KR102106846B1 - A Door Opening Speed Controller for Cooking Device Having an Automatically Opening Door - Google Patents

Abstract

The household electrical appliance includes a body 710 having a cavity therein; A door 720 for opening and closing the open front of the cavity; An opening command input unit 762 that allows a user to command opening of the door; An automatic opening module 10 that maintains the closed state of the door 720 or releases the closed state of the door 720; And a proximity sensor 764 that senses a person's distance in front of the door.
The door opening control method of the home appliance includes: a proximity sensor 764 sensing a distance of a person in front of the door; Determining a distance of a person measured by the proximity sensor 764 when the user inputs a door open command through the open command input unit 762; And when the determined distance of the person is the normal opening distance (c2), causing the automatic opening module 10 to open the door.

Description

A Door Opening Speed Controller for Cooking Device Having an Automatically Opening Door}

The present invention relates to a cooking appliance to which the door is automatically opened by applying an automatic opening structure, a method for controlling operation of the door, and a speed controlling device for opening the door.

Cooking appliances such as ovens and microwave ovens have an overall appearance of a rectangular parallelepiped, the inside of the cooking chamber is open to the front, and a door is provided in front of the cooking chamber.

There are various types of open doors, but a method in which a hinged door is opened and closed by rotating around a rotating shaft is widely used. Most of these types of doors are provided with handles or grooves that the user can grip.

Recently, a function to automatically open and close the door of a cooking appliance has been added. However, the automatic opening method of the door implemented in the conventional cooking appliances has a problem in that a driving unit having a high output should be used because the door needs to be opened while overcoming the elastic force added to the door in order to add the closing force of the door.

In addition, in the related art, the driving unit that provides the opening force for opening the door is installed near the rotating shaft of the door with limited space, and thus the structure design and manufacturing are complicated, and frequently exposed to the hot environment of the cooking chamber, resulting in malfunction.

Patent Document 1 discloses an automatic door opening structure for releasing the opening by lifting the latch of the swing door with a cam. Two latches of the swing door are provided on one side of the door, and these latches interlock with each other. That is, the operation of one latch and the operation of the other latch are connected to each other. In addition, the cam opening the door lifts one of the two latches upwards, and the latch lifted upwards is pushed forward by an inclined surface provided at the upper portion of the latch holder to open the door.

However, the door opening method of Patent Document 1 is based on the premise that the latch has a structure interlocked with each other. That is, since the invention disclosed in Patent Document 1 is a method in which one latch is lifted in conjunction with the other when the latch is lifted, the latch simply exceeds the locking jaw of the main body in a state in which one latch is lifted. Just open the door.

In general, the latch provided on one side of the swing door is not too difficult to configure to interlock with each other. However, in a cooker to which a pull-down type door structure is applied, the latches provided on the upper left and upper right sides of the door, respectively, have a very long installation distance between the two latches as compared to the swing door, so that a structure that links them is applied. There is an unreasonable effect, and when two latches are interlocked, there is a hassle, such as redesigning both the electromagnetic leakage structure of the door and the electromagnetic leakage structure of the main body. Therefore, the automatic door opening structure of Patent Document 1 is difficult to apply to a pull-down type door.

For this reason, in the conventional automatic opening structure of the pull-down door, the structures for lifting the latches on the left and the latches on the right, respectively, had to be installed on both sides of the main body. However, a cooking appliance having a pull-down door has insufficient space on both sides of the main body, compared to a cooking appliance to which a swing-type door is applied. In addition, if the latches on both sides are lifted at the same time and are not released, the automatic opening operation of the door is not smooth.

On the other hand, the door opening method of Patent Document 1 implements the force of lifting the latch by the operation of the cam. The cam is directly connected to a driving means such as a motor, and five curved profiles are provided radially along the circumferential direction of the cam. Therefore, in order to secure the driving force of the cam, a motor that generates as much power is required, or installation of a reduction gear is essential. And these drivetrains are bound to be very heavy. Since a heavy drive system has a large inertia force, the cam profile does not stop immediately at that position even if the cam profile is depressed.

If the cam does not stop in place, a problem occurs when the door is closed. That is, even if the latch is brought into the latch holder by closing the door, the force that presses the cam at the lower end of the latch does not rotate the heavy driving system. Therefore, the latch is not completely seated in the latch holder, and remains in an incompletely overhanging state. This causes false detection of the sensor that detects the door closing, and the cooking appliance does not operate because it recognizes that the door is not closed properly.

On the other hand, most of the automatic opening functions of the above door include a motor and a cam that rotates thereby, and a micro switch that is pressed by the cam to control the rotational displacement of the motor.

Patent Document 2 discloses a method of monitoring a door automatic opening mechanism having a latch (locking member) driven by a motor. The monitoring device verifies that the oven door locking member is in an appropriate locked or unlocked position. When it is detected that the oven door locking member is not in the proper position, the monitoring device repeatedly applies a pulse signal to the motor so that the locking member comes into position.

However, since the variation of the voltage applied to the motor cannot be taken into account, the control mechanism of the above method may not have the position of the locking member after one pulse signal.

In addition, the above method does not control the positioning of the locking member at once by continuously sending a signal, but is a method in which a pulse signal must be applied several times. It is bound to take more.

In addition, the above-described failure detection method is performed as a separate procedure from the operation of the locking member. Therefore, the input power for the operation of the locking member and the pulse power required to detect the failure of the locking member must be operated separately. This method complicates product power control.

On the other hand, if the door is automatically opened by its own weight after the door of the pull-down type is unlocked, the opening force of the door gradually increases as the opening angle of the door increases. However, the conventional hinge module for adjusting the opening speed of the door is composed of a combination of a structure for applying an elastic force in the opposite direction of the opening direction of the door and a structure for applying a damping force in the opposite direction of the opening direction of the door.

In this conventional hinge module structure, most of the elastic force and damping force are designed in such a way that a person does not feel the weight of the door severely when a person opens the door while the person holds the door. However, according to the structure in which the door is automatically opened from the closing angle to the full opening angle, it is difficult to control the opening speed of the door with the conventional design method.

 For example, if the damping force of the door is increased to prevent the door from increasing in opening speed, the initial opening speed is too slow. On the other hand, if the damping force is lowered to increase the initial opening speed, as the opening angle of the door increases, the increased opening force overwhelms the damping force, causing the door to open too hard.

Preferably, the automatic opening of the door is controlled so that the user does not hit the door. For example, if the door is opened when the user is in front of the door, there is a fear that the user may hit the door. In addition, when the door is opened during cooking, there is a possibility that the user may be burned while the heated air inside the cavity suddenly comes out through the gap in which the door is opened.

On the other hand, if the user does not open the door unconditionally because the user is in the opening trajectory of the door, there is a possibility that the door does not open even if the user presses the door open button or the like and automatically inputs a command to open the door. That is, when a user normally inputs a door opening command at a position where a button of the cooking appliance is pressed, the door needs to be controlled to be opened.

Accordingly, there is a need for a door opening control capable of preventing the user from being injured or surprised in the process of opening the door, while the user automatically enters the door opening command to automatically open the door.

United States Patent Publication No. US2011-0095019A1 United States Registered Patent Publication US 7,225,804 B1

The present invention has been devised to solve the above-mentioned problems, and a cooking device capable of automatically opening a door even if a structure for automatically opening a door having a structure in which two latches behave independently is applied to either latch. It aims to provide.

In addition, an object of the present invention is to provide a cooking appliance capable of automatically opening a door even with a low-power driving unit.

In addition, an object of the present invention is to provide a cooking appliance in which the reliability of the automatic opening operation is ensured without being affected by the hot environment of the cooking compartment.

In addition, an object of the present invention is to provide a cooking appliance that provides a neat aesthetic because the structure for automatically opening the door is not visible from the outside.

In addition, an object of the present invention is to provide a door opening speed regulating device capable of sufficiently controlling the opening speed of a door in an automatic opening structure of a door in which the opening force of the door becomes greater as the door is opened.

In addition, according to the present invention, in the automatic opening structure of a door in which the opening force of the door becomes larger as the door is opened, the opening is smoothly performed even at the initial opening of the door, and the door is slowly controlled at a controlled speed even when the door is completely opened. An object of the present invention is to provide a door opening speed control device that can be opened.

In addition, in order to solve the above-described problem, the present invention uses a power (a continuous square wave AC power) that is normally input to a cooking appliance instead of a repetitive pulse signal to continuously apply a signal to drive the motor, while driving the motor and the same. It is an object of the present invention to provide a method for controlling the operation of an automatic opening door of a cooking appliance that is guaranteed to be in a fixed position.

In addition, the present invention, by using a normal input signal without driving the motor to generate a separate fault detection signal, a method of checking the detection signal of the monitoring device such as a switch for a predetermined time, the operation of the automatic door opening device It is an object of the present invention to provide an automatic opening door operation control method for a cooking appliance.

In addition, an object of the present invention is to provide an automatic opening door operation control method capable of promptly checking whether an error has occurred in an automatic opening mechanism of a door while simultaneously performing an automatic opening operation of the door.

In addition, the object of the present invention is to provide a door opening speed adjusting device capable of sufficiently suppressing an increase in a terminal opening speed while sufficiently securing an initial opening speed of a door in a pull-down door automatic opening operation. do.

In addition, an object of the present invention is to provide a door opening control method capable of preventing a user from being injured or surprised in the process of opening a door while smoothly performing an operation in which the door is automatically opened by inputting a door opening command. do.

The present invention includes a main body 710 having a cooking chamber (cavity) therein, a door 720 for opening and closing the open front of the cooking chamber (cavity), and an opening / closing rotation shaft 814 serving as a rotation center of the opening and closing movement of the door. ), And the opening / closing rotation shaft 814 is located at the front lower portion of the main body 710 and is centered around a horizontal rotation shaft extending in a horizontal direction, and the door 720 is rotatably connected to the main body, Accordingly, the door has a structure in which the door is opened downwardly about the rotation axis, and the door can be applied to a pull-down type cooking appliance (electric appliance) elastically biased by a spring 823 in a direction in which the door is closed. have.

In the automatic door opening structure of the present invention, on the surface where the door 720 faces the main body 710, a horizontal pivot shaft 210 extending toward the main body 710 and provided in the door 720 is provided. A latch 200 that rotates to the center is provided, and in the portion of the body 710 corresponding to the position where the latch 200 is provided in the closed state of the door 720, the latch 200 and the door 720 are hung. ) May be applied to a structure in which a latch holder 10 is provided to keep the closed state or to be unlocked with the latch 200 to open the door 720.

In order to solve the above-described problem, the present invention, the inside of the latch holder 10, the latch 200 introduced into the hook receiving space 180 inside the latch holder 10, the opening direction of the door 720 The lever 300 to be pushed out is installed, and the latch 200 is released from the latch holder 10 using the lever 300.

To this end, the lever 300 lifts the latch 200 and pushes it in the opening direction of the door. In the door 720, at an angle a1 slightly opened by the lever 300, the force at which the door 720 is to be opened by its own weight is greater than the force applied to the spring 823, and the door 720 is opened by its own weight.

According to this structure, since the lever 300 is not exposed to the outside, even if an automatic opening structure of the door is applied, such a structure is not visible to the outside, thereby providing a clean appearance and improving quality sensitivity.

Also, in order to automatically open the door 720, the door 720 can be opened by its own weight without driving the door 720 to a fully opened position. Simple to implement.

Here, the latch 200 is provided on both sides of the door 720, the two latches 200 rotate independently, and the lever 300 is one of the latch holders 10 of the two latches 200 It may be provided only in the holder 10. That is, according to the present invention, both latches can be released by simply pushing one of the two latches operating independently of each other.

If the door is opened downward without any damping by its own weight, the door may be impacted or an impact may be applied to the connection portion between the door and the body.

Thus, in the door opening speed adjusting device of the present invention, the door is opened with respect to the direction in which the door 720 is opened, from an opening angle a2 larger than the opening angle a1 to a full opening angle a3. It is possible to make the damping force act in the opposite direction.

The opening angle (a2) at which the damping force starts to act may be 30 ° or more and 40 ° or less, so that the door is opened slowly by receiving sufficient damping force, but the door is not opened too slowly.

A hinge module 800 may be installed at one lower end portion of the door and the lower lower portion of the other side, respectively. One of these hinge modules may have a damping intrusion angle (a2) of 30 ° or more and 40 ° or less, and the other hinge module may have a damping intrusion angle (a2 ') of 60 ° or more and 80 ° or less.

That is, the damper 850 installed in the hinge module 800 installed at one lower end of the door 720 enters the damping when the opening angle of the door reaches the damping intrusion angle (a2), and the The damper 850 installed in the hinge module 800 installed at the lower side of the other side may rush into damping when the opening angle of the door reaches an additional damping rush angle (a2 ') greater than the damping rush angle (a2). .

The hinge module includes: a housing 810 extending in the longitudinal direction and fixed to the main body 710; A door bar 840 rotatably connected to the housing 810 around an opening / closing rotation shaft 814, and fixed to the door 720; An inner link housing 830 which is rotatably connected to the door bar 840 through a door bar connection hinge 831 and guided by the housing 810 to move in the front-rear direction; And a damper 850 including a piston 851 and a cylinder 852, and providing damping force as the piston and the cylinder move relatively.

In addition, the door bar connection hinge 831 may be spaced apart from the opening / closing rotation shaft 814 by a predetermined distance (r, r ').

And one of the piston and the cylinder of the damper 850 is advanced together as the inner link housing 830 is advanced, and the other of the piston and the cylinder of the damper 850 is the inner link housing 830. After advancing together as the advancing forward and advancing by a predetermined distance d2 and d2 ', the housing 810 may interfere with it and no longer advancing.

According to the present invention, the predetermined distance (d2) of the hinge module installed on one side of the door is shorter than the predetermined distance (d2 ') of the hinge module installed on the other side of the door, and the attenuation incidence angle of the two hinge modules (a2, a2 ') can be different from each other.

Specifically, the damper 850 is provided on the other of the piston and the cylinder of the damper 850, the slot 853 extending in the front-rear direction, and a damper installed in the housing 810 and fitted into the slot A support pin 813 may be further provided, and the predetermined distances d2 and d2 'may be determined by the length of the slot 853.

Next, the distance (r) between the door bar connection hinge 831 and the opening / closing rotation shaft 814 of the hinge module installed on one side of the door is connected to the door bar connection hinge 831 of the hinge module installed on the other side of the door. It can be set to be greater than the distance (r ') between the opening and closing rotation shaft 814.

If the distance between the opening / closing rotating shaft 814 and the door bar connecting hinge 831 is different, the moving distance of the inner link housing 830 corresponding to the opening angle of the same door is changed. It is possible to vary the damping intrusion angles a2 and a2 'of the two hinge modules.

Of course, it is also possible to mix a method of different lengths of the slots 853 of the two hinge modules, and a method of different distances between the opening / closing axis 814 of the two hinge modules and the door bar connecting hinge 831. Do.

On the other hand, for the opening angle of the same door, it is also possible to make the stroke of the damper 850 of the hinge module installed on one side of the door and the stroke of the damper 850 of the hinge module installed on the other side of the door to be different from each other. As an example of implementing this, a method for adjusting the distance between the opening / closing rotating shaft 814 and the door bar connecting hinge 831 of the hinge module described above may be exemplified.

If the strokes of the dampers are different for the opening angle of the same door, even if the same damper is used for the two hinge modules, the damping force applied to the doors by each hinge module can be different. That is, although the damping coefficients of the damper 850 of the hinge module installed on one side of the door and the damper 850 of the hinge module installed on the other side of the door are substantially the same, the damping stroke differs for the opening angle of the same door. The damping forces Fd1 and Fd2 applied at different times can be adjusted differently. Meanwhile, the damping force is released 0 ° to 5 ° before the maximum opening angle a3 of the door, so that the door is incomplete. It can be induced to open completely, not open.

The latch 200 includes a latch bar 220 extending from the door toward the main body, and a hook portion 230 provided in a form protruding downward from an end of the latch bar 220.

The latch 200 is biased in a direction in which the hook portion 230 is downward. In addition, the rear surface facing the door close to the hook portion 230 is provided with a rear sloped surface 231 extending toward the latch bar 220 from the lower end of the hook portion 230, and the door 720 closed , The rear inclined surface 231 maintains an interference state with the inner inclined surface 112 of the latch holder 10.

