JP6283184B2 - Headrest holder, headrest support structure, and vehicle seat - Google Patents

Description

  The present invention relates to a headrest holder, a headrest support structure, and a vehicle seat.

  A vehicle seat equipped with a headrest has a structure in which a headrest holder is fitted inside a headrest holder bracket of a headrest support member of a seatback, and a headrest stay is mounted on each headrest holder so as to be movable up and down (for example, Patent Document 1).

JP 2001-58531 A

  It is desired to suppress the damage of the collision body and to simplify the structure when the collision body collides with the seat back from behind.

  In consideration of the above facts, the present invention has a simple structure, a headrest holder capable of suppressing damage to a collision body when the collision body collides with the seat back from behind, a headrest support structure including the headrest holder, and a vehicle The problem is to obtain a sheet.

According to the first aspect of the present invention, a holder main body portion that is formed in a cylindrical shape and accommodates a headrest stay therein, and a flexure piece that is formed on one end side in the longitudinal direction of the holder main body portion and can be bent and deformed in two inner directions. And a curved surface that is formed on the outer surface of the distal end portion of the bending piece and is curved outwardly when viewed in a cross section orthogonal to the longitudinal direction of the holder main body portion, and the holder main body portion is a cylindrical holder support member When inserted through penetrating elastically restoring the lower end surface of the holder support member are located outside engaged with the lower end surface, the thickness suppress contact of φ165 ball to the edge of the lower end surface of the holder support member And a meat part.

In this headrest holder, a bending piece is formed on one end side in the longitudinal direction of the holder main body. And the thick part is formed in the front-end | tip part outer surface of a bending piece. When the holder main body portion is inserted through and penetrates the cylindrical holder support member, the thick wall portion is elastically restored and is positioned outside the lower end surface of the holder support member and locked to the lower end surface. Thus, the headrest holder is prevented from being detached from the holder support member by locking the thick portion to the lower end surface of the holder support member.

  The bending piece can be deformed in two directions inside the holder main body. By deforming the bending piece in a direction that combines these two directions, the thickness of the thick portion formed on the outer surface of the distal end portion of the bending piece can be increased compared to a structure in which the bending piece can be deformed only in one direction. . By thickening the thick portion in this way, the outer surface of the thick portion is positioned on the outer side in a state where it is locked to the lower end surface of the holder support member, so that the collision body can easily come into contact with the headrest holder. Contact of the collision body with the holder support member is suppressed, and damage to the collision body is also suppressed.

  By making the flexure piece deformable in two directions inside the holder main body, the thick portion can be made thick, and damage to the collision object can be suppressed with a simple structure.

The thick portion includes a curved surface that is curved outwardly when viewed in a cross section orthogonal to the longitudinal direction of the holder main body.

Since the thick portion has a curved surface that is convexly convex outward, and there is no sharp portion on the outer surface of the thick portion, damage to the collision object can be suppressed. Moreover, when the holder main body portion is inserted through the cylindrical holder support member and penetrates, the thick wall portion is elastically restored and is positioned outside the lower end surface of the holder support member. The thick portion suppresses the φ165 ball from coming into contact with the edge of the lower end surface of the holder support member.

According to a second aspect of the present invention, in the first aspect of the present invention, the thick portion is integrally formed with the flexible piece.

  By forming the thick part integrally with the flexure piece, the number of parts is reduced as compared with a separate structure.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the bending piece is formed by dividing the front end side in the insertion direction of the holder main body portion into the holder support member into at least three. Has been.

  The bending piece can be formed with a simple structure in which the front end side in the insertion direction of the holder body is divided into at least three.

The invention according to claim 4 is the invention according to any one of claims 1 to 3 , wherein a plurality of the flexure pieces are provided, the opposing surface of the flexure pieces and the thick portion of each flexure piece. A curved first radius portion is formed between the outer surface and the outer surface.

  Since the first rounded portion is formed between the opposing surfaces of the plurality of flexure pieces and the outer surface of the thick portion of each flexure piece, it is possible to suppress damage to the impacting body that contacts the vicinity of the opposition surfaces of the flexure pieces. .

The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein a second rounded portion that is curved is formed between a tip surface and a side surface of the thick portion. Yes.

  Since the second rounded portion is formed between the distal end surface and the side surface of the thick portion, it is possible to suppress damage to the colliding body that contacts the boundary portion between the distal end surface and the side surface.

