JPH023049Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a high-frequency heating device, such as a microwave oven.

[Technical background of the invention and its problems] For example, on the front side of a microwave oven, a door body for opening and closing an opening of a heating chamber is pivotally mounted, and an operation panel is provided alongside this door body. In order to reliably close the opening to prevent radio wave leakage during high-frequency heating, the above door body has a spring-loaded hook protruding from the side of the door body, and this hook is attached to a lock part provided on the main body of the device. They are starting to interact.

In this type of structure, when the door body is opened, that is, when the door is opened, the hook must be moved away from the lock portion against the elastic force of the spring.

Conventionally, the handle provided on the door body has a two-piece structure, and the handle on the back side is rotatable and connected to an arm mechanism. If you grasp the handle when opening the door, you will also grasp the handle on the back side at the same time, which will rotate. Then, the arm mechanism can pull out the hook from the lock portion against the elastic force of the spring.

However, since the direction in which the arm is biased and the direction in which the hook is pulled out are different from each other, the mechanism is complicated, the assembly is troublesome, and the failure rate is high.

Therefore, recently, a mechanism has been used in which an opening button is provided on the operation panel of the main body of the device, and the hook can be pulled out from the lock by pressing the opening button. According to this type of structure, in particular, the hook mechanism on the door body side can be simplified, assembly is facilitated, and the door can be opened reliably, resulting in improved reliability.

However, the door opening button directly contacts the hook and requires a large force to overcome the elastic force of the spring, which poses a problem in terms of operability.

Further, the operation of the heating button for operating the heating switch is almost the same, and the mechanism between these is complicated and the operating force is heavy, and the response is poor due to a certain time difference.

[Purpose of the invention] The present invention was made with attention to the above circumstances, and its purpose is to provide a door opening and heating operation that is reliable with light operating force and that has quick operation response. The present invention aims to provide a high frequency heating device.

[Summary of the invention] The invention provides a movable slider equipped with a compression spring and an auxiliary slider for turning on and off a heating switch in the lock part of the device body, on which the door hook can be freely hooked and removed, and when the door is in the closed state. The heating arm is hooked to the auxiliary slider to regulate this displacement, thereby accumulating elastic repulsive force in the compression spring, and when the heating button is pressed, the heating arm is displaced to release the position restriction of the auxiliary slider. The heating switch is turned on instantaneously by sliding the auxiliary slider using the elastic repulsion force of the compression spring, and when the door opening button is pressed, the slider itself is displaced by the door opening arm, and this biasing force and the elasticity of the compression spring are The repulsive force causes the hook to separate from the lock part.

[Embodiment of the invention] Hereinafter, an embodiment of the invention will be described based on the drawings. FIG. 1 shows a microwave oven which is a high frequency heating device, and 1 is the main body of the device. A door body 2 for opening and closing an opening of a heating chamber (not shown) is pivotally attached to the front side of the apparatus main body 1. The door body 2 is always elastically biased in the direction of opening the opening. An operation panel 3 is provided at this side portion. The door body 2 is attached to and detached from the apparatus main body 1 as described later. The operation panel 3 is provided with a heating time setting knob 4, a door opening button 5, and a heating button 6.

