JP3467841B2 - Heating equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing mechanism for a heating device.

[0002]

2. Description of the Related Art As shown in FIGS. 6 to 8, the structure of an opening / closing mechanism in a conventional heating device comprises a resin-molded operation panel 1 and a printed board mounting plate 2 made of sheet metal on a back surface thereof, and a door (not shown). The shaft part 3a of the opening / closing lever 3 molded with a resin for opening the opening) is inserted into the holding part 4 formed on the back surface of the operation panel and fixed in a rotatable state, so that the opening / closing lever 3 does not come off from the holding part 4. Base mounting plate 2 to prevent
The position regulating wall 2a is provided by cutting and raising a part of the above, and the position is manually determined after inserting the opening / closing lever 3.

Further, a push-up portion 3b, which is engaged with a key 5 slidably held inside the door and pushes up a hook spacer 7 of a hook 6 for restricting the opening / closing of the door, is formed at the tip of the opening / closing lever 3.

[0004]

In the conventional construction as described above, in order to prevent the opening / closing lever 3 from coming off the holding portion 4, a part of the base plate 2 is cut and raised to prevent the position regulating wall 2.
However, it is a work that requires tools such as radio pliers to cut up the sheet metal to manually position it after inserting the opening / closing lever 3, and since the processing is difficult, there are large variations due to the work. 3 comes off,
There has been a problem that the cut and raised parts come into contact with each other and the rotation is deteriorated.

Further, when the hook spacer 7 of the hook 6 is pushed up by the push-up portion 3b of the opening / closing lever 3, since the upper surface of the push-up portion 3b is pushed up so as to rub against the lower surface of the spacer 7, the friction coefficient is made to make the surface slippery. It has been devised such as using a small resin, or applying grease to reduce friction.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an opening / closing mechanism capable of easily opening and closing a door without variations due to work.

[0007]

The present invention has the following structure in order to achieve the above object.

That is, a heating chamber for storing food in the main body for heating and cooking, and a heating device for heating the heating chamber,
A door provided on the front surface of the heating chamber, an opening / closing lever for opening and closing the door, and an operation panel having the opening / closing lever are provided, and an operation panel having an opening / closing lever is provided on the back side of the operation panel, A holding portion for holding the opening / closing lever is formed on the back side of the operation panel, and the shaft portion of the opening / closing lever is inserted into the holding portion so as to be rotatable and formed to project near the shaft portion, and the opening / closing lever is provided near the holding portion. The configuration is such that an inverted L-shaped restricting projection that restricts the lateral movement of the shaft portion and an elastically deformable projection that restricts the vertical movement of the shaft portion are provided.

Further, a vertically sliding key for tightly fixing the door to the heating chamber when the door is closed is provided, and a rotatable hook portion that engages with the key portion and a push-up lever that causes the opening / closing lever to move the hook portion. The push-up portion is provided with two spherical surfaces.

Further, a vertically sliding key for tightly fixing the door to the heating chamber when the door is closed is provided, and a rotatable hook portion that engages with the key portion and a push-up lever that causes the opening / closing lever to move the hook portion. And the two spherical surface projections are formed on the pushing-up portion as spherical surfaces having different sizes, and the spherical surface on the operation panel side is made smaller.

[0011]

In the opening / closing mechanism of the heating device of the present invention, a protrusion is provided near the holding portion on the back side of the operation panel so as to come into contact with the protruding portion of the opening / closing lever and regulate the lateral movement of the opening / closing lever. By providing an elastically deformable protrusion that regulates the opening and closing lever, the workability when inserting the opening and closing lever into the holding part is not impaired, and there is no need to cut and raise the board mounting plate to prevent the opening and closing lever from coming off and This is a configuration that enables stable operation of the opening / closing lever regardless of the variation of

Further, by providing two spherical protrusions on the push-up portion of the opening / closing lever, the respective protrusions come into contact with the spacer at the time of starting the operation of the key that requires the most torque and requires torque, and at the time of pressing the key completely. In addition to reducing friction and performing smooth opening / closing operations, each projection has a different size, and the operation panel side is made slightly smaller than the back side, so This is a configuration for smooth transition of contact.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the operation panel 8 is made of resin and has a holding portion 10 for fixing the opening / closing lever 9 in a rotatable state on the back surface thereof, and the opening / closing lever 9 is provided near the side of the holding portion 10. An inverted L-shaped side regulating protrusion 11 that regulates lateral movement is formed, and an upper regulating protrusion 12 that regulates vertical movement is arranged at a position facing the upper side. The upper regulating protrusion 12 has a shape in which the tip portion is thinner than the root portion. The opening / closing lever 9 has a shaft portion 9a having a cylindrical protrusion at a portion in contact with the holding portion 10 of the operation panel 8.
Overhanging portion 9b which is formed by contacting the side regulating protrusion 11 of the operation panel 8 near the lower portion of the shaft portion 9a and regulates lateral movement.
have. Further, in order to closely fix the door (not shown) to the heating chamber (not shown), the heads 13a and 13b of the key 13 that slides up and down inside the door are caught by the hook 6, and the lower part of the hook 6 is caught. Is the key head 1 due to the rotational movement
It has a hook spacer 14 for pushing up 3b, and the arcuate surface of the lower surface of the hook spacer 14 comes into contact with two spherical surfaces 15a, 15b of different sizes on the upper surface of the pushing-up portion 15 provided at the tip of the opening / closing lever 9 and slides up. To be

