EP2804505B1 - Drive device for a movable furniture part - Google Patents

Description

The invention relates to a drive device for a movable furniture part, comprising a housing and a movable relative to the housing and lockable on the housing ejection device for ejecting the movable furniture part from a closed position to an open position, wherein the ejection device by overpressing the movable furniture part in a closing direction behind the Closed position overpressure position can be unlocked. In addition, the invention relates to a piece of furniture with such a drive device and a method for moving a movable furniture part, with a lockable ejection device for ejecting the movable furniture part from a closed position to an open position, wherein the ejection device by overpressing the movable furniture part in a closing direction behind the closed position lying overpressure position is unlocked.

In the furniture fitting industry drive devices have been known for many years, which by pressing on a movable furniture part (drawer) unlock it from the furniture body and then open or eject. Exemplary here on the WO 2010/129971 A1 directed. Such drive devices have a so-called touch-latch mechanism. In these mechanisms, the movement to close the drawer from the open position and the movement to open the drawer from the closed position in the same direction (closing direction). In normal gentle closing (manually or by a retraction device), the drawer or the movable furniture part is held by the lockable ejection device in the closed position. If, however, the drawer is pushed too tightly, the ejection device can not lock at all or is immediately brought back into the overpressure position by the high closing speed and thereby unlocked, whereby no secure closing (if the closing movement is too strong) of the movable furniture part is guaranteed.

Furthermore, a drive device with a blocking element is known which has a first position in which the movable furniture part is persistent upon reaching the closed position, wherein the blocking element prevents further movement of the movable furniture part in the closing direction, and having a second position in which Way in the overpressure position for the movable furniture part is released. This can be done on the DE 10 2006 056 791 A1 be referenced, in which the pawl the Blocking element corresponds. To open the drawer, this pawl must be wanted, that is moved by a separate actuator or by applying a relatively large force in a release position.

The object of the present invention is therefore to remedy this disadvantage.

This is achieved by a drive device with the features of claim 1. Thus, by the present invention, a push-through protection is provided, which prevents an immediate reopening when closing too fast and guarantees the safe achievement of the closed position.

It can be provided that the blocking element is dependent on the force acting on the drive device closing force when reaching the closed position in the first position (at high closing force) or in the second closing force (at low closing force). Preferably, however, it is provided that the position of the blocking element (can also be referred to as temporarily removable stop) upon reaching the closed position depends on the closing speed of the movable furniture part. That is, as soon as the closing speed exceeds an adjustable or fixed threshold value (preferably 20 mm / second), the blocking element guarantees that the drawer is stopped in the closed position and does not immediately reach the overpressure position. Thus, the blocking element acts speed controlled.

It may also be provided that the blocking element is timed, e.g. is formed via a rotary damper. That is, with each closing is guaranteed that, for example, for one second to three seconds, the movable furniture part is held exactly in the closed position and only then by decreasing the damping effect of the rotary damper further movement in the closing direction (in the overpressure) is possible. The blocking element can also act pressure and / or force controlled.

It should not be excluded that the blocking element in response to a speed sensor, which measures the closing speed of the movable furniture part, in the first position (at a threshold above a threshold Speed) and in the second position (at low closing speed) is moved. According to the invention, however, a purely mechanical solution, wherein it is provided that the blocking element is slidably disposed in a formed in the housing of the drive device guideway with a closing position stop and an escape section, wherein in the first position the blocking element bears against the closing position stop and in the second position the Blocking element is movable into the escape section. The movement into the second position can preferably take place by pivoting the blocking element transversely to the closing direction. In order to trigger the movement of this blocking element, according to the invention, a force accumulator, preferably a torsion spring, is provided.
In general, not only ejection devices are used in the furniture fitting industry today, but also automatic retractors are used, which guarantee a safe and smooth closing of the movable furniture part. Preferably, such a retractor pulls the movable furniture part at a speed of about 20 mm / second.
According to a particularly preferred embodiment of the present invention can be provided that in the first position, the blocking element is clamped between a driver of the retractor and the closing position stop. That is, the blocking element is always moved in response to the retraction device, wherein in too strong manual Zusoßen the retractor itself no longer acts, but the blocking element guarantees in its first position the secure stopping of the movable furniture part in the closed position.
Furthermore, a damping device may be provided for damping the retraction movement triggered by the retraction device, wherein the damping device has a piston and a cylinder and the piston rests against the housing of the drive device and the cylinder - preferably via a coupling element arranged on the cylinder - by the driver of the retracting device relative to the housing of the drive device is movable. For this purpose, it can preferably further be provided that the blocking element is arranged on the damping device, preferably on its cylinder, and that the blocking element is movable relative to the cylinder of the damping device, preferably rotatable about the cylinder.

