EP3613932A1 - Actuator for furniture valves - Google Patents

Abstract

Actuator (5) for moving a movable furniture part (3), comprising: - at least one adjusting arm (9) pivotably mounted about an axis of rotation (10) for moving the movable furniture part (3), - a spring device (11) for applying force to the adjusting arm ( 9), - a transmission mechanism (25) for transmitting a force from the spring device (11) to the actuating arm (9), the transmission mechanism (25) being an actuating part (29) coupled to the actuating arm (9), an actuating contour (20) and a pressure piece (7) loaded by the spring device (11), wherein the pressure piece (7) is designed as a rotatably mounted pressure roller (19) and can be moved when the adjusting arm (9) moves along the adjusting contour (20), the Adjusting contour (20) is arranged between the adjusting part (29) and the pressure roller (19), the adjusting contour (20) being formed on a contour part (8) separate from the adjusting part (29), the contour part (8) having a fastening section (28 ) for abutment on the actuating part (29) and a web (31) projecting transversely from the fastening section (28), the actuating contour (20) being formed by a curved outer surface (34) of the web (31).

Description

• zumindest einen um eine Drehachse schwenkbar gelagerten Stellarm zum Bewegen des bewegbaren Möbelteiles,
• eine Federvorrichtung zur Kraftbeaufschlagung des Stellarmes,
• einen Übertragungsmechanismus zum Übertragen einer Kraft von der Federvorrichtung auf den Stellarm, wobei der Übertragungsmechanismus ein mit dem Stellarm bewegungsgekoppeltes Stellteil, eine Stellkontur und ein von der Federvorrichtung belastetes Druckstück aufweist, wobei das Druckstück als drehbar gelagerte Druckrolle ausgebildet ist und bei einer Bewegung des Stellarmes entlang der Stellkontur verfahrbar ist, wobei die Stellkontur zwischen dem Stellteil und der Druckrolle angeordnet ist.

The present invention relates to an actuator for moving a movable furniture part, comprising:

• at least one adjusting arm pivotably mounted about an axis of rotation for moving the movable furniture part,
• a spring device for applying force to the actuating arm,
• a transmission mechanism for transmitting a force from the spring device to the actuating arm, the transmission mechanism having an actuating part which is coupled to the actuating arm, an actuating contour and a pressure piece loaded by the spring device, the pressure piece being designed as a rotatably mounted pressure roller and upon movement of the actuating arm along the adjusting contour is movable, the adjusting contour being arranged between the adjusting part and the pressure roller.

Furthermore, the invention relates to an arrangement with a movable furniture part and with an actuator of the type to be described.

Such an actuator is for example in the DE 10 2006 014 493 A1 shown. Here, a pivotably mounted actuating arm is pivotably mounted via an actuating contour arranged on the actuating arm and a pressure piece resting on this actuating contour in the form of a rotatably mounted pressure roller. The adjusting contour of the adjusting arm is formed by the material thickness of the adjusting arm and additionally by disk parts arranged on both sides of the adjusting arm (disk parts 30, 31 in Fig. 4 ), so that this three-part construction increases the contact area to the pressure roller and consequently the forces can also be distributed over an enlarged area.

The actuating contours of such actuators are usually produced by fineblanking or fine blanking, that is to say by a manufacturing process in which precisely contoured workpieces with smooth and right-angled cutting surfaces can be produced in one operation. An advantage of this In any case, the technology compared to a conventional stamping process is that the smooth cut achieved thereby enables a high surface quality to be achieved, which means that complex post-processing of the positioning contours (for example polishing) can be dispensed with. A smooth surface of the positioning contour is a necessary prerequisite because any unevenness in the positioning contour has a negative effect on a user when opening and closing the movable furniture part. A disadvantage of fine stamping, however, is that this manufacturing process is relatively cost-intensive and only allows a low number of cycles in series production.

Another disadvantage of the previously known designs of positioning contours is that the running surface of the positioning contour provided for contact with the pressure roller is determined by the material thickness of the positioning contour. It is therefore necessary to provide relatively high material thicknesses in order to provide a sufficiently stable contact surface for the pressure piece, which is partially subjected to very high pretensioning forces by the spring device.

