CN215220245U - Key device and electronic percussion melody musical instrument - Google Patents

Abstract

The utility model discloses a key device and electron percussion melody musical instrument. Wherein this key device includes: a plurality of keys, wherein each of the keys is arranged to receive a tap from the outside; at least one first sensing unit configured to sense a tap on the key and output a corresponding first signal; and at least one second sensing unit configured to trigger and output a corresponding second signal when the target key receives the tap, so as to confirm the target key is effectively tapped together with the first signal output by the first sensing unit. The utility model discloses can confirm accurately and accept the key of effectively strikeing to can avoid the spurious triggering other keys that do not accept to strike to send the musical instrument sound.

Description

Key device and electronic percussion melody musical instrument

Technical Field

The present invention relates generally to the field of musical instruments. More particularly, the present invention relates to a key device and an electronic percussion melody musical instrument.

Background

The conventional percussion melody musical instruments make a sound by striking a key made of a vibration material, and amplify or the like the sound through a resonance box. Since some of the vibration materials are selected from very precious wood, the whole instrument is expensive. In addition, the volume of the instrument is too large to be portable due to the presence of the resonance box.

During playing, the existing electronic percussion melody musical instruments generate an electric signal related to the musical instrument sound by controlling the conduction of the circuit switch through the striking of the keys. However, since the existing percussion melody musical instruments have high material density of keys, vibrations generated when the keys are struck may be transmitted to other keys and generate other timbres, thereby affecting the playing effect of the electronic percussion melody musical instruments.

SUMMERY OF THE UTILITY MODEL

In order to solve one or more problems in the above-mentioned background art at least, the utility model provides a key device. That is, the first signal output by the first sensing unit and the second signal output by the second sensing unit when the key receives the strike can jointly confirm that the target key receives the effective strike, so as to avoid the influence on the playing effect caused by the false triggering of other keys. Based on this, the present invention provides in various aspects various solutions as follows.

In one aspect, the utility model discloses a key device, include: a plurality of keys, wherein each of the keys is arranged to receive a tap from the outside; at least one first sensing unit configured to sense a tap on the key and output a corresponding first signal; and at least one second sensing unit configured to trigger and output a corresponding second signal when the target key receives the tap, so as to confirm the target key is effectively tapped together with the first signal output by the first sensing unit.

In one embodiment, the second sensing unit includes at least a pressure sensor, and is disposed above, below, or on an upper surface of the key or embedded in the key.

In another embodiment, the first sensing unit comprises at least a piezo-ceramic sensor and/or a micro-electro-mechanical system.

In another aspect, the present invention also discloses an electronic percussion melody musical instrument including the key device according to the above embodiments.

In one embodiment, the electronic percussive melody musical instrument of the present invention further includes a storage unit configured to store sound source data associated with the plurality of keys; an output unit configured to output a tone signal corresponding to the sound source data associated with the target key; and a control unit configured to: receiving a first signal output by the first sensing unit when the target key receives a valid knock; acquiring sound source data associated with a first signal output by the first sensing unit when the target key receives a valid tap from the storage unit; and controlling the output unit to output a tone signal corresponding to the sound source data associated with the target key.

In another embodiment, the electronic percussive melody musical instrument of the present invention further includes a body for accommodating the control unit, the output unit, and the storage unit, and the key device further includes a conductive structure, wherein the conductive structure includes a stress panel supporting the keys and a pressure-receiving bottom plate located at one side of the body, and the first sensing unit is disposed between the stress panel and the pressure-receiving bottom plate; and the plurality of keys are arranged in at least two rows, wherein a first row is a half-pitch range and a second row is a full-pitch range, and the keys are further arranged by one of: a support is arranged on the stress panel and used for supporting and fixing the keys; or the key comprises a bottom surface attached to the stress panel and two side parts, wherein the inner surfaces of the two side parts are in surface contact with the stress panel and the end surfaces of the pressure bearing bottom plate, and the two side parts are partially inserted into the piano body to support and fix the key.

In still another embodiment, an anti-vibration material for preventing the first sensing unit from vibrating is filled between the stress panel and the pressure-bearing bottom plate.

In yet another embodiment, the at least one musical instrument of the electronic percussion melody of the present invention includes one or more of a xylophone, a tremolo and a marimba.

In yet another embodiment, the electronic percussion melody instrument of the present invention further comprises a transmission interface configured to enable the electronic percussion melody instrument to interact with an external device to provide an extended function of the electronic percussion melody instrument, wherein the transmission interface comprises a wired transmission interface and/or a wireless transmission interface to provide a wired and/or wireless connection with the external device.

