CN215600071U - Electronic accordion - Google Patents

Abstract

The utility model discloses an electronic accordion. The electronic accordion comprises a keyboard and a bass machine which are positioned on the right and left sides of a player, the keyboard and the bass machine are connected into a whole through a closed air box, and a decorative cover is arranged between the keyboard and the air box. The Bass machine comprises a conductive silica gel button, a Bass button acquisition circuit and a Bass button. The keyboard comprises conductive elastic buttons, a key acquisition circuit and keys. The key acquisition circuit is connected with the sound source circuit, and the bass button acquisition circuit is connected with the sound source circuit through main control circuit, and main control circuit, the wind pressure sensor of locating in the bellows, sound source circuit are connected with the volume control circuit, and the volume control circuit is connected with the speaker through power amplifier circuit. The utility model has simple structure, light weight, convenient carrying, small sound production delay, high playing sensitivity and good playing feeling, and is suitable for popularization and promotion.

Description

Electronic accordion

Technical Field

The utility model relates to an electronic accordion, and belongs to the technical field of accordion.

Background

The accordion is a traditional musical instrument throughout the world, is deeply favored by music enthusiasts due to the characteristics of portability, beautiful tone and distinct musical sense, along with the improvement of electronic technology, electronic devices are gradually introduced into the accordion to form the electronic accordion, the electronic accordion is gradually appeared in the visual field of people, and the electronic accordion can almost meet the playing requirements of all musical instruments, such as a piano, a violin, a wind instrument and the like, but a small number of electronic accordion products appearing on the market at present are developed abroad. In China, the electronic accordion is still in a blank state.

For the existing foreign electronic accordion, the following disadvantages exist in the aspects of practical playing and the like:

1. the price is high, usually 4-9 million yuan RMB, the structure is complex, the operation is complicated, the device can be mastered by professional guidance, and the device is not suitable for common accordion learners and enthusiasts.

2. In addition to the fact that the manufacturing cost of the foreign electronic accordion is too high due to the complex structures of the right-hand keyboard and the left-hand bass machine, the foreign electronic accordion also has the advantages that the weight of the accordion is heavy (the whole accordion is close to 12 kilograms), the foreign electronic accordion is not different from the common accordion, the playing and sounding of the keyboard and the bass machine have large delay (about 17 milliseconds to 25 milliseconds), the playing sensitivity is poor, and the playing feeling is poor.

3. For the electronic accordion of the external power adapter, the external sound box and the like which appear abroad, the price is still expensive, which is usually ten times of that of the traditional accordion, and the electronic accordion is inconvenient to carry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an electronic accordion which is simple in structure, light in weight, convenient to carry, small in sounding delay, high in playing sensitivity, good in playing feeling and suitable for popularization and promotion.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an electronic accordion, is including the bass machine that is located the keyboard and the left hand side of player's right hand side respectively, links into an organic whole through airtight bellows between keyboard and the bass machine, still is equipped with between keyboard and the bellows and decorates lid, its characterized in that: the bass machine comprises a bass button, and a player presses the bass button to enable the bass button to directly touch a conductive silica gel button to be in contact with a contact on a bass button acquisition circuit so as to generate bass button position information for sounding; the keyboard comprises keys, and a player directly touches the conductive elastic buttons to contact with contacts on the key acquisition circuit by pressing the keys so as to generate key position information for sounding; the keyboard is a piano keyboard or a Bayan keyboard; the position information output port of the key acquisition circuit is connected with the information input port of the sound source circuit, the position information output port of the bass button acquisition circuit is connected with the information input port of the sound source circuit through the main control circuit, the control port of the main control circuit, the wind pressure signal output port of the wind pressure sensor arranged in the air box and the audio signal output port of the sound source circuit are respectively connected with the corresponding input ports of the volume adjusting circuit, and the audio output port of the volume adjusting circuit is connected with the input port of the loudspeaker through the power amplifying circuit.

The utility model has the advantages that:

1. the bass machine is designed in such a way that a bass button pressed by a player directly touches a conductive silica gel button to touch a conductive sounding, and the keyboard is also designed in such a way that keys pressed by the player directly touch a conductive elastic button to touch the conductive sounding, so that the structure of the whole electronic accordion becomes simple and is not complex any more, the production and manufacturing difficulty and cost are reduced, the whole weight of the electronic accordion is reduced by nearly 20% compared with the existing foreign electronic accordion, and the weight of the electronic accordion is about 9.6 kg under the condition of comprising a built-in loudspeaker and a power supply (24V endurance for 8 hours).

2. In the utility model, the audio (analog quantity) sent by the sound source circuit does not pass through the main control circuit any more, but is amplified and output by the power amplifying circuit directly through the volume adjusting circuit based on the amplifying multiple instruction corresponding to the air pressure value in the air bellow detected by the wind pressure sensor, so that the audio is prevented from excessive operation processing such as analog-to-digital conversion and the like in the transmission process, the playing response speed is greatly improved, and in addition, the structural design that the response speed of the keyboard and the Bass machine to the finger pressing pronunciation is increased, the delay from playing to sounding is greatly shortened to 3-7 milliseconds, and the playing experience is greatly improved.

