JPH01311526A - Timer of electric apparatus - Google Patents

Abstract

PURPOSE:To prevent an electric apparatus from chattering no matter how a cord switch is set by a method wherein a hysteresis position is provided between positions of continuous operation and timer operation of a cord switch. CONSTITUTION:A position scale 2 of an operating knob 23 of a cord switch 21 is specified as a hysteresis position, a contact state of this position is used as a hysteresis code, and the position is provided between a scale for continuous operation and a scale 3 for timer operation. If the knob 23 of the switch 21 is set to the scale 1, states of contacts t1 to t4 are input to a microcomputer 25, and a control circuit 26 operates continuously. If the knob 23 is set to an intermediate position between the positions 2 and 1, this code is input to the computer 25 as a continuous operation state by storing the immediately previous state in the computer 25 and setting the position 2 as the hysteresis code. This permits the computer 25 to control without wavering in judgment of the set state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a timer device for electrical equipment, and particularly relates to a timer device for electrical equipment that is controlled by a microcomputer using a command to switch between continuous operation and timer operation using a code switch. It is something.

[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. 3(a) and 3(b) are schematic explanatory diagrams of the code switch, in which (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), and COM is a common terminal of the switch, tl.

1.1.14 are the contact terminals of the code switch (21). In addition, the numbers 1゜2, . . . shown in Fig. 3(a)
. . . , 12 is the position number for setting the combination position of the contacts of the code switch.

FIG. 4 is a schematic front view of the code switch (21) installed in the operating section of the timer device. In the figure, (
24) is the operation section of the timer device, and the operation section (24)
A cord switch (21) is attached to the inside of the cord switch (21) so that the operation knob (23) protrudes from an elongated hole as shown in the figure.

(23) is the operation knob for the code switch (21);
1, 2. ......, 12 is the operation knob (marked with the position number shown in Fig. 3(a)).
23) It is a position scale.

Figure 5 shows contact 1 of the code switch (21). 1.

This is a code table based on combinations of ta and t4. The first column is the position scale of the operation knob (23), and the second column is the setting time (
The unit is time), the third column is each contact point t1゜12.13.14
1 indicates that each contact is ON, and 0 indicates that each contact is OFF.

Next, the operation will be explained with reference to FIGS. 3 to 5.

Slide the operation knob (23) to connect contact 1. 1.
By turning ON and OFF 13 and 14, codes for continuous operation and timer operation from 1 hour to 11 hours are set according to the codes shown in the code table of FIG. At this time, the operation knob (23) is
As shown in the figure, the timer setting time is adjusted to the scale of 1 hour to 11 hours from continuous. For example, in continuous operation, the scale is 1, the set time is continuous, and the output contact state is 0-0-0-0.If the scale is 5, the timer setting time is 4 hours, and the contact state is o-t-1- o.

By inputting a code based on the set position of the scale into the microcomputer in this manner, a microcombiator (not shown) sets continuous or timer operation and instructs the electrical equipment to operate. In this case, the signal to the microcomputer is sent to the contact point t.
=t-ta'.

The ON/OPP state of t4 is input, and the microcomputer reads the state of this contact according to the code table shown in FIG.

[Problems to be Solved by the Invention] Since the conventional timer device for electric equipment is configured as described above, the position of the operating knob (23) is not controlled by the continuous set time (as shown in FIGS. 4 and 5), for example. If the setting is between scale 1) and 1 hour (scale 2), the microcomputer will not be able to determine whether it is continuous operation or timer operation, and as a result, the electrical equipment will start and stop chattering, etc. There was a problem.

This invention was made to solve the above-mentioned problems, and is designed to prevent electrical equipment from chattering between running and stopping even if the operating knob of the code switch is set between continuous operation and timer operation. The purpose of this invention is to obtain a timer device with a

[Means for Solving the Problems] A timer device for electrical equipment according to the present invention, when switching an electrical equipment controlled by a micro combinator between continuous operation and timer operation using a code switch, can switch between continuous operation and timer operation of the code switch. Both positions of timer operation (
The above-mentioned problem is solved by providing a hysteresis position between the scale marks.

[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 operation knob is set to an intermediate position between continuous operation and timer operation, the operation will continue in the state set just before, and the microcomputer will not be able to determine the setting state (when executing control). do.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

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

In the figure, (21) is a code switch, (25) is a microcomputer, and (2B) is a control circuit for electrical equipment. (27) is an additional circuit consisting of a resistor R1゜R, R, R that connects the code switch (21), the microcomputer (25) and □, and a power terminal (27a). It has the role of applying voltage to code switch contacts t, 't, t, and 't through resistors R, R, R, and R4, respectively, and grounding them. 1. 1
．． This is an intermediate circuit for inputting the ON/OFF state of the 1 2 3 4 contacts to the computer. Therefore, (2g) shows the operation section of the timer device consisting of a code switch (21) and an additional circuit (27).

Figure 2 shows the code switch (21) used in the embodiment of Figure 1.
) Contact 1 . 1. 1. This is a code table showing the contact status of No. 1. In Figure 2, the code switch (21
) position scale 2 (code:
l-0-0-0) is the hysteresis position, and the contact state of this hysteresis position is used as the hysteresis code, and the continuous operation scale 1 and timer operation scale 3 are set as the hysteresis position.
established between. Therefore, in the code table of 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 moving down one by one.

Next, the operation of this embodiment will be explained.

When the operation knob (3) of the code switch (21) is set to the continuous position (scale 1) shown in FIG. 4, the contact 1 . 1. 1. The state of the 14 contacts is input to the microcomputer (25), and the control circuit (2G) of the device performs continuous operation.

Next, when the operation knob (23) is installed between position 2 and continuous position 1 in Fig. 4, it is necessary to memorize the previous state in the microcomputer (25) and set position 2 to hysteresis. By converting it into a code, this code will be judged to be in the same state as the previous code state stored in the microcomputer (25), so it will be considered as a continuous state.
5).

Next, if the operation knob (23) is installed between positions 2 and 3 in Figure 4, the hysteresis code is determined to be in the timer operation state by the microcomputer (25), and the control circuit (2
6) enters timer operation mode and stops. Also,
If the operating knob (23) is initially in the timer operation position and then installed between positions 3 and 2 in Figure 4, the hysteresis code will be the timer operation code and the microcomputer ( 26
).

As mentioned above, a hysteresis position is provided between the continuous operation of the code switch of the timer device and the two positions (scale) of the timer operation, and a hysteresis code is incorporated, so that the transition from continuous operation to timer operation and timer operation are possible. Even if the operating knob or lever of the code switch is set between the two operating positions when transitioning from to continuous operation, that is, regardless of the position of the lever,
To stably perform 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 electrical equipment by a microcomputer. When performing operational control, no matter how the code switch status is set, the timer settings can be made in a stable state without causing the electrical equipment to start or stop chattering. This has the effect of providing an inexpensive and highly accurate device.

[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 states of the code switch used in the embodiment of Fig. 1, Fig. 3(a) is a schematic configuration diagram of a conventionally used code switch, and Fig. 3(b)
4 is a schematic diagram of an operating section in which a code switch is incorporated into a timer device, and FIG. 5 is a code chart showing the contact states of a conventional code switch. In the figure, (21) is the code switch, (22) is the contact connection circuit diagram of the code switch, (23) is the operation knob,
(24) is an operation unit, (25) is a microcomputer,
(26) is a control circuit for electrical equipment. Note that the same reference numerals in the figures indicate the same or equivalent parts. Li 7 Q

Claims (1)

[Scope of Claims] In a timer device for electrical equipment that computer-controls switching between continuous operation and timer operation based on a command of a setting code by switching contacts of a code switch, the code that sets the 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 switch.