JPH0210553Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention prevents the strings from loosening by holding the strings in a tensioned state using a locking nut of an electric guitar, or more specifically, a thread winder. This invention relates to an improvement in a lock nut that is provided in such a way that it is possible to do so.

[Prior Art] Generally, in an electric guitar, as shown in Fig. 6, a tremolo unit d is attached to the body c side facing a pincushion b provided in the head a, and a tremolo unit d is installed between the tremolo unit d and the pincushion b. The string e is then stretched. A lock nut g is provided at the tip of the neck f to maintain the tension of the string e. To explain in more detail, FIG. 7 is a drawing showing the specific structure of the lock nut g, in which h has a width dimension that is approximately the same as the width of the neck f, and is formed into a chevron-shaped side cross section. Shows the main body. Although not shown in the figure, the main body h is provided with a notch in its bottom surface extending in both width directions. Further, slits i are provided in the main body h in correspondence with each other in the front and rear so as to face the above-mentioned notch. Reference numeral j denotes a holding metal fitting formed into a substantially rectangular plate shape with a width slightly smaller than the above-mentioned notch, and a female screw portion is carved in the center of the holding metal fitting j. The presser metal j is attached so as to be able to move forward and backward in the vertical direction within the notch through the screwing action of the clamping screw k with the female screw portion. That is, the string e is inserted through the slit i, and the string e is held in a tensioned state by the presser j, thereby preventing the string from becoming loose.

[Problems that the invention attempts to solve] However, in the case of the above-mentioned lock nuts,
Since the presser fitting is tightened through the threading action of the clamping screw, a problem arises in that a tool is required each time the string is adjusted, which is very troublesome.

The present invention is an attempt to improve the above-mentioned problems, and the problem to be solved lies in making it possible to easily clamp the strings without the need for tools. have

That is, the present invention is characterized in that the strings are clamped through the tightening action of the cam part, and the specific means and action thereof are as follows.

[Means for solving the problem] A cam lever formed by a cam part and a lever part extending from the cam part is made vertically rotatable with respect to the main body of a lock nut that is fixed to the tip of the neck of an electric guitar. Attach.

The cam portion is formed so that its diameter gradually increases from one end toward the lever portion with the rotation fulcrum as the center, and the maximum diameter portion thereof is provided in pressure contact with the main body.

[Function] With the string inserted between the main body of the lock nut and the cam lever, by rotating the cam lever in the loosening direction (upward), the tension of the string can be adjusted via the thread winder.
By rotating the cam lever in the tightening direction (downward), the string can be sandwiched between the main body and the cam part of the cam lever, and the adjusted tension of the string can be maintained (locked). .

[Examples] Specific examples of the present invention will be described below.

1 to 3 are drawings showing a first embodiment, and 1 indicates a lock nut. The lock nut 1 is formed of a body 1A and a cam lever 1B, which will be described later.The body 1A is a neck 2 of an electric guitar.
attached to its tip.

The main body 1A includes a base 4 extending in the front-rear direction and formed into a rectangular plate shape, a support part 3 extending in both width directions from one end of the base 4, and the support part 3. 3
The support base part 3 is provided with six slits 6 extending in the front-rear direction at regular intervals in both width directions. Ru. A support shaft 7 is attached to the support base portion 3 in both width directions so as to pass through each slit 6.
is suspended horizontally. Furthermore, a pair of notches 8, 8 formed in an arc shape facing each of the slits 6 are cut in the support base portion 3 and extending in the vertical direction. A string presser piece insertion hole 9 formed in a circular hole shape matching the diameter of the curved surface of the notches 8, 8 is bored across the upper part of the mounting portion 5, and a disk-shaped string presser piece insertion hole 9 is bored in the insertion hole 9. String presser piece 1 to be formed
0 is inserted so that it can be moved up and down. Further, a round hole 11 is bored in the mounting part 5 so as to coincide with the center line of the insertion hole 9, and a female screw part 1 is formed between the round hole 11 and the insertion hole 9.
2 are provided in communication with each other. And the same female thread part 1
A fine adjustment screw 13 is screwed into 2 so that it can move forward and backward in the vertical direction. A through hole 14 is formed in the mounting portion 5 in the front-rear direction, and a bolt 15 is threaded through the through hole 14 into a female thread (not shown) formed in the neck 2. will be combined. That is, it is provided so that the main body 1A can be attached to the neck 2 via the bolt 15. Furthermore, six screw holes 16 are formed in the base 4, located near the front end and corresponding to the positions of the slits 6. Further, the base 4 is provided with a string hooking hole 17 in the vicinity of each screw hole 16 by cutting out the base 4 from the front edge to the middle.

On the other hand, the cam lever 1B is
It is formed of a cam portion 18 formed at one end and a rectangular rod-shaped lever portion 19 extending from the upper edge of the cam portion 18. The cam portion 18 has a through hole 20.
is drilled, and the cam lever 1 is inserted through the through hole 20.
B is rotatably supported by the support shaft 7 in the vertical direction.

The cam portion 18 also has a circular arc whose diameter is centered around the through hole 20 and gradually increases from one end toward the lever portion 19, and a gentle circular arc that gradually decreases beyond the maximum diameter portion. cam surface 1
8' is formed. More specifically, the lever part 1
9 is rotated to a position parallel to the base 4, the largest diameter part is in the strongest pressure contact with the string presser piece 10,
It is provided so that a state of locking can be obtained at a position beyond the maximum diameter part. Further, at the upper end of the lever part 19, a female thread part 21 is formed at a position near the front end of the lever part 19 so as to correspond to the threaded hole 16, while a female thread part 21 has a diameter larger than that in the lower part thereof. (hereinafter referred to as “large diameter hole portion 22”)
is drilled.

