EP1978842B1 - Drive mechanism for a furniture part mounted in a movable manner on a piece of furniture - Google Patents

Abstract

Drive mechanism (7) for a furniture part (12) mounted in a movable manner on a piece of furniture (13), having a drive device (7) which is mounted in a displaceable manner in relation to a base (34) and is intended for pushing the movable furniture part (12) out of a closed end position into an open position, wherein the drive device (18) comprises a pushing-out element (19), which can be activated by an energy store (24) and is guided in a preferably heart-shaped guideway (25, 25') formed on the base (34), and a securing element (10) for arresting the movable furniture part (12), in particular a driver element (4) which is, or can be, assigned to the movable furniture part (12), wherein the securing element (10) is connected in a movable manner to the pushing-out element (19) and is guided in a guideway (27) which is formed on the base (34) and is preferably separate from the guideway (25) of the pushing-out element (19).

Description

The invention relates to a drive mechanism for a movably mounted on a furniture furniture part with a relative to a base slidably mounted drive device for ejecting the movable furniture part from a closed end position to an open position, wherein the drive device can be acted upon by a force storage ejection element, in one at the base trained, preferably heart-shaped guideway is guided, and a locking element for locking the movable furniture part, in particular a the movable furniture part associated with or assignable driver element comprises.

There are already known drive mechanisms for opening a drawer or a door from a closed end position to an open position as z.ß. out DE 295 07 917 U is known, wherein the invention provides an improvement of a drive mechanism in which the opening of the door or the drawer takes place by means of a discharging force accumulator, which is preferably loaded when closing the movable furniture part, and wherein the movable furniture part in its closed end position by means of a locking element is concerned, in particular a drive mechanism with a touch-latch mechanism for opening the movable furniture part and a locking element, which prevents the movable furniture part can slide automatically with the touch-latch mechanism locked in an open position.

In known drive mechanisms with a touch-latch mechanism, in which the locking element is an integral part of the touch-latch mechanism, the locking element assumes, for example, a double function, ie, for example, latch-shaped locking locked for a movable furniture part in its closed end position and is on the other hand, in its function as an ejection element of the touch-latch mechanism, it is simultaneously guided in a heart-shaped gate in order to be able to lock the tensioned energy store of the touch-latch mechanism. In a further known drive mechanism, the ejection element is guided at one end in a heart-shaped gate and hook-shaped on its opposite end to engage behind a movable element formed on the movable element can. In such drive mechanisms, it is necessary that the plane in which the ejection element is moved, with the plane of movement of the driver includes a non-zero angle to ensure that the hook-shaped End portion of the ejection element releases the driver element of the movable furniture part during the opening process.

The present invention has set itself the task of providing an improved drive mechanism of the type in question, which is characterized in operation by a high reliability and also space-saving in a simple manner to a piece of furniture can be arranged.

According to the invention this object is achieved by the locking element is movably connected to the ejection element and guided in a formed on the base, preferably separated from the guide track of the ejection element, guide track. In other words, the locking element and the ejection element are formed as two separate components, which are movably connected to each other and guided in a, preferably one, formed on the base guideway, wherein the guide path for the ejection element is preferably heart-shaped, whereby the ejection element acting energy storage is lockable and the drive device can follow the principle of a touch-latch mechanism.

The fact that the locking element is formed as a separate, guided in a separate guideway component, on the one hand ensures that the plane in which the ejection element moves, and the plane in which the arranged on the movable furniture part driver element moves substantially can run parallel, whereby the height of the drive mechanism can be kept low. Furthermore, it is achieved by the construction according to the invention that the ejection element can be movably mounted parallel to the opening direction of the movable furniture part and in the same plane as the driver element arranged on the movable furniture part, so that a jamming or jamming of the ejection element in its guide track - as in the prior art could happen - almost completely excluded.

According to a further embodiment of the invention it is provided that the locking element with the ejection element is linearly movably connected or connected, while an alternative, preferred embodiment of the invention provides that the locking element is rotatably connected or connectable to the ejection element, whereby it is ensured that the movement of the locking element relative to the ejection element is smooth.

