JPS63171506A - Headrest devices for vehicle seats, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a headrest device for a vehicle seat, etc., and in particular to a headrest device that allows the headrest body to be directly rotated to easily adjust the rotational angle relative to the seatback, that is, the distance from the seated person's head. This is what I did.

Conventionally, this type of headrest device has a gear mechanism that is always in mesh between the headrest body and the rotation support part, and this gear mechanism is rotated by a knob attached to the headrest body to rotate the headrest body. There are known devices in which the angle can be adjusted, and devices in which a rotating mechanism having a frictional effect is arranged on the rotation support portion of the headrest body so that the headrest body can be directly rotated.

However, in the former type of headrest device, the rotating support part of the headrest body is in constant meshing of gears, so it can sufficiently withstand the load on the head in the event of a collision. However, in the latter type of headrest device, the rotating support part of the headrest body is locked due to friction, and the rotation angle can be adjusted by directly pressing the headrest body. However, if a large load is applied due to the impact of the head during a collision, the head will rotate unnecessarily and the head cannot be supported reliably. If the number increases, there is a problem that the rotation angle cannot be adjusted smoothly.

The present invention provides a headrest device that eliminates the above-mentioned drawbacks.The purpose of the present invention is to allow the headrest body to smoothly adjust the forward rotation angle and remain immovable against rearward force during impact. It is held in this state, and when it is rotated forward by a predetermined angle, the rearward engagement is released.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the entire vehicle seat equipped with the headrest device of the present invention, and shows the seat back (2) of the seat (1).
) is provided with a headrest device (3) on the upper surface of the seat to restrict the relative backward movement of the head of the seated person. The headrest body (4), which is formed by covering with the skin, is then attached to the seat back (2).
), the headrest body (4) is rotatably adjustable in the front and rear directions with respect to the stay (5).

Figure 2 is a front view of the headrest device obtained by cutting out the panel (11) of the headrest body (4).A window hole (lla) is formed on the bottom of the panel (11) of the headrest body, and brackets (12) are formed on both sides of the window hole (lla). > (13) are erected facing each other.On the other hand, a horizontal tubular shaft support (14) is fixed to the tip of the stay (5), and the tip of the stay (5) is attached to a panel. (11) Window hole (lla) inside
(12) and (13) via a shaft (15) via a tubular shaft support (14). The engagement mechanism (16) and the engagement release mechanism (1
7), the panel (11) can be rotated in steps forward with respect to the stay (5), that is, toward the seated person's side, and when rotated by a predetermined angle, the engagement is released and the panel (11) can be rotated backward, and the rotation angle can be adjusted. It is designed so that it can be done.

The shaft attachment part of this panel (11) and the stay (5), the engagement mechanism (16), and the engagement release mechanism (17) are shown in the exploded perspective view in Figure 3 and the explanatory diagrams of each part in Figures 4 to 6. Detailed information.

Bracket) (12) (13) has a shaft hole (12a) that communicates with the shaft hole of the tubular shaft support (14) of the stay (5).
(13a) is provided, and an oak (18) is welded to the outer surface of the shaft hole (12a) of one bracket (12), and the other bracket (13) is It is higher and has a through hole (
(19)
is welded to the shaft hole (13a), and the shaft hole (13a) is welded to the lower side of the shaft hole (13a).
13a) An arcuate long hole (13c) is formed with the center at the center.

The stay (5) is located below the tubular shaft support (14),
Bracket) A bracket (20) having a screw hole (20a) is fixed opposite to the elongated hole (13c) of (13).

The meshing mechanism (16) consists of both fixed side plates (21) and the movable tooth plate (
22), and the drawing board (21) has a saw-tooth tooth shape (22) with the front part approximately perpendicular and the rear part sloping on the half-periphery of the road.
1a), with a shaft hole (21b) in the center and a through hole (21C) corresponding to the elongated hole (13c) of the bracket (13) in the lower part. This drawing board (
21) is the bracket) (13), and insert the bracket (12) (13) into this shaft hole (21tl).
The shaft (15) to be screwed into the outer surface of the bracket (12) (18) is inserted through the shaft hole (12a) (13a) of the stay (5) and the tubular shaft support (14) of the stay (5). Then, insert the stepped pole (23) into the through hole (21C), pass it through the elongated hole (13C) of the bracket (13), and insert the screw hole (20a) of the bracket (20) of the stay [5).
) is fixed to the stay (5).

