ES2673395T3 - Acceleration device for moving parts of furniture or household appliances - Google Patents

Abstract

Acceleration device for movable parts of furniture or household appliances, especially drawers or doors, presenting: - a housing (2), - a force accumulator (4) attached to the housing (2) by a first end, - at least a drag (13), placed in the housing (2) in a movable way, and which can be pre-tensioned by means of the force accumulator (4), and can be locked in a first final position, - a deflection device (10), housed in the housing (2), through which the force accumulator (4) is connected with the drag (13), - the deflection device (10) being coupled with a mechanical locking device, with which the force accumulator (4), during a tensioning process, in at least one intermediate position between a minimum tensioned position and a maximum tensioned position, characterized in that the force accumulator (4) is maximally tensioned in the first position drag end (13), and why - the drag (13) is collapsed, in its first final position, in an angled end section of a first guide rail (25) of the housing (2), and is embedded with a first carriage (fifteen).

Description

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DESCRIPTION

Acceleration device for moving parts of furniture or household appliances

The invention relates to an acceleration device for movable parts of furniture or household appliances, especially drawers or doors, according to the preamble of claim 1.

From the prior art are known, for example from EP 0 7669 39 A2, opening devices for movable furniture parts, in which a movable part of a piece of furniture is accelerated and thereby expelled, by means of an ejection mechanism, into the opening direction, and the movable part of the furniture, for example a drawer, held first in a closed position, and unlocked the ejection mechanism by traction or compression against the opening direction, and being separated therein the furniture part of the furniture body.

In this, the spring tensioning systems used in the opening, or also closing, devices for the acceleration of the movable furniture parts, have mostly elasticity indices that are mostly linear, and are tensioned in one movement. Continuous, for example, by inserting the movable part of the furniture back to its closed position in the body of the furniture.

A drawback in the opening and closing devices known from the prior art is that, especially in conditions of limited spaces on one of the sides, on the short and strong springs, in which correspondingly the difference in force applied on the part Movable furniture is very high (large AF), the abrupt interruption of the driving force after the tensioning of the spring by the user is perceived as negative. In this case, the use of springs with a flat spring index is normally not possible without additional deflection systems.

Another drawback of the systems known in the state of the art is that, in an interruption of a tensioning process, the energy accumulated until then by the spring is released again against the direction of movement, which leads to the parts of the furniture to open or close again move back to the starting position, and thus, in the worst case, can injure the user.

In order to avoid this it is known, for example, from DE 102 46 438 A1, a drawer system with a closing automatism and a manual locking and release system, by means of which a drawer can be kept open in different positions, in against the force of the spring. Here it is an inconvenience that the user has to act manually to release the lock, that is, it has to act below the drawer to unlock it.

From document DE 10 2008 012 230 U1, an extraction device for a drawer is known, in which an insertion mechanism allows a locking in two positions of a spring tensioning system, namely, in a first retention position, in which a control element is embedded in a retention cavity, and in a second position, in which the control element is held in a stop of a curved guide. An interruption of a tensioning process also releases here the energy accumulated until then by the spring, against the direction of movement.

The objective of the present invention is to make available an acceleration device for movable parts of furniture, that is, a support device, or execution device, to positively or negatively accelerate the opening and / or closing process, in the that a tension of at least one energy accumulator, which is connected to a drag of the acceleration device, can operate without damage and is easily manageable.

This objective is achieved by means of an acceleration device for movable parts of furniture with the characteristics of claim 1.

In the acceleration device according to the invention, with deflection devices housed in a housing of the ejection device, or of the insertion device, through which the force accumulator is connected with a drag, the accumulator being maximized force in the first final position of the drag, the deflection device is coupled with a locking device, with which the force accumulator can be fixed, during a tensioning process, in at least one intermediate position between a position with a tension minimum and a position with a maximum tension, the trailed being, in the first final position, tilted on an angled end section of a first guide rail of the housing, and embedded with a carriage.

Through this, it is possible that, for example, in an ejection device, by re-introducing, for example, a drawer in a body of a piece of furniture, in which the force accumulator is tensioned, the force accumulator, as a consequence of a push too weak on the drawer in the direction of the closing position of the drawer, be held in that intermediate position, and thereby the drawer, directly or indirectly coupled to the device, is only partially ejected from the body of the furniture, and not completely again. With this, the complete discharge of the force accumulator before the end of the tensioning process is effectively avoided.

