EP2294944A1 - Locking system - Google Patents

Abstract

The locking system has two locking fittings (50), which are coupled with each other by a movable furniture piece. Each locking fitting has a switching curve, in which a switching element is guided. A locking cavity is formed for the switching element at a loop shaped section.

Description

The present invention relates to a latching system, in particular for a drawer held on a drawer slide.

The EP 1 845 821 discloses a drawer closing and opening device which is lockable by a latching mechanism in a closed position. When closing the drawer, a spring of the ejector is tensioned and a switching element locked to a detent recess. To unlock the locking mechanism, the drawer is pressed against the force of the spring in the furniture body, so that the switching element can then be moved along a switching curve in the opening direction. In such a latching mechanism is disadvantageous that an opening can be made only by pushing the drawer into the furniture body, while a pull on the drawer can cause damage. In addition, it can happen just with wide drawers that only one side of the locking mechanism is unlocked. In such a locking system with two locking mechanisms handling can therefore cause problems.

It is therefore an object of the present invention to provide a locking system that is easy to use and avoids incorrect operations.

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

According to the invention, the latching system comprises at least two detent fittings, which are coupled to one another via a movable furniture part, wherein each detent fitting has a switching cam in which a switching element is guided, and formed on a loop-shaped portion of the switching cam a detent recess for the biased by a force storage element switching element and the detent recess is at least partially movable to cause an unlocking of the switching element in a force acting on the switching element in an opening direction, and when releasing a switching element of a detent fitting causes the force of at least two energy stores unlocking the switching element of the other detent fitting. This ensures that in the locking system unlocking of the switching elements can also be done by pulling on the drawer. As a result, the user has the option of whether he wants to cause an unlocking and thus opening the drawer by pushing or pulling on the drawer. In addition, false actuations are reliably avoided, since upon unlocking of a switching element, the other switching element is automatically unlocked because the force of the two energy storage of the locking fittings moves the switching element from the locked position. In this respect, a drawer is opened, even if a release of the detent fitting was effected only on one side. This simplifies handling and avoids incorrect operations.

Preferably, in the locking fittings, a movable part of the detent recess is biased by a force accumulator in an initial position. As a result, the release force for unlocking the switching element can be adjusted. The force of the force accumulator for biasing the movable part of the detent recess is preferably smaller than the force of two energy accumulators for tensioning the switching elements, so that when unlocking a switching element, the force of two energy stores is sufficient to move the force accumulator for biasing the movable member. On the other hand, the force of the energy accumulator for biasing the movable part of the detent recess is preferably greater than the energy of the energy accumulator for tensioning a switching element, so that unintentional opening of the drawer is avoided.

For a simple construction of the switching cam, the detent recess is preferably formed from a stationary part and a movable part. In this case, the movable part can be performed linearly on the stationary part, wherein a Pivoting movement of the movable part relative to the stationary part is possible.

For a compact design of the locking system, the switching element is coupled to a driver which is movable along a guide track on a housing, wherein the force accumulator biases the driver in the opening direction. In this case, the driver can be coupled to a running rail of a pullout guide. The latching system can be mounted between a furniture body and a drawer, with a drawer slide with a latching fitting is arranged on each side of the drawer.

In order to avoid a slamming of the drawer during a closing movement, each locking fitting may comprise a damper, by means of which the movement of the switching element is braked in a region around the closed position. The damper can be designed as a fluid damper and mounted on a housing of the locking fitting, so that the locking fitting can be installed as a preassembled unit. Furthermore, the damper prevents accidental release of the locking mechanism.

Figur 1

eine perspektivische Ansicht einer Auszugsführung mit ei- nem erfindungsgemäßen Rastbeschlag;

Figur 2

eine perspektivische Ansicht des Rastbeschlags der Figur 1;

Figur 3

eine perspektivische Explosionsdarstellung des Rastbe- schlags der Figur 2;

Figuren 4A bis 4C

mehrere Ansichten des Rastbeschlags der Figur 2;

Figuren 5A bis 5C

mehrere Detailansichten der Schaltkurve des Rastbe- schlags;

Figuren 6A bis 6E

mehrere Ansichten eines Rastbeschlags in unterschiedli- chen Positionen;

Figuren 7A bis 7F

mehrere Ansichten des Rastbeschlags in unterschiedli- chen Positionen;

Figuren 8A und 8B

Ansichten zweier Rastbeschläge eines Rastsystems in un- terschiedlichen Positionen;

Figur 9

eine perspektivische Explosionsdarstellung eines modifi- zierten Ausführungsbeispiels eines Rastbeschlags, und

Figuren 10A bis 10D

mehrere Ansichten des Rastbeschlags der Figur 9 in un- terschiedlichen 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 pullout guide with a latching fitting according to the invention;

FIG. 2

a perspective view of the detent fitting of FIG. 1 ;

FIG. 3

an exploded perspective view of Rastbestschlag the FIG. 2 ;

FIGS. 4A to 4C

several views of the catch of the FIG. 2 ;

FIGS. 5A to 5C

several detailed views of the switching curve of the detent;

FIGS. 6A to 6E

several views of a detent fitting in different positions;

FIGS. 7A to 7F

several views of the detent fitting in different positions;

Figures 8A and 8B

Views of two detent fittings of a latching system in different positions;

FIG. 9

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

FIGS. 10A to 10D

several views of the catch of the FIG. 9 in different positions.

A latching system comprises at least two detent fittings, each detent fitting being mounted on a pullout guide 1. The pullout guide 1 has a guide rail 2 which can be mounted on a furniture carcass and on which a running rail 3 is movably mounted. Between guide rail 2 and track 3 can be arranged auszverlängerernde center rail. On the guide rail 2, a housing 4 is mounted, which has a guide track 5 for a driver 7. The driver 7 comprises a receptacle which can be coupled with a protruding activator 17 on the running rail 3 in a region around the closed position of a drawer. On each side of a drawer can be mounted with a detent fitting 50 a pullout guide 1.

The catch fitting 50 is in FIG. 3 shown in detail. The movable along the guideway 5 driver 7 comprises a boom 8 which is connected to a switching element 10. The switching element 10 is formed as a bent wire having an end portion 9 which is fixed to the boom 8 and engages there in an opening. On the opposite side, the switching element 10 comprises a bent end portion 11 which engages in a groove-shaped switching cam 20 which is formed in two components 18 and 19.

The driver 7 is biased in an opening direction, for which a spring element 6 is mounted on the housing 4. The spring element 6 comprises a cylindrical Housing 64, in which a spring 63 is arranged. The spring 63 abuts on one side on an end face of the housing 6 and on the opposite side to a ring 62 of a rod 60. The rod 60 is provided at one end with a ball portion 61 which is fixed to the driver 7. The spring 63 thus pushes the driver 7 and thus the switching element 10 in the opening direction.

The housing 4 comprises a receptacle 40 in which the strip-shaped component 18 is inserted. In the component 18, a recess is formed, in which the component 19 is inserted. On the component 19, two spaced-apart projections 43 are formed, which engage in corresponding recesses 41 on the housing 4. As a result, the component 19 is firmly fixed to the housing 4.

The component 18 is held displaceably in the receptacle 40 and biased by a spring 30 in an initial position. The spring 30 is fixed at one end 31 to a holder 14 of the housing 4. At the opposite end 32, the spring 30 is connected to the component 18.

In the FIGS. 4A to 4C the catch fitting 50 is shown in the assembled position. The locking fitting 50 is compact and can be mounted below the rails of a pullout guide 1.

In FIG. 5A the switching curve 20 is shown in the components 18 and 19. The groove-shaped switching cam 20 includes a loop-shaped portion 23, in which the bent end portion 11 of the switching element 10 is guided. The switching element 10 is held between the receptacle 40 of the housing 4 and the components 18 and 19 and therefore can not escape from the switching cam 20. At the loop-shaped portion 23, a detent recess 26 is formed, in which the end portion 11 can lock in a closed position. The closed position is the position of a drawer into which a drawer is received in the closed position in a furniture carcass. The closed position can also be adjusted if necessary. The switching element 10 is located in the detent recess 26, the spring 63 acts in the opening direction, wherein the switching element 10 is prevented from moving in the opening direction by the latching recess 26. The switching element 10 can be pressed against a run-up slope 28 in a movement in the closing direction, so that the switching element 10 can be pivoted and moved into a receptacle 27, in order then in the loop-shaped portion 23 to be moved in the opening direction. As a result, the switching element 10 can be unlocked. During a closing movement, the switching element 10 moves from an outlet region 29 into the loop-shaped portion 23 until the switching element 10 engages in a receptacle 25, whereby the drawer rests against a furniture body or a stop. Subsequently, the drawer is released and moves by a short distance in the opening direction, for example, between 1 to 10 mm, so that the switching element 10 can latch on the detent recess 26.

In FIG. 5B the component 18 has been linearly displaced relative to the component 19. As a result, the contour of the switching cam 20 changes. The detent recess 26 is formed from a movable projection 34 and a stationary projection 36, which are formed on the components 18 and 19. The movable projection 34 is displaced together with the component 18 when a tensile force is applied to the switching element 10 in the closed position. Due to the tensile force, the component 18 moves against the force of the spring 30 in the opening direction. Since the component 19 is fixed to the housing 4, this remains stationary.

