CN110667681A - Baby stroller and folding method thereof - Google Patents

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 installed 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 and the upper end of the rear support through the second rotating joint, the unlocking trigger mechanism is used for triggering unlocking of the first rotating joint and rotating to trigger the lower push rod to unlock the second rotating joint. The invention also discloses a folding method of the baby stroller. The folding seat frame component is convenient to operate and fold, has smaller volume after being folded, and can be independently folded, folded and adjusted.

Description

How to fold baby strollers and strollers

technical field

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

Background technique

The retracting method of the existing baby stroller frame is complicated, the user is not easy to operate, and the folded volume is large.

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

Therefore, it is necessary to design a baby stroller and a baby stroller folding method which is convenient to operate and retract the seat frame assembly, has a smaller volume after being folded, and can be folded, folded and adjusted independently.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a stroller and a method for folding a stroller with a seat frame assembly that is easy to operate and retract, has a smaller volume after being folded, and can be independently folded, folded, and adjusted.

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

The baby stroller frame includes 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, and the unlocking trigger mechanism is installed on the upper push rod, so the The lower end of the upper push rod and the upper end of the lower push rod are connected through the first rotation joint, and the lower end of the lower push rod and the upper ends of the front bracket and the rear bracket are connected by the second rotation The unlocking trigger mechanism is used for triggering the unlocking of the first rotating joint, and after rotating the push-down rod, the second rotating joint is triggered to unlock.

Further, the unlocking trigger mechanism includes a button, the unlocking trigger mechanism is used to unlock itself after pressing the button, and drives the first rotation joint to unlock by rotating; the unlocking trigger mechanism also includes 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 into a cylindrical tube, a part of the button protrudes from the lower semicircular shell, and the button is installed on the lower semicircular shell and the Between the springs, the telescopic piece is connected with the upper semi-circular shell, and the two ends of the telescopic piece are respectively connected with upper steel wires;

After the button is pressed, the unlocking trigger mechanism is unlocked, the button, the upper semicircular shell and the lower semicircular shell rotate to compress the telescopic piece, and the telescopic piece pulls the upper steel wire to drive the The first rotary joint is unlocked.

Further, the upper push rod includes an inner tube and an outer tube, and the cylindrical tube is sleeved outside the inner tube;

The unlocking trigger mechanism further comprises a sleeve, the sleeve is fixedly connected with the outer pipe, the two ends of the cylindrical pipe are respectively inserted into the sleeve and can be rotated, and the sleeve is provided with a lock The two ends of the button extend out of the locking block, the locking block is inserted into the locking groove, when the button is pressed, the locking block comes out of the locking groove, the The cylindrical tube is rotatable relative to the sleeve.

Further, the telescopic piece includes a first connecting piece, a second connecting piece, a first telescopic rod and a second telescopic rod, the first connecting piece is connected with one end of the first telescopic rod, and the second connecting piece is connected to one end of the first telescopic rod. The connecting piece 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, and the first connecting piece and the second connecting piece are respectively connected with one The upper steel wire, the first connecting piece and the second connecting piece are all provided with slope bosses;

The upper semicircular shell is provided with two ramp grooves, and the ramp bosses are embedded in the ramp grooves. When the upper semicircular shell rotates, the ramp grooves push the two ramp bosses to drive the first ramp. A telescopic rod and the second telescopic rod are retracted close to each other.

Further, the first rotating joint includes an upper push rod rotating casing, a lower push rod rotating casing and an upper locking member;

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, and the upper locking piece is connected to the unlocking trigger mechanism through the upper steel wire When the upper wire pulls the upper locking piece, the first rotating joint is unlocked; the first rotating joint further includes a gear, the upper push rod rotating housing is provided with a first gear groove, and the lower push rod A second gear slot is arranged in the rotating housing,

When the first rotating joint is locked, the gear is embedded in the first gear slot and the second gear slot;

When the upper locking member moves upward, the gear is disengaged from the first gear slot or the second gear slot, and the first rotating joint is unlocked.

Further, the second rotating joint includes a lower wire and a lower locking member, and after the upper push rod is rotated, the lower wire pulls the lower locking member to unlock the second rotating joint; the second rotating joint Including lower push rod rotating parts, front support rotating parts and rear support rotating parts;

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

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

the rear bracket rotating member is connected with the upper end of the rear bracket;

A lower locking groove is formed on the lower push rod rotating member, the front support rotating member and the rear support rotating member, the lower locking member is inserted into the lower locking groove, and the second rotating joint is locked .

Further, the seat frame assembly includes a backrest portion, a seat portion, a switch unit and a backrest pivot joint, the backrest pivot joint connects the backrest portion and the seat portion, and the switch unit is mounted on the backrest portion;

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

When unfolding, the backrest portion is rotated, and after the backrest portion is rotated and unfolded relative to the seat portion, the backrest pivot joint locks the backrest portion.

Further, a first through hole is formed on the mounting member, a second through hole is formed on the U-shaped rod, and the steel wire is sequentially inserted into the first through hole, the second through hole and the The U-shaped rod is then connected with the backrest rotating joint;

The backrest rotation joint includes a first casing, a second casing, a rotating shaft, a locking pin and a locking groove;

The first casing is connected to the backrest portion, the second casing is connected to the seat portion, the rotating shaft is connected to the first casing and the second casing, and the first casing is connected to the seat portion. The body is rotatable around the rotating shaft, the locking pin is connected to the switch unit and is installed between the first casing and the second casing, and the locking groove is formed in the second casing superior;

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

When unlocking, the switch unit drives the locking pin to escape from the locking groove.

Further, the backrest rotating joint further includes a sliding groove shell, a sliding member and a claw plate, the sliding groove casing is connected between the backrest portion and the second housing, and the sliding member is connected to the switch. The unit is connected and can slide along the sliding groove shell, the claw plate is mounted on the second casing, the plurality of clamping grooves on the claw plate correspond to the locking grooves, and the One end is mounted on the sliding member, and the other end is inserted into the card slot and the locking slot.

Further, the seat frame assembly further includes a handrail and a handrail rotating joint;

The handrail rotating joint includes a push piece, a linkage piece, a locking piece and a connecting piece, the pushing piece is installed in the first housing and rotates with the first housing, and the locking piece is embedded in the connecting piece and lock the connecting piece, and the connecting piece is fixedly connected with the handrail;

When the pushing member rotates toward the linking member, the linking member is pushed to move in a straight line, the linking member drives the locking member to come out of the connecting member, and the handrail and the connecting member can be rotated and folded.

Further, the pusher includes an arc bar and a push block, the arc bar is centered on the rotation center of the first housing, and the push block is located at one end of the arc bar;

The linkage member includes a contact portion and an inclined groove, the push block contacts the contact portion and pushes the linkage member to move, at least a part of the locking member is snapped into the inclined groove, and the linkage member moves , the chute pushes the locking piece to disengage from the connecting piece.

