CN110667681B

CN110667681B - Baby stroller and baby stroller folding method

Info

Publication number: CN110667681B
Application number: CN201910893491.XA
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: 2023-06-06
Anticipated expiration: 2039-09-20
Also published as: CN114572290A; CN110667681A

Abstract

The invention discloses a baby stroller, which comprises a seat frame assembly and a baby stroller frame, wherein the seat frame assembly can be independently folded relative to the baby stroller frame; the baby stroller frame comprises an upper push rod, a lower push rod, a front support, a rear support, a first rotating joint, a second rotating joint and an unlocking trigger mechanism, wherein the unlocking trigger mechanism is arranged on the upper push rod, the lower end of the upper push rod is connected with the upper end of the lower push rod through the first rotating joint, the lower end of the lower push rod is connected with the front support through the second rotating joint, and the unlocking trigger mechanism is used for triggering unlocking of the first rotating joint and triggering unlocking of the second rotating joint after rotating the lower push rod. The invention also discloses a folding method of the baby stroller. The folding seat frame assembly is convenient to operate and fold, has smaller volume after folding, and can be independently folded, folded and adjusted.

Description

Baby stroller and baby stroller folding method

Technical Field

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

Background

The existing baby stroller frame has complex vehicle collecting mode, is not easy to operate by a user, and has larger folded volume.

In addition, no seat frame assembly capable of being independently folded and folded is arranged on the existing baby stroller frame. When the baby stroller is folded, the seat frames are folded together, the seat frames cannot be adjusted independently, and the flexibility is poor.

Therefore, there is a need for a stroller and stroller folding method that facilitates easy operation of the stroller and that is compact after folding and that allows independent folding and adjustment of the seat frame assembly.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a baby stroller and a baby stroller folding method, wherein the baby stroller is convenient to operate and fold, has smaller volume after being folded, and can be independently folded, folded and adjusted.

The invention provides a stroller, comprising a seat frame assembly and a stroller frame, wherein the seat frame assembly can be independently folded relative to the stroller frame;

the baby stroller frame comprises an upper push rod, a lower push rod, a front support, a rear support, a first rotating joint, a second rotating joint and an unlocking trigger mechanism, wherein the unlocking trigger mechanism is arranged on the upper push rod, the lower end of the upper push rod is connected with the upper end of the lower push rod through the first rotating joint, the lower end of the lower push rod is connected with the front support through the second rotating joint, and the unlocking trigger mechanism is used for triggering unlocking of the first rotating joint and triggering unlocking of the second rotating joint after rotating the lower push rod.

Further, the unlocking trigger mechanism comprises a key, and the unlocking trigger mechanism is used for unlocking the unlocking trigger mechanism after pressing the key and driving the first rotating joint to unlock through rotation; the unlocking triggering mechanism further comprises an upper semicircular shell, a telescopic piece, a spring and a lower semicircular shell, wherein the upper semicircular shell and the lower semicircular shell are spliced into a cylindrical tube, a part of the key extends out of the lower semicircular shell, the key is arranged 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 rotate and then compress the telescopic piece, and the telescopic piece pulls the upper steel wire to drive the first rotating joint to unlock.

Further, the upper push rod comprises an inner pipe and an outer pipe, and the cylindrical pipe is sleeved outside the inner pipe;

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

Further, the telescopic members comprise a first connecting member, a second connecting member, a first telescopic rod and a second telescopic rod, wherein the first connecting member is connected with one end of the first telescopic rod, the second connecting member 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 member and the second connecting member are respectively connected with an upper steel wire, and slope bosses are arranged on the first connecting member and the second connecting member;

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 retract in a mutually approaching mode.

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

The gear is embedded into the first gear groove and the second gear groove when the first rotating 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.

Further, 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 piece is connected with the lower end of the lower push rod, and the lower push rod rotating piece is rotatably connected with the front support rotating piece 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 bracket rotating piece is connected with the upper end of the rear bracket;

the lower push rod rotating piece, the front support rotating piece and the rear support rotating piece are 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 includes a back portion, a seat portion, a switch unit, and a back rotational joint connecting the back portion and the seat portion, the switch unit being mounted on the back portion;

when the backrest is folded, the switch unit is operated to drive the backrest rotating joint to unlock, so that the backrest part can be rotated and folded relative to the seat part;

when the backrest is unfolded, the backrest is rotated, and after the backrest is unfolded in place relative to the seat, the backrest is locked by the backrest rotating joint.

Further, a first through hole is formed in the mounting piece, a second through hole is formed in the U-shaped rod, and the steel wire sequentially penetrates through the first through hole, the second through hole and the U-shaped rod and then is connected with the backrest rotating joint;

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

the first housing is connected with the backrest part, the second housing is connected with the seat part, the rotating shaft is connected with the first housing and the second housing, the first housing can rotate around the rotating shaft, the locking pin is connected with the switch unit and is arranged 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 unlocking, the switch unit drives the locking pin to be separated from the locking groove.

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

Further, the seat frame assembly further includes a grab bar and a grab bar revolute joint;

the grab handle rotating joint comprises a pushing piece, a linkage piece, a locking piece and a connecting piece, wherein 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 handle;

the pushing piece pushes the linkage piece to move along a straight line when rotating towards the linkage piece, the linkage piece drives the locking piece to be separated from the connecting piece, and the grab rail and the connecting piece can rotate and fold.

Further, the pushing piece comprises an arc-shaped strip and a pushing block, wherein the arc-shaped strip takes the rotation center of the first shell as the circle center, and the pushing block is positioned at one end of the arc-shaped strip;

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

The invention also provides a baby stroller folding method for the baby stroller, which comprises the following steps of:

operating the switch unit to unlock the backrest rotation joint;

turning the backrest part forward and downward to make the backrest part approach to the seat part;

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

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

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

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

After the technical scheme is adopted, the method has the following beneficial effects:

According to the invention, the unlocking trigger mechanism is operated to unlock the first rotating joint, the upper push rod is turned backwards and downwards to unlock the second rotating joint, then the lower push rod is turned forwards and downwards, and finally the rear bracket and the front bracket are folded;

and the seat frame assembly can be independently folded and unfolded, can be independently folded or unfolded relative to the baby stroller frame, is convenient to adjust, and is suitable for different use states and requirements.

Drawings

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

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

FIG. 2 is a top view 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 view of an exploded view of an unlock trigger mechanism of a stroller frame according to an embodiment of the present invention;

FIG. 4 is a left perspective exploded view of a first rotary joint of a stroller frame according to an embodiment of the present invention;

FIG. 5 is a right-view exploded view of a first rotary joint of a stroller frame according to an embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of a first pivot joint of a stroller frame according to an embodiment of the present invention;

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

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

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

FIG. 10 is a left perspective exploded view of a second revolute joint of a stroller frame according to a first embodiment of the present invention;

FIG. 11 is a right view exploded view of a second revolute joint of a stroller frame according to a first embodiment of the present invention;

FIG. 12 is an enlarged view of a portion of a second revolute joint of a stroller frame according to a first embodiment of the present invention;

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

FIG. 14 is an enlarged view of a portion of FIG. 13 with the lower push rod rotator and lower lock omitted;

fig. 15 is a partial enlarged view of fig. 14 with the front bracket rotational member omitted;

FIG. 16 is a perspective view showing a folded state of a stroller frame according to an embodiment of the present invention;

FIG. 17 is a perspective view of a seat frame assembly in an expanded state in accordance with a first embodiment of the present invention;

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

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

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

FIG. 21 is an enlarged view of a portion of a seat frame assembly at a back pivot joint in accordance with an embodiment of the present invention;

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

FIG. 23 is an exploded view of another side of the seat frame assembly at the back pivot joint of the first embodiment of the present invention;

FIG. 24 is an enlarged view of a portion of a seat frame assembly at a grab bar pivot joint in accordance with an embodiment of the present invention;

FIG. 25 is another enlarged fragmentary view of the seat frame assembly at the grab bar pivot joint of the first embodiment of the present invention;

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

FIG. 27 is another perspective view of a seat frame assembly according to a first embodiment of the invention;

FIG. 28 is a side view of a seat frame assembly in a folded condition in accordance with the first embodiment of the present invention;

FIG. 29 is a perspective view of a seat frame assembly in a folded condition in accordance with a first embodiment of the present invention;

FIG. 30 is a perspective view of a stroller according to an embodiment of the present invention;

FIG. 31 is an enlarged view of a portion of a stroller at a front frame according to an embodiment of the present invention;

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

FIG. 33 is a perspective view showing a deployed state of a stroller according to a second embodiment of the present invention;

FIG. 34 is a perspective view showing a collapsed condition of the stroller according to the second embodiment of the present invention;

FIG. 35 is an enlarged view of a portion of a stroller in accordance with a second embodiment of the present invention;

fig. 36 is a flowchart of a stroller folding method according to a third embodiment of the present invention.

Reference numeral control table:

seat frame assembly 10:

backrest 11: a second through hole 111;

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

backrest rotation joint 13: the first housing 131, the second housing 132, the rotation shaft 133, the locking pin 134, the locking groove 135, the sliding groove housing 136, the sliding piece 137, the claw plate 138, the cross bar 139, the guide groove 1321, the second connecting post 1322, the limit groove 1361, the second wire hole 1371, the pin hole 1372, the limit block 1373, and the clip groove 1381;

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

A grab rail 15;

grab bar revolute joint 16: the pushing member 161, the linkage member 162, the locking member 163, the connecting member 164, the arcuate bar 1611, the pushing block 1612, the contact portion 1621, the chute 1622;

ceiling unit 17: a ceiling lever 171 and a ceiling rotary joint 172;

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

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

first rotary joint 25: upper push rod rotation housing 251, lower push rod rotation housing 252, upper locking member 253, gear 254, upper cover plate 255, spring mount 256, push spring 257, reset member 258, first gear slot 2511, entry slot 2512, second gear slot 2521, upper locking block 2531, upper locking slot 2541, first ramp 2542, slot 2543, insert arm 2561, lower wire hook 2581, second ramp 2582;

second revolute joint 26: lower wire 261, lower lock 262, lower push rod rotator 263, front bracket rotator 264, rear bracket rotator 265, first shaft 266, second shaft 267, lower lock groove 268, lower cover plate 269, return spring 2611, front fork 2641, rear fork 2651;

Unlocking trigger mechanism 27: the key 271, the upper half shell 272, the telescoping member 273, the lower half shell 274, the sleeve 275, the spring mounting block 276, the locking block 2711, the spring mounting post 2712, the raised bar 2713, the ramp slot 2721, the upper insert tab 2722, the first connector 2731, the second connector 2732, the first telescoping rod 2733, the second telescoping rod 2734, the ramp boss 2735, the key hole 2741, the guide slot 2742, the lower insert tab 2743, the locking slot 2751, the spring slot 2761;

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

Detailed Description

Specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

It is to be readily understood that, according to the technical solutions of the present invention, those skilled in the art may replace various structural modes and implementation modes with each other without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.

Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms.

