KR20150002654U

KR20150002654U - Device for vibration reduction of headrest

Info

Publication number: KR20150002654U
Application number: KR2020130010857U
Authority: KR
Inventors: 정희용
Original assignee: 현대다이모스(주)
Priority date: 2013-12-29
Filing date: 2013-12-29
Publication date: 2015-07-08

Abstract

In the present invention, a vibration absorbing member for attenuating a traveling vibration is provided on a headrest, and a traveling vibration generated at the time of traveling through the vibration absorbing member is attenuated to prevent the headrest from being shaken by vibration.
Thereby, a headrest vibration reduction device capable of stably supporting a head portion of a passenger seated on a seat, and reducing a vibration of a monitor mounted on the rear surface of the headrest, thereby eliminating the inconvenience of a passenger.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a head rest vibration reduction apparatus,

The present invention relates to a headrest vibration reduction device for attenuating a traveling vibration transmitted to a headrest mounted on a seat.

BACKGROUND ART [0002] Generally, a vehicle is provided with a seat for an occupant to be seated, and a seat is provided with a seat back pad for supporting a lower body of a passenger, a seat back for supporting the upper body, and a headrest for supporting the rear head. Such a seat absorbs shocks generated during operation, provides a comfortable seating feeling, and can increase the commerciality of the vehicle depending on design and sheet material.

Particularly, the head rest provided at the top of the seat back to adjust the up and down height is an important component for safely protecting the neck portion while supporting the back of the passenger.

1 shows a seat back 30 provided with a headrest 10. In general, a headrest 10 provided on a headrest guide 20 is provided with a stay rod 12 extending downward, 12 are formed with fixing grooves 14.

The headrest guide 20 into which the headrest 10 is inserted is embedded in the seatback pad of the seatback 30 at the upper end of the seatback 30 and fixed to the seatback frame. P is inserted into the fixing groove 14 of the stay rod 12 of the headrest 10 so that the height of the headrest 10 can be adjusted in consideration of the body shape of the driver.

The latest mass produced luxury car is equipped with a monitor on the back of the seat for convenience of passengers. Generally, when the vehicle is running, traveling vibration occurs. When a natural frequency of the vehicle and a natural frequency of the seat are close to each other and a resonance phenomenon occurs, the monitor mounted on the rear of the seat wobbles to watch the monitor Discomfort is provided.

In particular, the monitor mounted on the rear side of the seat is mounted on the headrest of most of the seat. In the case of the headrest, the monitor is installed at the uppermost position of the seatback, and the vibration due to the resonance phenomenon is increased.

Therefore, there is a technique in which vibration of the headrest is reduced to stably support the head portion of the occupant seated on the seat, and the monitor device mounted on the rear side is shaken by vibration, thereby eliminating the inconvenience of the occupant need.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

Korean Registered Patent No. 20-0256470 (Nov. 23, 2001)

The present invention has been proposed in order to solve such a problem, and it is an object of the present invention to stably support the head portion of a passenger seated on a seat by damping transmission of traveling vibration generated in a vehicle running on the headrest, And it is an object of the present invention to provide a headrest vibration reduction device capable of reducing the vibration and thereby eliminating the inconvenience of the passengers.

According to an aspect of the present invention, there is provided a headrest vibration reduction apparatus comprising: a headrest frame installed inside a headrest provided at an upper end of a seatback, supporting the headrest in a seatback and extending downward to be assembled to a seatback; And a vibration absorbing member provided at least on the headrest frame for absorbing vibration generated when the vehicle is traveling.

The headrest frame is constituted by a stab bar fixed in the headrest and a stay rod extending downward from both ends of the stab bar, and the vibration absorbing member can be installed on the stay bar and the stay rod.

The vibration absorbing member may be composed of a horizontal vibration absorbing member provided on the stay bar and a vertical vibration absorbing member provided on an extended end portion of the stay rod.

The vibration absorbing member may be configured to be capable of varying the vibration frequency so as to attenuate vibrations in various frequency range bands.

And a control unit for variably controlling the vibration frequency of the vibration absorbing member, wherein the control unit includes: a vibration sensor for detecting a vibration volume generated when the vehicle is traveling, The vibration frequency of the vibration absorbing member can be variably controlled when the vibration amount detected by the vibration detection unit reaches the preliminarily stored limit vibration value.

The vibration sensing unit may be a vibration sensor or an acceleration sensor.

The seat back is provided with a headrest guide into which the headrest frame is inserted, and the vibration absorbing member can be installed in the headrest guide of the seatback.

According to the headrest vibration reduction apparatus having the above-described structure, the headrest is provided with the vibration absorbing member for attenuating the traveling vibration, the traveling vibration generated at the time of traveling through the vibration absorbing member is damped, .