The closing speed-dependent control is achieved in that at a closing speed of less than 20 mm / per second before reaching the closing position stop by the energy storage in the escape section - and thus in the second position - is movable. That is, the energy storage device can deliver its force acting on the blocking element in time so far that the blocking element does not abut the closing position stop. However, the blocking element can also be moved into the escape section after (blocking) reaching the closed position and after the closing or retraction force has subsided.

For the abutment device may preferably be provided that the ejection device has a movable relative to the housing ejection slide and on the one hand on the housing and on the other hand on the ejection slide mounted ejection force storage. The locking of the ejection device can take place by means known per se. It is preferably provided that the ejection slide in a housing formed in the, preferably a heart-curved portion having detent recess, slide track is locked in the closed position via a locking element separate from the blocking element, wherein the locking pin prevents movement of the movable furniture part in the opening direction. The locking pin prevents it corresponding to the detent recess only the movement of the movable furniture part in the opening direction. The movement in the closing direction is not prevented by the locking pin and must necessarily be possible for unlocking. The movement in the overpressure position can only be blocked by the blocking element in its first position. Otherwise, reaching the overpressure position should always be possible.

Protection is also desired for a piece of furniture with a drive device according to the invention. The drive device may be associated with the furniture body and act on a arranged on the movable furniture part driver. Preferably, however, it is provided that the housing of the drive device is arranged on the movable furniture part, preferably on a drawer rail of a pull-out guide, and the driver is arranged on the furniture carcass, preferably on its carcass rail. This allows a clever and space-saving placement of the drive device.

The object according to the invention is also achieved by a method having the features of claim 16.

The closing speed-controlled movement of the blocking element can be carried out in such a way that the blocking element is in the first position when reaching the closed position only when the closing speed of the movable furniture part just before reaching the closed position of a pulling-in triggered by a retraction speed or above one by one Pulling device triggerable maximum pull-in speed is. "Just" before reaching the closed position, it refers to a range of about 3 cm before the closed position. This means that both when pulling through the retracting device as well as too fast slamming of the movable furniture part, the blocking element in its first position stops the movable furniture part in the closed position. At slower closing than by the retractor (eg, by active, manual braking of the retractor) or after release of the retractor or manually triggered closing force, the blocking member enters its second position and permits override of the movable furniture member behind the closed position.

Fig. 1

eine schematische Darstellung eines Möbels mit einer geöffneten und einer geschlossenen Schublade,

Fig. 2

eine 3D-Ansicht eines bewegbaren Möbelteils mit Antriebsvorrichtung,

Fig. 3

eine teilweise Schnittdarstellung eines bewegbaren Möbelteils,

Fig. 4

eine 3D-Darstellung einer Ladenschiene samt Antriebsvorrichtung,

Fig. 5

eine Antriebsvorrichtung mit Synchronisationselement,

Fig. 6

eine Rückansicht der Fig. 5,

Fig. 7

eine Antriebsvorrichtung ohne Abdeckkappe,

Fig. 8

eine Antriebsvorrichtung ohne Grundplatte,

Fig. 9

eine Explosionsdarstellung einer Antriebsvorrichtung,

Fig. 10

eine weitere Explosionsdarstellung der Antriebsvorrichtung samt den Elementen für die Synchronisierung,

