JPH0711951U - Retractable headrest structure - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the versatility of a retractable headrest while ensuring the comfort and safety of the seated person. [Configuration] Horizontal shaft 14 having a torque absorber 16 at one end
On the other hand, a pair of stays 18 of the headrest is attached so as to be movable in the axial direction and integrally rotatable, and a guide piece 46 including a guide groove 48 and a locking means 50.
Is provided adjacent to the stay. Then, the first and second biasing means 40, 42 respectively provided at predetermined locations
Thus, the stay 18 is biased in the contact direction with the guide groove 48 and the engagement direction with the holding portion 48a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a retractable headrest structure capable of setting a headrest in a predetermined storage position under swinging in the front-rear direction.

[0002]

[Prior art]

 For example, a so-called retractable headrest that is swingable between a supporting position that supports the seated person's head and a retracted position that secures the driver's rear view is known as a headrest that is mounted on a rear seat of an automobile or the like. ing.

Such a retractable headrest is usually a so-called power type equipped with a motor, and the headrest swings between the support position and the retracted position under the drive of the motor linked to the corresponding switch operation. Is configured to.

With such a configuration, by storing the headrest, there is no protrusion at the upper end of the seat back, and the driver's rear visual field can be sufficiently widened, which facilitates rearward confirmation. Therefore, by storing the headrest, it becomes possible to sufficiently perform safe driving easily when the vehicle is moving forward or backward.

[0005]

[Problems to be solved by the device]

 By the way, in the configuration having the motor as described above, in order to ensure the safety and comfort of the seat occupant of the rear seat and the safety of the motor itself, for example, various sensors are used to determine whether the seat occupant of the rear seat is present or not. And boarding motions are detected. Then, under the drive control of the motor according to various conditions, the position and the malfunction of the headrest are prevented, and the safety and comfort of the occupant in the power-type retractable headrest and the comfort of the motor are improved. We are trying to ensure safety.

However, in such a structure, a motor and various sensors are required, and an increase in the number of parts and complication of the structure are unavoidable, so that the retractable headrest tends to be expensive.

In particular, in such a configuration, since the information from various sensors is processed by the microcomputer (microcomputer) of the controller to control the drive of the motor, the known retractable headrest is equipped with various motors. Moreover, it is easy to be limited to the so-called power seat deployment. Therefore, the seat itself becomes expensive, and it is not easy to use the retractable headrest in a wide range of various automobiles.

Here, it is also possible to consider a configuration in which the headrest is automatically moved in one direction from the retracted position to the support position by a biasing means such as a spring member. However, simply using the spring member or the like causes the biasing force of the spring member or the like to be transmitted to the headrest as it is, so that the swing speed of the headrest is high and a large shock is generated when the headrest is stopped. Therefore, a structure that simply uses a spring member or the like is not very preferable in terms of safety and comfort.

An object of the present invention is to provide a storage type headrest structure that ensures the comfort and safety of a seated person and is excellent in versatility.

[0010]

[Means for Solving the Problems]

 In order to achieve this object, according to the present invention, the upper end rear part of the seat back is set to the storage position of the headrest, and the pair of stays of the headrest is provided with respect to a horizontal axis having a torque absorber at one end for damping a rotational force. It is attached so that it can rotate integrally and can move in the axial direction. Further, a holding portion that restricts the rotation of the stay at the headrest support position or the storage position, which is the initial position, and a rotation portion that ensures the rotation of the stay between the support position and the storage position. A guide piece having a guide groove having a combination of the above and a locking means capable of restricting the rotation of the stay by engagement with the stay at the other position of the headrest is disposed adjacent to the stay.

The first and second biasing means are respectively provided at predetermined positions, and the stays are biased in the guide groove direction and the initial position direction by the corresponding biasing means.

