JPS5814190A - Pickup mount construction for musical instrument with sound body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting structure for a piezoelectric element for a pickup that outputs musical sounds of musical instruments such as guitars, violins, and pansies having acoustic bodies to the outside as electrical signals.

Conventionally, for example, in a guitar, a plurality of piezoelectric pickup elements were installed in the saddle at positions corresponding to each string with a width that would fit in the saddle, or a metal element corresponding to the length of the saddle was installed at a position below the saddle. There are cases in which multiple piezoelectric elements are attached to a case with a U-shaped cross section, but the basic idea behind all of them is to pick up the vibrations of the strings. Multiple tubes are arranged along the row of strings for each string or one or two strings, and each piezoelectric element is also intended to pick up the vibrations of the strings located almost directly above it. Piezoelectric elements are generally narrow in width;
Although the length varies depending on whether one or two strings are targeted, it is relatively short and formed in the shape of a rectangular chip, but in this case, the pressing force due to the tension of the strings applied to the tip of each piezoelectric element is In addition, the sensitivity of each chip varies depending on the position of the chip, etc., so in order to make the sensitivity characteristics uniform, there is a
Some kind of medium must be involved to equalize the sensitivity, in which case it is difficult to use.

The drawback is that the production cost of pickups is high and the fidelity of the sound is reduced.Also, no matter how good the pickup is, the sensitivity must be adjusted for each string when actually attached to the instrument. Moreover, this sensitivity adjustment requires a considerable amount of skill and effort.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art by providing a pickup mounting structure for a musical instrument having an acoustic body that has a simple structure and can easily pick up the vibrations of each string faithfully.

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

Attached to the upper part of the guitar that forms the acoustic body of the guitar? The position below the saddle 8 on the back side of the piece 2 that has been placed is the 8th string S3
A circular depression 4 is formed at an intermediate position between the fourth string S4 and the fourth string S4.
In the recess 4 is a pickup 5, in this case a bimorph piezoelectric element 6 made of a ceramic made of lead zirconate titanate (Ztp) with a silver electrode vacuum-deposited, and a thin brass protective plate 7 attached with conductive adhesive. The attached pickup 5 is installed through an insulating sheet 8 while being shielded with metal foil 9 shown in FIG.
The core wires of the shielded wire 11 drawn through the wiring hole 10 formed in the top are soldered to the electrodes on both sides of the piezoelectric element 6, and the bottom surface of the saddle 8 attached to the bridge 2 is attached to the top surface of the pickup 5, and the bottom surface of the saddle 8 attached to the bridge 2 is connected to each string. They are pressed together under the tension of S1 to S6.

Therefore, in this pickup 5 mounting structure, the first string S
When the first to sixth strings S6 are played sequentially, since the piezoelectric element 6 has a large disc-shaped area, the vibrations of each string 81 to S6 are almost equally transmitted to the piezoelectric element 6, and the piezoelectric element 6 From the speaker via the amplifier (not shown), strings 81 to S
A sound that is faithful to the vibration of No. 6, that is, a sound with a wide sound range and good sensitivity, is generated with no unevenness in sensitivity.

Next, FIG. 6 shows a second embodiment of the present invention, in which both ends of the saddle 12, for example, the second string S2 and the fifth string S
Pickups 16 and 17 are installed at the left and right sides of the bridge 18 at 14 degrees 15 at the lower position to increase the mechanical stability of the saddle 12 and to change the frequency characteristics of the left and right pickups 16 and 17 to the strings directly above them, for example, the first string. The configuration, operation, and effects are substantially the same as those of the first embodiment, except that they can be formed optimally corresponding to the frequencies of the 81st to 8th strings S8 and the 4th strings S4 to 6th strings S6.