According to a further embodiment of the invention, the drive mechanism has a housing in which the ejection element movably connected to the locking element is mounted linearly movable. It has proven to be structurally simple if the housing has a bottom surface and a top surface and connecting these side surfaces, wherein the guide track (s) for the ejection element and / or the locking element in the top surface and / or bottom surface of the housing is formed (are ) and the top surface or bottom surface of the housing forms the base against which the drive device is slidably mounted. In other words, the preferably heart-shaped guide track for the ejection element and the guide track for the locking element, which according to a preferred embodiment of the invention is arcuate, formed on the top surface and / or the bottom surface of the housing of the drive device inside.

A particularly simple mounting possibility of the drive mechanism according to the invention on the furniture arises when - as another embodiment of the invention provides - the housing is substantially cuboid, wherein the bottom surface is larger than the top surface, or vice versa, and for fastening the housing to the furniture, preferably on a drawer slide system is formed. Although it would be possible in principle to have the driver element of the movable furniture part to a front side of the ejection element, a preferred embodiment of the invention provides that the ejection element has two end faces and connecting side surfaces and on a side surface of the ejection element a stop element for a movable Furniture part assigned or assignable driver element is formed, wherein it has proved to be favorable when the abutment surface of the stop element and the end faces of the ejection element, which are preferably parallel, lie in different planes, whereby with respect to the locking of the driver element by means of the locking element a constructive simple solution results.

This is achieved in particular if, according to a further embodiment of the invention, the locking element is arranged on the ejection element such that the Carrier element is locked at least when the end position of the movable furniture part between the stop element and the locking element.

If in this case the locking element is formed latch-shaped and has a contact portion which is designed to rest against a corresponding portion of the stop element, and a locking portion for engaging behind a voltage applied to the stop surface of the stop element Mitnehmerelementess, a particularly compact unit is realized, the amount also kept small can be when the housing of the drive mechanism in a side surface has an elongated outlet opening for the stop element and the locking element, so that the stop element and at least partially projecting the locking element laterally from the housing.

Advantageously, it is provided that the locking element at one end pivotally connected to the ejection element and arranged over a preferably arranged in the region of the contact portion guide pin in a formed at the base of the drive mechanism between a guide element in the opening direction of the movable furniture part releasing the first end position and the Carrier element in the opening direction arresting second end position is pivotally guided and the guideway for the locking element on the top surface of the housing of the drive device is formed lying inside, whereby the drive device works smoothly overall.

Fig.1

perspektivisch einen erfindungsgemäßen, an einem Führungssystem angeordneten Antriebsmechanismus,

Fig.2a und 2b

das Ausführungsbeispiel aus Fig. 1 in unterschiedlichen Stellungen des bewegbaren Möbelteiles,

Fig. 3a

in einer Explosionsdarstellung ein erstes Ausführungsbeispiel eines erfindungsgemäßen Antriebsmechanismus,

Fig. 3b

perspektivisch den Gehäuseoberteil aus Fig 3a,

Fig. 4a

in einer Perspektive den Antriebsmechanismus aus Fig 3a

Fig. 4b

eine Vorderansicht des Ausführungsbeispieles gemäß Fig. 4a,

Fig. 5

den Gehäuseoberteil aus Fig. 3b in einer Draufsicht,

Fig. 6a und 6b

die Antriebsvorrichtung in zwei unterschiedlichen Endstellungen,

Fig. 7a und 7b

in Draufsicht unterschiedliche Stellungen des Feststellelementes relativ zum Anschlagelement

Fig. 8a

eine Explosionsdarstellung eines weiteren Ausführungsbeispieles eines erfindungsgemäßen Antriebsmechanismus,

Fig. 8b und 8c

perspektivische Ansichten des Ausführungsbeispieles gemäß Fig. 8a,

Fig. 8d

eine Unteransicht des Feststellelementes gemäß Fig. 8a,

Fig. 9a und 9b

eine Schrägansicht und eine Draufsicht auf den Gehäuseoberteil des Ausführungsbeispieles gemäß Fig. 8a, und

Fig. 10a u. 10b

in Draufsicht unterschiedliche Stellungen des Feststellelementes relativ zum Anschlagelement.

Further advantages and details of the drive mechanism according to the invention are explained in more detail in the following description of the figures with reference to the exemplary embodiments illustrated in the drawing. It shows

Fig.1

in perspective a drive mechanism according to the invention arranged on a guide system,

2a and 2b

the embodiment Fig. 1 in different positions of the movable furniture part,

Fig. 3a

in an exploded view, a first embodiment of a drive mechanism according to the invention,

Fig. 3b

in perspective, the upper housing part Fig. 3a .

Fig. 4a

in one perspective the drive mechanism Fig. 3a

Fig. 4b

a front view of the embodiment according to Fig. 4a .

Fig. 5

the upper housing part Fig. 3b in a plan view,

Fig. 6a and 6b

the drive device in two different end positions,

Fig. 7a and 7b

in plan view, different positions of the locking element relative to the stop element

Fig. 8a

an exploded view of another embodiment of a drive mechanism according to the invention,

Fig. 8b and 8c

perspective views of the embodiment according to Fig. 8a .

Fig. 8d

a bottom view of the locking element according to Fig. 8a .

Fig. 9a and 9b

an oblique view and a plan view of the upper housing part of the embodiment according to Fig. 8a , and

Fig. 10a u. 10b

in plan view, different positions of the locking element relative to the stop element.

In Fig. 1 a guide system 1 for a not shown movable furniture part is shown, which is a cabinet rail 2, with the guide system 1 is fixed to a wall of a furniture, also not shown, and a drawer rail 3 with a fastening device 6 for attaching the movable furniture part, not shown on the Loading rail 3 includes. Furthermore, a driver element 4 is arranged on the drawer rail 3 such that the driver element 4 participates in the movement of the movable furniture part in the closing and open direction. In the illustrated embodiment, the position of the driver element 4 via an adjusting mechanism 5 is variable, in the opening or closing direction of the movable furniture part, so that this depth adjustment of the driver element 4, the front gap between the movable furniture part and the body of the furniture is adjustable.

On the carcass rail 2 of the drive mechanism 7 is further attached. In this case, the connection of the drive mechanism 7 with the carcass rail 2 by means of the bottom surface 11 of the housing 8 of the drive mechanism 7. The housing 8 is formed substantially cuboid, wherein from the driver element 4 facing side surface of the housing 8 laterally the stop element 9 and the locking element 10th protrude.

In this case, the drive mechanism 7 is arranged and designed such that, as in Fig. 2a shown, the driver element 4 in the closed end position of the movable Furniture part 12 abuts on the stop element 9 and is locked between the stop element 9 and located in one of its two settings locking element 10.

To open the movable furniture part 12, as is customary in so-called "touch-latch mechanisms", the movable furniture part 12 is first pressed against its opening direction OR further into the furniture from its closed end position, whereby the drive device is unlocked and the movable furniture part in the opening direction OR brings in an open position.

In Fig. 2b the movable furniture part 12 has already reached an open position. The drawer rail 3 and with it the driver element 4 have with respect to in Fig. 2a shown position moved to the right. During this opening movement of the movable furniture part 12, the locking element 10 has been pivoted into the housing 8 of the drive mechanism 7, so that the driver element 4 is freely movable in the opening direction OR of the movable furniture part 12.

Fig. 3a shows an exploded view of a drive mechanism 7 according to the invention with a drive device 18, wherein the locking element 10 is rotatably connected to the ejection element 19. The drive mechanism 7 comprises an oblong, essentially U-shaped ejection element 19 with two end faces 21, 21 'and connecting side faces 35 viewed from the bottom up. A stop element 9 with a stop face 22 for the entrainment element 4 is stationary on a side face 35 arranged. The stop surface 22 extends substantially in a plane parallel to the end face 21 of the ejection element 19, but is offset in depth relative to the end face 21. On the same side surface 35 is further rotatable about the rotational axis a rotatably mounted a latch-shaped locking element 10. Both the stop element 9 and the locking element 10 have a guide element 42 and a guide pin 33 over which the stop element 9 and the locking element 10 are guided in formed on the inside of the top surface 14 of the housing 8 guideways 26, 27.

