JPH06339417A - Enclosable headrest structure - Google Patents

Abstract

PURPOSE:To secure the comfortableness and safety for a passenger seated on seat on which an enclosable headrest is mounted and to improve the applicability of the headrest to general purposes. CONSTITUTION:A headrest stay 12 having a horizontal shaft portion 12a at its lower end is loosely inserted into a guide hole 14 having a locking portion 14a and a rotating portion 14b, and is rotatably and slidably mounted on a seat back frame 20. The stay 12 is deviated by the lateral component of forces of a deviation means (extension coil spring) 30 in the direction of locking, and the headrest can be enclosed in the rear of the upper end of the seat back under the action of a downward component of force generated as the stay is unlocked by an unlock means 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable headrest structure capable of storing a headrest in a predetermined storage position under rocking in the front-rear direction.

[0002]

2. Description of the Related Art For example, as a headrest mounted on a rear seat of an automobile or the like, a so-called storage which can be swung between a support position for supporting a seated person's head and a storage position for ensuring a rear view of a driver. Style headrests are known.

Normally, in such a retractable headrest, the upper front portion of the seat back is set as the retracted position. When the seat is not seated on the rear seat, the headrest can be stored in the storage position by swinging from the supporting position in association with the driving of the motor which is linked to the switch operation of the driver or the like.

In such a structure, the protrusion of the upper end of the seat back is eliminated by storing the headrest.
The driver's rear view can be sufficiently wide. Therefore, the rear view is not obstructed by the headrest, and the headrest is prevented from interfering with safe driving performance.

[0005]

However, in the known construction in which the upper end front portion of the seat back is set as the storage position, the stored headrest projects to the front portion of the seat back, so that the rear seat occupant can ride on the vehicle. It is easy to get in the way. Further, if a driver or the like mistakenly operates the switch when seated on the rear seat, the stored headrest may abruptly contact the seated person on the rear seat, which may reduce the safety of the seated person on the rear seat.

Therefore, in the known configuration, the presence or absence of a seat occupant in the rear seat and the riding operation are detected by various sensors, and the drive control of the motor according to various conditions is used to prevent the malfunction of the headrest, that is, the seat occupant. Safety of
Comfort is ensured. However, in such a configuration, various sensors and the like are further required in addition to the motor, an increase in the number of parts and complication of the configuration cannot be avoided, and thus the retractable headrest tends to be expensive.

In particular, such drive control of the motor is usually performed by, for example, a microcomputer incorporated in the controller. Therefore, in the known retractable headrest, it is easy to limit the deployment to what is called a power seat provided with various motors, and it is not easy to use the retractable headrest in a wide range.

An object of the present invention is to provide a retractable headrest structure which is excellent in versatility while ensuring the comfort and safety of a seated person on a seat to which the retractable headrest is mounted.

[0009]

In order to achieve this object, according to the present invention, the stay of the headrest is installed through a guide hole of a substantially L shape in which a rotating portion and a lock portion are combined at a substantially right angle. It has been inserted. The lock portion is formed so as to be capable of restricting rotation of the headrest at the supporting position, and the stay is rotatable around the lower end horizontal shaft portion by the bracket so as to be rotatable in the front-rear direction and slidable along the horizontal axis. Is attached to.

Then, the stay is biased in the locking direction and the storage direction by the lateral component force and the downward component force of the biasing force of one biasing means obliquely arranged at a predetermined location, and the stay is unlocked by the unlocking means. The headrest can be stored in the storage position at the rear of the upper end of the seat back by pressing the stay in the unlocking direction against the lateral force of the biasing means.

[0011]

According to the present invention, the retractable headrest that can be automatically retracted can be constructed without using a motor. Further, since the storage position of the headrest is set to the rear portion of the upper end of the seat back, it is possible to reliably prevent the stored headrest from interfering with a seated person or the like.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

As shown in FIG. 1, in the retractable headrest structure 10 according to the present invention, the stay of the headrest is
12 is bent and formed with a horizontal shaft portion 12a at the lower end. Then, the stay 12 is disposed by loosely inserting the guide hole 14, and by holding the horizontal shaft portion 12a by the pair of brackets 16 and 17, the stay 12 is rotatable in the front-rear direction and slidable along the horizontal axis, for example, It is attached to the seat back frame 20.

