EP2142045A2

EP2142045A2 - Piece of furniture and device for ejecting a furniture part

Info

Publication number: EP2142045A2
Application number: EP08749260A
Authority: EP
Inventors: Klaus Schneider; Harry Gehrer
Original assignee: Grass GmbH
Current assignee: Grass GmbH
Priority date: 2007-04-30
Filing date: 2008-04-30
Publication date: 2010-01-13
Anticipated expiration: 2028-04-30
Also published as: CN102318965A; DE202007006302U1; WO2008131967A3; CN102318965B; EP2142045B1; WO2008131967A2; CN101674755B; CN101674755A; US20100084954A1

Abstract

The invention relates to a piece of furniture and to a device for ejecting a furniture part (3) which is movably received on a stationary furniture part (2). The device comprises an ejection lever (7) that can be driven via a drive unit and that is present on one of the furniture parts and that is temporarily in contact with the other furniture part to eject the movable furniture part (3). The ejection lever (7) has a zone of contact within which the contact between the ejection lever (7) and the other furniture part is made. The ejection lever (7) can be driven to disengage the contact between the ejection lever (7) and the other furniture part during an ejection process. The zone of contact is preferably bent or the ejection lever is configured to elastically deform during the ejection process.

Description

"Furniture and device for ejecting a furniture part"

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

State of the art

There are already known devices for ejecting a movably received on a stationary furniture part furniture part. The ejection can take place, for example, by means of a particularly pivotable ejection lever which can be driven by a drive unit and which is attached to one of the two furniture parts and temporarily in contact with the other furniture part in order to eject the movable furniture part. The movable furniture part may be a drawer, door, flap or other movable furniture parts. The ejection lever comes into contact with the other furniture part during ejection within a contact area provided on the ejection lever, and the contact is released after ejection.

In the design of the ejection device a variety of requirements must be taken into account. On the one hand, the ejection device should be as inexpensive as possible, robust and space-saving. On the other hand, the aim is to allow comparable ejection movements of the movable furniture part, in particular even if it is with this example. By a variable load each strongly different masses must be moved.

BESTATIGUNGSKOPIE Purpose and advantages of the invention

Object of the present invention is to improve a device of the type mentioned in terms of a technical and economic realization or to provide a piece of furniture with a corresponding device.

This object is solved by the claims 1, 2, 9 and 12.

The dependent claims are directed to advantageous developments of the invention.

The invention is initially based on a device for ejecting a furniture part, which is movably received on a stationary furniture part, with a driven by a drive unit ejection lever which is attached to one of the two furniture parts and temporarily in contact with the other furniture part to the movable To eject furniture part, and the ejection lever has a contact area, within which the contact between the ejection lever and the other furniture part, wherein the ejection lever is driven, with the intention that during a ejection operation, the contact between the ejection lever and the other furniture part is canceled. An essential aspect of the invention is that the contact area has a bend. In this way, a desired course of the ejection movement or an advantageous ejection characteristic can be realized on the design of the contact area on the ejection lever or by a corresponding shaping of the ejection lever. In particular, different effective lever lengths thus come into effect during the ejection process with a relatively simply modified ejection lever. Different effective lever lengths also cause different forces or Moments that can be transmitted during the ejection process of the ejection lever on the other furniture part. This may be particularly advantageous if, for example, at the beginning of the ejection movement comparatively large forces or moments are necessary to move the movable furniture part, in particular to overcome a standstill position in the closed state of the movable furniture part. In this case, an effective lever length of the ejection lever is crucial, which depends on the lever geometry or the type of kinking. Thus, in a first phase of the ejection process, a shorter lever length can be realized than at a later time of the ejection process. Due to the bend in the contact area, the contact with the other furniture part will take place there at the beginning of the ejection movement. As a result, forces or moments can be set up in an advantageous manner for an ejection effect from the ejection lever on the furniture part to be moved. Furthermore, a particularly space-saving placement of the ejection lever can be possible with a bend in the investment area. The kinking may describe a comparatively shallow kink angle, eg lying on the side facing away from the contact area between 120 and 170 degrees or even below.

Another essential aspect of the invention is that the ejection lever is designed to deform elastically during the ejection process. By means of an elastic bending of at least parts of the ejection lever, in particular of the contact area, under load during the ejection process, a possibility can be provided for influencing the ejection process, in particular the duration and size of the forces or moments that can be transmitted by the ejection lever. The course of the ejection process can thereby be adapted to different conditions, for example to different masses to be moved during ejection. This can be done with a spring-trained ejection lever, as this depending on the strength and time change -A-

the elastic deformation during ejection makes correspondingly different ejection effects possible. Depending on the size of the mass to be moved, the ratio of the proportions of the driven path and the non-driven trailing path after the end of the drive effect may be different in order to always obtain approximately the same Gesamtausstoßweg. About the deliberately established, reproducible elasticity of the ejection lever, which has a noticeable effect on the ejection process, so to speak can implement a self-adjusting to different loads or other variable boundary conditions of the movable furniture part ejection effect.

