JP2024003128A - Light source unit and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a manufacturing process in comparison with a conventional example.

SOLUTION: A light source unit comprises: a board 221 comprising an LED; a printed wiring board 40 constituting a power supply circuit for supplying power to the LED via terminal members (a first terminal member 51 and a second terminal member 52); a fitting member 21 in which the board 221 is attached to a first surface, and the printed wiring board 40 is arranged on the side of a second surface; a conductive body 50 for electrically connecting the power supply circuit and the board 221; and a holder 53 arranged on the side of the second surface of the fitting member 21, and for guiding the conductive body 50. The printed wiring board 40, the holder 53, the fitting member 21, and the board 221 are arranged side by side along the conductive body 50 in order. At least the holder 53, the fitting member 21, and the board 221 are arranged side by side along a direction in which the first surface and the second surface are arranged side by side, in order. The conductive body 50 passes through the holder 53, the fitting member 21, and the board 221.

SELECTED DRAWING: Figure 8

COPYRIGHT: (C)2024,JPO&INPIT

Description

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.

As a conventional example of a light source unit, a light emitting unit described in Patent Document 1 is exemplified. The light emitting unit described in Patent Document 1 includes an elongated substrate on which a plurality of light emitting elements (light emitting diodes) are mounted, an elongated support member that supports the substrate, a power supply section, and an elongated light-transmitting element. Equipped with a sex cover.

The substrate is attached to the lower surface of the support member. The translucent cover is attached to the lower surface of the support member and transmits light emitted from the plurality of light emitting elements. The power supply section includes a power supply board that includes a lighting circuit (power supply circuit) for the light emitting element, a casing (power supply box) that houses the power supply board inside, and wiring for supplying power from the power supply circuit to the light emitting element. have. This wiring is electrically connected to the substrate through a through hole (penetration part) provided in the support member.

JP2016-081783A

An object of the present invention is to provide a light source unit and a lighting fixture whose manufacturing process can be simplified compared to conventional examples.

A light source unit according to one aspect of the present invention includes a substrate having a solid-state light emitting element, a printed wiring board that constitutes a power supply circuit that supplies power to the solid-state light emitting element via a terminal member, a first surface and the first surface. a mounting member that is plate-shaped and has a second surface that is the back surface of the surface, the substrate is attached to the first surface, and the printed wiring board is disposed on the second surface; and the power supply circuit. The device includes a conductor that electrically connects the substrate, and a holder that is disposed on the second surface side of the mounting member and guides the conductor. The printed wiring board, the holder, the mounting member, and the substrate are arranged in order along the conductor. At least the holder, the mounting member, and the substrate are arranged in order along the direction in which the first surface and the second surface are arranged. The conductor passes through the holder, the mounting member, and the substrate.

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.

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.

FIG. 1 is an exploded perspective view of a light source unit and a lighting fixture according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the same lighting fixture. FIG. 3 is a circuit diagram of the power supply circuit of the power supply device of the light source unit same as above. FIG. 4 is a plan view of the power supply device same as above. FIG. 5 is an exploded perspective view of a portion of the light source unit, including a connecting member. FIG. 6A is a front view of the first terminal member of the light source unit same as above. FIG. 6B is a top view of the first terminal member same as above. FIG. 6C is a rear view of the first terminal member same as above. FIG. 6D is a right side view of the first terminal member same as above. FIG. 7 is an exploded perspective view of the second terminal member and holder of the light source unit same as above. FIG. 8 is a sectional view of a portion of the light source unit same as above, including a connecting member. FIG. 9 is a partially omitted cross-sectional view of the light source unit same as the above. FIG. 10 is a partially omitted sectional view of the light source unit same as above. FIG. 11 is a partially omitted top view of the light source unit same as above. FIG. 12 is a bottom view of essential parts of the light source unit same as above.

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 embodiment below is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual size ratio. In the following description, unless otherwise specified, the vertical, horizontal, and front-back directions of the light source unit and the lighting fixture are defined in the orientation shown in FIG. Note that the configuration described in the following embodiments is only an example of the present invention. The present invention is not limited to the following embodiments, and various changes can be made according to the design etc. as long as the effects of the present invention can be achieved.

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 the ceiling, such as a wall.

The lighting fixture 1 of this embodiment includes a light source unit 2 and a fixture body 10, as shown in FIGS. 1 and 2. The appliance main body 10 is fixed to a hanging bolt 200 and directly attached to the ceiling 100. The light source unit 2 is detachably attached to the instrument body 10.

