Pop-up device

Abstract

The invention relates to an ejection device (1, 1 ') for a movable furniture part (92, 105), comprising: an ejection element (3, 3') for ejecting the movable furniture part (92, 105) from a closed position into an open starting position; a force accumulator (5) for pre-tensioning the ejection element (3, 3 ') in the opening direction; a latching mechanism for latching the ejection element (3, 3 ') in the closed position when the force store (5) is tensioned; a tensioning element (4), which can be moved by the movable furniture part (92, 105) from an open starting position in the opening direction in order to tension the force store (5), the ejection element (3, 3 ') can be moved by the movable furniture part (92, 105) from the open starting position in the closing direction in order to tension the force store (5), the tensioning element (4) being connected to a transmission, and the ejection element (3, 3') being movable by the movable furniture part (92, 105) from the open starting position in the closing direction in order to tension the force store (5). Through the transmission device, the force used for tensioning the force storage part (5) can be changed along with the path.

Description

Technical Field

[0001] The present invention relates to an ejection device for a movable furniture component, which comprises an ejection element for ejecting the movable furniture component from a closed position to an open start position, an energy storage portion for applying a biasing force to the ejection element in an opening direction, a latch mechanism for locking the ejection element in a closed position in a tensioned state of the energy storage portion, and a tensioning element which can be moved from the open start position in an opening direction under the action of the movable furniture component to tension the energy storage portion, wherein the ejection element can be moved from the open start position in a closing direction under the action of the movable furniture component to tension the energy storage portion. Background Art

[0002] DE 20 2010 009 797 U1 discloses a device for moving a furniture part, wherein an energy storage part applies a force to the furniture part in an opening direction so that the furniture part can be moved from a closed position to a first open position. Starting from this first open position, a first loading control device can then control a loading mechanism for loading the energy storage part when the furniture part is moved in the opening direction so as to then move further in the opening direction after loading. A second loading control device is also provided, which loads the loading mechanism when the furniture part is moved in the closing direction. As a result, the furniture can be moved from the first open position in the opening direction and in the closing direction to be loaded. The lever mechanism for implementing the loading mechanism is relatively complex and there is also the problem that when the movable furniture part is moved in the opening direction, at the end of loading, when the loaded energy storage part is locked, the force suddenly drops. This is considered unpleasant by the operator.

[0003] DE 10 2015 106 781 A1 discloses an ejection device for a movable furniture part, which has a compact design and under the action of which the movable furniture part can be ejected from a closed position into an open position. An energy storage part of the ejection device can be locked in a tensioning position by a latch mechanism, wherein the energy storage part can be loaded by the movable furniture part during movement in the opening direction and in the closing direction. A problem here also lies in the fact that the force for loading the energy storage part increases and the force for tensioning the energy storage part drops quite suddenly when the furniture part is moved in the opening direction. Summary of the invention

[0004] The object of the present invention is therefore to provide an ejection device for a movable furniture part which has improved maneuverability when opening and closing the movable furniture part.

[0005] This problem is solved by an ejection device having the features of claim 1 .

[0006] In the ejection device according to the invention, the tensioning element can be moved by the movable furniture part from the opening starting position in the opening direction in order to tension the energy storage part, and the tensioning element is connected to a transmission device, by which the force for tensioning the energy storage part can be varied over the stroke. Thus, a variation of the force for tensioning the energy storage part can be achieved under the action of the transmission device, so that a sudden drop in force can be largely avoided when the energy storage part is latched or locked in the tensioning position. The transmission device makes the loading process more flexible when moving the tensioning element for the energy storage part.

[0007] Preferably, the distance travelled by the tensioning element from the open starting position in the opening direction during tensioning of the energy storage section is longer than the distance travelled by the ejection element from the open starting position in the closing direction. By means of the longer distance travelled, the loading process can be distributed when moving the tensioning element, so that a smaller force must be applied in total to load the energy storage section from the starting position using the tensioning element than when using the ejection element. When the energy storage section is latched by the latching mechanism, the work required for tensioning the energy storage section remains the same between the open starting position and the tensioned position of the energy storage section. Depending on the direction of movement of the movable furniture part, the energy storage section can be loaded by the tensioning element or by the ejection element.

[0008] In a preferred embodiment, during the movement of the tensioning element from the opening starting position in the opening direction, the forces for tensioning the energy storage portion gradually decrease. This improves handling, because when the movable furniture part is moved in the opening direction, the user must initially apply higher forces to tension the energy storage portion via the tensioning element, but these forces then decrease as the movement in the opening direction increases. This enables a smoother transition between the end of the tensioning process and free travel, in which the energy storage portion is locked in the tensioning position by the latching mechanism.

