JP2014179223A - Light source for illumination and lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source for illumination which is efficiently produced and exhibits improved heat radiation performance.SOLUTION: An LED unit 1 includes: a mounting substrate 20 on which a light emitting element for emitting light forward is provided; a body part 5 including a support base 40 disposed at the rear side of the mounting substrate 20 and a housing 10 which is disposed so as to sandwich the mounting substrate 20 with the support base 40 in a fore-and-aft direction; and a coupling member 50 which couples the support base 40 and the housing 10 overlapped with each other in the fore-and-aft direction. The coupling member 50 includes an elastic part 51 which contacts with a head part 251 of a screw 250 from the rear side thereby applying a biasing force to the head part 251 when the LED unit 1 is attached to a lighting device.

Description

  The present invention relates to an illumination light source in which a light emitting element such as an LED is used as a light source, and an illumination device including the illumination light source.

  2. Description of the Related Art Conventionally, an LED lamp, which is a disk-shaped or flat-shaped illumination light source using a light emitting diode (LED) as a light source, has been proposed (for example, see Patent Document 1).

  Such an LED lamp generally includes a substrate (mounting substrate) on which a light emitting element is mounted, a support base that supports the mounting substrate, and a housing. The LED lamp is fixed to the lighting fixture by tightening the housing together with screws.

US Patent Application Publication No. 2012/0236532

  Here, the LED has a characteristic that the temperature rises due to heat generated by light emission, and as a result, the light emission efficiency of the LED decreases. For this reason, measures for heat dissipation of the mounting board are important.

  Therefore, in the LED lamp, what structure should be adopted in order to efficiently dissipate the heat from the mounting substrate becomes a problem. In addition, from the viewpoint of production efficiency or production cost of LED lamps, it is desirable to adopt a structure that is as simple as possible and has a high heat dissipation effect.

  An object of the present invention is to provide an illumination light source that can be efficiently produced and has improved heat dissipation, and an illumination device including the illumination light source in consideration of the above-described conventional problems.

  In order to achieve the above object, an illumination light source according to one embodiment of the present invention is an illumination light source attached to a lighting fixture using an attachment member, and a substrate provided with a light emitting element that emits light forward A support base disposed behind the substrate, a main body having a casing disposed so as to sandwich the substrate in the front-rear direction with the support base, and the support base and the casing. A coupling member that overlaps and couples in the front-rear direction, and the coupling member is a protrusion projecting in a direction that intersects the front-rear direction of the attachment member when the illumination light source is attached to the lighting fixture. It has an elastic part which gives urging force to the above-mentioned projection part by contacting from the back.

  Moreover, the illumination light source which concerns on 1 aspect of this invention WHEREIN: The said main-body part may have the attachment hole which the said attachment member penetrates, and the said coupling member is arrange | positioned in the vicinity of the said attachment hole.

  Further, in the illumination light source according to one aspect of the present invention, the coupling member is formed in a contact portion that is a portion of the housing that is in contact with an outer surface parallel to a direction intersecting the front-rear direction. The attachment member may have a through-hole, and the elastic portion may be formed in the contact portion.

  In the illumination light source according to one aspect of the present invention, the elastic portion may be provided integrally with the coupling member.

  In the illumination light source according to one aspect of the present invention, the elastic portion includes a flat portion extending in a direction intersecting the front-rear direction in front of the outer surface of the housing, and the housing from the flat portion. It may have a protrusion protruding in the direction of the outer surface of the body.

  Moreover, the illumination light source which concerns on 1 aspect of this invention WHEREIN: The said coupling member is good also as having the convex part which protrudes in the said front-back direction and engages with the engaging part provided in the said main-body part in the concave shape.

  In order to achieve the above object, an illumination device according to one embodiment of the present invention is provided with the illumination light source according to any one of the above embodiments and the illumination light source, and supplies power to the illumination light source. Lighting fixtures.

  ADVANTAGE OF THE INVENTION According to this invention, the illuminating device provided with the light source for illumination which can be produced efficiently and whose heat dissipation was improved, and the said light source for illumination can be provided.

External perspective view of LED unit according to Embodiment 1 Plan view of LED unit according to Embodiment 1 The rear view of the LED unit concerning Embodiment 1 1 is an exploded perspective view of an LED unit according to Embodiment 1. FIG. 1 is an external perspective view of a coupling member according to Embodiment 1. FIG. Plan view of coupling member according to Embodiment 1 Sectional drawing of the coupling member 50 in the AA 'line of FIG. 4B Sectional drawing of the coupling member 50 in the BB 'line | wire of FIG. 4B 1st perspective view which shows the mode of attachment to the main-body part of the coupling member which concerns on Embodiment 1. FIG. 2nd perspective view which shows the mode of attachment to the main-body part of the coupling member which concerns on Embodiment 1. FIG. Sectional drawing which shows the mode of attachment to the main-body part of the coupling member which concerns on Embodiment 1. FIG. Partial sectional view of the LED unit fixed to the lighting fixture with a screw External perspective view of a coupling member according to Modification 1 of Embodiment 1 Sectional drawing which shows the structure of the coupling member which concerns on the modification 2 of Embodiment 1. FIG. Sectional drawing which shows the structure outline | summary of the illuminating device which concerns on Embodiment 2. FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an illumination light source and an illumination device according to embodiments of the present invention will be described with reference to the drawings. Each figure is a schematic diagram and is not necessarily illustrated exactly.

