KR930000697Y1 - Timer - Google Patents

Abstract

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Description

timer

1 is a cross-sectional view of one embodiment of the present invention.

2 is a perspective view of a microwave oven using an embodiment of the present invention.

3 is a sectional view taken along line III-III of FIG.

4 is a cross-sectional view taken along IV-IV of FIG.

Fig. 5 (1) is a simplified side view of the embodiment.

5 (2) is a view showing a mechanism for outputting an electrical signal from the timer main body.

6 is a circuit diagram illustrating the supply of electricity to a motor.

7 (1) and (2) show the knob 11 in operation.

8 is a waveform graph showing an electrical signal 20 output from a timer main body (7).

9 (1), (2) and (3) are diagrams describing the operation of the timer (1).

* Explanation of symbols for main parts of the drawings

1: Timer 3: Front Panel

4: sidewall 5: carver

6: frame 7: timer body

10: operation shaft 11: knob

12 stem portion 13 flange

14: knob 15: first projection

16: driving lever 20: second projection

The present invention relates to a timer useful for microwave oven toaster ovens and the like for calculating the desired time of cooking.

Conventionally, a timer is provided in a microwave oven or the like and the food is heated by acting on the heating means of the microwave oven for a predetermined time set by this timer, and the food heating is automatically stopped when this predetermined time has elapsed.

In such a microwave oven, a heating time is required to be set in a timer and heating is performed every hour.

For example, a heating time of approximately one minute is very often used for microwave ovens having a high frequency output of approximately 500W.

Therefore, in order to simplify the setting operation of the heating time, the microwave oven has also been realized in the past, and there is a so-called electronic one minute having a charge / discharge circuit composed of a resistor capacitor, a comparator, etc., separate from the mechanical timer. A timer or the like is provided for distinguishing the level of the output there and for performing the time calculation operation.

Microwave ovens are also known with timers that combine rotary switches and microwave processors (USP 4849595).

However, as described above, such electronic timer separation equipment for frequently installed heating times often excessively raises the value of the microwave oven.

The present invention provides a timer composed of a timer body having an operating shaft capable of rotating and angled around its axis in its original position, and the desired angle after the operating shaft has rotated from its original position to the desired position. From the position to the original position only output the continuous electrical signal for the duration of the return time, the knob is installed at one end of the operating shaft, the push button can be pressed at a certain distance, and the drive means Rotate the operating shaft in its original position by the angle corresponding to the distance to be pressed.

Accordingly, the present invention provides a timer that can calculate a predetermined period of time by a relatively simple structure and a single operation.

Embodiment In the timer of the present invention, the timer body has an operating shaft on which a knob is installed.

When this knob rotates around the axis of the working shaft by the desired angle, the rotating shaft returns in the reverse direction in the period corresponding to the rotating angle.

The timer body continuously outputs an electrical signal during the period in which the operating shaft rotates to return.

The desired period calculation can be performed based on this electrical signal.

Further, the timer of the present invention is provided with a driving means connected by a push button and a push button.

When the push button is pressed, the drive means can also be output from the timer body during the period in which the operating shaft returns in the reverse direction by a predetermined angle in the direction of the manual rotation operation corresponding to the pushed distance of the push button. Operational calculations for the corresponding period can be performed.

1 is a cross-sectional view of a timer 1 which is an embodiment of the present invention, and FIG. 2 is a perspective view of a microwave oven 2 provided with a timer 1.

In particular, FIG. 1 is a cross-sectional view of the timer 1 taken along the line 1-1 of FIG. 2.

The microwave oven 2 heats food using dielectric heating.

That is, the high frequency electric field generated by the magnetron (not shown) of the microwave oven 2 is applied to the food placed there, so that the food is heated.

The cover 5 is attached in front of the microwave oven 2 and the knob 11 and push button 29 of the timer 1 are installed on the cover 5 and protrude therefrom.

The cover 5 has a front panel 3 and a side wall 4 fixed to the frame 6 of the microwave oven 2.

The flange 7a of the timer body 7 is fixed to the mounting member 30 of the frame 6 by screws 8, 9 on the side opposite the front panel 3.

