CN110667679A - Seat frame assembly, stroller and method of folding the same - Google Patents

Abstract

The invention discloses a seat frame assembly for a baby stroller, comprising a backrest, a seat, a switch unit and a backrest rotating joint connecting the backrest and the seat, and the switch unit is mounted on the backrest when folded, after operating the switch unit, the switch unit drives the backrest rotation joint to unlock, so that the backrest can be rotated and folded relative to the seat; After the backrest portion is rotated and unfolded relative to the seat portion, the backrest rotation joint locks the backrest portion. The invention also discloses a method for folding a baby stroller, a seat frame assembly and a method for folding a baby stroller frame. In the present invention, after the backrest rotating joint is unlocked, the backrest is rotated and folded relative to the seat portion, so as to realize the operation of independent folding and folding of the seat frame assembly, and can be folded or unfolded independently relative to the baby stroller frame, which is convenient for adjustment and is suitable for different usage status and needs.

Description

Seat frame assembly, stroller and method of folding the same

technical field

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

Background technique

As shown in FIG. 1 , the existing baby stroller frame usually includes a push rod 1 ′, a front bracket 2 ′, a rear bracket 3 ′, a handrail 4 ′, a seat frame 5 ′, wheels 6 ′ and a rotating joint 7 ′. The rod 1' is connected with the front bracket 2' through the rotating joint 7', the armrest bar 4' is fixedly connected with the front bracket 2', the rear bracket 3' is movably connected with the front bracket 2', and the seat frame 5' is connected with the front bracket 2' and the rear bracket 2'. The bracket 3' is movably connected. When the car is retracted, the rotating joint 7' is unlocked, the push rod 1' is flipped and folded forward relative to the front bracket 2', the rear bracket 3' is folded towards the direction close to the front bracket 2', and the rear end of the seat frame 5' is rotated downwards and folded. Fold toward the front bracket 2'.

There is no seat frame assembly that can be folded and folded independently on the existing baby stroller frame. 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 seat frame assembly for a baby stroller, a baby stroller, a folding method of the seat frame assembly and a baby stroller folding method that can be independently folded, folded and adjusted.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a seat frame assembly for a baby stroller that can be folded, folded and adjusted independently, a baby stroller, a method for folding the seat frame assembly, and a method for folding the baby stroller .

The present invention provides a seat frame assembly for a baby stroller, comprising a backrest, a seat, a switch unit and a backrest pivot joint connecting the backrest and the seat, the switch unit being mounted on the backrest ;

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, the backrest part comprises a hollow U-shaped rod, two ends of the U-shaped rod are connected with the two backrest rotation joints, and the switch unit is mounted on the top of the U-shaped rod.

Further, the switch unit includes a flipping piece, a mounting piece and a steel wire, the mounting piece is fastened on the top of the U-shaped rod, the flipping piece is rotatably connected with the mounting piece, and one end of the steel wire is connected to the the turning piece is connected, and the other end is connected with the backrest rotating joint;

When the turning member is rotated, the turning member pulls the steel wire, and the steel wire drives the backrest rotating joint to unlock.

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 pivot joint.

Further, the backrest rotating 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.

Further, 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, the When the linkage member moves, the chute pushes the locking member to disengage from the connecting member.

The present invention also provides a baby stroller, including a baby stroller frame, the baby stroller frame including a push rod, a front bracket, a rear bracket and a wheel, and the seat frame assembly according to any one of the above, the The seat frame assembly is mounted on the stroller frame.

Further, the front bracket is connected with the seat portion, the rear bracket is connected with the backrest rotation joint, and the backrest rotation joint and the push rod are connected by a connecting rod.

The present invention also provides a seat frame assembly folding method of any one of the above seat frame assemblies, comprising the following steps:

operate the switch unit to unlock the backrest rotation joint;

Flip the backrest forward and downward, bringing the backrest closer to the seat portion.

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

When the backrest portion is turned forward and downward, the armrest bar rotation joint is unlocked, and the armrest bar is driven to rotate forward and downward to approach the seat portion.

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;

Fold the stroller frame.

Further, the step of folding the stroller frame further includes:

Turn the push rod forward and downward, and the push rod approaches the front bracket;

The front bracket is close to the rear bracket.

