JP4671064B2 - lighting equipment - Google Patents

Description

   The present invention relates to a lighting apparatus using a light emitting diode or the like as a light source.

  In recent years, lighting fixtures using light emitting diodes as light sources have been developed.

  In this type of lighting fixture using a light emitting diode as a light source, the light is controlled by a lens in order to efficiently emit light from the light emitting diode (for example, see Patent Document 1).

Further, since the light output of the light emitting diode decreases as the temperature rises, heat generated from the light emitting diode is radiated to the outside (for example, see Patent Documents 1 and 2).
JP 2004-179048 A JP 2006-313718 A

  Since the lighting fixture shown in Patent Document 1 performs optical control with a lens, a holder as a separate part for mechanically holding the lens is required. In particular, in order to exhibit optical performance as designed. Therefore, it is necessary to accurately perform optical positioning, and a more complicated and expensive holder mechanism is required.

  Further, in order to dissipate heat generated from the light emitting diodes, the reflector is made of aluminum having excellent heat dissipation, and a plurality of heat dissipating fins are integrally formed on the back surface to provide a function as a heat sink.

  However, in recent years, light-emitting diodes have become increasingly brighter and more powerful, and the amount of heat generated has been increasing. Therefore, this type of heat sink has a short heat dissipation area, and the size of the heatsink fins and the reflector itself It is necessary to increase the plate thickness, size, etc., and this becomes a factor in increasing the size of the instrument.

  Patent Document 2 discloses a light bulb type lamp in which a light source substrate on which a light emitting diode is mounted is mounted on an outer member made of aluminum and heat is radiated to the outside.

  However, as a mounting method, the screw is fixed by screwing the screw from the light source board to the light source mounting portion of the outer member. For this reason, the screw head is exposed on the surface side of the device, and there is a problem that the merchantability is impaired.

  When the cover member of the lamp is made of an opaque member such as milky white, the screw head cannot be seen, but a transparent cover member, a so-called globeless lamp having no cover member, and Patent Document 1 In a downlight or the like that requires interior characteristics as shown in Fig. 1, the fact that screws for component mounting are visible is a problem that cannot be overlooked from the standpoint of merchantability.

  For this reason, in this type of lighting fixture that uses light emitting diodes or the like as a light source, a lighting fixture that exhibits optical performance as designed with a simple configuration, further improves heat dissipation performance, and does not impair commerciality. How to achieve this is an important issue.

  The present invention is intended to provide a lighting fixture that exhibits optical performance and improves heat dissipation performance without sacrificing merchantability.

The invention of the lighting device according to claim 1 includes: a fixture main body including a light source arrangement portion having thermal conductivity; a substrate on which a light source is arranged; and the substrate is arranged between the light source arrangement portion, A reflector for controlling the light of the light source; tightening from the light source arrangement part side , pulling the reflector to the instrument body, pressing the substrate toward the instrument body by the reflector, and transferring heat generated from the light source to the instrument body And a fixing means for fixing the first and second fixing means.

  In the present invention, the instrument body may be made of aluminum (Al), copper (Cu), iron (Fe), etc. having good thermal conductivity, or may be made of a synthetic resin such as a high thermal conductive resin. All materials for dissipating heat from the light source are acceptable.

The fixture body may constitute a downlight-type lighting fixture such as a round shape or a square shape.

  The light source is a small light source, and may be a semiconductor light emitting element such as a light emitting diode or a semiconductor laser, an incandescent light bulb such as a small light bulb or a halogen light bulb, or the like. Particularly in the case of a semiconductor light emitting element, a heat dissipation effect is obtained, which is preferable.

  The reflector is preferably made of a white synthetic resin having light resistance and electrical insulation, such as PBT (polybutylene terephthalate), but may be made of a metal such as aluminum or stainless steel.

  The reflector may be controlled only by the reflector, or may be controlled by further adding a separate light control member such as a lens body.

  As the fixing means, all fixing means capable of bringing the substrate into close contact with the instrument body while drawing the reflector, such as screw screws, tapping screws, screws such as bolts and nuts, and rivets are allowed.

