JP2008186776A - Lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture which can be improved in heat radiation performance with downsizing its main body. <P>SOLUTION: The lighting fixture 10 comprises a light source portion 12 equipped with a light source 11, a power supply portion 13 with a power supply circuit 13a for lighting the light source, a power terminal block 14 having terminals 14b, 14c, and 14d for power cables, supplying electric power to the power supply portion, and a main body 20 which has a supporting portion 20c with the light source portion formed at one end, a mount portion 20e with the power terminal block formed at the other end, a recessed part 20i which is composed of this mount portion and side walls with openings 20j and 20j, and a space 20f for housing the power supply formed inside. <P>COPYRIGHT: (C)2008,JPO&INPIT

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 (see, for example, Patent Document 1).

  Since the light emitting diode is driven by a direct current, a separate power source is required, and since the instrument is required to be small and thin, the power supply unit is configured separately as shown in Patent Document 1. Has been.

Moreover, as a lighting fixture having a built-in power supply unit, a downlight type lighting fixture has been developed (for example, see Patent Document 2).
JP 2005-1000079 A JP 2004-179048 A

  However, since the lighting apparatus shown in Patent Document 1 has a separate power supply unit, a space for installing the power supply unit is required, and installation work is complicated, and the main body of the lighting apparatus is complicated. It is desired to integrate the power supply unit.

  Moreover, in the downlight type lighting fixture shown by patent document 2, a lighting circuit and a terminal block are integrated in the fixture main body, and the power supply part is integrated.

  On the other hand, 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 method has insufficient heat dissipation area, and the size of the heatsink fins and the reflector itself It is necessary to increase the plate thickness and size.

  For this reason, the back side of the heat sink becomes narrow, it becomes impossible to secure a space for accommodating the power supply unit, and the power supply must be placed separately.

  Moreover, even if the power supply unit is accommodated, there arises a problem that the entire apparatus becomes large.

  For this reason, in a lighting fixture that uses a light source such as this type, a light emitting diode, etc., how to realize a lighting fixture that integrates a power source, improves heat dissipation performance, and can be downsized. Has become an important issue.

  The present invention seeks to provide a lighting fixture capable of improving the heat dissipation performance while reducing the size of the fixture body.

  The invention of the lighting apparatus according to claim 1 includes: a light source unit in which a light source is disposed; a power source unit having a power circuit for lighting the light source; a power cable terminal unit, and a power source that supplies power to the power source unit A terminal block; a support unit for disposing a light source unit provided at one end, a mounting unit for disposing a power terminal block provided at the other end, and the mounting unit and side wall, and an opening in the side wall And an instrument main body having a space for accommodating a power source formed therein.

  According to the present invention, the light source portion provided at one end portion is provided with the support portion, the power supply terminal block provided at the other end portion is provided with the attachment portion, and the attachment portion and the side wall. The power supply unit can be integrated, the heat dissipation performance can be improved, and the size can be reduced by the instrument main body having the recess part provided with the opening and the space part for accommodating the power supply part formed inside. A simple lighting fixture.

  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.

  For example, the light source unit has a light emitting surface in a circular shape, a circular shape, a rectangular shape, a polygonal shape, and the like as a whole when the light sources are arranged in a circular shape in a row or concentrically on a disc-shaped wiring board. You may make it comprise.

  You may make it provide light control members, such as a reflector and a lens body, in a light source part.

  The power supply unit is, for example, a disc-shaped wiring board on which electrical components constituting the power supply circuit are mounted and housed in the instrument body, and further, a synthetic resin having electrical insulation, for example, PBT (polybutylene terephthalate) A wiring board may be accommodated in a power supply box constituted by the above, and the power supply box may be accommodated inside the instrument body.

  The fixture body may constitute a downlight-type lighting fixture such as a round shape or a square shape that matches the shape of the light emitting surface of the light source section.

  The recess of the instrument main body is allowed to have all the forms in which the side wall of the recess ensures the heat radiation area of the instrument main body while accommodating or arranging a part or all of the power terminal block.

  The opening of the recess is preferably provided to face the terminal portion of the power terminal block, but may be provided to be spaced apart from the terminal portion.

  The number of openings may be one or two or more, and all forms for allowing outside air to circulate in the recesses while allowing a guide function for drawing in a power cable or the like are allowed.