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Other advantageous embodiments of the invention are the subject of the dependent claims.

According to an advantageous embodiment variant of the invention, the deflection device has a travel curve that modifies, during a tensioning or tensioning process, the distance from the point of articulation of the force accumulator to an axis of rotation of the device for deflection The deflection device has, in particular, a disc-shaped base body, which can rotate around an axis of rotation, on whose perimeter edge, aligned parallel to the axis of rotation, the element can be wound, in a rotation of the base body, of union that is connected with the drag and with the base body, through which the drag is connected with the deflection device.

By modifying the distance from the point of attack of the force accumulator to the turning point of the deflection device, a modification of the turning moment is caused, which advantageously affects the operating comfort in the tensioning procedure. of the movable part of the furniture, since there is no longer an interruption force of the drive as described above, or it is configured very weakly, without modifying the required closing or opening force of the system.

According to another configuration of the invention, the base body of the deflection device has a groove, which extends in a radial direction with respect to the axis of rotation, in which a drag is guided, which extends parallel to the axis of rotation of the device of deflection, and can be guided in a cam curve formed in the housing and / or in a cover surrounding the housing. In this, this cam curve preferably has at least one intermediate position, which defines a blocking position, between a minimum tension position and a maximum tension position of the force accumulator.

Thus, through the combination of such a deflection device with a cam curve, a configuration of locking positions in which the force accumulator can be held, preferably configured as a spring, is made possible in a simple manner. of traction, when the force accumulator is tensioned, and a closing, or a complete opening of the movable part of the furniture, is simply made possible by continuing to push, or by continuing to pull the movable part of the furniture to its final position, without having to manually release the lock.

The invention is described below in more detail according to the exemplary embodiments, with reference to the attached drawings. Shows:

Figure 1, an exploded perspective view of a variant embodiment of an acceleration device with a force accumulator discharge system according to the invention; Figures 2 and 3, plan views from above on an execution variant, configured as an ejection device, of an acceleration device with a force accumulator discharge system according to the invention, in the activation process (with the cover removed);

Figure 4, a partial elevation of the ejection device of Figure 2, showing the cam curve integrated in the housing and under the cover, in the tension state of the force accumulator; Figure 5, a front view of the ejection device, according to Figures 1 to 4, immediately before the ejection of the movable part of the furniture;

Figure 6, a detailed representation of the detail indicated with VI in Figure 5, for the representation of the carriage release position;

Figures 7 to 12, other front views of the ejection device in successive positions during an ejection process;

Figures 13 and 14, front views of the execution variant of the ejection device according to Figures 3 and 4, when the force accumulator is tensioned in a position in which the force accumulator is held in a first locked position;

Figure 15, a partially cut front view, corresponding to Figure 14, of the execution variant of the ejection device, in a second locking position;

Figures 16 to 19, front views of the execution variant of the ejection device, shortly before reaching, or upon reaching the closed position, and

Figures 20 and 21, front views of an adjustment screw of the ejection device, which influences the activation process.

In the following description of the figures, the terms as above, below, left, right, front, back, etc. they refer exclusively to the representation chosen, by way of example, in the respective figures, and to the position of the housings, force accumulators, draggers, deflection device and the like. These terms are not to be understood with restriction, that is, through the different work positions, or the mirror symmetric arrangement, or the like, these references can be modified.

In figure 1, with the reference sign 1, a variant of an acceleration device for movable furniture parts according to the invention, configured as an ejection device, is referred to as a whole.

The acceleration device is described in the following description, by way of example, according to the device of

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ejection represented, a force accumulator 4 being tensioned in that expulsion device in a process of closing the movable part of the furniture, for example a pushing element, such as a movable drawer relative to a body of a furniture, a sliding door or a revolving door. However, the use of such an acceleration device is also imaginable, for example, as for the process of closing an insertion device to support a movable part of a piece of furniture, or of an appliance, or as the opening and / or closing process of a sliding door, or of a hinged door supported by hinges.

In this, the ejection device 1, shown in Figure 1, shows a housing 2 and a cover 3 that closes the housing 2. In the housing 2, as is well seen in the exploded view of Figure 1, they are provided a first guide rail 25 and a second guide rail 26, which run mostly parallel to each other.

