JPS6362756B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tremolo mechanism for a guitar that temporarily and gradually weakens the tension of strings during a performance to apply a tremolo.

(Prior Art) Conventionally, as shown in Fig. 2, a tremolo mechanism for a guitar has an end plate 4, which has a bridge 1 and a locking part 3 of a string 2 attached integrally, and is rotatable about a fulcrum 5. There is a FENDER type tremolo mechanism that gradually loosens the tension on the strings 2 and applies tremolo by rotating the end plate 4 by pushing the tremolo arm 7 against the biasing force of the spring 6.

In this case, as shown in Figure 3, the first string 2-1
The bridge 1 is tilted so that the 6th string 2-6 is slightly longer. That is, when string 2 is pressed, the first string 2-1, which has a thin string, touches the fingerboard 8 at the position where it is pressed even if it is pressed lightly, but the 6th string, which has a thick string, touches the fingerboard 8 at the pressed position.
Strings 2-6 must be pressed strongly, and since they touch the fingerboard 8 in a round shape from the pressed position, the strings are touched in a round shape to compensate for the shortening of the length of the strings at each scale. Bridge 1
Because the tremolo arm 7 is pushed, the 6th string 2-6 has more slack than the 1st string 2-1, and the 1st string 2-1, which has less slack, has a smaller wire diameter. Because it is thin, it has a high elongation rate and is less sensitive to scale changes with respect to the amount of relaxation.Therefore, the change in scale for the same amount of relaxation is small, for example, 2 to 3 degrees, whereas the 6th string has a large amount of slack. 6 has a large wire diameter, so the elongation rate is small, and the sensitivity to scale change with respect to the amount of relaxation is large. Therefore, the scale change is large, for example, 6 to 7 degrees for the same amount of relaxation, and this makes tremolo arm 7 Not only does the tremolo effect when pressed differ depending on each string, but the tremolo effect on the commonly used 1st to 3rd strings is weak, and on the contrary, the 6th string has a loose tremolo effect rather than a strong tremolo effect. Too much and prone to outchuning, therefore,
There were drawbacks such as the inability to change the tremolo with chords.

As a countermeasure against this, as shown in FIG. A tremolo is provided by providing a rotor 15 that rotates around the center, attaching a locking part 17 for locking the end of each string 16 to the rotor 15, and supporting each string 16 with a bridge roller 18 whose position is fixed. There is a Kohler type that applies tremolo by changing only the locking portion 17 by rotating the rotor 15 by pushing the arm 13.

In this case, since the position of the bridge roller 18 is constant, each string 1 by pushing the tremolo arm 13 is
Although it is possible to make the amount of slack of the strings 16 constant, it is not possible to change the amount of slack in accordance with the elongation rate of each string 16, so there is a drawback that the tremolo effect of each string 16 cannot be made the same. Ta.

(Problems to be Solved by the Invention) The object of the present invention is to obtain an appropriate tremolo effect that corresponds to changes in the wire diameter, elongation, material, etc. of each string, or to the player's preferences.

(Means for Solving the Problems) As shown in FIGS. 1, 8, and 11, the present invention provides for In order to temporarily change the tension of the strings 23 and apply a tremolo, a bridge 24 that supports each string 23 attached to the upper shell 22 and a bridge 24 that supports each string 23 are installed.
By pushing and moving the tremolo arm 26 against the elastic force, the tremolo arm 26 rotates around the shaft 27 between the center of the shaft 27 and the string 23. A pressure contact distance variable device 28 for changing the pressure contact distance is provided, and the pressure contact distance variable device 28
The change in pressure contact distance can be adjusted for each string 23,
For example, as shown in FIG.
Adjust the angular position of the bend adjustment piece 50 corresponding to
Further, as shown in FIG. 11, the pressure contact distance with respect to the rotation angle of the tremolo arm 26 when the tremolo arm 26 rotates against the elastic force There is a tremolo mechanism 29 for a guitar in which the change in is gradually reduced at an arbitrary rate of change.

(Function) When the tremolo arm 26 is pushed against the elastic force, the pressure contact distance variable device 28 rotates around the shaft 27, and as the pressure contact distance variable device 28 rotates, the pressure contact distance variable device 28 rotates. The pressure contact distance between each chord 23 of the pressure contact surface and the center of the shaft 27 is,
For example, as a result of changing each string 23 by an arbitrary amount and at an arbitrary rate of change using an arbitrary curve formed on the pressing surface, it is possible to obtain an appropriate tremolo effect for each string 23.

(Example) Next, the configuration of an example of the present invention is shown in FIGS. 5 to 1.
This will be explained using Figure 1.

Left and right frame parts 34 and 35, which are integrally formed with front and rear plates 32 and 33, are attached to the body shell 31 of the electric guitar 30 with four screws 36, and the front plate part 32 has a bridge joint. Tension bracket 3 installed on point 37
8, a tension roller 40 for each string 39 is rotatably attached to a shaft 41; is attached so that its vertical position can be adjusted via a screw 45, and its position can be adjusted back and forth by tightening a screw 46 that moves the bridge joint 37 back and forth (in the left-right direction in FIG. 8).

