JPH0739607U - Headrest front-back position adjustment device - Google Patents

Abstract

(57) [Abstract] [Purpose] A headrest mounted integrally with a seat back so as to be rotatable in the front-rear direction is to generate a moderation when rotating in the front-rear direction and adjusting the front-rear position. [Structure] Brackets (1) and (1) are vertically fixed to a back frame (4) of a seat back, and the flat end (2) of a headrest frame (2) is fixed to the bracket (1).
0) are connected via a leaf spring (3), the leaf spring (3) is provided with a locking projection (30), and the bracket (1) is provided with a plurality of engagement depressions (10A) (10A) (10A). It is characterized by

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front / rear position adjusting device for a headrest provided in a vehicle seat (seat), and more particularly to a front / rear position adjusting device for a headrest integrally connected to an upper part of a seat back.

[0002]

[Prior art]

 Conventional headrests include those that are formed separately from the seat back and are supported by the seat back by stays, and those that are integrally provided on the top of the seat back. Also, in the case where the headrest is formed separately in the seat back and the front and rear position is adjusted with respect to the seat back, front and rear with respect to the stay supporting the lower part of the headrest frame in the headrest on the seat back side. There is one that is pivotally attached in a freely rotatable manner. (For example, the official bulletin No. 61-121158, etc.).

On the other hand, there is a headrest integrally formed with a seat back in which a headrest frame of a plate plate is attached to a back frame of the seat back so as to be rotatable in the front-rear direction by a leaf spring. This holds the headless frame at a predetermined position with respect to the back frame by the frictional force of the leaf spring.

[0004]

[Problems to be solved by the device]

 The headrest, which is separate from the seatback and is attached to the stay supported on the seatback side so as to be rotatable in the front-rear direction, has a front-rear position adjusting device provided inside the headrest. However, there was a bad problem that the headrest was easily assembled.

On the other hand, the one in which the headrest is provided integrally with the seat back has a good assembling property because the headrest can be formed at the same time when the seatback is assembled, but as described above, the headrest frame is formed by the frictional force of the leaf spring. Since it is connected to the back frame, there was a problem that there was no sense of moderation when adjusting the position in the front and rear directions.

Therefore, an object of the present invention is to provide a feeling of moderation when the headrest integrated with the seat back is rotated forward and backward to adjust the forward and backward positions.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, a headrest front-rear position adjusting device according to the present invention comprises a bracket which is vertically fixed to the upper left and right of a back frame of a seat back, and a pipe which is bent in an inverted U shape. And a flat spring having both ends crushed into a flat shape, and a leaf spring attached to one or both ends of the headrest frame and having a locking projection on the end. A plurality of engaging recesses are provided in the front-rear direction at the positions where the projections engage, and both ends of the headrest frame are pivotally attached to the one or both brackets via the leaf springs so as to be rotatable in the front-rear direction. It is characterized by what is done.

[0008]

[Action]

 By pushing the headrest in the front-rear direction, the headrest is pivoted in the front-rear direction about the shaft attachment part for the bracket integrated with the seat back frame in the headrest frame, and the front-rear position with respect to the seated person's head is adjusted. . Then, when the headrest is pushed in the front-rear direction, the locking convex portion of the leaf spring engages with the engaging concave portion of the bracket, so that there is a feeling of moderation.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a headrest (H) and a seat back (SB) equipped with a front-back position adjusting device according to the present invention, which are provided on the left and right sides of an upper portion (40) of a back frame (4) of a seat back (SB). The bracket (1) is welded upward, and the headrest frame (2) of the headrest (H) is rotated in the front-rear direction to the bracket (1) via the leaf spring (3). It is freely pivoted.

The back frame (4) and the headrest frame (2) described above are both formed by bending a pipe, and the headrest frame (2) is bent in an inverted U shape and both ends (20) thereof are bent. ) Is flattened and is rotatably attached to the bracket (1) by rivets (5).

The foam cushion body (41) forming the seat back (SB) and the foam cushion body (61) forming the headrest (H) are integrally molded and formed into a seat. The front skin of the back (SB) skin (42) and the headrest (H) skin (62) are integrally attached to the trim wire (44) provided on the upper part (40) of the back frame (4). There is.

