KR102481610B1 - Door opening device of door for cooking apparatus and cooking apparatus comprising the same - Google Patents

Abstract

The present invention relates to a door opening device for a cooking appliance and a cooking appliance including the same. A door opening device for an appliance, including a push bar that moves forward and backward from the top of the cooking appliance, a door opening unit that opens the door by a set angle using the push bar, and is provided at the top of the door to move the push bar by magnetic force. It includes an electromagnet unit that maintains contact with the contact member provided at the front end to suppress additional opening of the door, and a switch unit that detects whether or not contact between the contact member and the electromagnet unit is made.

Description

Door opening device for cooking equipment and cooking equipment including the same

The present invention relates to a door opening device for a cooking appliance and a cooking appliance including the same.

A cooking appliance is a home appliance for cooking food, and is mostly installed and used in a kitchen space.

When cooking appliances are classified according to the type of cooking food, they are classified into open type cooking appliances and closed type cooking appliances according to the type of space into which food is input.

For example, representative examples of closed cooking appliances include ovens and microwave ovens, and representative examples of open cooking appliances include cooktops and hobs.

In particular, an airtight type cooking appliance cooks food by sealing a space where food is located and heating the airtight space, and an airtight space in which food is cooked is referred to as a cooking chamber.

The cooking chamber is a space in which food is substantially cooked, and a door capable of being opened and closed is installed in front of the cooking chamber. Further, a heat source such as a gas burner or an electric heater is provided through an inner or outer space of the cooking chamber, and a heating operation is performed through the heat source.

Various methods have been introduced for opening the door for a cooking appliance. Generally, a method in which the door is coupled to a hinge installed at a lower end of the cooking appliance and rotates in a predetermined direction to open the cooking chamber is known.

Among the doors of this type, a manual method in which the door is opened by directly pulling the door handle is divided into an automatic method in which the door is automatically opened by operating a driving unit by recognizing a switch operation or a user's operation. Among them, interest in an automatic method that does not require manipulation of a handle is increasing due to user convenience.

However, in the case of the existing automatic method, the door is fully opened (red or completely opened) at once by the operation of the driving unit, and the front of the cooking appliance is opened.

According to this conventional method, since the door is opened at a rapid speed in conjunction with the operation of the drive unit, there is a problem in that when the door is opened, the user may be surprised or the user may feel danger.

An object of the present invention is to provide a door opening device for a cooking appliance, which can increase a sense of safety in use of the cooking appliance by preventing a user from feeling anxious due to the rapid opening of the door when the door of the cooking appliance is automatically opened.

Another object of the present invention is to provide a cooking appliance including a door opening device capable of relieving a user's anxiety by blocking sudden opening of the door when the door of the cooking appliance is automatically opened.

A door opening device for a cooking appliance according to the present invention is a door opening device for a cooking appliance that is rotatably coupled through a hinge installed at the lower front surface of the cooking appliance and is responsible for opening and closing a cooking chamber. and a door opening portion for opening the door by a set angle using the push bar, provided at an upper end of the door, and maintaining contact with a contact member provided at the front end of the push bar by magnetic force. An electromagnet unit for suppressing additional opening of the door and a switch unit for detecting whether or not contact between the contact member and the electromagnet unit is made.

At this time, when the switch unit detects the release of contact between the contact member and the electromagnet unit, the push bar is driven backward to return to its initial position, and the switch unit maintains contact between the contact member and the electromagnet unit for a predetermined time. If sensed during this time, the push bar is driven backward, but the push bar pulls the door by the magnetic force of the electromagnet unit, so that the door can be closed.

In addition, the door opening unit includes a case accommodating the push bar, a drive motor that operates to drive the push bar forward and backward, and at least two reduction gears to reduce and transmit the driving force provided from the output unit of the drive motor to the push bar. Including a deceleration part that includes.

In addition, the case includes a first case coupled to an upper portion and a second case coupled to a lower portion of the first case, and a protruding hole for advancing and retracting the push bar is provided at the front of the second case. , An insertion hole may be provided at one side of the second case so that the output unit of the driving motor is vertically disposed through.

