JPH0445057Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a keyboard device in which a plurality of key switches are arranged in a matrix, and particularly relates to the arrangement of a key switch matrix.

[Conventional technology]

Conventionally, in this type of keyboard device, various keys for inputting characters, numbers, symbols, etc. are arranged on the keyboard. In this circuit section, key switches corresponding to the respective keys are arranged in a matrix at the intersection of the scan line and the return line, forming a key switch matrix.

By the way, in the key switch matrix, when a plurality of keys are pressed at the same time, a loop circuit is formed between the closed key switches.
A wraparound current occurs. Therefore, a problem arises in which a key switch that has not been pressed is mistakenly recognized as being pressed.

Therefore, in order to solve this problem, we
The invention described in the -39332 publication has been devised.

In this conventional example, as shown in Fig. 2, keys 1 pressed by the same finger all have the same scan line.
They are arranged corresponding to _S0 to _S7 or return lines _R0 to _R7 .

Therefore, in normal key operations, only one key 1 is operated or pressed with the same finger.
That is, even if multiple keys 1 are pressed, each return line R ₀ to R ₇ or each scan line S ₀
~S Only one key 1 is pressed for ₇ .

Therefore, there is no current leakage, and all pressed key switches 2 can be recognized normally.

[Problem that the invention attempts to solve]

However, in such a conventional example, the arrangement of the key switch matrix is conditioned to match the key operations of the operator.
Therefore, as shown in Figure 2, the number of keys assigned to the second finger of each of the right and left hands is approximately twice as many as the number of keys assigned to the third, fourth, and fifth fingers. become a number.

Therefore, as shown in FIG. 2, there is a problem that waste is generated on the key switch matrix, and furthermore, the substrate pattern for forming the key switch matrix is subject to severe restrictions on connection with the key switch.

The above problem will be explained below by giving a specific example. Here, the membrane keyboard described in Japanese Utility Model Application Publication No. 56-165328 will be taken as an example.

In this conventional example, a key switch electrode and a connection pattern are printed on a polyester sheet using silver paste, carbon ink, etc., and the two sheets are overlapped with a spacer interposed therebetween. The key switch electrodes and connection patterns for scan lines and return lines are formed on one side of each polyester sheet.

In such a membrane keyboard,
When the key switch matrix shown in FIG. 2 is actually formed as a pattern, it becomes as shown in FIGS. 3a and 3b.

As shown in Figure 3b, the scan lines S ₀ to _{S 3}
is routed by bypassing scan lines S ₄ to _{S 7} ,
Eight key switches assigned to the operator's left and right second fingers can be connected.

Therefore, patterns of scan lines S ₀ to _{S 3} are laid out in the vertical direction. This makes it technically difficult to wire any more scan lines between the key switch electrodes 3.

Therefore, when forming a wiring pattern for a shift key or a space key, it is necessary to form it as shown in FIGS. 4a and 4b.

Here, the scan line S _s for the shift key and the space key is formed outside the scan lines S ₀ to _{S 7} as shown in FIG. 4a, and is connected to the key switch electrodes 4 and 5 for the shift key and the space key.

Therefore, the size of the polyester sheet (or substrate) of the keyboard device increases. moreover,
Problems arise in that the dimensions of the keyboard device become large, which impairs its aesthetic appearance and increases manufacturing costs.

The present invention was made to solve the above problem, and its purpose is to prevent erroneous recognition of keys caused by pressing multiple keys at the same time, and to
To provide a keyboard device with a simple and inexpensive configuration.

[Means for solving problems]

In order to solve this problem, the present invention provides a key switch matrix having key switches connected to the intersections of the matrix consisting of a plurality of columns and rows, a means for selecting a row or a column of the key switch matrix; It has a means for reading the state of a key switch in a selected row or column, and a key switch matrix of each operation key operated with the same operation finger is connected on the same row or column, so that when the operation key is pressed, In a keyboard device that performs key switch input processing, the key switch matrix of keys operated by more operating fingers than other operating fingers is divided into multiple parts, and the key switch matrix for each division unit is the same. Characterized by being connected in rows or columns.

[Effect]

In the present invention having the above-mentioned characteristics, even if an operator operates a plurality of key switches at the same time, only one key switch is operated on the same row or column.

Therefore, no current wraparound circuit is formed, no wraparound current is generated, and the pressed/released states of all key switches are correctly recognized.

Furthermore, as described above, the key switch matrix of keys operated with more operating fingers than other operating fingers is divided into multiple parts, and the key switch matrix for each division unit is arranged in the same row or column. This eliminates the need for complicated wiring, which is required when connecting the key switch matrices of each operation key operated with the same finger on the same row or column, as in the past. Since the structure can be simplified, manufacturing becomes easier, and this also makes it possible to reduce the size and cost.

〔Example〕

An embodiment of the present invention is shown below in Fig. 1, Fig. 5a,
b, will be explained based on FIGS. 6a and b.