The appliance main body 10 is formed by bending a sheet metal 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 on the lower surface of the appliance body 10 on the opposite side (lower side) of the ceiling 100 over the entire length of the appliance body 10 in the longitudinal direction (horizontal direction). Slanted portions 12 are provided on both sides of the recessed portion 11 in the transverse direction (front-back direction) of the instrument body 10, respectively. The inclined portion 12 extends from the opening edge of the recessed portion 11 in the lateral direction (front-back direction) of the instrument main body 10 and slopes upward toward the outside.

A hole 111A through which the power supply line 30 is passed is provided approximately at the center of the bottom plate 111 of the recess 11 in the longitudinal direction (left-right direction). Furthermore, holes 111B for passing the hanging bolts 200 are provided at positions near both ends of the bottom plate 111 in the longitudinal direction (left-right direction). 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 grounding 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.

The light source unit 2 includes a light source section, a mounting member 21, a cover 23, a power supply device 4, and a connection member 5, as shown in FIGS. 2 and 5. The light source section includes a plurality of (for example, two) LED modules 22.

The plurality of LED modules 22 are arranged side by side in the longitudinal direction (horizontal 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 board 221 includes a long rectangular flat insulating board and a wiring conductor (copper foil) printed on the surface of the insulating board. In the substrate 221, a plurality of LEDs (light emitting diodes) 220 are mounted (arranged) in a row along the longitudinal direction (left-right direction) on the front surface (lower surface) of the insulating substrate. Two input terminal portions 222 electrically connected to the connection member 5 are provided on any one of the plurality of LED modules 22 (see FIG. 5). Note that the insulating substrate constituting the substrate 221 is preferably an insulating substrate made of resin, such as a glass cloth-based epoxy resin substrate.

A pair of connectors 224 for power supply are mounted at the end of each LED module 22 facing the adjacent LED module 22 (see FIG. 2). Then, by electrically connecting the pair of connectors 224 of both adjacent LED modules 22, lighting power is relayed from one LED module 22 to the other LED module 22.

The mounting member 21 is formed into a U-shape by bending a sheet metal. The mounting member 21 includes a bottom plate 211 formed in an elongated rectangular plate shape, and a pair of side plates 212 extending upward from both ends of the bottom plate 211 in the lateral direction (front-back direction). As shown in FIG. 2, at the tips (upper ends) of the pair of side plates 212, a pair of inclined portions 212A that are inclined away from each other (outward) are provided over the entire length. The LED module 22 described above is fixed to the mounting member 21 by a plurality of hooks 216 formed by cutting and raising a part of the bottom plate 211 of the mounting member 21 (see FIG. 5). The plurality of hooks 216 are arranged on both sides of the bottom plate 211 in the lateral direction (front-back direction) so as to be spaced apart from each other along the longitudinal direction (left-right direction) of the bottom plate 211. The board 221 has a plurality of grooves 2211 into which one-to-one corresponding hooks 216 among the plurality of hooks 216 are inserted (see FIG. 5). Each of the plurality of groove portions 2211 is formed so as to be lined up at intervals along the longitudinal direction (horizontal direction) of the substrate 221. That is, the board 221 is fixed to the mounting member 21 by being inserted between the bottom plate 211 and the hook part 216 inserted into the corresponding one of the plurality of grooves 2211 (see FIG. 9). However, among the plurality of hooks 216, at least two hooks 216 (fixing hooks 216A) located closest to the longitudinal center of the mounting member 21 fix the board 221 to the mounting member 21. are doing. Among the plurality of hooks 216, the plurality of hooks 216 excluding the fixing hook 216A prevent the board 221 from coming off from the mounting member 21.

The mounting member 21 includes a pair of hooks 214 extending toward one end in the transverse direction (front-back direction) at positions near both ends in the longitudinal direction (left-right direction), and a pair of hooks disposed at the other end in the transverse direction. It has a spring 215 (see FIG. 1).

The cover 23 is made of a light-diffusing material (for example, a milky white acrylic resin) and is formed into a long box shape with an open top surface (the 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).

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 overlapping the opening edge of the recess 11 of the instrument body 10 in the vertical direction when the light source unit 2 is attached to the instrument body 10. Projecting wall portions 233 that protrude upward (toward the attachment member 21 side) are provided over the entire length inside the extension portions 232 in the lateral direction (front-back direction) of the cover 23 . A protrusion 233A that protrudes inward is provided at the tip of each protruding wall 233. Near the base of each projecting wall portion 233, support pieces 233B project inward, respectively.

The power supply device 4 includes 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. The power supply circuit 49 includes a power input section 400, a filter circuit 401, a rectification section 402, a boost circuit 403, a step down circuit 404, an output terminal section 405, a main control circuit 406, a control power supply circuit 407, a dimming control circuit 408, and a lights-off control circuit. 409 and a signal input section 410.