[0009] The transmission device preferably includes a rotating part, which is connected to the tensioning element and the ejecting element, and the tensioning element and the ejecting element can be moved in opposite directions under the action of the rotating part. Here, the rotating part may include at least one eccentric wheel to achieve flexible transmission. Preferably, the rotating part includes two helical gears, a first gear of which engages with a rack on the ejecting element, and a second gear of which engages with a rack on the tensioning element. When the rotating part moves, the ejecting element and the tensioning element are thus moved in opposite directions by the engagement of these racks. Friction wheels and other force transmission devices can also be used instead of forming racks and gears. The rotating part can also be formed integrally so that the two gears are integral with each other.

[0010] Preferably, the swivel is rotatably mounted on a pivotable lever. This allows the axis of rotation of the swivel to be pivoted via the pivotable lever when the ejection element and the tensioning element are moved. As a result, the distance between the axis of rotation of the swivel and the racks can be changed, thereby changing the transmission ratio. The distance between the racks can be kept constant here, so that the helical gears are also designed so that the junction points on the two gears have the same distance in each case.

[0011] For a compact design, the tensioning element and the ejection element can be linearly guided on the housing, for example by means of corresponding guide means, such as pins, strips, grooves or guide rods.

[0012] The tensioning element preferably comprises a movable drive part which is guided along the guide rail and which can be separated from the movable furniture part after the energy storage part has been tensioned during the movement of the tensioning element in the opening direction. As a result, after the movable furniture part has been separated, the movable furniture part can continue to move in a free travel mode while the tensioning element remains in a position in which the energy storage part is tensioned by means of the connection to the latch mechanism. By moving the movable furniture part into the closed position, the ejection device can then be reactivated as required in order to eject the movable furniture part from the closed position into the open starting position.

[0013] In order to prevent damage to the drive in the event of a malfunction, the drive can be pivotably mounted on the tensioning element. The drive is preferably pretensioned into the engagement position by means of an elastic element, in particular an integrally formed elastic web, and can be rotated by overcoming the spring force so that the movable furniture part from the opening direction can pass over the drive without damaging it.

[0014] The latching mechanism preferably comprises at least one curved guide with a heart-shaped curve, along which the control element connected to the ejection element can be moved and latched to the latch accommodation. Such a "heart-shaped curve" is known to have various shapes and enables the control element to be latched to the latch accommodation, wherein after the control element is unlocked, the control element is moved along the curved guide via the energy storage portion. Preferably, the latching mechanism comprises a curved guide with two heart-shaped curves, on which the control element is guided. To this end, the control element can include two pins, one of which can be moved in each heart-shaped curve, so that a particularly stable latching force is obtained and the energy storage portion can be securely latched.

[0015] The ejection element is preferably formed from several parts and comprises a toothed rack which is displaceable between two end positions relative to the ejection element. The toothed rack can be preloaded into an end position on the ejection element by a spring, so that tolerances can be better compensated by the mobility of the toothed rack on the ejection element. Alternatively, the toothed rack can be moved back into its end position without a spring under the action of the rocker.

[0016] The toothed rack of the ejection element may also include a contact surface, under the action of which the control element of the latch mechanism can be moved into the latch receptacle. This allows the control element to be placed in the latch receptacle in a guided manner, which largely avoids a return movement when the latch is on the latch receptacle and can therefore be performed with little noise.

[0017] The energy storage part is preferably formed as a spring, for example, formed as a tension spring or a compression spring, one side of which is fixed to the housing and the other side opposite is fixed to the ejection element. In addition to a single spring as the energy storage part, several springs can also be formed together as a spring assembly as the energy storage part.

[0018] The pop-up device preferably comprises a self-closing mechanism by which the movable furniture part can be retracted into the closed position. This further improves the maneuverability when the movable furniture part is moved in the closing direction. For a compact design, the self-closing mechanism is preferably formed integrally with the body of the pop-up element or is fixed to the body of the pop-up element by fastening means; in particular, a curved guide for guiding the drive part can be formed on the pop-up element. The drive part can engage with an actuator to travel a predetermined distance, wherein the drive part is preloaded by a spring and preferably a damper, in particular a linear damper, brakes the movement of the drive part in the closing direction.

[0019] The pop-up device and the self-closing device may be displaceably connected to each other so that a spring of the pop-up device and a spring of the self-closing device do not restrict each other.

[0020] In order to avoid large impact noise, preferably a damper is provided, before reaching the opening starting position, the movement of the pop-up element in the opening direction can be braked under the effect of the damper. Such a damper can for example be formed as a linear damper, particularly a fluid damper, or as a rubber buffer.