The characteristic of the ejection process which is dependent on the elasticity of the ejection lever can be influenced, for example, by different material properties of the elastically effective part of the ejection lever or a corresponding shaping or positioning of the elastically deforming regions of the ejection lever.

Further, it is proposed that the ejection lever is formed such that a maximum change in position of one end of an elastic member of the eject lever caused by the elastic deformation at the ejection operation is at least 2%, more preferably at least 5%, relative to the length of the elastic member of the ejection lever. If, for example, an elastic part of the ejection lever bending around an attachment point is considered, the length of the elastic part of the ejection lever is approximately the distance from the attachment point to an end of the elastic part of the ejection lever which is at a distance from the attachment point. With a proposed elastic deformation of the entire ejection lever or elastically behaving portions of the ejection lever, a desired SelbstJustierung the ejection processes can be achieved particularly reliable, which is dependent on different boundary conditions such as the size of the masses to be moved.

Advantageously, the ejection lever is designed as a bending lever with a bend in the contact area, through which two substantially straight portions of the contact area are aligned at an angle to each other. For the purposes of the invention, a bend does not mean, in particular, a curved course of the contact area or should it just be avoided. By two in the bending region substantially straight sections which are aligned at an angle to each other, the ejection lever can be designed for a relatively simple and space-saving. Optionally, for reasons of space, the bend from a straight ejection lever, which is straight especially in a starting position, form only at the beginning of the ejection process or a pivoting of the ejection lever, for example when the kink is articulated.

With a bend, an exact change of an effective lever length during an ejection movement can be realized. For example, an ejection lever with a bend in the abutment region can provide a first effective lever length in a first phase of the ejection movement and a further effective lever length in the further course of the ejection movement of the ejection lever.

It is furthermore preferred that the ejection lever has a part which essentially acts rigidly during the ejection process and a part which elastically deforms during the ejection process and which in particular comprises the abutment region. The ejection lever can be easily adapted to different desired ejection characteristics. By tuning the elastically deforming part and a substantially rigid part of the ejection lever can act significantly different in the ejection process Forces are set up by the ejection lever on the other furniture part. In addition, an automatic adjustment of the ejection lever can be achieved during the ejection process. It is also possible, for example, to attach different elastically deforming parts of the ejection lever to a rigid main body of the ejection lever, depending on the desired elasticity. The two parts may be separate components or formed in one piece.

It is further proposed that the abutment region of the ejection lever is formed repeatedly kinked. By a Mehrfachabknickung or a polygonal shape of the contact area can be made possible with progressive lever movement during the ejection process, a repeatedly extending effective lever length.

It is particularly advantageous that a bend in the contact area is made rigid, so that there is no change in the bending angle formed by the bending in question during the ejection process. Thus, the ejection lever in particular easy to produce or relatively stable.

Alternatively, it may be advantageous that a bend in the contact area is designed to be elastically variable under load. In particular, the bend in the contact area can be designed to be elastically variable under load so that a change in a bending angle formed by the bending in question can take place during the ejection process. The change in the Abknickwinkels can for example be done by one or more kinks are articulated. Thus, for example, in a waiting position before or after an ejection process, the ejection lever also stretch completely, which is relatively space-saving. In addition, if a limit load on the ejection lever is exceeded, this may, if appropriate, give way at the bend points, as a result of which damage is prevented can be.

Another essential aspect of the invention is that the ejection lever is designed to allow a discharge operation in the manner of a toggle mechanism. With a toggle mechanism, high forces can be transmitted to a furniture part to be moved, especially with a pointed knee lever angle. In addition, a toggle mechanism can be accommodated particularly space-saving in a stretched position.

In particular, it is advantageous that the ejection lever comprises a toggle lever mounted on one of the furniture parts with legs bendable to one another in a head section, wherein during the ejection process the head section comes to rest directly on the other furniture part. In this way, a particularly effective power transmission during the ejection process can be realized on the other furniture part.

It is also advantageous that an overload protection is provided for the toggle mechanism, by which an evasive movement of the ejection lever against a movement necessary for the ejection operation is possible. In case of unforeseen or short-term strong mechanical loads on the furniture part to be moved against an ejection direction, damage to the toggle mechanism or to a furniture part can be avoided.

