EP2370737B1

EP2370737B1 - An oven comprising a lock

Info

Publication number: EP2370737B1
Application number: EP09799584.9A
Authority: EP
Inventors: Serdar Turkoz; Yalcin Yaman
Original assignee: Arcelik AS
Current assignee: Arcelik AS
Priority date: 2008-12-30
Filing date: 2009-12-09
Publication date: 2016-07-20
Anticipated expiration: 2029-12-09
Also published as: EP2370737A2; WO2010076133A2; WO2010076133A3

Description

The present invention relates to an oven comprising a lock.
Ovens, generally, comprise at least one cooking chamber wherein foods are cooked. The opening located in front of the cooking chamber is closed by a door. In order that the cooking chamber can be cleaned, some ovens are heated up to high temperatures and thus, oil and pieces of, for example, food inside are provided to be burnt. The burnt and carbonized leftovers can be easily cleaned by being wiped off. This process is known as pyrolytic cleaning. The doors of pyrolytic ovens should not be opened at high temperatures for user safety. Various locks have been developed in the prior art to provide this.
In the state of the art German Patent Application No DE102004061231 , a lock suitable for using in ovens wherein pyrolytic cleaning is performed is explained. In this embodiment, locking is provided by the seating of a latch hook, which moves up and down as a result of the movement transmitted from the motor by means of gears, into the housing on the oven door.
In another state of the art document, the European Patent No EP1860382 , a lock suitable for using in ovens wherein pyrolytic cleaning is performed is explained. In this embodiment, by a complex spring gear mechanism, the movement is transmitted from the motor to the locking device.
Document DE 102006024899 discloses further state of the art relevant to the invention.
The aim of the present invention is the realization of an oven which comprises a lock that is easily mounted and wherein pyrolytic cleaning is performed.
The oven realized in order to attain the aim of the present invention is explicated in the claims.
The oven comprises a lock providing the door to be locked when required in order to prevent it from opening, and the door comprises a lock pair providing the lock to keep the door in the closed position.
The lock comprises a retaining member having a locking position wherein the retaining member cooperates with the lock pair and thus, the door is provided to be locked such that it will be prevented from opening, and a free position wherein the retaining member is separated from the lock pair and thus, enables the door to be opened. The retaining member is formed as a shaft and moves between the free position and the locking position by rotating around its own axis.
The lock, furthermore, comprises an actuating means providing the retaining member to be rotated around its own axis in order to provide its movement between the locking position and the free position. Since the angling of the door will be prevented by means of the actuating means, the retaining member is rotated around its own axis and is changed from the free position to the locking position.
The lock, furthermore, comprises a casing whereon the retaining member and the actuating means are disposed. By means of the casing, the retaining member, the actuating means and the switch are brought together and are fixed to the front wall at a time.
The casing comprises a bearing wherein the retaining member is disposed and which guides the movement of the retaining member during its rotational movement.
The lock comprises a switch which transmits the data of the retaining member whether the door can be opened or not by being activated. The switch, which is triggered preferably by the movement of the retaining member, transmits the data that the door can be opened when the retaining member is in the free position and that the door is locked and, therefore, cannot be opened when the retaining member is in the locking position.
The retaining member comprises a latch which, in the locking position, cooperates with the lock pair and provides locking, and which, when brought to the free position by being rotated, is released from the lock pair and enables the door to be opened. The latch is located at the retaining member end that is near the door, and is preferably formed as an extension that is almost vertical to the rotational axis.
The top of the bearing is open such that it will enable the retaining member to be disposed therein. The retaining member extends preferably almost in the horizontal axis. The bearing bears the retaining member by grasping it from below.
The casing comprises a first stopper which is located inside the bearing and against which the retaining member leans when it comes to the free position and thus, which stops the movement, and a second stopper against which the retaining member leans when it comes to the locking position and thus, which stops the movement.
The retaining member comprises a first leaning member which leans against the first stopper when the retaining member comes to the free position, and a second leaning member which leans against the second stopper when the retaining member comes to the locking position.
The casing, furthermore, comprises

a body whereon the bearing is located and
a head which is connected to the body and which has a shape locking chamber wherein the actuating means and the retaining member are connected shape-lockingly.

