JP2009082312A - Stay support, headrest support structure, and seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a head rest to simply perform its positional adjustment and also to firmly fix its position. <P>SOLUTION: The support structure includes: a stay 51 extended from the headrest 4; a stay support 53 having an insertion hole 66 to which the stay 51 is inserted; and a bracket 55 to which the stay support 53 is fitted and which is provided at the top of a back rest 3. The line 66D of the front side wall surface of the insertion hole 66 in a vertical cross section is curved, and the radius of curvature of the line 66C of the rear side wall surface of the insertion hole 66 is larger than that of the front side wall surface of the insertion hole 66. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stay support, a headrest support structure, and a seat, and more particularly to a stay support that guides a stay provided on the headrest up and down, a headrest support structure that uses the stay support, and a seat that uses the support structure.

  Conventionally, a headrest is provided in a vehicle seat, and an occupant can support his / her head on the headrest. A straight stay extends from the lower end of the headrest. On the other hand, a cylindrical stay support is attached inside the upper end of the backrest, and the stay is inserted into the stay support from above. The position of the headrest can be adjusted by moving the stay up and down along the stay support, and the position of the headrest can be fixed by locking the stay to the headrest.

  As a means for locking the stay to the stay support, there is a mechanism in which a groove is formed in the stay, a lock piece is provided on the stay support, and the lock piece is engaged with the groove of the stay by a restoring force of a spring (for example, Patent Document) 1). If the occupant presses the lock piece against the restoring force of the spring, the lock piece comes off the groove and the stay can be moved up and down.

There is also a means for locking the stay without providing a groove in the stay. For example, as described in Patent Document 2, a pressing portion having an inner diameter slightly smaller than the outer diameter of the stay is provided on the stay support, and when the stay is inserted into the stay support, the pressing portion is expanded by the stay. The stay is supported by its reaction force.
International Publication No. 00/10430 Japanese Patent No. 3475320

In Patent Document 1, since the stay cannot be moved unless the lock piece is kept pressed, the position of the headrest cannot be easily adjusted. On the other hand, in Patent Document 2, since a reaction force always acts on the stay from the pressing portion, a large force is required to move the stay, and the position of the headrest cannot be easily adjusted.
Accordingly, an object of the present invention is to make it possible to easily adjust the position of the headrest and to firmly fix the position of the headrest.

In order to solve the above problems, according to the invention according to claim 1,
In a stay support having an insertion hole into which a stay extended from the headrest is inserted,
A line on the front side wall surface of the insertion hole in the longitudinal section is curved around the front side of the insertion hole, and a radius of curvature of the line on the rear side wall surface of the insertion hole in the longitudinal section is the line of the line on the front side wall surface of the insertion hole. A stay support characterized by being larger than the radius of curvature is provided.

According to the invention of claim 2,
The stay support according to claim 1, wherein a line of a rear side wall surface of the insertion hole in a longitudinal section is straight.

According to the invention of claim 3,
The stay support according to claim 2, wherein a part of a rear side wall surface of the insertion hole is a belt-like flat surface.

According to the invention of claim 4,
A stay extended from the headrest,
A stay support provided in the upper portion of the backrest, and having an insertion hole into which the stay is inserted;
A line on the front side wall surface of the insertion hole in the longitudinal section is curved around the front side of the insertion hole, and a radius of curvature of the line on the rear side wall surface of the insertion hole in the longitudinal section is the line of the line on the front side wall surface of the insertion hole. A headrest support structure is provided that is larger than the radius of curvature.

According to the invention of claim 5,
The headrest support structure according to claim 4, wherein a line of a rear side wall surface of the insertion hole in a longitudinal section is linear.

According to the invention of claim 6,
The headrest support structure according to claim 5, wherein a part of a rear side wall surface of the insertion hole is a belt-like flat surface.

According to the invention of claim 7,
The headrest support structure according to any one of claims 4 to 6, wherein the stay is curved around a front side of the stay.

According to the invention of claim 8,
The part of the stay is pressed against the rear side wall surface of the insertion hole, and the part of the stay is pressed against the front side wall surface of the insertion hole above and below the pressure contact part. A headrest support structure is provided.

According to the invention of claim 9,
Headrest,
A seat,
A backrest that stands up from the seat;
A stay extending from the headrest;
A stay support provided in the upper portion of the backrest, and having an insertion hole into which the stay is inserted;
A line on the front side wall surface of the insertion hole in the longitudinal section is curved around the front side of the insertion hole, and a radius of curvature of the line on the rear side wall surface of the insertion hole in the longitudinal section is the line of the line on the front side wall surface of the insertion hole. A sheet greater than the radius of curvature is provided.

  According to the present invention, the stay extended from the headrest is pressed against the front side wall surface and the rear side wall surface of the insertion hole, thereby fixing the stay. On the other hand, if the stay or the headrest is moved in accordance with the shape of the stay or the shape of the front side wall surface of the insertion hole by gripping the headrest, the position of the headrest can be easily adjusted without applying a large force.

  Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

FIG. 1 is a perspective view showing a schematic configuration of a vehicle seat 1.
As shown in FIG. 1, the vehicle seat 1 includes a seat portion 2, a backrest 3 connected to the rear end portion of the seat portion 2, and a headrest 4 provided on an upper portion of the backrest 3.

  The seat 2 is connected to the floor of the vehicle via the front / rear position adjustment mechanism and the height adjustment mechanism, the front / rear position of the seat 2 is adjusted by the position adjustment mechanism, and the height of the seat 2 is further adjusted. It is adjusted by the mechanism. In addition, a conventionally well-known thing can be used as such a position adjustment mechanism part and a height adjustment mechanism part.

  The seat part 2 covers the frame body with a cushion, and receives the occupant's buttocks on the lower side to support the buttocks.

  A backrest 3 is connected to the rear end of the seat 2 via a reclining mechanism. The reclining mechanism adjusts the angle of the backrest 3 with respect to the seat portion 2, and the backrest 3 falls back or rises forward by the reclining mechanism, and the reclining mechanism locks the backrest 3.

  The backrest 3 is obtained by covering a frame 31 (shown in FIGS. 2 and 3) with a cushion 32 (shown in FIG. 3), and receiving the back of the occupant behind it to support the back.

  The headrest 4 is obtained by covering a pad portion 41 (shown in FIG. 3) with an epidermis and receiving the occupant's rear head behind it to support the occupant's head. The vehicle seat 1 is provided with a support structure that supports the headrest 4 on the backrest 3.

The support structure of the headrest 4 will be described with reference to FIGS.
The support structure of the headrest 4 includes a pair of stays 51 and 52 extending downward from the headrest 4, a stay support 53 that receives the stay 51 and holds the stay 51, and a stay support that receives the stay 52 and holds the stay 52. 54, a bracket 55 that holds the stay support 53, and a bracket 56 that holds the stay support 54.

  The bracket 55 is fixed to the frame 31 on the upper side inside the backrest 3. The bracket 55 is a metal pipe having a rectangular tube shape, the bracket 55 is provided in the vertical direction, and one opening of the bracket 55 faces upward and the other opening faces downward. The bracket 56 is formed in the same manner as the bracket 55, and the bracket 56 is fixed to the frame 31 at a predetermined interval from the bracket 55.

  The stay support 53 is formed by molding a synthetic resin into a cylindrical shape. The stay support 53 includes a lower cylindrical portion 61, a head portion 62 formed at the upper end of the cylindrical portion 61, and elastic fins 63 to 65 that are provided on the side surfaces of the cylindrical portion 61. The cylindrical portion 61, the head portion 62, and the elastic fins 63 to 65 are integrally formed of synthetic resin.

  The cylindrical portion 61 is inserted into the bracket 55 from above, and the elastic fins 63 to 65 are pressed against the inner wall surface of the bracket 55. The outer diameter of the head portion 62 is larger than the outer diameter of the cylindrical portion 61, and the head portion 62 is hooked on the upper end of the bracket 55. On the other hand, a claw 67 is formed on the side wall of the cylindrical portion 61, a notch 57 is formed at the lower end of the bracket 55, and the claw 67 is hooked on the notch 57.

  In a state where the stay support 53 is inserted into the bracket 55, the cylindrical portion 61 is provided inside the backrest 3, and a part of the head 62 is exposed at the upper end surface of the backrest 3.

  4 is an end view of the upper surface of the stay support 53, FIG. 5 is an end view of the lower surface of the stay support 53, and FIG. 6 is an arrow in a longitudinal section along VI-VI shown in FIG. FIG.

  The stay support 53 is formed with an insertion hole 66 over its entire length. That is, the insertion hole 66 penetrates from the upper end surface of the head portion 62 to the lower end of the cylindrical portion 61. The upper end opening 66A of the insertion hole 66 has a substantially circular shape, the lower end opening 66B of the insertion hole 66 has an oblong shape that is long in the front-rear direction, and the diameter (major diameter) in the front-rear direction of the insertion hole 66 is upward. The diameter in the horizontal direction (short axis) is uniform from top to bottom.

  The line 66C on the rear side wall surface of the insertion hole 66 in the longitudinal section is not curved and is straight. A line 66C on the rear side wall surface of the insertion hole 66 is parallel to a center line 66E passing through the center of the upper end opening 66A of the insertion hole 66. On the other hand, the line 66D on the front side wall surface of the insertion hole 66 in the longitudinal section is curved like a bow, and the center of curvature O of the line 66D is in front of the insertion hole 66. The line 66C on the rear side wall surface of the insertion hole 66 may be curved like a bow, and the center of curvature may be in front of the insertion hole 66. In this case, the line 66C on the rear side wall surface of the insertion hole 66 may be The distance radius needs to be larger than the distance radius of the front wall surface line 66D. When the curvature radius of the line 66C on the rear side wall surface of the insertion hole 66 is infinite, the curvature radius of the line 66C is larger than the curvature radius of the line 66D on the front side wall surface of the insertion hole 66, as described above. The line 66C is straight.

  FIG. 7 is a bottom view showing the stay support 53. In FIG. 7, the center line 66E is not perpendicular to the paper surface but is slightly inclined with respect to the vertical direction of the paper surface so that the rear side wall surface of the insertion hole 66 is shown. As shown in FIG. 7, the rear side wall surface of the insertion hole 66 is not a cylindrical surface, but a part of the rear side wall surface of the insertion hole 66 is a flat surface 66G. The flat surface 66G has a strip shape from the upper end opening 66A to the lower end opening 66B of the insertion hole 66.

  The stay support 54 is provided in the same manner as the stay support 53, and the stay support 54 is inserted into the bracket 56 in the same manner as the stay support 53 is inserted into the bracket 55. Therefore, in FIG. 2, the same reference numerals are assigned to the components corresponding to each other between the stay support 53 and the stay support 54, and the same reference symbols are assigned to the components corresponding to each other between the bracket 55 and the bracket 56. Detailed descriptions of the stay support 54 and the bracket 56 are omitted.

  As shown in FIGS. 3 and 6, the stay 51 is inserted into the insertion hole 66 of the stay support 53. The stay 51 is curved in a bow shape along the line 66 </ b> D on the front side wall surface of the insertion hole 66, and the center of curvature of the stay 51 is in front of the stay 51. The stay 51 is formed by bending a straight circular pipe having a uniform diameter from top to bottom except for the lower end portion. The stay 51 has a pipe shape, but may have a column shape without a cavity.

  Since the stay 51 is curved and the insertion hole 66 is formed in the shape as described above, the stay 51 is supported at three points. That is, as shown in FIG. 6, the stay 51 is pressed against the front side wall surface of the insertion hole 66 at the upper part of the insertion hole 66 (a portion indicated by α), and the stay 51 is below the rear side wall surface of the insertion hole 66 below that. The stay 51 is in pressure contact with the front side wall surface of the insertion hole 66 (portion indicated by γ). The stay 52 is also inserted into the insertion hole 66 of the stay support 54. Similarly, since the stay 52 is curved, the stay 52 is supported at three points.

