JP5760174B2 - 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, lighting fixtures (LED lighting fixtures) provided with LED units have been proposed (for example, Patent Documents 1 and 2).

  As shown in FIG. 17, the LED lighting apparatus disclosed in Patent Document 1 includes an LED module substrate 37 on which a plurality of LED chips 36 and the like are mounted. The LED module substrate 37 is provided with a terminal block 24 including a terminal portion 39 that is a quick connection terminal for directly connecting a power supply wire 38 to the LED module substrate 37. The terminal block 24 is provided with a release button 25 for releasing the connection between the power supply wire 38 and the terminal portion 39. In the LED lighting apparatus including the LED module substrate 37 described above, each LED chip 36, the LED module substrate 37, the terminal block 24, and the like constitute an LED unit.

  Moreover, the LED lighting apparatus disclosed in Patent Document 2 is a pendant light that is used by being suspended from a ceiling, for example, and as shown in FIG. 18A, an LED on which a plurality of LEDs 26 are mounted. A substrate 27 and a power supply circuit 28 for supplying power to the LED substrate 27 are provided. The LED lighting apparatus includes a bottomed cylindrical LED casing 29 that houses the LED substrate 27, and a bottomed cylindrical power casing 30 that is configured separately from the LED casing 29 and houses the power circuit 28. Have. The power supply casing 30 is disposed above the LED casing 29.

  The bottom wall 30c of the power supply casing 30 is formed with a cord through hole 30d through which the power supply side cord 32 electrically connected to the power supply circuit 28 can be inserted. As shown in FIG. 18B, a connection plug 32 a is provided at the tip of the power supply side cord 32. In addition, hooks 34 for holding the LED casing 29 are provided at a plurality of locations on the bottom surface of the power supply casing 30.

  An upper surface member 29 a that closes the opening of the LED casing 29 is attached to the LED casing 29. The upper surface member 29a is formed with a cord through hole 29b through which the LED side cord 33 electrically connected to the LED substrate 27 can be inserted. A connection plug 33 a that can be attached to and detached from the connection plug 32 a of the power supply side cord 32 is provided at the tip of the LED side cord 33. Further, the upper surface member 29a is formed with a plurality of hook grooves 35 for hooking the hooks 34 of the power supply casing 30. Therefore, the LED lighting apparatus having the configuration shown in FIG. 18 can be detachably attached by bringing the upper surface member 29a attached to the LED casing 29 and the bottom wall 30c of the power supply casing 30 into surface contact. In the LED lighting apparatus having the configuration shown in FIG. 18, each LED 26, LED board 27, LED casing 29, upper surface member 29a, LED side cord 33, and connection plug 33a constitute an LED unit. ing.

  Thereby, in the LED lighting fixture disclosed by patent document 1, 2, an LED unit can be attached or detached comparatively easily.

In the LED unit of Patent Document 2, it is disclosed that the LED casing 29 and the power supply casing 30 are formed of a heat dissipating material such as aluminum, copper, brass, ceramic, and the like, and the LED casing 29 and the power supply casing 30 dissipate heat. Yes. Further, it is disclosed that the LED unit is fixed between the LED substrate 27 and the LED casing 29 via an insulating member (not shown) to improve electrical insulation with the LED casing 29. However, in Patent Document 2, it is unclear what the insulating member is, and it is not clear how the insulating member is specifically arranged and fixed.

  By the way, the LED self-heats with the lighting and the temperature rises. The LED has a characteristic that the luminous efficiency decreases as the temperature rises. Further, the LED has a characteristic that the lifetime is shortened if the temperature of the LED becomes too high. Therefore, it is extremely important for the LED unit to efficiently dissipate heat from the LED.

  Therefore, as an LED lighting device different from the above, a heat dissipation sheet is housed in a recess provided on one surface side of the device main body, and a light emitting device using an LED chip is disposed on the opposite side of the heat dissipation sheet to the device main body. What is fixed in this way is also known (for example, Patent Document 3).

  The illumination device disclosed in Patent Document 3 is capable of efficiently removing heat from the light emitting device to the instrument body.

JP 2003-59330 A JP 2008-258066 A JP 2010-147000 A

  For this reason, it is conceivable that the LED unit is configured to have both insulation and heat dissipation by using the heat dissipation sheet of Patent Document 3 instead of the insulating member in the LED unit of Patent Document 2.

  By the way, LED generally has higher directivity than other light sources. For this reason, in an LED unit in which a heat dissipation sheet is simply arranged on a flat surface, there is a risk that the optical characteristics vary due to the LED being displaced from a predetermined position due to vibration in the assembly process of the LED unit.

  In addition, the LED unit applies the configuration of Patent Document 3 so that the heat radiating sheet is approximately the same size as the inside of the recess, and the heat radiating sheet is disposed in the recess so that vibration is applied during the assembly process of the LED unit. It is also conceivable to suppress the occurrence of displacement of the heat dissipation sheet. In this case, the heat radiating sheet needs to be accurately arranged in the recess. When the heat radiating sheet partially protrudes from the concave portion, the heat radiating sheet is pressed at the end of the concave portion and partially thinned, and the predetermined electric insulation may not be sufficiently ensured. When the heat-dissipating sheet is partially pressed and the heat-dissipating sheet is damaged, there is a possibility that predetermined electrical insulation and thermal conductivity cannot be ensured. On the other hand, if the size of the recess is made larger than that of the heat dissipation sheet, it becomes difficult to suppress the positioning of the heat dissipation sheet.

