JPH0541951Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is used as a vehicle seat, etc.
The present invention relates to a suspension seat having a function of elastically supporting a seat cushion portion on the floor side of a vehicle body to absorb and absorb external driving forces and shocks.

[Prior Art] In recent vehicle seats, in order to obtain cushioning properties commensurate with the weight of the seated occupant, a suspension X is installed between the seat cushion and the vehicle floor.
A suspension seat including a link mechanism has been proposed.

This suspension sheet, for example,
As exemplified in Japanese Patent No. 61-161132, a structure is adopted in which a seat cushion is elastically supported by an X-link mechanism and a suspension body so as to be movable in the vertical direction. Further, a torsion spring is latched onto the X-link mechanism, and the urging force of the torsion spring pushes up the seat cushion portion. As this torsion spring, a torsion bar that utilizes the torsional stress of the spring is used, and is disposed below the seat cushion portion in a state that largely protrudes from both left and right sides of the X-link mechanism.

[Problem to be solved by the invention] Therefore, in the conventional suspension seat, the length of the torsion bar must be increased to a certain extent in order to obtain a predetermined spring pressure.
As mentioned above, both ends of the torsion bar protrude greatly to the left and right sides of the X-link mechanism, so
To avoid collision between the torsion bar and the door,
It is necessary to provide a large space between the door and the seat. This has resulted in the problem of wasted indoor space. In addition, the torsion bar protrudes from both sides of the seat, giving an unsightly appearance and giving a feeling of pressure, making it less stylish. Furthermore, the structure is complex and there are many parts.
There was also the problem of high costs.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a suspension seat having a structure that improves the appearance.

[Means for Solving the Problems] In order to achieve the above object, the present invention interposes an X-link mechanism between the upper frame to which the seat cushion section is attached and the lower frame attached to the floor side. In the suspension seat, the suspension seat is provided with a torsion spring that applies a biasing force for pushing up the seat cushion portion to the X-link mechanism. A letter-shaped X-link member, a common support shaft member that vertically supports the X-link members on both sides, and a cylindrical member disposed between the X-link members with the support shaft member inserted therein. A coil spring is used as the torsion spring, and is wound around the outer periphery of the cylindrical member, and both ends of the torsion spring are latched to the corresponding X-link member.

[Function] According to this configuration, a coil spring is used as a torsion spring, and is wound around the outer periphery of a cylindrical member disposed between the X-link members on both sides, and both ends of the coil spring are hung on the corresponding X-link member side. Since it is stopped, both ends of this torsion spring no longer protrude from both the left and right sides of the X-link mechanism.

[Example] Hereinafter, an example of the present invention will be described in detail using the drawings.

1 to 5 show an embodiment of a suspension seat according to the present invention.

In the figure, a suspension seat 1 is provided with an upper frame 3 below a seat cushion portion 2. As shown in FIG. On the other hand, a lower frame 5 is provided on the vehicle body floor surface 4 to which the seat cushion portion 2 is attached. Note that these frames 3 and 5 are
It is formed into a frame shape from a metal plate. Also, between these frames 3 and 5, there is an X-link mechanism 6 having a general configuration capable of raising and lowering the seat cushion part 2, and a suspension body 12 which is also a general structure.
is provided. This X-link mechanism 6 is formed by a pair of link members 7 and 8 that are disposed on both the left and right sides of the seat cushion portion 2 and spanned between the frames 3 and 5 in an X-shape. It is an integrated X-link member. Further, one end of each link member 7, 8 is rotatably supported by the upper frame 3 and lower frame 5 via a pivot 9,
The other end is slidably supported in the long hole 3a of the upper frame 3 and the long hole 5a of the lower frame 5 via a pivot 10, respectively. The intermediate portions of the link members 7 and 8 are rotatably coupled to each other via a support shaft member 11. Note that this support shaft member 11 is connected to the pair of link members 7, 8, 7, 8.
Alternatively, it is commonly extended between the X-link members on both sides. Further, a cylindrical member 18 is rotatably attached to the support shaft member 11 between the pair of link members 7, 8, 7, 8 or the X link members on both sides, covering the outer periphery of the support shaft member 11. ing. Further, one end of an elastically deformable plate-shaped spring pressure switching lever 19 is fixed to one end of the cylindrical member 18.
The other end of the bracket 9 extends to the side surface of the upper bracket 3, and a locking member 20 is attached to this extended other end. The locking member 20 is projected from the spring pressure switching lever 19 toward the upper bracket 3 side. on the other hand,
A positioning member 21 is provided on the upper bracket 3 side corresponding to the protruding portion of the locking member 20.
is provided. This positioning member 21 is
Three positioning holes 21a, 2 are scattered in the front and back direction.
1b and 21c are provided, and this positioning hole 2
The locking member 20 can be engaged by selecting one of 1a, 21b, and 21c. In addition, the locking member 2
When switching the engagement position of 0, pull the locking member 20 outward as shown in FIG.
The spring pressure switching lever 19 is flexibly deformed using the fixed part with 8 as a fulcrum, and this deformation pulls it out to the outside of the positioning member 21 and connects it to the positioning holes 21a, 2.
It can be removed from inside 1b and 21c. Further, when the switching lever 19 is rotated in the front-rear direction together with the cylindrical member 18 in this state, the locking member 20 can be selectively engaged with any one of the positioning holes 21a, 21b, and 21c.