  Each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement positions, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements not described in the independent claims are described as arbitrary constituent elements.

  In the following Embodiment 1, an LED unit (LED lamp) will be described as an example of an illumination light source.

(Embodiment 1)
First, a schematic configuration of the LED unit 1 according to Embodiment 1 of the present invention will be described with reference to FIGS.

  FIG. 1 is an external perspective view of an LED unit 1 according to Embodiment 1. FIG.

  FIG. 2A is a plan view of LED unit 1 according to Embodiment 1. FIG.

  2B is a rear view of the LED unit 1 according to Embodiment 1. FIG.

  FIG. 3 is an exploded perspective view of the LED unit 1 according to the first embodiment.

  In FIGS. 1 and 3, the side from which light is extracted from the LED unit 1 (hereinafter referred to as the light irradiation side) is illustrated as being on the upper side. In the following description, the light irradiation side is the front side (front), the opposite side to the light irradiation side is the rear side (rear), and the direction intersecting the front-rear direction is the side.

  That is, the front-rear direction in the LED unit 1 is a direction parallel to the Z axis in the present embodiment, and the side in the LED unit 1 is a direction parallel to the XY plane in the present embodiment.

  Further, in FIG. 3, in order to clearly illustrate the arrangement of the housing 10 and the support base 40, other components such as wiring in the housing 10 are not illustrated.

  As shown in these drawings, the LED unit 1 is an illumination light source having a circular shape and a flat shape, and is an apparatus that irradiates light by being attached to a lighting fixture (not shown in FIGS. 1 to 3). is there.

  Specifically, the LED unit 1 is an LED lamp having an outer diameter of 30 mm to 150 mm and a height of about 10 mm to 30 mm, for example.

  The LED unit 1 in the present embodiment includes a main body 5 having a housing 10 and a support base 40, and a mounting substrate 20.

  The casing 10 is a casing having an outer shape that is disposed on the light irradiation side (front) of the LED unit 1. The housing 10 has openings at the front and rear, and is connected to the support base 40 at the rear.

  Further, the mounting substrate 20 is disposed between the housing 10 and the support base 40. That is, the housing 10 is disposed so as to sandwich the mounting substrate 20 in the front-rear direction with the support base 40. In the present embodiment, the main body 5 is constituted by the support base 40 and the housing 10.

  In the present embodiment, the annular member 18 is disposed between the housing 10 and the mounting substrate 20. Specifically, the annular member 18 is formed of a material having elasticity such as rubber, and is disposed between the housing 10 and the mounting substrate 20 so as to surround the light emitting portion 21 of the mounting substrate 20. .

  The annular member 18 has elasticity, and functions as a member that presses the mounting substrate 20 against the support base 40 in a state where the housing 10 and the support base 40 are coupled. Further, since the annular member 18 is disposed so as to close the gap between the opening periphery of the housing 10 and the mounting substrate 20, foreign matters (dust, moisture, etc.) enter the housing 10 from the opening. It functions also as a member which suppresses.

  The housing 10 is formed of a resin housing made of a synthetic resin having insulation properties such as PBT (polybutylene terephthalate).

  The main body portion 5 includes insertion holes 22 a and 22 b and two release holes 15.

  Each of the insertion holes 22a and 22b is a hole through which the end of the conductive member is inserted from the outside to the inside of the main body 5, and is provided on the side surface of the housing 10 in the present embodiment.

  More specifically, insertion holes 22 a and 22 b are provided in the radial surface of the lead wire mounting portion 22 protruding in the radial direction of the housing 10.

  In the present embodiment, the end portion of the lead wire 122a extending from the lighting fixture is inserted into the insertion hole 22a, and the end portion of the lead wire 122b similarly extending from the lighting fixture is inserted into the insertion hole 22b.

  The end portions of the lead wires 122a and 122b are detachably held by a holding portion 30 (not shown in FIG. 3) disposed inside the housing 10. That is, power necessary for light emission of the light emitting unit 21 is supplied to the mounting substrate 20 through the holding unit 30.

  The main body 5 further includes recesses 12 and 13 provided in a recessed shape from the front surface 10a which is the front surface of the housing 10 (see, for example, FIG. 3).

  In the present embodiment, the coupling member 50 is fitted from the outside into each of the three recesses 12 arranged along the outer periphery of the housing 10.

  The coupling member 50 is a member that overlaps and couples the support base 40 and the housing 10 in the front-rear direction. In the present embodiment, the outer surface (front surface 10a) parallel to the front-rear direction of the housing 10 is in contact with the mounting member (for example, the screw 250) for mounting the LED unit 1 on the lighting fixture. It has an elastic part which gives energizing force of the direction which goes to the front from.

  The structure and function of the coupling member 50 in the first embodiment will be described later with reference to FIGS. 4A to 9.

  A mounting hole 12a (13a) through which a screw 250 for mounting the LED unit 1 to a lighting fixture passes is formed on the bottom surface of each recess 12 (13).

  For example, the LED unit 1 is screwed to the luminaire using the mounting holes 12a of the three recesses 12 arranged along the outer periphery of the housing 10.

