CN211442449U

CN211442449U - Baby carriage

Info

Publication number: CN211442449U
Application number: CN201921580507.3U
Authority: CN
Inventors: 胡杰
Original assignee: Dongguan Jinwang Children's Products Co ltd
Current assignee: Mamas and Papas Holdings Ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-09-08
Anticipated expiration: 2029-09-20

Abstract

The utility model discloses a baby stroller, which comprises a seat frame component and a baby stroller frame, wherein the seat frame component comprises a backrest part, a seat part and a backrest rotating joint, and the backrest rotating joint is connected with the backrest part and the seat part; the baby stroller frame comprises an upper push rod, a lower push rod, a front support, a rear support, a first rotating joint and a second rotating joint, the lower end of the upper push rod is connected with the upper end of the lower push rod through the first rotating joint, and the lower end of the lower push rod is connected with the front support and the upper end of the rear support through the second rotating joint. The utility model discloses convenient operation is folded the car to folding back volume is littleer, can independently fold the seat frame subassembly of closing and adjusting.

Description

Baby carriage

Technical Field

The utility model relates to a baby's shallow technical field especially relates to a baby's shallow.

Background

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

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 with a seat frame assembly that is easy to operate, compact after folding, and capable of being folded and adjusted independently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a convenient operation and receives the car to folding back volume is littleer, can independently fold the baby's shallow of receiving the seat frame subassembly of receiving and adjusting.

The utility model provides a baby stroller, which comprises a seat frame component and a baby stroller frame, wherein the seat frame component comprises a backrest part, a seat part and a backrest rotating joint, and the backrest rotating joint is connected with the backrest part and the seat part;

the baby stroller frame comprises an upper push rod, a lower push rod, a front support, a rear support, a first rotating joint and a second rotating joint, the lower end of the upper push rod is connected with the upper end of the lower push rod through the first rotating joint, and the lower end of the lower push rod is connected with the front support and the upper end of the rear support through the second rotating joint.

Furthermore, the unlocking trigger mechanism is arranged on the upper push rod and used for triggering the first rotating joint to unlock and triggering the second rotating joint to unlock after the lower push rod is rotated;

the unlocking trigger mechanism comprises a key, and is used for unlocking after the key is pressed and driving 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 a 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 an upper steel wire;

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.

Further, the seat frame assembly further comprises a switch unit mounted on the backrest part;

when the folding seat is folded, after the switch unit is operated, the switch unit drives the backrest rotating joint to unlock, so that the backrest part can be rotationally folded relative to the seat part;

when the backrest part is unfolded, the backrest part is rotated, and after the backrest part is rotated and unfolded to a proper position relative to the seat part, the backrest rotating joint locks the backrest part;

the backrest part comprises a hollow U-shaped rod, two ends of the U-shaped rod are connected with the two backrest rotating joints, and the switch unit is installed at the top of the U-shaped rod;

the switch unit comprises a turnover piece, an installation piece and a steel wire, wherein the installation piece is buckled at the top of the U-shaped rod, the turnover piece is rotatably connected with the installation piece, one end of the steel wire is connected with the turnover piece, and the other end of the steel wire is connected with the backrest rotating joint;

when the turnover piece is rotated, the turnover piece pulls the steel wire, and the steel wire drives the backrest rotating joint to be unlocked.

Further, the backrest rotation joint comprises a first shell, a second shell, a rotation shaft, a locking pin and a locking groove;

the first case is connected with the backrest part, the second case is connected with the seat part, the rotating shaft is connected with the first case and the second case, the first case can rotate around the rotating shaft, the locking pin is connected with the switch unit and is installed between the first case and the second case, and the locking groove is formed on the second case;

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 backrest rotating joint further comprises a sliding groove shell, a sliding piece and a jaw plate, the sliding groove shell is connected with the backrest part and between the second shells, the sliding piece is connected with the switch unit and can slide along the sliding groove shell, the jaw plate is installed on the second shells, a plurality of clamping grooves in the jaw plate correspond to the locking grooves, one end of the locking pin is installed on the sliding piece, and the other end of the locking pin is inserted into the clamping grooves and the locking grooves.

