DE202009005255U1 - ratcheting - Google Patents

Abstract

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.

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.

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

1 a perspective view of a pullout guide with a latching fitting according to the invention;

2 a perspective view of the detent fitting of 1 ;

3 an exploded perspective view of the detent fitting of 2 ;

4A to 4C several views of the catch of the 2 ;

5A to 5C several detailed views of the switching curve of the detent fitting;

6A to 6E several views of a detent fitting in different positions;

7A to 7F several views of the detent fitting in different positions;

8A and 8B Views of two locking fittings of a locking system in different positions;

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

10A to 10D several views of the catch of the 9 in different positions.

A locking system comprises at least two detent fittings, each detent fitting on a pullout guide 1 is mounted. The pullout guide 1 has a mountable on a furniture body guide rail 2 on, at the one run rail 3 is movably mounted. Between guide rail 2 and track 3 may be arranged an auszeltverlängernde center rail. At the guide rail 2 is a housing 4 mounted, a guideway 5 for a driver 7 having. The driver 7 Includes a receptacle with a protruding activator 17 on the track 3 can be coupled in an area around the closed position of a drawer. On each side of a drawer can be a pullout guide 1 with a catch fitting 50 be mounted.

The catch fitting 50 is in 3 shown in detail. The along the guideway 5 movable carriers 7 includes a boom 8th that with a switching element 10 connected is. The switching element 10 is formed as a bent wire having an end portion 9 which is on the boom 8th is fixed and there engages in an opening. On the opposite side comprises the switching element 10 a bent end portion 11 which is in a groove-shaped switching curve 20 engages in two components 18 and 19 is trained.

The driver 7 is biased in an opening direction, for what to the housing 4 a spring element 6 is mounted. The spring element 6 includes a cylindrical housing 64 in which a spring 63 is arranged. The feather 63 lies on one side on an end face of the housing 6 and with the opposite side on a ring 62 a pole 60 at. The pole 60 is at one end with a sphere section 61 provided on the driver 7 is fixed. The feather 63 thus pushes the driver 7 and thus the switching element 10 in the opening direction.

The housing 4 includes a recording 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 are two spaced-apart projections 43 formed in corresponding recesses 41 on the housing 4 intervention. This is the component 19 firmly on the housing 4 established.

The component 18 is in the recording 40 slidably held and a spring 30 biased in a starting position. The feather 30 is at one end 31 on a bracket 14 of the housing 4 established. At the opposite end 32 is the spring 30 with the component 18 connected.

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

In 5A is the switching curve 20 in the components 18 and 19 shown. The groove-shaped switching curve 20 includes a loop-shaped section 23 in which the bent end section 11 of the switching element 10 is guided. The switching element 10 is between the recording 40 of the housing 4 and the components 18 and 19 kept and therefore can not from the switching curve 20 escape. At the loop-shaped section 23 is a detention well 26 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. Is the switching element 10 in the dormitory 26 , the spring acts 63 in the opening direction, wherein the switching element 10 on a movement in the opening direction through the latching recess 26 is hindered. The switching element 10 can during a movement in the closing direction against a run-on slope 28 be pressed so that the switching element 10 pivoted and in a shot 27 can be moved to then in the looped section 23 to be moved in the opening direction. This allows the switching element 10 be unlocked. During a closing movement, the switching element moves 10 from a spout area 29 in the loop-shaped section 23 into it, until the switching element 10 in a recording 25 engages, whereby the drawer rests against a furniture body or a stop. Subsequently, the drawer is released and moves a short distance in the opening direction, for example between 1 to 10 mm, so that the switching element 10 at the cesspool 26 can lock.

In 5B is the component 18 relative to the component 19 moved linearly. This changes the contour of the switching curve 20 , The resting recess 26 is from a movable projection 34 and a stationary lead 36 formed on the components 18 and 19 are formed. The movable projection 34 becomes together with the component 18 moved when on the switching element 10 in the closed position, a tensile force is applied. Due to the tensile force, the component moves 18 against the force of the spring 30 in the opening direction. Because the component 19 on the housing 4 is fixed, this remains stationary.

In a further pulling movement on the switching element 10 becomes the component 18 in the in 5C shown position moves. Then the former is the doldrums 26 forming lead 34 of the component 18 in the area of an unlocking channel 35 on the component 19 arranged, through which the switching element 10 in the loop-shaped section 23 can be transferred in the opening direction. This can also unlock the switching element 26 be effected from the detent position.

The movement of the detent fitting 50 on the pullout guide 1 will be in the 6 shown.

In 6A is the pullout guide 1 in an open position and the driver 7 is at an angled end portion of the guideway 5 parked. By a closing movement of the drawer, the running rail 3 with the activator 17 with the driver 7 coupled so that this in the closing direction along the guideway 5 is moved. By the movement of the driver 7 also moves the coupled switching element 10 along the switching curve 20 , The feather 63 is stretched here.

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

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

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

In the 7 becomes a modified movement on the detent fitting 50 shown when opening and closing.

In 7A there is a drawer in the open position and the driver 7 is at an angled end of the guideway 5 parked. The switching element 10 is located in a discharge area 29 the switching curve 20 ,

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

By releasing the drawer is now the bent end portion of the switching element 10 at the cesspool 26 locked. It is the closed position of the drawer reached ( 7C ).

