JP2015111635A - Led unit and luminaire using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED unit capable of reducing the number of components thereof while maintaining functionality and a luminaire using the same.SOLUTION: An LED unit 10 includes: a plate-like base 1; a light-emitting device 3 which has an LED chip as a light source and is disposed at a first surface 1aa side of the base 1; a power supply wire 4 which is electrically connected to the light-emitting device 3; a holder 2 for fixing the light-emitting device 3 and the wire 4 to the base 1; and a light transmissive cover member 20 which is disposed at the light emitting face side of the light-emitting device 3 and attached to the base 1. The wire 4 is lead out from the base 1. The holder 2 has a protruding part 2c which protrudes outward along the wire 4 as viewed from the light emitting plane side.

Description

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

  Conventionally, the lighting fixture using an LED unit is proposed (for example, patent documents 1).

  As shown in FIG. 24, the LED unit 110 of Patent Literature 1 includes a light emitting device 103 disposed on one surface side of the base 101 and a cover 120 that transmits light emitted from the light emitting device 103. The LED unit 110 includes a cover pressing member 121 that holds the flange portion 120 b of the cover 120 between the base unit 101 and the electric wire 104 that supplies power to the light emitting device 103. In the LED unit 110, a lead-out portion 101 c that can change the direction in which the electric wire 104 is led out is formed on the periphery of the base 101.

  The LED unit 110 of Patent Document 1 has a function capable of changing the direction in which the power supply wire 104 of the LED unit 110 is led out in order to be mounted on various lighting fixtures.

JP 2012-182190 A

  By the way, the LED unit 110 is required to have a configuration capable of further reducing the number of parts while maintaining the functionality. The configuration of the LED unit 110 described above is not sufficient, and further improvements are possible. It has been demanded.

  The present invention has been made in view of the above reasons, and an object thereof is to provide an LED unit capable of reducing the number of parts of the LED unit while maintaining functionality, and a lighting fixture using the LED unit. It is in.

  The LED unit of the present invention includes a plate-like base, a light emitting device that uses an LED chip as a light source and is disposed on the first surface side of the base, a power supply wire that is electrically connected to the light emitting device, A holder for fixing the light emitting device and the electric wire to the base; and a translucent cover member disposed on the light emitting surface side of the light emitting device and attached to the base, and the electric wire extends from the base to the outside. The holder has a protruding portion that protrudes outward along the electric wire when viewed from the light emitting surface side.

  In this LED unit, the cover member includes a bottomed cylindrical main body portion and an annular flange portion provided on a peripheral portion of the main body portion, and the flange portion has a slit into which the protruding portion is fitted. It is preferable to have.

  In this LED unit, it is preferable that the protrusion has elasticity.

  In this LED unit, the holder may be provided with a mounting portion to be attached to the base on a virtual line segment connecting a power point received when the electric wire is displaced to the holder side and the center of the light emitting device. preferable.

  The LED unit preferably includes a decorative cover that covers the collar portion of the cover member, and the protrusion also serves as a mark when the decorative cover is attached to the cover member.

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

  In the LED unit of the present invention, the holder has a protruding portion that protrudes outward along the electric wire when viewed from the light emitting surface side, thereby reducing the number of parts of the LED unit while maintaining functionality. It becomes possible.

  In the lighting fixture of the present invention, the holder has a protruding portion that protrudes outward along the electric wire when viewed from the light emitting surface side, thereby reducing the number of parts of the LED unit while maintaining functionality. It is possible to provide a luminaire including a possible LED unit.

It is a disassembled perspective view which shows the LED unit of embodiment. It is a section explanatory view showing the LED unit of an embodiment. It is a front view which shows the LED unit of embodiment. It is a side view which shows the LED unit of embodiment. It is a rear view which shows the LED unit of embodiment. It is a bottom view which shows the LED unit of embodiment. It is another cross-sectional explanatory drawing which shows the LED unit of embodiment. It is the elements on larger scale which show the LED unit of embodiment. It is a perspective view of the front side which shows the principal part of the LED unit of embodiment. It is a perspective view of the back side which shows the principal part of the LED unit of embodiment. It is a cross-sectional perspective view which shows the other principal part of the LED unit of embodiment. It is a cross-sectional perspective view which shows the LED unit of embodiment. It is a perspective view which shows the other LED unit of embodiment. It is a perspective view which shows another LED unit of embodiment. It is a disassembled perspective view which shows another LED unit of embodiment. It is a schematic sectional drawing of the lighting fixture using the LED unit of embodiment. It is a schematic sectional drawing of the other lighting fixture using the LED unit of embodiment. It is a schematic sectional drawing of another lighting fixture using the LED unit of embodiment. It is a schematic sectional drawing of the further another lighting fixture using the LED unit of embodiment. It is a disassembled perspective view of the structural example of the lighting fixture using the LED unit of embodiment. It is a perspective view of the structural example of the lighting fixture using the LED unit of embodiment. It is a front view of the structural example of the lighting fixture using the LED unit of embodiment. It is sectional drawing of the structural example of the lighting fixture using the LED unit of embodiment. It is a schematic sectional drawing of the LED unit of a prior art example.

