JPH07505545A - Chair - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Chair The present invention is a chair having a seat carrier which is oriented horizontally rearward and which In one example, a bent leaf spring is fixedly mounted on the seat carrier and A seat plate rotatably mounted on the carrier is supported on the above-mentioned spring, and the backrest is It relates to a chair held on a spring as described above.

This type of chair must be suitable for users of different weights, i.e. , the springs that enable the tilting movement of the seat plate and backrest have various stiffnesses. like! It is essential that Section J be followed. When using leaf springs, is only possible when the leaf spring is replaced.

An object of the present invention is to provide a seat plate and a seat plate without replacing a temporary spring when using a leaf spring. Developed a general-purpose chair in which the tilting force of the backrest can be changed. It's about doing.

According to the invention, this object is achieved in a chair of the type mentioned at the outset, by providing a support for the leaf springs. A holding part is mounted on the seat carrier, and this support part is attached to a leaf spring adjacent to the fixing part. Achieved by being able to move parallel to the part to various distances from the fixed part be done.

Usually, the false spring can be freely deformed outside the fixation site, resulting in a leaf spring The entire length of is made available for spring movement from the fixed site. Support for leaf springs This possibility of movement of the leaf spring is limited by providing a In the region of , the spring remains more or less undeformed. In other words, the self of the spring This limits the effective length of the deformable area. One fixed part and the other supporting part By adjusting the distance between the springs, the effective length of the spring is changed, so that this In this way, the rigidity of the spring can be adjusted at the same time. This adjustment can be done stepwise or continuously.

The abovementioned support is mounted in a guide extending parallel to the false spring on the seat carrier. Preferably, the shaft is These guides are, for example, elongated slits. Something can happen.

In a particularly preferred embodiment, the leaf spring is made of a fiber composite material and the stiffness of the temporary spring is varies along the length of the leaf spring. In this way, the spring tension of the temporary spring can be adjusted under various conditions. For example, the seat plate can be pushed upwards or the backrest can be adapted to It is possible to adapt the spring tension of the leaf spring to different restoring forces pushing forward force 4. be. In this way, together with the movable support, the force distribution of the restoring force of the spring can be adjusted as desired. It is possible to adjust as follows.

In this regard, the stiffness of the temporary springs may be used alone or in combination with each other. can be varied within individual regions by various means. That is, an example for example, by varying the cross-section by different widths or different thicknesses, or by by varying the fiber content or orientation of the fibers within the composite material or the laminate. Using multiple layers with different stiffness properties combined to form By ≠, the stiffness of the leaf spring can be varied within the individual regions.

In a preferred embodiment, the above-mentioned supports are arranged such that when the supports are moved fully rearward, to such an extent that the temporary spring section pointing horizontally backwards is supported almost immovably. It is movable in the direction away from the fixed site.

The following description of preferred embodiments of the invention, together with the drawings, explains the invention in more detail. Helpful to explain. This drawing shows a chair with movable supports for leaf springs FIG.

The chair shown in the drawings comprises a seat carrier 1 carried on legs not shown.

This seat carrier ends at its top end in a more or less horizontal arm 2, which The arm 2 has at its front end a holder 3 for a leaf spring 4. This spring is the holding part 3 to region 5 approximately parallel to the top edge of arm 2, region 5 being curved. The area 6 is oriented upward in shape and is oriented vertically upward. Continued from 5.

The backrest 7, represented by dash-dotted lines in the drawing, is kept in this area. This seat The plate 8 comprises two partial plates, namely a front partial plate 9 and a rear partial plate 10. both Part plates 9 and 10 are pivotably connected to each other along their edges.

In this pivotable connection area between the two part plates 9 and 10, these parts The plates 9, 10 are supported on the leaf spring 4 via a support 11, with a further support 12 at the rear. Both supports 11 and 12 arranged between the partial plate 10 and the leaf spring 4 carry the seat. Projecting through a recess 13 or 14 in the horizontal contact surface 15 of the body 1, the leaf spring 4 is in an unformed state, under a bias if necessary and comes into contact with the lower surface of the contact surface 15. −The front part when the leaf spring is not deformed. The plate 9 forms a slight angle of the amount of a few degrees with the seat carrier 1, while the rear part plate 10 relative to the seat carrier 1 and relative to the front part plate 9, for example by an amount of at most 15° Both supports are selected such that they are pivoted upwards through an angle having . figure This undeformed position is shown on the surface.

