invention also provides a method of collapsing a stroller for use with any of the above strollers, comprising the steps of:

operating the switch unit to unlock the upper rotary joint and the lower rotary joint;

turning the first back part forwards and downwards to enable the first back part to approach the second back part;

turning the second back part forwards and downwards to enable the second back part to approach the seat part;

operating the unlocking trigger mechanism to unlock the first rotating joint;

the upper push rod is turned backwards and downwards to be close to the lower push rod;

the second rotary joint is unlocked, and the lower push rod is turned forwards and downwards to be close to the front support;

and lifting the handle hole on the seat frame assembly, and folding the front support and the rear support.

After adopting above-mentioned technical scheme, have following beneficial effect:

after the upper rotating joint and the lower rotating joint are unlocked, the first back part and the second back part rotate relative to the seat part to be folded, so that the independent folding operation of the seat frame assembly is realized, the stroller frame can be independently folded or unfolded relative to the stroller frame, the adjustment is convenient, and the stroller frame is suitable for different use states and requirements.

Drawings

The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

FIG. 1 is a perspective view of a stroller in accordance with one embodiment of the present invention;

FIG. 2 is an enlarged, fragmentary view of a stroller in accordance with one embodiment of the present invention;

FIG. 3 is a perspective view of a seat frame assembly in accordance with one embodiment of the present invention;

FIG. 4 is an enlarged partial view of a seat frame assembly at the switch unit in accordance with one embodiment of the present invention;

FIG. 5 is a perspective view of a tumbler of a switch unit of the seat frame assembly in a first embodiment of the invention;

FIG. 6 is a perspective view of the seat frame assembly with the tumblers omitted from the switch unit in accordance with a first embodiment of the present invention;

FIG. 7 is an enlarged partial view of the seat frame assembly at the lower revolute joint according to one embodiment of the present invention;

FIG. 8 is an exploded view of the seat frame assembly at the lower revolute joint according to one embodiment of the present invention;

FIG. 9 is a schematic view of the structure at the lower revolute joint of the seat frame assembly according to the first modification of the first embodiment of the present invention;

FIG. 10 is an exploded view of a side of the seat frame assembly at the lower revolute joint in a variation of the first embodiment of the present invention;

FIG. 11 is an exploded view of the other side of the seat frame assembly at the lower revolute joint in a variation of the first embodiment of the present invention;

FIG. 12 is an enlarged partial view of the seat portion of the seat frame assembly in a modification of the first embodiment of the present invention;

FIG. 13 is an exploded view of one side of the upper pivot joint of the seat frame assembly in accordance with one embodiment of the present invention;

FIG. 14 is an exploded view of the other side of the upper pivot joint of the seat frame assembly in accordance with one embodiment of the present invention;

FIG. 15 is a perspective view of the stroller frame in an expanded state according to the first embodiment of the present invention;

FIG. 16 is a top exploded view of the release trigger mechanism of the stroller frame according to one embodiment of the present invention;

FIG. 17 is an exploded bottom view of the release trigger mechanism of the stroller frame according to one embodiment of the present invention;

FIG. 18 is an exploded left view of the first pivot joint of the stroller frame in accordance with one embodiment of the present invention;

FIG. 19 is an exploded view from the right of the first pivot joint of the stroller frame in accordance with one embodiment of the present invention;

FIG. 20 is an enlarged view of a portion of the first pivot joint of the stroller frame according to the first embodiment of the present invention;

FIG. 21 is a left perspective exploded view of FIG. 20;

FIG. 22 is a right perspective exploded view of FIG. 20;

FIG. 23 is a perspective view of a second pivot joint of the stroller frame according to the first embodiment of the present invention;

FIG. 24 is an exploded left view of the second pivot joint of the stroller frame in accordance with one embodiment of the present invention;

FIG. 25 is an exploded view from the right of the second pivot joint of the stroller frame in accordance with the first embodiment of the present invention;

FIG. 26 is an enlarged view of a second pivot joint of the stroller frame according to the first embodiment of the present invention;

FIG. 27 is an enlarged fragmentary view of FIG. 26 with the rear fork omitted;

FIG. 28 is a partial enlarged view of FIG. 27 with the lower push rod rotating member and lower locking member omitted;

FIG. 29 is an enlarged fragmentary view of FIG. 28 with the front carrier rotating member omitted;

FIG. 30 is a perspective view of the stroller frame in a folded state according to the first embodiment of the present invention;

FIG. 31 is a perspective view of the stroller in an expanded configuration in accordance with one embodiment of the present invention;

FIG. 32 is a perspective view of the stroller in a collapsed state according to one embodiment of the present invention;

FIG. 33 is an enlarged, fragmentary view of a stroller in accordance with a first embodiment of the present invention;

FIG. 34 is an enlarged, partially schematic, rear perspective view of a stroller in accordance with a variation of the first embodiment of the present invention;

FIG. 35 is a top partially enlarged view of the stroller in accordance with a variation of the first embodiment of the present invention;

fig. 36 is a flow chart illustrating a method for folding the stroller in accordance with a second embodiment of the present invention.

Reference symbol comparison table:

the seat frame assembly 10:

first back 11: a second through hole 111;

seat portion 12: the seat plate 121, the extension rod 122, the first connecting column 123, the shielding plate 124, the mounting groove 125, the embedded groove 1211 and the handle hole 1212;

lower revolute joint 13: the locking mechanism comprises a first shell 131, a second shell 132, a rotating shaft 133, a locking pin 134, a locking groove 135, a sliding groove shell 136, a sliding piece 137, a jaw plate 138, a cross bar 139, a guide groove 1321, a second connecting column 1322, a limiting groove 1361, a third steel wire hole 1362, a second steel wire hole 1371, a pin hole 1372, a limiting block 1373 and a clamping groove 1381;

the switching unit 14: the turnover piece 141, the return spring 142, the steel wire 143, the first steel wire hole 1411, the first hinge 1412, the first steel wire 143a, and the second steel wire 143 b;

a grab rail 15;

the cross beam 16: a second hinge 161;

ceiling unit 17: a ceiling lever 171, a ceiling rotor 172, and a ceiling cloth 173;

a second back 18;

upper revolute joint 19: the first rotating member 191, the second rotating member 192, the cam 193, the cam slot 1921, the sliding shaft 1922, and the fourth wire hole 1931;

the baby stroller frame 20: an upper push rod 21, a lower push rod 22, a front bracket 23, a rear bracket 24, a first rotating joint 25, a second rotating joint 26, an unlocking trigger mechanism 27, a first connecting rod 28, a second connecting rod 29a and a third connecting rod 29 b;

the upper push rod 21: inner tube 211, outer tube 212;

first rotary joint 25: an upper push rod rotating housing 251, a lower push rod rotating housing 252, an upper locking piece 253, a gear 254, an upper cover plate 255, a spring mounting seat 256, a pushing spring 257, a reset piece 258, a first gear groove 2511, an entry groove 2512, a second gear groove 2521, an upper locking block 2531, an upper locking groove 2541, a first slope 2542, a slot 2543, an insertion arm 2561, a lower wire hook 2581 and a second slope 2582;

second rotary joint 26: a lower wire 261, a lower locking member 262, a lower push rod rotation member 263, a front bracket rotation member 264, a rear bracket rotation member 265, a first rotation shaft 266, a second rotation shaft 267, a lower locking groove 268, a lower cover plate 269, a return spring 2611, a front fork 2641, and a rear fork 2651;

unlock trigger mechanism 27: the button 271, last semicircular shell 272, extensible member 273, lower semicircular shell 274, sleeve pipe 275, spring mounting piece 276, locking piece 2711, spring mounting post 2712, sand grip 2713, slope groove 2721, go up inserted sheet 2722, first connecting piece 2731, second connecting piece 2732, first telescopic link 2733, second telescopic link 2734, slope boss 2735, press key hole 2741, guide slot 2742, inserted sheet 2743 down, locking groove 2751, spring groove 2761.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings.