The operating shaft 10 of the timer body 7 extends through the mounting member 30 toward the side of the front panel 3 and the knob 11 is fixed to this operating shaft 10.

The knob 11 extends through and protrudes from the flange 13 and the front panel 3 adjacent to the inner surface of the front panel 3 of the stem portion 12 attached to the actuating shaft 10. ).

Further, a substantially triangular prism-shaped first projection 15 is formed at a predetermined position on the outer circumferential surface of the stem portion 12, and the second projection 20 of the drive lever 16 is the first projection. Adjacent to (15).

The drive lever 16 has a mounting portion 17, a driving portion 18 and a connecting portion 19.

The mounting portion 17 is mounted on the mounting member 30 by means of a screw 21, and the drive lever 16 is indicated by an arrow R on the pedestal 22 in the vicinity of the mounting portion 17. Direction can be rotated.

The hole 25 is formed in the connecting portion 19 of the drive lever 16 and the guide shaft 27 of the push button 29 is formed in the hole 25 formed in the mounting member 30 opposite the connecting portion 19. , 31).

In addition, the compression spring 28 is fitted to the guide shaft 27 between the mounting member 30 and the connecting portion 19 and tilts the connecting portion toward the front panel 3 side.

The connecting portion 19, which is tightened by the compression spring 28, is in contact with the push button 29, whereby the flange 29a of the push button 29 is in contact with the inner surface of the front panel 3, and the pressing part 29b protrudes out from the front panel 3.

By this arrangement, the push button 29 is pushed down to the described position against the tilting force of the compression spring 28 by pressing the pusher 29b, and the push button 29 is returned to the original position by the tilting force of the distance when the push is released. To return.

This means that the pushbutton 29 reciprocates in the direction indicated by the arrow p by pressing and releasing and the drive lever 16 rotates in the direction indicated by the arrow R in coordination with it.

The stopper 26 formed by the cutting rise or the like is provided around the hole 31 of the mounting member 30.

Thus, the connecting portion 19 stops at the joint to the stopper 26 at the angle of the drive lever 16 in the direction indicated by the arrow R. FIG.

3 is a cross-sectional view of the knob 11 taken along the line III-III of FIG.

The first protrusion 15 extends radially outward on the outer periphery of the stem portion 12 of the knob 11.

As shown in FIG. 3, the third protrusion 20 of the driving lever 16 is disposed on the first protrusion 15, and the contact surface 15a and the second protrusion 20 of the first protrusion 15 are disposed. The contact surface 20a is in contact with the original position where the knob 11 is not rotated as shown in FIG.

7 is a cross-sectional view of the connecting portion 19 of the drive lever 16 taken along the line IV-IV of FIG.

The hole 25 is formed in a town shape having a long axis in the longitudinal direction of the drive lever 16, and the guide shaft 27 of the push button 29 extends through this hole 25.

This causes the hole 25 to deviate relatively from the guide shaft 27 in the direction of its long axis when the drive lever 1b is angled and rotated in the direction indicated by the arrow R in the pedestal 22.

5 (1) is a simplified side view of the timer (1), Figure 5 (2) is a view showing a mechanism for outputting an electrical signal from the timer body (7) and Figure 6 is a supply of electricity to the motor 32 7 is a diagram showing the knob 11 in operation, and FIG. 8 is a waveform graph showing the electric signal output from the timer main body 7. As shown in FIG.

The timer main body 7 is composed of a motor 23, a reduction gear train 33, one clutch 34, a cam 38, a lever 39, and a pair of contacts 40.

The electric power, that is, the rotational speed of the motor or the like is decelerated by the reduction gear train 33 and is further transmitted to the operation shaft 10 through the one-way clutch 34.

When electricity is supplied to the motor 32 by a commercial AC power supply 36 it rotates at a rotational speed corresponding to the frequency there.

Switching of the supply is executed by the switch 35.

As shown in FIG. 5 (1), in the cam 38, the notch 38a is formed at the original position of the operation shaft 10 and when the timer main body 7 is not operated, that is, the operation shaft 10 The block portion 39a is engaged with the notch 38a at the tip of the lever 39 when is in its original position.

The pair of contacts 4 are provided under the lever 39.