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

The boost circuit 403 is a conventionally well-known boost chopper circuit (power factor correction circuit). The booster circuit 403 includes a choke coil L1, a switching element Q1, a rectifying element D1, and a smoothing capacitor C1. The booster circuit 403 converts the pulsating voltage output from the rectifier 402 into a DC voltage (for example, 400V DC voltage) higher than the peak value of the pulsating voltage.

The step-down circuit 404 is a conventionally well-known step-down chopper circuit (buck converter). The voltage step-down circuit 404 includes a switching element Q2, an inductor L2, a rectifying 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 as a load. Each of the pair of output terminal portions 405 is a land formed on the printed wiring board 40 (upper surface). Each output terminal section 405 is electrically connected to a corresponding one of the pair of output terminals (both ends of the smoothing capacitor C2) of the voltage down converter 404.

Main control circuit 406 is configured to switch switching element Q1 of booster circuit 403 and switching element Q2 of bucker circuit 404, respectively, and maintain the output voltage of booster circuit 403 constant. Furthermore, the main control circuit 406 is configured to match the output current of the voltage step-down circuit 404 to 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 booster circuit 403. The main control circuit 406 operates with a control voltage supplied from a control power supply circuit 407.

Signal input section 410 consists of a receptacle connector. A control signal transmitted via the signal line is input to the dimming control circuit 408 and the lights-off control circuit 409 via the signal input section 410.

The lights-off control circuit 409 is configured to generate a lights-off signal for turning off the LED module 22 that is on, and output it to the main control circuit 406 in response to the control signal. When the main control circuit 406 receives the lights-off signal, it is configured to stop switching the switching element Q2, stop the step-down circuit 404, and turn off the LED module 22.

The dimming control circuit 408 is configured to generate a dimming signal and output it to the main control circuit 406 in response to the control signal. 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, assuming that the light output of the LED module 22 when the rated power is supplied is 100%. be done. For example, when the average power per unit time supplied to the LED module 22 is half of 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 makes the average power per unit time supplied from the step-down circuit 404 to the LED module 22 half of the rated power. Generates a dimming signal that instructs the The main control circuit 406 is configured to adjust the duty ratio of the switching element Q2 according to the dimming signal received from the dimming control circuit 408. To explain in more detail, the dimming control circuit 408 detects the output current of the step-down circuit 404 from the voltage across the resistor R1, and adjusts the output current so that the average value of the output current matches the target value corresponding to the dimming level. configured to generate an optical signal.

The printed wiring board 40 includes an elongated 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). Then, surface mount components such as a rectifying section 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. Here, the power input section 400 is mounted on the surface of the end portion of the printed wiring board 40 in the longitudinal direction (horizontal direction). The power input section 400 has a terminal piece 4001 for frame grounding. The terminal piece 4001 is electrically connected to a grounding contact that the power input section 400 has. The terminal piece 4001 has a circular hole that penetrates in the thickness direction (vertical direction) of the terminal piece 4001. Furthermore, a through hole that connects to the hole of the terminal piece 4001 is provided at the end of the printed wiring board 40. Signal input section 410 is mounted on the surface of the other end of printed wiring board 40 in the longitudinal direction (left and right direction). Note that the insulating substrate constituting the printed wiring board 40 is preferably an insulating substrate made of resin, such as a paper-based phenol resin substrate.

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 an edge along the width direction of the bottom plate 420, and an edge along the length direction of the bottom plate 420. It has a pair of second side plates 422A and 422B rising from the edge. That is, the case 42 is formed into a long box shape with an open surface (lower surface) facing the bottom plate 420. The case 42 includes a fixing plate 423 that protrudes outward from the tip of the second side plate 422A, which is one of the pair of second side plates 422A and 422B. The fixed plate 423 is formed into a square gutter shape as shown in FIG. Further, a screw fixing portion 424 is provided at one end (left end) in the longitudinal direction of the bottom plate 420. The screw fixing portion 424 is formed in a bridge shape that projects downward from the bottom plate 211. Further, the screw fixing portion 424 is provided with a screw hole.

The printed wiring board 40 is housed in the case 42 with the back surface facing the bottom plate 420, and is fixed to the case 42 with four claws 4220 cut and raised from the pair of second side plates 422A and 422B (see FIG. 4). . The insertion port of the power input unit 400 projects outside the case 42 through a rectangular window hole provided in the first side plate 421B. Further, a screw 4002 inserted into the hole of the terminal piece 4001 passes through the through hole of the printed wiring board 40, and is screwed into the screw hole of the screw fixing part 424 of the case 42 (see FIG. 9).

