JP5732612B2 - LED unit and lighting apparatus using the same - Google Patents

Description

  The present invention relates to an LED unit and a lighting fixture using the LED unit.

  Conventionally, the lighting fixture provided with the LED unit is proposed (for example, patent documents 1, 2).

  Patent Document 1 discloses an LED unit 107 including an LED substrate 170, a plurality of LEDs 171, a heat conductive sheet 172, and a lens 173 as shown in FIG. 19. The LED unit 107 further includes packings 174 and 174, spacers 175 and 175, and mounting screws 176 and 176. The lens 173 includes a protrusion 732 that protrudes outward from a part of the upper end of the cylindrical portion 731, and an attachment hole 735 into which the attachment screw 176 is inserted is provided in the protrusion 732. In addition, the bottom 730 of the lens 173 is provided with a plurality of bosses (not shown) that fit into the plurality of fitting holes (not shown) of the LED substrate 170. Patent Document 1 describes that a printed circuit board is used as the LED substrate 170. Patent Document 1 describes using, as the heat conductive sheet 172, a silicon rubber product having excellent heat conductivity (for example, a cercon sheet manufactured by Fuji Polymer Industries Co., Ltd.).

  In Patent Document 1, as shown in FIG. 20, the lighting unit 105, the power supply terminal block 106, the above-described LED unit 107, the lighting unit 105, the power supply terminal block 106, and the LED unit 107 are attached. An electrical component unit 103 having a disk-shaped mounting plate 108 is disclosed. The lighting unit 105 is connected to a power source (not shown) via a power terminal block 106. This lighting unit 105 performs lighting control of the LED 171. The mounting plate 108 is made of a metal having high thermal conductivity such as aluminum.

  Further, in Patent Document 1, as shown in FIG. 21, the main body 101 fixed to the ceiling plate 200 and the mounting plate 108 of the electric component unit 103 are screwed and fixed using mounting screws 182 and 182 to the main body 101. A lighting fixture is disclosed that includes a mounting bracket 102 that is mounted and a cylindrical cover 104 that houses an electrical component unit 103.

  In this lighting fixture, heat generated from the LED 171 and conducted from the LED unit 107 to the mounting plate 108 is also conducted to the main body 101 via the mounting bracket 102 and radiated to the outside, so that heat dissipation can be improved. It becomes.

  Further, in Patent Document 2, as shown in FIG. 22, a board 208 to which two LED modules 208A and 208A are attached, a mounting base 204 to which the board 208 is attached to the top surface 204a, and a box-shaped instrument. A lighting fixture including a main body 205 and a cover 206 attached to the fixture main body 205 so as to be integrated with the frame body 218 is disclosed. Here, the instrument main body 205 is formed to have a rectangular base 214 having a predetermined thickness (for example, 3 to 8 mm) on the bottom surface 205b.

  Six light emitting diodes 202 are mounted on each of the LED modules 208A and 208A. Each of the LED modules 208 </ b> A and 208 </ b> A is attached to the substrate 208 with screws 209. Patent Document 2 describes that the mounting base 204 and the instrument main body 205 are formed using a metal having good thermal conductivity such as aluminum, copper, and stainless steel (SUS), or a ceramic having good thermal conductivity. . Patent Document 2 describes that the cover 206 is formed of tempered glass.

JP 2006-172893 A JP 2008-84783 A

  In the electric component unit 103 disclosed in Patent Document 1, a protrusion 732 protrudes outward from the cylindrical portion 731 of the lens 173 in the LED unit 107, and an attachment screw 176 is inserted into the protrusion 732. Since the hole 735 is provided, it is difficult to downsize (reduce the diameter) of the LED unit 107 and the electrical component unit 103, and it is difficult to downsize the lighting fixture.

  Further, in the above-described electrical component unit 103, the planar size of the thermal conductive sheet 172 is the same as the planar size of the LED unit 107, and the cost of the thermal conductive sheet 172 is high. As a result, the LED unit 107, electrical component The cost of the unit 103 and the lighting fixture is increased. The LED unit 107 described above includes a heat conductive sheet 172, packings 174 and 174, spacers 175 and 175, mounting screws 176 and 176, etc. It may be desirable to include a member such as mounting plate 108 that is coupled by mounting screws 176 and 176.

  22, the light emitting diode 202, the LED modules 208A and 208A, the six light emitting diodes 202 mounted on each of the LED modules 208A and 208A, the substrate 208, the mounting base 204, and the like. If it is considered that the LED unit is configured, the LED unit has a rectangular shape. In this LED unit, since the LED modules 208A and 208A on which the light emitting diode 202 is mounted are attached to the substrate 208 with screws 209, stress is applied to the light emitting diode 202 due to the screws 209, and the surface mounting type There is a concern that a crack occurs in a joint portion between the light emitting diode 202 and the LED modules 208A and 208A and reliability (connection reliability) is lowered, and there is a concern that light emission characteristics of the light emitting diode 202 are changed.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide an LED unit that can be reduced in size and cost and improved in reliability, and a lighting apparatus using the LED unit. There is.

  The LED unit of the present invention includes a disk-shaped base, a heat conductive sheet that is disposed on one surface side of the base so as to overlap the base, and has electrical insulation and heat conductivity, and an LED chip on one surface side of the mounting substrate. A light emitting device using a light emitting device and a terminal portion for supplying power to the light emitting portion, the light emitting device arranged so that the other surface of the mounting substrate is in contact with the thermal conductive sheet, and light emitted from the light emitting device A holder that has a window hole for taking out the light source and is disposed on the side opposite to the base side in the light emitting device, and holds the mounting substrate between the base and a screw insertion hole provided in the holder And an assembly screw for coupling the holder and the base, and light emitted from the light emitting device, disposed on the opposite side of the holder from the base side and attached to the base The mounting board has a rectangular planar shape, a dimension in the longitudinal direction is set smaller than an outer diameter dimension of the base, and the thermal conductive sheet is smaller than the base. The assembly screw is small, and is separated from the mounting substrate in the lateral direction on both sides of the mounting substrate in the lateral direction.

  In this LED unit, it is preferable that the heat conductive sheet has a shape that does not overlap a projection region of the base of the screw insertion hole on the one surface side.

  In this LED unit, it is preferable that a lead-out portion that can lead out the electric wire connected to the terminal portion to the outside is formed on the peripheral portion of the base.

  The lighting fixture of the present invention includes the LED unit and a fixture main body to which the LED unit is attached.

  In the LED unit of the present invention, it is possible to reduce the size and cost and improve the reliability.

  In the lighting fixture of the present invention, it is possible to reduce the size and cost of the LED unit attached to the fixture body and to improve the reliability.

FIG. 3 is an exploded perspective view of the LED unit according to the first embodiment. The LED unit same as the above is shown, and (a) and (b) are perspective views in a state where the lead-out directions of the electric wires are different. The LED unit same as the above is shown, (a) is a plan view, (b) is a side view, and (c) is a bottom view. The LED unit same as the above is shown, in which (a) is a cross-sectional view taken along the line A-A 'of FIG. 3 (a), and (b) is a cross-sectional view corresponding to the B-B' cross section of the FIG. It is principal part explanatory drawing of an LED unit same as the above. It is a principal part perspective view of a LED unit same as the above. It is explanatory drawing of the assembly process of an LED unit same as the above. It is explanatory drawing of the assembly process of an LED unit same as the above. It is explanatory drawing of the assembly process of an LED unit same as the above. It is a schematic sectional drawing of a lighting fixture same as the above. It is a schematic sectional drawing of the other structural example of a lighting fixture same as the above. It is a schematic sectional drawing of the other structural example of a lighting fixture same as the above. It is a schematic sectional drawing of the other structural example of a lighting fixture same as the above. It is a schematic sectional drawing of the other structural example of a lighting fixture same as the above. It is a schematic sectional drawing of the other structural example of a lighting fixture same as the above. It is a disassembled perspective view of the LED unit of Embodiment 2. The LED unit same as the above is shown, (a) is a plan view, (b) is a side view, (c) is a longitudinal sectional view, and (d) is a transverse sectional view of (a). It is a perspective view of a LED unit same as the above. It is a disassembled side view of the LED unit of a prior art example. It is a side view of the electrical component unit of a prior art example. The lighting fixture of a prior art example is shown, (a) is sectional drawing, (b) is a top view. The other LED lighting fixture of a prior art example is shown, (a) is a schematic top view, (b) is a schematic cross-sectional view.

