JP6883756B2 - Light source unit and lighting equipment - Google Patents

Description

The present invention relates to a light source unit and a luminaire, and more particularly to a light source unit having a light source and a luminaire having the light source unit.

As a conventional example, the light source module described in Patent Document 1 will be illustrated. In the conventional example, a long substrate on which a large number of light emitting diodes are mounted, a support formed in a U shape by a metal plate to support the substrate, and a substrate made of a light-transmitting synthetic resin material are formed. It is provided with a cover that is attached to the support so as to cover it.

The support has a first portion formed in a long plate shape and to which a substrate is attached to the lower surface, and a second portion and a third portion protruding upward from both ends along the longitudinal direction of the first portion. ing.

The cover has a long main body portion, a first contact portion and a second contact portion protruding inward from both ends along the longitudinal direction of the main body portion, and a first contact portion protruding upward from the first contact portion. It has an engaging portion and a second engaging portion that projects upward from the second contact portion. The cover is attached to the support so that the first engaging portion engages the second portion and the second engaging portion engages the third portion.

Japanese Unexamined Patent Publication No. 2014-229600

By the way, in the conventional example described in Patent Document 1, a case where an abnormal noise is generated from a portion in contact with the support of the cover due to a large difference in the coefficient of thermal expansion between the metal support and the cover made of synthetic resin. was there. That is, when a cover having a coefficient of thermal expansion larger than that of the support is thermally expanded and contracted, the cover is distorted by the frictional force generated between the support and the cover, and the strain due to the thermal expansion and contraction of the cover is released. Occasionally there is a strange noise.

An object of the present invention is to provide a light source unit and a lighting fixture capable of suppressing the generation of abnormal noise.

The light source unit according to one aspect of the present invention includes a light source, a mounting member that supports the light source, a cover that is mounted on the mounting member, and a sheet member that is interposed between the mounting member and the cover. The light source has a long substrate and a plurality of light emitting elements mounted on the substrate. The mounting member has a long bottom plate that supports the substrate, a pair of side plates that project from both ends along the longitudinal direction of the bottom plate, and a hooked portion provided on the pair of side plates. It has been made form by the first material. The cover has a hooking portion that is hooked on the hooked portion and a contact piece that faces a surface of the bottom plate that supports the substrate, and has a second material having a coefficient of thermal expansion larger than that of the first material. It is formed long by. The sheet member is interposed between the hooked portion and the hooked portion and is in contact with the hooked portion and the hooked portion, and is interposed between the contact piece and the bottom plate to make the contact. It has a second contact portion that contacts the piece and the bottom plate, and a connecting portion that connects the first contact portion and the second contact portion , and is formed on the first surface of the first contact portion and the second contact portion. It is configured to be in contact with the mounting member and to be in contact with the cover at the first contact portion and the second surface of the second contact portion opposite to the first surface. The seat member is further configured so that the coefficient of friction between the first surface and the mounting member and the coefficient of friction between the second surface and the cover are smaller than the friction coefficient between the mounting member and the cover. ing.

The lighting fixture according to one aspect of the present invention includes the light source unit and a fixture main body that supports the light source unit.

The light source unit and the lighting fixture of the present invention have an effect that the generation of abnormal noise can be suppressed.

FIG. 1 is an exploded perspective view of a luminaire according to an embodiment of the present invention. FIG. 2 shows a light source unit according to an embodiment of the present invention, and is a side view seen from the longitudinal direction with a part of the cover omitted. FIG. 3 is a perspective view of the seat member in the same light source unit. FIG. 4 is a side view of the main part of the light source unit as seen from the short side. FIG. 5 is a side view of a main part of the same light source unit with the cover removed.

The light source unit and the luminaire according to the embodiment of the present invention will be described in detail with reference to the drawings. The luminaire of the embodiment described below exemplifies a luminaire attached to the ceiling, but the luminaire of the embodiment may be a luminaire attached to a place other than the ceiling such as a wall. In the following description, unless otherwise specified, the vertical, horizontal, and front-back directions of the light source unit and the luminaire are defined in the directions shown in FIG. 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 technical idea of the present invention is not deviated.

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. The instrument body 10 is fixed to the hanging bolt 200 by the nut 300 and directly attached to the ceiling 100. The light source unit 2 is detachably attached to the fixture body 10.