The inner inclined surface 112, so as to correspond to the rear inclined surface 231, has a shape inclined upward toward the door from the main body, it is also possible for the user to manually open the latch holder to which the automatic opening structure is applied. .

The operation of the lever 300 simply lifting the latch 200 may not allow the latch 200 to be released from the latch holder. While the latch 200 is lifted by the lever 300, it must be able to be pushed out in the opening direction of the door. Accordingly, the lever 300 pushes the latch 200 in a diagonal direction between the front side and the top side. Then, the latch 200 can be moved out of the latch holder beyond the structure in which the latch was hung.

The lever 300 is provided with a push portion 330 in contact with the latch 200, the push portion 330 is disposed below the center of rotation of the lever 300, the push portion 330 At the front end of the front, a push-up slope 333 having a normal toward the front top is provided, and the push-up slope 333 may include a curved surface.

Correspondingly, a lower end inclined surface 232 having a normal toward the rear lower part and contacting the pushing inclined surface 333 may be provided at a lower end of the front end of the latch 200. In addition, an upper inclined surface 221 having a downward inclined shape may be provided at an upper end of the latch 200 as it moves away from the door.

A latch entry / exit hole 110 is provided in the front of the latch holder 10 to be a passage through which the latch 200 enters or exits the hook accommodation space 180.

If the latch 200 is lifted upward by the lever and is pushed out of the latch holder, interference occurs in the opening direction of the door, and the upper surface of the latch 200 is latched in and out due to some degree of blocking of the door opening. Even if a situation occurs in which the ball 110 touches the ceiling surface and can no longer move upward, when the lever 300 continues to push the latch 200 forward and lift, the latch 200 The latch 200 slides in the direction in which the door is opened while the upper surface of the door is in contact with the ceiling, so that the door can be pushed out.

That is, the upper inclined surface 221 provided on the upper end of the latch 200 is opened after contacting the upper wall surface 113 which is the ceiling surface of the latch entry / exit hole 110 while the latch 200 is lifted by the lever. By sliding in the direction, the force of the lever 300 pushing the latch 200 is smoothly transmitted to the door.

After the latch 200 is disengaged by the lever 300 and pushed in the open direction, the latch 200 is, by elasticity, a latch entry / exit hole 110 provided in front of the latch holder 10. It is seated on the outer slope 111 provided on the bottom of the. Since the outer inclined surface 111 has a downwardly inclined shape from the main body toward the door, the latch 200 does not interfere with the opening of the door in the process of opening the door, but rather the force at which the latch 200 descends is the outer diameter It interacts with the slope 111 to push the door further outward.

The latch holder for implementing the above-described door opening mechanism includes: a holder body 100 constituting the entire frame of the latch holder; A latch entry / exit hole 110 provided in front of the holder body 100 and serving as a passage through which the latch 200 moves in and out; An outer inclined surface 111 provided at a lower portion of the latch entry / exit hole 110 and inclined downward toward the front; And an upper wall surface 113 provided on the latch entry / exit hole 110. A lever support portion 120 spaced apart from the rear of the latch entry / exit hole 110; A hook receiving space 180 provided between the latch entry / exit hole 110 and the lever support 120; A lever 300 rotatably supported by the lever support portion 120 and a push portion 330 provided at its front end is accommodated in a lower portion of the hook receiving space 180; A pusher 500 that rotates the lever support 120 to lift the lever 300; And a pusher driver 600 that drives the pusher 500.

The push part 330 includes an interpolation member 331 provided at a front end of the lever 300 and an extrapolation member 332 that is extrapolated to the interpolation member 331, and the extrapolation member 332 is the It is in contact with the latch 200 and pushes the latch 200 in the opening direction of the door 720. Thus, the extrapolation member 332 and the other lever 300 can be configured with different materials, so that it is possible to selectively configure a material suitable for performance that each configuration should exhibit.

The extrapolation member 332 preferably includes a resin-based material having a lubricating surface having a higher wear resistance and a lower friction coefficient than the interpolation member 331.

The front surface of the lever support part 120 is provided with a shielding surface part 123 that shields the inside of the latch holder from being visible through the latch entry / exit hole 110 from the outside, so that the inside of the latch holder is not visible from the outside, and a clean appearance Gives

The lever 300 is supported by the second lever support shaft portion 122 provided on the second side of the lever support 120, and is rotatably installed adjacent to the second side of the lever support 120. . The lever 300 includes a shaft portion 310 hinged to the lever support portion 120 and a working portion 320 extending forward from the shaft portion 310.

The lever 300 may be disposed by bypassing the shielding surface portion 123, and accordingly, the push portion 330 extends from the distal end portion of the acting portion 320 to the first side and the hook receiving space 180 It can be accommodated in the lower portion.

The shielding surface portion 123 is arranged to be offset laterally with respect to the lever entry / exit hole 110, so that even if the push portion 330 is installed in violation of the shielding surface portion 123, the push portion 330 of the lever 300 The degree of eccentricity from the acting portion 320 to the side can be minimized.

The push portion 330 includes: a top surface 334, a bottom surface 335 disposed below the top surface 334 and extending further forward than the top surface 334, and a front end and bottom surface of the top surface 334 ( 335) is provided at the lower end of the pushing inclined surface 333 and the pushing inclined surface 333 connected so that the front end is inclined, and further includes a pushing part 336 protruding most forward from the push part 330 .

As the lever 300 rotates and the push part 330 is lifted, the latch 200 accommodated in the hook accommodating space 180 has the upper surface 334 and the pushing inclined surface 333. Starting from the vicinity of the boundary, it slides to the lower end of the pushing inclined surface 333 and receives the force from the lever 300 to lift it.

The push part 330 is disposed below the rotation center of the lever 300, and as the lever 300 rotates, the pushing part 336 is higher than a height corresponding to the rotation center of the lever 300. It is raised to the height. Accordingly, the push unit 330 pushes the lever 300 outward.

The lever 300 further includes a force point portion 340 extending from a rotation center of the lever 300 and receiving a force to rotate the lever 300 at a position spaced apart from the rotation center, and the force The point portion 340 and the holder body 100 are connected by a return spring 630 that applies the force point portion 340 in a direction in which the push portion 330 descends.

An opening detection switch 400 for detecting a closed state of the door is installed at a lower portion of the hook receiving space 180, and a trigger 420 of the opening detection switch 400 is disposed under the push portion 330. However, in a state in which a latch is not drawn into the hook receiving space 180, the push unit 330 descending by the return spring 630 does not press the trigger 420, so that the push unit 330 is alone. Press the open detection switch 400 to prevent the cooking appliance from malfunctioning.

The force point portion 340 is pressed by the pusher 500 in a direction opposite to the return direction of the return spring. Therefore, when the pusher 500 presses the force point portion 340, the force moves the force point portion 340 while overcoming the restoring force of the return spring, and accordingly the lever 300 rotates so that the push portion 330 latches. (200) will be lifted. And when the pusher 500 returns, the lever 300 returns to the original position by the return spring.

The pusher 500 includes: a rotating plate 520 rotated by a motor 610; And a pusher cam 540 which is provided at an eccentric position in the rotation center of the rotating plate 520 and rotates as the rotating plate 520 rotates, thereby pressing or releasing the force point portion 340. Accordingly, according to the displacement of the rotating plate 520, the pusher cam 540 presses or releases the lever.

The rotating plate is provided in an eccentric position from the rotation center of the rotating plate 520, the pressing projection 530 is provided at a position not meeting the lever 300 even if the rotating plate 520 rotates as it rotates It is provided, in the vicinity of the pusher 500, the rotating plate 520 is rotated and pressed when the pressing protrusion 530 is located at a predetermined position, and trigger 622 that is not pressed at a position outside the predetermined position A return stop switch 620 is provided to control rotation and stop points of the rotating plate 520.

For example, when the trigger 622 of the return stop switch 620 is pressed, the pusher driving unit 600 driving the pusher 500 is stopped, so that the operation of the pusher can be accurately controlled.

On the other hand, the automatic opening door operation control method of the present invention for solving the above-described problems can be applied to the main body 710 having a cooking chamber therein and the automatic opening structure of the above-described cooking appliance.

In the automatic opening door operation control method of the present invention, when the power is supplied to the cooking appliance or when the user turns on the cooking appliance, the lever 300, the pusher 500, and the pusher driving unit 600 are aligned in the right position. Control.

For example, the pusher 500 connected to the motor 610 allows the pusher to be aligned with the position in which the return stop switch 620 is pressed, that is, the return stop switch is turned on. Then, when the door opening operation is made, the motor 610 moves the pusher 500, and then the pusher 500 moves to the position where the return stop switch is pressed again.

At the initial start-up of the cooking appliance (starting power supply, pressing a power button, etc.), the pusher 500 may not be positioned at the correct position. The present invention, even in such a case, in order to align the pusher 500 so that it is in the correct position, when the pusher 500 is located in a position not to turn on the return stop switch when the cooking appliance is started, the motor 610 Power is supplied to the motor 610 until the pusher 500 presses the return stop switch. When the motor 610 rotates and the pusher 500 presses the return stop switch, the power supplied to the motor is cut off.

The power supplied to the motor may use power supplied to the cooking appliance, that is, AC power. In addition, the power is supplied in a continuous form, not in a pulsed or intermittent form.

In applying the motor driving method for supplying power to the motor of the latch holder in a continuous form, the above initial alignment is a very meaningful driving control.

According to the latch holder driving principle of the present invention, accurate positioning and alignment of the pusher 500 is required for automatic opening control of the door. To this end, in the control method of the present invention, by continuously monitoring the period during which power is supplied to the motor, the on-off state of the return stop switch, and the on-off state of the open detection switch, it is possible to accurately control the automatic opening operation of the door. have. In addition, according to the present invention, even if there is no separate sensor for confirming whether the motor is actually rotating, it is possible to control the pusher in position and automatically open the door.

In the above-described latch holder, when the latch 200 is accommodated in the latch holder 10 and is in a locked state, the pusher 500 is returned by the pusher 500 by the force that the hook portion 230 of the latch presses the lever 300. The switch 620 is moved in linkage to a position where it is pressed.

Therefore, if the door is closed correctly, the pusher 500 in the latch holder 10 maintains the initial fixed position.

At the initial start-up time of the cooking appliance, the door may be closed or open, even if the door is open, the pusher 500 may not be in a fixed position for reasons such as a power failure and may be out of a position where the return stop switch is pressed. have.

Accordingly, the present invention controls the alignment of the pusher 500 at the initial start-up of the cooking appliance. To this end, the automatic door opening control method of the present invention includes: a first step of checking whether the return stop switch 620 is in an on state when the cooking appliance is turned on; A second step of supplying power to the motor when the return stop switch 620 is turned off in the first step; A third step of supplying power to the motor in the second step and checking whether the return stop switch 620 is in an on state after a predetermined time (t ₀ ) has elapsed; And a 4-1 step returning to the first step when it is confirmed in step 3 that the return stop switch 620 is switched to the on state.

When the above control algorithm is applied, it is possible to align the pusher 500 in place at the initial starting point of the cooking appliance.

On the other hand, in the third step, it may be determined that the return stop switch 620 is not switched to the on state and remains off, and in this case, it may be determined that the return stop switch or the motor is abnormal, Accordingly, a fourth error step for generating a fourth error signal for notifying the failure of the return stop switch or the motor and stopping the cooking apparatus may be further included.

Of course, when it is confirmed in the first step that the return stop switch 620 is in the on state, since the pusher 500 is already in the right position, there is no need to control the alignment of the pusher 500 in the right position. Rather, even if the pusher 500 is in a fixed position, if the alignment is performed as above, a closed door may be opened.

According to the latch holder of the present invention, when the door is closed, the pusher is expected to be in the fixed position by the interlocking structure of the lever and the pusher. There is no need to sort.

When the initial alignment of the pusher 500 as described above is performed, the control unit maintains a standby state until a user inputs a door opening command. Of course, as described above, after the cooking appliance is started, the control unit continuously monitors the on-off state of the return stop switch and the open detection switch, and whether the motor is supplied with power.

In the first step, the pusher 500 is in the correct position regardless of whether the pusher 500 is in the correct position since the procedure for controlling the correct position of the pusher 500 has been performed. After it is confirmed that the user has entered the fifth step of waiting for the user to input the door open command, and if the user's door open command is input, the control for automatic door opening operation is entered.

To this end, the present invention goes through a sixth step of supplying power to the motor and confirming that the return stop switch is switched to the off state when the user's door open command is input in the fifth step.

When it is confirmed in step 6 that the return stop switch is switched to the off state, it can be confirmed that the motor is operating normally. In this case, after a predetermined time has elapsed, a seventh step is performed to check whether the open detection switch is turned off.

If it is confirmed in step 7 that the open detection switch has been turned off, it can be confirmed that the latch pushes the latch normally and the latch is released from the latch holder. In this case, the eighth step of checking whether the return stop switch is turned on is performed.

If it is confirmed in step 8 that the return stop switch has been turned on, it can be confirmed that the return stop switch is also operating normally. In this case, step 9-1 is returned to step 1.

As described above, the 6th, 7th, 8th, and 9-1st steps above, through the monitoring signal (return stop switch signal, open detection switch signal, motor power supply period), the normal operation of the motor and the door It is a step that can be performed when both the normal open operation (unlocking the latch) and the normal operation of the return stop switch are confirmed.

In the sixth step, when the return stop switch is switched to the off state, it can be understood that the motor has moved when power is supplied to the motor, so the motor can be determined to be normal, but the return stop switch is not switched to the off state. In the case of maintaining the ON state, it can be determined that the motor is abnormal by determining that the motor has not moved even though power is supplied to the motor.

In addition, although the return stop switch is switched to the off state in the sixth step, the return stop switch is turned on even after a predetermined period of time (the time at which the pusher is operated by the motor and the pusher can return to the original position) has passed. In the case of maintaining the off state without being switched, since the motor is moving normally and the return stop switch senses it, it can be confirmed that the motor and the return stop switch are operating normally, and the door opening operation such as the latch does not deviate from the latch holder to It can be determined that the latch operation is abnormal.

Next, in step 6, even after the return stop switch is switched to the off state, even if the open detection switch is switched to the off position, a predetermined time (a time sufficient for the pusher to be operated by the motor and the pusher to return to the original position) If the return stop switch remains off even after), the motor is operating smoothly and the latch is normally released from the latch holder, but it is determined that the return stop switch did not detect the pusher in its original position. It can be determined that the return stop switch is abnormal.

In addition, although the return stop switch is maintained in the on state without switching to the off state in step 6, when the open detection switch is switched off after a predetermined period of time, the motor moves normally and the latch is also released accordingly. Although the motor and the pusher move normally, it can be determined that the return stop switch did not detect it even though the pusher is in a position where the push stop switch is not pressed, and accordingly, it may be determined that the return stop switch is abnormal.

The algorithm and sequence will be described in more detail as follows.

After the power is supplied to the motor according to the user's open command input, and it is confirmed that the return stop switch is switched to the off state, after confirming that the open detection switch has been turned off after a predetermined time, the return stop in the eighth step When the switch is not switched to the on state and is maintained in the off state, the operation of the cooking appliance may be terminated after generating a second error signal informing that the return stop switch is abnormal and notifying it.

And, after the power is supplied to the motor according to the user's open command input, and it is confirmed that the return stop switch is switched to the off state, the open detection switch is not switched to the off state and remains on even after a predetermined time has elapsed. In this case, after determining that there is an abnormality in the latch operation and generating a first error signal informing it, the operation of the cooking appliance may be terminated.

In addition, when it is confirmed that power is supplied to the motor according to the user's open command input, and it is confirmed that the return stop switch is not turned off and remains on, the motor or the return stop switch may be abnormal. And, accordingly, an error signal can be generated.

It is judged in the following order whether there is an abnormality in the motor or return stop switch. The judgment is that the door is closed after a certain period of time (if the motor is operating normally, the motor rotates to operate the pusher and the lever can push the latch out of the latch holder accordingly). You can proceed by checking whether the open detection switch was turned off.

To this end, according to the present invention, when the door is closed when the motor starts to supply power to the sixth step, and the open detection switch is in the on state, after a predetermined time has elapsed, the open detection switch is switched to the off state. Prepare a twelfth step to confirm.

When it is confirmed in step 12 that the open detection switch has been switched to the off state, the motor can be confirmed to be normal and there is an error in the return detection switch, thereby generating a second error signal informing the abnormality of the return detection switch. Letting it go through step 13-1.

On the other hand, if it is confirmed in step 12 that the open detection switch does not switch to the off state and remains on, it can be determined that the motor is abnormal, and accordingly generates a third error signal informing the abnormality of the motor. It may be subjected to steps 13-2.

Of course, when determining whether there is something wrong with the motor or return stop switch as above, it is referred to whether the door is closed and then opened normally, so when the power is supplied to the motor, the open monitoring switch is already off (when the door is open) ), It is difficult to check where there is an abnormality between the motor and the return stop switch. In this case, a fourth error signal indicating that there is an abnormality in any one of the motor and the return stop switch may be generated.

On the other hand, the present invention, the body 710 having a cavity therein; A door 720 for opening and closing the open front of the cavity; An opening command input unit 762 that allows a user to command opening of the door; An automatic opening module 10 that maintains the closed state of the door 720 or releases the closed state of the door 720; And a proximity sensor 764 for sensing the distance of a person in front of the door.

The door opening control method includes: a proximity sensor 764 sensing a distance of a person in front of the door; Determining a distance of a person measured by the proximity sensor 764 when the user inputs a door open command through the open command input unit 762; And when the determined distance of the person is the normal opening distance (c2), causing the automatic opening module 10 to open the door. That is, when the user inputs the door opening command, the user's location is determined, and when the user's location is determined to be a suitable location for opening the door, the door can be opened.

The normal opening distance c2 may include a close distance c21 closer to the main body and a basic distance c22 farther from the main body than the close distance c21.

The normal opening distance c2 may be equal to or greater than a distance b2 at which the door is opened from the main body at the time of entering the damping intrusion angle a2 at which the opening speed of the door is damped. That is, the normal opening distance c2 may include a section in which the opening speed of the door is maintained at a slow speed due to attenuation.

The distance b3 of the position where the door is opened farther forward from the main body 710 may be within the normal opening distance c2. That is, the normal opening distance c2 includes the distance b3, and may include a farther position. The farther location may include a distance at which the user is expected to be able to enter a door opening command.

The normal opening distance (c2) is closer than the distance (c21) and the distance (c21), which is a distance section from the distance (b2) of the door where the attenuation is projected to the distance (b3) at which the door is opened the farthest. It may include a far basic distance (c22).

When the user inputs the door opening command, the door starts to open when the determined person's distance is the basic distance (c22), and the waiting time or delay time of several seconds when the determined person's distance is the proximity distance (c21). After this, the door opening may begin. Accordingly, the user can secure a time to step back from the door during the delay time.

When the user inputs the door opening command, the door is opened at the first speed when the determined person's distance is the basic distance (c22), and the first speed when the determined person's distance is the proximity distance (c21). The door can be opened at a slower second speed. Thereby, it is possible for a user to secure time to step back from the door after seeing the door open.

The door opening start after the waiting time or the delay time and the door opening operation of the second speed may be selectively or applied together.

If the determined distance of the person is the ultra-close distance (c1) closer to the main body than the normal opening distance (c2), by delaying the opening of the door until the distance of the person to the normal opening distance (c2), the user It can prevent a phenomenon such as hitting the door to be opened.

When the determined distance of the person is an ultra-close distance (c1) closer to the main body than the normal opening distance (c2), a warning may be alerted to the user to retreat back through a display or sound.

The door opening delay and warning can be applied selectively or together.

At the time when the user inputs the door opening command, if the determined distance of the person is farther than the normal opening distance c2 (c3), the door opening command may be ignored or the door may not be opened. When the door opening command is input even when the user is at a distance where the door opening command cannot be input, it may be determined as an error in the proximity sensor or the door opening command input unit.

The present invention further provides a household appliance including a control unit 77 to which the door opening control method is applied.

According to the cooking appliance of the present invention, a structure for automatically opening a door in which a pair of latches that operate independently of each other is installed can be simply implemented by installing and driving a lever applied to one side of the latch holder. Accordingly, the door can be automatically opened without the interlocking structure of the pair of latches and without the opening structure of the two latches, so that the design of the door is simple and the cavity space of the cooking appliance can be further secured.

In addition, the present invention uses a lever to amplify the opening force of the door, and it is sufficient to initially open the door only up to a position to open the door by its own weight, so that a structure of automatically opening the door even with a low-power driving unit can be implemented. .

In addition, since the drive system itself is light, when the latch is accommodated in the latch holder by closing the door, even if the lever and the pusher are slightly shifted from the correct position, the lever and the pusher are rearranged to the correct position by the force pressing the lever. It is possible, and accordingly, the door closing operation may be smoothly performed.

In addition, the automatic opening structure of the present invention is installed in a position not affected by the hot environment of the cooking room, and since its components are not exposed to the outside, there is no risk of malfunction and a clean appearance can be provided.

On the other hand, the door opening speed control device of the present invention, in the automatic opening structure of the door in which the opening force of the door becomes greater as the door is opened, even when the door is opened, it is smoothly opened, even when the door is completely opened. As the door can be opened slowly at a controlled speed, it can be implemented smoothly by sufficiently controlling the automatic opening operation of the door as a whole.

Next, according to the door automatic opening control method of the cooking appliance of the present invention, while generating a different type of power in addition to the conventional continuous AC power supplied to the cooking appliance and supplying it to the motor, while supplying the conventional power to the motor, It is possible to monitor errors or abnormalities of each configuration of the automatic door opening device only with the signals of the return stop switch, which is a configuration for determining the stop position of the motor, and the opening detection switch, which is a configuration for checking whether the door is open. That is, the automatic opening operation can be accurately controlled without a separate sensor for confirming whether the motor is operating or a separate sensor for confirming whether the latch is properly maintained in the latch holder.

In addition, according to the present invention, without the operation of separately checking the error of the automatic opening operation of the door, the power supplied to the motor and the signals of the return stop switch and the opening detection switch are continuously monitored during the automatic opening operation of the door. , In real time, it is possible to check whether the automatic door opening structure is malfunctioning.

In addition, according to the automatic door opening control method of the present invention, in addition to a conventional latch holder, by simply adding a motor and a pusher (cam), a lever and a return stop switch, without a separate sensor or separate control means, The automatic opening operation of the door can be accurately controlled.

In addition, according to the automatic door opening control method of the present invention, an operation in which the door is automatically opened by inputting a door opening command is smoothly performed, so that a user is not surprised or injured in the door opening process.

1 is a side view of a cooking appliance showing a process in which the door is opened by its own weight.
2 is an exploded perspective view showing an embodiment of a door installed in front of the main body of the cooking appliance of FIG. 1.
3 is an enlarged perspective view of the inner supporter of the door of FIG. 2.
4 is a perspective view of a latch holder to which an automatic opening structure of a cooking appliance according to the present invention is applied.
5 is an exploded perspective view of the latch holder of FIG. 4.
6 is a perspective view of a holder body of the latch holder of FIG. 5.
FIG. 7 is an enlarged view showing an axis portion, an action portion, and a push portion of the lever of the latch holder of FIG. 5.
FIG. 8 is a side view of FIG. 4, showing a latch holder in a state where a latch (not shown) is inserted and fixed.
FIG. 9 is a view showing a state in which the pusher of FIG. 8 pushes the lever, and the bushing portion of the lever is lifted.
10 is a view showing a state in which the pusher and the lever are returned to the initial position while the latch is removed.
11 is a side view showing a state in which the latch is inserted and fixed in the latch holder by closing the front of the cavity of the cooking appliance with the door in the cooking appliance in which the latch holder is installed.
FIG. 12 is a view showing a process in which the pusher pushes the lever in FIG. 11 and the push-up inclined surface of the lever lifts the latch.
13 is a view showing a process in which the process of lifting the latch in FIG. 12 is further progressed, and the pushing part of the lever pushes the latch.
FIG. 14 is a view showing a state in which the latch descends and then rests on the outer slope.
15 is a perspective view showing a door hinge structure that can be used to automatically open and lower the door by the weight of the door as shown in FIG. 1.
16 is a side view showing the door hinge structure of FIG. 15.
FIG. 17 is a view showing a structure in which the length of the slot of the cylinder is extended in the door hinge structure of FIG. 16 to delay the damper's intervention time for opening the door.
18 is a view showing a structure in which the damper intervening time with respect to the opening of the door is delayed by reducing the distance of the door bar connecting hinge to the opening / closing rotating shaft in the door hinge structure of FIG. 16.
19 is a view showing the opening force of the door, the opening blocking force of the spring, and the damping force of the damper according to the opening angle of the door.
20 is a view showing the geometric shape of the lever of the present invention.
21 is a flowchart showing the overall control method of the automatic opening structure of the cooking appliance according to the present invention.
22 is a flowchart showing only the error signal generation step in FIG. 21 separately.
23 is a flowchart showing a control process of initializing the motor and the pusher to the initial position when the cooking device is initially started in FIG. 21.
24 is a flowchart showing a method for automatically controlling a door according to the present invention.
25 is a view showing the input steps of the display in each order.
26 is a view showing a configuration for controlling the opening of the door according to the present invention.
27 is a flowchart showing a method for controlling the opening of a door.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and the scope of the invention to those skilled in the art is completely It is provided to inform.

[Overall structure of cooking equipment]

Hereinafter, the overall structure of the cooking appliance to which the door automatic opening control method according to the present invention is applied will be described.

Referring to FIG. 1, as an embodiment of the present invention, a microwave oven is illustrated as a cooking appliance. However, it will be apparent that the cooking appliance of the present invention is not limited to a microwave oven and can be applied to other cooking appliances such as an oven.

The cooking appliance has a substantially rectangular parallelepiped shape, and includes a main body 710 with an open front and an empty interior, and a door 720 installed in front of the main body 710.

The main body 710 includes an outer housing that forms the overall appearance of the cooking appliance, and an inner housing that is installed inside the outer housing and is provided with an open cavity. The cavity constitutes a cooking chamber. Various parts necessary for the operation of the cooking appliance are provided on the upper, rear, and side of the main body 710.

The door 720 has a pull-down opening and closing structure having a horizontal hinge axis 814 (see FIGS. 15 and 16) at the lower end of the door. That is, the door 720 is opened by pivoting forward and downward relative to the main body, and is closed by pivoting toward the rear top.

The area of the door 720 may be an area that merely opens or closes the front of the cooking chamber, but may be an area that covers both the front of the cooking chamber as well as the upper space of the cooking chamber as shown. At this time, a control unit such as a display 761 and a touch panel may be installed on the front surface of the door 720 corresponding to the upper space of the cooking compartment.

The door 720 is coupled to the main body 710 through a hinge module 800 provided at a front lower portion of the main body 710. The hinge module 800 is a center for rotating the door 720 relative to the main body 710 based on the opening / closing rotation shaft 814 extending from side to side. Accordingly, the door 720 is rotated to the front lower portion with respect to the main body, and is opened and closed to the rear upper portion.

2 and 3, the door 720 includes a frame 721 that serves as an overall frame and frame. The frame 721 is in the form of a rectangular border. The frame 721 has a border sized to cover not only the cooking room but also the upper room of the cooking room.

Hinge brackets 726 are further installed on the lower left and right sides of the frame. A plurality of glasses may be used as the door 720 of the cooking appliance, and accordingly, the weight may also be considerable. Therefore, in the rotation process of the door 720, it is necessary to reinforce the rigidity of the portion that is combined with the door bar 840 of the hinge module 800. The hinge bracket 726 further reinforces the rigidity of the door 720.

The frame 721 has a predetermined thickness in the front-rear direction, and a reflective glass 725 is installed on the front and rear portions of the frame 721, respectively. The reflective glass has a size sufficient to cover the front of the cooking chamber and is fixed to each other on the inner edge of the frame 721.

In addition, an internal supporter 724 is fixed to an upper portion of the frame 721 where the reflective glass is installed. The inner supporter 724 is sized to cover the front of the upper room of the cooking chamber and is fixed to the inner upper edge of the frame 721. When the area of the inner supporter 724 is combined with the area of the reflective glass, it is approximately the inner area of the frame 721.

On the rear side of the door, an inner glass 723 is installed in which the lower end is fixed to the frame by the inner glass holder 7231 and the upper end is fixed to the frame by the door cover 727. The door cover 727 covers the rear of the inner supporter 724 and is fixed to the frame.

The outer glass 722 is fixed to the front of the frame in a form that covers the entire front surface of the frame. That is, the outer glass 722 is fixed to the frame 721 in a form that covers both the frame 721, the reflective glass 725, and the inner supporter 724.

The rear surface of the outer glass 722 is in close contact with the front surface of the inner supporter 724. In the upper right portion of the internal supporter 724, an open command input unit 762 with a light 763 is provided. The lighting 763 may be a white LED, and the open command input unit may be a capacitive touch panel through which light is transmitted when the lighting 763 is turned on. As a position corresponding to the open command input unit 762, a mark indicating that the corresponding area is an open command input unit may be printed on the upper right of the outer glass 52. The mark may be, for example, a character form such as "door open", or an icon in which a shape in which the door is opened is expressed.

The position of the open command input unit 762 and its related configuration (lighting, mark, etc.) is not necessarily limited thereto, and may be any position on the front surface of the internal supporter 724. However, as described above, since the position where the user manipulates the cooking appliance is in front of the cooking appliance, and the user's gaze is expected to be at the center of the front of the cooking appliance, the proportion of the right-handed person among the users is more than that of the left-hander. In view of the above, it is preferable that the open command input unit 762 is generally located at the upper right.

The open command input unit 762 may generate an open command only by a touch operation, or may generate an open command only when a touch and a drag operation are performed together. In addition, the open command input unit 762 may be applied to various other types of input methods as well as a touch panel. For example, the open command input unit may be a motion sensor that detects motion.

A display 761 is installed at the front center of the inner supporter 724. The installation position of the display also takes into account the posture or position of the user. That is, since the position where the user operates the cooking appliance is in front of the cooking appliance, and the user's gaze is expected to be in the upper center of the front of the cooking appliance, the display corresponds to the front of the user's gaze rather than being positioned to the left or right. It is preferable that it is the central portion of the inner supporter 724 which is the position. However, it is a matter of course that the position of the cooking appliance may be changed when the structure of the door of the cooking appliance is changed, and thus the position where the user is expected to stand in front of the cooking appliance is changed. Various commands may be input through the touch panel.

A proximity sensor 764 (proximity sensor) is installed at the lower left of the internal supporter 724. The proximity sensor may be a sensor capable of detecting a movement within a predetermined distance, a sensor capable of measuring a distance to an object in front, or a combination thereof. That is, if the proximity sensor is a method capable of recognizing that there is a person in front of the cooking appliance, various types of sensors may be applied.

The installation position of the proximity sensor is not limited to the position shown in the drawing, and if the sensing area of the sensor is an area representative of the front of the cooking appliance, the position change is also possible. However, according to the cooking appliance of the embodiment, in consideration of the fact that the display 761 is installed at the front center of the inner supporter 724 and the open command input unit 762 is installed on the right side, the proximity sensor is disposed on the left side. It is preferred.

The cooking chamber of the cooking appliance can be quite hot, and the possibility that heat of the cooking chamber affects various sensors or displays built into the internal supporter 724 cannot be excluded. In this regard, there is a room to apply a structure for forcibly flowing air for cooling the door and the inside of the inner supporter. If various sensors and the like are concentrated in the inner supporter, there is a room for the cooling effect to be halved.

In addition, when a user who is expected to be mainly right-handed lifts the right arm and manipulates the open command input unit 762 and the display 761 by hand, if the proximity sensor is on the right, all of these user's operation actions are captured by the distance signal There is room for some sort of disturbance in. On the other hand, if the proximity sensor is located on the left side, the user's hand motion may not be detected by the proximity sensor, so it will be advantageous in many ways that the position of the proximity sensor is on the left side.

