JPH07505546A - 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 includes a seat retainer and a seating plate pivotably held by the seat retainer. and a seating plate attached to the seat retainer and extending substantially vertically to the backrest. and a spring for elastically positioning the chair. The seated play 1 is supported by a spring at its free end.

A chair of this construction has a seating plate that pivots upward and a back that pivots forward. Thus, while supporting the user in a vertical position, it also maintains its own tilt when tipped backwards. An elastic seat plate and an elastic back that change the position of the user when the user falls backwards. It is possible to support.

Typically, springs are used to support the seating plate and back, and the The plate and back allow only a linear increase in biasing force and A pneumatic spring acting at a point or a flat spring with the same characteristics along its entire length. Metal springs are used and are needed to tilt the back and seat plate It is not possible to adjust the force precisely.

If you want different spring characteristics while tilting the chair, a complex mechanism, e.g. , it is necessary to use an elbow lever.

The aim of the invention is, on the one hand, to enable individually adapted spring behavior and, on the other hand, to is to improve a common type of chair so that it is as easy to manufacture as possible. Ru.

This object is achieved according to the invention for a chair of the type described at the beginning, A spring is a flat spring made of fiber-reinforced synthetic material; the seat plate extends substantially horizontally from the fixed point of the seat retainer under the seating plate and Directed substantially vertically upward at the rear end of the plate, the stiffness of the spring Varies from section to section along the length.

Fiber-reinforced synthetic material springs can be used to create large volumes in small volumes. It has the advantage of constructing simple and very light components capable of generating significant holding forces. be. In particular, the stiffness of springs includes bending stiffness as well. , are adapted differently depending on the part, so for example the support area of the seating plate Other forces lead the backrest area to deform in the same way. This allows you to simply By using only one spring needed for each individual part of the chair Individual adaptation of the biasing force becomes possible.

In a preferred embodiment, the spring has varying widths along its length, and have different stiffness parts because the wider area has greater stiffness. .

In other embodiments, the spring has varying thicknesses along its length, and thus It has different stiffness parts.

Additionally, the spring may have different fiber content along its length, or The oriented fiber is embedded in the spring along its length. It is also possible to create sections of different stiffness.

Each special method for obtaining different stiffness from section to section along the length is unique. used stand-alone or in combination as desired.

It is particularly advantageous if the spring has a multi-layer construction, so that on the one hand it can have a variety of different stiffnesses. When applying too much load that would cause breakage on the other side, the spring This prevents the plug from suddenly breaking.

In a preferred embodiment, the spring adjacent the fixed point (i.e., substantially linearly extending and then changing into a substantially curved-shaped portion extending beyond 90°; A straight section with an adjacent slightly oppositely curved area where the backrest is held. become. On the one hand, a spring of this shape requires only a small space, on the other hand The seating plate has the desired deformation and movement characteristics in the back movement as well as the It has been demonstrated that the motion of the patient is accommodated in a desirable manner.

The strength value of the spring is determined by the direction of the free end in the unloaded and maximum by approximately 15° to 19° under heavy load, preferably 18°, selected differently.

Springs are particularly advantageous when made of glass fiber reinforced plastic; Basically it is possible by using multilayer wood springs, for example, The layers consist of different types of wood, at least in parts.

It is particularly advantageous when the seating plate has two parts, the front part of which has two parts. when the seating plate portions of the are pivotally connected to each other, and the forward and rearward Seat holding when each seating plate is supported by a spring via a support member The support member of the forward seating plate portion is pivotally attached to the front seat plate portion. Preferably located at the trailing edge. Therefore, on the one hand, when the user tilts backwards, the front The slope of the seat plate part is inevitably changed, and at the same time the rear seat plate becomes stronger. tilted, the rear seating plate forms a support wedge while the user tilts forward, and It is pivoted into the plane of the front seating plate when the user tilts it backwards.

In other embodiments, the seating plate has two parts, the front part holding the seat. The rear seating plate portion is rigidly connected to the front seating plate portion. Pivotably connected and supported on the bridge via a support member. like this In some configurations, only the rear seating plate portion is pivotably arranged and while the front seating plate portion remains unchanged. be. Since this is a simple structure, the manufacturing cost is almost low.

In a further embodiment, the seating plate is a single piece and is spun through the support member. supported by a ring. In this case, the entire seating plate is pivotable and the user It tilts in response to tilting backwards.

