KR960003266B1 - Function selecting switch for microwave-oven - Google Patents

Abstract

a back plate(10) attached to a back of a control panel, a bracket(20) fixed in the back side of the back plate, a shaft(30) mounted in the back plate, a cam(40) positioned in the bracket, a plurality of switches(50) in the back of the bracket, and a plurality of levers(60) whose one terminal is in contact with the cam and whose the other terminal has the switch. The switches(50) are inserted into the bracket(20) to be in parallel with the shaft(30) so that the input/output terminal(52) is toward the rear side of the back plates(10).

Description

Operating device of function selection switch for microwave oven

1 is a perspective view illustrating an embodiment of the present invention.

2 is a plan view illustrating one embodiment of the present invention.

3 is a perspective view illustrating the cam of the present invention.

4 is a plan view illustrating the prior art.

* Explanation of symbols for main parts of the drawings

10 back plate 20 bracket

30: shaft 40: cam portion

41: cam 50: switch

51: contact 60: lever

61: axis 70: knob

80: timer

The present invention relates to an operating device of a function selection switch provided in a control panel of a microwave oven, and more particularly, to an embodiment in which cost can be reduced and assembly of wiring and the like is good.

In general, the control panel of one side of the microwave is provided with an output control knob, a timer knob, a door open button, and the like to control various functions of the microwave oven.

It is used for a mechanical microwave oven having a single function mainly of a microwave oven in which the output adjustment knob and the timer knob are installed. When the output adjustment knob installed in the control panel is rotated clockwise, the output of the high frequency is gradually switched Depending on the type of food, high frequency output can be obtained.In addition, the timer knob installed separately rotates clockwise to set the time at the desired time on the scale of the knob. At the same time, the high frequency energy emitted from the magnetron is irradiated into the cooking chamber and cooking is performed for a set time.

On the contrary, in the case of a microwave oven having a variety of functions such as a convection oven or a grill, that is, a microwave oven having a grill function, a convection function, etc. in addition to a high frequency heating function, a membrane switch or a tag switch is installed on the control panel of the microwave oven. It is configured to control and operate the various functions described above.

However, when the membrane switch and the tag switch are installed in the microwave oven having various functions as described above, there is a problem in that the cost is significantly higher than installing the rotating knob of the mechanical microwave oven. There is a need for a device capable of operating switches for selecting the high frequency heating function, the convection function, and the like.

Therefore, in the related art, as shown in FIG. 4, the back plate 10 is attached to the back of the control panel of the microwave oven; A bracket 20 fixed to an upper back side of the back plate 10; A cam portion 40 arranged on a rear side of the shaft 30 installed through the back plate 10 and the bracket 20 and provided with a plurality of cams 41; The rear plate of the back plate 10 is installed to be stacked in a direction perpendicular to the shaft 30, it is configured by the switch 50 so that the contact 51 is turned on, off by the cam 41.

The back plate 10 is installed on the rear side of the control panel is a structural unit in which the timer 80 and the shaft 30 of the knob 70 and the like are installed, and the parts are firmly mounted and supported. .

The shaft 30 is installed through the back plate 10 and the bracket 20, and a plurality of cams 41 are provided at the rear of the shaft 30, that is, between the back plate 10 and the bracket 20. By having the cam portion 40 provided therein, when the knob 70 inserted at the front end of the shaft 30 is rotated, the cam portion 40 arranged behind the shaft 30 rotates and is installed on the back plate 10 rear surface. By selectively pressing the contacts 51 of the switches 50 to select the function of the switch 50 in which the contact 51 is pressed among the plurality of switches 50, the switches 50 are mainly a high frequency heating function, Since the circuit is configured with functions such as a grill function, a convection function, and the like, one or more of the above functions are selected.

However, the conventional technical configuration as described above is that the switches 50 installed on the back plate 10 are stacked at right angles to the shaft 30, and the number of switches 50 corresponding to the types of microwave functions. Since the cam 41 is stacked in multiple stages, the height of the entire cam portion 40 is increased, and at the same time, the length of the shaft 30 is also increased, which makes it difficult to maintain the right angle of the shaft 30. Therefore, the rotation of the knob 70 is not smooth, and the cam portion 40 inserted into the shaft 30 cannot operate the switch 50 correctly.

In addition, when the switches 50 are laid on the shaft 30 at a right angle to the shaft 30 to be horizontal to the back plate 10, the input / output terminals 52 provided in the switch 50 may have the back plate 10. Is installed in close proximity to the bar, the process of coupling the wiring housing connected to the terminals 52 is a very difficult problem, because the switches 50 occupy a considerable area of the back plate 10 However, there is a drawback to being limited in appearance specifications.

