JP5877366B2 - LED unit - Google Patents

Description

  The present invention relates to an LED unit using an LED as a light source.

  2. Description of the Related Art In recent years, lighting fixtures including LED units using LEDs (light-emitting diodes) that are smaller in power consumption, smaller in size and longer in life than fluorescent lamps and the like are being used due to increasing environmental awareness.

  As this type of lighting fixture, for example, one having a long mounting base with a U-shaped cross section and a lid portion that is fitted to the upper portion of the mounting base and has a large number of LEDs disposed therein. Known (for example, Patent Document 1).

  The cover part in the lighting fixture of patent document 1 is fitted to a mounting base so that the opening part of the upper part of a mounting base may be covered, and is made from transparent insulating materials, such as an acrylic resin and glass. On the upper part inside the lid, LEDs attached to the substrate are arranged at predetermined intervals. The lighting fixture of Patent Document 1 can be used as a linear light source by an LED unit in which a plurality of LEDs are arranged at predetermined intervals.

JP 2005-19299 A

  By the way, the LED unit has a characteristic that the size can be set relatively freely according to the length of the substrate on which the LED is disposed, the number of the substrates, and the like. However, if the length of the substrate of the LED unit is long, it is difficult to align the substrate side and the lid side in the longitudinal direction, and the assembly of the LED unit may be complicated.

  This invention is made | formed in view of the said reason, The objective is to provide the LED unit which can make an assembly of an LED unit simpler.

The LED unit of the present invention includes an LED, a mounting board that is formed in a long plate shape and mounts the plurality of LEDs on one surface side in the longitudinal direction, and a bottom portion that faces the one surface of the mounting board And a side wall portion extending from the bottom portion to the mounting substrate side, and a long translucent cover portion having a C-shaped cross section covering the mounting substrate, wherein the mounting substrate is The other surface side of the mounting substrate is held by a heat dissipating member that is elongated along the longitudinal direction of the mounting substrate and dissipates heat from the mounting substrate, and the heat dissipating member is accommodated in the cover portion and is A main piece that contacts the other surface side of the mounting substrate, and a pair of side pieces extending in the thickness direction of the main piece from both ends of the main piece along the longitudinal direction, and each of the pair of side pieces the, along the longitudinal direction of the butt out the side piece to the outside of the side piece Includes a plurality of impact force portion provided Te, more the cover portion, in the side wall portion, it leaves for fitted independently in a plurality of upper Symbol protrusion is coupled and the cover portion and the heat radiating member a fitting recess, with respect to the heat radiating member, and determines the longitudinal position of the cover portion, the protruding portion and a derivative cormorant plurality of induction portion to the fitting recess, the guiding section Is characterized by a recess shape in which the recess gradually decreases toward the fitting recess .

In this LED unit, the cover part has a plurality of first protrusions along the short direction of the cover part in the longitudinal direction of the cover part on the inner surface side of the cover part facing the LED. In addition, a plurality of second protrusions along the longitudinal direction of the cover part are provided on the outer surface side of the cover part in the short direction of the cover part, and the first protrusion on the side wall part of the cover part. it is preferable that provided with the fitting recess in the ridges.

  The LED unit of the present invention makes it easier to assemble the LED unit.

It is a substantially longitudinal cross-sectional view which shows the LED unit of this embodiment. It is a schematic perspective view of the back side which shows the principal part of an LED unit same as the above. It is a longitudinal cross-sectional view which shows the principal part of an LED unit same as the above. It is a schematic perspective view of the front side which shows the principal part of an LED unit same as the above. It is a general | schematic cross-sectional view which shows the principal part of an LED unit same as the above. It is a disassembled perspective view of the front side which shows an LED unit same as the above. It is a disassembled perspective view of the back side which shows an LED unit same as the above. It is a perspective view of the back side which shows an LED unit same as the above. It is explanatory drawing of the back side which shows the principal part of another LED unit same as the above.

  Hereinafter, the LED unit 10 of this embodiment is demonstrated based on FIG. 1 thru | or FIG. In addition, the same number is attached | subjected to the same member in the figure.

  The LED unit 10 of this embodiment includes an LED 1a and a mounting board 2 that is formed in a long plate shape and mounts a plurality of LEDs 1a on the one surface 2aa side in the longitudinal direction (see FIG. 1 and FIG. 1). (See FIG. 6). In addition, the LED unit 10 includes a bottom 3c1 facing one surface 2aa of the mounting substrate 2 and side wall portions 3c2 and 3c2 extending from the bottom 3c1 to the mounting substrate 2 side, and a cross-section covering the mounting substrate 2 is C-shaped. A long translucent cover 3 is provided.

  The mounting substrate 2 is elongated along the longitudinal direction of the mounting substrate 2, and the other surface 2 ba side of the mounting substrate 2 is held by a heat dissipation member 5 that dissipates heat from the mounting substrate 2. Moreover, the heat radiating member 5 is accommodated in the cover part 3, and the main piece 5a which contact | abuts the other surface 2ba side of the mounting substrate 2, and a pair extended in the thickness direction of the main piece 5a from the both ends of the main piece 5a along a longitudinal direction. Side piece 5b. Each of the pair of side pieces 5b, 5b includes a protruding portion 5ba that protrudes outward from the side piece 5b. Further, the cover portion 3 is positioned on the side wall portion 3c2 with respect to the heat radiating member 5 and the fitting concave portion 3ca that is fitted to the protrusion portion 5ba to couple the cover portion 3 and the heat radiating member 5. And a guide portion 3cb that guides the protruding portion 5ba to the fitting recess 3ca.

  Thereby, the LED unit 10 of this embodiment can make the assembly of the LED unit 10 easier.

  Hereinafter, each configuration of the LED unit 10 of the present embodiment will be described in more detail.

  The LED unit 10 of the present embodiment can be attached by appropriately processing the fixture body 11 of a long lighting fixture (not shown), for example, as an alternative to a conventional straight tube fluorescent tube. In addition, the LED unit 10 is not restricted to what is used for a elongate lighting fixture, It can be used for a rectangular-shaped lighting fixture and various shapes lighting fixture.

  The LED unit 10 of the present embodiment mainly includes an LED 1a, a mounting substrate 2, a cover portion 3, and a heat dissipation member 5 that constitute the light source unit 1.

  The light source unit 1 is provided on the one surface 2aa side of the mounting substrate 2 having a conductor pattern (not shown). The light source unit 1 is a sealing unit that seals a plurality of LEDs 1a with a rectangular LED 1a that is a plurality of semiconductor light emitting elements mounted on one surface 2aa of the mounting substrate 2 and a translucent material containing a phosphor. Member 1b. The LEDs 1a are mounted along the longitudinal direction of the long mounting substrate 2 so as to be arranged at substantially equal intervals on the central portion (the central portion in the short direction) of the one surface 2aa of the mounting substrate 2 (FIG. 1 and FIG. 6). The sealing member 1b is formed in a line shape along the longitudinal direction of the mounting substrate 2 at the center of the one surface 2aa of the mounting substrate 2 in plan view. The light source unit 1 can radiate light that has been wavelength-converted by the phosphor and the wavelength-converted light emitted from the LED 1a.

LED1a used for the LED unit 10 of this embodiment is a semiconductor light emitting element which can radiate | emit light by electric power feeding. As the LED 1a, for example, an LED chip using a gallium nitride compound semiconductor such as InGaN capable of emitting blue light can be used. The sealing member 1b of the light source unit 1 is a silicate-based material doped with rare earth such as (Sr, Ba) ₂ SiO ₄ activated with Eu that absorbs blue light and emits complementary yellow light. It has a phosphor. The phosphor is not limited to a silicate-based phosphor doped with rare earth. As the phosphor, for example, an aluminate-based phosphor doped with rare earth such as Y ₃ Al ₅ O ₁₂ activated with Ce or Tb ₃ Al ₅ O ₁₂ activated with Ce can be used. . As the sealing member 1b, a light-transmitting material such as silicone resin, epoxy resin, or glass containing a phosphor can be used. Thereby, the light source part 1 can radiate | emit white light etc. by the color mixture of the blue light from LED1a and the yellow light from the fluorescent substance contained in the sealing member 1b, for example. In addition, LED1a is not restricted only to what radiates | emits blue light, For example, what radiates | emits an ultraviolet-ray may be used. In this case, the phosphor of the sealing member 1b absorbs blue light and emits yellow light, instead of absorbing blue light and emitting blue light, blue phosphor emitting green light, and green phosphor emitting green light. A red phosphor that emits red light may be used.

  Furthermore, instead of using the sealing member 1b containing a phosphor, the light source unit 1 is made of a translucent material that does not contain a phosphor, a red LED chip that emits red light, a green LED chip that emits green light, and White light can also be emitted as a configuration using a sealing member that covers a blue LED chip that emits blue light. The LED chip can be surface-mounted and electrically connected to the conductor pattern on the one surface 2aa of the mounting substrate 2 by reflow soldering or the like. The LED 1a may be a bare LED chip alone, or a surface-mounted light-emitting diode in which the LED chip is covered with a package such as a synthetic resin and a lead terminal for power supply is provided outside.

  A plurality of LEDs 1a are mounted on one surface 2aa of the mounting substrate 2, and each LED 1a is electrically connected in series, parallel connection, or series-parallel connection using a conductor pattern on the surface 2aa side of the mounting substrate 2. You may let them. The LEDs 1a may be appropriately arranged on the one surface 2aa side of the mounting substrate 2 along the longitudinal direction of the long mounting substrate 2 in a straight line shape, a matrix shape, a staggered shape, or the like in plan view.