It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

The "front", "rear", "up", "down", "left" and "right" directions in the present invention are based on the orientation of the stroller.

The first embodiment is as follows:

referring to fig. 1-2, a schematic structural view of a stroller frame according to a first embodiment of the present invention is shown.

The stroller includes a stroller frame 20, the stroller frame 20 includes a push rod 21, a front support 22, a rear support 23, a wheel 24 and a grab bar 15, and a seat frame assembly 10, and the seat frame assembly 10 is mounted on the stroller frame 20.

The stroller frame 20 further includes a frame turning joint 26, and the front frame 22, the rear frame 23 and the push rod 21 are connected via the frame turning joint 26 and are rotatably foldable. The folding operation of the stroller frame 20 and the seat frame assembly 10 is two completely independent modes of operation.

When it is desired to fold the entire stroller, the seat frame assembly 10 is folded first, and then the stroller frame 20 is folded.

Further, as shown in fig. 1-2, the front bracket 22 is rotatably connected to the seat portion 12, the lower rotary joint 13 is rotatably connected to the push rod 21 through a first connecting rod 25, the grab bar 15 is rotatably connected to the seat portion 12, the grab bar 15 extends out of a second connecting rod 28, and the second connecting rod 28 is rotatably connected to the first connecting rod 25 through a third connecting rod 29.

Specifically, as shown in fig. 2, the seat portion 12 is provided with a first connection column 123, and the front bracket 22 is rotatably connected to the seat plate 121 through the first connection column 123.

Three-point positioning of the seat frame assembly 10 is achieved by the first connecting post 123, the point of connection of the grab bar 15 to the seat portion 12, and the third connecting rod 29 and the point of connection between the first connecting rod 25 and the lower revolute joint 13.

By implementing the present embodiment, the seat frame assembly 10 can be positioned, and the seat frame assembly 10 and the stroller frame 20 can be folded and folded independently, so that the adjustment flexibility is increased, and different requirements of users can be met.

A seat frame assembly:

fig. 3-14 are schematic structural views of a seat frame assembly according to an embodiment of the invention.

A seat frame assembly 10 for a stroller includes a first back portion 11, a second back portion 18, a seat portion 12, a switch unit 14, an upper pivot joint 19 connected between the first back portion 11 and the second back portion 18, and a lower pivot joint 13 connected between the second back portion 18 and the seat portion 12, the switch unit 14 being mounted on a cross member 16 between the first back portion 11 and the second back portion 18, the cross member 16 being connected to the upper pivot joint 19, the switch unit 14 being capable of unlocking the upper pivot joint 19 and the lower pivot joint 13.

During folding, after the switch unit 14 is operated, the switch unit 14 drives the upper rotating joint 19 and the lower rotating joint 13 to unlock, so that the first back part 11 can be folded in a rotating way relative to the second back part 18, and the second back part 18 can be folded in a rotating way relative to the seat part 12;

when the seat portion 12 is unfolded, the upper rotary joint 19 locks the first back portion 11 after the first back portion 11 is rotated and unfolded in position relative to the second back portion 18, and the lower rotary joint 13 locks the second back portion 18 after the second back portion 18 is rotated and unfolded in position relative to the seat portion 12.

When folding is needed, the switch unit 14 is operated, and the switch unit 14 drives the upper rotating joint 19 and the lower rotating joint 13 to unlock;

then, the first back 11 is rotated toward the direction approaching the second back 18 until the first back 11 is rotated to a position almost parallel to the second back 18;

the first back 11 and the second back 18 are then rotated together toward the seat 12 until the first back 11 and the second back 18 are rotated to a substantially horizontal position relative to the seat 12.

When the seat frame assembly 10 needs to be unfolded again, the first back part 11 and the second back part 18 are rotated towards the direction away from the seat part 12 until the proper unfolding angle is adjusted, and the lower rotating joint 13 is locked again; the first back 11 is then turned upwards with respect to the second back 18 until the first back 11 and the second back 18 are aligned and the upper revolute joint 19 is locked again.

In this embodiment, after the upper rotating joint 19 and the lower rotating joint 13 are unlocked, the first back 11 and the second back 18 rotate to be folded relative to the seat 12, so as to realize the operation of independently folding and folding the seat frame assembly, and can be independently folded or unfolded relative to the stroller frame, which is convenient to adjust and suitable for different use states and requirements.

As shown in fig. 3, the first back 11 includes a hollow U-shaped rod, and two ends of the U-shaped rod are connected to two upper revolute joints 19.

Specifically, the first back 11 is a complete U-shaped bar, and the U-shaped bar is installed upside down when unfolded, and two ends of the U-shaped bar are respectively connected with the upper rotating joint 19.

When the baby stroller is in actual use, the U-shaped rod is sleeved with a backrest cloth or a backrest plate for supporting the back of a baby.

Optionally, the first back 11 may also have other structures, such as: the U-shaped bar is replaced by a back rest that is capable of supporting the head of the infant.

Further, as shown in fig. 3, the second back portion 18 is two straight bars respectively connected to two ends of the U-shaped first back portion 11. The first back portion 11 and the second back portion 18 are connected by an upper rotating joint 19, the two upper rotating joints 19 are connected by a cross beam 16, and the switch unit 14 is mounted on the cross beam 16.

Further, as shown in fig. 4 to 6, the switch unit 14 includes a flip 141, a return spring 142 and a steel wire 143, the flip 141 is rotatably connected to the cross beam 16, the return spring 142 is installed between the flip 141 and the cross beam 16, one end of the steel wire 143 is connected to the flip 141, and the other end is connected to the upper rotary joint 19 and the lower rotary joint 13;

when the turning piece 141 is rotated, the turning piece 141 pulls the steel wire 143, and the steel wire 143 drives the upper turning joint 19 and the lower turning joint 13 to be unlocked.

Specifically, as shown in fig. 5 to 6, the turning member 141 includes a first wire hole 1411 and a first hinge portion 1412, the first wire hole 1411 is fixedly connected to one end of the wire 143, and the first hinge portion 1412 is rotatably connected to the second hinge portion 161 of the cross member 16. One end of the return spring 142 is connected to the turning piece 141, and the other end is connected to the cross member 16.

When the tumblers 141 are tumbled toward the rear of the seat frame assembly 10, the tumblers 141 rotate about the first hinge portion 1412 and pull the wire 143, the wire 143 unlocks the upper and lower

revolute joints

19 and 13, and the tumblers 141 are tumbled, stretching the return spring 142. When the flip member 141 is released, the return spring 142 brings the flip member 141 to return to the original position.

Further, as shown in fig. 6, the steel wire 143 includes a first steel wire 143a and a second steel wire 143b, the first steel wire 143a is connected to the upper rotary joint 19, and the second steel wire 143b is connected to the lower rotary joint 13.

