Light source unit and lighting fixture

Abstract

To achieve a simplified manufacturing process relative to the prior art.SOLUTION: A light source unit includes: a substrate 221 with an LED; a power supply device with a power circuit for supplying electricity to the LED; a mounting member 21, with the substrate 221 mounted on its first surface and the power supply device mounted on its second surface; and a connecting member for electrically connecting the power circuit and the substrate 221. The mounting member 21 is provided with a first through-hole 213, penetrating from the first surface to the second surface. The substrate 221 is provided with a second through-hole 2210, facing the first through-hole 213 when viewed in the thickness direction of the mounting member 21. The connecting member includes a rod-shaped conductor 50, a holder 53 disposed between the substrate 221 and a printed circuit board 40 to guide the conductor 50, and a terminal member connected to the conductor 50. The holder 53 faces the first through-hole 213 and the second through-hole 2210 and includes an insertion port 531 into which the conductor 50 is inserted.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a light source unit and a lighting fixture, and more particularly to a light source unit including a light source and a power supply device, and a lighting fixture including the light source unit. [Background technology]

[0002] An example of a conventional light source unit is the light emitting unit described in Patent Document 1. The light emitting unit described in Patent Document 1 includes long boards on each of which a plurality of light emitting elements (light emitting diodes) are mounted, long support members that support the boards, a power supply unit, and a long light-transmitting cover.

[0003] The substrate is attached to the underside of the support member. The translucent cover is attached to the underside of the support member and transmits light emitted from the multiple light-emitting elements. The power supply unit has a power supply substrate equipped with a lighting circuit (power supply circuit) for the light-emitting elements, a housing (power supply box) that houses the power supply substrate, and wiring for supplying power from the power supply circuit to the light-emitting elements. This wiring is electrically connected to the substrate through a through-hole (through-hole portion) provided in the support member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2016-081783 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a light source unit and a lighting fixture that can be manufactured using a simpler manufacturing process than conventional examples. [Means for solving the problem]

[0006] A light source unit according to one aspect of the present invention comprises a substrate having solid-state light-emitting elements, a power supply device having a power supply circuit for supplying power to the solid-state light-emitting elements, a mounting member having a plate shape with a first surface and a second surface opposite to the first surface, the substrate being mounted on the first surface and the power supply device being mounted on the second surface, and a connecting member electrically connecting the power supply circuit and the substrate. The mounting member is provided with a first through-hole penetrating from the first surface to the second surface. The power supply circuit outputs the power generated by the power supply circuit. Two The mounting member has a printed wiring board having an output terminal portion, and the board has a second through hole that faces the first through hole when viewed in the thickness direction of the mounting member. The connecting member is formed in a rod shape. Two a conductor disposed between the substrate and the printed wiring board; Two a holder for guiding the conductor; Two Conductor and One-on-one Connected Two The holder faces the first through hole and the second through hole, and Two It has a receptacle into which an electrical conductor is inserted. A light source unit according to one aspect of the present invention includes a substrate having solid-state light-emitting elements, a power supply device having a power supply circuit that supplies power to the solid-state light-emitting elements, a mounting member having a plate shape with a first surface and a second surface opposite the first surface, the substrate being attached to the first surface and the power supply device being attached to the second surface, and a connection member electrically connecting the power supply circuit and the substrate. The mounting member has a first through hole penetrating from the first surface to the second surface. The power supply circuit has a printed wiring board having an output terminal portion that outputs the power generated by the power supply circuit. The substrate has a second through hole facing the first through hole when viewed in the thickness direction of the mounting member. The connection member includes a rod-shaped conductor, a holder disposed between the substrate and the printed wiring board to guide the conductor, and first and second terminal members connected to the conductor. The holder has a socket facing the first and second through holes and into which the conductor is inserted. The first terminal member is configured to electrically and mechanically connect the end of the conductor to the output terminal portion via the second terminal member.

[0007] A lighting fixture according to one aspect of the present invention includes the light source unit and a fixture body that supports the light source unit. [Effects of the Invention]

[0008] The light source unit and lighting fixture of the present invention have the advantage that the manufacturing process can be simplified compared to conventional examples. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an exploded perspective view of a light source unit and a lighting fixture according to one embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the lighting fixture. [Figure 3] FIG. 3 is a circuit diagram of a power supply circuit of the power supply device of the light source unit. [Figure 4] FIG. 4 is a plan view of the power supply device. [Figure 5] FIG. 5 is an exploded perspective view of a part including a connection member of the light source unit. [Figure 6] 6A, 6B, 6C, and 6D are front, top, and right side views of the first terminal member of the light source unit of the same. [Figure 7] FIG. 7 is an exploded perspective view of a second terminal member and a holder of the light source unit. [Figure 8] FIG. 8 is a cross-sectional view of a part including a connection member of the light source unit. [Figure 9] FIG. 9 is a cross-sectional view of the light source unit of the same, with a portion thereof omitted. [Figure 10] FIG. 10 is a cross-sectional view of the light source unit of the same, with a portion thereof omitted. [Figure 11] FIG. 11 is a top view of the light source unit of the same, with a portion thereof omitted. [Figure 12] FIG. 12 is a bottom view of the main part of the light source unit. DETAILED DESCRIPTION OF THE INVENTION

[0010] A light source unit and a lighting fixture according to one embodiment of the present invention will be described in detail with reference to the drawings. However, the figures described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Furthermore, in the following description, unless otherwise specified, the up / down, left / right, and front / rear directions of the light source unit and the lighting fixture are defined in the orientation shown in FIG. 1. Note that the configuration described in the following embodiments is merely one example of the present invention. The present invention is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present invention can be achieved.

[0011] The lighting fixture 1 of this embodiment is a lighting fixture that is attached to a ceiling 100. However, the lighting fixture of this embodiment may be a lighting fixture that is attached to a location other than a ceiling, such as a wall.

[0012] 1 and 2, the lighting fixture 1 of this embodiment includes a light source unit 2 and a fixture body 10. The fixture body 10 is fixed to a hanging bolt 200 and directly attached to a ceiling 100. The light source unit 2 is detachably attached to the fixture body 10.