The head is located after the bearing. The actuating means is mounted on the head and, at the same time, at least partially extends into the shape locking chamber and is clamped together with the end of the retaining member here. Thus, movement transmission between the actuating means and the retaining member is provided.
The casing comprises at least one fixing means enabling the casing to be fixed to the front wall. The fixing means is located preferably on the body and is formed as an opening which is aligned with the hole located on the front wall. In this embodiment, the oven, furthermore, comprises a screw-shaped mounting member. The mounting of the lock to the front wall is provided by the mounting member being passed through the fixing means and the hole located in alignment with the fixing means.
In different embodiments of the present invention, the fixing means is formed as, for example, detent means and protrusion such that it will provide the casing to be fixed shape-lockingly to the front wall.
The oven comprises an outer cabinet wherein the cooking chamber is positioned and which has two side walls. In an embodiment of the present invention, the casing comprises at least one leg extending from the body towards the side wall and at least one connection member located at the leg portion which contacts the side wall and enabling the casing to be fixed also onto the side wall.
The connection member is formed as a screw hole and by means of a mounting member, the lock is provided to be fixed to the side wall or the connection member is a hook-shaped extension and provides the casing to be hung on the side wall. In the embodiment wherein the connection member is hook-shaped, the side wall comprises a housing wherein the connection member is seated.
The lock, furthermore, comprises a grasp which grasps the retaining member by partially surrounding it from above. The grasp is shape-locked to the casing from one end and fixed by means of a mounting member such as screw from the other end.
By means of the present invention, the lock is provided to be mounted onto the front wall and/or the side wall easily and at a time, and at the same time, a lock with high locking precision is provided.
The model embodiments that relate to the oven realized in order to attain the aim of the present invention are illustrated in the attached figures, where:

Figure 1 - is the front perspective view of an oven.
Figure 2 - is the open top, front perspective view of an oven.
Figure 3 - is the view of detail A in Figure 1.
Figure 4 - is the top perspective view of the lock.
Figure 5 - is the bottom perspective view of the lock.
Figure 6 - is the exploded view of the lock.

The elements illustrated in the figures are numbered as follows:

1.: Oven
2.: Cooking chamber
3.: Front wall
4.: Opening
5.: Door
6.: Lock
7.: Retaining member
8.: Actuating means
9.: Switch
10.: Casing
11.: Body
12.: Bearing
13.: First stopper
14.: Second stopper
15.: First leaning member
16.: Second leaning member
17.: Head
18.: Shape locking chamber
19.: Lock pair
20.: Latch
21.: Fixing means
22.: 122. 222. Mounting member
23.: Side wall
24.: Leg
25.: Connection member
26.: Grasp

The oven (1) comprises a cooking chamber (2) wherein foods to be cooked are disposed, a front wall (3) which is frame-shaped and has an opening (4) at its center, and which closes the front side of the cooking chamber (2) such that the cooking chamber (2) will be able to be accessed through the opening (4), a door (5) which closes the opening (4) and a lock (6) which provides the door (5) to be locked when required in order to prevent it from opening (Figure 1 and Figure 2).
The door (5) comprises a lock pair (19) providing the lock (6) to keep the door (5) in the closed position (Figure 3).
The lock (6) comprises

a shaft-shaped retaining member (7) which, when the door (5) is in the closed position, moves between a locking position wherein it cooperates with the lock pair (19), and a free position wherein it does not cooperate, and
an actuating means (8) which rotates the retaining member (7) around its own axis and thus, provides the movement of the retaining member (7) between the locking position and the free position (Figure 4, Figure 5 and Figure 6).

