JPH0576350U - Headrest stay support mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a support mechanism for a headrest stay that can prevent rattling of a support member for inserting and holding the headrest stay and generation of abnormal noise. [Structure] A support in which a tubular bracket 2 fixed to a seat back frame 1 is formed in a polygonal shape, and a holder portion 5 is in contact with an inner wall surface of the tubular bracket 2 to form a plurality of contact surfaces 7 for preventing rotation. A member 3 inserted and supported.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a headrest stay support mechanism capable of preventing rattling and abnormal noise of a support member for inserting and holding a headrest stay.

[0002]

[Prior Art]

 As a support mechanism of a headrest stay in an automobile seat, for example, as disclosed in Japanese Patent Laid-Open No. 58-92232, a support member is mounted in a tubular bracket fixed to a seat back frame, and the headrest stay is inserted and held therein. It is known that the support member of this type of headrest stay has a cylindrical bracket and a support member both having a cylindrical shape, so that the support member rotates inside the bracket. There is a problem that rattling or abnormal noise is generated, and in order to prevent this, it is necessary to attach a stopper mechanism etc. for rotation prevention, which complicates the structure and complicates the assembly work. was there. Furthermore, since the cylindrical bracket has a small amount of welding margin for fixing to the seat back frame, it is troublesome that a connecting member is required or a special shape is required because it is necessary to secure the welding margin. There's a problem.

[0003]

[Problems to be solved by the device]

 The present invention solves the above-mentioned conventional problems, prevents the support member from rotating in the bracket, and reliably prevents rattling and noise, and also prevents the stopper from rotating. The present invention was completed with the object of providing a headrest stay support mechanism that does not require a mechanism or a special connecting member for welding, and has an extremely simple structure that allows easy assembly work.

[0004]

[Means for Solving the Problems]

 The headrest stay support mechanism of the present invention, which has been made to solve the above-mentioned problems, is a headrest in which a support member is mounted in a tubular bracket fixed to a seatback frame and the headrest stay is inserted and held therein. In the stay support mechanism, the tubular bracket is formed into a polygonal shape, and a plurality of abutting surfaces that come into contact with the inner wall surface of the tubular bracket to prevent rotation are formed in the holder portion of the support member. To do.

[0005]

【Example】

 Next, the present invention will be described in detail by taking a headrest stay supporting mechanism in the illustrated vehicle seat as an example. In the figure, 1 is a seat back frame made of an iron pipe embedded in the seat back, 2 is a pair of tubular brackets made of iron fixed to a predetermined position of the seat back frame 1, and 3 is a tubular bracket 2. It is a synthetic resin support member that is fitted to.

The tubular bracket 2 has a polygonal cross section and has a plurality of inner wall surfaces with a flat inner surface. The wall surface is welded and fixed to the mounting surface of the seat back frame 1. The shape of the tubular bracket 2 is not limited to a quadrangle, and may be, for example, a substantially triangular shape as shown in FIG. A triangle or a pentagon can be given directionality.

On the other hand, the support member 3 is provided with a stay insertion hole 4 for inserting and supporting a headrest stay penetrating vertically in the central portion, and is formed from a holder portion 5 at an upper portion and an insertion portion 6 at a lower portion. It is configured. The holder portion 5 has a quadrangular shape similar to the tubular bracket 2 and has an outer diameter substantially equal to the inner diameter of the tubular bracket 2, and each outer peripheral surface has an inner wall surface of the tubular bracket 2. A flat abutment surface 7 is formed which abuts against and prevents rotation. It should be noted that the holder 5 has a shape corresponding to the inner shape of the tubular bracket 2, and basically all the outer peripheral surfaces are the contact surfaces 7 for preventing rotation, but the entire outer peripheral surface is abutted. It is not necessary to form the contact surface 7, and for example, the contact surface 7 may be provided on a part of the outer peripheral surface as shown in FIG. Further, a flange portion 5a is formed on the upper end portion of the holder portion 5, and a protrusion 5b is formed on the lower surface of the flange portion 5a so as to maintain a constant distance between the flange portion 5a and the bracket 2. Thus, as shown in FIG. 2, the skin material 20 is prevented from being crushed. On the other hand, the insertion portion 6 has a cylindrical shape having an outer diameter smaller than the inner diameter of the tubular bracket 2 so that the insertion work can be easily performed, and the lower end portion of the insertion portion 6 engages with the lower end surface of the bracket 2. The joint projection 6a and the slit portion 6b for applying an elastic force to the engagement projection 6a are provided.

Further, as shown in FIG. 6, two cylindrical tubular brackets 2 and 2 fixed in parallel to a seat back frame 1 are assumed to have different lengths L1 and L2 between the left and right sides, for example. Alternatively, as shown in FIG. 7, the widths W1 and W2 may be different, or the cross-sectional shapes may be different. By combining with the shape of the support member 3 to be mounted, it is possible to assemble without making a mistake in the position in the left-right direction or the front-back direction, which is a good case.

[0009]

[Action]

 In this structure, the support member 3 is inserted into the bracket 2 and the bracket 2 is locked and fixed between the flange 5a and the engaging projection 6a. Similar to the seed support mechanism, the bracket 2 has a polygonal shape, and the holder portion 5 of the support member 3 abuts against the inner wall surface of the polygonal bracket 2 to prevent rotation. Since 7 is formed and they are in close contact with each other, the support member 3 is surely prevented from rotating in the bracket 2, and abnormal noise due to rattling is also reliably prevented. It will be. Further, since the bracket 2 has a polygonal shape, it can be welded to the seat back frame with a special shape for securing welding white, and can be extremely easily performed without using a connecting member. The workability will be demonstrated. Further, when the pair of left and right brackets 2, 2 have different outer shapes, the direction of the support member 3 when mounting it to the bracket 2 is correct without being confused in the left or right direction or the front-back direction. And, the work can be done quickly. When the headrest stay is inserted into the stay insertion hole 4 of the support member 3 fixedly mounted as described above and the headrest is supported, rattling does not occur in the headrest and a comfortable feeling of use can be obtained. Becomes

[0010]

[Effect of the device]

 As is clear from the above description, even though the present invention has a simple structure, the support member can be prevented from rotating in the bracket, and rattling and abnormal noise can be reliably prevented. It does not require a stopper mechanism for rotation prevention, a special connecting member for welding, etc., and the assembly work can be easily performed with an extremely simple structure. Therefore, the present invention has an extremely large practical value as a headrest stay support mechanism that eliminates the conventional problems.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of an essential part showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing the relationship between the tubular bracket and the holder portion in the embodiment of the present invention.

FIG. 4 is a sectional view of another embodiment showing the relationship between the tubular bracket and the holder portion.

FIG. 5 is a sectional view of another embodiment showing the relationship between the tubular bracket and the holder portion.

FIG. 6 is a perspective view of a main part showing an embodiment of a seat back frame in which left and right tubular brackets are different.

FIG. 7 is a perspective view of a main part showing another embodiment of the seat back frame in which the left and right tubular brackets are different.

[Explanation of symbols]

 1 Seat back frame 2 Cylindrical bracket 3 Support member 5 Holder part 7 Contact surface

Claims (1)

[Scope of utility model registration request] 1. A headrest stay support mechanism in which a support member (3) is mounted in a tubular bracket (2) fixed to a seat back frame (1) and a headrest stay is inserted and held therein. While making the tubular bracket (2) polygonal, a plurality of abutment surfaces (around the holder member (5) of the support member (3) that contact the inner wall surface of the tubular bracket (2) to prevent rotation ( 7) A support mechanism for a headrest stay, which is characterized in that