Embodiment one:

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 support 23, a rear support 24, a first rotating joint 25, a second rotating joint 26, and an unlocking trigger mechanism 27, wherein the unlocking trigger mechanism 27 is installed 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 support 23 and the rear support 24 through the second rotating joint 26, and the unlocking trigger mechanism 27 is used for triggering the first rotating joint 25 to unlock, and triggering the second rotating joint 26 to unlock after rotating the lower push rod 22.

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

Unlocking the trigger mechanism:

as shown in fig. 2-3, the unlocking trigger mechanism 27 includes a key 271, and the unlocking trigger mechanism 27 is configured to unlock itself after pressing the key 271, and drive the first rotating joint 25 to unlock by rotating.

Specifically, the unlocking trigger mechanism 27 is mounted at the top center of the upper push rod 21, and the key 271 faces downward, so that the key 271 can be pressed when four fingers of a user hold the unlocking trigger mechanism 27.

Further, the unlocking trigger mechanism 27 further comprises an upper semicircular shell 272, a telescopic part 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 arranged between the lower semicircular shell 274 and the spring, the telescopic part 273 is connected with the upper semicircular shell 272, and two ends of the telescopic part 273 are respectively connected with at least one upper steel wire (not shown);

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 are rotated to compress the telescopic member 273, and the telescopic member 273 pulls the upper steel wire to drive the first rotary joint 25 to unlock.

Specifically, as shown in fig. 3, the key 271 has a long shape, and the ridge 2713 of the key 271 has a long oval shape, is exposed to the outside of the unlocking trigger mechanism 27, and has a sufficient area to allow four fingers to act on the ridge 2713 at the same time.

A portion of the key 271 is mounted inside the lower half-shell 274, and the protrusion 2713 protrudes downward from the key hole 2741 of the lower half-shell 274. The two ends of the key 271 extend outwards to form locking blocks 2711, the inner sides of the two ends of the lower semicircular shell 274 extend out to form lower inserting sheets 2743 respectively, the lower inserting sheets 2743 are provided with guide grooves 2742, and the locking blocks 2711 are inserted into the guide grooves 2742. When the key 271 is pressed, the key 271 is not separated from the guide groove 2742, and the key 271 and the lower half-circular case 274 are rotated together.

As shown in fig. 2, a groove is formed on the upper surface of the protruding bar 2713 of the key 271, and two spring mounting posts 2712 are mounted in the groove, and the spring mounting posts 2712 are used for sleeving a spring (not shown).

As shown in fig. 3, two circular spring grooves 2761 are formed in the surface of the spring mounting block 276 facing the key 271, the top ends of the springs are 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 key 271 is pressed, the key 271 pushes up the spring; when the key 271 is released, the key 271 returns under the action of 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 triggering mechanism 27 further comprises two sleeves 275, the sleeves 275 are fixedly connected with the two outer tubes 212 respectively, two ends of the cylindrical tube are inserted into the two sleeves 275 respectively and can rotate, locking grooves 2751 are formed in the sleeves 275, locking blocks 2711 extend from two ends of the keys 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 tube can rotate relative to the sleeves 275.

The lower insert 2743 of the lower half shell 274 is inserted into the sleeve 275, and the body of the lower half shell 274 interfaces with the edge of the sleeve 275.

Upper tabs 2722 extend outwardly from the ends of the upper half-circular shell 275, and the upper tabs 2722 are also inserted into the sleeve 275, with the body of the upper half-circular shell 275 abutting the edges of the sleeve 275.

When the key 271 is pressed, the lock block 2711 is first disengaged from the lock groove 2751, the unlock trigger mechanism 27 itself is unlocked, and then the lock block 2711 is entered into the guide groove 2742. The key 271, the upper half-round case 272 and the lower half-round case 274 can be rotated relative to the sleeve 275 and the upper push rod 21, while the telescopic member 273 is not rotated.

For convenience of user operation, the upper half-circular shell 272 and the lower half-circular shell 274 may be rotated toward the front of the stroller to be spliced into a cylindrical tube.

Further, as shown in fig. 2-3, the telescoping member 273 includes a first connecting member 2731, a second connecting member 2732, a first telescoping rod 2733 and a second telescoping rod 2734, the first connecting member 2731 is connected with one end of the first telescoping rod 2733, the second connecting member 2732 is connected with one end of the second telescoping rod 2734, the other end of the first telescoping rod 2733 is connected with the other end of the second telescoping rod 2734, the first connecting member 2731 and the second connecting member 2732 are respectively connected with an upper steel wire, and slope bosses 2735 are respectively arranged on the first connecting member 2731 and the second connecting member 2732;

Two slope grooves 2721 are formed in the upper semicircular shell 272, 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 retract in a mutually approaching mode.

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

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

When the upper half-round housing 272 rotates in the forward direction, the longer inclined surface pushes the slope lug boss 2735, so that the two slope lug bosses 2735 are close to each other, and the first telescopic rod 2733 and the second telescopic rod 2734 are driven to be close to each other to retract.

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

Wherein, the first connecting piece 2731 and the second connecting piece 2732 are respectively provided with a steel wire hole for connecting one end of an upper steel wire (not shown).

When the first telescopic rod 2733 and the second telescopic rod 2734 are close to each other and retract, one end of the upper steel wire is pulled, and the upper steel wire drives the first rotating joint 25 to unlock.

When the unlocking trigger mechanism 27 needs to be operated, a user holds the upper half-circular shell 272 and the lower half-circular shell 274 with one hand to splice the two into a cylindrical tube, presses the key 271 first, and then rotates the upper half-circular shell 272 and the lower half-circular shell 274 to splice the two into a cylindrical tube. The unlocking can be realized by one-hand operation, and the unlocking can be finished at one time. The operation can be completed without two hands simultaneously or with complex operation gestures or in two operations.

