EP2983560A1

EP2983560A1 - Drive device for a movable furniture part

Info

Publication number: EP2983560A1
Application number: EP14723309.2A
Authority: EP
Inventors: Ingo Gasser; Michael Blum; Hermann Hämmerle
Original assignee: Julius Blum GmbH
Current assignee: Julius Blum GmbH
Priority date: 2013-04-12
Filing date: 2014-03-26
Publication date: 2016-02-17
Anticipated expiration: 2034-03-26
Also published as: JP6155385B2; MY182529A; CN105188478A; CN105188478B; EP2983560B1; AT514059B1; JP2016514576A; AT514059A4; WO2014165878A1; US20160007748A1; KR101860623B1; US9532648B2; KR20150126049A; ES2682032T3

Abstract

The invention relates to a drive device (1) for a movable furniture part (2), comprising an ejecting element (3) for moving the movable furniture part (2) from a closed position (SS) to an open position (OS), an ejection force accumulator (4) that applies force to the ejecting element (3), and a locking device (5) for locking the ejecting element (3) by means of a locking element (6) in a locking section (V), wherein the locking device (5) can be unlocked by overpressing the movable furniture part (2) from the closed position (SS) to an overpressing position (ÜS) in the closing direction (SR), wherein the movable furniture part (2) can be moved in the opening direction (OR) by means of the ejection force accumulator (4) and the ejecting element (3), wherein the locking device (5) has a pre-locking section (VV) for the locking element (6), wherein the locking element (6) is moved from the pre-locking section (VV) into the locking section (V) via a push-through evasion section (D) by pushing the movable furniture part (2) through during closing into a push-through position (DS) lying behind the closing position (SS) in the closing direction (SR).

Description

Drive device for a movable furniture part

The invention relates to a drive device for a movable furniture part, comprising an ejection element for moving the movable furniture part from a closed position to an open position, the ejection element kraftbeaufschlagenden ejection force memory and a locking device for locking the ejection element via a locking element in a locking portion, wherein by overpressing the movable furniture part the closed position in the closing direction in an overpressure position, the locking device can be unlocked, whereby the movable furniture part is movable in the opening direction by the ejection force accumulator and the ejection element. In addition, the invention relates to a piece of furniture with a furniture body, a movable furniture part relative to the furniture part and a drive device according to the invention for the movable furniture part.

In the furniture fitting industry, drive devices have been known for many years with which, by pressing on the movable furniture part (eg a drawer), an unlocking takes place from the furniture carcass and subsequently the movable furniture part is opened or ejected. Such drive devices have a so-called touch-latch mechanism. In this mechanism, the movement for closing the drawer from the open position and the movement for unlocking or opening the drawer from the closed position in the same direction, namely in the closing direction. In a normal gentle closing (manually or by a retraction device), the drawer or the movable furniture part is held by the locking device in the closed position. But if a too strong pressing or pushing the drawer up to the end stop, the ejection device can not lock or is immediately triggered again and placed in the overpressure, whereby no safe closing is guaranteed in such a malfunction of the movable furniture part. To solve this problem is known from the priority senior but not previously published Austrian patent application A 52/2012 a blocking element to prevent the movement in the overpress position at too fast closing movement.

The object of the present invention is to provide an alternative possibility to prevent immediate triggering or unlocking of the ejection device even in case of incorrect operation by pushing the movable furniture part.

This is achieved by a drive device according to claim 1. Accordingly, it is provided that the locking device has a pre-locking portion for the locking element, wherein by pressing the movable furniture part when closing in a closing direction behind the closed position push-through position, the locking element passes from the pre-locking section via a push-through avoidance into the locking section. Thus, the first locking element does not immediately enter the locking section in the locking section but is held in Vorverriegelungsabschnitt, which has its own Durchdrück- escape section, from which the locking element can not be ejected directly, but first enters the actual locking section. To make this possible, the locking portion should be different from the pre-locking portion. In particular, the locking portion should be spaced from the pre-locking portion in the opening direction of the movable furniture part from each other. In other words, the pre-locking portion lies in the closing direction behind the locking portion.

