KR20190113071A - A Cooking Device Having an Automatically Opening Door and an Auto Opening Latch Holder - Google Patents

Abstract

According to the present invention, in a latch holder (10), a lever (300) to push a latch (200) inserted into a hook receiving space (180) in the latch holder (10) in an opening direction of a door (720) is installed, and the lever (300) is used for the latch (200) to be released from the latch holder (10). When the latch is released, the door opened at an initial opening angle is automatically opened with a pull-down method by a self-load, and a damper is introduced at a predetermined opening angle for the door to be opened downwards at a controlled speed.

Description

A latching device with an automatic opening structure and a cooking device for automatically opening the door by applying the same {{A Cooking Device Having an Automatically Opening Door and an Auto Opening Latch Holder}

The present invention relates to a cooking appliance in which the automatic opening structure is applied to open the door automatically.

Cooking apparatuses such as ovens and microwave ovens generally have a rectangular parallelepiped appearance, and an interior cooking chamber is opened forward and a door is provided in front of the cooking chamber.

The door may be open in various ways, but a hinged door is pivotally rotated around a rotating shaft and is widely used. Most doors of this type are provided with handles or grooves that a user can grip.

Recently, a function of automatically opening and closing the door of the cooker 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 power is used because the door must be opened to overcome the elastic force added to the door in order to add the closing force of the door.

In addition, in the related art, a driving unit that provides an opening force for opening a door is installed near a rotating shaft of a door having a narrow space, which is complicated in structure design and manufacturing, and frequently malfunctions when exposed to a hot environment of a cooking chamber.

Patent Literature 1 discloses a door automatic opening structure in which a latch of a swing door is lifted by a cam to release opening. Two latches of the swing door are provided on one side of the door, and the latches interlock with each other. In other words, the operation of one latch and the operation of the other latch are connected to each other at the same time. And the cam that opens the door lifts one of the latches of the two latches upwards, the latch lifted upwards is pushed forward by the inclined surface provided on the upper part 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 that interlocks with each other. In other words, the invention disclosed in Patent Literature 1 is a way in which the other latch is lifted up in conjunction with this by lifting any one of the latches, so that the latch is over the locking step of the main body in the state of simply lifting the one latch. Simply open the door.

In general, the latch provided on one side of the swing door is easy to configure to interlock with each other. However, in a cooker that uses a pull down door structure, the latches provided at the upper left and upper right sides of the door, respectively, are relatively far from the swing door, so that the latches of the two latches are very far from each other. If both latches are interlocked, it is cumbersome to redesign both the electromagnetic leakage structure of the door and the electromagnetic leakage structure of the main body. Therefore, the door automatic opening structure of patent document 1 is difficult to apply to the door of a pull-down system.

For this reason, the conventional automatic opening structure of the pull-down door has no choice but to install both the left latch and the right latch structure on both sides of the main body. However, a cooking appliance having a pull-down door does not have enough space on both sides of the main body as compared to a cooking appliance having a swing-type door. In addition, unless both latches are simultaneously lifted and the latch is not released, the automatic opening operation of the door is not performed smoothly.

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 generating such a large amount of power is required, or a reduction gear is necessary. And such a drive system is inevitably very heavy. Since the heavy drive system has such a large inertia force, it is often the case that the cam does not stop immediately at that position even if the cam profile presses the switch.

Problems occur when the door is closed if the cam does not stop in place. In other words, even if the latch is closed into the latch holder by closing the door, the force of pressing the cam at the lower end of the hook does not rotate the drive system. Thus, the latch is not completely seated in the latch holder and remains incompletely overlaid. This causes a misdetection of the sensor that detects the closing of the door, and the cooker recognizes that the door is not closed correctly and will not operate.

United States Patent Application Publication No. US2011-0095019A1

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

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

In addition, an object of the present invention is to provide a cooking apparatus that is not affected by the hot environment of the cooking chamber and the reliability of the automatic opening operation is guaranteed.

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

The present invention includes a main body 710 having a cooking chamber therein, a door 720 for opening and closing an open front of the cooking chamber, and an opening / closing rotating shaft 814 serving as a rotation center of opening and closing of the door. The opening / closing rotation shaft 814 is located at the front lower portion of the main body 710 and centers around the horizontal rotation shaft extending in the left and right directions so that the door 720 is pivotally connected to the main body, and thus the door is It is a structure that is opened downward downward toward the center of the rotation shaft, the door may be applied to a pull-down type cooking appliance elastically added by a spring 823 in the direction in which the door is closed.

In the door auto-opening structure of the present invention, a horizontal pivot shaft 210 provided on the door 720 and extending toward the main body 710 is formed on a surface of the door 720 facing the main body 710. A latch 200 pivoting about the center is provided, and the door 720 is engaged with the latch 200 at a portion of the main body 710 corresponding to a position where the latch 200 is provided while the door 720 is closed. ) May be applied to a structure in which the latch holder 10 for maintaining the closed state or unlocking the latch 200 to open the door 720 is provided.

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

To this end, the lever 300 lifts the latch 200 and pushes it in the opening direction of the door. The door 720 has a greater force than the force of the spring 823 at the angle a1 slightly opened by the lever 300 so that the door 720 is opened by its own weight. 720 is opened by its own weight.

According to such a structure, since the lever 300 is not exposed to the outside, even if the 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.

In addition, the door 720 can be opened by the weight of the door 720 without the need to drive the door 720 to the fully opened position in order to open the door 720 automatically, it is very easy to open the door automatically Simple to implement.

When the door is opened downward without any damping by self weight, the door is shocked or the connection part of the door and the main body is impacted, so that the door is fully open at an opening angle a2 larger than the opening angle a1. Up to an angle a3, the damping force may be applied in the opposite direction to the direction in which the door 720 is opened.

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 being sufficiently damped, and the door is not opened too slowly.

The damping force may be released 0 ° to 5 ° before the maximum opening angle a3 of the door, thereby inducing the door to be fully opened without being incompletely opened.

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

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

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

By simply lifting the latch 200 by the lever 300, the latch 200 may not be released from the latch holder. While the latch 200 is lifted by the lever 300, it should be able to be pushed out in the opening direction of the door.

In front of the latch holder 10 is provided a latch entry and exit 110 which is a passage through which the latch 200 enters or exits the hook receiving space 180. When the latch 200 is lifted by the lever, in a situation where the upper surface of the latch 200 touches the ceiling surface of the latch entry hole 110 and no longer moves upward, the lever 300 is latched 200. While the lifting is continued, the lever 300 pushes the latch 200 forward while lifting, the upper surface of the latch 200 slides in the direction in which the door is opened in contact with the ceiling surface and pushes the door. To me.

Here, the upper inclined surface 221 of the latch 200 is provided with an upper inclined surface 221 having a downwardly inclined shape as it moves away from the door, so that the upper inclined surface 221 is latched while the latch 200 is lifted by the lever. By contacting the upper wall surface 113, which is the ceiling surface of the entrance and exit 110 and sliding in the opening direction, the force to push the latch 200 to the lever 300 can be transmitted to the door smoothly.

