JP2014146503A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which enables relatively easy change of a light outgoing direction and has appearance design exhibiting excellent unity of an arm and a lamp fitting body.SOLUTION: A lighting device 10 includes: a lamp fitting body 2 including a storage part 21 which stores an LED light source part 1 and a heat radiation part 22 which radiates heat from the LED light source part 1; a power source device 3 which supplies electric power to the LED light source part 1 and allows the LED light source part 1 to light; and an arm 4 which connects the lamp fitting body 2 with the power source device 3. The lamp fitting body 2 stores a fitting base 5 in a recess 23 of the lamp fitting body 2. The arm 4 may rotate relative to the fitting base 5 and may be stored in the fitting base 5.

Description

  The present invention relates to a luminaire including an LED as a light source.

  Conventionally, lighting fixtures using LEDs as light sources have been used. Compared with light sources such as incandescent bulbs and fluorescent lamps, LEDs can be reduced in size, weight, and power consumption, and can easily increase directivity.

  This type of lighting fixture includes a fixture main body 1015 having an LED, a power supply unit 1024 having a built-in LED lighting circuit, and an arm member 1018 that connects the fixture main body 1015 and the power supply unit 1024, as shown in FIG. Is known (see Patent Document 1).

  In the lighting fixture 1010 of Patent Document 1, the fixture main body 1015 serving as the lamp main body is rotatably attached to both ends of the U-shaped arm member 1018 by the arm support portion 1017. The arm support portion 1017 passes the bolts through the through holes at both ends of the arm member 1018, and screws the bolts into the nuts on the side surface of the instrument main body 1015 to fix the arm member 1018 and the instrument main body 1015. The lighting fixture 1010 can change the light emission direction by adjusting the angle of the fixture body 1015 with respect to the arm member 1018. Note that the lighting fixture 1010 of Patent Document 1 includes a connection portion 1025 on the upper surface of the power supply portion 1024. The luminaire 1010 is installed along the longitudinal direction of the wiring guide 1026 so that electrical connection is made in a state where the connection portion 1025 is slidable.

JP 2010-73654 A

  By the way, as for the lighting fixture 1010 of patent document 1, the both ends of the arm member 1018 are clamped by the volt | bolt and the fixture main body 1015 side, respectively. The lighting fixture 1010 needs to be adjusted by adjusting the angle of the fixture body 1015 and tightening the bolts on the fixture body 1015 side at both ends of the arm member 1018, and changing the light emission direction is complicated. It becomes. Moreover, since the lighting fixture 1010 of patent document 1 is supporting the fixture main body 1015 with the U-shaped arm member 1018, there was no sense of unity with the arm member 1018 and the fixture main body 1015, and the external appearance design was impaired. .

  The present invention has been made in view of the above reasons, and its purpose is to make it relatively easy to change the direction of light emission and to make the appearance design with a high sense of unity between the arm and the lamp body. It is to provide a luminaire.

  The luminaire of the present invention has a lamp body having a housing part for housing the LED light source part and a heat radiating part for radiating heat from the LED light source part, and supplies power to the LED light source part to light the LED light source part. A lighting device comprising a power supply device and an arm connecting the lamp body and the power supply device, wherein the lamp body houses a mounting base in a recess of the lamp body, and the arm is mounted on the mounting body. It is rotatable with respect to the base and can be stored in the mounting base.

  In this lighting fixture, the mounting base is formed in a state where the outer surface of the mounting base is flush with the outer surface of the lamp body in a state where the mounting base is housed in the recess of the lamp body. It is preferable that the outer surface of the arm forms a surface flush with the outer surface of the mounting base in a state where the arm is housed in the mounting base.

  In this lighting apparatus, it is preferable that the arm has a power cord storage portion that can store a power cord for supplying power from the power supply device to the LED light source portion.

  In this lighting apparatus, the arm has a pair of shaft portions that can rotate with respect to the mounting base, and the shaft portions are sandwiched and held between a bearing portion and a spring material provided on the mounting base. It is preferable that the spring material adjusts the force for pressing the shaft portion.

  In the lighting fixture of the present invention, the mounting base is accommodated in the recess of the lamp body, and the arm can be rotated with respect to the mounting base, and the light emission direction can be changed by a configuration that can be stored in the mounting base. It is relatively easy to achieve an exterior design with a high sense of unity between the arm and the lamp body.

It is an external appearance perspective view which shows the lighting fixture of this embodiment. It is a schematic sectional drawing which shows the lighting fixture of this embodiment. It is side surface explanatory drawing which shows the lighting fixture of this embodiment and demonstrates operation | movement of a lamp main body. It is explanatory drawing explaining the principal part in the lighting fixture of this embodiment. It is an external appearance perspective view which shows the principal part in the lighting fixture of this embodiment. It is an external appearance perspective view which shows another principal part in the lighting fixture of this embodiment. It is a perspective view which shows the state which installed the conventional lighting fixture in the wiring guide.

