JPH0584619B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a timer device for electrical equipment,
In particular, the present invention relates to a timer device for electrical equipment that is controlled by a microcomputer using a code switch to switch between continuous operation and timer operation.

[Prior Art] In a conventional timer device for electrical equipment, the configuration and setting method of the main part of the device for setting continuous operation and timer operation using a code switch will be described.

FIGS. 3a and 3b are schematic explanatory diagrams of the code switch, where a is a structural diagram of the code switch and b is a wiring circuit diagram thereof. In the figure, 21 is a code switch, 22 is a wiring diagram of the code switch 21, COM is a common terminal of the switch, t ₁ , t ₂ , t ₃ , t ₄
is a contact terminal of the code switch 21. Further, the numbers 1, 2, . . . , 12 shown in FIG. 3A are the position numbers for setting the combination positions of the contacts of the code switch.

FIG. 4 is a schematic front view of the code switch 21 incorporated into the operating section of the timer device. In the figure, reference numeral 24 denotes an operating section of the timer device, and a cord switch 21 is mounted inside the operating section 24 so that an operating knob 23 protrudes from an elongated hole as shown in the figure. Reference numeral 23 is an operating knob of the code switch 21, and 1, 2, .

FIG. 5 shows contact points t ₁ , t ₂ , t ₃ , and
This is a code table for t ₄ combinations. The first column shows the position scale of the operation knob 23, the second column shows the setting time (unit: hours), and the third column shows the status of each contact t ₁ , t ₂ , t ₃ , t ₄ , and 1 indicates that each contact is If ON, 0 is OFF
This is the case.

Next, the operation will be explained with reference to FIGS. 3 to 5. Slide the operation knob 23 and
By turning on and off t ₁ , t ₂ , t ₃ , and t ₄ , according to the code shown in the code table in Figure 5,
Set the code for continuous operation and timer operation from 1 hour to 11 hours. At this time, as shown in FIG. 4, the operating knob 23 is set to the continuous timer setting time scale of 1 hour to 11 hours. For example, in continuous operation, the scale is 1, the set time is continuous, and the output contact status is 0-0-0.
-0, and when the scale is 5, the timer setting time is 4 hours, and the contact state is 0-1-1-0.

In this way, by inputting the code according to the scale setting position into the microcomputer,
A microcomputer (not shown) sets continuous or timer operation and instructs the electrical equipment to operate. In this case, the signal to the microcomputer is transmitted through contacts t ₁ , t ₂ , t ₃ , and t _{4 .}
The ON/OFF state is input, and the microcomputer reads the contact state according to the code table shown in Figure 5.

[Problems to be Solved by the Invention] Since the conventional timer device for electrical equipment is configured as described above, the position of the operation knob 23 is not adjusted to the continuous set time (scale 1) shown in FIGS. 4 and 5, for example. ) and 1 hour (scale 2), the microcomputer will not be able to determine whether to run continuously or on a timer, resulting in problems such as electrical equipment chattering between running and stopping. It was hot.

This invention was made to solve the above problems, and even if the operating knob of the code switch is set between continuous operation and timer operation,
The object of the present invention is to provide a timer device that prevents electric equipment from chattering when it starts and stops.

[Means for Solving the Problems] A timer device for electrical equipment according to the present invention provides a timer device for switching between continuous operation and timer operation of an electrical equipment controlled by a microcomputer using a code switch. The above-mentioned problem is solved by providing a hysteresis position between both operating positions (scales).

[Function] In this invention, a hysteresis code is provided in the code switch that switches between continuous operation and timer operation, so that this hysteresis code is read by the microcomputer as the same state as the code that was set immediately before. Therefore, even if the operating knob is set to an intermediate position between continuous operation and timer operation, the device will operate in the state set immediately before, and the microcomputer will execute control without hesitation in determining the setting state.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a main block circuit diagram showing the configuration of an embodiment of the present invention. In this configuration, the code switch and operating section shown in the conventional example shown in FIGS. 3 and 4 have substantially the same configuration and are applied to the embodiment shown in FIG.

