Abstract
An arrangement includes a first drive device for moving a movable furniture part, a second drive device for moving the same movable furniture part, and a synchronization device for synchronizing the two drive devices. The two drive devices can assume different positions during the movement of the movable furniture part. The arrangement also includes a correction device, by which both drive devices can be brought into the same position.
Claims
1. An arrangement comprising: a first drive device configured to move a moveable furniture part, the moveable furniture part not forming part of the arrangement, a second drive device configured to move the moveable furniture part, the two drive devices being configured to assume different positions during movement of the moveable furniture part, a synchronizing device for synchronizing the two drive devices, and a correction device for bringing the two drive devices into a same position, wherein the synchronizing device comprises a synchronizing rod with a first rod member and a second rod member rotatable relative to the first rod member, wherein the first and second rod members also form parts of the correction device, and wherein the first rod member is insertable into the second rod member, and a holding torque between the first and second rod members remains substantially constant independent of an insertion depth of the first rod member in the second rod member.
2. The arrangement according to claim 1, wherein the different positions of the first and second drive devices comprise a position in a tensioning section, a position in a locking section, a position in an over-pressing section, and a position in an ejecting section.
3. The arrangement according to claim 1, wherein the first and second drive devices can be brought into the same position by the correction device during the movement of the moveable furniture part.
4. The arrangement according to claim 1, wherein the correction device is part of the synchronizing device.
5. The arrangement according to claim 1, wherein the first and second rod members have a first operating position relative to each other, in which a predetermined holding torque is generated between the first and second rod members.
6. The arrangement according to claim 5, wherein the first and second rod members have a second operating position relative to each other, which second operating position is rotated in comparison to the first operating position, wherein in the second operating position the holding torque between the first and second rod members is substantially as large as the holding torque in the first operating position.
7. The arrangement according to claim 1, wherein the synchronizing device further comprises a first coupling element for connecting the synchronizing device with the first drive device, and a second coupling element for connecting the synchronizing device with the second drive device, wherein the first and second coupling elements are motion-transmitting connected by the synchronizing rod.
8. The arrangement according to claim 7, wherein the first and second coupling elements are moveable to a limited extent by a limit-stop.
9. The arrangement according to claim 8, wherein the limit-stop is formed yieldingly, wherein a rotary movement between the first rod member and the second rod member is carried out when the force between the first and second rod members is smaller than the force which the limit-stop opposes to a movement of one of the coupling elements, the force being a holding torque.
10. The arrangement according to claim 8, wherein the limit-stop is formed yieldingly on an elastic arm.
11. The arrangement according to claim 1, wherein the first and second drive devices each comprise a lockable ejection device for ejecting the moveable furniture part from a closed position into an open position and a locking device for locking the ejection device in a locking position, wherein the ejection device is unlockable from the locking position by an over-pressing movement of the moveable furniture part into an over-pressing position situated behind the closed position.
12. The arrangement according to claim 1, wherein the drive devices are substantially mirror-symmetrical to each other.
13. An item of furniture comprising: a furniture carcass, a moveable furniture part being moveable on the furniture carcass, and the arrangement according to claim 1.
14. The item of furniture according to claim 13, wherein the first and second drive devices of the arrangement are arranged on opposite sides of the moveable furniture part.
15. The item of furniture according to claim 13, wherein the first and second drive devices are mounted to the moveable furniture part or to a drawer rail.
16. An arrangement comprising: a first drive device configured to move a moveable furniture part, the moveable furniture part not forming part of the arrangement, a second drive device configured to move the moveable furniture part, the two drive devices being configured to assume different positions during movement of the moveable furniture part, a synchronizing device for synchronizing the two drive devices, and a correction device for bringing the two drive devices into a same position, wherein the synchronizing device comprises a synchronizing rod with a first rod member and a second rod member rotatable relative to the first rod member, and the synchronizing device further comprises a first coupling element for connecting the synchronizing device with the first drive device, and a second coupling element for connecting the synchronizing device with the second drive device, wherein the first and second coupling elements are motion-transmitting connected by the synchronizing rod, wherein the first and second coupling elements and the synchronizing rod each are motion-transmitting interconnected by a gear rack formed on each of the first and second coupling elements and by a gear wheel being part of the synchronizing rod.