An elongated guide slit 16 extending parallel to the leaf spring 4 is provided adjacent to the holding part 3 to hold the leaf spring. 4 in the seat carrier 1 and a shaft 17 is provided in these guides on both sides. It is movable in the direction indicated by direction arrow A. not shown in the drawing A device moves this shaft 17 to various positions along the elongated guide slit (46). can be fixed to. In this regard I7, the shaft may be can be movable, and the shaft can be moved at each position along the path of movement. can be fixed to. In this regard, localization n) can be performed, for example, by a clamping mechanism known per se. one On the other hand, localization can be achieved automatically by applying a load to the shaft via a supported temporary spring. It is also possible to achieve this dynamically. Elongated guide at various distances from the holding part 3 Depending on the position of the shaft 17 in the slit 6, the shirt) 17 is placed directly against the bottom surface of the leaf spring 4. An elongated guide slit 16 and and the dimensions of the shaft 17 are determined.

When the chair is loaded, the leaf springs 4 are activated on the one hand via the supports 11 and 12; Due to the weight of the user acting on the body, on the other hand, the leaf spring 4 is freed via the backrest 7. A backward tilt of the user acting on the end causes the leaf spring to deform. the result , this spring bends downward in the area between the holding part and the curved area 5 and further This spring is bent upwards in a region 5 which has a curved shape. Holding part 3 and bay The lowering of the leaf spring 4 in the region between it and the curved region 5 is carried out by an elongated guide slit. Depending on the position of the shirt (shirt) 17 in the kit 16, different magnitudes can be produced for the same load. Show your strength. This is because the freely deformable length of the leaf spring is This is because it changes within this part. In this respect, the stiffness (ri It is possible to change the gidity. Shaft 17 is close to the holding part When placed in a fixed position, the large length of the leaf spring can be freely deformed and the temporary spring On the contrary, when the shaft 17 moves away from the holding part 3, This characteristic hardens when moved.

This adjustability is made from fiber composite materials, e.g. glass fiber reinforced plastics. This is particularly advantageous when using leaf springs. Because these materials are very expensive strength and thus these materials have small structural dimensions and low weight while This is because it is possible to generate the required high stability. I have a leaf spring like this. and the effect of adjusting the effective stiffness of the leaf spring by the above-mentioned movable shaft 17. A particularly simple, reliable, and effective structure can be generated Ru. This structure maximizes the individual adaptation of the spring properties to the various user requirements. Allows to be achieved by simple means.

In another embodiment, the leaf spring 4 is located in a region at a very large distance from the fixation site. The range is preferably supported in a region directly in front of the curved region 5. so that the shaft 17 is movable in the elongated guide slit 16 until be able to. This allows the leaf spring to reach its practical uppermost point in its horizontal region. fixed in position so that lowering of the seat surface and backrest is no longer possible. , only an elastic backward bending of the backrest is possible. In this regard, the backrest It was pseudo-locked so that it could only bounce back (quasi-1o cked) a chair is obtained.

This means that the leaf spring 4 is particularly stiff in the area in front of the curved area 5. and the shaft 17 is pushed back into just this rigid area. This can be achieved in the same way when At this time, the shaft It is not necessary to move the leaf spring 4 to the rigid horizontal area. A short travel route is sufficient. Thus, for example, if a temporary spring is attached to the The shaft 17 is configured to have flexibility between the rigid region and the shaft 17. It may be provided to be movable only within the flexible region. child When , the pseudo A similar locking effect is produced. In other areas, the leaf spring 4 has a more or less free spring movement. movement is possible.

Claims (5)

[Claims] 1. A chair with a seat carrier oriented horizontally rearward and bent upwards. a leaf spring fixedly mounted on one side on the seat carrier; A seat plate rotatably mounted on the carrier is supported on the above spring, and the backrest is placed on top. In a chair held on a spring, A support (17) for the leaf spring (4) is mounted on the seat carrier (1) and part of the fixed part (3) parallel to the part of the leaf spring (4) adjacent to the fixed part (3). A chair characterized by being movable to various distances. 2. The support part (17) is parallel to the leaf spring (4) on the seat support (1). characterized in that it is a shaft mounted in a guide (16) extending into the A chair according to claim 1. 3. Claim 2, characterized in that said guide part (16) is an elongated slit. The chair mentioned. 4. The leaf spring (4) is made of a fiber composite material, and the rigidity of the leaf spring is the same as that of the leaf spring (4). 4) in any one of the preceding claims, characterized in that: The chair mentioned. 5. Said support part (17) has a horizontal direction when said support part is moved completely backwards. In such a range that the part of the leaf spring (4) facing rearward is supported almost immovably. It is characterized by being movable in the direction away from the fixed part (3) until the A chair according to any one of the preceding claims.