JPS6295624A - Matrix key device - Google Patents

Abstract

PURPOSE:To prevent the actions performed by the key operations by providing a signal supply means to a key matrix device for supply of a prescribed signal. CONSTITUTION:When an operation inhibiting connection switch 7 is opened,a matrix key device is set under an active state with all key operations. Then the 1st matrix signal output port 2a and the 1st and 2nd matrix signal signal input ports 3a and 3b of a CPU 1 are set under a conductive state when the switch 7 is set under a connecting state. Under such conditions, the pulse signal delivered from the port 2a is supplied to both ports 3a and 3b at a time. Then both connection switches 5a and 5b are set under a double-push state at a time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a matrix key device suitable for use in, for example, a key device of an electronic computer.

[Summary of the invention]

The present invention is a matrix key device suitable for use in a computer key device, etc., and includes a plurality of keys arranged in a matrix and a signal processing means.

When any one of the plurality of keys is operated, a predetermined signal is supplied to any one of the IJ signal input terminals of the multi-signal processing means, and the operation based on the key operation is performed by supplying this predetermined signal. When the signal processing means performs the process and a predetermined signal is simultaneously supplied to two or more of the plurality of matrix signal input terminals by simultaneous operation of two or more of the plurality of keys Rj, or one of the plurality of matrix signal input terminals. In a matrix key device in which the signal processing means does not perform an operation based on a key operation when a plurality of predetermined signals are supplied to a plurality of matrix signal input terminals, By providing a signal supply means for supplying a predetermined signal or supplying a plurality of predetermined signals to one location of the IJ signal input terminal, it is possible to prohibit the key operation of this signal supply means, and to prevent signal supply. Erroneous key operations can be prevented with a simple configuration that only requires a means.

[Conventional technology]

2. Description of the Related Art Conventionally, a matrix key device as shown in FIG. 7 has been used for a keyboard such as a numeric keypad of an electronic computer. In the key device shown in FIG. 7, key operations are determined by a central processing unit (CPU) (1) which is a microcomputer. That is, C.P.
U (1) 1st. Second and third matrix signal outputs/-) (2a), (2b) and (2c) respectively. Second and third diodes (4m).

(4b) and (4c) are connected to the anodes of the first. Second
and third diodes (4a), (4b) and (4
c) Three candos each vertically! Trix line! 1
+ Connect to x2 and x3. Then, each key (5 m' )
y (5b')...the first corresponding to (51). Second
...12th connection switch (5m), (5b)・
...(5t) and four horizontal matrix lines 71
p )'2 e The 13th. 14th. 15th and 16th connection switch (6
a) a (6b) p The first . Second. 3rd and 4th matrix signal input capo) (3m), (3b), (3c
) and (3d). and 13th to 16th connection switches (6m).

When (6b), (6a) and (6d) are in the connected state, each key (5a') e (sb') ++ (
the law of nature! By pressing any one of the corresponding connection switches (5a), (5b), . . . (5t), the corresponding connection switch (5a), (5b), ... (5t) becomes connected. For example, a key indicating the number rlJ (5a
'), the first connection switch (5a) is not connected and the first matrix signal ratio capo) (
2m) and the first matrix signal input port (3a) are brought into conduction. Here, the matrix signal ratio capo)
The output signals from (2m), (2b), and (2c) are controlled by a data judgment circuit (1m) provided in the CPU (1), and as shown in FIG. 9A, B, and C, each output ?
- (2m) + The output of the pulse signal is repeated in order for each (2b) and (2c). Therefore, when the first connection switch (5a) is in the connected state, the first output --)
The pulse signal output from (2m) is the first input port)
(3m), and as shown in Figure 9, the same pulse signal as the pulse signal outputted from the first output port (2a) to the first input port (3m) is obtained. This first
The pulse signal obtained at the input f-) (3m) is supplied to the data judgment circuit (1a) via the latch circuit (lb) and the register (lc), and the data judgment circuit (1a)
1st incoming capo) (3m) and 1st outgoing capo) (2m)
It is determined that the key (5a') indicating the number "1" has been pressed by detecting that a pulse signal outputted from the controller is obtained. In this way, each key (5a'), (5b')...
By determining the operation of key (51), for example, data corresponding to this key operation is output from data output key (ld).