17. An arrangement comprising: a first drive device configured to move a moveable furniture part, the moveable furniture part not forming part of the arrangement, a second drive device configured to move the moveable furniture part, the two drive devices being configured to assume different positions during movement of the moveable furniture part, a synchronizing device for synchronizing the two drive devices, and a correction device for bringing the two drive devices into a same position, wherein the synchronizing device comprises a synchronizing rod with a first rod member and a second rod member rotatable relative to the first rod member, and the synchronizing device further comprises a first coupling element for connecting the synchronizing device with the first drive device, and a second coupling element for connecting the synchronizing device with the second drive device, wherein the first and second coupling elements are motion-transmitting connected by the synchronizing rod, wherein the first and second coupling elements are moveable to a limited extent by a limit-stop, and wherein, in the case of the first coupling element abutting the limit-stop and simultaneous movement of the second coupling element, the rod members of the synchronizing device prevent a movement transmission from the second coupling element to the first coupling element by rotation of the first and second rod members to each other.
18. An arrangement comprising: a first drive device configured to move a moveable furniture part, the moveable furniture part not forming part of the arrangement, a second drive device configured to move the moveable furniture part, the two drive devices being configured to assume different positions during movement of the moveable furniture part, a synchronizing device for synchronizing the two drive devices, and a correction device for bringing the two drive devices into a same position, wherein the synchronizing device comprises a synchronizing rod with a first rod member and a second rod member rotatable relative to the first rod member, and the synchronizing device further comprises a first coupling element for connecting the synchronizing device with the first drive device, and a second coupling element for connecting the synchronizing device with the second drive device, wherein the first and second coupling elements are motion-transmitting connected by the synchronizing rod, wherein the first and second coupling elements are moveable to a limited extent by a limit-stop, and wherein the first and second coupling elements, the limit-stops for the first and second coupling elements, and the first and second rod members rotatable to each other collectively from the correction device.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) Further details and advantages of the present invention are described more fully hereinafter by the specific description made with reference to the examples illustrated in the drawings, in which:
(2) FIG. 1 shows an item of furniture with a moveable furniture part together with the drive devices and a synchronizing device in a partly in a partly broken-away perspective,
(3) FIG. 2 is an exploded view of a drive device,
(4) FIG. 3 is a perspective view of the assembled drive device,
(5) FIG. 4 shows parts of a synchronizing device,
(6) FIG. 5 is a partly exploded view of the arrangement with two drive devices and the synchronizing device,
(7) FIG. 6 shows the assembled arrangement,
(8) FIG. 7 shows an alternative variant of the synchronizing device,
(9) FIGS. 8 to 18 are plan views of the movements of an arrangement,
(10) FIG. 19 is an exploded view of an alternative configuration of the arrangement,
(11) FIGS. 20A to 23B are a plan view and a perspective view of the movements of the arrangement shown in FIG. 19,
(12) FIGS. 24 to 27 show the erroneous motion sequence of an arrangement without a correction device,
(13) FIGS. 28A to 35C show various perspectives and sections of components of an embodiment of a synchronizing device according to the invention, and
(14) FIGS. 36 to 40 show the motion sequence of an arrangement corrected by the correction device.
DETAILED DESCRIPTION OF THE DRAWINGS
(15) An arrangement 1 is described in the FIGS. 1 to 23B which is disclosed in the not pre-published AT 514 865. Also a preferred embodiment of the present invention is structurally identical from the basic construction. Differences are particularly given in the section of the synchronizing device 6, which differences are elucidated in drawings starting from FIG. 24 following later.