According to a sixth aspect of the present invention, the headrest holder according to any one of the first to fifth aspects is attached to the seat back, the headrest holder is inserted, and the thick portion is engaged at the lower end surface. And a holder support member that prevents the headrest holder from coming off and prevents the φ165 ball from contacting the edge of the lower end surface, and a headrest stay that is inserted into the holder main body of the headrest holder from above. A headrest.
In a seventh aspect of the present invention, a holder main body portion that is formed in a cylindrical shape and accommodates a headrest stay therein, and a flexure piece that is formed on one end in the longitudinal direction of the holder main body portion and can be bent and deformed in two inner directions. And a thick-walled portion formed on the outer surface of the distal end portion of the bending piece and locked to the lower end surface of the holder support member by elastically restoring when the holder main body portion is inserted through and penetrates the cylindrical holder support member; A headrest holder having a 165 sphere ball contact with the edge of the lower end surface together with the headrest holder attached to the head back holder, the headrest holder being inserted and the thick portion being locked at the lower end surface to prevent the headrest holder from coming off And a headrest provided with a headrest stay inserted into the holder main body of the headrest holder from above.

  When the headrest holder is inserted into the holder support member attached in the seat back, the thick portion is locked to the lower end surface of the holder support member and is prevented from coming off. A headrest stay is inserted into the headrest holder from above, and the headrest is attached to the seat back. Since the outer surface of the thick portion is located on the outer side, the φ165 ball as a collision body can easily come into contact with the headrest holder, contact with the holder support member is suppressed, and damage to the collision body is also suppressed.

  The “φ165 sphere” is a sphere having a diameter of 165 mm.

In the invention according to claim 8, in the invention according to claim 6 or claim 7 , the thick portion is located on the back side of the seat back.

  Since the thick portion is located on the back side of the seat back, damage when the φ165 ball collides from the back side can be suppressed.

In invention of Claim 9 , the seat back frame member arrange | positioned in a seat back, The said holder support member was attached to the said seat back frame member, The any one of Claims 6-8. And a headrest support structure.

  The headrest is attached to the seat back by attaching the holder support member to the seat back skeleton member in the seat back. Since the outer surface of the thick portion is located on the outer side, the φ165 ball as a collision body can easily come into contact with the headrest holder, contact with the holder support member is suppressed, and damage to the collision body is also suppressed.

  Since the present invention has the above-described configuration, the collision body can be prevented from being damaged when the collision body collides with the seat back from behind.

It is a perspective view which shows the headrest holder of 1st Embodiment of this invention. It is a perspective view which shows the vehicle seat by which the headrest was supported by the headrest support structure provided with the headrest holder of 1st Embodiment of this invention. The headrest holder of the first embodiment of the present invention is a transverse cross-sectional view shown with the holder support member. It is a cross-sectional view which shows the headrest holder of a comparative example. It is a side view which shows the collision state of a collision body. It is a rear view which shows the collision state of a collision body. It is a cross-sectional view which shows the headrest holder of 1st Embodiment of this invention with the holder support member different from FIG. FIG. 8 is a cross-sectional view showing the headrest holder according to the first embodiment of the present invention together with a holder support member different from those in FIGS. 3 and 7.

  FIG. 1 shows a headrest holder 28 according to the first embodiment of the present invention. FIG. 2 shows the vehicle seat 12 in which the headrest 18 is supported by the headrest support structure 26 including the headrest holder 28. In the following, the vehicle width direction is indicated by an arrow W and the vehicle front direction is indicated by an arrow FR for convenience. Further, the width direction of the headrest holder 28 coincides with the vehicle width direction (arrow W direction).

As shown in FIG. 2 , the vehicle seat 12 includes a seat cushion 14, a seat back 16, and a headrest 18. An inverted U-shaped seat back frame 20 is disposed on the upper portion of the seat back 16. The seat back frame 20 is an example of a seat back frame member.

  A metal cylindrical holder support member 22 is fixed to the horizontal portion 20 </ b> A of the seat back frame 20. In the example shown in FIG. 2, the holder support member 22 is formed in a cylindrical shape having a horizontal cross section of a quadrangle (positive direction or rectangle), and is fixed to the horizontal portion 20 </ b> A so that the longitudinal direction is substantially vertical. Yes.