  Hereinafter, the lighting fixture 10 of this embodiment is demonstrated based on FIG. 1 thru | or FIG. In addition, the same number is attached | subjected to the same member in the figure.

  The lighting fixture 10 of this embodiment is provided with the lamp main body 2 which has the accommodating part 21 which accommodates the LED light source part 1, and the thermal radiation part 22 which radiates the heat | fever from the LED light source part 1 as shown in FIG. . The luminaire 10 includes a power supply device 3 that supplies power to the LED light source unit 1 to light the LED light source unit 1, and an arm 4 that connects the lamp body 1 and the power supply device 3. The lamp body 2 accommodates the mount 5 in the recess 23 of the lamp body 2 (see FIG. 2). The arm 4 is rotatable with respect to the mount 5 and can be stored in the mount 5 (see FIG. 3).

  Thereby, the lighting fixture 10 of this embodiment can change a light emission direction comparatively easily, and can set it as the external appearance design with a high unity feeling of the arm 4 and the lamp main body 2. FIG.

  Hereinafter, the specific structure of the lighting fixture 10 of this embodiment is demonstrated. More specifically, the lighting fixture 10 of the present embodiment constitutes a spotlight that can be lit up or the like by attaching the power supply device 3 to a ceiling material or a wall material side that is a building construction material. doing.

  The lighting fixture 10 of this embodiment is provided with the LED light source part 1 which has several LED11, and the lamp main body 2 holding the LED light source part 1 inside. The LED light source unit 1 includes a disk-shaped wiring board 12, and the LED 11 is mounted on one surface 12 a side of the wiring board 12.

  The lamp body 2 includes a storage unit 21 that stores the LED light source unit 1 and a heat dissipation unit 22 that radiates heat from the LED light source unit 1 to the outside. The lamp body 2 integrally includes a bottomed cylindrical storage portion 21 having a recess 21 a for storing the LED light source portion 1, and a bottomed cylindrical heat dissipation portion 22 having a recess 22 a on the opposite side of the storage portion 21. As prepared. In the lamp body 2, the outer shape of the entire lamp body 2 is formed into a columnar shape by integrating the storage portion 21 and the heat dissipation portion 22. The lamp body 2 uses a unit in which the storage unit 21 and the heat dissipation unit 22 are integrally formed. However, the lamp body 2 may be configured by combining the storage unit 21 and the heat dissipation unit 22 separately. . In the lamp body 2, for example, aluminum, stainless steel, copper, iron, or the like can be used as the material of the storage unit 21 or the heat dissipation unit 22. In addition, the thermal radiation part 22 is provided with the cover 24 which covers the recessed part 22a. In the luminaire 10, the LED light source unit 1 in which the LEDs 11 are mounted on the wiring board 12 is held in a storage unit 21 made of a metal material.

  The luminaire 10 holds the LED light source unit 1 in the housing unit 21 integrated with the heat radiating unit 22, thereby reducing the size of the lamp body 2 and generating heat generated in the LED light source unit 1 from the lamp body 2 to the outside. It is possible to efficiently dissipate heat. The lighting fixture 10 of this embodiment can suppress the temperature rise of the LED light source part 1 by improving the heat dissipation of the lamp main body 2, and can also improve the light output from the LED light source part 1. FIG.

  The lighting fixture 10 includes a power supply device 3 that can be fixed to a ceiling material (not shown). The power supply device 3 includes a power supply unit 32 that constitutes a lighting circuit that can be turned on by supplying power to the LED light source unit 1. In the power supply device 3, a power supply unit 32 is arranged inside a casing 31 whose outer shape is a rectangular parallelepiped. The luminaire 10 includes a long arm 4 that connects the lamp body 2 and the power supply device 3. The lighting fixture 10 has one end 401 side of the arm 4 attached to the housing 31 of the power supply device 3. In the lighting fixture 10, the other end 402 side opposite to the one end 401 side of the arm 4 is attached to the lamp body 2.

