Sound triggering device for electroacoustic musical instrument

Abstract

The utility model discloses a sound triggering device for an electroacoustic musical instrument, which belongs to the control field of the electroacoustic musical instrument and comprises a base, a sound triggering device and a sound generating device, 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 utility model, through the mechanical translation of the plectrum and the combination of the grid sheet and the detector, the device can realize the detection of the positive and negative directions and the movement speed of the grid sheet along the sliding rod, and the problems of high cost, large abrasion and complex system of the traditional musical instrument sound triggering device are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electric musical instrument control, concretely relates to a sound trigger device for electric musical instrument. BACKGROUND

[0002] The performance of traditional stringed instruments usually requires the performer to press and pluck the strings at the same time. For beginners, this coordination requirement is high and the learning difficulty is great. In order to reduce the performance threshold, new electronic musical instruments have emerged. This type of electronic musical instrument presets a music sequence and is equipped with an instrument segment selector, so that the user only needs to press with a single finger to achieve the effect of multi-finger pressing and string plucking in traditional musical instruments. In addition, the electronic musical instrument is also provided with a music performance trigger, and the user can trigger the music performance by applying different force to pluck, thereby simulating the plucking trigger effect of traditional stringed instruments.

[0003] In the prior art, Chinese utility model patent CN221261950U discloses a stringless guitar string sweeping switch, which includes a chip built into the body of the guitar, and a pair of photoelectric switches controlled by the chip, which are used to trigger the chip to control the stringless guitar to produce sound. However, the signal receiving and transmitting hole of the pair of photoelectric switches and the string sweeping switch are both arranged outside the body of the guitar, and the triggering depends on the blocking of the user's finger at the position of the string sweeping switch to achieve, completely abandoning the fixed plectrum or the physical blocking piece performing the function of the plectrum. Although this design reduces the mechanical parts, it greatly increases the risk of accidental touch, affecting the accuracy and stability of the performance. SUMMARY

[0004] Based on this, the technical scheme of the utility model provides a sound trigger device, which realizes the detection of the movement direction and speed of the grid along the slide rod through the combination of the plectrum, the grid and the detector, solving the problems of high cost, large wear and complex system of traditional musical instrument sound trigger devices.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a sound trigger device for electric musical instrument, the sound trigger device includes: base, be equipped with slide rod;Trigger part, including plectrum and grid, cover set on the slide rod, for converting the external plucking applied to the plectrum into the sliding of the grid along the slide rod;And detector, with electric musical instrument electric connection, for detecting the grid along the slide rod in the positive and negative direction and the movement speed, and convert into electric signal to make the electric musical instrument produce sound.

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

[0007] Further, the dial piece is slidingly connected to the slide rod, and is used for receiving external dialing to trigger sliding along the slide rod; the grid piece is fixedly connected to the dial piece, and light emitted by the light emitting tube is modulated by sliding along the slide rod.

[0008] Further, the grid piece is provided with grid teeth, and the extending direction of the grid teeth is perpendicular to the extending direction of the slide rod.

[0009] Preferably, the interval between the grid teeth of the grid piece is gradually increased or decreased along the slide rod.

[0010] In particular, the reflectivity of the grid teeth of the grid piece is not the same.

[0011] Further, the trigger part further comprises a reset member, which is used for restoring the dial piece to the initial position before dialing.

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

[0013] The beneficial effects achieved by the above technical solutions are:

[0014] 1) The mechanical straight sliding trigger of the dial piece triggers the electric sound musical instrument, so that the performance of the electric sound musical instrument is closer to the string plucking feeling of the traditional musical instrument, the fun of performance is experienced while preventing the musical instrument from disturbing people, and beginners are more willing to improve the performance skill through the practice of the electric sound musical instrument.

[0015] 2) Through reasonable design of the shape and reflectivity of the grid teeth of the grid piece, the sound trigger device provided by the utility model realizes detection of the positive and negative directions and the movement speed of the grid piece by using only one pair of photoelectric transceiver, simplifies the system, reduces the production cost, and saves the limited internal space of the musical instrument. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the sound trigger device for reflection modulation of an embodiment of the utility model.

[0017] Figure 2 is a light receiving tube signal strength diagram of the grid piece moving in the opposite direction.

[0018] Figure 3 is Figure 1 is a partially enlarged structural schematic view of A in FIG.

[0019] Figure 4 is a structural schematic view of the grid piece of an embodiment of the utility model.

[0020] Figure 5 is a light receiving tube signal strength diagram of different movement modes of the grid piece of an embodiment of the utility model.