In the figure, 21 is a code switch, 25 is a microcomputer, and 26 is a control circuit for electrical equipment. 27 is a resistor R ₁ connecting the code switch 21 and the microcomputer 25;
This is an additional circuit consisting of R ₂ , R ₃ , R ₄ and a power supply terminal 27a, and the voltage from the power supply terminal 27a is connected to code switch contacts t ₁ , t ₂ , t ₃ , t 4 through resistors R ₁ , t 3 and t ₄ , respectively.
It has the role of applying voltage and grounding via R ₂ , R ₃ , R ₄ , and the code switch contacts t ₁ , t ₂ , t ₃ ,
This is an intermediate circuit for inputting the ON/OFF contact status of _t4 to the computer. Therefore, 2
Reference numeral 8 indicates an operating section of the timer device consisting of a code switch 21 and an additional circuit 27.

FIG. 2 is a code table showing the contact states of contacts t ₁ , t ₂ , t ₃ , and t ₄ of the code switch 21 used in the embodiment of FIG. 1. In FIG. 2, position scale 2 (code: 1-0-0-0) of the operation knob 23 of the code switch 21 is set as the hysteresis position, and the contact state of this hysteresis position is used as the hysteresis code, and the continuous operation scale is 1
and the timer operation scale 3. Therefore, in the code table shown in FIG. 2, the setting scale 3 is set to 1 hour, which is the set time of the timer operation, and the setting scale 12 is set to 10 hours by sequentially descending.

Next, the operation of this embodiment will be explained.

When the operation knob 23 of _the code switch 21 is set to the continuous _position (scale ₁ ) _shown in FIG. The information is input to the computer 25, and the control circuit 26 of the device performs continuous operation. Next, when the operating knob 23 is installed between position 2 and continuous position 1 in FIG. As a result, this code is determined to be in the same state as the immediately previous code state stored in the microcomputer 25, so that it is input to the microcomputer 25 as a continuous state. Next, when the operating knob 23 is placed between positions 2 and 3 in FIG. mode and stops. Furthermore, if the operation knob 23 is initially in the timer operation position and then installed between positions 3 and 2 in FIG. It is becoming increasingly judged by

As mentioned above, a hysteresis position is provided between the continuous operation of the code switch of the timer device and the timer operation position (scale), and a hysteresis code is incorporated, so that the transition from continuous operation to timer operation and the timer When transitioning from operation to continuous operation, even if the operating knob or lever of the code switch is set between the two operation positions, i.e. regardless of the position of the lever,
To stably execute microcomputer control of electrical equipment without causing chattering to the microcomputer due to signals input from a code switch.

[Effects of the Invention] As described above, according to the present invention, the code on the scale between the continuous operation and timer operation positions of the code switch of the timer device is defined as a hysteresis code, and this code is used to control the When controlling the operation of electrical equipment, the system is configured so that timer settings can be made in a stable state without causing the electrical equipment to start or stop, no matter how the code switch is set. Therefore, an inexpensive and highly accurate device can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a main circuit diagram showing the configuration of an embodiment of the present invention, Fig. 2 is a code chart showing the contact state of the code switch used in the embodiment of Fig. 1, and Fig. 3a is a conventional circuit diagram. A schematic configuration diagram of the code switch used, Fig. 3b is its wiring circuit diagram, Fig. 4 is a schematic diagram of the operating section incorporating the code switch into a timer device, and Fig. 5 shows the contacts of a conventional code switch. It is a code table diagram showing the state. In the figure, 21 is a code switch, 22 is a contact connection circuit diagram of the code switch, 23 is an operating knob, 24 is an operating section, 24 is a microcomputer, and 26 is a control circuit for the electrical equipment.
Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. In a timer device for electrical equipment in which a computer controls switching between continuous operation and timer operation based on a setting code command by switching contacts of a code switch, the above-mentioned method for setting continuous operation and timer operation is provided. A timer device for electrical equipment, characterized in that a hysteresis position for outputting a hysteresis code is provided between two positions of a code switch.