JPS6243355Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This utility model replaces the action of plucking and pressing the guitar strings with a mechanical device, instead of playing the guitar directly by hand. The purpose is to have the player perform. Conventionally, devices for playing guitar sounds via a keyboard have been pseudo-sounds that are electronically synthesized guitar sounds. For this reason, anyone who could play the keyboard could enjoy the tones of the guitar, but they could not enjoy the raw sound of the guitar itself. This project was devised in response to this request, and to explain the present performance device with reference to the drawings, it is as follows.
Figures 1 and 2 are of this device.

[Formula] To describe the basic operation of this project, the guitar 1 is a device for plucking the strings by emitting an electric signal by pressing the key 2 of a five-stage keyboard attached to the mount 16; It drives a device that suppresses the strings and produces sound. Among the playing devices of the present invention, the device for plucking strings will be described below. Figure 3 is a diagram showing the principle of vibration when the claw 26 flicks the string 24, and the string 24 is a cross section of the string from point A.
Push down with the claw 26 until point A', and the tip of the claw
After passing point A', it separates from the string and vibrates up and down.
3a, 3b, 3c, 3d, respectively, when the movement of the tip of the nail is parallelogram, rectangle, circle, or ellipse.
As shown in the figure, the present invention adopts the oval shape shown in the 3D figure, and the details are shown in Figures 4 and 5. Conventional devices that flick the claws have the disadvantage that when performing box-shaped movements as shown in Figures 3a and 3b, mechanical noise is generated when the trajectory of the claws changes direction. 6th,
FIG. 7 is a front view and a side view of the mechanism that moves as shown in FIG.
and the spring plate 38, the slide lever 3
By moving 3 up and down, the tip of the claw moves like a parallelogram, but when the pin 35 is returned upward by the coil spring 36, it makes a mechanical sound. In addition, when the claw moves in a circular motion, there is no mechanical sound due to rotational motion, but 3c
Since the width B of the movement shown in the figure is large, the claw easily hits the adjacent string. Figures 8 and 9 are front and side views of a conventional mechanism that moves in a circular motion, and the pawl 43 is in the same circle as the center of the pin 44 implanted in the disc 41 that moves synchronously through a timing belt 47. exercise. By making the motion of the tip of the claw elliptical, it is possible to eliminate the problems of the conventional method, such as the generation of mechanical noise and the tendency for the claw to hit the adjacent string. FIG. 4 is a front view of the string plucking device, and FIG. 5 is a side view, in which 24 represents the strings of a guitar. To explain the operation of the pawl 29, a bearing 23a is implanted in the plate 23, and a disc 2 screwed to the shaft 32.
7, and the pawl 29 form a rotating pair with the pin 28, and the elongated hole provided on the pawl rotates and slides with the shaft pin 30. By rotating the shaft 32, which is the center of the disc, once, the tip of the claw moves in an elliptical shape as shown in the figure, causing the string to vibrate. Figures 10 and 11 are enlarged views of the string plucking device, showing a front view and a side view, respectively.
7, and six one-rotation stop motors 48 for rotating the disc 27 are arranged in a staggered pattern and secured with screws. The circumference of the disk 27 is a gear that meshes with a timing belt 49, and a gear 48a for the timing belt is attached to a motor 48, and as the motor 48 rotates, the pawl 29 flicks the string 24. . (A one-rotation stop motor is a motor that rotates 360 degrees and stops when a pulse drive signal is applied to the motor.) Now, returning to Figures 1 and 2, we will explain the mechanism for changing the tone and strength of the guitar. 23, is screwed to the retaining plate 4, and the bearing 2 is attached to the retaining plate 4.
2 is screwed and rotates and slides on the shaft 20. The holding plate 4 is operated by a motor 5 fixed to the backboard 3 shown in FIGS. 1 and 2, by rotating the motor in the forward and reverse directions with foot switches 17 and 18 via a chain 7 that engages with sprockets 8 and 21. , the string plucking device moves from side to side. With the above operation, the timbre of the guitar sound can be changed by varying the location where the strings are plucked. On the other hand, the retaining plate 4 always maintains the eccentric shaft 1 about the shaft 20 by means of a tension spring 14 hung on the bearing 22.
3, is pressed against. By stepping on the foot switch 19 and rotating the motor 11 fixed to the frame 16, the eccentric shaft 13 is rotated (first
It is also shown in Figure 1. ) The strength of the guitar sound can be changed by moving the holding plate 4 back and forth to change the distance of the claws from the strings. The string-plucking claw that performs the above operations is installed inside the six-string splitting device. Next, to explain the device that presses the strings, the first
Figures 2 and 13 are enlarged views of the device, and are a front view and a side view, respectively.The iron core 51 of the plunger 50 is designed to soften the impact when the string 24 stretched on the arm 53 of the guitar is pressed down. A cushion material 52 is wound with a thread, and when the plunger 50 is energized, the iron core 51 presses the string, and when the energization is stopped, the spring 54 returns to the original position. The iron core and plunger for holding down the strings are screwed to the holding plate 15 in the same number as the number of frets on the guitar. FIG. 14 is a diagram showing the relationship between the driving units and keys of the string plucking device and string pressing device described above, and the pulse motor drive unit that drives the string plucking device by pressing the key, and the string pressing device. The plunger drive unit that drives the pressing device is operated at the same time to produce sound. Figure 15 shows plungers on the same string.
In an operation chart showing the operation of RX and RY, the vertical axis represents the equipment and the horizontal axis represents the operation time. When keys X and Y are pressed, △tx and △ty, respectively, the signal △tx of the one pressed earlier is The device Z that plucks the receiving string works for tz time and plucks the string. Plunger corresponding to key X at the same time
RX, is driven and when the next signal △ty on the same string is input, the string plucking device Z is driven and at the same time
RX is released, RY is activated, and RX and RY perform a so-called see-saw movement. In this device, electric circuits that operate as shown in FIG. 15 are prepared for six strings. Figures 16 and 17 are diagrams showing the frets of a guitar and the keys of a five-tier keyboard.To explain the relationship between the frets and keys, in Figure 16, the horizontal axis shows the 1W notes in order from the lowest note on the guitar string. ,from
The strings up to 6W are represented, and the vertical axis represents the frets. The sounds when pressing between each fret with your fingers are marked with the symbols M, _H , _{G , A} , C, _C.
13 represents the sound of an open string, which is produced without pressing the string with your fingers. Also, symbols such as Hua # ₂₄ represent a semitone higher than the Hua note, and the 2 of 24 is placed on the second keyboard, and the 4 is the fourth octave of the Hua # note, which is the lowest guitar note. This is the meaning of the sound that corresponds to. The keyboard in the first row of Figure 17 has the 1W string M ₁₁ , G to G, 2W string A ₁₁ , D to C, and 3W string shown in the thick line starting from the row.
Arrange the notes ₁₁ , 4W string _G12 , 5W string _B12 , 5W string M13, 6W string _M13 , and _C14 . The second row shows the thick lines originating from the row and the 1W string _A21 shown in the row thick line, C#, 2W string _L21 , F21, _F22 of the 3W string, A#,
4W strings ₂₂ , 5W strings _M23 to ₂₄ ,
Place the sounds up to. The third row shows the thick lines originating from the row, and the 1W string LE ₃₁ shown in the row thick line, from the FA #, from the 2W string SO ₃₂ , from the A #, from the 3W string SY ₃₂ .
Arrange the notes from #, 4W string _M33 , to _R33 ,.
The fourth row shows the thick line originating from the row, the 1W string _S42 shown in the row thick line, the A #, the 2W string _S42 , and the
Arrange the notes from #, 3W string _M43 , to _A43 ,.
The fifth row has _shi52 , _mi53 , and the sound.

