KR20070073474A - Head rest having rotary wing - Google Patents

Abstract

A headrest having a rotary wing is provided to unfold the rotary wing in an emergency by including a clutch and a locking member locking the clutch to a seat body. A headrest having a rotary wing includes a rotary shaft(330), a wing(360), a locking member, and a return spring(350). The rotary shaft is installed in a seat body. The wing includes an outer tub surrounding the rotary shaft. The locking member locks the wing to the seat body. The return spring returns the wing. A clutch is connected to or interrupted from the wing. The clutch includes a responding member for connecting and interrupting the wing to and from the clutch by detecting an impact.

Description

Head rest with rotary wing {head rest having rotary wing}

1 is an exploded perspective view of the central portion and the wing connecting portion according to a second embodiment of the present invention.

2A is a cross-sectional view of FIG. 1.

Figure 2b is a longitudinal sectional view showing the state of use of Figure 1;

Figure 3a is a cross-sectional view of the central portion and the wing connection portion according to the first embodiment of the present invention.

Figure 3b is a longitudinal sectional view showing the state of use of Figure 3a.

FIG. 3C is a schematic longitudinal sectional view showing another usage state of FIG. 3A; FIG.

Figure 4a is a cross-sectional view of the central portion and the wing connection portion according to a third embodiment of the present invention.

Figure 4b is a longitudinal sectional view showing the state of use of Figure 4a.

Figure 5a is a cross-sectional view of the central portion and the wing connection portion according to a fourth embodiment of the present invention.

FIG. 5B is a schematic longitudinal sectional view showing a state of use of FIG. 5A; FIG.

Figure 6 is a cross-sectional view of the connecting device according to a preferred embodiment of the present invention.

7 is a cross-sectional view of a connecting device according to another embodiment of the present invention.

** Description of symbols for the main parts of the drawing **

100: main body 110: nut part

120: bolt portion 130, 630: support portion

131, 631: damping member 132, 632: rear

133, 633: connection surface 134, 634: front

141, 641: vertical part 142, 642: connection part

150, 650: connecting body 160, 660: spring

170, 670: Frame 210, 310, 410, 510: Center part

211, 311, 411, 511: guide groove 212: motor

220, 320, 420, 520: locking member 221, 321, 421, 521: protrusion

222, 322, 422, 522: second projection 224, 324, 424, 524: pressing part

225, 325, 425, 525: upper spring 226, 326, 426, 526: delivery

227, 327, 427, 527: Ball 228, 328, 428, 528: Lower spring

229, 429, 529: support jaw 230, 330, 430, 530: pivot shaft

231, 232, 331, 332, 431, 531: long hole 240, 340, 440, 540: fourth transfer member

241, 341, 441, 541: protrusion 242, 362, 446, 563: locking groove

243, 343: Lower Flange 244, 344: Upper Flange

245, 345, 445, 545: teeth 246, 361: guide groove

250, 350, 450, 550: return spring

251 fixing part 252 rotating part

260, 360, 460, 560: wing 270, 370, 470, 570: first transfer member

271, 371, 471, 571: first incision

Mass: 272, 275, 292, 295, 372, 375, 392, 395, 472, 475, 493, 495, 593, 572, 575, 595

273, 275, 292, 295, 373, 376, 393, 396, 473, 476, 492, 496, 573, 574, 592, 595

274, 374, 474, 576: second incision

280, 380, 480, 580: second transfer member 290, 390, 490, 590: third transfer member

291, 391, 491, 591: third incision 294, 394, 496, 596: fourth incision

The present invention relates to a headrest provided with a rotatable wing, and in particular, a wing having an outer cylinder surrounding the pivot, a locking member for locking the wing to the seat body, and a return spring for returning the wing. Including, the headrest is provided with a rotational wing portion that is simple structure of folding the wing portion is reduced manufacturing cost.

Conventional vehicle seats are those disclosed in Korean Patent Application Laid-Open No. 1998-37917.

A seat back frame is disposed at an inner edge of the seat back to support the seat back. On the upper surface of the seat back adjacent to the head rest, a side head rest is provided on one side, and a stay with an adjustment handle attached to the upper end of the side head rest is vertically extended along the side hole of the side head rest and fixed to the seat back frame. .