[0013] The fixture body 10 is formed by bending a metal plate into a long, flat box shape with an open top surface (the surface facing the ceiling 100). A rectangular recess 11 for accommodating the light source unit 2 is provided over the entire length of the fixture body 10 in the longitudinal direction (left-right direction) on the underside of the fixture body 10 on the side opposite the ceiling 100 (the lower side). Sloped portions 12 are provided on both sides of the recess 11 in the lateral direction (front-to-back direction) of the fixture body 10. The sloping portions 12 extend from the opening edge of the recess 11 in the lateral direction (front-to-back direction) of the fixture body 10 and are inclined upward and outward.

[0014] A hole 111A for passing the power line 30 is provided at approximately the center in the longitudinal direction (left-right direction) of the bottom plate 111 of the recess 11. Furthermore, holes 111B for passing the suspension bolts 200 are provided at positions near both ends in the longitudinal direction (left-right direction) of the bottom plate 111. A terminal block 25 is attached to the underside of the bottom plate 111. The terminal block 25 is electrically connected to the power line 30. Three electric wires 250 including a ground wire are drawn out from the terminal block 25. Furthermore, a plug connector 251 is electrically connected to the ends of these three electric wires 250.

[0015] 2 and 5, the light source unit 2 includes a light source section, an attachment member 21, a cover 23, a power supply device 4, and a connection member 5. The light source section includes a plurality of (for example, two) LED modules 22.

[0016] The LED modules 22 are arranged side by side in the longitudinal direction (left-right direction). Each LED module 22 has a substrate 221 formed in the shape of a rectangular plate that is long in the longitudinal direction (left-right direction). The substrate 221 has a long, rectangular, flat insulating substrate and a wiring conductor (copper foil) printed on the surface of the insulating substrate. The substrate 221 has a plurality of LEDs (light-emitting diodes) 220 mounted (disposed) in a row on the surface (underside) of the insulating substrate along the longitudinal direction (left-right direction). Each of the LED modules 22 is provided with two input terminals 222 that are electrically connected to the connection member 5 (see FIG. 5). The insulating substrate that constitutes the substrate 221 is preferably an insulating substrate made of resin, such as a glass cloth-based epoxy resin substrate.

[0017] A pair of connectors 224 for supplying power are mounted on the end of each LED module 22 facing the adjacent LED module 22 (see FIG. 2). The pair of connectors 224 of the two adjacent LED modules 22 are electrically connected to each other, so that lighting power is relayed from one LED module 22 to the other LED module 22.

[0018] The mounting member 21 is formed into a U-shape by bending a metal plate. The mounting member 21 includes a bottom plate 211 formed into a long, rectangular plate shape and a pair of side plates 212 extending upward from both ends of the bottom plate 211 in the short-side direction (front-rear direction). As shown in FIG. 2, a pair of inclined portions 212A inclined away from each other (outward) is provided at the leading ends (upper ends) of the pair of side plates 212 over their entire lengths. The LED module 22 described above is fixed to the mounting member 21 by a plurality of hook portions 216 formed by cutting and raising portions of the bottom plate 211 of the mounting member 21 (see FIG. 5). The plurality of hook portions 216 are arranged on both sides of the short-side direction (front-rear direction) of the bottom plate 211 so as to be spaced apart from each other along the longitudinal direction (left-right direction) of the bottom plate 211. The substrate 221 has a plurality of grooves 2211 into which corresponding hook portions 216 of the plurality of hook portions 216 are inserted (see FIG. 5). The plurality of grooves 2211 are formed to be aligned at intervals along the longitudinal direction (left-right direction) of the substrate 221. That is, the substrate 221 is fixed to the mounting member 21 by inserting the substrate 221 between the bottom plate 211 and the hook portion 216 inserted into the corresponding groove portion 2211 of the plurality of grooves 2211 (see FIG. 9). However, of the plurality of hook portions 216, at least two hook portions 216 (fixing hook portions 216A) that are located closest to the center of the mounting member 21 in the longitudinal direction fix the substrate 221 to the mounting member 21. The plurality of hook portions 216, excluding the fixing hook portion 216A, prevent the substrate 221 from slipping off from the mounting member 21.

[0019] The mounting member 21 has a pair of hook fittings 214 extending toward one end in the short side direction (front-to-back direction) at positions near both ends in the longitudinal direction (left-right direction), and a pair of hook springs 215 arranged at the other end in the short side direction (see Figure 1).

[0020] The cover 23 is made of a light-diffusing material (e.g., milky white acrylic resin) and has a long box shape with an open top surface (surface facing the mounting member 21). The cover 23 has a curved surface portion 231 in the shape of a convex lens that protrudes downward more gradually from both ends toward the center in the front-to-rear direction (width direction) (see FIG. 2).

[0021] As shown in Fig. 2, extending portions 232 are provided at both ends of the cover 23 in the front-rear direction. Each extending portion 232 is provided at a position that overlaps with the opening edge of the recess 11 of the fixture body 10 in the up-down direction when the light source unit 2 is attached to the fixture body 10. A protruding wall portion 233 that protrudes upward (toward the mounting member 21) is provided along the entire length on the inside of each extending portion 232 in the short side direction (front-rear direction) of the cover 23. A protrusion 233A that protrudes inward is provided at the tip of each protruding wall portion 233. A support piece 233B that protrudes inward is provided near the base of each protruding wall portion 233.

[0022] The power supply device 4 has a power supply circuit 49 configured by mounting electronic components on a printed wiring board 40, and a case 42 that houses the power supply circuit 49. A circuit diagram of the power supply circuit 49 is shown in Fig. 3. The power supply circuit 49 includes a power input unit 400, a filter circuit 401, a rectifier unit 402, a boost circuit 403, a step-down circuit 404, an output terminal unit 405, a main control circuit 406, a control power supply circuit 407, a dimming control circuit 408, a lights-out control circuit 409, and a signal input unit 410.

