JP2591846Y2 - Illumination-sensitive table tap - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table tap for supplying AC power to electrical appliances, and more particularly to a table tap having a function of turning on and off the supply of AC power in accordance with ambient illuminance.

[0002]

2. Description of the Related Art Originally, a power strip is for distributing AC power received from a power outlet in a room through a plug to electric appliances from a plurality of outlets.

[0003]

[Problems to be Solved by the Invention] When an electric appliance is used, the user often forgets to turn off the power after use. In the case of the above-mentioned power strip, which is merely a relay device of a power supply, if the power supply is forgotten to be turned off, the electric appliance is left in an energized state. In this case, electric carpets, electric diapers, etc., which consume a lot of power, consume power unnecessarily, and fan heaters, irons, etc. may cause fires and other disasters. It is rare.

The present invention has been made in consideration of the above-described demands, and has as its object to provide a power strip capable of turning on and off power supply according to the brightness of a room so as to cope with forgetting to turn off a power switch.

[0005]

According to the present invention, a table tap has an illuminance sensor for detecting light and darkness, and a sensitivity setting means having an adjustment volume for freely setting a sensitive illuminance of the illuminance sensor. A relay for supplying AC power, and a power supply control circuit for automatically turning on and off the relay in accordance with the set sensitive illuminance, so that the relay does not respond to a change in illuminance within a predetermined time. It has an on-delay timer function.

In addition, a relay holding circuit having a reset button for preventing the relay from turning on again even if the relay becomes bright after the relay is turned off is provided.

[0007]

[Work] With such a configuration, the relay is turned on to supply AC power when it becomes bright, and the relay is turned off and the AC power is stopped when it becomes dark. In addition, when the adjustment volume is operated, the sensitive illuminance of the illuminance sensor changes, so that the setting illuminance for supplying and stopping the AC power can be changed.

Further, if a relay holding circuit having a reset button is provided, the relay holding circuit operates by operating the reset button. Therefore, after the relay is turned on and the AC power supply is stopped, the relay is turned on again even if it becomes bright. Since it does not turn off, no AC power is supplied.

[0009]

1 is an external structural view of an illuminance-sensitive table tap 1 according to the present invention. Reference numeral 2 denotes an illuminance sensor (for example, a cds cell) for sensing ambient illuminance, and has an adjustment volume 3 for setting a sensitive illuminance adjustment of the illuminance sensor 2. In addition, there are an operation switch 4 and a reset button 5 for operation switching. Reference numeral 7 denotes a power supply plug, 6 denotes a power supply outlet, and the AC power input from the plug 7 is controlled by a power supply control circuit 15 built in the illuminance-sensitive type power strip 1 to supply power. It can be taken out from.

FIG. 2 shows the configuration of the power supply control circuit 15 of the illuminance-sensitive table tap 1 described above.

In FIG. 2, AC power applied to the power supply plug 7 is supplied to break contacts 91 and 9 of the electromagnetic switch 9.
Power is supplied to the outlet 6 via the power supply 2 and serves as a power supply source of the electric appliance to be used. The electromagnetic switch 9 is connected to a power supply via the operation switch 4 and make contacts 81 and 82 of the relay 8.

Reference numeral 13 denotes an AC-DC converter for generating a DC power supply used for the power supply control circuit 15. In the present power supply control circuit 15, an illuminance sensor 2 for illuminance detection and an adjustment volume 3 are connected in series, further divided by a resistor 12 and connected to the transistor 10, thereby forming sensitivity setting means. A transistor 11 for driving the relay 8 is connected to the output of the transistor 10, and a make contact 83 of the relay 8 and a holding circuit 16 of the relay 8 by the reset button 5 are formed on the output side. .

The operation of the power supply control circuit 15 will be described with reference to the timing chart of FIG.

In FIG. 3, the transistor 10 is for detecting a change in illuminance, and its on / off is determined by a change in the resistance value of the illuminance sensor 2. When the surroundings are dark, the illuminance sensor 2 indicates a high resistance value, and the transistor 10 is turned off by the divided voltage with the resistor 12, and when the surroundings are bright, the illuminance sensor 2
Indicates a low resistance value, and the resistance value of the resistor 12 is set so that the transistor 10 is turned on by the divided voltage with the resistor 12.

