WO2013147454A1

WO2013147454A1 - Vehicle headrest

Info

Publication number: WO2013147454A1
Application number: PCT/KR2013/002325
Authority: WO
Inventors: 허치영; 허인영
Original assignee: Heo Chi Yeong; Heo In Young
Priority date: 2012-03-27
Filing date: 2013-03-21
Publication date: 2013-10-03
Also published as: KR101300484B1

Abstract

The present invention relates to a vehicle headrest comprising: a raising support installed on the top end of a seat backrest to enable a raising movement; a first bar fixed to the raising support and extending in a widthwise direction; a moving frame installed on the first bar so as to be capable of rotational movement around the perimeter of the first bar; a main body surrounding the moving frame and moving together with the moving frame; an automatic power transmitting unit installed inside the main body and driving the rotational movement of the moving frame with respect to the first bar; and a manual control unit coupled to the moving frame to be capable of moving along the first bar in a lengthwise direction. The automatic power transmitting unit includes: a fixed gear installed to not rotate on the first bar; a first motor fixed and installed inside the main body; and a worm driven by the first motor and engaged with the fixed gear. The manual control unit is configured to move the fixed gear along the lengthwise direction of the first bar. According to this configuration, a push button of the manual control unit is pressed to push the fixed gear and separate the fixed gear from the worm, so that a passenger can easily perform manual control even with little exertion.

Description

Car headrests

The present invention relates to a head restraint for a vehicle, by automatically optimizing the distance between the occupant's back and the head of the vehicle while driving, in the event of a sudden collision with the front or rear car, the head and head of the occupant can be safely protected. The present invention relates to a vehicle headrest that can be resolved so that a driver or a passenger can ride comfortably.

In general, a headrest is mounted on the upper seat of the vehicle corresponding to the occupant's head to comfort the occupant and prevents the head of the occupant from being bent in the event of a vehicle crash to prevent fatal injuries that may be inflicted on the neck. Device.

The headrests developed so far and used in finished cars can be classified into three categories: tilting, active and folding headrests.

The tilting headrest had a function of manually adjusting the spacing to three stages, but there was a problem that a blind spot caused by the headrest occurred.

In addition, the active headrest has a function of detecting vibration in a crash accident or suddenly advancing at the moment of an accident with a mechanical structure to support the neck, but this also caused a blind spot due to the headrest.

In addition, the folding headrest has a function for eliminating blind spots due to the headrest as a function that can be flipped 90 degrees forward or backward, but was disadvantageous due to manual operation.

Accordingly, in the case of blind spots, the front passenger's head restraint may be left out or the seat may be leaned forward to secure the front view of the rear seat occupant.

In addition, three people are required to ride in the rear seat, but the rear view is blocked by the headrest when checking the rear car with a room mirror, and the headrest is not installed in the middle rear seat. .

To solve this problem, the height and distance of the headrest can be adjusted automatically and manually according to the body type of the recent occupant, and it is leaned forward 90 degrees, and when the passenger rides, it is automatically set up vertically to solve the blind spot caused by the headrest. A multifunctional headrest which can be developed is developed.

An example of the technology for the headrest that can automatically adjust the height and spacing as described above is disclosed in Republic of Korea Patent Publication No. 10-2011-0032719 (hereinafter referred to as "separate technology 1").

However, the headrest disclosed in the prior art 1 by pushing the headrest body to the side during manual operation to separate the fixed gear and worm gear is difficult to operate due to the body of the main body and difficult to manufacture the manual control panel as well as on the top of the seat back The opening of the moving part of the elevating support portion, which is capable of elevating movement, has to be widened, so that it is difficult to commercialize such that there is an unsatisfactory problem.

The present invention has been made to solve the above-mentioned problems, an object of the present invention is to provide a vehicle headrest that can be easily operated by the occupant by pushing the pushbutton and the fixed gear to separate from the worm.

In order to achieve the above object, the vehicle headrest according to the present invention,

An elevating support unit installed on the upper and lower back of the seat to enable elevating movement;

A first bar fixed to the lifting support and extending in a horizontal direction;

A moving frame installed on the first bar to enable a rotational movement along the circumference of the first bar;

A main body surrounding the moving frame and moving together with the moving frame;

An automatic power transmission unit installed inside the main body to drive a rotational movement of the moving frame with respect to the first bar; And,

Includes a manual operation unit coupled to the movable frame to be movable along the longitudinal direction of the first bar,

The automatic power transmission unit includes a fixed gear installed so as not to rotate in the first bar, a first motor fixedly installed in the main body, a worm driven by the first motor and engaged with the fixed gear,

The manual operation unit is configured to move the fixed gear along the longitudinal direction of the first bar.

The manual operation unit,

A push rod which is bifurcated into the moving frame and contacts the fixed gear, and a push button installed at one end of the push rod, and pushes the fixed gear while the push rod moves to the fixed gear. It characterized in that it is configured to separate from the worm.

One side of the push rod side of the fixed gear is formed with a protrusion formed with a locking groove is formed, and one end of the push rod is characterized in that the hook portion is caught to the locking groove is formed.

A pair of side supports are installed at both ends of the first bar to allow relative rotation with respect to the first bar, and the push rod penetrates the side supports from the outside.

A fixed plate is connected between the pair of side supports.

A circumference of the push rod is characterized in that the spring is connected between the side support.

According to the present invention of the configuration as described above, by pressing the push button of the manual operation unit to push the fixed gear to separate from the worm is obtained the effect that the passenger can easily operate manually even with a small force.

Moreover, according to this invention, the effect which becomes simpler in the structure of a manual operation part can be acquired.

In addition, according to the present invention, it is possible to narrow the width of the opening of the moving portion of the elevating support portion, which is installed to be capable of elevating movement at the upper end of the seat back, thereby obtaining an aesthetically improved effect.

1 is a perspective view showing a seat equipped with a vehicle headrest according to the present invention.

Figure 2 is a front sectional view showing the structure of the headrest for a vehicle according to the present invention.

Figure 3 is a side cross-sectional view showing the structure of a headrest for a vehicle according to the present invention.

4 is a perspective view of a guide rail included in a vehicle headrest according to the present invention.

5 is an operation of the manual operation unit included in the headrest for a vehicle according to the present invention.

Figure 6 is a side cross-sectional view showing the operation sequence of the passenger seat headrest according to the present invention.

Figure 7 is a side cross-sectional view showing the operation sequence of the rear seat headrest according to the present invention.

Figure 8 is a side cross-sectional view showing the operation sequence of the driver's headrest in accordance with the present invention.

9 is a side cross-sectional view showing a configuration in which the projection and the guide rail of the moving frame are caught by each other in the headrest according to the present invention.

10 is a side sectional view showing a structure of a vehicle headrest according to a modified embodiment of the present invention.

FIG. 11 is an operation diagram of a manual operation unit included in the vehicle headrest of FIG. 10.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a seat is equipped with a vehicle headrest according to the invention, Figure 2 is a front sectional view showing the structure of the vehicle headrest according to the invention, Figure 3 is a structure of the vehicle headrest according to the invention 4 is a perspective view of a guide rail included in a vehicle headrest according to the present invention, FIG. 5 is an operation view of a manual operation unit included in the vehicle headrest according to the present invention, and FIG. Fig. 7 is a side sectional view showing an operation sequence of the passenger seat headrest according to the present invention, and Fig. 7 is a side sectional view showing an operation sequence of the rear seat headrest according to the present invention. 9 illustrates a configuration in which the projection and the guide rail of the moving frame are caught by each other in the headrest according to the present invention. A cross-sectional side view, and FIG. 10 is a side sectional view showing a structure of a vehicle headrest according to a modified embodiment of the present invention, Figure 11 is a diagram of a manually operated control panel included in the automotive headrest of Fig.

