WO2022258418A1

WO2022258418A1 - Height-adjustable table

Info

Publication number: WO2022258418A1
Application number: PCT/EP2022/064601
Authority: WO
Inventors: Thomas Schneider; Kurt Leute; Ulrich Schneider
Original assignee: Leitz Acco Brands Gmbh & Co Kg
Priority date: 2021-06-11
Filing date: 2022-05-30
Publication date: 2022-12-15
Also published as: DE102021115102A1

Abstract

The invention relates to a height-adjustable table, in particular in the form of a desk attachment (10), comprising a table top (16) and two table legs (20, 22) pivotally fastened at their first ends (24, 28) to the table top (16), which table legs are each provided at their free second ends (34, 36) with a table foot (38, 40) for placing on a placement surface (14), in particular on a desk top; wherein at least a first of the table legs (20) can be pivoted with respect to the table top (16) by means of a first joint (26) that is linearly movably mounted on an underside (18) of the table top (16); wherein the table legs (20, 22) are interconnected in a scissors-like manner at a connection point (42) situated at a distance from the first ends (34, 28) of the table legs and at a distance from the second ends (34, 36) of the table legs; and wherein a gas spring (46) is situated on the underside (18) of the table top (16), the first end (48) of which gas spring is connected to the table top (16) and the second end (50) of which gas spring is connected to the first table leg (20), and the spring force of which gas spring forces the first ends (24, 28) of the table legs (20, 22) towards one another. According to the invention, a torsion spring (56) is provided, which is situated in the region of the connection point (42), wherein one leg (58, 60) of the torsion spring (56) is supported on the first and on the second table leg (20, 22), respectively, and the spring force thereof forces the second ends (34, 36) of the table legs (20, 22) away from the table top (16).

Description

Height adjustable table

The invention relates to a height-adjustable table according to the preamble of claim 1.

Such height-adjustable tables, which are mostly used as desk tops, are used, for example, to set up devices such as a computer screen and a keyboard so that they are arranged in a height-adjustable manner. A user can then work, for example, while sitting or standing, without the entire desk having to be height-adjustable. In order not to have to raise the entire resting weight on the table top when the desk attachment is raised, a gas pressure spring is provided, the spring force of which urges the first ends of the table legs hinged to the table top to the one upon the other. Due to the scissor-like connection of the two table legs approximately in the middle, a movement of the first ends towards one another results in a height increase of the desk attachment. The first end of both table legs does not have to be moved. A relative movement is sufficient, with the first end of one of the table legs being moved towards the first end of the other table leg, for example, with the latter not being moved relative to the table top. However, known desk tops of this type have the disadvantage that the component of the spring force of the gas pressure spring, which causes the table top to be raised, is the smaller the smaller the acute angle enclosed by the underside of the table top and the table legs. The user has to Start lifting almost the entire weight of the tabletop and the objects resting on it yourself. This problem was solved in a previously known writing table attachment in that a leaf spring is arranged between the table top and one of the table legs, which after releasing a lock already raises the table top a little. However, such a leaf spring can only cause a lifting by a small amount, which is usually not sufficient to simplify handling sufficiently. From US 2018/0255919 A1 and from US 2018/0160799 A1 a height-adjustable desk attachment of the type mentioned is known in which to support the gas pressure spring in the area of the connection point at which the table legs are connected to one another like scissors, a Torsion spring is arranged. In this application, however, torsion springs have the disadvantage that they only have a lever arm on which they can act when the scissors formed by the table legs have opened. In a position of the table legs in which they are aligned parallel to the tabletop and in which the supporting force of the torsion springs would be required, this force is practically zero.

It is therefore the object of the invention to further develop a height-adjustable table of the type mentioned at the outset in such a way that it is easier to handle. This object is achieved according to the invention by a height-adjustable table, in particular a desk attachment, with the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

The invention is based on the idea of using the torsion spring to apply an additional spring force which supports the spring force of the gas pressure spring and which is able to support the raising of the tabletop over a longer distance. The torsion spring located in the area of the scissors joint is a simple component that makes its spring force permanently available, regardless of the alignment of the table legs. She is preferred designed in such a way that their spring force decreases when the distance between the second end of the table legs and the table top increases, i.e. when the height of the desk top is increased and the component of the spring force of the gas pressure spring used to raise the table top increases. The Schenkelfe brings its greatest force to when the table legs are aligned parallel to the tabletop and the gas spring can not apply any force that supports lifting the tabletop. The torsion spring and the gas pressure spring are expediently matched to one another in such a way that when the table legs move, the decreasing force of the torsion spring is compensated for by the increasing force of the gas pressure spring, and vice versa.