Furthermore, the invention comprises an ejection lever, which in particular is telescopic. Thus, it is conceivable that the lever is driven movable and has mutually rotatable and telescopic sections. For example, a rotary guide or a coiled groove with engagement portions running therein, a telescoping of the lever can be made possible. For example For example, an ejection lever may include a plurality of cup-like nested ejection lever elements that are telescopically or compactly mountable or extendable to each other by rotation.

The invention also relates to a piece of furniture with a movable furniture part, which is movably received on a stationary furniture part, wherein a device as explained above is provided. Thus, the advantages shown can also be achieved for a corresponding furniture part.

For safety reasons, it is necessary that in case of a false start of the system whose movable furniture part, e.g. a drawer is, does not extend or in an overload, the extension of the drawer is interrupted. Since such errors in most cases is assumed to be a fault in the control, the corresponding safety intervention must not be made by a faulty control. This is achieved in that the lever is formed in two parts and the two parts are connected to a hinge. The torques occurring in this rotary joint are preferably mechanically secured by a spring. A spring has the advantage that the intended spring force must be achieved only briefly to change the profile shape of the spring so that the other torques are no longer supported by a much softer leaf spring profile and the cycle of the cam can be completed easily. If the system moves into the home position and the top dead center is exceeded, the spring can push the two lever parts back to its original position by eliminating the spring load.

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 Ejector 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.

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

figure description

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

In detail shows

1 shows a schematically illustrated furniture with drawer in perspective view,

FIG. 2 shows the furniture according to FIG. 1 with the omission of individual parts, wherein the drawer is shown opened, 3 shows a view from above of the furniture according to FIG. 1 without an upper part, wherein the drawer is shown in different positions before, during and after an ejection process, FIG.

7a to 11c show a perspective full view, a partial sectional view and a partial front view of the ejection device used in FIGS. 3 to 6 and attached to a receptacle for ejecting the drawer with the ejection lever fully swung back, FIG.

8a to 8c show the arrangement according to FIGS. 7a to 7c in a first pivoting position of the ejection lever in a further perspective full view, a partial sectional view and a partial front view, with a housing section of the ejection device being omitted in FIG. 8a;

8d and 8e, the ejection device according to the figures 7a to 8c in a second pivoting position of the ejection lever in a partial-sectional and a partial front views,

9 shows a schematic perspective view of a control disk of the ejection device according to FIGS. 7a to 8e, FIG. FIG. 10 shows a further embodiment of an ejection device according to the invention,

FIG. 11 shows a further embodiment of an ejection device according to the invention,

FIG. 12 shows another perspective view

Embodiment of an ejection device according to the invention omitting a front housing,

13 to 15 show the ejection device according to FIG. 12 from above in a pivoted-back and two different widely pivoted positions of the ejection lever, FIG.

16 and 17 show a drawer and ejection lever of a further ejection device, which are shown only as a schematic diagram, wherein the arrangement is shown with the drawer closed and during the ejection process,

FIG. 18 shows a drawer with an alternative ejection lever according to the invention as shown in FIG. 16;

19 to 23b, another alternative ejection device according to the invention in different positions in a perspective view, in front or in top view, FIGS. 24 to 26 show an ejection lever according to the invention in a perspective view and from the side with the omission of individual parts,

FIG. 27 shows a further ejection lever according to the invention which is very similar to the ejection lever from FIGS. 24 to 26 and is shown cut away from the side during the ejection process.

FIGS. 28 and 29 show the ejection lever according to FIG. 27 in an activated overload protection in side view in full view and with parts omitted or cut away;

Figure 30 to Figure 33 is a perspective obliquely from above shown furniture, which is partly cut away or shown with the omission of parts with a highly schematic ejection device in three different furniture states,

34 shows the furniture according to the view from FIG. 31 and in an enlarged detail view in a loaded furniture state, FIG.

Figure 35 Figure 35a the furniture according to the view of Figure 32 and in an enlarged detail view in a further state of furniture and Figure 36 and Figure 37 are each a schematic diagram of different inventive ejection devices when ejecting a drawer in side view.

FIGS. 1 and 2 show a piece of furniture 1 with a body 2 and a drawer 3 which can be moved in the body 2 via a pull-out guide 4. The pull-out guide 4 comprises in particular a full extension with a drawer-side drawer rail, a body-side fixed rail and a movable one between them middle rail. In Figure 1, the drawer 3 is in a closed position in which between the body 2 and an inner side of a front end 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. If the closed drawer 3 is pressed slightly in the state shown in FIG. 1, a movement of the drawer can be registered via, for example, corresponding sensors (not shown), whereby an ejection process by means of the ejection device 6 is triggered.