Fig. 11

eine Ansicht einer Antriebsvorrichtung bei geöffnetem Möbelteil,

Fig. 12

eine Ansicht einer Antriebsvorrichtung beim Schließen des bewegbaren Möbelteils

Fig. 13

eine Ansicht einer Antriebsvorrichtung zu Beginn des Einziehvorganges,

Fig. 14

eine Ansicht einer Antriebsvorrichtung in Schließstellung,

Fig. 15

das Gehäuse einer Antriebsvorrichtung,

Fig. 16

die Antriebsvorrichtung ohne Abdeckkappe,

Fig. 17

eine Gehäusemittelplatte samt Dämpfvorrichtung,

Fig. 18

die andere Seite der Antriebsvorrichtung aus Fig. 17,

Fig. 19

eine Explosionsdarstellung eines Durchdrückschutzmoduls,

Fig. 20

das zusammengebaute Durchdrückschutzmodul,

Fig. 21 und 21a

einen Schnitt durch das in die Antriebsvorrichtung eingebaute Durchdrückschutzmodul,

Fig. 22

ein Detail zur Kraftweiterleitung von der Einziehvorrichtung auf das Blockierelement,

Fig. 23

das Blockierelement in seiner Führungsbahn vor dem Einziehen,

Fig. 24 und 24a

das Blockierelement in seiner ersten Stellung,

Fig. 25 und 25a

ein weiteres Bild der Blockiervorrichtung in seiner ersten Stellung,

Fig. 26 und 26a

das Blockierelement in seiner zweiten Stellung,

Fig. 27 und 27a

eine weitere Ansicht des Blockierelements in seiner zweiten Stellung,

Fig. 28 und 28a

das Blockierelement im Ausweichabschnitt und

Fig. 29 bis 31

schematisch den Ablauf des Schließens mit Blockierung und ohne Blockierung.

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

a schematic representation of a piece of furniture with an open and a closed drawer,

Fig. 2

a 3D view of a movable furniture part with drive device,

Fig. 3

a partial sectional view of a movable furniture part,

Fig. 4

a 3D representation of a drawer rail including drive device,

Fig. 5

a drive device with synchronization element,

Fig. 6

a rear view of the Fig. 5 .

Fig. 7

a drive device without cap,

Fig. 8

a drive device without base plate,

Fig. 9

an exploded view of a drive device,

Fig. 10

a further exploded view of the drive device including the elements for synchronization,

Fig. 11

a view of a drive device with the furniture part open,

Fig. 12

a view of a drive device when closing the movable furniture part

Fig. 13

a view of a drive device at the beginning of the Einziehvorganges,

Fig. 14

a view of a drive device in the closed position,

Fig. 15

the housing of a drive device,

Fig. 16

the drive device without cap,

Fig. 17

a housing middle plate including damping device,

Fig. 18

the other side of the drive device Fig. 17 .

Fig. 19

an exploded view of a push-through protection module,

Fig. 20

the assembled push-through protection module,

Figs. 21 and 21a

a section through the built-in the drive device blast protection module,

Fig. 22

a detail for force transmission from the retractor to the blocking element,

Fig. 23

the blocking element in its guideway before retraction,

Figs. 24 and 24a

the blocking element in its first position,

Figs. 25 and 25a

another image of the blocking device in its first position,

FIGS. 26 and 26a

the blocking element in its second position,

Figs. 27 and 27a

another view of the blocking element in its second position,

Figs. 28 and 28a

the blocking element in the escape section and

Fig. 29 to 31

schematically the process of closing with blocking and without blocking.