Accordingly, an object of the present invention is to provide a device for operating a function selection switch for a microwave oven, which can reduce cost and accurately open and close a contact point of a switch while maintaining a right angle of a shaft.

Hereinafter, described in detail with reference to the accompanying drawings a preferred embodiment that can achieve the above object is as follows.

That is, the present invention is the back plate 10 and the secondary block on the rear of the control panel; A bracket 20 fixed to an upper back side of the back plate 10; A shaft 30 installed through the back plate 10; A cam part 40 which is arranged at the rear of the shaft 30 and is located in the bracket 20 and is provided with a plurality of cams 41; A plurality of switches 50 inserted into the rear of the bracket 20; It is arranged in the bracket 20, one end is in contact with the cam 41 and the other end is composed of a plurality of levers 60 in contact with the contact 51 of the switch 50.

The back plate 10 is installed on the rear side of the control panel is a structural unit in which the timer 80 and the shaft 30 of the knob 70 and the like are installed, and the parts are firmly mounted and supported. .

The shaft 30 is installed through the back plate 10 and the bracket 20, and a plurality of cams 41 are provided at the rear of the shaft 30, that is, between the back plate 10 and the bracket 20. By having the cam portion 40 provided therein, when the knob 70 inserted at the tip of the shaft 30 is rotated, the cam portion 40 arranged behind the shaft 30 is rotated. It is a technical configuration.

However, the most important feature in the configuration of the present invention is to accumulate a plurality of levers 60 in the center of the bracket 20, one end of the lever 60 is in contact with the cam 41 and the other end is the contact of the switch 50 When the cam portion 40 built up behind the shaft 30 is rotated by rotating the knob 70 inserted at the tip of the shaft 30 by contacting the 51, the end portion of the lever 60 is rotated. Among the plurality of cams 41 of the cam portion 40 is selectively pressed according to the rotation angle, and thus moved to the other end of the lever 60 selectively pressed about the shaft 61 to the contact of the switch 50 Since it is to press, it is to select the function of the switch 50, the contact point 51 of the plurality of switches 50 is pressed, mainly the switch 50 functions such as high-frequency heating function, grill function, convection function, etc. And one or more of the above functions because they are circuitry with Which will make the choice.

In the present invention, the switches 50 installed on the back plate 10 at the rear of the back plate 10 are stacked at right angles to the shaft 30, thereby increasing the height of the cam part 40 by the height of the switch 50. Since the width of the part contacting the cam 41 can be arbitrarily adjusted when forming one end of the lever 60 in contact with the cam part 40, the end of the lever 60 is switched by the switch 50. If the narrower than the width of the) is the height of the overall cam portion 40 is lowered, the length of the shaft 30, the cam portion 40 is built is also shortened along the easy to maintain the right angle of the shaft 30 It will be lost.

Accordingly, the rotation of the knob 70 can be maintained, and the cam portion 40 inserted into the shaft 30 can accurately operate the switch 50.

In addition, since the switches 50 are inserted into the bracket 20 so as to be horizontal with the shaft 30, the input / output terminals 52 are configured to face the back of the back plate 10, and thus, the switch ( 50 are installed so that the shaft 30 is perpendicular to the shaft 30, that is, horizontal to the back plate 10 so that the input / output terminals 52 provided in the switch 50 are installed close to the back plate 10. Since the closing end is prevented, work processes for joining the wiring housings connected to the terminals 52 are considerably simplified, and the ratio of the switches 50 to occupy the area of the back plate 10 is low. Since it is to be, there is an effect that is not limited to a lot of appearance specifications.

In the present invention as described above, a plurality of levers 60 are arranged in the center of the bracket 20, one end of the lever 60 is in contact with the cam 41 and the other end is the contact 51 of the switch 50. ), The rotation of the knob 70 can be smoothly maintained, and the cam portion 40 inserted into the shaft 30 can not only accurately operate the switch 50 but also the switch 50. Work processes for assembling the wiring housing connected to the terminals 52 are greatly simplified.

Claims (2)

A back plate 10 attached to the rear of the control panel; A bracket 20 fixed to an upper back side of the back plate 10; A shaft 30 installed through the back plate 10; A cam portion 40 arranged in the rear of the shaft 30 and positioned in the bracket 20, and having a plurality of cams 41; A plurality of switches 50 inserted into the rear of the bracket 20; It is built in the bracket 20, the function of the microwave oven, characterized in that is configured by a plurality of levers 60, one end is in contact with the cam 41 and the other end is in contact with the contact 51 of the switch 50 Actuation of the selector switch. The method of claim 1, wherein the switch 50 is inserted into the bracket 20 so as to be parallel to the shaft 30 so that the input and output terminals 52 to the rear of the back plate 10, characterized in that Actuator for function selection switch for microwave oven.