On the other hand, between the left and right frame parts 34 and 35, there is a rotation shaft 48, which also serves as a torsion spring, passing through a cylindrical main rotor 47 whose one end is rotatably supported by the right frame part 35, and a spring shaft 48, hereinafter abbreviated as abbreviation, at one end. is supported by the left frame part 34 via a cam plate 49, and the other end is attached to the main rotor 47 with a pin (not shown) integrally connected to the main rotor 47, and the bend adjustment piece 5 brings the string 39 into pressure contact.
0 is rotatable around the pin 51 and the screw 52
The bend adjusting piece 50 is attached so that the distance from the axis center of the spring shaft 48 to the pressure contact surface 53 with the string 39 can be adjusted for each string 39, and the pressure contact surface 53 with the string 39 of the bend adjustment piece 50 is attached to the center of the spring shaft 48 for each string 39. For example, an arbitrary oval curve is formed so that the pressure contact distance from the center of the spring shaft 48 to the pressure contact position of the string 39 gradually decreases at an arbitrary rate of change by counterclockwise rotation in FIG.

A fine inch una frame 54 is integrally attached to the main rotor 47 to which the bend adjustment piece 50 is attached via screws 55, and the main rotor is attached to the fine inch una frame 54 against the biasing force of the spring shaft 48. In addition, a tremolo arm 56 is attached to rotate the string 47 in the counterclockwise direction in FIG. A fine tuner device 59 whose stop position can be adjusted in the front-rear direction, that is, each string 39 forms a piece receiver 58 and is rotatable about a pin 60.
A fine tuner device 59 is attached to the tip of another tuner arm 61 to adjust the tension of each string 39 by changing the locking position by turning left and right a tuner nut 64 attached to a tuner rod 63 connected by a pin 62. It is being

In this case, as shown in FIG.
Since the piece receiver 58 that supports the bobbin-shaped end piece 57 at the 9th end is formed into a conical shape, even if the end piece 57 is in any vertical, horizontal, or diagonal position within the piece receiver 58, the string after tuning is The tension of the string 39 can be kept constant and the string 39 can be positioned at the center of the cone, so that when the attitude of the end piece 57 changes, the string 39 can be displaced in any direction, up, down, left, right, etc.
In addition to eliminating the problem of the string 39 breaking due to contact with the
The posture of the end piece 57 is easily changed by the tension change in step 9, and in this case, there is an effect that a stable tuning state can be maintained.

In addition, 65 is a fine inch unit cover on the upper surface of the fine inch unit 59.

Next, the operation of this embodiment will be explained.

In the tremolo mechanism 66 configured in this way, the pressure contact surface 53 of the bend adjustment piece 50 for each string 39 with the string 39 is moved from the rotation center of the main rotor 45 by the rotation of the main rotor 47 by the tremolo arm 56. For example, the change in distance to 53 (S1 in Figure 11) is larger for the first string 39-1,
An arbitrary oval curve in which the sixth string 39-6 is smaller, and in which each string 39 changes by one degree of the scale by combining the rate of change with the amount of change in the locking position (S2 in Fig. 11). In this case,
The tremolo can be changed by a chord, and by arbitrarily forming the pressure contact position or the curve of the pressure contact surface 53, the tremolo effect depending on the pressing angle of the tremolo arm 56 can be made to vary depending on the angular position. It can also be done. Also, tremolo arm 56
It can be easily made for left-handed users by attaching it to the screw holes 67 at symmetrical positions of the fine inch yuna frame 54, and an elastic force imparting mechanism using an arbitrary spring instead of the spring shaft 48 can be used. In addition, the fine inch unit 59 can be independently attached to the rear plate portion 33 without being attached to the fine inch unit frame 54. In this case, each string 39 can be moved by pressing the tremolo arm 56.
Further tension changes can be made.

(Effects of the Invention) The present invention applies tremolo by temporarily changing the tension of the strings stretched between the head of the guitar and the body shell. By pushing and moving the tremolo arm against the elastic force between the supporting bridge and the locking part that locks the end of each string, the tremolo arm rotates around the shaft and connects the center of the shaft and the string. A pressure contact distance variable device that changes the pressure contact distance with the tremolo arm is provided, and the pressure contact distance change by the pressure contact distance variable device can be adjusted for each string. A tremolo mechanism for a guitar is provided in which a change in a pressure contact distance with respect to an arm rotation angle is gradually reduced at an arbitrary rate of change.

As a result, the present invention makes it possible to obtain an appropriate tremolo effect in response to changes in the wire diameter, elongation, material, etc. of each string, or the player's preferences. In particular, it has the effect of being able to change the tremolo with chords.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the entirety of the present invention;
3 is a schematic front view thereof, FIG. 4 is a schematic side view of another conventional embodiment, and FIG. 5 is an entire embodiment of the present invention. , FIG. 6 is a perspective view of the tremolo mechanism, FIG. 7 is a side view of the main part, FIG. 8 is a cutaway side view of the main part, FIG. 9 is a front view of the main part, and FIG. 10 is a front view of the main part. FIG. 11 is an explanatory diagram of its main parts, and FIG. 11 is an explanatory diagram of its operation. 20... Guitar, 21... Head, 22... Shell, 23
... string, 24 ... bridge, 25 ... locking part, 26 ... tremolo arm, 27 ... shaft, 28 ... pressure contact distance variable device, 29 ... tremolo mechanism, 50 ... bend adjustment piece,
51...pin, 52...screw.

Claims (1)

[Claims] 1. In order to temporarily change the tension of the strings stretched between the head of the guitar and the upper part of the body to apply a tremolo, a bridge supporting each string attached to the upper part of the guitar and the end of each string are installed. Pressure contact between the locking part that locks the string and the tremolo arm being pushed and moved against elastic force to rotate around the shaft and change the pressure contact distance between the center of the shaft and the string. A distance variable device is provided, and the pressure contact distance change by the pressure contact distance variable device can be adjusted for each string, and further, the pressure contact distance changes with respect to the tremolo arm rotation angle when the tremolo arm rotates against elastic force. A tremolo mechanism for a guitar, characterized in that the tremolo gradually decreases at an arbitrary rate of change.