JPS60154427A - Power source switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a power switch for an electric cooking device such as a toaster oven.

Conventional structure and its problems Conventionally, when toasting is performed in a toaster oven, etc., especially when toasting is performed continuously, heat is lost to the toaster oven casing during the first toasting. Therefore, it was necessary to set the toast roasting time to a long time, and from the second time onwards, the toast roasting time was set to a short time since the toaster oven casing was in a heated state, so that the toast color could be kept constant.

To this end, a circuit has been proposed that allows the roasting time to be adjusted depending on the heating state of the housing.

However, in this case, as shown in FIG. 3, the power switch is connected to the lifting operation part 2, to a locking part that locks the lifting operation part 2, and to a contact that turns on the power when the lifting operation part 2 is locked. A part S, a flit magnet 14 that releases the lock from the locking part after a predetermined period of time and turns off the power to complete roasting, and a circuit part C, and each of these is separately provided. It was designed to be attached to a board, etc. As a result, it takes time and effort to install each element, and furthermore, the electromagnet 14. Contact part S
.

It is necessary to connect the circuit section C etc. with lead wires, L2, L, etc., which is complicated and expensive.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks of the prior art and to make the switch construction extremely simple and advantageous in terms of cost.

Structure of the Invention In order to achieve the above object, the present invention includes an operating section, a locking section, a contact section, and a circuit section mounted on a single printed circuit board, and the electrical connection between each of the above-mentioned elements is made by using a lead wire. This can be accomplished by conventional industrial means such as unused printed circuit boards and dipping them into a soldering tank.

That is, when a permanent magnet provided on an operating section rotatably supported on a board and biased by a spring is attracted to an iron core of an electromagnet provided on the board, the contact section is moved by the action of the operating section. The circuit provided on the board operates the electromagnet in a direction that cancels the magnetic force of the permanent magnet, opens the permanent magnet, and opens the contact to turn off the 'tE source. Roasting is completed by turning it off. According to the above configuration, a series of switches for starting toast roasting and completing the toast roasting after a predetermined period of time can be mounted on a single printed circuit board, and connections between each element can be made by connecting the printed circuit board to a soldering bath. This can be easily done by conventional industrial means such as dipping, which simplifies the processing process and provides an extremely cost-effective switch configuration.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the attached notes.

In FIGS. 1 and 2, a rotation shaft portion 3 provided on an operating portion 2 is rotatably supported by a rotation support portion 1 provided on a printed circuit board P by the action of a spring 4. 2 is provided with a magnetic pole plate 6, a permanent magnet 6, and a contact portion 7. It's 1.
A fixed part 11 of a movable piece 10 that brings a movable contact 8 into contact with a fixed contact 9 by the action of the contact part 7 as a contact part S is fixed to a printed circuit board P, and the fixed part 12 having the fixed contact 9 is also printed. It is fixed to the substrate P. Also, iron core 1
A variable resistor 16 is also connected to the printed circuit board. It is located on P.

In the above configuration, when the operating portion 2 is operated against the spring 4, the permanent magnet 6 approaches the iron core 13, and the magnetic pole plate 6 and the iron core 13 are attracted and held by the action of the permanent magnet 6.

At this time, the contact portion 7 acts on the movable piece 10 against the spring force of the movable piece 10, and the movable contact 8 and the fixed contact 9 come into contact to turn the contact portion S into an ON state (FIG. 1).

Next, when a predetermined period of time has elapsed, the electromagnet 14 generates a magnetic force in a direction that cancels the adsorption effect of the permanent magnet 6 on the iron core 13 due to the action of the circuit section C, so that the action of the spring 4 causes the magnetic pole plate 6 and the iron core to 13 is separated and the contact portion S is turned off (see Fig. 2).

Effects of the Invention As detailed above, the power switch according to the present invention includes a series of components that control the switch function, that is, an operating section, a contact section, an electromagnet, and a circuit section, which are arranged on a single printed circuit board. Since all the electrical connections of the components are made on the printed circuit board, the increase in cost due to the complexity of assembly work is eliminated, making it possible to provide a switch that is extremely cost-effective. .

[Brief explanation of drawings]

FIG. 1 is a plan view showing an on state of a power switch in an embodiment of the present invention, FIG. 2 is a plan view showing the same switch in an off state, and FIG. 3 is a plan view of a conventional power switch. 2...Operation section, S...Contact section, 14.
...[Magnet, C...Circuit section, P...
··Printed board. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3

Claims (1)

[Claims] An operating section, a contact section that turns on and off in connection with this operating section, an electromagnet that is excited when this contact section is turned on or off, and a circuit section that drives this electromagnet are mounted and connected on a printed circuit board. Power switch.