JPH03253925A - Switching device - Google Patents

Abstract

PURPOSE:To prevent the misoperation of an initialization switch without providing a cover by providing an enable switch operated independently from the initialization switch, and a function inhibiting circuit for making a function of the initialization switch invalid irrespective of an operation of the initialization switch at the time of non-operation of the enable switch. CONSTITUTION:The device is provided with an initialization switch 11, an enable switch 12, and a function inhibiting circuit 13, and the enable switch 12 is operated independently from the initialization switch 11. Also, the function inhibiting circuit 13 makes a function of the initialization switch 11 invalid irrespective of an operation of the initialization switch 11 at the time of non- operation of the enable switch 12. In such a way, unless the enable switch 12 is operated by the function inhibiting circuit 13, the function of the initialization switch 11 can be made invalid, therefore, a cover for preventing a misoperation can be made unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switching device, and more particularly to a switching device having a manual initialization switch.

Computer peripherals are equipped with a manual initialization switch for initializing the computer. If this initialization switch is operated during normal operation of the computer, the computer will stop processing and initialize, so it is necessary to prevent erroneous operation.

Switch 2 cannot be operated. Therefore, after the IMPL switch 2 is operated, the cover 3 can prevent erroneous operation.

[Conventional technology]

As a computer initialization switch, the IM on the console
P L (I n1tial M 1cro P
rograg+ and 0ad) switches are known. When this IMPL switch is operated, a program for first loading a program or an operating system into the main memory is activated.

As shown in FIG. 6, a conventional switch device has a structure in which an IMPL switch 2 is provided on the side of a device main body 1, and the front surface of the IMPL switch 2 is covered with a cover 3. As a result, when operating the IMPL switch 2, first pull up the cover 3 in the direction a in the figure to expose the IMPL switch 2, and then
Operate PL switch 2.

After that, return the cover 3 to direction b in the figure and press IMPL.
However, according to the conventional switch device described above, the IMPL switch covers the front side of the switch 2.
Each time the L switch 2 is operated, the cover 3 must be opened and closed, which makes the operation complicated, and since the cover 3 is required, there are restrictions on the mounting position.

The present invention has been made in view of the above points, and an object of the present invention is to provide a switch device that prevents erroneous operation of an initialization switch without providing a cover.

[Means to solve the problem]

FIG. 1 shows a basic configuration diagram of the present invention that achieves the above object. In the figure, 11 is an initialization switch, 12 is an enable switch, and 13 is a function inhibit circuit. The enable switch 12 is operated independently of the initialization switch 11. Furthermore, when the enable switch 12 is not operated, the function inhibit circuit 13 disables the function of the initialization switch 11 regardless of whether the initialization switch 11 is operated.

[Effect]

In the present invention, the function suppression circuit 13 can disable the function of the initialization switch 11 unless the enable switch 12 is operated, so a cover for preventing erroneous operation can be eliminated.

〔Example〕

FIG. 2 shows an external perspective view of an embodiment of the main part of the present invention.

In the figure, 21 is an IMPL switch, which corresponds to the initialization switch 11. 22 is FEL (Force E
log status) switch, 23
24 is a head cleaning switch, 24 is an enable switch (corresponding to the enable switch 12), and 25 is a light emitting diode, which are provided at predetermined positions of a large computer or its peripheral equipment.

The above FEL switch 22 is a switch for selecting whether or not to input error information, and the head cleaning switch 23 is a switch for deciding whether to clean the read/write head of the floppy disk of the external storage device. .

Further, the light emitting diode 25 is configured to emit light during the functional operation period of the enable switch 24, and the three switches 21, 22, and 23 are enabled only during this light emitting period.

The above-mentioned IMPL switch 21 and head cleaning switch 23 are non-locking switches that are turned on only while being manually operated, and are automatically turned off when released. In addition, the FEL switch 22 is a lock switch, and when you manually operate it once, it turns on and remains in that state even if you take your hand off.When you operate it again in that state, it turns off and remains in that state even when you take your hand off. This is a lock switch. Note that the enable switch 24 is either a lock switch or a non-lock switch.

Next, circuit diagrams of each embodiment of the present invention will be explained. Third
The figure is a circuit diagram of the first embodiment of the present invention. In the figure, the same components as those in FIG. In FIG. 3, IMPL switch 21. FEL switch 22. One of the contacts of the head cleaning switch 23 and the enable switch 24a, which is a lock switch, is connected to the power supply terminal via resistors R+, R2, R3, and R4, and is also connected to the input terminal of the driver 30. The other contact is resistor Rs, R6.

Grounded via R7 and R8. Also resistance R+
, R2 and R4 and one contact of switch 21.22.24a are connected by capacitors C+ and C2.

Grounded via C3.

Further, a common connection point between the resistor R4, the capacitor C3, and the enable switch 24a is connected to the cathode of the light emitting diode 25, and the anode of the light emitting diode 25 is connected to the power supply terminal via the resistor R9. driver 3
0 is a circuit that inverts the input signal and outputs it. 31.3
2 and 33 are two-man power AND circuits, each one input terminal is commonly connected to the output line 34 of the driver 30, and each other input terminal is separately connected to the output lines 35, 36 and 37 of the driver 3o. There is. In Figure 3, IM
PL switch 21. FEL switch 22, head cleaning switch 23 and enable switch 2'4 a
The other circuit parts constitute the above-mentioned function suppression circuit (
(The same applies to Figures 4 and 5, which will be described later).

Next, the operation of this embodiment will be explained. When the enable switch 24a is on, the cathode side of the light emitting diode 25 is at a low level, the light emitting diode 25 is on and lit, and the line 34 from the driver 30 is turned on.
Since a high level signal is extracted, AND circuit 3
Gates 1.32 and 33 are in the "open" state.

When the IMPL switch 21 is turned on in this state, the terminal voltage of the capacitor C+ becomes low level, so the signal output from the driver 3o to the line 35 becomes high level, and the AND circuit 31 outputs a high level IMP signal.
A signal indicating the on state of the L switch 21 is taken out, and processing is performed to enable the IMPL switch function in a subsequent circuit.

Similarly, FEL switch 22. When the head cleaning switch 23 is turned on, the FEL switches 22. Head cleaning switch 2
A high level signal indicating that 3 is on is extracted. Therefore, when the enable switch 24a is on, each of the switches 21 to 23 can output signals corresponding to on/off from the AND circuits 31, 32, and 33.

On the other hand, when the enable switch 24a is off, the cathode side of the light emitting diode 25 becomes high level, the light emitting diode 25 is turned off and goes out, and a low level signal is taken out from the line 34 from the driver 3o.
The gates of the ND circuits 31, 32 and 33 are respectively in the "closed" state. Therefore, in this state, each switch 21 to 23
Even if the AND circuits 31, 32 and 33 turn on, the output signals of the AND circuits 31, 32 and 33 remain at low level and do not change. Therefore, when the enable switch 24a is off, each switch 21 to 23
Even if you turn it on, that function will be stopped.

As a result, for example, by turning off the enable switch 24a after starting computer processing, even if one of the switches 21 to 23 is accidentally turned on by a hand or other object, the on state of that switch will be ignored. Misoperation can be prevented.

Next, a second embodiment of the present invention will be described with reference to the circuit diagram of FIG. 4. In the figure, the same components as those in FIG. 3 are designated by the same reference numerals, and their explanations will be omitted. In Figure 4, 24b
An enable switch corresponds to the above-mentioned enable switch 24, and unlike the first embodiment, it is configured as a non-lock switch. Further, 4o is a timer circuit whose input terminal is connected to the common connection point of the enable switch 24b, resistor R4 and capacitor c3, and whose output terminal is connected to the connection point between the cathode of the light emitting diode 25 and the input terminal of the driver 30. has been done. The timer time of the timer circuit 40 includes, for example, 10 seconds, 20 seconds, 30 seconds, 1 minute, etc., and this timer time can be arbitrarily selected.