Fig. 1 schematically shows a piece of furniture 17 with a furniture body 13 and two movable furniture parts 2. The upper shown movable furniture part 2 with front panel 20 and drawer 21 is in an open position OS, while the lower movable furniture part 2 is in a closed position SS. The movable furniture parts 2 are each slidably mounted on the furniture body 13 via a drawer rail 18 and a cabinet rail 22, which together form a pull-out guide 19. In the area of the drawer rail 18, a drive device 1 is in each case arranged via a housing 3 (not shown). On the one hand, this drive device 1 has an ejection device 5 consisting of ejection slide 6 and ejection force accumulator 7 and, on the other hand, a retraction device 8 comprising a retraction slide 9 and a retraction force accumulator 10. In addition, the drive device 1 has a driver 4 arranged on the carcass rail 22 or on the furniture body 13. When the movable furniture part 2 is moved from the open position OS in the closing direction SR, first the driver 4 comes in contact with the Einziehschlitten 9. Since this Einziehschlitten 9 is locked on the ejection slide 6, when closing the movable furniture part 2 of the ejection force memory 7 (according to this Representation of a compression spring) stretched as the ejection slide 6 moves relative to the drawer rail 18. Upon reaching the Einziehabschnittes the ejection force memory 7 is fully tensioned and the Einziehschlitten 9 is unlocked, whereby the Einziehkraftspeicher 10 (in this illustration, a tension spring) relaxes or pulls together and thereby moves the movable furniture part 2 via the driver 4 in the closed position SS ( see lower drawer).

In Fig. 2 is a movable furniture part 2 with front panel 20 and drawer 21 and shown with a mounted on the drawer rail 18 drive device 1 together with synchronization element 23.

In Fig. 3 is the drawer 21 nor the side wall (frame) visible, whereby the view of the container rail 24 is free. About this container rail 24 of the bottom of the drawer 21, not shown here is fixed to the drawer rail 18. Between the drawer rail 18 and the carcass rail 22 may still be provided a middle rail.

Fig. 4 shows the drawer rail 18 with attached drive device 1 together with a part of a synchronization element 23rd

In Fig. 5 it can be seen that the synchronization element 23 is held by a mounted on the housing 3 of the drive device 1 holder 25. This bracket 25 is at a depth adjustment for adjusting the closing depth of the movable furniture part 2 in the furniture body 13 relative to the housing 3 movable.

In Fig. 6 is a view of the drive device 1 shown from the rear, it being understood that the housing 3 on the one hand from the base plate 27 and on the other hand from the cover plate 28 consists. Furthermore, the retaining bracket 26 is shown for the driver 4 in this figure. This headband 26 connects the driver 4 with the carcass rail 22nd

In Fig. 7 the drive device 1 is shown without cap 28, whereby the view into the interior of the drive device 1 is free. Therein, a further part of the housing 3 forming housing center plate 31 is shown, which is adjustable relative to the two outer housing parts 27 and 28 by the Tiefenverstellrad 34. At this housing middle plate 31 and the damping device 16 is arranged, which includes a damping cylinder 29 and a damping piston 28, wherein the damping piston 30 abuts the Einziehschlitten 9, not shown here at least during the retraction movement. Furthermore, in the area of the housing middle plate 31, the overload spring 35 for the overload safety device is shown, which guarantees that the movable furniture part 2 can be moved non-destructively out of the closed position SS by pulling. The ejection force accumulator 7 is held on the housing base 3 via the spring base 32 and on the ejector slide 6 via the spring base 33. In Fig. 7 - as well as in the Fig. 9 and 10 - The push-through protection module 77 is not shown.

In Fig. 8 (Without base plate 27, but with cap 28), however, the Einziehkraftspeicher 10 is shown, which is held on the spring base 36 on the one hand on the ejection slide 6 and the spring base 37 on the other hand on Einziehschlitten 9.

