EP1195488B1 - Remote controlled locking system for furniture - Google Patents

Description

The invention relates to a locking system for furniture, in particular for office furniture and workshop furniture, with a first and a second furniture element that is movable relative to each other and in an open position and a closed position are transferable.

In order to be able to lock furniture in the closed position against opening, have doors, flaps, drawers or roller blinds of furniture closures on e.g. by means of a key operated Lock cylinder can be completed. The disadvantage is that all the furniture of an office or one Workshop must be locked separately. They are also common different locking cylinders on different furniture mounted so that different keys are necessary.

A locking system for furniture is known from DE 43 16 274 C1, this is an electromechanical that can be controlled via a remote control Has locking organ, which on the body of the furniture is attached. The locking member comprises one Locking piston used to lock the door in a recess a bolt that is connected to the door engages. An electronic sensor detects the position of the door and only allows the locking piston to close when it is closed Close the door.

GB 2 324 827 A describes an opening system for doors a rotary knob. With the knob is a disc connected, which has a radially extending recess. A bolt engages in the recess and prevents it thus turning the rotary knob and opening the door. The bolt is in the direction away from the washer by spring means acted out of engagement with the recess. The Displacement of the bolt away from the disc by a sliding one Bolt, which is arranged transversely to the bolt, prevents. The latch is connected to a solenoid. To the Unlocking the door is controlled by remote control. The solenoid then causes the bolt to move into Direction away from the bolt. The bolt will shift acted upon by the spring means, out of the recess. The rotary knob is released and can be turned. Will the When the rotary knob is released, it returns to its starting position back. After a predetermined time interval, the Solenoid deactivated again, so that the bolt and the bolt return to their starting positions. The rotary knob can therefore not be rotated now.

The object of the present invention is a locking system to propose for furniture that a secure locking of two Furniture elements of the furniture allows the two pieces of furniture can be locked without a key and automatically and by simple means the piece of furniture is prevented can be locked when the furniture elements are not in the closed position.

• eine Riegeleinheit,
  • die mit dem ersten Möbelelement des Möbels verbindbar ist und
  • die einen Riegel aufweist, sowie
• eine Schließeinheit,
  • die mit dem zweiten Möbelelement des Möbels verbindbar ist und
  • die ein fernsteuerbares Sicherungselement aufweist, das ein Gehäuse und einen Schließkolben umfaßt, der zwischen einer zurückgezogenen Löseposition und einer aus dem Gehäuse ausgeschobenen Schließposition, in welcher er mit dem Riegel haltend zusammenwirkt, verstellbar ist,
  • die mechanisch wirkende Sperrmittel zum Sperren des Schließkolbens in der zurückgezogenen Löseposition gegen Verlagerung in die ausgeschobene Schließposition umfaßt welche bei Überführung der Möbelelemente in die geschlossene Position durch den Riegel der Riegeleinheit deaktivierbar sind,
  • wobei die Sperrmittel zwischen einer Sperrstellung, in der sie den Schließkolben sperren, und einer Freigabestellung, in der sie den Schließkolben (15, 415) freigeben, verstellbar sind, und
  • wobei das Sicherungselement (10, 410) lediglich bei sich zueinander in der geschlossenen Position befindlichen Möbelelementen (2, 102, 202, 302; 3, 103, 203, 303) in eine den Riegel (24, 124, 424) haltende Schließposition überführbar ist.

This object is achieved in that the locking system for furniture, in particular for office furniture or workshop furniture, with a first and a second furniture element, which are movable relative to each other and can be transferred into an open position and a closed position, comprehensively

