JP4437241B2 - Signal light - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, as can be a night rescue signal when distress escape ships and aircraft, for position indication attached to the life jacket life vests lamp and relates to a signal lamp marker lamp or the like attached to the life raft, in particular to the flashing bulb inrush current control in about.
[0002]
[Prior art and problems to be solved by the invention]
The international treaty amended the test requirements for life jacket lights and lantern lights, etc., and this revision required life intensity lights in all directions of the upper hemisphere to be collected by lenses as in the past. Technology such as using light cannot be used, and it has become necessary to increase the battery capacity.
[0003]
On the other hand, in the light bulb blinking control circuit used in this type of conventional signal lamp, when the bulb is blinked, tungsten, which is the material of the bulb filament, has almost no resistance at room temperature. The inrush current flowed 5 to 8 times the rated current (see FIG. 10), placing a heavy burden on the battery and the light bulb, significantly reducing the capacity of the battery and the life of the light bulb.
[0004]
For this reason, as long as a conventionally used flashing control circuit for a light bulb is used, a battery having a capacity larger than necessary must be adopted. However, considering the fact that the battery occupies most of the size of the product, if a battery with a large capacity is adopted, the signal light as the product becomes large and heavy, and it can not be overlooked as something attached to the life jacket. There was a problem of having it.
[0005]
In other words, life jacket lights and life lamps that are mounted on ships and aircraft must be small and light, and their components should be kept to a minimum size and weight. Then, it is in a situation where it must be against this proposition.
[0006]
Further, since ships and airplanes travel in tropical and cold regions, conventional signal lights usually use expensive dry batteries that can be used even in extremely cold regions where the temperature is minus 30 ° C. Therefore, the cost of life jacket lamps and sign lamps is mostly occupied by expensive batteries. However, if the above-mentioned amendment is to be dealt with, the ratio of batteries to the cost of signal lights becomes even greater.
[0007]
Therefore, the present invention not only responds to the treaty amendment, but also is made as small and light as possible so that it can be used for life jacket lights and beacon lights. At the same time, it is not necessary to increase the capacity of the battery, and the cost is reduced. and an object of the present invention is to provide a signal lamp can realize the inrush current control to the flashing light bulb.
[0008]
[Means for Solving the Problems]
A signal lamp according to claim 1 of the present invention is a signal lamp such as a life jacket lamp for position display attached to a life jacket or a sign lamp attached to a life preserver in order to achieve the above-mentioned object ,
Comprising a Ru bulb that is flashing,
A signal lamp comprising a suppressing circuit excessive inrush current to the bulb by controlling the current flowing through the light bulb,
It consists of a main body case, a globe, a switch cover, and a marking on the main body case.
In the main body case, a plurality of batteries connected in series, a flashing circuit board, and a heat insulating material attached so as to surround the outer periphery of the battery,
The light bulb is attached to the main body case with a socket cover,
The glove houses the socket cover and the bulb,
The switch cover is attached to the outer surface of the end of the main body case opposite to the side on which the light bulb or the globe is attached, and can be rotated around the axis of the main body case.
In the switch cover, a magnet for driving the switch of the flashing circuit board is provided,
The circuit for suppressing the inrush current constitutes a flashing control circuit for the light bulb provided on the flashing circuit board, and includes a transistor that directly drives the flashing of the light bulb.
By controlling the base current of the transistor, by using the transistor in saturation, characterized in Rukoto such as suppressing the inrush current to the bulb.
In order to achieve the above object, a signal lamp according to claim 2 of the present invention is the signal lamp according to claim 1, wherein the base current IB of the transistor, the current amplification factor hfe of the transistor, the rated current IL of the bulb, When the voltage (rated voltage of the bulb) Vcc, the saturation loss voltage of the transistor Vs,
[Equation 3]
IB = IL / hfe
[Expression 4]
R = (Vcc−Vs) / IB
= (Vcc-Vs) hfe / IL
As described above, the optimum value of the resistance value of the resistor for controlling the base current to the transistor is determined .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view (A) and a bottom view (B) of a life jacket light which is an embodiment of a signal light according to the present invention, and FIG. In the figure, 1 is a main body case, 2 is a globe, 3 is a switch cover, and 4 is a marking provided on the main body case 1.
[0010]
In the main body case 1, batteries 5 and 5 connected in series, a flashing circuit board 6, and a polyethylene foam material 7 as a heat insulating material surrounding the outer periphery of the battery 5 are mounted. The globe 2 houses a light bulb 9 attached to the main body case 1 with a socket cover 8. Further, the switch circuit 3 has a switch in the switch cover 3 which is attached to the outer surface of the end of the main body case 1 opposite to the side to which the light bulb 9 or the globe 2 is attached so as to be rotatable around the axis of the main body case 1. A magnet 10 for driving (not shown) is provided.