  Below, the LED unit 10 of this embodiment is demonstrated, referring FIG. 1 thru | or FIG. Moreover, the lighting fixture 12 provided with the LED unit 10 of this embodiment is demonstrated using FIG. 16 thru | or FIG. In addition, in the figure, the same number is attached | subjected with respect to the same member, and the overlapping description is abbreviate | omitted.

  The LED unit 10 of the present embodiment includes a plate-like base 1, a light emitting device 3 that is disposed on the first surface 1 aa side of the base 1 using an LED chip (not shown) as a light source, and the light emitting device 3 electrically. And a connected power supply wire 4. The LED unit 10 includes a holder 2 that fixes the light emitting device 3 and the electric wire 4 to the base 1, and a translucent cover member 20 that is disposed on the light emitting surface side of the light emitting device 3 and attached to the base 1. . In the LED unit 10 of the present embodiment, the electric wire 4 is led out from the base 1 (see FIG. 2). Moreover, the holder 2 has the protrusion part 2c which protrudes outward along the electric wire 4 seeing from the light emission surface side.

  The LED unit 10 of the present embodiment can change the direction in which the power supply wire 4 is led out, as in the LED unit 110 shown in FIG. 24 (see the thick arrow in FIG. 2). The LED unit 10 of the present embodiment can relieve the stress on the cover member 20 caused by the displacement of the electric wire 4 in the direction indicated by the thick arrow shown in FIG. Compared with the LED unit 110 shown in FIG. 24, the LED unit 10 of the present embodiment can reduce the number of parts by the amount that does not include the cover holding member 121 that suppresses stress applied to the cover 120 by the electric wires 4. It becomes possible.

  That is, the LED unit 10 of the present embodiment can reduce the number of parts of the LED unit 10 while maintaining functionality.

  Below, the structure of the LED unit 10 of this embodiment is demonstrated more concretely.

  The LED unit 10 of this embodiment has a disk-shaped base 1 and a spacer 6 provided on the first surface 1aa side of the base 1. The spacer 6 has a ring shape with a rectangular opening 6b therein. In the spacer 6, the outer shape of the spacer 6 is slightly smaller than the outer shape of the base 1. In the LED unit 10, the heat dissipation sheet 9 is brought into contact with the base 1 through the opening 6 b of the spacer 6. The heat dissipation sheet 9 has electrical insulation and thermal conductivity.

  In the LED unit 10, the light emitting device 3 is disposed on the heat dissipation sheet 9 on the first surface 1 aa side of the base 1. The LED unit 10 includes a power supply wire 4 that is electrically connected to the light emitting device 3, and a holder 2 that fixes the light emitting device 3 and the wire 4 to the base 1. The holder 2 includes a window hole 2 a that exposes the light emitting unit 3 a of the light emitting device 3 at the center of the holder 2. As the holder 2, for example, a bottomed cylindrical shape can be used. The holder 2 has a protrusion 2 c on the outer periphery of the holder 2. The LED unit 10 includes a translucent cover member 20 disposed on the light emitting surface side of the light emitting device 3 and attached to the base 1. The cover member 20 includes a bottomed cylindrical main body portion 20a and an annular flange portion 20b provided on the peripheral portion of the main body portion 20a.

  The base 1 can fix the light emitting device 3. In the LED unit 10 of the present embodiment, the shape of the base 1 is circular, but is not limited to this, and may be, for example, a polygonal shape or an elliptical shape. The base 1 can be formed using a base 1 made of aluminum die cast. 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 material such as copper or stainless steel, for example.

  As shown in FIG. 1, the base 1 is provided with a plurality of (two in the illustrated example) insertion holes 1 b on the periphery of the base 1. For example, as shown in FIG. 20, the insertion hole 1 b is used to insert a mounting screw 10 a from the first surface 1 aa side of the base 1 and removably attach the LED unit 10 to the fixture body 11 of the lighting fixture 12. Can do.

  The base 1 is provided with a lead-out portion 1 c on the periphery of the base 1 in order to lead the pair of electric wires 4 and 4 electrically connected to the light emitting device 3 to the outside of the LED unit 10. The lead-out part 1 c can be configured by a notch part formed in the peripheral part of the base 1. In the LED unit 10 of the present embodiment, the lead-out portion 1c has the first surface 1aa, the side surface, and the second surface 1ab of the base 1 open at the periphery of the base 1.

  The lead-out part 1c changes the direction in which the pair of electric wires 4 and 4 are led out to the outside of the LED unit 10 between the second surface 1ab side of the base 1 and the direction along the second surface 1ab of the base 1. It becomes possible. Further, when the lead-out portion 1c leads the pair of electric wires 4 and 4 led out from the lead-out portion 1c to the direction orthogonal to the second surface 1ab of the base 1, the pair of electric wires 4 and 4 are connected to the outer periphery of the base 1. It is formed so as to be arranged inside the line.