(Embodiment 1)
Hereinafter, the LED unit of the present embodiment will be described with reference to FIGS.

  The LED unit 10 according to this embodiment includes a disk-shaped base 1, a heat conductive sheet 9 disposed on the base 1 on one surface side of the base 1, and the base 1 side of the heat conductive sheet 9 opposite to the base 1 side. And the light emitting device 3 arranged so as to be in contact with the heat conductive sheet 9 on the side. Here, the light emitting device 3 is provided with a light emitting unit 3a using an LED chip (not shown) on one surface side of the mounting substrate 3b and terminal portions 3c and 3c for feeding power to the light emitting unit 3a. It arrange | positions so that the other surface of 3b may contact | connect the heat conductive sheet 9. FIG.

  In addition, the LED unit 10 is disposed on the side opposite to the base 1 side in the light emitting device 3, and the holder 2 that holds the mounting substrate 3 b between the LED unit 10 and the base 1 side in the holder 2 is disposed on the side opposite to the base 1 side. A cover 20 attached to the base 1 and a cover pressing member 21 are provided. Here, the holder 2 has a window hole 2 a for extracting light emitted from the light emitting device 3. In addition, the cover 20 has a function of transmitting light emitted from the light emitting device 3. Further, the LED unit 10 includes two assembly screws 23 d and 23 d that are inserted into the screw insertion holes 2 d and 2 d provided in the holder 2 and couple the holder 2 and the base 1. Further, the LED unit 10 described above includes power supply wires (lead wires) 4 and 4 that are electrically connected to the terminal portions 3c and 3c of the light emitting device 3, respectively.

  The base 1 is made of aluminum which is a material having a higher thermal conductivity than that of the resin. The material of the base 1 is preferably a material having a higher thermal conductivity than the resin, and for example, a metal such as aluminum, copper, or stainless steel, or a ceramic can be used.

  A screw insertion hole 1b through which a mounting screw (not shown) for detachably attaching the LED unit 10 to the fixture body 11 (see FIG. 10) of the lighting fixture 12 (see FIG. 10) is inserted in the peripheral portion of the base 1. Is penetrated. Two screw insertion holes 1 b are provided in the base 1, and are provided apart from each other in the circumferential direction of the base 1. The periphery of each screw insertion hole 1 b in the base 1 is recessed from the one surface of the base 1. The mounting screw described above is inserted into the screw insertion hole 1 b from the one surface side of the base 1.

  The light emitting device 3 includes a light emitting unit 3a having a plurality of LED chips and a mounting substrate 3b on which the light emitting unit 3a is mounted. Here, the plurality of LED chips are connected in series, but may be connected in parallel or may be connected in series and parallel.

  The light emitting unit 3a includes the plurality of LED chips described above and a sealing unit 3d that covers the plurality of LED chips. In the light emitting unit 3a, the LED chip is composed of a blue LED chip, and a phosphor made of a yellow phosphor that emits broad yellow light when excited by blue light emitted from the blue LED chip is a sealing unit 3d. It is mixed with a light-transmitting sealing material (for example, silicone resin, epoxy resin, glass, etc.) to constitute a white LED that obtains white light. In addition, the fluorescent substance of the light emission part 3a is not restricted to a yellow fluorescent substance, For example, you may use a red fluorescent substance and a green fluorescent substance. The light emitting unit 3a may constitute a white LED that obtains white light by combining a violet to near-ultraviolet LED chip with a red phosphor, a green phosphor, and a blue phosphor. Further, the light emitting unit 3a may constitute a white LED that obtains white light by combining a red LED chip, a green LED chip, and a blue LED chip.

  The mounting substrate 3b is formed by using, for example, a metal base printed wiring board, and the above-described terminal portions 3c and 3c electrically connected to the light emitting portion 3a are formed. Each terminal part 3c, 3c is comprised by the conductor pattern. The mounting substrate 3b uses a metal-based printed wiring board, but is not limited to this. For example, a conductor that defines the connection between the terminal portions 3c and 3c and the terminal portions 3c and 3c and the LED chip on the organic insulating substrate. You may use what formed the pattern etc., or what formed the conductor pattern etc. which prescribe | regulate the connection relation of terminal part 3c, 3c and terminal part 3c, 3c, and an LED chip in an inorganic type insulating substrate. As a material for the organic insulating substrate, for example, a glass epoxy resin, a polyimide resin, a phenol resin, a liquid crystal polymer, or the like can be used. As the material for the inorganic insulating substrate, for example, alumina, aluminum nitride, silicon carbide, or the like can be used. Moreover, the electric wires 4 and 4 are electrically connected to each terminal part 3c and 3c via the junction part (not shown) which consists of solder. Here, one electric wire 4 is connected to the terminal portion 3c (left terminal portion 3c in FIG. 1) connected to the plus side of the light emitting portion 3a, and the other electric wire 4 is connected to the minus side of the light emitting portion 3a. It is connected to the terminal portion 3c (the right terminal portion 3c in FIG. 1). In addition, the mounting board 3b has “+” and “−” indicating polarity in the vicinity of the terminal portions 3c and 3c in order to prevent erroneous connection of the electric wires 4. A reflective layer (not shown) made of a white resist layer (resin layer) covering the light emitting portion 3a and the portions other than the terminal portions 3c and 3c is formed on the one surface side of the mounting substrate 3b. Thus, it is possible to suppress the light emitted from the light emitting unit 3a from being absorbed by the mounting substrate 3b.

By the way, the mounting substrate 3b has a rectangular planar shape, and the dimension in the longitudinal direction is set smaller than the outer diameter dimension of the base 1 having a circular planar shape. The mounting substrate 3b is provided with terminal portions 3c and 3c at both ends in the longitudinal direction. Further, the terminal portions 3c and 3c are shifted in the short-side direction of the mounting substrate 3b . That is, one terminal portion 3c is located on one end side in the short direction of the mounting substrate 3b, while the other terminal portion 3c is located on the other end side in the short direction of the mounting substrate 3b. Yes. Thereby, the LED unit 10 can suppress the mounting substrate 3b from warping due to stress or the like applied to each joint portion (not shown) between the terminal portions 3c, 3c and the electric wires 4, 4. Become.

  Moreover, the above-mentioned base 1 is formed with a circular recess 1e for accommodating and arranging a part of each of the electric wires 4 and 4 electrically connected to the light emitting device 3 on the one surface side. A projecting portion 1f projects from the center of the inner bottom surface of the recess 1e. In the LED unit 10, the above-described heat conductive sheet (heat dissipating sheet) 9 is interposed between the front end surface 1 fa of the projecting portion 1 f and the other surface of the mounting substrate 3 b. Here, the heat conductive sheet 9 has electrical insulation and heat conductivity. The material of the heat conductive sheet 9 is preferably a material having high electrical insulation and high thermal conductivity.

  The planar shapes of the projecting portion 1 f and the heat conductive sheet 9 are each formed in a rectangular shape larger than the mounting substrate 3 b of the light emitting device 3. In the LED unit 10 of the present embodiment, the center of the protruding portion 1 f is located at the center of the base 1, and the center of the protruding portion 1 f and the center of the light emitting device 3 are aligned. In short, the LED unit 10 has the optical axis of the light emitting device 3 aligned with the center line along the thickness direction of the base 1.

  Further, the height dimension of the projecting portion 1f is set so that the sum of the height dimension of the projecting portion 1f and the thickness dimension of the heat conductive sheet 9 is larger than the depth dimension of the recess 1e. Has been. Therefore, the LED unit 10 of the present embodiment can suppress the light emitted from the light emitting device 3 from being reflected or absorbed by the inner surface of the recess 1e of the base 1.

As the heat conductive sheet 9, a sheet of silicone gel having electrical insulation and heat conductivity is used. The silicone gel sheet used as the heat conductive sheet 9 is preferably soft. For example, Sarcon (registered trademark) can be used as this type of silicone gel sheet. On the other hand, if the recess 1q is provided in the peripheral portion of the tip surface 1fa of the projecting portion 1f, the heat conductive sheet 9 is placed on the tip surface 1fa of the projecting portion 1f when the LED unit 10 is assembled. When placed, a part of the heat conductive sheet 9 can enter the recess 1q. Thus, the LED unit 10 is interposed between the protruding portion 1f and the light emitting device 3 before the mounting substrate 3b and the heat conductive sheet 9 of the light emitting device 3 are sandwiched between the holder 2 and the base 1 at the time of assembly. position shift in the transverse direction of the thermal conduction property sheet over preparative 9 can be prevented. In addition, although the recessed part 1q is formed in the linear form in the intermediate part of the length direction of each of 4 sides of the rectangular-shaped protrusion part 1f, the shape and arrangement | positioning of the recessed part 1q are not specifically limited. .

  The material of the heat conductive sheet 9 is not limited to silicone gel, and may be, for example, an elastomer as long as it has electrical insulation and heat conductivity.

  The LED unit 10 of the present embodiment can efficiently dissipate heat generated in the light emitting device 3 to the base 1 through the heat conductive sheet 9. Further, in the LED unit 10 of the present embodiment, the base 1 is formed of a material having a higher thermal conductivity than that of the resin, so that the heat generated in the light emitting device 3 is passed through the thermal conductive sheet 9 and the base 1. It becomes possible to radiate heat toward the main body 11 (see FIG. 10).

  The holder 2 includes a pressing plate portion 2e that holds the mounting substrate 3b of the light emitting device 3 between the projecting portion 1f and a peripheral wall that extends rearward (base 1 side) from the periphery of the pressing plate portion 2e. Part 2f. The holder 2 has a presser plate portion 2e formed in a disc shape, and a window hole 2a for exposing the light emitting portion 3a of the light emitting device 3 is formed at the center of the presser plate portion 2e. The window hole 2a has a circular opening shape. The inner diameter of the window hole 2a is set larger than the outer diameter of the circular light emitting portion 3a. The holder 2 is made of a white synthetic resin.

  Further, on the inner bottom surface of the recess 1e in the base 1, one columnar boss portion 1r is protruded one by one on both sides of the projecting portion 1f in the short direction. Each boss 1r is formed with a screw hole 1d into which the above-described assembly screw 23d is screwed. Therefore, the LED unit 10 according to the present embodiment can reduce the inner diameter of the recess 1e as compared with the case where the boss portions 1r are arranged on both sides in the longitudinal direction of the projecting portion 1f. 2 and the base 1 can be downsized.

  In addition, the holder 2 has holes 2b and 2b formed in portions corresponding to the electric wires 4 and 4 in the peripheral portion of the pressing plate portion 2e. The holes 2b and 2b are provided in order to prevent the electric wires 4 and 4 electrically connected to the terminal portions 3c and 3c of the light emitting device 3 from interfering with the holding plate portion 2e. Each hole 2b, 2b is formed to communicate with the window hole 2a. Therefore, the LED unit 10 can suppress an increase in the distance between the holding plate portion 2e of the holder 2 and the mounting substrate 3b by forming the holes 2b and 2b, and is emitted from the light emitting portion 3a. It is possible to suppress light from being reflected by the surface on the mounting board 3b side of the pressing plate portion 2e.

  In addition, the holder 2 is provided with bosses 2g (see FIG. 4B) protruding from the portions corresponding to the screw holes 1d of the base 1 to the base 1 side in the holding plate 2e. A screw insertion hole 2d for inserting the screw 23d is formed so as to penetrate the boss portion 2g. Here, the opening shape of each screw insertion hole 2d is circular. Further, the holder 2 has a first inner diameter on the opposite side to the base 1 side of the presser plate portion 2e for each screw insertion hole 2d slightly larger than an outer diameter of the head 23da of the assembly screw 23d, and the base 1 The second inner diameter on the side is made smaller than the outer diameter of the head 23da of the assembly screw 23d. Therefore, in the LED unit 10 of this embodiment, when the assembly screw 23d is screwed into the screw hole 1d of the base 1, it is possible to suppress the assembly screw 23d from being excessively screwed, and the holder 2 is deformed. In addition, it is possible to suppress excessive stress from being applied to the light emitting device 3. Further, in the LED unit 10 of the present embodiment, the tip end portion of the boss portion 1r of the base 1 is inserted at the second inner diameter in the screw insertion hole 2d of the boss portion 2g of the holder 2. The base 1 is pushed into the base 1 side of the holder 2 by a rib 1hc, which will be described later, formed integrally with one boss 1r (the right boss 1r in FIGS. 1 and 4B). Is limited. Also by these, the LED unit 10 can suppress the assembly screw 23d from being excessively screwed into the screw hole 1d of the boss 1r of the base 1.

  Further, the LED unit 10 of the present embodiment can absorb and relieve the stress applied to the light emitting device 3 by the heat conductive sheet 9 when the assembly screw 23d is screwed into the screw hole 1d. In addition, it is possible to suppress unnecessary stress from being applied to the light emitting device 3.

  In the LED unit 10 of this embodiment, it is preferable that the shape of the holding plate portion 2e of the holder 2 is a circular shape, but the shape is not limited to this, and for example, a polygonal shape (for example, a regular hexagonal shape, a regular octagonal shape, etc.) It may be oval.

  In addition, a lead-out portion 1 c for leading out the electric wires 4 and 4 electrically connected to the light emitting device 3 to the outside of the LED unit 10 is provided on the peripheral portion of the base 1.

  The lead-out part 1 c is a notch formed in the peripheral part of the base 1, and can change the direction in which the electric wires 4, 4 are led out of the LED unit 10.

In the lead-out part 1 c, the one surface, the other surface and the side surface of the base 1 are open at the periphery of the base 1. However, the above-described cover pressing member 21 is disposed on the one surface side of the base 1 in the peripheral portion of the base 1. Therefore, the LED unit 10 has a direction in which the electric wires 4 and 4 are led out to the outside of the LED unit 10 through the lead-out portion 1c in a predetermined direction intersecting the other surface of the base 1 and the other surface of the base 1. It is possible to change between them (see FIG. 5). Further, as shown in FIG. 3, when the LED unit 10 leads the wires 4 and 4 from the lead-out portion 1 c in a direction perpendicular to the other surface of the base 1, the wires 4 and 4 are connected to the outer circumference of the base 1. Also, the lead-out portion 1c is formed so as to be disposed inside. Therefore, the LED unit 10 suppresses the electric wires 4 and 4 from being seen from the front side of the LED unit 10 by deriving the electric wires 4 and 4 from the lead-out portion 1c in a direction orthogonal to the other surface of the base 1. Is possible. In this case, for example, the instrument body 11 (see FIG. 10) to which the LED unit 10 is attached has a bottomed tapered cylindrical shape, and an insertion hole (not shown) through which the connector 4a passes through the bottom 11c of the instrument body 11 is provided. If formed, the difference between the diameter of the bottom 11c of the fixture body 11 and the diameter (outer diameter) of the base 1 of the LED unit 10 can be reduced, and the lighting fixture 12 can be downsized. It becomes.

