EP2142046B1 - Piece of furniture, and mechanism for ejecting a furniture part movably received on a stationary furniture part - Google Patents

Abstract

Disclosed is a mechanism for ejecting a furniture part that is movably received on a stationary furniture part. Said mechanism comprises an ejection element (7) which can be swiveled using a drive unit (13a), is mounted on one of the two furniture parts, and is temporarily in contact with the other furniture part to eject the movable furniture part in order to interrupt the contact between the ejection element (7) and the other furniture part during an ejection process. The disclosed mechanism further comprises control means for predefining a swiveling course of the ejection element (7). According to the invention, stationary supporting means (15, 15a) are provided on the ejection element (7). During an ejection process, said supporting means (15, 15a) rest against a guiding section (11a) of a control element (11) that can be rotated using the drive unit (13a).

Description

The invention relates to a device according to the preamble of claim 1 and a furniture according to claim 12.

State of the art

Apparatus for ejecting a movable furniture part or to move it out of a closed position on a stationary furniture part over a partial distance, are known. In this case, drawers, doors, flaps or other movable furniture parts of a piece of furniture can be moved by at least a comparatively small distance, in order then to be able to move on manually, for example. For example, in the case of drawers displaceably received relative to a body, it may be desirable to move the drawer out of a closed position or out of a body retracted position by means of a driven ejection element, in particular over a relatively short distance, eg by about 30 to 70 millimeters. The thus partially opened drawer can move a little further without further drive or can then be opened or closed again by hand conventionally by hand. For this purpose, for example, a pivotable via a drive unit ejection element can be used.

The WO 2006/017864 A1 relates to an ejection device for a movably mounted in or on a furniture body furniture part, with a pivotally mounted lever, wherein at the free end of the lever, a first roller is arranged, wherein the lever spaced from the free end of the lever, a second roller is arranged.

Purpose and advantages of the invention

Object of the present invention is to provide a corresponding piece of furniture or a device of the type mentioned above, which is technically or economically advantageous for a variety of applications. In particular, the reliability and ease of use of such devices should be improved.

This object is solved by the claims 1 and 12. In the dependent claims advantageous embodiments of the invention are shown.

The invention relates to a device for ejecting a furniture part, which is movably received on a fixed furniture part, with a pivotable about a drive unit ejection element that is attached to one of the two furniture parts and temporarily in contact with the other furniture part to the movable furniture part to eject, with the intention that during a discharge operation, the contact between the discharge element and the other furniture part is canceled and with control means for specifying a pivoting course of the discharge element. A first essential aspect of the invention resides in the fact that support means fixedly positioned on the ejection element are provided which, in the case of an ejection process, are supported on a guide section which comprises a surface and a steep course of a control element rotatable via the drive unit. In this way, the ejection process can be realized reliably. In particular, the ejection element can be guided exactly during its pivoting movement or can be transmitted via the support means comparatively high forces from the ejection element to the relevant other furniture part. In particular, the support means are so matched to the guide portion of the control that over the entire pivoting of the ejection element a Support and thus a guide of the ejection element is ensured. The support means may in particular be formed integrally with the ejection element or from a base part of the ejection element. A special equipment of the support means is also possible, for example, to increase the mechanical strength, for example by stiffening agents.

It is also conceivable that the fixed positioning of the support means at different locations on the ejection element can be adjustably set to e.g. To allow different Abstützhöhen or support points with the support means. With the help of the support means they can store the ejection element on the guide section in the manner of a support. Thus, the movement of the ejection element can be better managed, in particular since an additional bearing function is provided by means of the support means in addition to a bearing point in the region of a pivot axis of the ejection element.

Furthermore, it is advantageous that the ejection element is moved indirectly by the drive unit. The movement is transmitted to the ejection element by the driven control. This can be achieved in particular a longer life or better assembly and disassembly of the device. The ejection element can in particular be mechanically relatively robust and uncomplicated.

The driven rotational movement of the control element can also be set up comparatively easily with respect to a drive for a pivoting movement of the ejection element, since, for example, a drive transmission to the ejection element in the region of the pivot axis would be mechanically or spatially more difficult.