  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 part 1c to the second surface 1ab side and the side of the base 1. In the LED unit 10 of the present embodiment, when the pair of wires 4, 4 led out from the lead-out portion 1 c are led out in the direction orthogonal to the second surface 1 ab of the base 1, the pair of wires 4, 4 is the base 1. The lead-out portion 1c is formed so as to be disposed inside the outer peripheral line. Therefore, for example, when the fixture body 11 is formed in a cylindrical shape, the lighting fixture 12 can be reduced in size because the minimum diameter of the fixture body 11 can be set to the same size as the outer dimension of the base 1 of the LED unit 10. It becomes easy to plan.

  Further, as shown in FIG. 1, the base 1 is preferably formed with a chamfered portion 1 k between an inner surface 1 g of the lead-out portion 1 c of the base 1 and a first surface 1 aa of the base 1. In the LED unit 10 of this embodiment, when the chamfered portion 1k is formed on the base 1, it is possible to reduce the stress applied to each electric wire 4 when each electric wire 4 is bent toward the second surface 1ab side of the base 1. It becomes. Moreover, since the LED unit 10 can reduce the stress applied to each electric wire 4 when the electric wire 4 is bent toward the second surface 1ab side of the base 1, it is possible to prevent the electric wires 4 from being disconnected. Become. The chamfered portion 1k is a C chamfered portion, but is not limited thereto, and may be, for example, an R chamfered portion.

  The holder 2 can fix the light emitting device 3 and the electric wire 4 to the base 1. The holder 2 is configured such that a part of each electric wire 4 electrically connected to the light emitting device 3 can be stored on the first surface 1aa side of the base 1. The holder 2 can be formed in an annular shape, for example. The holder 2 can utilize an annular central portion as the window hole portion 2a. The window hole portion 2 a of the holder 2 preferably has an inner peripheral wall 2 g whose opening area gradually increases as the distance from the vicinity of the light emitting device 3 increases in the optical axis direction of the light emitting device 3. The inner peripheral wall 2g of the window hole portion 2a can prevent the light emitted from the light emitting portion 3a from being applied to the cylindrical portion 20j of the bottomed cylindrical cover member 20. Thereby, the LED unit 10 can reduce the uneven brightness of the light emitted from the side surface side of the LED unit 10.

  In the LED unit 10 of the present embodiment, the holder 2 is disposed between the base 1 and the cover member 20. The holder 2 is housed and disposed in the main body 20 a of the cover member 20. The LED unit 10 can make the holder 2 non-translucent while improving the translucency of the cover member 20. Thus, the LED unit 10 can suppress the assembly screws 23d and 23d and the electric wires 4 that the holder 2 itself fixes the holder 2 to the base 1 from being visible from the outside of the LED unit 10.

  Moreover, the LED unit 10 of this embodiment can suppress the light leaking from the lead-out part 1c by the holder 2. The LED unit 10 of the present embodiment can suppress uneven brightness caused by light leaking from the lead-out part 1c, and can also suppress a decrease in the uniformity of the light emitted from the LED unit 10.

  The holder 2 is preferably provided with a hollow portion 2b on the base 1 side for preventing interference with each electric wire 4 electrically connected to each terminal portion 3c of the light emitting device 3. The holder 2 has a plurality of (here, four) presser plate portions 2e protruding on the back surface (right surface in FIG. 2) side of the holder 2 on the base 1 side (FIG. 2 and FIG. 2). 10). The holder 2 can hold the light emitting device 3 on the base 1 side and hold it with the base 1 by the presser plate portion 2e. The holder 2 has a pressing plate portion 2e formed in a plate shape. In the LED unit 10 of the present embodiment, the shape of the holding plate portion 2e of the holder 2 is a plate shape. However, the shape is not limited to this, and may be various shapes such as a column shape. Furthermore, the holder 2 includes a mounting portion 2d for screwing the assembly screw 23d from the back side (the lower surface side in FIG. 1) of the holder 2 at a portion corresponding to each screw hole 1d of the base 1. .

  The holder 2 can be formed of, for example, a thermoplastic resin. The holder 2 can use a PBT (poly butylene terephthalate) resin as a thermoplastic resin. The holder 2 may be formed by containing a white pigment in a resin material. Moreover, the holder 2 may form a metal film on the inner peripheral wall 2g so that the light from the light emitting device 3 can be reflected by the inner peripheral wall 2g of the window hole portion 2a. Since the holder 2 has a function of reflecting light, the light from the light emitting device 3 can be effectively used.

  The holder 2 includes a protruding portion 2 c that protrudes from the outer peripheral portion 2 f of the holder 2. The protruding portion 2 c is disposed at a position corresponding to the lead-out portion 1 c of the base 1.

