JPH02192000A - Input device for electronic percussion instrument - 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] [Technical field of invention] The present invention relates to an input device for an electronic percussion instrument.

[Prior art and its problems] Conventionally, electronic percussion instruments such as electronic drums have a piezoelectric element on the bottom surface of a flat wood that transmits vibrations, and a rubber bat on the top surface. , the wood was vibrated and the vibrations were converted into electrical signals using a piezoelectric element.

However, since the above-mentioned devices use piezoelectric elements, there are problems in that the electronic circuit and mounting structure are complicated, the number of parts is large, and the cost is high.

Furthermore, the structure described above requires a lower case to prevent the wood and the piezoelectric element from being exposed below, and also requires a means to protect the piezoelectric element.

[Object of the Invention] This invention was made in consideration of the above-mentioned circumstances, and its purpose is to have a simple structure, a small number of parts, to be manufactured at low cost, and to be electrically An object of the present invention is to provide an input device for an electronic percussion instrument with high reliability of conductivity.

[Summary of the Invention J] In order to achieve the above-mentioned objects, the present invention includes an insulating elastic body that is operated by impact, a conductive elastic body laminated on the lower surface of the insulating elastic body, and a contact pattern on the upper surface. is interposed between the circuit board and the conductive elastic body, and when the insulating elastic body is struck, a part of the conductive elastic body generates electricity with respect to the contact pattern. The main point is that the insulator has an insulator having a space to allow contact between the two.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

The figure shows an electronic drum.The electronic drum is in a musical instrument case.
It is equipped with two drum parts on the left and right sides of the instrument, and by hitting these with a stick or the like, a percussion instrument sound is emitted.In the instrument case l, from the bottom, there are a base board 2, a circuit board 3, a rubber pad 4. 4. Sheet 5.5, Rubber top 6.
6 are arranged in a stacked manner.

The musical instrument case 1 has the above-mentioned parts built into it, and is made of synthetic resin and has a thin rectangular box shape with an open bottom.The top surface of the musical instrument case 1 has two hexagonal openings 1a, 1a on the left and right sides. is formed. Further, on the inner upper surface of the musical instrument case l, mounting columns 1b for screw fixing and protruding columns 1c for positioning are integrally formed, respectively. The mounting pillar 1b for fixing with screws is the circuit board 3
This is to position the baseboard 2 to the instrument case 1, and to attach the baseboard 2 to the instrument case 1.
A screw hole 1d is formed in the center of each of the holes. Protruding column 1 for positioning
C... is for positioning the rubber pad 4.4 and the sheet 5.5, and is provided near the openings 1a, la.

The rubber tops 6.6 are sheets made of EDPM rubber, etc., and are adhered to the sheets 5.5 with double-sided adhesive tape 7.7, and are placed in the openings 1a and la of the musical instrument case l and exposed on the top side. There is.

The sheet 5.5 is a polyester film and is formed larger than the above-mentioned rubber top 6.6, and holes 6ae and fists are provided at predetermined locations for inserting protruding columns 1cφ and φ for positioning the musical instrument case l, respectively. It is positioned by these and placed on the inner surface of the musical instrument case l.

Each rubber pad 4.4 is formed by integrally molding a conductive rubber 4b under an insulating rubber 4a, and a large number of insulating small protrusions 4c are arranged vertically and horizontally on the lower surface of the conductive rubber 4b. . The insulating rubber 4a is an insulating elastic body, the conductive rubber 4b is a conductive elastic body, and the insulating small protrusions 4c.
... constitutes an insulator. At a predetermined location of the rubber pad 4.4, there is a protruding column Ice for positioning.
Hole 4d...-1 for insertion and mounting post t for screwing
Relatively large circular holes 4e and 4e into which the parts b and 1b fit loosely are provided, respectively, and are positioned by these so that they are placed on the inner surface of the instrument case 1 with the sheet 5.5 in between. . In addition, each small protrusion 4C mentioned above...
As shown in FIG. 2, φ is an extremely thin dot-like projection formed by printing an insulating material on the entire lower surface of the conductive rubber 4b.

The circuit board 3 has two large comb-shaped contact patterns 8 on the top surface.
．． 8, and at its predetermined locations there are protruding pillars IC for positioning and mounting pillars 1b for fixing with screws.
A hole 3a for insertion is provided and is placed under the two rubber pads 4.4. In this case, the contact patterns 8.8 are comb-shaped copper patterns printed with carbon on the surface, and each has the same hexagonal shape as the rubber top 6.6, and the intervals between each pattern are set by the rubber pads. The small protrusions 4c of No. 4 are formed smaller than the interval between the bases. Therefore, normally (when no impact operation is performed), the contact pattern 8.8 faces the conductive rubber 4b, 4b of the rubber pad 4.4 with a predetermined gap therebetween by means of the small insulating protrusions 4C...φ. But the rubber top is 6.6
When the rubber pad 4.4 is hit with a stick or the like, the rubber pad 4.4 of the hit portion is pushed down, so that the conductive rubber 4b, 4b of the rubber pad 4.4 is connected to each small protrusion 4C...
Contact is made through the space formed between them, and as a result, a predetermined electrical signal is output by electrical contact between this contact pattern 8.8 and each small protrusion 4C@e-.

