EP3324126A1 - Door lock for a cooking device - 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 closing hook (3) is arranged in a hook housing (4), the hook housing (4) is submerged in the lock catch (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.

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 transversely to the immersion direction of the hook housing out in a closed position is movable. 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 takes place in particular a locking of the door to the device housing, so that the door does not by a simple pulling can be opened again 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 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 pyrolytic oven or is designed as such and comprises a door lock with a latch and with a closing hook which are mounted on opposing components of the cooking appliance, wherein one of the components is designed as a device housing and the other of the components as a device door. 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. It is possible and particularly preferred that the closing hook performs 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 in an extended position preloaded housing part, a plunger is formed, which is pushed back when the door is closed, while the plunger at opened door. 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.

Figur 1

eine schematische perspektivische Ansicht eines erfindungsgemäßen Gargeräts;

Figur 2

eine schematische perspektivische Ansicht eines erfindungsgemäßen Türverschlusses;

Figur 3

eine Explosionsdarstellung des Türverschlusses gemäß Figur 2;

Figur 4a

eine Draufsicht auf den Türverschluss gemäß Figur 2 in der Nullstellung;

Figur 4b

eine geschnittene Darstellung von Figur 4a;

Figur 5a

eine Draufsicht auf den Türverschluss gemäß Figur 2 bei geschlossener Tür;

Figur 5b

einen Querschnitt durch die Darstellung nach Figur 5a;

Figur 6a

eine Draufsicht auf den Türverschluss gemäß Figur 2 in einer Verschlussstellung; und

Figur 6b

den Türverschluss nach Figur 6a im Querschnitt.

Show:

FIG. 1

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

FIG. 2

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

FIG. 3

an exploded view of the door lock according to FIG. 2 ;

FIG. 4a

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

FIG. 4b

a sectional view of FIG. 4a ;

FIG. 5a

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

FIG. 5b

a cross section through the illustration after FIG. 5a ;

FIG. 6a

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

FIG. 6b

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

In the accompanying figures, an inventive and equipped with a pyrolysefähigen oven cooking appliance 100 is shown, wherein the cooking appliance 100 has a door lock 1 according to the invention. The cooking appliance 100 has a cooking chamber 104 in a component 101 designed as a device housing. The cooking chamber 104 is closed by a component 102 designed as a device door. On the cooking appliance 100 can still be provided various displays and adjustment elements.

FIG. 2 shows the door lock 1 according to the invention of the cooking appliance 100 in a schematic and enlarged view. Of the appliance door 102, only the door cover strip 105 is shown here at the upper end of the appliance door 102. The door lock 1 comprises the latch 2 formed on the appliance door 102 and the locking hook 3 arranged on a lock housing 20.

The locking hook 3 is received in a hook housing 4. The hook case 4 dives when closing the door into the latch 2 a. In the immersed state of the locking hook 3 is transverse to the immersion direction 5 from the hook housing 4 out in the in figure 2 shown closure position 6 movable. The closing hook can be transferred from the closed position 6 shown in a release position 16 via a motor 18. Switches 13 and 14 are used to detect different positions of the closing hook. 3

FIG. 3 shows an enlarged exploded view of the door closure 1, wherein the lock housing 20 can be seen as the lowest component. The lock housing 20 also forms part of the hook housing 4, which here consists of 2 housing parts, namely the fixed lower part 7 and the relatively movable upper part 8. In the assembled state, the closing hook is formed in the hook housing formed by the lower part 7 and by the upper part 8 3 recorded. The locking hook 3 has at the front end via a locking portion 32 which exits in the closed position 6 laterally through the opening 31 in the lower part 7 to lock the door to the device housing.

The locking hook 3 is pivotally received about a pivot point 25 on the hook housing 4 and the lock housing 20.

The upper part 8 of the hook housing 4 is biased by the biasing unit 12 designed as a helical compression spring in an extended position. On the upper part 8 of the hook housing 4, a plunger 9 is formed at the front end, which is biased by the preload unit 12 in the extended position and in the extended position through the opening 30 in the lower part 7 from the hook housing 4 leaking forward.

