Light source case, light source unit, luminaire

Abstract

To provide a light source case, a light source unit, and a luminaire that can restrain a foreign body from entering a space surrounded by a fitting member and a translucent cover.SOLUTION: A light source case 20 comprises a fitting member 22 in which a light source module 4 is fitted to a lower surface 2201, a translucent cover 21 fitted to the fitting member 22 so as to cover the light source module 4, and a protective member 3. The protective member 3 is arranged between the lower surface 2201 of the fitting member 22 and the light source module 4. The translucent cover 21 comprises a bottom part 210 opposed to the light source module 4, a peripheral wall part 211 protruding toward the fitting member 22 from a peripheral edge of the bottom part 210, a cover end part 2111, and a claw part 212. The fitting member 22 comprises a through hole 2204 corresponding to the claw part 212. The protective member 3 is sandwiched between the cover end part 2111 and the fitting member 22. The protective member 3 comprises a seal 32 of which at least a portion is located between the cover end part 2111 and the fitting member 22.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention generally relates to a housing for a light source, a light source unit, and a lighting fixture, and more particularly to a housing for a light source capable of accommodating a light source module, a light source unit including the same, and a lighting fixture.

Background Art

[0002] As a conventional example, a lighting fixture described in Patent Document 1 is exemplified. The lighting fixture described in Patent Document 1 includes a fixture body, a light source unit, a frame, and a translucent panel. The fixture body is formed in a box shape with an open bottom surface and is installed in a state of being embedded in an opening provided in a ceiling member. The light source unit is housed inside the fixture body. The frame is provided with a through hole so as to be connected to the opening of the fixture body, and is attached to the fixture body with its upper surface abutting against the peripheral edge of the opening in the ceiling member. The panel is held by the frame so as to close the through hole.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When foreign matter or the like enters the space surrounded by the fixture body (mounting member), the frame, and the panel (translucent cover), there is a possibility that the foreign matter is reflected on the panel as a shadow by the irradiation light of the light source.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a housing for a light source, a light source unit, and a lighting fixture capable of suppressing the entry of foreign matter into the space surrounded by the mounting member and the translucent cover.

Means for Solving the Problems

[0006] A housing for a light source according to an aspect of the present invention includes a mounting member, a translucent cover, and a protection member. The mounting member has a light source module attached to one surface thereof. The translucent cover has a bottom portion facing the light source module and a peripheral wall portion protruding from the bottom portion toward the mounting member, and is attached to the mounting member so as to cover the light source module. The protection member is disposed between the one surface of the mounting member and the light source module. The translucent cover has a cover end portion and a claw portion. The cover end portion is on the light source module side of the peripheral wall portion. The claw portion is provided at the cover end portion. The mounting member has a through hole corresponding to the claw portion. The protection member is sandwiched between the cover end portion and the mounting member. The protection member has a seal at least a part of which is located between the cover end portion and the mounting member. In a plan view from the direction in which the claw portion passes through the through hole, the seal overlaps the through hole.

[0007] A light source unit according to an aspect of the present invention includes the housing for a light source and a light source module housed in the housing for a light source. The light source module has a mounting substrate attached to the mounting member and a solid-state light source mounted on the mounting substrate.

[0008] A lighting fixture according to an aspect of the present invention includes the light source unit and a fixture body that supports the light source unit.

Advantages of the Invention

[0009] In the housing for a light source, the light source unit, and the lighting fixture of the present invention, there is an effect that entry of foreign matter into the space surrounded by the mounting member and the translucent cover can be suppressed.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

DETAILED DESCRIPTION OF THE INVENTION

[0011] The lighting fixture 1 according to an embodiment of the present invention will be described in detail with reference to the drawings. The lighting fixture 1 of the present embodiment is a lighting fixture that can be directly attached to a building material (for example, a ceiling). 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 modifications can be made according to the design and the like as long as the effects of the present invention can be achieved. That is, the lighting fixture 1 may be a lighting fixture directly attached to a building material other than the ceiling (for example, a wall), or an embedded lighting fixture embedded in a building material (for example, a ceiling or a wall).

[0012] As shown in FIG. 1, the lighting fixture 1 of the present embodiment includes a light source unit 2 and a fixture main body 10 that supports the light source unit 2. However, in the following description, unless otherwise specified, the vertical direction, the front-rear direction, and the left-right direction in FIG. 1 are defined as the vertical direction, the front-rear direction, and the left-right direction of the lighting fixture 1.

[0013] The appliance main body 10 has a main body portion 11 attached to the building material (ceiling) and a main body cover 12 detachably coupled to the main body portion 11 to cover the main body portion 11. The main body portion 11 is formed of a metal material such as a zinc steel plate into a shallow box shape with an open bottom surface. Note that the outer shape of the main body portion 11 viewed from the vertical direction is square. A circular power supply hole 110 is provided at the center of the bottom surface of the main body portion 11. Also, a signal hole 111 is provided near the power supply hole 110. A first terminal block 14 is disposed near the power supply hole 110 on the bottom surface of the main body portion 11, and a second terminal block 15 is disposed near the signal hole 111. The first terminal block 14 is electrically connected to a power cable 16 inserted through the power supply hole 110 (see FIG. 2). Also, the second terminal block 15 is electrically connected to a signal cable 18 inserted through the signal hole 111 (see FIG. 2). Further, a power plug connector 17 is attached to the tip of a power supply line 140 drawn from the first terminal block 14. Also, a signal line 150 is drawn from the second terminal block 15.

[0014] A plurality of bolt insertion holes 112 are also provided on the bottom surface of the main body portion 11 (see FIG. 1). These plurality of bolt insertion holes 112 are formed in an oval shape with the direction of the major axis aligned with the front-rear direction of the main body portion 11. The main body portion 11 is attached to the ceiling by tightening nuts to suspension bolts inserted through at least two of these plurality of bolt insertion holes 112.

[0015] Furthermore, four hanging springs 13 are provided on the bottom surface of the main body portion 11. Each hanging spring 13 is composed of a torsion coil spring having a coil portion 130 and two arm portions. The longer one of the two arm portions is called the first arm portion 131, and the shorter one is called the second arm portion 132. The tip of the first arm portion 131 is bent in a hook shape (see FIG. 1).

[0016] Each hanging spring 13 is attached to the main body portion 11 by a metal fitting 133 (see FIG. 1). The metal fitting 133 is configured to support the coil portion 130 of the hanging spring 13 so as to be rotatable around the axis of the coil portion 130 and movable in the axial direction of the coil portion 130.

[0017] The main body cover 12 is formed in a frame shape having an opening 120 with a square shape when viewed from above and below, made of a metal material such as a zinc steel plate. Note that the outer portion (first portion 121) of the opening 120 in the main body cover 12 is formed in a shape that is a frustum surface of a regular square pyramid with the opening 120 as the bottom surface (upper base). Further, the outer portion (second portion 122) of the first portion 121 in the main body cover 12 is formed in a shape that is a frustum surface of a regular square pyramid with the periphery of the first portion 121 as the four sides of the bottom surface (upper base). Note that the lower surfaces of the first portion 121 and the second portion 122 are preferably painted with white paint. However, the shape of the main body cover 12 is not limited to the shape combining the two frustum surfaces as described above. For example, the main body cover 12 may be in a flat plate shape.

[0018] As shown in FIG. 1, the main body cover 12 has projecting walls 123 that project upward (toward the main body portion 11) from each of the four edges of the opening 120. Two reverse U-shaped through holes 124 and two hook portions 125 for hooking the first arm portions 131 of the hook springs 13 are provided on each of the two projecting walls 123 that face each other in the front-rear direction among the four projecting walls 123 (see FIG. 2). Further, a reverse U-shaped through hole is provided in the projecting wall 123 that projects from the right edge of the opening 120 among the four projecting walls 123. Further, the projecting wall 123 that projects from the left edge of the opening 120 among the four projecting walls 123 has a height dimension in the vertical direction that is smaller than the height dimensions in the vertical direction of the other three projecting walls 123.

[0019] The main body cover 12 is coupled to the main body portion 11 by the spring force of each hook spring 13 when the first arm portions 131 of the four hook springs 13 of the main body portion 11 are hooked on the hook portions 125 corresponding to the respective hook springs 13.

[0020] As shown in FIGS. 3 to 7, the light source unit 2 includes two light source modules 4 and a light source housing 20 that houses the two light source modules 4. The light source housing 20 includes a mounting member 22, a translucent cover 21, and a protective member 3. Further, the light source unit 2 further includes a power supply unit 24, a function unit 25, a unit cover 23, and two mounting springs 26 that are attached to the light source housing 20.

[0021] The mounting member 22 has a square mounting plate 220 and four side plates 221 that protrude downward from the four sides of the mounting plate 220, respectively. However, it is preferable that the mounting plate 220 and the four side plates 221 are integrally formed by bending a metal plate such as a zinc steel plate. Each of the four side plates 221 is formed in an elongated trapezoidal shape.

[0022] The protective member 3 has a protective sheet 31 and four seals 32 (packings).

[0023] The protective sheet 31 is a resin sheet made of, for example, polyethylene terephthalate. The protective sheet 31 is square-shaped with substantially the same dimensions as the mounting plate 220 and is attached to the mounting plate 220 so as to cover the lower surface 2201 of the mounting plate 220. The protective sheet 31 has a thickness of, for example, 0.188 [mm] and has flexibility and elasticity. Further, the protective sheet 31 is preferably white in order to improve the reflection efficiency of the irradiation light of the light source module, but may be a color other than white, or translucent or transparent.

[0024] Each of the four seals 32 is an elastic member having elasticity. In the present embodiment, it is made of a foamed resin such as foamed polyethylene. The four seals 32 are each formed in a rectangular parallelepiped shape. The four seals 32 are adhered along each of the four sides of the protective sheet 31 by an adhesive provided between the lower surface 310 of the protective sheet 31. In the present embodiment, the four seals 32 are combined to form a frame shape, but the four seals 32 may be integrally formed.

[0025] Each of the two light source modules 4 includes a mounting substrate 41 and a plurality of LEDs 42 (solid light sources). Each light source module 4 is configured by mounting a plurality of LEDs 42 on the mounting surface (lower surface) of a rectangular mounting substrate 41 (see FIGS. 3 and 4). Each LED 42 is, for example, an illumination white LED that emits white light. These plurality of LEDs 42 are arranged in a grid pattern on the mounting surface of the mounting substrate 41 and are electrically connected to each other via wiring conductors (copper foils) formed on the mounting surface. The mounting surface of the mounting substrate 41 is colored white to improve the reflection efficiency of the irradiation light of the LED 42. Each light source module 4 is attached to the lower surface 2201 of the mounting plate 220 by screwing so as to sandwich a protective sheet 31 between the light source module 4 and the mounting plate 220. Also, the two light source modules 4 are attached to the mounting plate 220 so as to be arranged side by side with a space therebetween in the left - right direction.

[0026] In addition, a receptacle connector 43 electrically connected to each LED 42 via a wiring conductor is mounted on the mounting surface of each mounting substrate 41. The receptacle connector 43 is provided so as to penetrate vertically through an insertion hole formed in the mounting substrate 41, an insertion hole 311 formed in the protective sheet 31 of the protective member 3, and an insertion hole 2203 formed in the mounting plate 220 (see FIGS. 3 and 7). That is, each receptacle connector 43 is mounted on the mounting substrate 41 so as to protrude upward from the upper surface 2202 of the mounting plate 220 in a state where the mounting substrate 41 is attached to the lower surface 2201 of the mounting plate 220. Each receptacle connector 43 has a plug connector 2431 of an output cable 2430 connected to the output connector 243 of the power supply unit 24 connected thereto on the upper surface 2202 side of the mounting plate 220.

