JPH0614609Y2 - Vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vehicle seat, and more particularly to an improvement of a vehicle seat having an automatic adjustment mechanism capable of adjusting a headrest portion to an optimum tilt angle.

(Prior Art and Its Problems) Conventionally, it is generally known that a vehicle seat has a headrest part and a backrest part which are separate bodies, but there is no structure provided with a structure capable of automatically inclining the headrest part forward and backward. , And the like, for example, the actual exploitation Sho 63-58
There is a prior art described in Japanese Patent No. 46.

This does not have a structure in which the backrest part and the headrest part are not integrated and has a structure in which the headrest part is inclined forward and backward, but inside the headrest part, a plurality of airbags communicating with the air supply side are provided. A headrest is provided by arranging an elastic body formed by stacking the bodies in a continuous manner, and pressing the surface part corresponding to the headrest part from the inner surface side by the expansion and contraction of the elastic body in the stacking direction to appropriately expand only the surface. It was to adjust the optimum condition of the section.

However, it is preferable that the headrest portion has a concave portion, or at least a flat surface portion, which forms the head contact surface so that a human's occipital region can be widely fitted, but the surface corresponding to the headrest portion as in the above-mentioned prior art. If only the part is adjusted to swell, the head contact surface will protrude forward, and the head will come into contact with the protruding part with a small contact area during operation, resulting in an unstable condition. It left the problem of being there.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned problems of the above-described prior art.
Providing a vehicle seat that automatically adjusts by inclining the entire headrest part back and forth with respect to the backrest part by expanding and contracting the expandable body composed of multiple air bag bodies, without affecting the surface shape of the headrest part It is to be easy to use.

(Means for Solving the Problem) The technical means made by the present invention in order to achieve the above object is to provide a headrest portion with a main body for receiving the head of a user and a support plate provided on the lower surface of the main body. The support plate of the headrest portion is inserted into the backrest portion through the opening provided on the top surface of the backrest portion, and a required space is formed between the support plate and the stop portion provided in the backrest portion. The support plate is rotatably held at an arbitrary position on the backrest, and a plurality of inflatable and defensible air bag members are formed in the space by stacking them in a communicating manner so as to communicate with each other. That is, the body is arranged such that the air bag bodies at both ends thereof are in contact with the support plate and the stopper.

(Operation) When air is supplied to the expandable body by the above-mentioned technical means, the air bag bodies that are communicatively connected and that form the expandable body expand in accordance with the air supply amount, and the air bag bodies overlap each other. When it is extended to and the support plate of the headrest portion is pushed backward, the headrest portion main body is inclined forward and the air supply is stopped at the optimum position.

Further, when the back head of each person comes into contact with the main body of the headrest portion and a pressing force is applied to return the headrest portion to the rear, the supporting plate presses the elastic body by the pressing force to compress the air in the elastic body, so that the headrest portion main body moves backward. You can run away reasonably.

Then, when the air in the expandable body is discharged to contract the expandable body, the pressing force against the support plate of the headrest portion when the air bag body forming the expandable body is inflated is weakened, and the headrest portion main body tilts backward, which is optimal. Stop evacuation of air at the position.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the figure, (A) is a vehicle seat of the present invention, and the vehicle seat (A) is a seat portion (a) including a headrest portion (1), a backrest portion (2) and a seat portion (3), and an air pump. It is composed of an elastic body (4) which expands and contracts by supplying and discharging the air sent from (5).

The seat portion (a) is a frame (1) serving as a skeleton of the headrest portion (1), the backrest portion (2) and the seat portion (3).
01) ... are formed of steel plates, etc., and the respective frames (10
1) is covered with a cushion material (102) having a required thickness and a trim cover (103).

In the illustrated example, the headrest portion (1) and the backrest portion (2) are integrally covered with the trim cover (103), but they may be separately covered. Needless to say.

The headrest portion (1) is integrally fixed to the headrest portion main body (1a) formed by curving the occipital region contact surface (1a ') so as to naturally follow the occipital region and the lower end of the main body (1a). The support plate (1b) comprises a support plate (1b), a flat plate body (1b ') vertically extending from the lower end of the main body (1a), and a slight bending forward from its midway portion, and both sides. Edge (1b ″) (1
b ″) extends forward and both side edges (1b ″)
Axial holes (6) and (6) are bored on the same axis in the upper part of (1b ″).

The flat plate (1b ') may be formed by integrally extending the back plate of the main body (1a) and is not particularly limited.

The backrest part (2) is attached to the seat part (3) so as to be able to fall down, and the upper part (2a ') of the backrest part main body (2a) is communicated with the hollow interior (2b) to open the opening part (2a). 2c) is provided,
A case in which supporting portions (2d) and (2d) are projectingly provided on both end surfaces in the longitudinal direction of the opening (2c), and a portion facing the opening (2c) is opened in the hollow interior (2b) ( 2e) is fixed to the inner surface of the back plate (2f) of the backrest body (2a) with screws (not shown) or the like.

The opening (2c) and the case (2e) have a shape larger than the width of the side edge (1b ') of the support plate (1b) within the necessary rotatable range of the support plate (1b) of the headrest part (1). Shall be provided.

Then, the support plate (1b) of the headrest portion (1) is loosely inserted into the hollow inside (2b) through the opening (2c) of the backrest portion (2), and the upper surface (2a) of the backrest portion (2) is also inserted. ′) Supporting portions (2d) (2d) provided on the support plate (1b) and shaft holes (6) (6)
The headrest part (1) is rotatably held on the backrest part (2) and the front face of the support body (1b) by connecting and with the long shaft (7) and attaching the shaft. A required space (18) is formed between the inner surface (stop portion) (2e ′) of the front wall of the case (2e), and the expandable body (4) is arranged in the space (18).

The stopper portion (2e ′) is not limited to the above-mentioned one, and, for example, support legs are arranged in parallel from the back plate (2f) toward the front, and a plate body is provided between the support legs. Stop the body (2
e ′), or a front plate may be provided on the surface of the backrest portion (2) with respect to the back plate (2f), and the front plate may serve as the stop portion (2e ′), or the back plate (2f) ) As the stop (2e ′),
An expandable body (4) may be arranged between the headrest portion (1) and the rear surface of the support plate (1b). In this case, the support plate (1b) is pushed forward, Board (1b)
Need to have a mechanism that tilts the headrest body (1a) forward.

Further, an attracting spring (8) is stretched between the headrest portion (1) and the backrest portion (2), and the spring (8) always applies a force to the headrest portion (1) rearward. To do.

The attracting spring (8) is provided internally or covered with a trim cover (103) so as not to be exposed to the outside.

The seat portion (3) has a conventionally well-known shape, and a description thereof will be omitted.

The stretchable body (4) is formed by stacking a plurality of, for example, two air bag bodies (4a) formed by using the molding sheet (9) having a three-layer structure, and the central portion of the contact surface of the overlapping portion is Both air bag bodies (4a) and (4a) are integrally joined by heat welding, and both air bag bodies (4a) are provided in the area of the joint portion.
Ventilation hole (1) that connects the air chambers (4a ') and (4a') of (4a)
0) ... is established.

Explaining an example of the air bag body (4a), the air bag body (4a) is a thread having a thickness of 50 to 100 microns, which has both non-stretchability and high tension, such as polyester or polyamide. Number of meshes woven with thread 70 ~
200 cloth materials (9a) are sandwiched between two thermoplastic synthetic resin sheets (9b) and (9b) made of thermoplastic soft urethane resin, which is a little harder than ordinary ones. The sheets (9b) (9b) are heat-welded together over the entire surface, and the three members (9b) (9a) (9
A molding sheet (9) integrally molded with b) is cut into a required shape (in the illustrated example, a substantially rectangular shape), two molding sheets (9) are superposed, and their peripheral edges are heated. Weld and mold.

Further, the air chamber (4
Provide an air supply port (11) for letting air in and out of a ').

In addition, the above-mentioned forming sheet (9) should be prevented from being stretched by the cloth material (9a), and the meat pressure of the forming sheet (9) itself should be suppressed to such an extent that the flexibility of the sheet (9) is not impaired. You can

Further, the air bag body (4a) molded using this molding sheet (9) is less likely to be deformed when high pressure is applied to the air chamber (4a '), and wrinkles due to lack of flexibility during expansion. Is rarely generated.

Therefore, the air supply pipe (1) from the valve (14) arranged at the air supply port (11) from the air pump (5) through the air supply pipe (13).
3 ') is connected through a connecting pipe (15), and the air bag body (4a) on the connecting side is screwed (12) to the stopper (2e') of the case (2e).
The expansion / contraction body (4) is fixed to the support plate (1b) of the headrest portion (1) by being fixed.

Then, the operation button (17) provided on the valve (14) together with the operation switch (16) of the air pump (5) is set to the open position, and the air sent from the air pump (5) is sent to the air supply pipe (13). ′), The air is supplied from the air supply port (11), and the air is supplied to the air chamber (4a ′) of one air bag body (4a).
The air bag body (4a) from the inside through the ventilation hole (10)
Flow into the air chamber (4a ') of both air bags (4a) (4a)
To expand the telescopic body (4) itself to the air bag body (4a) (4
Extend in the overlapping direction of a).

As a result, the support plate (1b) of the headrest portion (1) is pressed backward according to the extension amount of the expandable body (4), and the headrest portion main body (1a) rotates about the shaft attachment portion (7 ') as a fulcrum. And tilt forward to position it in the optimal state, press the operation button (1
Switch 7) to the valve closing position to stop the air supply.

In addition, headrest body (1a) goes backward again from that state.
When inclining, set the operation button (17) to the discharge position and set the air chambers (4a ′) (4) of the air bags (4a) (4a).
By discharging the air in a ′) to the outside, the expandable body (4) contracts, the pressing force against the support plate (1b) is weakened, and it is stretched across the headrest part (1) and the backrest part (2). The headrest main body (1a) is rotated about the shaft attachment (7 ') as a fulcrum by the attraction force of the attracting spring (8), and is tilted rearward.

By the way, the valve (14) is installed on the side of the seat (3), etc. within reach of the user for ease of operation.

The elastic body (4) described above is the air bag body (4a) (4a).
Although two of them are stacked, the number is not limited, and three or more may be stacked, and the portion along the one side edge of the air bag body (4a) is heat-welded. And the like, which may be joined to each other at the time of expansion and may be extended so that the other edge side on the side opposite to the joined portion is opened and has a substantially V-shaped cross section, which can push the support plate (1b) backward. If so, it is arbitrary.

(Effects of the Invention) As described above, the present invention forms a stretchable body by stacking a plurality of inflatable and defensible air bag bodies connected to an air supply device in a communicating manner in the direction of expansion, and using the stretchable body. Since the headrest itself is a vehicle seat that can be tilted back and forth with respect to the backrest, the headrest surface can only be covered by multiple inflatable and retractable air bags that are connected to the air supply device as before. Bulge,
It is very easy to use without the possibility of affecting the surface shape of the headrest portion and destabilizing the head of the user, as in the case of immersing and adjusting.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of a vehicle seat of the present invention with a part cut away, FIG. 2 is an enlarged vertical side view showing a front tilted state of a headrest portion, and FIG. FIG. 4 is a partially cutaway perspective view showing an example of an elastic body, and FIG. 5 is a partially cutaway perspective view showing an example of a molding sheet. It is a figure. In the figure, (A): vehicle seat (1): headrest part (1a): headrest body, (1b): support plate (2): backrest part, (2b): hollow inside (2c): opening Part, (2d): support part (2e ′): stop part, (4): elastic body (4a): air bag body, (4a): air chamber (6): axial hole (9): sheet for molding , (10): Vent

Claims (1)

[Scope of utility model registration request] 1. A main body for receiving a user's head and a support plate provided on a lower surface of the main body constitute a headrest portion, and the support plate of the headrest portion is provided on the top surface of the backrest portion. Inserted into the backrest through the, to form a required space with the stop provided in the backrest, the support plate is rotatably held at any position of the backrest, In the space, an expandable and contractible body formed by stacking a plurality of inflatable and defensible air bag bodies connected to the air supply device in a communication manner in the inflating direction, and air bag bodies at both ends thereof serving as support plates, respectively. A vehicle seat, which is disposed in contact with an impact stop.