JPS6048710A - Headrest apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a headrest device for a vehicle seat or the like.

For example, in a headrest device used for a conventional vehicle seat, etc., as shown in FIG. Angle θ around rotation center a until position
There are some types that allow you to adjust the tilt to any position within.

However, in such a conventional headrest device, when the headrest (1) is tilted to reduce the distance between the headrest (l) and the seated person's head from 21 to 82, the contact between the headrest (11) and the head The part is from width Ll to width L
2, resulting in a so-called line-hitting condition, which has the disadvantage that the seated person cannot obtain a good feeling of support from the headrest txt.

In view of the above-mentioned points, the present invention allows the width of the contact area between the headrest and the head to remain unchanged even if the headrest is moved and adjusted, so that the seated person can obtain a good feeling of support from the headrest. The purpose is to

For this reason, the headrest device of the present invention includes a main frame pivotally connected to a headrest stay mounted and supported on a vehicle seat, a sub-frame pivotally connected to the front side of this main frame, and a forward tilting of this main frame. A link mechanism that swings to push the subframe forward in conjunction with movement automatically adjusts so that the width of the contact area between the headrest and the head does not change as the headrest moves. An embodiment of the headrest device of the present invention, which is characterized by the above features, will be described with reference to FIGS. 2 to 6.

Figure 2 shows the headrest device (1) attached to a vehicle seat (2).
) is shown from the side when installed. This headrest device (1) is equipped with a main frame (41) and a sub-frame (51) inside the exterior (3), as shown in a partially sectional perspective view in FIG.

The main frame (4) and sub-frame (5) are constructed by attaching members as shown in FIGS. 4 and 5. That is, a rectangular opening (6) is provided in the front face of a main frame (4) having a substantially triangular cross section, and a pair of shaft supports each having a shaft hole (9) bent inward from both sides of the opening (6). f71 (81 is installed protrudingly.

In addition, the curved plate-shaped sub-frame (51) has a round shaft hole (12a
) and a pair of shaft mounting parts (121 (
121 is provided to protrude downward from the upper part of the inside of the sub-frame (5). Then, convert the sub frame (5) to the main frame (
41 and attach it to the front of the sub frame (5).
1 ([2+ matches the shaft supports (71+71) on both sides of the opening (6) in the main frame (4), and insert the shaft pin αα into the round shaft hole (12a) of the shaft mounting part α2 and the shaft support (7
), and the sub frame (5) is pivotally attached to the main frame (4) so as to be able to swing freely.

The long plate-shaped headrest stay 031 for supporting the main frame (4) and the sub-frame (5) has shaft rods (14
a) Attach the shaft member side on which (14a) is formed to the pins (1, 51 (
Fixed at 151. In addition, the upper end is formed into a U-shape, and the shaft pins (161 (I [il)
(17+) is fixed by means such as welding.Then, this headrest stay Q3i is attached to the first
Fit collars 〇81a81 made of synthetic resin etc. to the shaft rods (14a) (14a) of the fixed shaft portion A, respectively, and insert the collars into the interior through the bottom opening of the main frame (41). Two fixing recesses Q, 91 (round hole drilled at the bottom of 19) (2111 (21 has a fixing screw (211
(Through 2D, screw into the screw holes c!a of each color 〇δα& to constitute the first fixed shaft part A, and headrest stay (
13, the main frame (
4) is pivotally connected to the swing Bf function while maintaining the required frictional resistance.

A pair of arms @c131 for swinging the sub-frame (5) in conjunction with the movement of the headrest stay 03 and the main frame (4) have a substantially inverted V-shape as a whole, and each has a tip. The shaft pin (to) is provided to protrude laterally outward from the side. Further, a shaft hole (C) is formed in the bent part of the arm (to), and a long groove shaft hole (2) is further formed in the lower end. Then, insert the shaft hole (c) of this arm (2) into the main shaft
- The rivet (5) is pivoted in alignment with the shaft hole (9) of the shaft support (8) of the arm (41) to constitute a second fixed shaft portion B, and the arm (c) is attached to the second fixed shaft portion B. Main frame centered around (
4) Pivotally attached for free swinging. Furthermore, this arm (
c) The shaft pin (to) is connected to the long groove shaft hole αB of the sub frame (5).
and insert the shaft pin 4 of the headrest stay 031 into the long groove shaft hole (C) of the arm (C).

Then, an exterior (31) is attached to the main frame (4) and the sub-frame (5) as shown in FIG.
31 is constructed by arranging wadding 4 on the outside of the headrest pad and covering it with the outer skin side. Furthermore, in the headrest of this example, since the part of the sub-frame (5) is raised, the elastic waping 01 is attached to the tip of the upper exterior part (so-called front section) of the sub-frame (5). ) and hog ring the tip (3
This is to prevent the exterior from becoming stretched when the sub-frame (5) is raised. In addition, in order to prevent the waving C11l portion at the bottom of the headrest from becoming unsightly when the subframe (5) is in normal condition or when it is swollen, an undercover (
C) is made larger and covers the lower part of the headrest to improve its appearance.