  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 capable of suppressing the positional deviation of the heat radiation sheet and easily confirming the positional deviation with a relatively simple configuration. And it is providing the lighting fixture using the same.

The LED unit of the present invention includes a plate-like base having a projecting portion on one surface side, a heat radiation sheet provided on the front end surface of the projecting portion, and a side opposite to the projecting portion of the heat radiation sheet. And a light emitting device using a light emitting device using an LED chip , wherein a recess is formed on the one surface side of the base, and the projecting base portion is an inner bottom surface of the recess. 's provided so as to protrude at the central portion, the heat radiation sheet, the front-end surface is formed larger than the upper Symbol support block is provided with a recess to enter a part of the heat dissipation sheet It is characterized by that.

  In this LED unit, it is preferable that the recess is provided in an outer peripheral portion of the projecting portion in a region where the heat dissipation sheet is to be provided.

  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, with a relatively simple configuration, it is possible to suppress the displacement of the heat dissipation sheet and easily check the presence or absence of the displacement.

  In the lighting fixture of this invention, the lighting fixture provided with the LED unit which can suppress the position shift of a thermal radiation sheet and can confirm the presence or absence of a position shift easily with a comparatively simple structure can be provided. .

FIG. 3 is an exploded perspective view of the LED unit according to the first embodiment. It is a schematic sectional drawing of an LED unit same as the above. The principal part of an LED unit same as the above is shown, (a) is a perspective view, (b) is explanatory sectional drawing. The principal part of an LED unit same as the above is shown, (a) is a perspective view, (b) is explanatory sectional drawing. It is a top view which shows the other structural example of the principal part 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 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. It is a schematic sectional drawing of an LED unit same as the above. It is a perspective view of the LED module board in the LED lighting fixture of a prior art example. The other LED lighting fixture of a prior art example is shown, (a) is sectional drawing, (b) is a schematic exploded perspective view.

(Embodiment 1)
Hereinafter, the LED unit 10 of this embodiment is demonstrated, referring FIGS.

  The LED unit 10 of the present embodiment includes a plate-like (for example, disc-like) base 1 having a protruding portion 1f on one surface side (the upper surface side in FIG. 1), and a tip surface 1fa of the protruding portion 1f. A heat-dissipating sheet 9 having electrical insulation and thermal conductivity provided on the light-emitting device, and a light-emitting device 3 using an LED chip (not shown) arranged on the opposite side of the projecting portion 1f of the heat-dissipating sheet 9. Have. In particular, the protruding portion 1 f of the LED unit 10 includes a recess 1 q that allows a part of the heat dissipation sheet 9 to enter.

  Further, the LED unit 10 includes a bottomed cylindrical (for example, bottomed cylindrical) holder 2 that holds the light emitting device 3 between the base 1 and the front side of the light emitting device 3 (upper side in FIG. 1). And a cover 20 which is attached to the base 1 and has a function of transmitting light emitted from the light emitting device 3. Furthermore, the above-described LED unit 10 includes a pair of power supply wires (lead wires) 4 and 4 that are electrically connected to the light emitting device 3.

  The base 1 used for the LED unit 10 of this embodiment is a base 1 made of aluminum die-casting, and is provided with a projecting portion 1f integrally on one surface side. The base 1 is not limited to aluminum as a material having higher thermal conductivity than the resin, and may be formed of a metal such as copper or stainless steel, for example. Further, the projecting portion 1f is not limited to being formed integrally with the base 1, but may be formed separately.

  A mounting screw (not shown) for detachably attaching the LED unit 10 to the fixture body 11 (see FIG. 9) of the lighting fixture 12 (see FIG. 9) is provided on the periphery of the base 1. Mounting screw insertion holes 1b that are inserted from the surface side are provided at a plurality of locations (two locations in the illustrated example).

  Here, in the LED unit 10 of the present embodiment, the shape of the base 1 is circular, but is not limited thereto, and may be, for example, a polygonal shape or an elliptical shape.

  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 part 3a includes a plurality of LED chips (not shown), a peripheral wall part 3e that surrounds the plurality of LED chips and reflects light from the LED chip, and a sealing part that covers the LED chips in the peripheral wall part 3e. 3d. 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 using, for example, a metal base printed wiring board, and a pair of 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 board 3b uses a metal-based printed wiring board, but is not limited thereto, and for example, a ceramic board or a glass epoxy board may 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 or the like covering the light emitting portion 3a and the portions other than the terminal portions 3c and 3c is formed on one surface side of the mounting substrate 3b. It is possible to suppress the light emitted from the light emitting unit 3a from being absorbed by the mounting substrate 3b.

  In addition, the above-described heat dissipation sheet 9 is disposed between the other surface of the mounting substrate 3b and the projecting portion 1f that projects from the one surface side of the base 1. Therefore, the light emitting device 3 described above can efficiently dissipate heat generated by the light emitting device 3 to the base 1 through the heat dissipation sheet 9. Further, in the LED unit 10 of the present embodiment, since the base 1 is made of aluminum having a higher thermal conductivity than the resin, the heat generated in the light emitting device 3 is converted to the heat radiation sheet 9 and the protruding portion 1f of the base 1. It is possible to dissipate heat to the instrument body 11 side through.

  As the heat dissipating sheet 9, a silicone gel sheet using a silicone resin made of a gel-like elastomer material that is gel-like, has a low crosslinking density, is soft, and has elasticity is suitably used. Although the heat dissipation sheet 9 preferably uses a silicone gel sheet, it may be any material that is excellent in electrical insulation and thermal conductivity and that partially enters the recess 1q. Therefore, the heat radiating sheet 9 is not limited to the silicone gel as the material of the heat radiating sheet 9, and may be any soft elastomer material (for example, acrylic resin material) having electrical insulation and thermal conductivity. Moreover, the heat radiating sheet 9 may be provided with adhesiveness and function as an adhesive sheet.

