JPS6226010A - Headrest apparatus - 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] [Field of Industrial Application] The present invention relates to a headrest device installed in a vehicle seat, etc., and in particular, a headrest main body is supported by stay members provided on both left and right sides of the upper part of a seat back. Regarding the so-called gate-shaped headrest device, it is possible to adjust the vertical and longitudinal movement by directly operating the headrest body.
, is something.

[Conventional technology]

Some headrest devices for vehicle seats have a so-called gate shape in which the headrest body is supported from both sides by left and right stay members that are thrown over the top of the seat back. In 1982-1,360, left and right stays are erected via brackets on both the upper left and right sides of the upper seat frame, with both upper and lower ends fixed, and each stay has a headrest on the frame side. The fixed left and right supports are fitted to be slidable in the vertical direction, and a locking device is interposed between one of the stays and the support, which can be freely engaged and released at any position. An operating member of the locking device is provided between the upper surface of the seat back and the lower surface of the headrest, and the height of the headrest can be adjusted by releasing the locking device using the operating member. ing.

[Problem that the invention seeks to solve]

However, in the headrest device with this configuration, a locking device is interposed only between the left and right stays that support the headrest on both sides with respect to the seat back and the support, and the locking device is only interposed between the stay and the support on one side. Since the support is slidably locked on one side, the slidable side constantly slides downward due to the load of the headrest, causing the headrest to tilt laterally as a whole.
As a result, there is a problem that the vertical movement is not smooth, and since the operating member for operating the locking device is placed below the headrest, when the headrest is in the lower position, the distance between the upper part of the seatback and the lower surface of the headrest is small. It is narrow and difficult to operate, and in the upper position of the headrest, the operating member is exposed to the outside, resulting in a loss of appearance.The present invention was made in consideration of these points, and the headrest does not move up and down. It is an object of the present invention to provide a headrest device in which the operating member of the locking device is smoothly operated, the operability thereof is improved, and the appearance of the operating member is improved.

[Means for solving problems]

In order to solve the above problems, the present invention provides a headrest device in which the headrest body is supported by stay members provided on both left and right sides of the upper part of the seat back, which penetrates the frame of the headrest body and rotates relative to the frame. a rotation locking mechanism provided between the tubular shaft and the headrest frame to adjust relative rotation, and an engaging portion ρ with a relationship a>b between width a and thickness b at both ends. A support shaft is formed and rotatably inserted into a tubular shaft with engaging portions at both ends protruding, and a support shaft is provided between the support shaft and the headrest frame and rotates beyond a predetermined range of the headrest frame. and a plurality of engagement steps provided at both side stay members and engaged with both end engagement portions of the support shaft in the width direction at required intervals in the vertical direction, and the engagement steps The engagement support member is connected to the engagement support member by a slot slightly wider than the thickness of the engagement portion at both ends of the support shaft.

[Effect]

According to the above configuration, by directly rotating the headrest body, the front and back position relative to the seat back can be adjusted using the rotation lock mechanism, and when the headrest body is pushed up, the engaging portions at both ends of the support shaft engage with the stay members. Since the provided support and engagement member slides into contact with the upper edge of the retention step, it is rotated so that the engaging portions at both ends correspond in the thickness direction to the engagement groove between the engagement steps, and the groove is rotated. It passes through the hole and engages with the next engagement step. By pushing up the headrest body in this manner, the support shaft can be sequentially moved upward into engagement with the support engagement member of the stay member, and the headrest body can be set at a high position.

In addition, when lowering the headrest body, by rotating the headrest body beyond the forward and backward adjustment range, the support shaft is rotated via the interlocking mechanism, and the engaging portions at both ends face the grooves of the support engagement member in the thickness direction. By pushing down the headrest main body in this state, the engaging portion of the support shaft passes through the engaging groove, and the headrest main body is moved downward, so that the height can be reduced.