In a further pulling movement on the switching element 10, the component 18 in the in FIG. 5C shown position moves. Then, the previously formed the detent recess 26 projection 34 of the component 18 in the region of a Entriegelungskanals 35 on the component 19, through which the switching element 10 can be converted into the loop-shaped portion 23 in the opening direction. This also allows an unlocking of the switching element 26 can be effected from the detent position.

The movement of the detent fitting 50 on the pullout guide 1 is in the FIGS. 6 shown.

In FIG. 6A is the pullout guide 1 in an open position and the driver 7 is parked on an angled end portion of the guideway 5. By a closing movement of the drawer, the running rail 3 is coupled to the activator 17 with the driver 7, so that it is moved in the closing direction along the guide track 5. By the movement of the driver 7, the switching element 10 coupled thereto also moves along the switching cam 20. The spring 63 is hereby tensioned.

In FIG. 6B is the switching element 10 arrived in a stop position in which the end portion 11 of the switching element 10 is disposed in the receptacle 25. The driver 7 is in an end position on the guideway 5.

When the user releases the drawer, the switching element 10 moves due to the force of the spring 63 a short distance in the opening direction until the switching element 10 is latched to the latching recess 26 ( FIG. 6C ).

To open the drawer, it can be pressed into the furniture body, so that then the switching element 10 is pressed over the running rail 3, the activator 17 and the driver 7 against the run-on slope 28 and pivoted into the receptacle 27 ( FIG. 6D ). If the drawer is now released, the switching element 10 moves due to the force of the spring 63 in the opening direction in the loop-shaped portion 23 and the outlet region 29 (FIG. FIG. 6E ).

In the FIGS. 7 a modified movement is shown on the detent fitting 50 during opening and closing.

In FIG. 7A there is a drawer in the open position and the driver 7 is parked at an angled end of the guideway 5. The switching element 10 is located in an outlet region 29 of the switching cam 20.

During a closing movement of the activator 17 engages the driver 7 and moves it together with the switching element 10 in the closing direction until the in FIG. 7B reached end position is reached. The bent end portion 11 of the switching element 10 is disposed in the receptacle 25.

By releasing the drawer now the bent end portion of the switching element 10 is latched to the latching recess 26. It is the closed position of the drawer reached ( FIG. 7C ).

Instead of pushing the drawer into the furniture carcass, the drawer is moved by pulling. By applying a tensile force, the switching element 10 moves the movable projection 34 together with the component 18 against the force of the spring 30. Thereby finds a relative movement of the movable Projection 34, the detent recess 26 and the projection 36 on the component 19 instead.

In Figure 7E the switching element 10 has been pulled so far in the opening direction, that now the bent end portion 11 is disposed in a region of the Entriegelungskanals 35 on the component 19. Thereby, the switching element 10 can be moved via the unlocking channel 35 in the loop-shaped portion 23 in the opening direction.

When the switching element 10 is moved through the unlocking channel 35, the spring 30 pushes the displaceable member 18 back into the starting position, wherein an end portion of the component 18 abuts against stops 42 in the receptacle 40 of the housing 4. The switching element 10 can now be moved further in the opening direction in the outlet region 29.

In the locking system according to the invention two locking fittings 50 are provided, for example, a detent fitting 50 may be mounted on a pull-out guide 1 on each side of a drawer. The drawer can now be opened by pressing or pulling. If the drawer is pressed into the furniture body, a movement corresponding to the FIGS. 6A to 6E instead of. If, however, the drawer is pulled out of the closed position, a movement takes place, as in the FIGS. 7A to 7F is shown.

It may happen that when pressing in and / or pulling out of a drawer due to a slight inclination only unlocking on one side of a detent fitting 50 is effected. Then, the switching element 10 is latched to the other detent fitting 50 on the detent recess 26. To avoid this, the forces of the springs 30 and 63 are coordinated.

In Figure 8A is a view of two locking fittings 50 is shown, wherein the upper detent fitting 50 has been unlocked and the switching element 10 is located in a loop-shaped portion 23 of the switching cam 20 and spaced from the detent recess 26 is arranged. In the lower fitting 50, the switching element 10 does not get into the loop-shaped portion 23, because in the opening movement by pulling or pressing no unlocking has been achieved. Then there is a forced unlocking of the switching element 10 by the spring 63 of the upper detent fitting 50 and the spring 63 of the lower detent fitting 50 act against the force of the spring 30 for clamping the component 18. In other words, the forces of the two springs 63 are greater than the force of the remaining one spring 30 in the closing direction. As a result, the component 18 of the lower fitting 50 is moved in the opening direction until the switching element 10 with the end portion 11 reaches the unlocking channel 35 (position FIG. 5C ). This also allows the switching element 10 of the lower detent fitting 50 to move into the loop-shaped portion 23 and further in the opening direction. Then the in FIG. 8B achieved shown position in which both switching elements 10 are freely movable in the opening direction. After unlocking the switching element 10 of the lower detent fitting, the spring 30 pushes the component 18 back into the starting position until one end face bears against the stops 42. The force of the spring 30 is greater than the force of the spring 63, so that even in a locked position of the switching element 10, no accidental opening takes place.