Further, the seat frame assembly further comprises a grab rail and a grab rail rotating joint;

the grab rail rotating joint comprises a pushing piece, a linkage piece, a locking piece and a connecting piece, the pushing piece is arranged in the first shell and rotates along with the first shell, the locking piece is embedded into the connecting piece and locks the connecting piece, and the connecting piece is fixedly connected with the grab rail;

when the pushing piece rotates towards the linkage piece, the linkage piece is pushed to move along a straight line, the linkage piece drives the locking piece to be separated from the connecting piece, and the grab bar and the connecting piece can be folded in a rotating mode; the pushing piece comprises an arc-shaped strip and a pushing block, the arc-shaped strip takes the rotation center of the first shell as the center of a circle, and the pushing block is positioned at one end of the arc-shaped strip;

the linkage piece comprises a contact part and an inclined groove, the pushing block is in contact with the contact part and pushes the linkage piece to move, at least one part of the locking piece is clamped into the inclined groove, and when the linkage piece moves, the inclined groove pushes the locking piece to be separated from the connecting piece.

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

the utility model discloses an unblock first revolute joint, the upper push rod is overturned downwards backward and is realized the unblock of second revolute joint, then will push down the bull stick and overturn downwards forward, draw in the after-poppet and fore-stock in at last, the utility model discloses convenient operation receipts car to can be with folding volume littleer, convenient storage;

and the seat frame assembly can be independently folded or unfolded relative to the baby stroller frame, so that the adjustment is convenient, and the baby 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 baby stroller frame according to a first embodiment of the present invention in an unfolded state;

fig. 2 is a top-down perspective exploded view of an unlocking trigger mechanism of a stroller frame according to a first embodiment of the present invention;

fig. 3 is a bottom perspective exploded view of an unlocking triggering mechanism of a stroller frame according to an embodiment of the present invention;

fig. 4 is an exploded view of the first rotary joint of the stroller frame in the first embodiment of the present invention;

fig. 5 is an exploded view of the first rotary joint of the stroller frame in the first embodiment of the present invention;

fig. 6 is a partially enlarged view of a first rotating joint of a stroller frame according to a first embodiment of the present invention;

FIG. 7 is a left perspective exploded view of FIG. 6;

FIG. 8 is a right perspective exploded view of FIG. 6;

fig. 9 is a perspective view of a second rotating joint of the stroller frame according to the first embodiment of the present invention;

fig. 10 is an exploded view of the second rotary joint of the stroller frame in the first embodiment of the present invention;

fig. 11 is an exploded view of the second rotary joint of the stroller frame in the first embodiment of the present invention;

fig. 12 is a partially enlarged view of a second rotating joint of the stroller frame according to the first embodiment of the present invention;

FIG. 13 is an enlarged partial view of the rear fork of FIG. 12 with the rear fork omitted;

FIG. 14 is a partial enlarged view of FIG. 13 with the lower push rod rotating member and lower locking member omitted;

FIG. 15 is an enlarged partial view of the front carrier rotating member of FIG. 14 with the front carrier rotating member omitted;

fig. 16 is a perspective view of a stroller frame according to a first embodiment of the present invention in a folded state;

FIG. 17 is a perspective view of a seat frame assembly in an expanded state according to one embodiment of the present invention;

FIG. 18 is a perspective view of a seat frame assembly at a switch unit in accordance with a first embodiment of the present invention;

FIG. 19 is a side view of the seat frame assembly at the switch unit in accordance with one embodiment of the present invention;

FIG. 20 is an enlarged partial view of the back portion of the seat frame assembly in accordance with one embodiment of the present invention;

FIG. 21 is an enlarged view of a portion of a seat frame assembly at a pivot joint of a backrest according to a first embodiment of the present invention;

