JPH0576352U - Headrest support structure - Google Patents

Abstract

(57) [Summary] [Purpose] When the seat back is tilted backward to form a full-flat seat surface, the headrest can be moved to an unobtrusive position with a simple operation, and in normal use, Make sure that the headrest can be supported stably. [Structure] In normal times, a supporting rod 6 that supports the headrest 5
Is in the use position and is locked in that position by the locking means 14. When the lock means 14 is unlocked by operating the operation means 13a, the headrest 5 can be rotated together with the support rod 6 to a folding position facing rearward. When the seat back 2 is tilted backward in this state, the seat back 2 can freely rotate to the full flat position without the headrest 5 coming into contact with the rear seat.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a headrest support structure for a vehicle seat.

[0002]

[Prior Art]

 The conventional headrest is supported on the upper ends of a pair of left and right supporting rods protruding from the upper end of the seatback, and the height of the headrest can be adjusted by adjusting the protruding amount of the supporting rods with respect to the seatback. What is done is common.

[0003]

[Problems to be solved by the device]

 However, with the conventional headrest support structure as described above, when it is desired to tilt the seat back of the front seat rearward to obtain a substantially horizontal, so-called full-flat seat surface by the front seat and the rear seat, a headrest is used. Even if the car is placed closest to the seat back, there is a problem in that the headrest overlaps with the seat cushion of the rear seat, which is an obstacle.

Therefore, in such a case, the headrest may be detached from the seat back. However, in this case, the attachment and detachment of the headrest becomes troublesome, and a storage place for the detached headrest must be considered. There are problems such as having to do it.

In view of the above problems of the conventional technique, the present invention obstructs the headrest with a simple operation when the seat back is tilted backward to form a full flat seat surface. The purpose of the present invention is to provide a support structure for a headrest that can move to a position where it does not come into contact with the headrest and that can stably support the headrest under normal use conditions.

[0006]

[Means for Solving the Problems] In order to achieve the above object, a support structure for a headrest according to the present invention comprises a support frame fixed to a seat back, and a lower end portion of a supporting rod for supporting the headrest at an upper end portion in a lateral direction. By pivotally attaching the supporting shaft, the supporting rod can be pivoted between a use position in which the supporting rod is directed substantially upward and a folding position in which the supporting rod is directed rearward, and the supporting rod is locked at least in the using position. Is provided on the support frame, the locking means is linked to an operating means provided at a proper position on the outer surface of the seat back, and the locking means can be unlocked by operating the operating means.

The locking means intervenes between the front edge of the lower end of the support rod and the rear surface of the front plate of the support frame when the support rod is in the use position, so that the lock member moves from the use position of the support rod to the folded position. It is preferable to provide a lock plate mounted on the support frame so as to be movable between a lock position for preventing the pivot in the direction and an unlock position apart from the pivot locus of the lower end of the supporting rod.

[0008]

[Action]

 In normal times, the support rod that supports the headrest is located in the use position and is locked in that position by the locking means, so that the headrest is securely held in a state of protruding above the seat back. When the operating means is operated to unlock the locking means, the headrest together with the supporting rod can be rotated to a folding position that faces rearward.If the seatback is tilted backward in this state, the headrest will be released. It can freely rotate to the full flat position without contacting the rear seats.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a seat for a driver's seat of a passenger car, and a seat back 2 can be tilted rearward with respect to a seat cushion 3 by a known reclining mechanism (not shown). There is.

A support frame 4 including a front plate 4a and a pair of left and right side plates 4b extending rearward from both side ends of the front plate 4a is fixed in the seat back 2.

Between the both side plates 4b of the support frame 4, the lower ends of a pair of left and right supporting rods 6 that support the headrest 5 at their upper ends are pivotally attached by a substantially horizontal shaft 7 that faces the left and right directions. As shown by the solid line in FIG. 1, the rod 6 faces substantially upward and is in a use position for supporting the headrest 5 above the seat back 2, and as shown by an imaginary line in FIG. It can rotate to a folding position that extends rearward.

The distance D1 from the center 0 of the shaft 7 to the lower end of both supporting rods 6 is set to be larger than the distance D2 from the center 0 of the shaft 7 to the leading edge (D1> D2).

A long hole 8 is formed in the support frame 4 slightly forward of the shaft 7 of the both side plates 4b. The long hole 8 is oriented in the up-down direction. Both ends of the lock plate 9 are oriented in the left-right direction. Is slidably fitted in the upper and lower directions.

As shown by the solid line in FIG. 1, the lock plate 9 engages with the lower end of the elongated hole 8 and slides on the front surface of the lower end of both supporting rods 6 when the rear surface is in the use position. A lock position that prevents the support rod 6 from rotating in the folding position direction from the use position, and as shown by the phantom line in FIG. 1, engages with the upper end of the elongated hole 8 and the lower end from the shaft 7. By being positioned above the distance D2 by substantially the same distance D2 ', it is possible to move the lower ends of the two supporting rods 6 from the use position to the unlock position that allows the pivoting to the folding position.

A reinforcing plate 10 that is in sliding contact with the rear surface of the front plate 4a of the support frame 4 is fixed to the front surface of the lock plate 9 in front of both supporting rods 6, and when the supporting rods 6 are in the use position, the supporting rods 6 are supported. Since the lock plate 9 and the reinforcing plate 10 are sandwiched between the lower end of the headrest 6 and the front plate 4a, the supporting strength of the supporting rod 6 when the rearward load is applied to the headrest 5 is provided. It is designed to be large.

A tension coil spring 12 having a relatively small spring constant is stretched between the center of the lower portion of the lock plate 9 and the pin 11 projecting at the lower center of the front plate 4 a of the support frame 4, and the lock plate 9 Is always urged downward.

At the center of the upper portion of the lock plate 9, a lower end portion of a knob rod 13 that faces upward is screwed. A knob 13a is fixed to the upper end of the knob rod 13 and serves as an operating means protruding from the upper end of the seat back 2.

Thus, the lock plate 9, the reinforcing plate 10, the tension coil spring 12 and the like form the lock means 14 that locks the support rod 6 at least in the use position.

According to this embodiment, when the knob 13a is pulled up against the biasing force of the tension coil spring 12, the lock plate 9 is raised from the lock position to the unlock position via the knob rod 13. As a result, there is nothing to prevent the lower ends of both supporting rods 6 from rotating, so that both supporting rods 6 can freely rotate from the use position shown by the solid line in FIG. 1 to the folding position also shown by the imaginary line. You can

When both supporting rods 6 are rotated to the folding position, the front lower front edge of the original lower end portion thereof abuts the lower end of the lock plate 9 to prevent further rotation of both supporting rods 6. It

When the seat back 2 is tilted rearward as shown in FIG. 3 in a state where both the supporting rods 6 are held in the folded position, the seat back 2 has the headrest 5 and the seat cushion of the seat 15 at the rear. It is possible to freely rotate to a full flat position without abutting on 16.

At this time, the headrest 5 is brought into contact with the floor 17 between the front seat 1 and the rear seat 15, and the supporting rods 6 support the load of the seatback 2. You can also

When the seat back 2 is returned to the original standing position and both supporting rods 6 are rotated to their original use positions, the lock plate 9 and the knob rod 13 are pulled down to the lock position by the urging force of the tension coil spring 12. After that, both supporting rods 6 are securely locked so as not to fall behind by delusion.

As shown in FIG. 4, when the lock plate 9 is pulled up to the unlock position, the engagement step portion 18a engages with the lower edge of the lock plate 9 so that the lock plate 9 is elastically held. The elastic engaging means 18 composed of a leaf spring is provided at a proper position on the rear surface of the front plate 4a of the support frame 4, and, for example, both the supporting rods 6 suddenly return to the use positions while the seat back 2 is tilted backward. You may choose not to do it. The holding force of the lock plate 9 at the unlocked position by the elastic engaging means 18 is slightly larger than the downward biasing force of the lock plate 9 by the tension coil spring 12 and is only enough to be released by merely depressing the knob 13a. It's good to leave.

[0026]

[Effect of the device]

 According to the present invention, when the seat back is tilted backwards to form a full flat seat surface, the headrest can be moved to an unobtrusive position by a simple operation, and the headrest is stabilized under normal use. Therefore, it is convenient and practical.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an essential part of an embodiment of the present invention.

FIG. 2 is a perspective view of the same main portion.

FIG. 3 is a schematic side view showing a state in which a seat back of a seat according to an embodiment of the present invention is folded down.

FIG. 4 is a vertical sectional side view of a main part showing a modified example of the present invention.

[Explanation of symbols]

 1 Seat 2 Seat Back 4 Support Frame 5 Headrest 6 Support Rod 9 Lock Plate 12 Tension Coil Spring 13 Novlot 13a Knob (Operating Means) 14 Locking Means 18 Elastic Engaging Means D1, D2, D2 'Distance 0 Center of Shaft

Claims (1)

[Scope of utility model registration request] 1. A support frame fixed to a seat back, and a lower end portion of a supporting rod for supporting a headrest at an upper end portion thereof is pivotally attached by a shaft oriented in the left-right direction, so that the supporting rod can be positioned substantially upward. , A locking means for locking the supporting rod at least in a use position is provided on a support frame, and the locking means is linked to an operating means provided at a proper position on the outer surface of the seat back, Then, the support structure for the headrest, wherein the lock means can be unlocked by operating the operation means.