As shown in Figures 1 to 3, the vehicle headrest 1000 according to the present invention is fixed to the lifting support 100, the lifting support 100, which is installed to enable the lifting movement on the upper back of the seat back and horizontal Moving frame installed in the first bar 200 to allow both the first bar 200 extending in the direction, the linear movement in the front-rear direction of the vehicle, and the rotational movement along the circumference of the first bar 200 ( 300, a body 400 surrounding the moving frame 300 and moving together with the moving frame 300, installed in the main body 400, the moving frame 300 with respect to the first bar 200. Automatic power transmission unit 500 for driving the linear motion and rotational movement of the sensor, installed in the main body 400, the sensor 600 for detecting the position of the head of the occupant, and receiving a detection signal from the sensor 600 It includes a control unit 700 for transmitting a drive signal to the automatic power transmission unit 500. The.

According to this configuration, while detecting the occupant's head, it is possible to determine the optimal position of the body 400 with respect to the occupant's head while sequentially performing forward movement and rotational movement of the main body 400.

Specifically, the automatic power transmission unit 500, the fixed gear 510 is installed in the moving frame 300 is installed so as not to rotate on the first bar 200, the inside of the main body 400 A first motor 520 is fixedly installed, and a worm 530 driven by the first motor 520.

In the present exemplary embodiment, the first bar 200 has a square pillar-shaped cross section so that the fixed gear 510 does not rotate with respect to the first bar 200, and the first bar ( A coupling hole 515 having a shape complementary to that of 200 is formed. However, the cross section of the first bar 200 may have various shapes such as another polygonal column or a tooth.

As the worm 530 is engaged with the fixed gear 510 and is relatively moved by driving the first motor 520, the moving frame 300 moves linearly in the front-rear direction of the vehicle and the first bar. Rotation along the perimeter of 200 is enabled.

In particular, as shown in FIG. 3, the fixed gear 510 is connected to an arc-shaped tooth 511 and a straight tooth 512 connected to one end of the arc-shaped tooth 511 and facing the front-back direction of the vehicle. As the worm 530 moves along the arc-shaped tooth 511 and the straight tooth 512 of the fixed gear 510, the linear movement in the front-rear direction of the vehicle and the first bar 200 are performed. Rotational movement along the circumference is possible.

The moving frame 300 preferably has a cross-sectional shape of the letter 'c' so that the fixed gear 510, the worm 530, and the first motor 520 are accommodated therein.

In this case, a through hole 310 of a long hole through which the first bar 200 passes is formed at both flanges facing the moving frame 300, and the through hole 310 is a linear moving part 311. It is made of a structure in which the arc-shaped rotational moving portion 312 is formed at both ends.

In addition, a protrusion 320 protruding to the outside of the moving frame 300 along the longitudinal direction of the first bar 200 is formed around the through hole 310 of the long hole.

Accordingly, the first bar 200 is naturally guided in the through hole 310 when the moving frame 300 is linearly moved or rotated.

In addition, a guide rail 250 for guiding the protrusion 320 is fixed to the first bar 200.

As shown in FIG. 4, the guide rail 250 includes a plate 251 and a limiting protrusion 252 protruding from one surface of the plate 251, wherein the limiting protrusion 252 is the movable frame. The circular arc 252b is connected to one end of the straight line 252a so as to partially surround the protrusion 320 of the 300.

In this case, it is preferable that the plate 251 of the guide rail 250 is formed with an arc-shaped guide groove 253 centering on the first bar 200.

The arc-shaped guide groove 253 is a component to guide and limit the push rod of the manual operation unit to be described later.

A spring 330 is connected between the moving frame 300 and the first bar 200, so that the weight of the main body 400 is elastically supported when the main body 400 is folded forward or backward. The load on the first motor 520 may be reduced.

In the drawing, a bevel gear 540 is installed between the first motor 520 and the worm 530 to switch the power transmission direction, but the worm 530 may be directly connected to the first motor 520. .