  Since the LED unit 10 can lead out the electric wires 4 and 4 from the lead-out part 1c to the other surface side of the base 1, and can also lead out to the side, the power unit 15 for supplying power to the LED unit 10 It becomes possible to increase the degree of freedom of the relative positional relationship with (see FIG. 10). Thereby, since the LED unit 10 of this embodiment can raise the freedom degree of a relative positional relationship with the power supply unit 15, it can use the instrument main body 11 (for example, refer FIGS. 10-15) of various forms. Can be attached.

  By the way, ribs 1ha and 1ha are provided on the inner bottom surface of the recess 1e of the base 1 so as to sandwich each of the electric wires 4 and 4 with the inner peripheral surface of the recess 1e in the vicinity of the lead-out portion 1c. Yes. The two ribs 1ha and 1ha are connected to each other through a connecting piece 1he protruding from the inner bottom surface of the recess 1e of the base 1. Further, on the inner bottom surface of the recess 1e of the base 1, two ribs 1hd and 1hd projecting near the boundary between the inner peripheral surface of the recess 1e and the inner peripheral surface 1g of the lead-out portion 1c (FIG. 7 (c) ) And FIG. 8 (a)), the ribs 1hc described above are provided so as to hold the electric wires 4 and 4 therebetween.

  Therefore, the LED unit 10 according to the present embodiment holds the electric wires 4 and 4 electrically connected to the light emitting device 3 in the base 1, so that the tension of the electric wires 4 and 4 is not added without adding another component. It is possible to provide a stop function. In other words, the LED unit 10 described above does not require a separate part for reducing the tension acting on the electric wires 4 and 4, and can provide a tension stopping function for the electric wires 4 and 4 at a low cost. Moreover, since this LED unit 10 can reduce the tension | tensile_strength which acts on the electric wires 4 and 4, in the junction part (not shown) of each electric wire 4 and 4 and each terminal part 3c of the light-emitting device 3, 3c. It is possible to prevent disconnection due to stress.

  Further, in the LED unit 10, a clamping portion 2 c that clamps the electric wires 4 and 4 is extended from the peripheral wall portion 2 f of the holder 2 to the base 1 in the vicinity of the lead-out portion 1 c of the base 1. That is, the LED unit 10 of the present embodiment can hold the electric wires 4 and 4 electrically connected to the light emitting device 3 between the holding portion 2 c of the holder 2 and the base 1. Therefore, the LED unit 10 holds the electric wires 4 and 4 electrically connected to the light emitting device 3 between the holding portion 2c of the holder 2 and the base 1 without adding another component. , 4 can be provided with a tension stopper function.

  The base 1 has a chamfered portion 1k (see FIG. 5) between the inner bottom surface of the recess 1e of the base 1 and the inner side surface 1g of the lead-out portion 1c of the base 1. Therefore, since the chamfered portion 1k is formed in the LED unit 10 of this embodiment, it is possible to reduce the stress applied to each electric wire 4 when each electric wire 4 is bent to the other surface side of the base 1. Become. Moreover, since the LED unit 10 can reduce the stress applied to each electric wire 4 when each electric wire 4 is bent to the other surface side of the base 1, it is possible to prevent the electric wires 4 from being disconnected. Become.

  The cover 20 is made of a translucent material (for example, silicone resin, acrylic resin, glass, etc.). The cover 20 has a main body portion 20a that is open on the base 1 side and covers the light emitting device 3 and the like inside the outer peripheral line of the base 1, and extends outward from the opening edge of the main body portion 20a. And a flange 20b for attaching to the base 1. The main body 20a has a cylindrical portion 20aa formed in a cylindrical shape, and a light emitting portion that is formed in a circular shape that covers one end side far from the base 1 in the cylindrical portion 20aa and emits light from the light emitting device 3 side to the outside. 20ab, and has a bottomed cylindrical shape as a whole. The main body portion 20a is formed so that the cylindrical portion 20aa and the light emitting portion 20ab are smoothly continuous. Further, a lens may be formed on a part or all of the light emitting part 20ab of the main body part 20a. This lens is not particularly limited, and may be a plano-convex lens, a biconvex lens, a plano-concave lens, a biconcave lens, a Fresnel lens, or the like. Moreover, the shape of the main-body part 20a is not limited to a bottomed cylindrical shape, For example, a dome shape may be sufficient.

  The cover 20 is exposed to the holding plate 2e side of the holder 2 by the assembly screws 23d and 23d inserted into the screw insertion holes 2d and 2d of the holder 2 and the holes 2b and 2b of the holder 2, respectively. An annular (for example, annular) inner cover (decorative cover) 40 that covers the electric wires 4 and 4 is disposed.

  The inner cover 40 is made of a non-translucent material (for example, white opaque resin, specifically, PBT) and is housed and disposed in the main body portion 20 a of the cover 20. The inner cover 40 has projections 40b for positioning with respect to the cover 20 extending outward from the outer peripheral edge. Here, the inner cover 40 includes three protrusions 40 b, and these three protrusions 40 b are arranged at substantially equal intervals in the circumferential direction of the inner cover 40. On the other hand, on the inner peripheral surface of the cylindrical portion 20aa of the cover 20, a groove 20h (see FIG. 4B) for positioning each of the protrusions 40b from the other end near the base 1 in the cylindrical portion 20aa. ) Is formed. The cylindrical portion 20aa has a cylindrical shape (tapered cylindrical shape) whose inner diameter gradually decreases from the other end to the one end, and each groove 20h is formed from the other end to the middle of the cylindrical portion 20aa. . Further, the number of protrusions 40b is not particularly limited, but in order to stably position the cover 20 with respect to the cover 20, a plurality of protrusions 40b are preferable and three or more are preferable.

  In addition, the circular opening window 40a of the inner cover 40 has a uniform opening area in the vicinity of the light emitting device 3 in the optical axis direction of the light emitting device 3, but otherwise the opening area increases as the distance from the light emitting device 3 increases. The shape gradually increases. Therefore, the LED unit 10 causes the main body portion 20a to emit a part of light emitted from the light emitting portion 3a of the light emitting device 3 in the direction toward the cylindrical portion 20aa of the main body portion 20a by the inner side surface of the opening window 40a of the inner cover 40. It is possible to reflect toward the light emitting part 20ab. In other words, the inner cover 40 has a function as a reflector that controls the light distribution of the light emitted from the light emitting device 3. The inner cover 40 is in contact with the one surface of the mounting substrate 3b at a small diameter portion 40d having an inner diameter that is the smallest. Further, the inner cover 40 is formed continuously with the small diameter portion 40d, and the tapered portion 40e whose inner diameter gradually increases as the distance from the small diameter portion 40d in the thickness direction of the mounting substrate 3b has a function as the above-described reflector. doing. Further, the inner cover 40 has a contact portion 40 f in contact with the peripheral portion of the holder 2 on the peripheral portion of the inner cover 40. In the inner cover 40, each of the above-described protrusions 40 b is held between the cover 20 and the holder 2.