As can be seen from FIG. 2, the headrest
22 is fixed to, for example, the upper end of the stay 12, and is swingably mounted in the front-rear direction together with the stay via the slit 24 to the upper end of the seat back 26 of the rear seat. Then, in the retractable configuration, the headrest 22 is configured to be swingable between a support position that supports the head of the seated person and a storage position that is set below the lower limit of the rearward visibility of the driver. ing.

Here, in the present invention, the storage position of the headrest 22 is set to the rear portion of the upper end of the seat back 26, as shown by the alternate long and short dash line, with respect to the support position shown by the solid line in FIG. That is, the headrest 22 can swing in the front-rear direction within a predetermined range behind the support position.

As can be seen from FIG. 1, the guide hole 14
Is, for example, as a long hole with a width that allows the stay 12 to be freely inserted,
The bracket 28 of the seatback frame 20 is drilled. The guide hole 14 includes, for example, the lock portion 14a and the rotating portion 14
The stay 12 is formed in a substantially L shape by combining b at a substantially right angle, and the stay 12 is configured to be continuously movable between the lock portion and the rotating portion.

The lock portion 14a of the guide hole is a headrest.
Only in the supporting position of 22, the rotating portion 14 is provided so as to ensure the sliding of the stay 12, that is, the movement in the horizontal axis direction.
It is provided for b. In such a configuration, the stay 12 is engaged with the peripheral edge of the lock portion in the rotation direction by the guide hole entering the lock portion 14a, so that the swinging of the headrest 22 in the storage direction in the support position is prevented. It
That is, the headrest 22 is lockable at the support position.

As can be seen from FIGS. 3 and 4 in addition to FIG. 1, in the present invention, the stay 12 is biased in both the locking direction and the storage direction by one biasing means 30. There is. As the biasing means 30, for example,
A tension coil spring stretched obliquely between the stay 12 and a predetermined position of the seatback frame 20 can be used so that the biasing force F0 can be divided into a lateral force component Fx and a downward force component Fy to be applied.

As shown in FIGS. 1 and 3, a pair of locking pieces 32, 33 are fixed to the horizontal shaft portion 12a of the stay and the horizontal member of the seat back frame 20, respectively. here,
The locking piece 32 is arranged, for example, on the right side of the brackets 16 and 17 in the figure, and the locking piece 33 is arranged on the left side of the locking piece 32 in the figure.

The biasing means (tensile coil spring) 30 is obliquely stretched between the horizontal shaft portion 12a of the stay and the horizontal member of the seatback frame 20 by the locking of the terminals to the locking pieces 32, 33. Has been done. In such a configuration, the biasing means 30
The lateral component force Fx of is applied to the stay as a biasing force that biases the stay 12 in the locking direction.

As can be seen from FIGS. 1 and 4,
The locking pieces 32, 33 are provided so as to project rearward of the horizontal shaft portion 12a of the stay and the seatback frame 20, that is, rightward in FIG. In such a configuration, the downward biasing force of the biasing means 30 acts on the stay 12 as the downward component force Fy.

That is, as described above, the biasing means 30 is provided between the locking pieces 32, 33 projecting rearward at the position displaced in the left-right direction.
By tensioning, the biasing means consisting of one tension coil spring can simultaneously obtain the biasing force in both the locking direction and the storing direction.

In the present invention, the lock releasing means 36 enables the stay 12 in the supporting position, that is, the headrest 22 to be unlocked. The lock releasing means 36 is configured to include, for example, a pressing piece 38 that can press the stay 12 in the lock releasing direction, and the wire 40
It is configured to be able to be released by a pulling operation of an operation lever (not shown) connected by.

