JP2014084013A - Voltage drop detector for illumination and lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device of a simple constitution giving a warning when the voltage of a battery loaded on an automobile drops, at a low cost.SOLUTION: A lighting device 1 including an LED light 2 taking a battery as a power supply is provided with a voltage drop detecting circuit 3 for detecting the input voltage from the battery and lighting a warning LED 18 when the voltage drops below a predetermined reference voltage. The voltage drop detecting circuit 3 is stored in a circuit storing case 7 removably fitted to a housing 4 of the LED light 2. The housing 4 includes: a pair of opposite side walls 4b and a bottom wall 4a, the upper part thereof is closed by an irradiation plate 5, and both ends thereof are closed by a pair of stop frames 8, 8 engaged with both ends. The stop frame 8 includes an engagement piece 8a inserted in a longitudinal engagement groove 9a of the housing 4, and the circuit storing case 7 is provided with an engagement piece 11a corresponding thereto and an engagement recessed part 11b in which the engagement piece 8a is inserted and mounted between the housing 4 and one of the stop frames 8.

Description

  The present invention relates to an illuminating device that uses an in-vehicle battery as a power source to turn on an LED light that is used to illuminate the interior of a vehicle or a luggage compartment.

  Conventionally, a warning is automatically issued according to the degree of reduction in the remaining amount of charge in the battery due to the power consumption of the in-vehicle electric device, and the consumption of the in-vehicle electric device is determined according to the degree of reduction in the remaining amount of charge to the driver, etc. There is an in-vehicle power supply monitoring device that promotes power suppression (see Patent Document 1). The in-vehicle power supply monitoring device provided in the vehicle is a power supply voltage detecting means for detecting the power supply voltage of the in-vehicle battery, and which of a plurality of preset grades the value of the power supply voltage output from the reference voltage is reduced from the reference voltage. Grade judging means for judging, and warning notifying means for transmitting a warning message for urging control of power consumption of the in-vehicle electric device set in advance corresponding to the judgment result by the judging means.

JP 2003-246246 JP

The above-described conventional apparatus has a complicated configuration and cannot be provided at a low cost. When mounting, wiring and the like are relatively complicated, requiring specialized knowledge about wiring technology, and mounting is not easy.
Accordingly, the present invention proposes a lighting device that can be provided at low cost and can be easily attached with a simple configuration that issues a warning when the voltage of the battery drops.

The present invention is an illuminating device including an LED light 2 that uses a battery mounted on an automobile as a power source, and is electrically connected to the battery, detects an input voltage from the battery, and falls below a predetermined reference voltage. Sometimes, the LED light 2 is provided with a voltage drop detection circuit 3 for lighting the warning LED 18.
The voltage drop detection circuit 3 is housed in a circuit housing case 7 that is detachably attached to the LED light 2.
A circuit housing case 7 detachably attached to the housing 4 of the LED light 2 and a voltage drop detecting circuit 3 fixed in the circuit housing case 7 constitute an illumination voltage drop detecting device.
A housing 4 having a pair of opposed side walls 4b and a bottom wall 4a, an irradiation plate 5 for closing the upper portion of the housing 4, and a pair of retaining frames for closing both ends of the housing 4 by engaging both ends of the housing 4 8 and 8, and is inserted into the engaging groove 9 a of the housing 4 with respect to the LED light 2 including the engaging piece 8 a inserted into the engaging groove 9 a in the longitudinal direction of the housing 4 in the retaining frame 8. The voltage drop is performed so that the circuit housing case 7 having the engaging piece 11a and the engaging recess 11b into which the engaging piece 8a of the retaining frame 8 is inserted is attached between the housing 4 and one retaining frame 8. Configure the detector.
The voltage drop detection circuit 3 is provided with a blocking circuit 23 that blocks the LED light 2 from the battery.
The warning LED 18 blinks in common with the LED 6 of the LED light 2.
The warning LED 18 lights a part of the LED 6 of the LED light 2.

