CN113660886B

CN113660886B - Retracting device for a movable part

Info

Publication number: CN113660886B
Application number: CN202080027311.0A
Authority: CN
Inventors: G·贝尔曼; F·哈特曼
Original assignee: Paul Hettich GmbH and Co KG
Current assignee: Paul Hettich GmbH and Co KG
Priority date: 2019-04-16
Filing date: 2020-03-17
Publication date: 2023-08-18
Anticipated expiration: 2040-03-17
Also published as: EP3955773A1; WO2020212052A1; DE102019110035A1; CN113660886A; EP3955773B1

Abstract

The invention relates to a retraction device (1) for a movable part (5), in particular for a furniture part, comprising a rotatably mounted lever (3), the lever (3) being able to be coupled to the movable part in an angle range between two end positions in order to slow or accelerate the movable part, wherein the lever (3) is pre-stored in one end position by means of an accumulator (7) and the lever (3) is connected in an articulated manner to a connecting element (6) guided along a guide path (26).

Description

Retracting device for a movable part

Technical Field

The invention relates to a retraction device for a movable part, in particular for a furniture part, having a rotatably mounted lever which can be coupled to the movable part in an angular range between two end positions in order to slow down or accelerate the movable part, wherein the lever is pre-stored in one end position via an accumulator.

Background

A pull-out guide with a damping unit is known from DE 10 2012 111 551 A1, in which a drive, which can be coupled to the pull-out guide, is guided linearly on a housing, wherein the drive transmits the damping force of a linear compression damper via a rotatably mounted lever. In order to have a good leverage ratio, the distance between the compression damper and the driver must be relatively large.

EP 1 816 927 discloses a drive for a pull-out guide, wherein the inclined sections are alternately movable along a guide path with curved end sections or rotatably mounted about an axis. In both cases, there is the problem that the tilting section pretensioned by the accumulator releases the force very abruptly to the drive, which is perceptible to the user during the movement of the movable furniture part.

Disclosure of Invention

It is therefore an object of the present invention to provide a retracting device with a compact structure, which enables a softer transition between the uncoupled position and the coupled position of the movable component.

This object is achieved by a retracting device having the features of claim 1.

In the retraction device according to the invention, a rotatably mounted lever is provided, which lever can be coupled to the movable part within a predetermined angular range between two end positions, wherein the lever is connected in an articulated manner to the connecting element guided along the guide path. The force can thus be transmitted to the lever via the connecting element, in particular via the accumulator and the optional damper. This enables a coupling between the linearly acting accumulator and the rotatably mounted lever.

The accumulator preferably experiences a maximum in relation to the spring force during movement of the rotatably mounted lever from the first end position to the second end position. Thus, the rotatably mounted lever can be held in the end position by the tensioned accumulator when overcoming the dead point. Dead center is the point at which the accumulator exerts the greatest force on the rotatably mounted lever. If it is overcome, the direction of action of the accumulator on the rotatable lever is changed. The rotatable lever is thus pretensioned by the accumulator in a first end position in a first direction of rotation and in an opposite second end position in a second, opposite direction of rotation. This ensures a stable fixation of the rotatable lever and thus the movable part coupled thereto in the respective end position.

In another embodiment, the lever of the retraction device can be separated from the movable part in both end positions. Thus, for example, one end position of the drawer may be designated by other stops and the retraction device used to slow the drawer. This can eliminate sliding between the rails of the pull-out guide.

In a further embodiment, the accumulator is connected to the connecting element on the side facing away from the lever. The connecting element and the accumulator can thus be arranged adjacently, which results in a compact structure.

In a preferred embodiment, the lever is rotatably mounted on a housing on which a guide path for the connecting element is formed. The guide path may, for example, extend only linearly, wherein the connecting element is connected in an articulated manner to a carriage guided in the guide path. The connecting element may be formed, for example, as a rod which is movable with the carriage on one side and is connected in an articulated manner to the lever on the opposite side. In an integrated embodiment of the carriage and the connecting element, the connecting element may also be displaceably and rotatably guided in the guide path using bearing elements (e.g. pins) formed thereon.

In a preferred embodiment, a damper is provided which slows the movement of the lever towards the end position. The damper may be connected to the connecting element on the side facing away from the lever, such that the damper and the connecting element are arranged adjacent to one another.

The lever is preferably movable within an angular range between end positions of 60 ° and 120 ° to be coupled to the movable member. The coupling of the levers may occur, for example, due to the lever having a grooved or slotted receptacle in which the protrusion or pin of the movable member engages within this angular range. If the movable part is guided linearly, the ratio between the rotational movement of the lever and the linear movement of the movable part changes, so that upon release of the movable part, a force is not generated too abruptly as compared to a linear guiding of a driver pre-tensioned by a reservoir along a guiding path with an angled end section.

The retraction device according to the invention is preferably used in a pull-out guide for furniture or household appliances. However, the retraction device may also be used with a sliding door or other movable component.

Drawings

The invention is explained in more detail below on the basis of exemplary embodiments with reference to the accompanying drawings. In the drawings:

fig. 1 shows a perspective view of a retraction device according to the invention;

FIG. 2 shows a perspective exploded view of the retraction device of FIG. 1;

fig. 3A to 3E show a plurality of views of the retraction device of fig. 1 without the housing cover in different positions;

fig. 4A to 4D show various views of a retracting device with a pull-out guide according to the present invention;

fig. 5 shows a perspective view of a modified embodiment of the retraction device according to the invention;

FIG. 6 shows a perspective exploded view of the retraction device of FIG. 5;

fig. 7A to 7E show a plurality of views of the retraction device of fig. 5 without the housing cover in different positions;

FIG. 8 shows a graph of force curve in a retracting device with a linear guiding drive, and

fig. 9 shows a graph of the force profile of the retracting device according to the present invention.

Detailed Description

The retraction device 1 comprises a housing 2, a lever 3 being rotatably mounted on said housing 2 about an axis 4. The lever 3 comprises a receptacle 31 into which the movable part 5 can be inserted, the movable part 5 being formed as a pin or a protrusion which engages in a receptacle on the rotatable lever 3 and can be moved therewith. The movable part 5 is displaceably arranged on a receptacle of the rotatably mounted lever 3.

The retraction device 1 is shown in detail in the exploded view of fig. 2. The housing 2 comprises a housing part 21 and a housing cover 20 forming a cavity in the assembled position. A reservoir 7 in the form of a spring, in particular a coil spring, is arranged in the housing 2, a first end 70 of the reservoir 7 being fixed to a wall on the receptacle 22 in the housing 2. The accumulator 7 is connected at an opposite end 71 to a connecting element 6, which connecting element 6 is formed as a rod and has a holder 61 at one end, in which holder 61 the end 71 of the accumulator 7 can be fixed. The connecting element 6 is connected at opposite ends in an articulated manner to the rotatably mounted lever 3, wherein for this purpose a pin 60 on the connecting element 6 engages in an opening 32 on the lever 3, said opening 32 being arranged spaced apart from the axis 4 of the lever 3. The axis 4 of the lever 3 corresponds to its axis of rotation, which is produced by the opening 30 on the lever 3 and the pin 25 on the housing part 21, wherein the end of the lever 3 protrudes laterally outside the housing 2 in the region of the recess 23 of the housing 2 to accommodate the movable part 5 within a predetermined angular range, for example between 60 ° and 120 °.

The retraction device 1 further comprises a damper 8 formed as a linear compression damper, for example a fluid damper, comprising a cylindrical housing 80, a piston rod 81 connected to the piston being displaceably mounted on said cylindrical housing 80. The damper 8 may be fixed to the receptacle 24 of the housing 2, wherein the piston rod 81 is connected to the carriage 9 via a connecting element 82. For this purpose, the carriage 9 has a receptacle 91, into which receptacle 91 the end section of the connecting element 82 is inserted. The carriage 9 further comprises an opening 90, into which opening 90 the bolt 62 of the connecting element 6 is inserted, so that the connecting element 6 is mounted in an articulated manner on the carriage 9. The carriage 9 is guided in a linear guide path 26 on the housing lower part 21.

Fig. 3A shows a retraction device 1 with a tensioning accumulator 7, said accumulator 7 being arranged substantially parallel to the connecting element 6 and adjacent to the connecting element 6. The movable part 5 moves linearly, essentially parallel to the longitudinal direction of the housing 2 and independently of the lever 3 towards the retraction means and is located in front of a receptacle on the rotatably mounted lever 3 when the lever 3 is held in the end position. If the movable part 5, which is coupled to a movable furniture part, such as a drawer or a sliding door, for example, is now moved further into an end position, such as a maximum open position or a closed position, a relative movement occurs between the movable part 5 and the housing 2, as shown in a comparison of fig. 3B and 3C. In fig. 3C, the lever 3 is rotated slightly counter-clockwise, for example between 1 ° and 5 °, so that the connecting element 6 is also pivoted and is now no longer aligned parallel to the reservoir 7. Beyond the dead point and therefore the point of maximum tensioning of the accumulator 7. This results in unlocking of the unit consisting of lever 3, connecting element 6 and accumulator 7, so that accumulator 7 can now transmit force via connecting element 6 to lever 3 to rotate it in a counterclockwise direction of rotation.

In fig. 3D, an intermediate position is shown in which the movable part 5 is displaced radially inwards in a receptacle on the lever 3 and moves over the lever 3. This movement takes place via the accumulator 7 and the connecting element 6, wherein the connecting element 6 is moved along the guide path 26 via the carriage 9. The movement of the lever 3 is carried out until the end position in which the movable part 5 is held. In fig. 3E, the movable part 5 is shown in its end position, in which it is still arranged in the receptacle of the lever 3.

In case of an externally applied reaction force movement, for example a closing movement applied by a user of a thrust element, such as a drawer, the movable part 5 can initiate the extension of the retraction device 1. The accumulator 7 is tensioned counter-clockwise by a corresponding opposite movement of the lever 3 until the lever 3 has overcome the dead point and is then fixed in the opposite first end position according to fig. 3B. Subsequently, according to fig. 3B, a separation occurs between the movable part 5 and the receptacle 31 on the lever 3, and the movable part 5 can be moved again independently of the lever 3, as shown in fig. 3A.

The movement of the rotatable lever 3 can be slowed down by a damper 8, which damper 8 can be designed as a compression and/or extension damper depending on the damping direction. The damper 8 may also optionally be omitted.

In fig. 4A, the retraction device 1 is shown together with a pull-out guide 10, the pull-out guide 10 having a fixing rail 11, the fixing rail 11 being fixable to a furniture body or a household appliance, for example. The intermediate rail 12 is movably mounted on the fixed rail 11, and a further movable rail 13 is arranged on said intermediate rail 12, which further movable rail 13 can be fixed, such as a drawer thrust element or a further component. Instead of three rails, the pull-out guide 10 may also comprise only two rails or more than three rails. In the embodiment shown, the retraction device 1 is arranged on a movable rail 13 and the component 5 movable relative to the retraction device 1 is connected to the fixed rail 11 by means of a schematically shown connection device 14.

In the position shown in fig. 4A, the pull-out guide 10 is located immediately before reaching its end position, wherein the accumulator 7 is tensioned and the lever 3 is in the first end position shown in fig. 3A. If the rail 13 is moved further into its end position, farther from the fixed rail 11, the movable part 5 is coupled to the lever 3 and thus moves the rotatably mounted lever 3 out of its end position, which causes the connecting element 6 with the lever 3 to move beyond the dead point, so that the accumulator 7 drives the connecting element 6 and the lever 3. Fig. 4C shows an intermediate position in which the retraction device is unlocked and the accumulator drives the connecting element 6, whereby the lever 3 is supported on the movable part 5 and thus moves the rail 13 in the direction of the end position.

The movement of the lever 3 with respect to the movable part 5 continues until the position shown in fig. 4D is reached, which substantially corresponds to fig. 3E. The rail 13 has reached its end position and is held in that position by the lever 3 and the component 5 coupled thereto.

In order to extend from the end position, the sequence of movement is reversed, i.e. the retraction device 1 moves together with the rail 13 in the direction of the fixed rail 11, and the accumulator 7 is then tensioned by the rotatably mounted lever 3 and the connecting element 6, since the movable part 5 is coupled to the receptacle of the rotatably mounted lever 3, until the dead point is overcome and the position shown in fig. 4B and 3B is reached. The movable part 5 can then be removed from the receptacle of the lever 3, so that the retraction device 1 with the track 13 can be moved independently of the movable part 5.

Fig. 5 shows a modified embodiment of the retraction device, wherein like parts are identified by like reference numerals. The lever 3 rotatably mounted on the housing 2 comprises a receptacle 31 for the movable part 5. The movable part 5 is formed as a cylindrical bolt and comprises a flat 50 which facilitates the engagement of the movable part 5 on the lever 3.

The retraction device 1 of fig. 5 is shown in detail in the exploded view of fig. 6. The housing 2 comprises a shell-shaped housing part 21 and a housing cover 20 enclosing a cavity in which the accumulator 7 in the form of a spring is arranged. The first end 70 of the accumulator 7 is fixed to the receptacle 22 and the opposite end 71 is connected to the connecting member 40 using the retainer 43. The connecting part 40 is guided substantially linearly in a groove-shaped receptacle on the housing 2.

The connecting part 40 has a pin 41, which pin 41 engages in an opening 42 on the connecting element 6 formed as a rod and connects the two in an articulated manner. The connecting element 6 has a further opening 44, which opening 44 is connected in an articulated manner to the pin 32' on the lever 3. The lever 3 is rotatably mounted around a pin 25.

Further, a damper 8 having a housing 80 and a piston rod 81 movable relative to the housing is provided. The damper 8 is fixed in the receptacle 24 of the housing 2 and the piston rod 81 is coupled to the connecting member 40.

In fig. 7A to 7E, the retraction device of fig. 5 is shown in different positions. The sequence of movements corresponds substantially to that of fig. 3A to 3E, however, no locking of the movable part 5 with the lever 3 takes place in the second end position. The separation between the movable part 5 and the lever 3 here takes place in both end positions of the lever 3. If a retracting device is used on the pull-out guide 10, in the position of fig. 7D, no stopping occurs due to the retracting device 1, but rather separation. The pull-out guide 10 is then stopped only by the other end stops. Thus, for example, it is also possible to pull the slider out of the pull-out guide 10 without being hindered or damaged by the retraction device 1. Furthermore, the flat 50 on the movable part 5 ensures a better screwing into the receptacle 31 of the lever 3.

In fig. 8, a schematic illustration of a retraction device with a linearly movable drive which can be moved along a guide path with an inclined end section and which is pretensioned by a reservoir is shown. The force of the accumulator on the drive and path during unlocking of the retraction device is shown, wherein the schematic must be read from right to left. On the right side, the movable member (e.g., drawer) is in its open end position. The force exerted by the accumulator on the linear guide drive then rises first during closing and then drops relatively abruptly, for example over a distance of 9 mm. In this region, the actuator or tilting section tilts over the movable part and releases the movable part. This occurs relatively abruptly over a short distance.

In fig. 9, a force-distance diagram of the retraction device 1 according to the invention is shown. Here too, it is assumed, starting from the right, that the drawer is in the open end position. During closing, the partially relaxed accumulator is again tensioned, wherein the force through the connecting element 6 and the lever 3 on the movable part 5 rises and experiences a maximum. However, the path between the maximum force of the accumulator on the movable part 5 until the separation of the movable part 5 on the lever 3 takes place over a significantly longer path, for example in the range between 15mm and 40mm, preferably in the range 17mm to 25mm, so that the force transition is less abrupt for the user, which is more comfortable to operate. The maximum force set by the accumulator has been selected to be approximately equal to 20N.

List of reference numerals

1. Retraction device

2. Shell body

3. Lever

4. An axis line

5. Component part

6. Connecting element

7. Accumulator device

8. Damper

9. Sliding frame

10. Pull-out guide

11. Fixed rail

12. Rail track

13. Rail track

14. Connecting device

20. Shell cover

21. Housing part

22. Receptacle base

23. Concave part

24. Receptacle base

25. Pin

26. Guide path

30. An opening

31. Receptacle base

32. An opening

32' pin

40. Connecting component

41. Pin

42. An opening

43. Retainer

44. An opening

50. Flat part

60. Pin

61. Retainer

62. Bolt

70. End portion

71. End portion

80. Shell body

81. Piston rod

82. Connecting element

90. An opening

91. A receptacle.

Claims

1. Retraction device (1) for furniture parts, with a rotatably mounted lever (3) which can be coupled to the movable part (5) in an angular range between two end positions in order to decelerate or accelerate the movable part, wherein the lever (3) is pre-stored in one end position by means of a reservoir (7), characterized in that the lever (3) is connected in an articulated manner to a connecting element (6) which is guided along a guide path (26), wherein the reservoir (7) is connected to the connecting element (6) on the side facing away from the lever (3).

2. Retraction device according to claim 1, characterized in that the accumulator (7) experiences a maximum value with respect to the spring force during the movement of the rotatably mounted lever (3) from the first end position into the second end position.

3. Retraction device according to claim 1 or 2, characterized in that dead points are overcome by means of a tensioned accumulator (7) so as to hold the rotatably mounted lever (3) in an end position.

4. Retraction device according to claim 1 or 2, characterized in that the lever (3) is rotatably mounted on the housing (2), the guide path (26) for the connecting element (6) being formed on the housing (2).

5. Retraction device according to claim 1 or 2, characterized in that the guide path (26) is formed in a linear manner.

6. Retraction device according to claim 1 or 2, characterized in that the connection element (6) is connected in an articulated manner to a carriage (9) guided in the guide path (26).

7. Retraction device according to claim 1 or 2, characterized in that the connection element (6) is formed as a rod.

8. Retraction device according to claim 1 or 2, characterized in that a damper (8) is provided, which dampens the movement of the lever (3) towards the end position.

9. Retraction device according to claim 8, characterized in that the damper (8) is connected to the connecting element (6) with an end facing away from the lever (3).

10. Retraction device according to claim 1 or 2, characterized in that the lever (3) is separated from the movable part (5) in both end positions.

11. Retraction device according to claim 1 or 2, characterized in that the angle between the two end positions of the lever (3) ranges between 60 ° and 120 °.

12. Pull-out guide (10) with a fixed rail (11) and at least one movable rail (12, 13), characterized in that the movable rail (12, 13) can be fixed in an end position by a retraction device (1) according to any one of the preceding claims.

13. A pull-out guide (10) with a fixed rail (11) and at least one movable rail (12, 13), characterized in that the movable rail (12, 13) is movable in the direction of an end position by a retraction device (1) according to any one of claims 1 to 11 and is released again before reaching the end position.