CN118651141B

CN118651141B - Electric adjustable headrest

Info

Publication number: CN118651141B
Application number: CN202411154893.5A
Authority: CN
Inventors: 易通权; 王瑞发; 赵威武; 马健; 杜纪平
Original assignee: Ningbo Shuanglin Automobile Parts Co ltd
Current assignee: Ningbo Shuanglin Automobile Parts Co ltd
Priority date: 2024-08-22
Filing date: 2024-08-22
Publication date: 2024-11-15
Anticipated expiration: 2044-08-22
Also published as: CN118651141A

Abstract

The application discloses an electric adjusting headrest, which comprises a fixed frame, a headrest body and a driving mechanism, wherein the headrest body is arranged on the side part of the fixed frame in a curve sliding way; the driving mechanism is suitable for driving the headrest body to perform curve lifting adjustment along the fixing frame, and at the moment, the driving mechanism is suitable for moving along the fixing frame under the action of the floating assembly so as to be matched with the curve track of the headrest body. The application has the beneficial effects that: through with headrest body curved slidable mounting at the mount, and then under actuating mechanism's effect, can make the headrest body carry out curved lift adjustment, can make the headrest body adapt to with the arc that seat was back can be better after adjusting like this, more accords with human engineering, improves the comfort of taking, solves the easy dead problem of headrest lift under the long stroke radian orbit simultaneously.

Description

Electric adjusting headrest

Technical Field

The application relates to the technical field of automobile accessories, in particular to an electric adjusting headrest.

Background

The automobile headrest is a driving comfort configuration article and a safety protection article. When the vehicle is in rear-end collision, the human body can fall backwards due to inertia, at the moment, the acceleration or deceleration pressure of the vehicle is concentrated on the fragile neck and head of the human body, and the headrest plays a role in buffering the fragile neck and head of the human body, so that the head of the human body is protected.

Because the height and the sitting posture of each person are different, the height requirements on the automobile headrest are different, so that more and more electric liftable headrests on the market are generated, the existing headrests are in a vertical lifting and vertical lifting adjusting mode, and the radian of the headrests and the back of the seat cannot be well adapted after adjustment, so that discomfort is caused during use. Therefore, the technical trend of adopting arc lifting is more and more obvious, but the risk of easy lifting and locking is brought about, and an electric adjusting headrest is provided for solving the technical problems.

Disclosure of Invention

One of the objects of the present application is to provide an electrically adjustable headrest.

In order to achieve the above purpose, the application adopts the following technical scheme: the electric regulation headrest comprises a fixed frame, a headrest body and a driving mechanism, wherein the headrest body is in curve sliding installation on the side part of the fixed frame, the driving mechanism is installed at the bottom end of the fixed frame through a floating assembly, and the output end of the driving mechanism is connected with the headrest body; the driving mechanism is suitable for driving the headrest body to perform curve lifting adjustment along the fixed frame, and at the moment, the driving mechanism is suitable for moving along the fixed frame under the action of the floating assembly so as to be matched with the curve track of the headrest body; the floating assembly comprises an elastic piece, and the driving mechanism is arranged on the fixed frame through the elastic piece; when the headrest body is adjusted, the elastic piece is suitable for elastic deformation so that the driving mechanism moves along the fixing frame; and/or the floating assembly comprises a floating block and a floating groove, wherein the floating block is arranged on the driving mechanism, and the floating groove is arranged on the fixed frame; the floating block is matched with the floating groove in a clamping way, and a movable gap is reserved between the floating block and the floating groove, so that the driving mechanism moves along the fixing frame.

Preferably, the top end of the fixing frame is provided with a mounting groove communicated with the floating groove; when the driving mechanism is installed, the floating block is suitable for being matched with the installation groove, then the floating block is suitable for moving along the installation groove until being in clamping fit with the floating groove, and the floating block is locked on the fixing frame through the limiting component.

Preferably, the limiting assembly comprises a limiting block and a limiting groove, the limiting block is mounted on the floating block, and the limiting groove is formed in the fixing frame; or the limiting block is arranged on the fixed frame, and the limiting groove is formed in the floating block; the limiting block is matched with the limiting groove to realize locking limiting of the floating block.

