JPS6328321Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a cooking device, and particularly to a cooking device equipped with a cooking timer that is driven by a single drive source and has a normal timer function and a repeat timer function. Regarding.

[Technical background of the invention and its problems]

BACKGROUND ART In cooking devices such as microwave ovens and electric ovens, particularly in commercial cooking devices, the same cooking process is often performed repeatedly. Therefore, in order to save the trouble of setting a timer every time cooking, this type of cooking device is equipped with a regular timer a, as shown in Fig. 1.
In addition, a repeat timer b is provided,
These timers a and b are selected by the timer selection switch c.
I use it by switching depending on the situation. however,
The timer a and the repeat timer b are driven by separate drive motors and deceleration mechanisms, which inevitably increases costs and increases the size of the device. Furthermore, since timer a and repeat timer b are placed on operation panel d, the space for attaching other parts (for example, a defrost timer for a microwave oven, etc.) to operation panel d is limited, and there are many restrictions in terms of product design and specifications. It was.

[Purpose of invention]

The present invention was devised to effectively solve the above conventional problems, and the purpose of the present invention is to provide a cooking timer with a timer function and a repeat timer function that are driven by the same drive source. Therefore, it is an object of the present invention to provide a cooking device that can be manufactured inexpensively and compactly, has a large degree of freedom in design, is easy to handle, and is convenient to use.

[Example of idea]

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. This example shows an example applied to a microwave oven.

In FIG. 2, 1 is a microwave oven that performs high-frequency heating cooking, and a casing 2 of the microwave oven 1
An operation panel 3 and an opening/closing door 4 for taking food into and out of the casing 2 are provided on the front surface. As shown in FIGS. 2 and 3 in an enlarged manner, the operation panel 3 includes a timer knob 5 for setting the cooking time, a timer function selection button 6 for switching the function between the timer and repeat timer, and a button for selecting the repeat timer. A reset button 7 for returning the timer to the first set cooking time position and a cooking start button 8 for starting high frequency heating cooking are provided.

As shown in FIG. 4, the timer knob 5 is attached to the tip of a timer shaft 9 that is rotatably provided through the operation panel 3. Further, a bevel gear 10 is attached to the base end of the timer shaft 9, and a timer switch 11 is turned on and off as shown in FIGS. 4 and 5.
A cam 12 for turning off is integrally molded.
The cam 12 has a disc shape with a groove 13 formed on its side surface, and a protrusion 11a of the timer switch 11.
However, as shown in Fig. 4, when the timer switch 11 is inserted into the groove 13, the timer switch 11 is opened, and as the cam 12 rotates, the protrusion 11a comes out from the groove 13 along the side of the cam 12, and when it is pushed from the side of the cam 12, the timer switch 11 is opened. 11 is now closed.

A repeat bevel gear 14 as a repeat member is rotatably attached to the timer shaft 9 between the timer knob 5 and the bevel gear 10. Further, a return spring 15 is interposed between the repeat bevel gear 14 and the bevel gear 10, which regulates the relative rotation of the repeat bevel gear 14 with respect to the bevel gear 10 with respect to the timer shaft 9 by its restoring force (tensile force). It is set up. The end portion 6a of the timer function selection button 6 is formed into a bevel tooth shape that meshes with the repeat bevel gear 14; This serves as a stopper member that can stop the rotation of the repeat bevel gear 14. Furthermore, the timer function selection button 6 is a push-on button found on a power switch.
It has a push-off lock mechanism and lock release mechanism.

On the other hand, in order to return the timer shaft 9, which is rotated clockwise by the timer knob 5 from the initial position "0" of the time scale on the operation panel 3 to a desired set cooking time position (for example, "5"), to the initial position in a counterclockwise direction, a timer shaft drive system is connected to the bevel gear 10. The timer shaft drive system is a transmission shaft 16 provided in parallel to the timer shaft 9.
and a bevel gear 1 attached to the tip of the transmission shaft 16.
The bevel gear 17 meshes with the bevel gear 10, a gear 18 attached to the end of the transmission shaft 16, a gear 19 meshes with the gear 18, a timer motor 20 connected to the gear 19 and driving it, and a spring 21 interposed between the gear 18 and a support plate 21 that supports the transmission shaft 16 while allowing it to move in the axial direction, and biases the transmission shaft 16 in the direction of the arrow A in the figure (towards the operation panel 3) and meshes and connects the bevel gear 17 and the bevel gear 10.
The end 7a of the reset button 7 is extended in a rod shape toward the transmission shaft 16, and the reset button 7 is connected to the operation panel 3.
By pressing it to the side, the meshing between the bevel gear 17 and the bevel gear 10 can be released. Incidentally, Fig. 6 is a circuit diagram of the microwave oven 1 of this embodiment.

Next, the operation of this embodiment will be described.

