JPH09160706A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the diode in a conventional equipment and to reduce the cost and the space in a keyboard device which can increase the number of keys double by using a keyboard processor KBP that contains a standard key matrix KS and an extension key matrix KE and can judge one of both matrices, to which a pressed key belongs, based on the presence or absence of a scan signal to be supplied to an extension key matrix designation port E. SOLUTION: One of both ends of a keyboard device is extended to plural extension keys respectively to secure the mutual conduction to the scan signal output line EO0 to EO7 and input lines EI0 to EI3 when the conduction is secured between there output and input lines with each push of extension keys K33 to K64. At the other end of the keyboard device, the scan signals are inputted to an extension key matrix designation port E from the extension keys via the extension scan signal input lines L1 to L32 of the same number as the extension keys which are connected en bloc to the port E.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device having an extended key matrix, and more particularly to a keyboard device in which keys are expanded without an external diode for cost reduction and space saving.

[0002]

2. Description of the Related Art In recent years, OA (Of
Fice Automation) equipment is remarkably widespread, but keyboards are often used as input devices for these personal computers and the like.

This keyboard has 10 from 0 to 9
There are 10 keyboards provided with numbers, and alphanumeric keyboards obtained by adding 26 letters of the alphabet to the above 10 numbers. Usually, a keyboard including keys added for each purpose is used for these basic key arrangements, and in general, a personal computer in Japan uses a JIS layout keyboard. This is a kana assigned to an ASCII array for alphanumeric characters. In addition to the above, there are those that use a special kana arrangement exclusively for word processors, and those for personal computers that have a special key arrangement assigned to the left and right, such as a TRON keyboard.

If the number of keys on the keyboard is limited, one control code may be input by pressing a plurality of keys, but if more keys are arranged, the number of key touches is reduced. It is possible to send various commands and data to the computer.

For this reason, when there is a standard key matrix in which, for example, 32 keys are arranged in a matrix, an expansion key can be additionally installed without increasing the number of input / output ports corresponding to the expanded number of keys. Keyboard processors are emerging.

It is possible to provide an extended key matrix having the same number of keys as the standard key matrix or a number of keys equal to or less than the number of keys, and which extended key matrix judgment port the pressed key belongs to. FIG. 6 is a circuit diagram of a conventional keyboard device which is a keyboard processor which can be determined by the presence or absence of a signal to the keyboard.

In FIG. 6, KS is a standard key matrix comprising 32 standard keys K1 to K32, KE
Is an extended key matrix comprising 32 extended keys K33 to K64, DL0 to DL3 and DR0 to DR3 are diodes.

KBP is a keyboard processor, which has eight scan signal output ports D0 to D7, four scan signal input ports G0 to G3, an extended key matrix determination port E, a key identification result output port OUT, and a pressed key. And specifying means (not shown).

FIG. 7 is a circuit diagram showing the details of the respective standard keys K1 to K32 in FIG. 6, and FIG. 8 is each expansion key K33 in FIG.
It is a circuit diagram which shows the detail of-K64. FIG. 9 is a configuration diagram showing the details of the standard keys K1 to K32 and the expansion keys K33 to K64 in FIG. 6, (a) is a partially omitted plan view, (b)
[Fig. 3] is a cross-sectional view taken along the line bb in Fig. (A).

7 to 9, Km is a standard key (m = 1 to 32), Kn is an expansion key (n = 33 to 64), and 91 is connected to the output port D (D0 to D7). A first fixed contact, 92 is a second fixed contact connected to the input port G (G0 to G3), and 93 is pressed at the time of a key operation to conduct (short circuit) between the first fixed contact 91 and the second fixed contact 92. It is a movable contact. In addition, the same reference numerals as those in FIG. 6 indicate the same or corresponding portions.

In such a conventional apparatus, the pressed keys K1 to K64 are specified by the keyboard processor KBP.
This is performed as follows by the pressed key specifying means. That is, the standard keys K1 to K32 are specified by determining which of the scan signal input ports G0 to G3 the scan signal having the same phase as the scan signal output from the scan signal output ports D0 to D7 is input. Be seen.

The expansion keys K33 to K64 are specified when a scan signal having the same phase as the scan signal output from the scan signal output ports D0 to D7 is input to any of the specific scan signal input ports G0 to G3. It is performed by determining whether the scan signal of that phase is also input to the extended key matrix determination port E at the same time.

For example, now, the scan signal output port D2
The scan signal is input to the scan signal input port G1 at the timing when the scan signal is output from the
When no scan signal is input to the extended key matrix determination port E, it is determined that the standard key K10 is pressed.

Further, the scan signal is input to the scan signal input port G1 at the timing when the scan signal is output from the scan signal output port D2, and at the same time, the same scan signal is also input from the extended key matrix determination port E. In this case, it is determined that the expansion key K42 has been pressed.

[0015]

However, the above-mentioned conventional keyboard device has the following problems.

That is, assuming that there is no diode DL (DL0 to DL3) on the left side of the extended key matrix KE, if the extended key K42 is pressed, for example, at the timing when the scan signal is output from the scan signal output port D2. , The key K42 → equivalent to the diode DL1 → the point → the point B, the scan signal is input to the extended key matrix determination port E without any problem. But,
To the scan signal input port G (G0 to G3) side, the scan signal output port D2 → expansion key K42 → diode DL1
There was a case in which the scan signal was sneaked and input to the scan signal input port G0 through the corresponding portion → point A → point B → diode DL0 corresponding portion → diode DR0, and it was mistakenly judged that the expansion key K41 was pressed.

If it is assumed that the right side diode DR (DR0 to DR3) of the expanded key matrix KE is not present and the standard key K10 is pressed, the scan signal output port D2 outputs the scan signal at the timing. There is no problem in that the scan signal is input to the scan signal input port G1 through the key K10 and the point C in sequence. However, scan signal output port D2 → standard key K1
0 → point C → diode DR1 equivalent → diode DL1
→ The scan signal wraps around to the expanded key matrix judgment port E through the points a → b → and the expanded key K
Sometimes it was mistakenly judged that the 42 was pressed.

Therefore, in the keyboard device having the conventional extended key matrix KE, the use of the diodes DL0 to DL3 and DR0 to DR3 is unavoidable in order to prevent the unintended wraparound of the scan signal. In addition to increasing the number of parts and increasing the cost,
There is a problem that a printed wiring board becomes large in size because a space for disposing the diode is required.

It is an object of the invention of claim 1 to provide a keyboard device which can eliminate the diode, reduce the cost and save the space.

It is an object of the invention of claim 2 to provide a keyboard device capable of ensuring the operation of the extended key in the invention of claim 1.

[0021]

In order to achieve the above object, the invention of claim 1 provides a first scan signal output line group consisting of a plurality of scan signal output lines, and a first scan signal output line group. A first scan signal input line group consisting of a plurality of scan signal input lines intersecting each line in a matrix and the intersections of the scan signal output lines and the scan signal input lines, which are provided at the respective intersections to cross each other by pressing. A standard key matrix including a plurality of standard keys for electrically connecting a scan signal output line and a scan signal input line to each other, and a plurality of scans serially connected to each line of the first scan signal output line group. Second composed of signal output line
A scan signal output line group and a plurality of scan signal input lines that intersect each line of the second scan signal output line group in a matrix and are connected in parallel to each line of the first scan signal input line group. The second scan signal input line group is provided at each intersection of the scan signal output line of the second scan signal output line group and the scan signal input line of the second scan signal input line group. An expansion key matrix including a plurality of expansion keys for electrically connecting a scan signal output line and a scan signal input line to each other, and a phase for each line of the first scan signal output line group or the second scan signal output line group. And a scan signal output means for sequentially providing scan signals, and which scan signal input line the scan signal input means detects in-phase and A keyboard device comprising: a keyboard processor comprising: a pressed key specifying means for specifying a standard key or an expanded key pressed depending on whether a scan signal of the phase is also input to the expanded key matrix determination port at the same time. The introduction of the scan signal from the expansion key to the expansion key matrix determination port is performed so that when one end of each of the scan signal output line and the scan signal input line is electrically connected by pressing the expansion key, the scan signal output line and the scan signal input line are electrically connected to each other. It is characterized in that the plurality of extension scan signal input lines are extended to a plurality of extension keys and the other ends thereof are collectively connected to the extension key matrix determination port (the same number as the number of extension keys).

According to a second aspect of the present invention, the expansion keys of the first aspect are electrically connected to the movable contact and the first fixed contact on the scan signal output line side and the scan signal input line side, which are electrically connected to each other when the movable contact is pressed. A second fixed contact and a third fixed contact conducting to one end of the extended scan signal input line, the third fixed contact being at least on a line connecting the first fixed contact and the second fixed contact. , And is disposed between the first fixed contact and the second fixed contact.

