DE7730006U1 - DEVICE FOR ADJUSTING THE HEIGHT OF THE SEAT ON A SWIVEL CHAIR - Google Patents

Description

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Fehlbaum & Co, Goetheanumstr. 18, CH-4143 Dornach

The present innovation relates to a device for adjusting the seat height one after the other Preamble of claim 1 designed swivel chair.

With a gas spring as a suspension and height adjustment element equipped swivel chairs, it is common to use the end of the gas spring containing the actuating bolt to form the housing as an outer cone over the actuating bolt protrudes and for the direct reception of the seat plate connection, which has a corresponding conical bore.

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partly serves. Manufacturing tolerances on both the outer cone the gas spring as well as the conical bore lead to differences in distance between the stop surface on the said actuating bolt and the actual point of application of the actuating mechanism of the gas spring, to their

Compensating often difficult to access and / or complicated, components are necessary if they are for aesthetic reasons

should not be clearly visible, or cannot be attached under easily removable casing. In In many cases, for this reason, the position of the operating handle and / or its range of motion was also the same prejudices that an inconvenient location of the same on the Seat underside had to be accepted.

The object of the innovation is a device for adjusting the seat height to a swivel chair to sheep ii fen, wherein the distance differences of the type mentioned in

the chair assembly in a simple way, and also at a later date Repair work can be easily compensated for in an adjustable manner, the adjusting member itself from the outside to Possibility not to be visible.

The solution to this problem according to the innovation results from the characterizing features of the claim

An embodiment of the invention is as follows explained with reference to the drawing. 1 shows a vertical section through the elements

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the seat shell attachment and the upper or actuation side End of a gas spring, and

Fig. 2 in plan view of the columnar or. The end of the seat height adjustment or release lever on the gas spring side in engagement with the head of a lengthwise adjustment

ble connecting link for actuating the gas spring. (Ji In Fig. 1, 1 denotes a seat plate support,

on the top of which the seat plate of a swivel chair is constructed in a manner not shown. Between two of Seat plate carrier 1 at right angles protruding fork pieces 2, 3 is pivotable on a tubular bearing pin Ί stored, the head part 5.1 of a support block 5 is arranged. The support block 5 contains in its lower part 5.2 a conical bore 5-3j which the conical push-on end 6 a gas spring 7 receives. The gas spring 7 is by never ^ the- or inward pressing of an operating button 7.1 in

adjustable in length.

It is easy to see that, depending on the deviations of the actual diameter of the conical plug-on end 6 and the bore 5-3 from their nominal dimensions, the distance between the top 7.1 'of the gas spring actuation button 7-1 and the axis 8 of the bearing pin H varies is. This circumstance complicates the design of a gas spring actuation mechanism that can be conveniently operated from a point located under the seat plate

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should be. In addition, the end of the handle should be this Actuating mechanism even with different fitting relationships between the push-on end 6 of the gas spring 7 and the conical bore 5-3 in the support block 5 in the rest position are always in the same place below the seat plate.

jr The embodiment shown in the Z-jienung

the innovation has for this purpose a release lever 9, which by means of a in the longitudinal bore h. 1 of the tubular bearing journal 4 is pressed-spherical bearing 10 a resiliently-elastic plastic and a pivot pin 11 to the seat bracket of the parts 1, ¹ I ₃ 5 connected from eg. The (inner) end of the release lever 9 shown to the right of the pivot pin opens into a coupling section 12 which is flattened on both sides and which, on the other hand, into a groove 13 in the bolt head 14.1 of an

set screw bolt I ¹ J engages. In the rest position of the release lever 9, the upper side 12.1 of the flat surface 12 rests at the culmination point of the bore 4.1 in the bearing journal 4.

The adjusting screw bolt I ¹ J is screwed over part of its length into the threaded bore of an adjusting cylinder 15, which is slidably mounted in the interior of the push-on end 6 of the gas spring 7. The adjusting cylinder 15 carries on its ..? M at the bottom on the

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EI *

t C I

Actuating button 7.1 aligned centering member in the form of a peg-shaped extension l6 and is secured against rotation by means of a pin 17, which engages slidably in a longitudinal slot [ 18 in the conical push-on end 6 of the gas spring.

When assembling the chair seat or the seat plate holder, the procedure is preferably as follows: Before inserting the gas spring provided with the complete adjusting cylinder 15 into the seat plate holder already equipped with the release lever 9 - parts 1, 4, 5 r, the screw I ^ is so far unscrewed from the threaded hole in the cylinder 15 that the bottom of the groove 13 in the bolt head I ¹ I.! is roughly at the level of the expected level. The seat plate holder is then loosely placed on the conical push-on end 6 of the gas spring 7 in such a way that the coupling section (flat surface) 12 of the release lever 9 fits into the groove 13 in the bolt head IiJ. 1 intervenes. In this assembly state, the above-mentioned conical surfaces should not yet touch one another. Now you turn the gas spring in one direction or the other until the conical surfaces lie snugly on top of one another. The release device is now pre-adjusted. Before the seat surface holder is knocked on the gas spring, the bolt is turned back about one turn in the cylinder 15, depending on the desired operating play, by the amount when the cone sections are pushed into one another

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till

■ e ■ »ι ι ι

to compensate for any shortening of the structure. The A- ; keeping a (minimal) remaining game is important to

j. make sure that the

i gas spring actuation button 7.1 takes place. ·

, 5 .. This way the gas spring can be easy

\ you in a fully boarded seat plate holder

\, tion with a correctly set operating clearance

can be used.

j It goes without saying that the anti-twist device between

i see the adjusting cylinder 15 or another, whose up-

1 would be a fulfilling component, and the gas spring 7 with others

I means as a pin 17 guided in the slot 18

I can be asked. Likewise, it is not necessary that

! for coupling the release lever 9 or its end 12

with a setting screw a groove engagement of the shown ^ th type is provided. For example, the end can

of the release lever is fork-shaped, and the bolt

:. head 1 * 1.1 as a cutting edge engaging in the fork or

■ rib to be designed.

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Claims (4)

• t · · Dr. HEINZ FEDER *. ^: ! ·· ". ·: I '..:'. ' . ' Dr. WHERE FD. SPRING.:.."..· '.-' ·. * ' ^: Pa contemplated
Fischerstrasse 45 _ η ι - Düsseldorf 30 Protection claims [1.1 Device for adjusting the seat height on a swivel chair with a central column that can be telescopically lengthened or shortened by a gas spring, in which the actuation-side end of the gas spring is provided with a tubular receiving cone coaxially formed on this for placing a seat plate holder, which holder opens a gas spring actuation button and downwardly moving release lever that is pivotable about a pivot point on the holder is provided, the end of which on the gas spring side carries a coupling member, characterized in that,
- that between the gas spring actuating button (7 x 1) and the coupling member mentioned (12) with this rotationally meshing the first part (14) of adjustable length r a connecting device (14, 15), and one engaged with the gas spring actuation button standing, inside the tubular receiving cone (6) built-in and twist-proof connected to this two- ! 20 th part (15) of the length adjustable connecting devices ] direction is arranged, and - That the first and second part of this device over a screw-nut thread in engagement with one another stand. ' 2. Device according to claim 1, characterized 7730006 01/12/78 - A2 - draws that the first part of the adjustable-length connecting device with a coupling portion (13) for receiving the coupling member (12) on the release lever (9) provided screw bolt (14). 3 · Device according to claim 2, characterized in that the coupling section on the screw bolt (14) a diametrically extending groove (13) in the bolt head (14.1), and the coupling member (12) essentially one rectangular, vertically oriented surface on the gas spring-side end of the release lever (9). 4. Device according to claim 2, characterized in that the coupling section on the screw bolt (14) is a cutting edge or rib which runs diametrically over the bolt head and which is shaped like a fork Coupling member engages at the end of the release lever (9) on the gas spring side. 5. Device according to claim 1, characterized in that that the second part of the adjustable-length connecting device with an axial threaded hole provided adjusting cylinder (15) with a on the Centering link aligned with the gas spring actuation button (7.1) (16), and that to prevent rotation against the receiving cone (6) of the gas spring * (7.) one over the cylinder surface protruding pin (17) is present, v / elcher 7730006 12.0178 - A3 - engages in a longitudinal slot (18) in the receiving cone and can be moved in it.