EP4063597B1 - Locking mechanism for a cooling chamber door - Google Patents

Description

• mit einer Falle
• mit einem Schließblech, in welches die Falle eingreift,
• einem Ausrückteil, mittels dessen die Falle aus dem Schließblech ausrückbar ist,
• mit einer Betätigungshandhabe, mittels derer das Ausrückteil ansteuerbar ist und die gleichfalls als Türgriff dient,
• mit einem Halteblock, in welchem die Betätigungshandhabe beweglich gelagert ist und die zur Anordnung der Betätigungshandhabe an einer Kühlraumtür dient, und
• mit einem Schließzylinder, der die Betätigungshandhabe arretiert, wobei
• der Halteblock einen Tubus trägt und die Betätigungshandhabe ebenfalls mit einem Tubus versehen ist, wobei beide Tuben teleskopähnlich ineinandergreifen,
• die ineinandergreifenden Tuben ein Führungslager bilden, welches die Linearbewegung der Betätigungshandhabe stabilisiert,
• eine Druckhandhabe mit dem Ausrückelement bewegungsgekoppelt ist, wobei die Druckhandhabe alternativ zur Betätigungshandhabe auf das Ausrückelement wirkt, wobei die Druckhandhabe lediglich linearbeweglich ist,
• die Betätigungshandhabe eine Zugstange aufweist, die mit dem Ausrückelement bewegungsgekoppelt ist und dass die Druckhandhabe in Achsverlängerung der Zugstange angeordnet ist, wobei die Achse der Linearbewegung von Betätigungshandhabe, Zugstange und Druckhandhabe zusammenfällt,
• die Betätigungshandhabe (13) ausschließlich linearbeweglich im Halteblock (17) gelagert ist und dass die Betätigungshandhabe (13) den Schließzylinder (29) trägt,
• die Bewegungskopplung zwischen Zugstange (23) und Ausrückelement (39) bei einer Betätigung der Druckhandhabe (18) aufgehoben ist.

The invention relates to a locking device for a refrigerator door

• with a trap
• with a striking plate into which the latch engages,
• a disengaging part, by means of which the latch can be disengaged from the striking plate,
• with an operating handle by means of which the release part can be controlled and which also serves as a door handle,
• with a holding block in which the operating handle is movably mounted and which is used to arrange the operating handle on a refrigerator door, and
• with a locking cylinder that locks the operating handle, whereby
• the holding block carries a tube and the operating handle is also provided with a tube, with both tubes interlocking like a telescope,
• the interlocking tubes form a guide bearing which stabilizes the linear movement of the operating handle,
• a pressure handle is motion-coupled to the release element, the pressure handle acting on the release element as an alternative to the actuation handle, the pressure handle being only linearly movable,
• the actuating handle has a pull rod which is movement-coupled to the release element and that the pressure handle is arranged in the axial extension of the pull rod, the axis of the linear movement of the actuating handle, pull rod and pressure handle coinciding,
• the actuating handle (13) is mounted in the holding block (17) in a linearly movable manner and that the actuating handle (13) carries the locking cylinder (29),
• the movement coupling between the pull rod (23) and the release element (39) is canceled when the pressure handle (18) is actuated.

Cold rooms are provided with an opening in the cold room wall that can be closed by a door. These doors swing outwards for safety reasons. The locking mechanism of such Doors consists of a latch that engages in a strike plate or engages behind the strike plate, with the door handle arranged on the outside of the door unlocking the latch seated in the strike plate in order to open the door. A lock can be used to block the actuating movement of the door handle to release the latch from the striking plate, preventing the door from being opened.

On the inside of the door there is usually no door handle in the classic sense, with which the door can be closed from the inside. Instead, there is an emergency release device on the inside of the door, with which the latch can be released from the strike plate from the inside of the door when the door is closed. Without exception, these are unlocking handles that react to pressure towards the outside of the door, in which the pressure actuation to release the latch from the striking plate simultaneously induces the door opening movement.