The present invention also provides a baby stroller folding method for any one of the above-mentioned baby strollers, comprising the following steps:

operate the switch unit to unlock the backrest rotation joint;

Flip the backrest forward and downward so that the backrest is close to the seat;

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

Turn the upper push rod backward and downward to be close to the lower push rod;

The second rotating joint is unlocked, and the lower push rod is turned forward and downward to approach the front bracket;

Lift the handle hole on the seat frame assembly, and the front bracket and the rear bracket are folded.

After adopting the above-mentioned technical scheme, it has the following beneficial effects:

The present invention unlocks the first rotating joint by operating the unlocking trigger mechanism, the upper push rod is turned backward and downward to unlock the second rotating joint, then the lower push rod is turned forward and downward, and finally the rear bracket and the front bracket are closed. The invention is convenient to operate and collect the car, and the folded volume can be smaller, which is convenient for storage;

In addition, the seat frame assembly can be independently folded and folded, and can be folded or unfolded independently relative to the stroller frame, which is convenient for adjustment and is suitable for different use states and needs.

Description of drawings

The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. It should be understood that these drawings are only for the purpose of illustration and are not intended to limit the protection scope of the present invention. In the picture:

Fig. 1 is the perspective view of the unfolded state of the baby stroller frame in the first embodiment of the present invention;

2 is an exploded top view of the unlocking trigger mechanism of the baby stroller frame in the first embodiment of the present invention;

FIG. 3 is an exploded view from the bottom of the unlocking trigger mechanism of the baby stroller frame in the first embodiment of the present invention;

4 is an exploded view from the left side of the first rotating joint of the baby stroller frame in Embodiment 1 of the present invention;

5 is an exploded view from the right side of the first rotating joint of the baby stroller frame in the first embodiment of the present invention;

6 is a partial enlarged view of the first rotating joint of the baby stroller frame in the first embodiment of the present invention;

Fig. 7 is the left perspective exploded view of Fig. 6;

Fig. 8 is the right perspective exploded view of Fig. 6;

9 is a perspective view of the second pivot joint of the baby stroller frame in Embodiment 1 of the present invention;

10 is an exploded view from the left side of the second rotating joint of the baby stroller frame in Embodiment 1 of the present invention;

11 is an exploded view from the right side of the second rotating joint of the baby stroller frame in Embodiment 1 of the present invention;

12 is a partial enlarged view of the second rotating joint of the baby stroller frame in the first embodiment of the present invention;

Fig. 13 is a partial enlarged view of the rear fork member omitted in Fig. 12;

Fig. 14 is a partial enlarged view of Fig. 13 omitting the lower push rod rotating member and the lower locking member;

Fig. 15 is a partial enlarged view after omitting the front bracket rotating member in Fig. 14;

16 is a perspective view of the folded state of the baby stroller frame in the first embodiment of the present invention;

17 is a perspective view of the unfolded state of the seat frame assembly in the first embodiment of the present invention;

18 is a perspective view of the switch unit of the seat frame assembly in the first embodiment of the present invention;

19 is a side view of the switch unit of the seat frame assembly in the first embodiment of the present invention;

20 is a partial enlarged view of the backrest of the seat frame assembly in the first embodiment of the present invention;

Fig. 21 is a partial enlarged view of the backrest pivot joint of the seat frame assembly in the first embodiment of the present invention;

Figure 22 is an exploded view of one side of the seat frame assembly at the backrest pivot joint in the first embodiment of the present invention;

Figure 23 is an exploded view of the other side of the seat frame assembly at the backrest pivot joint in the first embodiment of the present invention;

Fig. 24 is a partial enlarged view of the rotating joint of the armrest of the seat frame assembly in the first embodiment of the present invention;

Fig. 25 is another partial enlarged view of the pivot joint of the armrest of the seat frame assembly in the first embodiment of the present invention;

Fig. 26 is a partial enlarged view of the seat portion of the seat frame assembly in the first embodiment of the present invention;

27 is another perspective view of the seat frame assembly in the first embodiment of the present invention;

Fig. 28 is a side view of the folded state of the seat frame assembly in the first embodiment of the present invention;

29 is a perspective view of the folded state of the seat frame assembly in Embodiment 1 of the present invention;

30 is a perspective view of a baby stroller in Embodiment 1 of the present invention;

31 is a partial enlarged view of the front support of the baby stroller in the first embodiment of the present invention;

32 is a partial enlarged view of the rear support of the baby stroller in the first embodiment of the present invention;

Fig. 33 is the perspective view of the unfolded state of the baby stroller in the second embodiment of the present invention;

34 is a perspective view of the folded state of the baby stroller in the second embodiment of the present invention;

Figure 35 is a partial enlarged view of the baby stroller in the second embodiment of the present invention;

36 is a flow chart of a method for folding a baby stroller in Embodiment 3 of the present invention.

Reference number comparison table:

Seat Frame Assembly 10:

The backrest part 11: the second through hole 111;

Seat part 12: seat plate 121, extension rod 122, first connecting column 123, shielding plate 124, installation groove 125, embedded groove 1211, handle hole 1212;

Backrest rotation joint 13: first shell 131, second shell 132, rotating shaft 133, locking pin 134, locking groove 135, sliding groove shell 136, sliding piece 137, claw plate 138, cross bar 139, guide groove 1321 , the second connecting column 1322, the limit slot 1361, the second wire hole 1371, the pin hole 1372, the limit block 1373, the card slot 1381;

The switch unit 14: a turning piece 141, a mounting piece 142, a steel wire 143, a first steel wire hole 1411, and a first through hole 1421;

Handrail 15;

Handrail rotating joint 16: push piece 161, linkage piece 162, locking piece 163, connecting piece 164, arc strip 1611, push block 1612, contact part 1621, chute 1622;

Ceiling unit 17: ceiling rod 171, ceiling rotating joint 172;

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

Upper push rod 21: inner tube 211, outer tube 212;

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

Second rotating joint 26: lower wire 261, lower locking member 262, lower push rod rotating member 263, front support rotating member 264, rear support rotating member 265, first rotating shaft 266, second rotating shaft 267, lower locking groove 268, lower Cover plate 269, return spring 2611, front fork 2641, rear fork 2651;

Unlock trigger mechanism 27: button 271, upper semicircular shell 272, telescopic piece 273, lower semicircular shell 274, sleeve 275, spring mounting block 276, locking block 2711, spring mounting post 2712, protruding strip 2713, ramp groove 2721, upper Insert piece 2722, first connecting piece 2731, second connecting piece 2732, first telescopic rod 2733, second telescopic rod 2734, slope boss 2735, key hole 2741, guide slot 2742, lower insert piece 2743, locking slot 2751 , spring slot 2761;

Seat frame assembly 10 : backrest pivot joint 13 , armrest bar 15 , first connecting column 123 , handle hole 1212 , second connecting column 1322 .

Detailed ways

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

It is easy to understand that, according to the technical solutions of the present invention, without changing the essential spirit of the present invention, those of ordinary skill in the art can replace various structural modes and implementation modes with each other. Therefore, the following specific embodiments and accompanying drawings are only exemplary descriptions of the technical solutions of the present invention, and should not be regarded as all of the present invention or as limitations or restrictions on the technical solutions of the invention.

