JP2011008365A - Input device and erroneous input preventing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an input device for arbitrarily and easily setting a key code not to be output, and for easily switching a normal mode and a lock mode.SOLUTION: The input device 100 includes: a key 101; a memory 102 for storing a key code corresponding to the key of a key; a control unit 103 for reading and for output of the key code corresponding to a depressed key from the memory; a first switch 104a for switching the operation of a control unit to a normal mode or a lock mode; and a second switch 104b for switching the operation of the control unit to lock function setting ON or OFF. When the operation of the control unit is switched to the lock mode and the lock function setting ON, the key code corresponding to the depressed key is stored as a key code not to be output, or converted into a dummy key code and stored in the memory, and depressed key information corresponding to the normal mode and the lock mode is stored in the memory.

Description

  The present invention relates to an input device and an erroneous input prevention method thereof, and more particularly to an input device such as a keyboard connected to an electronic device such as a personal computer and an erroneous input prevention method thereof.

  One of input devices connected to an electronic device such as a personal computer is a keyboard. By pressing each key, the keyboard sends a key code corresponding to the key to the electronic device that is the connection destination. The main interface standards for connecting a keyboard to a personal computer include the USB standard (Universal Serial Bus) and the PS2 (standard interface for PC / AT compatible machines). The key code of the key switch is sent to input characters for electronic equipment. In other words, when an arbitrary key is pressed, an operation corresponding to software on the personal computer and character input are performed.

  In recent years, electronic devices such as personal computers have become widespread and have been used in a wide range of generations from young people to elderly people. When a user who is unfamiliar with the use of the input device handles it, the fact that the key can be easily pressed is likely to cause an erroneous key input, which may cause a malfunction.

  For example, if adjacent keys are pressed by mistake, different key inputs will be performed along with the key input that should be input, and the software will malfunction. Alternatively, erasure is required, and the user operation becomes complicated. In some cases, the software was terminated or the software settings changed, causing malfunctions.

  As described above, with the widespread use of electronic devices such as personal computers equipped with input devices that require key press operations, environments used by a wide range of generations are increasing. While key presses can be easily performed, there have been problems such as easy input errors and incorrect operations, and unintentional incorrect operations.

  In addition, when using electronic devices equipped with input devices on the production line of a manufacturing plant where manufacturing is performed, it is more efficient to save the operator's effort and increase the production efficiency by using only simple key inputs. . Even in an input device having a plurality of keys, only a few keys are operated by the operator, and most keys are not used.

  More specifically, a simple operation (specify the input device key input at the start of the test and automatically start the test, enter the key at the end of the test, store the inspection data, and proceed to the next product test) Key input only). There is no need to perform another key input. In other words, there is a case where no key input is performed. This is because performing other key inputs may cause malfunctions such as the software on the personal computer being terminated, or the software settings being changed and inspection being impossible. In some cases, a device is physically enclosed so that keys other than those requiring key input cannot be operated.

  From the above, erroneous input and erroneous operation of the input device connected to the electronic device are problems that must be solved in order to prevent malfunction of the electronic device. On the other hand, examples of the invention for preventing these erroneous inputs or erroneous operations are disclosed as follows.

  As an example, the keyboard key layout is divided into a plurality of blocks in advance. When the changeover switch is off, the key data to be sent is sent unconditionally. When the changeover switch is on, a predetermined block is sent. A keyboard that prohibits transmission of key data other than these keys is disclosed (for example, see Patent Document 1).

  As another example, a key lock method is disclosed in which an address corresponding to each predesignated key can be set by restricting input by inputting the address while pressing the lock key (for example, Patent Document 2).

  Further, as another example, a key input code that considers key input valid is set in advance, and when a predetermined key input code is input by the key input signal conversion means, whether or not the key input code is valid If it is determined and valid, a keyboard input device for transmitting to a predetermined data processing device via a key input code transmission means is disclosed (for example, see Patent Document 3).

  Furthermore, as another example, an information input keyboard having an operation means for prohibiting transmission of information of a plurality of specific key switches constituting a part of the plurality of key switches is disclosed (for example, Patent Documents). 4).

