CN115206272A

CN115206272A - Electronic keyboard musical instrument

Info

Publication number: CN115206272A
Application number: CN202210163472.3A
Authority: CN
Inventors: 蒋恩良
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-10-18
Also published as: CN116168669A; WO2023160545A1

Abstract

The invention provides an electronic keyboard instrument, which relates to the technical field of electronics and comprises keys, carbon film contacts below the keys and a sound source chip on a main board in a pronunciation source individual; the left hand and the right hand or each finger of the playing keyboard instrument respectively correspond to one or a group of relatively independent electronic keyboard instrument pronunciation source individuals, all pronunciation source individuals share one group of conductor keyboard, a switch circuit is arranged between the conductor keyboard and a carbon film contact which is relatively independent under the conductor keyboard and a sound source chip corresponding to the left hand, the right hand or each finger, a control wire is led out from each switch circuit and connected with a wire output end on a conductor glove, and the finger wire on the conductor glove can realize the control of the switch circuit corresponding to the finger wire through the conductor keyboard, thereby further realizing the control of a pin corresponding to the sound source chip in the related pronunciation source individual. Two or more than two sound source individuals are selected to be combined with different switch circuits, so that two-channel stereo or multi-channel stereo can be realized.

Description

Electronic keyboard musical instrument

Technical Field

The invention relates to the technical field of electronics, in particular to an electronic keyboard instrument.

Background

In the double-strength sensing key structure, the carbon film contact below each key is generally divided into three parts, two mutually connected contacts are called C-area carbon film contacts, and the other two contacts are called A-area carbon film contacts and B-area carbon film contacts.

Modern electronic organs generally use PCM sampled sound sources. The sampling is to record the sound of the musical instrument, digitize it and store it in ROM or FLASH, and then, when a key is pressed, the CPU or DSP chip plays back the sound. We refer to the chip that can store and playback the sampled audio source as the audio source chip. The sound source chip comprises a pin in an A area, a pin in a C area and a pin in a B area which correspond to the carbon film contacts, different electronic keyboard musical instruments are different in sound source chip, the connection relation of the pins is different, and the sound source chip belongs to the prior art and is not detailed herein.

The carbon film contacts of the A area, the C area and the B area under each key and the carbon film contacts of the same area under other keys are not independent on the printed circuit board, but are connected with the pins corresponding to the sound source chip on the main board through the row-shaped conducting wires after matrix synthesis. The key is pressed, under the action of the conductive rubber, the carbon film contacts in the area A and the area C are sequentially conducted with the carbon film contacts in the area B and the area C, and then a circuit in a sound source chip of the electronic organ or the electronic piano is triggered to generate sound, so that the function of the force key is realized, and the function of the switch is also realized.

When two hands play on a keyboard of a traditional electronic organ or an electronic piano, no matter a plurality of keys are simultaneously flicked, the sounds are mixed together, the sense of orientation and the sense of hierarchy cannot be reflected, in addition, by applying a dual tone and a multi-tone mode, the pronunciation source of each tone is not independent.

Disclosure of Invention

On the key surface of an electronic organ or an electronic piano, the contents played by two hands are expected to be independent from each other in terms of pronunciation sources, and the pronunciation sources corresponding to the left hand and the right hand can sound at the same time when the left hand and the right hand touch keys simultaneously; it is also expected that different individual sound sources of the electronic keyboard musical instrument corresponding to different touch keys of the finger can be controlled by different touch keys, and a plurality of relatively independent individual sound sources can work simultaneously when a plurality of keys are flicked.

In order to solve the above technical disadvantages of the conventional electronic keyboard musical instrument, the present invention provides an electronic keyboard musical instrument having a stereo function:

an electronic keyboard musical instrument comprises keys, carbon film contacts below the keys and a sound source chip on a mainboard of a traditional electronic keyboard musical instrument;

the left hand, the right hand or each finger of the playing keyboard instrument respectively corresponds to one or a group of relatively independent individuals with the functions of the traditional electronic keyboard instrument;

two or more individuals with the functions of the traditional electronic keyboard instrument share one layer of keys and carbon film contacts below the keys;

the keys are conductor keys;

the carbon film contacts are relatively independent;

switch circuits are arranged between the conductor keys and the carbon film contacts which are relatively independent under the conductor keys and the sound source chips corresponding to the left hand, the right hand or each finger respectively;

when playing the stereo electronic keyboard instrument, conductor gloves with finger leads are applied;

the switch circuit is connected with the output end of the lead on the conductor glove through a control wire;

the finger wire on the conductor glove controls the corresponding switch circuit through the conductor keyboard, and further controls the corresponding pin of the sound source chip related to the switch circuit. Adopt the produced beneficial effect of above-mentioned technical scheme: two or more than two independent electronic keyboard musical instrument individuals are applied, a left hand, a right hand or each finger respectively corresponds to one electronic keyboard musical instrument individual, a conductor keyboard, a conductor glove and a switch circuit arranged between a carbon film contact and a sound source chip which are arranged below the keyboard and are relatively independent are applied, on one layer of keyboard, two hands or a plurality of fingers with finger leads simultaneously bounce down keys, the switch circuits connected with different sound source chips are started, pins corresponding to the related sound source chips are further conducted, and stereo sounds with different sound sources are played.

The technical scheme is equivalent to that the left hand, the right hand or each finger respectively corresponds to one switch circuit, when the left hand, the right hand or each finger simultaneously plays down different keys, a current loop is not allowed to be formed between the related switch circuits, otherwise, the stereo function of the electronic keyboard instrument cannot be realized. Through the following different switch circuit structures, the current loops cannot be formed between two or more switch circuits when the two or more switch circuits work simultaneously.

In a switch circuit forming a stereo electronic keyboard instrument, a direct current power supply and an optical coupler group are combined, a circuit which does not need a conductor keyboard or a conductor glove is called an A-type circuit, and the combination of the two A-type circuits is called an AA combined circuit;

in the switch circuit composing the stereo electronic keyboard instrument, the DC power supply is combined with the optical coupler group, the circuit needing to apply the conductor keyboard and the conductor glove is called as B type circuit, and the combination of the two B type circuits is called as BB combined circuit. A BB combined circuit which cannot realize the tone color superposition stereo function is called an old BB combined circuit, and a BB combined circuit which can realize the tone color superposition stereo function is called a new BB combined circuit;

in the switch circuit composing the stereo electronic keyboard instrument, a single chip circuit is combined with an optical coupler group, a circuit which needs to apply a conductor keyboard and a conductor glove is called a C-type circuit, and the combination of two or more C-type circuits is called a CC combined circuit. We refer to CC combinational circuits that cannot implement the tone color superposition stereo function as old CC combinational circuits. We call the CC combination circuit which can realize the function of tone superposition stereo as a new CC combination circuit;

in the switch circuits constituting the stereo electronic keyboard instrument, one a-type circuit and one B-type circuit are combined, and what is called an AB combination circuit in which the a-type circuit is controlled by the B-type circuit or the B-type circuit is controlled by the a-type circuit. The AB combination circuit which cannot realize the tone color superposition stereo function is called as an old AB combination circuit. We call the AB combiner circuit that can realize the tone color superposition stereo function as a new AB combiner circuit.

The technical scheme of the novel AB combined switch circuit is as follows:

the switch circuit includes left sound track switch circuit and right sound track switch circuit, left side sound track switch circuit with right sound track switch circuit all includes independent DC power supply and organizes with the opto-coupler of key quantity unanimity, wherein, every among the right sound track switch circuit the opto-coupler group is controlled and is controlled with first opto-coupler normally closed solid state relay and second opto-coupler normally closed solid state relay, first opto-coupler normally closed solid state relay with second opto-coupler normally closed solid state relay is controlled by left sound track switch circuit again. When the left sound channel switch circuit works, the optical coupler group in the left sound channel switch circuit can be started, and the optical coupler group in the right sound channel switch circuit corresponding to the same key is closed. In the left sound channel switch circuit, the optocoupler set is arranged between a positive lead of the direct current power supply and a relatively independent A-area carbon film contact and a B-area carbon film contact below the conductor keyboard, and a negative lead of the direct current power supply is connected with a lead output end on the left sound channel conductor glove; and the C-area carbon film contact is connected with the corresponding conductor keyboard.

In the right sound channel switch circuit, after an anode lead of the direct current power supply passes through an anode and a cathode of an output end of the second optocoupler normally-closed solid-state relay, the optocoupler group is arranged between the area A carbon film contact and the area B carbon film contact which are relatively independent under the conductor key; and the C-area carbon film contact is connected with a negative lead of the direct-current power supply after passing through the positive and negative electrodes of the output end of the first optocoupler normally-closed solid-state relay.

In the right sound channel switch circuit, the input ends of the first optical coupler normally closed solid-state relay and the second optical coupler normally closed solid-state relay are connected with the positive electrode of the direct-current power supply in the left sound channel switch circuit through leads, and the input ends of the first optical coupler normally closed solid-state relay and the second optical coupler normally closed solid-state relay are connected with the corresponding conductor keyboard through a C-area carbon film contact.

In the left and right channel switch circuits, each optical coupler group in each switch circuit comprises a first optical coupler corresponding to the carbon film contacts in the area A and the area C below the keyboard and a second optical coupler corresponding to the carbon film contacts in the area B and the area C below the keyboard.

The carbon film contact points of the area A below the keyboard are respectively connected with the negative electrode of the input end of a first optical coupler in the corresponding optical coupler group in each switch circuit, and the carbon film contact points of the area B below the keyboard are respectively connected with the negative electrode of the input end of a second optical coupler in the corresponding optical coupler group in each switch circuit.

In each switch circuit, the positive pin and the negative pin of the output end of each optocoupler in the optocoupler group are respectively subjected to matrix synthesis with the same output end pin of the optocoupler at the same position in other optocoupler groups of the same circuit through a matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins of the related sound source chips.

The new AB combined switch circuit working principle:

in the left sound channel switch circuit, an optical coupler group is arranged between a direct current power supply and a carbon film contact below a conductor keyboard, a left hand with a finger lead springs down a key, and an optical coupler in the optical coupler group can form a current loop to be started. And when the left hand touches the key, the optocoupler in the optocoupler group corresponding to the right sound channel is closed through an optocoupler normally closed solid-state relay arranged in the right sound channel circuit.

In the right sound channel switch circuit, the left hand does not touch the key, and the optical coupler in the optical coupler group is in a conducting state. The positive lead of the direct-current power supply is connected with the positive pole of the input end of the optocoupler group through the output end of the optocoupler normally closed solid-state relay, the negative pole of the input end of the optocoupler in the optocoupler group is connected with the A-area contact and the B-area contact in the carbon film contact in a one-to-one manner, the right hand finger touches the key, the A-area carbon film contact, the C-area carbon film contact and the B-area carbon film contact are contacted, the C-area carbon film contact is connected with the negative lead of the direct-current power supply through the output end of the first optocoupler normally closed solid-state relay, and a current loop can be formed.

Different keys are bounced down simultaneously to both hands finger, and two switch circuit simultaneous workings can start the opto-coupler in the opto-coupler group that corresponds in two circuits simultaneously, and the pin that the relevant sound source chip that every opto-coupler output both ends are connected through the wire corresponds will be switched on, can play two sound channels stereophonic.

Because right channel switch circuit can be closed to the left channel switch circuit during operation under same key, can not influence left channel switch circuit when the right hand that does not have the finger wire touches the key, so different keys are played down simultaneously to both hands finger, can not let to form current return circuit under same key between the corresponding left and right channel opto-coupler group through the finger wire.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram showing the circuit connections of the new AB composite structure of the electronic keyboard instrument according to the embodiment of the present invention;

FIG. 2 is a schematic diagram showing the circuit connections associated with the old AB assembly structure of the electronic keyboard instrument according to the embodiment of the present invention;

fig. 3 is a block diagram schematically illustrating a new CC assembly structure of the electronic keyboard instrument according to the embodiment of the present invention;

fig. 4 is a block diagram schematically illustrating an old CC assembly structure of an electronic keyboard instrument according to an embodiment of the present invention;

FIG. 5 is a schematic circuit diagram showing the connection of the new BB assembly structure of the electronic keyboard instrument according to the embodiment of the present invention;

FIG. 6 is a schematic circuit diagram showing the connection of the old BB assembling structure of the electronic keyboard musical instrument according to the embodiment of the present invention;

FIG. 7 is a schematic view of the AA combination section fixing structure of the electronic keyboard instrument according to the embodiment of the present invention;

FIG. 8 is a schematic view of an AA combined partition adjustable structure of the electronic keyboard instrument according to the embodiment of the present invention;

FIG. 9 is a schematic view showing a tone color superimposed stereo doublet of an electronic keyboard musical instrument according to an embodiment of the present invention;

fig. 10 is a schematic connection diagram of different pins of the sound source chip and the optical coupler in the optical coupler group in the old AB combined switch circuit, the old CC combined switch circuit, and the old BB combined switch circuit provided in the embodiment of the present invention;

fig. 11 is a schematic connection diagram of different pins of an optical coupler in an optical coupler group and an audio source chip in the new AB combination switch circuit, the new CC combination switch circuit, the new BB combination switch circuit, and the AA combination switch circuit provided in the embodiment of the present invention;

fig. 12 is a schematic diagram showing the connection between the carbon film contacts under the keys of the conventional electronic keyboard instrument and the corresponding pins of the sound source chip according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Embodiment mode 1: novel AB combined circuit

Fig. 1 is a schematic diagram of the circuit connection of the new AB assembly structure of the electronic keyboard instrument. In the figure AB101 is a conductor keypad. AB102 is a-block carbon film contact. AB103 is a C-block carbon film contact. AB104 is a B-block carbon film contact. AB105 is a left channel conductor glove. AB106 is the wire output on the conductor glove. AB107 is the left channel dc supply. AB108 is the left channel first optocoupler. AB109 is the left channel second optocoupler. AB110 is the left channel source chip. AB111 is the pin of the A area of the left channel sound source chip. And AB112 is a pin of the C area of the left channel sound source chip. AB113 is a left channel source chip B-area pin. AB114 is the right channel dc supply. AB115 is the first optocoupler normally closed solid state relay. AB116 is the right channel first optocoupler. AB117 is the right channel second optocoupler. AB118 is a second optocoupler normally closed solid state relay. AB119 is the right channel source chip. And AB120 is a pin of the A area of the right channel sound source chip. And AB121 is a pin of the C area of the right channel sound source chip. AB122 is the pin of the right channel audio source chip B-block.

In an embodiment of the new AB combiner:

(1) Two relatively independent individuals with the functions of the traditional electronic keyboard instrument are applied, which respectively correspond to the left hand and the right hand for playing the keyboard instrument, and the two relatively independent individuals with the functions of the traditional electronic keyboard instrument share a layer of conductor keys AB101 and carbon film contacts below the keys.

(2) The carbon film contacts under the keys include relatively independent a-region carbon film contacts AB102, relatively independent C-region carbon film contacts AB103, and relatively independent B-region carbon film contacts AB104.

(3) A switch circuit corresponding to the left sound channel is arranged between the carbon film contact and the sound source chip AB110 in the left-channel traditional electronic keyboard instrument individual, and a switch circuit corresponding to the right sound channel is arranged between the carbon film contact and the sound source chip AB119 in the right-channel traditional electronic keyboard instrument individual. Each switch circuit comprises an independent direct current power supply and optocoupler groups with the same number as the keys.

(4) The left channel switch circuit is by left channel DC power supply AB107 and first opto-coupler AB108, second opto-coupler AB109 is constituteed, the anodal input of two opto-couplers is direct to be connected with DC power supply AB 107's anodal wire, the input negative pole of first opto-coupler AB108 is connected with the A district carbon film contact AB102 below the key that corresponds, the input negative pole of second opto-coupler AB109 is connected with the B district carbon film contact AB104 below the key that corresponds, C district carbon film contact AB103 is connected with the conductor keyboard AB101 that corresponds.

(5) The left channel switch circuit is connected with a conductor keyboard AB101 and a conductor glove AB105 with finger leads, and the negative lead of a left channel direct current power supply AB107 is connected with a lead output end on the left conductor glove AB105 to be connected with an AB106.

(6) The right sound channel switch circuit comprises a right sound channel direct current power supply AB114 and a first optical coupler AB116, a second optical coupler AB117, a first optical coupler normally-closed solid-state relay AB115 and a second optical coupler normally-closed solid-state relay AB118 for controlling the two optical couplers, wherein an anode lead of the right sound channel direct current power supply AB114 is connected with anode input ends of the first optical coupler AB116 and the second optical coupler AB117 through an output end of the second optical coupler normally-closed solid-state relay AB118, an input end cathode of the first optical coupler AB116 is connected with an area A carbon film contact AB102 below a key, an input end cathode of the second optical coupler AB117 is connected with an area B carbon film contact AB104 below the key, and an area C carbon film contact AB103 is connected with an anode lead of the right sound channel direct current power supply AB114 after passing through an output end anode and a cathode of the first optical coupler normally-closed solid-state relay AB 115.

(7) The first optocoupler normally-closed solid-state relay AB115 and the second optocoupler normally-closed solid-state relay AB118 are controlled by a left sound channel switching circuit, the anode of the input end of the first optocoupler normally-closed solid-state relay AB115 is connected with the anode lead of a left sound channel direct-current power supply AB107, and the cathode of the input end of the first optocoupler normally-closed solid-state relay AB is connected with a corresponding C-zone carbon film contact AB103 below the keyboard.

(8) In the left sound channel optical coupler group, a positive pin at the output end of a first optical coupler AB108 and a positive pin at the output end of the first optical coupler AB108 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with corresponding pins in a pin AB111 in an area A of a left sound channel sound source chip; and a negative pin at the output end of the first optical coupler AB108 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument and then are connected with a corresponding pin in a pin AB112 in a C area of a left sound channel sound source chip.

(9) In the right channel optical coupler group, a positive electrode pin of an output end of a first optical coupler AB116 and a positive electrode pin of an output end of the first optical coupler AB116 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in an A area pin AB120 in a right channel sound source chip AB 119; and a negative pin at the output end of the first optical coupler AB116 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument, and then are connected with corresponding pins in a pin AB121 in a C area in a right sound channel sound source chip AB 119.

(10) In the left channel optical coupler group, the positive pin of the output end of the second optical coupler AB109 and the positive pin of the output end of the second optical coupler AB109 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins in the B area pin AB113 in the left channel sound source chip AB 110; and a negative pin of an output end of the second optical coupler AB109 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with a corresponding pin in a C-area pin AB112 in a left sound channel sound source chip AB 110.

(11) In the right channel optical coupler group, the positive pin of the output end of the second optical coupler AB117 and the positive pin of the output end of the second optical coupler AB117 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins in the B area pin AB122 in the right channel sound source chip AB 119; and a negative pin at the output end of the second optical coupler AB117 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument, and then are connected with corresponding pins in a pin AB121 in a C area in a right sound channel sound source chip AB 119.

Embodiment mode 2: technical scheme of old AB combined switch circuit

The switch circuit includes left sound track switch circuit and right sound track switch circuit, left side sound track switch circuit with right sound track switch circuit all includes independent DC power supply and organizes with the opto-coupler of key quantity unanimity, wherein every among the right sound track switch circuit the opto-coupler group is controlled and first opto-coupler normally closed solid state relay and second opto-coupler normally closed solid state relay, first opto-coupler normally closed solid state relay with second opto-coupler normally closed solid state relay is controlled by left sound track switch circuit again. When the left sound channel switch circuit works, the optical coupler group related to the left sound channel can be started, and meanwhile, the corresponding right sound channel optical coupler group under the same key can be actively closed. In the left sound channel switch circuit, the optocoupler set is arranged between a positive lead of the direct current power supply and the conductor keyboard, and a negative lead of the direct current power supply is connected with a lead output end on the left sound channel conductor glove;

in the right sound channel switching circuit, a positive wire of the direct-current power supply is connected with a positive electrode of an input end of each optocoupler in the optocoupler group after passing through a positive electrode and a negative electrode of an output end of the second optocoupler normally-closed solid-state relay corresponding to each key, and the negative electrode of the input end of each optocoupler in the optocoupler group is connected with a negative wire of the direct-current power supply after passing through a positive electrode and a negative electrode pin of an output end of the first optocoupler normally-closed solid-state relay.

In the right sound channel switch circuit, the input ends of the first optical coupler normally closed solid-state relay and the second optical coupler normally closed solid-state relay are connected with the positive electrode wire of the direct-current power supply in the left sound channel switch circuit, and the input ends of the first optical coupler normally closed solid-state relay and the second optical coupler normally closed solid-state relay are directly connected with the corresponding conductor keyboard.

In the two-channel switch circuit, one pin of each optical coupler output end in the optical coupler group is connected with a corresponding carbon film contact end lead, and the other pin is subjected to matrix synthesis with the same pin of the optical coupler at the same position in other optical coupler groups of the same circuit through the matrix key rule of the traditional electronic keyboard instrument and then is connected with the corresponding pin of the related sound source chip.

The working principle of the old AB combined circuit is as follows:

in the left sound channel switch circuit, an optical coupler group is arranged between a direct current power supply and a carbon film contact below a conductor keyboard, a left hand with a finger lead springs down a key, and an optical coupler in the optical coupler group can form a current loop to be started.

When the left hand touches the key, the optocoupler normally closed solid-state relay arranged in the right channel switch circuit can close the optocoupler in the corresponding optocoupler group in the right channel switch circuit. Under the condition that the left hand does not touch the key, in the right channel switch circuit, the optocoupler in the optocoupler group corresponding to the key is in a conducting state, the right hand finger without a finger wire touches the key, and the carbon film contact is conducted through a connecting line between the output end of the optocoupler in the optocoupler group and the corresponding pin of the sound source chip.

Different keys are simultaneously bounced down by both hands, the optocouplers in the optocoupler groups corresponding to the two circuits can be started simultaneously, the connecting line between the carbon film contact of the area A, the area C and the area B below the bounced down keys and the corresponding pins of the related sound source chip is further conducted through the output ends of the optocouplers, and stereo sound with different sound sources is played.

Fig. 2 is a schematic diagram of the circuit connection related to the old AB combination structure of the electronic keyboard instrument.

AB201 in the figure is a conductor keypad. AB202 is an a-block carbon film contact. AB203 is a C-block carbon film contact. AB204 is a B-block carbon film contact. AB205 is a left channel conductor glove. AB206 is the wire output on the conductor glove. AB207 is the left channel dc supply. AB208 is the left channel first optocoupler. AB209 is the left channel second optocoupler. AB210 is the left channel third optocoupler. AB211 is a left channel source chip. AB212 is the left channel audio source chip a-block pin. AB213 is a pin of the left channel source chip C-block. AB214 is the pin of the B-area of the left channel audio source chip. AB215 is the right channel dc supply. AB216 is a first optocoupler normally closed solid-state relay. AB217 is a right channel first optical coupler AB218 is a right channel second optical coupler. AB219 is the right channel third optocoupler. AB220 is a second optocoupler normally closed solid state relay. AB221 is a right channel source chip. AB222 is a pin of the right channel audio chip a-block. And AB223 is a pin of the C area of the right channel sound source chip. AB224 is a pin of the B-area of the right channel audio source chip.

In an embodiment of the old AB combination switch circuit:

(1) Two relatively independent individuals with the functions of the traditional electronic keyboard instrument are applied, which respectively correspond to the left hand and the right hand of the playing keyboard instrument, and the two individuals with the functions of the traditional electronic keyboard instrument share a layer of conductor keys AB201 and carbon film contacts below the keys.

(2) The carbon film contacts below the keys are divided into relatively independent a-region carbon film contacts AB202, relatively independent C-region carbon film contacts AB203, and relatively independent B-region carbon film contacts AB204.

(3) Two switch circuits corresponding to the left and right sound channels are arranged between the carbon film contact and the sound source chips in the two traditional electronic keyboard instruments, each switch circuit comprises a direct-current power supply and an optical coupler group with the same number as keys, and each optical coupler group comprises three optical couplers.

(4) The positive poles of the input ends of a first optical coupler AB208, a second optical coupler AB209 and a third optical coupler AB210 in each optical coupler group of the left sound channel switch circuit are directly connected with the positive pole wire of a left sound channel direct current power supply AB207, and the negative poles of the input ends of the three optical couplers are connected with a conductor keyboard AB 201.

(5) The left channel switch circuit is connected with a conductor keyboard AB201 and a conductor glove AB205 with a finger lead AB206, and the negative lead of a left channel direct current power supply AB207 is connected with a lead output AB206 on the left-hand conductor glove AB 205.

(6) The right sound channel switch circuit comprises a direct current power supply AB215 and optical coupler groups consistent with the number of keys, each optical coupler group comprises a first optical coupler AB217, a second optical coupler AB218 and a third optical coupler AB219, and further comprises a first optical coupler normally closed solid-state relay AB216 and a second optical coupler normally closed solid-state relay AB220, wherein a positive lead of the direct current power supply AB215 is connected with the positive poles of the output ends of all the second optical coupler normally closed solid-state relays AB220, the negative poles of the output ends of the second optical coupler normally closed solid-state relays AB220 are connected to the positive poles of the first optical couplers AB217 in the corresponding optical coupler groups, the positive poles of the input ends of the second optical coupler AB218 and the input ends of the third optical coupler AB219, the negative poles of the input ends of the three optical couplers are connected with the positive poles of the output ends of the corresponding first optical coupler normally closed solid-state relays AB216, and then the negative poles of the output ends of the optical coupler normally closed solid-state relays 216 are further connected with the negative pole leads of the left sound channel direct current power supply AB 207. The optocoupler normally-closed solid-state relay can select AQY412EH, and other elements with functions close to and available can also be selected. The two normally-closed optocoupler solid-state relays are controlled by a left sound channel switch circuit, the positive electrodes of the input ends of the two normally-closed optocoupler solid-state relays are connected with a positive electrode lead of a left sound channel direct-current power supply AB207, and the negative electrodes of the input ends of the two normally-closed optocoupler solid-state relays are connected with a conductor keyboard AB 201.

(7) In the left and right sound channel switch circuits, each optical coupler group in each switch circuit comprises a first optical coupler, a second optical coupler and a third optical coupler, the negative electrode of the output end of the first optical coupler is connected with an A-area carbon film contact AB202 below the corresponding key, the positive electrode of the output end of the second optical coupler is connected with a C-area carbon film contact AB203 below the corresponding key, and the negative electrode of the output end of the third optical coupler is connected with a B-area carbon film contact AB204 below the corresponding key.

(8) In each optocoupler group in the left channel switch circuit, the anode of the output end of the first optocoupler AB208 and the anode of the output end of the first optocoupler AB208 in other optocoupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with corresponding pins in an A-area pin AB212 in a left channel sound source chip AB 211; the negative pin of the output end of the second optical coupler AB209 and the negative pin of the output end of the second optical coupler AB209 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pin in the C-area pin AB213 in the left sound channel sound source chip AB 211; the positive pole of the output end of the third optical coupler AB210 and the positive pole pin of the output end of the third optical coupler AB210 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins in the B area pin AB214 in the left sound channel sound source chip AB 211.

(9) In each optocoupler group in the right channel switch circuit, the positive electrode of the output end of the first optocoupler AB217 and the positive electrodes of the output ends of the first optocoupler AB217 in other optocoupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument, and then are connected with corresponding pins in a pin AB222 in an area A in a right channel sound source chip AB 221; the output end negative pin of the second optical coupler AB218 and the output end negative pin of the second optical coupler AB218 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with corresponding pins in a C area pin AB223 in a right sound channel sound source chip AB 221; the positive pole of the output end of the third optical coupler AB219 and the positive pole pin of the output end of the third optical coupler AB219 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins in the B area pin AB224 in the right sound channel sound source chip AB 221.

Embodiment mode 3: technical scheme of novel CC combined single chip microcomputer circuit

In the two-channel or multi-channel switch circuit, each switch circuit comprises a single chip microcomputer circuit and optocoupler groups with the same number as keys;

between two or more than two single chip microcomputer circuits, input end pin leads at the same position are combined together and connected with corresponding conductor keys;

in each single chip microcomputer circuit, the optical coupler group is arranged between the relatively independent output end and a VCC conducting wire.

Each single chip microcomputer circuit is respectively led out a high-low level control line to be connected with the output end of a lead on the corresponding conductor glove;

in each single chip circuit, each optical coupler group is controlled by a driving optical coupler; the positive electrode of the input end and the positive electrode of the output end of the driving optocoupler are both connected with the VCC conducting wire, the negative electrode of the input end of the driving optocoupler is connected with the output end of the corresponding single chip microcomputer circuit, and the optocoupler group is arranged between the negative electrode of the output end of the driving optocoupler and the carbon film contacts of the area A and the area B below the corresponding conductor key;

and in order to prevent a 5V signal of a VCC (voltage converter) wire in the singlechip circuit from forming a circuit loop with the output ends of other singlechip circuits through the C-area carbon film contact end wires after the 5V signal passes through the positive electrode and the negative electrode of the input end of the driving optocoupler, a directional diode is arranged between the C-area carbon film contact and the output end corresponding to each singlechip circuit.

In the left and right sound channel or multichannel switching circuit, every opto-coupler group in every switching circuit all includes the first opto-coupler that corresponds with A district's carbon film contact below the keyboard and the second opto-coupler that corresponds with B district's carbon film contact below the keyboard, and A district's carbon film contact below the keyboard is connected with the input negative pole of the first opto-coupler in the opto-coupler group that corresponds in every switching circuit respectively, and B district's carbon film contact below the keyboard is connected with the input negative pole of the second opto-coupler in the opto-coupler group that corresponds in every switching circuit respectively.

In each sound channel switch circuit, the positive and negative pins of the output end of each optical coupler in the optical coupler group are respectively subjected to matrix synthesis with the same output end pins of the optical couplers at the same positions in other optical coupler groups of the same circuit through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins of the related sound source chip.

The working principle of the novel CC combined single chip microcomputer circuit is as follows:

in the two-channel or multi-channel switch circuit, a finger with a finger wire bounces down a key, which is equivalent to that a high-low level control line as the finger wire inputs a low level to the corresponding input ends of all programmed singlechip circuits through a conductor keyboard, and the singlechip circuit matched with the low level control line detects an input signal and controls the corresponding output end to output a low level.

The 5V signal on the VCC lead firstly passes through the input end of the driving optocoupler, the output end is connected with the output end of the single chip microcomputer circuit to form a current loop to start the driving optocoupler, after the driving optocoupler is started, the 5V signal on the VCC lead is connected with the input end anode of the driving optocoupler, the cathode pin is connected with the first optocoupler and the input end anode of the second optocoupler, then the 5V signal is further transmitted to the A area carbon film contact connected with the driving optocoupler through the input end cathode of the first optocoupler, the 5V signal is transmitted to the B area carbon film contact connected with the second optocoupler through the input end cathode of the second optocoupler, the piano key is flicked down, under the action of the conductive rubber, the A area, the C area carbon film contact and the B area carbon film contact are sequentially conducted, the 5V signal from the VCC lead can be transmitted to the C area carbon film contact, the C area carbon film contact with the 5V signal is connected with the output end corresponding to the circuit through a diode, the low level signal on the output end of the output end carbon film contact is formed with the output end of the output end carbon film, the output end of the first optocoupler and the second optocoupler can be further started, the sound sampling chip can be sequentially conducted, and the sound sampling chip can be played back.

The switch circuit combining the single chip circuit and the optocoupler set is selected, and a directional diode is also applied, so that the current direction of a direct current power supply is not required to be opposite, and two or more optocoupler sets corresponding to the same key can be prevented from forming a current loop when the keys are touched by different high-low level control lines without applying an optocoupler normally-closed solid-state relay.

Each single chip microcomputer needs to be programmed, and communication needs to be established between the single chip microcomputers so that a plurality of control lines share the same group of input/output ports without mutual influence. The application of the single chip circuit to the electronic keyboard musical instrument takes a six-channel 61-key electronic organ as an example: the key type keyboard is realized by six groups of single chip microcomputer circuits, each group of single chip microcomputer circuits comprises 61 input ends and 61 output ends corresponding to the keys and a common point, and when the common point is contacted with one or more input ends to form a current loop signal, the group of signals are collected by a single chip microcomputer and are output in the group;

take one group as an example: the method mainly utilizes a single chip microcomputer IO pin high-speed polling control mode, corresponding operation can be completed within tens of microseconds, after a group of single chip microcomputers receive executable operation instructions, the common point is set to be at a low level, then 61 input signals are respectively read through 8 pieces of 74HC245, the read result is stored in a register, the read signals are output through 8 pieces of 74HC573, if the input signals are changed, an optical coupler connected with an output end can be changed, when the instructions received by the single chip microcomputers do not accord with own instructions, the single chip microcomputers set the common point to be at a high level, the group of circuits stop working, and other groups also have the same principle.

The principle of the first set of single chip circuits is: the single-chip microcomputer control circuit can actively send out instructions to control the working states of six single-chip microcomputers, and the instructions can be changed at intervals to enable all the single-chip microcomputers to work in turn, so that the collection of 61-by-6 groups of signals in the group is realized, and the output of the circuits cannot interfere with each other.

Fig. 3 is a block diagram showing a new CC assembly structure of the electronic keyboard instrument.

CC101 is a conductor keypad in the figure. CC102 is a block a carbon film contact. CC103 is a C-block carbon film contact. CC104 is a B-block carbon film contact. CC105 is a conductor glove. The CC106 is the wire output on the conductor glove. The CC107 is a single chip circuit. CC108 is an input of the single chip circuit. CC109 is the output of the single chip circuit. The CC110 is a high-low level control line led out by the singlechip circuit. CC111 is a VCC lead wire drawn from the single chip circuit. CC112 is a drive optocoupler. CC113 is a first optocoupler. CC114 is a second optocoupler. CC115 is a diode connected to the C-block carbon film contact. The CC116 is an audio source chip. CC117 is an audio chip a-area pin. CC118 is the audio chip area C pin. CC119 is the audio chip B area pin.

In the implementation mode of the novel CC combined single chip microcomputer circuit:

(1) Two or more individuals with the functions of the traditional electronic keyboard instrument are applied, corresponding to the left hand, the right hand or each finger of the playing keyboard instrument respectively, and all the individuals with the functions of the traditional electronic keyboard instrument share one layer of conductor keys CC101 and carbon film contacts below the keys.

(2) The carbon film contacts under the keys are divided into relatively independent a-region carbon film contacts CC102, relatively independent C-region carbon film contacts CC103, and relatively independent B-region carbon film contacts CC104.

(3) A switch circuit is arranged between carbon film contacts below keys and sound source chips CC106 corresponding to left and right hands playing the keyboard instrument or different fingers playing the keyboard instrument, and the switch circuit comprises a single chip circuit CC107 and optical coupler groups with the same number as the keys.

(4) In two or more single chip microcomputer circuits CC107, input terminals CC108 at the same position are connected together by wires to the corresponding conductor keys CC 101. ( For example: the first input ends of different single chip circuits are combined together and connected with the first conductor keys; the second input ends of different single chip circuits are combined together and connected with keys of a second conductor (8230); 8230 )

(5) In the single tone double-keyboard strength sensing structure, each optical coupler group of the new CC combined switch circuit comprises three optical couplers, wherein the first optical coupler is called a driving optical coupler CC112, the second optical coupler is called a first optical coupler CC113, and the third optical coupler is called a second optical coupler CC114. The driving optocoupler CC112 provides VCC signals to the first optocoupler CC113 and the second optocoupler CC114 inputs when turned on.

(6) In each switch circuit, the positive electrode of the input end and the positive electrode of the output end of the driving optocoupler CC112 are connected with a VCC end lead CC111 in the singlechip circuit CC107, the negative electrode of the input end of the driving optocoupler CC112 is connected with the output end CC109 corresponding to the singlechip circuit CC107, and the negative electrode of the output end of the driving optocoupler CC112 is connected with the positive electrodes of the input ends of the first optocoupler CC113 and the second optocoupler CC114.

(7) The cathode of the input end of a first optocoupler CC113 in the optocoupler set is connected with a carbon film contact CC102 in the area A below the corresponding key, and the cathode of the input end of a second optocoupler CC114 is connected with a carbon film contact CC104 in the area B below the corresponding key.

(8) In all the optical coupler groups, a positive pin of an output end of a first optical coupler CC113 and a positive pin of an output end of the first optical coupler CC113 in other optical coupler groups of the same circuit are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a pin CC117 in an A area in a relevant sound source chip CC 116; a negative pin of an output end of the first optocoupler CC113 and a negative pin of an output end of the first optocoupler CC113 in other optocoupler groups of the same circuit are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with corresponding pins in a C-area pin CC118 in a related sound source chip CC 116;

in all the optical coupler groups, an output end positive electrode pin of the second optical coupler CC114 and an output end positive electrode pin of the second optical coupler CC114 in other optical coupler groups of the same circuit are subjected to matrix synthesis and then are connected with a corresponding pin in a B area pin CC119 in a related sound source chip CC 116; and a negative pin of an output end of the second optical coupler CC114 in other optical coupler groups of the same circuit are subjected to matrix synthesis, and then are connected with corresponding pins in a pin CC118 of a C area of a related sound source chip.

(9) A directional diode CC115 is required to be arranged between the C-region carbon film contact CC103 under the key and the output terminal CC109 corresponding to each one-chip microcomputer circuit CC 107.

(10) Playing the stereo electronic keyboard instrument uses a conductor glove CC105 with a finger lead CC106 and a conductor finger end, and each single chip microcomputer circuit is connected with a corresponding lead output CC106 on the conductor glove CC105 through a high-low level control line CC 110.

(11) A two-channel stereo electronic keyboard instrument needs two traditional electronic keyboard instrument individuals which are relatively independent and two single chip microcomputer circuits, a control wire is led out from each single chip microcomputer circuit and is respectively connected with a wire output end on each conductor glove of hands, and carbon film contacts below keys are connected with two sound source chips through the two single chip microcomputer circuits, so that the left and right two-channel stereo can be realized.

(12) Six-channel stereo electronic keyboard instrument needs six independent traditional electronic keyboard instrument individuals and six single chip microcomputer circuits, six control wires led out from the six single chip microcomputer circuits are connected with wire output ends on two-hand conductor gloves, thumb finger wires on the left-hand conductor glove and the right-hand conductor glove respectively correspond to one single chip microcomputer circuit, finger wires of a forefinger and a middle finger on the left-hand conductor glove and the right-hand conductor glove are combined to respectively correspond to one single chip microcomputer circuit, finger wires of a ring finger and a little finger on the left-hand conductor glove and the right-hand conductor glove are combined to respectively correspond to one single chip microcomputer circuit, and contacts below a key carbon film are connected with six sound source chips through the six single chip microcomputer circuits, so that six-channel stereo can be realized.

(13) A ten-channel stereo electronic keyboard instrument needs ten traditional electronic keyboard instrument individuals which are relatively independent and ten single chip microcomputer circuits, ten control wires are led out from the ten single chip microcomputer circuits and connected with wire output ends on two-hand conductor gloves, each finger wire on the left-hand conductor glove and each finger wire on the right-hand conductor glove correspond to one single chip microcomputer circuit, carbon film contacts below keys are connected with ten sound source chips through the ten single chip microcomputer circuits, and ten-channel stereo can be achieved.

(14) The monolithic computer circuit consists of a monolithic computer and an expansion chip, and 61 input IO ports and 61 output IO ports of the monolithic computer circuit are needed for the 61-key electronic organ.

(15) The optical coupler is a P281 patch optical coupler, the single chip microcomputer is a 51 single chip microcomputer, and other available models of the same type can be selected.

(16) After further development of products, a plurality of conventional electronic keyboard musical instruments constituting a stereo electronic keyboard musical instrument are desired to be formed into an integral structure, first including a plurality of circuit boards, and second a plurality of circuit boards are further combined.

Embodiment 4: technical scheme of old CC combined single chip microcomputer circuit

In the two-channel or multi-channel switch circuit, each switch circuit comprises a single chip circuit and optical coupler groups with the number consistent with that of keys;

in each single chip microcomputer circuit, an optical coupler group is arranged between the relatively independent output end and a VCC conducting wire;

each single chip microcomputer circuit needs to lead out a high-low level control line to be connected with a lead output end on the conductor glove; in each single chip microcomputer circuit, the VCC conducting wire is connected with the positive electrode of the input end of each optocoupler in the optocoupler group corresponding to all the conductor keys, and the negative electrode of the input end of each optocoupler in the optocoupler group is connected with the output end corresponding to the single chip microcomputer circuit.

In the two-channel or multi-channel switch circuit, one pin of the output end of each optical coupler in the optical coupler group is connected with a corresponding carbon film contact end lead, and the other pin of the output end of each optical coupler in the optical coupler group is subjected to matrix synthesis with the same pin of the optical couplers at the same position in other optical coupler groups of the same circuit through a matrix key rule of a traditional electronic keyboard instrument and then is connected with a corresponding pin of a related sound source chip.

The working principle of the old CC combined single chip microcomputer circuit is as follows:

in the two-channel or multi-channel switch circuit, a finger with a finger wire bounces down a key, namely a high-low level control line serving as the finger wire inputs a low level to input ends corresponding to all programmed singlechip circuits through a conductor keyboard, and the singlechip circuit matched with the low level control line detects an input signal and controls a corresponding output end to output a low level.

In each switch circuit, a VCC lead is connected with the positive electrode of the input end of the optocoupler in all optocoupler groups, and the negative electrode of the input end of the optocoupler in each optocoupler group is connected with the corresponding output end of the singlechip circuit.

Two or more than two single chip microcomputer circuits are combined, different keys are simultaneously flicked down by a left hand, a right hand or each finger, an optical coupler in an optical coupler group corresponding to the keys in the relevant single chip microcomputer circuit is started, and connecting lines between carbon film contacts of different partitions and corresponding pins of a sound source chip are further conducted through output ends of the optical couplers in the optical coupler group, so that two-channel or multi-channel stereo is realized.

The switch circuit combining the single chip microcomputer circuit and the optical coupler groups is selected, the current direction of a direct-current power supply is not required to be opposite, and two or more optical coupler groups corresponding to the same key can be prevented from forming a current loop when the keys are touched by different high and low level control lines without applying an optical coupler normally-closed solid-state relay.

Fig. 4 is a block diagram schematically showing an old CC composite structure of the electronic keyboard instrument.

CC201 in the figure is a conductor keypad. CC202 is an a-block carbon film contact. CC203 is a C-block carbon film contact. CC204 is a B-block carbon film contact. The CC205 is a conductor glove. CC206 is the wire output on the conductor glove. The CC207 is a single chip circuit. CC208 is an input of the single chip circuit. The CC209 is an output terminal of the single chip circuit. The CC210 is a high-low level control line led out by the singlechip circuit. The CC211 is a VCC conductor led out from the singlechip circuit. CC212 is a first optocoupler. CC213 is a second optocoupler. CC214 is a third optocoupler. CC215 is an audio source chip. CC216 is the audio chip a block pin. CC217 is the audio chip C area pin. CC218 is the audio chip B area pin.

In this embodiment of the old CC combination single chip circuit:

(1) Two or more individuals with the functions of the traditional electronic keyboard instrument are applied, corresponding to the left hand, the right hand or each finger of the playing keyboard instrument respectively, and all the individuals with the functions of the traditional electronic keyboard instrument share one layer of conductor keys CC201 and carbon film contacts below the keys.

(2) The carbon film contacts below the keys are divided into relatively independent a-region carbon film contacts CC202, relatively independent C-region carbon film contacts CC203, and relatively independent B-region carbon film contacts CC204.

(3) A switch circuit is arranged between carbon film contacts below the keys and sound source chips CC215 corresponding to the left hand and the right hand playing the keyboard instrument or different fingers playing the keyboard instrument, and the switch circuit is composed of a single chip microcomputer circuit CC207 and optical coupler groups with the same number as the keys.

(4) In two or more single chip circuit CC207, the input terminals CC208 at the same position are connected together by wires to the corresponding conductor keypad CC 201.

(5) In the switch circuit of the single-tone double-keyboard strength induction structure, an optical coupler in each optical coupler group comprises a first optical coupler CC212, a second optical coupler CC213 and a third optical coupler CC214, a VCC end lead CC211 of a single chip microcomputer circuit CC207 is connected with the positive electrode of the input end of each optical coupler in the optical coupler group, and the negative electrode of the input end of each optical coupler is connected with an output end CC209 corresponding to the single chip microcomputer circuit CC 207. The negative electrode of the output end of a first optocoupler CC212 in each optocoupler set is connected with a carbon film contact CC202 in the area A below the corresponding key, the positive electrode of the output end of a second optocoupler CC213 is connected with a carbon film contact CC203 in the area C below the corresponding key, and the negative electrode of the output end of a third optocoupler CC214 is connected with a carbon film contact CC204 in the area B below the corresponding key.

(6) In each optocoupler group of each switch circuit, the positive electrode of the output end of the first optocoupler CC212 and the positive electrode of the output end of the first optocoupler CC212 in other optocoupler groups of the same circuit are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a pin CC216 in an area A in a relevant sound source chip CC 215; the output end negative pin of the second optical coupler CC213 and the output end negative pin of the second optical coupler CC213 in other optical coupler groups of the same circuit are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a C area pin CC217 in a related sound source chip CC 215; the output end anode of the third optical coupler CC214 and the output end anode pin of the third optical coupler CC214 in other optical coupler groups of the same circuit are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins in the B area pin CC218 in the relevant sound source chip CC 215.

(7) Playing the stereo electronic keyboard instrument will use the conductor glove CC205 with finger wire and conductor finger tip, and each single chip circuit CC207 needs to lead out a high-low level control wire CC210 to connect with the wire output terminal on the conductor glove CC 205.

(8) Two-channel stereo electronic keyboard instrument needs two independent traditional electronic keyboard instrument individuals and two single chip microcomputer circuits, two control wires are led out from the two single chip microcomputer circuits and are connected with the wire output ends on the conductor gloves of both hands one by one, and carbon film contacts below keys are connected with two sound source chips through the two single chip microcomputer circuits, so that the left and right channel stereo can be realized.

(9) Six-channel stereo electronic keyboard instrument needs six independent traditional electronic keyboard instrument individuals and six single chip microcomputer circuits, six control wires led out from the six single chip microcomputer circuits are connected with wire output ends on two-hand conductor gloves, thumb finger wires on the left-hand conductor glove and the right-hand conductor glove respectively correspond to one single chip microcomputer circuit, finger wires of a forefinger and a middle finger on the left-hand conductor glove and the right-hand conductor glove are combined to respectively correspond to one single chip microcomputer circuit, finger wires of a ring finger and a little finger on the left-hand conductor glove and the right-hand conductor glove are combined to respectively correspond to one single chip microcomputer circuit, and contacts below a key carbon film are connected with six sound source chips through the six single chip microcomputer circuits, so that six-channel stereo can be realized.

(10) A ten-channel stereo electronic keyboard instrument needs ten traditional electronic keyboard instrument individuals which are relatively independent and ten single chip microcomputer circuits, ten control wires are led out from the ten single chip microcomputer circuits and are connected with wire output ends on two-hand conductor gloves, each finger wire on the left-hand conductor glove and the right-hand conductor glove corresponds to one single chip microcomputer circuit, carbon film contacts below keys are connected with ten sound source chips through the ten single chip microcomputer circuits, and ten-channel stereo sound can be achieved.

Embodiment 5: technical scheme of novel BB combined circuit

The switching circuit comprises a left sound channel switching circuit and a right sound channel switching circuit; the left sound channel switch circuit and the right sound channel switch circuit comprise independent direct current power supplies and optical coupler groups with the number consistent with that of the keys; the current directions of the left channel switch circuit and the right channel switch circuit are opposite. The left sound channel switch circuit is provided with the optocoupler set between a positive lead of a direct current power supply and a carbon film contact of an area A and an area B below each conductor key, and a negative lead of the direct current power supply is connected with a lead output end on the left sound channel conductor glove; the right sound channel switch circuit is provided with the optocoupler set between a negative lead of another direct current power supply and the carbon film contacts in the area A and the area B below each conductor key, and a positive lead of the direct current power supply is connected with a finger lead on the right sound channel conductor glove; and the C-area carbon film contact is connected with the corresponding conductor keyboard.

In the left and right channel switch circuits, each optical coupler group in each switch circuit comprises a first optical coupler corresponding to the carbon film contacts of the area A and the area C below the keyboard and a second optical coupler corresponding to the carbon film contacts of the area B and the area C below the keyboard,

the carbon film contact of area A under the keyboard is respectively connected with the negative electrode of the input end of the first optical coupler in the corresponding optical coupler group in each switch circuit, the carbon film contact of area B under the keyboard is respectively connected with the negative electrode of the input end of the second optical coupler in the corresponding optical coupler group in each switch circuit,

The new BB combined circuit working principle:

in a left side, in the right sound channel switch circuit, the key is down played to the left hand that has the finger wire, the opto-coupler in the opto-coupler group between the carbon film contact below left channel DC power supply and the conductor keyboard that corresponds forms the current loop and is started, the key is down played to the right hand that has the finger wire, the opto-coupler in the opto-coupler group between the carbon film contact below right channel DC power supply and the conductor keyboard that corresponds forms the current loop and is started, the different keys are down played simultaneously to the both hands finger, two switch circuits work simultaneously, the opto-coupler in the opto-coupler group that corresponds in two circuits can be started simultaneously, the pin that the relevant sound source chip that every opto-coupler output both ends are connected through the wire corresponds will be switched on, can play two sound channel stereophonic sound.

Two switch circuit current opposite direction can not let through the finger wire when both hands touch the key simultaneously and form the current loop between the left and right sound channel opto-coupler group under the same key.

Fig. 5 is a schematic diagram of the circuit connection associated with the new BB assembly structure of the electronic keyboard musical instrument.

In the figure, BB101 is a conductor keypad. BB102 is an a-block carbon film contact. BB103 is a C-block carbon film contact. BB104 is a B-block carbon film contact. BB105 is a left channel conductor glove. BB106 is the wire output on a conductive glove. BB107 is the left channel dc supply. BB108 is the left channel first opto-coupler. BB109 is the left channel second optocoupler. BB110 is a left channel audio source chip. BB111 is the left channel audio source chip a area pin. BB112 is the left channel audio source chip C-block pin. BB113 is the left channel audio source chip B-block pin. BB114 is a right channel conductor glove. BB115 is a finger lead on a conductive glove. BB116 is the right channel dc supply. BB117 is the right channel first opto-coupler. BB118 is the right channel second optocoupler. BB119 is a right channel source chip. BB120 is the pin of the right channel audio source chip area a. BB121 is a pin of the right channel audio source chip C area. BB122 is a right channel source chip B-area pin.

In an embodiment of the new BB combinatorial circuit:

(1) Two relatively independent individuals with the functions of the traditional electronic keyboard instrument are applied and respectively correspond to the left hand and the right hand of a playing keyboard instrument, and the two relatively independent individuals with the functions of the traditional electronic keyboard instrument share a layer of conductor keys BB101 and carbon film contacts below the keys.

(2) The carbon film contacts under the keys are divided into relatively independent a-region carbon film contacts BB102, relatively independent C-region carbon film contacts BB103, and relatively independent B-region carbon film contacts BB104.

(3) Two groups of switch circuits corresponding to the left and right sound channels are arranged between the carbon film contact and the sound source chips in the two sounding source units, each group of switch circuits comprises a direct-current power supply and an optical coupler group with the same number as keys, each optical coupler group comprises two optical couplers corresponding to the A-area carbon film contact BB102 and the B-area carbon film contact BB104, and the two optical couplers are called as a first optical coupler and a second optical coupler.

(4) The positive wire of a direct-current power supply BB107 of the left channel switch circuit is connected with the positive electrodes of the input ends of a first optical coupler BB108 and a second optical coupler BB109, the negative electrode of the input end of the first optical coupler BB108 is connected with a corresponding A-area carbon film contact BB102, and the negative electrode of the input end of the second optical coupler BB109 is connected with a corresponding B-area carbon film contact BB 104;

(5) The cathode lead of a direct current power supply BB116 of the right channel switch circuit is connected with the cathodes of the input ends of the first optical coupler BB117 and the second optical coupler BB118, the anode of the input end of the first optical coupler BB117 is connected with the corresponding A-region carbon film contact BB102, and the anode of the input end of the second optical coupler BB118 is connected with the corresponding B-region carbon film contact BB104.

(6) In the left channel optical coupler group, a positive pin of an output end of a first optical coupler BB108 and a positive pin of an output end of the first optical coupler BB108 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in an A area pin BB111 in a left channel sound source chip BB 110; a negative pin of an output end of the first optical coupler BB108 in the first optical coupler group and a negative pin of an output end of the first optical coupler BB108 in the other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a C-area pin BB112 in a left-channel sound source chip BB 110;

(7) In the right channel optical coupler group, a positive terminal pin of an output end of a first optical coupler BB117 and a positive terminal pin of an output end of the first optical coupler BB117 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with a corresponding pin in an A area pin BB120 in a right channel sound source chip BB 119; the negative pin of the output end of the first optical coupler BB117 and the negative pin of the output end of the first optical coupler BB117 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a C-area pin BB121 in a right-channel sound source chip BB 119;

(8) In the left channel optical coupler group, the positive pin of the output end of the second optical coupler BB109 and the positive pin of the output end of the second optical coupler BB109 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins in the B area pin BB113 in the left channel sound source chip BB 110; and a negative pin of an output end of the second optical coupler BB109 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with a corresponding pin in a C-area pin BB112 in a left-channel sound source chip BB 110.

(9) In the right channel optical coupler group, the positive pin of the output end of the second optical coupler BB118 and the positive pin of the output end of the second optical coupler BB118 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a B area pin BB122 in a right channel sound source chip BB 119; and a negative pin of an output end of the second optical coupler BB118 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a C area pin BB121 in a right sound channel sound source chip BB 119.

(10) Wherein the conductor keyboard BB101 is connected to the corresponding C-region carbon film contact BB 103.

(11) Finger leads are respectively arranged on the left sound channel conductor glove BB105 and the right sound channel conductor glove BB114, a lead output end BB106 on the left glove is connected with the negative electrode of a left sound channel direct current power supply BB107, and a lead output end BB115 on the right glove is connected with the positive electrode of a right sound channel direct current power supply BB 116.

Embodiment 6: technical scheme of old BB combined circuit

The switch circuit comprises a left sound channel switch circuit and a right sound channel switch circuit, the left sound channel switch circuit and the right sound channel switch circuit comprise independent direct-current power supplies and optical coupler groups with the same number with keys, and the current directions of the two circuits of the left sound channel switch circuit and the right sound channel switch circuit are opposite.

The left sound channel switch circuit is provided with the optocoupler set between a positive lead of a direct current power supply and each conductor key, and a negative lead of the direct current power supply is connected with a lead output end on the left sound channel conductor glove; the right sound channel switch circuit is provided with the optocoupler set between a negative lead of another direct current power supply and each conductor key, and a positive lead of the direct current power supply is connected with a lead output end on the right sound channel conductor glove.

Working principle of the old BB combined circuit:

in a left side, in the right sound channel switch circuit, the key is down played to the left hand that has the finger wire, the opto-coupler in the opto-coupler group between left sound channel DC power supply and the conductor keyboard that corresponds forms the current loop and is started, the key is down played to the right hand that has the finger wire, the opto-coupler in the opto-coupler group between right sound channel DC power supply and the conductor keyboard that corresponds forms the current loop and is started, the different keys are down played simultaneously to the both hands finger, can start the opto-coupler in corresponding opto-coupler group in two switch circuits simultaneously, further switch on the carbon film through the output of opto-coupler and correspond the line between the pin with relevant sound source chip, will play the stereo that the sound source was set out different.

Two switch circuit current direction are opposite, can not let through the finger wire when both hands touch the key simultaneously and form the current return circuit between the left and right sound channel opto-coupler group under the same key.

Fig. 6 is a schematic circuit connection diagram relating to the old BB composite structure of the electronic keyboard musical instrument.

In the figure, BB201 is a conductor keypad. BB202 is an a-block carbon film contact. BB203 is a C-block carbon film contact. BB204 is a B-block carbon film contact. BB205 is a left channel conductor glove. BB206 is the wire output on the conductor glove. BB207 is the left channel dc supply. BB208 is the left channel first optocoupler. BB209 is the left channel second optocoupler. BB210 is the left channel third optocoupler. BB211 is the left channel source chip. BB212 is the left channel audio source chip a-block pin. BB213 is a left channel source chip C-block pin. BB214 is the left channel source chip B-block pin. BB215 is a right channel conductor glove. BB216 is the wire output on the conductor glove. BB217 is the right channel dc supply. BB218 is the right channel first opto-coupler. BB219 is the right channel second optocoupler. BB220 is the right channel third optocoupler. BB221 is a right channel source chip. BB222 is the pin of the right channel audio source chip a-block. BB223 is the pin of the right channel audio source chip C area. BB224 is the right channel source chip B-block pin.

In an embodiment of the old BB combinational circuit:

(1) Two relatively independent individuals with the functions of the traditional electronic keyboard instrument are applied and respectively correspond to the left hand and the right hand of a playing keyboard instrument, and the two relatively independent individuals with the functions of the traditional electronic keyboard instrument share a layer of conductor keys BB201 and carbon film contacts below the keys.

(2) The carbon film contacts under the keys are divided into relatively independent a-region carbon film contacts BB202, relatively independent C-region carbon film contacts BB203, and relatively independent B-region carbon film contacts BB204.

(3) Two groups of switch circuits corresponding to the left and right sound channels are arranged between the carbon film contact and the two sound source chips of the traditional electronic keyboard musical instrument, and each group of switch circuits comprises a relatively independent direct-current power supply and optocoupler groups with the same number as the keys.

(4) Under the single tone color double strength induction key mode, the optical coupling group comprises a first optical coupler, a second optical coupler and a third optical coupler.

(5) The positive wire of a direct current power supply BB207 of the left sound channel switching circuit is connected with the positive electrodes of the input ends of all the optocouplers in the optocoupler group, and the negative electrodes of the input ends of all the optocouplers in the optocoupler group are connected with the corresponding conductor keyboard BB 201; and the negative electrode lead of a direct current power supply BB217 of the right sound channel switching circuit is connected with the negative electrode of the input end of the optical coupler in the optical coupler group, and the positive electrodes of the input ends of all the optical couplers in the optical coupler group are connected with the corresponding conductor keyboard BB 201.

(6) In the left and right sound channel switch circuits, the negative pole of the output end of a first optical coupler in all optical coupler groups is connected with a carbon film contact BB202 in the area A below the corresponding keyboard, the positive pole of the output end of a second optical coupler is connected with a carbon film contact BB203 in the area C below the corresponding keyboard, and the negative pole of the output end of a third optical coupler is connected with a carbon film contact BB204 in the area B below the corresponding keyboard.

(7) In each optical coupler group of the left channel switch circuit, the anode of the output end of the first optical coupler BB208 and the anode of the output end of the first optical coupler BB208 in other optical coupler groups are synthesized through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a pin BB212 in an area A in a left channel sound source chip BB 211; the negative pin of the output end of the second optical coupler BB209 and the negative pin of the output end of the second optical coupler BB209 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a C-area pin BB213 in a left sound channel sound source chip BB 211; and the anode of the output end of the third optical coupler BB210 and the anode pin of the output end of the third optical coupler BB210 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a B area pin BB214 in a left sound channel sound source chip BB 211.

(8) In each optocoupler group of the right channel switch circuit, the anode of the output end of the first optocoupler BB218 and the anode of the output end of the first optocoupler BB218 in other optocoupler groups are synthesized through a matrix key rule of a traditional electronic keyboard instrument and then connected with a corresponding pin in a pin BB222 of an A area in a right channel sound source chip BB 221; the negative pin of the output end of the second optical coupler BB219 and the negative pin of the output end of the second optical coupler BB219 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with a corresponding pin in a C-area pin BB223 in a right-channel sound source chip BB 221; and the anode of the output end of the third optical coupler BB220 and the anode pin of the output end of the third optical coupler BB220 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a B area pin BB224 in a right channel sound source chip BB 221.

(9) Finger leads are arranged on the conductor gloves, a lead output end BB206 on the left-hand conductor glove BB205 is connected with the negative electrode of the left-channel direct-current power supply BB207, and a lead output end BB216 on the right-hand conductor glove BB215 is connected with the positive electrode of the right-channel direct-current power supply BB 217.

Embodiment 7: technical scheme of AA combined keyboard partition fixing structure

An electronic keyboard musical instrument includes keys and carbon film contacts thereunder, and a sound source chip on a main board in an individual of a conventional electronic keyboard musical instrument. All the keys are divided into a left keyboard and a right keyboard, and a left sound channel switch circuit is arranged between a carbon film contact below the keys in the left keyboard area and a left sound channel sound source chip; a right sound channel switch circuit is arranged between the carbon film contact below the keys of the right keyboard area and the right sound channel sound source chip;

the carbon film contacts of the area A and the area B are relatively independent, and all the carbon film contacts of the area C below the keyboard are combined together and connected with a negative lead of a direct-current power supply;

the left sound channel switch circuit and the right sound channel switch circuit comprise a common direct-current power supply and optocoupler groups with the same number with the corresponding partition keys;

in the left sound channel switch circuit, a left sound channel optical coupler group is arranged between a positive lead of the direct current power supply and the carbon film contacts of the A area and the B area which are relatively independent under each key of the left keyboard area;

in the right sound channel switch circuit, a right sound channel optical coupler group is arranged between a positive electrode lead of the direct current power supply and relatively independent carbon film contacts in an area A and an area B below each key in the area of the right keyboard;

in the left and right channel switch circuits, each optical coupler group in each switch circuit comprises a first optical coupler corresponding to the carbon film contacts in the area A and the area C below the keyboard and a second optical coupler corresponding to the carbon film contacts in the area B and the area C below the keyboard;

the carbon film contact of the area A below the keyboard is respectively connected with the negative electrode of the input end of a first optical coupler in the optical coupler group corresponding to each switch circuit, and the carbon film contact of the area B below the keyboard is respectively connected with the negative electrode of the input end of a second optical coupler in the optical coupler group corresponding to each switch circuit;

in each sound channel switch circuit, the positive and negative pins of the output end of each optical coupler in the optical coupler group are respectively synthesized with the same output end pins of the optical couplers at the same positions in other optical coupler groups of the same circuit through the matrix key rule of the matrix traditional electronic keyboard instrument, and then are connected with the corresponding pins of the related sound source chip.

The AA combined keyboard partition fixing structure circuit working principle is as follows:

the positive wire of the direct current power supply can be connected with the A-area carbon film contact below the corresponding keyboard through the input end of the first optical coupler in each optical coupler group connected with the positive wire, and also can be connected with the B-area carbon film contact below the corresponding keyboard through the input end of the second optical coupler, when the keys are pressed down, positive charges on the A-area carbon film contact and the B-area carbon film contact can be transmitted to the C-area carbon film contact through conductive rubber, the C-area carbon film contact is connected with the negative wire of the direct current power supply, a current loop is formed, the first optical coupler and the second optical coupler corresponding to the lower surface of the keyboard are started successively, and because the output end of the second optical coupler of the first optical coupler is connected with the corresponding pin of the related sound source chip through the wire, the pins corresponding to the related sound source chip connected with the first optical coupler can be further switched on, and the keys are bounced down by fingers in respective keyboard areas, so that the left-hand touch key left sound channel and the right hand touch key sound channel are sounded.

Fig. 7 is a schematic view of the fixing structure of the AA combination section of the electronic keyboard instrument.

In the drawing, AA101 is an A-block carbon film contact. AA102 is a C-block carbon film contact. AA103 is a B-block carbon film contact. AA104 is a dc power supply. AA105 is the left channel first opto-coupler. AA106 is the left channel second optocoupler. AA107 is a left channel audio source chip. AA108 is the left channel audio source chip a-block pin. AA109 is the left channel source chip area C pin. AA110 is the left channel audio source chip B-area pin. AA111 is the right channel first opto-coupler. AA112 is a right channel second optocoupler. AA113 is a right channel audio source chip. AA114 is the right channel audio source chip a-block pin. AA115 is the right channel audio source chip zone C pin. AA116 is the right channel audio source chip B-area pin.

In the embodiment of the partition fixing structure of the AA combined keyboard, the following steps are carried out:

(1) Two relatively independent individuals with the functions of the traditional electronic keyboard instrument are applied and respectively correspond to the left hand and the right hand of the playing keyboard instrument, a single-layer keyboard or two-layer keyboards of the playing keyboard instrument are divided into two groups, and each group of keyboards and carbon film contacts below the keyboards correspond to one individual with the functions of the traditional electronic keyboard instrument.

(2) The carbon film contacts below the keys are divided into an A-area carbon film contact AA101, a C-area carbon film contact AA102 and a B-area carbon film contact AA103, wherein the A-area carbon film contact AA101 and the B-area carbon film contact AA103 below each key are relatively independent, and all the C-area carbon film contacts AA102 below each group of keyboards are combined together and connected with a negative electrode lead of a direct current power supply AA104 shared by the left sound channel and the right sound channel.

(3) A switch circuit is arranged between the carbon film contact and the sound source chip in each of the individual conventional electronic keyboard musical instruments. Each group of switch circuits comprises a direct-current power supply AA104 and optocoupler groups with the same number as the partition keys.

(4) Under the single tone color double strength induction mode, each optical coupler group comprises two optical couplers corresponding to an A-area carbon film contact AA101 and a B-area carbon film contact AA103, and the two optical couplers are called as a first optical coupler and a second optical coupler. The positive electrodes of the input ends of the two optical couplers are connected with the positive electrode lead of a direct current power supply AA104, and the negative electrodes of the input ends of the two optical couplers are respectively connected with the corresponding area A carbon film contact AA101 and the area B carbon film contact AA103 which are relatively independent under the keyboard one to one.

(5) In the left channel optical coupler group, a positive electrode pin of an output end of a first optical coupler AA105 and a positive electrode pin of an output end of the first optical coupler AA105 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in an A area pin AA108 in a left channel sound source chip AA 107; and a negative pin of an output end of the first optical coupler AA105 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with a corresponding pin in a C area pin AA109 in a left sound channel sound source chip AA 107.

(6) In the right channel optical coupler group, a positive electrode pin of an output end of a first optical coupler AA111 and a positive electrode pin of an output end of a first optical coupler AA111 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in an area A pin AA114 in a right channel sound source chip AA 113; and a negative pin of an output end of the first optical coupler AA111 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with a corresponding pin in a C area pin AA115 in a right sound channel sound source chip AA 113.

(7) In the left channel optical coupler group, a positive electrode pin at the output end of the second optical coupler AA106 and a positive electrode pin at the output end of the second optical coupler AA106 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with a corresponding pin in a B area pin AA110 in a left channel sound source chip AA 107; and a negative pin of an output end of the second optical coupler AA106 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument and then are connected with a corresponding pin in a C area pin AA109 in the left channel sound source chip AA 107.

(8) In the right channel optical coupler group, a positive electrode pin at the output end of the second optical coupler AA112 and a positive electrode pin at the output end of the second optical coupler AA112 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a B area pin AA116 in a right channel sound source chip AA 113; and a negative pin of an output end of the second optical coupler AA112 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument, and then are connected with a corresponding pin in a C area pin AA115 in a right channel sound source chip AA 113.

Embodiment mode 8: technical scheme of AA combined keyboard partition adjustable structure

An electronic keyboard musical instrument includes a keyboard and carbon film contacts thereunder and an audio source chip on a main board in a conventional electronic keyboard musical instrument unit;

switch circuits are arranged between carbon film contacts below the keys and the sound source chips corresponding to the left hand and the right hand respectively;

the switching circuit comprises a left sound channel switching circuit and a right sound channel switching circuit; the left sound channel switch circuit and the right sound channel switch circuit comprise a common direct-current power supply and optocoupler groups with the same number as the keys; in the left sound channel switch circuit, a left sound channel optical coupler group is arranged between an anode lead of the direct current power supply and carbon film contacts in an area A and an area B below corresponding keys after passing through an anode and a cathode of an output end of an optical coupler normally-closed solid-state relay corresponding to each key;

in the right sound channel switch circuit, after a positive lead of the direct current power supply passes through a positive electrode and a negative electrode of an output end of a common optocoupler corresponding to each key, a right sound channel optocoupler group is arranged between the positive lead and a carbon film contact of an area A and an area B below the corresponding key;

an optocoupler normally-closed solid-state relay in the left sound channel switch circuit and the common optocoupler input end anode in the right sound channel switch circuit below the same key are connected with an anode lead of the direct-current power supply together;

the optocoupler normally-closed solid-state relay in the left sound channel switching circuit and the common optocoupler input end cathode in the right sound channel switching circuit below the same key are connected together through a controllable switch and a cathode lead of the direct-current power supply;

the sequential control of the two-in-one switch can realize the expansion of the left-hand keyboard area or the right-hand keyboard area.

In the left and right sound channel or multi-sound channel switch circuits, each optocoupler group in each switch circuit comprises a first optocoupler corresponding to a carbon film contact of an area A and an area C below the keyboard and a second optocoupler corresponding to a carbon film contact of an area B and an area C below the keyboard;

in each sound channel switch circuit, the positive and negative pins of the output end of each optocoupler in the optocoupler group are respectively subjected to matrix synthesis with the same output end pins of the optocouplers at the same positions in other optocoupler groups of the same circuit through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins of the related sound source chips.

The AA combined keyboard partition adjustable structure circuit working principle is as follows:

the switch circuit comprises a left channel switch circuit and a right channel switch circuit corresponding to the left hand and the right hand, and each switch circuit corresponds to one or one group of pronunciation source individuals.

When the optical coupler normally closed solid-state relay of the left channel optical coupler group and the common optical coupler of the right channel optical coupler group are controlled to be powered on, the optical coupler group corresponding to the left channel is powered off, the optical coupler group corresponding to the right channel is powered on, and the keyboard area of the right channel can be expanded to the left channel. On the contrary, when the optical coupler normally closed solid-state relay of the left channel optical coupler group and the common optical coupler of the right channel optical coupler group are controlled to be powered off, the optical coupler group corresponding to the left channel is powered on, and the optical coupler group corresponding to the right channel is powered off, so that the keyboard area of the left channel can be expanded to the right channel. The two-in-one switch needs to be turned off from left to right in sequence when the keyboard area of the left channel is expected to be expanded, and the two-in-one switch needs to be turned on from right to left in sequence when the keyboard area of the right channel is expected to be expanded.

Fig. 8 is a schematic diagram of an adjustable structure of the AA combination partition of the electronic keyboard instrument.

In the figure AA201 is an a-block carbon film contact. AA202 is a C-block carbon film contact. AA203 is a B-block carbon film contact. AA204 is a dc power supply. AA205 may control the switch. AA206 is the left channel first opto-coupler. AA207 is the left channel second optocoupler. AA208 is a left channel normally closed optocoupler solid state relay. AA209 is a left channel audio source chip. AA210 is the left channel audio source chip a-area pin. AA211 is the left channel audio source chip C-block pin. AA212 is the left channel audio source chip B area pin. AA213 is the right channel first optocoupler. AA214 is the right channel second optocoupler. AA215 is the right channel ordinary control optocoupler. AA216 is the right channel audio source chip. AA217 is a right channel audio source chip a-area pin. AA218 is the right channel audio chip area C pin. AA219 is the right channel audio source chip B-block pin.

In the embodiment of the partition adjustable structure of the AA combined keyboard:

(1) Two relatively independent individuals with the functions of the traditional electronic keyboard instrument are applied and respectively correspond to the left hand and the right hand for playing the keyboard instrument, and the two relatively independent individuals with the functions of the traditional electronic keyboard instrument share one layer of keys.

(2) The carbon film contacts below the keys are divided into an A-area carbon film contact AA201, a C-area carbon film contact AA202 and a B-area carbon film contact AA203, wherein the A-area carbon film contact AA201 and the B-area carbon film contact AA203 below each key are relatively independent, and the C-area carbon film contacts AA202 below all the keys are combined together and connected with a negative electrode lead of a direct current power supply AA 204.

(3) Two groups of switch circuits corresponding to the left and right sound channels are arranged between the carbon film contacts and the sound source chips in the two traditional electronic keyboard musical instruments, and each group of switch circuits comprises a common direct-current power supply AA204 and optical coupler groups with the number consistent with that of keys.

