JP2011159447A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system capable of downsizing a substrate. <P>SOLUTION: The device is provided with a substrate 25 mounting LEDs 24, a heat radiator 22 mounting the substrate 25, and lens holders 27 retaining lenses 26 for controlling light from the LEDs 24. A screw 38 is screwed into the heat radiator 22 from a front side of the lens holders 27 through the lens holders 27 and the substrate 25. A head part of the screw 38 is in contact with the front side of the lens holders 27 and the lens holders 27 are intercalated between itself and the substrate 25. An insulation distance between the screw 38 and a conductive part of the substrate 25 may be secured with an axis part of the screw 38 as a reference, so that the substrate 25 can be downsized. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lighting device using a semiconductor light emitting element as a light source.

  2. Description of the Related Art Conventionally, for example, some lighting devices such as spotlights used for illuminating exhibits have used LEDs as light sources.

  Such an illuminating device includes a lamp body having a substrate on which a plurality of LEDs are mounted, a plurality of lenses that project light from each LED, and a main body that houses these substrates and lenses.

  The substrate is made of a metal having good thermal conductivity, and an insulating layer is formed on the front surface thereof. A wiring layer having a predetermined pattern is formed on the insulating layer, and a plurality of LEDs are mounted on the wiring layer. ing. The rear surface of the substrate is attached to a radiator that the main body has, and heat generated by the LEDs during lighting is conducted from the substrate to the radiator so that the heat can be dissipated from the radiator (see, for example, Patent Document 1).

  Further, in order to improve the thermal conductivity from the substrate to the heat radiating body, the substrate is fastened and fixed to the heat radiating body with screws, and the substrate is adhered to the heat radiating body. The screw has a shaft portion passing through the substrate from the front side of the substrate and screwed into the heat radiating body, and a screw head is joined to the front surface of the substrate.

JP 2006-294526 A (page 3, FIG. 1-3)

  Current-carrying parts such as a wiring layer and a plurality of LEDs are arranged on the front surface of the substrate, and a space of a predetermined insulation distance or more must be provided between these current-carrying parts and screws.

  In the conventional lighting device, since the head of the screw is directly joined to the substrate, it is necessary to secure an insulation distance from the current-carrying portion with reference to the outermost diameter portion of the head of the screw. Therefore, for example, when a screw is arranged between a plurality of LEDs mounted on a board, each LED is arranged so as to be spaced from the outermost diameter portion of the screw head so as to have a predetermined insulation distance or more. Therefore, there is a problem that the substrate becomes large and the lighting device becomes large.

  The present invention has been made in view of these points, and an object thereof is to provide an illumination device that can be miniaturized.

  The lighting device according to claim 1, wherein a wiring layer is formed on a front surface and a semiconductor light emitting element is mounted on the wiring layer; a heat radiator to which a rear surface of the substrate is attached; and light from the semiconductor light emitting element A lens for controlling light; and a lens holder having an insulating property provided with a holder for holding the lens and having a mounting base attached to the heat radiating body with a substrate interposed therebetween; And a metal part that is attached to the heat dissipating body via an attachment base from the front side.

  The semiconductor light emitting element includes, for example, an LED chip element or an EL element, and the number may be one or plural.

  The substrate is made of, for example, a metal such as aluminum or a ceramic having thermal conductivity. A wiring layer having a predetermined pattern is formed on the insulating layer on the front surface, and a semiconductor light emitting element is mounted on the wiring layer. Has been. The wiring layer is made of a material such as copper, for example, over a wide area of the substrate, and improves heat dissipation and thermal conductivity to the substrate body.

  The radiator is made of a metal such as aluminum, for example, and preferably has a front surface provided in a flat shape so that the substrate comes into surface contact and has high thermal conductivity, and a heat radiation structure is provided on the rear side. May be.

  The lens is made of, for example, synthetic resin or glass, and when there are a plurality of semiconductor light emitting elements, a plurality of lenses are used.

  The mounting base of the lens holder may have a shape in which a part of the mounting base abuts on the substrate and the rest is separated from the substrate, or is provided in a plate shape so that substantially the entire rear surface of the mounting base abuts on the substrate. May be.