Note that the pickup 5 in the first and second embodiments
, 16.17 Storage recesses 4, 14.15 are shown in Figures 7 to 9.
The pickups 5, 16, .
By making the connection between the pickup 17 and the external wiring an insertion type connection without soldering, the pickup 5, 16, and 17 can be attached and detached even more easily.
, 16.17 Output volume or tone control dials are attached to the left and right surfaces of pieces 2 and 18, and a small jack is attached to the right side of pieces 2 and 18, thereby eliminating the need for any secondary processing of the instrument itself. , even in the event of a failure, all external output devices including the electric circuit can be replaced by simply replacing pieces 2 and 18. 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 great feature of not causing any change, the piezoelectric element 6 as a generator is attached closer to the strings S1 to S6, which are the sources of vibration, so howling is less likely to occur even when the instrument is brought closer to the amplifier. Furthermore, since there are no substantial dimensional restrictions when mounting the piezoelectric element 6, the material, shape, etc. of the piezoelectric element 6 can be arbitrarily set in accordance with the frequencies of the strings 81 to S6.

Next, in FIG. 10, a pickup 28 using a wide piezoelectric element is installed between at least the illustrated part of the leg of the bridge 21 of the banjo 20 and the head 22, and a connector 28 is attached to the tailpiece 24. Tone circuit block 25
This is an eighth embodiment of the present invention in which the vibrations of the strings S7 to S810 are outputted to the outside through the strings S7 to S10. The strings S7 to 81 are connected between the head 22 that resonates the
Because it is sandwiched using zero tension, it has a large S/N ratio, good sound quality, and has the advantage of being able to reproduce the natural tone in a nearly perfect state without worrying about howling.

Next, in FIG. 11, a thin and strong pickup 29 is attached to at least a part of the leg of the bridge 27 of the violin 26, in this embodiment between both legs and the instep 28, and the pickup 29 is attached to the tail piece 80. Tone circuit block 8 with attached connector
This is the fourth embodiment of the present invention in which the vibrations of the strings 811 to 814 are output to the outside through the strings 811 to 814 through the strings 1 and 7, and this case also has the same features as the above, such as being able to reproduce the raw tone in a nearly perfect state. be.

In each of the above-mentioned embodiments, the pickup was attached to the front surface of each musical instrument, but as shown in FIG. Even if the pickup 87 of the piezoelectric element is pressed against the back surface of the front shell 82 by vertical movement of the clamp plate 86 via 3
9 is attached to the same bracket 89, and the piezoelectric pickup 42 is pressed against the back surface of the head 88 by vertical movement of the clamp plate 41 via the screw rod 40, substantially the same effect as in each of the above embodiments can be obtained. I can do it.

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

The present invention provides a musical instrument having an acoustic body, such as a guitar, in which the pressing force due to the tension of the strings is applied to the string supports, such as the saddles 8, 12,
Through pieces 21 and 27, the top plate of the acoustic fuselage, for example top plate 1,
28. Vibration of strings other than the strings directly above the partial pressure receiving section can be detected to the same extent as the vibrations of the strings directly above the partial pressure receiving section on the partial pressure receiving section line of the pressure receiving section of the top plate that is applied to the head 22. A pickup mounting structure for a musical instrument having an acoustic body equipped with a pickup piezoelectric element having a large pressure-receiving area.

As a result, the present invention has the effect of simplifying the structure and easily capturing the vibrations of each string faithfully.

[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. 8 is a cutaway side view thereof, FIG. 4 is an enlarged cutaway side view of the pickup 5, and FIG. 5 6 is a front view of the second embodiment of the present invention, FIGS. 7 and 8 are front views of other embodiments of the present invention, and FIG. 9 is a broken side view of the metal foil 9. 10 is a perspective view of the eighth embodiment of the present invention,
FIG. 11 is a perspective view of a fourth embodiment of the invention, and FIGS. 12 and 18 are cutaway plan views of other embodiments of the invention. 1, 28.82...Table A 2.18.21.2
7... Piece 8.12... Saddle 4.14.1
5...8 Mi5, 16.17.2B, 29.87.
42...Pickup 6...Piezoelectric element 1
8.19...Slit 22, 88...Head
S1-S14...String special pestle applicant piece 1) Hitoshi

Claims (1)

[Claims] In a musical instrument such as a guitar that has an acoustic body, the pressing force due to the tension of the strings is applied to the top plate of the acoustic body via the string support. A pickup mounting structure for a musical instrument having an acoustic body, characterized in that a pickup piezoelectric element with a large pressure-receiving area is mounted, which can detect vibrations of strings other than those of the strings to the same extent as vibrations of strings directly above the partial pressure-receiving part.