Next, the operation of the headrest device configured as described above will be explained. In the headrest device of this example, the headrest (1) is manually moved over an angle θ from the position shown by the solid line in FIG. 2 to the position shown by the dashed line. Adjust tilt.

That is, this has the same effect as when the headrest stay 03, which is located at the position indicated by the solid line in FIG. 4, swings around the first fixed shaft member to the position indicated by the two-dot chain line. Then, this headrest stay (13 shaft pins (61 is the arm (c) while moving inside the long groove shaft hole of the arm (c)
is rotated around the second fixed shaft part B. Along with this, the shaft pin C21 of the arm (c) moves in the long groove shaft hole 1 of the sub frame (51) and swings the sub frame (5) relative to the main frame (4) about its shaft pin 00. Move to raise the front green area of the exterior (3).

In this way, when the headrest device of this example (in 11, the front green part of the headrest is raised as shown by the double-dashed line cap in Figure 2) and the distance from the seated person's head is narrowed to 23. However, the width of the contact area between the headrest (1) and the head remains the same.

Next, another embodiment of the headrest device of the present invention will be described with reference to FIG.

In this embodiment, a four-bar chain mechanism is used as a link mechanism for swinging the sub-frame (5) in response to the movement of the main frame (4).

For this reason, in this embodiment, a first fixed shaft part A is formed on the upper part of the headrest stay 03 that is mounted and supported on a vehicle seat, etc. Holds resistance and is pivotally mounted for swinging.

In addition, a support rod (4α) is provided laterally from the top of the headrest stay α (a shaft attachment portion 0υ is provided, and one end of the arm @ is pivotally attached to the upper part of the front side of the main frame (4). Connect the upper pivot part +43 of the sub frame (5) to the axis pin +4
Attach the shaft with 3. In this embodiment, the pivot portion of the shaft pin (42!) constitutes the second fixed shaft portion B.

Also, from the pivot joint (43) of the sub frame (5) to the support rod (4)
4) is provided in a protruding manner, and a shaft attachment portion (45) is also provided at the free end of the support rod (44) to pivotally attach the other end of the arm (C). In this way, a four-bar chain mechanism is constructed. In addition,
The configuration of the headrest device of this embodiment other than the above is as follows:
Since this embodiment is the same as the embodiment shown in FIGS. 2 to 6 described above, the explanation thereof will be omitted.

To explain the operation of the headrest device of the present embodiment configured in this way, when the headrest (1) is manually adjusted to tilt forward, the headrest stay α□□□ located at the position of the solid line in FIG. This has the same effect as swinging around the first fixed shaft portion A to the position shown by the dotted chain line. Then, as shown by the dashed line in the figure, the support rod of the headrest stay (the support rod 04 of the sub-frame when the arm is pulled down) is rotated downward about the second fixed shaft portion B. This causes the sub frame (5) to swing forward.
The operation is similar to that of the embodiment shown in FIGS. 2 to 6 described above.

As detailed above, in the headrest device of the present invention, when adjusting the movement of the headrest, the sub-frame swings in conjunction with the swinging motion of the main frame, even if the distance from the seated person's head changes. Since the width of the contact area between the headrest and the head does not change, the seated person has the effect of being able to obtain a good feeling of support from the headrest.

Furthermore, since the present invention is constructed using a simple link mechanism, the number of parts is reduced compared to a structure in which the headrest is moved parallel to the headrest stay and the same effect as the present invention is obtained. Therefore, the weight of the headrest device can be reduced (as well as its cost and wear).

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional headrest device, FIG. 2 is an explanatory diagram showing an example of the headrest device of the present invention, FIG. 3 is a partially sectional perspective view showing the headrest device part shown in FIG. Fig. 4 is an explanatory diagram of the mechanical part of the headrest device shown in Fig. 2, Fig. 5 is an exploded perspective view of the headrest device shown in Fig. 2, and Fig. 6 is an enlarged side view of a part of the headrest device shown in Fig. 2. 7 are explanatory diagrams of a mechanism section showing another example of the headrest device of the present invention. In the figure, m is the headrest, (4) is the main frame, (5)
is the sub-frame, (131 is the headrest stay, 1
23) is an arm. Figure 7-47-1

Claims (1)

[Claims] A main frame pivotally connected to a headrest stay mounted and supported on a vehicle seat, etc., a sub-frame pivotally connected to the front side of the main frame, and the sub-frame tilting forward in conjunction with the forward tilting movement of the main frame. A headrest device characterized by comprising a link mechanism that swings so as to push it forward.