JP5422828B2 - Linear illumination lamp having light sources at both ends of a light guide - Google Patents

Description

  The present invention relates to a linear illuminating lamp having light sources at both ends of a light guide, and in particular, the present invention relates to each lighting fixture of a bimetallic glow discharge tube-lit straight tube fluorescent lamp or a loosely bent fluorescent lamp (hereinafter referred to in this application). The present invention relates to a linear illuminating lamp that can be mounted and used in a fluorescent lamp socket after the glow discharge tube is removed from the glow fluorescent lamp fixture.

  As a conventional linear light emitter having light sources at both ends of a light guide, for example, as described in Patent Documents 1 and 2 below, a strip-shaped light reflecting layer is provided along the longitudinal direction of a transparent elongated light guide. In addition, a linear light emitter is known in which light is incident on the light guide from its end face, and the incident light is reflected and scattered by the light reflecting layer to emit light from the circumferential surface of the light guide. .

  Since Patent Documents 1 and 2 are respectively related to a method of forming a linear light emitter itself and a means for preventing UV deterioration, the description of an important light source disposed on the end face of the light guide is as follows. (0003) only describes that a light source is arranged at one end of the linear light emitter, and in literature 2, only the description that the light source is arranged at the end of the columnar light guide is shown in paragraph (0016). .

  As described above, each of the above-mentioned documents has no description of the specific mounting means and current-carrying means of the light source with respect to the columnar light guide, and there is no suggestion thereof. It is surprising that there is no linear lighting that can be mounted on the fluorescent lamp socket of the appliance, and this kind of linear lighting is currently not present in the world despite strong customer demand. There is a fundamental and serious problem that there is.

JP 2000-338330 A JP 2003-141904 A

  The object of the present invention is to ingenuate the light source disposing means and the energizing means to both ends of the columnar light guide, and to create a light emitting diode (hereinafter referred to as LED) mounting structure as a light source. A linear illumination lamp having a light source at both ends of the body can be mounted and used in a fluorescent lamp socket of the currently used glow-type fluorescent lamp apparatus.

  The present invention includes a strip-shaped light reflecting layer along the length direction of the transparent columnar light guide, and light that enters the light guide from the LEDs disposed at both ends of the light guide in the light reflecting layer. In constructing a linear illumination lamp that reflects and scatters and emits light from the circumferential surface of the light guide, the LED energization terminal is connected to the low voltage output terminal of the power supply board, and the commercial AC input terminal is connected to each of the two. Two end caps are connected in parallel to a pair of current-carrying pins, which are connected in common to each pair, while the peripheral surfaces of both ends of the columnar light guide, the peripheral edge of the power supply board, and the peripheral edge of the heat sink are divided into two in the axial direction. The insulating cylinders are clamped and fixed by being sandwiched by the projecting piece grooves of the insulating cylinders so that the respective members are concealed and fixed by the bonded insulating cylinders, and the end caps are respectively installed in the outer openings of the insulating cylinders. The first characteristic of the present invention is that .

  However, the chip on which each LED is mounted is closely fixed to the chip substrate with a heat sink so that heat conduction is possible, and each LED is connected to the low voltage output terminal of the power supply board through the conductive pattern of each chip substrate. Good. The second feature of the present invention is that the LEDs are connected in series and connected to the low voltage output terminal of the power supply board, and the third feature of the present invention is the LED mounting chip. This is because a heat sink having a large number of heat radiating fins and oil-filled thin tubes is fixed to the heat radiating plate so as to be able to conduct heat.

  According to the first feature of the present invention, the glow discharge tube is removed from the fluorescent lamp fixture without modifying the currently used general glow-type fluorescent lamp fixture, and then the pair of two end caps is used. There is an excellent effect that a large amount of linear illumination lamps having light sources at both ends of a light guide that can be turned on immediately can be provided by simply attaching each current-carrying pin to the fluorescent lamp socket of the appliance.

  According to the second feature of the present invention, since the LEDs are connected in series and connected to the low voltage output terminal of the power supply board, the output voltage is doubled with respect to the parallel applied LEDs. In addition to being able to set, it is only necessary to supply a series of LEDs with half the current flowing through each of the LEDs in parallel. It can be set, and the wire diameter can be reduced by the half of the current, and the effect that the power supply board can be further reduced in size and weight can be added.