  By the way, on the one surface side of the base 1, 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 is formed.

  At the central portion of the inner bottom surface of the recess 1e, the above-described protruding base portion 1f that protrudes toward the light emitting device 3 side (the upper side in FIG. 1) is provided. The projecting portion 1f is formed in a rectangular shape (in the illustrated example, a rectangular shape) in plan view. Here, the light-emitting device 3 is disposed such that the heat dissipation sheet 9 is interposed between the front end surface 1fa of the protruding portion 1f.

  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 dissipation sheet 9 is larger than the depth dimension of the recess 1e. Yes. Therefore, the protrusion 1 f can suppress the light emitted from the light emitting device 3 from being reflected or absorbed by the inner surface of the recess 1 e of the base 1.

  Moreover, the recessed part 1q into which a part of the soft heat radiating sheet 9 can enter is formed in the front end surface 1fa of the projecting part 1f at a plurality of locations (four locations in FIG. 1). As a result, the LED unit 10 has the heat dissipation sheet 9 interposed between the protrusion 1f and the light emitting device 3 before the light emitting device 3 and the heat dissipation sheet 9 are sandwiched between the base 1 and the holder 2 during assembly. It is possible to prevent the positional deviation in the lateral direction.

  More specifically, the protrusion 1f is provided with a recess 1q in the outer periphery in the region where the heat dissipation sheet 9 is provided, and the heat dissipation sheet 9 is placed so as to cover the front end surface 1fa of the protrusion 1f. As a result (see FIG. 3A), a part of the heat dissipation sheet 9 enters the recess 1q (see FIG. 3B). The heat radiating sheet 9 can cause an anchor effect in which a part of the heat radiating sheet 9 that has entered the recess 1q suppresses the displacement of the heat radiating sheet 9. Therefore, even when vibration or the like is applied to the LED unit 10 in the middle of assembly in the assembly process of the LED unit 10 to be described later with reference to FIGS. 5 to 8, a part of the heat dissipation sheet 9 that has entered the recess 1q Can be prevented from being displaced from the protrusion 1f.

Recess 1q provided in the support block 1f, the thickness of the heat dissipation sheet 9, the light emitting equipment 3 the size and shape of the recess portion 1q in accordance with the shape, the width and depth may be set appropriately. The recess 1q can be formed, for example, by setting the thickness of the heat dissipation sheet 9 to 1.0 mm and the width and depth of the recess 1q within a range of 0.3 to 0.5 mm. The heat dissipating sheet 9 has a size that covers the recess 1q, and may be stacked in a region where the heat dissipating sheet 9 on the front end face 1fa is to be provided. That is, the recess 1q is provided on the outer peripheral portion of the region where the heat dissipation sheet 9 is to be provided.

  Further, the recess 1q is formed by providing the recesses 1q on the outer peripheral portion corresponding to the four sides of the region where the heat dissipating sheet 9 is to be provided on the front end surface 1fa of the projecting portion 1f having a rectangular shape in plan view. It is possible to determine the displacement relatively easily. In the assembly process, when the heat dissipation sheet 9 is displaced from a predetermined stacking position in the assembly process, the recess 1q is exposed to the outside as shown in FIG. It can be confirmed. In other words, in the assembly process, the LED unit 10 assumes that the heat radiating sheet 9 is properly arranged unless the heat radiating sheet 9 covers the protruding portion 1f and the recess 1q is exposed as shown in FIG. be able to. In addition, as shown in FIG. 4, if the recess 1q is exposed to the outside, the heat radiating sheet 9 is misaligned, and a predetermined heat radiating characteristic and electric insulation characteristic are ensured between the light emitting device 3 and the base 1. There is a fear that it is not done.

  The LED unit 10 of the present embodiment is considered to ensure the heat dissipation characteristics and electrical insulation characteristics of the LED unit 10 only by grasping whether or not the recess 1q is exposed to the outside in the assembly process of the LED unit 10. Can be tricked.

  The heat dissipation sheet 9 is generally relatively expensive as compared with thermoplastic resins such as PMMA (polymethyl methacrylate) and PC (Polycarbonate), and is preferably as small as possible. Therefore, if the size of the heat radiating sheet 9 is reduced, the heat insulating sheet 9 must be arranged more accurately in order to ensure electrical insulation characteristics, and the configuration of the LED unit 10 of this embodiment is particularly useful.

  Further, as shown in FIG. 5 (a), the recess 1q is provided not only one by one along each side of the projecting part 1f, but also provided with a heat dissipation sheet 9 as shown in FIG. 5 (b). It is good also as a structure provided with the cyclic | annular part 11 formed in cyclic | annular form along the plan area | region (for example, refer to a dashed-two dotted line).

  Further, the recessed portion 1q forms a sealed space by the heat radiating sheet 9 and the recessed portion 1q when the heat radiating sheet 9 covers the front end surface 1fa of the projecting portion 1f, as shown in FIGS. 5 (a) and 5 (b). It is not restricted only to the structure shown in. That is, when the heat radiating sheet 9 is installed on the projecting part 1f, the recess 1q may be configured such that air is trapped between the heat radiating sheet 9 and the projecting part 1f so that the heat radiating sheet 9 does not wrinkle. It becomes possible.