Orientation terms such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the configurations shown in the respective drawings, which are It is a relative concept, so it may change accordingly according to its different locations and different usage states. Therefore, these and other terms of orientation should not be construed as limiting.

Example 1:

As shown in Figures 1-16, it is a schematic diagram of the structure of the baby stroller frame in the first embodiment.

As shown in FIG. 1, the baby 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. The mechanism 27 is installed on the upper push rod 21, the lower end of the upper push rod 21 and the upper end of the lower push rod 22 are connected by a first rotating joint 25, and the lower end of the lower push rod 22 passes through the upper ends of the front bracket 23 and the rear bracket 24. The second rotating joint 26 is connected, and the unlocking trigger mechanism 27 is used for triggering the unlocking of the first rotating joint 25 , and the second rotating joint 26 is unlocked after rotating the lower push rod 22 .

In this embodiment, the first rotating joint 25 is unlocked by operating the unlocking trigger mechanism 27, the upper push rod 21 is turned backward and downward to unlock the second rotating joint 26, and then the lower push rod 21 is turned forward and downward, and finally the rear bracket 24 is folded with the front bracket 23, the present invention is convenient to operate and retract the stroller, and the volume of the folded baby stroller frame can be smaller.

To unlock the trigger mechanism:

As shown in FIGS. 2-3 , the unlocking trigger mechanism 27 includes a button 271 , and the unlocking trigger mechanism 27 is used to unlock itself after pressing the button 271 , and to drive the first rotating joint 25 to unlock by rotating.

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

Further, the unlocking trigger mechanism 27 also includes an upper semicircular shell 272, a telescopic piece 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, and a part of the button 271 is inserted from the bottom. The semicircular shell 274 extends, the button 271 is installed between the lower semicircular shell 274 and the spring, the telescopic piece 273 is connected to the upper semicircular shell 272, and the two ends of the telescopic piece 273 are respectively connected with at least one upper steel wire (not shown);

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

Specifically, as shown in FIG. 3 , the button 271 is in the shape of a long bar, and the protruding strip 2713 of the button 271 is in the shape of a long bar, which is exposed to the outside of the unlocking trigger mechanism 27 and has enough area to allow four fingers to simultaneously act on the on the ridge 2713.

A part of the button 271 is installed inside the lower semicircular shell 274 , and the protruding strip 2713 protrudes downward from the button hole 2741 of the lower semicircular shell 274 . Locking blocks 2711 extend outward from both ends of the button 271 , and lower inserts 2743 extend from the inner sides of both ends of the lower semicircular shell 274 . middle. When the button 271 is pressed, it will not come out of the guide groove 2742, and the button 271 and the lower semicircular shell 274 will rotate together.

As shown in FIG. 2 , a groove is formed on the upper surface of the protruding strip 2713 of the button 271 , and two spring mounting posts 2712 are installed in the groove. The spring mounting posts 2712 are used to set springs (not shown).

As shown in FIG. 3 , the surface of the spring mounting block 276 facing the button 271 is provided with two circular spring grooves 2761 . The top of the spring is inserted into the spring grooves 2761 . against. When the button 271 is pressed, the button 271 pushes the spring upward; when the button 271 is released, the button 271 returns to the original position under the action of the spring, and the protruding strip 2713 protrudes downward from the button 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 also includes two sleeves 275. The sleeves 275 are respectively fixedly connected with the two outer tubes 212. The two ends of the cylindrical tubes are respectively inserted into the two sleeves 275 and can be rotated. The locking groove 2751, the two ends of the button 271 extend out of the locking block 2711, the locking block 2711 is inserted into the locking groove 2751, when the button 271 is pressed, the locking block 2711 is released from the locking groove 2751, and the cylindrical tube can be relative to the locking groove 2751. The sleeve 275 rotates.

The lower insert piece 2743 of the lower semicircular shell 274 is inserted into the sleeve 275 , and the main body of the lower semicircular shell 274 is butted against the edge of the sleeve 275 .

Upper inserts 2722 extend outward from both ends of the upper semicircular shell 275 , and the upper inserts 2722 are also inserted into the sleeve 275 .

When the button 271 is pressed, the locking block 2711 first comes out of the locking groove 2751 , the unlocking trigger mechanism 27 unlocks itself, and then the locking block 2711 enters the guide groove 2742 . The button 271 , the upper semicircular shell 272 and the lower semicircular shell 274 can rotate relative to the sleeve 275 and the upper push rod 21 , and the telescopic member 273 does not rotate at this time.

In order to facilitate the user's operation, the upper semi-circular shell 272 and the lower semi-circular shell 274 can be rotated toward the front of the stroller to form a cylindrical tube.

Further, as shown in FIGS. 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 , and the first connecting member 2731 and the first telescopic rod 2733 One end of the second telescopic rod 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 An upper steel wire is connected, and both the first connecting piece 2731 and the second connecting piece 2732 are provided with slope bosses 2735;

The upper semicircular shell 272 has two ramp grooves 2721. The ramp bosses 2735 are embedded in the ramp grooves 2721. When the upper semicircular shell 272 rotates, the ramp grooves 2721 push the two ramp bosses 2735 to drive the first telescopic rod 2733 and the second The telescopic rods 2734 are retracted close to each other.

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 and includes two inclined surfaces. The ramp groove 2721 also has two inclined surfaces, wherein the length of one inclined surface is greater than the length of the other inclined surface.

When the upper semicircular shell 272 is rotated forward, the longer slope pushes the ramp bosses 2735, so that the two ramp bosses 2735 approach each other, driving the first telescopic rod 2733 and the second telescopic rod 2734 to retract towards each other.

When the user releases the unlocking trigger mechanism 27, the first telescopic rod 2733 and the second telescopic rod 2734 extend away from each other, the ramp boss 2735 pushes the upper semicircular shell 272 to rotate in the opposite direction, and the upper semicircular shell 272 drives the lower semicircular shell 274 and the buttons 271 are reversed back together.

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

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

When it is necessary to operate the unlocking trigger mechanism 27, one hand of the user holds the upper semicircular shell 272 and the lower semicircular shell 274 and splices them into a cylindrical tube, first presses the button 271, and then rotates the upper semicircular shell 272 and the lower semicircular shell 274 to form a cylinder Tube. One-handed operation to unlock, and can be done at one time. There is no need for two hands to operate at the same time, or complex operation gestures, or two operations to complete the operation.

The first rotary joint:

As shown in FIGS. 4-8 , the first rotating joint 25 includes an upper push rod rotating casing 251 , a lower push rod rotating casing 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, and the upper locking piece 253 is connected to the first connecting piece 2731 of the unlocking trigger mechanism 27 through the upper wire Connected to the second connecting piece 2732 , the first rotating joint 25 is unlocked when the upper wire pulls the upper locking piece 253 .

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

When the first rotating joint 25 is locked, the gear 254 is embedded in 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 rotating joint 25 is unlocked.