  Further, the inner cover 40 has a cylindrical rib 40c inserted into each of the screw insertion holes 2d of the holder 2 on the surface on the base 1 side in the intermediate portion 40g between the tapered portion 40e and the contact portion 40f (see FIG. 4 (b)) is projected. Therefore, the LED unit 10 is also provided with the rib 40c, so that loosening of the assembly screw 23d is suppressed.

  Since the LED unit 10 of the present embodiment includes the inner cover 40, it is possible to prevent the assembly screws 23 d and 23 d and the electric wires 4 and 4 from being seen through the cover 20, thereby improving the appearance design. It becomes possible to raise.

The cover 20 has an annular rib (protrusion) 20e (see FIG. 4) protruding from the surface of the flange portion 20b facing the base 1 on the base 1 side. Here, on the one surface side of the base 1, an annular groove 1 t that can accommodate the rib 20 e is formed at a portion corresponding to the rib 20 e of the cover 20. The groove portion 1t communicates with the lead-out portion 1c. In the LED unit 10, the width dimension of the annular groove 1t is set larger than the width dimension of the annular rib 20e. In the LED unit 10, the space surrounded by the inner surface of the groove portion 1t, the flange portion 20b of the cover 20 and the rib 20e is a seal portion (for example, a silicone resin) made of a sealing material for hermetic sealing (for example, silicone resin). (Not shown). Therefore, the LED unit 10 of the present embodiment can suppress intrusion of moisture, impurities, and the like into the LED unit 10.

  The cover pressing member 21 is made of a non-translucent material (for example, a metal such as aluminum or a white opaque resin), and is emitted from the light emitting device 3 and emitted from the main body 20a of the cover 20. It is formed in a flat annular shape so as not to disturb as much as possible. Further, the cover pressing member 21 holds the flange portion 20 b of the cover 20 between the base 1 and the cover pressing member 21. In addition, although the length dimension of the derivation | leading-out part 1c along one radial direction which passes along the derivation | leading-out part 1c in the base 1 is set to a dimension smaller than the width dimension of the cover pressing member 21, it sets to the same dimension. Alternatively, it may be set to a large size.

  Further, when the sealing material filled in the groove 1t of the base 1 overflows in the peripheral portion of the cover pressing member 21 in the portion corresponding to the lead-out portion 1c of the base 1 when the LED unit 10 is assembled, the overflow seal A recess 21a (see FIG. 4B) capable of storing a stopper is formed. Here, in the outer peripheral portion of the flange portion 20 b of the cover 20, a notch portion for guiding the overflowing sealing material to the recess 21 a of the cover pressing member 21 in a portion corresponding to the recess 21 a of the cover pressing member 21. 20f is formed.

  Further, a plurality (four in this case) of cylindrical boss portions 21 c projecting toward the base 1 are provided on the surface of the cover pressing member 21 facing the base 1. Here, a semicircular cutout portion 20 d that passes through each boss portion 21 c is formed at a portion corresponding to each boss portion 21 c of the cover pressing member 21 on the outer peripheral portion of the flange portion 20 b of the cover 20. . In addition, a through hole 1 a that penetrates the boss portion 21 c is formed in the peripheral portion of the base 1 at a portion corresponding to each boss portion 21 c of the cover pressing member 21. Here, when attaching the above-described cover 20 to the base 1, the boss portions 21 c of the cover pressing member 21 are inserted into the through holes 1 a of the base 1, and then the boss portions 21 c from the other surface side of the base 1. The cover 20 is attached to the base 1 by plastically deforming the front end of the base plate by laser irradiation or the like so as to be wider than the through hole 1 a of the base 1. In short, the boss portion 21c finally has a mushroom-like shape. Here, on the other surface side of the base 1, a head portion 21 ca (see FIGS. 3B and 3C) of a mushroom-like boss portion 21 c is accommodated and disposed in a portion corresponding to each through hole 1 a. A storage portion 1j is formed in communication with the through hole 1a. The depth dimension of each storage portion 1j is set so that the head portion 21ca of the boss portion 21c does not protrude from the plane including the other surface of the base 1.

  The LED unit 10 of the present embodiment can prevent stress from being applied to the cover 20 by sandwiching the flange portion 20b of the cover 20 between the base 1 and the cover pressing member 21. In addition, since the LED unit 10 has the cover pressing member 21 attached to the base 1 without using screws, there is no concern about loosening of screws. Further, the LED unit 10 has the cover pressing member 21 formed in a flat annular shape. Therefore, when the LED unit 10 is attached to the instrument body 11 (see FIG. 10) and the LED unit 10 is turned on, the cover is pressed. The number of elements that hinder the desired light distribution and uniformity of the light emitted from the 20 main body portions 20a is reduced. The method for attaching the cover 20 to the base 1 is not particularly limited, and for example, the cover 20 may be attached to the base 1 using an assembly screw or the like.

  In addition, an attachment screw (not shown) is attached to the outer peripheral portion of the cover pressing member 21 at a portion corresponding to each screw insertion hole 1b in the peripheral portion of the base 1 from the side opposite to the base 1 side of the cover pressing member 21. A semicircular cutout portion 21b to be inserted is formed. Further, on the outer peripheral portion of the flange portion 20 b of the cover 20, the mounting screw is attached to the cover pressing member 21 at a portion corresponding to each screw insertion hole 1 b of the peripheral portion of the base 1 and each notch portion 21 b of the cover pressing member 21. A semicircular cutout 20c is formed to be inserted from the side. Therefore, in the LED unit 10 of the present embodiment, each notch 21 b is formed on the outer periphery of the cover pressing member 21, and each notch 20 c is formed on the outer periphery of the flange 20 b of the cover 20. Therefore, it becomes possible to detachably attach the base 1 to the fixture body 11 (see FIG. 10) of the lighting fixture 12 (see FIG. 10) from the cover 20 side.

  By the way, the LED unit 10 includes one connector 4a in which the other end portions of the electric wires 4 and 4 whose one end portions are connected to the terminal portions 3c and 3c of the light emitting device 3 are connected. For example, as shown in FIG. 10, the connector 4 a can be detachably connected to a connector 14 on the power supply unit 15 side provided at the tip of a power supply line 13 that is electrically connected to the power supply unit 15. Is possible.

  Therefore, since the LED unit 10 of the present embodiment includes the connector 4a to which the other end portions of the electric wires 4 and 4 are connected, connection work when the LED unit 10 is attached to and detached from the instrument body 11 and the like can be easily performed. It can be carried out. Moreover, since this LED unit 10 can attach the base 1 to the fixture main body 11 of the lighting fixture 12 from the cover 20 side so that attachment or detachment is possible, it becomes possible to replace | exchange LED unit 10 easily by a user.

  Below, the assembly process of the above-mentioned LED unit 10 is demonstrated, referring FIGS. 7-9.

  First, the heat conductive sheet 9 is mounted on the one surface side of the base 1 shown in FIG. 7A (see FIG. 7B). Specifically, the heat conductive sheet 9 is placed on the front end surface 1fa of the protruding portion 1f of the base 1. At this time, a part of the heat conductive sheet 9 enters the recess 1q of the tip surface 1fa of the projecting portion 1f. Further, in the LED unit 10 of the present embodiment, the heat conductive sheet 9 is formed in a rectangular shape that is slightly larger than the front end surface 1fa of the projecting part 1f, and the position of the heat conductive sheet 9 is the projecting part 1f. The recess 1q is formed in the vicinity of each of the four sides of the projecting portion 1f so that the recess 1q is exposed when it is deviated from the tolerance in each direction in the longitudinal direction or the lateral direction. Therefore, after placing the heat conductive sheet 9 on the projecting part 1f, for example, by performing visual inspection or visual inspection by an visual inspection device including an imaging device (for example, a CCD camera) and an image processing device, It is possible to perform pass / fail determination. As a result, a part of the heat conductive sheet 9 overlapping the boss part 1r of the base 1, the inner bottom surface of the recess 1e, and the peripheral part of the recess 1e is regarded as a defective product. It becomes possible to place it on the projecting part 1f again, away from the projecting part 1f.

  After the above appearance inspection, the light emitting device 3 is mounted on the heat conductive sheet 9 (see FIG. 7C). At this time, the light emitting device 3 is mounted so that the longitudinal direction of the mounting substrate 3 b is aligned with the longitudinal direction of the heat conductive sheet 9.

  Thereafter, the electric wires 4 and 4 are housed and held in the recesses 1e of the base 1 to hold the tension, and then the electric wires 4 and 4 and the terminal portions 3c and 3c of the mounting board 3b are made of solder. Electrical connection is established by joining (soldering) via a joint (not shown) (see FIG. 8A). In addition, after connecting each electric wire 4 and each terminal part 3c, tension | tensile_strength stopping may be performed by accommodating each electric wire 4 and 4 in the recess 1e of the base 1, and hold | maintaining.

  Next, the holder 2 is put on the base 1 by covering the holder 2 from the one surface side of the base 1 and then screwing the assembly screw 23d inserted into the screw insertion hole 2d into the screw hole 1d of the boss 1r. Fix (see FIG. 8B). Thereby, the mounting substrate 3b and the heat conductive sheet 9 of the light emitting device 3 are sandwiched and held by the holder 2 and the base 1.

  Thereafter, an appropriate amount of uncured sealing material (for example, silicone resin) is injected into the groove 1t of the base 1 by a dispenser or the like. Subsequently, the cover 20 that temporarily holds the inner cover 40 by positioning each protrusion 40b of the inner cover 40 in each groove 20h (see FIG. 4B) on the inner peripheral surface of the cylindrical portion 20aa is attached to the cover 20. Is mounted on the base 1 from the one surface side so that the rib 20e enters the groove 1t (see FIG. 9A). Then, the above-mentioned sealing part is formed by hardening the above-mentioned sealing material. In short, the cover 20 is attached to the base 1. FIG. 8C shows the relative position of the inner cover 40 with respect to the base 1.

After attaching the cover 20 to the base 1 as described above, by inserting the cover pressing member 2 1 a volume scan section 2 1c from the first surface side of the base 1 into the through hole 1a of the base 1, the other surface of the base 1 assembling the LED unit 10 by forming the head 21ca by plastically deformed by irradiation of the tip of the ball scan section 2 1c on the side, such as a laser beam is completed (see FIG. 9 (b)).

  The LED unit 10 of the present embodiment described above includes the base 1, the heat conductive sheet 9, the light emitting device 3, the holder 2, the assembly screw 23d, and the cover 20, and is a plane of the mounting substrate 3b. The shape is rectangular, the dimension of the mounting board 3b in the longitudinal direction is set smaller than the outer diameter dimension of the base 1, the heat conductive sheet 9 is smaller than the base 1, and the assembly screw 23d is short of the mounting board 3b. The both sides of the hand direction are away from the mounting board 3b in the short direction. Thereby, in the LED unit 10 of this embodiment, the screw hole 1d into which the assembly screw 23d is screwed into the empty space where the light emitting device 3 and the heat conductive sheet 9 are not arranged on the one surface side of the disc-shaped base 1 is formed. Since it can be provided, the LED unit 10 can be downsized as compared with the case where the screw holes 1d are provided on both sides in the longitudinal direction of the mounting substrate 3b. Moreover, since the heat conductive sheet 9 is smaller than the base 1 and the planar size of the heat conductive sheet 9 can be reduced, the cost can be reduced. Moreover, since it is not necessary for the LED unit 10 to insert the assembly screw 23d through the mounting substrate 3b, the junction between the terminal portions 3c and 3c of the mounting substrate 3b of the light emitting device 3 and the electric wires 4 and 4, the LED chip, and the above It is possible to improve the reliability (connection reliability) of the joint portion with the conductor pattern. Moreover, since the assembly screw 23d is arrange | positioned at the both sides of the transversal direction of the mounting board 3b, the LED unit 10 has an assembly screw compared with the case where the assembly screw 23d is arrange | positioned at the both sides of the longitudinal direction of the mounting board 3b. The stress applied to the light emitting device 3 due to the tightening of 23d can be reduced. Therefore, in the LED unit 10 of the present embodiment, it is possible to reduce the size and cost and improve the reliability.

  By the way, in the electrical component unit 103 shown in FIG. 20, the lens 173 and the heat conductive sheet 172 are fixed to the mounting plate 108 with the mounting screws 176, so that the heat conductive sheet 172 and the mounting plate 108 are fixed. There is a concern that a gap is generated between the LED 171 and the thermal resistance from the LED 171 to the mounting plate 108 for each of the electrical component units 103, and there is a concern that an increase in light output is limited. There is.

  On the other hand, in the LED unit 10 of the present embodiment, as can be seen from the above description, the heat conductive sheet 9 is in the projection region of the screw insertion hole 2d in the holder 2 on the one surface side of the base 1. The shape does not overlap (in this case, a rectangular shape in which the dimension in the short direction is set so as not to overlap the projection region). Thereby, in LED unit 10 of this embodiment, it becomes possible to suppress that a space | gap generate | occur | produces between the heat conductive sheet 9 and the protrusion part 1f, and thermal resistance increases. Moreover, it becomes possible to suppress the variation in the thermal resistance from the light emitting part 3a to the projecting part 1f for each LED unit 10, and it is possible to increase the light output. As a result, for example, when used by being attached to the fixture main body 11 as shown in FIG. 10, it is possible to suppress variation in the thermal resistance from the light emitting portion 3 a to the fixture main body 11 for each LED unit 10. The output can be increased.

  Further, in the LED unit 10 of the present embodiment, as described above, the lead-out portion 1c that can lead out the wires 4, 4 connected to the terminal portions 3c, 3c to the outside is formed on the peripheral portion of the base 1. Preferably it is. Thereby, the LED unit 10 can lead out the electric wires 4 and 4 from the periphery of the base 1. For this reason, for example, as shown in FIG. 10, it is possible to prevent the electric wires 4 and 4 from entering between the LED unit 10 and the instrument body 11, and the heat generated in the light emitting device 3 of the LED unit 10 can be reduced. It becomes possible to improve the heat dissipation when radiating heat through the instrument body 11. Moreover, in the LED unit 10 of this embodiment, since it is not necessary to insert the assembly screw 23d through the mounting board 3b, there is less restriction on the direction in which the electric wires 4, 4 connected to the terminal portions 3c, 3c of the mounting board 3b are pulled out. When the electric wires 4 and 4 are led out from one lead-out portion 1c of the base 1, the electric wires 4 and 4 can be easily routed.

  Below, the lighting fixture 12 provided with the above-mentioned LED unit 10 is demonstrated, referring FIGS. 10-15.

  The lighting fixture 12 includes the above-described LED unit 10 and a metal fixture body 11 to which the LED unit 10 is detachably attached. In this lighting fixture 12, the fixture body 11 is made of metal, so that heat generated in the light emitting device 3 of the LED unit 10 is transmitted through the heat conductive sheet 9, the base 1, and the fixture body 11 compared to the case of resin. It is possible to dissipate heat efficiently. In addition, although aluminum is employ | adopted as a material of the instrument main body 11, you may employ | adopt metals (for example, copper etc.) other than aluminum. Moreover, the material of the instrument body 11 may be a material other than metal (for example, ceramic).