According to a second aspect of the present invention, there is provided a lighting fixture comprising: a fixture main body including a light source arrangement portion having heat conductivity; a substrate on which a light emitting diode is arranged; and the substrate disposed between the light source arrangement portion. A reflector for controlling the light of the light emitting diode; the reflector is tightened from the light source arrangement side , the reflector is drawn to the instrument body, the substrate is pressed against the instrument body by the reflector, and the heat generated from the light source is generated And a screw that is fixed so as to be transmitted.

  According to a third aspect of the present invention, in the lighting apparatus according to the first or second aspect, the reflector has a mortar-shaped through hole, and the end surface of the through hole is a substrate when the substrate is pressed toward the apparatus main body. It is characterized by abutting on.

  The means for causing the substantially central part and the peripheral part to be in contact with the substrate is, for example, a stepped part or a concave part other than the substantially central part and the peripheral part. You may make it make the effect | action for preventing the meat | shrink close which tends to occur.

  By doing so, the distortion of the reflector can be suppressed in the molding, and even if the reflector is tightened, the shape of the reflector is not deformed, and predetermined optical characteristics can be satisfied. .

  According to a fourth aspect of the present invention, in the lighting fixture according to any one of the first to third aspects, the reflector is provided with a stopper for restricting rotation.

  According to a fifth aspect of the present invention, in the lighting fixture according to any one of the first to fourth aspects, the fixture body includes a translucent cover member and a support made of a spring material for installation on the installation surface. It is characterized by being arranged.

  The translucent cover member may be composed of transparent or milky white translucent acrylic resin or polycarbonate, or may be colored, or may be composed of tempered glass having translucency, not limited to synthetic resin. May be.

  The translucent cover member may be provided, for example, on a decorative frame in the downlight.

  According to a sixth aspect of the present invention, in the lighting fixture according to any one of the first to fifth aspects, the reflector has a recess that forms a gap into which the substrate is fitted when the reflector is disposed opposite the substrate. A lighting fixture according to any one of claims 1 to 5, wherein:

According to the first aspect of the present invention, the reflector that controls the light of the light source can exhibit optical performance, and the substrate is disposed between the light source disposition part and the reflector, and the light source disposition part Fixing means while improving the heat radiation performance by fixing means to transmit the heat generated from the light source to the instrument body by tightening from the side and pulling the reflector to the instrument body and pressing the substrate to the instrument body side by the reflector However, it is possible to provide a lighting fixture that does not impair the merchantability.

  According to the second aspect of the present invention, since the light source of the light source unit is composed of a light emitting diode, it is possible to provide a lighting fixture that can reduce the size of the fixture body.

  According to the invention of claim 3, it is possible to prevent the shrinkage that is likely to occur during resin molding by forming the reflector into a stepped portion or a recessed portion except for the substantially central portion and the peripheral portion. It is possible to satisfy the predetermined optical performance by preventing the deformation.

  According to the fourth aspect of the present invention, the reflector is provided with the stopper for restricting the rotation, so that the optical positioning of the light source and the reflector can be performed easily and reliably.

  According to the invention of claim 5, since the support member made of the light-transmitting cover member and the spring material for installation on the installation surface is disposed, the optical performance is exhibited and the heat dissipation performance is improved. Further, it is possible to provide a lighting apparatus that does not impair the merchantability.

  According to the sixth aspect of the present invention, it is possible to provide a lighting apparatus that can improve the heat dissipation performance and that the fixing means cannot be visually recognized from the appearance, and that does not impair the merchantability.

  Hereinafter, embodiments of the lighting apparatus according to the present invention will be described.

  The lighting fixture of the present embodiment uses a plurality of light emitting diodes with high luminance and high output, and is configured as a downlight type lighting fixture for general houses, for example.

  Reference numeral 1 denotes a lighting fixture, which includes a fixture body 10, a substrate 30 on which the light source 20 is disposed, a reflector 40 that reflects and controls light from the light source, and a fixing means 50 that closely attaches the substrate to the fixture body.

  The light source is composed of a light emitting diode 20 (hereinafter referred to as “LED”), and the LEDs are provided with four LEDs of the same color, in the present embodiment, high-brightness and high-power white LEDs. That is, it is composed of the same kind of performance that mainly emits light in the direction of the optical axis of the LED.

  The substrate 30 is made of a disc-shaped wiring substrate having a diameter of about 60 mm, and the four LEDs 20 are arranged on the substrate at equal intervals in a concentric manner.