3. The touch display screen is designed, so that the touch display screen is convenient and comfortable to operate and control, flexible in function selection and capable of being mastered without guidance of professionals.

4. The sound source circuit of the utility model can record and store the original sounds of more than one hundred musical instruments (including folk music elements embedded with Chinese characteristics), meets the international MIDI standard and is compatible with the digital sound source of the electrical music instrument.

5. The electronic accordion of the utility model has wireless functions of Bluetooth and the like, can download background music through a mobile phone, and has strong flexibility and practicability.

6. The electronic accordion integrates the loudspeaker and the power supply, so that the practicability and the portability are improved, and the portability is greatly improved.

Drawings

Fig. 1 is an overall schematic view of the electronic accordion of the present invention (touch display screen, colored lights, etc. are not shown).

Fig. 2 is a block diagram of the electronic accordion of the present invention.

Fig. 3 is a schematic diagram of the electronic accordion according to the preferred embodiment of the present invention.

Fig. 4 is a schematic diagram of a bayes machine.

Fig. 5 is an enlarged sectional view taken along line a-a of fig. 4.

Fig. 6 is a schematic diagram of a key button of a prior art bass machine.

Detailed Description

As shown in fig. 1 and fig. 2, the electronic accordion of the present invention includes a keyboard 630 and a bass machine 620 respectively located on the right hand side and the left hand side of a player, the keyboard 630 and the bass machine 620 are connected into a whole by a sealed bellows 100, and a decoration cover 200 is further provided between the keyboard 630 and the bellows 100, wherein: the bass machine 620 includes a bass button 30 for generating position information of the bass button by directly making and breaking the conductive silicone button 50 contact and separate from the contact point on the bass button acquisition circuit 621, in other words, the bass machine 620 includes the bass button 30, and the player presses the bass button 30 to make the bass button 30 directly touch the conductive silicone button 50 to make contact with the contact point on the bass button acquisition circuit 621, so as to generate the position information of the bass button for generating voice; similarly, the keyboard 630 includes keys (black keys, white keys) that generate key position information directly by the contact and separation actions of the conductive elastic buttons with the contacts on the key collection circuit 631, in other words, the keyboard 630 includes keys that are contacted by the player by pressing the keys so that the keys directly touch the conductive elastic buttons to generate key position information for sound production; the keyboard 630 is a piano keyboard or a bayonette keyboard; the key collecting circuit 631 sends key position information to the sound source circuit 640, the bass button collecting circuit 621 sends bass button position information to the sound source circuit 640 through the main control circuit 610, the wind pressure sensor 660 arranged in the wind box 100 and the sound source circuit 640 respectively send a volume amplification proportion instruction, air pressure in the wind box 100 and audio called from the sound source memory to the volume adjusting circuit 650, the volume adjusting circuit 650 outputs the audio with the adjusted volume to the power amplifying circuit 670, so that the power amplifying circuit 670 amplifies the audio and then broadcasts the amplified audio from the loudspeaker 680, that is, as shown in fig. 2, the position information output port of the bass button collecting circuit 631 is connected with the information input port of the sound source circuit 640, the position information output port of the bass button collecting circuit 621 is connected with the information input port of the sound source circuit 640 through the main control circuit 610, a control port of the main control circuit 610, a wind pressure signal output port of the wind pressure sensor 660 provided in the bellows 100, and an audio signal output port of the sound source circuit 640 are connected to corresponding input ports of the volume adjustment circuit 650, respectively, and an audio output port of the volume adjustment circuit 650 is connected to an input port of the speaker 680 via the power amplifier circuit 670.

As shown in fig. 1 and 2, a bass sound changer 622 is disposed on the inner side of the bass machine 620, a keyboard sound changer 632 is disposed on the inner side of the keyboard 630, and signal output ports of the bass sound changer 622 and the keyboard sound changer 632 are respectively connected to corresponding signal ports of the main control circuit 610.

In the actual design, a touch display screen 690 is installed on the keyboard 630, the touch display screen 690 is arranged towards a player, a signal port of the touch display screen 690 is connected with a corresponding signal port of the main control circuit 610, the keyboard 630 and the bass machine 620 can respectively play different musical instrument sounds (for example, the right-handed melody is a violin sound, the left-handed accompaniment is an organ sound) through the touch display screen, and the volume of the output sound when the keyboard 630 and the bass machine 620 are played can be set through the touch display screen.

Further, the player can set the volume magnification ratio between the pull and push bellows 100 and the output sound of the keyboard 630 and the bass machine 620 (the volume magnification ratio of the keyboard 630 and the bass machine 620 being identical) by selecting a bellows pressure versus volume magnification curve (described in detail below) on the touch display 690.

Further, the player can also set the volume of the sound outputted from the keyboard 630 and the bass machine 620 via the sound source circuit 640 (or the audio processor 641 described below) independently by setting the sound source circuit 640 (or the audio processor 641 described below) on the touch display 690 to correspond to the respective volume amplification factors outputted from the keyboard 630 and the bass machine 620 (i.e., the respective volume amplification factors of the bass button sounds and the key sounds), wherein the volume of the sound can be set to be dynamically variable or constant.

