JPS6332655B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a type of rotary seat that can rotate around an axis substantially perpendicular to the floor surface and change its direction from front to back. The invention relates to a rotating seat that has all possible functions.

This type of rotating seat is useful as a seat for a vehicle, especially an automobile, and conventionally it has generally been constructed as shown in FIG. 3, for example. That is, a rotating shaft d is fixed at the center of the lower surface of a rotary plate c on which a seat body b is placed so as to be adjustable in the longitudinal direction via a seat slide mechanism a, and this rotating shaft d is fixed on a floor surface e. The support tube f is slidably fitted into the support tube f. and,
A locking pin g is provided on the support tube f so that it can move forward and backward in the radial direction, and blind holes h, i, and
j and k are provided with openings on the outer circumferential surface of the rotating shaft d.

When it is desired to reverse the seat body b from the direction shown in the drawing, the lock pin g is first pulled out from the blind hole i, and the rotating shaft d and the rotating plate c are raised by the spring l and placed in a free state. After that, the seat body b is rotated 180 degrees together with the rotating plate c and the rotating shaft d, and by moving up and down as appropriate, the pin g enters the blind hole i or k to lock the shaft d in the axial direction and rotational direction, Complete the work. Also, if it is desired to return the seat body b to the direction shown in the drawing, this can be done by inserting the pin g into the blind hole h or j in the same manner.

However, in the rotary seat of such a conventional structure, the axis d and cylinder f, which are essential for the rotation of the seat, are located below the center of the rotary plate c that supports the seat body b,
In addition, since the spring l that raises the seat body b during rotation so as not to interfere with other parts is placed in the cylinder f by acting on the lower surface of the shaft d, the seat rotation mechanism occupies the space below the seat cushion. This not only reduces the head clearance but also makes the seat cushion uncomfortable to sit on. In addition, the seat mount and the seat body have little commonality with general ones and have to be made special, which reduces the degree of freedom in vehicle design, as well as the shaft d, tube f, pin g, spring l, etc. Another disadvantage was that many additional parts were required, resulting in a significant increase in weight.

In view of the above, the present invention is a technology that makes it possible to solve the various problems mentioned above by using almost no separate parts and only partially improving the structure of a normal front-rear sliding seat to make it a rotating seat. It proposes ideas.

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

FIG. 1 shows an example configuration of the rotary seat of the present invention,
In the figure, 1 is a frame for forming the seat back of the seat body, and 2 is a frame for forming the seat cushion of the seat body.These seat back frame 1 and seat cushion frame 2 are attached to fixed arms 3, 4, and 5, respectively. , 6, and the relative angle can be adjusted by a normal reclining mechanism 7 provided between the arms 3 and 5.

Reference numeral 8 denotes a pair of mutually parallel slide rails arranged in the front and back direction of the seat and parallel to each other on the floor surface, and these slide rails 8 have a generally C-shaped cross section as usual, and are arranged with the opening sides facing each other. However, the front end 8a and the rear end 8b are opened upward and expanded to form a removable portion. A front slider 9 and a rear slider 10 are slidably engaged in each slide rail 8, and the front slider 9 and the rear slider 10 are connected to the front beam 11, respectively.
and a rear beam 12.

The seat cushion frame 2 is made into a one-piece structure by processing a wire rod, and is shaped into a substantially rectangular shape having a front edge 2a, a rear edge 2b, and two side edges 2c connecting these sides. This seat cushion frame 2 has both sides 2c connected to the corresponding front sliders 9 near its front edge, and its rear edge 2c.
b is supported at its center on a rear beam 12 that connects the rear sliders 10 and constitutes a part of the rear slider. For this support, a bearing sleeve 13 as a bearing section is axially positioned and rotatably fitted in the center of the rear edge 2b of the seat cushion frame, and the bearing sleeve 13 projects outward in the radial direction. A vertical shaft 14 is integrally provided, and this vertical shaft 14 is rotatably supported on the rear beam 12 by a bearing 15.

Thus, the seat cushion frame 2 is placed on both slide rails 8 via the four sliders 9 and 10, and can move in the front-back direction under the guidance of these sliders and slide rails. A normal slide lock mechanism 16 is provided for fixing the position after adjusting the position. The slide lock mechanism 16 consists of a lock release lever 17 fixed to one rear slider 10 and a long lock plate 18 fixed to the slide rail 8 on the corresponding side. A lock pawl (not shown) enters the square hole 18a of the lock plate 18 and locks the seat cushion frame 2.
The lever 17 is prevented from sliding and the seat cushion frame 2 is fixed in this position.
During the operation, the lock pawl is inserted into the lock plate hole 18.
By escaping from a, the seat cushion frame 2 can be slid and moved, and its position can be adjusted.

Furthermore, both ends of the rear edge 2b of the seat cushion frame 2 are bent into a crank shape, and locking portions 19 and 20 are provided which are substantially parallel to the rear edge 2b and are offset forward in the seat longitudinal direction, These locking portions 19 and 20 are engaged in corresponding notch grooves 10a and 10b provided in the rear slider 10. Both rear sliders 10 further have cutout grooves 10a, 10.
Another notch groove 10a', 10 arranged at the same level as b
b', the notch groove 10a' is arranged corresponding to the above-mentioned deviation amount of the locking part 19 like the notch groove 10a, and the notch groove 10b' is arranged corresponding to the above-mentioned deviation amount of the locking part 20 like the notch groove 10b. and place it.

The operation of the rotary seat of the present invention having the above-described structure will be explained next.

1 and 2A show a usage state in which the seat is in its normal orientation, and in this state, the seat back frame 1 is moved relative to the seat cushion frame 2 by operating the reclining mechanism 7 as usual.
You can adjust the angle of the slide lock mechanism 1.
By the operation 6, the position of the seat cushion frame 2 in the longitudinal direction can be adjusted.

If you want to use the seat with the front and back reversed, first use the lever 17 of the slide lock mechanism 16.
, and bring the seat to the forward limit slide position as shown in Figure 2B. At this time, both front sliders 9 connected to the front beam 11
rides on the corresponding upward open end 8a of the husband slide rail 8, and the upward movement of the front slider 9 is no longer restricted. In this state, after the seat back frame 1 is tilted forward as much as possible, preferably by operating the reclining mechanism 7, the front edge 2a of the seat cushion frame 2 is lifted as shown in FIG. 2C. At this time, the rear edge 2b of the seat cushion frame 2 is connected to the bearing sleeve 13.
Since the locking parts 19 and 20 are rotatably supported within the rear edge, they rotate in the corresponding direction around the rear edge, and at the same time, the locking parts 19 and 20 are biased toward the front of the seat from the rear edge 2b, so that the notch groove 10a , 10b, and the seat cushion frame 2 can be rotated around an axis perpendicular to the floor surface.

Thereafter, the seat cushion frame 2 and the seat back frame are rotated 180 degrees around the vertical axis 14 as shown in FIG. 2D, and the front slider 9 is moved from the slide rail as shown in FIG. 8 upward open rear end 8b
Adjust the slide position so that they are aligned at the top. Then, as shown in FIG. 2F, the seat cushion frame 2 is rotated back by lowering the front edge 2a, the front slider 9 is brought onto the upwardly open rear end 8b of the slide rail 8, and the reclining mechanism 7 is operated. Raise the seat back frame 1. At this time, the locking portions 19 and 20 retract into the notch grooves 10a' and 10b' of the rear slider 10, respectively, and prevent the seat cushion frame 2 from rotating around the axis perpendicular to the floor surface. This can prevent the front edge 2a of the seat cushion frame 2 from wobbling sideways from the aligned position with respect to the slide rail 8.

After that, the lever 17 of the slide lock mechanism 16
By pulling the seat backward in the longitudinal direction of the seat as shown in FIG. This locks the seat in this position and allows it to be used in the reverse direction.

In addition, the reclining adjustment and slide position adjustment of the seat can be performed in the same way as in normal situations even in this reversed orientation, and when returning the seat to its original orientation, it must be done using the same procedure as described above. Needless to say, it can be done.

Thus, in the rotating seat of the present invention, by lifting the front edge of the seat cushion frame at the forward limit slide position of the seat, the seat cushion frame can be rotated around the rear edge. Since the cushion frame is configured to be able to rotate around an axis perpendicular to the floor surface at the center of its rear edge, for example, due to the detailed structure described above, almost no separate parts are used, and the ordinary sliding seat structure is only partially improved. in,
You can get a rotating seat. Therefore, the rotary seat of the present invention is first of all lightweight, and moreover, the space below the seat cushion frame can be easily used as a rotary seat.
Since it can be secured to the same size as a normal sliding seat, the seat cushion can maintain good sitting comfort. Further, since there is no need to make any changes to the seat mount and the seat body, these can be made common to other parts, and the mass production effect can be enhanced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the structure of the rotary seat of the present invention, FIG. 2 is an explanatory diagram of an operation process for reversing the direction of the rotary seat, and FIG. 3 is a sectional view of a main part of a conventional rotary seat. 1... Seat back frame, 2... Seat cushion frame, 2a... Front edge, 2b...
Rear edge, 7... Reclining mechanism, 8... Slide rail, 8a... Upward open front end, 8b
...Upward open rear end, 9...Front slider, 10...Rear slider, 10a, 10a', 1
0b, 10b'... Notch groove, 11... Front beam, 12... Rear beam, 13... Bearing sleeve, 14... Vertical shaft, 15... Bearing, 16... Slide lock mechanism, 19, 20... Connection Stop.

Claims (1)

[Scope of Claims] 1. A seat cushion frame and a seat back frame are pivotally connected to each other so that their relative angles can be adjusted, and the seat cushion frame is slid on a plurality of mutually parallel slide rails via a front slider and a rear slider. In the seat supported in a position-adjustable manner, the rear edge of the seat cushion frame is rotatably supported around the rear edge by a bearing on a rear slider, and the bearing is rotatable about a vertical axis, and each A rotary seat characterized in that a removable part is provided at each end of the slide rail to allow a front slider to be removable from the slide rail so that the front edge of the seat cushion frame can be raised and lowered. 2. The rotary seat according to claim 1, wherein the vertical axis is located at the center of the rear edge of the seat cushion frame. 3. Both ends of the rear edge of the seat cushion frame are each shaped like a crank, and locking portions are provided that are approximately parallel to the rear edge and offset forward in the seat longitudinal direction, and cut grooves are formed in which these locking portions engage. The rotary seat according to claim 1 or 2, formed on the rear slider.