FIG. 22 is an exploded view of a side of a seat frame assembly at the pivot joint of the backrest in accordance with one embodiment of the present invention;

FIG. 23 is an exploded view of the other side of the seat frame assembly at the seat back pivot joint according to one embodiment of the present invention;

FIG. 24 is an enlarged view of a portion of a armrest rotary joint of a seat frame assembly according to an embodiment of the present invention;

FIG. 25 is another enlarged partial view of the armrest rotary joint of the seat frame assembly according to the first embodiment of the present invention;

FIG. 26 is an enlarged partial view of the seat portion of the seat frame assembly in accordance with one embodiment of the present invention;

FIG. 27 is another perspective view of a seat frame assembly in accordance with one embodiment of the present invention;

FIG. 28 is a side view of the seat frame assembly in a folded condition according to one embodiment of the present invention;

FIG. 29 is a perspective view of the seat frame assembly in a folded condition according to one embodiment of the present invention;

FIG. 30 is a perspective view of a stroller in accordance with a first embodiment of the present invention;

FIG. 31 is an enlarged view of a portion of the front frame of the stroller in accordance with the first embodiment of the present invention;

FIG. 32 is an enlarged view of a portion of the rear support of the stroller in accordance with an embodiment of the present invention;

FIG. 33 is a perspective view of a stroller in accordance with a second embodiment of the present invention in an expanded state;

fig. 34 is a perspective view of the stroller according to the second embodiment of the present invention in a folded state;

fig. 35 is a partially enlarged view of the stroller according to the second embodiment of the present invention.

Reference symbol comparison table:

the seat frame assembly 10:

the backrest part 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;

the backrest rotation 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 second steel wire hole 1371, a pin hole 1372, a limiting block 1373 and a clamping groove 1381;

the switching unit 14: the turnover part 141, the mounting part 142, the steel wire 143, the first steel wire hole 1411, and the first through hole 1421;

a grab rail 15;

grab rail rotation joint 16: the pushing member 161, the linkage member 162, the locking member 163, the connecting member 164, the arc-shaped bar 1611, the pushing block 1612, the contact part 1621 and the inclined groove 1622;

ceiling unit 17: a ceiling rod 171, a ceiling pivot joint 172;

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 key 271, the upper semicircular shell 272, the telescopic piece 273, the lower semicircular shell 274, the sleeve 275, the spring mounting block 276, the locking block 2711, the spring mounting post 2712, the convex strip 2713, the slope slot 2721, the upper insert piece 2722, the first connecting piece 2731, the second connecting piece 2732, the first telescopic rod 2733, the second telescopic rod 2734, the slope boss 2735, the key hole 2741, the guide slot 2742, the lower insert piece 2743, the locking slot 2751 and the spring slot 2761;

the seat frame assembly 10: the backrest rotating joint 13, the grab bar 15, the first connecting post 123, the handle hole 1212 and the second connecting post 1322.

Detailed Description

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

It is easily understood that, according to the technical solution of the present invention, a plurality of structural modes and implementation modes that can be mutually replaced by those of ordinary skill in the art can be achieved without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as limiting or restricting the technical solutions of the present invention in its entirety or as a limitation 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 first embodiment is as follows:

fig. 1 to 16 are schematic structural views of a stroller frame according to a first embodiment.

As shown in fig. 1, 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 used for triggering the first rotating joint 25 to unlock, and the lower push rod 22 is rotated to trigger the second rotating joint 26 to unlock.

This embodiment is through the first revolute joint 25 of operation unblock trigger mechanism 27 unblock, and the unblock of second revolute joint 26 is realized to the downward upset of push-up rod 21 backward, then overturns push-down rod 21 forward downwards, draws in after-poppet 24 and fore-stock 23 in last, the utility model discloses convenient operation receipts car to the volume of baby's shallow frame after folding can be littleer.

