JPS6226797Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a pickup device for stringed instruments such as guitars that compensates for variations in output level due to the acoustic characteristics of the instrument itself, differences between strings, etc., and can emphasize specific string vibrations. Regarding.

In general, electric stringed instruments such as electric guitars,
By placing multiple pick-up devices with the same characteristics in correspondence with each string, these pick-up devices pick up the vibrations of each string independently and convert them into electrical signals. When output, all electrical signals are sent to the signal processing circuit via a common lead wire, so it is possible to compensate for variations in output level due to the characteristics of the instrument itself or differences between strings, or to suppress only specific string vibrations. It was difficult to adjust the strings, or to use a playing method that produced clear electric chords while attacking the entire string.

Recently, as a means to solve this problem, a signal sending lead wire is connected to each pick-up device, and the electrical signals from each pick-up device are taken out independently from each other, thereby reducing the variation between strings. Also, an invention has been proposed (for example, Japanese Patent Publication No. 54-4250) in which the output of each string is adjusted. However, even with electric guitars that use such a pickup device,
Depending on the performance method, a mixing circuit is required, which simply makes the electric circuit unnecessarily complicated.Moreover, the string vibration transducer bridge disclosed in the aforementioned Japanese Patent Publication No. 54-4250 requires a single mixing circuit. Since the pickups corresponding to each string are commonly placed on the bridge base, the vibrations of each string are transferred to each other, so the adjustment range mentioned above is almost impossible, and although the structure is complex, it is not enough. It has the disadvantage that no expected effects can be expected.

This idea was made in view of the above circumstances,
With an extremely simple configuration in which the characteristics of each pickup device itself are varied by appropriately changing the size and placement position of the piezoelectric element, it is possible to adjust and specify variations in output due to the characteristics of the instrument itself and differences between strings. The present invention provides a pickup device for a stringed instrument such as a guitar, which is capable of emphasizing string vibrations.

This invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of a pickup device for a stringed instrument according to the invention, and FIG. 2 is a perspective view showing the main components of the device.
In these figures, a lower bridge 2 is adhesively fixed to a predetermined location on the surface of a soundboard (top board) 1 that forms the resonance body of a stringed instrument, and a string pillow is inserted into a recess 3 formed on the upper surface of the lower bridge 2. A pickup device 4 constituting the device is housed through a case 5.

The pick-up device 4 has "+" on both sides.
and a piezoelectric element 7 to which "-" electrodes 8 and 9 are respectively connected, and a string support member 10 made of epoxy resin or the like and whose top surface commonly supports all the strings, for example, six strings 6. It is formed by integral molding, and the number of piezoelectric elements 7 is the same as the number of strings 6. They are arranged in parallel in correspondence with each other and are embedded within the string receiver member 10.

In this case, each of the piezoelectric elements 7a to 7f has a different thickness depending on the output difference of the strings 6, as shown in FIG. That is, in the case of an electric guitar, the first string is the thinnest and the outer diameter increases as it reaches the sixth string, so the output varies considerably between strings, and in order to compensate for this and make it uniform, each piezoelectric element 7a to 7f is used. The thickness is changed little by little so that it is maximum on the 1st string side and minimum on the 6th string side. Note that the area (area of the electrode bonding surface) of each piezoelectric element 7a to 7f is set to be the same.

The "+" and "-" electrodes 8 and 9 are formed in a long plate shape so as to extend in common to correspond to all the piezoelectric elements 7a to 7f, and correspond to all the piezoelectric elements 7a to 7f.
A portion corresponding to 7f is joined to each piezoelectric element 7a to 7f by soldering, conductive adhesive, or the like. The width of the "-" electrode 9 is set to be sufficiently larger than the "+" electrode 8. Then, a lead wire 11a is attached to one end of the "+" and "-" electrodes 8, 9,
One end of the lead wire 11b is connected by soldering or the like, and the other ends of the lead wires 11a and 11b pass through the case 5, the lower bridge 2, and the soundboard 1, are guided into the resonator body, and then led out to the outside. connected to an electrical circuit. The case 5 is made of a conductive metal and is kept at the same potential as the "-" electrode plate 9.
In this case, instead of the case 5, the outer surface of the string receiving member 10 may be coated with a conductive paint or the like.

Therefore, in an electric guitar equipped with such a pickup device 4, when a certain string 6 is plucked to vibrate, the vibration of the string 6 is caused by the piezoelectricity corresponding to the vibrating string 6 via the string receiving member 10. is transmitted to the sexual element 7. As a result, an electrical signal corresponding to the string vibration is generated between the "+" and "-" electrodes 8 and 9, and this electrical signal is led to the signal processing circuit via the lead wires 11a and 11b and amplified. After that, an electric sound is emitted from the speaker.

FIGS. 3a and 3b are diagrams showing the relationship between the thickness and output of the piezoelectric element 7, and the relationship between the area (electrode bonding surface) and output. As is clear from figure a, as the thickness increases, the output also increases in a curved manner, so as mentioned above, 1
If the thickness of each piezoelectric element 7a-7f is gradually decreased from the string side to the 6th string side, each piezoelectric element 7a-7
The output of f can be made almost uniform.

In this case, for example, as shown in FIG. 4, even if the thickness of each piezoelectric element 7a to 7f is constant and only the area is gradually decreased from the 6th string side to the 1st string side, it is clear from FIG. 3b that the above embodiment It will be obvious that the outputs of the piezoelectric elements 7a to 7f can be made uniform in the same manner as in FIG.

For example, if you want to adjust the output to match the characteristics of the instrument itself, correct variations in output between strings, or want to obtain an output that matches the player's preference, use the method shown in Figure 5. The thickness, area, mounting position, etc. of each piezoelectric element 7a to 7f may be changed as appropriate.

As explained above, the pick-up device for stringed instruments such as guitars according to this invention has a plurality of piezoelectric elements each having different characteristics by appropriately changing the size, mounting position, etc. Since it is arranged and configured for each string,
Adjust the output according to the characteristics of the instrument itself,
It is possible to correct variations in output between strings, and even adjust the output for each string according to the player's preference, producing excellent effects never seen before.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of a pickup device for a stringed instrument according to this invention, Fig. 2 is a perspective view showing the main components of the device, and Figs. 3a and 3b show a piezoelectric element. The characteristics diagram, FIGS. 4 and 5, are perspective views of main components showing other embodiments of this invention. 4... Pickup device, 6... String, 7... Piezoelectric element, 8, 9... Electrode, 10... String receiving member.

Claims (1)

[Claims for Utility Model Registration] (1) The device is equipped with a plurality of piezoelectric elements, one of which is arranged corresponding to each string, and each piezoelectric element has different characteristics. A pick-up device for a stringed instrument such as a guitar, characterized in that an electrode is bonded to a piezoelectric element. (2) each of the electrodes is formed into a long plate shape so as to extend commonly to all piezoelectric elements;
A pickup device for a stringed instrument such as a guitar as claimed in claim 1, wherein the pickup device is connected to each piezoelectric element at a portion corresponding to each piezoelectric element.