Preferably, the slider is engaged with the driving mechanism with a clamping gap left therebetween, and the elastic member is disposed in the clamping gap and is engaged with the slider and the driving mechanism in a pushing manner.

Preferably, the bottom end of the floating block is provided with a clamping block with an I-shaped structure, the top end of the driving mechanism is provided with a clamping groove, and the upper ends of the inner walls of the two sides of the clamping groove extend inwards to form a protruding part, so that the clamping groove is in a T-shaped structure; the two sides of the elastic piece are inwards recessed to form a recessed part, and a slot is formed in the middle of the elastic piece; the protruding portion is in plug-in fit with the recessed portion, the vertical section of the clamping block is in plug-in fit with the slot and the clamping groove, and the elastic piece is in butt fit with the outer portions of two sides of the clamping block.

Preferably, the bottom of headrest body installs curved pole, curved pole's bottom with actuating mechanism's output is connected, the sleeve is installed to the lateral part of mount, curved pole with telescopic sliding fit realizes the curved slidable mounting of headrest body.

Preferably, the driving mechanism comprises a frame, a driving device, a screw rod and a driving plate, the frame is mounted at the bottom end of the fixing frame through the floating assembly, the screw rod is vertically rotatably mounted at the frame, the driving plate is vertically slidably mounted at the frame and matched with the screw rod, the driving plate is detachably mounted at the bottom end of the curved rod, the driving device is mounted at the frame and connected with the screw rod through an output end, and then the screw rod drives the driving plate to lift under the driving of the driving device.

Compared with the prior art, the application has the beneficial effects that:

According to the invention, the headrest body is slidably arranged on the fixed frame in a curve manner, so that the headrest body can be subjected to curve lifting adjustment under the action of the driving mechanism, and the arc shape of the headrest body and the seat backrest can be better adapted after the adjustment, so that the headrest body is more in accordance with the ergonomics, and the comfort of riding is improved; meanwhile, the driving mechanism can move along the fixing frame under the action of the floating assembly, so that the driving mechanism is matched with the curve track of the headrest body, and the problem that the headrest is easy to be blocked when lifted under the long-stroke radian track is solved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic side view of the present invention.

Fig. 3 is a schematic view showing a state when the headrest is raised and lowered in a curved manner.

Fig. 4 is a schematic view of a driving mechanism according to the present invention.

Fig. 5 is a schematic diagram of the swing range of the driving mechanism of the present invention.

Fig. 6 is a schematic view of the partial structure of fig. 5 according to the present invention.

Fig. 7 is a schematic diagram showing the cooperation installation of the fixing frame and the driving mechanism.

Fig. 8 is a schematic view of the fixing frame and the driving mechanism of the present invention when separated.

FIG. 9 is a schematic illustration of a floating assembly embodying the present invention.

FIG. 10 is a schematic illustration of a slider, spring, and clip groove according to the present invention.

Fig. 11 is a schematic view of a limiting assembly and a mounting groove structure according to the present invention.

Fig. 12 is a schematic view of the moving mechanism of the present invention when assembled with the fixed frame.

In the figure: 1. a headrest body; 2. a driving mechanism; 201. a driving device; 202. a screw rod; 203. a driving plate; 204. a frame; 3. soundproof cotton; 4. a fixing frame; 5. a curved bar; 6. a sleeve; 7. a floating assembly; 701. an elastic member; 702. a slider; 703. a floating tank; 8. a mounting groove; 9. a limit component; 901. a limiting block; 902. a limit groove; 10. a clamping groove; 11. a recessed portion; 12. a slot; 13. a boss; 14. a clearance gap; 15. and (5) clamping the gap.

Detailed Description

The present application will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present application, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present application that the device or element referred to must have a specific azimuth configuration and operation.

It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

In the prior art, the electric headrest on the backrest of the automobile is adjusted in a vertical lifting mode, and for a car, the inside of the electric headrest is generally provided with front and rear rows of seats, and the backrest of the seats is higher, so that the electric headrest can be adjusted in a vertical lifting mode. However, for some seven-seat or nine-seat vehicles, there is a third row of seats, and in order to make the rear side of the vehicle have a larger usage space, the third row of seats are generally foldable, and of course, the seats in this row are also shorter, so that the travel of the headrest during adjustment is longer, which causes such problems: the radian of the headrest and the back of the seat after adjustment cannot be well adapted, i.e. does not conform to the ergonomics, and thus gives uncomfortable feeling to the passengers. Of course, currently, there are also headrests on the market which use arc lifting, but the adjusting stroke is shorter; if a long-stroke arc lifting adjustment mode is adopted, the risk of lifting and clamping is easily brought.