After the latch 200 is released by the lever 300 and is pushed in the opening direction, the latch 200 is elastically provided with a latch entry and exit hole 110 provided in front of the latch holder 10. It is seated on the outer inclined surface 111 provided at the bottom of. Since the outer inclined surface 111 has a form inclined downward toward the door from the main body, the latch 200 does not interfere with the opening of the door in the process of opening the door.

The latch holder for implementing the above-described door opening mechanism, the holder body 100 forming the overall frame of the latch holder; A latch entrance and exit hole 110 provided in front of the holder body 100 and serving as a passage through which the latch 200 enters and exits; An outer inclined surface 111 provided below the latch entrance and exit hole 110 and inclined downward toward the front; And an upper wall surface 113 provided at an upper portion of the latch entrance and exit hole 110. A lever support part 120 spaced apart from the rear of the latch entrance and exit hole 110; A hook receiving space 180 provided between the latch entrance and exit hole 110 and the lever support part 120; A lever 300 rotatably supported by the lever support part 120 and provided with a push part 330 provided at a front end thereof at a lower portion of the hook accommodation space 180; A pusher 500 for rotating the lever support 120 to lift the lever 300; And a pusher driver 600 for driving the pusher 500.

The push unit 330 includes an interpolation member 331 provided at the tip of the lever 300, and an extrapolation member 332 extrapolated to the interpolation member 331, wherein the extrapolation member 332 is the Sliding with the latch 200 to push the latch 200 in the opening direction of the door (720). Thus, the extrapolation member 332 and the other lever 300 can be made of different materials, so that it is possible to selectively configure a material suitable for the performance that each configuration should exhibit.

The extrapolation member 332 preferably includes a material having a lubricity surface that is higher in abrasion resistance and has a lower coefficient of friction than the interpolation member 331.

The front surface of the lever support portion 120 is provided with a shielding surface portion 123 for shielding the inside of the latch holder from the outside through the latch inlet and outlet 110 from the outside, so that the inside of the latch holder from the outside to look neat appearance To provide.

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

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

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

The push unit 330 may include: 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 a bottom surface of the top surface 334 ( It is provided on the push-up inclined surface 333 and the lower end of the push-up inclined surface 333 so that the front end of the 335 is inclined, and further includes a push-up portion 336 protruding forward from the push portion 330. .

As the lever 300 is rotated and the push part 330 is lifted up, the latch 200 accommodated in the hook accommodation space 180 is connected to the upper surface 334 and the lifting slope 333. Starting near the boundary, it slides up to the lower end of the pushing slope 333 and is lifted up by the force from the lever 300.

The push part 330 is disposed below the center of rotation of the lever 300, and as the lever 300 rotates, the pusher 336 has a height equal to or greater than the center of rotation of the lever 300. Is raised to a height. Accordingly, the push unit 330 pushes the lever 300 upward and outward.

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

An open detection switch 400 is installed below the hook receiving space 180 to detect a closed state of the door, and the trigger 420 of the open detection switch 400 is disposed below the push part 330. However, in the state that the latch is not inserted into the hook receiving space 180, the push unit 330 lowered by the return spring 630 does not press the trigger 420, so that the push unit 330 alone By pressing the open detection switch 400 to prevent the cooker from malfunctioning.

The force point portion 340 is pressed by the pusher 500 in a direction opposite to the biasing direction of the return spring. Therefore, when the pusher 500 presses the force point 340, the force overcomes the restoring force of the return spring and moves the force point 340. Accordingly, the lever 300 rotates and the push unit 330 latches. (200) will be lifted. When the pusher 500 returns, the lever 300 returns to its original position by the return spring.

The pusher 500 includes: a rotating plate 520 rotated by a motor 610; It is provided in a position eccentric from the rotation center of the rotary plate 520 by rotating as the rotary plate 520, by pressing or pushing the force point 340, the pusher cam 540; includes. Accordingly, the pusher cam 540 presses or releases the lever according to the displacement of the rotating plate 520.

The rotary plate, provided in the position eccentric from the rotation center of the rotary plate 520, even if the rotary plate 520 is rotated as the rotary projection 530 is provided in a position that does not meet the lever 300 is further And a trigger 622 that is pressed when the pusher 520 rotates and the pusher 530 is positioned at a predetermined position, and is not pressed at a position outside the predetermined position near the pusher 500. The return stop switch 620 is provided to control the rotation and the stop point of the rotating plate 520.

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

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

In addition, the present invention is to amplify the door opening force by using the lever, it is sufficient to initially open the door only to the position that the door opens by itself due to its own weight, it is possible to implement a structure that automatically opens the door with a low-power drive unit. .

Also, since the drive system itself is light, when the latch is accommodated in the latch holder by closing the door, the lever and the pusher are rearranged to the right position by the force of the latch pushing the lever even if the lever and the pusher are slightly displaced from the home position. As a result, the door closing operation may also be performed smoothly.

In addition, the automatic opening structure of the present invention is installed in a position that is not affected by the hot environment of the cooking chamber, as well as its components are not exposed to the outside, there is no fear of malfunction and can provide a clean appearance.

1 is a perspective view of a latch holder to which the automatic opening structure of the cooking appliance according to the present invention is applied.
FIG. 2 is an exploded perspective view of the latch holder of FIG. 1. FIG.
3 is a perspective view of a holder body of the latch holder of FIG. 2.
4 is an enlarged view of an axial part, an acting part, and a push part of the lever of the latch holder of FIG. 2.
FIG. 5 is a side view of FIG. 1 and illustrates a latch holder in a latch (not shown) state.
6 is a view illustrating a state in which the pusher of FIG. 5 pushes the lever so that the bushing portion of the lever is lifted.
7 is a view illustrating a state in which the pusher and the lever are returned to their initial positions in a state where the latch is removed.
8 is a side view illustrating a state in which a latch is inserted and fixed to the latch holder by closing the front of the cavity of the cooker with a door in the cooker provided with the latch holder.
FIG. 9 is a view illustrating a process in which the pusher pushes the lever in FIG. 8 to lift the latch of the pushing slope of the push part of the lever.
FIG. 10 is a view illustrating a process of lifting the latch in FIG. 9 to further push the latch out of the lever.
FIG. 11 is a view showing a state in which the latch is pushed down and then lowered and seated on an external inclined surface.
FIG. 12 is a view illustrating a process in which a door is opened by its own weight after the latch is released as illustrated in FIG. 11.
FIG. 13 is a perspective view illustrating a door hinge structure that may be used to automatically open and lower the door by the weight of the door as shown in FIG. 12.
FIG. 14 is a side view illustrating the door hinge structure of FIG. 13. FIG.
15 is a view showing the geometry of the lever of the present invention.

Hereinafter, exemplary 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 can be implemented in various different forms, only the present embodiments are intended to complete the disclosure of the present invention and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you.

[Overall Structure of Cooking Equipment]

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

Referring to FIG. 14, a cooking appliance is illustrated as an example of the present invention. However, it will be apparent that the cooking appliance of the present invention is not limited to a microwave oven.

