CN110667683A - 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 first back, a second back, a seat, a switch unit, and an upper rotating joint connecting the first back and the second back , and a lower pivot joint connected between the second back and the seat, the switch unit is mounted on the cross beam between the first back and the second back, the cross beam and the upper pivot articulated, the switch unit can unlock the upper pivot joint and the lower pivot joint. 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 upper rotating joint and the lower rotating joint are unlocked, the first back and the second back are rotated and folded relative to the seat part, so as to realize the operation of independent folding and folding of the seat frame assembly, and can be folded independently relative to the baby stroller frame Or unfolded for easy adjustment and suitable for different usage states 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 first back, a second back, a seat portion, a switch unit, and an upper rotating joint connecting the first back and the second back, and a lower pivot joint connected between the second back and the seat, the switch unit is mounted on a beam between the first back and the second back, the beam and the upper pivot joint connected, the switch unit can unlock the upper pivot joint and the lower pivot joint.

further,

When folded, after the switch unit is operated, the switch unit drives the upper pivot joint and the lower pivot joint to unlock, so that the first back can be rotated and folded relative to the second back, and the second The back can be rotatably folded relative to the seat part;

When unfolding, the first back is rotated, and after the first back is rotated and unfolded relative to the second back, the upper pivot joint locks the first back, and the second back is relative to the seat After the back portion is rotated and deployed in place, the lower pivot joint locks the second back portion.

Further, the first back includes a hollow U-shaped rod, and two ends of the U-shaped rod are connected with the two upper rotating joints.

Further, the switch unit includes a turning piece, a return spring and a steel wire, the turning piece is rotatably connected to the beam, the restoring spring is installed between the turning piece and the beam, and one end of the steel wire is is connected with the turning piece, and the other end is connected with the upper rotating joint and the lower rotating joint;

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

Further, the steel wire includes a first steel wire and a second steel wire, the first steel wire is connected with the upper rotating joint, and the second steel wire is connected with the lower rotating joint.

Further, the lower 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 second back, 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 second casing. The housing is rotatable about the rotation axis, the locking pin is connected to the switch unit and is installed between the first housing and the second housing, and the locking groove is formed in the second housing on the body;

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 lower rotating joint also includes a sliding groove shell, a sliding member and a claw plate, the sliding groove shell is connected between the second back and the second shell, and the sliding groove shell is connected to the The switch unit is connected, one end of the locking pin is fixed on the sliding member, and the other end passes through the limiting groove of the sliding groove shell and can slide along the sliding groove shell, and the claw plate is installed On the second housing, a plurality of locking grooves on the claw plate correspond to the locking grooves, and the other end of the locking pin is inserted into the locking groove and the locking groove after passing through the sliding groove shell in the slot.

Further, the upper rotating joint includes a first rotating member, a second rotating member and a cam, the first rotating member is connected with the first back, and the second rotating member is connected with the second back, so the first rotating member is rotatably connected with the second rotating member;

When the upper rotating joint is locked, the cam is located between the first rotating member and the second rotating member along the axis direction;

The switch unit can drive the cam to disengage from the first rotating member or the second rotating member along the axis direction, and the upper rotating joint is unlocked.

Further, the seat frame assembly further includes a ceiling unit, the ceiling unit includes a ceiling rod and a ceiling rod rotating member, the ceiling rod rotating member is rotatably connected with the first rotating member, and is connected with the ceiling rod Fixed connection.

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, a wheel and a handrail, and the seat frame assembly according to any one of the above , the seat frame assembly is mounted on the stroller frame.

Further, the front bracket is rotatably connected to the seat portion, the lower pivot joint and the push rod are rotatably connected through a first connecting rod, and the handrail is rotatably connected to the seat portion, A second connecting rod extends from the handrail, and the second connecting rod is rotatably connected to the first connecting rod through a third connecting rod.

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

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

Turn the first back forward and downward so that the first back is close to the second back;

The second back is turned forward and downward so that the second back is close to the seat portion.

The present invention also provides a baby stroller folding method for the baby stroller, comprising the following steps:

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

Turn the first back forward and downward so that the first back is close to the second back;

Turn the second back forward and downward so that the second back is close to the seat portion;

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 upper rotating joint and the lower rotating joint are unlocked, the first back and the second back are rotated and folded relative to the seat part, so as to realize the operation of independent folding and folding of the seat frame assembly, and can be folded independently relative to the baby stroller frame Or unfolded for easy adjustment and suitable for different usage 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:

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

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

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

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

5 is a perspective view of the switch unit of the seat frame assembly in Embodiment 1 of the present invention after omitting the flipping member;

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

7 is an exploded view of the lower pivot joint of the seat frame assembly in the first embodiment of the present invention;

FIG. 8 is a schematic structural diagram of the lower pivot joint of the seat frame assembly in a modification of the first embodiment of the present invention;

9 is an exploded view of a side surface at the lower pivot joint of the seat frame assembly in a modification of the first embodiment of the present invention;

Fig. 10 is an exploded view of the other side of the lower pivot joint of the seat frame assembly in the modification of the first embodiment of the present invention;

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

12 is an exploded view of one side of the upper pivot joint of the seat frame assembly in the first embodiment of the present invention;

13 is an exploded view of the other side of the upper pivot joint of the seat frame assembly in the first embodiment of the present invention;

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

Figure 15 is a partial enlarged view of the baby stroller in the second embodiment of the present invention;

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

FIG. 17 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 first back 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;

Lower rotating joint 13: first casing 131, second casing 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 third wire hole 1362, the second wire hole 1371, the pin hole 1372, the limit block 1373, the card slot 1381;

The switch unit 14: the turning element 141, the return spring 142, the steel wire 143, the first steel wire hole 1411, the first hinge part 1412, the first steel wire 143a, the second steel wire 143b;

Cross beam 16: second hinge part 161;

Ceiling unit 17: ceiling rod 171, ceiling rotating member 172, roof cloth 173;

second back 18;

Upper rotating joint 19: first rotating member 191, second rotating member 192, cam 193, cam groove 1921, sliding shaft 1922, fourth wire hole 1931;

Baby stroller frame 20 : push rod 21 , front support 22 , rear support 23 , wheels 24 , first connecting rod 25 , frame rotating joint 26 , handrail 27 , second connecting rod 28 , and third connecting rod 29 .

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 for a stroller, including a first back 11, a second back 18, a seat portion 12, a switch unit 14, an upper pivot joint 19 connecting the first back 11 and the second back 18, and a connection On the lower pivot joint 13 between the second back 18 and the seat portion 12, the switch unit 14 is mounted on the beam 16 between the first back 11 and the second back 18, the beam 16 is connected with the upper pivot joint 19, and the switch unit 14 The upper pivot joint 19 and the lower pivot joint 13 can be unlocked.

When folded, after the switch unit 14 is operated, the switch unit 14 drives the upper pivot joint 19 and the lower pivot joint 13 to unlock, so that the first back 11 can be rotated and folded relative to the second back 18 , and the second back 18 can be relative to the seat portion 12 . turn and close;

When unfolding, rotate the first back 11. After the first back 11 is rotated and unfolded relative to the second back 18, the upper pivot joint 19 locks the first back 11. After the second back 18 is rotated and unfolded relative to the seat portion 12, the lower The pivot joint 13 locks the second back 18 .

When it needs to be folded, the switch unit 14 is operated, and the switch unit 14 drives the upper rotating joint 19 and the lower rotating joint 13 to unlock;

Then, turn the first back 11 toward the direction close to the second back 18 until the rotation of the first back 11 and the second back 18 are almost parallel to each other;

Then, the first back 11 and the second back 18 are rotated together toward the direction close to the seat portion 12 until the first back 11 and the second back 18 are rotated to a horizontal position similar to the seat portion 12 .

When the seat frame assembly 10 needs to be unfolded again, first turn the first back 11 and the second back 18 away from the seat portion 12 until the proper unfolding angle is adjusted, and the lower turning joint 13 is locked again; A back 11 is turned upward relative to the second back 18 until the first back 11 and the second back 18 are on the same line, and the upper rotating joint 19 is locked again.

In this embodiment, after the upper rotating joint 19 and the lower rotating joint 13 are unlocked, the first back 11 and the second back 18 are rotated and folded relative to the seat portion 12 to realize the independent folding and folding operation of the seat frame assembly. The cart frame can be folded or unfolded separately for easy adjustment and is suitable for different usage states and needs.

Wherein, as shown in FIG. 2 , the first back 11 includes a hollow U-shaped rod, and the two ends of the U-shaped rod are connected with two upper rotating joints 19 .

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

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.

Optionally, the first back 11 can also be of other structures, for example, a U-shaped bar is replaced by a backboard, which can support the baby's head.