• a latch unit,
  • which can be connected to the first piece of furniture and
  • which has a latch, and
• a clamping unit,
  • which can be connected to the second furniture element of the furniture and
  • which has a remotely controllable securing element which comprises a housing and a closing piston which can be adjusted between a retracted release position and a closing position pushed out of the housing and in which it cooperates with the latch,
  • includes the mechanically acting locking means for locking the locking piston in the retracted release position against displacement into the extended locking position, which can be deactivated by the bolt of the locking unit when the furniture elements are moved into the closed position,
  • the locking means being adjustable between a locking position in which they lock the locking piston and a release position in which they unlock the locking piston (15, 415), and
  • wherein the securing element (10, 410) can only be transferred into a closed position holding the bolt (24, 124, 424) when the furniture elements (2, 102, 202, 302; 3, 103, 203, 303) are in the closed position ,

The advantage of this embodiment is that the two furniture elements, one of which, for example, one Furniture body and the other is a door, only locked if the door is actually closed. This prevents an operator from mistakenly assumes that the furniture elements are closed, even though the door is open.

Because of the fact that the locking piston of the securing element between a withdrawn release position and one from the Housing pushed out closed position, in which he with the Bolt of the bolt unit interacts, adjustable , the first furniture element can be compared to the second furniture element can only be opened when the locking piston is in the withdrawn release position. Is the locking piston the two are in the extended position Furniture parts closed together.

So that the locking piston can only be operated when the two furniture elements, e.g. Door and body closed are, the locking unit includes mechanically acting locking means to lock the locking piston in the retracted release position against shifting into the extended closed position. The locking means are in the closed position of the furniture elements deactivated by the bolt of the bolt unit. If the furniture elements are open, the locking means are activated, so that the latter does not move into the closed position leaves.

In concretization of the invention it is provided that the securing element is designed as a lifting magnet. The blocking agent are also represented by a resilient tongue. This can a relaxed position in which it locks the locking piston, and an actuated position in which it locks the piston releases, ingest. The latch has a footprint for this with which the resilient tongue in the closed position of the two furniture elements held in the loaded position is. Now the solenoid can be activated so that the Locking piston engages in the bolt or behind provides this and prevents its relocation to the open position.

The locking means can also be represented by a locking lever his. This is between a locked position in which the Locking piston is locked and is prevented from the Lock piston is operated, and a release position, in the locking piston is released and can thus be operated can, swivel. The latch then preferably has one Footprint with which the locking lever in the release position transferred and kept in it.

To lock the latch, it can have a recess, into which a pivotally arranged locking lever can be locked is. The swivel lever can be swiveled within the shooting unit arranged and towards the locking position by a spring applied.

In a further embodiment of the invention, it is provided that the locking unit has a bearing for receiving the securing element, a sensor for registering the position of the locking piston,
a circuit board for connecting the fuse element and the sensor and a housing for receiving said components.

The bearing has a wall that forms the closing element surrounds a breakthrough in the wall that prevents the passage the locking piston from the retracted release position in the extended closed position, as well as the Means for locking the locking piston. The camp included The fuse element and sensor are fixed on the board and releasably connected to the housing. So that Sensor can detect the position of the locking piston, it is connected to the bearing and arranged adjacent to the breakthrough. The sensor is equipped with a signal unit for generating a acoustic or optical signal is connected. To this This ensures that the position of the closing piston and thus the closing of the two furniture elements for an operator is perceptible. A check, for example the door of the furniture is locked, is not mandatory.

In a further embodiment of the invention it is provided that the bolt has a recess into which a catch of the Housing is clickable. When closing the first and second Furniture element snaps the catch of the housing into the recess and thus creates a positive connection between the locking unit and the locking unit. For this purpose, that the bolt is resilient or of spring means is acted upon. To reopen the two furniture elements with the locking piston in the release position a release force must be applied that is greater than the holding force the snap connection is. The bolt springs from the latch of the housing away, so that the latter out of engagement comes with the recess.

This will keep the latch in the locked position, that its resilient mobility is reflected in the Closing position located locking piston is canceled. The Latch can now not be disengaged from the latch of the Housing brought. Consequently, the first furniture element locked with the second furniture element.