With the proposed device, e.g. when the movable furniture part is a drawer, the drawer movably received on a furniture body via a guide device, are ejected by the ejection process over a relatively small driven path of about 50 millimeters (mm) preferably between 30 and 70 mm with subsequent freewheel. The further or residual movement of the drawer into an open position can be done in particular in a conventional manner, for example by pulling or pushing in by hand. When closing the drawer, the last section of the closing can be done conventionally or optionally damped or under the action of a automatic or other additional means.

It is often preferred if the ejection element is attached to the stationary furniture part, but the ejection element can also be arranged on the movable furniture part.

Another essential aspect of the invention is that a control unit rotatable via the drive unit is provided, with which the impact element can be pivoted continuously repeatable from a starting position to a maximum pivoting position and back to the next starting position without reversing the direction of rotation of the control. Thus, the drive unit or a transmission to the rotatable control element and a necessary control unit for controlling the drive unit can be designed comparatively simple. In particular, it is advantageous, for example, for reasons of wear or to minimize noise, that no reversal of the direction of movement of the control or the driving direction of rotation is required. Rather, the ejection element can very quickly cause an ejection process and then be provided immediately for a next possible ejection operation in the corresponding position or the starting position.

It is also proposed that an overload protection is provided, with which a reversal of the direction of rotation of the control can take place during the ejection process at a predeterminable force on the ejection element, which counteracts a pivoting movement for ejecting the movable furniture part. With the reversal of the direction of rotation of the control element and the ejection element can swing back so that the movable furniture part moves in the closing direction or at least not further moved in the opening direction. This can be excluded in particular otherwise possibly occurring damage or overload on the ejection element, on the drive unit, the ejection element or the control. With the overload protection, the direction of rotation of the control can be reversed, for example when the resistance to the ejection movement has been reached in particular. if a person is standing in front of the movable furniture part or in its movement path that can be painted over during the ejection process.

It is also proposed that the ejection element can be pivoted from the starting position into the maximum pivoting position and back into the starting position with a maximum of one complete revolution of the control element. In this way, the pivoting of the ejection element can be realized in particular without complex gear stages or ratios or with a relatively low susceptibility. In addition, a desired pivoting position can thus be taken relatively quickly or a pivoting operation or an ejection process can be carried out. If necessary, the number of components can also be kept low with this arrangement.

In a further preferred embodiment of the subject invention, the support means and the guide portion are formed coordinated with each other to in each pivoting position of the ejection element to allow its support. For a particularly stable and finely tuned leadership of the ejection element is realized. In addition, comparatively high forces can be transmitted from the ejection element to the relevant other furniture part in all pivoting positions of the ejection element. With the support, the entire ejection structure can be stabilized, in particular when the ejection element is designed as a pivotable ejection lever with a free end remote from the pivot axis, which is not guided or supported. Thus, such an ejection lever can perform a defined movement, wherein the movement shows no or only slight deviations from an ideal line.

Furthermore, it is proposed that the guide section be formed on the control in such a way that, with the rotation of the control element, the support means can roll or slide along the guide section. Thus, the ejection element can be performed very evenly or pivoted almost vibration-free. Furthermore, friction losses can be minimized by moving past sections of the support means and the guide section. In addition, if necessary, an unwanted comparatively high noise development can be prevented or at least reduced.

Advantageously, the guide section is designed as a track rotating with the rotation of the control element. With the encircling track, which is coupled to the rotation of the control element, a particularly exact or continuously provided guidance of the ejection element can be realized. The circumferential track may be formed so as to guide the moving portion of the support means precisely and smoothly, whereby the pivotal movement of the ejection element in particular at any time of the Pivoting movement is executable according to an ideal line.

Preferably, the guide portion is formed such that with the rotation of the control portions of the guide portion with different courses are effective. This allows decoupled from the design of the ejection element alone by the specification of the guide portion desired movement patterns or patterns of the ejection realize. This is particularly advantageous if the swivel angle of the ejection element swept over per unit of time can clearly differ within one ejection process.

