JP3221332B2 - 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 stays suspended from the headrest main body are inserted and held through a pair of left and right holder brackets provided at the upper end of the seat back frame via a resin stay holder. It is provided by doing.

FIG. 6 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. 7). This seat back frame 5
As is clear from FIG. 7, a pair of tubular holder brackets 6, 6 (only one is shown) are 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.

In FIGS. 6 and 7, reference numerals 8, 8 denote resin stay holders provided by being inserted into the holder brackets 6, 6, and these left and right stay holders 8,
The left and right stays 2a, 2a of the headrest 2 are inserted into and held by the headrest 8, and although not shown, the height can be adjusted by appropriate height adjusting means in the vertical direction.

[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 brackets 6, by locking the 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. 7, reference numeral 4a denotes a seat pad constituting the seat back 4, reference numeral 4b denotes a trim cover which covers the outside of the seat pad 4a, and reference numeral 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, when the stay holder 8 is to be replaced, when the trim cover 4b is to be removed and replaced, when the seat pad 4a is to be removed and the outer periphery or the lower part of the frame is to be cleaned, or when dismantling, etc. It is necessary to remove it from the holder bracket 6. In particular, the head 8a of the stay holder 8 is attached to the trim cover 4 of the seat back 4.
Since the hole 4c is larger than the hole 4c, the trim cover 4b and the seat pad 4a cannot be replaced or dismantled unless the holder 8 is removed.

However, the conventional stay holder cannot be pulled out by a simple pulling-out operation from the outside of the sheet by itself. For this reason, conventionally, as shown in FIG. 7, 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 to 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 of the seat back 4 is performed. Such work has to be done by groping, which makes the work complicated.

In order to solve such a problem, the stay holder 8 and the holder bracket 6 have been modified so that the stay holder 8 can be pulled out from the outside of the seat. Gazette, Japanese Utility Model Application Laid-Open No. 61-199255, and Japanese Utility Model Application
It has been conventionally proposed in, for example, Japanese Patent No. 76351.

However, these conventional structures have disadvantages such as a complicated structure, high cost, and a difficulty that the function of the stay holder 8 cannot be obtained because the stay holder 8 is easily detached from the holder bracket 6. There is a need for a headrest stay holder structure that can secure the function as a stay holder with an even 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. An object of the present invention is to provide a headrest stay holder structure that can be easily extracted and removed by a simple removal operation from the outside of a seat.

[0012]

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 resilient piece having a locking claw that can be locked to a lower end edge of the holder bracket, and a positioning convex portion near a head of the cylindrical body, Portions are provided with anti-rotation protrusions, and a notch groove is formed in the upper end portion of the holder bracket over a range of approximately 90 ° in the circumferential direction, and a positioning protrusion is formed on one side edge of the notch groove. Department The stay holder and the holder bracket are positioned by abutment, and a rotation preventing engagement hole is provided at a portion corresponding to the rotation preventing protrusion, and the positioning protrusion of the stay holder is positioned on one side of the notch groove. By rotating from the side edge toward the other side edge of the holder bracket, the engagement between the anti-rotation protrusion and the engagement hole can be released, and the lower end edge of the holder bracket in the circumferential direction can be released. Two tongue-shaped pieces are extended downward at two places on the left and right sides, and the locking claws of the elastic piece are slidably contacted with the inner side surface of the tongue-shaped piece of the holder bracket so as to be located inside the holder bracket inner peripheral surface. It is characterized by being elastically deformed as described above.

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 from above, and
When removing the holder, the holder can be easily pulled out from the outside of the seat and removed simply by rotating the holder approximately 90 ° in the circumferential direction.

[0014]

1 to 5 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 a cylindrical holder bracket provided on the upper frame 5 of the seat back, and reference numeral 20 denotes a stay holder that is inserted into the holder bracket 10 and holds the headrest stay in a fitted state.

As shown in FIGS. 1 to 5, 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 24, 24 which are elastically deformable by a slit 24a at the lower end thereof and which can be locked to the lower edge of the holder bracket 10 on the outer peripheral portion.
It is composed of In the portion of the cylindrical body 22 near the head 21, a positioning projection 2 used for preventing erroneous front-rear assembly when assembling to the holder bracket 10.
5 are provided.

According to the present invention, the cylindrical body 22
In the portion near the lower end of one of the elastic pieces 24 in FIG. This anti-rotation projection 2
As shown in FIGS. 1, 2 and 4, when the stay holder 20 is inserted into the holder bracket 10, or when the stay holder 20 is engaged with an edge of an engagement hole described later, the elastic piece described above is used. The portion 24 is formed to have a shape and an amount of protrusion that cause elastic deformation.

On the other hand, as shown in FIGS. 1, 2 and 5, the upper end of the holder bracket 10 has a predetermined range in the circumferential direction, for example, approximately 90 ° in the embodiment shown in FIG.
As described above, the large notch groove 11 is formed. 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 by about 90 ° with respect to the holder bracket 10 toward the other side edge 11b of the notch groove 11.

As shown in FIGS. 1, 2 and 4, the anti-rotation projection 26 is engaged with the lower end of the holder bracket 10 corresponding to the anti-rotation projection 26. Rotation preventing engagement hole 12 is provided. Furthermore,
As shown in FIGS. 1, 2, and 3, a pair of tongue-shaped pieces 13, 13 extend downward at two lower left and right edges of the holder bracket 10 in the circumferential direction. It is provided in the state where it is made to be.

When the stay holder 20 is mounted on the holder bracket 10, the tongues 13, 13, as shown in FIG. 2 and FIG. Can be engaged with the lower edge of the holder bracket 10, and when the stay holder 20 is rotated by approximately 90 °, as shown in FIG.
Elastic deformation of the elastic pieces 24, 24 causes the engagement claws 23, 23 to be located inside the inner peripheral surface of the holder bracket 10.

The stay holder 20 is inserted into the holder bracket 10, and the positioning projection 25 is engaged with the notch groove 11 in a state where the projection 25 abuts against one side edge 11 a of the notch groove 11. Is engaged with the engagement hole 12 so that the stay holder 20 can be assembled and fixed to the holder bracket 10.

At this time, the locking claws 23, 23 of the elastic pieces 24, 24 are engaged with the lower edge of the holder bracket 10, as shown in FIGS. By sandwiching the holder bracket 10 between the locking claws 23, 23, the stay holder 20 can be kept in a fixed state.

When the stay holder 20 is to be removed in the state shown in FIG.
2 and 5, by rotating the positioning projection 25 so as to approach the other side edge 11b side of the notch groove 11, as indicated by a broken arrow in FIG. Can be forcibly released by utilizing the elastic deformation of the elastic piece 24. The rotational force at this time may be such a force as to cause a displacement such that the above-described rotation preventing convex portion 26 enters the inner peripheral surface of the holder bracket 10.

Further, during this rotation, as is apparent from FIGS. 3 (a) and 3 (b), the elastic pieces 24, 24
Of the tongue-shaped pieces 13, 13 by sliding the locking claws 23, 23 so as to be elastically deformed by using the slit 24a so as to be located inside the inner peripheral surface of the holder bracket 10. it can. In this state, the stay holder 20 can be easily pulled out from the outside of the sheet and removed.

Therefore, in such a configuration, the seat back frame 5 can be simply inserted by simply inserting the stay holder 20.
It can be securely attached to the holder bracket 10 on the side. In this state, the stays 2a, 2a
Can be secured as a stay holder 20 for maintaining the height in an adjustable state.

When removing the stay holder 20, the stay holder 20 can be removed by a very simple operation of rotating the stay holder 20 by approximately 90 ° in the circumferential direction, picking up the head 21 from the outside of the sheet, and pulling the head upward. .

It should be noted that the present invention is not limited to the structure in the above-described embodiment, and it goes without saying that the shape and structure of each part can be appropriately modified and changed. For example, in the above-described embodiment, the rotation preventing convex portion 26 is configured to be inserted into the holder bracket 10 or rotated by utilizing the elastic deformation of the elastic pieces 24, 24. , But is not limited to this. In short, any configuration may be used as long as the stay holder 20 can be inserted and rotated into the holder bracket 10 and rotated. 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.