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 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 251 is connected with the upper end of the lower push rod 22, the upper locking piece 253 is connected with the first connecting piece 2731 and the second connecting piece 2732 of 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.

Further, as shown in fig. 4-8, the first rotary joint 25 further includes a gear 254, a first gear slot 2511 is provided in the upper push rod rotary housing 251, a second gear slot 2521 is provided in the lower push rod rotary housing 252,

when the first rotation 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, an upper locking block 2531 of the upper locking member 253 extends downward, and when the upper locking member 253 is inserted into the upper locking groove 2541, the gear 254 is locked, the gear 254 cannot rotate, the upper push rod rotating housing 251 and the lower push rod rotating housing 252 cannot rotate relatively, 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 locking piece 253 is pulled upward by the upper wire, the upper locking block 2531 is released from the upper locking 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 to be completely inserted into the first gear groove 2511, to be withdrawn from the second gear groove 2521, and the lower push rod rotation housing 252 and the upper push rod rotation housing 251 are rotatably coupled only by a rotation shaft (not shown), and the lower push rod rotation housing 252 can be rotated with respect to the upper push rod rotation housing 251, so that the upper push rod 21 is relatively rotated with respect 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 also opened in the first gear groove 2511, the entry groove 2512 axially corresponds to the upper locking groove 2541, and when locked, the upper locking block 2531 of the upper locking member 253 is inserted into the entry groove 2512.

Further, as shown in fig. 4 to 5, the first rotary joint 25 further includes an upper cover 255, and the upper cover 255 covers the outer side surface of the lower push rod rotary housing 252 for shielding 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 pressing spring 257, and a return member 258, the pressing spring 257 is mounted on the spring mount 256, the spring mount 256 includes an insertion arm 2561 extending toward the gear 254, a slot 2543 is provided on the gear 254, and the insertion arm 2561 is inserted into the slot 2543.

The reset member 258 includes a lower wire hook 2581 and a second slope 2582, and the lower wire hook 2581 is connected with one end of the lower wire for driving the lower wire. Two second slopes 2582 are located on the surface, facing the gear 254, of the reset piece 258, corresponding first slopes 2542 are arranged on the gear 254, and the first slopes 2542 are in contact with the second slopes 2582.

When the upper locking member 253 is pulled upward, the push spring 257 expands to push the return member 258 to move toward the gear 254 in the axial direction, and the second slope 2582 pushes the first slope 2542 to move in the axial direction, so that the gear 254 moves toward the first gear slot 2511 and is pulled out of the second gear slot 2521, and unlocking of the first rotary joint 25 is achieved.

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 reset piece 258 to rotate backwards and downwards together, and when the reset piece 258 rotates, the lower steel wire is pulled to unlock the second rotating joint 26.

The unlocking trigger mechanism 27 drives the first rotary joint 25 to unlock through the upper steel wire, and the first rotary joint 25 drives the second rotary joint 26 to unlock through the lower steel wire. The two-stage unlocking mode enables the second rotary joint 26 to be unlocked only after the first rotary 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 simultaneously unlocked, 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 rotational joint 25 is unlocked simultaneously with the second rotational joint 26, it may not be known to the user whether the upper push rod 21 or the lower push rod 22 should be folded first.

The second revolute joint:

as shown in fig. 9 to 15, the second rotational joint 26 includes a lower wire 261 and a lower locking member 262, and after the upper push rod 21 is rotated, the lower wire 261 pulls the lower locking member 262 to unlock the second rotational joint 26.

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

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

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

the rear bracket rotating member 265 is connected to the upper end of the rear bracket 24;

the lower push rod rotating member 263, the front bracket rotating member 264 and the rear bracket rotating member 265 are provided with lower locking grooves 268, the lower locking member 262 is inserted into the lower locking grooves 268, and the second rotary joint 26 is locked.

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

As shown in fig. 14 to 15, the rear bracket rotating member 265 has a wrench shape, is inserted into the front bracket rotating member 264, and is rotatably coupled by the second rotation shaft 267 to achieve the relative rotation of the front bracket 23 and the rear bracket 24.

As shown in fig. 10 to 12, the second rotary joint 26 further includes a rear fork 2651, and the rear fork 2651 clamps the installed lower push rod rotator 263, front bracket rotator 264, and rear bracket rotator 265 therein and is rotatably coupled by a second rotary 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 clamps the mounted push down rod rotator 263, front bracket rotator 264, rear bracket rotator 265, and rear fork 2651 therein and is rotatably connected to the first rotary shaft 266 and the second rotary shaft 267. The outer side surface of the front fork 2641 is covered with a lower cover plate 269, which plays an attractive role due to shielding the internal mounting structure.

In addition to the front fork 2641, the lower push rod rotator 263, the front bracket rotator 264, the rear bracket rotator 265, and the rear fork 2651 are provided with lower locking grooves 268. Wherein, the lower locking groove 268 on the lower push rod rotating member 263 is an elongated groove, the lower locking member 262 can slide up and down in the elongated groove, and the upper end of the lower locking member 262 is connected with the lower end of the lower steel wire 261. When the lower wire 261 pulls the lower locking member 262, the lower locking member 262 slides upward along the elongated groove, 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 member 2651, thereby unlocking the second rotary joint 26.

As shown in fig. 13, a return spring 2611 is provided around the lower wire 261, and when the lower wire 261 is pulled upward, the return spring 2611 is compressed. When the tensile force 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 pivot 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 push down rod 22, and increase stability of the stroller frame in the unfolded state.