In addition, the push bar includes a bar-shaped body capable of moving back and forth through the protruding hole, and a rack gear connected to an end of the bar-shaped body and gear-coupled to the reduction part, and the contact member is connected to the front end of the bar-shaped body. It is connected and may be made of a material that adheres to the magnet.

A cooking appliance according to the present invention includes a main body having a cooking chamber therein, a door for opening and closing the cooking chamber, a hinge installed at a lower front surface of the main body to allow the door to rotate, and a door opening device for opening and closing the door. The door opening device includes a push bar that drives forward and backward from the top of the main body, and a door opening unit that opens the door by a set angle using the push bar, provided on the upper end of the door, to resist magnetic force. A door opening device including an electromagnet unit for suppressing further opening of the door by maintaining contact with the contact member provided at the front end of the push bar, and a switch unit for detecting contact between the contact member and the electromagnet unit. include

At this time, when the switch unit detects the release of contact between the contact member and the electromagnet unit, the push bar is driven backward to return to its initial position, and the switch unit maintains contact between the contact member and the electromagnet unit for a predetermined time. If sensed during this time, the push bar is driven backward, but the push bar pulls the door by the magnetic force of the electromagnet unit, so that the door can be closed.

In addition, the door opening unit includes a case accommodating the push bar, a drive motor that operates to drive the push bar forward and backward, and at least two reduction gears to reduce and transmit the driving force provided from the output unit of the drive motor to the push bar. Including a deceleration part that includes.

In addition, the case includes a first case coupled to an upper portion and a second case coupled to a lower portion of the first case, and a protruding hole for advancing and retracting the push bar is provided at the front of the second case. , An insertion hole may be provided at one side of the second case so that the output unit of the driving motor is vertically disposed through.

In addition, the push bar includes a bar-shaped body capable of moving back and forth through the protruding hole, and a rack gear connected to an end of the bar-shaped body and gear-coupled to the reduction part, and the contact member is connected to the front end of the bar-shaped body. It is connected and may be made of a material that adheres to the magnet.

The body may further include an elastic body provided inside the main body to provide an elastic force in a direction of closing the door, and a damper to damp a force to open the door.

Further, the push bar may open the door at least as much as an opening angle at which a force to open the door by the weight of the door is greater than a force to close the door by the elastic body.

According to the present invention, it is possible to reduce the user's anxiety and increase the sense of safety in use of the cooking appliance by preventing the operation of a door that is hinged to the lower front surface of the cooking appliance and automatically opened from being completely opened suddenly.

In addition, according to the present invention, the initial opening section, which requires a relatively large force when opening the door for use of the cooking appliance, is automatically opened by the forward and backward driving of the push bar, and the door can be additionally opened with little force thereafter. there is.

In addition, according to the present invention, if no force is applied to the door for a certain period of time after the door is opened by the push bar, the door automatically returns to the initial position, thereby improving user satisfaction.

1 is a perspective view schematically illustrating a cooking appliance according to an embodiment of the present invention.
2 is a side view briefly showing the internal configuration of a cooking appliance according to an embodiment of the present invention.
3 is an exploded perspective view schematically illustrating a door of a cooking appliance according to an embodiment of the present invention.
4 is a view schematically illustrating a built-in panel embedded in a door of a cooking appliance according to an embodiment of the present invention.
5 is a side view schematically illustrating a door opening device of a cooking appliance according to an embodiment of the present invention.
6 is a perspective view schematically illustrating a door opening according to an embodiment of the present invention.
7 is an exploded perspective view schematically illustrating a door opening according to an embodiment of the present invention.
FIG. 8 is an enlarged view of area VIII of FIG. 5 .
9 is a diagram illustrating contact and release states of a contact member, an electromagnet unit, and a switch unit in a door opening device of a cooking appliance according to an embodiment of the present invention.
10 is a view schematically illustrating how a door is opened by a door opening device of a cooking appliance according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification. In addition, some embodiments of the present invention are described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, order, or number of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element is or may be directly connected to that other element, but intervenes between each element. It will be understood that may be "interposed", or each component may be "connected", "coupled" or "connected" through other components.