It is preferred that the second table leg can be pivoted with respect to the table top by means of a second joint fixed on the underside of the table top. Only the first end of the first table leg is then mounted displaceably with respect to the table top. In addition, it is expediently provided that the table legs can be moved between a first end position, in which their second ends have the smallest possible distance from the tabletop, and a second end position, in which their second ends have the greatest possible distance from the tabletop, and that a locking mechanism is provided with which the table legs can be locked in their end positions. In addition, the table legs can preferably be locked in several intermediate positions lying between the end positions. In order to keep the height of the height-adjustable table as low as possible when the table legs are in their first end position, they are expediently aligned parallel to the tabletop in the first end position. In addition, a hand lever is expediently provided, through the actuation of which the gas pressure spring is activated to exercise its spring force. At the same time, the locking mechanism for releasing the locking is actuated by operating the hand lever.

To increase the table surface of the height-adjustable table, the table top can have a set top that can be pulled out like a drawer and is arranged on its underside. This can be pulled out if a larger installation area is required. Preferably, each of the table legs has a transverse bar extending transversely to the associated table leg and at least one mounting element for mounting on the mounting surface. The longer the crossbar, the more stable the desk attachment is on the installation surface. In this case, it is preferred that the at least one positioning element of a first of the table legs has a flat underside for positioning on the positioning surface. The at least one positioning element of the first table base is expediently arranged on the associated transverse beam so that it can pivot to a limited extent, with the pivot axis expediently running parallel to the longitudinal extent of the transverse beam. Furthermore, the at least one positioning element of the second table base is advantageously a roller or roller arranged rotatably on the associated transverse beam for rolling on the positioning surface. Here, too, the axis of rotation of the roller or cylinder or of the rollers or cylinders expediently extends parallel to the longitudinal extent of the transverse beam in question. When the height of the table is adjusted, the second table base is then moved easily and without great effort over the installation surface, in that the roller or cylinder or rollers or cylinders roll on the installation surface. The flat underside of the first table leg, on the other hand, prevents the table from rolling away on the set-up surface. The unavoidable change in the angle of inclination of the table leg carrying the first table leg relative to the installation surface during height adjustment is compensated for by pivoting the at least one installation element of the first table leg. The first table leg according to the above definition can be arranged on the first table leg and the second table leg can be arranged on the second table leg or vice versa.

The invention is explained in more detail below with reference to an exemplary embodiment shown schematically in the drawing. Show it

Fig. 1a, 1b a height-adjustable table as a desk attachment with the

Table legs in a first end position and in a second end position, each in a perspective view from below; 2a shows the desk attachment according to FIGS. 1a, 1b placed on a desk with the additional panel pulled out, in a front view;

2b, 2c the desk attachment according to FIG. 2a in a side view with the table legs in the first end position and in the second end position and

Fig. 3a to c detailed representations W, Y, Z from Fig. 2b, 2c, partially in section.

The height-adjustable table shown in the drawing, designed as a desk attachment 10, is intended to be placed on a footprint 14 formed by a desk top of a desk 12. The desk attachment 10 has a tabletop 16 on the underside 18 of which two table legs 20, 22 are pivotably articulated. A first table leg 20 is pivotably connected at its first end 24 to the table top 16 by means of a first joint 26 , the first joint 26 being arranged on the table top 16 in a longitudinally displaceable manner. The second table leg 22 is pivotably connected at its first end 28 to the table top 16 by means of a second joint 30, the second joint 30 having a joint partie 32 fixed to the table top 16, with respect to which the second table leg 22 can be pivoted. At their second, free ends 34, 36, the table legs 20, 22 are each provided with a table base 38, 40, with a first table base 38 fixed to the free end 34 of the first table leg 20 and a second table base 40 fixed to the free end

36 of the second table leg 22 is connected. At a connection point 42 located approximately in the middle of the table legs 20, 22, the table legs 20, 22 are connected to one another in the manner of scissors so that they can pivot relative to one another about an axis 44, so that a linear movement of the first joint 26 causes the table legs 20, 22 to pivot about the Axis 44 and a pivoting of the table legs 20, 22 relative to the table top 16 and thus a change in the height of the writing table attachment 10 causes.