In addition, a knock-on sensor 765 that recognizes the sound generated by knocking and generates a signal when knocking a portion of the outer glass 722 in a region corresponding to the reflective glass 725 is further provided on the inner supporter 724. Can be installed. The knock-on sensor 765 may control the lighting of the cooking compartment by turning on the lighting inside the cooking compartment when knocking is detected, and turning off the lighting inside the cooking compartment when knocking is detected again.

The position of the knock-on sensor is also a position that does not overlap with the position of the display 761, the open command input unit 762, and the proximity sensor 764 where the position is designated, between the proximity sensor 764 and the display 761, Alternatively, it may be disposed between the display 761 and the open command input unit 762.

In the present invention, a structure in which a knock-on sensor is disposed between the proximity sensor 764 and the display 761 in order to minimize detection of a sound generated when the user presses the open command input unit 762 to the knock-on sensor Is illustrated.

A door LED unit 768 for irradiating light upward may be installed on the upper surface of the inner supporter 724. The door LED unit may be installed in an array form, or LEDs may be provided only on both sides of the left and right sides, or may be installed in a form in which a diffusion plate is provided between them.

Since the latch holder 10, which will be described later, automatically opens the door, the door does not need to have a separate handle. This can omit the handle that was previously installed on the front of the oven door, further improving the design of the oven.

A latch holder 10 is provided at a side upper portion of the main body 710 to maintain the closed state of the door 720 and to automatically open the door. The latch holder 10 may be an automatic opening module that controls automatic opening of the door. In addition, the door 720 is provided with a latch 200 that is caught by the latch holder 10 to maintain a closed state or is released from the latch holder 10 to open the door.

The latch is installed so as to protrude rearward from the top of both ends of the door. The latch holder 10 of the main body 710 is disposed at the front upper ends of both ends of the main body corresponding to the position where the latch is installed. The latch holder 10 is opened forward and has a latch entry / exit hole 110 through which the latch can enter and exit.

The latch holder 10 for automatically releasing the latch may be provided in correspondence with one of the two latches, and the other side may be provided with a conventional conventional latch holder without an automatic release function. have. And the two latches are installed on the door to behave independently of each other. The two latches may be elastically supported in the door so that the hook portion of the tip portion is downward, and the elastic force acting on the two latches may be the same.

The hinge module 800 in which the spring 823 and the damper 850 are installed is connected to the lower portion of the main body and the lower portion of the door, as shown in FIGS. 15 and 16. The spring 823 biases the door in the direction in which the door 720 rotates upwards, that is, in the direction of closing the door. Accordingly, the spring 823 prevents the door from being opened strongly when the door is opened and lowered.

In addition, the damper 850 damps the rotational force of the door when the door is opened to allow the door to open slowly. If necessary, the damper 850 may provide the damping force only when the door is opened, or may provide the damping force in both the opening and closing directions of the door. In addition, the damping force may be provided in all the rotation angle sections in which the door is opened and closed, or the damping force may be provided in some of the ranges of the rotation angle.

The damper 850 may damp the opening force of the door in a predetermined opening angle section of the door, and may not provide a damping force in a section outside the opening angle. In the present invention, a structure in which the damper 850 operates in a section corresponding to a2 and a3 of FIG. 1 is illustrated. The damping incidence angle a2 at which damping starts when the door is opened may be 35 ± 5 ° (see FIG. 1).

[Latch holder]

Hereinafter, a latch holder that is an automatic door opening device for a cooking appliance to which the door automatic opening control method of the present invention is applied will be described with reference to FIGS. 4 to 10.

The latch holder of the present invention includes a holder body 100 that supports the overall structure, a latch entry / exit hole 110 provided in front of the holder body 100, a lever 300 installed in the holder body 100, and an open detection switch 400, a pusher 500, a pusher driving unit 600.

From the front of the latch holder, the latch 200 of the door 720 is drawn in and out through the latch entry / exit hole 110. A hook accommodating space 180 in which a hook of the latch is accommodated is provided inside the latch in / out hole 110. Under the hook receiving space, an open detection switch 400 is installed to detect whether the hook is accommodated in the constant hook receiving space 180 to maintain a locked state.

At the rear of the hook accommodation space 180, a lever support 120 in which the lever 300 is rotatably installed is provided. The lever 300 includes an acting part 320 extending forward from the lever support 120 and a push part 330 extending from the distal end of the acting part 320 to the hook receiving space 180, the lever It is provided with a force point portion 340 extending rearward from the support portion 120 and extending upward.

An open detection switch 400 is installed under the hook accommodation space 180. The open detection switch 400 includes a trigger 420 disposed under the push unit 330. The trigger 420 is pressed in contact with the push unit 330, but the force pressing the trigger 420 is provided by the latch 200 accommodated in the hook receiving space 180.

A pusher 500 that pushes the force point portion 340 of the lever 300 backward and a pusher drive portion 600 that provides a driving force of the pusher 500 are installed above the lever support portion 120. The motor 610 of the pusher driving unit 600 is fixed to the second side of the holder body 100, and the pusher 500 is disposed on the first side of the holder body 100 and rotated by the motor 610 do. The rotational displacement of the motor 610 is controlled by a return stop switch 620. This control is performed by an operation in which the pressing protrusion 530 installed on the pusher presses the trigger 622 of the return stop switch 620 according to the rotation angle displacement of the pusher 500.

The force point portion 340 of the lever 300 is connected to the holder body 100 through the return spring 630 and receives a force applied forward by the return spring 630. Hereinafter, each configuration of the latch holder according to the present invention will be described in more detail.

[Holder body]

The holder body 100 supporting the overall structure of the latch holder according to the present invention includes a base surface 101 including a plane extending in the vertical direction and the front-rear direction, that is, a plane having a normal in the first side and the second side. It includes.

In the lower front portion of the holder body 100, a latch entry / exit hole 110 that is opened forward is provided. The latch entry / exit hole 110 is a path through which the latch 200 enters into the holder body 100 from the front, or the latch exits from the holder body 100 forward.

In the latch entry / exit hole 110, an outer inclined surface 111 defines a boundary as a lower portion, an upper wall surface 113 defines a boundary as an upper portion, and a side wall surface 114 as a side in both sides thereof. Define boundaries.

At the lower portion of the latch entry / exit hole 110, an outer inclined surface 111 in an upwardly inclined form is provided from front to rear. When the latch 200 enters into the holder body 100, the lower inclined surface 232 of the hook portion 230 of the latch 200 rides on the outer inclined surface 111.

An inner inclined surface 112 is provided at a rear end of the outer inclined surface 111. The inner inclined surface 112 is in the form of an inclined hieroglyph from the rear to the front. A substantial portion of the inner sloped surface 112 and the upper end of the outer sloped surface 111 are interconnected by a smooth curved surface.

The inner inclined surface 112 is in contact with the back inclined surface 231 of the hook portion 230 of the latch 200 entering the holder body 100 and prevents the latch 200 from being detached from the front and falling out. On the other hand, the inner inclined surface 112, when the user pulls the door forward to open the door, provides a slanted surface that allows the rear inclined surface 231 of the latch 200 to slide naturally. . The back sloped surface 231 may be a flat surface or a curved surface that is slightly convex. That is, according to the present invention, the user can also manually open the door.

The upper wall surface 113 includes a horizontal ceiling surface provided on the top of the latch entry / exit hole 110. When the lever 300 pushes the latch 200 to automatically open the door, the upper wall surface 113 is the upper surface of the latch 200, more specifically, the upper slope of the latch 200 221 ) And guides the upper inclined surface 221 to slide forward.

The upper wall surface 113 and the outer inclined surface 111 are mutually connected to the first side and the second side vertically by the side wall surface 114. Since the gap between the two side wall surfaces 114 is wider than the width of the latch 200, it does not interfere with the latch 200.

A shield surface portion 123 is provided at a rear side of the latch entry / exit hole 110 to shield the inside from being seen through the latch entry / exit hole 110 when viewed from the front. The shielding surface portion 123 includes a flat plate shape having a normal in the front-rear direction. The hook portion 230 of the latch 200 is accommodated in the hook accommodation space 180 provided by the shielding surface portion 123 being spaced backward from the latch entry / exit hole 110.

The shielding surface portion is perpendicular to the base surface 101 and is connected to the base surface 101 to reinforce the overall rigidity of the holder body 100. A lever support portion 120 for rotatably supporting the lever 300 is provided at the rear side of the shield surface portion. The lever 300 is a component that operates to cancel the latching state of the latch 200 fixed to the holder body 100.

The lever support portion 120 needs some rigidity to support the lever, and this rigidity is satisfied to some extent by the shielding surface portion 123.

Since the shield surface portion 123 blocks the latch entry / exit hole 110, the lever 300 installed on the lever support portion 120 is disposed at a position to avoid the shield surface portion 123 and the lever support portion 120. . The lever support 120 extends from the base surface 101 and is provided on the extension member 121 connected to the shield surface 123 and the extension member 121 to rotate the lever 300 It is provided with a lever support shaft portion 122 to support. The lever 300 is axially coupled to the lever support shaft portion 122 to rotate, and is guided to rotate on the second side of the extension member 121.

A front end portion of the lever 300 includes a push portion 300 extending from the front end portion of the lever 300 to the first side. The push portion 300 includes the shield surface portion 123 and the latch entry / exit hole 110. It is located in the hook receiving space 180 provided between.

The shield surface portion 123 may be disposed in a form slightly offset toward the first side with respect to the lever in / out hole 110. This is to minimize eccentricity to the side between the push portion 330 and the force point portion 340 of the lever 300 to which the force acts.

In the lower portion of the latch entry / exit hole 110 and the lever support portion 120, an open detection switch fixing portion 150 is provided in which an open detection switch 400 for detecting a closed state of a door is fixed. The open detection switch fixing part 150 includes a flat part having a normal to the side, and interconnects a lower part of the latch in / out hole 110 and a lower part of the lever support part 120.

 The opening detecting switch fixing part 150 includes a fixing wall 151 for supporting the switch body 410 of the opening detecting switch 400, and at least a part of the fixing wall 151 includes the lever supporting part ( 120).

In the state where the switch body 410 is installed in the opening detection switch fixing part 150, the trigger 420 of the opening detection switch 400 protrudes upward toward the hook receiving space 180. In addition, the lever 300 has a trajectory capable of pressing the trigger 420.

The holder body 100 further includes a structure for supporting the pusher 500 and the pusher driving unit 600 for driving the lever 300.

In the holder body 100, a pusher 500 for pushing the lever 300 is installed to rotate the lever 300 in a direction in which the latch 200 is opened. To this end, a pusher support unit 130 is provided on the base surface 101 to support the pusher 500. The pusher support 130 includes a hole 131 into which the rotation shaft 510 of the pusher 500 is inserted, and a first side supporting the rotating plate 520 of the pusher 500 around the hole 131. Includes. The first side is in contact with the pressing projection 530 provided on the second side of the rotating plate 520 to support the rotating plate 520.

On the opposite surface (second side) of the base (101) where the pusher 500 is installed (first side), a pusher driving unit fixing the pusher driving unit 600 driving the pusher 500 Government 170. The pusher driving part 600 may be a rotating motor 610, and a housing of the motor 610 may be fixed to a second side surface of the base surface 101.

On the base surface 101 of the holder body 100. A return stop switch fixing part 160 for fixing the return stop switch 620 is provided. The return stop switch 620 includes a trigger 622 that is pressed by the push protrusion 530 of the pusher 500. The trigger 622 is stopped by the pusher 530 at a position where the pusher 500 pushes the lever 300 and then returns to return, thereby stopping rotational driving of the motor 610. Therefore, the return stop switch 620 is installed at a position where the trigger 622 is pressed by the pressing protrusion 530 at the return position of the pusher 500. The return stop switch fixing part 160 may be provided on an upper portion of the pusher support part 130.

In addition, in order to provide a force to return to the original position after the lever 300 pushes the latch 200, a return spring support 140 is provided on the holder body 100. The return spring support 140 is disposed closer to the lever support 120 than the pusher support 130. The return spring support 140 may include a hook hanger 141 for hanging a ring provided at one end of the return spring 630.

[lever]

The lever 300 is fixed to the lever support 120 so that the shaft 310 is rotatably fastened to the lever support shaft portion 122 of the holder body 100. The lever support shaft portion 122 includes an axial shape extending in the second side, and the shaft portion 310 may be a hole shape accommodating the axial shape. Conversely, the lever support shaft portion 122 may have a hole shape, and the shaft portion 310 may have an axial shape.

The lever 300 includes an acting portion 320 extending forward from the shaft portion 310. A push portion 330 extending in the first side is provided at the distal end of the acting portion 320. With the lever 300 installed in the holder body 100, the push part 330 is disposed in the hook accommodation space 180 of the holder body 100.

Since the lever 300 transmits the force pushing the latch 200, it is made of a material having a relatively stiffness, and since the push part 330 is a portion in sliding contact with the latch 200, the wear resistance is high and the friction coefficient is high. It is desirable to be made of low materials. The lever 300 may be a metal material such as aluminum alloy.

The push part 330 is made of the same material as the overall material of the lever 300, or an interpolation member 331 made integrally with the lever 300 and an extrapolation member extrapolated to the interpolation member 331 ( 332). The interpolation member 331 secures the rigidity of the push portion 330, and the extrapolation member 332 is made of a material having a low friction coefficient and high abrasion resistance, so that it can slide into contact with the latch 200. Particularly, the push part 330 rises in sliding contact with the latch 200, and the pushing part 336 operates to reliably push the front end faces 232 and 233 of the latch 200. The extrapolating member 332 is made of a material having a high hardness and wear resistance of the surface, a low friction coefficient, and a lubricity to further increase the reliability of operation.

The interpolation member 331 may be integrally formed of a metal material such as aluminum alloy together with the lever 300. On the other hand, the extrapolation member 332 may be made of a resin-based material. The resin-based material has a large surface hardness and is excellent in elastic deformation and restoration when compared to a metallic material, and thus does not break or break, so it is elastically deformed and restored by the force applied to the extrapolating member 332 by a latch. Even if this is repeated, there is much less risk of breaking the surface. Therefore, the extrapolation member is not damaged while sliding with the latch, and can further exert the effect of pushing the latch through elastic deformation and restoration.

On the other hand, if the interpolation member 331 is in direct contact with the latch, there is a fear that permanent damage may occur on either surface by contact between metal materials, which may result in a large frictional force and enlarge the damaged area. In addition, since the elastic restoring force of the resin-based material cannot be expected, there is a fear that the opening operation of the latch may not be smooth.

The push part 330 may have a substantially trapezoidal cross section when viewed from the side. The bottom surface 335 of the push part 330 becomes a pressing surface for pressing the trigger 420 of the open detection switch 400 provided under the push part 330. The upper surface 334 of the push portion 330 becomes a surface on which the hook portion 230 of the latch 200 accommodated in the hook accommodation space 180 is placed. That is, the latch 200 presses the push portion 330 downward from the upper surface of the push portion 330, and the push portion 330 presses the trigger 420 by the force of the latch pressing.

Since the upward force applied to the switch body 410 by the trigger 420 is greater than the load of the push unit 330, only the push unit 330 without the latch 200 is placed on the trigger 420. , The push unit 330 does not push down the trigger 420 and is slightly raised on the trigger 420.

The push part 330 is provided with a pushing inclined surface 333 on the front surface. The pushing inclined surface 333 is a shape in which the lower end protrudes more forward than the upper end, and is inclined backward toward the upper end from the lower end. The pushing inclined surface 333 has a slightly convex curved profile, and is in sliding contact with the lower inclined surface 232 of the latch 200 and transmits the force of the lever 300 to the latch 200. The lower end of the pushing inclined surface 333 constitutes a pushing part 336 that pushes the front end of the latch 200 to the last.

The lever 300 further includes a force point portion 340 extending rearward based on the shaft portion 310. In order to amplify the force that the push portion 330 lifts and pushes the latch, the distance between the force point of the shaft portion 310 and the force point portion 340 is greater than the distance between the shaft portion 310 and the push portion 330. Is set further. According to such a structure, the pusher driving unit 600 may be configured to be lighter and lighter.

In order to make the latch holder more compact, the force point portion 340 may be manufactured in a substantially “L” shape, and the force point may be provided near the upper end portion of the force point portion 340. The force point portion 340 is subjected to a force by the pusher 500, and the force is transmitted to the push portion 330.

