JPS631391Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operation mode changeover switch that selects and displays the operation mode of a controller, indicating device, or the like used in combination with a computer.

Controllers, etc. are generally operated in computer mode (hereinafter referred to as DDC), which is operated by a separate external computer.
There are multiple operating modes, such as manual mode (hereinafter referred to as MAN mode), which operates manually (hereinafter referred to as MAN mode), and automatic control mode (hereinafter referred to as AUTO mode), which operates automatically. There is.

FIG. 1 is a front view of the front surface of a controller equipped with a lever-type operating mode changeover switch. 1 is a twin-point indicator, with a measured value indicator 11 and a set value indicator 1.
2 indicates the measured value and set value. 2 is an output indicator, and an output value is indicated by an output value indicator 21. This controller uses DDC on the output value.
It has three operation modes: mode, MAN mode, and AUTO mode, and lever 3 of operation selector switch 3
According to the position 1, the operation mode is selected. Since the operational mode changeover switch having such a mechanical structure can be constructed very thinly, it is possible to install it in a narrow space between the double-needle indicator 1 and the output indicator 2. However, such a conventional lever-type operation mode changeover switch has the following drawbacks when used in the DDC mode.

In other words, a controller and a calculator are used in combination.
In DDC mode, if the computer fails,
The lever 31 remains in the DDC position and the operating mode is automatically switched to MAN mode or AUTO mode. At this time, the indicator lamp 5 and the like are lit to indicate that the lever 31 position does not correspond to the actually selected operation mode.
In this way, the lever type operation selector switch is
If the computer malfunctioned in DDC mode, the operator handling the controller would have to make unnecessary decisions. Furthermore, since this operating mode selector switch is operated by mechanical operation, it has the disadvantage that the operating mode cannot be selected from a remote location.

For this reason, controllers equipped with an illuminated push-button operation mode changeover switch as shown in FIG. 2 have been used. In this figure, the same elements as in FIG. 1 are given the same numbers and their explanations will be omitted.
Each illuminated push-button switch 4 corresponds to one operating mode, and the operating mode is indicated by the light position of the illuminated push-button switch. Therefore, if the operator wants to switch from DDC mode to AUTO mode, select AUTO
By pressing the illuminated push-button switch 4 that is displayed, the operating mode is switched to AUTO mode, and the AUTO position is illuminated. With such an operation mode changeover switch using an illuminated push button switch, if the computer malfunctions when DDC mode is selected, it will automatically switch to AUTO mode or
When the operating mode is switched to MAN mode, the light position is automatically changed. Therefore,
If the computer malfunctions when the DDC mode is selected using a lever-type selector switch, the display of the operating mode depending on the lever position may not correspond to the actual operating mode.Use an illuminated push-button switch. This will no longer occur.

However, the illuminated pushbutton switch has a complicated structure and cannot be made small. Therefore, unlike a lever-type operating mode changeover switch, an illuminated pushbutton cannot be installed in a narrow space between the double-needle indicator 1 and the output indicator 2.

The present invention uses an indicator lamp and a pushbutton switch to provide an operation mode changeover switch in which the indication by the light position of the operation mode matches the selected operation mode, such as an illuminated pushbutton switch, and the switch also uses a lever. The present invention is characterized in that the operation mode is displayed at narrow intervals by display lamps, like a type operation changeover switch.

FIG. 3a is a diagram showing the operating mode changeover switch of the present invention. Assume that there are n operation modes. One indicator lamp L _i (i
=1 to n) are arranged in a line in correspondence, and one switch SW _i (i=1
~n-1) is placed. Therefore, this operation mode changeover switch has n indicator lamps L ₁ to L _o and n-
The switches SW ₁ to _{SW o-1} are arranged alternately in a row. Also, one of the indicator lamps L ₁ to _Lo that corresponds to the selected operation mode lights up. By pressing the switch located on one side adjacent to the indicator lamp in this light, the lighting position of the indicator lamp moves to the indicator lamp located next to it on one side, corresponding to the newly lit indicator lamp. An operating mode is selected. For example, when indicator lamp L ₄ is lit, if you press switch SW 3 adjacent to the left side, indicator lamp L ₃ located one position to the left of L ₄ will light up, and the operation mode corresponding to L ₃ will be selected _. be done. Therefore, when the operating mode corresponding to indicator lamp L ₂ is selected as shown in Figure 3b, if switch SW ₂ is pressed and then SW ₃ is pressed, indicator lamp L ₃ lights up first and then turns on. L ₄ lights up and the operation mode corresponding to L ₄ is selected.

