JP3219129B2 - Headrest stay holder structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headrest stay for adjusting the height of a headrest stay, for example, in a vehicle seat, by fitting the headrest stay into a holder bracket provided as a headrest mounting portion at the upper end of a seat back frame. Regarding the holder structure.

[0002]

2. Description of the Related Art A headrest is provided at the upper end of a seat back of a vehicle seat or the like so that the height can be adjusted vertically. That is, in this type of headrest, the left and right headrest stays hanging down from the headrest body are fitted and inserted into a pair of left and right holder brackets provided at the upper end portion of the seat back frame via a resin stay holder. It is provided by holding.

FIG. 7 shows a conventional vehicle seat 1 having a headrest 2, in which 3 is a seat cushion, 4 is a seat back, and 5 is a pipe frame or the like provided in the seat back 4. It is a seat back frame (see FIG. 8). This seat back frame 5
As is evident from FIG. 8, a pair of tubular holder brackets 6, 6 (only one is shown) is formed at the left and right positions at a predetermined interval at the upper end of the frame 5 as is apparent from FIG. Are fixedly provided by welding or the like.

Reference numerals 8 in FIGS. 7 and 8 denote resin stay holders provided by being inserted into the holder brackets 6 and 6, respectively.
8 shows the left and right headrest stays 2 of the headrest 2
a and 2a are inserted and held, and the height can be adjusted by appropriate height adjusting means (not shown).

[0005] The stay holders 8, 8 are formed by attaching a cylindrical body 8b hanging down from a head 8a to the holder brackets 6,6.
6, and is fixedly attached to the lower end of the bracket 6 by locking the locking claw portions 8 c, 8 c of the elastic pieces provided at the insertion end so as to be elastically deformable by slitting or the like.

In FIG. 8, reference numeral 4a denotes a seat pad constituting the seat back 4, 4b denotes a trim cover for covering the outside of the seat pad 4a, and 9 denotes an internal frame provided in the seat back 4. In addition, the above-mentioned sheet 1 is, as is well known,
Parts required as a seat, such as a reclining mechanism, are provided, but detailed description thereof is omitted.

[0007]

In the conventional headrest stay supporting portion at the upper end portion of the seat back as described above, the stay holder 8 may be once detached from the holder bracket 6 after being assembled. For example, it is necessary to replace the stay holder 8, to remove and replace the trim cover 4b, to remove the seat pad 4a to clean the outer periphery or lower portion of the frame, and to disassemble the frame.

In such a case, it is necessary to pull out the above-mentioned stay holder 8 from the holder bracket 6. In particular, since the head 8a of the stay holder 8 is larger than the hole 4c of the trim cover 4b of the seat back 4, the trim cover 4b or the seat pad 4a must be replaced or disassembled without removing the stay holder 8. Cannot be performed.

However, the conventional stay holder cannot be pulled out by a simple pull-out operation from the outside of the sheet by itself. For this reason, conventionally, as shown in FIG. 8, an operator inserts his hand through an opening opened in a part of the trim cover 4b on the back side of the seat back 4 and is locked by the lower end of the holder bracket 6. The locking claw portions 8c, 8c of the stay holder 8 are pinched and elastically deformed, whereby a troublesome work of pulling out from the upper end portion of the seat back 4 is performed. In particular, since such work is performed by groping, the work is complicated.

[0010] In order to solve such a problem, the stay holder 8 and the holder bracket 6 have been worked out so that the stay holder 8 can be pulled out from the outside of the seat. No. 190245, Japanese Utility Model Application Laid-Open No. 61-199255, and Japanese Utility Model Application
-76351 has conventionally proposed this.

However, these conventional structures have disadvantages such as a complicated structure and high cost, and a difficulty in functioning as a stay holder because the stay holder 8 is easily detached from the holder bracket 6. Therefore, there is a demand for a headrest stay holder structure that can secure the function as a stay holder with a simpler configuration and that can be pulled out of the seat by a simple removal operation.

The present invention has been made in view of such circumstances, and can be securely mounted on a holder bracket on a seatback frame side as a headrest stay holder, while securing the function as a stay holder. It is an object of the present invention to obtain a headrest stay holder structure that can be easily pulled out and removed by a simple removal operation such as rotation and removal from the outside of the seat.

