JP6258489B2 - Furniture drive - Google Patents

Description

The present invention relates to a furniture drive device for ejecting a movable furniture portion from a closed end position with respect to a furniture body. This furniture drive is
A housing;
An electric drive installed in or on the housing;
An ejection lever that can be driven by the electric drive unit and is installed so as to pivot around the pivot axis with respect to the housing;
A ram that ejects the movable furniture part,
This ram is linearly movable and can be driven by an ejection lever.

  The invention further relates to furniture having a movable furniture part and a furniture drive described below.

  Common furniture drives for ejecting furniture parts mounted in a movable state are described, for example, in WO 2004/101919 A1, EP 2380459 A1 and WO 2001/130758 A1.

  AT504838B1 discloses a furniture drive with a motor driven ejector lever. This lightly contacts the stop of the ram at the closed end position of the movable furniture part. The ram forms part of the acting force transmission device, and by using the ram, the acting force generated during the ejection process is transferred to the movable furniture via the intermediate space between the ejection lever and the movable furniture part. Can communicate to the part. In this way, movable furniture parts can also be ejected, but they only enter the furniture body only slightly or not at all (movable furniture parts are furniture doors, furniture flap doors, or drawers. The depth (length) is substantially smaller than the depth of the furniture body).

  The object of the present invention is to provide a furniture drive device of the general kind as mentioned at the beginning of this specification, which has a simplified structure and is more compact.

  According to the invention, this object is achieved by the features of claim 1. Further embodiments of the invention are defined in the dependent claims.

  According to the present invention, the furniture drive device includes a conversion mechanism that converts the turning motion of the ejection lever into a linear motion of the ram, and the conversion mechanism includes at least an integral angle lever (a square lever). The angle lever is supported so as to pivot around the rotation axis, has two lever arms, and one (first) lever arm of the angle lever interacts with the ejection lever, The other (second) lever arm of the angle lever interacts with a linearly movable ram, and the rotational axis of the angle lever and the pivot axis of the ejection lever are configured to be immovable relative to each other. ing.

  By using a conversion mechanism with an angle lever, two functions can work simultaneously. One is that the conversion ratio can be variably adapted by selecting the geometry of the angle lever, and the other is that the acting force can be changed by the angle lever. Yes, ejection is possible by changing the angle of the ram with respect to the (primary) ejection direction of the ejection lever. In this way, the furniture drive device can be designed in a more compact structure.

  By utilizing a pivotally supported angle lever in which the ejector lever is in sliding or rotational contact with the first lever arm (eg, via a pressure roller installed on the ejector lever) By having a non-linear transmission function, it is possible to provide an extension of the pressure path according to the size and shape of the angle lever. Each angle lever and / or ejection lever can have at least one convex curve for interaction.

  By using the angle lever, when the movable furniture part is ejected from the closed end position (that is, when the electric drive unit (electric drive unit) starts slowly at the beginning), a low-pass transmission (low path transmission) is provided. However, it is possible to provide a high-force transmission (high-strength acting force transmission). Therefore, when starting from the closed end position, a particularly high moment torque is available, and even a heavy weight drawer, flap door or door can be easily ejected from the closed end position. Thereafter, it is possible to reduce the transmission ratio starting from the closed end position of the movable furniture part over a predetermined range of rotation of the angle lever, the force transmission is reduced and the path transmission is increased.

  The two lever arms of the angle lever form an acute angle with each other, and the angle with which the two lever arms are formed relative to each other is preferably constant at all operating positions of the angle lever. In a simple embodiment, the first lever arm and the second lever arm of the angle lever can be formed integrally.

  Alternatively, the angle at which the first lever arm and the second lever arm of the angle lever are relatively formed can be adjusted by the adjusting device, preferably continuously. In this way, for example, a field engineer can selectively adapt the position of the ram. However, the angle formed between the two lever arms of the angle lever is fixed during the operation in order to transmit the required acting force to the movable furniture part.

  Further details and advantages of the invention are provided by the embodiments illustrated in the drawings.

It is a perspective view of the furniture which has the furniture main body and the movable furniture part which can move with respect to it. It is two types of perspective views which show the drive device for furniture shown in FIG. It is two types of perspective views which show the drive device for furniture shown in FIG. It is an exploded view of the drive device for furniture. It is a perspective view which shows in order the ejection process of the ram started from a closed end position. It is a perspective view which shows in order the ejection process of the ram started from a closed end position. It is a perspective view which shows in order the ejection process of the ram started from a closed end position. It is a perspective view which shows in order the ejection process of the ram started from a closed end position.

