JPS6318159Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in a safety light that is connected to a wall outlet and automatically turns on when the power goes out.

This type of safety light has existed in the past as shown in Figure 2, but electromagnetic relay R _y is used as a means of detecting a power outage.
However, there was a limit to miniaturization, and using a transformer or electromagnetic relay would increase the weight, making the plug blade 1,
1' could not be held in place by simply plugging it into a wall outlet, and since it used contacts, it lacked reliability.

Embodiments of the present application will be described in detail below.

Reference numeral A denotes a power supply connection part, in which plug blades 1 and 1' are embedded and fixed in a molded part 1c equipped with support shafts 1b and 1b, with one end 1a and 1a' protruding, as shown in Fig. 6. . This power supply connection part A and leaf springs 3, 3' and 3'' whose ends are fixed to the printed board 2 constitute a power supply connection means B.The leaf springs 3 and 3' have their ends connected to the line β of the printed board 2, β', and the other ends 3a and 3a' are positioned so as to overlap in the vertical direction, and the other end 1 of the plug blade 1'
It corresponds to a′. Similarly, one end 1 of the plug blade 1
A leaf spring 3″ whose one end is connected to the line α corresponding to a
is provided. Ba is battery,
It is charged by a commercial power source via a rectifying element D and a resistor _R2 . The emitter of the transistor Tr was connected to the positive electrode of the battery Ba, the collector was connected to the line β' via the lamp La, and the base was connected between the connection point P between the rectifying element D and the resistor R ₂ and the line β'. Connect to the connection point Q of the series circuit of resistors R ₃ and R ₄ .
The resistors R ₂ , R 3 , and R ₄ are selected so that the potential at point Q is higher than the emitter potential of transistor Tr during charging, and lower than the emitter potential of transistor _Tr during power outage. do. Ne is a neon lamp and resistance R ₁
The lines α and β are connected through a series circuit of the switch S ₁ and the switch S ₁ , and the lines β and β′ are also connected by a switch S ₂ which operates in conjunction with the switch S 1. Furthermore, the switch
As shown in FIG. 7, S ₁ and S ₂ are provided with leaf springs 4, 4', 4'' having one end soldered to the printed board 2, and the tip portions 4a, 4a of the leaf springs 4, 4', 4''. ′,4a″ to 4a
4a' and 4a'' are arranged in parallel to each other, and the protrusion 5b at the tip of the leg 5a of the slide button 5 is projected into the recess 6 provided at the tip 4a of the leaf spring 4.

When the plug blades 1, 1' fixed to the power supply connection part A are rotated and protruded from the case, the plug blades 1, 1'
One end 1a, 1a' is the tip 3 of the leaf spring 3, 3', 3''
a, 3a', 3a'' and push up the tips 3a, 3a of the leaf springs.
3a' and the other end 1a' of the plug blade 1' are brought into contact, and the plug blade 1
The other end 1a is brought into contact with the tip 3a'' of the leaf spring 3'', the plug blade 1 and the line α are brought into contact with the plug blade 1' and the lines β, β', and the plug blades 1, 1' are connected to the outlet. When plugged in, voltage is supplied to the circuit and the storage battery Ba is charged.

However, the base voltage Vb of the transistor Tr
(The potential at point Q) is set to be equal to or slightly higher than the voltage of battery Ba, so when the power supply voltage is connected to the blades 1 and 1', the storage battery Ba is charged. , the transistor Tr is in a non-conducting state and the lamp La is in a non-conducting state. Move switches S ₁ and S ₂ and slide button 5, and press foot 5.
When the tip 5b of the leaf spring 4 is released from the recess 6 provided in the tip 4a of the leaf spring 4, the leaf spring 4 is pushed up and the leaf spring 4 is
and the tips 4a', 4a'' of the leaf springs 4', 4'' are brought into contact, and the neon lamp Ne is lit.

Next, when the power goes out, the storage battery Ba is no longer charged and discharged. When switch S ₂ is closed, a discharge current i ₀ flows, and the voltage between the emitter and base of the transistor Tr becomes V _Ba (R ₂ + R ₃ ) i ₀ , and the voltage applied to the emitter is applied to the base. Since it is higher than the voltage, base current flows and becomes conductive. Therefore, the lamp La turns on.
Also, when you remove the plug blades 1 and 1' from the outlet,
The situation is similar to that of a power outage, and the lamp La turns on, allowing it to double as a light during a power outage. In this way, when the lamp is unplugged from the outlet, the lamp La immediately lights up and can be used as a flashlight, and in normal use, the lamp La can be turned off by being plugged back into the outlet.
On the other hand, if you want to make the flashlight blink like a normal flashlight without plugging it into the outlet or unplugging it, you can store the blades 1 and 1' in the case, and the end of the blade 1'
The pressing force applied to the leaf spring 3 by a' is released, and as a result, the leaf spring 3 separates from the leaf spring 3'.
In other words, the electrical connection between the leaf springs 3 and 3' is released, and in this state, the lines β and β' are opened and closed as the switch _S2 is opened and closed. As a result, the lamp La can be made to blink as the switch _S2 is opened and closed, and the blinking can be performed by the switch _S2 in the same way as a normal flashlight.