The folding process is as follows:

as shown in fig. 1, when the stroller frame 20 is folded, the key 271 is pressed first, and then the cylindrical tube formed by the upper half round shell 272 and the lower half round shell 274 is rotated forward, so as to unlock the first rotating 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 after the upper push rod 21 is folded, unlocking of the second rotary joint 26 is achieved;

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 bracket 24 and the front bracket 23 are naturally closed under the action of gravity, and the whole baby stroller frame 20 is folded, and the folded state is shown in fig. 16.

By implementing the embodiment, the baby stroller frame can be folded quickly, and the folded baby stroller frame is smaller in size. Because the upper push rod 21 and the lower push rod 22 divide the push rod into two sections, 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, which is favorable for step-by-step operation during folding and is simple and easy to understand.

17-29, a schematic view of a seat frame assembly according to a first embodiment of the invention is shown.

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

when the folding seat is folded, after the switch unit 14 is operated, the switch unit 14 drives the backrest rotation joint 13 to unlock, so that the backrest part 11 can rotate and fold relative to the seat part 12;

when the backrest 11 is unfolded, the backrest 11 is rotated and unfolded with respect to the seat 12, and then the backrest rotation joint 13 locks the backrest 11.

Fig. 17 shows the seat frame assembly 10 in an unfolded state, and when the seat frame assembly needs to be folded, the switch unit 14 is operated, and the switch unit 14 drives the backrest rotation joint 13 to be unlocked;

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 as much as the seat part 12.

When it is desired to re-deploy the seat frame assembly 10, the back rest 11 is rotated away from the seat portion 12 until the proper deployment angle is adjusted, and the back rest pivot joint 13 is again locked and the back rest 11 cannot rotate relative to the seat portion 12.

In this embodiment, after the backrest rotation joint 13 is unlocked, the backrest 11 rotates and closes relative to the seat 12, so as to realize the operation of independent folding and closing of the seat frame assembly 10, and the stroller frame can be folded or unfolded independently relative to the stroller frame, thereby facilitating adjustment and being suitable for different use states and requirements.

Further, the backrest 11 includes a hollow U-shaped bar, both ends of which are connected to two backrest rotational joints 13, and a switch unit 14 is installed at the top of the U-shaped bar.

Specifically, the backrest 11 is a complete U-shaped rod, the U-shaped rod is installed upside down during deployment, two ends are respectively connected with the backrest rotating joint 13, and the switch unit 14 is installed at the top end of the middle of the U-shaped rod, that is, the highest position of the U-shaped rod during deployment.

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

The angle of deployment of the back rest 11 is not limited to the angle shown in fig. 2, and the back rest 11 may continue to flip back away from the seat 12 until fully flat, facilitating the infant to lie down.

Alternatively, the backrest 11 may be of other construction, such as: the U-shaped bar is replaced with a back rest plate.

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

when the turnover piece 141 is rotated, the turnover piece 141 pulls the steel wire 142, and the steel wire 142 drives the backrest rotation joint 13 to unlock.

As shown in fig. 18, the flip 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 respectively fixed in the two first wire holes 1411, and then the wires 142 pass through the mounting member 142 into the U-shaped bar, pass out from the ends of the U-shaped bar, and are connected to the backrest rotation joint 13.

In operation, the 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 with the mounting member 142, the lower portion of the turnover member 141 turns backward (right side of fig. 4), one end of the wire 143 is driven to pull backward, and the other end of the wire 143 pulls the backrest rotation joint 13, driving the backrest rotation joint 13 to unlock.

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 sequentially penetrates through the first through hole 1421, the second through hole 111 and the U-shaped rod and then is connected with the backrest rotation joint 13.

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

the first housing 131 is connected to the backrest 11, the second housing 132 is connected to the seat 12, the rotation shaft 133 connects the first housing 131 and the second housing 132, the first housing 131 is rotatable about the rotation shaft 133, the lock pin 134 is connected to the switch unit 14 and installed between the first housing 131 and the second housing 132, and the lock groove 135 is formed in the second housing 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 to be disengaged from the locking groove 135.

Specifically, as shown in fig. 17, the first housing 131 and the second housing 132 are disc-shaped, and the first housing 131 and the second housing 132 are buckled to form a mounting cavity, and the locking pin 134 and the locking groove 135 are mounted in the mounting cavity.

The two backrest rotation joints 13 are respectively positioned at the left side and the right side of the backrest part 11 and the seat part 12, and the two first shells 131 are connected through the cross bar 139, so that the cross bar 139, the two first shells 131, the backrest part 11 and the switch unit 14 are integrated and rotate together.

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

The seat plate 121 is provided with a plurality of hollows, and the seat plate 121 can be coated with seat cushion cloth, so that comfort is improved. The hollowed-out portion 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, which are equally radially distributed around the center of the second housing 132. The plurality of locking grooves 135 facilitate the adjustment of the angle between the backrest portion 11 and the seat portion 12, and the locking pins 134 can be snapped into any one of the locking grooves 135 to meet different needs of users. The user can adjust the backrest 11 to a lying state, a semi-lying state, a sitting state.

Further, as shown in fig. 21 to 23, the back-rest rotary joint 13 further includes a sliding groove housing 136, a sliding member 137 and a jaw plate 138, the sliding groove housing 136 is connected between the back-rest portion 11 and the second housing 132, the sliding member 137 is connected with the switch unit 14 and is capable of sliding along the sliding 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 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.

Specifically, the sliding groove shell 136 is fixedly connected with the end of the U-shaped rod, a semicircular groove is formed on the sliding groove shell 136, the sliding piece 137 is elliptical, and the sliding piece 137 is at least partially inserted into the sliding groove shell 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 driven to slide upward.