Push handles are known from the non-generic state of the art for room doors. are mentioned here US 2015/007620 A1 and US 2015/0145266 A1 . The handle parts are coupled to each other for movement via a rod. The rod disengages a latch from a striking plate using additional mechanical components. The mechanism for disengaging the latch, like the latch itself, is stored within the door leaf. The striking plate is located on a frame part facing the door leaf.

From the EP 0 237 421 B1 a locking device for a refrigerator door is known, which has a push button on the inside for unlocking and on the outside of the door there is a swivel handle arranged to release the latch from the striking plate. The latch and striking plate are on the outside here.

Out of DE 20 2004 016 708 U1 A solution is known in which the latch and striking plate are located on the inside of the door in the refrigerator compartment.

It is considered a significant disadvantage that the pivoting movement of the door handle to release the lock from the outside is opposite to the pivoting movement of the refrigerator door itself. The refrigerator door, which can be pivoted about a pivot axis on the door hinge side, requires an opposite opening movement that pivots away from the door hinge to unlock the door latch and strike plate.

This unlocking movement, which is in the opposite direction to the door opening direction, is perceived as unergonomic. It is therefore the object of the invention to create an ergonomically favorable and simplified locking mechanism for a refrigerator door.

• die Betätigungshandhabe in Form des außenliegenden Türgriffs ausschließlich linearbeweglich im Halteblock gelagert ist und dass die Betätigungshandhabe den Schließzylinder trägt
• die Bewegungskopplung zwischen Zugstange und Ausrückelement bei einer Betätigung der Druckhandhabe aufgehoben ist.

The object of the invention is solved by a locking mechanism with the features of claim 1, in particular with its characterizing features, according to which

• the operating handle in the form of the external door handle is mounted in the holding block so that it can move exclusively in a linear manner and that the operating handle carries the locking cylinder
• the movement coupling between the pull rod and the release element is canceled when the pressure handle is actuated.

The main advantage of the invention is that the operating handle - that is, in a preferred embodiment, the outside door handle - is now no longer pivoted against the door opening movement. Instead, the latch is released from the striking plate exclusively by a linear movement of the operating handle, in particular by a linear pulling movement. This pulling movement corresponds to the ergonomics of opening the door, as a person opening the door usually moves orthogonally to the door leaf directed force vector is generated to open a door and the resulting momentum then allows the door to open along its pivot axis. The movement of the operating handle against the direction of door opening, which is absurd from an ergonomic point of view, is eliminated.

Locking the door opening can be implemented particularly easily in that the tube on the holding block side has a locking recess for the locking bit of the locking cylinder, into which the locking bit is able to intervene in a way that blocks the linear movement of the operating handle.

In the invention it is provided that the actuation handle has a pull rod which is movement-coupled with the release element and that the pressure handle is arranged in the axial extension of the pull rod, the axis of the linear movement of the actuation handle, pull rod and pressure handle coinciding.

This design simplifies the locking mechanism significantly. For this purpose, it is in particular provided that the movement coupling between the pull rod and the release element is canceled when the pressure handle is actuated, in particular in that the release element is mounted on the pull rod in a relatively movable manner in the direction of the actuation handle.

It is particularly preferred if the release element is part of the pressure handle.

The invention also relates to a refrigerator door with a locking device, the actuating handle being arranged on the outside of the door at the front in the door opening direction and the pressure handle being arranged on the inside of the door, the pull rod passing through the door leaf.

The invention generally provides that the latch and the striking plate are arranged on the inside of the door.

Fig. 1:

die erfindungsgemäße Schließvorrichtung in Ansicht auf die Betätigungshandhabe als Teil einer Kühlraumtür,

Fig. 2:

eine Schnittdarstellung der Schließvorrichtung nach Fig. 1 entsprechend der Schnittlinie B-B,

Fig. 3:

eine Schnittdarstellung der Schließvorrichtung nach Fig. 1 entsprechend der Schnittlinie C-C,

Fig. 4:

eine vereinfachte Explosionsdarstellung der Schließvorrichtung nach Fig. 1.