On the other hand, as shown in Figure 1, when looking at the main body 400 in plan view, the main body 400 is formed with a concave groove to surround a part of the occipital part of the occupant, the sensor 600 is the groove It is preferable that the photo sensor 610 is installed on both sides or any one side of the.

However, the sensor 600 does not need to be limited to the photosensor, and any sensor including a proximity sensor may be used as long as it is a sensor capable of detecting the position of the occupant's head.

In addition, a rotation control switch 620 is formed on the front surface of the main body 400, so that the switching signal of the rotation control switch 620 is transmitted to the first motor 520 through the control unit 700. can do.

In addition, the lifting support 100 is coupled to the lifting device 800, the lifting device 800 is a support bracket 810 for fixing the lifting support 100, the support bracket 810 and the feed screw It includes a conveying screw 820 and a second motor 830 connected to the conveying screw 820.

A pair of side supports 410 are installed at both ends of the first bar 200 in the main body 400 to allow relative rotation with respect to the first bar 200, respectively. The fixing plate 420 is connected between the support 410 is provided.

On the other hand, as shown in Figure 2 and 5, the fixed gear 510 is coupled to be slidable along the longitudinal direction with respect to the first bar 200, the moving frame 300 is a manual operation unit ( 900 is movably coupled, the manual operation unit 900 is configured to push the fixed gear 510 while moving to separate the fixed gear 510 from the worm 530, the side support 410 ) And the spring 930 is connected between the manual operation unit 900.

Since the power transmission of the automatic power transmission unit 500 is stopped by the manual operation unit 900, it is possible to freely adjust the main body 400 manually.

The manual operation unit 900, the push rod penetrating the side support 410 from the outside and branched into two branches through the projection 320 of the moving frame 300 through the moving frame 300 ( 910 and a push button 920 installed at one end of the push rod 910.

In the case of manually manipulating the position of the main body 400, by pressing the push button 920, the fixed gear 510 is slid along the first bar 200 by the push rod 910 to be separated from the worm 530. The main body can then be moved.

Hereinafter, the structure of the present invention will be described in more detail with reference to FIGS. 1 to 5.

First, the main body 400 generally has a structure in which a shock absorbing member 440 is formed on an outer surface of a housing 430 for accommodating the

various components

200, 300, 500, and 600 described above. to be. However, other configurations may be adopted.

The body 400 is formed in a suitable size and design that can support or lean the head of the vehicle occupant is mounted on the seat back of the vehicle.

The lifting device 800 is a conventional mechanical device using a second motor 830, a transfer screw 820 rotated by the second motor 830, a bracket for fixing the transfer screw 820, etc. Apply.

At this time, the main body 400 is connected via the elevating device 800 and the elevating support part 100, and the elevating device 800 is elevated by the operation of the elevating device 800.

The lifting support part 100 is installed on the upper back of the seat.

Here, the main body 400 is further attached to the sensor for detecting the head position, such as a photo sensor (not shown), the elevating device by the control unit 700 so that the main body 400 is located at an optimal height with respect to the head height of the occupant The lifting movement of 800 can be controlled.

The elevating movement of the main body 400 by the elevating device 800 and the forward movement and the up and down rotational movement of the main body 400 by the automatic power transmission unit 500 may be performed simultaneously or sequentially.

As shown in FIG. 2, the moving frame 300 is disposed at the center of the inner space of the main body 400, but may be disposed at the left and right sides of the inner space of the main body 400, respectively. One motor can be operated by combining power with a spur gear and a bevel gear.

In addition, the moving frame 300 has a 'c' cross-sectional shape to accommodate the fixed gear 510, as described above, the through hole of the long hole through which the first bar 200 passes through both flanges facing each other. 310 is formed.

The first bar 200 extends in the horizontal direction of the vehicle seat through the through hole 310 and is fixed to the lifting support 110 by welding or the like.

The through hole 310 has a configuration in which an arc-shaped rotary moving part 312 is formed at both ends with a linear moving part 311 interposed therebetween, and the first bar (circle) is formed around the through hole 310. A protrusion 320 protruding to the outside of the moving frame 300 is formed along the length direction of the 200.