  As shown in FIG. 2 and FIG. 8A, the substrate 30 is formed of a heat-resistant and electrically insulating printed wiring board, and a circuit for mounting and wiring the LEDs 20 on the front surface side (lower surface side in FIG. 2). A pattern 30a is formed, a heat diffusion layer 30b made of a metal foil such as copper is formed on the back surface side (upper surface side in FIG. 2), and an insertion hole 30c for attachment is formed in a substantially central portion.

  The reflector 40 is made of a white synthetic resin having light resistance and electrical insulation, for example, PBT (polybutylene terephthalate), and is formed in a disk shape having a diameter slightly larger than the diameter of the substrate 30.

  As shown in FIGS. 2, 7, and 8 (b), on the surface side (lower surface side in FIG. 2) of the reflector 40, a step 40 a is formed on the outer periphery thereof, and the rotation expands to the surface side. Four mortar-shaped through-holes 40c having a parabolic reflecting surface 40b are integrally formed.

  On the back surface side (upper surface side in FIG. 2), a recess 40d for forming a gap having a thickness with which the substrate 30 is fitted is formed.

  The four mortar-shaped through holes 40c are formed at positions facing the four LEDs 20 respectively.

  Aluminum is vapor-deposited on the surface side of the reflector 40 and the reflecting surface 40b having the shape of a rotating paraboloid to form a mirror surface layer 40e. In addition, as shown in FIG.8 (b), aluminum is not vapor-deposited on the step part 40a.

  This ensures an electrical insulation distance between the power supply unit and the aluminum instrument body 10 that is a non-chargeable metal part that may be grounded with the power supply.

  The rear surface side of the reflector 40 has a substantially central portion, a peripheral edge portion, and an end surface of the mortar-shaped through hole 40c as contact portions 40f, 40f, and 40f with respect to the surface side of the substrate 30, respectively. The portion is formed as a recess 40g, 40g, etc. so as to prevent shrinkage during resin molding. (Fig. 7 (b))

  In addition, an attachment screw hole (female screw portion) 40 h corresponding to the insertion hole 30 c of the substrate 30 is formed in a substantially central portion.

  On the outer peripheral surface of the reflector 40, a pair of notch portions 40i serving as stoppers for restricting the rotation of the reflector are formed opposite to each other in the radial direction. (Fig. 6)

  The substrate 30 and the reflector 40 are disposed so that each LED 20 mounted on the substrate is opposed to the contact portion 40f of the through hole 40c of the reflector, and the substrate is fitted into the concave portion 40d of the reflector. The light source unit A having a disk shape and having a substantially circular light emitting surface in plan view is configured.

  Next, reference numeral 10 denotes an instrument body, which is made of aluminum with good thermal conductivity that forms a cylindrical body with open ends for accommodating a power source section 60 described later in the light source section A and inside.

  The instrument main body 10 is made of aluminum die-casting, and is configured as a cylindrical case member having a substantially circular cross section having openings 10a and 10b at both ends, and is located on the opening 10a side of one end portion inside the cylindrical body. A partition plate 10c serving as a light source arrangement portion for arranging the light source portion is integrally formed, and a storage portion S1 for storing the light source portion A is formed between the opening 10a and the partition plate 10c.

In the substantially central portion of the partition plate 10c, a corresponding mounting insertion hole 10d is formed so as to penetrate through the insertion holes 30c and the screw holes 40h of the substrate 30 and the reflector 40, respectively.

(Fig. 8 (a))

  The insertion hole 10d is formed with a countersink so that the head of the screw 50 is accommodated. By this counter boring, the electrical insulation distance between the metal screw head and the wiring board 60b of the power supply unit 60 described later is increased.

  Further, the opening 10b on the other end side is closed with an end plate 10e configured separately. The end plate serves as a mounting portion for disposing a power terminal block 70, which will be described later. The end plate is made of aluminum die cast like the instrument body, and is configured as a circular lid having a dish shape. And is fixed by using two screws 51, 51 from the side surfaces facing in the radial direction.

Thereby, the space part 10f for accommodating the power supply part 60 is formed between the partition plate 10c and the end plate 10e.

In the figure, 10g is a pair of protrusions integrally formed in the radial direction on the inner peripheral surface of the opening 10a at one end, and is a stopper that engages with the notch 40i of the reflector 40 to restrict the rotation of the reflector. It becomes. (Fig. 6)

  Reference numeral 10h denotes a support step portion for supporting the wiring board 60a of the power supply portion 60 that is integrally formed facing the space portion 10f side of the partition plate 10c.

Furthermore, the instrument body 10 integrally extends the opening 10b on the other end side in the direction of the axis 0-0 of the cylindrical body to form a side wall 10i, and a concave portion 10j is formed by the side wall and the upper surface of the end plate 10e. The instrument body increases the heat radiation area by extending the side wall 10i.

The recess 10j is a recess for housing the power supply terminal block 70 and supporting the power supply terminal block while protecting the power supply terminal block from external force. The side walls 10i forming the recesses are opposed to openings 10k, 10k communicating with the outside. A pair is provided.

  The power supply unit 60 includes a wiring board 60b on which a power supply circuit 60a for lighting each LED 20 is mounted. The power supply circuit absorbs surges at input terminals 60c and 60c connected to a commercial power supply as shown in FIG. A full-wave rectifier 60e formed of a diode bridge is connected in parallel through a varistor 60d for use. 60f is a current fuse, and 60g and 60g are output terminals.

  The wiring board 60b of the power supply unit 60 is formed of a disc-shaped printed wiring board, and a circuit pattern constituting the power supply circuit 60a is formed on the surface side (upper surface side in FIG. 2), and electrical components are mounted.

  Among the electric components of the power supply circuit, the varistor 60d is arranged on the back surface side (the lower surface side in FIG. 2) of the wiring board 60b, and the other electric components are arranged on the front surface side.

  The power supply terminal block 70 is a terminal block for supplying commercial power to the power supply unit 60. The power supply terminal block 70 serves as a power cable terminal on both sides of a box 70a made of a flame-retardant and electrically insulating synthetic resin. It has an insertion port 70b, an insertion port 70c serving as a terminal portion for a feed cable, and an insertion port 70d serving as a terminal portion for an in-appliance lead wire. A release button 70e for causing the

  The height h1 of the side wall 10i of the recess 10j formed in the instrument body 10 described above is slightly larger than the height h2 of the release button 70e when the power terminal block 70 is supported in the recess, and is about 2.5 mm in this embodiment. Form to be higher. (Fig. 5)

  Reference numeral 80 denotes a decorative frame provided in the opening 10a at one end of the instrument main body 10, which is formed of a synthetic resin having a ring shape and a substantially L-shaped cross section. 10a is fitted into the outer surface and fixed with rivets or the like.

  Further, a cover member 81 made of a transparent acrylic resin is fitted and fixed to the inner surface of the ring of the decorative frame 80.

  Reference numeral 90 denotes a support, which is composed of two substantially L-shaped leaf springs formed by pressing a stainless steel plate material. The L-shaped vertical portion is positioned on the outer surface of the instrument body 10 so as to face the radial direction. And fixed with screws 53, 53.

  The support 90 made of the leaf spring is inserted into the installation hole Y of the installation surface X such as the ceiling together with the instrument body 10 while being bent inward, and after insertion, the support 90 is restored to its original state by its own elasticity. It returns and press-contacts with the inner surface of the installation hole Y, and the instrument main body 10 is fixed to the ceiling X by the press-contact force. In the case of removal, the reverse operation is performed.

  Next, a configuration in which the light source unit A, the power supply unit 60, and the power supply terminal block 70 are incorporated in the instrument main body 10 configured as described above will be described.

First, the light source unit A is incorporated. That is, each LED 20 mounted on the front surface side of the substrate 30 is inserted into the storage portion S1 with the light source emission side facing the reflector 40 and the back surface facing the partition plate 10c of the instrument body, A board | substrate is arrange | positioned so that it may be inserted | pinched between the partition plate 10c and the reflector 40 of an instrument main body.

  At this time, the notch 40i on the outer peripheral surface of the reflector 40 is inserted into the protrusion 10g of the instrument body and engaged with each other.

  As a result, the reflector is positioned and the rotation of the reflector is controlled at the same time, and the optical positioning of each LED 20 and the reflector 40 is automatically completed.