It is particularly advantageous that the guide section comprises a flat and a steep course, wherein the flat profile is preferably longer than the steep course. Thus, a profile of the pivoting movement of the ejection element can be adapted to a desired dynamics of the ejection process or the pivoting of the ejection element particularly advantageous. In particular, a comparatively uniform or rapid ejection can be realized from a closed position of the movable furniture part, in particular via the flat profile of the guide section. Immediately after the ejection or after the release of the ejection element from the respective furniture part can further be made possible a quick return to a starting position of the ejection element, in particular over the steep course of the guide portion. If a wrong movable furniture part has been opened, it can advantageously be quickly closed again without the ejection element interfering or getting in the way. In principle, of course, a consistently uniform or a hardly changing course of the guide portion is possible, whereby a correspondingly uniform pivoting movement of the ejection element is coupled.

In a further preferred embodiment of the subject invention, the control comprises a portion with a tooth profile, via which a drive effect of the drive unit can be applied to the control. Via a tooth profile or a toothed section, e.g. a spur or Schneckenradabschnitt a driving effect can be safely transmitted in a confined space or in a compact design in height to the control. It is particularly preferred if the toothed portion is present in an outer region of the rotary control element, whereas the guide portion, on which the support means of the ejection element move along, are provided in an inner region of the control element. The control element can be formed, in particular, from a rotating flat disc with a tooth profile formed on a radially outer narrow side and a guide section lying on the inside.

In a further particularly preferred embodiment of the subject invention, the control is designed as a cam. A cam can be designed particularly simple or space-saving. In particular, the radially outer circumferential narrow side can be designed as a guide section on the cam disk, wherein a drive effect can be applied via a drive shaft arranged eccentrically on the cam disk. Advantageously, such a tooth profile or a corresponding gear contour on the cam disc is not provided in comparison to a control with tooth profile.

Furthermore, it is proposed that sensor means for detecting a triggering action for ejecting the movable furniture part are provided. For example, by acting on the movable furniture part itself, for example by a person pressing against the movable furniture part, which corresponds to a triggering action, the ejection movement is initiated. For example, in systems with so-called touch-latch arrangements by pressing against the opening direction, the movable furniture part undergo a triggering action. For this purpose, appropriate sensor means for detecting this triggering action can be provided. For example, these may be non-contact or touch-activated sensors. For this purpose, buttons, switches, proximity sensors and the like can be counted. The sensor means can operate mechanically, optically, magnetically and / or electrically. Preferably, a Hall sensor can be used to detect a state of motion of a movable furniture part.

A triggering of the ejection process takes place only when the triggering operation is within a predetermined time window. Too short an exposure does not trigger or not too long exposure, if, for example. a person is leaning against the movable furniture part.

Furthermore, the invention relates to a piece of furniture with a relative to a fixed furniture part movable furniture part, wherein the furniture has one of the above-mentioned devices. Thus, the already mentioned advantages or features can also be realized for a corresponding furniture part.

Furniture parts are primarily furniture parts for kitchen and home furniture to understand, however, the expression furniture parts in the context of the invention may also extend to drawers, doors and flaps at other facilities, for example, a drawer on a tool cabinet or car.

The invention particularly relates to the ejection of a drawer over a small driven path with a subsequent free spout to standstill. The drive should be done by an electric motor and a manual opening and closing of the drawer should be possible without restrictions. The closing of the drawer should be done manually and their movement damping, their indentation with springs or their other functions not restrict.

This is achieved by a pivot lever which is arranged in the region between the rear wall of the body and the rear wall of the drawer and pushes the drawer by the pivoting movement to the outside. The conversion of the rotational movement of the motor into a pivotal movement of the lever is achieved via an eccentric movement of a camshaft or a cam disk. It is important to pay attention to very limited space and a gearbox for speed reduction is also provided. The most space-saving design variant is a worm gear with a tubular cam disc which is arranged within the worm wheel. In this case, two small motors can be arranged at each end of the screw to increase the drive power. In a camshaft or cam disk, different ejection speeds can be generated in different directions by different slopes at a constant speed in a constant direction. After a full revolution of the camshaft or the cam disk, the system is back in the normal position. With a direct rotary drive of the swivel axis, the direction of rotation of the motor must be changed and the respective end positions must be monitored very precisely. In particular, this applies after a power failure when the controller needs to know the exact position of the Ausschubhebels to not destroy the system by overspeeding the maximum swing angle.

In the present solution, a push-out operation can be restarted regardless of the position of the swing lever. The start and end position of the lever is determined by the defined lower and upper dead center of the cams. This top and bottom dead center may extend over a larger angle of the cam. As a result, no exact stop position of the engine is no longer necessary, even if the lever serves as a stop for the drawer and thereby defines the front gap. The outer end of the lever can also be provided with an adjustment screw to adjust the front gap.

Furthermore, for such systems, a virtually constant trailing path of the movable furniture part is advantageous for differently sized masses to be moved, wherein the mass to be moved with the movable furniture part depends primarily on the structure of the movable furniture part itself or, if applicable, its load , This may require different ejection parameters or speeds.

For safety reasons, it may be necessary that the movable furniture part does not extend or in the case of an overload or if a person is in the path of movement of the movable furniture part, the extension of the load is interrupted. This can be done, for example, by a structural adaptation of the ejection element or be solved mechanically.

The fastening of the system takes place, for example, on sections of the stationary furniture part, preferably on cross-sections made of longitudinal profiles.

Basically, it is advantageous in the proposed arrangement that regardless of the method of attachment of the movable furniture part on the fixed furniture part, the ejection device universally attachable or this is easy to retrofit. In particular, no additional provisions for locking the movable furniture part in the closed position must be provided, since the movable furniture part can be kept in the closed position via conventional latches such as a retraction automatic. figure description

With reference to the figures, further details and features of the invention with reference to schematically illustrated embodiments are explained in detail. In the figures, corresponding parts of different embodiments are sometimes used the same reference numerals.

Figur 1

ein schematisch dargestelltes Möbel mit Schublade in perspektivischer Ansicht,

Figur 2

das Möbel gemäß Figur 1 unter Weglassung von einzelnen Teilen, wobei die Schublade geöffnet dargestellt ist,

Figur 3 bis Figur 6

eine Ansicht von oben auf das Möbel gemäß Figur 1 ohne ein Oberteil, wobei die Schublade in unterschiedlichen Stellungen vor, während und nach einem Ausstoßvorgang dargestellt ist,

Figur 7a bis Figur 7c

eine perspektivische Voll-Ansicht, eine TeilSchnittansicht und eine Teil-Frontansicht der in den Figuren 3 bis 6 eingesetzten und an einer Aufnahme angebrachten Ausstoßvorrichtung zum Ausstoßen der Schublade,

Figur 8a bis Figur 8c

die Annordnung gemäß der Figuren 7a bis 7c in einer ersten Verschwenkposition eines Ausstoßhebels in einer weiteren perspektivischen Voll-Ansicht, wobei ein Gehäuseabschnitt der Ausstoßvorrichtung weggelassen ist, und in einer Teil-Schnitt- und Teil-Frontansicht,

Figur 8d bis Figur 8e

die Ausstoßvorrichtung gemäß der Figuren 7a bis 8c in einer zweiten Verschwenkposition des Ausstoßhebels in einer Teil-Schnitt- und Teil-Frontansicht,

Figur 9

eine Steuerscheibe der Ausstoßvorrichtung gemäß der Figuren 7a bis 8e,

Figur 10

ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Ausstoßvorrichtung,

Figur 11

ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Ausstoßvorrichtung,

Figur 12 bis Figur 19

ein schematisch dargestelltes freigeschnittenes Möbel mit Schublade, die mit einer erfindungsgemäßen Ausstoßvorrichtung, die nur als Prinzipskizze gezeigt ist, ausgestoßen wird, wobei das Möbel mit geschlossener Schublade und in unterschiedlichen Ausstoßstellungen der Schublade gezeigt ist,

Figur 20 bis Figur 26

ein schematisch dargestelltes freigeschnittenes Möbel mit Schublade, die mit einer weiteren Ausstoßvorrichtung, die nur als Prinzipskizze gezeigt ist, ausgestoßen wird, wobei das Möbel mit geschlossener Schublade und in unterschiedlichen Ausstoßstellungen der Schublade gezeigt ist.