As shown in FIGS. 1 and 3, the pressing piece 38 is pivotally attached to the bracket 28 by a pivot pin 42 at a position adjacent to the horizontal shaft portion 12a of the stay in the locking direction, for example.
The stay 12 is provided so as to be moved in the unlocking direction under the pressure associated with the clockwise rotation. One end of the wire 40 is connected upward from the pivot pin 42, for example.

The operating lever is an operator, for example,
It is provided so that it can be towed at a position where the driver can operate it.

In such a structure, the wire 40 is integrally pulled under the pulling operation of the operating lever, and the lock of the stay 12 is released under the rotation of the pressing piece 38 accompanying the pulling. .

Reference numeral 44 is a bracket fixed to the stay 12 for securing a contact surface with the pressing piece 38.
By providing such a bracket 44 at the bent end of the stay 12, stable pressing of the stay by the pressing piece 38 can be easily performed.

As can be seen from FIG. 3, the pressing piece
38 is biased in the pressing release direction by, for example, a return spring 46. As the return spring 46, for example, a tension coil spring stretched between the free end of the pressing piece 38 and the bracket 28 can be used.

For example, assume that the support position shown by the solid line in FIG. 2 is the initial position of the headrest 22. As shown in FIG. 3, at the support position of the headrest 22, the stay 12
Is biased in the locking direction, that is, to the left in the figure under the lateral component force Fx of the biasing means 30, and the lock portion 14b of the guide hole is biased.
Has been entered and is being held.

Then, when the wire 40 is pulled from this state under the operation of the operating lever, the stay 12 is rotated by rotating the pressing piece 38 around the pivot pin 42 in the clockwise direction.
However, it is pushed out to the unlocked position, that is, to the rotating portion 14b of the guide hole, against the lateral force Fx of the biasing means 30.

As can be seen from FIG. 5, the headrest
At the support position of 22, when the stay 12 is pushed out to the rotating portion 14b, the stay becomes free in the rotating direction, so that the downward component force Fy shown in FIG. It is biased in the clockwise direction, that is, behind the seat back 26, and is automatically stored in the storage position at the rear of the upper end of the seat back (see the alternate long and short dash line in FIG. 2 and FIG. 6).

Here, in the retracted position of the headrest 22, as shown in FIG. 6, the downward component force Fy of the biasing means 30.
However, as a force for biasing the stay 12 further downward, the locking piece 32
Since the stay acts on the stay, the backlash of the stay, that is, the headrest 22 at the storage position is sufficiently suppressed.

When the headrest 22 is returned from the retracted position to the support position, the headrest 22 is directly swung in the support position direction by a person sitting on the rear seat or the like. When the headrest 22 is pressed or pulled toward the supporting position, the stay 12 resists the downward component force Fy of the biasing means 30 and moves the guide hole to the supporting position of the headrest 22, as shown in FIG. It rotates integrally with the moving part 14b in the counterclockwise direction in the figure.

Then, as shown in FIG. 5, the headrest
When the stay 12, that is, the stay 12 is returned to the supporting position, the stay becomes free in the locking direction, so that the stay is biased in the locking direction under the lateral component force Fx of the biasing means, and the locking portion is locked.
The stay at the supporting position is held again by the engagement at 14a.

That is, in such a configuration, the biasing means 30
If the headrest 22 is swung to the supporting position against the downward component force Fy, the stay 12 is automatically locked under the lateral component force Fx.

As described above, according to the retractable headrest structure 10 of the present invention, the headrest 22 of the rear seat is moved downwardly by the pulling operation of the operation lever when the seat is not seated on the rear seat. Stored automatically under. Therefore, the driver's rearward view can be sufficiently widened, the headrest does not hinder the driver from performing safe driving, and the safety is improved.

Since the stay 12 is biased in both the locking direction and the storage direction under the biasing means 30 composed of one tension coil spring, the structure is not complicated.