  Further, the screw 50, which is a fixing member of the present invention, is inserted into the insertion hole 10d of the partition plate 10c and the insertion hole 30c of the substrate 40 formed in the substantially central portion, and further screwed into the screw hole 40h of the reflection plate and tightened. . (Fig. 8 (a))

  When the screw 50 is screwed in, the reflector 40 is drawn toward the partition plate side of the instrument main body 10, and the substrate 30 is pressed and adhered to the partition plate side by the reflector.

  Thereby, the light source part A is accommodated and supported in the accommodating part S1 formed in the one end part side of the instrument main body 10 in the state which completed optical positioning.

  At this time, since the reflector 40 is tightened substantially at the center, the tightening force is evenly applied to the reflecting plate and is not distorted.

  Next, the wiring board 60b of the power supply unit 60 is inserted into the space 10f formed between the partition plate 10c and the end plate 10e, and the peripheral edge of the wiring board is brought into contact with the support step 10h with the screw 52. Fix it.

A cylindrical insulating sheet 55 shown in FIG. 7C is disposed on the inner peripheral surface of the space portion 10f of the instrument main body, and between the outer peripheral surface of the wiring board 60b and the inner peripheral surface of the instrument main body 10, That is, there is a risk that an insulating sheet is interposed on the outer periphery of the power supply unit 60 to electrically insulate between the circuit pattern formed on the surface side of the wiring board and the inner peripheral surface of the aluminum instrument body 10, that is, to ground the power supply. It is set as the structure which takes electrical insulation by interposing a predetermined distance and interposing an insulating material between the instrument main body which is a certain non-charging metal part.

The insulating sheet 55 is made of a flexible material having excellent electrical insulation properties and heat resistance, such as polycarbonate and PET (polyethylene terephthalate), and a convex portion 55a is integrally formed on the upper end surface of the cylinder. By engaging with the concave portion 101 formed on the side surface, positioning, rotation and upward displacement are prevented.

55b is a notch formed corresponding to the support step portion 10h of the instrument body 10, and when the insulating sheet 55 is inserted into the inner peripheral surface of the instrument body, the lower end surface of the sheet is inserted while being locked to the support step portion. To prevent it from becoming impossible.

As described above, when the wiring board 60b is fixed to the support step 10h, a space S2 having a predetermined size is formed between the wiring board 60b and the partition plate 10c by the support step, and the aluminum partition plate 10c and the wiring board 60b are formed. An electrical insulation distance between them is ensured.

  As described above, the output board 60g, 60g of the power supply circuit 60a and the input terminal of the LED 20 are separated from the wiring board 60b of the power supply unit 60 and the board 30 of the light source unit A housed in the instrument body 10 by the lead wire 56. It connects through the insertion hole 10m formed in this.

  Next, the power terminal block 70 is placed on the upper surface of the end plate 10e of the instrument body 10 and fixed with screws 54, and the end plate to which the power terminal block is fixed is connected to the opening 10b on the other end side of the instrument body. The terminal block is fitted so as to face outward, and is fixed by using two screws 51, 51 from the radially opposite side surfaces.

As a result, the release button 70e of the power terminal block 70 is disposed and supported in the recess 10j formed at the other end of the instrument body 10 in a state about 2.5 mm lower than the side wall 10i of the recess.

It should be noted that the openings 10k, 10k formed in the side wall 10i of the recess 10j are terminal portions on both sides of the power terminal block so as to guide the power cable or the like into each insertion port of the power terminal block 70. The entrances 70b and 70c and 70d are fixed so as to be opposed to the respective openings 10k and 10k.

  As described above, the power supply terminal block 70 disposed and supported in the recess 10j of the instrument body 10 and the wiring board 60b of the power supply unit 60 are connected to the insertion ports 70d and 70d of the power supply terminal block 70 by the instrument lead-in wire 57. Input terminals 60c and 60c of the power supply circuit 60a are connected through an insertion hole 10n formed in the end plate 10e. (Fig. 5)

  At this time, the in-instrument lead-in wire 57 is guided by the one opening 10k of the recess 10j, bent in a loop shape, and wired.

  The openings 10k, 10k formed in the side wall 10i of the recess 10j provide a guide for drawing the power cable a, the feed cable b, etc. into each insertion port of the power terminal block 70, as described above. The effect | action which distribute | circulates external air in 10j is also performed.