  The luminaire 10 of the present embodiment holds the LED light source unit 1 on the inner bottom surface of the recess 21 a of the storage unit 21. The lighting fixture 10 includes a frame body 13 so as to cover the one surface 12a side of the wiring board 12 in front of the light emitting side of the LED 11. The frame part 13 is preferably used for storing and holding the LED light source part 1 in the storage part 21 of the lamp body 2. The frame body portion 13 suppresses the appearance of the appearance design from being impaired by the screw head of a fixing screw (not shown) holding the LED light source portion 1 in the storage portion 21 being visible from the outside of the lighting fixture 10. It becomes possible to do. The frame body portion 13 can be formed using a metal material such as aluminum or a synthetic resin material. The frame body portion 13 has a disk shape and is provided with a plurality of (here, 18) openings 13a. The lighting fixture 10 takes out the light of the LED 11 from the opening 13 a of the frame body portion 13. The LED light source unit 1 holds a lens 14 disposed in front of the LED 11 by a frame body unit 13. The frame body portion 13 holds the lens 14 at the inner end portion of the opening 13 a of the frame body portion 13. In the luminaire 10, the frame portion 13 that holds the lens 14 is housed in the recess 21 a of the housing portion 21 and fixed to the inner bottom surface side of the housing portion 21. The lens 14 is suitably provided to make the light from the LED 11 have a predetermined light distribution. For the lens 14, for example, glass, acrylic resin, or the like can be used as the material of the lens 14. The lens 14 is formed in a plano-convex lens shape having a concave portion 14a surrounding the LED 11 mounted on one surface 12a of the wiring substrate 12 on the wiring substrate 12 side and a surface 14b having a smooth surface opposite to the concave portion 14a. . The luminaire 10 is configured such that light from the LED 11 is incident on the lens 14 and is refracted by the lens effect of the lens 14 to irradiate the light emitted from the LED 11 with a predetermined light distribution.

  The luminaire 10 includes a rod-shaped arm 4 made of a metal material. In the arm 4, one end 401 side of the arm 4 is held on the housing 31 side of the power supply device 3. The arm 4 holds the lamp body 2 on the other end 402 side opposite to the one end 401. The arm 4 is provided with a columnar shaft portion 41 protruding outward from the side surface 403 of the arm 4 on the other end 402 side of the arm. The shaft portion 41 is a first cylindrical body 41a having a cylindrical shape, and a second cylindrical body made of a part of a cylinder having the same central axis as the central axis of the first cylindrical body 41a and a larger outer shape than the first cylindrical body 41a. 41b (see FIGS. 4 and 5). In other words, the shaft portion 41 is configured such that a part thereof is recessed from the peripheral surface of the second cylindrical body 41b and the peripheral surface of the first cylindrical body 41a is exposed. In the shaft portion 41, the peripheral surface of the first cylindrical body 41a is exposed to the outside from the peripheral surface of the second cylindrical body 41b, for example, at an angle of 120 degrees with respect to the central axis of the second cylindrical body 41b. In the arm 4, the shaft portion 41 is held on the mounting base 5 side. The mount 5 can be accommodated in the recess 23 of the lamp body 2, and the outer surface 511 of the mount 5 is flush with the outer surface 211 of the lamp body 2 in a state where the mount 5 is accommodated in the lamp body 2. The surface is formed. The mount 5 is C-shaped when viewed from the outer surface 511 side, and integrally includes a base portion 52a and a pair of holding frames 52b that protrude from both ends of the base portion 52a. The mounting base 5 allows the other end 402 side of the arm 4 to be inserted between the pair of holding frames 52b. In other words, the mounting base 5 is held by the mounting base 5 by inserting the arm 4 into the mounting base 5 in a C-shaped recess so as to be sandwiched between the pair of holding frames 52b. The mounting base 5 can store the arm 4, and the outer surface 511 of the mounting base 5 is flush with the outer surface 411 of the arm 4 in a state where the arm 4 is stored in the mounting base 5.

  That is, in the lighting fixture 10 of the present embodiment, the mounting base 5 is formed so that the outer surface 511 of the mounting base 5 is flush with the outer surface 211 of the lamp main body 2 in a state where the mounting base 5 is housed in the recess 23 of the lamp main body 2. ing. In the arm 4, the outer surface 411 of the arm 4 is flush with the outer surface 511 of the mounting base 5 when the arm 4 is stored in the mounting base 5. Thereby, the lighting fixture 10 of this embodiment can be set as the external appearance design in which the sense of unity between the arm 4 and the lamp body 2 is further increased in a state where the arm 4 is housed in the mounting portion 5.

  The luminaire 10 of the present embodiment has an external AC power source (for example, a commercial power source) and a power source through an electric wire (not shown) through a through hole (not shown) penetrating the casing 31 of the power supply device 3. The unit 32 is electrically connected. Moreover, the lighting fixture 10 is comprised so that electric power can be supplied to the LED light source part 1 from the power supply unit 32 via the power cord 7 (refer FIG. 6).

  The arm 4 has a C shape in a cross section along a direction perpendicular to the longitudinal direction of the arm 4. The arm 4 houses a power cord 7 in a recess in the C shape. The arm 4 includes a semi-cylindrical protrusion 43 that protrudes from the inner surface of the recess in the C-shape. The protrusion 43 partially narrows the space in the recess. In the lighting fixture 10, the protrusion 43 is appropriately provided in the recess of the arm 4 in order to hold the power cord 7 between the protrusion 43 and the inner surface of the recess facing the protrusion 43. The arm 4 can be appropriately provided with a plurality of protrusions 43 along the longitudinal direction of the arm 4 according to the length of the arm 4 in the longitudinal direction.

  That is, the arm 4 has a power cord storage portion 42 that can store the power cord 7 that supplies power from the power supply device 3 to the LED light source portion 1. Since the power cord 7 is housed in the power cord housing portion 42 of the arm 4 and the lighting fixture 10 is not exposed to the outside of the lighting fixture 10, it is possible to prevent the appearance design from being damaged.

  In the lighting fixture 10 of the present embodiment, the mounting base 5 includes the bearing portions 51 that hold the shaft portions 41 of the arms 4 on the holding frames 52 b on both sides of the arms 4. The bearing portion 51 has a shape recessed in a semi-cylindrical shape on the back surface 512 side opposite to the outer surface 511 of the mounting base 5. In the bearing portion 51, the inner surface of the bearing groove 51 a recessed in a semi-cylindrical shape has a slightly larger shape than the outer periphery of the second cylindrical body 41 b of the shaft portion 41. The bearing portion 51 includes a protrusion 51b that protrudes from the inner surface side of the bearing groove 51a that is recessed in a semi-cylindrical shape. The bearing portion 51 allows the shaft portion 41 of the arm 4 to turn around the shaft portion 41, and the protrusion 51 b abuts against the second cylindrical body 41 b of the shaft portion 41, thereby rotating the shaft portion 41 around a predetermined portion. It serves as a detent that suppresses the angle range. In the arm 4, a part of the second cylindrical body 41 b protrudes from the back surface 512 side of the mounting base 5 with the shaft portion 41 being accommodated in the bearing groove 51 a (see FIGS. 4 and 5). The arm 4 includes a spring material 6 that presses and presses the second cylindrical body 41 b protruding from the back surface 512 side of the mounting base 5 toward the mounting base 5 in a state where the shaft portion 41 is housed in the bearing section 51. The spring material 6 is held on the back surface 512 side of the mounting base 5 by a screw (not shown). The spring material 6 is configured by a plate material whose outer shape is a C-shape so that the spring material 6 can be held on the back surface 512 side of the mounting base 5. The spring material 6 includes a base portion 61 and a pair of extending portions 62 and 62 extending from both ends of the base portion 61. In addition, the spring member 6 includes a protruding plate 63 that protrudes in a direction perpendicular to the surface of the plate-like base portion 61 at the base portion 61 between the pair of extending portions 62 and 62. The protruding plate 63 can fulfill the function of guiding the power cord 7 led out from the power cord storage portion 42 of the arm 4 to the lamp body 2 side.

  Each extending portion 62 includes a curved portion 621 that is curved outward and away from the mounting base 5 side in the central portion of the extending portion 62 in the extending direction. The extending portion 62 includes a distal end portion 622 on the opposite side of the base portion 61 via the curved portion 621. The spring member 6 is provided with an insertion hole 62a through which a first screw (not shown) for fixing the spring member 6 is inserted on the back surface 512 side of the mounting base 5 at the tip portion 622. Further, the spring member 6 is provided with an insertion hole 61 a through which a second screw (not shown) is inserted at the center of the base 61. The spring material 6 passes through the insertion hole 61a of the base 61 through the second screw that is inserted from the hole 50a (see FIGS. 1 and 4) on the outer surface 511 side of the mounting base 5 to the mounting base 5 side. Holding. The spring material 6 can hold | maintain the spring material 6 to the mount 5 side by the said 2nd screw and the nut which is not shown in figure, for example. The spring material 6 may be held on the mounting base 5 side by screwing a female screw into the insertion hole 61a and using the second screw serving as the male screw and the female screw of the spring material 6. The spring material 6 can adjust the force of pressing the shaft portion 41 toward the mounting base 5 by adjusting the distance between the spring material 6 and the mounting base 5 with the second screw. The curved portion 621 is in contact with the second cylindrical body 41b of the shaft portion 41, and can hold the second cylindrical body 41b by pressing it toward the mounting base 5 so that the shaft portion 41 can rotate. Accordingly, the spring material 6 is formed at three locations by the two first screws screwed to the back surface 512 side of the mounting base 5 and the second screw inserted from the outer surface 511 side of the mounting base 5. It can be held on the mount 5. In the lighting fixture 10 of this embodiment, the shaft portion 41 of the arm 4 abuts against the mounting base 5 side and the spring material 6 so that the heat from the LED light source portion 1 is conducted to the arm 4 side and is transferred to the arm 4. It is possible to radiate heat from the outside.