[0021] Figure 6 is a structure schematic view of the sound trigger device of the embodiment of the utility model for transmitting modulation.

[0022] Figure 7 is the light receiving tube signal intensity diagram of the embodiment of the utility model for transmitting modulation.

[0023] The various reference signs in the drawings represent:

[0024] 1, base; 2, reset piece; 3, slide bar; 4, paddle; 5, optical transceiver; 6, grid piece; 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 utility model more clear and obvious, the specific implementation of the utility model is described in further detail below by combining with examples. It should be understood that the examples described herein are only used to explain the utility model, but not used to limit the scope of the utility model.

[0026] Example one

[0027] The sound trigger device of the embodiment of the utility model includes base 1, trigger part and detector. The base 1 is provided with slide bar 3. The trigger part includes paddle 4 and grid piece 6, and the trigger part is wholly sleeved on the slide bar 3, which is used to convert the external poking applied on the paddle 4 into the translational motion of the grid piece 6 along the slide bar 3. The detector is electrically connected with the electric acoustic musical instrument, which is used to detect the movement direction and speed of the grid piece 6 along the slide bar 3, and convert into electric signal to make the electric acoustic musical instrument produce sound.

[0028] Please refer to the attached Figure 1 , Figure 1Is the structure schematic view of the sound trigger device of the embodiment of the utility model. In the embodiment of the utility model, the detector includes photoelectric sensor and circuit board, wherein, the photoelectric sensor includes a pair of optical transceiver 5, and in the embodiment of the utility model, the photoelectric sensor only includes a pair of optical transceiver 5. Optical transceiver 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 part and is received by the light receiving tube 51, and in the embodiment of the utility model, the modulation of the light emitting tube 52 by the trigger part is reflection modulation. In one or other embodiments of the utility model, the modulation can be transmission modulation. In particular, in the embodiment of the utility model, the light emitted by the light emitting tube 52 is infrared light. In one or other embodiments of the utility model, the photoelectric sensor can also use other waveband light, such as far infrared light, visible light, microwave or ultraviolet light. In one or other embodiments of the utility model, the photoelectric sensor can use laser or other ordinary light. In particular, the optical transceiver 5 is fixed on the base 1, the paddle 4 is slidingly connected to the slide rod 3, and is used for receiving the external dialing to trigger the sliding along the slide rod 3. The grid sheet 6 is fixedly connected to the paddle 4, and the light emitted by the light emitting tube 52 is modulated by sliding along the slide rod 3. The embodiment of the utility model adopts non-contact photoelectric trigger, and has the advantages of simple structure, good hand feeling, no wear, super-long service life, convenient production and low cost.

[0029] Exemplarily, the grid sheet 6 is provided with grid teeth, and the extension direction of the grid teeth is perpendicular to the extension direction of the slide rod 3. In the embodiment of the utility model, the reflectivity of each grid tooth of the grid sheet 6 is different. When the grid sheet 6 slides, the light is reflected by the grid teeth with different reflectivity, different intensity of reflected light is generated, different intensity of electric signals corresponding to the reflected light is generated in the light receiving tube 51, the electric signals are converted into digital signals by ADC, and the digital signals are processed by the MCU, so that the electric musical instrument generates different intensity of sound.

[0030] The trigger part further includes a reset member 2, which is used for restoring the paddle 4 to the initial position before dialing after the finger is released, so as to simulate the real string returning feeling. In one or other embodiments of the utility model, the reset member 2 is a spring reset member 2, and the spring reset member 2 is sleeved on the slide rod 3.

[0031] In the embodiment of the utility model, the sound trigger device is installed on the electric musical instrument at a position convenient for user playing through the base 1. The base 1, the grid sheet 6, the detector and the slide rod 3 in the sound trigger device are all installed inside the box body of the electric musical instrument, the detector is fixed on the base 1 and is electrically connected with the electric musical instrument. The paddle 4 in the sound trigger device extends out of the box body of the electric musical instrument and is higher than the cover plate of the electric musical instrument, so as to facilitate the user to press the paddle 4.