As described above, the present invention includes a power connection part that holds a pair of plug blades together and is arranged to be freely tiltable between a position where the plug blades protrude from the case and a position where the plug blades are housed in the case; At a position where the blade protrudes from the case, the first line is electrically connected to one of the blades, the second line and the third line are simultaneously electrically connected to the other blade, and the blade is placed inside the case. power supply connecting means for disconnecting the electrical connection between the second line and the third line at a position where the first line and the second line are housed;
A charging circuit, which is a series circuit of a rectifying element, a first resistor, and a storage battery, inserted between the storage battery and the first line, and the first resistance is inserted between the storage battery and the first line;
A series circuit of a transistor and a lamp is inserted between the connection point of the storage battery and the first resistor and the third line, and a series circuit of the second resistor and the third resistor is inserted between the rectifying element and the first resistor. A lamp lighting circuit is inserted between the connection point of the resistor and the third line, and the connection point of both resistors is connected to the base of the transistor, and a switch that opens and closes between the second line and the third line. Because of this, power outage detection is performed using electronic components, making it possible to obtain a small and highly reliable safety light. As a result, it is lightweight and there is no risk of it falling off when plugged into a wall outlet. Furthermore, when the plug blade protrudes from the case, the second line and the third line are electrically connected regardless of the switch. The lamp lights up regardless of whether it is open or closed. In addition, if the plug blade is stored in the case, the connection status between the second line and the third line can be opened and closed via a switch, so when the plug blade is unplugged from the outlet and used as a flashlight, If you store it in the case, you can turn the lamp on and off like a normal flashlight by operating a switch.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a security light according to the present invention.
FIG. 2 shows an electric circuit diagram of a conventional example, and FIG. 3 shows an electric circuit diagram of an embodiment of the present invention. 4 and 5 are cross-sectional views showing the connection and disconnection states of the power supply connection means, and FIG. 4 shows the plug blades 1, 1' and the line α,
FIG. 5 shows the state in which β and β' are connected, and the state in which they are disconnected. FIG. 6 is a perspective view of the power supply connection part A. FIG. 7 is a perspective view of the switches _S1 and _S2 . FIG. 8 is a partial plan view showing the power supply connection means B. FIG. A...Power supply connection part, B...Power supply connection means, 1,
1'...Bung blade, _S1 , _S2 ...Switch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A power supply connection part that holds a pair of plug blades together and is arranged to be freely tiltable between a position where the plug blades protrude from the case and a position where the blades are stored in the case. Then, at a position where the blade protrudes from the case, the first line is electrically connected to one of the blades, the second line and the third line are simultaneously electrically connected to the other blade, and the blade is a power supply connection means for disconnecting the second line and the third line at a position where the line is housed in the case; and a rectifying element inserted between the first line and the second line. a charging circuit in which the first resistor is inserted between the storage battery and the first line; and a series circuit in which the transistor and the lamp are connected to the storage battery and the first resistor. A series circuit of a second resistor and a third resistor is inserted between the connection point of the rectifying element and the first resistor and the third line.
and a lamp lighting circuit inserted between the second line and the third line, the connection point of both resistors being connected to the base of the transistor, and a switch for opening/closing between the second line and the third line. A security light in which the resistor is set so that the transistor is in a non-conductive state when electricity is applied between the two plug blades, and the transistor is in a conducting state when electricity is not applied. (2) The power connection part consists of a pair of plug blades and a molded part that holds the plug blades together and is provided with a support shaft that protrudes in a direction perpendicular to the direction in which the blades protrude. The means includes one end of the plug blade protruding from the molded part to the side opposite to the outlet connection side, and three wires electrically connected to each of the above-mentioned lines.
The first plate spring connected to the first line is provided at a position corresponding to one end of one of the stopper blades, and the second plate spring connected to the second line is provided at a position corresponding to one end of one of the stopper blades. The spring and the third leaf spring connected to the third line are spaced apart from each other and are arranged in a position corresponding to the other stopper blade, and the power supply connection part rotates around the support shaft. At a position where the blade protrudes from the case, the one end of one blade is electrically connected to the first leaf spring, and the one end of the other blade is connected to the second leaf spring and the third leaf spring. The security light according to claim 1, wherein both leaf springs are brought into electrical contact by pressing either one of the leaf springs.