  Specifically, as shown in FIG. 5C and FIG. 5D, the recess 1q penetrates from the annular portion 1l provided on the inner side of the tip surface 1fa of the projecting portion 1f to the outer side of the tip surface 1fa. Such communication grooves 1m and 1n may be provided.

  Further, when the surface on which the heat radiating sheet 9 is provided is configured as a simple flat surface larger than the heat radiating sheet 9, it is difficult to grasp whether the heat radiating sheet 9 is arranged at a predetermined position with a predetermined tolerance. In this case, if only confirming whether the heat radiation sheet 9 is in a predetermined position, not only the recess 1q is provided in the outer peripheral portion in the region where the heat radiation sheet 9 is to be provided, but also from the front end surface 1fa of the projecting portion 1f. Providing protruding protrusions is also conceivable. Here, the LED unit 10 in which a part of the heat radiating sheet 9 is inserted into the recess 1q provided in the outer peripheral portion in the region where the heat radiating sheet 9 is provided is provided with a convex portion protruding from the tip surface 1fa of the projecting portion 1f. In comparison with the above, even when the light emitting device 3 is pressed and fixed to the base 1 side, the heat dissipation sheet 9 is less likely to be thinned. That is, the LED unit 10 has a soft heat dissipation when the light-emitting device 3 is pressed and fixed to the base 1 side when the heat-dissipating sheet 9 is positioned by a protrusion provided on the front end surface 1fa of the projecting portion 1f. There is a possibility that the heat radiating sheet 9 may be damaged because the sheet 9 is partially thin at the convex portion. However, in the LED unit 10 of the present embodiment, it is possible to prevent the heat dissipation sheet 9 from being damaged.

  Further, the cover 20 combined with the light emitting device 3 using the LED chip is generally in the form of a lens in order to maximize the optical characteristics, and the optical axis of the lens shaped cover 20 and the light emitting device are often used. It is more desirable to match the center of the three light emitting portions 3a with high accuracy.

  Here, the manufacturing apparatus of the LED unit 10 performs, for example, an image capturing unit that captures the base 1 on which the heat dissipation sheet 9 is disposed, an image captured and generated by the image capturing unit, and stores the image in a storage unit in advance. Pattern recognition means for recognizing the pattern in comparison with the pattern having the shape of the recessed portion 1q may be provided. Thereby, when the manufacturing apparatus of LED unit 10 recognizes what the hollow part 1q of the protrusion part 1f exposed, it becomes possible to discriminate the manufacturing apparatus of LED unit 10 as a defective product. That is, it is possible to relatively easily check the heat dissipating sheet 9 and the arrangement of the light emitting device 3 on the heat dissipating sheet 9 and to assemble only those satisfying predetermined optical characteristics.

  That is, the LED unit 10 of the present embodiment grasps that the center of the base 1 and the center of the light emitting device 3 using the LED chip coincide with each other, and suppresses the assembly of those that cause variations in optical characteristics. Is also possible.

  The holder 2 includes a presser plate portion 2e that holds the light emitting device 3 between the projecting base portion 1f and a peripheral wall portion 2f that extends rearward (base 1 side) from the periphery of the presser plate portion 2e. doing. 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.

  Here, on the inner bottom surface of the recess 1e, bosses 1r are projected from both sides of the projecting part 1f in the short direction. Each boss 1r is formed with a screw hole 1d into which an assembly screw 23d for attaching the holder 2 to the base 1 is screwed. Therefore, the LED unit 10 of the present embodiment can reduce the shape of the holding plate portion 2e of the holder 2 as compared with the case where the boss portions 1r are arranged on both sides in the longitudinal direction of the projecting portion 1f. .

  Further, an opening for preventing the electric wires 4 and 4 electrically connected to the respective terminal portions 3 c and 3 c of the light emitting device 3 from interfering with the holder 2 is formed in the peripheral portion of the holding plate portion 2 e of the holder 2. The portions 2b and 2b are formed so as to communicate with the window hole 2a.

  Further, on the periphery of the holding plate portion 2e of the holder 2, an assembly screw 23d is placed on the front side of the holding plate portion 2e of the holder 2 (on the upper surface side in FIG. 1) at a portion corresponding to each screw hole 1d of the base 1. A screw insertion hole 2d is inserted therethrough. Here, when attaching the holder 2 to the base 1, first, the light emitting unit 3 a of the light emitting device 3 is exposed from the window hole 2 a of the holder 2, and the light emitting device 3 is sandwiched between the base 1 and the holder 2. Then, the holder 2 is attached to the base 1 by inserting the assembly screw 23d from the front side of the holding plate portion 2e of the holder 2 into the screw insertion hole 2d and screwing into the screw hole 1d of the base 1. Note that a heat dissipation sheet 9 is disposed between the light emitting device 3 and the base 1.

  Therefore, the LED unit 10 of the present embodiment can absorb and relieve the stress applied to the light emitting device 3 by the heat radiating sheet 9 when the assembly screw 23d is screwed into the screw hole 1d. It is possible to prevent unnecessary stress from being applied.

  Here, in the LED unit 10 of the present embodiment, the shape of the presser plate portion 2e of the holder 2 is circular, but is not limited thereto, and may be, for example, a polygonal shape or an elliptical shape. Good.

  Further, a lead-out portion 1 c for leading a pair of 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 portion 1c is a notch formed in the peripheral portion of the base 1, and can change the direction in which the pair of electric wires 4 and 4 are led out to the outside of the LED unit 10.

  More specifically, the lead-out portion 1c has the other surface (the lower surface in FIG. 2), the side surface, and the one surface of the base 1 open at the periphery of the base 1. That is, the lead-out part 1c changes the direction in which the pair of electric wires 4 and 4 are led out of the LED unit 10 between the other surface side of the base 1 and the direction along the other surface of the base 1. (See the arc arrow in FIG. 2). Further, when the lead-out portion 1c leads out the pair of electric wires 4 and 4 led out from the lead-out portion 1c in a direction perpendicular to the other surface of the base 1, the pair of electric wires 4 and 4 are connected to the outer peripheral line of the base 1 Is also formed so as to be arranged inside.

  Therefore, the LED unit 10 of the present embodiment can lead out the pair of electric wires 4 and 4 led out from the lead-out portion 1c to the other surface side and the side of the base 1. In other words, the LED unit 10 has a degree of freedom of relative positional relationship with the power supply unit 15 (see FIG. 9) that supplies power to the LED unit 10 as compared with the LED unit of the conventional example shown in FIG. It becomes possible to raise. As a result, the LED unit 10 of the present embodiment can increase the degree of freedom of the relative positional relationship with the power supply unit 15, and thus can be attached to the instrument body 11 of various forms. Moreover, in this LED unit 10, when the derivation | leading-out part 1c derives | leads out the pair of electric wires 4 and 4 derived | led-out from this derivation | leading-out part 1c to the direction side orthogonal to the said other surface of the base 1, a pair of electric wires 4 and 4 Is formed so as to be disposed on the inner side of the outer peripheral line of the base 1, for example, when the instrument main body 11 is formed in a cylindrical shape, the minimum diameter of the instrument main body 11 is the same as the outer dimension of the base 1. It becomes possible to set to the dimension of a grade, and it becomes possible to achieve size reduction of the lighting fixture 12.

By the way, in the recess 1e of the base 1, ribs 1ha and 1hb are provided on the lead-out portion 1c side (lower side in FIG. 2) to sandwich each of the electric wires 4 and 4 with the inner peripheral surface of the recess 1e. It protrudes from the inner bottom surface (see FIG. 6A). More specifically, the rib 1ha that sandwiches one electric wire 4 between the inner peripheral surface of the recess 1e and the other electric wire 4 are provided on the inner bottom surface on the lead-out portion 1c side in the recess 1e of the base 1. A rib 1hb sandwiched between the inner peripheral surface of the recess 1e is projected. Further, the inner peripheral surface of the recess 1e of the base 1 is provided between the inner surface 1g of the lead-out portion 1c on the inner peripheral surface of the recess 1e and each of the two ribs 1hd and 1hd projecting near the boundary. A rib 1hc that holds the electric wires 4 and 4 protrudes (see FIG. 7A). The rib 1hc is formed continuously with the boss 1r. The rib 1ha and the rib 1hb are connected via a connecting piece 1he projecting from the inner bottom surface of the recess 1e of the base 1.

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

  Further, on the side of the holder 2 in the LED unit 10, a sandwiching portion 2 c for sandwiching the pair of electric wires 4 and 4 led out from the lead-out portion 1 c with the base 1 at a portion corresponding to the lead-out portion 1 c of the base 1. Is formed. 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 with the base 1 and can be held between the base 1 and the holding portion 2c. .

  Further, as shown in FIG. 2, a chamfered portion 1 k is formed on the base 1 between an inner surface 1 g of the lead-out portion 1 c of the base 1 and an inner bottom surface of the recess 1 e of the base 1. Therefore, since the chamfered portion 1k is formed on the base 1 in the LED unit 10 of the present embodiment, the stress applied to the pair of electric wires 4 when the electric wires 4 are bent to the other surface side of the base 1 is reduced. It becomes possible. Moreover, since the LED unit 10 can reduce the stress applied to each electric wire 4 when the 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. . The chamfered portion 1k is a C chamfered portion, but is not limited thereto, and may be, for example, an R chamfered portion.

  Further, the lead-out portion 1c may be formed by opening not only the other surface of the base 1 (the right side surface in FIG. 2) but also the side surface and one surface (the left side surface in FIG. 2) in the peripheral portion of the base 1. . That is, the other surface, side surface, and one surface of the cover pressing member 21 may be opened (not shown) in the peripheral portion of the cover pressing member 21 corresponding to the lead-out portion 1c. Thereby, the derivation | leading-out part 1c can also change the direction which guides a pair of electric wires 4 and 4 outside the LED unit 10 between the said other surface side of the base 1, and the said one surface side of the base 1. It becomes possible. In short, the LED unit 10 can further increase the degree of freedom of the positional relationship with the power supply unit 15 and can be attached to the instrument body 11 of various forms.

  The cover 20 is made of a translucent material (for example, silicone resin, acrylic resin, glass, etc.). The cover 20 is disposed on the inner side of the outer peripheral line of the base 1 and has a bottomed cylindrical main body 20a that covers the light emitting device 3, and extends outward from the end of the main body 20a. And a flange portion 20b for attaching to the base 1. The main body portion 20a includes a bottom plate portion 20h and a cylindrical portion 20j, and a lens may be formed on a part of the bottom plate portion 20h. 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.

  Further, between the base 1 side of the cover 20 (the lower side in FIG. 1) and the front side of the holding plate portion 2e of the holder 2, the screw insertion holes 2d and 2d of the holder 2 are respectively inserted. An annular (for example, annular) decorative cover 40 is disposed to cover the assembly screws 23d and 23d and the electric wires 4 and 4 exposed from the openings 2b and 2b of the holder 2.