[0032] Please refer to the accompanying drawings Figure 2 and the accompanying drawings Figure 3 , Figure 2 is the signal intensity diagram of the light receiving tube 51 when the grid sheet 6 moves in the opposite direction. Figure 3 is Figure 1 the structure diagram of the partial amplification of A in the middle. As Figure 2 indicated, the horizontal axis is time, and the vertical axis is the intensity of the pulse signal. When the light emitted by the light emitting tube 52 irradiates on the grid tooth, due to the reflection effect, the light receiving tube 51 receives the light signal, thereby showing the high level of the pulse signal in the figure. When the light emitted by the light emitting tube 52 passes through the gap between the grid teeth, the light receiving tube 51 cannot receive the reflected light signal, which is shown as the low level of the pulse signal in the figure.

[0033] In the embodiment of the utility model, the reflectivity of the first grid tooth 61 is higher than the reflectivity of the second grid tooth 62. As Figure 2 and Figure 3 can be seen, when the grid sheet 6 moves in the opposite direction, the pulse signal intensity characteristics of the light receiving tube 51 are modulated by the first grid tooth 61 and the second grid tooth 62. In the embodiment of the utility model, the movement of the grid sheet 6 in the opposite direction refers to the movement of the dial sheet 4 being pressed along the slide rod 3 and the movement of the dial sheet 4 being restored to the initial position by the restoring member 2, and the movement of the grid sheet 6 being pressed along with the dial sheet 4 is regarded as the forward movement of the grid sheet along the slide rod. Due to the different reflectivity of the first grid tooth 61 and the second grid tooth 62, the time sequence of the different intensity pulse signals generated by the light receiving tube 51 will also be different, so that it can be judged that the dial sheet 4 is in the pressed state or the restored movement. In addition, under the condition that the width of the grid tooth and the spacing between the grid teeth are constant, the speed of the dial sheet 4 will affect the width of the pulse signal, and further processing by the MCU according to the corresponding algorithm can obtain the speed of the movement of the grid sheet 6.

[0034] Figure 2 (a) represents the change characteristics of the pulse signal intensity of the light receiving tube 51 with time when the grid sheet 6 moves along with the dial sheet 4 in the pressed state, and the light emitted by the light emitting tube 52 is modulated by the first grid tooth 61 and the second grid tooth 62 in sequence. Figure 2 (b) represents the change characteristics of the pulse signal intensity of the light receiving tube 51 with time when the grid sheet 6 moves along with the dial sheet 4 in the restored state, and the light emitted by the light emitting tube 52 is modulated by the second grid tooth 62 and the first grid tooth 61 in sequence. Since the first grid tooth 61 and the second grid tooth 62 of the grid sheet 6 pass through a pair of light receiving and transmitting tubes 5 in sequence, the light emitted by the light emitting tube 52 is reflected one by one, and two light signals with different intensities will be received by the light receiving tube 51. In the embodiment of the utility model, the first grid tooth 61 is coated with a coating with higher reflectivity, so the light intensity of the light reflected by the first grid tooth 61 will be significantly greater than the light intensity of the light reflected by the second grid tooth 62, which is shown in the figure as the high level of the pulse signal of the first grid tooth 61 being higher than the high level of the pulse signal of the second grid tooth 62. Specifically, in Figure 2In (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 high level of the second pulse signal is higher than that of the first pulse signal. Therefore, by analyzing the timing characteristics of the high levels of the two pulse signals, it is possible to determine whether the grating 6 is being pressed or being released along with the lever 4, thereby achieving the purpose of identifying the direction of movement of the grating 6.

[0035] Please see the appendix Figure 4 and attached Figure 5 , Figure 4 This is a schematic diagram of the structure of the grid plate 6 in an embodiment of the present invention. Figure 5 This is a signal intensity diagram of the optical receiver 51 under different motion modes of the grating 6 in this embodiment of the present invention. Figure 4 In (a) and (b), the width of each tooth and the gap between the teeth of the grid plate 6 are equal, but... Figure 4 (a) The reflectivity of each tooth in grating plate 6 is different. Figure 4 (b) The transmittance of each tooth in the grating plate 6 is different. Figure 4 (c) Shown is a grid plate 6 in one or other embodiments of this utility model, wherein the width of the grid teeth is not equal and the spacing between the grid teeth gradually increases (or decreases) along the direction of the slide bar 3. In the embodiments of this utility model, the grid plate 6 used is as shown in the attached figure. Figure 4 As shown in (a), the different density of diagonal lines on each grating tooth in the figure represents the coating with different reflectivity. The higher the density of diagonal lines, the higher the reflectivity of the coating sprayed on the grating tooth. In this embodiment of the present invention, when the lever 4 is in the pressed movement, the reflectivity of the grating teeth in the grating 6 that modulate the light from the optical transceiver tube 5 decreases sequentially. Since the width and spacing of the grating teeth are equal, when the grating 6 is in the pressed movement with the lever 4, the high level of the pulse signal gradually decreases. When the lever 4 drives the grating 6 to move faster, the width of the pulse signal will narrow. In addition, since the reflectivity of each grating tooth is different, the corresponding pulse signal high level height in the signal intensity diagram is also different. Therefore, based on the timing characteristics of the high level of the pulse signal, the forward and reverse directions and the speed of the movement of the grating 6 can be further analyzed and determined.

[0036] Figure 5 (a) is the characteristic of the pulse signal intensity of the grating 6 changing with time when the grating 4 is in the pressed motion. Figure 5 (b) is the characteristic of the pulse signal intensity of the grating 6 changing with time when the lever 4 is in a rapid pressing motion. Figure 5(c) is the change characteristic of the pulse signal intensity of the grid sheet 6 with the pressing sheet 4 being pressed halfway and then being restored by the restoring member 2 over time. In one or other embodiments of the present application, when the dialing is performed for the first time, the user presses the dialing sheet 4 from the initial position at a certain speed until all the four grid teeth of the grid sheet 6 pass through the light transceiver tube 5, and the pulse signal intensity of the light receiving tube 51 is as shown in Figure 5 (a). When the dialing is performed for the second time, the user presses the dialing sheet 4 from the initial position at a speed greater than that in the first dialing until all the grid teeth of the grid sheet 6 complete the reflection modulation of the light path between the light transceiver tube 5, and the pulse signal intensity of the light receiving tube is as shown in Figure 5 (b). When the dialing is performed for the third time, the user presses the dialing sheet 4 from the initial position at a speed corresponding to that in the first dialing until the first grid tooth 61 and the second grid tooth 62 complete the modulation of the light between the light transceiver tube 5, and then releases the dialing sheet 4 so that the dialing sheet 4 is restored to the initial position under the action of the restoring member 2, and the pulse signal intensity of the light receiving tube 51 is as shown in Figure 5 (c).

[0037] In the embodiments of the present application, the first dialing speed and the third dialing speed are less than the second dialing speed, so Figure 5 the high and low level width of the pulse signal in (a) and (c) is greater than Figure 5 the high and low level width of the pulse signal in (b). When the dialing is performed for the third time, the finger is pressed halfway and released so that the grid sheet 6 is returned to the initial position together with the dialing sheet 4 under the action of the restoring member 2, and the grid teeth that modulate the light between the light transceiver tube 5 in turn are the first grid tooth 61, the second grid tooth 62, the second grid tooth 62 and the first grid tooth 61, so Figure 5 the high level of the pulse signal in (c) does not decrease in turn as shown in Figure 5 (a) and (b), but remains the same height as the second pulse signal high level at the third pulse signal high level, and remains the same height as the first pulse signal high level at the fourth pulse signal high level.

[0038] As Figure 6 can be seen, when the grid sheet 6 is pressed and moved together with the dialing sheet 4, the pulse signal intensity features a series of high-to-low pulse signal high levels. Through the intensity of the current pulse signal high level, the position of the grid sheet 6 can be determined in real time, and even if the grid sheet 6 is folded back after moving halfway, the system can still accurately identify the movement trajectory. In addition, according to the width of the pulse signal, the speed of the grid sheet 6 along the slide rod can be determined, and different external dialing techniques such as "fast pressing", "slow pressing" or "slow pressing and then releasing" can be further identified.

[0039] In one or other embodiments of the present application, the reflectivity difference of the grid teeth can be realized by spraying paint with different reflectivity, or by screen printing, printing small dots with high reflectivity on the grid sheet 6, and adjusting the dot density to control the reflectivity.

[0040] Exemplarily, the screen printing technology is used to print small dots with high reflectivity on the surface of the grid sheet 6, and the dot density is gradually reduced to achieve the same modulation effect as spraying paint with different reflectivity. In addition, a hollow design can also be used on the grid sheet 6, and the overall light reflectivity can be gradually changed by adjusting the density of the hollows. In one or other embodiments of the present application, different surface treatment processes can also be used in different areas to produce different reflectivity changes, and the movement direction and speed of the grid sheet 6 can also be effectively identified.

