JPS634889Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement in the latch structure of a high frequency heating device, a so-called microwave oven.

Conventional technology Conventionally, a latch structure with multiple door keys is
Door key springs are provided for each of the plurality of door keys to provide bias.

Problems that the invention aims to solve: However, by providing door key springs for each of these multiple door keys, if one door key spring is damaged, the door will not be fully attached to the main body of the product, and the radio wave leakage prevention device will fail. The operation of certain latch switches became unstable and did not fully fulfill its function as a radio wave leakage prevention device, resulting in problems such as an increase in radio wave leakage.

The purpose of this invention is to solve these conventional problems, and to provide a safe latch structure that does not pose the risk of radio wave leakage even if the door key spring that biases multiple door keys is damaged. There is.

Means for Solving the Problems In order to achieve the above object, the latch structure of the present invention has a structure in which a plurality of door keys are biased by a common door key spring.

Function The latch structure of the present invention uses a common door key spring for multiple door keys, so if the door key spring is damaged, multiple door keys will not be biased by the door key spring at the same time, and the multiple door keys will be completely turned off. As a result, the door cannot be attached to the product body, and the corresponding latch switch also does not operate, resulting in the product being in a safe failure mode.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

In the figure, 1 is the body cover, 2 is the operation panel, 3 is the door body, 4 is the handle, 5 is the operation button, 6 and 7 are held in the door body 3, and are provided so that they can rotate independently. The door key 8 is the heating chamber. In operation, when the operation button 5 is pressed, the connecting lever 9 is rotated to push up the door key 6 and at the same time push down the door key 7 via the door key lever 10. At this time, by making the shape of the connecting lever into a kind of lever as shown in the figure, the door key 6 first operates the latch switch (door switch 1...not shown), and then the final stroke of the operation button operates the door key 6. The door switch 2 (not shown) is operated via the switch 7, so that there is a time lag in the operation of the first and second switches between the operation strokes of a series of operation buttons. Reference numeral 11 denotes a door key spring that always returns the door keys 6 and 7 with a constant load when the door is closed or when the operation button is released.This door key spring 11 is used to hold the door key 6 and the door key 7 as shown in Fig. 3. The two door keys No. 7 are provided so that they are commonly energized.

With this configuration, if the door key spring 11 is damaged due to long-term use, both door keys 6 and 7 will become inoperable at the same time, so that the door key spring 11 is energized by these door keys 6 and 7. Both the first latch switch 13 and the second latch switch 14 are opened at the same time, which is an outstanding practical feature that not only saves resources by simply using a single spring, but also greatly improves the safety of the product itself. It is effective.

Effects of the invention According to the latch structure of the invention as described above, the following effects can be obtained.

(1) By energizing multiple door keys with a common door key spring, even if the door key spring is damaged, all the door keys will be turned OFF at the same time, and all latch switches will not operate, reducing product safety such as radio wave leakage. The above problem does not occur.

(2) By making multiple door keys rotatable independently, it is possible to provide a time lag in the switching of multiple latch switches corresponding to the door keys, so that electrically the rear latch switch can be turned off when the power is turned off. Since arcing is eliminated, the durability of the switch is improved, and a highly reliable monitor circuit that does not malfunction can be easily formed.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main body of a high-frequency heating device showing an embodiment of the present invention, FIG. 2 is a perspective view showing the same door in an open state, and FIG. 3 is a sectional view of the main part thereof. 4...Door handle, 5...Door operation button,
6, 7...Door key, 9...Connection lever, 10...
...Door key lever, 11...Door key spring.

Claims (1)

[Scope of utility model registration request] The heating chamber has a door that can be opened and closed freely, a plurality of door keys provided inside the door, and a latch switch provided corresponding to the door keys, and the plurality of door keys rotate independently of each other. A high-frequency heating device characterized by being freely configured and energized by a common door key spring.