(4) In the left sound channel switch circuit, taking 61-key electronic keyboard instrument as an example, the positive wire of the direct current power supply is connected with the positive electrode of the input end of the optocoupler in 61 optocoupler groups of the left sound channel after passing through the positive electrode and the negative electrode of the output end of 61 optocoupler normally closed solid-state relays AA208,

(5) In the right channel switch circuit, taking a 61-key electronic keyboard instrument as an example, the positive lead of the direct current power supply is connected with the positive electrode of the input end of the optocoupler in the 61 optocoupler groups of the right channel after passing through the positive electrode and the negative electrode of the output end of the 61 common control optocouplers AA 215.

(6) The negative electrode of the input end of a first optical coupler AA206 in the left channel optical coupler group is connected with a relatively independent A-area carbon film contact AA201 below the corresponding keyboard, and the negative electrode of the input end of a second optical coupler AA207 is connected with a relatively independent B-area carbon film contact AA203 below the corresponding keyboard.

(7) The negative electrode of the input end of a first optical coupler AA213 in the right channel optical coupler group is connected with a relatively independent A-area carbon film contact AA201 below the corresponding keyboard, and the negative electrode of the input end of a second optical coupler AA214 is connected with a relatively independent B-area carbon film contact AA203 below the corresponding keyboard.

(8) The positive electrodes of the input ends of the optocoupler normally-closed solid-state relay AA208 and the common control optocoupler AA215 are connected with the positive electrode of the direct-current power supply AA204 through a lead, and the negative electrodes of the input ends of the optocoupler normally-closed solid-state relay AA208 and the common control optocoupler AA215 are also connected with the negative electrode of the direct-current power supply AA204 through a relatively independent controllable switch AA205 or other switches.

(9) In the left channel optical coupler group, a positive electrode pin of an output end of a first optical coupler AA206 and a positive electrode pin of an output end of the first optical coupler AA206 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with a corresponding pin in an area A pin AA210 in a left channel sound source chip AA209, a negative electrode pin of an output end of the first optical coupler AA206 in other optical coupler groups is subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument, and then is connected with a corresponding pin in an area C pin AA211 in the left channel sound source chip AA 209;

(10) In the right channel optical coupler group, a positive electrode pin at the output end of the first optical coupler AA213 and a positive electrode pin at the output end of the first optical coupler AA213 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in an A area pin AA217 in a right channel sound source chip AA 216; the negative pin of the output end of the first optical coupler AA213 and the negative pin of the output end of the first optical coupler AA213 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with corresponding pins in a C-area pin AA218 in a right-channel sound source chip AA 216;

(11) In the left channel optical coupler group, a positive electrode pin at the output end of the second optical coupler AA207 and a positive electrode pin at the output end of the second optical coupler AA207 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with corresponding pins in a B area pin AA212 in a left channel sound source chip AA 209; and a negative pin of an output end of the second optical coupler AA207 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument and then are connected with a corresponding pin in a C area pin AA211 in the left sound channel sound source chip AA 209.

(12) In the right channel optical coupler group, a positive electrode pin of an output end of a second optical coupler AA214 and a positive electrode pin of an output end of a second optical coupler AA214 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument, and then are connected with a corresponding pin in a B area pin AA219 in a right channel sound source chip AA 216; and a negative pin of an output end of the second optical coupler AA214 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument and then are connected with a corresponding pin in a C area pin AA218 in a right channel sound source chip AA 216.

Embodiment mode 9: technical scheme for superposing stereo sound

In the two-channel or multi-channel switch circuit, in each optical coupler group of each switch circuit, two or more optical couplers corresponding to carbon film contacts in the area A and the area B below the keyboard are arranged, and the optical couplers respectively control two or more related sound source chips, so that the tone color superposition stereo of the electronic keyboard musical instrument can be realized.

The tone superposition stereo is suitable for an AA combined partition fixed structure, an AA combined partition adjustable structure, a new AB combined structure, a new BB combined structure and a new CC combined structure.

Working principle of tone color superposition stereo:

on the basis of the original AA combined partition fixing structure, the AA combined partition adjustable structure, the new AB combined structure, the new BB combined structure and the new CC combined structure circuit, in each switch circuit, two or more than two relatively independent pronunciation source individuals are simultaneously controlled in a mode of multiplying the number of optical couplers in the optical coupler group, and therefore the tone and color superposition stereo can be achieved.

FIG. 9 is a schematic view showing the tone color superimposition stereo doublet tone color of the electronic keyboard musical instrument

In the figure AA301 is a block a carbon film contact. AA302 is a C-block carbon film contact. AA303 is a B-block carbon film contact. AA304 dc power supply. AA305 is the left channel first opto-coupler. AA306 is the left channel second optocoupler. AA307 is the left channel third optocoupler. AA308 is the left channel fourth optocoupler. AA309 is the left channel first source chip. AA310 is the left channel second source chip. AA311 is the right channel first opto-coupler. AA312 is a right channel second optocoupler. AA313 is the right channel third opto-coupler. AA314 is the right channel fourth opto-coupler. AA315 is a right channel first source chip. AA316 is a right channel second audio source chip.

In this implementation of timbre superimposed stereo:

(1) The specific implementation of the binaural stereo binaural cue mode: taking the AA combination partition fixing structure as an example, in each switch circuit, the optocoupler group corresponding to the lower side of the same key includes a first optocoupler, a second optocoupler, a third optocoupler and a fourth optocoupler. In the left and right sound channel switch circuits, the anodes of the input ends of all the optical couplers are connected with the positive lead of the direct-current power supply, wherein the cathodes of the input ends of the first optical coupler and the third optical coupler are connected with the carbon film contacts AA301, which are relatively independent, of the area A below the corresponding keyboard, and the cathodes of the input ends of the second optical coupler and the fourth optical coupler are connected with the carbon film contacts AA303, which are relatively independent, of the area B below the corresponding keyboard.

(2) In the left channel switch circuit, a positive electrode pin of an output end of a first optical coupler AA305 in an optical coupler group and a positive electrode pin of an output end of a first optical coupler AA305 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then connected with a corresponding pin in a pin of an area A in a left channel first sound source chip AA 309; the negative pin of the output end of the first optical coupler AA305 and the negative pin of the output end of the first optical coupler AA305 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with corresponding pins in the C-area pin in the left-channel first sound source chip AA 309;

(3) In the left channel switch circuit, the positive pin of the output end of a second optical coupler AA306 in an optical coupler group and the positive pin of the output end of a second optical coupler AA306 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with corresponding pins in the B area pin in a left channel first sound source chip AA 309; a negative pin of an output end of the second optical coupler AA306 and a negative pin of an output end of the second optical coupler AA306 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with a corresponding pin in a C area pin in a left sound channel first sound source chip AA 309;

(4) In the left channel switch circuit, the positive pin of the output end of a third optical coupler AA307 in an optical coupler group and the positive pin of the output end of a third optical coupler AA307 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with corresponding pins in the A area pins of a left channel second sound source chip AA 310; a negative pin of an output end of the third optical coupler AA307 and a negative pin of an output end of a third optical coupler AA307 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with a corresponding pin in a C-area pin in the left-channel second sound source chip AA 310;

(5) In the left channel switch circuit, a positive electrode pin of an output end of a fourth optical coupler AA308 in an optical coupler group and a positive electrode pin of an output end of a fourth optical coupler AA308 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then connected with a corresponding pin in a B area pin in a left channel second sound source chip AA 310; a negative pin of an output end of the fourth optical coupler AA308 and a negative pin of an output end of a fourth optical coupler AA308 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with a corresponding pin in a C-area pin in a left-channel second sound source chip AA 310;

(6) In the right channel switch circuit, the positive pin of the output end of the first optical coupler AA311 in the optical coupler group and the positive pin of the output end of the first optical coupler AA311 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins in the A area pin in the right channel first sound source chip AA 315; the negative pin of the output end of the first optical coupler AA311 and the negative pin of the output end of the first optical coupler AA311 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument and then are connected with corresponding pins in the C area pin in the right channel first sound source chip AA 315;

(7) In the right channel switch circuit, the positive pin of the output end of the second optical coupler AA312 in the optical coupler group and the positive pin of the output end of the second optical coupler AA312 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins in the B area pin in the right channel first sound source chip AA 315; the negative pin of the output end of the second optical coupler AA305 and the negative pin of the output end of the second optical coupler AA206 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument and then are connected with the corresponding pin in the C area pin in the right channel first sound source chip AA 315;

(8) In the right channel switch circuit, the positive pin of the output end of a third optocoupler AA313 in the optocoupler group and the positive pin of the output end of a third optocoupler AA313 in other optocoupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument and then connected with a corresponding pin in a region A pin in a right channel second sound source chip AA 316; a negative pin of an output end of the third optical coupler AA313 and a negative pin of an output end of the third optical coupler AA313 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of a traditional electronic keyboard instrument and then are connected with corresponding pins in a C area pin in a right channel second sound source chip AA 316;

(9) In the right channel switch circuit, the positive pin of the output end of the fourth optical coupler AA314 in the optical coupler group and the positive pin of the output end of the fourth optical coupler AA314 in other optical coupler groups are subjected to matrix synthesis through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins in the B area pin in the right channel second sound source chip AA 316; a negative pin at the output end of the fourth optical coupler AA314 and a negative pin at the output end of the fourth optical coupler AA314 in other optical coupler groups are subjected to matrix synthesis through a matrix key rule of the traditional electronic keyboard instrument and then are connected with a corresponding pin in a C area pin in a right channel second sound source chip AA 316;

(10) In the double tone and triple tone structure, in each switch circuit, the quantity of the parallel optocouplers in the optocoupler group corresponding to each key is different, the double tone needs to be connected with the optocouplers in twice quantity in parallel, the triple tone needs to be connected with the optocouplers in three times quantity in parallel, the quantity of the optocouplers in different optocoupler groups according to the force button induction point quantity is also different, the optocouplers in the double force induction optocoupler group correspond to two carbon film contacts, and the optocouplers in the triple force induction optocoupler group correspond to three carbon film contacts.

FIG. 10 is a schematic diagram showing connection of different pins of the optocoupler and the audio chip in the optocoupler set in the old AB combined switch circuit, the old CC combined switch circuit, and the old BB combined switch circuit

In the figure, 1 is a photocoupler corresponding to an a-block carbon film contact. And 2 is a photo-coupler corresponding to the C-block carbon film contact. And 3 is a photo-coupler corresponding to the B-block carbon film contact. And 4, an audio source chip. The number 5 is the pin of the area A of the sound source chip, the number 6 is the pin of the area C of the sound source chip, and the number 7 is the pin of the area B of the sound source chip.

FIG. 11 is a schematic diagram showing the connection of the optical coupler group and the different pins of the audio chip in the new AB combination switch circuit, the new CC combination switch circuit, the new BB combination switch circuit, and the new AA combination switch circuit

In the figure, 1 is a light coupler corresponding to the carbon film contacts of the A-block and the C-block. And 2 is an optical coupler corresponding to the carbon film contacts of the B region and the C region. And 3, an audio source chip. The number 4 is the pin of the A area of the sound source chip, the number 5 is the pin of the C area of the sound source chip, and the number 6 is the pin of the B area of the sound source chip.

FIG. 12 is a schematic view showing the connection between the carbon film contacts under the keys of the conventional electronic keyboard instrument and the corresponding pins of the sound source chip

Fig. 1 shows a general keyboard of a conventional electronic keyboard instrument. 2 is a carbon film contact under a key of a conventional electronic keyboard instrument. And 3, an audio source chip of the traditional electronic keyboard instrument. 4 is an a-region carbon film contact under the key. And 5 is a C-region carbon film contact under the key. And 6 is a B-block carbon film contact under the key. And 7 is a pin of the A area of the sound source chip. And 8 is a C-area pin of the audio source chip. And 9 is a B-area pin of the sound source chip.

Fig. 10 and 11 are explanatory views of a sentence "the output end of the optical coupler in the optical coupler group is connected to the pin corresponding to the relevant audio source chip" in the entire specification. Fig. 12 is an explanation of the description of the prior art in the background art.

Fig. 10 is also an explanation of the connection relationship between the pin of the sound source chip and the optical coupling output terminal in the drawings of the old AB combination switch circuit of fig. 2, the old CC combination switch circuit of fig. 4, and the old BB combination switch circuit of fig. 6.