  Moreover, the material of the instrument body may be composed of aluminum (Al), copper (Cu), iron (Fe), etc. with good thermal conductivity, or may be composed of synthetic resin such as high thermal conductivity resin. All materials for dissipating heat from the light source are acceptable.

 According to a second aspect of the present invention, there is provided a lighting apparatus comprising: a light source unit including a light source composed of a light emitting diode and a reflector; a power source unit including a power circuit for lighting the light source; a terminal unit for a power cable; A power terminal block for supplying power to the part; a support part for disposing the light source part provided at one end part; a mounting part for disposing the power terminal block provided at the other end part; And an instrument main body having a concave portion in which an opening is provided in the side wall, and a space portion for accommodating a power source portion formed therein.

  The reflector may be composed of a white synthetic resin having light resistance and electrical insulation, for example, PBT (polybutylene terephthalate), or a metal such as aluminum.

  According to a third aspect of the present invention, in the lighting fixture according to the first or second aspect, the height of the side wall of the recess is the same as or higher than the release button of the power terminal block.

  The side wall of the recess may be formed by integrally extending the other end portion of the instrument body having a cylindrical shape or the like, or may be configured by attaching a separate side wall by means such as a screw.

  According to a fourth aspect of the present invention, in the lighting fixture according to any one of the first to third aspects, the concave portion is provided with an opening facing the terminal portion.

  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 member made of a spring material for installation on an installation surface. It is characterized by having.

  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 the first aspect of the present invention, the light source portion provided at the one end portion is provided with the support portion, the power supply terminal block provided at the other end portion is provided with the attachment portion, the attachment portion and the side wall, The power source unit is integrated, the heat dissipation performance is improved, and the size is reduced by the instrument main body having the concave portion in which the opening is provided in the side wall and the space portion for accommodating the power source unit formed inside. It is possible to provide a luminaire that can be used.

  In particular, since it is possible to provide a heat radiating action to the instrument body itself having a large surface area, a separate heat sink is not required, and a space portion is secured, so that the power supply portion does not form a special space for the power supply portion. Therefore, it is possible to provide a lighting apparatus that is reduced in size without increasing the size of the entire apparatus main body.

  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 further reduce the size of the fixture body.

  According to the invention of claim 3, the height of the side wall of the recess of the instrument main body is the same as or higher than that of the release button of the power terminal block. Even so, the side wall of the high recess becomes a stopper, so that the power cable or the like is not inadvertently detached, and a safe lighting apparatus can be provided.

  According to the invention of claim 4, since the recess is provided with the opening facing the terminal portion, the outside air can be circulated through the recess while exhibiting a guide function for drawing in the power cable or the like. It is possible to dissipate heat more effectively.

  According to the invention of claim 5, since it is configured to have a translucent cover member and a support made of a spring material for installation on the installation surface, the power supply unit is integrated and the heat dissipation performance is improved. It is possible to provide a downlight type lighting apparatus that can be reduced in size.

  Hereinafter, an embodiment of a lighting fixture 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 in a general house, for example.

  Reference numeral 10 denotes a lighting fixture, which includes a plurality of light sources 11, a light source unit 12 in which the light sources are arranged, a power source unit 13 that lights the light source, a power terminal block 14 that supplies power to the power source unit, and the light source unit 12 at one end. A power supply terminal block 14 is provided, and the power supply unit 13 is housed therein.

  The light source is composed of a light emitting diode 11 (hereinafter referred to as “LED”), and the LED 11 is provided with four white LEDs of the same color, in this embodiment, high luminance and high output, and each LED is unidirectional. 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 light source unit 12 includes the four LEDs 11 and the reflector 12a, and the four LEDs 11 are mounted on a disc-like wiring board 12b having a diameter of about 60 mm and arranged at equal intervals in a concentric manner. The wiring board 12b is formed of a printed board having heat resistance and electrical insulation.

  The reflector 12a is made of a white synthetic resin having light resistance and electrical insulation, such as PBT (polybutylene terephthalate), and is formed in a disk shape having a diameter slightly larger than the diameter of the wiring board 12b. The recess 12c into which the wiring board 12b is fitted is formed on one surface.