[0021] Brief description of the attached figure

[0022] The present invention will be explained in more detail below with reference to the accompanying drawings. The accompanying drawings show:

[0023] Figure 1 is a perspective view of an ejection device according to the present invention;

[0024] Figure 2 yes Figure 1 An exploded view of the ejection device;

[0025] Figure 3 is a view of the ejection device in the closed position;

[0026] Figure 4 is a view of the ejection device in an open starting position;

[0027] FIG. 5A to FIG. 5D are several views of the ejection device during tensioning of the energy storage portion by the tensioning element;

[0028] FIG. 6A to FIG. 6D are several views of another perspective of the ejection device during tensioning of the energy storage portion by the tensioning element;

[0029] 7A to 7C are several views of the pop-up device in different positions;

[0030] Figure 8 yes Figure 1 A three-dimensional detail view of a rotating part with a rack of an ejection device;

[0031] 9A to 9D are several detailed views of the rotating portion during the tensioning process;

[0032] Fig.10 are several exemplary diagrams illustrating the tensioning and ejection process of the ejection device;

[0033] Fig.11 is an exploded view of a piece of furniture having a pop-up device according to the present invention;

[0034] Fig.12 yes Fig.11 A perspective view of a drawer of a piece of furniture with an installed pop-up device;

[0035] Fig.13 is an exploded view of another piece of furniture having a pop-up device according to the present invention;

[0036] Fig.14 yes Fig.13 Detailed view of furniture in;

[0037] Fig.15 is an exploded view of an improved ejection device having an integrated self-closing mechanism;

[0038] Figures 16A to 16D yes Fig.15 Several views of a pop-up device with a self-closing mechanism in different positions. DETAILED DESCRIPTION

[0039] The ejection device 1 comprises a housing 2 on which an ejection element 3 is displaceably mounted for ejecting a movable furniture part. A tensioning element 4 is also provided, which is arranged at a distance from the ejection element 3 so that an actuator can be inserted between the ejection element 3 and the tensioning element 4. The ejection device 1 can be used to eject a movable furniture part, such as a drawer, a door, a flap, a sliding door, a revolving furniture or other movable furniture part, from a closed position.

[0040] exist Figure 2 , an exploded view of the ejection device 1 is shown. The housing 2 comprises a first housing part 20 and a second housing part 21. A guide 22 for guiding the tensioning element 4 is provided on the second housing part 21, the tensioning element 4 being engaged in the guide 22 by means of a guide strip 41. An additional guide 22 can be formed on the first housing part 20 in parallel with the guide 22 on the second housing part 21. A guide rail 23 is provided adjacent to the guide 22, the guide rail 23 comprising an ascending ramp 24 for moving a drive 45 on the tensioning element 4. The drive 45 is penetrated by a pin 44 at an opening 46, wherein the pin 44 is displaceable along a slot 43 on the body 40 of the tensioning element 4. An integrally formed elastic web 47 is provided on the drive 45, which biases the drive 45 in an initial position, wherein the drive 45 is rotatably mounted relative to the body 40 by means of the pin 44.

[0041] The tensioning element 4 further comprises a toothed rack 42, which can be connected to the rotating part 6. The rotating part 6 is rotatable about an axis 60 and comprises two helical gears 61 and 62, the gear 61 being engaged with the toothed rack 42 in the mounted position.

[0042] The swivel part 6 is pivotably held on a lever 7, wherein the lever 7 is rotatably mounted via an axle 70 with a pin which engages in openings 25 on the housing parts 20 and 21. The lever 7 comprises two webs 71, at the ends of which bearing receptacles 72 are formed, in which the axle 60 of the swivel part 6 engages. The axle 60 is also guided on the elongated holes 26 of the housing parts 20 and 21.

[0043] The ejection device 1 comprises an energy storage part 5 for pretensioning the ejection element 3 in the opening direction. The energy storage part 5 designed as a spring is fixed to a spring retainer 52 via a first end 50, the spring retainer 52 comprising a web 53 which can be inserted into a slot 27 on the housing part 21. A plurality of slots 27 are arranged at a certain distance from each other so that the spring tension of the energy storage part 5 is adjustable. Alternatively, the adjustment of the spring tension of the energy storage part can be achieved by other means, for example by an adjusting screw or a worm gear.

[0044] The opposite second end 51 of the energy storage part 5 is fixed to the holder 31 of the ejection element 3. The ejection element 3 is held in the housing 2 in a straight line so as to be movable by means of a guide web or other guide means. The ejection element 3 comprises a body 30 having a housing 32, into which a guide element 36 is inserted, the guide element 36 being connected to a rack 35. The guide element 36 comprises a pin 37, on which a spring 38 is mounted, so that the spring 38 and the guide element 36 are inserted into the housing 32, the guide element being preloaded to an end position by the spring 38. Since the guide element 36 is displaceably mounted in the housing 32, the rack 35 is mounted so as to be movable within a certain range relative to the ejection element 3.

[0045] The ejection element 3 further comprises a pressure element 33 which can be connected to a damper 8 to decelerate the ejection element 3. The damper 8 is formed as a linear damper and comprises a damper housing 80 and a piston rod 81 which is movable relative to the damper housing 80. The damper 8 can be formed as a fluid damper, but other damping elements can also be used. As an alternative to a damper 80 with a damper housing 80 and a piston rod 8, a stop damper made of at least partially elastic plastic can also be present only on the ejection element 3 and / or on the housing 2.

