JPH0531977Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a support structure for a headrest stay. To explain in more detail, it includes a bracket fixed to the upper horizontal rod of a seatback frame, and a support structure attached to the bracket. The present invention relates to a support structure for a headrest stay, which includes a stay holder having a through hole into which the headrest stay is inserted.

[Conventional technology]

BACKGROUND OF THE INVENTION Headrests have conventionally been attached to seatbacks and are used to protect the occupant's head and provide rest. A stay supporting the headrest is inserted and attached to a through hole of a headrest stay holder attached to the seat back frame side. As shown in FIG. 5, when the stay 1 of this headrest is in complete contact with the through hole 3 of the stay holder 2, the frictional resistance is large when the stay 1 moves up and down, the operating force becomes heavy, and the gap is closed. When formed, it has the disadvantage of causing looseness.

In particular, when using a pair of left and right stays 1 and a pair of left and right stay holders 2, only one of the pair of left and right stay holders 2 is provided with a locking mechanism, and the other is in a free state, so this free side The stay holder 2 was often rattled.

For this purpose, a protrusion 5 made of synthetic resin or the like is formed in the vertical direction on the inner peripheral surface of the through hole 3 of the stay holder 2,
A stay holder 2 is known in which the contact surface between the stay holder 2 and the stay 1 is reduced to reduce frictional resistance.

[The problem that the idea aims to solve]

However, even in the conventional stay holder 2,
If the stay 1 and the protrusion 5 are brought into close contact, the stay 1
The operating force required to move the vertical position of the machine becomes heavy,
In addition, gaps are generated due to wear and deformation of the protrusions 5, which causes rattling and abnormal noise when the headrest receives a load in the front-rear direction.

The purpose of this invention is to create a head rest that has low frictional resistance when moving the stay up and down, reducing the operating force, and eliminating rattling between the stay and the stay holder and preventing the generation of abnormal noise. It provides a support structure for the stay.

[Means to solve the problem]

The present invention was made in view of the above-mentioned problems, and includes a bracket fixed to the upper horizontal rod of the seatback frame, and a stay holder attached to the bracket and having a through hole into which the head rest stay is inserted. In the support structure for a head rest stay, the stay holder is made of an elastic synthetic resin material, and the stay holder has a flange provided at an upper part, and extends downward from the flange, and the outer diameter gradually decreases downward. a tapered portion, the tapered portion being inserted into the bracket;
The present invention is characterized in that an elastic body having a tensile force is provided between the flange portion and the bracket.

[Effect]

According to the present invention, a stay holder made of an elastic synthetic resin material is attached to a bracket fixed to the upper horizontal rod of the seatback frame, and this stay holder is installed at the upper flange and extends below the flange. The tapered part of the stay holder is inserted into the bracket, and the tapered part of the stay holder is tightened by the tensile force of the elastic body provided between the flange part and the bracket. Since it is brought into pressure contact with the bracket, both the outer surface of the tapered part and the through hole are elastically deformed, and the outer surface is in close contact with the bracket, and the through hole is in close contact with the headrest stay, so that the relationship between the bracket and the stay holder and between the stay holder and the head rest stay is There is no backlash between the parts, and no backlash or abnormal noise occurs.

In addition, when the head rest stay is moved up and down, if the stay holder is moved upward against the tensile force of the elastic body, a gap is created between the head rest stay and the through hole of the stay holder, reducing frictional resistance and operation. It is possible to reduce the force.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a support structure for a headrest stay according to the present invention will be described in detail below with reference to the drawings.

1 to 3 schematically show an embodiment of the present invention, in which an upper horizontal rod 12a which is a part of the seat back frame 12 of the seat back 11 is shown.
A cylindrical bracket 13 is fixed to the bracket 13, and a stay holder 14 is attached to the through hole 13a of the bracket 13. That is, as shown in FIG. 2, the stay holder 14 is made of a synthetic resin material having appropriate elasticity, and includes an upper flange portion 15 and a tapered portion extending below the flange portion 15, the outer diameter of which gradually decreases downward. 16 and a headrest 2 in the center.
A through hole 17 into which one stay 22 is inserted is provided.

Further, the tapered portion 16 of the stay holder 14 is inserted into the through hole 13a of the bracket 13, and a coiled spring 18 having a tensile force is attached between the lower surface of the flange portion 15 and the upper surface of the bracket 13. The upper end of the coil spring 18 is attached to the lower surface of the flange portion 15 and the lower end is attached to the upper surface of the bracket 13, and this tensile force causes the tapered portion 16 of the stay holder 14 to move into the through hole 1 of the bracket 13.
3a, the inner diameter of the through hole 17 of the stay holder 14 is elastically deformed and reduced.