In this, on the first guide rail 25 a drag 13 is driven, which can be locked, in a manner known per se, in a first final position, in which a movable and removable piece of a piece of furniture with the help of that drag 13, is in a closed position. The drag 13 is tilted, in that final position, in an angled end section of the first guide rail 25.

For the start of an ejection process, in order to lift the conveyor 13 from its tilted position in the angled section of the first guide rail 25, a lever 8, housed in the housing 2 so that it can be rotated, which, when moving a carriage 15 that protrudes from the housing 2, which can move along the second guide rail 26, and which pushes the movable part of the furniture to be ejected by means of a pusher 16, held on the driven carriage 15, and pressed towards down the lever arm of the lever 8 by a minimum movement of the carriage 15 against the direction of ejection X, so that the other lever arm of the lever 8 pushes a pin of the drag 13 underneath, which serves for guiding the drag 13 in the first guide rail 25 and engaging the guide rail 25, and thereby lifting the drag 13 out of the angled end section of the first guide rail 25 to the area of the first guide rail 25 which is parallel to the second guide rail 26.

By lifting the drag 13 to the area of the first guide rail 25 that is parallel to the second guide rail 26, a tip of the drag 13 pushes behind a stop of the carriage 15, and it is driven to fit the carriage 15 in the direction of expulsion.

As shown in Figure 1, and by way of example in Figure 2, the drag 13 is connected to a force accumulator 4, preferably configured as a tension spring, through a second connecting element 9, of a deflection device 10, and a first connecting element 5, the force accumulator 4 being maximized tensioned when the drag 13 is positioned in the angled section of the first guide rail 25, as shown in Figure 2. The Second connecting element 9, preferably a tension band, or as a piece of cable, is attached by a first end 23 to the drive 13 and by a second end 24 in a housing 12 of a base body 28 of the deflection device 10. It is also imaginable that the second connecting element 9 is configured as a rigid element, for example as a rack. Correspondingly, a first connecting element 5 is connected at one end to the force accumulator 4, configured here as a tension spring, and with its other end also to the base body 28 of the deflection device 10. According to the configuration of the force accumulator 4, a direct connection of the force accumulator 4 with the deflection device 10 is also imaginable.

The deflection device 10 is basically composed, as is well seen in Figure 1, by a base body 28, partially in the shape of a wheel, with housings 12 that extend from the perimeter edge inwards, to accommodate one of the ends 24 of the second connecting element 9, and of one of the ends of the first connecting element 5, specially configured as a tension band, or as a piece of cable.

In the special execution variant shown here, the deflection device 10 is housed, so that it can be rotated, in the housing 2 and in the cover 3, presenting the distance of the attachment point of the force accumulator 4 with respect to an axis 23 of turning the deflection device 10 a development curve that is modified in the course of an opening or closing process.

The perimeter edge 27 of the base body 28, oriented parallel to the axis 23 of rotation, is used therein for the accommodation of the connecting element 9, connected with the drag 13, which can be wound on that perimeter edge 27 during a rotation of the base body 28.

A sector of the edge 27 of the disc-shaped base body 28 has, in a predetermined angular field of the base body 28, a guide groove 11 that extends in the direction of deflection, and on which a sector of the force accumulator rests 4, or the first connecting element 5, connected with the force accumulator 4 and attached to the base body 28, in a predetermined angular field of the deflection device 10, located radially closer to the axis 23 of rotation of the deflection device. Through this, it is possible that the turning moment acting on the deflection device 10 decreases, due to the modification of the point of attack of the force accumulator 4, configured as a traction spring, the force exerted on the deflection device 10, when approaching

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to the closed position of the drag 13, and thereby avoid an abrupt interruption of the driving force when tensioning the ejection device.

As can be seen from figures 1, 2 and 4, in the housing 2, in the area of the deflection device 10, a cam curve 20 is provided on the housing 2 and / or on the inner side of the cover 3 facing towards the housing 2, in which a drag 18 is guided in a groove 19 that extends radially with respect to the axis of rotation 31 of the base body 28, such that the drag 18 is guided in the groove 19 of the base body 28, being able to move radially when a deflection device 10 is rotated in the cam curve 20. In this, the cam curve 20 has at least an intermediate position between a minimum tension position and a maximum tension position of the force accumulator 4, which Define the locked position. In the exemplary embodiment shown in the figures, the cam curve 20 is configured with a first locking position 21 and a second locking position 22.