  The instrument body 11 is configured so that the LED unit 10 can be detachably attached. More specifically, the instrument body 11 is formed with mounting screw holes (not shown) for screwing the mounting screws in portions corresponding to the screw insertion holes 1b in the peripheral portion of the base 1.

  The lighting fixture 12 having the configuration shown in FIG. 10 is, for example, a downlight that is embedded in the ceiling material 17. The fixture body 11 of the lighting fixture 12 includes a bottomed cylindrical body 11a in which the LED unit 10 is housed and disposed, and an outer casing extending outward from the lower end of the body 11a. Part 11b. The instrument body 11 is embedded in an embedding hole 17 a penetrating the ceiling material 17, and the outer flange portion 11 b is attached to the ceiling material 17 in such a manner as to contact the peripheral portion of the embedding hole 17 a on the lower surface of the ceiling material 17. It is attached. In addition, the lighting fixture 12 is attached to the fixture main body 11 with an attachment spring (not shown) that sandwiches the peripheral portion of the embedding hole 17a in the ceiling material 17 between the lighting fixture 12 and the outer casing 11b.

  As for the instrument main body 11, the LED unit 10 is attached to the lower side of the bottom part 11c of the main-body part 11a. The appliance body 11 is provided with a storage portion 11e for storing and arranging the power supply unit 15 on the upper side of the body portion 11a, and the power supply unit 15 is arranged away from the appliance body 11. Therefore, the lighting fixture 12 of this embodiment can suppress the heat generated in the power supply unit 15 from being conducted through the fixture main body 11 to the LED unit 10 side.

  In addition, a lead-out hole (not shown) through which the pair of electric wires 4 and 4 and the connector 4a led out from the base 1 of the LED unit 10 are led out into the housing portion 11e is provided in the bottom portion 11c of the appliance main body 11.

  The lighting fixture 12 having the configuration shown in FIG. 11 is a spotlight in which the fixture main body 11 is held by a holder 19 that is fixed to the ceiling material 17 and holds the fixture main body 11, for example. The fixture main body 11 of the lighting fixture 12 has a box shape, and a power supply unit 15 is disposed in the fixture main body 11 apart from the fixture main body 11. In the lighting fixture 12 having the configuration shown in FIG. 11, the holder 19 is fixed to the ceiling member 17 with a fixing screw (not shown) or the like. It is good also as a structure which can be attached to a wiring duct.

  A lead-out hole (not shown) for drawing out the pair of electric wires 4 and 4 and the connector 4a of the LED unit 10 into the instrument main body 11 is provided in the attachment portion 11f to which the LED unit 10 is attached in the instrument main body 11. Further, a translucent cover 22 that covers the LED unit 10 is attached to the attachment portion 11 f of the instrument body 11. Here, the translucent cover 22 has a function of diffusing and transmitting the light emitted from the LED unit 10.

Moreover, the lighting fixture 12 of the structure shown in FIG. 12 is a bracket with which the fixture main body 11 is fixed to the wall material 18, for example. The fixture main body 11 of the lighting fixture 12 has a box shape, and a power supply unit 15 is disposed in the fixture main body 11 apart from the fixture main body 11. In addition, the instrument main body 11 is formed with a recess 11 d that houses the connector 4 a of the LED unit 10 and the connector 14 on the power supply unit 15 side. Further, a translucent cover 22 that covers the LED unit 10 is attached to the attachment portion 11 f of the instrument body 11. Here, the translucent cover 22 has a function of diffusing and transmitting the light emitted from the LED unit 10.

  In the LED unit 10 in the lighting fixture 12 having the configuration shown in FIGS. 10 to 12, the electric wires 4 and 4 are led out from the lead-out portion 1 c of the base 1 to the other surface side of the base 1.

The lighting fixture 12 having the configuration shown in FIG. 13 is a ceiling light in which a box-like fixture main body 11 having an open lower surface is directly attached to a ceiling member 17 with a fixing screw (not shown) or the like. In the lighting fixture 12 having the configuration shown in FIG. 13, the power supply unit 15 and the base 1 of the LED unit 10 are disposed side by side in the fixture main body 11. The power supply unit 15 and the LED unit 10 are attached to the instrument body 11 . In addition, a translucent cover 22 that covers the LED unit 10 and the power supply unit 15 is attached to the instrument body 11. Here, the translucent cover 22 has a function of diffusing and transmitting the light emitted from the LED unit 10. In this lighting fixture 12, a translucent milky white one is used as the translucent cover 22 so that the power supply unit 15 cannot be seen through the translucent cover 22.

Moreover, the lighting fixture 12 of the structure shown in FIG. 14 is a pendant light by which the fixture main body 11 was suspended by the hanging tool 16 fixed to the ceiling material 17, for example. In the lighting fixture 12 having the configuration shown in FIG. 14, the power supply unit 15 and the base 1 of the LED unit 10 are arranged side by side in a box-like fixture main body 11 having an open bottom surface. The power supply unit 15 and the LED unit 10 are attached to the instrument body 11 . In addition, a translucent cover 22 that covers the LED unit 10 and the power supply unit 15 is attached to the instrument body 11. Here, the translucent cover 22 has a function of diffusing and transmitting the light emitted from the LED unit 10. In the lighting fixture 12 having the configuration shown in FIG. 14, a plurality of sets of LED units 10 and power supply units 15 are housed in the fixture body 11. Moreover, in this lighting fixture 12, the milky white thing which has translucency is used as the translucent cover 22 so that the power supply unit 15 cannot be seen through the translucent cover 22. FIG.

  The lighting fixture 12 having the configuration shown in FIG. 15 is a vertically long pouch light in which the fixture main body 11 is fixed to the wall material 18. In this luminaire 12, the flat plate-like instrument body 11 is fixed to the wall member 18 by a fixing screw (not shown) or the like. And the LED unit 10 and the power supply unit 15 are attached to the opposite side to the wall material 18 side in this instrument main body 11. FIG. Here, the base 1 of the LED unit 10 and the power supply unit 15 are arranged apart from each other. In the lighting fixture of FIG. 15, the LED unit 10 is disposed above the power supply unit 15, but this is not limiting, and the vertical relationship between the LED unit 10 and the power supply unit 15 may be reversed. In addition, a translucent cover 22 that covers the LED unit 10 and the power supply unit 15 is attached to the instrument body 11. Here, the translucent cover 22 has a function of diffusing and transmitting the light emitted from the LED unit 10. In this lighting fixture 12, a translucent milky white one is used as the translucent cover 22 so that the power supply unit 15 cannot be seen through the translucent cover 22.

  The LED unit 10 in the lighting fixture 12 having the configuration shown in FIGS. 13 to 15 leads the wires 4 and 4 from the lead-out portion 1 c of the base 1 to the side of the base 1.

  Since each lighting fixture 12 demonstrated above is provided with the above-mentioned LED unit 10 and the fixture main body 11 to which the LED unit 10 is attached, size reduction and cost reduction of the LED unit 10 attached to the fixture main body 11 can be achieved. In addition, reliability can be improved. Moreover, since each LED fixture 10 is equipped with the connector 4a to which the said other end part of the electric wires 4 and 4 was connected, each lighting fixture 12 is easy to attach or detach the LED unit 10, and replacement | exchange of LED unit 10 is carried out. Work can be easily performed.

(Embodiment 2)
Hereinafter, the LED unit 10 of the present embodiment will be described with reference to FIGS.

  The basic configuration of the LED unit 10 of the present embodiment is the same as that of the first embodiment, the configuration of the cover 20 is different, and the inner cover 40 (see FIG. 1) described in the first embodiment is not provided. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 1, and description is abbreviate | omitted suitably.

