CN219109060U - Safety seat and safety seat - Google Patents

Abstract

The utility model relates to the technical field of safety seats and discloses a safety seat and a safety seat, wherein the safety seat comprises a seat cushion plate assembly, a backrest assembly, a front armrest assembly and an adjusting assembly, the backrest assembly comprises an upper backrest assembly and a lower backrest assembly, one end of the lower backrest assembly is hinged with the seat cushion plate assembly, and the other end of the lower backrest assembly is hinged with the upper backrest assembly; the front armrest assembly, the cushion plate assembly and the lower backrest assembly are hinged at the same position; the adjusting component is arranged on the backrest component and is used for controlling the backrest component to be locked and unlocked when the adjusting component is in a first adjusting gear so as to adjust the inclination angle of the backrest component; and when the adjusting assembly is in the second adjusting gear, the adjusting assembly is used for controlling the locking and unlocking of the front armrest assembly and the locking and unlocking of the upper backrest assembly and the lower backrest assembly so as to enable the front armrest assembly, the upper backrest assembly and the lower backrest assembly to be unfolded or folded. The backrest component of the safety seat can be unfolded and folded, and the whole volume is smaller during folding.

Description

Safety seat and safety seat

Technical Field

The utility model relates to the technical field of safety seats, in particular to a safety seat and a safety stump.

Background

At present, the foldable safe seat is deeply favored by parents, and the safe seat can be carried after being folded during traveling. The existing safety seat pocket can adjust the sitting posture and the lying posture by adjusting the backrest, but the occupied volume is relatively large after the seat pocket cannot be folded or folded, so that the folding volume of the whole safety seat can be influenced by the safety seat pocket, and in addition, the handrails attached to the existing baby carriage seat pocket cannot be folded together, so that the whole baby carriage is large after being folded, and is inconvenient to carry.

Disclosure of Invention

The utility model aims to provide a safety seat and a safety seat, which solve the technical problem that the existing safety seat is large in volume after being folded.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a safe seat stump, comprising:

a cushion plate assembly;

the backrest assembly comprises an upper backrest assembly and a lower backrest assembly, one end of the lower backrest assembly is hinged with the cushion plate assembly, and the other end of the lower backrest assembly is hinged with the upper backrest assembly;

the front armrest assembly, the cushion plate assembly and the lower backrest assembly are hinged at the same position; and

The adjusting assembly is arranged on the backrest assembly and is provided with a first adjusting gear and a second adjusting gear, and the adjusting assembly is used for controlling the backrest assembly to be locked and unlocked when being positioned in the first adjusting gear so as to adjust the inclination angle of the backrest assembly; and the adjusting component is used for controlling the locking and unlocking of the front armrest component and the locking and unlocking of the upper backrest component and the lower backrest component when being in the second adjusting gear so as to enable the front armrest component, the upper backrest component and the lower backrest component to be unfolded or folded.

The safety seat can control the rotation adjustment of the backrest component through the adjusting component, and the locking and unlocking of the front armrest component and the unlocking and locking of the upper backrest component and the lower backrest component are convenient to operate; and the upper backrest component and the lower backrest component can be unfolded and folded, so that the volume of the safety seat is reduced in the folded state.

As a preferred scheme of the safety seat, the cushion plate assembly comprises a cushion plate fixing piece, a sliding rail is arranged on the cushion plate fixing piece, the sliding rail comprises an unlocking rail and locking grooves and unlocking grooves, the locking grooves are arranged on two sides of the unlocking rail and are communicated with the unlocking rail, the plurality of locking grooves are sequentially arranged along the extending direction of the unlocking rail, and the unlocking grooves are correspondingly arranged with the locking grooves at the top of each locking groove;

The lower backrest assembly comprises a lower backrest fixing member which is rotatably arranged on the cushion plate fixing member;

the front armrest assembly comprises a front armrest fixing piece which is rotatably arranged on one side of the lower backrest fixing piece, which is far away from the cushion plate fixing piece;

the lower backrest lower locking piece is arranged between the cushion plate fixing piece and the lower backrest fixing piece in a sliding manner, the lower backrest lower locking piece is connected with the adjusting component, a locking functional block is arranged on one side, facing the cushion plate fixing piece, of the lower backrest lower locking piece, the locking functional block stretches into the sliding track and can move in the sliding track, when the adjusting component is in a first adjusting gear, the lower backrest lower locking piece slides to a first unlocking position, the locking functional block moves into the unlocking track from the locking groove, the backrest component is unlocked, the lower backrest component can rotate relative to the cushion plate fixing piece, and the backrest component can be locked at a current angle when the locking functional block stretches into the corresponding locking groove;

when the adjusting assembly is in the second adjusting gear, the lower backrest lower locking member slides to a second unlocking position, and the locking functional block moves from the unlocking track to the unlocking groove.

Through the slip of locking piece under the lower back for the locking function block of locking piece moves in the slip track under the lower back, when the locking function block removes in the unblock track, back subassembly unblock can carry out the regulation of angle to the back subassembly, when the locking function block stretches into in the corresponding locking groove, the back subassembly lock is at current angle, so that use.

As a preferable scheme of the safety seat, a locking lug is arranged on one side of the lower backrest lower locking piece, which is far away from the cushion plate fixing piece, and a first inclined plane is arranged on the locking lug along the moving direction of the lower backrest lower locking piece;

a front armrest locking piece is arranged between the front armrest fixing piece and the lower backrest fixing piece, the front armrest locking piece can move relative to the front armrest fixing piece along the axial direction of the front armrest fixing piece, a locking hole is formed in the front armrest locking piece, a locking column is arranged on the cushion plate fixing piece, the locking column penetrates through the front armrest fixing piece and then stretches into the locking hole, and the front armrest locking piece moves along the axial direction of the front armrest fixing piece so that the locking column stretches into or stretches out of the locking hole;

The front armrest locking piece and the lower backrest fixing piece are arranged between the front armrest locking piece and the lower backrest fixing piece, the front armrest unlocking piece can move relative to the lower backrest fixing piece along the axial direction of the lower backrest fixing piece, a guide groove is formed in the front armrest unlocking piece, the extending direction of the guide groove is consistent with that of the locking protruding block, a second inclined surface is formed at the end part of the guide groove, the locking protruding block is arranged in the guide groove in a sliding mode, so that the lower backrest locking piece can be switched between an initial position, a first unlocking position and a second unlocking position, when the lower backrest locking piece slides from the first unlocking position to the second unlocking position, the first inclined surface is abutted to the second inclined surface, the front armrest unlocking piece and the front armrest locking piece are driven to move along the axial direction of the lower backrest fixing piece, the locking column is separated from the locking hole, and the front armrest assembly is unlocked.

