JPH01291020A - Cooker - Google Patents

Abstract

PURPOSE:To make it simpler and speedier to open the door when a cooker is off by providing, for opening the door, a means for disengaging a hook by means of electromotion and also a hand-operated means for disengaging the hook mechanically. CONSTITUTION:When the door 2 is closed, hooks 11a, 11b enter the main body 1; as the hooks 11a, 11b make their entrance, the forward bent part of each of them slides up a slanting face of a respective catch 13a, 13b. At a lock support plate 13 and close to a push lever 14 is provided a motor 16 with a cam 17 attached to its rotary shaft. A connecting lever 12 is long in shape, extending to the bottom of the door 2, and has the lower part bent in the form of the letter L to serve as a jig 30 inserted. An opening 2a is formed at the position corresponding to that of the jig holder 12a; this opening 2a is for inserting the jig 30 and has a diameter L which is smaller than a human finger so as not to allow the finger to slip in. The jig 30 is attached to the main body 1 at an appropriate position and designed to be moved on and off therein.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cooking appliance in which a door of a heating chamber is electrically opened.

(Prior Art) In a cooking device such as a microwave oven, as shown in Japanese Patent Publication No. 59-8724, a touch-type key is provided on the operation section, and the door of the heating chamber is opened in response to the touch operation of the key. There is one that opens electrically.

(Problem to be solved by the invention) However, in the case of such a microwave oven, it is impossible to open the door when the power is off, so if a power outage occurs, it may become impossible to take out the food in the heating chamber, or customers may However, there are disadvantages such as not being able to see inside the heating chamber.

Furthermore, when inspecting, repairing, or adjusting the door switch during maintenance service, it is common to turn off the power for safety reasons, which makes it impossible to open the door, which complicates the work.

This invention was made in view of the above circumstances,
The purpose of this is to make it possible to open the door not only when the power is on, but also when the power is off.This makes it possible to take out food during a power outage, check the heating room while displaying it in a store, and also make it easier for maintenance services. To provide a cooker that allows easy inspection and repair and door switch adjustment.

Another object of the present invention is to provide a cooker whose door can be opened reliably and smoothly when energized.

Another object of the present invention is to provide a cooking appliance whose door can be easily opened when electricity is not supplied.

Another object of the present invention is to provide a cooking appliance that allows the door to be opened easily and quickly when electricity is not supplied.

[Structure of the Invention] (Means for Solving the Problems) The cooking appliance of claim 1 includes a door that closes the heating chamber, a hook provided on the door that engages with the main body when the door is closed, and a door that opens the door. A means for electrically disengaging the hook during operation, and a means for mechanically disengaging the hook in response to an external operation are provided.

In the cooking device according to claim 2, the means for electrically disengaging the hook includes a motor, a cam attached to the rotating shaft of the motor, and a pin provided on the cam.
The cooker according to claim 3, further comprising a push lever that moves the hook in response to push-up of the pin, the push lever is connected to the bottom of the door as means for mechanically disengaging the hook. a connecting lever that extends to the bottom of the door, and an opening formed at the bottom of the door;
5. The cooking appliance according to claim 4, further comprising a jig for pushing up the connecting lever through the opening, the means for mechanically disengaging the hook is a jig that connects with the hook and extends to the bottom of the door. The door comprises a connecting lever, an opening formed at the bottom of the door, and a suppressing button provided at the lower end of the connecting lever and facing the opening.

(Function) In the cooking appliance of the first aspect, the door can of course be opened when electricity is applied, and even when electricity is not applied, the door can be opened by an external operation.

In the cooking device according to the second aspect, when the motor operates, the cam rotates and the pin pushes up the push lever. When the push lever moves upward, the hook is pushed up, the hook disengages from the main body, and the door opens.

In the cooking device according to the third aspect, when the jig is inserted into the opening of the door and pushed up, the connection lever is raised.

When the connection lever rises, the hook is pushed up, the hook disengages from the main body, and the door opens.

In the cooking device of the fourth aspect, when the pressing copper is pushed up with a finger, the connecting lever is raised. When the connecting lever rises,
The hook is pushed up, the hook disengages from the main body, and the door opens.

(Example) Hereinafter, a first example of the present invention will be described with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a main body of a microwave oven, which includes a heating chamber (not shown) inside and a door 2 on the front side for closing the heating chamber.

The door 2 is pivoted on one side so as to be freely openable and closable, and has an operation display section 3 at the top. This operation display section 3 includes touch-type cooking condition setting keys 4. Door oven key5. and a display 6.

The door lock mechanism shown in FIGS. 3 and 4 is constructed.

That is, a pair of hooks 11a and 11a are provided on the non-pivot side of the door 2.
lb is rotatably provided. These hooks are connected by a connecting lever 12, and a spring 10 is stretched between the connecting lever 12 and the lower part of the door 2.

In other words, downward rotational force is constantly applied to the hooks 11a and llb.

A lock base plate 13 is provided on the main body 1 side, and inclined engagement pieces 13a and 13b are formed on the lock base plate 13 at positions corresponding to the hooks lla and llb.

That is, when closing the door 2, the hook 11a.

1, 1b invades into the main body 1. Intruded hook 11
In a and llb, the bent portion at the tip is the engagement piece 13a.

While sliding on the inclined surface of spring 13b,
The engaging piece 13a rotates upward while resisting a biasing force of 0.
, 13b. Hook lla passed by,
Ilb is now rotated downward by the biasing force of the spring 10, and its bent portion engages with the upper edges of the engagement pieces 13a and 13b. This keeps the door 2 open.

Further, a push lever 14 is provided on the lock board 13 near the engaging piece 13a, and a first door switch (micro switch) 15 is provided next to the push lever 14.

The push lever 14 is connected to the hook lla when the door 2 is closed.
, and rotates downward to press the actuator of the first door switch 15 .

Further, the push lever 14 rotates upward in response to being pushed up by a pin 18, which will be described later, and functions to push up the hook 11a.

Further, in the lock board 13, the push lever 14
A motor 16 is provided near the motor 16, and a cam 17 is attached to the rotating shaft of the motor 16. A protrusion 17a for position detection is formed on the circumferential surface of the cam 17, and a pin 1 is provided on the front surface.
8 are erected.

A cam position detection switch (microswitch) 19 is provided on the motor 16 so as to be in sliding contact with the circumferential surface of the cam 17.

That is, when the motor 16 operates, the cam 17 rotates to the left, and the pin 18 pushes up the push lever 14.

A lever 20 and a door monitor switch (microswitch) 21 are provided on the top of the lock board 13.

The lever 20 is displaced under the pressure of the hook lla when the door 2 is closed, and presses the actuator of the door monitor switch 21.

Further, a second door switch (micro switch) 22 is provided at the bottom of the lock board 13.

The actuator of the second door switch 22 is pressed by the hook 11b when the door 2 is closed.

By the way, the connecting lever 12 has a longitudinal shape extending to the bottom of the door 2, as shown in FIGS. 1 and 5.

As shown in FIG. 6, the lower part is bent into an L-shape to form a jig receiver 12a. These jig receivers 1 and 2a are
It has a curved surface to easily receive insertion of a jig 30, which will be described later. An opening 2a is formed in the bottom of the door 2 at a position corresponding to the jig receiver 12a of the connection lever 12.

The opening 2a is for inserting the jig 30, has a diameter smaller than the thickness of a human finger, and is designed to prevent the finger from entering. Note that the jig 30 is removably attached to a predetermined location on the main body 1.

The control circuit is shown in FIG.

40 is a commercial AC power supply, and one end of the power supply 40 has a fuse 41. Magnetron thermal 42. and the primary coil 43a of the high voltage transformer 43 via the first door switch 15.
One end of is connected. - The other end of the secondary coil 43a is connected to the power source 4 via the second door switch 22 and the relay contact 51a.
Connected to the other end of 0.

A secondary coil 43b of the high voltage transformer 43 is connected between the anode and cathode of a magnetron 46 via a half-wave voltage doubler rectifier circuit consisting of a high voltage capacitor 44 and a high voltage diode 45. The anode of the magnetron 46 is grounded, and the heater (cathode) is connected to the secondary coil 43c of the high voltage transformer 43.

In addition, a fuse 41. Magnetron thermal 42. One end of the motor 16 is connected via the first door switch 15, and the other end of the motor 16 is connected to the other end of the power source 40 via the relay contact 52a.

Furthermore, a fuse 41. Magnetron thermal 42. One end of the door monitor switch 21 is connected via the first door switch 15, and the other end of the door monitor switch 21 is connected to the other end of the power source 40 via a resistor 47.

On the other hand, a primary coil of a step-down transformer 48 is connected to a power source 40 via a fuse 41 and a magnetron thermal 42, and a microcomputer 50 is connected to the secondary coil.

The microcomputer 50 performs overall control of the microwave oven, and has relays 51 and 52, a cam position detection switch 19, and an operation display section 3 connected to the outside.

Next, the operation in the above configuration will be explained.

