JPH11208341A - Head rest device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head rest device whereby a head rest can be moved to a storage position by simple operation. SOLUTION: In a seat for a vehicle provided with a head rest device 20 in an upper part of a seat back, a movable side frame 23 is provided through a hinge mechanism 40 in a fixed side frame 22. The hinge mechanism 40 is provided with a link 72 provided in the fixed side frame 22, lock member 86 having a lock pin 95, lock spring 110 energizing the lock pin 95 in a direction fitted to a lock groove 33, return spring 120 energizing the movable side frame 23 in a head rest storage direction, and an operating cable 130 connecting one end side to the lock member 86 for unlocking a lock. The other end side of the operating cable 130 is connected to a seat back hinge, when the seat back is brought down, by drawing the operating cable 130, the lock pin 95 and the lock groove 33 are disengaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headrest device suitable for a seat of, for example, an automobile.

[0002]

2. Description of the Related Art There is known an automobile rear seat (rear seat) having a headrest provided above a seat back (backrest). In this type of rear seat, when the seat back is tilted forward to fold the seat, if the seat back is tilted with the headrest provided on the seat back,
Depending on the position of the front seat, the rear headrest may interfere with the front seat.

In this case, if the front seat is slid forward to increase the space on the front side of the rear seat, the seat back of the rear seat may fall down.
However, if the seat back is tilted in this manner, the rear headrest may hinder the sliding of the front seat when the front seat is slid backward, so that the front seat may not be slid. For this reason, the headrest is configured to be detachable, and the headrest is detached from the seat back as necessary.

[0004]

However, the detachable headrest has a problem that it takes time to attach and detach the headrest, and furthermore, it is difficult to secure a place for the removed headrest, and the headrest tends to be an obstacle. In addition, after tilting the headrest forward, there are also those that move the rear seat back forward, but it is necessary to perform the operation of lowering the headrest and the operation of lowering the seatback separately,
There was a problem that it took time. Therefore, an object of the present invention is to provide a headrest device capable of moving a headrest to a storage position by a simple operation.

[0005]

According to a first aspect of the present invention, there is provided a headrest device, comprising: a fixed frame having a pair of right and left stays provided on an upper portion of a seat back; A movable frame provided rotatably in the front-rear direction by a mechanism, a return spring for urging the movable frame toward the storage position with respect to the fixed frame, and the movable side when the headrest is raised to the use position. The vehicle includes a lock member that engages with the lock locking portion of the frame, and a lock release operation member that can be driven in a direction that removes the lock member from the lock locking portion. According to this configuration, when the lock member is moved to the unlock position by the unlock operation member, the headrest is quickly moved to the storage position by the return spring.

According to a second aspect of the present invention, there is provided a link rotatably mounted about a horizontal hinge shaft, a friction braking means for applying a frictional force between the fixed frame and the link, The lock includes a lock member rotatably provided on the link. According to this configuration, the position of the headrest in the front-rear direction can be adjusted steplessly by applying a force greater than the frictional force to the movable frame.

In the present invention, the other end of the unlocking operation member is connected to the seat back hinge, and the unlocking operation member is driven in the unlocking direction when the seat back falls forward. May be configured. According to this configuration, the headrest falls to the storage position in conjunction with the forward leaning operation of the seat back.

According to a fourth aspect of the present invention, the headrest device is provided on a rear seat, and an operation portion for operating an unlocking operation member of the headrest device is moved to a position (for example, a rear position) where a driver can operate. (The front lower end of the cushion). According to this configuration, the driver operates the operation unit to move the lock member of the rear headrest device in the unlocking direction, so that the rear headrest quickly moves to the storage position.

According to a fifth aspect of the present invention, a headrest device is provided in the passenger seat, and an operation portion for operating an unlocking operation member of the headrest device is provided on the rear seat side. According to this configuration, by operating the operation unit provided on the rear seat side to move the lock member of the passenger seat headrest device in the unlocking direction, the passenger seat headrest quickly moves to the storage position.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The vehicle seat 10 shown in FIG. 9 is applied to, for example, a passenger seat or a rear seat of an automobile, and includes a seat cushion 11, a seat back 12, and a reversible headrest 13 provided on an upper portion of the seat back 12. I have.

