CN113787948B

CN113787948B - Electronic upper and lower regulation upset headrest

Info

Publication number: CN113787948B
Application number: CN202111268275.XA
Authority: CN
Inventors: 诸思宇; 沈毅能; 毛爱华
Original assignee: Yanfeng International Seating Systems Co Ltd
Current assignee: Yanfeng International Seating Systems Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-09-09
Anticipated expiration: 2041-10-29
Also published as: CN113787948A

Abstract

The invention discloses an electric up-down adjusting turnover headrest, which comprises: a headrest assembly; a base plate connected to the backrest frame; the rotating mechanism assembly comprises a rotating support which is arranged on the bottom plate in a sliding mode, rotating arms are arranged on two sides of the rotating support along the sliding direction respectively, one end of each rotating arm is arranged on the rotating support in a rotating mode, and the other end of each rotating arm is connected with the bottom of a headrest inserted link of the headrest assembly; the sliding block is arranged on the rotating bracket in a sliding mode, the sliding block is connected with the rotating bracket through a first transitional connecting component, and the sliding block is connected with the pair of rotating arms through a second transitional connecting component; and the linear motion driving device is connected with the sliding block so as to drive the sliding block to linearly move along the vertical direction of the headrest.

Description

Electronic upper and lower regulation upset headrest

Technical Field

The invention relates to the technical field of seats, in particular to an electric up-down adjusting turnover headrest.

Background

In a seat with a headrest, for example, a car seat, the headrest of the car seat is a device provided for improving riding comfort and safety, and can not only support the head of a passenger, but also effectively reduce the backward displacement of the head of the passenger when a collision occurs, thereby avoiding the neck injury of the passenger.

Currently, most of the headrests on the common automobile seats only provide a height adjusting function, and even if the seat headrests are adjusted to the lowest position, the seat headrests have the problem of blocking the visual field of the rear passengers, so that the rear passengers are restrained, and the riding comfort of the rear passengers is influenced. In addition, in order to make a larger sitting space for the right passenger in the rear row, the seat in the front-row passenger seat often needs to be adjusted forwards, but at the moment, from the perspective of the driver, the headrest on the passenger seat has the problem of shielding the right rearview mirror, so that the driver can be influenced to observe the rear vehicle, and potential safety hazards are brought to the automobile running.

Although, there is a disclosure of a seat headrest turnover mechanism and an automobile seat in chinese patent application publication No. CN110901486A, the disclosure is directed to a turnover mechanism of a seat headrest, which is driven by a linear driving unit to perform a turnover motion of a turnover unit of the seat headrest relative to a mechanism bracket, so as to turn over the seat headrest. However, the patent only achieves the purpose of headrest overturning, cannot adjust the height of the headrest up and down, and has a single function.

Disclosure of Invention

The invention aims to solve the technical problem of providing an electric up-and-down adjusting and overturning headrest, which not only has the function of adjusting the headrest up and down, but also has the function of overturning the headrest, and solves the problem that the headrest in the prior art can not be adjusted up and down and overturned at the same time.

In order to achieve the above object, an electric reclining headrest according to the present invention includes:

a headrest assembly;

a base plate connected to the backrest frame;

the rotating mechanism assembly comprises a rotating bracket which is arranged on the bottom plate in a sliding mode, two sides of the rotating bracket along the sliding direction are respectively provided with a rotating arm, one end of each rotating arm is rotatably arranged on the rotating bracket, and the other end of each rotating arm is connected with the bottom of a headrest inserted link of the headrest assembly;

the sliding block is arranged on the rotating bracket in a sliding mode, the sliding block is connected with the rotating bracket through a first transitional connecting component, and the sliding block is connected with the pair of rotating arms through a second transitional connecting component;

the linear motion driving device is connected with the sliding block so as to drive the sliding block to linearly move along the vertical direction of the headrest;

when the linear motion driving device drives the sliding block to move from the lower locking position to the unlocking position, the rotating bracket is driven to move upwards under the action of the first transition connecting part, so that the headrest is lifted;

when the sliding block moves to an unlocking position from bottom to top under the action of the linear motion driving device, the first transition connecting component leaves the sliding block and enables the rotating support to be in limit connection with the bottom plate, so that the rotating support does not move upwards along with the sliding block, and the headrest at the moment rises to the highest position;

when the sliding block continuously moves upwards from the unlocking position to the upper locking position under the action of the linear motion driving device, the pair of rotating arms is driven to turn over towards the first direction around the rotating connection points of the pair of rotating arms and the rotating bracket under the action of the second transition connecting component, so that the headrest turns downwards to the headrest turning lower locking position, and the linear motion driving device stops working;

when the sliding block moves downwards from the upper locking position to the unlocking position under the action of the linear motion driving device, the pair of rotating arms are driven to turn over towards a second direction around the rotating connection points of the pair of rotating arms and the rotating bracket under the action of the second transition connecting component, so that the headrest turns upwards to the highest position where the headrest rises;

when the sliding block moves to the lower locking position from the unlocking position under the action of the linear motion driving device, the first transition connecting part is connected with the sliding block and enables the rotating support to be not in limit connection with the bottom plate, the sliding block and the rotating support move together, and the rotating support is driven to move downwards under the action of the first transition connecting part to enable the headrest to fall to the lowest position where the headrest descends.