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

The gear 254 includes a plurality of teeth. An upper locking groove 2541 is defined on the edge of the gear 254. The upper locking block 2531 of the upper locking member 253 extends downward and is inserted into the upper locking groove 2541. When the upper locking member 253 locks the gear 254 , the gear 254 cannot be rotated, and 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 be rotated and folded. .

When the upper locking member 253 is pulled upward by the upper steel wire, the upper locking block 2531 is disengaged from the upper locking groove 2541 . At this time, the reset member 258 pushes the gear 254 to move toward the first gear groove 2511 in the axial direction, and is completely embedded in the first gear groove 2511 and comes out of the second gear groove 2521. The lower push rod rotates the housing 252 and the upper push rod. The rotating casing 251 is rotatably connected only by a rotating shaft (not shown), and the lower push rod rotating casing 252 can rotate relative to the upper push rod rotating casing 251 , so that the upper push rod 21 rotates relative to the lower push rod 22 .

Further, as shown in Figures 6-7, the upper locking member 253 is installed in the connecting pipe 2513 of the upper push rod rotating housing 251, and the first gear groove 2511 is also provided with an entry groove 2512 that communicates with the connecting pipe 2513 to enter The slot 2512 corresponds to the upper locking slot 2541 in the axial direction. When locked, the upper locking block 2531 of the upper locking piece 253 is inserted into the entry slot 2512 .

Further, as shown in FIGS. 4-5 , the first rotating joint 25 further includes an upper cover plate 255 , which covers the outer side of the lower push rod rotating housing 252 and is used to block the end of the rotating shaft.

Further, as shown in FIGS. 7-8 , the first rotary joint 25 further includes a spring mounting seat 256 , a pushing spring 257 and a restoring member 258 , the pushing spring 257 is mounted on the spring mounting seat 256 , and the spring mounting seat 256 includes a The insertion arm 2561 extending from the gear 254 is provided with a slot 2543 on the gear 254 , and the insertion arm 2561 is inserted into the slot 2543 .

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

When the upper locking member 253 is disengaged upward, the pressing spring 257 stretches and pushes the reset member 258 to move toward the gear 254 in the axial direction, and the second ramp 2582 pushes the first ramp 2542 to move in the axial direction, so that the gear 254 moves toward the first gear groove 2511 , and come out from the second gear groove 2521 to realize the unlocking of the first rotating joint 25 .

After unlocking, the upper push rod 21 drives the upper push rod to rotate the housing 251, the gear 254, the spring mounting seat 256, the pushing spring 257 and the reset piece 258 to rotate backward and downward together. Unlocking of the second rotary joint 26 .

The unlocking trigger mechanism 27 drives the first rotating joint 25 to unlock through the upper wire, and the first rotating joint 25 drives the second rotating joint 26 to unlock through the lower wire. The two-stage unlocking method 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 rotating joint 25 and the second rotating joint 26 are not unlocked at the same time, and the user must first rotate the upper push rod 21 to unlock the second rotating joint 26 and rotate the lower push rod 22 . The order of folding is unique, and it is convenient for users to operate in sequence according to the set folding order. If the first rotating joint 25 and the second rotating joint 26 are unlocked at the same time, the user may not know whether to fold the upper push rod 21 or the lower push rod 22 first.

Second rotary joint:

As shown in FIGS. 9-15 , the second rotating joint 26 includes a lower wire 261 and a lower locking member 262 . After the upper push rod 21 is rotated, the lower wire 261 pulls the lower locking member 262 to unlock the second rotating joint 26 .

Further, the second rotating joint 26 also includes a lower push rod rotating member 263, a front support rotating member 264 and a rear support rotating 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 and the front support rotating member 264 are rotatably connected through a first rotating shaft 266;

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

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

A lower locking groove 268 is defined on the lower push rod rotating member 263 , the front support rotating member 264 and the rear support rotating member 265 . The lower locking member 262 is inserted into the lower locking groove 268 , and the second rotating 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 pass the first rotating shaft. 266 is rotatably connected to realize the relative rotation of the lower push rod 22 and the front bracket 23 .

As shown in FIGS. 14-15 , the rear support rotating member 265 is in the shape of a wrench, inserted into the front support rotating member 264 and rotatably connected through the second rotating shaft 267 to realize the relative rotation of the front support 23 and the rear support 24 .

As shown in FIGS. 10-12 , the second rotating joint 26 further includes a rear fork 2651 , and the rear fork 2651 clamps the installed lower push rod rotation member 263 , the front bracket rotation member 264 and the rear bracket rotation member 265 therein. , and is rotatably connected through the second shaft 267 .

As shown in FIGS. 10-11 , the second rotating joint 26 further includes a front fork member 2641, and the front fork member 2641 connects the installed lower push rod rotating member 263, the front support rotating member 264, the rear support rotating member 265 and the rear fork member. 2651 is clamped therein and is rotatably connected with the first rotating shaft 266 and the second rotating shaft 267 . The outer side surface of the front fork 2641 is covered with a lower cover plate 269, which plays an aesthetic role by shielding the internal installation structure.

In addition to the front fork member 2641 , the lower push rod rotating member 263 , the front support rotating member 264 , the rear support rotating member 265 and the rear fork member 2651 are all provided with lower locking grooves 268 . The lower locking groove 268 on the lower push rod rotating member 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 up along the long groove and is released 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 to realize the second rotating joint 26 unlocked.

As shown in FIG. 13 , the lower wire 261 is sleeved with a return spring 2611 , and when the lower wire 261 is pulled upward, the return spring 2611 is compressed. When the pulling force of the lower wire 261 is released, the return spring 2611 pushes the lower locking piece 262 downward, and the lower locking piece 262 is reinserted into the lower locking groove 268 .

The lower pivot joint 26 in this embodiment can not only realize folding and retracting, but also provide sufficient support for the front bracket 23 , the rear bracket 24 and the lower push rod 22 to increase the stability of the baby stroller frame in the unfolded state.

The folding process is as follows:

As shown in FIG. 1 , when the baby stroller frame 20 is folded, first press the button 271, and then rotate the cylindrical tube formed by the upper semicircular shell 272 and the lower semicircular shell 274 forward to unlock the first rotating joint 25;

After unlocking, flip the upper push rod 21 backwards and downwards, fold the upper push rod 21 to the rear side of the lower push rod 22, and after the upper push rod 21 is folded, unlock the second rotating joint 26;

Then turn the lower push rod 22 forward and downward, and the lower push rod 22 is turned downward together with the upper push rod 21 to be close to the front bracket 23;

Finally, lift the baby stroller frame 20, the rear bracket 24 and the front bracket 23 will naturally move closer under the action of gravity, and the entire baby stroller frame 20 can be retracted.

By implementing this embodiment, the rapid folding of the stroller frame can be facilitated, and the folded volume is smaller. Since the upper push rod 21 and the lower push rod 22 divide the push rod into two sections, the folded volume can be reduced, which is convenient for storage. In addition, the unlocking of the second rotating joint 26 is realized by the folding of the upper push rod 21 , which facilitates the step-by-step operation during folding, and is simple and easy to understand.