In addition, in implementing the present invention, components may be subdivided for convenience of explanation, but these components may be implemented in one device or module, or one component may be implemented in a plurality of devices or modules. It may be divided into and implemented.

In this specification, a cooking appliance is one of home appliances for cooking food, and refers to a device installed in a kitchen space to cook food according to a user's intention. Cooking appliances may be classified in various ways according to the type of heat source or type used, and the type of fuel. When food is classified according to the type of cooking, it can be classified into open type and closed type cooking appliances according to the type of space in which food is placed. Closed cooking appliances include ovens and microwave ovens, and open cooking appliances include cooktops and hobs.

In the following description, the cooking appliance means a closed type cooking appliance, and among them, an oven will be described as an example.

[Overall structure of cooking equipment]

1 is a perspective view schematically illustrating a cooking appliance according to an embodiment of the present invention.

Referring to FIG. 1 , as an embodiment of the present invention, an oven is exemplified as a cooking appliance. The illustrated cooking appliance 1 has a substantially rectangular parallelepiped shape, and includes a main body 10 with an open front and a hollow inside, and a door 50 .

2 is a side view showing an internal configuration of the cooking appliance.

Referring to FIG. 2 , the main body 10 includes an outer housing 11 forming the exterior of the cooking appliance, and an inner housing 12 installed inside the outer housing 11 and having a cavity 12a open to the front. include Here, the cavity 12a constitutes a cooking chamber.

In the main body 10, the upper part of the cavity 12a is provided with an upper room 13, which is a space in which various parts necessary for operating the oven and / or cooking appliances (eg, cooktop, etc.) of a different cooking method from the oven are installed .

A door opening part 100 providing a driving force to forcibly open the door 50 is installed in the upper room 13 . The door opening part 100 includes a push bar 110 (see FIG. 7) that protrudes and protrudes toward the front of the main body 10 to push the door.

The inside of the oven rises to about 450 degrees Celsius, and this temperature may cause the door opening part 100 to malfunction.

In this regard, it is preferable that the door opening 100 is provided in the upper room 13, which is relatively wider than the side or lower part of the cooking chamber, and can easily lower the temperature of the surrounding space.

In addition, the door 50 is biased in the closing direction by the elastic body 70 . Accordingly, in order to easily overcome the elastic force of the elastic body 70, it is preferable to push the door 150 from the upper room 13, which is a position farthest from the hinge 15.

In other words, if the door opening part 100 is disposed in the upper room 13, the door 50 can be opened smoothly even using a drive motor 150 (see FIG. 5) having a relatively small output. .

In addition, the position of the door opening 100 is preferably located on the left or right side of the cooking appliance. After opening the door 50, the user inserts or removes food from the cooking compartment.

If the door opening 100 is located at the center of the upper room 13 of the main body 10 (ie, the center of the left and right sides), the door opening 100 may be noticed by the user.

Therefore, by arranging the door opening 100 on the left or right side of the upper room, there is no visual obstruction, and space utilization of the upper room can be improved.

The door 50 is installed in front of the main body 10 and operates to open or close the cooking chamber.

The door 5 may have a size capable of blocking the front open portion of the cooking chamber. As a specific example, the door 5 may have an area capable of shielding not only the front open portion of the cooking chamber but also the front of the upper room 13 .

The door 50 is rotatably coupled through a hinge 15 provided at a lower front surface of the main body 10 .

The hinge 15 serves as a rotational center for rotating the door 50 in the main body 10 . Accordingly, the door 50 may rotate counterclockwise with respect to the main body 10 to open the cooking chamber, and may rotate clockwise with respect to the main body 10 to close the cooking chamber.

Meanwhile, preferably, an elastic body 70 and a damper 80 may be provided at a lower portion of the main body 10 .

The elastic body 70 provides an elastic force so that the door 50 rotates in a closing direction, that is, in a clockwise direction, and biases the door 50 .