The instrument body 10 is formed into a flat box shape that is long and has an open upper surface (opposing surface to the ceiling 100) by bending the sheet metal. On the side (lower side) of the fixture body 10 opposite to the ceiling 100, a rectangular recess 11 for accommodating the light source unit 2 is provided over the entire length of the fixture body 10 in the longitudinal direction (left-right direction). Inclined portions 12 are provided on both sides of the recess 11 in the lateral direction (front-back direction) of the instrument body 10. The inclined portion 12 extends from the open end edge of the recess 11 in the lateral direction (front-back direction) of the instrument main body 10 and is inclined upward toward the outside.

The recess 11 has a bottom plate 111 formed in the shape of a long rectangular plate, and a pair of side plates 112 protruding downward from both ends (front end and rear end) along the longitudinal direction of the bottom plate 111. The bottom plate 111 of the recess 11 is provided with a hole 111A for passing the power supply line 30 at substantially the center in the longitudinal direction (left-right direction). Further, the bottom plate 111 is provided with holes 111B for passing the suspension bolts 200 at positions near both ends in the longitudinal direction (left-right direction). Then, the terminal block 25 is attached to the lower surface of the bottom plate 111. The terminal block 25 is electrically connected to the power supply line 30. Three electric wires 250 including a ground wire are pulled out from the terminal block 25. Further, a plug connector 251 is electrically connected to the tips of these three electric wires 250.

As shown in FIGS. 1 and 2, the light source unit 2 includes a plurality of (for example, two) LED (Light Emitting Diode) modules 22, a mounting member 21, a cover 23, a power supply device 4, a seat member 5, and the like.

The plurality of LED modules 22 are arranged side by side in the longitudinal direction (left-right direction). Each LED module 22 has a substrate 221 formed in a rectangular plate shape long in the longitudinal direction (left-right direction) (see FIG. 2). A plurality of light emitting elements (LED220) are mounted on the surface (lower surface) of the substrate 221 along the longitudinal direction (left-right direction) and arranged in a row.

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

The mounting member 21 includes a bottom plate 211 formed in a long rectangular flat plate shape and a pair of side plates 212 formed in a long rectangular flat plate shape and projecting upward from both ends along the left-right direction of the bottom plate 211. Have. In the mounting member 21, it is preferable that the bottom plate 211 and the pair of side plates 212 are integrally formed by bending a metal plate such as a zinc steel plate. Further, at the upper ends of the pair of side plates 212, a substantially cylindrical hooked portion 213 is provided (see FIG. 3).

The bottom plate 211 has a central portion in the front-rear direction recessed upward, and an LED module 22 is arranged in the central portion thereof. The LED module 22 is fixed to the bottom plate 211 by a plurality of fixing pieces cut up from the bottom plate 211.

Further, the mounting member 21 preferably includes a pair of hook fittings 214 and a pair of hook springs 215 (see FIGS. 1 and 2). The pair of hook metal fittings 214 are provided in the vicinity of both left and right ends of the bottom plate 211 so that the tips thereof are formed in a hook shape and the tip portions get over the front side plates 212. These pair of hook metal fittings 214 are hooked in the hook holes 112A provided in the side plate 112 in front of the instrument main body 10 (see FIG. 1). Further, the pair of hook springs 215 are composed of torsion coil springs (see FIG. 2). Each hook spring 215 is provided in the vicinity of both left and right ends at the rear end of the bottom plate 211 (see FIG. 1). One end of these pair of hook springs 215 is hooked on a spring receiving metal fitting 1120 provided on the instrument main body 10 (see FIG. 1). That is, the mounting member 21 is detachably attached to the instrument main body 10 by a pair of hook fittings 214 and a pair of hook springs 215.

The cover 23 is formed in a long box shape in which the upper surface (the surface on the mounting member 21 side) is opened by a light diffusing material (for example, milky white acrylic resin). The cover 23 has a convex lens-shaped curved surface portion 231 so that the amount of protrusion downward increases from both ends to the center in the front-rear direction (width direction) (see FIG. 2).

At both ends of the cover 23 in the front-rear direction, extension portions 232 that overlap with the opening edge of the recess 11 of the fixture body 10 in the vertical direction are provided in a state where the light source unit 2 is attached to the fixture main body 10. (See Fig. 2). Inside the extending portion 232 in the lateral direction (front-back direction) of the cover 23, a protruding wall portion 233 projecting upward is provided over the entire length. A hooking portion 234 protruding inward is provided at the tip of each protruding wall portion 233. A contact piece 235 projecting inward projects near the base of each projecting wall portion 233.

The power supply device 4 has a power supply board and a case 42 for accommodating the power supply board. The power supply board is composed of a printed wiring board formed in the shape of a long rectangular plate. Circuit components (for example, a transformer, a diode, a capacitor, etc.) necessary for lighting the two LED modules 22 are mounted on the power supply board.