  The mounting substrate 2 is formed in a long plate shape so that a plurality of LEDs 1 a can be mounted in the longitudinal direction of the mounting substrate 2. As the mounting substrate 2, for example, a substrate in which a conductor pattern using a metal material (for example, Au) is formed on an insulating substrate made of a ceramic substrate such as an alumina ceramic substrate or an aluminum nitride substrate can be used. . Further, the mounting substrate 2 can be a glass epoxy resin substrate, a metal base substrate, or the like.

  The mounting board 2 can join the LED 1a and a die pad portion made of a part of the conductor pattern provided on the one surface 2aa of the mounting board 2 by using a bonding material such as AuSn, solder or silver paste. it can. In the mounting substrate 2, a protective film made of a synthetic resin or the like may be appropriately formed on the one surface 2aa of the mounting substrate 2 in order to protect the conductor pattern electrically and mechanically. The mounting substrate 2 may be formed with a white paint film on the one surface 2aa side of the mounting substrate 2. The mounting substrate 2 can also reflect the direct light from the LED 1a efficiently by the white coating film. Moreover, the mounting substrate 2 can also reflect the reflected light from the below-mentioned 1st protrusion part 3ba provided in the cover part 3 to the cover part 3 side efficiently with a white coating film.

  The mounting substrate 2 may be mounted on the other surface 2ba side of the mounting substrate 2 opposite to the one surface 2aa on which the LED 1a is mounted by using a solder or the like for the circuit component of the lighting circuit for lighting the LED 1a. . The mounting substrate 2 is a through wiring (see FIG. 5) in which a conductor pattern on one surface 2aa side on which the LED 1a is mounted and a conductor pattern (not shown) on the other surface 2ba side are provided in the thickness direction of the mounting substrate 2. (Not shown) can be electrically connected. Moreover, the mounting substrate 2 can suitably include a connection connector 2c that is electrically connected to the LED 1a on the one surface 2aa side. The LED unit 10 can also be configured by electrically connecting a plurality of mounting boards 2 via a connection cord (not shown) connected to the connection connector 2c.

The cover 3 is formed in a long shape with a C-shaped cross section covering the mounting substrate 2. The cover part 3 can be formed of a synthetic resin having translucency such as an acrylic resin or a polycarbonate resin. Cover portion 3 has a bottom portion 3c1 facing the one surface 2 aa of the mounting board 2 LED1a is mounted. The cover portion 3 includes a side wall portion 3c2 along the longitudinal direction of the mounting substrate 2 surrounding the periphery of the bottom portion 3c1, and a side wall portion 3c3 along the short direction of the mounting substrate 2 surrounding the periphery of the bottom portion 3c1. (See FIGS. 4-7). The cover part 3 is formed in a long rectangular box shape by a bottom part 3c1, a pair of opposing side wall parts 3c2, 3c2, and a pair of opposing side wall parts 3c3, 3c3. That is, the cover 3 is integrally formed with the bottom 3c1, the side wall 3c2, and the side wall 3c3.

  By the way, LED1a is a point light source compared with the straight tube | pipe type fluorescent tube which is a linear light source which is 1 type of a fluorescent lamp. Moreover, LED1a is equipped with the optical characteristic with a strong directivity compared with a straight tube | pipe type fluorescent tube. In the luminaire, uneven light emission tends to occur simply by using an LED unit in which the LEDs 1a are arranged in a straight line instead of the straight tube fluorescent tube used in the conventional luminaire. That is, the LED unit tends to have difficulty in obtaining uniform light emission equal to or higher than that of the straight tube fluorescent tube even if the plurality of LEDs 1a are arranged in a straight line.

  Therefore, as shown in FIG. 1 to FIG. 5, the cover portion 3 is arranged on the inner surface 3 b side of the cover portion 3 facing the LED 1 a along the short direction of the cover portion 3 (the left-right direction of the paper surface of FIG. 1). A plurality of one protrusion 3ba are provided in the longitudinal direction of the cover 3 (the left-right direction on the paper surface of FIG. 5). Further, the cover part 3 has a plurality of second protrusions 3 aa in the short direction of the cover part 3 on the outer surface 3 a side of the cover part 3 along the longitudinal direction of the cover part 3.

  The cover portion 3 has the first protrusion 3ba formed on the inner surface 3b side of the cover portion 3 facing the LED 1a along the longitudinal direction of the cover portion 3, thereby causing light diffusion due to internal reflection. be able to. The LED unit 10 generates light L2 and L3 in which light from the LED 1a is diffused by internal reflection or the like with a plurality of first protrusions 3ba formed on the inner surface 3b side of the cover 3 (see FIG. 5). ). In addition, the light L3 has illustrated the light by which the light from LED1a was reflected by the 1st protrusion part 3ba and re-reflected on the surface of the mounting board 2, for example. Thereby, the LED unit 10 can suppress the gap between the plurality of LEDs 1a from becoming dark, and can emit more uniform light.