The inventor of the present application has thus developed an electrically adjustable headrest, one embodiment of which is shown in fig. 1 to 12, comprising a fixed frame 4, a headrest body 1 and a driving mechanism 2, wherein the headrest body 1 is curvedly slidably mounted on the side of the fixed frame 4, the driving mechanism 2 is mounted on the bottom end of the fixed frame 4 through a floating assembly 7, and the output end is connected with the headrest body 1.

It can be understood that when the height of the headrest body 1 is adjusted, in the initial state, as shown in (a) of fig. 3, the driving mechanism 2 is started to drive the headrest body 1 to perform the curve upward movement adjustment along the fixing frame 4 when the driving mechanism 2 is started in the lowest state of the headrest body 1, as shown in (b) of fig. 3; and then can laminate with passenger's head can be better, great improvement travelling comfort, the easy dead problem of card of headrest lift under the long stroke radian orbit is solved simultaneously.

It should be noted that, when the headrest body 1 is raised and lowered in a curved manner, it is displaced in a horizontal direction while being moved in a vertical direction, so that the driving mechanism 2 cannot be fixedly mounted, otherwise, the curved raising and lowering of the headrest body 1 is interfered, and thus, the driving mechanism 2 is mounted by using the floating assembly 7. That is, while the driving mechanism 2 drives the headrest body 1 to move upwards, the driving mechanism 2 can move (swing) along the fixing frame 4 under the action of the floating assembly 7, so that the driving mechanism 2 is adapted to the curved track of the headrest body 1.

It should be noted that, it is known that there should be a certain inclination angle between the backrest and the seat cushion of the automobile, that is, the backrest and the seat cushion will not be in a vertical state, so that the comfort of the backrest of the human body can be met. If the headrest body 1 is adjusted, the headrest body 1 is adjusted in a tilting manner along the tilting backrest in a linear lifting manner, so that the headrest body 1 is adjusted to be higher, the direction of the backrest can be away from, and the head of a passenger can be matched with the headrest body 1 only by tilting backwards a lot, thereby bringing uncomfortable feeling. Therefore, when the headrest body 1 is lifted, the headrest body needs to move forward relative to the backrest to approach, so that people with different heights can be matched for comfort. It should be noted that the headrest body 1 will not deviate too much from the original position during the upward movement, and thus the deviation swing angle θ of the driving mechanism 2 should not be too large, for example, θ may be between 5 ° and 15 °.

In one embodiment of the present application, as shown in fig. 6-11, the floating assembly 7 has a variety of structural forms, including, but not limited to, the following three:

structure one: as shown in fig. 6, the floating assembly 7 includes an elastic member 701, and the driving mechanism 2 is mounted to the fixing frame 4 through the elastic member 701.

It is understood that, for example, the elastic member 701 may be made of rubber or silica gel, and the elastic member 701 may be deformed when being subjected to pressure; therefore, when the headrest body 1 is adjusted in a curved manner, the elastic member 701 can be elastically deformed to enable the driving mechanism 2 to move (swing) along the fixing frame 4.

And (2) a structure II: as shown in fig. 7 and 8, the slider assembly 7 includes a slider 702 and a slider groove 703, the slider 702 is mounted on the driving mechanism 2, the slider groove 703 is provided on the mount 4, the slider 702 is engaged with the slider groove 703 with a clearance 14 left therebetween.

It will be appreciated that relative movement between slider 702 and floating groove 703 is possible due to the presence of clearance gap 14. Further, when the head rest body 1 is adjusted in a curved manner, the driving mechanism 2 can be moved (swung) along the fixing frame 4 by the engagement of both the slider 702 and the floating groove 703.

And (3) a structure III: the floating assembly 7 comprises an elastic member 701, a floating block 702 and a floating groove 703, wherein the floating block 702 is connected with the driving mechanism 2 through the elastic member 701, and the floating groove 703 is arranged on the fixed frame 4; slider 702 is snap fit to floating groove 703 with a clearance gap 14 left therebetween.