According to the first aspect of the present invention, when one end of each of the scan signal output lines and the scan signal input lines is electrically connected by pressing the expansion key, the one end is extended to each of the plurality of expansion keys so as to be electrically connected to both lines. , By introducing the scan signal from the expansion key to the expansion key matrix judgment port by the plural (the same number as the expansion keys) expansion scan signal input lines whose other end is collectively connected to the expansion key matrix judgment port Even if the diode is removed, unintended wraparound of the scan signal can be prevented. This makes it possible to reduce costs and save space.

According to the second aspect of the invention, the third fixed contact of the expansion key, which is electrically connected to one end of the extended scan signal input line, is the first fixed contact on the scan signal output line side and the second fixed contact on the scan signal input line side. It was placed on the line connecting to and. According to this, when the first fixed contact and the second fixed contact are conducted by the movable contact, the third fixed contact is necessarily conducted simultaneously by the first fixed contact and the second fixed contact due to the structure. It will be.
Therefore, only the first fixed contact and the second fixed contact are electrically connected, the third fixed contact is not electrically connected to them, and the pressing of the expansion key is not mistakenly recognized as the pressing of the standard key. Can be ensured.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment in which a keyboard device according to the present invention is used in a remote control transmitter.

In FIG. 1, KS is a standard key matrix, a first scan signal output line group 1SO consisting of eight scan signal output lines SO0 to SO7, and each line SO0 to SO of this first scan signal output line group 1SO. Four scan signal input lines SI0 to S intersecting SO7 in a matrix
A first scan signal input line group 1SI made up of I3 and scan signal output lines at the intersections provided by being respectively pressed at the intersections of the scan signal output lines SO0 to SO7 and the scan signal input lines SI0 to SI3. 32 standard keys K1 to K3 for electrically connecting any of SO0 to SO7 to any of the scan signal input lines SI0 to SI3 and short-circuiting here.
2 and.

KE is an extended key matrix, which is the first key
Eight scan signal output lines EO0-E serially connected to the respective lines SO0-SO7 of the scan signal output line group 1SO
A second scan signal output line group 1EO consisting of O7 and the respective lines EO0 to EO7 of the second scan signal output line group 1EO intersecting in a matrix and the respective lines SI0 to SI3 of the first scan signal input line group 1SI. A second scan signal input line group 1EI composed of four scan signal input lines EI0 to EI3 separately connected, and scan signal output lines EO0 to EO7 and second scan signal input of the second scan signal output line group 1EO The scan signal output lines EO0 to EO7 and the scan signal input lines EI0 to EI3 at the crossing portions are electrically connected to each other by being provided at each crossing portion of the line group 1EI and the scan signal input lines EI0 to EI3, and short-circuited here. 32 expansion keys K33 to K64 are provided.

Further, in the present invention, the expansion keys K33 to K64 are used.
In order to introduce the scan signal to the expanded key matrix determination port E described later, 32 (the same number as the expanded keys) expanded scan signal input lines L1 to L32 are provided. One end of each of the extended scan signal input lines L1 to L32 is pressed by the extended keys K33 to K64, and the scan signal output line EO is pressed.
0 to EO7 and the scan signal input lines EI0 to EI3 are electrically connected to the expansion keys K33 to K64 so as to be electrically connected to these lines EO0 to EO7 and EI0 to EI3, respectively.
The other end is collectively connected to the expanded key matrix determination port E.

KBP is a keyboard processor, which has eight scan signal output ports D0 to D7, four scan signal input ports G0 to G3, an extended key matrix determination port E, a key identification result output port OUT, and a pressed key. And specifying means (not shown).

Here, the scan signal output port D0
.About.D7 are ports for sequentially outputting scan signals with different phases to the respective lines of the first scan signal output line group 1SO or the second scan signal output line group 1EO, and the scan signal input ports G0 to G3 are This is a port to which the scan signal from each line of the first scan signal input line group 1SI and the second scan signal input line group 1EI is input.

Further, the pressed key specifying means determines to which one of the scan signal input ports G0 to G3 a scan signal having the same phase as the scan signal output from the scan signal output ports D0 to D7 is input, and the phase thereof. The standard key Km is determined by determining whether the scan signal is also input to the extended key matrix determination port E at the same time.
(Any one of K1 to K32) and expansion key Kn (K33 to K64)
Identifies the pressed key in.

That is, the scan signal output ports D0 ...
Depending on which of the scan signal input ports G0 to G3 the scan signal having the same phase as the scan signal output from D7 is input, one key is estimated from the standard key Km and the expansion key Kn as a pressed key, and further, If the scan signal is also input to the extended key matrix determination port E at the same time, the pressed key estimated from the extended key Kn is used as the pressed key, and if not input to the extended key matrix determination port E, it is estimated from the standard key Km. The pressed keys are specified as pressed keys.

The key identification result output port OUT is provided with the identification result (K1
To K64) is output as a coded serial signal. Here, the signal from the key identification result output port OUT is modulated by a modulation circuit (not shown), converted to infrared light by the infrared light emitting circuit 11, and output to the outside.

VDD and VSS are DC power supply terminals, GND is a ground terminal, 12 is a DC power supply, and 13 is a clock oscillation circuit.

FIG. 2 is a circuit diagram showing the details of the respective expansion keys K33 to K64 in FIG. 1, and FIG. 3 is a circuit diagram showing the details of the expansion key matrix KE part in FIG. 4 is shown in FIG.
In the configuration diagram showing the details of each expansion key K33 ~ K64 in the inside,
(A) is a partially omitted plan view, (b) is bb in (a).
It is a line sectional arrow view. FIG. 5 shows each expansion key K33 to FIG.
It is a top view showing another example of a fixed contact pattern of a K64 portion.

2 to 5, Kn is an expansion key (n = 33 to 64), 41 is the output port D (D0 to D).
The first fixed contact connected to 7), 42 is the second fixed contact connected to the input port G (G0 to G3), and 43 is
The third fixed contact 44 connected to the expanded key matrix determination port E is a movable contact that is pressed at the time of key operation to mutually conduct the first to third fixed contacts 41 to 43 at the same time, and short-circuits here.

Reference numeral 45 denotes a printed wiring board having first to third fixed contacts 41 to 43 formed on the upper surface thereof, and reference numeral 46 denotes a movable member made of a conductive rubber chip or the like at a position facing the first to third fixed contacts 41 to 43. It is a rubber sheet having the contact points 44 attached thereto.

In addition, the same reference numerals as those in FIG. 1 indicate the same or corresponding portions. The structure of the standard keys K1 to K32 is the same as that of the conventional device (see FIGS. 7 and 9).

In such a keyboard device of the present invention, the pressed keys K1 to K64 are specified by the pressed key specifying means of the keyboard processor KBP as follows.

That is, the standard keys K1 to K32 are specified by
On the condition that the scan signal having the same phase as the scan signal output from the scan signal output ports D0 to D7 is not input to the extended key matrix determination port E, the scan signal of that phase is input to the scan signal input ports G0 to G3.
It is performed by determining which of the two is input.

The specification of the expansion keys K33 to K64 is conditional on the fact that the scan signals in phase with the scan signals output from the scan signal output ports D0 to D7 are also input to the expansion key matrix determination port E at the same time. The scan signal of that phase is connected to the scan signal input ports G0 to G3.
It is performed by determining which of the two is input.

For example, now, the scan signal output port D2
The scan signal is input to the scan signal input port G1 at the timing when the scan signal is output from the
When no scan signal is input to the extended key matrix determination port E, it is determined that the standard key K10 is pressed.

Further, the scan signal is input to the scan signal input port G1 at the timing when the scan signal is output from the scan signal output port D2, and at the same time, the same scan signal is also input from the extended key matrix determination port E. In this case, it is determined that the expansion key K42 has been pressed.

Here, as described above, in the conventional device, the diodes DL, are provided on the left and right sides of the extended key matrix KE.
Since the DR (see FIG. 6) was connected, the problems of high cost and increased space occurred. In this case, if the diodes DL and DR are simply removed, the scan signal wraps around, which causes an erroneous key identification.

In the present invention, the introduction of the scan signal from the expansion keys K33 to K64 to the expansion key matrix judgment port E is performed by the number of expansion keys for connecting the expansion keys K33 to K64 and the expansion key matrix judgment port E individually. The same number of extended scan signal input lines L1 to L32 are used. That is, since the extended scan signal input lines L1 to L32 are dedicated lines for the specific extended keys K33 to K64, the sneak of the scan signal does not occur. Therefore, the diode D in the conventional device can be used without trouble such as erroneous key identification.
It becomes possible to remove all L and DR.