When rotating on the cam 38, the upper electrode plate 40b on which the contact 40a is installed is compressed by the block portion 39a of the lever 39 toward the upper electrode plate 40d on which the contact 40c is installed. do.

That is, when the knob 11 is adjusted to rotate the cam 38 at the angular position required in the direction indicated by the arrow A in the fifth (2) degree, the block portion 39a of the lever 39 is cam It moves away from the notch 38a of 38, and moves to the outer surface 38b thereof.

Thus, the lever 39 compresses the electrode plate 40b, and the contacts 40a and 40c touch each other.

By contact of the pair of contacts 40, an electrical signal begins to be output.

The switch 35 is installed in the vicinity of the flange 13 of the knob 11 fixed to the operation shaft 10 and is connected to the rotation operation of the knob 11.

This means that the switch 35 is OFF in place of the knob 11, for example, when the knob 11 is rotated by the operator in the angular position of the request of FIG. Is turned on and the motor 32 is moved.

As mentioned above, the one-way clutch 34 is located between the reduction gear train 33 and the operation shaft 10, and the rotational power in the rotation adjustment direction is located between the operation shaft 10 in the motor 32 , The rotation power in the reverse direction to the rotation adjustment direction is transmitted from the motor 23 to the operation shaft 10, but the rotation power in the rotation control direction to the reduction gear train 3 is not transmitted to the operation shaft 10.

Thus, when the knob 11 is rotated, the flange 13 turns on the switch 35 to move the motor 32, but during the rotation adjustment of the knob 11, that is, the rotary shaft 10, the motor ( The power of 32 is not transmitted to the operation shaft 10 due to the detachment of the one-way clutch 34.

Thus, when the rotary steering of the knob 11 is completed, the normal cleat 34 transmits power from the motor 32 to the operation shaft 10 and returns the knob 11 in the reverse direction to the rotational steering direction.

When the knob 11 returns to its original position, the flange 13 turns off the switch 35, and the motor 2 cuts off the power source so that the knob 11 no longer rotates.

Also in response to the above switching of the ON / OFF state of the switch 35, the timer main body 7 is an angle produced by the rotation control of the knob 11 while the operating shaft 10 returns in the reverse direction to the rotation control direction. The power signal S1 (Fig. 8) which maintains a high level is output by the contact of the pair of contacts 40 during the period W1 corresponding to the rotation amount in.

Based on this electric signal S1, the microwave oven 2 performs heating cooking for the heating time determined by the period W1.

9 is a diagram for explaining the operation associated with the timer 1 and the gambling button 29. FIG.

As shown in FIG. 1, when the knob 11 is not operated, the pushed button 29 in its original position is connected to the front panel by the compression spring 28 through the connecting portion 19 of the drive lever 16. 3) Tilt towards the side.

Thus, the flange 29a of the push button 29 abuts the inner surface of the front panel 3.

In addition, the knob 11 stops at the original position where the first projection 15 formed on the stem portion 12 is in contact with the second projection 20 of the drive lever 16.

When the calculation time of the timer is set by the push button 29 as shown in Fig. 9 (1), the compression portion 29b is compressed in the direction indicated by the arrow P1.

The push button 29 thus rotates the drive lever 16 in the direction indicated by the arrow R1 toward the biasing force of the compression spring 28.

Then, the connecting portion 1P stops at the position indicated in Fig. 9 (2), which is in contact with the stopper 26.

At this time, the drive lever 16 rotated at an angle in the direction indicated by the arrow R1 has the contact surface 20a of the second projection 20 thereon on the stem portion 12 of the knob 11. It moves in the direction of the axial line of the stem part 12 in the state which contact | connects the contact surface 15a of the 1st protrusion 15 formed.

Therefore, the resistive force of the first protrusion in the moving direction of the ninth (1) or the ninth (2) degree from the contact surface 20a of the second protrusion 20 to the contact surface 15a of the first protrusion 15. Tilt (15) and act.

Accordingly, the knob 11 is rotated by a predetermined angle around the axis in the direction indicated by the arrow R3 by the arrow R3 by the resistance applied on the first protrusion 15, and the seventh ( 2) The operation shown in the figure is executed.

