JPH0439524A - Device for opening-closing toaster door in microwave oven with toaster - Google Patents

Abstract

PURPOSE:To set up a device for opening and closing the toaster door in a microwave oven with a toaster, which enables opening and closing the toaster door without using a handle, by providing a means of detecting closure of a toaster door, a means of driving the toaster door, and a means of controlling the toaster door. CONSTITUTION:When a button for opening-closing the toaster door is pressed as required while a limit switch 12 is ON, a microcomputer 15 actuates a synchronous motor 11 for a first specified time so as to move a toasting net to the front; when the toasting net reaches the front position, the toaster door is opened and the toasting net is automatically stopped. When the button for opening-closing the toaster door is pressed as required while the limit switch 12 is OFF, the synchronous motor 11 is actuated to reverse the toasting net; when the toasting net reaches the back position, the toasting door is closed and the limit switch 12 is turned ON and one second later the synchronous motor 11 is stopped. The toaster door 4 can be opened or closed automatically by pressing of the button for opening-closing the toaster door, and safely even when the toaster door is hot.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a toaster door opening/closing device for opening and closing the door of a toaster section in a microwave oven equipped with a toaster.

[Conventional technology]

There are toaster ovens on the market that function as both an oven and a toaster. However, this toaster oven has a drawback in that when used as an oven, the internal volume is small and large objects cannot be cooked. Furthermore, when used as a toaster, the internal volume is too large, resulting in poor heating efficiency. In other words, the toaster oven can be said to be a product that does not meet the needs of users. Therefore, in recent years, in order to meet the above-mentioned user demands, a microwave oven with a toaster has appeared, which combines a microwave oven and a toaster.

[Problem to be solved by the invention]

In most of the above-mentioned microwave ovens with a toaster, the door of the toaster section (hereinafter referred to as the toaster door) is manually operated. However, in the toaster section, there is a problem in that the toaster door is at a high temperature when toast is finished, and if you touch it with your hands, you may get burned. Furthermore, if a handle is added to solve the above problem, another problem arises in that the design becomes unsightly. SUMMARY OF THE INVENTION An object of the present invention is to provide a toaster door opening/closing device for a microwave oven equipped with a toaster that can open and close the toaster door of the microwave oven equipped with a toaster without using the handle.

[Means to solve the problem]

In order to achieve the above object, a toaster door opening/closing device for a microwave oven with a toaster according to the present invention includes a toaster door that opens and closes a heated object insertion opening of a toaster part in a microwave oven with a toaster, and a toaster door closing device that detects that the toaster door is closed. a detection means, a toaster door drive means for driving the toaster door, and a toaster door drive means for controlling the toaster door drive means so that the toaster door opens when the toaster door is opened, and until the toaster door closure detection means detects that the toaster door is closed when the toaster door is closed; The toaster door is characterized by comprising a control means for controlling the toaster door driving means so as to close the toaster door. Further, in the toaster door opening/closing device of the microwave oven with a toaster, the toaster door closing detection means is configured with a limit switch, and the control means controls the toaster door driving means so that the toaster door driving means operates for a predetermined time when the toaster door is opened. It is characterized by

[Effect]

When the toaster door is opened, based on the control of the control means,
A toaster door that opens and closes a heated object insertion port of a toaster section in a microwave oven with a toaster is opened by a toaster door driving means. On the other hand, when the toaster door is closed, the toaster door is closed by the toaster door drive means under the control of the control means until the closure of the toaster door is detected by the toaster door closure detection means. In this way, the toaster door opens and closes automatically. Further, the toaster door closure detection means in the toaster-equipped microwave oven is constituted by a limit switch, and the toaster door drive means is controlled by the control means so that the toaster door drive means operates for a predetermined time when the toaster door is opened. Therefore, the toaster door can be opened and closed appropriately by controlling the control means using one limit switch.

