Sound triggering device for electroacoustic musical instrument

Abstract

The invention discloses a sound triggering device for an electroacoustic musical instrument, and belongs to the field of electroacoustic musical instrument control, and the device comprises a pedestal which is provided with a sliding rod; the triggering part comprises a shifting piece and a grid piece, is arranged on the sliding rod in a sleeving manner and is used for converting external shifting applied to the shifting piece into sliding of the grid piece along the sliding rod; and the detector is electrically connected with the electroacoustic musical instrument and is used for detecting the positive and negative directions and the movement speed of the grid plate moving along the sliding rod and converting the positive and negative directions and the movement speed into electric signals so as to enable the electroacoustic musical instrument to generate sound. According to the sound triggering device provided by the technical scheme of the invention, through the mechanical translation of the poking piece and the combination of the grid piece and the detector, the device can realize the detection of the positive and negative directions and the movement speed of the grid piece moving along the sliding rod, and the problems of high cost, large abrasion and complex system of a traditional musical instrument sound triggering device are solved.

Description

Technical Field

[0001] The invention belongs to the field of electro-acoustic musical instrument control, and in particular relates to a sound triggering device for an electro-acoustic musical instrument. Background Art

[0002] The performance of traditional string instruments usually requires the performer to press chords and pluck the strings at the same time. For beginners, this requires a high level of coordination and is difficult to learn. In order to lower the threshold for performance, new electronic instruments have emerged. This type of electronic instrument has a preset music sequence and is equipped with an instrument segment selector, so that the user only needs to press a single finger to achieve the effect of pressing chords with multiple fingers in traditional instruments. In addition, the electronic instrument also has a music performance trigger. The user can trigger the music performance by applying different levels of plucking, thereby simulating the plucking trigger effect of traditional string instruments.

[0003] In the prior art, Chinese invention application CN221261950U discloses a strum switch for a stringless guitar, which includes a chip built into the guitar body and a beam-type photoelectric switch controlled by the chip, and the photoelectric switch is used to trigger the chip to control the stringless guitar to make sound. However, the signal transceiver hole and the strum switch of the beam-type photoelectric switch are both arranged outside the guitar body, and its triggering depends on the user's finger blocking the strum switch position, completely abandoning the physical blocking member that fixes the plectrum or performs the plectrum function. Although this design reduces the number of mechanical parts, it also greatly increases the risk of accidental touches, affecting the accuracy and stability of the performance. Summary of the invention

[0004] Based on this, the sound trigger device provided by the technical solution of the present invention realizes the detection of the movement direction and speed of the grid along the slide bar through the translational movement of the pick along the slide bar and the combination of the grid and the detector, thereby solving the problems of high cost, high wear and complex system of traditional musical instrument sound trigger devices.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a sound triggering device for an electro-acoustic musical instrument, the sound triggering device comprising: a base, provided with a sliding rod; a triggering part, comprising a plectrum and a grid, sleeved on the sliding rod, for converting the external plectrum applied to the plectrum into the sliding of the grid along the sliding rod; and a detector, electrically connected to the electro-acoustic musical instrument, for detecting the positive and negative directions and movement speed of the grid along the sliding rod, and converting it into an electrical signal to enable the electro-acoustic musical instrument to produce sound.

[0006] Preferably, the detector includes one and only one pair of optical transceiver tubes, the optical transceiver tubes include a light emitting tube and a light receiving tube, the light emitted by the light emitting tube is modulated by the trigger unit and received by the light receiving tube; the modulation includes reflection modulation and transmission modulation.

[0007] Furthermore, the paddle is slidably connected to the slide bar to receive the external paddle movement to trigger the sliding along the slide bar; the grating is fixedly connected to the paddle to modulate the light emitted by the light emitting tube by sliding along the slide bar.

[0008] Furthermore, the grid plate is provided with grid teeth, and an extension direction of the grid teeth is perpendicular to an extension direction of the sliding rod.