In an alternative variant of execution, the drag 18, which can be guided in the cam curve 20, is configured such that it is recessed, or lockable without steps in the cam curve 20, during a movement of the base body 28 against the tensioning direction.

According to Figures 2 to 18, only a planned development of an ejection process and a subsequent process of new insertion of the ejection device 1 is described. As mentioned above, Figure 2 shows the starting position of the removal device. ejection, in which the drag 13 is housed in the angled area of the first guide rail 25, and is engaged with the carriage 15. The force accumulator 4 is fully tensioned in that position.

After initiation of the expulsion process by moving the carriage 15 against the ejection device X, in which the drag 13 is extracted from the angled area of the first guide rail 25 towards the area of the guide rail 25 which is parallel to the second guide rail 26, as shown in Figure 5, the drag 13 is pulled by the force accumulator 4, which is connected to the deflection device through the connecting element 5, in the direction of ejection X, through the connecting element 9 and the deflection device 10, and then moves the carriage 15, located in the second guide rail 26, in the eject direction, until the drive 13 and carriage 15 have reached the other end of the respective guide rail 25, 26, and the force accumulator 4 has been brought thereto to the maximum possible release position. This position is represented in Figure 12.

Figures 7 to 11 show the respective intermediate positions in which it is especially shown that the connecting element 5 is guided in the groove 11 of the base body 28 at the beginning of the ejection movement, and thereby the moment of rotation applied on the device of deflection 10 is relatively small, due to the short distance from the point of attack to the axis of rotation 31, and when turning the deflection device 10 clockwise, it exits the groove and rests on the edge perimeter 27 of the base body 28, which, corresponding to its conformation with an increasing angle of rotation, is moved radially from the axis 23 of rotation outward, so that, shortly before reaching the end point of the carriage extraction 15 , or of the drag 13, the drag 13 is towed to the final position, with the maximum turning moment.

As can be seen in Figures 8 and 10, during this ejection process, the drag 18 is guided in the cam curve 20 along a predetermined path, firstly over an area of the cam curve 20 path which is concentric around the axis of rotation 31, and, after exceeding a predetermined angle, is driven closer to the axis of rotation 31 (see Figure 10).

In the subsequent movement of introduction of the carriage 15, or of the drag 13, backwards to the starting position shown in figure 2, the drag 13, as shown in figures 13 to 18, is pushed to the starting position , shown in figure 2, by means of the swinging support 14, rotatably secured to the carriage 15. In this, the force accumulator 4 is tensioned again. In the event that the carriage 15 is interrupted during the tensioning process, in drag 18 it enters, during the travel of the inner radial path of the cam curve 20, and according to the current position of the drag, in a first position of lock 21, shown in figure 14, or in a second lock position 22, shown in figure 15, through which a bounce of the drag 13 is prevented due to the pulling force of the force accumulator 4. such that, by a simple push of the carriage 15 against the ejection device, the closing movement stopped in the first or second locking position 21, 22 can be continued until the final position of the dragger, shown in Figure 17

As can be seen from Figures 18 and 19, the force accumulator 4 is attached to the housing 2 of the extraction device 1 by means of a support 6 of the force accumulator. This support 6 of the force accumulator has an adjustment element, preferably configured as an adjustment screw, by means of which the previous tension of the force accumulator 4 can be individually adjusted by moving the support 6 of the force accumulator in the X direction of expulsion, or against it. Figure 8 shows in this a position of the support 6 of the force accumulator in which the force accumulator 4, configured as a tension spring, is weakly tensioned, while in the position of the support 6 of the force accumulator shown in the Figure 19, the force accumulator 4 is strongly prestressed.

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For the compensation of the tolerances, in the previous adjustment of the path for the activation of the ejection device, an adjustment wheel 29 is also provided in the housing 2, with which the lever 8 can be adjusted in a predetermined starting position of so that, depending on the position of the adjusting wheel, which is preferably provided with an abutment edge 30, configured eccentrically, on which the lower part of the lever, opposed to the drag 13, rests, the dimension can be adjusted of the lever stroke 8. Different adjustments of the adjustment wheel 29 are shown in Figures 20 and 6.

It is important that, when closing a drawer with an extraction device 1, as described above, in the event that the drag 13 pushes the drawer to close it with a too low impact force, the tensile force exerted on the drag it was absorbed, in at least one intermediate position, through the locking device, and with it only a fraction of the tensile force was forwarded to the guidance system. Through this, the drawer would be pushed back, in the direction of the user, with a considerably lower speed, then the user having the possibility to completely close the drawer, without manually releasing a lock, by simply pushing on the same.

