JPH0259724B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is directed to the degree of holding force for a seated person;
The present invention relates to a seat device that can change so-called holdability.

(Prior Art) As a conventional sheet device, one shown in FIG. 5, for example, is known.

This conventional seat device has side supports 03 and 0 on both left and right sides of the back contact surface 02 of the seat back 01.
3, and the side supports 03, 03 were provided so as to be tiltable in the directions indicated by arrows a and a.

Therefore, when a person is seated, the side supports 03, 03 can be tilted to bring them into pressure contact with, in contact with, or close to both sides of the person's torso, thereby changing the holding property.

(Problems to be Solved by the Invention) However, with such conventional seat devices, it is not possible to change the holding feeling or holdability of the back of the seat back, and as a matter of course, the side support There was a problem that the method could not be applied to a seat device that does not have the following.

(Means for Solving the Problems) Therefore, the present invention solves the above-mentioned conventional problems by using a new means for changing the holdability of the seat device by manipulating the back contact surface of the seat bag, which is a part other than the side supports. The seat device of the present invention is intended to solve this problem, and as a means for solving the problem, the seat device of the present invention has the following features:
In a seat device comprising a seat back, a skin is stretched over at least a back contact surface of the seat back, and a cushion material is provided that elastically supports the skin, the seat back having a vertical portion of the skin on the back contact surface facing toward the back side. A tension member is provided, and a tension adjustment device is provided to adjust the tensile force of the tension member.

(Function) Therefore, according to the seat device of the present invention, the tension member pulls the skin of the vertical portion of the back surface of the seat back toward the back side, changes the cross-sectional shape of the seat back, and allows the person to sit on the back surface of the seat back. By changing the area in contact with the person's back, the reaction force per unit area of the back contact of the seat bag is changed, thereby changing the area and amount by which the back contact of the seat back sinks, and as described below. By changing the shape of the back surface of the seat bag that is experienced by the user, the holding feeling of the seat device can be changed.

Further, by adjusting the tensile force of the tension member using the tension adjustment device, the holdability of the seat device can be adjusted.

In addition to the actual amount of sinking into the seat back, the holding ability of the seat back is also greatly influenced by sensory factors.A person's back is a part of the body that easily feels surface pressure, and the seat back presses against the back. When the immediate reaction force per unit area is strong, the back surface feels flat, and when the reaction force per unit area is weak, the back surface feels sunken.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, a first embodiment shown in FIGS. 1 to 6 will be described.

Reference numeral 1 denotes a seat bag, which has a back support surface 2 for supporting a person's back and is rotatably provided on a seat cushion 3.
A seat back frame 4 is provided as a core material, and side supports 5, 5 are provided on both sides of the back contact surface 2.
is provided, a headrest 6 is provided on the upper part,
A cloth skin 7 is provided on the outer surface.

The skin 7 is elastically supported by a cushion material 8 made of urethane foam.

10 is a tension member, and the seat bag 1
This tensioning member 10 is provided in
The drawings 15, 15 are sewn at the boundary between the back abutting surface 2 and the side supports 5, 5, and the fixing rods 11, 11 inserted into the drawing fabrics 15, 15.
and the bracket 1 of the seat back frame 4.
A rotating rod 12 and a driven rod 17 are provided in the brackets 6 and 16 so as to rotate, respectively, a link 13 for interlocking the driven rod 17 with the rotating rod 12, and a driven rod opened in the bracket 16. 17, and tension springs 14, 14, 14, 14, which connect the fixed rods 11, 11, the rotating rod 12, and the driven rod 17 while maintaining elasticity.
It consists of and.

The tension spring 14, 14, 14, 14
One end is attached to the upper and lower ends of the fixed rods 11, 11, respectively, and the other end is attached to the eccentric part 121 remote from the rotation axis of the rotating rod 12 or the driven rod 1.
7 is attached to the rotating rod 1.
2 is rotated, the driven rod 17 is also rotated along the elongated hole 13 by the link 13, and both rods 1
tension springs 14, 14, 1 by 2, 17;
The attachment ends of the rods 4 and 14 are moved back and forth, thereby changing the force with which the fixing rods 11 and 11 are pulled.
The tension of the seat back 1 has been changed, and the
The cross-sectional shape of is changed.

Reference numeral 20 denotes a tension adjustment device, and the tension member 1
This tension adjustment device 20 is connected to the rotation rod 12 and
the bracket 16 of the seat back frame 4;
16 via fixed legs 26, is rotatably supported by a base 27 located on the side surface of the seat skin 7,
Moreover, it is provided so as to be located on the side surface of the side support 5.

The tension adjustment device 20 is connected to the rotation rod 12.
can be fixed at any rotational position, and by adjusting the rotation angle of the rotation rod 12, the tensile force of the tension member 10 can be adjusted.

Further, reference numeral 21 denotes a fixing release button, which is slidably provided on the lever 25 and releases the fixation of the rotation rod 12 by the tension adjustment device 20. A lock pin 22 provided at the tip of a supported bell crank 28 is attached to a lock plate 2 having lock teeth 24 fixed to a base 27 with bolts 29.
3, and is unlocked by removing the lock pin 22 from the lock teeth 24.

Reference numeral 19 denotes an end of the rotating rod 12, which is formed into a prismatic shape and is fixed to the lever 25 so as to transmit the movement of the lever 25 to the rotating rod 12.

