EP2272400A1 - Locking device and drawer slide - Google Patents

Abstract

Detent fitting, in particular for a drawer slide (1) of a drawer, with a switching cam (20) in which a switching element (10) is guided, wherein the switching cam (20) has at least one loop on which a detent recess (26) for by a force accumulator (63) in a detent position biased switching element (10) is provided, wherein the detent recess (26) is at least partially displaceable and / or pivotable and the switching element (10) can be released from the latched position.

Description

The present invention relates to a detent fitting, in particular for a drawer slide of a drawer, with a switching curve in which a switching element is guided, wherein the switching cam has at least one loop on which a detent recess is provided for the biased by a force storage in a detent switching element, as well as a pullout guide.

The EP 743,032 discloses a drawer slide comprising a detent fitting. This comprises a along a switching cam movably mounted latch, which is movable via a driver. The latch is biased by a tension spring. For a locking of the latch, a locking receptacle is formed on the switching cam. From the locked position, the latch can be selectively moved by pressing and pivoting in a guideway of the switching cam or the latch is pulled out over the drawer so that a spring bar deforms and the latch also enters the track of the switching curve. It is disadvantageous that the material load is high when pulling out the latch for the spring bar and such a construction is unsuitable as overload protection, because if the spring bar does not move back to the starting position after repeated deformations, a latching of the latch is in the absence of correctly positioned locking receptacle impossible. In addition, the bendable spring bar can also easily jam, so that opening by pulling on the latch is prevented.

It is therefore an object of the present invention to provide a detent fitting for a pullout guide that allows safe release of the switching element even with a pulling movement.

This object is achieved with a locking fitting with the features of claim 1.

According to the invention the detent recess of the switching cam is at least partially displaceable or pivotally mounted and the switching element is - preferably in an overload - released from the latched position. This will be a Bent and avoided a material loading of the detent recess, which is mounted displaceably or pivotally and therefore allows unlocking of the switching element. This gives the user the ability to unlock the locking fitting either by inserting the drawer slide or the drawer or by pulling out. Even after a large number of unlocking by pulling movements, the locking recess retains the functionality. Pivoting means twisting around a space axis, moving a translation. These two movements can also overlap.

According to a preferred embodiment, the detent recess comprises at least two relatively movable parts. In this case, the movable part of the detent recess may be biased by a spring into an initial position. This ensures that the detent recess is reset after an unlocking movement back to the starting position, so that the switching element can lock again on the detent recess.

In order to move the catch recess at least partially precisely, the movable part can be rotatably mounted about an axis. In this case, the movable part may comprise a disc on which a projection is formed as part of the detent recess, on which a stop for the switching element is formed. The disc can then form the pivot bearing.

According to an alternative embodiment, the movable part of the detent recess is slidably mounted along a linear guide. Thereby, the switching element can be released at a tensile load by moving the movable part.

According to a further embodiment, the switching element can be moved out of the latching position by means of the movable part. In particular, the switching element can be moved by the movable part in an adjacent region of the switching curve, so that then the switching element can be moved by the bias of the spring along the switching curve. As a result, the latching fitting with the movable part is given a further functionality, since the release of the latching fitting can take place on the one hand by a displacement of the switching element and on the other hand by the movable part. The unlocking of the detent fitting on the movable part can be triggered mechanically, electromechanically, magnetically or in other ways.

Furthermore, the switching curve force storage load may be mounted relatively displaceable to the trigger. By a certain, via the force of the energy store adjustable force, the switching curve can be moved over the end portion in the extension direction. Through a recess on the housing of the shutter is fixed, thus the switching curve can be moved relative to the shutter. In an overload situation, a force is exerted on the switching cam in the region of the detent recess via the switching element and its end portion. Due to the larger contact surface of the end section on the switching curve, the switching curve is shifted relative to the trigger. The trigger causes by its oblique contact surface, that the end portion is pressed against the run-on slope. The switching curve is moved further in the extension direction and the end portion enters the loop-shaped area. The ejection mechanism thus aids in opening the pusher. After being triggered by train, the component with the switching cam is moved back into the end position by a force store against the withdrawal direction. When closing the end section can be locked again in the detent recess.