[0023] The power input unit 400 is made up of a receptacle connector. A plug connector 251 (see FIG. 1) is plugged into the power input unit 400 and is electrically connected to an electric wire 250 drawn out from the terminal block 25. The filter circuit 401 has a common mode choke coil 4010 and an across-the-line capacitor 4011. The rectifier unit 402 has a diode bridge. The rectifier unit 402 full-wave rectifies the AC voltage (AC current) input from the AC power supply 3 via the filter circuit 401 and the power input unit 400, and outputs a pulsating voltage (pulsating current) from the DC output terminal.

[0024] The boost circuit 403 is a conventionally known boost chopper circuit (power factor correction circuit). The boost circuit 403 includes a choke coil L1, a switching element Q1, a rectifying element D1, and a smoothing capacitor C1. The boost circuit 403 converts the pulsating voltage output from the rectifying unit 402 into a DC voltage (e.g., a DC voltage of 400 V) higher than the peak value of the pulsating voltage.

[0025] The step-down circuit 404 is a conventionally known step-down chopper circuit (buck converter). The step-down circuit 404 includes a switching element Q2, an inductor L2, a rectifier element D2, a resistor R1, and a smoothing capacitor C2. The step-down circuit 404 steps down the DC voltage (first DC voltage) output from the step-up circuit 403 to a DC voltage (second DC voltage) suitable for the LED module 22, which is a load. Each of the pair of output terminal units 405 is a land formed on (the upper surface of) the printed wiring board 40. Each output terminal unit 405 is electrically connected to a corresponding one of the pair of output terminals (both ends of the smoothing capacitor C2) of the step-down circuit 404.

[0026] The main control circuit 406 is configured to switch the switching element Q1 of the voltage step-up circuit 403 and the switching element Q2 of the voltage step-down circuit 404, respectively, to maintain the output voltage of the voltage step-up circuit 403 constant. Furthermore, the main control circuit 406 is configured to make the output current of the voltage step-down circuit 404 coincide with a target value. The control power supply circuit 407 is configured to generate a control voltage (for example, a DC voltage of about 15 V to 3 V) from the output voltage of the voltage step-up circuit 403. The main control circuit 406 operates on the control voltage supplied from the control power supply circuit 407.

[0027] The signal input unit 410 is made up of a receptacle connector. A control signal transmitted via a signal line is input to the dimming control circuit 408 and the lights-out control circuit 409 via the signal input unit 410.

[0028] The light-off control circuit 409 is configured to generate a light-off signal for turning off the lit LED module 22 in response to the control signal, and output the light-off signal to the main control circuit 406. Upon receiving the light-off signal, the main control circuit 406 is configured to stop switching of the switching element Q2, stop the step-down circuit 404, and turn off the LED module 22.

[0029] The dimming control circuit 408 is configured to generate a dimming signal in response to the control signal and output it to the main control circuit 406. The dimming signal is a signal for instructing the light output (dimming level) of the LED module 22. The dimming level is expressed as a ratio [%] of the average power per unit time supplied to the LED module 22 to the rated power, where the light output of the LED module 22 when rated power is supplied is 100%. For example, when the average power per unit time supplied to the LED module 22 is half the rated power, the dimming level is 50%. In other words, if the dimming level instructed by the control signal is 50%, the dimming control circuit 408 generates a dimming signal that instructs the average power per unit time supplied to the LED module 22 from the step-down circuit 404 to be half the rated power. The main control circuit 406 is configured to adjust the duty ratio of the switching element Q2 in response to the dimming signal received from the dimming control circuit 408. More specifically, the dimming control circuit 408 is configured to detect the output current of the step-down circuit 404 from the voltage across resistor R1, and generate a dimming signal so that the average value of the output current matches a target value corresponding to the dimming level.

[0030] The printed wiring board 40 includes a long, rectangular, flat insulating substrate and a wiring conductor (copper foil) printed on the back surface of the insulating substrate. So-called lead components, such as connectors, smoothing capacitors, and a common mode choke coil 4010, are mounted on the front surface (bottom surface) of the printed wiring board 40 (see FIG. 4). Surface-mounted components, such as a rectifier 402, a main control circuit 406, a dimming control circuit 408, and a lights-off control circuit 409, are mounted on the back surface (top surface) of the printed wiring board 40. The power input unit 400 is mounted on the surface of an end of the printed wiring board 40 in the longitudinal direction (left-right direction). The power input unit 400 has a terminal strip 4001 for frame grounding. The terminal strip 4001 is electrically connected to a ground contact of the power input unit 400. The terminal strip 4001 has a circular hole penetrating through the terminal strip 4001 in the thickness direction (up-down direction). Furthermore, a through hole connected to the hole of terminal strip 4001 is provided at an end of printed wiring board 40. Signal input unit 410 is mounted on the surface of the other end in the longitudinal direction (left-right direction) of printed wiring board 40. Note that the insulating substrate constituting printed wiring board 40 is preferably an insulating substrate made of resin, such as a paper-based phenolic resin substrate.

[0031] As shown in FIGS. 2 and 4, the case 42 includes a bottom plate 420, a pair of first side plates 421A and 421B rising from the short-side edge of the bottom plate 420, and a pair of second side plates 422A and 422B rising from the long-side edge of the bottom plate 420. That is, the case 42 is formed in a long box shape with an open surface (lower surface) facing the bottom plate 420. The case 42 includes a fixing plate 423 protruding outward from the tip of the second side plate 422A, which is one of the pair of second side plates 422A and 422B. The fixing plate 423 is formed in a square gutter shape as shown in FIG. 2. A screw fastening portion 424 is provided at one end (left end) of the bottom plate 420 in the long-side direction. The screw fastening portion 424 is formed in a bridge shape protruding downward from the bottom plate 420. A screw hole is provided in the screw fastening portion 424.

[0032] Printed wiring board 40 is housed in case 42 with its back surface facing bottom plate 420, and is fixed to case 42 with four claws 4220 cut out and raised from a pair of second side plates 422A and 422B (see FIG. 4). The socket of power input unit 400 protrudes outside case 42 through a rectangular window hole provided in first side plate 421B. Furthermore, screws 4002 inserted into holes in terminal strips 4001 pass through through holes in printed wiring board 40 and are screwed into screw holes in screw fastening portions 424 of case 42 (see FIG. 9).

[0033] 2, the power supply device 4 is attached to the upper surface (second surface) of the mounting member 21 of the light source unit 2 so that the bottom plate 420 of the case 42 faces up. Specifically, the second side plate 422B and the fixing plate 423 are screwed to the pair of side plates 212 of the mounting member 21, respectively, thereby fixing the case 42 to the mounting member 21. When attached to the mounting member 21, the opening of the case 42 is closed by the bottom plate 211 of the mounting member 21. Note that the terminal strip 4001 of the power input section 400 is electrically connected to the case 42 via the screw 4002. Therefore, when the light source unit 2 is attached to the fixture body 10, the ground potential of the power supply circuit 49 becomes equal to the potential of the fixture body 10 via the case 42 and the mounting member 21, which is electrically connected to the case 42.

[0034] 5, the connection member 5 includes two conductors 50, two first terminal members 51, and two second terminal members 52. Each of the two conductors 50 is formed into a thin rod shape (e.g., a cylindrical shape) from a conductive material such as copper or a copper alloy. The length of each of the two conductors 50 is preferably about several tens of millimeters.

[0035] The two first terminal members 51 are formed to have the same shape and the same dimensions. Therefore, the following description will focus on one first terminal member 51. As shown in FIGS. 6A to 6D, the first terminal member 51 has a plate material 510 made of a rectangular metal plate. Both ends of the plate material 510 in the longitudinal direction X1 are bent in the same direction along the thickness direction X3, thereby forming the plate material 510 into a rectangular gutter shape (see FIG. 6A). As shown in FIG. 6A, the first terminal member 51 has an insertion hole 511 penetrating the center of the plate material 510 (the center in the longitudinal direction X1 and the lateral direction X2). The first terminal member 51 preferably has a plurality of (e.g., three) support pieces 512 and a plurality of (e.g., three) guide pieces 513. The three support pieces 512 are each formed integrally with the plate material 510 by cutting and bending the plate material 510 into a pentagonal shape. Tip portions 5120 of the three support pieces 512 each face the insertion hole 511. The three support pieces 512 are arranged at equal intervals so as to surround the insertion hole 511 (see FIGS. 6A and 6C). The three guide pieces 513 are each formed integrally with the plate material 510 by cutting the plate material 510 into a trapezoidal shape. Tips of the three guide pieces 513 each face the insertion hole 511. The three guide pieces 513 are each disposed one by one between the three support pieces 512 so as to surround the insertion hole 511 (see FIGS. 6A and 6C). The three support pieces 512 and the three guide pieces 513 are each configured to incline in a direction away from the plate material 510 along the thickness direction X3 of the plate material 510 as they approach the insertion hole 511 (see FIGS. 6B and 6D).

[0036] These two first terminal members 51 are electrically connected in one-to-one correspondence with two input terminal portions 222 provided on the substrate 221. Each of the two input terminal portions 222 is configured as a land formed on the surface (lower surface) of the substrate 221 around a second through-hole 2210 that penetrates the substrate 221 in the thickness direction (up-down direction) (see FIG. 5). Each of the two input terminal portions 222 is electrically connected to the plurality of LEDs 220 via a conductor formed on the surface (lower surface) of the substrate 221. Each of the two first terminal members 51 is in one-to-one correspondence with the two input terminal portions 222, and it is preferable that the plate material 510 of each first terminal member 51 is solder-joined to the corresponding input terminal portion 222. Each first terminal member 51 is electrically connected to the corresponding input terminal portion 222 with the three support pieces 512 and the three guide pieces 513 inserted into the second through-holes 2210 of the corresponding input terminal portion 222 (see FIG. 9).

[0037] The two second terminal members 52 are formed to have the same shape and dimensions. Therefore, the following description will focus on one second terminal member 52. However, in the following description, the up-down, left-right, and front-rear directions of the second terminal member 52 are defined in Figures 7 and 8.

[0038] As shown in FIGS. 7 and 8 , the second terminal member 52 includes a first spring piece 520A, a second spring piece 520B, a first main piece 521A, a second main piece 521B, a connecting piece 522, a flexible piece 523, a terminal piece 524, and three hooking claws 525. The first main piece 521A and the second main piece 521B are each formed into a rectangular plate shape. The connecting piece 522 is also formed into a rectangular plate shape. Both ends of the connecting piece 522 in the front-rear direction are connected to the first main piece 521A and the second main piece 521B, respectively. In other words, the first main piece 521A and the second main piece 521B are mechanically connected via the connecting piece 522 so as to face each other in the front-rear direction. The first spring piece 520A is formed into a rectangular plate shape and protrudes downward from the lower end of the first main piece 521A. The first spring piece 520A is curved in a U-shape when viewed from the left-right direction. The second spring piece 520B is formed in a rectangular plate shape and protrudes downward from the lower end of the second main piece 521B. The second spring piece 520B is curved in a U-shape when viewed from the left and right. In other words, the first spring piece 520A and the second spring piece 520B are formed so that the distance between them narrows toward their tips. The flexible piece 523 is formed in a narrow rectangular plate shape. The flexible piece 523 protrudes from the upper end of the second main piece 521B in the front-rear direction toward the first main piece 521A. The terminal piece 524 is formed in a long, thin rectangular plate shape. The terminal piece 524 protrudes upward from the tip of the flexible piece 523. Three hooking claws 525 are provided at the centers of the first main piece 521A, the second main piece 521B, and the connecting piece 522, respectively. Each of the three hooking claws 525 is cut and raised so that its upper end faces outward. The first spring piece 520A, the second spring piece 520B, the first main piece 521A, the second main piece 521B, the connecting piece 522, the flexible piece 523, the terminal piece 524, and the three hooking claws 525 are preferably formed integrally by processing a metal plate such as copper or a copper alloy.

[0039] These two second terminal members 52 are electrically connected to two output terminal portions 405 provided on the printed wiring board 40 of the power supply device 4 in a one-to-one correspondence. Each of the two output terminal portions 405 is formed by a land. Each land is formed on the rear surface (top surface) of the printed wiring board 40 around two through holes 43 that penetrate the printed wiring board 40 in the thickness direction (vertical direction) (see FIG. 8). The terminal strip 524 of each second terminal member 52 is inserted into the through hole 43 of the corresponding one of the two output terminal portions 405. The terminal strip 524 of each second terminal member 52 is solder-joined to the output terminal portion 405 on the rear surface of the printed wiring board 40. In this way, the two second terminal members 52 are electrically connected to the two output terminal portions 405 provided on the printed wiring board 40 of the power supply device 4 in a one-to-one correspondence.

[0040] Here, the two second terminal members 52 are each held in an electrically insulating holder 53. As shown in FIG. 7, the holder 53 is made of a rectangular parallelepiped synthetic resin molded body. The holder 53 electrically insulates and mechanically holds the two second terminal members 52. The holder 53 has two accommodating sections 530 (see FIG. 7). Each of the two accommodating sections 530 accommodates a second terminal member 52 corresponding to one of the two second terminal members 52 (see FIG. 8). The top surface of each of the two accommodating sections 530 is open. The terminal pieces 524 of each of the two second terminal members 52 protrude from the opening in the top surface of the holder 53 (see FIG. 8). Two insertion openings 531 are open in the bottom surface of the holder 53 (see FIGS. 5 and 8). Each of the two sockets 531 is connected to a corresponding one of the two housing portions 530 (see FIG. 8). The inner surfaces of the two sockets 531 have an inclined surface that slopes toward the housing portion 530. Each of the two second terminal members 52 is prevented from coming off the housing portion 530 by hooking the tips of the three hooking claws 525 onto the inner wall surface of the housing portion 530 (see FIG. 8). However, a portion (lower end portion) of the first spring piece 520A and the second spring piece 520B of the second terminal member 52 housed in the corresponding housing portion 530 extends into the corresponding socket 531 (see FIG. 8).

[0041] 7 and 8, the holder 53 has a pair of fixing portions 532. The pair of fixing portions 532 are formed in a columnar shape and protrude upward from both the left and right ends of the upper surface of the holder 53. The pair of fixing portions 532 are press-fitted, one into each of two fixing holes 44 provided in the printed wiring board 40. In other words, the holder 53 is fixed to the printed wiring board 40 by press-fitting the pair of fixing portions 532 into the two fixing holes 44 of the printed wiring board 40 (see FIG. 8).

[0042] Next, the assembly process of the light source unit 2 will be described. However, each of the two first terminal members 51 is electrically connected to a corresponding one of the two input terminal portions 222 of the substrate 221 by soldering. Similarly, each of the two second terminal members 52 is electrically connected to a corresponding one of the two output terminal portions 405 of the printed wiring board 40 by soldering. Furthermore, holders 53 that respectively hold the two second terminal members 52 are mechanically fixed to the printed wiring board 40.

[0043] First, the worker performing the assembly work attaches the power supply device 4 to the second surface (upper surface) of the mounting member 21 so that the bottom plate 211 of the mounting member 21 covers the opening surface (lower surface) of the case 42. When the power supply device 4 is attached to the mounting member 21, the first through-hole 213 provided in the bottom plate 211 and the holder 53 mounted on the printed wiring board 40 overlap when viewed in the thickness direction (up-down direction) of the printed wiring board 40.

[0044] Next, the worker fixes the LED module 22 to the first surface (lower surface) of the bottom plate 211 of the mounting member 21. At this time, the two first terminal members 51 attached to the substrate 221 of the LED module 22 are arranged so as to overlap the corresponding one of the two sockets 531 of the holder 53 when viewed from the thickness direction (up-down direction) of the substrate 221 (see FIG. 8). That is, the first through-hole 213 is blocked by the substrate 221 of the LED module 22 on the first surface (lower surface) side of the bottom plate 211 (see FIG. 9). Therefore, the light source unit 2 of this embodiment does not require a member (for example, a tape with an adhesive applied to one side) for blocking the first through-hole 213, and costs can be reduced by reducing the number of parts and manufacturing processes.

[0045] Then, the worker inserts each of the two conductors 50 into the insertion hole 511 of the corresponding one of the two first terminal members 51. At this time, the upper end portion (second end portion 501) of the conductor 50 is guided into the insertion hole 511 by the lower surfaces (inclined surfaces) of the three support pieces 512 and the three guide pieces 513 arranged so as to surround the insertion hole 511. This allows the worker to easily insert the conductor 50 into the insertion hole 511. However, when the tip portions 5120 of the three support pieces 512 come into contact with the conductor 50, the three support pieces 512 are bent (elastically deformed) in the direction in which the conductor 50 is inserted (upward).

[0046] When an operator inserts the conductor 50 into the insertion hole 511, the upper end (second end 501) of the conductor 50 passes through the insertion port 531 of the holder 53 and is inserted between the first spring piece 520A and the second spring piece 520B of the corresponding second terminal member 52. That is, the second end 501 of each of the two conductors 50 is sandwiched between the first spring piece 520A and the second spring piece 520B from the front-to-rear direction, and each conductor 50 is electrically connected to the corresponding second terminal member 52 (see FIG. 8). Furthermore, the first end 500 of each of the two conductors 50 is sandwiched between the three support pieces 512, and each conductor 50 is electrically connected to the corresponding first terminal member 51 (see FIG. 8). As a result, each of the two input terminal portions 222 of the LED module 22 is electrically connected to a corresponding one of the two output terminal portions 405 of the power supply device 4 (power supply circuit 49) by the connecting member 5 (see Figure 8).

[0047] Finally, the worker assembles the cover 23 to the mounting member 21 with the opening side of the mounting member 21 facing upward. At this time, a pair of protrusions 233A provided on a pair of protruding walls 233 of the cover 23 catches on a pair of inclined portions 212A of a pair of side plates 212 of the mounting member 21, and the cover 23 is attached to the mounting member 21. The light source unit 2 is assembled through the assembly process described above.

[0048] As described above, the light source unit 2 is configured so that the electrical connection between the power supply device 4 and the LED module 22 is completed simply by inserting the two conductors 50 into the insertion holes 511 of the corresponding first terminal members 51. Therefore, the light source unit 2 can simplify the manufacturing process (of the light source unit 2) compared to conventional examples such as the light-emitting unit described in Patent Document 1.