[0012]

[Action]

 According to this invention, the headrest is automatically returned to a predetermined initial position by the movement of the stay along the guide groove by the biasing force of the corresponding biasing means, so that the motor and various sensors are unnecessary. . Then, since the torque of the horizontal axis is attenuated by the torque absorber, the shock at the time of reaching the initial position is sufficiently suppressed by decelerating the swing speed of the headrest.

[0013]

【Example】

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

As shown in FIGS. 1 and 2, in the retractable headrest structure 10 according to the present invention, a horizontal flat shaft 14 is erected and rotatably supported between a pair of opposing side walls 12 a and 12 b of a base bracket 12. , And a torque absorber 16 capable of attenuating the rotational torque of the horizontal axis, and by integrally rotating the stay 18 with the horizontal axis, the headrest 20 can swing in the front-back direction with respect to the seat back 22. There is.

As shown in FIGS. 2 and 3, the headrest 20 is fixed to the upper end of the stay 18, for example, and is attached to the upper end of the seat back 22 of the rear seat via the slit 24. The headrest 20 is configured to be swingable between a support position that supports the seated person's head and a storage position that is set below the driver's rearward lower limit at the upper rear portion of the seatback 22. .

Here, in the present invention, the storage position of the headrest 20 is set to the rear portion of the upper end of the seatback 22 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 20 can swing in the front-back direction within a predetermined range from the supporting position to the rear.

As can be seen clearly in FIG. 2, the torque absorber 16 is connected to the extension end 14a of the horizontal shaft from the side wall 12a of the base bracket, for example. The torque absorber 16 includes, for example, a case body 16a fixed to the side wall 12a of the base bracket, and a clutch bearing 26 that is rotatable integrally with the horizontal shaft 14 with respect to the case body. Then, the fixed plate 28 integral with the case body 16a and the rotary plate 30 integral with the clutch bearing 26 are aligned in the highly viscous silicone oil 32 to prevent the clutch bearing from rotating. The torque absorber 16 is configured to damp the rotational force of the horizontal axis under the viscous resistance of silicone oil.

The configuration of the torque absorber 16 is well known, and the configuration itself is not the purpose of the present invention, and therefore will not be described in detail.

As shown in FIGS. 1 and 2, for example, a pipe-shaped holder 34 into which the horizontal shaft 14 can be loosely inserted is fixed to the lower ends of the pair of stays 18 of the headrest 20, respectively. Loosely inserted, and by fixing the locking pin 38 to the horizontal shaft through the long hole-shaped insertion hole 36 of the holder, the holder, that is, the stay, is aligned with the horizontal axis within the range of the insertion hole. It is connected to the horizontal shaft so that it can move in any direction and can rotate with the horizontal shaft.

Here, in such a configuration, the stay 18, that is, the headrest 20 is provided in either one of the axial direction of the horizontal shaft 14 and the seat by the first and second biasing means 40 and 42. The back 22 is offset in one of the front-back direction.

As the first biasing means 40, for example, a compression coil spring wound around the horizontal shaft 14 between the flange 34a of the holder 34 and the side wall 12b of the base bracket can be used, and the biasing force of the compression coil spring can be used. Under this condition, the stay 18 is biased in the direction of the side wall 12a (left side in the figure) of the base bracket with respect to the horizontal axis 14.

Further, as the second biasing means 42, for example, a torsion spring that is wound around the horizontal shaft 14 and locks each terminal to the locking pin 44 of the horizontal shaft and the base portion 12c of the base bracket 12 is used. Available. The second biasing means (torsion spring) 42 is configured to function as, for example, a return spring that returns the stay 18 to the support position of the headrest 20.

As shown in FIGS. 1 and 4, in this invention, for example, the side wall 12a of the base bracket is formed integrally with the guide piece 46. The guide piece 46 is, for example, a combination of a holding portion 48a that holds the stay 18 at the supporting position of the headrest 20 and a rotating portion 48b that ensures the rotation of the stay between the supporting position and the storing position. Is formed in the terminal. Then, under the pressing of the stay 18 by the biasing force of the first biasing means (compression coil spring) 40, the guide groove 48 of the guide piece 46 is defined so as to define the swing range of the stay, that is, the headrest 20. Is configured.