  Furthermore, as another example, a terminal device is disclosed that operates so as to ignore even when the STOP key is pressed by pressing three predetermined keys (see, for example, Patent Document 5).

  Furthermore, as another example, each entry has an invalid table that lists the system status and keys that are invalid in that status, and the key code in the corresponding entry of the invalid table is not sent to the system control unit and application. An invalid key control device that controls the above is disclosed (for example, see Patent Document 6).

Japanese Utility Model Publication No. 62-146234 JP-A-57-105030 Japanese Patent Laid-Open No. 04-023025 Japanese Patent Laid-Open No. 04-133119 Japanese Patent Laid-Open No. 05-204515 JP 09-258870 A

  However, in the invention described in Patent Document 1, it is necessary to previously divide the keyboard key layout into a plurality of blocks and register it in a memory or the like. Therefore, there is a drawback that the keyboard key arrangement cannot be arbitrarily divided.

  In the invention described in Patent Document 2, only one key table for storing correspondence information between designated keys and addresses is prepared. Therefore, switching between the standard mode and the key input restriction mode is performed as necessary. However, there is a disadvantage that it takes a long time to switch the mode because it is necessary to release the setting by pressing the lock key every time, inputting the address corresponding to each key.

  Further, the invention described in Patent Document 3 has a drawback in that it is necessary to previously set a key input code for valid key input, and the key input code cannot be arbitrarily set.

  Further, the invention described in Patent Document 4 has a drawback that it is necessary to previously set a specific plurality of key switches, and the key switches cannot be arbitrarily set.

  In addition, the invention described in Patent Document 5 requires that a key map for ignoring pressing of the STOP key be set in advance by pressing three keys, and any key that ignores pressing of the STOP key can be arbitrarily set. There is a disadvantage that it cannot be set.

  Further, the invention described in Patent Document 6 is realized by creating a list of invalid keys as many as the number of system states in advance, and it is necessary to store the list in a memory or the like of the input device in advance. Therefore, there is a drawback that the list cannot be arbitrarily set.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an input device that can arbitrarily and easily set a key code or dummy key code that is not output, and that can be easily switched between the normal mode and the lock mode, and an erroneous input prevention method thereof. It is in.

  In order to solve the above problems, an input device according to the present invention reads a key part, a memory storing a key code corresponding to the key of the key part, and a key code corresponding to a pressed key from the memory. A control unit that outputs, a first switch that switches an operation of the control unit to a normal mode or a lock mode, and a second switch that switches an operation of the control unit to a lock function setting on or off. When the lock mode and the lock function setting are on, the key code corresponding to the pressed key is stored in the memory as a key code not to be output or converted into a dummy key code, and the normal mode is stored in the memory. And press key information corresponding to the lock mode is stored.

  The erroneous input prevention method according to the present invention includes a key unit, a memory storing a key code corresponding to the key of the key unit, and a control unit that reads out and outputs the key code corresponding to the pressed key from the memory. A first switch for switching the operation of the control unit to a normal mode or a lock mode, and a second switch for switching the operation of the control unit to a lock function setting on or off, and the memory further includes the normal mode and An erroneous input prevention method in an input device in which pressed key information corresponding to the lock mode is stored, wherein the control unit has a key code corresponding to a key pressed when the lock mode and the lock function setting are on. Lock function setting to store in the memory as a non-output key code or converted to a dummy key code Characterized in that it comprises a step.

  The program according to the present invention includes a key unit, a memory in which a key code corresponding to the key of the key unit is stored, a control unit that reads out and outputs the key code corresponding to the pressed key from the memory, A first switch that switches the operation of the control unit to a normal mode or a lock mode; and a second switch that switches the operation of the control unit to a lock function setting on or off, and the memory further includes the normal mode and the lock mode A key code corresponding to a key to be pressed when the lock mode and the lock function setting are turned on in the control unit. Is stored in the memory as a key code that is not output or converted to a dummy key code. Characterized in that it is intended to execute the click function setting step.