  According to the third feature of the present invention, since the heat sink is fixed to the heat radiating plate of the LED mounting substrate so as to be able to conduct heat, each LED can be radiated by air cooling with the heat sink. Even if the lighting current is set to the allowable maximum value, the essential LED does not overheat when it is turned on, and it is possible to provide a linear illumination lamp that can always be lit with a bright maximum light intensity at low cost.

Explanatory drawing which shows an example of this invention embodiment The disassembled perspective view which shows each part structure of this invention Enlarged plan view of LED mounting chip substrate used in the present invention FIG. 3 is a cut side view of the disconnection in FIG. Longitudinal elevation of the main part of the present invention Longitudinal plan view enlarging the main part of the present invention FIG. 2 is a perspective view after assembly of what is shown in FIG.

  As a mode for carrying out the present invention, a transparent acrylic resin column-shaped guide as shown in FIGS. 1 and 2 having a length close to that of a typical current 10 watt straight tube fluorescent lamp, for example, about 260 mm and a diameter of about 15 mm is used. The light body 1 is provided with a band-shaped light reflection layer 1A along the length direction thereof, and light incident on the light guide body 1 from each LED disposed at both ends of the light guide body 1 is reflected by the light reflection layer 1A. In constructing a linear illuminating lamp that scatters and emits light from the circumferential surface of the light guide 1, in the present invention, the LED mounting structure and the current-carrying structure on both sides of the columnar light guide are described in detail below. Ingenuity.

  The LED energizing terminal 2A in the mounting chip 2 in which each LED is fixed as shown in FIGS. 3 and 4 is a chip substrate made of a heat-resistant film having a circular shape of about 20 mm in diameter and a thickness of about 0.1 mm having a substantially U-shaped notch. 3 is connected and fixed to the conductive pattern 3A by cream soldering or the like, and a heat conductive metal heat radiation plate 4 of approximately the same shape as the chip substrate 3 and having a thickness of about 1 to 2 mm is adhered to the back surface of the chip substrate 3 A pair of energization terminals 3B, which are fixedly provided and provided in pairs on each conductive pattern 3A, are connected in series for each pair, and the power supply substrate 5 is provided by two covered electric wires D as shown in FIGS. The commercial AC input terminal 5B has two ends similar to the caps of a general straight tube fluorescent lamp prepared on both sides of the columnar light guide 1 via a coated electric wire D. Two in one with the cap 6 Commonly connected to each pair of the conduction pin 6A of each.

  However, the LED mounting chip 2 and the chip substrate 3 may be omitted, and the current-carrying terminals of the respective LEDs may be connected in series or in parallel by the covered electric wire D and directly connected to the low voltage output terminal of the power supply board. The projecting structure of the energizing pin 6A with respect to the insulating bush 6B of the cap 6 and the material, shape, and dimensions of each member are the caps (end caps), insulating bushing, energizing provided at both ends of the various types of straight tube fluorescent lamps. Configure in the same way as pins.

  Next, two covered electric wires D for electrically connecting the LEDs to each other in series or in parallel, and one of the AC input ends 5B of the power supply substrate 5 to the two energizing pins 6A of the other end cap 6 A total of three covered electric wires D of one covered electric wire D to be connected pass through the wiring pipe 7 as shown in FIGS. 1 and 5, and the pipe 7 is a strip-like light reflecting layer 1 </ b> A of the light guide 1. As shown in FIG. 1, the heat radiating plate 4 is provided with a heat sink 4A having a large number of elongated heat radiating fins f as shown in FIG. .

  After that, the peripheral surface near each end of the columnar light guide 1 and the wiring pipe 7 in FIG. 2, the periphery of the heat sink 4 and the periphery of the power supply substrate 5 are about 30 mm in diameter and 45 mm in length as shown in FIG. These plastic cylinders are arranged between the insulating cylinders 8 and 8 which are divided into two in the axial direction, and the peripheral surfaces or peripheral edges of the respective members are respectively inserted into the insulating cylinder opposing protruding piece grooves 9.

  In this state, when the insulating cylinders 8 and 8 are joined as shown in FIGS. 5 and 6, a known hook-shaped bullet piece formed integrally with a required part of the insulating cylinder 8 is engaged with a locking groove (not shown). 1), the insulating cylinders 8 and 8 are fixedly attached by one-time engagement with the bachin, and other appropriate fixing means such as screwing, bonding or fastening bands are used as shown in the above figures and FIG. By fixing together, the above members can be concealed and fixed in a state of being fixedly held by the opposed projecting groove 9 of the fixed insulating cylinder 8 as shown in the respective drawings. Forcibly fitting the wired end cap 6 to the outer opening as shown in each of the above figures, covering and fixing after covering, or inserting and fixing the end cap 6 in the opening, and fixing, The linear illumination lamp which has a light source at the both ends of the light guide by this invention was able to be comprised.

  However, the power supply substrate 5 may be an existing general high-frequency oscillation type small inverter power supply circuit that can convert commercial alternating current into low voltage direct current (or alternating current) suitable for the applied voltage of the LED. ~ 100KHz high-frequency oscillator and high-frequency transformer, the current general small inverter power circuit consisting of a rectifying element connected to the secondary side, or a small and lightweight single-winding transformer directly connected to the commercial AC power source, A well-known small low-voltage DC power supply circuit or the like composed of a rectifying element connected to the low voltage side is used.

  Since the linear illuminating lamp having the light sources at both ends of the light guide according to the present invention has the above-described configuration, in order to use it, for example, glow lighting for a 10-watt straight tube fluorescent lamp as shown in FIG. First, the glow discharge tube G is removed from the fluorescent lamp fixture as shown in FIG. 1, and then each of the current-carrying pins 6A projecting from the two end caps 6 in the same manner as the cap pins of the current general fluorescent lamp are shown. As shown in FIG. 1, it is mounted on the fluorescent lamp socket S / S in the fluorescent lamp fixture.

  Next, when the power plug P in FIG. 1 is inserted into a commercial AC power socket (not shown) such as AC 100 volts, a commercial voltage of about 85 volts is obtained by subtracting about 15 volts due to the choke coil CH (stabilizer) current. An AC voltage is applied to the commercial AC input end 5B of the power supply board 5 from each of the energizing pins 6A through the covered electric wire D, and a predetermined DC low voltage of about 3.4 to 4.0 volts generated at the low voltage output end 5A is generated. The light is applied to each LED in series arranged at both ends of the light guide 1 through the covered wire D directly or through the conductive pattern 3A of the chip substrate 3.

  As a result, a rated current of about 320 to 400 mA flows through each of the LEDs in series, and each of these LEDs is lit with a power consumption (light quantity) of about 1 to 1.5 watts and a total of about 2 to 3 watts. Then, light rays that have passed through the LED lens L enter the light guide 1 from both ends thereof, and the incident light is reflected and scattered by the light reflection layer 1A, and the light guide 1 on the opposite side of the light reflection layer 1A Since light can be emitted mainly within an irradiation range of about 45 ° on both sides of the light reflection layer 1A from the circumferential surface in the length direction, the right angle opposing surface separated by, for example, 50 cm from the columnar light guide 1 is illuminated within this range. It was able to illuminate at about 150 to 200 lux, and could be used as a linear illuminating lamp with a brightness comparable to that of a conventional 10 watt straight tube fluorescent lamp.

  In order to be able to insert and use a linear illumination lamp having light sources at both ends of a light guide according to the present invention in the 10-watt glow-type fluorescent lamp fixture, the columnar light guide 1 is shown in FIGS. A straight round bar product made of a colorless and transparent acrylic resin material with a diameter of about 15 mm is cut into the same length as the current general fluorescent lamp body length, and the light guide 1 is long on the peripheral surface. A strip-shaped light reflecting layer 1A is formed by a vapor deposition film or a metal foil having a width of about 10 mm along the vertical direction. In this formation, the strip-shaped light reflecting layer is directly formed on the peripheral surface of the light guide 1 itself. 1A is formed, or a belt-like plane 1B having a width of about 10 mm is provided on the peripheral surface of the light guide 1 along the length direction, and the light reflecting layer 1A is formed on the belt-like plane 1B.

  In addition to the 10 watt size fluorescent lamp as shown in each of the drawings, the columnar light guide 1 can be used by being inserted into various types of glow type fluorescent lamp fixtures conforming to the JIS standard of 15 to 40 watts. In order to achieve this, the length and diameter of the columnar light guide 1 and the width of the strip-shaped light reflecting layer 1A are set to the dimensions corresponding to the fluorescent lamps corresponding to the above-mentioned sizes, and the allowable power and light quantity are applied to the LED serving as the light source. This can be implemented by using a large LED or by increasing the number of LEDs used. However, even if commercial AC is directly applied between the energizing pins 6A of the two end caps 6, the LEDs are normally lit.