As such, such push-through protection may be useful in various types of touch-latch mechanisms, such as mechanisms that operate on the ballpoint pen principle. Preferably, however, it is provided that the locking device is a, preferably heart-shaped, guideway for, preferably peg-shaped trained, locking element, wherein the locking element in the locking portion in a, preferably trough-shaped, latching region of the, preferably heart-curved, guideway is durable or lockable. In the embodiment of the locking device with such a heart-shaped guide track is preferably provided that the guide track successively a, preferably straight, clamping portion, a preferably curved deflection portion, the pre-locking portion, the locking portion in the form of a trough-shaped detent area (detent recess), a rejection - Has or Entriegelungsschräge and an ejection section. In order to enable the normal ejection or unlocking is further preferably provided that the guideway between the Entriegelungs- or Abweisschräge and the ejection section has a second, separate from the push-through evasion section escape section for the locking element. According to a particularly preferred embodiment of the present invention it is provided that in the pre-locking portion a holding element for the locking element is arranged or formed.

According to a first embodiment of this holding element can be provided that the guide track in the pre-locking portion as a holding element has a straight abutment surface for the locking element. This straight abutment surface is aligned so that the force acting on the locking element from the ejection force holds the locking element on this abutment surface. Preferably, the forces act substantially normal on this straight contact surface.

As a second embodiment of this holding element can be provided that the holding element in the form of a movable damping element, preferably in the form of a rotary damper, is formed. Instead of a rotary damper, of course, a translationally movable damper piston or the like can be used. Preferably, it is provided for this damping element, that the damping element comprises a damped rotatably mounted gear, wherein at least one tooth of the gear in the pre-locking portion of the locking element contacted and damped in the direction of locking portion is movable. Thus, with this damping element, the locking element is not held statically in the pre-locking section, but slowly moved in the direction of the locking section. If, therefore, during this time, where the locking element is still in abutment with the damping element, a push-through, the locking element initially differs in the push-through avoidance, instead of directly pass through the Abweisungs- or Entriegelungsschräge in the ejection section. As is known per se, it is further provided that the ejection force memory can be loaded by moving the movable furniture part in the opening direction and / or in the closing direction. Favor is also provided for this invention, that only after complete loading of the ejection force accumulator, the ejection element can be locked via the locking element in the pre-locking section. That is, the ejection force accumulator is fully tensioned when locked over the locking member in the pre-locking portion.

Preferably, the drive device has a retraction device for retracting the movable furniture part from an open position to the closed position, wherein - when the locking element reaches the pre-locking section - the movable furniture part is in an open position and from this open position, the movable furniture part by the retractor in the Closed position is movable. Especially when the holding element is designed as a straight abutment surface, it is preferably provided for the movement of the locking element in the locking portion that only when moving the movable furniture part by the retraction device in the closed position, the locking element from the pre-locking portion into the locking portion is movable. It is particularly advantageous if the locking element is movable in dependence of the retraction of the pre-locking portion in the locking portion. Protection is also desired for a piece of furniture with the features of claim 16. In principle, the drive device can be arranged on the furniture body and eject the movable furniture part via the ejection element. Preferably, however, it is provided that the drive device is arranged on the movable furniture and arranged with the ejection element engageable driver on the furniture body. Thus, the drawer pushes over the drive device, so to speak, even from the furniture body.

Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings. Show:

1 schematically different positions of a movable furniture part in a furniture body,

Fig. 2 is an exploded view of a first embodiment of a

Driving device

Fig. 3 to 13 representations of the drive device with the

Locking element in different positions of the guideway and

14 and 15, a second embodiment of a drive device with a damping element in the pre-locking section.