In a preferred embodiment of the present invention, the first transition connection component includes at least one locking block, a sliding groove slidably engaged with the locking block is provided on the bottom plate, a lower locking groove and an unlocking groove are provided on the sliding groove, a first limiting groove for the locking block to pass through is provided on the rotation bracket, and a second limiting groove engaged with a locking surface of the locking block is provided on the sliding block;

when the linear motion driving device drives the sliding block to move from the lower locking position to the unlocking position, the bottom of the locking block is arranged in the lower locking groove position and the unlocking groove position in a sliding mode, the top of the locking block penetrates through the first limiting groove to enable the locking surface to be matched with the second limiting groove, and the rotating support is driven to move upwards under the action of the locking block to enable the headrest to ascend;

when the sliding block moves to the unlocking position from bottom to top under the action of the linear motion driving device, the bottom of the locking block is positioned at the tail end of the unlocking groove position, the top of the locking block penetrates through the first limiting groove, but the locking surface is separated from the second limiting groove, so that the rotating support does not move upwards along with the sliding block, and the headrest at the moment rises to the highest position;

when the sliding block continuously moves upwards from the unlocking position to the upper locking position under the action of the linear motion driving device, the pair of rotating arms are driven to overturn towards the first direction around the rotating connection points of the pair of rotating arms and the rotating bracket under the action of the second transition connecting component, so that the headrest overturns downwards to the headrest overturning lower locking position, and the linear motion driving device stops working;

when the sliding block moves to the lower locking position from the unlocking position under the action of the linear motion driving device, the bottom of the locking block starts to move downwards from the tail end of the unlocking groove position, the top of the locking block penetrates through the first limiting groove to enable the locking surface to be matched with the second limiting groove again, the sliding block and the rotating support move together, and the rotating support is driven to move downwards under the action of the locking block to enable the headrest to descend to the lowest position where the headrest descends.

In a preferred embodiment of the present invention, the first transition connecting part includes two locking blocks, sliding grooves slidably engaged with the two locking blocks are respectively disposed on two sides of the bottom plate, the lower locking groove is disposed parallel to a moving direction of the rotating bracket, and the unlocking groove is an inclined groove disposed in a direction away from a middle portion of the bottom plate.

In a preferred embodiment of the present invention, the locking surface of each locking block includes a trapezoidal locking surface, the shorter bottom edge of the trapezoidal locking surface is close to the middle of the bottom plate, the longer bottom edge of the trapezoidal locking surface is far from the middle of the bottom plate, and the second limiting groove includes a trapezoidal limiting groove matched with the trapezoidal locking surface.

In a preferred embodiment of the present invention, the second transitional coupling member includes at least one rotating driving shaft, at least one rotating arm is provided with a sliding guide slot corresponding to the rotating driving shaft, the sliding block is provided with at least one assembly hole corresponding to the rotating driving shaft and the sliding guide slot, one end of the rotating driving shaft passes through the sliding guide slot and then is inserted into the assembly hole, and the other end of the rotating driving shaft is connected to the rotating arm;

when the sliding block continuously moves upwards from the unlocking position to the upper locking position under the action of the linear motion driving device, the rotating driving shaft is driven to move in the sliding guide groove, and then the corresponding rotating arm is driven to turn over around the rotating connection point of the corresponding rotating arm and the rotating bracket to the first direction, so that the headrest turns downwards to the headrest turning lower locking position, and the linear motion driving device stops working,

when the sliding block moves downwards from the upper locking position to the unlocking position under the action of the linear motion driving device, the rotating driving shaft is driven to move in the sliding guide groove, and then the corresponding rotating arm is driven to turn over around the rotating connection point of the corresponding rotating arm and the rotating bracket to the second direction, so that the headrest turns upwards to the highest position where the headrest rises,

In a preferred embodiment of the present invention, the second transitional coupling member includes two rotation driving shafts, the pair of swing arms are respectively provided with slide guide grooves corresponding to the two rotation driving shafts, and both sides of the slide block are respectively provided with fitting holes corresponding to the rotation driving shafts and the slide guide grooves.

In a preferred embodiment of the present invention, the rotating bracket is provided with a sliding groove which is matched with the sliding auxiliary block on the bottom of the sliding block.

In a preferred embodiment of the invention, the two sides of the bottom of the rotating bracket are provided with inward flanges, and the inward flanges form sliding rails in sliding fit with the two sides of the bottom plate.

In a preferred embodiment of the present invention, two sides of the upper surface of the rotating bracket are provided with an upper flange, the upper flange is provided with a strip-shaped groove for the rotation driving shaft to move, and one end of the rotating arm is rotatably disposed on the upper flange.

In a preferred embodiment of the present invention, a guide sleeve is disposed at the other end of the pivot arm, and a portion of the bottom of the headrest rod inserted into the guide sleeve is a bending rod.

In a preferred embodiment of the present invention, a sleeve is disposed at the other end of the rotating arm, the guide sleeve is inserted into the sleeve, a clamp spring groove is disposed on the guide sleeve, and a limiting clamp spring is disposed on the clamp spring groove.

In a preferred embodiment of the present invention, the lower portion of the base plate is provided with a mounting edge connected to the linear motion driving means.

In a preferred embodiment of the present invention, the linear motion driving device includes a screw motor, and a screw hole through which a screw of the screw motor passes is formed in a middle portion of the sliding block along a moving direction.

In a preferred embodiment of the present invention, the base plate is provided with a screw rod stabilizing frame which is matched with an end of the screw rod.

In a preferred embodiment of the present invention, the linear motion driving device is connected to a control device, and the control device is set with a corresponding gear position, so that the linear motion driving device drives the sliding block to move to a working position corresponding to the gear position.

In a preferred embodiment of the present invention, the control unit is connected to a sensing system in the seat, and when the headrest is at the highest position and the sensing system senses that a passenger sits on the seat, the control unit disables the linear motion driving unit to prevent injury to the passenger due to the headrest being turned over.

In a preferred embodiment of the present invention, the control means keeps the linear motion driving means operated until the headrest reaches the corresponding use position during the downward turning of the headrest from the uppermost position or the upward turning of the headrest from the lowermost position to the uppermost position.

Due to the adoption of the technical scheme, the headrest turnover mechanism not only has the function of adjusting the headrest up and down, but also has the function of turning the headrest, so that the headrest can be adjusted up and down and turned over at the same time, and the technical shortages of the existing seat for turning the headrest are made up. The invention can also achieve various control modes by arranging the control device to be connected with the linear motion driving device, thereby preventing passengers from being injured.

Drawings

Fig. 1a to 1e are schematic structural views of the headrest of the present invention in cooperation with each other during up-down lifting and turning.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is an exploded view of the structure of the present invention.

Fig. 4 is a schematic structural view of the rotating mechanism assembly of the present invention.

Fig. 5 is a schematic view of the structure of fig. 4 from another perspective.

Fig. 6 is an exploded view of the structure of fig. 5.

Fig. 7 is a schematic structural view of the guide sleeve of fig. 6.

Fig. 8 is a front view of the locking block of the present invention.

Fig. 9 is a side view of fig. 8.

Fig. 10 is a top view of fig. 8.

Fig. 11 is a perspective view of fig. 8.

FIG. 12 is a schematic view of the slider of the present invention from a rear view.

Fig. 13 is a schematic structural diagram of the bottom plate of the present invention.

Fig. 14 is a schematic view of the locking block and the rotary bracket of the present invention engaged in an unlocked position.

Fig. 15 is a schematic view of the engagement of the locking block of the present invention with the rotatable bracket in the locked position.

FIG. 16 is a schematic view of the locking block and the sliding block of the present invention engaged in an unlocked position.

FIG. 17 is a schematic view of the locking block and the sliding block of the present invention engaged in a locked position.

Fig. 18 is a front view of the latch block of the present invention in engagement with a base plate in an unlatched position.

Fig. 19 is a rear view of the latch block of the present invention mated with the base plate in the unlatched position.

FIG. 20 is a front view of the latch block of the present invention in engagement with a base plate in a latched position.

FIG. 21 is a rear view of the engagement of the locking block of the present invention with the base plate in the locked position.

FIG. 22 is a schematic view of the locking block of the present invention engaged with the base plate, the rotating bracket, and the sliding block in a locked position.

FIG. 23 is a schematic view of the locking block, the base plate, the rotary bracket, and the sliding block of the present invention engaged in an unlocked position.

Fig. 24 is a schematic structural view of the base plate and the rotating mechanism assembly of the present invention.

FIG. 25 is a schematic view of a latch of the present invention engaged with a base plate and a rotary mechanism assembly.

FIG. 26 is a second schematic view of the locking block of the present invention engaged with a base plate and a rotary mechanism assembly.

