JPH0633284Y2 - Microwave with heater cooking function - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention has a heater cooking function with a damper that closes the vent of the heating chamber when cooking with a heater and opens the vent of the heating chamber when cooking with microwaves. It is about the microwave oven.

<Prior Art> FIG. 4 is a schematic horizontal sectional view of a microwave oven with a heater cooking function, wherein 1 is a heating chamber built in the microwave oven main body 2,
3 is a heater unit arranged on the back wall of the heating chamber 1, 4 is a ventilation hole provided on the side wall of the heating chamber, 5 is attached to the side wall of the heating chamber, and the heat of the heating chamber 1 when the heater is cooked is stored as electrical components. A heat shield plate 7 for blocking transmission to the chamber 6, air-cools electric components such as a magnetron 8 and a high-voltage transformer (not shown), and vents the heating chamber 1 through the vent port 4 during microwave cooking. This is an air blower that air-cools the outer wall surface of the heating chamber 1 during heater cooking. Reference numeral 9 denotes a ventilation duct fixed to the heat shield plate 5 and provided with a damper 11 that closes a vent 10 to the heating chamber 1 during heater cooking and opens the vent 10 to the heating chamber 1 during microwave cooking. . The ventilation duct 9 has a motor 12 and a cam body 13 for opening and closing a damper 11 as shown in FIG.
And damper device components such as the open / close detection microswitch 14 are attached.

<Problems to be Solved by the Invention> In the above-described conventional microwave oven, since the ventilation duct 9 having a relatively thick plate and a large shape is adopted for incorporating the damper device components such as the motor 12, There is a problem that the cost of parts is high and the assembling property of the motor 12, the cam body 13, the open / close detection switch 14 and the like is poor.

<Means for Solving Problems> The present invention includes a damper 15 rotatably supported directly on a heat shield plate 5 arranged in the vicinity of a vent 4, and a motor 12 attached to the damper 15. , A cam body 13 attached to the rotary shaft of the motor 12.
And an action pin 13a provided on the cam body 13 at a position deviated from the rotation center of the cam body 13, and a cut-and-raised piece 5c of the heat shield plate 5.
The action of the cam body 13 is provided in order to apply the rotation force of the motor 12 to the damper 15 as a rotation force in the opening / closing direction by contacting the end face of the action pin 13a with the rotation of the cam body 13. A damper device is configured with the engagement hole 5d into which the pin 13a is inserted and engaged.

<Operation> Since the motor is mounted on the damper with a relatively small shape, it is easy to assemble.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

1 (a) and 1 (b) are a partially cutaway top view, front view, and second view of a heat shield plate integrally incorporating a damper device of the microwave oven of the present invention.
The figure is a perspective view of the damper device, and FIGS. 3 (a) and 3 (b) are front views showing the damper open / closed state of the damper device.

Note that the same or corresponding portions as those in the conventional example will be described by attaching the same reference numerals.

Reference numeral 15 denotes a damper pivotally supported by a shaft 16 on the cut-and-raised pieces 5a, 5b of the heat shield plate 5 formed by bending a thin plate in an angle shape. The motor 12 is mounted on the inner surface of the side wall 15a on the front side in FIG. They are worn and can rotate together. The rotation shaft of the motor 12 penetrates the hole 15b of the side wall 15a and the cam body 13 is attached to the tip end thereof, and the action pin 13a of the cam body 13 cuts and raises the heat shield plate 5c.
It is inserted into and engaged with an engagement hole 5d provided in the. Also, cam body
The damper open / close detection micro switch 14 whose knob is pressed by the large diameter portion 13b of 13 is attached to the outer surface of the side wall 15a by screwing.

Next, the operation of the damper device will be described. First, when the motor 12 is driven in the damper open state shown in FIG. 3 (a) in the microwave cooking state, the action pin 13a slides on the end surface of the engagement hole 5d by the counterclockwise rotation of the cam body 13. The damper 15 is actuated to apply counterclockwise turning force to the damper 15 to close it as shown in FIG. 3 (b). In the process, the micro switch 14 is switched from the ON state to the OFF state, and the motor 12 is stopped and the damper 15 is held in the closed state for a predetermined time after being switched to the OFF state to be in the heater cooking state.

Next, when the motor 12 is driven in this state, the action pin 13a slides on the end surface of the engagement hole 5d by the counterclockwise rotation of the cam body 13 to give a clockwise turning force to the damper 15 Figure 3
The damper 15 is opened as shown in (a). In the process, the microwave switch 14 is switched from the OFF state to the ON state, and the motor 12 is stopped a predetermined time after switching to the ON state, and the damper 15 is held in the open state to be in the microwave cooking state.

In the above damper device, the damper 15 is used as the thin shield plate 5.
Since it is directly incorporated into the air conditioner, the ventilation duct 9 in the conventional example becomes unnecessary, and the cost of parts can be reduced. Since the motor 12, the cam body 13, and the open / close detection micro switch 14 are assembled on the basis of the damper 15, the assembling property is very easy. (If the motor 12, the cam body 13 and the switch 14 are assembled to the cut-and-raised piece 5c, the shield plate 5 has a large shape, so that the assembling property is poor.
Is weak, so there is also a mechanical problem. ) <Effect> Since the microwave oven with the heater cooking function of the present invention has the above-mentioned configuration, the damper can be directly incorporated into the heat shield plate, the conventional ventilation duct is not required, and the damper is mainly used. Since the motor, the cam body, and the like are assembled, the assembly accuracy is very accurate and the assembly can be done easily.

Further, since the engaging hole is provided in the cut-and-raised piece of the heat shield plate and the pivot member is integrally formed with the heat shield plate, it is not necessary to separately provide an angle for attaching the pivot member or the like, which is simple. It can be configured in various ways.

[Brief description of drawings]

1 (a) and 1 (b) are a partially cutaway top view, front view, and second view of a heat shield plate integrally incorporating a damper device of the microwave oven of the present invention.
The figure is a three-dimensional perspective view of the damper device, FIGS. 3 (a) and 3 (b) are front views showing the damper device in the opened and closed states, FIG. 4 is a schematic horizontal sectional view of the microwave oven, and FIG. It is a three-dimensional view showing a conventional damper device. Reference numeral 1: heating chamber, 4: vent hole, 5: heat shield plate, 5c: cut and raised piece, 5d: engaging hole, 12: motor, 13: cam body, 13a: action pin, 15: damper.

Claims (1)

[Scope of utility model registration request] 1. A microwave oven with a heater cooking function, comprising: a damper device for closing a ventilation port to a heating chamber during heater cooking and opening the ventilation port to a heating chamber during microwave cooking; A damper rotatably supported directly on a heat shield plate disposed in the vicinity of the ventilation port, a motor attached to the damper, a cam body attached to a rotation shaft of the motor, and a cam body attached to the cam body. The action pin provided at a position deviated from the rotation center of the cam body and the action pin provided on the cut-and-raised piece of the heat shield plate come into contact with the end face as the cam body rotates and the action pin of the motor is A pivot member for pivotally supporting the damper is formed integrally with the heat shield plate by an engaging hole into which the action pin of the cam body is inserted and engaged in order to apply a rotational force to the damper as a rotational force in the opening / closing direction. Characteristically molded Microwave oven with data cooking function.