  According to the present invention, when the voltage of the battery is lowered, the illumination itself is turned on or blinking, so that the state can be recognized externally and a prompt action can be taken. Since the voltage drop detection circuit is simply configured and incorporated in the LED light, it can be provided at a low cost, and a warning display function can be added to the vehicle simply by attaching the LED light, and battery consumption can be confirmed in advance. The resulting failure can be avoided.

It is a top view of the illuminating device which concerns on embodiment of this invention. It is a front view of the illuminating device of FIG. It is a side view of the illuminating device of FIG. It is a disassembled perspective view of the illuminating device of FIG. It is a circuit diagram of a voltage drop warning circuit. It is a circuit diagram of the voltage drop warning circuit which concerns on other embodiment.

An embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, the lighting device 1 is electrically connected to a battery mounted on a truck (not shown), and is attached to a wall surface of a cargo room as a lighting light for the cargo room. is there. The lighting device 1 is configured by attaching a voltage drop warning circuit 3 to an LED light 2.

  The LED light 2 includes a housing 4 having a rectangular inner space in which a side wall 4b rises from both side edges of a rectangular bottom wall 4a and the bottom and sides are closed, and a rectangular translucent plate that closes the top of the housing 4 5, a plurality of LEDs 6 fixed on the bottom wall 4 a of the housing 4 side by side at substantially equal intervals, a circuit housing case 7 coupled to one end of the housing 4, the other end of the housing 4, It is comprised with the stop frame 8 couple | bonded with the circuit storage case 6. FIG.

  Mounting flanges 9 extending horizontally are integrally formed on both side walls 4b of the housing 4. Both ends of the mounting flange 9 are provided with screw holes 9b through which screws for mounting the LED light 2 are inserted. On the lower end surface of the mounting flange 9, a rectangular groove 9a in the longitudinal direction is provided.

The LED 6 is electrically connected to the battery by a cord 10.
Both side edges of the translucent plate 5 are inserted into slits positioned opposite to the upper ends of both side walls 4 b of the housing 4.

  In the circuit housing case 7, a lid plate 12 bent in a U shape is coupled to an upper portion of a rectangular bottom plate 11 so as to close a side portion and an upper portion. On both sides of one end portion of the bottom plate 11, there are provided engagement pieces 11 a that protrude toward the housing 4 and are inserted into the rectangular grooves 9 a of the mounting flange 9, and engagement recesses 11 b that cut into the housing 4 side on both sides of the other end portion. . On both sides of the cover plate 12, a horizontally extending fixing flange 12 a that overlaps the cover plate 12 is continuous. On the fixing flange 12a, the presser plate 13 is fixed by a screw 14 in a state of protruding to the housing 4 side so as to face the engaging piece 12b in the vertical direction. The presser plate 13 has two insertion holes 13 a through which the screws 14 pass. The screw 14 passes through the presser plate 13 and the mounting flange 9 and is screwed to the bottom plate 11. One screw 14 passes through the mounting flange 9 of the housing 4 and is screwed into an engagement piece 12b inserted into the rectangular groove 9a.

  The retaining frame 8 is made of a plate material that substantially corresponds to the contour of the end face of the housing 4, and is joined to these end faces so as to close one end of the housing 4 and one end of the circuit housing case 7. One end of the retaining frame 8 is provided with an engaging convex portion 8 a that is inserted into the rectangular groove 9 a of the mounting flange 9 of the housing 4 or the engaging concave portion 11 b of the circuit housing case 7. The retaining frame 8 includes an insertion hole 8 b for a fixing screw 8 c that passes through the circuit housing case 7 and is screwed into the side wall 4 b of the housing 4.

  The voltage drop warning circuit 3 is fixed on the bottom plate 11 of the circuit housing case 7 as shown in FIGS. The voltage drop warning circuit 3 is electrically connected to the cord 10 and connected to the battery in parallel with the LED 6 as shown in FIG. The voltage drop warning circuit 3 blinks the warning LED 18 through the transmission circuit 17 by the output voltage of the comparator 15 when the input voltage Vin from the battery, which is normally 24 V, becomes smaller than the reference voltage Vre of the reference voltage source 16 by the comparator 15. The resistors 19 and 20 adjust the power supply voltage so that the voltage set as the blinking start voltage of the warning LED 16 becomes equal to the reference voltage. The warning LED 16 may be provided independently in the LED light 2 or in the circuit housing case 7, or one of the LEDs 6 of the LED light 2 may be shared.