In concrete terms of the invention, the housing is in two parts executed and has a housing cover and a housing frame with a cavity on it. Thereby are in assembled condition the locking system, the bearing, the securing element, the sensor and the circuit board in the cavity of the rack and from Housing cover arranged closed. The housing frame has a breakthrough through which an electrical cable from the Cavity is lead out. The electrical cable supplies the Solenoids with electrical current and conducts the signal of the Sensors further.

To guide the bolt into a corresponding recess in the Housing is provided that the housing has a bore and the Bolt unit has a bolt. Preferably the end is of the bolt is conical. When closing the two pieces of furniture, for example, a door with the body, the grips Bolt into the hole and center the bolt relative to the Clamping unit.

It is envisaged that the locking system is a control unit has, which for switching the locking piston from the retracted Release into the extended closing position, and vice versa, serves. The control unit comprises a transmitter and one Receiver, which is assigned to the clamping unit and communicates with the transmitter. If the transmitter is activated, receives the receiver sends a signal which indicates the switching of the Closing piston causes. The sensor, which of the clamping unit is assigned, the operator indicates whether the Locking piston transferred to the extended closing position could be or not, that is, whether the furniture was completed could be or not.

The transmitter and the receiver communicate with each other on the Base of radio or infrared waves. It is provided that Transmitter and receiver work on the same frequency, to enable secure communication.

It can also be provided that the control unit has a timer includes. This could be at certain predetermined times activate or deactivate the locking piston and thus lock or open the furniture.

It is particularly envisaged that by means of a single Control unit multiple locking systems are controllable. It is each locking system is assigned to an individual piece of furniture. To this Ways can be done with one control unit at the same time Lock furniture in an office or workshop. This represents a simplification in that not every piece of furniture must be closed individually.

It is further provided that the control unit has means for checking the authorization to switch the locking piston having. This ensures that no unauthorized persons Person opens the clamping unit (s). The means to check the authorization is preferably by a magnetic card reader, a smart card reader, a keypad or shown a fingerprint sensor.

In a further embodiment of the locking system, that the means for locking the locking piston through a locking lever are shown, which is between a locking position, in which the locking piston is locked, and one Release position in which the locking piston is released, is pivotable. Here, the bolt has a footprint, with which the locking lever is transferred to the release position and can be held in this. The latch preferably has a recess in which a locking lever which is pivotable in the locking unit is arranged, can be locked in a locking position is. The locking lever is in this case by a spring Direction to the rest position.

In concretization of the invention it is provided that the first Furniture element in the form of a sliding door, a revolving door or one Folding door and that the second furniture element in the form of a body is designed. Thus the clamping unit is at rest Body and locking unit assigned to the movable door.

But it is also conceivable that both furniture elements relative to Body associated with moving parts. For that it can first and second furniture element, for example in the form of Roller shutter or folding doors can be designed.

It is also provided that a piece of furniture has several first and for this purpose suitably has several second furniture elements. Everyone is there A pair of first and second furniture elements according to the invention Locking system assigned so that all locking systems one piece of furniture can be locked at the same time.

Preferred exemplary embodiments are based on the drawing described.

Figur 1

ein Möbel mit einem Korpus und einer Türe sowie mit einem Schließsystem in perspektivischer Ansicht,

Figur 2

eine perspektivische Explosionsdarstellung eines Schließsystems,

Figur 3

einen Schnitt durch das Schließsystem gemäß Figur 2 in geöffneter Position,

Figur 4

einen Schnitt gemäß Figur 3 in Schließposition,

Figur 5

eine Prinzipskizze des Schließsystems eines Möbels mit einer Drehtür,

Figur 6

eine Prinzipskizze des Schließsystems eines Möbels mit einer Falttür,

Figur 7

eine Prinzipskizze des Schließsystems eines Möbels mit einem Rolladen,

Figur 8

eine perspektivische Explosionsdarstellung eines weiteren Schließsystems,

Figur 9

einen Schnitt durch das Schließsystem gemäß Figur 8 in Schließposition,

Figur 10

eine Ansicht gemäß der Schnittlinie X-X des Schließsystems gemäß Figur 9 und

Figur 11

eine Ansicht gemäß Figur 10, jedoch in geöffneter Position.