Further, as shown in FIG. 2 , the second back 18 is two straight rods, which are respectively connected to both ends of the U-shaped first back 11 . The first back 11 and the second back 18 are connected by an upper pivot joint 19 , the two upper pivot joints 19 are connected by a beam 16 , and the switch unit 14 is mounted on the beam 16 .

Further, as shown in FIGS. 3-5 , the switch unit 14 includes an inversion member 141, a return spring 142 and a steel wire 143, the inversion member 141 is rotatably connected to the beam 16, and the return spring 142 is installed between the inversion member 141 and the beam 16, One end of the steel wire 143 is connected with the turning piece 141, and the other end is connected with the upper rotating joint 19 and the lower rotating joint 13;

When the turning member 141 is rotated, the turning member 141 pulls the wire 143, and the wire 143 drives the upper rotating joint 19 and the lower rotating joint 13 to unlock.

Specifically, as shown in FIGS. 4-5 , the turning member 141 includes a first wire hole 1411 and a first hinge portion 1412 , the first wire hole 1411 is fixedly connected to one end of the wire 143 , and the first hinge portion 1412 is connected to the first hinge portion 1412 on the beam 16 . The two hinge parts 161 are rotatably connected. One end of the return spring 142 is connected to the turning member 141 , and the other end is connected to the beam 16 .

When the flipping member 141 is flipped toward the rear of the seat frame assembly 10, the flipping member 141 rotates around the first hinge portion 1412 and pulls the wire 143, and the wire 143 drives the upper rotating joint 19 and the lower rotating joint 13 to unlock. When the flipping member 141 is flipped over , stretch the return spring 142 . When the flipping member 141 is released, the return spring 142 drives the flipping member 141 to return to the initial position.

Further, as shown in FIG. 5 , the steel wire 143 includes a first steel wire 143 a and a second steel wire 143 b , the first steel wire 143 a is connected with the upper rotating joint 19 , and the second steel wire 143 b is connected with the lower rotating joint 13 .

There are two first wire holes 1411 of the turning member 141, each of which is connected to a general wire 143, and a general wire 143 is divided into two strands, which are the first wire 143a and the second wire 143b respectively. The first wire 143a and the The upper rotating joint 19 is connected, and the second wire 143b is connected with the lower rotating joint 13 . When the turning member 141 is turned over, it can simultaneously drive the upper rotating joint 19 and the lower rotating joint 13 to unlock.

Optionally, there may be only one steel wire 143, and the first steel wire holes 1411 of the flipping member 141 are respectively connected with a steel wire 143, and each steel wire 143 simultaneously drives the upper rotating joint 19 and the lower rotating joint 13 to unlock.

Further, as shown in FIG. 2 and FIGS. 6-7 , the lower rotating joint 13 includes a first housing 131 , a second housing 132 , a rotating shaft 133 , a locking pin 134 and a locking groove 135 ;

The first casing 131 is connected to the second back 18 , 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 lower pivot joints 13, which are located on the left and right sides of the second back 18 and the seat portion 12 respectively. The back 18 and the switch unit 14 become a whole and rotate 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.

The locking grooves 135 include three, which are distributed around the center of the second housing 132 with equal radii. The plurality of locking grooves 135 are convenient for adjusting the angle between the second back 18 and the seat portion 12 , and the locking pin 134 can be snapped into any one of the locking grooves 135 to meet different needs of users. The user can adjust the second back 18 and the first back 11 to a lying state, a semi-lying state, and a sitting state.

Further, as shown in FIGS. 6-7 , the lower rotating joint 13 further includes a sliding groove shell 136 , a sliding member 137 and a claw plate 138 , and the sliding groove shell 136 is connected between the second back 18 and the second shell 132 , The sliding groove shell 136 includes a third wire hole 1362 , and the other end of the second wire 143b is fixedly connected to the third wire hole 1362 . The third steel wire hole 1362 of the sliding groove shell 136 is connected to the switch unit 14 through the second steel wire 143b, one end of the locking pin 134 is fixed on the sliding member 137, and the other end passes through the limit groove 1361 of the sliding groove shell 136 and can slide along the The groove shell 136 slides, the claw plate 138 is installed on the second housing 132 , the claw plate 138 is provided with three clamping grooves 1381 that completely match the shape of the locking groove 135 , and a plurality of clamping grooves 1381 on the claw plate 138 Corresponding to the locking groove 135 , the other end of the locking pin 134 is inserted into the locking groove 1381 and the locking groove 135 after passing through the sliding groove shell 136 .