In Fig. 1, a furniture 14 with a furniture body 15 and a total of four movable furniture parts 2 is shown generally. Each furniture part 2 consists of at least one thrust receptacle 17 and a front panel 18. The movable furniture parts 2 are attached via a pull-out 21, consisting of a drawer rail 19, a carcass rail 20 and optionally a center rail, not shown, on the furniture body 15. In the uppermost drawer, it can be seen that the drive device 1 together with the ejection element 3, the locking element 6 which is movable in the guide track 7 and the ejection force accumulator 4 is fastened or arranged on the movable furniture part 2 or on its drawer rail 19. The locking device 5 is formed by the guide track 7 and the locking element 6. On the carcass rail 20 or the furniture body 15th itself a driver 16 is arranged, with which the ejection element 3 is at least partially engaged. This top drawer is in the open position OS. When the drawer is moved further in the closing direction SR from this open position OS, the locking element 6 enters the pre-locking section VV of the guide track 7 (see FIG. 5, described in detail below). In this position (second drawer from the top) of the ejection force memory 4 is fully stretched and the movable furniture part 2 can then be moved from the only schematically illustrated and integrated in the pull-21 21 retraction device in the closed position SS (third drawer from above). Starting from this closed position SS, the movable furniture part 2 passes in a normal unlocking and opening process in the overpressure position ÜS (bottom drawer in Fig. 1). This overpressure corresponds with respect to the movable furniture part 2 also exactly the Druchdrückstellung DS. In the drive device 1 itself, however, the locking element 6 is in different sections (push-through escape section D or second escape section W). After the normal overpressure in the closing direction SR, the movable furniture part 2 is ejected by the driving device 1 in the opening direction OR. 2 shows an exploded view of the essential components of a first exemplary embodiment of the drive device 1. This drive device 1 is fastened on the base plate 23 on the movable furniture part 2 or on the drawer rail 19. In this base plate 23, in turn, the cover 22 is mounted, in the base plate 23, the guide track 7 with the clamping portion S, the deflection L, the pre-locking portion VV, the push-through D evasion, the locking portion V, the Abweisungs- and Entriegelungsschräge E. , the second escape portion W and the discharge portion A are formed. The position of this base plate 23 in the closed position SS relative to the furniture body 15 can be adjusted via the depth adjustment wheel 24. The ejection element 3 is mounted movably relative to the cover 22 or to the base plate 23. The ejection force accumulator 4 is held on the one hand via the spring base 25 on the base plate 23 and on the other hand via the spring base 26 on the ejection element 3. This ejection energy storage 4 is as a tension spring educated. At the ejection element 3 is the pivot bearing 27, on which the locking lever 28 is rotatably supported via the rotation axis X. At the front end of the locking lever 28, the pin-shaped and engaging in the guide track 7 locking element 6 is arranged. Sectionally connected to the ejection element 3 is the Einziehschlitten 30, on which the catching arm 29 is rotatably mounted. In addition, this Einziehschlitten 30, the latching stopper 35 and the stopper 32, while the locking lever 28 of the projection 34 and the pivot stop 33 is formed. In Fig. 3, the drive device 1 is shown when the movable furniture part 2 is in an open position OS. In this case, the tentacle 29 is pivoted into its release position. The ejection force memory 4 is relaxed. The locking element 6 is in its initial position at the beginning of the clamping section S of the guideway. 7

Now, if the movable furniture part 2 together with the drive device 1 in, as shown in Fig. 4, is moved in the closing direction SR, the body-fixed driver 16 comes into abutment with the Einziehelement 30 and moves the Einziehschlitten 30 coupled ejection element 3 relative to the cover 23rd in which the locking element 6 moves along the tensioning section S and at the same time the ejection force accumulator 4 fastened to the ejection element 3 is tensioned. During this closing movement, the catch 16 is held or caught in the catching area 31 between the catching arm 29 located in the catching position and the pulling-in carriage 30.

This, normally manual closing movement is continued until the position shown in FIG. 5 (still an open position OS) is reached. Due to the fact that the locking element 6 moves in the direction of the pre-locking section VV due to the curved configuration of the deflection section L, the entire locking lever 28 also pivots counterclockwise around the rotation axis X, whereby the stop 32 of the insertion carriage 30 is disengaged from the locking lever 28 trained projection 34 passes, which in turn causes the ejection element 3 from the Einziehschlitten 30 and thus of the manual power is decoupled. Once this decoupling is done, the force of the now completely stretched ejection force memory 4 acts directly on the locking element 6. Since this locking element 6 is at this moment exactly in the pre-locking portion VV, this force of the ejection force accumulator 4 acts substantially normal to the holding member 9 forming straight contact surface F of the guideway 7. Thus, in this position shown in FIG. 5, the ejection element 3 is locked in the pre-locking portion VV (see in detail Fig. 5a). Furthermore, it can be seen in detail from FIG. 5 b that the pivoting stop 33 still protrudes by the angle α.