  More specifically, as shown in FIG. 3, it is attached to the lighting fixture by a screw 250 that penetrates the through hole provided in the coupling member 50 and the attachment hole 12 a. The screw 250 is an example of an attachment member, and has a head portion 251 and a shaft portion 252. The head 251 is an example of a protruding portion that protrudes in a direction that intersects the front-rear direction.

  It should be noted that the housing 10 may be screwed to the luminaire using the mounting holes 13a of the two recesses 13 arranged inside the three recesses 12. In either case, the head of each screw is accommodated inside the recess 12 or 13.

  Here, the three recesses 12 (attachment holes 12a) and the two recesses 13 (attachment holes 13a) are provided in order to make the LED unit 1 correspond to both the three-point stopper and the two-point stopper. Therefore, the main body 5 may not include, for example, the two recesses 13.

  The mounting substrate 20 is a substrate provided with one or more light emitting elements such as semiconductor light emitting elements. The mounting substrate 20 is, for example, a rectangular flat substrate, and has a main surface on which the light emitting element is mounted and a back surface connected to the support base 40.

  Further, the mounting substrate 20 is preferably made of a material having high thermal conductivity, for example, an alumina substrate made of alumina.

  As the mounting substrate 20, in addition to the alumina substrate, other ceramic substrates such as aluminum nitride, metal substrates such as aluminum and copper, resin substrates, or metal base substrates having a laminated structure of metal and resin, etc. May be used. Further, as the mounting substrate 20, not a rigid substrate but a flexible substrate or a rigid flexible substrate may be adopted.

  Further, when a resin substrate is employed as the mounting substrate 20, for example, a resin substrate made of a high thermal conductive resin containing an inorganic filler may be employed.

  The mounting substrate 20 is provided with a light emitting unit 21 having one or more light emitting elements that emit light forward.

  Specifically, the light emitting unit 21 includes one or more LED chips 21a (see FIG. 3) mounted on the mounting substrate 20 and a sealing member. The LED chip 21a is an example of a light emitting element, and is mounted on the main surface of the mounting substrate 20 by die bonding or the like.

  Further, in the present embodiment, the sealing member collectively seals the plurality of LED chips 21a arranged in a matrix.

  As the LED chip 21a, for example, a blue LED chip that emits blue light having a center wavelength of 440 nm to 470 nm is used.

  Moreover, as a sealing member, while sealing LED chip 21a and protecting LED chip 21a, fluorescent substance containing resin comprised by the resin containing the fluorescent substance which carries out wavelength conversion of the light from LED chip 21a is illustrated. The

  Specifically, for example, when the LED chip 21a is a blue LED as a sealing member, YAG (yttrium, aluminum, garnet) -based yellow phosphor particles are dispersed in a silicone resin in order to obtain white light. A phosphor-containing resin can be used. Thereby, white light is emitted from the light emitting part 21 (sealing member) by yellow light wavelength-converted by the phosphor particles and blue light from the blue LED chip 21a.

  Moreover, the outer diameter of the light emission part 21 is 5-50 mm, for example, and when the LED unit 1 is a 20W type LED lamp, the outer diameter of the light emission part 21 is 20 mm, for example.

  In addition, in this Embodiment, although the circular light emission part 21 was illustrated, the whole shape of the light emission part 21 is not limited to a round shape. For example, a square shape may be adopted as the overall shape of the light emitting unit 21.

  Moreover, there is no limitation in particular in the aspect of sealing the some LED chip 21a by a sealing member. For example, the plurality of LED chips 21a may be individually sealed, and the plurality of LED chips 21a may be sealed for each line.

  In addition, when it is not necessary to convert the wavelength of light from the LED chip 21a, one or more LED chips 21a disposed on the mounting substrate 20 may not be sealed with the sealing member.

  The support base 40 is a pedestal to which the mounting board 20 is attached, and is disposed on the opposite side (rear side) of the mounting board 20 to the light irradiation side.

  Examples of the material of the support base 40 include a metal such as aluminum, a high thermal conductive resin containing an inorganic filler, and ceramics.

  Further, when a material having high thermal conductivity such as aluminum is adopted as the material of the support base 40, the support base 40 can efficiently transfer the heat of the mounting substrate 20 to the lighting fixture. That is, the support base 40 can also function as a heat radiator that dissipates heat generated in the mounting substrate 20.

  When a conductive material is used as the material for the support base 40, an insulating member is provided between the support base 40 and the mounting board 20 for electrical insulation between the support base 40 and the mounting board 20. Be placed.

  In addition, a heat conductive heat conducting member for releasing heat from the mounting board 20 to the lighting fixture side may be disposed on the front surface or the back surface 40a of the support base 40. As the heat conducting member, for example, a rubber or resin sheet such as a silicon sheet or an acrylic sheet, a liquid member such as grease, or the like can be considered.

  Here, in the present embodiment, as described above, the annular member 18 having elasticity is disposed between the mounting substrate 20 and the housing 10. Further, the support base 40 and the housing 10 are overlapped and connected in the front-rear direction by the connecting member 50.

  Specifically, the support base 40 and the casing 10 are coupled by the peripheral edge of the support base 40 and the peripheral edge of the casing 10 being sandwiched between the coupling members 50.