  The decorative cover 40 is formed of a non-translucent material (for example, white opaque resin) and is housed and disposed in the main body portion 20 a of the cover 20. The decorative cover 40 is formed with a window hole portion 40b for exposing the light emitting portion 3a of the light emitting device 3 at the center. The inner peripheral wall 40c of the window hole portion 40b is appropriately designed to have an inclination angle so that a predetermined light distribution can be obtained by reflecting light from the light emitting portion 3a.

  Therefore, the LED unit 10 of the present embodiment is provided with the decorative cover 40 including the inner peripheral wall 40c of the window hole portion 40b and the outer peripheral wall 40d outside the window hole portion 40b on the front side of the holding plate portion 2e of the holder 2. Therefore, it is possible to prevent the assembly screws 23d and 23d and the electric wires 4 and 4 from being seen through the cover 20, and it is possible to improve the appearance design.

  Further, an annular projecting portion 20e (see FIG. 2) projects from the periphery of the flange portion 20b of the cover 20 on the base 1 side. Here, on the one surface side of the base 1, a groove portion 1 t capable of accommodating the protruding portion 20 e is formed at a portion corresponding to the protruding portion 20 e of the cover 20. The groove 1t is filled with a sealing material 5 (for example, silicone resin) for hermetic sealing. Therefore, in the LED unit 10 of the present embodiment, the protrusion 20e of the cover 20 is accommodated in the groove 1t of the base 1 filled with the sealing material 5, so that moisture, impurities, etc. enter the LED unit 10. Can be suppressed.

  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 outer peripheral surface of the main body portion 20a of the cover 20. Is formed in a flat annular shape (in the illustrated example, an annular shape) so as not to disturb the light to be emitted 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.

  Further, if the sealing material 5 filled in the groove portion 1t of the base 1 overflows at the portion corresponding to the lead-out portion 1c of the base 1 at the peripheral portion of the cover pressing member 21, the overflow has occurred. A recess 21a (see FIG. 2) capable of storing the sealing material 5 is formed. Here, a notch for guiding the overflowing sealing material 5 to the recess 21 a of the cover presser member 21 at a portion corresponding to the recess 21 a of the cover presser member 21 is provided on the outer peripheral portion of the flange portion 20 b of the cover 20. A portion 20f is formed.

  Further, a plurality of cylindrical boss portions (two of the four are visible in FIG. 1) projecting toward the base 1 side are provided on one surface (the lower surface in FIG. 1) of the cover pressing member 21. 21c is provided. Here, on the outer peripheral portion of the flange portion 20b of the cover 20, semicircular cutout portions 20d that pass through the boss portions 21c are formed at portions corresponding to the boss portions 21c of the cover pressing member 21, respectively. Has been. In addition, a through hole 1 a through which the boss portion 21 c is penetrated 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-mentioned cover 20 to the base 1, after inserting each boss | hub part 21c of the cover holding member 21 in each through-hole 1a of the base 1, the said other surface side (in FIG. The cover 20 is attached to the base 1 by plastically deforming the tip of each boss portion 21c from the lower surface side by applying a laser beam or the like and expanding it beyond the through hole 1a 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 through-hole is provided by a storage portion 1 j in which a head (tip portion) of a mushroom-like boss portion 21 c is stored and disposed in a portion corresponding to each through-hole 1 a. 1a is formed in communication. Here, the depth dimension of each storage part 1j is set so that the head of the mushroom-like boss part 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 excessive 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. In addition, 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 main body 11 and the LED unit 10 is turned on, the main body portion 20a of the cover 20 There are fewer elements that hinder the desired light distribution and uniformity of the light emitted from the outer peripheral surface. 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, on the outer peripheral portion of the cover pressing member 21, mounting screws (not shown) are attached to portions corresponding to the respective mounting screw insertion holes 1b of the base 1 on the other surface side of the cover pressing member 21 (in FIG. 1, A semicircular cutout portion 21b that is inserted from the upper surface side is formed. Further, on the outer peripheral portion of the flange portion 20 b of the cover 20, the mounting screws are attached to the cover pressing member 21 at portions corresponding to the mounting screw insertion holes 1 b of the base 1 and the notch portions 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, the base 1 can be detachably attached to the fixture body 11 of the lighting fixture 12 from the cover 20 side.

  By the way, the connector 4a is provided in the front-end | tip part of the site | part derived | led-out from the derivation | leading-out part 1c of the base 1 in a pair of electric wires 4 and 4. FIG. As shown in FIG. 9, the connector 4 a can be detachably connected to a connector 14 on the power supply unit 15 side provided at the distal end portion of the power supply line 13 that is electrically connected to the power supply unit 15. is there.

  Therefore, since the LED unit 10 of this embodiment is provided with the connector 4a that can be detachably connected to the connector 14 on the power supply unit 15 side at the distal ends of the pair of electric wires 4 and 4, the LED unit 10 can be attached and detached. The connection work at the time can be easily performed. In addition, the LED unit 10 is provided with a connector 4a at the distal ends of the pair of electric wires 4 and 4, and the base 1 can be detachably attached to the fixture body 11 of the lighting fixture 12 from the cover 20 side. Thus, the LED unit 10 can be easily replaced.

  Below, the assembly process of the above-mentioned LED unit 10 is demonstrated, referring FIGS. 6-8.

  First, a rectangular heat radiation sheet 9 larger than the front end surface 1fa is placed on the front end surface 1fa of the rectangular protrusion 1f provided on one surface side of the base 1 in FIG. b)). By placing the heat radiating sheet 9 on the front end face 1fa, a part of the heat radiating sheet 9 enters the recess 1q of the front end face 1fa.