The first wire holes 1411 of the turnover member 141 are two and are connected to one total wire 143, and one total wire 143 is divided into two, that is, a first wire 143a and a second wire 143b, the first wire 143a is connected to the upper rotary joint 19, and the second wire 143b is connected to the lower rotary joint 13. When the turnover piece 141 is turned over, the upper rotating joint 19 and the lower rotating joint 13 can be driven to unlock at the same time.

Alternatively, the steel wire 143 may have only one strand, and the first steel wire holes 1411 of the turnover member 141 are respectively connected to one steel wire 143, and each steel wire 143 simultaneously drives the upper revolute joint 19 and the lower revolute joint 13 to unlock.

Further, as shown in fig. 3 and fig. 7 to 8, the lower rotary joint 13 includes a first housing 131, a second housing 132, a rotating shaft 133, a locking pin 134, and a locking groove 135;

the first housing 131 is connected with the second back 18, the second housing 132 is connected with the seat 12, the rotation shaft 133 connects the first housing 131 and the second housing 132, the first housing 131 can rotate about the rotation shaft 133, the locking pin 134 is connected with the switch unit 14 and installed between the first housing 131 and the second housing 132, and the locking groove 135 is formed on the second housing 132;

when locked, the locking pin 134 is inserted into the locking groove 135;

when unlocked, the switch unit 14 pulls the locking pin 134 out of the locking groove 135.

Specifically, as shown in fig. 2, the first housing 131 and the second housing 132 are both disc-shaped, the first housing 131 and the second housing 132 are fastened to form an installation cavity, and the locking pin 134 and the locking groove 135 are both installed in the installation cavity.

The lower rotary joints 13 are provided in two, which are respectively located on the left and right sides of the second back 18 and the seat 12, and the two first housings 131 are connected by a cross bar 139, so that the cross bar 139, the two first housings 131, the second back 18, and the switch unit 14 are integrated to rotate together.

The two second housings 132 are integrally connected to the seat 12, and the second housings 132 and the seat plate 121 of the seat 12 may be integrally injection molded during the actual process.

A plurality of hollowed-out parts are formed on the seat board 121, and seat pad cloth can be coated outside the seat board 121, so that the comfort is improved. The hollow part can increase the air permeability of the seat plate 121, and can also reduce the weight and the cost. While also providing sufficient support stability.

The locking groove 135 includes three and is equally radially distributed around the center of the second housing 132. The plurality of locking slots 135 facilitates adjustment of the angle between the second back portion 18 and the seat portion 12, and the locking pin 134 can be snapped into any one of the locking slots 135 to meet different needs of the user. The user can adjust the second back 18 and the first back 11 to lie flat, half lie, sitting.

Further, as shown in fig. 7 to 8, the lower revolute joint 13 further includes a sliding groove shell 136, a sliding member 137 and a jaw plate 138, the sliding groove shell 136 is connected between the second back portion 18 and the second shell 132, wherein the sliding groove shell 136 includes a third wire hole 1362, and the other end of the second wire 143b is fixedly connected to the third wire hole 1362. The third steel wire hole 1362 of the sliding groove shell 136 is connected with the switch unit 14 through the second steel wire 143b, one end of the locking pin 134 is fixed on the sliding member 137, the other end of the locking pin passes through the limiting groove 1361 of the sliding groove shell 136 and can slide along the sliding groove shell 136, the jaw plate 138 is installed on the second housing 132, three clamping grooves 1381 completely matched with the shape of the locking groove 135 are arranged on the jaw plate 138, a plurality of clamping grooves 1381 on the jaw plate 138 correspond to the locking groove 135, and the other end of the locking pin 134 passes through the sliding groove shell 136 and then is inserted into the clamping grooves 1381 and the locking groove 135.

Specifically, the sliding groove shell 136 is fixedly connected with the lower end of the second back 18, a semicircular groove is formed on the sliding groove shell 136, the sliding member 137 is oval, and the sliding member 137 is at least partially inserted into the sliding groove shell 136.

When the second steel wire 143b is pulled, the sliding housing 136 is moved upward.

When the sliding groove shell 136 is pulled upwards, the locking pin 134 is driven to slide upwards, the locking pin 134 drives the sliding piece 137 to slide upwards, the locking pin 134 is disengaged from the locking groove 135, and the lower rotary joint 13 is unlocked.

The jaw plate 138 is connected to the second housing 132 by screws.

The sliding channel housing 136 is further connected with a reset member, which moves the sliding channel housing 136 downward when the user releases the flip member 141, keeping the locking pins 134 snapped into the catching grooves 1381 and the locking grooves 135. The reset member may be a reset spring.

In this embodiment, the sliding member 137, the sliding groove housing 136, and the locking pin 134 are integrally connected to the first housing 131, and the latch plate 138 and the locking groove 135 are integrally connected to the second housing 132. The two parts are locked by the matching of the locking pin 134 with the locking groove 135 and the clamping groove 1381, and when the locking pin 134 is disengaged from the locking groove 135 and the clamping groove 1381, the locking is realized, the second back part 18 can rotate relative to the seat part 12, and the angle adjustment or the complete folding of the second back part 18 can be realized.

Alternatively, as shown in fig. 9 to 11, a schematic structural view of the lower revolute joint 13 in the modification is shown.

The lower rotary joint 13 includes a first housing 131, a second housing 132, a rotating shaft 133, a locking pin 134, and a locking groove 135;

when locked, the locking pin 134 is inserted into the locking groove 135;

when unlocked, the switch unit 14 drives the locking pin 134 out of the locking groove 135.

Specifically, as shown in fig. 3 and 9, the first housing 131 and the second housing 132 are both disc-shaped, the first housing 131 and the second housing 132 are buckled to form an installation cavity, and the locking pin 134 and the locking groove 135 are both installed in the installation cavity.

As shown in fig. 10, the locking grooves 135 include four, equally radially distributed around the center of the second housing 132. The plurality of locking slots 135 facilitates adjustment of the angle between the second back portion 18 and the seat portion 12, and the locking pin 134 can be snapped into any one of the locking slots 135 to meet different needs of the user. The user can adjust the second back 18 to lie flat, semi-lie, sitting.

Further, as shown in fig. 9 to 11, the lower rotary joint 13 further includes a slide groove housing 136, a slider 137, and a jaw plate 138, the slide groove housing 136 is connected between the second back portion 18 and the second housing 132, the slider 137 is connected with the switch unit 14 and can slide along the slide groove housing 136, the jaw plate 138 is mounted on the second housing 132, a plurality of catching grooves 1381 on the jaw plate 138 correspond to the locking groove 135, one end of the locking pin 134 is mounted on the slider 137, and the other end is inserted into the catching groove 1381 and the locking groove 135.

Specifically, the sliding groove housing 136 is fixedly connected with the end of the U-shaped rod, a semicircular groove is formed on the sliding groove housing 136, the sliding member 137 is oval, and at least a part of the sliding member 137 is inserted into the sliding groove housing 136.

The sliding member 137 includes a second steel wire hole 1371, and the other end of the second steel wire 143b is fixedly connected to the second steel wire hole 1371. When the second steel wire 143b is pulled, the slider 137 is brought to slide upward.

The sliding member 137 further includes a pin hole 1372, the locking pin 134 is inserted into the pin hole 1372 and is fixedly connected, when the sliding member 137 slides upwards, the locking pin 134 is driven to slide upwards together, the locking pin 134 is released from the locking groove 135, and the lower rotary joint 13 is unlocked.