Fig. 27 is a schematic structural view of the screw motor and the slide block in cooperation according to the present invention.

Fig. 28 is a second schematic structural view of the screw motor and the sliding block of the present invention.

FIG. 29 is a schematic view of the structure of the lead screw motor, the sliding block and the rotating mechanism assembly of the present invention.

Fig. 30 is a second schematic structural view of the screw motor, the sliding block and the rotating mechanism assembly of the present invention.

FIG. 31 is a schematic view of the slider and the rotating arm of the present invention.

FIG. 32 is a side view of the slider and rotor arm of the present invention assembled.

Fig. 33 is a schematic view of the assembled headrest stay of fig. 32.

Fig. 34 is a schematic view of the screw stabilizer of the present invention after being assembled.

Fig. 35 is a second schematic structural view of the screw rod stabilizer of the present invention after being assembled.

Figure 36 is a front view of the lead screw stabilizer of the present invention.

Fig. 37 is a side view of fig. 36.

Fig. 38 is a top view of fig. 36.

Fig. 39 is a perspective view of fig. 36.

FIG. 40 is a schematic view (partially cut away) showing the structure of the slider in the locked position according to the present invention.

FIG. 41 is a second schematic view of the slider of the present invention in the locked position.

FIG. 42 is a schematic view of the slider of the present invention in an upward motion (partially cut out of the upturned side of the rotating bracket).

Fig. 43 is a side view of fig. 42.

FIG. 44 is a schematic view (partial cross section of the slider belt) showing the slide of the present invention raised to the unlocked position.

FIG. 45 is a second schematic view of the slider of the present invention being lifted to the unlocking position.

FIG. 46 is a schematic view of the slider of the present invention in the unlocked position with the slider still moving upward (with the slider partially cut away).

Fig. 47 is one of the schematic structural views (partial cross section of the slider belt) of the slider of the present invention when the slider continues to move downward in the unlock position.

FIG. 48 is a second schematic view (with a partial cross section) of the slider of the present invention in its unlocked position as it continues to move downward.

FIG. 49 is a third schematic view of the slider of the present invention moving further downward in the unlocked position.

FIG. 50 is a schematic view of the slider moving upward to unlock the slider to rotate the rotating arm according to the present invention.

Fig. 51 is a side view of fig. 50.

Fig. 52 is a schematic view of the pivoting arm of fig. 51 pivoted to an intermediate position.

Fig. 53 is a schematic view of the structure of the rotating arm in fig. 51 when it is rotated to the uppermost position.

Fig. 54 is a perspective view of fig. 53.

Fig. 55 is a schematic view showing a structure when the headrest of the present invention is turned up.

Fig. 56 is a schematic view of the headrest of the present invention turned up.

FIG. 57 is a rear elevational view of the slider of the present invention as it continues to move downward from the unlocked position.

Fig. 58 is a schematic view showing a configuration in which the headrest of the present invention is lowered to the lowermost position.

Detailed Description

The invention is further described below in conjunction with the appended drawings and detailed description.

Referring to fig. 1a to 58, in the electric up-and-down adjusting and flipping headrest, the headrest assembly 100 of the present invention cannot be flipped when the headrest assembly 100 is lifted up and down on the top of the backrest 200 (see fig. 1a and 1b), and when the headrest assembly 100 is lifted up to the highest position, the headrest is selectively lifted up or flipped (see fig. 1c), and the headrest rod 110 cannot be extended or retracted during the process that the headrest assembly 100 is flipped down to the lowest position at the highest position (see fig. 1d and 1 e).

The electric up-down adjusting turnover headrest is integrally arranged on a backrest framework upper cross beam 210, and an insertion rod hole 211 for the headrest insertion rod 110 to pass through is reserved on the backrest framework upper cross beam 210. An electric up-down adjusting turnover headrest comprises a headrest assembly 100, a bottom plate 300, a rotating mechanism assembly 400, a sliding block 500 and a linear motion driving device 600.

The bottom plate 300 is fixed on the backrest framework upper beam 210, the lower part of the bottom plate 300 is provided with a mounting edge 310, and the mounting edge 310 is provided with a mounting hole 311, so that the linear motion driving device 600 is conveniently fixed on the flanging 310.

The rotation mechanism assembly 400 includes a rotation bracket 410 slidably disposed on the base plate 300, rotation arms 420 are respectively disposed on both sides of the rotation bracket 410 in the sliding direction, one end of each rotation arm 420 is rotatably disposed on the rotation bracket 410 by a pin 416 passing through a pin hole 415, and the other end is connected to the bottom of the headrest rod 110 of the headrest assembly 100.