The sliding member 137 further includes a pin hole 1372, and the locking pin 134 is inserted into the pin hole 1372 and fixedly connected, so that when the sliding member 137 slides upward, the locking pin 134 is driven to slide upward together, and the locking pin 134 is disengaged from the locking groove 135, so that the backrest rotation joint 13 is unlocked.

The claw plate 138 is provided with four locking grooves 1381 which are completely matched with the shape of the locking groove 135, and the claw plate 138 is connected with the second housing 132 by screws.

As shown in fig. 23, the sliding member 137 further includes a limiting block 1373, and the sliding housing 136 is provided with a limiting groove 1361, where the limiting groove 1361 performs a limiting function when the sliding member 137 slides upward.

The slide 137 also has a reset member attached thereto which allows the slide 137 to slide downwardly along the slide housing 136 when the user releases the flip member 141, retaining the locking pin 134 snapped into the snap slot 1381 and locking slot 135. The return member may be a return spring.

In this embodiment, the slider 137, the slide groove housing 136, and the lock pin 134 are integrally connected to the first housing 131, and the click plate 138 and the lock groove 135 are integrally connected to the second housing 132. The locking is achieved by the cooperation of the locking pin 134 with the locking groove 135 and the locking groove 1381, unlocking is achieved when the locking pin 134 is disengaged from the locking groove 135 and the locking groove 1381, the backrest part 11 can rotate relative to the seat part 12, and the angle of the backrest part 11 can be adjusted or the backrest part can be completely folded.

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

the grab bar rotating joint 16 includes a pushing member 161, a linkage member 162, a locking member 163 and a connecting member 164, the pushing member 161 is installed in the first housing 131 and rotates with the first housing 131, the locking member 163 is embedded in the connecting member 164 and locks the connecting member 164, and the connecting member 164 is fixedly connected with the grab bar 15;

when the pushing member 161 rotates toward the linkage member 162, the linkage member 162 is pushed to move along a straight line, the linkage member 162 drives the locking member 163 to be separated from the connecting member 164, and the grab rail 15 and the connecting member 164 can be rotated and folded.

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

The control of the backrest rotary joint 13 to the grab handle rotary joint 16 can be realized through the linkage 162, and when the backrest rotary joint 13 is unlocked and the backrest 11 rotates towards the seat part 12, the grab handle rotary joint 16 is driven to be unlocked, so that the grab handle 15 is turned downwards and folded.

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

As shown in fig. 24, the locking member 163 has a gear structure with four straight teeth, and one of the teeth of the locking member 163 is inserted into the linkage member 162, and when the linkage member 162 moves linearly, the locking member 163 is driven 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 connecting 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 rotate. The grab bar 15 can be rotated to fold when the linkage 162 disengages the locking member 163 from the nest.

Since the locking member 163 has four straight teeth and is uniformly spaced, the corresponding insert slot also has four tooth slots. The angle between the grab rail 15 and the seat 12 can be adjusted when the grab rail is rotated.

As shown in fig. 21, the outer side of the seat plate 121 is provided with a mounting groove 125 corresponding to the shape of the locking piece 163, wherein the lowermost tooth slot of the mounting groove 125 is open, and one straight tooth of the locking piece 163 can pass through to act with the linkage piece 162. When the locking member 163 is disengaged 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 linkage 162 includes a contact portion 1621 and a chute 1622, and the pushing block 1612 contacts the contact portion 1621 and pushes the linkage 162 to move, one straight tooth of the locking member 163 is caught in the chute 1622, and when the linkage 162 moves, the chute 1622 pushes the locking member 163 out of the connection member 164.

Specifically, when the first housing 131 rotates clockwise about the arrow direction in fig. 9, the pushing block 1612 pushes the contact portion 1621 to move rightward,

in the orientation of fig. 25, the linkage member 162 moves leftward, and the chute 1622 moves the locking member 163 outwardly in the axial direction thereof, out of the engagement groove of the connecting member 164.

The linkage 162 is further provided with a reset member (not shown), and when the first housing 131 is unfolded, the push block 1612 is reversely rotated to be separated from the contact portion 1621, the linkage 162 is reset under the action of the reset member, and moves to the right in fig. 10, and the chute 1622 pushes the locking member 163 back into the insertion groove to be locked again with the connecting member 164. The return member may be a return 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, so as to connect the extension rod 122 and the seat plate 121.

Alternatively, the extension rod 122 can be angularly adjusted with respect to the seat plate 121; when the infant is seated, the extension bar 122 is turned downward so that the calf of the infant can naturally be bent downward; when the infant is lying down, the extension bar 122 is turned upwards, remaining in the same plane as the seat plate 121, for supporting the legs and feet of the infant.

Further, as shown in fig. 27, a ceiling unit 17 is further attached to the seat portion 11, and the ceiling unit 17 includes two ceiling levers 171 and a ceiling pivot joint 172. The ceiling rods 171 are used for supporting the tent cloth, and the ceiling rotary joints 172 are used for adjusting the included angle between the two ceiling rods 171, so that the tent cloth can be unfolded or folded conveniently. The roof pivot joint 172 is mounted on both side bars of the U-shaped bar of the backrest portion 11 to pivot with the backrest portion 11. In this embodiment, when the seat frame assembly 10 needs to be folded, as shown in fig. 12, the turning member 141 of the switch unit 14 is turned backward, and the switch unit 14 drives the backrest rotation joint 13 to be unlocked;

Then, the backrest 11 is pushed to turn downwards, and in the process of pushing the backrest 11, unlocking of the armrest rotating joint 16 is achieved, and then the armrest rod 15 is pushed to turn downwards together. Until the grab bar 15 and the back rest 11 are fully folded.