The seat back 12 can be tilted forward about a shaft 16 of a seat back hinge 15 shown in FIG. The seat back hinge 15 is a hinge base 1 provided on a frame on the seat cushion 11 side.
7 and a seat back member 18 on the seat back 12 side.

The headrest device 20 including the headrest 13 is configured as shown in FIGS.
The headrest device 20 shown in FIG. 2 includes a fixed frame 22 having a pair of right and left stays 21 and a fixed frame 2.
2 is provided with a movable frame 23 that can rotate in the front-rear direction of the vehicle. The movable frame 23 is provided to be relatively rotatable in the front-rear direction with respect to the fixed frame 22 by a pair of left and right hinge mechanisms 40 and 41 described later.

The movable frame 23 includes a pair of left and right frame bases 25 formed by pressing a sheet metal or the like, and a gate-shaped head frame 26 having both ends welded to each frame base 25.
It has. The outside of the movable frame 23 is covered with a pad material (not shown).

Each frame base 25 has a circular hole 30.
, A slit 31 is formed along an arc centered on the hole 30. The slit 31 has a stopper wall 32 located on the trailing edge side and a lock groove 33 provided on the upper edge side and functioning as a locking engagement portion.

Since the basic structure of the pair of left and right hinge mechanisms 40 and 41 is the same (symmetric), the first hinge mechanism 4 located on the right side in FIG.
0 will be described below. The hinge mechanism 40 has a hinge pin 45 extending in the horizontal direction. As shown in FIG. 3, the hinge pin 45 includes a large-diameter flange portion 46 provided on one end side and a first stepped portion 47 located next to the flange portion 46.
, A cylindrical intermediate body 48, and a small-diameter second stepped portion 49.
And a caulking portion 50. First stepped portion 47
Is rotatably inserted into the hole 30 of the frame base 25. That is, the dimension L in the axial direction of the stepped portion 47 is slightly larger than the plate thickness T of the frame base 25, and enables the rotation of the frame base 25 with respect to the hinge pin 45.

A bent edge 55 serving also as a reinforcement is formed around the frame base 25, and a spring engagement portion 56 and a cutout portion 57 are formed in the bent edge 55. The upper end of the fixed frame 22 is inserted from below the notch 57.

The lower portion of the stay 21 is removably inserted from above into a mounting hole or the like provided in a frame (not shown) of the seat back 12. A stay bracket 60 is welded to the upper end of the stay 21. Stay bracket 60
Is provided with a bent edge 61 also serving as reinforcement,
A cable attachment portion 62 and a spring locking portion 63 are provided on the bent edge 61. A circular through hole 65 is formed in the center of the stay bracket 60. This through hole 65
, The intermediate body 48 of the hinge pin 45 is inserted.

Stay bracket 60 and frame base 25
A first shim 70 and a second shim 71 functioning as friction members, and a plate-shaped link 72 sandwiched between the shims 70, 71 are provided between the first and second shims 70 and 71. Holes 70a, 71a, 72a into which the intermediate body 48 of the hinge pin 45 is inserted are formed in the shims 70, 71 and the link 72. As shown in FIG. 3, the other end side of the hinge pin 45, that is, the second stepped portion 49 side projects outside the stay bracket 60.

A disc spring 75 is provided outside the stay bracket 60.
And a washer 76 are provided. The disc spring 75 is compressed in the axial direction of the hinge pin 45 and the stay bracket 60 is
And the washer 76. And the second stepped portion 4
The caulking part 50 is formed by caulking the terminal of No. 9, and the washer 76 is prevented from coming off by the caulking part 50.

The repulsive load of the disc spring 75 presses the stay bracket 60 toward the link 72, so that the shim 70,
A frictional force is generated between the link 71 and the link 72. Sim 70,
The link 71, the link 72, and the disc spring 75 constitute friction braking means for suppressing the rotation of the link 72 with respect to the stay bracket 60.