The sliding block 500 is slidably disposed on the rotating bracket 410, the sliding block 500 is connected to the rotating bracket 410 by a first intermediate connecting member, and the sliding block 500 is connected to the pair of rotating arms 420 by a second intermediate connecting member.

The linear motion driving means 600 is connected to the sliding block 500 to drive the sliding block 500 to move linearly in the up-down direction of the headrest.

When the linear motion driving device 600 drives the sliding block 500 to move from the lower locking position to the unlocking position, the rotating bracket 410 is driven to move upwards through the action of the first transition connecting part, so that the headrest rises;

when the sliding block 500 moves from bottom to top to the unlocking position under the action of the linear motion driving device 600, the first transition connecting component leaves the sliding block 500 and enables the rotating bracket 410 to be in limit connection with the bottom plate 300, so that the rotating bracket 410 does not move upwards along with the sliding block 500, and the headrest at the moment rises to the highest position;

when the sliding block 500 continues to move upwards from the unlocking position to the upper locking position under the action of the linear motion driving device 600, the pair of rotating arms 420 are driven to turn around the rotating connection points of the pair of rotating arms 420 and the rotating bracket 410 to a first direction under the action of the second transitional connection part, so that the headrest turns downwards to a headrest turning lower locking position, and the linear motion driving device 600 stops working;

when the sliding block 500 moves downwards from the upper locking position to the unlocking position under the action of the linear motion driving device 600, the pair of rotating arms 420 are driven to turn over towards the second direction around the rotating connection points of the pair of rotating arms 420 and the rotating bracket 410 under the action of the second transition connection component, so that the headrest turns upwards to the highest position where the headrest rises;

when the sliding block 500 moves from the unlocking position to the lower locking position under the action of the linear motion driving device 600, the first transition connecting part is connected with the sliding block 500 and enables the rotating bracket 410 to be not in limit connection with the bottom plate 300 any more, so that the sliding block 500 and the rotating bracket 410 move together, and the rotating bracket 410 is driven to move downwards under the action of the first transition connecting part to enable the headrest to descend to the lowest position where the headrest descends.

Specifically, the bottom plate 300 in this embodiment is provided with a mounting groove 330, a pair of sliding grooves 320 and a plurality of weight reduction grooves 301, the pair of sliding grooves 320 are disposed on two sides of the bottom plate 300, the sliding grooves 320 are provided with a lower locking groove 321 and an unlocking groove 322, the lower locking groove 321 is disposed in parallel with the moving direction of the rotating bracket 320, and the unlocking groove 322 is a chute disposed in a direction away from the middle of the bottom plate 300.

The first transitional coupling member comprises two locking blocks 700, the two locking blocks 700 are in sliding fit with the pair of sliding grooves 320, the sliding columns 710 sliding along the sliding grooves 320 are arranged at the bottoms of the locking blocks 700, the locking surface 720 is arranged at the top of the locking block 700, the locking surface 720 comprises a trapezoidal locking surface, the shorter bottom edge 721 of the trapezoidal locking surface is close to the middle part of the bottom plate, and the longer bottom edge 722 of the trapezoidal locking surface is far away from the middle part of the bottom plate. The rotating bracket 410 is provided with a first limit groove 411 for the locking block 700 to pass through, the side part of the bottom surface of the sliding block 500 is provided with a second limit groove 530 matched with the locking surface 720 of the locking block 700, and the second limit groove 530 comprises a trapezoidal limit groove matched with the trapezoidal locking surface.

The second transitional coupling member includes two rotation driving shafts 800, a pair of the rotation arms 420 are provided with sliding guide grooves 421 corresponding to the two rotation driving shafts 800, both sides of the sliding block 500 are respectively provided with fitting holes 540 corresponding to the rotation driving shafts 800 and the sliding guide grooves 421, and the upper surface of the sliding block 500 is further provided with a lightening groove 510. The rotation driving shaft 800 has one end inserted into the fitting hole 540 after passing through the sliding guide groove 421 and the other end coupled to the rotation arm 420.

The rotating bracket 410 is provided with a sliding groove 412 which is matched with a sliding auxiliary block 520 on the bottom of the sliding block 500, two sides of the bottom of the rotating bracket 410 are provided with inner flanges 417, and the inner flanges 417 form sliding rails which are in sliding fit with two sides of the bottom plate 300. Two sides of the upper surface of the rotating bracket 410 are provided with upper flanges 413, the upper flanges 413 are provided with strip-shaped grooves 414 for the movement of the rotating driving shaft 500, one end of a rotating arm 420 is rotatably arranged on the upper flanges 413 through a rotating pin 416 matched with a pin hole 415, the other end of the rotating arm 420 is provided with a guide sleeve 430 for the bottom of the headrest inserting rod 110 of the headrest assembly 100 to be inserted, and the part of the bottom of the headrest inserting rod 110 inserted into the guide sleeve 430 is a bending rod 111. The guide sleeve 430 is inserted into the sleeve 440 on the other end of the rotating arm 420, the tail end of the guide sleeve 430 is provided with an alignment boss 431, the front end is provided with a clamp spring groove 432, and the clamp spring groove 432 is provided with a limit clamp spring 433, so that the guide sleeve 430 can be accurately and stably fixed in the sleeve 440.

