JPH06999Y2 - Movable headrest structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a movable headrest structure capable of ensuring a front view of a seat occupant of a rear seat and a rear view of a driver by moving the headrest to a retracted position.

[Conventional technology]

For example, as represented by a passenger car seat, a headrest is arranged at the upper end of a seat back of a seat of various vehicles. Such a headrest has a safety ensuring function of supporting the head of a seated person and limiting the rearward movement of the head of the seated person relative to the torso during a collision to reduce obstacles to the cervical part. is doing. Further, in the normal state, the headrest maintains the stability of the head of the seated person, thereby helping to secure an optimal posture that does not give a feeling of fatigue.

The headrest is generally provided with, for example, a front seat, via pipe-shaped support rods called two stays.
It is attached to the upper end of the seat back of the rear seat.

As such a headrest, for example, it is swung by a motor between a support position for supporting the head of a seated person and a storage position below the front view of the rear seat seated person or the rear view of the driver. A movable headrest having a structure is known. According to the movable headrest having such a configuration, the headrest of the assistant seat and the headrest of the rear seat can be stored below the front and rear lines of sight by controlling the motor by operating a switch or the like. Therefore, it is possible to secure the front view of the occupant of the rear seat during normal traveling and the rear view of the driver during back traveling without being obstructed by the corresponding headrest.

[Problems to be solved by the device]

As described above, in the known configuration, the movable headrest is configured to be swingable between the storage position and the support position.

Here, there is known a full flat seat in which a seat back of a front seat (assistant seat) is tilted backward, for example, to form a long support surface that is continuous and continuous with a seat cushion of a rear seat. In such a full flat seat, the headrest is generally removed in order to make the seat back of the assistant seat and the seat cushion of the rear seat flat.

However, such a headrest structure has a headrest drive mechanism for swinging the headrest and the like,
Generally, it is non-detachably attached to the upper end of the seat back. Therefore, the movable headrest cannot be attached to the full flat seat.

In addition, the pillow boot for preventing the stay between the headrest and the seat back from being exposed, the seat cover for covering the seat, and the like are generally attached and replaced by removing the stay of the headrest from the upper end of the seat back. Even in such a case, the owner or the like of the automobile cannot arbitrarily remove the headrest, so that the pillow boot and the seat cover cannot be easily replaced.

This device can be removed from the top of the seat back,
An object of the present invention is to provide a movable headrest structure that can be stored below a front view line or a rear view line of a seated person.

[Means for Solving the Problems]

In order to achieve this object, according to the present invention, the headrest is detachably attached to the shaft pivotally supported on the upper end of the seat back via the pair of stays and the headrest holder. The headrest is configured to be swingable by the operation of the headrest drive mechanism accompanying the driving of the motor.

Further, an operating piece capable of pressing a releasing piece of a locking means for locking and unlocking the stay is provided, and a headrest is provided so as to be detachable from an upper end of a seat back by operating the operating means.

Here, it is preferable that the release piece of the headrest holder is pressed by the operation of the operating means and the headrest can be detached from the upper end of the seat back only when the headrest is at the substantially rear end position of support.

〔Example〕

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

As shown in FIG. 1, in a movable headrest structure 10 according to the present invention, a headrest 12 includes a pair of stays 14
It is attached to the upper end of the seat back 16 via the, and the headrest is stored together with the stay by the drive of the motor 18,
It is configured to be swingable between supporting positions. As the motor 18, for example, a DC geared motor can be used.

The pair of stays 14 are attached to the pair of support brackets 24 of the shaft 22 via, for example, the headrest holder 20, as can be seen from FIG. 2 in addition to FIG. The shaft 22 may include, for example, a pair of pivot brackets 26.
The pivot brackets are provided at both ends and are fixed to a pair of brackets 30 fixed to the seat back frame 28 with, for example, a set screw 32. In such a configuration, the shaft
22 is rotatably attached to the seat back frame 28. The pair of support brackets 24 are formed in, for example, a tubular shape and are fixed to the shaft 22 by welding or the like. Then, the headrest holder 20 having the insertion hole 34 through which the stay 14 can be inserted is inserted and fixed to the support bracket 24.

The headrest holder 20 is provided with locking means 21 capable of locking the stay 14, as can be seen from FIG. 3, for example. The locking means 21 is, for example, a locking claw capable of being locked in a locking groove (not shown) of the stay 14 under biasing force.
It is formed from a lock plate 35 having 35a, which is pivotally attached to the upper end of the headrest holder 20 by a pivot pin 37. Further, the lock plate 35 has, for example, an integrated release piece 36, and is configured to release the lock of the stay 14 by pressing the release piece against the biasing force. With such a configuration, if the stay 14 is inserted into the headrest holder 20,
The locking claw 35a of the lock plate is locked in the locking groove of the stay under a biasing force to lock the stay. Further, if the release piece 36 of the lock means 21 is pressed against the biasing force,
The claw 35a of the lock plate rotates together with the release piece, and the locking claw of the lock plate separates from the locking groove of the stay 14,
The stay lock is released. Therefore, the stay 14 can be locked and unlocked arbitrarily and easily.