  Between the seat back frames 20, a wire member 24 is stretched along the vehicle width direction below the horizontal portion 20A.

As shown in FIG. 1, the headrest holder 28 is formed in a cylindrical shape with resin and has a holder main body 30 that is inserted into the holder support member 22. In the illustrated example, the lower portion of the holder body 30 is formed in a cylindrical shape having a side wall 30C, a front wall 30A, and a rear wall 30B. As shown in FIG. 2, the headrest stay 18 </ b> S of the headrest 18 is inserted into the holder body 30 from above. The lower end of the headrest holder 28 is the tip in the direction of insertion into the holder support member 22.

  A slit 32 is formed on the lower end side (one end side in the longitudinal direction) of the side wall 30 </ b> C of the holder main body 30, and a front deformation piece 34 and a rear deformation piece 36 are formed. And the slit 38 is further formed also in the lower end side of the back deformation piece 36 (rear wall 30B), the back deformation piece 36 is divided | segmented into the width direction, and the two bending pieces 40 are formed. Thereby, one end side in the longitudinal direction of the holder main body 30 is divided into the front deformable piece 34 and the two bent pieces 40. The two bending pieces 40 are opposed to each other by the facing surface 40F.

  As shown in FIG. 3, by forming the slit 32, the front deformation piece 34 can be bent and deformed in the direction of the arrow M1.

  Also in the two bending pieces 40, the slit 32 is formed, so that it can be bent and deformed in the direction of the arrow M2, and further, the slit 38 is formed so that it can also be bent and deformed in the direction of the arrow M3. ing. That is, both of the two bending pieces 40 can be bent and deformed in two directions of the arrow M2 direction and the arrow M3 direction, and actually, the two bending pieces 40 can be bent and deformed in an arrow M4 direction obtained by combining these two directions.

  On the outer surface of each distal end portion of the bending piece 40, a thick portion 42 is integrally formed with the bending piece 40 being thick on the outside. The thick portion 42 has a front end surface 42A on the front end side, a locking surface 42C on the rear end side, and a tapered surface 42T that is inclined outward from the front end surface 42A to the locking surface 42C. The tapered surface 42T is a side surface of the bending piece 40, and when the holder main body 30 is inserted into the holder supporting member 22 from the distal end surface 42A side, it contacts the holder supporting member 22 and bends the bending piece 40 in the arrow M4 direction. Deform. As for the front deformation piece 34, when the holder main body 30 is inserted into the holder support member 22 from the tip end face 42A side, a taper surface (not shown) contacts the holder support member 22, and the front deformation piece 34 is moved in the direction of the arrow M1. To bend and deform.

By deforming the front deformation piece 34 and the bending piece 40 in this way, the holder main body 30 can be inserted into the holder support member 22.

  When the holder main body 30 has the thick portion 42 penetrating the holder support member 22 and the thick portion 42 is pulled out to the lower end side of the holder support member 22, the flexure piece 40 is elastically restored, and the locking surface 42C is the holder support member. It is latched by the lower end surface 22B of 22. In this state, the upward movement of the headrest holder 28 from the holder support member 22 is suppressed. A locking portion 34K that is locked to the lower end surface 22B of the holder support member 22 is also provided on the front surface of the front deformation piece 34 in a state where the front deformation piece 34 is pulled out to the lower end side of the holder support member 22 and elastically restored. You may provide as needed.

  A boundary portion between the opposed surface 40F and the outer surface of the thick portion 42 is a first curved portion 42S that is smoothly curved.

  A boundary portion between the front end surface 42A and the tapered surface 42T is a second rounded portion 42R that is smoothly curved at the lower end portion of the thick portion 42.

  As shown in FIG. 3, when viewed from the horizontal cross section of the headrest holder 28 (the cross section in the direction orthogonal to the longitudinal direction), the outer surface of the thick portion 42 is a curved surface 42B that is curved so as to protrude outward. ing.

  Above the holder body 30, a flange 30 </ b> F that is longer than the holder body 30 in the vehicle width direction and the front-rear direction is formed. The flange portion 30 </ b> F suppresses the holder main body portion 30 from coming out downward when the holder main body portion 30 contacts the upper end surface of the holder support member 22.

  On the upper part of the side wall 30 </ b> C of the holder main body 30, a protrusion 30 </ b> T that protrudes along the longitudinal direction of the holder main body 30 is formed. The protrusion 30T is located between the holder main body 30 and the holder support member 22, and the holder main body 30 is held at a predetermined position in the holder support member 22, so that it is inadvertent in the front-rear direction and the vehicle width direction. To avoid rattling.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 3, the bending piece 40 can be bent and deformed in two directions, an arrow M2 direction and an arrow M3 direction. Here, as a comparative example, a headrest holder 88 having a structure in which the rear deformation piece 36 is not divided into the bending pieces 40 as shown in FIG. 4 is considered. In the structure of the comparative example, the rear deformation piece 36 does not bend and deform in the direction of the arrow M3 (see FIG. 3) (or the deformation amount is extremely small). Therefore, when the thick portion is formed in the portion indicated by the two-dot chain line L1, the headrest There is a possibility that the holder 28 cannot be inserted into the holder support member 22.

  On the other hand, in this embodiment, since the bending piece 40 can be bent and deformed in two directions of the arrow M2 direction and the arrow M3 direction, the thick portion is within a range including a portion indicated by a two-dot chain line L1 in FIG. 42 can be formed. As a result, as shown in FIG. 3, the thick portion 42 is positioned farther outside the lower end surface 22 </ b> B of the holder support member 22 in a state where the headrest holder 28 is inserted through the holder support member 22.

  In particular, in the present embodiment, the headrest holder 28 is inserted into the holder support member 22 so that the two thick portions 42 are both located on the rear side.

5 and 6 show a state in which a φ165 ball as a collision body CB collides from the rear side of the seat back 16. As described above, in the present embodiment, since the position outside the lower end surface 22B of the thick portions 42 Gaho holder support member 22, as shown in FIG. 5, the collision body CB is thick portion The thick portion 42 is contacted at the contact point T1 at the upper end of 42 or the contact point T2 at the lower end. Or depending on the position of the collision body CB, it may contact the taper surface 42T (between the contact point T1 and the contact point T2). Furthermore, when the collision body CB collides further upward, the upper cross member 16M in the seat back 16 may also come into contact. In either case, the collision body CB is prevented from contacting the holder support member 22.

  Further, also in a plan view of the seat back 16, the collision body CB is in contact with the thick portion 42 as shown in FIG. Since the thick part 42 is located outside the lower end surface 22B of the holder support member 22, the collision body CB comes into contact with the holder support member 22 as can be seen from the collision body CB indicated by a solid line, for example. Is suppressed. In particular, the first rounded portion 42S is formed at a position between the two bending pieces 40, and there is no edge. Therefore, even when the collision body CB collides toward the position between the two bending pieces 40 as in the collision body CB indicated by a two-dot chain line, there is no edge at the collision portion. Damage to the body CB can be suppressed.

  In addition, the contact point T2 on the lower end side shown in FIG. 5 is a portion where the second rounded portion 42R is formed in the thick portion 42. In other words, since the second rounded portion 42R is formed, there is no edge at the contact point T2, so that it is possible to suppress damage to the collision body CB that has contacted the headrest holder 28.

In order to suppress the collision body CB from coming into contact with the holder support member 22, for example, as shown by a two-dot chain line in FIG. 2 , the bent portion 24 </ b> B so that a part of the wire member 24 protrudes rearward. A structure that forms a layer is also conceivable. Further, the rear side of the upper portion of the seat back 16 is also believed that this provided a collision object can absorb panels such collision energy of CB. However, if the bent portion 24B of the wire member 24 is formed or a panel having the above structure is provided, the cost may increase and the weight may increase. In this embodiment, since the bending part 24B, panel, etc. of the wire member 24 are unnecessary, it can contribute to cost reduction and weight reduction.

  In addition, a thick part 42 having a sufficient thickness is formed with a simple structure that forms the bending piece 40 that can be deformed in two directions inside the holder main body 30, and the collision body CB contacts the holder support member 22. Can be suppressed.

  The shape of the outer surface of the thick portion 42 is not limited to the above. For example, a corner may be present, but if the curved shape as described above (curved shape protruding outward) is used, a sharp portion on the outer surface Therefore, damage to the collision body CB can be more effectively suppressed.

  As described above, the thickness of the thick portion 42 is not particularly limited as long as damage to the collision body CB can be effectively suppressed. However, in the structure in which the holder support member 22 is formed in a square cylinder shape, as shown in FIG. 3, the corner portion 22 </ b> C when viewed in plan (horizontal sectional view) is positioned outside the inner surface 22 </ b> U. It is preferable that the outer surface 22S is located further outside.