The lower end of the stay fixed to the seat back frame is connected to the gear that rotates in the same direction in accordance with the operation of the adjustment knob, the position of the interlocking rotation is possible in engagement with the gear by simply operating the control knob to the left or right And a gear-mounted bracket is mounted at a point adjacent to the fixed position of the stay of the side back frame.

On the other hand, when the occupant sitting in the rear seat is leaning against the head rest with his head back while driving, he can rotate the adjustment knob on the one-axis of the side head rest disposed side by side with the upper surface of the seat back in a counterclockwise direction in order to lean in a comfortable position. As the gear connected to the lower end of the stay and the gear mounted on the seat back frame are interlocked and rotated together, the outer end of the side head rest gradually rotates toward the front seat, and the occupant sitting in the rear seat has the desired angle of the side head rest. To be used as a head restraint.

However, these seats can be supported when the user tilts the head only in one direction. If the seats are provided with side headrests on both sides, the seated user may not be absorbed when the seat is impacted. There is a problem.

In addition, if an impact is applied while the occupant rests his head on the side head rest, the user's head may hit the side head rest and may be injured.

On the other hand, the mounting structure of the side head restraint is complicated, there is a problem that the weight is expensive and the manufacturing cost is high.

The present invention has been made in order to solve the above problems, and includes a wing having an outer cylinder surrounding the rotation shaft, a locking member for locking the wing to the seat body, and a return spring for returning the wing; It is an object of the present invention to provide a headrest provided with a rotatable wing having a simple structure for folding the wing, thereby reducing manufacturing costs.

Headrest provided with a rotary wing of the present invention for achieving the above object, the rotating shaft is installed on the seat body, the wing portion is provided with an outer cylinder surrounding the rotating shaft, and locking the wing to the seat body And a return spring for returning the wing portion.

According to this structure, the structure which folds the said wing part is simple, and there exists an advantage that manufacturing cost is reduced.

Headrest provided with a rotatable wing portion according to another embodiment of the present invention is a rotating shaft is installed on the seat body, a wing portion provided with an outer cylinder surrounding the rotating shaft, a clutch connected to or cut off the wing portion, It comprises a locking member for locking the clutch to the seat body and a return spring for returning the wing, it is possible to spread the wing in an emergency to prevent the user from being injured.

The clutch may include a response member that detects an impact and connects or blocks the clutch to the wing, and when the impact is applied, the wing is automatically unfolded to prevent the user from being injured.

The locking member has a protrusion formed therein, the outer cylinder is formed with a guide groove into which the protrusion is inserted, a locking groove having a height greater than the height of the guide groove and communicating with the guide groove. A space in which the locking member is inserted is formed and communicates with the space, and a long hole into which the protrusion is inserted is formed. An upper spring is disposed above the locking member, and a pressing part is installed above the upper spring. The lower spring is disposed, the locking can be released by a simple structure, the locking member is installed on the rotating shaft has the advantage that the device can be kept compact.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

For reference, among the configurations of the present invention to be described below, the same configuration as the prior art will be referred to the above-described prior art, and a detailed description thereof will be omitted.

1 is an exploded perspective view of a central portion and a wing portion connecting portion according to a second preferred embodiment of the present invention, Figure 2a is a cross-sectional view of Figure 1, Figure 2b is a longitudinal cross-sectional view showing a state of use of FIG.

Figure 3a is a cross-sectional view of the central portion and the wing connecting portion according to a second embodiment of the present invention, Figure 3b is a longitudinal sectional view showing a state of use of Figure 3a, Figure 3c is a longitudinal sectional view showing another state of use of Figure 3a It is a simplified diagram.

Figure 4a is a cross-sectional view of the central portion and the wing connection portion according to a third embodiment of the present invention, Figure 4b is a longitudinal sectional view showing a state of use of Figure 4a.

Figure 5a is a cross-sectional view of the central portion and the wing connection portion according to a fourth embodiment of the present invention, Figure 5b is a longitudinal sectional view showing the state of use of Figure 5a.

6 is a cross-sectional view of the connecting device according to a preferred embodiment of the present invention, Figure 7 is a cross-sectional view of the connecting device according to another embodiment of the present invention.