Figur 1

eine perspektivische Ansicht eines erfindungsgemäßen Rastbeschlages an einer Auszugsführung;

Figur 2

eine perspektivische Ansicht des Rastbeschlages der Fi- gur 1;

Figur 3 2;

eine Explosionsdarstellung des Rastbeschlages der Figur

Figuren 4A und 4B

Ansichten der Schaltkurve und des Schaltelements des Rastbeschlages in unterschiedlichen Positionen;

Figuren 5A und 5B

zwei Detailansichten der Schaltkurve gemäß einem ersten Ausführungsbeispiel;

Figuren 6A und 6B

zwei Ansichten der Schaltkurve gemäß einem zweiten Ausführungsbeispiel;

Figuren 7A und 7B

zwei Ansichten der Schaltkurve gemäß einem dritten Aus- führungsbeispiel;

Figuren 8A bis 8C

Ansichten der Schaltkurve gemäß einer vierten Ausfüh- rungsform;

Figuren 9A und 9B

eine perspektivische sowie eine Explosionsdarstellung ei- ner weiteren Ausführungsform eines Rastbeschlags;

Figuren 10A bis 10H

Ansichten der Schaltkurve gemäß einer fünften Ausfüh- rungsform;

Figur 11

eine perspektivische Explosionsdarstellung eines weiteren Ausführungsbeispiels eines Rastbeschlages, und

Figuren 12A bis 12C

mehrere Ansichten des Rastbeschlages der Figur 11 in unterschiedlichen Positionen.

The invention will be explained in more detail with reference to several embodiments with reference to the accompanying drawings. Show it:

FIG. 1

a perspective view of a detent fitting according to the invention on a pullout guide;

FIG. 2

a perspective view of the detent fitting of Figure 1;

Figure 3 2;

an exploded view of the detent fitting of the figure

FIGS. 4A and 4B

Views of the switching cam and the switching element of the detent fitting in different positions;

FIGS. 5A and 5B

two detailed views of the switching curve according to a first embodiment;

Figures 6A and 6B

two views of the switching curve according to a second embodiment;

FIGS. 7A and 7B

two views of the switching curve according to a third embodiment;

FIGS. 8A to 8C

Views of the switching curve according to a fourth embodiment;

Figures 9A and 9B

a perspective and an exploded view of a further embodiment of a detent fitting;

FIGS. 10A to 10H

Views of the switching curve according to a fifth embodiment;

FIG. 11

an exploded perspective view of another embodiment of a detent fitting, and

FIGS. 12A to 12C

several views of the detent fitting of FIG. 11 in different positions.

A pullout guide 1 comprises a stationary guide rail 2 which can be mounted on a furniture body. On the guide rail 2, a running rail 3 is movably held, on which a protruding activator 17 is fixed. Furthermore, between the guide rail 2 and the running rail 3 of a pullout guide, an extending center rail can be arranged. The activator 17 can be coupled to a driver 7, which is movable along a cam guide 5 of a housing 4. The housing 4 can be fixed to the guide rail 2.

On the housing 4, a housing 6 of a spring element is fixed. The housing 6 can be latched to a nozzle 65 which is formed integrally with the housing 4. The driver 7 is coupled to a rod 60 which is locked with a thickened ball-head-like end portion 61 in a dome-like receptacle. The rod 60 is connected at the end opposite to the end portion 61 with a disc 62 to which one end of a spring 63 abuts. The opposite end of the spring 63 is attached to a lid 64 of the Housing 6 supported. The housing 6 may also be integral with the lid 64 as a housing 6 'according to the FIGS. 9A and 9B be executed.

The driver 7 also has a boom 8, on which a coupling element 9 is fixed. The coupling element 9 is connected to a switching element 10, which is formed as a metallic wire having a bent end portion 11. The bent end portion 11 of the switching element 10 engages in a switching cam 20, which is integrally formed with a component 18 made of plastic. The component 18 is fixed to the housing 4 via a fastening element 13. For this purpose, the housing 4 has a counterpart 14 which is latched to the fastening element 13. On the housing 4, a bottom 12 is further formed, which is spaced from the component 18 is arranged. This makes it possible that the wire of the switching element 10 is moved between the bottom 12 and the component 18, wherein the bent end portion 11 engages the switching cam 20. Furthermore, the bottom 12 prevents the deflection of the bent end portion 11 from the switching cam 20.

The function of the switching cam 20 and the switching element 10 will be described with reference to FIGS FIG. 4 explained in more detail.

In a starting position, a drawer coupled to the running rail 3 is in a closed position and the switching element 10 is held in the switching cam 20 in such a way that it is latched. For this purpose, the bent end portion 11 is located in a detent recess 26 of the switching cam 20 and is pressed into the detent recess 26 by the force of the spring 63 via the rod 60, the driver 7 and the other coupling elements. The switching cam 20 in the housing 18 is groove-shaped and comprises a loop-shaped portion 23rd

When the drawer is to be opened from this closed position ( FIG. 4A ), a depression of the drawer in the closing direction to the furniture body, so that the bent end portion 11 is moved against a run-on slope 28 on the cam 20, resulting in that the switching element 10 is pivoted and engages in a receptacle 27 which is offset the detent recess 26 is arranged. When the drawer 1 is released, the switching element 10 can now be moved back into the outlet region 29 of the switching cam 20 due to the force of the force accumulator in the form of the compression spring 63.

In the region of the branch 24, the switching element 10 is therefore first moved into the receptacle 25 until a front panel of the drawer strikes the furniture body. Then the pullout guide 1 is moved back to a latching recess 26 due to the force of the compression spring 63, so that the in FIG. 4A shown position is reached.

During a closing movement of the drawer, the switching element 10 is moved along the switching cam 20 in the loop-shaped portion 23 to a junction 24 which is disposed adjacent to a groove-shaped receptacle 25.

The switching element 10 is moved with the bent end portion 11 in the receptacle 25 until the drawer strikes the furniture body. Subsequently, the user lets go of the drawer, so that the spring 63 moves the drawer slightly together with the driver 7 and the switching element 10 in the opening direction. By this movement, the bent end portion 11 of the switching element 10 enters the detent recess 26, so that the starting position is reached.

In FIG. 5A the area of the switching cam 20 adjacent to the groove-shaped receptacles 25 and 27 is shown in detail. The bent end portion 11 of the switching element 10 is located in the detent recess 26, which is formed by a projection 31 which protrudes from a disc 30. The disc 30 is rotatably supported relative to an adjacent projection 40 of the component 18.

As in FIG. 5B can be unlocked by turning the disc 30 counterclockwise, the switching element 10 by the detent recess 26 is rotated together with the disc 30 so that due to the force of the compression spring 63, the end portion 11 along the projection 31 slides along and in the loop-shaped Section 23 of the switching curve 20 passes. The disk 30 can be biased by an energy storage, for example in the form of a spring, in the starting position, as in FIG. 5A is shown. In this case, the disc 30 abut against a stop of the component 18.

In FIG. 6A a modified embodiment of a switching cam 20 with a detent recess 26 is shown. On a disc 30 ', a projection 31' is formed, which is rotatable together with the disc 30 '. The detent recess 26 is formed by the movable projection 31 'and a fixed projection 41' which is integral is formed with the component 18. Furthermore, 20 further projections 40 'are formed fixed to form the switching cam.

In order to unlock the switching element 10, the disc 30 'can be rotated together with the projection 31', as shown in FIG FIG. 6B is shown. Thereby, a gap is formed between the projection 31 'and the projection 41', by which the bent end portion 11 of the switching element 10 is moved by the force of the compression spring 63. As a result, the end portion 11 returns to the loop-shaped portion 23 of the switching cam 20th

In FIG. 7A a further embodiment of the switching cam 20 is shown, in which the detent recess 26 is formed in several parts. Similar to the embodiment of the FIG. 6A a disk 30 'is rotatably mounted on the component 18. The detent recess 26 is formed by a stationary projection 41 ', which is formed integrally with the projection 40' of the component 18. On the disc 30 ', a bolt-shaped projection 35 is provided, which forms a stop for the bent end portion 11 of the switching element 10. By turning the disc 30 ', the bolt-shaped projection 35 is removed from the projection 41', so that the end portion 11 between the projection 35 and the projection 41 'in the loop-shaped portion 23 of the switching cam 20 can pass.

At the in Figure 8A shown embodiment, a stationary projection 40 "is formed on the switching cam 20, which forms a detent recess together with a movable projection 30". The end portion 11 is held in the starting position in the latching recess 26.

As in FIG. 8B can be released by moving the projection 30 "down a channel 32", through which the end portion 11 can enter the loop-shaped portion 23 of the switching cam 20. The projection 30 "is displaceably mounted on the component 18.

The displaceable projection 30 "may on the one hand be designed as an overload protection in order to unlock the switching element 10 when pulling on the drawer, and on the other hand, a triggering of the switching element 10 can take place via the projection 30". For this purpose, the projection 30 "accordingly FIG. 8C moved in the direction shown to push out the bent end portion 11 of the switching element 10 from the detent recess 26. The unlocking The switching element 10 may be mechanical, electromechanical, magnetic or other triggering means.

In the FIGS. 9A and 9B a catch fitting is shown in which a component 18 'is mounted relative to the shutter 70 in a housing 4 so as to be relatively displaceable. The component 18 'is loaded via an energy store in the form of a tension spring 66 against the extension direction. The tension spring 66 is fixed via a Federendbereich 67 in the counterpart 14 on the housing 4 and via a further Zugfederaufnahme on the component 18 '. By a certain, adjustable by the force of the tension spring 66 force, the switching cam 20 can be moved over the end portion 11 in the extension direction. By a recess 71 on the housing 4 of the trigger 70 is fixed, thus the switching curve 20 can be moved relative to the shutter 70.

The FIGS. 10A to 10H show the process in an overload situation as it can be caused by the manual opening without the previous triggering of the ejection mechanism. The arrows in the FIGS. 10A to 10H illustrate the direction of movement of the component 18 'with the switching cam 20 relative to the trigger 70th

In an overload situation, a force is exerted on the switching cam 20 in the region of the detent recess 26 via the switching element 10 and its end portion 11. Due to the larger contact surface of the end portion 11 on the switching cam 20, the switching cam 20 is displaced relative to the trigger 70. The trigger 70 causes by its oblique contact surface that the end portion 11 is pressed against the run-on slope 28 ( FIGS. 10A to 10C ). The switching cam 20 is further moved in the extension direction and the end portion 11 enters the loop-shaped portion 23. The ejection mechanism thus supports the opening of the running rail 3 a drawer slide 1 coupled drawer ( FIGS. 10D to 10F ). After being triggered by train, the component 18 'with the switching cam 20 is moved back by the tension spring 66 against the extension direction into the end position. When closing the end section can be locked again in the detent recess 26 ( Figures 10F to 10H ).

In the latching fitting according to the invention, the latching recess is formed by a movable part which releases the switching element 10 at a predetermined force. The movable parts 30, 30 ', 30 "can thereby by means of a force accumulator be biased for example in the form of a spring in a starting position. The direction of movement of the movable parts can be chosen arbitrarily, in particular, the projections for securing the switching element can also be moved perpendicular to the direction of movement of the switching element 10.

In FIG. 11 a further embodiment of a detent fitting is shown, which, as in the other embodiments, a housing 4 with a cam guide 5, on which a driver 7 is movable. The driver 7 is biased by a spring means in an opening direction, wherein the spring means comprises a housing 6 in which a compression spring 63 is arranged, which biases a rod 60 "via a ring 62 in the opening direction, said rod 60" via an end portion 61st is coupled to the driver 7.

The driver 7 comprises a boom 8, to which an end portion 9 'of a switching element 10 is fixed. The switching element 10 is formed as a bent wire, which is fixed to the end portion 9 'on the driver 7 and has an opposite curved end portion 11 which is guided in a switching cam 20 which is formed in a component 18 "and a guide member 70". The guide element 70 "comprises laterally two projections 72", each of which engage and are fixed in a receptacle 71 "of the housing 4. The component 18" is displaceably mounted relative to the housing 4 and the guide element 70 " thereby biased by the spring 76 in a starting position, wherein the spring 76 is fixed to a first end 77 on a counterpart 14 of the housing 4 and is fixed to an opposite end 78 to the component 18 ".

In FIG. 12A the switching cam 20 is shown with the end portion 11 in a detent recess 26, which corresponds to the closed position of a coupled to the driver 7 drawer. The switching element 10 can be unlocked as in the first embodiment by pressure in the closing direction, in which case the end portion 11 engages against the stop bevel 28 in the receptacle 27 and is moved by the force of the spring 63 along the switching cam 20 in the opening direction.

A loop-shaped portion 23 of the switching cam 20 is divided, wherein a first part of the loop-shaped portion 23 by the guide member 70 "and a second part by the component 18" is formed. When on the switching element 11 a in FIG. 12A is applied to the right-hand force, for example by pulling on a drawer, the component moves 18 "against the force of the spring 76 to the right, as in FIG. 12B is shown. The guide member 70 "remains stationary due to the coupling with the housing 4.

If the switching element 10 is further moved by pulling in the opening direction, the in FIG. 12C reached shown position. The component 18 "has been displaced by a distance between, for example, 5 mm to 30 mm in the opening direction, so that the switching element 11 is arranged in an unlocking channel 79 in the guide element 70". As a result, the switching element 11 can be moved via the unlocking channel 79 into the loop-shaped section 23 and the adjoining outlet region 29. As soon as the tensile force on the switching element 11 to the component 18 "stops acting, the component 18" moves back to the starting position due to the force of the spring 76. In this case, the spring 76 is fixed to the receptacle 75 of the component 18 "with the end portion 78. In the starting position, the component 18" bears against a stop of the housing 4 or of the guide element 70 ".

LIST OF REFERENCE NUMBERS

1

pull-out guide

2

guide rail

3

runner

4

casing

5

curved guide

6

casing

6 '

casing

7

takeaway

8th

boom

9

coupling element

9 '

end

10

switching element

11

end

12

ground

13

fastener

14

counterpart

17

activator

18

component

18 '

component

18 "

component

20

switching curve

23

Loop-shaped section

24

diversion

25

head Start

26

catch recess

27

admission

28

starting slope

29

discharge area

30

disc

30 '

disc

30 "

head Start

31

head Start

31 '

head Start

32

channel

32 '

channel

32 "

channel

35

head Start

40

head Start

40 '

head Start

40 "

head Start

41

head Start

41 '

head Start

60

pole

60 "

pole

61

Ball-headed end section

62

Disk / ring

63

compression spring

64

cover

65

Support

66

mainspring

67

Zugfederendbereich

70

trigger

70 "

guide element

71

recess

71 "

admission

72 "

head Start

75

admission

76

feather

77

The End

78

The End

79

release channel

Claims (13)

Detent fitting, in particular for a drawer slide (1) of a drawer, with a switching cam (20) in which a switching element (10) is guided, wherein the switching cam (20) has at least one loop on which a detent recess (26) for by a force accumulator (63) in a detent position biased switching element (10) is provided, characterized in that the detent recess (26) is at least partially displaceable and / or pivotable and the switching element (10) can be released from the latched position. Detent fitting according to claim 1, characterized in that the detent recess (26) at least two mutually movable parts (18 ',, 18 ", 30, 30', 30", 35, 40, 40 ', 40 ", 70, 70") includes. Detent fitting according to claim 1 or 2, characterized in that the movable part (30, 30 ', 30 ", 70, 18") of the detent recess (26) is biased by a spring into an initial position. Detent fitting according to one of claims 1 to 3, characterized in that the movable part (30, 30 ') is rotatably mounted about an axis. Detent fitting according to one of claims 1 to 4, characterized in that the movable part (30, 30 ') comprises a disc on which a projection (31, 31', 35) is formed as part of the detent recess (26). Detent fitting according to one of claims 1 to 5, characterized in that the movable part (30 ", 70, 18") is displaceably mounted along a linear guide. Detent fitting according to one of claims 1 to 6, characterized in that by means of the movable part (30 ", 18"), the switching element (10) is movable out of the detent position. Detent fitting according to claim 7, characterized in that the movable part (30 ") shifts the switching element (10) in an adjacent region of the switching cam (20). Detent fitting according to one of claims 1 to 7, characterized in that the switching element (10) is released by an overload from the detent recess (26). Detent fitting according to one of claims 1 to 9, characterized in that the switching element (10) is released by a force in the extension direction from the detent recess (26). Detent fitting according to one of claims 1 to 10, characterized in that the switching element (10) is released by passing an unlocking channel (79) from the detent recess (26). Detent fitting according to one of claims 1 to 10, characterized in that the component (18 ") after the release of the switching element (10) by passing the Entriegelungskanals (79) under the action of an energy accumulator (76) moves back into the locking position of the detent recess (26) becomes. Pull-out guide, in particular for a drawer, characterized in that a detent fitting according to one of the preceding claims is mounted on the drawer guide.

Images