In addition to the stop element 9 and the locking element 10, a guide lever 20 rotatably mounted about the rotation axis b is furthermore connected to the ejection element 19. In its opposite end of the pivot point of the guide lever 20 has a guide pin 28, via which the guide lever 20 in a formed on the inside of the top surface 14 of the housing 8, preferably heart-shaped guideway 25, 25 'is displaceably guided. The displaceable mounting of the guide lever 20 in the heart-shaped guide track 25 allows, as is known per se, the locking of the acted upon by an energy storage ejection element 19th

The preferably designed as a component drive device 18 is arranged in a cuboid housing 8 with a top surface 14, end faces 16 and connecting them side surfaces 15, wherein was dispensed with the representation of the bottom surface of the housing.

Fig. 3b now shows the upper part of the housing 8, in which the drive device 18 can be arranged longitudinally displaceable. On the inside of the top surface 14, the guide track 27 for the guide pin 33 of the locking element 10 and the guide track 26 for the guide member 42 of the stop element 9 can be seen. In the region of these two guide tracks 26, 27, an outlet opening 23 for the stop element 9 and the locking element 10 is formed in the side face 15 of the housing 8.

In the Fig. 4a and 4b this first embodiment of a drive mechanism according to the invention is shown in an oblique view from above and in a front view. It can be seen that the trough-shaped part of the housing 8 is closed on its open side by means of the bottom surface 11. The arranged in the end faces 16 of the housing 8 of the drive mechanism 7 openings 17 serve to receive and at the same time as a stop for the formed in the form of tension springs force accumulator 24, which is operatively connected to the ejection element 19 of the drive device 18. Of course, the energy accumulator 24 could also be formed by a piston-cylinder unit or by a motor.

Fig. 5 shows the upper part of the housing 8 in a bottom view, from which it can be seen that the top surface 14 of the housing 8, the base 34 against which the drive device 18 is slidably mounted forms. On the inside of the top surface 14, a heart-shaped guide track 25 is arranged for the arranged on the guide lever 20 guide pin 28. The heart-shaped guide track 25 further has an extended portion 25 ', which is to facilitate the insertion of the drive device 18 in the upper part of the housing 8 and the threading of the guide pin 28 in the guideway 25, 25'.

At the in Fig. 6a shown position of the drive device 18, the energy storage 24 is relaxed and the locking element 10 is in a laterally pivoted away from the stop element 9 position. The hook-shaped locking element 10 is rotatably mounted in an end portion about the axis of rotation a and has a contact portion 29, which is designed for positive engagement with a corresponding contact portion 31 of the stop element 9. The locking portion 30 is adjoined by a locking portion 30, with which the Festestellelement 10 engages behind the driver element 4 in its one end position, whereby the driver element 4 is caught between the stop surface 22 of the stop element 9 and the locking portion 30 of the locking element 10 ( Fig. 6b ). The locking element 10 is slidably mounted via a guide pin 33 in the arcuate guide track 27, wherein due to the curved course of the guide track 27, the locking element 10 is pivoted in a longitudinal displacement of the drive device 18 in the housing 8.

The locking and unlocking of the force accumulator 24 via the arranged on the guide lever 20 guide pin 28, which, as already mentioned above, in the section heart-shaped guide track 25, 25 ', which is formed on the base 34, out.

The drive device 18 itself is on the one hand via guide nubs 32 which slide along the side surfaces 15 of the housing 8 and on the other via the arranged on the top of the stop element 9 and in the base 34 formed on the guide rail 26 engaging guide member 42 longitudinally displaceable in Housing 8 stored.

