WO2018210563A1

WO2018210563A1 - Lifting mechanism for a shelf, piece of furniture or domestic appliance, and drawer

Info

Publication number: WO2018210563A1
Application number: PCT/EP2018/061162
Authority: WO
Inventors: David Krüger; Arnold GURR
Original assignee: Paul Hettich Gmbh & Co. Kg
Priority date: 2017-05-15
Filing date: 2018-05-02
Publication date: 2018-11-22
Also published as: DE102017110490A1

Abstract

The invention relates to a lifting mechanism for a shelf (3) of a piece of furniture (1) or domestic appliance, having a shearing mechanism with at least two crossed shearing levers (5, 6) which are connected together in a rotatable manner for lifting and lowering the shelf (3). A first end (52) of a first shearing lever (5) is arranged on a base (2) in a rotatable and movable manner, and a first end (62) of a second shearing lever (6) is arranged on the base (2) in a stationary and rotatable manner. A second end (53) of the first shearing lever (5) is arranged on the shelf (3) in a stationary and rotatable manner, and a second end (63) of the second shearing lever (6) is arranged on the shelf (3) in a rotatable and movable manner. The lifting mechanism also has a pivot lever (4), which is coupled to the shearing mechanism, and at least one damping element (7), which is coupled to the shearing mechanism. The pivot lever (4) is connected to the first shearing lever (5) directly and to the second shearing lever (6) via a knee joint (82). The knee joint (82) is made of a knee lever (8) which is rotatably secured to the pivot lever (4) and the second shearing lever (6) which is rotatably secured thereto. The at least one damping element (7) is designed as a damping element which is single-acting in the pulling direction or pushing direction, and a first end (73) of the at least one damping element (7) is rotatably secured to the second shearing lever (6) and a second end is rotatably secured to the knee lever (8) so as to damp a lifting of the shelf (3) into an upper end position. The invention also relates to a piece of furniture or domestic appliance and a drawer comprising such a lifting mechanism.

Description

Lifting mechanism of a shelf, furniture or household appliance and

drawer

The present invention relates to a lifting mechanism of a shelf of a piece of furniture or household appliance according to the preamble of claim 1. The invention further relates to a furniture or household appliance or a drawer.

A generic lifting mechanism with a tray is known for example from DE 10 2015 102 500 A1. The lifting mechanism shown here has a scissors mechanism with two crossed and rotatably interconnected scissor levers for raising and lowering the tray.

To raise and lower the tray is a pivot lever.

Such a lifting mechanism has proven itself. The problem with such manually operable lifting mechanisms is that the user must spend more or less operating force, depending on the weight of the load, in order to actuate the lifting mechanism. In particular, at low loading of the tray, a lifting operation limiting end stop can be achieved surprisingly easily, which can lead to damage to the lifting mechanism in case of excessive user-applied force.

Object of the present invention is to provide a lifting mechanism with a shelf and a piece of furniture or household appliance or a drawer, with the particular lifting of the shelf is designed to be more user-friendly.

This object is achieved by a lifting mechanism with a tray having the features of claim 1.

The object is further achieved by a furniture or household appliance or a drawer with the features of claims 9 and 10.

The lifting mechanism according to the invention has a scissors mechanism with at least two crossed and rotatably interconnected scissor levers for raising and lowering the tray. In this case, a first scissor lever is rotatable and displaceable at a first end and a second scissor lever at a first end fixed and rotatably arranged on a base. A second end of the first scissor lever is stationary and rotatable and a second end of the second scissor lever is rotatably and slidably disposed on the tray.

The lifting mechanism further comprises a pivoting lever coupled to the scissor mechanism and at least one damping element coupled to the scissors mechanism.

The swivel lever is connected directly to the first scissor lever and a knee joint to the second scissor lever. In this case, the knee joint may be formed by a toggle lever rotatably mounted on the toggle lever and a rotatably mounted thereto side arm or area of the second scissor lever.

The at least one damping element is designed as a damping element which acts in a simple manner in the direction of pull or compression. The at least one damping element is arranged with a first end on the second scissor lever, for example on a side arm or on a flat area, and with a second end rotatably mounted on the toggle, a lifting of the tray in an upper end position arranged damping. With such a trained lifting mechanism, it is possible to achieve a damped lifting to an upper end position by means of a simple and inexpensive single-acting damping element.