Therefore, the headrest (H) rotates in the direction of the arrow as shown in FIG. 2 around the shaft-attached portion of the headrest frame (2), and this rotation causes the front-rear position of the headrest (H) to move back and forth. Adjusted.

3 and 4 show a state in which the headrest frame (3) is attached to the back frame (1), and a supporting rod (21) is welded laterally to the lower portion of the headrest frame (3) to support the backrest (1). Brackets (1) are vertically welded to the left and right of the upper portion (40) of the frame (4). A leaf spring (3) is interposed between both ends (20) (20) of the headrest frame (3) and the bracket (1), and the leaf spring (3) is attached to the headrest frame (3). ) And the both ends (20) of () are rotatably attached to the bracket (1) by rivets (5).

By inserting the locking claws (3B) provided on the leaf spring (3) into the slits (20B) provided on the end portion (20), the leaf spring (3) is The headrest (H) is locked at the 20) side integrally, and the locking projection (30) provided at the lower end is engaged with the engaging recess (10A) provided at the bracket (1) so that the headrest (H) is moved forward and backward. keeping.

FIG. 5 shows the leaf spring (3), the bracket (1) and the end portion (20) in an exploded manner, and the leaf spring (31) has a long hole (31) through which the rivet (5) is inserted. , Locking claws (3B) (3C) (3C) that are bent at right angles in the direction of the end (20) from the edges of the upper part and the left and right, and locking protrusions that project in the lower direction toward the bracket (1). And a portion (30) are provided and are formed in a curved shape in the vertical direction as shown in FIG.

The bracket (1) has an insertion hole (11) through which the rivet (5) is inserted, and the locking projection (30) is engaged in an arc around the insertion hole (11) as a rotation center. A plurality of engaging recesses (10A) formed of a plurality of substantially oval through holes (three in the figure) are provided in the front-rear direction at the matching positions. The flanges (12) and (13) are provided on the front and rear edges of the bracket (1) to reinforce the bracket (1), and the upper edges (12A) (13A) of the flanges (12) and (13). ) Is used as a stopper for restricting the rotation range of the headrest frame (2).

The end portion (20) is formed with slits (20B) (20C) (20C) into which the locking claws (3B) (3C) (3C) of the leaf spring (3) are inserted and locked. Has been done. In the figure, (20A) shows a through hole for inserting the rivet (5).

In the embodiment shown in FIG. 6, the locking recesses (10B) (10B) provided in the bracket (1) are formed by pressing the bracket (1) into a concave shape. Is the same as that shown in FIG.

Thus, as shown in FIG. 4, since the leaf spring (3) is attached to the bracket (1) together with the end portion (20) of the headrest frame (2) with the rivet (5), the leaf spring (3) is attached. The vicinity (32) of the elongated hole (31) in the spring (3) elastically contacts the bracket (1), and the locking projection (30) engages in the engagement recesses (10A) (10B). The headrest (H) retains a predetermined position without rotating in the front-rear direction even if a load below a certain value in the front-rear direction is applied.

Then, the headrest (H) is moved against the elastic contact force of the leaf spring (3) with respect to the bracket (1) and the engaging force of the locking projection (30) with the engagement recesses (10A) (10B). When the headrest (H) is pushed in the front-rear direction, the upper part of the headrest (H) rotates in the front-rear direction around the rivet (5) which is a shaft attachment portion, and the headrest frame (2) and the leaf spring (3) are also integrated. Since it rotates in the same direction, the locking projection (30) of the leaf spring (3) escapes from the inside of the engagement recesses (10A) (10B). As a result, the locking projection (30) is further imparted with elasticity in the bracket (1) direction. Therefore, the locking protrusion (30) of the leaf spring (3) engages with another adjacent engaging recess (10A) (10B) of the bracket (1). At that time, since the locking convex portion (30) is given elasticity, a feeling of moderation is generated and the front and rear position of the headrest (H) is adjusted.