The linear motion driving device 600 is used for driving the sliding block 500 to perform linear reciprocating motion, the linear motion driving device 600 in this embodiment includes a lead screw motor 610, and a thread hole 550 is formed in the middle of the sliding block 500 along the moving direction, through which a lead screw 620 of the lead screw motor 610 passes. In order to further improve the stability of the lead screw 620, the base plate 300 is provided with a lead screw stabilizer 900 engaged with an end of the lead screw 620. The lead screw stabilizer 900 includes a fixing hole 910 to be fitted to an end of the lead screw 620 and a catch 920 to be fixed to the mounting groove 330.

With reference to fig. 24 to 39, the assembly process of the present invention is as follows:

the two sides of the base plate 300 slide along the sliding rails formed by the inward flanges 417 at the two sides of the bottom of the rotating bracket 410, then the locking block 700 is installed in the first limiting groove 411, and the sliding column 710 is installed in the lower locking groove 321, as shown in fig. 24 to 26.

The lead screw 620 of the lead screw motor 610 passes through the thread hole 550 of the slide block 500 such that the front surface of the slide block 500 faces upward, as shown in fig. 27 to 28.

The rotating bracket 410 is slid to the uppermost position so that the sliding post 710 is positioned in the unlocking slot 322, the sliding block 500 is moved upward so that the sliding auxiliary block 520 is slid into the sliding groove 412, and when the sliding block 500 is slid to the unlocking position, one end of the rotating drive shaft 800 is inserted into the fitting hole 540 after passing through the sliding guide slot 421, and the other end is coupled to the rotating arm 420, as shown in fig. 29 to 33.

The clamping leg 920 of the lead screw stabilizer 900 is assembled on the mounting groove 330, the end of the lead screw 620 is installed into the fixing hole 910 of the lead screw stabilizer 900, and the lead screw motor 610 is fixed with the mounting hole 311 of the mounting edge 310 by a fastener, as shown in fig. 34 to 39.

Referring to fig. 40 to 58, the working principle of the present invention is as follows:

when the screw motor 610 drives the sliding block 500 to move from the lower locking position to the unlocking position, the sliding column 710 at the bottom of the locking block 700 is slidably disposed in the lower locking slot 321 and the unlocking slot 322, the top of the locking block 700 passes through the first limiting slot 411 to enable the locking surface 720 to be matched with the second limiting slot 530, the rotating support 410 is driven to move upwards through the action of the locking block 700 to enable the headrest to ascend, meanwhile, the rotating drive shaft 800 and the rotating support 410 do not move relatively, the rotating arm 420 cannot be driven to rotate, and therefore the headrest is integrally adjusted up and down without being overturned, as shown in fig. 40 to 43.

When the sliding block 500 moves from bottom to top to the unlocking position under the action of the lead screw motor 610, the sliding column 710 at the bottom of the locking block 700 is located at the tail end of the unlocking slot position 322, the top of the locking block 700 passes through the first limiting groove 411, but the locking surface 720 is separated from the second limiting groove 530, the locking block 700 is also stopped at the tail end of the unlocking slot position 322, and the locking block 700 and the rotating bracket 410 complete upward limiting, so that the rotating bracket 410 does not move upward along with the sliding block 500, and the headrest at the moment is lifted to the highest position, as shown in fig. 44 and 45.

When the slide block 500 continues to move upward from the unlock position to the upper lock position under the action of the lead screw motor 610, the rotary driving shaft 800 is driven to move in the slide guiding slot 421, and further the corresponding rotary arm 420 is driven to turn over around the rotary connection point of the corresponding rotary arm 420 and the rotary bracket 410 in a first direction (the first direction in this embodiment is the counterclockwise arrow direction in fig. 52 and 53), so that the headrest turns downward to the headrest turning lower lock position, and the lead screw motor 610 stops working, as shown in fig. 46 and 50 to 54.

When the slide block 500 moves downward from the upper locking position to the unlocking position under the action of the lead screw motor 610, the rotary driving shaft 800 is driven to move in the slide guiding groove 421, and further the corresponding rotary arm 420 is driven to turn around the rotary connection point of the corresponding rotary arm 420 and the rotary bracket 410 to a second direction (the second direction in this embodiment is a clockwise direction opposite to the counterclockwise arrow direction in fig. 52 and 53), so that the headrest is turned upward to the highest position where the headrest rises, as shown in fig. 55 to 57.

