JPS6341964Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a movable headrest device, and more particularly, to a movable headrest device that can adjust the position of the headrest back and forth and also adjust the inclination angle of the headrest at the same time.

[Prior art]

Generally, the headrest provided at the upper part of the seat backrest is adjustable in the vertical direction, but is often fixed in the front and back direction. Therefore, depending on the body shape of the seated person, there may be a distance between the headrest and the head, which is not only uncomfortable for the seated person, but can also be extremely dangerous if a sudden impact is applied. It was hot. Due to these circumstances, a device was devised in which the headrest could be moved back and forth. As shown in FIG. 1A, the headrest 200 moves parallel to the backrest 100. In this type of headrest device, a headrest 200 shown in FIG.
For example, when the headrest 200 is moved forward from a neutral state, the headrest 200 moves parallel, but the seater's head does not move parallel but rotates around the neck, so the first Diagram C
As shown in Figure 2, the back of the head no longer comes into contact with the entire surface of the headrest 200, which is not only uncomfortable for the seater but also poses a safety problem.

[Purpose of invention]

The present invention has been devised in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a movable headrest device with a novel configuration in which the headrest can be moved back and forth and the inclination angle can be adjusted using a link mechanism.

〔Example〕

The invention will now be described with reference to preferred embodiments shown in the drawings.

FIG. 2 shows an exploded perspective view of a movable headrest device 10 which is an embodiment of the present invention. The movable headrest device 10 includes stays 1 and 1' that are inserted into the upper part of the seat backrest, and a U-shaped fixing member 2 that is fixed to the upper ends of these stays 1 and 1'. Lower end portions of a pair of links 3 and 4 are rotatably fixed to a portion of the fixed member 2 that corresponds to one horizontal bar of the U-shape. The upper ends of the links 3 and 4 are rotatably attached to a box-shaped support member 7 via rotation shafts 5 and 6. Links 3 and 4 are link 3
The distance between the upper part and the link 4 is set to be different between the upper part and the lower part. Specifically, the distance between the links 3 and 4 in the fixed member 2 is set to be smaller than the distance in the support member 7. Also, on the other side of the lowering member 2, links 3, 4, rotation shaft 5,
6 and a support member 7 are provided, and a headrest frame 8 is fixed to the support member 7 at both ends.
In other words, the headrest frame 8 is
It is attached to the side via links 3 and 4, and is configured to be movable in the front and back direction relative to the stays 1 and 1'. Further, as shown in FIG. 3, a shaft 9 is attached to the upper end of the link 3 attached to one side of the fixing member 2, and the shaft 9 rotatably passes through the support member 7.
The ends of are fixed. The tip of the shaft 9 is formed into a hollow pipe shape, and the rotation shaft 5 is located inside, so the link 3 rotates together with the shaft 9 while remaining rotatably fixed to the support member 7. It's starting to move. Furthermore, shaft 9
It may be the link 4 that is attached. Further, a rotation adjustment mechanism 50 for rotating and fixing the shaft 9 is provided on the opposite side of the shaft 9 from the link 3, and this rotation adjustment mechanism 50 will be described later.

Next, the operation of the movable headrest device 10 configured as described above will be explained. First, when the rotation of the shaft 9 is restricted, the links 3 and 4 between the fixed member 2 and the support member 7 cannot move because the shaft 9 fixed to the link 3 is fixed. Therefore, the headrest frame 8 is held in place. Furthermore, when the shaft 9 is rotated, for example in the direction of arrow a in FIG.
The upper end of the link 3 to which is fixed is rotated in the direction of arrow a. When the link 3 rotates, the support member 7 moves with a slight rotation in the direction of arrow b, resulting in the state shown in FIG. 5. If the shaft 9 is further rotated in the direction opposite to the arrow a direction, the link 3 is rotated and the support member 7 is moved in the opposite direction to the arrow b. Note that a headrest frame 8 is attached to the support member 7 and is adapted to be moved together with the support member 7.

Further, an example of a rotation adjustment mechanism for rotating and fixing the shaft 9 will be explained based on the drawings from FIG. 6 onwards. The rotation adjustment mechanism is the shaft 9.
Any mechanism may be used as long as it can rotate and fix the rotation adjustment mechanism 50, and is not limited to the rotation adjustment mechanism 50 described below. As shown in FIG. 6, a lock gear 70 having triangular chevron teeth is fixed to the support member 7 to which the headrest frame 8 is attached, and the shaft 9 passes through a center hole 71 of the lock gear 70. There is. Note that the middle part of the shaft 9 is a ring part 9a having a larger diameter than both ends.
A is formed to have a larger diameter than the center hole 71 of the lock gear 70 and is in contact with the lock gear 70. Furthermore, the center portion of a disc-shaped adjustment member 80 is fixed to the opposite side of the ring portion 9a from the lock gear 70. The adjustment member 80 has curved elongated holes 82 and 83 formed at opposing positions through the insertion hole 81 . The elongated holes 82 and 83 are formed concentrically with the adjustment member 80, and the elongated hole 83 is formed to have a larger width. In addition, the insertion hole 8 of the elongated hole 82 of the adjustment member 80
Small holes 84, 85 are bored on the opposite side from 1, and rod-shaped locking members 86, 87 are inserted into these small holes 84, 85.
is rotatably mounted. Lock member 8
6, 87 have orthogonal rotation shafts 86a,
87a are integrally formed, and rotation shafts 86a,
One end of 87a is rotatably fitted into the small holes 84, 85. Further, the other ends of the rotation shafts 86a and 87a are connected to small holes 88 formed in a curved holding member 88.
a, 88b, and the holding member 88 is attached to the adjusting member 80 by screwing or the like, and the locking member 88
6 and 87 are held between the adjustment member 80 and the holding member 88. The lock members 86 and 87 arranged in this manner are positioned such that their lower ends fit into the lock gear 70, and are arranged so that they are always fitted with the lock gear 70 by means of a spring or the like. has been done. Further, a disk-shaped rotating member 90 is rotatably inserted through the shaft 9. Rotating member 9
0, pins 91, 92 and a thick pin 93 are fixed to the long hole 82, respectively.
is arranged so that it is located within the elongated hole 83.
A beam member 94 is fixed to the opposite side of the rotating member 90 from the pins 91, 92, 93, and this beam member 94
A knob 95 is fixed to the holder, so that when the knob 95 is rotated, a rotating member 90 is also rotated.