As shown in FIG. 2, the case 42 has a bottom plate 420, a pair of first side plates 421 rising from an end edge of the bottom plate 420 along the lateral direction (front-rear direction), and an end edge of the bottom plate 420 along the longitudinal direction. It has a pair of second side plates 422 rising from. That is, the case 42 is formed in a long box shape with an open surface (lower surface) facing the bottom plate 420. The case 42 includes a gutter-shaped fixing plate that projects outward from the tip of one (rear) second side plate 422.

As shown in FIG. 2, the power supply device 4 is mounted on the upper surface of the mounting member 21 of the light source unit 2 so that the bottom plate 420 of the case 42 faces up. Specifically, the case 42 is fixed to the mounting member 21 by screwing the second side plate 422 and the fixing plate to the pair of side plates 212 of the mounting member 21, respectively. In the state of being attached to the attachment member 21, the opening of the case 42 is closed by the bottom plate 211 of the attachment member 21.

As shown in FIG. 3, the sheet member 5 has a first contact portion 50, a second contact portion 51, and a connecting portion 52. The first contact portion 50 is formed in a long semi-cylindrical shape. The second contact portion 51 is formed in the shape of a long rectangular plate. The connecting portion 52 is formed in a rectangular plate shape. One end (upper end) of the connecting portion 52 along the longitudinal direction is connected to one end of the first contact portion 50 along the longitudinal direction. Further, one end of the second contact portion 51 along the longitudinal direction is connected to the other end (lower end) of the connecting portion 52 along the longitudinal direction. That is, the first contact portion 50 and the second contact portion 51 are connected by the connecting portion 52. The first contact portion 50, the second contact portion 51, and the connecting portion 52 are preferably integrally formed of a synthetic resin material. Here, as the material forming the sheet member 5, a material having excellent lubricity and a small friction coefficient, for example, a polyester resin, a polyethylene terephthalate resin, a fluororesin, a polyacetal resin, a polyamide resin, a polytetrafluoroethylene resin, or the like is preferable.

The cover 23 is attached to the attachment member 21. That is, the pair of hooking portions 234 are hooked on the hooked portions 213 of each side plate 212 of the mounting member 21, and each contact piece 235 is in contact with the lower surface of the bottom plate 211 of the mounting member 21, so that the cover 23 is attached to the mounting member. It is attached to 21 (see FIG. 2).

Here, the coefficient of thermal expansion of the synthetic resin material (second material) forming the cover 23 is generally several times to a dozen or more than the coefficient of thermal expansion of the metal material (first material) forming the mounting member 21. It's about twice as big. Moreover, since the cover 23 is formed to be long, the dimensional change along the longitudinal direction of the cover 23 due to thermal expansion and contraction is considerably larger than the dimensional change of the mounting member 21. On the other hand, a frictional force in a direction that hinders thermal expansion and contraction is generated on the contact surface between the cover 23 and the mounting member 21 that thermally expands and contracts. The magnitude of the maximum value (maximum static friction force) of this frictional force depends on the friction coefficient of the surface (contact surface) of the cover 23 and the friction coefficient of the surface (contact surface) of the mounting member 21. Then, until the frictional force generated on the contact surface between the cover 23 and the mounting member 21 exceeds the maximum static frictional force, the cover 23 is not displaced with respect to the mounting member 21, so that the cover 23 is distorted. When the frictional force generated on the contact surface between the cover 23 and the mounting member 21 exceeds the maximum static frictional force, the distortion generated in the cover 23 is released at once. When the distortion of the cover 23 is released, a friction noise (abnormal noise) accompanied by vibration is generated at the contact surface of the cover 23 with the mounting member 21. Such a phenomenon is generally known as a stick-slip phenomenon. Then, it is considered that the abnormal noise due to the stick-slip phenomenon is more likely to occur as the friction coefficient on the contact surface of the two members (mounting member 21 and cover 23) is larger.

Therefore, in the light source unit 2 of the present embodiment, the seat member 5 is interposed between the mounting member 21 and the cover 23, and the friction coefficient on the contact surface between the mounting member 21 and the cover 23 is reduced to suppress the generation of abnormal noise. I'm trying.

That is, the first contact portion 50 of the seat member 5 is interposed between one hook portion 234 of the cover 23 and the hooked portion 213 of the mounting member 21, and is in contact with the hook portion 234 and the hooked portion 213. ing. Further, the second contact portion 51 of the sheet member 5 is interposed between one contact piece 235 of the cover 23 and the bottom plate 211 of the mounting member 21, and is in contact with the contact piece 235 and the bottom plate 211 (FIG. 6). 4). Since the seat member 5 made of a material having excellent lubricity and a small coefficient of friction is interposed, the maximum value of the frictional force (maximum static frictional force) generated on the contact surface between the cover 23 and the mounting member 21 is large. Decrease. As a result, the strain generated in the cover 23 due to the thermal expansion and contraction is also reduced, so that the generation of abnormal noise due to the stick-slip phenomenon can be suppressed.

Here, since the amount of deformation of the cover 23 due to thermal expansion and contraction is proportional to the amount of change in temperature, the temperature change (temperature rise) increases as the portion closer to the power supply device 4 that generates heat (the portion facing the power supply device 4). It is considered that the amount of change in the cover 23 also increases as the size increases. Therefore, it is preferable that the seat member 5 is configured to come into contact with the mounting member 21 at least at a portion of the mounting member 21 facing the power supply device 4. Specifically, it is preferable that the seat member 5 is configured so that at least the connecting portion 52 overlaps with the case 42 of the power supply device 4 when viewed from the front-rear direction (see FIG. 5). With this configuration, it is possible to suppress the generation of abnormal noise while suppressing the cost required for adding the seat member 5. However, the longitudinal dimension of the seat member 5 may be shorter than the longitudinal dimension of the power supply device 4, or larger than the longitudinal dimension of the power supply device 4, for example, the longitudinal dimension of the side plate 212 of the mounting member 21. It may be about the same as the dimension in the direction. Further, the number of seat members 5 is not limited to one. For example, a plurality of sheet members 5 may be interposed between one side plate 212 and the protruding wall portion 233. Alternatively, one or more sheet members 5 may be interposed between both side plates 212 and the protruding wall portion 233, respectively.

By the way, it is considered that the smaller the contact area between the seat member 5 and the cover 23, the less likely it is that the abnormal noise due to the stick-slip phenomenon is generated. Therefore, the light source unit 2 of the present embodiment has one or a plurality of ribs 236 protruding toward the mounting member 21 on the surface of the cover 23 facing the mounting member 21 along the longitudinal direction of the mounting member 21. Is preferable. Specifically, it is preferable that a plurality of ribs 236 are provided on each of the pair of contact pieces 235 and the pair of hooking portions 234 (see FIG. 4). Further, it is preferable that two ribs 236 along the longitudinal direction are provided on the surface (upper surface) of the mounting member 21 of the pair of contact pieces 235 facing the bottom plate 211 so as to be arranged at intervals in the front-rear direction. Further, it is preferable that two ribs 236 along the longitudinal direction are provided on the inner side surface of the pair of hooking portions 234 facing the hooked portion 213 so as to be arranged at intervals in the front-rear direction. Not all of these ribs 236 are in contact with the seat member 5 and the mounting member 21, and the seat member 5 and the mounting member may be affected by the degree of thermal expansion and contraction of the mounting member 21 and the cover 23. The contact situation with 21 changes.

If the cover 23 is configured as described above, the contact piece 235 and the hooking portion 234 come into contact with the first contact portion 50 and the second contact portion 51 of the seat member 5 only at the tip of the rib 236. Therefore, the contact area between the cover 23 and the seat member 5 is reduced as compared with the case where the rib 236 is not provided. As a result, the light source unit 2 can further suppress the generation of abnormal noise due to the stick-slip phenomenon. The number of ribs 236 provided on the contact piece 235 and the hooking portion 234 may be one or three or more. However, if the light source unit 2 is provided with at least the seat member 5, it is possible to suppress the generation of abnormal noise, and the cover 23 does not necessarily have to have the rib 236.

As described above, the light source unit 2 includes a light source (LED module 22), a mounting member 21 that supports the LED module 22, a cover 23 that is mounted on the mounting member 21, and a sheet that is interposed between the mounting member 21 and the cover 23. It includes a member 5. The mounting member 21 is formed in a long shape by the first material (metal material). The cover 23 is formed in a long length by a second material (synthetic resin material) having a coefficient of thermal expansion larger than that of the first material. The seat member 5 is configured so that its first surface contacts the mounting member 21 and its second surface opposite to the first surface contacts the cover 23. The seat member 5 is further configured so that the friction coefficient of at least one of the first surface and the second surface is smaller than the friction coefficient of the mounting member 21 and the cover 23.