  According to the present invention, it is possible to obtain an input device that can arbitrarily and easily set a key code or a dummy key code that is not output and can easily switch between a normal mode and a lock mode, and an erroneous input prevention method thereof.

It is a block diagram for demonstrating the principle of operation of the input device which concerns on this invention. It is a block diagram of 1st Embodiment of the input device which concerns on this invention. It is a block diagram of an example of the input device 1 which concerns on this invention. It is a flowchart which shows the ON / OFF operation | movement of the lock switch in 1st Embodiment. It is a flowchart which shows operation | movement of the lock function setting method in 1st Embodiment. It is a block diagram of 2nd Embodiment of the input device which concerns on this invention. It is a flowchart which shows the ON / OFF operation | movement of the lock switch in 2nd Embodiment. It is a flowchart which shows the operation | movement of the lock function setting in 2nd Embodiment.

  First, the operation principle of the present invention will be described before the description of the embodiment. FIG. 1 is a block diagram for explaining the operating principle of an input device according to the present invention. Referring to the figure, the input device 100 reads out from the memory 102 a key part 101, a memory 102 in which a key code corresponding to the key of the key part 101 is stored, and a key code corresponding to a pressed key. The control unit 103 includes a first switch 104a that switches the operation of the control unit 103 to the normal mode or the lock mode, and a second switch 104b that switches the operation of the control unit 103 to the lock function setting on or off. The memory 102 stores pressed key information corresponding to the normal mode and the lock mode.

  Next, the operation of the input device 100 will be described. When the lock mode and the lock function setting are on, the control unit 103 stores the key code corresponding to the pressed key as a key code not to be output or converted into a dummy key code in the memory 102.

  Therefore, according to the present invention, it is possible to set a key code or dummy key code that is not output only by pressing a key, so that key setting is facilitated, and pressed key information corresponding to the normal mode and the lock mode is stored in the memory 102. Since these modes are stored and can be switched by the first switch 104a, it is easy to switch between the normal mode and the lock mode.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, the first embodiment will be described. FIG. 2 is a configuration diagram of the first embodiment of the input device according to the present invention. For convenience, the electronic device 2 not included in the input device is displayed together with the input device in FIG.

  Referring to the figure, an input device 1 such as a keyboard is connected to an electronic device 2 such as a personal computer. The input device 1 includes a key unit 3 for character input and operation, a display unit (for example, an LED (Light Emitting Diode) unit 4), and a lock switch (lock setting switch) 5.

  The electronic device 2 is an electronic device such as a personal computer, and since it is a general device including a CPU (Central Processing Unit), a memory, an LCD (Liquid Crystal Display), etc., details are omitted. Further, the lock switch 5 has a structure in which a slide switch and a button switch are combined, thereby realizing two switch functions with one switch. The lock switch 5 has both a lock switch and a lock setting switch. The lock switch 5 is an example and can be arbitrarily changed.

  In addition, input devices such as a keyboard generally have a display such as an LCD, and cannot be confirmed on a display screen of an electronic device. Instead, the current state of the input device can be displayed and the LED can be lit or blinked for confirmation by the operator. Considering a keyboard which is a general input device, usually three LEDs for NUM LOCK, SCROLL LOCK, and CAPS LOCK are often used. It is also possible to configure the display unit 4 that displays and informs the state by a combination of the three LEDs.

  FIG. 3 is a configuration diagram of an example of the input device 1 according to the present invention. In the figure, the same parts as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. Referring to the figure, the input device 1 includes a key unit 3, a display unit (hereinafter referred to as an LED unit) 4, lock switches 5a and 5b, a controller 7 of the input device 1, a memory 6, And a program storage unit 11.

  As an example, the lock switch 5a is a slide switch, and the lock switch 5b is a button switch. In this case, as an example, the lock switch 5b is configured not to be pressed unless the lock switch 5a is slid. Therefore, in this case, the lock switch 5a is used for switching between the normal mode and the lock mode, and the lock switch 5b is used for switching the lock function setting on / off.