A better understanding of the invention as well as further advantages result from the following description of an exemplary embodiment. Show it:

Fig. 1:

the locking device according to the invention in view of the operating handle as part of a refrigerator door,

Fig. 2:

a sectional view of the locking device Fig. 1 according to the cutting line BB,

Fig. 3:

a sectional view of the locking device Fig. 1 according to the cutting line CC,

Fig. 4:

a simplified exploded view of the locking device Fig. 1 .

In the figures, a locking device according to the invention is provided with the reference number 10 as a whole.

The locking device 10 is in Fig. 4 initially shown in the form of a schematic exploded view as part of a door leaf 11, of which only a section is shown. Fig. 4 also shows a section of a door frame.

On the outside of the door, the operating handle 13 of the locking device 10 is first shown in the form of a door handle, on the side facing the door leaf 11 an outer tube 14 is arranged. A cover rosette 15 covers the outside A of the door leaf 11 located fastening collar 16 of a holding block 17, which, however, is in Fig. 4 is not visible.

The pressure handle 18, which forms the inside emergency release system, is arranged on the inside of the door I. It initially comprises a holding pot 19 attached to the inside of the door I, in which the push button 20 is mounted so that it can be moved linearly. The holding pot 19 also accommodates the latch 21, which cooperates with a striking plate 22 that is attached to the door frame 12. A pull rod 23 couples the door handle 13 with the locking mechanism arranged in the handle 19.

Fig. 2 now shows the locking device 10 according to section line BB in Fig. 1 .

On the outside of the door A, the holding block 17 is first fixed by means of screws 24 engaging in its fastening collar 16, with the cover rosette 15 forming a visually appealing cover for the fastening collar 16.

The holding block 17 has an inner tube 25 in which the outer end of the pull rod 23 is initially stored.

The pull rod 23 carries at its outer end a coupling web 26, which is screw-fastened to the door handle 13. These are used for this purpose Fig. 3 screw bolts 27 shown, which engage in the cover cap 28 in the present exemplary embodiment. However, a different movement-coupled connection between the coupling web 26 or the pull rod 23 and the door handle 13 is possible as an alternative.

The inner tube 25, which is carried by the holding block 17 and points in the direction of the door handle 13, is received by the outer tube 14 of the door handle 13. The tubes 14, 25 are put together in a telescopic manner, so that the Inner tube 25 serves as a sliding bearing for a linear movement of the outer tube 14 and thus of the door handle 13.

The cover cap 28 of the door handle 13 carries a lock cylinder 29, which projects into the inner tube 25 with its end carrying the lock bit 30. The locking bit 30 is aligned with locking recesses 31 of the inner tube 25, so that the locking bit 30 engages in the locking recesses 31 when the locking cylinder 29 is locked and thus eliminates the relative mobility of the door handle 13 to the holding block 17, i.e. blocks the linear pulling movement of the door handle 13 relative to the holding block 17.

Fig. 2 shows on the inside of the door I the pressure handle, which is provided with the reference number 18, which represents the emergency release 18 on the inside of the refrigerator.

The holding pot 19 of the pressure handle 18 is also fixed to the door leaf 11 with screws 24 and forms a basket 32, which forms a central guide sleeve 33 in which the pull rod 23 is slidably mounted in a linearly movable manner. The basket 32 also accommodates a sliding cup 34. A coil spring 35 is arranged between the basket bottom 36 of the basket 32 and the cup bottom 37 of the sliding cup 34 and is penetrated by the pull rod 23. The sliding cup 34 is prevented from slipping out of the basket 32 by retaining screws 38, but can otherwise be moved towards the outside of the door A by building up a spring tension of the coil spring 35 within the basket 32.