When a longitudinal load exceeding the frictional force is input to the link 72, the link 72
With respect to 0, it can rotate in the front-rear direction with frictional resistance. The range in which the link 72 can rotate with respect to the stay bracket 60 is restricted by two stopper walls 80 and 81 provided on the stay bracket 60.

A connecting pin 85 is fixed to an end of the link 72. The connecting pin 85 is inserted into a hole 87 provided at one end of the lock member 86. The connecting pin 85 includes a retaining ring mounting groove 88 located outside the lock member 86 and a spring mounting portion 89. In the retaining ring mounting groove 88,
A retaining ring 90 such as an E-ring is provided for restricting lateral movement of the lock member 86.

The other end of the lock member 86 has a connecting pin 85
A lock pin 95 extending in a direction parallel to the direction is fixed. A non-circular detent part 96 having a non-circular cross section is provided on one end side of the lock pin 95. The rotation preventing portion 96 is inserted into a connecting portion 98 at one end of a pipe-shaped connecting member 97. The connecting member 97 has a function of interlocking the lock pins 95 of the left and right hinge mechanisms 40 and 41 with each other.
As shown in FIG. 4, between the detent part 96 and the connection part 98, in order to allow the detent part 96 and the connection part 98 to relatively rotate around an axis within a certain angle range α.
They are fitted with some play around the axis.

As shown in FIG. 2, the connecting member 97 extends in the horizontal direction, and the connecting portion 99 at the other end of the connecting member 97 is
The detent part 9 of the lock pin 95 of the other hinge mechanism 41
6 is fitted. Therefore, the left and right hinge mechanisms 40, 41
The lock members 86 are interlocked with each other via the connecting member 97.

The lock pin 95 has a shape and a size that can be fitted in the lock groove 33 of the slit 31, and
When the lock 3 is in the use position shown in FIG. 5 (at the time of locking), the lock pin 95 is fitted into the lock groove 33, so that the movable frame 23 is fixed to the fixed frame 22.

As shown in FIG. 1 and the like, a spring receiving portion 112 for locking the first end 111 of the lock spring 110 and a wire connection portion 113 are provided on the other end side of the lock pin 95. The lock spring 110 locks the first end 111 to the spring receiving portion 112 and the second end 115 to the link 72 in a state where the coil portion is inserted outside the spring mounting portion 89. By doing so, the repulsive load of the lock spring 110 acts in the direction in which the lock member 86 stands up, that is, in the counterclockwise direction in FIG. The lock spring 110 and the lock member 86
The lock groove 33 and the like constitute locking means for locking the headrest 13 in the use position.

The movable frame 23 is urged by a return spring 120 using a tension coil spring in a direction of falling forward, that is, in a direction of a storage position. The first end 121 of the return spring 120 is locked by a spring locking portion 56 provided on the frame base 25. The second end 122 of the return spring 120 holds the spring locking portion 63 of the stay bracket 60 in a state where tension is applied to the return spring 120.
It is locked to. Due to the repulsive load of the return spring 120, the movable side frame 23 is rotationally urged in a direction of falling forward, that is, in a direction of the storage position shown in FIG.

The hinge mechanism 40 and the seat back hinge 15
An operation cable 130 that functions as an unlocking operation member is provided between the control cable 130 and the operation cable 130 (shown in FIG. 8). The operation cable 130 has the inner wire 132 movably inserted inside the outer tube 131, one end 131 a of the outer tube 131 is fixed to the cable attaching portion 62 of the stay bracket 60, and one end 132 a of the inner wire 132 is connected to the lock pin 95. Is connected to the wire connection part 113 of Therefore, when the one end 132a of the inner wire 132 is moved in the direction of being drawn into the outer tube 131, the lock member 86 is rotated clockwise in FIG. 5, so that the lock pin 95 comes out of the lock groove 33.