  The metal component includes, for example, a screw for attaching the substrate and the lens holder to the heat radiator, and a ground terminal for connecting a ground wire to the heat radiator. In the case of a screw, the screw is attached by being screwed into the heat radiating body via the attachment base from the front side of the attachment base of the lens holder. In the case of the ground terminal, the lens base is connected to the heat radiating body with screws or the like from the front side of the mounting base of the lens holder.

  The illuminating device according to claim 2 is the illuminating device according to claim 1, wherein an attachment portion of the lens holder includes an enclosing portion surrounding the periphery of the metal component and an intervening portion interposed between the metal component and the substrate. The metal component attachment part which has is provided.

  For example, the surrounding portion is provided in a concave shape that opens to the front surface of the attachment base portion, and an interposition portion is provided at the bottom of the concave surrounding portion.

  The lighting device according to claim 3 is the lighting device according to claim 1 or 2, wherein the metal part is a screw having a shaft portion and a head portion, and the shaft portion of the screw penetrates the mounting base portion of the lens holder to dissipate heat. It is attached to the body, and the head of the screw is disposed in contact with the front side of the attachment base of the lens holder.

  Accordingly, it is only necessary to secure the insulation distance of the current-carrying portion of the substrate with reference to the shaft portion of the screw, and the size of the substrate can be reduced as compared with the case where the insulation distance is secured with respect to the head portion of the screw. Further, the substrate and the lens holder are fastened and fixed to the heat radiating body with screws.

  The lighting device according to claim 4 is the lighting device according to claim 1 or 2, wherein the radiator is made of metal, and the front surface of the mounting base portion of the substrate and the lens holder penetrates the ground and protrudes from the front surface of the mounting base portion. An attachment portion is provided, and the metal part is a ground terminal attached to an earth attachment portion protruding from the front surface of the attachment base portion of the lens holder.

  Accordingly, it is only necessary to secure the insulation distance of the current-carrying portion of the substrate with reference to the ground attachment portion, and the substrate can be reduced in size as compared with the case of securing the insulation distance with reference to the ground terminal. The ground terminal is attached to the tip of the ground wire wired together with the electric power supply wire electrically connected to the wiring layer on the front surface of the substrate, for example, and is attached to the ground attachment portion with a screw.

  According to the illumination device according to claim 1, since the metal part is attached to the radiator from the front side of the attachment base part of the lens holder via the attachment base part, the insulation between the metal part and the energized part of the substrate is ensured. However, the substrate can be miniaturized, and the lighting device can be miniaturized.

  According to the illuminating device of claim 2, in addition to the effect of the illuminating device of claim 1, the surrounding part of the metal part mounting portion provided on the mounting base of the lens holder surrounds the metal part, and the metal part mounting Since the intervening portion of the portion is interposed between the metal component and the substrate, the insulation of the metal component can be reliably ensured.

  According to the illuminating device of claim 3, in addition to the effect of the illuminating device of claim 1 or 2, the metal part is a screw that attaches the substrate to the heat radiator and the shaft portion of the screw is a lens holder. Since the screw head is attached to the front side of the lens holder mounting base, the insulation distance between the screw and the current-carrying part of the board is determined by the screw shaft. What is necessary is just to ensure as a reference | standard, and a board | substrate can be reduced in size compared with the case where the head of a screw is used as a reference | standard.

  According to the illuminating device of claim 4, in addition to the effect of the illuminating device of claim 1 or 2, the metal part is a ground terminal connected to a metal radiator, and the ground terminal penetrates the substrate. At the same time, it is attached to the ground mounting portion of the radiator that protrudes from the front surface of the lens holder mounting base, and the lens holder mounting base is interposed between the ground terminal and the substrate. The insulation distance only needs to be secured with respect to the ground mounting portion, and the substrate can be reduced in size as compared with the case of securing with respect to the ground terminal.

It is a disassembled perspective view of the illuminating device which shows the 1st Embodiment of this invention. It is sectional drawing of a part of illuminating device same as the above. It is the perspective view which looked at a part of illumination device same as the above from the front. It is the perspective view seen from the back of an illuminating device same as the above. It is a perspective view of the installation state of an illuminating device same as the above. It is a partial cross section figure of the illuminating device which shows the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 5 show a first embodiment.