  By the way, when attaching the LED unit 10 to the fixture main body 11 of the lighting fixture 12, not only when the electric wire 4 is bent to the 2nd surface 1ab side of the base 1, but it may be bent to the 1st surface 1aa side. In the LED unit 10, if stress is applied to the cover member 20, the optical characteristics of light from the light emitting device 3 may change due to deformation of the cover member 20.

  The LED unit 10 of the present embodiment can suppress stress on the cover member 20 even when the electric wire 4 is bent and displaced toward the holder 2 side (see the thick arrow in FIG. 7). Since the LED unit 10 receives the bending stress of the electric wire 4 by the holder 2, it is possible to suppress the deformation of the cover member 20 and to suppress the optical influence.

  In the LED unit 10 of this embodiment, since the holder 2 has the protruding portion 2c, the cover pressing member 121 can be omitted and the number of parts can be reduced.

  Furthermore, in the LED unit 10, it is preferable that the collar part 20b of the cover member 20 has the slit 20f in which the protrusion part 2c fits. In the LED unit 10 of this embodiment, the displacement amount of the protrusion 2c can be further increased by the slit 20f. Moreover, the LED unit 10 can also align the cover member 20 by fitting the protrusion 2c into the slit 20f.

  In the holder 2, it is preferable that the protruding portion 2 c of the holder 2 has elasticity so that the stress of the electric wire 4 can be relaxed. Thereby, the LED unit 10 of this embodiment can further increase the displacement amount of the protrusion 2c. Moreover, when the protrusion 2c has elasticity, the holder 2 can suppress the deformation of the shape of the window hole 2a of the holder 2 due to the bending of the electric wire 4. Furthermore, the LED unit 10 according to the present embodiment can also prevent the protrusion 2c from being damaged even when the amount of displacement of the electric wire 4 bent toward the holder 2 is large.

  In the LED unit 10, when the electric wire 4 is bent toward the holder 2, a force may be applied in the direction of the thick arrow Z shown in FIG.

  The holder 2 is placed on a virtual line segment connecting the force point (point a in FIGS. 8 and 12) received when the electric wire 4 is displaced toward the holder 2 and the center of the light emitting device 3 (point b in FIG. 12). A mounting portion 2d to be attached to the base 1 is provided (see FIG. 10). FIG. 12 illustrates a double arrow along a virtual line segment connecting the power point received when the electric wire 4 is displaced to the holder 2 side and the center of the light emitting device 3. In the LED unit 10, the mounting portion 2 d that is attached to the base 1 is provided on a virtual line segment that connects the force point a received when the wire 4 is displaced to the holder 2 side and the center of the light emitting device 3. The bending stress 4 is not directly applied to the light emitting device 3. Thereby, the LED unit 10 of this embodiment can reduce the stress concerning the light-emitting device 3, and can improve the reliability of the LED unit 10. FIG.

  Here, when attaching the holder 2 to the base 1, first, the light emitting portion 3 a of the light emitting device 3 is exposed from the window hole portion 2 a of the holder 2, and the light emitting device 3 is sandwiched between the base 1 and the holder 2. When the LED unit 10 is assembled, the assembly screw 23d is inserted into the screw hole 1d of the base 1 from the second surface 1ab side of the base 1, and the mounting portion of the holder 2 is inserted through the screw hole 6d of the spacer 6. 2d. Thereby, in the LED unit 10, the holder 2 is attached to the base 1. In addition, the spacer 6 and the heat dissipation sheet 9 should just be arrange | positioned previously between the base 1 and the light-emitting device 3. FIG.

  The LED unit 10 of this embodiment can relieve 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. This can be suppressed.

  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 formed. 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 a plurality of LED chips, a peripheral wall portion 3e that surrounds the plurality of LED chips and reflects light from the LED chip, and a sealing portion 3d that covers the LED chips in the peripheral wall portion 3e. It is preferable. The light emitting unit 3a can use a blue LED chip as the LED chip. The light emitting unit 3a may be mixed with a translucent sealing material of the sealing unit 3d with a phosphor made of a yellow phosphor that is excited by blue light emitted from the blue LED chip and emits broad yellow light. it can. The light emitting unit 3a can constitute a white LED that obtains white light by mixing the blue light emitted from the blue LED chip and the yellow light emitted from the yellow phosphor. Here, a silicone resin, an epoxy resin, glass, etc. can be used for a translucent sealing material, for example. 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. Moreover, the light emission part 3a may comprise white LED which can light-emit white light combining a near-ultraviolet LED chip, a red fluorescent substance, a green fluorescent substance, and a blue fluorescent substance. Further, the light emitting unit 3a may constitute a white LED capable of emitting white light by combining a red LED chip, a green LED chip, and a blue LED chip.

