JPH06245844A - Headrest device for vehicle seat - Google Patents

Abstract

PURPOSE:To compose a headrest easily of the minimum number of components, and to remarkably minimize deformation of the headrest by strengthening the supporting state of the headrest without reinforcing a seat frame. CONSTITUTION:A headrest stay 27 is supported on the side of the upper frame 12a of a wire frame 12 of a seat back. A hook portion 41 for hooking the upper frame 12a is formed in a vehicle body frame 17 on which the seat back is to be mounted. In the vehicle body frame 17 positioned below the hook portion 41, a bracket 43 for receiving the stay is formed. The headrest stay 27 projecting downward from a lower part of a holder bracket 34 is inserted into and hooked on the stay receiving bracket 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat headrest device, and more specifically, a seatback seat frame is formed of a wire frame, and a support plate is fixed to an upper frame of the wire frame. The holder bracket is attached to the support plate, the stay holder is attached to the holder bracket,
A headrest device for a vehicle seat in which a headrest stay of a headrest is inserted and held in the stay holder.

[0002]

2. Description of the Related Art Generally, a vehicle seat or the like keeps a seated person stable while the vehicle is running, gives a proper sitting comfort, and fatigues the seated person for a long time. Therefore, it is desired to reduce as much as possible, and therefore various support devices are attached to each part of the seat. As such a support device, there is a headrest attached to the upper end of the seat back so as to support the back side of the head of the seated person.

Various types of headrests have been conventionally known as such a headrest. Generally, as a means for attaching the headrest stay to the upper frame of the seat back, a holder bracket is fixed to the upper frame,
The holder bracket is made to support the stay holder, and the headrest stay of the headrest is inserted and held in the stay holder.

Further, in recent years, in this type of vehicle seat, for the purpose of improving productivity and reducing weight, a seat frame is formed of a wire frame, and a pad material is integrally foam-molded integrally with the wire frame. Method is being adopted.

As a means for attaching the headrest to the seat frame formed of the wire frame, a support plate is fixed to the back side of the upper frame of the seat back, and a mounting plate is fixed to the support plate from the back side of the seat back. Then, a head bracket for a vehicle seat is provided which holds a holder bracket between the support plate and the mounting plate and attaches a stay holder to the holder bracket (Japanese Utility Model Publication No. 3-363).
No. 06 publication) has been proposed.

[0006]

However, in the headrest device having the conventional structure disclosed in Japanese Utility Model Publication No. 3-36306, a wire frame having a sufficient strength must be used, and a reinforcing material is used. In this case, the cost will increase, and if the rigidity and strength are insufficient, the support state of the headrest will be weakened.In such a case, the wire frame and headrest will be deformed, and the headrest centering around the stay holder will be used. Had a risk of rotating.

An object of the present invention is to simply construct the necessary minimum number of constituent parts, and to strengthen the support state of the headrest without reinforcing the frame of the seatback, and to strengthen the headrest. The present invention provides a headrest device for a vehicle seat, which can significantly reduce the deformation of the headrest even when a load is applied, and which is extremely safe.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a vehicle seat headrest device according to the present invention has a seat back seat frame formed of a wire frame. A vehicle seat in which a support plate is fixed to an upper frame of the vehicle, a holder bracket is attached to the support plate, a stay holder is attached to the holder bracket, and a headrest stay of a headrest is inserted and held in the stay holder. In the above headrest device, a hook portion that locks an upper frame of the wire frame is formed on a vehicle body frame below a vehicle body parcel to which the seat back is attached, and a stay receiving bracket is formed on the vehicle body frame located below the hook portion. And receive the staying bracket Headrest stay which projects from the lower portion of the stay holder downward, characterized in that it is inserted into.

[0009]

According to the present invention, the hook portion for locking the upper frame of the wire frame of the seat back is formed in the vehicle body frame below the vehicle body parcel to which the seat back is attached, and the vehicle body frame located below the hook portion is formed. Since the stay receiving bracket is formed and the headrest stay protruding downward from the lower portion of the stay holder is inserted into the stay receiving bracket, when a load is applied to the headrest in the rear direction, the hook portion is attached to the hook portion. The headrest stay tries to rotate in the same way as the turning force is applied to the headrest around the upper frame of the locked wire frame, but the headrest stay protruding below the lower part of the stay holder is locked to the stay receiving bracket. The rotation of the headrest is restricted and the load is transmitted to the body frame side. It can be.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle seat headrest device according to the present invention will now be described in detail with reference to the drawings. 1 to 3 respectively show an outline of one embodiment of a headrest device for a vehicle seat according to the present invention. A seatback 11 of a vehicle seat has a wire frame 12 having a frame structure, and this wireframe. The pad material 13 is integrally foam-molded on the outer periphery of the pad 12, and the skin material 14 that covers the outer periphery of the pad material 13.

In the embodiment shown in FIG. 2, the seat back 11 has a pair of left and right seating portions, and an armrest is attached to a frame 15 extending vertically in the center. A vehicle body frame 17 such as a vehicle body parcel is located behind the seat back 11. Although a detailed description of the frame line configuration of the wire frame 12 is omitted,
A conventionally known frame line configuration can be applied, and the seat back 11 may not have a pair of left and right seating portions.

The headrest device 21 includes a headrest main body 22 and a headrest stay 27 that hangs downward from a headrest frame 23 of the headrest main body 22.
It has and. The headrest body 22 includes a headrest frame 23, a pad material 24 arranged on the outer periphery of the headrest frame 23, and the pad material 24.
Is formed of a skin material 25 that covers the outer periphery of the.