In other words, the soft opening operation of the door 50 is possible by the elastic force provided through the elastic body 70 , and the door 50 during the closing operation can come into close contact with the main body 10 .

The damper 80 serves to dampen the force to open the door 50 when the door 50 is opened.

The damper 80 may provide damping force only when the door 50 is opened or may provide damping force in both directions when the door 50 is opened and closed, if necessary, but is not limited to a specific form.

As another example, the damper 80 may be configured to provide a damping force in all sections in which the door 50 is opened or closed. Alternatively, the damper 80 may be configured to provide a damping force only for a partial angular range among the entire rotation angular range. there is.

3 is an exploded perspective view schematically illustrating a door of a cooking appliance according to an embodiment of the present invention.

Referring to FIG. 3 , the door 50 includes a frame 51 forming an overall frame, which may be formed in a size capable of covering a cooking chamber and/or an upper room.

A hinge bracket 56 is further installed on the frame 51 . The door 50 may be formed by including several sheets of glass, and according to this configuration, the weight of the door 50 may be large.

Therefore, in order to implement a stable opening and closing operation of the door 50, there is a need to reinforce the structural rigidity of the portion coupled to the hinge 15 (see FIG. 2). A hinge bracket 56 may be further provided to reinforce such structural rigidity.

Meanwhile, at least one reflective glass 55 may be installed on the front and rear surfaces of the frame 51 .

The reflective glass 55 may have a size and shape capable of blocking the front open portion of the cooking chamber, but is not necessarily limited to the illustrated shape and may be modified and used in a different shape.

An inner panel 60 is disposed above the position where the reflective glass 55 is installed in the frame 51 .

As a specific example, the inner panel 60 may be formed in a size capable of covering the front of the upper room 13 of the cooking chamber, and is fixed in position through the inner upper space of the frame 51.

An inner glass 53 may be installed on the rear surface of the door 50 .

Specifically, the lower end of the inner glass 53 is fixedly coupled to the frame 51 by the holder 53a, and the upper end of the inner glass 53 may be fixed to the frame 51 by the door cover 57. .

The door cover 57 is coupled to the rear of the inner panel 60 and may be fastened and fixed to the frame 510 .

An outer glass 52 coupled to the front of the frame 51 is disposed on the front of the door 50 . The outer glass 52 may adhere to the front surface of the inner panel 54 .

4 is a view schematically illustrating a built-in panel embedded in a door of a cooking appliance according to an embodiment of the present invention.

Referring to FIG. 4 , an open command input unit 62 in which a light 63 is installed is located on the upper right side of the inner panel 60 .

The lighting 63 may be a white LED, but is not limited thereto. Also, the open command input unit 62 may be a capacitive touch panel through which light is transmitted when the light 63 is turned on, but is not necessarily limited thereto.

For example, a recognition mark indicating that the corresponding area is the opening command input unit 62 may be printed on the upper right side of the outer glass 52 at a location facing the opening command input unit 62 .

At this time, the recognition mark may be formed in the form of a letter such as “Door Open”, or may be a picture icon expressing a shape of a door being opened. Alternatively, it may be formed in the form of a combination of a letter and an icon.

The positions of the open command input unit 62 and its related components (lights, marks, etc.) are not necessarily limited to the form shown in FIG. 4, and may be changed to other positions.

As an example, the open command input unit 62 may generate a door open command through a user's touch manipulation. As another example, the open command may be generated only when the user's touch and drag manipulations are performed simultaneously or sequentially. As another example, the open command input unit 62 may generate a door open command according to an input method other than a manipulation such as a touch, and generate the door open command by detecting a user's designated motion. You can do it.

A display 61 for outputting visual information may be installed at the center of the inner panel 60 .

A proximity sensor 64 may be installed on the inner panel 60 . The proximity sensor 64 recognizes that a user is located in front of the door, and is not limited to a specific type of sensor, and various conventionally known sensors may be used.