[0009] Preferably, the spacing between the teeth of the grating sheet gradually increases or decreases along the direction of the sliding rod.

[0010] In particular, the reflectivity of each grating tooth of the grating plate is different.

[0011] Furthermore, the trigger portion also includes a reset member for restoring the paddle to an initial position before being pulled.

[0012] Preferably, the light emitted by the light emitting tube is infrared light.

[0013] The beneficial effects achieved by the present invention through the above technical solution are:

[0014] 1) The electro-acoustic instrument is triggered by the mechanical straight sliding movement of the pick, making the performance of the electro-acoustic instrument closer to the plucking feel of traditional instruments, preventing the instrument from disturbing others while experiencing the fun of playing, making beginners more willing to improve their playing skills through the practice of electro-acoustic instruments.

[0015] 2) Through the reasonable design of the shape and reflectivity of the grid teeth, the sound trigger device provided by the present invention uses only a pair of photoelectric transceiver tubes to detect the positive and negative directions and speed of the grid movement, which simplifies the system, reduces production costs, and saves limited internal space of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a sound triggering device for performing reflection modulation according to an embodiment of the present invention.

[0017] Figure 2 It is a diagram of the signal strength of the light receiving tube when the grating moves in opposite directions according to the embodiment of the present invention.

[0018] Figure 3 yes Figure 1 A is a schematic diagram of the partially enlarged structure of FIG.

[0019] Figure 4 Schematic diagram of the grid structure of an embodiment of the present invention.

[0020] Figure 5 It is a diagram of the signal strength of the light receiving tube in different movement modes of the grating in the embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of the structure of a sound triggering device for transmission modulation according to an embodiment of the present invention.

[0022] Figure 7 1 is a signal strength diagram of a transmission-modulated optical receiving tube according to an embodiment of the present invention.

[0023] The symbols in the figure represent:

[0024] 1. Base; 2. Reset member; 3. Slide rod; 4. Pick; 5. Light transceiver tube; 6. Grid plate; 51. Light receiving tube; 52. Light emitting tube; 61. First grid tooth; 62. Second grid tooth. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention more clear, the specific implementation of the present invention is further described in detail below in conjunction with examples. It should be understood that the embodiments described herein are only used to explain the present invention, but are not used to limit the scope of the present invention.

[0026] Embodiment 1

[0027] The sound triggering device of the embodiment of the present invention comprises a base 1, a triggering part and a detector. A slide bar 3 is arranged on the base 1. The triggering part comprises a plectrum 4 and a grid 6, and the triggering part is integrally sleeved on the slide bar 3, and is used to convert the external plectrum applied to the plectrum 4 into the translational movement of the grid 6 along the slide bar 3. The detector is electrically connected to the electro-acoustic instrument, and is used to detect the movement direction and movement speed of the grid 6 along the slide bar 3, and convert it into an electrical signal so that the electro-acoustic instrument produces sound.

[0028] Please refer to the attached Figure 1 , Figure 1: is a schematic diagram of the structure of a sound trigger device for reflection modulation according to an embodiment of the present invention. In an embodiment of the present invention, the detector includes a photoelectric sensor and a circuit board, wherein the photoelectric sensor includes a pair of light transceiver tubes 5, and in an embodiment of the present invention, the photoelectric sensor only includes a pair of light transceiver tubes 5. The light transceiver tube 5 includes a light emitting tube 52 and a light receiving tube 51, and the light emitted by the light emitting tube 52 is modulated by the trigger unit and received by the light receiving tube 51. In an embodiment of the present invention, the modulation performed by the trigger unit on the light of the light emitting tube 52 is reflection modulation. In one or other embodiments of the present invention, the modulation may be transmission modulation. In particular, in an embodiment of the present invention, the light emitted by the light emitting tube 52 is infrared light. In one or other embodiments of the present invention, the photoelectric sensor may also use light of other wavelengths, such as far infrared light, visible light, microwave, or ultraviolet light. In one or other embodiments of the present invention, the photoelectric sensor may use laser or other ordinary light. In particular, the light transceiver tubes 5 are all fixed on the base 1, and the paddle 4 is slidably connected to the slide bar 3 to receive the external paddle to trigger the sliding along the slide bar 3. The grating 6 is fixedly connected to the paddle 4, and modulates the light emitted by the light emitting tube 52 by sliding along the slide bar 3. The embodiment of the present invention adopts non-contact photoelectric triggering, which has simple structure, good hand feeling, no wear, long service life, convenient production and low cost.

