JPH0542777Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a headrest device in which a headrest body is tiltably supported on a seat bag via a stay.

"Prior Art" As a conventional headrest device, for example, there is one disclosed in Japanese Patent Publication No. 57-45.

That is, a support socket formed into a triangular cross section by two members is attached to the headrest main body, and the stay is supported by the support socket so as to be relatively tiltable while being sandwiched with a predetermined surface pressure.
When adjusting the inclination angle of the headrest body,
The headrest main body is tilted against frictional force by the surface pressure between the support socket and the stay.

``Problem to be solved by the invention'' However, in such conventional headrest devices, after the bearing socket is attached to the headrest body, the shape of the bearing socket is changed to adjust the surface pressure between the bearing socket and the stay. Therefore, it is necessary to suppress variations in the shape of the bearing socket as much as possible during molding so that the frictional force is not too small or too large, which causes the problem of increasing costs.

The present invention was developed by focusing on these conventional problems, and it is based on the premise that there will be some variation in the shape of the clamping brackets that support the stays. It is an object of the present invention to provide a headrest device which has a configuration in which the force can be adjusted, has a large tolerance in the shape of a clamping bracket, is easy to mold, and can reduce costs.

"Means for Solving the Problems" The gist of the present invention for achieving the above object is that: in a head restraint device comprising a head restraint main body tiltably supported on a seat bag via a stay, the stay is fitted inside the head restraint device; a corner portion having a substantially U-shaped cross section with an opening opened in a predetermined direction; a pair of flange portions extending substantially parallel to each other from the opening portion of the corner portion; A clamping bracket is formed of a flat plate of spring material and has an abutting part formed by bending at a right angle and whose tip abuts on the other surface, and the bracket is configured to sandwich and support the stay at the corner part so that the surface pressure can be adjusted. In order to adjust the gap between the corner openings, the clamping bracket is attached to the headrest main body in a state where the interval between the flanges can be adjusted, and the bolts for tightening are passed through the flanges and the nuts are screwed. The headrest device is characterized in that the abutment portion abuts the surface of the other flange portion and the two flange portions are arranged substantially parallel to each other when the two flange portions are brought together.

``Function'' The stay is attached to the headrest main body via a clamping bracket, and when both flanges are tightened with tightening bolts and nuts, the contact part hits the surface of the other flange and both The flange portions are substantially parallel, the corner portions sandwich the stay in a stable posture, and the stay is supported by being sandwiched between the corner portions with a predetermined surface pressure.

To adjust the tilt angle of the headrest body,
What is necessary is to relatively tilt the stay against the frictional force due to the surface pressure from the corner portion of the clamping bracket.

If the frictional force is too large and the stays do not tilt relative to each other easily, loosen the nuts and bolts a little relative to each other and widen the gap between the flanges of the clamping bracket to reduce the gap between the openings. spreads, which reduces the surface pressure from the corners,
The frictional force can be reduced to an appropriate value.

On the other hand, if the frictional force is too small and the stay will tilt relative to each other with a small force, the gap between the opening parts will be narrowed by making the gap between the flanges of the clamping bracket narrower. As a result, the surface pressure from the corner increases, and the frictional force can be increased to an appropriate value.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

1 to 3 show an embodiment of the present invention.

As shown in FIGS. 1 and 2, a headrest main body 10 which is a frame of a headrest 10a
A stay 20 is attached to the bracket 30 via a clamping bracket 30. The headrest main body 10 has a front part 12 with an opening 11 for insertion, and a rear part 1.
3. It is composed of a top surface part 14 and a bottom surface part 15, and is formed into a single panel with a substantially C-shaped cross section. The insertion opening 11 is inserted into the headrest main body 1 when the stay 20 and the clamping bracket 30 are combined.
The size is such that it can be inserted inside the 0.

The stay 20 has leg portions 22, 22 suspended from both ends of a substantially horizontal body portion 21 along the inside of the bottom surface portion 15 of the headrest main body 10. Bottom part 1
5 is provided with a long hole 16 for penetrating the stay so as not to interfere when the stay 20 is tilted relative to each other.

As shown in FIGS. 2 and 3, the clamping bracket 30 has a corner portion 32 formed in a substantially U-shaped cross section with an opening portion 31 that opens rearward.
A bead 32a is formed at the front portion of the corner portion 32 on the opposite side to the opening portion 31 and projects forward.

An upper flange portion 33 and a lower flange portion 34, which are substantially parallel to each other, extend rearward from the opening portion 31, respectively. The tip of the upper flange portion 33 is bent downward to form an abutment portion 35 that abuts the lower flange 34.

A seat portion 17 is formed on the bottom surface portion 15 of the headrest main body 10 on which a lower flange portion 34 of a clamping bracket 30 is placed.

A bolt 1 for tightening is attached to the seat part 17 of the bottom part 15.
8 is implanted, the threaded part 18a extends into the inside of the headrest main body 10 and passes through the upper flange 33 and lower flange part 34 of the clamping bracket 30, and the head 18b of the bolt 18 for tightening is inserted into the bottom part 1.
It only slightly protrudes to the outside of the seat portion 17 of No. 5.