When the pusher 500 applies force to the force point portion 340 and then returns to the force point portion 340, the lever 300 is a spring spring to which one end of the return spring 630 returns to its original position. Government 342. The spring fixing portion 342 is disposed closer to the shaft portion 310 than the force point of the force point portion 340. Unlike when the lever 300 pushes the latch 200, a strong return force is not required when the lever 300 returns to the initial position after pushing the latch. Therefore, the spring fixing portion 342 may be disposed closer to the shaft portion 310 than the force point of the pusher 500. The spring fixing part 342 may include a hook hook shape for hanging a ring provided at the other end of the return spring 630.

The return spring 630 is preferably to provide only the force of the lever 300 to the original position. That is, since the return spring 630 does not continuously apply the lever 300 that has returned to its original position, the push part 330 of the lever 300 is the trigger 420 of the open detection switch 400 alone. ).

The lever 300 includes a first side facing the first side and a second side facing the second side, and the first side is a second side of the lever supporting portion 120 facing the second side. It is supported against the surface.

[Pusher]

The pusher 500 is a component that pushes the force point of the lever 300 and is installed on the holder body 100. The pusher 500 is disposed adjacent to the force point portion 340 of the lever 300. The pusher 500 includes a rotating plate 520 having a normal shape in a first side and a rotating shaft 510 provided at the center of the rotating plate 520 on a second side (a side facing the second side) of the rotating plate. And, from the center of the rotating plate 520 on the first side (face facing the first side) of the pressing projection 530 provided in an eccentric position from the center of the rotating plate on the second side, It includes a pusher cam 540 provided in an eccentric position.

The rotating plate 520 has a generally flat disk shape, and the force point portion 340 of the lever 300 is disposed facing the first side of the rotating plate 520.

The rotating shaft 510 extends toward the second side. That is, the rotation shaft 510 becomes a rotation center of the rotation plate 520 arranged to extend laterally. The leading end portion of the rotating shaft 510 (an end portion far from the rotating plate) is inserted into the hole 131 of the holder body and is rotationally supported. In addition, the rotating shaft 510 is fixed to the rotating drive shaft 611 of the motor 610 provided on the opposite side of the rotating plate 520 with the holder body 100 interposed therebetween.

The pressing protrusion 530 is connected to the proximal end (the end closest to the rotating plate) of the rotating shaft 510 and is provided on the second side of the rotating plate 520. The pressing projection 530 is provided at any part in the circumferential direction of the rotating plate 520, and the radially outer end of the pressing projection 530 is provided at a position where the trigger 622 of the return stop switch 620 can be pressed. do. Since the pressing protrusion 530 rotates around the rotation shaft 510 and depresses the trigger 622, a convex curved portion 531 is provided at the tip. The curved portion 531 of the pressing protrusion 530 has a convex shape when viewed at least from the side, so that the trigger 622 is pressed against the convex shape of the curved portion 531.

The curved portion 531 includes a curved profile 5311 provided on both sides, and a press-holding profile 5312 connecting the curved profile 5311. The pressing holding profile 5312 maintains a state in which the trigger 622 is depressed even if the rotating plate 520 rotates a predetermined angle (a). Even if the power supplied to the motor 610 is cut off as soon as the trigger 622 is pressed by the inertia, the rotating plate 520 rotates a little further due to the inertia of the motor 610 and the rotating plate 520 to push the pressing protrusion 530. If is out of the trigger 622, there is a fear that the pressed state of the trigger 622 is released. The pressing holding profile 5312 allows the pressing protrusion to keep the trigger pressed even if the rotating plate rotates a little more due to the inertia of the motor and the rotating plate.

According to an embodiment of the present invention, the operation of rotating the rotating plate 520 once and the operation of opening the lever are linked. Therefore, the one-time rotation control of the rotating plate can be more accurately made by the structure of the pressing and holding profile 5312.

On the other hand, the cam structure of Patent Document 1 described above is heavy because the cam is directly connected to the driving part, and since the 1/5 rotation of the cam and the upward movement of the lever are linked, the rotated cam may not stop in place and may rotate further. If the cam does not stop in place, it is very likely that the cam will not return to its original position even if the door is closed and the latch presses the cam.

The pusher cam 540 has a cylindrical shape extending from the first side of the rotating plate 520 to the first side. As the pusher 500 rotates, the outer circumferential surface of the cylinder of the pusher cam 540 pushes the force point portion 340 of the lever 300 disposed closer to the first side of the rotating plate 520 rearward. .

[Pusher drive part]

Pusher driving unit 600 is fixed to the second side of the holder body 100, the motor 610 coupled to the rotating shaft 510 of the pusher 500 penetrating the holder body 100, and the holder body It is fixed to the first side of the (100), the motor 610 is provided with a return stop switch 620 to control the stop.

The housing 612 of the motor 610 is fixed to the holder body 100, and the rotation drive shaft 611 is coaxially fixed to the rotation shaft 510 of the pusher.

When the user inputs a command to automatically open the door of the cooking appliance, power is supplied to the motor 610 so that the rotation drive shaft 611 rotates. Then, the motor 610 rotates until the pusher protrusion 530 of the pusher presses the trigger 622 of the return stop switch 620. That is, when the trigger 622 of the return stop switch 620 is pressed on the pressing protrusion 530, the power supplied to the motor 610 is cut off. Accordingly, the rotation drive shaft 611 and the pusher 500 start rotating at a position where the push projection 530 presses the trigger 622, and rotate until the push projection 530 presses the trigger 622 again. Is done. Therefore, as in the embodiment, when one pressing protrusion 530 is provided in the circumferential direction, the pusher 500 always stops and rotates once. If the pressing protrusion 530 is provided with two equally spaced circumferential directions, the pusher 500 will always rotate and stop half a turn.

The return stop switch 620 is installed at a position where the switch body 621 does not interfere with the pusher outside the pusher 500, but the trigger 622 may interfere with the push protrusion 530. It is installed in a location.

Controlling the rotation stop point of the pusher 500 with the return stop switch 620 has several advantages. First, the rotation of a predetermined angle (one rotation in the embodiment) is always physically implemented in a very simple structure. And, even if the pusher 500 is stopped during rotation due to a power failure, the pusher 500 is returned to the initial position as long as it is controlled to apply power to the motor 610 so that the pusher 500 rotates when power is turned on again. It is exactly aligned and stops.

[Open detection switch]

The open detection switch 400 is provided in the switch body 410 and the switch body 410 fixedly installed on the fixed wall 151 of the open detection switch fixing part 150 provided below the hook receiving space 180. It has a trigger 420 protruding upward. The trigger 420 is elastically biased to protrude upward when no external force is applied. Therefore, when the external force that pressed the trigger 420 disappears, the trigger 420 protrudes upward.

As described above, in the trigger 420, the latch 200 is accommodated in the hook accommodating space 180 so that the hook part 230 is fixed to the inner inclined surface 112 so that the latch 200 is By the force pressing the push part 330 of the lever, it is pressed by the push part 330. On the other hand, the latch 200 does not depress the push portion 330 due to reasons such as the latch 200 being pulled out of the latch entry / exit hole 110, and the push portion 330 is raised on the trigger 420 alone. In the state, the trigger 420 is not pressed by the push unit 330. That is, the upward force of the trigger 420 is weaker than the force pushed by the latch 200 and stronger than the force pushed by the push portion 330 alone.

The latch 200 may be provided on both sides of the door, and correspondingly, a latch holder having an outer inclined surface 111 and an inner inclined surface 112 which are latching structures of the latch is also opened and closed by the door in the main body of the cooking appliance. It can be disposed on both sides of the opening of the cavity. Accordingly, the open detection switch 400 may also be provided in two places. Therefore, unless the triggers of the two open detection switches 400 are simultaneously pressed, it is possible to determine that the door of the cooking appliance is open and prevent the cooking appliance from operating.

Of course, among the latch holders on both sides, the above-described latch release structure of the present invention including a lever and a pusher may be provided on either side. Therefore, the open detection switch 400 installed on one side of the latch holder is pressed indirectly by the lever 300 when the latch 200 is received, and the open detection switch installed on the other side of the latch holder is latched when the latch is received. Can be pressed directly.

[Operation of the latch holder]

Referring to FIG. 8, in a state in which the hook is accommodated in the hook accommodation space 180, that is, the door of the cooking appliance is closed, the push part 330 of the lever is pressed by the hook, and accordingly, the push part 330 The trigger 420 of the open detection switch 400 is pressed. In this state, the lever 300 is rotated most clockwise around the lever support shaft portion 122.

When the user inputs a command for releasing the hook from the hook accommodation space 180, that is, a door opening command, the motor rotates as shown in FIG. 9 to rotate the pusher 500. The direction of rotation is independent, but in the present invention, it is illustrated that the pusher 500 rotates counterclockwise. As the pusher 500 rotates, the lever 300 is pushed by the pusher cam 540 to rotate counterclockwise around the lever support shaft portion 122. Accordingly, the push part 330 will be lifted forward, and the hook placed on the push part 330 will also be lifted.

When the pusher 500 further rotates and pushes the force point portion 340 of the lever to the rearmost position, and then stops by rotating to the position shown in FIG. 10 again, the lever 300 is rotated by the return spring 630. It rotates clockwise around the support shaft 122 to return to its original position.

[Door unlocking action]

Hereinafter, a process of automatically opening the door by installing the latch holder 10 having the above-described operating principle in the cooking appliance will be described with reference to FIGS. 11 to 14.

The latch 200 used with the latch holder 10 of the present invention, as shown in FIG. 11, is installed to be rotatable up and down about the horizontal pivot shaft 210, but the latch bar elastically biased downward ( 220), and a hook portion 230 extending in a form protruding downward from the tip of the latch bar 220.

The upper tip of the latch 200 is provided with an upper inclined surface 221 in the form of a gentle inclined surface downward toward the tip. The upper inclined surface 221 is an upper wall surface of the latch entry / exit hole 110 when the latch 200 rises by the lever 300 and receives a force forward, for example, when an unexpected obstacle occurs in the opening operation of the door ( 113).

The tip end of the hook portion 230 is provided with a flat tip plane 233, and a lower tip inclined surface 232 of a curved shape is provided below the tip plane 233. In addition, the rear surface side of the hook portion 230 is provided with a rear surface inclined surface 231 that is in contact with the inner sloped surface 112 of the above-described latch entry / exit hole 110.

The shape of the latch 200 may have the same latch provided on the left and right sides of the door.

Even if the lever 300 of the latch holder 10 provided on one side of the door pushes the latch 200 upwardly, the latch provided on the other side of the door does not rotate in conjunction with the latch on the one side. However, since the force to open the door is transmitted to the other side by the force of the lever 300 provided on one side of the door pushing the latch on one side, the rear slope of the hook portion 230 of the latch 200 provided on the other side of the door 231 climbs on the inner sloped surface 112 and is released from the latch holder on the other side.

In addition, the rear inclined surface 231 can also be used to manually open the door. For example, when the user pulls the door forward, the rear slopes 231 of the hooks 230 of the latches provided on both sides of the door climb on the inner slope 112 of the latch entry / exit hole 110 and latch 200 Is released from the latch entry / exit hole 110. The present invention provides a device for automatically disengaging the latch 200 from the latch entry / exit hole 110 by placing the lever 300, the pusher 500, and the pusher driving unit 600 on one side of the latch holder 10 of the main body. However, there are many situations in which a door must be manually opened when a power failure, a cooking appliance malfunction, or the like occurs. Accordingly, in the present invention, the rear sloped surfaces 231 are formed on the hooks 230 of both latches 200 so that the door can be opened manually, and the inner sloped surface 112 and the outer sloped surface 111 are provided on both latch holders. I prepared it.

Referring to FIG. 11, a state in which the hook portion 230 of the latch 200 enters the hook receiving space 180 and the rear sloped surface 231 is hung on the inner sloped surface 112, that is, the door is closed is illustrated. It is done. When the door is closed, the bottom surface of the hook portion 230 is placed on the upper surface 334 of the push portion 330 of the lever 300, and the push portion 330 is opened by the force of the hook portion pressing downward. The trigger 420 of the switch 400 is pressed.

The latch holders 10 are installed on both sides of the main body, and if the doors are normally closed, the open detection switches 400 of the two latch holders 10 are in a depressed state, and accordingly the control unit of the cooking appliance is a door You can see that is closed. Therefore, when the user operates the control panel installed on the front of the door, cooking may start.

On the other hand, when the user inputs a command for opening the door from the control panel installed on the front of the door, the door can be automatically opened. In order to automatically open the door, first, the latch 200 on one side of the door is released from the latch holder 10 on one side of the body, and with this operation, the other latch of the door is also tied to the latch holder on the other side of the body. The state should be released.

To this end, the control unit rotates the motor 610. When the motor 610 rotates, as shown in FIG. 12, the pusher 500 rotates and the pusher cam 540 pushes the force point portion 340 of the lever 300 rearward. Accordingly, the lever 300 rotates counterclockwise around the shaft 310, and the push portion 330 provided in front of the lever 300 moves upwardly. According to the present invention, since the shaft portion 310 of the lever 300 is at the rear upper portion than the push portion 330, when the lever 300 is rotated, the push portion 330 rotates upward.

At this time, since the distance between the shaft portion 310 and the force point portion 340 is longer than the distance between the shaft portion 310 and the push portion 330, the force of the motor 610 is amplified and transmitted to the push portion 330.

Since the push portion 330 orbits and rises relative to the shaft portion 310, the push portion 330 itself rotates slightly. Accordingly, the pushing inclined surface 333 of the push portion 330 is in contact with the lower inclined surface 232 of the latch 200 and lifts the latch 200 upwardly. The extrapolating member 332 of the push portion 330 is preferably made of a smooth and smooth sliding by using a material having high lubricity and high wear resistance. Since the above operation is very sensitive to the trajectory of the lever and the latch, if the material of the push portion 330 is a material having high friction or a material having low abrasion resistance, the latch 200 damages the push portion 330 as well. No, it was confirmed that a situation occurs in which the push unit 330 cannot lift the latch 200.

As the push part 330 rises and the latch 200 is pushed forward and lifted, the trigger 420 of the open detection switch 400 is released.

In addition, the hook portion 230 of the latch 200 moves toward the outer inclined surface 111 beyond the inner inclined surface 112.

When the push portion 330 continues to rise, as illustrated in FIG. 14, the push-out portion 336, which is the bottom edge of the push-up slope 333, pushes the lever 300 farthest, and the latch 200 is lowered and rotated again by elasticity.

The force of the latch 200 that rotates downward is switched to the horizontal direction while riding the outer inclined surface 111, so that the door is opened further forward.

On the other hand, in some cases, for example, when there is an obstacle or the like in the trajectory where the door is opened, and when a larger opening force is required in the direction in which the door is opened, even if the push part 330 rises, the latch 200 cannot move smoothly forward. An action that only rises from the state may occur.

Even in such a case, as shown in FIG. 13, the upper inclined surface 221 of the latch 200 comes into contact with the upper wall surface 113 of the latch entry / exit hole. When the latch 200 is in contact with the upper wall surface 113, when the push part 330 is further raised, as shown in FIG. 13, the pushing part 336, which is the lowermost edge of the final pushing inclined surface 333, is finally shown. Is to push the lever 300 to the farthest. At this time, in the latch 200, the upper inclined surface 221 slides outward while sliding to the upper wall surface 113 of the latch entry / exit hole.

At this time, the upper inclined surface 221 may be in contact with the upper wall surface 113 as a whole, so that the upper inclined surface 221 slides smoothly against the upper wall surface 113 and slides. To this end, when the latch 200 is lifted, the upper inclined surface 221 in contact with the upper wall surface 113 may be approximately horizontal.

If the upper inclined surface 221 is not in full surface contact with the upper wall surface and is slightly inclined in either direction, natural withdrawal may be more difficult than when the upper inclined surface 221 is horizontal.