The guide groove of the front armrest unlocking piece is matched with the inclined plane of the locking lug of the lower backrest locking piece so as to drive the front armrest unlocking piece and the front armrest locking piece to move along the axial direction of the lower backrest fixing piece, so that the locking column is separated from the locking hole, and the front armrest assembly is unlocked so as to perform unfolding or folding operation on the front armrest assembly.

As a preferable scheme of the safety seat, a first elastic reset piece is arranged between the front armrest locking piece and the front armrest fixing piece, and the first elastic reset piece is used for driving the front armrest locking piece to move along the axial direction of the front armrest fixing piece in a direction away from the front armrest fixing piece so as to enable the locking column to extend into the locking hole.

The first elastic reset piece can drive the front handrail locking piece to move along the axial direction of the front handrail fixing piece, so that the locking column stretches into the locking hole, and reset of the front handrail locking piece is realized.

As a preferable scheme of the safety seat, the lower backrest assembly comprises a lower backrest locking piece, wherein the lower backrest locking piece is provided with a first plug-in tooth socket, and the lower backrest locking piece is provided with an inclined plane protruding block arranged around the axial direction of the lower backrest locking piece;

the upper backrest assembly comprises an upper backrest fixing member, the upper backrest fixing member is rotatably arranged on one side of the lower backrest locking member, and a second inserting tooth socket is arranged on the upper backrest fixing member;

the upper backrest locking piece and the lower backrest locking piece are arranged between the upper backrest locking piece and the upper backrest fixing piece along the axial direction of the lower backrest locking piece, the upper backrest locking tooth and the lower backrest locking piece are in plug connection and match with the second plug-in tooth socket and are in selective plug connection and match with the first plug-in tooth socket, the upper backrest upper unlocking piece is arranged on the upper backrest locking tooth and the lower backrest locking piece in a penetrating manner and can be arranged in a rotating manner relative to the lower backrest locking piece, one side, facing the lower backrest locking piece, of the upper backrest upper unlocking piece is provided with an inclined plane groove arranged around the axial direction of the lower backrest locking piece, inclined plane protruding blocks are movably arranged in the inclined plane groove, the upper backrest upper unlocking piece is connected with the lower backrest lower locking piece through a transmission assembly, and when the lower backrest lower locking piece is moved to the second unlocking position, the transmission assembly drives the upper backrest unlocking piece to rotate around the axial direction of the upper backrest locking piece so that the inclined plane protruding blocks rotate in the inclined plane groove to drive the upper backrest locking tooth socket and the lower backrest locking piece to be kept in the first plug-in the plug-in tooth socket and the second backrest unlocking piece.

The upper backrest unlocking piece is rotated by pulling the lower backrest locking piece, so that the inclined surface groove on the upper backrest unlocking piece is matched with the inclined surface convex block of the lower backrest unlocking piece to drive the upper backrest unlocking tooth and the lower backrest unlocking tooth to deviate from the first plug-in tooth socket, and the upper backrest component and the lower backrest component are unlocked, so that the unfolding and folding operation of the backrest component can be realized.

As a preferable scheme of the safety seat, a second elastic reset piece is arranged between the upper backrest fixing piece and the upper backrest upper unlocking piece, and the second elastic reset piece is used for driving the upper backrest upper unlocking piece and the upper backrest and lower backrest locking teeth to reset.

The second elastic reset piece is used for driving the upper backrest upper unlocking piece and the upper backrest locking teeth and the lower backrest locking teeth to move towards the direction close to the first inserting tooth grooves, so that the upper backrest upper unlocking piece and the upper backrest locking teeth and the lower backrest locking teeth are reset.

As a preferred solution of the above safety seat, the transmission assembly comprises:

the fixed rotating piece is arranged in the lower backrest rod of the lower backrest assembly, a first traction rope is wound on the fixed rotating piece, and one end of the first traction rope is connected with the upper backrest unlocking piece;

The transmission structure is arranged in the lower backrest rod in a moving mode, one end of the transmission structure is in butt joint with the lower backrest lower locking piece, the other end of the transmission structure can be in butt joint with the fixed rotating piece and is connected with the other end of the first traction rope, and the transmission structure moves to stretch the first traction rope and drive the upper backrest upper unlocking piece to rotate.

The transmission assembly is matched with the transmission structure through the first traction rope on the fixed rotating piece in a pulling way, so that the rotation of the unlocking piece on the upper backrest is realized, the structure is simple, and the preparation is easy.

As a preferable scheme of the safety seat, a third elastic reset piece is arranged between the lower backrest lower locking piece and the transmission structure, and the third elastic reset piece is used for driving the lower backrest lower locking piece to reset;

a fourth elastic reset piece is arranged between the transmission structure and the lower backrest rod and used for driving the transmission structure to reset.

The third elastic reset piece can be used for driving the smooth reset of the lower backrest unlocking piece, and the fourth elastic reset piece can be used for driving the smooth reset of the transmission piece.

As a preferred embodiment of the safety seat, the adjusting assembly comprises:

one end of the adjusting fixing piece is arranged at the top end of the upper backrest assembly;

the adjusting spanner is rotatably arranged at the other end of the adjusting fixing piece, a stop block is arranged on the adjusting spanner, the free end of the adjusting spanner is connected with the lower backrest lower locking piece through a second traction rope in the upper backrest assembly, and the adjusting spanner rotates to enable the adjusting assembly to be in the first adjusting gear;

the secondary adjusting stop block is arranged in the adjusting fixing piece in a sliding mode and is switched between a first position and a second position, and when the secondary adjusting stop block is in the first position, the secondary adjusting stop block is abutted with the stop block; when the secondary adjusting stop block moves to the second position, the secondary adjusting stop block is separated from the stop block;

the secondary adjusting button is arranged on the adjusting fixing piece in a sliding mode and connected with the secondary adjusting stop block, and the secondary adjusting button is configured to drive the secondary adjusting stop block to move between the first position and the second position.