Unlocking the trigger mechanism:

as shown in fig. 2-3, 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 into a cylindrical tube, a part of the key 271 extends out of the lower semicircular shell 274, 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. 3, 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, so that a sufficient area is provided for four fingers to simultaneously act on the protrusion 2713.

A portion of the key 271 fits inside the lower 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. 2, 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. 3, 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. 2, 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. 2-3, 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 finished 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. 4 to 8, 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. 4-8, 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. 6 to 7, the upper locking member 253 is installed in the 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. 4 to 5, 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. 7 to 8, 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. 9 to 15, 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. 14-15, 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. 10 to 12, 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. 10 to 11, 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. 13, 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.

The folding process is as follows:

as shown in fig. 1, when the stroller frame 20 is folded, the push button 271 is first pressed, and then the cylindrical tube formed by the upper semicircular shell 272 and the lower semicircular shell 274 is rotated forward, so as to unlock the first rotary joint 25;

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. 16.

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.

Fig. 17-29 are schematic structural views of a seat frame assembly according to a first embodiment of the present invention.

A seat frame assembly 10 for a stroller, including a backrest portion 11, a seat portion 12, a switch unit 14, and a backrest rotation joint 13 connecting the backrest portion and the seat portion, the switch unit 14 being mounted on the backrest portion 11;

when the folding chair is folded, after the switch unit 14 is operated, the switch unit 14 drives the backrest rotating joint 13 to unlock, so that the backrest 11 can rotate relative to the seat 12 to be folded;

when the seat back is unfolded, the seat back 11 is rotated, and after the seat back 11 is rotated and unfolded to a proper position with respect to the seat part 12, the seat back rotation joint 13 locks the seat back 11.

Fig. 17 shows the seat frame assembly 10 in the unfolded state, when it is desired to fold, the switch unit 14 is operated, and the switch unit 14 drives the backrest rotation joint 13 to unlock;

then, the backrest part 11 is rotated in a direction approaching the seat part 12 until the backrest part 11 is rotated to a horizontal position almost equal to the seat part 12.

When it is desired to unfold the seat frame assembly 10 again, the backrest portion 11 is rotated away from the seat portion 12 until the appropriate deployment angle is achieved, the backrest rotation joint 13 is locked again and the backrest portion 11 cannot rotate relative to the seat portion 12.

In this embodiment, after the backrest rotation joint 13 is unlocked, the backrest 11 is rotated and folded relative to the seat 12, so as to realize the operation of independently folding and folding the seat frame assembly 10, and the stroller frame can be independently folded or unfolded relative to the stroller frame, so that the stroller frame is convenient to adjust, and is suitable for different use states and requirements.

Further, the backrest part 11 includes a hollow U-shaped bar, both ends of the U-shaped bar are connected with two backrest rotation joints 13, and a switch unit 14 is installed on the top of the U-shaped bar.

Specifically, the backrest part 11 is a complete U-shaped rod, the U-shaped rod is arranged in an inverted manner when the backrest is unfolded, two end heads of the U-shaped rod are respectively connected with the backrest rotating joint 13, and the switch unit 14 is arranged at the top end of the middle part of the U-shaped rod, namely the highest part of the U-shaped rod when the U-shaped rod is unfolded.

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.

The deployment angle of the backrest part 11 is not limited to the angle shown in fig. 2, and the backrest part 11 may be further turned back away from the seat part 12 until it is completely laid flat, so that the infant can lie down easily.

Alternatively, the backrest portion 11 may have other structures, such as: the U-shaped bar is replaced by a back board.

Further, as shown in fig. 18 to 19, the switch unit 14 includes a turning member 141, a mounting member 142 and a steel wire 143, the mounting member 142 is fastened to the top of the U-shaped bar, the turning member 141 is rotatably connected to the mounting member 142, one end of the steel wire 143 is connected to the turning member 141, and the other end is connected to the backrest rotating joint 13;

when the turning member 141 is rotated, the turning member 141 pulls the wire 142, and the wire 142 drives the backrest rotation joint 13 to unlock.