Reference numeral 23 denotes a fixing screw, and the screw 23 has a male threaded portion formed at one end, a gripping portion formed by knurling the other end, and a diameter smaller than that of the male threaded portion. The cam lever 1B is provided so that the cam lever 1B can be fixed to the main body 1A with the same male threaded part screwed into the threaded hole 16 and the rod part inserted into the female threaded part 21. It will be done.

FIGS. 4 and 5 are drawings showing the second embodiment, in which the main body 1A is formed from the base 4 and the support section 3 in the first embodiment. A string presser piece insertion hole 24 is bored in the bottom of the slit 6 formed in the support base 3, and a string presser piece 25 formed in a disk shape is inserted into the insertion hole 24 so as to be able to rise and fall freely.
Further, a round hole 26 having a smaller diameter than the insertion hole 24 is bored below the insertion hole 24, and an adjustment ball 2 formed in a spherical shape and having a slightly smaller diameter than the insertion hole 26 is formed in the round hole 26.
7 is inserted so that it can be moved up and down. Further, a female screw portion 28 is formed in the base 4 in communication with the round hole 26 and passing through the same portion from the upper part of the front end surface to the diagonally lower bottom surface. The female screw portion 28 has a fine adjustment screw 29 having a tapered portion at its tip.
The tapered portion is brought into contact with the adjustment ball 27 and screwed together so as to be freely forward and backward diagonally up and down.

Next, its effect will be explained.

In the first embodiment, as shown in FIG. 3, by rotating the cam lever 1B in the loosening direction, that is, in the clockwise direction (upward) in the same figure, the string presser piece 10 is inserted between the cam part 18 and the string presser piece 10. This produces the effect of gradually weakening the pressing force on the strings. By weakening the pressing force on the string in this way, the tension of the string can be adjusted by winding the string. With the string tension adjusted in this way, by rotating the cam lever 1B in the tightening direction, that is, in the counterclockwise direction (downward) as shown in FIG. 2, the cam surface 18' String presser piece 1
The zero gap can be gradually narrowed, thereby producing an effect of gradually increasing the pressing force of the cam portion 18 against the string. When the lever portion 19 is rotated to a position substantially parallel to the base 4, the maximum diameter portion presses against the string presser piece 10, and the string is held between the cam portion 18 and the string presser piece 10. In other words, adjustment is performed. This provides an effect of holding (locking) the string and its tension state, and also provides a state (locked state) in which the return of the cam lever 1B is restricted in a state in which the maximum diameter portion slightly exceeds the string presser piece 10. Further, by screwing the fixing screw 23 into the screw hole 16 in a state in which the strings are held in this manner, the above-mentioned locked state can be maintained even more reliably.

On the other hand, in the second embodiment, the fine adjustment screw 29
can also be provided parallel to the base 4.
In addition, in the same embodiment, the string presser piece 25 and the adjustment ball 27
It is also possible to form them integrally.

[Effects of the invention] The invention is constructed as described above, and
As described above, the main body of the lock nut is attached to the tip of the neck of the electric guitar, and the cam lever of the lock nut, which is formed by a cam part and a lever part extending from the cam part, can be gradually pressed against the main body. By supporting the string so that it can freely rotate in the vertical direction, not only no tools are required, but the string can be clamped to the lock nut with just one touch.

[Brief explanation of the drawing]

1 to 3 are drawings showing a first embodiment, in which FIG. 1 is an exploded perspective view of a locking nut according to the present invention, and FIG. 2 is a sectional view showing the locking nut in a locked state. FIG. 3 is a sectional view showing the lock nut in an unlocked state. 4 and 5 are drawings showing the second embodiment, in which FIG. 4 is an external perspective view of the lock nut, and FIG. 5 is a sectional view of the same side. 6 and 7 are drawings showing the prior art, in which FIG. 6 is an overall plan view of an electric guitar, and FIG. 7 is an external perspective view of a lock nut. 1...Lock nut, 1A...Main body, 1B...
Cam lever, 2...Net, 3...Support part, 4
... Base, 5 ... Mounting part, 6 ... Slit, 7
...Spindle, 8...Notch, 9...String presser piece insertion hole, 10...String presser piece, 11...Round hole, 12...
Female thread part, 13... Fine adjustment screw, 14... Through hole, 15... Bolt, 16... Screw hole, 17...
Latching hole portion, 18... cam portion, 18'... cam surface,
19...Lever part, 20...Through hole, 21...Female screw part, 22...Large diameter hole part, 23...Fixing screw,
24...String presser piece insertion hole, 25...String presser piece, 2
6...Round hole, 27...Adjustment ball, 28...Female screw portion, 29...Fine adjustment screw.

Claims (1)

[Scope of utility model registration request] A cam lever formed by a cam part and a lever part extending from the cam part is rotatably supported in the vertical direction on the main body fixed to the tip of the neck, and the cam part has the above-mentioned pivot point. A lock nut for an electric guitar comprising a cam surface having a circular arc whose center diameter gradually increases from one end toward the lever part, and the maximum diameter part of the cam surface is provided in pressure contact with the main body.