[0027] The light-transmitting cover 21 has a square bottom portion 210, a peripheral wall portion 211 that rises upward from the periphery of the bottom portion 210, and four claw portions 212 provided at the cover end portion 2111 that is the upper end portion of the peripheral wall portion 211. The four claw portions are each formed in a hook shape and project upward from the central portion of each side in the frame-shaped cover end portion 2111. Each claw portion has a rectangular plate-shaped insertion piece 2121 that projects upward from the cover end portion 2111 and a locking piece 2122 with a triangular cross-section that projects from one surface of the insertion piece 2121 facing the outside of the peripheral wall portion 211. The bottom portion 210, the peripheral wall portion 211, and the four claw portions 212 are preferably integrally formed of a synthetic resin material having light-transmitting properties such as acrylic resin or polycarbonate resin. Further, at least the bottom portion 210 and the peripheral wall portion 211 are preferably configured to diffuse light by being subjected to embossing on their surfaces. Alternatively, at least the bottom portion 210 and the peripheral wall portion 211 are preferably configured to diffuse light by mixing a diffusing agent into the synthetic resin material.

[0028] The light-transmitting cover 21 is attached to the attachment member 22 such that the bottom portion 210 and the cover end portion 2111 face the lower surface 2201 of the attachment plate 220 and the peripheral wall portion 211 fits inside the side plate 221 of the attachment member 22 (see FIG. 6). Here, in the attachment plate 220, through holes 2204 are provided one by one at positions corresponding to the four claw portions 212 of the light-transmitting cover 21, that is, at the longitudinal centers of the four sides of the attachment plate 220. Each claw portion 212 is inserted from the lower side of the attachment plate 220 into the corresponding through hole 2204, and the locking piece 2122 is hooked on the edge of the through hole 2204 on the upper surface 2202 of the attachment plate 220 (see FIGS. 5 and 6).

[0029] Here, in order to facilitate the insertion of the claw portion 212 into the through-hole 2204, the protective sheet 31 is provided with a recess 312 so as to expose a part of the through-hole 2204 (see FIGS. 3 and 8A). Further, a plurality (seven in this embodiment) of slits 313 are provided at a portion of the protective sheet 31 corresponding to the through-hole 2204. The portion corresponding to the through-hole 2204 is a portion of the protective sheet 31 that covers the through-hole 2204 and its peripheral portions. The plurality of slits 313 are parallel to each other and are formed from one end (the bottom side of the recess 312) to the opposite end of the protective sheet 31. The plurality of slits 313 form a plurality of strip-shaped movable pieces 314. Note that, among the plurality of movable pieces 314 arranged in one direction (the left-right direction in FIG. 8A), the widths of the movable pieces 314 at both ends are smaller than the widths of the other movable pieces 314.

[0030] Further, the seal 32 has a narrow portion 321 with a width smaller than that of other portions along the recess 312 of the protective sheet 31 (see FIG. 3). The seal 32 is not provided with slits, and the narrow portion 321 straddles the plurality of slits 313 and overlaps the plurality of movable pieces 314.

[0031] In order to attach the light-transmitting cover 21 to the attachment member 22, the claw portion 212 of the light-transmitting cover 21 is inserted through the through-hole 2204, whereby a portion hitting the edge of the claw portion 212 in the seal 32 is pierced. Further, the plurality of movable pieces 314 of the protective sheet 31 are bent so as to follow the claw portion 212 and pass through the through-hole 2204 (see FIG. 9).

[0032] The power supply unit 24 includes a power supply circuit configured by mounting electronic components on a printed wiring board 241, and a case 240 that houses this power supply circuit (see FIGS. 5 and 6). The power supply circuit includes an input connector 242 (see FIG. 7), a rectifier, a power factor correction circuit, a step-down DC / DC converter, an output connector 243, a control connector 244 (see FIG. 7), and the like. The input connector 242 has an input cable 2420 connected via a plug connector 2421. A receptacle connector 2422 configured to be detachable from the power plug connector 17 is attached to the tip of the input cable 2420. The input connector 242 is electrically connected to the power supply line 140 via the input cable 2420, the power cable 16, and the first terminal block 14. The power supply circuit converts the AC power input from the input connector 242 into DC power, and then outputs the converted DC power from the output connector 243 via the output cable 2430. The DC power is supplied to each LED 42 of each light source module 4 via a plug connector 2431 connected to the output cable 2430 and a receptacle connector 43. Further, the power supply circuit is configured to increase or decrease the DC power output from the output connector 243 in accordance with a control signal input to the control connector 244 from the functional unit 25 via the control cable 2440, and adjust (dimmer control) the light output of the light source module 4. Note that in FIG. 7, illustration of the input cable 2420, the output cable 2430, the control cable 2440, etc. is omitted.

[0033] The printed wiring board 241 has wiring conductors (copper foils) formed on the component surface of a long rectangular flat insulating substrate. On the surface of the printed wiring board 241, so-called lead components such as an input connector 242, an output connector 243, a control connector 244, smoothing capacitors, and choke coils are mounted. And, surface mount components among the electronic components constituting the power circuit are mounted on the solder side of the printed wiring board 241. However, the input connector 242 and the control connector 244 are mounted at one end in the longitudinal direction of the printed wiring board 241, and the output connector 243 is mounted at the other end in the longitudinal direction of the printed wiring board 241. The case 240 is formed in a long box shape by a metal plate material as shown in FIGS. 5 to 7. The case 240 houses the printed wiring board 241 so as to expose the input connector 242, the output connector 243, and the control connector 244. The power supply unit 24 is screwed to the mounting plate 220 at the front end on the upper surface 2202 of the mounting plate 220 so that the longitudinal direction of the case 240 coincides with the left-right direction.

[0034] The functional unit 25 includes a printed wiring board, a housing 250 that houses the printed wiring board, and an input terminal block 251 (see FIG. 5). The input terminal block 251 is electrically connected to a signal line 150 drawn from the second terminal block 15. Electronic components are mounted on the printed wiring board to form a control circuit. Also, a control cable 2440 is drawn from the functional unit 25. A plug connector 2441 attached to the tip of the control cable 2440 is connected to the control connector 244 of the power supply unit 24. The control circuit is configured to convert, for example, a control signal input to the input terminal block 251 via the signal line 150 into a control signal corresponding to the power supply unit 24. However, the functional unit 25 may be configured to convert a control signal (radio signal) using radio waves as a medium into an electrical signal. The housing 250 is attached to the unit cover 23 (see FIGS. 5 to 7).