In addition, a guide rail 250 for guiding the protrusion 320 is fixed to the first bar 200 by welding or the like.

The guide rail 250 includes a plate 251 and a limiting protrusion 252 protruding from one surface of the plate 251, wherein the limiting protrusion 252 is a protrusion 320 of the moving frame 300. The circular arc 252b is connected to one end of the straight line 252a so as to partially enclose the worm, so that the worm 530 rotates along the teeth of the fixed gear 510 to simultaneously rotate the moving frame 300. When the projection 320 is caught to limit the rotation.

The fixed gear 510 is slidably coupled along the longitudinal direction of the first bar 200, and the manual operation unit 900 is movably coupled to the moving frame 300, thereby allowing the manual operation unit ( When the fixed gear 510 is pushed while the 900 moves in the horizontal direction of the vehicle seat, the fixed gear 510 may be separated from the worm 530.

The manual manipulation unit 900 penetrates the side support 410 from the outside and is divided into two branches with the protrusion 320 of the moving frame 300 interposed therebetween and push rod 910 passing through the moving frame 300. And a push button 920 installed at one end of the push rod 910.

In addition, a spring 930 is connected between the side support 410 and the manual operation unit 900, when the force to press the push button 920 to remove the position of the fixed gear 510 worm ( 530 can be restored to the engaged position to enable automatic power transfer.

A protrusion 514 having a locking groove 513 is protruded from one side of the push rod 910 side of the fixed gear 510, and one end of the push rod 910 is caught by the locking groove 513. Since the hook portion 915 is formed, the fixed gear 510 is movable together with the movement of the push rod 910.

In addition, the plate 251 of the guide rail 250 is formed with an arc-shaped guide groove 253 centering on the first bar 200, the movement of the push rod 910 of the manual operation unit 900 Guided and excessive movement is limited.

In the embodiment of the present invention, the automatic operation unit 300 is configured to include a first motor 520, the bevel gear 540 and the worm 530, the moving frame 300 to the motor bracket 550 The first motor 520 is mounted, and the bevel gear 540 and the worm 530 are sequentially arranged to receive rotational power of the first motor 520.

Meanwhile, the geared motor may be applied to the first motor 520 to have sufficient torque.

The bevel gear 540 is a first bevel gear 541 connected to the rotation axis of the first motor 520, and teeth coupled to the first bevel gear 541 to transfer the rotational power of the first bevel gear 541. The second bevel gear 542 converts the direction by 90 degrees. The second bevel gear 542 is connected to the worm shaft 531.

As a result, the worm 530 is connected to the rotating shaft of the second bevel gear 542 and is mounted to engage with the fixed gear 510 installed so as not to rotate on the first bar 200.

That is, during operation of the first motor 520, the power is transmitted to the worm 530 through the bevel gear 540, and the worm 530 moves along the fixed gear 510 fixed in the rotational direction. .

In particular, the fixed gear 510 is composed of an arc-shaped tooth 511 and a straight tooth 512 connected to one end of the arc-shaped tooth 511, the vehicle front and rear direction movement and front and rear direction of the main body 400 Rotation is possible.

In addition, the bevel gear 540 may be omitted so that the rotational force of the first motor 520 is directly transmitted to the worm 530. In this case, the mounting position of the first motor 520 is changed to move the frame 300. It may be installed on the inside of the may be installed on the outside of the moving frame.

At this time, as shown in Figure 9, the main body 400 is in contact with the guide rail 250 and the projection 320 of the moving frame 300 in the upper and lower maximum rotation position (Over Current Relay (OCR)) The rotation is automatically stopped by That is, when the moving frame 300 rotates around the first bar 200 while the through-hole 310 of the moving frame 300 is inserted into the first bar 200, the moving frame 300. When the protrusion 320 of the 300 is caught by the limiting protrusion 252 of the guide rail 250 and the first motor 520 is overloaded, the power of the first motor 520 is automatically shut off so that the rotation is stopped. can do.

