KR0140036B1 - Timer switch of microwave oven - Google Patents

Abstract

The present invention relates to a timer switch of a microwave oven, and more particularly, to set an operation time of a timer switch for setting an operation time of a microwave oven and an operation of a function switch for selecting a function of a microwave oven using one adjustment knob. The present invention relates to a timer switch of a microwave oven that allows a timer knob adjustment knob and a function knob switch adjustment knob separately. Therefore, in the present invention, as shown in FIG. 4, the two rotary rings 50 and 52 are moved to and fro the rotating shaft 22 fixed to the on / off of the timer switch 38 and the function selection switch 60. The release ring 56 corresponding to the number of functions of the microwave oven is formed at a predetermined interval in the rotary rings 50 and 52 for controlling the operation and controlling the on / off operation of the timer switch 38. In the rotary rings 50 and 52 for controlling the on / off operation of the 60, the two separation rings 50 are formed on one rotation shaft 22 by forming the separation grooves 56 at different intervals for each function setting area. By fixing the 52, one adjustment knob has the effect of controlling the on / off operation of the timer switch 38 and the function selection switch 60.

Description

Microwave timer switch.

1 is an exploded perspective view of main parts of a conventional timer switch;

2 is an enlarged perspective view of main parts of a conventional timer switch;

3 is an enlarged cross-sectional view of main parts of a conventional timer switch;

4 is an enlarged perspective view of main parts of a timer switch according to the present invention;

5 is a cross-sectional view showing the main operation state of the timer switch according to the present invention;

6 is a cross-sectional view showing the main operation state of the timer switch according to the present invention;

7 (a) and (b) of FIG. 7 is a plan view of the main body of the switch for explaining the configuration of the rotary ring for the timer switch operation of the timer switch according to the present invention and the rotary ring for selecting the microwave function.

* Explanation of symbols for the main parts of the drawings

12: lower case 14: gear part

16: Upper case 18: fixing hall

20: fixed hole 22: rotary shaft

24: Gear 26: Rotating Ring

28: Outer Cast 30: Breakaway Home

32: A meeting person 34: A projection part

36: Timer switch 38: Adjustment knob

39: Adjustment knob 40: Secondary rotary ring

42: protrusion 44: protrusion

46: support member 48: gear part

50: rotating ring 52: rotating ring

56: Breakaway Home 58: Outer Cast

60: function selection switch 62: outer peripheral

64: Breakaway groove

The present invention relates to a timer switch of a microwave oven, and more particularly, to set an operation time of a timer switch for setting an operation time of a microwave oven and an operation of a function switch for selecting a function of a microwave oven using one adjustment knob. To a timer switch of a microwave oven.

In general, a timer switch used in a home appliance including a microwave oven is also referred to as a time limit switch or a time switch, which is a constant switching element that performs switching operation at a predetermined time.

The usual timer switch is a simple fertilizer structure that combines the contact of a rotating or interlocking machine with a clock or a motorized clock, and the timer can be adjusted from 60 minutes to 24 hours in full scale. There are switch products.

In electric timer switches used for automation, time, and control for industrial and office purposes, a small synchronous motor, an electronic clutch, and a contact mechanism are generally combined inside a timer switch. It has a structure that can withstand repeated operation, and the scale of the switching time is put into practical use as a timer switch that can set a wide time from at least 0.2 seconds to 24 hours.

Combination of capacitor and resistance to make time change by using charge and discharge of capacitor and resistor, so that it can be relayed by using vacuum tube or transistor discharge tube UJT (Unijunction Transistor) or SCR (Silicom Controlled Rectifier) There is an electronic timer that controls the voltage, which can be changed or tangentially converted into a resistor combined with a capacitor to create a timer switch in many time ranges.

Of these timers, the present invention relates to a timer that is conventionally applied to home appliances (the present invention is described by using a microwave oven among many home appliances) as an arbitrary time, which is illustrated in FIGS. Same as FIG.

