JPH0228332Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a high-frequency heating device with an improved door structure.

[Technical background of the invention and its problems]

Generally, the high-frequency heating device is comprised of a main body with an open front and a door provided on the front of the main body so as to be openable and closable. This door includes a door plate, a door frame fitted around the periphery of the door plate, and an outer barrier whose periphery is held between the inner surface of the door frame and the outer surface of the door plate.

Conventionally, the door plate and the door frame have been connected as shown in FIG. That is, an embossment c in which a screw hole b is formed is provided on the inner surface of a door frame a molded from a synthetic resin, and a mounting piece e is cut and raised on the periphery of the door plate d. Emboss e above c
It was fixed with Ninuji f. However, according to such a structure, the screw hole b in the emboss c must be formed in a separate process from the molding of the door frame a, which not only takes time, but also makes it difficult to form the screw hole b in the emboss c.
However, the use of this method increased the number of parts, leading to an increase in costs. Also, screw f
Emboss c for screwing must have a relatively large diameter in order to have sufficient strength. Then, since the wall thickness of the emboss c becomes considerably larger than the wall thickness of the door frame a, sinkage g tends to occur on the outer surface of the door frame a corresponding to the emboss c. Therefore, the appearance of the door frame a may be damaged by the sinkage g, and if the sinkage g is large, the door frame a may be defective. Further, the outer barrier h is only held at its peripheral portion by the door frame a and the door plate d. Therefore, the outer barrier h
There were cases where the device would wobble vertically and horizontally due to vibrations and shocks. If the outer barrier h were to shift and collide with the door frame a, there was a risk that the synthetic resin door frame a would be damaged by this impact.

[Purpose of invention]

This idea allows the door plate and door frame to be connected and fixed without using screws, making processing and assembly easier. To provide a high frequency heating device which prevents a door frame from being damaged due to displacement of a barrier.

[Summary of the idea]

The high-frequency heating device of this invention includes a main body with an open front and a door provided on the opening surface of the main body so as to be openable and closable. A panel comprising a plate and an outer barrier held between the door plate and the door frame, wherein each of the four sides of the door plate is formed so as to face the front piece of the door frame. at least four fitting holes, each of the fitting holes being provided on each of the four sides of the door frame so as to fit the four sides of the outer barrier between the door frame and the door plate; at least four protrusions that are fitted into the door frame, and an engaging portion that is provided on the door frame side and engages with the door plate to hold each of the protrusions in a state where each of the protrusions is fitted into each of the fitting holes, It is characterized in that the protrusions on the four sides of the door frame are opposed to the outer edges of the four sides of the outer barrier.

According to such a configuration, when assembling the door,
First, store the outer barrier in the door frame, store the door plate in the door frame so as to overlap it, fit each fitting hole of the door plate into the protrusion of the door frame, and then fit the door plate into the door frame side. When the door plate is engaged and held by the door frame and the door plate, the four sides of the outer barrier are sandwiched between the door frame and the door plate, and these three parts are integrated, and the assembly work is completed. Therefore, there is no need for a conventional screw-fastening structure, and the structure and assembly are easy. Moreover, the door frame 4
Since the protrusions on the sides face the outer edges of the four sides of the outer barrier, the protrusions restrict vertical and horizontal displacement of the outer barrier, preventing damage to the door frame due to rattling of the outer barrier. be done.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 2 to 5. The high-frequency heating device shown in FIG. 2 includes a box-shaped main body 1 with an open front. A door 3 having a handle 2 is attached to the front surface of the main body 1 so as to be openable and closable. This door 3 is formed from a door plate 4, a door frame 5, and an outer barrier 6. That is, as shown in FIG. 3, the door plate 4 has a rectangular punching hole 7 and a peripheral portion 9 having a substantially U-shaped cross section with an inner piece 8a continuous along the entire periphery of the punching hole 7. It is molded in one piece. A rectangular first engagement hole 10 is formed in the center of each of the four outer pieces 8b of the peripheral part 9, which is the four sides of the door plate 4, and the first engagement hole 10 of the intermediate piece 8c A pair of second engagement holes 11, which are semicircular engagement holes, are bored at positions corresponding to both sides of the second engagement hole 10, respectively.

Therefore, two second engagement holes 11 are formed on each of the four sides of the door plate 4 so as to face the front piece 13 of the door frame 5.

The door frame 5 is made of synthetic resin and is molded to a size corresponding to the door plate 4. This door frame 5 has an outer peripheral piece 12 and a front piece 1 as shown in FIGS. 4 and 5.
3, the cross section is approximately L-shaped. An outer peripheral piece 1 of the door frame 5 that is joined to the outer piece 8b of the door plate 4
A wedge-shaped first protrusion 14 serving as an engaging portion is protruded from the inner surface of 2 at a position corresponding to the first engaging hole 10 . Further, a semi-cylindrical second protrusion 15 is provided on the inner surface of the front piece 13 at a position corresponding to the second engagement hole 11 . Then, the door frame 5 is fitted onto the door plate 4 by engaging the first engagement hole 10 with the first protrusion 14 and engaging the second engagement hole 11 with the second protrusion 14. ing. At this time,
Since the first protrusion 14 engages with the first engagement hole 10 by elastically deforming the outer circumferential piece 12 of the door frame 5 outward, the door frame 5 externally fitted on the door plate 4 It will not come off unless it is elastically deformed.

