JP2014164976A - Straight tube light emission diode type floodlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that it is hard to install a heat sink showing sufficient endotherm and heat radiation effect.SOLUTION: A straight tube LED floodlight X comprises a plurality of LEDs 1, a heat sink 3 made of material having thermal conductivity, a board 4 having a plurality of LEDs 1 arranged uniformly and a pair of plugs 6 for fixing and supporting the heat sink 3. In the case that the board 4 is a flexible circuit board, the board 4 is arranged while its entire surface is being closely adhered to the outer peripheral surface of the heat sink 3. The heat sink 3 has a recess 3A and the board 4 is bent at the recess 3A and arranged in such a way that the entire surface of a prescribed area 4B of the board 4 provided with a DC power source unit 2 is closely adhered to the inner peripheral surface of the heat sink 3. In the case that the board 4 is a copper board, the heat sink 3 may also act as the board 4. A plurality of LEDs 1 are directly arranged along the outer peripheral surface of the heat sink 3. In turn, the DC power source unit 2 is directly installed at the inner peripheral surface of the heat sink 3.

Description

  The present invention relates to a straight tube type light emitting diode type illumination lamp. In particular, the present invention relates to a straight tube type light emitting diode type illumination lamp capable of irradiating light in the entire circumferential direction around the central axis in the longitudinal direction of the illuminating lamp body.

  A light emitting diode type illumination lamp (LED illumination lamp) is a lighting fixture that uses a plurality of light emitting diodes as light sources. In recent years, the conversion from illumination lamps such as incandescent lamps, fluorescent lamps, and mercury lamps to LED illumination lamps is rapidly progressing. An LED illumination lamp has an excellent advantage that power consumption for obtaining a required light amount is lower than that of other illumination lamps. Further, the LED illumination lamp does not contain a designated harmful substance such as mercury, and the weight of the main body is relatively light, or has an advantage that the service life is long from a comprehensive viewpoint. Hereinafter, a semiconductor chip of a light emitting diode including electrodes is referred to as a light emitting diode element (LED).

  In existing lighting equipment, most of the general-purpose straight tube lighting is a fluorescent lamp. Therefore, the straight tube type LED lighting lamp has the same outer shape as the straight tube type fluorescent lamp and has the same standard base so that it can be directly attached to the fixture of the straight tube type fluorescent lamp and can be replaced with the straight tube type fluorescent lamp. ing. However, the fluorescent lamp power supply unit that supplies alternating current after firing can not be applied as a power supply unit for an LED illumination lamp that is lit with a direct current. In view of this, the straight tube LED lighting is provided with a dedicated DC power supply unit for supplying DC to the LED.

  The straight tube type LED lighting can be divided into an external power supply type and a built-in power supply type depending on the arrangement of the DC power supply unit. In particular, the built-in power supply type straight tube LED lighting lamp has a direct connection specification that supplies power directly from a commercial AC power source to a DC power supply unit, and a ballast specification that supplies power to a DC power supply unit through a ballast of an existing fluorescent lamp. are categorized. Each type of straight tube LED lighting has advantages and disadvantages. When replacing a fluorescent lamp with an LED lighting, a suitable type of straight tube LED lighting is selected and installed according to the circumstances. ing.

  By the way, in LED lighting, the light emitted from LED which is a light source has directivity. Therefore, the LED illumination lamp is suitable for illumination that irradiates light in a spot manner, but it can be said that it is not very suitable for illumination that uniformly illuminates the entire room. In particular, when a straight tube type LED illumination lamp is attached to an existing fixture instead of a straight tube fluorescent lamp, it is necessary to adjust the mounting angle of the straight tube LED illumination lamp in accordance with the type of the fixture.

  Therefore, in order to be able to illuminate the entire room evenly without adjusting the mounting angle without being bound by the type of existing fixtures, light is emitted 360 degrees around the central axis in the longitudinal direction of the illuminating lamp body. A straight tube type LED illuminating lamp that can irradiate is considered. Hereinafter, the central axis in the longitudinal direction of the straight tube LED illuminating lamp is simply referred to as the axis of the tube, and irradiating light in the entire circumferential direction around the axis of the tube is referred to as full-circumference irradiation.

  Patent Document 1 and Patent Document 2 disclose a straight tube type LED illuminating lamp that can irradiate the entire circumference by providing an LED of a light source on a substrate provided orthogonal to the axial direction of the tube. Patent Document 3 and Patent Document 4 disclose a straight-tube LED illuminating lamp that can irradiate the entire circumference by arranging a plurality of printed circuit boards back to back along a direction orthogonal to the axial direction of the tube. Yes. In Patent Document 5 and Patent Document 6, straight tubes that can irradiate the entire circumference by arranging LEDs on a pipe-shaped printed circuit board side by side or arranging LEDs on a spiral printed circuit board in the spiral direction. A shaped LED illuminating lamp is disclosed.

Utility Model Registration No. 3172981 (paragraph 0016) JP 2011-54421 A (paragraph 0029) JP 2011-43317 A (paragraph 0039) JP2012-9316 (paragraph 0034) JP 2004-335426 A (paragraph 0021) JP 2012-28232 A (paragraph 0054)

  In straight tube type LED lighting lamps currently on the market, generally a plurality of LEDs are mainly made of aluminum over the longitudinal direction on the back side of a printed circuit board (LED board) in which a plurality of LEDs are arranged facing downward. A heat sink is provided. In particular, in a power supply built-in straight tube type LED lighting lamp, a printed circuit board (power supply board) of a DC power supply unit is provided between an LED board and a heat sink. Therefore, the heat sink contacts the LED substrate and the power supply substrate on the lower surface, and contacts the air and the front surface on the upper surface, so that sufficient heat absorption and heat dissipation can be performed, and a required light quantity can be obtained stably without damage.

  However, when a plurality of LEDs are arranged so as to irradiate the entire circumference, it is difficult to provide a heat sink having a sufficient contact area with the LED substrate and air. For this reason, since it is necessary to reduce the amount of light emitted from the light source to suppress the amount of heat generated, the necessary brightness cannot be obtained, and sufficient performance and quality cannot be obtained. In particular, since there is no space for providing the power supply substrate, it is difficult to provide the DC power supply unit in the illuminating lamp body.

  In view of the above-mentioned problems, the present invention has as its main object to provide a straight tube LED illuminating lamp capable of improved all-round irradiation. It is another object of the present invention to provide a straight tube type LED illuminating lamp that is capable of irradiating around the entire circumference and provided with a heat sink that can absorb and absorb heat sufficiently. Some of the advantages achieved by the present invention are described in detail in specific embodiments.

  In order to solve the above problems, a straight tube type LED illumination lamp of the present invention has a plurality of LEDs (1), a cylindrical heat sink (3) made of a material having thermal conductivity, and a plurality of LEDs (1). The heat sink (3) is fixed at both ends of the flexible wiring board (4) provided in close contact with the outer peripheral surface and the heat sink (3). And a pair of plugs (6) to be supported.

  Desirably, the heat sink (3) has a notch (3A) along the axial direction of the tube, and supplies direct current to the plurality of light emitting diode elements (1) in a predetermined region (4B) of the flexible wiring board (4). The DC power supply unit (2) is disposed, and the DC power supply unit (2) is arranged along the inner peripheral surface of the heat sink (3) so that the flexible wiring board (4) is bent at the notch (3A). Further, the entire surface of the predetermined region (4B) is provided in close contact with the inner peripheral surface.

  Further, it includes a cylindrical transparent or translucent resin shade (5) that houses a heat sink (3) provided with a flexible wiring board (4) and has the same outer shape as a general-purpose straight tube fluorescent lamp. A pair of plugs (6) are provided with vent holes (6B).

  Another straight tube type light emitting diode type illumination lamp according to the present invention includes a plurality of LEDs (1) and a plurality of LEDs (1) arranged uniformly over the entire surface of one side of the copper substrate (4). A heat sink (3) formed by bending 4) into a cylindrical shape and a pair of plugs (6) for fixing and supporting the heat sink (3) at both ends of the heat sink (3) are provided.

  Desirably, a direct current power supply unit (2) for supplying direct current to the plurality of light emitting diode elements (1) is directly provided on the other surface of the copper substrate (4) on the inner peripheral surface of the heat sink (3). Further, it comprises a cylindrical transparent or translucent resin shade (5) that contains a heat sink (3) comprising a copper substrate (4) and has the same external shape as a general-purpose straight tube fluorescent lamp, The pair of plugs (6) are provided with vent holes (6B).

  In addition, the said code | symbol was attached | subjected for convenience of explanation, Comprising: This invention is made into the same structure as the straight tube | pipe type LED lighting lamp which can irradiate the perimeter of embodiment specifically shown by drawing. It is not limited.

  In the straight tube type LED illuminating lamp of the present invention, since the substrate on which the plurality of LEDs are disposed is provided on the outer peripheral surface of the cylindrical heat sink, the LEDs are disposed in the entire circumferential direction around the axis of the tube. In addition to sufficient heat absorption and heat dissipation. In particular, the DC power supply unit can be provided on the main body of the illuminating lamp by arranging the DC power supply unit on the flexible wiring board and closely contacting the DC power supply unit to the inner peripheral surface of the heat sink so as to be bent at the notch of the heat sink. Therefore, a power supply built-in straight tube type LED illuminating lamp capable of irradiating all around can be realized.

  In addition, the straight tube type LED illuminating lamp of the present invention is provided with a cylindrical heat sink including a substrate on which a plurality of LEDs are disposed, so that the LEDs are disposed in the entire circumferential direction around the axis of the tube. And can sufficiently absorb heat and dissipate heat. In particular, the direct current power supply unit can be installed in the main body of the illuminating lamp by directly arranging the direct current power supply unit on the inner peripheral surface of the heat sink. A light can be realized.

It is a perspective view which shows one Embodiment of the straight tube | pipe type LED lighting lamp of this invention. It is sectional drawing of one Embodiment shown by FIG. It is an expanded view of the flexible wiring board in the straight tube | pipe type LED lighting of this invention. It is a circuit diagram of the direct-current power supply unit in a power supply built-in type straight tube type LED lighting lamp. It is an expanded view of the copper substrate in the straight tube | pipe type LED lighting lamp of this invention.

  FIG. 1 and FIG. 2 show an embodiment of the straight tube type LED illumination lamp of the present invention. In the present invention, the ceiling direction is the upper side, and the floor surface direction is the lower side. FIG. 3 shows a flexible wiring board. However, FIG. 3 schematically shows an outline of the flexible wiring board, and does not accurately show the actual arrangement of a plurality of electronic components. FIG. 4 shows an example of a known DC power supply unit that can be provided in the main body of the straight tube type LED lighting of the present invention.

  The straight tube type LED illuminating lamp X includes a plurality of LEDs 1 that are light sources, a DC power supply unit 2 that supplies a DC current to the plurality of LEDs 1, a cylindrical heat sink 3, and a substrate on which the plurality of LEDs 1 are disposed. 4 and. In the straight tube LED illuminating lamp X of the embodiment shown in FIGS. 1 and 2, the substrate 4 is a flexible wiring substrate. Further, the straight tube type LED illumination lamp X includes a cylindrical shade 5 and a plug (base) 6 having the same standard as the straight tube type fluorescent lamp that supports the shade 5.

  The plurality of LEDs 1 are electrically connected in series in units of several to a dozen. A series unit composed of a plurality of LEDs 1 connected in series is connected in parallel. Therefore, when one of the LEDs 1 is damaged, even if the series unit including the damaged LED 1 is electrically disconnected, power is supplied to the other series units. be able to. The plurality of LEDs 1 are arranged as evenly as possible in the entire circumferential direction of the straight tube LED lighting lamp X.

  As shown in FIG. 4, the DC power supply unit 2 includes a DC power supply 10 including at least a plurality of silicon rectifiers, and a constant current circuit 20 that is a chopper circuit. The constant current circuit 20 includes a high-frequency pulse generator 20A and a series circuit 20B of a switching element TR and a detection resistor RS. The switching element TR is a field effect transistor (MOSFET). The high-frequency pulse generator 20A outputs a gate signal to the switching element TR to turn on and off at high speed, and maintains the direct current flowing through the plurality of LEDs 1 at a predetermined constant current value.

  The heat sink 3 is a cylindrical metal tube made of a material having thermal conductivity such as aluminum. The heat sink 3 has a notch 3A along the axial direction of the tube. The cutout 3A is basically provided on the upper side of the illuminating lamp main body, but the arrangement of the cutout 3A is arbitrary because it hardly affects the performance of illumination. For example, in FIG. 1, the notch 3 </ b> A is shown to be located on the lower side of the main body of the illuminating lamp. However, when the straight tube type LED illuminating lamp X is attached to a fixture provided on the ceiling, the notch 3 </ b> A You may attach so that it may be located in an upper side.

  A substrate 4 shown in FIG. 3 is a flexible wiring substrate formed of a resin film such as polyester. A plurality of LEDs 1 are equally arranged on the substrate 4. In particular, in the straight tube type LED lighting X of the embodiment, the DC power supply unit 2 is disposed. Therefore, the substrate 4 shares the LED substrate and the power supply substrate. The printed wiring surface of the substrate 4 is divided into a region 4A in which a plurality of LEDs are provided along a tube axial direction and a region 4B in which the DC power supply unit 2 is provided along a boundary line indicated by a dotted line in FIG.

