JPH0263236B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting structure for a pickup piezoelectric element that outputs musical tones of a guitar having an acoustic body as an electric signal to the outside.

Conventionally, in guitars, multiple pick-up piezoelectric elements were installed at positions corresponding to each string in the saddle with a width that would fit in the saddle, or a U-shaped metal cross section corresponding to the length of the saddle was installed below the saddle. There are cases in which multiple piezoelectric elements are attached to a case, but the basic idea behind all of them is to pick up the vibrations of the strings. Multiple piezoelectric elements are arranged along the row of strings for each string, and each piezoelectric element is also used to pick up the vibrations of the strings located almost directly above it, so individual piezoelectric elements are commonly used. Although the width is narrow and the length varies depending on whether one or two strings are targeted, it is relatively short and shaped like a rectangular chip. In this case, the strings applied to the chip of each piezoelectric element The pressing force due to the tension of the piezoelectric element is different for each chip, and the sensitivity of each chip also varies depending on the position of the chip. Therefore, in order to make the sensitivity characteristics uniform, it is necessary to adjust the sensitivity between the piezoelectric element and the saddle. Some kind of medium must be interposed to make the sound uniform, and in that case, the production cost of the pickup increases and the fidelity of the sound decreases.Also, no matter how good the pickup is, However, when it is actually attached to a guitar, the sensitivity must be adjusted for each string, and this sensitivity adjustment requires considerable skill and effort.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional guitar pick-up mounting structure by providing a guitar pickup mounting structure that has a simple structure and can easily and faithfully pick up the vibrations of each string.

Next, the configuration of a first embodiment of the present invention will be explained with reference to FIGS. 1 to 5.

The third piece is located below the saddle 3 on the back side of the bridge 2 attached to the front shell 1 forming the acoustic body of the guitar.
A substantially square slit 4 is formed in the middle position between string S3 and the fourth string S4, and a pick-up 5 is formed in the slit 4. In this case, a silver electrode is attached to a ceramic made of lead zirconate titanate (Ztp) under vacuum. A pick-up 5, in which a thin brass protective plate 7 is pasted with a conductive adhesive to a vapor-deposited bimorph piezoelectric element 6, is attached via an insulating sheet 8 while being shielded with a metal foil 9 as shown in FIG. Each core wire of a shielded wire 11 drawn into the pick-up 5 through a wiring hole 10 formed in the front shell 1 is soldered to each electrode on both sides of the piezoelectric element 6, and is attached to the piece 2 on the pick-up 5. The lower surface of the saddle 3 is pressed under the tension of each string S1 to S6.

Therefore, when playing the first string S1 to the sixth string S6 in sequence with this pick-up 5 mounting structure, the vibration of each string S1 to S6 is approximately The sound is transmitted evenly to the piezoelectric element 6, and from the piezoelectric element 6 via the amplifier (not shown), the sound faithful to the vibrations of the strings S1 to S6, that is, the sound with a wide range and good sensitivity, is produced as a result of the sensitivity. Occurs evenly.

Next, FIG. 6 shows a second embodiment of the present invention, in which
In this case, both ends of the saddle 3, for example, the second string 2
Pick-ups 13 and 14 are installed in the slot 12 in the piece 2 at the lower position of the fifth string S5, increasing the mechanical stability of the saddle 3 and increasing the left and right pick-ups 13, 14.
In addition to being able to optimally form the frequency characteristics of the 14 strings corresponding to the frequencies of the strings directly above them, for example, the first string S1 to the third string S3, and the fourth string S4 to the sixth string S6,
The configuration, operation, and effects are almost the same as those of the first embodiment.

Here, as a feature of the present invention common to the first and second embodiments, the pick-ups 5, 13, 4 in both embodiments are easily replaced by the slits 4, 12. In this case, the pick-ups 5, 13, 14 can be attached and detached even more easily by connecting the pick-ups 5, 13, 14 with the external wiring by an insertion type connection without soldering. In addition, by attaching volume or tone control dials for pickups 5, 13, and 14 outputs to the left and right surfaces of bridge 2 and a small jack on the right side of bridge 2, no secondary processing of the guitar body is required. Even in the unlikely event of a failure, all external output devices including the electric circuit can be replaced by simply replacing piece 2. Moreover, in all of the above cases, there will be no effect on the raw sound even without using an amplifier. In addition to the major feature of not causing any change, S1, which is the source of vibration,
~Since the piezoelectric element 6 as a power generator is attached closer to the S6, even if the guitar is brought closer to the amplifier,
The housing is more difficult to bend, and the piezoelectric element 6 has no substantial dimensional restrictions when it is installed.
The material, shape, etc. of the piezoelectric element 6 can be arbitrarily set in accordance with the frequencies of the strings S1 to S6.

Next, the effects of the present invention will be explained.

The present invention includes a bridge fixed to the top of the guitar;
Each string-supporting saddle is vertically movably attached to each string-supporting position of the piece, perpendicular to the front shell, a slit formed by opening the side surface of the piece at a position below the saddle of the piece, and a lower end of the saddle. The guitar pickup mounting structure includes a pickup made of a piezoelectric element that is in contact with each other to detect the vibration of each string and is removably inserted into the slit.

As a result, the present invention allows a pick-up with a relatively wide surface and high sensitivity to be brought into direct contact with the lower end of the saddle so that the vibrations of the string can be spread more faithfully, while also making it easy to replace the pick-up. This has the effect of making it possible to finish tuning the guitar while replacing the pick-up, allowing the guitar to be finished in its optimum condition.

[Brief explanation of drawings]

1 is a front view of essential parts of the first embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a cutaway side view thereof, FIG. 4 is an enlarged cutaway side view of the pickup 5, and FIG. 5 6 is a developed view of the metal foil 9, and FIG. 6 is a front view of a second embodiment of the present invention. 1... Upper shell, 2... Piece, 3... Saddle, 4,1
2...Slit, 5, 13, 14...Pickup, 6...Piezoelectric element, S1-S6...String.

Claims (1)

[Claims] 1. A bridge fixed to the upper part of the guitar, each string support saddle mounted vertically movably perpendicular to the upper part at each string support position of the bridge, and a side surface of the bridge at a position below the saddle of the bridge. A guitar comprising: a slit formed in an open manner; and a pick-up made of a piezoelectric element that is in contact with the lower end of the saddle to enable vibration detection of each string and is removably inserted into the slit. Pick-up mounting structure.