The food is placed in the heating chamber and the door 2 is closed. Then, 7
ylilla and llb are the engagement pieces 13a.

13b, and the closed state of the door 2 is maintained.

At this time, the hook lla presses the actuator of the door monitor switch 21 via the lever 20, and
The hook 11b presses the actuator of the second door switch 22. Furthermore, hook lla is connected to push lever 1.
4, and the push lever 14 presses the actuator of the first door switch 15.

That is, the first door switch 15 and the second door switch 22 are turned on, and the door monitor switch 21 is turned off.

Then, desired cooking conditions are set using the cooking condition setting key 4 of the operation display section 3, and cleaning is started to start cooking.

Then, the microcomputer 50 energizes the relay 51. When the relay 51 is energized, the contact 51a is turned on and the magnetron 46 operates in oscillation.

When the magnetron 46 oscillates, high-frequency radio waves are supplied into the heating chamber, and cooking begins.

When the cooking condition setting key 4 is used to complete cooking, the microcomputer 50 deenergizes the relay 51. When the relay 51 is deenergized, the contact 51a is turned off and the oscillation operation of the magnetron 46 is stopped.

In other words, cooking is finished.

At the end of this cooking, when the user touches the door oven key 5 to take out the food, the microcomputer 50 energizes the relay 52. Then, the contact 52a turns on,
Motor 16 operates.

When the motor 16 operates, the cam 7 rotates and the pin 8 pushes up the pushin lever 14. In this way, when the push lever 14 rotates upward, the hook lla is pushed up and rotates upward, and the hook 11a and the engagement piece 13a
The connection will be removed. At this time, the hook 11b also rotates upward due to the action of the connecting lever 12, and the hook ll
b is disengaged from the engagement piece 13b.

When the hooks lla and llb are disengaged, the door 2 is immediately opened by the biasing force of a spring (not shown).

In this case, the microcomputer 50 detects the rotational position of the cam 7 using the switch 19, and deenergizes the relay 52 when the cam 7 has rotated once, thereby stopping the operation of the motor 16.

In this way, the door 2 can be opened reliably and smoothly.

By the way, when the power is off, such as during a power outage or when the door is on display at a store, the motor 16 does not operate even if the door open key 5 is touched, and the door 2 does not open.

In this case, as shown in FIG.
Insert the letter-shaped jig 30 and push it upward. Then, the coupling lever 12 receives the pushing up force, and the coupling lever 12 rises.

When the connecting lever 12 rises, the hook 11a.

11b rotates upward together, and its hook 11a.

11b and the engagement pieces 13a, 13b are disengaged.

At the same time as this engagement is released, the door 2 opens.

In this way, since the hooks lla and llb can be mechanically disengaged by external operation using the jig 30, the door 2 can be easily opened even during a power outage, and the heating chamber can be opened easily. of food can be taken out reliably, making it highly user-friendly.

It is safe to clean the inside of the heating chamber with the power plug unplugged from the outlet.

Even when it is on display at a store, the door 2 can be opened freely to see inside the heating chamber.

Inspection and repair during maintenance service and door switch adjustment can be easily performed.

Since the diameter of the opening 2 is made smaller than the thickness of the finger, there is no possibility that the finger will get stuck in the opening 2 and be injured.

Since the jig receiver 12a having a curved surface is provided at the lower part of the connecting lever 12, the tip of the jig 30 can be reliably brought into contact with the connecting lever 12.

Next, a second embodiment of the present invention is shown in FIGS. 8 to 10.

In this embodiment, the bottom of the door 2 is divided into upper and lower sections with a larger wall thickness on the lower side, an opening 2al 2a2 is formed in the lower part, and the connecting lever 12 is This embodiment is different from the first embodiment in that a pressing copper 60 is attached to the lower end and the pressing copper 6o faces the openings 2a1 and 2a2, but the rest is the same.

That is, the connecting lever 12 extends to the bottom of the door 2, and a pressing copper 60 is attached to the lower end thereof. Then, the suppressing copper 6o enters the openings 2a2 and 2al,
The lower surface is located slightly inside the opening surface of the opening two a1.

Further, as shown in detail in Figure '1s10, the opening 2al is formed by cutting out the edge of the door 2 in a U-shape, and has an inner circumferential surface K that expands downward in an inclined manner. .

The pressing copper 60 and the opening 2al are sized so that a human fingertip can easily fit therein.

Explain the operation.

A fingertip is placed on the opening 2al and the pressing copper 60, and the pressing copper 60 is pushed up with the finger. Then, the push-up force is applied to the connecting lever 1.
2 receives it, and its connecting lever 12 rises.

