JP2024010177A - Light source case, light source unit, luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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, a translucent cover 21, and a protective member 3. The translucent cover 21 comprises a bottom part 210 opposed to a lower surface 2201, 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 cover end part 2111 connects an inner peripheral surface and an outer peripheral surface of the peripheral wall part 211, and is opposed to the fitting member 22. 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 having flexibility, and having at least a portion located between the cover end part 2111 and the fitting member 22. At least a portion of the seal 32 of the protective member 3 is inserted into the through hole 2204.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

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

As a conventional example, a lighting fixture described in Patent Document 1 will be exemplified. The lighting fixture described in Patent Document 1 includes a fixture body, a light source unit, a frame, and a translucent panel. The appliance body is formed into a box shape with an open bottom, and is installed so as to be embedded in an opening provided in a ceiling material. 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 appliance body, and is attached to the appliance body with its upper surface in contact with the periphery of the opening in the ceiling material. The panel is held by the frame so as to close the through hole.

Japanese Patent Application Publication No. 2014-232713

If a foreign object enters the space surrounded by the device body (mounting member), frame, and panel (light-transmitting cover), there is a risk that the foreign object will appear as a shadow on the panel due to the irradiation light from the light source.

The present invention has been made in view of the above reasons, and an object of the present invention is to provide a light source casing, a light source unit, and a lighting fixture that can suppress the entry of foreign matter into a space surrounded by a mounting member and a transparent cover. It is about providing.

A light source housing according to one aspect of the present invention includes a mounting member, a transparent cover, and a protection member. The light source module is attached to one side of the attachment member. The light-transmitting cover has a bottom portion facing the one surface, and a peripheral wall portion protruding from the periphery of the bottom portion toward the mounting member, and is attached to the mounting member so as to cover the one surface. The light-transmitting cover has a cover end and a claw. The cover end portion is an end of the peripheral wall portion on the mounting member side, and is a surface that connects an inner peripheral surface and an outer peripheral surface of the peripheral wall portion and faces the mounting member. The claw portion is provided at the end of the cover. The mounting member has a through hole corresponding to the claw portion. The protection member is sandwiched between the cover end portion and the attachment member. The protection member has a seal located at least partially between the cover end and the attachment member. At least a portion of the seal of the protection member passes through the through hole.

A light source unit according to one aspect of the present invention includes the light source casing and a light source module housed in the light source casing. The light source module includes a mounting board attached to the mounting member and a solid-state light source mounted on the mounting board.

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 housing, light source unit, and lighting fixture of the present invention have the effect of suppressing the entry of foreign matter into the space surrounded by the mounting member and the light-transmitting cover.

FIG. 1 is an exploded perspective view of a lighting fixture according to an embodiment of the present invention. FIG. 2 is a front view of the main body of the above lighting fixture. FIG. 3 is an exploded perspective view of the light source unit in the above lighting fixture. FIG. 4 is a partially cutaway front view of the light source unit same as above. FIG. 5 is a plan view of the light source unit same as above. FIG. 6 is a left side view of the light source unit same as above. FIG. 7 is a perspective view of the light source unit same as above with the unit cover removed. FIG. 8A is a partially enlarged plan view of the light source unit same as above, with the light-transmitting cover omitted. FIG. 8B is a cross-sectional view taken along line AA in FIG. 8A. FIG. 9 is a partially enlarged sectional view of the light source unit same as above. FIG. 10 is another partially enlarged sectional view of the light source unit same as the above. FIG. 11 is a perspective view of the lighting fixture with the main body portion omitted. FIG. 12 is a perspective view of the lighting fixture same as above. FIG. 13 is a partially enlarged plan view of the above lighting fixture with the main body portion omitted. FIG. 14A is a partially enlarged sectional view of a light source casing according to a modified example of an embodiment of the present invention, with the light-transmitting cover omitted. FIG. 14B is a partially enlarged sectional view of the light source casing same as above. FIG. 15 is a front view of another type of light source unit in the above lighting fixture. FIG. 16 is a plan view of another type of light source unit same as above. FIG. 17 is a left side view of another type of light source unit same as above. FIG. 18 is a perspective view of another type of light source unit temporarily suspended in the above lighting fixture. FIG. 19 is a perspective view of the same lighting fixture as above, with the main body portion omitted, with another type of light source unit attached.

A 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 this embodiment is a lighting fixture that can be directly attached to construction materials (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 changes can be made according to the design etc. as long as the effects of the present invention can be achieved. That is, the lighting fixture 1 may be a lighting fixture that is directly attached to a construction material other than the ceiling (for example, a wall, etc.) or a recessed lighting fixture that is embedded in a construction material (for example, a ceiling or a wall). good.

As shown in FIG. 1, the lighting fixture 1 of this embodiment includes a light source unit 2 and a fixture body 10 that supports the light source unit 2. However, in the following description, unless otherwise specified, the up-down direction, front-back direction, and left-right direction in FIG. 1 are defined as the up-down direction, front-back direction, and left-right direction of the lighting fixture 1.

The appliance main body 10 has a main body part 11 that is attached to a construction material (ceiling), and a main body cover 12 that is detachably coupled to the main body part 11 and covers the main body part 11. The main body portion 11 is formed of a metal material such as a galvanized steel plate into a shallow box shape with an open bottom surface. Note that the outer shape of the main body portion 11 when viewed from the top and bottom is a square. A circular power supply hole 110 is provided in the center of the bottom surface of the main body portion 11. Further, a signal hole 111 is provided near the power source hole 110. A first terminal block 14 is arranged near the power hole 110 on the bottom surface of the main body 11, and a second terminal block 15 is arranged near the signal hole 111. The first terminal block 14 is electrically connected to a power cable 16 inserted into the power hole 110 (see FIG. 2). Further, the second terminal block 15 is electrically connected to a signal cable 18 inserted through the signal hole 111 (see FIG. 2). Furthermore, a power plug connector 17 is attached to the tip of the power wire 140 drawn out from the first terminal block 14 . Further, a signal line 150 is drawn out from the second terminal block 15.

A plurality of bolt insertion holes 112 are also provided on the bottom surface of the main body portion 11 (see FIG. 1). The plurality of bolt insertion holes 112 are formed in an oval shape with a long 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 on hanging bolts inserted into at least two of the plurality of bolt insertion holes 112 .

Further, four hook springs 13 are provided on the bottom surface of the main body portion 11. Each hook spring 13 is constituted by a torsion coil spring having a coil portion 130 and two arm portions. The longer arm of the two arms is called a first arm 131, and the shorter arm is called a second arm 132. The tip of the first arm portion 131 is bent into a hook shape (see FIG. 1).

Each hook 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 hook 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.

The main body cover 12 is formed of a metal material such as a galvanized steel plate into a frame shape having an opening 120 having a square shape when viewed from above and below. Note that a portion of the main body cover 12 outside the opening 120 (first portion 121) is formed into a conical surface of a square truncated pyramid with the opening 120 as the bottom surface (upper base). Further, the outer part (second part 122) of the first part 121 in the main body cover 12 is formed into a shape of a pyramidal surface of a regular square pyramid with the periphery of the first part 121 as the four sides of the bottom (upper base). There is. 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 described above, which is a combination of two conical surfaces. For example, the main body cover 12 may have a flat plate shape.

As shown in FIG. 1, the main body cover 12 has projecting walls 123 that protrude upward (in the direction toward the main body 11) from each of the four edges of the opening 120. Of the four projecting walls 123, two of the projecting walls 123 facing each other in the front-back direction each have an inverted U-shaped through hole 124 and two hook parts 125 on which the first arm part 131 of the hook spring 13 is hooked. (See Figure 2). Further, among the four projecting walls 123, the projecting wall 123 projecting from the right edge of the opening 120 is provided with an inverted U-shaped through hole. Moreover, among the four protruding walls 123, the protruding wall 123 protruding from the left edge of the opening 120 has a vertical height smaller than the vertical height of the other three protruding walls 123.

The main body cover 12 is connected to the main body 11 by the spring force of each of the hook springs 13 when the first arm portions 131 of the four hook springs 13 of the main body 11 are hooked to the hook portions 125 corresponding to the respective hook springs 13. be combined.

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 transparent cover 21, and a protection member 3. The light source unit 2 further includes a power supply unit 24, a functional unit 25, a unit cover 23, and two attachment springs 26, which are attached to the light source housing 20.

The mounting member 22 has a square mounting plate 220 and four side plates 221 that project downward from each of the four sides of the mounting plate 220. However, it is preferable that the mounting plate 220 and the four side plates 221 are formed integrally by bending a metal plate such as a galvanized steel plate. Each of the four side plates 221 is formed into an elongated trapezoid shape.

The protection member 3 includes a protection sheet 31 and four seals 32 (packing).

The protective sheet 31 is a resin sheet made of, for example, polyethylene terephthalate. The protective sheet 31 has a square shape with approximately 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 light irradiated by the light source module, but it may be of a color other than white, or may be translucent or transparent.

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

Each of the two light source modules 4 includes a mounting board 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 board 41 (see FIGS. 3 and 4). Each LED 42 is, for example, a white LED for illumination that emits white light. These plurality of LEDs 42 are arranged in a grid pattern on the mounting surface of the mounting board 41 and are electrically connected to each other via wiring conductors (copper foil) formed on the mounting surface. The mounting surface of the mounting board 41 is colored white in order to improve the reflection efficiency of the light irradiated by the LED 42. Each light source module 4 is attached to the lower surface 2201 of the attachment plate 220 with screws, with the protective sheet 31 sandwiched between the light source module 4 and the attachment plate 220. Moreover, the two light source modules 4 are attached to the mounting plate 220 so as to be lined up with an interval in the left-right direction.