[0046] A curved guide 28 with two so-called heart-shaped curves is formed on the housing part 21 in order to be able to lock the control element 10 in position in the tensioned state of the energy storage device 5. Each heart-shaped curve comprises an annular guide with a latching receptacle 29 for the control element 10. The control element 10 comprises two guide elements in the form of a pin 11, each of which engages in the heart-shaped curve of the curved guide 28. The control element 10 is prestressed toward the curved guide 28 by the elastic element 9 and is displaceably guided on the ejection element 3, in particular perpendicularly to the direction of action of the energy storage device 5.

[0047] exist Figure 3, the ejection device 1 is shown in the closed position, the term "closed position" referring to the position of a movable furniture part, such as the closed setting of a door or the closed position of a drawer. In the closed position, the energy storage part 5 is in a tensioned position and is locked by a latching mechanism. The latching mechanism comprises a control element 10, which is latched to a latching receptacle 29 of a curved guide 28 by two pins 11. In order to unlock the latching mechanism, the ejection element 3 can now be moved further in the closing direction, for example a drawer can be moved from the closed position to a push-through position, or a door can be pushed in slightly towards the furniture body to unlock the latching mechanism. Thus, the movable furniture part can cause the plunger 34 on the ejection element 3 to move slightly in the closing direction, so that the pin 11 of the control element moves against the rising ramp 19, so that the pin 11 and the control element 10 are removed from the latching receptacle 29 and displaced laterally to unlock the control element 10. This unlocking leads to a release of the force of the energy storage part 5, which after unlocking pulls the ejection element 3 into the open starting position, as shown in FIG. Figure 4 In this opening starting position, the movable furniture part is, for example, at a distance of between 3 cm and 10 cm from the closed position, so that the movable furniture part (such as a drawer or a door) can be grasped by hand in order to be moved further in the opening direction or moved back in the closing direction. The movement from the closed position to the opening starting position causes the operating lever 7 to rotate.

[0048] FIG. 5A to FIG. 5D The ejection device 1 is shown Figure 4 The tensioning process starts from the open starting position shown. As the manual opening movement proceeds, the actuator 94 connected to the movable or fixed furniture part presses the drive part 45 in the opening direction, and the force is transmitted from the drive part 45 to the tensioning element 4, which in turn is connected via the rack 42 to the rotating part 6 with gears 61 and 62, which also engages with the rack 35 on the pop-up element 3, and the energy storage part 5 engages on the pop-up element 3. The tensioning element 4 and the pop-up element 3 are moved in opposite directions via the rotating part 6. During the resulting movement of the pop-up element 3 in the closing direction, the control element 10 displaceably mounted on the pop-up element 3 is moved along the curved guide 28 together with the latch 11. During the further movement of the pop-up element 3 in the closing direction, the latch 11 moves along an inclined path, thereby ensuring the displacement of the control element 10 relative to the pop-up element 3, as shown in FIG. Figure 5B shown.

[0049] exist Figure 5C In the embodiment, the control element 10 with the latch 11 is located just in front of the latch receiving portion 29. Due to the advancement of the rack 35 relative to the ejection element 3 caused by the movable bearing in the ejection element 3, the contact surface 39 on the rack 35 contacts the control element 10 and Figure 5CThe control element 10 is pressed to the left against the action of the energy storage part 5 and also in the direction of the latch receiving part 29. If the rack 35 moves further in the closing direction, the contact surface 39 presses the control element 10 with the latch 11 into the latch receiving part 29 and the ejection device 1 is in the closed position. Figure 5D The locked closed position is shown, in which the energy storage portion 5 is tensioned.

[0050] Alternatively, a tensioning process for the energy storage 5 can also be achieved if the movable furniture part is not moved in the opening direction but rather in the closing direction backwards. When the actuator 94 presses on the plunger 34 of the ejection element 3, the plunger 34 of the ejection element 3 moves in the closing direction against the force of the energy storage 5, so that the control element 10 with the latch 11, which is displaceably mounted on the ejection element 3, also moves along the curved guide 28. During the further movement of the ejection element 3 in the closing direction, the latch 11 moves along an inclined path, thereby ensuring that the control element 10 is displaced relative to the ejection element 3. When the closed position is reached, the latch 11 is located in the receiving channel at the height of the latch receptacle 29. When the actuator 94 is released, the force of the energy storage 5 pulls the ejection element 3 with the control element 10 in the opening direction, and the latch 11 is placed in the latch receptacle 29.

[0051] FIG. 6A to FIG. 6C Described previously in FIG. 5A to FIG. 5D The movement of the tensioning element 45 during the tensioning process is shown in FIG.

[0052] The movable furniture part is connected to an actuator 94, which is arranged between the plunger 34 and the drive part 45 and is in an open starting position, such as Fig. 6A When the actuator 94 presses the driving part 45 in the opening direction, the force is transmitted from the energy storage part 5 to the ejection element 3, and the ejection element 3 is connected to the rotating part 6 having gears 61 and 62 through the rack 35, and the rotating part 6 is engaged with the rack 42 on the tensioning element 4. The tensioning element 4 and the ejection element 3 move in opposite directions through the rotating part 6.

[0053] exist Figure 6B In the embodiment, the tensioning element 4 has been moved in the opening direction by the actuator 94, and the ejection element 3 has been moved in the closing direction by the connection with the rotating part 6. The energy storage part 5 is almost in the fully tensioned position. Further movement of the actuator 94 in the opening direction causes the drive part 45 to reach the rising slope 24 of the guide rail 23, so that the drive part 45 moves along the narrow slot 43 on the body 40 through the pin 44, so that the drive part 45 moves out of engagement with the actuator 94. In this position, the energy storage part 5 is locked in the tensioned position by the latch mechanism. Figure 6CAs shown, the movable furniture part can now move over the drive 45 and is free to travel, so that a door or drawer or other movable furniture part can be moved without affecting the ejection device.

[0054] If such a failure occurs: the drive portion 45 is arranged in a section of the guide rail 23 so that the drive portion 45 protrudes from the housing 2, the actuator 94 from the opening direction can pass over the drive portion 45 without damaging the drive portion 45, such as Fig.6D The drive part 45 is rotatably mounted on the slot 43 of the tensioning element 4 by means of a pin 44 and is preloaded to an initial position by means of an elastic web 47. The drive part 45 can be rotated against the force of the elastic web 47 so that the actuator 94 passes over the drive part 45 in the closing direction, and then after passing over, the drive part 45 is rotated back on the elastic web 47 and can be used for the next tensioning process.

[0055] exist 7A to 7C In FIG, the ejection device is shown in a different position relative to the damper 8. Fig. 7A , the ejection device is in the latched closed position and the actuator 94 of the movable furniture part is in contact with the plunger 34. If the ejection element 3 is now unlocked, in particular by moving the ejection element 3 in the closing direction so that the control element 10 with the pin 11 is removed from the latch receptacle 29, the energy storage part 5 can now eject the ejection element 3 in the opening direction until it reaches the position of the ejection element 3. Figure 7B The movement from the closed position to the open starting position ensures that the pressure element 33 of the ejection element 3 strikes the piston rod 81 of the damper 8 , so that the damper 8 is compressed and brakes the movement of the ejection element 3 .

[0056] If the actuator 94 is now moved further in the opening direction, the contact with the drive 45 on the tensioning element 4 guides the ejection element 3 in the opposite direction, and the energy storage part 5 is thus tensioned and locked again at the end of the tensioning process, as shown in FIG. Figure 7C As a result of the tensioning process, the ejection element 3 is removed from the damper 8 again, which presses the piston rod 81 back into the extended protruding position, for which a spring is provided in the damper 8. Other linear or rotary dampers can also be used instead of the fluid damper.

[0057] Figure 8The rotating part 6 with the rack 35 and the rack 42 is shown in detail. The rack 35 on the ejection element 3 engages with the helical gear 62 of the rotating part 6. The gear 61 of the rotating part 6 engages with the rack 42 of the tensioning element 4. The distance between the rack 35 and the rack 42 remains constant, and the pitch of the helical gear 61 and the helical gear 62 is such that the sum of the radial distance of the gear 61 from the shaft 60 and the radial engagement of the gear 62 from the shaft 60 is equal in each case with respect to the engagement position. When the rack 35 and the rack 42 move in opposite directions, the lever 7 rotates about the shaft 70, but the engagement positions of the two gears 61 and 62 remain at the same distance. When the ejection element 3 moves from the closed position to the open starting position, the gear 61 and the gear 62 rotate slightly less than one revolution.

[0058] 9A to 9D The tensioning process of the energy storage part relative to the rotating part 6 is shown in detail.

[0059] exist Fig. 9A In the embodiment, the ejection device is in the open starting position, wherein the actuator 94 is arranged between the plunger 34 of the ejection element 3 and the drive part 45 of the tensioning element 4. The shaft 60 of the rotating part 6 is closer to the rack 42 than to the rack 35. If the tensioning process is now started by pressing the actuator 94 against the drive part 45, as shown in FIG. Fig. 9B As shown, the rack 42 moves to drive the rotating part 6. This causes the gear 61 engaged with the rack 42 and the integrally formed gear 62 engaged with the rack 35 to rotate. Since the gears 61 and 62 are formed in a spiral shape, the position of the shaft 60 is changed, and the shaft 60 is now arranged substantially centrally between the two racks 35 and 42. The tensioning process can now be continued, as shown in FIG. Fig. 9C shown.

[0060] At the end of the tensioning process, the drive unit 45 is separated from the actuator 94, as shown in FIG. Fig.9D In this end position, the section of the gear wheel 61 that engages with the rack 42 has the greatest radial distance from the shaft 60. The lever 7 has therefore been rotated towards the opposite rack 35, and the rack 35 engages with the section of the gear wheel 62 that has the smallest radial distance from the shaft 60. The rotating part 6 thus forms a transmission which, due to the different radial distances of the teeth of the gear wheels 61 and 62 from the shaft 60, conducts different force-stroke ratios.