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

In the present invention, after the backrest rotating joint is unlocked, the backrest is rotated and folded relative to the seat portion, so as to realize the operation of independent folding and folding of the seat frame assembly, and can be folded or unfolded independently relative to the baby stroller frame, which is convenient for adjustment and is suitable for different usage status 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:

1 is a perspective view of a conventional baby stroller frame;

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

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

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

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

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

7 is an exploded view of one side of the seat frame assembly at the backrest pivot joint in Embodiment 1 of the present invention;

8 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. 9 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;

10 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;

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

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

Fig. 13 is a side view of the seat frame assembly in the folded state in the first embodiment of the present invention;

Fig. 14 is a perspective view of the folded state of the seat frame assembly in the first embodiment of the present invention;

15 is a perspective view of a baby stroller in Embodiment 2 of the present invention;

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

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

18 is a flowchart of a method for folding a seat frame assembly in Embodiment 3 of the present invention;

19 is a flow chart of a method for folding a baby stroller in Embodiment 4 of the present invention.

Reference number comparison table:

Push rod 1', front bracket 2', rear bracket 3', grab bar 4', seat frame 5', wheels 6', rotating joint 7';

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 : push rod 21 , front bracket 22 , rear bracket 23 , wheels 24 , connecting rod 25 , frame rotation joint 26 .

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.

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

Example 1:

2-14 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. 2 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. 3-4 , 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. 3 , 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. 3 and FIG. 5 , 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 and the second through hole in sequence. The hole 111 and the U-shaped rod are connected with the backrest rotation joint 13 .

Further, as shown in FIG. 2 and FIGS. 6-8 , 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. 2 , 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 fastened together. The locking pin 134 and the locking 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. 7 , 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. 6-8 , the backrest rotating joint 13 further includes a sliding groove shell 136 , a sliding member 137 and a claw 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. 8 , 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. 2 and FIGS. 9-10 , 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. 6 , the second housing 132 is provided with a guide groove 1321 , and the linkage 162 moves linearly along the guide groove 1321 .

As shown in FIG. 9 , 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 interlocking 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. 6 , 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 link 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. 9 , the pusher 161 includes an arc bar 1611 and a push block 1612 .

As shown in FIG. 10 , 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. 10 , 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 is released 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. 11 , 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. 12 , a ceiling unit 17 is also mounted 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 13-14, the ceiling rod 171 can be flipped up and folded.

As shown in FIGS. 12 and 14 , 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.

Embodiment 2:

As shown in Figures 15-17, it is a schematic structural diagram of the baby stroller frame in the second embodiment of the present invention.

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. 16-17 , the front bracket 22 is connected with the seat portion 12 , the rear bracket 23 is connected with the backrest pivot joint 13 , and the backrest pivot joint 13 and the push rod 21 are connected by a connecting rod 25 .

Specifically, as shown in FIG. 16 , 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. 17 , a second connecting column 1322 is provided on the second housing 132 of the backrest rotating joint 13 , and the rear bracket 23 is rotatably connected to the backrest rotating 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 three:

As shown in Figure 18, the method of folding the seat frame assembly includes the following steps:

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

S102 : Turn the backrest portion 11 forward and downward to make the backrest portion 11 approach the seat portion 12 .

Further, the seat frame assembly 10 further includes a handle bar 15 and a handle bar rotating joint 16;

S103 : when the backrest portion 11 is turned forward and downward, unlock the armrest bar 15 to rotate the joint, and drive the armrest bar 15 to rotate forward and downward to approach the seat portion 12 .

By implementing this embodiment, the seat frame assembly can be folded, the backrest portion 11 can be turned to approach the seat portion 12 , and the armrest 15 can be turned downward to approach the seat portion 12 . The seat frame can be independently adjusted and folded, which increases the flexibility of adjustment and meets the different needs of users.

Embodiment 4:

As shown in Figure 19, the method of folding a stroller includes the following steps:

S201: operate the switch unit 14 to unlock the backrest rotating joint 13;

S202: Turn the backrest part 11 forward and downward, so that the backrest part 11 is close to the seat part 12;

Fold the stroller frame 20.