  FIG. 1 is a perspective view of a furniture 1 having a furniture body 2 and a furniture portion 3 that can move relative thereto. In the illustrated embodiment, the movable furniture part 3 is formed as a door and is attached to the furniture body 2 so as to turn around a vertical extension axis. A furniture drive device 4 having a ejection lever 12 mounted in a swivel manner is arranged on a cabinet cover 7 of the furniture body 2 and is moved from a closed end position to an open end position by a ram 6 that is linearly movable. The movable furniture part 3 can be ejected. In order to achieve this object, the movable furniture part 3 extends above the cabinet cover 7 of the furniture body 2, and the rear wall of the movable furniture part 3 forms a stop surface for the ram 6 that moves outward. ing.

  FIG. 2 is an enlarged view of the furniture driving device 4 arranged on the furniture body 2 as shown in FIG. The furniture drive device 4 is attached to a base plate 8 attached to the furniture body 2, and a housing 9 in which an electric drive unit 10 having a transmission function for electrically driving the ejection lever 12 is installed. Is included. The ejection lever 12 is attached to the housing 9 so as to turn around a turning shaft 11 that preferably travels in a vertical direction when attached. The electric drive unit 10 is activated by a sensor that detects movement (in the closing direction) of the movable furniture portion 3 that is manually performed by the user. A simple activation of the furniture drive 4 can be performed by a touch latch function. In order to achieve this object, a sensor, preferably a rotary potentiometer, can be used for detecting the angular position of the ejection lever 12 and the sensor signal can be used to control or adjust the furniture drive 4. The electric driving unit 10 can be controlled or adjusted by using this control device or adjusting device. The ejection lever 12 includes a ejection surface 14 disposed between the pivot shaft 11 of the ejection lever 12 and the lever free end 13, and the ejection surface 14 is connected to the first lever arm 18 of the angle lever 15. Cooperate. The angle lever 15 includes a ram 6 that can move linearly and a second lever arm 19 that cooperates, preferably via a curved push lever 20 (FIG. 2b). The angle lever 15 is supported so as to turn around a rotating shaft 16 that is stationary with respect to the turning shaft 11. The angle lever 15 forms part of a conversion mechanism that converts the turning motion of the ejection lever 12 into the linear motion of the ram 6.

  FIG. 2 b is another perspective view of the furniture drive device 4. The angle lever 12 has a ejection surface 14 disposed between the turning shaft 11 and the lever free end 13, and the ejection surface 14 cooperates with the first lever arm 18 of the angle lever 15. The first lever arm 18 and the second lever arm 19 of the angle lever 15 form a relatively acute angle. The angle lever 15 is attached so as to turn around the rotary shaft 16 of the slewing bearing device (bearing) 21, and the rotary shaft 16 is installed stationary in parallel with the rotary shaft 11 of the ejection lever 12. ing. As shown in FIG. 2 b, the position of the ejection lever 12 corresponds to the open position of the movable furniture part 3, and the angle lever 15 with the first lever arm 18 is located on the ejection lever 12 in the vicinity of the turning shaft 11. Lightly touches a part of the ejection surface 14. The portion where the ejection lever 12 and the first lever arm 18 contact each other is the direction of the free end 13 of the ejection lever 12 from the vicinity of the turning shaft 11 of the ejection lever 12 when the movable furniture portion 3 is ejected. The lever arm of the acting force is changed substantially evenly. One end of the second lever arm 19 is hingedly connected to a curved push lever 20, and the push lever 20 drives the ram 6 via a movable slider 22. The ram 6 can move linearly in the direction of the arrow 32 with respect to the guide element 17 attached to the base plate 8.

