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] As an example of a conventional light source unit, there is shown a 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, a long support member that supports 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 including 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. The wiring is electrically connected to the substrate through a through hole (through portion) provided in the support member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-081783 A 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 in a simpler process than in the conventional art. [Means for solving the problem]

[0006] 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 that is plate-shaped and has a first surface and a second surface that is the reverse side of the first surface, the substrate is attached to the first surface, and the power supply device is attached to the second surface, and a connection member that electrically connects the power supply circuit and the substrate. The mounting member is provided with a first through hole that penetrates 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 that faces the first through hole when viewed from the thickness direction of the mounting member. The connection member includes a rod-shaped conductor, a holder that is arranged between the substrate and the printed wiring board to guide the conductor, and a terminal member that is connected to the conductor. The holder has a socket that faces the first through hole and the second through hole and into which the conductor is inserted.

[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. Effect 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 as compared with the conventional examples. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is an exploded perspective view of a light source unit and a lighting fixture according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of the above lighting fixture. [Diagram 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. [Diagram 5] FIG. 5 is an exploded perspective view of a portion including a connection member of the light source unit. [Figure 6]Fig. 6A is a front view of the first terminal member of the light source unit, Fig. 6B is a top view of the first terminal member, Fig. 6C is a rear view of the first terminal member, and Fig. 6D is a right side view of the first terminal member. [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 portion 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 above, with a portion thereof omitted. [Figure 10] FIG. 10 is a cross-sectional view of the light source unit of the above, with a portion thereof omitted. [Figure 11] FIG. 11 is a top view of the light source unit of the above with a portion thereof omitted. [Figure 12] FIG. 12 is a bottom view of a main part of the light source unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A light source unit and a lighting fixture according to an embodiment of the present invention will be described in detail with reference to the drawings. However, each figure described in the following embodiment is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. In addition, in the following description, the up-down, left-right, front-rear directions of the light source unit and the lighting fixture are defined in the orientation shown in FIG. 1 unless otherwise specified. Note that the configuration described in the following embodiment is merely one example of the present invention. The present invention is not limited to the following embodiment, 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 the embodiment may be a lighting fixture that is attached to a place 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 attached to the fixture body 10 in a detachable manner.

[0013] The fixture body 10 is formed into a long, flat box shape with an open top surface (surface facing the ceiling 100) by bending a metal plate. 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 opposite the ceiling 100 (lower side). An inclined portion 12 is provided on each side of the recess 11 in the short side direction (front-rear direction) of the fixture body 10. The inclined portion 12 extends from the open end edge of the recess 11 in the short side direction (front-rear direction) of the fixture body 10 and inclines upward toward the outside.

[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 lower surface 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 tips 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 (eg, two) LED modules 22.

[0016] The LED modules 22 are arranged in a line in the longitudinal direction (left-right direction). Each LED module 22 has a substrate 221 formed in a rectangular plate shape 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) on the surface (lower surface) of the insulating substrate along the longitudinal direction (left-right direction) and in a line. Two input terminals 222 electrically connected to the connection member 5 are provided on any one of the LED modules 22 (see FIG. 5). The insulating substrate constituting the substrate 221 is preferably a resin insulating substrate such as a glass cloth-based epoxy resin substrate.

[0017] A pair of connectors 224 for power supply 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 in a direction away from each other (outward) is provided on the tip (upper end) of the pair of side plates 212 over the entire length. The above-mentioned LED module 22 is fixed to the mounting member 21 by a plurality of hook portions 216 formed by cutting and raising a part of the bottom plate 211 of the mounting member 21 (see FIG. 5). Each of the plurality of hook portions 216 is arranged on both sides of the short-side direction (front-rear direction) of the bottom plate 211 so as to be aligned at intervals along the longitudinal direction (left-right direction) of the bottom plate 211. The board 221 has a plurality of grooves 2211 into which the hooks 216 corresponding to each other 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 board 221. That is, the board 221 is inserted between the bottom plate 211 and the hooks 216 inserted into the corresponding grooves 2211 of the plurality of grooves 2211, and is fixed to the mounting member 21 (see FIG. 9). However, at least two of the hooks 216 (hooks 216A for fixing) that are located closest to the center of the longitudinal direction of the mounting member 21 fix the board 221 to the mounting member 21. The hooks 216, excluding the hooks 216A for fixing, among the plurality of hooks 216, prevent the board 221 from coming off 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 is formed in 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 from both ends toward the center in the front-rear direction (width direction) (see FIG. 2).