Referring to fig. 1, a color lamp 691 may be embedded in the decoration cover 200, and a signal port of the color lamp 691 is connected with a corresponding signal port of the main control circuit 610.

In actual design, the main control circuit 610, the sound source circuit 640, the sound volume adjusting circuit 650, the power amplifying circuit 670, and the speaker 680 are preferably provided in the decorative cover 200. Of course, the circuits and devices may be disposed in the bass machine 620, or some may be disposed in the decorative cover 200 beside the keyboard 630 and some may be disposed in the bass machine 620, without limitation. In practice, the speaker 680 should be disposed opposite to the sound outlet hole of the trim cover 200.

Referring to fig. 1, a battery compartment is installed in the keyboard 630, a power supply 700 is installed in the battery compartment, and the power supply 700 supplies power to various circuits and devices through a power distribution circuit 710.

In addition, wireless transmission equipment such as bluetooth can be arranged in the decorative cover 200, and a signal port of the wireless transmission equipment is connected with a corresponding signal port of the main control circuit 610.

As shown in fig. 4 and 5, the bass machine 620 of the present invention includes a plurality of bass buttons 30, the bass buttons 30 are installed in and exposed from a closed space such as a rectangular body formed by the bass panel 10, the support holder 60, and the circuit board 20, the bass panel 10 has an inverted U shape as a top plate and two opposite side plates, the circuit board 20 as a bottom plate, a portion of the support holder 60 as the other two opposite side plates to form a housing accommodating the bass buttons 30, and the bass button capture circuit 621 is printed on the circuit board 20, wherein: the bass button 30 can penetrate through the button hole 11 of the bass panel 10 in a way of moving up and down, the top of the bass button 30 extends out of the bass panel 10 from the button hole 11 and is usually exposed by 3 mm-6 mm, the bottom of the bass button 30 in the bass panel 10 is arranged on the top of a conductive silica gel button 50, and the conductive silica gel button 50 is kept in a relative position with the circuit board 20 and fixed under the positioning action of the positioning layer plate 40; under the depression of the bass button 30 by the player, the conductive silicone button 50 moves downward to contact with the corresponding contact of the bass button collecting circuit 621 on the circuit board 20 to generate a conducting electrical signal.

As shown in fig. 5, the bass button 30 includes a solid or hollow button cap 31, the top of the button cap 31 extends out of the button hole 11, a ring of cap edge 311 is provided at the bottom of the button cap 31, the cap edge 311 is limited by the bass panel 10 and is always located in the closed space, the bottom surface of the button cap 31 is in contact with the top surface of the conductive silicone button 50 but is not fixed by bonding or the like, and the bass button 30 can make extension and retraction movements relative to the button hole 11 of the bass panel 10 under the guiding action generated by the button hole 11 and the elastic force of the conductive silicone button 50.

Further, a felt pad (not shown in the figure) is arranged on one surface, facing the bass panel 10, of the cap edge 311 of the button cap 31, and the design of the felt pad can effectively reduce mechanical collision sound in the playing process, greatly reduce noise and improve playing touch feeling.

As shown in fig. 5, the conductive silicone button 50 includes an elastic main body 51 in the shape of an inverted bowl, a circle of convex edge 511 is disposed outwards at the bottom of the elastic main body 51, a silicone button groove connection seat 52 is disposed upwards at the outer top of the elastic main body 51, a convex block 54 is disposed downwards at the inner top of the elastic main body 51, a conductive silicone rubber sheet 53 is disposed on the bottom surface of the convex block 54, the conductive silicone rubber sheet 53 is vertically opposite to a corresponding contact on the bass button collection circuit 621, wherein: the conductive silicone button 50 moves downward by the depression of the bass button 30 to bring the conductive silicone rubber sheet 53 into contact with the contacts.

Furthermore, the lower portion of the elastic body 51 of the conductive silicone button 50 is inserted into the positioning hole 41 of the positioning layer plate 40, and the convex edge 511 of the elastic body 51 is buckled at the bottom of the positioning hole 41 and faces the outer circumference of the annular groove 410, so that the convex edge 511 of the elastic body 51 is pressed by the positioning layer plate 40, and the conductive silicone button 50 is fixed on the circuit board 20, wherein the convex edge 511 of the conductive silicone button 50 is not connected with the circuit board 20 in a bonding manner or the like, and only the positioning layer plate 40 and the circuit board 20 are fixed with each other through bolts.

Furthermore, as shown in fig. 4, the bottom surface of the button cap 31 is provided with an anti-moving block 32 protruding downward, and the anti-moving block 32 is disposed in the groove of the silicone button groove connecting seat 52. The movement prevention block 32 functions to prevent the bass button 30 from being excessively displaced with respect to the conductive silicone button 50 during the up-and-down movement, thereby ensuring that the respective movements of the bass button 30 and the conductive silicone button 50 and the movement therebetween can be well maintained in the up-and-down direction.