Next, the operation of this embodiment will be explained. When the enable switch 24b is turned on, a low level signal is applied to the timer circuit 40, the timer circuit 40 is activated, and a low level signal is taken out from the timer circuit 40 for the set timer time. Therefore, the light emitting diode 25 lights up for this timer period, the output line 34 of the driver circuit 30 becomes high level, and the gates of the AND circuits 31 to 33 are respectively set in an "open" state.

As a result, even if the enable switch 24b is returned to its original mechanical position by manually operating the enable switch 24b once to turn it on and then releasing the enable switch 24b, the timer circuit 40 is still in the timer period. The light emitting diode 25 continues to light up, and within this period, the TMPL is output from the AND circuits 31, 32 and 33.
Switch 21. FEL switch 22. A signal having a level corresponding to whether the head cleaning switch 23 is turned on or off is extracted.

After the above timer time elapses, or enable switch 24
When b remains off, the output signal of the timer circuit 40 is at a high level, which turns off the light emitting diode 25 and puts the gates of the AND circuits 31 to 33 in a "closed" state. Therefore, at this time, IM
PL switch 21, FEL switch 22. No matter which head cleaning switch 23 is turned on, AN
Each output signal of the D circuits 31 to 33 is always at a low level, and their switch functions are stopped.

Therefore, according to this embodiment, the enable switch 24b is turned on at the time of initial setting, and the IMPL switch 21 is turned on.
Initialization can be performed by turning on the switch, and even if switches 21 to 23 are accidentally turned on after the timer period has elapsed, the switch function is stopped, which prevents erroneous operation. can. Further, in this embodiment, there is no need for post-processing of the enable switch 24b, and it is possible to prevent forgetting to turn off the enable switch 24b.

Next, a third embodiment of the present invention will be described with reference to the circuit diagram of FIG. In the figure, the same components as those in FIG. 4 are denoted by the same reference numerals, and the explanation thereof will be omitted. The third embodiment shown in FIG. 5 is characterized in that an enable switch 24b having a non-locking switch structure is used in place of the enable switch 24a in the first embodiment shown in FIG.

According to this embodiment, only while the enable switch 24b is turned on by pushing it up by hand, the IMPL switch 21
．． FEL switch 22. Head cleaning switch 2
3 on/off information can be output from the AND circuits 31 to 33, and when the enable switch 24b is released, the enable switch 24b automatically returns to the OFF mechanical position, and the ON/OFF information of the switches 21 to 23 described above can be output. Stop accepting input. Therefore, this embodiment also has the same features as the first embodiment.

It should be noted that the present invention is not limited to the above-described embodiments; for example, the switches 22 and 23 may not be provided, and the present invention can also be applied to a device that further includes switches for purposes other than the switches 22 and 23. .

〔Effect of the invention〕

As described above, according to the present invention, it is possible to prevent erroneous operation of the initialization switch without using a cover, thereby freeing the user from operating force such as opening and closing the cover, improving operability, and improving the switch. It has features such as being able to improve the degree of freedom in the mounting position.

[Brief explanation of drawings]

FIG. 1 is a diagram of the principle configuration of the present invention, FIG. 2 is an external perspective view of an embodiment of the main part of the present invention, and FIGS. 3 to 5 are circuits of the first to third embodiments of the present invention, respectively. FIG. 6 is an external side view of an example of a conventional device. In the figure, 11 is a supplementary switch, 12.24 is an enable switch, 13 is a function suppression circuit, 21 is an rMPL switch, 24a is an enable switch with a lock switch structure, 24b is an enable switch with a non-lock switch structure, and 25 is a light emitting diode. shows. Fig. 1 is a diagram showing the basic structure of the present invention. Fig. 2 is an external perspective view of an embodiment of the main part of the present invention.

Claims (1)

[Scope of Claims] A switch device having at least an initialization switch (11), comprising: an enable switch (12) that is operated independently of the initialization switch (11); and when the enable switch (12) is not operated. is the initialization switch (11) regardless of the operation of the initialization switch (11).
1. A switch device comprising: a function suppression circuit (13) for disabling the function of );