Fig. 11 is also an explanation of the connection relationship between the pins of the sound source chip and the output ends of the opto-couplers in the drawings, such as the new AB combination switch circuit in fig. 1, the new CC combination switch circuit in fig. 3, the new BB combination switch circuit in fig. 5, the AA combination partition fixed switch circuit in fig. 7, the AA combination partition adjustable switch circuit in fig. 8, and the tone color superimposition stereo in fig. 9.

For the sake of simplicity and convenience of description, the description of words such as left and right channels is fixed, and in practical applications, the names of the left and right channels may be converted, and certainly, the corresponding circuit connection relationship needs to be converted accordingly.

All the technical schemes and embodiments adopted for solving the technical problems are also applicable to the electronic keyboard musical instrument with the three-force sensing key structure.

An electronic keyboard musical instrument includes a switch circuit board disposed between a carbon film contact and a sound source chip under keys and/or keys. The switch circuit board comprises a new AB combination switch circuit board, an old AB combination switch circuit board, a new CC combination switch circuit board, an old CC combination switch circuit board, a new BB combination switch circuit board, an old BB combination switch circuit board, an AA combination partition fixed switch circuit board and an AA combination partition adjustable switch circuit board.

The same and similar parts among the various embodiments in the present specification are referred to each other, and each embodiment focuses on differences from other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement without inventive effort.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the above description of the disclosed embodiments, the features described in the embodiments in this specification may be replaced or combined with each other to enable those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides an electronic keyboard musical instrument, includes carbon film contact and the sound source chip on the mainboard of traditional electronic keyboard musical instrument below key and the key, characterized by:

the keys are conductor keys;

the switch circuit is connected with the lead output end on the conductor glove through a control line;

the finger wire on the conductor glove controls the corresponding switch circuit through the key of the conductor, and further controls the corresponding pin of the sound source chip related to the switch circuit.

2. The electronic keyboard musical instrument according to claim 1, wherein:

the switching circuit includes a left channel switching circuit and a right channel switching circuit, and both the left channel switching circuit and the right channel switching circuit include: the key-pressing device comprises an independent direct current power supply and optocoupler groups with the same number as keys;

each optocoupler group in the right sound channel switch circuit is controlled by a first optocoupler normally-closed solid-state relay and a second optocoupler normally-closed solid-state relay, and the first optocoupler normally-closed solid-state relay and the second optocoupler normally-closed solid-state relay are controlled by the left sound channel switch circuit;

when the left sound channel switch circuit works, the optical coupler group in the left sound channel switch circuit can be started, and the optical coupler group in the right sound channel switch circuit corresponding to the same key is closed.

3. The electronic keyboard musical instrument according to claim 2, wherein:

in the left sound channel switch circuit, the optocoupler set is arranged between a positive lead of the direct current power supply and a relatively independent A-area carbon film contact and a B-area carbon film contact below the conductor key, and a negative lead of the direct current power supply is connected with a lead output end on the left sound channel conductor glove; the C-area carbon film contact is connected with the corresponding conductor key;

4. The electronic keyboard musical instrument according to claim 3, wherein:

in the right sound channel switch circuit, the input ends of the first optical coupler normally closed solid-state relay and the second optical coupler normally closed solid-state relay are connected with the positive electrode of the direct-current power supply in the left sound channel switch circuit through leads, and the input ends of the first optical coupler normally closed solid-state relay and the second optical coupler normally closed solid-state relay are connected with the corresponding conductor keys through C-area carbon film contacts.

5. The electronic keyboard musical instrument according to claim 2, wherein:

in the left sound channel switch circuit, the optocoupler set is arranged between the positive lead of the direct current power supply and the conductor keys, and the negative lead of the direct current power supply is connected with the lead output end on the left sound channel conductor glove;

in the right sound channel switch circuit, a positive lead of the direct-current power supply is connected with the positive pole of the input end of each optocoupler in the optocoupler group after passing through the positive pole and the negative pole of the output end of the second optocoupler normally-closed solid-state relay corresponding to each key; and the negative electrode of the input end of each optocoupler in the optocoupler set is connected with the negative electrode wire of the direct-current power supply after passing through the positive and negative electrode pins of the output end of the first optocoupler normally-closed solid-state relay.

6. The electronic keyboard instrument according to claim 5, wherein:

in the right sound channel switch circuit, the input anodes of the first optical coupler normally closed solid-state relay and the second optical coupler normally closed solid-state relay are connected with the positive lead of the direct-current power supply in the left sound channel switch circuit, and the input cathodes of the first optical coupler normally closed solid-state relay and the second optical coupler normally closed solid-state relay are directly connected with the corresponding conductor keys.

7. The electronic keyboard musical instrument according to claim 1, wherein:

in a two-channel or multi-channel switching circuit, each of said switching circuits comprises: the single chip microcomputer circuit and the optical coupler groups with the same number as the keys are arranged;

between two or more than two single chip microcomputer circuits, the pins and the wires of the input ends at the same position are combined together and connected with the corresponding conductor keys;

in each single chip microcomputer circuit, the optical coupler group is arranged between the relatively independent output end and a VCC conducting wire;

and a high-low level control line is led out from each singlechip circuit and is connected with the output end of a lead on the corresponding conductor glove.

8. The electronic keyboard instrument according to claim 7, wherein:

in each single chip microcomputer circuit, each optical coupler group is controlled by one driving optical coupler; the positive electrode of the input end and the positive electrode of the output end of the driving optocoupler are both connected with the VCC conducting wire, the negative electrode of the input end of the driving optocoupler is connected with the output end of the corresponding single chip microcomputer circuit, and the optocoupler group is arranged between the negative electrode of the output end of the driving optocoupler and the carbon film contacts of the area A and the area B below the corresponding conductor key;

and each C-area carbon film contact below the conductor key is connected with the corresponding output end of each single chip microcomputer circuit through a lead, and a directional diode is arranged between each C-area carbon film contact and the corresponding output end of each single chip microcomputer circuit.

9. The electronic keyboard instrument according to claim 7, wherein:

in each single chip microcomputer circuit, the VCC conducting wire is connected with the positive electrode of the input end of each optocoupler in the optocoupler group corresponding to all the conductor keys, and the negative electrode of the input end of each optocoupler in the optocoupler group is connected with the output end corresponding to the single chip microcomputer circuit.

10. The electronic keyboard instrument according to claim 1, wherein:

the switching circuit includes: a left channel switch circuit and a right channel switch circuit;

the left channel switch circuit and the right channel switch circuit each include: the key-pressing device comprises an independent direct current power supply and optocoupler groups with the same number as keys;

the current directions of the left channel switch circuit and the right channel switch circuit are opposite.

11. The electronic keyboard instrument according to claim 10, wherein:

the left sound channel switch circuit is provided with the optocoupler set between a positive lead of a direct current power supply and a carbon film contact of an area A and an area B below each conductor key, and a negative lead of the direct current power supply is connected with a lead output end on the left sound channel conductor glove;

the right sound channel switch circuit is provided with the optocoupler set between a negative lead of another direct current power supply and the carbon film contacts in the area A and the area B below each conductor key, and a positive lead of the direct current power supply is connected with the lead output end on the right sound channel conductor glove;

and the C-area carbon film contact is connected with the corresponding conductor key.

12. The electronic keyboard instrument according to claim 10, wherein:

the left sound channel switch circuit is provided with the optocoupler set between a positive lead of a direct current power supply and each conductor key, and a negative lead of the direct current power supply is connected with a lead output end on the left sound channel conductor glove;

the right sound channel switch circuit is provided with the optocoupler set between a negative lead of another direct current power supply and each conductor key, and a positive lead of the direct current power supply is connected with a lead output end on the right sound channel conductor glove.

13. An electronic keyboard musical instrument comprises keys, carbon film contacts below the keys and a sound source chip on a mainboard of a traditional electronic keyboard musical instrument, and is characterized in that:

all the keys are divided into a left keyboard and a right keyboard, and a left sound channel switch circuit is arranged between a carbon film contact below the keys in the left keyboard area and a left sound channel sound source chip; a right sound channel switch circuit is arranged between the carbon film contact below the keys of the right keyboard area and the right sound channel source chip;

the left channel switch circuit and the right channel switch circuit include: a common direct current power supply and optical coupler groups with the same number of keys corresponding to the subareas.

14. The electronic keyboard instrument according to claim 13, wherein:

in the right sound channel switch circuit, a right sound channel optical coupler group is arranged between a positive electrode lead of the direct current power supply and the carbon film contacts of the relatively independent A area and the B area below each key of the right keyboard area.

15. An electronic keyboard musical instrument comprises keys, carbon film contacts below the keys and a sound source chip on a mainboard of a traditional electronic keyboard musical instrument, and is characterized in that:

the carbon film contacts of the area A and the area B are relatively independent, and all the carbon film contacts of the area C below the keyboard are combined together and connected with a negative lead of a direct current power supply;

the switching circuit comprises a left sound channel switching circuit and a right sound channel switching circuit; the left channel switch circuit and the right channel switch circuit include: a common direct current power supply, and optical coupler groups with the same number as the keys.

16. The electronic keyboard instrument of claim 15, wherein:

in the two-channel switch circuit, in each optical coupler group of each switch circuit, two or more optical couplers corresponding to carbon film contacts of an area A and an area B below a keyboard are arranged, and the optical couplers control corresponding pins in two or more sound source chips respectively, so that the tone color superposition stereo of the electronic keyboard musical instrument can be realized.

17. The electronic keyboard instrument of claim 15, wherein:

in the left sound channel switch circuit, a left sound channel optical coupler group is arranged between a positive lead of the direct current power supply and carbon film contacts of an area A and an area B below corresponding keys after a positive lead and a negative lead of an output end of an optical coupler normally-closed solid-state relay corresponding to each key pass through;

in the right sound channel switch circuit, after an anode lead of the direct current power supply passes through an anode and a cathode of an output end of a common optical coupler corresponding to each key, a right sound channel optical coupler group is arranged between the anode lead and carbon film contacts of an area A and an area B below the corresponding key.

18. The electronic keyboard instrument of claim 17, wherein:

the normally closed solid relay of the optical coupler in the left sound channel switch circuit and the common input end anode of the optical coupler in the right sound channel switch circuit under the same key are connected with the anode lead of the direct current power supply;

the optocoupler normally-closed solid-state relay in the left sound channel switch circuit and the common optocoupler input end cathode in the right sound channel switch circuit below the same key are connected together through a controllable switch and a cathode lead of the direct current power supply;

19. The electronic keyboard instrument according to any one of claims 3, 8 and 11, wherein:

in the left and right channels or multi-channel switching circuits, each optical coupler group in each switching circuit comprises a first optical coupler corresponding to a carbon film contact in the area A below the keyboard and a second optical coupler corresponding to a carbon film contact in the area B below the keyboard;

in each switch circuit, the positive and negative pins of the output end of each optical coupler in the optical coupler group are respectively subjected to matrix synthesis with the same output end pins of other optical couplers in the same circuit at the same position through the matrix key rule of the traditional electronic keyboard instrument, and then are connected with the corresponding pins of the sound source chip.

20. The electronic keyboard instrument according to any one of claims 5, 9 and 12, wherein:

in the two-channel or multi-channel switch circuit, one pin of the output end of each optical coupler in the optical coupler group is connected with a corresponding carbon film contact end lead, and the other pin of the output end of each optical coupler in the optical coupler group is subjected to matrix synthesis with the same pin of the optical couplers at the same position in other optical coupler groups of the same circuit through the matrix key rule of a traditional electronic keyboard instrument and then is connected with the corresponding pin of the related sound source chip.

21. The electronic keyboard instrument according to any one of claims 3, 8 and 11, wherein:

in the two-channel or multi-channel switch circuit, two or more than two optical couplers corresponding to carbon film contacts in the area A and the area B below the keyboard are arranged in each optical coupler group of each switch circuit, and the optical couplers control corresponding pins in two or more than two related sound source chips respectively, so that the tone color superposition stereo of the electronic keyboard musical instrument can be realized.

22. An electronic keyboard musical instrument, characterized in that:

includes a switch circuit board arranged between the carbon film contacts and the sound source chip under the keys and/or keys.