It shows

Figure 1

furniture with a body and a door and with a locking system in a perspective view,

Figure 2

a perspective exploded view of a locking system,

Figure 3

3 shows a section through the locking system according to FIG. 2 in the open position,

Figure 4

4 shows a section according to FIG. 3 in the closed position,

Figure 5

a schematic diagram of the locking system of a piece of furniture with a revolving door,

Figure 6

a schematic diagram of the locking system of a piece of furniture with a folding door,

Figure 7

a schematic diagram of the locking system of a piece of furniture with a roller shutter,

Figure 8

3 shows an exploded perspective view of a further locking system,

Figure 9

7 shows a section through the locking system according to FIG. 8 in the closed position,

Figure 10

a view along the section line XX of the locking system according to Figure 9 and

Figure 11

a view according to Figure 10, but in the open position.

1 shows a piece of furniture 1 with a body 2 and one Sliding door 3 as well as with a locking system. The Locking system comprises a locking unit 5, which is connected to the body 2 is firmly connected, and a locking unit 6, which with the Sliding door 3 is firmly connected. At the point where the Bolt unit 6 is attached, the sliding door 3 is broken shown to make the latch unit fully visible to be able to. If the sliding door 3 is in the closed position, so the locking system can be activated to the furniture 1 complete.

Figure 2 shows the locking system in detail. The includes Closing unit 5, a housing 7 with a housing frame 8 and a housing cover 9, a closing element in the form of a lifting magnet 10, a bearing 11 for receiving the solenoid 10, a Sensor 12 and a circuit board 13.

The lifting magnet 10 has a housing 14 and a closing piston 15 on. The locking piston 15 can be inside the housing 14 withdrawn release position and one extended Take the closed position. The solenoid 10 is in the bearing 11 added.

The bearing 11 has a wall 16, an opening 17, one Tongue 18 and clamps 19. The opening 17 in the wall 16 allows adjustment of the closing piston 15 from the release the closed position. By means of the clamps 19, the bearing 11 connected to the board 13. The tongue 18 is resilient and serves to adjust the closing piston 15 lock in the closed position when the door of the furniture is open.

The sensor 12 is in a recess in the wall 16 of the bearing 11 arranged. It serves the position of the locking piston 15 to register and forward to a signal unit 20. The signal unit 20 generates an acoustic or optical signal, which indicates to the operator whether the furniture is locked or not.

The assembly consists of the sensor 12, the solenoid 10 and the bearing 11 is firmly connected to the board 13. The Board 13 has connections 21 with which the sensor 12 and the lifting magnet 10 in terms of line, for example by a soldered connection, are connected. In this way, the solenoid 10 supplied with electrical current and to activate the Closing piston 15 are controlled. Furthermore, a Signal of the sensor 12 are forwarded via the board 13. For this purpose, the board 13 is soldered to an electrical one Cable 22 connected to a control unit 23.

The from the housing 7, the solenoid 10, the bearing 11 Sensor 12 and the circuit board 13 formed clamping unit 5 acts together with the locking unit 6. Here is the clamping unit 5 with a first furniture element, for example a body, to connect a piece of furniture and the bolt unit 6 with a second furniture element, for example a door.

The latch unit 6 comprises a latch 24 with a recess 25. To close the two furniture elements of the furniture snaps a corresponding locking lug 26 associated with the housing 7 is, in the recess 25 of the bolt 24. This is the bolt 24 is resilient and has a guide surface 27. When closing, the latter slides on the latch 26 along, whereby the bolt 24 initially in the direction of the Latch 26 is applied away to finally with the recess 25 springing back the latch 26.

For guiding the locking unit 6 into the locking unit 5 the former a bolt 29 with a conical end, the one corresponding bore 30 of the housing 7 of the clamping unit interacts. In this way, the bolt 24 when Closing the door of the furniture element correctly in the locking unit 5 introduced and centered.