  The mounting substrate 3b can be formed using, for example, a metal base printed wiring board. The mounting substrate 3b forms a pair of terminal portions 3c and 3c that are electrically connected to the light emitting portion 3a. Each terminal part 3c is comprised by the conductor formed in the shape of a predetermined pattern. The mounting substrate 3b is not limited to a metal base printed wiring board, and may be formed using, for example, a ceramic substrate or a glass epoxy substrate. Moreover, each terminal part 3c is electrically connected with the electric wire 4 by the junction part (not shown) which consists of solder. Here, in the LED unit 10, one electric wire 4 is connected to a terminal portion 3c (right terminal portion 3c in FIG. 1) connected to the plus side of the light emitting portion 3a. Moreover, in the LED unit 10, the other electric wire 4 is connected to the terminal part 3c (left terminal part 3c in FIG. 1) connected to the minus side of the light emitting part 3a. In addition, the mounting substrate 3b has “+” and “−” indicating polarity in the vicinity of each terminal portion 3c in order to prevent erroneous connection of the electric wires 4.

  The LED unit 10 uses a pair of lead wires that are electrically connected to the light emitting device 3 as the power supply wire 4. The LED unit 10 may be configured to appropriately include a protective cover 4d (see FIG. 13) and a covering cover 4e (see FIG. 14) that protect the lead wires.

  The mounting substrate 3b has a reflective layer (not shown) made of a white resist layer or the like covering a portion other than the light emitting portion 3a and each terminal portion 3c on the one surface (upper side in FIG. 1) side of the mounting substrate 3b. It is preferable. The reflective layer can suppress the light emitted from the light emitting unit 3a from being absorbed by the mounting substrate 3b.

  Moreover, it is preferable that the light-emitting device 3 arrange | positions the thermal radiation sheet | seat 9 between the other surface (lower surface of FIG. 1) of the mounting substrate 3b, and the 1st surface 1aa side of the base 1. FIG. The LED unit 10 can efficiently dissipate the heat generated in 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, when the base 1 is made of aluminum having higher thermal conductivity than the resin, the heat generated in the light emitting device 3 is radiated to the appliance body 11 side through the heat radiating sheet 9 and the base 1. It becomes possible to do.

  In the LED unit 10, the spacer 6 is fixed to the first surface 1aa of the base 1. In the LED unit 10, the heat radiation sheet 9 is placed on the first surface 1aa of the base 1 so as to cover the opening 6 b of the spacer 6. The spacer 6 includes a step portion 6g that is recessed from the surface 6aa of the spacer 6 and protrudes toward the opening 6b. The spacer 6 enables the outer peripheral portion of the heat dissipation sheet 9 to be placed on the stepped portion 6g. The step portion 6g has an inclined surface on the surface of the step portion 6g. In other words, the light emitting device 3 is arranged such that the heat dissipation sheet 9 is interposed between the light emitting device 3 and the base 1. The outer peripheral portion of the heat radiating sheet 9 is disposed so that the step portion 6 g of the spacer 6 is interposed between the heat radiating sheet 9 and the base 1.

  The LED unit 10 includes a heat radiating sheet 9 interposed between the base 1 and the light emitting device 3 before the light emitting device 3 and the heat radiating sheet 9 are sandwiched between the base 1 and the holder 2 in an assembly process of the LED unit 10 or the like. It is possible to grasp the positional deviation of the. Moreover, even if a vibration etc. are added to the LED unit 10 in the middle of the assembly of the LED unit 10, the LED unit 10 can suppress the displacement of the heat dissipation sheet 9 from the spacer 6 by the step portion 6 g.

  The spacer 6 may be configured integrally with the base 1 or may be configured separately. When the spacer 6 is configured separately from the base 1, the spacer 6 can be formed of, for example, a thermoplastic resin. For the spacer 6, for example, a PBT resin can be used as the thermoplastic resin. By forming the spacer 6 from a resin material, a complicated shape can be formed relatively easily.

  The step portion 6g provided in the spacer 6 may be appropriately set in the shape, width and depth of the step portion 6g in accordance with the thickness of the heat dissipation sheet 9 and the size and shape of the light emitting device 3. The step portion 6g 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 step portion 6g within a range of 0.3 to 0.5 mm. The heat radiating sheet 9 has a size that covers the stepped portion 6g, and may be placed on a region where the heat radiating sheet 9 is to be provided.

  The spacer 6 is formed with a screw hole portion 6d into which an assembly screw 23d for attaching the holder 2 to the base 1 is screwed. The screw hole portion 6d is provided in the central portion in the longitudinal direction along the side in the longitudinal direction in the opening 6b of the spacer 6.

  The spacer 6 has a first rib 1ha, a second rib 1hb, a third rib 1hc, and a fourth rib 1hd that sandwich each of the pair of electric wires 4, 4 on the lead-out portion 1c side (left side in FIG. 1). It protrudes from the surface 6aa of the spacer 6. More specifically, the spacer 6 has the first rib 1ha and the third rib 1hc on the surface on the lead-out portion 1c side so that one electric wire 4 can be sandwiched between the first rib 1ha and the third rib 1hc. It protrudes from 6aa. The spacer 6 has the second rib 1hb and the fourth rib 1hd protruding from the surface 6aa on the lead-out portion 1c side so that the other electric wire 4 can be sandwiched between the second rib 1hb and the fourth rib 1hd. Yes.