Further, on the mounting surface of each mounting board 41, a receptacle connector 43 is mounted which is electrically connected to each LED 42 via a wiring conductor. The receptacle connector 43 has an insertion hole formed in the mounting board 41, an insertion hole 311 formed in the protective sheet 31 of the protection member 3, and an insertion hole 2203 formed in the mounting plate 220 (see FIGS. 3 and 7). It is provided so as to penetrate through each in the vertical direction. That is, each receptacle connector 43 is mounted on the mounting board 41 so as to protrude upward from the top surface 2202 of the mounting plate 220 with the mounting board 41 attached to the bottom surface 2201 of the mounting plate 220. A plug connector 2431 of an output cable 2430 connected to an output connector 243 of the power supply unit 24 is connected to each receptacle connector 43 on the upper surface 2202 side of the mounting plate 220.

The transparent cover 21 has a square bottom 210, a peripheral wall 211 rising upward from the periphery of the bottom 210, and four claws 212 provided at a cover end 2111, which is the upper end of the peripheral wall 211. are doing. The four claws are each formed in a hook shape and protrude upward from the center of each side of the frame-shaped cover end 2111. Each claw portion includes a rectangular plate-shaped insertion piece 2121 that protrudes upward from the cover end 2111, and a locking piece 2122 that has a triangular cross-sectional shape and protrudes from one surface of the insertion piece 2121 facing outside of the peripheral wall portion 211. have It is preferable that the bottom portion 210, the peripheral wall portion 211, and the four claw portions 212 are integrally formed of a synthetic resin material having translucency, such as acrylic resin or polycarbonate resin. Further, it is preferable that at least the bottom portion 210 and the peripheral wall portion 211 are configured to have textured surfaces so as to diffuse light. 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.

The translucent cover 21 is attached to the mounting member 22 so that the bottom portion 210 and the cover end 2111 face the lower surface 2201 of the mounting plate 220, and the peripheral wall portion 211 fits inside the side plate 221 of the mounting member 22 (see FIG. 6). ). Here, in the mounting plate 220, one through hole 2204 is provided at a position corresponding to the four claws 212 of the light-transmitting cover 21, that is, at the center of the four sides of the mounting plate 220 in the longitudinal direction. Each claw portion 212 is inserted into the corresponding through hole 2204 from below of the mounting plate 220, and the locking piece 2122 is caught on the edge of the through hole 2204 on the upper surface 2202 of the mounting plate 220 (see FIGS. 5 and 6).

Here, in order to facilitate insertion of the claw portion 212 into the through hole 2204, the protective sheet 31 is provided with a recessed portion 312 so as to expose a portion of the through hole 2204 (see FIGS. 3 and 8A). Furthermore, a plurality of (seven in this embodiment) slits 313 are provided in the protective sheet 31 at locations corresponding to the through holes 2204. The portion corresponding to the through hole 2204 is the portion of the protective sheet 31 that covers the through hole 2204 and the portion around the portion. The plurality of slits 313 are parallel to each other and are formed from one end of the protective sheet 31 (the bottom of the recess 312) toward the opposite end. The plurality of slits 313 form a plurality of rectangular movable pieces 314. Note that among the plurality of movable pieces 314 arranged in one direction (left-right direction in FIG. 8A), the width of the movable pieces 314 at both ends is smaller than the width of the other movable pieces 314.

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

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 the portion of the seal 32 that corresponds to the edge of the claw portion 212 is pierced. Further, the plurality of movable pieces 314 of the protective sheet 31 are bent so as to follow the claw portions 212 and pass through the through holes 2204 (see FIG. 9).

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 accommodates the 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. An input cable 2420 is connected to the input connector 242 via a plug connector 2421. A receptacle connector 2422 is attached to the tip of the input cable 2420 and is configured to be removable from the power plug connector 17 . The input connector 242 is electrically connected to the power line 140 via the input cable 2420, the power cable 16, and the first terminal block 14. The power supply circuit converts AC power input from input connector 242 into DC power, and then outputs the converted DC power from output connector 243 via output cable 2430. DC power is supplied to each LED 42 of each light source module 4 via a plug connector 2431 connected to an output cable 2430 and a receptacle connector 43. Further, the power supply circuit increases or decreases the DC power output from the output connector 243 in accordance with a control signal input from the functional unit 25 to the control connector 244 via the control cable 2440, and increases or decreases the optical output of the light source module 4. It is configured to adjust (dimming) the light. Note that in FIG. 7, illustration of the input cable 2420, output cable 2430, control cable 2440, etc. is omitted.

The printed wiring board 241 has a wiring conductor (copper foil) formed on a component surface of a long rectangular flat insulating substrate. So-called lead components such as an input connector 242, an output connector 243, a control connector 244, a smoothing capacitor, and a choke coil are mounted on the surface of the printed wiring board 241. Then, surface mount components among the electronic components constituting the power supply circuit are mounted on the solder surface of the printed wiring board 241. However, the input connector 242 and the control connector 244 are mounted on one end of the printed wiring board 241 in the longitudinal direction, and the output connector 243 is mounted on the other end of the printed wiring board 241 in the longitudinal direction. As shown in FIGS. 5 to 7, the case 240 is formed of a metal plate into a long box shape. Case 240 accommodates printed wiring board 241 inside with input connector 242, output connector 243, and control connector 244 exposed. The power supply unit 24 is screwed to the front end of the upper surface 2202 of the mounting plate 220 so that the longitudinal direction of the case 240 matches the left-right direction.