When the sliding block 500 moves from the unlocking position to the lower locking position under the action of the lead screw motor 610, the sliding column 710 at the bottom of the locking block 700 starts to move from the end of the unlocking slot position 322 to the lower locking slot position 321, the top of the locking block 700 passes through the first limiting slot 411 so that the locking surface 720 is matched with the second limiting slot 530 again, and then the sliding block 500 and the rotating bracket 410 move together, and the rotating bracket 410 is driven to move downwards through the action of the locking block 700 so that the headrest descends to the lowest position where the headrest descends, as shown in fig. 47 to 49 and 58.

In order to facilitate the control of the invention and improve the safety, the screw motor 610 is connected with the control device, and the control device is provided with a corresponding gear, so that the screw motor 610 drives the sliding block 500 to move to a working position corresponding to the gear, thereby avoiding the problem that the headrest can not effectively protect passengers when the headrest is used at a non-use position. In addition, controlling means also can be connected with the induction system on the seat, and when the headrest was located the highest position and induction system sensed that there was the passenger to sit on the seat, controlling means made lead screw motor 610 unable work to prevent that the headrest upset from causing the injury to the passenger. When the headrest is turned downwards from the highest position or the headrest is turned upwards from the lowest turning position to the highest position, the control device enables the screw rod motor 610 to continuously work until the headrest reaches the corresponding use position, and the headrest is enabled to be turned in place.

Of course, the invention can also design a one-key turnover function, and a one-key turnover key of the backrest of the seat is connected with a work trigger key of the linear motion driving device, so that the turnover of the headrest and the turnover of the backrest are synchronous; the invention can also design a one-key reset function, and a one-key reset key of the backrest of the seat is connected with a work trigger key of the linear motion driving device, so that the headrest turnover and the backrest reset motion are synchronous.

It should be understood by those skilled in the art that the foregoing detailed description is only a detailed description of the embodiments of the present invention, and should not be taken as limiting the scope of the invention as claimed. Those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention as defined by the appended claims.

Claims

1. An electric up-down adjustment roll headrest comprising:

the headrest assembly, its characterized in that still includes:

a base plate connected to the backrest frame;

the rotating mechanism assembly comprises a rotating support which is arranged on the bottom plate in a sliding mode, rotating arms are arranged on two sides of the rotating support along the sliding direction respectively, one end of each rotating arm is arranged on the rotating support in a rotating mode, and the other end of each rotating arm is connected with the bottom of a headrest inserted link of the headrest assembly;

when the linear motion driving device drives the sliding block to move from the lower locking position to the unlocking position, the rotating bracket is driven to move upwards through the action of the first transition connecting part, so that the headrest rises;

when the sliding block moves downwards from the upper locking position to the unlocking position under the action of the linear motion driving device, the pair of rotating arms are driven to turn over around the rotating connection points of the pair of rotating arms and the rotating support to the second direction under the action of the second transition connecting component, so that the headrest turns upwards to the highest position where the headrest rises;

2. The electric up-down adjusting turnover headrest as claimed in claim 1, wherein the first transition connecting member comprises at least one locking block, the bottom plate is provided with a sliding groove in sliding fit with the locking block, the sliding groove is provided with a lower locking groove position and an unlocking groove position, the rotating bracket is provided with a first limiting groove for the locking block to pass through, and the sliding block is provided with a second limiting groove in fit with a locking surface of the locking block;

when the linear motion driving device drives the sliding block to move from the lower locking position to the unlocking position, the bottom of the locking block is arranged in the lower locking groove position and the unlocking groove position in a sliding mode, the top of the locking block penetrates through the first limiting groove to enable the locking surface to be matched with the second limiting groove, and the rotating support is driven to move upwards through the action of the locking block to enable the headrest to ascend;

when the sliding block moves to the lower locking position from the unlocking position under the action of the linear motion driving device, the bottom of the locking block starts to move downwards from the tail end of the unlocking slot position, the top of the locking block penetrates through the first limiting groove to enable the locking surface to be matched with the second limiting groove again, the sliding block and the rotating support move together, and the rotating support is driven to move downwards through the action of the locking block to enable the headrest to descend to the lowest position where the headrest descends.

3. The electric up-down adjusting turnover headrest as claimed in claim 2, wherein the first transitional connecting part comprises two locking blocks, sliding grooves slidably engaged with the two locking blocks are respectively disposed on two sides of the base plate, the lower locking groove is disposed parallel to the moving direction of the rotary bracket, and the unlocking groove is an inclined groove disposed in a direction away from the middle of the base plate.

