JPS6144092Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention This invention relates to a door opening/closing mechanism for a high-frequency heating device, and particularly relates to an improvement of a door opening/closing mechanism that uses a hook and a latch to lock the door body.

Technical background of the invention The door opening/closing mechanism used in microwave ovens has traditionally employed a combination of a hook that rotates in conjunction with the handle and a fixed latch, which can be freely engaged and disengaged from the latch by rotating the hook. The door locks the door body by engaging with the door body. Specifically, as shown in Fig. 1, the structure around the hook is such that a handle b is rotatably attached to the surface side of a door body a that opens and closes the heating chamber opening of the microwave oven.
A movement structure is adopted in which a transmission part c is formed on the base side of the handle b, and the transmission part c of the handle b is locked to a hook d provided on the back side of the door body a, and the rotation from the handle b to the hook d is The latch is engaged and disengaged through motion.

Problems with the Background Art However, with the door opening/closing mechanism using the movable handle b as described above, the handle b is forced to protrude from the surface of the door body a, resulting in an unsightly appearance and There is a drawback that the handle b becomes an obstacle when cleaning the body a, making it difficult to clean. Also, hook d is linked to handle b.
Since the structure is complicated, a large proportion of the operating mechanism occupies the door a, and a portion of the operating mechanism penetrates into the chiyoke structure e provided in the door a, causing radio wave leakage and door a. There is also the problem of poor visibility through the viewing window f provided in the window. In other words, the penetrating part of the door body a required for installing the handle b will invade the chiyoke structure e, and the steam entering the inside of the door body a will pass through the outer barrier g that constitutes the viewing window f.
There is a concern that this may cause cloudiness, increase the radio wave leakage value, or even cause radio wave leakage to occur around the handle b.

Purpose of the invention The object of this invention is to provide a door opening/closing mechanism for a high-frequency heating device that has a simple structure, improves cleaning performance, prevents radio wave leakage, and furthermore prevents the viewing window from fogging up.

Summary of the invention A rotatable hook is provided on the back side of the door body, a substantially L-shaped latch is provided on the heating device main body side so as to be rotatable along the protruding direction of the hook, and the hook of the latch is In addition to providing a stopper that restricts the rotation of the protruding side and sets it in the engaged position, by providing a biasing means that biases the latch toward the side that is restricted by the stopper, there is no need to use an operating member such as a handle. To enable the door to be opened and closed by the movement of the door itself.

Embodiment of the invention FIG. 2 shows an embodiment of the invention, in which numeral 1 indicates a heating device main body (hereinafter referred to as the main body) of a microwave oven, which is a high-frequency heating device. A heating chamber 2 is disposed within the main body 1 with its opening facing the front side. Furthermore, a high-frequency oscillation device (not shown) that oscillates high-frequency microwaves into the heating chamber 2 is disposed within the main body 1 . Further, on the front side of the main body 1, an operation panel 3 is provided on the right side adjacent to the opening of the heating chamber 2, and various operation sections 3a... are provided. By controlling the heating chamber 2, it is possible to perform high-frequency heating cooking of foods such as food (not shown) stored in the heating chamber 2 as desired. Further, on the front side of the main body 1, a door body 4 equipped with a side-opening viewing window 4a for opening and closing the opening of the heating chamber 2 is rotatably mounted. A door opening/closing mechanism 5 is provided on the free side of the door body 4 and on the main body 1 side opposite to the free side of the door body 4. The structure of this door opening/closing mechanism 5 is the third
As shown in FIG. That is, as for the structure of the door opening/closing mechanism 5 on the door body 4 side, on the free back side of the door body 7 provided with the chiyoke structure 6, there is an engaging claw at the tip adjacent to the chiyoke structure 6 provided on the door body 7. The hook 8 is provided with a hook 8a that is rotatable in the vertical direction. Note that 9 is a spring for returning the hook 8, and 10 is a stopper for regulating the hook 8 to a horizontal position. A hook insertion opening 11 is provided in the front wall of the heating chamber 2, facing the engaging claw 8a of the hook 8 that protrudes from the back surface of the door body 4. On the other hand, the structure of the door opening/closing mechanism 5 on the main body 1 side is as follows. That is, 12 in the figure is a latch having a hook receiving portion 12a at the tip and having a substantially L-shape. The latch 12 is rotatably disposed downstream of the hook insertion hole 11 with the hook receiving portion 12a facing the hook insertion hole 11, with the center of its longitudinal portion serving as a pivot point. Therefore, the engaging claw 8a of the hook 8 is inserted into the hook insertion opening 1.
1, it can be releasably engaged with the hook receiving portion 12a of the latch 12. In addition, 13
is a shaft member for rotatably supporting the latch 12. Further, a spring 14 is attached to the rear end of the latch 12 as a biasing means for biasing the latch 12 in the locking direction (clockwise), and the elastic force of the spring 14 is linked to the opening/closing operation of the door body 4. The hook 8 can be engaged and disengaged from the latch 12 by simply moving the door body 4. In addition, 15 is an interlock switch for sensing the closed state of the door body 4, and 16
is a stopper for keeping the latch 12 in the upright position.