  Further, the cover 3 is configured such that the second protrusion 3aa is formed on the outer surface 3a side of the cover 3 along the short direction of the cover 3 so that the light from the LED 1a is transmitted to the cover 3 short. Can be spread in the hand direction. That is, the LED unit 10 transmits the light L1 from the LED 1a to the short side of the cover part 3 by a plurality of second protrusions 3aa formed on the outer surface 3a side of the cover part 3 along the longitudinal direction of the cover part 3. Control can be performed so as to spread in the hand direction (see FIG. 3).

  That is, the 1st protrusion part 3ba and 2nd protrusion part 3aa of the cover part 3 can ease the directivity of the light from LED1a, and can radiate | emit more uniform light.

  The LED unit 10 is not particularly limited in the number of the first protrusions 3ba and the second protrusions 3aa formed in the cover part 3, but relaxes the directivity of light from the LED 1a, What is necessary is just to adjust suitably so that more uniform light can be radiated | emitted. In addition, the LED unit 10 can reduce the directivity of light from the LED 1a and radiate more uniform light with the shapes of the first and second protrusions 3ba and 3aa formed on the cover part 3. And may be set as appropriate. The first protrusion 3ba can have a shape that rises smoothly from a recess 3bb that is recessed from the inner surface 3b of the cover 3, for example. The 2nd protrusion part 3aa can be made into the shape of a protrusion which continues smoothly with the recessed part 3ab dented in the outer surface 3a of the cover part 3, for example.

  In the cover portion 3, the bottom portion 3c1 is curved in an arc shape toward the outside in the short direction of the cover portion 3 (see FIG. 1). Thereby, the cover part 3 can refract the light which injects into the bottom part 3c1 of the cover part 3 from LED1a in the transversal direction of the cover part 3, and can radiate | emit it from the LED unit 10. FIG. In other words, the LED unit 10 can spread the light from the LED 1 a in the short direction of the cover portion 3.

  The cover portion 3 has a fitting recess 3ca that fits the projection portion 5ba protruding outward of the side piece 5b of the heat radiating member 5 and couples the cover portion 3 and the heat radiating member 5 in the side wall portion 3c2. Yes. Further, the cover portion 3 has a guide portion 3cb that determines the position of the cover portion 3 with respect to the heat radiating member 5 and invites the protruding portion 5ba to the fitting recess 3ca near the fitting recess 3ca in the side wall portion 3c2. Have. The guiding portion 3cb functions as positioning of the protruding portion 5ba when the protruding portion 5ba formed on the side piece 5b of the heat radiating member 5 is pushed into the fitting recessed portion 3ca and the cover portion 3 and the heat radiating member 5 are coupled. Can do. In addition, the guiding portion 3cb can fulfill the function of guiding the protrusion 5ba into the fitting recess 3ca and guiding the fitting portion 3ca into the fitting recess 3ca when the cover portion 3 and the heat dissipation member 5 are coupled.

  Thereby, the LED unit 10 of this embodiment makes it easy to couple the cover unit 3 and the heat dissipating member 5 that holds the mounting substrate 2, and makes it easier to assemble the LED unit 10.

Further, as described above, the cover portion 3 has a plurality of first protrusions 3ba along the short direction of the cover portion 3 in the longitudinal direction of the cover portion 3 on the inner surface 3b side of the cover portion 3 facing the LED 1a. doing. Further, the cover part 3 has a plurality of second protrusions 3 aa in the short direction of the cover part 3 on the outer surface 3 a side of the cover part 3 along the longitudinal direction of the cover part 3. Here, the cover 3 in the LED unit 10 of the present embodiment is provided with a fitting recess 3ca in the first protrusion 3ba on the side wall 3c2 of the cover 3. The LED unit 10 has the first protrusion 3ba provided with the fitting recess 3ca, so that the protrusion 5ba protrudes from the side wall 3c2 compared to the flat side wall 3c2 of the cover 3. It is possible to increase the fitting allowance to be fitted to the fitting recess 3ca provided in the one protrusion 3ba.

  In addition, the cover part 3 used for the LED unit 10 of this embodiment is not restricted only to the cover part 3 formed in the elongate rectangular box shape. Therefore, as shown in FIG. 9, the cover 3 covers the mounting substrate 2 with a long rectangular box-shaped cover 3 in which a plurality (two in this case) of cover portions 3A and 3B are connected. But you can.

  The cover part 3 shown in FIG. 9 is configured by connecting cover parts 3 </ b> A and 3 </ b> B along the longitudinal direction of the cover part 3. As for the cover part 3, connection part 3Aa and 3Ba which connect adjacent cover site | parts 3A and 3B comprise at least one part of 1st protrusion part 3ba.

  In other words, the cover portion 3 is like a stamped joint that connects the connecting portion 3Aa, which is the male portion with the protruding end of the cover portion 3A, and the connecting portion 3Ba, where the end portion of the facing cover portion 3B is the female portion. It has a structure. Here, in the cover part 3A, the protruding length (3A1) of the male part is slightly shorter than the width (3P) of the first protrusion 3ba. Similarly, in the cover part 3B, the cut length (3B1) of the female part is substantially the same as the protruding length (3A1) of the male part. Further, in the connecting portions 3Aa and 3Ba in which the cover portion 3A and the cover portion 3B are connected, the connecting portions 3Aa and 3Ba are connected with the same width as the width (3P) of the other plurality of first protrusions 3ba in each of the cover portions 3A and 3B. 1st protrusion part 3ba is comprised.

  Note that the LED unit 10 may have one first protrusion 3ba or a plurality of first protrusions in the connecting portions 3Aa and 3Ba connecting the cover portion 3A and the cover portion 3B. 3ba may be configured. Further, the LED unit 10 is configured such that the second protrusion 3aa is continuous over the cover part 3A and the cover part 3B in the connecting parts 3Aa and 3Ba connecting the cover part 3A and the cover part 3B. . The protruding length (3A1) of the male part in the cover part 3A and the cut length (3B1) of the female part in the cover part 3B may be the same as or longer than the width (3P) of the first protrusion 3ba. You can also.

  Thereby, in the LED unit 10, since the connecting portions 3 </ b> Aa and 3 </ b> Ba constitute at least a part of the first protruding portion 3 ba, the other first protruding portion 3 ba provided on the inner surface of the cover portion 3 and Equivalent light is emitted, and the uniformity of light can be ensured as the entire cover portion 3. Further, the LED unit 10 can be formed by dividing the cover portion 3 into a plurality of cover portions 3A and 3B. Since the cover part 3 needs to have translucency, generally, there are many restrictions on the material to be used. Therefore, if the cover part 3 is formed long and long, distortion or the like is likely to occur, and mass productivity tends to decrease. In the LED unit 10 of the present embodiment, the long cover portion 3 can be formed by dividing it into a plurality of cover portions 3A and 3B, so that the mass productivity of the entire cover portion 3 can be improved. Here, the cover part 3 includes a fitting recess 3ca that fits the protrusion part 5ba and connects the cover part 3 and the heat dissipation member 5 in the side wall parts 3c2 and 3c2 of the cover parts 3A and 3B, and a heat dissipation member. 5 has a guide portion 3cb that determines the position of the cover portion 3 and invites the protruding portion 5ba to the fitting recess 3ca. Thereby, it is easy to fit the heat radiating member 5 separately from the cover portions 3A and 3B.

  The unit cover part 4 is formed in a long shape, and can be provided between the mounting board 2 and the heat dissipation member 5 that holds the mounting board 2 (see FIGS. 6 and 7). . The unit cover portion 4 is provided with a pair of unit reflecting portions 4 b and 4 b that protrude toward the cover portion 3 side along the longitudinal direction of the unit cover portion 4. In the unit cover part 4, the other surface 2ba side of the mounting board 2 is arranged on the main part 4a side of the unit cover part 4, and the mounting board 2 is arranged between the pair of unit reflection parts 4b and 4b. Further, the unit cover part 4 is disposed so that the mounting substrate 2 straddles each of the pair of unit cover parts 4, 4, and a gap is provided between the adjacent unit cover parts 4, 4. The unit cover part 4 can be formed of, for example, a resin material excellent in processability (for example, PBT). The unit cover part 4 can be formed by injection molding using a resin material.

  In the LED unit 10 according to the present embodiment, even if the expansion on the unit cover part 4 side increases due to the difference in thermal expansion coefficient between the unit cover part 4 formed of a resin material and the mounting board 2 using a ceramic substrate, the LED unit 10 is adjacent. The unit cover parts 4 and 4 are separated so as not to contact each other. Thereby, the LED unit 10 can suppress that the unit cover part 4 is distorted by contact between the adjacent unit cover parts 4 and 4. Thereby, the LED unit 10 can suppress that the unit cover part 4 is distorted due to the contact between the adjacent unit cover parts 4. In addition, the unit cover part 4 is divided into a plurality (two here) so that the long unit cover part 4 can be easily formed, but may be one. Further, the unit cover portion 4 may have a structure in which the mounting substrate 2 is brought into contact with and sandwiched between the pair of unit reflecting portions 4b and 4b.

  The unit cover portion 4 has a rectangular shape in which the main portion 4a of the unit cover portion 4 is slightly larger than the outer shape of the mounting substrate 2 so that the mounting substrate 2 can be disposed between the pair of unit reflecting portions 4b, 4b of the unit cover portion 4. It is said. The unit cover part 4 can be held between the pair of unit reflecting parts 4b, 4b of the unit cover part 4 by contacting the mounting substrate 2 by using the elasticity of the resin material of the unit cover part 4.

