EP2983560B1 - Drive device for a movable furniture part - Google Patents

Description

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 already been known for many years with which, by pressing on the movable furniture part (eg a drawer), an unlocking takes place from the furniture body and subsequently the movable furniture part is opened or ejected. Such drive devices have a so-called touch-latch mechanism. Examples of touch-latch mechanisms with heart curved locking section are in DE 10 2009 026 141 A1 , of the US 2007/0090735 A1 , of the EP 2 279 680 A1 and the DE 20 2008 001 884 A1 shown. 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 ejector can not lock or is immediately released again and placed in the overpressure position, which no safe closing is guaranteed in such a malfunction of the movable furniture part.

To solve this problem is from the earlier priority but not previously published Austrian patent application A 52/2012 (equals to AT 511 938 B1 ) a blocking element known 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 inter alia 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 locking element does not enter immediately upon locking in the locking portion but is held in the Vorverriegelungsabschnitt, which has its own push-through avoidance portion, from which the locking element can not be directly ejected, but first enters the actual locking portion. 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.

In itself, such push-through protection may be useful in various embodiments of touch-latch mechanisms, such as those, for example Mechanisms that work on the pen principle. According to the invention, however, it is provided that the locking device has a, preferably heart-shaped, guide track for the, preferably pin-shaped, locking element, wherein the locking element in the locking portion in a, preferably trough-shaped, latching region of the, preferably cardioid, 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 the invention, it is provided that a holding element for the locking element is arranged or formed in the pre-locking section.

According to a first embodiment of this holding element is provided according to the invention that the guide path in the pre-locking portion as a holding element has a straight abutment surface for the locking element, said straight abutment surface is aligned so that the force acting on the ejection force from the locking element, the locking element on this abutment surface holds and the forces act essentially normal on this straight contact surface.

As a second embodiment of this holding element is inventively provided that the holding element in the form of a movable damping element, preferably in the form of a rotary damper, is formed. According to the invention, it is provided for this damping element that the damping element has a damped rotatably mounted gear, wherein at least one tooth of the gear in Pre-locking portion of the locking element is contacted and attenuated in the direction of the locking portion 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 retraction device 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 is movable into the locking portion. 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 sought for a piece of furniture with the features of claim 11. In principle, the drive device can be arranged on the furniture body and eject the movable furniture part on 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.

Fig. 1

schematisch verschiedene Stellungen eines bewegbaren Möbelteils in einem Möbelkorpus,

Fig. 2

die Explosionsdarstellung eines ersten Ausführungsbeispieles einer Antriebsvorrichtung,

Fig. 3 bis 13

Darstellungen der Antriebsvorrichtung mit dem Verriegelungselement in verschiedenen Positionen der Führungsbahn und

Fig. 14 und 15

ein zweites Ausführungsbeispiel einer Antriebsvorrichtung mit einem Dämpfelement im Vor-Verriegelungsabschnitt.

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:

Fig. 1

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

Fig. 2

the exploded view of a first embodiment of a drive device,

Fig. 3 to 13

Representations of the drive device with the locking element in different positions of the guideway and

FIGS. 14 and 15

A second embodiment of a drive device with a damping element in the pre-locking section.

In Fig. 1 is generally a piece of furniture 14 with a furniture body 15 and a total of four movable furniture parts 2 shown. 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 passes into the pre-locking section VV of the guide track 7 (see in detail the later described Fig. 5 ). 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 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.

Fig. 2 shows in an exploded view, the essential components of a first embodiment of the drive device 1. This drive device 1 is mounted on the base plate 23 on the movable furniture part 2 and on the drawer rail 19. At this base plate 23, in turn, the cover 22 is mounted. In the base plate 23, the guide track 7 is formed with the tension portion S, the deflection portion L, the pre-locking portion VV, the push-through avoidance portion D, the lock portion V, the deflection and unlocking slope E, the second escape portion W, and the discharge portion A. 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

If now the movable furniture part 2 together with the drive device 1 in, as in Fig. 4 drawn, is moved in the closing direction SR, the body fixed carrier 16 comes into abutment with the retraction 30 and moves the ejector 3 coupled to the ejector 3 relative to the cover 23, wherein the locking member 6 moves along the clamping portion S and at the same time on the ejection element attached ejection energy storage 4 is stretched. 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 according to 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 according to Fig. 5 the ejection element 3 is locked in the pre-locking section VV (see in detail Fig. 5a ). Furthermore, in detail of Fig. 5b can be seen that the pivot stop 33 still protrudes by the angle α.

Subsequently, the in Fig. 6 only schematically illustrated retraction device 13, the movable furniture part 2 together with the drive device 1 move further in the closing direction SR. As soon as the latching stop 35 formed on the drawing carriage 30 strikes against the pivot stop 33 of the locking lever 28 (see FIG Fig. 6b ), the lock lever 28 pivots further counterclockwise about the rotation axis X, whereby the lock member 6 moves out of the pre-lock portion VV and moves in the direction of the trough-shaped lock portion 8 forming the lock portion V (see FIG Fig. 6a ).

With this release of the locking element 6 from the pre-locking portion VV, the retracting device 13 has, as it were, performed its last "work", after which the locking element 6 according to Fig. 7 passes through a slight relaxation of the ejection force accumulator 4 in the locking portion V. Thus, the movable furniture part 2 is in the closed position SS. According to Fig. 7a is by this slight relaxation movement of the ejection force accumulator 4 and the pivot stop 33 again slightly lifted from the catch stop 35.

According to the Fig. 3 to 7 a normal closing movement sequence is described without incorrect operation. However, if the manual closing movement does not stop as soon as the ejection force accumulator 4 is tensioned, but the movable furniture part 2 even further in the closed position SS and beyond in the Thrust position DS according to Fig. 8 is pressed, the locking member 6 is moved from the pre-locking portion VV in the push-through avoidance D until the Einziehschlitten 30 abuts the end 37 of its guide rail 36 in the cover 23 or until the front panel 18 abuts the furniture body 15.

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-through avoidance D into the locking portion V and the closed position SS according to Fig. 9 is reached. This position according to Fig. 9 corresponds again to the position according to Fig. 7 ,

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. In this case, as is known, the locking element 6 passes through the Abweisungs- and Entriegelungsschräge E in the second escape section W (see Fig. 10 ), whereby the Überdrückstellung 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 moves into the open position OS according to Fig. 11 ,

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 in Fig. 12 seen, released by the pivoting of the tentacle 29 of the driver 16 again.

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

As an alternative to designed as a straight contact surface F retaining element 9 is in Fig. 14 illustrated that the holding element 9 is formed as a damping element 10 and in concrete as a gear 11. This gear 11 is with its teeth in the pre-locking portion VV of the guideway 7. Once the locking member 6, the position according to Fig. 14a has reached, it is moved by the ejection force memory 4 and by a corresponding deflection in the direction of the locking portion V. When the locking element 6 bears against the tooth 12 protruding 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 11 rotatably mounted in a viscous mass moves only very slowly counterclockwise. Once the gear 11 has moved by about 30 degrees, the locking member 6 no longer contacts the tooth 12 and enters the locking portion V according to 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 (12)

1. A drive device (1) for a moveable furniture part (2), comprising

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

   - an ejection force storage means (4) which acts with force on the ejection element (3), and

   - a locking device (5) for locking the ejection element (3) by way of a locking element (6) in a locking portion (V), wherein by over-pressing the moveable furniture part (2) from the closed position (SS) in the closing direction (SR) into an over-pressing position (ÜS) the locking device (5) can be unlocked whereby the moveable furniture part (2) is moveable in the opening direction by the ejection force storage means (4) and the ejection element (3), wherein the locking device (5) has a guide path (7) for the locking element (6), wherein the locking element (6) can be held in the locking portion (V) in a latching region (8) of the guide path (7)

   characterised in that the locking device (5) has a pre-locking portion (VV) for the locking element (6), wherein by pressing the moveable furniture part (2) through upon closing thereof into a through-pressing position (DS) behind the closed position (SS) in the closing direction (SR) the locking element (6) passes from the pre-locking portion (VV) into the locking portion (V) by way of a through-pressing evasion portion (D), wherein a holding element (9) for the locking element (6) is arranged or provided in the pre-locking portion (VV), wherein
   either

   - in the pre-locking portion (VV) the guide path (7) has a straight contact surface (F) for the locking element (6), as the holding element (9), wherein the straight contact surface (F) is oriented in such a way that the force of acting from the ejection force storage means (4) onto the locking element (6) holds the locking element (6) on the straight contact surface (F) and the forces are acting substantially rectangular onto this straight contact surface (F),
   or

   - the holding element (9) is in the form of a moveable damping element (10), wherein the damping element (10) has a dampedly rotatably mounted gear (11), wherein at least one tooth (12) of the gear (11) can be contacted in the pre-locking portion (VV) by the locking element (6) and is dampedly moveable in the direction of the locking portion (V).
2. A drive device as set forth in claim 1 characterised in that the locking portion (V) is different from the pre-locking portion (VV), wherein the pre-locking portion (VV) is behind the locking portion (V) in the closing direction (SR).
3. A drive device as set forth in claim 1 or 2 characterised in that the guide path (7) successively has a preferably straight stressing portion (S), a preferably curved deflecting portion (L), the pre-locking portion (VV), the locking portion (V) in the form of a preferably trough-shaped latching region (8), an inclined diversion or unlocking portion (E) and an ejection portion (A).
4. A drive device as set forth in claim 3 characterised in that between the inclined unlocking or diversion portion (E) and the ejection portion (A) the guide path (7) has a second evasion portion (W) separate from the through-pressing evasion portion (D) for the locking element (6).
5. A drive device as set forth in one of claims 1 through 4 characterised in that the ejection force storage means (4) can be loaded by moving the moveable furniture part (2) in the opening direction (OR) and/or in the closing direction (SR).
6. A drive device as set forth in claim 5 characterised in that the ejection element (3) is lockable in the pre-locking portion (VV) by way of the locking element (6) only after complete loading of the ejection force storage means (4).
7. A drive device as set forth in one of claims 1 through 6 characterised by a retraction device (13) for retraction of the moveable furniture part (2) from an open position (OS) into the closed position (SS).
8. A drive device as set forth in claim 7 characterised in that - when the locking element (6) reaches the pre-locking portion (VV) - the moveable furniture part (2) is in an open position (OS) and the moveable furniture part (2) is moveable from that open position (OS) into the closed position (SS) by the retraction device (13).
9. A drive device as set forth in claim 7 or claim 8 characterised in that the locking element (6) is moveable from the pre-locking portion (VV) into the locking portion (V) only in the movement of the moveable furniture part (2) by the retraction device (13) into the closed position (SS).
10. A drive device as set forth in claim 9 characterised in that the locking element (6) is moveable from the pre-locking portion (VV) into the locking portion (V) in dependence on the retraction device (13).
11. An article of furniture (14) comprising a furniture carcass (15), a furniture part (2) moveable relative to the furniture carcass (15) and a drive device (1) as set forth in one of claims 1 through 10 for the moveable furniture part (2).
12. An article of furniture as set forth in claim 11 characterised in that the drive device (1) is arranged on the moveable furniture part (2) and an entrainment portion (16) which can be brought into engagement with the ejection element (3) is arranged on the furniture carcass (15).

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