Four locking grooves 1381 completely matching the shape of the locking groove 135 are formed on the jaw plate 138, and the jaw plate 138 is connected to the second housing 132 by screws.

As shown in fig. 11, the sliding member 137 further includes a limiting block 1373, the sliding slot housing 136 is provided with a limiting slot 1361, and when the sliding member 137 slides upwards, the limiting slot 1361 plays a limiting role.

The slider 137 is further connected with a reset member, and when the user releases the flip member 141, the reset member makes the slider 137 slide down along the sliding slot housing 136, keeping the locking pin 134 snapped into the catching slot 1381 and the locking slot 135. The reset member may be a reset spring.

In the modified example, the slider 137, the slide groove case 136, and the lock pin 134 are integrally connected to the first housing 131, and the pawl plate 138, the lock groove 135, and the second housing 132 are integrally connected. The two parts are locked by the matching of the locking pin 134, the locking groove 135 and the clamping groove 1381, when the locking pin 134 is disengaged from the locking groove 135 and the clamping groove 1381, the locking is realized, the second back part 18 can rotate relative to the seat part 12, and the angle adjustment or the complete folding of the second back part 18 can be realized.

Further, as shown in fig. 12, the seat portion 12 includes a seat plate 121 and an extension rod 122, the seat plate 121 is provided with an insertion groove 1211, and the corresponding extension rod 122 is provided with an insertion block (not shown) which is inserted into the insertion groove 1211 to achieve connection between the extension rod 122 and the seat plate 121.

Optionally, the extension rod 122 can be angularly adjusted relative to the seat plate 121; when the baby sits, the extension rod 122 turns downwards, so that the lower leg of the baby can naturally bend downwards; when the baby lies, the extension rod 122 is turned upwards and maintains the same plane as the seat plate 121 for supporting the legs and feet of the baby.

Further, as shown in fig. 13 to 14, the upper rotary joint 19 includes a first rotary member 191, a second rotary member 192, and a cam 193, the first rotary member 191 being connected to the first back 11, the second rotary member 192 being connected to the second back 18, the first rotary member 191 being rotatably connected to the second rotary member 192;

when the upper rotating joint 19 is locked, the cam 193 is located between the first rotating member 191 and the second rotating member 192 in the axial direction;

the switch unit 14 can bring the cam 193 out of engagement with the first rotating member 191 or the second rotating member 192 in the axial direction, and unlock the upper rotating joint 19.

Specifically, as shown in fig. 13, the cam 193 includes a fourth wire hole 1931, and the fourth wire hole 1931 is connected to the first wire 143 a. The second rotating member 192 is provided with a cam slot 1921, the cam 193 is at least partially inserted into the cam slot 1921, the second rotating member 192 further comprises a sliding shaft 1922, and the cam 193 is sleeved on the sliding shaft 1922 and can move along the axis of the sliding shaft 1922. The first rotating member 191 is rotatably connected to the sliding shaft 1922, and the cam 193 can be at least partially inserted into the first rotating member 191.

In the locked state, a part of the cam 193 is fitted into the cam groove 1921 of the second rotating member 192, and the other part is fitted into the first rotating member 191, thereby locking the first rotating member 191 and the second rotating member 192. At this time, the first back 11 and the second back 18 are locked.

When the inverter 141 is flipped, the first wire 143a pulls the cam 193 so that the cam 193 is completely inserted into the cam groove 1921 and is disengaged from the first rotator 191. The first rotating member 191 is rotatable with respect to the second rotating member 192, and the first back portion 11 is rotatable with respect to the second back portion 18.

A reset member may be mounted between cam 193 and cam slot 1921 to compress the reset member when cam 193 is pulled toward cam slot 1921. When the first wire 143a does not apply a force to the cam 193, the cam 193 moves away from the second rotating member 192 again by the action of the reset member, and is partially inserted into the first rotating member 191, so as to lock the first rotating member 191 and the second rotating member 192.

As shown in fig. 3, a ceiling unit 17 is further attached to the seat portion 11, and the ceiling unit 17 includes a ceiling rod 171, a ceiling rotor 172, and a ceiling cloth 173.

Further, as shown in fig. 13 to 14, a ceiling rotating member 172 is further installed on the outer side of the first rotating member 191, and the ceiling rod rotating member 172 is rotatably connected to the first rotating member 191 and is fixedly connected to the ceiling rod 171.

The two ceiling bars 171 are used to support the ceiling cloth 173, and one side of the ceiling cloth 173 is fixed to the first back 11. The ceiling rotation member 172 is used to adjust an angle between the ceiling rod 171 and the first back 11, thereby facilitating the unfolding or folding of the ceiling cloth. When the ceiling rotor 172 rotates, the ceiling rod 171 is driven to be folded upward.

Further, as shown in fig. 8, a handle hole 1212 is formed at the rear side of the seat plate 121, and when the seat frame assembly 10 is completely folded, a hand of a user penetrates through the handle hole 1212, so as to lift the entire stroller or the entire seat frame assembly 10, thereby facilitating transportation.

By implementing the embodiment, the folding of the first back 11 relative to the second back 18 and the angle adjustment and folding of the second back 18 relative to the seat 12 can be realized, so that the flexibility of adjustment is increased, and different requirements of users can be met.

A baby stroller frame:

fig. 15-30 are schematic structural views of a stroller frame according to a first embodiment.

As shown in fig. 15, the stroller frame 20 includes an upper push rod 21, a lower push rod 22, a front bracket 23, a rear bracket 24, a first rotating joint 25, a second rotating joint 26, and an unlocking trigger mechanism 27, wherein the unlocking trigger mechanism 27 is mounted on the upper push rod 21, a lower end of the upper push rod 21 is connected to an upper end of the lower push rod 22 through the first rotating joint 25, a lower end of the lower push rod 22 is connected to the front bracket 23 and an upper end of the rear bracket 24 through the second rotating joint 26, the unlocking trigger mechanism 27 is configured to trigger the first rotating joint 25 to unlock, and the lower push rod 22 is rotated to trigger the second rotating joint 26 to unlock.

In the embodiment, the unlocking trigger mechanism 27 is operated to unlock the first rotating joint 25, the upper push rod 21 is turned backwards and downwards to unlock the second rotating joint 26, then the lower push rod 21 is turned forwards and downwards, and finally the rear support 24 and the front support 23 are folded.

Unlocking the trigger mechanism:

as shown in fig. 16-17, the unlocking trigger mechanism 27 includes a button 271, and the unlocking trigger mechanism 27 is configured to unlock itself after pressing the button 271, and drive the first rotating joint 25 to unlock through rotation.

Specifically, the unlocking trigger mechanism 27 is installed at the top center of the upper push rod 21, and the button 271 faces downward, so that when the user holds the unlocking trigger mechanism 27 with four fingers, the button 271 can be pressed.

Further, the unlocking triggering mechanism 27 further includes an upper semicircular shell 272, a telescopic member 273, a spring (not shown) and a lower semicircular shell 274, the upper semicircular shell 272 and the lower semicircular shell 274 are spliced to form a cylindrical tube, a part of the key 271 extends out of the lower semicircular shell 272, the key 271 is installed between the lower semicircular shell 274 and the spring, the telescopic member 273 is connected with the upper semicircular shell 272, and two ends of the telescopic member 273 are respectively connected with at least one upper steel wire (not shown);

after the button 271 is pressed, the unlocking and unlocking trigger mechanism 27 is unlocked, the button 271, the upper semicircular shell 272 and the lower semicircular shell 274 compress the telescopic piece 273 after rotating, and the telescopic piece 273 pulls the upper steel wire to drive the first rotating joint 25 to unlock.