  In the reflector 12a, four mortar-shaped through-holes 12e each having a reflecting surface 12d having a paraboloid of revolution are formed at positions facing the four LEDs 11 respectively.

  The LED 11 mounted on the wiring board 12b is disposed with the lower end of the through hole 12e of the reflector facing the LED 11 and assembled by fitting the wiring board 12b into the recess 12c of the reflector 12a. A light source unit 12 having a circular light emitting surface is configured.

  The power supply unit 13 includes a wiring board 13b on which a power supply circuit 13a for lighting each LED 11 is mounted. The power supply circuit absorbs surge to input terminals 13c and 13c connected to a commercial power supply as shown in FIG. A full-wave rectifier 13e composed of a diode bridge is connected in parallel through a varistor 13d for use. Reference numeral 13f is a current fuse, and 13g and 13g are output terminals.

  The wiring board 13b is formed of a disk-shaped printed wiring board, and electrical components constituting the power supply circuit 13a are mounted on both front and back surfaces.

  Among the electric components of the power supply circuit configured as described above, the varistor 13d is arranged on the back side of the wiring board 13b, and the other electric components are arranged on the front side.

  The power supply terminal block 14 is a terminal block for supplying commercial power to the power supply unit 13, and the difference between the two sides of the box 14a made of a synthetic resin having flame resistance and electrical insulation becomes a terminal unit for the power cable. A release button having an insertion port 14b, an insertion port 14c serving as a terminal portion for a feed cable, and an insertion port 14d serving as a terminal portion for an in-appliance lead-in wire, and a release button for releasing the power line and the feed wire on the upper surface of the box 14e.

  The instrument main body 20 is made of aluminum with good thermal conductivity, in which a light source unit 12 and a power terminal block 14 are disposed, and a cylindrical body having both ends opened for accommodating the power source unit 13 therein.

  The instrument body 20 is made of aluminum die-casting and is configured as a cylindrical case member having a substantially circular cross section having openings 20a and 20b at both ends. The light source unit 12 is positioned on the opening 20a side of one end portion inside the cylindrical body. A partition plate 20c serving as a support portion for arranging the light source portion is integrally formed, and a storage portion 20d for storing the light source portion 13 is formed between the opening 20a and the partition plate 20c.

 Furthermore, the opening 20b on the other end side is closed with an end plate 20e that is configured separately. The end plate 20e serves as an attachment portion for disposing the power terminal block 14 of the present invention. The end plate 20e is made of aluminum die-cast, like the appliance body, and is configured as a dish-shaped circular lid. It fits into the opening 20b on the part side, and is fixed using two screws from the side surfaces facing in the radial direction.

 Thereby, the space part 20f which accommodates the power supply part 13 between the partition plate 20c and the end plate 20e is formed.

 In FIG. 2, 20g is a support step for supporting the wiring board 13b of the power supply unit 13 that is integrally formed facing the space 20f side of the partition plate 20c.

 Furthermore, the instrument main body 20 has an opening 20b on the other end side integrally extended in the axial direction of the cylindrical body to form a side wall 20h, and an end serving as a mounting portion for disposing the side wall and the power terminal block 14 A recess 20i is formed by the upper surface of the plate 20e. The instrument body 20 increases the heat radiation area by extending the side wall 20h.

 The recess 20i is a recess for housing the power supply terminal block 14 and supporting the power supply terminal block while protecting the power supply terminal block from external force. The side wall 20h forming the recess is at a position facing an opening 20j communicating with the outside. A pair is provided.

  The openings 20j and 20j are respectively opposed to the power cable insertion port 14b and the feed cable insertion port 14c, which are the terminal portions of the power terminal block 14, and the in-appliance lead-in insertion port 14d. A guide is provided to draw a power cable a, a feed cable b, and the like, which will be described later, into each insertion port, and the outside air is circulated into the recess 20i.

The height h1 of the side wall 20h of the recess is formed so as to be slightly higher than the height h2 of the release button 14e when the power terminal block 14 is supported by the recess 20i by about 2.5 mm in this embodiment. (Fig. 5)
The light source unit 12 and the power supply terminal block 14 are disposed in the instrument body 20 configured as described above, and the power supply unit 13 is accommodated therein.