Here, the headrest holder 20 has, for example, as shown in FIG. 3, a locking piece 40 corresponding to the cut groove 38 of the support bracket 24 at the lower end, and the cut groove and the engagement formed by inserting the headrest holder into the support bracket. The headrest holder is fixed to the support bracket by locking the stopper.

In such a configuration, since the headrest holder 20 is rotated together with the shaft 22, the headrest 12 is rocked in the front-rear direction together with the stay 14 about the shaft.

Here, as shown in FIGS. 1 and 2, a headrest drive mechanism 42 for transmitting the drive of the motor 18 to the headrest 12.
Includes a link arm 44 and a connecting rod 46, and the headrest can be rocked by raising and lowering the connecting rod.

The link arm 44 extends, for example, in a direction orthogonal to the axis of the shaft 22 and is fixed to the shaft, and the upper end of the connecting rod 46 is pivotally attached to the tip of the link arm by a pivot pin 48. The pivot pin 48, as shown in FIG.
The insertion hole 50 of the connecting rod and the insertion hole 52 of the link arm are communicated with each other and, for example, attached by an E ring 54 so as not to be detachable. Further, the connecting rod 46 is formed with a rack 56 at the lower end. Here, for example, an adjusting nut 57 and an adjusting screw 58 may be provided in the middle portion to form the connecting rod 46. According to such a configuration, by the adjusting nut 57 and the adjusting screw 58,
Since the total length of the connecting rod 46 can be finely adjusted, an assembly error or the like can be absorbed, and a connecting rod capable of accurately transmitting the drive of the motor 18 to the link arm 44 of the shaft can be obtained as described later.

The motor 18 may have a set screw, for example, as shown in FIG.
It is fixed to the motor bracket 60 by 59, and the motor bracket is attached to the side bracket of the seatback frame 28.
Fixing pieces 66, 65 extending inward from 62 are fixed by set screws 66. The motor 18 is a rack 56 of connecting rods.
The pinion gear 68 meshes with the motor, and the pinion gear is connected to the motor and the pinion gear via an insertion hole 69 of the motor bracket so as to be interlocked by, for example, a pair of spline joints 70. The spline joint 70 on the motor side is
Formed in 71.

Here, as shown in FIG. 2, the rack guide 74 is fixed to the motor bracket 60 via the spacer 72, and the rack 56
Is slidably supported by the rack guide. The rack guide 74 has, for example, a leaf spring 76 that can come into contact with the back surface 56a of the rack, and the rack 56 is constantly meshed with the pinion gear 68 under the biasing force of the leaf spring. In such a configuration, the rack guide 74 via the spacer 72 restricts the movement of the rack 56 to the left and right, and the rack is always meshed with the pinion gear 68 under the biasing force of the leaf spring 76. The meshing of the rack, pinion gear can be surely obtained. The rack guide 74 may be, for example, a set screw 78.
Is fixed to the spacer 72 of the motor bracket 60.

In such a configuration, the rack 56, that is, the connecting rod 46 is moved up and down by the rotation of the pinion gear 68 accompanying the driving of the motor 18, and the connecting rod swings the link arm 44 to rotate the shaft 22. Let And the shaft
The headrest holder 20 is rotated together with 22, and the headrest 12 is centered on the shaft together with the stay 14.
It is swung back and forth.

By the way, the motor 18 is connected to, for example, a battery via an ignition switch, and is driven by using the ignition switch as a main switch and the battery as a power source. The drive of the motor 18 causes the headrest 12 to swing between the stored position and the support position, and
It is operated by a position where a person seated on the rear seat can operate, for example, an auto switch (not shown) provided in a console box, an armrest or the like. Further, the front and rear position of the headrest 12 of the assistant seat is adjusted by a manual switch (not shown) provided at a position where the seat occupant of the assistant seat can operate. As the auto switch and the manual switch, for example, an automatic reset type seesaw switch can be used.

Generally, in the movable headrest structure 10 having such a structure, the headrest 12 includes, for example, a central processing unit including a microcomputer. Then, the central processing unit is configured to process the signal from the control switch and to output an appropriate control signal to the motor, etc., and the control system centering on the central processing unit drives the motor 18, that is, the headrest 12 The storage, return, and front and rear positions are controlled.