The spring has an advantage when it comes into contact with the restraining surface of the seat holder at its highest position. be. Therefore, install a spring with upward force and start tilting it backwards. It is already possible for users to work against certain resilience forces, and each This ensures that users feel well supported.

The following description of a preferred embodiment of the invention, together with the drawings, explains the invention in detail. explain.

FIG. 1 shows the components of a chair according to a first preferred embodiment in an untilted position; shows a longitudinal cross-section of the minute.

Figure 2 shows 7 the chair of Figure 1 in a rearwardly tilted position.

[(3 is the stroke at different spring positions and different spring lengths) Figure 2 shows a schematic side view of the chair of Figure 1 showing a cross-section of the pulling;

Figure 4 shows the non-pivotable front seating plate section and the pivotable rear seating brake section F. FIG. 2 is a view similar to FIG. 1 of another preferred embodiment of the chair having a sectional view;

FIG. 5 is a view similar to FIG. 1 of another preferred embodiment with a single-piece seating plate; It shows.

The chair shown has a seat holder rotatably held on legs not shown. l, the seat retaining part terminating at the top end of the arm 2 extending substantially horizontally. End.

In the front part of the arm part 2, one end part of the flat spring 4 is rigidly attached to the horizontal holding part 3. and along a certain length of the horizontal holding part 3 relative to the sheet holding part l. held motionless.

The flat spring 4 extends in the region of the seat holder 1 parallel to the top side and The rear end of the holding part 1 contacts the top horizontal stop surface 5 in an undeformed state. Ru.

Once past the seat holder 1, the flat spring 4 is substantially bent into a curved shape. The angle of bending is slightly more than 90°, for example 10°. substantially The region 7 which is guided vertically upwards and bent slightly in the opposite direction forms this curved part. The backrest 18, adjacent to 6 and indicated only by the broken line in FIG. 3, is located in this area. Retained.

The flat spring 4 is made of fiber composite material, for example glass fiber reinforced plastic. made of wood or wood. Preferably, the flat spring is composed of multiple layers. In particular, its different layers can have different fiber contents. construction When using wood as material, flat springs are thin springs made of different types of wood. - uniform structure, and also distinguishes the wood type of the individual layers along the length of the flat spring. You can also change it to .

The stiffness of the flat spring varies in the longitudinal direction. Furthermore, it is clear from Figure 3. For smoothness, the width of the flat springs can be varied, either simultaneously or selectively. As can be selected, flat springs of different thicknesses can be selected (FIG. 3). Therefore As a result, in both cases, by changing the cross section of the flat spring , will be in different parts along the flat spring.

The fiber content can be selected or even varied in the longitudinal direction; Different force impositions of bars are used. As a result of both effects, the stiffness Different along the ring.

In the embodiment of FIGS. 1 and 2, the front part 8 of the two-part seating plate 1/- 9 is pivotably attached to the seat holder l in the area of the horizontal holder 3 and The seat plate is supported at its rear edge by a flat spring 4 via a support member 10. held. For this purpose, the support part) 110 projects through the recess 11 of the stop surface 5. .

The rear part 12 of the seating plate 9 pivots on the rear edge of the front part 8 of the seating plate 9. Possibly attached and also via a further support member 13 to the flat spring 4 Supported.

When the chair is not under load, the front part 8 of the seating plate 9 holds the seat. pivoted slightly upwardly relative to the top edge of section l, while the rear section 12 and the front section The dimensions are so that the angle with 8 is between 12° and 16°, for example 14°. selected.

When the flat spring is fully bent back, the two parts 8 and 12 on the one hand The rear part 12 is pivoted relative to the front part 8 so as to be in one plane, and also on one side. Then, the rear edge of the front part 8 and the front edge of the rear part 12 are slightly different from each other. lowered (Figure 2). The seating plate is generally flat to some extent and is one part. rate is obtained and the slope towards the back is the unloaded front part of the chair. Slightly greater than the slope of 8.

When the flat spring is deformed, the backrest 18 is simultaneously moved to the vertical position (FIG. 3). and tilted to a rearwardly pivoted position not shown in the drawings.

As is clear from comparing FIGS. 1 and 2, the flat spring 4 has different lengths. It can be seen that the area is deformed differently depending on the region.