[0013]

SUMMARY OF THE INVENTION In order to meet such an object, a headrest stay holder structure according to a first aspect of the present invention includes a tubular holder bracket provided on an upper frame of a seat back, and a bracket inserted into the bracket. The headrest stay is fitted and held, and the headrest is provided with a head, a cylindrical trunk extending from the head, and a slit at the lower end of the trunk to be elastically deformable. And a pair of elastic pieces having a locking claw that can be locked to a lower edge of the holder bracket, and a flat surface parallel to each other on both sides provided with slits of the cylindrical body. While forming, a positioning convex portion is provided at a portion near the head of the cylindrical body, and a notch groove is formed at an upper end portion of the holder bracket over a range of approximately 90 ° in a circumferential direction, The positioning protrusion is abutted against one side edge of the notch groove to position the stay holder and the holder bracket, and a portion corresponding to a flat surface on both side portions of the cylindrical body is provided with a rotation preventing member. By providing a joint wall portion and rotating the stay holder so that the positioning convex portion located on one side edge of the notch groove is located on the other side edge of the notch groove, a pair of elastic members is provided. It is characterized in that the space between the one portions is made narrow so that the stay holder can be pulled out upward.

Further, in the headrest stay holder structure according to a second aspect of the present invention, a pair of recesses are formed on both sides of the cylindrical holder bracket which oppose each other in a part of the longitudinal direction, and the engagement for preventing rotation is provided. The wall portion is formed on the inner surface of the holder bracket by these concave portions.

Further, the headrest stay holder structure according to a third aspect of the present invention has a locking claw portion at a lower end side from a portion where flat surfaces parallel to each other are formed on both sides of the stay holder provided with slits. It is characterized in that it is formed so as to be narrower over the elastic piece.

According to the present invention, the stay holder can be assembled and held on the holder bracket on the seat back frame side by simply inserting the stay holder, and when removing the stay holder, the stay holder is rotated and pulled out. It can be easily pulled out from the outside of the seat and removed.

According to the present invention, when the stay holder is inserted into the holder bracket and assembled, the head holder comes into contact with the upper end edge of the holder bracket and the elastic piece portion is attached to the lower end edge. Is held in a locked state. Then, at this time, the positioning convex portion of the stay holder is locked to one side edge in the notch groove of the holder bracket. The contact of the flat surfaces on both sides allows centering and rotation prevention of both members.

Further, when the positioning holder is forcibly rotated by about 90 ° in the direction toward the other side edge in the notch groove, the flat surface on both sides, and furthermore, the elastic piece portion is rotated. The outer peripheral surface is in sliding contact with the engagement wall portion, the width between the pair of elastic pieces is reduced, and can be removed from the holder bracket by being pulled out from above.

[0019]

1 to 6 show an embodiment of a headrest stay holder structure according to the present invention. In these drawings, only a portion relating to a headrest stay holder structure which is a main part of the present invention is shown. Illustration of other components is omitted.

Reference numeral 10 denotes the upper frame 5 of the seat back.
5 is inserted into the holder bracket 10 and the headrest stay (FIG. 5) is inserted into the holder bracket 10.
(Indicated by 2a).

As shown in FIGS. 1 to 6, the stay holder 20 has a head 21 and a cylindrical body 22 having a smaller diameter than the head 21.
And a pair of elastic pieces 2 having, on the outer periphery thereof, locking claw portions 23, 23 which can be elastically deformed by a slot 24a on the lower end side thereof and can be locked on the lower end edge of the holder bracket 10.
4, 24.

At the portion of the cylindrical body 22 near the head 21, there is provided a positioning projection 25 used to prevent erroneous front-rear assembly when assembling to the holder bracket 10. According to the present invention, as shown in FIGS. 2 (a), 4 and 6 (a), flat surfaces 26 parallel to each other are provided on both sides of the cylindrical body 22 where the slit 24a is provided. , 2
6 are provided.

On the other hand, at the upper end of the holder bracket 10, as shown in FIGS. 1 and 3, a large notch groove 11 is formed over a predetermined range in the circumferential direction. The notch groove 11 corresponds to the positioning projection 25 of the stay holder 20. When the positioning projection 25 is brought into contact with one side edge 11a of the notch groove 11 and engaged therewith, the holder 21 and the holder 25 are in contact with each other. Positioning with the bracket 10 is performed.

Further, the notch groove 11 allows the positioning projection 25 to rotate toward the other side edge 11b. That is, the stay holder 20 can be rotated with respect to the holder bracket 10 at an angle of, for example, approximately 90 ° toward the other side edge 11b of the notch groove 11.

A pair of recesses 13a, 13a are formed by pressing and deforming the holder bracket 10 from both sides at a substantially central portion in the longitudinal direction. These recesses 1
As shown in FIGS. 2 (b), 6 (a) and 6 (b), 3a and 13a are rotation-preventing engagement walls with which flat surfaces 26 and 26 on both sides of the stay holder 20 are engaged. 13,
13 is formed on the inner surface of the holder bracket 10.