  As shown in FIG. 5, the lighting device 11 includes a lamp body (lighting device main body) 12, a support body 13 that supports the lamp body 12, and a power supply unit 14 to which the support body 13 is attached and that houses a lighting circuit (not shown). And an electric wire 15 for electrically connecting the lighting circuit of the power supply unit 14 and the lamp body 12 side.

  As shown in FIG. 1, a lamp body 12 includes a main body 23 having a front-side cover 21 and a heat radiating body 22 attached to the rear portion of the cover 21, a substrate 25 on which LEDs 24 as a plurality of semiconductor light emitting elements are mounted, A plurality of lenses 26 that project the light emitted from each LED 24 forward of the lamp body 12 and a lens holder 27 that holds these lenses 26 between the cover 21 and the lens 26 are provided.

  The cover 21 is made of, for example, synthetic resin or metal, and includes a disk-shaped front plate 30 and a cylindrical cover portion 31 that protrudes rearward from the peripheral portion of the front plate 30. Both side portions of the support member 13 are supported by a horizontal axis so as to be adjustable in the vertical direction with respect to the support 13. The front plate 30 is formed with a plurality of lens fitting holes 32 into which the lenses 26 are fitted and arranged from the rear side.

  Further, the radiator 22 is made of a metal such as aluminum, for example, and has a planar front surface portion 35 on which the substrate 25 is attached in a surface contact state, an outer surface portion 36 that is a peripheral surface adjacent to the front surface portion 35, and a rear side. Is provided with a heat radiating portion 37 protruding from the surface.

  The front surface portion 35 is formed with a concave portion 35a into which the substrate 25 is fitted and positioned.

  Near the center of the front portion 35, a screw mounting hole 39 into which a screw 38 as a metal part for fastening the substrate 25 and the lens holder 27 together with the radiator 22 is fixed is formed. A plurality of escape holes 40 are formed to allow a part of them to enter, and a ground mounting boss 41 as a ground mounting portion having a ground mounting hole 41a is projected. The projecting dimension of the ground mounting boss 41 from the front surface portion 35 is larger than the thickness dimension of the substrate 25.

  A plurality of attachment portions 43 configured by grooves and holes through which a plurality of screws 42 (see FIG. 3) to be fixed to the cover 21 are inserted are formed in the peripheral portion of the front surface portion 35.

  A wiring groove 44 that communicates from the outer surface portion 36 to the front surface portion 35 is formed in the outer surface portion 36 at the upper portion of the radiator 22. The wiring groove 44 is provided with an electric wire 15 that is drawn in from the outside of the main body 23 and is electrically connected to the substrate 25. As shown in FIGS. It has a front opening 45 that opens to the front portion 35 and a rear opening 46 that opens to the rear of the radiator 22, and the entire outer surface of the wiring groove 44, that is, the entire upper surface is opened. The width of the wiring groove 44 is wider on the front side than on the rear side, and the shape of the wiring groove 44 is substantially L-shaped in plan view.

  An electric wire holder 47 for holding the electric wires 15 arranged in the wiring grooves 44 is attached with screws 48 below the wiring grooves 44 on the rear surface of the radiator 22.

  The heat radiating portion 37 is formed with a plurality of heat radiating fins 49 arranged in the vertical direction at predetermined intervals in the horizontal direction. Between these radiation fins 49, it opens in the back and the up-down direction, respectively, and the distribution | circulation of air is possible.

  As shown in FIGS. 1 and 3, the LED 24 uses an SMD (Surface Mount Device) package with a connection terminal on which an LED chip is mounted. In this SMD package, for example, an LED chip that emits blue light is arranged in the package, and this LED chip is mixed with a yellow phosphor that emits yellow light by being excited by a part of the blue light from the LED chip. Sealed with a sealing resin such as silicone resin. Accordingly, the surface of the sealing resin becomes a light emitting surface, and white light is emitted from the light emitting surface. On the side surface of the SMD package, terminals to be soldered and connected to the substrate 25 are arranged.