The operation of the above configuration will be described below.
When the opening / closing lever 9 is attached to the holding portion 10, the projecting portion 9b is provided on the rear surface of the operation panel 8 with the side regulating protrusion 11a.
When it is laterally displaced, it comes in contact with the side regulating projection 11 to prevent it from coming off. When the opening / closing lever 9 is rotated upward, the upper surface of the overhanging portion 9b contacts the upper regulating projection 12, and the lateral regulating projection 11 overlaps the overhanging portion 9b to prevent the opening / closing lever 9 from coming off. When the opening / closing lever 9 is fixed to the holding portion 10, since the tip portion of the upper regulating protrusion 12 is thinner than the root portion, the upper surface of the protruding portion of the opening / closing lever 9 forces the upper regulating protrusion 12 to be pressed. It is elastically deformed and attached.

When the door is opened, the open / close button 16 is pushed in with a fingertip to push the open / close lever 9 to perform a rotational movement about the shaft portion 9a. At that time, the spherical surface 15a on the upper surface of the push-out portion 15 at the tip of the opening / closing lever 9 comes into contact with the circular arc surface on the lower surface of the hook spacer 14 and pushes the key head 13b upward. As the open / close lever 9 rotates, the spherical surface 15a on the upper surface of the push-out portion 15 moves up along the circular arc surface of the lower surface of the hook spacer 14 to raise it, and immediately before the key head 13b is disengaged from the hook 6, The spherical surface 15b is the hook spacer 1
4 The final push-up is performed by touching the circular arc surface on the bottom surface.

[0017]

As is apparent from the above description, according to the present invention, there is no trouble in insertion of the opening / closing lever, and manual work for preventing the opening / closing lever from being disengaged is not required. The problem of poor rotation due to the occurrence of the problem does not occur.

Further, in the opening / closing mechanism, since the pushing-up portion is provided with the spherical surface protrusion, the contact with the hook spacer, which is conventionally in contact with the surface, becomes the line contact with the tip of the spherical surface, which causes friction. It becomes smaller and the power of pushing up is reduced. And, two spherical surface protrusions are provided, and each protrusion contacts the spesser at the time of the initial operation of pushing up which requires the most friction and requires torque, and at the time of the final push-out, smooth opening and closing operation with less friction should be performed. You can

Further, each protrusion has a different size,
By making the operation panel side smaller than the back side, it is possible to smoothly perform the transition of the contact of the protrusions from the start of the pushing-up operation to the time of the push-cutting operation, and it is possible to provide a stable opening / closing mechanism with a small opening force.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an opening / closing mechanism of a heating device according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part when the opening / closing lever is attached.

FIG. 3 is a sectional view of a main part when the opening / closing lever is pushed up.

FIG. 4 is a cross-sectional view of a main part when the opening / closing lever is pushed up and started.

FIG. 5 is a cross-sectional view of a main part when the opening / closing lever is pushed and cut.

FIG. 6 is an exploded perspective view of an operation panel portion of a conventional heating device.

FIG. 7 is a sectional view of the main part of the opening / closing lever.

FIG. 8 is a sectional view of an essential part when the opening / closing lever is operated.

[Explanation of symbols]

6 hooks 8 Operation panel 9 Open / close lever 9a Shaft 9b Pulling part 10 Holder 11 Side regulating protrusion 12 Upper regulation protrusion 13 keys 14 Hook spacer 15 Push-up section 15a, 15b spherical surface

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F24C 7/02 521 F24C 7/02 360

Claims (3)

(57) [Claims] 1. A heating chamber for storing food in a main body for heating, a heating device for heating the heating chamber, a door provided on the front surface of the heating chamber, and an opening / closing lever for opening and closing the door. An operation panel having the opening / closing lever is provided, a holding portion for holding the opening / closing lever is formed on the back side of the operation panel, and the shaft portion of the opening / closing lever is inserted into the holding portion to enable rotation. And a reverse L-shaped side regulating projection that regulates lateral movement of the shaft portion of the opening / closing lever near the holding portion, and regulates vertical movement to a position opposite to the protrusion. A heating device characterized by having an elastically deformable upper regulating protrusion. 2. A vertically slidable key for tightly fixing to a heating chamber when the door is closed, a rotatable hook portion engaging with the key portion, and a push-up for moving the hook portion to the opening / closing lever. The heating device according to claim 1, further comprising an opening / closing mechanism that is provided with a portion and has two spherical surfaces on the pushing-up portion. 3. A vertically slidable key for tightly fixing to a heating chamber when the door is closed, a rotatable hook part engaging with the key part, and a push-up lever for moving the hook part to the opening / closing lever. 3. The heating device according to claim 2, further comprising a portion, wherein the pushing-up portion has two spherical surface protrusions formed of spherical surfaces having different sizes, and the spherical surface on the operation panel side is made smaller.