The other end of the operation cable 130 is guided to the position of the seat back hinge 15 shown in FIG. The other end 131 b of the outer tube 131 is fixed to the seat back member 18 of the seat back hinge 15, and the other end 132 b of the inner wire 132 is connected to the hinge base 17. Therefore, the seat back member 18 is
When pivoted forward with respect to 7, the other end 132b of the inner wire 132 moves in a direction to be pulled out from the outer tube 131.

Next, the operation of the vehicle seat 10 including the headrest device 20 having the above-described configuration will be described. During normal use of the headrest 13, the lock pin 95 of the lock member 86 is locked by the lock spring 110 as shown in FIG.
With this, it is fitted in the lock groove 33. Therefore, the movable frame 23 is fixed to the stay bracket 60 via the lock member 86 and the link 72.

In this locked state, when a load in the front-rear direction larger than the frictional force between the shims 70, 71 and the link 72 is applied to the movable frame 23, the lock pin 95 locks as shown in FIG. The movable side frame 23 is kept in the reference position N while being fitted in the groove 33, that is, in the locked state.
From the front to the back and forth in a certain angle range. Therefore, the position of the movable frame 23 in the front-rear direction can be adjusted steplessly as necessary.

The movable side frame 23 is not necessarily limited to such an adjustable structure. For example, without using the link 72, the connecting pin 85 is connected to the stay bracket 60.
And a lock member 86 may be rotatably attached to the connecting pin 85.

When the seat back 12 is tilted forward, the seat back member 18 of the seat back hinge 15 is tilted forward as shown by an arrow F in FIG.
The 30 inner wires 132 move in the direction in which they are pulled out of the outer tube 131. For this reason, the lock member 8
6 pivotally moves down against the elasticity of the lock spring 110, and the lock pin 95 moves in a direction to come out of the lock groove 33. The movement of the lock pin 95 is controlled by the connecting member 97.
Through the lock member 86 of the hinge mechanism 41 on the opposite side, the lock pin 95 of the hinge mechanism 41 on the opposite side also comes out of the lock groove 33. Therefore, the left and right hinge mechanisms 4
0 and 41 are almost simultaneously unlocked (unlocked).

When the hinge mechanisms 40 and 41 are in the unlocked state, the rebound load of the return spring 120 causes
When the movable frame 23 falls down to the front, that is, the storage position shown in FIG. 7, and the lock pin 95 abuts against the stopper wall 32, the movable frame 23 is held at the storage position. In this way, the headrest 13 is stored in the storage position at the same time as the seatback 12 falls forward.

In this embodiment, as described above, the position of the movable frame 23 can be adjusted steplessly by the friction braking means such as the link 72, the shims 70, 71 and the disc spring 75. And, no matter what position the movable frame 23 is adjusted, the movable frame 23 can be moved to the storage position when the lock member 86 is in the unlocked state.

In order to return the headrest 13 from the storage position of FIG. 7 to the original use position, the headrest 13 is manually raised against the elasticity of the return spring 120. By doing so, the lock pin 95 moves toward the lock groove 33 while sliding on the upper edge of the slit 31, and when the headrest 13 stands up to the use position, the lock pin 95 of the lock member 86 fits into the lock groove 33. By doing so, FIG.
To the use position (locked state).

In this embodiment, since there is a play (see FIG. 4) between the lock pin 95 and the connecting portion 98 of the connecting member 97, either one of the left and right hinge mechanisms 40 and 41 is locked. When the pin 95 is fitted in the lock groove 33 first, it is prevented that the other lock pin 95 stops halfway and does not fit in the lock groove 33. Therefore, both the left and right hinge mechanisms 40 and 41 can be reliably returned to the locked state.

In the above embodiment, the seat back 12
The other ends 131b and 132b of the operation cable 130 are moved so that the headrest 13 falls to the retracted position in conjunction with the front fall of the operation cable 130.
Is connected to the seat back hinge 15, but the present invention is not limited to this. For example, an operation unit of the unlock operation member is provided near the seat so that the lock member 86 can be directly operated in the unlock direction. The headrest 13 may be configured to be stored irrespective of the forward falling operation.

For example, the headrest device 20 of the present invention
Is provided on the passenger seat, and an operation unit (for example, an operation lever capable of pulling the inner wire 132) for operating the unlocking operation member is provided on the rear seat side, so that when a passenger is not on the passenger seat, In order to secure a front view of the rear seat, the headrest of the passenger seat may be tilted from the rear seat side.

Further, the headrest device 20 of the present invention is provided on the rear seat, and an operating portion (eg, an operating lever capable of pulling the inner wire 132) for operating the unlocking operating member can be operated by the driver (eg, at a position where the driver can operate the unlocking member). If the driver can lean down the rear headrest when the vehicle is backed up by providing it at the front lower end of the rear cushion, etc., the rear view can be further secured.

As shown in FIG. 7, in a seat 10 having a rotating ottoman (leg-rest mat) 140, a hinge having the same locking means as the headrest device 20 of the present invention at the center of rotation of the ottoman 140. A mechanism is provided so that the ottoman 14
0 may be adjusted, and when not in use, it may be stored by operating the operation unit of the unlocking operation member.

[0042]

According to the first aspect of the present invention, the headrest can be quickly moved to the storage position by a simple operation. According to the invention described in claim 2, the position of the headrest can be adjusted steplessly while the headrest is locked in the use position, and when the lock is released, regardless of the position of the headrest, the headrest can be quickly moved to the storage position. Can be moved.

According to the third aspect of the present invention, when the seat back is tilted forward, the headrest can be automatically moved to the storage position, and the headrest can be easily moved with the seat back tilting operation. And can be stored quickly.

According to the invention described in claim 4, the storage of the headrest of the rear seat is remotely controlled from the driver side,
The rear view can be secured. According to the invention described in claim 5, the front view of the rear seat can be secured by remotely controlling the storage of the headrest in the passenger seat from the rear seat side.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a part of a headrest device showing one embodiment of the present invention.

FIG. 2 is a front view of the headrest device shown in FIG. 1;

FIG. 3 is a longitudinal sectional view of a part III in FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a side view when the headrest device shown in FIG. 1 is used.

FIG. 6 is a side view showing a state where the position of the movable frame shown in FIG. 5 is changed.

FIG. 7 is a side view showing a state in which the movable frame shown in FIG. 5 has moved to a storage position.

FIG. 8 is a perspective view showing a seat back hinge of the seat having the headrest device shown in FIG. 1;

FIG. 9 is a side view of the seat having the headrest device shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Vehicle seat 12 ... Seat back 13 ... Headrest 20 ... Headrest device 22 ... Fixed side frame 23 ... Movable side frame 33 ... Lock groove (locking | locking part) 40, 41 ... Hinge mechanism 45 ... Hinge pin 72 ... Link 86 ... lock member 95 ... lock pin 110 ... lock spring 120 ... return spring 130 ... operation cable (lock release operation member)

Claims (5)

[Claims] A fixed frame having a pair of left and right stays provided on an upper portion of a seat back; a movable frame provided on the fixed frame so as to be rotatable in a front-rear direction by a hinge mechanism; A return spring that urges the fixed frame toward the storage position, a lock member that engages with a locking locking portion of the movable frame when the headrest stands up to a use position, and A headrest device, comprising: a lock release operation member that can be driven in a direction to remove the lockrest from the locking portion. 2. A link attached to the fixed frame so as to be rotatable about a horizontal hinge axis; a friction braking means for applying a frictional force between the fixed frame and the link; The headrest device according to claim 1, further comprising: a lock member rotatably provided. 3. The unlocking operation member is connected to a seatback hinge, and the unlocking operation member is driven in the unlocking direction when the seatback falls forward. The headrest device according to claim 1 or 2, wherein 4. The vehicle according to claim 1, wherein the headrest device is provided on a rear seat of the vehicle, and an operation unit for operating the unlocking operation member of the headrest device is provided at a position where the driver can operate. Or the headrest device according to 2. 5. The vehicle according to claim 1, wherein the headrest device is provided in a passenger seat of an automobile, and an operation unit for operating the unlocking operation member of the headrest device is provided on a rear seat side. Headrest device.