  The substrate 25 is formed of a substrate body made of, for example, a metal such as aluminum or ceramics having thermal conductivity, and an insulating layer such as a resin is formed on the front surface of the substrate body, although not shown. In addition, a wiring layer having a predetermined pattern made of, for example, copper is formed on the insulating layer. A connector 52 for connecting the LED 24 and the electric wire 15 is connected and disposed on the wiring layer. In addition to the electrical connection of the LED 24 and the connector 52, the wiring layer also has a function of conducting heat of the LED 24 to the board body, and in order to improve the thermal conductivity to the board body, It is formed in a wide area range.

  The board 25 is formed with a screw insertion hole 53 through which a screw 38 for fixing the board 25 and the lens holder 27 together with the front surface portion 35 of the radiator 22 is fixed, and an earth mounting boss 41 of the radiator 22 is formed. A boss insertion hole 54 to be inserted is formed, and a plurality of positioning holes 55 for positioning the lens holder 27 are formed.

  A plurality of screw insertion grooves 56 through which screws 42 for fixing the cover 21 and the heat radiating body 22 are inserted are formed in the periphery of the substrate 25. An electric wire insertion groove 57 is formed in the upper part of the substrate 25 so as to face and communicate with the wiring groove 44 of the radiator 22, and a side portion of the electric wire insertion groove 57 is closed to face the wiring groove 44 of the radiator 22. A cover part (light-shielding part) 58 is formed. The wire insertion groove 57 is disposed at a position not facing the rear opening 46 of the wiring groove 44, and the cover 58 is disposed at a position facing the rear opening 46 of the wiring groove 44. Accordingly, the front opening 45 of the wiring groove 44 is configured as a substantial front opening 45 through which the electric wire 15 passes through a portion corresponding to the wire insertion groove 57 of the substrate 25, and the front opening 45 and the rear opening 46 of the wiring groove 44 Are configured not to face each other directly.

  The lens 26 is formed of, for example, a transparent synthetic resin or glass, and is formed on the rear surface as an incident surface on which light emitted from the LED 24 enters the lens 26. The light passing through the lens 26 is forward on the front surface. It is formed as an exit surface that emits light. At the periphery of the lens 26, a flange 60 is formed that is sandwiched and held between the lens fitting hole 32 of the cover 21 and the lens holder 27.

  The lens holder 27 has an attachment base 63 attached to the front surface of the substrate 25 and a plurality of cylindrical holder parts 64 provided integrally with the attachment base 63.

  A screw 38 is inserted into the mounting base 63, and a screw 38 is inserted between the periphery of the central holder portion 64 and the peripheral holder portion 64 to fasten the lens holder 27 and the substrate 25 together with the heat radiating body 22. Screw mounting portion 66 as a metal component mounting portion having hole 65, connector connection opening 67 that opens to face connector 52 on board 25, and ground attachment of radiator 22 inserted through boss insertion hole 54 on board 25 An opening 68 for ground attachment that opens to face the boss 41 is formed.

  As shown in FIG. 2, the screw mounting portion 66 includes a cylindrical surrounding portion 69 surrounding the head portion 38 b of the screw 38, and the bottom portion of the surrounding portion 69 between the head portion 38 b of the screw 38 and the substrate 25. A screw insertion hole 65 is formed at the center of the interposed portion 70 through which the shaft portion (screw shaft portion) 38a of the screw 38 is inserted. The interposition part 70 is brought into close contact with the front surface of the substrate 25 by tightening the screws 38, and is fixed together with the substrate 25 together with the radiator 22.

  Further, on the upper part of the lens holder 27, between the electric wire insertion groove 57 of the substrate 25 and the connector 52 and between the adjacent holder portions 64 of the lens holder 27, the front surface of the lens holder 27 is connected from the electric wire insertion groove 57 to the connector 52. An electric wire holding groove 71 is formed in which the electric wire 15 wired through the side is fitted and held.

  On the rear surface of the mounting base 63 facing the substrate 25, a plurality of positioning protrusions (not shown) for fitting and positioning in the positioning holes 55 of the substrate 25 are projected.

  The holder portions 64 of the lens holder 27, the lens fitting holes 32 of the cover 21, and the lenses 26 are arranged at positions where their centers (optical axes) correspond to the center positions of the LEDs 24 of the substrate 25 described above. Has been.