Figure 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, for example, with respect to the rear wall of the furniture body 2, not shown, by a maximum pivot angle of about 80 to almost 90 degrees or more can be pivoted. By pivoting the ejection lever 7 this comes to rest on the outside of a rear wall 3b of the drawer 3 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 shown in Figure 1 in the opening direction. For this purpose, the ejection lever 7 is moved from an applied or folded-back position into the pivoting position shown in FIG. 2 via a drive unit concealed by a housing part. Thereafter, a contact between the rear wall 3b and the ejection lever 7 is released and the moving drawer 3 can move freely for a while. 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 Figure 2 in its maximum shown 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 FIGS. 3 to 6, a piece of furniture 1 is shown from above with the omission of an upper side of the body 2, which has an ejection device 6 modified with respect to the ejection device according to FIG. 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 are housed according to Figure 2, where the ejector 6 is fixed. In FIG. 3, when the drawer 3 is completely closed, 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.

Figures 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 can lie flat (Figure 4) or punctiform (Figure 5). In Figure 5, the ejection lever 7 is pivoted slightly further than in Figure 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 contact with the rear wall 3b of the drawer 3, the drawer 3 is moved from the closed position shown in Figure 3 a little way in the opening direction. The drawer 3 is not moved by the movement of the ejection lever 7 to the fully open position shown in FIG. Rather, the drawer 3 after the ejection movement by ejection lever 7 in brought 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 lags alone by the ejection process to the full or nearly complete open position.

After the ejection operation, the ejection lever 7 is swung back immediately or shortly thereafter back to its rest position, as Figure 6 illustrates. Due to the articulated Abknickmöglichkeit of the ejection lever of the ejection process at an angle forming ejection lever 7 is fully stretched in its rest position according to Figure 3 and Figure 6 again and save space in the body 2 accommodated.

The ejection device 6 shown in Figures 3 to 6 with the trusses 8a, 8b and receiving flanges 9a, 9b is shown in detail in Figures 7a to 8e. Figures 7a and 8a show in perspective the ejection device 6, the trusses 8a, 8b and the receiving flanges 9a and 9b in a rest position of the ejection lever 7 (see Figure 7a) and in a partially pivoted position of Figure 8a. Figure 7b shows a section along the line A - A of Figure 7c. Accordingly, FIG. 8b shows a sectional view according to the section line B-B from FIG. 8c, and 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 IIa 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.

Figure 9 shows the steering wheel 11 highly schematized with the Guideway IIa in perspective view.

An angle α formed by the bend (FIG. 8b) on one side of the ejection lever 7, which faces away from a side coming into 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. About the design of the guideway IIa, 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 shown in Figures 10 and 11, wherein the ejection device according to Figure 11 only by a second drive unit or a second electric motor 13b, for a transmission 14, e.g. so as to provide a higher drive power for the ejection operation, different from the ejection device according to FIG.

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 13 a with a gear 14 is accommodated. 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 IIb. Radially further inside the steering wheel 11 a closed guideway IIa is formed. The guideway IIa serves to guide or support the ejection lever 7 via a thereto rigidly angled support foot 15, which is provided at the end with a rotatably mounted roller 15a. From the prior art basically straight ejection lever are known. Via the roller 15a, the support foot 15 along the during the rotation of the steering wheel 11 spatially ramping and sloping guideway IIa roll, the ejection lever is pivoted about its pivot axis S and thereby causes the ejection process by pressing against the rear wall 3b of the drawer 3. In FIGS. 10 and 11, a housing part which covers the front is not shown, on which the pivot bearing of the ejection lever about the axis S is also realized.

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

In Figure 11, the guideway IIa is exemplified, 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 guideway IIa 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. AIs overload protection can be reversed at a particular achievable resistance to the ejection movement or the ejection lever 7, the direction of rotation of the steering wheel 11 are reversed, for example, if a person is in front of the movable furniture part or in the paintable during the ejection process movement path.

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

FIG. 12 shows a somewhat more detailed view of an ejection device 6 with an ejection lever 7 which is in a pivoted-back position or in a rest position. In Fig. 12, a front housing portion of the ejection device 6 is not shown, whereby parts for drive transmission from an electric motor 13a to the ejection lever 7 are visible. The individual components or construction elements are also shown in FIG. 12 only in a highly schematic manner.

About the electric motor 13a and the gear 14, the ejection lever 7 is rotated by the rotation thing R forward and back. To transmit the rotational movement to the ejection lever 7, the transmission 14 and further Getriebebzw. Transmission elements 18, 19 and 20 are provided with which a fixedly positioned on the ejection lever 7 rotational shaft 21 is set in rotation. The ejection lever 7 is provided on its contact side, on which a contact can be made to a acted upon by the ejection lever 7 portion of a furniture part, with a straight portion G and a curved in the front portion or convex portion K, which only in the area front half of the lever length of the ejection lever 7 is formed. During the ejection process, a position of the contact point may be substantially in the section K in Move longitudinally of the ejection lever 7.

Figures 13 to 15 show the ejector 6 of Figure 12 with the front housing portion schematically from above, wherein Figure 13 shows the state of the ejection lever 7 in a rest position or a basic position, and Figure 14 and Figure 15 different pivoting positions of the ejection lever 7 at Show ejection of a drawer, of which only a part of a drawer rear wall RW is indicated by a dashed line.

In FIG. 13, the drawer rear wall rests directly primarily on the straight section G (FIG. 12) of the ejection lever 7; in particular, a contact takes place between the drawer rear wall and the ejection lever 7. When pivoting the ejection lever 7, a situation is achieved according to Figure 14, whereas in the particular maximum pivoting state of the ejection lever 7 according to Figure 15, the contact between the drawer rear wall RW and the ejection lever 7 is just canceled. The distance X _ma χ according to Figure 15, between the position of the drawer rear wall RW in the position shown in Figure 13 and Figure 15, represents the driven ejection movement of the drawer. The subsequent movement of the drawer takes place without being driven by running. In addition, after releasing the contact between the ejection lever 7 and the drawer rear wall, the ejection lever 7 is swung back to its position shown in FIG. A contact point between the ejection lever 7 and the drawer rear wall RW upon ejection of the drawer travels along the portion K toward a front end of the eject lever 7.

FIG. 15 shows, by way of example, a maximum pivoting position of the ejection lever 7, which may, for example, show a pivoting angle of approximately 80 to approximately 90 degrees, in which case the pivoting angle shortly before the contact is released between Ejector lever 7 and the drawer rear wall RW is about 70 degrees. The ejection device 6 according to FIGS. 13 to 15 can be mounted, for example, in the region of a carcass rear wall (not shown).

For sensory detection of a movement state or a pivoting movement of the ejection lever 7, a sensor is provided with a sensor part 22a on a base body of the ejection device 6 and with a further sensor part 22b on a correspondingly positioned portion of the ejection lever 7. The sensor parts 22a, 22b in particular Be part of a Hall sensor.

A further highly schematic embodiment of an ejection lever 7 according to the invention is shown in FIGS. 16 and 17, which also shows a drawer 3 and parts of a body 2 in a highly schematized manner. The ejection lever 7 shown alone without further elements of the ejection device. The ejection lever 7 is elastically deformable during its pivoting movement under load (see FIG. 17). In this case, when the drawer is closed according to FIG. 16, the ejection lever 7 can be aligned parallel to it over a section of a drawer rear wall 3b without or without significant elastic deformation. Figure 17 shows a pivoting position of the ejection lever 7, in which the drawer 3 has been moved a distance from its closed position on the ejection lever 7. The ejection lever 7 is elastically deformed or bent over sections, as a result of which an effective lever length of the force relationships prevailing due to the drive effect can advantageously be changed with the bending.

FIG. 18 corresponds to an arrangement according to FIG. 16 with an alternative ejection lever 7 according to the invention, which is bent several times. The ejection lever 7 according to FIG. 18 has, for example, three bending points, as a result of which polygonal safely extending portion of the ejection lever results, with the drawer 3 partially spaced from the drawer rear wall 3b ejection lever 7. In this way, the rigid ejection lever 7 of Figure 18 can achieve the advantages of the ejection lever according to Figure 16 and 17 during ejection. However, the rigid ejection lever 7 requires slightly more space in the rest position relative to the elastic ejection lever. 7

Another inventive ejection lever is explained with reference to Figures 19 to 23b. There is one

Toggle mechanism formed by which a toggle lever 24 is provided for ejecting a movable furniture part. The toggle lever 24 is received on a toggle lever assembly 23. The toggle lever arrangement 23 can be fastened, for example, via attachment jaws 25a, 25b to a furniture part section, for example on opposite side walls of a furniture carcass in its rear region. The toggle lever 24 includes two toggle leg 26 and 27, which are hinged together in their head area. The toggle leg 26 is pivotally received with its end opposite the head portion of the mounting jaw 25 a. The other toggle leg 27 is also received on a movable carriage piece 28 also pivotally.

Figure 19 shows the toggle lever 24 in its nearly fully extended position, eg when a drawer rear wall of a closed drawer is positioned in front of it. In order to pivot the knee lever 24 or to enable an ejection process, an electric motor 13a is attached to a receiving piece 29. Via a drive spindle 30, which is rotatable in two directions of rotation driven by the electric motor 13a, an intermediate piece 31 can be guided guided. For this purpose, the drive spindle 30 passes through the intermediate piece 31 in a bore which has an internal thread, which with a External thread of the drive spindle 30 cooperates.