  The LED unit 10 of the present embodiment holds the electric wires 4 electrically connected to the light-emitting device 3 in the spacer 6, thereby preventing the tension of the pair of electric wires 4 and 4 without adding another part. Can be given. 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, stress is added to the junction part (not shown) of each electric wire 4 and each terminal part 3c of the light-emitting device 3. FIG. It is possible to suppress disconnection due to the action.

  Moreover, it is preferable that the spacer 6 is provided with the inclined surface 6k between surface 6aa of the spacer 6. FIG. In the LED unit 10 of the embodiment, since the inclined surface 6k is formed on the spacer 6, the stress applied to the electric wire 4 when each electric wire 4 is bent toward the second surface 1ab side of the base 1 can be further reduced. it can.

  The heat dissipation sheet 9 can efficiently conduct heat from the light emitting device 3 to the base 1 side. As the heat dissipation sheet 9, it is preferable to use a silicone gel sheet using a silicone resin made of a gel-like elastomer material which is gel-like, has a low crosslinking density and is soft and elastic. Although the heat dissipation sheet 9 uses a silicone gel sheet, any material having excellent electrical insulation and thermal conductivity may be used. The heat dissipation sheet 9 is preferably made of a soft elastomer material having electrical insulation and thermal conductivity. For example, an acrylic resin material can be used for the heat dissipation sheet 9 as an elastomer material. Moreover, the heat radiating sheet 9 may be provided with adhesiveness and function as an adhesive sheet.

  The cover member 20 can protect the light emitting device 3. The cover member 20 has translucency that allows the light emitted from the light emitting device 3 to pass through efficiently. The cover member 20 can be formed of a light transmissive material such as an acrylic resin, an epoxy resin, a silicone resin, or glass. The cover member 20 has a bottomed cylindrical shape as a whole, as shown in FIG. The cover member 20 is open on the base 1 side, is disposed on the inner side of the outer peripheral line of the base 1 and covers the light emitting device 3, and has a bottomed cylindrical main body 20 a that extends outward from the opening end of the main body 20 a. And has a flange 20b for attaching the cover member 20 to the base 1. In addition, as for the main-body part 20a, the whole main-body part 20a is equipped with translucency. The main body portion 20a is formed in a circular shape that closes one end side far from the base 1, and emits light from the light emitting device 3 to the outside, and a cylinder formed so as to be smoothly continuous with the light emitting portion 20h. It can comprise with the shape part 20j. The main body portion 20a is formed so that the light emitting portion 20h and the cylindrical portion 20j have substantially the same thickness. The cylindrical portion 20j is formed in a tapered cylindrical shape in which the inner diameter gradually decreases from the opening end portion side to the one end portion side.

  The cover member 20 may have a lens function for condensing or diffusing light from the light emitting device 3.

  In the LED unit 10 including the cover member 20, the emission angle of light emitted from the light emitting device 3 to the inner surface side of the cover member 20 is different. Therefore, on the side surface side of the LED unit 10, for example, mainly by light emitted through the light emitting portion 20 h of the cover member 20, mainly by light emitted through the cylindrical portion 20 j of the cover member 20. Diffracted light may be emitted. Here, in the bottomed cylindrical cover member 20 having translucency, the optical path length of the light transmitted through the cover member 20 depends on the emission angle of the light emitted from the light emitting device 3 to the inner surface side of the cover member 20. It depends on 20 sites. Moreover, even if the cover member 20 has translucency, light absorption or scattering occurs.

  Therefore, a difference in brightness may occur in the light emitted from the side surface side of the LED unit 10. If the LED unit 10 has uneven brightness on the side surface side of the LED unit 10, it may cause a decrease in uniformity.

  The LED unit 10 can also suppress the occurrence of uneven brightness on the side surface side of the LED unit 10 by the holder 2 due to light from the light emitting device 3 emitted through the cover member 20.

  The LED unit 10 of the present embodiment suppresses intrusion of moisture, impurities, and the like into the LED unit 10 by sealing the base 1 side and the cover member 20 with a sealing material (not shown). It can be configured. In the LED unit 10 of this embodiment, a silicone resin is suitably used as the material for the sealing material, but other resin materials such as an epoxy resin and a urethane resin may be used. The LED unit 10 of the present embodiment can have a structure in which a cover member 20 that transmits light emitted from the light emitting device 3 is attached to the base 1 with a sealing material.