[0028]

As described above, according to the headrest stay holder structure according to the present invention, the stay holder inserted into the tubular holder bracket of the seat back frame includes the head, the tubular body, and the lower end thereof. And a resilient piece having an outer portion having a locking claw that is elastically deformable by being slit and can be locked to the lower edge of the holder bracket, and is positioned at a portion near the head of the cylindrical body. The cylindrical body portion is provided with a rotation preventing convex portion, and the upper end portion of the holder bracket is provided with approximately 90
The notch groove is formed over the range of °, the positioning protrusion is abutted against one side edge of the notch groove, the stay holder and the holder bracket are positioned, and the rotation preventing protrusion is formed. A rotation preventing engagement hole is provided in a corresponding portion, and the positioning protrusion of the stay holder is rotated from one side edge of the notch groove toward the other side edge to thereby prevent the rotation. The tongue-shaped pieces are extended downward at two right and left circumferential positions of the lower end edge of the holder bracket, so that the elastic pieces are locked. Since the claw portion is slidably contacted with the inner surface of the tongue-shaped piece of the holder bracket and is elastically deformed so as to be located inside the inner peripheral surface of the holder bracket, despite the simple configuration, the following excellent features are provided. It has the effect.

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 secure the function as the stay holder. By simply rotating the stay holder by approximately 90 ° in the circumferential direction, it can be easily pulled out from the outside of the sheet and removed.

That is, according to the present invention, the stay holder is inserted into the holder bracket, and the positioning protrusion of the stay holder is brought into contact with one side edge of the cutout groove at the upper end of the holder bracket to be engaged. By engaging the anti-rotation protrusion of the stay holder with the engagement hole on the holder bracket side, the stay holder can be securely assembled and fixed to the holder bracket. Further, the above-mentioned stay holder is rotated substantially 90 ° in the circumferential direction so that the positioning protrusion approaches the other side edge side of the notch groove of the holder bracket, and the engagement hole of the rotation prevention protrusion of the stay holder is rotated. Is released by the elastic deformation of the elastic piece, and the locking claw of the elastic piece is slidably contacted with the inner surface of the tongue-shaped piece of the holder bracket so as to be located inside the inner peripheral surface of the holder bracket. By elastically deforming
It can be easily pulled out from the outside of the seat.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of a headrest stay holder structure according to the present invention.

3A and 3B show a headrest stay holder structure according to the present invention, wherein FIG. 3A is a cross-sectional view taken along the line III-III of FIG. 2, and FIG.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 2, showing a headrest stay holder structure according to the present invention.

FIG. 5 is a sectional view taken along the line VV of FIG. 2, showing a headrest stay holder structure according to the present invention.

FIG. 6 is a perspective view of a headrest mounting portion showing a conventional headrest stay holder structure in a vehicle seat.

FIG. 7 is a cross-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 12 Rotation prevention engagement hole 13 Tongue piece 20 Stay holder 21 Head Part 22 Cylindrical body part 23 Engagement claw part 24 Elastic piece part 24a Slot 25 Positioning convex part 26 Rotation preventing convex part

Continuation of the front page (56) References JP-A-61-190245 (JP, U) JP-A 5-76351 (JP, U) JP-A 6-68548 (JP, U) JP-A 6-72442 (JP , U) Shokai 60-199255 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47C 7/38 B60N 2/48

Claims (1)

(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. And a resilient piece having a locking claw provided on the lower end side of the body so as to be elastically deformable by slitting and capable of being locked on a lower edge of the holder bracket. A positioning convex portion is provided on a portion of the cylindrical body near the head, and a rotation preventing convex is provided on the cylindrical body, and an upper end portion of the holder bracket has a range of approximately 90 ° in a circumferential direction. A notch groove is formed, and a 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 the rotation preventing protrusion. Is provided with a rotation preventing engagement hole, and the positioning protrusion of the stay holder is rotated from one side edge of the notch groove toward the other side edge, whereby the rotation prevention protrusion is formed. And a tongue-like piece is extended downward at two places on the left and right sides in the circumferential direction of the lower end edge of the holder bracket, and the locking claw part of the elastic piece part is disengaged. A headrest stay holder structure, wherein the headrest stay holder structure is slidably brought into contact with the inner surface of the tongue-shaped piece of the holder bracket and elastically deformed so as to be located inside the inner peripheral surface of the holder bracket.