JPH0720892U - Seat device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to reduce the weight and to improve the load-deflection characteristics and vibration characteristics, and also to improve the holdability and assembly performance. Provides a seat device which can be configured to add a preload and can eliminate the feeling of crumpling. [Structure] Cushion frame 2 placed on the floor
Support member 1 which has one end engaged with the side and supports the seat pad
A seat device having a torsion bar 3 whose other end is engaged with at least one of the front side and the rear side, and elastically supporting the support member 1 on the cushion frame 2 via the torsion bar 3. The support member 1 is composed of a frame- or panel-shaped support 1a having a bank on both sides and a recessed center, and a spring body including an S spring 1b bridged over the support 1a. Along with
It is characterized in that a torsion bar displacement absorbing mechanism 6 for absorbing the horizontal displacement of the torsion bar 3 during deformation is provided on at least one of the front and rear sides.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seat device in which a support member that supports a seat pad is elastically supported by a torsion bar.

[0002]

[Prior art]

 Conventionally, as a seat device for elastically supporting a support member for supporting a seat pad on a cushion frame by a torsion bar, one disclosed in JP-A-4-200410 is known.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional technique, since a supporting panel having a plurality of laterally extending ribs is used as a supporting member for supporting the seat pad, there is a problem that the weight is heavy. Further, in the above-mentioned conventional technique, since one end of the torsion bar is locked to the cushion frame and the other end is locked to the support panel, when the support panel bends vertically, the torsion bar does not move on the other end side. There is a problem in that it is impossible (cannot absorb the escape in the horizontal direction), which adversely affects the flexural characteristics and vibration characteristics. Further, in the above-mentioned prior art, since at least two torsion bars are provided on at least one of the front side and the rear side of the support panel, the two torsion bars easily interfere with each other when they are assembled and are easy to assemble. There is a problem that is bad. Further, in the above-mentioned prior art, since the lateral shape of the support panel is a straight line (horizontal), the holding performance of the seat surface of the seat cushion is deteriorated and only the seat surface is bent in the lateral direction while leaving the bank portion. There are problems such as pleasant sensations. Further, in the above-mentioned conventional technology, since the initial load (preload) is not applied to the torsion bar, there is also a problem of giving a so-called "compressed feeling" in which the occupant is largely depressed at the beginning of sitting. is there.

The present invention has been made in view of the above circumstances, can achieve weight reduction, and can improve load-deflection characteristics and vibration characteristics, and can improve holdability. At the same time, it is an object of the present invention to provide a seat device capable of improving the assembling property, and further having a structure capable of adding a preload so as to eliminate the feeling of cramping.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a torsion bar having one end engaged with the cushion frame side placed on the floor and the other end engaged with the support member side supporting the seat pad. In a seat device which is provided on at least one of the rear sides and elastically supports the support member on the cushion frame via the torsion bar, the support member is in a state in which a bank portion is on both sides and a center is recessed. Such as a frame-shaped or panel-shaped support body and a spring body composed of an S spring or the like bridged over the support body, and absorbs horizontal displacement when the torsion bar is deformed. The feature is that the mechanism is provided on at least one of the front and rear.

[0006]

[Action]

 With the above structure, the support member is composed of a frame-shaped or panel-shaped support body in which both sides are bank portions and the center is recessed, and a spring body including an S spring or the like bridged over the support body. Since it is configured, it is possible to achieve weight reduction and good holdability. Further, since the torsion bar displacement absorbing mechanism that absorbs the horizontal displacement when the torsion bar is deformed is provided, the flexural characteristics and vibration characteristics can be improved.

[0007]

【Example】

 An embodiment according to the present invention will be described below with reference to the drawings. 1 and 2, the support member 1 is a frame-shaped or panel-shaped support body 1a and an S spring spanned between the support bodies 1a so that both sides are bank portions and the center is recessed. 1b and the wire 1c. In the torsion bar 3 provided between the cushion frame 2 and the support member 1, one end (which is bent to form one side end) 3a is attached to the cushion frame 2 via the torsion bar holding bracket 4. The other end (which is bent to form both ends) 3b is attached to the support member 1 via the torsion bar set bracket 5.