  As described above, the light source is composed of four LEDs 20, the light source part A that supports the LED 20 and the reflector 40 is formed at one end, the recess 10j is formed at the other end, and the power terminal block 70 is disposed inside. The lighting fixture 1 which accommodated the power supply part 60 and integrated the power supply part with the fixture main body 10 is comprised.

  As shown in FIG. 5, this lighting fixture is a small size that is driven by AC100V with a power consumption of 5 W, with a height dimension H of about 84 mm, a decorative frame diameter dimension D1 of about 88 mm, and an instrument body diameter dimension D2 of about 65 mm. Configured as a downlight.

  The lighting fixture 1 having the above-described configuration is used by connecting a single or a plurality of the lighting fixtures 1 to the ceiling X, which is an installation surface, using a feeding cable. For example, a construction procedure in the case of installing two units as ceiling lamps in a hallway in a general house will be described.

  First, as shown in FIG. 10, two circular installation holes Y are formed at predetermined positions on the ceiling X. Since the instrument body 10 is small, a small installation hole is sufficient, and the installation is easy.

  The diameter D3 of the installation hole Y is D3 = D1 <D2, and in the present embodiment, a circular through hole of about 75 mm is formed. Next, the power cable a previously connected and connected to the commercial power source is inserted into the power cable insertion ports 70b and 70b of the power terminal block 70 and connected.

  Similarly, the feeding cable b for the second device wired in advance is inserted into the insertion ports 70c and 70c for the feeding cable and connected.

  With the cables a and b connected, the support 90 made of a leaf spring of the instrument body 10 is bent inward by hand and inserted into the installation hole Y together with the instrument body, and the upper surface of the L-shaped ring of the decorative frame 80 is The position is determined by contacting the ceiling surface X.

  Release the support 90 after the position has been determined. As a result, the plate spring returns to its original state due to its own elasticity and is pressed against the inner surface of the installation hole Y, and the instrument main body 10 is fixed to the ceiling X by the pressing force. The cut end of the installation hole Y is beautifully covered with the decorative frame 80.

  At the same time, when the instrument main body 10 is viewed from the lower surface, the screw head of the screw 50 for attaching the light source unit A to the instrument main body cannot be visually recognized as in the prior art, and the surface of the reflector 40 and Since the reflecting surface 40c is formed in a mirror surface, it is installed in a more beautiful state in appearance, and the merchantability and interior properties are not impaired.

  Further, when the instrument body is inserted into the installation hole, for example, even if the upper surface of the instrument body 10 hits a beam protruding from the back of the ceiling, a heat insulating material, a duct for air conditioning or a cable, etc., the release button of the power terminal block 70 70e is supported about 2.5 mm lower than the side wall 10i of the recess, so that the recess side wall 10i serves as a stopper for these protrusions, and the release button is inadvertently pressed to disconnect the power cable or the like. There is nothing to do.

Next, the other end of the feeding cable b having one end connected to the first instrument body 10 is inserted and connected to the power cable insertion port of the second instrument body 10 ′.

  With the feeding cable b connected, it is inserted into the ceiling installation hole Y in the same manner as the first unit to complete the installation.

  When the two lighting fixtures 1, 1 ′ installed above are turned on, the light emitted from each LED 20 is reflected by the reflecting surface 40 c formed of the rotating paraboloid of the reflector 40 and formed on the mirror surface. Radiated downwards into the shape, providing the desired illumination along the length of the corridor.

  Further, the heat generated from each LED 20 is directly transmitted to the partition plate 10c of the instrument main body fixed in close contact with the substrate 30 by the screws 50, and further directly transmitted to the main body side wall having a large surface area, which is effective from the outer peripheral surface. The heat is radiated to the outside, and at the same time, the heat is also radiated from the side wall 10i constituting the recess 10j of the instrument body.

  Further, a flow of outside air is generated from one opening 10k of the side wall 10i to the other opening 10k, the inner surface side of the recess 10j is also cooled, and the entire instrument body 10 is effectively cooled.

  As a result, the heat generated from each LED 20 can be dissipated sufficiently effectively, and bright illumination with a predetermined illuminance can be achieved without a decrease in luminous flux.