In Fig. 9 Once again, the essential components of the housing 3, namely the base plate 27, the cap 28 and the housing center plate 31, which is displaceable therein only for the depth adjustment, are shown. On the housing center plate 31 also the knobs 41 can be seen, via the rotation of the Tiefenverstellrads 34, the sliding movement is made possible. On the housing middle plate 31 and the overload spring 35 and the overload bar 42 and the damping device 16 (with the displaceable by the driver 75 coupling element 76) are arranged. Between the Housing middle plate 31 and the base plate 27 of the ejection slide 6 is slidably mounted, wherein the locking lever 44 is rotatably mounted on the ejection slide 6 and engages over its locking pin 43 in the formed in the middle plate 31 slide track 12 with heartkurvenförmigem section. Along the Ausziehschlittens 6 turn the Einziehschlitten 9 is movably mounted, said Einziehschlitten 9, the carriage base 39, the locking element 15, the catch lever 38 and the abutment part 40 includes. This abutment member 40 is formed of a relatively soft plastic, whereby the fitting in this area driver 4, especially at fast closing undergoes a certain damping and the Einziehschlitten 9 is less worn and claimed.

In Fig. 10 are opposite the Fig. 9 in addition, the components for synchronizing arranged on both sides of the movable furniture part 2 arranged drive devices 1. In this case, the Ausziehschlitten 6, the synchronization teeth 46 are shown, with which the synchronization gear 45 corresponds. In this synchronization gear 45, the synchronization element 23 engages and guarantees in both sides arranged drive device 1, a synchronous release of the unlocking and a synchronous clamping of the ejection force memory. 7

In Fig. 11 is in a view without base plate 27, the cap 28 and the housing middle plate 31 with slide track 12 and locking recess 11 can be seen. In addition, the ejection slide 6, the ejection force memory 7, the Einziehkraftspeicher 10 and the Einziehschlitten 9 together with the carriage base 39 and catch lever 38 and the driver 4 is shown. In this Fig. 11 is the movable furniture part 2 in the open position OS. The Einziehschlitten 9 is in the locked position VE. This locking position VE is given by the fact that the locking element 15 is locked via a locking bevel formed in the Ausziehschlitten 6 and can not pivot about the pivot axis. This is made possible by the retraction force accumulator 10 pulling lightly on the carriage base 39 and the locking element 15 thereby can not move upwards. Alternatively, it could also be provided that the locking element 15 can not be unlocked by the design of a control track formed in the housing 3.

In Fig. 12 begins the closing movement of the movable furniture part 2 in the closing direction SR, wherein the driver 4 on Einziehschlitten 9, preferably at whose abutment part 40, rests. By this movement in the closing direction SR, the ejection slide 6 moves relative to the housing 3 to the left, whereby the ejection force accumulator 7 designed as a tension spring is tensioned. At the same time the catch lever 38 is deflected by the deflection bevel formed on the housing 3 and "catches" the driver 4 in the Einziehschlitten 9 a.

In Fig. 13 the ejection force accumulator 7 is fully tensioned. In addition, the control pin 43 has moved beyond the detent recess 11 of the slide track 12 by about 3.5 mm addition. In this position, the locking element 15 is simultaneously on the in Fig. 14 apparent Einziehabschnitt E of the control path 14 in the housing 3 unlocked. As a result, the Einziehschlitten 9 is no longer in the locked position VE.

By this unlocking the Einziehschlitten 9 is no longer held on Ausziehschlitten 6 and the retractor 8 moves the movable furniture part 2 from the open position OS according to Fig. 13 in the closed position SS according to Fig. 14 , This retraction is ensured by the catch lever 38 and its power transmission to the driver 4. The fact that no more pressure in the closing direction SR is exerted on the movable furniture part 2, also moves the locking pin 43 in the detent recess 11, whereby the locking position VA of the ejection slide 6 and thus of the movable furniture part 2 is reached.

Fig. 15 shows the drive device 1 with the base plate 27 and the cap 28 of the housing 3. In Fig. 16 the cap 28 is removed and the view of the damping device 16 and the housing center plate 31 is free.