  In the figure, specific numbers, characters, and symbols are assigned to the keys of the key unit 3, but the present invention is not limited to these. Further, the program storage unit 11 stores a program of an erroneous input prevention method described later.

  The controller 7 always performs a key scan to detect that the key unit 3 has been pressed. When the controller 7 detects that an arbitrary key of the key unit 3 is pressed, the controller 7 sends a key code corresponding to the pressed key to the electronic device 2. The memory 6 stores information that associates the pressed key with the key code. By holding the information in which the key and the key code are associated with each other in the memory 6, the key code corresponding to the pressed key can be transmitted from the control controller 7 to the electronic device 2.

  When the key input is restricted, information corresponding to the pressed key and the key code of the lock target key is added and held in the memory 6, so that even if there is a key input, the lock target key A function that does not send out the key code is realized.

  Next, the operation of the first embodiment will be described. FIG. 4 is a flowchart showing the on / off operation of the lock switch according to the first embodiment. The following operation is executed by the controller 7 controlling the key unit 3, the LED unit 4, and the memory 6.

  In the flowchart of FIG. 4, an operation button for switching between operating in a state in which key input is restricted (hereinafter, lock mode) or operating in a normal mode in which key input is not restricted is a lock switch 5. Each operation when the lock switch 5 is turned on and turned off will be described below.

  First, if the lock switch 5 is off (the lock switch 5a is in the normal mode side) in step A1, the process proceeds to step A2, and the controller 7 reads the normal mode key map from the memory 6 (pressed when the key scan is performed). Information corresponding to the key code sent to the electronic device 2). The memory 6 stores a key code corresponding to each key.

  Next, proceeding to step A3, the controller 7 performs a key scan. If a key is pressed, the process proceeds to step A4, where the key code corresponding to the pressed key is read from the key map and sent to the electronic device 2.

  Thereafter, key input is performed by repeating Step A4 and Step A5. When operating in the normal mode, as with a general keyboard, all key inputs are possible without restrictions on key input.

  Next, when the lock switch 5 is turned on at step A1 (the lock switch 5a is on the lock mode side), the process proceeds to step A5 to perform a setting for restricting key input (hereinafter referred to as lock function setting). The specific setting here is to cause the controller 7 to read the information on the lock target key by pressing the key as the lock target key in the lock function setting state (the state where the lock switch 5b is pressed), Save in memory 6.

  When the lock target key is pressed, the control controller 7 refers to the information on the lock target key in the memory 6 and performs an operation of not sending the key code to the electronic device 2.

  After the lock function setting in step A5 is completed, the process proceeds to step A6, where the controller 7 reads the key map in the lock mode from the memory 6 and starts the operation in the lock mode. Specifically, as in the normal mode, the process proceeds to step A7 to start key scanning, and in step A8, the key code corresponding to the key pressed from the key map in the lock mode is read and sent to the electronic device 2.

  The lock function setting in step A5 will be described in detail with reference to the flowchart of FIG. When the lock target key is pressed by performing the lock function setting in step A5, the key code is not sent from the input device 1 to the electronic device 2. Therefore, even when the key is pressed in the key scan in step A7, the key code of the lock target key is not transmitted, and the key code is not input to the electronic device 2. When adjacent keys are pressed by mistake, or when a different key is pressed together with a key input that should be originally input, it is possible to prevent malfunction by setting the lock target key.

  Next, a lock function setting method will be described. FIG. 5 is a flowchart showing the operation of the lock function setting method according to the first embodiment. The following operation is executed by the controller 7 controlling the key unit 3, the LED unit 4, and the memory 6.

  The control when the lock switch 5 is on and off has already been described with reference to the flowchart of FIG. 4, and the lock function setting described here corresponds to step A5 of the flowchart of FIG. Details of the lock function setting will be described below.

  In the flowchart of FIG. 5, the operation starts on condition that the lock switch 5 is on (lock mode). After the lock switch 5 is turned on for the first time, it is necessary to proceed to step B1 and turn on the lock function setting switch (press the lock switch 5b). In the configuration diagram of FIG. 2, the lock switch 5 and the lock function setting switch are combined. The lock switch 5 is a system that can be assigned to the lock function setting switch by adopting a specification that allows the push switch to be turned on structurally when the lock switch is turned on by a slide switch.