FIG. 4 shows an embodiment of a circuit for driving the operating mode changeover switch of the present invention. n T flip-flops FF _i (i=1 to n) for n operating modes
corresponds, and one selected one of the n T
Flip-flop output Q _i (i=1, 2,...,n)
The lighting of the display lamp and the operation mode are selected by the button. Reset terminal R _i of each T flip-flop
The logical sum of the outputs of other T flip-flops is added to (i=1 to n). That is, R ₁ is Q ₂ , Q ₃ ...,
When Q _o is input, the output of OR gate OR _{1 is}
The output of _{the OR gate OR 2 which} inputs Q ₁ , Q ₃ ..., Q o is..., R _o is the OR gate whose inputs are Q ₁ , Q ₂ , ..., Q _o-1
The output of gate OR _o is connected. On the other hand, the trigger input terminal T _i ( _i
=1, 2, . . . , n) is the logical sum of the set signals generated when either one of the switches SW _i-1 and SW _i is turned “ON”. That is, one end of the switches SW ₁ to SW _o-1 is connected to a constant potential E _b , and the other end is dropped to a common potential via load resistors Z ₁ to _{Z o-1,} respectively. The connection point S _i (i = 1 to n-1) between the switch SW _i and the load resistance Z _i is connected to the OR gate OR' ₁ and
It is connected to the input of OR′ ₁ and its output is connected to the trigger input terminal. However, since gate circuits OR' ₁ and OR' _o receive only the set signals generated by SW ₁ and SW _o-1, respectively, OR' ₁ and OR' _o
can be omitted.

Assume that the operation mode corresponding to the lamp _L2 is selected by the operation mode changeover switch driven by the circuit configuration as shown in FIG. 4 above. At this time, the output Q ₂ of flip-flop FF ₂ is “ON”, and the flip-flops other than flip-flop FF ₂ are
An "ON" input is applied to the reset terminal via the OR gate OR _i (i≠2), and its output Q _i (1≠2) is "OFF". Here the operator switches
When SW ₂ is turned “ON”, a voltage is generated across the load resistor Z ₂ and the connection point S ₂ is turned “ON”. Therefore FF ₂ is OR
“ON” to trigger input T ₂ via gate OR′ ₂
When the input is input, the output of FF ₂ is inverted and Q ₂ is turned “OFF”. For this reason, all T flip-flops receive an "OFF" input to their reset inputs R _i (i=1, 2, . . . , n), so that the reset state is released. Further, the "ON" input generated at _the connection point _S2 is applied to the flip-flop FF3 via the OR gate _OR'3 to the trigger input _T3 , and the output _Q3 of the flip-flop _FF3 becomes "ON". Therefore, the reset terminal R _i (i≠3) of the other T flip-flop is connected to the OR gate OR _i (i≠3).
“ON” input is input through Q _i (i≠
3) becomes “OFF”. Therefore, only the output _Q3 of the T flip-flop _FF3 is turned "ON", and this output drives the display lamp _L3 and the operation mode corresponding to the display lamp.

FIG. 5 shows an embodiment of a circuit for driving an operation mode changeover switch when there are three operation modes. In the case where there are three operation modes, the drive circuit shown in FIG. 4 can of course be used, but the circuit shown in FIG. 5 can also be used for driving. Q ₁ , Q ₂ , and Q ₃ are outputs for selecting the light and operation mode _of the indicator lamps L ₁ , L ₂ , and L ₃ .
_Q3 is the output of T flip-flops _FF1 and _FF3 . On the other hand, the output _Q1 of T flip-flop _FF1 is _FF3
The output _{Q 3} of FF ₃ is connected to the reset terminal R ₃ of FF ₁ , and the inverted output terminals ₁ and ₃ of FF ₁ and FF ₃ are input to the AND gate, and their AND value is _Q2 . Trigger inputs T ₁ and T ₃ of T flip-flops FF ₁ and FF ₃ are connected to the common potential E _b via switches SW ₁ and SW ₂ , respectively. For example, a switching transistor is used as a circuit for lighting the indicator lamps L ₁ , L ₂ , and L ₃ .
Outputs _{Q 1 , Q 2 ,}
Connect Q ₃ , connect the respective collectors to the common potential E _b , connect one end of each indicator lamp L ₁ , L ₂ , L ₃ to the emitter, and connect the other end of indicator lamps L ₁ , L ₂ , L ₃ to the emitter. It is possible to adopt a configuration in which the potential is lowered to a common potential.

