EP3060084A1

EP3060084A1 - Drive device for a movable furniture part

Info

Publication number: EP3060084A1
Application number: EP14802585.1A
Authority: EP
Inventors: Christof GOETZ
Original assignee: Julius Blum GmbH
Current assignee: Julius Blum GmbH
Priority date: 2013-10-25
Filing date: 2014-10-22
Publication date: 2016-08-31
Anticipated expiration: 2034-10-22
Also published as: AT515040B1; JP2018153683A; ES2911305T3; MY177425A; JP2016533805A; EP3266347B1; EP3060084B1; US20160227927A1; WO2015058222A1; EP3266347A1; CN105658113A; JP6734888B2; US10051962B2; JP6378331B2; AT515040A1; CN105658113B; ES2686643T3

Abstract

The invention relates to a drive device (1) for a movable furniture part (2), comprising a force-actuated ejection element (3) for ejecting the movable furniture part (2) from a closed position (SS) into an open position (OS) and a locking device (4) for locking the ejection element (3) in a locking position (V), the locking device (4) comprising a control element (5), which is connected to the ejection element (3), and a gate (6) for the control element (5), said gate (6) having - outside an optionally present latch depression (7) - sidewall regions (8, 9) that have different hardnesses in certain sections.

Description

Drive device for a movable furniture part

The invention relates to a drive device for a movable furniture part, with a kraftbeaufschlagten ejection element for ejecting the movable furniture part from a closed position to an open position and a locking device for locking the ejection element in a locking position, wherein the locking device connected to the ejection element control and a slide track for the Has control. In addition, the invention relates to a piece of furniture with a furniture body, a furniture body movable on the furniture part and such a drive device.

In the furniture fitting industry diverse drive devices have been produced for many years, with which the opening and / or closing movement of the movable furniture part (drawer, flap, door) are supported or automatically carried out. Particularly well-known are so-called touch-latch mechanisms in which an unlocking takes place by pressing on the movable furniture part, after which the drive or ejection device opens the movable furniture part.

Particularly suitable for such mechanisms lockable controls that are guided in a slide track. In most cases, these slide tracks are heart-curved in shape and have a heart-curve-shaped section in which the control element is held or locked in a locking position of the locking device. By overpressing the movable furniture part in a behind the closed position overpressure position then the control of this locking position (detent recess) is released, after which the kraftbeaufschlagte ejection element can move freely and ejects the movable furniture part in the opening direction.

In addition to the purely mechanical or functional requirements for such drive devices, the requirements for user-friendliness and ease of use have recently increased. An important aspect is also the noise, which is quite high in many currently known drive devices. This is due, among other things, to the quite large forces acting and also to the play between the moving components. Among other things, a source of noise is touching or hitting the control in the slide track, especially at sidewalls of the slide track. The object of the present invention is therefore to provide a comparison with the prior art improved drive device. In particular, the noise is to be reduced. This is achieved by a drive device having the features of claim 1. Accordingly, the invention provides that the slide track - outside of a possibly existing detent recess - partially different hard side wall areas. These different hard side wall areas make it possible to design the slide track in such a way that where a particularly high noise development has been detected in the area of the slide track, the side wall area is formed with a correspondingly different hardness or surface design.

Although there are already writings show a resilient detent recess, for example, the resilient leg of the spring element in the detent recess area of DE 10 201 1 002 212 A1 or the resilient stop element as part of the detent recess of CA 2 743 055 A1. However, this flexibility serves exclusively to allow unlocking by pulling in the opening direction and not to prevent the generation of noise. In contrast, in the drive device according to the invention - in other words - the slide track partially different hard side wall areas, wherein when the slide track has a detent recess, these different hard side wall areas are formed outside of this detent recess.

For this purpose, it may be particularly preferable for the slide track to have at least one hard sidewall region and at least one soft sidewall region. Accordingly, the soft sidewall area serves as a stop for the control in the particularly stressed or noise-prone areas. These areas are especially to be found where the slide track has a great leadership function for the control. In the other areas, where only a small guide function is necessary - that is, where the control moves by itself without guidance also almost exactly along the slide track - the side wall portion may be formed hard.