The timer switch of the microwave oven, which sets the operating time of the microwave oven, is composed of a gear unit 14 composed of gears which are rotated by being engaged with each other in the inner space of the lower case 12, and the small synchronization is attached to the bottom of the lower case 12 It is formed to control the rotation ratio of the motor, the rotational force of the small synchronous motor through the gear portion 14 is inserted into the fixing hole 18 of the upper case 16 and the fixing hole 20 of the lower case 12 to rotate. It is to be transmitted to the gear 24 of the rotating shaft 22, the bottom surface of the gear 24 is formed on the outer periphery 28 of the outer periphery 28 of the outer ring 26 to form a leaving groove 30 of the rotor 32 As the protrusion 34 is located at the outer circumferential edge 28 and the separation groove 30, the timer switch 36 may be driven.

The adjustment knob 38 is fixed to the end of the rotating shaft 22 inserted into the fixing hole 18 of the upper case 16 and exposed to the outside of the upper case 16 by forcibly rotating the rotating shaft 22. The operating time of the microwave oven can be set.

In addition, one end of the gear unit 14 formed on the bottom of the lower case 12 is connected to the function selection switch of the microwave oven, and the gear unit 14 is connected to the tack gear 40 by using the adjustment knob 39 When the function of the microwave oven is selected, the function selection switch is configured to operate by the rotational force of the small synchronous motor through the gear unit 14 formed on the bottom surface of the lower case 12.

In the conventional timer switch configured as described above, when the set time is zero, as shown in FIGS. 2 to 3, the protrusion 34 of the rotor 32 is separated from the groove 30 of the rotary ring 26. ), The contact of the timer switch 36 is maintained in an off state because the side of the timer switch 36 is not pressed.

Therefore, the main power supplied to the microwave heater through the timer switch 36 is cut off, so that the heater does not operate, so that heat generation does not occur in the oven.

However, the projection 34 of the rotor 32 which has been separated from the release groove 30 of the rotary ring 26 by rotating the adjusting knob 38 exposed to the outside of the outer case of the microwave oven clockwise or counterclockwise. When positioned on the outer circumferential edge 28 of the rotary ring 26, the rotor 32 having the protrusion 34 is pressed on one side of the timer switch 36, the timer switch 36 is connected to the on state.

Therefore, the main power is supplied to the heater of the microwave oven via the timer switch 36, so that the heater generates heat to cook food contained in the oven of the microwave oven.

The time for keeping the timer switch 36 on depends on which part of the outer periphery 28 of the rotary ring 26 the projection 34 of the rotor 32 is turned by turning the adjusting knob 38. The rotational force of the small synchronous motor is proportionally longer as it is located away from the disengagement groove 30 in the direction opposite to the rotational direction in which the rotational ring 26 is rotated through the gear 24 after the rotational ratio is changed through the gear portion 14. You lose.

If you want to set a longer cooking time using a microwave oven by rotating the control knob 38 in the direction opposite to the rotation direction by the small synchronous motor through the gear unit 14 in the opposite direction of the departure groove 30 ( The protrusions 34 of the rotor 32 may be positioned at 28.

Although the cooking time of the microwave was set in the timer configured and operated in this way, the microwave oven was prevented from being burned by the heat generated by the heater in the oven when the oven door was opened and the food was taken out before the set time. The main power supply to the electric heater of the microwave oven can be cut off when the door of the door is opened, and the delay time is not zero to prevent the small synchronous motor from running even though the timer has not set the delay time. The main small synchronous motor is driven to reduce power consumption and to remove noise due to the operation of the small synchronous motor, and the small synchronous motor can be operated for a long time by setting a delay time for the timer. There .

However, by switching the adjustment knob 38 of the timer to move the projection 34 of the rotor 32 from the release groove 30 of the rotary ring 26 is located on the outer periphery 28 to drive the electric heater of the microwave oven. It supplies power to cook food contained in the refrigerator, but when food cooking is completed before the time set in the timer, the food placed in the microwave oven is taken out, and the microwave oven door is closed, the time corresponding to the remaining time set by the timer The main electric power was continuously supplied to the heater of the microwave oven, but there was a drawback of wasting power even though no food was contained in the refrigerator.

In order to finish cooking before the cooking time set by the timer switch and to cut off the main power supplied to the heater of the microwave oven, the protrusion 34 of the rotor 32 located on the outer circumferential edge 28 of the rotary ring 26 is provided. There was an inconvenience to rotate the adjustment knob 38 to switch the timer switch 36 in the on state inserted into the leaving groove 30 of the rotary ring 26 in the off state.