[0011]
The shape of the globe 2 that covers the outer periphery of the light bulb 9 covers the substantially right cylindrical portion 12 that covers the outer periphery of the filament 11 that is the light source of the light bulb 9, and covers the top side of the light bulb 9 continuously to the upper portion of the substantially straight cylindrical portion 12. It consists of a substantially hemispherical part 13. The filament 11 is positioned in the substantially right cylindrical portion 12 and the dimensions of the substantially right cylindrical portion 12 are set so as not to be positioned in the substantially hemispherical portion 13. In the figure, reference numeral 12 a denotes a fitting portion of the substantially cylindrical portion 12 to the main body case 1.
[0012]
The globe 2 is formed of a transparent or semi-transparent plastic material, and transmits the light emitted from the filament 11 to the outside while irregularly reflecting the light. However, the diffuse reflectance of the substantially straight cylindrical portion 12 and the substantially hemispherical portion 13 is Instead of being uniform as a whole, it is set to be partially different so as to be substantially uniform in the range of the hemisphere from which light is emitted from the filament 11 (the upper hemisphere in a normal use state).
[0013]
FIG. 3 shows the light distribution comparison measurement result of the globe 2, and without the globe, the light intensity falls along the arrangement direction of the filament 11 (line XX) as shown in the figure (in the line connected with □ in the figure). When the glove according to one embodiment of the present invention is worn, the decrease in luminous intensity is suppressed (indicated by ◇, Δ, ★ in the figure).
[0014]
Further, a reflecting plate 14 for reflecting light emitted from the filament 11 to the outside of the globe 2 is provided at the upper end portion of the socket cover 8 located at the base of the substantially cylindrical portion 12 of the globe 2. The inclination θ of the reflecting plate 14 is 45 to 60 degrees with respect to the radial direction of the substantially cylindrical portion 12 as shown in FIG.
[0015]
FIG. 5 is a side sectional view (A) and a plan view (B) of the main body case 1. A guide protrusion 15 for incorporating the flashing circuit board 6 is provided on the inner wall surface of the main body case 1. Although not shown, a recess that can be loosely fitted with the guide protrusion on the outer peripheral edge of the flashing circuit board 6. Is provided. When the flashing circuit board 6 is mounted in the main body case 1, the batteries 5 and 5 and the flashing circuit board 6 are inserted together. This insertion operation is performed outside the guide protrusion 15 and the flashing circuit board 6. This can be easily done by fitting with the peripheral recess.
[0016]
As already described, the polyethylene foam 7 as a heat insulating material is attached to the outer periphery of the battery 5, but the polyethylene foam 7 is not provided in the main body case 1 in advance, but is wound around the outer periphery of the batteries 5 and 5. In the main body case 1 together with the flashing circuit board 6. The heat insulating material is not limited to the polyethylene foam material, but various materials can be used. By adopting such a heat insulating material, not only the battery life can be extended, but also the inner peripheral wall of the main body case 1 and the battery 5. The battery 5 can be positioned by filling a gap with the outer peripheral surface of the battery. Although illustration is omitted, the socket cover 8 provided with the contact terminals and the flashing circuit board 6 are connected by two electric wires. For this reason, when the batteries 5 and 5 wound with the polyethylene foam material 7 are accommodated in the main body case 1, the two electric wires are arranged outside the polyethylene foam material 7 on the inner peripheral wall of the main body case 1 and the outer periphery of the polyethylene foam material 7. Place it in the gap between the surfaces.
[0017]
The flashing circuit board 6 is provided with a switch that can be driven to contact and separate by the magnet 10 in the switch cover 3 as described above. This switch has a contact that is energized so as to be always off, and the switch cover 3 is rotated. Then, by placing the magnet 10 at the position of the switch, the contact of the switch is attracted by the magnetic force and turned on.
[0018]
FIG. 6 shows a configuration of a blinking control circuit for the light bulb 9 provided on the blinking circuit board 6 in order to carry out the inrush current control method for the blinking light bulb according to the present invention. Although this circuit is general in configuration, the transistor Tr4 is used in a saturated state by controlling the base current of the transistor Tr4 that directly drives the flashing of the light bulb 9, and the internal loss of the transistor Tr4 is controlled. In addition, the transient response when the transistor Tr4 is turned on is controlled by controlling the base current, so that the inrush current to the light bulb 9 can be suppressed.
[0019]
Specifically, as shown in FIG. 7, in order to control the current IL flowing through the light bulb 9 and suppress an excessive inrush current to the light bulb 9, the optimum value of the resistance value R of the resistor R7 is determined as follows. To do. That is, the rated current IL of the light bulb 9 is between the base current IB of the transistor Tr4 that directly drives the flashing of the light bulb 9 and the current amplification factor hfe of the transistor Tr4.