The bolt 24 further includes a footprint 28, the serves to cooperate with the tongue 18 of the bearing 11. Out Figures 3 and 4 is the locking mechanism of the locking system out. Figure 3 shows the locking system in the open and FIG. 4 in the closed position. The two figures are described together below.

When the door 3 is closed, the bolt 24 is engaged by the latch 26 of the housing cover 9 initially in the direction of the latch 26 acted away. If the latch 24 is far enough into the housing 14 is pushed in, the latch 26 engages in the for this corresponding recess 25 of the bolt 24. On in this way a positive connection between the Bolt unit 6 and the locking unit 5 and thus also between the door 3 and the body 2 made. To repeat The door 3 must be opened in the direction away from the body 2 to be pulled. The latch 24 bends from the latch 26 away, so that the latter releases the recess 25 again.

If the door 3 is closed, the footprint 28 of the bolt acts 24 together with the tongue 18 of the bearing 11 and holds it in the loaded position. This way the movability of the closing piston 15, so that the latter by operating the control unit 23 in the closed position can be transferred. The control unit 23 includes one Transmitter 33 and a receiver 32. When the furniture is complete is to be a radio or when the transmitter 33 is pressed Infrared signal passed to the receiver 32. In the control unit 23, the trigger signal is processed and the electrical Cable 22 and the board 13 passed on to the solenoid 10, so that the locking piston 15 in the closed position is transferred.

In the closed position, the closing piston 15 is immediate arranged adjacent to the bolt 24. This prevents that the bolt 24 when trying to open the door 3 springs back and the locking lug 26 releases the recess 25. The interaction of the locking piston 15 and the locking lug 25 ensures a secure hold of the bolt 24 in the Closing unit 5. The door 3 is thus closed with the body 2. To unlock the control unit 23 actuated via the transmitter 33 and the receiver 32, whereby the Closing piston 15 assumes the release position again. Well now the bolt 24 springs back again and the door can be opened again become.

Figures 5, 6 and 7 show the use of locking systems in furniture with different doors.

5 shows a piece of furniture 101 with a revolving door 103 and one Corpus 102. The locking unit 105 is with the The body 102 and the locking unit 106 are connected to the revolving door 103. The latch 124 of the latch unit 106 is L-shaped and in the direction away from the hinge of the revolving door 103 Spring means 31 acted upon. To the resilient mobility of the Latch 124 in the closed position of the revolving door 103, the closing piston 115 of the solenoid in Brought into the closed position. In the drawing figure corresponds this is a shift from the drawing level. To this In this way, the latch 124 of the latch unit 106 can - when trying to open the revolving door 103 - do not spring back so that the latter is closed with the body 102.

As already explained in the description of FIG also in this embodiment means for locking the Locking piston 115 provided. These prevent when open Revolving door 103 that the closing piston 115 in the closed position relocated and this is incorrectly displayed to the operating personnel becomes. Only when the latch 124 with the locking unit 105 is engaged, the means for locking the Closing piston deactivated, so that the solenoid 110 in the Closing position can be transferred.

In the present FIG. 5, the locking unit 106 and the Closing unit 105 each on the corresponding furniture elements (Revolving door 103 and body 102) attached. But is conceivable also an embodiment in which the latch and Closing unit 105, 106 integrated in the respective furniture element, i.e. are inserted flush.

FIG. 6 shows a piece of furniture 201 with a body 202 and one Folding door 203. The same as for the embodiment according to FIG. 5 here the locking unit 205, the body 202 and the locking unit 206 assigned to the folding door 203. The latch unit 206 and the closing unit 205 correspond to those from FIG. 2. With regard to the locking mechanism is therefore on the corresponding referenced above.

7 shows a piece of furniture 301 with a body 302 and two Furniture elements 303 in the form of shutters. Here is the one of the two shutters the latch unit 306 and the other associated with the locking unit 305. Structure and principle of action of the locking system 304 correspond to that from FIG. 2, what will be referred to in this context.