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

As shown in fig. 27 and 29, the handle hole 1212 is formed at the rear side of the seat plate 121, and when the seat frame assembly 10 is completely folded, the user's hand penetrates into the handle hole 1212 to lift the entire stroller or the entire seat frame assembly 10 for easy transportation.

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

Fig. 30 to 32 are schematic structural views of a stroller according to a first embodiment.

The stroller includes a stroller frame 20, the stroller frame 20 including a push rod 21, a front support 22, a rear support 23, and wheels 24, and a seat frame assembly 10, the seat frame assembly 10 being mounted to the stroller frame 20.

The stroller frame 20 further includes a frame pivot joint 26, and the front bracket 22, the rear bracket 23, and the push rod 21 are connected by the frame pivot joint 26 and are rotatably folded. 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 and the stroller frame 20 is folded.

Further, as shown in fig. 31 to 32, the front bracket 22 is connected to the seat portion 12, the rear bracket 23 is connected to the back pivot joint 13, and the back pivot joint 13 is connected to the push rod 21 through the connecting rod 25.

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

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

The second housing 132 of the backrest rotation joint 13 is also rotatably connected to the push rod 21 through a 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 function as 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 remain unchanged.

When the stroller frame 20 is folded, the connection points of the first connection post 123, the second connection post 1322, and the connection rod 25 rotate, and the seat frame assembly 10 rotates with respect to the push rod 21, the front bracket 22, and the rear bracket 23.

By implementing the embodiment, the positioning of the seat frame assembly 10 can be realized, and the seat frame assembly 10 and the stroller frame 20 are independently folded for taking up, so that the flexibility of adjustment is increased, and different requirements of users are met.

Embodiment two:

fig. 33 to 35 are schematic structural views of a stroller according to a second embodiment.

The stroller includes a seat frame assembly 10 and also includes a stroller frame 20 with the seat frame assembly 10 mounted on the stroller frame 20.

The seat frame assembly 10 includes a grab bar 15 and a back pivot 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 push down rod 22, and the other end is connected to the backrest rotation 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 rail 15 of the seat frame assembly 10.

The first, second and third connecting

bars

28, 29a, 29b serve as support links for the seat frame assembly 10. As shown in fig. 33, the stroller can maintain the seat frame assembly 10 in a stable condition when deployed. As shown in fig. 34, the stroller is folded to allow the seat frame assembly 10 to be received in the stroller frame 20.

In this embodiment, the seat frame assembly 10 can be folded independently with respect 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 with the stroller frame 20.

By implementing the embodiment, the baby stroller can be folded quickly and conveniently. And the seat frame assembly 10 and the baby stroller frame 20 are independently folded for taking up, so that the flexibility of adjustment is improved, and different requirements of users are met.

Embodiment four:

as shown in fig. 36, the stroller folding method includes the steps of:

s101: an operation switch unit 14 for unlocking the backrest rotation joint 13;

s102: the backrest 11 is turned forward and downward, so that the backrest 11 approaches the seat 12;

s103: operating the unlocking trigger mechanism 27 to unlock the first rotating joint 25;

further, when the unlock trigger mechanism 27 is operated,

first, the key 271 of the unlock trigger 27 is pressed;

the unlock trigger 27 is then rotated forward.

S104: the upper push rod 21 and the lower push rod 22 are turned backwards and downwards to approach each other;

s105: the second rotary joint 26 is unlocked, and the push rod 22 is turned forwards and downwards to approach the front bracket 23;

s106: lifting the handle holes 1212 on the seat frame assembly 10, the front bracket 23 and the rear bracket 24 collapse naturally under the force of gravity.

Through implementing the embodiment, the unlocking triggering mechanism is operated to unlock the first rotating joint, the upper push rod is turned backwards and downwards to unlock the second rotating joint, then the lower push rod is turned forwards and downwards, and finally the rear bracket and the front bracket are folded.

What has been described above is merely illustrative of the principles and preferred embodiments of the present invention. It should be noted that several other variants are possible to those skilled in the art on the basis of the principle of the invention and should also be considered as the scope of protection of the present invention.

Claims

1. A stroller comprising a seat frame assembly (10) and a stroller frame (20), characterized in that the seat frame assembly (10) is independently foldable relative to the stroller frame (20);

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), a second rotating joint (26) and an unlocking triggering mechanism (27), wherein the unlocking triggering 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 front support (23) and the upper end of the rear support (24) through the second rotating joint (26), and the unlocking triggering mechanism (27) is used for triggering the unlocking of the first rotating joint (25), and the unlocking of the second rotating joint (26) is triggered after the lower push rod (22) is rotated;

Wherein the seat frame assembly is mounted on the stroller frame and when the entire stroller is to be folded, the seat frame assembly is first folded and then the stroller frame is folded; wherein the seat frame assembly (10) includes a handle aperture for lifting the stroller to collapse the front and rear brackets of the stroller frame when the stroller is folded;

wherein the second rotary joint (26) comprises two lower push rod rotary pieces (263) connected with the lower end of the lower push rod (22), a front support rotary piece (264) connected with the upper end of the front support (23), and a rear support rotary piece (265) connected with the upper end of the rear support (24);

the lower push rod rotating piece (263) is rotatably connected with the front support rotating piece (264) through a first rotating shaft (266), and the front support rotating piece (264) is rotatably connected with the rear support rotating piece (265) through a second rotating shaft (267);

wherein the two push rod rotating pieces (263) clamp the front bracket rotating piece (264) in the middle and are rotatably connected through the first rotating shaft (266); and is also provided with

The second rotary joint (26) further comprises a rear fork member (2651), and the rear fork member (2651) clamps the push rod rotary member (263), the front support rotary member (264) and the rear support rotary member (265) therein and is rotatably connected through the second rotary shaft (267).