Further, unlike the known construction in which the headrest is stored in the front portion of the upper end of the seat back, in the present invention, the headrest 22 is stored in the rear portion of the upper end of the seat back 26 as shown by the alternate long and short dash line in FIG. , The retracted headrest does not project in the direction of the seat back seating surface. Therefore, by the headrest 22 in the storage position,
The safety and comfort of the occupant at the time of riding can be surely improved without disturbing the occupant of the rear seat occupant.

Even when the headrest 22 is stored, the user can sit on the rear seat without being hindered by the headrest. That is, the use position and the storage position of the headrest can be arbitrarily selected regardless of the presence / absence of a seat occupant in the rear seat, so that it is particularly easy to secure the rear view when the child is seated on the rear seat.

Further, even if the headrest 22 is unexpectedly retracted due to an erroneous operation of the operation lever or the like when seated on the rear seat, the headrest only falls backward.
Therefore, even when there is a seat occupant in the rear seat, the stored headrest 22 does not come into contact with the seat occupant, and sufficient safety can be secured against erroneous operation of the operation lever.

Further, in the present invention, since the motor is not used and various sensors are not required for the safety measures for protecting the motor and the occupant, the structure can be simplified and the retractable headrest structure 10 can be manufactured at a low price. Can be fully converted. In other words, the object to which the retractable headrest is attached is not limited to a power seat of a luxury car or the like, and can be widely deployed to a normal seat without a motor, so that the retractable headrest structure 10 having excellent versatility can be provided.

Here, in the embodiment, the stay 12 is formed in a substantially U-shape that is continuous in the left and right, but it is sufficient if the shape has the horizontal shaft portion 12a at the lower end. A pair of substantially L-shaped left and right stays may be arranged to face each other and the horizontal shaft portions may be individually held.

However, if the stay 12 is formed in a substantially U shape having a continuous horizontal shaft portion 12a at the lower end, twisting between the left and right stays can be surely prevented, so that the stay, that is, the headrest 22 is smoothly rocked. Movement is secured.

Further, in the embodiment, one tension coil spring stretched obliquely behind the stay 12 and the seatback frame 20 via the locking pieces 32 and 33 is laterally divided to the stay 12. A biasing means that can apply both force Fx and downward component force Fy
It is embodied as 30. However, the biasing means 30 is sufficient as long as it can apply both the lateral component force Fx and the downward component force Fy to the stay 12, and therefore is not limited to the illustrated position and may be provided at another position.

Further, the lock releasing means 36 is embodied as a structure capable of releasing the lock of the stay 12 by the pressing piece 38 in conjunction with the pulling operation of the operation lever, but the operator such as a driver can easily lock it. The structure is not limited to this, as long as it can be released. However, according to the lock releasing means 36 in which the operating lever and the pressing piece 38 are linked so as to be interlockable with the wire 40, the pulling operation of the operating lever is surely converted into the unlocking operation of the pressing piece, so that the structure is simple. Nevertheless, the proper unlocking operation of the unlocking means 36 can be sufficiently ensured.

Although the seat back of the rear seat is illustrated in FIG. 2 and the retractable headrest structure of the rear seat is specifically described here, the present invention is not limited to the rear seat and is mounted on, for example, an assistant seat. The present invention may be applied to a headrest. In this case, the storage position of the headrest is set to be lower than the lower limit of the forward field of view of the seat occupant of the rear seat.

Further, although the retractable headrest structure of the present invention is suitable for automobile seats, it is not limited to this, and for example, for other seats of trains, airplanes, ships, etc.,
The present invention may be applied.

The above-mentioned embodiments are for explaining the present invention, and do not limit the present invention in any way.
It goes without saying that the present invention includes all those which are modified or modified within the technical scope of the present invention.

[0049]

As described above, according to the retractable headrest structure of the present invention, the stay can be biased in both the locking direction and the storage direction under the biasing force of one biasing means. , The configuration is definitely simplified.

Since a motor or the like is not used, the structure can be inexpensive, and the object to be mounted is not limited to the power seat, and can be widely spread to ordinary seats having no motor. Therefore, a retractable headrest structure with excellent versatility can be provided.