  Note that heat generated from the electrical components of the power supply unit 60 is also directly radiated from the instrument body 10.

  When further lighting fixtures are installed along the long corridor, the necessary number of lighting fixtures are successively connected by using the feed terminal for the power supply terminal block in the second fixture body 10 '. Install.

  In this case as well, each lighting fixture installed on the ceiling can effectively radiate the heat generated from each LED by the fixture main body itself, and can perform bright illumination with a predetermined illuminance without lowering the luminous flux. .

  As described above, according to the present embodiment, the instrument body 10 is made of aluminum having good thermal conductivity, and the instrument body itself having a large surface area can also be used for the heat radiation action of each LED 20, so that the heat dissipation performance can be improved. it can.

  The LED 30 faces the reflector 40 so that the substrate 30 is disposed between the partition plate 10c, which is a light source arrangement portion in the instrument body, and the reflector, and the reflector 50 is placed from the substantially central portion of the partition plate by the screw 50. Since it is drawn and tightened, the substrate 30 and the partition plate 10c of the instrument body can be closely attached and fixed.

  Thereby, the heat generated from each LED 20 is directly transmitted to the instrument body, and at the same time, a recess 10j is formed at the other end of the instrument body, and the side wall 10i constituting the recess protrudes upward integrally.

Further, since the heat radiation area is increased by extending, the cooling can be performed more effectively.

  Since the support members 90, 90 made of two plate springs made of stainless steel plate material are fixed to the outer peripheral surface of the instrument main body 10, it functions as a kind of heat radiating fin and radiates heat more effectively.

  As a result, the heat generated from each LED 20 can be dissipated sufficiently effectively, and bright illumination with a predetermined illuminance can be achieved without a decrease in luminous flux.

  Further, since the light of the LED 20 is controlled by the reflector 40, a simple and inexpensive configuration without using a complicated and expensive holder mechanism for mechanically holding the lens as in the prior art. With this, reliable optical performance can be demonstrated.

  Since the reflector 40 is pulled and tightened with the screw 50 from the substantially central portion of the partition plate 10c in the instrument body, the tightening force is evenly applied to the reflector and is not distorted. For this reason, there is no fear of impairing the optical performance of the reflector, and the optical performance as designed can be exhibited.

  The reflector 40 is made of synthetic resin so that the substantially central portion and the peripheral portion thereof are contact portions 40f, 40f, and 40f with the substrate 30, so that the stepped portions that are recessed except for the substantially central portion and the peripheral portion By forming the concave portion, it is possible to prevent the shrinkage that tends to occur during resin molding, and it is possible to satisfy the predetermined optical performance by preventing the deformation of the reflector.

  Since the reflector 40 is formed with a stopper for restricting rotation, the optical positioning of the LED and the reflector can be easily and reliably performed simultaneously with the assembling work of the reflector.

  Furthermore, since the reflector 40 is pulled and tightened from the approximate center of the partition plate 10c in the instrument body by the screw 50, the screw head of the screw to be pulled in is on the reflector side, in other words, the surface side where the light is emitted. Never be located.

  Thereby, it becomes possible to take a configuration in which the screw head cannot be visually recognized from the appearance, and it is possible to provide a lighting fixture that does not impair the merchantability.

  Moreover, the board | substrate 30 which has arrange | positioned each LED20, and the reflector 40 can take the structure provided collectively in the surface side of the partition plate 10c in an instrument main body, and nothing can be installed in a back surface side. The part 60 can be installed with a sufficient electrical insulation distance.

  Since the instrument body 10 itself has a heat dissipation function, a separate heat sink is unnecessary, a space is secured on the back side of the LED, and the power supply unit is accommodated without forming a special space for the power supply unit 60. Therefore, a lighting device that is downsized without increasing the size of the entire main body is provided. Furthermore, since the light source of the light source unit A is composed of the LEDs 20, the instrument body 10 can be further downsized.

  A cylindrical insulating sheet 55 is disposed on the inner peripheral surface of the space portion 10f of the instrument body, and the insulating sheet is provided between the outer peripheral surface of the wiring board 60b and the inner peripheral surface of the instrument body 10, that is, on the outer periphery of the power supply unit 60. Since it is interposed, it is possible to achieve electrical insulation with the instrument body which is a non-charging metal part.