The entire slide track can be composed of different parts. It can also be present as a separate component of the drive device. Particularly preferably, however, it is provided that the slide track is formed in a carrier made of plastic, preferably of polyamide-6, wherein the side wall portions are at least partially formed by the material of the carrier itself. Thus, the carrier itself forms essential parts of the slide track. Particularly preferably, the plastic of the carrier is an injection molded part. alternative For the production of polyamide-6, this carrier can also consist of comparable thermoplastics or semi-crystalline thermoplastics. Also plastic mixtures are possible.

In principle, two variants can be used for the formation of the soft sidewall regions. These two variants can also be present mixed in a single slide track. According to the first variant, it is accordingly provided that the material of the side wall region itself is softer and thus more yielding. This is, so to speak, a "material-related" variant for creating a soft sidewall region, but there is also the possibility of "geometrically" creating a softer sidewall region. In this case, the material itself does not have to be softer than, for example, in the hard sidewall region, but it is formed by a thinner design of the side wall this yielding and thus "soft" and thus also yielding when the side element.

According to the first embodiment, it is preferably provided that the at least one, soft side wall portion of a rubber-elastic material, preferably of a thermoplastic elastomer, is formed. Particularly preferably, a thermoplastic polyurethane is used. Also material mixtures are possible. Particularly preferably, it is provided here that the at least one, soft side wall area is designed in the form of a pad formed separately from the carrier. That is, this edition is attached as an independent component on the carrier and forms the slide track with. Specifically, it may be provided for this purpose that the at least one soft sidewall region has a hardness between 40 and 95 Shore A, preferably between 70 and 80 Shore A. In a test method based on DIN ISO 7619-1, a hardness of 78 Shore A was found in a thermoplastic polyurethane. This hardness is the mechanical resistance, which opposes a material of the mechanical introduction of a harder specimen. In other words, this hardness is the mechanical resistance that the slide track opposes the mechanical striking of the control. For the second embodiment, it is preferably provided that the at least one, soft side wall region is thin-walled with a wall thickness of less than 0.6 mm, preferably between 0.5 and 0.3 mm. On the side facing away from the slide track side of this soft side wall region is a free space or a recess. In this clearance, the thin side wall is urged or bent in an impact of the control. This clearance is preferably elongated and formed substantially parallel to the slide track surface in this soft sidewall region. Due to this thinner design of the side wall, the material is not softer in itself, but this thin area gives way when the control strikes and reduces the noise due to the deformation. In order to enable a simple production here, it is preferably provided that the at least one thin-walled, soft side wall region is formed integrally with the carrier.

The carrier is basically formed of a harder material than the pads. The hardness can be better expressed for this carrier on the elastic modulus than a Shore value. Therefore, it is preferably provided that the carrier has a modulus of elasticity between 1 .000 and 20,000 MPa, preferably between 4,000 and 6,000 MPa. Preferably, the modulus of elasticity is 5,000 MPa. In itself, however, the carrier may also have differently hard or elastic regions. Basically, it should also be mentioned that the entire slide track can have a wide variety of types and sizes of elastic moduli or hardnesses. Preferably, however, only two different types are provided, namely a hard area with hard side wall areas, wherein the elastic modulus is the same in all these hard side wall areas. Second, a soft sidewall portion is provided. Preferably, the Shore hardness is the same in all soft sidewall areas of a rubber-elastic material. In contrast, the likewise soft, but thin-walled side wall regions preferably have the same modulus of elasticity as the hard side wall regions, but are made resilient or elastic by their geometry. However, common to these two types of soft sidewall regions is that at the same sidewall impact velocity, the deformation of the surface of the soft sidewall region is greater than the deformation of the hard sidewall region. Thus, the soft sidewall region forms a crush zone upon impact of the control. The deformation can be different within the differently shaped and arranged at different locations soft side wall portions. It is essential, however, that the deformation in each soft sidewall region is always greater than in the hard sidewall regions. Provided, of course, the same impact velocity and at least a similar impact angle of the control are present. In other words, causes the same force by the control in the hard sidewall area less deformation than in the soft sidewall area.