FIGS. 8 to 11 show a further embodiment of a Locking system. Figures 8 and 9 show the structure of the Locking system in detail and are summarized below described.

The locking system comprises a bolt unit 406 with a bolt 424 and a locking unit 405. The locking unit 405 includes a housing frame 408 and a housing cover 409, wherein the latter by means of screws 434 and nuts 435 on the housing frame 408 can be attached.

A circuit board 413 is arranged within the housing frame 408. A bearing 411 is mounted on the board 413 by means of clamps 419 fixable. The bearing 411 has walls 416 for receiving it of a solenoid 410.

The lifting magnet 410 has a housing 414 and a closing piston 415 on. The locking piston 415 can be retracted Take the release position and an extended closing position. The closing piston 415 is through an opening 417 of the Camp 411 out.

The bearing 411 also receives a sensor 412 that is used for this serves to forward a signal that indicates whether the locking system is closed.

The circuit board 413 also has connections 421 which are connected to a Cable 422 as well as with the sensor 412 and the solenoid 410 can be connected. Thus, both the solenoid 410 as well as the sensor 412 with a control unit get connected.

The housing cover 409 has a bearing journal on the inside 436 on which a locking lever 426 is pivotally mounted is. The locking lever 426 has a bore 437 in which a Locking lever 418 can be pivoted with the bearing pin 438 Locking lever 426 is connected. A spring 439 acts on the Lock lever 418.

The function of the locking system is additional below described with reference to Figures 10 and 11.

The locking lever 418 is between a locked position and one Release position pivotable and by means of the spring 439 in the direction acted on the blocking position. The latch lever 426 is indirectly via the locking lever 418 by means of the spring 439 in Directed towards a rest position.

In the open position of the locking system, i.e. if the Bolt 424 is not pushed into the locking unit 405, the locking lever 426 is in the locking position and Locking lever 418 in the locked position. The locking lever 418 has a nose 440, which in this position the transfer of the Locking piston 415 prevented in the closed position. At the Pushing the latch 424 into the locking unit 405 the end of the latch 424 initially against a contact surface 441 of an opening 442 of the locking lever 426. Die The contact surface 441 is designed such that it is pushed in of the latch 424 the latch lever 426 from its latched position is moved so that the latch 424 in the opening 442 of the Can immerse locking lever 426.

As the bolt 424 is pushed in, it bumps Face of the bolt 424 against a contact surface 443 of the Locking lever 418. This also causes another Insert the latch 424 of the locking lever 418 out of its Lock position is moved to the release position. The bar 424 plunges so far into the clamping unit 405 that the Locking lever 426 due to the spring force of the spring 439 in one Recess 425 of the latch 424 is pressed and back into the Rest position is transferred. Thus is in the closed Position of the locking system of the locking lever 426 in the locking position and the locking lever 418 in the release position, as shown in Figure 11.

To close the locking system so that the bolt does not more can be done from the inserted position the closing piston 415 is brought into its closing position. In In this position, the closing piston 415 engages behind a projection 444 of the locking lever 426 and thus prevents the Latch lever 426 by pulling the latch 424 out of it Rest position is moved.

LIST OF REFERENCE NUMBERS

1, 101, 201, 301

Furniture

2, 102, 202, 302

first furniture element / body

3, 103, 203, 303

second furniture element / door

4

locking system

5, 105, 205, 305, 405

closing unit

6, 106, 206, 306, 406

locking unit

7

casing

8, 408

housing frame

9, 409

housing cover

10, 110, 410

Securing element / solenoid

11, 411

camp

12, 412

sensor

13, 413

circuit board

14, 414

casing

15, 415

closing piston

16, 416

wall

17, 417

breakthrough

18, 118, 418

Means for locking / tongue / locking lever

19, 419

jam

20

signal unit

21, 421

connections

22, 422

electric wire

23

control unit

24, 124, 424

bars

25, 425

recess

26, 426

Locking lug / locking lever

27

guide surface

28, 428

footprint

29

bolt

30

drilling

31

spring means

32

receiver

33

Channel

434

screw

435

mother

436

pivot

437

drilling

438

pivot

439

feather

440

nose

441

approach surface

442

breakthrough

443

approach surface

444

head Start

Claims (31)