As shown in fig. 18, the tilting member 141 is provided with first wire holes 1411 toward the front side of the seat frame assembly 10, one ends of two wires 143 are fixed in the two first wire holes 1411, respectively, and then the wire 142 passes through the mounting member 142 and enters the U-shaped bar, passes through the end of the U-shaped bar, and is connected to the backrest rotation joint 13.

In operation, a user pulls the turnover member 141 backward from the back of the seat frame assembly 10, the upper end of the turnover member 141 is hinged to the mounting member 142, the lower portion of the turnover member 141 is turned backward (right side of fig. 4), one end of the steel wire 143 is pulled backward, the other end of the steel wire 143 pulls the backrest rotation joint 13, and the backrest rotation joint 13 is unlocked.

Further, as shown in fig. 18 and 20, the mounting member 142 is provided with a first through hole 1421, the U-shaped rod is provided with a second through hole 111, and the steel wire 142 is connected to the backrest rotation joint 13 after sequentially penetrating through the first through hole 1421, the second through hole 111, and the U-shaped rod.

Further, as shown in fig. 17 and fig. 18 to 20, the back rotation joint 13 includes a first housing 131, a second housing 132, a rotation shaft 133, a locking pin 134 and a locking groove 135;

the first case 131 is connected with the backrest part 11, the second case 132 is connected with the seat part 12, the first case 131 and the second case 132 are connected by the rotation shaft 133, the first case 131 can rotate around the rotation shaft 133, the locking pin 134 is connected with the switch unit 14 and installed between the first case 131 and the second case 132, and the locking groove 135 is formed on the second case 132;

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. 17, 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 two backrest rotation joints 13 are respectively positioned at the left and right sides of the backrest part 11 and the seat part 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 backrest part 11, and the switch unit 14 are integrally rotated 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.

As shown in fig. 23, the locking grooves 135 include four, equally radially distributed around the center of the second housing 132. The plurality of locking grooves 135 facilitate the adjustment of the included angle between the backrest portion 11 and the seat portion 12, and the locking pin 134 can be snapped into any one of the locking grooves 135, so as to meet different requirements of users. The user can adjust the backrest 11 to lie flat, half-lying, sitting.

Further, as shown in fig. 21 to 23, the backrest rotation joint 13 further includes a slide groove housing 136, a sliding member 137, and a jaw plate 138, the slide groove housing 136 is connected between the backrest part 11 and the second housing 132, the sliding member 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 sliding member 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 wire hole 1371, and the other end of the wire 143 is fixedly connected to the second wire hole 1371. When the wire 143 is pulled, the slider 137 is slid upward.

Sliding member 137 further includes a pin hole 1372, and locking pin 134 is inserted into pin hole 1372 and fixedly connected, and when sliding member 137 slides upward, locking pin 134 is driven to slide upward, and locking pin 134 is released from locking groove 135, so as to unlock backrest rotation joint 13.

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. 23, 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 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 released from the locking groove 135 and the clamping groove 1381, the locking is realized, the backrest part 11 can rotate relative to the seat part 12, and the angle adjustment or the complete folding of the backrest part 11 can be realized.

Further, as shown in fig. 17 and 14-25, the seat frame assembly 10 further includes a grab bar 15 and a grab bar pivot joint 16;

the grab bar rotary joint 16 comprises a pushing piece 161, a linkage piece 162, a locking piece 163 and a connecting piece 164, wherein the pushing piece 161 is installed in the first shell 131 and rotates with the first shell 131, the locking piece 163 is embedded into the connecting piece 164 and locks the connecting piece 164, and the connecting piece 164 is fixedly connected with the grab bar 15;

when the pushing member 161 rotates towards the link 162, the link 162 is pushed to move along a straight line, the link 162 drives the locking member 163 to be disengaged from the connecting member 164, and the grab bar 15 and the connecting member 164 can be folded in a rotating manner.

Specifically, a part of the link 162 is installed between the first housing 131 and the second housing 132, and a part of the link is installed inside the seat plate 121 and shielded by the shielding plate 124.