  Next, as shown in FIG. 5, the support 13 has a cylindrical shaft 74 and an arm 75 rotatably attached to the lower end of the cylindrical shaft 74 in the horizontal direction. The body 12 is supported by a horizontal axis so that the vertical angle can be adjusted.

  An electric wire 15 connected to the power supply unit 14 is inserted into the cylindrical shaft 74, and the electric wire 15 drawn from the lower end of the cylindrical shaft 74 is connected to the lamp body 12 side.

  Next, the power supply unit 14 incorporates a lighting circuit that supplies a constant current to the LED 24 through the electric wire 15, for example. The power supply unit 14 is directly attached to the ceiling surface and is supplied with power to the lighting circuit through a power line, or is attached to a wiring rail previously attached to the ceiling and is supplied with power to the lighting circuit.

  Next, the electric wire 15 is, for example, an electric wire in which a pair of electric power supply wires 78 and an earth wire 79 are combined into one, and a connector 80 connected to the connector 52 of the substrate 25 at the tip of the pair of electric power supply wires 78. Is attached, and a metal ground terminal 81 is attached to the tip of the ground wire 79. The ground terminal 81 is connected and fixed to a ground mounting boss 41 protruding to the front side of the substrate 25 with a screw 82. An electric wire holder 47 is attached to the electric wire 15 at a predetermined length position from the tip.

  Next, assembly of the lamp body 12 of the lighting device 11 will be described.

  With the front surface portion 35 of the heat radiating body 22 facing upward, the substrate 25 on which the LEDs 24 and the like are mounted is positioned on the front surface portion 35 of the heat radiating body 22. At this time, the ground mounting boss 41 protruding from the front surface portion 35 of the radiator 22 is passed through the boss insertion hole 54 of the substrate 25, and the substrate 25 is fitted and positioned in the recess 35a of the front surface portion 35 of the radiator 22.

  The lens holder 27 is disposed on the substrate 25 disposed on the front surface portion 35 of the radiator 22. At this time, a plurality of positioning protrusions protruding from the lens holder 27 are inserted into the positioning holes 55 of the substrate 25, and the lens holder 27 is positioned with respect to the substrate 25 and the radiator 22.

  The screw 38 is inserted into the screw mounting portion 66 of the lens holder 27 and screwed into the screw mounting hole 39 of the heat radiating body 22 through the screw insertion hole 65 of the screw mounting portion 66 and the screw insertion hole 53 of the substrate 25, and the lens holder 27 and the substrate Fasten 25 to the radiator 22 together. As a result, the rear surface of the substrate 25 is brought into close contact with the front surface portion 35 of the radiator 22 in a surface contact state, and the thermal conductivity from the substrate 25 to the radiator 22 is improved.

  In this state, the electric wire insertion groove 57 and the cover portion 58 of the substrate 25 are disposed at positions facing the front surface of the wiring groove 44 of the radiator 22, and a substantial front surface that is a portion corresponding to the electric wire insertion groove 57 of the substrate 25. A wiring groove 44 is formed so that the opening 45 and the rear surface opening 46 do not directly face each other. Further, the connector connection opening 67 of the lens holder 27 is disposed to face the connector 52 of the substrate 25, and the ground attachment opening 68 is disposed to face the ground attachment boss 41 projecting from the front surface of the substrate 25.

  The connector 80 of the electric wire 15 is connected to the connector 52 of the substrate 25 from the connector connection opening 67 of the lens holder 27, and the ground terminal 81 of the ground wire 79 is screwed from the ground mounting opening 68 of the lens holder 27 to the ground mounting boss 41. Secure the connection with. The tip end side of the electric wire 15 is inserted into the electric wire holding groove 71 from the front of the lens holder 27 to be positioned and held, and further, the electric wire 15 is inserted from the outside of the radiator 22 while being bent along the wiring groove 44, and arranged. The electric wire holder 47 is fixed to the rear surface of the radiator 22 with screws 48.

  On the other hand, each lens 26 is disposed in each lens fitting hole 32 of the cover 21 with the rear surface of the cover 21 facing upward.