IB = IL / hfe
The relationship between the base current IB of the transistor Tr4 and the resistance value R of the resistor R7 is the power supply voltage (rated voltage of the light bulb 9) Vcc and the saturation loss voltage Vs of the transistor Tr4.
[Formula 6]
R = (Vcc−Vs) / IB
Therefore, the resistance value R of the resistor R7 is
[Expression 7]
R = (Vcc−Vs) hfe / IL
Then, it can be set to the optimal value for suppressing the inrush current to the light bulb 9.
[0020]
FIG. 8 is a diagram showing the battery-side terminal voltage, the bulb-side terminal voltage, and the current consumption when the bulb 9 is blinked by the blinking control circuit configured as described above. As shown in the figure, the inrush current is greatly suppressed as compared with the conventional example shown in FIG.
[0021]
FIG. 9 shows the results of measurement and analysis of blinking light in the life jacket light of the above-described embodiment driven to blink by the blinking control circuit configured as described above. The flashing frequency is 50 to 70 times per minute as stipulated in the international treaty, and the effective luminous intensity of 0.75 candela is maintained.
[0022]
【The invention's effect】
Since the signal lamp according to the present invention is as described above, it is possible to reduce the burden on the battery and the light bulb by suppressing the inrush current to the flashing light bulb, thereby extending the capacity of the battery and the life of the light bulb. Therefore, the battery occupying the majority of the manufacturing cost can be minimized, and the entire product can be configured in a small size that can be easily handled, and can be supplied at a lower cost.
[Brief description of the drawings]
FIG. 1 is a side view (A) and a bottom view (B) of a life jacket light which is an embodiment of a signal light according to the present invention.
FIG. 2 is a side sectional view of the same.
FIG. 3 is a diagram showing a result of comparative light distribution measurement of various gloves that can be used in the life jacket light of FIGS. 1 and 2;
FIG. 4 is a cross-sectional view showing a configuration of the reflecting plate.
FIG. 5 is a side sectional view (A) and a plan view (B) of the main body case.
6 is a circuit diagram showing a configuration of a lighting control circuit for bulb provided in the flash circuit board to implement the inrush current control method of the flashing light bulbs used in the embodiment of the signal lamp in accordance with the present invention.
7 is a circuit diagram showing a current flowing through a light bulb in the circuit configuration of FIG. 6. FIG.
8 is a diagram showing a battery-side terminal voltage, a bulb-side terminal voltage, and current consumption when the bulb is blinked by the blinking control circuit of FIG. 6. FIG.
FIG. 9 is a diagram showing blinking light measurement and analysis results in the life jacket light of the embodiment of the present invention that is blinking driven by the blinking control circuit of FIG.
FIG. 10 is a diagram illustrating a terminal voltage and current consumption when a light bulb is blinked by blink control conventionally used in a life jacket light.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body case 2 Globe 3 Switch cover 4 Marking part 5 provided in the main body case 1 Battery 6 Flashing circuit board 7 Polyethylene foam material 8 Socket cover 9 Light bulb 10 Magnet 11 Filament 12 Substantially cylindrical part 13 Substantially hemispherical part 14 Reflector 15 Guide Projection Tr4 Transistor R7 that directly drives the bulb Resistor that controls base current

Claims (2)

Signal lamps such as life jacket lights for position display attached to life jackets and marker lights attached to lifejackets,
Comprising a Ru bulb that is flashing,
A signal lamp comprising a suppressing circuit excessive inrush current to the bulb by controlling the current flowing through the light bulb,
It consists of a main body case, a globe, a switch cover, and a marking on the main body case.
In the main body case, a plurality of batteries connected in series, a flashing circuit board, and a heat insulating material attached so as to surround the outer periphery of the battery,
The light bulb is attached to the main body case with a socket cover,
The glove houses the socket cover and the bulb,
The switch cover is attached to the outer surface of the end of the main body case opposite to the side on which the light bulb or the globe is attached, and can be rotated around the axis of the main body case.
In the switch cover, a magnet for driving the switch of the flashing circuit board is provided,
The circuit for suppressing the inrush current constitutes a flashing control circuit for the light bulb provided on the flashing circuit board, and includes a transistor that directly drives the flashing of the light bulb.
By controlling the base current of the transistor, a signal lamp, wherein Rukoto such as suppressing the inrush current to the bulb by using the transistor in saturation. 2. The signal lamp according to claim 1, wherein a base current IB of the transistor, a current amplification factor hfe of the transistor, a rated current IL of the bulb, a power supply voltage (rated voltage of the bulb) Vcc, and a saturation loss voltage of the transistor Vs. When
[Expression 1]
IB = IL / hfe
[Expression 2]
R = (Vcc−Vs) / IB
= (Vcc-Vs) hfe / IL
The signal lamp is characterized in that the optimum value of the resistance value of the resistor for controlling the base current to the transistor is determined.

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