On the other hand, in general, an IJ key device configured as described above has two or more data judgment circuits (1a) in the CPU (1), for example, in order to prevent malfunctions when two or more keys are pressed at the same time. When determining the simultaneous operation of keys,
Based on the judgment of this judgment circuit (1m), the structure is such that operations such as data output due to key operations are not performed at all.

[Problem that the invention seeks to solve]

By the way, in general, a matrix key device configured as shown in the example shown in FIG. 7 tends to be required to disable key operations as necessary in order to prevent erroneous operations due to careless key operations when no operation is required. In the case of this example in Fig. 7, the 13th to 16th connection switches (
6a), (6b) * (6c) and (6d) are provided, and when the operation is prohibited, the 13th to 16th connection switches (6m) # (sb) * (6e) and (6d
) is open. By doing this, even if you operate each key (5a'), (5b and (5t), the CP
Matrix signal input port (3a) of U (1) *
(3b).

(3c) There is no pulse signal input to and (3d), making it impossible to operate.

However, in the case of a configuration like the example in FIG. 7, the vertical or horizontal matrix lines 11 e X2 s X5 or y11
72, '151) '4 connection switches (6
a), (6b).

(6c) and (6d) must be connected, which has the disadvantage of requiring a large number of connection switches. In particular, when used for key dates with a large number of keys, such as a keyboard for inputting characters such as the alphabet, there is a drawback that a large number of connection switches are required to prevent erroneous operation.

In view of the above, an object of the present invention is to provide a matrix key device having a simple configuration and capable of prohibiting input by key operations.

[Means for solving problems]

The IJ key device of the present invention has a plurality of keys arranged in a matrix and a signal processing means (1), as shown in FIG. A predetermined signal is supplied to any one of the plurality of matrix signal input terminals (3a) # (3b) e (3c) - and (3d) of the processing means (1), and by supplying the predetermined signal, The signal processing means (1) performs the operation, and multiple matrix signal input terminals (3 &) are activated by simultaneous operation of multiple keys at 2 degrees or more.
t (3b) e When a predetermined signal is supplied to two or more of (3c) and (3d) in unison, or when a plurality of matrix signal input terminals (3m), (3b), (3e
) and (3d) in a matrix key device in which the signal processing means (1) does not perform an operation based on a key operation when a plurality of predetermined signals are supplied to one location of (3d). Terminals (3a), (3b)
.

(3c) and (3d) 21! Supply a predetermined signal in accordance with one or more locations or multiple terminals) IJ signal input terminal (3
m).

Signal supply means (7), (8a) for supplying a plurality of predetermined signals to one location of (3b), (3a) and (3d)
e (8b).

[For production]

The IJ key device of the present invention includes a signal supply means (7).
), (8m), (8b), multiple matrix signal input terminals (3a) = (3b), (
A plurality of matrix signal input terminals (3m), which supply predetermined signals to two or more locations of 3c) and (3d) in unison;
By supplying a plurality of predetermined signals to one of (3b), (3c), and (3d), the state is the same as the 2TL pressing state of the key, and the signal processing means (1) prohibits the operation by key operation. signal supply means (7) e (8a)
+ (8b) It is possible to prevent erroneous key operations with a simple configuration.

[Metal practice]

Hereinafter, one embodiment of the non-inventive matrix key device will be described with reference to FIGS. 1 and 2. This figure 1 and 2
In the figures, parts corresponding to those in FIGS. 7 to 9 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

In the matrix key device of this example, the anode side is connected to the CPU (
The cathode of the first diode (4a) connected to the first matrix signal output port (2a) of 1) is connected to one contact (7a) of the operation prohibition connection switch (7). The other contact (7) of this operation prohibition connection switch (7)
b) as the fourth and fifth diodes (8a) and (8b)
and connect the cathode of the fourth diode (8a) to the CPU via the first horizontal matrix line y.
(1) is connected to the first matrix signal input port (3a), and the cathode of the fifth diode (8b) is connected to the second matrix signal input port (1) of the CPU (1) through the second horizontal matrix line y2. Connect to date (3b). The rest of the structure is similar to the matrix key device shown in FIG. 7 as a conventional example.

With the above configuration, when the operation prohibition connection switch (7) is opened, the same key operation as in the conventional example shown in FIG. 7 is performed.

When the operation prohibition connection switch (7) is connected, the CPU (1)'s first matrix signal output /-) (2m) and the first and second matrix signal type capo) C3&) and ( 3b) becomes electrically connected.

Therefore, the pulse signal output from the first matrix (IJ signal output capo) (2m) as shown in FIG. 2A is transmitted to the first and second matrices as shown in FIGS. Signal input capo) (3a) and (3b) are simultaneously supplied, and the first connection switch (5a) and the fourth connection switch (5d) are connected at the same time, which is the same as creating a double-pressed state. The state will be as follows. Therefore, when this Noculus signal is input to the data determination circuit (1a) of the CPU (1), it is determined that a double-pressing state has occurred, and the operation of each key is prohibited, resulting in a state in which no operation is possible. In this way, the configuration according to this example has a simple configuration that only connects one operation prohibition connection switch (7) and two diodes (8a) and (8b), and prohibits operation by key operation. It is possible to prevent malfunctions.

In addition, in the above embodiment, the operation prohibition connection switch (7)
One contact (7m) of the IJ signal output port (2a) is connected to the side of the IJ signal output port (2a), but for example, as shown in Fig. 3, one contact (7m) of the power terminal (9) and the connection switch (7)
) is connected, and when this connection switch (7) is in the connected state, the signal of a constant level obtained at the power supply terminal (9) is simultaneously applied to the first and second matrix signal inputs as shown in Figure 4. Capo) (aa) and (3b) may be supplied to inhibit the operation. As shown in FIG. 5, connect the cathode of the first diode (4a) to the anode of the sixth diode (10a),
The cathode of the second diode (4b) is connected to the 7 node of the seventh diode (10b), and the cathode of the sixth and seventh diodes (10a) and (lob) are connected to one of the connection switches αυ for inhibiting operation. It is also possible to connect the other contact point of the connection switch α to the first matrix signal input port (3m). In the case of the configuration shown in FIG. 5, when the connection switch Ql) is in the connected state, the first and second matrix signals are output to the first matrix signal input port (3m) as shown in FIG. The pulse signals output from both capo (2m) and (2b) are supplied, and the state is the same as when the key is double pressed, and operation by key operation is prohibited. Furthermore, it goes without saying that the present invention is not limited to the above-described embodiments, and that various other configurations can be made without departing from the gist of the present invention.

〔Effect of the invention〕

According to the matrix key device of the present invention, the signal supply means (7
) # Operation by key operation can be inhibited by supplying a predetermined signal by operating (8a) - (8b), and a simple configuration that only requires signal supply means (7) p (8a) and (8b) is used. This has the advantage that operations can be prohibited based on key operations, and erroneous operations can be prevented.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing one embodiment of the matrix key device of the present invention, FIG. 2 is a diagram for explaining the example in FIG. 1, and FIGS. 3 and 5 are respectively other embodiments of the present invention. A configuration diagram showing
FIG. 4 is a diagram for explaining the example in FIG. 3, FIG. 6 is a diagram for explaining the example in FIG. 5, and FIGS. 7 and 8 are configuration diagrams showing an example of a conventional matrix key device. , FIG. 9 is a diagram for explaining the example in FIG. 7. (1) is the CPU, (3a), (3b), (3
c) and (3d) IJ signal input terminal, (7) is a connection switch for inhibiting operation, (8a) and (
8b) It is an H diode. B 2nd/l Chukahoto 2b -m- "]-]11--
--f=L--------11-F3rd input boat 3c book,-f@moon matrices 2s-device n-i-death 1! Type! 1
Figure 5

Claims (1)

[Scope of Claims] It has a plurality of keys arranged in a matrix and a signal processing means, and when any one of the plurality of keys is operated, one of the plurality of matrix signal input terminals of the signal processing means is selected. A predetermined signal is supplied to the plurality of matrix signal input terminals, and the signal processing means performs an operation based on the key operation by supplying the predetermined signal. The signal processing means does not perform an operation based on a key operation when a predetermined signal is supplied to more than one location or when a plurality of predetermined signals are supplied to one location of the plurality of matrix signal input terminals. In the matrix key device, a signal is supplied that coincidentally supplies a predetermined signal to two or more of the plurality of matrix signal input terminals, or supplies a plurality of predetermined signals to one of the plurality of matrix signal input terminals. A matrix key device characterized in that a means is provided.