In detail shows

FIG. 1

a schematically illustrated furniture with drawer in perspective view,

FIG. 2

according to the furniture FIG. 1 omitting individual parts, the drawer being shown open,

FIG. 3 to FIG. 6

a view from the top of the furniture according to FIG. 1 without a top, the drawer being shown in different positions before, during and after an ejection process,

Figure 7a to Figure 7c

a full perspective view, a partial sectional view and a partial front view of the in the FIGS. 3 to 6 inserted and attached to a receptacle ejection device for ejecting the drawer,

FIG. 8a to FIG. 8c

the arrangement according to the FIGS. 7a to 7c in a first pivot position of an ejection lever in a further full perspective view, wherein a housing portion of the ejector is omitted, and in a partial sectional and partial front view,

FIG. 8d to FIG. 8e

the ejection device according to the FIGS. 7a to 8c in a second pivoting position of the ejection lever in a partial sectional and partial front view,

FIG. 9

a control disk of the ejection device according to the FIGS. 7a to 8e .

FIG. 10

a further embodiment of an ejection device according to the invention,

FIG. 11

a further embodiment of an ejection device according to the invention,

FIG. 12 to FIG. 19

a schematically illustrated cut-open furniture with drawer, which is ejected with an ejection device according to the invention, which is shown only as a schematic diagram, wherein the furniture is shown with the drawer closed and in different ejection positions of the drawer,

FIG. 20 to FIG. 26

a schematically illustrated cut-free cabinet with drawer, which is ejected with another ejector, which is shown only as a schematic diagram, the furniture is shown with the drawer closed and in different Ausstoßstellungen the drawer.

The FIGS. 1 and 2 show a furniture 1 with a body 2 and a 2 movable in the body 2 via a pull-out drawer 3. The pull-4 includes in particular a known full extension with a drawer-side drawer rail, a body-side fixed rail and a movable between them middle rail. In FIG. 1 is the drawer 3 in a closed position, in which between the body 2 and an inner side of a front section 3a of the drawer 3, a front gap 5 is formed, for example, a few millimeters. The front section 3a has no handle in the example shown, but also a handle may be present.

The front gap serves primarily to enable a release command by pressing on the front part 3a for a discharge operation, in which the drawer 3 can be moved in the direction of the body 2 over a few millimeters, reducing the front gap 5. A triggered ejection process is carried out with an ejection device 6 according to the invention. Is in the in FIG. 1 As shown, the closed drawer 3 is pressed slightly, a movement of the drawer can be registered via, for example, corresponding sensors, not shown, whereby an ejection process by means of the ejector 6 is triggered.

FIG. 2 shows the fully opened drawer 3 in the body 2, which is shown without a side wall, rear wall and upper part. An ejection lever 7 of the ejector 6 is shown in a maximum pivoted position. The ejection lever 7 can be pivoted, for example, with respect to the rear wall of the furniture body 2, not shown, by a maximum pivoting angle of approximately 80 to approximately 90 degrees or more. By pivoting the ejection lever 7 this comes to the outside of a rear wall 3b of the drawer 3 Plant and can push the drawer 3 from a closed position in particular by a distance of, for example, about 30 to 70 mm from the closed position according to FIG. 1 move in the opening direction. For this purpose, the discharge lever 7 is moved from an applied or folded-back position into the drive unit concealed by a housing part FIG. 2 shown pivoting driven driven. Thereafter, a contact between the rear wall 3b and the ejection lever 7 is released and the moving drawer 3 can move on a bit freely. Subsequently, preferably when the drawer 3 is still a piece of free moves or as soon as the contact between the rear wall 3b and the ejection lever 7 is released, in particular by means of the drive unit of the ejection lever 7 is pivoted back into the folded back position, for a next Verschwenk- or Ejecting process ready to be. When applied position of the ejection lever 7 (not shown) whose longitudinal axis is aligned approximately parallel to the drawer rear wall 3b and to trusses 8a, 8b.

About the two trusses 8a and 8b, the ejector 6 is releasably clipped. The two trusses 8a, 8b are themselves accommodated in receiving flanges 9a and 9b, which are fastened to the side walls of the furniture body 2.

The ejection device can also be attached to the drawer 3 and moved along with it, then the ejection lever 7 can at least be ejected into contact e.g. get to the back wall of the body 2.

The ejection lever 7 is in FIG. 2 shown in its maximum pivoted position so that it is clearly visible, with completely open drawer 3 of the ejection lever 7 is usually already in its zurückgeschwenkten position or in its rest position.

In the FIGS. 3 to 6 a furniture 1 is shown from above with omission of an upper side of the body 2, the one to the ejection device according to FIG. 2 modified ejection device 6 has. The furniture body 2 shows a rear wall 2a, a right side wall 2b and a left side wall 2c. In addition, between the side walls 2b and 2c extending trusses 8a and 8b according to FIG. 2 housed, where the ejector 6 is attached. In FIG. 3 when completely closed drawer 3, the ejection lever 7 is stretched or straight in its shape and in a swung-back rest position. The ejector 6 or the trusses 8a, 8b advantageously require a comparatively small installation space, in particular in the depth of the furniture 1.

The FIGS. 4 and 5 show the ejection lever 7 in a bent shape or with a bend, wherein a front angled portion of the ejection lever 7 on a rear wall 3b of the drawer 3 area ( FIG. 4 ) or selectively ( FIG. 5 ) may be present. In FIG. 5 the ejection lever 7 is pivoted slightly further than in FIG. 4 , wherein the pivoting movement of the ejection lever 7 is effected by a drive unit, not shown. By the pivoting movement of the ejection lever 7 and its attachment to the rear wall 3b of the drawer 3, the drawer 3 from the in FIG. 3 shown closed position moves a little way in the opening direction. The drawer 3 is not by the movement of the ejection lever 7 to the fully open position according to FIG. 6 emotional. Rather, the drawer 3 is brought after the ejection movement by ejection lever 7 in a partially open position, from which, for example, a person can open the drawer 3 by hand on or close again. The sequence of movements could also be optimized so that the drawer 3 alone by the ejection process to the full or almost runs full open position.

After the ejection operation, the ejection lever 7 is immediately or shortly thereafter pivoted back to its rest position, such as FIG. 6 clarified. Due to the articulated Abknickmöglichkeit of the ejection lever of the ejection process at an angle forming ejection lever 7 in its rest position according to FIG. 3 respectively. FIG. 6 again completely stretched or space-saving in the body 2 accommodated.

The in the FIGS. 3 to 6 ejector 6 shown with the trusses 8a, 8b and receiving flanges 9a, 9b is shown in detail in the FIGS. 7a to 8e shown. The FIGS. 7a 8a and 8a show in perspective the ejection device 6, the crossbeams 8a, 8b and the receiving flanges 9a and 9b in a rest position of the ejection lever 7 (see FIG Figure 7a ) and in a partially pivoted position according to FIG. 8a , FIG. 7b shows a section along the line A - A from FIG. 7c , According to shows FIG. 8b a sectional view taken along section line B - B from FIG. 8c respectively. FIG. 8d shows a sectional view through the arrangement according to FIG. 8b along the line C - C in FIG. 8e , The pivoting movement of the ejection lever 7 is achieved by the interaction of a support pin 10 on the ejection lever 7 with a guide track 11a of a rotating steering wheel 11. In this case, the steering wheel 11 is driven in rotation via an unspecified drive unit, in particular with an electric motor.

FIG. 9 shows the steering wheel 11 highly schematic with the guide track 11a in a perspective view.

An angle α formed by the bend ( FIG. 8b ) on a side of the ejection lever 7 facing away from a side in contact with a drawer rear wall, may be a value of slightly less than 180 degrees. In principle, different total lever lengths or positions of the bend point along the ejection lever 7 are possible, whereby a driven ejection movement or an associated total ejection path can be determined. On the design of the guide track 11a, the course of the ejection movement over time or over a rotation angle of the steering wheel 11 can be determined.

Two further embodiments of the ejection device 6 are in FIG. 10 and 11 illustrated, wherein the ejection device according to FIG. 11 only by a second drive unit or a second electric motor 13b, for a transmission 14, for example in order to provide a higher drive power for the ejection process, from the ejector according to FIG. 10 different.

The ejection lever 7 is straight formed on a contact with a furniture section during the ejection process contact side 7a over almost its entire length and has a rounded portion in a front end portion.

The ejection device 6 according to FIG. 10 has a base frame 12, on which a drive unit in the form of an electric motor 13a is received with a gear 14. The transmission 14 is used to transmit a driving action on the steering wheel 11 that is provided with a cooperating with the gear outer teeth 11b. Radially further inside the steering wheel 11, a closed guide track 11a is formed. The guideway 11a serves to guide or support the ejection lever 7 via a rigidly angled support foot 15, which is provided at the end with a rotatably mounted roller 15a. About the roller 15a, the support foot 15 along the during the rotation of the steering wheel 11 spatially ramp-like rising and falling guideway 11a roll, the ejection lever is pivoted about its pivot axis S and thereby causes the ejection operation by pressing against the rear wall 3b of the drawer 3. In the Figures 10 and 11 is a front side covering housing part not shown on which the pivot bearing of the ejection lever 7 is realized about the axis S.