The push button 20 sits in the holding pot 19 in a linearly movable manner and carries a release part 39 at its inner end, which acts on the latch 21. The release part 39 sits with its end on the inside of the door on the outside of the cup base 37 and receives the end of the pull rod 23 on the inside of the door. A coupling screw 40 attaches the push button 20 on the pull rod 23. Finally, the push button 20 forms a movement space 42 for the pull rod 23 and the coupling screw 40 connected to it in movement, which is covered in a visually appealing manner by a closure cap 41.

Fig. 3 , which was already briefly referred to above, now shows a sectional view according to section line CC in Fig. 1 . The changed cutting plane makes the following details clear: Fig. 2 not emerge. First of all, reference should be made to the operating handle/door handle 13, the outer tube 14 of which forms a receiving slot 43 in which the inner tube 25 of the holding block 17 sits, which significantly improves the telescopic guidance of the door handle 13 on the holding block 17.

You can also see how the latch 21 engages behind the striking plate 22 attached to the door frame 12 and thus prevents the door from opening to the outside A. The release part 39, which in the preferred embodiment is an integral part of the pushbutton 20, forms an inclined surface 44 which lies opposite a counter-slope 45 of the latch 21 and forms an inclined surface pairing with it. The latch 21 is mounted in the holding pot 19 in a relatively movable manner parallel to the inside of the door and is pressure-loaded in the closed position by a latch spring element 46, here in the form of a coil spring.

Based on Figures 2 and 3 The function of the locking device 10 can now be explained.

When the refrigerator door 11 is opened from the outside of the door A, the door handle 13 is pulled, which leads to the door handle 13 being displaced further outwards. The purely linear movement caused by this and guided by the tubes 14, 25 leads to a similar displacement the pull rod 23, which is coupled to the door handle 13, also outwards.

Since the pull rod 23 is connected with its inside end to the push button 20 in a tension-coupled manner, this is also displaced towards the outside of the door A. This also performs a purely linear movement. Here, the inclined surface 44 pushes the counter-slope 45 of the latch 21 out of the movement path of the disengaging part 39, which results in a retracting, i.e. opening or releasing movement of the latch 21 and releases its engagement in the striking plate 22. After the latch 21 is disengaged, i.e. released from the striking plate 22, a further pull on the door handle 13 leads to the opening of the door 11.

When using the door handle 13, there is a movement coupling between the internal push button 20 carrying the release part 39 and the external door handle 13, caused by their connection by means of the pull rod 23.

It is now easy to understand that closing the refrigerator door 11 by turning the locking cylinder 29 into its closed position and thus a rigid coupling of the tubes 14 and 25 through the locking bit 30 engaging in the locking recesses 31 prevents actuation of the release part 39 and thus the opening of the Refrigerator door 11 is prevented.

However, the refrigerator door 11 can be opened from the inside at any time using the pressure handle 18 or the so-called emergency release 18. A displacement of the push button 20 by moving it towards the outside of the door A obviously leads to a disengagement of the counter inclined surface 45 from the movement path of the push button 20 through the inclined surface 44 of the release part 39. As a result, the latch 21 is retracted and released from the striking plate 22, which opens the Door allows. The movement coupling between the pushbutton 20 and However, the pull rod 23 is canceled in this application. The inner end of the release part 39 only acts on the cup base 37 of the sliding cup 34, which is pushed into the basket 32, with a spring tension that is directed in the opposite direction to this outward movement A building up in the coil spring 35.

However, the pull rod 23, which is slidably mounted in the release part 39, does not experience any movement impulse towards the outside of the door A, since it is displaced together with the coupling screw 40 into the movement space 42 of the push button 20.

Consequently, the door 11 can be opened from the inside even if a displacement of the door handle 13 and the pull rod 23 rigidly coupled to it is prevented due to the locking cylinder 29 being in the closed position.

The coil spring 35 arranged between the basket bottom 36 and the cup bottom 37 is compressed when the door handle 13 or the push button 20 is used, building up restoring forces and moves both the door handle 13 and the push button 20 back to the starting position after the respective actuation.