In Fig. 17 it can be seen that on the damping cylinder 29 in addition, the push-through contactor module 77 is arranged, which surrounds the damping piston 30. In Fig. 18 is one to Fig. 17 matching rear view of the housing middle plate 31 shown. In this case, both the coupling element 76 arranged on the damping cylinder 29 or firmly connected thereto and the blocking element 70 engage in the guide track 71 formed in the housing center plate 31. This guide track 71 additionally has the closing position stop 72 and the escape section 73.

In Fig. 19 the essential components of the push-through protection module 77 are shown in an exploded view. In this case, the blocking element 70 rests on the base member 80 and is force-displaced by the force accumulator 74 (torsion spring) in the clockwise direction. The blocking element 70 is held on the front cap 79 on the base member 80 and can only rotate about this. Between the blocking element 70 and the front cap 79, a stopper damping element 78 is arranged. This is preferably formed as an annular felt. In Fig. 20 the push-through protection module 77 is shown in the assembled state.

Fig. 21 and 21 a show a section through the built-in in the drive device 1 push-through protection module 77. In this case, the extension of the blocking element 70 engages through the trained in the middle plate 31 guide rail 71 passes. In addition, the headband 26 for the driver 4 and the ejection slide 6 can be seen. Also in the ejection slide 6 on the Einziehkraftspeicher 10 movable carriage base 39 of the retracting device 8 is shown. From this retracting device 8 closing force is exerted on the blocking element 70. The ejection force accumulator 7 exerts force on the ejection slide 6 in the opening direction OR.

Figs. 22 and 22a shows in detail how force is exerted by the retracting device 8 in the closing direction SR on the damping device 16 and the push-through protection module 77. In particular, for this, the locking member 15 of the retractor 8 and the Einziehschlittens 9 a driver 75 which abuts when pulling on the coupling element 76 and this entrains together with the damping cylinder 29 in the closing direction SR against the force of the damping device 16 and retracts. Also arranged on the damping cylinder 29 push-through protection 77 together with the blocking element 70 is thereby taken and moved relative to the applied to the middle plate 31 damping piston 30.

In Figs. 23 and 23a If this driver 75 is no longer shown, however, it can be seen where the coupling element 76 and the blocking element 70 are located in the guideway 71 before the pulling movement begins.

Too fast manual closing of the movable furniture part 2 is about the driver 75 of the damping cylinder 29 moves so fast in the closing direction SR, whereby the blocking element 70 can not move into the escape section 73 and Thus, between the driver 75 and the coupling element 76 and the closing position stopper 72 is clamped (see Fig. 24, 24a . 25 and 25a ). In this first position BL of the blocking element 70, the movable furniture part 2 can not be inserted so far that the locking pin 43 unlocks from the detent recess 11 of the heart cam.

In contrast, in Fig. 26, 26a . 27 and 27a shown that with slower or triggered by the retraction 8 closing movement, the blocking element 70 can move or pivot in the evasion portion 73 of the guideway due to the application of force by the force accumulator 74, whereby the second position FR of the blocking element 70th given is. In the mentioned figures, the movable furniture part 2 is in the closed position SS.

If now as in Figs. 28 and 28a From this closed position SS in the closing direction SR is pressed onto the movable furniture part 2, the coupling element 76 and with him the entire ejection slide 6 along the trip path AW can move into the overpressure position ÜS. Since the blocking element 70 is disposed in or in the evading portion 73, it can no longer prevent the triggering movement, but releases the path into the overpressure position ÜS. As a result, the ejection force accumulator 7 can exert its effect and moves via the ejection slide 6, the movable furniture part 2 in the opening direction OR. Subsequently, the Einziehschlitten 9 is stretched again. In this case, the driver 75 moves away again from the coupling element 76 of the damping cylinder 29, whereby the damping piston 30 can move out of the damping cylinder 29 again. In this movement, the coupling element 76 and the blocking element 70 is moved in the opening direction OR along the guide track 71, wherein by moving the blocking element 70 along the Ausweichschräge 81, the blocking element 70 is rotated counterclockwise and thereby the energy accumulator 74 is tensioned. Thereafter, the blocking element 70 returns to the starting position according to Fig. 23a ,

Finally, in the FIGS. 29 and 31 shown again schematically the push-through protection according to the invention, wherein according to Fig. 29 the movable furniture part 2 bears for example directly on the blocking element 70. This blocking element 70 is through the force accumulator 74 is subjected to force transversely to the closing direction SR and is guided in the guide track 71.