As shown in FIG. 2, the power supply device 4 is attached to the upper surface (second surface) of the attachment member 21 of the light source unit 2, with the bottom plate 420 of the case 42 facing upward. Specifically, the case 42 is fixed to the mounting member 21 by screwing the second side plate 422B and the fixing plate 423 to the pair of side plates 212 of the mounting member 21, respectively. When attached to the attachment member 21 , the opening of the case 42 is closed by the bottom plate 211 of the attachment member 21 . Note that a terminal piece 4001 of the power input section 400 is electrically connected to the case 42 via a screw 4002. Therefore, when the light source unit 2 is attached to the instrument main body 10, the ground potential of the power supply circuit 49 becomes equal to the potential of the instrument main body 10 via the case 42 and the mounting member 21 that is electrically connected to the case 42.

As shown in FIG. 5, the connection member 5 includes two conductors 50, two first terminal members 51, and two second terminal members 52. The two conductors 50 are each made of a conductive material such as copper or copper alloy and are formed into a thin rod shape (for example, a cylinder shape). The length of each of these two conductors 50 is preferably about several tens of mm.

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. The first terminal member 51 has a plate member 510 made of a rectangular metal plate, as shown in FIGS. 6A to 6D. Both ends of the plate material 510 along the longitudinal direction X1 are bent and raised in the same direction along the thickness direction X3, so that the plate material 510 is formed into a square gutter shape (see FIG. 6A). As shown in FIG. 6A, the first terminal member 51 has an insertion hole 511 that passes through the center of the plate material 510 (the center in the longitudinal direction X1 and the transverse direction X2). It is preferable that the first terminal member 51 has a plurality of (for example, three) support pieces 512 and a plurality of (for example, three) guide pieces 513. Each of the three support pieces 512 is formed integrally with the plate material 510 by cutting and raising the plate material 510 into a pentagonal shape. The tip portions 5120 of these three support pieces 512 face the insertion holes 511, respectively. Further, the three support pieces 512 are arranged at equal intervals so as to surround the insertion hole 511 (see FIGS. 6A and 6C). Each of the three guide pieces 513 is formed integrally with the plate material 510 by cutting and raising the plate material 510 into a trapezoidal shape. The tips of these three guide pieces 513 face the insertion hole 511, respectively. Further, three guide pieces 513 are arranged 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 be inclined away from the plate 510 along the thickness direction X3 of the plate 510 as they approach the insertion hole 511 ( (See FIGS. 6B and 6D).

These two first terminal members 51 are each electrically connected to two input terminal sections 222 provided on the substrate 221 in a one-to-one correspondence. Each of the two input terminal sections 222 is composed of a land formed on the front surface (lower surface) of the substrate 221 around a second through hole 2210 that penetrates the substrate 221 in the thickness direction (vertical direction). (See Figure 5). The two input terminal sections 222 are each electrically connected to the plurality of LEDs 220 via conductors formed on the front surface (lower surface) of the substrate 221. It is preferable that the two first terminal members 51 correspond one-to-one to the two input terminal parts 222, and that the plate material 510 of each first terminal member 51 is soldered to the corresponding input terminal part 222. . Each first terminal member 51 is electrically connected to the corresponding input terminal section 222 with the three support pieces 512 and the three guide pieces 513 inserted into the second through hole 2210 of the corresponding input terminal section 222. connected (see Figure 9).

The two second terminal members 52 are formed to have the same shape and the same dimensions. Therefore, one second terminal member 52 will be described below. However, in the following description, the vertical, horizontal, and front-back directions of the second terminal member 52 are defined in FIGS. 7 and 8.

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, and a terminal. It has a 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 connection piece 522 is formed into a rectangular plate shape. The connecting 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 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. Note that the first spring piece 520A is curved in a U-shape when viewed from the left and right direction. The second spring piece 520B is formed into a rectangular plate shape and protrudes downward from the lower end of the second main piece 521B. Note that the second spring piece 520B is curved in a U-shape when viewed from the left and 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 bending piece 523 is formed into a narrow rectangular plate shape. The bending piece 523 protrudes from the upper end of the second main piece 521B in a direction toward the first main piece 521A along the front-rear direction. The terminal piece 524 is formed into an elongated rectangular plate shape. The terminal piece 524 projects upward from the tip of the flexible piece 523. The three hooking claws 525 are provided at the center 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 connection piece 522, the bending piece 523, the terminal piece 524 and the three hooking claws 525 are made of metal such as copper or copper alloy. Preferably, the plate is formed integrally by processing.