  FIG. 3 shows the furniture drive device 4 in an exploded view. A guide device 23 for guiding the slider 22 is attached to the base plate 8. A holder 24 for receiving the shock absorber 25 is installed on the slider 22 so that the movement of the movable furniture portion 3 in the closing direction can be buffered. In the embodiment shown, the shock absorber 25 is preferably formed as a hydraulic piston and cylinder part. The housing 9 of the electric drive part 10 can be releasably connected to the receiving shape part 23 by a snap-shaped connection, and the receiving shape part 23 is screwed to a bracket 24 that is vertically installed in the mounted state. . The furniture drive unit 4 includes a ejection lever 23 that is mounted to pivot about the pivot shaft 11 and in the mounted state includes a ejection surface 14 that cooperates with the first lever arm 18 of the angle lever 15. Have. A spring device 28 comprising at least one tension spring 29 formed as a coil spring can be adjusted to the slider 22 at the first end portion and preferably to the base plate 8 at the second end portion. Moored at the spring base. After the ejection process, the ejection lever 12 and / or the angle lever 15 can be returned to the operation ready position by the spring device 28, which corresponds to the closed end position of the movable furniture part 3. The first end 31 of the holding device 30 is arranged at the free end of the ram 6 so that the movable furniture part 3 is held in the fully closed position and / or to the fully closed position towards the end of the closing action. It becomes movable. In order to achieve this purpose, a part 31 is arranged at the free end of the ram 6 and magnetically cooperates with a corresponding part that is installed or formed on the movable furniture part 3.

  4 to 4d show the ejection process of the ram 6 in order. FIG. 4 a shows the closed position of the ram 6, which corresponds to the closed end position of the movable furniture part 3. The free end of the first lever arm 18 of the angle lever 15 is in light contact with the ejection surface 14 of the ejection lever 12 adjacent to the turning shaft 11 of the ejection lever 12. At the start of the ejection process, a lever arm with a relatively small acting force is provided (ie the pivot 11 on which the ejection lever 12 and the first lever arm 18 of the angle lever 15 contact each other). The distance between the area and the predetermined torque M of the electric drive unit 10 is transmitted to a large acting force acting on the movable furniture portion 3. The region where the first lever arm 18 of the angle lever 15 is in contact with the ejection surface 14 of the ejection lever 12 starts from the region adjacent to the turning shaft 11 of the ejection lever 12 and moves to the ejection surface 14 during the ejection process. Along the direction of the lever free end 13 of the ejector lever 12, an equal change in the lever arm of the acting force is provided, and the jumping phenomenon of the acting force is avoided. The free end of the second lever arm 19 of the angle lever 15 cooperates with the ram 6 directly or indirectly. In the illustrated embodiment, the second lever arm 19 of the angle lever 15 is connected to the slider 22 of the ram 6 via a push lever 20 which is preferably curved at least.

  FIG. 4 b shows a further extended position of the ram 6. The ejection lever 12 driven by the electric drive unit 10 rotates around the turning shaft 11, and the angle lever 15 can rotate around the rotation shaft 16. Due to this rotation of the angle lever 15, the slider 22 in which the ram 6 can move linearly also moves further in the ejection direction in the direction indicated by the arrow 32.

  FIG. 4c shows a further extended position of the ram 6 in which the shock absorber 25 in the form of a linear damper returns to the ready position for the next shock stroke by the acting force of a return spring (not shown). Yes. The movement of the ram 6 is realized by a lowered force transmission which is reduced by further ejection movement of the ejection lever 12. Accordingly, the acting force transmitted to the ram 6 is reduced, and an extension movement with an increased speed of the ram 6 is provided.

  FIG. 4 d shows the fully extended position of the ram 6. By holding the rear wall portion of the movable furniture portion 3, the user can release the movable furniture portion from the magnetic coupling of the portion 31, and can move the movable furniture portion 3 further to the open position side. On the other hand, if the magnetic coupling between the portion 31 of the holding device 30 and the movable furniture portion 3 is not released by the user, the movable furniture portion 3 will be pulled in with the magnetic coupling maintained after a predetermined time has elapsed. . This is executed by the control device or adjustment device of the furniture drive device 4 that returns the ejection lever 12, and the spring device 28 is used to return the ram 6 and to the closed end position (ram). The return movement of the movable furniture part 3 (magnetically coupled to 6) is also performed. Of course, a corresponding part of the holding device 30 is provided or formed on the movable furniture part 3 so that a magnetic attractive force can be provided between the part 31 and the movable furniture part 3. Alternatively, for example, at least a part of the movable furniture portion 3 is made of metal, and if appropriate, a plastic cover is inserted between the movable furniture portion 3 to reduce noise generation, and the magnetically formed portion 22 is moved to the movable furniture. It is also possible to act directly on the metal region of the part 3.

  The particular advantages of the present invention are also clear. That is, the structure shown in the figure enables the direction change of the acting force of the ram 6 acting in the ejection direction of the ejection lever 12 and the ejection with the angle given in association therewith. In FIG. 4c, the direction 32 of linear movement of the ram 6 running substantially parallel to the longitudinal direction (L) of the housing 9 of the furniture drive 4 is shown.

  Therefore, the furniture drive device 4 provided with the angle lever 15 can provide a very large ejection force, so that the furniture drive device 4 ejects a refrigerator door or a chest-type freezer flap door in particular. Can also be used. Due to the general internal low pressure environment of refrigerators and freezers, opening them can often be difficult, but is further hindered by the additional magnetic sealing design (sealing the cooling compartment). The furniture drive 4 according to the present invention can solve this problem, where the furniture drive 4 can be formed in a general modular structure, apart from the electrical cord that would be used. Only the ram 6 extends out of the device of this general structure.

Claims (14)

A furniture drive device for ejecting the movable furniture part (3) from the closed end position with respect to the furniture body (2),
A housing (9);
An electric drive (10) installed in or on the housing (9);
An ejection lever (12) which can be driven by the electric drive unit (10) and which is installed so as to pivot around the pivot axis (11) with respect to the housing (9);
A ram (6) for ejecting the movable furniture part (3);
The ram (6) is linearly movable and can be driven by the ejection lever (12);
The furniture drive device includes a conversion mechanism (5) that converts the turning motion of the ejection lever (12) into the linear motion of the ram (6), and the conversion mechanism (5) has a rotating shaft ( 16) includes at least one angle lever (15) mounted so as to pivot about the circumference of the lever and having two lever arms (18, 19), the first lever arm of the angle lever (15) (18) interacts with the ejection lever (12), and the second lever arm (19) of the angle lever (15) interacts with the linearly movable ram (6), the angle lever The rotational axis (16) of (15) and the pivot axis (11) of the ejection lever (12) are configured so that their positional relationship does not change,
The first lever arm (18) of the angle lever (15) has a free end that contacts the ejection surface (14) of the ejection lever (12) at the closed end position of the movable furniture portion (3). And
During the ejection operation, the region where the first lever arm (18) of the angle lever (15) is in contact with the ejection surface (14) of the ejection lever (12) is the area of the ejection lever (12). A furniture drive device, wherein the furniture drive device moves from the region adjacent to the pivot shaft (11) along the ejection surface (14) toward the free end (13) of the ejection lever (12) . The furniture driving device according to claim 1, wherein the ejection lever (12) contacts the first lever arm (18) of the angle lever (15) so as to slide or roll. Each of the ejection lever (12) and / or the first lever arm (18) of the angle lever (15) has at least one convex curved portion so as to engage with each other. The furniture driving device according to claim 1 or 2, characterized in that: Said second lever arm (19) of the angle lever (15), and wherein the linearly movable ram (6) and at least one cooperating action, which is connected to a push lever (20) The furniture drive device according to any one of claims 1 to 3 . The drive device for furniture according to claim 4, wherein the push lever (20) has a curved shape. According to any of claims 1-5 wherein said said first lever arm of the angle lever (15) (18) the second lever arm (19), characterized in that to form an acute angle with respect to one another Furniture drive. The angle at which the first lever arm (18) the second lever arm (19) forms relative to each other, claims, characterized in that constant across all of the action position of the angle lever (15) 6. The furniture drive device according to 6 . According to any one of claims 1 to 7, characterized in that it is integrally formed with the said first lever arm of the angle lever (15) (18) and the second lever arm (19) Drive unit for furniture. A spring device (28) is further included. The spring device (28) causes the ram (6), the ejection lever (12) and / or the angle lever (15) to be in an operation ready position after the ejection operation is completed. 9. The furniture drive device according to claim 1 , wherein the furniture drive device can return again, and the position corresponds to the closed end position of the movable furniture part (3). The direction (32) of the linear movement of the ram (6) travels parallel to the longitudinal direction (L) of the housing (9) of the furniture drive device. The drive device for furniture as described. The furniture which has a movable furniture part and the drive device for furniture in any one of Claim 1 to 10. 12. Furniture according to claim 11, characterized in that the ram (6) contacts the movable furniture part (3) in its closed position. 12. A holding device (30) is included, characterized in that the movable furniture part (3) is held in the fully closed position by means of the holding device (30) and / or can be moved to the fully closed position. Or the furniture of 12. The holding device (30) comprises at least two parts (31), the first part (31) being arranged or provided on the ram (6), the second part being the movable part 14. Arranged or provided on a furniture part (3), characterized in that in the closed position of the movable furniture part (3), the two parts (31) exert a magnetic attraction with respect to each other. Furniture.

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