Further, the step of folding the stroller frame further includes:

S203: Flip the push rod 21 forward and downward, and the push rod 21 approaches the front bracket 22;

S204: The front bracket 22 and the rear bracket 23 are close together.

By implementing this embodiment, the seat frame assembly is folded first, and then the baby stroller frame is folded, and the seat frame assembly 10 and the baby stroller frame 20 are folded and retracted independently, which increases the flexibility of adjustment and satisfies the user's needs. different 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 (15)

1. A seat frame assembly (10) for a baby stroller, characterized in that it comprises a backrest portion (11), a seat portion (12), a switch unit (14) and a connection between the backrest portion (11) and the the backrest pivot joint (13) of the seat part (12), the switch unit (14) is mounted on the backrest part (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) . 2. The seat frame assembly (10) according to claim 1, wherein the backrest portion (11) comprises a hollow U-shaped rod, two ends of the U-shaped rod are connected to two of the backrests A rotary joint (13) is connected, and the switch unit (14) is mounted on the top of the U-shaped rod. 3. The seat frame assembly (10) according to claim 2, wherein the switch unit (14) comprises a flip (141), a mount (142) and a wire (143), the mount (143) (142) is fastened on the top of the U-shaped rod, the turning piece (141) is rotatably connected with the mounting piece (142), and one end of the wire (143) is connected with the turning piece (141), 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 (143), and the wire (143) drives the backrest rotation joint (13) to unlock. 4. The seat frame assembly according to claim 3, 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 ), 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 to the backrest rotating joint (13). 5. The seat frame assembly (10) according to claim 1, wherein the backrest rotation joint comprises a first housing (131), a second housing (132), a rotation shaft (133), 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). 6. The seat frame assembly according to claim 5, wherein the backrest pivot joint (13) further comprises a sliding groove shell (136), a sliding member (137) and a pawl plate (138), the A sliding 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 slide along the The groove shell (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). 7. The seat frame assembly (10) according to claim 5, characterized in that the seat frame assembly (10) further comprises a grab bar (15) and a grab 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. 8. The seat frame assembly (10) according to claim 7, wherein the pusher (161) comprises an arc strip (1611) and a push block (1612), the arc strip (1611) Taking the rotation center of the first housing (131) as the center of the circle, the push block (1612) is located at one end of the arc bar (1611). 9. The seat frame assembly (10) according to claim 8, wherein the linkage (162) comprises a contact portion (1621) and an inclined groove (1622), and the push block (1612) is connected to the The contact portion (1621) contacts and pushes the linkage member (162) to move, and at least a part of the locking member (163) is snapped into the chute (1622), when the linkage member (162) moves, The chute (1622) pushes the locking piece (163) to disengage from the connecting piece (164). 10. A stroller, comprising a stroller frame (20), the stroller frame (20) comprising a push rod (21), a front bracket (22), a rear bracket (23) and a wheel (24), Characterized in that it further comprises the seat frame assembly (10) according to any one of claims 1-9, the seat frame assembly (10) being mounted on the baby stroller frame (20). 11. The stroller according to claim 11, wherein the front bracket (22) is connected with the seat portion (12), and the rear bracket (23) is connected with the backrest pivot joint (13) Connection, the backrest rotating joint (13) and the push rod (21) are connected through a connecting rod (25). 12. A seat frame assembly folding method for the seat frame assembly according to any one of claims 1-9, characterized in that, comprising the following steps: Operate the switch unit (14) to unlock the backrest pivot joint (13); The backrest portion (11) is turned forward and downward so that the backrest portion (11) is approached to the seat portion (12). 13. The method for folding a seat frame assembly according to claim 12, wherein the seat frame assembly (10) further comprises a handle bar (15) and a handle bar rotation joint (16); When the backrest portion (11) is turned forward and downward, the armrest bar rotation joint (16) is unlocked, and the armrest bar (15) is driven to rotate forward and downward to approach the seat portion (12). 14. A stroller folding method for the stroller of claim 10 or 11, 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); Fold the stroller frame (20). 15. The method of folding a stroller according to claim 14, wherein the step of folding the stroller frame further comprises: Turn the push rod (21) forward and downward, and the push rod (21) approaches the front bracket (22); The front bracket (22) is close to the rear bracket (23).

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