In the WO 2004/104339 A1 An adjusting mechanism for furniture flaps is shown, wherein a pivotably mounted adjusting arm has at its end forming the adjusting contour a surface that runs perpendicular to the pivot axis of the adjusting arm. A bead projects axially from this surface with respect to the pivot axis, the bead running along the positioning contour. In addition, a slide shoe with a groove is provided, which receives the bead and is guided along it. The slide shoe therefore lies flat against this bead, so that point contacts or line contacts with high surface pressure are avoided. The surface quality of the bead is practically irrelevant due to the flat sliding shoe, because any unevenness in the bead is compensated for by the flat contact of the sliding shoe and has no effect on the movement behavior of the actuating arm.

The object of the present invention is to propose an actuator of the type mentioned at the outset, the manufacture of such an actuating contour being simplified.

This is solved according to the invention by the features of patent claim 1. Further advantageous refinements of the invention are specified in the dependent subclaims.

According to the invention, it is therefore provided that the positioning contour is formed on a contour part separate from the positioning part, the contour part having a fastening section for bearing against the positioning part and a web projecting transversely from the fastening section, the positioning contour being formed by a curved outer surface of the web.

In other words, according to the invention, a contour part separate from the control part is provided with an adjustment contour, which serves as a kind of intermediate piece between the pressure roller and the control part. When the actuating arm moves, the pressure roller is therefore not movably supported along a contour of the actuating part which is coupled to the actuating arm, but rather along a curved outer surface of the contour part separate from the actuator.

According to one embodiment, it is provided that the actuating part, which is coupled to the actuating arm, is mounted so as to be pivotable about an axis of rotation. At the end region facing this axis of rotation, the actuating part has a circumferential surface which is radially spaced with respect to this axis of rotation, this radially spaced circumferential surface of the actuating part being covered at least in sections by the actuating contour of the contour part. It is preferably provided that the positioning contour of the contour part forms a contact surface for the rotatably mounted pressure roller that runs parallel with respect to the axis of rotation of the positioning part.

A particular advantage of the invention lies in the fact that the contour part with the positioning contour or the positioning part itself can be designed as a bent part or deep-drawn part. Deep drawing is a known method of metal forming, in which a flat metal blank is formed into a hollow body without causing a substantial change in the metal thickness. In this way, with relatively thin material thicknesses, contour parts or adjusting parts with large and smooth surfaces can be produced, which form the adjusting contour for the pressure piece.

Fig. 1a, 1b

ein Möbel mit einer hochbewegbaren Klappe in einer Schließstellung und in einer Offenstellung,

Fig. 2

ein mögliches Ausführungsbeispiel eines Stellantriebes in einem perspektivischen Schnitt,

Fig. 3

eine Detailansicht des Stellantriebes in einem perspektivischen Schnitt,

Fig. 4a, 4b

zwei verschiedenen Varianten der Anbringung von Konturteilen am Stellteil,

Fig. 5a, 5b

ein Ausführungsbeispiel eines mehrteilig ausgebildeten Konturteiles,

Fig. 6a-6d

ein Ausführungsbeispiel mit einer als Doppelkegelrolle ausgebildeten Druckrolle.

Further details and advantages of the present invention result from the exemplary embodiments shown in the figures. It shows:

1a, 1b

a piece of furniture with a flap that can be moved up in a closed position and in an open position,

Fig. 2

a possible embodiment of an actuator in a perspective section,

Fig. 3

a detailed view of the actuator in a perspective section,

4a, 4b

two different variants of attaching contour parts to the control element,

5a, 5b

an embodiment of a multi-part contour part,

6a-6d

an embodiment with a pressure roller designed as a double tapered roller.

Fig. 1a shows a side view of a piece of furniture 1 with a furniture body 2 and with a movable furniture part 3 in the form of a flap 4 which is mounted so that it can be moved up relative to the furniture body 2. Fig. 1b shows the furniture 1 with the flap 4 in an open position, the flap 4 being pivotally mounted via hinges 22 relative to a cabinet cover 23 of the furniture body 2. To the Moving the flap 4, an actuator 5 is provided with a housing 6 which is pivotally supported on the furniture body 2 on a bearing axis 21. Furthermore, the actuator 5 comprises an actuating arm 9, which is mounted so that it can pivot about a horizontally extending axis of rotation 10 in the installed position. By means of the actuator 5, the flap 4 is between a vertical closed position ( Fig. 1a ) and a swiveled open position that gives access to the furniture body 2 ( Fig. 1b ) movably mounted. The free end region of the actuating arm 9 is to be connected to the flap 4 via an articulated axis 24.

Fig. 2 shows the actuator 5 in a perspective section, the actuator arm 9 being pivotally mounted about an axis of rotation 10 running horizontally in the installed position. The actuator 5 comprises a housing 6 to be fastened to the furniture body 2, in which a spring device 11 is accommodated. In the exemplary embodiment shown, the spring device 11 comprises at least one compression spring designed as a coil spring, but two or more coil springs, preferably connected in parallel, can also be provided. The spring device 11 is supported at one end on an abutment in the form of an adjustable screw nut 12 which is in threaded engagement with an adjusting screw 16. The torque acting on the actuating arm 9 can be adjusted by an adjusting device 13. This adjusting device 13 comprises an adjusting wheel 14 with a receptacle 15 for an actuating tool, the adjusting wheel 14 interacting with the head of the adjusting screw 16 via a gear, preferably a bevel gear. The adjusting screw 16 can be rotated by rotating the receptacle 15 by means of the actuating tool, as a result of which the screw nut 12 can be adjusted along the thread 17 of the adjusting screw 16. In this way, the spring device 11 can be compressed differently and, consequently, the force of the spring device 11 acting on the actuating arm 9 can be variably adjusted. In the figure shown, the nut 12 is in a position in which the spring device 11 is minimally preloaded, ie that the torque acting on the actuating arm 9 is the lowest.

To transmit a force of the spring device 11 to the actuating arm 9, a transmission mechanism 25 is provided which has an actuating part 29 in the form of a cam section, coupled to the actuating arm 9, an actuating contour 20 and a pressure piece 7 loaded by the spring device 11 in the form of a rotatably mounted pressure roller 19 has, the pressure roller 19 is movable (ie unrollable) when the actuating arm 9 moves along the actuating contour 20. The pressure roller 19 is mounted on a slide 18 which is movable relative to the housing 6, preferably linearly displaceable. In the exemplary embodiment shown, the control part 29 is formed in one piece with the control arm 9, so that the axis of rotation 10 of the control part 29 also forms the axis of rotation 10 of the control arm 9. Of course, it is also possible to design the actuating part 29 separately from the actuating arm 9, for example as a pivotally mounted lever (not shown here) of the transmission mechanism 25, which is connected to the actuating arm 9 in a motion-coupled manner. It is therefore entirely possible to arrange the actuating part 29 at a different position in the active power train between the spring device 11 and the actuating arm 9.

How from Fig. 2 is clearly visible, the adjusting part 29, which is pivotably mounted about the axis of rotation 10, has a circumferential surface 26 which is radially spaced with respect to this axis of rotation 10. Thus, the pressure piece 7 in the form of the pressure roller 19 does not lie directly on the peripheral surface 26 of the adjusting part 29, but on an adjusting contour 20 in the form of a curved outer surface 34, which is formed on a contour part 8 separate from the adjusting part 29. This positioning contour 20 of the contour part 8 is arranged such that the circumferential surface 26 of the positioning part 29 radially spaced from the axis of rotation 10 is covered at least in sections. The contour part 8 can be formed from a bent metal part or deep-drawn metal part that is inexpensive and easy to produce. The contour part 8 forms an adjusting contour 20 which is eccentric relative to the axis of rotation 10 of the adjusting part 29 and which influences the movement behavior of the movable furniture part 3. The contour part 8 is motion-coupled to the actuating arm 9, with a Adjusting arm 9 also rotates the contour part 8. The adjusting contour 20 of the contour part 8 forms a different radial distance from the axis of rotation 10 of the adjusting part 29. The actuating contour 20 of the contour part 8 is designed such that the actuating arm 9 is pressed towards the end of the closing movement by the force of the spring device 11 into the complete closed position. During the opening movement of the actuating arm 9, the pressure piece 7 in the form of the pressure roller 19 reaches an apex (that is the region of the actuating contour 20 with the greatest radial distance from the axis of rotation 10), so that the spring device 11 - after passing through a dead center position - on the actuating arm 9 exerts a torque in the opening direction. To dampen the closing and / or opening movement of the actuating arm 9, a damper (not shown here), in particular a fluid damper, can also be provided.

Fig. 3 shows a detailed view of the transmission mechanism 25 of the actuator 5. The actuating part 29, which is coupled to the actuating arm 9, has fastening means 27, which are connected to corresponding fastening points 30 ( Fig. 4b ) of the contour part 8 cooperate. The contour part 8 has a fastening section 28 for lateral contact with the adjusting part 29 and a web 31 projecting transversely from the fastening section 28, the positioning contour 20 being formed by a curved outer surface 34 of the web 31. The width B of the web 31, which forms the adjusting contour 20, essentially corresponds to the width B1 of the pressure part 7, that is to say essentially the width of the pressure roller 19. The spring device 11 presses against the slide 18, which together with the pressure part 7 mounted thereon, is relative is linearly movable to the housing 6.

4a and 4b show two different variants of the attachment of contour parts 8 to the adjusting part 29. The adjusting part 29 is pivotally mounted about the axis of rotation 10 and has a circumferential surface 26 which is radially spaced in relation to the axis of rotation 10. In Fig. 4a a contour part 8 is fastened only on one side of the adjusting part 29. The contour part 8 has a flat-shaped fastening section 28, which in the installed position on a corresponding, flat side surface of the control part 29 abuts. The contour part 8 further comprises a web 31 projecting laterally from the fastening section 28, the adjusting contour 20 for the pressure piece 7 being formed by a curved outer surface 34 of the web 31. The circumferential surface 26 of the regulating part 8 is covered by the adjusting contour 20 of the contour part 8, which does not necessarily mean that the inside of the web 31 facing the circumferential surface 26 must lie directly against the circumferential surface 26 of the regulating part 29. It is preferably provided that the inside and the outside of the web 31 each form a contour running parallel to the axis of rotation 10. The actuating part 29 has fastening means 27, which in the assembled state have fastening points 30 ( Fig. 4b ) of the contour part 8 cooperate. At least one or more fastening points 30 of the contour part 8 are arranged eccentrically relative to the axis of rotation 10 of the control part 29, so that the contour part 8 is mounted on the control part 29 in a rotationally secure manner. The wall thickness of the at least one contour part 8 is essentially constant.

Fig. 4b shows a variant in which a contour part 8 with a curved outer surface 34 is arranged on both sides of the adjusting part 29. A first contour part 8 is thus fastened on a first side of the adjusting part 29 and a second contour part 8 is fastened on a second side of the adjusting part 29, the adjusting contour 20 of the first contour part 8 and the adjusting contour 20 of the second contour part 8 (ie the edge regions of the webs 31 of the two contour parts 8) abut each other and cover the peripheral surface 26 of the adjusting part 29 at least in sections.

Fig. 5a shows a further embodiment of a multi-part contour part 8, wherein the fastening section 28 and the web 31 forming the positioning contour 20 with the curved outer surface 34 are designed as separate components. In a first assembly step, the two fastening sections 28 are fastened to the left and right of the adjusting part 29, so that the two fastening sections 28 receive the adjusting part 29 in their middle.

The convexly curved web 31 has a plurality of fastening points 32 in the form of tabs which are provided for connection to the two fastening sections 28. Fig. 5b shows the embodiment according to Fig. 5a in the assembled state. The attachment points 32 of the contour part 8 are provided with openings which are provided for the passage of rivets, screws or the like. However, it is also possible that the actuating part 29 has a bearing point in which the web 31 with the actuating contour 20 can be suspended and that a locking device is provided which is remote from this bearing point and via which the web 31 with the actuating contour 20 after pivoting onto the Adjustment part 29 can be locked with this, preferably detachably.

6a-6d show an embodiment with a designed as a double tapered roller 19. As in Fig. 6a shown, the disc-shaped actuating part 29, which is coupled to the actuating arm 9, has a contour part 8 with a fastening section 28 on both sides, the webs 31 projecting transversely from the fastening sections 28 at an angle other than 90 °. The pressure roller 19, which is rotatably mounted about the hinge axis 33, in the form of the double-tapered roller runs on the curved outer surfaces 34 of the webs 31.

Fig. 6b shows the actuating arm 9 pivotally mounted about the axis of rotation 10 in a view from the front while Fig. 6c shows this construction in a perspective view. Fig. 6d shows the in Fig. 6c framed area in an enlarged view, the pressure roller 19 designed as a double tapered roller being clearly visible. This double tapered roller, which is rotatably mounted about the hinge axis 33, has two, preferably identically designed, truncated cones 19a, 19b which are connected to one another via their smaller base areas. These truncated cones 19a, 19b each roll on the outer surfaces 34 of the webs 31 which are curved in relation to the axis of rotation 10. In this way, an optimal centering of the pressure roller 19, a uniform distribution of the pressure roller 19 Exerted pressure forces of the spring device 11 and a smooth running of the pressure roller 19 for line contact with the smooth, curved outer surfaces 34 of the webs 31 are brought about.

