JPH0222565Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a heating cooking device such as a microwave oven, and particularly to a door opening/closing device provided with a door lock mechanism in this heating cooking device.

[Technical background of the invention and its problems]

The door opening/closing device for this kind of heating cooking device that has already been proposed has an operation panel and a side-opening door that can be opened and closed freely on the front of a box-shaped case body (cabinet) that forms an oven. A grip-type handle with a push button is attached to a part of the handle, and by pressing the push button that is linked to the gripping operation of this handle, the hook attached to the opening/closing door is released from the door lock mechanism built into the case body side. The door can be opened by rotating it sideways.

However, since the handle of the opening/closing door in the heating cooking device mentioned above is attached so as to protrude forward, it not only gets in the way when installed in the kitchen, but also has a hook that is linked to the push button of the handle.
Since the door lock mechanism that engages and disengages this device is configured to prevent radio wave leakage, the structure is complicated and the number of components increases, making assembly and adjustment troublesome.

On the other hand, instead of a door opening/closing device using a push button on the handle in a heating cooking device equipped with a door lock mechanism, a push button for the door is installed at the bottom of the operation panel.
Although it has been proposed that a device with a Since a door lock mechanism using a door push button operating link mechanism is incorporated, installation is limited in terms of location, and also requires a large number of components, making assembly and adjustment difficult.

[Purpose of invention]

In order to solve the above-mentioned problems, the present invention has a door lock mechanism attached as a unit to the side wall of the oven frame that forms the machine room, allowing the door to be opened and closed safely and reliably while preventing radio wave leakage. To provide a cooking device which aims at saving labor through mass production and improving ease of operation by making the component parts into units to facilitate assembly, adjustment and compatibility. It is something.

[Summary of the idea]

The present invention provides a case body with an opening/closing door that opens sideways, a lock board having a lock portion that engages with a hook member of the opening/closing door, and a lock board in the oven frame body inside the case body, and a lock board in the middle of the case body. forming a horizontal guide frame and a vertical guide frame perpendicular thereto;
A horizontal slider biased outward from the horizontal guide is provided to activate a safety switch, the vertical slider is fitted into the vertical guide frame, and an intermediate slider is slid in the middle of the vertical slider via a spring. In the door lock mechanism installed in the door lock mechanism, a cover member is formed so that a part of the intermediate slider protrudes laterally and is attached to the lock substrate where the vertical guide frame is located, and a lower part of the cover member. a horizontal support shaft mounted on the horizontal support shaft, a switch actuating arm that locks the intermediate slider that is coaxially mounted on the horizontal support shaft, and a door lock release member that pushes up the vertical slider. It is designed to facilitate assembly and save labor through mass production.

[Example of idea]

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

In FIGS. 1 to 7, reference numeral 1 denotes a box-shaped case body (cabinet) of the heating cooking device, and inside this case body 1, an oven frame 3 forming an oven 2 is provided. A sideways opening door 4 is provided in the opening 3a of the oven frame 3 so as to be openable and closable. or,
An operation panel 8 equipped with a timer 5, a cooking push button 6, and a door push button (door opening push button) 7 is attached to the front of the case body 1, and the case body where this operation panel 8 is located is attached. 1 has a built-in door lock mechanism that constitutes the main part of the present invention.

That is, in FIG. 2, a pair of hook members 9 are provided at the free end 4a of the opening/closing door 4 so as to slide downward by the elasticity of a coil spring 10. Each lock portion 11a, 1 engages each hook 9a, 9b of the hook member 9.
A lock board 11 having a structure 1b is attached to a side chamber of the oven frame 3. Also, the above hook 9
A first door switch 12 is attached to the engagement passage where the hook 9a engages with the lock portion 11a when the door is closed. I'm starting to do that. Furthermore, a horizontal guide frame 13 is formed in the middle of the lock base plate 11 where the lock portion 11b that engages the hook 9b is located, and the horizontal guide frame 13 has a horizontal slider 14 having a notch 14a. is biased outward (to the left in FIG. 2) by the elasticity of the coil spring 15, and is provided so as to be able to slide in the horizontal direction. Furthermore, a contact 16a of a safety switch 4 (short switch) 16 is provided in a protruding manner in the moving path of the notch 14a of the horizontal slider 14, and the contact 16a of the safety switch 16 is connected to the locking portion 11b of the hook 9b. When engaging, when pushing one end of the horizontal slider 14 against the elasticity of the coil spring 15, the horizontal slider 1
The safety switch 16 is actuated by pushing with the notch 14a of No. 4.