A hook 7 as shown in FIG. 2 projects from the side surface of the door body 2, and is elastically urged by a tension spring (not shown) to rotate downward in the figure. A lock portion 8 is provided within the side wall surface of the heating chamber of the apparatus main body 1 facing the hook 7. The lock portion 8 includes an opening 9 into which the hook 7 is inserted and removed, and a slider housing cylinder portion 10 provided along the vertical direction at the end of the opening 9. The slider accommodating cylindrical portion 10 has a slider 1
1 is housed in a vertically movable manner. That is, as shown in FIGS. 2 and 3, the upper end head portion 11a and the center step portion 11b of the slider 11 have the same diameter,
The lower end leg part 11c is slidably fitted into the housing cylinder part 10, and the lower end leg part 11c is connected to the lower end through-hole part 10 of the housing cylinder part 10.
Slideably fit into a. Also, slider 1
A compression spring 12 is wound between the upper end head portion 11a and the center step portion 11b, and an auxiliary slider 13 is slidably fitted therein. That is, the compression spring 12 is interposed between the upper end head portion 11a and the auxiliary slider 13, and the auxiliary slider 13 is interposed between the compression spring 12 and the central step portion 11b. A portion of the auxiliary slider 13 protrudes from a guide elongated hole 14 provided in the accommodating cylinder portion 10, and a tension spring 15 that tensions and biases the auxiliary slider 13 downward is provided in the protruding portion 13a. Further, a heating switch 16 is disposed opposite the protruding portion of the auxiliary slider 13. This heating switch 16 is electrically connected to the high frequency generator of the heating chamber.
Further, on one side of the auxiliary slider 13, a regulating protrusion 13b protruding from the accommodating cylinder portion 10 is provided. This regulating protrusion 13b is shown in FIGS. 3 and 4.
As shown in the figure, the heating arm 18 is rotatably supported by a pivot pin 17, and is detachable from a receiving portion 18a provided at one end thereof. Further, a tension spring 19 is tensioned on the heating arm 18, and the other end of the tension spring 19 always comes into elastic contact with the back side of the heating button 6. As a result, when the heating button 6 is pressed, it rotates and urges the heating arm 18 to rotate against the elastic force of the tension spring 19, and thus the receiving part 18a
is separated from the regulating protrusion 13b of the auxiliary slider 13. Note that a tongue piece 20 protruding from the accommodating cylinder part 10 is provided on the center step part 11b of the slider 11. This tongue piece 20 is
The door opening arm 21 shown in FIGS. 3 and 5 is movable toward and away from the door. That is, this door opening arm 21
is rotatably supported approximately at the center by a pivot pin 22, and one end is elastically rotated in a direction away from the tongue piece 20 by a torsion spring 23 wound around the pivot pin 22. dynamically energized. Door opening arm 21
The other end is elastically biased to come into contact with the back side of the door opening button 5. From this, open door button 5
By pressing , the door-opening arm 21 can be rotated against the elastic force of the torsion spring 23 , and one end of the door-opening arm 21 comes into contact with the tongue piece 20 so that the slider 11 can be forcibly pushed up. There is.

The door opening button 5 and the heating button 6 are configured as shown in FIG. 6, and are rotatably supported on the same axis of a shaft holder 24 provided on the main body 1 of the apparatus. Since these buttons 5 and 6 protrude from the operation panel 3, synthetic resin material is selected in consideration of aesthetic appearance. However, since the slider 11 is made of a metal material, the metal material of the door opening arm 21 is selected in consideration of strength. A reinforcing plate 25 made of a metal material is overlapped and pivotally supported on the back side of the door opening button 5, and is rotatable together with the door opening button 5, and receives the end of the door opening arm 21. It's becoming like that.

Further, on the outer surface side of the door body 2, as shown in FIG.
is attached. This outer barrier 27 is made of a transparent synthetic resin material, and is attached to the door body 2 by decorative clips 29, which are fixing members, that are inserted into counterbore holes 28, which are mounting holes provided at the four corners, as shown in FIG. It is fixed. The decorative clips 29 are on substantially the same surface as the outer barrier 27, so that the decorative clips 29 will not get caught during cleaning. Further, on the back side of the outer barrier 27 that is in contact with the door body 2, a printed surface 27a, which is a frame-shaped shielding surface, is provided along the peripheral edge. This printed surface 27a must be of the same color as the head of the decorative clip 29, and is not limited to solid printing, and may be patterned with letters, lines, etc. Since the non-printed surface of the outer barrier 27 coincides with the opening surface of the heating chamber, the heating chamber is easily visible.

Therefore, in order to close the door body 2 in the open state, the door body 2 is urged to rotate by placing a hand on the decorative protrusion 26. As shown in FIG.
Once it comes into contact with the lower end of the opening 9, it further slides against the elastic force of the tension spring, and its tip is inserted into the opening 9. Then, the slider 1 inside the housing cylinder part 10
1 makes contact with the upper end head 11a and pushes it down.
This biasing force is applied to the auxiliary slider 13 via the compression spring 12, and elastically pushes it down. However, at this time, naturally, the heating button 6 is not pressed, and the heating arm 18 remains biased by the tension spring 19, as shown in FIG. Therefore, the regulating protrusion 13b of the auxiliary slider 13 comes into contact with the receiving portion 18a of the heating arm 18, and the downward displacement of the auxiliary slider 13 is regulated. Furthermore, the push-down force that is the elastic force of the hook 7 continues to be applied, and the slider 11 is pushed down as it is, so the distance between the upper end head 11a and the auxiliary slider 13 is reduced, and the compression spring 12 Elastic repulsive force is accumulated.
The slider 11 is pushed down until the tongue piece 20 of the central step portion 11b comes into contact with the door opening arm 21.
In this way, the door body 2 closes the opening and reliably engages the locking part 8.

