DE102016122015B3 - Door lock for a cooking appliance - Google Patents

Abstract

Door closure (1) for a cooking appliance (100) such as a pyrolysefähigen oven with a latch (2) and with a locking hook (3), which are mounted on opposing components (101, 102) of the cooking appliance (100). The locking hook (3) is arranged in a hook housing (4), the hook housing (4) is submerged in the lock latch (2). The closing hook (3) is movable transversely to the immersion direction (5) out of the hook housing (4) into a closing position (6).

Description

The present invention relates to a door lock for a cooking appliance and in particular for a pyrolysis oven with a latch and a locking hook, which are mounted on opposing components of the cooking appliance. The invention also relates to a cooking appliance equipped with such a door lock.

With the EP 1 860 382 A2 a door lock for a household appliance with a locking pin and a latch has become known, wherein the locking pin between a closed position in which it locks with the latch bolt and the door is substantially close to the front frame of the body or a door seal disposed thereon and an open position, in which the door is not locked, is movable back and forth. The locking bolt is pivotally received on the body and is rotated for transfer between the closed position and the open position by about 90 °. This known prior art has a structure in which the drive motor drives a drive worm, which is coupled to a gear for pivoting the Schließklobens. This structure works basically but is relatively expensive.

From the US 2007/0090655 A1 a door lock for a pyrolysefähigen oven is known, which includes a latch and a lock latch, which are mounted on opposing components of the cooking appliance, wherein the lock hook is movable into a closed position.

It is therefore the object of the present invention to provide a further door lock for a cooking appliance and in particular for a pyrolysefähigen oven available, which in particular a simpler structure is possible.

This object is achieved by the door lock with the features of claim 1 and by the cooking appliance with the features of claim 12. Preferred developments of the invention are the subject of the dependent claims. Further advantages and features of the present invention will become apparent from the general description and the description of the embodiment.

An inventive door lock for a cooking appliance and in particular for a pyrolysefähigen oven has a latch and a latch on which are mounted on opposing components of the cooking appliance. In this case, the closing hook is arranged in a hook housing. The hook housing is plunged into the latch and the latch is movable transversely to the direction of immersion from the hook housing into a closed position.

The door lock according to the invention has many advantages. A significant advantage of the door lock according to the invention is that the hook housing is immersed in the latch bolt and that further the locking hook is transversely movable to the immersion direction from the hook housing into a closed position. A movement in the transverse direction is performed to move the locking hook in the closed position. In the cited prior art, however, a rotational movement about a horizontal axis was required to move the locking block from the horizontal arrangement by 90 ° down to the closed position.

In a preferred embodiment, the closing hook is laterally movable (in the installed state approximately parallel to the horizontal direction) out of the hook housing. Such a configuration requires little space and can cause a reliable locking of the closing hook on the latch by a relatively small movement of the closing hook.

It is preferred that the locking hook is pivotably received on or in the hook housing. In such an embodiment, the hook housing is at least partially immersed in the latch when the appliance door of the cooking appliance is closed. At the immersed hook housing, the locking hook can be pivoted out of the hook housing in the lateral direction in order to lock the door to the device housing.

In preferred embodiments, the hook housing comprises two housing parts, of which a housing part is designed as a hook housing lower part and a housing part as a hook housing upper part. In this case, one of the two housing parts is movable relative to the other housing part. Preferably, the movable housing part is the hook housing upper part.

Preferably, a plunger for engagement detection is formed on the movable housing part. In this case, the plunger is movable between a zero position and an engagement position. In the engaged position, the plunger is in engagement with the door, while the plunger is in the zero position out of engagement with the door, because the door is open. Characterized in that the plunger is connected to the movable housing part, takes place with the movement of the plunger directly also a movement of the housing part, so that a relative movement between the hook housing upper part and the hook housing lower part is generated.

Preferably, the plunger is biased by a preload unit in the zero position. As a result, the key is moved to the zero position when the appliance door is open, even if the appliance door was previously closed.

In preferred developments, the hook housing releases a movement of the closing hook into the closed position in the engaged position of the ram. This means that when the plunger is in the engaged position, the hook housing can be transferred to the closed position. In the closed position, in particular, a locking of the appliance door takes place on the appliance housing, so that the appliance door can not be opened again by a simple pulling operation on the appliance door. In this position, the plunger is in the engaged position and the hook housing is in engagement with the latch.