[0049] Furthermore, in the light source unit 2, each of the two first terminal members 51 has three support pieces 512 provided on the plate material 510. Each of these three support pieces 512 is formed integrally with the plate material 510 so as to surround the insertion hole 511. Each of the three support pieces 512 is pressed by (a first end 500 of) the conductor 50 inserted into the insertion hole 511 and is elastically deformed. Furthermore, each of the three support pieces 512 is electrically connected to the conductor 50 at a tip portion 5120 pressed by the first end portion 500 of the conductor 50. In other words, even if the conductor 50 is tilted with respect to the insertion hole 511 of the plate material 510, the light source unit 2 can bring the tip portions 5120 of the support pieces 512 into contact with the conductor 50 due to the elastic force of the multiple (e.g., three) support pieces 512. As a result, the light source unit 2 can expand the tolerance for misalignment between the two first terminal members 51 and the two second terminal members 52 that correspond one-to-one to each other. Moreover, the stress applied to the solder that joins the plate material 510 of each of the two first terminal members 51 to each of the two input terminal portions 222 is less likely to be affected by the tilt of the conductor 50. Therefore, cracks are less likely to occur in the solder that joins the first terminal member 51 (the plate material 510) to the input terminal portion 222 compared to when the first terminal member 51 and the conductor 50 are fixed by solder bonding or the like.

[0050] Incidentally, the substrate 221 of the LED module 22 expands due to heat radiated from the lit LEDs 220 and heat radiated from the power supply circuit 49. The linear expansion coefficient of the synthetic resin (e.g., epoxy resin) forming the substrate 221 (insulating substrate) is several tens of times greater than the linear expansion coefficient of the metal (e.g., galvanized steel plate or stainless steel plate) forming the mounting member 21. Each of the multiple grooves 2211 provided in the substrate 221 is configured so that the length along the longitudinal direction of the substrate 221 is greater than the length along the longitudinal direction of the base of the hook portion 216. In other words, the substrate 221 can expand and contract along the longitudinal direction relative to the mounting member 21 by the difference in length between the groove 2211 and the hook portion 216 along the longitudinal direction of the substrate 221. Therefore, even if the thermal expansion of the substrate 221 is greater than that of the mounting member 21, the substrate 221 can stretch longitudinally relative to the mounting member 21, thereby reducing the stress applied to the substrate 221 from the hook portion 216 of the mounting member 21.

[0051] However, when the substrate 221 thermally expands and stretches in the longitudinal direction relative to the mounting member 21, the relative positions of the first terminal members 51 fixed to the substrate 221 and the second terminal members 52 indirectly fixed to the mounting member 21 via the case 42 become misaligned. As described above, the connecting member 5 can maintain electrical connection via the conductors 50 even if the positions of the two first terminal members 51 and two second terminal members 52 that correspond to each other are misaligned to some extent. However, if the amount of stretch (expansion) of the substrate 221 relative to the mounting member 21 exceeds the allowable range of misalignment between the first terminal members 51 and the second terminal members 52 in the connecting member 5, it may not be possible to maintain electrical connection via the conductors 50.

[0052] Meanwhile, printed wiring board 40 of power supply device 4 also expands due to heat radiated from lit LEDs 220 and heat radiated from power supply circuit 49. However, the insulating substrate constituting printed wiring board 40 and the insulating substrate constituting substrate 221 are made of the same type of material (for example, synthetic resin such as epoxy resin and phenolic resin). In other words, the difference in the linear expansion coefficient between substrate 221 and printed wiring board 40, which are made of the same type of material, is very small compared to the difference in the linear expansion coefficient between mounting member 21 and substrate 221, which are made of different types of materials such as synthetic resin and metal.

[0053] Furthermore, the amount of expansion (stretching) of both substrate 221 and printed wiring board 40 increases the further they are from their fixed positions on mounting member 21. Furthermore, if the fixed positions of substrate 221 and printed wiring board 40, as viewed from connection member 5, are on different sides in the longitudinal direction of mounting member 21, the positional deviation of input terminal portion 222 and output terminal portion 405 in the longitudinal direction of mounting member 21 increases.

[0054] In contrast, in the light source unit 2 of this embodiment, the fixing position F1 of the substrate 221 relative to the mounting member 21 and the fixing position F2 of the printed wiring board 40 relative to the mounting member 21 are located on the same side of the mounting member 21 in the longitudinal direction as viewed from the connecting member 5 (see FIG. 9 ). In other words, the substrate 221 and the printed wiring board 40 expand and contract in the same direction in the longitudinal direction of the mounting member 21 when thermally expanding or contracting. Here, the difference between the shortest distance Z1 between the fixing position F1 and the conductor 50 and the shortest distance Z2 between the fixing position F2 and the conductor 50 is defined as Z3 (=|Z1-Z2|). In the light source unit 2, the substrate 221 and the printed wiring board 40 expand and contract in the same direction, so that the amount of change in the difference Z3 due to the expansion and contraction of the substrate 221 and the printed wiring board 40 can be reduced. Therefore, the light source unit 2 can reduce the positional misalignment of the input terminal portion 222 and the output terminal portion 405 in the longitudinal direction of the mounting member 21. As a result, the light source unit 2 can reduce stress applied to the wiring from the power supply device 4 to the LED module 22 (the input terminal portion 222, the output terminal portion 405, and the connection member 5).

[0055] Next, the installation procedure for lighting fixture 1 will be described. First, as shown in FIG. 1, the installer inserts power line 30 and signal line, which have been previously wired above the ceiling, into hole 111A in fixture body 10, and then passes each of suspension bolts 200 exposed to the room side through corresponding holes 111B. After that, the installer screws nuts 300 onto each suspension bolt 200 to secure fixture body 10 to ceiling 100. After that, the installer connects power line 30 to terminal block 25, and further inserts plug connector 251 of terminal block 25 into power input unit 400 (see FIG. 4) of power supply device 4. Next, the installer electrically connects the signal line to signal input unit 410 (see FIG. 4) of power supply device 4.

