JPH0118975Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a high-frequency heating device, and in particular, the invention is related to a high-frequency heating device, and in particular, a door that can be opened and closed smoothly without making a squeak, and that the door is not an electrically exposed part. This invention relates to a high-frequency heating device that prevents this from occurring.

(Prior Art) Conventionally, as shown in FIGS. 1 and 2, this type of high-frequency heating device is provided with a door 2 that can be opened and closed on a high-frequency heating device main body 1, and a door frame 3 of this door 2 has a handle ( a pair of metal hooks 4 that interlock with
4 is provided to be swingable by shafts 4A, 4A, and the door frame 3 and hooks 4, 4 are electrically connected, and these hooks 4, 4 are connected to the high-frequency heating device main body 1, respectively.
A lock switch 7 fixed to the lock mechanism mounting plate 5 is engaged with a pair of latches 6, 6 fixed to the lock mechanism mounting plate 5 to fix the door 2 in the closed state. The door switch 8 is configured to be operated via actuators 9, 9.

Furthermore, as shown in FIG. 3, the door 2 is attached to the high-frequency heating main body 1 by fixing a hinge plate 13 passing through the oven front plate 12 to a hinge receiver 11 attached to the oven side plate 10 of the high-frequency heating main body 1.
The upper edge of the door frame 3 is pivotally connected to a hinge shaft 14 provided at the tip of the hinge plate 13. The lower edge of this door frame 3 is also pivotally connected to a hinge shaft 14 connected to the oven side plate 10, as described above.

Further, a hinge shaft 14 that supports the door frame 3 vertically and is in direct contact with the door frame 3 is connected to and grounded to an oven side plate 10 that is grounded in advance.

(Problem to be solved by the invention) In the high-frequency heating device having such a configuration, the grounded hinge shaft 14 is in direct contact with the door frame 3, so if the lock switch 7 or the door switch 8 breaks down, the actuators 9, 9 Even if the terminal of the switch 7 or 8 is touched and becomes conductive, the door frame 3 will not become an electrically exposed part because it is grounded in advance via the hinge shaft 14, and in the unlikely event that the door frame 3 There was no danger to humans if they came into contact with it.

However, this configuration in which the door frame 3 is directly pivotally connected to the hinge shaft 14 produces a squeaking sound every time the door 2 is opened or closed. Since it is exposed on the outside, it has the disadvantage that it looks unsightly and reduces the product value.

This invention was made in view of the above circumstances, and aims to provide a high-frequency heating device that prevents the generation of squeaks when the door is opened and closed, and also ensures that the door is grounded.

[Structure of the idea]

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a main body of a high-frequency heating device, a door that can be freely opened and closed, which is pivotally connected to the upper and lower hinge shafts of this main body via a bushing, and a swingable hook that is provided in electrical communication with the door frame; a latch that is provided in the main body and locks the door in a closed state by engaging with the hook; A lock switch and a door switch to be operated, a lock mechanism mounting plate that fixes each of these switches and the latch and is grounded in advance, and a ground that is provided on the lock mechanism mounting plate and presses against the hook when the door is closed. The structure includes a metal elastic body for use.

(Function) In the above configuration, the grounding metal elastic body attached to the lock mechanism mounting plate that is grounded in advance,
Since the door is in pressure contact with the door hook when the door is closed, the grounding of the door, which is electrically connected to the hook, is ensured, and even if the actuator becomes a live part due to a failure of the door switch or lock switch, The hook can be reliably grounded by the grounding metal elastic body, and the door becomes an electrically exposed part, effectively preventing electric shock to the human body.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings, and the same parts as those of the conventional example will be described with the same reference numerals.

Door 2 that can be freely opened and closed for the high-frequency heating device main body 1
As shown in FIG. 4, the lower part of the hinge receiver 11 is fixed to the oven side plate 10 of the main body 1 of the high-frequency heating apparatus 1, and one end of the hinge plate 13 is attached to the upper part of the hinge receiver 11 with screws 15, 15. Tighten. The other end of the hinge plate 13 is the oven front plate 12
A hinge shaft 14 is fixed to the other end of the hinge plate 13 by caulking, and the upper edge of the door 2 is pivotally attached to the hinge shaft 14 via a bush 16. Further, the lower end of the door frame 3 is also pivotally connected to the hinge shaft 14 connected to the oven side plate 10 via a bush 16 in the same manner as described above, and the door 2 is provided in the high-frequency heating apparatus main body 1 so as to be openable and closable.

Further, at the end of each hinge shaft 14, there is a metal spring 17 whose one end is welded and fixed to the door frame 3.
The other end is pressed.

Further, the locking mechanism of the door 2 is constructed as shown in FIG. As shown in FIG. 5, a metal plate spring 18 as a grounding metal elastic body is fixed via a screw 19, and this grounding metal plate spring 18 comes into contact with the hook when the door 2 is closed. It is set up like this.

In the above configuration, its operation will be explained.

When the door 2 is closed, the hooks 4, 4 engage the latches 6, 6 provided on the lock mechanism mounting plate 5, and the tips of the hooks 4, 4 push the actuators 9, 9 of the switches 7 and 8, and the door is closed. A hook 4 electrically connected to the frame 3 is pressed against a grounded metal plate spring 18. Therefore, when the door 2 is in the closed state, the hook 4 can always be grounded. Therefore, even if the actuator 9 becomes a live part due to a failure of the lock switch 7 or the door switch 8, the metal hook 4 is grounded via the metal plate spring 18 that is in pressure contact with the door. The frame 3 does not become an electrically exposed part and can reliably prevent electric shock to the human body.

[Effect of idea]

As explained above, in this invention, the upper and lower hinge shafts that hold the openable and closable door are pivotally connected to the door through the bushings, so when the door is opened and closed, it can be opened and closed smoothly without producing any squeaks. In addition, even if the door switch or lock switch fails and the actuator becomes a live part, the hook is always pressed by the grounding metal elastic body and is securely grounded when the door is closed. , it is possible to reliably prevent the door from becoming an electrically exposed part, and to provide an extremely safe high-frequency heating device.

[Brief explanation of the drawing]

Figures 1 to 3 show conventional examples.
The figure is a front view of the appearance of the high-frequency heating device, FIG. 2 is a side view showing the lock mechanism, FIG. 3 is a cross-sectional view showing the connection state of the high-frequency heating device main body and the door, and FIGS.
The figures show an embodiment of the high-frequency heating device according to the present invention. Fig. 4 is a sectional view showing the state in which the main body of the device and the door are connected, and Fig. 5 shows the state in which the earthing metal plate spring is pressed into contact with the hook. FIG. In the figure, 1 is the main body of the high-frequency heating device, 2 is the door, 3 is the door frame, 4 is the hook, 5 is the lock mechanism mounting plate, 7 is the lock switch, 8 is the door switch, 9 is the actuator, and 18 is the metal plate spring for grounding ( (grounding metal elastic body).

Claims (1)

[Scope of utility model registration request] A high-frequency heating device main body, a door pivotally connected to the upper and lower hinge shafts of the main body via a bushing, which can be opened and closed, a swingable hook provided on the door and connected to the door frame; a latch that is provided on the door and locks the door in a closed state by engaging with the hook; a lock switch and a door switch that are operated by the hook via an actuator; A high-frequency heating device comprising: a grounded lock mechanism mounting plate; and a grounding metal elastic body provided on the lock mechanism mounting plate and pressed against the hook when the door is closed.