First, a case where normal timer cooking is performed will be explained.

Timer function selection button 6 is not pressed.
It is in the OFF position, and as shown in FIG. 4, the end 6a of the timer function selection button 6 is separated from the repeat bevel gear 14 without meshing with it. In this state, turn the timer knob 5 clockwise from the initial position "0" to the set cooking time position to set the cooking time. together with the timer knob 5, the timer axis 9;
The bevel gear 10 and the cam 12 rotate, the timer switch 11 closes, the interior light 23 in the circuit shown in FIG. 6 lights up, and the blower motor 24 is rotationally driven (hereinafter, this state is referred to as a preparation state). .

Next, when the opening/closing door 4 is closed, the door switch 25 is activated.
is closed and the cooking start button 8 is pressed, the relay 26 is energized and contacts 26a, 26b are activated accordingly.
is closed, the microwave oscillation circuit 27 is activated, and microwave cooking is performed. At the same time, the cooking lamp 28 lights up, the timer motor 20 is driven to rotate, and the rotation of the timer motor 20 is controlled by the gear 1.
9, 18, the transmission shaft 16, and the bevel gears 17, 10, the deceleration is transmitted to the timer shaft 9, and the timer shaft 9 starts rotating counterclockwise (hereinafter, this state is referred to as the cooking state).

When the set cooking time has elapsed, the timer shaft 9 returns to the initial position and the groove 1 of the cam 12
3, the projection 11a of the timer switch 11 is recessed, the timer switch 11 is turned off, and the timer switch 11 returns to its initial state. During this time, the repeat bevel gear 14 is not locked by the end 6a of the timer function selection button 6 and is free, but because of the return spring 15, it rotates together with the bevel gear 10 and the timer shaft 9.

Next, the case of repeat timer cooking will be explained.

In this case, after setting the repeat cooking time by turning the timer knob 5, the timer function selection button 6 is pressed to engage the end portion 6a and the repeat bevel gear 14 to fix the repeat bevel gear 14. At this time, the repeat bevel gear 14 is fixed at the set cooking time position, while the bevel gear 10 is placed in a ready state. Next, when the cooking start button 8 is pressed to enter the cooking state, the timer shaft 9 is rotated counterclockwise by the operation of the timer motor 20.
However, since the repeat bevel gear 14 is locked by the timer function selection button 6, it does not rotate, and the timer shaft 9 is provided between the bevel gear 10 and the repeat bevel gear 14 by the driving force of the timer motor 20. It is rotated against the restoring force of the return spring 15. Then, when the set cooking time has elapsed and the timer shaft 9 is returned to the initial position, the timer switch 11 is turned off, returning to the initial state. During this time, the return spring 15 stores elastic energy proportional to the relative rotation between the repeat bevel gear 14 at the set cooking time position and the bevel gear 10 at the initial position.

Therefore, from this state, when the reset button 7 is pressed to compress the spring 22 and move the transmission shaft 16 toward the support plate 21 and separate the bevel gear 17 and the bevel gear 10, the holding force by the timer motor 20 is released. Therefore, the bevel gear 10 and the timer shaft 9 return to the first set cooking time position stored by the fixed repeat bevel gear 14 due to the restoring force of the return spring 15, and the microwave oven 1 is set to the ready state. . Furthermore, when the reset button 7 that has been pressed is released, the transmission shaft 16 is moved to the operating panel 3 by the elastic force of the spring 22.
When the bevel gear 17 and the bevel gear 10 are moved to the side, the bevel gear 17 and the bevel gear 10 mesh again, and when the cooking start button 8 is pressed, the cooking state is entered and cooking is performed for the same set cooking time.

As described above, in the present invention, the timer shaft 9 of a normal timer mechanism is fixed by the repeat bevel gear 14 as a repeat member for memorizing the initial set cooking time position and the timer function selection button 6 as a stopper member. Repeat bevel gear 1
Since a return spring 15 is provided to return the cooking device to position 4, timer cooking and repeat timer cooking can be performed using the same driving source, the timer motor 20, and the repeat timer, which was conventionally required separately, can be omitted. can. Therefore, this type of cooking device can be provided at a low cost, and the device can be made more compact. Furthermore, since a repeat timer is not required, space is freed up on the operation panel 3, and other devices such as a defrosting timer can be installed, increasing the degree of freedom in eliminating restrictions on product specifications and design.
Further, since the only cooking time setting knob on the operation panel 3 is the timer knob 5, handling is easy and errors are eliminated, improving usability.

As shown in FIGS. 7 and 8, a display plate 29 is attached to the sleeve portion 14a of the repeat bevel gear 14 on the operation panel 3 side of the above embodiment, and a display plate 29 is attached to the sleeve portion 14a of the repeat bevel gear 14 on the operation panel 3 side facing the display plate 29. window 3
If 0 is provided, the set cooking time for repeated cooking can be displayed on the display board 29. In this case, the set cooking time can be displayed on the display board 29, and the remaining time can be displayed on the scale position of the timer knob 5.