Further, as described above and as can be seen from FIGS. 2 to 4, one end of each of the extended scan signal input lines L1 to L32 is connected to the scan signal output line EO0 by pushing the extended keys K33 to K64. To EO7 and scan signal input lines EI0 to EI3 are electrically connected to each other, a specific expansion key K33 associated in advance so as to be electrically connected to these lines.
~ Extended to K64.

From the above description, the operation when the standard key K10 and the expansion key K42 are pressed will be specifically described as follows.

First, when the standard key K10 is pressed,
At the timing when the scan signal is output from the scan signal output port D2, the scan signal is sequentially input to the scan signal input port G1 through the key K10 → dot C, and it is determined that the standard key K10 is pressed. At this time, even if the scan signal tries to wrap around in the direction of the expansion key K62 or K41, the expansion keys K33 to K64 are configured as shown in FIG. It will not be done.

Next, when the expansion key K42 is pressed,
At the timing when the scan signal is output from the scan signal output port D2, the scan signal is sequentially input to the scan signal input port G1 through the key K42 and the dot C, while the extended key matrix judgment port E is extended to the key K42 dedicated extended scan. The same scan signal is input at the same time through the signal input line L10, and it is determined that the expansion key K42 is pressed. At this time, the scan signal is the expansion key K38,
Even if an attempt is made to sneak into the other scan signal input ports G0, G2, G3 via K41, K43, K46, the expansion key K33
Since each of .about.64 is configured as shown in FIG. 2, it does not flow anywhere other than the extended key K42 portion and is not erroneously determined.

In FIG. 1, the key identification result output port O
Although the signal from the UT is converted to infrared light by the infrared light emitting circuit 11 and output to the outside, that is, the keyboard device to which the infrared remote control is applied has been exemplified.
The signal from the key identification result output port OUT may be output to the outside in a wired manner, and even when it is output wirelessly, the medium is not limited to infrared rays only.

Although the standard and extended key matrix configurations are 8 × 4 (= 32), the present invention is not limited to this. In particular, the number of standard keys and the number of extended keys do not necessarily have to be equal, and the extended key matrix determination port E
Is provided, and the number of extended keys is arbitrary as long as it can determine either the standard key or the extended key.

Further, in the example of FIGS. 4 and 5, the expansion keys K33 to K6 which are electrically connected to one ends of the expansion scan signal input lines L1 to L32.
The third fixed contact 43 of 4 is connected to the scan signal output lines EO0 to E
First fixed contact 41 on O7 side and scan signal input line EI0-
Although it is arranged on the line connecting the second fixed contact 42 on the EI3 side, particularly at the center of the line, the invention is not limited to this, and the first to third fixed contacts 41 to 41 when the movable contact 44 is pressed. Any structure may be used as long as 43 is electrically connected to each other at the same time.

However, as shown in the examples of FIGS. 4 and 5, on the line connecting the first fixed contact 41 and the second fixed contact 42 and between the first fixed contact 41 and the second fixed contact 42. If the third fixed contact is arranged in the first fixed contact 41 and the second fixed contact,
When the fixed contact 42 and the movable contact 44 are electrically connected, the third fixed contact 43 is inevitably electrically connected to the first fixed contact 41 and the second fixed contact 42 due to the structure.

Therefore, only the first fixed contact 41 and the second fixed contact 42 are electrically connected, the third fixed contact 43 is not electrically connected to them, and the expansion keys K33 to K64 are pressed to the standard keys K1 to K32. There is an advantage that the extended keys K33 to K64 can be operated reliably without being erroneously recognized.

[0055]

As described above, according to the first aspect of the present invention, one end of the extended scan signal input line for discriminating which one of the extended key and the standard key is pushed is scanned by pushing the extended key. When the signal output line and the scan signal input line are electrically connected to each other, they are individually extended to a plurality of extension keys so as to be electrically connected to the two lines. Neither the output line nor the scan signal input line is conductive.

Therefore, even if the diode in the conventional device is removed, it is possible to prevent the unintended sneak of the scan signal, and it is possible to achieve cost reduction and space saving by removing the diode.