These two second terminal members 52 are electrically connected to two output terminal sections 405 provided on the printed wiring board 40 of the power supply device 4 in a one-to-one correspondence, respectively. Each of the two output terminal sections 405 is composed of a land. Each land is formed on the back surface (upper 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 piece 524 of each second terminal member 52 is inserted into the through hole 43 of the output terminal part 405 that corresponds one-to-one among the two output terminal parts 405. Then, the terminal piece 524 of each second terminal member 52 is soldered to the output terminal portion 405 on the back surface of the printed wiring board 40. In this way, the two second terminal members 52 are electrically connected to the two output terminal sections 405 provided on the printed wiring board 40 of the power supply device 4 in a one-to-one correspondence.

Here, the two second terminal members 52 are each held by a holder 53 having electrical insulation properties. 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 parts 530 (see FIG. 7). The two housing parts 530 each house a second terminal member 52 that corresponds one-to-one among the two second terminal members 52 (see FIG. 8). Note that the upper surface of each of the two housing portions 530 is open. The terminal piece 524 of each of the two second terminal members 52 protrudes from the opening on the top surface of the holder 53 (see FIG. 8). Two insertion ports 531 are open on the lower surface of the holder 53 (see FIGS. 5 and 8). Each of the two insertion ports 531 is connected to a corresponding one of the two housing parts 530 (see FIG. 8). The inner surfaces of the two insertion ports 531 have sloped surfaces that slope toward the accommodating portion 530. The two second terminal members 52 are each prevented from coming off from the housing part 530 by hooking the tips of the three hooking claws 525 on the inner wall surface of the housing part 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 insertion port 531 ( (See Figure 8).

By the way, the holder 53 has a pair of fixing parts 532, as shown in FIGS. 7 and 8. 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 into each of the two fixing holes 44 provided in the printed wiring board 40 . That is, 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).

Next, the assembly process of the light source unit 2 will be explained. However, each of the two first terminal members 51 is electrically connected to a corresponding input terminal section 222 of the two input terminal sections 222 of the substrate 221 by soldering. Similarly, each of the two second terminal members 52 is electrically connected to a corresponding output terminal section 405 of the two output terminal sections 405 of the printed wiring board 40 by soldering. Further, holders 53 holding two second terminal members 52 are mechanically fixed to the printed wiring board 40.

First, a worker who performs the assembly work attaches the power supply device 4 to the second surface (upper surface) of the mounting member 21 so that the opening surface (lower surface) of the case 42 is covered with the bottom plate 211 of the mounting member 21 . 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 are connected in the thickness direction (up and down) of the printed wiring board 40. They overlap when viewed from the direction).

Subsequently, the operator fixes the LED module 22 to the first surface (lower surface) of the bottom plate 211 of the mounting member 21. At this time, each of the two first terminal members 51 attached to the board 221 of the LED module 22 corresponds to one of the two insertion ports 531 of the holder 53 when viewed from the thickness direction (vertical direction) of the board 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 eliminates the need for a member (for example, a tape coated with adhesive on one side) to close the first through hole 213, and reduces costs by reducing the number of parts and manufacturing process. can be achieved.

Then, the operator 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 (second end 501) of the conductor 50 is pushed into the insertion hole 511 by the lower surfaces (slanted surfaces) of the three support pieces 512 and the three guide pieces 513 that are arranged so as to surround the insertion hole 511. will be guided to. Therefore, the operator can easily insert the conductor 50 into the insertion hole 511. However, each of the three support pieces 512 is bent (elastically deformed) in the direction in which the conductor 50 is inserted (upward) when the tip portion 5120 comes into contact with the conductor 50 .

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

Finally, the operator assembles the cover 23 to the mounting member 21 with the opening side of the mounting member 21 facing upward. At this time, the pair of protrusions 233A provided on the pair of projecting wall portions 233 of the cover 23 are caught on the pair of inclined portions 212A of the 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.

As described above, in the light source unit 2, 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. Configured to complete. Therefore, the light source unit 2 can simplify the manufacturing process (of the light source unit 2) compared to a conventional example such as the light emitting unit described in Patent Document 1.

Further, 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. Further, each of the three support pieces 512 is pushed by (the first end 500 of) the conductor 50 inserted into the insertion hole 511 and is elastically deformed. Further, each of the three support pieces 512 is electrically connected to the conductor 50 at a tip portion 5120 pressed against the first end 500 of the conductor 50. In other words, in the light source unit 2, even if the conductor 50 is tilted with respect to the insertion hole 511 of the plate material 510, the elastic force of the plurality of (for example, three) support pieces 512 allows the tip portions of each of the support pieces 512 to 5120 can be in contact with the conductor 50. As a result, the light source unit 2 can widen the allowable range of positional deviation between the two first terminal members 51 and the two second terminal members 52, which correspond to each other one-to-one. Moreover, the stress applied to the solder joining each of the plate members 510 of the two first terminal members 51 and each of the two input terminal parts 222 is not easily affected by the inclination of the conductor 50. Therefore, compared to a case where the first terminal member 51 and the conductor 50 are fixed by soldering or the like, cracks occur in the solder joining the first terminal member 51 (the plate material 510 thereof) and the input terminal portion 222. Hard to occur.

By the way, the substrate 221 of the LED module 22 expands due to the heat radiated from the LED 220 during lighting and the 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 the linear expansion coefficient of the metal (e.g., zinc steel plate or stainless steel plate) forming the mounting member 21. It is several dozen times larger than the Each of the plurality of grooves 2211 provided in the substrate 221 is configured such that the length along the longitudinal direction of the substrate 221 is larger than the length along the longitudinal direction of the root portion of the hook portion 216. In other words, the substrate 221 can be expanded and contracted in the longitudinal direction with respect to the mounting member 21 by the difference in length between the groove portion 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 larger than the amount of thermal expansion of the mounting member 21, the board 221 is extended in the longitudinal direction with respect to the mounting member 21, so that the hook portion 216 of the mounting member 21 is applied to the board 221. Stress can be reduced.

However, when the board 221 thermally expands and extends in the longitudinal direction with respect to the mounting member 21, the first terminal member 51 fixed to the board 221 and the case 42 are indirectly fixed to the mounting member 21. The relative position of the second terminal member 52 will shift. As described above, the connection member 5 maintains electrical connection via the conductor 50 even if the positions of the two first terminal members 51 and the two second terminal members 52, which correspond to each other one-to-one, deviate to some extent. can be maintained. However, if the amount of expansion (amount of expansion) of the substrate 221 with respect to the mounting member 21 exceeds the allowable range of positional deviation between the first terminal member 51 and the second terminal member 52 in the connection member 5, the Electrical connection may not be maintained.

On the other hand, the printed wiring board 40 of the power supply device 4 also expands due to the heat radiated from the lit LED 220 and the heat radiated from the power supply circuit 49. However, the insulating substrate constituting the printed wiring board 40 and the insulating substrate constituting the substrate 221 are made of similar materials (for example, synthetic resins such as epoxy resin and phenol resin). In other words, there is a difference in linear expansion coefficient between the board 221 made of different materials such as synthetic resin and metal, and the printed wiring board 40 and the mounting member 21. The difference in linear expansion coefficient of printed wiring board 40 is very small.

Further, the amount of expansion (amount of expansion) of both the substrate 221 and the printed wiring board 40 increases as the distance from the fixed position with respect to the respective mounting member 21 increases. Furthermore, if the fixed position of the board 221 and the fixed position of the printed wiring board 40 seen from the connecting member 5 are on different sides in the longitudinal direction of the mounting member 21, the longitudinal direction of the mounting member 21 between the input terminal section 222 and the output terminal section 405 The positional deviation in the direction becomes large.

On the other hand, in the light source unit 2 of this embodiment, the fixed position F1 of the board 221 with respect to the mounting member 21 and the fixed position F2 of the printed wiring board 40 with respect to the mounting member 21 are in the longitudinal direction of the mounting member 21 when viewed from the connecting member 5. (see Figure 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 fixed position F1 and the conductor 50 and the shortest distance Z2 between the fixed position F2 and the conductor 50 is defined as Z3 (=|Z1-Z2|). In the light source unit 2, since the substrate 221 and the printed wiring board 40 expand and contract in the same direction, 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, in the light source unit 2, it is possible to reduce the positional deviation in the longitudinal direction of the mounting member 21 between the input terminal section 222 and the output terminal section 405. As a result, the light source unit 2 can reduce the stress applied to the wiring from the power supply device 4 to the LED module 22 (input terminal section 222, output terminal section 405, and connection member 5).

Next, the construction procedure of the lighting fixture 1 will be explained. First, as shown in FIG. 1, the installer inserts the power line 30 and signal line that have been previously wired under the ceiling into the hole 111A of the fixture body 10, and then connects each hanging bolt 200 exposed on the indoor side to the corresponding through the hole 111B. After that, the builder screws nuts 300 into each hanging bolt 200 to fix the appliance main body 10 to the ceiling 100. Thereafter, the installer connects the power line 30 to the terminal block 25, and further plugs and connects the plug connector 251 of the terminal block 25 to the power input section 400 (see FIG. 4) of the power supply device 4. Subsequently, the builder electrically connects the signal line to the signal input section 410 (see FIG. 4) of the power supply device 4.