It can be understood that due to the existence of the movable gap 14 and the arrangement of the elastic member 701, when the headrest body 1 performs the curved lifting adjustment, the driving mechanism 2 can move (swing) along the fixed frame 4 due to the cooperation of the slider 702 and the floating groove 703 and the deformation of the elastic member 701.

It should be noted that all three structures can meet the actual requirements, and those skilled in the art can select according to the actual conditions. It should be noted that, for the first construction, the amplitude by which the driving mechanism 2 can oscillate depends on the degree of deformation of the elastic member 701. For structure two, the amplitude by which drive mechanism 2 can oscillate is dependent on the clearance 14 between slider 702 and floating groove 703. For the third structure, the two structures are combined with each other, that is, the amplitude of the driving mechanism 2 capable of swinging depends on the deformation degree of the elastic member 701 and the size of the movable gap 14, so that the deformation degree of the elastic member 701 and the movable gap 14 can compensate each other when the device is specifically set, thereby making the stability of the driving mechanism 2 better and improving the service life of the whole mechanism.

For example, assuming that the swing amplitude of the driving mechanism 2 is θ, the deformation degree of the elastic member 701 in the first structure is S, and the range of the movable gap 14 in the second structure is C; in the third structure, the deformation degree of the elastic member 701 may be set to be one half S, and the range of the movable gap 14 is one half C, that is, the two components are overlapped with each other to realize the overall swing amplitude θ of the driving mechanism 2. The degree of deformation of the elastic member 701 and the extent of the movable gap 14 in the third structure can be set smaller than those in the first and second structures alone, which can lead to a longer service life and an improvement in performance stability and reliability. For example, under the condition of road condition jolting, the three phases of the structure can keep a stable working state more than other structures, and the possibility of faults and damage is reduced.

As a further description of the three embodiments of the present application, in one of the embodiments of the present application, as shown in FIGS. 7 and 8, slider 702 is mounted in cooperation with a floating groove 703 on mount 4. A mounting groove 8 communicating with the floating groove 703 is provided at the top end of the fixing frame 4.

It will be appreciated that the upper end of slider 702 is in a "T" configuration, and when the drive mechanism 2 is installed, slider 702 is first engaged with mounting groove 8 such that the horizontal portion of the top end of slider 702 extends out of mounting groove 8, and slider 702 is then moved along mounting groove 8 such that slider 702 is moved into snap-fit engagement with floating groove 703. In this case, although the engagement between the slider 702 and the floating groove 703 is facilitated by the engagement between the slider and the driving mechanism 2, the slider is easily displaced by the swinging action of the driving mechanism 2.

Therefore, in order to solve the above technical problem, as shown in fig. 7, a limiting assembly 9 may be provided between the slider 702 and the mount 4. It should be noted that when the slider 702 moves and cooperates with the floating groove 703, the slider 702 can be locked to the fixed frame 4 by the limiting component 9, so as to achieve stable cooperation between the driving mechanism 2 and the fixed frame 4, thereby ensuring stability and smooth operation of the whole device.

As shown in fig. 11, the limiting component 9 includes a limiting block 901 and a limiting groove 902, and of course, there are various mounting manners of the limiting block 901 and the limiting groove 902, including but not limited to the following two types:

Mode one: the stopper 901 is installed in the slider 702, and the stopper groove 902 is provided in the mount 4. Mode two: the stopper 901 is mounted on the fixed frame 4, and the stopper groove 902 is provided on the slider 702.

It will be appreciated that the manner of engagement of both stop 901 and stop slot 902 is synchronized with the engagement of both slider 702 and floating slot 703. That is, in the initial state of the mounting, as shown in fig. 12 (c), the stopper 901 and the stopper groove 902 are in a state of being offset from each other. When the slider 702 enters the floating groove 703 from the mounting groove 8, the stopper 901 is also moved toward the stopper groove 902 by the slider 702. When the slider 702 is engaged with the floating groove 703, the stopper 901 is also moved and caught in the stopper groove 902 to effect mounting locking of the slider 702, as shown in fig. 12 (d).