The backrest rotating joint 13 can control the grab rail rotating joint 16 through the linkage 162, and when the backrest rotating joint 13 is unlocked and the backrest 11 rotates towards the seat part 12, the grab rail rotating joint 16 is driven to be unlocked, and the grab rail 15 is turned downwards and folded.

As shown in fig. 21, the second housing 132 is provided with a guide slot 1321, and the link 162 moves linearly along the guide slot 1321.

As shown in fig. 24, the locking member 163 has a gear structure with four straight teeth, one of the teeth of the locking member 163 is inserted into the link member 162, and the link member 162 moves linearly, thereby driving the locking member 163 to be disengaged from the connecting member 164.

The remaining three teeth of the locking member 163 are fitted into the fitting grooves (not shown) of the coupling member 164, and when the three straight teeth are fitted, the locking member 163 locks the grab bar 15, and the grab bar 15 cannot be rotated. When the link 162 releases the lock piece 163 from the insertion groove, the grab bar 15 can be folded by rotation.

Since the locking member 163 has four straight teeth and is uniformly spaced, the corresponding fitting groove also has four teeth grooves. The armrest rod 15 can be rotated to adjust an angle with the seat portion 12.

As shown in fig. 21, the outer side of the seat plate 121 is opened with a mounting groove 125 corresponding to the shape of the locking member 163, wherein the lowermost tooth groove of the mounting groove 125 is opened, and a straight tooth of the locking member 163 can penetrate and act with the link 162. When the locking member 163 is released from the connecting member 164, the locking member 163 is inserted into the mounting groove 125.

Further, as shown in fig. 25, the pushing member 161 includes an arc-shaped bar 1611 and a pushing block 1612, the arc-shaped bar 1611 is centered on the rotation center of the first housing 131, and the pushing block 1612 is located at one end of the arc-shaped bar 1611.

As shown in fig. 25, the link 162 includes a contact portion 1621 and a slanted groove 1622, the pushing block 1612 contacts the contact portion 1621 and pushes the link 162 to move, one straight tooth of the locking member 163 is caught in the slanted groove 1622, and the slanted groove 1622 pushes the locking member 163 to be released from the connecting member 164 when the link 162 moves.

Specifically, when the first housing 131 is rotated clockwise in the arrow direction in fig. 9, the pushing block 1612 pushes the contact part 1621 to move rightward,

when the link 162 moves leftward in the orientation of fig. 25, the inclined groove 1622 moves the locking member 163 outward in the axial direction thereof, and is released from the insertion groove of the connecting member 164.

A reset member (not shown) is further disposed at the link 162, and when the first housing 131 is unfolded and rotates reversely, the pushing block 1612 is separated from the contact portion 1621, the link 162 is reset by the reset member, moves to the right side of fig. 10, and the inclined groove 1622 pushes the locking member 163 to return to the insertion groove, and is locked with the connecting member 164 again. The reset member may be a reset spring.

Further, as shown in fig. 26, 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. 27, a ceiling unit 17 is attached to the seat portion 11, and the ceiling unit 17 includes two ceiling rods 171 and a ceiling pivot joint 172. The ceiling rods 171 are used for supporting the ceiling cloth, and the ceiling rotating joints 172 are used for adjusting the included angle between the two ceiling rods 171, so that the ceiling cloth can be unfolded or folded conveniently. The ceiling pivot joint 172 is attached to both side rods of the U-shaped bar of the backrest part 11 and pivots together with the backrest part 11. In this embodiment, when the seat frame assembly 10 needs to be folded, as shown in fig. 12, the flip member 141 of the switch unit 14 is pulled backwards, and the switch unit 14 drives the backrest rotation joint 13 to unlock;

then, the backrest part 11 is pushed to turn downwards, in the process of pushing the backrest part 11, the armrest rotating joint 16 is unlocked, and the armrest rod 15 is pushed to turn downwards together. Until the grab bar 15 and the backrest part 11 are completely folded.