[0021] As shown in Fig. 2, the cover 23 is provided with extensions 232 at both ends in the front-rear direction. Each extension 232 is provided at a position overlapping with an 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 233 protruding upward (toward the mounting member 21) is provided over the entire length on the inside of the extension 232 in the short side direction (front-rear direction) of the cover 23. A protrusion 233A protruding inward is provided at the tip of each protruding wall 233. A support piece 233B protruding inward is provided near the base of each protruding wall 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 composed of a receptacle connector. A plug connector 251 (see FIG. 1) electrically connected to an electric wire 250 drawn from a terminal block 25 is plugged into the power input unit 400. 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 source 3 via the filter circuit 401 and the power input unit 400, and outputs a pulsating voltage (pulsating current) from a 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 rectifier element D1, and a smoothing capacitor C1. The boost circuit 403 converts the pulsating voltage output from the rectifier 402 into a DC voltage (for example, 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 output terminal 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 15V to 3V) 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 light-off 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 when the light output of the LED module 22 when the 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 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. To explain in more detail, 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 to generate a dimming signal so as to make the average value of the output current coincide with 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 a connector, a smoothing capacitor, and a common mode choke coil 4010 are mounted on the front surface (lower surface) of the printed wiring board 40 (see FIG. 4). Surface mount 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 (upper surface) of the printed wiring board 40. Here, the power input unit 400 is mounted on the surface of the end of the longitudinal direction (left-right direction) of the printed wiring board 40. The power input unit 400 has a terminal piece 4001 for frame grounding. The terminal piece 4001 is electrically connected to a contact for grounding that the power input unit 400 has. The terminal piece 4001 has a circular hole penetrating the thickness direction (up-down direction) of the terminal piece 4001. Further, a through hole connected to a 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 FIG. 2 and FIG. 4, the case 42 has a bottom plate 420, a pair of first side plates 421A, 421B rising from the short-side edge of the bottom plate 420, and a pair of second side plates 422A, 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 has 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, 422B. The fixing plate 423 is formed in a square gutter shape as shown in FIG. 2. In addition, a screw fixing portion 424 is provided at one end (left end) of the bottom plate 420 in the long-side direction. The screw fixing portion 424 is formed in a bridge shape protruding downward from the bottom plate 211. In addition, a screw hole is provided in the screw fixing portion 424.

[0032] Printed wiring board 40 is stored in case 42 with its back surface facing bottom plate 420, and is fixed to case 42 by four claws 4220 cut and raised from a pair of second side plates 422A, 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. Also, screw 4002 inserted into a hole in terminal piece 4001 passes through a through hole in printed wiring board 40 and is screwed into a screw hole in screw fastening portion 424 of case 42 (see FIG. 9).

[0033] As shown in FIG. 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, so that the case 42 is fixed to the mounting member 21. In a state where the case 42 is 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 piece 4001 of the power input part 400 is electrically connected to the case 42 via the screw 4002. Therefore, in a state where 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 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 in a thin rod shape (e.g., 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 mm.

[0035] The two first terminal members 51 are formed to have the same shape and the same dimensions. Therefore, one first terminal member 51 will be described below. 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 to form the plate material 510 in a square 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 formed integrally with the plate material 510 by cutting and raising the plate material 510 into a pentagonal shape. The tip portions 5120 of the three support pieces 512 face the insertion hole 511. Furthermore, 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 formed integrally with the plate material 510 by cutting the plate material 510 into a trapezoidal shape. The tips of the three guide pieces 513 face the insertion hole 511. Furthermore, the three guide pieces 513 are disposed one by one between the three support pieces 512 so as to surround the insertion hole 511 (see Figs. 6A and 6C). Note that the three support pieces 512 and the three guide pieces 513 are configured to be inclined 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 to two input terminal portions 222 provided on the substrate 221 in one-to-one correspondence. The two input terminal portions 222 are each formed of a land formed around a second through hole 2210 penetrating the substrate 221 in the thickness direction (up-down direction) on the surface (lower surface) of the substrate 221 (see FIG. 5). The two input terminal portions 222 are each electrically connected to the LEDs 220 via a conductor formed on the surface (lower surface) of the substrate 221. The two first terminal members 51 are each 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 the same dimensions. Therefore, the following will describe 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 FIG. 7 and FIG. 8, the second terminal member 52 has a first spring piece 520A, a second spring piece 520B, a first main piece 521A, a second main piece 521B, a connection piece 522, a bending piece 523, a terminal piece 524, and three hook claws 525. The first main piece 521A and the second main piece 521B are each formed in a rectangular plate shape. The connection piece 522 is formed in a rectangular plate shape. The connection piece 522 is connected to the first main piece 521A and the second main piece 521B at both ends in the front-rear direction. That is, the first main piece 521A and the second main piece 521B are mechanically connected via the connection piece 522 so as to face each other in the front-rear direction. The first spring piece 520A is formed in 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-right direction. That is, the first spring piece 520A and the second spring piece 520B are formed so that the distance between them narrows toward the tip. 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 and thin rectangular plate shape. The terminal piece 524 protrudes upward from the tip of the flexible piece 523. The three hook claws 525 are provided at the center of the first main piece 521A, the second main piece 521B, and the connection piece 522, respectively. The three hook claws 525 are cut and raised so that their upper ends face outward. The first spring piece 520A, the second spring piece 520B, the first main piece 521A, the second main piece 521B, the connection piece 522, the bending piece 523, the terminal piece 524, and the three hook claws 525 are preferably integrally formed 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 parts 405 provided on the printed wiring board 40 of the power supply device 4 in one-to-one correspondence. The two output terminal parts 405 are each composed of a land. Each land is formed around two through holes 43 penetrating the printed wiring board 40 in the thickness direction (upward and downward direction) on the back surface (upper surface) of the printed wiring board 40 (see FIG. 8). The terminal strip 524 of each second terminal member 52 is inserted into the through hole 43 of the output terminal part 405 that corresponds to it one-to-one among the two output terminal parts 405. Then, the terminal strip 524 of each second terminal member 52 is solder-joined to the output terminal part 405 on the back surface of the printed wiring board 40. In this way, the two second terminal members 52 are electrically connected to two output terminal parts 405 provided on the printed wiring board 40 of the power supply device 4 in one-to-one correspondence.