1 to 7, the vehicle seat of the present embodiment includes a seat body, pivot shafts 230, 330, 430, 530 installed on the seat body, the pivot shafts 230, 330, 430, Wing parts 260, 360, 460, 560 having outer cylinders surrounding the 530, and locking members 220, 320, 420, 520 locking the wing parts 260, 360, 460, 560 on the seat body. And a headrest provided with pivotal wings 260, 360, 460, 560 including return springs 250, 350, 450, 550 for returning the wings 260, 360, 460, 560. It is done by

The seat body includes a main body 100 formed in a chair shape and a central portion 210, 310, 410, 510 installed on the top of the main body 100.

The connecting device for connecting the central parts 210, 310, 410, and 510 and the main body 100 is connected to the frames 170 and 670 and the central parts 210, 310, 410 and 510, and the frames 170 and 670. Connection body 150 and 650 installed on the spring), springs 160 and 660 disposed on the side of the connection body 150 and 650, and support portions 130 and 630 supporting the springs 160 and 660. It is made to include.

Frames 170 and 670 are installed on the upper part of the main body 100, and a space part is formed therein, and parts such as a connection main body 150 and 650, springs 160 and 660 and support parts 130 and 630 are inserted into the central part. Modules for the connection (210, 310, 410, 510).

The connection bodies 150 and 650 are connected to the central parts 210, 310, 410 and 510 and are installed in the frames 170 and 670.

Connection frames (170, 670) connecting to the central portion (210, 310, 410, 510) are respectively installed on both sides, and the connection bodies (150, 650) can be slid left and right on the upper part of the connection body (150, 650). The frame 170, 670 is formed so that the cut-out portion is inserted into the connecting frame 170, 670 can be slid.

Springs 160 and 660 are disposed on both sides of the connection body 150 and 650, respectively.

Support portions 130 and 630 are disposed outside the springs 160 and 660, respectively, to support the springs 160 and 660.

The support parts 130 and 630 are connected to the front surfaces 134 and 634 and the rear surfaces 132 and 632 and the front surfaces 134 and 634 and the rear surfaces 132 and 632 in contact with the springs 160 and 660. , 633).

Furthermore, it includes a nut part 110 installed on the frames 170 and 670 so as to be outside the support parts 130 and 630 and a bolt part 120 screwed to the nut part 110.

The nut part 110 is formed in a plate shape, and a through hole is formed in a central portion thereof, and a thread is formed on an inner circumferential surface of the through hole.

Bolt portion 120 is composed of a screw thread formed on the head and the outer peripheral surface, the screw portion is fitted into the through hole.

In addition, vertical parts 141 and 641 installed in the connection body 150 and 650 to be disposed between the connection body 150 and 650 and the support parts 130 and 630, and the support parts 130 and 630 and the support body. It further includes damping members 131 and 631 disposed between the vertical portions 141 and 641.

The vertical parts 141 and 641 are disposed in the support parts 130 and 630 and are connected to the connection bodies 150 and 650 through the connection parts 142 and 642.

The connecting portions 142 and 642 are slid at the same time as the connecting bodies 150 and 650 slide through the front surfaces 134 and 634.

The damping members 131 and 631 are filled in the support parts 130 and 630, and are provided as viscous fluids to attenuate vibrations transmitted to the connection bodies 150 and 650.

As a result, when the wing parts 260, 360, 460, and 560 installed in the center parts 210, 310, 410, and 510 are rotated to support the user's head, impacts are applied to the wing parts 260, 360, The connection bodies 150 and 650 and the vertical portions 141 and 641 slide in the direction in which the 460 and 560 and the central portions 210, 310, 410 and 510 are simultaneously impacted.

At this time, the connection body (150, 650) is supported by the spring (160, 660) to absorb the shock, the damping members (131, 631) to damp the vibration of the spring (160, 660) to effectively absorb the shock. It becomes possible.

In addition, when the support parts 130 and 630 are pushed by rotating the bolt part 120, the distance between the support parts 130 and 630 and the support parts 130 and 630 and the main body 150 and 650 may be adjusted. 660 to adjust the elastic force applied to the connecting body (150, 650).

Rotating shafts 230, 330, 430, and 530 are installed on both sides of the seat body, and are installed in the central portions 210 and 310 as in the first and second embodiments, or the third and fourth embodiments. It may be installed in the main body 100 as in the example.