1. Locking system (4) for pieces of furniture, especially for office furniture or factory furniture, having a first and a second furniture element (2, 102, 202, 302; 3, 103, 203, 303) movable relative to each other and movable into an open position and a closed position, comprising

   a latching unit (6, 106, 206, 306, 406),

   connectable to the first furniture element (2, 102, 202, 302) of the piece of furniture and

   having a latch (24, 124, 424), as well as

   a locking unit (5, 105, 205, 305, 405),

   connectable to the second furniture element (3, 103, 203, 303) of the piece of furniture and

   having a remote controlled retaining element (10, 410), comprising a housing (14, 414) and a locking piston (15, 415), displaceable between a retreated releasing position and a closing position pushed out of the housing (14, 414) and in which it retainingly interacts with the latch (24, 124, 242),

   characterised in that
   the locking unit

   comprises mechanically acting locking means (18, 118, 418) for locking the locking piston (15) in the retreated releasing position against a displacement into the pushed-out closing position, which locking means can be deactivated by the lock (14, 124, 424) of the latching unit (6, 106, 206, 306) by moving the furniture elements (2, 102, 202, 302; 3, 103, 203, 303) into the closed position,

   wherein the locking means are displaceable between a locking position, in which they lock the locking piston (15, 415), and a releasing position, in which they release the locking piston (15, 415), and

   wherein the retaining element (10, 410) is displaceable into a locking position retaining the latch (24, 124, 424) only when the furniture elements (2, 102, 202, 302; 3, 103, 203, 303) are in the closed position relative to each other.
2. Locking system according to claim 1,
   characterised in that
   the retaining element (10, 410) is formed as a lifting magnet.
3. Locking system according to one of claims 1 or 2,
   characterised in that
   the locking means (18, 118) are represented by a flexible tongue, displaceable between a relaxed position, in which it locks the locking piston (15), and a loaded position, in which it releases the locking piston (15).
4. Locking system according to claim 3,
   characterised in that
   the latch (24, 124) has a displacement face (28), by which the tongue is held in the locking position of the two furniture elements (2, 102, 202, 302; 3, 103, 203, 303) in the loaded position.
5. Locking system according to one of claims 1 to 4,
   characterised in that
   the locking means (415) are represented by a locking lever (418), pivotable between a locking position, in which the locking piston is retained, and a releasing position, in which the locking piston is released.
6. Locking system according to claim 5,
   characterised in that
   the latch (424) has a displacement face (428) by which the locking lever (418) can be moved into the releasing position and can be retained in this position.
7. Locking system according to one of claims 5 or 6,
   characterised in that
   the latch (424) has a recess (425), in which a retaining lever (426), pivotably arranged in the locking unit (405), can be retained in the retaining position.
8. Locking system according to claim 7,
   characterised in that
   the retaining lever (426) is loaded by a spring (439) in the direction towards the retaining position.
9. Locking system according to one of claims 1 to 8,
   characterised in that
   the locking unit (5, 105, 205, 305, 405) comprises a sensor (12, 412) for registering the position of the locking piston.
10. Locking system according to one of claims 1 to 9,
    characterised in that
    the locking unit (5, 105, 205, 305, 405) comprises

    a bearing (11, 411) for receiving the retaining element (10, 410),

    a circuit board (13, 413) for connecting the retaining element (10, 410) and the sensor (12, 412) as well as

    a housing (7) for housing said components (11, 12, 13, 411, 412, 413).
11. Locking system according to one of claims 1 to 4,
    characterised in that
    the latch (24, 124) has a recess (25), engageable with a retaining nose (26) of the housing (7).
12. Locking system according to one of claims 1 to 11,
    characterised in that
    the latch (24, 124) is formed elastically.
13. Locking system according to one of claims 1 to 11,
    characterised in that
    the latch (24, 124) is loaded by spring means (31).
14. Locking system according to one of claims 12 or 13,
    characterised in that
    the latch (24, 124) is locked by the locking piston (15), positioned in the locking position, against displacement.
15. Locking system according to one of claims 1 to 14,
    characterised in that
    the bearing (11, 411) comprises