The functional unit 25 includes a printed wiring board, a housing 250 that accommodates the printed wiring board, and an input terminal block 251 (see FIG. 5). The input terminal block 251 is electrically connected to the signal line 150 drawn out from the second terminal block 15 . A control circuit is constructed by mounting electronic components on a printed wiring board. Further, a control cable 2440 is pulled out 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 (wireless 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).

The attachment spring 26 is composed of a torsion coil spring having a coil portion 260, two arm portions, and an end portion 263. The longer arm of the two arms is called the first arm 261, and the shorter arm is called the second arm. 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 end of the coil section 260 in the radial direction of the coil section 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 hooking piece 264 is formed in a U-shape when viewed from the front and back direction, and is connected to the tip of the first arm piece 265 at one end in the longitudinal direction, and connected to the tip of the second arm piece 266 at the other end in the longitudinal direction ( (See Figure 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 from the rear end of the second arm piece 266 substantially parallel to the hook piece 264.

As shown in FIG. 5, the unit cover 23 includes a flat portion 230, a curved portion 231, three first attachment portions 232, a second attachment portion 233, a first retaining portion 234, and a second retaining portion. 235. Note that the flat portion 230, the curved portion 231, the three first attachment portions 232, the second attachment portion 233, the first retaining portion 234, and the second retaining portion 235 are made of metal such as a galvanized steel plate. It is made up of a single board. The unit cover 23 is provided to cover the upper surface 2202 of the mounting plate 220 of the mounting member 22.

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

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

The three first attachment parts 232 are provided one each at the front end of the flat part 230 (the upper end in FIG. 5), the right end of the flat part 230 (the left end in FIG. 5), and the rear end of the curved part 231. . The three first attachment parts 232 have almost 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 portion 2321 is formed into a narrow plate shape (see FIG. 5). The first support part 2321 is inserted into the coil part 260 of the attachment spring 26 and can support the coil part 260 so as to be rotatable around the axis of the coil part 260. The second support portion 2322 is formed into a flat plate shape and protrudes downward from the edge of the flat portion 230. The second support portion 2322 has a hole 2323 penetrating in the thickness direction (see FIG. 6). This hole 2323 is formed in a size that allows the terminal portion 263 of the attachment spring 26 to be inserted therethrough. The second support portion 2322 can support the terminal portion 263 inserted into the hole 2323. Of the three first attachment parts 232, the attachment springs 26 are attached to each of the two first attachment parts 232 that face each other in the front-rear direction with the curved part 231 in between.

The second attachment portion 233 is constructed by cutting and raising a portion of the flat portion 230. The second mounting portion 233 is configured to support the functional unit 25 by being hooked onto the housing 250 of the functional unit 25 (see FIGS. 5 to 7).

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 cutting and raising a portion 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 transparent cover 21, and overlaps with a portion of the through hole 2204 through which the claw portion 212 is inserted. In other words, the first retaining portion 234 restricts the movement of the claw portion 212 within the through hole 2204 by blocking the remaining portion of the inserted claw portion 212 in the through hole 2204 provided on the left side of the mounting plate 220. are doing. Thereby, the first retaining portion 234 prevents the claw portion 212 from coming off from the through hole 2204.

The remaining three claw portions 212 are prevented from coming off from the through hole 2204 by three second retaining portions 235 (see FIG. 7). The second retaining portion 235 has a flat plate shape and protrudes downward from the end of the flat portion 230. In the flat portion 230 , a portion of the base end portion of the first support portion 2321 of each first attachment portion 232 overlaps with a portion of the through hole 2204 . The second retaining portion 235 projects in the direction from the end of the portion of the flat portion 230 that overlaps with the through hole 2204 . The second retaining portion 235 restricts the movement of the claw portion 212 within the through hole 2204 by blocking 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 off from the through hole 2204.

The unit cover 23 has a mounting spring 26 attached to each of the two first mounting portions 232 that face each other in the front-rear direction with the curved portion 231 in between, and a functional unit 25 attached to the second mounting portion 233. It is fixed to the mounting plate 220 of the mounting member 22. Here, a plurality of screw fixing parts 226 are provided on the upper surface 2202 of the mounting plate 220 (see FIGS. 6 and 7). Each screw stopper 226 has a truncated conical projection projecting upward from the upper surface 2202 of the mounting plate 220, and a female thread provided on the upper surface of the projection. When the unit cover 23 is placed on the plurality of screw fixing parts 226, a plurality of fixing screws 227, which are individually inserted into the plurality of screw insertion holes provided in the unit cover 23, are inserted into the female threads of the screw fixing parts 226. It is fixed to the mounting member 22 by being screwed in (see FIG. 5). However, a space equal to the height dimension of each screw fastening part 226 is formed between the mounting plate 220 of the mounting member 22 and the flat part 230 of the unit cover 23. Further, a space is formed between the mounting plate 220 of the mounting member 22 and the curved portion 231 of the unit cover 23, which is larger in vertical dimension than the space between the mounting plate 220 and the flat portion 230. In other words, there is a gap greater than the height of the screwed portion 226 between the mounting plate 220 of the mounting member 22 and the unit cover 23 . Various cables such as an input cable 2420, an output cable 2430, and a control cable 2440 are arranged in this gap. Moreover, various connectors such as an input connector 242, an output connector 243, a control connector 244, a plug connector 2421, 2431, 2441, and a receptacle connector 43, 2432 connected to various cables are arranged in this gap. The unit cover 23 has a function of protecting the various cables and various connectors from hanging bolts and the like by covering these various cables and 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 attachment member 22 and the unit cover 23 in order to be connected to the power plug connector 17 (see FIG. 5).

Next, the work of assembling the light source unit 2 will be explained.

First, an operator attaches two mounting boards 41 on which a plurality of LEDs 42 are mounted to the lower surface 2201 of the mounting plate 220 of the mounting member 22 with the protective sheet 31 sandwiched between them and the mounting plate 220.

Subsequently, the operator attaches the light-transmitting cover 21 to the attachment member 22 so as to cover the light source module 4. Specifically, the operator aligns the four claws 212 of the transparent cover 21 with the four through holes 2204 of the mounting plate 220, and pushes the light-transmissive cover 21 into the four claws 212. It is inserted into the through hole 2204. At this time, the seal 32 covering the through hole 2204 is pierced by the claw portion 212 . Then, the movable piece 314 is bent by the claw portion 212, and the movable piece 314 and a part of 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 since the elastic force acting on the bent movable piece 314 to restore it to its original shape, the seal provided on the movable piece 314 32 is pressed against the insertion piece 2121 of the claw portion 212 and comes into close contact with it.

Further, the locking piece 2122 of the claw portion 212 is caught on the edge of the through hole 2204 in the mounting plate 220, so that the claw portion 212 is held in a state inserted into the through hole 2204. In this state, the seal 32 and the protective sheet 31 are sandwiched between the cover end 2111 of the transparent cover 21 and the mounting plate 220, and the seal 32 is elastically deformed and comes into close contact with the cover end 2111 (Fig. 10 reference).

Subsequently, the operator attaches the power supply unit 24 to the upper surface 2202 of the attachment plate 220 of the attachment member 22. Then, the unit cover 23 provided with the functional unit 25 and the attachment spring 26 is attached to the upper surface 2202 of the attachment plate 220. By attaching the unit cover 23 to the attachment plate 220, the claw portion 212 is prevented from coming off from the through hole 2204. In other words, the light-transmitting cover 21 is prevented from coming off from the mounting member 22.

As described above, in the light source housing 20 of this embodiment, the protective sheet 31 and the seal 32, which are the protective member 3, are sandwiched between the cover end 2111 of the transparent cover 21 and the mounting plate 220 of the mounting member 22. It is. This reduces the gap between the cover end 2111 and the mounting plate 220, and prevents foreign matter such as dust and insects from entering the space surrounded by the mounting member 22 and the transparent cover 21. Thereby, the shadow of a foreign object is suppressed from being cast on the transparent cover 21 by the irradiated light from the light source module 4.

Further, in this embodiment, since the seal 32 is made of an elastic member, the seal 32 is elastically deformed to fill the gap between the cover end 2111 and the mounting plate 220, and the mounting member 22 and the light-transmitting Intrusion of foreign matter into the space surrounded by the cover 21 is further suppressed. In this embodiment, since the seal 32 is made of foamed resin, it can be elastically deformed with a relatively weak force. Further, the seal 32 is provided on the transparent cover 21 side with respect to the protective sheet 31. Therefore, the seal 32 can be elastically deformed along the cover end 2111, and the gap between the cover end 2111 and the mounting plate 220 becomes smaller. Furthermore, even if the transparent cover 21 expands or contracts due to heat or the like, the seal 32 will elastically deform following the expansion and contraction of the transparent cover 21, thereby reducing the gap between the cover end 2111 and the mounting plate 220. can be filled.

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 transparent cover 21 is inserted, and the movable piece 314 formed by the slit 313 is inserted into the through hole 2204. It bends to follow the claw portion 212 that has been moved. 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. This allows the seal 32 and the movable piece 314 to close the through hole 2204 through which the claw portion 212 is inserted, and prevents foreign matter from entering the space surrounded by the mounting member 22 and the transparent cover 21 through the through hole 2204. entry is suppressed. In addition, since the protective sheet 31 is provided with a plurality of slits 313, it becomes easy to make the movable piece 314 follow the claw portion 212, and the movable piece 314 is surrounded by the mounting member 22 via the through hole 2204 and the transparent cover 21. Entry of foreign matter into the space is further suppressed. Moreover, the plurality of slits 313 allow the movable piece 314 to follow the claw portion 212 even if the protective sheet 31 and the transparent cover 21 are misaligned with respect to the mounting member 22. Therefore, entry of foreign matter into the space surrounded by the mounting member 22 and the light-transmitting cover 21 through the through hole 2204 is further suppressed.

Furthermore, the protective sheet 31 covers the mounting member 22 except for the insertion hole 2203 through which the receptacle connector 43 of the light source module 4 is inserted and the screw hole through which the mounting board 41 is attached to the mounting member 22. In other words, the protective sheet 31 covers the parts of the mounting member 22 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 2111 and the mounting member 22 and a second portion 3102 located between the mounting board 41 and the mounting member 22. (See Figure 4). In this embodiment, the mounting member 22 has a hole 2205 formed by cutting and cutting for reinforcement, a screw hole 2206 that is not used for mounting the unit cover 23, and a circular through hole in the mounting member 22 at a portion facing the mounting board 41. 2207 is formed. These holes are covered by the second portion 3102 of the protective sheet 31. This prevents foreign objects from entering the space surrounded by the mounting member 22 and the light-transmitting cover 21 through holes provided in the mounting member 22 through which objects do not pass.

Further, during the assembly work of the light source unit 2, the protective sheet 31 on which the seal 32 is provided in advance can be sandwiched between the mounting board 41 and the mounting member 22. Therefore, when assembling the light source unit 2, the work of attaching the seal 32 to a predetermined position is not necessary, and the number of work steps can be reduced. Furthermore, it is easier to provide the seal 32 on the protective sheet 31 than on the attachment member 22 which is heavier than the protective sheet 31 or on the cover end portion 2111 of the translucent cover 21 which has a smaller arrangement space than the protective sheet 31.

Next, the work of installing the lighting fixture 1 on the ceiling will be explained. First, the worker who performs the construction work inserts the power cable 16 and signal cable 18 into the power hole 110 and signal hole 111 of the main body 11, respectively, and then tightens the nut on the hanging bolt inserted into the bolt insertion hole 112. Attach the main body part 11 to the ceiling. Further, 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.

Subsequently, the operator attaches the main body cover 12 to the main body part 11. The operator pulls down the first arm portion 131 of one of the four hooking springs 13 of the main body portion 11 and attaches the first arm portion 131 of one of the four hooking portions 125 of the Hook the tip of the arm portion 131. The operator sequentially hooks the tips of the first arm portions 131 of the remaining three hook springs 13 onto the hook portions 125 corresponding to the respective hook springs 13 one by one. Then, the operator lifts the main body cover 12 upward so as to approach the main body part 11 while hooking the tips of the first arm parts 131 of the four hooking springs 13 to the four hooking parts 125. The first arm portion 131 of each hook spring 13 is displaced (rotated) upward while being hooked on each hook portion 125 . When the lower edge of the main body 11 hits the upper surface of the first part 121 of the main body cover 12, the main body 11 and the main cover 12 are connected by the spring force of the four hook springs 13 hooked on the four hooks 125. The state is maintained.

The appliance main body 10 is attached to the ceiling in the manner described above. Next, a procedure for attaching the light source unit 2 to the instrument body 10 will be explained.

The operator inserts the hook piece 264 of the front mounting spring 26 into the through hole 124 provided in the front projecting wall 123 and hooks the hook piece 264 onto the edge of the through hole 124 to attach the light source unit 2 to the instrument main body 10. hold it temporarily. The operator connects the power supply line 140 of the first terminal block 14 and the signal line 150 of the second terminal block 15 to the power supply unit 24 while temporarily holding the light source unit 2 in the instrument main body 10 . After completing the wiring work, the operator inserts the first arm portion 261 of the rear mounting spring 26 into the through hole 124 provided in the rear projecting wall 123, and then lifts the light source unit 2 and opens the main body cover 12. It is stored in the section 120. When the light source unit 2 is housed in the opening 120, the first arm portion 261 of each attachment spring 26 is caught on the edge of each through hole 124 of the front and rear projecting walls 123 (see FIG. 11). As a result, the light source unit 2 is supported by the instrument main body 10 (main body cover 12) by the spring force of the two attachment springs 26. The construction work of the lighting fixture 1 is completed through the steps described above (see FIGS. 11 to 13).

In the example described above, the seal 32 is made of foamed resin, but is not limited to this, and may be made of other materials such as silicone resin or the same resin material as the protective sheet 31.

Further, in the example described above, the protection member 3 includes the protection sheet 31 and the seal 32, but the invention is not limited to this. A modification of the light source housing 20 will be described with reference to FIGS. 14A and 14B. The light source casing 20 of this modification is different from the above-described protection member 3 in that the protection member 3X includes only the protection sheet 31. The basic configuration of the light source casing 20 of this modification is the same as the light source casing 20 described above, and common components are denoted by the same reference numerals and illustrations and explanations are omitted as appropriate.

The protective sheet 31 is provided with a curved 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 in the mounting member 22, the entire circumference of the edge is separated from the lower surface 2201 of the mounting plate 220 by the curved portion 315. Then, as shown in FIG. 14B, when the transparent cover 21 is attached to the mounting member 22, the cover end 2111 comes into contact with the protective sheet 31, and the curved portion is moved so that the end of the protective sheet 31 approaches the mounting plate 220. 315 is extended. That is, the protective sheet 31 has a curved portion 315 in which the first portion 3101 located between the attachment member 22 and the cover end 2111 of the transparent cover 21 is bent so as to come into contact with the cover end 2111 . The protective sheet 31 has flexibility and elasticity, and the curved portion 315 stretched by the cover end 2111 comes into contact with the cover end 2111 due to the elastic force that attempts to restore it to its original shape. This prevents foreign matter from entering into the space surrounded by the mounting member 22 and the light-transmitting cover 21 through the gap between the cover end 2111 and the mounting plate 220.