[0035] The mounting spring 26 is a torsion coil spring having a coil portion 260, two arm portions, and a terminal portion 263. Of the two arm portions, the longer one is called the first arm portion 261, and the shorter one is called the second arm portion. The first arm portion 261 has a hook piece 264, a first arm piece 265, and a second arm piece 266. The first arm piece 265 protrudes from the terminal of the coil portion 260 in the radial direction of the coil portion 260. However, a plurality of locations (for example, two locations) in the longitudinal direction of the first arm piece 265 are bent in the same direction (downward) (see FIG. 6). The hook piece 264 is formed in a U shape when viewed from the front-rear direction, is connected to the tip of the first arm piece 265 at one end in the longitudinal direction, and is connected to the tip of the second arm piece 266 at the other end in the longitudinal direction (see FIG. 5). The rear end of the second arm piece 266 is connected to the terminal portion 263. However, a plurality of locations (for example, two locations) in the longitudinal direction of the second arm piece 266 are bent in the same direction (downward). The terminal portion 263 protrudes substantially parallel to the hook piece 264 from the rear end of the second arm piece 266.

[0036] As shown in FIG. 5, the unit cover 23 has a flat portion 230, a curved portion 231, three first mounting portions 232, a second mounting portion 233, a first retaining portion 234, and a second retaining portion 235. The flat portion 230, the curved portion 231, the three first mounting portions 232, the second mounting portion 233, the first retaining portion 234, and the second retaining portion 235 are integrally formed of a metal plate such as a zinc steel plate. The unit cover 23 is provided so as to cover the upper surface 2202 of the mounting plate 220 of the mounting member 22.

[0037] The flat portion 230 is formed in a flat plate shape and is along the upper surface 2202 of the mounting plate 220 in the mounting member 22. The curved portion 231 is connected to the rear end (the lower end in FIG. 5) of the flat portion 230.

[0038] The curved portion 231 is curved so as to protrude upward from the rear end of the flat portion 230. However, the front half portion of the curved portion 231 is gently curved as it moves away from the flat portion 230, and the rear half portion of the curved portion 231 is sharply curved downward from the apex of the curved portion 231 (see FIG. 6). ) Further, the curved portion 231 has a rectangular opening 2310. The opening 2310 is formed at a position corresponding to the case 240 of the power supply unit 24 in the curved portion 231, that is, formed so as to expose the case 240. Therefore, the heat generated by the power supply unit 24 can escape to the outside (above) of the curved portion 231 through the opening 2310. Further, in the power supply unit 24, the input connector 242, the output connector 243, and the control connector 244 arranged so as to be exposed from the case 240 are covered by the curved portion 231 of the unit cover 23. Thereby, the input connector 242, the output connector 243, and the control connector 244, which are conductive parts, are protected.

[0039] The three first attachment parts 232 are provided one by one at the front end (the upper end in FIG. 5) of the flat part 230, the right end (the left end in FIG. 5) of the flat part 230, and the rear end of the curved part 231. The three first attachment parts 232 have substantially the same configuration. Each first attachment part 232 has a first support part 2321 and a second support part 2322 (see FIG. 6). The first support part 2321 is formed in a narrow plate shape (see FIG. 5). The first support part 2321 can be inserted into the coil part 260 of the mounting spring 26 and support the coil part 260 so as to be rotatable around the axis of the coil part 260. The second support part 2322 is formed in a flat plate shape and protrudes downward from the edge of the flat part 230. The second support part 2322 has a hole 2323 penetrating in the thickness direction (see FIG. 6). The hole 2323 is formed to have a size into which the terminal part 263 of the mounting spring 26 can be inserted. The second support part 2322 can support the terminal part 263 inserted into the hole 2323. Of the three first attachment parts 232, the mounting springs 26 are attached to each of the two first attachment parts 232 facing each other in the front-rear direction with the curved part 231 interposed therebetween.

[0040] The second attachment part 233 is configured by raising a part of the flat part 230. The second attachment part 233 is configured to support the functional unit 25 by being hooked on the housing 250 of the functional unit 25 (see FIGS. 5 to 7).

[0041] The first retaining portion 234 is provided at the left end (right end in FIG. 5) of the flat portion 230. The first retaining portion 234 is formed by raising a part of the flat portion 230 and protrudes downward. The first retaining portion 234 corresponds to the claw portion 212 on the left side of the light-transmitting cover 21 and overlaps a part of the through-hole 2204 through which the claw portion 212 is inserted. That is, the first retaining portion 234 restricts the movement of the claw portion 212 in the through-hole 2204 by closing the remaining portion of the inserted claw portion 212 in the through-hole 2204 provided on the left side of the mounting plate 220. Thereby, the first retaining portion 234 prevents the claw portion 212 from coming out of the through-hole 2204.

[0042] The remaining three claw portions 212 are prevented from coming out of the through-hole 2204 by three second retaining portions 235 (see FIG. 7). The second retaining portion 235 is formed in a flat plate shape and protrudes downward from the end of the flat portion 230. In the flat portion 230, a part of the base end portion of the first support portion 2321 of each first mounting portion 232 overlaps a part of the through-hole 2204. The second retaining portion 235 protrudes in a direction from the end of the portion overlapping the through-hole 2204 in the flat portion 230. The second retaining portion 235 restricts the movement of the claw portion 212 in the through-hole 2204 by closing the remaining portion of the inserted claw portion 212 in the through-hole 2204. Thereby, the second retaining portion 235 prevents the claw portion 212 from coming out of the through-hole 2204.

[0043] The unit cover 23 has mounting springs 26 attached to respective ones of two first mounting portions 232 that face each other in the front-rear direction with the curved portion 231 therebetween, and is fixed to the mounting plate 220 of the mounting member 22 in a state where the functional unit 25 is attached to the second mounting portion 233. Here, a plurality of screw fastening portions 226 are provided on the upper surface 2202 of the mounting plate 220 (see FIGS. 6 and 7). Each screw fastening portion 226 has a frustum-shaped protrusion protruding upward from the upper surface 2202 of the mounting plate 220 and a female screw provided on the upper surface of the protrusion. The unit cover 23 is fixed to the mounting member 22 by a plurality of fixing screws 227 respectively inserted through a plurality of screw insertion holes provided in the unit cover 23 being screwed into the female screws of the screw fastening portions 226 while being placed on the plurality of screw fastening portions 226 (see FIG. 5). However, a space equal to the height dimension of each screw fastening portion 226 is formed between the mounting plate 220 of the mounting member 22 and the flat portion 230 of the unit cover 23. Also, a space having a vertical dimension larger than the space between the mounting plate 220 and the flat portion 230 is formed between the mounting plate 220 of the mounting member 22 and the curved portion 231 of the unit cover 23. That is, there is a gap of at least the height dimension of the screw fastening portion 226 between the mounting plate 220 of the mounting member 22 and the unit cover 23. Various cables such as the input cable 2420, the output cable 2430, and the control cable 2440 are arranged in this gap. Also, various connectors such as the input connector 242, the output connector 243, the control connector 244, the plug connectors 2421, 2431, 2441, and the receptacle connectors 43, 2432 connected to the various cables are arranged in this gap. The unit cover 23 has a function of protecting the various cables and the various connectors from a suspension bolt or the like by covering these various cables and the various connectors from above. Note that the receptacle connector 2422 attached to the tip of the input cable 2420 is pulled out from the gap between the mounting member 22 and the unit cover 23 because it is connected to the power plug connector 17 (see FIG. 5).

[0044] Next, the operation of assembling the light source unit 2 will be described.

[0045] First, the operator attaches two mounting substrates 41, on which a plurality of LEDs 42 are mounted, to the lower surface 2201 of the mounting plate 220 in the attachment member 22, sandwiching a protective sheet 31 therebetween and the mounting plate 220.

[0046] Subsequently, the operator attaches a light-transmitting cover 21 to the attachment member 22 so as to cover the light source module 4. Specifically, the operator aligns the four claw portions 212 of the light-transmitting cover 21 with the positions of the four through-holes 2204 in the mounting plate 220, and inserts the four claw portions 212 into the four through-holes 2204 by pushing the light-transmitting cover 21. At this time, the seal 32 covering the through-hole 2204 is pierced by the claw portions 212. Then, the movable piece 314 is bent by the claw portions 212, and a part of the movable piece 314 and the seal 32 provided on the movable piece 314 pass through the through-hole 2204 (see FIG. 9). The protective sheet 31 (movable piece 314) has flexibility and elasticity, and an elastic force that tries to restore to its original shape acts on the bent movable piece 314, so that a part of the seal 32 provided on the movable piece 314 is pressed against and adheres to the insertion piece 2121 of the claw portion 212.

[0047] Also, the locking piece 2122 of the claw portion 212 is caught by the edge of the through-hole 2204 in the mounting plate 220, so that the claw portion 212 is held in a state of being inserted into the through-hole 2204. In this state, the seal 32 and the protective sheet 31 are sandwiched between the cover end portion 2111 of the light-transmitting cover 21 and the mounting plate 220, and the seal 32 is in an elastically deformed state and adheres to the cover end portion 2111 (see FIG. 10).

[0048] Subsequently, the operator attaches a power supply unit 24 to the upper surface 2202 of the mounting plate 220 in the attachment member 22. Then, the unit cover 23 provided with the functional unit 25 and the mounting spring 26 is attached to the upper surface 2202 of the mounting plate 220. By attaching the unit cover 23 to the mounting plate 220, it is possible to prevent the claw portion 212 from coming out of the through-hole 2204. That is, it is possible to prevent the light-transmitting cover 21 from coming off the attachment member 22.

[0049] Thus, in the light source housing 20 of this embodiment, a protective sheet 31 and a seal 32, which are protective members 3, are sandwiched between a cover end portion 2111 of the translucent cover 21 and a mounting plate 220 of the mounting member 22. As a result, the gap between the cover end portion 2111 and the mounting plate 220 is reduced, and the entry of foreign matters such as dust and insects into the space surrounded by the mounting member 22 and the translucent cover 21 is suppressed. Thereby, the shadow of foreign matters is suppressed from being reflected on the translucent cover 21 by the irradiation light of the light source module 4.

[0050] Further, in this embodiment, since the seal 32 is formed of an elastic member, the seal 32 elastically deforms to fill the gap between the cover end portion 2111 and the mounting plate 220, and the entry of foreign matters into the space surrounded by the mounting member 22 and the translucent cover 21 is further suppressed. In this embodiment, since the seal 32 is formed of a foamed resin, it can be elastically deformed with a relatively weak force. Further, the seal 32 is provided on the side of the translucent cover 21 with respect to the protective sheet 31. Therefore, the seal 32 can be elastically deformed along the cover end portion 2111, and the gap between the cover end portion 2111 and the mounting plate 220 becomes smaller. Further, even when the translucent cover 21 expands and contracts due to heat or the like, the seal 32 elastically deforms following the expansion and contraction of the translucent cover 21, so that the gap between the cover end portion 2111 and the mounting plate 220 can be filled.

[0051] In addition, the protective sheet 31 is provided with a slit 313 at a portion corresponding to the through hole 2204 through which the claw portion 212 of the light-transmitting cover 21 is inserted. The movable piece 314 formed by this slit 313 bends so as to follow the claw portion 212 inserted into the through hole 2204. Due to the elastic force of the bent movable piece 314, the seal 32 provided on the movable piece 314 is pressed against the claw portion 212. As a result, the through hole 2204 through which the claw portion 212 is inserted can be closed by the seal 32 and the movable piece 314, and the entry of foreign matter into the space surrounded by the attachment member 22 and the light-transmitting cover 21 through the through hole 2204 is suppressed. Further, since a plurality of slits 313 are provided in the protective sheet 31, it becomes easier for the movable piece 314 to follow the claw portion 212, and the entry of foreign matter into the space surrounded by the attachment member 22 and the light-transmitting cover 21 through the through hole 2204 is further suppressed. Also, due to the plurality of slits 313, even when the protective sheet 31 and the light-transmitting cover 21 are displaced with respect to the attachment member 22, the movable piece 314 can be made to follow the claw portion 212. Therefore, the entry of foreign matter into the space surrounded by the attachment member 22 and the light-transmitting cover 21 through the through hole 2204 is further suppressed.