A gas pressure spring 46 is arranged on the underside 18 of the table top 16 , the first end 48 of which is firmly connected to the table top 16 . The second ending 50 of the gas pressure spring 46 is connected to a driver rail 52 which is connected to the first joint 26 in turn. A change in length of the gas pressure spring 46 thus causes a linear displacement of the first joint 26 in a direction parallel to the longitudinal extension of the gas pressure spring 46. The spring force of the gas pressure spring 46 forces the first ends 24, 28 of the table legs 20, 22 towards one another, so that they are lifted the tabletop 16 supports. In a first end position shown in FIG. 1a, the second ends 34, 36 of the table legs 20, 22 are at their smallest possible distance from the table top 16, and the table legs 20, 22 are aligned parallel to the table top 16. In Fig. 1b is the writing table top 10 with its table legs 20, 22 ge in a second end position shows in which the free ends 34, 36 of the table legs 20, 22 have their greatest possible distance from the tabletop 16. A locking mechanism 54 allows locking of the table legs 20, 22 in the first end position, in the second end position and in a variety of intermediate positions.

A torsion spring 56 is arranged in the area of the connection point 42, the first leg 58 of which is supported on the first table leg 20 between the connection point 42 and the second end 34 thereof, and the second leg 60 of which is supported between the connection point 42 and the second end 36 of the second table leg 22 is supported on this. The spring force of the torsion spring 56 also supports a raising of the table top 16 by pushing both the first ends 24, 28 and the second ends 34, 36 of the table legs 20, 22 toward each other. The spring force of the torsion spring 56 is greatest when the table legs 20, 22 are in the first end position, i.e. when the proportion of the spring force of the gas pressure spring acting perpendicular to the longitudinal extent of the table legs 20, 22 and causing the table legs 20, 22 to pivot against one another 46 is practically zero and raising the table top 16 can not or hardly support. A hand lever 62 is used to actuate the locking mechanism 54 so that the locking of the table legs 20, 22 is released, and the gas pressure spring 46 is activated so that its spring force can act on the carrier rail 52. Each of the table legs 38, 40 has a transverse beam 64 which extends transversely to the longitudinal extension of the table legs 20, 22. On the transverse beam 64 of the first table base 38 two first mounting elements 66 are spaced apart, each having an underside surface 68 for setting up on the surface 14 Aufstellflä. The first positioning elements 66 each have a receiving body 70, which can be pivoted relative to the transverse beam 64 to a limited extent about a pivot axis running parallel to the longitudinal extension of the relevant transverse beam 64, and which accommodates a positioning part 72 having the underside surface 68, which is screwed out by means of a screw thread can be moved into and out of the receiving body 70. The second table base 40 also has two spaced-apart second positioning elements in the form of rollers 74 which are accommodated in the transverse bar 64 so as to be freely rotatable about an axis of rotation running parallel to the longitudinal extent of the associated transverse bar 64 . If the height of the desk top 10 is changed, the rollers 74 roll over the support surface 14, while the changes in the angle of inclination of the first table leg 20 to the support surface 14 are compensated for by pivoting the first support elements 66 relative to the transverse beam 64 that supports them.

In order to expand the usable area of the desk attachment 10, the tabletop 16 has an additional panel 76 that can be pulled out like a drawer and that can be gripped by a loop 78 and pulled out. The additional plate 76 is arranged above the underside 18 and thus above the table legs 20,22.

In summary, the following can be stated: The invention relates to a height-adjustable table, in particular as a desk attachment 10, with a table top 16 and with two table legs 20, 22 pivotably attached to the table top 16 at their first ends 24, 28, which at their free second ends 34,

36 are each provided with a table base 38, 40 for setting up on a set-up surface 14, in particular on a desk top, with at least a first of the table legs 20 being linearly displaceable with respect to the table top 16 by means of a first joint 26 mounted on an underside 18 of the table top 16 can be pivoted, the table legs 20, 22 being connected to one another in the manner of scissors at a distance from their first ends 24, 28 and at a distance from their second ends 34, 36, and a gas pressure spring 46 on the underside 18 of the table top 16 is arranged, the first end 48 of which is connected to the table top 16 and the second end 50 of which is connected to the first table leg 20, and the spring force of which urges the first ends 24, 28 of the table legs 20, 22 towards one another. According to the invention, a leg spring 56 is provided, which is arranged in the region of the connection point 42, where one leg 58, 60 of the leg spring 56 is supported on the first and second table leg 20, 22, and whose spring force affects the second ends 34, 36 of the Table legs 20, 22 urges away from the tabletop 16.