On the other hand, a torsion spring 2 is mounted on the cylindrical member 18.
2 are arranged in a coiled manner. This torsion spring 22 is a coil spring of a predetermined length, and is assembled so as to be wound around the outer periphery of the cylindrical member 18 to develop a designed spring pressure. One end 22a of this torsion spring 22 is latched to the lower side of the link member 7 on one side, and the other end 22b is latched to the spring pressure switching lever 19. That is, the torsion springs 22 are respectively latched to the portions sandwiched between the left and right ends of the X-link mechanism 6, and are installed so as not to protrude outward from the left and right ends of the X-link mechanism. The torsion spring 22 applies a biasing force to the X-link mechanism 6 to push up the cushion portion 2. In addition, the biasing force that this torsion spring 22 applies to the X link mechanism 6 is
Positioning hole 21 with which the locking member 20 is engaged
Adjustment can be made by selecting the positions of a, 21b, and 21c. That is, when the torsion spring 22 is engaged with the positioning hole 21a, the torsion spring 22 is wound the most and has the largest biasing force, and as it advances to the positioning holes 21a, 21b, and 21c in sequence, the amount of winding is loosened. Therefore, the biasing force becomes smaller.

Suspension seat 1 configured in this way
Now, the X-link mechanism 6 receives the urging force of the torsion spring 22 adjusted by the spring pressure switching lever 19 via the link member 7. Further, this acting force is converted into an upward acting force by the X-link mechanism 6, and the seat cushion portion 2 is pushed up and displaced by this upward acting force. Then, when the upper frame 3 side is pushed downward due to a load change from the seat cushion section 2 side, the X-link mechanism 6 contracts against the buffering force of the suspension body 12 and the urging force of the torsion spring 22. load fluctuations are absorbed. Further, when the load fluctuation disappears, the seat cushion portion 2 is returned to the balance position of the suspension body 12, and this state is maintained.

Therefore, in the suspension seat 1 configured in this way, the torsion springs 22 are latched to the portions sandwiched between the left and right ends of the X-link mechanism 6, so that the torsion springs 22
will no longer protrude to both the left and right sides of the X-link mechanism 6. This eliminates the need to provide a special space to avoid collision between the torsion spring 22 and the door, so indoor space and the like can be used effectively. Furthermore, since the torsion spring 22 does not protrude from the side surface of the seat 1, the appearance can be improved.

In the above embodiment, the structure applied to a vehicle has been described, but the structure can also be applied to a general seat. Further, although a structure has been described in which the biasing force of the torsion spring 22 can be adjusted and switched by switching the spring pressure switching lever 19, it is not necessarily necessary to switch the biasing force of the torsion spring 22.

[Effects of the invention] As explained above, in the suspension seat according to the invention, unlike the conventional technology such as that disclosed in Japanese Utility Model Application Publication No. 61-161132, coil springs are used as torsion springs in the cylindrical member. Due to the winding arrangement, it is not subject to restrictions such as the length required to increase spring pressure like a torsion bar. In addition, since it is wound around a cylindrical member, a stable arrangement can be obtained, and it can be easily hidden from view from the outside, thereby improving the appearance. Therefore, there is no need to provide a special space to avoid collision between the torsion spring and the door, and thus the indoor space can be used effectively.

In addition, since the X-link member is connected by a common support shaft member and the cylindrical member and the coil spring are disposed coaxially, the spring pressure of the coil spring is can be applied equally to the X-link members on both sides.

[Brief explanation of the drawing]

FIG. 1 is a side view of a suspension seat according to an embodiment of the present invention, FIG. 2 is a perspective view of the main parts of the same suspension seat, FIG. 3 is a vertical cross-sectional side view of the main parts of the above seat, and FIG. The figure is an enlarged front view of the main part of the same sheet as above, and FIG. 5 is a vertical cross-sectional side view taken along the line - in FIG. 4. DESCRIPTION OF SYMBOLS 1... Suspension seat, 2... Seat cushion part, 3... Upper frame, 5... Lower frame, 6... X link mechanism, 7, 8... Link member, 11... Support shaft member, 12 ...Suspension body, 22...Torsion spring (coil spring).

Claims (1)

[Claims for Utility Model Registration] An X-link mechanism is interposed between the upper frame to which the seat cushion is attached and the lower frame attached to the floor side, and an attachment for pushing up the seat cushion. The force is X
In a suspension seat provided with a torsion spring attached to a link mechanism, the X-link mechanism includes X-shaped X-link members disposed on both sides of the upper frame and the lower frame, and the The torsion spring has a common support shaft member that is movably pivoted, and a cylindrical member that is disposed between the X-link members on both sides with the support shaft member inserted therein. 1. A suspension sheet, which is used to wrap around the outer periphery of the cylindrical member, and has both ends hooked to the corresponding X-link member.