The adjusting component realizes the adjustment of two gears of the first adjusting gear and the second adjusting gear through the adjusting spanner and the secondary adjusting button.

The utility model also provides a safety seat, which comprises the safety seat.

The safety seat is simple in overall structure and small in folding occupied space due to the safety seat.

The utility model has the beneficial effects that:

the safety seat stump provided by the utility model can control the rotation adjustment of the backrest component through the adjusting component, and the locking and unlocking of the front armrest component and the unlocking and locking of the upper backrest component and the lower backrest component are convenient to operate; and the upper backrest component and the lower backrest component can be unfolded and folded, so that the volume of the safety seat is reduced in the folded state.

The safety seat provided by the utility model has the advantages that the whole structure is simple, and the folding occupied space is small through the safety seat.

Drawings

FIG. 1 is a schematic view of a first construction of a safety seat in the process of adjusting the angle of a backrest assembly according to the present utility model;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a second schematic view of the structure of the safety seat in the process of adjusting the angle of the backrest assembly;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a third schematic view of the structure of the safety seat in the process of adjusting the angle of the backrest assembly according to the present utility model;

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a schematic diagram of a fourth configuration of the safety seat in the process of adjusting the angle of the backrest assembly according to the present utility model;

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a schematic illustration of a folding construction of a canopy rod assembly of the safety seat stump of the present utility model;

FIG. 10 is a side view of FIG. 9;

FIG. 11 is a schematic view of a folding front armrest assembly of the safety seat stump provided by the present utility model;

FIG. 12 is a side view of FIG. 11;

FIG. 13 is a schematic view of a folding back assembly of the safety seat unit of the present utility model;

FIG. 14 is a side view of FIG. 13;

FIG. 15 is a schematic view of a folding foot pedal assembly of the safety seat of the present utility model;

FIG. 16 is a side view of FIG. 15;

FIG. 17 is an exploded view of a safety seat provided by the present utility model;

FIG. 18 is a view of the seat cushion plate assembly and the front armrest assembly of the safety seat cushion provided by the present utility model;

FIG. 19 is a schematic view of the structure of the lower back assembly of the safety seat unit of the present utility model;

FIG. 20 is a schematic view of the structure of the upper back assembly and the adjustment assembly of the safety seat unit provided by the present utility model;

FIG. 21 is a schematic view of the safety seat according to the present utility model showing the internal structure;

fig. 22 is a partial enlarged view at D in fig. 21;

FIG. 23 is a second schematic diagram of the safety seat according to the present utility model showing the internal structure;

FIG. 24 is an enlarged partial view at E in FIG. 23;

FIG. 25 is a third schematic view of the safety seat of the present utility model showing the internal structure;

fig. 26 is a partial enlarged view at F in fig. 25;

FIG. 27 is a side view of the seat cushion plate assembly and footrest assembly of the safety seat cushion provided by the present utility model;

FIG. 28 is a schematic view showing a structure in which a lower back lower lock is moved from a locking groove to an unlocking rail;

FIG. 29 is a schematic view showing a second structure of the lower back lower lock member of the present utility model moved from the locking groove to the unlocking rail;

FIG. 30 is a schematic view of a third configuration of the lower back lock of the present utility model from a locking slot to an unlocking track;

FIG. 31 is a schematic view showing the structure of the lower back lower lock member according to the present utility model from the lock groove to the unlock rail and then to the unlock groove;

FIG. 32 is a schematic view of the front armrest locking element provided by the present utility model without removal from the locking post;

FIG. 33 is a schematic view of the structure of the lower back down lock provided by the present utility model during movement;

FIG. 34 is a schematic view of the front armrest locking element of the present utility model disengaged from the locking post;

FIG. 35 is a schematic view of the structure of the lower back lower lock provided by the present utility model when the first incline of the lower back lower lock is not in contact with the second incline of the front armrest unlock;

FIG. 36 is a schematic view of the structure of the lower back lock of the present utility model when the first incline of the lower back lock is in direct contact with the second incline of the front armrest unlock;

FIG. 37 is a schematic view of the structure of the lower back lock of the present utility model when the first incline of the lower back lock abuts the second incline of the front armrest unlock;

fig. 38 is a schematic view of a structure of a wrench for moving an adjusting unit according to the present utility model:

fig. 39 is a schematic diagram of a structure of the adjusting assembly according to the present utility model for pushing the secondary adjusting button and moving the adjusting wrench.

In the figure:

10. an adjustment assembly; 101. adjusting a wrench; 1011. a stop block; 102. adjusting the fixing piece; 103. a second adjusting stop block; 104. a secondary adjustment button; 105. a fifth elastic restoring member;

20. an upper back assembly; 201. upper and lower back locking teeth; 202. an upper back rest fixing member; 2021. the second plug-in tooth socket; 203. a second traction rope; 204. an upper backrest bar; 205. a second elastic restoring member;

30. A lower back assembly; 301. a lower back lock; 3011. the first plug-in tooth socket; 3012. a beveled protrusion; 302. an unlocking piece is arranged on the upper backrest; 3021. an inclined surface groove; 303. fixing the rotating member; 304. a traction block; 3041. a first traction rope; 305. a lower back rest fixing member; 3051. an arc-shaped groove; 306. a transmission member; 306A, a lower transmission end face; 306B, the upper end face of the transmission; 307. a lower back lower lock; 307A, locking function block; 307B, locking tab; 307B1, a first bevel; 307C, locking the upper end face; 308. a lower back rest bar; 309. a third elastic restoring member; 310. a fourth elastic restoring member;

40. a cushion plate assembly; 40A, locking posts; 40B, sliding track; 40B1, unlocking the track; 40B2, locking groove; 40B3, unlocking slot; 401. a cushion plate fixing member;

50. a foot pedal assembly;

60. a front armrest assembly; 601. a front armrest mount; 602. a front armrest locking member; 602A, locking holes; 603. a front armrest unlocking member; 6031. a guide groove; 603A, a second bevel; 604. a first elastic restoring member;

70. and a canopy rod assembly.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

At present, the foldable safe seat is deeply favored by parents, and the safe seat can be carried after being folded during traveling. The existing safety seat pocket can adjust the sitting posture and the lying posture by adjusting the backrest, but the occupied volume is relatively large after the seat pocket cannot be folded or folded, so that the folding volume of the whole safety seat can be influenced by the safety seat pocket, and in addition, the handrails attached to the existing baby carriage seat pocket cannot be folded together, so that the whole baby carriage is large after being folded, and is inconvenient to carry.