 That is, the disk-shaped light source unit 12 constructed by assembling the wiring board 12b and the reflector 12a as described above is arranged on one end side of the instrument body 20 so that the wiring board 12b is positioned on the partition plate 20c side. It fits into the formed storage part 20d, and the center part is fastened and fixed with a screw. Thereby, the wiring board 12b of the light source unit 12 is firmly fixed and fixed to the partition plate 20c.

  Further, the wiring board 13b of the power supply unit 13 is inserted into the space 20f formed between the partition plate 20c and the end plate 20e, and the periphery of the wiring board 13b is brought into contact with the support step 20g and fixed with screws. To do.

 At this time, the varistor 13d mounted on the back surface of the wiring board 13b is positioned and accommodated so as to face the partition plate 20c side. Further, a space S having a predetermined size is formed between the wiring board 13b and the partition plate 20c by the support step 20g, and an electrical insulation distance between the partition board 20c made of aluminum and the wiring board 13b is secured.

  As described above, the wiring board 13b of the power supply unit 13 and the wiring board 12b of the light source unit 12 housed in the instrument main body 20 are divided by the lead wires 30 so that the output terminals 13g and 13g of the power supply circuit 13a and the input terminals of the LEDs are the partition plates. It connects via the insertion hole 20k formed in 20c.

  Further, the power terminal block 14 is placed on the upper surface of the end plate 20e of the instrument body 20 and fixed with screws. Further, the end plate 20e to which the power terminal block 14 is fixed is fitted into the opening 20b on the other end portion side of the instrument body so that the power terminal block 14 faces outward, and from the side surface facing in the radial direction. Secure with two screws.

 As a result, the release button 14e of the power terminal block 14 is disposed and supported in a recess 20i formed at the other end of the instrument body 20 in a state about 2.5 mm lower than the side wall 20h of the recess.

 The openings 20j and 20j formed in the side wall 20h of the recess 20i are terminal portions on both sides of the power terminal block 14 so that a guide for drawing a power cable or the like into each insertion port of the power terminal block 14 can be performed. The insertion ports 14b and 14c and 14d are fixed so as to be opposed to the respective openings 20j and 20j.

As described above, the power supply terminal block 14 disposed and supported in the recess 20 i of the instrument body 20 and the wiring board 13 b of the power supply unit 13 are connected to the insertion ports 14 d and 14 d of the power supply terminal block 14 by the instrument lead-in wire 31. The input terminals 13c and 13c of the power supply circuit 13a are connected through an insertion hole 20m formed in the end plate 20e. At this time, the in-instrument lead-in wire 31 is guided by one opening 20j of the recess 20i, bent in a loop shape, and wired. (Fig. 5)
Reference numeral 21 denotes a decorative frame provided in the opening 20a at one end of the instrument main body 20. The decorative frame 21 is formed of a synthetic resin having a ring shape and a substantially L-shaped cross section. 20a is fitted into the outer surface and fixed with rivets or the like.

  Further, a cover member 22 made of a transparent acrylic resin is fitted and fixed to the inner surface of the ring of the decorative frame 21.

  Reference numeral 23 denotes a support, which consists 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 20 so as to face the radial direction. Secure with screws.

  The support made of the leaf spring is inserted into the installation hole 40 of the installation surface A such as the ceiling together with the instrument main body 20 in a state of being bent inward, and returns to the original state by its own elasticity after the insertion. Then, the instrument body 20 is pressed against the inner surface of the installation hole 40 and the instrument body 20 is fixed to the ceiling A by the pressing force. In addition, what is necessary is just to perform operation contrary to the above, when removing.

  As described above, the light source is composed of four LEDs 11, the light source unit 12 is formed at one end, the recess 20i is formed at the other end, the power terminal block 14 is disposed, the power unit 13 is accommodated therein, and the power unit 13 is integrated with the instrument body 20, and is a small downlight driven by AC100V with a height dimension H of about 84mm, a decorative frame diameter dimension D1 of about 88mm, an instrument body diameter dimension D2 of about 65mm, and power consumption of 5W. A shaped luminaire 10 is constructed.

  The lighting fixture 10 having the above-described configuration is used by connecting a single unit or a plurality of units to the ceiling A, which is the 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. 8, two circular installation holes 40 are formed at predetermined positions on the ceiling A. Since the instrument body 20 is small, a small installation hole is sufficient, and the installation is easy.