[0061] Fig.10The function of the transmission of the present embodiment example is shown in diagram form. In both diagrams, the center line represents the open starting position of the ejection device 1. From this position, the ejection device can now be tensioned by the movement of the ejection element 3 in the closing direction or by the movement of the tensioning element 4 in the opening direction. The upper diagram shows that the transmission ratio is 1:1 when the energy storage part 5 is tensioned by the movement in the closing direction, because the transmission is not active. Moving the ejection element 3 in the closing direction leads to the tensioning of the energy storage part 5. On the other hand, if the actuator 94 is moved in the opening direction, the variable transmission ratio on the rotating part 6 ensures different force / displacement ratios, which start from a transmission ratio of almost 1:1. Shortly before reaching the tensioning position, the transmission ratio generated by the helical gear 61 and the helical gear 62 is about 1:2.7. Depending on the application and the available construction space, other designs of the gears 61 and 62 and / or other transmission ratios can also be realized.

[0062] The following diagram shows the force of the energy storage portion as a function of the corresponding position of the ejection element 3 for this design example. When the energy storage portion 5 is tensioned by moving the ejection element 3 in the closing direction, the force increases substantially linearly until the closed position is reached. Without a transmission, the force would also increase linearly when the tensioning element 4 is moved in the opening direction and the energy storage portion is tensioned. However, the transmission causes the force for tensioning the energy storage portion 5 to drop as the transmission ratio changes with the stroke. Due to the change in the transmission ratio, the force required to tension the energy storage portion 5 decreases with a greater distance from the opening starting position. This reduces the effect of the force disconnection when the tensioning energy storage portion locked to the latch mechanism reaches the end position.

[0063] Fig.11 An example of application of an ejection device 1 is shown, which is fixed to a movable furniture part 92 in the shape of a drawer. The movable furniture part 92 is held on two pull-out guides 93 on a furniture body 91 of a piece of furniture 90. The ejection device 1 is fixed to the movable drawer and is connected via an actuator 94, which is fixed to the furniture body 91.

[0064] exist Fig.12 In the figure, two pop-up devices 1 are shown fixed to the bottom side of the drawer and engaged with a fixedly arranged actuator 94, so that a movable furniture part 92 formed as a drawer can be popped out from a closed position to an open starting position after unlocking. Of course, the actuator 94 can also be arranged on the drawer and the pop-up device 1 can be fixedly arranged on the furniture body 91. The actuator 94 can also be formed as an element of another functional component. In addition, in addition to being used with drawers, the pop-up device 1 can also be used with other movable furniture parts 92, such as sliding doors, hinged doors, baffles or other movable furniture parts.

[0065] Fig.13 A further piece of furniture 100 is shown having a furniture carcass 101 comprising an upper plate 102, a base 103 and a cabinet element 104. A movable furniture part 105 in the form of a shelf is arranged between the base 103 and the upper plate 102, which movable furniture part 105 is movable relative to the furniture carcass 101 and can be locked in at least one end position, preferably two end positions.

[0066] The movable furniture part 105 is arranged on a guide element 106 which has a guide rail 107 ( Fig.14 ), the guide rail 107 being arranged on a support element 108. Two ejection devices 1 are fixed to the support element 108, which can engage with two actuators 94 on the guide element 106. The ejection device 1 can be used to lock a movable furniture part 105 to a base 103. The guide element 106 with the guide rail 107 can be formed as disclosed, for example, in DE 10 201 9109 866.

[0067] exist Fig.15 In the exploded view, an improved ejection device 1 ' is shown, wherein the housing 2 with the second housing part 21 forms a guide 22 for the tensioning element 4 with the rack 42, as in Figure 2 The embodiment example of the invention has already been described. A curved guide 28 for the control element 10 is formed on the housing part 21, which is displaceably guided on the improved pop-up element 3'. The pop-up element 3' comprises a pressure element 33 which can press the damper 8, pressing the damper housing 80 and the movable piston rod 81 together.

[0068] The pop-up device 1' comprises an energy storage part 5 to apply a biasing force to the pop-up element 3' in the opening direction. An accommodation part 58 is integrally formed on the strip-shaped body 30 of the pop-up element 3', and a retainer 57 on the rack 35 is inserted into the accommodation part 58. The retainer 57 is U-shaped and is used to receive the protrusion 56 on the rocking member 55. The rocking member 55 is rotatably mounted on the accommodation part 58 of the pop-up element 3 and comprises a rib-shaped guide element 54. Since the retainer 57 is displaceably mounted in the accommodation part 58, the rack 35 can be moved within a certain range relative to the pop-up element 3'. Under the action of the rotational movement of the rocking member 55, the rack 35 can therefore be adjusted in one direction under the action of the protrusion 56 in the retainer 57, or the rocking member 55 can be rotated in the opposite direction by the pushing movement of the rack 35. The rocking member 55 can cause a certain relative movement between the rack 35 and the pop-up element 3'.

[0069] The rib-shaped guide element 54 of the rocker 55 can be placed against the guide of the housing 2 to block the rotational movement of the rocker 55 when the ejection device is in the initial position, in which the control element 10 can optionally be tensioned by the ejection element 3 ′ or the tensioning element 4 .

[0070] The body 30 of the ejection device 3 'is formed integrally with the housing 110 of the self-closing mechanism. A curved guide 111 is provided on the housing 110 for guiding the drive part 112, which is preloaded to the end position by the energy storage part 120. One end 121 of the energy storage part 120 designed as a spring is fixed to the holder 119 of the drive part 112, and the opposite end 122 is fixed to the housing 110. The drive part 112 is guided by the guide element 113 in the curved guide 111, and when the energy storage part 120 is tensioned, the drive part 112 can be locked at the angled end section 114.

[0071] An accommodation portion 115 for fixing a connecting portion 116 to a piston rod 117 of a linear damper having a damper housing 118 is provided on the driving portion 112 .

[0072] refer to FIG. 16A to FIG. 16D The function of the self-closing mechanism on the ejection device 1 ′ is described.

[0073] Fig.16A The latching position of the latching mechanism is shown, in which the control element 10 is held by the latch 11 on the latch receiving portion 29. In this closed position, the latching mechanism of the ejection device 1 'can be unlocked, for example when the movable furniture part is moved from the closed position into the overpressure position against the force of the energy storage part 5 so that the latch 11 of the control element 10 moves against the rising slope of the curved guide 28.

[0074] If the control element 10 with the latch 11 is now unlocked from the latched position, the energy storage part 5 pulls the ejection element 3 into the Fig. 16B The housing 110 moves together with the ejection element 3, wherein the actuator 94 is held on the drive part 112. Starting from this position, the actuator 94 can now be moved in the opening direction, so that the drive part 112 moves along the curved guide 111 until it rotates at the angled end section 114 and releases the actuator 94, as shown. Fig. 16C As already described above, further movement in the opening direction now causes the drive portion 45 to move in the opening direction past the actuator 94 in order to tension the energy storage portion 5 . Fig.16D The end of the tensioning process is shown.

[0075] If the actuator 94 moves again in the closing direction after tensioning the pop-up device 1 ', the actuator 94 contacts the drive part 112 and unlocks it from the angled end 114. The drive part 112 can then pull the actuator into the closed position via the energy storage part 120, the movement being braked by the linear damper.