In yet another embodiment, the electronic percussion melody musical instrument of the present invention further comprises a control panel and a power module, wherein the control panel is connected to the control unit and is configured to perform a function setting on the electronic percussion melody musical instrument, and the power module is configured to supply power to the electronic percussion melody musical instrument.

The utility model discloses a key device can confirm accurately and accept the key of strikeing to can avoid producing other timbres and influence the performance effect. Further, the utility model discloses an electron percussion melody musical instrument can also adopt wireless module such as bluetooth to communicate with external equipment to still be provided with multifunctional panel, thereby make the utility model discloses an electron musical instrument's volume further reduces and makes things convenient for the player to play. Furthermore, the utility model discloses an electronic musical instrument still has the tone quality good, plays and feels good, the interference killing feature is strong and external interface advantage such as many to satisfy different players to the multiple user demand of musical instrument.

Drawings

The above-described features of the present invention may be better understood, and its numerous objects, features, and advantages made apparent to those skilled in the art by reading the following detailed description with reference to the accompanying drawings. The drawings in the following description are only some embodiments of the invention, and other drawings can be derived by those skilled in the art without inventive effort, wherein:

fig. 1 is a block diagram showing an exemplary structure of a key device according to the present invention;

fig. 2 is an exemplary schematic diagram showing one specific embodiment of a key device according to the present invention;

fig. 3a is an exemplary schematic diagram illustrating a first and a second sensing unit layout according to the present invention;

fig. 3b is an exemplary schematic diagram showing another layout of the first and second sensing units according to the present invention;

fig. 4 is a block diagram showing an exemplary structure of an electronic percussion melody musical instrument according to the present invention;

fig. 5 is a schematic view showing an exemplary structure of a key device according to the present invention;

fig. 6 is a schematic view showing an exemplary structure of a key according to the present invention;

fig. 7 is another exemplary structural view showing a key device of an electronic percussion melody musical instrument according to an embodiment of the present invention;

fig. 8 is a block diagram showing the composition of an electronic percussion melody musical instrument according to an embodiment of the present invention; and

fig. 9 shows an internal structure of an IC sound source memory according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 is a block diagram showing an exemplary structure of a key device 100 according to the present invention.

As shown in fig. 1, the key apparatus 100 of the present invention may include a plurality of keys 102, at least one first sensing unit 104, and at least one second sensing unit 106. Among them, the aforementioned plural keys 102 may be arranged to receive a stroke from the outside, for example, to receive a player's stroke with a hammer. The aforementioned first sensing unit 104 may be configured to strike the aforementioned key and output a corresponding first signal and the aforementioned second sensing unit 106 may be configured to trigger and output a corresponding second signal when the target key receives the strike, so as to confirm that the target key is effectively struck together with the first signal output by the aforementioned first sensing unit 104.

In one embodiment, the first sensing unit may include, but is not limited to, a piezo-ceramic sensor and/or a micro-electro-mechanical system, for example, in some embodiments, the first sensing unit may also be a vibration sensor or a flexible bending sensor. The piezoceramic sheet is a device which converts pressure (or strain) generated by hitting a key into current (or charge) and outputs the current (or charge) by using the piezoelectric effect of the piezoceramic sheet, wherein the piezoceramic sheet is a key component in the piezoceramic sensor. From the perspective of signal transformation, the piezoceramic sheet acts as a charge generator. When the piezoelectric ceramic plate is acted by external force, the piezoelectric ceramic plate can generate deformation and release electric charge due to the deformation, and then current is generated and output. The utility model discloses in, through the piezoelectric effect of piezoceramics piece, will strike produced pressure (or meet an emergency) of key and convert the electric energy of analog signal of telecommunication form to convert the digital signal of telecommunication (being first signal) that can export into through AD and export.

The piezoelectric ceramic sensor can generate currents with different magnitudes according to different pressures. Therefore the utility model discloses a key device can also be according to the player strike the difference of the dynamics of key and send the musical instrument sound of different volume sizes to make and have the audio when more being close to strike traditional musical instrument in the performance process. In addition, the range of the force with which the player strikes the key can also be increased by increasing the sensitivity of the piezoelectric ceramic sensor. Here, the sensitivity of the piezoceramic sensor refers to the ratio of a small increase in current output to a corresponding small increase in pressure input. The larger the ratio is, the higher the sensitivity of the piezoelectric ceramic sensor is, so that the requirements of players with different knocking forces can be met.

For a microelectromechanical system, it may sense a physical response to a key stroke and convert the physical response into an electrical signal (i.e., a first signal). In one embodiment, the aforementioned physical responses may include, but are not limited to, vibration, unidirectional displacement, acceleration, pressure, and the like.

As known to those skilled in the art, a Micro electro mechanical System (abbreviated as "MEMS") may include a Micro sensor and a Micro actuator. It refers to a micro-electromechanical system that can integrate micro-sensors, actuators, signal processing and control circuits, interface circuits, communication and power. The micro-sensor can be a novel sensor manufactured by micro-electronics and micro-machining technology. Compared with the traditional sensor, the sensor has the characteristics of small volume, light weight, low cost, low power consumption, quick response, high sensitivity, easiness in integration, realization of intellectualization and the like. The aforementioned micro-sensors can measure various physical, chemical and biomass quantities such as displacement, velocity, acceleration, pressure, stress, sound, light, electricity, magnetism, heat, etc. At the same time, feature sizes on the order of microns allow it to perform functions that some conventional mechanical sensors cannot.

The above-described microactuators may be used to provide a variety of motions and controls, which are key components in MEMS. In one embodiment, the micro-actuator may be, for example, a micro-motor, micro-tweezers, micro-pump, micro-valve, micro-optics, printer head, hard disk head, and the like. Furthermore, the micro sensor, the micro actuator and the related signal processing and control circuit are integrated on a chip to complete certain functions, thereby forming the micro electro mechanical system module.

In one embodiment, when a key is struck or depressed, the key transmits the pressure to which it is subjected to a micro-actuator of a microelectromechanical system, causing the micro-actuator to produce a micro-motion. Then, the micro-sensor senses the micro-motion and outputs an electric signal with a certain rule or other information in a required form according to the magnitude of the micro-motion. Further, the electric signal or the information is processed by a signal processing and control circuit, and is finally output to the body through an interface circuit.

In one embodiment, the second sensing unit may be, but is not limited to, a pressure sensor. The pressure sensor can sense a pressure signal of the key when the key receives a knock, and can convert the pressure signal into an electric signal (namely, a second signal) which can be output according to a certain rule, so that the first signal output by the first sensing unit and the pressure signal can jointly confirm that the key of the target is effectively knocked. Specifically, when the key receives the strike, the first sensing unit outputs the first signal, and the second sensing unit outputs the second signal, which indicates that the target key is effectively struck, that is, the key received the strike is the target key. How to confirm that the target key has accepted the valid tap will be described in detail below with reference to fig. 2.

Fig. 2 is an exemplary schematic diagram showing one specific embodiment of the key device according to the present invention. As shown in fig. 2, which exemplarily shows two keys 102-1 and 102-2 on the left and right, a first sensing unit 104-1 is disposed below the key 102-1, and a second sensing unit 106-1 is disposed below the first sensing unit 104-1. Similarly, a first sensing unit 104-2 is disposed below the key 102-2, and a second sensing unit 106-2 is disposed below the first sensing unit 104-2. It is assumed that, during a performance, when a player strikes a key 102-1 with a hammer, the first sensing unit 104-1 outputs a first signal by sensing that it is struck. At the same time, the vibration generated by the key 102-1 may be transmitted to the key 102-2, thereby erroneously triggering the first sensing unit 104-2 to output the first signal as well. In this scenario, since the hammer generates a downward pressure on the key 102-1, the second sensing unit 106-1 senses the aforementioned pressure signal and outputs a second signal, while the second sensing unit 106-2 does not sense the pressure and thus does not output a signal. Thus, it is confirmed that the key 102-1 has received a valid tap by the first signal output from the first sensor unit 104-1 and the second signal output from the second sensor unit 106-1.

According to the above description, the utility model provides a key device can confirm accurately through the first signal of first sensing unit output and the second signal of second sensing unit output and accept the target key of effectively strikeing to avoid other keys of spurious triggering to produce other timbres and influence the performance effect.

In one implementation scenario, the second sensing unit may be disposed above or below the first sensing unit. Further, the second sensing unit may also be disposed on the upper surface of the key or embedded in the key. The layout of the first and second sensing units will be described below with reference to fig. 3 a-3 b.

Fig. 3a is an exemplary schematic diagram illustrating a layout of a first sensing unit and a second sensing unit according to the present invention. As shown in fig. 3a, the left schematic view in the figure shows a key 102, a first sensing unit 104 is disposed below the key 102, and a second sensing unit 106 is disposed below the aforementioned first sensing unit 104, i.e., the second sensing unit is disposed below the first sensing unit. The schematic diagram on the right in the figure shows a key 102, with a second sensing unit 106 arranged below the key 102, and a first sensing unit 104 arranged below the aforementioned second sensing unit 106, i.e., above the first sensing unit.

Fig. 3b is an exemplary schematic diagram illustrating another layout of the first and second sensing units according to the present invention. As shown in fig. 3b, the key 102 is shown, the second sensing unit 106 is disposed above the entire key 102, and the first sensing unit 104 is disposed below the key 102.

The present invention also provides an electronic percussion melody musical instrument, which may include the key device described in conjunction with fig. 1, and may further include a storage unit, an output unit, and a control unit. In some embodiments, the electronic percussion melodic instruments of the present invention are at least one musical instrument, which may include, but is not limited to, one or more of xylophone, tremolo and marimba. The electronic percussion melody musical instrument of the present invention will be described in detail with reference to fig. 4.

Fig. 4 is a block diagram showing an exemplary structure of an electronic percussion melody musical instrument 400 according to the present invention. As shown in fig. 4, the electronic percussion melody musical instrument 400 of the present invention may include a key device 100, a storage unit 402, an output unit 404, and a control unit 406. Wherein the key apparatus 100 includes a plurality of keys 102, at least one first sensing unit 104, and at least one second sensing unit 106. As described above, it is possible to confirm that the target key has accepted the valid tap by the first signal output from the first sensing unit and the second signal output from the second sensing unit.

In one embodiment, the storage unit may be configured to store sound source data associated with a plurality of keys. In an application scenario, the sound source data may include data related to the timbre and/or sound effect of at least one musical organ, for example. Further, the electronic percussion melody musical instruments of the present invention can exhibit the same performance effect as the existing various percussion melody musical instruments according to the difference of the aforementioned sound source data or the different setting of the key device.

In one embodiment, the output unit may be configured to output a tone signal corresponding to sound source data associated with a target key that received a valid tap. In one application scenario, the output unit may be a speaker including a power amplifier, so that the sound signal corresponding to the target key that is effectively struck is amplified and played in the form of sound.

In one embodiment, the control unit may be configured to perform the following operations: first, the control unit receives a first signal output from the first sensing unit when the target key receives a valid tap. Then, the control unit may acquire sound source data associated with the first signal from the storage unit in accordance with the first signal output by the first sensing unit when the target key receives the valid tap. Finally, the control unit can send the sound source data associated with the target key which is effectively knocked to the output unit, and then the output unit is controlled to output the piano tone signal corresponding to the sound source data associated with the target key which is effectively knocked. From this, according to the utility model discloses a scheme can output and accept the musical instrument sound that the target key that effectively strikes corresponds to can avoid the tone quality that other keys of spurious triggering produced and influence the performance effect.

In some embodiments, the key device of the present invention may further include a conductive structure, and the electronic percussion melody musical instrument of the present invention may further include a body. The conductive structure comprises a stress panel for supporting the keys and a pressure-bearing bottom plate positioned on one side of the body, and the first sensing unit and the second sensing unit can be arranged between the stress panel and the pressure-bearing bottom plate. Further, the plurality of keys are arranged in at least two rows, wherein the first row is a half-pitch range and the second row is a full-pitch range, and the aforementioned keys may be arranged in at least the following two ways:

in one implementation scenario, the key may be supported and fixed by supports arranged on the stress panel.

In another implementation scenario, the key may further include a bottom surface attached to the stress panel and two side portions, wherein inner surfaces of the two side portions are in surface contact with end surfaces of the stress panel and the pressure bearing bottom plate, and are partially inserted into the body so as to support and fix the key.

The body may be a hollow structure, which may be made of metal or composite material. In the cavity, a memory unit, an output unit, a control unit, a power supply module, and other accessory circuit boards or modules may be included. The external surface of the body can be provided with a control panel and various transmission interfaces so as to facilitate the performance of a player. The foregoing key device will be described in detail with reference to fig. 5 to 7.

Fig. 5 is a schematic view showing an exemplary structure of a key device according to the present invention. It is to be understood that the key device is one specific embodiment of the key device described in fig. 1 above. Therefore, the above description of fig. 1 with respect to the key device is equally applicable to fig. 5.