The closing hook 3 has, at the end opposite the locking section 32, a boom 17 which serves to activate the first switch 13 or the second switch 14. The first switch 13 is actuated when the locking hook 3 is in the closed position 6 and the locking portion 32 locks the latch 2. The second switch 14 is actuated when the locking hook 3 is 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 made possible only in the retracted state of the hook housing, when the upper part 8 was pushed back against the force of the preload unit 12 by closing the door. Only then can the edge 28 on the boom 17 on the edge 29 on the upper part 8 of the hook housing 4 pass into the hook housing 4 and thus allow a pivoting of the closing hook 3 in the closed position 6.

With reference to the FIGS. 4 to 6 In the following, the function of the door lock 1 according to the invention will be described with reference to FIGS FIG. 4 illustrated zero position (open door), the in FIG. 5 illustrated state with closed door and the in FIG. 6 illustrated state with closed door and the closing hook in the closed position explained.

FIG. 4a shows a plan view and FIG. 4b an associated cross section through the door lock 1, wherein the state is shown when the door is open. Then the plunger 9 is in the zero position, in which it is biased by the preload unit 12. The ram is extended. As a result, the edge 29 on the upper part 8 of the hook housing 4 blocks a pivoting of the closing hook 3, since the edge 28 on the boom 17 is blocked by the edge 29. The second switch 14 is actuated.

In FIG. 5a the state is shown with the door closed while FIG. 5b again a cross section FIG. 5a shows. By closing the door, the hook housing 4 is immersed in the latch 2 and the plunger 9 is pushed back from the extended zero position 10 in the retracted engagement position 11. Since the plunger 9 is connected to the upper part 8 of the hook housing 4, the upper part 8 is moved back in a corresponding extent. As a result, a pivoting of the closing hook 3 is basically released, since the edge 29 is moved back far enough that it no longer blocks the edge 28 and thus allows a pivoting of the boom. A pivoting of the closing hook 3 is blocked in this state but still by the cam unit 19 which is rotatably driven via the motor 18.

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

FIG. 6a shows the state in the pyrolysis, in which the appliance door 102 is closed and the locking hook 3 is in the closed position 6. In this position, the cam unit 19 is in the first position 21. By rotation of the cam unit 19, the boom 17 and thus the entire closing hook 3 is again in the second position 22 from FIG. 5b panned back. The pivoting takes place against the force of the biasing unit 15 designed as a helical compression spring, which pre-loads the boom 17 into the closed position 6.

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

In the FIGS. 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 is configured only slightly wider than the hook housing, so that a self-centering of the hook housing 4 and the lock housing 20 when immersed in the lock latch 2 is performed. As a result, tolerances can be compensated.

In the cooking appliance 100 shown here 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 door seal of the device housing is applied. If the user selects the pyrolysis mode, it is first checked whether the plunger 9 is in the engaged position 11 and thus the door is closed. The designed as a synchronous motor motor 18 is activated and in the in FIG. 6 shown first position 21 method, whereby the force acting on the boom 17 preload unit 15 transfers the locking hooks 3 in the closed position 6. As a result, the door is locked to the device housing. The motor 18 may also rotate the cam unit when the plunger 9 is 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 performing the pyrolysis operation and a cooling of the cooking chamber 104 to a permissible temperature range of the motor 18 is reactivated and the cam unit 19 so long (in one or the other direction) rotated until the in FIG. 5 shown second position 22 is reached, in which the second switch 14 is activated after the first switch 13 has already been released. Then the program sequence can be stopped. LIST OF REFERENCE NUMBERS 1 door lock 20 lock housing 2 latch 21 first position of 19 3 hasp 22 second position 19 4 hook housing 23 funnel-shaped immersion opening 5 Immersion direction 24 narrow side 6 closed position 25 pivot point 7 Housing part, lower part 26 transversely 8th Housing part, upper part 27 Contour in 8 9 tappet 28 Edge at 17 10 zeroing 29 Edge at 8 11 engagement position 30 Breakthrough for 9 12 Preload unit for 9 31 Breakthrough for 3 13 first switch (pyrolysis release) 32 locking section 14 second switch (zero position detection) 100 Cooking device for 3 101 Component, device housing 15 Preload unit for 4, spring 102 Component, appliance door 16 release position 103 horizontal axis 17 Boom (switching arm) 104 oven 18 Motor, synchronous motor 105 Türabdeckleiste 19 cam unit