[0041] Embodiment two

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

[0043] Please refer to the accompanying Figure 6 , Figure 7 is a structure diagram of the sound trigger device for transmission modulation according to the embodiment of the present application. As shown in the figure, the sound trigger device has and only has one pair of light transceiver tubes 5, the light emitting tube 52 and the light receiving tube 51 are located on both sides of the grid sheet 6 and are fixed on the bottom plate, and the two bottom plates with different planes are connected to form a whole through the support. The paddle 4 is slidingly connected to the slide rod 3, and the grid sheet 6 is fixedly connected to the paddle 4. When the user presses the paddle 4, the paddle 4 will slide along the extension direction of the slide rod 3 with the grid sheet 6 due to the guidance of the slide rod 3. Since the light emitting tube 52 and the light receiving tube 51 are erected on the movement path of the grid sheet 6, when the grid sheet 6 slides with the paddle 4 being pressed or is restored to the initial position by the restoring member 2, the grid teeth will transmit the light emitted by the light emitting tube 52, thereby making the electric acoustic musical instrument produce sound.

[0044] Please refer to the accompanying Figure 7 , Figure 4 is a signal intensity diagram of the light receiving tube 51 after transmission modulation according to the embodiment of the present application. The grid sheet 6 used in the embodiment of the present application is shown in the accompanying Figure 7(b), the dot density on the grid teeth represents the light transmittance of the grid teeth, and the greater the dot density, the greater the light transmittance of the grid teeth. When the grid piece 6 is pressed with the dial piece 4, a grid tooth with the greatest light transmittance will first transmit the light emitted by the light emitting tube 52, and the light intensity of the light receiving tube 51 will be reduced, and the pulse signal of the light receiving tube 51 will be reduced. Figure 7 The pulse signal is low in level.

[0045] As can be seen from Figure 4 When the dial piece 4 is pressed, the grid teeth do not block the light between the light emitting and receiving tubes 5, so the pulse signal of the light receiving tube 51 is high. When the dial piece 4 is continuously pressed, the grid tooth that first blocks the light between the light emitting and receiving tubes 5 is ​ The grid tooth with the greatest light transmittance in (b) is the grid tooth with the greatest light transmittance, and the first pulse signal low in level is displayed in the signal intensity diagram. The grid piece 6 continues to slide along the extension direction of the slide rod 3, and the light between the light emitting and receiving tubes 5 is blocked by the grid teeth with gradually reduced light transmittance, so that the pulse signal low in level is gradually reduced in the signal intensity diagram. When the gap between the grid teeth passes through the light emitting and receiving tubes 5, the light between the light emitting and receiving tubes 5 is not blocked, and the high level between the two pulse signal low levels is displayed in the signal intensity diagram. Further, by analyzing the width of the pulse signal on the time axis, the speed of the grid piece 6 sliding along the slide rod 3 can be determined, and by analyzing the time sequence characteristics of each pulse signal low level, the direction of the grid piece 6 sliding along the slide rod 3 can be identified.

[0046] Finally, it should be pointed out that the above specific embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A sound triggering device for an electro-acoustic musical instrument, characterized in that, The sound trigger device comprises: a base provided with a slide rod; a trigger part comprising a push piece and a fence piece, which is sleeved on the slide rod and is used for converting external pushing applied on the push piece into sliding of the fence piece along the slide rod; and a detector electrically connected with the electric sound instrument and used for detecting the forward and reverse directions and the movement speed of the fence piece along the slide rod and converting the same into an electric signal to make the electric sound instrument produce sound.

2. The sound-triggered device of claim 1, wherein, The detector comprises only one pair of optical transceiver tubes, the optical transceiver tubes comprise one optical emitting tube and one optical receiving tube, the light emitted by the optical emitting tube is modulated by the trigger part and is received by the optical receiving tube, the modulation comprises reflection modulation and transmission modulation.

3. The sound trigger device according to claim 2, wherein the push piece is slidingly connected with the slide rod and is used for receiving the external pushing to trigger the sliding along the slide rod; the fence piece is fixedly connected with the push piece and modulates the light emitted by the optical emitting tube through the sliding along the slide rod.

4. The sound trigger device according to claim 3, wherein the fence piece is provided with fence teeth, the extension direction of the fence teeth is perpendicular to the extension direction of the slide rod.

5. The sound trigger device of claim 4, wherein, The interval between the fence teeth of the fence piece is gradually increased or decreased along the slide rod.

6. The sound-triggered device of claim 4, wherein, The reflectivity of the fence teeth of the fence piece is different.

7. The sound-triggered device of claim 1, wherein, The trigger part further comprises a reset member, which is used for restoring the push piece to the initial position before pushing.

8. The sound-activated device of claim 2, wherein, The light emitted by the optical emitting tube is infrared light.

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