4. The headrest of claim 3, wherein the locking surface of each locking block comprises a trapezoidal locking surface, the shorter base of the trapezoidal locking surface is close to the middle of the base plate, the longer base of the trapezoidal locking surface is far away from the middle of the base plate, and the second limiting groove comprises a trapezoidal limiting groove matched with the trapezoidal locking surface.

5. An electric up-down adjusting headrest as claimed in any one of claims 1 to 4, wherein the second transitional coupling member comprises at least one rotary driving shaft, at least one rotary arm is provided with a sliding guide slot corresponding to the rotary driving shaft, the sliding block is provided with at least one fitting hole corresponding to the rotary driving shaft and the sliding guide slot, one end of the rotary driving shaft passes through the sliding guide slot and then is inserted into the fitting hole, and the other end of the rotary driving shaft is connected to the rotary arm;

when the sliding block moves to the unlocking position from bottom to top under the action of the linear motion driving device, the first transition connecting part leaves the sliding block and enables the rotating bracket to be in limit connection with the bottom plate, so that the rotating bracket does not move upwards along with the sliding block, the headrest rises to the highest position at the moment,

when the sliding block moves downwards from the upper locking position to the unlocking position under the action of the linear motion driving device, the rotary driving shaft is driven to move in the sliding guide groove, and then the corresponding rotating arm is driven to turn over around the rotating connection point of the corresponding rotating arm and the rotary bracket to the second direction, so that the headrest turns upwards to the highest position of the headrest which rises,

when the sliding block moves to the lower locking position from the unlocking position under the action of the linear motion driving device, the first transition connecting part is connected with the sliding block and enables the rotating support to be not in limit connection with the bottom plate, the sliding block and the rotating support move together, and the rotating support is driven to move downwards under the action of the first transition connecting part to enable the headrest to descend to the lowest position where the headrest descends.

6. An electric headrest for reclining and tilting as defined in claim 5, wherein said second transitional coupling member includes two rotation driving shafts, a pair of said pivoting arms are respectively provided with sliding guide grooves corresponding to said two rotation driving shafts, and said sliding blocks are respectively provided at both sides thereof with fitting holes corresponding to said rotation driving shafts and said sliding guide grooves.

7. An electric up-down adjusting headrest as claimed in claim 1 wherein the rotary bracket is provided with a slide groove for engaging with a slide assist block on the bottom of the slide block.

8. The headrest for up-and-down adjustment according to claim 1, wherein two sides of the bottom of said rotary bracket are provided with inner flanges, said inner flanges forming sliding rails slidably engaged with two sides of said base plate.

9. The headrest of claim 5, wherein two sides of the upper surface of the rotary bracket are provided with an upper flange, the upper flange is provided with a strip-shaped groove for moving the rotary driving shaft, and one end of the rotating arm is rotatably arranged on the upper flange.

10. The headrest assembly as claimed in claim 1, wherein a guide sleeve is provided at the other end of the pivot arm for receiving a bottom portion of a headrest rod of the headrest assembly, and the bottom portion of the headrest rod is inserted into the guide sleeve by a bending rod.

11. The headrest of claim 10, wherein a sleeve is disposed at the other end of the rotating arm, the guide sleeve is inserted into the sleeve, a clamp spring groove is disposed on the guide sleeve, and a limit clamp spring is disposed on the clamp spring groove.

12. An electrically operated reclining headrest according to claim 1 wherein the lower portion of said base plate is provided with a mounting edge connected to a linear motion actuator.

13. An electric up-down adjusting headrest according to claim 12 wherein the linear motion driving means comprises a lead screw motor, and the middle portion of the slide block is provided with a threaded screw hole for passing a lead screw of the lead screw motor in the moving direction.

14. An electrically adjustable up-down headrest according to claim 13 wherein a lead screw stabilizer is provided on the base plate engaging an end of the lead screw.

15. An electric up-down adjusting headrest according to claim 1, wherein the linear actuator is connected to a control device, and the control device is set with a corresponding shift position, so that the linear actuator drives the slide block to move to the working position corresponding to the shift position.

16. An electrically actuated tilt up and down headrest according to claim 15 wherein said control means is connected to a sensing system on the seat such that when the headrest is in the uppermost position and the sensing system senses a passenger sitting on the seat, the control means disables said linear motion drive means to prevent injury to the passenger from tilting the headrest.

17. An electrically powered roll-over headrest for adjustment up and down according to claim 15 wherein the control means causes the linear motion drive means to continue to operate until the headrest reaches the respective use position during roll-over of the headrest down from the uppermost position or roll-over of the headrest up from the lowermost position to the uppermost position.