The cooking apparatus includes a main body 710 having an approximately rectangular parallelepiped shape and having an open front and an empty inside, 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 provided in the outer housing and provided with a cavity opened forward. The cavity constitutes a cooking chamber. Various parts necessary for the operation of the cooking appliance are provided at the upper side, the rear side, and the 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. 13 and 14) at a lower end of the door. That is, the door 720 is rotated to the front lower portion with respect to the main body to open, and rotates to the rear upper portion is closed.

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

The upper side of the main body 710 is provided with a latch holder 10 to maintain the door 720 is closed, the door is automatically opened. In addition, the door 720 is provided with a latch 200 that is caught by the latch holder 10 to maintain the door closed or is released from the latch holder 10 to open the door.

The latch is installed to protrude rearward from the upper ends of the doors. The latch holder 10 of the main body 710 is disposed above both front ends of the main body corresponding to the position where the latch is installed. The latch holder 10 is open to the front has a latch entry and exit hole 110 through which the latch can enter.

According to the present invention, a latch holder 10 for automatically releasing a latch of the latch may be provided in correspondence with any one of two latches, and the other conventional latch having no automatic release function on the other side. Holders may be provided. The two latches are mounted on the doors to behave independently of each other. The two latches may be elastically supported in the door so that the hook portion of the leading end is downward, and the elastic force acting on the two latches may be the same.

13 and 14, a hinge module 800 provided with a spring 823 and a damper 850 is connected to the front lower portion of the main body and the lower portion of the door. The spring 823 urges the door in a direction in which the door 720 rotates upward rearward, that is, in a direction of closing the door. Accordingly, the spring 823 prevents the door from being opened hard when the door is opened and lowered.

In addition, damper 850 attenuates 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 a damping force only when the door is opened, or may provide a damping force in both the opening and closing directions of the door. In addition, the damping force may be provided in all rotation angle sections in which the door is opened and closed, or the damping force may be provided in some sections of the rotation angle range.

The damper 850 may attenuate 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. 12 is illustrated.

As will be described later, the damping intrusion angle a2 at which the attenuation starts when the door is opened may be 35 ± 5 ° (see FIG. 12).

[Latch holder]

Hereinafter, a latch holder which is an automatic door opening device of a cooking appliance according to the present invention will be described with reference to FIGS. 1 to 7.

The latch holder of the present invention is a holder body 100 for supporting the overall structure, the latch entrance and exit hole 110 provided in front of the holder body 100, the lever 300 installed in the holder body 100, the open detection switch 400, a pusher 500, and a pusher driver 600.

The latch 200 of the door 720 is pulled in and out from the front of the latch holder through the latch entry and exit hole 110. Inside the latch entrance and exit hole 110 is provided with a hook receiving space 180 for receiving the hook of the latch. An opening detecting switch 400 is installed below the hook accommodation space to detect whether the hook is accommodated in the aircraft hook accommodation space 180 to maintain a locked state.

The rear of the hook receiving space 180 is provided with a lever support portion 120 in which the lever 300 is rotatably installed. The lever 300 includes an acting portion 320 extending forward from the lever supporting portion 120 and a push portion 330 extending from the tip of the acting portion 320 to the hook receiving space 180. And a force point portion 340 extending upward from the support portion 120 and extending upward.

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

A pusher 500 for pushing the force point 340 of the lever 300 to the rear and a pusher driver 600 for providing a driving force of the pusher 500 are installed above the lever support 120. The motor 610 of the pusher driver 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 the return stop switch 620. This control is performed by an operation of pressing the trigger 622 of the return stop switch 620 by the push protrusion 530 installed in the pusher 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]

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

The front and lower portions of the holder body 100 are provided with latch entrance and exit holes 110 that are opened forward. The latch entry and exit hole 110 is a path from which the latch 200 enters into the holder body 100 or the latch exits from the holder body 100 forward.

The latch entrance and exit hole 110, the outer inclined surface 111 defines the boundary at the lower side, the upper wall surface 113 defines the boundary at the upper side, the side wall surface 114 on both sides thereof Define boundaries.

Under the latch entrance hole 110, the outer inclined surface 111 of the form inclined upward from the front to the rear is provided. When the latch 200 enters the holder body 100, the tip lower slope surface 232 of the hook portion 230 of the latch 200 rises on the outer slope surface 111.

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

The inner inclined surface 112 is in contact with the rear inclined surface 231 of the hook portion 230 of the latch 200 entered into the holder body 100 and prevents the latch 200 from being separated from the front. On the other hand, the internal inclined surface 112 provides an inclined surface that allows the rear inclined surface 231 of the latch 200 to naturally slide up when the user pulls the door forward to open the door. . 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 open the door manually.

The upper wall surface 113 includes a horizontal ceiling surface provided on the upper portion of the latch entrance and 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 sloped surface 221 of the latch 200. The upper inclined surface 221 is guided to slide forward.

The upper wall surface 113 and the outer slope surface 111 are connected to the first side and the second side by the side wall surface 114 vertically. The spacing between the two sidewalls 114 is wider than the width of the latch 200 and thus does not interfere with the latch 200.

The rear of the latch entry and exit 110 is provided with a shielding surface portion 123 that shields the inside from being seen through the latch entry and exit 110 when viewed from the front to the rear. The shielding surface portion 123 includes a flat plate shape having a normal line in the front-rear direction. The hook portion 230 of the latch 200 is accommodated in the hook accommodating space 180 provided by the shielding surface portion 123 spaced backward from the latch entry and exit hole 110.

The shielding surface portion is perpendicular to the base surface 101 and connected to the base surface 101 to thereby reinforce the overall rigidity of the holder body 100. Behind the shielding surface portion, a lever support portion 120 for rotatably supporting the lever 300 is provided. The lever 300 is a component that operates to release the latch state of the latch 200 is fixed to the holder body (100).

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

Since the shielding surface portion 123 blocks the latch entry and exit hole 110, the lever 300 installed in the lever support portion 120 is disposed at a position to avoid the shielding surface portion 123 and the lever support portion 120. . The lever support part 120 extends from the base surface 101 and is provided on the extension member 121 connected to the shielding surface part 123 and the extension member 121 to rotate the lever 300. It has a lever support shaft portion 122 for supporting it. The lever 300 is pivotally coupled to the lever support shaft portion 122 and is rotated to be in contact with the second side surface of the extension member 121.

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

The shielding surface portion 123 may be disposed in a form slightly offset to the first side with respect to the lever access hole 110. This is to minimize the eccentricity to the side between the push portion 330 and the force point 340 of the lever 300 acting force.

The lower part of the latch entrance and exit hole 110 and the lever support part 120 is provided with an open detection switch fixing part 150 to which an open detection switch 400 for detecting a closed state of the door is fixed. The open detection switch fixing part 150 includes a flat part having a normal to the side, and connects the lower part of the latch entrance and exit hole 110 and the lower part of the lever support part 120 to each other.

 The open 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 is the lever support part ( 120).

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

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

The holder body 100 is provided with a pusher 500 for pushing the lever 300 to rotate the lever 300 in the direction of opening the latch 200. To this end, the base surface 101, a pusher support 130 for supporting the pusher 500 is provided. The pusher support unit 130 includes a hole 131 into which the rotation shaft 510 of the pusher 500 is inserted, and supports the first side surface of the pusher 500 that supports the rotating plate 520 of the pusher 500. Include. The first side surface contacts the push protrusion 530 provided on the second side surface of the rotating plate 520 to support the rotating plate 520.

On the base surface 101 on the opposite side (second side surface) of the surface on which the pusher 500 is installed (first side surface), a pusher driving portion fixing the pusher driving unit 600 for driving the pusher 500. Government 170. The pusher driver 600 may be a rotary motor 610, and the housing of the motor 610 may be fixed to the 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 is provided to fix the return stop switch 620. The return stop switch 620 includes a trigger 622 which is pressed by the pusher 530 of the pusher 500. The trigger 622 is pushed by the pusher 530 at the position where the pusher 500 should return after pushing the lever 300, thereby stopping the rotational driving of the motor 610. Therefore, the return stop switch 620 is installed at the position where the trigger 622 is pressed by the pusher 530 at the return position of the pusher 500. The return stop switch fixing unit 160 may be provided on the pusher support unit 130.

In addition, in order to provide a force to return to the original position after the lever 300 pushes the latch 200, the holder body 100 is provided with a return spring support 140. The return spring supporter 140 is disposed closer to the lever supporter 120 than the pusher supporter 130. The return spring supporter 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 portion 120 so that the shaft portion 310 is fastened to the lever support shaft portion 122 of the holder body 100. The lever support shaft portion 122 may include a shaft shape extending in the second side, and the shaft portion 310 may have a hole shape for receiving the shaft shape. On the contrary, the lever support shaft portion 122 may have a hole shape, and the shaft portion 310 may have a shaft shape.

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

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

The push unit 330 is made of the same material as the overall material of the lever 300, or the interpolation member 331 and integrally produced with the lever 300, and the extrapolation member extrapolated to the interpolation member 331 ( 332). The interpolation member 331 secures the rigidity of the push unit 330, and the extrapolation member 332 may be made of a material having a low friction coefficient and high wear resistance to make sliding contact with the latch 200. In particular, the push unit 330 is in sliding contact with the latch 200, the push unit 336 is operated so as to reliably push the front end surface (232, 233) of the latch 200, the extrapolation member (332) is made of a material with high surface hardness, high wear resistance, low coefficient of friction, and lubrication, thereby further increasing the reliability of operation.

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

On the other hand, when the interpolation member 331 is in direct contact with the latch, there is a fear that permanent damage may occur on either surface due to contact between the metal materials, which may cause a large frictional force to expand the damaged part. In addition, since the elastic restoring force such as the degree of the resin material can not be expected, there is a fear that the opening operation of the latch is not performed smoothly.

The push unit 330 may have a cross-section of a substantially trapezoidal shape when viewed from the side. The bottom surface 335 of the push unit 330 is a pressing surface for pressing the trigger 420 of the open detection switch 400 provided below the push unit 330. The upper surface 334 of the push portion 330 is 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 part 330 downward on the upper surface of the push part 330, and the push part 330 presses the trigger 420 by the force of the latch.

Since the upward force that the trigger 420 has on the switch body 410 is greater than the load of the push unit 330, in the state where only the push unit 330 is placed on the trigger 420 without the latch 200. The push unit 330 does not push down the trigger 420 but is slightly raised on the trigger 420.

Push portion 330 is provided with a push-up inclined surface 333 on the front surface. The push-up inclined surface 333 has a lower end portion projecting more forward than the upper end portion, and is inclined backward from the lower end portion toward the upper end portion. The pushing inclined surface 333 has a slightly convex curved profile and is in surface sliding contact with the tip 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 lifting slope 333 constitutes a pushing part 336 that pushes the front end of the latch 200 to the end.

The lever 300 further includes a force point portion 340 extending rearward with respect to the shaft portion 310. The distance between the force point of the shaft portion 310 and the force point 340, rather than the distance between the shaft portion 310 and the push portion 330, to amplify the force by which the push portion 330 lifts and pushes the latch. Is set farther away. According to this structure, the pusher driver 600 may be configured to have a lower power and a lighter weight.

In order to manufacture the latch holder more compactly, the force point portion 340 may be manufactured in an approximately "L" shape, and the force point may be provided near the upper end of the force point portion 340. The force point 340 is subjected to a force by the pusher 500, the force is transmitted to the push unit 330.

When the pusher 500 returns to the force point part 340 after applying force to the force point part 340, one end of the return spring 630 for returning the lever 300 to its original position is connected. Government 342. The spring fixing part 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 necessary when the lever 300 returns to the initial position after pushing the latch. Accordingly, the spring fixing part 342 may be disposed closer to the shaft 310 than to 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.

Preferably, the return spring 630 provides only the force of the lever 300 to the original position. That is, the return spring 630 does not continuously add the lever 300 returned to the original position, so that the push part 330 of the lever 300 alone triggers 420 of the open detection switch 400. You can avoid pressing).

The lever 300 includes a first surface facing a first side and a second surface facing a second side, the first surface of which is the second of the lever support part 120 facing the second side. It is supported in contact with the surface.

[Pusher]

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

The rotating plate 520 has a flat disk shape as a whole, and the force point portion 340 of the lever 300 is disposed to face the first side surface of the rotating plate 520.

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

The pressing protrusion 530 is connected to the base end (end portion close to the rotating plate) of the rotating shaft 510 and is provided on the second side surface of the rotating plate 520. The pressing protrusion 530 is provided at any part in the circumferential direction of the rotating plate 520, and the radially outer end of the pressing protrusion 530 is provided at a position capable of pressing the trigger 622 of the return stop switch 620. do. Since the push protrusion 530 presses the trigger 622 while turning about the rotation shaft 510, a convex curved portion 531 is provided at the distal end. The curved portion 531 of the push protrusion 530 has a convex shape when viewed at least from the side, so that the trigger 622 is pressed in contact with the convex shape of the curved portion 531.

The curved portion 531 includes curved profiles 5311 provided on both sides, and a pressing holding profile 5312 connecting the curved profiles 5311. The pressing holding profile 5312 maintains a state in which the trigger 622 is pressed even when the rotating plate 520 is rotated by 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 rotary plate 520 is slightly rotated by the inertia of the motor 610 and the rotating plate 520 to push the protrusion 530. If is out of the trigger 622, there is a fear that the pressed state of the trigger 622 is released. The holding profile 5312 allows the pusher to hold the trigger even when the rotating plate rotates a little more due to the inertia of the motor and the rotating plate.

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

On the other hand, the cam structure of Patent Document 1 described above is heavy because the cam is directly connected to the driving unit, and the cam is connected with the 1/5 rotation of the lever and the upward movement of the lever. If the cam does not stop in place, there is a high probability that the door will close and the cam will not return to home even if the latch presses on the cam.