Claims (16)

Door closure (1) for a cooking appliance (100), in particular for a pyrolysis-capable oven, with a latch (2) and with a closing hook (3) which are mounted on opposing components (101, 102) of the cooking appliance (100),
characterized,
in that the closing hook (3) is arranged in a hook housing (4), and in that the hook housing (4) can be inserted into the lock catch (2), and that the closing hook (3) extends out of the hook housing (4) transversely to the direction of insertion (5) ) is movable out into a closed position (6). Door closure (1) according to claim 1, wherein the locking hook (3) laterally from the hook housing (4) is movable. Door closure (1) according to one of the preceding claims, wherein the locking hook (3) is pivotally accommodated on the hook housing (4). Door closure (1) according to one of the preceding claims, wherein the hook housing (4) comprises two housing parts (7, 8), of which a housing part as a hook housing lower part (7) and a housing part as a hook housing upper part (8) is formed, wherein one of the two housing parts (7, 8) relative to the other housing part (8, 7) is movable. Door closure (1) according to the preceding claim, wherein on the movable housing part (8), a plunger (9) is formed for engagement detection and wherein the plunger (9) between a zero position (10) and an engagement position (11) is movable. Door closure (1) according to the preceding claim, wherein the plunger (9) is biased by a biasing unit (12) in the zero position (10). Door closure (1) according to one of the two preceding claims, wherein in the engaged position (11) of the plunger (9), the hook housing (4) releases a movement of the closing hook (3) in the closed position (6). Door closure (1) according to the preceding claim, wherein a cantilever (17) is integrally formed on the closing hook (3), which actuates a first switch (13) in the closed position (6) and / or which in a release position (16) has a second one Switch (14) actuated. Door closure (1) according to any one of the preceding claims, wherein the locking hook (4) by means of a biasing unit (15) is biased in the closed position (6). Door closure (1) according to one of the preceding claims, wherein the hook housing lower part (7) on a lock housing (20) is integrally formed. Door closure (1) according to the preceding claim, wherein a cam unit (19) which can be driven by a motor (18) is arranged in engagement with the arm (17) of the closing hook (4) on the lock housing (20) and in a first position (21 ) allows movement of the shooting hook (4) in the closed position (6) and upon transfer of the cam unit (19) from the first position (21) to a second position (22) the shooting hook (4) from the closed position (6), in the release position (16) transferred. Cooking appliance (100), in particular pyrolysefähiger oven, with a door lock (1) with a latch (2) and with a closing hook (3), which are mounted on opposing components (101, 102) of the cooking appliance (100), wherein one of Components (101, 102) as a device housing (101) and the other of the components as a device door (102) is formed, wherein the appliance door (102) with the door lock (1) is closable,
characterized,
in that the closing hook (3) is arranged in a hook housing (4), and in that the hook housing (4) can be inserted into the lock catch (2), and that the closing hook (3) extends out of the hook housing (4) transversely to the direction of insertion (5) ) is movable out. Cooking appliance (100) according to the preceding claim, wherein the door lock (1) is mounted on the appliance housing (101) of the cooking appliance (100) and wherein the lock latch (2) is mounted on the appliance door (102). Cooking appliance (100) according to one of the two preceding claims, wherein the door lock (1) on the appliance housing (101) is resiliently mounted. Cooking appliance (100) according to one of the three preceding claims, wherein the lock latch (2) comprises a funnel-shaped immersion opening (23), wherein a narrow side (24) of the funnel-shaped immersion opening (23) is 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 position (16 ) is movable.

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