The rotating shafts 230, 330, 430, and 530 communicate with the space portion into which the locking members 220, 320, 420, and 520 are inserted, and the protrusions 221, 321, 421, and 521 are inserted therein. Two long holes 231, 232, 331, 332, 431, and 531 are formed in the vertical direction.

The outer cylinder is formed of a hollow member and disposed immediately outside the rotation shafts 430 and 530 as in the third and fourth embodiments, so as to surround the rotation shafts 430 and 530, or the first and second embodiments. As in the example, the rotation shafts 230 and 330 may be wrapped so that the clutch is disposed between the rotation shafts 230 and 330 and the outer cylinder.

Wings 260, 360, 460, 560 may be installed outside the outer cylinder as in the first and second embodiments, or may be installed above the outer cylinder as in the third and fourth embodiments. It also supports the head of the occupant.

The locking members 220, 320, 420, and 520 are members that lock the wing portions 260, 360, 460, and 560 to the seat body, and are relative to the wing portions 260, 360, 460, and 560 with respect to the seat body. Keep it in place.

The locking members 220, 320, 420, and 520 may be applied in various forms. In the present embodiment, the locking members 220, 320, 420, and 520 may be inserted into the rotating shafts 230, 330, 430, and 530 in the space portion, and the protrusions 221, 321, and 421 may be provided on the outer circumferential surface thereof. , 521 and second protrusions 222, 322, 422, and 522 are formed.

The second protrusions 222, 322, 422, and 522 are inserted into the long holes 232 and 332 so that the locking members 220, 320, 420, and 520 move horizontally in the pivot shafts 230, 330, 430, and 530. It keeps sliding up and down smoothly.

The protrusions 221, 321, 421, and 521 penetrate the long holes 231, 331, 431, and 531, and the second protrusions 222, 322, 422, and 522 face the long holes 231, 331, 431, and 531. It is inserted into the long holes 232 and 332 on the viewing side.

That is, the protrusions 221, 321, 421, and 521 are formed longer than the second protrusions 221, 321, 421, and 521.

The outer cylinder has guide grooves 246 and 361 into which the protrusions 221, 321, 421 and 521 are inserted, and has a height greater than that of the guide grooves 246 and 361 and the guide grooves 246 and 361. Engaging grooves 242, 362, 446, and 563 are formed to communicate with each other.

The locking grooves 242, 362, 446, and 563 are formed at the ends of the guide grooves 246 and 361.

In the second and fourth embodiments, the engaging grooves 362 and 563 and the guide grooves 361 are formed in the outer cylinder. In the first and third embodiments, the engaging grooves 242 and 446 and the guides in the clutch are formed. Grooves 246 are formed.

Upper springs 225, 325, 425, and 525 are disposed on the locking members 220, 320, 420, and 520, and pressing parts 224, 324, and 225 are disposed on the upper springs 225, 325, 425, and 525. 424 and 524 are installed, and lower springs 228, 328, 428 and 528 are disposed below the locking members 220, 320, 420 and 520.

Support jaws 229, 429, and 529 are formed on the inner circumferential surfaces of the pivot shafts 230, 330, 430, and 530 to which the lower springs 228, 328, 428, and 528 are engaged.

Furthermore, in order to more effectively transmit the force of the pressing portions 224, 324, 424, 524, transfer pieces 226, 326, 426, 526 are disposed below the upper springs 225, 325, 425, 525. .

The transfer pieces 226, 326, 426, and 526 may be formed as blocks, or may be formed as a frame having an I-shaped cross section.

Balls 227, 327, 427, and 527 are disposed under the transmission pieces 226, 326, 426, and 526, so that the user can press the force even if the user transmits the force eccentrically through the pressing parts 224, 324, 424, and 524. The locking member 220, 320, 420, 520 can be effectively transmitted to.

The clutch is connected to or disconnected from the wing parts 260, 360, 460, and 560, and the clutch is connected to the wing parts 260, 360, 460, and 560 of the wing parts 260, 360, 460, and 560. It is simultaneously rotated through the rotational force and locked by the locking members 220, 320, 420, and 520.

As such, when the clutch is locked, the wing parts 260, 360, 460, and 560 are also locked at the same time.

The clutch includes a response member that detects an impact and connects or blocks the wings 260, 360, 460, and 560.

The response member receives a sensor for detecting an impact and a pin for connecting the clutch to the vanes 260, 360, 460, and 560 in response to a signal of the sensor, thereby moving the clutch and the vanes 260, 360. , 460, 560 can be connected or disconnected.

The clutch includes a first transfer member 270, 370, 470, 570 and a second transfer member 280, 380, 480, 580 inserted into the first transfer member 270, 370, 470, 570 and the first transfer member 270, 370, 470, 570. The second transfer member 290, 390, 490, 590 inserted into the second transfer member 280, 380, 480, 580 and the third transfer member 290, as in the first and second embodiments. 390, 490, 590 or the fourth transfer member 240, 340, 440, which is inserted into the inner or surrounding the first transfer member (270, 370, 470, 570) as in the third and fourth embodiments 540).

The response members of the present embodiment are the masses 272, 275, 292, 295, 372, 375, 392, 395, 472, 475, 493, 495, 593, 572, 575, 595, and the mass 272, 275, 292. Elastic members supporting 295, 372, 375, 392, 395, 472, 475, 493, 495, 593, 572, 575, 595 (273, 275, 292, 295, 373, 376, 393, 396, 473) , 476, 492, 496, 573, 574, 592 and 595.

First cutouts 271, 371, 471, and 571 are formed in the first transfer members 270, 370, 470, and 570, and first cuts are made in the outer cylinder or fourth transfer members 240, 340, 440, and 540. First grooves are formed at positions corresponding to the parts 271, 371, 471, and 571.

Second cutouts 274, 374, 474, and 576 are formed in the first transfer member 270, 370, 470, and 570, and second cutouts are formed in the second transfer member 280, 380, 480, and 580. Second grooves are formed at positions corresponding to 274, 374, 474, and 576.

The first cutouts 271, 371, 471, and 571 and the second cutouts 274, 374, 474, and 576 are formed to be disposed in a straight line.

Third cutouts 291, 391, 491, and 591 are formed in the third transfer members 290, 390, 490, and 590, and third cuts are formed in the outer cylinder or fourth transfer members 240, 340, 440, and 540. The third groove is formed at a position corresponding to the portions 291, 391, 491, and 591.

Fourth cutouts 294, 394, 496, and 596 are formed in the third transfer members 290, 390, 490, and 590, and fourth cutouts are formed in the third transfer members 290, 390, 490, and 590. Fourth grooves are formed at positions corresponding to 294, 394, 496, and 596.

The third cutouts 291, 391, 491, and 591 and the fourth cutouts 294, 394, 496, and 596 are formed to be arranged in a straight line, and the third cutouts 291, 391, 491, and 591 are aligned with each other. The fourth cutouts 294, 394, 496, and 596 are arranged to have a phase difference of 90 degrees with the first cutouts 271, 371, 471, and 571 and the second cutouts 274, 374, 474, and 576. do.

In this way, the cutout is staggered so that the clutch can be separated from the wings 260, 360, 460, and 560 for impact in various directions.

Masses 272, 275, 292, 295, 372, 375, 392, 395, 472, 475, 493, 495, 593, 572, 575 and 595 are inserted into the respective cutouts and corresponding grooves. Elastic members (273, 275, 292, 295, 373, 376) that support (272, 275, 292, 295, 372, 375, 392, 395, 472, 475, 493, 495, 593, 572, 575, 595). , 393, 396, 473, 476, 492, 496, 573, 574, 592 and 595 are inserted into the respective incisions.

Protrusions 241, 341, 441, 541 are formed at the bottom of the fourth transfer member 240, 340, 440, 540, and protrusions 241, 341, 441, 541 are formed on the guide member installed in the seat body. The guide grooves 211, 311, 411, and 511 to be inserted are formed in an arc shape so that the center angle is 90 degrees.

In the first and second embodiments, upper flanges 244 and 344 and lower flanges 243 and 343 are formed in the fourth transfer members 240 and 340.

The upper flanges 244 and 344 support the first transfer members 270 and 370, the second transfer members 280 and 380, and the third transfer members 290 and 390.