    a wall (16, 416), enclosing the retaining element (10, 110, 410),

    an aperture in the wall (16, 416), which enables the passing of the locking piston (15, 415) from the retreated releasing position into the pushed out closing position, as well as

    the means (18, 118, 418) for retaining the locking piston (15, 415).
16. Locking system according to claim 9,
    characterised in that
    the sensor (12, 412) is connected to the bearing (11, 411) and is arranged next to the aperture (17, 417).
17. Locking system according to claim 9,
    characterised in that
    the sensor (12) is connected to a signal unit (20) for producing an acoustic or optical signal.
18. Locking system according to claim 10,
    characterised in that
    the bearing (11, 411) is retained together with the retaining element (15, 415) and the sensor (12, 412) on the circuit board (13, 413) and is detachably connected by means of this to the housing (14, 414).
19. Locking system according to claim 18,
    characterised in that
    the housing (7) is formed in two pieces and has a housing lid (9, 409) and a housing frame (8, 408) having a hollow space, wherein in the mounted state of the locking system (4, 104, 204, 304, 404), the bearing (11, 411), the retaining element (15, 415), the sensor (12, 412) and the circuit board (13, 413) are arranged in the hollow space of the housing frame (8, 408) and are closed-off by the housing lid (9, 409), wherein furthermore, the housing frame (8, 408) has an aperture, through which an electric cable (22, 422) can be extended from the hollow space.
20. Locking system according to claim 10,
    characterised in that
    the housing (7) has a bore (30) and that the latching unit (6, 106, 206, 306) has a pin (29), which enters the bore (30) when closing the two furniture elements (2, 102, 202, 302; 3, 103, 203, 303).
21. Locking system according to claim 20,
    characterised in that
    the pin (29) is formed conical at its end.
22. Locking system according to one of claims 1 to 21,
    characterised in that
    the locking system (4) comprises a control unit (23), which activates the movement of the locking piston (15) from the retreated releasing position into the pushed-out closing position and vice versa.
23. Locking system according to claim 22,
    characterised in that
    the control unit (23) comprises a time switch clock.
24. Locking system according to claim 22,
    characterised in that
    the control unit (23) comprises a transmitter (33) and a receiver (32), wherein the receiver (32) is arranged to the closing unit (5, 105, 205, 305) and for switching of the locking piston (15) can receive commands from the transmitter (33).
25. Locking system according to claim 22,
    characterised in that
    a plurality of latching units (5, 105, 205, 305) can be controlled together by one control unit (23).
26. Locking system according to claim 22,
    characterised in that
    the transmitter (33) and the receiver (32) communicate with each other on the basis of radio waves or infra-red waves.
27. Locking system according to claim 22,
    characterised in that
    the control unit (23) comprises means for checking the authorisation for switching of the locking piston (15).
28. Locking system according to claim 27,
    characterised in that
    the means for checking the authorisation are represented by a magnetic card reader, chip card reader, a key board or a finger print sensor.
29. Piece of furniture having a locking system according to one of claims 1 to 28,
    characterised in that
    the first furniture element (2, 102, 202) is formed as a sliding door, a swing door or a folding door and that the second furniture element (3, 103, 203) is formed as a body.
30. Piece of furniture having a locking system according to one of claims 1 to 28,
    characterised in that
    the first and second furniture element (302; 303) are formed as roller shutter doors or as folding doors.
31. Piece of furniture according to one of claims 29 or 30,
    characterised in that
    the same has a plurality of first furniture elements and a plurality of correspondingly fitting second furniture elements, wherein to each pair of first and second furniture elements a closing system according to one of claims 1 to 28 is arranged.

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