In this way, by directly operating the headrest main body, its longitudinal position and height can be adjusted.

〔Example〕

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

In the figure, H indicates the entire headrest device provided on the top of the seat sb of the vehicle seat S, and the headrest body (17 is viewed from both sides with the stay members (2a),
(2b), it is configured to be supported via a support mechanism which will be described later. (3) is the frame of the headrest body (1), that is, the headrest frame, and the side panels (
5a)' and (5b) are fixed to each other, and the peripheral surface thereof is surrounded by a cushioning material (6) and covered with an outer skin (7) to form a headrest main body (1).

Both side plates (5a) of the headrest frame (3),
Opposing shaft holes (8a) and (8b) are bored in (5b), and bushings (9a) and (9b) with seven flange are fitted into the bushings (9a) and (9b). A tubular shaft <11 is penetratingly supported on both side plates (5a) and (5b), and a ratchet type rotation mechanism is provided between the protrusion (10 m) at one end of the tubular shaft αQ and one side plate (5a). A locking mechanism qυ is provided. This rotation lock mechanism α
υ is a toothed plate α fixed to the protruding portion (10a) at one end of the tubular shaft αQ, and a claw piece α( The tooth portion of the tooth plate α2 is composed of a plurality of forwardly inclined additional teeth αa and a corresponding protrusion α4 at a required distance from the front end of the additional teeth αa. The claw piece αJ is approximately U-shaped and has one end (13a) engaged with the tooth groove of the additional tooth at the forefront end of the tooth plate α2, and the other end (13b) approximately corresponds to the protrusion α$. The bottle αD and the side plate (5a) are pivotally connected to the side plate (5a) by a bottle (16) at the bent part on the other end (13b) side, and are planted on the one end (13a) side.
A toggle spring α9 is stretched between the protruding piece α and the protruding piece α, passing through the vicinity of the above-mentioned pivot joint, and is always held at one end (13
a) is rotationally biased to 5 so that it meshes with the tooth groove of the tooth plate (1).

Also, the protrusions (Ion) at both ends of the tubular shaft αQ, (10b
) has a quadrilateral slider (20a), (2
0b) is fixed, a longer support shaft (21) is rotatably inserted into this tubular shaft (10), and both ends have a cross section with a relationship between width and thickness b. Semicircular engaging portions (21a), C21, b) are formed. Further, a bottle (A) is provided in the middle of the support shaft (21) and protrudes from a long hole (2) formed in the tubular shaft αQ to be elongated in the circumferential direction.

On the other hand, a bracket (2) is protruded from the tubular shaft (IQ+) at a required distance from the elongated hole @, and this bracket c!
A torsion coil spring OQ is wound around the tubular shaft αQ between the holder and the bottle C, and one end is engaged with the bottle (the second end is engaged with the bracket C241 and the other end is rotationally biased in one direction with respect to the support shaft CD). That is, both end engaging portions (21a) and (21b
) are rotated so that the arcuate surfaces (21a1) and (21bx) of the bracket (21bx) are positioned downward.
) and one side plate (5a), there is a return spring G! 6) is stretched.

Further, on the inner surface of the other side plate (5b), two hooks, which are interlocking mechanisms, are protrudingly provided at a required distance from each other on the front side.

In addition, on the inner side of the stay members (2a) and (2b) fixed to the upper left and right sides of the seat back sb of the vehicle seat S, there are projecting portions (10a) at both ends of the above-mentioned tubular shaft α■,
A slider (20a) fixed to the terminal of (10b),
(20b) is an engagement support member that is slidably engaged in the vertical direction;
(30b) is fixed, and this outer slider (30a)
, (30b) have engaging portions (21a) and (21b) at both ends of the above-mentioned support shaft 0υ in the vertical direction of the central part, and have a thickness b.
Communication grooves (31a) and (3
1b) are formed and these communication grooves (31a), (3xb)
A plurality of cutout-shaped engagement step portions (32a) with which the engagement portions (21a) and (21b) are engaged in the width a direction on the − side edge of the
, [: (32ax), (32a2), (32a3)
) , (32b) , ((32bt) , (32bz
), (32b3)) are formed at required intervals, and the engaging step portions (32a), (32b) are formed in a sawtooth shape with the upper end inclined inward. Also, the communication groove (31a)
, the lower part of (31b) is the support shaft engaging part (21a),
(21b) is formed to have a width that allows it to pass through in the width a direction, and the lower sides of the lowest engagement step portions (31a) and (31b) are inclined inward.

Sliders (20a) and (20a) fixed to the tubular shaft 4 on the belly button rest main body (1) are attached from below to the outer sliders (30a) and (30b) fixed to the stay members (2a) and (2b). Insert the support shaft (
The engaging portions (21a) and (21b) of 21) are connected to the outer slider (30a), the communication groove (31a) of (30b),
(31b) from the lower opening side to the threaded engagement stepped portion (32a),
(32b).

In this state, stay members (2a) and (2b)
The headrest body (1) is attached to the upper part of the seatback sb by fixing it to both sides of the upper part of the no'tsuk sb, and the stay members (2a) and (2b) are covered with the roll bars (33a) and (33b). As a result, a vehicle seat S shown in FIG. 7 is obtained. The operation of the headrest device [1H] configured as above will be explained.

The headrest body (1) has stay members (2a), (2
b) Outer slider (30a), (30
The both end engaging portions (21a) and (21b) of the support shaft (21) are engaged with one of the engaging stepped portions (32a) and (32b) in b) in the direction of its width a and held at a desired height. In this state, when the rotation locking mechanism 0υ is located at the rearmost position with respect to the seat back sb, one end (13a) of the claw piece α is attached to the additional tooth a (the first tooth) of the tooth plate α, as shown in FIG. ), the headrest frame (3), ie, the headrest body (1), is held in that position against the pressing force from the front.

In this state, if the headrest main body (1) is rotated so as to suppress or pull it forward, the headrest frame (
3) is rotated forward about the tubular shaft supported by the stay members (2a) and (2b), and therefore the claw piece Q3, which is pivotally attached to the side plate (5a), moves upward and forward. Therefore, one end of the claw piece (13
a) is sequentially engaged with the tooth groove of the additional tooth I in front of the tooth root (12), and due to this engagement, the headrest frame (3) is held in a state of sequential rotation forward, and the headrest main body (1) is The headrest body (1) is moved to the front position with respect to the seat back sb.In this way, the headrest main body (1) is displaced from the rear to the front, and the distance between it and the head of the seated person can be adjusted as desired. Even if an impact is applied from the front side, this can be reliably stopped by the engagement of the tooth plate α2 and the claw piece (13).

In addition, when the headrest main body (1) is lifted in this state, the support shaft (2I) engages with its both ends engaging portions (21a),
The horizontal planes (21az) and (21bz) of (21b) are the stay member (2a) and the 7-outer slider (3) on the (2b) side.
0a) and (30b), the engagement steps (32a) and (32
By contacting the inclined upper edges (32ax) and (32bt) of b), the engaging portions (21a) and (21b) are rotated against the biasing force of the torsion coil springs.
are the communicating grooves (31a), (3
1b), therefore, this communication groove (31
a), (31b), and the next stage of engagement step (32a).
), (32b), the support shaft Cυ is rotated by the elasticity of the torsion coil spring (c) and engages the engaging part (21
a), (21b) are the engagement step portions (32a), (3
2b). By lifting the headrest body (1) in this manner, it can be moved upward in sequence and the headrest body (1) can be set at a high position.