According to the invention of claim 2, claim 1
In the expansion key according to the present invention, a third fixed contact conducting to one end of the expanded scan signal input line is on a line connecting the first fixed contact on the scan signal output line side and the second fixed contact on the scan signal input line side. Since the first fixed contact and the second fixed contact are electrically connected to each other by the movable contact, the third fixed contact is inevitably structurally connected to the first fixed contact and the second fixed contact. Will be conducted simultaneously.

Therefore, only the first fixed contact and the second fixed contact are electrically connected, and the third fixed contact is not electrically connected to them,
The pressing of the expansion key is not mistakenly recognized as the pressing of the standard key, and the operation of the expansion key can be ensured.

[0059]

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of a keyboard device according to the present invention used in a remote control transmitter.

FIG. 2 is a circuit diagram showing details of each expansion key in FIG.

3 is a circuit diagram showing details of an extended key matrix portion in FIG.

FIG. 4 is a configuration diagram showing details of each extended key in FIG.
(A) is a partially omitted plan view, (b) is bb in (a).
It is a line sectional arrow view.

5 is a plan view showing another fixed contact pattern example of each expansion key portion in FIG. 1. FIG.

FIG. 6 is a circuit diagram of a conventional keyboard device.

7 is a circuit diagram showing details of each standard key portion in FIG.

8 is a circuit diagram showing details of each expansion key in FIG.

9A and 9B are configuration diagrams showing details of each standard key and each extended key portion in FIG. 6, in which FIG. 9A is a partially omitted plan view, and FIG. 9B is a sectional arrow along line bb in FIG. It is a perspective view.

[Explanation of symbols]

 KS standard key matrix SO0 to SO7 scan signal output line 1SO first scan signal output line group SI0 to SI3 scan signal input line 1SI first scan signal input line group K1 to K32 standard key KE expansion key matrix EO0 to EO7 scan signal output line 1EO Second scan signal output line group EI0 to EI3 Scan signal input line 1EI Second scan signal input line group K33 to K64 Extended key L1 to L32 Extended scan signal input line KBP Keyboard processor D0 to D7 Scan signal output port G0 to G3 Scan signal input port E Extended key matrix judgment port OUT Key identification result output port 41 First fixed contact 42 Second fixed contact 43 Third fixed contact 44 Movable contact 45 Printed wiring board 46 Rubber sheet

Claims (2)

[Claims] 1. A first scan signal output line group including a plurality of scan signal output lines, and a first scan signal input line intersecting each line of the first scan signal output line group in a matrix. A plurality of scan signal input line groups and a plurality of standards provided at each intersection of the scan signal output line and the scan signal input line and electrically connecting the scan signal output line and the scan signal input line at the intersection by pressing each A standard key matrix including a key, a second scan signal output line group including a plurality of scan signal output lines serially connected to each line of the first scan signal output line group, and the second scan A plurality of scan signal input lines that intersect each line of the signal output line group in a matrix form and are separately connected in parallel to each line of the first scan signal input line group. And a second scan signal input line group formed of the second scan signal output line group and the scan signal output line of the second scan signal output line group and the scan signal input line of the second scan signal input line group are crossed by pressing each other. An expansion key matrix including a plurality of expansion keys for electrically connecting the scan signal output line and the scan signal input line at the intersection, and to each line of the first scan signal output line group or the second scan signal output line group. Scan signal output means for sequentially providing scan signals with different phases, and which scan signal input line the given scan signal is detected in the same phase, and the scan signal of that phase is simultaneously sent to the extended key matrix determination port. A keyboard professional provided with pressing key specifying means for specifying a standard key or an expanded key pressed depending on whether it is input. In the keyboard device including a touch panel, a scan signal is introduced from the expansion key to the expansion key matrix determination port by connecting the scan signal output line and the scan signal input line at one end by pressing the expansion key. When extended, they are individually extended to the plurality of extension keys so as to be electrically connected to these two lines, and the other end is made of a plurality of extension scan signal input lines collectively connected to the extension key matrix determination port. Keyboard device. 2. Each expansion key has a movable contact, a first fixed contact on the scan signal output line side, a second fixed contact on the scan signal input line side, and an extended scan signal input, which are electrically connected to each other when the movable contact is pressed. A third fixed contact that conducts to one end of the wire, the third fixed contact being at least on a line connecting the first fixed contact and the second fixed contact, and the first fixed contact and the second fixed contact. The keyboard device according to claim 1, wherein the keyboard device is arranged between the contacts.