The substantially horizontal body part 21 of the stay 20 is fitted into the corner part 32 of the clamping bracket 30, and the gap between the opening part 31 is designed to hold the substantially horizontal body part 21 by the corner part 32 with an appropriate surface pressure. Push down the upper flange part 33 to adjust the upper flange part 3.
A nut 19 that can adjust the distance between the lower flange portion 34 and the lower flange portion 34 is screwed onto the threaded portion 18a of the bolt 18 for tightening. Top part 1 of headrest main body 10
4 has a working hole 19a through which a tool for turning the nut 19 is inserted.

Next, the effect will be explained.

In FIG. 3, the stay 20 is attached to the headrest main body 10 via a clamping bracket 30.

That is, the lower flange portion 34 of the clamping bracket 30 is placed on the seat portion 17 of the bottom portion 15, and the threaded portion 18a of the tightening bolt 18 implanted in the seat portion 17 is attached to the upper flange portion 33 and the lower flange portion. Part 3
4, the nut 19 is screwed into the threaded portion 18a, and the nut 19 hits the upper flange portion 33.
The abutting portion 35 of the upper flange portion 33 also contacts the lower flange portion 3.
I am in a state of hitting 4.

In this state, the upper flange portion 33 is pushed down by the nut 19 against its restoring force.
The center portion of the upper flange portion 33 is slightly curved downward, and as a result, the corner portion 32 is drawn toward the upper flange portion 33, and as a result, the gap between the opening portion 31 of the corner portion 32 is caught, and the corner portion 32 is The stay 20 is supported by the surface pressure generated by sandwiching the substantially horizontal body portion 21 of the stay 20.

The headrest main body 10 is attached to a seat bag (not shown) via the stay 20, and the headrest main body 1
In order to adjust the inclination angle of 0, the stay 20 may be relatively tilted by resisting the frictional force due to the surface pressure between the stay 20 and the corner portion 32 of the clamping bracket 30.

If the contact pressure between the stay 20 and the corner portion 32 of the clamping bracket 30 is high, and therefore the frictional force becomes large, and the stay 20 does not tilt relative to each other unless a very large force is used, the tool Loosen the nut 19, widen the gap between the upper flange part 33 and the lower flange part 34, and widen the gap between the opening parts 31 to lower the surface pressure between the stay 20 and the corner part 32 of the clamping bracket 30. .

On the contrary, the stay 20 and the clamping bracket 30
If the contact pressure between the stay 20 and the corner part 32 is low and the stay 20 easily tilts relative to the corner part 32, tighten the nut 19 further with a tool and tighten the upper flange part 33 and the lower flange part 34. and the stay 20 with a gap between the opening 31 and
It is sufficient to increase the surface pressure between the corner portion 32 of the clamping bracket 30 and the corner portion 32 of the clamping bracket 30.

In the headrest device according to the embodiment, when the upper flange portion 33 is pushed down with the nut 19 in order to adjust the surface pressure, both sides are maintained at a predetermined height by the opening portion 31 and the contact portion 35, and the upper Since the center portion of the flange portion 33 is pushed down while maintaining a substantially horizontal state, the upper flange portion 33 can be effectively pushed down by the nut 19, and the gap between the opening portions 31 can be adjusted to appropriately adjust the surface pressure. .

"Effects of the invention" According to the head rest device of the invention, even if there is some variation in the shape of the corner and flange parts in the clamping bracket that supports the stay on both sides, the distance between the two flange parts can be adjusted. By doing this, the contact pressure between the corner part and the stay is adjusted and the stay is supported with an appropriate contact pressure, so the tolerance of the shape of the clamping bracket can be increased, making it easier to mold and reducing costs. can be reduced. Since the abutting portion abuts the surface of the other flange portion and the two flange portions are substantially parallel, the corner portion holds the stay in a stable posture, and the surface pressure can be adjusted stably and easily.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is an overall perspective view of the headrest device, FIG. 2 is a perspective view of the main parts, and FIG. FIG. 10... Head rest main body, 11... Opening for insertion, 15... Bottom part, 20... Stay, 30,
40...Bracket for clamping, 31...Opening part,
32...Corner part, 33, 43...Upper flange part, 34...Lower flange part.

Claims (1)

[Claims for Utility Model Registration] A head restraint device comprising a head restraint main body tiltably supported by a seat bag via a stay, which has a generally U-shaped cross section with an opening portion into which the stay fits and opens in a predetermined direction. a corner portion, a pair of flange portions extending substantially parallel to each other from an opening of the corner portion, and an abutment portion formed by bending the tip of one of the flange portions at a substantially right angle and having the tip abutting the other surface. A clamping bracket is formed of a flat plate made of spring material, and in order to adjust the gap between the openings of the corner parts so that the stay can be sandwiched and supported at the corner parts with adjustable surface pressure, When the clamping bracket is attached to the head rest main body with the interval adjustable, and the tightening bolts are passed through both flanges and nuts are screwed together, the abutting portion will come into contact with the surface of the other flange. A headrest device characterized in that both flanges are arranged so that they are substantially parallel.