[0040] Here, the two second terminal members 52 are held by an electrically insulating holder 53. As shown in FIG. 7, the holder 53 is made of a rectangular parallelepiped synthetic resin molding. The holder 53 electrically insulates the two second terminal members 52 and mechanically holds them. 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 upper 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 upper surface of the holder 53 (see FIG. 8). Two insertion openings 531 are open in the lower surface of the holder 53 (see FIGS. 5 and 8). Each of the two plugs 531 is connected to a corresponding one of the two housing portions 530 (see FIG. 8). The inner surfaces of the two plugs 531 have an inclined surface that slopes toward the housing portion 530. The two second terminal members 52 are 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 advances into the corresponding plug 531 (see FIG. 8).

[0041] 7 and 8, the holder 53 has a pair of fixing parts 532. The pair of fixing parts 532 are formed in a columnar shape and protrude upward from both left and right ends of the upper surface of the holder 53. The pair of fixing parts 532 are press-fitted, one by one, into 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 parts 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 parts 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 parts 405 of the printed wiring board 40 by soldering. Furthermore, the holders 53 each holding the two second terminal members 52 are mechanically fixed to the printed wiring board 40.

[0043] First, a worker performing assembly work attaches power supply device 4 to the second surface (upper surface) of mounting member 21 so that bottom plate 211 of mounting member 21 covers the opening surface (lower surface) of case 42. When power supply device 4 is attached to mounting member 21, first through hole 213 provided in bottom plate 211 and holder 53 mounted on printed wiring board 40 overlap when viewed from the thickness direction (up-down direction) of 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 on 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 second terminal member 52 which corresponds to the conductor 50 one-to-one. 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-rear direction, so that each conductor 50 is electrically connected to the second terminal member 52 which corresponds to the conductor 50 one-to-one (see FIG. 8). Also, the first end 500 of each of the two conductors 50 is sandwiched between the three support pieces 512, so that each conductor 50 is electrically connected to the first terminal member 51 which corresponds to the conductor 50 one-to-one (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 connection member 5 (see FIG. 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 are caught 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 above-mentioned assembly process.

[0048] As described above, the light source unit 2 is configured such that the electrical connection between the power supply device 4 and the LED module 22 is completed simply by inserting each of 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] Moreover, 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 (the first end 500 of) the conductor 50 inserted into the insertion hole 511 and elastically deforms. 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. That is, even if the conductor 50 is inclined with respect to the insertion hole 511 of the plate material 510, the light source unit 2 can bring each tip portion 5120 of the support pieces 512 into contact with the conductor 50 by the elastic force of the multiple (for example, three) support pieces 512. As a result, the light source unit 2 can expand the allowable range of positional 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 inclination 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 larger 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 larger than the length along the longitudinal direction of the base portion 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 grooves 2211 and the hook portion 216 along the longitudinal direction of the substrate 221. Therefore, even if the amount of thermal expansion of the board 221 is greater than that of the mounting member 21, the board 221 can stretch in the longitudinal direction relative to the mounting member 21, thereby reducing the stress applied to the board 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 member 51 fixed to the substrate 221 and the second terminal member 52 indirectly fixed to the mounting member 21 via the case 42 shift. As described above, the connecting member 5 can maintain electrical connection via the conductor 50 even if the positions of the two first terminal members 51 and the two second terminal members 52 that correspond to each other one-to-one shift 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 positional shift between the first terminal member 51 and the second terminal member 52 in the connecting member 5, there is a possibility that the electrical connection via the conductor 50 cannot be maintained.