  Next, the light emitting device 3 is stacked on the heat dissipation sheet 9 (see FIG. 6C).

  Subsequently, the electric wires 4 and 4 are sandwiched between the inner peripheral surface of the recess 1e of the base 1 and the ribs 1ha and 1hb, and the electric wires 4 and 4 are electrically connected to the terminal portion 3c of the mounting board 3b ( FIG. 7 (a)).

Subsequently, the holder 2 is put on the light emitting device 3, and the holder 2 is fixed to the base 1 side by the assembly screws 23d and 23d (see FIG. 7B).
A decorative cover 40 is disposed on the holder 2 so as to surround the light emitting unit 3a of the light emitting device 3 (see FIG. 7C).

  Next, after applying the sealing material 5 to the groove 1t of the base 1 (see FIG. 7C), the protrusion 40a protruding from the peripheral portion of the decorative cover 40 and the concave portion provided on the inner peripheral surface of the cover 20 The cover 20 is arranged on the base 1 side by fitting the groove portion 1t and the protruding portion 20e of the cover 20 in alignment with the position 20g (see FIG. 8A). In addition, as shown in FIG.7 (c), the cover 20 is the structure which arrange | positions the cover 20 to the base 1 side after arrange | positioning the decorative cover 40 to the base 1 side so that the light emission part 3a of the light-emitting device 3 may be enclosed. Not only. For example, the cover 20 may be disposed on the base 1 side after the protrusion 40a of the decorative cover 40 is fitted in the recess 20g of the cover 20 in advance to temporarily hold the decorative cover 40 on the cover 20 side.

Finally, the volume scan section 2 1c of the cover pressing member 21 is inserted into the through hole 1a of the base 1, by plastically deformed by irradiation such as a laser beam tip portion of the ball scan section 2 1c other surface side of the base 1 The LED unit 10 can be assembled (see FIG. 8B).

  The lighting fixture 12 including the LED unit 10 assembled in this manner will be described with reference to FIGS. 9 to 14.

  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. Since this lighting fixture 12 has the fixture body 11 made of metal, the heat generated by the light emitting device 3 of the LED unit 10 can be efficiently passed through the heat dissipation sheet 9, the base 1, and the fixture body 11 compared to the case of resin. It is possible to dissipate heat. In addition, although aluminum is employ | adopted as a material of the instrument main body 11, you may employ | adopt metals other than aluminum. Moreover, the material of the instrument body 11 may be a material other than metal.

  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 into portions corresponding to the mounting screw insertion holes 1b of the base 1.

  The lighting fixture 12 having the configuration shown in FIG. 9 is, for example, a downlight that is embedded in the ceiling material 17. The fixture main body 11 of the lighting fixture 12 includes a bottomed cylindrical main body portion 11a in which the LED unit 10 is housed and disposed, and an outer flange portion 11b extending outward from the opening of the main body portion 11a. . 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.

  On the upper side of the bottom 11c of the instrument main body 11, a storage part 11e for storing and arranging the power supply unit 15 is provided, and the power supply unit 15 is arranged away from the instrument main 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.

  Further, a lead-out hole (not shown) through which the pair of electric wires 4 and 4 led out from the LED unit 10 and the connector 4a are drawn into the storage portion 11e is provided in the bottom portion 11c of the instrument body 11.

  The lighting fixture 12 having the configuration shown in FIG. 10 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 bottom portion 11 c of the instrument main body 11, a pair of wires 4, 4 led out from the LED unit 10 and a lead-out hole (not shown) for drawing out the connector 4 a into the instrument main body 11 are provided. In addition, a diffusion plate 22 that diffuses and transmits light emitted from the cover 20 of the LED unit 10 is attached to the bottom 11 c of the instrument body 11 so as to cover the LED unit 10.

  Moreover, the lighting fixture 12 of the structure shown in FIG. 11 is a bracket with which the fixture main body 11 is fixed to the wall surface 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. Note that a diffusion plate 22 that diffuses and transmits light emitted from the cover 20 of the LED unit 10 is attached to the instrument body 11 so as to cover the LED unit 10.

  As shown in FIG. 2, the LED unit 10 in the lighting fixture 12 having the configuration shown in FIGS. 9 to 11 described above has a pair of electric wires 4 and 4 from the lead-out portion 1 c of the base 1 to the other surface side of the base 1 ( In FIG. 2, it is derived downward).

  The lighting fixture 12 having the configuration shown in FIG. 12 is a ceiling light in which, for example, the power supply unit 15 is disposed on the side of the LED unit 10, and the fixture main body 11 is fixed to the ceiling material 17. The lighting fixture 12 having the configuration shown in FIG. 13 is, for example, a pendant light in which the fixture body 11 is suspended from a hanging tool 16 that is fixed to the ceiling member 17 and suspends the fixture body 11. The lighting fixture 12 having the configuration shown in FIG. 14 is a vertically long pouch light in which, for example, the power supply unit 15 is disposed below the LED unit 10 and the fixture main body 11 is fixed to the wall surface 18. The lighting fixture 12 having the configuration shown in FIGS. 12 to 14 includes a diffusion plate 22 that diffuses and transmits light emitted from the cover 20 of the LED unit 10.

  As shown in FIG. 2, the LED unit 10 in the lighting fixture 12 having the configuration shown in FIGS. 12 to 14 described above has a pair of wires 4, 4 extending from the lead-out portion 1 c of the base 1 to the side of the base 1 (FIG. 2). Let's derive to the lower side. The lighting fixture 12 of this embodiment can be made into the lighting fixture provided with the LED unit 10 which can be attached to the fixture main body 11 of various forms.