It is therefore an object of the present invention to provide a headrest vibration reduction device capable of stably supporting a head portion of a passenger seated on a seat and reducing the vibration of a monitor mounted on the rear surface of the headrest, have.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a view of a seat back provided with a headrest;
2 is a view showing a headrest vibration reduction apparatus according to an embodiment of the present invention;
3 is a view showing a control of a headrest vibration reduction apparatus according to an embodiment of the present invention.

Hereinafter, a headrest vibration reduction apparatus according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a view showing a seat back provided with a headrest, FIG. 2 is a view showing a headrest vibration reduction device according to an embodiment of the present invention, and FIG. 3 is a schematic view of a headrest vibration reduction device Fig.

The headrest vibration reduction apparatus of the present invention according to the present invention is provided in a headrest 10 provided at an upper end of a seatback and supports a headrest 10 in a seatback, A frame 100; And a vibration absorbing member (200) provided at least on the headrest frame (100) to absorb vibration generated when the vehicle is traveling.

The present invention is intended to reduce the traveling vibration transmitted to the headrest 10 through the headrest frame 100 and the vibration absorbing member 200 mounted thereon. Of course, it is possible to attenuate the vibration transmitted to the headrest 10 by attenuating the traveling vibration transmitted to the seatback itself. However, since the seatback itself has a large size and a large number of additional devices are installed, do. That is, in order to suppress the vibration transmitted to the seat itself, a vibration-reducing device having a complicated structure and having a large volume should be applied.

In the present invention, the structure for attenuating vibration is not complicated and the vibration transmitted to the headrest 10 of the seatback is damped. The vibration of the headrest 10 is locally damped, There is a high advantage.

Particularly, when the monitor is mounted on the rear surface of the headrest 10, if the vehicle running vibration is transmitted to the headrest 10 and the monitor is shaken, the inconvenience may be caused to cause dizziness of the passengers watching the monitor.

Therefore, in the present invention, the vibration absorbing member 200 is provided in the headrest frame 100 supporting the headrest 10 provided at the upper end of the seatback to attenuate the vibration transmitted to the headrest 10, .

The headrest frame 100 includes a stay bar 120 fixed in the headrest 10 and a stay rod 140 extending downward from both ends of the stay bar 120. [ And the vibration absorbing member 200 may be installed on the stay bar 120 and the stay rod 140. [

Here, the stay bar 120 is installed inside the headrest 10 to fix the headrest 10 when assembling the headrest 10 and the seatback, and the stay rod 140 is moved downward from the stay bar 120 So that the headrest 10 is slidable in the vertical direction at the upper end of the seatback.

The vibration absorbing member 200 is provided on the stay bar 120 and the stay rod 140 of the headrest frame 100 so that the vibration transmitted to the headrest 10 is attenuated. That is, the vibration absorbing member 200 is provided on the stay bar 120 and the stay rod 140 of the headrest 10 so as to attenuate vibrations up and down the headrest 10, So that the vibration damping effect can be generated.

The vibration absorbing member 200 may be composed of a horizontal vibration absorbing member 200a provided on the stay bar 120 and a vertical vibration absorbing member 200b provided on an extended end of the stay rod 140 have.

As described above, the vibration absorbing member 200 can be composed of the horizontal vibration absorbing member 200a and the vertical vibration absorbing member 200b, so that vibrations generated in the headrest 10 in the up, down, left, and right directions can be absorbed. Of course, the vibration transmitted to the headrest 10 can be attenuated by only one vibration absorbing member 200, but at least two or more vibration absorbing members 200 may be provided, so that vibration in the horizontal and vertical directions is attenuated So that more efficient vibration damping can be achieved.

The vibration absorbing member 200 is limited to be provided at the end portion of the stay bar 120 and the stay rod 140 of the headrest 10 with respect to the mounting position of the vibration absorbing member 200 of the present invention However, this can be changed to an appropriate position according to the shape of the headrest frame 100 and the transmitted vibration. Those skilled in the art can fully derive this from a simple experiment, and are not limited to the installation position of the vibration absorbing member 200.

Meanwhile, the vibration-absorbing member 200 may be configured to be capable of varying the vibration frequency so as to attenuate vibrations in various frequency band regions.

A detailed description of the vibration absorbing member 200 will be omitted because it is variously known in the art regarding a damping device that actively absorbs natural light by actively varying the vibration frequency with respect to the natural frequency of a specific object.

However, the vibration-absorbing member 200 applied to the present invention is configured to vary the vibration frequency under the control of the control unit 400 to be described later. The vibration-absorbing member 200 includes a means for changing the vibration frequency of the damper and the damper, and a control unit 400 for controlling the vibration frequency to be changed at the set frequency. Are already known, and further explanation of the structure and operation will be omitted.

A vibration sensor 300 is mounted on the headrest 10 to sense a vibration amount generated when the vehicle is traveling. The vibration sensor 300 also stores a limit vibration value and variably controls the vibration frequency of the vibration- The control unit 400 controls the vibration frequency of the vibration absorbing member 200 to be variable when the amount of vibration sensed by the vibration sensing unit 300 reaches a preliminarily stored limit vibration value can do.

Here, the vibration sensing unit 300 may include a vibration sensor or an acceleration sensor, and may sense the vibration transmitted to the headrest 10 to measure the vibration value.

Thus, information on the amount of vibration sensed through the vibration sensing unit 300 is transmitted to the control unit 400. [ The control unit 400 stores the limit vibration value derived from the experimental values of the headrest 10 and the amount of vibration transmitted to the vehicle at initial designing. This limit vibration value is a vibration value that causes the headrest 10 to be shaken by the transmitted vibration to cause inconvenience to the occupant, and can be applied differently according to the vehicle and headrest specifications.

The control unit 400 receives the vibration value measured through the vibration detection unit 300 and compares the vibration value with the limit vibration value, and when the vibration value measured through the vibration detection unit 300 is larger than the limit vibration value The vibration frequency of the vibration absorbing member 200 is varied to an optimum value at which the vibration of the headrest 10 can be attenuated by controlling the vibration absorbing member 200. [

Here, the optimum value of the vibration-absorbing member 200 is a value derived according to the resonance frequency of the various region band through the experimental value, and is stored in the control unit 400 in advance.

In this way, the amount of vibration transmitted to the headrest 10 through the vibration sensing unit 300 is sensed, and when the control unit 400 receives the sensed vibration amount, the vibration attenuation operation of the headrest 10 must be performed Or not. When the control unit 400 judges that the vibration damping operation of the headrest 10 should be performed, the vibration of the headrest 10 can be efficiently controlled by varying the vibration- Can be attenuated.

Meanwhile, the seat back may be provided with a headrest guide 20 into which the headrest frame 100 is inserted, and the vibration absorbing member 200 may be installed in the headrest guide 20 of the seatback.

Generally, the headrest 10 is installed at the top of the seatback through the headrest guide 20 when installed in the seatback frame. That is, the stay rod 140 of the headrest frame 100 is inserted downwardly from above into the headrest guide 20 installed and fixed to the seatback frame, thereby connecting the headrest 10 to the seatback.

As described above, the headrest frame 100 is connected to the headrest guide 20, and vibration due to traveling is transmitted through the headrest guide. Accordingly, the auxiliary vibration absorbing member 200c is provided in the headrest guide 20 to primarily attenuate the vibration, and the vibration is additionally attenuated by the vibration absorbing member 200 provided in the headrest frame 100 So that efficient vibration damping can be achieved.

The headrest vibration reduction apparatus constructed as described above is provided with the vibration absorbing member 200 for attenuating the traveling vibration transmitted to the headrest so as to prevent the headrest 10 from being shaken by vibration.

In particular, there is no need for a device that is large in size and requires a large number of additional devices to attenuate the vibration of the seat back by locally vibrating damping only the headrest 10, instead of attenuating the vibration of the entire seatback.

Therefore, the head portion of the occupant sitting on the seat can be stably supported, and when the monitor mounted on the rear surface of the headrest 10 is mounted, the shake of the monitor due to the vibration can be reduced, .

Although the present invention has been shown and described with respect to specific embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit of the present invention, Will be apparent to those of ordinary skill in the art.

100: headrest frame 120: stay bar
140: stay rod 200: vibration absorbing member
300: vibration detection unit 400: control unit

Claims

A headrest frame provided inside the headrest provided at the upper end of the seatback and supporting the headrest in the seatback and extending downward to be assembled to the seatback; And
And a vibration absorbing member provided at least on the headrest frame for absorbing vibration generated when the vehicle is traveling.

The method according to claim 1,
Wherein the headrest frame comprises a stab bar fixed in the headrest and a stay rod extending downward from both ends of the stab bar,
Wherein the vibration absorbing member is provided on the stay bar and the stay rod.

The method of claim 2,
Wherein the vibration absorbing member comprises a horizontal vibration absorbing member provided on the stay bar and a vertical vibration absorbing member provided on an extended end portion of the stay rod.

The method of claim 2,
Wherein the vibration absorbing member is configured to be capable of varying a vibration frequency so as to attenuate vibrations in various frequency range bands.

The method of claim 4,
A vibration sensor installed on the headrest for detecting a vibration amount generated when the vehicle is traveling;
And a control unit for variably controlling the vibration frequency of the vibration absorbing member,
Wherein the control unit variably controls the vibration frequency of the vibration absorbing member when the vibration volume detected by the vibration detection unit reaches a pre-stored limit vibration value.

The method of claim 5,
Wherein the vibration sensing unit comprises a vibration sensor or an acceleration sensor.

The method according to claim 1,
Wherein the seat back is provided with a headrest guide into which the headrest frame is inserted, and the vibration absorbing member is provided on the headrest guide of the seatback.