Reference numeral 34 denotes a return spring for the fixing release button 21, which is biased in the direction of protrusion from the lever 25 and in the direction of engagement with the lock pin 22.

35 is a sliding surface when the lever 25 rotates, and is formed into a circular shape and abuts around the lock plate 23. Note that the lock plate 23 includes a rotating rod 1.
A hole is drilled through the end 19 of 2, and a resin spacer 36 is provided in the hole.

Next, the operation of the first embodiment will be explained.

As shown in FIG. 2, push the release button 21 of the tension adjustment device 20 to release the lock pawl 22 from the teeth 24 of the lock plate 23, disengage the lever 25, and then operate the lever 25 to rotate. When the eccentric portion 121 of the moving rod 12 is brought closest to the back abutment surface 2, the tensile force of the tension member 10 becomes minimum and the back abutment surface 2 of the seat back 1 becomes flat.

At this time, the driven rod 17 is rotated by the link 13.

When a person is seated on the seat device in this state, the back A1 is in contact with the back contact surface 2 over a wide area as shown by the two-dot chain line, and at this time, the reaction force of the seat back 1 against the load of the torso A is P1 in this figure. As shown in , it is distributed almost evenly over the entire width of the back.

In this way, when the entire back A1 comes into contact with the flat back contact surface 2, the reaction force of the seat back 1 against the load spreads over the whole area, and the reaction force per unit area becomes smaller, as if sinking into the soft seat back 1. As you feel it, the holding feeling and holdability of the seat bag 1 increases.

Further, as shown in FIG. 3, the tension adjustment device 20
When the eccentric portion 121 of the rotating rod 12 and the driven rod 17 are moved farthest away from the back contact surface 2 by operating the Both ends are compressed between the seat spring 9 and both ends (side port side) are pulled more than the center to become convex.

When a person is seated on the seat device in this state, the back A1 contacts the back contact surface 2 in a narrow area as shown by the two-dot chain line, and at this time, the reaction force of the seat back 1 against the load of the torso A is As shown by P2, the distribution is high at the center and low at both ends.

In this way, when the narrow part of the back A1 comes into contact with the convex back contact surface 2, the range in which the reaction force of the seat bag 1 against the load occurs becomes narrower, and the reaction force per unit area increases, and the hard flat seat back 1 It feels like it's touching, and the holdability is low.

Next, a second embodiment shown in FIG. 4 will be described.

In this embodiment, the tension member 30 includes a winding rod 31 rotatably provided with respect to the bracket 16 of the seat back frame 4, a winding portion 32 provided on the winding rod 31, and a winding portion 32 provided on the winding rod 31. an adjustment dial 40 that can be used to arbitrarily rotate the winding rod as a tension adjustment device using the tension strings 33, 33 wound around the part 32 and connected to the fixed rods 11, 11; This is an example using .

Therefore, by rotating the adjustment dial 40 and adjusting the amount of winding of the tension cords 33, 33 by the winding sections 32, 32 of the winding rod 31, the tensile force that pulls the back contact surface 2 can be adjusted. The shape of 2 can be changed for the time being.

Note that the other configurations and operations of the second embodiment are the same as those of the first embodiment, so the same reference numerals are given and the explanation will be omitted.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, in the embodiment, both ends of the back abutment surface 2 are pulled, but it may be pulled on the inside or in the middle of both ends, or instead of pulling at the two top and bottom places of the back abutment surface 2. , one or more than one location may be drawn.

Further, it is possible to adjust the tension force of a tension member, such as a tension device that adjusts the tension force by rotating a spring and changing the elastic force, or a tension device that uses a spring as the tension cord 33 in the second embodiment. However, any other means may be used.

(Effects of the Invention) As described above, according to the seat device of the present invention, by pulling the outer skin of the back contact surface of the seat bag toward the back side, the area of the back contact surface that the back contacts when a person is seated is changed, and thereby To provide a completely new means that has not been seen before, in which the area and amount of sinking of the back contact surface is changed, and the shape of the back contact surface that is experienced is changed to change the holding feeling and holding property of a seat device. It is something that can be done.

Furthermore, this has the effect of making it possible to change the holding properties in a seat device that does not have side supports.

Further, it can be manufactured by simply adding a tension member and a tension adjustment device to a conventional sheet device, and the structure is simple and can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a seat device according to an embodiment of the present invention, FIGS. 2 and 3 are sectional views showing changes in shape of essential parts of the device according to the first embodiment, and FIG. FIG. 5 is an enlarged sectional view of the back contact and side support portion of the part where the tension adjustment device is not provided, FIG. 6 is a sectional view showing the main parts of the tension adjustment device, and FIG. 7 is the present invention. FIG. 8 is a perspective view showing the device of the second embodiment, and a sectional view showing the conventional example. 1... Seat back, 2... Back surface, 7... Outer skin, 8
...Cushion material, 10, 30...Tension member, 20...
Tension adjustment device, 40...adjustment dial (tension adjustment device).

Claims (1)

[Scope of Claims] 1. A seat device including a seat bag, a skin stretched over at least a back contact surface of the seat bag, and a cushion material that elastically supports the skin, wherein the seat back is provided with a skin of the back contact surface. A sheet device comprising: a tension member that pulls a longitudinal portion toward the back side; and a tension adjustment device that adjusts the tensile force of the tension member.