DE102016011221B4 - Hard shell chair - Google Patents

Abstract

Hard shell chair (1), with
a) a seat (3) and
b) a backrest (5, 6), which
b1) has a lower backrest part (5) which is located in the lumbar region of the user and is integrally formed on the seat surface (3), and
b2) has an upper backrest part (6) in order to support the back of the user, characterized in that
c) that the upper backrest part (6) is a separate part in addition to the lower backrest part (5), and
d) that the upper backrest part (6) is attached to the lower backrest part (5) by a height adjustment mechanism (7) so that the backrest (5, 6) can be adjusted in height, the height adjustment mechanism
d1) a rail (8) and
d2) has a carriage (10),
d3) wherein the carriage (10) is guided on the rail (8) so as to be vertically displaceable and either
d4) the rail (8) is attached to the front side of the lower backrest part (5) and the slide (10) is attached to the rear side of the upper backrest part (6), or
d5) the rail (8) is fastened to the rear of the upper backrest part (6) and the slide is fastened to the front of the lower back part (5).

Description

The invention relates to a hard shell chair, in particular as a visitor chair.

Such hard shell chairs have been known for a long time, a famous example being the so-called "Plastic Chair" by the designer Charles & Ray Eames. Such hard-shell chairs have a seat and a backrest, which are each designed as a hard-shell. Another famous example of a hard shell chair is the “Series 7” chair by designer Fritz Hansen. These historical hard-shell chairs are also on display in the "Werner Löffler Collection", a private collection of historical seating furniture.

A disadvantage of such hard shell chairs was the lack of adjustability, since the shape of the seat was fixed by the shape of the shell. The lack of height adjustability of the backrest is of particular importance here.

One possible implementation of the adjustability in seating furniture is from the utility model DE 20 2005 019 654 U1 known. This reveals an office chair with a curvature of the backrest that serves as a lumbar support. The curvature of the backrest can be adjusted individually, but the height of the backrest cannot be adjusted.

From the utility model DE 93 13 841 U1 a hard shell chair with a two-part backrest is known, the upper part of the backrest being pivotably connected to the lower part of the backrest. This seating furniture thus also does not reveal any height adjustment of the backrest.

It is also from the Offenlegungsschrift FR 2 931 646 A1 a seating furniture with adjustable head and footrests known, which can be pulled from the drawers located in the seat. A height adjustment of the backrest is not implemented, however.

The disclosure document DE 195 04 542 A1 discloses a chair frame with two support bars extending from bottom to top and inclined to the vertical, a seat and a backrest being attached between the support bars so as to be adjustable in height by means of a holding device. However, this is not a hard shell chair according to the invention in the narrower sense.

The disclosure document U.S. 2,547,455 A discloses a chair with a resilient backrest, which is also adjustable in height. However, this embodiment is not a hard-shell chair according to the invention in the narrower sense either.

The invention is therefore based on the object of creating a correspondingly improved hard shell chair.

This object is achieved by a hard shell chair according to the invention according to the main claim.

The hard shell chair according to the invention initially has, in accordance with the prior art, a seat surface and a backrest which are manufactured in a shell construction, the backrest having a lower backrest part, which is located in the lumbar region of the user and is integrally formed on the seat surface, and a having upper backrest part to support the back of the user.

The hard shell chair according to the invention is distinguished from the prior art in that the backrest is height-adjustable. In the preferred exemplary embodiment of the invention, this means that the backrest can be adjusted in height relative to the seat surface. The invention is therefore to be distinguished from height-adjustable chairs in which the chair as a whole is height-adjustable relative to the ground, as is usually the case, for example, with office swivel chairs with a turnstile.

With regard to the materials of the seat and the backrest, there are various possibilities within the scope of the invention. For example, the seat and / or the backrest can be made of plywood. Alternatively, however, there is the possibility that the seat surface and / or the backrest are made of plastic. In addition, material combinations are possible, such as a seat made of plywood and a backrest made of plastic.

The upper backrest part is a separate component in addition to the lower backrest part. This means that the backrest is not in one piece, but consists of the upper backrest part and the lower backrest part. The upper backrest part is attached to the lower backrest part by a height adjustment mechanism. The height adjustment mechanism enables the upper backrest part to be displaced relative to the lower backrest part.