On the other hand, the outer barrier 6 is provided so that its peripheral portion is sandwiched between the outer surface of the intermediate piece 8c of the door plate 4 and the inner surface of the front piece 13 of the door frame 5. In other words, door plate 4
is interposed between these before being attached to the door frame 5. The outer edges of the four sides of the outer barrier 6 are connected to second protrusions 1 protruding from each of the four sides of the door frame 5.
These protrusions 15 prevent the door plate 4 from shifting between the door plate 4 and the door frame 5.

According to the high-frequency heating device configured in this way, the door plate 4 and the door frame 5 are connected to the first and second protrusions 1.
4 and 15 into the first and second engagement holes 10 and 11, they are integrally coupled. Therefore, it is not necessary to use screws to connect the door plate 4 and the door frame 5. In addition, since no screws are required, there is no need to protrude an emboss with a screw hole into which the screw is screwed, and the first and second protrusions 14 and 15, which have a smaller volume than the emboss, are provided to protrude. do it. Therefore, not only is sinkage less likely to occur in the door frame 5 molded from synthetic resin, but also the effort of machining screw holes can be saved. Furthermore, the outer barrier 6 whose peripheral portion is held between the door plate 4 and the door frame 5,
A second protrusion 15 protruding from the door frame 5 restricts the door frame 5 from shifting. Therefore, when vibration or impact is applied to the door 3, the outer barrier 6 will not shift and collide with the door frame 5, so the synthetic resin door frame 5 will not be damaged by the outer barrier 6. I'm never forced to do it.

Note that this invention is not limited to the above-mentioned example,
For example, the means for regulating the displacement of the outer barrier 6 may be such that a tongue piece as a protrusion is cut and raised from the intermediate piece 8c of the door plate 4, and this tongue piece is applied to the outer peripheral edge of the outer barrier 6 to regulate it. good.

[Effect of idea]

As described above, this invention has at least four fitting holes formed on each of the four sides of the door plate so as to face the front piece of the door frame, and on each of the four sides of the door frame. at least four protrusions provided on the door frame side and fitted into each of the fitting holes so as to sandwich the four sides of the outer barrier between the door frame and the door frame, and the door plate provided on the door frame side. and an engaging portion that engages with and holds each of the protrusions in a fitted state in each of the fitting holes, and each of the protrusions on the four sides of the door frame is connected to the outer edge of the four sides of the outer barrier. They are configured to face each other. Therefore, compared to the conventional structure in which the door plate and door frame are connected with screws, there is no need for screws or embossing with screw holes for screwing the screws, which simplifies assembly work and reduces the number of parts. It is possible to reduce costs by reducing . Also, since it is only necessary to protrude a protrusion with a smaller volume than the above-mentioned embossing on the door frame,
When the door frame is molded from synthetic resin, there is no possibility of defective products due to sink marks. Furthermore, since the outer barrier is prevented from shifting by the projections, the shifting causes a shock to the door frame.
There is no possibility of damaging this door frame.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional coupling structure between a door plate and a door frame, Figure 2 is a perspective view of the entire device showing an embodiment of this invention, Figure 3 is a perspective view of the door plate, and Figure 4 is a perspective view of the door plate. The figure is an exploded perspective view of a part of the door plate and the door frame, and FIG. 5 is a sectional view of the door plate and the door frame in a combined state. DESCRIPTION OF SYMBOLS 1...Main body, 3...Door, 4...Door plate, 5...Door frame, 6...Outer barrier, 10...First engagement hole, 1
1... Second engagement hole (fitting hole), 13... Front piece,
14...First protrusion (engaging portion), 15...Second protrusion (protrusion).

Claims (1)

[Scope of utility model registration request] It has a main body with an open front and a door provided on the opening surface of the main body so as to be openable and closable, and the door is connected to a door frame, a door plate housed and held within the door frame, and the door plate and the door plate. In a high-frequency heating device constituted by an outer barrier held between a door frame and a door frame,
at least four fitting holes formed on each side so as to face the front piece of the door frame; and at least four fitting holes provided on each of the four sides of the door frame between the door frame and the door plate. at least four protrusions that are fitted into the respective fitting holes so as to sandwich the four sides of the outer barrier; and an engaging part that is held in a fitted state in the fitting hole, and each protrusion on the four sides of the door frame faces the outer edge of the four sides of the outer barrier. Device.