That is, the operating shaft 10 is rotated by pressing the push button 29 without adjusting the rotation of the knob 11 as shown in FIG. 7 (2), and corresponds to the predetermined angle, for example, a short heating time. 1 minute is set.

As shown in FIGS. 9 (2) and 9 (3), the push button 29 contacts the stop lever 26 of the drive lever 16 with the connecting portion 19, and then the push button thereon when the push button is restored. Reference numeral 29 is returned in the direction indicated by the arrow P2 by the biasing force of the compression spring 28 applied through the connecting portion 19.

In response to this, the straight lever 16 also rotates at an angle in the direction indicated by the arrow R2 on the pedestal 22 of the mounting portion 16, and causes the ninth (3) to be displayed.

Accordingly, the second protrusion 20 of the drive lever 16 is separated from the first protrusion 15 of the knob 11, and the knob 11 is moved to the arrow R4 in accordance with the rotation of the operating shaft 10. It is possible to rotate at an angle in the direction indicated by.

Thus, the operation shaft 10 of the timer main body 7 returns by the predetermined angle in the direction indicated by the arrow R4 for a period corresponding to the rotation, and the first protrusion 15 is the second protrusion 20. ) Again.

The operating shaft 10 stops at the timing when the switch 35 described with reference to FIG. 5 is turned off by the flange 13 of the knob 11.

At this time, the timer bodies 7 are paired for a predetermined period of time W2 corresponding to the predetermined angle shown in Fig. 8 (2) while the operating shaft 10 is returned in the reverse direction by the predetermined angle at which the operating shaft 10 is rotated. Outputs an electrical signal at a high level at the contact of the contact.

Based on this electric signal S2, the microwave oven 2 outputs an electric signal whose high level continues by the contact of a pair of contacts for a certain period of time W2.

Based on this electric signal S2, the microwave oven 2 performs heating cooking for a certain period of time W2.

As mentioned above, in this embodiment, the linear movement at the position of the push button 29 in the direction indicated by the arrow P1 is carried out by the knob 11 at an angle in the direction indicated by the arrow R3 of the drive lever 16. Switch to).

Therefore, only by pressing the push button 29, the timer 1 can drive the operation shaft 10 of the timer main body 7 by a predetermined angle in the operation direction.

Therefore, the time setting of the angle corresponding to the predetermined angle can be performed without the cumbersome rotation adjustment of the knob 11 in the all setting, and the operation capability is also improved.

As mentioned above, according to the present invention, only by pressing the push button provided in the timer, the calculation operation of the predetermined period can be executed simply.

Moreover, the control of the timer can be improved.

Also, in conjunction with that of the present invention, the means for driving the operating shaft of the timer main body and the push button to rotate at an angle can be executed in a relatively simple configuration and the manufacturing cost can be greatly reduced.

Claims (5)

A timer body having an actuating shaft capable of rotating and angling its axis at its original position and outputting only a continuous electrical signal for a period of time during which the actuating shaft returns from its desired position to its original position, A timer comprising a knob provided at one end of the operating shaft, a push button that can be pressed to a predetermined distance, and drive means for rotating the operating shaft at its original position by an angle corresponding to the distance at which the push button is pressed. 2. The timer body according to claim 1, wherein the timer main body includes rotation driving means for rotating the operation shaft from the desired position to the original position, a cam provided on the operation shaft, a lever moved by the rotation of the cam, and a movement of the lever. A timer containing a pair of contacts controlled by. 3. The driving shaft according to claim 2, wherein the rotation driving means is connected to the motor and the rotation shaft of the motor to decelerate the rotational speed of the motor and rotates only the reduction gear train and the operation shaft in one direction corresponding to rotation of the motor. And a one-way clutch for connecting the reduction gear drain. 2. The knob according to claim 1, wherein the knob has a stem portion around the outside of which the first projection is set, the stem portion is connected to the actuating shaft, and the driving means is at a distance at which the actuating shaft is placed in the original position and the push button is placed. And a driving lever having a second projection which comes into contact with the first projection when the second projection moves in the axial direction of the corresponding operating shaft, so that the first projection is at a distance pressed from the original position of the push button. A timer that moves around the axis of the operating shaft by a corresponding angle. The timer of claim 1 used in a microwave oven.