Figure 20 shows the toggle lever 24 in wasted ejection position. This is made possible by the driven movement of the intermediate piece 31 from the position shown in FIG. 19 into the position shown in FIG. With the driven displacement of the intermediate piece 31, two springs 32a, 32b are displaced so that the slide piece 28 along two trained as a round profile trusses 33a, 33b, which between the two mounting jaws 25a, 25b spaced from each other, guided, is moved. About the displacement of the springs 32a, 32b, the distance of the carriage piece 28 is reduced to the Anbringbacke 25a continuously, whereby the toggle lever 24 steeps steplessly articulated and a position shown in Figure 20 can be achieved, so that a drawer can be ejected. The springs 32a, 32b are so strong that they act like rigid elements during normal opening or no loss in the transmission of the drive action comes to the toggle 24 and the springs 32a, 32b only spring when it is in an overload situation. as explained below.

For an overload protection of the toggle lever 24 and the toggle lever assembly 23 in articulated angled knee lever legs 26 and 27, for example when a force in the direction of arrow Pl (see Figure 20) exceeds a limit, the springs 32a, 32b, for example, resiliently formed or upon overcoming a certain spring force compressible so that the overload position of the toggle lever 24 shown in Figure 21 is reached. The drive spindle 30 and the electric motor 13a thus remain without impairment or damage to the toggle lever assembly 23 can be excluded. For overload protection at a fixed position of the intermediate piece 31 according to, for example, Figure 20, the Slide piece 28 is displaced in the direction of the intermediate piece 31, wherein the springs 32a, 32b are compressed according to compressed. This allows the toggle leg 26, 27 stretch again or the toggle lever 24 is pivoted back or possibly brought into its almost extended position shown in FIG 21.

FIGS. 22a and 22b show a front view and a top view from above of the toggle lever arrangement 23 according to FIG. 19 and FIGS. 23a and 23b the corresponding views of the toggle lever arrangement 23 according to FIG. 20. FIGS. 22b and 23b in particular show the comparatively small depth dimensions of the toggle lever arrangement 23 transversely to the longitudinal extension of the toggle lever assembly 23. This allows a very compact or space-saving accommodation of the toggle lever arrangement 23 in a piece of furniture, in particular in the depth of a furniture body. The longitudinal axes of the trusses 33a, 33b may be aligned in particular approximately parallel to a body rear wall. Thus, for example, a drawer with a corresponding ejection device can be accommodated in a furniture body, without having to shorten the depth of the drawer appreciably. The achievable with the knee lever assembly 23 maximum driven ejection distance can correspond to a maximum of about the length, which show the two toggle leg 26, 27.

An alternative embodiment of the ejection device according to the invention with a bending lever 34 is explained in more detail with reference to FIGS 24 to 29, which show a perspective view obliquely from below on the bending lever 34, wherein to illustrate the bending lever 34 in Figure 25, 26 and 29, individual parts of the bending lever 34 are hidden. The bending lever 34 comprises two opposite flat housing parts 35a, 35b, which are fixedly positioned relative to one another via connecting pins 36a to 36c. In addition, the bending lever 34 has an elastic lever member 37 and a Supporting foot 15 with a rotatably received on the end roll 15a. The support foot 15 and the roller 15a serve to support the bending lever 34 on a guide track of a corresponding control element, in the manner as explained in more detail in FIGS. 10 and 11, for example.

The lever member 37 has at its front end a bent contact portion 37a, which can come into contact with the pivoting operation with a counter portion, for example with a drawer rear wall. The lever member 37 is bent at its opposite the bearing portion 37 a positioned end bent a piece and taken up between the housing parts 35 a, 35 b. At the bent end of the lever member 37, an angled tab 38 of the support foot 15 is supported (see Figures 25 and 26). If, in the case of an ejection process, the pivoted bending lever 34 now moves, for example, about a pivot axis which is e.g. coincides with the longitudinal axis of the connecting pin 36a, pivoted, the arrangement of the bending lever 34 shown in Figure 27 may result. In this case, the lever member 37 is elastically deformed under load, for example, by abutment against a drawer rear wall to be ejected. The support foot 15 is aligned approximately at right angles to the longitudinal edges of the housing parts 35a, 35b. The amount of bending of the lever member 37 depends on the force acting on the lever member 37 in the bending direction or on the mass to be moved upon ejection of the movable furniture part. FIG. 27 shows the bending of the lever element 37 during the ejection, for example, of a comparatively heavy furniture drawer (not shown).

In Figure 28, an overload protection of the bending lever 34 is active, in which the pivotally received between the housing parts 35a, 35b support 15 opposite the position according to Figure 27 is folded away. As a result, an effective support height, which is provided by the support foot 15, abruptly significantly reduced and reduces the load on the bending lever 34 and the lever member 37 effective force. For example, in the position according to FIG. 27, a support distance L1 between a support side of the roller 15a and an imaginary longitudinal axis of the housing parts 35a, 35b can be reduced to a supporting height L2 by folding away the support foot 15. This will also be reduced to the bending lever 34.

To understand the overload protection according to FIG. 28, the interaction between the tab 38 and the bent-over end of the lever element 37 is shown in FIG. 29 when the lever element 37 is shown in section and the housing part 35a is omitted. When a maximum load on the lever member 37 according to Figure 27 is exceeded, the support foot 15, which is set over the front end of its tab 38 on the bent end of the lever member 37, by resilient yielding of the bent end of the lever member 37 shown in FIG 27 in the overload position of the outrigger 15 as shown in FIGS 28 and 29 buckle, wherein the buckling by the pivotal mounting of the support foot 15 about the longitudinal axis of the connecting pin 36c (see Figure 24) is possible.

In FIGS. 30 to 32, the bending lever 34 as part of a highly schematically shown ejection device 6 (not to scale and omitting a drive unit) when installed in a furniture 1 or a rear wall 2a of a furniture body 2 in cooperation with a slidably received therein Drawer 3 shown. For better depiction of the relationships, a front end 3a of the drawer 3 is shown only in a lower part. The ejection device 6 is provided with a steering wheel 11 explained in greater detail above, in order to pivot the bending lever 34. In Figure 30, the ejection operation of the drawer 3 by means of the bending lever 34 is shown, wherein the drawer 3 is unloaded or slightly loaded and the lever member 37 is thereby not or almost not elastically deformed during ejection. The drawer 3 according to FIG. 30 is ejected in a forwardly driven manner according to arrow P2.

Figures 31 and 32 show a two-stage mechanism of action of the overload protection of the bending lever 34. For example, applied to the drawer 3 at the front ejection according to Figure 30 a predetermined force from the outside in the direction of the arrow P3, so that the drawer 3 in the direction P3 to the Furniture body is moved towards the lever element 37 can be bent back accordingly in a first stage of the overload protection and the drawer moves slightly into the body 2 (Figure 31) until the position of Figure 32 is achieved with the drawer closed 3, under triggered second stage The drawer 3 is now in a closed position relative to the furniture body 2. In the overload protection of the outrigger 15 can swing away so to speak from the guide rail of the steering wheel 11. In principle, the steering wheel 11 can then be turned into a position which corresponds to the closed position of the drawer 3, whereby the support foot 15 can again reach its approximately angled position or the lever element 37 is straight again, as shown in FIG.

FIGS. 34 and 34 a show a situation of an ejection operation of a heavy or heavily loaded drawer 3 by means of the bending lever 34 according to FIG. The heavy load is symbolized by a weight element in the drawer 3. The bending lever 34 and the lever member 37th Bends elastically to the rear under the comparatively heavy load of the drawer 3 to be ejected, which is particularly clear in Figure 34a, which shows an enlarged section of Figure 34.

FIG. 35 or FIG. 35a with an enlarged detail from FIG. 35 shows the effective overload protection in the heavily loaded drawer 3. In this case, an arrangement is established which is identical to the arrangement according to FIG. 32.

In Figure 36 and Figure 37 is a schematic representation of two different ejection devices 6 during the ejection process of a drawer 3 is shown in side view, wherein a drawer 3 receiving furniture body is not shown. The ejection devices 6 according to FIGS. 36 and 37 are shown in a highly schematized or not to scale. The ejection devices 6 are for example attachable to a rear wall of the furniture body.

At the drawer 3 is located on the rear wall 3b an elastically deformable part 40 of the ejection lever 7, wherein the elastic member 40 engages a rigid part 39 of the ejection lever 7. The ejection lever 7 is pivotable about a pivot axis S via a driven with a drive unit movable cam plate 42. Other parts, in particular the ejection device 6 such as the drive unit are not shown. During the driven rotation of the cam disk 42 about the eccentrically positioned rotation axis R, a roller 15a is supported on a support foot 15 of the rigid part 39 on a circumferential or closed guide track 42a, which is formed by a radially outer narrow side of the cam disk 42. By the rotation of the cam 42 here, for example, clockwise, the rigid part 39 of the ejection lever 7 and with this an elastic part 40 of the ejection lever 7 is pivoted. In this case, the elastic member 40 presses against the Rear wall 3b of the drawer 3, which is discharged thereby. By the permanent support of the support foot 15 on the roller 15 a on the rotating past it

Guide portion or the guide rail 42a of the cam 42, the pivoting movement of the ejection lever 7 can be determined. In particular, a uniform Verschwenkverlauf of the ejection lever 7 when pressing against the rear wall 3b and a comparatively fast pivoting back of the ejection lever 7 is realized after the actual ejection process. The guideway 42a may be formed in a variety of ways, e.g. as shown, consisting of two nearly straight sections which are connected to each other via two curved sections, wherein the axis of rotation R lies relatively far outside, close to a transition of a straight section into a curved section.