(16) FIG. 1 shows an article of furniture 18 comprising a furniture carcass 19 and a furniture part 3 which is moveable relative thereto in the form of a drawer, as a partly broken-away perspective view. This drawer is mounted moveably to the furniture carcass 19 by way of an extension guide 36. Mounted at the underside of the moveable furniture part 3 is an arrangement 1 which has two drive devices 2 (see particularly FIG. 5) and 7 which are fixed laterally to the drawer bottom 63 and to a drawer rail 64 respectively, and a synchronizing device 6.
(17) FIG. 2 shows an exploded view of the essential components of the arrangement 1 together with the first drive device 2. The first drive device 2 is mounted to the moveable furniture part 3 by way of the housing 8. The ejection force storage members 10 which are in the form of tension springs are held on the one hand to the housing 8 and on the other hand to the ejection slider 9. The ejection slider 9 is displaceable along the guide track 32 in the housing 8. The housing 8, the ejection force storage members 10, the ejection slider 9 and the control lever 23 together form the essential components of the first ejection device 4. In addition however the transmission element 20 can also be associated with the first ejection device. The transmission element 20 bears by way of the transmission abutment 25 against the abutment 33 on the control lever 23. The transmission element 20 is displaceable along the control track 24 in the housing 8. That control track 24 has an angled end section 34. As soon as the catch lever 22 hingedly connected to the transmission element 20 passes into that angled end section 34 the catch lever 22 pivots whereby the drive device 2 is released from the entrainment member 21 which is fixed with respect to the furniture carcass. When conversely the catch lever 22 leaves that angled end section 34 the entrainment member 21 is caught or held between the catch lever 22 and the transmission element 20. In addition, the coupling element 16 of the synchronizing device 6 is mounted rotatably about the axis of rotation D on the housing 8. Also provided in one piece with that coupling element 16 is the locking element 12 which jointly with the latching element 11 disposed on the control lever 23 forms the locking device 5 for the first ejection device 4. In addition, the Figure shows the cardioidal sliding track 13 which is provided in the housing 8 and which has the tensioning section S, the pressing-through section DR, the locking section V, the over-pressing section and the ejection section A. The locking section V is additionally also formed by the locking element 12.
(18) FIG. 3 shows the arrangement 1 in the assembled condition. The ejection force storages members 10 are stressed and the latching element 11 is disposed in the locking section V whereby the first ejection device 4 is in the locking position VS. As the entrainment member 21 is caught by the catch lever 22, the moveable furniture part 3 is in the closed position SS.
(19) An example of components of a synchronizing device 6which is not constructed according to the inventionis shown in FIG. 4. In this case, the gear racks 27 and the gear wheel 28 are mounted moveably to the base plate 26. FIG. 5 shows the individual components of the arrangement 1 in a condition of not yet being entirely assembled as the connection by way of the synchronizing rods 17 has not yet been made. This, however, is shown in FIG. 6 whereby the synchronizing rods 17 are respectively rotationally hingedly connected on the one hand to the coupling elements 16 and on the other hand to the gear racks 27.
(20) FIG. 7 shows a configuration of the synchronizing device 6, which is an alternative to FIG. 6, wherein the synchronizing rods 17 are positively guided linearly against each other by way of slot connections.
(21) For FIGS. 8 to 23B, the basic motion sequence of the drive devices 2 and 7 and the synchronizing device 6 is elucidated in the following. Although the shown components with the reference signs 17, 26, 27 and 28 are not constructed according to the invention, the described function sequence takes effect analogously also for a preferred embodiment of the arrangement 1 according to the invention.
(22) FIG. 8 shows a plan view of the arrangement 1 with the first drive device 2, the second drive device 7 and the synchronizing device 6. It is possible to see from the detail sections shown at left and right that in each case the latching element 11 is in the locking section V of the cardioidal sliding track 13. In this situation, the latching element 11 bears against the locking surface 14 of the locking element 12. That locking surface 14 is oriented tangentially relative to the direction of rotation of the axis of rotation D. As therefore the force of the ejection force storage members 10 that is acting on the latching element 11 cannot trigger a rotary movement of the coupling element 16, the ejection devices 4 respectively remain in their locking position VS. The moveable furniture part 3 is disposed in the closed position SS.