[0052] In addition, the protective sheet 31 covers, in the attachment member 22, portions other than the insertion hole 2203 through which the receptacle connector 43 of the light source module 4 is inserted and the screw holes for attaching the mounting substrate 41 to the attachment member 22. In other words, the protective sheet 31 covers, in the attachment member 22, portions other than the holes through which objects such as connectors and screws need to pass. That is, the protective sheet 31 has a first portion 3101 located between the cover end portion 2111 and the attachment member 22 and a second portion 3102 located between the mounting substrate 41 and the attachment member 22 (see FIG. 4). In the present embodiment, holes 2205 formed by reinforcing cutouts, screw holes 2206 not used for attaching the unit cover 23, and circular through holes 2207 are formed at the opposing portion of the attachment member 22 with the mounting substrate 41. These holes are covered by the second portion 3102 of the protective sheet 31. As a result, the entry of foreign matter into the space surrounded by the attachment member 22 and the light-transmitting cover 21 through the holes in the attachment member 22 through which no objects are passed is suppressed.

[0053] Also, during the assembly work of the light source unit 2, the protective sheet 31 provided with the seal 32 in advance can be sandwiched between the mounting substrate 41 and the mounting member 22. Therefore, during the assembly work of the light source unit 2, the work of attaching the seal 32 to a predetermined position becomes unnecessary, and the man-hours can be reduced. In addition, the protective sheet 31 is easier to provide with the seal 32 than the mounting member 22 that is heavier than the protective sheet 31 or the cover end portion 2111 of the light-transmitting cover 21 that has a smaller arrangement space than the protective sheet 31.

[0054] Next, the work of installing the lighting fixture 1 on the ceiling will be described. First, an operator who performs the installation work inserts the power cable 16 and the signal cable 18 into the power hole 110 and the signal hole 111 of the main body portion 11, respectively, and then attaches the main body portion 11 to the ceiling by tightening a nut on the suspension bolt inserted through the bolt insertion hole 112. In addition, the operator connects the power cable 16 drawn from the power hole 110 to the first terminal block 14, and connects the signal cable 18 drawn from the signal hole 111 to the second terminal block 15.

[0055] Subsequently, the operator attaches the main body cover 12 to the main body portion 11. The operator pulls down the first arm portion 131 of one of the four hook springs 13 of the main body portion 11 and hooks the tip of the first arm portion 131 to the corresponding one of the four hook portions 125. The operator hooks the tips of the first arm portions 131 of the remaining three hook springs 13 to the hook portions 125 corresponding to the respective hook springs 13 one by one in order. Then, the operator lifts the main body cover 12 upward so as to approach the main body portion 11 with the tips of the first arm portions 131 of the four hook springs 13 hooked to the four hook portions 125. The first arm portion 131 of each hook spring 13 is displaced (rotated) upward while remaining hooked to each hook portion 125. When the lower edge of the main body portion 11 hits the upper surface of the first portion 121 of the main body cover 12, the coupling state between the main body portion 11 and the main body cover 12 is maintained by the spring force of the four hook springs 13 hooked to the four hook portions 125.

[0056] The instrument main body 10 is attached to the ceiling by the procedure as described above. Subsequently, the procedure for attaching the light source unit 2 to the instrument main body 10 will be described.

[0057] The operator inserts the hook piece 264 of the front mounting spring 26 into the through hole 124 provided in the front protruding wall 123, and temporarily holds the light source unit 2 on the instrument main body 10 by hooking the hook piece 264 on the edge of the through hole 124. With the light source unit 2 temporarily held on the instrument main body 10, the operator performs the wiring operation between the power line 140 of the first terminal block 14 and the signal line 150 of the second terminal block 15 and the power supply unit 24. After the completion of the wiring operation, the operator inserts the first arm portion 261 of the rear mounting spring 26 into the through hole 124 provided in the rear protruding wall 123, and then lifts the light source unit 2 and stores it in the opening 120 of the main body cover 12. When the light source unit 2 is stored in the opening 120, the first arm portion 261 of each mounting spring 26 is hooked on the edges of the through holes 124 of the front and rear protruding walls 123 (see FIG. 11). As a result, the light source unit 2 is supported on the instrument main body 10 (main body cover 12) by the spring force of the two mounting springs 26. The installation work of the lighting fixture 1 is completed by the procedure as described above (see FIGS. 11 to 13).

[0058] In the above-described example, the seal 32 is made of a foamed resin, but it is not limited thereto, and for example, it may be made of other members such as a silicone resin, a resin material similar to the protective sheet 31, etc.

[0059] Also, in the above-described example, the protective member 3 has a configuration including the protective sheet 31 and the seal 32, but it is not limited thereto. With reference to FIGS. 14A and 14B, a modified example of the light source housing 20 will be described. The light source housing 20 of this modified example is different from the above-described protective member 3 in that the protective member 3X has only the protective sheet 31. The basic configuration of the light source housing 20 of this modified example is common to the above-described light source housing 20, and the same reference numerals are given to the common components, and the illustration and description thereof are omitted as appropriate.