17-29 are schematic diagrams of the structure of the seat frame assembly in Embodiment 1 of the present invention.

A seat frame assembly 10 for a stroller includes a backrest 11, a seat 12, a switch unit 14, and a backrest pivot joint 13 connecting the backrest and the seat, and the switch unit 14 is mounted on the backrest 11;

When folded, after the switch unit 14 is operated, 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 unfolding, the backrest portion 11 is rotated, and after the backrest portion 11 is rotated and unfolded relative to the seat portion 12 in place, the backrest rotating joint 13 locks the backrest portion 11 .

FIG. 17 shows the unfolded state of the seat frame assembly 10. When it needs to be folded, the switch unit 14 is operated, and the switch unit 14 drives the backrest rotating joint 13 to unlock;

Then, the backrest portion 11 is turned in a direction approaching the seat portion 12 until the backrest portion 11 is turned to a horizontal position almost equal to the seat portion 12 .

When the seat frame assembly 10 needs to be unfolded again, the backrest 11 is rotated in a direction away from the seat portion 12 until it is adjusted to an appropriate deployment angle, the backrest pivot joint 13 is locked again, and the backrest 11 cannot be rotated relative to the seat portion 12 .

In this embodiment, after the backrest rotating joint 13 is unlocked, the backrest 11 is rotated and folded relative to the seat portion 12 to realize the operation of independent folding and folding of the seat frame assembly 10, and can be folded or unfolded independently relative to the stroller frame. Easy to adjust, suitable for different usage states and needs.

Further, the backrest portion 11 includes 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 on the top of the U-shaped rod.

Specifically, the backrest 11 is a complete U-shaped rod. When unfolded, the U-shaped rod is installed upside down, and the two ends are respectively connected with the backrest rotating joint 13. the highest point of time.

When the stroller is actually in use, the U-shaped bar jacket is provided with a back cloth, or back plate, to support the baby's back.

The unfolding angle of the backrest portion 11 is not limited to the angle shown in FIG. 2 , and the backrest portion 11 may continue to be turned backward away from the seat portion 12 until it is completely flat, which is convenient for the baby to lie down.

Optionally, the backrest portion 11 can also be of other structures, for example, a backrest plate is used to replace the U-shaped rod.

Further, as shown in FIGS. 18-19 , the switch unit 14 includes a flipping piece 141 , a mounting piece 142 and a steel wire 143 , the mounting piece 142 is fastened on the top of the U-shaped rod, the flipping piece 141 is rotatably connected with the mounting piece 142 , and the steel wire 143 One end is connected with the turning piece 141, and the other end is connected with 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 rotating joint 13 to unlock.

As shown in FIG. 18 , the turning member 141 is provided with a first wire hole 1411 toward the front side of the seat frame assembly 10 , one end of the two wires 143 is respectively fixed in the two first wire holes 1411 , and then the wire 142 is installed through the The piece 142 enters into the U-shaped rod, passes through the end of the U-shaped rod, and is connected with the backrest rotating joint 13 .

During operation, the user pushes the turning member 141 backward from the back of the seat frame assembly 10 , the upper end of the turning member 141 is hinged with the mounting member 142 , and the lower portion of the turning member 141 is turned backward (the right side in FIG. 4 ), driving the One end of the wire 143 is pulled backward, and the other end of the wire 143 pulls the backrest rotating joint 13 to drive the backrest rotating joint 13 to unlock.

Further, as shown in FIG. 18 and FIG. 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 penetrates the first through hole 1421, the second through hole 142 in turn, and the second through hole 111. The hole 111 and the U-shaped rod are connected with the backrest rotation joint 13 .

Further, as shown in FIGS. 17 and 18-20 , the backrest rotating joint 13 includes a first casing 131, a second casing 132, a rotating shaft 133, a locking pin 134 and a locking groove 135;

The first casing 131 is connected to the backrest portion 11, the second casing 132 is connected to the seat portion 12, the rotating shaft 133 is connected to the first casing 131 and the second casing 132, and the first casing 131 can rotate around the rotating shaft 133, The locking pin 134 is connected with the switch unit 14 and is installed between the first casing 131 and the second casing 132, and the locking groove 135 is formed on the second casing 132;

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

When unlocking, the switch unit 14 drives the locking pin 134 out of the locking groove 135 .

Specifically, as shown in FIG. 17 , the first casing 131 and the second casing 132 are both disc-shaped, and the first casing 131 and the second casing 132 form an installation cavity after being buckled, and the locking pin 134 and the locking pin 134 The grooves 135 are all installed in the installation cavity.

There are two backrest pivot joints 13, which are located on the left and right sides of the backrest portion 11 and the seat portion 12 respectively. , the switch unit 14 becomes a whole and rotates together.

The two second shells 132 are integrally connected with the seat portion 12 . During actual processing, the second shells 132 and the seat plate 121 of the seat portion 12 can be integrally injection-molded.

A plurality of hollows are formed on the seat plate 121 , and the seat plate 121 can be covered with a seat pad to increase comfort. The hollow part can increase the air permeability of the seat plate 121, and can also reduce the weight and cost. It also provides sufficient support and stability.

As shown in FIG. 23 , the locking grooves 135 include four, which are distributed with equal radii around the center of the second housing 132 . The plurality of locking grooves 135 are convenient for adjusting the angle between the backrest portion 11 and the seat portion 12 , and the locking pin 134 can be snapped into any locking groove 135 to meet different needs of users. The user can adjust the backrest 11 to a lying state, a half-lying state, and a sitting state.

Further, as shown in FIGS. 21-23 , the backrest rotating joint 13 further includes a sliding groove shell 136, a sliding member 137 and a pawl plate 138. The sliding groove shell 136 is connected between the backrest portion 11 and the second shell 132, and slides The latch 137 is connected to the switch unit 14 and can slide along the sliding groove shell 136. The claw plate 138 is mounted on the second housing 132. The plurality of clamping grooves 1381 on the claw plate 138 correspond to the locking grooves 135. One end is mounted on the sliding member 137 , and the other end is inserted into the locking groove 1381 and the locking groove 135 .

Specifically, the sliding groove shell 136 is fixedly connected to the end of the U-shaped rod. A semicircular groove is formed on 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 sliding member 137 is driven to slide upward.

The sliding member 137 also includes a pin hole 1372. The locking pin 134 is inserted into the pin hole 1372 and is fixedly connected. When the sliding member 137 slides upward, it drives the locking pin 134 to slide upward together, and the locking pin 134 comes out of the locking groove 135 to realize the backrest rotation Unlocking of joint 13.

The claw plate 138 is provided with four clamping grooves 1381 that completely match the shape of the locking groove 135 , and the claw 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 , and a limiting groove 1361 is defined on the sliding groove shell 136 . When the sliding member 137 slides upward, the limiting groove 1361 acts as a limiter.

The sliding member 137 is also connected with a restoring member. When the user releases the flipping member 141 , the restoring member makes the sliding member 137 slide down along the sliding groove shell 136 , keeping the locking pin 134 locked into the locking groove 1381 and the locking groove 135 . The return member may be a return spring.

In this embodiment, the sliding member 137 , the sliding groove shell 136 , and the locking pin 134 are integrally connected with the first housing 131 , and the claw plate 138 and the locking groove 135 are integrally connected with the second housing 132 . The two parts are locked by the cooperation of the locking pin 134 with the locking groove 135 and the locking groove 1381. When the locking pin 134 comes out of the locking groove 135 and the locking groove 1381, the unlocking is realized, and the backrest part 11 can rotate relative to the seat part 12. It is possible to adjust the angle of the backrest portion 11 or to fully fold it.

Further, as shown in FIG. 17 and FIGS. 14-25 , the seat frame assembly 10 further includes a handle bar 15 and a handle bar rotating joint 16 ;

The handrail rotating joint 16 includes a push piece 161 , a link piece 162 , a locking piece 163 and a connecting piece 164 . The pushing piece 161 is installed in the first housing 131 and rotates with the first housing 131 , and the locking piece 163 is embedded in the connecting piece 164 Center and lock the connecting piece 164, the connecting piece 164 is fixedly connected with the handrail 15;

When the pushing member 161 rotates toward the linking member 162, the linking member 162 is pushed to move in a straight line, the linking member 162 drives the locking member 163 to disengage from the connecting member 164, and the handrail 15 and the connecting member 164 can be rotated and folded.

Specifically, a part of the linkage member 162 is installed between the first casing 131 and the second casing 132 , and another part is installed on the inner side of the seat plate 121 , which is shielded by the shielding plate 124 .

The control of the armrest rotating joint 16 by the backrest rotating joint 13 can be realized through the linkage 162. When the backrest rotating joint 13 is unlocked and the backrest 11 is rotated toward the seat portion 12, the armrest rotating joint 16 is driven to unlock, so that the armrest 15 can move toward the seat portion 12. Fold down.

As shown in FIG. 21 , the second casing 132 is provided with a guide groove 1321 , and the linkage 162 moves linearly along the guide groove 1321 .

As shown in FIG. 24 , the locking member 163 is a gear structure with four straight teeth. One of the teeth of the locking member 163 is inserted into the linking member 162 . When the linking member 162 moves linearly, the locking member 163 is driven from the connecting member 164 . come out.

The remaining three teeth of the locking piece 163 are inserted into the insertion grooves (not shown) of the connecting piece 164. When the three straight teeth are inserted, the locking piece 163 locks the handrail 15, and the handrail 15 cannot be rotated. When the linking member 162 disengages the locking member 163 from the insertion groove, the handrail 15 can be rotated and folded.

Since the locking piece 163 has four straight teeth, which are evenly spaced, the corresponding insertion groove also has four tooth grooves. When the armrest bar 15 is rotated, the included angle with the seat portion 12 can be adjusted.

As shown in FIG. 21 , the outer side of the seat plate 121 is provided with a mounting slot 125 corresponding to the shape of the locking piece 163 , wherein the lowermost tooth slot of the mounting slot 125 is opened, and a straight tooth of the locking piece 163 can pass through and be linked with Piece 162 functions. When the locking piece 163 is disengaged from the connecting piece 164 , the locking piece 163 is inserted into the installation groove 125 .

Further, as shown in FIG. 25 , the pusher 161 includes an arc bar 1611 and a push block 1612 .

As shown in FIG. 25 , the linkage 162 includes a contact portion 1621 and an inclined groove 1622. The push block 1612 contacts the contact portion 1621 and pushes the linkage 162 to move. A straight tooth of the locking member 163 is snapped into the inclined groove 1622, and the linkage When 162 moves, the chute 1622 pushes the locking piece 163 out of the connecting piece 164 .

Specifically, when the first housing 131 rotates clockwise in the direction of the arrow in FIG. 9 , the pushing block 1612 pushes the contact portion 1621 to move to the right,

From the orientation of FIG. 25 , the linkage member 162 moves to the left, and the oblique groove 1622 drives the locking member 163 to move outward along its own axial direction, and comes out from the insertion groove of the connecting member 164 .

There is also a reset member (not shown in the figure) at the linkage member 162. When the first housing 131 is unfolded, it rotates in the opposite direction, the pushing block 1612 is separated from the contact portion 1621, and the linkage member 162 is reset under the action of the reset member. The right side of 10 moves, the chute 1622 pushes the locking piece 163 back into the insertion slot, and locks with the connecting piece 164 again. 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 embedding groove 1211, and the corresponding extension rod 122 is provided with an embedding block (not shown), and the embedding block is embedded in the into the embedding groove 1211 to realize the connection between the extension rod 122 and the seat plate 121 .

Optionally, the extension rod 122 can adjust the angle relative to the seat plate 121; when the baby is sitting, the extension rod 122 is turned downward, so that the baby's calf can naturally bend downward; when the baby is lying down, the extension rod 122 is turned upward , which is kept on 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 also installed on the seat portion 11 , and the ceiling unit 17 includes two ceiling rods 171 and a ceiling rotating joint 172 . The ceiling rods 171 are used to support the tarpaulin, and the ceiling pivot joints 172 are used to adjust the angle between the two ceiling rods 171 to facilitate unfolding or folding of the tarpaulin. The ceiling pivot joint 172 is mounted on the two side bars of the U-shaped rod of the backrest portion 11 and rotates together with the backrest portion 11 . In this embodiment, when the seat frame assembly 10 needs to be folded, as shown in FIG. 12 , the flipper 141 of the switch unit 14 is moved backward, and the switch unit 14 drives the backrest rotation joint 13 to unlock;

Then, push the backrest part 11 to turn down, and in the process of pushing the backrest part 11 , unlock the armrest rotating joint 16 , and then push the armrest bar 15 to turn down together. until the armrest 15 and the backrest 11 are fully folded.

As shown in Figures 28-29, the ceiling rod 171 can be flipped up and folded.

As shown in FIGS. 27 and 29 , the rear side of the seat plate 121 is provided with a handle hole 1212 . After the seat frame assembly 10 is completely folded, after the user’s hand is inserted into the handle hole 1212 , the entire stroller or the stroller can be moved. The entire seat frame assembly 10 lifts up for easy handling.

By implementing this embodiment, the angle adjustment and complete folding of the backrest portion 11 relative to the seat portion 12 can be realized, and the angle adjustment and complete folding of the armrest bar 15 relative to the seat portion 12 can also be realized. The flexibility of adjustment is increased to meet the different needs of users.

As shown in Figures 30-32, it is a schematic diagram of the structure of the baby stroller in the first embodiment.

The baby stroller includes a baby stroller frame 20, the baby stroller frame 20 includes a push rod 21, a front bracket 22, a rear bracket 23 and wheels 24, and also includes a seat frame assembly 10, which is mounted on the baby stroller frame. 20 on.