It should be noted that, as shown in fig. 10, the slider 702 may be integrally formed with the stopper 901, and the slider 702 is made of a plastic material, so that when the stopper 901 is not matched with the stopper 902, the stopper 901 is in an extrusion deformation state under the action of the fixing frame 4, and when the stopper 901 corresponds to the stopper 902, the stopper 901 loses extrusion action and returns to deform, so that the stopper 901 and the stopper 902 are in a limiting engagement.

Of course, the top end of the slider 702 and the fixing frame 4 are engaged with each other by a clamping fit, which is convenient for mounting and dismounting, and improves the dismounting efficiency. Therefore, based on the above embodiment, the bottom end of the slider 702, the driving mechanism 2 and the elastic member 701 can be installed in a similar manner to a snap fit manner, so as to facilitate subsequent disassembly and assembly.

Specifically, as shown in fig. 6 and 10, the slider 702 is in snap fit with the driving mechanism 2, and a snap gap 15 is formed between the slider 702 and the driving mechanism 2, the elastic member 701 is disposed in the snap gap 15, and the elastic member 701 is in butt fit with the slider 702 and the driving mechanism 2, so that the bottom end of the slider 702 is mounted between the elastic member 701 and the driving mechanism 2.

It should be noted that the slider 702 is now mounted to the drive mechanism 2 primarily by means of a snap fit, rather than a load bearing connection of the drive mechanism 2 entirely through the spring 701. Because the elastic member 701 is made of a flexible material, if the driving mechanism 2 is connected by the elastic member 701, the elastic member 701 is easily damaged due to irreversible deformation under the action force of the driving mechanism 2, and the service life is short. In this embodiment, the elastic member 701 mainly plays a role of filling connection, so that the stability of connection of the driving mechanism 2 and subsequent disassembly and assembly can be ensured on the premise of ensuring that the driving mechanism 2 can be movably connected, thereby prolonging the service life and reliability of the whole device.

As a further description of the above embodiments, the manner of engagement between slider 702 and drive mechanism 2 is as follows: the integrated molding of the bottom of slider 702 is provided with "worker" font structure's fixture block, and actuating mechanism 2's top is provided with draw-in groove 10, inwards extends in the both sides inner wall upper end of draw-in groove 10 and forms protruding portion 13, and then makes draw-in groove 10 be "T" font structure. The two sides of the elastic member 701 are recessed inwards to form a recess 11, and the middle part of the elastic member 701 is provided with a slot 12, as shown in fig. 10, which is a shape structure of the elastic member 701, for example, the elastic member 701 is integrally formed by rubber or silica gel.

It will be appreciated that when the slider 702, the elastic member 701 and the driving mechanism 2 are engaged, the elastic member 701 may be inserted into the slot 10, i.e. the protrusion 13 and the recess 11 are engaged in a plugging manner, and then the vertical section of the fixture block is inserted into the slot 12, and the fixture block may be inserted into the slot 10 at the same time, so as to achieve the plugging engagement between the three.

Therefore, as shown in fig. 6, the slider 702, the elastic member 701 and the clamping groove 10 are tightly clamped and limited, and under the action of the elastic member 701, the slider 702 is in flexible contact with the driving mechanism 2, so that abrasion between the slider 702 and the driving mechanism 2 can be greatly reduced, and the elastic member 701 can also play a role in damping and buffering, namely, when the automobile is jolt, the elastic member 701 can absorb impact energy through elastic deformation, so that stable connection is ensured, and meanwhile, vibration reduction and noise reduction are also realized.

Of course, in order to further improve the noise reduction effect, as shown in fig. 1 and 4, soundproof pieces (such as soundproof cotton 3) may be installed on both sides of the driving mechanism 2, and these soundproof pieces may be designed to not only effectively reduce the noise generated by the driving mechanism 2 during operation, but also improve the stability of the whole apparatus to some extent. Because the driving mechanism 2 is arranged in the backrest, the hard friction between the driving mechanism 2 and the backrest can be reduced through the arrangement of the sound insulation piece, and the backrest is further protected, so that the service life is prolonged.

In the embodiment of the present application, as shown in fig. 1 and 3, the headrest body 1 and the fixing frame 4 are matched in the following manner: a curved rod 5 is arranged at the bottom end of the headrest body 1, the bottom end of the curved rod 5 is connected with the output end of the driving mechanism 2, a sleeve 6 is fixedly arranged at the side part of the fixing frame 4, and the curved rod 5 is in sliding fit with the sleeve 6 so as to realize the curved sliding installation of the headrest body 1.