(23) If now starting from FIG. 8 a pressure is applied at one side in the closing direction SR to the left-hand region of the moveable furniture part 3 the latching element 11 of the first drive device 2 is moved into the overpressing section as the housing 8 moves in the closing direction relative to the control lever 23, the transmission element 20 and the entrainment member 21 (see FIG. 9). In that case, the latching element 11 is moved by the inclined deflection section 35 from the locking section V into the over-pressing section . That over-pressing movement begins free from a movement transmission between the first drive device 2 and the synchronizing device 6. The second drive device 7 thus remains uninfluenced by that over-pressing movement on the left-hand side. As a result the over-pressing movement is only performed against the force of the ejection force storage member 10 of an ejection device 4. The moveable furniture part is thus disposedat least at one sidein the over-pressing position S.
(24) As soon as the moveable furniture part 3 is released, the ejection force storage members 10 of the first ejection device 4 can be relieved of stress. As a result, the housing 8 together with the moveable furniture part 3 fixed thereto is ejected relative to the entrainment member 21 in the opening direction OR (see FIG. 10) whereby the latching element 11 also passes into the ejection section A of the cardioidal sliding track 13. The first ejection device 4 therefore actually thrusts against the furniture carcass 19, more specifically the entrainment member 21. Up until then there has not been any transmission of movement to the synchronizing device 6. As shown in FIG. 10 however the latching element 11 already bears against the synchronizing surface 15 of the locking element 12. That synchronizing surface 15 is oriented radially relative to the axes of rotation D of the coupling elements 16a and 16b.
(25) By virtue of that orientation of the synchronizing surface 15, finallywhen the ejection force storage member 10 moves the latching element 11 further through the ejection section A in the opening direction into the position shown in FIG. 11the transmission of movement from the first drive device 2 to the synchronizing device 6 and further to the second drive device 7 takes place. By virtue of the synchronizing effect the locking element 12 of the second drive device 7 is pivoted whereby the latching element 11 is no longer locked at the locking surface 14 thereof. Thus that latching element 11 passes directly from the locking section V into the ejection section A. Therefore the ejection force storage member 10 of the second ejection device 4 can also be relieved of stress and the moveable furniture part 3 is ejected synchronously into an open position OS by both ejection devices 4.
(26) After further rotation of the two coupling elements 16a and 16b into the position shown in FIG. 12 the latching element 11 and the locking element 12 no longer bear against each other. The ejection force storage members 10 of both ejection devices 4 can be further relieved of stress. In comparison with FIG. 10, it is also possible to clearly see that the coupling element 16a and 16b have rotated through about 50 about the axes of rotation D. Preferably, that rotary movement is limited on the one hand by the locking element 12 coming into abutment against the housing 8 and on the other hand by the slightly elastic spring element 30 also coming into abutment against the housing 8. In general, depending on the respective design configuration, that rotary range can be between 30 and 90. The relatively wide range of rotary movement gives the advantage that in particular the total clearance of the synchronizing device 6 has scarcely any influence on synchronization.
(27) Finally, as shown in FIG. 13, both ejection force storage members 10 are fully relieved of stress and the ejection operation is concluded.
(28) Then, due to momentum or by actively pulling on the moveable furniture part 3, the drive devices 2 and 7 pass into the position shown in FIG. 14. In that situation, the control lever 23 and the transmission element 20 are no longer in contact. The catch lever 22, however, is in the angled end section 34 of the control track 24 whereby the entrainment member 21 is released. The moveable furniture part 3 is thus freely moveable.
(29) The closing process for the moveable furniture part 3 is shown as from FIG. 15. Here, the entrainment member 21 is caught again and by way of the transmission element 20, the control lever 23 and with same the latching element 11 are in the tensioning section S whereby the ejection force storage members 10 are manually tensioned upon closure.
