JPS6310771Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a headrest device that can simultaneously adjust the longitudinal movement and angle of the headrest of a seat attached to vehicles such as automobiles and trains, aircraft, ships, etc. by operating a single lever.

Conventionally, the headrest attached to the top of the seatback of a seat can be moved forward and backward, adjusted in angle, and adjusted in height, but each adjustment mechanism has been attached for each individual adjustment, making it cumbersome to operate and make adjustments. Not only is it difficult to do so, but the headrest itself also has the drawbacks of having a complicated mechanism and increasing weight.

The present invention solves the conventional drawbacks by providing a headrest device that can be moved forward and backward and adjusted in angle by operating a single lever. A lock bracket is rotatably attached to the hinge pin and has a partially recessed recess that opens upward, a fixed side rail attached to this lock bracket, and a headrest frame attached to the lock bracket that slides onto the fixed side frame. A movable side rail that is movably supported and has a stopper and a downwardly open lock hole formed at appropriate intervals in the longitudinal direction, and a wedge block having a tapered surface are connected and slidably attached to the lock bracket. and a guide plate energized by a return spring; an operating lever rotatably attached to the guide plate and formed with a locking piece that engages with the stopper of the movable rail; and an operating lever that engages with the stopper pin from below. An angle adjustment plate having engaging recesses bored at appropriate intervals is attached to the end of the lock rod so as to be vertically movable in the recessed recesses of the lock bracket. When the wedge block of the guide plate pushes up the lock rod, the lock rod engages in the lock hole of the movable rail, and the engagement recess of the angle adjustment plate engages with the stopper pin of the fixed frame. In addition, the angle and longitudinal adjustment of the headrest frame are locked.

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

FIG. 1 is a perspective view of essential parts of an embodiment of the present invention, and FIG. 2 is a perspective view showing the appearance of the headrest device. The present embodiment illustrated in these is as follows.
A fixed frame 11 with a stopper pin 12 protruding toward the headrest, a lock bracket 8 pivotably attached to the fixed frame 11, a fixed rail 5 fixed to the lock bracket 8, and a fixed side rail 5 fixed to the lock bracket 8. A movable side rail 4 that is slidably attached to the rail, a headrest frame 1 that is attached to the movable side rail 4, and a headrest frame 1 that is inserted into the headrest frame 1 and suspended horizontally and attached to the angle adjustment plate 13. The main part is formed by the lock rod 2.

The fixed frame 11 has a lower part connected to the frame of the seat back 31 of the seat shown in FIG. A hinge pin 10 is attached that serves as the center of rotation of the head rest 32. The lock bracket 8 is rotatably supported by the hinge pin 10, and includes a main plate 8a bent into a U-shape, and a fixing plate 8b fixed to the main plate 8a by screws, welding, etc.
It is made up of. The fixed side rail 5 is formed by bending a long plate into a substantially rectangular shape with an upward opening, and is fixed to the fixed plate 8b of the lock bracket 8 by means of screws or the like. It is designed to rotate as a unit. The movable rail 4, which is slidably supported by the fixed rail 5, is an elongated L-shaped plate inserted into the upper opening of the fixed rail 5, and has a bent side on the lock bracket 8 side. A plurality of substantially circular lock holes 7 are bored at appropriate intervals in the lower end of 4a, and stoppers 6 curved in an F-shape are similarly attached at appropriate intervals to the upper part of the same side 4a. There is. The headrest frame 1, which is the aggregate of the headrest 32, is attached to the upper part of the movable side rail 4 formed in this way, and the headrest can be adjusted back and forth by sliding the movable side rail 4 on the fixed side rail 5. It's becoming possible.

On the other hand, the main plate 8a of the lock bracket 8 has two horizontally long slits 8c, 8c on the left and right.
The shaft 15a of the guide plate 15 is opened in a U-shape in the slits 8c, 8c.
15a are inserted and engaged with each other, so that the guide plate 15 is attached so as to be able to slide slightly back and forth inside the lock bracket 8. This guide plate 15 is formed in a U-shape.
At one end (the right end in FIG. 1), a wedge block 9 having a pointed shape and a tapered surface is integrally connected, and a pin 16 is attached to the upper side of the guide plate 15. An operating lever 3 rotatably supported at is attached. Even after the cushioning material and skin are attached to the headrest frame 1 and the headrest is formed, the operating lever 3 remains exposed from one side of the headrest 32 as shown in FIG. An operation to release the lock is performed when adjusting the headrest, and as shown in FIG. The lock piece 17 engages with the lock piece 6. In addition, on the other side of the lock bracket 8 where the wedge block 9 is not connected, as shown in FIGS. 3 and 4, the lock bracket 8 is placed in the anti-lock direction (rightward in FIGS. 3 and 4). A return spring 14, which is a tension coil spring, is attached to the headrest and acts to facilitate unlocking of the headrest and facilitate operation. Furthermore, as shown in FIGS. 5 and 6, the fixing plate 8b of the lock bracket 8 is formed with a recessed recess 18 that opens upward, and the locking plate 8b of the lock bracket 8 is formed with a recessed recess 18 that opens upward. A locking rod 2 is inserted and the structure is suspended horizontally.

This lock rod 2 is for locking the front and rear adjustment and angle adjustment of the headrest, and for this purpose, it is inserted into the lock hole 7 from the bottom and engaged, and at its end there is a fan-shaped angle adjustment plate 12. hangs down and is integrally attached, and this angle adjustment plate 12
An engagement slit 20 in which a plurality of engagement recesses 19 are arranged at appropriate intervals is formed in the lower part of the frame, so that the engagement recesses 19 engage with the stopper pin 12 protruding from the fixed frame 11 from below. It's getting old.

In the figure, reference numeral 21 denotes a tension spring attached to bias the operating lever 3 in the locking direction.

The case of adjusting the front and back and angle of the headrest 32 in this embodiment configured as described above will be explained with reference to FIGS. 3 to 6.
In this case, FIG. 5 corresponds to FIG. 3, and FIG. 6 corresponds to FIG. 4, and shows the same state, but FIGS. This is a case where the plate 8a is not shown.

First, when the operating lever 3 is rotated clockwise to release the engagement between the lock piece 17 and the stopper 6,
The guide plate 15 is moved to the right by the return spring 14 and becomes the state shown in FIGS. 4 and 6. In this state, the lock rod 2 is released from being pushed up from the wedge block 9, falls into the recessed recess 18 of the lock bracket 8 under its own weight, and is disengaged from the lock hole 7. Angle adjustment plate 15 fixed to rod 2
has also lowered, and the engagement between the engagement recess 19 and the stopper pin 12 is also released. Therefore, the movable side rail 4 can be slid back and forth, and the lock bracket 8 is also rotatable around the hinge pin 10 of the fixed frame 11, so that the headrest frame 1 can be moved back and forth, and It is possible to change the angle.

Next, when the movable rail 4 slides in the direction shown by the arrow in FIGS. 3 and 5, and the stopper 6 contacts and engages the lock piece 17 of the operating lever 3, the guide plate 15 is moved by this contact force. The lock bracket 8 is moved to the left, and the wedge block 9 connected to the right end of the guide plate 15 pushes the lock rod 2 upward along its tapered surface, thereby opening the lock rod 2 to the movable rail 6. The lock rod 2 is inserted into and engaged with the lock hole 7 of the next stage, and the sliding of the movable side rail 6 is stopped. At the same time, the angle adjusting plate 13 is also moved upward so that one of the engaging recesses 19 engages with the stopper pin 12, and the rotation of the lock bracket 8 is also stopped, resulting in the state shown in FIGS. 3 and 5. , the headrest 32 is locked.

Therefore, according to this embodiment, the headrest can be adjusted forward and backward by only operating the operating lever 3, so that the adjustment of the headrest is extremely simplified and the operability can be improved.
In addition, both can be adjusted with a single adjustment mechanism,
Since individual adjustment mechanisms for front and rear adjustment and angle adjustment are not required, the headrest itself can be simplified and made lighter, making it suitable for mass production and available at low cost. becomes.

Note that the present invention is not limited to the above-mentioned embodiments, and can be modified in various ways without departing from its technical scope.For example, the lock bracket may not be formed of a U-shaped main plate and a fixing plate. The operating lever may be formed from a single plate bent into a square shape, the return spring may be connected to the wedge block side, or the operating lever may not be formed into a rectangular shape but the lock piece may protrude. Furthermore, the guide plate may be formed into a circular or annular shape instead of a U-shape, and the angle adjustment plate may also be formed into a rectangular shape such as a triangle instead of a fan shape. It may be formed into a shape. In these cases as well, effects similar to those of the above embodiments can be obtained.

As described in detail above, according to the present invention, it is possible to provide a headrest device that allows forward and backward movement adjustment and angle adjustment by operating a single lever, and does not require a complicated mechanism.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts of an embodiment of the present invention, FIG. 2 is a perspective view of the overall appearance, and FIGS. 3 to 6 are side views showing the operation. 1...Head rest frame, 2...Lock rod, 3...Operation lever, 4...Movable side rail, 5
... Fixed side rail, 6 ... Stopper, 7 ... Lock hole, 8 ... Lock bracket, 9 ... Wedge block, 10 ... Hinge pin, 11 ... Fixed frame, 12 ... Stopper pin, 13 ... Angle adjustment Plate, 14... Return spring, 15... Guide plate, 17... Lock piece, 18... Recessed recess, 19... Engagement recess.

Claims (1)

[Scope of utility model registration request] A lock bracket that is rotatably attached to a hinge pin of a fixed frame with a protruding stopper pin and has a partially open recessed recess, a fixed side rail attached to this lock bracket, and a head rest frame. A movable side rail is attached and slidably supported on the fixed side rail, and a movable side rail has stoppers and downwardly open lock holes formed at appropriate intervals in the longitudinal direction, and a wedge block having a tapered surface is connected to the movable side rail. a guide plate that is slidably attached to the lock bracket and energized by a return spring, and a lock piece that is rotatably attached to the guide plate and engages with the stopper of the movable side rail. An operating lever and an angle adjustment plate having engaging recesses bored at appropriate intervals that engage with the stopper pin from below are attached to hang down from the end, and are movable up and down into the recessed recesses of the lock bracket. When the wedge block of the guide plate pushes up the lock rod, the lock rod engages in the lock hole of the movable rail and engages with the stopper pin of the fixed frame. A headrest device characterized in that the engagement recess of the angle adjustment plate engages to lock the angle and longitudinal adjustment of the headrest frame.