The flat spring 4 is connected to the curved portion 6 between the horizontal holding portion 3 and the curved portion 6. Having opposite curvatures, the way the supporting members lO and 13 descend are very different. . The amount of descent of the front support member 10 is considerably less than the amount of descent of the rear support member 13. . The degree of deformation of the flat spring at different parts along the flat spring is mentioned. Different deformation characteristics can be accommodated by appropriate selection of materials as It is possible to easily manufacture a chair with flat springs. The only difference is that. You can also use these flat chairs when other chair features are desired It is also possible to easily replace the spring. Therefore, for example, While conference chairs can only tilt backwards against relatively large resistance, conference chairs For children, it is desirable that backward tilting is already possible with relatively low forces.

Nevertheless, in this regard, the tilting feature of the seating plate may be affected by e.g. The properties can be chosen to be the same at the same time in the front area of the flat spring. It is possible.

In the embodiment of FIG. 4, where identical parts are designated with the same reference numerals, the seating plate 9 The front part 8 of is rigidly connected to the seat holder 1. Furthermore, the front support member 10 is excluded. In this configuration, only the rear portion 12 of the seating plate 9 is pivoted. Furthermore, the structure of the chair is the same.

Also, in the embodiment of FIG. 5, identical parts are designated by the same reference numerals. Part 9 consists of a single part. This single-piece seating plate 9 supports the flat spring 4. It is supported only via one support member 10. Therefore, the second support member 13 is excluded. has been done. In this chair, the entire seating plate is a deformation of the flat spring. Pivoted.

The pivoting in the front and rear portions of the seating plate is not different. Otherwise, The chair is constructed similarly to the embodiment of FIGS. 1 and 2.

PCT/EP　931006311

Claims (14)

[Claims] 1. a seat holding part; a seating plate pivotally held by the seat holding part; attached to the seat holder and causing the backrest to substantially hang from the seating plate; and a spring that is elastically disposed directly on the chair, the seating plate being In a chair supported by the spring at its free end, The spring (4) is connected to the seat holding part (1) under the seating plate (9). ) extending substantially horizontally from the fixing point (holding part 3) of said seating plate (9). A flat plate of fiber-reinforced synthetic material directed substantially vertically upward at the rear end. a spring, the stiffness of which spring (4) varies by section along its length. A chair with different characteristics. 2. Said spring (4) has different widths along its length and therefore different widths. A chair according to claim 1, characterized in that it has a rigid portion. 3. Said spring (4) has different thicknesses along its length and therefore has different thicknesses. 3. A chair according to claim 1 or claim 2, characterized in that it has a rigid portion. 4. Said spring (4) has different fiber content along its length. , thus having parts of different stiffness. The chair on the table. 5. Said spring (4) has fibers oriented differently along its length. according to the preceding claim, characterized in that it has parts of different stiffness. Any of the chairs listed. 6. Any of the preceding claims, characterized in that the spring (4) has a multilayer structure. A chair mentioned in the above. 7. said spring (4) adjacent said fixation point (3) extending substantially linearly; , then changes into a substantially curved-shaped portion (6) extending over 90°, where adjoining is a slightly oppositely curved area (7), said backrest (18) being A chair according to any of the preceding claims, characterized in that it is held in said area. 8. The strength value of the spring (4) is such that the direction of the free end is under load. Approximately 15° to 19° when unloaded and fully loaded according to any of the preceding claims, characterized in that the Chair. 9. The spring (4) is made of glass fiber reinforced plastic. A chair according to any of the preceding claims, characterized in that it is characterized by: 10. The seating plate (9) has two parts, the front part (8) is pivotally attached to the seat holder (1) and is attached to the two seating plates. portions (8, 12) are pivotally connected with respect to each other and said front and rear seating plates Each rate portion (8 or 12) is connected to the said spring via a support member (10, 13). Chair according to any of the preceding claims, characterized in that it is supported by a ring (4). 11. The support member (10) of the front seating plate portion (8) is located at the rear edge of the front seating plate portion (8). The chair according to claim 10, characterized in that it is arranged. 12. Said seating plate (9) has two parts, the front part (8) of which The rear seating plate portion (12) is rigidly connected to the seat holding portion (1). pivotally connected to said front seating plate portion (8) and having a support member (13); Claims 1 to 3, characterized in that the spring is supported by the spring (4) through the spring. 9. The chair according to any one of 9. 13. Said seating plate (9) consists of a single piece and is connected via a support member (13). The method according to any one of claims 1 to 9, characterized in that it is supported by the spring (4). Chairs listed in any of the above. 14. The spring (4) is attached to the seat holding part (1) at its highest position. ), the chair according to any of the preceding claims, characterized in that it abuts against a restraining surface (5) of the Child.