Preferably, a cantilever is integrally formed on the closing hook, which actuates a first switch in the closed position and / or which actuates a second switch in a release position. The first switch is used in particular for releasing the pyrolysis function in the case of a pyrolysis-capable oven or in the case of the pyrolysis-capable cooking appliance. For a pyrolysis process, it is necessary that the appliance door is locked in order to prevent accidental opening of the appliance door, while in the cooking chamber of the cooking appliance (still very high) temperatures prevail. The second switch is used in particular for detecting the release position in which the door is unlocked. Before the start of a pyrolysis operation, both switches are preferably interrogated, also to check the functionality of the first switch. Namely, the first switch can be operated only when the second switch is deactivated and vice versa. This means that when both switches are operated at the same time either at least one of the switches is defective or a mechanical, electrical or other fault exists. In such cases, a pyrolysis function can be deactivated and z. B. in a display of the cooking appliance a note will be issued.

In all embodiments, it is preferred that the closing hook is preloaded by means of a preload unit in the closed position.

Preferably, the hook housing lower part is integrally formed on a lock housing. Preferably, the lock housing is arranged on the device housing. The hook housing and / or the lock housing as a whole can be laterally variably attached to the component (in particular the device housing) in order to enable a centering of the hook housing on the latch.

Preferably, a motor driven cam unit is arranged in engagement with the arm of the closing hook on the lock housing and in particular fastened. In a first position of the cam unit movement of the closing hook is allowed in the closed position. When transferring the cam unit from the first position to a second position of the locking hook is transferred from the closed position to the release position. The cam unit is driven by the motor. A transfer of the closing hook into the closed position, when the drivable cam unit is in the first position, is ensured by the pre-loading unit, which acts in particular on the arm of the closing hook.

The cooking appliance according to the invention comprises in particular a pyrolysis-capable oven or is designed as such and comprises a door lock with a latch and a locking hook, which are mounted on opposing components of the cooking appliance, one of the components as a device housing and the other of the components designed as a door is. The door can be closed with the door lock. The locking hook is arranged in a hook housing and the hook housing is submerged in the lock latch. The locking hook can be moved out of the hook housing transversely to the immersion direction.

The cooking appliance according to the invention also offers many advantages. It allows a simple construction of the door lock, which is flexible, requires little space and is inexpensive to produce.

Preferably, the door lock is mounted on a device housing of the cooking appliance and the lock latch is mounted on the appliance door. Preferably, the door lock is spring-mounted on the device housing. This component tolerances can be compensated and the hook housing finds even with a slightly offset installation in the latch. This is the case in particular when the lock catch comprises a funnel-shaped immersion opening. In this case, a narrow side of the funnel-shaped immersion opening is slightly wider than the hook housing. By slightly wider, it is meant here that the narrow side is, for example, 0.5% or 1% or 2% or 3% or 5% or 10% wider than the hook housing.

In all embodiments, it is preferred that the appliance door is pivotable about a horizontal axis. It is also preferable that the lock hook is movable in a horizontal direction between a lock position and a release position. In this case, the closing hook can perform a linear movement. Possible and particularly preferred is that the closing hook a Pivoting movement about a substantially vertical axis, wherein the locking portion of the closing hook approximately performs a linear movement.

Overall, the invention provides a door lock for a cooking appliance and in particular for a pyrolysefähigen oven, with a locking hook arranged in a hook housing and the hook housing is plunged into a latch. The closing hook or a locking section of the closing hook can be moved laterally out of the hook housing transversely to the direction of insertion. For this purpose, the closing hook is preferably mounted pivotably on the hook housing. A rotational movement of the closing hook can take place via a motor driven cam unit. An integrally formed on the catch boom actuates in the closed position a first switch (pyrolysis) and actuates with the door open in the release position, a second switch. In this case, a redundancy is preferably considered during operation or both switches are evaluated before a pyrolysis function is released. The hook housing consists in particular of two housing parts, wherein on a movable and biased in an extended position housing part, a plunger is formed, which is pushed back when the door is closed, while the plunger extends when the door is open. When the door is open and the plunger is extended, a transfer of the closing hook into the closed position is preferably blocked.

Further advantages and features of the present invention will become apparent from the embodiment, which will be explained below with reference to the accompanying figures.

Show:

1 a schematic perspective view of a cooking appliance according to the invention;

2 a schematic perspective view of a door lock according to the invention;

3 an exploded view of the door lock according to 2 ;

4a a plan view of the door lock according to 2 in the zero position;

4b a sectional view of 4a ;

5a a plan view of the door lock according to 2 with the door closed;

5b a cross section through the illustration after 5a ;

6a a plan view of the door lock according to 2 in a closed position; and

6b the door lock after 6a in cross section.

In the accompanying figures is an inventive and equipped with a pyrolysis oven equipped cooking appliance 100 shown, wherein the cooking appliance 100 via a door lock according to the invention 1 features. The cooking appliance 100 has a cooking space 104 in a component designed as a device housing 101 , The cooking space 104 is made by a component designed as a door 102 locked. At the cooking appliance 100 can still be provided various displays and controls.

2 shows the door lock according to the invention 1 of the cooking appliance 100 in a schematic and enlarged view. From the appliance door 102 here is only the door cover strip 105 at the top of the appliance door 102 shown. The door lock 1 includes the on the appliance door 102 trained lock latch 2 and on a lock housing 20 arranged closing hooks 3 ,

The locking hook 3 is in a hook housing 4 added. The hook housing 4 dives into the latch when closing the door 2 one. In the immersed state is the closing hook 3 transverse to the immersion direction 5 from the hook housing 4 out in the in 2 illustrated closure position 6 movable. About a motor 18 can the closing hook from the illustrated closed position 6 in a release position 16 be transferred. switch 13 and 14 serve to detect different positions of the closing hook 3 ,

3 shows an enlarged exploded view of the door lock 1 , where as the lowest component, the lock housing 20 you can see. The lock case 20 also forms part of the hook housing 4 which is out here 2 Housing parts exists, namely the fixed base 7 and the relatively movable upper part 8th , In the assembled state is in the through the lower part 7 and through the top 8th formed hook housing the closing hook 3 added. The locking hook 3 has at the front end on a locking portion 32 in the closed position 6 sideways through the breakthrough 31 in the lower part 7 exits to lock the door to the device housing.

The locking hook 3 is about a pivot point 25 pivotable on the hook housing 4 or the lock housing 20 added.

The top 8th of the hook housing 4 is caused by the biasing unit designed as a helical compression spring 12 preloaded into an extended position. At the top 8th of the hook housing 4 is a pestle at the front end 9 formed by the preload unit 12 is biased in the extended position and in the extended position through the opening 30 in the lower part 7 from the hook housing 4 exit to the front.

The locking hook 3 has at the the locking portion 32 opposite end of a boom 17 on, which activates the first switch 13 or the second switch 14 serves. The first switch 13 is activated when the lock hook 3 in the closed position 6 located and the locking portion 32 the latch 2 locked. The second switch 14 is activated when the lock hook 3 in the release position 16 and thus the appliance door of the cooking appliance can be opened.

A transfer of the closing hook 3 in the closed position 6 is only possible in the retracted state of the hook housing when the upper part 8th against the force of the preload unit 12 was pushed back by closing the door. Only then can the edge 28 on the boom 17 on the edge 29 at the top 8th of the hook housing 4 over in the hook housing 4 immerse and thus a pivoting of the closing hook 3 in the closed position 6 enable.

With reference to the 4 to 6 is the function of the door lock according to the invention in the following 1 based on the in 4 illustrated zero position (open door), the in 5 illustrated state with closed door and the in 6 illustrated state with closed door and the closing hook in the closed position explained.

4a shows a plan view and 4b an associated cross section through the door lock 1 showing the condition when the appliance door is open. Then there is the pestle 9 in the zero position, in which he by the preload unit 12 is preloaded. The ram is extended. This blocks the edge 29 at the top 8th of the hook housing 4 a pivoting of the closing hook 3 because the edge 28 on the boom 17 through the edge 29 is blocked. The second switch 14 is pressed.