In addition, in order to lower the headrest body (1) which has been set at a high position in this way, the headrest frame (3) must be moved 1LiI by pressing the headrest body (1) further forward from the forwardmost position of the wo rounding clause range. When the rotation is made beyond the adjustment range, the hook (5) protruding from the other side plate (5b) comes into contact with the bottle (2) protruding from the support shaft (2υ), and thus the bottle +22 is pressed. The support shaft 1a is rotated with respect to the tubular shaft αtic, and the engaging portions (21a) and (21b) at both ends engage the communication grooves (31a) and (31b) of the outer sliders (30a) and (30b) in the thickness b direction thereof. ), and therefore the support shaft (21) is opposed to the actus slider (30a), (30b)
The lock is released from the communication groove (31a), (3
1b).

Therefore, the headrest body (11 is the stay member (2a),
(2b), and when you release your hand from the headrest main body (IJ) at the desired height, the headrest frame (3) is rotated back by the return spring (26), that is, returned to the rearmost position, and thus The pressure on the bottle ■ of the support shaft Cυ due to the pressure is released and the support shaft Q1)
are rotated back by the biasing force of the torsion coil spring (c), and the engaging portions (21a) and (21b) at both ends of the actuator slider (30a) in the width a direction.
The headrest body (1) is engaged with the engagement steps (32a) and (32b) of (30b) and the stay member (2a)
, (2b) is locked in a lower position.

In this way, the height of the headrest body (1) can be set arbitrarily.

〔Effect of the invention〕

As described above, according to the present invention, by rotating the headrest main body, the front and rear positions relative to the seat back can be changed, and by lifting the headrest main body, the height can be set to a high position, and the headrest main body can be set to a high position. By rotating the stay member forward, that is, by rotating it to the full stroke, the lock on the stay member is released and the stay member can be moved downward, and its height can be set to a low position. Compared to those placed below the headrest body, the operability is significantly improved, and the seated person can move the headrest body forward, backward, and up and down by 4'WJ without turning around while seated. In particular, in the present invention, when adjusting the headrest to a high position, it is sufficient to simply push it up, making it possible to operate it with one hand while sitting. Furthermore, since the locking mechanism is built into the headrest body and there is no need to provide operating members such as levers and knobs on the outside, the appearance is not impaired and safety is further improved.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the headrest device according to the present invention, with the panel omitted; Fig. 2 is a sectional view taken along the line I-I of Fig. 1 with the panel attached;
4 is a cross-sectional plan view of the headrest main body and the stay member in an engaged state, FIG. 5 is a vertical sectional front view of a portion of the same, and FIG. FIG. 7 is a perspective view of an example of a vehicle seat equipped with a headrest device according to the present invention. In the figure, (1) is the spatula rest body, (2a), (zb
) is the stay member, (3) is the headrest frame, α(
2) is a tubular shaft, αυ is a rotation locking mechanism, I2υ is a support shaft, (21i) and (21b) are retaining parts, (5) is a hook as an interlocking mechanism, and (30a) and (30b) are engagement supports. Actus slider as a member, (31a), (31
t)) are communicating grooves, (32a), (32b)
is the engagement step.

Claims (1)

[Claims] A headrest device in which a headrest main body is supported by stay members provided on both left and right sides of the upper part of a seat back, wherein the headrest main body is penetrated through a frame of the headrest main body and rotated relative to the frame. A tubular shaft, a rotation locking mechanism provided between the tubular shaft and the headrest frame to adjust relative rotation, and engaging portions formed at both ends with a relationship between width a and thickness b such that a>b. a support shaft rotatably inserted into the tubular shaft with the engaging portions at both ends protruding; and a support shaft provided between the support shaft and the headrest frame to prevent rotation of the headrest frame beyond a predetermined range. an interlocking mechanism for rotating the support shaft, and a plurality of engagement step portions provided on the both side stay members and engaged with both end engagement portions of the support shaft in the width direction, formed at required intervals in the vertical direction. and an engagement support member in which the engagement step portions are connected by a slot slightly wider than the thickness of the engagement portions at both ends of the support shaft.