In FIG. 9 a modified embodiment of a detent fitting 50 'is shown, in which the same components are denoted by the same reference numerals. Notwithstanding the first embodiment, a component 18 'is provided, which has a boom 73. The boom 73 forms a stop for a damper 70. The damper has a housing 71 which may contain a fluid. From the housing 71 protrudes a piston rod 72 which rests against the arm 73. About the damper 70, the component 18 ', during retraction of the component 18' by the spring 30, are braked in the movement. The damper 70 reduces the risk of false triggering by greatly accelerating the drawer when closing. In Figure 10A is the switching element 10 is latched to the detent recess 26 of the cam 20. The piston rod 72 is in the retracted position in the housing 71 and abuts the arm 73. The housing 71 of the damper is fixed to a holding element 74 of the housing 4.

In FIG. 10B the switching element 10 is unlocked by pulling on the drawer. The piston rod 72 moves together with the arm 73 in the opening direction. Now, if the drawer is released before the switching element 10 reaches the unlocking channel 35, the spring 30 moves the drawer back in the closing direction. In order to avoid impact, the arm 73 presses on the piston rod 72, which is now retracted into the housing 71 ( FIG. 10C ). This achieves a deceleration of the speed, which can avoid loud impact noises and malfunctions.

In Figure 10D the switching element 10 is again in the latched position on the Ratmulde 26th

The damper 70 can take on several functions. In particular, a braking of the component 18 can be achieved in the closed position. It is also possible to make a deceleration of the switching element 10 shortly before reaching the closed position via the damper. The damper 70 may be formed as a fluid damper, but also elastic spring elements may be used.

LIST OF REFERENCE NUMBERS

1

pull-out guide

2

guide rail

3

runner

4

casing

5

guideway

6

spring element

7

takeaway

8th

boom

9

end

10

switching element

11

end

14

bracket

17

activator

18

component

18 '

component

19

component

20

switching curve

23

section

25

admission

26

catch recess

27

admission

28

starting slope

29

discharge area

30

feather

31

The End

32

The End

34

head Start

35

release channel

36

head Start

40

admission

41

recess

42

attack

43

head Start

50

Locking device

50 '

Locking device

60

pole

61

ball section

62

ring

63

feather

64

casing

70

damper

71

casing

72

piston rod

73

boom

74

retaining element

Claims (10)

Locking system, in particular for a drawer held on a pullout guide (1), with at least two locking fittings (50) which are coupled to one another via a movable furniture part, wherein each latching fitting has a switching cam (20) in which a switching element (10) is guided , and on a loop-shaped portion (23) of the switching cam (20) a detent recess (26) for the by a force accumulator (63) biased switching element (10) is formed, and the detent recess (26) is at least partially movable to a force on the switching element (10) in an opening direction to cause unlocking of the switching element (10), and at a release of a switching element (10) of a detent fitting (50) the force of at least two force accumulators (63) of the two detent fittings (50) unlocking of the switching element (10) of the other detent fitting (50) causes. A latching system according to claim 1, characterized in that in the latching fittings (50) a movable projection (34) of the latching recess (26) is biased by a spring (30) into an initial position. Latching system according to claim 2, characterized in that the force of the spring (30) for biasing the movable projection (34) of the detent recess (26) is smaller than the force of two energy stores (63) for clamping the switching elements (10). Locking system according to claim 2 or 3, characterized in that the force of the spring (30) for biasing the movable part (34) of the detent recess (26) is greater than the force of the energy store (63) for clamping a switching element (10). A latching system according to one of claims 1 to 4, characterized in that the latching recesses (26) are each formed from a stationary component (19) and a movable component (18, 18 '). Locking system according to claim 5, characterized in that the movable component (18, 18 ') is linearly guided on the stationary component (19). Locking system according to one of claims 1 to 6, characterized in that the switching element (10) with a driver (7) is coupled, along a guide track (5) on a housing (4) is movable and the energy storage device (63) the driver (7) biases in the opening direction. Locking system according to claim 7, characterized in that the driver (7) with a running rail (3) of a pullout guide (1) can be coupled. A latching system according to any one of claims 1 to 8, characterized in that at least one detent fitting (50) has a damper (70) to decelerate the movement of the movable member (18 ') in an area around the closing position. Locking system according to claim 9, characterized in that the damper (70) is designed as a fluid damper.

Images