[0060] The protective sheet 31 is provided with a bent portion 315 that is bent in one direction along the entire circumference. As shown in FIG. 14A, when the protective sheet 31 is attached to the lower surface 2201 of the mounting plate 220 of the mounting member 22, the entire circumference of the edge is separated from the lower surface 2201 of the mounting plate 220 due to the bent portion 315. Then, as shown in FIG. 14B, when the light-transmitting cover 21 is attached to the mounting member 22, the cover end portion 2111 contacts the protective sheet 31, and the bent portion 315 is stretched so that the end portion of the protective sheet 31 approaches the mounting plate 220. That is, the protective sheet 31 has a bent portion 315 in which a first portion 3101 located between the mounting member 22 and the cover end portion 2111 of the light-transmitting cover 21 is bent so as to contact the cover end portion 2111. The protective sheet 31 has flexibility and elasticity, and contacts the cover end portion 2111 due to the elastic force with which the bent portion 315 stretched by the cover end portion 2111 attempts to return to its original shape. Thereby, entry of foreign matter into the space surrounded by the mounting member 22 and the light-transmitting cover 21 through the gap between the cover end portion 2111 and the mounting plate 220 is suppressed.

[0061] Further, in the lighting fixture 1 of the present embodiment, the light source unit 2 combined with the fixture main body 10 is not limited to the above-described light source unit 2. For example, a light source unit 2X described below can also be combined with the fixture main body 10. Note that the basic configuration of the light source unit 2X is common to that of the light source unit 2. Therefore, in the following description of the light source unit 2X, the same reference numerals are given to the components common to the above-described light source unit 2, and the illustration and description thereof are omitted as appropriate.

[0062] As shown in FIGS. 15 to 17, the light source unit 2X has a hook member 27 that projects a part out of the mounting member 22 from the left end edge of the mounting member 22. The hook member 27 has a flat plate portion 270 and a wide portion 271. However, the flat plate portion 270 and the wide portion 271 are integrally formed of a metal plate such as a zinc steel plate.

[0063] The flat plate portion 270 is generally formed in a rectangular shape. The wide portion 271 protrudes downward from one of the four sides of the flat plate portion 270 (the left side in FIG. 15). The longitudinal length dimension of the wide portion 271 is larger than the longitudinal length dimension of the flat plate portion 270 along the longitudinal direction of the wide portion 271. That is, the wide portion 271 has protruding portions 272 that protrude outside both ends in the longitudinal direction of the flat plate portion 270 at both ends in its longitudinal direction.

[0064] The engaging member 27 is attached to the upper surface of the mounting plate 220 of the mounting member 22 at approximately half of the portion in the short direction (the left - right direction in FIG. 15) of the flat plate portion 270. The flat plate portion 270 is fixed to the mounting plate 220 so as to be sandwiched between the mounting plate 220 and the flat portion 230 of the unit cover 23 (see FIG. 16). Further, the power supply unit 24 is attached to the remaining half portion in the short direction of the flat plate portion 270. That is, the power supply unit 24 is attached to the upper surface of the flat plate portion 270, making it less likely to be affected by the heat radiated from the light source module 4 during lighting.

[0065] Also, in the light source unit 2X, the mounting spring 26 is attached only to the right - end (the left - end in FIG. 16) of the three first mounting portions 232 of the unit cover 23 (see FIG. 16).

[0066] Next, the procedure for attaching the light source unit 2X to the appliance main body 10 will be described.

[0067] The operator inserts the wide portion 271 of the engaging member 27 into the gap between the upper end of the left protruding wall 123 and the bottom surface of the main body 11 through the opening 120, and then hooks the protruding portions 272 on both sides of the wide portion 271 to the protruding pieces 126 at both ends on both sides of the left protruding wall 123. As a result, as shown in FIG. 18, the light source unit 2X is temporarily suspended on the fixture main body 10. With the light source unit 2 temporarily suspended on the fixture main body 10, the operator performs the wiring operation between the power line 140 of the first terminal block 14 and the signal line 150 of the second terminal block 15 and the power unit 24. After completion of the wiring operation, the operator inserts the first arm portion 261 of the mounting spring 26 into the through hole 124 provided in the right protruding wall 123, and then lifts the light source unit 2 and stores it in the opening 120 of the main body cover 12. When the light source unit 2 is stored in the opening 120, the first arm portion 261 of the mounting spring 26 is caught by the edge of the through hole 124. Further, the engaging member 27 moves in a direction away from the opening 120, and the engaging member 27 is hooked on the left protruding wall 123 (see FIG. 19). As a result, the light source unit 2X is supported by the fixture main body 10 (main body cover 12) by one mounting spring 26 and the engaging member 27. The installation work of the lighting fixture 1 is completed in the above procedure.

[0068] In the above-described example, the light source housing 20 and the fixture main body 10 are configured separately, but the present invention is not limited to this, and the light source housing 20 and the fixture main body 10 may be integrally configured. In this case, a light source unit 2 (2X) including a light source housing 20 integrally configured with the fixture main body 10 and attached to the ceiling and a light source module 4 housed in the light source housing 20 functions as a lighting fixture.

[0069] <Summary> The housing (20) for a light source according to the first aspect includes a mounting member (22), a translucent cover (21), and a protective member (3, 3X). The mounting member (22) has a light source module (4) attached to one surface (the lower surface 2201). The translucent cover (21) has a bottom portion (210) facing the one surface (2201) and a peripheral wall portion (211) protruding from the periphery of the bottom portion (210) toward the mounting member (22), and is attached to the mounting member (22) so as to cover the one surface (2201). The protective member (3, 3X) is sandwiched between a cover end portion (2111) that is an end portion of the peripheral wall portion (211) and faces the mounting member (22) and the mounting member (22). Further, the protective member (3, 3X) has a protective sheet (31) having flexibility and at least a part of which is located between the cover end portion (2111) and the mounting member (22).

[0070] According to this aspect, the protective sheet (31) reduces the gap between the cover end portion (2111) and the mounting member (22), and suppresses the entry of foreign matter into the space surrounded by the mounting member (22) and the translucent cover (21). Thereby, it is suppressed that a shadow of foreign matter is reflected on the translucent cover (21) by the irradiation light of the light source module (4).

[0071] In the housing (20) for a light source according to the second aspect, in the first aspect, the protective sheet (31) has a first portion (3101) and a second portion (3102). The first portion (3101) is located between the mounting member (22) and the cover end portion (2111). The second portion (3102) is located between the mounting member (22) and the light source module (4).

