EP2142045B1 - Piece of furniture and device for ejecting a furniture part - Google Patents

Description

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

A generic ejection device is off WO 2006/113947 A1 known.

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 with this example by a variable load each strongly different masses must be moved.

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 kink may describe a comparatively shallow kink angle, e.g. on the side facing away from the investment 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 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 as elastic deformation of the entire ejection lever or elastically behaving portions of the ejection lever, a desired self-adjustment of 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 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, a non-inventive ejection lever, which is in particular telescopic is explained. 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

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 ejector for ejecting the drawer with fully swung back ejector lever,

FIG. 8a to FIG. 8c

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

FIG. 8d and 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 a partial front view,

FIG. 9

a schematic perspective view of 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

a further perspective embodiment of a non-inventive ejection device omitting a front housing,

FIG. 13 to FIG. 15

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

FIG. 16 and FIG. 17

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

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

FIG. 19 to FIG. 23b

a further alternative ejection device according to the invention in different positions in a perspective view, in front or in top view,

FIG. 24 to FIG. 26

an ejection lever according to the invention in a perspective view and from the side with the omission of individual parts,

FIG. 27

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

FIGS. 28 and 29

the ejection lever according to FIG. 27 in an activated overload protection in side view in full view and with omission of parts or cut,

FIG. 30 to FIG. 33

a perspective obliquely from above shown furniture, which is partially cut away or shown with parts omitted with a highly schematic ejection device in three different furniture states,

Figure 34 Figure 34a

the furniture according to the view FIG. 31 and in an enlarged detail view in a loaded furniture condition,

Figure 35 Figure 35a

the furniture according to the view FIG. 32 and in an enlarged detail view in a further state of furniture and

FIG. 36 and FIG. 37

in each case a schematic diagram of different inventive ejection devices when ejecting a drawer in side view.

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, 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 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 in his 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 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 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 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 schematized with the Guideway 11a in 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 slightly smaller 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 it 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. About the roller 15a, the support foot 15 along the during the rotation of the steering wheel 11 spatially ramping and sloping guideway 11a 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 the Figures 10 and 11 is a front side covering housing part not shown, on which the pivotal mounting of the ejection lever 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.

As an overload protection, the direction of rotation of the steering wheel 11 can be reversed, for example when the resistance to the ejection movement or the ejection lever 7 has reached a particular predetermined resistance. 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.

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 ejector 6 with a discharge lever 7, which is located in a retracted 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 in FIG. 12 also only shown in a very schematic way.

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 transmission or transmission elements 18, 19 and 20 are provided with which a fixedly positioned on the ejection lever 7 rotary 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.

The FIGS. 13 to 15 show the ejector 6 from FIG. 12 with the front housing section schematically from above, wherein FIG. 13 shows the state of the ejection lever 7 in a rest position and a home position, and FIG. 14 respectively. FIG. 15 show different pivoting positions of the ejection lever 7 when ejecting a drawer, of which only part of a drawer rear wall RW is indicated by a dashed line.

In FIG. 13 the drawer rear wall lies 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 is a situation according to FIG. 14 achieved, whereas in particular the maximum pivoting state of the ejection lever 7 according to FIG. 15 the contact between the drawer rear wall RW and the ejection lever 7 is just canceled. The distance X _max according to FIG. 15 , between the position of the drawer rear wall RW in the position according to FIG. 13 and FIG. 15 , represents the driven ejection movement of the drawer. The subsequent movement of the drawer takes place without driving driven by running. In addition, after releasing the contact between the ejection lever 7 and the drawer rear wall of the ejection lever 7 back into its according to FIG. 13 pivoted back position shown. 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 can show, for example, a pivoting angle of about 80 to almost 90 degrees, in which case the pivoting angle shortly before lifting the contact between Ejector lever 7 and the drawer rear wall RW is about 70 degrees. The ejection device 6 according to the FIGS. 13 to 15 For example, it may be mounted 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.

Another highly schematic embodiment of an ejection lever 7 according to the invention show the FIGS. 16 and 17 , In addition, a drawer 3 and parts of a body 2 are shown in a highly schematic 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, the ejection lever 7 according to when the drawer is closed FIG. 16 be aligned over a portion of a drawer rear wall 3b parallel thereto without or without significant elastic deformation. FIG. 17 shows a pivoting position of the ejection lever 7, in which the drawer 3 has been moved a little way 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 inventive ejection lever 7, which is bent several times. The ejection lever 7 according to FIG. 18 For example, has three kinks, creating a polygonal safely extending range results on the ejection lever, with the drawer closed 3 partly spaced from the drawer rear wall 3b ejection lever 7. In this way, the rigid ejection lever 7 off FIG. 18 the advantages of the ejection lever according to FIGS. 16 and 17 to reach the 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 based on FIGS. 19 to 23b explained. In this case, a toggle mechanism is 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.