If according to Fig. 30 the movable furniture part 2 is closed too fast, the force of the energy storage 74 can not develop fast enough and the blocking element 70 is clamped between the movable furniture part 2 and the closed position stopper 72. As a result, the first position BL is given and the movable furniture part 2 is securely stopped in the closed position SS. As soon as the force acting on the movable furniture part 2 (momentum from closing or forced locking) subsides, the friction between blocking element 70 and closing stop 72 or furniture part 2 (or coupling element 76) also decreases and the energy store 74 can move the blocking element 70 into the escape section 73 move. Thus, it is also guaranteed that the blocking element 70 acts force-controlled. This means that after too fast closing of the movable furniture part 2, an at least short-term release of the movable furniture part 2 by the operator is necessary. As a result, the friction decreases or the stopper damping element 78 can expand again so that the blocking element 70 moves into the escape section 73.

As a result, the movable furniture part 2 can be moved from the closed position SS along the, preferably 3.5 mm long, triggering path AW into the overpressure position ÜS by a further pressing after release in between times, and the lockable ejection device 5 is unlocked, as a result of which the movable furniture part 2 is ejected in the opening direction OR.

Claims (19)

1. A drive device (1) for a moveable furniture part (2) comprising a lockable ejection device (5) for ejecting the moveable furniture part (2) out of a closed position (SS) into an open position (OS), wherein the ejection device (5) is unlockable by over-pressing the moveable furniture part (2) into an over-pressed position (ÜS) which in the closing direction (SR) is behind the closed position (SS), and a blocking element (70)

   - which has a first position (BL) in which the moveable furniture part (2) can be stopped when reaching the closed position (SS), wherein the blocking element (70) prevents a further movement of the moveable furniture part (2) in the closing direction (SR), and

   - which has a second position (FR) in which the path into the over-pressed position (ÜS) for the moveable furniture part (2) is enabled,