  The diameter D3 of the installation hole 40 is D3 = D1 <D2, and a circular through hole of about 75 mm is formed in this embodiment. Next, the power cable a previously connected to the commercial power source is inserted into the power cable insertion ports 14 b and 14 b of the power terminal block 14 of the instrument body 20 and connected.

  Similarly, a feeding cable b for a second instrument wired in advance is inserted into and connected to the feeding cable insertion ports 14c and 14c.

  With the cables a and b connected, the support 23 made of a leaf spring of the instrument body 20 is bent inward by hand and inserted into the installation hole 40 together with the instrument body, and the upper surface of the L-shaped ring of the decorative frame 21 Is brought into contact with the ceiling surface A to determine the position.

  In the state where the position is determined, the hand is released from the support tool 23. 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 40, and the instrument main body 20 is fixed to the ceiling A by the pressing force. The cut end of the installation hole 40 is neatly covered with the decorative frame 21.

  At this time, for example, even if the upper surface of the instrument body 20 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 14e of the power terminal block 14 is approximately about the side wall 20h of the recess. Since it is supported in a state where it is lowered by 2.5 mm, the recessed side wall 20h serves as a stopper for these protrusions, and the release button 14e is not inadvertently pressed and the power cable or the like is not disconnected.

 By the way, if there is no recess in the instrument body and the release button protrudes and is supported on the upper surface, when the instrument body is inserted from below the installation hole, these projections hit the release button and are pushed into the power cable There is a risk that the connection will be released by releasing the engagement.

 Next, the other end of the feeding cable b having one end connected to the first instrument body 20 is inserted and connected to the power cable insertion port of the second instrument body 20 '.

  With the feeding cable b connected, it is inserted into the ceiling installation hole 40 in the same manner as the first unit to complete the installation.

  When the two lighting fixtures 10 installed above are turned on, the light emitted from each LED 11 is reflected by the reflecting surface 12d made of the paraboloid of the reflector 12a and spreads downward in a substantially circular shape and emitted. The desired illumination along the longitudinal direction of the corridor is performed.

  Further, the heat generated from each LED 11 is directly transmitted from the wiring board 12b to the partition plate 20c of the instrument main body 20 fixed in close contact, and is also directly transmitted to the main body side wall having a larger surface area, so that it is effectively transmitted 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 20h constituting the recess 20i of the instrument body 20.

  Further, a flow of outside air is generated from one opening 20j of the side wall 20h to the other opening 20j, the inner surface side of the recess 20i is also cooled, and the entire instrument body 20 is effectively cooled.

  As a result, the heat generated from each LED 11 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 13 is also directly radiated from the instrument body 20.

  When further lighting fixtures are installed along the long corridor, the necessary number of lighting fixtures are successively connected in sequence using the feed terminal for the power terminal block in the second fixture body 20 '. Install.

  In this case as well, each of the lighting fixtures installed on the ceiling can effectively radiate the heat generated from the LEDs by the fixture 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 light source unit 12 is formed at one end and the recess 20i is formed at the other end, the power terminal block 14 is disposed, and the power source unit 13 is accommodated therein. The instrument main body 20 made of good aluminum can be directly exposed to the outside, and the instrument main body itself having a large surface area can also be used for the heat radiation action of the LED. 12b is directly transmitted to the partition plate 20c of the instrument main body, which is closely attached and fixed, and further directly transmitted to the side wall of the main body to effectively radiate the heat from the outer peripheral surface to the outside.

  At the same time, a recess 20 i is formed at the other end of the instrument body 20, and a side wall 20 h constituting the recess is integrally formed protruding upward.

  For this reason, it is possible to further secure an area in contact with the outside air, and at the same time, a pair of openings 20j and 20j opposed to a guide such as a power cable are formed on the side wall 20h. The flow of outside air always occurs with respect to the other opening 20j, so that the inner surface of the recess 20i, that is, the inner surface of the side wall 20h of the recess, the upper surface of the end plate 20e, and the power terminal block 14 are also effectively cooled. The entire 20 is cooled more effectively.

  Furthermore, since the support members 23 and 23 made of two plate springs made of a stainless steel plate material are fixed to the outer peripheral surface of the instrument main body 20, it acts as a kind of heat radiating fins and radiates heat more effectively.