  Further, in disposing LEDs at both ends of the light guide 1, one or a plurality of recesses 1C into which the lens portions L of one or a plurality of LEDs provided on the LED chip substrate 3 are inserted are shown in FIGS. 6 is provided at both ends of the light guide 1, or the light of the LED put into the light body 1 through each of the recesses 1C is reflected and scattered by the light reflection layer 1A, so that the above-mentioned side on the opposite side of this layer 1A Light may be emitted from the peripheral surface of the light guide 1.

  Two covered electric wires D that electrically connect the LEDs to each other in series or in parallel, and one that connects one of the AC input ends 5B of the power supply substrate 5 to the two energization pins 6A of the other end cap 6. A total of three covered electric wires D are insulated along the light reflecting layer 1A of the fluorescent lamp 1 instead of being passed through the wiring pipe 7 as shown in FIG. 1 and FIG. The three covered wires D themselves or the insulating films with conductive patterns for the respective covered wires (not shown because they may be well-known products) are insulated along the light reflecting layer 1A and arranged in a good-looking manner. Also good.

  To enable a linear illumination lamp having a light source at both ends of a light guide according to the present invention to be inserted into a loosely bent fluorescent lamp illuminator other than a circuit line, or a current general slim size glow-type fluorescent lamp apparatus The dimensions of the respective parts such as the columnar light guide 1 and the power supply substrate 5 may be set to dimensions corresponding to a curved fluorescent lamp or a slim fluorescent lamp used in the above-mentioned instrument.

DESCRIPTION OF SYMBOLS 1 ... Columnar light guide 5 ... Power supply board 1A ... Light reflection layer 5A ... Low voltage output end 1B ... Plane 5B ... Commercial AC input end 1C ... Recess 6 ... End cap 2 ... LED mounting chip 6A ... Current supply pin 2A: LED energizing terminal 7: Wiring pipe 3 ... LED chip substrate 8 ... Insulating cylinder 3A ... Conductive pattern 9 ... Projection groove 3B ... Energizing terminal D ... Covered wire 4 ... Heat sink S ... Fluorescent lamp socket 4A ... Heat sink f ... Elongated heat dissipation fin

Claims (4)

  A strip-shaped light reflecting layer is provided along the length direction of the transparent columnar light guide, and light that has entered the light guide from the LEDs arranged at both ends of the light guide is reflected and scattered by the light reflecting layer. In constructing a linear illuminating lamp that emits light from the circumferential surface in the length direction of the light guide, the LED is connected to the low voltage output end of the power supply board, and the commercial AC input ends are respectively connected to two end caps. A pair of parallel projecting energizing pins are connected in common to each pair, while the peripheral surfaces of both ends of the columnar light guide and the peripheral edge of the power supply substrate are sandwiched by projecting groove grooves of an insulating cylinder divided in two in the axial direction. Insulating and fixing the insulating cylinders to conceal and fix the members with the bonded insulating cylinders, and fix the end caps to the outer openings of the insulating cylinders. A linear illumination lamp with light sources at both ends of the body.   A strip-shaped light reflecting layer is provided along the length direction of the transparent columnar light guide, and light that has entered the light guide from the LEDs arranged at both ends of the light guide is reflected and scattered by the light reflecting layer. When configuring a linear illuminating lamp that emits light from the circumferential surface in the length direction of the light guide, the LED current-carrying terminal provided on the LED mounting chip is connected to the low-voltage output terminal of the power supply board through the conductive pattern of the chip board with a heat sink And the common AC input ends are connected in common to the current-carrying pins provided in parallel with each other by two pairs of two end caps, and the peripheral surfaces of both ends of the columnar light guide and the power supply board In addition, each of the members is concealed and fixed with the attached insulating cylinder by sandwiching and fixing each of the insulating cylinders by sandwiching the peripheral edge of the heat sink and the peripheral edge of the heat sink by the projecting groove of the insulating cylinder divided into two in the axial direction. , Each outside opening of each insulation tube Linear lamp having a light source at both ends of the light guide, characterized in that fixing the serial end cap.   3. The linear illuminating lamp having light sources at both ends of a light guide body according to claim 1 or 2, wherein the LEDs are connected in series and connected to a low voltage output end of a power supply board.   The linear shape which has a light source in the both ends of the light guide as described in any one of Claim 1- Claim 3 which fixed the heat sink to the heat sink of the said LED mounting chip so that heat conduction was possible. Lighting light.

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