  In the LED unit 10 of the present embodiment, the flange portion 20 b of the cover member 20 covers and fixes the base 1. Moreover, since the LED unit 10 can attach the cover member 20 to the base 1 without using a screw, there is no concern about loosening of the screw. The method for attaching the cover member 20 to the base 1 is not particularly limited, and for example, the cover member 20 may be attached to the base 1 using an assembly screw or the like.

  In addition, the flange part 20b of the cover member 20 is a semicircle which inserts the attachment screw 10a from the one surface side (upper surface side in FIG. 1) to the part corresponding to each insertion hole 1b of the base 1. It is preferable to have a first cutout portion 20c. Therefore, the LED unit 10 of this embodiment can attach the base 1 to the fixture main body 11 of the lighting fixture 12 from the cover member 20 side so that attachment or detachment is possible.

  In the LED unit 10 of this embodiment, it is preferable to provide the decorative cover 21 which covers the collar part 20b of the cover member 20. As shown in FIGS. 15, 20, 21, and 22, the LED unit 10 can prevent the mounting screws 10 a and 10 a from being seen through the cover member 20 by the decorative cover 21, thereby improving the appearance design. It becomes possible.

  In the LED unit 10 of the present embodiment, the protrusion 2c can also serve as a mark when the decorative cover 21 is attached to the cover member 20 (see FIG. 15). As shown in FIG. 20, the decorative cover 21 preferably includes a mark such as an arrow for positioning with the cover member 20.

  That is, in the LED unit 10, since the protruding portion 2 c is exposed from the slit 20 f, the protruding portion 2 c can be used as a mark when the decorative cover 21 is attached to the cover member 20. In the LED unit 10 of this embodiment, when the electric wire 4 is bent and cannot be seen from the front side, it is possible to improve assembly workability by having a mark.

  The decorative cover 21 is preferably formed of a non-translucent material. For the decorative cover 21, for example, a metal such as aluminum, a white opaque resin, or the like can be used as a non-translucent material. The decorative cover 21 is preferably formed in a flat annular shape so as not to obstruct light emitted from the light emitting device 3 and emitted from the outer peripheral surface of the main body 20a of the cover member 20 as much as possible. The decorative cover 21 can be a circular ring as a flat ring.

  In the LED unit 10, the decorative cover 21 can reduce the number of elements that obstruct the desired light distribution and uniformity of the light emitted from the outer peripheral surface of the main body 20 a of the cover member 20.

  By the way, it is preferable that the LED unit 10 is provided with the 1st connector 4a 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. 16, the first connector 4 a is detachably connected to the second connector 14 on the power supply unit 15 side provided at the tip of the power supply line 13 electrically connected to the power supply unit 15. Is possible.

  Therefore, the LED unit 10 of the present embodiment is provided with the first connector 4a that can be detachably connected to the second connector 14 on the power supply unit 15 side at the distal ends of the pair of electric wires 4 and 4. Connection work when attaching and detaching the unit 10 can be easily performed. In addition, the LED unit 10 is provided with the first 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 member 20 side. . Thereby, the user can replace the LED unit 10 relatively easily.

  Below, the assembly process of the above-mentioned LED unit 10 is demonstrated.

  First, a rectangular heat radiation sheet 9 larger than the opening 6b is placed on the step 6g of the opening 6b provided in the spacer 6 provided on the first surface 1aa side of the base 1. In the LED unit 10 of the present embodiment, the heat dissipation sheet 9 is formed in a rectangular shape that is slightly larger than the opening 6 b of the spacer 6. The LED unit 10 has the stepped portion 6g as an opening so that the stepped portion 6g is exposed when the position of the heat dissipation sheet 9 is shifted from the tolerance in each direction in the longitudinal direction or the short direction in the opening 6b of the spacer 6. 6b is formed on each of the four sides. In the assembly process of the LED unit 10, after the heat radiation sheet 9 is placed on the stepped portion 6 g, the assembly process is performed by, for example, an appearance inspection apparatus including an imaging device such as a CCD camera and an image processing device or an appearance inspection such as visual inspection. It is possible to make a pass / fail judgment at.

  Next, in the assembly process of the LED unit 10, the light emitting device 3 is placed on the heat dissipation sheet 9.

  Subsequently, each electric wire 4 is sandwiched between the first rib 1ha and the third rib 1hc of the spacer 6 or between the second rib 1hb and the fourth rib 1hd, and the electric wire 4 and the terminal portion 3c of the mounting substrate 3b Are electrically connected.

  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 screw 23d. In the LED unit 10, the base 1, the spacer 6, and the holder 2 are fixed by screwing of the assembly screw 23 d.

  Then, the cover member 20 is fitted by fitting the cover member 20 and the protrusion 2c of the holder 2 together by aligning the positions of the protrusion 2c protruding from the peripheral portion of the holder 2 and the slit 20f provided in the cover member 20. Arranged on the base 1 side. In addition, the LED unit 10 can fix the cover member 20 to which the non-hardened sealing material used as a sealing material was made to adhere with a dispenser to the base 1 side.