Then, the installer hooks the ends of the pair of hook fittings 214 into the pair of insertion holes 112A provided in one side plate 112 of the appliance body 10, and then attaches the pair of hook springs 215 to the other side plate of the appliance body 10. It is hooked on a hook part 1120 provided at 112. Then, when the installer rotates the light source unit 2 using the hook 214 as a fulcrum, the hook spring 215 returns to its original state while being hooked to the hook 1120, and the spring force of the hook spring 215 causes the light source unit 2 to be lifted up. The unit 2 is held in the instrument body 10. The lighting fixture 1 is installed on the ceiling 100 through the steps described above.

Here, in the light source unit 2, the fixed position F1 of the board 221 and the fixed 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. (See Figure 9). In the light source unit 2, an insulating distance between the member for fixing the board 221 (the hook portion 216A) and the member for fixing the printed wiring board 40 (the screw 4002) and the connecting member 5 can be easily secured.

Furthermore, in the light source unit 2, at least a part of the range G1 in which the board 221 is fixed to the mounting member 21 is such that the printed wiring board 40 is attached to the mounting member 21 (see FIG. 10). Note that the range G1 in which the board 221 is fixed to the mounting member 21 is the range where the hook portion 216A faces the lower surface of the board 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 where the head of the screw 4002 is in contact with 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 manner, 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.

Furthermore, in the light source unit 2, the substrate 221 and the printed wiring board 40 are formed of an insulating substrate made of synthetic resin. Therefore, the difference in linear expansion coefficients between the substrate 221 and the printed wiring board 40 becomes smaller, so that 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.

By the way, in the light source unit 2, the connection member 5 includes a conductor 50 formed in a rod shape, a first terminal member 51, and a second terminal member 52. The first terminal member 51 has a plate material that is electrically conductive and provided with an insertion hole 511 that penetrates in the thickness direction. The plate material is electrically connected to the input terminal portion 222 such that the hole passing through the input terminal portion 222 and the insertion hole 511 overlap when viewed from the thickness direction of the substrate 221 . 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 connecting member 5 is configured as described above, the workability of electrically connecting the input terminal portion 222 of the board 221 and the output terminal portion 405 of the printed wiring board 40 using the connecting member 5 is improved. It is possible to improve the

Here, the fixed position F2 (screwed part 424) of the printed wiring board 40 and the position of the output terminal part 405 (terminal piece 524) may be shifted in the short direction (front-back direction) of the mounting member 21 ( (See Figure 11). In other words, the fixed position F2 of the printed wiring board 40 and the position of the output terminal section 405 (terminal piece 524) do not need to be aligned in a straight line along the longitudinal direction of the mounting member 21.

Further, as shown in FIG. 12, a range G1 in which the board 221 is fixed to the mounting member 21 is a region G1 where the input terminal portion 222 (first part) of the board 221 is It does not matter if it overlaps with the first terminal member 51). In the light source unit 2, if the range G1 where the board 221 is fixed to the mounting member 21 overlaps with the input terminal part 222 (first terminal member 51) of the board 221, the input terminal part due to expansion and contraction of the board 221 222 can be suppressed from changing.

As is clear from the embodiments described above, the light source unit (2) according to the first aspect of the present invention includes a solid-state light emitting device (LED 220) and an input terminal electrically connected to the solid-state light emitting device (LED 220). A long substrate (221) having a portion (222) is provided. 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 device (LED 220). The light source unit (2) includes a mounting member (21) to which a board (221) and a power supply device (4) are attached, and a connection member (5) that electrically connects a power supply circuit (49) and an input terminal section (222). Equipped with. The power supply circuit (49) has a printed wiring board (40). The printed wiring board (40) is formed into a long plate shape from the same material as the board (221), and has an output terminal section (405) that outputs the power generated by the power supply circuit (49). ing. The mounting member (21) is formed into an elongated plate shape having a first surface and a second surface which is the back surface of the first surface, the board (221) is attached to the first surface, and the power supply device is attached to the second surface. (4) is attached. 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 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 fixed position (F1) of the board (221) with respect to the mounting member (21) and the fixed position (F2) of the printed wiring board (40) with respect to the mounting member (21) are located at the fixed position (F2) of the printed wiring board (40) with respect to the mounting member (21) ) on the same longitudinal side.

In the light source unit (2) according to the first aspect, since the substrate (221) and the printed wiring board (40) expand and contract in the same direction, the expansion and contraction of the substrate (221) and the printed wiring board (40) It is possible to reduce the displacement in the longitudinal direction of the attachment member (21) between the input terminal section (222) and the output terminal section (405). As a result, the light source unit (2) can reduce the stress applied to the wiring (input terminal section 222, output terminal section 405, and connection member 5) from the power supply device (4) to the solid-state light emitting element (LED 220). .