(Embodiment 2)
The basic configuration of the LED unit of the present embodiment is the same as that of the first embodiment, and the configuration of the cover 6 is different from that of the first embodiment as shown in FIG. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 1, and description is abbreviate | omitted suitably.

  Hereinafter, the cover 6 of the LED unit 10 of the present embodiment will be described with reference to FIGS. 15 and 16.

  The cover 6 includes a lens portion 7 formed of a translucent material (for example, silicone resin, acrylic resin, glass, etc.), and a lens holding portion 8 that holds the lens portion 7 and is attached to the base 1. ing.

  As shown in FIG. 15, the lens unit 7 is formed in a convex shape toward the light emitting device 3 side (lower side in FIG. 15), and the front side of the light emitting device 3 (left side in FIG. 16) at the tip portion. A recess 7a is formed surrounding the surface. 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 recess 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.

  Further, 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 to the outer peripheral surface 7d of the lens unit 7. 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 a flange portion 8b extending outward from the end portion on the base 1 side (right 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 light emitted from the outer peripheral 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.

  Holding projections 8e for holding the lens unit 7 are formed at a plurality of positions on the end of the main body unit 8a on the lens unit 7 side (upper side in FIG. 15). The holding protrusion 8e holds the outer flange portion 7j on the light emitting surface side of the lens portion 7 with a step portion 8h formed on the inner side surface of the main body portion 8a. It is preferable that the outer flange portion 7j of the lens portion 7 and the main body portion 8a are joined with an adhesive or the like. Note that the method of fixing the outer flange portion 7j of the lens portion 7 and the main body portion 8a is not limited to the method using an adhesive. There may be.

  By the way, the outer flange portion 7j of the lens portion 7 is provided with a protruding piece 7e for positioning when the lens portion 7 is attached to the lens holding portion 8. Here, the inner peripheral wall of the main body portion 8a is provided with a concave portion 8j for positioning the protruding piece 7e at a portion corresponding to the protruding piece 7e of the lens portion 7.

  When the sealing material 5 filled in the groove 1t of the base 1 overflows at the portion corresponding to the lead-out portion 1c of the base 1 when the LED unit 10 is assembled, the overflowing sealing material 5 is accumulated in the flange 8b. A recess 8g is formed.

  Further, an annular projecting portion 8 f is provided on the base 1 side (see FIG. 16) at a portion corresponding to the groove portion 1 t of the base 1 on the peripheral portion of the flange portion 8 b. Therefore, the LED unit 10 of the present embodiment accommodates the protruding portion (not shown) of the lens holding portion 8 in the groove portion 1t of the base 1 filled with the sealing material 5, thereby entering the LED unit 10. It is possible to prevent the entry of impurities.

  On one surface (the lower surface in FIG. 15) of the flange portion 8b, a plurality (one in four in FIG. 15) projecting toward the base 1 side is provided at portions corresponding to the through holes 1a of the base 1. A cylindrical boss 8c is visible. Here, the above-described cover 6 has the boss portions 8c of the flange portion 8b of the lens holding portion 8 passed through the through holes 1a of the base 1, and then the other surface side of the base 1 (on the lower surface side in FIG. 15). The cover 6 is attached to the base 1 by plastically deforming the tip of each boss portion 8c by irradiation with a laser beam or the like so as to be wider than the through hole 1a 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 the head (tip portion) of the mushroom-like boss portion 8c is stored and disposed in a portion corresponding to each through hole 1a is formed in the through hole 1a. It is formed in communication. Here, the depth dimension of each storage portion 1j is set so that the head 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 6 to the base 1 is not particularly limited, and for example, the cover 6 may be attached to the base 1 using an assembly screw or the like.

  Moreover, the semicircle which penetrates the said attachment screw from the other surface side (FIG. 16 upper surface side) to the part corresponding to each attachment screw penetration hole 1b of the base 1 in the outer peripheral part of the collar part 8b. A notch 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 attaches the base 1 to the fixture main body 11 of the lighting fixture 12 from the cover 6 side so that attachment or detachment is possible. Is possible.

  Even in the LED unit 10 of the present embodiment, the displacement of the heat dissipation sheet 9 is suppressed with a relatively simple configuration including a recess 1q that allows a part of the heat dissipation sheet 9 to enter the front end surface 1fa of the protruding portion 1f. It is possible to easily confirm the presence or absence of a positional deviation.

DESCRIPTION OF SYMBOLS 1 Base 1f Protrusion part 1q Recessed part 3 Light-emitting device 9 Heat dissipation sheet 10 LED unit 11 Appliance main body 12 Lighting fixture

Claims (3)

A plate-like base provided with a projecting portion on one surface side, a heat radiation sheet provided on the front end surface of the projecting portion, and an LED chip disposed on the opposite side of the heat radiation sheet from the projecting portion an LED unit having a light emitting device using,
A recess is formed on the one surface side of the base,
The protruding base part is provided so as to protrude at the central part of the inner bottom surface of the recess,
The heat dissipation sheet is formed larger than the front end surface,
Prior Symbol support block, LED units comprising the recess caused to enter a portion of the heat radiation sheet.   2. The LED unit according to claim 1, wherein the recess is provided in an outer peripheral portion of the projecting portion in a region where the heat radiation sheet is to be provided.   A lighting fixture comprising: the LED unit according to claim 1 or 2; and a fixture main body to which the LED unit is attached.

Images