In order to solve the above problems, as shown in fig. 1 to 16, the present embodiment provides a safety seat, which includes an adjusting assembly 10, a backrest assembly, a cushion plate assembly 40 and a front armrest assembly 60, wherein the backrest assembly includes an upper backrest assembly 20 and a lower backrest assembly 30, one end of the lower backrest assembly 30 is hinged with the cushion plate assembly 40, and the other end of the lower backrest assembly 30 is hinged with the upper backrest assembly 20; the front armrest assembly 60, the cushion plate assembly 40 and the lower back assembly 30 are hinged in the same position; the adjusting assembly 10 is arranged on the backrest assembly, the adjusting assembly 10 is provided with a first adjusting gear and a second adjusting gear, and the adjusting assembly 10 is used for controlling the backrest assembly to be locked and unlocked when being in the first adjusting gear so as to adjust the inclination angle of the backrest assembly; the adjustment assembly 10 is configured to control locking and unlocking of the front armrest assembly 60 and locking and unlocking of the upper and lower backrest assemblies 20, 30 to allow the front armrest assembly 60 and the upper and lower backrest assemblies 20, 30 to be unfolded or folded when in the second adjustment position.

The safety seat further includes a footrest assembly 50, the footrest assembly 50 being hinged to one end of the seat cushion plate assembly 40, the non-hinged front armrest assembly 60 and the backrest assembly, for supporting the feet of the occupant. The angle of foot pedal assembly 50 may be adjusted to use different requirements. The hinge structure of the footrest assembly 50 and the cushion plate assembly 40 is related to the prior art, and will not be described herein.

The safety seat can control the rotation adjustment of the backrest assembly through the adjusting assembly 10, and the locking and unlocking of the front armrest assembly 60 and the unlocking and locking of the upper backrest assembly 20 and the lower backrest assembly 30 are convenient to operate; and the upper backrest assembly 20 and the lower backrest assembly 30 can be unfolded and folded, so that the volume of the safety seat in the folded state is reduced.

Specifically, as shown in fig. 17 to 31, the cushion plate assembly 40 includes a cushion plate main body, both sides of the cushion plate main body are provided with cushion plate fixing members 401, a slide rail 40B is provided on the cushion plate fixing members 401, the slide rail 40B includes an unlock rail 40B1 and lock grooves 40B2 and unlock grooves 40B3 provided on both sides of the unlock rail 40B1 and communicated with the unlock rail 40B1, the lock grooves 40B2 are provided in plurality, and are provided in sequence along the extending direction of the unlock rail 40B1, and the unlock grooves 40B3 are provided corresponding to the lock grooves 40B2 of the top of each lock groove 40B 2.

The lower back assembly 30 includes a lower back rod 308, one end of the lower back rod 308 is provided with a lower back fixing member 305, and the lower back fixing member 305 is rotatably provided to the cushion plate fixing member 401 through a rotation shaft. The front armrest assembly 60 includes a front armrest rod having a U-shaped structure, the free ends of the two arms of the U-shaped structure being provided with front armrest fixtures 601, respectively, the front armrest fixtures 601 being rotatably disposed on a side of the lower back mount 305 facing away from the cushion plate mount 401.

Further, a lower back lower locking member 307 is slidably provided between the cushion plate fixing member 401 and the lower back fixing member 305, a waist-shaped hole is provided in the lower back lower locking member 307, the waist-shaped hole of the lower back fixing member 305 is provided to extend in the longitudinal direction of the lower back rod 308 of the lower back assembly 30, and a rotation shaft of the lower back fixing member 305 is provided to pass through the waist-shaped hole, and is movable relative to the waist-shaped hole. The lower backrest lower locking member 307 is connected with the adjusting assembly 10, a locking functional block 307A is arranged on one side of the lower backrest lower locking member 307 facing the cushion plate fixing member 401, the locking functional block 307A stretches into the sliding rail 40B and can move in the sliding rail 40B, when the adjusting assembly 10 is in the first adjusting gear, the lower backrest lower locking member 307 slides to the first unlocking position, the locking functional block 307A moves into the unlocking rail 40B1 from the locking groove 40B2, the backrest assembly is unlocked, the backrest assembly can be adjusted in angle, the lower backrest assembly 30 can rotate relative to the cushion plate fixing member 401, and the backrest assembly can be locked at the current angle when the locking functional block 307A stretches into the corresponding locking groove 40B2, so that the lower backrest assembly is convenient to use. When the adjustment assembly 10 is in the second adjustment gear, the lower back lower lock 307 slides to the second unlock position, and the lock function block 307A moves from the unlock rail 40B1 to the unlock groove 40B3.

It should be noted that, the locking groove 40B2 is used to lock the backrest module at a corresponding angle, and the locking groove 40B2 is provided with a plurality of locking grooves to achieve multi-gear adjustment of different angles of the backrest module. In this embodiment, three locking grooves 40B2 are provided, and the three locking grooves 40B2 are uniformly provided along the extending direction of the unlocking rail 40B1, so that the backrest assembly can be stopped at three different angles. The unlocking groove 40B3 is provided opposite to the locking groove 40B2 located at the top.

Further, as shown in fig. 32 to 37, a side of the lower back lower locking member 307 facing away from the cushion plate fixing member 401 is provided with a locking projection 307B, and the locking projection 307B is provided with a first inclined surface 307B1 in the moving direction of the lower back lower locking member 307; a front armrest locking piece 602 is arranged between the front armrest fixing piece 601 and the lower backrest fixing piece 305, the front armrest locking piece 602 can move relative to the front armrest fixing piece 601 along the axial direction of the front armrest fixing piece 601, a locking hole 602A is formed in the front armrest locking piece 602, a locking column 40A is formed in the cushion plate fixing piece 401, the locking column 40A penetrates through the front armrest fixing piece 601 and then stretches into the locking hole 602A, and the front armrest locking piece 602 moves along the axial direction of the front armrest fixing piece 601 so that the locking column 40A stretches into or stretches out of the locking hole 602A; a front armrest locking member 603 is disposed between the front armrest locking member 602 and the lower backrest fixing member 305, the front armrest locking member 603 is capable of moving relative to the lower backrest fixing member 305 along an axial direction of the lower backrest fixing member 305, a guide groove 6031 is disposed on the front armrest locking member 603, an extending direction of the guide groove 6031 is consistent with an extending direction of the locking projection 307B, a second inclined surface 603A is disposed at an end of the guide groove 6031, and when the locking projection 307B is slidably disposed in the guide groove 6031, the lower backrest locking member 307 is switched between an initial position and a first unlocking position and a second unlocking position, and when the lower backrest locking member 307 is slid from the first unlocking position to the second unlocking position, the first inclined surface 307B1 is abutted against the second inclined surface 603A to drive the front armrest locking member 603 and the front armrest locking member 602 to move along the axial direction of the lower backrest fixing member 305 so as to disengage the locking post 40A from the locking hole 602A, and the front assembly 60 is unlocked to perform an unfolding or folding operation of the front assembly 60.

Further, as shown in fig. 22, 24 and 26, the lower back fixing member 305 is provided with an arc-shaped groove 3051, and the locking post 40A passes through the arc-shaped groove 3051 and protrudes into the locking hole 602A, and the locking post 40A can move in the arc-shaped groove 3051 in the extending direction thereof. In this embodiment, two locking posts 40A are provided, two sets of arc-shaped grooves 3051 are provided, the two sets of arc-shaped grooves 3051 are disposed opposite to each other, one locking post 40A is inserted into each arc-shaped groove 3051, and the arc-shaped grooves 3051 limit the rotation range of the lower back assembly 30 when the lower back fixing member 305 rotates relative to the cushion plate fixing member 401.

Preferably, as shown in fig. 18, a first elastic restoring member 604 is provided between the front handrail locking member 602 and the front handrail fixing member 601, and the first elastic restoring member 604 is used for driving the front handrail locking member 602 to move in the axial direction of the front handrail fixing member 601 toward a direction away from the front handrail fixing member 601 so that the locking post 40A protrudes into the locking hole 602A, thereby restoring the front handrail locking member 602.

Alternatively, as shown in fig. 19 and 20, the lower back assembly 30 includes a lower back lock 301, the lower back lock 301 being provided with a first insertion tooth slot 3011, the lower back lock 301 being provided with a beveled protrusion 3012 disposed about its axial direction; the upper backrest assembly 20 comprises an upper backrest fixing member 202, the upper backrest fixing member 202 is rotatably arranged at one side of the lower backrest locking member 301, and a second inserting tooth socket 2021 is arranged on the upper backrest fixing member 202; the upper backrest locking member 301 and the lower backrest locking member 202 are movably arranged along the axial direction of the lower backrest locking member 301, the upper backrest locking tooth 201 and the lower backrest upper unlocking member 302 are in plug-in fit with the second plug-in tooth socket 2021, and are selectively plug-in fit with the first plug-in tooth socket 3011, the upper backrest upper unlocking member 302 penetrates through the upper backrest locking tooth 201 and the lower backrest locking tooth 201 and can be rotatably arranged relative to the lower backrest locking member 301, one side of the upper backrest upper unlocking member 302, which faces the lower backrest locking member 301, is provided with a bevel groove 3021 arranged around the axial direction of the bevel groove 3022, the bevel lug 3012 is movably arranged in the bevel groove 3021, the upper backrest upper unlocking member 302 and the lower backrest lower locking member 307 are connected through a transmission assembly, and when the lower backrest lower locking member 307 moves to the second unlocking position, the transmission assembly drives the upper backrest upper unlocking member 302 to rotate around the axial direction of the upper backrest locking member 3011, so that the bevel lug 3012 rotates in the bevel groove 3021 to drive the upper backrest locking tooth 201 and keep the plug-in the first plug-in tooth socket 3011, and the plug-in tooth socket 2021, the upper backrest locking member 20 and the lower backrest unlocking member 30 are folded and unfolded, and the backrest unlocking assembly can be unfolded.

Preferably, the lower back lock 301 is rotatably provided with a canopy bar assembly 70 for mounting the sunshade, the canopy bar assembly 70 being rotatably provided for folding.

Preferably, a second elastic reset element 205 is disposed between the upper backrest fixing member 202 and the upper backrest upper unlocking member 302, and the second elastic reset element 205 is configured to drive the upper backrest upper unlocking member 302 and the upper backrest locking teeth 201 to move toward a direction approaching the first plugging slots 3011, so as to reset the upper backrest upper unlocking member 302 and the upper backrest locking teeth 201.

As shown in fig. 19, 21, 23 and 25, the transmission assembly includes a fixed rotating member 303 and a transmission structure, the fixed rotating member 303 is disposed in a lower backrest rod 308 of the lower backrest assembly 30, the fixed rotating member 303 is wound with a first traction rope 3041, and one end of the first traction rope 3041 is connected with an upper backrest unlocking member 302; the transmission structure is movably arranged in the lower backrest rod 308, the transmission structure comprises a transmission piece 306 and a traction piece 304, the traction piece 304 is movably arranged on the fixed rotating piece 303 along the extending direction of the lower backrest rod 308, the traction piece 304 is connected with the other end of the first traction rope 3041, a transmission lower end face 306A at the lower end of the transmission piece 306 is abutted with the lower backrest lower locking piece 307, a transmission upper end face 306B at the upper end of the transmission piece 306 can be abutted with the traction piece 304, the traction piece 304 is enabled to move relative to the fixed rotating piece 303, the traction piece 304 is enabled to be abutted with a protrusion on the fixed rotating piece 303, and the upper backrest upper unlocking piece 302 is enabled to rotate under the pulling of the first traction rope 3041.

Preferably, as shown in fig. 19, a third elastic restoring member 309 is disposed between the lower back lower locking member 307 and the transmission member 306, and the third elastic restoring member 309 is used for driving the lower back lower locking member 307 to restore smoothly; in the present embodiment, a third elastic restoring member 309 is provided between the lock upper end surface 307C of the upper end of the lower back lower lock 307 and the transmission member 306. A fourth elastic restoring member 310 is disposed between the transmission member 306 and the lower backrest rod 308, and the fourth elastic restoring member 310 is used for driving the transmission member 306 to restore smoothly.

It should be noted that: the first elastic restoring member 604, the second elastic restoring member 205, the third elastic restoring member 309 and the fourth elastic restoring member 310 are all springs, and have simple structure and low cost.

As shown in fig. 20 and fig. 38 and 39, the adjusting assembly 10 includes an adjusting fixing member 102, an adjusting wrench 101, a secondary adjusting stopper 103 and a secondary adjusting button 104, one end of the adjusting fixing member 102 is mounted on the top end of the upper backrest assembly 20; the adjusting spanner 101 is rotatably arranged at the other end of the adjusting fixing piece 102, a stop dog 1011 is arranged on the adjusting spanner 101, and the free end of the adjusting spanner 101 is connected with the lower backrest lower locking piece 307 through a second traction rope 203 in an upper backrest rod 204 of the upper backrest assembly 20; the secondary adjusting stop block 103 is slidably arranged in the adjusting fixing piece 102 and is switched between a first position and a second position, and when the secondary adjusting stop block 103 is in the first position, the secondary adjusting stop block 103 is abutted with the stop block 1011 of the adjusting spanner 101; when the secondary adjustment stopper 103 moves to the second position, the secondary adjustment stopper 103 is separated from the stopper 1011 of the adjustment wrench 101; the secondary adjustment button 104 is slidably disposed on the adjustment fixture 102 and is coupled to the secondary adjustment stop 103, the secondary adjustment button 104 being configured to drive the secondary adjustment stop 103 between the first position and the second position. The adjustment assembly 10 enables adjustment of both the first adjustment gear and the second adjustment gear by means of an adjustment wrench 101 and a secondary adjustment button 104.

Preferably, a fifth elastic restoring member 105 is provided between the secondary adjustment stopper 103 and the upper backrest rod 204, and the restoring of the secondary adjustment stopper 103 is achieved by the fifth elastic restoring member 105.

As shown in fig. 38, when the angle of the backrest module is adjusted by using the adjustment module 10, the adjustment wrench 101 is moved to rotate the adjustment wrench 101 by a certain angle from the initial position, and when the secondary adjustment stopper 103 abuts against the stopper 1011 of the adjustment wrench 101, the adjustment wrench 101 cannot continue to rotate, and at this time, the adjustment module 10 is in the first adjustment gear, and the lower backrest lower locking member 307 is moved into the unlocking rail 40B1, so that the inclination angle of the backrest module can be adjusted.

As shown in fig. 39, when the adjusting assembly 10 is used to control the locking and unlocking of the front armrest assembly 60 and the upper and lower backrest assemblies 20 and 30, the secondary adjusting button 104 is pushed to drive the secondary adjusting stopper 103 to move from the first position to the second position, the secondary adjusting stopper 103 is separated from the stopper 1011, the secondary adjusting stopper 103 does not stop the rotation of the adjusting spanner 101, and the adjusting assembly 10 is in the second adjusting gear by rotating the adjusting spanner 101 to move the lower backrest lower locking member 307 from the unlocking rail 40B1 into the unlocking groove 40B3, thereby locking and unlocking the front armrest assembly 60 and locking and unlocking the upper and lower backrest assemblies 20 and 30.

Folding process of the safety seat:

1. moving the adjusting wrench 101 (as shown in fig. 38), under the driving of the second traction rope 203, the lower backrest lower locking member 307 moves upwards in the sliding track 40B in the cushion plate assembly 40, so that the locking functional block 307A and the locking protruding block 307B of the lower backrest lower locking member 307 are moved to the relative positions of fig. 28, 29, 30, 32 and 33; at this time, the front armrest assembly 60 is still in the locked state, and the relative positions of the lower backrest locking member 307, the front armrest fixing member 601, the front armrest locking member 602, and the front armrest unlocking member 603 are as shown in fig. 35 and 36; at this time, the gear adjustment of the backrest angle is completed, as shown in fig. 1 to 6.

2. Pushing the secondary adjusting button 104 upwards to enable the secondary adjusting stop block 103 to move upwards, and then moving the adjusting wrench 101 as shown in fig. 39, driving the lower backrest lower locking member 307 to move upwards in the sliding track 40B in the cushion plate assembly 40 through the second traction rope 203, so that the locking convex block 307B of the lower backrest lower locking member 307 is moved to the relative position of fig. 31;

as the lower back lower lock 307 moves upward, the front armrest unlocking member 603 is axially moved as in fig. 25 and 26 by the interaction of the first inclined surface 307B1 of the locking projection 307B of the lower back lower lock 307 with the second inclined surface 603A of the front armrest unlocking member 603; the locking hole 602A of the front armrest locking member 602 is disengaged from the locking post 40A of the cushion plate assembly 40 by the outward movement of the front armrest unlocking member 603 (see fig. 37) to unlock the front armrest assembly 60; during the upward movement of the lower backrest lower locking member 307, the locking upper end surface 307C of the lower backrest lower locking member 307 contacts the transmission lower end surface 306A of the transmission member 306, driving the transmission member 306 to slide upward, the transmission upper end surface 306B of the transmission member 306 contacts the traction block 304, so that the traction block 304 slides upward, the upper backrest upper unlocking member 302 is axially displaced under the driving of the traction block 304, the upper backrest upper unlocking member 302 contacts the upper backrest locking teeth 201 and pushes the upper backrest locking teeth 201 to axially displace and disengage from the lower backrest locking member 301, thereby enabling the upper backrest assembly 20 and the lower backrest assembly 30 to be in an unlocked state and further enter a rotating state, and at the moment, the upper backrest assembly 20 is moved upward to fold in the direction of the lower backrest assembly 30, so that the folding state of the seat is achieved as shown in fig. 15 and 16.

The unfolding process of the safety seat stump comprises the following steps:

1. pushing the secondary adjusting button 104 upwards moves the secondary adjusting block 103 upwards, and then moves the adjusting wrench 101 (as shown in fig. 39), and the lower backrest lower locking member 307 moves upwards in the sliding track 40B in the cushion plate assembly 40 under the driving of the second traction rope 203, so that the locking functional block 307A and the locking protruding block 307B of the lower backrest lower locking member 307 are moved to the relative positions of fig. 31 and fig. 34.

When the lower back lower lock 307 moves upward, the front armrest unlocking member 603 is axially moved to fig. 34 by the interaction of the first inclined surface 307B1 of the locking projection 307B of the lower back lower lock 307 and the second inclined surface 603A of the front armrest unlocking member 603; the locking hole 602A of the front armrest locking member 602 is disengaged from the locking post 40A of the cushion plate assembly 40 by the outward movement of the front armrest unlocking member 603 (see fig. 37) to unlock the front armrest assembly 60; during the upward movement of the lower backrest lower locking member 307, the locking upper end surface 307C of the lower backrest lower locking member 307 contacts the transmission lower end surface 306A of the transmission member 306, the transmission member 306 is driven to slide upward, the transmission upper end surface 306B of the transmission member 306 contacts the traction block 304, the traction block 304 slides upward, the upper backrest upper unlocking member 302 is axially displaced under the driving of the traction block 304, the upper backrest upper unlocking member 302 contacts the upper backrest locking tooth 201 and pushes the upper backrest locking tooth 201 to axially displace and disengage from the lower backrest locking member 301, thereby the upper backrest assembly 20 and the lower backrest assembly 30 are in an unlocked state and further enter a rotating state, at this time, the upper backrest assembly 20 is moved upward to be unfolded in the opposite direction of the lower backrest assembly 30, at this time, the adjusting spanner 101 is released, the secondary adjusting stop 103 is reset by the fifth elastic reset member 105, the lower backrest lower locking member 307 is reset to lock the upper backrest assembly 20 and the lower backrest assembly 30 by the third elastic reset member 309, the transmission member 306 is reset by the fourth elastic reset member 310, the upper backrest locking tooth 201 is reset by the second elastic reset member 205, and the front backrest assembly 30 is reset by the first elastic reset member 602; the front arm rest assembly 60 is then manually moved upwardly to bring the front arm rest assembly 60 and the cushion pan assembly 40 into a locked condition, thereby achieving the deployed condition of the seat pan as shown in figures 7 and 8.

The safety seat stump provided by the embodiment has the following advantages:

1. the folding size is small, and the structure is simple.

2. The backrest assembly and the cushion plate assembly 40 can be in an independent locking state, and the adjusting assembly 10 is operated to enable the whole backrest assembly to be subjected to multi-gear angle adjustment;

the front armrest assembly 60 and the cushion plate assembly 40 are in an independent locking state, and the front armrest assembly 60 keeps unchanged in position when the backrest assembly performs multi-gear angle adjustment;

the adjusting component 10 has two operation functions of adjusting the angle of the backrest component and folding the whole safety seat, and only the adjusting spanner 101 needs to be moved when the inclination angle of the backrest component is adjusted; when the whole safety seat is folded, the secondary adjusting button 104 of the adjusting assembly 10 and the adjusting spanner 101 are required to be operated, so that the multi-gear angle adjustment of the backrest assembly and the folding of the whole safety seat are not confused.

The utility model also provides a safety seat, which comprises the safety seat. The safety seat is simple in overall structure and small in folding occupied space due to the safety seat.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Safety seat is put things in order, its characterized in that includes:

a cushion plate assembly (40);

the backrest assembly comprises an upper backrest assembly (20) and a lower backrest assembly (30), one end of the lower backrest assembly (30) is hinged with the cushion plate assembly (40), and the other end of the lower backrest assembly (30) is hinged with the upper backrest assembly (20);

a front armrest assembly (60), wherein the front armrest assembly (60), the cushion plate assembly (40) and the lower backrest assembly (30) are hinged at the same position; and

The adjusting assembly (10) is arranged on the backrest assembly, the adjusting assembly (10) is provided with a first adjusting gear and a second adjusting gear, and the adjusting assembly (10) is used for controlling the backrest assembly to be locked and unlocked when being positioned in the first adjusting gear so as to adjust the inclination angle of the backrest assembly; when the adjusting assembly (10) is in the second adjusting gear, the adjusting assembly is used for controlling the front armrest assembly (60) to be locked and unlocked and the upper backrest assembly (20) and the lower backrest assembly (30) to be locked and unlocked so as to enable the front armrest assembly (60) and the upper backrest assembly (20) and the lower backrest assembly (30) to be unfolded or folded.

2. The safety seat according to claim 1, wherein the cushion plate assembly (40) comprises a cushion plate fixing member (401), a sliding rail (40B) is arranged on the cushion plate fixing member (401), the sliding rail (40B) comprises an unlocking rail (40B 1) and locking grooves (40B 2) and unlocking grooves (40B 3) which are arranged on two sides of the unlocking rail (40B 1) and are communicated with the unlocking rail (40B 1), the plurality of locking grooves (40B 2) are arranged, the plurality of locking grooves are sequentially arranged along the extending direction of the unlocking rail (40B 1), and the unlocking grooves (40B 3) are correspondingly arranged with the locking grooves (40B 2) which are arranged on the top of each locking groove (40B 2);

The lower backrest assembly (30) comprises a lower backrest fixing member (305), and the lower backrest fixing member (305) is rotatably arranged on the cushion plate fixing member (401);

the front armrest assembly (60) comprises a front armrest fixing piece (601), and the front armrest fixing piece (601) is rotatably arranged on one side of the lower backrest fixing piece (305) which is far away from the cushion plate fixing piece (401);

a lower backrest lower locking piece (307) is slidably arranged between the seat cushion plate fixing piece (401) and the lower backrest fixing piece (305), the lower backrest lower locking piece (307) is connected with the adjusting assembly (10), a locking functional block (307A) is arranged on one side, facing the seat cushion plate fixing piece (401), of the lower backrest lower locking piece (307), the locking functional block (307A) stretches into the sliding track (40B) and can move in the sliding track (40B), when the adjusting assembly (10) is in the first adjusting gear, the lower backrest lower locking piece (307) slides to a first unlocking position, the locking functional block (307A) is moved into the unlocking track (40B 1) by the locking groove (40B 2), the backrest assembly is unlocked, and the lower backrest assembly (30) can rotate relative to the seat cushion plate fixing piece (401) and can be locked in the current angle when the locking functional block (307A) stretches into the corresponding locking groove (40B 2);

When the adjusting assembly (10) is in the second adjusting gear, the lower backrest lower locking member (307) slides to a second unlocking position, and the locking functional block (307A) is moved to the unlocking groove (40B 3) by the unlocking rail (40B 1).

3. The safety seat according to claim 2, characterized in that a side of the lower back lower locking member (307) facing away from the cushion plate fixing member (401) is provided with a locking projection (307B), the locking projection (307B) being provided with a first inclined surface (307B 1) along the moving direction of the lower back lower locking member (307);

a front armrest locking piece (602) is arranged between the front armrest fixing piece (601) and the lower backrest fixing piece (305), the front armrest locking piece (602) can move relative to the front armrest fixing piece (601) along the axial direction of the front armrest fixing piece (601), a locking hole (602A) is formed in the front armrest locking piece (602), a locking column (40A) is arranged on the cushion plate fixing piece (401), the locking column (40A) penetrates through the front armrest fixing piece (601) and then stretches into the locking hole (602A), and the front armrest locking piece (602) moves along the axial direction of the front armrest fixing piece (601) so that the locking column (40A) stretches into or stretches out of the locking hole (602A);

A front armrest unlocking piece (603) is arranged between the front armrest locking piece (602) and the lower backrest fixing piece (305), the front armrest unlocking piece (603) can move along the axial direction of the lower backrest fixing piece (305) relative to the lower backrest fixing piece (305), a guide groove (6031) is arranged on the front armrest unlocking piece (603), the extending direction of the guide groove (6031) is consistent with the extending direction of the locking lug (307B), a second inclined surface (603A) is arranged at the end part of the guide groove (6031), when the locking lug (307B) is slidingly arranged in the guide groove (6031), the lower backrest locking piece (307) is switched between an initial position and a first unlocking position and a second unlocking position, when the lower backrest locking piece (307) is slid to the second unlocking position from the first unlocking position, the first inclined surface (307B 1) abuts against the second inclined surface (603A) to drive the lower backrest locking piece (307) to move along the unlocking shaft (602A), and the locking shaft (602) is separated from the locking shaft (602).

4. A safety seat according to claim 3, characterized in that a first resilient return (604) is provided between the front armrest locking element (602) and the front armrest fixing element (601), the first resilient return (604) being adapted to drive the front armrest locking element (602) in the axial direction of the front armrest fixing element (601) towards a direction away from the front armrest fixing element (601) such that the locking post (40A) protrudes into the locking hole (602A).

5. A safety seat according to claim 3, wherein the lower back assembly (30) comprises a lower back lock (301), the lower back lock (301) being provided with a first plug socket (3011), the lower back lock (301) being provided with a beveled protrusion (3012) arranged around its axial direction;

the upper backrest assembly (20) comprises an upper backrest fixing member (202), the upper backrest fixing member (202) is rotatably arranged on one side of the lower backrest locking member (301), and a second inserting tooth socket (2021) is arranged on the upper backrest fixing member (202);

the upper backrest locking piece (301) and the upper backrest fixing piece (202) are rotatably arranged along the axial direction of the lower backrest locking piece (301), an upper backrest locking tooth (201) and a lower backrest unlocking piece (302) are movably arranged on one side of the upper backrest locking piece (302) facing the lower backrest locking piece (301), the upper backrest locking tooth (201) is in plug-in fit with the second plug-in tooth socket (2021), the upper backrest locking piece (302) is selectively plug-in fit with the first plug-in tooth socket (3011), the upper backrest upper unlocking piece (302) is arranged on the upper backrest locking tooth (201) in a penetrating manner, and can rotate relative to the lower backrest locking piece (301), a bevel groove (3021) arranged around the axial direction of the lower backrest locking piece (301) is arranged on one side of the upper backrest upper unlocking piece (302), a bevel lug (3012) is movably arranged in the bevel groove (3021), the upper backrest upper unlocking piece (302) is connected with the lower backrest locking piece (307) through a transmission component, the lower backrest locking piece (307) is rotatably arranged on the second plug-in the bevel groove (3011) in a rotating manner, and the second plug-in tooth socket (3011) is driven by the bevel groove (3011) to rotate around the axial direction of the upper backrest locking piece (3011), the upper back assembly (20) and the lower back assembly (30) are unlocked.

6. The safety seat according to claim 5, characterized in that a second elastic return element (205) is arranged between the upper backrest fixing element (202) and the upper backrest unlocking element (302), said second elastic return element (205) being adapted to drive the upper backrest unlocking element (302) and the upper and lower backrest locking teeth (201) to return.

7. The safety seat unit of claim 5, wherein the transmission assembly comprises:

the fixed rotating piece (303) is arranged in a lower backrest rod (308) of the lower backrest assembly (30), a first traction rope (3041) is wound on the fixed rotating piece (303), and one end of the first traction rope (3041) is connected with the upper backrest unlocking piece (302);

the transmission structure is movably arranged in the lower backrest rod (308), one end of the transmission structure is abutted against the lower backrest lower locking piece (307), the other end of the transmission structure can be abutted against the fixed rotating piece (303) and connected with the other end of the first traction rope (3041), and the transmission structure moves to stretch the first traction rope (3041) so as to drive the upper backrest upper unlocking piece (302) to rotate.

8. The safety seat according to claim 7, characterized in that a third elastic return element (309) is arranged between the lower back lower locking element (307) and the transmission structure, said third elastic return element (309) being adapted to drive the lower back lower locking element (307) to return;

A fourth elastic reset piece (310) is arranged between the transmission structure and the lower backrest rod (308), and the fourth elastic reset piece (310) is used for driving the transmission structure to reset.

9. The safety seat according to claim 2, wherein said adjustment assembly (10) comprises:

an adjusting fixing piece (102), wherein one end of the adjusting fixing piece (102) is arranged at the top end of the upper backrest assembly (20);

the adjusting spanner (101), the adjusting spanner (101) is rotatably arranged at the other end of the adjusting fixing piece (102), a stop block (1011) is arranged on the adjusting spanner (101), and the free end of the adjusting spanner (101) is connected with the lower backrest lower locking piece (307) through a second traction rope (203) in the upper backrest assembly (20);

a secondary adjustment stop block (103), wherein the secondary adjustment stop block (103) is slidably arranged in the adjustment fixing piece (102) and is switched between a first position and a second position, and when the secondary adjustment stop block (103) is at the first position, the secondary adjustment stop block (103) is abutted with the stop block (1011); when the secondary adjustment stop block (103) moves to the second position, the secondary adjustment stop block (103) is separated from the stop block (1011);

And the secondary adjusting button (104) is arranged on the adjusting fixing piece (102) in a sliding mode and is connected with the secondary adjusting stop block (103), and the secondary adjusting button (104) is configured to drive the secondary adjusting stop block (103) to move between the first position and the second position.

10. Safety seat, characterized in that it comprises a safety seat according to any one of claims 1-9.

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