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

When the second wire 143b is pulled, it drives the sliding groove shell 136 to move upward.

When the sliding groove shell 136 is pulled upward, the locking pin 134 is driven to slide upward, the locking pin 134 drives the sliding member 137 to slide upward, and the locking pin 134 comes out of the locking groove 135 to realize the unlocking of the lower rotating joint 13 .

The claw plate 138 is connected with the second housing 132 by screws.

The sliding groove shell 136 is also connected with a reset member. When the user releases the flipping member 141 , the reset member moves the sliding groove shell 136 downward, 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 locking pin 134, the cooperation with the locking groove 135 and the locking groove 1381, and when the locking pin 134 comes out of the locking groove 135 and the locking groove 1381, the unlocking is realized, and the second back 18 can be relative to the seat part 12. Rotating, it is possible to adjust the angle of the second back 18 or to fold it completely.

Optionally, as shown in FIGS. 8-10 , it is a schematic structural diagram of the lower rotating joint 13 in the modification.

The lower 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 second back 18 , 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 and FIG. 8 , 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 Both 134 and locking slot 135 are installed in the mounting cavity.

There are two lower pivot joints 13, which are located on the left and right sides of the second back 18 and the seat portion 12 respectively. The back 18 and the switch unit 14 become a whole and rotate 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. 9 , 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 second back 18 and the seat portion 12 , and the locking pin 134 can be snapped into any one of the locking grooves 135 to meet different needs of users. The user can adjust the second back 18 to a lying state, a semi-lying state, and a sitting state.

Further, as shown in FIGS. 8-10 , the lower rotating joint 13 further includes a sliding groove shell 136 , a sliding member 137 and a claw plate 138 , and the sliding groove shell 136 is connected between the second back 18 and the second shell 132 , The sliding member 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 , and the locking pin 134 One end is installed on the slider 137 , and the other end is inserted into the card slot 1381 and the locking slot 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 second wire 143b is fixedly connected to the second wire hole 1371 . When the second wire 143b is pulled, the sliding member 137 is driven to slide upward.

The sliding member 137 also includes a pin hole 1372, and 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 is released from the locking groove 135 to realize downward 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. 10 , 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 plays a limiting role.

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 the modified example, 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 , the locking groove 135 and the second housing 132 are integrally connected. The two parts are locked through the cooperation of the locking pin 134 , the locking groove 135 and the card groove 1381 . When the locking pin 134 comes out of the locking groove 135 and the card groove 1381 , the unlocking is realized, and the second back 18 can rotate relative to the seat portion 12 . , the angle of the second back 18 can be adjusted or fully folded.

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 Figures 12-13, the upper rotating joint 19 includes a first rotating member 191, a second rotating member 192 and a cam 193, the first rotating member 191 is connected with the first back 11, and the second rotating member 192 is connected with the first rotating member 192. The two backs 18 are connected, and the first rotating member 191 and the second rotating member 192 are rotatably connected;

When the upper rotating joint 19 is locked, the cam 193 is located between the first rotating member 191 and the second rotating member 192 along the axis direction;

The switch unit 14 can drive the cam 193 to disengage from the first rotating member 191 or the second rotating member 192 along the axis direction, and the upper rotating joint 19 is unlocked.

Specifically, as shown in FIG. 12 , the cam 193 includes a fourth wire hole 1931, and the fourth wire hole 1931 is connected to the first wire 143a. The second rotating member 192 is provided with a cam groove 1921. The cam 193 is at least partially embedded in the cam groove 1921. The second rotating member 192 further includes a sliding shaft 1922. The cam 193 is sleeved on the sliding shaft 1922 and can slide along the sliding shaft 1922. Shaft 1922 moves axially. The first rotating member 191 is rotatably connected with the sliding shaft 1922 , and the cam 193 can at least partially be embedded in the first rotating member 191 .

In the locked state, a part of the cam 193 is embedded in the cam groove 1921 of the second rotating member 192 , and the other part is embedded in the first rotating member 191 to lock the first rotating member 191 and the second rotating member 192 . At this time, the first back 11 and the second back 18 are locked.

When the turning member 141 is turned over, the first wire 143a pulls the cam 193 so that the cam 193 completely enters the cam groove 1921 and is disengaged from the first rotating member 191 . The first rotating member 191 can rotate relative to the second rotating member 192 to realize the rotation of the first back portion 11 relative to the second back portion 18 .

A reset member can be installed between the cam 193 and the cam groove 1921, and when the cam 193 is pulled toward the cam groove 1921, the reset member is compressed. When the first wire 143a does not exert force on the cam 193, the cam 193 moves away from the second rotating member 192 again under the action of the reset member, and is partially inserted into the first rotating member 191, so that the first rotating member 191 and the first rotating member 191 are connected with each other. Locking between the second rotating members 192 .

Wherein, as shown in FIG. 2 , a ceiling unit 17 is also installed on the seat portion 11 , and the ceiling unit 17 includes a ceiling rod 171 , a ceiling rotating member 172 and a tent cloth 173 .

Further, as shown in FIGS. 12-13 , a ceiling rotating member 172 is also installed on the outer side of the first rotating member 191 . The ceiling rotating member 172 is rotatably connected to the first rotating member 191 and is fixedly connected to the ceiling rod 171 .

The two ceiling rods 171 are used to support the tent cloth 173 , and one side of the tent cloth 173 is fixed on the first back 11 . The ceiling rotating member 172 is used to adjust the included angle between the ceiling rod 171 and the first back portion 11 to facilitate unfolding or folding of the awning. When the ceiling rotating member 172 is rotated, the ceiling rod 171 can be driven to be turned upward and folded.

Further, as shown in FIG. 7 , 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 folding of the first back 11 relative to the second back 18 and the angle adjustment and folding of the second back 18 relative to the seat portion 12 can be realized, which increases the flexibility of adjustment and can meet the different needs of users .

Embodiment 2:

Referring to Figures 14-15, it is a schematic structural diagram of a baby stroller frame in Embodiment 2 of the present invention.

The stroller includes a stroller frame 20, which includes a push rod 21, a front bracket 22, a rear bracket 23, wheels 24, and a grab bar 27, and a seat frame assembly 10 mounted on a on the stroller frame 20.

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. 14-15 , the front bracket 22 is rotatably connected to the seat portion 12 , the lower pivot joint 13 and the push rod 21 are rotatably connected through the first connecting rod 25 , and the armrest 27 and the seat portion 12 are rotatably connected. Rotationally connected, the handrail 27 extends out of a second connecting rod 28 , and the second connecting rod 28 is rotatably connected to the first connecting rod 25 through a third connecting rod 29 .

Specifically, as shown in FIG. 15 , 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 .

The seat frame assembly 10 is positioned at three points through the first connecting post 123 , the connecting point between the armrest bar 27 and the seat portion 12 , and the connecting point between the third connecting rod 29 and the first connecting rod 25 and the lower pivot joint 13 . .

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 16, the method of folding the seat frame assembly includes the following steps:

S101: operate the switch unit 14 to unlock the upper pivot joint 19 and the lower pivot joint 13;

S102: Turn the first back 11 forward and downward to make the first back 11 approach the second back 18;

S103 : Turn the second back 18 forward and downward to make the second back 18 approach the seat portion 12 .

By implementing this embodiment, the seat frame assembly can be folded, the first back 11 can be folded relative to the second back 18, the second back 18 can be turned over toward the seat portion 12, and the seat frame can be independently adjusted and folded, increasing the adjustment flexibility to meet the different needs of users.

Embodiment 4:

As shown in Figure 17, the method of folding a stroller includes the following steps:

S201: operate the switch unit 14 to unlock the upper pivot joint 19 and the lower pivot joint 13;

S202: Turn the first back 11 forward and downward to make the first back 11 approach the second back 18;

S203: Turn the second back 18 forward and downward to make the second back 18 approach the seat portion 12;

Fold the stroller frame 20.

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

S204: Flip the push rod 21 forward and downward, and the push rod 21 approaches the front bracket 22;

S205: 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 (14)