[0029] Exemplarily, the grating 6 is provided with grating teeth, and the extension direction of the grating teeth is perpendicular to the extension direction of the slide bar 3. In the embodiment of the present invention, the reflectivity of each grating tooth of the grating 6 is different. When the grating 6 slides, the light is reflected by the grating teeth with different reflectivities, and reflected light with different intensities will be generated. Corresponding electric signals with different intensities are generated in the light receiving tube 51. The electric signal is converted into a digital signal by the ADC and then processed by the MCU, thereby triggering the electro-acoustic instrument to emit sounds of different intensities.

[0030] The triggering part further includes a reset member 2, which is used to restore the pick 4 to its initial position before the plucking after the finger is released, so as to simulate the return feeling of a real string. In one or other embodiments of the present invention, the reset member 2 is a spring reset member 2, which is sleeved on the slide bar 3.

[0031] In the embodiment of the present invention, the sound trigger device is installed at a position of the electro-acoustic instrument convenient for the user to play through the base 1. The base 1, the grid 6, the detector and the slide bar 3 in the sound trigger device are all installed inside the box of the electro-acoustic instrument. The detector is fixed on the base 1 and electrically connected to the electro-acoustic instrument. The pick 4 in the sound trigger device extends from the box of the electro-acoustic instrument and is higher than the cover of the electro-acoustic instrument, so that the user can press the pick 4.

[0032] Please refer to the attached Figure 2and attached Figure 3 , Figure 2 1 is a diagram showing the signal strength of the light receiving tube 51 when the grating 6 moves in the opposite direction according to the embodiment of the present invention. Figure 3 yes Figure 1 A is a schematic diagram of the partially enlarged structure of FIG. Figure 2 As shown, the horizontal axis is time and the vertical axis is pulse signal intensity. When the light of the light emitting tube 52 is irradiated onto the grating teeth, the light receiving tube 51 receives the light signal due to reflection, thereby showing a high level of the pulse signal in the figure. When the light of the light emitting tube 52 passes through the gap between the grating teeth, the light receiving tube 51 does not receive the reflected light signal, which is shown as a low level of the pulse signal in the figure.

[0033] In the embodiment of the present invention, the reflectivity of the first grating teeth 61 is higher than the reflectivity of the second grating teeth 62. Figure 2 and Figure 3 It can be known that when the grating 6 moves in the opposite direction, the intensity characteristics of the pulse signal of the light receiving tube 51 are modulated by the first grating tooth 61 and the second grating tooth 62. In the embodiment of the present invention, the movement of the grating 6 in the opposite direction refers to the movement of the paddle 4 being pressed along the slide bar 3 and the movement of being restored to the initial position by the reset member 2, and the movement of the grating 6 along with the paddle 4 being pressed is regarded as the positive movement of the grating along the slide bar. Since the reflectivity of the first grating tooth 61 and the second grating tooth 62 is different, the timing of the pulse signals of different intensities generated by the light receiving tube 51 will also be different, so that it can be judged whether the paddle 4 is in the state of being pressed or restored. In addition, when the width of the grating teeth and the spacing between the grating teeth remain unchanged, the speed of the movement of the paddle 4 will affect the width of the pulse signal, and the speed of the movement of the grating 6 can be obtained by further performing corresponding algorithm processing through the MCU.