  When the lock switch 5 is on and the lock function setting switch is on, the process proceeds to step B2. If two switches can be provided, the structure and specifications of the switch are arbitrary and can be freely changed. Next, simultaneously with the transition to the lock function setting mode in step B2, the blinking of the LED unit 4 in step B13 is started. Since the blinking of the LED unit 4 is intended to indicate the transition to the lock function setting mode, the lighting and blinking of the LED unit 4 can be freely changed.

  In step B3, the controller 7 starts a key scan. When the lock target key is pressed, the key press is detected in step B4, and the restriction key information is stored in the memory 6 in step B5. Steps B3 to B5 are repeated each time a key desired to be restricted is pressed.

  When all the pressing of the lock target key is completed, the lock function setting switch 5 in step B6 is turned off (pressed again). At the same time, in order to indicate that the lock function setting mode has been released, the process proceeds to step B14, and the blinking of the LED unit 4 is stopped.

  As described above, the display specifications of the LED unit 4 can be arbitrarily changed. At the same time, the process proceeds to step B 7 where the controller 7 creates a key map for the lock mode from the pressed key information stored in the memory 6. The key map described here is information in which the pressed key and the key code sent to the electronic device 2 are associated with each other. A specification that has two key maps on the memory 6, that is, a key map in the normal mode and a key map in the lock mode referred to in step B 7, and a specification in which the key map to be referred to on the memory 6 can be changed in the state of the lock switch 5. To do.

  The key map in the lock mode is created so that the key code is not sent to the pressed key based on the key map information in the normal mode and the key press information pressed in the lock function setting mode. Yes (Do not define the key code corresponding to the key). The controller 7 reads the key map in the lock mode from the memory 6, and the setting of the new lock mode in step B8 is completed.

  Thereafter, the operation in the lock mode is performed. After the next step B9, the flow is to release the lock mode with key input restriction. The lock switch 5 is turned off in step B9 and the lock mode is released in step B10. However, unless the lock switch 5 is turned off, the lock mode state is maintained.

  If the lock switch 5 is on, the input device can be used while the lock mode is maintained. When the lock switch 5 is turned off, the lock mode is released and the operation is performed in the normal mode. Even when the lock mode is released, the key map at the time of lock is held in the memory 6, and even when the lock switch is turned on next time, the key map at the previous lock mode is operated.

  Referring to the flowchart of FIG. 5, the process proceeds to “NO” in step B1, reads the key map at the time of locking previously set in step B11, proceeds to step B12, and operates in the lock mode. By controlling the key code sent from the input device 1 side, it is possible to reliably prevent erroneous key input as compared with processing such as mask processing by software such as an application on the electronic device 2 side.

  As described above, according to the first embodiment of the present invention, since the key code that is not output is set by simply pressing the target key, the key code that is not output can be arbitrarily and easily set. Can be set to In addition, since the configuration includes one key map for the normal mode and one for the lock mode, it is easy to switch between the key map for the normal mode and the key map for the lock mode.

  Next, a second embodiment will be described. FIG. 6 is a configuration diagram of the second embodiment of the input device according to the present invention. For convenience, the electronic device 2 not included in the input device is displayed together with the input device in FIG.

  Referring to the figure, the input device 1 according to the second embodiment includes a key unit 3, an LED unit 4, lock switches 5a and 5b similar to those in the first embodiment, and a control controller of the input device 1. 7, a memory 6, a program storage unit 12, and a key code transmission control controller 8 added in the second embodiment. A configuration including the control controller 7 and the key code transmission control controller 8 is the control unit 103 in FIG.

  In the first embodiment described above, the controller 7 and the memory 6 connected thereto have a key map dedicated to the lock mode, and the means (not shown) transmits the pressed key and the corresponding key code. The transmission of the key code was controlled. On the other hand, in the second embodiment, by providing the key code transmission control controller 8, when the key code transmitted from the control controller 7 is a lock target key, the key code transmission control controller 8 stores the memory 6. The key code is converted into a dummy key code and transmitted to the electronic device 2.