The baby stroller frame 20 further includes a frame rotation joint 26, and the front bracket 22, the rear bracket 23 and the push rod 21 are connected through the frame rotation joint 26, and can be rotated and folded. The folding operations of the stroller frame 20 and the seat frame assembly 10 are two completely independent modes of operation.

When the entire stroller needs to be folded, the seat frame assembly 10 is folded first, and then the stroller frame 20 is folded.

Further, as shown in FIGS. 31-32 , the front bracket 22 is connected with the seat portion 12 , the rear bracket 23 is connected with the backrest rotating joint 13 , and the backrest rotating joint 13 and the push rod 21 are connected by a 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 , the second housing 132 of the backrest pivoting joint 13 is provided with a second connecting column 1322 , and the rear bracket 23 is rotatably connected to the backrest pivoting joint 13 through the second connecting column 1322 .

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

When the baby stroller frame 20 is unfolded, the first connecting column 123 , the second connecting column 1322 and the connecting rod 25 play the role of three-point positioning for the seat frame assembly 10 . The relative positions of other components remain unchanged.

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

By implementing this embodiment, the seat frame assembly 10 can be positioned, and the seat frame assembly 10 and the stroller frame 20 can be folded and retracted independently, which increases the flexibility of adjustment and meets different needs of users.

Embodiment 2:

As shown in Figures 33-35, it is a schematic diagram of the structure of the baby stroller in the second embodiment.

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

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

Further, as shown in FIG. 17 , the baby stroller frame 20 further includes a first connecting rod 28 , one end of the first connecting rod 28 is rotatably connected with the lower push rod 22 , and the other end is rotatably connected with the backrest of the seat frame assembly 10 . 13 connections.

Further, as shown in FIG. 35 , the baby 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 with the other end of the first connecting rod 28, and the second connecting rod 29b The other end of the connecting rod 29a is rotatably connected with one end of the third connecting rod 29b, and the other end of the third connecting rod 29b is fixedly connected with the armrest bar 15 of the seat frame assembly 10 .

The first connecting rod 28 , the second connecting rod 29 a and the third connecting rod 29 b serve to support and connect the seat frame assembly 10 . As shown in FIG. 33, when the stroller is unfolded, the seat frame assembly 10 can be held in a stable state. As shown in FIG. 34 , when the stroller is folded, the seat frame assembly 10 can be received in the stroller frame 20 .

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 usage requirements.

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

By implementing this embodiment, the baby stroller can be quickly and conveniently folded. In addition, the seat frame assembly 10 and the baby stroller frame 20 can be folded and retracted independently, which increases the flexibility of adjustment and meets the different needs of users.

Embodiment 4:

As shown in Figure 36, the method of folding a stroller includes the following steps:

S101: operate the switch unit 14 to unlock the backrest rotating joint 13;

S102: Turn the backrest part 11 forward and downward, so that the backrest part 11 is close to the seat part 12;

S103: operate the unlocking trigger mechanism 27 to unlock the first rotating joint 25;

Further, when the unlocking trigger mechanism 27 is operated,

First press the button 271 of the unlocking trigger mechanism 27;

The unlocking trigger mechanism 27 is then rotated forward.

S104: Turn the upper push rod 21 backward and downward to approach the lower push rod 22;

S105: the second rotating joint 26 is unlocked, and the lower push rod 22 is turned forward and downward to approach the front bracket 23;

S106: Lift the handle hole 1212 on the seat frame assembly 10, and the front bracket 23 and the rear bracket 24 are naturally folded under the action of gravity.

By implementing this embodiment, the first rotating joint is unlocked by operating the unlocking trigger mechanism, the upper push rod is turned backward and downward to unlock the second rotating joint, then the lower push rod is turned forward and downward, and finally the rear bracket and the front When the bracket is folded, the present invention is convenient to operate and fold the car, and the folded volume can be smaller, which is convenient for storage;

In addition, the seat frame assembly can be independently folded and folded, and can be folded or unfolded independently relative to the stroller frame, which is convenient for adjustment and is suitable for different use states and needs.

What has been described above is only the principles and preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, on the basis of the principle of the present invention, several other modifications can also be made, which should also be regarded as the protection scope of the present invention.

Claims (14)

