Microwave Door Latch Drive

专利摘要:
The present invention relates to a door latch driving apparatus of a microwave oven, and is rotated with one side of the release button 10 by the forward and backward movement of the release button 10 and the release button 10, the door latch 30 It is composed of a release lever 20 to operate and the contact of the release button 10 and the release lever 20 is characterized in that it is made at a maximum position away from the center of rotation of the release lever 20. According to such a door latch driving device there is an advantage that the force for opening the door is minimized to soften the operation feeling of the button for the door operation.
公开号:KR19990039971A
申请号:KR1019970060241
申请日:1997-11-15
公开日:1999-06-05
发明作者:박용출
申请人:구자홍；엘지전자 주식회사；
IPC主号:

专利说明:

Microwave Door Latch Drive
The present invention relates to a microwave oven, and more particularly, to a door latch driving apparatus of a microwave oven configured to open a microwave door smoothly with a smaller force.
1 shows components for driving a door in a typical microwave oven. According to this, the release button 10 is installed through the lower surface of the control panel (1). A return spring l5 is provided between the release button 10 and the control panel 1 to return the pressed release button 10 to its original position. A plurality of release legs 11 are formed on the rear surface of the release button 10 and protrude to the rear surface of the control panel 1 through the control panel 1. Reference numeral 14 denotes an obstacle.
On the rear surface of the control panel 1, a release lever 20 actuated by the release leg 11 is rotatably installed about the hinge shafts 21 and 21 '. The release lever 20 is rotated by the release button 10 to operate the door latch 30 to be described below.
And the door latch 30, the one end of which is elastically supported by the latch spring 35 is hooked to the latching jaw 33 of the latch board 32 is installed. The door latch 30 is detached from the locking jaw 33 by the release lever 20 so that the door can be opened. Here, the latch spring 35 supports the door latch 30 with elasticity in the direction in which the door latch 30 is caught by the locking jaw 33.
When the door is opened and closed in the conventional microwave oven having the configuration as described above are as follows.
When the door is closed, the door latch 30 is caught by the latching jaw 33 of the latch board 32. At this time, one end of the door latch 30 is supported by the latch spring 35. The force is received in the direction of removal from the latching jaw 33 of the latch board 32. When the release button 10 is pressed in this state, the release leg 11 of the release button 10 rotates the release lever 20 counterclockwise on the drawing. The release lever 20 is rotated to push the door latch 30 so that the door latch 30 is removed from the latching jaw 33 of the latch board 32. Once the door latch 30 is removed from the locking step 33, the door is opened.
And the door is closed as follows. When the user pushes the door, the door latch 30 is caught by the tension of the latch spring 35 on the latching jaw 33 of the latch board 32 so that the door is closed.
However, the installation position of the release button 10 is inevitably limited by using a complicated exterior design of a microwave oven and a component such as the door latch 30 or the latch board 32 in common in various models. The end leg of the release leg 11 is in a straight line so that the contact point between the release leg 11 and the release lever 20 rotates when the release leg 11 and the release lever 20 rotate. It is located relatively close to the center of rotation of 20). In particular, at the end of the rotation of the release leg 11 and the release lever 20, this phenomenon is more severe, and the force for pressing the release button 10 to open the door is relatively large.
And the release leg 11 is a linear movement as the release button 10 is pressed, while the release lever 20 is a rotational movement, as shown by the dashed line in Figure 4, at the end of the rotation The area where the release leg 11 and the release lever 20 contact each other becomes relatively small. In this case, there is a problem in that the user presses the release button 10.
Therefore, an object of the present invention is to solve the problems of the prior art as described above, to minimize the force required to open the door and to improve the operation feeling of the release button.
1 is an exploded perspective view showing the configuration of a door latch driving apparatus of a microwave oven according to the prior art.
Figure 2 is a side cross-sectional view showing the configuration of a release button according to the prior art.
3 is a rear view of the release button shown in FIG.
4 is an operation state diagram for explaining that the door latch driving apparatus of the microwave oven according to the prior art is operated.
Figure 5 is a side cross-sectional view showing the configuration of a button constituting the door latch driving apparatus of the microwave oven according to the present invention.
6 is a rear view of the button shown in FIG.
7 is an operating state diagram for explaining that the door latch driving apparatus of the microwave oven according to the present invention is operated.
* Explanation of symbols for main parts of the drawings
1: Control Panel 10: Release Button
11: release leg 14: obstacle
20: release lever 21,21 ': hinge axis
30: door latch 32: latch board
33: culling jaw 35: stretch spring
In order to achieve the object of the present invention as described above, the release leg formed on the rear surface moved back and forth is composed of a release button and a release lever rotated with the release leg by the forward and backward movement of the release button to operate the door latch. The release leg of the button and the focusing of the release lever are provided at the door latch driving apparatus of the microwave oven, wherein the release lever is positioned at a maximum distance from the rotation center of the release lever.
One side of the release leg of the release button in contact with the release lever is formed to be inclined by an angle at which the release lever is rotated to release the door latch is rotated with the release lever at the end of the rotation of the release lever.
According to the present invention as described above, while the operation force required to open the door of the microwave oven is minimized, the operation feeling of the release button is improved.
When described in detail with reference to the accompanying drawings a preferred embodiment of the door latch driving apparatus of the microwave oven according to the present invention as described above.
5 is a side cross-sectional view showing the configuration of a button constituting the door latch driving apparatus of the microwave oven according to the present invention, Figure 6 is a rear view of the button shown in FIG.