  That is, the casing 10 is coupled to the support base 40 in a state where the mounting substrate 20 is pressed against the support base 40 by being coupled to the support base 40 by the coupling member 50. At this time, since the elastic annular member 18 is between the housing 10 and the mounting substrate 20, the housing 10 presses the mounting substrate 20 to the support base 40 more reliably and more uniformly. Can do.

  Here, since the lighting fixture is connected to the back surface 40 a of the support base 40, it is generally desirable not to protrude a screw tip or a member such as a nut from the back surface 40 a of the support base 40.

  In addition, when a substrate with poor deformability, such as a ceramic substrate, is used as the mounting substrate 20, there is a possibility that the mounting substrate 20 may be cracked due to a tightening force by a screw.

  Therefore, an adhesive is generally used for joining the mounting substrate 20 and the support base 40.

  In this case, it is necessary to apply an adhesive to at least one of the back surface of the mounting substrate 20 and the front surface of the support base 40 and overlap the mounting substrate 20 and the support base 40, and then wait until the adhesive is dried.

  However, the LED unit 1 of the present embodiment has the above-described configuration, so that the mounting substrate 20 and the support base 40 can be stably fixed in the LED unit 1 without using an adhesive. . That is, the waiting time for drying the adhesive is not necessary, and the plurality of LED units 1 can be produced sequentially and efficiently.

  Further, the presence of the elastic annular member 18 allows the mounting board 20 to be more reliably and more uniformly pressed against the support base 40, so that heat generated in the mounting board 20 is efficiently transmitted to the support base 40. can do.

  The coupling member 50 according to the first embodiment, which is a component that produces such an effect, will be described with reference to FIGS. 4A to 9.

  4A is an external perspective view of the coupling member 50 according to Embodiment 1. FIG.

  4B is a plan view of the coupling member 50 according to Embodiment 1. FIG.

  FIG. 5A is a cross-sectional view of the coupling member 50 taken along the line AA ′ of FIG. 4B.

  FIG. 5B is a cross-sectional view of the coupling member 50 taken along line BB ′ of FIG. 4B.

  As shown in FIGS. 4A to 5B, the coupling member 50 in the first embodiment has an elastic part 51.

  Specifically, the coupling member 50 includes a first abutting portion 54a that abuts the outer surface of the housing 10 parallel to the direction intersecting the front-rear direction. In the present embodiment, four elastic portions 51 are provided in the first contact portion 54a. Further, the coupling member 50 has a second contact portion 54 b that contacts the outer surface of the support base 40.

  Further, the coupling member 50 further includes a through hole 53 through which the shaft portion 252 of the screw 250 passes. Four elastic portions 51 are provided along the periphery of the opening on the front side of the through-hole 53, that is, along the periphery of the opening formed in the first contact portion 54a.

  Each elastic part 51 has a shape protruding obliquely forward (obliquely upward in 5A and 5B) from the flat plate-like first contact part 54a.

  The coupling member 50 is made of a material having a predetermined rigidity and elasticity such as metal or resin. Therefore, when these elastic portions 51 are pressed from the front toward the rear from a certain object, each of the elastic portions 51 acts to push back the object with an elastic force (restoring force).

  In the present embodiment, as shown in FIG. 3, the head 251 of the screw 250 presses each elastic portion 51 toward the rear, so that the head 251 of the screw 250 has a front from each elastic portion 51. The urging power toward is given.

  The coupling member 50 can be obtained, for example, by punching and bending a sheet metal. In addition, a plurality of structures obtained by resin injection molding are connected by welding, whereby the coupling member 50 can be produced.

  In the present embodiment, the elastic portion 51 is provided integrally with the coupling member 50. However, the elastic portion 51 may be provided in the coupling member 50 as a separate body from the main body portion of the coupling member 50. .

  Further, the first abutting portion 54a of the coupling member 50 is provided with a convex portion 56a protruding in the front-rear direction. Similarly, the second contact portion 54b is provided with a convex portion 56b.

  Each of the convex portions 56a and 56b engages with an engaging portion provided in a concave shape in the main body portion 5 (the housing 10 and the support base 40). As a result, the coupling member 50 attached to the main body 5 is prevented from coming off (detaching) from the main body 5.

  FIG. 6 is a first perspective view showing how the coupling member 50 according to Embodiment 1 is attached to the main body 5.

  FIG. 7 is a second perspective view showing how the coupling member 50 according to Embodiment 1 is attached to the main body 5.

  FIG. 8 is a cross-sectional view showing how the coupling member 50 according to Embodiment 1 is attached to the main body 5.

  As shown in FIGS. 6 to 8, in a state where the mounting substrate 20 is sandwiched between the housing 10 and the support base 40, the coupling member 50 is inserted into the concave portion 12 of the housing 10 from the side of the housing 10. Plugged in.

  Specifically, from the state of FIG. 8A, the distance between the tips of the first contact portion 54 a and the second contact portion 54 b of the coupling member 50 is increased so that the recesses 12 of the housing 10 are formed. It is inserted into the coupling member 50. Thereby, as shown in FIG. 8B, the coupling member 50 is in a state in which the end portions of the housing 10 and the support base 40 are sandwiched.

