JPS6012140Y2 - Power supply for group learning equipment - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a power supply device for group learning equipment.

For example, electronic musical instruments may be used alone in a general household, or dozens of them may be used on a large scale in a classroom or the like for group learning.

When used alone, power can be obtained from a household outlet, but when used for group study, the number of outlets becomes enormous if each device is connected to an outlet.

Therefore, in electronic musical instruments, as shown in FIG. 1, a separate power supply line is generally provided in reserve to collectively supply power from the parent device to each child device for group learning.

In Figure 1, power supply circuit 1 is the part that takes power from a household outlet when used alone, and plug 2
By plugging into the outlet and turning on the power switch 3, AC voltage is applied to the transformer 7 via the connectors 4 and 5.
supplied to

The voltage taken out from the transformer 7 is then transferred to the rectifying and smoothing section 8.
After being rectified and smoothed by the constant voltage circuit 9, the slave unit 1O-1
(Other slave units 10-2 to 10-n are not shown).

In Figure 1, the connector 12 is connected to the base unit 1 when using group learning.
1 and the slave unit 10-1 are connected, and DC voltage from the master unit 11 is supplied to the slave unit 10-1.

The connector 12 receives the DC voltage -VD supplied from the main unit 11.
C is added to the secondary side of the transformer 7, and the DC voltage -VDC is supplied to each part of the slave device 10-1 via the constant voltage circuit 9.

In this case, current flows from the base unit 11 to the slave unit 10-1 through the path indicated by the dotted line 1.

As mentioned above, there are two conventional power supply paths for electronic musical instruments.
System is available.

However, in the past, as shown in FIG.
When trying to supply voltage from the current flow (dotted line 1
) does not go through a power switch, so power is constantly supplied to each slave unit, which is undesirable.

In other words, if only 40 people attend in a group learning system designed for 50 people, power is also supplied to 10 unused electronic musical instruments, resulting in wasted electricity consumption.

This idea was made in view of the above points, and it is possible to easily switch the power supply system in a power supply device for group learning equipment that has two power supply systems depending on whether it is used alone or for group learning. Moreover, the present invention aims to provide a power supply device for a group learning device in which the power can be turned on and off for each child device when the device is used for group learning.

Hereinafter, this invention will be described in detail based on an embodiment of the accompanying drawings.

FIG. 2 shows an embodiment of this invention with each part separated.

All of these parts are connected by connectors.

In addition, in Fig. 2, there are multiple slave units, one of which is 20-
Only 1 is shown.

The other slave units 20-2 to 20-n are also connected to the base unit 21 via connectors similarly to the slave unit 20-1.

Each part in FIG. 2 will be explained.

In the power supply circuit 23 shown in FIG. 2, the plug 24 is for receiving power from a household outlet (not shown) when used alone.

The transformer 25 transforms the voltage introduced from the plug 24 into an appropriate voltage.

The plug 24 and transformer 25 are connected by a connector 26.

The power switch 30 turns on and off the supply of voltage from the power source to the slave unit 20-1.

A connector 31 is attached to this power switch 30, and when used alone, it is connected to a connector 32 inserted between the plug 24 and the transformer 25 to turn the AC power on and off.

Further, when using group learning, it is connected to the connector 33 of the circuit 27 to turn on and off the power of the main unit 21, as will be described later.

In this embodiment, the portion shown as circuit 27 is constructed on one printed circuit board.

This circuit (hereinafter referred to as a DC voltage supply circuit) 27 includes a rectifying and smoothing circuit 28 that rectifies and smoothes the transformed voltage;
It is constituted by a voltage regulating circuit 29 that makes the rectified and smoothed voltage a constant voltage, and supplies DC voltage to each circuit of the slave device 10-1.

The main unit 21 is used for each child unit 2-1 to 20- when using group learning.
This is a circuit that supplies DC voltage -VD to n.

The DC voltage supply circuit 27 is connected to the power supply circuit 23 and the base unit 2.
1 includes a plurality of connectors for connecting to a power switch 30 and the like.

That is, in the DC voltage supply circuit 27, the connector 33 is connected to the connector 35 attached to the secondary side of the transformer 25 when used alone, and leads the voltage from the power supply circuit 23 to the circuit 27.

Moreover, when used for group learning, it is connected to the connector 31 of the power switch 30.

The connector 36 leads voltage from the main unit 21 to the circuit 27, and when used for group learning, the connector 37 of the main unit 21
connected to.