In the LED unit 10 of the present embodiment, the LED 1a is mounted on the one surface 2aa of the mounting substrate 2, and the heat dissipation member 5 is in contact with the other surface 2ba of the mounting substrate 2 (FIGS. 1 and 4). And see FIG. Therefore, in the unit cover part 4, the main part 4a of the unit cover part 4 is interposed between the main piece 5a of the heat dissipation member 5 and the LED 1a. The unit cover part 4 has a main part 4a and a pair of parts that rise from a side of both ends (both ends along the longitudinal direction) of the main part 4a with respect to one surface 2aa of the mounting substrate 2 at a predetermined angle (for example, 45 °). The unit reflecting portions 4b and 4b are integrally formed. That is, the unit reflecting portion 4b has a function of reflecting the light emitted from the LED 1a to the side toward the front of the cover portion 3 on the bottom 3c1 side. The unit cover portion 4 is inclined with respect to the one surface 2aa of the mounting substrate 2 so that the pair of unit reflecting portions 4b, 4b open outward as the distance from the main portion 4a increases. The unit reflecting portion 4b of the unit cover portion 4 is a reflecting surface 4ba that reflects light emitted from the LED 1a forward on the surface side facing the LED 1a. In other words, the LED unit 10 includes the unit reflecting portion 4b that reflects the light emitted from the LED 1a in the short direction of the mounting substrate 2 toward the bottom 3c1 side, and the short side of the mounting substrate 2 along the longitudinal direction of the mounting substrate 2. It is provided at each end of the direction.

If LED unit 10 forms 2nd protrusion part 3aa to the side wall part 3c2 of the cover part 3, the light from LED1a tends to be easily radiated | emitted to the back side (upper side of the paper surface of FIG. 1) of LED unit 10. is there. Therefore, in the cover portion 3, the extending direction of the reflection surface 4ba of the pair of unit reflection portions 4b inclined with respect to the one surface 2aa of the mounting substrate 2 intersects the cover portion 3 in the C-shaped cross section shown in FIG. It is preferable to form the second protrusion 3aa only within the range between the intersecting points. Compared with the LED unit 10 in which the second protrusion 3aa is formed up to the side wall 3c2 which is the side surface of the cover 3, the LED unit 10 can spread light emitted from the LED 1a on the back side. Suppress. That is, the LED unit 10 is formed with the second protrusion 3aa only at a specific portion of the cover 3 in the cross section, so that the light emitted from the LED unit 10 is not effectively used. It becomes possible to suppress becoming.

  The unit cover portion 4 has a long hole shape through which the protruding portion 5aa of the heat radiating member 5 is inserted in a state where the main portion 4a of the unit cover portion 4 is placed on the main piece 5a of the long heat radiating member 5. Is inserted through the center of the main portion 4a (see FIGS. 5, 6 and 7). Furthermore, the unit cover portion 4 has a wall portion 4 e protruding from one end side in the longitudinal direction of the unit cover portion 4 so as to close the end portion of the heat radiating member 5. Further, the unit cover part 4 has a plurality of (in this case, four) positioning projections 4d that are respectively inserted into a plurality of positioning holes 5ab provided in the main piece 5a of the heat radiating member 5. The positioning protrusions 4d are formed in a columnar shape that protrudes from both ends of the unit cover portion 4 in the short direction (the left-right direction in the drawing of FIG. 7) toward the heat radiating member 5. The positioning protrusions 4d are disposed at both ends of the unit cover portion 4 in the longitudinal direction (vertical direction of the paper surface of FIG. 7). In the LED unit 10, the positioning projection 4 d of the unit cover portion 4 is inserted into each of the positioning holes 5 ab penetrating the main piece 5 a of the heat radiating member 5. Further, in the LED unit 10, the protruding portion 5 aa of the heat radiating member 5 is inserted into the insertion hole 4 aa provided in the main portion 4 a of the unit cover portion 4. Thereby, the LED cover 10 positions the unit cover part 4 with respect to the heat radiating member 5.

  Further, the unit cover portion 4 is integrally formed with each positioning projection 4d and has a columnar projection 4c that projects in the opposite direction to the positioning projection 4d (downward in the plane of FIG. 6). The protrusion 4c can support the cover 3 that covers the mounting substrate 2 on which the LED 1a is mounted from the front and the side. The unit cover part 4 is provided with a locking claw 4f protruding outward (in a direction away from the main part 4a) from the side opposite to the reflection surface 4ba of the unit reflection part 4b (see FIG. 7). The unit cover portion 4 is inserted and locked in a locking hole (not shown) provided in the side piece 5b of the heat radiating member 5 with the locking claw 4f. Thereby, the LED unit 10 is prevented from coming off between the heat radiating member 5 and the unit cover portion 4. Note that the protrusion 4 c of the unit cover portion 4 is not limited to the one having a function of supporting the cover portion 3. The protrusion 4c may have a function of plastically deforming and fixing the protrusion 4c by heat so that the LED unit 10 and the heat dissipation member 5 are in close contact with each other after the LED unit 10 is locked to the unit cover portion 4. . Similarly, the positioning protrusion 4d can also plastically deform the positioning protrusion 4d inserted through the positioning hole 5ab by heat to fix the unit cover portion 4 and the heat dissipation member 5.

The heat radiating member 5 is formed in a long shape along the longitudinal direction of the mounting substrate 2. The heat radiating member 5 holds the other surface 2ba of the mounting substrate 2 so that heat from the mounting substrate 2 can be radiated through the unit cover portion 4. More specifically, the heat radiating member 5 has an H-shaped cross section and is formed in a long shape. The heat radiating member 5 includes a main piece 5a on which the mounting substrate 2 on which the LED 1a is mounted is placed via the unit cover portion 4, and the main piece 5a from both ends (both ends along the longitudinal direction) of the main piece 5a. A pair of side pieces 5b, 5b extending in the thickness direction are integrally formed. The heat radiating member 5 can be formed using, for example, an aluminum material as a material having high thermal conductivity. The heat radiating member 5 can be formed by bending a plate of aluminum material. Further, the heat dissipating member 5 radiates heat from the LED 1a through the mounting substrate 2, so that a plurality (two in this case) of projecting ridge portions projecting to one surface side of the main piece 5a along the longitudinal direction. 5aa is provided.

  The attachment member 6 is formed in a long plate shape having a C-shaped cross section. The attachment member 6 includes a long rectangular bottom plate 6a and a pair of side plates 6b that rise toward the heat radiating member 5 from both ends along the longitudinal direction of the bottom plate 6a. The attachment member 6 is formed by bending a metal plate such as a steel plate. The attachment member 6 is fixed to the heat radiating member 5 in a state of being accommodated between the side pieces 5b, 5b of the heat radiating member 5. The attachment member 6 is provided with screw holes 6ab on both ends in the longitudinal direction of the bottom plate 6a of the attachment member 6. Moreover, the heat radiating member 5 is provided with screw insertion holes 5ac on both ends in the longitudinal direction of the main piece 5a of the heat radiating member 5. The LED unit 10 can be fixed by screwing the screw insertion hole 5ac of the heat radiating member 5 and the screw hole 6ab of the mounting member 6 with a fixing screw (not shown). The LED unit 10 is not limited to one that fixes the attachment member 6 and the heat dissipation member 5 using a fixing screw. The LED unit 10 may be fixed by caulking a caulking claw 6 c provided on the attachment member 6 and a receiving portion (not shown) provided on the heat radiating member 5. Further, the attachment member 6 is attached with a receptacle connector 7 for electrical connection to the instrument body 11 side using an attachment fitting 8.

  The receptacle connector 7 includes a connection terminal portion 7a to which an electric wire (not shown) for supplying power to the LED 1a is connected via a conductor pattern of the mounting board 2 and the like, and a plug connector (not shown) on the instrument body 11 side. ) Is inserted (see FIGS. 6, 7 and 8). The plug connector is connected to a lighting device (not shown) provided on the instrument body 11 side, and is configured such that the receptacle connector 7 can be removably inserted into and connected to the plug connector. That is, the LED unit 10 is electrically connected between the lighting device on the side of the instrument body 11 and the LED 1a by plugging and connecting the plug connector and the receptacle connector 7 together. The LED unit 10 only needs to be able to electrically connect the lighting device on the fixture body 11 side and the LED 1a, and may have a configuration in which the fixture body 11 side is a receptacle connector and the LED unit 10 side is a plug connector. Although the lighting device is not shown, for example, a rectifying / smoothing unit that rectifies an alternating current supplied from an external commercial power supply (not shown) and then smoothes and outputs the direct current; A constant current power supply unit that supplies the direct current output from the unit to the LED 1a side while maintaining a constant constant current value can be employed.

  The LED unit 10 is connected to the receptacle connector 7 through a lighting device on the side of the instrument body 11 that is electrically connected to an external commercial power source or the like. The LED unit 10 can supply power to the LED 1 a through an electric wire (not shown) through a receptacle (not shown) penetrating from the receptacle connector 7 to the unit cover portion 4.

  The mounting bracket 8 has a rectangular frame-shaped connector holding portion 8 a that holds the receptacle connector 7. Further, the mounting bracket 8 has a substantially trapezoidal support portion 8b bent and raised from the end portion of the connector holding portion 8a, and a pair of fixed claws 8c protruding from the tip of the support portion 8b. The mounting bracket 8 can be integrally formed, for example, by bending a metal plate such as a steel plate. In the mounting bracket 8, the fixing claws 8 c of the mounting bracket 8 are inserted into a pair of fixing grooves 6 aa formed at the end of the bottom plate 6 a of the mounting member 6. In addition, the mounting bracket 8 is formed with screws (not shown) inserted into screw insertion holes 8 d penetrating the support portion 8 b of the mounting bracket 8 at both longitudinal ends of the bottom plate 6 a of the mounting member 6. By screwing into the screw hole 6ab, the screw is fixed to the bottom plate 6a.

  Next, the assembly procedure of the LED unit 10 of this embodiment is demonstrated.

  In assembling the LED unit 10, first, the mounting substrate 2 on which the LED 1 a is mounted is placed on the placement surface of each main part 4 a of the pair of unit cover parts 4. In the LED unit 10, each unit cover portion 4 and the mounting substrate 2 are coupled by an appropriate method such as caulking or bonding. At this time, the LED unit 10 is configured such that the mounting substrate 2 placed on the placement surface of the unit cover portion 4 contacts the unit cover portion 4 along the longitudinal direction, so that the unit cover portion 4 and the mounting substrate 2 Can be suppressed.

  Subsequently, in the LED unit 10, in the assembly of the LED unit 10, the unit cover portion 4 on which the mounting substrate 2 is placed is attached to the main piece 5 a of the heat radiating member 5. The unit cover portion 4 is inserted and locked with the locking claw 4f of the unit cover portion 4 in a locking hole provided in the side piece 5b of the heat radiating member 5, and the unit cover portion 4 is prevented from being detached from the heat radiating member 5. Is done. In the LED unit 10, the mounting member 6 to which the receptacle connector 7 is mounted by the mounting bracket 8 is fixed to the heat radiating member 5.

  Finally, in the assembly of the LED unit 10, the LED unit 10 covers the heat radiating member 5 with the cover 3 in such a direction that the bottom 3 c 1 of the cover 3 is opposed to the LED 1 a. Here, in assembling the LED unit 10, the positions of the protrusion 5 ba of the heat radiating member 5 and the guide portion 3 cb of the cover 3 are matched. Subsequently, in the LED unit 10, the protrusion 5 ba formed on the side piece 5 b of the heat radiating member 5 is pushed into the fitting recess 3 ca. Thereby, in the LED unit 10, it becomes possible to combine the cover part 3 and the heat radiating member 5. FIG. In addition, the guide part 3cb has a recess shape in which the depression gradually decreases toward the fitting recess 3ca, and can perform a function of guiding the protrusion 5ba into the fitting recess 3ca. As described above, the LED unit 10 of the present embodiment can more easily assemble the LED unit 10.

1a LED
2 mounting substrate 2aa one surface 2ba other surface 3 cover portion 3a outer surface 3aa second ridge portion 3b inner surface 3ba first ridge portion 3c1 bottom portion 3c2 side wall portion 3ca fitting recess 3cb guide portion 5 heat radiating member 5a main piece 5b side piece 5ba Protrusion 10 LED unit

Claims (2)

LED, a mounting board that is formed in a long plate shape and mounts the plurality of LEDs on one surface side in the longitudinal direction, a bottom portion facing the one surface of the mounting substrate, and the mounting substrate from the bottom portion An LED unit having a side wall portion extending to the side and a long translucent cover portion having a C-shaped cross section covering the mounting substrate,
The mounting substrate is held on the other surface side of the mounting substrate in a heat dissipation member that radiates heat from the mounting substrate in a long shape along the longitudinal direction of the mounting substrate,
The heat dissipating member is housed in the cover part and contacts a main piece contacting the other surface side of the mounting board, and a pair of sides extending in the thickness direction of the main piece from both ends of the main piece along the longitudinal direction and a strip, each of the pair of side pieces comprises a plurality of impact force portion provided along the longitudinal direction of the butt out the side piece to the outside of the side piece,
The cover part is in the side wall portion, and a plurality of fitting recesses Ru coupled with said heat radiating member and the cover portion is fitted to another each with a plurality of front Symbol projections, with respect to the heat dissipation member, the and determining the longitudinal position of the cover portion, and a derivative cormorant plurality of induction portion the protrusion into the fitting recess,
The LED unit is characterized in that the guide portion has a concave shape in which a dent gradually decreases toward the fitting recess . The cover part has a plurality of first protrusions in the longitudinal direction of the cover part on the inner surface side of the cover part facing the LED in the longitudinal direction of the cover part. A plurality of second ridges along the longitudinal direction of the cover portion are provided on the outer surface side in the short direction of the cover portion, and the fitting is performed on the first ridge portion of the side wall portion of the cover portion. The LED unit according to claim 1, wherein a joint recess is provided.

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