The operation of the rotation adjustment mechanism 50 configured as described above will be explained. The state shown simply in FIG. 7A is a state in which the knob 95 is not rotated, and the shaft 9 is fixed. In order to rotate the shaft 9 from this state, the knob 95 can be turned. For example, in FIG. 7, in order to rotate the shaft 9 in the counterclockwise direction, the knob 95 may be turned to rotate the rotating member 90 in the counterclockwise direction. When the rotating member 90 rotates, the pins 91, 92, and 93 also rotate counterclockwise. When the pin 91 rotates counterclockwise, it pushes the lock member 86 and disengages the lock member 86 from the lock gear 70 (see FIG. 7B).
The pin 91 that has pushed the lock member 86 comes into contact with the end of the long hole 82, but the pins 91 and 93 are moved so that the pin 93, which was rotating together with the pin 91, also comes into contact with the end of the long hole 83. It is arranged. If the knob 95 is further turned from the state in which the lock member 86 and the lock gear 70 are disengaged, the adjusting member 80 is also rotated by being pushed by the pins 91 and 93.
When the adjustment member 80 is rotated counterclockwise, the lock member 87 moves around the lock gear 70 while repeating the operation of overcoming the triangular chevron teeth of the lock gear 70 and engaging the next tooth. Around,
Adjustment member 80 can be rotated counterclockwise. The shaft 9 is fixed to the adjustment member 80 and is rotated counterclockwise together with the adjustment member 80 . To further rotate the shaft 9 clockwise, rotate the knob 95 clockwise to rotate the rotating member 90 clockwise, and this rotation pushes the locking member 87 with the pin 92. Lock gear 7
0, and the adjustment member 80 is also rotated clockwise (see FIG. 7C). Further, when an external force is applied to the shaft 9, if there is even a slight movement of the shaft 9, the adjusting member 80 rotates and the locking members 86 and 87 engage with each other, so that the shaft 9 becomes fixed.

Therefore, according to this embodiment, since the distance between the pair of links is made different, when the knob 95 is rotated counterclockwise to rotate the shaft 9, the support to which the headrest frame 8 is attached is rotated. The part member 7 does not move in parallel toward the front, but performs a forward tilting motion centering on the side of the fixed member 2 to which the stay 1 is attached, so that it can be adapted well to the movement of the neck of the seater. I can do it.

In the above embodiment, the distance between the link 3 and the link 4 was set such that the distance at the fixing member 2 was smaller than the distance at the support member 7, but the reverse may be used, and as required. need not be parallel links. Further, other configurations are not limited to the above embodiments.

As explained above, the present invention consists of a headrest frame that constitutes a headrest, a stay attached to the upper part of the seat back, and one end of which is rotatably attached to the headrest frame and the other end to the stay. Consisting of a pair of links and a shaft that is rotatably fixed to the head rest frame and fixed to one end of either of the links and rotates together with the link, the link of the pair of links and the shaft The distance between the two is made different between the headrest frame side and the stay side. Therefore, by a simple operation, the headrest can be tilted in a manner that closely matches the movement of the seater's neck, rather than being moved in parallel in the front-rear direction, and the above-mentioned drawbacks of the prior art can be overcome. In particular, since the headrest moves while changing its inclination angle as the seater's head moves, it is possible to provide a comfortable contact feeling to the seater's head. In addition, if the rotation of the shaft is restricted, the links will not move easily and the headrest frame will be held.If a simple mechanism is provided to restrict the rotation of the shaft, the movement of the headrest frame and This allows for easy retention, simplification of the entire device, and cost reduction.

[Brief explanation of the drawing]

1A to 1C are side views showing a conventional headrest device, FIG. 2 is an exploded perspective view showing an embodiment of the present invention, FIG. 3 is a perspective view showing main parts of the present invention, FIG. 5 is an explanatory view showing the operation of the present invention, FIG. 6 is an exploded perspective view of the rotation adjustment mechanism, and FIGS. 7A to C are simplified front views illustrating the operation of the rotation adjustment mechanism. 1, 1'...Stay, 3, 4...Link, 8...
...Head rest frame, 9...Shaft, 50
...Rotation adjustment mechanism.

Claims (1)

[Scope of claim for utility model registration] Stay 1 attached to the upper part of the seat backrest,
1', a pair of links 3, 4, one end of which is rotatably attached to the stays 1, 1', and a head rest rotatably attached to the other end of the links 3, 4. a headrest frame 8; a shaft 9 which is rotatably fixed to the headrest frame 8 and fixed to one end of either of the links 3, 4 and rotates together with the links 3, 4; Rotating and locking operations of the links 3 and 4 relative to the stays 1 and 1' are performed via this shaft 9, and the front and back positions of the headrest frame 8 attached to the links 3 and 4 are adjusted relative to the stays 1 and 1'. and a rotation adjustment mechanism 50 that changes and adjusts the distance between the pair of links 3 and 4.
The headrest frame 8 side and the stay 1,
A movable headrest device characterized in that a headrest frame 8 can be tilted by rotating a shaft 9 differently on the 1' side.