Since the present embodiment is configured as described above, the flange portion 15 of the stay holder 14 is pulled by the tensile force of the coil spring 18, and a tapered portion extending below the flange portion 15 is formed as shown in FIG. 16 comes into pressure contact with the upper corner of the through hole 13a of the bracket 13, the stay holder 14 contracts inward, the inner diameter of the through hole 17 of the stay holder 14 contracts, and it comes into close contact with the head rest stay 22, so that the head rest stay 22 does not rattle and does not generate abnormal noise.

Further, as shown in FIG. 3, when the stay holder 14 is lifted in the direction of arrow a against the tensile force of the coiled spring 18, the taper portion 16 is released from the pressing force of the bracket 13, and the stay holder 14 is lifted up in the direction of arrow a. The inner diameter of the through hole 17 returns to its original diameter, creating a gap between the head rest stay 22 and the through hole 17, reducing the resistance when adjusting the vertical position of the head rest stay 22, and reducing the operating force. can do.

Next, another embodiment will be described with reference to FIG.

Bracket 23 attached to upper horizontal bar 12a
A flange portion 25 is provided on the upper portion of the flange portion 25, and a male thread 25a is provided on the outer peripheral surface of the flange portion 25. Also, a female thread 2 screwed into this male thread 25a
A cylindrical holder push-up member 24 is provided with a cylindrical holder push-up member 24 having
The upper end surface comes into contact with the lower surface of the flange portion 15 of the stay holder 14. Note that one or more operating pieces 24b are attached to the outer peripheral surface of this holder push-up member 24.

When the holder push-up member 24 configured as described above is rotated upward in the direction of arrow b via the operation piece 24b, the upper end surface of this holder push-up member 24 comes into contact with the lower surface of the flange portion 15 of the stay holder 14. While in contact with the coil spring 18, the stay holder 14
The stay holder 14 and the bracket 13 are lifted up against the tensile force of , and the stay holder 14 and the bracket 13 are separated from each other as shown in FIG. In addition, the holder push-up member 24
When the stay holder 14 and the bracket 13 are rotated in the opposite direction from the front and held in a lower position where the upper end surface of the holder push-up member 24 is separated from the lower surface of the flange portion 15, the stay holder 14 and the bracket 13 are brought into pressure contact as shown in FIG. , and the stay holder 14 and the stay 22 are in close contact with each other.

As explained above, by rotating the holder push-up member 24, the stay holder 14 is moved to the second position.
As shown in the figure, from a state where the stay holder 14 and the bracket 13 are in pressure contact or in contact with each other, as shown in FIG.
It can be adjusted in various ways to a state in which it is released from pressure, and it can be easily operated.

[Effect of idea]

The above is the configuration of an embodiment of the support structure for the head rest stay according to the present invention. According to this configuration, the stay holder is made of an elastic synthetic resin material, and the stay holder is connected to the upper flange portion and the flange portion. This taper part is inserted into the bracket, and the stay holder is moved by the tensile force of the elastic body provided between the flange part and the bracket. Since the tapered part of the bracket is pressed into contact with the bracket, the tapered part is elastically deformed and the outer surface is brought into close contact with the bracket, and the through hole is reduced and brought into close contact with the headrest stay. There is no gap between them, which prevents rattling and abnormal noise. Also,
When moving the vertical position of the headrest stay,
A gap can be formed between the head rest stay and the through hole of the stay holder, so that frictional resistance can be significantly reduced, and operating force can be reduced.

[Brief explanation of the drawing]

1 to 3 schematically show an embodiment of the headrest stay support structure according to the present invention, in which FIG. 1 is a perspective view of the seat back, and FIG. 2 shows the stay holder and the bracket pressed against each other. FIG. 3 is a vertical cross-sectional view showing the state in which the stay holder is released from the bracket, FIG. 4 is a vertical cross-sectional view of another embodiment provided with a holder push-up member, and FIG. 5 is a vertical cross-sectional view of a conventional stay holder. In the figure, 11... Seat back, 12... Seat back frame, 13, 23... Bracket, 1
4... Stay holder, 15... Flange part, 16
...Tapered portion, 17...Through hole, 18...Wrong spring (elastic member having tensile force).

Claims (1)

[Scope of utility model registration request] A headrest stay support structure comprising a bracket fixed to an upper horizontal rod of a seat back frame, and a stay holder attached to the bracket and having a through hole into which a headrest stay is inserted, wherein the stay holder has elasticity. The stay holder is made of a synthetic resin material, and includes a flange portion provided at an upper portion, and a tapered portion extending downward from the flange portion, the outer diameter of which gradually decreases downward, and the tapered portion is inserted into the bracket. A support structure for a headrest stay, characterized in that an elastic body having a tensile force is provided between the flange portion and the bracket.