[0034] Figure 2 (a) shows the variation characteristics of the pulse signal intensity of the light receiving tube 51 with time after being modulated by the first grid tooth 61 and the second grid tooth 62 when the grid plate 6 is in the pressed motion with the paddle 4. Figure 2 (b) shows the variation characteristics of the intensity of the pulse signal of the light receiving tube 51 over time when the grating 6 is in the recovery motion along with the paddle 4, after being reflected and modulated by the second grating tooth 62 and the first grating tooth 61 in succession. Since the first grating tooth 61 and the second grating tooth 62 of the grating 6 successively pass through a pair of optical transceiver tubes 5, and reflect the light emitted by the light emitting tube 52 one by one, the light receiving tube 51 will receive two light signals with different intensities. In the embodiment of the present invention, the first grating tooth 61 is coated with a coating with a higher reflectivity, so the intensity of the light reflected by the first grating tooth 61 will be significantly greater than the intensity of the light reflected by the second grating tooth 62, which is shown in the figure as the high level of the pulse signal of the first grating tooth 61 is higher than the high level of the pulse signal of the second grating tooth 62. Specifically, in Figure 2 In (a), the high level of the first pulse signal is higher than the high level of the second pulse signal. Figure 2 In (b), the second pulse signal high level is higher than the first pulse signal high level. Therefore, by analyzing the timing characteristics of the two pulse signal high levels, it is possible to know whether the grid 6 is in a state of being pressed or restored along with the paddle 4, thereby achieving the purpose of identifying the movement direction of the grid 6.

[0035] Please refer to the attached Figure 4 and attached Figure 5 , Figure 4 Schematic diagram of the structure of the grid plate 6 according to the embodiment of the present invention. Figure 5 1 is a diagram showing the signal strength of the light receiving tube 51 in different movement modes of the grating 6 according to an embodiment of the present invention. Figure 4 The width of each grating tooth and the gap between the grating teeth of the grating plate 6 shown in (a) and (b) are equal, but Figure 4 (a) The reflectivity of each grating tooth of the grating plate 6 is different. Figure 4 (b) The light transmittance of each grating tooth of the grating plate 6 is different. Figure 4 (c) shows a grating 6 in which the grating teeth have unequal widths and the spacing between the grating teeth increases (or decreases) along the direction of the slide bar 3 in one or other embodiments of the present invention. Figure 4 As shown in (a), the different oblique line densities on each grating tooth in the figure represent the coatings with different reflectivity sprayed, and the higher the oblique line density, the higher the reflectivity of the coating sprayed on the grating teeth. In an embodiment of the present invention, when the paddle 4 is in a pressed motion, the reflectivity of the grating teeth in the grating 6 that modulate the light of the optical transceiver tube 5 successively decreases. Since the width of the grating teeth and the spacing between the grating teeth are equal, when the grating 6 is in a pressed motion with the paddle 4, the high level of the pulse signal gradually decreases, and when the paddle 4 drives the grating 6 to move faster, the width of the pulse signal will become narrower. In addition, due to the different reflectivity of each grating tooth, the light signal participating in the modulation has a different height of the high level of the pulse signal in the signal strength diagram. Therefore, the timing characteristics of the high level of the pulse signal can further analyze and determine the positive and negative directions of the movement of the grating 6 and the speed of the movement.

[0036] Figure 5 (a) is the characteristic of the change of the pulse signal intensity over time when the grid piece 6 is in the pressed motion with the paddle 4. Figure 5 (b) is the characteristic of the change of the pulse signal intensity over time when the grid 6 is in a fast pressing motion with the paddle 4. Figure 5 (c) is the characteristic of the change of the pulse signal intensity over time when the grating plate 6 is pressed halfway with the paddle 4 and then restored by the reset element 2. In one or other embodiments of the present invention, when the paddle 4 is first pressed from the initial position at a certain speed until all four teeth of the grating plate 6 pass through the optical transceiver tube 5, the pulse signal intensity of the optical receiving tube 51 is as follows: Figure 5(a). When the user presses the paddle 4 from the initial position at a faster speed than the first time, until all the teeth of the grating 6 complete the reflection modulation of the light path between the optical transceiver 5, the pulse signal intensity of the optical receiver is as follows: Figure 5 (b). When the user makes the third move, the user presses the paddle 4 from the initial position to the first grid tooth 61 and the second grid tooth 62 at a speed equivalent to the first move, and after completing the modulation of the light between the optical transceiver tube 5, releases the paddle 4 so that the paddle 4 is restored to the initial position under the action of the reset member 2. The pulse signal strength of the optical receiving tube 51 is as shown in FIG. Figure 5 (c).

[0037] In the embodiment of the present invention, the first and third dialing speeds are both lower than the second dialing speed, so Figure 5 The high and low level widths of the pulse signals in (a) and (c) are both greater than Figure 5 (b) The high and low level width of the pulse signal. When the finger is pressed to the middle and released for the third time, the grating 6 is returned to the initial position together with the grating 4 by the reset element 2. The first grating tooth 61, the second grating tooth 62, the second grating tooth 62 and the first grating tooth 61 are sequentially used to reflect and modulate the light between the optical transceiver tube 5. Therefore Figure 5 (c) The pulse signal is high level, and it is not as Figure 5 (a) and (b) decrease successively, but the high level of the third pulse signal is kept consistent with the high level of the second pulse signal, and the high level of the fourth pulse signal is kept consistent with the high level of the first pulse signal.

[0038] Depend on Figure 5 It can be seen that when the grid 6 is in the process of being pressed along with the paddle 4, the pulse signal intensity characteristics generated are manifested as a series of high-to-low pulse signal high levels. The position of the grid 6 can be determined in real time by the intensity of the current pulse signal high level. Even if the grid 6 moves halfway and then turns back, the system can still accurately identify its movement trajectory. In addition, based on the width of the pulse signal, the speed of the grid 6 sliding along the slide bar can be determined, and different external plucking techniques can be further identified, such as "quick press", "slow press" or "slow press and release".

[0039] In one or other embodiments of the present invention, the reflectivity difference of the grid teeth can be achieved by spraying paints with different reflectivities, or by screen printing small dots with high reflectivity on the grid plate 6, and the reflectivity can be controlled by adjusting the dot density.

[0040] For example, screen printing technology is used to print small dots with high reflectivity on the surface of the grid sheet 6, and the density of the dots is gradually reduced to achieve the same modulation effect as spraying paints with different reflectivity. In addition, a hollow design can be used on the grid sheet 6, and the horizontal gradient of the overall light reflectivity can be achieved by adjusting the density change of the hollow. In one or other embodiments of the present invention, different surface treatment processes can also be used in different areas to produce different reflectivity changes, and the effective identification of the movement direction and speed of the grid sheet 6 can also be achieved.

[0041] Embodiment 2

[0042] In the embodiment of the present invention, the light transmittance of each grating tooth of the grating plate 6 is different, and the light emitted by the light emitting tube 52 is modulated by the trigger unit and received by the light receiving tube 51, and the modulation is transmission modulation. Specifically, in the embodiment of the present invention, since the light transmittance of each grating tooth of the grating plate 6 is different, when the light of the light emitting tube 52 passes through the grating teeth, the light intensity allowed to be transmitted is different, thereby realizing the transmission modulation of the light emitted by the light emitting tube 52 by the trigger unit.

[0043] Please refer to the attached Figure 6 , Figure 6 : is a schematic diagram of the structure of a sound trigger device for transmission modulation according to an embodiment of the present invention. As can be seen from the figure, the sound trigger device has only one pair of light transmitting and receiving tubes 5, the light emitting tube 52 and the light receiving tube 51 are located on both sides of the grating 6, and are respectively fixed on the bottom plate, and the two bottom plates of different planes are connected by a bracket to form a whole. The paddle 4 is slidably connected to the slide bar 3, and the grating 6 is fixedly connected to the paddle 4. When the user presses the paddle 4, due to the guidance of the slide bar 3, the paddle 4 will slide along the extension direction of the slide bar 3 with the grating 6. Since the light emitting tube 52 and the light receiving tube 51 are mounted on the movement path of the grating 6, when the grating 6 slides as the paddle 4 is pressed or is restored to the initial position by the reset member 2, the grating teeth will transmittance modulate the light emitted by the light emitting tube 52, thereby causing the electro-acoustic instrument to produce sound.