The Figures 2 and 3 show that the door handle 13, the pull rod 23 and the push button 20 have a common unspecified axis of movement and are moved exclusively linearly between the inside of the door I and the outside of the door A. Disadvantageous pivoting movements, as are known from the prior art and are ergonomically unfavorable to carry out against the door opening movement, are avoided.

The coaxial position of the door handle 13 and the pressure handle 18 with its push button 20 allows the door handle to be arranged close to the striking plate Emergency release 18 and thus reduces the forces required to open the door. This is of considerable advantage, particularly if the door 11 needs to be opened from the inside in an emergency.

The integration of the release part 39 into the emergency release 18, in particular its integration into the push button 20, leads to a reduction in components and thus to a simply constructed, less error-prone locking device 10.

Reference symbol list

10

Locking device

11

door leaf

12

door frame

13

Operating handle/door handle

14

Outer tube

15

Deck rosette

16

Fastening collar

17

Holding block

18

Pressure handle / emergency release

19

holding pot

20

Push button

21

Cases

22

strike plate

23

pull bar

24

screw

25

inner tube

26

coupling bridge

27

screw bolt

28

Top cap

29

Lock cylinder

30

Lock beard

31

Locking recess

32

Basket

33

Guide sleeve

34

sliding cup

35

Coil spring

36

Basket bottom

37

Cup base

38

retaining screws

39

release part

40

coupling screw

41

Cap

42

Movement space

43

recording slot

44

inclined surface

45

Counter-slant

46

Trap spring element

A

Door outside

b

Inside of the door

Claims (6)

1. Lock device (10) of a cold room door (11)

   - having a latch (21),

   - having a strike plate (22) in which the latch (21) engages,

   - a release part (39), by means of which the latch (21) can be released from the strike plate (22),

   - having an operating handle (13), by means of which the release part (39) can be controlled and that also serves as a door handle (13),

   - having a holding block (17) in which the operating handle (13) is moveably mounted and that serves to arrange the operating handle (13) on a cold room door (11),

   - having a lock cylinder (29) that arrests the operating handle (13), wherein

   - the holding block (17) supports a tube and the operating handle (13) is also provided with a tube, wherein the two tubes (14, 25) engage in each other telescopically,

   - the tubes (14, 25) engaging in each other form a guide bearing that stabilises the linear movement of the operating handle (13),

   - the operating handle (13) is mounted in the holding block (17) such that it can only be moved in a linear manner and such that the operating handle (13) supports the lock cylinder (29),

   - a push handle (18) is motion-coupled with the release part (39), wherein the push handle (18) acts on the release part (39) as an alternative to the operating handle (13), wherein the push handle (18) can only be moved in a linear manner,

   characterised in that

   - the operating handle (13) has a pull rod (23) that is motion-coupled with the release part (39) and in that the push handle (18) is arranged in the axial extension of the pull rod (23), wherein the axes of the linear movement of the operating handle (13), pull rod (23) and push handle (18) coincide,

   - the motion coupling between the pull rod (23) and the release part (39) is cancelled when the push handle (18) is operated.
2. Lock device (10) according to claim 1, characterised in that the tube (25) on the holding block has a lock recess (31) for the lock bit (30) of the lock cylinder (29), in which the lock bit (30) can engage to block the linear movement of the operating handle (13).
3. Lock device (10) according to claim 1, characterised in that the release part (39) is mounted on the pull rod (23) such that it can be moved relative to it in the direction of the operating handle (13).
4. Lock device (10) according to claim 1, characterised in that the release part (39) is a component of the push handle (18).
5. Cool room door having a lock device according to one of claims 1 to 4, characterised in that the operating handle (13) is arranged on an outside A of the door located to the front in the opening direction of the door and the push handle (18) is arranged on a door inside I, wherein the pull rod (23) passes through the door leaf (11).
6. Cool room door according to claim 5, characterised in that the latch (21) and the strike plate (22) are arranged on the inside of the door.

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