Next, the operation of the door opening/closing mechanism 5 configured as described above will be explained.

First, when closing the door body 4, by rotating the door body 4 toward the closing side, the engaging claw 8a of the hook 8 comes into contact with the latch 12 as the door body 4 rotates, and then the latch 12 is closed. It climbs over the hook receiving part 12a and then engages with the hook receiving part 12a as shown by the solid line in FIG. In this way, the hook 8 is held by the elastic force of the spring 14, and the door body 4 is opened and locked. As the hook 8 of the door body 4 is engaged, the interlock switch 15 is closed, the closed state of the door is detected, and high frequency cooking becomes possible.

Furthermore, when opening the door body 4, when a force above a certain level is applied to the door body 4 by applying force to the opening side, the latch 12 resists the elastic force of the spring 14 and moves the shaft. It rotates around the member 13, pushes the hook 8 upward, and moves the latch 12 shown by the broken line A in a direction that makes it easier to disengage from the hook 8. Thereafter, as the door opening operation of the door body 4 proceeds further, the hook 8 separates from the hook receiving portion 12a of the latch 12, the lock is completely released, and the door body 4 can be opened easily. And at this time,
The hook 8 is returned to its original state by the elastic force of the spring 9, and the latch 12 is returned to its original state by the elastic force of the spring 14.

Therefore, the opening/closing operation of the door body 4 does not require a movable handle protruding from the surface of the door body 4.
This can be done using a hook part 17 as an opening/closing operation part with a smooth surface of the door body 4 as shown in the figure.

Therefore, the door body 4 can be made to have a sleek appearance. Moreover, since there are no protrusions on the surface of the door body 4, the door body 4 can be easily cleaned, and cleaning performance can be improved.
Also, the hook 8 on the door body 4 side and the latch 12 on the main body 1 side
Since the door opening/closing mechanism 5 is configured with such a simple structure, there is no need for any mechanism that could damage the yoke, and there is no need to interfere with the yoke structure 6 of the door body 4, so there is no need to worry about radio wave leakage or peeping. There is no need to worry about clouds forming on the window 4a. Moreover, since the mechanism itself has an extremely small number of parts and a simple configuration, it is possible to provide an inexpensive door opening/closing mechanism 5.

In the above-described embodiments, this invention was applied to a door body that opens horizontally, but it can also be applied to a door body that opens vertically.

Effects of the invention This invention enables the door to be opened and closed by the movement of the door body itself, without using an operating member such as a handle. Therefore, there is no need for a handle on the surface of the door body, and the opening and closing of the heating chamber can be opened and closed with a flat door body without any protrusions.

Therefore, the door body can be realized with a clean appearance, and the surface of the door body can be cleaned easily, and cleaning performance can be improved. Further, since there is no need for an operating mechanism for operating the handle inside the chiyoke structure, there is no need to interfere with the chiyoke structure, and there is no need to worry about radio wave leakage or fogging of the viewing window. Moreover, the mechanism itself has a small number of parts such as hooks and latches, and has a simple structure, so it is possible to provide a door opening/closing mechanism with a simple structure and at low cost.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a conventional door opening/closing mechanism;
Figure 3 is a perspective view showing a high-frequency heating device according to an embodiment of this invention, Figure 3 is a perspective view showing the structure of the door opening/closing mechanism on the door body side of an embodiment of this invention, and Figure 4 is the same door opening/closing mechanism. FIG. 5 is a side view showing the structure on the heating device main body side, and FIG. 5 is a sectional view showing the smooth state of the surface of the door body. DESCRIPTION OF SYMBOLS 1... Heating device main body, 2... Heating chamber, 4... Door body, 8... Hook, 12... Latch, 14... Spring (biasing means), 16... Stopper.

Claims (1)

[Scope of utility model registration request] A door body that opens and closes the heating chamber opening of the heating device main body;
A rotatable hook protruding from the back side of this door body, and a roughly L-shaped hook provided rotatably along the protruding direction of the hook on the heating device main body side corresponding to the position of the hook. a latch, a stopper that restricts the rotation of the side of the latch from which the hook protrudes and sets the latch in a position where it can engage with the hook, and biasing means that biases the latch toward the side that is restricted by the stopper. A door opening/closing mechanism for a high frequency heating device characterized by comprising: