JPS5827461Y2 - switch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch device that opens and closes a plurality of switches corresponding to three operating positions of an operating member.

For example, this type of switch device used in a rice cooker with a heat retention function has a switch base provided with multiple switches such as a power switch and a rice cooking and heat retention switch, and an operation lever having a knob on the switch base. is rotatably supported, and when the operating lever is operated to one of three rotating states: power off, warming, and rice cooking, the switch corresponding to each rotating position is activated. A temperature-sensing device is provided at the opposite end of the pan to sense the temperature at the bottom of the pot using the magnetic transformation point of the magnetic shunt material.

However, with this conventional structure, the temperature-sensing device is moved up and down below the pot in response to the three rotational states of the control lever, which has the disadvantage of requiring a large space below the pot. .

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a switch device that can minimize installation space.

An embodiment in which the present invention is applied to a rice cooker will be described below with reference to the drawings.

1 is a substantially cylindrical outer case, 2 is a bottom frame fitted to the lower part of the outer case 1, 3 is an inner case disposed inside the outer case 1 via the decorative frame 4, and 5 is the outer case 1 and A heat insulator disposed between the inner cases 3; 6 a pot detachably disposed within the inner case 3; 7 a sheathed heater curved in an annular shape; 8 an inner lid; 9 an outer lid; is an insulating heater.

11 is a switch device, which will be explained below.

Reference numeral 12 denotes a switch machine frame which is bent into a substantially U-shape and has side plate portions 12 a , 12 a facing each other at a predetermined distance from the left and right, and is formed at one end of the side plate portions 12 a , 12 a . The tongue pieces 12 b and 12 b are fixed to the inner surface of the outer case 1 with screws.

Reference numeral 13 denotes an operating lever as an operating member, in which a tongue portion 13a formed in the intermediate portion is connected to the side plate portion 1 via a shaft pin 14.
It is rotatably supported by the other ends of 2 a and 12 a.

Reference numeral 15 denotes an operating lever as an operating member having a knob 16 attached to one end by integral molding, and a tongue piece 15a formed near the other end is rotatably supported by the shaft pin 14. A knob 16 projects outward from a hole 17a of an operation panel 17 attached to the side surface of the outer case 1.

18 is a microswitch as a first switch fixed to one side plate 12a of the switch frame 12; 19;
is a microswitch as a second switch fixed to the other side plate portion 12a of the switch machine frame 12, and the actuators 18a and 19 of these microswitches 18 and 19 are
Both a are directed downward.

Reference numeral 20 denotes a protruding piece that protrudes downward from one end of the operating lever 13, and the actuator 1 of the microswitch 18 is attached to the lower end of this protruding piece.
A pressing portion 20a corresponding to 8a is formed.

21 is an interlocking piece projecting upward from one end of the operating lever 13; 22 is a spring receiver formed at the other end of the operating lever 15; and 23 is an interlocking piece formed on the operating lever 13 to face the spring receiver 22. The spring receivers 24 are these spring receivers 22.2.
This is a compression coil spring disposed between 3 and 3.

Reference numeral 25 denotes a protruding piece that protrudes downward from one end of the operating lever 15, and the actuator 1 of the micro switch 19 is attached to the lower end of this protruding piece.
A pressing portion 25a corresponding to 9a is formed.

Reference numeral 26 denotes a leaf spring bent into a substantially U-shape, and has protruding convex portions 26 a and 26 at both ends thereof that protrude inwardly from each other.
a are formed, and these raised protrusions 26 a, 2
6a is the hole 1 drilled in the upper part of the side plate parts 12a, 12a.
Fits into 2C and 12C.

Now, 27 is a temperature sensing device, which will be explained in detail below.

Reference numeral 28 denotes a bottomed container-shaped protection tube made of aluminum, and a magnetic material 29 made of a magnetic shunt material is adhered to the inner surface.

The protective tube 28 is inserted from below into a through hole 3b bored in the center of a bulge 3a formed on the inner bottom surface of the inner case 3, and is inserted into a support fixed to the bottom surface of the inner case 3. It is always urged upward by a compression coil spring 31 disposed between the plate 30 and the spring receiving portion 28a of the protective tube 28.

Further, the spring receiving portion 28a of the protective tube 28 is formed to have a larger diameter than the through hole 3b, so that when the pot 6 is removed, the protective tube 28
This prevents it from being removed upwards.

Reference numeral 32 denotes an actuating rod that is vertically movably supported in a hole 30 a of the support plate 30 , and a permanent magnet 34 covered by a cover 33 is fixed to the upper end of this rod by a stop ring 35 .

Reference numeral 36 denotes a connecting body fixed to the lower end of the actuating rod 32 via a stop ring 37, and the other end of the actuating lever 13 is connected to a fitting groove 36a formed on the outer periphery of this connecting body.

A compression coil spring 38 is arranged between the support plate 30 and the actuation lever 13 so as to be wound around the actuation rod 32.

Now, in the electric circuit diagram of FIG. 4, 38 and 39 are power supply terminals, 40 and 41 are neon lamps, and 42 and 43 are current limiting resistors.

Next, the operation of this embodiment configured as above will be explained.

Pull up the knob 16 to the highest position and release the operating lever 15.
When the lever is positioned at the first operating position A shown by the two-dot chain line in FIG. When the pressing portion 25a presses the actuator 19a, the microswitch 19 is brought into an open state.

In addition, in this state, the actuating lever 13 is moved by the compression coil spring 24.
The actuator 18a is biased in the direction of the arrow a, so that the actuator 18a is positioned at the first rotation position X shown by the two-dot chain line in FIG. The microswitch 18 also assumes an open state.

Next, when the knob 16 is pushed down one step from the uppermost position to position the operating lever 15 in the second operating position B shown by the two-dot chain line in FIG.
a, 26a, and the lower surface of the operating lever 15 is brought into contact with the upper end of the interlocking piece 21, and the pressing part 25a of the protruding piece 25 is pressed against the actuator 1.
9a, and the microswitch 19 becomes closed.

In this state, the operating lever 13 is located at the first rotational position X, and the microswitch 18 is in an open state.

Now, when the knob 16 is pushed down one more step from the second rotational position B and the operating lever 15 is rotated to the third operating position C shown by the solid line in FIG.
1 in the opposite direction of arrow a, the actuating rod 32 is moved upward, and the permanent magnet 34 is moved toward the magnetic body 2.
9 is adsorbed and held.

That is, the operating lever 13 is positioned at the 20th rotation position Y shown by the solid line in FIG.
a, and the microswitch 18 is closed.

Now, when rice and water are put into the pot 6 and the operating lever 15 is rotated to the third rotational position C as described above, the operating lever 13 is positioned to the second rotational position Y and the micro switch 1
8 and 1 are closed, the sheathed heater 7 is energized and rice is cooked.

At this time, the neon lamp 41 lights up at the same time. When the rice in the pot 6 is heated by the seed heater 7 for a predetermined period of time and all the water in the pot 6 is absorbed by the rice, the rice becomes dry.
The temperature of the bottom of the pot 6 begins to rise rapidly.

On the other hand, since the magnetic body 29 is pressure-welded to the pot 6 via the protective tube 28, its temperature increases following the temperature of the pot 6, and when the temperature at the bottom of the pot 6 reaches a predetermined temperature, the magnetic body 29 undergoes magnetic transformation. It reaches a point and becomes non-magnetic.

Then, since the attractive force acting between the magnetic body 29 and the permanent magnet 34 becomes lower than the spring force of the compression coil spring 38, the actuating rod 32 is displaced downward by the spring force of the compression coil spring 38. , the operating lever 13 is returned to the first rotational position X.

At the same time, the operating lever 15 is pushed up by the interlocking piece 21 to be rotated to the second rotation position B.

Therefore, in this state, as described above, the microswitch 19 remains closed and the microswitch 18 is opened, so that power is supplied to the series circuit of the insulating heater 10 and the sheathed heater tube, and at the same time, the pilot lamp 41 is turned off and the pilot lamp is turned off instead. Lamp 40 lights up.

In this case, since the insulation heater 10 has a high resistance, the current to the sheathed heater 7 is sufficiently restricted, and the amount of heat generated by the sheathed heater 7 is sufficiently reduced compared to when cooking rice. The pot 6 is kept warm.

If the operating lever 15 is rotated from the second rotational position B to the first rotational position A at an appropriate time after the rice is cooked, the microswitch 19 is opened and the warming is completed.

As described above, according to this embodiment, the operating stroke can be made smaller than in the conventional structure by simply moving the operating lever 13 between the first rotational position X and the second rotational position Y.

Since the microswitch 18 is configured to close when the pressure of the actuator 18a is released, dimensional errors in the actuating rod 32 can be easily absorbed, and the opening and closing operations can be performed reliably.

Further, when the operating lever 13 is located at the second rotational position Y, no spring force or the like acts on the operating lever 15.
Therefore, no load other than the compression coil spring 38 acts on the actuating rod 13, and the operating temperature of the temperature sensing device becomes extremely accurate.

As is clear from the above description, the present invention has three operating members.
When the operating member is moved between two operating positions, the operating member is moved in conjunction with the operating member, and when the operating member is moved to the remaining operating position, the operating member and the operating member are linked. Since this is released, the movement stroke of the actuating member is small, and the installation space can also be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a rice cooker; FIG. 1 is a longitudinal sectional view, FIG. The diagram along the line, FIG. 4, is an electrical circuit diagram. In the drawing, 6 is a pot, 7 is a sheathed heater, 10 is a heat-retaining heater, 11 is a switch device, and 13 is an operating lever (operating member).
, 15 is an operation lever (operation member), 18 is a microswitch (first switch), 19 is a microswitch (second switch), 27 is a temperature sensing device, 29 is a magnetic material, 34
is a permanent magnet.

Claims (1)

[Claims for Utility Model Registration] 1. An actuating member that senses temperature, etc. and moves between two positions, and has three operating positions, and is linked to the operating member when moving between two of the operating positions. an operating member that is disconnected from the operating member when the operating member is moved to the remaining one operating position; and a plurality of operating members that are opened and closed in accordance with the three operating positions of the operating member. A switch device comprising a switch. 2. The switch includes a first switch that is opened and closed by movement of the actuating member, one operating position in which the operating member is not linked to the actuating member among three operating positions, and the remaining two operating positions.
2. The switch device according to claim 1, wherein the switch device comprises a second switch that is opened and closed based on movement between two operating positions. 3 Utility model registration claim 2, characterized in that the first switch and the second switch are disposed in a positional relationship opposite to the switch base frame that supports the operating member and the operating member.
Switching device as described in Section.