  As described above, since the stays 51 and 52 are supported at three points, the position of the headrest 4 is firmly fixed without the stays 51 and 52 rattling. In particular, when the back of the occupant leans against the headrest 4, the stays 51 and 52 are restrained, and the headrest 4 is fixed without rattling. Since the stays 51 and 52 do not rattle, noise due to vibration is also minimized.

  Further, when the vertical position of the headrest 4 is adjusted, the stays 51 and 52 can be easily moved in the pulling out direction or the inserting direction by pulling the headrest 4 up or pushing it down. In other words, the position of the headrest 4 can be adjusted with a weak force just by grabbing the headrest 4 and moving the headrest 4 along the curved shape of the stays 51 and 52. Once the position of the headrest 4 is determined, the headrest 4 is released. However, the position of the headrest 4 is firmly fixed. Thus, both operability and prevention of rattling can be achieved.

  Further, by simply finely adjusting the curved shape of the stays 51 and 52 or the flat surface 66G of the rear side wall surface of the insertion hole 66, the contact condition between the stays 51 and 52 and the rear side wall surface of the insertion hole 66 can be easily adjusted. Prevents rattling and operability to the optimum state.

The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.
For example, although the case where the seat according to the present invention is applied to a vehicle seat of an automobile has been described in the above embodiment, the seat may be applied to a seat of another vehicle (for example, an aircraft, a ship, etc.). Further, the seat according to the present invention may be used other than a vehicle.

It is the perspective view which showed the vehicle seat to which this invention is applied. It is the perspective view which decomposed | disassembled and showed the support apparatus of the headrest to which this invention is applied. It is the longitudinal cross-sectional view which showed the upper part of the backrest of the said vehicle seat, a headrest, and its support structure. It is the end view which showed the upper surface of the stay support attached to the backrest of the said vehicle seat. It is the end view which showed the lower surface of the said stay support. It is the longitudinal cross-section which showed the said stay support etc. It is the bottom view which showed the said stay support.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat part 3 Backrest 4 Headrest 51, 52 Stay 53, 54 Stay support 55, 56 Bracket 66 Insertion hole 66G Flat surface

Claims (9)

In the stay support having an insertion hole into which the stay extended from the headrest is inserted,
The line of the front side wall surface of the insertion hole in the longitudinal section is curved around the front side of the insertion hole, and the radius of curvature of the line of the rear side wall surface of the insertion hole in the longitudinal section is the line of the line of the front side wall surface of the insertion hole. Stay support characterized by a larger radius of curvature.   The stay support according to claim 1, wherein a line on a rear side wall surface of the insertion hole in a longitudinal section is linear.   The stay support according to claim 2, wherein a part of a rear side wall surface of the insertion hole is a belt-like flat surface. A stay extended from the headrest,
A stay support provided in the upper portion of the backrest, and having an insertion hole into which the stay is inserted;
The line of the front side wall surface of the insertion hole in the longitudinal section is curved around the front side of the insertion hole, and the radius of curvature of the line of the rear side wall surface of the insertion hole in the longitudinal section is the line of the line of the front side wall surface of the insertion hole. Headrest support structure that is larger than the radius of curvature.   The headrest support structure according to claim 4, wherein a line on a rear side wall surface of the insertion hole in a longitudinal section is linear.   The headrest support structure according to claim 5, wherein a part of a rear side wall surface of the insertion hole is a belt-like flat surface.   The headrest support structure according to any one of claims 4 to 6, wherein the stay is curved around a front side of the stay.   The part of the stay is pressed against the rear side wall surface of the insertion hole, and the part of the stay is pressed against the front side wall surface of the insertion hole above and below the pressure contact part. Headrest support structure. Headrest,
A seat,
A backrest that stands up from the seat;
A stay extending from the headrest;
A stay support provided in the upper portion of the backrest, and having an insertion hole into which the stay is inserted;
The line of the front side wall surface of the insertion hole in the longitudinal section is curved around the front side of the insertion hole, and the radius of curvature of the line of the rear side wall surface of the insertion hole in the longitudinal section is the line of the line of the front side wall surface of the insertion hole. A sheet that is larger than the radius of curvature.

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