Moreover, in the lighting fixture 1 of this embodiment, the light source unit 2 combined with the fixture main body 10 is not limited to the light source unit 2 mentioned above. For example, the light source unit 2X described below can also be combined with the instrument main body 10. Note that the basic configuration of the light source unit 2X is the same as that of the light source unit 2. Therefore, in the following description of the light source unit 2X, components common to those of the light source unit 2 described above are designated by the same reference numerals, and illustration and description thereof will be omitted as appropriate.

As shown in FIGS. 15 to 17, the light source unit 2X has a hook member 27 that partially projects from the left edge of the mounting member 22 to the outside 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 galvanized steel plate.

The flat plate portion 270 is formed into a generally rectangular shape. The wide portion 271 projects downward from one of the four sides of the flat plate portion 270 (the left side in FIG. 15). The length of the wide portion 271 in the longitudinal direction is larger than the length of the flat plate portion 270 along the longitudinal direction of the wide portion 271 . In other words, the wide portion 271 has protrusions 272 at both ends thereof in the longitudinal direction that protrude outside both ends of the flat plate portion 270 in the longitudinal direction.

Approximately half of the hooking member 27 in the transverse direction (left-right direction in FIG. 15) of the flat plate portion 270 is attached to the upper surface of the mounting plate 220 of the mounting member 22. Note that 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). Furthermore, the power supply unit 24 is attached to the remaining half of the flat plate portion 270 in the lateral direction. That is, by being attached to the upper surface of the flat plate portion 270, the power supply unit 24 is made less susceptible to the effects of heat radiated from the light source module 4 during lighting.

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

Next, a procedure for attaching the light source unit 2X to the instrument main body 10 will be explained.

The operator inserts the wide part 271 of the hooking member 27 into the gap between the upper end of the left projecting wall 123 and the bottom surface of the main body 11 through the opening 120, and then The protrusions 272 on both sides of the wide part 271 are hooked onto the protrusions 126 on both ends of the wide part 271. As a result, as shown in FIG. 18, the light source unit 2X is temporarily suspended on the appliance main body 10. The operator performs the work of connecting the power supply line 140 of the first terminal block 14 and the signal line 150 of the second terminal block 15 to the power supply unit 24 while the light source unit 2 is temporarily suspended from the appliance main body 10 . After completing the wiring work, the operator inserts the first arm 261 of the mounting spring 26 into the through hole 124 provided in the right projecting wall 123, lifts the light source unit 2, and inserts it into the opening of the main body cover 12. Keep it within 120. When the light source unit 2 is housed in the opening 120, the first arm 261 of the attachment spring 26 is caught on the edge of the through hole 124. Furthermore, the hook member 27 moves away from the opening 120 and is hooked on the left protruding wall 123 (see FIG. 19). As a result, the light source unit 2X is supported by the instrument main body 10 (main body cover 12) by one attachment spring 26 and the hook member 27. The construction work of the lighting fixture 1 is completed through the steps described above.

In addition, in the example mentioned above, the light source housing 20 and the fixture main body 10 are configured separately, but the invention is not limited to this, and the light source housing 20 and the fixture main body 10 may be configured integrally. good. In this case, the light source unit 2 (2X), which includes a light source housing 20 that is integrated with the fixture body 10 and is attached to the ceiling, and a light source module 4 that is housed in this light source housing 20 functions as a lighting fixture. do.

<Summary>
The light source housing (20) according to the first aspect includes a mounting member (22), a transparent cover (21), and a protection member (3, 3X). The light source module (4) is attached to one surface (lower surface 2201) of the attachment member (22). The light-transmitting cover (21) has a bottom (210) facing the one surface (2201), and a peripheral wall (211) protruding from the periphery of the bottom (210) toward the mounting member (22). ) is attached to the attachment member (22) so as to cover it. The protection member (3, 3X) is sandwiched between the cover end (2111), which is an end of the peripheral wall (211) and faces the mounting member (22), and the mounting member (22). Furthermore, the protection member (3, 3X) includes a protection sheet (31) that is flexible and at least partially located between the cover end (2111) and the attachment member (22).

According to this aspect, the protective sheet (31) reduces the gap between the cover end (2111) and the mounting member (22), and the protective sheet (31) reduces the gap between the cover end (2111) and the mounting member (22). Entry of foreign matter into the space is suppressed. Thereby, the shadow of a foreign object is suppressed from being cast on the transparent cover (21) by the irradiated light from the light source module (4).

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

According to this aspect, when the holes (2205, 2206, 2207) are provided in the mounting member (22) at a portion facing the light source module (4), the holes (2205, 2206, 2207) are covered with the protective sheet. (31) can be covered by the second portion (3102). This prevents foreign matter from entering into the space surrounded by the mounting member (22) and the light-transmitting cover (21) through the holes (2205, 2206, 2207) of the mounting member (22).

In the light source housing (20) according to the third aspect, in the first or second aspect, the light-transmitting cover (21) further includes a claw portion (212) protruding from the cover end (2111). The claw portion (212) passes through a through hole (2204) provided in the attachment member (22) and is hooked onto the edge of the through hole (2204). The protective sheet (31) is provided with slits (313) at locations corresponding to the through holes (2204).

According to this aspect, the protective sheet (31) can be bent to follow the claw portion (212) inserted through the through hole (2204), and the attachment member (22) can be connected to the attachment member (22) through the through hole (2204). Foreign matter is prevented from entering the space surrounded by the light-transmitting cover (21).

In the light source casing (20) according to the fourth aspect, in the third aspect, the protective sheet (31) is provided with a plurality of slits (313) at portions corresponding to the through holes (2204).

According to this aspect, the protective sheet (31) can be easily followed by the claw portion (212), and the space surrounded by the mounting member (22) and the transparent cover (21) via the through hole (2204) can be easily moved. Entry of foreign matter into the area is further suppressed.

In the light source casing (20) according to the fifth aspect, in any of the first to fourth aspects, the protective member (3) further includes a seal (32) provided on the protective sheet (31). The seal (32), together with the protective sheet (31), is sandwiched between the cover end (2111) and the mounting member (22).

According to this aspect, the gap between the cover end (2111) and the mounting member (22) can be made smaller, and the space surrounded by the mounting member (22) and the transparent cover (21) can be further reduced. Entry of foreign matter into the area is further suppressed.

In the light source housing (20) according to the sixth aspect, in the fifth aspect, the seal (32) is provided on the transparent cover (21) side with respect to the protective sheet (31).

According to this aspect, it becomes easier to bring the seal (32) into contact with the cover end (2111), and entry of foreign matter into the space surrounded by the mounting member (22) and the transparent cover (21) is further suppressed. be done.

In the light source casing (20) according to the seventh aspect, in the sixth aspect, the seal (32) is an elastic member that is elastically deformed and comes into close contact with the cover end (2111).

According to this aspect, even if the transparent cover (21) is deformed, the seal (32) is elastically deformed to follow the deformation of the transparent cover (21) and tightly adheres to the cover end (2111). Therefore, entry of foreign matter into the space surrounded by the mounting member (22) and the transparent cover (21) is further suppressed.

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

According to this aspect, a soft seal (32) with relatively high elasticity can be used, and the gap between the cover end (2111) and the mounting member (22) can be made smaller, so that the mounting member ( 22) and the transparent cover (21), the entry of foreign matter into the space is further suppressed.

Note that the configurations according to the second to eighth aspects are not essential to the light source casing (20) and can be omitted as appropriate.

The light source unit (2, 2X) according to the ninth aspect includes the light source casing (20) according to any one of the first to eighth aspects, and the light source module (4) housed in the light source casing (20). , is provided. The light source module (4) includes a mounting board (41) attached to the mounting member (22) and a solid-state light source (LED 42) mounted on the mounting board (41).

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

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

According to this aspect, the mounting member (22) and the light-transmitting cover (21) in the light source housing (20) are provided.
) The entry of foreign matter into the space surrounded by

1 Lighting fixture 10 Fixture main body 20 Light source housing 21 Transparent cover 210 Bottom part 211 Peripheral wall part 2111 Cover end part 212 Claw part 22 Mounting member 2201 Bottom surface (one side)
2204 Through holes 3, 3X Protective member 31 Protective sheet 3101 First portion 3102 Second portion 313 Slit 32 Seal 4 Light source module 41 Mounting board 42 LED (solid light source)

Claims (6)

a mounting member on which the light source module is attached to one side;
a light-transmitting cover that is attached to the mounting member so as to cover the one surface, the cover having a bottom portion facing the one surface, and a peripheral wall portion protruding from the periphery of the bottom portion toward the mounting member;
A protective member;
The transparent cover is
a cover end that is an end of the peripheral wall portion on the mounting member side, which connects the inner peripheral surface and the outer peripheral surface of the peripheral wall portion, and is a surface facing the mounting member;
a claw provided at the end of the cover;
The mounting member has a through hole corresponding to the claw portion,
The protection member is sandwiched between the cover end and the mounting member,
the protection member has a seal at least partially located between the cover end and the attachment member;
At least a portion of the seal of the protection member is inserted through the through hole.
A light source casing characterized by: The light source casing according to claim 1, wherein the seal has a narrow portion corresponding to the through hole. The light source casing according to claim 1 or 2, wherein the seal is an elastic member that is elastically deformed and comes into close contact with the end of the cover. The light source casing according to claim 3, wherein the seal is made of foamed resin. The light source casing according to any one of claims 1 to 4,
a light source module housed in the light source casing;
The light source module includes:
a mounting board attached to the mounting member;
A light source unit comprising: a solid-state light source mounted on the mounting board. The light source unit according to claim 5,
A lighting fixture comprising: a fixture body that supports the light source unit.

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