Here, on the other hand, that is, in the storage position of the headrest 20, the stay 18 is held by the locking means 50. The locking means 50 includes, for example, as shown in FIG. 5, a locking plate 52 that can be engaged with the stay 18 at the storage position of the headrest 20.

The lock plate 52 is pivotally mounted so as to project laterally (inwardly) from the guide groove 48 by, for example, a pivot pin 54, and restricts the rotation of the stay 18 in the retracted position at the projecting position. (See FIG. 5).

The lock plate 52 of the lock means is configured to be unlockable under the pulling operation of an operation lever (not shown) connected via the cable means 56. The operation lever is provided, for example, at a position where a seated person can operate the seat, for example, on the front surface of the seat cushion.

Reference numeral 58 in the figure denotes a return spring that biases the lock plate 52 in the initial position, that is, in the lock position. A compression coil spring can be used as the return spring 58, and the compression coil spring is wound between the wire 56a of the cable means 56 and is interposed between the lock plate 52 and the side wall 12a of the base bracket.

In such a configuration, the lock plate 52 is biased in the lock position direction under the biasing force of the return spring (compression coil spring) 58, and the lock can be unlocked by the pulling operation against the biasing force. Has become.

For example, the support position shown by the solid line in FIG. 3 is assumed to be the initial position of the headrest 20. As shown in FIGS. 2 and 4, at the supporting position of the headrest 20, the stay 18 enters the engaging portion and is retained by the retaining portion 48a of the guide groove under the biasing force of the first biasing means 40. ing.

When the headrest 20 is stored from such a state, first, the headrest 20 is moved against the biasing force of the first biasing means 40, as shown in FIGS. The stay 18 is pushed out from the side toward the center right side, and the stay 18 is withdrawn from the holding portion 48a of the guide groove as shown in FIG. Then, next, the headrest 20 is pushed backward, that is, toward the front in the drawing, and the headrest is stored under the movement of the stay 18 along the rotating portion 48b of the guide groove.

Here, when the stay 18 moves in the storage position direction along the rotating portion 48b of the guide groove, the lock plate 52 in the projecting position, that is, the lock position is pressed to ensure the passage of the stay. . Then, when the rotation of the stay 18 reaches the regulation position by the guide groove 48, almost simultaneously with this, the pressing of the lock plate 52 by the stay 18 is released, so that the lock plate is released under the biasing force of the return spring 58. The stay is locked in the retracted position of the headrest 20 by protruding from the lock groove 48 (see FIG. 5).

That is, in such a structure, the rotation of the stay due to the action of the biasing force of the second biasing means 42 is restricted by the engagement of the lock plate 52 with the stay 18 by the protrusion, and the headrest 20 is Holds in storage position.

Then, in such a retracted position of the headrest 20, if the operation lever is pulled against the biasing force of the return spring 58 and the lock plate 52 is rotated in the unlocking direction, FIG. As shown, the rotation of the stay 18 is released by the lock plate, and the stay becomes free. Therefore, the stay moves to the guide groove rotation portion 48b under the biasing force of the second biasing means 42. Try to rotate along.

At this time, in the present invention, since one end of the horizontal shaft 14 is connected to the torque absorber 16, the rotational force of the horizontal shaft, that is, the biasing force of the second biasing means 42 is transferred by the torque absorber. Attenuated. That is, the headrest 20 is returned not at the speed according to the biasing force of the second biasing means 42 but at the speed damped by the torque absorber, so that the stay 18 reaches the supporting position and reaches the end of the guide groove 48. Even if they come into contact with each other, they do not receive much shock.

Then, when the stay 18 is returned to the supporting position of the headrest 20 and aligned with the holding portion 48a of the guide groove as shown in FIG. 6, the stay is moved under the biasing force of the first biasing means 40. It is biased, moves to the left in the drawing, is engaged, and the stay is held at the supporting position of the headrest 20 by the holding portion of the guide groove (see FIG. 4).