As shown in fig. 28-29, the ceiling poles 171 may be folded upside down.

As shown in fig. 27 and 29, 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 user's hand can pass through the handle hole 1212 to lift the entire stroller or the entire seat frame assembly 10, thereby facilitating transportation.

By implementing this embodiment, the angle adjustment and the complete folding of the backrest portion 11 with respect to the seat portion 12 can be achieved, and the angle adjustment and the complete folding of the grab bar 15 with respect to the seat portion 12 can also be achieved. The flexibility of adjustment is increased, and different requirements of users can be met.

Fig. 30-32 are schematic views of the stroller according to the first embodiment.

The stroller includes a stroller frame 20, the stroller frame 20 includes a push rod 21, a front support 22, a rear support 23, and wheels 24, 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. 31 to 32, the front frame 22 is connected to the seat portion 12, the rear frame 23 is connected to the back pivot joint 13, and the back pivot joint 13 is connected to the push rod 21 via the connecting rod 25.

Specifically, as shown in fig. 31, the seat portion 12 is provided with a first connecting column 123, and the front bracket 22 is rotatably connected to the seat plate 121 through the first connecting column 123;

as shown in fig. 32, a second connecting column 1322 is provided on the second housing 132 of the backrest rotation joint 13, and the rear bracket 23 is rotatably connected to the backrest rotation joint 13 through the second connecting column 1322.

The second housing 132 of the backrest rotation joint 13 is also rotatably connected to the push rod 21 via the connecting rod 25.

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 coupling points of the first coupling post 123, the second coupling post 1322 and the coupling rod 25 are rotated, and the seat frame assembly 10 is rotated with respect to the push rod 21, the front bracket 22 and the rear bracket 23.

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.

Example two:

fig. 33-35 are schematic views showing the structure of the stroller in the second embodiment.

The stroller includes a seat frame assembly 10 and further includes a stroller frame 20, the seat frame assembly 10 being mounted to the stroller frame 20.

The seat frame assembly 10 includes a grab bar 15 and a backrest swivel joint 13.

Further, as shown in fig. 17, 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. 35, 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 15 of the seat frame assembly 10.

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. 33, the seat frame assembly 10 can be maintained in a stable state when the stroller is unfolded. As shown in fig. 34, the seat frame assembly 10 can be stowed in the stroller frame 20 when the stroller is folded.

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.

Through implementing this embodiment, can realize the convenient folding fast of baby's shallow. And the seat frame assembly 10 and the stroller frame 20 are independently folded and folded, so that the adjustment flexibility is increased, and different requirements of users can be met.

What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.

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 backrest portion (11), a seat portion (12) and a backrest rotation joint (13), the backrest rotation joint (13) connecting the backrest portion (11) and the seat portion (12);

the baby stroller frame (20) comprises an upper push rod (21), a lower push rod (22), a front support (23), a rear support (24), a first rotating joint (25) and a second rotating joint (26), 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), and the lower end of the lower push rod (22) is connected with the front support (23) and the upper end of the rear support (24) through the second rotating joint (26).

2. The stroller of claim 1, wherein the stroller frame (20) further comprises an unlocking trigger mechanism (27), the unlocking trigger mechanism (27) is mounted on the upper push rod (21), the unlocking trigger mechanism (27) is used for triggering the first rotating joint (25) to unlock, and the lower push rod (22) is rotated to trigger the second rotating joint (26) to unlock; the unlocking trigger mechanism (27) comprises a key (271), and the unlocking trigger mechanism (27) is used for unlocking after the key (271) is pressed and driving the first rotating joint (25) to unlock through rotation; the unlocking trigger mechanism (27) further comprises an upper semicircular shell (272), a telescopic piece (273), a spring and a lower semicircular shell (274), the upper semicircular shell (272) and the lower semicircular shell (274) are spliced to form a cylindrical pipe, a part of the key (271) extends out of the lower semicircular shell (274), the key (271) is installed between the lower semicircular shell (274) 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.