[0056] The installer then hooks the tips of the pair of hooking fittings 214 into a pair of insertion holes 112A provided in one side plate 112 of the fixture body 10, and then hooks the pair of hooking springs 215 into the hook portions 1120 provided in the other side plate 112 of the fixture body 10. When the installer then rotates the light source unit 2 so as to lift it up, using the hooking fittings 214 as a fulcrum, the hooking springs 215 return to their original state while still hooked on the hook portions 1120, and the spring force of the hooking springs 215 holds the light source unit 2 to the fixture body 10. The lighting fixture 1 is installed on the ceiling 100 using the above-mentioned procedure.

[0057] Here, in the light source unit 2, the fixing position F1 of the substrate 221 and the fixing position F2 of the printed wiring board 40 are located on the opposite side of the connecting member 5 with respect to the center (center line α1) in the longitudinal direction of the printed wiring board 40 (see FIG. 9). In the light source unit 2, it is easy to ensure an insulation distance between the connecting member 5 and the member (hook portion 216A) that fixes the substrate 221 and the member (screw 4002) that fixes the printed wiring board 40.

[0058] Furthermore, in the light source unit 2, at least a portion of the range G1 in which the substrate 221 is fixed to the mounting member 21 overlaps with a range G2 in which the printed wiring board 40 is fixed to the mounting member 21 when viewed in the short-side direction (front-rear direction) of the mounting member 21 (see FIG. 10 ). The range G1 in which the substrate 221 is fixed to the mounting member 21 is the range in which the hook portion 216A faces the lower surface of the substrate 221. On the other hand, the range G2 in which the printed wiring board 40 is fixed to the mounting member 21 is the range in which the head of the screw 4002 abuts against the lower surface of the printed wiring board 40. If at least a portion of the range G1 overlaps with the range G2 in this way, the amount of change in the difference Z3 due to expansion and contraction of the substrate 221 and the printed wiring board 40 can be further reduced.

[0059] Moreover, in the light source unit 2, the substrate 221 and the printed wiring board 40 are formed of insulating substrates made of synthetic resin. Therefore, the difference in the linear expansion coefficients of the substrate 221 and the printed wiring board 40 is small, and the amount of change in the difference Z3 due to expansion and contraction of the substrate 221 and the printed wiring board 40 can be further reduced.

[0060] In the light source unit 2, the connecting member 5 includes a rod-shaped conductor 50, a first terminal member 51, and a second terminal member 52. The first terminal member 51 includes a conductive plate member having an insertion hole 511 penetrating in the thickness direction. When viewed in the thickness direction of the substrate 221, the plate member is electrically connected to the input terminal portion 222 such that a hole penetrating the input terminal portion 222 overlaps with the insertion hole 511. The first terminal member 51 is configured to electrically and mechanically connect the first end portion 500 of the conductor 50 to the input terminal portion 222. The second terminal member 52 is configured to electrically and mechanically connect the second end portion 501 of the conductor 50 to the output terminal portion 405 through the first through hole 213. In the light source unit 2, the connecting member 5 is configured as described above, which improves the workability of electrically connecting the input terminal portion 222 of the substrate 221 to the output terminal portion 405 of the printed wiring board 40 using the connecting member 5.

[0061] Here, the positions of the fixing position F2 (screw fastening portion 424) of the printed wiring board 40 and the output terminal portion 405 (terminal strip 524) may be misaligned in the short-side direction (front-rear direction) of the mounting member 21 (see FIG. 11). In other words, the positions of the fixing position F2 of the printed wiring board 40 and the output terminal portion 405 (terminal strip 524) do not need to be aligned in a straight line along the longitudinal direction of the mounting member 21.

[0062] 12, the range G1 in which the substrate 221 is fixed to the mounting member 21 may overlap with the input terminal portion 222 (first terminal member 51) of the substrate 221 when viewed in the short side direction (front-rear direction) of the mounting member 21. In the light source unit 2, if the range G1 in which the substrate 221 is fixed to the mounting member 21 overlaps with the input terminal portion 222 (first terminal member 51) of the substrate 221, it is possible to suppress changes in the position of the input terminal portion 222 due to expansion and contraction of the substrate 221.

[0063] As is clear from the above-described embodiment, the light source unit (2) according to the first aspect of the present invention includes a long substrate (221) having solid-state light-emitting elements (LEDs 220) and an input terminal portion (222) electrically connected to the solid-state light-emitting elements (LEDs 220). The light source unit (2) includes a power supply device (4) having a power supply circuit (49) that supplies power to the solid-state light-emitting elements (LEDs 220). The light source unit (2) includes a mounting member (21) to which the substrate (221) and the power supply device (4) are attached, and a connecting member (5) that electrically connects the power supply circuit (49) and the input terminal portion (222). The power supply circuit (49) includes a printed wiring board (40). The printed wiring board (40) is formed in a long plate shape using the same material as the substrate (221), and includes an output terminal portion (405) that outputs power generated by the power supply circuit (49). The mounting member (21) is formed in the shape of a long plate having a first surface and a second surface opposite to the first surface. A board (221) is attached to the first surface, and a power supply device (4) is attached to the second surface. Furthermore, the mounting member (21) is provided with a through-hole (213) penetrating from the first surface to the second surface. The input terminal portion (222) and the output terminal portion (405) are disposed at positions overlapping with the through-hole (213) when viewed from the thickness direction of the mounting member (21). The connecting member (5) is configured to electrically connect the input terminal portion (222) and the output terminal portion (405) through the through-hole (213). The fixing position (F1) of the board (221) relative to the mounting member (21) and the fixing position (F2) of the printed wiring board (40) relative to the mounting member (21) are on the same side of the mounting member (21) in the longitudinal direction when viewed from the connecting member (5).

[0064] In the light source unit (2) according to the first aspect, the substrate (221) and the printed wiring board (40) expand and contract in the same direction, which reduces misalignment of the input terminal portion (222) and the output terminal portion (405) in the longitudinal direction of the mounting member (21) caused by expansion and contraction of the substrate (221) and the printed wiring board (40). As a result, the light source unit (2) reduces stress applied to the wiring (input terminal portion 222, output terminal portion 405, and connecting member 5) from the power supply device (4) to the solid-state light emitting element (LED 220).

