JPH0523092Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to a seat headrest, and particularly relates to an improved technique for a structure that allows the headrest to be moved back and forth.

<<Prior Art>> Headrests used in vehicle seats have a structure that can be adjusted up and down, but also have a structure that allows them to be moved forward and backward to match the rear posture of the occupant.

In the headrest of this structure, as shown in FIGS.
The headrest main body 3 is provided so as to be tiltable, and the headrest main body 3 is held so as to be tiltable back and forth by rotating the angle adjustment knob 4 protruding from the side of the headrest main body 1, so that the headrest main body 3 can be substantially moved back and forth. It is in the same state as it was before, and the posture is adjusted accordingly.

<<Problem to be solved by the invention>> However, with this longitudinal adjustment mechanism, when the headrest main body 3 is tilted forward, it changes from the optimal position of surface contact to line contact with the back of the occupant's head, as shown in the figure. However, it had the disadvantage of being less comfortable.

The purpose of this invention is to improve the above-mentioned drawbacks, and the object is to provide a seat headrest that does not tilt the headrest main body during longitudinal movement adjustment and can ensure surface contact.

<Means for Solving the Problems> In order to achieve the above object, this invention provides a seat headrest consisting of a stay projecting from the upper part of the seat bag and a headrest main body connected to the stay so as to be movable back and forth. A guide member having a U-shaped cross section formed in an arc shape along the front-rear direction is provided inside the headrest main body, while the tip of the stay is bent into an L-shape, and the bent portion is connected to the corner of the guide member. A stopper piece for preventing rotation is provided at the lower part of the bent part and engages with the lower part of the guide member, so that the guide member is slid together with the bent part in a state where the guide member is sandwiched therein. possible connections.

<<Operation>> According to the above configuration, the guide member slides while being sandwiched between the bent end of the stay and the protrusion and moves in the front-rear direction, so that the tilting movement accompanying the movement of the headrest main body is prevented. It is possible to maintain a face-to-face condition without any problems.

<<Example>> Hereinafter, an example of this invention will be described in detail using the drawings.

In FIGS. 1 and 2, 10 is a seat bag, 12 is a pair of headrest stays projecting from the top of the seat bag 10 so as to be movable up and down, and 14 is a headrest main body coupled to the top of the stay 12.

The headrest main body 14 is made by covering the outer periphery of a pillow-shaped metal frame with an outer skin through a soft member such as a pad (both are not shown). A guide member 16 coupled to the upper end of each stay 12 is provided.

The guide member 16 is formed in an arc shape along the front-rear direction, and has a guide groove 16a having a U-shaped cross section.

Further, a large number of holes 18 for stoppers are formed in the upper guide surface 16b of the guide member 16 and are arranged vertically along the guide surface 16b.

On the other hand, the upper end of the stay 12 is bent outward, and this bent portion 12a fits inside the guide groove 16a of the guide member 16.

A ball-shaped stopper 20 is disposed above the bent portion 12a, and as a result of being constantly urged in the projecting direction by a spring 22 interposed inside, the stopper 20 is fitted into the guide groove 16a. In the mated state, this stopper 20 elastically engages with each hole 18 to restrict relative sliding movement.

Further, at the lower part of the bent portion 12, a stopper piece 24 for preventing rotation is integrated with the vertical portion of the stay 12 orthogonally thereto by welding or the like.

The stopper piece 24 fits into a second guide groove 16c having a U-shaped cross section formed at the bottom of the guide member 16, and inserts the guide member 16 between it and the bent portion 12a. The situation is as follows.

As described above, the headrest main body 14 is connected to the upper and lower sides of the guide member 16 by fitting the bent portion 12a of the stay 12 and the stopper piece 24 so as to be slidable in the front-rear direction.

Therefore, in the headrest having the above structure, the guide member 1 is as shown in FIGS.
Even when the headrest main body 14 is moved along the circular arc of 4, the headrest main body 14 can maintain a vertical state (or the same angular posture), and an optimal surface contact state can be maintained.

In addition, when moving, the headrest main body 14
By forcibly moving the stopper 20 forward or backward with the handle, the stopper 20 is elastically unlatched from the hole 18, moves to the next hole 18, makes a click sound, and is elastically unlatched again. The head rest main body 14 is fixed in this position.

In the embodiment, the stopper mechanism is a resilient engagement between the ball-shaped stopper and the stopper hole described above, but it is of course possible to employ other stopper mechanisms.

<<Effects of the invention>> As explained in detail using the embodiments above, the seat headrest according to this invention has the following effects:
Since the guide member slides between the bent part of the stay and the protrusion and moves in the front-back direction, there is no tilting movement associated with the movement of the headrest body, and the state of surface contact can be maintained. , there is no line hit like the conventional rotation adjustment type, and comfort can be maintained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the headrest according to this invention, Fig. 2 is a partial perspective view showing the engagement relationship between the guide member and the stay, and Figs. 3a and 3b are the postures of the headrest main body when adjusting the headrest forward and backward movements. FIGS. 4a and 4b are explanatory side views showing defects in the conventional headrest. DESCRIPTION OF SYMBOLS 10... Seat bag, 12... Headrest stay, 12a... Bent part, 14... Headrest main body, 16... Guide member, 24... Stopper piece.

Claims (1)

[Scope of utility model registration request] A seat headrest consisting of a stay projecting from the upper part of a seat bag and a headrest body coupled to the stay so as to be movable back and forth, the headrest having an arcuate cross-section formed along the front-rear direction inside the headrest body. The tip of the stay is bent into an L-shape, and the bent part is fitted into the U-shaped cross section of the guide member, and the lower part of the guide member is provided at the bottom of the bent part. 1. A headrest for a seat, characterized in that a stopper piece for preventing rotation is provided which engages with the bending portion, and is slidably connected to the bent portion in a state where the guide member is sandwiched therebetween.