Further, according to the present invention, by operating the operation means 80,
A headrest 12 together with a stay 14 is configured to be removable from the upper end of the seat back. The operating means 80 is composed of, for example, an operating lever 84 which integrally has an operating piece 82 capable of pressing the release piece 36 of the headrest holder. The operation lever 84 is rotatably supported by a support plate 86, and is attached to a mounting plate 88 fixed to the upper end of the seat back frame 28 by a set screw 90. The operation piece 82 of the operation lever, for example, so as to simultaneously press the pair of release pieces 36 of the headrest holder 20,
It is bent and formed.

For example, as shown in FIG. 1, when the operating lever 84 is pulled at the support end position of the headrest 12, the operating lever is rotated counterclockwise about the pivotal support portion 84a,
The operation piece 82 simultaneously presses the pair of release pieces 36 of the headrest holder. Then, the stay 14 in the headrest holder 20 is unlocked, so that the stay can be removed from the headrest holder, that is, the headrest 12 can be removed from the upper end of the seat back. With such a configuration, the operation of the operation lever 84 releases the locking means of the headrest holder 20 and the headrest 12 can be removed together with the stay 14, so that the movable headrest can be removed even for a full flat seat that requires the removal of the headrest. Can be installed.

Further, since the owner of the automobile can freely attach and detach the headrest 12 by operating the operation lever 84, the pillow boot, the seat cover and the like can be easily attached and replaced.

Reference numeral 91 shown in FIGS. 1 and 2 indicates a stay guide, which is formed so as to guide the insertion of the stay 14 into the headrest holder 20 and is fixed to the upper end of the seatback frame 28 above the headrest holder. ing. Further, reference numeral 92 indicates a support rod for reinforcing the mounting plate 88.

Here, for example, as shown in FIG. 1, the operation piece 82 of the operation lever is configured to be able to press the release piece 36 of the headrest holder only at the almost end position of supporting the headrest 12. For example, as shown in FIG.
At the storage position of 12, the headrest holder 20 is rotated, and the release piece 36 of the headrest holder and the operation piece 82 of the operation lever are separated, so that the operation piece cannot press the release piece. Therefore, even if the seat occupant of the rear seat accidentally contacts the operation lever 84 at a position other than the support end position of the headrest 12, for example, at the retracted position or the front support position, the locking means 21 of the headrest holder 20 is not released. Therefore, the safety of the seat occupant of the assistant seat and the seat occupant of the rear seat can be sufficiently ensured.

Here, as shown in FIGS. 5A and 5B, the headrest 12
The headrest holder 20 may be integrally provided with a rotating plate 94 that prevents the operation lever from rotating at a position other than the support end position. The rotary plate 94 is configured, for example, with a notch 96, which is the fifth
As shown in FIG. (A), the headrest 12 is molded at a position that allows the operation piece 82 to rotate only at a substantially rear end position.
Then, as shown in FIG. 5 (B), when the rotary plate 94 is rotated together with the headrest holder 20, the position of the notch 96 is moved by the rotation of the rotary plate, so that the operation piece 82 is not rotated. It is blocked by the outer peripheral surface of the rotating plate. With such a configuration, at a position other than the support end position of the headrest 12, the operation piece 82 of the operation lever cannot press the release piece 36 by being blocked by the rotating plate 96. Therefore, malfunction of the locking means of the headrest holder 20 can be sufficiently prevented, and the assistant seat occupant,
The safety of the seat occupant of the rear seat can be more sufficiently ensured.

In the embodiment, the operating means 80 is embodied as the operating lever 84 integrally provided with the operating piece 82, but it is not limited to this and, for example, as shown in FIG. The release piece 36 of the headrest holder may be pressed. The push button 98 is slidably attached to the attachment plate 88 of the seat back frame via a return spring 100 such as a compression coil spring, and the release button 36 of the headrest holder is pressed by pressing the push button, The stay 14 can be unlocked by the locking means.

According to such a configuration, the push button 98 can press the release piece 36 only when the headrest 12 is in the substantially support rear end position, and presses the release piece when the headrest is in the front support position or the storage position. It becomes impossible and cannot contact other members. Therefore, the safety of the seat occupant of the assistant seat and the seat occupant of the rear seat can be sufficiently ensured, and damage to the operating means and other members can be sufficiently prevented.

In the embodiment, the movable headrest structure 10 is
It is embodied as a headrest that is attached to the assistant seat. However, the invention is not limited to this, and the movable headrest structure 10 of the present invention may be mounted as, for example, a headrest of a rear seat or a driver seat.

In addition, in the embodiment, the headrest drive mechanism 42 is configured to include a link arm 44 fixed to the shaft and a connecting rod 46 with a rack 56 that is moved up and down by the drive of the motor 18. However, since it is sufficient if the headrest 12 can swing between the storage position and the support position, the structure is not limited to this. For example, the shaft 22 may be directly rotated by driving the motor 18.

Further, in the movable headrest structure 10 of the embodiment, the headrest 12 is configured to be swingable only in the front-back direction with respect to the seatback 16. However, the present invention is not limited to this structure, and in addition to the swinging in the front-rear direction, for example, a structure in which the headrest can be moved up and down with respect to the seatback 16 by a motor built in the headrest 12 is used in the movable type of the present invention. The headrest structure 10 can be applied. in this case,
The wiring code of the motor in the headrest 12 is, for example,
The stay 14 and the headrest holder 20 are configured to be connectable by a pair of contacts provided on the stay 14 and the headrest holder 20 and capable of contacting each other.

Although the movable headrest structure 10 of the present invention is suitable for a vehicle seat, it is not limited to this and may be applied to other seats.

The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention in any way, and all modifications and alterations within the technical scope of the present invention are also included in the present invention. Needless to say.

[Effect of device]

As described above, according to the movable headrest structure according to the present invention, it is provided with the operating means capable of pressing the release piece of the locking means of the headrest holder, and the headrest can be detached from the upper end of the seat back by operating the operating means. Mounted on. That is, the stay is locked by the headrest holder by operating the operating means, and the headrest can be removed together with the stay. Therefore, the movable headrest can be mounted even on a full-flat seat that requires the removal of the headrest.

Further, since the owner of the automobile can freely attach and detach the headrest by operating the operation lever, the pillow boot, the seat cover and the like can be easily attached and replaced.

If the operating means is configured to be able to press the release piece of the headrest holder only when the headrest is almost at the support end position, the headrest may be abruptly detached due to an erroneous operation at the headrest storage position, the support end position, etc. Can be prevented. Therefore, the seated person's injury can be sufficiently prevented, and the seated person's safety can be sufficiently ensured.

[Brief description of drawings]

1 and 4 are schematic vertical cross-sectional views of the movable headrest structure according to the present invention at the supporting rear end position and the retracted position of the headrest, and FIG. 2 is a partial fracture of the movable headrest structure. Fig. 3 is a schematic exploded perspective view, Fig. 3 is a schematic vertical sectional view of a headrest holder, and Figs. 5 (A), (B) and Fig. 6 are enlarged end faces of respective parts in a modified example of the movable headrest structure of the present invention. It is a figure. 10: Movable headrest structure, 12: Headrest, 14:
Stay, 16: Seat back, 18: Motor, 20: Headrest holder, 21: Lock means, 22: Shaft, 28: Seat back frame, 36: Release piece, 42: Headrest drive mechanism, 44: Link arm, 46: Connection Rod, 56: rack, 68: pinion gear, 80: operating means, 82: operating piece, 8
4: Operating lever, 94: Rotating plate, 96: Notch.

Claims (6)

[Scope of utility model registration request] 1. A movable headrest structure that is swung between a storage position that secures a field of view and a support position that supports the head of a seated person, the structure being attached to the upper end of a seatback via a pair of stays. , A headrest that supports the head of a seated person, a shaft that is axially supported at the upper end of the seat back, and a stay that can be inserted and that has a release piece of locking means for locking and unlocking the stay. Headrest holder that is fixed to the shaft corresponding to the above, operating means that can press the release piece of the headrest holder, and a headrest drive mechanism that is connected to the motor for swinging the headrest and that transmits the drive of the motor to the main body of the headrest. And the headrest drive mechanism is driven by the motor to operate the headrest between the supporting position and the retracted position. While being swung, the headrest is detachably attached to the seat back upper end, by operating the operation means, the movable headrest structure, characterized in that the headrest is configured to be removable from the seat back upper end. 2. A headrest drive mechanism extends in a direction orthogonal to an axis of a shaft, and is a link arm fixed to the shaft, and an upper end is pivotally attached to the link arm, and a rack is formed at a lower end of the link arm. A rod and a pinion gear, which is provided so as to be interlockable with the motor and meshes with the rack of the connecting rod, is rotated by the drive of the motor and raises and lowers the connecting rod through the rack. 2. The movable type according to claim 1, wherein the link arm is swung by the ascending / descending of the connecting rod, and the headrest is swung in the front-back direction with respect to the seat back by the rotation of the shaft accompanying the swing of the link arm. Headrest structure. 3. The release piece of the headrest holder is pressed by the operation of the operating means only when the headrest is substantially in the support rear end position, so that the headrest can be removed from the upper end of the seat back. Movable headrest structure. 4. The movable headrest structure according to claim 3, wherein the operating means is an operating lever integrally provided with an operating piece capable of pressing the releasing piece. 5. A rotating plate having a notch into which the operation piece of the operation means can be loosely fitted is provided so as to be rotatable integrally with the headrest holder, and the operation piece of the operation piece is provided only when the headrest is substantially at the support end position. The movable headrest structure according to claim 4, wherein a notch is formed at a position allowing rotation. 6. The movable headrest structure according to claim 3, wherein the operating means is a push button capable of pressing the release piece.