In 5a the state is shown with the door closed while 5b again a cross section 5a shows. By closing the door is the hook housing 4 in the lock trap 2 dipped and the pestle 9 is from the extended zero position 10 in the retracted engagement position 11 pushed back. As the pestle 9 with the shell 8th of the hook housing 4 is connected, is also the upper part 8th reduced in a corresponding extent. This will cause a pivoting of the closing hook 3 basically released as the edge 29 so far back that is the edge 28 no longer blocked and thus allows a pivoting of the boom. A pivoting of the closing hook 3 but in this state still by the cam unit 19 blocked, over the engine 18 is rotatably driven.

The appliance door 102 is in the position after 5a Although closed, but is not locked and can be opened at any time by the user.

6a shows the state in the pyrolysis position at which the appliance door 102 is closed and the lock hook 3 in the closed position 6 located. In this position is the cam unit 19 in the first position 21 , By turning the cam unit 19 becomes the boom 17 and thus the entire closing hook 3 back to the second position 22 out 5b panned back. The pivoting takes place against the force of the running as a helical compression spring bias unit 15 that the boom 17 in the closed position 6 preloaded.

The locking hook 3 is around the pivot point 25 pivotable.

In the 5 and 6 is also the funnel-shaped immersion opening 23 to recognize the lock latch. It can also be seen that the narrow side 24 only slightly wider than the hook housing is designed so that a self-centering of the hook housing 4 or the lock housing 20 when immersed in the lock latch 2 is carried out. As a result, tolerances can be compensated.

In the cooking appliance shown here 100 is a pyrolysis oven or it includes such. The door lock serves to protect the user, since during pyrolysis very high temperatures occur in the cooking chamber. The door is closed when carrying out the pyrolysis function so that it rests against the front frame or the door seal of the device housing. When the user selects the pyrolysis mode, it first checks to see if the ram 9 in the engaged position 11 is located and thus the door is closed. The motor designed as a synchronous motor 18 is activated and in the in 6 illustrated first position 21 proceed, causing the on the boom 17 acting preload unit 15 the closing hook 3 in the closed position 6 transferred. As a result, the door is locked to the device housing. The motor 18 The cam unit can also rotate when the plunger 9 not in the engaged position. But then a pivoting of the closing hook mechanically (see above) is prevented, so that no release takes place.

After carrying out the pyrolysis process and a cooling of the cooking chamber 104 to a permissible temperature range, the engine 18 re-activated and the cam unit 19 so long (in one direction or the other) rotated until the in 5 illustrated second position 22 is reached, in which the second switch 14 is activated after the first switch 13 already been released. Then the program sequence can be stopped.

LIST OF REFERENCE NUMBERS

1

 door lock

2

 latch

3

 hasp

4

 hook housing

5

 Immersion direction

6

 closed position

7

 Housing part, lower part

8th

 Housing part, upper part

9

 tappet

10

 zeroing

11

 engagement position

12

Preload unit for 9

13

 first switch (pyrolysis release)

14

 second switch (zero position detection)

15

Preload unit for 4 , Feather

16

 release position

17

 Boom (switching arm)

18

 Motor, synchronous motor

19

 cam unit

20

 lock housing

21

first position of 19

22

second position of 19

23

 funnel-shaped immersion opening

24

 narrow side

25

 pivot point

26

 transversely

27

Contour in 8th

28

Edge on 17

29

Edge on 8th

30

Breakthrough for 9

31

Breakthrough for 3

32

 locking section

100

Cooking appliance for 3

101

 Component, device housing

102

 Component, appliance door

103

 horizontal axis

104

 oven

105

 Türabdeckleiste

Claims (16)