[0072] According to this aspect, in the mounting member (22), when holes (2205, 2206, 2207) are provided in the portion facing the light source module (4), these holes (2205, 2206, 2207) can be covered by the second portion (3102) of the protective sheet (31). Thereby, the entry of foreign matter into the space surrounded by the mounting member (22) and the translucent cover (21) through the holes (2205, 2206, 2207) of the mounting member (22) is suppressed.

[0073] In the housing (20) for a light source according to the third aspect, in the first or second aspect, the translucent cover (21) further has a claw portion (212) protruding from the cover end portion (2111). The claw portion (212) is hooked on the edge of the through hole (2204) through the through hole (2204) provided in the attachment member (22). The protective sheet (31) is provided with a slit (313) at a portion corresponding to the through hole (2204).

[0074] According to this aspect, the protective sheet (31) can be bent so as to follow the claw portion (212) inserted through the through hole (2204), and entry of foreign matter into the space surrounded by the attachment member (22) and the translucent cover (21) through the through hole (2204) is suppressed.

[0075] In the housing (20) for a light source according to the fourth aspect, in the third aspect, a plurality of slits (313) are provided in the protective sheet (31) at a portion corresponding to the through hole (2204).

[0076] According to this aspect, it becomes easier to make the protective sheet (31) follow the claw portion (212), and entry of foreign matter into the space surrounded by the attachment member (22) and the translucent cover (21) through the through hole (2204) is further suppressed.

[0077] In the housing (20) for a light source according to the fifth aspect, in any one of the first to fourth aspects, the protective member (3) further has a seal (32) provided on the protective sheet (31). The seal (32) is sandwiched between the cover end portion (2111) and the attachment member (22) together with the protective sheet (31).

[0078] According to this aspect, the gap between the cover end portion (2111) and the attachment member (22) can be made smaller, and entry of foreign matter into the space surrounded by the attachment member (22) and the translucent cover (21) is further suppressed.

[0079] In the housing (20) for a light source according to the sixth aspect, in the fifth aspect, the seal (32) is provided on the protective sheet (31) on the side of the translucent cover (21).

[0080] According to this aspect, it becomes easier to bring the seal (32) into contact with the cover end portion (2111), and entry of foreign matter into the space surrounded by the attachment member (22) and the translucent cover (21) is further suppressed.

[0081] In the light source housing (20) according to the seventh aspect, in the sixth aspect, the seal (32) is an elastic member having elasticity, and elastically deforms to adhere to the cover end portion (2111).

[0082] According to this aspect, even if the translucent cover (21) is deformed, the seal (32) elastically deforms following the deformation of the translucent cover (21) and adheres to the cover end portion (2111). Therefore, entry of foreign matter into the space surrounded by the attachment member (22) and the translucent cover (21) is further suppressed.

[0083] In the light source housing (20) according to the eighth aspect, in the seventh aspect, the seal (32) is made of a foamed resin.

[0084] According to this aspect, a seal (32) having relatively large stretchability and softness can be used, the gap between the cover end portion (2111) and the attachment member (22) is made smaller, and entry of foreign matter into the space surrounded by the attachment member (22) and the translucent cover (21) is further suppressed.

[0085] Note that the configurations according to the second to eighth aspects are not essential configurations of the light source housing (20) and can be appropriately omitted.

[0086] The light source unit (2, 2X) according to the ninth aspect includes a light source housing (20) according to any one of the first to eighth aspects, and a light source module (4) housed in the light source housing (20). The light source module (4) has a mounting substrate (41) attached to the attachment member (22), and a solid-state light source (LED42) mounted on the mounting substrate (41).

[0087] According to this aspect, entry of foreign matter into the space surrounded by the attachment member (22) and the light-transmitting cover (21) in the light source housing (20) is suppressed.

[0088] The lighting fixture (1) according to the tenth aspect includes the light source unit (2, 2X) of the ninth aspect and a fixture body (10) that supports the light source unit (2, 2X).

[0089] According to this aspect, entry of foreign matter into the space surrounded by the attachment member (22) and the light-transmitting cover (21 ) is suppressed.

Description of Reference Numerals

[0090] 1 Lighting fixture 10 Fixture body 20 Light source housing 21 Light-transmitting cover 210 Bottom 211 Peripheral wall portion 2111 Cover end 212 Claw portion 22 Attachment member 2201 Lower surface (one surface) 2204 Through hole 3, 3X Protection member 31 Protection sheet 3101 First portion 3102 Second portion 313 Slit 32 Seal 4 Light source module 41 Mounting substrate 42 LED (solid light source)

Claims

1. A mounting member to which a light source module is attached to one surface, A bottom portion facing the light source module and a peripheral wall portion protruding from the bottom portion toward the mounting member, and a light-transmitting cover attached to the mounting member so as to cover the light source module, A protective member disposed between the one surface of the mounting fitting and the light source module, The light-transmitting cover, A cover end portion on the light source module side of the peripheral wall portion, And a claw portion provided at the cover end portion, The mounting member has a through hole corresponding to the claw portion, The protective member is sandwiched between the cover end portion and the mounting member, The protective member has a seal at least a part of which is located between the cover end portion and the mounting member, In a plan view from the direction in which the claw portion passes through the through hole, the seal overlaps the through hole, A housing for a light source, characterized in that.

2. The seal has a narrow portion corresponding to the through hole, The housing for a light source according to claim 1, characterized in that.

3. The seal is an elastic member having elasticity and elastically deforms to adhere to the cover end portion, The housing for a light source according to claim 1 or 2, characterized in that.

4. The seal is made of a foamed resin, The housing for a light source according to claim 3, characterized in that.

5. A housing for a light source according to any one of claims 1 to 4, And a light source module housed in the housing for a light source, The light source module, A mounting substrate attached to the mounting member, And a solid light source mounted on the mounting substrate, A light source unit, characterized in that.

6. A light source unit according to claim 5, And an appliance body that supports the light source unit, A lighting fixture, characterized in that.

Images