JPS6311857Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a cord reel that is used with commercial power (usually AC 100V) and a car power supply (usually DC 24V or
This relates to a cord reel that can be used with both commercial power and car power and has the ability to be used even with 12V).

To explain the present invention with reference to drawings, Fig. 1 is an explanatory diagram of an embodiment of the cord reel according to the present invention. Inside the cord reel body 1, as shown in the wiring diagram of Fig. 2, there is a plug on the commercial power load side. Switch the energization path to the insertion port 2 and the plug insertion port 3 on the car power load side,
Built-in relay 4. In Figure 1, 5
is a cord, 6 is a plug to be inserted into commercial power supply 7, 8 is a car power adapter, and commercial power supply plug 6
As shown in FIG. 3, since the adapter 8 cannot be directly inserted into the car power source 9, the adapter 8 is connected to the insertion plug 6 and then inserted into the car power source 9. 10
is a rotor of the reel body, and an insertion port 3 for a plug 11 on the car power load side is provided in this rotor portion. Reference numeral 12 denotes a plug on the commercial power supply load side, and an insertion port 2 for this plug 12 is provided in the reel rotor. 13 is a knob that turns the rotor 10 and winds up the cord 5. In the illustrated example, the electric circuit switching relay 4 built into the cord reel body operates when commercial power (100 VAC) is applied, opens the energizing contact 15 to the car power supply load side circuit 14, and pressurizes the car power supply (24 VDC or 12 V). In this case, the contact 15 is closed without operating. In the illustrated example, the contact 15 is inserted into only one of the current-carrying circuits a, but since it is a relay that opens and closes both the current-carrying circuits a and b, the same contact 15 as shown is inserted into the other circuit b, although not shown. is also inserted.

Figure 2 shows a state in which the plug 6 is inserted into a 100V commercial power supply, and the relay 4 is activated by applying 100V to open the energizing circuit to the car power supply load side, and energizes only the commercial power supply load side. . FIG. 3 shows a car power supply 9 with an adapter 8 connected to an insertion plug 6.
This shows the relationship between relay 4 and contact 15 when inserted into the car. In this case, the voltage of the car power supply is lower than the voltage of the commercial power supply, so relay 4 does not operate, contact 15 is closed, and the car The energizing circuit to the power supply load side is closed. Therefore, plug 1 is inserted into insertion port 3.
1, the car power supply voltage from the car power supply can be taken out to the load side.

In the connection shown in FIG. 3, the car power supply voltage is applied to the plug insertion port 2 of the commercial power supply load, but since the voltage is lower than the commercial power supply voltage, there is no danger. Figure 4 shows the energizing circuit 1 to the plug insertion port 2 on the commercial power load side.
This wiring diagram shows a wiring diagram in which a relay contact 17 is provided at 6 to prevent the car power supply voltage from being applied to the plug insertion port 2.This contact 17 operates when commercial power supply voltage is applied to the relay 4, and the contact is closed. Close 17,
When the car power supply voltage is applied to the relay 4, the relay does not operate and the commercial power supply load side energizing circuit 16
The contact 17 is kept open. Similar to the contact 15 of the car power supply load side energizing circuit, two contacts 17 are used to open and close both lines of the circuit. The illustrated contact 17 is for only one line a, but a similar contact 17 is inserted for the other line b.

As described above, the present invention incorporates a relay that operates on commercial power into a cord reel that is used with normal commercial power (AC100V), and also provides a plug insertion port for the car power load, so that the cord reel's power supply side plug can be connected to a commercial power source. When inserted into the power supply, the car power supply load side energizing circuit is automatically disconnected, and only the commercial power supply side energization circuit is energized. When the cord reel's power supply side plug is inserted into the car power supply, the car power supply side is energized. Since the circuit can be closed and the car power supply voltage can be supplied to the load side, one cord reel can be used for both general use and car use, eliminating the need for dedicated cord reels for each. It is economical, has a simple structure, and has great practical effects.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the embodiment of the cord reel according to the present invention, and Figure 2 shows the wiring diagram inside the cord reel. condition). Figure 3 is an internal wiring diagram of the cord reel when using a car power supply (car power supply load side energizing circuit is closed). FIG. 4 is a wiring diagram in which the car power supply voltage is not applied to the commercial power supply load side energizing circuit when the car power supply is used. 1... Cord reel body, 2... Plug insertion port on the commercial power load side, 3... Plug insertion port on the car power load side, 4... Electric circuit switching relay, 5... Cord,
6...Commercial power supply side plug, 7...Commercial power supply, 8...
...Car power adapter, 9...Car power supply, 10
... Reel rotor, 11 ... Car power supply load side plug, 12 ... Commercial power supply load side plug, 13 ...
...Knob for winding the cord, 15... Opening/closing contact of the car power supply load side circuit, 17... Opening/closing contact of the commercial power supply load side circuit.

Claims (1)

[Scope of utility model registration request] The main body of the cord reel used with commercial power supply (AC100V) has a built-in relay for switching the electrical circuit, which operates on commercial power supply voltage and does not operate on lower car power supply voltage, and a plug for car power load is inserted into the reel. If the power supply side of the cord reel is inserted into a commercial power supply, the relay will operate, opening the car power supply load side energization circuit, closing the commercial power supply load side energization circuit, and opening the power supply side of the cord reel. A cord reel that can be used for both commercial power and car power when inserted into the car power supply via an adapter, the relay will not operate and the car power supply load side energizing circuit will be closed.