Claims

Expectations

1. Height-adjustable table, in particular as a desk attachment (10), with a table top (16) and with two at their first ends (24, 28) pivotally attached to the table top (16) table legs (20, 22) which at their free second ends (34, 36) are each provided with a table base (38, 40) for setting up on a set-up surface (14), in particular on a desk top, with at least a first of the table legs (20) being attached by means of a 18) of the table top (16) linearly displaceable Lich mounted first joint (26) relative to the table top (16) is pivotable, wherein the table legs (20, 22) at a distance from their first ends (24, 28) and im Distance to their second ends (34, 36) are connected to each other like scissors at regular connection point (42), and wherein a gas pressure spring (46) on the underside (18) of the table top (16) is arranged, the first end (48) with the table top (16) and the second end (50) with the first table leg (20) and the spring force of which forces the first ends (24, 28) of the table legs (20, 22) towards one another, characterized by a torsion spring (56) which is arranged in the region of the connection point (42), one leg (58, 60) of each leg spring (56) being supported on the first and second table legs (20, 22), and their spring force lifting the second ends (34, 36) of the table legs (20, 22) from the table top (16) urges away.

2. Height-adjustable table according to claim 1, characterized in that the second table leg (22) by means of a on the underside (18) of the table top te (16) fixed second joint (30) relative to the table top (16) is pivotable.

3. Height-adjustable table according to claim 1 or 2, characterized in that the table legs (20, 22) between a first end position in which their second ends (34, 36) have the smallest possible distance from the tabletop

(16) and a second end position, in which their second ends (34, 36) have the greatest possible distance from the table top (16), are movable, and that a locking mechanism (54) is provided with which the table legs (20, 22) can be locked in their end positions. 4. Height-adjustable table according to claim 3, characterized in that the table legs (20, 22) can be locked in several intermediate positions between their end positions by means of the locking mechanism (54).

5. Height-adjustable table according to claim 3 or 4, characterized in that the table legs (20, 22) are aligned parallel to the table top (16) in the first end position.

6. Height-adjustable table according to one of claims 3 to 5, characterized by a hand lever (62), by the actuation of which activates the Gasdruckfe (46) to exert its spring force and at the same time the Arre animal mechanism (54) is actuated to release the lock. 7. Height-adjustable table according to one of the preceding claims, characterized in that the leg spring (56) is designed in such a way that its spring force increases with increasing distance between the second ends (34, 36) of the table legs (20, 22) and the table top (16). decreases.

8. Height-adjustable table according to claim 7, characterized in that the torsion spring (56) and the gas pressure spring (46) are matched to one another in such a way that when the table legs (20, 22) move, the detachable Coming force of the torsion spring (56) by the increasing force of the gas pressure spring (46) is balanced and vice versa.

9. Height-adjustable table according to one of the preceding claims, characterized in that the tabletop (16) has an over its underside (18) arranged, drawer-like pull-out additional panel (76).

10. Height-adjustable table according to one of the preceding claims, characterized in that each of the table feet (38, 40) has a transverse bar (64) extending transversely to the associated table leg (20, 22) and at least one positioning element (66, 74) for Set up on the set-up area

(14).

11. Height-adjustable table according to claim 10, characterized in that the at least one positioning element (66) of a first of the table legs (38) has a flat underside surface (68) for positioning on the positioning surface (14).

12. Height-adjustable table according to claim 11, characterized in that the at least one positioning element (66) of the first table base (38) is arranged so that it can pivot to a limited extent on the associated transverse beam (64).

13. Height-adjustable table according to one of Claims 10 to 12, characterized in that the at least one positioning element (74) of the second table base (40) is a roller arranged rotatably on the associated transverse beam (64) for rolling on the positioning surface (14). .