With regard to the structural implementation of the height adjustment mechanism, which has a rail and a slide, there are various possibilities within the scope of the invention. So the rail can be attached to the front of the lower backrest part, for example with a screw connection, and the additional slide can be attached to the rear of the upper backrest part, for example by means of a screw connection, the slide being guided on the rail in a vertically displaceable manner. This combination of rail and slide therefore enables the upper backrest part to be adjusted in height relative to the lower backrest part. It should be mentioned here that it is alternatively also possible for the rail to be attached to the upper backrest part and the slide to be attached to the lower backrest part.

It should also be mentioned that the mechanical connection between the upper backrest part on the one hand and the lower backrest part on the other hand preferably takes place exclusively through the height adjustment mechanism, i. H. without other supporting structures.

In addition, it should be noted that the height adjustment mechanism is preferably attached in such a way that it is covered by the upper backrest part in every height setting and is thus invisible from the front.

In addition, the hard shell chair according to the invention can also have a headrest, which can also be height-adjustable. For this purpose, a further height adjustment mechanism is preferably provided which connects the upper backrest part to the headrest. This additional height adjustment mechanism can be covered in the assembled state by the upholstery of the upper backrest part so that it is not visible in the finished state and therefore does not disturb the appearance of the hard shell chair.

Furthermore, within the scope of the invention there is also the possibility that the seat surface can be adjusted in the horizontal direction.

For example, the seat surface as a whole can be displaceable in the horizontal direction, for example to the front or to the rear.

However, there is also the possibility that the seat surface can be lengthened or shortened in the horizontal direction. The seat surface can consist of two seat surface parts which together form the seat surface. In this case, one of the seat surface parts can then be displaceable in the horizontal direction, which leads to a corresponding lengthening or shortening of the seat surface.

It should also be noted that the height-adjustable area of the upper backrest part is preferably greater than 2 cm, 5 cm or 10 cm.

Finally, it should also be mentioned that the hard shell chair according to the invention can have various bases, such as a cantilever base frame, a chair leg base frame or a turnstile. Such underframes are known per se from the prior art and therefore do not need to be described in more detail.

• 1 eine Perspektivansicht eines erfindungsgemäßen Hartschalenstuhls mit einer höhenverstellbaren Rückenlehne,
• 2 die Perspektivansicht aus 1, wobei zusätzlich die verdeckten Bauteile des Höhenverstellmechanismus' mit gestrichelten Linien eingezeichnet sind,
• 3 eine Abwandlung des Ausführungsbeispiels gemäß den 1 und 2, sowie
• 4 eine vereinfachte Perspektivansicht eines Hartschalenstuhls mit einer zusätzlichen Kopfstütze.

Other advantageous developments of the invention are characterized in the subclaims or are explained in more detail below together with the description of the preferred exemplary embodiment of the invention with reference to the figures. Show it:

• 1 a perspective view of a hard shell chair according to the invention with a height-adjustable backrest,
• 2 the perspective view 1 , whereby the hidden components of the height adjustment mechanism are also drawn in with dashed lines,
• 3 a modification of the embodiment according to FIGS 1 and 2 , as
• 4th a simplified perspective view of a hard shell chair with an additional headrest.

The drawings show a hard shell chair according to the invention 1 that can be used as a visitor chair, for example.

The hard shell chair 1 initially has a conventional base 2 with chair legs up. Instead of the base 2 However, other bases can also be used with chair legs, such as a cantilever base or a turnstile.

In addition, the hard shell chair 1 a seat 3 on that numerous ventilation holes 4th contains that over the seat 3 are arranged distributed.

The seat 3 consists in this embodiment of multilayer plywood, which is known per se from the prior art and therefore does not need to be described in more detail.

In addition, the hard shell chair 1 a lower backrest part 5 on, the one piece to the seat 3 is formed and also consists of multi-layer plywood. The lower backrest part 5 covers the lumbar area of the user.

The hard shell chair according to the invention also comprises 1 an upper backrest part 6th , which supports the user's back when used and is also made of plywood.

The upper part of the backrest 6th is here by means of a height adjustment mechanism 7th with the lower backrest part 5 connected so that the upper backrest part 6th relative to the lower backrest part 5 is displaceable in the direction of the double arrow.

The height adjustment mechanism 7th first has a rail 8th on that by fastening screws 9 on the front of the lower part of the backrest 5 is attached.

The height adjustment mechanism also includes 7th a sledge 10 that by fastening screws 11 on the back of the upper part of the backrest 6th is attached.

The sled 10 on the upper backrest part 6th can be moved in the rail 8th of the lower part of the backrest 5 out what the desired height adjustability of the upper backrest part 6th enables.