Individual steps of the overall process are in the FIGS. 12 to 19 shown.

In FIG. 11 is exemplified the guideway 11a, wherein upon rotation of the steering wheel 11 in the clockwise direction from the shown maximum pivoting position of the ejection lever 7 successively the sections A, B, C and D of the guide track 11a as a support surface for the support roller 15 are effective. In this direction of rotation about the axis of rotation R of the steering wheel 11 is characterized in a rotation with section A over an angle of about 120 degrees, a uniformly sloping course, with section B over an angle of about 100 degrees a consistently flat course with pivoted ejection lever 7, with section C over an angle of about 120 degrees a uniformly increasing course and with section D over an angle of about 20 degrees again a consistently flat course effective. The number of different sections, their gradients and their angular ranges can be specified individually depending on the guideway or inserted steering wheel. The steering wheel can be easily replaceable for a corresponding change in the pivoting characteristic.

The ejection device 6 is equipped for attachment to trusses with, for example, 4 attachment clips 16 arranged outside in corner regions.

The FIGS. 12 to 19 show the interaction between a drawer 3 and one on a rear wall of the body. 2 mounted ejection device 6, which has a rotatably drivable control wheel 11 and an ejection lever 7 which is pivotally received on a bearing element 17. The ejector 6 is shown only schematically without drive unit or not to scale. FIG. 12 shows the state before the start of the ejection movement in befindlichem at rest position ejection lever 7, in which a support foot 15 with a roller 15a arranged thereon along a guide track 11a during rotation of the steering wheel 11 can roll and according to the formation of the guide track 11a, the pivotal position of the ejection lever 7 to a pivot axis S (only in FIG. 12 shown). First, at the beginning of the ejection movement when the control wheel is rotated in the clockwise direction, the roller 15a rolls along a shallowly rising portion of the guide track 11a, as shown in FIG FIG. 17 a maximum pivoting position of the ejection lever 7 is not quite reached. With reaching a first edge K ( FIG. 17 and FIG. 18 ) of the guideway 11a and a subsequent relatively steeply sloping section of the guideway 11a up to a further edge K (FIG. FIG. 18 ) takes place a release of the contact between an example here or not necessarily necessarily bent contact portion 18 at the front end of the ejection lever 7 from a rear wall of the drawer instead. Immediately thereafter, the ejection lever 7 according to the falling edge of the guide track 11 a, such as FIG. 19 shows, swung back again. The drawer 3 can after the release of the ejection lever 7 a bit further until, for example, in accordance with FIG. 19 drive shown position and stop there.

The guideway 11a according to the embodiment of the FIGS. 12 to 19 essentially has two different sections, wherein for swiveling the ejection lever 7, a uniformly flat rising guideway is formed over a first portion, which, for example, at the steering wheel 11 an angular segment of about 300 to 320 degrees makes. The second section of the guide track 11a, which relates to the second steeply sloping section of the guide track in order to pivot the ejection lever 7 back relatively quickly, extends over a comparatively small angular range of, for example, 40 to 60 degrees of angle.

In the FIGS. 20 to 26 is highly schematic shows a piece of furniture without shell in the interaction between a drawer 3 and attached to a rear wall of the body 2 alternative ejection device 6 according to the invention shown. The ejection device 6 comprises an ejection lever 7 and a rotationally drivable cam wheel 19 with an eccentric arrangement of a drive axis R. The ejection device 6 is shown only schematically or without a drive unit and not to scale. A support foot 15 of the ejection lever 7 is supported on a guide track 19 a on a radial narrow side of the cam wheel 19.