Specifically, as shown in fig. 17, the key 271 is a long strip, and the protrusion 2713 of the key 271 is a long strip oval, and is exposed outside the unlocking trigger mechanism 27, and there is enough area for four fingers to act on the protrusion 2713 at the same time.

A portion of the key 271 fits inside the small semicircular shell 274, and a rib 2713 projects downward from a key hole 2741 of the lower semicircular shell 274. The two ends of the key 271 extend outwards to form a locking block 2711, the inner sides of the two ends of the lower semicircular shell 274 extend out to form lower insertion pieces 2743 respectively, a guide groove 2742 is formed in the lower insertion pieces 2743, and the locking block 2711 is inserted into the guide groove 2742. When the push button 271 is pressed, it will not be pulled out from the guide groove 2742, and the push button 271 and the lower half-round housing 274 will rotate together.

As shown in fig. 16, a groove is formed on the upper surface of the protruding strip 2713 of the key 271, two spring mounting posts 2712 are mounted in the groove, and a spring (not shown) is sleeved on the spring mounting posts 2712.

As shown in fig. 17, two circular spring grooves 2761 are opened on the surface of the spring mounting block 276 facing the push button 271, the top end of the spring is inserted into the spring grooves 2761, and the spring mounting block 276 abuts against the inner tube 211 of the push rod 21. When the button 271 is pressed, the button 271 pushes the spring upward; when the key 271 is released, the key 271 is returned by the spring, and the protrusion 2713 protrudes downward from the key hole 2741.

Further, as shown in fig. 16, the upper push rod 21 includes an inner tube 211 and two outer tubes 212, and the cylindrical tube is sleeved outside the inner tube 211;

the unlocking trigger mechanism 27 further comprises two sleeves 275, the sleeves 275 are respectively fixedly connected with the two outer tubes 212, two ends of each cylindrical tube are respectively inserted into the two sleeves 275 and can rotate, locking grooves 2751 are formed in the sleeves 275, locking blocks 2711 extend out of two ends of each key 271, the locking blocks 2711 are inserted into the locking grooves 2751, when the keys 271 are pressed, the locking blocks 2711 are separated from the locking grooves 2751, and the cylindrical tubes can rotate relative to the sleeves 275.

The lower tab 2743 of the lower half-round housing 274 is inserted into the sleeve 275, and the body of the lower half-round housing 274 interfaces with the edge of the sleeve 275.

Upper tabs 2722 extend outwardly from opposite ends of the upper housing 275, the upper tabs 2722 also being received in the sleeve 275, the body of the upper housing 275 abutting the edges of the sleeve 275.

When the push button 271 is pressed, the locking piece 2711 is firstly released from the locking groove 2751, the unlocking trigger mechanism 27 is unlocked, and then the locking piece 2711 enters the guide groove 2742. The button 271, upper housing 272 and lower housing 274 are able to rotate relative to the sleeve 275 and the push-up rod 21, while the telescoping member 273 is not rotating.

For user convenience, the upper and lower

semi-circular shells

272 and 274 may be rotated toward the front of the stroller to form a cylindrical tube.

Further, as shown in fig. 16-17, the telescopic member 273 includes a first connecting member 2731, a second connecting member 2732, a first telescopic rod 2733 and a second telescopic rod 2734, the first connecting member 2731 is connected to one end of the first telescopic rod 2733, the second connecting member 2732 is connected to one end of the second telescopic rod 2734, the other end of the first telescopic rod 2733 is connected to the other end of the second telescopic rod 2734, the first connecting member 2731 and the second connecting member 2732 are respectively connected to an upper steel wire, and the first connecting member 2731 and the second connecting member 2732 are both provided with a slope boss 2735;

two slope grooves 2721 are formed in the upper semicircular shell 272, the slope bosses 2735 are embedded into the slope grooves 2721, and when the upper semicircular shell 272 rotates, the slope grooves 2721 push the two slope bosses 2735 to drive the first telescopic rod 2733 and the second telescopic rod 2734 to mutually approach and retract.

Wherein the first telescopic bar 2733 is inserted into the second telescopic bar 2734, and a spring is installed in the second telescopic bar 2734.

Ramp boss 2735 is generally triangular in shape and includes two sloped surfaces. The ramp slot 2721 also has two ramps, one of which has a length greater than the other.

When the upper half-shell 272 is rotated in the forward direction, the longer slope pushes against the ramp boss 2735, causing the two ramp bosses 2735 to approach each other, driving the first telescopic bar 2733 and the second telescopic bar 2734 to retract toward each other.

When the user releases the unlocking triggering mechanism 27, the first telescopic rod 2733 and the second telescopic rod 2734 are away from each other and extend out, the slope boss 2735 pushes the upper semicircular shell 272 to rotate reversely, and the upper semicircular shell 272 drives the lower semicircular shell 274 and the key 271 to rotate reversely to return.

The first connecting member 2731 and the second connecting member 2732 are both provided with steel wire holes for connecting one end of an upper steel wire (not shown).

When the first telescopic bar 2733 and the second telescopic bar 2734 are retracted close to each other, one end of the upper wire is pulled, and the upper wire drives the first rotary joint 25 to unlock.

When the unlocking trigger mechanism 27 needs to be operated, one hand of a user holds the upper semicircular shell 272 and the lower semicircular shell 274 to be spliced into a cylindrical pipe, firstly presses the key 271, and then rotates the upper semicircular shell 272 and the lower semicircular shell 274 to be spliced into the cylindrical pipe. The unlocking by one-hand operation is realized, and the unlocking can be completed at one time. The operation can be completed without simultaneous operation of two hands, complex operation gestures or two-time operation.

A first rotary joint:

as shown in fig. 18 to 22, the first rotary joint 25 includes an upper push rod rotary housing 251, a lower push rod rotary housing 252, and an upper locking piece 253;

the upper push rod rotation housing 251 is connected to the lower end of the upper push rod 21, the lower push rod rotation housing 251 is connected to the upper end of the lower push rod 22, the upper locking member 253 is connected to the first connecting member 2731 and the second connecting member 2732 of the unlocking trigger mechanism 27 through the upper wire, and the upper wire pulls the upper locking member 253 to unlock the first rotary joint 25.

Further, as shown in fig. 18 to 22, the first rotary joint 25 further includes a gear 254, a first gear groove 2511 is formed in the upper push rod rotary housing 251, a second gear groove 2521 is formed in the lower push rod rotary housing 252,

when the first rotary joint 25 is locked, the gear 254 is fitted into the first gear groove 2511 and the second gear groove 2521;

when the upper locking member 253 moves upward, the gear 254 is disengaged from the first gear groove 2511 or the second gear groove 2521, and the first rotary joint 25 is unlocked.

Specifically, the upper push rod rotation housing 251, the lower push rod rotation housing 252, and the gear 254 are coaxially connected.