On the other hand, near the horizontal guide frame 13 formed in the middle of the lock board 11, a pair of vertical guide frames 17 are provided perpendicularly to the horizontal guide frame 13 so as to form a vertical groove. Frame 17
A vertical slider 18 is fitted therein. or,
The vertical slider 18, as shown in FIG.
A head 18b is provided at the top of the main rod 18a, and a leg portion 18c is provided at the bottom of the main rod 18b, and the leg portion 18c is adapted to be pushed up by a door lock release member 26, which will be described later. Further, as shown in FIG. 4, an intermediate slider 19 is slidably provided on the main rod 18a of the vertical slider 18 with a coil spring 20 interposed therebetween. The slider 18 is urged to float. Furthermore, the intermediate slider 19
is provided with a locking piece 19b that locks an actuation piece 19a of the second door switch 21 and a switch actuation arm rod 25, which will be described later.
As shown in FIG.
The inclined surface 19c is designed to easily engage and disengage the switch operating arm 25 without being deformed by wear or high heat caused by use.

On the other hand, as shown in FIGS. 3 and 4, a cover member 22 is provided on the lock substrate 11 on which the vertical guide frame 17 is located, and the cover member 22 is attached to the intermediate slider 19.
The operating piece 19a and the locking piece 19b are attached so as to protrude laterally (horizontally). That is, this cover member 22 covers the vertical slider 1.
8 and the intermediate slider 19 from falling off to the side, and the locking piece 19b is designed to protrude laterally into a hole 22a bored in the middle of the cover member 22 ( (See Figure 4). A bearing 223 is formed at the bottom of the cover member 22, and a horizontal support shaft 24 is horizontally mounted on the bearing 23, as shown in FIGS. 3 and 4. Furthermore, a switch actuation arm 25 and a door lock release member 26 are coaxially mounted on the horizontal support shaft 24, and the switch actuation arm 25 has an actuation rod portion 25a and a push rod portion 25b. This switch actuating arm rod 2
The operating rod portion 25a of No. 5 is urged by the elasticity of the coil spring 27 so as to engage with the locking piece 19b of the intermediate slider 19. Furthermore, as shown in FIG. 3, a door lock release member 26 coaxially mounted below the switch operating arm 25 has a release piece 26a located below the leg piece 18c of the vertical slider 18. The release piece 26a is configured to separate the hook 9b of the hook member 9 from the lock portion 11b via the vertical slider 18.

In particular, as described above, the cover member 22 and the horizontal support shaft 24
The switch operating arm 25 and the door lock release member 26, which are coaxially mounted on the Since it can be assembled into the lock board 11 all at once, assembly is easy and labor savings can be achieved through mass production.

On the other hand, the cooking push button 6 having a push rod 6a is provided at the lower part of the operation panel 8 located on the front side of the push rod portion 25b so as to protrude forward by the elasticity of the coil spring 6b. On the operation panel 8, which is located below the cooking button 6 and on the front side of the door lock release member 26, a door push button 7 having a push rod 7a is connected to a coil spring 7b. It is attached so that it protrudes forward with elasticity.

Next, the electric circuit shown in FIG. 6 is an electric circuit diagram of the heating cooking apparatus according to the present invention, and the power supply circuit 28 of this electric circuit diagram includes the first door switch 12, the second door switch 21, the thermostat A switch 36 and a safety switch 16 are attached,
Further, the power supply circuit 28 includes a timer 5 having a timer switch 5a, an interior light 29, a fan motor 30, a turntable motor 31, a high voltage transformer 32, and a magnetron 35 including a high voltage rectifier 33 and a high voltage capacitor 34. Each is provided.

The operation of the present invention will be explained below.

(1) When the opening/closing door 4 is opened As shown in FIG. 1 and FIG. Each lock part 11 of
a, 11b (see FIG. 1 and FIG. 7A).

(2) When closing the opening/closing door Next, when the shelf board on which the food to be cooked is placed is inserted into the oven 2 and the opening/closing door 4 is closed, as shown in FIGS. 2 and 7B. , the hook member 9
At the same time that the hooks 9a and 9b engage the lock portions 11a and 11b of the lock board 11, the one hook 9a engages the first door switch 12.
Turn on. On the other hand, the other hook 9b pushes the horizontal slider 14 against the elasticity of the coil spring 15, so that the notch 14a of the horizontal slider 14
operates the safety switch 16 and pushes down the head 18b of the vertical slider 18 against the elasticity of the coil spring 20. Then, this vertical slider 1
8 slightly descends together with the intermediate slider 19 against the elasticity of the coil spring 20, but the locking piece 19b of the intermediate slider 19 touches the stepped portion 2 of the actuating rod portion 25a of the switch actuating arm rod 25.
5c, this intermediate slider 19
is in a temporarily locked state, and the operating piece 19a of this intermediate switch 19 is in a state where the second door switch 2
The first actuating piece 21a cannot be pushed and remains in the standby state (see FIG. 7B).