  By the way, in the lighting fixture 10, by comprising the lamp main body 2 with the metal material excellent in heat dissipation, a weight becomes heavier compared with the case where the lamp main body 2 is comprised with a resin material etc. Moreover, the lighting fixture 10 of this embodiment hold | maintains the axial part 41 of the arm 4 with the attachment stand 5, and accommodates the attachment stand 5 in the hollow 23 of the lamp body 2 so that the gravity center of the lamp body 2 can be relatively arbitrarily selected. The position can be designed. Thereby, the lighting fixture 10 of this embodiment provides the axial part 41 of the arm 4 in the outer surface 211 side of the lamp main body 2, and makes it easy to rotate the lamp main body 2 using the weight of the lamp main body 2. be able to.

  Moreover, in the lighting fixture 1010 of Patent Document 1 described above, if the tightening direction for fixing the bolt and the rotation direction for adjusting the angle of the fixture main body 1015 are the same direction, the fixture main body 1015 is fixed when the fixture main body 1015 is fixed. There is a possibility that 1015 rotates and deviates from a predetermined light emitting direction.

  On the other hand, the lighting fixture 10 of this embodiment presses the spring material 6 from the direction perpendicular to the rotation direction of the shaft portion 41 by screwing the spring material 6 to the mounting base 5 side by the second screw. ing. The lighting fixture 10 of this embodiment press-contacts the axial part 41 and the spring material 6, and the axial part 41 and the bearing part 51 by screwing the said 2nd screw of one place, respectively. Moreover, the lighting fixture 10 of this embodiment can perform the retightening which suppresses rotation of the lamp main body 2 at one place. In other words, the lighting fixture 10 of the present embodiment can suppress the rotation of the lamp body 2 even when the second screw is tightened when the lamp body 2 is fixed, and the lamp body 2 is fixed in a predetermined light emitting direction. It becomes easy.

  In the lighting fixture 10 of the present embodiment, the shaft portion 41 of the arm 4 is sandwiched between the bearing portion 51 of the mounting base 5 and the spring material 6, and the spring material 6 is moved closer to the mounting base 5 side by the second screw. By bringing them closer, the shape of the spring material 6 is deformed. The lighting fixture 10 deforms the shape of the spring material 6 to increase the frictional force between the shaft portion 41 and the bearing portion 51 and between the shaft portion 41 and the spring material 6. It becomes possible to suppress rotation around the portion 41. In other words, the luminaire 10 includes a spring force adjusting portion that adjusts the force of the spring material 6 by the second screw that engages the spring material 6 with the mounting base 5, the spring material 6, and the mounting base 5. It is composed.

  The power supply device 3 includes a rectangular parallelepiped casing 31. For the housing 31, for example, aluminum or stainless steel can be used as the material of the housing 31. The casing 31 may fix the one end 401 side of the arm 4 to the fixing surface 30 a of the casing 31. The housing 31 may be configured so that the arm 4 can rotate with respect to the fixed surface 30a of the housing 31 along a surface parallel to the fixed surface 30a. That is, the power supply device 3 may fix the arm 4 to the power supply device 3 in a rotatable manner. The housing 31 includes a plurality of fins 31 a parallel to the fixed surface 30 a along the side peripheral surface 30 b of the housing 31. The lighting fixture 10 of this embodiment can make it easy to radiate the heat generated in the power supply unit 32 to the outside because the housing 31 includes a plurality of fins 31a. Moreover, the lighting fixture 10 of this embodiment is provided with a plurality of fins 31a in the casing 31 even if heat from the lamp body 2 is transferred to the casing 31 via the arm 4. Further, heat can be easily radiated from the casing 31 to the outside.

  The lighting fixture 10 of the present embodiment is inclined with respect to the fixing surface 30a from the position shown in FIG. 3A of the lamp body 2 in which the light emission direction is a direction along the direction perpendicular to the fixing surface 30a of the power supply device 3. It can fix suitably between the positions shown in FIG.3 (b) of the lamp main body 2 made into a light-projection direction. Thereby, the lighting fixture 10 of this embodiment can change a light emission direction comparatively easily.

  Hereinafter, each structure of the lighting fixture 10 of this embodiment is demonstrated in detail.

  The LED light source unit 1 serves as a light source of the lighting fixture 10 and includes at least one LED 11. The LED 11 is a semiconductor light emitting element capable of irradiating light by power feeding. The LED 11 can be configured to include, for example, an LED chip that emits blue light or ultraviolet light, and a particulate phosphor that emits light having a longer wavelength when excited by light energy emitted from the LED chip. . Examples of the phosphor include phosphors that emit yellow light having a broad emission wavelength range excited by blue light, and three types of phosphors that can emit blue, green, and red when excited by ultraviolet rays. . The LED 11 can irradiate mixed color light such as white light by including an LED chip that emits blue light and a phosphor that emits yellow light that is excited by the blue light and has a broad emission wavelength range. LED11 can be set as the structure which coat | covers a LED chip with the dome-shaped color conversion member in which fluorescent substance contained in translucent resin.

As the LED 11, for example, an LED chip using a gallium nitride compound semiconductor such as InGaN that emits blue light to the light emitting layer can be used. The LED 11 is, for example, a silicate system doped with a rare earth such as (Sr, Ba) ₂ SiO ₄ activated with Eu as a phosphor that absorbs blue light and emits a complementary yellow light. These phosphors can be used. The LED 11 is doped not only with a doped silicate-based phosphor, but also with a rare earth such as Y ₃ Al ₅ O ₁₂ activated with Ce or Tb ₃ Al ₅ O ₁₂ activated with Ce. An aluminate-based phosphor can be used.

  LED11 is good also as a structure provided with the translucent member which does not contain fluorescent substance instead of using the said color conversion member. The LED 11 can also emit white light by a configuration including a red LED chip that emits red light, a green LED chip that emits green light, and a blue LED chip that emits blue light. The LED 11 can be surface-mounted and electrically connected to the wiring provided on the one surface 12a of the wiring board 12 by reflow soldering or the like.

  The LED 11 may be an LED chip that becomes a bare chip, or may be a surface-mount type light emitting diode that is covered with a package such as a synthetic resin and is provided with a lead terminal for power supply outside. A plurality of LEDs 11 can be provided on the one surface 12a of the wiring board 12 as desired. Each LED 11 is electrically connected in series, in parallel or directly using the wiring on the one surface 12a side of the wiring board 12. You may connect in parallel. The LEDs 11 on the one surface 12a side of the wiring board 12 can be appropriately arranged in a matrix shape, a staggered shape, a circular shape or the like in plan view. Further, although not shown, the LED light source unit 1 may include a plurality of Zener diodes connected to each LED 11 in parallel on the wiring board 12. The LED light source unit 1 can suppress the occurrence of electrostatic breakdown or the like in the LED 11 by connecting each Zener diode in parallel with each LED 11.

  In the lighting fixture 10 of the present embodiment, the LED light source unit 1 includes a plurality of (here, 18) LEDs 11 mounted on one wiring board 12 to constitute an LED unit. The LED light source unit 1 has a relatively small amount of heat generated by each LED 11 in a state where each LED 11 is turned on, but the amount of heat generated by the LED light source unit 1 increases as the number of LEDs 11 increases. Therefore, the LED light source unit 1 tends to increase the temperature of the entire LED light source unit 1.

  In the lighting fixture 10, the temperature of the LED 11 itself increases due to the heat generated by the LED 11 when the LED light source unit 1 is turned on. The LED 11 has characteristics that when the temperature of the LED 11 itself becomes too high, the life of the LED 11 is rapidly shortened due to thermal degradation.

  The LED light source unit 1 thermally couples the other surface 12b side of the wiring board 12 opposite to the one surface 12a of the wiring board 12 on which the LED 11 is mounted to the base part 21b protruding from the inner bottom surface side of the storage unit 21. It is implemented in the form. Thereby, the lighting fixture 10 can efficiently conduct heat generated in the LED light source unit 1 to the lamp body 2 side. In addition, you may fix the LED light source part 1 on the base part 21b of the accommodating part 21 through the insulating layer which is excellent in heat conductivity and has electrical insulation, for example. The lighting fixture 10 may be provided with a plurality of reflecting portions (not shown) on the one surface 12a side of the wiring board 12 in order to individually control the light distribution of the light emitted from the plurality of LEDs 11. .

  The lamp body 2 includes a storage unit 21 that can store the LED light source unit 1 and a heat dissipation unit 22 that can radiate heat generated by the LED light source unit 1 to the outside. In the lamp body 2, a housing portion 21 that houses the LED light source portion 1 and a cylindrical heat radiating portion 22 are integrally fixed. The lamp body 2 includes a recess 23 that can accommodate the mount 5 to which the arm 4 is attached. The lamp body 2 is connected to the arm 4 via the mount 5.

  The lamp body 2 can be made of a metal material (for example, aluminum, stainless steel, copper, iron, etc.) or various resin materials as the material of the lamp body 2. The lamp body 2 is preferably made of a metal material having high thermal conductivity as the material of the lamp body 2. The lamp body 2 can efficiently dissipate the heat generated in the LED light source unit 1 to the outside by configuring the lamp body 2 with a metal material as compared with the lamp body 2 formed with a resin material. The lamp body 2 is formed in a cylindrical shape as an outer shape, but is not limited to a cylindrical shape, and may be a rectangular parallelepiped shape.

  The lamp main body 2 is held by a mounting base 5 that supports a shaft portion 41 provided on the other end 402 side of the arm 4, and the lamp main body 2 is regulated with respect to the arm 4 at a predetermined angle (for example, 120 It can be rotated within the range of degrees. The luminaire 10 has the second screw inserted through the hole 50a on the outer surface 511 side of the attachment portion 5 having a flush surface continuous with the outer surface 211 of the lamp body 2 with the lamp body 2 of the attachment portion 5. On the back surface 512 side, the spring material 6 constituting the leaf spring is screwed together. In the lighting fixture 10, friction occurs on the contact surface between the shaft portion 41 of the arm 4 and the bearing portion 51 of the mounting portion 5, and the contact surface between the shaft portion 41 of the arm 4 and the curved portion 621 of the spring material 6. It is comprised so that rotation may be suppressed. The lamp body 2 includes an insertion hole (not shown) through which the power cord 7 for feeding power to the LED light source unit 1 led out from the arm 4 is inserted. The lamp body 2 also includes an insertion hole (not shown) through which the power cord 7 for feeding power to the LED light source unit 1 led out from the arm 4 is inserted.

  The power supply device 3 can supply power to the LED light source unit 1. The power supply device 3 includes a power supply unit 32 that drives the LED light source unit 1 to light. The power supply unit 32 includes a lighting circuit capable of lighting the LED light source unit 1 based on electric power supplied from an external commercial power source or the like. The lighting circuit rectifies AC power supplied from an external commercial power source (not shown), and then smoothes and smoothes and outputs a DC current, and DC from the rectifying and smoothing unit It can be set as the structure provided with the constant current power supply part (not shown) for supplying an electric current to LED11 as a fixed electric current.

  In the power supply device 3, the power cord 7 led out from the power supply unit 32 passes through the insertion holes of the power cord storage portion 42 of the arm 4, the heat radiation portion 22 of the lamp body 2, and the storage portion 21. It is electrically connected to the wiring. The power supply device 3 is not only fixed to a ceiling material (not shown), but may be embedded in the wall so that the arm 4 protrudes from the wall surface.

  The arm 4 is capable of connecting the lamp body 2 and the power supply device 3. The arm 4 can be made of, for example, a metal material or a resin material as the material of the arm 4. The arm 4 is preferably made of a metal material having high thermal conductivity such as aluminum, stainless steel, copper, or iron from the viewpoint of heat dissipation and mechanical strength. The arm 4 is made of, for example, a metal and is formed in an elongated shape, and can be fixed to the power supply device 3. In the lighting fixture 10 of this embodiment, heat from the LED light source unit 1 is conducted through the storage unit 21, the heat radiating unit 22, the mounting base 5, and the arm 4 of the lamp body 2, and can be radiated to the outside. . Thereby, the lighting fixture 10 has ensured the lifetime of LED11 by maintaining the temperature of LED11 of the LED light source part 1 below predetermined | prescribed allowable temperature. The arm 4 has the other end 402 side of the arm 4 coupled to the lamp body 2 on the lamp body 2 side so as to be rotatable around the shaft portion 41. The lighting fixture 10 can change the light emission direction, and can appropriately adjust the direction of the lamp body 2 according to the target position of the illumination target. The arm 4 includes shaft portions 41 that protrude from both side surfaces 403 of the arm 4 on the other end 402 side of the arm 4. The arm 4 has a C-shape of the arm 4 in a cross section perpendicular to the longitudinal direction of the arm 4, and the power cord 7 is accommodated in the C-shaped recess of the arm 4. In the arm 4, a C-shaped recess constitutes a power cord storage portion 42, and forms a through path for the power cord 7. In other words, the arm 4 has a power cord storage portion 42 that can store the power cord 7 that feeds power from the power supply device 3 to the LED light source portion 1.

  The arm 4 has a pair of shaft portions 41 that are rotatable with respect to the mounting base 5, and the shaft portions 41 are sandwiched and held between a bearing portion 51 provided on the mounting base 5 and the spring material 6. The force with which the material 6 presses and presses the shaft portion 41 is adjusted. In other words, the arm 4 includes a shaft portion 41 that can rotate with respect to the mounting base 5, and the shaft portion 41 is sandwiched and held between the bearing portion 51 provided on the mounting base 5 and the spring material 6. The spring force adjusting portion for adjusting the force of the spring material 6 is configured.

  The mounting base 5 is capable of rotatably mounting the arm 4 to the lamp body 2. The mounting base 5 only has to have a bearing portion 51 of the mounting base 5 having an inner diameter substantially equal to the outer diameter of the shaft portion 41, and the shaft portion 41 is not necessarily pressed by the bearing groove 51 a and the spring material 6. It is not limited only to things. The lighting fixture 10 of the present embodiment holds the shaft portion 41 sandwiched between the bearing portion 51 of the mounting base 5 and the spring material 6 by the second screw. The mounting portion 5 includes a protrusion 51b that restricts the rotation of the arm 4 around the shaft portion 41 of the shaft portion 41 of the arm 4 within a predetermined angle range. In the luminaire 10, the spring material 6 is screwed into the mount 5, so that the spring material 6 is plastically deformed to generate a large frictional force. Therefore, the lighting fixture 10 can create a larger frictional force by the second screw to improve the rotation suppression force and hold the rotational position.

  In the lighting fixture 10, a frictional force is generated between the shaft portion 41 and the spring material 6 in addition to the frictional force generated between the shaft portion 41 and the bearing portion 51 in accordance with the screwing of the second screw. Thereby, since a large frictional force is created in the lighting fixture 10, even if the weight of the lamp main body 2 is heavy and the center of gravity of the lamp main body 2 is away from the rotation center of the shaft portion 41, The rotational position can be fixed relatively easily.

  The lighting device 10 of the present embodiment is configured to plastically deform the spring material 6 by screwing the second screw into the curved portions of the pair of extending portions 62 that extend from both ends of the base portion 61 of the spring material 6. Each of the pair of shaft portions 41 and 41 projecting from the arm 4 is pressed against each other. Therefore, the lighting fixture 10 can suppress the rotation of the shaft portion 41 around the shaft portion 41 with a relatively simple configuration, and can hold the rotation position.

  The mounting base 5 is formed in an outer shape slightly smaller than the recess 23 so that it can be accommodated in the recess 23 of the lamp body 2. The mount 5 includes a bearing portion 51 in which a bearing groove 51a in which the shaft portion 41 of the arm 4 is supported is formed. The mount 5 is preferably provided with a female screw portion in order to fix the tip portion 622 of the spring material 6 to the back surface 512 side of the mount 5. The mounting base 5 couples the lamp main body 2 and the mounting base 5 by fitting and fixing the mounting base 5 in a recess 23 provided on the side surface side in the heat radiation part 22 of the lamp main body 2.

  The spring material 6 can press-contact the shaft portion 41 of the arm 4 and the mounting base 5. As the spring material 6, a metal material such as stainless steel can be suitably used as the material of the spring material 6. Since the spring member 6 is configured to be able to be screwed to the female screw portion of the mounting base 5 by the first screw, an insertion hole 62a is suitably provided in the distal end portion 622 of the spring member 6. The spring material 6 can adjust the force of pressing against the shaft portion 41 by plastic deformation of the spring material 6 toward the mounting base 5 due to the engagement of the second screw.

DESCRIPTION OF SYMBOLS 1 LED light source part 2 Lamp main body 3 Power supply device 4 Arm 5 Mounting base 6 Spring material 7 Power supply cord 10 Lighting fixture 21 Storage part 22 Heat radiation part 23 Depression 41 Shaft part 42 Power supply code storage part 51 Bearing part 511 Outer surface 211 Outer surface 411 Outer surface

Claims (4)

A lamp body having a housing section for housing the LED light source section and a heat radiating section for radiating heat from the LED light source section, a power supply device for supplying power to the LED light source section and lighting the LED light source section, and the lamp body And an arm that connects the power supply device and the lighting device,
The lamp body includes a mounting base in a recess of the lamp body, and the arm is rotatable with respect to the mounting base and can be stored in the mounting base.   The mounting base is formed so that an outer surface of the mounting base is flush with an outer surface of the lamp main body in a state where the mounting base is housed in the recess of the lamp main body, and the arm is mounted on the mounting base. The lighting fixture according to claim 1, wherein an outer surface of the arm forms a surface flush with an outer surface of the mount in a state where the arm is stored.   The lighting device according to claim 1, wherein the arm includes a power cord storage unit that can store a power cord that supplies power to the LED light source unit from the power supply device.   The arm has a pair of shaft portions that can rotate with respect to the mounting base, and the shaft portions are sandwiched and held between a bearing portion provided on the mounting base and a spring material, and the spring material The lighting apparatus according to claim 1, wherein a force for pressing the shaft portion is adjusted.

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