An alternative embodiment of an ejection lever in a position according to Figure 36 shows Figure 37, in which the ejection lever 7 is designed compared to the ejection lever of Figure 36 without elastic part and with an extension of the rigid part, wherein the discharge lever 7, a bend 41 is present. The transmission of a pivoting movement on the ejection lever 7 takes place in accordance with FIG. 36 via a cam disk 42. The bend 41 can be set up so that the bending angle formed by the bend 41 does not change significantly during the ejection process or can change elastically, for example, via a definable measure. LIST OF REFERENCE NUMBERS

1 furniture

2 carcass 2a rear wall 2b side wall 2c side wall

3 drawer 3a front end 3b rear wall

4 pull-out guide

5 front gap

6 ejection device

7 Ejector lever 7a Attachment side 8a Traverse

8b traverse

9a receiving flange

9b receiving flange

10 support pin

11 Steering wheel IIa Guideway IIb External toothing

12 base frame 13a electric motor 13b electric motor

14 gears

15 outrigger 15a roller

16 mounting bracket

17 bearing element

18 transmission element

19 transmission element

20 transmission element

21 rotation shaft 22a sensor part 2b Sensor part 3 Toggle lever assembly4 Toggle lever 5a Attachment jaw 5b Attachment jaw 6 Knee lever leg7 Knee lever leg8 Slide piece9 Take-up piece 0 Drive spindle1 Spacer 2a Spring 2b Spring 3a Traverse 3b Traverse 4 Bend lever 5a Housing part 5b Housing part βa Connecting pin6b Connecting pin6c Connecting pin7 Lever element 7a Bearing section8 Tab 9 rigid part 0 Elastic part1 Bend 2 Cam disc 2a guideway

Claims

claims

1. A device for ejecting a furniture part (3), which is movably received on a stationary furniture part (2), with a driven by a drive unit ejection lever

(7) which is attached to one of the two furniture parts and temporarily in contact with the other furniture part to eject the movable furniture part (3), and the ejection lever (7) has an abutment area (7a) within which the contact between the ejection lever (7) and the other furniture part, wherein the ejection lever (7) is drivable with the intention that during a ejection operation, the contact between the ejection lever (7) and the other furniture part is canceled, characterized in that the abutment area (7a) has a bend.

2. Device according to the preamble of claim 1, in particular according to claims 1, characterized in that the ejection lever (7, 34) is formed to deform elastically during the ejection process.

3. Device according to claim 1 or 2, characterized in that the ejection lever (7, 34) is designed such that a caused by the elastic deformation during the ejection process, position change of one end of an elastic part of the ejection lever (7, 34) in relation to the length of the elastic part of the ejection lever (34) is at least 2%, in particular 5%.

4. Device according to one of the preceding claims, characterized in that the ejection lever (7) is designed as a folding lever with a bend in the system area (7a) through which two substantially straight portions of the contact area are aligned at an angle to each other.

5. Device according to one of the preceding claims, characterized in that the ejection lever (7, 34) is a rigidly behaving during the ejection process behaving part (39) and an ejection during the elastically deforming part (37, 40), which in particular the contact area comprises.

6. Device according to one of the preceding claims, characterized in that the abutment region of the ejection lever is formed several times kinked.

7. Device according to one of the preceding claims, characterized in that a bend in the contact area is designed to be rigid, so that there is no change in the ejection process formed by the respective bending angle Abknickwinkels.

8. Device according to one of the preceding claims, characterized in that a bend in the contact area is formed under load elastically changeable.

9. Device according to the preamble of claim 1, in particular according to one of the preceding claims, characterized in that the ejection lever (24) is designed to allow in the manner of a toggle mechanism an ejection operation.

10. The device according to claim 9, characterized in that the ejection lever attached to one of the furniture parts toggle lever (24) with each other in a head portion bendable legs (26, 27), wherein during the ejection process, the head portion comes directly to the other furniture part to the plant.

11. The device according to claim 9 or 10, characterized in that an overload protection is provided for the toggle mechanism, by which an evasive movement of the ejection lever (24) against a movement necessary for the ejection operation is possible.

12. Furniture (1) with a movable furniture part (3) which is movably received on a stationary furniture part (2), wherein a device according to one of the preceding claims is provided.