The retaining member (7) prevents the door (5) from opening by cooperating with the lock pair (19) in the locking position, and does not prevent the door (5) from opening by not cooperating with the lock pair (19) in the free position.
The lock (6), furthermore, comprises a casing (10) which has a bearing (12) that bears the retaining member (7) during its rotational movement, and which enables the retaining member (7) and the actuating means (8) to be grouped and held together and to be mounted onto the front wall (3). The retaining member (7) is disposed into the casing (10) such that it will be able to rotate around its own axis inside the bearing (12).
The lock (6) comprises a switch (9) which is activated for the transmission of the data that the retaining member (7) is in the locking position and/or in the free position, and the switch (9) is grouped by being fixed onto the casing (10).
The retaining member (7) comprises a latch (20) which is located at the retaining member (7) end that is near the door (5) and which is preferably formed as an extension that is almost vertical to the rotational axis, and which, in the locking position, cooperates with the lock pair (19) and provides locking, and which, when brought to the free position by being rotated, is released from the lock pair (19) and enables the door (5) to be opened. Thus, the locking process is provided to be performed directly by the rotational movement and the need of movement transmission or conversion of the rotational movement to the linear movement is eliminated.
The retaining member (7) extends preferably almost in the horizontal axis. The casing (10) has an open top structure such that preferably the top portion of the bearing (12) will be open, enabling the retaining member (7) to be disposed therein. Thus, the bearing (12) surrounds the retaining member (7) from below and bears it, and at the same time, the retaining member (7) can also be easily disposed onto the bearing (12).
The casing (10) comprises

a first stopper (13) which is located inside the bearing (12) and against which the retaining member (7) leans when it comes to the free position during the rotational movement, and which stops the rotational movement and
a second stopper (14) which is located inside the bearing (12) and against which the retaining member (7) leans when it comes to the locking position during the rotational movement, and which stops the rotational movement.

Thus, the rotational movement is provided to be limited by the bearing (12) and the need of additional elements for limitation is eliminated.
The retaining member (7) comprises

a first leaning member (15) which leans against the first stopper (13) when the retaining member (7) comes to the free position during the rotational movement and
a second leaning member (16) which leans against the second stopper (14) when the retaining member (7) comes to the locking position during the rotational movement.

When the retaining member (7) is brought to the free position by being rotated to be brought to the free position from the locking position, the first leaning member (15) leans against the first stopper (13). Thus, the retaining member (7) is prevented from rotating more after changing to the free position. When the retaining member (7) is brought to the looking position by being rotated to be brought to the locking position from the free position, the latch (20) settles in the lock pair (19). Meanwhile, the second leaning member (16) leans against the second stopper (14). Thus, the retaining member (7) is prevented from rotating more after passing to the locking position. In other words, by means of the first leaning member (15) - the first stopper (13) and the second leaning member (16) - the second stopper (14) pairs, the rotational movement of the retaining member (7) is limited in both directions.
The casing (10), furthermore, comprises a body (11) whereon the bearing (12) is located, and a head (17)

which is connected to the body (11) and whereon the actuating means (8) is mounted,
which is located after the bearing (12) and which has a shape locking chamber (18) wherein the actuating means (8) and the retaining member (7) are connected shape-lockingly.

The casing (10) comprises at least one fixing means (21) which is located on the body (11) and which enables the casing (10) to be fixed to the front wall (3). In the preferred embodiment of the present invention, the fixing means (21) is formed as an opening which is aligned with the hole located on the front wall (3). In this embodiment, the oven (1), furthermore, comprises a mounting member (22) which is passed through the fixing means (21) and the hole located in alignment with the fixing means (21) and thus, provides the lock (6) to be fixed to the front wall (3).
In different embodiments of the present invention, the fixing means (21) is formed as, for example, detent means and protrusion such that it will provide the casing (10) to be fixed shape-lockingly to the front wall (3).
The oven (2) comprises an outer cabinet wherein the cooking chamber (3) is positioned and which has two side walls (23). In an embodiment of the present invention, the casing (10) comprises at least one leg (24) extending from the body (11) towards the side wall (23) and at least one connection member (25) located at the leg (24) portion which contacts the side wall (23) and enabling the casing (10) to be fixed also onto the side wall (23).
In an embodiment, the connection member (25) is formed as a screw hole. In this embodiment, the oven (1), furthermore, comprises a mounting member (122) which is assembled to the connection member (25) and thus, provides the casing (10) to be fixed to the side wall (23).
In another embodiment, the connection member (25) is a hook-shaped extension such that it will provide the casing (10) to be hung on the side wall (23). In this embodiment, the side wall (23) comprises a housing wherein the connection member (25) is seated.
The lock (6), furthermore, comprises a grasp (26) which grasps the retaining member (7) by partially surrounding it from above. The grasp (26) is shape-locked to the casing (10) from one end and fixed by means of a mounting member (222) such as screw from the other end. Thus, the grasp (26) both assists the bearing of the movement of the retaining member (7) and provides the retaining member (7) to be fixed to the casing (10).
It is to be understood that the present invention is not limited to the embodiments disclosed above and a skilled person in the art can easily introduce different embodiments. These should be considered within the scope of the protection postulated by the claims of the present invention.