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

  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 (for example, copper etc.) other than aluminum. Further, the material of the instrument body 11 may be a material other than metal (for example, ceramics).

  The instrument body 11 is configured so that the LED unit 10 can be detachably attached. If it demonstrates concretely, the instrument main body 11 will form the attachment screw hole (not shown) which screws the attachment screw 10a in the site | part corresponding to each of each insertion hole 1b of the base 1. As shown in FIG.

  The lighting fixture 12 having the configuration shown in FIG. 16 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 body portion 11a in which the LED unit 10 is housed and arranged, and an outer flange portion 11b extending outward from the opening of the 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. Note that the lighting fixture 12 may be provided with a mounting spring (not shown) in the fixture body 11 that holds the peripheral portion of the embedding hole 17a in the ceiling member 17 between the lighting fixture 12 and the outer casing 11b.

  The appliance main body 11 is provided with a storage arrangement portion 11e that stores and arranges the power supply unit 15 above the bottom portion 11c of the appliance main body 11. The instrument main body 11 is arranged with the power supply unit 15 separated 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.

  In addition, the instrument body 11 is provided with a lead hole (not shown) in the bottom portion 11c for drawing out the electric wire 4 and the first connector 4a led out from the LED unit 10 into the storage arrangement portion 11e.

  The lighting fixture 12 having the configuration shown in FIG. 17 is, for example, a spotlight in which the fixture body 11 is held by a holder 19 that is fixed to the ceiling material 17 and holds the fixture body 11. 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.

  The appliance main body 11 is provided with a lead hole (not shown) in the bottom portion 11c for drawing out the electric wire 4 and the first connector 4a led out from the LED unit 10 into the appliance main body 11. In addition, a diffusion plate 22 that diffuses and transmits light emitted from the cover member 20 of the LED unit 10 is attached to the bottom 11 c of the appliance main body 11 so as to cover the LED unit 10.

  Moreover, the lighting fixture 12 of the structure shown in FIG. 18 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 member 20 of the LED unit 10 is attached to the instrument body 11 so as to cover the LED unit 10.

  The LED unit 10 in the lighting fixture 12 having the configuration shown in FIGS. 16 to 18 described above includes a pair of electric wires 4 and 4 from the lead-out portion 1c of the base 1 to the second surface of the base 1 as shown by broken lines in FIG. Derived to the 1ab side (right side in FIG. 2).

  The lighting fixture 12 having the configuration shown in FIG. 19 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 member 17. The lighting fixture 12 having the configuration shown in FIG. 19 includes a diffusion plate 22 that diffuses and transmits light emitted from the cover member 20 of the LED unit 10. 19, the LED unit 10 in the luminaire 12 having the configuration shown in FIG. 19 has a pair of electric wires 4 and 4 from the lead-out portion 1c of the base 1 to the side of the base 1 (see FIG. 2). Let's derive to the lower side. By the way, as the lighting fixture 12 using the LED unit 10 of this embodiment, it can also be set as the structure shown in FIG. 20 thru | or FIG. The lighting fixture 12 of FIG. 20 is provided with the fixture main body 11 to which the LED unit 10 is detachably attached as in FIG. 16, and is different in that the power supply unit 15 is not provided. In any case, the lighting fixture 12 can be a lighting fixture including the LED unit 10 that can be attached to the fixture main body 11 in various forms.

DESCRIPTION OF SYMBOLS 1 Base 1aa 1st surface 2 Holder 2c Protrusion part 2d Attachment part 3 Light-emitting device 4 Electric wire 10 LED unit 11 Appliance main body 12 Lighting fixture 20 Cover member 20a Main body part 20b Saddle part 20f Slit 21 Cosmetic cover

Claims (6)

A plate-shaped base, a light emitting device arranged on the first surface side of the base using an LED chip as a light source, a power supply wire electrically connected to the light emitting device, the light emitting device and the electric wire A holder that is fixed to the base, and a translucent cover member that is disposed on the light emitting surface side of the light emitting device and attached to the base;
The LED unit, wherein the electric wire is led out from the base, and the holder has a protruding portion that protrudes outward along the electric wire when viewed from the light emitting surface side.   The cover member includes a bottomed cylindrical main body portion and an annular flange portion provided on a peripheral portion of the main body portion, and the flange portion has a slit into which the protruding portion is fitted. The LED unit according to claim 1.   The LED unit according to claim 1, wherein the protrusion has elasticity.   The said holder is provided with the attaching part attached to the said base on the virtual line segment which connects the power point received when the said electric wire moves to the said holder side, and the center of the said light-emitting device. The LED unit according to any one of claims 1 to 3.   5. The apparatus according to claim 1, further comprising a decorative cover that covers a collar portion of the cover member, wherein the projecting portion also serves as a mark when the decorative cover is attached to the cover member. LED unit of description.   A lighting fixture comprising: the LED unit according to any one of claims 1 to 5; and a fixture main body to which the LED unit is attached.

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