However, the present invention is not limited thereto, and a rotation of the main body 400 may be controlled by mounting a photosensor inside the moving frame 300 or on one side of the fixed gear 510 so as to detect the maximum rotational position of the main body 400. Alternatively, the rotation of the main body 400 may be controlled by sensing the time.

In an embodiment of the present invention, the main body 400 is formed with a concave groove so as to surround a part of the occipital head of the occupant, and at the front edge of both or one side of the groove to detect the occipital head of the occupant (first side) The photosensor 610 is installed to adjust the rotational force of the 520 to adjust the distance between the front of the body 400 and the occipital head of the occupant.

The photosensor 610 includes a light emitting unit 611 and a light receiving unit 612, the light emitting unit 611 is provided on one side of the main body 400, the light receiving unit 612 is a light emitting unit ( 611 is provided on the other side of the main body 400 to correspond to the light emitting unit so as to receive the light emitted from the 611.

Also available is a light-receiving photoelectric sensor.

Of course, the photosensor 610 may be replaced by an infrared or laser sensor or other switch sensor.

On the other hand, in the case of the passenger seat, the main body 400 is kept in a forward bowed state before the occupant is seated in the vehicle seat so as not to obscure the view of the rear seat occupant, and when the seat is detected or the door of the vehicle is opened, Rotate upward by the rotation of the 520 to move backward in a substantially vertical state, and then through the detection and operation of the photosensor 610 to move forward only up to a certain interval and to rotate down only to a certain angle forward by the occupant Head and spacing are adjustable.

According to this configuration, the headrest 1000 can be adjusted by dividing the interval between the occupant's head and the headrest 1000 in stages in a vertical position.

For example, when detecting the occupant's head position by dividing into four stages, the headrest 1000 first moves forward one step forward toward the occupant's head and then the photosensor detects the occupant's back for a predetermined time.

After the first step, the main body 400 is rotated by a predetermined angle and the vehicle is stopped again for a predetermined time to perform the second step of detecting the occupant's back, and then rotates to the third and fourth steps again. In other words, the rotation of the headrest 1000 is to rotate in a stepwise discontinuous operation according to the set time (seconds).

The front surface of the main body 400 has a rotation control switch 620 is formed to protrude, if the need arises to rotate the main body 400 again at a predetermined angle and interval, as required by the occupant, the occupant to the back of the head The first motor 520 may be reversely rotated by pressing the rotation control switch 620.

That is, the switching signal of the rotation control switch 620 is transmitted to the first motor 520, wherein the first motor 520 received the signal of the rotation control switch 620 through the control unit 700 is the While the signal is input, the main body 400 is rotated upward by continuously rotating in the reverse direction.

Here, for example, when the rotation control switch 620 is continuously pressed for three seconds to the occipital head of the occupant, the main body 400 is driven by driving the first motor 520 for two seconds from the first one second to three seconds. It is possible to rotate upward.

In addition, the driver may adjust the rotation of the headrest 1000 manually or semi-automatically.

In the case of semi-automatically adjusting the rotation of the headrest 1000, the driver turns on the switch (not shown) separately installed in the vehicle seat or the headrest to apply power to the automatic power transmission unit 500, thereby providing the headrest 1000. Can be linearly moved and rotated after being set vertically, and the power of the first motor may be cut off by turning off the switch after rotating by a desired angle. Since the rotation process of the headrest 1000 is as described above, a detailed description thereof will be omitted.

In an embodiment of the present invention, the fixed gear 510 is composed of an arc-shaped tooth 511 and a straight tooth 512 connected to one end of the arc-shaped tooth 511 and facing the front-back direction of the vehicle. In the state in which 400 is leaned forward, it is moved vertically and then moved horizontally to the rear. For this purpose, the through-hole 310 through which the first frame 200 of the moving frame 300 and the side support 410 passes. The shape of is formed in the long hole.