The pusher cam 540 has a cylindrical shape that protrudes 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 surface of the rotating plate 520 to the rear. .

[Pusher drive part]

The pusher driving unit 600 is fixed to the second side of the holder body 100, the motor 610 to be coupled to the rotary shaft 510 of the pusher 500 penetrating the holder body 100, the holder body It is fixed to the first side of the (100) and has a return stop switch 620 for controlling the stop of the motor 610.

The housing 612 of the motor 610 is fixed to the holder body 100, and the rotation driving shaft 611 is fixed coaxially with 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 driving shaft 611 rotates. Then, the motor 610 is rotated until the pusher 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 by the push protrusion 530, the power supplied to the motor 610 is cut off. Accordingly, the rotary drive shaft 611 and the pusher 500 begin to rotate at the position where the push protrusion 530 presses the trigger 622, and rotates until the push protrusion 530 presses the trigger 622 again. Done. Therefore, when one push protrusion 530 is provided in the circumferential direction as in the embodiment, the pusher 500 always rotates once and stops. If the push protrusion 530 is provided with two equal intervals in the circumferential direction, 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 from the outside of the pusher 500, and the trigger 622 may interfere with the pusher 530. Installed in the same location.

Controlling the rotation stop point of the pusher 500 with the return stop switch 620 has several advantages. First, rotation of a certain angle (one rotation in the embodiment) is physically implemented in a very simple structure. In addition, even if the pusher 500 is stopped while the power is turned off due to a power failure or the like, the pusher 500 may be moved to an initial position only by controlling to apply power to the motor 610 so that the pusher 500 rotates when the power is turned on again. Will stop exactly aligned.

[Open detection switch]

The open detection switch 400 is a switch body 410 is fixed to the fixed wall 151 of the open detection switch fixing part 150 provided in the lower portion of the hook receiving space 180, and in the switch body 410 An upwardly protruding trigger 420. 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 is projected upward.

As described above, the trigger 420, the latch 200 is accommodated in the hook receiving space 180 and the latch 200 is fixed to the hook portion 230 is fixed to the inner inclined surface 112 By the pushing force of the push part 330 of the lever, it is pressed by the push part 330. On the other hand, the latch 200 does not press the push part 330 for the reason that the latch 200 is withdrawn from the latch inlet / out hole 110, and the push part 330 is lifted up on the trigger 420 by itself. 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 that the latch 200 presses and is stronger than the force that the push unit 330 presses alone.

The latch 200 may be provided at both sides of the door, and a latch holder having an outer slope 111 and an inner slope 112 corresponding to a latching structure of the latch may also be opened and closed by a door in the main body of the cooker. It may be disposed on both sides of the opening of the cavity to be. 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 pressed at the same time, it may be determined that the door of the cooking appliance is open and the cooking appliance does not operate.

Of course, among the latch holders on both sides, the above-described latch automatic 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 in the latch holder on one side is indirectly pressed by the lever 300 when the latch 200 is received, and the open detection switch installed in the latch holder on the other side is latched when the latch is received. Can be pressed directly.

[Latch Holder Operation]

Referring to FIG. 5, in a state where 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 thus the push part 330 is The trigger 420 of the open detection switch 400 is pressed. In such a state, the lever 300 is rotated most clockwise about the lever support shaft 122.

When the user inputs a command for detaching the hook from the hook accommodation space 180, that is, a door opening command, the pusher 500 rotates as shown in FIG. 6. Although the direction of rotation is irrelevant, it is illustrated in the present invention that the pusher 500 rotates counterclockwise. As the pusher 500 rotates, the lever 300 is pushed by the pusher cam 540 to rotate counterclockwise about the lever support shaft 122. Accordingly, the push part 330 is lifted to the front, and the hook placed on the push part 330 will also be lifted.

When the pusher 500 is further rotated to push the force point 340 of the lever to the rear most, and then rotates to the position shown in FIG. 7 again and stops, the lever 300 is returned to the lever by the return spring 630. It rotates clockwise around the support shaft 122 and returns to its original position.

[Door unlock behavior]

Hereinafter, a process of automatically opening the door by installing the latch holder 10 having the above-described operating principle in the cooking apparatus will be described with reference to FIGS. 8 to 11.

The latch 200 used together with the latch holder 10 of the present invention, as shown in Figure 8, is installed to be rotated up and down about a horizontal pivot axis 210, the latch bar is elastically downward ( And a hook portion 230 extending downwardly from the front end of the latch bar 220.

The upper inclined surface 221 of a gentle inclined surface that is downward toward the front end is provided at the upper end of the latch 200. The upper inclined surface 221 is an upper wall surface of the latch entry hole 110 when the latch 200 is lifted by the lever 300 and receives a force forward, for example, when an unexpected obstacle occurs in the opening operation of the door. It is a surface that slides in contact with 113).

The tip of the hook portion 230 is provided with a flat tip plane 233, the lower end of the tip plane 233 is provided with a curved lower tip inclined surface 232. In addition, the rear surface side of the hook portion 230 is provided with a rear surface inclined surface 231 to be in contact with the internal inclined surface 112 of the latch entrance and exit hole 110 described above.

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

Although the lever 300 of the latch holder 10 provided on one side of the door pushes the latch 200 upward, the latch provided on the other side of the door does not rotate in conjunction with the latch of the one side. However, since the force to open the door is transmitted to the other side by the lever 300 provided on one side of the door by pushing the latch on one side, the back sloped surface of the hook portion 230 of the latch 200 provided on the other side of the door. 231 rides up the inclined surface 112 and is separated from the latch holder on the other side.

The back sloped surface 231 may also be used when the door is to be opened manually. For example, when the user pulls the door forward, the rear inclined surface 231 of the hook portion 230 of the latch provided on both sides of the door ascends the inner inclined surface 112 of the latch entrance and exit hole 110 and the latch 200. Is separated from the latch entrance and exit hole 110. The present invention provides a device that automatically releases the latch 200 from the latch entry and exit 110 by placing the lever 300, the pusher 500 and the pusher driver 600 in the latch holder 10 of the main body. However, there are many situations in which a door must be opened manually when a power failure, cooker failure, or AS occurs. Accordingly, in the present invention, the rear sloped surface 231 is formed on the hook portions 230 of both latches 200 so that the door can be manually opened, and the inner sloped surface 112 and the outer sloped surface 111 are formed on both latch holders. Prepared.

Referring to FIG. 8, the hook portion 230 of the latch 200 enters the hook receiving space 180 so that the rear sloped surface 231 is hung on the inner sloped surface 112, that is, the door is closed. It is. In the state where 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 openly sensed by a force pressed downward by the hook portion. The trigger 420 of the switch 400 is pressed.

The latch holders 10 are installed at 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 pressed state. You can see that is closed. Therefore, when the user manipulates the control panel installed in the front of the door, cooking can be started.