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

[0053] Moreover, the amount of expansion (stretch) of both substrate 221 and printed wiring board 40 increases the farther they are from their fixed positions on mounting member 21. Furthermore, when 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 the present 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 on the same side in the longitudinal direction of the mounting member 21 as viewed from the connection member 5 (see FIG. 9). That is, 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 expanding and contracting due to heat. 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 change amount of 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 deviation of the input terminal portion 222 and the output terminal portion 405 in the longitudinal direction of the mounting member 21. As a result, in the light source unit 2, the 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) can be reduced.

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

[0056] Then, the installer 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, respectively, 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. Then, when the installer 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 through 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 on the opposite side to 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 becomes easier to ensure the insulation distance between the member for fixing the substrate 221 (hook portion 216A) and the member for fixing the printed wiring board 40 (screw 4002) and the connecting member 5.

[0058] In the light source unit 2, at least a part 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 from 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 a range that faces the lower surface of the substrate 221 of the hook portion 216A. Meanwhile, the range G2 in which the printed wiring board 40 is fixed to the mounting member 21 is a range in which the head of the screw 4002 abuts against the lower surface of the printed wiring board 40. If at least a part of the range G1 overlaps with the range G2 in this way, 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 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 coefficient between the substrate 221 and the printed wiring board 40 is small, 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 further reduced.

[0060] In the light source unit 2, the connection 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 plate material having electrical conductivity and having an insertion hole 511 penetrating in the thickness direction. When viewed from the thickness direction of the substrate 221, the plate material is 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. 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, since the connection member 5 is configured as described above, 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 connection member 5 can be improved.

[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 board 221 is fixed to the mounting member 21 may overlap with the input terminal portion 222 (first terminal member 51) of the board 221 when viewed from 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 board 221 is fixed to the mounting member 21 overlaps with the input terminal portion 222 (first terminal member 51) of the board 221, it is possible to suppress change in the position of the input terminal portion 222 due to expansion and contraction of the board 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 a solid-state light-emitting element (LED220) and an input terminal portion (222) electrically connected to the solid-state light-emitting element (LED220). 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 element (LED220). The light source unit (2) includes an attachment member (21) to which the substrate (221) and the power supply device (4) are attached, and a connection 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 the power generated by the power supply circuit (49). The mounting member (21) is formed in a long plate shape having a first surface and a second surface that is the reverse side of 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) that penetrates from the first surface to the second surface. The input terminal portion (222) and the output terminal portion (405) are arranged at positions that overlap with the through hole (213) when viewed from the thickness direction of the mounting member (21). The connection 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) to the mounting member (21) and the fixing position (F2) of the printed wiring board (40) to the mounting member (21) are on the same side in the longitudinal direction of the mounting member (21) when viewed from the connection member (5).

[0064] In the light source unit (2) according to the first embodiment, the substrate (221) and the printed wiring board (40) expand and contract in the same direction, so that it is possible to reduce 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) can reduce stress applied to the wiring (the input terminal portion 222, the output terminal portion 405, and the connection 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 on the opposite side of the connecting member (5) with respect to the longitudinal center (center line α1) of the printed wiring board (40).

[0066] In the light source unit (2) according to the second embodiment, 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 connection member (5).

[0067] In the light source unit (2) of the third aspect, in the first or second aspect, it is preferable that at least a portion 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 in the short-side direction of the mounting member (21).

[0068] In the light source unit (2) according to the third embodiment, 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 connection 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 made 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 small. As a result, in the light source unit (2), the change in the difference (Z3) due to the 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 connection 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 connection 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 having electrical conductivity and having an insertion hole (511) penetrating in the thickness direction. When viewed from the thickness direction of the substrate (221), 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. 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) of the fifth aspect, the work 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 connection member (5) can be made easier.

[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 applied to the wiring (the input terminal portion 222, the output terminal portion 405, and the connection 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 Connection parts 10. Equipment 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 LED (Solid-state light-emitting element) 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 penetrating 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 conductor formed in a rod shape; a holder disposed between the substrate and the printed wiring board to guide the conductor; A terminal member connected to the conductor; having the holder has a socket facing the first through hole and the second through hole and into which the conductor is inserted; Light source unit.

2. The terminal member is a second terminal member, The connection member further includes a first terminal member, 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; The light source unit according to claim 1 .

3. the substrate has an input terminal portion electrically connected to the solid-state light-emitting element, The input terminal portion is electrically connected to the conductor inserted into the second through hole.

3. The light source unit according to claim 1 or 2.

4. A light source unit according to any one of claims 1 to 3, A fixture body supporting the light source unit; Equipped with Lighting fixtures.

Images