  The cover 20 in the LED unit 10 of the present embodiment is attached to the base 1 while holding the lens unit 7 formed of a translucent material (for example, silicone resin, acrylic resin, glass, etc.) and the lens unit 7. The lens holding part 8 is comprised. Here, in the cover 20, the lens unit 7 has a function of transmitting light emitted from the light emitting device 3.

  The lens unit 7 is formed in a convex shape toward the light emitting device 3, and a recess 7a having an opening size larger than the planar size of the light emitting unit 3a is formed at the tip. Further, the lens portion 7 is formed so that the outer diameter gradually decreases as it approaches the light emitting device 3 side from the light emitting surface 7b of the lens portion 7. Further, the lens portion 7 has a recess 7c formed in the center portion on the light emitting surface 7b side. In addition, although the lens part 7 forms the recessed part 7c in the center part by the side of the light-projection surface 7b, it is not restricted to this, For example, the center part of the light-projection surface 7b is on the opposite side to the light-emitting device 3 side. You may form in the convex curve shape which protrudes.

  The lens unit 7 has a function of guiding light incident from the inner bottom surface 7f of the recess 7a to the inner bottom surface 7g of the recess 7c, and light incident from the inner surface 7h of the recess 7a. And is designed to have a function of guiding the light toward the light exit surface 7b side of the lens unit 7.

  The lens holding portion 8 is formed of a non-translucent material (for example, a black resin, a metal such as aluminum), a cylindrical main body portion 8a in which the lens portion 7 is accommodated and disposed, and the main body portion 8a. And an eaves portion 8b extending outward from the end portion on the base 1 side (lower side in FIG. 16). Here, in the LED unit 10 of the present embodiment, since the lens holding portion 8 is formed of a non-translucent material, it is possible to block the light emitted from the outer surface 7d of the lens portion 7 and emit light. Light from the device 3 can be emitted from the light exit surface 7 b of the lens unit 7. In other words, the LED unit 10 of the present embodiment can collect the light from the light emitting device 3 in a certain range. The outer surface 7d of the lens unit 7 is formed in a paraboloid shape.

  Holding projections 8e for holding the lens unit 7 are formed at a plurality of locations on the end of the main body 8a opposite to the base 1 side. As for the main-body part 8a, the holding protrusion 8e is formed in three places. Here, in the main body portion 8a, three holding projections 8e are arranged at equal intervals in the circumferential direction. The holding protrusion 8e holds the outer flange portion 7j extending outward from the outer surface 7d of the lens portion 7 between the step portion 8h formed on the inner surface of the main body portion 8a. In addition, it is preferable that the LED unit 10 ensures airtightness by joining the outer collar part 7j of the lens part 7 and the main body part 8a with an adhesive or the like.

  By the way, the outer surface 7d of the lens unit 7 is provided with a projection 7e for positioning when the lens unit 7 is attached to the lens holding unit 8. Here, the inner peripheral wall of the main body portion 8a is provided with a recess 8k (see FIG. 17D) for positioning the protrusion 7e at a portion corresponding to the protrusion 7e of the lens portion 7.

  Further, when the sealing material in the groove 1t of the base 1 overflows in the portion corresponding to the lead-out portion 1c of the base 1 in the flange portion 8b of the lens holding portion 8, the sealing that overflows is caused. A recess 8g (see FIG. 17D) for storing the material is formed.

  In addition, an annular rib (protruding portion) 8f protrudes toward the base 1 side (lower side in FIG. 18) at a portion corresponding to the groove portion 1t of the base 1 on the peripheral portion of the flange portion 8b of the lens holding portion 8. It is installed. Therefore, the LED unit 10 of this embodiment puts the rib 8f of the lens holding part 8 into the groove part 1t of the base 1 into which the uncured sealing material is injected, and then hardens the sealing material. Thus, by forming a seal portion (not shown), it is possible to suppress intrusion of moisture or impurities into the LED unit 10.

  On one surface (the lower surface in FIG. 16) of the flange portion 8b of the lens holding portion 8, a plurality (four in this case) projecting toward the base 1 side at portions corresponding to the through holes 1a of the base 1 are provided. A cylindrical boss portion 8c is provided. Here, the above-described cover 20 allows each boss portion 8c in the flange portion 8b of the lens holding portion 8 to pass through each through-hole 1a of the base 1, and then the tip of each boss portion 8c from the other surface side of the base 1. The cover 20 is attached to the base 1 by plastically deforming the portion by irradiation with a laser beam or the like and expanding the portion beyond the through hole 1 a of the base 1. In short, the boss portion 8c finally has a mushroom-like shape. Here, on the other surface side of the base 1, a storage portion 1j in which a head 8ca of a mushroom-like boss portion 8c is stored and disposed at a portion corresponding to each through hole 1a communicates with the through hole 1a. Is formed. Here, the depth dimension of each storage portion 1j is set so that the head 8ca of the boss portion 8c does not protrude from the plane including the other surface of the base 1. The method for attaching the cover 20 to the base 1 is not particularly limited, and for example, the cover 20 may be attached to the base 1 using an assembly screw or the like.

  Further, in the outer peripheral portion of the flange portion 8b, the mounting screw is inserted from the other surface side (the upper surface side in FIG. 16) of the flange portion 8b into a portion corresponding to each screw insertion hole 1b of the peripheral portion of the base 1. A semicircular cutout 8d is formed. Therefore, since the LED unit 10 of this embodiment forms each notch part 8d in the outer peripheral part of the collar part 8b, it covers the base 1 similarly to each lighting fixture 12 shown in FIGS. It becomes possible to detachably attach to the fixture body 11 of the lighting fixture 12 from the 20 side.

  As described in the first embodiment, the LED unit 10 of the present embodiment described above can be reduced in size and cost and can be improved in reliability.

  Moreover, since each lighting fixture 12 using the LED unit 10 of the present embodiment includes the LED unit 10 and the fixture main body 11 to which the LED unit 10 is attached, the LED unit 10 attached to the fixture main body 11 is small. And cost can be reduced, and reliability can be improved.

DESCRIPTION OF SYMBOLS 1 Base 1c Lead-out part 2 Holder 2a Window hole 2d Screw insertion hole 3 Light-emitting device 3a Light-emitting part 3b Mounting board 3c Terminal part 9 Thermally conductive sheet 10 LED unit 11 Appliance main body 12 Lighting fixture 20 Cover 23d Assembly screw

Claims (4)

  A disk-shaped base, a thermally conductive sheet having electrical insulation and thermal conductivity disposed on the base on one surface side of the base, a light emitting unit using an LED chip on one surface side of the mounting substrate, and the above A light emitting device provided with a terminal portion for supplying power to the light emitting portion and disposed so that the other surface of the mounting substrate is in contact with the thermal conductive sheet; and a window hole for extracting light emitted from the light emitting device. A holder disposed on the opposite side to the base side of the light emitting device and holding the mounting substrate between the base and the screw insertion hole provided in the holder; An assembly screw that couples the light source and a light source disposed on the side opposite to the base side of the holder and attached to the base and having a function of transmitting light emitted from the light emitting device. The mounting board has a rectangular planar shape, a dimension in the longitudinal direction is set smaller than an outer diameter dimension of the base, the thermal conductive sheet is smaller than the base, and the assembly screw Are separated from the mounting substrate in the short direction on both sides in the short direction of the mounting substrate.   2. The LED unit according to claim 1, wherein the heat conductive sheet has a shape that does not overlap a projection region of the screw insertion hole on the one surface side of the base.   3. The LED unit according to claim 1, wherein a lead-out portion that can lead out an electric wire connected to the terminal portion to the outside is formed on a peripheral portion of the base.   A lighting fixture comprising: the LED unit according to any one of claims 1 to 3; and a fixture main body to which the LED unit is attached.

Images