The gear 254 includes a plurality of teeth, an upper locking groove 2541 is formed at an edge of the gear 254, the upper locking piece 2531 of the upper locking piece 253 extends downward and is inserted into the upper locking groove 2541, the upper locking piece 253 locks the gear 254, the gear 254 cannot rotate, the upper push rod rotating housing 251 and the lower push rod rotating housing 252 cannot rotate relative to each other, at this time, the first rotating joint 25 is locked, and the upper push rod 21 and the lower push rod 22 cannot rotate and fold.

When the upper lock piece 253 is pulled upward by the upper wire, the upper lock piece 2531 is disengaged from the upper lock groove 2541. At this time, the restoring member 258 pushes the gear 254 to move toward the first gear groove 2511 in the axial direction, and is completely inserted into the first gear groove 2511 and removed from the second gear groove 2521, the lower push rod rotation housing 252 and the upper push rod rotation housing 251 are rotatably connected only by a rotation shaft (not shown), and the lower push rod rotation housing 252 can rotate relative to the upper push rod rotation housing 251, so that the upper push rod 21 relatively rotates relative to the lower push rod 22.

Further, as shown in fig. 20 to 21, the upper locking member 253 is installed in a connection pipe 2513 of the upper push rod rotation housing 251, an entry groove 2512 communicating with the connection pipe 2513 is further opened in the first gear groove 2511, the entry groove 2512 axially corresponds to the upper locking groove 2541, and the upper locking piece 2531 of the upper locking member 253 is inserted into the entry groove 2512 when locking.

Further, as shown in fig. 18 to 19, the first rotary joint 25 further includes an upper cover plate 255, and the upper cover plate 255 covers the outer side surface of the lower push rod rotary housing 252 to shield the end of the rotary shaft.

Further, as shown in fig. 21 to 22, the first rotary joint 25 further includes a spring mount 256, a push spring 257 and a restoring member 258, the push spring 257 is mounted on the spring mount 256, the spring mount 256 includes a plug arm 2561 extending toward the gear 254, a slot 2543 is provided on the gear 254, and the plug arm 2561 is inserted into the slot 2543.

The restoring member 258 comprises a lower wire hook 2581 and a second slope 2582, wherein the lower wire hook 2581 is connected with one end of the lower wire and used for driving the lower wire. Two second ramps 2582 are located on a side of the restoring member 258 facing the gear 254, and a corresponding first ramp 2542 is provided on the gear 254, and the first ramp 2542 contacts with the second ramp 2582.

When the upper locking member 253 is released upward, the biasing spring 257 is expanded to axially push the restoring member 258 toward the gear 254, and the second ramp 2582 pushes the first ramp 2542 to axially move, so that the gear 254 moves toward the first gear groove 2511 and is released from the second gear groove 2521, thereby unlocking the first rotary joint 25.

After unlocking, the upper push rod 21 drives the upper push rod rotating shell 251, the gear 254, the spring mounting seat 256, the pushing spring 257 and the resetting piece 258 to rotate backwards and downwards, and the resetting piece 258 pulls the lower steel wire when rotating, so that the second rotating joint 26 is unlocked.

The unlocking trigger mechanism 27 drives the first rotating joint 25 to unlock through the upper steel wire, and the first rotating joint 25 drives the second rotating joint 26 to unlock through the lower steel wire. The two-section unlocking mode enables the second rotating joint 26 to be unlocked only after the first rotating joint 25 is unlocked and the upper push rod 21 is rotated and folded. The first rotary joint 25 and the second rotary joint 26 are not unlocked simultaneously, and the user must first rotate the upper push rod 21 to unlock the second rotary joint 26 and rotate the lower push rod 22. The folding sequence is unique, and the user can conveniently and sequentially operate according to the set folding sequence. If the first rotary joint 25 and the second rotary joint 26 are unlocked at the same time, it may not be known to the user whether the upper push rod 21 or the lower push rod 22 should be folded first.

A second revolute joint:

as shown in fig. 23 to 29, the second revolute joint 26 includes a lower wire 261 and a lower locking member 262, and when the upper push rod 21 is rotated, the lower wire 261 pulls the lower locking member 262 to unlock the second revolute joint 26.

Further, the second rotating joint 26 further includes a lower push rod rotating member 263, a front bracket rotating member 264 and a rear bracket rotating member 265;

the lower push rod rotating part 263 is connected with the lower end of the lower push rod 22, and the lower push rod rotating part 263 is rotatably connected with the front bracket rotating part 264 through a first rotating shaft 266;

the front supporter rotating member 264 is connected to the upper end of the front supporter 23, and the front supporter rotating member 264 and the rear supporter rotating member 265 are rotatably connected by a second rotating shaft 267;

the rear bracket rotating piece 265 is connected with the upper end of the rear bracket 24;

the lower push rod rotation element 263, the front support rotation element 264 and the rear support rotation element 265 are all provided with a lower locking groove 268, the lower locking element 262 is inserted into the lower locking groove 268, and the second rotation joint 26 is locked.

Specifically, the lower push rod rotating member 263 includes two fan-shaped pieces, the front bracket rotating member 264 includes a circular piece, and the two lower push rod rotating members 263 hold the front bracket rotating member 264 therebetween and are rotatably connected by the first rotating shaft 266, so as to realize the relative rotation between the lower push rod 22 and the front bracket 23.

As shown in fig. 28 to 29, the rear supporter rotating member 265 is wrench-shaped, inserted into the front supporter rotating member 264, and rotatably coupled by the second rotating shaft 267 to realize the relative rotation of the front supporter 23 and the rear supporter 24.

As shown in fig. 24 to 26, the second rotary joint 26 further includes a rear fork 2651, and the rear fork 2651 holds the installed lower push rod rotating member 263, the front bracket rotating member 264, and the rear bracket rotating member 265 therein, and is rotatably connected by a second rotating shaft 267.

As shown in fig. 24 to 25, the second rotary joint 26 further includes a front fork 2641, and the front fork 2641 holds therein the lower push rod rotating member 263, the front bracket rotating member 264, the rear bracket rotating member 265, and the rear fork 2651 after mounting, and is rotatably connected to the first rotary shaft 266 and the second rotary shaft 267. The outer side of front fork 2641 is covered with a lower cover plate 269 which provides an aesthetic appearance by shielding the internal mounting structure.

In addition to the front fork 2641, the lower lever rotating member 263, the front bracket rotating member 264, the rear bracket rotating member 265, and the rear fork 2651 are provided with lower locking grooves 268. The lower locking groove 268 of the lower lever rotator 263 is a long groove, the lower locking member 262 can slide up and down in the long groove, and the upper end of the lower locking member 262 is connected to the lower end of the lower wire 261. When the lower wire 261 pulls the lower locking member 262, the lower locking member 262 slides upward along the elongated slot, and is disengaged from the lower locking grooves 268 of the front bracket rotating member 264, the rear bracket rotating member 265, and the rear fork 2651, thereby unlocking the second rotating joint 26.

As shown in fig. 27, a return spring 2611 is sleeved on the lower wire 261, and when the lower wire 261 is pulled upward, the return spring 2611 is compressed. When the tension of the lower wire 261 is released, the return spring 2611 pushes the lower locking member 262 downward, and the lower locking member 262 is reinserted into the lower locking groove 268.

The lower rotary joint 26 in this embodiment can not only realize folding of the stroller, but also provide sufficient support for the front support 23, the rear support 24 and the lower push rod 22, thereby increasing the stability of the stroller in the unfolded state.