List of reference signs

1 acceleration device

2 housing

3 cover

4 force accumulator

5 first joint element

6 power accumulator holder

7 scroll element

8 lever

9 second connecting element

10 deflection device

11 groove / guide groove

12 accommodation

13 drag

14 rocker support

15 car

16 bumper

18 drag

19 slot

20 cam curve

21 lock position

22 lock position

23 first end of the connecting element

24 second end of the connecting element

25 first guide rail

26 second guide rail

27 perimeter edge

28 base body

29 scroll wheel

30 support edge

31 axis of rotation

Claims (13)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. Acceleration device for moving parts of furniture or household appliances, especially drawers or doors, presenting: - a housing (2), - a force accumulator (4) attached to the housing (2) by a first end, - at least one drag (13), placed in the housing (2) in a movable way, and which can be pre-tensioned by means of the force accumulator (4), and can be locked in a first final position, - a deflection device (10), housed in the housing (2), through which the force accumulator (4) is connected with the drag (13), - the deflection device (10) being coupled with a mechanical locking device, with which the force accumulator (4) can be fixed, during a tensioning process, in at least one intermediate position between a minimum tensioned position and a maximum tensioned position, characterized in that the force accumulator (4) is maximally tensioned in the first final position of the drag (13), and why - the drive (13) is folded, in its first final position, in an angled end section of a first guide rail (25) of the housing (2), and is embedded with a first carriage (15). 2. Acceleration device according to claim 1, characterized in that the drive (13) is connected to the deflection device (10) through a first connecting element (9). 3. Acceleration device according to claim 1 or 2, characterized in that the first connecting element (9) is configured as a strap. 4. Acceleration device according to one of the preceding claims, characterized in that the deflection device (10) has a trajectory curve that can modify the distance of the support point of the force accumulator (4) from an axis of rotation ( 31) of the deflection device (10), during an opening or closing process. 5. Acceleration device according to claim 3, characterized in that the deflection device (10) has a disc-shaped base body (28), which can be rotated around an axis of rotation (31), on whose perimeter edge ( 27), parallel to the axis of rotation (31), the connecting element (9) can be wound, connected with the drive (13) and with the base body (28) of the deflection device (10), when turning the base body (28). 6. Acceleration device according to one of the preceding claims, characterized in that a section of the edge (27) of the disc-shaped base body (28) has a constant distance (r) from the axis of rotation (31) of the device deflection (10), and at least one other edge section (27) of the disc-shaped base body (28) has a different distance to the constant distance (r) from the axis of rotation (31) of the deflection device (10 ). 7. Acceleration device according to claim 5 or 6, characterized in that a section of the edge (27) of the disc-shaped base body (28) has a guide groove (11) that extends in the direction of the perimeter, in which rests, in a predetermined angular field of the deflection device (10), a section of the force accumulator (4), or a second connecting element (5), connected with the force accumulator (4) and subject to the base body (28). 8. Ejection and / or insertion device according to claim 7, characterized in that the second connecting element (9) is configured as a tie band or as a piece of cable. 9. Acceleration device according to one of the preceding claims, characterized in that the base body (28) has a groove (19), which extends radially with respect to the axis of rotation (31), in which a drive (18) is guided ) extending parallel to the axis of rotation (31), which can be guided in a cam curve (20) formed in the housing 2 and / or in a cover (3) that closes the housing (2). 10. Acceleration device according to one of the preceding claims, characterized in that the cam curve (20) has a blocking position (21, 22) defining the intermediate position between a minimum voltage position and a maximum tension position . 11. Acceleration device according to one of the preceding claims, characterized in that the drive (18), which can be guided in the cam curve (20), is configured such that it can be embedded or locked without steps in the cam curve (20) with a movement of the base body (28) against the tensioning direction. 12. Acceleration device according to claim 11, characterized in that the drive (18) is configured as a friction disk. 13. Acceleration device according to one of the preceding claims, characterized in that the drive (13) can move in a first guide rail (25) of the housing (2), and can be locked in a first final position, and the carriage (15), which can be coupled with the drive (13) and with the movable part of the furniture, 5 is housed so that it can move in a second guide rail (26) of the housing (2).