Incidentally, the engaging wall portions 13 are not limited to the above-mentioned pressurized and deformed concave portions 13a. When the holder bracket 10 is made of synthetic resin, the engaging wall portions 13 13, 13 may be provided by projecting from the inner surface of the holder bracket 10.

The stay holder 20 is shown in FIG.
As shown in FIG. 5, the elastic piece 2 having the locking claws 23, 23 at the lower end side from the portions where the flat surfaces 26, 26 parallel to each other are formed on both sides provided with the slits 24a, 24a.
It is formed so as to become thinner toward 4,24. As shown in FIG. 5, when the stay holder 20 is rotated and pulled out, the formation portions of the engagement wall portions 13
This is to allow the locking claw portions 23 to pass through.

According to the configuration described above, the stay holder 2
0 can be assembled and held on the holder bracket 10 on the seat back frame 5 side by simply inserting it, and when the stay holder 20 is to be removed, the stay holder 20 can be easily rotated and pulled out from the outside of the seat. Can be removed and removed.

That is, according to the present invention, when the stay holder 20 is inserted into the holder bracket 10 and assembled, as shown in an imaginary line in FIG. 5 and FIG. 21 abuts on the upper end edge of the holder bracket 10 and has the locking claw 2
3 is held in a locked state. At this time, the positioning projection 25 of the stay holder 20 is formed so that the notch groove 11 extends over a range of approximately 90 ° in the circumferential direction of the holder bracket 10.
In a state locked to one side edge 11a.

Furthermore, the flat surfaces 26, 26 on both sides of the stay holder 20 abut against the rotation preventing engagement walls 13, 13 in the holder bracket 10, so that these two members can be centered and detented. Can be performed.

At this time, as shown in FIGS. 3, 4, and 6A, the locking claws 23, 23 of the elastic pieces 24, 24
The lower end of the holder bracket 10 is engaged, and the head bracket 21 and the locking claws 23, 23 engage the holder bracket 10.
, The stay holder 20 can be kept in a fixed state.

In particular, when the headrest stay 2a is inserted and held in the stay holder 20, the flat surface 2
In the state of being engaged with the engaging wall portions 13 and 13 of the
Since the width of the elastic pieces 24 cannot be reduced,
The stay holder 20 does not come off.

When the positioning holder 25 is forcibly rotated by about 90 ° in the direction toward the other side edge 11b in the notch groove 11, the flat surfaces 26 on both sides are formed. , 26, and the outer peripheral surfaces of the elastic pieces 24, 24 are in sliding contact with the engaging walls 13, 13, and a pair of elastic pieces 24,
24 becomes narrower than the inner diameter of the bracket 10 as shown by the solid line in FIG. 5 and FIG. 6B, and can be removed from the holder bracket 10 by being pulled out from above.

The rotational force at this time is such that the outer peripheral surfaces of the flat surfaces 26, 26 on both sides and the elastic pieces 24, 24 having the locking claws 23, 23 are in sliding contact with the engaging wall portions 13, 13. It is preferable to apply a force that generates a displacement that can be raised. Therefore, when removing the stay holder 20, it can be removed by rotating the stay holder 20 and picking up the head 21 from the outside of the sheet and pulling it out.

It should be noted that the present invention is not limited to the structure of the above-described embodiment, and it is needless to say that the shape and structure of each part can be appropriately modified and changed. For example, in the embodiment described above, the holder bracket 10 is formed of a pipe body,
The recesses 13a, 13a are provided by pressurizing and deforming the middle thereof from both sides with a press or the like.
3, 13 are formed, but not limited to this.

Further, the present invention is not limited to the support portion of the headrest stay in the vehicle seat, and is applicable to the support portion of the headrest stay in various seats.

[0037]

As described above, according to the headrest stay holder structure of the present invention, the stay holder inserted into the tubular holder bracket of the seat back frame has a head and a cylinder extending from the head. A cylindrical body, and a pair of elastic pieces provided at the lower end of the body so as to be elastically deformable by slitting and having a locking claw that can be locked to a lower edge of the holder bracket. A flat surface parallel to each other is formed on both sides where the body slit is provided, and a positioning convex portion is provided at a portion near the head of the cylindrical body, and approximately 90 ° in the circumferential direction at the upper end of the holder bracket. A notch groove is formed over the range of the notch groove, and the positioning holder is abutted against one side edge of the notch groove to position the stay holder and the holder bracket, and both side portions of the cylindrical body portion Flat in An engagement wall portion for preventing rotation is provided at a portion corresponding to the surface, and a positioning projection located at one side edge of the notch groove is positioned so as to be located at the other side edge of the notch groove. By rotating the holder, the width between the pair of elastic pieces is reduced, and the stay holder can be pulled out upward. It has excellent effects.