As described above, in the present invention, it is possible to automatically swing the headrest 20 in one direction without using a motor. In other words, since the motor and various sensors are unnecessary, the structure of the retractable headrest structure 10 can be sufficiently reduced in cost. Therefore, the object to which the retractable headrest is attached is not limited to the power seat of a luxury car or the like, and can be widely expanded to a normal seat without a controller or the like, so that the retractable headrest structure 10 having excellent versatility can be provided.

The torque absorber 16 sufficiently damps the rotational force of the horizontal shaft 14, so that the rocking speed of the headrest 20 becomes slower, and the second biasing means 42 supports the second biasing means 42 under the biasing force. The shock when reaching the position is sufficiently suppressed. Therefore, smooth and natural swinging of the headrest 20 can be easily obtained, and safety and comfort of the seated person can be secured.

Further, in this invention, since the rear portion of the upper end of the seatback 22 is the storage position of the headrest 20, the retracted headrest does not project in the seating surface direction of the seatback. Therefore, the headrest 20 in the retracted position does not hinder the occupant of the seat occupant of the rear seat, and the safety and comfort of the occupant of the seat occupant can be reliably improved.

Further, since the lock means 50 can be unlocked under the rotation operation of the lock plate 52 via the cable means 56, the headrest 20 can be remotely operated. Therefore, the arrangement position of the operation lever is not limited, and, for example, a seated person can easily operate the seat in a comfortable posture.

Further, by utilizing remote control via the cable means 56, various variations can be developed in the retracting operation of the headrest. For example, if the cable means 56 is operably connected to the corresponding door and the unlocking operation of the locking means 50 is performed by opening the door, even if the headrest 20 is in the retracted position, the door is opened. As a result, the occupant's riding operation is not bothered because it automatically returns to the supporting position. Therefore, the comfort of the seat occupant of the rear seat is further improved.

Here, in the embodiment, the supporting position is set to the initial position of the headrest 20, and the headrest is automatically returned to the supporting position under the biasing force of the second biasing means 42. ing. However, conversely, with the initial position of the headrest 20 as the storage position, the headrest may be automatically stored under the pulling operation of the operation lever.

In this case, if an operating lever is provided at a position where the driver can operate, for example, the front of the seat cushion of the driver seat, the headrest 20 can be stored from the supporting position by the driver's operation. It can be used particularly effectively during safe driving.

Although the retractable headrest structure mounted on the rear seat is illustrated here, the invention is not limited to the rear seat, and the present invention may be applied to, for example, a headrest mounted on an assistant seat. In this case, the storage position of the headstock is set below the lower limit of the forward visibility of the seated person in the rear seat.

Further, the retractable headrest structure of the present invention is suitable for a vehicle seat, but is not limited thereto. For example, the present invention can be applied to other seats such as trains, airplanes and ships. Good.

The above-mentioned embodiments are for explaining the present invention, and do not limit the present invention in any way, and all the modifications and alterations made within the technical scope of the present invention are also applicable. It goes without saying that it is included in the invention.

[0046]

[Effect of device]

 As described above, according to the retractable headrest structure according to the present invention, since the motor etc. are not used, the structure can be inexpensive, and the mounting target is not limited to the power seat, and can be widely spread to ordinary seats without a controller. it can. Therefore, a retractable headrest structure with excellent versatility can be provided.

Since the torque absorber sufficiently attenuates the rotational force of the horizontal axis, the shock when reaching the initial position is sufficiently suppressed. Therefore, smooth and natural swinging of the headrest can be easily obtained, and safety and comfort of the seated person can be secured.

Further, since the rear portion of the upper end of the seatback is the storage position of the headrest, the stored headrest does not project in the seating surface direction of the seatback. Therefore, the headrest in the storage position does not hinder the rider of the rear seat occupant from riding, and the safety and comfort of the occupant while riding is surely improved.