Note that the connectors 38 and 39 connect the connector 36 and the DC voltage supply circuit 27, and the connectors 40 and 41
Connects the DC voltage supply circuit 27 and other circuits in the handset 20-2, and these are all arranged on the printed circuit board of the DC voltage supply circuit 27.

By the way, in the DC voltage supply circuit, the voltage from the base unit 21 is applied to a position where the current from the base unit 21 flows through the connector 33.

This is so that the power switch 30 can be connected to the connector 33 to turn on and off the voltage from the base unit 21 when using group learning.

In the example of Fig. 2, such a position is P1 in the figure.
．． The location shown in P2 is considered.

However, in this case, the current flows through the rectifying and smoothing circuit 28 via the connector 33 as shown by the dotted line 1.

Therefore, in this invention, a part of the path through which the current flows other than the connector 33 is made into a cuttable wiring (jumper wire) 42.

This jumper wire 42 is arranged on the printed circuit board of the DC voltage supply circuit 27 as shown in FIG. 3 so that it can be easily cut with nippers or the like when used for group learning.

FIG. 4 shows the embodiment of FIG. 2 set up for independent use.

That is, when used alone, the outlet 31 of the power switch 30 is connected to the connector 32, the connector 35 is connected to the connector 33, and the plug 24 is connected to a household outlet.

In this way, the power source (household AC power source) is turned on and off by turning the power switch 30 on and off.

FIG. 5 shows a state in which the embodiment of FIG. 2 is set for use in group learning.

That is, when using group learning, the connector 31 of the power switch 30 is connected to the connector 33, the connector 37 is connected to the connector 36, and the jumper wire 42 is cut with nippers or the like.

In this way, the on/off of the power source (the DC power source of the base unit 21) is controlled by turning on/off the power switch 30.

In addition, the location where the DC voltage -VD from the main unit 21 is applied and the location where the jumper wire 42 is connected are as shown in FIG.
It is also possible to do as shown in FIG. 6a or b.

That is, FIG. 6a shows the DC voltage -■.

The location where is added is the same as in FIG. 1, and a jumper wire 42 is connected between the connector 33 and the rectifying/smoothing circuit 28.

In addition, a jumper wire 42 is connected between the connector 33 and the rectifier/smoothing circuit 28 as shown in FIG.
■It is designed to add o.

As explained below, according to this invention, when used for group learning, voltage from the master unit is supplied via the power switch of each slave unit, so each slave unit can be turned on and off. It can be turned off to prevent unnecessary power consumption even when only some handsets are used.

In addition, switching from single use to group study use can be achieved simply by changing the connection point of the power switch, changing the power supply, and cutting some wiring, so there is no need to add new switches etc. Switching can be performed.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an example of a conventional power supply device for group learning equipment, Fig. 2 is a circuit diagram showing an embodiment of this invention, and Fig. 3 is a printed circuit board showing the DC voltage supply circuit in Fig. 2. Fig. 4 is a circuit diagram showing the embodiment shown in Fig. 2 set to be used alone, and Fig. 5 is a circuit diagram showing the embodiment shown in Fig. 2 set to be used for group learning. FIG. 6 is a circuit diagram showing another embodiment of this invention. 20-1 to 20-n...Slave unit, 21...
...Main unit, 23...Power circuit, 24...
・Plug, 25...Transformer, 27...
・DC voltage supply circuit, 28... Rectifier, smoothing circuit, 29... Constant voltage circuit, 30...
...Power switch, 42...Jumper wire, 26
．． 31, 32, 33, 35, 36, 37, 38.39,
40, 41... Connector.

Claims (1)

[Claims for Utility Model Registration] 1. An AC power supply circuit that supplies AC voltage, a DC voltage supply circuit that rectifies and smoothes the AC voltage and supplies DC voltage to each circuit of the slave unit, a power switch, and the slave unit. a connector for selectively connecting one of the AC power supply circuit or the power switch to the DC voltage supply circuit depending on whether the unit is used alone or for group study; and a DC voltage supplied from the base unit when group study is used. means for supplying voltage to each part of the slave unit via a power switch connected to the connector,
A power supply device for a group learning device capable of cutting off a short-circuit line that shorts a power switch connected to the connector during group learning use. 2. A power supply device for a group learning device according to claim 1, wherein the short-circuit line is wired on a printed circuit board with a jumper wire.