(30) In that closing and stressing movement, both latching elements 11 as shown in FIG. 16 also come into abutting relationship with the return levers 29 of the coupling elements 16. In that way the coupling elements 16a and 16b are rotated about the axes of rotation D so that as shown in FIG. 17 the locking elements 12 also move closer and closer in the direction of the locking section V.
(31) In FIG. 18, finally the coupling elements 16a and 16b are again in their starting position so that the locking surfaces 14 of the locking elements 12 again serve for locking the latching elements 11. The slightly elastic elements 30 of the coupling elements 16 provide for correct positioning (neutral position) of the locking elements 12 so that the locking elements 12 also form the latching depression or the locking section V. The locking position VS of the ejection devices 4 is again reached with the ejection force storage members 10 in a stressed condition. The moveable furniture part 3 is again in the closed position SS. To guarantee that the coupling elements 16a and 16b remain in their positionafter the latching element 11 is no longer in contact with the return lever 29 and before the latching element 11 again bears against the locking element 12small latching noses can be provided in the housing 8, the noses cooperating with the coupling element 16a and 16b, preferably with their locking elements 12.
(32) FIG. 19 shows an exploded view of an alternative embodiment of the synchronizing device 6. In accordance therewith, the gear rack 27 is provided directly on the coupling element 16. Fixed to the housing 8 is a holder 31 to which the synchronizing rod 17 is rotatably mounted together with a gear wheel 28 at the end thereof. The gear wheel 28 meshes with the gear rack 27 so that a rotary movement of the coupling element 16 is transmitted into a rotary movement of the synchronizing rod 17and vice-versa. The remaining components of the arrangement 1 in FIG. 19 are identical to the first embodiment.
(33) FIGS. 20A through 23B again showmatching with FIG. 19the most important positions involved in the motion sequences of the drive device 2 and 7 respectively and the synchronizing device 6. The rotary movement of the synchronizing rod 17 is most clearly shown in FIG. 23B.
(34) In the FIGS. 24 to 27, a problem is explained in detail which sometimes occurred with previous arrangements 1 with two drive devices 2 and 7 and a synchronizing device 6.
(35) By an incorrect operation or by mounting drive devices 2 and 7 located in positions different from each other it could have occurred thatas for example illustrated in FIG. 24the first drive device 2 assumes a position at the beginning of the tensioning section S whereas the second drive device 7 assumes a position at the end of the locking section V. Put in other words the two drive devices 2 and 7 are located in different positions. The respective positions can be best seen by means of the position of the respective latching element 11 in the cardioidal sliding track 13. In concrete, the latching element 11 of the first drive device 2 is at the end of the ejection section A which at the same time forms the beginning of the tensioning section S (see detail bottom left). The latching element 11 of the second drive device 7 is at the end of the locking section V (see detail bottom right), thus, in the latching recess of the cardioidal sliding track 13).
(36) If now pressing onto the still opened moveable furniture part 3 starting from this false position, so in the drive device 2 the transmission element 20 and with this transmission element 20 the control lever 23 together with the latching element 11 is moved relative to the housing 8 because auf the fixed entrainment member 21. As a result the position according to FIG. 25 is reached. Here, the latching element 11 has already travelled a part of the tensioning section S. The latching element 11 and its control lever 23 respectively are thus already bearing against the first coupling element 16a (see especially the detail section bottom left). The latching element 11 of the second drive device 7 is still located in the latching recess of the locking section V (see especially the detail section bottom right).
(37) As soon as in a case of a further movement in closing direction SR the first coupling element 16a of the first drive device 2 begins to rotate due to the moving control lever 23, a movement transmission to the second coupling element 16b of the second drive device 7 is carried out by the synchronizing device 6, wherein the second coupling element 16b is thus rotated clockwise. This also induces a movement of the locking element 12 formed in one piece with the second coupling element 16b, whereby the latching recess is opened and the locking position VS is unset. As a result, the ejection force storage member 10 of the second drive device 7 can relax and thereby moves the ejection slider 9 through the ejection section A. Hence, the second drive 7 is locatedas shown in FIG. 26in a position at the end of the ejection section A while the first drive device 2 is located in a position at the beginning of the locking section V.
(38) In FIG. 27 the latching element 11 of the first drive device 2 has finally reached the end of the locking section V.
(39) This undesired false synchronization is corrected by the present invention, wherein this is explained in the following by reference to the preferred embodiment according to the FIGS. 28 to 40.
(40) In FIGS. 28A-28B, the components of the synchronizing device 6 are exemplified. Especially, the first rod member 17a can be seen which is inserted into the third, profile-shaped or extrusion-pressed rod member 17c.
(41) As follows from FIGS. 29A-29B, the two rod members 17a and 17c together with the second rod member 17b form the synchronizing rod 17. At the other end of the third rod member 17c two further and structurally identical rod members 17a and 17b are provided. The synchronizing rod 17 together with the coupling elements 16a and 16b forms the synchronizing device 6. In the larger displayed FIG. 29B the gear rack 27 formed on the first coupling element 16a and the gear wheel 28 formed on the second rod member 17b can be seen.
(42) In the assembled state according to FIGS. 30A and 30B, the gear rack 27 and the gear wheel 28 are meshing. The first rod member 17a is inserted via its anterior portion into the second rod member 17b.
(43) In FIG. 31A, the synchronizing device 6 is attached to the first drive device 2. The inscribed cross-section i-i is shown in FIG. 31B. FIG. 31C shows a detail of FIG. 31B. From this cross-section it can be recognized that the first rod member 17a is fixed or inserted exactly fitting and thus frictionally engaged in the third rod member 17c. In the same manner, the first rod member 17a is also inserted in the second rod member 17b. In that situation the frictional engagement is reached by means of the contact surface 37. At the same time, however, a clearance 39 partially remains between the first rod member 17a and the second rod member 17b. The housing 8 of the first drive device 2 can also be seen to some extent in FIG. 31C, which housing 8 is mounted by means of the mounting plate 38 to a moveable furniture part 3 which is not shown. On the housing 8, in turn, the first coupling element 16a is rotationally mounted which meshes by means of the gear rack 27 with the gear wheel 28 of the second rod member 17b. The holder 31 is attached to the housing 8 and forms a pivot bearing for the synchronizing rod 17.
(44) In FIG. 32A the cross-section ii-ii is inscribed which is shown in FIG. 32B. FIG. 32C shows a detail of FIG. 32B wherein it can be recognized that the anterior part of the first rod member 17a in the cross-section is formed quadrangular with rounded corners. In the cross-section the second rod member 17b comprises three convex parts 42. Thereby, the first rod member 17a does not bear against the second rod member 17b in the full circumference. Rather, this results in the clearances 39 next to the contact surfaces 37. The dot-dashed inscribed cross-section in that situation substantially corresponds to the cross-section i-i which is shown in FIG. 31C and also exemplifies the contact surface 37 and the clearance 39. In this FIG. 32C the rod members 17a and 17b have a first operating position B1 to each other. In this first operating position B1 a predetermined holding torque H is given between the rod members 17a and 17b due to the friction in the area of the contact surfaces 37.
(45) In FIG. 33A, the cross-section iii-iii is inscribed which is shown in FIG. 33B. FIG. 33C shows a detail of FIG. 33B wherein the first rod member 17a and the second rod member 17b together form the correction device 50 as the first rod member 17a can be rotated to the second rod member 17b. In concrete in FIG. 33C the first rod member 17a has rotated to the second rod member 17b compared to FIG. 32C (exemplified by the differently oriented hatching). This means the first rod member 17a has overcome the holding torque H in the area of the contact surfaces 37 and has rotated (in this case about 90) relative to the second rod member 17b into the second operating position B2. In this second operating position B2 the holding torque H in the area of the contact surfaces 37 is again as large as in the first operating position B1.
(46) Also, in a comparison of the FIGS. 32D and 33D, the different operating positions B1 and B2 of the synchronizing device 6 are demonstrated. In particular, the inscribed markings M exemplify the relative rotary movement between the first rod member 17a and the second rod member 17b. The amount of the rotation is per se arbitrary as long as a false position is compensated thereby and also in the second operating position B2 approximately the same holding torque H is again given.
(47) With reference to FIGS. 34C and 35C, it is initially noted that in the furniture industry plate thicknesses of 16 mm and 19 mm are the most common for wood and particle boards for the furniture construction. To be able to equip furniture items with these different plate thicknesses with structurally identical arrangements 1, mostly a length adaptation of the synchronizing rods 17 is carried out. However, to be able to guarantee the same functionality of the correction device 50 also in the case of differently long synchronizing rods 17, it is preferably provided that the holding torque H between the rod members 17a and 17bindependent of an insertion depth of the first rod member 17a in the second rod member 17bremains substantially equal. Appropriately in FIGS. 34C and 34A a smaller insertion depth is illustrated (corresponding to a plate thickness of 16 mm). In this case the anterior part of the first rod member 17a is arranged in the bracket 40 in which the second rod member 17b is less rigid than in the area of the recesses 42. Thereby, the whole contact surface 37 between the rod members 17a and 17b is relatively large; however, a relative small rigidity of the brackets 40 is given. Thus, the elasticity and the size of the contact surfaces 37 cooperatively result in the holding torque H. In contrast, in the FIGS. 35C and 35B the first rod member 17a is inserted deeper into the second rod member 17b (corresponding for a plate thickness of 19 mm). In this case the size of the contact surfaces 37 is smaller because of the recesses 42. By the higher rigidity of the second rod member 17b in area near the gear wheel, in total, however, there is again the same holding torque H as in the case of a smaller insertion depth. In the case of different insertion depths and in the case of constant rigidity of the involved components a constant holding torque H can be guaranteed by the same size of the contact surfaces 37 alone. This is exemplified in a comparison between the FIGS. 34B and 35B.
(48) With reference to the FIGS. 36 to 40 the motion sequence and the functional principle respectively of the arrangement 1 with a correction device 50 according to the invention are explained in the following.
(49) In FIG. 36, the same initial position of the arrangement 1 as in FIG. 24 is given, only that in this case in an inverted manner the second drive device 7 is located in a position at the beginning of the tensioning section S, while the first drive device 2 is located in a position at the end of the locking section V.
(50) If now pressing onto the opened furniture part 3 in closing direction SR starting from this position, so in the second drive device 7 the control lever 23 together with the latching element 11 movesby the entrainment member 21 and the transmission element 20along the tensioning section S. Thereby, the control lever 23 reaches contact with the second coupling element 16b as can be best seen in FIG. 37A bottom right. Already in this FIG. 37A it can be recognized that both drive devices 2 and 7 each comprise an elastic arm 44.
(51) In detail, it follows from FIG. 37B that the plays of the individual components are adjusted to each other in such a way that a small gap remains between the coupling elements 16a and 16b and the limit-stop 43 formed by the elastic arm 44 when the locking element 12 is in the locking position. By its rigidity (spring rate) the elastic arm 44 by means of the limit-stop 43 opposes a certain force K to a corresponding movement of the respective coupling elements 16a and 16b respectively.
(52) As soon as starting from the FIG. 37A the moveable furniture part 3 is further moved in closing direction SR, so the second coupling element 16b of the second drive device 7 starts to rotate clockwise (see FIG. 38). This movement is transmitted by means of the gear rack 27 and the gear wheel 28 to the synchronizing rod 17. As a result the first coupling element 16a moves counter-clockwise by means of the left-sided gear wheel 28 and the corresponding gear rack 27 until this first coupling element 16a bears against the limit-stop 43. In the case of a continued movement of the second coupling element 16b actuated by pressing, the correction device 50 is triggered in that a rotary movement between the first rod member 17a and the second rod member 17b is carried out as the forcein form of the holding torque Hbetween the two rod members 17a and 17b is smaller than the force K which the limit-stop 43 (or the elasticity of the elastic arm 44) opposes to a movement of the first coupling element 16a. In other words, the first coupling 16a is prevented from a further movement counter-clockwise by the limit-stop 43. As a result also the left-sided gear rack 27 is not moved further and the gear wheel 28 of the left-sided second rod member 17b is also no longer rotated. As the left-sided first rod member 17a however still receives a rotational momentum by the second coupling element 16b, the holding torque H between the two rod members 17a and 17b is overcome and the rod members 17a and 17b are rotating relative to each other from the first operating position B1 into the second operating position B2. In FIG. 38 the second drive device 7 has already reached the beginning of the locking section V, starting from where the contact between the control lever 23 and the second coupling element 16b has again ended. In FIG. 38 it is exemplified that the limit-stop 43, the first coupling element 16a, the first rod member 17a, and the second rod member 17b (together with the forces K and H acting in between) form the correction device 50. In the same manner also the structurally identical components on the other side form a correction device 50.
(53) In FIG. 39 both drive devices 2 and 7 have finally reached the same position in which the respective latching element is located at the end of the locking section V.
(54) FIG. 40 shows yet a subsequent synchronized unlocking and over-pressing movement whereby in this case both latching elements 11 reach the over-pressing section of the cardioidal sliding track 13.
(55) Conclusively it is quoted that the limit-stop 43 can also be formed rigid. For example, the limit-stop 43 can be formed by a solid surface of the housing 8. The flexibility of the limit-stop 43, however, brings advantages in the case of a faulty operation. Once the drive device 2 or 7 is stopped shortly after the unlocking and at the beginning of the ejection section A, the latching element 11 can again reach the latching recess from the wrong side by turning the coupling element 16 against the force K of the elastic arm 44 by means of the latching element 11 coming from the ejection section A and bearing against the locking element 12.
(56) It should also not be excluded that the elastic arm 44 is attached to the coupling element 16 and bears against a limit stop 43 which is then rigid and preferably formed by the housing 8. In this case, it is also important that the force K between the limit-stop 43 and the coupling element 16 is larger than the holding torque H.
(57) The invention is described in this description particularly in respect of a rotating synchronizing rod 17. In an analogous manner, however, it is also quite possible that a correction device 50 is also used in the case of synchronizing devices 6 as they are described and shown in the embodiments (not according to the invention) according to the FIGS. 1 to 23B. It is also possible that the correction device 50 is integrated in the area of the drive device 2 and 7 instead of the area of the synchronizing device 6.
LIST OF REFERENCE SIGNS
(58) 1 arrangement 2 first drive device 3 moveable furniture part 4 first ejection device 5 first locking device 6 synchronizing device 7 second drive device 8 housing 9 ejection slider 10 ejection force storage member 11 latching element 12 locking element 13 cardioidal sliding track 14 locking surface 15 synchronizing surface 16 coupling element 16a first coupling element 16b second coupling element 17 synchronizing rod 17a first rod member 17b second rod member 17c third, profile-shaped rod member 18 item of furniture 19 furniture carcass 20 transmission element 21 entrainment member 22 catch lever 23 control lever 24 control track 25 transmission abutment 26 base plate 27 gear rack 28 gear wheel 29 return lever 30 elastic elements 31 holder 32 guide track 33 abutment 34 angled end section 35 inclined deflection section 36 extension guide 37 contact surface 38 mounting plate 39 clearance 40 brackets 41 recesses 42 convex parts 43 limit-stop 44 elastic arm 50 correction device 63 drawer bottom drawer rail SS closing position OS open position VS locking position S over-pressing position OR opening direction over-pressing section A ejection section V locking section DR pressing-through section S tensioning section D axis of rotation M marking B1 first operating position B2 second operating position H holding torque K force