  The purpose of converting to a dummy key code is that the key code transmission control controller 8 is a bidirectional interface. Therefore, when the key code control controller 8 stops the key code transmission, the communication between the controller 7 and the key code control controller 8 is performed. Cannot be established and normal transmission cannot be performed. In order to avoid this, a dummy key code prepared in advance as a system is used. Further, unlike the first embodiment, in the second embodiment, a general-purpose keyboard microcomputer or the like can be used for the controller 7.

  The memory 6 stores key code and lock target key information. By holding these pieces of information in the memory 6, it is possible to determine whether the key needs to be converted into a dummy key code. Further, the key code controller 8 converts the key code of the lock target key into a dummy key code, thereby enabling the same operation as not transmitting the key code of the first embodiment. In other words, sending the dummy key code produces the same effect as when there is no key input in the electronic device 2.

  Next, the operation of the second embodiment will be described. First, the on / off operation of the lock switch will be described. FIG. 7 is a flowchart showing the on / off operation of the lock switch according to the second embodiment. The following operations are executed by the controller 7 controlling the key code transmission controller 8, the key unit 3, and the LED unit 4.

  Whether the lock switch is on (step D1), ski scan (step D2) in normal mode, and key code transmission (step D3) are the same as those in the first embodiment. . Also, the lock function setting (step D4) when the lock switch is turned on performs almost the same operation as in the first embodiment (details will be described later with reference to FIG. 8). The difference from the first embodiment is the operation after step D5.

  If a key press is detected in the key scan in step D5, the process proceeds to step D6. In step D6, it is determined whether or not the pressed key is a lock target key. If it is not a lock target key ("NO"), the process proceeds to step D8. In step D8, since the key code transmission controller 8 transmits the key code transmitted from the controller 7 to the electronic device 2 as it is, there is no difference from the case of operating in the normal mode.

  On the other hand, if “YES” (is the lock target key) in step D6, the process proceeds to step D7. In step D7, the key code transmission controller 8 refers to the memory 6 and transmits a dummy key code prepared in advance as a system to the electronic device 2. The electronic device 2 that has received the dummy code does not perform any input operation. That is, the operation of the electronic device 2 is the same as when there is no key input.

  Here, the reason for transmitting the dummy key code is that, as described above, when the key code transmission controller 8 stops the transmission of the key code, the input device 1 and the electronic device 2 have a bidirectional interface. This is because communication between the controller 7 and the key code controller 8 cannot be established, leading to malfunction. By transmitting a dummy key code, a series of operations from transmission to response can be performed, and normal operation can be performed.

  Next, the lock function setting will be described. FIG. 8 is a flowchart showing the operation of setting the lock function in the second embodiment. The basic operation is the same as that of the first embodiment shown in FIG. The difference from the first embodiment is the information stored on the memory 6 in step C7. A list of keys for transmitting the dummy key code is created and stored in the memory 6 so that the lock target key transmits the dummy key code.

  As described above, according to the second embodiment of the present invention, information in which the pressed key and the key code of the lock target key are associated with each other is held in the memory 6, and when there is a key input, By converting the key code of the key to be locked into a dummy key code and sending it to the electronic device 2 from the key code sending control controller 8, it becomes possible to reliably prevent erroneous key input.

  Next, a third embodiment will be described. The third embodiment relates to a program for an erroneous input prevention method. As described above, the input device shown in FIG. 3 includes the program storage unit 11, and the program storage unit 11 stores the program of the erroneous input prevention method shown in FIGS. The controller 7 shown in FIG. 3 reads the programs from the program storage unit 11 and controls the key unit 3, the LED unit 4 and the memory 6 according to the programs. Since the contents of the control have already been described, description thereof is omitted here.