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

  At the same time, since the instrument body itself has a heat dissipation function, a separate heat sink is not required, and a space portion 20f is secured on the back surface of the LED, and the power supply portion is accommodated without forming a special space for the power supply portion. Therefore, it is possible to provide a lighting apparatus that is reduced in size without increasing the size of the entire apparatus main body.

  Furthermore, since the light source of the light source unit is composed of LEDs, it is possible to further reduce the size of the instrument body.

  With these operational effects, it is possible to provide a downlight-type lighting fixture with improved heat dissipation performance while reducing the size of the fixture body.

  Further, since the release button 14e of the power terminal block 14 is supported in a state of being lower than the recessed side wall 20h, the recessed side wall serves as a stopper against the protruding object, and the release button is inadvertently pressed to disconnect the power cable and the like. It is possible to provide a downlight-type lighting fixture that is safe and easy to install.

  Further, the side wall 20h of the recess 20i is formed with the openings 20j and 20j that contribute to the heat dissipation action of the LED 11, thereby providing a guide for the power cable and the lead-in wire in the instrument, making it easier to construct, It is possible to provide a downlight type lighting apparatus that exhibits a guide function and has an excellent heat dissipation effect.

  Moreover, the light source unit 12, the power source unit 13, and the power terminal block 14 may be assembled by sequentially inserting and fitting in the axial direction of the cylinder with respect to the instrument body 20 forming the cylinder, and the structure is simple. In addition, it is possible to provide a downlight-type lighting fixture that can be easily assembled.

  Further, the varistor 13 d of the power supply unit 13 is incorporated so as to face the partition plate 20 c side of the instrument body 20. For this reason, even if the varistor is damaged due to an abnormal situation, the partition plate 20c of the instrument body, which is strong aluminum, is present below, preventing the instrument itself from being damaged and providing a lighting apparatus that is safe. .

  As described above, in the present embodiment, the circular downlight-type lighting fixture is configured in a plan view in which the LEDs 11 are arranged in a row in a circular shape. However, the LEDs are arranged on a substantially square wiring board to form a square Japanese-style downlight. You may comprise a lighting fixture.

  Each LED 11 is configured with a white LED, but may be configured with an LED that emits light in red (R), green (G), blue (B), or the like, depending on the application 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 20j and 20j are formed in the recess 20i of the instrument body 20, a large number of side walls 20h may be formed so as to be in the shape of radiating fins as shown in FIG.

 Although the wiring board 12b of the light source unit 12 is fixed in direct contact with the partition plate 20c of the instrument body 20, it may be fixed through 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. 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 10 Lighting fixture 11 Light source 12 Light source part 12a Reflector 13 Power supply part 13a Power supply circuit 14 Power supply terminal block 14b, 14c, 14d Terminal part 14e Release button 20 Instrument main body 20c Support part 20e Attachment part 20f Space part 20h Side wall 20i Concave part 20j Opening part 22 Cover member 23 Support tool A Installation surface

Claims (5)

A light source section in which a light source is disposed;
A power supply unit having a power supply circuit for lighting the light source;
A power supply terminal block having a power cable terminal and supplying power to the power supply;
It is composed of a support part for disposing a light source part provided at one end part, an attachment part for disposing a power terminal block provided at the other end part, this attachment part and a side wall, and an opening part is provided on the side wall. An instrument body having a recess and a space for accommodating a power source formed therein;
The lighting fixture characterized by comprising. A light source composed of a light emitting diode and a light source part in which a reflector is disposed;
A power supply unit having a power supply circuit for lighting the light source;
A power supply terminal block having a power cable terminal and supplying power to the power supply;
It is composed of a support part for disposing a light source part provided at one end part, an attachment part for disposing a power terminal block provided at the other end part, this attachment part and a side wall, and an opening part is provided on the side wall. An instrument body having a recess and a space for accommodating a power source formed therein;
The lighting fixture characterized by comprising. The lighting fixture according to claim 1 or 2, wherein the height of the side wall of the recess is the same as or higher than the release button of the power terminal block. The lighting device according to claim 1, wherein the concave portion is provided with an opening portion facing the terminal portion. 5. The illumination according to claim 1, wherein the instrument main body includes a translucent cover member and a support made of a spring material for installation on a surface to be installed. Instruments.

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