[0065] In the light source unit (2) according to the second aspect, in the first aspect, it is preferable that the fixing position (F1) of the substrate (221) and the fixing position (F2) of the printed wiring board (40) are located on the opposite side of the connecting member (5) from the longitudinal center (center line α1) of the printed wiring board (40).

[0066] In the light source unit (2) according to the second aspect, it is easy to ensure the insulation distance between the member (hook portion 216A) for fixing the substrate (221) and the member (screw 4002) for fixing the printed wiring board (40) and the connecting member (5).

[0067] In the light source unit (2) according to the third aspect, in the first or second aspect, it is preferable that at least a part of the area in which the substrate (221) is fixed to the mounting member (21) overlaps with the area in which the printed wiring board (40) is fixed to the mounting member (21) when viewed from the short side direction of the mounting member (21).

[0068] In the light source unit (2) according to the third aspect, the change in the difference (Z3) due to the expansion and contraction of the substrate (221) and the printed wiring board (40) can be reduced, and the stress applied to the wiring (the input terminal portion 222, the output terminal portion 405, and the connecting member 5) can be further reduced.

[0069] In the light source unit according to the fourth aspect, in any one of the first to third aspects, the substrate (221) and the printed wiring board (40) are preferably formed of an insulating substrate made of synthetic resin.

[0070] In the light source unit (2) according to the fourth aspect, the difference in the linear expansion coefficient between the substrate (221) and the printed wiring board (40) is reduced. As a result, in the light source unit (2), the amount of change in the difference (Z3) due to expansion and contraction of the substrate (221) and the printed wiring board (40) is reduced, and the stress applied to the wiring (the input terminal portion 222, the output terminal portion 405, and the connecting member 5) can be further reduced.

[0071] In the light source unit (2) according to the fifth aspect, in any of the first to fourth aspects, the connecting member (5) preferably includes a rod-shaped conductor (50), a first terminal member (51), and a second terminal member (52). The first terminal member (51) preferably includes a plate material that is conductive and has an insertion hole (511) penetrating in the thickness direction. The plate material is preferably electrically connected to the input terminal portion (222) such that a hole penetrating the input terminal portion (222) and the insertion hole (511) overlap each other when viewed in the thickness direction of the substrate (221). The first terminal member (51) is preferably configured to electrically and mechanically connect a first end portion (500) of the conductor (50) to the input terminal portion (222). The second terminal member (52) is preferably configured to electrically and mechanically connect a second end portion (501) of the conductor (50) to the output terminal portion (405) through the through hole (213).

[0072] In the light source unit (2) according to the fifth aspect, the workability of electrically connecting the input terminal portion (222) of the substrate (221) and the output terminal portion (405) of the printed wiring board (40) by the connecting member (5) can be improved.

[0073] A lighting fixture (1) according to a sixth aspect includes the light source unit (2) according to any one of the first to fifth aspects and a fixture body (10) that supports the light source unit (2).

[0074] In the lighting fixture (1) according to the sixth aspect, it is possible to reduce stress on the wiring (input terminal portion 222, output terminal portion 405, and connecting member 5) from the power supply device (4) to the solid-state light emitting element (LED 220). [Explanation of symbols]

[0075] 1. Lighting equipment 2 Light source unit 4 Power supply 5. Connecting members 10. Instrument body 21 Mounting material 40 Printed wiring board 49 Power supply circuit 50 Conductors 51 first terminal member 52 second terminal member 53 Holder 213 First through hole 220 LEDs (solid-state light-emitting elements) 221 Substrate 222 Input terminal section 405 Output terminal section 531 Outlet 2210 Second through hole

Claims

1. a substrate having a solid-state light emitting device; a power supply device having a power supply circuit for supplying power to the solid-state light-emitting element; a mounting member having a plate shape with a first surface and a second surface opposite to the first surface, the substrate being mounted on the first surface and the power supply device being mounted on the second surface; a connection member that electrically connects the power supply circuit and the substrate; Equipped with the mounting member is provided with a first through-hole that penetrates from the first surface to the second surface, the power supply circuit includes a printed wiring board having two output terminal portions for outputting the power generated by the power supply circuit; the substrate has a second through hole facing the first through hole when viewed in a thickness direction of the mounting member, The connecting member is Two conductors formed in a rod shape; a holder disposed between the substrate and the printed wiring board to guide the two conductors; two terminal members connected to the two conductors in a one-to-one correspondence; and the holder has insertion holes facing the first through hole and the second through hole, into which the two conductors are inserted; Light source unit.

2. The terminal member is a second terminal member, The connection member further includes two first terminal members, the two first terminal members are configured to electrically and mechanically connect ends of corresponding ones of the two conductors to corresponding ones of the two output terminal portions via corresponding ones of the two second terminal members; The light source unit according to claim 1 .

3. the substrate has two input terminal portions electrically connected to the solid-state light-emitting elements, The light source unit according to claim 1 , wherein the two input terminal portions are electrically connected in a one-to-one relationship to the two conductors inserted into the second through holes.

4. A substrate having a solid-state light emitting element; a power supply device having a power supply circuit for supplying power to the solid-state light-emitting element; a mounting member having a plate shape with a first surface and a second surface opposite to the first surface, the substrate being mounted on the first surface and the power supply device being mounted on the second surface; a connection member that electrically connects the power supply circuit and the substrate; Equipped with the mounting member is provided with a first through-hole that penetrates from the first surface to the second surface, the power supply circuit includes a printed wiring board having an output terminal portion for outputting the power generated by the power supply circuit, the substrate has a second through hole facing the first through hole when viewed in a thickness direction of the mounting member, The connecting member is a rod-shaped conductor; a holder disposed between the substrate and the printed wiring board to guide the conductor; a first terminal member and a second terminal member connected to the conductor; and the holder has a socket facing the first through hole and the second through hole and into which the conductor is inserted; the first terminal member is configured to electrically and mechanically connect an end of the conductor to the output terminal portion via the second terminal member; Light source unit.

5. A light source unit according to any one of claims 1 to 4, a fixture body that supports the light source unit; Equipped with Lighting fixtures.

Images