A long hole 6 (see FIGS. 2 and 3) in the front-rear direction is provided at the location of the torsion bar set bracket 5 with which the other end 3b of the torsion bar 3 is engaged, and the torsion hole is provided by the long hole 6. The horizontal displacement of the torsion bar 3 when the bar 3 bends in the vertical direction is absorbed. That is, the elongated hole 6 is an example of the torsion bar displacement absorbing mechanism (this example is referred to as the first embodiment). The torsion bar displacement absorbing mechanism is not limited to the elongated hole 6, but may be a free link 7 (see FIGS. 4 and 5; this example is referred to as a second embodiment). When the free link 7 is used, the preload cannot be added, but when the long hole 6 is used, the preload can be added to the support member 1 when the support member 1 is attached.

Although the S spring 1b may be bridged between the supports 1a of the support member 1, a CTS (coil tension spring, shown by reference numeral 1d in FIG. 6) of the support member 1'where the CTS is bridged. You may do it. Further, the torsion bar 3 is not limited to the use of only one, but two may be used (indicated by reference numeral 9 in FIG. 7). Further, in the type in which the torsion bar 3 is used both on the front side and the rear side, the torsion bar displacement absorbing mechanism does not necessarily have to be provided on both the front and rear sides, and may be provided on only one side. In this case, backlash under load is reduced, but illustration of this example is omitted.

In the above-mentioned structure, if the long hole 6 and the free link 7 are used for supporting the torsion bar 3 on the side of the supporting member 1, the motion of the torsion bar becomes smooth, and the vibration characteristics as shown in FIG. (Transmissivity-frequency characteristic) is obtained. In FIG. 8, the curve a shows the characteristics of the conventional product, the curve b shows the characteristics of the first embodiment, and the curve c shows the characteristics of the second embodiment. As can be seen from the vibration characteristics, according to the present invention, it is possible to suppress the vertical vibration of 6H _Z is said to human discomfort (Hertz) low. Furthermore, since the soil hand portion of the support member can be eliminated adverse effects on the vibration characteristics, the vibration characteristics for conventional products (JP-A-4 of JP -200410 ones), to lower the transfer rate of more 6H _Z Wear.

FIG. 9 is a load-deflection characteristic diagram, but comparing Example 1 (shown by curve d) and Example 2 (shown by curve e) with the conventional product (shown by curve f), The load-deflection characteristic curve can be made close to a straight line, and the characteristics can be made excellent. In addition, in Example 1, since the preload can be added, it is possible to eliminate the "crumpling". In addition, in a support body as a support member for supporting the seat pad, a bank portion is provided so that the center is recessed, and the support member is a spring body such as an S spring spanned by the support body and the support body. Since it is composed of and, by increasing the rigidity of the side part, it is possible to eliminate the "feeling of stickiness", improve the holding performance, and also reduce the weight. Also, since it is possible to support one torsion bar both on the front and rear, the workability of assembly can be improved.

[0012]

[Effect of device]

 As described above, according to the present invention, the weight can be reduced, and the load-deflection characteristic and the vibration characteristic can be improved, and the holding property and the assembling property can be improved. In addition, a preload can be added to eliminate the squeaky feeling, resulting in an extremely excellent product.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment according to the present invention.

FIG. 2 is a side view of the first embodiment according to the present invention.

FIG. 3 is a side view of an essential part of the first embodiment according to the present invention.

FIG. 4 is a side view of a second embodiment according to the present invention.

FIG. 5 is a side view of an essential part of a second embodiment according to the present invention.

FIG. 6 is a perspective view of another embodiment of a support member according to the present invention.

FIG. 7 is a perspective view of another embodiment of the torsion bar according to the present invention.

FIG. 8 is a diagram showing vibration characteristics of the seat device according to the present invention.

FIG. 9 is a diagram showing a load-deflection characteristic of the seat device according to the present invention.

[Explanation of symbols]

 1 Support Member 1a Support 1b S Spring (Spring Body) 2 Cushion Frame 3 Torsion Bar 4 Torsion Bar Holding Bracket 5 Torsion Bar Set Bracket 6 Oblong Hole (Torsion Bar Displacement Absorption Mechanism) 7 Free Link (Torsion Bar Displacement Absorption Mechanism)

Claims (1)

[Scope of utility model registration request] 1. A torsion bar, one end of which is engaged with a cushion frame side mounted on a floor and the other end of which is engaged with a support member side for supporting a seat pad, on at least one of a front side and a rear side. In a seat device in which the support member is elastically supported on the cushion frame via the torsion bar, the support member has a frame-like shape or a panel-like shape in which both sides are bank portions and the center is recessed. A torsion bar displacement absorbing mechanism for absorbing horizontal displacement during deformation of the torsion bar is provided on at least one of the front and rear sides while being composed of a support and a spring body such as an S spring that is bridged over the support. A seat device characterized by the above.