[0076] List of Reference Numerals

[0077] 1. 1' pop-up device

[0078] 2 Shell

[0079] 3. 3' pop-up element

[0080] 4 tensioning elements

[0081] 5 Energy storage unit

[0082] 6 Rotating part

[0083] 7 Leverage

[0084] 8 Damper

[0085] 9 Spring

[0086] 10 Control elements

[0087] 11 pins

[0088] 19 Rising Slope

[0089] 20 Shell part

[0090] 21 Shell part

[0091] 22 Guide

[0092] 23 Rails

[0093] 24 Rising Slope

[0094] 25 Opening

[0095] 26 Long hole

[0096] 27 slots

[0097] 28 curved guide rails

[0098] 29 latch receiving portion

[0099] 30 Main Body

[0100] 31 Retainer

[0101] 32 Accommodation part

[0102] 33 Pressure element

[0103] 34 Plunger

[0104] 35 rack

[0105] 36 guide elements

[0106] 37 pins

[0107] 38 Spring

[0108] 39 Contact Surface

[0109] 40 Main Body

[0110] 41 Guide Rail

[0111] 42 Rack

[0112] 43 Slot

[0113] 44 Pins

[0114] 45. Drive unit

[0115] 46 Opening

[0116] 47 Elastic web

[0117] 50 end

[0118] 51 end

[0119] 52 Spring retainer

[0120] 53 belly plate

[0121] 54 Guide element

[0122] 55 Swinging piece

[0123] 56 Protrusion

[0124] 57 Retainer

[0125] 58 Accommodation

[0126] 60 Axis

[0127] 61 Gear

[0128] 62 Gear

[0129] 70 Axis

[0130] 71 belly plate

[0131] 72 bearing accommodation portion

[0132] 80 Damper housing

[0133] 81 Piston rod

[0134] 90 Furniture

[0135] 91 furniture body

[0136] 92 Movable furniture parts

[0137] 93 Pull out the guide

[0138] 94 Actuator

[0139] 100 Furniture

[0140] 101 furniture body

[0141] 102 board

[0142] 103 base

[0143] 104 Cabinet Components

[0144] 105 movable furniture parts

[0145] 106 Guiding element

[0146] 107 rails

[0147] 108 Support elements

[0148] 110 Shell

[0149] 111 bending guide

[0150] 112 drive unit

[0151] 113 Guiding element

[0152] 115 accommodating part

[0153] 116 connection part

[0154] 117 piston rod

[0155] 118 damper housing

[0156] 119 retainer

[0157] 120 Energy storage unit

[0158] 121 end

[0159] 122 end

Claims

1. An ejection device (1, 1') for a movable furniture part (92, 105), comprising: a) an ejection element (3, 3') for ejecting a movable furniture part (92, 105) from a closed position into an open starting position; b) an energy storage portion (5), the energy storage portion being used to apply a biasing force to the ejection element (3, 3') in an opening direction; c) a latching mechanism for latching the ejection element (3, 3') in the closed position in a tensioned state of the energy storage portion (5); d) a tensioning element (4), which can be moved from the opening starting position in the opening direction under the action of the movable furniture part (92, 105) to tension the energy storage part (5), wherein e) the ejection element (3, 3') can be moved from the open starting position in the closing direction under the action of the movable furniture part (92, 105) to tension the energy storage part (5), It is characterized in that The tensioning element (4) is connected to a transmission, by means of which the force used to tension the energy storage portion (5) can be varied as a function of the stroke.

2. The ejection device according to claim 1, characterized in that: The distance traveled by the tensioning element (4) from the opening starting position in the opening direction during tensioning of the energy storage portion (5) is longer than the distance traveled by the ejection element (3, 3') from the opening starting position in the closing direction.

3. The ejection device according to claim 1 or 2, characterized in that: During the movement of the tensioning element (4) from the opening starting position along the opening direction, the force used to tension the energy storage portion (5) gradually decreases.

4. The ejection device according to any one of the preceding claims, characterized in that The transmission device comprises a rotating part (6), which is connected to the tensioning element (4) and the ejecting element (3, 3'), and the tensioning element (4) and the ejecting element (3, 3') can move in opposite directions under the action of the rotating part (6).

5. The ejection device according to claim 4, characterized in that: The rotating part (6) comprises at least one eccentric wheel.

6. The ejection device according to claim 4 or 5, characterized in that: The rotating part (6) includes two helical gears (61, 62), wherein the first gear (62) is engaged with the rack (35) on the ejection element (3), and the second gear (61) is engaged with the rack (42) on the tensioning element (4).

7. The ejection device according to any one of claims 4 to 6, characterized in that: The rotating part (6) is rotatably mounted on a pivotable lever (7).

8. An ejection device according to any one of the preceding claims, characterized in that The tensioning element (4) and the ejection element (3) are guided along a straight line on the housing (2).

9. An ejection device according to any one of the preceding claims, characterized in that The tensioning element (4) comprises a movable drive part (45), which is guided along a guide rail (23) and can be separated from the movable furniture part (92) after the energy storage part (5) is tensioned during the movement of the tensioning element (4) in the opening direction.

10. The ejection device according to claim 9, characterized in that: The drive portion (45) is pivotably mounted on the tensioning element (4).

11. The ejection device according to any one of the preceding claims, characterized in that The latch mechanism comprises at least one curved guide (28) having a cardioid curve, and a control element (10) connected to the ejection element (3) can be moved on the cardioid curve of the curved guide and can be latched on a latch receiving portion (29).

12. The ejection device according to claim 11, characterized in that The latching mechanism comprises a curved guide (28) having two cardioid curves on which the control element (10) is guided.

13. An ejection device according to any one of the preceding claims, characterized in that The toothed rack (35) is held on the ejection element (3) so as to be movable relative to the ejection element (3, 3').

14. The ejection device according to claim 13, characterized in that: The toothed rack (35) is pretensioned by a spring (38) into an end position on the ejection element (3).

15. The ejection device according to claim 13, characterized in that: The toothed rack (35) is moved in a controlled manner by means of a rocker (55) to an end position on the ejection element (3).

16. An ejection device according to any one of the preceding claims, characterised in that A contact surface (39) is formed on the rack (35) of the ejection element (3, 3'), and the control element (10) of the latch mechanism can be moved into the latch receiving portion (29) on the curved guide (28) under the action of the contact surface (39).

17. An ejection device according to any one of the preceding claims, characterised in that The energy storage part (5) is formed as a spring, one side of which is fixed to the housing (2) and the other opposite side of which is fixed to the ejection element (3, 3').

18. An ejection device according to any one of the preceding claims, characterised in that The ejection device (1, 1') comprises a self-closing mechanism, under the action of which the movable furniture part (92, 105) can be retracted into a closed position.

19. The ejection device according to claim 18, characterized in that The self-closing mechanism is partially formed integrally with a main body (30) of the pop-up element (3'), and a curved guide (111) for guiding a driving portion (112) of the self-closing mechanism is formed on the pop-up element (3').

20. An ejection device according to any one of the preceding claims, characterised in that A damper (8) is provided, by means of which the movement of the ejection element (3, 3') in the opening direction can be braked before the ejection element (3, 3') reaches the opening starting position.

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