  In this illuminating device 1, it attaches to predetermined places, such as a luggage compartment of a truck, and is electrically connected to a vehicle-mounted battery with a cord 10, and is used for illumination of a cargo compartment. The voltage drop warning circuit 3 compares the divided voltage of the input voltage from the battery with the reference voltage, and when the input voltage drops below the reference voltage, the transmitter circuit 17 intermittently outputs the output voltage of the comparator 15. Then, the warning LED 18 is blinked. The blinking of the warning LED 18 can confirm battery consumption and can quickly deal with it. The lighting device 1 is attached in the same manner as a normal lighting fixture, and can add a function of warning a voltage drop state without requiring additional wiring work or securing an installation space. It can be retrofitted by replacing it with lighting.

  Another embodiment is described with reference to FIG. In the figure, the voltage drop warning circuit 3 of this embodiment is configured by connecting a comparator 22 and a power cutoff circuit 23 in parallel via a resistor 21 in addition to the above configuration. The voltage drop warning circuit 3 compares the divided voltage of the input voltage Vin from the battery with the reference voltage Vre. When the input voltage drops below the reference voltage, the warning LED 11 blinks in the same manner as before. Further, the power cutoff circuit 23 is operated by the output of the comparator 22 to cut off the input voltage from the battery, and the LED light 2 is turned off.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 LED light 3 Voltage drop warning circuit 4 Housing 4a Bottom wall 4b Side wall 5 Translucent plate 6 LED
7 Circuit housing case 8 Retaining frame 8a Engaging projection 8b Insertion hole 8c Fixing screw 9 Mounting flange 9a Rectangular groove 10 Cord 11 Bottom plate 11a Engaging piece 11b Engaging recess 12 Lid plate 12a Fixing flange 13 Press plate 14 Screw 15 Comparator 17 Transmitter circuit 18 Warning LED
19 resistor 20 resistor 21 resistor 22 comparator 23 power supply cutoff circuit

Claims (7)

A lighting device equipped with an LED light that uses a battery mounted in an automobile as a power source,
The LED light includes a voltage drop detection circuit that detects an input voltage from a battery and turns on a warning LED when the voltage drops below a predetermined reference voltage.   The lighting device according to claim 2, wherein the voltage drop detection circuit is housed in a circuit housing case that is detachably attached to the LED light. A voltage drop detection device for illumination that is attached to an illumination device having an LED light that uses a battery mounted on an automobile as a power source and covers an LED fixed to the housing with an irradiation plate,
A circuit housing case detachably attached to the housing of the LED light;
A voltage drop detection circuit, which is fixed in the circuit housing case, includes a voltage drop detection circuit that detects an input voltage from a battery and turns on a warning LED when the voltage drops below a predetermined reference voltage. A drop detection device. The LED light includes a housing having a bottom wall and a pair of opposing side walls rising from the bottom wall, the irradiation plate for closing the upper portion of the housing, and both ends of the housing by engaging with both ends of the housing. A pair of retaining frames that close, the retaining frame comprising an engagement piece that is inserted into an engagement groove in the longitudinal direction of the housing,
The circuit housing case includes an engagement piece inserted into an engagement groove of the housing and an engagement recess into which the engagement piece of the stop frame is inserted, and the circuit storage case is interposed between the housing and one of the stop frames. The illumination voltage drop detection device according to claim 3, wherein the illumination voltage drop detection device is attached.   5. The lighting device or the lighting voltage drop detection device according to claim 1, wherein the voltage drop detection circuit includes a cutoff circuit that shuts off the LED light from the battery.   6. The lighting device or the voltage drop detection device for lighting according to claim 1, wherein the warning LED blinks the LED of the LED light.   6. The illumination device or the voltage drop detection device for illumination according to claim 1, wherein the warning LED lights a part of the LED of the LED light.

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