[Brief explanation of the drawing]

Figures 1 and 2 are a front view and a side view of the performance device. 1 is a guitar, 2 is a keyboard, 3 is a backboard, 4 is a holding plate, 5 is a motor, 6 is a stand 7 is a chain, 8 is a sprocket, 9 is a stand 10 is a shaft mounting plate, 11 is a motor, 12 is a bearing,
13 is an eccentric shaft, 14 is a tension spring, 15 is a plunger mounting plate, 16 is a frame, 17.18.
19. A foot switch 20 is a shaft, 21 is a sprocket, 22 is a bearing, and 23 is a pawl mounting plate. Figure 3 is an explanatory diagram of the principle of repelling strings, 24 is a string,
26 is a nail. Figures 4 and 5 are a front view and a side view of the pawl repelling device, in which 25 is a timing belt sprocket, 23 is a pawl mounting plate, 27 is a disc, 28 is a shaft pin, 29 is a pawl 30 is a shaft pin, 31 is a stud, 32 is a shaft, and 23a is a bearing. Figures 6 and 7 are mechanical diagrams of a conventional box-shaped claw, Figure 6 is a front view, Figure 7 is a side view, 33 is a slide lever,
34 is a claw, 35 is a pin, 35a is a shaft pin, 36 is a spring, 37 is a cam, 38 is a plate spring,
39 is a holding plate, and 40 is a cam mounting plate. Figures 8 and 9 are mechanical diagrams of conventional pawls that move in a circular motion, with 41 and 42 representing sprockets, 43 pawls, and 4
4 is a shaft pin 45 is a holding plate, 46 is a shaft, and 47 is a timing belt. Figures 10 and 11 are enlarged views of the string plucking device; Figure 10 is a front view, Figure 11 is a side view, 48 is a motor, 48a is a gear, and 49 is a timing belt. Figures 12 and 13 are enlarged views of the device that presses the strings.
12 is a front view, FIG. 13 is a side view, 50 is a plunger, 51 is an iron core, 52 is a cushion, 5
3 is the guitar arm, 54 is the compression spring, and 55 is the stopper. FIG. 14 is a diagram showing the operation of the drive unit. Figure 15 shows
Operation flowchart. Figure 16 is a musical scale diagram using guitar strings and frets, from 1W to 6W is the string, and from is the fret. Figure 17 shows a five-tier keyboard.

Claims (1)

[Scope of utility model registration request] A guitar, a fixing device for fixing the guitar, a plucking device for plucking the strings of the guitar with an elliptical motion, a string pressing device for pressing each fret of the guitar independently, and a plucking device for each fret of the guitar. It is characterized by comprising a keyboard consisting of five steps having a musical scale, and a control device that organically controls a string-playing device and a string-pressing device so that when a player operates the keyboard, a guitar sound of that scale is generated. A guitar playing device.