The baseboard 2 reinforces the circuit board 3 and holds the rubber pads 4.4 and sheets 5.5 placed thereon in the musical instrument case 1 at once, and is made of wood or synthetic resin. The screw insertion hole 2a is located at the location corresponding to the mounting column 1b for screwing the instrument case l.
... is provided. This screw insertion hole 2 a-e
The fist is a hole through which the screw 9...work is inserted, and the upper side is a large diameter part into which the lower part of the mounting column ib-Φ fist is inserted.
When the screws 9@11# are screwed through the screw insertion holes 2a and into the respective screw holes 1d and 1111 of the mounting columns ib of the instrument case L and tightened, the base board 2 is securely attached to the circuit board 3. , the rubber pads 4.4 and the sheets 5, 5 are pressed into the musical instrument case l.

According to the electronic drum configured as described above, after the rubber top 6.6 is adhered to each sheet 5.5 with double-sided adhesive tape 7.7, the rubber top 6.6 is attached to each opening from the inside of the musical instrument case 1. 1a and la, the sheet 5.5 is positioned and arranged on the inner surface of the musical instrument case l, and the rubber pad 4.4, the circuit board 3 and the base board 2 are placed below it.
Position and arrange the screw insertion holes 2a of the baseboard 2.
If you screw the 9 m screws into each screw hole 1d of the mounting column 1b of the instrument case L through the
Since it can be tightened at once, it is extremely easy to assemble. In this case, the rubber pads 4.4 are provided with relatively large circular holes 4e that loosely fit into the mounting columns 1b of the musical instrument case 1, so even if the vista φΦφ is strongly tightened, the rubber pads 4.4. 4 does not bend and can be installed well.

In particular, in the electronic drum as described above, the rubber pad 4 is formed by integrally molding the conductive rubber 4b under the insulating rubber 4a,
Insulating small protrusions 4c* are provided on the bottom surface by printing, and a contact pattern 8 of the same size as the rubber top 6 is provided.
is provided on the circuit board 3, so that no matter which part of the rubber top 6 is hit with a stick or the like, the rubber pad 4 of the hit part will be pushed, and the corresponding part of the conductive rubber 4b will be released into each small protrusion 4C. Since the contact pattern 8 is always contacted through the space formed between the parasols, an electric signal can be reliably obtained.

Further, in the electronic drum as described above, since the rubber top 6 is provided on the rubber pad 4 via the sheet 5,
The durability of the rubber pad 4 is improved, and the life of the entire musical instrument can be extended. Moreover, by pasting the rubber toe/pro on the sheet 5 made of polyester etc., the opening of the musical instrument case 1 is
Since the rubber top 6 is arranged within the space a, the rubber top 6 can be stretched well without bending, and the rubber top 6 will not bend due to temperature changes.

[Effects of the Invention] As explained above, according to the input device for an electronic percussion instrument according to the present invention, an insulating elastic body to be percussed and a conductive elastic body laminated on the lower surface of the insulating elastic body. , a circuit board having a contact pattern on its upper surface, and a circuit board interposed between the circuit board and the conductive elastic body, and when the insulating elastic body is subjected to a striking operation, the conductive elastic body An insulator having a space to allow a part of the material to make electrical contact with the Not only can an electrical switch mechanism be constructed with this structure, but the number of parts used is small, so
This has advantages such as being able to be manufactured at low cost and providing an input device with high reliability of electrical continuity between the conductive elastic body and the conductive pattern.

・Insulating rubber, ・Small protrusion, 8・ 4b0.・Conductive rubber, 4c・ fist contact pattern.

Casio Computer Co., Ltd.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is an external perspective view of an electronic drum according to the invention, FIG. 2 is an exploded perspective view of the electronic drum shown in FIG. 1, and FIG. 3 is the same as the one shown in FIG. I-I in
FIG.

Claims (3)

[Claims] (1) An insulating elastic body that is operated by impact; a conductive elastic body laminated on the bottom surface of the insulating elastic body; a circuit board having a contact pattern on the top surface; this circuit board and the conductive elastic body an insulator having a space interposed between the insulating elastic body and allowing a part of the conductive elastic body to come into electrical contact with the contact pattern when the insulating elastic body is subjected to a striking operation; An input device for an electronic percussion instrument, comprising: and. (2) The input device for an electronic percussion instrument according to claim 1, wherein the insulator is formed by printing on the lower surface of the conductive elastic body on the circuit board side. (3) The insulator is formed by distributing a large number of insulating protrusions vertically and horizontally on the lower surface of the conductive elastic body on the circuit board side. An input device for the electronic percussion instrument described above.