【Example】

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments. FIG. 1 is an external view of a microwave oven with a toaster according to the present invention. This toaster-equipped microwave oven is configured so that heating operations can be performed simultaneously in the range section 1 and the toaster section 2 by operating the operation panel 3. and,
The toaster part 2 is disposed below the toaster part 1 after it is used, and is compactly constructed by keeping its height extremely low. The toaster part 2 is not provided with a handle for opening and closing the toaster door 4 after its arrangement and use. That is, the toaster door 4 is automatically opened and closed by pressing the toaster door opening/closing button 5. On the other hand, the range door 6 is opened and closed by pressing the range door opening/closing button 7. FIG. 2 is a block diagram of a toaster door opening/closing device that automatically opens and closes the toaster door 4. As shown in FIG. The toast grid 8 is a part on which objects to be heated such as bread are placed when toasting, and is usually large enough to hold two pieces of bread side by side. This toast grid 8 is designed to slide in the front-rear direction, and when the toaster door 4 is in an open state, it protrudes approximately 100 mm forward from the front surface of the toaster part 2, making it easy to place the object to be heated. The toaster door 4 is attached to the front edge of the toast grate 8 perpendicularly to the surface of the toast grate 8, and when the toast grate 8 slides to a completely retracted position (hereinafter referred to as the retracted position), the toaster door 4 The toast mesh insertion opening 9 is closed to form a part of the front surface of the toaster section 2. Therefore, when the toast grid 8 is slid forward, the toaster door 4 automatically opens. A limit switch 12 is installed below the range section I and at the back of the toaster section 2 to detect when the synchronous motor 1 with the lever IO attached to the rotating shaft 11a and the toast net 8 have reached the retreat position. are doing. The above lever 10
An elongated hole 10a is provided at the tip of the elongated hole 10a.
Insert the pin 14 provided at the end of the protrusion 13 that protrudes rearward from the center of the rear edge of the toast net 8, and then press the lever I.
0 and the protrusion 13 are rotatably connected. Therefore, as the lever IO rotates as the synchronous motor 11 rotates, the toast net 8 slides in the direction of the arrow. A cam 11b is attached to the outer periphery of the rotating part of the synchronous motor 11, and when the toasting net 8 reaches the retracted position with the rotation of the lever 10, the cam llb moves against the limit switch 12.
The limit switch 12 is turned on by pressing the knob 12a. The rotation speed of the synchronous motor 11 has a characteristic that it is proportional to the frequency of the applied power supply. Therefore, in this embodiment, the above characteristics are utilized to control the toasting net 8 to stop at the fully extended position (hereinafter referred to as the forward position). That is, the time required for the toast net 8 to come out completely at each frequency such as 50 Hz or 60 Hz is determined, and the synchronous motor 11 is rotated for this amount of time. By doing this, the toast net 8 can be stopped at the forward position in any region of Japan. Hereinafter, it is assumed that the toaster door 4 is completely closed when the toast grid 8 is in the retracted position, while it is assumed that the toaster door 4 is completely open when the toast grid 8 is in the forward position. . As described above, in this embodiment, the limit switch 12 constitutes the toaster door closure detection means, and the synchronous motor 11 constitutes the toaster door driving means. FIG. 3 is a circuit diagram for controlling the opening and closing of the toaster door 4, and FIG. 4 is a flowchart of the toaster door opening/closing processing operation based on the control of the microcomputer 15 as the control means in FIG. Hereinafter, the toaster door opening/closing operation will be described in detail with reference to FIGS. 3 and 4. In step S1, it is determined whether or not the toaster door opening/closing button 5 has been pressed. As a result, if it is pressed, the process advances to step S2, and if not, it waits until the toaster door opening/closing button 5 is pressed. In step S2, it is determined whether the limit switch 12 is "on". If the result is "on", the process advances to step S3; if the result is "off", the process advances to step S6. In step S3, the fact that the limit switch I2 is "on" means that the toast grid 8 is in the retracted position and the toaster door 4 is completely closed. Therefore, pressing the toaster door opening/closing button 5 is determined to be an instruction to open the toaster door. Then, the synchronous motor II is driven to open the toaster door 4. The synchronous motor 11 is driven as follows. That is, in FIG. 3, a synchronous motor drive signal is output from the output terminal 16 of the microcomputer 15. Then, transistor 17 turns on and RM relay 18
is turned on, and the synchronous motor 11 is driven. At this time, the synchronous motor 11 is designed to reverse rotation if it hits an obstacle during rotation. Therefore, if the toast net 8 or the lever 10 is made to hit an obstacle such as a protrusion when the toast net 8 is in the retracted position or the forward position, the toast net 8 will When the toaster door opening/closing button 5 is pressed, the toast net 8 starts to move forward, while if it is stopped at the forward position, it starts to move backward. In step S4, a first predetermined period of time (for example, 6 seconds in the case of 50 Hz, 6 seconds in the case of 50 Hz,
In the case of Hz, it is determined whether or not 5 seconds have elapsed. As a result, if the elapsed time has elapsed, the process proceeds to step S5, and if the elapsed time has not elapsed, the process returns to step S3 and continues to drive the synchronous motor 11 until the first predetermined time elapses. In step S5, since the toaster door 4 is opened after the elapse of time from when the toast net 8 starts moving forward until it reaches the forward position, the synchronous motor 11 is stopped and the toaster door opening/closing processing operation is completed. Here, the synchronous motor 11 is stopped as follows. That is, in FIG. 3, when the first predetermined time period elapses after the toast net 8 starts moving, the output of the synchronous motor drive signal from the microcomputer 15 is stopped. Then, the RM relay 18 turns "off" and the synchronous motor II stops. In that case, as described above, the toast grid 8 is in the forward position, so the toast grid 8 or the lever 10 hits an obstacle, and the next press of the toaster door opening/closing button 5 causes the toast grid 8 to begin to retreat. In step S6, the limit switch 12 is "off", which means that the toast grate 8 is in the forward position and the toaster door 4 is completely open. Therefore, pressing the toaster door opening/closing button 5 is determined to be an instruction to close the toaster door. Then, in order to close the toaster door 4, the synchronous motor 11 is driven as described above. In step S7, it is determined whether the limit switch 12 is "on". If the result is "on", the process advances to step S8; if the result is "off", the process advances to step S9. In step S8, since the limit switch I2 is "on", it is determined that the toast grid 8 has reached the retracted position and the toaster door 4 is closed. Then, one second later, the synchronous motor 11 is stopped and the toaster door opening/closing operation is completed. Here, it is the synchronous motor that stops the synchronous motor II one second after the limit switch 12 is turned on.
This is to protect the toaster door 4 and to ensure that the toaster door 4 is closed. For this reason, the actual installation of the cam Ilb for pressing the knob 12a of the limit switch 12 is at a position corresponding to one second before the time when the toast net 8 reaches the retracted position. In step S9, a second predetermined time that is longer than the first predetermined time required for the toast net 8 to retreat from the forward position to the backward position is determined.
It is determined whether a predetermined period of time (for example, 15 seconds at most) has elapsed. As a result, if the elapsed time has elapsed, the process advances to step SIO; if the elapsed time has not elapsed, the process returns to step S6 to continue driving the synchronous motor 11. In step S10, since a time longer than the first predetermined time, which is the time required for the toast net 8 to retreat, has elapsed, it is determined that the limit switch 12 or the control circuit is malfunctioning. Ru. Therefore, the synchronous motor 11 is forcibly stopped and the toaster door opening/closing operation is completed. As mentioned above, in this embodiment, the toaster door 4 is attached to the front end of the toast grate 8 on which the object to be heated is placed.
The toaster door 4 or the toast mesh insertion port 9 is closed when the toast grid 8 is in the retreated position. By the rotation of the synchronous motor II, the toast net 8 is caused to slide between the forward position and the backward position via the lever 10. When the toast grid 8 is in the retracted position, the limit switch I2 is turned on to notify the microcomputer 15 that the toaster door 4 is closed. When the toaster door opening/closing button 5 is pressed and the limit switch 12 is "on", the microcomputer 15 drives the synchronous motor II for a first predetermined time to advance the toast grid 8 to the forward position. When you reach (i.e.
When the toaster door 4 is opened), the toaster door 4 is automatically stopped. On the other hand, when the toaster door open/close button 5 is pressed and the limit switch 12 is "off", the synchronous motor II is driven to retract the toast net 8 and reach the retracted position (that is, the toaster door 4 is When the limit switch 12 (closed) is turned on, the synchronous motor 11 is stopped one second later. Therefore, the toaster door 4 in the microwave oven with a toaster can be automatically opened and closed by pressing the toaster door opening/closing button 5, and can be safely opened and closed even if the toaster door 4 is at a high temperature when toast is finished. Further, in this case, there is no need to provide a handle on the toaster door 4, and a good design of the microwave oven with a toaster can be obtained. Furthermore, when the toast grid 8 is retracting, if the limit switch 12 is not turned on (that is, the toaster door 4 is not closed) even after a second predetermined time period that is longer than the time required for the toast grid 8 to retract, , synchronous motor 11
The drive is forcibly stopped. Therefore, even if the limit switch 12 or the control circuit breaks down, the synchronous motor 11 can be stopped immediately. In the embodiment described above, the synchronous motor 11 is stopped at the forward position of the toast grid 8 (the open position of the toaster door 4) depending on the elapsed time after the synchronous motor 11 is driven. However, the present invention is not limited to this, and the retracted position of the toasting net 8 (
Synchronous electric s! in the closed position of the toaster door 4)! 11
As in the case of stopping, this may be done by a limit switch. However, in that case, two limit switches are required, so it can be said that the above embodiment is more advantageous in terms of cost. In the above embodiment, the toaster door 4 is connected to the toast net 8.
is provided perpendicularly to the surface of the toast net 8 at the front edge thereof, and moves together with the toast net 8 to open and close the toast net insertion opening 9. However, the invention is not limited thereto. For example, attach the toaster door to the upper edge or lower edge of the toast mesh insertion slot 9 with hinges,
It is closed and biased by a spring or the like. The toaster door may be pushed open by the front surface of the toast grill 8 when the toast grill 8 moves forward, and closed by the urging horn of the spring when the toast grill 8 reaches the retreat position.