Further, since the headrest is stored in the rear portion of the upper end of the seat back, the headrest in the storage position does not interfere with riding or sitting on the rear seat, and the safety and comfort of the seat occupant of the rear seat are improved. Certainly improved.

Then, one tension coil stretched obliquely between the horizontal shaft portion of the stay and the horizontal member of the seat back frame behind the horizontal shaft portion of the stay via the locking pieces at positions separated from each other in the left-right direction. By forming the biasing means from the spring, the biasing force in both the locking direction and the storing direction suitable for the retractable headrest structure of the present invention, that is, the lateral component force and the downward component force applied to the stay are surely ensured. can get.

Further, according to the lock releasing means in which the operating lever and the pressing piece are linked so as to be interlocked with each other by wire, the pulling operation of the operating lever is surely converted into the unlocking operation of the pressing piece, so that the structure is simple. Nevertheless, the proper unlocking operation of the unlocking means can be sufficiently ensured.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a retractable headrest structure according to the present invention viewed from the rear of a seat back.

FIG. 2 is a schematic perspective view of a seat back to which a retractable headrest is attached.

FIG. 3 is a schematic front view of the retractable headrest structure in a locked state.

FIG. 4 is a line A of FIG. 3 in the retracted position of the headrest.
FIG. 6B is a vertical cross-sectional view of the retractable headrest structure taken along the line A.

FIG. 5 is a schematic front view of the retractable headrest structure in an unlocked state.

6 is a longitudinal sectional view of a retractable headrest structure similar to that of FIG. 4, in a retracted position of the headrest.

[Explanation of symbols]

 10 Retractable headrest structure 12 Stay 12a Horizontal shaft of stay 14 Guide hole 14a Guide hole locking part 14b Guide hole rotating part 20 Seat back frame 22 Headrest 26 Seat back 30 Biasing means (tensile coil spring) 32, 33 Engagement Stopper 36 Lock release means 38 Pusher piece 40 Wire 42 Pivot pin 46 Return spring

Claims (3)

[Claims] 1. A retractable headrest capable of swinging between a supporting position for supporting a seated person's head and a retracted position set below the lower limit of the field of vision, and rotation between the retracted position and the retracted position. The stay of the headrest loosely inserted in a guide hole of a substantially L shape, which is a combination of a rotating portion that secures the following; a lock portion that can regulate the rotation at the support position; It is attached to the seat back so that it can be rotated in the front-rear direction and slidable along the horizontal axis by holding, and the lateral component force in the locking portion that is biased in the locking direction and the downward force that is biased in the storage direction One biasing means is obliquely arranged at a predetermined position so that both of the directional force components can be applied to the stay, and the biasing means under the releasing operation by the lock releasing means at the support position of the headrest. By pushing the stay in the unlocking direction against the lateral component force of the stay, the stay is pushed out from the lock part of the guide hole to the rotating part, and the headrest is moved to the rear part of the upper end of the seat back under the downward component force of the biasing means. A retractable headrest structure that can be stored in the storage position. 2. One of the locking pieces is projected and fixed at the horizontal shaft portion of the stay rearward, and the corresponding other locking piece is separated from the locking piece of the stay in the locking direction. ,
The retractable type according to claim 1, wherein one tension coil spring fixed to a horizontal member of the seat back frame below the stay is obliquely stretched between a pair of left and right locking pieces as a biasing means. Headrest structure. 3. A lock release means, an operation lever provided at a position operable by a person who is an operator; a pressing piece pivotally attached so as to press the stay in the unlocking direction; an operation lever, a pressing piece And a return spring for biasing the pressing piece in the unlocking direction; and a wire for connecting the spaces in an interlocking manner and rotating the pressing piece in the unlocking direction under the pulling operation of the operation lever. The retractable headrest structure according to claim 1 or 2, wherein the stay is forcibly slid in the unlocking direction by pressing the stay against the lateral component force of the biasing means associated with the pulling operation of the operation lever against the biasing force. .