  Further, as shown in FIG. 8B, the convex portion 56a of the first contact portion 54a is engaged with the engagement portion 16a provided in the housing 10 in a concave shape, and the second contact portion 54b. The convex portion 56 b engages with an engaging portion 16 b provided in a concave shape on the support base 40. In the present embodiment, the engaging portion 16 a is realized by a hole provided in the housing 10, and the engaging portion 16 b is realized by a hole provided in the support base 40.

  Thus, the convex part 56a (56b) of the coupling member 50 engages with the engaging part 16a (16b) of the main body part 5. As a result, the coupling member 50 attached to the main body part 5 is detached from the main body part 5 unless an external force is applied to increase the distance between the tips of the first contact part 54a and the second contact part 54b. There is nothing. That is, the coupling member 50 is prevented from falling off (dropping out) from the main body 5.

  Therefore, when three mounting members 50 are attached so that the mounting substrate 20 is sandwiched between the housing 10 and the support base 40, the product obtained up to this step is immediately converted into a downstream process (something It can be transported to a place where processing or shipping operations are performed.

  Moreover, there is no restriction | limiting in the attitude | position of the produced product in the case of this conveyance. That is, it is also possible to transport the manufactured product in a state in which the product is vertically oriented (a direction in which the front and rear direction of the LED unit 1 is parallel to the horizontal direction), for example.

  Furthermore, since the coupling member 50 is not displaced in the main body part 5 due to vibrations and impacts that can normally occur during the conveyance of the manufactured product, the conveyance speed can be made relatively fast.

  In addition, if the connection member 50 is provided with at least one of the convex part 56a and the convex part 56b, the drop-off (drop-off) prevention effect of the connection member 50 can be acquired. Moreover, the shape and arrangement position of the convex part 56a and the convex part 56b which are shown to FIG. 4A are an example, and the convex part 56a or the convex part 56b is the aspect which engages with the housing | casing 10 or the support stand 40, and the coupling member 50 It only has to be arranged.

  The LED unit 1 to which the coupling member 50 is attached in this manner is attached to the luminaire by the screw 250 penetrating the main body 5 and the coupling member 50.

  FIG. 9 is a partial cross-sectional view of the LED unit 1 fixed to the lighting fixture 110 with screws 250.

  Specifically, FIG. 9 shows a cross-sectional view of the periphery of the penetration portion of the screw 250 in the main body 5.

  As shown in FIG. 9, when the LED unit 1 is attached to the lighting fixture by the screw 250, the elastic portion 51 applies a biasing force to the head 251 by coming into contact with the head 251 of the screw 250 from the rear.

  That is, the force in the direction opposite to the insertion direction (Z-axis negative direction in FIG. 9) (Z-axis positive direction in FIG. 9) is applied to the head 251 of the screw 250 from the coupling member 50 having the elastic portion 51. Given.

  Thereby, the head 251 of the screw 250 acts to push the main body 5 toward the lighting fixture 110.

  As a result, the fixing force of the LED unit 1 to the lighting fixture 110 is improved, and the adhesion of the back surface of the LED unit 1, that is, the back surface 40a of the support base 40, to the lighting fixture 110 is also improved.

  That is, the coupling member 50 having the elastic portion 51 can increase the contact area between the LED unit 1 and the lighting fixture 110, thereby efficiently releasing the heat generated in the LED unit 1 to the lighting fixture 110. Can do.

  The reaction force of the urging force applied from the coupling member 50 to the head 251 of the screw 250 acts as a force that narrows the coupling member 50 in the front-rear direction. Therefore, the urging force acts as a force that the casing 10 presses the mounting board 20 against the support base 40 via the elastic annular member 18.

  That is, the coupling member 50 having the elastic portion 51 can improve the adhesion between the mounting board 20 which is a main heat source in the LED unit 1 and the support base 40, and this also allows the LED unit 1 to Heat dissipation is improved.

  As described above, the LED unit 1 according to the present embodiment includes the coupling member 50. In addition to the function of stably coupling the housing 10 and the support base 40, the coupling member 50 also has a function of improving heat dissipation, such as improving the adhesion between the main body 5 and the lighting fixture 110 by the elastic part 51. Have.

  In other words, without using a separate component for pressing the LED unit 1 against the lighting fixture 110, heat conduction from the LED unit 1 to the lighting fixture 110 can be achieved by the component for assembling the main body 5 (the coupling member 50). Efficiency can be improved.

  That is, the LED unit 1 of the present embodiment is an illumination light source that can be efficiently produced and has improved heat dissipation.

  Specifically, in the present embodiment, the main body 5 of the LED unit 1 has a mounting hole 12a through which the screw 250 passes, and the coupling member 50 is disposed in the vicinity of the mounting hole 12a.

  The coupling member 50 has a through hole 53 through which a screw 250 passes, formed in a first abutting portion 54a that abuts the outer surface of the housing 10 parallel to the direction intersecting the front-rear direction, and an elastic portion. 51 is formed in the 1st contact part 54a.

  Since the LED unit 1 has such a configuration, for example, the urging force by the elastic portion 51 can be efficiently applied to the head 251 of the screw 250.

  The elastic portion 51 is provided integrally with the coupling member 50. That is, it can be easily manufactured by processing a sheet metal or the like as described above. For example, the number of parts required for the assembly of the LED unit 1 is not increased unnecessarily.