Further, as shown in fig. 31, the stroller frame 20 further includes a first connecting rod 28, one end of the first connecting rod 28 is rotatably connected to the lower push rod 22, and the other end thereof is connected to the backrest rotating joint 13 of the seat frame assembly 10.

Further, as shown in fig. 32, the stroller frame 20 further includes a second connecting rod 29a and a third connecting rod 29b, one end of the second connecting rod 29b is rotatably connected to the other end of the first connecting rod 28, the other end of the second connecting rod 29a is rotatably connected to one end of the third connecting rod 29b, and the other end of the third connecting rod 29b is fixedly connected to the grab bar 27.

The first, second and third connecting

rods

28, 29a, 29b act as a supporting connection for the seat frame assembly 10. As shown in fig. 17, the seat frame assembly 10 can be maintained in a stable state when the stroller is unfolded. As shown in fig. 18, the seat frame assembly 10 can be stowed in the stroller frame 20 when the stroller is collapsed.

In this embodiment, the seat frame assembly 10 can be folded independently relative to the stroller frame 20, and can be flexibly adjusted to meet different use requirements.

Alternatively, the seat frame assembly 10 may also be folded together with the stroller frame 20.

As shown in a variation of the second embodiment in fig. 34-35, the seat frame assembly 10 can further include a first connecting rod 28, a first connecting post 123, and a second connecting post 1322; one end of the first connecting rod 28 is rotatably connected with the lower push rod 22, and the other end is connected with the backrest rotating joint 13 of the seat frame assembly 10; the front bracket 23 is connected to the seat frame assembly 10 via a first connecting post 123; the rear bracket 24 is connected 1322 to the seat frame assembly 10 by a second connecting post.

When the stroller frame 20 is unfolded, the first connecting post 123, the second connecting post 1322 and the connecting rod 25 serve as a three-point positioning for the seat frame assembly 10, and the relative positions of the seat frame assembly 10 and other components of the stroller frame 20 are maintained.

When the stroller frame 20 is folded, the respective connection points of the first connection post 123, the second connection post 1322 and the first connection rod 28 are rotated, and the seat frame assembly 10 is rotated with respect to the push-up rod 21, the push-down rod 22, the front bracket 22 and the rear bracket 23.

The folding process of the baby stroller frame is as follows:

when the baby stroller frame 20 is folded, the push button 271 is firstly pressed, and then the cylindrical tube formed by the upper semicircular shell 272 and the lower semicircular shell 274 is rotated forwards, so that the first rotary joint 25 is unlocked;

after unlocking, the upper push rod 21 is turned backwards and downwards, the upper push rod 21 is folded to the rear side of the lower push rod 22, and the second rotary joint 26 is unlocked after the upper push rod 21 is folded;

then the lower push rod 22 is turned forwards and downwards, and the lower push rod 22 and the upper push rod 21 are turned downwards together to be close to the front bracket 23;

finally, the baby stroller frame 20 is lifted, the rear support 24 and the front support 23 naturally close under the action of gravity, the folding of the whole baby stroller frame 20 is completed, and the folded state is shown in fig. 30.

Through implementing this embodiment, can make things convenient for the quick folding of baby's shallow frame to volume after folding is littleer. Because the push rod is divided into two sections by the upper push rod 21 and the lower push rod 22, the volume after folding can be reduced, and the storage is convenient. In addition, the unlocking of the second rotary joint 26 is realized by folding the upper push rod 21, so that the step-by-step operation during folding is facilitated, and the folding device is simple and easy to understand.

Example two:

as shown in fig. 36, the folding method of the baby stroller comprises the following steps:

s201: an operation switch unit 14 that unlocks the upper rotary joint 19 and the lower rotary joint 13;

s202: the first back part 11 is turned forwards and downwards, so that the first back part 11 approaches to the second back part 18;

s203: turning the second back 18 forward and downward so that the second back 18 approaches the seat portion 12;

s204: operating the unlocking trigger mechanism 27 to unlock the first rotary joint 25;

s205: the upper push rod 21 is turned backwards and downwards to be close to the lower push rod 22;

s206: the second rotating joint 26 is unlocked, and the lower push rod 22 is turned forwards and downwards to be close to the front support 23;

s207: the front bracket 23 and the rear bracket 24 are naturally collapsed by gravity when lifting the handle hole 1212 (see fig. 32) of the seat frame assembly 10.

Further, when the unlock trigger mechanism 27 is operated in step S204,

firstly pressing the key 271 of the unlocking trigger mechanism 27;

the unlocking trigger 27 is then rotated forward.

Through implementing this embodiment, folding the seat frame subassembly earlier, then folding baby's shallow frame, seat frame subassembly 10 folds the receipts car with baby's shallow frame 20 is independent, has increased the flexibility of adjusting, satisfies user's different demands.

The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.

Claims

1. A stroller comprising a seat frame assembly (10) and a stroller frame (20), characterized in that the seat frame assembly (10) comprises a first back (11), a second back (18), a seat (12), a switch unit (14), a connection upper swivel joint (19) between the first back (11) and the second back (18), and a connection lower swivel joint (13) between the second back (18) and the seat (12), the switch unit (14) is mounted on a cross beam (16) between the first back (11) and the second back (18), the cross beam (16) is connected with the upper swivel joint (19), and the switch unit (14) is capable of unlocking the upper swivel joint (19) and the lower swivel joint (13).

2. The stroller of claim 1,

when the folding chair is folded, after the switch unit (14) is operated, the switch unit (14) drives the upper rotating joint (19) and the lower rotating joint (13) to be unlocked, so that the first back part (11) can be folded in a rotating mode relative to the second back part (18), and the second back part (18) can be folded in a rotating mode relative to the seat part (12);

when the seat is unfolded, the first back part (11) is rotated, after the first back part (11) is rotated and unfolded to a proper position relative to the second back part (18), the upper rotating joint (19) locks the first back part (11), and after the second back part (18) is rotated and unfolded to a proper position relative to the seat part (12), the lower rotating joint (13) locks the second back part (18).

3. The stroller of claim 1, wherein the switch unit (14) comprises a flip (141), a return spring (142) and a wire (143), the flip (141) is rotatably connected to the cross member (16), the return spring (142) is installed between the flip (141) and the cross member (16), one end of the wire (143) is connected to the flip (141), and the other end is connected to the upper rotary joint (19) and the lower rotary joint (13);

when the turnover piece (141) is rotated, the turnover piece (141) pulls the steel wire (143), and the steel wire (143) drives the upper rotating joint (19) and the lower rotating joint (13) to be unlocked.

4. The stroller of claim 1, wherein the lower pivot joint (13) comprises a first housing (131), a second housing (132), a pivot shaft (133), a locking pin (134) and a locking slot (135);

the first housing (131) is connected to the second back portion (18), the second housing (132) is connected to the seat portion (12), the rotating shaft (133) connects the first housing (131) and the second housing (132), the first housing (131) is rotatable about the rotating shaft (133), the locking pin (134) is connected to the switch unit (14) and is installed between the first housing (131) and the second housing (132), and the locking groove (135) is formed on the second housing (132);

when locked, the locking pin (134) is inserted into the locking groove (135);

when the lock is unlocked, the switch unit (14) drives the locking pin (134) to be disengaged from the locking groove (135).