It should also be mentioned that in this exemplary embodiment in the upper backrest part 6th Ventilation holes 12th and in the lower backrest part 5 Ventilation holes 13th are arranged.

Finally, it should be noted that the seat 3 , the lower backrest part 5 and / or the upper backrest part 6th can be padded.

The embodiment according to 3 largely corresponds to the exemplary embodiment described above, so that reference is made to the above description to avoid repetition, the same reference symbols being used for corresponding details.

A special feature of this embodiment is that the height adjustment mechanism 7th from the upper backrest part 6th is completely covered in every height setting of the upper backrest part 6th . This has the advantage that the height adjustment mechanism 7th is not visible from the front and therefore the optical impression of the hard shell chair 1 also not bother.

The embodiment according to 4th partially corresponds to the exemplary embodiments described above, so that reference is made to the above description to avoid repetition, the same reference symbols being used for corresponding details.

A special feature of this embodiment is that on the upper backrest part 6th a headrest 14th is attached by means of a height adjustment mechanism, which consists of a fixed guide rail 15th and a sliding slide rail 16 consists.

The invention is not restricted to the preferred exemplary embodiment described above. Rather, the invention also encompasses a large number of variants and modifications which also make use of the inventive concept and therefore fall within the scope of protection. In particular, the invention also claims protection for the subject matter and features of the subclaims regardless of the claims referred to in each case.

List of reference symbols

1

Hard shell chair

2

Base with chair legs

3

Seat

4th

Ventilation holes in the seat

5

Lower backrest part

6th

Upper backrest part

7th

Height adjustment mechanism

8th

Rail on the lower part of the backrest

9

Fastening screws for fastening the rail to the lower backrest part

10

Slide on the upper part of the backrest

11

Fastening screws for fastening the slide to the upper part of the backrest

12th

Ventilation holes in the upper backrest part

13th

Ventilation holes in the lower backrest part

14th

headrest

15th

Guide rail

16

Slide rail

Claims (8)

Hard shell chair (1), with a) a seat (3) and b) a backrest (5, 6), which b1) has a lower backrest part (5) which is located in the lumbar region of the user and is integral with the seat (3) is molded on, and b2) has an upper backrest part (6) in order to support the back of the user, characterized in that c) that the upper backrest part (6) is a separate part in addition to the lower backrest part (5), and d) that the upper backrest part (6) is attached to the lower backrest part (5) by a height adjustment mechanism (7) so that the backrest (5, 6) is height-adjustable, the height-adjusting mechanism d1) having a rail (8) and d2) a slide (10), d3) the slide (10) being guided in a height-adjustable manner on the rail (8) and either d4 ) the rail (8) is attached to the front of the lower backrest part (5) and the slide (10) is attached to the rear of the upper back part (6), or d5) the rail (8) to the rear of the upper backrest part (6) and the carriage is attached to the front of the lower back part (5). Hard shell chair (1) Claim 1 , characterized in that the seat (3) and / or the backrest (5, 6) consist of multi-layer plywood or plastic. Hard shell chair (1) according to one of the preceding claims, characterized in that a) that the upper backrest part (6) is connected to the lower backrest part (5) exclusively by the height adjustment mechanism (7), and / or b) that the height adjustment mechanism (7) is covered in the entire height adjustment range of the upper backrest part and is therefore invisible from the front. Hard shell chair (1) according to one of the preceding claims, characterized by a height adjustment range of the upper backrest part (6) of at least 2 cm, 5 cm or 10 cm. Hard shell chair (1) according to one of the preceding claims, characterized in that a) that the seat surface (3) and the backrest (5, 6) are self-supporting without an additional support frame, and / or b) that the seat surface (3) is designed as a seat shell is, and / or c) that the upper backrest part (6) is designed as a shell part. Hard shell chair (1) according to one of the preceding claims, characterized in that a) that a headrest (14) is attached to the backrest, and / or b) that the headrest (14) is height-adjustable, and / or c) that the headrest ( 14) is attached to the upper backrest part (6). Hard shell chair (1) according to one of the preceding claims, characterized in a) that the seat surface is horizontally displaceable, and / or b) that the seat surface has two seat surface parts which together form the seat surface, with at least one of the seat surface parts being horizontally displaceable by to lengthen or shorten the seat. Hard shell chair (1) according to one of the preceding claims, characterized by the following underframe (2): a) a cantilever underframe, b) a chair leg underframe (2) or c) a turnstile.

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