JPS584155Y2 - electric string instrument pickup - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pickup for an electric string instrument such as an electric guitar.

Conventionally, for example, as a pickup for an electric guitar, a pickup of the type provided in two sets as shown in FIGS. 1 and 2 is known.

It is clear that in this case, high output can be obtained by increasing the number of turns of coils a and b or the magnetic flux of magnet C.

However, increasing the number of windings is not only limited when the size is limited like an electric guitar, but also causes the anti-resonance point (peak frequency) to drop and make it impossible to obtain high frequencies. Case d also caused resonant vibrations, causing problems such as a so-called howling phenomenon.

The purpose of the present invention is to provide a high-output pickup free of such inconveniences, and the present invention uses two unit bodies A and B in which a plurality of pole pieces 2a...2f are set in a coil bobbin 1. In the type in which permanent magnets 3 are arranged side by side and located on the lower surface of both unit bodies A and B, and between the left and right pole pieces 2a...2f, the left and right pole pieces 2a...
- A permanent magnet 4 is provided on one or both of the outer sides of the coil bobbins 1, 1, and a metal film 6 is provided on at least the outer peripheral surface of both the coil bobbins 1, 1.
These metal films 6, 6 are grounded.

3 and 4 show one embodiment, in which a permanent magnet 4 is provided on the outside of the left pole piece 2a...2f, an auxiliary yoke T is provided on the right side, and the right pole piece 2a is provided with an auxiliary yoke T. ...2F was constructed into a bolt and screwed into it.

8 is a bottom plate made of a non-magnetic material.

9a...9f indicate metal shells.

The coils 1a, 1)+ of each bobbin 1, 1 are fixed by impregnating them with paraffin, wax, alcohol-based impregnation liquid, etc. to prevent vibration, and a thin aluminum or other metal film 6 is wrapped around the outer circumferential surface of the coils 1a, 1)+. It was blocked.

In this embodiment, two main closed magnetic circuits 10 and 11 are constructed as shown in the figure.

In this way, compared to conventional types, a larger magnetic force acts and higher output can be obtained.

As mentioned above, the coil 1a, 1)) is fixed with paraffin or the like to prevent its resonance vibration, and the metal film 6
, 6 and grounded, so that the howling phenomenon that occurs when the number of turns of the coil is increased in the conventional type does not occur.

In addition, harmonic components did not decrease (this is because the anti-resonant frequency and the number of turns of the coil are generally inversely proportional to each other).

) The ones shown in Figure 5 are the left and right pole pieces 2a...2
Permanent magnets 4, 4 are provided on both sides of f to create three main closed magnetic circuits 1.
0,11.12 to further increase the overall magnetic force.

In other respects, there is no difference from the cases shown in FIGS. 3 and 4.

FIG. 6 shows still another embodiment, in which the left and right pole pieces 2a, . . . , 2f are constructed with bolts, respectively, and are screwed into screw holes 18 in the bobbins 1, 1.

Therefore, there is no need for an auxiliary yoke, and the number of parts can be reduced.
Magnetic loss is reduced accordingly, and therefore, even higher output can be obtained than in the embodiment shown in FIG.

In other respects, there is no difference from the case shown in FIG.

FIG. 7 shows the structure shown in FIG. 6 covered integrally with synthetic resin.

As described above, the pickup of this invention has a higher output than the conventional type, so it can be used in the following ways.

That is, by connecting both coils 1a and 1b as shown in Figure 7, it is possible to selectively take out the output in series, take out the output from each separately, or take out the output from only one.
You can get three types of tones.

Furthermore, when two of the pickups of this invention are connected as shown in Figure 9, it is possible to obtain the same or different sounds at the same time by opening and closing switches S1 and S2, and by switching the selector switch S3. It is possible to obtain various tones such as being able to obtain in-phase or out-of-phase sound.

In this way, when using the present invention, the left and right pole pieces 2
Since a permanent magnet 4 is provided on one or both of the outsides of a...2f, and metal films 6, 6 are attached to at least the outer peripheral surfaces of both bobbins 1, 1 to ground them, a high output can be obtained, and There is no howling phenomenon that occurs when the number of turns of the coil is increased in the conventional type, and there is no reduction in harmonic components. Therefore, the output can be extracted from each coil independently, producing a variety of tones. There are effects such as being able to obtain

[Brief explanation of the drawing]

Figure 1 is a plan view of a conventional pickup, and Figure 3 is its ■
3 is a plan view of an example of the implementation of the present invention, FIG. 4 is a sectional view taken along the TV-IV line, and FIGS.
The figure shows a cutaway side view of each embodiment, and FIGS. 8 and 9 show circuit diagrams of the pickup in use. 1... Coil bobbin, 2a...2f...
...Pole piece, A, B...Unit, 3,4
...Permanent magnet, 6...Metal film.

Claims (1)

[Scope of utility model registration request] A plurality of pole pieces 2a...2 in the coil bobbin 1
Two unit bodies A and B, each with an erected structure f, are arranged side by side, and left and right pole pieces 2a...
In the type in which a permanent magnet 3 is provided between 2f, a permanent magnet 4 is provided on one or both of the outer sides of the left and right pole pieces 2a...2f, and a metal film 6 is provided on at least the outer peripheral surface of both coil bobbins 1, 1. A pickup for an electric stringed instrument is made by adhering metal films 6, 6 to ground.