Furthermore, as shown in FIG. 9, if an arm 31 is attached to the end 7a of the reset button 7 and a cooking start button 8 is provided facing the arm 31, the timer shaft 9 can be reset by pressing the reset button 7. At the same time, the cooking start button 8 can be turned on, simplifying the operation.

Furthermore, it can be constructed as shown in FIGS. 10 to 11 so that opening and closing of the opening/closing door 4 causes the reset button 7 of the above embodiment to be reset at the same time. That is, as shown in FIG. 10, the biasing direction of the transmission shaft 16 by the spring 22 is set in the direction of arrow B, which is opposite to the operation panel 3, contrary to the case of FIG. The power is applied to separate the bevel gear 17, and on the other hand,
The end of the transmission shaft 16 on the side of the gear 18 is fixedly supported by an arm 32, and the bevel gears 17 and 10 are meshed with each other. The arm 32 is rotatably supported by a pivot 32a, and when the door 4 is closed, the end of the arm 32 on the door 4 side is inside the door 4, as shown by the solid line in FIG. The bevel gears 10 and 17 are supported by a support protrusion 33 extending from the wall surface, and the bevel gears 10 and 17 are in mesh with each other. After the repeat timer cooking is complete, casing 2
When the opening/closing door 4 is opened to take out the food inside, the support protrusion 33 is separated from the arm 32 as shown by the chain line in FIG. Move in direction B,
The meshing between the bevel gears 10 and 17 is released, and the restoring force of the return spring 15 causes the bevel gear 10 to return to the initial set cooking time position and be reset.

[Effect of idea]

In summary, according to the present invention, the following excellent effects can be obtained.

In cooking devices equipped with a timer function and a repeat timer function, in addition to the conventional timer, the repeat timer that was required separately can be omitted and the device is driven by a single drive source. can be provided at low cost and can be manufactured compactly.

Also, you can omit the repeat timer, so
Space is created on the operation panel and other parts (defrosting timer, etc.) can be installed, increasing the degree of freedom in product specifications and design.

Furthermore, since only the timer is used without the repeat timer, handling becomes easier and usability is improved.

The repeat timer set cooking time is stored in a repeat member separate from the timer axis, and the timer axis rotates and returns to the initial position of the time scale even during repeat timer cooking, so the remaining time is displayed during repeat timer cooking. can do. Once you know the remaining time, you can easily check the cooking progress.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional cooking device, FIGS. 2 to 11 are related to the cooking device of the present invention, FIG. 2 is a perspective view showing one embodiment of the cooking device, and FIG. The figure is a partially enlarged front view of the same operation panel, Figure 4 is a vertical sectional view of the cooking timer part, Figure 5 is a perspective view of the bevel gear with the cam in Figure 4, and Figure 6 is the same as in Figure 2. A circuit diagram of the cooking device; FIG. 7 is a side sectional view showing another embodiment of the present invention; FIG. 8 is a front view thereof; FIG. 9 is a schematic side view showing another embodiment of the present invention; The figure is a vertical sectional view showing still another embodiment of the present invention, and FIG. 11 is a diagram showing the overall configuration thereof. In the figure, 1 is a cooking device (microwave oven), 2 is a casing, 4 is an opening/closing door, 6 is a stopper member (timer function selection button), 7 is a reset button, 8
9 is a cooking start switch (cooking start button), 9 is a timer shaft, 14 is a repeat member (repeat bevel gear), 15 is a return spring, and 20 is a drive source (timer motor).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The timer shaft is rotated from the initial position of the time scale to the desired setting cooking time position, and the above setting cooking is performed by a drive source connected to the timer shaft via a rotational drive system. In a cooking device having a cooking timer that sets the cooking time by reversing the timer shaft at the time position and returning it to the initial position, the repeater is connected to the timer shaft via a return spring and is rotatable together with the timer shaft. a stopper member detachably provided on the repeat member for fixing the repeat member, and a clutch provided in the rotational drive system for connecting and disconnecting the same, the stopper member With the repeat member fixed at the set cooking time position, the drive source returns the timer shaft to the initial position against the restoring force of the return spring to operate the cooking timer, and from this state A cooking device characterized in that the same cooking time can be repeatedly set by disengaging a clutch portion of a rotary drive system and returning the timer shaft to a set cooking time position by the restoring force of the return spring. (2) The cooking device according to claim 1, wherein the clutch portion is configured to be operated by a reset button and a cooking start switch is opened and closed by operating the reset button. (3) The cooking device according to claim 1, wherein the clutch portion is configured to be operated by opening and closing an opening/closing door for loading and unloading food into the casing of the cooking device. .