In addition, there is a hassle to select a function of a microwave oven by rotating a control knob 39 for selecting a function of a microwave oven (melting, strong, medium, weak) in addition to the conventional microwave timer switch.

That is, in order to operate the microwave oven, there was a need to operate the adjusting knob 38 for operating the timer switch and the adjusting knob 39 for selecting the function of the microwave oven, respectively.

Therefore, the present invention has been devised to solve the above-mentioned troubles, by fixing the microwave function selection rotary ring on the axis of which the rotation ring of the timer switch is fixed, the operation time setting of the timer switch and the electronic switch with one adjustment knob It is an object of the present invention to provide a timer switch of a microwave oven in which a function of a range can be selected.

In the microwave oven of the present invention for realizing this, in a microwave oven having a timer switch for setting the operating time of the microwave oven and a function selection switch for selecting the function of the microwave oven, to set the operation of the timer switch. Each of the rotary rings for operating the timer switch and the function selection switch is installed on the rotating shaft fixed with the adjustment knob, and a number of leaving grooves corresponding to the functions of the microwave oven are formed at regular intervals on the outer circumference of the rotary ring, and the rotation At the outer periphery of the ring, a separation groove is formed at different intervals in a rotation ring corresponding to the separation groove of the rotation ring, and at one end of the rotation shaft, a shear portion is formed to be engaged with the gear portion, so that the rotational force of the gear portion is decelerated on the rotation shaft It was made possible.

Hereinafter, the configuration of the present invention in more detail with reference to the accompanying drawings as follows.

The present invention is a microwave oven timer switch having a rotary shaft 22 that rotates in accordance with the rotation of the adjustment knob fixed to the outer case as shown in Figure 4, the lower end of the rotary shaft 22, the auxiliary rotary ring 40 ) Is coupled to the lower case by a support member 46, the rotary shaft 22 is fixed to the rotary ring 50, 52 for operating the function selection switch 60 and the timer switch 36, The gear shaft 48 is formed on the rotation shaft 22 between the rotation rings 50 and 52 so as to be engaged with the gear portion 14.

Here, the outer periphery 58 of the rotary ring 50 that controls the operation of the timer switch 36 is formed with a separation groove 56 corresponding to the number of functions of the microwave oven at a predetermined interval, and the function selection switch 60 A timer switch 38 and a function selection switch 60 are formed on the outer circumferential edge 62 of the rotary ring 52 for controlling the operation by having a release groove 64 having a different distance from the gap between the respective release grooves 56. It is possible to control the operation of.

Here, the timer switch 36 and the function selection switch 60 of the present invention are provided in the separation grooves 56 and 64 formed on the outer circumference of the rotary rings 50 and 52. The protrusion formed on the rear surface of the contact formed at the end of the 60 is inserted so that the timer switch 36 and the function selection switch 60 remain in the off state, but at this time, the timer switch 36 and the function selection switch 60 are turned off. The state is maintained until the protrusion 42 is completely separated from the release grooves 56 and 64 at the time when the protrusion 42 formed on the contact back surface is inserted into the release grooves 56 and 64. Timer switch 36 and the function selection switch 60 can adjust the off state holding time by the interval of 64, and the timer switch 36 and the function selection switch at intervals between the release grooves 56 and 64. It is possible to adjust the holding time of the 60 state.

5 and 6 are cross-sectional views showing the main operation state of the timer switch 36 according to the present invention. The timer switch 35 and the function selection switch 60 are turned on by pressing and pulling the adjustment knob in the up and down direction. 7 is a plan view of the main part of the rotation ring 50 for the timer switch operation of the timer switch 36 and the rotation ring 52 for explaining the configuration for the microwave function selection.

Referring to the operational effects of the present invention configured as described above are as follows.

First, FIG. 6 illustrates the cooking time and the microwave function by rotating the adjusting knob 38 of the microwave oven while pressing the adjusting knob 38 in the downward direction. As shown in FIG. When the handle 38 is pulled upward, the protrusion 42 of the rotary shaft 22, which was supported by the support member 46, is separated from the support member 46, and the protrusion 44 of the rotary shaft 22 is supported by the support member 46. And the gear part 14 is engaged with the gear part 48 formed on the rotating shaft 22 to rotate, and at the same time, the rotary rings 50 and 52 have a timer switch 38 and a function selection switch 60. ) Will stay on.

