JPH0142729Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a cooking device such as a microwave oven or an electric oven.

[Prior art]

Cooking devices have protrusions on the door or lever connected to the switch so that the switch opens and closes in conjunction with the opening and closing of the door, but conventional ones often have protrusions made of synthetic resin, which can easily fall off or break. There was a risk that it would happen.

[Purpose of invention]

This design allows the end of the metal lever connected to the switch to protrude directly toward the door, preventing it from falling off or breaking like in the past. It is made so that there is no danger even if it comes into contact with it.

[Example] An embodiment embodying the present invention will be described below with reference to the drawings. 1 is an outer box of a heating cooker such as a microwave oven, 2 is an inner box forming a heating cooking chamber, and 3 is a heating cooking device. A front plate installed around the front opening of a chamber.

Reference numeral 4 denotes a door that can be opened and closed to cover the front opening of the heating cooking chamber, and is rotatably mounted on a shaft 4a at the lower end. 5 is an operation panel fixed to the outer box 1 below the door 4, and 5a is a picture frame-like decorative frame attached to the front plate 3 so as to surround the top and left and right sides of the door 4.

Reference numeral 6 denotes a push button, which is rotatably attached to the operation panel 5 with a shaft 7 and is pushed outward by a spring 8.

9 is a support plate, and 10 is a switch attached to the support plate 9. Reference numeral 11 denotes a first sliding lever, which is slidably supported in the front-rear direction by bent portions 9a, 9a of the support plate 9, with a front end bent portion 11b facing the push button 6, and a sliding lever on the side edge of the lower end. A recessed stepped portion 11a is provided that is recessed in a direction perpendicular to the moving direction.

Reference numeral 12 denotes a second sliding lever, which is supported by the bent portions 9b, 9b of the support plate 9 so as to slide in a direction perpendicular to the first sliding lever 11, that is, in the vertical direction;
The lower end is provided with a bent portion 12a facing the lower end side edge of the first sliding lever 11, and one side is provided with a switch operating portion 12b facing the button 10a of the switch 10.

A torsion spring 13 has one end pushing the first sliding lever 11 toward the push button 6, and the other end pushing the second sliding lever 12 downward.
This torsion spring 13 connects the first and second sliding levers 1 to the support plate 9 to which the switch 10 is attached.
1 and 12 through the respective bent portions 9a, 9a, 9b, and 9b, insert the stepped bent portion 13a at one end into the small hole 12c of the second sliding lever 12, and insert the stepped bent portion 13a at the other end into the small hole 12c of the second sliding lever 12. Similarly, after inserting the stepped bent portion 13b into the small hole 11c of the second sliding lever 11, insert the straight portion at one end into the concave notch groove 9c of the rear bent portion 9a against the elasticity of the spring itself. At the same time, the second sliding lever 1
The downward movement of the first sliding lever 11 is restricted by the contact between the straight portion of one end of the torsion spring 13 and the inner bottom surface of the notched groove 9c, and the forward sliding of the first sliding lever 11 is also restricted by the spring. It is regulated by the contact between the other end bent portion 13b of 13 and the rear surface of the rear bent portion 9a.
Therefore, those first and second sliding levers 11,
12 and the like can be attached to the panel substrate 5b very easily, and the torsion springs 13 can be easily replaced.

Reference numeral 15 denotes a third lever, which is bent into a U-shape in plan and is rotatably attached to a pair of left and right mounting legs 17 protruding from the upper inner surface of the front plate 3 by a shaft 17a. On one arm of this third lever 15,
A burring portion 15a surrounding the shaft 17a is formed, and an adjustment plate 16 is stacked so as to rotate around the burring portion 15a. The adjustment plate 16 is fixed at an arbitrary adjustment position with respect to the lever 15 by a screw 16b inserted into a long hole 16a.

The other arm of the lever 15 is attached to the front edge of the front plate 3 side,
It has a semicircular protrusion 15b that protrudes through the through hole 3a provided in the front plate 3, and the protrusion 1
A bent portion 15 is bent toward the decorative frame 5a around the frame 5b.
It has c. Further, the rear edge has a rising edge 15d formed larger than the through hole 3a so as to cover the through hole 3a from the rear. The lever 15 has a protrusion 15b that is connected to the through hole 3.
It is biased by a spring 19 in a direction protruding from a. The spring 19 is provided with an assembly operation part 19a extending rearward at one end thereof. Therefore,
When attaching the spring 19, the third lever 15, etc. to the mounting leg 17, the operating portion 19a of the spring 19
By manually operating the spring 19 on the rear adjusting plate 16 side, it becomes easy to hold the spring 19 in the normal operating position, and in this state, the shaft 17a can be easily inserted and assembled from one side of the mounting leg 17. I can do it.

A wire 18 connects the adjustment plate 16 and the second sliding lever 12, and is provided with a tension spring 18a in the middle.

In FIGS. 7 to 10, a push button 6 made of opaque resin is used to turn on or off an indicator lamp 20 (attached to the panel substrate 5b), which is controlled to turn on in response to the opening/closing operation of the switch 10. Button 6
A window 21 is formed to allow observation from the outside, and a lamp cover 22 made of an elastic semi-transparent resin is fitted into the window 21. That is, since the lamp cover 22 is provided with a pair of elastic protrusions 23 at both ends that can be bent against its own elastic force, when attaching the elastic protrusions 23, the lamp cover 22 must be attached as shown in FIG. When the elastic protrusions 23 are slid in the direction of the arrow shown in FIG.
a, the tips of the elastic protrusions 23 are bent in a direction toward each other as shown in FIG. Then, when the lamp cover 22, which has been slid to the position indicated by the chain line in FIG.
2a fits into the window 21, and a pair of fins 22b on both sides
At the same time as the elastic protrusions 23 come into contact with the hole edges of the window 21, the elastic protrusions 23 that have come off from the respective retaining protrusions 24 elastically return to the upright state, and their respective tip surfaces engage with the inner bottom surfaces 24b of the retaining protrusions 24. This prevents the lamp cover 22 from coming off. A plurality of partition frames 22b are formed on the back side of the protrusion 22a of the lamp cover 22, thereby reinforcing the lamp cover and accentuating the light emission display of the indicator lamp 20.

[Effect]

In the above configuration, as shown in FIG. 2, when the door 4 is closed and the protrusion 15b is pushed, the third lever 15
and the adjustment plate 16 rotate together to pull up the wire 18 and slide the second sliding lever 12 upward, so that the bent portion 12a is the side edge of the lower end of the first sliding lever 11. comes into contact with. At this time, since the vertical movement amount S2 of the adjustment plate 16 is set larger than the sliding amount S1 of the second sliding lever 12, the tension spring 18a is stretched by the difference, and the second sliding lever 12 The force that causes it to slide upward is stored. Note that the spring force of the torsion spring 13 is smaller than that of the spring 18a.

When the push button 6 is pressed to slide the first sliding lever 11 backward from the above state as shown in FIG. , the lever 12 further slides upward according to the stored force of the spring 18a, and the switch actuator 12a pushes the switch 10 to close it. Even if the push button 6 is released, the switch 10 remains closed.

Also, when the door 4 is opened, the third
When the lever 15 returns, the torsion spring 1
3, the second sliding lever 12 is lowered as shown in FIG. 1, and the first sliding lever 11 is also slid forward toward the push button 6. As soon as the second sliding lever 12 is lowered, the switch 10 is opened.

When the door 4 is open, even if the push button 6 is pressed, the first sliding lever 11 slides but the second sliding lever 12 does not slide, so the switch 10 is not closed.

With the door 4 open, the protrusion 15 of the lever 15
Since the through-hole 3a is formed larger than that of the through-hole 3a, the inside of the outer box 1 can be seen through the gap in the through-hole 3a. However, since it is blocked by the raised edge 15d of the lever 15, it is not possible to see through to the inner device at the back. Therefore, there is an advantage that no special shielding member is required.

In addition, when the door is open, the protrusion 1 of the lever 15
5b protrudes forward from the through hole 3a, but since the bent portion 15c is bent toward the decorative frame 5a, even if the lever 15 is made by press working a steel plate, the edges of the steel plate may not touch the edge of the lever 15. is never touched. If the bent portion 15c does not exist or if it is bent to the opposite side, fingers may be caught or stabbed, which is dangerous.

[Effect of idea]

As described above, according to this invention, the protruding part can be integrally provided on the lever by pressing a steel plate or the like, so that the protruding part does not fall off or break as in the conventional lever. In addition, it is safe to use because your fingers do not touch the edges of the steel plate or the like.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the door in the open state, Figures 2 and 3 are
The figure is a vertical sectional view of the main part in an operating state, FIG. 4 is an enlarged sectional view taken along the line A-A in FIG. 1, and FIG. 5 is an exploded perspective view of the main part.
FIG. 6 is a partially cutaway perspective view of the main part.
Figures 7 to 10 show how to attach the lamp cover. Figure 7 is an exploded perspective view, Figure 8 is a sectional view of the main parts, Figure 9 is a sectional view explaining the operation, and Figure 10 is a sectional view of the main parts.
The figure is a sectional view taken along the line B--B in FIG. 9. 3 is the front plate, 3a is the through hole, 4 is the door, 5a is the decorative frame, 10 is the switch, 15 is the third lever, 15
b is a protruding portion, and 15c is a bent portion.

Claims (1)

[Scope of utility model registration request] A front plate 3 is provided around the front opening of the heating cooking chamber, and a decorative frame 5a is provided on the front plate 3 so as to surround a door 4 that can open and close the opening, and is turned on and off in conjunction with the opening and closing of the door 4. A metal plate lever 15 linked to a switch 10 for operation is movably arranged inside the front plate 3, and a through hole 3 provided in the front plate 3
The end of the lever 15 is made to protrude from a toward the door 4, and the front edge of the protrusion 15b is bent toward the decorative frame 5a so that the edge of the protrusion 15b is not exposed toward the door 4. A heating cooker characterized by being provided with a bent portion 15c.