JPH0439718Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial field of application" This invention integrates the backrest and the seat,
This invention relates to a seat device in which the angle of the backrest and the condition of the seat can be adjusted.

"Prior Art" Conventionally, a reclining device has been used to make the angle of a backrest adjustable.

As such a reclining device, there is one disclosed in, for example, Japanese Patent Laid-Open No. 199810/1983.

The technique disclosed in the publication is to pivot an arm to a base fixed to the seat of a seat so that its angle can be adjusted, and to fix the base of the backrest to this arm.

As for the seat, the backrest and the seat are molded separately, and then a reclining device is fixed to each and integrated.

``Problem that the invention seeks to solve'' However, with such conventional technology, the seat is composed of three elements: the backrest, the seat, and the reclining device, so each must be molded and assembled, and then Since these parts are combined, there are problems in that there are many parts, and assembly costs and parts management costs increase.

Furthermore, since the reclining device is bulky and protrudes from the side of the seat, sufficient space is required and there is a problem in that it looks like a foreign object in appearance.

The present invention was developed by focusing on these conventional problems, and by integrating the backrest and the seat of the seat, and making the angle of the backrest and the state of the seat adjustable, the above-mentioned problems were solved. The purpose is to provide a seat device that solves the problems.

``Means for Solving the Problems'' The gist of the present invention to achieve this purpose is to provide a seat device that allows the angle of the backrest and the condition of the seat to be adjusted, and which reinforces the backrest. The seat frame part that reinforces the seat part is integrally extended from the lower end of the back frame part to the front part of the seat part to form the main frame, and the front frame part that forms and reinforces the front part of the seat part. is provided at the front end of the seat frame portion, and the front frame is
Connected to the front end of the seat frame portion of the main frame so as to be rotatable around a horizontal axis, and a connecting portion between the back frame portion of the main frame and the seat frame portion pivoted to an installation member so as to be tiltable back and forth around the horizontal axis. The front end of the front frame is pivoted to an installation member so as to be tiltable back and forth around a horizontal axis, and an angle adjustment mechanism is provided to adjustably hold the inclination angle of one of the main frame and the front frame. The present invention resides in a seat device characterized by the following.

"Operation" When the seat is in use, one of the main frame and the front frame is held by the angle adjustment mechanism, and the angle of the backrest and the seat are kept constant.

In order to adjust the angle of the backrest, when the angle adjustment mechanism is operated to release the holding state, the angle of the backrest can be adjusted.

When the backrest is tilted forward or backward, the seat frame also tilts while maintaining the angle with the backrest, and as a result, the front end of the seat frame rotates downward or upward, and the front end of the seat frame rotates. The rear end of the rotatably connected front frame similarly rotates downward or upward.

Therefore, the more the backrest is tilted backward, the more the connecting portion between the front frame and the seat frame portion moves upward, and the seat portion is bent at the center portion.
The angle between the backrest and the rear of the seat remains the same, but the backrest and the rear of the seat are integrally tilted backwards, and the seat has a bent shape in the center, extending the unfolded length of the seat, making it easier to sit on the seat. The person takes a comfortable posture that follows the shape.

By adjusting the angle of the backrest and holding it with the angle adjustment mechanism, the angle of the backrest and the state of the seat are maintained.

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

1 to 4 show an embodiment of the present invention.

The seat device 10 includes a seat 20, an installation member 30 that installs the seat 20 on the floor 11 so as to be movable back and forth, a main frame 40 and a front frame 50 that reinforce the seat 20, and an angle adjustment mechanism 60 that adjusts the inclination angle of the seat 20. It consists of

The seat 20 consists of a backrest 21, a headrest 22, and a seat part 23, and an installation member 30 is provided below the seat part 23.

The installation member 30 consists of rail units 31a and 31b.
These are, respectively, a seat side rail 24 that points to the seat portion 23, and a vehicle body side rail 27 that is slidably fitted to the seat side rail 24 and fixed to the floor 26 of the vehicle body via fixing members 26a and 25b. It consists of

In the main frame 40, a seat frame part 42 extends from a back frame part 41 that reinforces the backrest 21 to a part excluding the front part of the seat part 23, and the back frame and the seat frame part 42 are integrated by a pipe member. It is formed by

A headrest 22 is attached to the upper part of the back frame portion 41.
A reinforcing member 43 is fixedly provided to reinforce the back frame portion 41, and a cushion member 44 and a lower frame 45 are provided at the center and lower part of the back frame portion 41.

A cushion net 46 is stretched over the seat frame portion 42, and both rear sides of the seat frame portion 42 are connected to the seat side rails 24 via rear hinges 47, respectively.
The main frame 40 is supported by a rear mounting member 28 fixed thereon so as to be tiltable back and forth by a pivot (not shown).

The front frame 50 is provided in front of the seat frame part 42 to reinforce the front part of the seat part 23, and both sides of the front part are fixed on the seat side rail 24 via front hinges 51. The front frame 50 is supported by a pivot (not shown) on the mounting member 29 so as to be tiltable back and forth.

Further, central hinges 52 are fixed to both sides of the front end of the front frame 50, and each central hinge 52 is provided with an elongated hole 53 extending in the front-rear direction. Pins 48 protruding from the sides of the front end of the seat frame portion 42 are movably engaged in each elongated hole 53, and a bolt 55 for preventing detachment is fixed to the tip of the pin 48 via a washer 54. Cage, long hole 5
A front frame 50 is rotatably connected to the front end of the seat frame portion 42 by engagement of the pin 48 with the front frame 50 .

The angle adjustment mechanism 60 includes protrusions 61 and 62, an operating lever 63, a locking bracket 64, a spring 65, and a pin 66.

The projecting pieces 61 and 62 are provided on the seat-side rail 24 so as to project upward while maintaining a predetermined distance from each other.

The operating lever 63 has a proximal end rotatably supported by both the projecting pieces 61 and 62, a distal end thereof bent in a direction, and a handle 67 provided at the distal end.

The lower end of the locking bracket 64 is connected to the operating lever 6.
3, and is disposed between both protrusions 61 and 62, and swings back and forth as the operating lever 63 rotates.

Further, a plurality of notches 68 are provided on the rear end side of the locking bracket 64 to engage with pins 66 that protrude laterally from one side of the front frame 50.
A spring 65 is provided between the locking bracket 64 and the seat side rail 24 to bias the pin 66 and the notch 68 rearward so as to maintain the engaged state.

Next, the action will be explained.

When the seat 20 is in use, the angle adjustment mechanism 6
The pin 66 is inserted into the notch 68 of the locking bracket 64 of
are engaged, and the engaged state is maintained by the biasing force of the spring 65, so that the main frame 4
0 and the front frame 50 as shown in FIGS.
As shown by the solid line in the figure, it is kept in a constant state.

In order to adjust the angle of the backrest 21 further back as shown by the two-dot chain line in FIGS. 2 and 4,
When the handle 67 of the operating lever 63 is rotated from above to the front against the biasing force of the spring 65, the notch 68 of the locking bracket 64 is removed from the pin 66, as shown by the two-dot chain line in FIG. The seat 20 can be adjusted in angle.

In this state, when the backrest 21 is tilted backwards to a desired angle, the mutual angle does not change because the seat frame part 42 is integrally formed with the back frame part 41, and the seat frame part 42 becomes the back frame part 41. At the same time, as shown by the two-dot chain line in FIG. 2, the front end of the seat frame portion 42 rotates about the pivot that supports the rear hinge 47, and moves upward.

When the seat frame portion 42 rotates, the pin 48 is engaged with the elongated hole 53 of the central hinge 52 of the front frame 50, so the front frame 50 rotates around the axis that pivots the front hinge 51. The rear end of the front frame 50 moves upward. Therefore, at the connecting portion between the front frame 50 and the seat frame portion 42, as shown by the two-dot chain line in FIG.
3 will be folded. The bending angle of the seat portion 23 becomes larger as the backrest 21 inclines more.
As the seat part 23 increases, the unfolded length of the seat part 23 increases by the amount that the seat part 23 is bent, thereby stabilizing the sitting state of the seated person.

After adjusting the backrest 21, release the handle 67.
Due to the biasing force of the spring 65, the locking bracket 64 swings backward, and the notch 68 of the locking bracket 64
The main frame 40 and the front frame 50 are restrained to the seat side rail 24, and the angle of the backrest 21 and the state of the seat 23 are maintained.

In this embodiment, as the angle adjustment mechanism, a case has been described in which the front frame is held in an adjustable manner, but the main frame may be held in an adjustable manner.

"Effect of the invention" According to the seat device according to the invention, the backrest and the seat are integrated, the seat is pivoted to the installation member so that it can be tilted back and forth, and the angle of the backrest can be adjusted with a simple structure. As a result, the seat can be easily assembled with a small number of parts, and costs can be reduced. A unique and comfortable seating area can be obtained in which the entire backrest is tilted forward and backward without changing the angle between the backrest and the rear part of the seat, and the central part of the seat is bent to expand and contract its unfolded length. It can be installed by attaching the seat to an installation member, and is easy to install in places where installation space is limited, such as in automobiles. Also, there is no need for a large reclining device like in the past.
It is possible to utilize the space effectively without creating an unnatural appearance.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention, and FIG. 1 is an exploded perspective view of the seat device showing the exterior, FIG. 2 is a side view of the seat device, and FIG. 3 is a front view of the angle adjustment mechanism. 4 are explanatory diagrams of the tilting motion of the seat and backrest. DESCRIPTION OF SYMBOLS 10... Seat device, 20... Seat, 21... Backrest, 23... Seat part, 30... Installation member, 40...
...Main frame, 41...Back frame section, 42...
Seat frame portion, 50...front frame.

Claims (1)

[Scope of Claim for Utility Model Registration] A seat device that makes it possible to adjust the angle of the backrest and the condition of the seat, which integrates the seat frame that reinforces the seat from the lower end of the back frame that reinforces the backrest. A front frame that extends to the front of the seat to form the main frame, and that forms and reinforces the front of the seat is provided at the front end of the seat frame;
Connected to the front end of the seat frame portion of the main frame so as to be rotatable around a horizontal axis, and a connecting portion between the back frame portion of the main frame and the seat frame portion pivoted to an installation member so as to be tiltable back and forth around the horizontal axis. The front end of the front frame is pivoted to an installation member so as to be tiltable back and forth around a horizontal axis, and an angle adjustment mechanism is provided to adjustably hold the inclination angle of one of the main frame and the front frame. A seating device characterized by: