JPS5941876Y2 - seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to seats, particularly vehicle seats, in which the tilting action of the seat back and the forward and backward movement of the seat cushion can be performed in conjunction with each other.

For example, in seats where a member such as a single wall is installed on the rear side of the seat back, such as the rear seat of a passenger car, the seat back cannot be tilted independently relative to the seat cushion, so the seat back tilts. Since it is necessary to move the seat cushion back and forth with the movement of the seat cushion, conventionally a slide device has been attached to the seat cushion so that the seat cushion can be slid back and forth when the seat back is tilted.

However, since this seat cushion slides simply in a straight line in the horizontal direction, the so-called hip point, which corresponds to the center of rotation between the torso and girth of the seated person, simply moves in parallel. When the seat back is tilted backwards, the hip point moves forward and becomes higher, which causes the seated person's back and buttocks to shift, making it difficult to maintain a stable sitting posture and requiring the user to sit back down. The seat is located close to the front installation member of the front seat, etc., giving a feeling of pressure and making it difficult to get on and off the seat.

Therefore, in order to eliminate the drawbacks of the conventional method, the present invention moves the seat cushion, which slides forward when the seat back is tilted backwards, horizontally at the rear and lifts up at the front, making the seat cushion move forward as a whole. To provide a seat configured to perform tilting movement so as not to change the height near the hip point.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, S indicates a vehicle seat, sb is a seat back, and Sc is a seat cushion.The back frame 1 of the seat back sb and the cushion frame 2 of the seat cushion Sc are pins protruding horizontally from the lower end of the back frame 1. 3 and a long hole 5 formed vertically in a bracket 4 protruding from both rear sides of the cushion frame 2, thereby being connected to each other.

Brackets 6 are fixed to the lower halves of both sides of the back frame 1, and are pivotally supported by shaft pins 8 to brackets T fixed to the rear wall surface W, and support columns 9 are arranged vertically in the center. The distal end of the link piece 11 of the moving device 10 is pivotally mounted at a substantially central portion between the support columns 9, that is, located above the pivot point.

In the moving device 10, a screw rod 12 is horizontally suspended in the front-rear direction with respect to the back frame 1, and the link piece 1 is attached to the screw rod 12.
1 are screwed together, and this threaded rod 12 is rotated by a motor 13 via a speed reducer 14 to move the link piece 11 in the front-rear direction.

On the other hand, link pieces 16 are pivotally attached to the front portions of the lower surface of both sides of the cushion frame 2 via brackets 15, and leg pieces 18 each having a trochanter 1T pivotally attached to the lower portion thereof are fixed to the rear portions. The trochanter 1 of this link piece 16 and leg piece 18
Reference numeral 7 indicates a supporting board 19 fixed to the floor surface B corresponding to both sides of the cushion frame 2, and a link piece 16 is pivotally connected to a bracket 20 protruding from the front part, and a trochanter of the leg piece 18 17 is movably engaged with a guide rail 21 formed horizontally in the front-rear direction at the rear.

Note that it is normal to configure the seat back sb and the seat cushion Sc by installing seat spring assemblies in the back frame 1 and the cushion frame 2, respectively, and placing a seat pad on the surface side and covering it with an outer skin. It is like that.

Next, the operation of the seat of this example configured as above will be explained.

Now, the seat back sb and the seat cushion Sc are placed in the normal state as shown by the solid line in FIG.
The front link piece 16 is tilted backward, and in order to tilt the seatback sb backward from this state, the motor 13 of the moving device 10 is driven to rotate the threaded rod 12 via the reducer 14. and move the link piece 11 backward (in the direction of arrow a).
When the back frame 1 is moved to , the back frame 1 is rotated clockwise in FIG. 1 about the pivot support formed by the lower half bracket 6.7 and the pivot pin 8, that is, the part below the pivot support is pushed forward. tilted backwards.

Therefore, the cushion frame 2 of the seat cushion Sc
is pushed forward by the engagement of the pin 3 with the elongated hole 5 of the bracket 4 at the lower end of the back frame 1, but at this time, the front part of the seat frame 2 is pushed forward by the link piece 16. The seat cushion Sc is lifted up by the standing rotation, and at the rear, the trochanter 17 of the leg piece 18 is moved in the horizontal direction by relocation within the guide rail 21, so the seat cushion Sc is pushed out and tilted high forward (Fig. 1). (double-dashed line).

In this way, in the seat of this example, when the seat back sb is tilted backward, the seat cushion S
In case of c, only the front part is lifted up without changing the height of the rear part, that is, it is pushed forward in a high incline, so the height near the hip point H hardly changes and is kept substantially constant.

Further, in this state, when the seat back sb is rotated in the upright direction, the seat cushion Sc is moved backward while the front portion thereof is lowered and returned to its original state.

FIG. 3 shows another embodiment of the seat according to the invention.

In this example, the front half portions 2a of both sides of the cushion frame 2 are tilted forward and the rear half portions 2b are formed horizontally, and the front half portions 2a and the rear half portions 2b have trochanters 17a and 17b at the bottom, respectively. The support substrate 19, which fixes the pivoted leg pieces 18a and 18b and is fixed to the floor, has a front half with an inclined surface 19a that slopes high upwards, and a rear half with a horizontal surface 19.
b, and guide rails 21a and 21b are formed on the inclined surface 19a and the horizontal surface 19b, respectively, so that the leg piece 18
The trochanters 17a and 17b of a and 18b are engaged with each other so as to be able to roll freely.

In this example, the other members, that is, the structural members on the back frame 1 side, have the same structure as those of the above-mentioned embodiment, so the same reference numerals are given and the explanation will be omitted.

Also in this example configured in this way, the seat back sb
When the seat cushion Sc is tilted rearward, the seat cushion Sc is pressed forward, and due to this compression, the cushion frame 2 is moved so that the trochanter 17a of the leg piece 18a fixed to the front half 2a is pressed against the support substrate 1.
The front portion of the seat cushion Sc is lifted up while being rolled and pushed out along the upward slope of the inclined surface 19a of the seat cushion Sc, and the seat cushion Sc is tilted forward and moved forward (as shown by the two-dot chain line in FIG. 3).

In the configuration of this example, both sides of the cushion frame 2 are formed with the front half 2a inclined, but are formed horizontally across the front and rear half parts 2a and 2b, and the leg pieces 18b fixed to the rear half 2b are formed horizontally. Leg piece 18a fixed to the front half 2a
The support substrate 19 may be formed to be longer, or the front half of the support substrate 19 may be formed with a gently curved slope 19a, and the guide rail 21 may be formed continuously over the entire length.

Furthermore, a hydraulic actuator, an air cylinder, etc. may be used as the moving device 10 for moving the back frame 1 up and down, and the back frame 1 is pivoted at its upper end side, etc., except for the part where it engages with the seat frame 2. Although the moving device 10 may be pivoted at a portion remote from the pivot point, if the middle portion of the back frame 1 is pivoted as in the above-mentioned embodiment, the back frame 1 can be enlarged with a slight movement of the moving device 10. This means that it can be tilted.

As described above, according to the present invention, as the seat back tilts toward the rear, the front part of the seat cushion is lifted up, and the rear part is moved horizontally and pushed out while being tilted higher forward. The height of the surrounding area hardly changes, which prevents the seated person from shifting their back or buttocks when the seatback is tilted, allowing them to change their posture easily without having to sit up again. You can smoothly change to the desired sitting position while sitting in the same position.
It allows you to sit comfortably, and especially when applied to the driver's seat of a car, you can always maintain an ideal driving posture, which reduces fatigue and allows you to drive comfortably.

It goes without saying that the present invention is not limited to vehicle seats, but can also be applied to treatment chairs in dental units, hairdressing chairs, furniture chairs, and the like.

[Brief explanation of drawings]

Fig. 1 is a side view of an example of the seat according to the present invention, Fig. 2 is a perspective view of the same frame section, Fig. 3 is a side view of another example of the seat according to the invention, and Fig. 4 is another example of the seat support part. FIG. In the figure, S is the seat, sb is the seat back, Sc is the seat cushion, 1 is the back frame, 2 is the seat frame, 3
is the pin, 4 is the bracket, 5 is the length JL6.7 is the bracket, 8 is the shaft pin, 10 is the moving device, 11 is the link piece, 1
6 is a link piece as a lifting means, 17 is a trochanter, 18 is a leg piece, 19 is a support substrate, 19a is an inclined guide surface as a lifting means, and 21 is a guide rail.

Claims (1)

[Scope of utility model registration request] A long hole in the vertical direction is formed in either the lower end of the seat back or the rear end of the seat cushion, and a pin is provided protruding from the other, and the seat back and the seat cushion are connected to each other by inserting the pin into the long hole. The seat back is rotatably supported in the longitudinal direction by a bracket fixed to the rear wall surface at a portion near the connection portion, and the shaft of the seat back is movably connected. A driving means is connected to a portion spaced apart upwardly from the branch, and the seat cushion is movable in the front and rear direction with respect to a support board installed on the floor, and a front portion is provided between the seat cushion and the support board. The seat is characterized in that the upper means is provided with a horizontal moving means at the rear, and the seat cushion is tilted upwardly toward the front as the seat back is tilted rearward.