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

In 7E became the switching element 10 pulled so far in the opening direction that now the bent end section 11 in an area of the unlocking channel 35 on the component 19 is arranged. This allows the switching element 10 over the unlocking channel 35 in the loop-shaped section 23 be moved in the opening direction.

When the switching element 10 through the unlocking channel 35 is moved, presses the spring 30 the movable component 18 back to the starting position, wherein an end portion of the component 18 at stops 42 in the recording 40 of the housing 4 is applied. The switching element 10 can now continue in the opening direction in the outlet area 29 to be moved.

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

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

In 8A is a view of two locking fittings 50 shown, with the upper detent fitting 50 has been unlocked and the switching element 10 in a loop-shaped section 23 the switching curve 20 located and spaced from the detent recess 26 is arranged. At the lower fitting 50 is the switching element 10 not in the loop-shaped section 23 Arrived because during the opening movement by pulling or pressing no unlocking has been achieved. Then, a forced unlocking of the switching element takes place 10 by the spring 63 the upper detent fitting 50 as well as the spring 63 the lower detent fitting 50 against the force of the spring 30 for clamping the component 18 Act. In other words, the forces of the two springs 63 greater than the force of the remaining one spring 30 in the closing direction. This will make the component 18 of the lower fitting 50 moved in the opening direction until the switching element 10 with the end section 11 to the unlocking channel 35 arrives (position 5C ). This also allows the switching element 10 the lower detent fitting 50 yourself in the loop-shaped section 23 and move further in the opening direction. Then the in 8B achieved position shown in the two switching elements 10 are freely movable in the opening direction. After unlocking the switching element 10 the lower detent pushes the spring 30 the component 18 back to the starting position, until one end side at the stops 42 is applied. The power 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 unintentional opening takes place.

In 9 is a modified embodiment of a detent fitting 50 ' shown, in which the same components are designated by the same reference numerals. Deviating from the first embodiment is a component 18 ' provided that a boom 73 has. The boom 73 forms a stop for a damper 70 out. The damper has a housing 71 which may contain a fluid.

From the case 71 protrudes a piston rod 72 out at the boom 73 is applied. About the damper 70 can the component 18 ' , when retracting the component 18 ' through the spring 30 , are braked in the movement. The damper 70 reduces the risk of false tripping by greatly accelerating the drawer when closing. In 10A is the switching element 10 at the cesspool 26 the switching curve 20 locked. The piston rod 72 is in the retracted position in the housing 71 and lies on the boom 73 at. The housing 71 the damper is on a holding element 74 of the housing 4 fixed.

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

In 10D is the switching element 10 again in the locked position at the Ratmulde 26 ,

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

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1845821 [0002]

Claims (10)

Latching system, in particular for a pull-out guide ( 1 ), with at least two detent fittings ( 50 ), which are coupled to each other via a movable furniture part, wherein each catch fitting a switching curve ( 20 ), in which a switching element ( 10 ) and on a loop-shaped section ( 23 ) of the switching curve ( 20 ) a detent recess ( 26 ) for that by an energy store ( 63 ) biased switching element ( 10 ) is formed, and the catch recess ( 26 ) is at least partially movable to a force on the switching element ( 10 ) in an opening direction an unlocking of the switching element ( 10 ) and when a switching element is unlocked ( 10 ) of a detent fitting ( 50 ) the force of at least two energy stores ( 63 ) of the two catch fittings ( 50 ) an unlocking of the switching element ( 10 ) of the other detent fitting ( 50 ) causes. Locking system according to claim 1, characterized in that in the locking fittings ( 50 ) a movable projection ( 34 ) of the catch recess ( 26 ) by a spring ( 30 ) is biased to a home position. Locking system according to claim 2, characterized in that the force of the spring ( 30 ) for biasing the movable projection ( 34 ) of the catch recess ( 26 ) smaller than the power of two energy stores ( 63 ) for tensioning 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 catch recess ( 26 ) is greater than the energy storage energy ( 63 ) for tensioning a switching element ( 10 ). Locking system according to one of claims 1 to 4, characterized in that the detent recesses ( 26 ) each from a stationary component ( 19 ) and a movable component ( 18 . 18 ' ) are formed. Locking system according to claim 5, characterized in that the movable component ( 18 . 18 ' ) linearly on the stationary component ( 19 ) is guided. Locking system according to one of claims 1 to 6, characterized in that the switching element ( 10 ) with a driver ( 7 ) which is along a guideway ( 5 ) on a housing ( 4 ) is movable and the energy storage ( 63 ) the driver ( 7 ) in the opening direction. Locking system according to claim 7, characterized in that the driver ( 7 ) with a running track ( 3 ) a pullout guide ( 1 ) can be coupled. Locking system according to one of claims 1 to 8, characterized in that at least one catch fitting ( 50 ) a damper ( 70 ) in order to control the movement of the movable component ( 18 ' ) in an area around the closed position to decelerate. Locking system according to claim 9, characterized in that the damper ( 70 ) is designed as a fluid damper.

Images