Advantageous embodiments of the invention are the subject of the subclaims.

According to an advantageous embodiment of the invention, the damping element is designed as acting in the compression direction damping element and rotatably attached to the first end on the side arm or on a flat region of the second scissor lever.

According to an alternative embodiment, in which the damping element is likewise designed as a damping element acting in the pressure direction, is it rotatably attached to the first end at the transition of the side arm or the area in a main arm of the second scissor lever.

Characterized both a damping of the lifting movement in the upper end position and a lowering movement is realized in a lower end position with a single single-acting damping element.

According to a further embodiment variant, a second damping element, which dampens a lowering of the tray into a lower end position, is rotatably mounted with a first end on the second shearing lever and with a second end on the first shearing lever.

As a result, in the case of the exemplary embodiment, an additional damping of the movement of the tray into the lower end position is ensured by means of a damping movement for damping the lifting movement. In the embodiment in which the one damping element realized both a damping of the lifting movement in the upper end position and a lowering movement into a lower end position, thereby an additional damping of the lowering movement of the tray is made possible in the lower end position.

For easy operation of the lifting mechanism, a handle is attached according to a preferred embodiment of a free, pivotable by a user end of the pivot lever. To stabilize the tray according to a further preferred embodiment, a scissor mechanism is arranged in each case on each of two opposite sides of the tray.

The furniture or household appliance is characterized by a lifting mechanism as described above.

The drawer, with a lifting mechanism with a tray is characterized by a lifting mechanism as described above. Hereinafter, preferred embodiments of the invention are explained in detail with reference to the accompanying drawings.

Show it: 1 a) is a perspective view of a lifting mechanism attached thereto without damper,

1 b) the lifting mechanism from FIG. 1 a) in a side view,

2a and 2b) corresponding to FIGS. 1 a and 1 b) representations of the lifting mechanism with a first and a second damping element in a lower end position,

3a and 3b) corresponding to FIGS. 2a and 2b) representations of the lifting mechanism in an intermediate position between the lower end position and an upper end position,

Fig. 4a and 4b) Figs. 2a and 2b) corresponding representations of the lifting mechanism in the upper end position and

Fig. 5a to 7b) to Figs. 2a to 4b) corresponding representations of an alternative embodiment of a lifting mechanism with a damping element.

In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc. refer exclusively to the exemplary representation and position of the lifting mechanism selected in the respective figures, the scissors lever, the pivoting lever, the damping element, the tray and the same. These terms are not meant to be limiting, that is to say, by different working positions or the mirror-symmetrical design or the like, these references may change.

In FIGS. 2b and 5b, reference numeral 1 denotes a variant of a lifting mechanism according to the invention as a whole. The lifting mechanism 1 has, as exemplified in FIGS. 1 a) and 1 b), a scissors mechanism with at least two crossed and rotatably interconnected scissor levers 5, 6, which serve to raise and lower a tray 3.

The tray 3 can, as shown in FIGS. 1 a) and 1 b), be designed as a container. It is also conceivable, the tray 3 as a basket, such as dish rack in the case of the use of such a lifting mechanism 1 in one trained as a dishwasher household appliance or as a tablature tray.

As shown in all of the figures, a first shearing lever 5 is rotatably and slidably disposed on a base 2 at a first end 52. A second scissor lever 6 is stationary at a first end 62 and rotatably disposed on this base 2.

As a base 2 can, as shown by way of example in Fig. 1 a), a bottom 21 serve with laterally mounted strips 22, in which a guide groove 23 for guiding the first end 52 of the first scissor lever 5 is used.

It is also conceivable to form the base as a running rail of a rail system, which is movable with a guide rail mounted in a body of a piece of furniture or household appliance and with which the tray 3 together with the lifting mechanism 1 from a carcase interior of the furniture or household appliance can be pushed out.

A second end 53 of the first scissor lever 5 is stationary and rotatably arranged on the tray 3. Accordingly, a second end 63 of the second scissor lever 6 is rotatably and slidably disposed on the tray 3.

For displacement of the second end 63 of the second scissor lever 6, a guide groove 32 is formed in a side wall 31 of the tray 3, in which the second end 63 of the scissors lever 6 is held slidably received.