It will be appreciated that during the lifting of the curved bar 5 by the drive mechanism 2, the curved bar 5 may be moved upwards in a curved manner under the guiding action of the sleeve 6. Of course, in order to improve the stability to the headrest body 1, the curved rod 5 may be a pair and be in supporting connection with the headrest body 1, or the curved rod 5 may be in an integrated structure in the shape of 冂, so that the entire structure of the headrest body 1 is more stable.

As shown in fig. 4, the present application is not limited to the structural form of the driving mechanism 2, and a specific structure is provided below for reference: the driving mechanism 2 comprises a frame 204, a driving device 201, a screw rod 202 and a driving plate 203, wherein the frame 204 is installed at the bottom end of the fixed frame 4 through a floating assembly 7, the screw rod 202 is vertically and rotatably installed in the frame 204, the driving plate 203 is vertically and slidably installed on the frame 204 and matched with the screw rod 202, the driving plate 203 is detachably installed at the bottom end of the curved rod 5 (for example, bolt installation or snap ring fastening installation), and the driving device 201 is installed on the frame 204 and connected with the screw rod 202 through an output end. Of course, the driving device 201 is of common knowledge to those skilled in the art, and may be a motor, a rotary cylinder, a rotary hydraulic cylinder, or the like, and preferably a motor is used herein.

It can be understood that when the height of the headrest body 1 is adjusted, the motor is started to rotate forward, the motor drives the screw rod 202 to rotate, the screw rod 202 acts on the driving plate 203, and the driving plate 203 can drive the headrest body 1 to adjust in a lifting manner through the curved rod 5. In the same way, when the motor is reversed, the headrest body 1 can be adjusted in a descending manner.

Of course, in the driving mechanism 2, a hydraulic cylinder and a pneumatic cylinder may be used to drive the headrest body 1 to perform lifting adjustment. If the hydraulic cylinder is adopted, a matched hydraulic system is needed, and the cost is high and the maintenance cost is high for a single action; if the pneumatic cylinder is adopted, the transmission exhaust noise is large, and the sealing requirement is higher. For the above-mentioned matching mode of the motor screw 202, the motor screw has self-locking performance, that is, when the motor stops running, the headrest body 1 can stably maintain the adjusted position; meanwhile, the device is simple to maintain and low in noise, can work normally in high/low temperature, corrosion-resistant and explosion-resistant severe environments, and is preferably adopted.

In one embodiment of the present application, as shown in fig. 7 to 9, in order to further improve the stability and firmness of the cooperation between the driving mechanism 2 and the fixing frame 4, a pair of mounting structures related to the slider 702, the floating groove 703, the elastic member 701, the clamping groove 10 and the like are preferably adopted, and the mounting structures are arranged in a bilateral symmetry manner, so that the two sides of the top end of the driving mechanism 2 are matched with the fixing frame 4, thereby greatly improving the stability.

In this case, as shown in fig. 8, one mounting groove 8 may be provided, and it is known that the mounting grooves 8 are provided to enable the slider 702 to be mounted to the floating groove 703, and in the case where a pair of floating grooves 703 are provided, only one mounting groove 8 is required to enable the slider 702 to be mounted to the floating groove 703. Specifically, as shown in fig. 8, the left-side mounting groove 8 communicates with the floating groove 703, and the right-side floating groove 703 is located at the right end of the mount 4 and is in communication with the outside.

The working principle of the invention is as follows:

Firstly, the fixing frame 4 is fixedly arranged in the backrest, and the driving mechanism 2 is also positioned in the backrest; while the curved bar 5 extends out of the top end of the backrest; when the height of the headrest body 1 needs to be adjusted, the motor is started to rotate, the motor drives the screw rod 202 to rotate, the screw rod 202 acts on the driving plate 203, and the driving plate 203 can drive the headrest body 1 to perform curve type lifting adjustment through the curve type rod 5. At the same time, the frame 204 of the driving mechanism 2 swings with the entire driving mechanism 2 under the action of the floating groove 703, the floating block 702 and the elastic member 701, so as to match the curved lifting track of the headrest body 1.