As a result, the retracting device 13, shown only schematically in FIG. 6, can then move the movable furniture part 2 together with the drive device 1 further in the closing direction SR. As soon as during this movement the latching stop 35 formed on the drawing carriage 30 abuts on the pivoting stop 33 of the locking lever 28 (see FIG. 6b), the locking lever 28 pivots further counterclockwise about the axis of rotation X, whereby the locking element 6 emerges from the pre-locking section VV moves and moves in the direction of the locking portion V forming trough-shaped latching area 8 (see Fig. 6a).

With this release of the locking element 6 from the pre-locking portion VV, the retracting device 13 has, so to speak, performed its last "work", after which the locking element 6 passes, as shown in FIG. 7, into the locking section V by a slight relaxation of the ejection force accumulator 4. Thus, the movable one is located 7a, this slight relaxation movement of the ejection force accumulator 4 also lifts the pivot stop 33 slightly away from the latching stop 35. A normal closing movement sequence without incorrect operation is described with reference to FIGS. 3 to 7. However, if the manual closing movement does not stop once the ejection force memory 4 is stretched, but the movable furniture part 2 even further in the closed position SS and beyond in the Thrusting DS is pressed as shown in FIG. 8, the locking member 6 is moved from pre-locking portion VV in the push-through D evasion D until the Einziehschlitten 30 abuts the end 37 of its guide 36 in the cover 23 or until the front panel 18 on the furniture body 15th strikes.

If then the faulty operation was finally noticed or the movable furniture part 2 is released due to the wrong way completely manually performed closing process, the locking element 6 passes due to the relaxation of the ejection force memory 4 from the push-Dodge D in the locking portion V and the closed position SS shown in FIG 9 is reached. Starting from this closed position SS, the locking device 5 can then be unlocked at any time by a user by overriding the movable furniture part 2 in the closing direction SR. As is known per se, the locking element 6 passes via the deflection and unlocking slope E into the second escape section W (see FIG. 10), as a result of which the overpressure position ÜS according to FIG. 10 is reached.

Once then the manual unlocking movement is completed, the ejection force accumulator 4 pulls the ejection element 3 relative to the cover 23 and the base plate 22, whereby the movable furniture part 2 is ejected or attached to the movable furniture part 2 drive device 1 repels the body-fixed driver 16. In this case, the locking element 6 moves along the ejection section A of the guide track 7 and the movable furniture part 2 enters the open position OS shown in FIG. Upon further opening movement of the Einziehschlitten 30 is again coupled to the ejection element 3, wherein the locking lever 28 is pivoted and the locking element 6 is moved back toward the starting position. At the same time, as shown in FIG. 12, the carrier 16 is released again by the pivoting of the catching arm 29.

In Fig. 13, the locking element 6 is again in its initial position, the tentacle 29 is again completely open and located in the open position OS movable furniture part 2 is independent of the driver 16 freely movable.

As an alternative to formed as a straight contact surface F retaining element 9 is shown in Fig. 14, that the holding element 9 is formed as a damping element 10 and in concrete as a gear 1 1. As soon as the locking element 6 has reached the position according to FIG. 14a, it is moved by the ejection force accumulator 4 or by a corresponding deflection in the direction of the locking section V. When the locking element 6 rests against the tooth 12 projecting into the pre-locking section VV, the movement of the locking element 6 triggered by the ejection force accumulator 4 is damped, in which the toothed wheel 1 rotatably mounted in a viscous mass moves only very slowly counterclockwise. Once the gear has moved by about 30 degrees, the locking member 6 no longer contacts the tooth 12 and enters the locking portion V of FIG. 15, whereby the movable furniture part 2 is in the closed position SS. Due to the fact that the locking element 6, depending on the duration of the rotational movement of the damping element 10, is relatively long in the pre-locking section VV, when the movable furniture part 2 is pushed through (incorrect operation), the locking element can move into the push-through avoidance section D and from there arrive after the end of the wrong operation in the actual locking section V. Thus, an improved Druchdrückschutz is created by the present invention by the locking element 6 is not immediately locked in the locking portion V, but before reaching the closed position SS of the movable furniture part 2 in a pre-locking portion VV is locked so that when pushed through the push-through avoidance section D for the locking element 6 is available.

Claims

Patent claims

Drive device (1) for a movable furniture part (2), with

- an ejection element (3) for moving the movable furniture part (2) from a closed position (SS) to an open position (OS),

- an ejection force accumulator (4) which applies force to the ejection element (3) and

- a locking device (5) for locking the ejection element (3) via a locking element (6) in a locking section (V), by overpressing the movable furniture part

(2) the locking device (5) can be unlocked from the closed position (SS) in the closing direction (SR) into an overpressure position (ÜS), whereby the ejection force accumulator (4) and the ejection element

(3) the movable furniture part (2) can be moved in the opening direction (OR),

characterized in that the locking device (5) has a pre-locking section (VV) for the locking element (6), by pushing the movable furniture part (2) when closing into a push-through position lying behind the closed position (SS) in the closing direction (SR). (DS) the locking element (6) passes from the pre-locking section (VV) via a push-through escape section (D) into the locking section (V).

Drive device according to claim 1, characterized in that the locking section (V) is different from the pre-locking section (VV), the pre-locking section (VV) being behind the locking section (V) in the closing direction (SR).

Drive device according to claim 1 or 2, characterized in that the locking device (5) has a, preferably heart-shaped, guide track (7) for the, preferably peg-shaped, locking element (6), the locking element (6) being in the Locking section (V) can be held in a, preferably trough-shaped, locking area (8) of the preferably heart-shaped guide track (7).

4. Drive device according to claim 3, characterized in that the guide track (7) successively has a, preferably straight, clamping section (S), a, preferably curved, deflection section (L), the pre-locking section (VV), the locking section (V) in the form of a, preferably trough-shaped, locking area (8), a rejection or unlocking slope (E) and an ejection section (A).

5. Drive device according to claim 4, characterized in that the guide track (7) between the unlocking or deflecting slope (E) and the ejection section (A) has a second escape section (W) for the locking element, separate from the push-through escape section (D). (6).

6. Drive device according to one of claims 1 to 5, characterized in that a holding element (9) for the locking element (6) is arranged or formed in the pre-locking section (VV).

7. Drive device according to claim 6, characterized in that the guide track (7) in the pre-locking section (VV) has a straight contact surface (F) for the locking element (6) as a holding element (9).

8. Drive device according to claim 6, characterized in that the holding element (9) is designed in the form of a movable damping element (10), preferably in the form of a rotation damper.

9. Drive device according to claim 8, characterized in that the damping element (10) has a dampened, rotatably mounted gear (1 1), at least one tooth (12) of the gear (1 1) in the pre-locking section (VV) from the locking element ( 6) can be contacted and movable in the direction of the locking section (V).

10. Drive device according to one of claims 1 to 9, characterized in that the ejection force accumulator (4) can be loaded by moving the movable furniture part (2) in the opening direction (OR) and / or in the closing direction (SR).

11. Drive device according to claim 10, characterized in that only after the ejection force accumulator (4) has been fully charged can the ejection element (3) be locked via the locking element (6) in the pre-locking section (VV).

12. Drive device according to one of claims 1 to 9, characterized by a retraction device (13) for retracting the movable furniture part (2) from an open position (OS) into the closed position (SS).

13. Drive device according to claim 12, characterized in that - when the locking element (6) reaches the pre-locking section (VV) - the movable furniture part (2) is in an open position (OS) and from this open position (OS) the movable Furniture part (2) can be moved into the closed position (SS) by the retraction device (13).

14. Drive device according to claim 12 or 13, characterized in that only when the movable furniture part (2) is moved by the retraction device (13) into the closed position (SS) does the locking element (6) move from the pre-locking section (VV) into the locking section ( V) is movable.

15. Drive device according to claim 14, characterized in that the locking element (6) can be moved from the pre-locking section (VV) into the locking section (V) depending on the retraction device (13).

16. Furniture (14) with a furniture body (15), a furniture part (2) movable relative to the furniture body (15) and a drive device (1) according to one of claims 1 to 15 for the movable furniture part (2).

17. Furniture according to claim 16, characterized in that the drive device (1) is arranged on the movable furniture (2) and a driver (16) which can be brought into engagement with the ejection element (3) is arranged on the furniture body (15).