On the other hand, the tooth plate (22) has the tooth shape (21) of the drawing board (21) on the lower edge.
A shape that engages rearward with respect to a), that is, the front part is inclined;
The rear part has a substantially vertical sawtooth tooth profile (22a), and the front part has a shaft hole (22b), and a stepped pole (24) is inserted into this shaft hole (22b). It is supported by the spring (25) through the through hole (13b) of the bracket (13) and screwed into the bracket (19), and is always downwardly engaged with the drawing board (21). Rotationally biased.

A disengagement mechanism (17) is disposed between the drawing board (21) and the tooth plate (22) configured in this manner. That is, the drawing board (21
) are provided with pins (35a) (35b) protruding from the front and rear sides of the outer surface thereof, and a first lever (41a) and a second lever (41b) are provided on the outer surface of this panel (21). A refracting lever (41) is arranged, which is rotatably connected to the shaft by a shaft pin (42), and the first lever (41a) has a shaft hole (43) formed at its base end and is connected to the shaft (15). The second lever (41b) is rotatably supported by the shaft, and the second lever (41b) has a shaft on both sides near the joint with the first lever (41a).
Locking pieces (44) and (45) are protruded from opposite side edges of the first lever (41a), and a U-shaped groove (46) that opens upward is formed at the tip. Board (22)
The pin (47) protruding from the rear end is inserted from below.

The locking pieces (44) (45) of this bending lever (41) are connected to the first and second levers (41a) and (41tl).
The distance from the shaft attachment part to the lower edge, that is, the locking piece on the front edge side (
44) and the distance L between the locking piece (45) on the rear edge side
' has a relationship of L<L', and both levers (41a)
The refraction angle between (41b) and (41b) is set to be large on the front side and small on the rear side.
41b>, a protrusion (48) is provided protruding from the outer surface side, and a spring (49) is stretched between the protrusion (48) and the shaft (15).

In this example configured in this way, when the headrest main body (4) is locked backwards with respect to the stay (5), that is, when the tooth plate (22) is engaged with the drawing plate (21), In this case, the refracting lever (41) is bent rearward, and the U-shaped groove (46) at the tip of the second lever (41b) is loosely inserted into the pin (47) of the tooth plate (22). The bent state of (41) is maintained by the biasing force of the spring (49) against the second lever (41b) (FIG. 5A).

When the headrest main body (4) is pressed forward in this state, the panel (11) is rotated while the tooth profile (22a) of the tooth plate (22) successively overcomes the tooth profile (21a) of the drawing board (21), and as a result of this rotation, The refracting lever (41) is rotated forward when the U-shaped groove (46) is engaged with the pin (47) of the tooth plate (22).

In this way, when the panel (11) is rotated forward and the tooth plate (22) is rotated to the frontmost position relative to the drawing board (21), the first lever (41a) of the refracting lever (41) is moved forward. A pin (35a) whose edge protrudes from the front of the drawing board (21)
The second lever (41b)
In order to continue the rotation, the first lever (41a)
It crosses the dead center and is pulled forward by the action of the spring (49) and bent forward. The angle between the second lever (41b) and the first lever (41a) due to the bending is larger than when the second lever (41b) is bent backward, and the angle is close to a straight line. Therefore, the position of the U-shaped groove (46) will move outward with respect to the drawing plate (21), and the tooth plate (22) will be moved outward from the pin (47).
is pushed outward through the drawing board (21) and rotated in a direction away from the drawing board (21) (FIG. 5B).

That is, the relationship between the tooth plate (22) and the first and second levers (41a) and (41b) of the refracting lever (41) is as shown in FIG.
) There is a difference H in the height of the U-shaped groove (46) at the tip between a when it is bent backwards and a when it is bent forward, and the tooth plate (24) rotates by this height H. will be done. Therefore, the tooth plate (24) is disengaged from the drawing board (21).