Claims 1. A stroller comprising a seat frame assembly (10) and a stroller frame (20), characterized in that the seat frame assembly (10) is capable of being relative to the stroller frame (20) independent folding; The baby 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), and a second rotating joint (26). ) and an unlocking trigger mechanism (27), the unlocking trigger mechanism (27) is mounted on the upper push rod (21), the lower end of the upper push rod (21) and the upper end of the lower push rod (22) are connected by the first rotating joint (25), the lower end of the lower push rod (22) is connected with the upper end of the front bracket (23) and the rear bracket (24) through the second rotating joint ( 26) Connection, the unlocking trigger mechanism (27) is used to trigger the unlocking of the first rotating joint (25), and after rotating the push-down rod (22), the second rotating joint (26) is triggered to unlock. 2. The stroller according to claim 1, wherein the unlocking trigger mechanism (27) comprises a button (271), and the unlocking trigger mechanism (27) is used to unlock itself after pressing the button (271), and drive the first rotating joint (25) to unlock by rotating; 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 into a cylindrical tube, a part of the key (271) protrudes from the lower semicircular shell (274), and the key (271) is installed on the Between the lower semicircular shell (274) and the spring, the telescopic piece (273) is connected with the upper semicircular shell (272), and upper steel wires are respectively connected to both ends of the telescopic piece (273); After the button (271) is pressed, the unlocking trigger mechanism (27) is unlocked, and the button (271), the upper semicircular shell (272) and the lower semicircular shell (274) are rotated to compress the telescopic The telescopic element (273) pulls the upper steel wire to drive the first rotating joint (25) to unlock. 3. The stroller according to claim 2, wherein the upper push rod (21) comprises an inner tube (211) and an outer tube (212), and the cylindrical tube is sleeved on the inner tube (212). 211) outside; The unlocking trigger mechanism (27) further comprises a sleeve (275), the sleeve (275) is fixedly connected with the outer pipe (212), and the two ends of the cylindrical pipe are respectively inserted into the sleeve (275) ) and can be rotated, the sleeve (275) is provided with a locking groove (2751), the two ends of the button (271) extend out of the locking blocks (2711), and the locking blocks (2711) are inserted into into the locking groove (2751), when the button (271) is pressed, the locking block (2711) comes out of the locking groove (2751), and the cylindrical tube can be relative to the sleeve Tube (275) turns. 4. The stroller according to 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 first connecting member (2733) and a second connecting member (2732). Two telescopic rods (2734), the first connecting piece (2731) is connected with one end of the first telescopic rod (2733), and the second connecting piece (2732) is connected with the end of the second telescopic rod (2734) One end is connected, the other end of the first telescopic rod (2733) is connected with the other end of the second telescopic rod (2734), the first connecting piece (2731) and the second connecting piece (2732) are respectively A piece of the upper steel wire is connected, and both the first connecting piece (2731) and the second connecting piece (2732) are provided with slope bosses (2735); Two ramp grooves (2721) are formed in the upper semicircular shell (272), and the ramp bosses (2735) are embedded in the ramp grooves (2721). When the upper semicircular shell (272) rotates, the The ramp groove (2721) pushes the two ramp bosses (2735) to drive the first telescopic rod (2733) and the second telescopic rod (2734) to retract toward each other. 5 . The stroller according to claim 1 , wherein the first rotating joint ( 25 ) comprises an upper push rod rotating casing ( 251 ), a lower push rod rotating casing ( 252 ) and an upper locking piece. 6 . (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 The upper locking member (253) is connected with the unlocking trigger mechanism (27) through the upper wire, and the first rotating joint (25) is unlocked when the upper wire pulls the upper locking member (253); the first rotation The joint (25) also includes a gear (254), a first gear slot (2511) is provided in the upper push rod rotating housing (251), and a second gear is provided in the lower push rod rotating housing (252) slot(2521), When the first rotating joint (25) is locked, the gear (254) is embedded in 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 rotating joint (25) is unlocked . 6 . The stroller according to claim 1 , wherein the second rotating joint ( 26 ) comprises a lower wire ( 261 ) and a lower locking piece ( 262 ), and the upper push rod ( 21 ) is rotated after the upper push rod ( 21 ) is rotated. , the lower wire (261) pulls the lower locking piece (262) to unlock the second rotating joint (26); the second rotating joint (26) includes a lower push rod rotating piece (263), a front bracket a turning piece (264) and a rear bracket turning piece (265); The lower push rod rotating member (263) is connected with the lower end of the lower push rod (22), and a first rotating shaft ( 266) rotatable connection; The front support rotating member (264) is connected with the upper end of the front support (23), and the front support rotating member (264) and the rear support rotating member (265) are rotatably connected through a second rotating shaft (267). ; The rear bracket rotating member (265) is connected with the upper end of the rear bracket (24); The lower push rod rotating member (263), the front support rotating member (264) and the rear support rotating member (265) are all provided with a lower locking groove (268), and the lower locking member (262) is inserted into the In the lower locking groove (268), the second rotating joint (26) is locked. 7. The stroller according to any one of claims 1-6, wherein the seat frame assembly (10) comprises a backrest portion (11), a seat portion (12), a switch unit (14) and a backrest pivot joint (13), the backrest pivot joint (13) connects the backrest portion (11) and the seat portion (12), and the switch unit (14) is mounted on the backrest portion (11); When folded, after the switch unit (14) is operated, the switch unit (14) drives the backrest rotating joint (13) to unlock, so that the backrest portion (11) can rotate relative to the seat portion (12) Collapse; When unfolding, the backrest part (11) is rotated, and after the backrest part (11) is rotated and unfolded relative to the seat part (12), the backrest rotation joint (13) locks the backrest part (11) . 8. The stroller according to claim 7, characterized in that the backrest portion (11) comprises a hollow U-shaped rod, and two ends of the U-shaped rod are pivotally connected to the two backrests (13). ) connection, the switch unit (14) is mounted on the top of the U-shaped rod; The switch unit (14) includes a flipping piece (141), a mounting piece (142) and a steel wire (143), the mounting piece (142) is fastened on the top of the U-shaped rod, and the flipping piece (141) rotatably connected with the mounting piece (142), one end of the steel wire (143) is connected with the turning piece (141), and the other end is connected with the backrest rotating joint (13); When the turning member (141) is rotated, the turning member (141) pulls the steel wire (143), and the steel wire (143) drives the backrest rotation joint (13) to unlock. 9 . The stroller according to claim 8 , wherein a first through hole ( 1421 ) is formed on the mounting member ( 142 ), and a second through hole ( 111 ) is formed on the U-shaped rod. 10 . , the steel wire passes through the first through hole (1421), the second through hole (111) and the U-shaped rod in sequence and is connected with the backrest rotating joint (13). 10. The stroller according to claim 1, wherein the backrest rotation joint comprises a first shell (131), a second shell (132), a rotating shaft (133), and a locking pin (134) and locking slot (135); The first shell (131) is connected with the backrest portion (11), the second shell (132) is connected with the seat portion (12), and the rotating shaft (133) is connected with the first A casing (131) and the second casing (132), the first casing (131) can be rotated around the rotation axis, and the locking pin (134) is connected with the switch unit (14) and installed between the first casing (131) and the second casing (132), the locking groove (135) is formed on the second casing (132); When locked, the locking pin (134) is inserted into the locking groove (135); When unlocking, the switch unit (14) drives the locking pin (134) to escape from the locking groove (135). 11. The stroller according to claim 10, characterized in that, the backrest rotating joint (13) further comprises a sliding groove shell (136), a sliding member (137) and a pawl plate (138), the sliding A groove shell (136) is connected between the backrest portion (11) and the second housing (132), and the sliding member (137) is connected with the switch unit (14) and can move along the sliding groove The casing (136) slides, the claw plate (138) is mounted on the second casing (132), and the plurality of clamping grooves (1381) on the claw plate (138) are connected to the locking grooves ( 135) Correspondingly, one end of the locking pin (134) is mounted on the sliding member (137), and the other end is inserted into the locking groove (138) and the locking groove (135). 12. The stroller according to claim 10, wherein the seat frame assembly (10) further comprises a handle bar (15) and a handle bar pivot joint (16); The handrail pivot joint (16) includes a pusher (161), a linkage (162), a lock (163) and a connection (164), and the pusher (161) is mounted on the first housing (161). 131) and rotate with the first housing (131), the locking piece (163) is embedded in the connecting piece (164) and locks the connecting piece (164), the connecting piece (164) ) is fixedly connected with the handrail (15); When the pushing member (161) rotates toward the linking member (162), the linking member (162) is pushed to move in a straight line, and the linking member (162) drives the locking member (163) from the connecting member (162). 164), the handrail (15) and the connecting piece (164) can be rotated and folded. 13. The stroller according to claim 12, characterized in that, the pushing member (161) comprises an arc-shaped strip (1611) and a pushing block (1612), and the arc-shaped strip (1611) is defined by the first The rotation center of a casing (131) is the center of the circle, and the push block (1612) is located at one end of the arc strip (1611); The linkage (162) includes a contact portion (1621) and a chute (1622), the push block (1612) contacts the contact portion (1621) and pushes the linkage (162) to move, the locking At least a part of the piece (163) is snapped into the chute (1622), and when the linkage piece (162) moves, the chute (1622) pushes the locking piece (163) from the connecting piece (1622). 164). 14. A stroller folding method for the stroller according to any one of claims 1-13, characterized in that, comprising the steps of: Operate the switch unit (14) to unlock the backrest pivot joint (13); Turn the backrest part (11) forward and downward so that the backrest part (11) is close to the seat part (12); operating the unlocking trigger mechanism to unlock the first rotating joint; Turn the upper push rod backward and downward to be close to the lower push rod; The second rotating joint is unlocked, and the lower push rod is turned forward and downward to approach the front bracket; Lift the handle hole on the seat frame assembly, and the front bracket and the rear bracket are folded.

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