According to the present invention, when the opening force required for the door is small, the latch 200 behaves in the order of FIGS. 11, 12 and 14 and can be unlocked, and when the opening force required for the door is large Edo acts in the order of FIGS. 11, 12, 13 and 14 and the lock can be released. That is, in any case, there is no problem in the automatic unlocking operation of the door. Therefore, even if there is a deviation in the force that the spring 823 of the hinge module 800 for each product applies in the direction of closing the door and there is a deviation in the opening force that must act on the door for automatic opening, the latch holder of the present invention ( 10) can ensure unlocking of the latch.

In addition, as shown in FIG. 14, in any case, the force of the latch 200 that rotates downward to reach the position where the lock is released by the lever 300 is switched to the horizontal direction while riding the outer slope 111. , Since the door is opened further forward, the door opening operation can be smoothly performed.

Referring to FIG. 20, when the lever 300 rotates about the shaft portion 310, first, the upper end portion of the pushing inclined surface 333 slides with the latch and starts to lift the latch. Subsequently, as the lever 300 further rotates counterclockwise, the position of the pushing inclined surface 333 contacting the latch 200 gradually moves to the lower portion of the pushing inclined surface 333. Then, when the lever 300 rotates further counterclockwise so that the pushing portion 336 rises to the same height as the shaft portion 310, the lever 300 pushes the latch outward most. That is, the pushing inclined surface 333 lifts and pushes the latch 200 in the direction of the arrow shown in FIG. 20.

When the pushing part 336 rises to the same height as the height of the shaft part 310 or goes beyond it, the latch 200 is released from the trajectory of the push part 330. Accordingly, the latch 200 falls downward due to elasticity applied downward as shown in FIG. 14. That is, the latch in contact with the upper wall surface 113 is lowered again. At this time, since the latch 200 is further pushed beyond the horizontal direction of the arrow illustrated in FIG. 20, it is placed on the outer inclined surface 111. That is, the hook of the latch 200 is no longer caught by the inner sloped surface 112, and as the door is opened, the lower portion of the hook portion 230 can ride down the outer sloped surface 111.

Since the push portion 330 is disposed in the lower front portion with respect to the shaft portion 310, as the push portion 330 rises to the same height as the shaft portion 310, the upper end portion of the pushing inclined surface 333 is m more than the original position. It will move forward. According to the present invention, since the lower end inclined surface 232 of the latch 200 slides from the upper end to the lower end of the pushing inclined surface 333, the latch 200 is pushed forward by n more.

In FIG. 1, as shown in FIG. 14, the opening angle a1 in which the door is opened by the latch 200 being pushed outward is illustrated. As the door is not vertical and is inclined by an angle of a1 as shown, the door is opened by itself due to the weight of the door. However, if there is no speed control for the door to open itself by its own weight, there is a fear that the door will open and accelerate and fall. Accordingly, in the present invention, when the door 720 is opened, the damper starts to act at a predetermined angle (a2) and slowly opens to a final controlled opening angle (a3), thereby unreasonably affecting the hinge module (800) of the door. It prevents the door from going and damage the door, and allows the user to feel comfortable watching the process of the door automatically opening.

[Door opening automatically]

When the user inputs a door opening command by touching a display installed on the upper front of the door, the latch holder 10 operates in the order of FIGS. 8 to 10, and accordingly the latches in the order of FIGS. 11 to 14 ( 200) is released from the latch holder 10, the door is pushed by a predetermined angle (a1).

The predetermined angle a1 may be set to such a degree that the door can open itself by its own weight. The angle a1 may be, for example, about 1 to 7 °, and preferably about 1 to 3 °.

15 and 16, the hinge module 800 connecting the main body 710 and the door 720 is a part of a door bar 840 fixed to the door 720 and a main body 710 The housing 810 is rotated based on the opening / closing rotation shaft 814.

As the door bar 840 rotates relative to the housing 810, damping force is transmitted to the door bar 840.

Inside the housing 810, an inner link housing 830 that is movable along the longitudinal direction of the housing is provided. The front end of the inner link housing 830 is hinged to the door bar 840 and the door bar connection hinge 831. Since the door bar connection hinge 831 is eccentric by a distance of r from the opening / closing rotation shaft 814, when the door 720 {door bar 840} is opened, it turns based on the opening / closing rotation shaft 814 and moves forward. Accordingly, the inner link housing 830 also moves forward in the housing 810.

Since the door 720 or the door bar 840 is opened from the vertically standing state to the horizontally lying state, the maximum opening angle a3 is 90 degrees. Accordingly, the connection hinge 831 is also rotated 90 degrees around the opening / closing rotation shaft 814. In addition, the inner link housing 830 is moved forward by the horizontal distance d3 of which the opening / closing rotation shaft 814 pivots 90 degrees.

A spring interpolation pin 820 is installed at the rear of the inner link housing 830. The spring interpolation pin 820 is connected to the rear portion of the inner link housing 830 and the inner housing joint pin 822. In addition, both ends of the inner housing joint pin 822 are fitted into a joint pin guide slot 815 provided in the housing 810. The joint pin guide slot 815 is a shape of a long hole extending along the longitudinal direction of the housing 810.

A compression coil spring 823 having a very strong elasticity is extrapolated to the spring interpolation pin 820 in a compressed state. The spring interpolation pin 820 can slide through the spring locking plate 811 fixed to the housing 810 along the longitudinal direction of the housing 810, but the tip of the compression coil spring 823 is the It is caught by the spring catching plate 811 of the housing 810. In order to support the pressing force of the compression coil spring 823, a support pin 812 additionally supporting the spring catching plate 811 may be further installed in the housing 810.

A spring support pin 821 is installed at a rear end of the spring interpolation pin 820 to fix the rear end of the spring 823. The spring support pin 821 does not interfere with the housing 810.

Therefore, when the door bar 840 is opened, the inner housing joint pin 822 is guided by the guide slot 815 of the housing 810, and the inner link housing 830 and the spring interpolation pin 820 move forward. . Accordingly, the spring 823 is compressed between the spring engaging plate 811 and the spring support pin 821, and the elastic force is gradually increased. The compression length of the spring 823 corresponds to the horizontal movement distance d3 of the opening / closing rotation shaft 814, and when the opening angle of the door is small, the elastic force of the spring 823 is small, but the opening angle of the door is increased. Accordingly, the elastic force of the spring 823 also increases. The elastic force acts in a direction that prevents the door from opening.

The force that the spring 823 pushes in the direction of closing the door becomes larger as the opening angle a1 of the door goes from a1 to a3. In addition, the force of the spring 823 having at the opening angle a1 of the door is smaller than the force (opening force) at which the door automatically opens by the weight of the door at the opening angle a1, so that the lever 300 reaches the opening angle a1. The pushed door is set to open by itself.

A damper 850 is installed inside the inner link housing 830. The piston 851 of the damper 850 is supported by a damper pressing surface 832 integrally fixed to the inner link housing 830. A cylinder 852 is extrapolated to the piston 851. The upper portion of the cylinder 852 is provided with a slot 853 into which a damper support pin 813 fixed to the housing 810 is fitted. That is, the cylinder 852 can move back and forth by the length of the slot 853. In FIG. 16, the position between the slot 853 of the damper 850 and the damper support pin 813 of the housing 810 in the closed state is disclosed.

As the door is opened and rotated by a predetermined angle (a2), the inner link housing 830 moves horizontally forward by d2, whereby the damper 850 is also a damper pressing surface 832 of the inner link housing 830. ) To move forward and move together. As the damper is pushed forward, the damper pressing surface 832 pushes the piston 851 of the damper 850 forward, but the slot 853 of the cylinder 852 is not yet caught by the damper support pin 813. Therefore, the damper 850 moves forward with the inner link housing 830, but does not generate any damping force.

At the moment when the opening angle of the door exceeds a2, the slot 853 of the damper 850 moving forward is caught by the damper support pin 813, and accordingly, the damper 850 starts to be compressed. The damping force generated by the damper 850 being compressed causes the door to be damped and opened in the opening angles a2 to a3.

The maximum damping distance (Lmax) inherent to the damper 850, that is, the maximum stroke capable of reducing the damper and generating the damping force, is the distance (d3-d2) that the inner link housing 830 moves while the damping force is applied to the door. ) Or higher.

Specifically, while the closed door is opened up to a2, the door bar connecting hinge 831 also rotates by a2, and accordingly, the inner link housing 830 and the spring interpolation pin 820 move forward by d2. While moving by a distance of d2, the slot 853 of the damper 850 moves on the damper support pin 813, so that the damper is not pressed. That is, in the section where the opening angle of the door ranges from 0 to a2, the elastic force of the spring 823 acts in the opposite direction to the opening force of the door to control the opening speed of the door.

While the closed door is opened up to a3, the door bar connecting hinge 831 also rotates by a3, and accordingly, the inner link housing 830 and the spring interpolation pin 820 move forward by d3. That is, accordingly, the spring 823 is compressed by d3. That is, the elastic force of the spring 823 acts in the opposite direction to the opening force of the door until the opening angle of the door reaches from 0 degrees to a3 to control the opening speed of the door.

The maximum opening angle (a3) may be regulated by the joint pin guide slot 815 of the housing 810 that regulates the slide movement distance of the inner housing joint pin 822.

The angle range in which the damper 850 attenuates the opening force of the door may be started, for example, when the door is about 30 ° to 40 °, and may be continued until it is approximately 90 °. Then, the door is opened by the latch holder 10 up to the initial opening angle (a1), and then slowly opened by acceleration due to its own weight, and then slowly opened by receiving the damping force of the damper when it becomes about a2 (about 30 ° to 40 °). Can be. This way of opening the door makes the user feel secure.

If the damping starts too early as the door opens, the waiting time for the door to open becomes too long, causing inconvenience. On the other hand, if the attenuation of the door starts too late, the door opens too quickly to the extent that the door opens to a considerable level, which may surprise or discomfort the user, and may cause an injury by hitting the fast-opening door.

In this regard, the damping rush angle a2 at which the damper 850 starts damping the opening force of the door is preferably 35 ± 5 °.

In addition, the damping force may last up to 90 ° when the door is completely opened, or 85 ° smaller than 5 °. It is also conceivable that the damping force does not act after 85 °, in order to dispel the fear that the door will not open completely and will open 1 to 2 ° less if the damping force is applied to the full opening of the door.

As such, the damping intrusion angle a2 is set larger than the forced opening angle a1. And the section between the forced opening angle (a1) and the damping intrusion angle (a2), i.e., 1 ° to 7 ° to 30 to 40 °, is a section in which the door does not attenuate by any damper 850 and opens itself by its own weight. It becomes. Of course, even in this section, since the elastic force of the spring 823 described above acts in a direction to prevent the door from opening, the phenomenon that the door suddenly accelerates in the section opened by itself is sufficiently prevented.

When the door automatic opening structure is applied, user anxiety may be reduced, quality sensitivity may be increased, and a handle protruding toward the front of the door may be deleted, thereby providing excellent aesthetics, especially when installing a door.

[Door auto open operation]

A damper used for a door of a building is a mechanical element installed to prevent the door from closing tightly by applying a spring in the direction in which the door closes. The elastic force of the spring that exerts a force in the direction in which the door is closed is greatest when the door is opened at the maximum angle, and becomes smaller as the door moves in the direction of closer closing. Therefore, if a damper capable of exerting an appropriate level of damping is installed, as the door gradually closes, the elastic force of the spring applied in the direction of closing the door becomes weaker, so the damping force of the damper has more influence on the closing speed of the door. , The closing speed of the door is gradually reduced.

On the other hand, if the damper is closed during the operation process in which the door is opened in a pull-down manner as in the present invention, the opening force to open the door is composed of moments due to the weight of the door. Therefore, unlike the conventional doors, the automatic door opening system of the present invention is different in that the damping force increases as the damper progresses.

Referring to FIG. 19, the opening force exerted by the weight of the door may be defined as a sine function for the opening angle of the door. On the other hand, the open holding force by the spring 823 may be defined as a first order function for the spring constant. The damping force of the damper is proportional to the speed of the damping motion, but in the present invention, the door is controlled to drop at a substantially constant speed, so the damping force of the damper can be expressed in a constant form.

That is, the damping force acts constant regardless of the opening angle of the door. Therefore, in order to provide a sufficient damping force against a large opening force acting at the time when the door opening is completed, the damping coefficient of the damper must be very large. However, if the damping coefficient of the damper is large, the damping force that blocks the opening force in the initial opening stage increases, so the initial opening operation is very slow or the initial opening operation is not smoothly performed. That is, if the damping force Fd1 of the damper is too large, the initial opening operation is not smooth, and if the damping force Fd1 of the damper is small, the damping force cannot cover the increasing opening force as the opening angle increases.

Accordingly, the present invention proposes a method of designing the hinge modules 800 applied to the two hinge portions of the pull-down door differently. For example, the damper 850 installed in one of the hinge modules 800 is designed as shown in FIG. 16, and the damping starts with the first damping force Fd1 at the damping intrusion angle a2 at a faster time point, and the other The damper 850 installed on the hinge module 800 of the side is designed as shown in FIG. 17 or 18, so that the damping starts with the second damping force Fd2 at an additional damping intrusion angle a2 'at a later point in time. Is to do.

According to this, the damping force (Fd1 + Fd2) that can attenuate the increased opening force sufficiently with entering the additional damping intrusion angle (a2 ') increases, so as the opening angle of the door increases It is possible to sufficiently cover the increase in the opening force that could not be handled by a single damper.

The additional damping intrusion angle (a2 ') may be about 60 ~ 80 °, that is, about 70 ° ± 10 °.

Referring to FIGS. 16 and 17, in contrast to the hinge module 800 of FIG. 16 in which attenuation starts at the attenuation incidence angle a2, the hinge module in FIG. 17 where attenuation starts at the additional attenuation intrusion angle a2 ' 800, the slot 853 of the cylinder 852 of the damper 850 may have a longer length (d2 '). Both hinge modules 800 of FIGS. 16 and 17 have the same distance (r) between the opening / closing rotating shaft 814 and the door bar connecting hinge 831, so that the inner link housing 830 moves (d3) Are the same as each other. However, since the lengths of the slots 853 are different, sections d2 and d2 'in which the inner link housing 830 moves in a state in which the damping force of the damper does not act are different from each other.

In addition, since the hinge module of FIGS. 16 and 17 has the same distance (r) between the opening / closing rotation shaft 814 and the door bar connecting hinge 831, the damping force generated for the same opening angle is the same. That is, it can be said that Fd1 and Fd2 in FIG. 19 are substantially the same as each other.

On the other hand, referring to Figures 16 and 18, in contrast to the hinge module 800 of Figure 16, attenuation starts attenuation incidence angle (a2), the hinge of Figure 18 attenuation starts at the additional attenuation intrusion angle (a2 ') The module 800 may have a shape in which the distance r 'between the opening / closing rotation shaft 814 and the door bar connection hinge 831 is further reduced. If the distance r 'between the opening / closing rotation shaft 814 and the door bar connecting hinge 831 is shorter, the distance d3' at which the inner link housing 830 advances further decreases until the door is completely opened. That is, as the distance r 'between the opening / closing rotating shaft 814 and the door bar connecting hinge 831 is reduced, the distance d3' at which the inner link housing 830 advances for the same opening angle is further reduced.

Both hinge modules 800 of FIGS. 16 and 18 have the same length (d2) of the slot 853 of the cylinder 852 of the damper 850, so the inner link housing 830 must move to generate damping force. The distance d2 to be said is the same. However, since the distance between the opening / closing rotating shaft 814 and the door bar connecting hinge 831 is different, the door 720 or the door bar 840 is moved to move the inner link housing 830 by the same distance d2. There is a difference between the angles to be rotated. That is, in the hinge module 800 structure of FIG. 16, if the opening angle of the door to be rotated to move the inner link housing 830 by d2 is a2, the inner link housing 830 in the hinge module 800 structure of FIG. ), The opening angle of the door to be rotated to move by d2 is a2 '.

On the other hand, in contrast to the hinge module of FIG. 16, the hinge module of FIG. 18 has a shorter distance (r ') between the opening / closing rotating shaft 814 and the door bar connecting hinge 831, so that the damper is damped for the same opening angle. The distance is shorter, and the resulting damping force is also reduced. That is, the hinge module of FIG. 18 has a smaller damping force generated by rotating the same opening angle as compared to the hinge module of FIG. 16. In other words, Fd2 is smaller than Fd1 in FIG. 19.

As can be seen from the relationship between the hinge modules of FIGS. 16 and 17, and the hinge modules of FIGS. 16 and 18, the damping angles of the hinge modules installed on both hinge portions of the pull-down door are different from each other, and become larger. It is possible to provide a damping force that can counteract the opening force of the door.

The difference in the attenuation incidence angle is applied to the same hinge module structure, but the length (d2, d2 ') of the slot 853 of the cylinder is different, or the distance between the opening / closing rotating shaft 814 and the door bar connecting hinge 831 (r, r ') can be adjusted by varying. In addition, the magnitude of the damping force (Fd1, Fd2) given when rushing to the two attenuation angles (a2, a2 ') can also be adjusted by varying the distances (r, r') between the door bar connection hinges (831).

Therefore, even if the opening force varies depending on the weight or size of the door, the length (d2, d2 ') of the slot 853 of the cylinder of the hinge module installed on both sides is different, without having to redesign the hinge module each time. , It is possible to provide an optimal damping force capable of countering the opening force of the door, which is getting larger, by only changing the distance (r, r ') between the opening / closing rotating shaft 814 and the door bar connecting hinge 831. Do.

And, in addition to applying different damping forces and damping inrush angles, the spring constant of the spring 823 (the slope of FIG. 19) and the initial compression degree of the spring (the initial value of the elastic force graph of FIG. 19) are additionally adjusted, thereby It is possible to design in which the door can be opened at a controlled speed against the opening force. In addition, the spring constant and the initial compression degree of the spring are adjusted to be equal to or less than the opening force generated by the weight of the door at the initial opening angle (a1; the angle at which the latch holder pushes the latch to open the door). desirable. The double-dashed line in FIG. 19 represents the resistance to the opening force generated by the damper and the spring by adjusting the damping force and the spring constant.

[How to control automatic door opening operation]

Hereinafter, a control method of an automatic door opening operation according to the present invention will be described in detail with reference to FIGS. 21 to 23.

According to the present invention, the automatic opening operation of the door is made by one rotation of the motor 610. While the motor rotates for one revolution, the pusher 500 rotates, and accordingly the pusher cam 540 eccentrically disposed in the pusher pushes the lever 300 and then returns to the original position. The lever 300 pushes the latch 300 upward by the pusher cam 540, and accordingly, the door is automatically opened.

Due to the structure of the above-described latch holder 10, the latch holder may exist in four main states when the power of the cooking appliance of the present invention is turned off.

First, as illustrated in FIG. 11, the door is closed so that the latch 200 maintains a locked state within the latch holder 10, and the lever 300 moves most clockwise by the downward pressing force of the latch 200. This is the case when it is arranged in a state and the pusher 500 is in a fixed position in which the return stop switch 620 is pressed.

The second case is a state in which the door is open as shown in FIG. 10, and the pusher 500 is aligned in the right position and depresses the return stop switch 620.

Third, the pusher 500 stops turning due to a problem such as a power failure, and the pusher 500 is out of a state in which the return stop switch is pressed, as shown in FIG. 9, and the pusher 330 of the lever 300 It is heard, and the door is open. In the state as shown in FIG. 9, since the push part 330 of the lever 300 blocks the entrance of the latch holder 10, the latch 200 cannot enter the latch holder, and thus the door cannot be closed. .

Fourth, between the state of FIG. 9 and the state of FIG. 10, that is, in a state in which the push portion 330 does not block the entrance of the latch holder 10 and slightly lower than that, the pusher protrusion 530 of the pusher returns the stop switch ( 620) is in the initial state without pressing. In this case, the latch 200 may come into the latch holder. When the latch comes into the latch holder, the load of the latch presses the lever, so the lever is forced to rotate, the lever rotates, and the pusher 500 By moving it, it eventually changes to the state shown in FIG. 11.

According to the present invention, the pusher 500 is rotated once, and the opening operation of the door is made, and the pusher 500 is controlled to rotate one rotation by starting to rotate from a fixed position, that is, the position of FIG. 11. As such, when the pusher 500 is rotated once, the push portion 330 of the lever 300 is correctly lifted once, thereby automatically opening the door. If the pusher 500 is not in the correct position and the rotation of the pusher 500 for the door opening operation starts in the state shown in FIG. 9, the reliability of the door automatic opening operation is deteriorated.

Accordingly, in the present invention, when the cooking appliance is first started, for example, when the user connects the power plug of the cooking appliance to the outlet, or when the user presses the power button of the cooking appliance to turn on the power, the pusher 500 is positioned. To perform the motion control.

11 or 10, when the pusher 500 already pushes the return stop switch 620 to send a signal that the return stop switch is on, it is confirmed that the push stop 500 is already in the correct position, so that the pusher 500 is properly positioned. There is no need to do any sorting operations. Rather, if the pusher 500 is rotated for alignment in a state in which the door is closed as shown in FIG. 11, a problem in which the closed door is opened may occur.

In this state, the user is kept waiting until the user inputs the door open command.

On the other hand, as shown in Figure 9, the pusher 500 is in a state where the return stop switch 620 is pushed away, it is expected that the door is open anyway, even if the pusher is rotated to align the pusher 500. In other words, an abnormal operation phenomenon such as opening of a door in which the user has closed the door does not occur.

That is, when the cooking appliance is started (a situation in which the power is connected or the power button is turned on), if it is detected that the return stop switch is in an off state, that is, in a non-pressed state, alignment of the pusher 500 shown in FIG. 22 is performed. do.

The initial alignment procedure is, first, to supply power to the motor. According to the control method of the present invention, the motor is driven by supplying a normal continuous power (which may be an alternating power) without supplying a power source (pulse power, etc.) that causes the motor to rotate different from the normal rotation.

When power is supplied to the motor, the motor rotates. Accordingly, when the pusher 500 is rotated to reach a position as shown in FIG. 10, the power supplied to the motor is cut off by the return stop switch 620 being pressed, and accordingly the pusher is aligned in the correct position.

The controller checks whether the return stop switch is pressed after a time (t ₀ ) sufficient for the motor to rotate one revolution. If it is confirmed that the return stop switch is pressed, it can be confirmed that the motor is operating normally, the return stop switch is also operating normally, and the pusher 500 is aligned to the initial fixed position. When this state is confirmed, the standby state is maintained until the user inputs a door open command as described above.

If it is not confirmed that the return stop switch is pressed even after the time t ₀ has passed, it may be determined that the motor or return stop switch is abnormal. As described above, since the door cannot be closed in the state as shown in FIG. 9, the open detection switch 400 is in an off state, and because the door is open, whether or not the door is opened by movement of the motor It is difficult to check whether the motor is operating normally. Then, the control unit may generate a fourth error signal indicating that there is an abnormality in the motor or the return stop switch. In addition, the operation of the cooking appliance may be terminated as a follow-up measure.

After the pusher 500 is aligned in position, it is expected that all of the states waiting for the user's door opening command are in the same state as in FIGS. 10 or 11. Even if the pusher 500 is rotated once when the door opening command is input in the state shown in FIG. 10, that is, the door is open, there is no problem in the operation of the product.

Of course, in the state as shown in FIG. 10, that is, the return stop switch is pressed, but the open detection switch is not pressed, the user may be prevented from supplying power to the motor even if the user inputs a door opening command. However, for simplification of the control algorithm, it is remarkable that the state of FIGS. 10 and 11 is not required to respond to the door opening command.

In the present invention, it will be more helpful to understand the door auto open operation control method of the present invention, noting that the door can be opened automatically or manually.

If power is supplied to the motor by the user's door open command input, after a while, check whether the return stop switch is turned off. If the return stop switch is turned off, it can be confirmed that the motor has started to rotate normally.

Then, after a time (t ₀ ) sufficient for the motor to rotate one day, check whether the open detection switch is off. If the state was as shown in FIG. 11, the open detection switch, which was on when the door was opened, would be switched to the off state. If the state was as shown in FIG. 10, the open detection switch would be continuously off. Therefore, regardless of any case, when it is confirmed that the open detection switch is in an off state after the predetermined time has passed, it is possible to confirm that the latch has been normally released from the latch holder.

Next, after sufficient time for the motor to rotate one day, check whether the return stop switch is turned on again. If the motor has returned to its original position normally, the return stop switch is pressed, and accordingly, it can be confirmed that the return stop switch is operating normally. In addition, when the return stop switch is pressed, the power supplied to the motor is immediately cut off, so it can be confirmed that the pusher is also positioned at the initial position.

At this time, the control unit is again in a state of waiting for a user's door opening command.

On the other hand, if the return stop switch does not switch to the on state even after a sufficient time for the motor to rotate one day, it may be expected that the motor or return stop switch is abnormal.

If the open detection switch has been switched from the on state to the off state during the predetermined time (that is, the door has been confirmed to be open), if the return stop switch does not switch to the on state after a certain time has elapsed, the return stop switch is abnormal. Can be detected. If it is determined as described above, a second error signal indicating that there is an abnormality in the return stop switch may be generated, and power supplied to the motor may be cut off.

On the other hand, if the door has already been opened and the open detection switch has been continuously turned off for the predetermined time, it may be difficult to clearly determine whether there is an abnormality between the motor and the return stop switch. However, since it is confirmed that the return stop switch has been switched from the on state to the off state once the power is supplied to the motor, it is more likely that an abnormality has occurred in the return stop switch than the motor. Therefore, if it is determined as described above, a second error signal indicating that there is an abnormality in the return stop switch may be generated, and power supplied to the motor may be cut off.

That is, in any case, if the return stop switch is not switched to the on state, it may be confirmed that there is an error in the return stop switch and a second error signal may be generated.

On the other hand, even though the power is supplied to the motor by the user's door opening command input and the return stop switch is switched to the off state, even after a sufficient time (t ₀ ) for the motor to rotate one day, the open detection switch In the on state, the motor is rotating normally, but there is an obstacle in the direction in which the door is opened, preventing the door from opening, or the door latch is caught in the wrong shape by the latch holder, so the door cannot be properly opened. Therefore, it is possible to generate a first error signal informing of the abnormality of the latch operation and cut off the power supplied to the motor.

On the other hand, if the return stop switch is not switched to the off state despite the power being supplied to the motor by the user's door opening command input, the error signal generation step as shown in FIG. 22 may be entered. That is, at this time, it is clear that there is an abnormality in either the motor or the return stop switch. However, it is possible to check whether there is an abnormality between the motor and the return stop switch by checking additional signals.

This can be confirmed based on whether the door is opened as shown in FIG. 23. That is, when the power was supplied to the motor, the open detection switch was in the on state, that is, the door was closed. If the open detection switch was switched to the off state after a predetermined time, the door can be regarded as open. This results in the motor being normal. Therefore, in such a situation, it is determined that there is an abnormality in the return stop switch, and a second error signal is generated and the power supplied to the motor is cut off and then terminated.

On the other hand, when the power was supplied to the motor, the open detection switch was in the on state, that is, the door was closed. If the open detection switch is still on after a predetermined time, it can be understood that the door is still closed. This results in the motor being abnormal. Therefore, in such a situation, it may be determined that there is an abnormality in the motor, and a third error signal may be generated and the power supplied to the motor may be cut off and terminated.

However, since the open detection switch is off from the point when the motor is already supplied with power, that is, when the door is open, it is difficult to check whether the motor is operating through the open detection switch. A fourth error signal indicating that one has failed is generated, the power supplied to the motor is cut off, and control can be terminated.

According to the above-described control method, in addition to the conventional continuous AC power supplied to the cooking appliance, other types of power are generated and supplied to the motor, and the conventional power is supplied to the motor.

In addition, without installing a separate sensor for detecting whether the motor is operating, the return stop switch, which is anyway necessary to determine the stop position of the motor, and the configuration that has been used in the past to confirm whether the door is open or not It is possible to monitor whether the automatic opening structure is operating normally by using the signal of the open detection switch.

[How to automatically open the door]

Hereinafter, a control method for automatically opening a door of a cooking appliance according to the present invention will be described with reference to FIG. 24.

The proximity sensor 764 operates when the door 720 is closed, and operation may stop when the door is opened. When the door is closed, the proximity sensor periodically detects whether there is a person in front of it. While a person is being detected, the proximity sensor generates a signal indicating that a person is detected and transmits it to a control unit such as a micom.

When the proximity sensor 764 does not detect that a person is in front of the cooking appliance, that is, when there is no person in front of the cooking appliance, the open command input unit 762 is deactivated and the light 763 is also turned off. , The display 761 also remains off. In this state, the "door open" mark of the outer glass is also inconspicuous, and the display is also inconspicuous.

When a person approaches or detects that a person is within the activation distance (b1; see FIG. 1) in front of the cooking appliance by the proximity sensor 764, the open command input unit 762 is activated and the light 763 is turned on. , The display 761 is also turned on. In this state, the “door open” mark of the outer glass is clearly visible, and the display is also visible through the outer glass 722.

Therefore, a person who approaches the front of the cooking appliance to operate the cooking appliance can intuitively know that the command is input by viewing the display and lighting, and accordingly touch the display to input a command or to open the cooking command. The door may be automatically opened by touching the input unit 762.

The open command input unit 762 and the light 763 may operate in conjunction with each other. That is, when the open command input unit 762 is activated, the light 763 may also be turned on, and when the open command input unit 762 is deactivated, the light 763 may also be turned off. This interlocking method allows the user to intuitively know whether the open command input unit 762 is activated.

It is also possible to provide a power button (not shown) in view of the case where a person is in front of the cooking appliance for another job and does not intend to operate the cooking appliance. The power button may be a hardware switch or an image sprayed on the display 761. When a person presses a power button in a state in which the display and the lighting are turned on (the open command input unit is activated), the display 761 and the light 763 are turned off and the open command input unit 762 is deactivated. In the situation where the power button can be pressed, when the user completes all operations on the cooking appliance and leaves the front of the cooking appliance, the user accesses the cooking appliance, but there is no intention to use the cooking appliance, so the display and open command inputs are turned off. If you want, etc. will be scheduled.

Even if the power button is pressed, when the proximity sensor immediately detects a person, there is room for the display and the open command input unit to operate again. Therefore, when the user presses the power button, the display and the open command input unit remain turned off for a predetermined time. These functions can be implemented in a variety of ways, such as implementing the proximity sensor by inactivating it for a few seconds, such as 5-10 seconds, or by directly controlling the display and open command inputs to remain off for about 5-10 seconds. It is possible to implement After the waiting time of about 5 to 10 seconds, the proximity sensor may be reset to operate again.

On the other hand, when the proximity sensor 764 senses that a person approaches the front of the cooking appliance, and the user touches the activated open command input unit 762, the latch holder 10 operates.

When the latch holder 10 is operated, as shown in FIG. 12, the door 720 rotates open forward about the rotation axis of the lower end. In the case of a cooking appliance such as an oven, since the hinge module 800 presses the door 720 in the closed direction, the latch module 10 has the force that the door tries to open due to the weight of the door 720 elastic elastic force of the elastic body The door 720 is forcibly opened to an angle a1 greater than the force.

After the door is forcibly opened up to the initial opening angle a1, the door is opened by itself due to its own weight.

Referring to FIG. 24, after the door is opened as described above, the display 761 is turned off and the open command input unit 762 can be deactivated. In the state that the display and the open command input unit are downwards in the state in which the door is opened, operation is impossible anyway, so that the display is turned off to increase the power saving efficiency, and the display is touched by an unexpected operation so that unwanted commands are input to the cooking appliance. Can be prevented. For the same reason, the proximity sensor can be turned off after the door is opened.

The proximity sensor may restart when the door is closed again, and when the door is closed, the display and the open command input unit may be turned on again because there is a person in front of the cooking appliance.

Whether the door is closed can be checked through the open detection switch 400.

On the other hand, when the proximity sensor detects that there is a person in front of the cooking appliance and the display is turned on, the display is turned off when a predetermined waiting time (for example, 5 minutes) has elapsed in a state in which the user has not operated the touch screen or the like. It can be turned off automatically to increase the power saving efficiency. This control prevents wasting power as the display stays on when the user is doing something else and staying in front of the cooker.

Meanwhile, if the user touches the display within the predetermined waiting time, the waiting time is reset and restarted. 25 shows an embodiment of the display. When the user approaches and recognizes the user while the screen is normally turned off as shown in (a) of FIG. 25, a welcome screen appears as shown in (b), and the current time and date may be displayed.

Subsequently, when the user touches the screen, the waiting time is initialized and restarted, and a first menu screen for selecting a type of dish appears as shown in (c). Then, when the user selects an appropriate command on the first menu screen, the standby time is initialized and restarted, and the second menu screen appears as shown in (d). That is, even in the welcome screen, the first menu screen, and the second menu screen, the waiting time progresses, and the display is turned off when the waiting time passes without any manipulation.

In addition, even in the first menu screen and the second menu screen, when the user presses the power button, the display and the lighting are turned off and the open command input unit can be deactivated as described above. Similarly, even in the first menu screen and the second menu screen state, when the user presses the open command input unit, that is, the “door open” button, the door may be opened.

On the other hand, when the cooking execution buttons k such as "run cooking", "start cooking" and "START" are pressed on the second menu screen, the oven starts to operate. When the oven starts to operate, the red door LED unit 768 described above is turned on, and red light is irradiated from the top surface of the door to the top. This allows the user to clearly and intuitively recognize that the oven is operating.

On the other hand, the user may open and close the oven even while cooking is in progress. If the proximity sensor detects that there is a person in front of the cooking appliance, the open command input unit is activated. It can be opened automatically.

When the door is opened during cooking, the door LED unit 768 is turned off, so that the user does not have a surprising or dangerous feeling when viewing the red light.

In addition, as described above, the door is provided with a knock-on sensor 765, so that when the user knocks on the surface of the door, particularly the inside of the cooking compartment, a light illuminating the inside of the cooking compartment is turned on so that the inside can be seen from outside the cooking appliance. You can.

Such a function may be performed while cooking and when not cooking, so that when the user wants to see the inside of the cooking chamber, a knock can be made so that the inside can be seen without opening the door.

On the other hand, it is natural that the cooking appliance has a child protection function.

The door 720 is automatically opened when a user inputs an open command through the open command input unit 762. However, when the user is in the trajectory where the door is opened, if the door starts to open at the same time as the open command or the opening speed is high, there is a fear that the user may be surprised or bump into the door. According to an embodiment, the opening time of the door 720 may be controlled or the opening speed of the door 720 may be controlled according to a user's location. The opening time of the door 720 may be achieved by the operation of the latch holder 10. The opening timing control method can be mainly used for pull-down doors. Adjusting the opening speed of the door 720 may be implemented by adding a variable damping structure (not shown) to the hinge module 800 or by adding a motor (not shown) capable of applying rotational force in the opening direction or vice versa. have. In particular, the speed control of the opening of the door can be mainly used for swing doors.

Referring to FIG. 26, the proximity sensor 764 of the door detects whether a person has approached the front of the main body 710 and how far the person is. In addition, the proximity sensor 764 provides the distance information to the control unit 77. The controller 77 may activate the open command input unit 762 and turn on the light 763 when the user is within the activation distance b1 (see FIG. 1) based on the distance information received from the proximity sensor 764. Alternatively, the open command input unit 762 may always remain activated, and the light 763 may be turned on when the user is within the activation distance.

The proximity sensor 764 continuously detects the user's distance and provides the signal to the control unit 77. The proximity sensor 764 may perform sensing at predetermined time intervals. The proximity sensor 764 may provide the control unit 77 with distance information sensed at a predetermined time interval.

The control unit 77 performs control based on the user's distance provided from the proximity sensor 764. Referring to FIG. 1, the distance measured from the main body forward may be classified in the order of the ultra-close distance (c1), the normal open distance (c2), and the distance (c3). The normal opening distance c2 may be further divided into a proximity distance c21 and a basic distance c22. The proximity distance c21 is a section closer to the main body 710 than the basic distance c22.

The ultra-close distance c1 may be set to a distance at which a person has no spare time to avoid the door when the door 720 starts to open when the person is within the corresponding distance, and thus has a high possibility of colliding with the door.

Proximity distance (c21) is a position farther than the super close distance (c1), when a person is at that distance, when the door 720 starts to open, a person recognizes that the door is open and retreats back so as not to hit the door. It can be set to a distance with a spare time. The basic distance (c22) is a position farther than the close distance (c21), and may be a distance that a person has sufficiently approached the cooking appliance to input an open command to the open command input unit 762, and the door that is opened even when the door is opened May be a position that does not collide.

The long distance c3 is a position farther than the basic distance c22, and is a long distance that it is determined that a person cannot input an open command to the open command input unit 762.

Referring to FIG. 1, the door 720 is automatically opened by its own weight from the initial opening angle a1 to the damping intrusion angle a2, and damping by the damper is not performed. According to an embodiment, the ultra-close distance c1 may be set as a section from the main body 710 to a distance d2 at which the door is opened from the main body at the moment the door reaches the attenuation intrusion angle a2. .

Referring to FIG. 1, the door 720 is opened at a controlled speed while receiving attenuation from the damping intrusion angle a2 to the full opening angle a3. According to the embodiment, the proximity distance (c21) is the door is opened from the distance (d2) from the body at the moment the door reaches the damping intrusion angle (a2), the door reaches the fully open angle (a3), the door from the body It may be set as a section up to the distance d3 of the farthest open position.

That is, the ultra close distance (c1) and the close distance (c21) may be defined as a section overlapping with the opening trajectory of the door from the main body. When there is a person in the section overlapping with the opening trajectory of the door, the person does not collide with the door until the person steps away from the opening trajectory. If the super close distance (c1) can be understood as a distance that is difficult for a person to avoid the door when the door is opened, the close distance (c21) is when the person confirms this and steps back when the door starts to open. You may understand that it is a sufficient distance to avoid the door. Accordingly, when there is a person at the super close distance c1, the door may not be opened, and when there is a person at the close distance c21, the door may be controlled to be opened.

The basic distance c22 can also be controlled to open the door. That is, the normal opening distance c2 including the proximity distance c21 and the basic distance c22 may be controlled to open the door. The distance b3 of the position where the door is opened farther forward from the main body 710 may be within the normal opening distance c2.

The long distance c3 is a distance far from the main body so that the user determines that the open command cannot be input. Accordingly, if the distance of the person sensed by the proximity sensor at the moment when the open command is input is the remote distance c3, it may be determined that there is an error in either the open command input signal or the proximity sensor.

Since the ultra close distance c1 and the remote distance c3 can protect the user or determine that there is an error in the open command input signal, the door may not be opened even if an open command is input.

The activation distance b1 is a greater distance from the body than the normal opening distance c2. The range of the activation distance b1 may be a distance that is slightly far from the user inputting an open command, but can be determined by the user as approaching the cooking appliance.

Hereinafter, a method of controlling the opening of a specific door will be described.

The proximity sensor 764, the open command input unit 762, and the display 761 and the automatic opening module 10 may be electrically connected to the control unit 77 and / or may be connected to send and receive signals. The proximity sensor 764 may be controlled to be operated by the controller 77, and the proximity sensor 764 may signal the detected distance and provide it to the controller 77. Whether the open command input unit 762 is operated by the control unit 77 may be controlled, and the open command input unit 762 may provide an open command signal input by the user to the control unit 77. The latch holder, that is, the auto-opening module 10 may detect whether the latch is inserted (door closed) and provide it to the control unit 77, and the control unit 77 operates the auto-opening module 10 The door can be opened.

The proximity sensor 764 may operate while the home appliance is powered and the door is closed. The proximity sensor may continuously operate, and may perform sensing operations at predetermined time intervals.

When a door open command is input through the open command input unit 762, the control unit 77 receives the measured distance of the person from the proximity sensor 764 at the moment the door open command is input, and determines in which section the distance is do.

When the control unit receives the door opening command input signal, if the user's distance provided from the proximity sensor is the normal opening distance c2, the control unit performs the door opening operation to the automatic opening module 10.

However, in performing the opening operation of the door, the opening operation may be performed immediately, or may be performed after a delayed time. If the determined user's distance is the basic distance c22, the open operation can be performed immediately. If the determined distance of the user is the proximity distance c21, an open operation may be performed after a delayed time. Therefore, when there is a person at a close distance, the user can provide time to anticipate the opening of the door and retreat.

On the other hand, when the door of the cooking appliance is a swing type, in performing the opening operation of the door, the opening operation may be performed at a first speed or may be performed at a second speed that is slower than the first speed. If the determined distance of the user is the basic distance c22, the open operation may be performed at a normal first speed. If the determined user's distance is the proximity distance c21, the open operation may be performed at a second speed that is slower than the normal first speed. Therefore, when there is a person at a close distance, the user can provide the time to anticipate the opening of the door or to recognize that the door is starting to open and to step back.

The opening timing delay control or the opening speed differential control may be selectively or may be achieved.

When the controller receives the door open command input signal, the controller does not open the door if the distance of the user provided from the proximity sensor is not the normal opening distance c2.

When the control unit receives the door open command input signal, if the user's distance provided by the proximity sensor is the super close distance (c1), when the door is opened, there is a concern that the user may hit the door. 761) may generate an alarm informing the user to step back. Proximity sensor 764 continues to detect the user's distance. Then, when the user steps back and is located at the normal opening distance c2, when the sensed user's distance deviates from the ultra-close distance c1 and becomes the normal opening distance c2, the door is opened.

On the other hand, when the controller receives the door open command input signal and the user's distance provided by the proximity sensor is a long distance (c3), the controller may ignore the door open command signal. That is, when it is determined that the user's location is a long distance, the door open command input signal provided to the control unit may be determined to be an error, and it may be determined that there is no door open command input signal. Therefore, the door is not opened.

This may be more useful when the open command input 762 is a motion sensor. When the open command input unit 762 is a motion sensor, there is a possibility that the open command input unit 762 detects a user moving at a long distance c3 as a motion and transmits a door open input signal to the control unit 77. At this time, if the distance of the user measured by the proximity sensor 764 is a long distance c3, the controller 77 may determine that the door opening command is an error and ignore it.

Even if the user recognizes that the opening command is input even when the user is at a long distance c3, since the door opening command itself is determined to be an error, there is no door opening command. Therefore, even if the user approaches the normal opening distance c2, the door is not opened. That is, when the control unit 77 receives the signal that the door opening command has been input from the open command input unit 762, the distance of the user transmitted from the proximity sensor 764 is the ultra-close distance c1 and the distance c3. Cases can be treated very differently.

According to the door opening control method as described above, even if the door is automatically opened, it is possible to prevent a phenomenon such as a user hitting the door or being surprised by an operation in which the door is opened.

As described above, the present invention has been described with reference to the exemplified drawings, but the present invention is not limited by the examples and drawings disclosed in the present specification, and can be varied by a person skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made. In addition, although the operation and effect according to the configuration of the present invention has not been explicitly described and described while explaining the embodiment of the present invention, it is natural that the predictable effect by the configuration should also be recognized.

10: Latch holder
100: holder body
101: base side
110: latch entry and exit
111: outer slope
112: inner slope
113: upper wall
114: sidewall surface
120: lever support
121: extension member
122: lever support shaft
123: shield surface
130: pusher support
131: Hall
140: return spring support
141: hook hanger
150: opening detection switch fixing part
151: fixed wall
160: return stop switch fixing part
170: pusher driving part fixing part
180: hook accommodation space
200: latch
210: latch pivot axis
220: latch bar
221: upper slope
230: hook
231: Back slope
232: lower tip slope
233: tip plane
300: lever
310: shaft
320: working part
330: push part
331: interpolation member
332: extrapolation member
333: push up slope
334: top
335: Bottom
336: extrusion
340: force point
342: Spring High Government
350: direction changing unit
400: open detection switch
410: switch body
420: trigger
500: pusher
510: rotating shaft
520: rotating plate
530: push projection
531: curved surface
5311: surface profile
5312: Press hold profile
540: pusher cam
600: pusher drive
610: motor
611: rotary drive shaft
612: housing
620: return stop switch
621: switch body
622: trigger
630: return spring
710: body
720: door
721: frame
722: outer glass
723: inner glass
7231: inner glass holder
724: internal supporter
725: reflective glass
726: hinge bracket
727: door cover
761: display
762: open command input
763: lighting
764: proximity sensor
765: Knock-on sensor
768: door LED
77: control
800: hinge module
810: housing
811: spring hanging plate
812: spring hanging plate support pin
813: damper support pin
814: open / close rotation shaft
815: articulated pin guide slot
820: spring interpolation pin
821: spring support pin
822: inner housing joint pin
823: spring
830: inner link housing
831: door bar connection hinge
832: Damper pressing surface
840: door bar
850: damper
851: piston
852: cylinder
853: slot

Claims (10)

Body 710 having a cavity therein;
A door 720 for opening and closing the open front of the cavity;
An opening command input unit 762 that allows a user to command opening of the door;
An automatic opening module 10 that maintains the closed state of the door 720 or releases the closed state of the door 720; And
A proximity sensor 764 for detecting the distance of a person in front of the door; As a door opening control method of a household appliance comprising:
A proximity sensor 764 sensing the distance of the person in front of the door;
Determining a distance of a person measured by the proximity sensor 764 when the user inputs a door open command through the open command input unit 762; And
Including the step of causing the automatic opening module 10 to open the door when the determined distance of the person is the normal opening distance (c2);
The normal opening distance (c2) is the distance at which the door is opened from the main body (b2) or more at the time of entering the damping intrusion angle (a2) at which the opening speed of the door is damped,
The door opening control method in which the distance (b3) of the position where the door is opened farthest from the main body (710) is within the normal opening distance (c2).
delete The method according to claim 1,
The normal opening distance (c2) is closer than the distance (c21) and the distance (c21), which is a distance section from the distance (b2) of the door where the attenuation is projected to the distance (b3) at which the door is opened the farthest. Including the far base distance (c22),
A door opening control method in which the door opening starts when the determined person's distance is the basic distance (c22), and when the determined person's distance is the proximity distance (c21), the door opening starts after a delay time of several seconds.
Body 710 having a cavity therein;
A door 720 for opening and closing the open front of the cavity;
An opening command input unit 762 that allows a user to command opening of the door;
An automatic opening module 10 that maintains the closed state of the door 720 or releases the closed state of the door 720; And
A proximity sensor 764 for detecting the distance of a person in front of the door; As a door opening control method of a household appliance comprising:
A proximity sensor 764 sensing the distance of the person in front of the door;
Determining a distance of a person measured by the proximity sensor 764 when the user inputs a door open command through the open command input unit 762; And
Including the step of causing the automatic opening module 10 to open the door when the determined distance of the person is the normal opening distance (c2);
The normal opening distance (c2) includes a close distance (c21) closer to the main body and a basic distance (c22) farther from the main body than the close distance (c21),
A door opening control method in which the door opening starts when the determined person's distance is the basic distance (c22), and when the determined person's distance is the proximity distance (c21), the door opening starts after a delay time of several seconds.
The method according to claim 1 or claim 3 or claim 4,
The normal opening distance (c2) includes a close distance (c21) closer to the main body and a basic distance (c22) farther from the main body than the close distance (c21),
When the determined person's distance is the basic distance (c22), the door is opened at the first speed, and when the determined person's distance is the proximity distance (c21), the door is opened at a second speed that is slower than the first speed. Open control method.
The method according to claim 1 or claim 3 or claim 4,
If the determined person's distance is a super close distance (c1) closer to the main body than the normal opening distance (c2), the door opening delays the opening of the door until the person's distance becomes the normal opening distance (c2). Control method.
The method according to claim 1 or claim 3 or claim 4,
When the determined distance of the person is an ultra-close distance (c1) closer to the main body than the normal opening distance (c2), the door opening control method for notifying the user of the warning.
The method according to claim 1 or claim 3 or claim 4,
If the determined distance of the person is a far distance (c3) farther than the normal opening distance (c2), the door opening control method of ignoring the door opening command or not opening the door. The method according to claim 1 or claim 3 or claim 4,
The open command input unit 762 is activated when the distance of the person sensed by the proximity sensor 764 is within the activation distance b1,
The activation distance (b1) is a door opening control method that is a greater distance than the normal opening distance (c2).
A home appliance comprising a control unit 77 to which the door opening control method of claim 1 or claim 3 or claim 4 is applied.

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