The manual operation unit 900 may rotate the main body 400 upward or downward when the occupant needs, and is also configured to move horizontally, particularly to prevent the main body 400 from being separated by unexpected external pressure. To this end, the push rod 910 penetrating the moving frame 300 is guided along the arc-shaped guide groove 253 formed in the plate 251 of the guide rail 250 fixed to the first bar 200 by moving Manually the position of the headrest 1000 is naturally adjusted manually.

Hereinafter, a method for automatically operating a headrest according to an embodiment of the present invention will be described with reference to the drawings.

6 is a view showing in sequence the automatic operation of the headrest mounted on the passenger seat according to an embodiment of the present invention.

As shown, first, the main body 400 is turned forward (initial state) as an initial state.

Next, when the occupant of the occupant is detected through a pressure switch (not shown) mounted on the door switch or the vehicle seat, the second motor 830 of the elevating apparatus 800 is driven by the controller 700 to thereby operate the main body 400. At the same time, the first motor 520 is driven to move the main body 400 so as to be retracted while retreating backward (preparation state).

In this case, when the elevating device 800 is not separately provided, the main body 400 only needs to be retracted while retreating backward.

Subsequently, the photosensor 610 installed inside the groove formed in the main body 400 detects the occipital head of the occupant. In this case, when the occipital occupant of the occupant is not detected by the photosensor 610 for a preset time, for example, 15 seconds to 25 seconds, the main body 400 is controlled by the controller 700. 520 is linearly moved forward due to the reverse rotation drive (step 1).

In this case, the driving power input to the first motor 520 is not continuously input but is input in a step form for a predetermined time.

After the first step is completed, the photosensor 610 detects the occipital head of the occupant again.

In addition, when the occipital occupant of the occupant is not detected by the photosensor 610 for a preset time, the main body 400 is forward due to the reverse rotation driving of the first motor 520 under the control of the controller 700. Rotate to (step 2).

Repeat steps 3 and 4 with the same operation as step 2 until the occipital head of the occupant is detected.

As such, the body 400 rotates discontinuously without continuously rotating forward of the vehicle seat. That is, after the power is input in a step form at intervals of a predetermined time to the first motor 520, the rear sensor is detected by the photosensor 610, and the step 2, 3, 4 Passing

During the above step, when the occipital head of the occupant is detected, the power supply to the first motor 520 is cut off and the front rotation of the main body 400 is stopped.

If the occipital head of the occupant is not detected until the last stage, it is possible to maintain the rotation angle of the last stage.

Step angle of rotation of the main body 400 can adjust the operating time (seconds) of the first motor 520, the number of steps can also be freely set in advance.

Finally, when the occupant gets off, the pressure sensor mounted on the vehicle seat is turned off and the second motor 830 of the elevating device 800 is driven to lower the main body 400 and simultaneously drive the first motor 520. The main body 400 is rotated to be turned forward to return to the initial state (return to the initial state).

On the other hand, as shown in Figure 7, the operation order of the headrest mounted on the rear seat is the same as the operation order of the passenger seat, and only some, such as fixed gear 510, worm 530 and bevel gear 540, etc. It is sufficient to change the placement of the parts and to step up from the initial state of leaning the body back to the upright position.

Therefore, the neck of the occupant can be protected, and the main body is flipped backward when the occupant gets off, thereby securing the driver's side and rear view.

8 is a view showing in sequence the automatic operation of the headrest mounted to the driver's seat according to an embodiment of the present invention.

As shown, first, as the initial state, the main body 400 is erected vertically (initial state).

Next, when the occupant of the occupant is detected through a pressure switch (not shown) mounted on the door switch or the vehicle seat, the second motor 830 of the elevating apparatus 800 is driven by the controller 700 to thereby operate the main body 400. At the same time, the first motor 520 is driven so that the main body 400 moves backwards (ready state).

In this case, when the elevating device 800 is not provided separately, only the operation of retreating the main body 400 to the rear may be performed.