5. Stroller according to claim 4, characterized in that the lower revolute joint (13) further comprises a sliding slot housing (136), a sliding member (137) and a claw plate (138), the sliding groove shell (136) is connected between the second back part (18) and the second shell (132), the sliding groove shell (136) is connected with the switch unit (14), one end of the locking pin (134) is fixed on the sliding piece (137), the other end of the locking pin passes through the limit groove (1361) of the sliding groove shell (136) and can slide along the sliding groove shell (136), the jaw plate (138) is mounted on the second housing (132), a plurality of catching slots (1381) on the jaw plate (138) correspond to the locking slots (135), the other end of the locking pin (134) passes through the sliding groove shell (136) and then is inserted into the clamping groove (138) and the locking groove (135).

6. The stroller of claim 1, wherein the upper pivot joint (19) comprises a first pivot member (191), a second pivot member (192) and a cam (193), the first pivot member (191) being coupled to the first back portion (11), the second pivot member (192) being coupled to the second back portion (18), the first pivot member (191) being rotatably coupled to the second pivot member (192);

when the upper rotating joint (19) is locked, the cam (193) is located between the first rotating member (191) and the second rotating member (192) in the axial direction;

the switch unit (14) can drive the cam (193) to be separated from the first rotating piece (191) or the second rotating piece (192) along the axial direction, and the upper rotating joint (19) is unlocked.

7. Stroller according to claim 1, characterized in that the stroller frame (20) comprises an upper push bar (21), a lower push bar (22), a front bracket (23), a rear bracket (24), a first swivel joint (25), a second swivel joint (26) and an unlocking trigger mechanism (27), the unlocking trigger mechanism (27) is arranged on the upper push rod (21), the lower end of the upper push rod (21) is connected with the upper end of the lower push rod (22) through the first rotating joint (25), the lower end of the lower push rod (22) is connected with the upper ends of the front bracket (23) and the rear bracket (24) through the second rotary joint (26), the unlocking trigger mechanism (27) is used for triggering the first rotating joint (25) to unlock, and the second rotating joint (26) is triggered to unlock after the lower push rod (22) is rotated.

8. The stroller of claim 7, wherein the unlocking trigger mechanism (27) comprises a button (271), and the unlocking trigger mechanism (27) is configured to unlock itself after pressing the button (271) and rotate to unlock the first rotary joint (25);

the unlocking trigger mechanism (27) further comprises an upper semicircular shell (272), a telescopic piece (273), a spring and a lower semicircular shell (274), wherein the upper semicircular shell (272) and the lower semicircular shell (273) are spliced to form a cylindrical pipe, a part of the key (271) extends out of the lower semicircular shell (273), the key (271) is installed between the lower semicircular shell (273) and the spring, the telescopic piece (273) is connected with the upper semicircular shell (272), and two ends of the telescopic piece (273) are respectively connected with an upper steel wire;

after the key (271) is pressed, the unlocking trigger mechanism (27) is unlocked, the key (271), the upper semicircular shell (272) and the lower semicircular shell (274) compress the telescopic piece (273) after rotating, and the telescopic piece (273) pulls the upper steel wire to drive the first rotating joint (25) to unlock.

9. The stroller of claim 8, wherein the push-up rod (21) comprises an inner tube (211) and an outer tube (212), the cylindrical tube fitting over the inner tube (211);

the unlocking trigger mechanism (27) further comprises a sleeve (275), the sleeve (275) is fixedly connected with the outer pipe (212), two ends of the cylindrical pipe are respectively inserted into the sleeve (275) and can rotate, a locking groove (2751) is formed in the sleeve (275), two ends of the key (271) extend out of locking blocks (2711), the locking blocks (2711) are inserted into the locking groove (2751), when the key (271) is pressed, the locking blocks (2711) are separated from the locking groove (2751), and the cylindrical pipe can rotate relative to the sleeve (275).

10. The stroller of claim 8, wherein the telescopic member (273) comprises a first connecting member (2731), a second connecting member (2732), a first telescopic rod (2733) and a second telescopic rod (2734), the first connecting member (2731) is connected to one end of the first telescopic rod (2733), the second connecting member (2732) is connected to one end of the second telescopic rod (2734), the other end of the first telescopic rod (2733) is connected to the other end of the second telescopic rod (2734), the first connecting member (2731) and the second connecting member (2732) are connected to one of the upper steel wires, and each of the first connecting member (2731) and the second connecting member (2732) is provided with a ramp boss (2735);

two slope grooves (2721) are seted up in last semicircle shell (272), slope boss (2735) are embedded in slope groove (2721), when last semicircle shell (272) rotate, slope groove (2721) promote two slope boss (2735) drive first telescopic link (2733) with second telescopic link (2734) are close to each other and retract.

11. The stroller of claim 7, wherein the first pivot joint (25) comprises an upper push rod pivot housing (251), a lower push rod pivot housing (252), and an upper locking member (253);

the upper push rod rotating shell (251) is connected with the lower end of the upper push rod (21), the lower push rod rotating shell (252) is connected with the upper end of the lower push rod (22), the upper locking piece (253) is connected with the unlocking trigger mechanism (27) through an upper steel wire, and the first rotating joint (25) is unlocked when the upper steel wire pulls the upper locking piece (253);

the first rotating joint (25) also comprises a gear (254), a first gear groove (2511) is arranged in the upper push rod rotating shell (251), a second gear groove (2521) is arranged in the lower push rod rotating shell (252),

the gear (254) is fitted into the first gear groove (2511) and the second gear groove (2521) when the first rotary joint (25) is locked;

when the upper locking member (253) moves upward, the gear (254) is disengaged from the first gear groove (2511) or the second gear groove (2521), and the first rotary joint (25) is unlocked.

12. The stroller of claim 7, wherein the second pivot joint (26) comprises a lower wire (261) and a lower locking member (262), and when the upper push rod (21) is pivoted, the lower wire (261) pulls the lower locking member (262) to unlock the second pivot joint (26);

the second rotating joint (26) comprises a lower push rod rotating piece (263), a front support rotating piece (264) and a rear support rotating piece (265);

the lower push rod rotating piece (263) is connected with the lower end of the lower push rod (22), and the lower push rod rotating piece (263) is rotatably connected with the front bracket rotating piece (264) through a first rotating shaft (266);

the front bracket rotating piece (264) is connected with the upper end of the front bracket (23), and the front bracket rotating piece (264) is rotatably connected with the rear bracket rotating piece (265) through a second rotating shaft (267);

the rear bracket rotating piece (265) is connected with the upper end of the rear bracket (24);

lower locking grooves (268) are formed in the lower push rod rotating part (263), the front support rotating part (264) and the rear support rotating part (265), the lower locking part (262) is inserted into the lower locking grooves (268), and the second rotating joint (26) is locked.

13. A method of collapsing a stroller for a stroller according to any of claims 1 to 12, comprising the steps of:

-operating the switch unit (14) to unlock the upper revolute joint (19) and the lower revolute joint (13);

-turning the first back (11) forwards and downwards so that the first back (11) approaches the second back (18);

turning the second back part (18) forwards and downwards to enable the second back part (18) to approach the seat part (12);

-operating the unlocking trigger mechanism (27) to unlock the first rotary joint (25);

the upper push rod (21) is turned backwards and downwards to be close to the lower push rod (22);

the second rotary joint (26) is unlocked, and the lower push rod (21) is turned forwards and downwards to be close to the front bracket (23);

lifting a lifting handle hole (1212) on the seat frame assembly (10), and folding the front bracket (23) and the rear bracket (24).