1. A seat frame assembly (10) for a stroller, characterized in that it comprises a first back (11), a second back (18), a seat portion (12), a switch unit (14), connected An upper pivot joint (19) between the first back (11) and the second back (18), and a lower pivot joint connected between the second back (18) and the seat portion (12) (13), the switch unit (14) is mounted on a beam (16) between the first back (11) and the second back (18), and the beam (16) rotates with the upper The joint (19) is connected, and the switch unit (14) can unlock the upper rotation joint (19) and the lower rotation joint (13). 2. The seat frame assembly (10) of claim 1, wherein When folded, after the switch unit (14) is operated, the switch unit (14) drives the upper rotation joint (19) and the lower rotation joint (13) to unlock, so that the first back (11) can be unlocked The second back (18) can be rotated and folded relative to the seat portion (12) relative to the second back (18); When unfolding, the first back (11) is rotated, and after the first back (11) is rotated and unfolded relative to the second back (18), the upper rotating joint (19) will move the first back (11) Locking, after the second back portion (18) is rotated and unfolded relative to the seat portion (12), the lower pivot joint (13) locks the second back portion (18). 3. The seat frame assembly (10) according to claim 1, wherein the first back (11) comprises a hollow U-shaped rod, two ends of the U-shaped rod are connected to two of the The upper rotary joint (19) is connected. 4. The seat frame assembly (10) according to claim 1, wherein the switch unit (14) comprises a turning member (141), a return spring (142) and a wire (143), the turning member (143) (141) is rotatably connected with the beam (16), the return spring (142) is installed between the turning member (141) and the beam (16), and one end of the steel wire (143) is connected to the the turning piece (141) is connected, and the other end is connected with the upper rotating joint (19) and the lower 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 upper rotating joint (19) and the lower rotating joint (13) to unlock . 5. The seat frame assembly (10) according to claim 4, wherein the wire (143) comprises a first wire (143a) and a second wire (143b), the first wire (143a) Connected with the upper rotating joint (19), the second steel wire (143b) is connected with the lower rotating joint (13). 6. The seat frame assembly (10) according to claim 1, wherein the lower pivot joint (13) comprises a first housing (131), a second housing (132), a rotation shaft (133) ), locking pin (134) and locking groove (135); The first shell (131) is connected with the second back (18), 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 rotate around the rotating shaft (133), the locking pin (134) is connected to the switch unit ( 14) connected 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). 7. The seat frame assembly according to claim 6, wherein the lower pivot joint (13) further comprises a sliding groove shell (136), a sliding member (137) and a pawl plate (138), the A sliding groove casing (136) is connected between the second back (18) and the second casing (132), the sliding groove casing (136) is connected with the switch unit (14), and the locking One end of the pin (134) is fixed on the sliding member (137), and the other end passes through the limiting groove (1361) of the sliding groove shell (136) and can slide along the sliding groove shell (136) , the claw plate (138) is mounted on the second housing (132), and the plurality of clamping grooves (1381) on the claw plate (138) correspond to the locking grooves (135), so The other end of the locking pin (134) is inserted into the locking groove (138) and the locking groove (135) after passing through the sliding groove shell (136). 8. The seat frame assembly (10) according to claim 1, wherein the upper pivot joint (19) comprises a first pivot member (191), a second pivot member (192) and a cam (193) , the first rotating member (191) is connected with the first back (11), the second rotating member (192) is connected with the second back (18), and the first rotating member (191) rotatably connected with the second rotating member (192); When the upper rotating joint (19) is locked, the cam (193) is located between the first rotating member (191) and the second rotating member (192) along the axis direction; The switch unit (14) can drive the cam (193) to disengage from the first rotating member (191) or the second rotating member (192) along the axis direction, and the upper rotating joint (19) is unlocked. 9. The seat frame assembly (10) of claim 8, wherein the seat frame assembly (10) further comprises a ceiling unit (17) comprising ceiling bars (171) ) and a ceiling rod rotating member (172), the ceiling rod rotating member (172) is rotatably connected with the first rotating member (191), and is fixedly connected with the ceiling rod (171). 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), wheels (24) and The armrest (27) is characterized in that, further comprising 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) )superior. 11. The stroller according to claim 10, characterized in that the front bracket (22) is rotatably connected to the seat portion (12), and the lower pivot joint (13) is connected to the push rod (12). 21) are rotatably connected by a first connecting rod (25), the handrail (27) is rotatably connected with the seat portion (12), and the handrail (27) extends out of a second connecting rod (28). ), the second connecting rod (28) is rotatably connected with the first connecting rod (25) through a third connecting rod (29). 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 upper pivot joint (19) and the lower pivot joint (13); Turn the first back (11) forward and downward so that the first back (11) approaches the second back (18); The second back (18) is turned forward and downward so that the second back (18) approaches the seat portion (12). 13. 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 upper pivot joint (19) and the lower pivot joint (13); Turn the first back (11) forward and downward so that the first back (11) approaches the second back (18); Turn the second back (18) forward and downward so that the second back (18) approaches the seat portion (12); Fold the stroller frame (20). 14. The method of folding a stroller according to claim 13, 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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