On the other hand, the inner panel 60 may be provided with a knock on sensor 65 that detects a user's knock and generates a signal.

The knock on sensor 65 detects a knock and turns on the light inside the cooking compartment, and if a knock is detected again within a certain period of time, the light inside the cooking compartment is turned off. make it possible

Meanwhile, a door LED unit 68 emitting light toward the upper part of the door may be installed on the upper part of the inner panel 60 . By using the door LED unit 68, various colors of light can be emitted before/after use as well as during use of the cooking appliance, thereby improving user satisfaction.

[Door opening device of cooking appliance]

Hereinafter, a detailed configuration of a door opening device of a cooking appliance according to an embodiment of the present invention will be described in detail with reference to FIGS. 5 to 10 .

5 is a side view schematically illustrating a door opening device of a cooking appliance according to an embodiment of the present invention.

As shown, the door opening device of a cooking appliance according to an embodiment of the present invention includes a door opening part 100, an electromagnet part 200, and a switch part 300.

The door opening device of the cooking appliance according to the present invention is rotatably coupled through the hinge 15 installed at the lower front of the cooking appliance (specifically, the main body 10) to open and close the door 50 responsible for opening and closing the cooking chamber. say device

The door opening part 100 includes a push bar 110 that protrudes forward from the upper part of the main body 10 toward the door 50, that is, drives forward and backward. 50) can be opened by physical force as much as the set angle (a).

The electromagnet unit 200 is provided at the upper end of the door 50 and refers to a member that generates and removes magnetic force depending on whether or not power is supplied. The shape and size of the electromagnet unit 200 can be variously changed and is not limited to the illustrated form.

When magnetic force is generated in the electromagnet unit 200, the contact member 115 made of steel provided at the front end of the push bar 110 and the electromagnet unit 200 are maintained in contact with each other by the magnetic force.

In other words, since the attractive force acts between the electromagnet unit 200 and the contact member 115, the door 50 forcibly opened by the set angle a (eg, 10 to 15 degrees, etc.) by the push bar 110 Only maintains a posture connected to the push bar 110, and the opening of the additional door 50 is suppressed.

As a result, when the door is automatically opened, it is possible to prevent the door from being fully opened suddenly due to its own weight, thereby reducing the user's anxiety and increasing the sense of safety in using the cooking appliance.

The switch unit 300 may detect contact between the contact member 115 and the electromagnet unit 200 . To this end, the switch unit 300 may be disposed side by side with the electromagnet unit 200, and may be modularized so that the two components are combined or each may be disposed close to each other.

According to this configuration, when the switch unit 300 detects the release of contact between the contact member 115 of the push bar 110 and the electromagnet unit 200, the door 50 is opened as it is, and the push bar 110 may be driven backward to return to the initial position.

That is, when the user releases the contact between the contact member 115 and the electromagnet unit 200 by further pulling the door 50 forcibly opened by the set angle (a) by the push bar 110, the door ( 50) is separated from the push bar 110 and further opened. At the same time, the push bar 110 separated from the door 50 is driven backward into the main body 10 .

As a different type of operation, when the switch unit 300 maintains contact between the contact member 115 and the electromagnet unit 200 for a predetermined time (eg, 10 seconds, etc.), the push bar 110 moves into the main body. drive back

However, in this case, it is determined that the switch unit 300 does not apply force to open the door from the user, and when the push bar 110 is driven backward, the door 50 contact-fixed by the magnetic force of the electromagnet unit 200 ) to close the door 50.

For example, when a door opening command is given through the opening command input unit 62 (see FIG. 4) to use the cooking appliance, the push bar 110 of the door opening unit 100 is driven forward to move the door 50 at a set angle. Forced open as much as (a). Further, when the user pulls the forcibly opened door 50 forward by the set angle (a), the door 100 is released from contact with the push bar 110 and can be completely opened. If there is no intention to use the cooking appliance in a short time, the user may not apply force to the door that is forcibly opened by the set angle (a). In this case, the push bar 110 has the advantage of being able to close the door 50 by pulling the door 50 using the magnetic force of the electromagnet unit 200 while returning to the inside of the main body 50 .

6 is a perspective view briefly showing the door opening according to the present invention, and FIG. 7 is an exploded perspective view briefly showing the door opening according to the present invention.

Referring to FIGS. 6 and 7 , the door opening part 100 includes a push bar 110 , a case 130 , a driving motor 150 , and a deceleration part 140 .

The push bar 110 is a member that moves forward and backward toward the door 50 (see FIG. 5) from the top of the body 10 (see FIG. 5). When the push bar 110 is moved forward, the door 50 (see FIG. 5) is pushed so that the door 50 (see FIG. 5) is forcibly opened by the set angle (a).

The case 130 is a member in which a predetermined space is secured therein, and accommodates the push bar 110 therein.

The drive motor 150 provides a driving force required to drive the push bar 110 forward and backward. The drive motor 150 is coupled through the lower portion of the case 130, and the output unit 151 (see FIG. 7) is installed to be located inside the case 130.

The reduction unit 140 (see FIG. 7) is composed of a plurality of gears inside the case 130 and reduces the driving force provided from the output unit 151 (see FIG. 7) of the drive motor 150 to push the push bar 110. of the rack gear (113, see Fig. 7).

Specifically, the case 130 includes a first case 131 coupled to an upper portion and a second case 133 coupled to a lower portion of the first case 131 as shown in FIG. 7 .

At this time, a protruding hole 133a for advancing and retreating the push bar 110 may be provided at the front of the second case 133, and an output unit 151 of the driving motor 150 may be provided at one side of the second case 133. ) may be provided with an insertion hole (133b) through which vertically disposed.

Specifically, the push bar 110 includes a bar-type body 111 and a rack gear 113.

The bar-shaped body 111 refers to a rod-shaped member having a square cross-section formed to be movable back and forth through the protruding and retracting holes 133a of the case 130 .

The rack gear 113 is connected to the tail end of the bar-shaped body 111, and is gear-coupled to the reduction unit 140 to linearly move back and forth in conjunction with the rotation of the reduction unit 140.

The contact member 115 is coupled to the front end of the bar-shaped body 111. The contact member 115 is a material attached to magnetic force and may be made of a material such as steel.

Therefore, when magnetic force is generated in the electromagnet unit 200 (see FIG. 5), the contact member 115 is fixed in contact with the electromagnet unit 200, and the push bar 110 and the door 50 may be connected by magnetic force.

FIG. 8 is an enlarged view of area VIII of FIG. 5 .

Referring to FIG. 8 , when a user intends to use the cooking appliance, an open command input unit 62 provided on the inner panel 60 (see FIG. 4 ) of the door 50 may issue a door open command by touch or other methods. can

In response to the door opening command, the push bar 110 of the door opening 100 is driven forward in the set forward and backward direction (W), and the door 50 is moved at a set angle (eg, 10 to 15 degrees) by the push bar 110. ) can be forced open.

At this time, the electromagnet unit 200 and the switch unit 300 are provided on the side of the door 50, and a contact member 115 made of a material such as steel is provided at the front end of the push bar 110. According to this structure, when magnetic force is generated in the electromagnet unit 200, the electromagnet unit 200 attracts the contact member 115, and as a result, the door 50 and the push bar 110 are connected and fixed by the magnetic force. do.

Thereafter, when the user pulls the upper end 50a of the door 50 forward, the contact state between the contact member 115 and the electromagnet unit 200 is released. As a result, the door 50 moves in the opening direction ( That is, it rotates in a counterclockwise direction). At this time, the push bar 110 is driven backward toward the case 130 inside the main body 10 to return to the initial position.

Unlike this, when the user has no intention to use the cooking appliance, he or she may not apply any force to the door forcibly opened by the push bar 110 .

In this case, the push bar 110 is driven backward into the main body 50, and the electromagnet unit 200 and the contact member 115 are fixed in contact with each other by magnetic force, so that when the push bar 110 returns, the door ( 50) can be returned to the closed position.