Subsequently, the photosensor 610 installed inside the groove formed in the main body 400 detects the occipital head of the occupant. In this case, when the occipital occupant of the occupant is not detected by the photosensor 610 for a preset time, the main body 400 moves forward due to the reverse rotation driving of the first motor 520 under the control of the controller 700. It is moved linearly (step 1).

As such, when the first step adjustment of the occupant's head and the headrest 1000 is automatically completed, the driver's head is detected for a preset time, for example, 17 seconds to 20 seconds by the photo sensor 610, and the second step is spaced. Enter the adjustment stage. After the two-step interval adjustment, the third step is adjusted. After the third step is adjusted, the last step is adjusted. When the interval adjustment of the fourth step is finished, the operation of the photo sensor 120 is stopped. Therefore, if the occipital head of the occupant is not detected until the fourth stage, the headrest 1000 is maintained at the interval adjustment state of the fourth stage.

On the contrary, if the occipital head of the occupant is detected during the operation from step 1 to step 4, the controller 700 stops driving of the first motor 520 to maintain the posture of the headrest (S175).

As a result, the gap between the headrest 1000 and the back of the occupant may be automatically adjusted when the occupant rides, thereby protecting the neck and head of the driver in case of a vehicle accident.

Subsequently, when the occupant gets off, the pressure sensor mounted on the vehicle seat is turned off to drive the first motor 520 to return the main body 400 to the initial state (return to the initial state). Stops working.

Here, the driver's seat may also be automatically adjusted by installing a lifting device 800, such as the passenger seat and the rear seat.

In the above description of the preferred embodiment of the present invention, the scope of the present invention is not limited only to the specific embodiments described above, and those skilled in the art are appropriately within the scope described in the claims of the present invention. Changes or modifications may be made.

Typically, in the above-described embodiment of the present invention, the fixed gear 510 is connected to the arc-shaped tooth 511 and one end of the arc-shaped tooth 511 and is a straight tooth 512 facing the front and rear direction of the vehicle. However, it is not necessary to be limited to such a configuration, and only circular arc-shaped teeth are formed as shown in FIGS. 10 and 11, and may be applied to a configuration in which linear movement is omitted.

As shown in FIGS. 10 and 11, only the arc-shaped tooth is formed in the fixed gear 510, and the worm 530 is directly connected to the first motor 520 without the bevel gear, thereby fixing the fixed gear 510. It is also possible to have a configuration that meshes with.

Claims

An elevating support unit installed on the upper and lower back of the seat to enable elevating movement;

A first bar fixed to the lifting support and extending in a horizontal direction;

A moving frame installed on the first bar to enable a rotational movement along the circumference of the first bar;

A main body surrounding the moving frame and moving together with the moving frame;

An automatic power transmission unit installed inside the main body to drive a rotational movement of the moving frame with respect to the first bar; And,

Includes a manual operation unit coupled to the movable frame to be movable along the longitudinal direction of the first bar,

The automatic power transmission unit includes a fixed gear installed so as not to rotate in the first bar, a first motor fixedly installed in the main body, a worm driven by the first motor and engaged with the fixed gear,

The manual control unit is a vehicle headrest, characterized in that configured to move the fixed gear along the longitudinal direction of the first bar.
The method of claim 1,

The manual operation unit,

A push rod which is bifurcated into the moving frame and contacts the fixed gear, and a push button installed at one end of the push rod, and pushes the fixed gear while the push rod moves to the fixed gear. Vehicle headrest, characterized in that configured to separate from the worm.
The method of claim 2,

On one side of the push rod side of the fixed gear protruding protrusions are formed protrusions, one end of the push rod is a vehicle headrest characterized in that the hook portion is engaged with the locking groove is formed.
The method of claim 2,

A pair of side supports are provided at both ends of the first bar to allow relative rotation with respect to the first bar, and the push rod penetrates the side supports from the outside.
The method of claim 4, wherein

The vehicle headrest, characterized in that the fixing plate is connected between the pair of side supports.
The method of claim 4, wherein

Vehicle headrest, characterized in that the spring is connected between the side support and the circumference of the push rod.