  Further, as described above, the input device shown in FIG. 6 includes the program storage unit 12, and the program storage unit 12 stores the program of the erroneous input prevention method shown in FIGS. The controller 7 shown in FIG. 6 reads the programs from the program storage unit 12 and controls the key unit 3, the LED unit 4, and the key code transmission control controller 8 according to the programs. Since the contents of the control have already been described, description thereof is omitted here.

  As described above, according to the third embodiment of the present invention, a key code or a dummy key code that is not output can be set arbitrarily and easily, and a key map in the normal mode and a lock mode can be set. It is possible to obtain a program of an erroneous input prevention method that can be easily switched to a key map at the time.

1 Input device
2 Electronic equipment
3 Key part
4 Display 5, 5a, 5b Lock switch
6 memory
7 Control controller
8 Key code sending controller 11, 12 Program storage
100 input devices
101 Key part
102 memory
103 Control Unit 104a First Switch 104b Second Switch

Claims (12)

A key unit, a memory that stores a key code corresponding to the key of the key unit, a control unit that reads out and outputs the key code corresponding to the pressed key from the memory, and operates the control unit in a normal mode or A first switch for switching to the lock mode; and a second switch for switching the operation of the control unit to ON or OFF of the lock function setting,
When the lock mode and the lock function setting are on, the control unit stores a key code corresponding to a pressed key as a key code not to be output or converted into a dummy key code in the memory, and the memory In the input device, pressed key information corresponding to the normal mode and the lock mode is stored.   The control unit is configured to input a key controller that outputs a key code corresponding to a pressed key, and the key code output from the control controller, and the normal mode corresponding to the key code input with reference to the memory The input device according to claim 1, further comprising: a key code transmission control controller that outputs a key code of the lock mode or a dummy key code of the lock mode.   The input device according to claim 1, further comprising a display unit that is driven in the lock mode.   4. The input device according to claim 1, wherein the function of the second switch is enabled when the first switch is set to a lock mode. 5. A key unit, a memory that stores a key code corresponding to the key of the key unit, a control unit that reads out and outputs the key code corresponding to the pressed key from the memory, and operates the control unit in a normal mode or A first switch for switching to the lock mode; and a second switch for switching the operation of the control unit to ON or OFF of the lock function setting. Further, the memory stores the pressed key information corresponding to the normal mode and the lock mode. A method for preventing erroneous input in an input device,
A lock function setting step in which, when the lock mode and the lock function setting are on, the control unit stores a key code corresponding to a pressed key as a key code not to be output or converted into a dummy key code in the memory An incorrect input prevention method characterized by including:   The control unit is configured to input a key controller that outputs a key code corresponding to a pressed key, and the key code output from the control controller, and the normal mode corresponding to the key code input with reference to the memory 6. A method of preventing erroneous input according to claim 5, further comprising: a key code transmission control controller for outputting a key code of the lock mode or a dummy key code of the lock mode.   The erroneous input prevention method according to claim 5, further comprising a display unit that is driven in the lock mode.   8. The erroneous input prevention method according to claim 5, wherein the function of the second switch is enabled when the first switch is set to the lock mode. A key unit, a memory that stores a key code corresponding to the key of the key unit, a control unit that reads out and outputs the key code corresponding to the pressed key from the memory, and operates the control unit in a normal mode or A first switch for switching to the lock mode; and a second switch for switching the operation of the control unit to ON or OFF of the lock function setting. Further, the memory stores the pressed key information corresponding to the normal mode and the lock mode. A program for preventing erroneous input in an input device,
A lock function setting that causes the control unit to store a key code corresponding to a pressed key as a key code not to be output or converted into a dummy key code and stored in the memory when the lock mode and the lock function setting are on. A program for executing steps.   The control unit is configured to input a key controller that outputs a key code corresponding to a pressed key, and the key code output from the control controller, and the normal mode corresponding to the key code input with reference to the memory The program according to claim 9, further comprising: a key code transmission control controller that outputs a key code of the lock mode or a dummy key code of the lock mode.   11. The program according to claim 9, further comprising a display unit that is driven in the lock mode.   12. The program according to claim 9, wherein the function of the second switch is enabled when the first switch is set to the lock mode.

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