  The coupling member 50 further includes a convex portion 56a (56b) that protrudes in the front-rear direction and engages with the engaging portion 16a (16b) of the main body portion 5. In the present embodiment, the convex portion 56 a is engaged with the engaging portion 16 a of the housing 10, and the convex portion 56 b is engaged with the engaging portion 16 b of the support base 40.

  Thereby, the coupling member 50 is prevented from falling off (dropping out) from the main body portion 5, and the main body portion 5 with the coupling member 50 attached thereto is easily handled.

  In addition, the structure of the LED unit 1 which concerns on Embodiment 1 may be other than the structure shown by FIGS. Therefore, various modified examples of the configuration of the LED unit 1 will be described with reference to FIGS. 11 and 12, focusing on differences from the LED unit 1 according to Embodiment 1. FIG.

(Modification 1)
FIG. 10 is an external perspective view of a coupling member 50a according to the first modification of the first embodiment.

  A coupling member 50a illustrated in FIG. 10 is a member that can be employed instead of the coupling member 50 in, for example, the LED unit 1 according to Embodiment 1 illustrated in FIG.

  The coupling member 50a is formed of a material having predetermined rigidity and elasticity, such as metal or resin, like the coupling member 50 according to the first embodiment.

  The coupling member 50a according to Modification 1 has only one elastic portion 51 and does not have a hole through which the screw 250 passes.

  Even in such a configuration, the coupling member 50a is disposed in the vicinity of the mounting hole 12a (for example, see FIG. 6) of the main body portion 5, and thus, as described above, the head portion of the screw 250 by the elastic portion 51. A biasing force to 251 is given. That is, the coupling member 50a can improve the heat dissipation in the LED unit 1 while coupling the housing 10 and the support base 40, similarly to the coupling member 50 in the first embodiment.

(Modification 2)
FIG. 11 is a cross-sectional view showing the configuration of the coupling member 150 according to the second modification of the first embodiment.

  Specifically, FIG. 11A is a diagram illustrating a partial cross section around the coupling member 150 in a state where the coupling member 150 is attached to the main body 5. FIG. 11B is a diagram showing a partial cross section around the coupling member 150 in a state of being fixed to the luminaire 110 with the screw 250.

  The coupling member 150 is formed of a material having a predetermined rigidity and elasticity such as metal or resin, like the coupling member 50 according to the first embodiment.

  As shown in FIG. 11A, the coupling member 150 includes a flat surface portion 154 a provided on the housing 10 side and an abutting portion 154 b that abuts on the support base 40. Further, the flat portion 154a is provided with a protrusion 155, and the flat portion 154a and the protrusion 155 constitute an elastic portion 151.

  In other words, the elastic portion 151 in the present modified example protrudes in the direction of the outer surface of the housing 10 from the flat surface portion 154a extending in a direction intersecting the front-rear direction in front of the outer surface of the housing 10. And a protrusion 155.

  In the present modification, the protrusion 155 is provided with a stepped portion, and the convex portion 156a behind the stepped portion (downward in FIG. 11) is engaged with the engaging portion 16a of the housing 10. Further, the step portion of the protrusion 155 is in contact with the outer surface of the housing 10.

  The contact portion 154b is provided with a convex portion 156b that engages with the engagement portion 16b of the support base 40.

  In the coupling member 150 having such a configuration, as shown in FIG. 11A, a clearance having a distance d in the front-rear direction (vertical direction in FIG. 11) is provided between the flat portion 154 a and the outer surface of the housing 10. Exists.

  Therefore, when the LED unit 1 to which the coupling member 150 is attached is fixed to the lighting fixture 110 with the screw 255, the flat surface portion 154a is pressed by the head 256 of the screw 255 as shown in FIG. As a result, the screw 255 is deformed into a convex shape in the insertion direction.

  As a result, a restoring force is generated in the elastic flat portion 154a, and the restoring force is applied from the flat portion 154a to the head 256 of the screw 255 as an urging force against the head 256 of the screw 255.

  The screw 255 is an example of an attachment member, and the head 256 is an example of a protruding portion.

  Thus, unlike the coupling member 50 in the first embodiment, the coupling member 150 according to the present modified example is similar to the elastic portion 51 from a portion (a flat portion 154a in the coupling member 150) that extends laterally. It does not have a forward protruding part.

  However, the presence of a clearance between the flat surface portion 154a and the outer surface of the housing 10 causes the flat surface portion 154a to deform as a whole when pressed by the head 256 of the screw 255. Thereby, the plane part 154a exhibits the same function as, for example, a leaf spring, and a force in the direction opposite to the insertion direction of the screw 255 is applied to the head 256 of the screw 255 from the plane part 154a.

  That is, the head portion 256 of the screw 255 acts to push the main body portion 5 toward the lighting fixture 110.

  As a result, the fixing force of the LED unit 1 to the lighting fixture 110 is improved, and the adhesion of the back surface of the LED unit 1, that is, the back surface 40a of the support base 40, to the lighting fixture 110 is also improved.

  That is, the coupling member 150 in the present modification can combine the housing 10 and the support base 40 and improve the heat dissipation in the LED unit 1 as in the coupling member 50 in the first embodiment.

  As described above, the LED unit 1 according to the first embodiment and the modifications 1 and 2 has been described. However, the configuration of the LED unit 1 is not limited to the above description.