In this state, the panel (11) is rotated backwards with respect to the stay (5) by the biasing force of the spring (33), and the refracting lever (41) is also integrally moved with the tooth plate (22) relative to the drawing board (21). When the first lever (41a) is rotated backward by the required angle, the first lever (41a) comes into contact with a pin (3513) protruding from the rear of both boards (21) and is locked.
The lever (41b) is bent backward beyond the dead center. By bending the second lever (41b) rearward, the U-shaped groove (46) is lowered, so that the tooth plate (22) is rotated downward by the biasing force of the spring (25), and the two plates are rotated again. (21), and the panel (
11) is locked backwards with respect to the stay (5) (
Figure 5C).

In this way, the headrest body (4) is attached to the stay [5].
The inclination angle is adjusted by pressing forward against.

In this embodiment, the stay (5) is shown as having a plate shape, but it is not limited thereto, and a rod shape may also be used. Also, the meshing movement members may be arranged on both sides of the pivot support of the panel (11). If provided, the headrest (4) can be held and held in the rear direction more reliably.

As described above, according to the present invention, the headrest main body can be easily tilted forward by simply pressing it, the operability of adjusting the tilt is extremely good, the desired angle can be quickly set, and the headrest can be locked backward. The seat is held securely, and the head of the seated person can be almost completely prevented from moving backwards in the event of a vehicle collision, thereby improving safety. Moreover, there are no protruding parts such as knobs exposed on the outer periphery of the headrest body, so there is no risk of harm to other occupants, and the cushion and skin can be easily attached to the panel during manufacturing. The assembly processing process can be simplified, and its practical effects are great.

[Brief explanation of the drawing]

FIG. 1 is a side view of a vehicle seat having a headrest device according to the present invention, FIG. 2 is a partially cutaway front view of an example of the headrest device according to the present invention, and FIG. 3 is an exploded perspective view of the main parts thereof. Figure 4 is a perspective view of the refracting lever, Figure 5A,
B and C are external side views showing the operating states of the fixed plate portions and the movable tooth plate portion, and FIG. 6 is an explanatory diagram of the operation of the bending lever. In the figure, (1) is the seat, (2) is the seat back, (3) is the headrest device, (4) is the headrest body, (5) is the stay, (11) is the panel, (12) and (13) are the brackets. (15) is the shaft, (16) is the meshing mechanism, (17)
(21) is a fixed side plate, (22) is a movable side tooth plate, (35a) and (35b) are pins, and (41) is a bending lever. Agent Paige Ito
Hidemori Matsukuma Figure 2 Figure 3

Claims (1)

[Scope of Claims] A headrest device for a vehicle seat or the like in which a headrest main body is rotated in the front-rear direction relative to a stay supported by a seat back, and a rotational angle position relative to the seat back can be adjusted, comprising: the stay and the seat back; An engaging mechanism is arranged between the headrest main body and the headrest main body to enable the headrest main body to engage and rotate forward and to lock the backward rotation, and when the headrest main body is rotated forward by a predetermined angle, the engagement mechanism engages with the engaging mechanism. The meshing mechanism includes a meshing release mechanism that releases the meshing mechanism, and the meshing mechanism is a gear plate (21) fixed to the stay (5) side.
and the gear plate (2) provided on the headrest body (11) side.
1), and a movable tooth plate (22) that is biased in the direction of a tooth profile (21a) provided on the outer periphery of the tooth plate (21) and meshes with the tooth plate (21). The pins (35a) (35b) protruding from the parts and the movable tooth plate (22)
The pin (47) is biased in the side direction of the gear plate (21).
The movable tooth plate (21) is located on the outer surface of the tooth plate (21) and is rotatably disposed so that the tip thereof is engaged with the pin (47).
2) has a refraction lever (41) that separates the movable tooth plate (22) from the tooth plate (21) during forward movement;
The refracting lever (41) is formed by rotatably connecting a first lever (41a) and a second lever (41b), and the second lever (41b) is attached to both side edges of the first lever (41a). Locking pieces (44) and (45) are protrudingly provided opposite to the edge, and the shaft support of the first lever (41a) and the second lever (41b)
) is stretched between the springs (49) to maintain the bent state, and when the bending lever (41) rotates, the pins (3)
5a) and (35b), the bending directions of the first lever (41a) and the second lever (41b) are reversed, and the movable tooth plate (22) is moved against the tooth plate (21). A headrest device for a vehicle seat, etc., which moves toward and away from the vehicle.