The lower flanges 243 and 343 have protrusions 241 and 341 formed at the bottom thereof, and teeth 245 and 345 are formed on the outer circumferential surface thereof.

In the third and fourth embodiments, the fourth transfer members 440 and 540 have lower flanges 443 and 543 formed on the inner wall, and the teeth 445 and 545 are formed on the outer circumferential surface of the lower flanges 443 and 543. At the bottom, protrusions 441 and 541 are formed.

The return springs 250, 350, 450, and 550 return the wing portions 260, 360, 460, and 560 to the unfolded state.

The return springs 250, 350, 450, and 550 are provided with torsion springs, and one end of the fixing part 251 is installed and fixed to the guide member, and the other end of the rotating part 252 is installed in the outer cylinder and the wing part 260. , 360, 460, and 560 are rotated together at the time of rotation.

The motor 210 is installed in the central portion 210, 310, 410, 510 or the connection body 150, 650 to automatically fold the wing portions 260, 360, 460, 560.

A gear is installed in the motor, and teeth 245, 345, 445, and 545 mesh with the gears to rotate the fourth transmission members 240, 340, 440, and 540, thereby allowing wing portions 260, 360, 460, and 560 to rotate. Can be rotated 90 degrees.

On the other hand, when the motor is installed in the connecting body (150, 650), as shown in Figure 7, the connecting frame (170, 670) is used as the rotating shaft (230, 330, 430, 530), the nut portion and The bolt portion may be omitted.

In addition, unlike the foregoing, pressing the switch instead of the clutch extends the transmission pieces 226, 326, 426, 526 or releases the locking by pressing the pressing parts 224, 324, 424, 524. It may further comprise a member.

Therefore, the user can immediately spread the wings 260, 360, 460, 560 at the time of impact.

In addition, a sensor for detecting an impact may be provided to automatically release the lock even when the user does not press the switch.

The operation of this embodiment having the above-described configuration will be described below.

As shown in FIG. 3B, the first embodiment is in a state in which the wing part 260 is normally unfolded, and the wing part 260 is used when the passenger uses the wing part 260 for sleep or the like. Rotate to maintain 90 degrees.

At this time, when the wing portion 260 is rotated, the clutch connected to the wing portion 260 is also rotated, and the protrusion 221 is inserted into the guide groove 246 of the fourth transfer member 240 and slides, which is desired by the user. When the angle is 90 degrees, the protrusion 221 is continuously received by the upper spring by the lower spring 228, so that the locking groove 242 is caught and the wing 260 and the clutch are locked.

Here, when an impact is applied to the outside of the wing portion 260, the masses 272 and 275 in the first cutout 271 and the second cutout 274 are pushed inward due to the impact.

As such, when the masses 272 and 275 are pushed during the impact (c), the masses 272 and 275 serving as pins for connecting the wing portions 260 and the clutches are separated from the outer cylinder, so the wing portions 260 and the clutches are removed. Will be separated.

Alternatively, when an impact is applied from the opposite side, the masses 272 and 275 in the third cutout 291 and the fourth cutout 294 are pushed by the impact, so that the wing 260 and the clutch are separated. Will be.

As described above, the clutch is provided with a plurality of transmission members, and each transmission member is connected to the masses 272 and 275 and the springs 273 and 276 so that the wing 260 may be unfolded even when an impact is transmitted in various directions.

Therefore, the protrusion 221 is caught in the locking groove 242 of the fourth transfer member 240, so that the wing 260 is unfolded by the return spring 250 even if the user does not press the pressing portion 224. do.

On the other hand, when in use (b) when pressing the pressing portion 224 to expand the wing 260 from the usual (a), the pressing force is transmitted to the locking member 220 through the transmission piece 226 and the ball 227. And the protrusion 221 is lowered along the long hole 231 by the transmitted force.

After pressing the pressing portion 224, the pressing portion 224 is returned to the original position by the upper spring 225.

As a result, the locking is released and the wing 260 is in an unfolded state by the return spring 250.

Alternatively, as shown in FIG. 3C, the initial state may be set in a state in which the wing 260 is rotated 90 degrees.

In this way, by applying the wing portion 260 rotated at 90 degrees to the rear magnet sheet, the wing portion 260 is disposed at the back of the seat 100 in the usual case (a), and when the wing portion 260 is used (b). The wing portion 260 is used by sliding forward at a state rotated by 90 degrees, and at the time of impact (c), the wing portion 260 is unfolded.

As shown in FIG. 2B, in the second embodiment, the wing part 360 is normally folded 180 degrees, and the protrusion 321 is hung in the locking groove 362 formed in the outer cylinder, thereby being folded 180 degrees. State is maintained.

When the user presses the pressing portion 324 in order to use the wing portion 360, the protrusion 321 is lowered to exit the locking groove 362 and the protrusion 321 by the force of the return spring 350. It slides along the guide groove 361 formed in the outer cylinder.

The guide groove 361 is formed such that the center angle is 180, and the fourth transmission member 340 is formed with a long hole 342 so that the center angle having the same height as the long hole 331 of the rotation shaft 330 is 180 degrees. It is preferable not to disturb the vertical movement of 321.

Here, the protrusion 341 formed on the fourth transfer member 340 rotates along the guide groove 311 having a center angle of 90 degrees.

When the wing portion 360 rotated by 90 degrees, the projection 341 formed in the clutch is caught by the guide groove 311 so that the clutch and the wing portion 360 are kept in a 90 degree state and are locked. Becomes

In addition, when the impact is applied outside the wing 360, that is, when the mass (372, 375) is pushed, as in the first embodiment at the time of impact (c), the pin connecting the wing 360 and the clutch Since the serving masses 372 and 375 are separated from the outer cylinder, the wing portion 360 and the clutch are separated.

At this time, the protrusion 321 is slid along the guide groove 361 formed in the outer cylinder so that the wing 360 is expanded.

As described above, the wing part 360 folded at 180 degrees is applied to the front seat of the vehicle, and when the wing part 360 is not in use, the seat is kept compact to prevent the driver's vision from being blocked.

As shown in FIG. 4B, in the third embodiment, the wing part 460 is normally unfolded in (a), and when the wing part 460 is used (b), the wing part 460 is rotated and maintained at 90 degrees. .

At this time, when the user rotates the wing portion 460 by hand in normal (a), the clutch connected to the wing portion 460 is also rotated, and the protrusion 421 is inserted into the guide groove of the fourth transfer member 440. When the user slides to a desired angle of 90 degrees, the locking groove 446 is caught, so that the wing 460 and the clutch are locked to a state of use (b).

The long hole 463 is formed in the outer cylinder such that the central angle having the same height as that of the long hole 431 of the rotating shaft 430 is 90 degrees so as not to interfere with the rotation of the protrusion 421.

Here, when the impact is applied to the outside of the wing 460, that is, when the impact (c) mass 472, 475 of the first cutout 471 and the second cutout 474 is inward due to the impact It is pushed.

When the masses 472 and 475 are pushed out in this manner, the masses 472 and 475 serving as pins for connecting the wing portion 460 and the clutch are separated from the outer cylinder, so that the wing portion 460 and the clutch are separated.

On the other hand, when an impact is applied from the opposite side, the masses 493 and 495 in the third cutouts 491 and 591 and the third cutouts 491 are pushed by the impacts, and thus the wing 460 and the clutch are pushed. Will be separated.

Thus, the protrusion 421 is caught in the locking groove 446 of the fourth transfer member 440, the long hole 463 is formed in the outer cylinder so that the protrusion 421 can be freely rotated, the user pressing portion 424 Even if it is not pressed, the wing 460 is in an unfolded state by the return spring 450.

On the other hand, when pressing the pressing portion 424 in order to unfold the wing 460 from the use (b) to the usual (a), the pressing force is transmitted to the locking member 420 through the transmission piece 426 and the ball 427. The protrusion 421 is lowered along the long holes 431 and 463 by the transmitted force.

As a result, the locking is released and the wing 460 is in the unfolded state by the return spring 450.

As shown in FIG. 5B, the fourth embodiment is normally in a state in which the wing portion 560 is folded 180 degrees, and the protrusion 521 is hung in the locking groove 563 formed in the outer cylinder, thereby being folded 180 degrees. State is maintained.

When the user presses the pressing part 524 in order to use the wing part 560, the protrusion part 521 descends and exits the catching groove 563, and the protrusion part 521 is driven by the force of the return spring 550. It slides along the guide groove formed in the outer cylinder.