  Although the example which formed by dividing the longitudinal direction one end side (the insertion direction front-end | tip side to the holder support member 22) of the holder main-body part 30 was given as the bending piece 40, it may be divided into four or more. In the case of four divisions, for example, a slit similar to the slit 38 may be formed at the center in the width direction of the front deformation piece 34.

  However, if the number of divisions is increased too much, it becomes difficult to maintain the strength of the headrest holder. From the viewpoint of maintaining the strength of the headrest holder, it is preferable to set the headrest holder to about 3 to 4 divisions. In particular, if the structure is divided into three parts, the structure becomes simpler than the structure of four or more parts.

  In any case, when the thick portion 42 is located on the back side of the seat back 16, damage to the collision body CB colliding from the back side can be effectively suppressed.

  As the shape of the holder main body 30, a rectangular cylindrical shape has been described above, but a shape other than this, for example, a polygonal cylindrical shape other than a rectangular shape or a cylindrical shape may be used.

  As the holder support member 22, a rectangular tube-shaped member has been mentioned above. However, for example, a cylindrical holder support member 44 as shown in FIG. 7 or a rear side as shown in FIG. 8 is a part of a square tube. The holder support member 46 may have a shape such that the front side is a part of a cylinder.

12 Vehicle Seat 16 Seat Back 18 Headrest 18S Headrest Stay 20 Seatback Frame (Seatback Frame Member)
22 Holder support member 22B Lower end surface 26 Headrest support structure 28 Headrest holder 30 Holder body portion 40 Deflection piece 42 Thick portion 42B Curved surface 42R Second round portion CB Colliding body

Claims (9)

A holder main body formed in a cylindrical shape and containing a headrest stay therein;
A bending piece that is formed on one end side in the longitudinal direction of the holder main body and can be bent and deformed in two inner directions; and
A curved surface formed on the outer surface of the distal end portion of the flexure piece and curved outwardly when viewed in a cross section orthogonal to the longitudinal direction of the holder main body portion is inserted into the cylindrical holder support member. When penetrating elastically restoring the lower end surface of the holder support member is locked in positioned outside the lower end surface, the holder the thick portion you suppress contact of φ165 ball to the lower end surface of the edge of the support member When,
A headrest holder.   The headrest holder according to claim 1, wherein the thick portion is integrally formed with the bending piece.   3. The headrest holder according to claim 1, wherein the bending piece is formed by dividing the tip end side of the holder main body portion in the insertion direction into the holder support member into at least three parts.   The said curved piece is provided with two or more, The curved 1st round part is formed between the opposing surface of a flexible piece, and the outer surface of the said thick part of each flexible piece. The headrest holder according to item 1.   The headrest holder according to any one of claims 1 to 4, wherein a second rounded portion that is curved is formed between a front end surface and a side surface of the thick portion. A headrest holder according to any one of claims 1 to 5,
A holder support that is mounted in a seat back and the headrest holder is inserted and the thick wall portion is locked at the lower end surface to prevent the headrest holder from coming off and contact of the φ165 ball to the edge of the lower end surface is suppressed. Members,
A headrest including a headrest stay inserted from above into the holder main body of the headrest holder;
Headrest support structure having A holder main body portion that is formed in a cylindrical shape and accommodates a headrest stay therein, a bending piece that is formed on one end in the longitudinal direction of the holder main body portion and can be bent and deformed in two inner directions, and an outer surface of the distal end portion of the bending piece A headrest holder having a thick-walled portion that is locked to the lower end surface of the holder support member by elastic recovery when the holder main body portion is inserted through and penetrates the cylindrical holder support member;
A holder support that is mounted in a seat back and the headrest holder is inserted and the thick wall portion is locked at the lower end surface to prevent the headrest holder from coming off and contact of the φ165 ball to the edge of the lower end surface is suppressed. Members,
A headrest including a headrest stay inserted from above into the holder main body of the headrest holder;
Headrest support structure having   The headrest support structure according to claim 6 or 7, wherein the thick portion is located on a back side of the seat back. A seat back skeleton member disposed in the seat back;
The headrest support structure according to any one of claims 6 to 8, wherein the holder support member is attached to the seatback skeleton member.
A vehicle seat having:

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