Instead of such a guide groove 32, it is also conceivable to form on the outside of the side wall 31, a guide rail or fasten. The first scissors lever 5 and the second scissors lever 6 are pivotable relative to each other via a pivot 10 of a plane parallel to the side wall 31 of the tray.

To raise or lower this scissors mechanism is a pivot lever 4, which is coupled to the scissors mechanism. In this example, a handle 43 is present in the upper region of the pivot lever 4.

The pivoting lever 4 is connected directly to the first scissor lever 5 and via a knee joint 82 to the second scissor lever 6. This knee joint 82 is thereby formed by a pivot lever 4 rotatably mounted toggle lever 8 and a rotatably mounted thereto side arm 64 of the second scissor lever 6. The side arm 64 of the second scissor lever 6 extends at an angle from a main arm 61 of the second scissor lever 6 in a region between the attached at the intersection between the scissors levers 5, 6 pivot 1 0 and the second end 63 of the second scissor lever 6. At a first end of the knee lever 8, the axis of rotation of the knee joint 82 is arranged. The second end 83 of the toggle lever 8 is pivotally connected to the pivot lever 4.

As can be seen in FIGS. 1 a) and 1 b), a side branch 65 branches off from the side arm 64 of the second scissor lever 6.

As shown in FIGS. 2 a) to 7 b), the lifting mechanism 1 furthermore has at least one damping element 7 coupled to the scissors mechanism.

This damping element 7 is designed as a simple acting in the pulling direction or compression direction damping element. The damping element 7 is rotatably mounted with a first end 73 on the side arm 64 of the second scissor lever 6 and with a second end 74 on the toggle lever 8, so that it dampens a lifting of the tray 3 in the upper end position shown in Figures 4a) and 4b) ,

As shown in FIGS. 2a) to 4b), the damping element 7 is designed here as a damping element acting in the pressure direction. A first end 73 of this damping element 7 is rotatably mounted at the free end of the side branch 65 of the side arm 64 of the second scissor lever 6.

As can be seen in FIGS. 2 b), 3 b) and 4 b), in the position shown in FIG. 2 b, in which the scissors mechanism is positioned in the lower end position, the damping ram 72 is pulled out of the damper housing 71 to the maximum and becomes in the lifting movement in the direction of the upper end position gradually retracted into the damper housing 71, which has a damping effect in the acting in the compression direction damping element 7 result. FIG. 3b) shows an intermediate position and FIG. 4b) shows the upper one End position, in which the plunger 72 of the damping element 7 is maximally retracted into the housing 71 of the damping element 7.

FIGS. 2 a) to 4 b) furthermore show a second damping element 9 for effecting a damping of the lowering movement of the tray 3 into the lower end position, which is coupled to the scissors mechanism.

In this case, a first end 93 of this formed as a pressure damper second damping element 9 is rotatably mounted near the first end 62 of the second scissor lever 6. The second end 94 of the second damping element 9 is rotatably mounted near the pivot joint 10 disposed at the point of intersection of the scissors levers 5, 6 between the pivot 10 and the second end 53 of the first scissor lever 5, so that when raising the tray 3 by means of the scissor mechanism a damping ram 92nd of the second Dämpfungsele- element 9 is pulled out of a damper housing 91 of the second damping element 9 without damping effect and is pushed back into the damper housing 91 of the second damping element 9 when lowering the tray 3 in the lower end position while exerting a damping force. The attachment of this second damping element 9 is to be considered optional. It is also conceivable, the formation of such a lifting mechanism without second damping element. 9

In the embodiment variant shown in FIGS. 5a) to 7b), the scissor mechanism is coupled with only one damping element 7. The damping element 7 is preferably of the same type as the damping element 7 described with reference to FIGS. 2a) to 4b) as a damping element acting in the direction of compression. In contrast to the embodiment shown in Figures 2a) to 4b), the first end 73 of the damping element 7 is rotatably mounted at a transition of the side arm 64 in a main arm 61 of the second scissor lever 6. In this particular positioning of the first damping element 7, the damping element 7 can be used both for a damping of the lifting movement in the upper end position and for the lowering movement from the upper end position to the lower end position. In this arrangement, the damping element 7, as shown in Figures 6a) and 6b) is maximally deflected in an intermediate position of the scissors mechanism between the upper and lower end position. Accordingly, both the further pivoting of the scissors mechanism in the upper end position and in the lowering movement in the lower end position, shown in Figures 4a) and 4b), causes the plunger 72 of the damping element 7 is retracted into the housing 71.

