JPH0337029Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a mechanism for attaching an operating arm such as a tremolo arm to various guitars and other stringed instruments.

(Prior art) For example, the conventional method of attaching the tremolo arm of an electric guitar is to attach it to the tailpiece by screwing it into the threaded part of the arm.
No. 123895), fix it with a double nut type, or
A spring is applied to the head of the lower end of the arm to lock it, and a spacer is interposed between the arm and the insertion hole. It is better if the tremolo arm is easy to attach and detach, and its position can be changed to suit the player. However, this method is difficult to meet the above requirements, and cannot be used to determine the position of the arm.
On the other hand, Utility Model Application No. 59-126292 has a structure in which a slider for engaging or disengaging the engaging element is provided in a concave groove provided at the base of the arm. However, in order to attach and detach the arm, it is necessary to slide the slider one by one.

(Technical Issue) Therefore, the present invention is an operating arm mounting mechanism for a stringed instrument that allows an operating arm such as a tremolo arm to be attached and detached with a single touch, and also allows the operating arm to be fixed in position around the axis or to be moved freely. It provides:

(Technical Means) The problem is a mechanism for attaching an operating arm to a swinging member 3 attached to a stringed instrument body 1 in order to operate the swinging member 3 that changes the vibration of the strings 2. the actuating arm 4 having an engagement groove 6 formed on the circumferential surface of the base shaft portion 5 of the arm for attachment;
A threaded cylinder 11 having an insertion hole 7 for inserting the base shaft part 5 and fixed to the swinging member 3 side, and an actuation arm screwed onto the outside of the threaded cylinder 11 and inserted into the threaded cylinder 11. A small hole 15 is formed in the tip portion that substantially coincides with the tip of the female thread tube 14, and the female thread tube 1
4, which engages the engagement groove 6 of the arm base portion 5 through the small hole 15 and comes into elastic contact with the engagement groove 6 by the spring 9, and the swinging member 3 is sandwiched between the engagement piece 8 Threaded tube 1 on the opposite side from female threaded tube 14
1 and a variable torque member 10 that presses against the base shaft portion 5 to change the rotational torque.

(Operation of the invention) By inserting the base shaft portion 5 of the actuating arm 4 into the insertion hole 7 on the side of the swinging member 3 such as the tailpiece, the engagement piece 8 is elastically inserted into the engagement groove 6 provided in the base shaft portion 5. Since it is connected and locked, it is attached so that it will not come off unless it is pulled out against its elasticity, and therefore the actuating arm 4
It can be attached and detached with just one touch, just by inserting and removing it. Further, since the variable torque member 10 is applied to the actuating arm 4, the actuating arm can be fixed at a desired position by increasing the torque, and the actuating arm can be freely rotated by weakening the torque.

(Embodiment) The illustrated embodiment relates to a mechanism for attaching a tremolo arm to an electric guitar A. A swinging member 3, that is, a tailpiece is swingably attached to the main body 1, and a substantially L-shaped structure is attached to one side of the swinging member 3, that is, the tailpiece. An actuating arm 4 is mounted for swinging the tailpiece. As shown in each figure, the actuating arm 4 is inserted into an insertion hole 7 passing through a threaded cylinder 11 screwed onto the swinging member 3, and an engagement groove 6 is recessed around the small diameter portion 5a at the end of the arm base portion 5. The small diameter portion 5a has a female threaded tube 1 having a female thread 13 that is screwed into the main threaded portion 12 of the threaded tube 11.
The spherical engagement piece 8 is inserted into the lower through hole 14a of 4 and is fitted into the radial small hole 15 provided through the portion, and the engagement groove 6 is engaged with the spherical engagement piece 8 to be stopped. The engagement piece 8 is elastically biased inward by a ring-shaped spring 9 provided at the lower part of the female threaded cylinder 14. The engagement piece 8 may be hemispherical only on the engagement side, or may be a part of the spring 9 provided with a protrusion 9'. 16 is spring 9
This is the set groove. The engagement piece 9 and the part where it is provided are not limited to one place, and the spring 9 that biases it
It is not limited to a ring shape either.

Thus, the variable torque member 10 is connected to the threaded cylinder 11.
An internal thread 1 is provided at the upper end and is threaded through the arm 4 and screwed into the large diameter threaded portion 17 at the upper end of the threaded cylinder 11.
A variable torque mechanism is constituted by a variable torque ring 19 having a diameter of 8 and a washer-shaped member 10 having a tapered circumferential surface 22 at the upper end that is in contact with a tapered surface 21 extending from the internal thread 18 to the arm through hole 20.
Further, a tapered peripheral surface 22 is provided on the lower surface of the member 10,
A mortar-shaped recess may be provided on the upper surface of the screw cylinder 11. The variable torque member 10 is made of Delrin (polyacetal manufactured by Dupont) resin, and has a split 24 that narrows the diameter of the arm passage hole 23. Therefore, when the variable torque ring 19 is tightened, the tapered surface 21 and the tapered circumferential surface 22 press against each other. Since the washer-like variable torque member 10 tightens the actuating arm 4, it can be fixed at a desired position so that it does not rotate, and if it is loosened, the torque is reduced so that it can be rotated freely.

(Effect of the invention) The present invention is constructed as described above, and the operating arm 4 for operating the swinging member 3 and the insertion hole 7 for its attachment are provided with elastic locking consisting of the engagement groove 6 and the engagement piece 8. Since the means is provided, one-touch attachment and detachment is possible by simply inserting and removing the base shaft portion 5 of the actuating arm 4, and there is no fear that it will easily come off, so attachment and detachment are extremely easy. In addition, since a variable torque member 10 is provided that presses against the base shaft portion 5, the rotation torque can be adjusted to the player's desired rotation torque.Also, when the torque is zero, the arm position is lowered to a, but when the player desires position b, the operating arm can be adjusted. 4
It is very easy to operate as it can be easily fixed at a desired position. Further, since the engaging piece 8 and the variable torque member 10 are provided at two locations, upper and lower, the arm 4 does not wobble, and even if wobble occurs, the desired effect can still be achieved.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the operating arm attachment mechanism for a stringed instrument according to the present invention, in which FIG. 1 is a partially sectional side view, FIG. 2 is an exploded perspective view, and FIG. 3 is a front view of the entire stringed instrument. DESCRIPTION OF SYMBOLS 1... Stringed instrument body, 2... String, 3... Swinging member, 4... Operating lever, 5... Base shaft portion, 6... Engagement groove, 7... Insertion hole, 8... Engagement piece, 9... Spring, 10... Variable torque member.

Claims (1)

[Claims for Utility Model Registration] (1) A mechanism for attaching an operating arm to a swinging member 3 attached to a stringed instrument body 1 in order to operate the swinging member 3 that changes the vibration of a string 2. , the actuating arm 4 having an engagement groove 6 formed on the circumferential surface of the base shaft portion 5 of the arm for the attachment;
A threaded cylinder 11 having an insertion hole 7 for inserting the base shaft part 5 and fixed to the swinging member 3 side, and an actuation arm screwed onto the outside of the threaded cylinder 11 and inserted into the threaded cylinder 11. A small hole 15 is formed in the tip of the female threaded tube 14, which is attached to the tip of the female threaded tube 14, and is inserted into the engagement groove 6 of the arm base portion 5 through the small hole 15. An engaging piece 8 that is locked and comes into elastic contact with the engaging groove 6 by a spring 9 is screwed into the threaded cylinder 11 on the opposite side of the female threaded cylinder 14 with the swinging member 3 in between, and the base shaft portion 5
An operating arm mounting mechanism for a stringed instrument, comprising: a variable torque member 10 that changes the rotational torque by being pressed against the variable torque member 10. (2) The operating arm mounting mechanism for a stringed instrument according to claim 1, wherein the variable torque member 10 has a washer shape with a tapered peripheral surface 22.