The guide groove is preferably formed such that the center angle is 180 so as not to interfere with the sliding of the protrusion 521.

Here, the protrusion 541 formed on the fourth transfer member 540 rotates along the guide groove 511 having a center angle of 90 degrees.

The wing portion 560 rotated by 90 degrees has a protrusion 541 formed at the clutch and is caught by the guide groove 511 at the end thereof so that the wing portion 560 and the clutch remain in a 90-degree state.

In addition, when the impact is applied outside the wing 560, when the mass (572, 575) is pushed, as in the first embodiment, the mass 572, which serves as a pin for connecting the wing 560 and the clutch Since the 575 is separated from the outer cylinder, the wing 560 and the clutch are separated.

At this time, the protrusion 521 is slid along the guide groove formed so that the center angle is 180 degrees in the outer cylinder so that the wing 560 is unfolded.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications or variations of the present invention without departing from the spirit and scope of the invention described in the claims below Can be carried out.

According to the headrest provided with the rotary wing of the present invention as described above, there are the following effects.

And a wing portion provided with a rotation shaft installed in the seat body, an outer cylinder surrounding the rotation shaft, a locking member for locking the wing portion to the seat body, and a return spring for returning the wing portion. Since the folding structure is simple, the manufacturing cost is reduced.

In addition, there is an advantage that the occupant can sleep comfortably when used in the seat that is mounted on the bus, train, plane that must sit on the seat for a long time.

It is provided with a clutch connected to or blocked by the wing and a locking member for locking the clutch to the seat body, so that the wing can be unfolded in an emergency to prevent the user from being injured.

The clutch may include a response member that detects an impact and connects or blocks the clutch to the wing, and when the impact is applied, the wing is automatically unfolded to prevent the user from being injured.

The locking member has a protrusion formed therein, the outer cylinder is formed with a guide groove into which the protrusion is inserted, a locking groove having a height greater than the height of the guide groove and communicating with the guide groove. A space in which the locking member is inserted is formed and communicates with the space, and a long hole into which the protrusion is inserted is formed. An upper spring is disposed above the locking member, and a pressing part is installed above the upper spring. The lower spring is disposed, the locking can be released by a simple structure, the locking member is installed on the rotating shaft has the advantage that the device can be kept compact.

It comprises a spring disposed on the side of the connection body, and a support for supporting the spring, there is an advantage that can prevent the occupant from injury by absorbing the shock applied to the central portion.

In addition, when the occupant sleeps, the occupant's head is pivoted to support the head, and the center portion and the wing portion simultaneously slide to the left or the right to allow the occupant's posture to be naturally inclined, thereby allowing the occupant to sleep comfortably. Will be.

It includes a nut portion installed on the frame and the bolt portion screwed to the nut portion to come outside the support portion, it is possible to adjust the elastic force has the advantage of absorbing the impact more effectively.

It includes a vertical portion installed on the connecting body to be disposed between the connecting body and the support portion, and a damping member disposed between the support portion and the vertical portion, can absorb the shock more stable and effectively absorb the impact. .

Claims (4)

A rotating shaft installed on the seat body; A wing portion provided with an outer cylinder surrounding the pivot shaft; A locking member for locking the wing to the seat body; Headrest with a rotatable wing portion comprising a return spring for returning the wing. A rotating shaft installed on the seat body; A wing portion provided with an outer cylinder surrounding the pivot shaft; A clutch connected to or disconnected from the wing; A locking member for locking the clutch to the seat body; Headrest with a rotatable wing portion comprising a return spring for returning the wing. The method of claim 2, The clutch is a headrest with a rotatable wing portion characterized in that it comprises a response member for detecting the impact to connect or block the clutch to the wing portion. The method of claim 1, The locking member is formed with a protrusion, The wing portion has a guide groove into which the protrusion is inserted, and a locking groove having a height greater than the height of the guide groove and communicating with the guide groove. The rotating shaft is formed with a space portion into which the locking member is inserted and a long hole communicating with the space portion and into which the protrusion is inserted. An upper spring is disposed above the locking member, and a pressing part is installed above the upper spring. A headrest having a rotatable wing portion, characterized in that a lower spring is disposed below the locking member.

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