From the in Fig. 7a shown top view of the drive mechanism 7 it can be seen that both the stop element 9 and the locking element 10 protrude laterally through a formed in the side wall 15 of the housing 8 passage opening 23 and lock the driver element 4 at the closed end position of the movable furniture part between them. If the locking of the force accumulator is released and the movable furniture part moves in the opening direction OR, as shown in FIG Fig. 7b is shown, the locking member 10 pivots due to the guided in the curved guide rail 27 guide pin 33 to the right, and are in this way the driver 4 in the opening direction OR of the movable furniture part free, so that the movable furniture part by means of the discharge element 19 arranged stop element 9, the along with the ejection element 19 is also moved in the opening direction OR of the movable furniture part due to the discharging force accumulator, is ejected.

In Fig. 8a an exploded view of a second embodiment of a drive mechanism 7 according to the invention is shown. Apart from the fact that in this embodiment, the guide rail 27 is formed for the guide pin 33 of the locking element now as a passage opening in the top surface 14 of the housing 8 of the drive mechanism 7, the second embodiment differs from the first embodiment primarily in that the locking member 10 with the ejection element 19 is connected linearly movable. For this purpose, a guide web 37 is arranged and formed on the upper side of the ejection element 19, the longitudinal axis c of which runs essentially parallel to the main longitudinal axis of the stop element 19.

How out Fig. 8d can be seen, the locking element 10 on its underside a guide web 37 corresponding groove-shaped receptacle 39, so that the locking element 10 is mounted by means of this receptacle 39 via the guide bar 37 to the direction of movement of the ejection element 19 substantially normal transverse displaceable on the ejection element 19. Furthermore, a second guide web 36 extending in the longitudinal direction of the ejection element 19 is arranged on the upper side of the ejection element 19, which is substantially U-shaped in cross-section, for engagement in one of a side wall 15 of the housing 8 and one on the inside of the cover surface 14 of the housing 8 arranged web 38 formed groove 40 is formed ( Fig. 9a and 9b ).

The Fig. 8b and 8c show two perspective views of the embodiment according to Fig. 8a , from which it is apparent that the guide pin 33 of the driver 10 in a formed in the top surface 14 of the housing 8 curved guide rail 27, which is formed as a passage opening, is guided. Furthermore, it can be seen that - as in the first embodiment - in an end wall 15 of the housing 8, an outlet opening 23 is formed, through which both the stopper member 9 and the locking member 10 protrude laterally from the housing 8.

Fig. 10a shows the position of the drive mechanism 7 in the closed end position of the movable furniture part. That is, the energy storage of the drive device 18 is locked, which can be seen from the fact that the guide pin 28 of the guide lever 20 in the Deepening of the heart-shaped guideway 25 stores. The locking element 10, which is guided over the guide pin 33 in the guide track 27, is in its one end position in which it exits laterally through the housing 8 and the driver element 4 is locked.

When opening the movable furniture part of the guide pin 33 of the locking element 10 moves in the curved path 27 led down and takes in this way the guide web 37 slidably mounted locking member 10 until this reaches its second end position, in which the driver element 4 and thus the movable furniture part is released in the opening direction. In addition, the guide pin 28 of the guide lever 20 has left the heart-shaped portion of the guideway 25 ( Fig. 10b ).

When closing the movable furniture part then the stop element 9 from the driver element. 4 in the closing direction of the movable furniture part, whereby the force accumulator 24 of the drive device 18 is loaded before the guide pin 28 of the guide lever 20 in the heart-shaped portion of the guide track 25 is locked.

It goes without saying that the invention is not limited to the embodiments shown in the figures of the drawing. Thus, it would be quite possible, for example, to arrange the guideway for the locking element such that it encloses an angle ≠ 0 with the opening direction of the movable furniture part. In any event, a basic idea of the invention is, in drive mechanisms for movable furniture parts comprising a touch-latching mechanism and a locking element, to movably connect the locking element to the ejection element of the touch-latch mechanism and one of the guide track for the touch-latch Mechanism provide separate guideway for the locking element.

Claims (16)

1. A drive mechanism (7) for a furniture portion (12) mounted movably to an article of furniture (13) having a drive device (18) which is mounted displaceably with respect to a base (34) for ejecting the movable furniture portion (12) out of a closed end position into an open position, wherein the drive device (18) has an ejection element (19) which can be acted upon by a force storage means (24) and which is guided in a preferably heart-shaped guide track (25, 25') on the base (34), and a fixing element (10) for arresting the movable furniture portion (12), in particular an entrainment element (4) which is or can be associated with the movable furniture portion (12), characterised in that the fixing element (10) is mounted movably relative to the ejection element (19) and is guided in a guide track (27) which is provided on the base (34) and which is preferably separate from the guide track (25) of the ejection element (19).
2. A drive mechanism according to claim 1 characterised in that the fixing element (10) is or can be rotatably connected to the ejection element (19).
3. A drive mechanism according to claim 1 characterised in that the fixing element (10) is or can be linearly movably connected to the ejection element (19).
4. A drive mechanism according to one of claims 1 to 3 characterised in that the drive mechanism (7) has a housing (8) in which the ejection element (19) movably connected to the fixing element (10) is linearly movably mounted.
5. A drive mechanism according to claim 4 characterised in that the housing (8) has a bottom surface (11) and a top surface (14) as well as side surfaces (15) connecting same, wherein the guide track or tracks (25, 26) for the ejection element (19) and/or the fixing element (10) is or are provided in the top surface (14) and/or bottom surface (11) of the housing (8).
6. A drive mechanism according to claim 5 characterised in that the top surface (14) of the housing (8) forms the base (34), in relation to which the drive device (18) is displaceably mounted.
7. A drive mechanism according to one of claims 4 or 6 characterised in that the housing (8) is of a substantially parallelepipedic configuration, wherein the bottom surface (11) is larger than the top surface (14) or vice-versa and is provided for fixing the housing (8) to the article of furniture, preferably to a drawer guide system (1).
8. A drive mechanism according to one of claims 1 to 7 characterised in that the ejection element (19) has two ends (21, 21') and side surfaces (35) connecting them and provided at a side surface (35) of the ejection element (19) is an abutment element (9) for an entrainment element (4) which is or can be associated with the movable furniture portion (12).
9. A drive mechanism according to claim 8 characterised in that the abutment surface (22) of the abutment element (9) and the ends (21, 21') of the ejection element (19) which preferably extend parallel lie in different planes.
10. A drive mechanism according to claim 8 or claim 9 characterised in that the fixing element (10) is arranged on the ejection element (19) in such a way that the entrainment element (4) is arrested at least in the closed end position of the movable furniture portion (12) between the abutment element (9) and the fixing element (10).
11. A drive mechanism according to one of claims 8 to 10 characterised in that the housing (8) of the drive mechanism (7) has in a side surface (15) an elongate exit opening (23) for the abutment element (9) and the fixing element (10).
12. A drive mechanism according to one of claims 1 to 11 characterised in that the fixing element (10) is of a pawl-shaped configuration and has a contact portion (29) for bearing against a corresponding portion (31) of the abutment element (9), and a locking portion (30) for engaging behind an entrainment element (4) bearing against the contact surface (22) of the abutment element (9).
13. A drive mechanism according to claim 12 characterised in that the fixing element (10) is connected at one end hingedly to the ejection element (19) and is guided pivotably by way of a guide pin (33) preferably arranged in the region of the contact portion (29) in a guide track (27) on the base (34) of the drive mechanism (7) between a first end position of releasing the entrainment element (4) in the opening direction (OR) of the movable furniture portion (4) and a second end position of arresting the entrainment element (4) in the opening direction (OR).
14. A drive mechanism according to claim 13 characterised in that the guide track (27) for the fixing element (10) is provided inwardly on the top surface (14) of the housing (8) of the drive device (7).
15. A drive mechanism according to one of claims 1 to 14 characterised in that the guide track (27) for the fixing element (10) extends in an arcuate configuration.
16. A drive mechanism according to claim 8 characterised in that the abutment element (9) is guided movably in a guide track (26) which is provided on the base (34) and which preferably extends parallel to the opening direction (OR) of the movable furniture portion (12).

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