When the headrest body 1 is folded, that is, when the headrest body 1 is adjusted to be contracted downward, the headrest body 1 moves downward in the direction of the backrest, and after moving downward to the lowest position, the headrest body 1 is tightly attached to the backrest, so that the headrest body 1 is not compressed by extrusion. Of course, the top end of the backrest can be provided with a groove body, after the headrest body 1 moves downwards to the lowest, the headrest body 1 can move downwards in a curve mode and enter the groove body to be hidden, at the moment, the headrest body 1 can be protected when the seat (backrest) is folded, the protection performance of the headrest body 1 is greatly improved, and the service life is further prolonged.

The foregoing has outlined the basic principles, features, and advantages of the present application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.

Claims

1. An electrically adjustable headrest, comprising:

A fixing frame;

The headrest body is arranged on the side part of the fixing frame in a curve sliding manner; and

The driving mechanism is arranged at the bottom end of the fixing frame through a floating assembly, and the output end of the driving mechanism is connected with the headrest body; the driving mechanism is suitable for driving the headrest body to perform curve lifting adjustment along the fixed frame, and at the moment, the driving mechanism is suitable for moving along the fixed frame under the action of the floating assembly so as to be matched with the curve track of the headrest body;

The floating assembly comprises an elastic piece, and the driving mechanism is arranged on the fixed frame through the elastic piece; when the headrest body is adjusted, the elastic piece is suitable for elastic deformation so that the driving mechanism moves along the fixing frame;

And/or the floating assembly comprises a floating block and a floating groove, wherein the floating block is arranged on the driving mechanism, and the floating groove is arranged on the fixed frame; the floating block is matched with the floating groove in a clamping way, and a movable gap is reserved between the floating block and the floating groove, so that the driving mechanism moves along the fixing frame.

2. The electrically adjustable headrest of claim 1, wherein: the top end of the fixing frame is provided with a mounting groove communicated with the floating groove; when the driving mechanism is installed, the floating block is suitable for being matched with the installation groove, then the floating block is suitable for moving along the installation groove until being in clamping fit with the floating groove, and the floating block is locked on the fixing frame through the limiting component.

3. The electrically adjustable headrest of claim 2, wherein: the limiting assembly comprises a limiting block and a limiting groove, the limiting block is arranged on the floating block, and the limiting groove is arranged on the fixing frame; or the limiting block is arranged on the fixed frame, and the limiting groove is formed in the floating block; the limiting block is matched with the limiting groove to realize locking limiting of the floating block.

4. The electrically adjustable headrest of claim 3, wherein: the floating block is matched with the driving mechanism in a clamping way, a clamping gap is reserved between the floating block and the driving mechanism, and the elastic piece is arranged in the clamping gap and is matched with the floating block and the driving mechanism in a propping way.

5. The electrically adjustable headrest of claim 4, wherein: the bottom end of the floating block is provided with a clamping block with an I-shaped structure, the top end of the driving mechanism is provided with clamping grooves, and the upper ends of the inner walls of the two sides of the clamping grooves extend inwards to form protruding parts, so that the clamping grooves are in a T-shaped structure; the two sides of the elastic piece are inwards recessed to form a recessed part, and a slot is formed in the middle of the elastic piece; the protruding portion is in plug-in fit with the recessed portion, the vertical section of the clamping block is in plug-in fit with the slot and the clamping groove, and the elastic piece is in butt fit with the outer portions of two sides of the clamping block.

6. The electrically adjustable headrest of claim 1, wherein: the bottom of headrest body installs curved pole, curved pole the bottom with actuating mechanism's output is connected, the sleeve is installed to the lateral part of mount, curved pole with telescopic sliding fit realizes the curved slidable mounting of headrest body.

7. The electrically adjustable headrest of claim 6, wherein: the driving mechanism comprises a frame, a driving device, a screw rod and a driving plate, wherein the frame is arranged at the bottom end of the fixed frame through a floating assembly, the screw rod is vertically rotatably arranged at the frame, the driving plate is vertically slidably arranged at the frame and matched with the screw rod, the driving plate is detachably arranged at the bottom end of the curved rod, the driving device is arranged at the frame and connected with the screw rod through an output end, and the screw rod drives the driving plate to lift and move under the driving of the driving device.