As shown in these figures, the release button 10 is installed on the control panel 1 so as to be movable back and forth. A plurality of release legs 11 are formed on the back of the release button 10. The release leg 11 penetrates the control panel 1 and protrudes toward the rear surface of the control panel 1. Herein, the shape of the end section of the release leg 11 will be described in detail.
The lower portion 11L of the end section of the release leg 11 is formed to protrude relative to the upper portion 11U to form a plane perpendicular to the protruding direction of the release leg 11. This is the hinge axis that the contact point of the release button 10, the release leg 11 and the release lever 20 in the center of rotation of the release lever 20 at the beginning of the rotation of the release button 10 and the release lever 20 This is to minimize the button operation force by moving away from (21, 21 '). The upper end 11U of the end section of the release leg 11 is formed to be inclined. At this time, the inclination angle θ1 is preferably equal to the rotation angle θ of the release lever 20 which rotates and rotates with the release button 10. This is to maximize the contact area between the release leg 11 and the release lever 20 of the release button 10 at the end of the rotation of the release button 10 and the release lever 20. To this end, the inclined top portion 11U of the end section is formed in an inverted trapezoid rather than a circular shape as shown in FIG. However, the upper 11U shape of the end section of the release leg 11 is not limited to the inverted trapezoid, and any shape as long as it can maximize the end contact area between the release leg 11 and the release lever 20. It may be.
Meanwhile, the release lever 20 is rotatably installed on the rear surface of the control panel 1 about the hinge shafts 21 and 21 'and is rotated by the release leg 11 of the release button 10. The release lever 20 is rotated about the hinge shafts 21 and 2l ′ to remove the door latch 30 from the latching jaw 33 of the latch board 32.
Hereinafter will be described in detail the operation of the embodiment of the present invention having the configuration as described above.
First, when the door of the microwave oven is closed, when the user pushes the door, the door latch 30 in the door overcomes the holding force (Fx) of the latch spring 35 and is applied to the latching jaw 33 of the latch board 32. Is done. At this time, the door latch 30 is continuously caught by the latching jaw 33 by the holding force Fx of the latch spring 35.
In order to open the closed door, the user must press the release button 10 to allow the door latch 30 to be removed from the latch board 32. This will be described in more detail as follows.
When the release button 10 is pressed, the release leg 11 of the release button 10 rotates the release lever 20. Here, in the initial rotation of the release leg 11 and the release lever 20, the lower end 11L of the end section of the release leg 11 comes into contact with the release lever 20. Therefore, F = Fχ × ι / R (where F is the operating force of the release button 10, Fx is the tension of the latch spring 35, R is the release lever 20 at the contact point between the release leg 11 and the release lever 20). Distance to the hinge shafts 21 and 21 ', which are the centers of rotation, is the hinge shafts 21 and 21', which are the centers of rotation of the release levers 20 at the contact points of the release lever 20 and the door latch 30. Operating force of the release button 10 given by the formula However, the distance 1 between the tension Fx of the latch spring 35 and the contact point between the release lever 20 and the door latch 30 is considered to be constant. This result is given because the distance R from the contact point of the release button 10 to the release lever 20 is relatively far from the center of rotation of the release lever 20.
In addition, at the end of the rotation of the release button 10 and the release lever 20, the contact between the release leg 11 and the release lever 20 is made on the inclined surface of the upper end 11U of the end section of the release leg 11. . At this time, since the release button 10 makes a linear movement and the release lever 20 rotates, the upper end portion of the end leg 11 of the release leg 11 inclined by an angle θ at which the release lever 20 is rotated. 11U) and the release lever 20 are in contact with each other to distribute the tension of the maximum stretch spring (35). Therefore, the operation feeling transmitted to the user is smoothed.
As the release button 10 and the release lever 20 are rotated as described above, the release lever 20 finally removes the door latch 30 from the latching jaw 33 of the latch board 32 so that the door is closed. To be open.
Using the door latch driving apparatus of the microwave oven according to the present invention as described above in detail has the effect of being able to open the door with a smaller operating force and a better feeling of operation.

权利要求:
Claims (2)
[1" claim-type="Currently amended] A release button having a release leg formed on a rear side thereof, a release lever pivoted with one side of the release leg by a forward and backward movement of the release button, and a door lever operating the door latch, and a contact point of the release leg and the release lever with the release lever Door latch drive device of the microwave oven, characterized in that the inclined end of the release leg so as far away from the rotation center of the.
[2" claim-type="Currently amended] According to claim 1, wherein the inclination angle of one side of the release lever of the release button in contact with the release lever is formed to be inclined by the angle that the release lever is rotated to release the door latch to the end of the rotation of the release lever Door latch drive device of the microwave oven, characterized in that rotated with the lever.

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同族专利:

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公开号 | 公开日

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KR100254606B1|2000-05-01|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
1997-11-15|Application filed by 구자홍, 엘지전자 주식회사

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1997-11-15|Priority to KR1019970060241A

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1999-06-05|Publication of KR19990039971A

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2000-05-01|Application granted

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2000-05-01|Publication of KR100254606B1

优先权:

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申请号 | 申请日 | 专利标题

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KR1019970060241A|KR100254606B1|1997-11-15|1997-11-15|Door latch for microwave oven|