As shown in fig. 5, for the conductive silicone button 50, the cross-sectional area of the bottom of the cylindrical silicone button slot connecting seat 52 should be slightly smaller than the top surface area of the elastic body 51. In addition, the cross-sectional area of the solid protrusion 54 should be smaller than the cross-sectional area of the through hole of the silicone button groove connection seat 52, so that the protrusion 54 can be retracted into the silicone button groove connection seat 52 by designing the portion of the top surface of the elastic body 51 between the silicone button groove connection seat 52 and the protrusion 54 to have a suitable thickness (thinness). In practical design, the thickness of the side wall and the top surface of the elastic body 51 between the silicone button and the connecting seat 52 and the protrusion 54 is designed to be concave and curved.

In the present invention, the conductive silicone button 50 is characterized in that the conductive silicone button 50 is pressed to deform and then touches the corresponding contact on the circuit board 20 to conduct the corresponding circuit on the circuit board 20, and the conductive silicone button 50 can be continuously pressed to deform, so as to fully satisfy the playing hand feeling requirement, and the two pressed processes are distinct in level and respectively meet the playing force comfort requirement. Specifically, the downward movement of the conductive silicone button 50 by the depression of the bass button 30 is divided into two phases:

in the first stage, at the beginning of playing, a player presses down the button cap 31 with about 65 grams of pressure (the mass of the button cap is less than 1 gram, and the action of the button cap in the lower pressure is ignored), the silicone button groove connecting seat 52 and the projection 54 move downwards together, the side wall of the elastic body 51 is recessed inwards, the conductive silicone rubber sheet 53 on the projection 54 is contacted with the contact of the circuit board 20, the compression generated on the conductive silicone button 50 in this stage is realized by the elasticity of the elastic body 51, and the purpose that the player can realize the connection of the circuit board 20 in the shortest possible time by using smaller pressing force is achieved in this stage;

in the second stage, the player continues to press the button cap 31 downwards due to inertia, the silicone button groove connecting seat 52 continues to move downwards, the bump 54 is not moved at this time, the top of the elastic body 51 begins to be sunken downwards, the side wall continues to be sunken inwards, so that the bump 54 is retracted into the silicone button groove connecting seat 52, the compression on the conductive silicone button 50 in this stage is realized by the elasticity of the elastic body 51 and the retraction of the bump 54 into the silicone button groove connecting seat 52, the player linearly increases the pressing force of the button cap 31 downwards from about 110 g to about 250 g at this time, and the compression displacement in this stage brings clear, comfortable and free playing hand feeling to the player.

In practical design, it is preferable that the pressing stroke of the silicone button slot connecting seat 52 and the protrusion 54 for generating the conduction electrical signal in the first stage is 0.5mm to 1.0mm, and the pressing stroke of the silicone button slot connecting seat 52 in the second stage is 2mm to 5 mm.

After the first and second stages, the conductive silicone button 50 generates a resilient force by its own elastic deformation characteristic, so that it and the bass button 30 are reset.

Based on the above design of the conductive silicone button 50, the bass button 30 has a clear touch, and is slightly kneaded compared with the traditional accordion, so that the playing feeling is good.

As shown in fig. 4 and 5, the fitting hole 120 is provided in the fitting portion 12 extending downward from one side of the bass panel 10, and the fitting portion 12 is used to integrally mount the bass machine 620 to the electronic accordion of the present invention.

In the present invention, the bass panel 10 functions as: first, the components of the circuit board 20 are integrated into a single body, the bass machine 620. Second, the bass machine 620 is fixed to the electronic accordion of the present invention by passing a screw through the fitting hole 120. Thirdly, besides being used for arranging and positioning the bass buttons 30, the bass buttons 30 are provided with a guiding function of pressing to and fro, the thickness of the bass panel 10 is reasonably designed according to the height of the button caps 31, and the gap between the cylindrical surfaces of the bass buttons 30 and the hole walls of the button holes 11 is preferably kept at 0.3mm, so that the button caps 31 are ensured not to topple and clamp while the guiding function is provided for the button caps 31.

In practical design, all the bass buttons 30 should be regularly arranged in a form of a plurality of rows × a plurality of columns according to the requirements of the electronic accordion, the number of the bass buttons of the electronic accordion with different specifications and models is different, and the bass panel 10 is designed reasonably according to the number of the bass buttons. For example, 120 button holes 11 are provided on the bass panel 10 of an electronic accordion in which 120 bass buttons are arranged, but it is also possible to arrange a children's organ of 96, 80, 60, 48, … … up to 8 bass buttons, and so on.

When the player presses a certain button cap 31 while playing the bass machine 620, the button cap 31 moves downward and abuts against the conductive silicone button 50, the downward force is transmitted to the conductive silicone button 50, and then the conductive silicone button 50 also moves downward. When the conductive silicone rubber sheet 53 on the conductive silicone button 50 contacts with the corresponding contact on the circuit board 20, the bass button collecting circuit 621 is triggered to generate a conducting electrical signal, that is, the position information of the pressed bass button of the button cap 31 is sent to the main control circuit 610. When the player releases the button cap 31, the button cap 31 moves upward by the resilient return of the conductive silicone button 50 until the cap edge 311 of the button cap 31 is stopped by the bass panel 10, and at this time, the conductive silicone rubber piece 53 of the conductive silicone button 50 is separated from the corresponding contact on the circuit board 20, and thus, transmission of the bass button position information of the button cap 31 to the main control circuit 610 is stopped.

Fig. 6 shows a key button structure of bass machine disclosed in chinese utility model having patent No. 201721366213.1 and utility model entitled "key button structure of electronic accordion bass machine", which includes a key button 90, the key button 90 being installed in an enclosed space formed by a key plate 81, a support fixing frame 82 and a circuit board 83 and exposed, wherein: the key button 90 includes a key cap 91, the top of the key cap 91 extends out from a keyhole of the key board 81, the bottom of the key cap 91 is connected with the top of a sleeve 92, a top rod 94 is installed at the bottom of the sleeve 92, a spring 93 is arranged between the part of the top rod 94 located in the sleeve 92 and the inner wall of the top of the key cap 91, the top rod 94 can extend out and retract relative to the sleeve 92 under the elastic force action of the spring 93, the bottom of the top rod 94 is connected with a conductive silica gel button 85, the conductive silica gel button 85 is installed on the circuit board 83 through a fixing plate 84, and the conductive silica gel button 85 moves downwards under the pressing action of the key button 90 pressed by a player to contact with the circuit board 83 to generate a conduction electrical signal.

Compared with the existing bass key button structure, the bass machine 620 provided by the utility model has the advantages that the spring, the sleeve and the ejector rod are removed, the conductive silica gel button replaces the spring with the self elastic resetting capability, the sleeve is replaced by the guiding function of the button hole of the bass panel, the structure is greatly simplified, and the following advantages are brought while the bass button is kept to be pressed stably and reliably:

firstly, the stroke from the button cap to the contact of the conductive silica gel button to the circuit board is greatly shortened, so that the response speed of pressing the pronouncing by the finger is increased, and the touch key sensitivity and the comfort feeling of the player are greatly improved.

Secondly, the friction surfaces among all parts are greatly reduced due to the simplified structure, the deviation caused by pressing the light and heavy feeling is eliminated, the touch feeling of a player to the bass button is clearer, and compared with the traditional accordion, the bass button is softer and more flexible, and the playing feeling is better.

Thirdly, the simplified structure improves the manufacturing efficiency and the yield, and by taking 120 bass buttons arranged on the accordion as an example, the assembly material cost and the assembly labor cost can be greatly reduced to about 160 yuan, so that the price of the accordion product is reduced, and the popular demand is met.

Fourthly, taking 120 bass buttons arranged on the accordion as an example, compared with the existing bass key button structure, the simplified structure enables the weight of the bass machine to be reduced by 550 grams and about 280 grams, which is a great progress for carrying a clasping type musical instrument, the weight of the accordion is really reduced, the load is really reduced for an accordion performer, and the popularization of the accordion to the young children is realized.

In the present invention, the keyboard 630 may be a keyboard disclosed in chinese utility model with patent No. 201721364262.1, a utility model entitled "an electronic accordion keyboard", which also has the advantages of fast pressing and sounding response speed, good playing feeling, high manufacturing efficiency, low cost, light weight, etc.

Of course, the keyboard 630 may be designed in other forms without limitation, as long as the keys (black keys and white keys) contact and separate with the contacts on the circuit board or the key collecting circuit 631 through the conductive elastic buttons (or conductive silicone buttons) to generate the key position information.

In the present invention, the bellows 100, the decoration cover 200, the bass speaker 622, the keyboard speaker 632, the wind pressure sensor 660, the speaker 680, and the power supply 700 are all components or devices known in the art.

In the present invention, the right-hand keyboard 630 and the left-hand bass machine 620 can play different musical instrument sounds respectively, for example, the right-hand melody is a violin sound, the left-hand accompaniment is an organ sound, and the volumes can be set independently by touching the display screen.

The number of bass inflators 622 is usually 6, the number of keyboard inflators 632 is usually 13, the bass machine 620 can rapidly switch between different instrument sounds through the bass inflators 622, similarly, the keyboard 630 can rapidly switch between different instrument sounds through the keyboard inflators 632, and the volume of the inflected sounds can be independently set through the touch display screen.

In addition, the electronic accordion of the present invention may further include a control button for adjusting a pulling/pressing feeling to a suitable state when the bellows 100 is pulled and pressed, and an exhaust button for exhausting air in the bellows 100 after the accordion is used up to close the bellows 100.

In the present invention:

the touch display screen 690 is mainly used for starting the electronic accordion, selecting the sound type of the left hand and the right hand, adjusting the volume, controlling the flickering mode of colored lamps and the like.

The key collection circuit 631 employs a matrix circuit, which is mainly used to collect and send out key position information corresponding to keys depressed by the right hand of a player.

The bass button acquisition circuit 621 includes a CPU and a matrix circuit, and is mainly used to acquire and send out position information of a bass button corresponding to a bass button pressed by the left hand of a player.

The main control circuit 610 includes a CPU, which is mainly used to recode the received position information of the bass button and send the recoded position information to the sound source circuit 640, receive the signals of the bass sound changer 622 and the keyboard sound changer 632 and send the signals to the sound source circuit 640, receive the volume amplification scale command sent by the player through the touch display 690, send the volume amplification scale command of the player to the volume adjusting circuit 650, and control the color lamp 691 to flash.

Here, since the number of the bass buttons of the bass machine 620 is large and the generated position information of the bass buttons is large, the method of recoding the position information of the bass buttons by the main control circuit 610 and then transmitting the recoded position information to the sound source circuit 640 can be distinguished from the method of directly transmitting the key position information to the sound source circuit 640, so that the processing amount of the sound source circuit 640 on excessive information is reduced, the sound source circuit 640 is prevented from processing excessive data at the same time and generating faults, and the normal operation of the circuit is ensured.

The volume up-scaling command for adjusting the volume level is a selected relationship between the amount of air pressure in the bellows and the volume up-scaling factor, which may be referred to as a bellows pressure versus volume up-scaling factor, and may be a linear or non-linear (e.g., exponential) curve.

As shown in fig. 3, the sound source circuit 640 preferably includes an audio processor 641 and a sound source memory 642 for storing sound source files of various musical instruments, the output port of the main control circuit 610 and the position information output port of the key capture circuit 631 are connected to the information input port of the audio processor 641, the data port of the audio processor 641 is connected to the data port of the sound source memory 642, and the analog audio signal output port of the audio processor 641 is connected to the analog audio input port of the volume adjustment circuit 650.

The audio processor 641 is mainly configured to retrieve corresponding bass button sounds from the sound source memory 642 according to the received bass button position information, convert the bass button sounds into analog audio volume, and send the analog audio volume, and retrieve corresponding key sounds from the sound source memory 642 according to the received key position information, convert the key sounds into analog audio volume, and send the analog audio volume. When the player presses the keyboard tone changer 632, the audio processor 641 is further configured to perform corresponding keyboard tone changing processing on the key tones called from the sound source memory 642 according to the playing keyboard 630 based on the keyboard tone changing information received by the main control circuit 610 and sent out the analog audio volume according to the keyboard tone changing information sent from the keyboard tone changer 632. When the player presses the bass shift 622, the audio processor 641 is further configured to output an analog audio volume by performing corresponding bass shift processing on the bass button sounds called from the sound source memory 642 by the playing bass machine 620, based on the bass shift information sent from the bass shift 622 received by the main control circuit 610.

The wind pressure sensor 660 is mainly used to detect or sense the air pressure in the wind box 100, and the detected pressure is used to control the volume of the audio output.

As shown in fig. 3, the sound volume adjusting circuit 650 preferably includes a CPU 651, an AD converter 652 and an audio amplifier 653, wherein a control port of the main control circuit 610 is connected to a corresponding signal port of the CPU 651, a wind pressure signal output port of the wind pressure sensor 660 is connected to a corresponding signal port of the CPU 651 via the AD converter 652, a command output port of the CPU 651 is connected to a command input port of the audio amplifier 653, and an analog audio input port and an analog audio output port of the audio amplifier 653 are connected to an audio signal output port of the sound source circuit 640 and an audio input port of the power amplifier circuit 670, respectively.

The AD converter 652 is mainly used to analog-to-digital convert the air pressure value in the air box 100 detected by the received wind pressure sensor 660 and send the converted value to the CPU 651. The CPU 651 is mainly used for issuing a volume amplification ratio command to the audio amplifier 653 according to a volume amplification ratio command issued by the player via the touch panel 690 and sent via the main control circuit 610, and for issuing an amplification factor command based on the air pressure value in the air box 100 detected by the wind pressure sensor 660. The audio amplifier 653 is mainly used to directly amplify the volume of the audio (analog audio volume: key tone, bass button tone, bass shift, keyboard shift) inputted from the audio source circuit 640 according to the received amplification factor command, and then transmit the amplified audio.

Here, the audio (analog quantity) sent from the audio processor 641 does not pass through the main control circuit 610, even the processing of the CPU 651, and based on the amplification factor instruction corresponding to the air pressure value in the bellows 100 detected by the wind pressure sensor 660, the audio amplifier 653 directly performs audio amplification to send the audio to the power amplifier circuit 670, and then further amplifies and outputs the audio.

The power amplifier circuit 670 is mainly used to amplify the audio sent by the volume adjusting circuit 650 and then play the audio through the speaker 680.

The power distribution circuit 710 is mainly used to distribute and supply voltage to circuits and devices using electricity.

In the present invention, the key collection circuit 631, the bass button collection circuit 621, the sound source circuit 640, the main control circuit 610, the volume adjustment circuit 650, the power amplification circuit 670, and the power distribution circuit 710 may all adopt circuits known in the art.