That is, according to the present invention, it is possible to assemble and hold the stay holder on the holder bracket on the seat back frame side by simply inserting the stay holder, and to remove the stay holder by approximately 90 ° By simply rotating and pulling out, the seat can be easily pulled out and removed from the outside of the seat.

According to the present invention, a pair of recesses are formed on both sides of the cylindrical holder bracket which are opposed to each other in a part of the longitudinal direction, and the engagement bracket for preventing rotation is formed by the holder bracket. By forming it from the part where the flat surfaces parallel to each other are formed on both sides where the slit of the stay holder is formed to the elastic piece part having the locking claw part on the lower end side, it is formed so as to become thinner. The positioning protrusion of the stay holder is locked to one side edge within the notch groove of the holder bracket, so that proper positioning can be performed and the stay holder is provided with an engagement wall portion for preventing rotation in the holder bracket. There is an advantage that both members can be centered and detented by contacting the flat surfaces on both sides of the member.

According to the present invention, when the positioning holder is forcibly rotated by approximately 90 ° in the direction toward the other side edge in the notch groove, the flat surface on both sides is formed. Further, the outer peripheral surfaces of the pair of elastic pieces are in sliding contact with the engagement wall section, the width between the pair of elastic pieces is reduced, and the pair of elastic pieces can be removed from the holder bracket by being pulled out from above.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a headrest stay holder structure according to the present invention.

2A and 2B show a headrest stay holder structure according to the present invention, wherein FIG. 2A is a cross-sectional view taken along the line IIa-IIa of FIG. 1, and FIG. 2B is a cross-sectional view taken along the line IIb-IIb of FIG.

FIG. 3 is a perspective view of a headrest stay holder structure according to the present invention.

FIG. 4 is a side view showing a stay holder having a headrest stay holder structure according to the present invention.

FIG. 5 is an enlarged sectional view of a main part of a headrest stay holder structure according to the present invention.

6A and 6B show a headrest stay holder structure according to the present invention, wherein FIG. 6A is a cross-sectional view showing a state in which a locking claw is engaged with a lower end edge of a holder bracket, and FIG. Sectional drawing which shows the state at the time of pulling out.

FIG. 7 is a perspective view of a headrest mounting portion showing a conventional headrest stay holder structure in a vehicle seat.

FIG. 8 is a sectional view showing a state where a conventional headrest stay holder is removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Headrest 2a Headrest stay 3 Seat cushion 4 Seatback 5 Seatback frame 10 Holder bracket 11 Notch groove 11a Side edge 11b Side edge 13 Engagement wall part 13a Depression 20 Stay holder 21 Head 22 Tubular Body 23 Locking claw 24 Elastic piece 24a Slot 25 Positioning projection 26 Flat surface

Continued on the front page (56) References JP-A 6-46551 (JP, U) JP-A 6-72442 (JP, U) JP-A 3-87347 (JP, U) JP-A 61-190245 (JP) , U) Hikaru 2-19343 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47C 7/38 B60N 2/48

Claims (3)

(57) [Claims] 1. A head holder comprising: a tubular holder bracket provided on an upper frame of a seat back; and a stay holder inserted into the bracket and holding a headrest stay in a fitted state. A cylindrical body extending from the portion, and a pair of elastic pieces having a locking claw provided on the lower end side of the body so as to be elastically deformable by slitting and capable of locking to a lower edge of the holder bracket; And forming flat surfaces parallel to each other on both sides of the cylindrical body portion provided with slits, and providing a positioning convex portion at a portion near the head of the cylindrical body portion, the holder bracket A notch groove is formed in the upper end portion over a range of approximately 90 ° in the circumferential direction, and a positioning projection is abutted against one side edge of the notch groove to position the stay holder and the holder bracket. And an engagement wall portion for preventing rotation is provided at a portion corresponding to a flat surface on both side portions of the cylindrical body portion, and a positioning convex portion located at one side edge of the notch groove is notched. By rotating the stay holder so as to be located on the other side edge of the groove, the width between the pair of elastic pieces is made narrower, and the stay holder can be pulled out upward. Characteristic headrest stay holder structure. 2. A pair of concave portions are formed on both sides of the cylindrical holder bracket which are opposed to each other in a part of the longitudinal direction, and the engagement wall portion for preventing rotation is formed on the inner surface of the holder bracket by the concave portions. 2. The method according to claim 1, wherein
The headrest stay holder structure according to 1. 3. A structure in which both sides of the stay holder provided with slits are formed so as to be thin from a portion having flat surfaces parallel to each other to an elastic piece having a locking claw portion at a lower end side. The headrest stay holder structure according to claim 1 or 2, wherein