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

To this end, the controller rotates the motor 610. As the motor 610 rotates, as shown in FIG. 9, the pusher 500 rotates and the pusher cam 540 pushes the force point 340 of the lever 300 backward. Accordingly, the lever 300 rotates counterclockwise around the shaft 310, and the push part 330 provided in front of the lever 300 moves upward and forward. 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 rotates, the push portion 330 rotates to the front upper portion.

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 unit 330 revolves and rotates based on the shaft 310, the push unit 330 also rotates slightly. Accordingly, the push-up inclined surface 333 of the push unit 330 is in contact with the tip lower inclined surface 232 of the latch 200 to lift the latch 200 to the upper front. The extrapolation member 332 of the push portion 330 is preferably made of a smooth lubricity by using a material of high lubricity and wear resistance. Since the above operation is very sensitive to the trajectory of the lever and the latch, if the material of the push unit 330 is a material of high friction or low wear resistance, the latch 200 may damage the push unit 330. Rather, it could be confirmed that the push unit 330 may not lift the latch 200.

As the push unit 330 moves up and pushes the latch 200 forward, the trigger 420 of the open detection switch 400 is released.

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

If the push portion 330 is raised, the pusher 336, which is the bottom edge of the push-up slope 333, pushes the lever 300 farthest, as shown in FIG. 200 is rotated again by elasticity.

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

On the other hand, in some cases, for example, there is an obstacle in the track of the door opening, when a larger opening force is required in the direction in which the door is opened, even if the push unit 330 is raised, the latch 200 does not move smoothly forward. An action that only rises from the state may occur.

Even in this case, as shown in FIG. 10, the upper inclined surface 221 of the latch 200 is in contact with the upper wall surface 113 of the latch entrance and exit hole. When the push portion 330 is further raised while the latch 200 is in contact with the upper wall surface 113, as shown in FIG. 10, the pushing portion 336, which is the bottom edge of the raised slope 333, is finally shown. Will push the lever 300 farthest. At this time, the latch 200, the upper inclined surface 221 is sliding to the upper wall surface 113 of the latch entrance and exit hole is pushed outward.

In this case, the upper inclined surface 221 may be in contact with the upper wall surface 113 as a whole, such that the upper inclined surface 221 slides smoothly with respect to the upper wall surface 113. To this end, when the latch 200 is lifted up, the upper inclined surface 221 contacting the upper wall surface 113 may be approximately horizontal.

If the upper inclined surface 221 does not entirely contact the upper wall surface and is slightly inclined toward either side, it may be more difficult to withdraw the natural surface than when the upper inclined surface 221 is horizontal.

As described above, when the opening force required for the door is small, the latch 200 behaves in the order of FIGS. 8, 9, and 11 and can be unlocked, and the opening force required for the door is large. Edo 8, 9, 10 and 11 in the order of behavior can be unlocked. 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 applied to the door for the automatic opening of the spring 823 of the hinge module 800 in the closing direction for each product, the latch holder of the present invention ( 10) can secure the unlocking of the latch.

In addition, as shown in FIG. 11, in any case, the force of the latch 200 reaching the position where the lock is released by the lever 300 to rotate downward is shifted in the horizontal direction on the inclined surface 111. Since the door is further opened forward, the opening operation of the door can be performed smoothly.

Referring to FIG. 15, when the lever 300 rotates about the shaft portion 310, first, the upper end of the lifting slope 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 in contact with the latch 200 gradually moves to the lower portion of the pushing inclined surface 333. In addition, when the lever 300 is further rotated counterclockwise so that the pushing portion 336 is raised to the same height as the shaft portion 310, the lever 300 pushes the latch outward the most. That is, the lifting slope 333 is pushed up by lifting the latch 200 in the direction of the arrow shown in FIG.

When the pushing portion 336 rises to the same height as the height of the shaft 310 or further goes beyond the latch 200, the latch 200 is separated from the trajectory of the push portion 330. Accordingly, the latch 200 is dropped downward by the elasticity is downwardly applied as shown in FIG. In other words, the latch that is in contact with the upper wall surface 113 is lowered again. At this time, since the latch 200 is pushed further beyond the horizontal direction of the arrow shown in FIG. 15, the latch 200 is placed on the outer inclined surface 111. That is, the hook of the latch 200 is no longer caught on the inner inclined surface 112, and as the door is opened, the lower portion of the hook portion 230 may descend on the outer inclined surface 111.

Since the pusher 330 is disposed below the front of the shaft 310, the pusher 330 is raised to the same height as the shaft 310 so that the upper end portion of the pushing slope 333 is m higher than the original position. Will move forward. According to the present invention, the lower end inclined surface 232 of the latch 200 slides from the upper end to the lower end of the lifting slope 333, so that the latch 200 is pushed forward by n more.

FIG. 12 illustrates an opening angle a1 in which the latch 200 is pushed outward to open the door as shown in FIG. 11. 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 opening by itself, the door may open and accelerate to fall. In the present invention, when the door 720 is opened, the damper starts to act at a predetermined angle (a2) to open slowly at a controlled speed until the final opening angle (a3), thereby impinging on the hinge module 800 of the door. This prevents the door from breaking and the user feels comfortable while watching the door open automatically.

[Door auto opening operation]

When the user touches a display or the like installed on the front of the door and inputs a door opening command, the latch holder 10 operates in the order of FIGS. 5 to 7, and accordingly, the latch holder 10 operates in the order of FIGS. 8 to 11. 200 is released from the latch holder 10 so that the door is pushed by a predetermined angle a1.

The predetermined angle a1 may be set to such an extent that the door may open by itself. The angle a1 may be, for example, about 2 to 7 °, and preferably about 3 to 5 °.

Referring to FIGS. 13 and 14, the hinge module 800 connecting the main body 710 and the door 720 may include a portion of the door bar 840 fixed to the door 720 and a main body 710. A portion of the housing 810 rotates based on the opening / closing rotation shaft 814.

As the door bar 840 rotates with respect to the housing 810, a damping force is transmitted to the door bar 840.

An inner link housing 830 is provided inside the housing 810 to move along the longitudinal direction of the housing. The front end of the inner link housing 830 is hinged at the door bar 840 and the door bar connection hinge 831. Since the door bar connection hinge 831 is slightly eccentric in the opening and closing rotation shaft 814, when the door 720 (door bar 840) is opened, the door bar connection hinge 831 is moved forward with respect to the opening and closing rotation shaft 814. Accordingly, the inner link housing 830 also moves forward in the housing 810.

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. Both ends of the inner housing joint pin 822 are fitted to the joint pin guide slot 815 provided in the housing 810. The joint pin guide slot 815 has a shape of a long hole extending along the longitudinal direction of the housing 810.

The spring interpolation pin 820 is extrapolated in a state where the compression coil spring 823, which is very elastic, is already compressed. The spring interpolation pin 820 may slide through the spring stopping plate 811 fixed to the housing 810 along the longitudinal direction of the housing 810, but the front end portion of the compression coil spring 823 may be moved. The spring catching plate 811 of the housing 810 is caught. To support the force of the compression coil spring 823, a support pin 812 may be further installed in the housing 810 to further support the spring catching plate 811.

