JPH06337118A - Microwave oven with heater - Google Patents

Abstract

PURPOSE:To provide an operation mode switching mechanism simply constituted for a microwave oven provided with a heater. CONSTITUTION:A microwave oven provided with a heater is so constituted that a microwave operation mode and a heater operation mode can be selectively switched by manipulation of an operation mode switching means which comprises a rotation operating part 3, a switch actuating part 9 provided unitarily with the rotation operating part 3 and a microswitch 25 for switching the operation mode, which is arranged around the rotation operating part 3 and actuated by the switch actuating part 9 when the rotation operating part 3 is rotatably operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation mode switching mechanism for a microwave oven with a heater.

[0002]

2. Description of the Related Art In a microwave oven with a heater of this kind, an operation mode is switched between a microwave operation mode and a heater operation mode by a single operation section. The switch variable resistance part is operated to switch the operation mode.

[0003]

However, in such a structure, since the link mechanism is used and the switch variable resistance portion is activated in the middle thereof, the structure is complicated and the assembly is troublesome. At the same time, there is a problem that the device cannot be downsized when the mechanism is enlarged and incorporated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an operation mode switching mechanism having a simple structure.

[0005]

According to the present invention, there is provided a microwave oven with a heater configured so that a microwave operation mode and a heater operation mode can be selectively operated by operating an operation mode switching means. The operation means is arranged around the rotation operating part, a switch operating part provided integrally with the rotation operating part, and a drive operated by the switch operating part when the rotation operating part is rotationally operated. It is composed of a micro switch for mode switching.

[0006]

According to the present invention, when the rotary operating portion is rotationally operated, the switch operating portion operates the microswitch to switch the operation mode.

[0007]

1 is a plan view of an operating portion of a microwave oven with a heater according to the present invention, FIG. 2 is an internal view of the operating mode switching operating portion, and FIGS. 3 and 4 are sectional views. The overall configuration of the device is the same as that of a general device, and therefore its explanation is omitted.

On the operation surface 1 shown in FIG. 1, from the upper part, a rotation operation section 3 for switching operation modes for rotating each, a rotation operation section 4 for output switching, and a rotation operation section 5 for setting a timer time are provided. Has been.

As shown in FIGS. 2, 3 and 4, the rotary operation portion 3 has a circular upper surface body 7, a cylindrical portion 8 extending rearward from a central position of its rear surface, and a cylindrical portion on the rear surface. 8 and a switch actuating portion 9 extending rearward from the outer peripheral position. The switch operating portion 9 has a mountain-shaped cross section, a tip end portion thereof serves as an operating end 11, and a positioning groove 12 is formed in the middle portion thereof along the top portion.

On the operation panel 15 forming the operation surface 1,
A recess 16 is formed in which the upper surface body 7 of the rotation operation unit 3 is mounted, and a shaft support 17 of the tubular portion 8 is provided in the inner portion of the recess 16. An actuation guide opening 20 for the switch actuating portion 9 is formed on the outer periphery of the shaft support portion 17 on the substantially upper half side thereof, and the edge portion of the guide opening 20 is located at the upper portion and at both side positions.
A positioning body 23 is provided which projects each of the positioning protrusions 22a and 22b inward. Protrusion 22
a is provided on the back side, and each of the protrusions 22b is located on the front side. Each of 25 is a micro switch, and the actuated portions 25 a are arranged on both sides of the shaft support 17 so as to correspond to the actuating end 11.

The tubular portion 8 of the rotary operation portion 3 is inserted into the shaft support portion 17, and the upper surface body 7 thereof is mounted and attached in the recess 16.

In the state shown in FIGS. 1 and 3, the switch operating portion 9
Is on the upper side, and the two microwave switches 25 are not operated, and in this state, the mode setting is such that the microwave operation and the heater operation are used together. Further, in this state, the positioning protrusion 22a fits into the positioning groove 12 of the switch actuating portion 9, whereby the rotation operation portion 3 is positioned.

When the rotary operation part 3 is rotated to the left, the operating end 11 of the switch operating part 9 pushes the operated part 25a of the left microswitch 25, as shown in FIG. The microwave operation mode is set. In this state, the positioning protrusion 22b fits into the positioning groove 12 of the switch operating portion 9. Further, when rotated rightward, the actuating end 11 of the switch actuating portion 9 causes the microswitch 2 on the right side to move.
5 is pressed, the heater operation mode is set. Even in this state, the other positioning protrusion 22
b is fitted into the positioning groove 12 of the switch operating portion 9.

The above-mentioned positioning protrusions 22a, 22
The fitting operation of b into the positioning groove 12 serves to give the operator an operational feeling in addition to the positioning action.

[0015]

According to the present invention, since the operation mode is switched by the micro switch operation by the switch operation section by the rotation operation of the rotary operation section, the mode switching mechanism is simplified and the assembly is facilitated. As a result, the device can be downsized.

[Brief description of drawings]

FIG. 1 is a plan configuration diagram of an operation unit of a microwave oven with a heater according to the present invention.

FIG. 2 is an internal configuration diagram of a driving mode switching operation unit.

FIG. 3 is a vertical sectional view of an operation mode switching operation unit.

FIG. 4 is a transverse cross-sectional view of an operation mode switching operation unit.

[Explanation of symbols]

 3 Rotation operation part 9 Switch operation part 25 Micro switch

Claims (1)

[Claims] 1. A microwave oven with a heater configured to selectively perform a microwave operation mode and a heater operation mode by operating an operation mode switching means, wherein the operation mode switching means includes a rotation operation section, A switch operating portion integrally provided in the rotation operating portion, and a microswitch disposed around the rotation operating portion and operated by the switch operating portion when the rotation operating portion is rotationally operated, for operating mode switching. A microwave oven with a heater.