In an operation mode switching circuit with such a configuration, if we consider that the output Q ₁ is initially in the "ON" state and the indicator lamp L ₁ is lit, when the switch SW ₁ is "ON", the trigger input terminal T of FF ₁ is switched on. When the “ON” input is input to _Q1 , the output _Q1 is inverted and becomes “OFF”. Therefore FF ₃
The inverting input terminal _R3 of T3 turns "OFF _{" and the reset state of FF3 is released, but since there is no input to T3, FF3 maintains the "} ON" state. Therefore the output Q ₂
is “ON”, Q ₁ and Q ₂ are “OFF”, and the indicator lamp L ₂ is lit. Next, when switch SW ₂ is turned “ON”, “ON” input is input to trigger input terminal T ₃ of FF ₃ , Q ₃ becomes “ON”, ₃ becomes “OFF”, and therefore output Q ₂ becomes “OFF”. ”, and the output
Only Q ₃ is in the “ON” state. Such a circuit can drive the operating mode changeover switch of the present invention.

In addition, the switch SW ₁ described in Figures 4 and 5
As shown in Fig. 6, the collector of a switching transistor Tr' _i is connected to one end of a mechanical push button switch P _i , the emitter is connected to the other end, and a remote switching signal from the outside is connected to the base of Tr' _i . It is also possible to use a device that allows remote control to turn the receiving switch ON and OFF.

As described above, in the operating mode changeover switch of the present invention, the indicator lamp and switch have a simple structure and can be small in size. For this reason, the front view of the controller equipped with the operating mode changeover switch of the present invention is shown in FIG. 7 (the same elements as in FIGS. 1 and 2 are given the same reference numerals and their explanations are omitted). As shown in Figure 2, it is possible to place the operation mode changeover switch in a narrow space between the twin-needle indicator and the output indicator, which has not been possible with the conventional operation mode changeover switch using an illuminated push button switch. It becomes like this.

In addition, in the conventional illuminated push button operation mode changeover switch, n illuminated push button switches were required for n operation modes, but with the present invention, one less illuminated push button switch is required for n operation modes. Only n-1 switches are required, the number of mechanical parts of the switch is reduced, and reliability is improved. Since indicator lamps and switches are easily available in various shapes and sizes, the degree of freedom in design is increased.

Furthermore, if the controller is operated in DDC mode, if the calculator malfunctions, the operation will automatically switch to AUTO mode or MAN mode, and the operating mode display will also light up accordingly. The position will start to change.

[Brief explanation of the drawing]

Figure 1 is a front view of the front of the controller equipped with a lever-type operation changeover switch, Figure 2 is a front view of the front of the controller equipped with an illuminated push-button operation changeover switch, and Figures 3a and b are the operations of the present invention. A conceptual diagram of the mode changeover switch, Fig. 4 is a circuit diagram of a circuit that drives the inventive operation mode changeover switch, Fig. 5 is a circuit diagram of another example of the circuit that drives the inventive operation mode changeover switch, and Fig. 6 7 is a circuit diagram showing an example of a switch that can be driven by a remote switching signal, and FIG. 7 is a front view of the controller equipped with the operating mode switching switch of the present invention. L ₁ ~ L _o ... Indication lamp, SW ₁ ~ _{SW o-1} ... Switch.

Claims (1)

[Scope of utility model registration request] An operation mode changeover switch that has a plurality of operation modes and display lamps corresponding to each operation mode, selects one of the operation modes, and displays the selected operation mode by the light of the display lamp. , arrange the indicator lamps in a row and place one switch between each indicator lamp, and press the switch located on one side adjacent to the indicator lamp in the light corresponding to the selected operation mode. The operating mode changeover switch is characterized in that the lighting position of the indicator lamp is shifted to the indicator lamp located next to the indicator lamp on the one side, and the operating mode corresponding to the indicator lamp currently being lit is selected. .