The sounding method of the electronic accordion comprises the following steps:

step 1: simultaneously carrying out the following steps 1-1) to 1-3):

1-1) the bass button collecting circuit 621 of the bass machine 620 collects the position information of the bass button corresponding to the bass button 30 pressed by the player in real time, sends the position information of the bass button to the main control circuit 610, the main control circuit 610 recodes the position information of the bass button and sends the recoded position information to the sound source circuit 640, so that the sound source circuit 640 calls a corresponding bass button sound from the sound source memory 642 according to the received recoded position information of the bass button and sends the corresponding bass button sound to the volume adjusting circuit 650;

1-2) the key collecting circuit 631 of the keyboard 630 collects in real time the key position information corresponding to the keys (black keys, white keys) pressed by the player and sends the key position information to the sound source circuit 640, so that the sound source circuit 640 calls corresponding key sounds from the sound source memory 642 according to the received key position information and sends the key sounds to the volume adjusting circuit 650;

1-3) the wind pressure sensor 660 detects the air pressure in the air box 100 in real time and sends the detected pressure value to the volume adjusting circuit 650;

step 2: the volume adjusting circuit 650 adjusts the volume of the key tone and the bass button tone sent from the sound source circuit 640 based on the pressure value in step 1 and sends the adjusted volume to the power amplifying circuit 670 according to the volume amplifying scale command sent by the player through the touch display screen 690 and sent through the main control circuit 610;

and step 3: the power amplifier 670 amplifies the audio signals from the volume adjusting circuit 650 and plays the amplified audio signals through the speaker 680 to generate sounds corresponding to the player playing the bass button 30 and/or the keys (black keys and white keys).

When the player presses the bass shift 622, the bass shift information corresponding to the bass shift 622 is transmitted to the sound source circuit 640 via the main control circuit 610, and the sound source circuit 640 performs corresponding bass shift processing on the bass button sound retrieved from the sound source memory 642 in accordance with the player's playing of the bass machine 620, and then transmits the processed bass shift information to the sound volume adjustment circuit 650;

when the player presses the keyboard tone changer 632, the keyboard tone changing information corresponding to the keyboard tone changer 632 is transmitted to the sound source circuit 640 via the main control circuit 610, so that the sound source circuit 640 performs corresponding keyboard tone changing processing on the key tones called from the sound source memory 642 according to the player playing the keyboard 630 and transmits the processed key tones to the volume adjusting circuit 650.

Based on the above sounding method, the player first starts the electronic accordion by touching the display screen 690, and sets the left and right hand sound type, volume amplification ratio, color lights, etc. based on the touch display screen 690, the left-hand bass machine 620 (and spin), the right-hand keyboard 630 (melody), and the proper operation of the bass and keyboard inflators 622, 632 (by rapidly switching between different instrument sounds via the inflators) can then be initiated, while the player is playing, the player pulls and pushes the bellows 100 by an external force to change the air pressure in the bellows 100, further, the electronic accordion of the present invention generates key sound and bass button sound for playing through the variation of the pressure of the bellows 100 and the volume amplification ratio set by the player, and bass and keyboard inflexion, and is finally emitted from the speaker 680 after volume adjustment.

The blinking of the colored lights 691 may be set by touching the display screen 690 so that the main control circuit 610 controls the blinking of the colored lights 691 in due course according to the setting of the colored lights.

When the sound source file required by the player does not exist in the sound source memory 642 of the sound source circuit 640, the corresponding sound source file may be transmitted to the sound source memory 642 by a wireless transmission method such as bluetooth, or the player may download the sound source file in the sound source memory 642.

After more than five years of efforts, the applicant successfully designs the electronic accordion of the utility model with the help and guidance of experts in the industry, accordion fans and the like, and the electronic accordion has the following advantages:

1. the bass machine (left hand) is designed to enable a bass button pressed by a player to directly touch the conductive silica gel button to touch and conduct sounding, the keyboard (right hand) is also designed to enable keys pressed by the player to directly touch the conductive elastic button to touch and conduct sounding, so that the whole electronic accordion structure becomes simple and is not complex any more, the production and manufacturing difficulty and the cost are reduced, the whole weight of the electronic accordion is reduced and is about 20% lighter than that of the existing foreign electronic accordion, and the weight of the electronic accordion is about 9.6 kilograms under the condition that the electronic accordion comprises a built-in loudspeaker and a power supply (24V lasts for 8 hours).

2. In the utility model, the audio (analog quantity) sent by the sound source circuit does not pass through the main control circuit any more, but is amplified and output by the power amplifying circuit directly through the volume adjusting circuit based on the amplifying multiple instruction corresponding to the air pressure value in the air bellow 100 detected by the wind pressure sensor, so that the audio is prevented from excessive operation processing such as analog-to-digital conversion and the like in the transmission process, the playing response speed is greatly improved, and in addition, the structural design that the response speed of the keyboard and the Bass machine to the finger pressing pronunciation is increased, the delay from playing to sounding of a player is greatly shortened to 3-7 milliseconds, and the playing experience is greatly improved.

3. The touch display screen is designed, so that the touch display screen is convenient and comfortable to operate and control, flexible in function selection and capable of being mastered without guidance of professionals.

4. The sound source circuit of the utility model can record and store the original sounds of more than one hundred musical instruments (including folk music elements embedded with Chinese characteristics), meets the international MIDI standard and is compatible with the digital sound source of the electrical music instrument.

5. The electronic accordion of the utility model has wireless functions of Bluetooth and the like, can download background music through a mobile phone, and has strong flexibility and practicability.

6. The electronic accordion integrates the loudspeaker and the power supply, so that the practicability and the portability are improved, and the portability is greatly improved.

The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solutions of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.

Claims (8)

1. The utility model provides an electronic accordion, is including the bass machine that is located the keyboard and the left hand side of player's right hand side respectively, links into an organic whole through airtight bellows between keyboard and the bass machine, still is equipped with between keyboard and the bellows and decorates lid, its characterized in that: the bass machine comprises a bass button, and a player presses the bass button to enable the bass button to directly touch a conductive silica gel button to be in contact with a contact on a bass button acquisition circuit so as to generate bass button position information for sounding; the keyboard comprises keys, and a player directly touches the conductive elastic buttons to contact with contacts on the key acquisition circuit by pressing the keys so as to generate key position information for sounding; the keyboard is a piano keyboard or a Bayan keyboard; the position information output port of the key acquisition circuit is connected with the information input port of the sound source circuit, the position information output port of the bass button acquisition circuit is connected with the information input port of the sound source circuit through the main control circuit, the control port of the main control circuit, the wind pressure signal output port of the wind pressure sensor arranged in the air box and the audio signal output port of the sound source circuit are respectively connected with the corresponding input ports of the volume adjusting circuit, and the audio output port of the volume adjusting circuit is connected with the input port of the loudspeaker through the power amplifying circuit.

2. The electronic accordion of claim 1, wherein:

and the bass machine is also provided with a bass sound changer, the keyboard is also provided with a keyboard sound changer, and signal output ports of the bass sound changer and the keyboard sound changer are respectively connected with corresponding signal ports of the main control circuit.

3. The electronic accordion of claim 2, wherein:

the keyboard is provided with a touch display screen, a signal port of the touch display screen is connected with a corresponding signal port of the main control circuit, the keyboard and the bass machine are enabled to play different musical instrument sounds respectively through the touch display screen, and the volume of the output sound is set when the keyboard and the bass machine are played through the touch display screen.

4. The electronic accordion of claim 3, wherein:

a battery bin is installed in the keyboard, a power supply is arranged in the battery bin, and the power supply supplies power to the outside through a power distribution circuit.

5. The electronic accordion as recited in any of claims 1 to 4, wherein:

the audio source circuit comprises an audio processor and an audio source memory, wherein: the audio processor is used for calling corresponding bass button tones from the sound source memory according to the received bass button position information, converting the corresponding bass button tones into analog audio volume and then sending the analog audio volume, and calling corresponding key tones from the sound source memory according to the received key position information, converting the corresponding key tones into the analog audio volume and sending the analog audio volume; the sound source storage is used for storing sound source files of various musical instruments;

the volume adjusting circuit includes a CPU, an AD converter, and an audio amplifier, wherein: the AD converter is used for carrying out analog-to-digital conversion on the received air pressure value in the air box detected by the air pressure sensor and then sending the air pressure value to the CPU; the CPU is used for sending an amplification factor instruction to the audio amplifier according to the volume amplification ratio instruction and based on the air pressure value in the air bellow detected by the air pressure sensor; the audio amplifier is used for directly amplifying the volume of the audio sent by the audio source circuit according to the received amplification factor instruction and then sending the audio.

6. The electronic accordion of claim 1, wherein:

the bass machine includes a plurality of bass buttons, and the bass button is installed in the confined space that is formed by the bass panel, support mount and circuit board and is exposed, has printed on the circuit board the bass button acquisition circuit, wherein: the base is provided with a positioning layer plate, a base plate and a conducting silica gel button, wherein the base plate is provided with a hole, the conducting silica gel button is arranged on the base plate, and the conducting silica gel button is arranged on the base plate; under the pressing action of the bass button pressed by a player, the conductive silica gel button moves downwards to be in contact with a corresponding contact of the bass button acquisition circuit on the circuit board to generate a conduction electric signal.

7. The electronic accordion of claim 6, wherein:

the bass button includes the button cap, and the top of button cap is followed stretch out in the button hole, and the bottom of button cap is equipped with the round cap limit, and the cap limit receives in the spacing and be in the enclosure space all the time of bass panel, the bottom surface of button cap with the top surface contact of conductive silica gel button is nevertheless unfixed, the bass button is in the guiding action that the button hole produced with can for under the elasticity of conductive silica gel button the button hole is done and is stretched out and the indentation motion.

8. The electronic accordion of claim 7, wherein:

conductive silica gel button is including being the elasticity main part of back-off bowl form, and elasticity main part bottom is equipped with the round chimb outwards, and the outer top of elasticity main part is equipped with silica gel button groove connection seat up, and the interior top of elasticity main part is equipped with the lug down, is equipped with conductive silicone rubber piece on the bottom surface of lug, conductive silicone rubber piece with corresponding contact on the shellfish button acquisition circuit is relative from top to bottom, wherein: and the conductive silicone button moves downwards under the pressing action of the Bass button so as to enable the conductive silicone rubber sheet to be in contact with the contact.

Images