【Effect of the invention】

As is clear from the above, the toaster door opening/closing device for a microwave oven with a toaster according to the present invention is configured so that when the toaster door is opened, the toaster door opens, and when the toaster door is closed, until the toaster door closure detection means detects that the toaster door is closed. Since the toaster door driving means is controlled by the control means so as to close the toaster door, the toaster door can be automatically opened and closed without using the handle. Therefore, according to this invention, there is no risk of burns even if the toaster door is at a high temperature when toast is finished.
Moreover, it is possible to obtain a good design as a microwave oven with a toaster. Further, in the toaster door opening/closing device of the microwave oven with a toaster, the toaster door closing detection means is configured with a limit switch, and the control means controls the toaster door driving means to operate for a predetermined period of time when the toaster door is opened. , it is possible to accurately open and close the toaster door with one limit switch. Therefore, it is possible to provide a toaster door opening/closing device for an electronic lens with a toaster, which is cost-effective and first-of-its-kind.

[Brief explanation of drawings]

Fig. 1 is an external view of a microwave oven with a toaster according to the present invention, Fig. 2 is a block diagram showing an embodiment of the toaster door opening/closing device of the invention, Fig. 3 is a circuit diagram for opening/closing the toaster door, and Fig. 4 is a flowchart of the toaster door opening/closing processing operation. l...Range part, 2...Toaster part, 4...Toaster door, 5...Toaster door opening/closing button, 8...Toast net, IO...Lever 11...Synchronous motor, Ilb...Cam, 1
2...Limit switch, I5...Microcomputer, 1
8...RM relay

Claims (2)

[Claims] (1) A toaster door that opens and closes a heating object insertion port of a toaster part in a microwave oven with a toaster, a toaster door closure detection means that detects when the toaster door is closed, a toaster door driving means that drives the toaster door, and when the toaster door is opened. Control means for controlling the toaster door driving means so that the toaster door opens, and controlling the toaster door driving means for closing the toaster door until the toaster door closure detection means detects that the toaster door is closed when the toaster door is closed. A toaster door opening/closing device for a microwave oven equipped with a toaster. (2) In the toaster door opening/closing device for a microwave oven equipped with a toaster according to claim 1, the toaster door closure detection means is constituted by a limit switch, and the control means is configured to operate the toaster door driving means for a predetermined time when the toaster door is opened. A toaster door opening/closing device for a microwave oven equipped with a toaster, characterized by controlling a toaster door driving means.