When the connecting lever 12 rises, the hook 11a.

11b rotates upward together, and its hook 11a.

11b and the engagement pieces 13a, 13b are disengaged.

At the same time as this engagement is released, the door 2 opens.

In this way, since the hooks lla and llb can be disengaged using fingers, the door 2 can be easily opened even during a power outage, and the food in the heating chamber can be reliably taken out.

In particular, since no jig is required as in the first embodiment, anyone can quickly open the opening. In addition, the support legs of the main body 1 are not very high, and the gap between the bottom of the door 2 and the mounting table is narrow, so when using the jig, it may not be possible to secure enough operating space, but it can be operated using the fingertips. There are no such inconveniences and it is very convenient.

Furthermore, since the suppressing copper 60 penetrates slightly deeper than the opening surface of the opening 2aH, it is easy to press the fingertip against the pressing copper 60, and furthermore, it prevents an erroneous operation such as pulling the pressing copper 60. be able to. Furthermore, since the pressing copper 60 is difficult to see from the outside, the design does not look unsightly at all.

Furthermore, since the inner circumferential surface K of the opening 2a1 expands in an inclined manner, it is easy to insert the fingertip during pressing, and the pressing can be performed reliably from beginning to end. Moreover, it does not hurt the fingertips when pressing.

In each of the above embodiments, a motor is used as the drive source, but there are also some that use electromagnetic valves, and the embodiments can be implemented in the same manner.

[Effects of the Invention] As described above, the cooker of claim 1 includes a door that closes the heating chamber, a hook that is provided on the door and engages with the main body when the door is closed, and an electric Since we have provided a means for disengaging the hook according to the operation and a means for mechanically disengaging the hook in response to an external operation, the door can be opened not only when energized, but also when the door is not energized. This makes it possible to open the heating chamber during a power outage and to check the inside of the heating chamber while it is on display at a store when taking out food during a power outage.Furthermore, inspection and repair during maintenance service and adjustment of the door switch can be easily performed.

In the cooking device according to claim 2, the means for electrically disengaging the hook includes a motor, a cam attached to the rotating shaft of the motor, and a pin provided on the cam.
Since we adopted a push lever that moves the hook in response to the push up of this pin, the door opens reliably and smoothly when electricity is applied.

In the cooker according to claim 3, the means for mechanically disengaging the hook includes a connecting lever connected to the hook and extending to the bottom of the door, and an opening formed in the bottom of the door.
Since a jig for pushing up the connection lever through this opening is adopted, the door can be easily opened when the power is not supplied.

In the cooker according to claim 4, the means for mechanically disengaging the hook includes a connecting lever connected to the hook and extending to the bottom of the door, and an opening formed in the bottom of the door.
Since a suppressing copper provided at the lower end of the connecting lever and facing the opening is adopted, the door can be opened easily and quickly when no electricity is applied.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of essential parts in a first embodiment of the present invention, FIG. 2 is a perspective view showing the external appearance of the same embodiment, and FIGS. 3 and 4 are door locks in the same embodiment, respectively. 5 is a perspective view showing the structure of the connecting lever in the same embodiment; FIG. 6 is a cross-sectional view taken along line A-A in FIG. 5; FIG. FIG. 9 and FIG. 10 are diagrams specifically showing the structure of the pressing button and its surrounding area in the same embodiment. 1...Body, 2...Door, 2a...Opening, 5...
・Door oven key, lla, llb...hook, 1
2... Connection lever, 16... Motor, 30... Jig, 50... Microcomputer, 60... Pressing button. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (4)

[Claims] (1) A door that closes the heating chamber, a hook provided on the door that engages with the main body when the door is closed, a means for electrically disengaging the hook when the door is opened, and a means that can be operated from the outside. A cooking appliance characterized by comprising means for mechanically disengaging the hook by receiving the hook. (2) The means for electrically disengaging the hook consists of a motor, a cam attached to the rotating shaft of the motor, a pin provided on the cam, and a pusher that moves the hook when pushed up by the pin. The cooking device according to claim 1, comprising a lever. (3) The means for mechanically disengaging the hook includes a connecting lever connected to the hook and extending to the bottom of the door, an opening formed in the bottom of the door, and a mechanism for pushing the connecting lever through the opening. The cooking device according to claim 1 or 2, comprising: (4) The means for mechanically disengaging the hook is provided in a connecting lever that connects with the hook and extends to the bottom of the door, an opening formed in the bottom of the door, and a lower end of the connecting lever. The cooking appliance according to claim 1 or 2, further comprising a pressing button facing the opening.