  The entire surface of the substrate 4 is provided in close contact with the outer peripheral surface of the heat sink 3 so that the plurality of LEDs 1 are evenly disposed on the outer peripheral surface of the heat sink 3. The board | substrate 4 is affixed on the outer peripheral surface of the heat sink 3 with a heat conductive adhesive agent, for example. However, there may be a region where the LEDs 1 cannot be provided due to the design, and the fact that the plurality of LEDs 1 are evenly arranged means that all the LEDs 1 need to be distributed at exactly the same intervals. It does not mean that. In other words, the plurality of LEDs are evenly arranged to such an extent that a general person does not feel variation in the amount of light in the entire circumferential direction.

  In particular, in the straight tube type LED illuminating lamp X of the embodiment, the DC power supply unit 2 is disposed in the predetermined region 4B described above on the printed wiring surface of the substrate 4, and the substrate 4 is located at the notch 3 </ b> A of the heat sink 3. The predetermined region of the substrate 4 on which the DC power supply unit 2 is disposed on the inner peripheral surface of the heat sink 3 so that the DC power supply unit 2 is disposed along the inner peripheral surface of the heat sink 3 so as to be bent. The entire surface of 4B is provided in close contact.

  In the straight tube type LED illuminating lamp X of the embodiment configured as described above, it is possible to irradiate the entire circumference with a plurality of LEDs 1 arranged in close contact with the outer peripheral surface of the cylindrical heat sink 3. . Further, by accommodating the DC power supply unit 2 in the hollow portion 3B of the cylindrical heat sink 3, the DC power supply unit can be built in the illumination lamp body. And it can suppress that the circumference | surroundings of the heat-generation source containing several LED1 become high temperature exceeding an allowable range with the heat sink 3 which has sufficient area for heat absorption and heat dissipation. As a result, the possibility of damaging the LED 1 is reduced, and a required light amount can be obtained with less energy loss.

  The shade 5 is formed of a transparent or translucent resin such as polycarbonate. The shade 5 has the same outer shape as a general-purpose straight tube fluorescent lamp. The shade 5 has an inner diameter large enough to accommodate the heat sink 3 provided with the substrate 4 in a state in which the plurality of LEDs 1 are disposed. The heat sink 3 provided with the substrate 4 is inserted and accommodated in a cylinder of the shade 5.

  The plug 6 is formed according to the same standard as a general-purpose straight tube fluorescent lamp. The pair of plugs 6 are fixed to both ends of the shade 5 by fixing members such as screws (not shown). At the same time, the pair of plugs 6 fixes and supports the heat sink 3 at both ends of the heat sink 3. Specifically, the resin plug 6 is provided with a plurality of hook-shaped locking members such as hooks (not shown) by integral molding, and a plurality of locking holes 3 </ b> C formed in advance at both ends of the heat sink 3. The plugs 6 are engaged with the heat sinks so as to hook the locking members, respectively. Furthermore, the heat sink 3 can be more firmly fixed by a fixing member such as a screw.

  Each plug 6 has a pair of energizing pins 6A each having a standard size. Each energizing pin 6A is connected to the DC power supply unit 2 through an input / output coupler by a lead wire (not shown). Each plug 6 is provided with at least one vent hole 6B. The hollow space 3B of the heat sink 3 is in direct contact with air over the entire inner peripheral surface except for a predetermined region 4B of the substrate 4 on which the DC power supply unit 2 is provided. The hot air in the hollow space 3B flows by the outside air entering from the vent hole 6B and is exhausted to the outside through the vent hole 6B. Therefore, even when the heat sink 3 is covered with the shade 5 without a gap, heat absorption and heat dissipation are performed efficiently.

  In the straight tube type LED lighting lamp X of the embodiment, the shape of the shade 5 is the same as that of a general-purpose straight tube fluorescent lamp, and the plugs 6 at both ends have the same standards as the general-purpose straight tube fluorescent lamp. It is. Therefore, the straight tube type LED illumination lamp X of the embodiment does not have a possibility of being easily dropped by vibration, like the straight tube type fluorescent lamp. And it is not necessary to adjust an attachment angle, and can be easily attached to an existing fixture for a straight tube fluorescent lamp. In particular, in the case of a straight tube LED lighting with a built-in power source, no special installation work is required.

  FIG. 5 shows a copper substrate mainly made of a thin copper plate. However, FIG. 5 schematically shows the outline of the copper substrate, and does not accurately show the actual arrangement of a plurality of electrical components or electronic components. In the straight tube type LED lighting lamp X of the present invention, a copper substrate can be applied instead of the flexible wiring substrate. When the substrate 4 is a copper substrate, the substrate 4 also serves as the heat sink 3. The copper substrate has the advantage of higher heat absorption and heat dissipation efficiency. Moreover, since the operation | work which affixes the board | substrate 4 to the heat sink 3 becomes unnecessary, workability | operativity improves and it is advantageous at the point that production efficiency is high.

