JPH048583Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field of the invention) The invention relates to a Matsuto switch, and uses a printing section formed on the back side of the cover sheet to prevent static electricity from being generated between the cover sheet and the sheet it comes into contact with. This is how it was done.

(Background of the invention) A Matsuto switch is known in which an upper sheet and a lower sheet are stacked on top of each other with a sheet-like spacer in between, and a cover sheet is attached to the top of the upper sheet. In this type of pine switch, when a predetermined part of the cover sheet is pressed by stepping on it with a foot, the electrode part on the lower surface of the upper sheet and the electrode part on the upper surface of the lower sheet come into contact and become electrically conductive. However, each of the above sheets is generally made of a material with a high dielectric constant such as synthetic resin, so when the sheets rub against each other when pressed, it is easy to generate a large amount of static electricity, and this static electricity can destroy electrical elements. There were problems such as being exposed to electric shock to the limbs that pressed against it.

(Purpose of the invention) The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a pine switch that can prevent the generation of static electricity due to friction between sheets. More specifically, it is an object of the present invention to provide a pine switch that can utilize the printed portion formed on the cover sheet of this type of pine switch as a means for preventing the generation of static electricity.

(Summary of the invention) The present invention is a Matsuto switch in which an upper sheet on which electrode parts are formed and a lower sheet are stacked with a spacer in between, and a transparent cover sheet is attached to the top of the upper sheet. A printing part made of a binder mixed with fine particulate pigment is formed on the back surface, and the pigment protruding from the surface of the binder is brought into contact with the sheet. With this structure, a particulate pigment that does not easily generate static electricity is interposed between the cover sheet and the sheets, thereby preventing the sheets from directly rubbing against each other and generating static electricity.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings, taking a matsu switch applied to a foot-operated musical instrument as an example.

1 and 2 are a perspective view and an exploded perspective view of a foot-operated musical instrument 1, which consists of a rectangular sheet-shaped matsuto switch 2 and a main body 3 attached to its corner. . The case 32 of the main body 3 includes an upper case 32a and a lower case 32b.
are connected by screws 36, and an IC 22 for driving the speaker 31 and a power battery 33 are disposed inside the speaker. Reference numeral 27 denotes a mounting portion of the main body portion 3 cut out at the corner of each sheet.

Matsuto switch 2 has upper sheet 4 and lower sheet 5
are placed one on top of the other with a sheet-like spacer 6 in between, and a decorative cover sheet 9 and a back cover sheet 10 are attached to the upper and lower parts, and the periphery is sewn with sewing thread 19.
It is formed by suturing. The cosmetic cover sheet 9 and the back cover sheet 10 are made of vinyl chloride resin, and a musical scale such as do-re-mi is drawn on the bottom surface of the cosmetic cover sheet 9 to indicate the foot pedals 7, 7... . The upper sheet 4 is made of polyethylene resin, and an electrode portion 8 is formed on the lower surface thereof by pasting a conductive sheet or applying aluminum vapor deposition. The spacer 6 is made of a porous elastic material such as foamed urethane resin, and has small holes 11a, 11a in the portions corresponding to the foot pedals 7, 7...
... are intensively drilled to form conductive portions 11, 11.... The lower sheet 5 is made of polyester resin, and electrode portions 12a, 12a, .
are formed independently from each other (10 in this embodiment), and when the foot pedals 7, 7... are stepped on, the electrode section 8 and the electrode sections 12a, 12a... are connected to the conductive section 11.
The speaker 31 makes contact with the speaker 31 through the speaker 31, and a sound of a predetermined pitch is emitted from the speaker 31.

The do-re-mi... of the foot stepping parts 7, 7... are drawn by gravure printing. Gravure printing paints generally use binders such as synthetic resins, cellulose, rubber derivatives, toluol, xylene, etc.
It is made by dissolving it in a volatile solvent such as gasoline and kneading the pigment into it. In this embodiment, the binder is used to ensure strong adhesion to the cover sheet 9, and to prevent the paint from peeling off even if the foot pedals 7, 7... are stepped on.
The same material, vinyl chloride resin, is used.
Pigments can be either inorganic or organic, and fine particulate inorganic pigments with low dielectricity, such as titanium oxide, zinc oxide, cadmium yellow, and chromate, are preferable. Of course, it is possible to suppress this by using organic pigments, but in this case, it is more effective to include powders of copper, aluminum, carbon black, etc.

FIG. 3 shows a cross section of the printed part 15 printed on the back side of the cover sheet 9. The cover sheet 9 is made of transparent or translucent vinyl chloride resin that can be seen through, and the printed part 15 is seen through from above. can. 13 is a binder, and 14 is a pigment. The pigment 14 is mixed in the binder 13 as fine particles, but a part of it protrudes from the surface of the binder 13 and comes into contact with the upper sheet 4. In this way, the pigment 14 By interposing the cover sheet 9 and the sheet 4, direct sliding contact between them prevents static electricity from being generated between them.

(Effect of the invention) As explained above, in the present invention, the printing part 15 made of the binder 13 mixed with the fine particle pigment 14 is formed on the back surface of the cover sheet 9 that contacts the sheet 4. The pigment 14 inside comes into contact with the sheet 4, and it is possible to prevent the cover sheet 9 and the sheet 4 from coming into direct sliding contact and generating static electricity between them.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
The figure is a perspective view of the foot-operated musical instrument, FIG. 2 is an exploded perspective view, and FIG. 3 is a partial sectional view. 2...Matsuto switch, 4...Top sheet, 5...
...Lower sheet, 6...Spacer, 9...Cover sheet, 13...Binder, 14...Pigment, 15...
...Printing Department.

Claims (1)

[Scope of utility model registration request] In a mat switch, an upper sheet 4 and a lower sheet 5 on which electrode portions 8 and 12a are formed are stacked with a spacer 6 in between, and a transparent cover sheet 9 is attached to the upper part of the upper sheet 4. A printed portion 15 consisting of a binder 13 mixed with a fine particulate pigment 14 is formed on the back surface, and the pigment 14 protruding from the surface of the binder 13 is printed on the sheet 4.
A Matsuto switch characterized by being brought into contact with.