3. The stroller of claim 2, 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).

4. The stroller of claim 2, 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.

5. The stroller of claim 2, 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) further 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.

6. The stroller of claim 1, 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 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 support rotating part (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.

7. The stroller of any of claims 1-6, wherein the seat frame assembly (10) further comprises a switch unit (14), the switch unit (14) being mounted on the backrest portion (11);

when the folding seat is folded, after the switch unit (14) is operated, the switch unit (14) drives the backrest rotating joint (13) to unlock, so that the backrest (11) can be rotatably folded relative to the seat part (12);

when the folding seat is unfolded, the backrest part (11) is rotated, and after the backrest part (11) is rotated and unfolded in place relative to the seat part (12), the backrest rotating joint (13) locks the backrest part (11); the backrest part (11) comprises a hollow U-shaped rod, two ends of the U-shaped rod are connected with the two backrest rotating joints (13), and the switch unit (14) is installed at the top of the U-shaped rod;

the switch unit (14) comprises a turnover piece (141), a mounting piece (142) and a steel wire (143), the mounting piece (142) is buckled at the top of the U-shaped rod, the turnover piece (141) is rotatably connected with the mounting piece (142), one end of the steel wire (143) is connected with the turnover piece (141), and the other end of the steel wire (143) is connected with the backrest rotating 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 backrest rotating joint (13) to be unlocked.

8. The stroller of claim 7, wherein the backrest swivel joint comprises a first housing (131), a second housing (132), a pivot shaft (133), a locking pin (134) and a locking slot (135);

the first case (131) is connected to the backrest portion (11), the second case (132) is connected to the seat portion (12), the rotation shaft (133) connects the first case (131) and the second case (132), the first case (131) is rotatable about the rotation shaft, the locking pin (134) is connected to the switch unit (14) and installed between the first case (131) and the second case (132), and the locking groove (135) is formed on the second case (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).

9. The stroller of claim 8, wherein the backrest rotation joint (13) further comprises a sliding groove shell (136), a sliding member (137) and a claw plate (138), the sliding groove shell (136) is connected between the backrest part (11) and the second housing (132), the sliding member (137) is connected with the switch unit (14) and can slide along the sliding groove shell (136), the claw plate (138) is mounted on the second housing (132), a plurality of catching grooves (1381) on the claw plate (138) correspond to the locking grooves (135), one end of the locking pin (134) is mounted on the sliding member (137), and the other end is inserted into the catching grooves (1381) and the locking grooves (135).

10. The stroller of claim 8, wherein the seat frame assembly (10) further comprises a grab bar (15) and a grab bar pivot joint (16);

the grab rail rotating joint (16) comprises a pushing piece (161), a linkage piece (162), a locking piece (163) and a connecting piece (164), the pushing piece (161) is installed in the first shell (131) and rotates with the first shell (131), the locking piece (163) is embedded into the connecting piece (164) and locks the connecting piece (164), and the connecting piece (164) is fixedly connected with the grab rail (15);

when the pushing piece (161) rotates towards the linkage piece (162), the linkage piece (162) is pushed to move along a straight line, the linkage piece (162) drives the locking piece (163) to be separated from the connecting piece (164), and the grab bar (15) and the connecting piece (164) can be folded in a rotating mode; the pushing member (161) comprises an arc-shaped strip (1611) and a pushing block (1612), the arc-shaped strip (1611) takes the rotation center of the first shell (131) as the center of a circle, and the pushing block (1612) is positioned at one end of the arc-shaped strip (1611);

the linkage piece (162) comprises a contact portion (1621) and a chute (1622), the pushing block (1612) is in contact with the contact portion (1621) and pushes the linkage piece (162) to move, at least one part of the locking piece (163) is clamped into the chute (1622), and when the linkage piece (162) moves, the chute (1622) pushes the locking piece (163) to be pulled out of the connecting piece (164).