  The heat sink 22 with the substrate 25, the lens holder 27, and the electric wire 15 attached is covered from above on the cover 21 on which the lens 26 is disposed, and each lens 26 is fitted to each holder portion 64 of the lens holder 27. Combine with radiator 22 Each screw 42 is fastened and fixed to the cover 21 through the mounting portion 43 of the radiator 22.

  Thereby, each lens 26 is sandwiched and held between the cover 21 and the lens holder 27, and the electric wire 15 is pulled out from between the upper part of the cover 21 and the radiator 22 to complete the assembly of the lamp body 12. .

  In the lighting device 11 using the lamp body 12, the power supply unit 14 is attached to the ceiling side, and the lamp body 12 is supported by the cylindrical shaft 74 and the arm 75 with respect to the power supply unit 14.

  By supplying power to the lighting circuit of the power supply unit 14, power is supplied from the lighting circuit to the LED 24 through the electric wire 15. As a result, each LED 24 emits light, and light from each LED 24 is projected from the front of the lamp body 12 through each lens 26.

  The heat generated when the LED 24 emits light is mainly efficiently conducted from the substrate 25 to the heat radiating body 22, and is radiated from the plurality of heat radiating fins 49 of the heat radiating body 22 into the air.

  Further, as shown in FIG. 2, the screw 38 for fastening the lens holder 27 and the substrate 25 together with the heat radiating body 22 has a shaft portion 38a screw insertion hole 65 of the screw mounting portion 66 of the lens holder 27 and screw insertion of the substrate 25. It is attached to the front surface portion 35 of the radiator 22 through the hole 53, and the head portion 38b is disposed in the surrounding portion 69 in a state of being in contact with the front surface side of the interposition portion 70 of the screw mounting portion 66 of the lens holder 27. ing.

  Therefore, when setting the position of a current-carrying portion such as a wiring layer formed on the front surface of the substrate 25 in a direction parallel to the front surface of the substrate 25 by a predetermined insulation distance L from the screw 38, the screw 38 is used. What is necessary is just to set to the position P1 which left | separated only the insulation distance L on the basis of this shaft part 38a.

  If the head 38a of the screw 38 abuts against the substrate 25 as in the prior art, it is necessary to set the position P2 that is separated by the insulation distance L with respect to the head 38b of the screw 38.

  Therefore, in the present embodiment, in the direction parallel to the front surface of the substrate 25, the distance between the screw 38 and the energized portion of the substrate 25 is made closer than the distance between the conventional screw 38 and the energized portion of the substrate 25. Can do.

  Thus, since the screw 38 is attached to the front surface portion 35 of the radiator 22 from the front surface side of the mounting base portion 63 of the lens holder 27 via the mounting base portion 63, the insulation between the screw 38 and the energized portion of the substrate 25 is achieved. The substrate 25 can be miniaturized while ensuring the same, and the illumination device 11 can be miniaturized.

  In particular, since the surrounding portion 69 of the screw mounting portion 66 provided on the mounting base portion 63 of the lens holder 27 surrounds the screw 38, and the interposed portion 70 of the screw mounting portion 66 is interposed between the screw 38 and the substrate 25, The insulation of the screw 38 can be reliably ensured.

  Next, FIG. 6 shows a second embodiment.

  The object is a ground terminal 81 as a metal part. One end of the ground terminal 81 is formed with a screw insertion hole 81a through which a screw 82 is inserted, and the other end protrudes laterally and a ground wire coupling portion 81b to which the ground wire 79 is caulked is formed.

  At the position of the ground terminal mounting opening 68 of the lens holder 27, a ground terminal storage portion 91 as a metal part mounting portion is provided. The ground terminal accommodating portion 91 includes a surrounding portion 92 surrounding the ground terminal 81 and an interposition portion 93 interposed between the ground terminal 81 and the substrate 25 at the bottom of the enclosing portion 92. A boss insertion hole 94 is formed through which the ground mounting boss 41 of the radiator 22 is inserted and protrudes to the front side of the interposition part 93.

  The enclosure 92 is formed in a long hole or rectangular recess corresponding to the shape of the ground terminal 81, and positioning of the ground terminal 81 in the rotational direction around the screw 82 is restricted by contact with the inner wall surface. can do.

  The projecting dimension of the ground mounting boss 41 from the front surface part 35 of the radiator 22 is formed to be larger than the combined thickness dimension of the substrate 25 and the interposition part 93.

  Then, the ground terminal 81 is inserted into the ground terminal accommodating portion 91 from the front side of the lens holder 27, and a screw 82 that passes through the screw insertion hole 81a is screwed into the ground mounting hole 41a of the ground mounting boss 41, and the ground mounting boss 41 Connected to 41.

  The ground terminal 81 connected and fixed to the ground mounting boss 41 is surrounded by a surrounding portion 92 of the ground terminal storage portion 91, and an interposition portion 93 is interposed between the substrate 25 and the ground terminal 81.

  Therefore, when setting the position of a current-carrying part such as a wiring layer formed on the front surface of the substrate 25 in a direction parallel to the front surface of the substrate 25 at a position separated from the ground terminal 81 by a predetermined insulation distance L. The position P3 may be set at a distance P3 away from the ground mounting boss 41 by the insulation distance L.

  If the ground terminal 81 directly faces the front surface of the substrate 25 as in the conventional case, insulation is performed with reference to the end of the ground wire coupling portion 81b of the ground terminal 81 that protrudes to the side larger than the ground mounting boss 41. It is necessary to set the position P4 that is separated by the distance L.

  Therefore, in the present embodiment, in the direction parallel to the front surface of the substrate 25, the distance between the portion of the ground terminal 81 and the energized portion of the substrate 25 is the distance between the portion of the conventional ground terminal 81 and the energized portion of the substrate 25. Compared to

  Thus, since the ground terminal 81 is attached to the front surface portion 35 of the radiator 22 from the front surface side of the attachment base portion 63 of the lens holder 27 via the attachment base portion 63, the ground terminal 81 and the energized portion of the substrate 25 are The substrate 25 can be miniaturized while ensuring insulation, and the lighting device 11 can be miniaturized.

  In particular, the surrounding portion 92 of the ground terminal storage portion 91 provided on the mounting base 63 of the lens holder 27 surrounds the ground terminal 81, and the interposed portion 93 of the ground terminal storage portion 91 is interposed between the ground terminal 81 and the substrate 25. Therefore, the insulation of the ground terminal 81 can be reliably ensured.

  The ground terminal 81 connected and fixed to the ground mounting boss 41 does not come into contact with the interposition part 93 and has only a ground function to be connected to the radiator 22 and has a mounting function for the substrate 25 and the lens holder 27. Not done. This is based on the standard that the earth function should not be combined with other functions.

11 Lighting equipment
22 radiator
24 LEDs as semiconductor light emitting devices
25 substrate
26 Lens
27 Lens holder
38 Screws as metal parts
38a Shaft
38b head
41 Ground mounting boss as ground mounting
63 Mounting base
64 Holder
66 Screw mounting part as metal part mounting part
69 Box
70 Interposition
81 Earth terminal as a metal part
91 Earth terminal housing as metal part mounting
92 Box
93 Interposition

Claims (4)

A substrate on which a wiring layer is formed and a semiconductor light emitting element is mounted on the wiring layer;
A heat sink to which the rear surface of the substrate is attached;
A lens for controlling light from the semiconductor light emitting device;
An insulative lens holder provided with a holder portion for holding the lens and provided with an attachment base portion attached to the heat sink via a substrate;
A metal part that is attached to the radiator via the attachment base from the front side of the attachment base of the lens holder;
An illumination device comprising: The metal base mounting portion having a surrounding portion surrounding the periphery of the metal component and an interposition portion interposed between the metal component and the substrate is provided on the mounting base portion of the lens holder. The lighting device described. The metal part is a screw having a shaft portion and a head portion, the shaft portion of the screw passes through the mounting base portion of the lens holder and is attached to the radiator, and the head portion of the screw contacts the front side of the mounting base portion of the lens holder. The lighting device according to claim 1, wherein the lighting device is arranged in contact with each other. The radiator is made of metal, and the front surface is provided with a ground mounting portion that protrudes from the front surface of the mounting base through the mounting base of the substrate and the lens holder.
The lighting device according to claim 1, wherein the metal part is a ground terminal attached to a ground attachment portion protruding from a front surface of the attachment base portion of the lens holder.

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