[0044] Please refer to the attached Figure 7 , Figure 7 1 is a diagram showing the signal strength of the light receiving tube 51 after transmission modulation according to an embodiment of the present invention. Figure 4 (b), the density of dots on the grating teeth in the figure indicates the transmittance of the grating teeth. The greater the density of dots, the greater the transmittance of the grating teeth. When the grating plate 6 is in a pressed motion with the paddle 4, the grating tooth with the largest transmittance will first transmit and modulate the light emitted by the light emitting tube 52, and the light intensity of the light receiving tube 51 will be reduced. Figure 7 The pulse signal is shown as low level.

[0045] Depend on Figure 7It can be seen that when the grating 6 is just pressed with the paddle 4, the grating teeth have not yet blocked the light between the optical transceiver tubes 5, so the pulse signal of the light receiving tube 51 is at a high level. When the paddle 4 continues to be pressed, the light between the optical transceiver tubes 5 is first blocked. Figure 4 The grating tooth with the largest dot density in (b), that is, the grating tooth with the largest light transmittance, will show the low level of the first pulse signal in the signal strength diagram. The grating 6 continues to slide along the extension direction of the slide bar 3, and the light between the optical transceiver tubes 5 is blocked by the grating teeth with gradually decreasing light transmittance, thereby showing a gradually decreasing low level of the pulse signal in the signal strength diagram. When the gap between the grating teeth passes between the optical transceiver tubes 5, since the light between the optical transceiver tubes 5 is not blocked, it is shown as a high level between two low levels of the pulse signal in the signal strength diagram. Furthermore, by analyzing the width of the pulse signal on the time axis, it is possible to determine the speed at which the grating 6 slides along the slide bar 3, and by analyzing the timing characteristics of the low levels of each pulse signal, it is possible to identify the direction in which the grating 6 slides along the slide bar 3.

[0046] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A sound triggering device for an electro-acoustic musical instrument, characterized in that: The sound triggering device comprises: A base having a slide bar; A triggering part, including a paddle and a grid, is sleeved on the slide bar and is used to convert the external paddle motion applied to the paddle into the sliding motion of the grid along the slide bar; and The detector is electrically connected to the electro-acoustic instrument and is used to detect the positive and negative directions and the speed of the grid moving along the slide bar and convert it into an electrical signal so that the electro-acoustic instrument produces sound.

2. The sound triggering device according to claim 1, characterized in that: The detector includes one and only one pair of light transceiver tubes, which include a light emitting tube and a light receiving tube. The light emitted by the light emitting tube is modulated by the trigger unit and received by the light receiving tube; the modulation includes reflection modulation and transmission modulation.

3. The sound triggering device according to claim 2, characterized in that: The paddle is slidably connected to the slide bar and is used to receive the external paddle movement to trigger the sliding along the slide bar; The grating is fixedly connected to the paddle and modulates the light emitted by the light emitting tube by sliding along the slide bar.

4. The sound triggering device according to claim 3, characterized in that: The grid plate is provided with grid teeth, and the extending direction of the grid teeth is perpendicular to the extending direction of the sliding rod.

5. The sound triggering device according to claim 4, characterized in that: The spacing between the teeth of the grid plate gradually increases or decreases along the direction of the sliding rod.

6. The sound triggering device according to claim 4, characterized in that: The reflectivity of each grating tooth of the grating plate is different.

7. The sound triggering device according to claim 1, characterized in that: The triggering part also includes a reset member, which is used to restore the paddle to an initial position before being paddled.

8. The sound triggering device according to claim 2, characterized in that: The light emitted by the light emitting tube is infrared light.

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