When adjusting the front-rear position of the headrest (H), the leaf spring (3) is provided with the elongated hole (31), so that the locking protrusion (30) of the leaf spring (3) is not provided. The leaf spring (3) becomes easy to move when engaging with the plurality of engaging recesses (10A) (10B).

Further, as described above, since the locking claws (3B) (3C) (3C) of the leaf spring (3) are formed long in the rotation direction of the headrest frame (2), the locking is performed. The nails (3B) (3C) (3C) have high strength and can prevent their deformation. Then, by providing the locking claws (3B) (3C) (3C) on the upper and lower sides, the occurrence of backlash can be prevented.

FIGS. 7 and 8 show another embodiment of the present invention. In this embodiment, locking projections (30A) (30B) are provided on the top and bottom of the leaf spring (3), and the bracket (1 ) Is provided with engaging concave portions (10C) (10D) (10D) with which the engaging convex portions (30A) (30B) of the leaf spring (3) are engaged. Therefore, as shown in FIG. When the locking convex portion (30A) engages with the engaging concave portion (10C), and when the headrest frame (2) is rotated forward from this state, one of the engaging concave portions (10D), When pivoted rearward, the engaging protrusions (30B) of the leaf spring (3) are engaged with the other engaging recesses (10D), respectively.

Further, stoppers (12A ′) (13A ′) are provided at the front and rear of the bracket (1) toward the headrest frame (2) so that the rotation range of the headrest frame (3) is constant. It is regulated within the range. 7 and 8, the same reference numerals as those used in the above-mentioned embodiment denote the same members, and the description thereof will be omitted. The locking claws (3C) (3C) may be added to the other edge of the leaf spring (3).

Therefore, by providing the locking projections (30A) (30B) on the upper and lower portions of the leaf spring (3), the engagement recesses (10C) (10C) (10C) (10C) formed by the through holes provided on the bracket (1) side are provided. D) (10D) is widened. Therefore, the press-moldability of the engaging concave portions (10C) (10D) (10D) provided in the bracket (1) is good, the strength of the bracket is not impaired, and the engaging convex portions (30A) (30B) are not in contact with each other. It is also possible to prevent abrasion due to.

[0026]

[Effect of device]

 According to the present invention, in a headrest integrated with a seat back having a good headrest assembly property, when the headrest is pivoted in the front-rear direction to adjust the front-rear position of the headrest, the locking projections of the leaf springs are attached to the bracket. Since it engages with one of the engaging recesses provided on the side, a feeling of moderation is generated, and it is possible to confirm the front-rear position adjustment of the headrest. Moreover, since the structure is simple, it is hard to break down and can be provided at a low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a seat with a headrest equipped with the device of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a front view of the device of the present invention.

FIG. 4 is a partial cross-sectional view of a main part.

FIG. 5 is an exploded perspective view of a main part.

FIG. 6 is an exploded perspective view of what is shown in FIG. 5 with a different engagement recess.

FIG. 7 is an exploded perspective view of another embodiment.

FIG. 8 is a partial sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bracket 2 Headrest frame 3 Leaf spring 4 Back frame 10A Engagement recess 10B Engagement recess 10C Engagement recess 10D Engagement recess 30 Locking projection 30A Locking projection 30B Locking projection

Claims (3)

[Scope of utility model registration request] 1. A bracket which is vertically fixed to the upper and left sides of a back frame of a seat back, a headrest frame which is formed by bending a pipe in an inverted U shape and crushing both ends into a flat shape. A leaf spring attached to one end side or both end sides of the plate spring and having locking projections at the ends thereof. A front-rear position adjusting device for a headrest, wherein both ends of a headrest frame are pivotally attached to the one or both brackets via the leaf springs so as to be rotatable in the front-rear direction. 2. The leaf spring is provided with a locking claw projecting toward the end of the headrest frame, and the locking claw is inserted into a slit provided at the end of the headrest frame. The front and rear position adjusting device for the headrest described. 3. The front-rear position adjusting device for a headrest according to claim 1, wherein the engaging recess is a slit or a recess.