Furthermore, since the insulating sheet 55 is engaged with the concave portion 101 of the end plate 10e on the upper end surface to prevent positioning, rotation, and upward displacement, reliable electrical insulation can be achieved. And a safe lighting fixture with an input of 100V is provided.

With these functions and effects, optical performance can be reliably exhibited, heat dissipation performance can be improved while downsizing the fixture body, and a safe lighting fixture can be provided without sacrificing commerciality.

  As described above, in the present embodiment, the circular downlight-type lighting fixture is configured in a plan view in which the LEDs 20 are arranged in a row in a circular shape. However, the square-style Japanese-style downlight illumination is provided by arranging the LEDs on a substantially square substrate. An instrument may be configured.

  Furthermore, you may make it comprise a lightbulb-type lamp | ramp as shown by patent document 2. FIG.

  Each LED 20 is composed of a white LED, but may be composed of LEDs that emit light in red (R), green (G), blue (B), etc., depending on the use of the lighting fixture. Alternatively, they may be mixed to emit light such as a light bulb color, a daylight white color, and a daylight color.

  Although the pair of openings 10k and 10k are formed in the recess 10j of the instrument main body 10, a large number of the side walls 10i may be formed so as to form a radiating fin as shown in FIG.

Although the substrate 30 of the light source unit A is directly adhered and fixed to the partition plate 10c of the instrument body, it may be fixed via a silicone sheet or the like.

  Although this embodiment is configured as a downlight-type lighting fixture for a general house, various types of downlights for facilities such as offices, large business use, and spotlights directly attached to the ceiling, for example. You may comprise as a lighting fixture.

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention.

The perspective view of the lighting fixture which concerns on one Embodiment of this invention. Similarly the longitudinal cross-sectional view of a lighting fixture. Similarly the top view of a lighting fixture. Similarly the bottom view of a lighting fixture. Sectional drawing which follows the AA line of FIG. Sectional drawing which follows the BB line of FIG. Similarly, a reflector and an insulating sheet of a lighting fixture are shown, (a) is a perspective view of the upper surface of the reflector seen from obliquely above, (b) is a perspective view of the lower surface of the reflector seen from obliquely above, and (c) is The perspective view of an insulating sheet. The principal part of a lighting fixture is shown similarly, (a) is sectional drawing which expands and shows the A section of FIG. 2, (b) is sectional drawing which expands and shows the B section of FIG. The power supply circuit diagram in the power supply part of a lighting fixture similarly. Explanatory drawing which shows the state which similarly installed the lighting fixture in the ceiling surface. The perspective view which similarly shows the modification of a lighting fixture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting fixture 10 Appliance main body 10c Light source arrangement | positioning part 20 Light source 30 Board | substrate 40 Reflector 50 Fixing means 60 Power supply part

Claims (6)

An instrument body with a light source arrangement having thermal conductivity;
A substrate on which a light source is arranged;
A reflector that arranges the substrate between the light source arrangement part and controls light of the light source;
Fixing means for tightening from the light source arrangement part side , pulling the reflector to the instrument body, pressing the substrate against the instrument body by the reflector, and fixing the heat generated from the light source to the instrument body;
The lighting fixture characterized by comprising. An instrument body with a light source arrangement having thermal conductivity;
A substrate on which a light emitting diode is disposed;
A reflector that arranges the substrate between the light source arrangement part and controls light of the light emitting diode;
A screw that is tightened from the light source arrangement side to draw the reflector toward the instrument body, presses the substrate toward the instrument body by the reflector, and fixes the heat generated from the light source to be transmitted to the instrument body;
The lighting fixture characterized by comprising.   The lighting device according to claim 1, wherein the reflector has a mortar-shaped through hole, and an end surface of the through hole comes into contact with the substrate when the substrate is pressed toward the device main body.   The lighting fixture according to claim 1, wherein the reflector is formed with a stopper for restricting rotation.   The lighting fixture according to any one of claims 1 to 4, wherein the fixture main body is provided with a translucent cover member and a support made of a spring material for installation on the installation surface.   The lighting apparatus according to claim 1, wherein the reflector has a recess that forms a gap into which the substrate is fitted when the reflector is disposed opposite to the substrate.

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