Depending on the exact configuration of the entire slide track, a wide variety of track areas can be provided with a soft sidewall area. As already indicated, however, it is preferably provided that the slide track has deflection areas and stop areas for the control element, the at least one, soft side wall area being formed in these deflection areas or stop areas. These deflection areas or Stop areas are especially to be found where a high spring force acts by the control transversely on the side wall of the slide track. In contrast, there are other areas in which the force on the control element acts substantially parallel to the side wall, so that at most frictional forces between the control element and the side wall occur. In these areas, it is not necessary to make the side wall particularly soft.

According to a preferred embodiment of the present invention can be provided that the slide track has a detent recess in which the control rests in the locking position of the locking device. Basically, of course, the slide track in this locking recess have a soft side wall area. According to the invention but the slide track outside this Rastmuide partially different hard Seitenwandbere surface on.

Furthermore, it can preferably be provided that the slide track for the control has a latching section in the form of the latching recess, an overpressing section with a deflection bevel, an ejection section, a change section, a bearing section and a clamping section. In the overpressure section and in the discharge section, no high noise developments are generally to be feared. However, these can occur in the interchangeable section in which a change of the control element takes place between the ejection section and the clamping section. Even in a bearing section, in which the control is held in befindlicher in free-running movable furniture part, noise may occur when hitting. Also in the tensioning section, this can be done by the curved design of the slide track. Therefore, it is preferably provided that only the changing portion, the bearing portion and the clamping portion at least partially have a soft side wall portion. This is particularly advantageous because exactly in these sections are the deflection or stop areas for the control.

In general it can be provided that the ejection element is mounted linearly movable on the carrier, wherein the ejection element of a on the one hand on the carrier and on the other hand on the ejection element ejection force accumulator, preferably in the form of a tension spring, is subjected to a force.

For a simple movement possibility of the control is preferably provided that the, preferably pin-shaped, control element is arranged on a movable on the ejection element, preferably pivotally mounted control lever. Furthermore, it is preferably provided that the locking device can be unlocked by overpressing the movable furniture part in a lying behind the closed position Überdrückstellung. Of course, a release can be done by pulling the movable furniture part. Preferably, however, provided that when pulling the movable furniture part no unlocking, but the movable furniture part can be easily pulled without unlocking the locking device in the opening direction.

In order to enable not only an automatic opening movement, preferably a, preferably damped by a damping device, retraction device for pulling the movable furniture part from an open position in the closing direction is provided in the closed position.

Protection is also desired for a piece of furniture with a furniture body, a furniture part movably mounted on the furniture body, and a drive device according to the invention. It can be provided that the drive device is associated with the furniture body and acts on a arranged on the movable furniture part driver or directly on the movable furniture part. Preferably, however, it is provided that the drive device is associated with the movable furniture part and repels on the furniture body or on a furniture body fixed carrier.

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. 1 shows schematically a piece of furniture with movable furniture parts in different

positions

2 and 3 a drive device in exploded views,

4 shows the carrier with the soft sidewall regions forming pads,

Fig. 5 to 1 1 are plan views and perspective views of the control in different sections of the slide track and

12a to 15b show a schematic comparison of differently shaped hard and soft side wall regions.

In Fig. 1, a furniture 17 is shown schematically consisting of a furniture body 18 and a plurality of movable furniture parts 2 (drawers). As essential components in this case has a movable furniture part 2, the drawer container 21 and the front panel 20. The movable furniture part 2 is movably mounted on the furniture body 18 via a pull-out guide 24, wherein the pull-out guide 24 has a cabinet rail 23, optionally a middle rail, not shown, and a drawer rail 22.

At the very top shown movable furniture part 2 or at the drawer rail 22, the drive device 1 is attached via the carrier 10. The slide track 6 is formed in the carrier 10 and forms together with the control element 5, the locking device 4 for the ejection element 3. The ejection element 3 in turn can be coupled via the driver 19 with the carcass rail 23 and the furniture body 18. The top drawer is in an open position OS. At the same time, the ejection force accumulator 13 (in this case, a compression spring) is relaxed and the ejection element 3 is not locked by the control element 5 in the latching region R of the slide track 6. Rather, the control element 5 is located in a region facing away from the latching region R.

Now, if the movable furniture part 2 is moved in the closing direction SR from this open position OS (see second drawer from above), then due to the manual pressure on the movable furniture part 2 under coupling of the ejection element 3 with the driver 19 of the ejection force memory 13 is stretched, resulting in the control 5 moves into the latching region R. This is the locking device 4 in the locking position V. This is not apparent in this schematic drawing, but can be understood from the drawings below.

Once this locking position V is reached, the only schematically indicated retraction device 16 together with damping device 15, the movable furniture part 2 in the firing position SS move (see third drawer from above). Also in this shooting position SS, the locking device 4 is locked in the locking position V.

If then manually pressed on top of the movable furniture part 2 according to the fourth drawer from above, the movable furniture part 2 enters a lying behind the closed position SS Überdrückstellung ÜS, in which the unlocking of the locking device 4 takes place. As a result, the ejection force accumulator 13 can relax and the movable furniture part 2 is ejected in the opening direction OR, so that the open position OS according to the uppermost drawer is reached again.

A concrete embodiment of a drive device 1 is shown in the exploded views of FIG. 2 and 3. Accordingly, the drive device 1, the carrier 10 and the cover 26, wherein the slide track 6 is formed in two components. The carrier 10 and the lid 26 together form the housing of Drive device 1. In this case or on the carrier 1 0, the ejection slide 3 is mounted linearly movable. The ejection element 3 is subjected to a force from the ejection energy accumulator 13 (two tension springs). The ejection force accumulator 13 is connected via the spring base 33 on the one hand to the carrier 10 and on the other hand to the ejection element 3 via the spring base 34. On the ejection element 3, the control lever 4 is pivotally mounted on the axis of rotation 29. At the ejection element remote end of this control lever 4, the peg-shaped or cylindrical control element 5 is arranged, said control element 5 is guided in the slide track 6. In the region of the ejection element, the guide roller 32 is also provided for the ejection element, wherein the guide roller 32 is guided in the guide track 40 formed in the carrier 10 and in the lid 26. On the support 10 of the Verrastungsdämpfer 30 is rotatably supported for the control element 5, wherein this is held by the holder 31 on the carrier 10. Furthermore, a retraction device 16 is provided together with not shown Einziehkraftspeicher, the retraction device 16 is guided in the guideway 35 movable. At this retraction device 16 and the catch lever 25 is pivotally mounted, via which a coupling with the driver 19, not shown here takes place. Furthermore, the components of a synchronizing device 27 are shown in FIGS. 2 and 3, via which synchronization with a drive device 1 arranged on the opposite side of the furniture body 18 can take place. In addition, a Tiefenverstellrad 28 is provided, with which the relative position of the housing to the drawer rail 22 and the movable furniture part 2 can be adjusted.

As can already be clearly seen in FIGS. 2 and 3, two supports 11 are arranged in the carrier 10, which form the soft side wall regions 9 of the slide track 6. These conditions 1 1 are in the carrier 10 z. B. positively and / or frictionally secured, held or used. As can also be seen from FIG. 4, the majority of the slide track 6 is formed integrally with the carrier 10 or the carrier 10 forms the majority of the slide track 6. This carrier 10 is injection-molded from a polyamide-6 and thus forms the hard side wall regions 8 Sliding track 6, but also a soft side wall portion 9 may be formed from this polyamide-6 or directly from the carrier 10, in which case a softer stop for the control 5 is achieved by the geometry and a thin wall.