  For example, the housing 10 may not have an opening in front of the mounting substrate 20. For example, when the housing 10 is formed of a light-transmitting material that transmits light from the light emitting unit 21, the front of the light emitting unit 21 may be covered with a part of the housing 10.

  Moreover, the main-body part 5 does not need to be provided with the hole which attachment members (for example, screw 250) penetrate, such as attachment holes 12a and 13a. In this case, for example, the through hole 53 may not be formed in the coupling member 50.

  For example, a case is assumed where a Z-shaped bracket that is screwed to the lighting fixture 110 is employed as an attachment member. In this case, the metal fitting is arranged so that a piece of the metal fitting on the front surface 10 a side of the housing 10 is positioned in front of the elastic portion 51 of the coupling member 50. Thereby, it is possible to give the urging | biasing force by the elastic part 51 with respect to the said metal fitting.

  Moreover, the number of the elastic parts 51 with which the coupling member 50 is provided does not need to be four, and may be one similarly to the coupling member 50a in the modification 1, or five or more.

  Further, a portion where a plurality of elements that apply a biasing force to the head 251 by being pressed by, for example, the head 251 of the screw 250, such as the elastic portion 51, may be referred to as an “elastic portion”.

  Further, for example, the coupling member 150 according to the second modification may further include the elastic portion 51 according to the first embodiment. That is, you may provide the elastic part 51 of the shape which protruded diagonally ahead in the plane part 154a. In other words, the elastic part 151 may include the elastic part 51.

  Thereby, for example, the biasing force that the elastic portion 151 applies to the head 256 of the screw 255 can be increased.

  Moreover, although the LED unit 1 is circular and flat shape as a whole, these shapes are not particularly limited. For example, the LED unit 1 may have a polygonal shape in a plan view, or may have a shape formed by a combination of a curved line and a straight line.

  Further, the LED unit 1 may include, for example, a power supply circuit that receives AC power and converts it into DC power inside the housing 10. In this case, the power supply circuit connected to the holding unit 30 may receive AC power supplied from, for example, the lighting fixture 110 via the lead wires 122a and 122b.

(Embodiment 2)
Next, the illuminating device 100 which concerns on Embodiment 2 of this invention is demonstrated.

  FIG. 12 is a cross-sectional view showing a schematic configuration of illumination apparatus 100 according to Embodiment 2. In FIG.

  As shown in FIG. 12, the lighting device 100 is a downlight attached to the ceiling board 200, for example. The lighting device 100 includes the lighting fixture 110 and the LED unit 1 having the coupling member 50 according to the first embodiment.

  The lighting device 100 includes the LED unit 1 having the coupling member 50a according to the first modification, or the LED unit 1 having the coupling member 150 according to the second modification, instead of the LED unit 1. May be.

  The lighting fixture 110 is a fixture for supplying power to the LED unit 1 attached to the lighting fixture 110. The lighting fixture 110 includes a fixture main body 110 a provided so as to cover the LED unit 1, and a power supply circuit 220 that supplies power to the LED unit 1.

  The instrument main body 110a has a heat radiation part 110b and a reflection part 110c, and the power supply circuit 220 has lead wires 220a and 220b.

  The heat radiating part 110 b radiates heat transmitted from the LED unit 1. The heat dissipating part 110b accommodates the power supply circuit 220 therein, and the LED unit 1 is fixed to the front part (the lower part in FIG. 12).

  For example, the LED unit 1 is fixed to the lower surface portion of the heat radiating portion 110b by screws 250 that pass through the mounting holes 12a disposed in the three concave portions 12 of the LED unit 1.

  Here, the shape of the heat radiating portion 110b is not particularly limited as long as it is a shape suitable for heat radiation. For example, a shape in which fins are radially formed on the outer periphery is conceivable. Moreover, it is preferable to comprise the thermal radiation part 110b with a material with high heat conductivity, such as aluminum.

  The reflection part 110c has a substantially cup shape in which a circular opening is formed in the front part (lower part), and is configured to surround the side of the LED unit 1. Specifically, the reflecting portion 110c is a cylindrical portion formed so that the inner diameter gradually increases downward from the periphery of the lower surface portion of the heat radiating portion 110b.

  That is, the reflection part 110c has an opening on the light irradiation side, and is formed so as to reflect the light from the LED unit 1. For example, the reflecting portion 110c is formed of a white synthetic resin having an insulating property.

  In addition, in order to improve a reflectance, you may coat a reflective film on the inner surface of the reflection part 110c. Moreover, the reflection part 110c is not limited to the thing made from a synthetic resin, You may be implement | achieved by the metal reflection plates formed by pressing a metal plate.

  The power supply circuit 220 is a member for supplying DC power to the LED unit 1. That is, in the power supply circuit 220, circuit elements (electronic components) for converting AC power to DC power are arranged.

  The power supply circuit 220 receives AC power, converts it into DC power, and supplies the DC power to the LED unit 1 via the lead wires 220a and 220b.

  Specifically, the lead wires 220a and 220b are connected to the lead wires 122a and 122b via the connectors 221 and 222, respectively. Thereby, the LED unit 1 can receive DC power supplied from the power supply circuit 220 via the lead wires 122a and 122b.

  In addition, the lighting fixture 110 may be implement | achieved as an instrument which can light-control the LED unit 1 by arrange | positioning the electronic component etc. for performing the light control of the LED unit 1 in the power supply circuit 220. FIG.