In order to obtain a heating effect, the heating time setting knob 4 is set to a predetermined heating time, and the heating button 6 is pressed. Then, the heating arm 18 receives the urging force of the heating button 6.
rotates counterclockwise against the elastic force of the tension spring 19, and this receiving portion 18a is connected to the regulating protrusion 13b.
The auxiliary slider 13 is once pushed up via the auxiliary slider 13 and then released. The auxiliary slider 13 whose restrictions have been lifted is
In response to the accumulated elastic repulsive force of the compression spring 12, the protrusion 13a moves downward instantaneously and pushes the heating switch 16. That is, when the heating button 6 is pressed, the switch is immediately turned on and a high frequency heating effect is obtained.
When the pressing force on the heating button 6 is removed, the tension spring 19
The heating arm 18 rotates clockwise due to the elastic repulsive force of
b. The auxiliary slider 13 has a compression spring 1
2. The heating switch 16 is reliably kept in the on state by the elastic force of the tension spring 15 and the heating arm 18.

After heating and cooking, the door opening button 5 can be pressed to open the door body 2. The door opening arm 21 is pressed against this door opening button 5 via the reinforcing plate 25, and the fifth
As shown in the figure, it rotates counterclockwise against the elastic force of the torsion spring 23. One end of the door opening arm 21 comes into contact with the tongue piece 20 and pushes up the slider 11. Since the center step portion 11b contacts the auxiliary slider 13 and pushes it up, the protrusion 13a moves away from the heating switch 16 and the distance between the auxiliary slider 13 and the upper head 11a decreases again. Therefore, the biasing force of the slider 11 and the elastic repulsive force of the compression spring 12 are applied to the hook 7, and when this elastic pressing force is exceeded, the housing cylinder portion 1
It is extracted from 0 and the engagement is removed. An elastic repulsion force is applied to the door body 2 in the opening direction, and the hook 7
Extract from. The door body 2 rotates to open the opening of the heating chamber. Note that if the pressing force on the door opening button 5 is removed, the torsion spring 2 is attached to the door opening arm 21.
The elastic repulsion force 3 acts to rotate the door opening button 5 in the clockwise direction, and the door opening button 5 rotates until it returns to its original state. At this time, the end of the door-opening arm 21 remains in contact with the reinforcing plate 25, but since it is made of metal, the movement is smooth. Note that while the slider 11 is rising, the regulating protrusion 13b of the reinforcing slider 13 pushes up the heating arm 18 and climbs over it. Therefore, the heating arm 18 is rotated by the elastic force of the tension spring 19, and is again on standby at a position where the displacement of the regulating protrusion 13b can be regulated.

"Effects of the invention" As explained above, according to the invention, by effectively utilizing compression springs, etc., opening the door and starting the heating operation can be done with a light operating force, and the operation response is quickened to improve operability. It has effects such as obtaining.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view of the high-frequency heating device, Fig. 2 is a longitudinal cross-sectional view of the main part of the device, Fig. 3 is an exploded perspective view thereof, and Fig. 4 is a front view of the high-frequency heating device. FIG. 5 is a side view of a portion different from FIG. 4, FIG. 6 is an exploded perspective view of another portion, and FIG. 7 is a partial vertical sectional view of the door body. 2... Door body, 6... Heating button, 5... Door opening button, 1
... Device main body, 7 ... Hook, 8 ... Lock section,
11a...(upper end) head, 11b...center step,
11...Slider, 12...Compression spring, 16...
Heating switch, 13... Auxiliary slider, 18...
Heating arm, 21...Arm for opening the door.

Claims (1)

[Scope of utility model registration request] In a high-frequency heating device, the door body is pivotally attached to the opening of the heating chamber so as to be openable and closable, and the device body has a push-button heating button and a door opening button. a hook that is biased by the user; a lock provided on the device body that causes the door to be in a closed state when the hook is elastically engaged with the device; and a lock that is displaceable when the hook is detached from the device to open the door; and a slider integrally having a head with which the hook abuts and a central step separated from the head, and a slider that is displaceably fitted between the head and the central step of the slider to turn the heating switch on and off. A compression spring is wound around the auxiliary slider and the slider portion between the auxiliary slider and the head, and when the door is in the closed state, the compression spring is hooked to the auxiliary slider to regulate its position, and the head of the slider is The distance between the head and the auxiliary slider is compressed elastically by the hook, and the compression spring accumulates an elastic repulsion force. When the heated button is pressed, the compression spring is displaced and separated from the auxiliary slider. a heating arm that applies an elastic repulsion force to the auxiliary slider to instantaneously turn on the heating switch; and a heating arm that presses the door opening button to displace and urge the slider to slide, and this slide urging force and the compression A high-frequency heating device characterized by comprising a door-opening arm that urges the hook to leave the lock portion against the elastic force of the hook using the elastic repulsion force of the spring.