Further, if the lock means is configured so that the lock can be released under the rotation of the lock plate via the cable means, the headrest can be remotely operated via the cable means. Therefore, it is possible to easily secure the operation of the seat with the headrest attached and the operation of the headrest linked to the opening of the door, etc., without complicating the operation of getting on the seat, and the occupant sitting The safety and comfort of the vehicle will be further improved.

If the headrest is set to the storage position and the headrest can be stored under the biasing force of the biasing means under the unlocking operation by the driver, the headrest can be operated by any operation of the driver. Since it can be stored, it can be used particularly effectively when the driver is driving safely.

[Brief description of drawings]

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

FIG. 2 is a schematic vertical sectional view of a retractable headrest structure.

FIG. 3 is a schematic perspective view from the rear of the seat back in which the retractable headrest is mounted.

FIG. 4 is a schematic partial front view of the retractable headrest structure in a supporting position of the headrest.

FIG. 5 is a schematic partial front view of the retractable headrest structure in the retracted position of the headrest.

FIG. 6 is a schematic partial front view of the retractable headrest structure in a holding release state at a supporting position of the headrest.

FIG. 7 is a schematic partial front view of the retractable headrest structure with the holding position of the headrest released.

[Explanation of symbols]

 10 Retractable headrest structure 12 Base bracket 14 Horizontal axis 16 Torque absorber 18 Stay 20 Headrest 22 Seat back 40 1st biasing means (compression coil spring) 42 2nd biasing means (torsion spring) 46 Guide piece 48 Guide groove 48a Holding Part 48b Rotating part 50 Lock means 52 Lock plate 56 Cable means 58 Return spring (compression coil spring)

Claims (5)

[Scope of utility model registration request] 1. In a retractable headrest structure capable of swinging between a support position for supporting a seated person's head and a storage position set below a lower limit of the field of vision, a rear end of an upper end of a seatback is stored in the headrest. A horizontal shaft, which has a torque absorber at one end, for damping the rotational force, is installed and pivotally supported between a predetermined pair of opposing walls, and the pair of stays of the headrest can rotate integrally with the horizontal shaft. In addition, the holding portion is attached so as to be movable in the axial direction and restrains the rotation of the stay at one of the initial position, the support position of the headrest and the storage position, and the stay between the support position and the storage position. A guide groove having a combination of rotating portions for ensuring rotation; locking means capable of restricting rotation of the stay by engagement with the stay at the other position of the headrest; Guide pieces are arranged adjacent to the stays, and the stays are respectively guided in the guide groove direction and the initial position direction under the biasing force of the first and second biasing means provided at predetermined positions. The headrest is automatically returned to the initial position under the biasing force of the second biasing means while the horizontal axis of the torque absorber is damped by unlocking the locking means at the other position of the headrest. When the stay is aligned with the holding portion of the guide groove, the stay is allowed to enter the holding portion under the first biasing force to automatically hold the headrest at the initial position. Type headrest structure. 2. A pulling means for an operating lever connected to a lock means, wherein the lock means is provided with a lock plate projecting from a guide groove and engageable with a stay under swinging by a biasing force of a return spring. The retractable headrest structure according to claim 1, wherein the retractable headrest structure is configured to be unlocked under operation. 3. The retractable headrest structure according to claim 2, wherein a support position of the headrest is an initial position, and an operation lever of a locking means is provided at a position where a seated person can operate the headrest. . 4. A lock means is provided so that a support position of a headrest is an initial position and an operation lever is formed and arranged so as to be interlocked with opening of a door corresponding to the seat, and unlocking is possible under opening of the door. The retractable headrest structure according to claim 2, wherein the retractable headrest structure is connected via cable means. 5. The retractable headrest structure according to claim 2, wherein the headrest is mounted on the rear seat, the retracted position of the headrest is set as an initial position, and the operation lever of the lock means is provided at a position where a driver can operate.