9 is a diagram illustrating contact and release states of a contact member, an electromagnet unit, and a switch unit in a door opening device of a cooking appliance according to an embodiment of the present invention.

Referring to FIG. 9 , the positional relationship between the contact member 115 of the push bar 110 and the electromagnet unit 200 and the switch unit 300 provided on the door is shown.

Referring to (a) of FIG. 9 , when the push bar 110 advances, the contact member 115 may be fixed in contact with the electromagnet unit 200 where magnetic force is generated.

The switch unit 300 may be disposed together with the electromagnet unit 200 to detect contact between the contact member 115 and the electromagnet unit 200. Specifically, a micro switch or the like may be used.

Referring to (b) of FIG. 9 , when the user applies force to additionally open the door, the contact state between the contact member 115 and the electromagnet unit 200 is released and separated from each other. Further, the switch unit 300 detects the release of contact between the electromagnet unit 200 and the contact member 115, and drives the push bar 110 backward toward the main body to return the push bar 110 to its initial position. .

Hereinafter, an opening structure of a door of a cooking appliance according to an embodiment of the present invention will be described in detail.

10 is a view schematically illustrating how a door is opened by a door opening device of a cooking appliance according to an embodiment of the present invention.

Referring to FIG. 10 , a user may issue a door opening command through a method such as a touch or motion through an open command input unit 62 (see FIG. 4 ) provided in the door 50 of the cooking appliance.

Accordingly, the push bar 110 of the door opening 100 is driven forward, and the door 50 is forcibly opened by a set angle (a) (eg, 10 to 15 degrees) by pressing the push bar 110. do. However, the contact state between the electromagnet unit 200 and the contact member 115 is maintained by the magnetic force of the electromagnet unit 200, and as a result, the connection between the push bar 110 and the door 50 is maintained.

After that, the user can apply force required to open the door 50 by pulling the door 50 forward.

Among the rotation angle ranges of the door 50, section A (eg, 0 to 20 degrees) is a section in which force acts in the closing direction of the door 50 due to the elastic force provided through the elastic body 70, so that a predetermined force is applied. The given door 50 can be opened. Section B (eg, 30 to 60 degrees, etc.) may be a section in which the weight of the door 50 and the elastic force provided from the elastic body 70 are in equilibrium. open operation is possible. Meanwhile, section C (eg, 60 to 90 degrees) may be a section in which the door 50 is fully opened more smoothly than section B due to the weight of the door 50 and the damping action of the damper 80.

However, the range of angles exemplified in these sections may vary depending on the weight of the door and the type and coupling structure of the elastic body and damper, and should not be construed as being limited to the angle described herein.

As described above, according to the configuration and operation of the present invention, the user's anxiety caused by the operation of the door that is instantaneously fully opened to the front of the cooking appliance can be reduced, and the safety of the cooking appliance in use can be increased.

Furthermore, the initial opening section requiring a relatively large force when opening the door for use of the cooking appliance is automatically opened by moving the push bar forward and backward, and then the door can be additionally opened with little force.

Furthermore, if no force is applied to the door for a certain period of time after the door is opened by the push bar, the door automatically returns to its initial position, improving user satisfaction.

The present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and those skilled in the art can make various modifications and equivalent other embodiments. will understand Therefore, the true technical protection scope of the present invention should be determined by the claims below.

1: cooking device 10: main body
11: outer housing 12: inner housing
12a: cavity 13: upper room
15: hinge 50: door
51: frame 52: outer glass
53: inner glass 53a: holder
55: reflective glass 56: hinge bracket
57: door cover 59: hook
60 built-in panel 61 display
62: open command input unit 63: lighting
64: proximity sensor 65: knock on sensor
68: door LED part 70: elastic body
80: damper 100: door opening
110: push bar 111: bar-type body
113: rack gear 115: contact member
130: case 131: first case
133: second case 133a: appearance hole
133b: insertion hole 140: reduction part
150: drive motor 151: output unit
200: electromagnet part 300: switch part

Claims (12)

A door opening device of a cooking appliance that is rotatably coupled through a hinge installed at the lower front of the cooking appliance and is responsible for opening and closing the cooking chamber,
a door opening unit including a push bar driving forward and backward from an upper portion of the cooking appliance, and opening the door by a set angle using the push bar;
an electromagnet unit provided at an upper end of the door and maintaining contact with a contact member provided at a front end of the push bar by a magnetic force to suppress further opening of the door; and
Including; a switch unit for detecting whether or not contact between the contact member and the electromagnet unit is made,
When the switch unit detects a release of contact between the contact member and the electromagnet unit, the push bar is driven to retreat and return to an initial position.
A door opening device for cooking appliances.
According to claim 1,
When the switch unit senses that the contact between the contact member and the electromagnet unit is maintained for a predetermined time, the push bar is driven backward, but the push bar pulls the door by the magnetic force of the electromagnet unit, so that the door is closed. characterized by
A door opening device for cooking appliances.
According to claim 1,
The door opening,
a case accommodating the push bar;
a drive motor that operates to drive the push bar forward and backward; and
a reduction unit including at least two reduction gears to reduce and transmit the driving force provided from the output unit of the driving motor to the push bar;
A door opening device for a cooking appliance comprising a.
According to claim 3,
The case is
A first case coupled to the top; and
A second case coupled to the lower portion of the first case; includes,
A protruding hole for moving the push bar forward is provided at the front of the second case,
One side of the second case is provided with an insertion hole so that the output unit of the driving motor is vertically disposed through.
A door opening device for cooking appliances.
According to claim 4,
The push bar,
a bar-shaped body movable back and forth through the protruding hole; and
A rack gear connected to the tail end of the bar-shaped body and gear-coupled to the reduction unit;
The contact member is connected to the front end of the bar-shaped body and is made of a material attached to a magnet.
A door opening device for cooking appliances.
A main body having a cooking chamber therein;
a door opening and closing the cooking chamber;
a hinge installed at a lower front portion of the main body to enable rotation of the door; and
A door opening device for opening and closing the door; includes,
The door opening device,
a door opening unit including a push bar driving forward and backward from an upper portion of the main body, and opening the door by a set angle using the push bar;
an electromagnet unit provided at an upper end of the door and maintaining contact with a contact member provided at a front end of the push bar by a magnetic force to suppress further opening of the door; and
Including; a switch unit for detecting whether or not contact between the contact member and the electromagnet unit is made,
When the switch unit detects a release of contact between the contact member and the electromagnet unit, the push bar is driven to retreat and return to an initial position.
cooking appliance.
According to claim 6,
When the switch unit senses that the contact between the contact member and the electromagnet unit is maintained for a predetermined time, the push bar is driven backward, but the push bar pulls the door by the magnetic force of the electromagnet unit, so that the door is closed. characterized by
cooking appliance.
According to claim 6,
The door opening,
a case accommodating the push bar;
a drive motor that operates to drive the push bar forward and backward; and
a reduction unit including at least two reduction gears to reduce and transmit the driving force provided from the output unit of the driving motor to the push bar;
A cooking appliance comprising a.
According to claim 8,
The case is
A first case coupled to the top; and
A second case coupled to the lower portion of the first case; includes,
A protruding hole for moving the push bar forward is provided at the front of the second case,
One side of the second case is provided with an insertion hole so that the output unit of the driving motor is vertically disposed through.
cooking appliance.
According to claim 9,
The push bar,
a bar-shaped body movable back and forth through the protruding hole; and
A rack gear connected to the tail end of the bar-shaped body and gear-coupled to the reduction unit;
The contact member is connected to the front end of the bar-shaped body and is made of a material attached to a magnet.
cooking appliance.
According to claim 6,
an elastic body provided inside the main body to provide an elastic force in a direction of closing the door; and
a damper damping a force to open the door;
A cooking appliance further comprising a.
According to claim 11,
The push bar,
At least opening the door by an opening angle at which the force to open the door by the weight of the door is greater than the force to close the door by the elastic body
cooking appliance.

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