Fig. 1 is a configuration diagram showing an embodiment of the present invention showing the key switch matrix and key arrangement, and Fig. 5 is a wiring diagram of an embodiment of the present invention, where a is a wiring diagram of the return line and b is a wiring diagram of an embodiment of the present invention. It is a wiring diagram of a scan line.

In FIG. 1, key switches 6 are connected to the intersections of return lines R ₀ -R ₉ and scan lines S ₀ -S ₃ to form a key switch matrix. Moreover, each of the above-mentioned return lines R ₀ ~
Key switches 6 of the same row operated with the same operating finger are respectively connected to _R9 .

Each of the keyswitches 6 is assigned a key 7 which is arranged in a plurality of columns and rows.
For example, a key 7 operated by the fifth finger of the left hand is assigned to a key switch 6 on the return line _R0 . A key 7 operated by the fourth finger of the left hand is assigned to the key switch 6 on the return line _R1 . A key 7 operated by the third finger of the left hand is assigned to the key switch 6 on the return line _R2 . Return lines R ₃ and R ₄
A key 7 operated by the second finger of the left hand is assigned to the upper key switch 6.

Therefore, even if the operator operates a plurality of keys 7 at the same time, only one of the key switches 6 connected to the same return line S ₀ to S ₉ will operate.

Therefore, no current wraparound circuit is formed, no wraparound current is generated, and the pressed/released states of all the key switches 6 can be correctly recognized.

Further, the eight keys 7 assigned to the left and right second fingers are divided into four keys and assigned to the key switch electrodes 8 of each return line _R3 to _R7 .

Therefore, it is no longer necessary for all the key switches assigned to each finger to be connected to the same return line or scan line as in the conventional example.

As a result, return lines R ₀ to R ₉ and scan lines S ₀ to _{S 3} as shown in FIGS. 5a and 5b can be formed, and there is no need for detouring and wiring as in the conventional example. That is, the return line R ₀ ~
R ₉ and scan lines S ₀ to _{S 3} are a simple wiring pattern that is unified vertically and horizontally.

FIG. 6 ab is a wiring diagram when a shift key and a space key are provided, a is a wiring diagram of a return line, and b is a wiring diagram of a scan line.

In FIG. 6, as described above, the return lines R ₀ to R ₉ and the scan lines S ₀ to _{S 3} have a simple wiring pattern that is unified vertically and horizontally.
Therefore, the return line R _s and scan line S _s for the shift key and space key can be wired and connected to the key switch electrode 9 without increasing the dimensions of the polyester sheet (or the dimensions of the substrate).

In this embodiment, the key switches 6 operated with the same operating finger are connected to the same return lines _R0 to _R9 , but the same return lines
Instead of connecting to _R0 to _R9 , they may be connected to the same scan lines _S0 to _S3 . Also,
In this embodiment, the key switches 6 are operated with the same operating finger and are arranged in the same column, but the key switches 6 may be arranged in the same row instead of the same column.

That is, in the present invention, key switches in the same column or row operated by the same operating finger are connected to the same return line or scan line.

[Effect of idea]

As explained above, the present invention divides the key switch matrix of keys operated by more fingers than other operating fingers into multiple parts, and divides the key switch matrix for each divided unit into the same row. Alternatively, in a configuration where the keys are connected in columns, even if the operator operates multiple keys at the same time, only one key switch will operate in the same column or row, so no current wraparound circuit is formed. This provides the advantage that the pressed/released states of all key switches can be correctly recognized.

Furthermore, according to the configuration of the present invention, there is no need for complicated wiring, which is required in the conventional case where key switch matrices corresponding to fingers that operate many keys are all connected on the same row or column. Since the wiring pattern can be simplified, it is possible to obtain the effect that manufacturing is facilitated, and this also provides the effect that it is possible to achieve miniaturization and cost reduction.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing one embodiment of the present invention;
The figure is a configuration diagram of a conventional example, Figure 3 is a wiring diagram of a conventional example,
Figure 4 is a wiring diagram when a shift key and space key are provided, Figure 5 is a wiring diagram of an embodiment of the present invention,
FIG. 6 is a wiring diagram when a shift key and a space key are provided. 6...key switch, 7...key, 8,9...
Key switch, S ₀ ~ S ₃ , S _s ... scan line,
_R0 to _R9 , _Rs ...Return line.

Claims (1)

[Claims for Utility Model Registration] For a key switch matrix provided with key switches connected to the intersections of a matrix consisting of a plurality of columns and rows, a means for selecting a row or a column of the key switch matrix; Each key switch matrix has a means for reading the state of a key switch in a row or column, and operation keys operated with the same operating finger are connected on the same row or column, so that when the operation key is pressed, the key switch is activated. In a keyboard device that performs input processing, the structure of the key switch matrix of keys operated by more fingers than other operating fingers is divided into multiple parts, and the key switch matrix for each division unit is divided into the same key switch matrix. A keyboard device characterized by being connected in rows or columns.