Thus, a single-acting damping element 7 can be used in two ways.

It is also conceivable to arrange the second damping element 9 with its two ends 93, 94 between the rotary joint 10 and the first ends 52, 62 of the scissor levers 5, 6.

In this case, the damping element 9 would be designed as a damping element acting in the pulling direction and would accordingly attenuate a lowering movement of the scissor mechanism from an upper position to the lower end position.

LIST OF REFERENCE NUMBERS

1 lifting mechanism

2 base

21 floor

22 bar

23 guide groove

3 storage

31 side wall

32 guide groove

4 pivot lever

43 handle

5 first scissor lever

52 first end

53 second end 6 second scissor lever

61 main arm

62 first end

63 second end

64 side arm

65 side branch

7 damping element

71 damper housing

72 damping plunger

73 first end

74 second end

8 knee lever

82 Knee joint

83 second end

9 damping element

91 damper housing

92 dampening ram 93 first end

94 second end

10 swivel

Claims

claims

Lifting mechanism (1) a shelf (3) of a piece of furniture or household appliance, comprising

a scissor mechanism with at least two crossed and rotatably interconnected scissor levers (5, 6) for lifting and lowering the tray (3),

- Wherein a first scissor lever (5) at a first end (52) rotatable and displaceable and a second scissors lever (6) at a first end (62) fixed and rotatable on a base

(2) is arranged

- Wherein a second end (53) of the first scissor lever (5) stationary and rotatable and a second end (63) of the second scissor lever (6) is rotatably and slidably disposed on the tray (3),

a pivot lever (4) coupled to the scissor mechanism,

at least one damping element (7) coupled to the scissors mechanism,

characterized in that

- The pivot lever (4) directly to the first scissor lever (5) and via a knee joint (82) is connected to the second scissor lever (6),

- wherein the knee joint (82) is formed by a pivot lever (4) rotatably mounted toggle lever (8) and the second scissor lever (6) rotatably mounted thereon,

- Wherein the at least one damping element (7) is designed as in the pulling direction or compression direction single-acting damping element and

- Wherein the at least one damping element (7) with a first end (73) rotatably mounted on the second scissor lever (6) and with a second end on the toggle lever (8), lifting the tray

(3) is arranged damping in an upper end position.

Lifting mechanism according to claim 1, characterized in that the

Damping element (7) is rotatably mounted as acting in the compression direction damping element with the first end (73) on a side arm (64) or in a planar region of the second scissor lever (6).

Lifting mechanism according to claim 1, characterized in that the damping element (7) acting as a compression direction damping element with the first end (73) at the transition of a side arm (64) or a flat portion in a main arm (61) of the second scissor lever (6) is rotatably mounted.

4. lifting mechanism according to claim 1, characterized in that the damping element (7) additionally attenuates a lowering of the tray (3) in a lower end position.

5. Lifting mechanism according to one of the preceding claims, characterized in that a second damping element (9) lowering the tray (3) in a lower end position damping with a first end (93) on the second scissor lever (6) and with a second end ( 94) is rotatably mounted on the first scissor lever (5).

6. Lifting mechanism according to one of the preceding claims, characterized in that on each of two opposite sides of the tray (4) each have a scissors mechanism is arranged.

7. Lifting mechanism according to one of the preceding claims, characterized in that the tray (4) is designed as a container, basket or shelf tray.

8. Lifting mechanism according to one of the preceding claims, characterized in that the base (2) is designed as a bottom or guide rail.

9. furniture or household appliance having a body and a tray (4) with a lifting mechanism, wherein the tray (4) via the lifting mechanism can be raised and lowered, characterized in that the lifting mechanism is designed according to one of claims 1 to 8.

10. drawer with a lifting mechanism with a tray (3), wherein the tray (3) via the lifting mechanism from the drawer is raised and lowered into this, characterized by at least one arranged in a receiving space, in particular on a bottom of the drawer lifting mechanism according to a of claims 1 to 8.