FIG. 19 shows the toggle 24 in its almost 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.

FIG. 20 shows the toggle lever 24 in the pivoted ejection position. This is due to the driven movement of the intermediate piece 31 from the in FIG. 19 shown position in the FIG. 20 shown position allows. 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 32 a, 32 b, the distance of the carriage piece 28 is reduced to the attachment jaw 25 a continuously, whereby the toggle lever 24 angled continuously stepless and a in FIG. 20 shown position 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 effect comes to the toggle lever 24 and the springs 32a, 32b only spring when there is an overload situation, for example, as follows explains.

For an overload protection of the toggle lever 24 and the toggle lever assembly 23 at articulated angled knee lever legs 26 and 27, for example, if a force in the direction of the arrow P1 (see FIG. 20 ) exceeds a threshold, the springs 32a, 32b, for example, resiliently formed or overcoming a certain spring force so compressible that the in FIG. 21 shown overload position of the toggle lever 24 is reached. The drive spindle 30 or the electric motor 13a remain so 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 FIG. 20 , that will 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 until possibly in its almost extended position according to FIG. 21 brought.

Figure 22a and Figure 22b show a front view and a top view of the toggle assembly 23 according to FIG FIG. 19 respectively. FIGS. 23a and 23b the corresponding views to the toggle lever assembly 23 according to FIG. 20 , especially the Figures 22b and 23b show the comparatively small depth dimensions of the toggle lever assembly 23 transverse to the longitudinal extent of the toggle assembly 23. This allows a very compact or space-saving accommodation of the toggle assembly 23 in a piece of furniture, especially 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 based on the FIGS. 24 to 29 explained in more detail, which show a perspective view obliquely from below on the bending lever 34, wherein for illustrating the bending lever 34 in FIG. 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 15 a serve to support the bending lever 34 on a guide track of a corresponding control, in the manner, as for example in the Figures 10 and 11 is explained in more detail.

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 FIGS. 25 and 26 ). If now in an ejection operation of the driven pivotable bending lever 34, for example, about a pivot axis, which coincides, for example, with the longitudinal axis of the connecting pin 36a pivots, the in FIG. 27 shown arrangement of the bending lever 34 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 member 37 when ejecting, for example, a relatively heavy furniture drawer (not shown).

In FIG. 28 is an overload protection of the bending lever 34 is active, in which the pivotally received between the housing parts 35a, 35b support 15 opposite according to the position FIG. 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 are reduced by the folding away of the support foot 15 to a supporting height L2. This will also be reduced to the bending lever 34.

To understand the overload protection according to FIG. 28 is in FIG. 29 shown at Schnittem illustrated lever member 37 and omitting the housing part 35a, the interaction between the tab 38 and the bent end of the lever member 37. When exceeding a maximum load on the lever member 37 according to FIG. 27 can the support foot 15, which is set over the front end of its tab 38 on the bent end of the lever member 37 supporting, by elastic yielding of the bent end of the lever member 37 in accordance FIG. 27 in the overload position of the outrigger 15 according to FIGS. 28 and 29 kinking, wherein the buckling by the pivotal mounting of the support foot 15 about the longitudinal axis of the connecting pin 36 c (see FIG. 24 ) is possible.

In the FIGS. 30 to 32 the bending lever 34 is shown as part of a highly schematically shown ejection device 6 (not to scale and in particular omitting a drive unit) in the installed state in a piece of furniture 1 or a rear wall 2a of a furniture body 2 in cooperation with a drawer 3 slidably received therein. 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 FIG. 30 the discharge 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 driven forward according to arrow P2.

The FIGS. 31 and 32 show a two-stage mechanism of action of the overload protection of the bending lever 34. For example, the drawer 3 at the front ejection according to FIG. 30 a predetermined force applied from the outside in the direction of the arrow P3, so that the drawer 3 is moved towards the furniture body in the direction P3, the lever member 37 can be bent back in a first stage of the overload protection and the drawer moves slightly into the body 2 ( FIG. 31 ), until the position off FIG. 32 is achieved with closed drawer 3, under triggered second stage of the overload protection with weggeknickteem in addition to the bent lever member 37 Stützfuß 15. The drawer 3 is now in a closed position relative to the furniture body 2. In the overload protection of the outrigger 15 can be said of the guideway of the Swing steering wheel 11 away. Basically, the steering wheel 11 can then be rotated into a position corresponding to the closed position of the drawer 3, whereby the support foot 15 can return to its approximately angled position at right angles or the lever member 37 is straight again, which FIG. 33 shows.

In FIG. 34 34a is a situation of discharging a heavy loaded drawer 3 by means of the bending lever 34, respectively FIG. 30 shown. 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 relatively heavy load of the drawer 3 to be ejected, which is particularly in Figure 34a becomes clear, which made an enlarged section FIG. 34 shows.

FIG. 35 respectively. Figure 35a with an enlarged section FIG. 35 shows the effective overload protection in the heavily loaded drawer 3. This adjusts an arrangement that is identical to the arrangement according to FIG. 32 ,

In FIG. 36 and FIG. 37 is ever a schematic diagram of two different ejector 6 during the ejection process of a drawer 3 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. As a result of the permanent support of the support foot 15 via the roller 15a on the guide section or guide track 42a of the cam disc 42, which is guided past it in rotation, 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, eg, as shown, consisting of two nearly straight sections joined together by two curved sections, the rotation axis R being located relatively far outwardly near a transition of a straight section into a curved section.

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

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

transmission element

19

transmission element

20

transmission element

21

rotary shaft

22a

sensor part

22b

sensor part

23

Toggle arrangement

24

toggle

25a

Anbringbacke

25b

Anbringbacke

26

Toggle leg

27

Toggle leg

28

carriage component

29

spigot

30

drive spindle

31

connecting piece

32a

feather

32b

feather

33a

traverse

33b

traverse

34

bending lever

35a

housing part

35b

housing part

36a

connecting pin

36b

connecting pin

36c

connecting pin

37

lever member

37a

contact section

38

flap

39

rigid part

40

elastic part

41

kinking

42

cam

42a

guideway

Claims (12)

1. Device for pushing out a furniture part (3) which is accommodated in a movable manner on a fixed furniture part (2), comprising a pushing-out lever (7) drivable by a drive unit and being fitted on one of the two furniture parts and in temporary contact with the other furniture part in order to push out the movable furniture part (3), and the pushing-out lever (7) having an abutment region (7a) within which the contact between the pushing-out lever (7) and the other furniture part takes place, wherein the pushing-out lever (7) can be driven, with the intention that during a pushing-out operation the contact between the pushing-out lever (7) and the other furniture part is eliminated, characterised in that the abutment region (7a) has a bend.
2. Device according to the preamble of claim 1, in particular according to claim 1, characterised in that the pushing-out lever (7, 34) is designed to deform elastically during the pushing-out operation.
3. Device according to either claim 1 or claim 2, characterised in that the pushing-out lever (7, 34) is designed such that a change in position of one end of an elastic part of the pushing-out lever (7, 34) brought about by the elastic deformation during the pushing-out operation is at least 2%, in particular 5 %, in relation to the length of the elastic part of the pushing-out lever (34).
4. Device according to any one of the preceding claims, characterised in that the pushing-out lever (7) is designed as an angled lever with a bend in the abutment region (7a), by means of which two essentially rectilinear sections of the abutment region are oriented at an angle to one another.
5. Device according to any one of the preceding claims, characterised in that the pushing-out lever (7, 34) has a part (39) which behaves essentially rigidly during the pushing-out operation and a part (37, 40) which deforms elastically during the pushing-out operation, said part comprising in particular the abutment region.
6. Device according to any one of the preceding claims, characterised in that the abutment region of the pushing-out lever is designed to have multiple bends.
7. Device according to any one of the preceding claims, characterised in that a bend is designed to be rigid in the abutment region, so that there is no change during the pushing-out operation in an angle of inflection formed by the relevant bend.
8. Device according to any one of the preceding claims, characterised in that a bend in the abutment region is designed such that it can be varied elastically under load.
9. Device according to the preamble of claim 1, in particular according to any one of the preceding claims, characterised in that the pushing-out lever (24) is designed in order to allow a pushing-out operation in the manner of a toggle mechanism.
10. Device according to claim 9, characterised in that the pushing-out lever comprises a toggle (24) which is fitted onto one of the furniture parts and has limbs (26, 27) which are angled in relation to one another in a head section, the head section coming into direct abutment against the other furniture part during the pushing-out operation.
11. Device according to either claim 9 or claim 10, characterised in that an overload-prevention mechanism is provided for the toggle mechanism to allow the pushing-out lever (24) to yield counter to a movement which is necessary for the pushing-out operation.
12. Piece of furniture (1) with a movable furniture part (3) which is accommodated in a movable manner on a fixed furniture part (2), comprising a device according to any one of the preceding claims.

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