Door lock ( 1 ) for a cooking appliance ( 100 ), in particular for a pyrolysefähigen oven, with a latch ( 2 ) and with a closing hook ( 3 ), on opposing components ( 101 . 102 ) of the cooking appliance ( 100 ), characterized in that the closing hook ( 3 ) in a hook housing ( 4 ) is arranged, and that the hook housing ( 4 ) in the lock latch ( 2 ) is submersible, and that the closing hook ( 3 ) transverse to the immersion direction ( 5 ) from the hook housing ( 4 ) out into a closed position ( 6 ) is movable. Door lock ( 1 ) according to claim 1, wherein the locking hook ( 3 ) laterally from the hook housing ( 4 ) is movable. Door lock ( 1 ) according to one of the preceding claims, wherein the locking hook ( 3 ) pivotable on the hook housing ( 4 ) is recorded. Door lock ( 1 ) according to one of the preceding claims, wherein the hook housing ( 4 ) two housing parts ( 7 . 8th ), of which a housing part as a hook housing lower part ( 7 ) and a housing part as a hook housing upper part ( 8th ) is formed, wherein one of the two housing parts ( 7 . 8th ) relative to the other housing part ( 8th . 7 ) is movable. Door lock ( 1 ) according to the preceding claim, wherein on the movable housing part ( 8th ) a pestle ( 9 ) is designed for engagement detection and wherein the plunger ( 9 ) between a zero position ( 10 ) and an engaged position ( 11 ) is movable. Door lock ( 1 ) according to the preceding claim, wherein the plunger ( 9 ) by a preloading unit ( 12 ) in the zero position ( 10 ) is preloaded. Door lock ( 1 ) according to one of the two preceding claims, wherein in the engaged position ( 11 ) of the plunger ( 9 ) the hook housing ( 4 ) a movement of the closing hook ( 3 ) in the closed position ( 6 ) releases. Door lock ( 1 ) according to the preceding claim, wherein a boom ( 17 ) on the closing hook ( 3 ) is formed, which in the closed position ( 6 ) a first switch ( 13 ) and / or which in a release position ( 16 ) a second switch ( 14 ). Door lock ( 1 ) according to one of the preceding claims, wherein the locking hook ( 3 ) by means of a preloading unit ( 15 ) in the closed position ( 6 ) is preloaded. Door lock ( 1 ) according to one of the preceding claims, wherein the hook housing lower part ( 7 ) on a lock housing ( 20 ) is formed. Door lock ( 1 ) according to the preceding claim, wherein one with a motor ( 18 ) drivable cam unit ( 19 ) in engagement with the boom ( 17 ) of the closing hook ( 3 ) on the lock housing ( 20 ) and in a first position ( 21 ) a movement of the closing hook ( 3 ) in the closed position ( 6 ) and when transferring the cam unit ( 19 ) from the first position ( 21 ) into a second position ( 22 ) the closing hook ( 3 ) from the closed position ( 6 ) into the release position ( 16 ). Cooking appliance ( 100 ), in particular pyrolysefähiger oven, with a door lock ( 1 ) with a latch ( 2 ) and with a closing hook ( 3 ), on opposing components ( 101 . 102 ) of the cooking appliance ( 100 ), wherein one of the components ( 101 . 102 ) as a device housing ( 101 ) and the other of the components as a door ( 102 ), wherein the appliance door ( 102 ) with the door lock ( 1 ) is closable, characterized in that the closing hook ( 3 ) in a hook housing ( 4 ) is arranged, and that the hook housing ( 4 ) in the lock latch ( 2 ) is submersible, and that the closing hook ( 3 ) transverse to the immersion direction ( 5 ) from the hook housing ( 4 ) is movable out. Cooking appliance ( 100 ) according to the preceding claim, wherein the door lock ( 1 ) on the device housing ( 101 ) of the cooking appliance ( 100 ) and wherein the latch ( 2 ) on the appliance door ( 102 ) is stored. Cooking appliance ( 100 ) according to one of the two preceding claims, wherein the door lock ( 1 ) on the device housing ( 101 ) is spring-mounted. Cooking appliance ( 100 ) according to one of the three preceding claims, wherein the lock latch ( 2 ) a funnel-shaped immersion opening ( 23 ), wherein a narrow side ( 24 ) of the funnel-shaped immersion opening ( 23 ) slightly wider than the hook housing ( 4 ). Cooking appliance ( 100 ) according to one of the three preceding claims, wherein the appliance door ( 102 ) about a horizontal axis ( 103 ) is pivotable and / or wherein the locking hook ( 3 ) in a horizontal direction between a closed position ( 6 ) and a release order ( 16 ) is movable.

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