As shown in fig. 5, the conductive structure of the key apparatus includes a stress panel 502 supporting the key 102 and a pressure-bearing bottom plate 503 on the body side, and supports 501 are provided on the stress panel 502 to support and fix the key 102. Further, a first sensing unit 104 and a second sensing unit 106 are arranged between the stress panel 502 and the backing plate 503. In some embodiments, the stress panel 502 and the pressure-bearing bottom plate 503 may also be arranged with an anti-vibration material (e.g., sponge) that prevents the first sensing unit from vibrating. As described above, the aforementioned key 102 may further include a bottom surface to which the stress panel 502 is attached and two side portions, wherein inner surfaces of the two side portions are brought into surface contact with end surfaces of the stress panel 502 and the pressure-bearing bottom plate 503, and are partially inserted into the body 504 so as to support and fix the key.

Fig. 6 is a schematic view showing an exemplary structure of a key according to the present invention. As shown in fig. 6, in one embodiment, the plurality of keys of the present invention may be made of composite material and may be arranged in two rows, wherein the first row may be provided as a semitone region, as shown in the figure as the upper row consisting of note numbers # C, # D, # F, # G and # a …; while the second row may be provided as a diatonic region, as shown in the lower row of note numbers C, D, E, F, G, A and B ….

Fig. 7 is another exemplary structural view showing a key device of an electronic percussion melody musical instrument according to an embodiment of the present invention. As shown in fig. 7, the conductive structure of the key apparatus includes a stress panel 502 supporting the key 102 and a pressure-bearing bottom plate 503 on the body side. Further, a first sensing unit 104 and a second sensing unit 106 are arranged between the stress panel 502 and the backing plate 503. In some embodiments, the stress panel 502 and the pressure-bearing bottom plate 503 may also be arranged with an anti-vibration material (e.g., sponge) that prevents the first sensing unit from vibrating. Unlike the structure of the key apparatus in fig. 5 described above, the key 102, body 504, and conductive structure of the key apparatus in fig. 7 may be a tightly-coupled integrated structure.

Specifically, the above-mentioned conductive structure includes a stress panel supporting the key and a pressure-receiving base plate on the side of the body, and the first and second sensing units may be arranged between the stress panel and the pressure-receiving base plate. The aforementioned key comprises a bottom face, which is conformed by a stress panel, and two side portions, which may be made of one or more composite or natural materials, preferably rubber. As is apparent from the above description, the key may be arranged in the following manner: the inner surfaces of the two side parts are in surface contact with the end surfaces of the stress panel and the pressure bearing bottom plate, and are partially inserted into reserved hole positions of the piano body so as to fix the piano body and the keys. The detailed description of the layout among the keys, the first sensing unit, the second sensing unit and the body is described in the corresponding description of the body device in fig. 5, and is not repeated herein.

Fig. 8 is a block diagram showing the composition of an electronic percussion melody musical instrument 800 according to an embodiment of the present invention. As shown in fig. 8, the electronic percussion melody musical instrument 800 of the present invention may include keys 102, a first sensing unit 104, a second sensing unit 106, an a/D conversion module 801, a filtering module 802, a main control unit 803, an IC sound source memory 804, a data memory 805, a power amplifier 806, a speaker 807, a bluetooth module 808, an optical fiber module 809, and a MIDI interface 810.

In one embodiment, the a/D conversion module includes an a/D conversion chip and its accessory circuits, which are configured to convert the analog electrical signals output by the first sensing unit and the second sensing unit into digital electrical signals and input the digital electrical signals to the main control unit (or the control unit). Specifically, the a/D conversion functions to convert an analog signal continuous in time and amplitude into a digital signal discrete in time and amplitude. Generally, the aforementioned a/D conversion requires 4 processes of sampling, holding, quantizing, and encoding. In practical circuits, some of the foregoing processes may be combined, for example, quantization and coding are often implemented simultaneously in the conversion process.

In one embodiment, the filtering module may include a filter and its associated circuits configured to filter the output digital electrical signal and send the filtered digital electrical signal to the master control unit. During the playing of the electronic percussion melody musical instrument, low or high frequency interference signals may be generated in the circuit due to the electrical characteristics of the electronic components, which may affect the reception of useful signals associated with the striking of the keys. Therefore, the digital electric signal output by the a/D conversion module can be processed by a filter composed of a resistor and a capacitor, for example, so as to filter out interference signals therein, and ensure normal reception of useful signals.

In one embodiment, the memory of the present invention may include an IC audio source memory and a data memory. Wherein the IC sound source memory arrangement may be configured to store sound source data associated with a plurality of keys, and the sound source data includes, but is not limited to, data relating to timbre and/or sound effect of one or more of a xylophone, a tremolo and a marimba. The internal structure of the IC sound source memory will be briefly described with reference to fig. 9.

Fig. 9 shows an internal configuration of an IC sound source memory 900 according to an embodiment of the present invention. As shown in fig. 9, the IC sound source memory stores waveform data of sound source data [0] to sound source data [ n ], where the sound source data [0] is waveform data of the lowest note and the sound source data [ n ] is waveform data of the highest note, where the magnitude of the value of n depends on the number of keys. When sound source data is stored in the same number of wavelengths, since the wavelength of bass is longer, the data of sound source data corresponding to a lower note number is longer than the data of sound source data corresponding to a higher note number, and therefore the storage space occupied by the data of sound source data in the IC sound source memory is larger. In one embodiment, the aforementioned sound source data corresponds to the keys shown in fig. 6 one-to-one, for example, the sound source data [0] may correspond to the note number C of the key shown in fig. 6, the sound source data [1] may correspond to the note number D of the key shown in fig. 6, for example, and the like.

In one embodiment, the above-described data memory configuration may be used to store programs and data related to controlling the operation of the electronic percussion melody instrument-related modules and units, and may also store other music data related to performance. The data storage device may be connected to the main control unit through a bus, may include a plurality of sets of memory cells, and each set of memory cells is connected to the main control unit through the bus.

In one embodiment, the master control unit of the present invention may be implemented, for example, using a digital signal processor ("DSP"). The DSP is a microprocessor suitable for performing digital signal processing operations, and is mainly applied to rapidly implement various digital signal processing algorithms in real time. To the utility model discloses an adopt DSP as the main control unit, can handle audio signal fast in real time. Specifically, firstly, the DSP receives digital electrical signals output from the first sensing unit and the second sensing unit and subjected to a/D conversion and filtering; then, the DSP acquires sound source data associated with the digital electric signal (namely, a first signal) output by the first sensing unit when the target key which is effectively knocked is received from the IC sound source memory according to the output digital electric signal; finally, the DSP sends the sound source data to an output unit so as to output the organ sound signals corresponding to the sound source data.

In one embodiment, the power amplifier may be composed of three parts: the power amplifier comprises a preamplifier circuit, a drive amplifier circuit and a final-stage power amplifier circuit. The pre-amplifier circuit is configured for impedance matching, which has the advantages of high input impedance and low output impedance, so that the current signal of the audio source data can be received and transmitted with the least data loss. The drive amplifying circuit is configured to further amplify the current signal sent by the pre-amplifying circuit into a signal with medium power so as to drive the final-stage power amplifying circuit to normally work. The final power amplifying circuit plays a key role in the power amplifier, the technical index of the final power amplifying circuit determines the technical index of the whole power amplifier, and the final power amplifying circuit is configured to amplify a current signal sent by the driving amplifying circuit into a high-power signal so as to drive a loudspeaker to play sound.

In one embodiment, the speaker may include a magnet, a frame, a centering pad, a cone, a diaphragm, and the like. Alternatively, the speaker may further include the power amplifier described above. A loudspeaker, commonly known as a "horn", is a transducer device that converts an electrical signal into an acoustic signal. Specifically, the audio power signal causes the cone or diaphragm of the speaker to vibrate and resonate (resonate) with the surrounding air to generate sound through electromagnetic, piezoelectric, or electrostatic effects. Optionally, this speaker can also arrange in the utility model discloses an electron percussion melody musical instrument's outside, it can through wireless communication techniques such as bluetooth with the utility model discloses an electron percussion melody musical instrument carries out wireless connection.

In one embodiment, the electronic percussion melody musical instrument of the present invention may further include a transmission interface. Which is configured to cause the electronic percussion melody instrument to interact with an external device to provide an extended function of the aforementioned electronic percussion melody instrument, wherein the transmission interface includes a wired transmission interface and/or a wireless transmission interface to provide wired and/or wireless connection with the external device. As a specific implementation, the wired transmission Interface may be, for example, one or more of a music device Digital Interface ("MIDI"), a General-purpose input/output ("GPIO") Interface, a high-speed Serial computer expansion bus ("PCIE") Interface, a Serial Peripheral Interface ("SPI"), and an optical fiber Interface, as required.

The wired transmission interface may be electrically connected to the main control unit, so as to realize data transmission between the electronic percussion melody musical instrument and an external device (e.g., a server, a computer, or other musical instruments). In one embodiment, the wired transmission interface may be, for example, a standard PCIE interface. Pending data is transmitted to the computer through standard PCIE interface by the main control unit, and then realizes that it is right through the computer the utility model discloses an audio signal of musical instrument output controls and operation such as editing.

In another embodiment, the wired transmission interface may be a MIDI interface. MIDI is a standard for digital music, which defines various notes or playing codes for playing devices such as electronic musical instruments and allows electronic musical instruments, computers or other playing devices to be connected, adjusted and synchronized with each other so as to exchange playing data among the musical instruments in real time. In one embodiment, the MIDI interface is configured for data communication between the electronic percussion melody musical instrument of the present invention and a musical instrument having the MIDI interface, thereby realizing a joint performance between a plurality of musical instruments.

In yet another embodiment, the wired transmission interface may be an optical fiber interface including an optical module, which is configured for data transmission between the musical instrument and an external device of the present invention. Specifically, the light module may include a light emitting module and a light receiving module. In an application scenario, on the one hand, the utility model discloses an electric signal of data that the main control unit of musical instrument sent is handled through the inside driver chip of aforementioned optical transmission module to drive semiconductor Laser (LD) or emitting diode (LED) launch the modulation light signal of corresponding speed, and with the coupling of aforementioned light signal in the optic fibre, so that transmit for external equipment through optic fibre. On the other hand, the optical signal of the data sent by the external device is processed by the optical detection diode and the amplifier in the optical receiving module, so as to output the electric signal with the corresponding code rate, and the output electric signal is transmitted to the main control unit. The utility model discloses a carry out data transmission through light signal between musical instrument and the external equipment, not only can effectively overcome the big shortcoming of signal transmission's decay, data transmission speed is faster moreover, the interference killing feature is stronger to signal transmission's quality has been improved.

In another embodiment, the wireless transmission interface may be one or more of a bluetooth interface, an infrared interface, a WIFI interface, etc., for example, as desired. The wireless transmission interface can be connected with the main control unit in a wireless mode, so that data transmission between the electronic percussion melody instrument and an external device (such as a server, a computer or other instruments) is realized. In one embodiment, the aforementioned wireless transmission interface may be, for example, a bluetooth interface including a bluetooth module, and the aforementioned bluetooth interface may be used to connect the utility model discloses a musical instrument and external speaker, wherein the bluetooth module is provided in the electronic percussion melody musical instrument and the speaker, so as to realize conveniently and flexibly placing the position of the external speaker according to the needs of playing on the spot.

In one embodiment, the electronic percussion melody musical instrument of the present invention may further include a control panel connected to the control unit through a line site interface and configured to perform function setting on the electronic percussion melody musical instrument. In one embodiment, the control panel may include, for example, a display screen, a switch key of a different musical instrument, a volume key, and other functional modules. The display screen is configured to display a performance state of the current percussion melody instrument. The switching keys of different types of organs can be used for selecting the playing modes of different types of percussion melody instruments such as xylophone, marimba or tremolo and the like. The volume key is connected with the power amplifier and is configured to control the size of the sound signal.

In one embodiment, the electronic percussion melody musical instrument of the present invention may further include a power module, which may supply power to the electronic percussion melody musical instrument in various ways. For example, but not limited to, the electronic percussion melody instrument may be powered by connecting with the mains and arranging the voltage transformation unit inside the power module. The electronic percussion melody musical instrument may be powered by a power adapter. In addition, a battery box can be arranged on the musical instrument body, and the electric percussion melody musical instrument can be powered through a dry battery.

The operation of the electronic percussion melody musical instrument of the present invention will be described in detail with reference to the key device shown in fig. 5 as an example.

When the player needs to utilize the utility model discloses an electron percussion melody musical instrument when using as the xylophone, its mode that can pass through the button on control panel will the utility model discloses an electron percussion melody musical instrument sets up to the xylophone. The performance starts, and the player strikes a key with a hammer, for example, a key represented by note number C. The pressure generated by the tapping is transmitted by a transmission mechanism to, for example, a piezo-ceramic sensor, which releases electrons due to the piezo effect and converts the mechanical energy generated by the tapping into electrical energy in the form of an analog electrical signal. At the same time, the key of note number C that is effectively struck rapidly stops vibrating under the combined action of the vibration-proof composite material and the support within the conductive structure, and is quickly sprung back to the state before being struck so as to wait for the next strike.

Then, the a/D conversion module receives the analog electrical signal sent by the piezoelectric ceramic sensor, and converts the analog electrical signal into a digital electrical signal after a series of processing such as sampling, quantization, and encoding. Then, the digital electric signal is processed by a filtering module so as to effectively filter out high-frequency and low-frequency interference signals therein. Then, the digital electric signals related to the keys of note number C after being processed by the filtering module are transmitted to the main control unit. Then, the main control unit performs table lookup in the IC sound source memory to acquire sound source data [0] associated with the key of the sound source number C. Then, the main control unit outputs the sound source data [0] to the power amplifier.

Then, the power amplifier processes the received sound source data [0] signal through a pre-amplifying circuit, a driving amplifying circuit and a final power amplifying circuit respectively and sequentially, and finally amplifies the sound source data [0] signal. The amplified signal of the sound source data [0] can be transmitted to a loudspeaker in a wired or wireless manner for playing, so that the listener can listen to the sound emitted from the key of the sound source number C which is effectively tapped. If the player need with the utility model discloses an electron percussion melody musical instrument connects computer or other electron musical instruments to when carrying out music study or joint performance through APP software, then can be connected with above-mentioned equipment through bluetooth module or MIDI interface.

It should be understood that the terms "first," "second," "third," and "fourth," etc. in the claims, description, and drawings of the present invention are used for distinguishing between different objects and not for describing a particular order. The terms "comprises" and "comprising," when used in the specification and claims of the present invention, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and claims of this application, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of the present invention refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

As used in this specification and claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

Although the embodiments of the present invention are described above, the descriptions are only examples for facilitating understanding of the present invention, and are not intended to limit the scope and application of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A key device, characterized by comprising:

a plurality of keys, wherein each of the keys is arranged to receive a tap from the outside;

at least one first sensing unit configured to sense a tap on the key and output a corresponding first signal; and

at least one second sensing unit configured to trigger and output a corresponding second signal when the target key receives the tap, so as to confirm the target key is effectively tapped together with the first signal output by the first sensing unit.

2. The key device according to claim 1, wherein the second sensing unit includes at least a pressure sensor, and is disposed above, below, or on an upper surface of the key or embedded in the key.

3. The key device according to claim 2, wherein said first sensing unit includes at least a piezoceramic sensor and/or a microelectromechanical system.

4. An electronic percussion melodic instrument, characterized by comprising the key device according to any one of claims 1 to 3.

5. The electronic percussion melodic instrument of claim 4, further comprising:

a storage unit configured to store sound source data associated with the plurality of keys;

an output unit configured to output a tone signal corresponding to the sound source data associated with the target key; and

a control unit configured to:

receiving a first signal output by the first sensing unit when the target key receives a valid knock;

acquiring sound source data associated with a first signal output by the first sensing unit when the target key receives a valid tap from the storage unit; and

and controlling the output unit to output a piano tone signal corresponding to the sound source data associated with the target key.

6. The electronic percussion melodic instrument of claim 5, further comprising a body for accommodating the control unit, the output unit and the storage unit, and the key device further comprises a conductive structure, wherein

The conducting structure comprises a stress panel for supporting keys and a pressure-bearing bottom plate positioned on one side of the piano body, and the first sensing unit is arranged between the stress panel and the pressure-bearing bottom plate; and

the plurality of keys are arranged in at least two rows, wherein a first row is a half-pitch range and a second row is a full-pitch range, and the keys are further arranged by one of:

a support is arranged on the stress panel and used for supporting and fixing the keys; or

A

The key comprises a bottom surface and two side parts attached to the stress panel, wherein the bottom surface and the two side parts are respectively provided with a key hole

The inner surfaces of the two side parts are in surface contact with the end surfaces of the stress panel and the pressure-bearing bottom plate, and

and is partially inserted into the body to support and fix the key.

7. The electronic percussion melody instrument of claim 6, wherein a vibration-proof material for preventing the first sensing unit from vibrating is filled between the stress panel and the pressure-receiving base plate.

8. The electronic percussion melodic instrument of claim 4, wherein the at least one musical instrument comprises one or more of a xylophone, a tremolo and a marimba.

9. The electronic percussion melodic instrument of claim 4, further comprising a transmission interface configured to enable the electronic percussion melodic instrument to interact with an external device to provide extended functionality of the electronic percussion melodic instrument, wherein the transmission interface comprises a wired transmission interface and/or a wireless transmission interface to provide a wired and/or wireless connection with the external device.

10. The electronic percussion melodic instrument of claim 6, further comprising a control panel and a power module, wherein the control panel is coupled to the control unit and is configured to provide a functional setting for the electronic percussion melodic instrument and the power module is configured to provide power to the electronic percussion melodic instrument.

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