Claims (15)

Actuator (5) for moving a movable furniture part (3), comprising: - at least one adjusting arm (9) pivotably mounted about an axis of rotation (10) for moving the movable furniture part (3), - A spring device (11) for applying force to the actuating arm (9), - A transmission mechanism (25) for transmitting a force from the spring device (11) to the actuating arm (9), wherein the transmission mechanism (25) with the actuating arm (9) movement-coupled actuator (29), an actuating contour (20) and one of the spring device (11) has a loaded pressure piece (7), the pressure piece (7) being designed as a rotatably mounted pressure roller (19) and being movable along the adjustment contour (20) when the adjustment arm (9) moves, the adjustment contour (20 ) is arranged between the adjusting part (29) and the pressure roller (19), characterized in that the positioning contour (20) is formed on a contour part (8) separate from the positioning part (29), the contour part (8) having a fastening section (28) for abutment against the positioning part (29) and one from the fastening section (28) transversely projecting web (31), the adjusting contour (20) being formed by a curved outer surface (34) of the web (31). Actuator according to Claim 1, characterized in that the web (31) projects transversely from the fastening section (28) parallel to the direction of the axis of rotation (10) of the actuating arm (9). Actuator according to claim 1 or 2, characterized in that the web (31) has a width (B) which essentially corresponds to the width (B1) of the pressure roller (19). Actuator according to one of Claims 1 to 3, characterized in that the fastening section (28) of the contour part (8) has at least one fastening point (30) for fastening to the regulating part (29), wherein it is preferably provided that the at least one fastening point (30 ) is arranged eccentrically relative to the axis of rotation (10) of the control element (29). Actuator according to one of Claims 1 to 4, characterized in that the contour part (8) is connected in a motion-coupled manner to the control part (29), the contour part (8) also moving when the control part (29) moves. Actuator according to one of claims 1 to 5, characterized in that the actuating part (29) is pivotally mounted about an axis of rotation (10), wherein it is preferably provided that that axis of rotation (10) about which the actuating part (29) is rotatably mounted , is also the axis of rotation (10) of the actuating arm (9), wherein it is preferably provided that the adjusting part (29) at the end region facing the axis of rotation (10) has a circumferential surface (26) radially spaced with respect to this axis of rotation (10). This circumferential surface (26) of the control part (29) is covered at least in sections by the control contour (20) of the contour part (8). Actuator according to Claim 6, characterized in that a first contour part (8) is fastened on a first side of the control part (29) and a second contour part (8) is fastened on a second side of the control part (29), the control contour (20) of the the first contour part (8) and the adjusting contour (20) of the second contour part (8) abut each other and cover the peripheral surface (26) of the adjusting part (29) at least in sections. Actuator according to one of claims 1 to 7, characterized in that the contour part (8) and / or the adjusting part (29) is made of a, preferably bent or deep-drawn, metal part. Actuator according to one of claims 1 to 8, characterized in that the actuating part (29) is arranged or formed on the actuating arm (9). Actuator according to one of claims 1 to 9, characterized in that the spring device (11) comprises at least one, preferably designed as a compression spring, coil spring. Actuator according to one of claims 1 to 10, characterized in that the axis of rotation (10) of the actuating arm (9) extends horizontally in the mounting position and that the actuating arm (9) can be acted upon by the spring device (11) about the axis of rotation (10) in the opening direction , Actuator according to one of claims 1 to 11, characterized in that the pressure roller (19) is designed as a double tapered roller with two truncated cones (19a, 19b) connected to one another, wherein it is particularly preferably provided that the truncated cones (19a, 19b) over their smaller ones Base areas are interconnected. Actuator according to one of claims 1 to 12, characterized in that the actuator (5) has a housing (6), the pressure roller (19) being mounted on a slide (18) which is movable relative to the housing (6), preferably linearly displaceable is. Actuator according to one of claims 1 to 13, characterized in that the actuating part (29) is integrally formed together with the actuating arm (9). Arrangement with a movable furniture part (3) and with an actuator (5) according to one of claims 1 to 14 for moving the movable furniture part (3).

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