Therefore, the power source passing through the timer switch 36 is applied to the small synchronous motor of the timer switch to drive the small synchronous motor, so that the gear unit 14 transmits the rotational force of the small synchronous motor to the rotary shaft 22, and the timer switch 36. ) And a function selection switch 60 is applied to the heater to generate heat in the microwave oven.

On the other hand, when pressing the adjustment knob 38 of the microwave oven downward, the rotary rings 50 and 52 are separated from the timer switch 36 and the function selection switch 60 regardless of the cooking time setting and the microwave function selection. Since the outer circumferences 58 and 62 of the rotary rings 50 and 52 do not press the terminals of the timer switch 36 and the function selection switch 60, the timer switch 36 and the function selection switch 60 are Will remain off.

That is, regardless of the operation of the timer switch 36 and the function selection switch 60 driven by the adjusting knob 38, the power supplied to the small synchronous motor and the heater can be cut off.

The operation of the timer switch 36 and the function selection switch 60 by the rotary rings 50 and 52 will be described in more detail with reference to FIG. 7 to illustrate the functions of the microwave oven (melting, weak, medium, strong). Rotating ring 50 formed with a number of leaving grooves 56 corresponding to a predetermined interval and a rotating ring 62 formed with leaving grooves 56 at different intervals according to the function of the microwave oven are provided on the rotating shaft 22. It is fixed and rotates at the same rotation speed.

After setting the function of the microwave oven using the rotary ring 52 among the rotating rings 50 and 52 rotating at the same rotation speed, the microwave oven is set in the set function. Run for hours.

That is, the rotary ring 52 cuts / supplies the power supplied to the heater at different time intervals according to the function of setting the function selection switch 60, and the operation time of the function selection is determined by the timer switch 36. Performed only while located on the outer periphery 58 of the rotary ring 50 and one side terminal of the timer switch 36 is inserted into the breakaway groove 56 so that the timer switch 36 maintains the off state function selection switch 60. ) Also does not work.

7, the rotary rings 50 and 52 rotate at the same speed as described, and the rotary switch (adjustment knob 38) set in the function of melting among the function selection functions. Rotation of the function selection switch 60 is repeated on / off while the timer switch 36 and the function selection switch 60 is turned off at the 270 ° position of the rotary ring 50 does not operate will be.

In addition, when food cooking is completed before the set time, the timer switch 36 and the function selection switch 60 are simultaneously turned off by pressing the adjustment knob 38 together to easily solve the waste of power.

As described above, the present invention moves the rotating shaft in which two rotary rings are fixed to the front and rear, so that the timer switch controls the on / off operation of the function selection switch, and the rotary ring controls the on / off operation of the timer switch. Two rotation rings on one rotating shaft are formed in the rotation ring that forms the separation groove corresponding to the number of functions of the range at regular intervals and controls the on / off operation of the function selection switch at different intervals for each function setting area. By fixing a single control knob has the effect of controlling the on / off operation of the timer switch and the function selection switch.

Claims (1)

Claim 1 In the microwave timer switch having a rotary shaft 22 is fixed to the outer case and rotates in accordance with the adjustment knob rotation, the lower end of the rotary shaft 22 is coupled to the auxiliary rotary ring 40 and the support fan 46 on the upper end Forming projections 42 and 44 to be inserted into the rotary shafts, and fixed to the rotary shafts 22 to rotate the rotation rings 50 and 52 for operating the function selection switch 60 and the timer switch 36, and the rotation Microwave oven timer switch characterized in that the gear shaft (48) is formed on the rotating shaft (22) between the rings (50) and (52) to engage with the gear portion (14). Claim 2 The outer periphery 58 of the rotary ring 50, which controls the operation of the timer switch 36, is provided with a separation groove 56 corresponding to the number of functions of the microwave oven at a predetermined interval. The outer peripheral portion 62 of the rotary ring 52 for controlling the operation of the switch 60 functions as the timer switch 36 to form a separation groove 64 having a different interval from the interval between the respective separation grooves 56, respectively. Microwave oven timer switch characterized in that to control the operation of the selection switch (60).