2. The stroller of claim 1, wherein the unlocking trigger mechanism (27) comprises a key (271), and the unlocking trigger mechanism (27) is used for unlocking itself after pressing the key (271) and driving the first rotating joint (25) to unlock by rotating; the unlocking triggering mechanism (27) further comprises an upper semicircular shell (272), a telescopic part (273), a spring and a lower semicircular shell (274), wherein 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 arranged between the lower semicircular shell (274) and the spring, the telescopic part (273) is connected with the upper semicircular shell (272), and two ends of the telescopic part (273) are respectively connected with upper steel wires;

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) are compressed after rotating, the telescopic part (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 bar (21) comprises an inner tube (211) and an outer tube (212), the cylinder tube being sleeved outside the inner tube (211);

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

4. The stroller of claim 2, wherein the telescoping member (273) comprises a first connecting member (2731), a second connecting member (2732), a first telescoping rod (2733) and a second telescoping rod (2734), the first connecting member (2731) is connected with one end of the first telescoping rod (2733), the second connecting member (2732) is connected with one end of the second telescoping rod (2734), the other end of the first telescoping rod (2733) is connected with the other end of the second telescoping rod (2734), the first connecting member (2731) and the second connecting member (2732) are respectively connected with an upper steel wire, and ramp bosses (2735) are respectively arranged on the first connecting member (2731) and the second connecting member (2732);

Two slope grooves (2721) are formed in the upper semicircular shell (272), 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 retract in a mutually approaching mode.

5. The stroller of claim 1, wherein the first swivel joint (25) comprises an upper push rod swivel housing (251), a lower push rod swivel housing (252), and an upper lock (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 triggering 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 embedded in the first gear groove (2511) and the second gear groove (2521) when the first rotary joint (25) is locked;

When the upper locking piece (253) moves upwards, the gear (254) is separated from the first gear groove (2511) or the second gear groove (2521), and the first rotating joint (25) is unlocked.

6. The stroller of claim 1, wherein the second rotational joint (26) comprises a lower wire (261) and a lower locking member (262), the lower wire (261) pulling the lower locking member (262) to unlock the second rotational joint (26) after the upper push rod (21) is rotated; the second rotary joint (26) comprises a push rod rotary piece (263), a front bracket rotary piece (264) and a rear bracket rotary 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 support rotating piece (264) through a first rotating shaft (266);

the front support rotating piece (264) is connected with the upper end of the front support (23), and the front support rotating piece (264) is rotatably connected with the rear support 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);

the lower push rod rotating piece (263), the front support rotating piece (264) and the rear support rotating piece (265) are respectively provided with a lower locking groove (268), the lower locking piece (262) is inserted into the lower locking groove (268), and the second rotating joint (26) is locked.

7. The stroller of any one of claims 1-6, wherein the seat frame assembly (10) comprises a back portion (11), a seat portion (12), a switch unit (14), and a back pivot joint (13), the back pivot joint (13) connecting the back portion (11) and the seat portion (12), the switch unit (14) being mounted on the back portion (11);

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

when the backrest part (11) is rotated during unfolding, the backrest part (11) is rotated and unfolded relative to the seat part (12), and then the backrest rotation joint (13) locks the backrest part (11).

8. A stroller according to claim 7, characterized in that the backrest part (11) comprises a hollow U-shaped bar, the two ends of which are connected to two backrest rotational joints (13), the switch unit (14) being mounted on top of the U-shaped bar;

the switch unit (14) comprises a turnover piece (141), a mounting piece (142) and a steel wire (143), wherein the mounting piece (142) is buckled at the top of the U-shaped rod, the turnover piece (141) is rotationally 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 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 unlock.

9. The stroller of claim 8, wherein the mounting member (142) has a first through hole (1421) formed therein, the U-shaped rod has a second through hole (111) formed therein, and the wire is sequentially inserted into the first through hole (1421), the second through hole (111), and the U-shaped rod and then connected to the backrest rotation joint (13).

10. The stroller of claim 7, wherein the back pivot 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 housing (131) is connected with the backrest part (11), the second housing (132) is connected with the seat part (12), the rotating shaft (133) is connected with the first housing (131) and the second housing (132), the first housing (131) can rotate around the rotating shaft, the locking pin (134) is connected with 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 locking device is unlocked, the switch unit (14) drives the locking pin (134) to be separated from the locking groove (135).

11. The stroller of claim 10, wherein the back pivot joint (13) further comprises a sliding groove housing (136), a sliding member (137) and a jaw plate (138), the sliding groove housing (136) is connected between the back portion (11) and the second housing (132), the sliding member (137) is connected with the switch unit (14) and is capable of sliding along the sliding groove housing (136), the jaw plate (138) is mounted on the second housing (132), a plurality of clamping grooves (1381) on the jaw 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 clamping grooves and the locking grooves (135).

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

the grab bar rotating 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 arranged in the first shell (131) and rotates along 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);

The pushing piece (161) pushes the linkage piece (162) to move along a straight line when rotating towards the linkage piece (162), the linkage piece (162) drives the locking piece (163) to be separated from the connecting piece (164), and the grab rail (15) and the connecting piece (164) can rotate and fold.

13. The stroller of claim 12, wherein the pushing member (161) comprises 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);

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

14. A stroller folding method for a stroller according to any one of claims 1-13, when the seat frame assembly is mounted on the stroller frame, comprising the steps of:

Operating a switch unit (14) of the seat frame assembly (10), unlocking a back pivot joint (13) of the seat frame assembly (10);

-tilting the backrest portion (11) of the seat frame assembly (10) forward and downward, bringing the backrest portion (11) closer to the seat portion (12) of the seat frame assembly (10);

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