A spring support pin 821 is provided at a rear end of the spring interpolation pin 820 to fix the rear end of the spring 823. The spring support pins 821 do 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 stopping plate 811 and the spring support pin 821, and the elastic force is gradually increased. That is, when the opening angle of the door is small, the elastic force of the spring 823 is small, but as the opening angle of the door is large, the elastic force of the spring 823 also increases. The elastic force acts in a direction that prevents the door from opening.

The biasing force that the spring 823 pushes in the direction of closing the door becomes larger as the opening angle a1 to a3 of the door increases. The force applied by the spring 823 at the opening angle a1 of the door is smaller than the force that the door opens by itself due to the weight of the door at the opening angle a1, so that the door pushed by the lever 300 to the opening angle a1 It is set to open on its own.

A damper 850 is installed inside the inner link housing 830. The piston 851 of the damper 850 is supported by the damper pressing surface 832 integrally fixed to the inner link housing 830. A cylinder 852 is extrapolated to the piston 851. A slot 853 in which the damper support pin 813 fixed to the housing 810 is inserted is provided at the upper portion of the cylinder 852. That is, the cylinder 852 may move back and forth by the length of the slot 853. 14 shows the position between the slot 853 of the damper 850 and the damper support pin 813 of the housing 810 with the door closed.

The inner link housing 830 moves forward and the damper 850 also moves forward until the door is opened and moved at a predetermined angle a2. At this time, the damper 850 moves forward with the inner link housing 830, but does not generate any damping force.

As soon as 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, so that the damper 850 begins to be compressed. The damping force generated by the damper 850 being compressed causes the door to be attenuated and opened at the opening angle a2 to a3.

While the door is opened to a2, the door bar connection hinge 831 also rotates by a2, so that the inner link housing 830 and the spring interpolation pin 820 move forward by d2. While traveling 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.

While the door is opened to a3, the door bar connection hinge 831 also rotates by a3, so that the inner link housing 830 and the spring interpolation pin 820 move forward by d3. That is, the spring 823 is compressed by d3. The maximum opening angle a3 may be regulated by the joint pin guide slot 815 of the housing 810 which regulates the slide movement distance of the inner housing joint pin 822.

The angular range in which the damper 850 attenuates the opening force of the door may begin, for example, when the door is about 30 ° to 40 ° and continue until approximately 90 °. Then, the door is opened by the latch holder 10 to the initial opening angle a1, and then slowly accelerated and opened by its own weight, and slowly opened by the damper's damping force when a2 (about 30 ° to 40 °) is released. Can be. This opening of the door allows the user to feel secure.

If the attenuation begins too early with the door open, the waiting time for the door to open is too long, causing discomfort. On the other hand, if the attenuation of the door begins too late, the door opens too quickly to the extent that the door is opened to a considerable extent, which may cause a user to be surprised or uncomfortable, and may be injured by hitting the fast opening door.

In this regard, the damping intrusion angle a2 at which the damper 850 begins to dampen the opening force of the door is preferably 35 ± 5 °.

The damping force may last up to 90 ° when the door is fully open, or up to 85 ° about 5 ° less. If the damping force is fully applied until the door is fully opened, it may be considered that the damping force does not act after 85 ° in order to avoid the possibility that the door will not open completely and open about 1-2 degrees less.

As such, the attenuation intrusion angle a2 is set larger than the forced opening angle a1. The section between the forced opening angle a1 and the damping rush angle a2, that is, 3 ° to 5 ° or more and 30 to 40 ° or less, is a section in which the door is opened by itself without being damped by any damper 850. Becomes Of course, even in this section, the elastic force of the spring 823 described above acts in a direction that hinders the opening of the door, so that a phenomenon in which the door is rapidly accelerated in the section open by itself is sufficiently prevented.

Applying such an automatic door opening structure can reduce the user's anxiety, improve the quality sensitivity, and can delete the handle protruding toward the front of the door can provide an excellent aesthetic in particular when built-in installation.

Although the present invention has been described with reference to the drawings exemplified as above, the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those 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, even if the above described embodiments of the present invention while not explicitly described by describing the effect of the configuration of the present invention, it is obvious that the effect predictable by the configuration is also to be recognized.

10: latch holder
100: holder body
101: base surface
110: latch entrance and exit
111: outer slope
112: internal slope
113: upper wall
114: side wall surface
120: lever support
121: extension member
122: lever support shaft
123: shielding 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 portion
170: pusher drive unit fixing portion
180: hook receiving space
200: latch
210: latch pivot axis
220: latch bar
221: top slope
230: hook portion
231: backside slope
232: Lower end 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: power point
342: Spring High Government
350: direction switching unit
400: open detection switch
410: switch body
420: trigger
500: pusher
510: axis of rotation
520: rotating plate
530: pusher
531: curved portion
5311: Surface profile
5312: hold-down profile
540: pusher cam
600: pusher drive unit
610: motor
611: rotary drive shaft
612: housing
620: return stop switch
621: switch body
622: trigger
630: return spring
710: main body
720: door
800: hinge module
810: housing
811: spring catching plate
812: spring catching plate support pin
813: damper support pin
814: opening and closing rotary shaft
815: joint pin guide slot
820: spring interpolation pin
821: spring support pin
822: internal housing joint pin
823: spring
830: inner link housing
831: door bar connection hinge
832: damper pressurized surface
840: door bar
850: damper
851: piston
852 cylinder
853: slot

Claims (20)

A main body 710 having a cooking chamber therein, a door 720 for opening and closing an open front of the cooking chamber, and an opening / closing rotation shaft 814 serving as a rotation center of opening and closing of the door,
The opening and closing rotation shaft 814 is located on the front lower portion of the main body 710 and centers around the horizontal rotating shaft extending in the left and right directions, so that the door 720 is rotatably connected to the main body. It is a structure that is opened downward downward toward the rotation axis,
The door is a cooking appliance elastically added by a spring 823 in the direction in which the door is closed,
On the surface where the door 720 faces the main body 710, a latch 200 extending toward the main body 710 and pivoting about a horizontal pivot shaft 210 provided in the door 720 is provided. Being prepared,
The main body 710 corresponding to the position where the latch 200 is provided while the door 720 is closed is engaged with the latch 200 to maintain the door 720 closed or the latch 200. And the latch holder 10 is released so that the door 720 is opened.
A lever 300 is provided inside the latch holder 10 to push the latch 200 inserted into the hook receiving space 180 inside the latch holder 10 in the opening direction of the door 720.
When the lever 300 pushes the latch 200 in the opening direction of the door 720 and the door is opened at an angle a1, a force to open the door 720 by its own weight is applied to the spring 823. Larger than the force of the, the cooking apparatus of the door 720 is opened by its own weight.
The method according to claim 1,
The latch 200 is provided on both sides of the door 720,
The two latches 200 rotate independently,
The lever 300 is a cooking appliance provided only in any one of the latch holder 10 of the latch holder (10) of the two latches (200).
The method according to claim 2,
The latch 200 includes a latch bar 220 extending from the door toward the main body and a hook portion 230 provided to protrude downward from an end of the latch bar 220.
The latch 200 is added to the direction in which the hook portion 230 is downward,
On the rear surface of the hook portion 230 which faces the door, a rear slope surface 231 extending from the lower end of the hook portion 230 toward the latch bar 220 is provided.
In the state in which the door 720 is closed, the back sloped surface 231 maintains a state of interference with the inner sloped surface 112 of the latch holder 10,
The inner inclined surface 112 is a cooking device inclined upward toward the door from the main body.
The method according to claim 1,
The lever 300 is a cooking appliance for pushing up the latch 200 in the diagonal direction between the front and the upper.
The method according to claim 4,
The lever 300 is provided with a push portion 330 in contact with the latch 200,
The push unit 330 is disposed below the front of the center of rotation of the lever 300,
At the front end of the push unit 330, the pushing inclined surface 333 having a normal to the upper front is provided,
The lower end of the latch 200, the cooking appliance is provided with a front lower inclined surface 232 having a normal line toward the rear lower portion in contact with the push-up inclined surface (333).
The method according to claim 1,
The upper end of the latch 200 is provided with an upper inclined surface 221 inclined downward as the distance from the door,
In front of the latch holder 10 is provided a latch entry and exit hole 110 that is a passage through which the latch 200 is introduced into or withdrawn from the hook receiving space 180,
When the lever 300 contacts the upper wall surface 113, which is the ceiling surface of the latch entrance and exit hole 110, in the process of pushing the latch 200 upward and in the opening direction, the lever 300 contacts the upper wall surface 113. Cooker slid.
The method according to claim 1,
After the latch 200 is released by the lever 300 and is pushed in the opening direction, the latch 200 is elastically provided with a latch entry and exit hole 110 provided in front of the latch holder 10. Is seated on the outer slope 111 provided on the bottom of,
The outer inclined surface 111 is inclined downward toward the door from the main body.
The method according to claim 1,
At an opening angle a2 greater than the opening angle a1, a damping force starts to act on the direction in which the door 720 opens, but the opening angle a2 at which the damping force starts to act is greater than 30 ° 40. Cookware less than or equal to °
As a latch holder 10 used in the cooking appliance according to any one of claims 1 to 8,
A holder body 100 which forms the overall frame of the latch holder;
A latch entrance and exit hole 110 provided in front of the holder body 100 and serving as a passage through which the latch 200 enters and exits;
An outer inclined surface 111 provided below the latch entrance and exit hole 110 and inclined downward toward the front;
An upper wall surface 113 provided at an upper portion of the latch entrance and exit hole 110;
A lever support part 120 spaced apart from the rear of the latch entrance and exit hole 110;
A hook receiving space 180 provided between the latch entrance and exit hole 110 and the lever support part 120;
A lever 300 rotatably supported by the lever support part 120 and provided with a push part 330 provided at a front end thereof at a lower portion of the hook accommodation space 180;
A pusher 500 for rotating the lever support 120 to lift the lever 300; And
And a pusher driver (600) for driving the pusher (500).
The method according to claim 9,
The push unit 330 includes an interpolation member 331 provided at the tip of the lever 300, and an extrapolation member 332 extrapolated to the interpolation member 331,
The extrapolation member 332 is in contact with the latch 200, the latch holder for pushing the latch 200 in the opening direction of the door (720).
The method according to claim 10,
The extrapolation member 332 is a latch holder including a resin-based material having a lubricity surface having a higher wear resistance and a lower coefficient of friction than the interpolation member 331.
The method according to claim 9,
A latch holder having a front surface of the lever support portion 120 is provided with a shielding surface portion 123 for shielding the inside of the latch holder from the outside through the latch entrance and exit holes 110.
The method according to claim 12,
The lever 300 is supported by a second lever support shaft portion 122 provided on the second side surface of the lever support portion 120, and is rotatably installed adjacent to the second side surface of the lever support portion 120. ,
The lever 300 has a shaft portion 310 which is hinged to the lever support portion 120, and an acting portion 320 extending forward from the shaft portion 310,
The push unit 330 is extended to the first side from the front end of the action portion 320 is a latch holder accommodated in the lower portion of the hook receiving space (180).
The method according to claim 13,
The shielding surface portion 123 is a latch holder disposed to be offset laterally with respect to the lever inlet and outlet (110).
The method according to claim 9,
The push unit 330 is:
Top (334),
A bottom surface 335 disposed below the top surface 334 and extending further forward than the top surface 334,
A push-up inclined surface 333 connected to incline the front end of the top surface 334 and the front end of the bottom surface 335 and
It is provided on the lower end of the push-up inclined surface 333, and further provided with a pushing portion 336 protruding most forward from the push portion 330,
As the lever 300 is rotated and the push part 330 is lifted up, the latch 200 accommodated in the hook accommodation space 180 of the upper surface 334 and the lifting slope 333 is formed. A latch holder starting from the vicinity of the boundary and sliding to the lower end of the pushing-up inclined surface 333 and being lifted up by the force from the lever 300 and moving upward in the open direction.
The method according to claim 15,
The push part 330 is disposed below the center of rotation of the lever 300, and as the lever 300 rotates, the pusher 336 has a height equal to or greater than the center of rotation of the lever 300. Latch holder lifted to height.
The method according to claim 9,
The lever 300 further includes a force point portion 340 extending from the center of rotation of the lever 300 and receiving a force for rotating the lever 300 at a position spaced apart from the center of rotation.
The force point portion 340 and the holder body 100, the latch holder is connected by a return spring (630) for adding the force point portion 340 in the direction in which the push portion (330) goes down.
The method according to claim 17,
The lower part of the hook receiving space 180 is provided with an open detection switch 400 for detecting a closed state of the door,
The trigger 420 of the open detection switch 400 is disposed below the push unit 330,
The latch holder which is lowered by the return spring 630 does not press the trigger 420 in a state where the latch is not inserted into the hook receiving space 180.
The method according to claim 17,
The force point portion 340 is pressed by the pusher 500 in a direction opposite to the biasing direction of the return spring,
The pusher 500 is:
A rotating plate 520 rotated by the motor 610;
A pusher cam 540 provided at an eccentric position in the rotation center of the rotating plate 520 to rotate as the rotating plate 520 rotates, thereby pressing or releasing the force point 340; And
It is provided in a position eccentric from the center of rotation of the rotating plate 520, even if the rotating plate 520 is rotated as the pressing projection 530 is provided in a position that does not meet the lever 300;
In the vicinity of the pusher 500, the rotary plate 520 is rotated to return when the push projection 530 is located at a predetermined position, the return having a trigger 622 that is not pressed at a position outside the predetermined position Latch holder with stop switch (620) installed.
The method according to claim 19,
The pusher driver 600 for driving the pusher 500 is stopped when the trigger 622 of the return stop switch 620 is pressed.

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