  Even when a copper substrate is used, the basic configuration is the same as that of the straight tube LED lighting lamp X using a flexible wiring board except that the heat sink 3 includes the substrate 4. In the substrate 4 mainly made of copper, as shown in FIG. 5, the plurality of LEDs 1 are arranged substantially evenly over the entire surface with one surface of the substrate 4 as the surface. Then, for example, the substrate 4 is bent into a cylindrical shape so that the surface of the substrate 4 becomes the outer peripheral surface of the heat sink 3 to form the heat sink 3. The pair of plugs 6 fixes and supports the heat sink 3 at both ends of the heat sink 3 that also serves as the substrate 4.

  When the DC power supply unit 2 that supplies a DC current to the plurality of LEDs 1 is built in the main body of the illuminating lamp, each electrical component of the DC power supply unit 2 is provided on the other surface corresponding to the back surface of the substrate 4 on the inner peripheral surface of the heat sink 3. Or an electronic component and wiring are provided directly. The shade 5 can accommodate the heat sink 3 including the substrate 4 on which the plurality of LEDs 1 are arranged. The shade 5 has the same outer shape as a general-purpose straight tube fluorescent lamp.

  The straight tube LED illuminating lamp of the embodiment described above does not have to be exactly the same as the specific configuration shown in the figure. Some examples of the straight tube type LED illuminating lamp of the embodiment have already been specifically shown. However, the straight tube type LED lighting lamp can be modified or applied without departing from the technical idea of the present invention. Moreover, the straight tube | pipe type LED illumination lamp of embodiment can be implemented combining the technique regarding a well-known straight tube | pipe type LED illumination lamp.

  The present invention can be widely used in the technical field of lighting equipment. The present invention facilitates the replacement of a straight tube type fluorescent lamp to a straight tube type LED lamp and facilitates the spread of the straight tube type LED lamp. The present invention contributes to the development of LED lighting that is expected to save energy.

X Straight tube light-emitting diode type lighting (straight tube LED lighting)
1 Light-emitting diode element (LED)
2 DC power supply unit 3 Heat sink 3A Notch 3B Hollow space 3C Engagement hole 4 Substrate 5 Shade 6 Plug (base)
6A Energizing pin 6B Ventilation hole 10 DC power supply 20 Constant current circuit

Claims (6)

A plurality of light emitting diode elements, a cylindrical heat sink made of a material having thermal conductivity, and the entire surface closely contacted with the outer peripheral surface so that the plurality of light emitting diode elements are evenly disposed on the outer peripheral surface of the heat sink. A straight tube type light-emitting diode type illumination lamp having a flexible wiring board provided on the both ends of the heat sink and a pair of plugs that fix and support the heat sink at both ends of the heat sink.   The heat sink has a notch along the axial direction of the tube, a direct current power supply unit that supplies direct current to the plurality of light emitting diode elements is disposed in a predetermined region of the flexible wiring board, and the flexible wiring board has the notch 2. The straight pipe according to claim 1, wherein the predetermined area is closely attached to the inner peripheral surface so that the DC power supply unit is disposed along the inner peripheral surface of the heat sink so that the DC power supply unit is bent at Light-emitting diode type lighting.   It includes a cylindrical transparent or translucent resin shade that houses the heat sink provided with the flexible wiring board and has the same outer shape as a general-purpose straight tube fluorescent lamp, and has a vent hole in the pair of plugs. The straight tube type light emitting diode type illumination lamp according to claim 1, wherein the straight type light emitting diode type illumination lamp is provided.   A plurality of light emitting diode elements, a heat sink formed by uniformly arranging the plurality of light emitting diode elements over the entire surface of one surface of the copper substrate, and bending the copper substrate into a cylindrical shape; A straight tube type light emitting diode type illumination lamp having a pair of plugs for fixing and supporting a heat sink.   5. The straight tube type light emitting diode type according to claim 4, wherein a direct current power supply unit for supplying direct current to the plurality of light emitting diode elements is directly provided on the other surface of the copper substrate on the inner peripheral surface of the heat sink. Lighting light. A cylindrical transparent or semi-transparent resin shade that contains the heat sink including the copper substrate and has the same external shape as a general-purpose straight tube fluorescent lamp is provided, and a vent hole is provided in the pair of plugs. The straight tube type light emitting diode type illumination lamp according to claim 4, wherein:

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