In the light source unit (2) according to the second aspect, in the first aspect, the fixed position (F1) of the board (221) and the fixed position (F2) of the printed wiring board (40) are fixed to the printed wiring board (40). It is preferable that the connecting member (5) be located on the opposite side with respect to the longitudinal center (center line α1) of the connecting member (5).

In the light source unit (2) according to the second aspect, the insulation between the member for fixing the board (221) (the hook portion 216A) and the member for fixing the printed wiring board (40) (screw 4002) and the connecting member (5) is It becomes easier to maintain distance.

In the light source unit (2) according to the third aspect, in the first or second aspect, at least a part of the range where the substrate (221) is fixed to the attachment member (21) is fixed to the attachment member (21). ) preferably overlaps with the range where the printed wiring board (40) is fixed to the mounting member (21) when viewed from the lateral direction of the mounting member (21).

In the light source unit (2) according to the third aspect, 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 wiring (input terminal section 222, output terminal section 405) Furthermore, the stress applied to the connecting member 5) can be further reduced.

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.

In the light source unit (2) according to the fourth aspect, the difference in linear expansion coefficients 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 board (221) and the printed wiring board (40) is reduced, and the wiring (input terminal section 222, output terminal section 405, and connection member The stress applied to 5) can be further reduced.

In the light source unit (2) according to the fifth aspect, in any one of the first to fourth aspects, the connection member (5) includes a rod-shaped conductor (50) and a first terminal member (51). ) and a second terminal member (52). The first terminal member (51) preferably has a plate material that is electrically conductive and provided with an insertion hole (511) penetrating in the thickness direction. The plate material is electrically connected to the input terminal portion (222) so that the hole passing through the input terminal portion (222) and the insertion hole (511) overlap when viewed from the thickness direction of the board (221). is preferred. The first terminal member (51) is preferably configured to electrically and mechanically connect the first end (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 (501) of the conductor (50) to the output terminal portion (405) through the through hole (213). It is preferable.

In the light source unit (2) according to the fifth aspect, the input terminal portion (222) of the board (221) and the output terminal portion (405) of the printed wiring board (40) are electrically connected by the connecting member (5). Work efficiency can be improved.

A lighting fixture (1) according to a sixth aspect includes a 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).

In the lighting fixture (1) according to the sixth aspect, stress applied to the wiring (input terminal section 222, output terminal section 405, and connection member 5) from the power supply device (4) to the solid-state light emitting element (LED 220) is reduced. be able to.

1 Lighting fixture 2 Light source unit 4 Power supply 5 Connection member 10 Apparatus body 21 Mounting member 40 Printed wiring board 49 Power supply circuit 50 Conductor 51 First terminal member 52 Second terminal member 213 First through hole 216A Hook portion 220 LED ( solid state light emitting device)
221 Board 222 Input terminal section 405 Output terminal section 500 First end section 501 Second end section 511 Insertion hole 2210 Second through hole 4002 Screw F1 Fixed position F2 Fixed position α1 Center line

Claims (6)

a substrate having a solid-state light emitting element;
a printed wiring board that constitutes a power supply circuit that supplies power to the solid-state light emitting element via a terminal member;
A plate-shaped plate having a first surface and a second surface that is the back surface of the first surface, the board is attached to the first surface, and the printed wiring board is disposed on the second surface side. parts and
a conductor that electrically connects the power supply circuit and the substrate;
a holder disposed on the second surface side of the mounting member to guide the conductor;
Equipped with
The printed wiring board, the holder, the mounting member, and the substrate are arranged in order along the conductor,
At least the holder, the mounting member, and the substrate are arranged in order along the direction in which the first surface and the second surface are arranged,
A light source unit, wherein the conductor passes through the holder, the mounting member, and the substrate. The holder faces the second surface of the mounting member and the printed wiring board, and has an insertion port into which the conductor is inserted.
The light source unit according to claim 1, characterized in that: a second terminal member guided by the holder and electrically connected to the conductor;
a first terminal member that electrically and mechanically connects the power supply circuit and the conductor via the second terminal member;
The light source unit according to claim 1 or 2, characterized in that it has: The substrate has an input terminal portion electrically connected to the solid-state light emitting device,
The conductor is electrically connected to the substrate via the input terminal portion,
The light source unit according to any one of claims 1 to 3, characterized in that: 5. The conductor passes through the holder, the mounting member, and the substrate along a direction in which the first surface and the second surface are lined up. The light source unit described in . comprising: the light source unit according to any one of claims 1 to 5; and a fixture body that supports the light source unit;
A lighting fixture characterized by:

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