With a driven rotation of the cam 19 in a clockwise direction, the drawer 3 is pivoted out of the closed position by the ejector lever 7, which can be pivoted thereby FIG. 20 about the pivoting position of the ejection lever 7 according to FIG. 21 and FIG. 22 to the maximum pivoting position of the ejection lever 7 according to FIG. 23 the drawer 3 driven ejected. The drawer 3 moves after the discharge of the ejection contact with the ejection lever 7 to a standstill position according to FIG. 26 , The ejection lever 7 pivots after the abolition of the ejection contact with the drawer 3 according to the course of the guide track 19a and the rotational movement of the cam wheel 19 back into an initial position with approximately parallel to a rear wall 2a of the body 2 aligned ejection lever 7 ( FIG. 26 ). With only one revolution of the cam wheel 19 is a complete pivoting movement with off and then pivoting back of the ejection lever. 7 allows. The guide track 19a of the cam wheel 19 has according to the sections A, B, C and D of the guide track of the steering wheel 11 according to FIG. 11 also sections A, B, C and D on (see FIG. 23 ).

LIST OF REFERENCE NUMBERS

1

Furniture

2

corpus

2a

rear wall

2 B

Side wall

2c

Side wall

3

drawer

3a

front section

3b

rear wall

4

pull-out

5

front gap

6

ejector

7

ejector lever

7a

investment side

8a

traverse

8b

traverse

9a

receiving flange

9b

receiving flange

10

support pin

11

Steering wheel

11a

guideway

11b

external teeth

12

base frame

13a

electric motor

13b

electric motor

14

transmission

15

Outrigger

15a

role

16

mounting bracket

17

bearing element

18

contact section

19

cam

19a

guideway

Claims (12)

1. Device for ejecting a furniture part (3) which is movably mountable on a fixed furniture part (2), comprising an ejection element (7) that can be pivoted by a driving unit (13a, 13b), said ejection element being attachable to one of the two furniture parts (2, 3) and being brought into temporary contact with the other furniture part, in order to eject the movable furniture part (3), with the intention that during an ejection process the contact between the ejection element (7) and the other furniture part is removed, and comprising control means for specifying a pivoting path of the ejection element (7), wherein on the ejection element (7) stationary positioned support means (15, 15a) are provided, which are supported during an ejection process on a guiding track (11a, 19a) of a control element (11, 19) that is rotatable by means of the drive unit (13a, 13b), characterised in that the guiding track (11a, 19a) has a flat and a steep section.
2. Device according to claim 1, characterised in that a control element (11, 19) is provided that is rotatable by means of the drive unit (13a, 13b), by means of which control element without reversing the direction of rotation of the control element (11, 19) the ejection element (7) can be pivoted successively repeatedly from a start position to a maximum pivoting position and back to the next start position.
3. Device according to claim 1 or 2, characterised in that an overload protection is provided by means of which during an ejection process of predeterminable force on the ejection element (7) which acts against a pivot movement for ejecting the movable furniture part (3) there can be a reversal of the rotational direction of the control element (11, 19).
4. Device according to any one of the preceding claims, characterised in that the ejection element (7) can be pivoted from the start position to the maximum pivot position and back to the start position with at the maximum a complete rotation of the control element (11, 19).
5. Device according to any one of the preceding claims, characterised in that the support means (15, 15a) and the guiding track (11a, 19a) are coordinated with one another to enable the support of the ejection element (7) in each pivoting position thereof.
6. Device according to any one of the preceding claims, characterised in that the guiding section (11a, 19a) is configured on the control element (11, 19) such that by means of the rotation of the control element (11, 19) the support means (15, 15a) can roll or slide along the guiding track (11a, 19a).
7. Device according to any one of the preceding claims, characterised in that the guiding track (11a, 19a) is configured as a track that rotates upon the rotation of the control element (11, 19).
8. Device according to any one of the preceding claims, characterised in that the guiding track (11a, 19a) is configured such that on the rotation of the control element (11, 19) sections (A, B, C, D) of the guiding track (11a, 19a) with different paths are effective.
9. Device according to any one of the preceding claims, characterised in that the control element (11) comprises a section (11b) with a toothed profile, by means of which a driving effect can be applied by the drive unit (13a, 13b) to the control element (11).
10. Device according to any one of the preceding claims, characterised in that the control element is configured as a cam disc (19).
11. Device according to any one of the preceding claims, characterised in that sensor means are provided for recognising a release action for ejecting the movable furniture part (3).
12. Piece of furniture comprising a furniture part which is movable relative to a stationary furniture part, wherein a device according to any one of the preceding claims is provided.

Images