Next, after setting the timer, by pushing the cooking push button (start button) 6 of the operation panel 8 against the elasticity of the coil spring 6b, this push rod 6a pushes the switch operating arm rod 25. By rotating the rod portion (see FIG. 4) around the horizontal support shaft 24 against the elasticity of the coil spring 27, the locking piece 19b of the intermediate slider 19 engages with the stepped portion 25c of the operating rod portion 25a. distance from. Then, the intermediate slider 19 descends due to the elasticity of the coil spring 20, so that the actuating piece 19a of the intermediate slider 19
Then, the second door switch 21 is turned on by pushing the operating piece 21a of the second door switch 21 (see FIG. 7C).

However, when you remove your finger from the cooking push button 6,
As shown in FIG. 7D, the second door switch 21 is kept in the ON state.

(3) When reopening the opening/closing door When reopening the opening/closing door 4 after the timer setting time has elapsed, as shown in FIG. 7E, press the door push button 7 against the elasticity of the coil spring 7b. By pushing the door lock member 7a, the push rod 7a rotates the door lock release member 26 around the horizontal support shaft 24. Then, the release piece 26a of the door lock member 26 pushes up the leg piece 18c of the vertical slider 18, and
The head 18b of the vertical slider 18 locks the hooks 9a, 9b of the hook member 9 into the respective locking portions 11a,
11b. Then, the horizontal slider 14 and intermediate slider 19 return to their original positions, and the first door switch 12, second door switch 21, and safety switch 16 operate to open the door.

[Effect of idea]

As described above, according to the present invention, the case body 1 is provided with the opening/closing door 4 that opens laterally, and the lock board 11 having the lock portion 11a that engages with the hook member 9 of the opening/closing door 4 is inserted into the case body 1. A horizontal guide frame 13 and a vertical guide frame 1 perpendicular to the horizontal guide frame 13 are provided in the middle of the lock board 11.
A horizontal slider 14 is provided on the horizontal guide frame 13 so as to actuate the safety switch 16, and a vertical slider 18 is fitted on the vertical guide frame 17.
In a door lock mechanism in which an intermediate slider 19 is slidably inserted in the middle via a spring 20, a part of the intermediate slider 19 is attached to the lock substrate 11 on which the vertical guide frame 17 is located. A cover member 2 formed to project laterally.
2, a horizontal support shaft 24 mounted on the lower part of the cover member 22, a switch operating arm 25 for locking the intermediate slider 19 coaxially mounted on the horizontal support shaft 24, and a vertical slider 18. Since the door lock release member 26 is configured to push up, the components can be assembled as a unit to double lock the opening/closing door 4, and the configuration is also simplified. It is easy to assemble, saves labor through mass production, and has excellent effects such as preventing radio wave leakage and opening and closing the door safely and reliably.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the heating cooking device according to the present invention showing the opening/closing door in an open state, Fig. 2 is a side view showing a partially cut away main part of the invention, and Fig. 3 is a ,
FIG. 4 is a perspective view of each component used in the present invention, FIG. 5 is an enlarged side view of the intermediate slider incorporated in the present invention, and FIG.
Electrical circuit diagrams incorporated in the present invention, Figures 7A, B,
C, D, and E are each diagram for explaining the operation of the present invention. DESCRIPTION OF SYMBOLS 1...Case body, 4...Opening/closing door, 9...Hook member, 11...Lock board, 12...First door switch, 13...Horizontal guide frame, 14...Horizontal slider, 15...Coil spring, 16... Safety switch, 17... Vertical guide frame, 18... Vertical slider, 19... Intermediate slider, 21... Second door switch, 22... Cover member, 24... Horizontal support shaft, 25... Switch operation Arm bar, 26...Door lock release member.

Claims (1)

[Scope of utility model registration request] A door that opens horizontally is provided in the case body, a lock board having a lock portion that engages with a hook member of the door is provided in the oven frame body within the case body, and a horizontal guide frame and a horizontal guide frame are provided in the middle of the lock board. A vertical guide frame is formed perpendicular to this, a horizontal slider biased outward is provided on this horizontal guide frame in a manner that activates a safety switch, a vertical slider is fitted in the vertical guide frame, and the vertical slider In a door lock mechanism in which an intermediate slider is slid in the middle via a spring, a part of the intermediate slider attached to the lock substrate on which the vertical guide frame is located protrudes laterally. a horizontal support shaft mounted on a lower part of the cover member; a switch operating arm for locking the intermediate slider coaxially mounted on the horizontal support shaft; A heating cooking device comprising a door lock release member configured to push up a vertical slider.