JPS5841597Y2 - Power supply unit for electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a power supply unit used in electronic musical instruments and the like.

Conventional electronic musical instruments have a power supply section, a printed circuit board section on which ordinary electrical components are attached, a heat sink section on which heat generating components are attached,
The connection terminal mounting portions and the like were each independently arranged at predetermined positions within the main body.

For this reason, wiring work between the parts in each of the above parts is difficult.
Furthermore, each part cannot be adjusted until all of these parts have been assembled into the main body.

Further, there are disadvantages in that it takes time and effort to assemble into the main body, and adjustment work is extremely difficult because it is disposed in a narrow space.

This idea was made with the aim of eliminating the above-mentioned drawbacks.The power supply section, printed circuit board section, heat sink section, connection terminal mounting section, etc. are integrated into the same chassis, making it easier to assemble, adjust, and attach them to the main body. The present invention provides a power supply unit for an electronic musical instrument that facilitates the operation.

This invention will be described in detail below based on one embodiment of the accompanying drawings.

In FIG. 1, a side portion 1b at one end of the bottom portion 1a of the chassis 1 is bent upward at a substantially right angle as shown in FIG.

Furthermore, a recess 1c is formed on one side of the bottom 1a of the chassis 1.

As shown in FIG. 2, this recess 1c is formed to protrude from the lower side of the chassis 1.

Heat-generating parts are placed in the side part 1b, and the concave part 1 in the bottom part 1a is
A printed circuit board and power supply parts are attached to the flat plate portion 1a' between the side portion 1b and the side portion 1b, and connectors for connecting terminals are attached to the recessed portion 1C.

Note that the recessed portion 1c will hereinafter be referred to as a connection terminal mounting portion 1c.

A predetermined number of holes (not shown) for attaching parts are bored at predetermined positions in each of these parts.

The chassis 1 having such a shape is integrally formed of a metal plate, for example, an iron plate.

The side portion 1b of the chassis 1 is a heat sink that functions as a heat sink, and various heat generating components such as a power IC 2, a power transistor 3, etc. are mounted on this side portion 1b as shown in FIGS. 1 to 3. and fix it with a screw or the like through the mounting hole.

As shown in FIGS. 1 to 3, the printed circuit board 4 is arranged and fixed on the bottom portion 1a' via a support 5 at a predetermined interval.

The support 5 is made of an insulating material, such as a synthetic resin material, and is formed into a shape as shown in FIG.
By fitting and locking the other end 5b into the hole 1e of the printed circuit board 4, the printed circuit board 4 is insulated and supported on the bottom portion 1a'l as described above.

Then, on this printed circuit board 4, for example, a resistor element 6,
The IC element 7 and other electrical components (not shown) are arranged.

In addition to the printed circuit board 4, power components such as a power transformer 8 and various components such as a terminal board 9 are arranged and fixed on the bottom portion 1a'.

A headphone connector 10, an input/output terminal connector unit 11, a fuse holder 12, and an AC socket 13 are provided on the side part 1d of the connection terminal mounting part 1c, as shown in FIGS. 1 to 3.
etc. are arranged and fixed.

After the above-mentioned parts have been installed, they are connected and adjustments are made to each part.

In this way, the power supply unit 15 of the electronic musical instrument according to this invention is configured.

As shown in FIG. The connecting terminal portion 1c is made to protrude outside the main body.

Then, the connecting terminal portions of the respective connecting terminal components disposed on the side portion 1d of the connecting terminal mounting portion 1c are made to protrude to a predetermined position below the main body 16.

In this way, the power supply unit 15 is assembled into the main body 16.

As explained above, according to this invention, since the chassis is integrated, the power supply unit can be assembled and adjusted as a single unit, and moreover, it can be very easily attached to the main body.

Furthermore, since the power supply unit is disposed in the upper part of the housing, wiring to the key switch circuit, tone circuit, etc. can be simplified.

Further, by providing the connection terminal mounting portion on the chassis, the terminal portion can be formed simply by installing the chassis on the main body.

Further, such a power supply unit has the advantage that it can be applied to various types of electronic musical instruments.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the power supply unit for an electronic musical instrument according to this invention, FIG. 2 is a side view of the power supply unit shown in FIG. 1, and FIG. 3 is a front view of the power supply unit shown in FIG. 1. 4 are explanatory diagrams of the mounting portion of the printed circuit board shown in FIG. 1, and FIG. 5 is a diagram showing the state in which the power supply unit shown in FIG. 1 is attached to an electronic musical instrument. 1...Chassis, 1b...Side part, 1c
...Connection terminal mounting part, 4 ... Printed circuit board, 5 ... Support, 16 ... Electronic musical instrument, 17 ... Shelf board.

Claims (1)

[Scope of utility model registration request] A chassis that integrates a heat dissipation plate section for mounting heat-generating components such as power transistors, a printed circuit board section for mounting printed circuit boards incorporating various electrical components, and a connection terminal mounting section bulged on the bottom. is installed on a shelf board located at the bottom of the clapboard of the electronic musical instrument, and the connecting terminal mounting portion is projected to a lower predetermined position outside the main body of the electronic musical instrument through a hole drilled in the shelf board. A power supply unit for an electronic musical instrument characterized by the following features: