JP2017188391A - Light source unit and lighting device including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source unit which enables further improvement of electric reliability, and to provide a lighting device including the light source unit.SOLUTION: A light source unit 10 includes: a light source part 1; an attachment member 4 formed by a metallic material and in which the light source part 1 is attached to a first surface 4aa; an electric power unit 3 which is attached to a second surface 4ab of the attachment member 4 which is opposite to the first surface 4aa and supplies electric power to the light source part 1; and a ground fixing bracket 6 attached to the second surface 4ab and electrically connected with the attachment member 4. The ground fixing bracket 6 has: a fixing part 6a fixed to the attachment member 4; and a flat plate part 6b held by the fixing part 6a. The flat plate part 6b is disposed facing the second surface 4ab of the attachment member 4 and forming a predetermined space therebetween and is electrically connected with a ground line 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a light source unit and a lighting fixture including the same, and more particularly to a light source unit including a power supply device and a lighting fixture including the same.

  Conventionally, a luminaire is sometimes grounded to prevent damage due to overvoltage or to prevent electric leakage.

  As this type of lighting fixture, a structure including a main body, a unit portion attached to the main body, and a lamp supported by the main body is known (for example, Patent Document 1). The unit portion includes a pedestal on which a terminal block and a ballast are mounted. A socket is attached to the lamp.

  In the lighting fixture of patent document 1, earthing | grounding is ensured and earth | grounded by screwing the base of a unit part to a main body.

  As another lighting apparatus, a structure including a tubular lamp and an apparatus main body is known (for example, Patent Document 2). The tubular lamp has a lamp body in which a light emitting element is arranged. The lamp body has a metal heat dissipating part. The instrument body is provided with a terminal block. The lamp body is attached to the terminal block.

  In the lighting fixture of Patent Document 2, the tubular lamp includes a power feeding unit that feeds power to the light emitting element, and a grounding unit. The grounding unit has a grounding wire and a connector. The grounding unit has a connector attached to the tip of the grounding wire. As for the grounding part, the base end part is being fixed to the attachment base of the thermal radiation part with the screw. The grounding portion grounds the heat radiating portion of the lamp body to the ground terminal of the terminal block provided on the fixture body.

JP 2009-123686 A International Publication No. 2011/122518

  By the way, in the light source unit and the lighting fixture provided with the light source unit, a structure having higher electrical reliability is required. Is required.

  An object of the present invention is to provide a light source unit with higher electrical reliability and a luminaire including the same.

  A light source unit according to an embodiment of the present invention includes a light source unit, a mounting member, a power supply device, and a ground mounting bracket. The attachment member is made of a metal material. As for the said attachment member, the said light source part is attached to the 1st surface. The power supply device is attached to a second surface opposite to the first surface of the attachment member. The power supply device supplies power to the light source unit. The ground mounting bracket is attached to the second surface. The ground mounting bracket is electrically connected to the mounting member. The ground mounting bracket has a fixed portion and a flat plate portion. The fixing portion is fixed to the mounting member. The flat plate portion is held by the fixed portion. The flat plate portion is disposed to face the second surface of the mounting member with a predetermined gap. The flat plate portion is electrically connected to a ground line.

  The lighting fixture of one Embodiment which concerns on this invention is equipped with the said light source unit and the fixture main body. The instrument body holds the light source unit.

  The light source unit of the present invention and the lighting fixture provided with the light source unit can have a more electrically reliable configuration.

FIG. 1 is a partially broken cross-sectional view showing a light source unit and a lighting fixture according to an embodiment of the present invention. FIG. 2 is a perspective view of the light source unit on the back side partly broken away showing the same. FIG. 3 is an exploded perspective view of the front side showing the lighting apparatus according to the above. FIG. 4 is a front perspective view showing the lighting apparatus according to the above. FIG. 5 is a circuit diagram showing the above-described light source unit.

  Below, the light source unit 10 and the lighting fixture 30 of this embodiment are demonstrated with reference to FIG. 1 thru | or FIG. In the figure, the same reference numerals are assigned to the same members, and duplicate descriptions are omitted. The size and positional relationship of the members shown in each drawing may be exaggerated for clarity of explanation. In the following description, each element included in the present embodiment may be configured such that a plurality of elements are configured by one member and the plurality of elements are shared by one member. You may implement | achieve by sharing with a member.

  The light source unit 10 of this embodiment is provided with the light source part 1, the attachment member 4, the power supply device 3, and the earth attachment metal fitting 6, as shown in FIG. The attachment member 4 is made of a metal material. As for the attachment member 4, the light source part 1 is attached to 1st surface 4aa. The power supply device 3 is attached to the second surface 4ab opposite to the first surface 4aa of the attachment member 4. The power supply device 3 supplies power to the light source unit 1. The earth mounting bracket 6 is attached to the second surface 4ab. The earth mounting bracket 6 is electrically connected to the mounting member 4. The earth mounting bracket 6 has a fixed portion 6a and a flat plate portion 6b. The fixing portion 6 a is fixed to the attachment member 4. The flat plate portion 6b is held by the fixed portion 6a. The flat plate portion 6b is disposed to face the second surface 4ab of the mounting member 4 with a predetermined gap. The flat plate portion 6b is electrically connected to the ground line 8 shown in FIG.

  In the light source unit 10 of the present embodiment, the flat plate portion 6b of the ground mounting bracket 6 is disposed to face the second surface 4ab of the mounting member 4 with a predetermined gap, and is electrically connected to the ground wire 8. Therefore, the electrical reliability can be increased.

  Below, each structure of the light source unit 10 of this embodiment is demonstrated in detail. As shown in FIGS. 1 and 3, the light source unit 10 of the present embodiment is housed in the recess 31aa of the fixture body 31 and constitutes a part of the lighting fixture 30. As shown in FIG. 1, the light source unit 10 includes a cover member 5, a hooking spring 7 a, and a hooking piece 7 b in addition to the light source unit 1, the power supply device 3, the mounting member 4, and the ground mounting bracket 6. Yes.

  The light source unit 1 includes a light emitting element 1a and a mounting substrate 1b on which the light emitting element 1a is mounted. The light emitting element 1a is an LED (Light Emitting Diode). The light emitting element 1a is electrically connected to a conductor provided on the mounting substrate 1b by solder.

  The LED includes, for example, an LED chip, a package provided with a recess for housing the LED chip, and a light-transmitting sealing material that seals the recess. Examples of the LED chip include a blue LED chip capable of emitting blue light. The sealing material is formed of a translucent material. Examples of the translucent material of the sealing material include a silicone resin or an epoxy resin. A phosphor is mixed in the light-transmitting material of the sealing material. Examples of the phosphor include a yellow phosphor that is excited by blue light emitted from a blue LED chip and emits yellow light. The LED emits mixed light of blue light emitted from the blue LED chip and yellow light emitted from the yellow phosphor. The LED emits, for example, day white light as mixed color light. In the LED, the phosphor may not be mixed with the light-transmitting material of the sealing material. The LED may be, for example, a surface-mounted light emitting diode including an LED chip, a package, and a sealing material, or may be a single LED chip. The light source part 1 is not restricted only to the structure which utilizes LED for the light emitting element 1a. The light emitting element 1a may be, for example, an organic electroluminescence element.

  As shown in FIG. 3, the mounting substrate 1b has a long rectangular flat plate-like outer shape. The mounting substrate 1b has a conductor that is electrically connected to the light emitting element 1a. The conductor electrically connects the plurality of light emitting elements 1a in series. The plurality of light emitting elements 1a are linearly arranged along the longitudinal direction of the mounting substrate 1b at the center in the short direction of the mounting substrate 1b. Each of the plurality of light emitting elements 1a is electrically connected to a conductor by solder. Examples of the mounting substrate 1b include a glass epoxy resin substrate. The mounting substrate 1b is not limited to a glass epoxy resin substrate, and may be, for example, a ceramic substrate or a metal base printed wiring board. The mounting substrate 1b is mounted with a connector 1c at the end in the longitudinal direction. The connector 1c is electrically connected to a conductor so that power can be supplied to the light emitting element 1a. The mounting substrate 1b is electrically connected to the power supply device 3 through the electric wire connected to the connector 1c.

  As shown in FIGS. 1 and 2, the power supply device 3 is attached to a second surface 4ab opposite to the first surface 4aa to which the mounting substrate 1b of the attachment member 4 is attached. The power supply device 3 supplies predetermined lighting power to the mounting substrate 1b to light the light emitting element 1a. As shown in FIG. 3, the power supply device 3 includes a power supply board 3a, an electrical component 3b, and a housing 3c. The power supply substrate 3a is a glass epoxy resin substrate. The power supply substrate 3a is not limited to a glass epoxy resin substrate, and may be a ceramic substrate or a metal base printed wiring board, for example. A plurality of types of electrical components 3b are mounted on the power supply board 3a.

  The plurality of types of electrical components 3 b constitute various circuits in the power supply device 3. Examples of the multiple types of electrical components 3b include a transformer, a diode, a capacitor, a switching element, and a drive IC (Integrated Circuit) that controls switching of the switching element. The plurality of types of electrical components 3b are appropriately electrically connected to form a power supply circuit for generating lighting power for the light emitting element 1a. The power supply circuit includes, for example, a step-up chopper circuit and a step-down chopper circuit.

  The housing 3c accommodates the power supply board 3a and a plurality of types of electrical components 3b. The housing 3c has a long rectangular box-like outer shape with an opening formed on one surface. The housing 3 c is arranged so that the opening is closed by the mounting member 4. The housing 3c is attached to the attachment member 4 by an attachment screw, for example. The housing 3c is made of a metal plate material. The housing 3c is formed by punching and bending a metal plate material.

  The attachment member 4 has a long outer shape as shown in FIGS. 2 and 3. As shown in FIG. 1, the attachment member 4 is formed in a C shape in a cross-sectional view orthogonal to the longitudinal direction, with an attachment portion 4 a and a pair of side plate portions 4 b. The attachment portion 4a is formed in a long rectangular shape when viewed from the front. The side plate portion 4b is provided so as to extend in the thickness direction of the attachment portion 4a from both ends in the short direction of the attachment portion 4a along the longitudinal direction of the attachment portion 4a. A protruding portion 4e that protrudes outward is provided at the tip of the side plate portion 4b. The attachment member 4 is provided with a protruding portion 4e along the longitudinal direction.

  The protrusion 4e is formed in a cylindrical shape by winding the tip of the side plate 4b. The attachment portion 4a is provided with a recess 4ad at the center in the short direction along the longitudinal direction. The recess 4ad includes a bottom portion 4cb and a pair of side portions 4cc. The bottom 4cb is formed in a long rectangular shape when viewed from the front. The side portion 4cc rises from both ends in the short direction of the bottom portion 4cb along the longitudinal direction of the bottom portion 4cb. The distance between the pair of side portions 4cc increases as the distance from the bottom portion 4cb increases. As shown in FIG. 1, the mounting member 4 has a groove 4 ae formed in a region sandwiched between the bottom portion 4 cb and the side plate portion 4 b on the second surface 4 ab side.

  In the mounting member 4, the mounting substrate 1b is disposed at a predetermined position of the bottom 4cb on the first surface 4aa side. The mounting substrate 1b is attached to the bottom 4cb of the attachment member 4. The surface of the side portion 4cc constitutes a reflection surface that reflects light from the light emitting element 1a. As shown in FIG. 3, the mounting member 4 has a locking piece 4 s that protrudes from the bottom 4 cb. The locking piece 4s is inserted into a hole 1bc that penetrates in the thickness direction of the mounting substrate 1b. The mounting member 4 fixes the mounting substrate 1b between the locking piece 4s and the bottom portion 4cb by bending the locking piece 4s.

  The attachment member 4 is formed of, for example, a steel plate. The material of the attachment member 4 is not limited to a steel plate, and may be a metal material such as aluminum, copper, or stainless steel. In the light source unit 10, the mounting member 4 can be used as a heat radiating plate by arranging the mounting substrate 1 b in contact with the mounting member 4 made of a metal material. When the attachment member 4 is formed of a steel plate having a higher thermal conductivity than the resin, the heat generated in the light emitting element 1a can be efficiently radiated to the outside. The attachment member 4 is formed by punching and bending a steel plate.

  The cover member 5 has a long outer shape. As shown in FIGS. 1 to 4, the cover member 5 includes a cover body 5 a and a cover end 5 b. The cover member 5 covers the mounting substrate 1b on which the light emitting element 1a is mounted, so that a space 10aa is formed between the cover member 5 and the mounting member 4 as shown in FIG.

  The cover body 5a has a light emitting part 5c and a protruding plate part 5d. The light emitting part 5c has a semi-cylindrical outer shape. The light emission part 5c may be formed so that the surface may have a smooth curved surface, or the surface may be formed in unevenness. The light emitting portion 5c can be used for condensing or diverging light from the light emitting element 1a due to the unevenness of the surface. In other words, the light emitting unit 5c may have a lens function.

  The projecting plate portions 5d are provided at both ends of the light emitting portion 5c in the short direction along the longitudinal direction of the light emitting portion 5c. The pair of protruding plate portions 5d are formed so as to protrude in parallel with each other from both ends of the light emitting portion 5c. At the tip of each of the pair of protruding plate portions 5d, a protruding portion 5e that protrudes toward each other is provided.

  The protrusion 5 e is hooked on the protrusion 4 e of the attachment member 4. As shown in FIG. 1, each of the pair of protruding plate portions 5d includes an inner protruding portion 5f between the protruding portion 5e and the light emitting portion 5c. Each of the pair of inner protrusions 5f is arranged in a direction in which the tips approach each other. The light emitting portion 5c is provided with extending portions 5h at both ends in the short direction along the longitudinal direction. The extending part 5h protrudes so as to extend to the outside of the protruding plate part 5d so as to be continuous with the light emitting part 5c. The cover main body 5a is integrally formed with a light emitting portion 5c, a protruding plate portion 5d, a protruding portion 5e, an extending portion 5h, and an inner protruding portion 5f.

  The cover end 5b is provided at an end portion in the longitudinal direction of the cover body 5a. The cover end 5b is formed in a semicircular outer shape. The cover end 5b includes a clamping part 5g. The sandwiching portion 5g can sandwich and hold the inner protrusion 5f of the cover body 5a. The cover end 5b is attached to the cover main body 5a by the holding portion 5g holding the inner protrusion 5f.

  The cover member 5 preferably has a configuration capable of efficiently transmitting the light emitted from the light emitting element 1a. Examples of the material of the cover member 5 include a translucent resin material such as polycarbonate resin or acrylic resin. The cover member 5 is formed by, for example, extrusion molding. The cover member 5 may contain a light diffusing material in a translucent resin material.

  The earth mounting bracket 6 has a first reinforcing wall 6d and a second reinforcing wall 6f in addition to the fixed portion 6a and the flat plate portion 6b. As shown in FIGS. 1 to 3, the ground mounting bracket 6 has a box-shaped outer shape with a fixing portion 6 a, a flat plate portion 6 b, a first reinforcing wall 6 d, and a second reinforcing wall 6 f. As shown in FIGS. 2 and 3, the flat plate portion 6 b has a long rectangular flat plate-like outer shape. In FIG. 2, the longitudinal direction of the flat plate portion 6b is illustrated by a double arrow X, and the short direction of the flat plate portion 6b is illustrated by a double arrow Y.

  The fixing part 6a has a first fixing part 6aa and a second fixing part 6ab. As shown in FIGS. 1 and 2, the first fixing portion 6aa has a first peripheral wall 6c, a first base piece 6g, and a protruding piece 6j. The first peripheral wall 6c has a long rectangular flat plate-like outer shape. In the first peripheral wall 6c, a first base piece 6g is disposed at one end edge in the short direction along the longitudinal direction. The first base piece 6g has a rectangular flat plate-like outer shape. The first base piece 6g protrudes outward along a direction orthogonal to the first peripheral wall 6c. The first base piece 6g has a protruding piece 6j disposed at the other end edge opposite to the first peripheral wall 6c in the short direction along the longitudinal direction.

  The protruding piece 6j has a rectangular flat plate-like outer shape. The protruding piece 6j protrudes from the first base piece 6g along the thickness direction of the first base piece 6g. The protruding piece 6j is disposed so as to face the first peripheral wall 6c. In other words, the first fixing portion 6aa has a C-shaped outer shape in a cross section in which the first peripheral wall 6c, the first base piece 6g, and the protruding piece 6j are orthogonal to the double arrow Y.

  The second fixing portion 6ab has a second peripheral wall 6e and a second base piece 6h. The second peripheral wall 6e has a long rectangular flat plate-like outer shape. The second peripheral wall 6e is provided with a second base piece 6h at one end edge in the short direction along the longitudinal direction. The second base piece 6h has an outer shape of a rectangular flat plate shape. The second base piece 6h protrudes outward along a direction orthogonal to the second peripheral wall 6e. The second fixing portion 6ab has an L-shaped outer shape in a cross section in which the second peripheral wall 6e and the second base piece 6h are orthogonal to the double arrow X. The first peripheral wall 6c of the first fixing portion 6aa and the second peripheral wall 6e of the second fixing portion 6ab are arranged in an orthogonal direction.

  The flat plate portion 6b is provided with an insertion hole 6ba on one edge side in the longitudinal direction at the central portion in the short direction. The insertion hole 6ba penetrates in the thickness direction of the flat plate portion 6b. As for the flat plate part 6b, the 1st surrounding wall 6c of 1st fixing | fixed part 6aa is arrange | positioned along the transversal direction in one edge of a longitudinal direction. As for the flat plate part 6b, the 1st surrounding wall 6c protrudes along the thickness direction. In the flat plate portion 6b, the second peripheral wall 6e of the second fixing portion 6ab is arranged along the longitudinal direction at one edge in the short direction. The 2nd surrounding wall 6e is provided in the other edge side opposite to one edge of the longitudinal direction in the flat plate part 6b. As for the flat plate part 6b, the 2nd surrounding wall 6e protrudes along the thickness direction.

  As for the flat plate part 6b, the 1st reinforcement wall 6d is arrange | positioned along a transversal direction in the other edge of a longitudinal direction. The first reinforcing wall 6d has a long rectangular flat plate-like outer shape. The first reinforcing wall 6d protrudes from the flat plate portion 6b along the thickness direction of the flat plate portion 6b. The first reinforcing wall 6d is disposed so as to face the first peripheral wall 6c. The longitudinal length of the first reinforcing wall 6d is shorter than the longitudinal length of the first peripheral wall 6c. The length of the first reinforcing wall 6d in the short direction is substantially equal to the length of the first peripheral wall 6c in the short direction. The first reinforcing wall 6d can increase the mechanical strength of the ground mounting bracket 6.

  In the flat plate portion 6b, the second reinforcing wall 6f is arranged along the longitudinal direction at the other edge opposite to the one edge in the short direction where the second peripheral wall 6e is arranged. The second reinforcing wall 6f has a long rectangular flat plate-like outer shape. In the second reinforcing wall 6f, the length in the longitudinal direction of the flat plate portion 6b is longer than the length in the longitudinal direction of the second peripheral wall 6e. The length of the second reinforcing wall 6f in the short direction is shorter than the length of the first peripheral wall 6c and the second peripheral wall 6e in the short direction. The second reinforcing wall 6f protrudes from the flat plate portion 6b along the thickness direction of the flat plate portion 6b. The second reinforcing wall 6f is disposed so as to face the second peripheral wall 6e. The second reinforcing wall 6f can increase the mechanical strength of the ground mounting bracket 6.

  As for the earth attachment metal fitting 6, the fixed part 6a and the flat plate part 6b are integrally formed with the metal material. The earth mounting bracket 6 is formed by punching and bending a metal material. An example of the metal material of the ground mounting bracket 6 is a steel plate. The metal material of the earth mounting bracket 6 is not limited to a steel plate, and may be aluminum, copper, stainless steel, or the like.

  The ground attachment fitting 6 accommodates the first base piece 6g in a groove 4ae provided on one side of the attachment member 4 in the short direction along the longitudinal direction of the attachment member 4. As shown in FIGS. 1 and 2, the first base piece 6g is formed slightly smaller than the groove 4ae so that the first base piece 6g is accommodated in the groove 4ae and can be positioned. In the ground mounting bracket 6, the first base piece 6g and the mounting portion 4a are fixed by caulking in a state where the first base piece 6g is accommodated in the groove 4ae. In other words, the first base piece 6g constitutes a caulking piece that is caulked to the mounting member 4. That is, the first base piece 6g is a caulking piece. The first base piece 6g and the attachment portion 4a are electrically connected by caulking.

  The protruding piece 6j is arranged along the side plate portion 4b in a state where the first base piece 6g is accommodated in the groove 4ae of the mounting member 4. The protruding piece 6j can be fixed to the side plate portion 4b with a screw or the like. The protruding piece 6j is coupled to the side plate portion 4b in a state where the first base piece 6g is accommodated in the groove 4ae of the mounting member 4. In the light source unit 10, the mechanical fixing strength between the mounting member 4 and the ground mounting bracket 6 can be further increased by coupling the protruding piece 6 j and the side plate portion 4 b of the mounting member 4. In the light source unit 10, electrical connection between the mounting member 4 and the earth mounting bracket 6 may be performed by coupling the protruding piece 6 j and the side plate portion 4 b of the mounting member 4. The protruding piece 6j does not necessarily have to be coupled to the side plate portion 4b.

  In other words, in the light source unit 10 of the present embodiment, the attachment member 4 includes a plate-like attachment portion 4a having a first surface 4aa and a second surface 4ab, and a side plate extending from the second surface 4ab in the thickness direction of the attachment portion 4a. Part 4b. It is preferable that the fixing | fixed part 6a has the protrusion piece 6j couple | bonded with the side-plate part 4b.

  In the light source unit 10 of the present embodiment, the fixing portion 6a includes the protruding piece 6j coupled to the side plate portion 4b, so that electrical connection and mechanical connection can be further enhanced.

  In the ground mounting bracket 6, the second base piece 6 h is accommodated in a groove 4 ae provided on the other side of the mounting member 4 in the short direction along the longitudinal direction of the mounting member 4. The second base piece 6h is formed slightly smaller than the groove 4ae so that the second base piece 6h is accommodated in the groove 4ae and can be positioned. In the ground mounting bracket 6, the second base piece 6h and the mounting portion 4a are fixed by caulking in a state where the second base piece 6h is accommodated in the groove 4ae. In other words, the second base piece 6h constitutes a caulking piece that is caulked to the attachment member 4. That is, the second base piece 6h is a caulking piece. The second base piece 6h and the attachment portion 4a are electrically connected by caulking.

  The ground mounting bracket 6 is mechanically and electrically connected to the ground mounting bracket 6 and the mounting member 4 by fixing the fixing portion 6a and the mounting member 4 by caulking.

  That is, in the light source unit 10 of this embodiment, it is preferable that the fixing | fixed part 6a has the attachment member 4 and the crimping piece crimped.

  In the light source unit 10 of the present embodiment, the fixing portion 6a includes the mounting member 4 and the caulking piece to be caulked, so that the mechanical structure of the mounting member 4 and the ground mounting bracket 6 is relatively simple. It is possible to improve the fixing strength and to make electrical connection.

  The electrical connection between the ground mounting bracket 6 and the mounting member 4 is not limited to the configuration performed by caulking. The mechanical and electrical connection between the ground mounting bracket 6 and the mounting member 4 may be performed by screwing.

  As shown in FIGS. 1 and 2, the grounding fitting 6 is screwed into the insertion hole 6ba via a spring washer. As the screw 9, for example, a tapping screw can be used. The screw 9 is not limited to a tapping screw, and may be a bolt and a nut. In the ground mounting bracket 6, the gap between the flat plate portion 6 b and the second surface 4 ab of the mounting member 4 is appropriately set so that the screw 9 does not hit the mounting member 4 even if the screw 9 is screwed into the insertion hole 6 ba. . The grounding fitting 6 is screwed to the flat hole 6b by screwing the screw 9 into the insertion hole 6ba. The grounding wire 8 is provided with a crimp terminal 8a whose tip is formed in an annular shape. An example of the grounding wire 8 is a flexible cable. The ground wire 8 and the attachment member 4 are electrically connected via the ground attachment fitting 6 by screwing the crimp terminal 8a of the ground wire 8 to the flat plate portion 6b. The ground mounting bracket 6 is not limited to a configuration in which the crimp terminal 8a of the ground wire 8 is screwed to the flat plate portion 6b and the ground wire 8 and the ground mounting bracket 6 are electrically connected. When the tip of the grounding wire 8 is a flat metal piece, the earth mounting bracket 6 may have a structure having a holding portion that allows the metal piece to be inserted and held.

  As shown in FIG. 1, the hook spring 7 a is attached to the second surface 4 ab of the attachment member 4. The hook spring 7 a is provided at both ends in the longitudinal direction of the mounting member 4 on one side of the both ends in the short direction of the mounting member 4. The hook spring 7a is hooked on the corresponding hook metal fitting of the instrument body 31.

  As shown in FIG. 1, the hooking piece 7 b is attached to the second surface 4 ab of the attachment member 4. As shown in FIG. 3, the hooking piece 7 b is provided at both ends in the longitudinal direction of the mounting member 4 on the other side opposite to one side of both ends in the short direction of the mounting member 4. The hooking piece 7b is inserted into the corresponding hooking hole 31k of the instrument main body 31, and is hooked on the peripheral part of the hooking hole 31k.

  Below, the circuit structure of the light source unit 10 is demonstrated based on FIG. In FIG. 5, the attachment member 4 to which the light source part 1 and the power supply device 3 are attached is illustrated with the dashed-dotted line. The attachment member 4 is shown to be grounded in FIG.

  The power supply device 3 includes an input connector 3d, a filter circuit 3e, a rectifier 3f, a booster circuit 3g, a step-down circuit 3h, and an output connector 3i. The power supply device 3 includes a main control circuit 3j, a control power supply circuit 3k, a dimming control circuit 3m, a turn-off control circuit 3n, and a signal input unit 3p.

  The input connector 3d is electrically connected to an external power source 40 such as a commercial AC power source. The filter circuit 3e includes a common mode choke coil 3e1 and an across-the-line capacitor 3e2. An example of the rectifier 3f is a diode bridge circuit. As for the rectifier 3f, the external power supply 40 and the alternating current input terminal are electrically connected through the filter circuit 3e and the input connector 3d. The rectifier 3f can perform full-wave rectification of the AC voltage / AC current supplied from the external power supply 40 and output it from the DC output terminal.

  The booster circuit 3g includes a choke coil L1, a first switch element Q1, a first rectifier element D1, and a first smoothing capacitor C1. In the booster circuit 3g, the choke coil L1, the first switch element Q1, the first rectifier element D1, and the first smoothing capacitor C1 constitute a boost chopper circuit. The step-up chopper circuit is a power factor correction circuit. The booster circuit 3g boosts the pulsating voltage output from the rectifier 3f.

  The step-down circuit 3h includes a second switch element Q2, an inductor L2, a second rectifier element D2, a first resistor R1, and a second smoothing capacitor C2. The step-down circuit 3h constitutes a step-down chopper circuit with the second switch element Q2, the inductor L2, the second rectifier element D2, the first resistor R1, and the second smoothing capacitor C2. The step-down chopper circuit is a buck converter. The step-down circuit 3h steps down the DC voltage output from the step-up circuit 3g. The output connector 3i is electrically connected to the output terminal of the step-down circuit 3h. An example of the output connector 3i is a receptacle connector.

  The main control circuit 3j switches the first switch element Q1 and maintains the output voltage of the booster circuit 3g constant. The main control circuit 3j switches the second switch element Q2 to make the output current of the step-down circuit 3h coincide with a predetermined target value. The control power supply circuit 3k generates operating power for the main control circuit 3j from the output voltage of the booster circuit 3g.

  In the power supply device 3, the control signal from the signal input unit 3p is input to the dimming control circuit 3m and the turn-off control circuit 3n. The turn-off control circuit 3n generates a turn-off signal for turning off the light source unit 1 according to the control signal, and outputs it to the main control circuit 3j. When receiving the turn-off signal, the main control circuit 3j stops the switching of the second switch element Q2, stops the step-down circuit 3h, and turns off the light source unit 1.

  The dimming control circuit 3m generates a dimming signal instructing the dimming level of the light source unit 1 according to the control signal and outputs the dimming signal to the main control circuit 3j. The main control circuit 3j adjusts the on-duty ratio of the second switch element Q2 in accordance with the dimming signal received from the dimming control circuit 3m. The dimming control circuit 3m detects the output current of the step-down circuit 3h from the voltage across the first resistor R1, and generates a dimming signal so that the average value of the output current matches the target value corresponding to the dimming level To do.

  Hereinafter, the fact that the structure of the light source unit 10 according to the present embodiment can achieve higher electrical reliability will be described based on the light source unit 10 according to the present embodiment and the light source unit according to the comparative example. The light source unit of the comparative example has the same structure as that of the light source unit 10 of the present embodiment, except that it does not include a ground mounting bracket. In the light source unit of the comparative example, it is conceivable to prevent leakage by electrically grounding the power supply device attached to the attachment member using a power supply line derived from the power supply device. The light source unit of the comparative example satisfies the standards of the Electrical Appliance and Material Safety Law concerning the protective grounding of lighting equipment when the power supply device attached to the mounting member is electrically grounded using the power supply line derived from the power supply device. It is configured.

  By the way, in lighting fixtures, the standards for the Electrical Appliance and Material Safety Law and JIS (Japanese Industrial Standards) / IEC (International Electrotechnical Commission) may be different. The light source unit of the comparative example is, for example, IEC60598-1 7.2.11 related to protective grounding of a lighting fixture only by electrically grounding the power supply device attached to the mounting member using a power supply line derived from the power supply device. And IEC61347-19 standard may not be satisfied.

  In the light source unit of the comparative example, in order to satisfy the standards of IEC60598-1 7.2.11 and IEC61347-19 regarding the protective grounding of the lighting fixture, it is conceivable that the grounding wire is directly screwed to the mounting member with a screw.

  However, in the light source unit of the comparative example, when the ground wire is directly screwed to the mounting member with a screw, there is a possibility that chips of the mounting member may enter the mounting substrate side on which the light emitting element is mounted. In the light source unit of the comparative example, if the chips of the mounting member enter the mounting substrate side on which the light emitting element is mounted, the electrical reliability may be reduced by adhering to the conductor of the mounting substrate. In the light source unit of the comparative example, when the ground wire is directly screwed to the mounting member with a screw, the screw may protrude from the surface of the mounting substrate on which the light emitting element is mounted. In the light source unit of the comparative example, when the grounding wire is directly screwed to the mounting member with a screw, if the screw protrudes from the surface of the mounting substrate on which the light emitting element is mounted, the light from the light emitting element is shadowed with the screw. There is also a possibility that the characteristics are deteriorated.

  In the light source unit 10 of the present embodiment, the grounding wire 8 is electrically connected to the mounting member 4 via the ground mounting bracket 6, so that the mounting member 4 can be grounded separately from the power supply device 3. In the light source unit 10 of the present embodiment, the mounting member 4 can be grounded separately from the power supply device 3, so that the JIS and IEC standards relating to protective grounding of the lighting fixture can be satisfied.

  In the light source unit 10 of the present embodiment, the flat plate portion 6b of the ground mounting bracket 6 has a predetermined gap facing the second surface 4ab of the mounting member 4, so that even when the ground wire 8 is connected, comparison is made. It can be electrically connected easily. In the light source unit 10 of the present embodiment, since there is a predetermined gap between the flat plate portion 6b and the second surface 4ab, even when the ground wire 8 is connected, the influence of the chips of the screw 9 is suppressed and more electric power is supplied. Reliability can be increased.

  In the light source unit 10 of the present embodiment, the flat plate portion 6b of the earth mounting bracket 6 has a predetermined gap facing the second surface 4ab of the mounting member 4, and is electrically connected to the fixture body 31 and the ground wire 8. Therefore, it is possible to prevent the screw 9 from projecting to the surface side of the mounting substrate 1b. In the light source unit 10, it is possible to prevent the screws 9 from projecting to the surface side of the mounting substrate 1 b, so that it is possible to suppress a decrease in optical characteristics and increase the degree of design freedom.

  Below, the assembly process of the light source unit 10 is demonstrated.

  In the assembly process of the light source unit 10, the light emitting element 1a is mounted on the mounting substrate 1b, and the light source unit 1 is prepared in advance. In the assembly process, the ground mounting bracket 6 is attached to the second surface 4ab of the mounting member 4 in advance. The earth mounting bracket 6 is fixed in advance to the mounting member 4 by caulking. The ground mounting bracket 6 includes a first base piece 6g accommodated in one groove 4ae of the two grooves 4ae of the attachment member 4, and a second base piece 6h of the two grooves 4ae of the attachment member 4. It is accommodated in the other groove 4ae. The ground mounting bracket 6 has a thickness of the first base piece 6g and the bottom portion 4cb using the metal plate plasticity by punching from the thickness direction after the first base piece 6g and the bottom portion 4cb of the mounting member 4 are overlapped. By performing plastic deformation in the direction orthogonal to the direction and the thickness direction, the caulking is joined.

  The ground mounting bracket 6 is caulked and joined so that the first base piece 6g and the bottom portion 4cb of the mounting member 4 are overlapped, and the punch protrudes from the first surface 4aa side of the bottom portion 4cb to the second surface 4ab. The In the ground mounting bracket 6, the second base piece 6 h and the mounting portion 4 a of the mounting member 4 are caulked and joined in the same manner as the caulking joint between the first base piece 6 g and the mounting member 4. The ground mounting bracket 6 and the mounting member 4 are electrically and mechanically connected by caulking and joining the first base piece 6g and the bottom portion 4cb and the second base piece 6h and the bottom portion 4cb. .

  In the assembly process, the mounting substrate 1b is disposed on the first surface 4aa of the mounting member 4, and the locking piece 4s of the mounting member 4 inserted into the hole 1bc of the mounting substrate 1b is bent to process the light source unit 1. Is attached to the attachment portion 4 a of the attachment member 4. In the assembly process, the power supply device 3 is attached to the second surface 4ab of the attachment member 4. In the assembly process, the power supply device 3 is fixed to the attachment member 4 by caulking.

  Next, in the assembly process, the cover member 5 is attached to the attachment member 4 so as to cover the mounting substrate 1b. In the assembly process, the protruding portion 5 e of the cover member 5 is fitted into the protruding portion 4 e of the mounting member 4. The cover member 5 is assembled to the attachment member 4 by the pair of protrusions 5e being hooked separately from the corresponding protrusions 4e. In the assembly process, the protruding portion 5 e of the cover member 5 is fitted into the protruding portion 4 e of the mounting member 4. In the assembly process, the cover member 5 and the attachment member 4 can be integrally fixed by screwing the protruding plate portion 5d of the cover member 5 and the side plate portion 4b of the attachment member 4 appropriately. In the assembly process, the light source unit 10 can be assembled by attaching the cover end 5b to both ends of the cover member 5 and the attachment member 4 in the longitudinal direction.

  Below, the fixture main body 31 of the lighting fixture 30 is demonstrated easily, referring FIG.1, FIG.3 and FIG.4. The lighting fixture 30 is directly attached to a ceiling material, for example. The instrument body 31 is attached to a ceiling material using a suspension bolt.

  The instrument body 31 has a long outer shape. The instrument body 31 is formed in a flat box shape. The instrument body 31 is formed of a metal plate. The instrument body 31 has a recess 31aa at the center. The recess 31aa has an outer shape in which one surface of the instrument body 31 is recessed in a rectangular shape. The recess 31aa is provided over the entire length of the instrument body 31 in the longitudinal direction.

  The instrument main body 31 has inclined portions 31b extending from the opening edge of the recess 31aa on both sides of the recess 31aa in the short direction. The inclined portion 31b is inclined so that the thickness of the instrument main body 31 becomes thinner as the distance from the recessed portion 31aa increases. The instrument body 31 includes an end cap 31e. The end caps 31e are provided at both ends of the instrument body 31 in the longitudinal direction. The end cap 31e has a trapezoidal shape when viewed from the front.

  As shown in FIG. 3, the recess 31aa is provided with hook holes 31k into which the hook pieces 7b of the light source unit 10 are inserted at both ends in the longitudinal direction. The instrument body 31 can be mounted with the light source unit 10 by accommodating a part of the light source unit 10 in the recess 31aa. The power supply device 3 and the earth mounting bracket 6 are accommodated in the recess 31aa. In the lighting fixture 30, the protruding plate portion 5 d of the cover member 5 is disposed between the side plate portion 4 b of the light source unit 10 and the concave portion 31 aa of the fixture main body 31 with the light source unit 10 attached to the fixture main body 31. The extension 5 h is provided so as to overlap the opening edge of the recess 31 aa of the instrument body 31 in a state where the light source unit 10 is attached to the instrument body 31.

  That is, the lighting fixture 30 includes the light source unit 10 and the fixture main body 31. The instrument body 31 holds the light source unit 10.

  An insertion hole 31 ca is provided in the bottom surface portion 31 a of the instrument main body 31. The bottom surface portion 31 a is provided with a plurality of insertion holes 31 ca along the longitudinal direction of the instrument body 31. A power supply power line is inserted into the insertion hole 31ca. The power supply line is electrically connected to the external power supply 40. A control line is inserted into the insertion hole 31ca. A dimming signal for controlling lighting of the light source unit 10 is transmitted to the control line. An earth conductor is inserted into the insertion hole 31ca. The ground conductor is grounded outside the lighting fixture 30. For example, an electric wire in which a core wire is covered with an insulating coating is used for each of the power supply line, the control line, and the ground conductor.

  The bottom surface portion 31a is provided with an insertion hole 31cb through which the suspension bolt is passed. Four insertion holes 31 cb are provided along the longitudinal direction of the instrument body 31. A suspension bolt provided on the back side of the ceiling material is inserted into the insertion hole 31cb. A nut is fastened to the suspension bolt inserted into the insertion hole 31cb. The bottom surface portion 31a is at one end of both ends in the lateral direction, and a hook metal fitting is attached to both ends in the longitudinal direction. The hook metal of the instrument body 31 is hooked by the hook spring 7a of the light source unit 10.

  A terminal block 36 is attached to the bottom surface portion 31a. The terminal block 36 supplies power from the external power supply 40 to the power supply device 3 through the connection line. The terminal block 36 connects the power supply line, the control line, and the ground conductor separately. The terminal block 36 includes a housing portion 36a, a terminal screw 36b, and a terminal plate 36c. As shown in FIGS. 1 and 3, the housing part 36a includes a rectangular tube part 36e, a connecting part 36f, and a cylindrical part 36g. The housing portion 36a has three rectangular tube portions 36e. The three rectangular tube portions 36e are connected side by side in the short direction by the connecting portion 36f so that the longitudinal direction is aligned. In each square tube portion 36e, two cylindrical portions 36g having an axial direction in a direction orthogonal to the longitudinal direction are disposed at both ends in the longitudinal direction. The inside of each of the two cylindrical portions 36g communicates with the inside of the corresponding square tube.

  The terminal screw 36b can move along the axial direction of the cylindrical portion 36g inside the cylindrical portion 36g. The terminal plate 36c is disposed in the cylinder of the rectangular tube portion 36e, and is disposed to face the terminal screw 36b. The terminal screw 36b is screwed into the cylindrical portion 36g. The terminal plate 36c is formed in a long rectangular plate shape, for example, along the inside of the rectangular tube portion 36e.

  The terminal block 36 has a power source core wire sandwiched between the terminal screw 36b and the terminal plate 36c in a state where the core wire of the electric wire is inserted into the rectangular tube portion 36e. The terminal block 36 is, for example, inserted into one of the square tube portions 36e with a ground conductor outside the lighting fixture 30 and screwed with one terminal screw 36b. In the terminal block 36, for example, the ground wire 8 from the ground mounting bracket 6 is inserted into the other side opposite to one of the square tube portions 36e, and is screwed with the other terminal screw 36b. The terminal block 36 electrically connects the ground wire and the ground wire 8 through the terminal plate 36c.

  Next, the construction process in the lighting fixture 30 of this embodiment is demonstrated easily.

  In the construction process, the power line, the control line, and the ground conductor exposed to the room side are passed through the insertion hole 31ca of the instrument body 31 through the ceiling material. In the construction process, the suspension bolt exposed to the indoor side is passed through the insertion hole 31cb through the ceiling material. For example, after a washer is passed through a suspension bolt, the instrument body 31 is fixed to a ceiling member by screwing a nut. In the construction process, each of the power line, the control line, and the ground conductor is connected to the terminal block 36 separately.

  Next, the pre-assembled light source unit 10 is accommodated in the recess 31aa of the instrument body 31. In the construction process, the hook 7 b of the light source unit 10 is hooked around the corresponding hook hole 31 k of the instrument body 31 to temporarily hold the light source unit 10 on the instrument body 31. Next, in the construction process, the terminal block 36 and the power supply device 3 are electrically connected by a connection line while the light source unit 10 is temporarily held in the instrument body 31. In the construction process, the terminal block 36 and the ground mounting bracket 6 are electrically connected by the ground wire 8 while the light source unit 10 is temporarily held in the instrument body 31. One of the ground wires 8 has a core wire screwed to the terminal block 36, and the other of the ground wires 8 opposite to one of the ground wires 8 is screwed to an insertion hole 6 ba provided in the flat plate portion 6 b of the ground mounting bracket 6 with a screw 9. Is done.

  Finally, in the construction process, the light source unit 10 is rotated with the catching hole 31k of the instrument body 31 as a fulcrum, and the light source unit 10 is accommodated in the recess 31aa of the instrument body 31, thereby comparing the luminaire 30 of the present embodiment. Easy installation.

  The luminaire 30 is not limited to a ceiling-mounted structure. As long as the fixture body 31 can hold the light source unit 10, the illumination fixture 30 can be appropriately used for illumination fixtures with other structures.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical idea according to the present invention.

DESCRIPTION OF SYMBOLS 1 Light source part 3 Power supply device 4 Attachment member 4a Attachment part 4b Side plate part 4aa 1st surface 4ab 2nd surface 6 Grounding attachment metal 6a Fixing part 6b Flat plate part 6j Projection piece 10 Light source unit 30 Lighting fixture 31 Appliance main body

Claims (4)

A light source unit, a mounting member formed of a metal material, the light source unit being mounted on a first surface, and a power supply device that is mounted on a second surface opposite to the first surface of the mounting member and supplies power to the light source unit And an earth mounting bracket attached to the second surface and electrically connected to the mounting member,
The ground mounting bracket has a fixed portion fixed to the mounting member, and a flat plate portion held by the fixed portion,
The light source unit, wherein the flat plate portion is disposed to face the second surface of the mounting member with a predetermined gap, and is electrically connected to a ground line.   The light source unit according to claim 1, wherein the fixing portion includes a caulking piece that is caulked to the attachment member. The attachment member has a plate-like attachment portion having the first surface and the second surface, and a side plate portion extending from the second surface in the thickness direction of the attachment portion,
The light source unit according to claim 1, wherein the fixing portion includes a protruding piece coupled to the side plate portion.   An illumination fixture comprising: the light source unit according to any one of claims 1 to 3; and a fixture main body that holds the light source unit.

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