Since the light source unit 2 is configured as described above, the coefficient of friction at the contact surface between the mounting member 21 and the cover 23 can be reduced. As a result, the light source unit 2 can suppress the generation of abnormal noise due to the difference in the coefficient of thermal expansion between the first material forming the mounting member 21 and the second material forming the cover 23.

The light source unit 2 preferably includes a power supply device 4 configured to light the LED module 22 with electric power supplied from the outside. The power supply device 4 is preferably attached to the attachment member 21. It is preferable that the seat member 5 is configured to come into contact with the mounting member 21 at least at a portion of the mounting member 21 facing the power supply device 4.

If the light source unit 2 is configured as described above, the seat member 5 is brought into contact with the mounting member 21 at a portion of the cover 23 facing the power supply device 4, which is a portion where the temperature tends to rise, so that the seat member 5 is added. It is possible to suppress the generation of abnormal noise while suppressing the cost required for the above.

In the light source unit 2, the LED module 22 preferably has a long substrate 221 and a plurality of light emitting elements (LED 220) mounted on the substrate 221. The mounting member 21 preferably has a bottom plate 211 that supports the substrate 221 and a pair of side plates 212 that project from both ends along the longitudinal direction of the bottom plate 211, and a hooked portion 213 provided on the pair of side plates 212. The cover 23 preferably has a hooking portion 234 that is hooked on the hooked portion 213 provided on the mounting member 21, and a contact piece 235 that is in contact with the surface (lower surface) of the bottom plate 211 that supports the substrate 221. It is preferable that a part of the sheet member 5 is interposed between the contact piece 235 and the bottom plate 211.

If the light source unit 2 is configured as described above, the friction coefficient at the contact surface between the bottom plate 211 of the mounting member 21 and the cover 23 can be reduced to further suppress the generation of abnormal noise.

In the light source unit 2, the cover 23 preferably has one or a plurality of ribs 236 projecting toward the mounting member 21 on a surface facing the mounting member 21 along the longitudinal direction of the mounting member 21.

If the light source unit 2 is configured as described above, the contact area between the cover 23 and the seat member 5 is reduced as compared with the case where the rib 236 is not provided. As a result, the light source unit 2 can further suppress the generation of abnormal noise.

As described above, the lighting fixture 1 includes a light source unit 2 and a fixture main body 10 that supports the light source unit 2.

Since the lighting fixture 1 is configured as described above, it is possible to suppress the generation of abnormal noise.

1 Lighting equipment 2 Light source unit 4 Power supply 5 Seat member 10 Equipment body 21 Mounting member 22 LED module (light source)
23 Cover 211 Bottom plate 212 Side plate 213 Hooked part 220 LED (light emitting element)
221 Board 234 Hooking part 236 Ribs

Claims (4)

A light source, a mounting member that supports the light source, a cover that is mounted on the mounting member, and a seat member that is interposed between the mounting member and the cover are provided.
The light source has a long substrate and a plurality of light emitting elements mounted on the substrate.
The mounting member has a long bottom plate that supports the substrate, a pair of side plates that project from both ends along the longitudinal direction of the bottom plate, and a hooked portion provided on the pair of side plates. made form by the first material,
The cover has a hooking portion that is hooked on the hooked portion and a contact piece that faces a surface of the bottom plate that supports the substrate, and has a second material having a coefficient of thermal expansion larger than that of the first material. Is formed long by
The sheet member is interposed between the hooked portion and the hooked portion and is in contact with the hooked portion and the hooked portion, and is interposed between the contact piece and the bottom plate to make the contact. It has a second contact portion that contacts the piece and the bottom plate, and a connecting portion that connects the first contact portion and the second contact portion , and is formed on the first surface of the first contact portion and the second contact portion. It is configured to be in contact with the mounting member and to be in contact with the cover at the first contact portion and the second surface of the second contact portion opposite to the first surface.
The seat member is further configured so that the coefficient of friction between the first surface and the mounting member and the coefficient of friction between the second surface and the cover are smaller than the coefficient of friction between the mounting member and the cover. A light source unit characterized by being It is equipped with a power supply device configured to light the light source with electric power supplied from the outside.
The power supply unit is attached to the mounting member and
The light source unit according to claim 1, wherein the seat member is configured to come into contact with the mounting member at least at a portion of the mounting member facing the power supply device. The cover according to claim 1 or 2 , wherein the cover has one or a plurality of ribs protruding toward the mounting member on a surface facing the mounting member along the longitudinal direction of the mounting member. Light source unit. A lighting fixture including the light source unit according to any one of claims 1 to 3 and a fixture main body that supports the light source unit.

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