   characterised in that the blocking element (70) is arranged displaceably in a guide track (17) provided in a housing (3) of the drive device (1) and having a closed position abutment (72) and an evasion portion (73), wherein in the first position (BL) the blocking element (70) bears against the closed position abutment (72) and in the second position (FR) the blocking element (70) is moveable into the evasion portion (73), wherein the blocking element (70) comprises a force storage means (74) by which the blocking element (70) is moveable from the first position (BL) into the second position (FR).
2. A drive device as set forth in claim 1 characterised in that the position (BL, FR) of the blocking element (70) when reaching the closed position (SS) is dependent on the closing speed of the moveable furniture part (2).
3. A drive device as set forth in claim 1 or 2 characterised in that the blocking element (70) is moveable from the first position (BL) into the second position (FR) transversely relative to the closing direction (SR).
4. A drive device as set forth in one of claims 1 through 4 characterised in that the force storage means (74) is a torsion spring.
5. A drive device as set forth in one of claims 1 through 4 characterised by a retraction device (8) by which the moveable furniture part (2) is moveable from an open position (OS) into the closed position (SS).
6. A drive device as set forth in claim 5 characterised in that the moveable furniture part (2) is retractable by the retraction device (8) at a maximum closing speed 30 mm/second, preferably at a closing speed of between 25 mm/second and 15 mm/second.
7. A drive device as set forth in claim 5 or claim 6 characterised in that in the first position (BL) the blocking element (70) is clamped between an entrainment means (75) of the retraction device (8) and the closed position abutment (72).
8. A drive device as set forth in one of claims 5 through 7 characterised by a damping device (16) for damping the retraction movement triggered by the retraction device (8).
9. A drive device as set forth in claim 8 characterised in that the damping device (16) has a damping piston (30) and a damping cylinder (29), wherein a part of the damping device (16), preferably the damping piston (30), bears against the housing (3) of the drive device (1) and the damping cylinder (29) is moveable relative to the housing (3) of the drive device (1) by the entrainment means (75) of the retraction device (8) - preferably by way of a coupling element (76) on the damping cylinder (29).
10. A drive device as set forth in claim 8 or claim 9 characterised in that the blocking element (70) is arranged on the damping device (16), preferably on the damping cylinder (29) thereof.
11. A drive device as set forth in one of claims 8 through 10 characterised in that the blocking element (70) is moveable relative to the damping cylinder (29) of the damping device (16), preferably being rotatable about the damping cylinder (29).
12. A drive device as set forth in one of claims 4 through 11 characterised in that at a closing speed of the moveable furniture part (2) of below 20 mm/second the blocking element (70) is moveable into the evasion portion (73) - and thus into the second position (FR) - by the force storage means (74) before reaching the closed position abutment (72).
13. A drive device as set forth in one of claims 1 through 12 characterised in that the ejection device (5) has an ejection slider (6) displaceable relative to the housing (3) and an ejection force storage means (7) fixed on the one hand to the housing (3) and on the other hand to the ejection slider (6).
14. A drive device as set forth in claim 13 characterised in that the ejection slider (6) is lockable in the closed position (SS) in a sliding guide track (12) which is provided in the housing (3) and which preferably has a cardioid-shaped portion with a latching recess (11), by way of a locking pin (43) separate from the blocking element (70), wherein the locking pin (43) prevents a movement of the moveable furniture part (2) in the opening direction (OR).
15. An article of furniture (17) comprising a furniture carcass (13), a moveable furniture part (2) and a drive device (1) as set forth in one of claims 1 through 14 for the moveable furniture part (2).
16. A method of moving a moveable furniture part (2) which comprises a drive device (1) comprising a lockable ejection device (5) for ejecting the moveable furniture part (2) out of a closed position (SS) into an open position (OS), wherein the ejection device (5) is unlocked by over-pressing the moveable furniture part (2) into an over-pressed position (ÜS) which is behind the closed position (SS) in the closing direction (SR), wherein the moveable furniture part (2) is stopped when reaching the closed position (SS) by a blocking element (70) of the drive device (1) which blocking element (70) is in a first position (BL), wherein a further movement in the closing direction (SR) is prevented by the blocking element (70) and when the blocking element (70) is in a second position (FR) the path into the over-pressed position (ÜS) for the moveable furniture part (2) is enabled, characterised in that the blocking element (70) is arranged displaceably in a guide track (17) provided in a housing (3) of the drive device (1) and having a closed position abutment (72) and an evasion portion (73), wherein in the first position (BL) the blocking element (70) bears against the closed position abutment (72) and in the second position (FR) the blocking element (70) is moveable into the evasion portion (73), wherein the blocking element (70) comprises a force storage means (74) by which the blocking element (70) is moveable from the first position (BL) into the second position (FR).
17. A method as set forth in claim 16 characterised in that when reaching the closed position (SS) the blocking element (70) is in the first position (BL) only when the closing speed of the moveable furniture part (2) just before reaching the closed position (SS) corresponds to the retraction speed triggered by a retraction device (8) or is above a maximum retraction speed triggerable by a retraction device (8).
18. A method as set forth in claim 17 characterised in that the maximum retraction speed triggerable by the retraction device (8) is 30 mm/second.
19. A method as set forth in claim 17 or claim 18 characterised in that the moveable furniture part (2) is retracted by the retraction device (8) at a retraction speed of between 25 mm/second and 15 mm/second, preferably at a retraction speed of 20 mm/second.

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