  Further, when the LED unit 1 attached to the lighting fixture 110 includes a power supply circuit that performs conversion from alternating current to direct current, the lighting device 100 may not include the power supply circuit 220.

  As described above, according to the illumination device 100 according to the second embodiment of the present invention, the LED unit 1 according to the first embodiment is provided, and therefore, the same effects as those in the first embodiment can be obtained.

  That is, in the illuminating device 100, since the discharge | release (heat dissipation) of the heat | fever which generate | occur | produces in the LED unit 1 is performed efficiently, the fall of the luminous efficiency of 1 or more LED which the LED unit 1 has can be suppressed. This effect is similarly exhibited even when the lighting device 100 is subjected to various modifications described in the first embodiment and the first and second modifications.

(Other)
As mentioned above, although the LED unit and the illuminating device which concern on this invention were demonstrated based on Embodiment 1, its modification 1 and 2, and Embodiment 2, this invention is based on these embodiment and modification. It is not limited.

  For example, in the first embodiment, the light emitting unit 21 has a COB (Chip On Board) type configuration in which one or more LED chips 21a are directly mounted on the mounting substrate 20. However, the present invention is not limited to this.

  For example, a package-type LED element in which an LED chip is mounted in a resin-molded cavity and a phosphor-containing resin is sealed in the cavity may be employed as the light-emitting element included in the light-emitting unit 21. That is, as the light emitting unit 21, a surface mount type (SMD) light emitting unit configured by mounting one or more LED elements on a substrate may be employed.

  Moreover, in said Embodiment 1, although the light emission part 21 was comprised so that white light might be emitted by blue LED and yellow fluorescent substance, it is not restricted to this. For example, a phosphor-containing resin containing a red phosphor and a green phosphor may be used and combined with a blue LED to emit white light.

  The light emitting unit 21 may use an LED that emits a color other than blue. For example, when an ultraviolet light emitting LED chip is used as the LED, a combination of phosphor particles that emit light in three primary colors (red, green, and blue) can be used as the phosphor particles. Furthermore, a wavelength conversion material other than the phosphor particles may be used. For example, the wavelength conversion material absorbs light of a certain wavelength such as a semiconductor, a metal complex, an organic dye, or a pigment, and has a wavelength different from the absorbed light. A material containing a substance that emits light may be used.

  In the first embodiment, the LED is exemplified as the light emitting element. However, a semiconductor light emitting element such as a semiconductor laser, or a light emitting element such as an organic EL (Electro Luminescence) or inorganic EL may be used.

  In addition, the form obtained by making various modifications conceived by those skilled in the art with respect to each embodiment and modification, or the components and functions in each embodiment and modification are optional without departing from the gist of the present invention. Embodiments realized by combining these are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 LED unit 5 Main body part 10 Case 10a Front surface 12, 13 Concave part 12a, 13a Attachment hole 15 Release hole 16a, 16b Engagement part 18 Annular member 20 Mounting board 21 Light emission part 22 Lead wire attachment part 22a, 22b Insertion hole 30 Holding Part 40 support 40a back 50, 50a, 150 coupling member 51, 151 elastic part 53 through hole 54a first contact part 54b second contact part 56a, 56b, 156a, 156b convex part 100 lighting device 110 lighting tool 110a tool Main body 110b Heat radiation part 110c Reflection part 122a, 122b, 220a, 220b Lead wire 154a Plane part 154b Abutting part 155 Protrusion 200 Ceiling plate 220 Power supply circuit 221, 222 Connector 250, 255 Screw 251, 256 Head 252 Shaft

Claims (7)

A light source for illumination that is attached to a lighting fixture using an attachment member,
A substrate provided with a light emitting element that emits light forward;
A support base disposed behind the substrate, and a main body having a housing disposed so as to sandwich the substrate in the front-rear direction with the support base;
A coupling member that overlaps and couples the support base and the casing in the front-rear direction;
When the light source for illumination is attached to the lighting fixture, the coupling member abuts a protrusion protruding in a direction intersecting the front-rear direction of the attachment member from the rear, thereby applying a biasing force to the protrusion. A light source for illumination having an elastic portion to give. The main body has a mounting hole through which the mounting member passes,
The illumination light source according to claim 1, wherein the coupling member is disposed in the vicinity of the attachment hole. The coupling member has a through-hole formed in a contact portion that is a portion that contacts an outer surface parallel to a direction intersecting the front-rear direction of the housing, and through which the attachment member passes.
The illumination light source according to claim 2, wherein the elastic portion is formed in the contact portion. The illumination light source according to claim 1, wherein the elastic portion is provided integrally with the coupling member. The elastic portion includes a flat portion extending in a direction intersecting the front-rear direction in front of the outer surface of the housing, and a protrusion protruding from the flat portion toward the outer surface of the housing. Item 5. The light source for illumination according to any one of Items 1 to 4. The illumination light source according to any one of claims 1 to 5, wherein the coupling member has a convex portion that protrudes in the front-rear direction and engages with an engagement portion that is provided in a concave shape in the main body portion. The illumination light source according to any one of claims 1 to 6,
A lighting device comprising: a lighting fixture to which the lighting light source is attached and for supplying power to the lighting light source.

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