In Fig. 5, the essential portions of the slide track 6 are illustrated. The control element 5 rests in the latching recess 7 of the latching section R. In this area, a recess 37 is provided so that an interaction of the control element 5 with the Verrastungsdämpfer 30 is possible. By overpressing the movable furniture part 2 in the overpressure position ÜS, the control element 5 reaches the overpressure area Ü due to the deflection slope 12. At this overpressure area Ü directly the ejection section A closes in, in which the movable furniture part 2 is ejected. After completion of the ejection operation, it is necessary to change the control element 5 from the ejection section A to the clamping section S. This is achieved by way of the transition section W, which is arranged essentially transversely to the direction of ejection. In order to achieve a subsequent freewheeling of the movable furniture part 2, the bearing section L is formed on the locking section remote end of the slide track 6. At this the clamping section S connects. In turn, this locking section S is followed by the locking section VA, which finally opens into the latching region R. Essential for the present invention is now that the slide track 6 outside the detent recess 7 partially different hard side wall portions 8 and 9 has. The soft side wall portion 9 serve to reduce noise due to the impact of the control element 5 on the side walls of the slide track 6. For this purpose, the arranged in the clamping section S and the bearing section L pads 1 1 made of a softer material (thermoplastic polyurethane), which is greatly reduced upon impact of the control element 5 on these soft side wall portions 9, the noise. The same effect applies to the soft side wall region 9 in the region of the interchangeable portion W, but this is not made of a different material, but thin-walled with a wall thickness D below 0.6 mm, preferably between 0.5 mm and 0.3 mm formed is. But not only by this thin wall thickness D, this area of the change section W is resilient, it also requires the recesses 36, so that the entire thin-walled side wall portion 9 can yield when striking the control element 5. Upon impact of the control element 5, the impact energy is thus not entirely converted into noise but also into deformation, whereby noise reduction is achieved. The element 38 and the recess 39 serve as deflectors for the control element 5 in the event of a faulty operation.

FIG. 6 shows a perspective illustration, suitable for FIG. 5, of the carrier 10 together with the control element 5, wherein the control element 5 is located in the latching section R. In order not to create confusion in FIG. 5, it can be seen in FIG. 6 in which sections or areas of the slide track 6 the stop areas G and deflection areas U are located. Exactly in these known for their high noise areas G and U, therefore, the soft side wall portions 9 are provided.

In Figs. 7 to 1 1, the path of the control element 5 is also illustrated by the slide track. As soon as the manual pressure on the movable furniture part 2 nachläset, the ejection force accumulator 13, whereby the control element 5 in the ejection section A as shown in FIGS. 8a and 8b emotional. At the end of this ejection section A Finally, the control element 5 enters the change section W according to FIGS. 9a and 9b. The impact on the side wall of this exchangeable portion W is partially absorbed or damped by the soft sidewall portion 9. Subsequently, the control element 5 often passes with quite considerable force into the bearing section L according to FIGS. 10a and 10b, where the impact there is cushioned by the side wall region 9 consisting of a rubber-elastic material. Thus, a lower noise is given in this stop area G. During the subsequent tensioning of the ejection force accumulator 13 according to FIG. 1, the control element 5 moves through the clamping section S. In the deflection region U, a noise generation is reduced by the soft sidewall region 9 consisting of a rubber-elastic material.

FIGS. 12a to 15b schematically show a comparison of the differently formed sidewall regions and the different effect of these sidewall regions upon impact of the control element 5 with the same impact energy F. In FIG. 12a, the control element 5 can be seen on the hard sidewall region 8 before the impact. The impact energy F depends on the speed, on the impact angle and on the force of the force accumulator acting on the control element 5 (ejection energy accumulator 13). As can be seen in FIG. 12b, the hard sidewall region 8 does not yield or only minimally on impact, as a result of which the generation of noise is relatively large. According to FIG. 13 a, the control element 5 is moved with the same impact energy F in the direction of the soft side wall region 9 in the form of the support 11. When impacting according to FIG. 13b, the impact energy F is at least partially absorbed by the soft side wall region 9 by its deformation. It thus deforms - in contrast to the hard side wall region 8 - the surface against the unloaded state in Fig. 13a. The impact energy 5 is thus partially converted into a deformation of the soft side wall region 9, which is why the generation of noise is less. The same applies to the soft side wall regions 9 according to FIGS. 14b and 15b. Upon impact of the control element 5 with the same impact energy F is a surface deformation. This is achieved on the basis of the geometric conditions (thin-walled side wall region 9 and recess 36 remote from the control element). As can be clearly seen in FIGS. 12b to 15b, in the case of each variant of the soft side wall region 9, a greater penetration depth of the control element 5 into the slide track surface than in the case of the hard sidewall region 8 is present.