In the present embodiment, the headrest stays 27 are formed as a pair of left and right heads, or an inverted U-shaped headrest stay is used, but a single headrest stay may be used. The pad material 13 of the seat back 11 and the pad material 24 of the headrest main body 22 are not limited to those integrally foamed.

A pair of recesses 32 having an arcuate cross section are formed at positions corresponding to the distance between the pair of headrest stays 27, and a support plate 31 formed long in the lateral direction is a wire having a frame line structure of the seat back 11. Frame 1
The second upper frame 12a is fixed to the front side.

A holder bracket 34 is attached to the pair of recesses 32 of the support plate 31. A stay holder (not shown) is attached to the holder bracket 34, and the headrest stay 27 of the headrest 21 is inserted and held in the stay holder.

As shown in FIGS. 1 and 2, the seat back 1
A hook portion 41 is formed on the lower body frame 17 such as the vehicle body parcel facing the upper frame 12a of the first wire frame 12. The upper frame 12a of the wire frame 12 is rotatably locked to the hook portion 41.

A stay receiving bracket 43 is formed on the vehicle body frame 17 located below the hook portion 41. The stay receiving bracket 43 is formed in a trapezoidal shape when viewed from the side, and the fixing portions 45 for fixing to the vehicle body frame 17 are formed at both ends of the stay receiving bracket 43.

In this embodiment, as the hook portion 41 and the stay receiving bracket 43, separate hook-shaped and trapezoid-shaped members are fixed to the vehicle body frame 17, but the vehicle body frame 17 is often made of metal. Therefore, the hook portion 41 and the stay receiving bracket 43 can be formed by cutting and raising the body frame 17.

The lower end side of the headrest stay 27 protruding downward from the lower portion of the holder bracket 34 is inserted into the stay receiving bracket 43. Headrest stay 27 inserted in the stay receiving bracket 43
The lower end side of is inserted into the stay receiving bracket 43, but is not in a normal contact state.

When a comparatively light load is applied to the headrest 21 in the rearward direction, the headrest stay 2
A load is applied to the upper frame 12a of the seat frame 12 via the head frame 21, and as shown in FIG. 3, the headrest 21 is supported by the upper frame 12a of the seat frame 12 and the support plate 31 in the case of a normal light load. Is in a state.

Further, as shown in FIG. 4, when a rearward impact load F is applied to the headrest 21, the headrest is centered on the upper frame 12a of the wire frame 12 locked to the hook portion 41. The turning power is applied to 21, and the headrest stay 27 is applied with the turning power.

Although the headrest stay 27 is about to rotate, the holder bracket 34, that is, the lower portion of the headrest stay 27 protruding downward from the lower portion of the stay holder is locked by the stay receiving bracket 43, and the headrest 21.
Is restricted. The turning force can be transmitted from the stay receiving bracket 43 to the vehicle body frame 17 side as a load, and further deformation of the headrest 21 is prevented.

The present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part of the headrest 21, the seat back 11, etc. can be freely modified or changed as necessary.

[0024]

The structure of one embodiment of the headrest device for a vehicle seat according to the present invention has been described above. According to this structure, the seatback is mounted on the vehicle body frame below the vehicle body parcel to which the seatback is attached. A hook portion for locking the upper frame of the wire frame is formed, a stay receiving bracket is formed on the vehicle body frame located below the hook portion, and the stay receiving bracket has a headrest stay protruding below the lower portion of the stay holder. Therefore, when a load is applied to the headrest in the backward direction, rotational force is applied to the headrest centering on the upper frame of the wire frame locked by the hook portion, and the headrest stay is similar. The headrest stay protruding downward from the bottom of the stay holder, It is locked to the receiving bracket, the rotation of the headrest is regulated, the load can be transmitted to the body frame side, it can be easily configured with the minimum necessary number of components, and the frame of the seat back is reinforced. Without needing to do so, the support state of the headrest can be strengthened, and even when a strong load is applied to the headrest, the deformation of the headrest can be significantly reduced,
It is possible to obtain a headrest device for a vehicle seat that is extremely safe.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of a headrest device according to the present invention.

FIG. 2 is a perspective view showing a seat back and a vehicle body frame to which the headrest device according to the present invention is applied.

FIG. 3 is a side sectional view of a headrest device according to the present invention.

FIG. 4 is a side view showing an operating state of the headrest device according to the present invention when an impact load is applied.

[Explanation of symbols]

 11 seat back 12 seat frame 13 pad material 14 skin material 15 frame 17 vehicle body frame 21 headrest 22 headrest body 23 headrest frame 24 pad material 25 skin material 27 headrest stay 31 support plate 32 recess 34 holder bracket 41 hook portion 43 stay receiving bracket 45 Fixed part

Claims (1)

[Claims] 1. A seat back seat frame is formed of a wire frame, a support plate is fixed to an upper frame of the wire frame, a holder bracket is attached to the support plate, and a stay holder is attached to the holder bracket. A headrest device for a vehicle seat, in which a headrest stay of a headrest is inserted and held in the stay holder, a hook for locking an upper frame of the wire frame to a vehicle body frame below a vehicle body parcel to which the seat back is attached. And a stay receiving bracket is formed on the vehicle body frame below the hook portion, and a headrest stay protruding below the lower portion of the stay holder is inserted into the stay receiving bracket. Sheet Headrest device.