When the surroundings are dark, as described above, the transistor 10 is turned off, the transistor 11 in the next stage is turned on, and the relay 8 is turned on. When the relay 8 is turned on, the contact 8
1 and 82 are closed, the electromagnetic switch 9 is also turned on, and the contacts 91 and 9 are closed.
2 is opened, so that no AC power is supplied to the outlet 6. When the brightness increases, the transistor 10 is turned on, the transistor 11 at the next stage is turned off, the power supply to the relay 8 is stopped, the relay 8 is turned off, the contacts 81 and 82 are restored, and the electromagnetic switch 9 is turned off. , And the contacts 91 and 92 return, so that the AC power is supplied to the outlet 6. or,
Turning the adjustment volume 3 connected in series to the illuminance sensor 2 changes the illuminance change detection level due to the divided voltage by the resistor 12. The on / off control of the corresponding AC power supply can be performed (section 2).

When darkening again, the operation timing is delayed by the time t and the relay 8 is turned on. Relay 8
By having a time t on-delay timer function,
Even if there is a sudden change in illuminance during the time t, it can be invalidated, and the power supply operation is stabilized (section 3).

When the reset button 5 is released, the relay 8
The holding circuit 16 of the relay 8 by the make contact 83 and the reset button 5 is operated, and becomes bright, and the transistor 11
Even if is turned off, the on state of the relay 8 is maintained, so that the electromagnetic switch 9 also maintains the on state, and thereafter, the supply of AC power is stopped regardless of the change in illuminance (section 4). .

When the operation switch 4 is turned off, the electromagnetic switch 9 is turned off unconditionally, and the contacts 91 and 92 return.
The AC power is supplied to the outlet 6 irrespective of a change in illuminance, and can be used as a normal table tap (section 1).

[0019]

As described above, according to the present invention, the power tap control circuit in which the illuminance sensor and the relay are combined is built in the power strip, and the relay is automatically turned on and off according to the illuminance. The AC power supply is controlled, so even if you forget to switch off the electric appliances, the power supply will be automatically stopped when it gets dark, and wasteful power consumption and fire and other disasters will occur. Or cause it.

Further, since the user can freely set the sensitive illuminance by adjusting the adjustment volume, the usability is further improved, and if the reset button 5 is released, the AC power supply is not turned on again even when the brightness is increased. It can be used safely even when it continues.

Further, by operating the operation switch, it can be widely used as a normal table tap or an illuminance-sensitive table tap.

[Brief description of the drawings]

FIG. 1 is an external view of an illumination-sensitive table tap according to the present invention.

FIG. 2 is a power supply control circuit diagram with a built-in illuminance-sensitive table tap according to the present invention.

FIG. 3 is a timing chart showing an operation of the power supply control circuit.

[Explanation of symbols]

 Reference Signs List 1 illuminance-sensitive table tap 2 illuminance sensor 3 adjustment volume 4 operation switch 5 reset button 8 relay 15 power control circuit 16 relay holding circuit

Claims (2)

(57) [Scope of request for utility model registration] An illuminance sensor (2) for detecting light and darkness and an adjustment volume (3) for freely setting a sensitive illuminance of the illuminance sensor (2) in a table tap for supplying AC power to an appliance. ), And a relay (8) for supplying AC power,
A power supply control circuit (15) for automatically turning on and off the relay (8) according to the set sensitive illuminance is built-in. Illumination-sensitive table tap characterized by having a timer function. 2. An illuminance sensor (2) for detecting light and darkness and an adjustment volume (3) for freely setting a sensitive illuminance of the illuminance sensor (2) in a table tap for supplying AC power to an appliance. ), And a relay (8) for supplying AC power,
A power supply control circuit (15) for automatically turning on and off the relay (8) according to the set sensitive illuminance is built-in. It has a timer function and the relay (8)
An illuminance-sensitive table tap, comprising: a relay holding circuit (16) having a reset button (5) for preventing the relay (8) from turning on again even when turned off and turned bright.