In summary, in the present invention, therefore, the noise attenuation in the heart curve (slide track 6) of a touch-latch mechanism (drive device 1). During the opening and closing movement of a furniture fitting with ejection function, load changes or switching points of the control pin occur within the heart curve (Control 5). All of these points in the heart curve produce more or less loud sounds. To prevent or reduce these, these points in the heart curve are performed by soft parts or damping elements (soft side wall regions 9) or by specially designed wall thicknesses that allow yielding.

Claims

Patent claims

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

- A force-applied ejection element (3) for ejecting the movable furniture part

(2) from a closed position (SS) to an open position (OS) and

- A locking device (4) for locking the ejection element

(3) in a locking position (V), the locking device

(4) a control element (5) connected to the ejection element (3) and a slide track (6) for the control element

(5) has,

characterized in that the slide track (6) - outside of any locking recess (7) which may be present - has side wall areas (8, 9) of different hardness in some areas.

Drive device according to claim 1, characterized in that the link track (6) is formed in a carrier (10) made of plastic, preferably made of polyamide-6, the side wall regions (8, 9) being at least partially made of the material of the carrier (0) itself are formed.

Drive device according to claim 1 or 2, characterized in that the sliding track

(6) has at least one hard side wall area (8) and at least one soft side wall area (9).

Drive device according to claim 3, characterized in that the at least one soft side wall region (9) is formed from a rubber-elastic material, preferably from thermoplastic polyurethane.

Drive device according to claim 3 or 4, characterized in that the at least one soft side wall region (9) is designed in the form of a support (1 1) which is formed separately from the carrier (10).

Drive device according to one of claims 3 to 5, characterized in that the at least one soft side wall region (9) has a hardness between 40 and 95 Shore A, preferably between 70 and 80 Shore A.

7. Drive device according to claim 3, characterized in that the at least one soft side wall region (9) is thin-walled with a wall thickness (D) of less than 0.6 mm, preferably between 0.5 mm and 0.3 mm.

8. Drive device according to claim 7, characterized in that the at least one thin-walled, soft side wall region (9) is formed in one piece with the carrier (10).

9. Drive device according to one of claims 2 to 8, characterized in that the carrier (10) has a modulus of elasticity between 1,000 and 20,000 Pa, preferably between 4,000 and 6,000 MPa.

10. Drive device according to one of claims 1 to 9, characterized in that the link track (6) has deflection areas (U) and stop areas (G) for the control element (5), in which deflection areas (U) or stop areas (G) the at least one soft side wall area (9) is formed.

1 1 . Drive device according to one of claims 1 to 10, characterized in that the link track (6) has a locking trough (7) in which the control element (5) rests in the locking position (V) of the locking device (4).

12. Drive device according to one of claims 1 to 1 1, characterized in that the link track (6) for the control element (5) has a locking section (R) in the form of the locking trough (7), a press-over section (Ü) with a deflection slope (12 ), an ejection section (A), a changing section (W), a storage section (L) and a clamping section (S).

13. Drive device according to claim 12, characterized in that only the changing section (W), the bearing section (L) and the clamping section (S) at least partially have a soft side wall area (9).

14. Drive device according to one of claims 1 to 13, characterized in that the ejection element (3) is mounted on the carrier (10) so that it can be moved linearly.

15. Drive device according to one of claims 1 to 14, characterized in that the ejection element (3) on the one hand on the carrier (10) and on the other hand The ejection force accumulator (13) attached to the ejection element (3), preferably in the form of a tension spring, is subjected to force.

16. Drive device according to one of claims 1 to 15, characterized in that the, preferably pin-shaped, control element (5) is arranged on a control lever (14) which is movably, preferably pivotably, mounted on the ejection element (3).

17. Drive device according to one of claims 1 to 16, characterized in that the locking device (4) can be unlocked by overpressing the movable furniture part (2) into an overpressure position (ÜS) located behind the closed position (SS).

18. Drive device according to one of claims 1 to 17, characterized by a retraction device (16), preferably damped by a damping device (15), for retracting the movable furniture part (2) from an open position (OS) in the closing direction (SR) into the closed position (SS).

19. Furniture (17) with a furniture body (18), a furniture part (2) movably mounted on the furniture body (18) and a drive device (1) according to one of claims 1 to 18.