Claims

An oven (1) comprising a cooking chamber (2) wherein foods to be cooked are disposed, a front wall (3) which is frame-shaped and has an opening (4) at its center, and which closes the front side of the cooking chamber (2) such that the cooking chamber (2) will be able to be accessed through the opening (4), a door (5) which closes the opening (4) and a lock (6) which provides the door (5) to be locked when required in order to prevent it from opening, wherein the door (5) has a lock pair (19) providing the lock (6) to keep the door (5) in the closed position and wherein the lock (6) has - an at least partially shaft-shaped retaining member (7) which, when the door (5) is in the closed position, moves between a locking position wherein it cooperates with the lock pair (19), and a free position wherein it does not cooperate, - an actuating means (8) which rotates the retaining member (7) around its own axis and thus, provides the movement of the retaining member (7) between the locking position and the free position, - and - a casing (10) which has a bearing (12) that bears the retaining member (7) during its rotational movement, and which enables the retaining member (7) and the actuating means (8) to be held together and to be mounted onto the front wall (3),
characterized by the casing (10) that comprises a first stopper (13) which is located inside the bearing (12) and against which the retaining member (7) leans when it comes to the free position during the rotational movement, and which stops the rotational movement, and that comprises a second stopper (14) which is located inside the bearing (12) and against which the retaining member (7) leans when it comes to the locking position during the rotational movement, and which stops the rotational movement, and
by the retaining member (7) that comprises a first leaning member (15) which leans against the first stopper (13) when the retaining member (7) comes to the free position during the rotational movement and that comprises a second leaning member (16) which leans against the second stopper (14) when the retaining member (7) comes to the locking position during the rotational movement.
An oven (1) as in Claim 1, characterized by the retaining member (7) that comprises at least one latch (20) which is located at the retaining member (7) end near the door (5) and which is preferably formed as an extension that is almost vertical to the rotational axis, and which, in the locking position, cooperates with the lock pair (19) and provides locking, and which, when brought to the free position by being rotated, is released from the lock pair (19) and enables the door (5) to be opened.
An oven (1) as in Claim 1 or 2, characterized by the retaining member (7) which extends almost in the horizontal axis and by the casing (10) which has an open top structure such that the top portion of the bearing (12) will be open, enabling the retaining member (7) to be disposed therein.
An oven (1) as in any one of the above Claims, characterized by the casing (10) that comprises a body (11) whereon the bearing (12) is located and a head (17) - which is connected to the body (11) and whereon the actuating means (8) is mounted, - which is located after the bearing (12) and which has a shape locking chamber (18) wherein the actuating means (8) and the retaining member (7) are connected shape-lockingly.
An oven (1) as in Claim 4, characterized by the casing (10) that comprises at least one fixing means (21) which is located on the body (11) and which enables the casing (10) to be fixed to the front wall (3).
An oven (1) as in Claim 5, characterized by the fixing means (21) that is formed as an opening which is aligned with the hole located on the front wall (3).
An oven (1) as in Claim 5, characterized by the fixing means (21) which is formed as detent means such that it will provide the casing (10) to be fixed shape-lockingly to the front wall (3).
An oven (1) as in any one of the above Claims, characterized by an outer cabinet wherein the cooking chamber (3) is positioned and which has two side walls (23), and by the casing (10) which comprises at least one leg (24) extending from the body (11) towards the side wall (23) and at least one connection member (25) located at the leg (24) portion that contacts the side wall (23) and enabling the casing (10) to be fixed also onto the side wall (23).
An oven (1) as in Claim 8, characterized by the connection member (25) which is a hook-shaped extension such that it will provide the casing (10) to be hung on the side wall (23).
An oven (1) as in any one of the above Claims, characterized by the lock (6) that comprises a grasp (26) which grasps the retaining member (7) by partially surrounding it from above.