JP6544895B2 - Lamp and lighting device - Google Patents

Description

The present invention relates to a lamp having a light diffusion unit and a lighting device having the lamp.

  DESCRIPTION OF RELATED ART Conventionally, the lamp | ramp in which the light emission part was provided in the inside of unit main bodies, such as a glass tube, is known (refer patent documents 1-4). Further, Patent Document 4 discloses a lamp in which a light emitting unit (such as an LED light emitting element) is provided on a film substrate.

JP, 2012-99414, A (page 8) JP, 2012-164582, A (page 5) JP, 2012-234730, A (page 6) Utility model registration 3184896 (claim 1)

  However, in the lamps disclosed in Patent Documents 1 to 4, since the light emitting unit is provided inside the unit body such as a glass tube, the heat from the light emitting unit is easily transmitted to the unit body. Therefore, for the purpose of suppressing the operating temperature of the light emitting unit, a base having a heat capacity sufficient to dissipate heat sufficiently through the unit body is provided. Therefore, it is difficult to reduce the size and weight of the lamp. Further, the lamp disclosed in Patent Document 4 uses a thin flexible film substrate having excellent thermal conductivity instead of the base. Therefore, the manufacturing cost is increased, and the mass productivity in the manufacturing process is deteriorated.

The present invention has been made the above problems as the background, while being smaller and lighter, reducing the manufacturing cost, the lamp and the lamp has a light diffusing unit mass productivity is excellent in the manufacturing process Providing a lighting device having

The lamp according to the present invention has the function of diffusing light, and is provided on the outside of the light diffusion unit, and the light diffusion unit including the internal space so that the light enters from the outside to the inside of the light diffusion unit. A light emitting unit, and a case to which the light emitting unit is attached and in which a case opening is formed on the front surface of the light emitting unit , the light diffusion unit is provided on the inner peripheral surface, and the light emitted from the light emitting unit The diffusion film is an aperture that is open at a portion facing the light emitting portion and transmits light emitted from the light emitting portion, and the width of the aperture is the width of the housing opening It is wider than .

  According to the present invention, since the light emitting unit is provided outside the light diffusion unit, the size and weight of the lamp can be reduced, the manufacturing cost can be reduced, and the mass productivity in the manufacturing process can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is an axial sectional view which shows the lamp | ramp 1 which concerns on Embodiment 1 of this invention. It is circumferential direction sectional drawing which shows the lamp | ramp 1 which concerns on Embodiment 1 of this invention. It is an axial sectional view which shows the lamp | ramp 100 in Embodiment 2 of this invention. It is circumferential direction sectional drawing which shows the lamp | ramp 100 in Embodiment 2 of this invention. It is a perspective view which shows the illuminating device 200 which concerns on Embodiment 3 of this invention. It is an axial sectional view showing lighting installation 200 concerning Embodiment 3 of the present invention. It is circumferential direction sectional drawing which shows the illuminating device 200 which concerns on Embodiment 3 of this invention. It is an axial sectional view showing lighting installation 300 concerning Embodiment 4 of the present invention.

  Hereinafter, embodiments of a light diffusion unit, a lamp and a lighting device according to the present invention will be described with reference to the drawings. The present invention is not limited by the embodiments described below. In addition, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

Embodiment 1
FIG. 1 is an axial sectional view showing a lamp 1 according to Embodiment 1 of the present invention, and FIG. 2 is a circumferential sectional view showing the lamp 1 according to Embodiment 1 of the present invention. The lamp 1 will be described based on FIGS. 1 and 2. As shown in FIGS. 1 and 2, the lamp 1 includes a cylindrical light diffusion unit 1a having a function of diffusing light, and a light emitting unit 3 provided outside the light diffusion unit 1a.

  The light diffusion unit 1 a has, for example, a cylindrical unit body 2 made of glass, and a diffusion film 21 provided on the unit body 2. The dimensions of the length, outer diameter, and inner diameter of the unit body 2 are appropriately set according to the specifications of the lighting device. The unit body 2 is detachably attached to the light emitting unit 3.

  The diffusion film 21 is provided on the inner peripheral surface 11 a of the peripheral wall portion 11 of the unit main body 2 and has a function of diffusing light. The diffusion film 21 is, for example, a film having diffusion particles, and is applied so as to have a film thickness of 5.0 μm to 20.0 μm. The diffusion particles contain, for example, one or more of metal oxides, phosphoric acid compounds, fluorides, organic pigments, dyes, and barium sulfate having an average particle diameter of 0.01 μm to 20.0 μm. Among these, the metal oxide contains at least one oxide selected from the group consisting of titanium, silicon, aluminum, zinc, yttrium, lanthanum, magnesium, cerium, bismuth, copper, nickel, gadolinium, zirconium and barium. ing. In addition, the phosphate compound contains at least one compound selected from calcium pyrophosphate and strontium pyrophosphate. Furthermore, the fluoride contains at least one compound selected from magnesium fluoride, cerium fluoride, barium fluoride, strontium fluoride and aluminum fluoride. Furthermore, the organic pigment contains at least one pigment selected from azo pigments and dyed lake pigments. And, the dye contains at least one dye selected from an acid dye and a basic dye.

  The diffusion film 21 may contain an organic component and an inorganic component, or may contain only an inorganic component. For example, a coating liquid in which a diffusing agent made of an oxide is mixed with a liquid resin such as PEO is applied to the inner circumferential surface 11 a of the peripheral wall portion 11 and then fired at a temperature of about 500 ° C. Organic components are removed. Thereby, the diffusion film 21 containing only the inorganic component is formed. The diffusion film 21 may be mixed with light emitting elements such as phosphors or quantum dots. Thereby, the color of light can be adjusted.

  Further, the unit body 2 is not formed with the diffusion film 21 and is opened to form an aperture 22 for transmitting light. The aperture 22 is positioned at an arbitrary position facing the light emitting unit 3 There is. The width T1 of the aperture 22 is appropriately set according to the specifications of the lighting device.

  The unit body 2 is provided with a sealing member 12 which covers both ends and vacuum-seals the internal space. The sealing member 12 closes both ends of the cylindrical unit body 2 and maintains the internal space of the unit body 2 in a vacuum or high vacuum state. The sealing member 12 vacuum-seals both ends of the unit body 2 after the diffusion film 21 is formed on the inner peripheral surface 11 a of the peripheral wall portion 11 of the unit body 2. The degree of vacuum is, for example, 100 Pa or less based on JIS.

  The light emitting unit 3 includes a light emitting unit 4 and a square pillar shaped housing 30 having a hollow portion for housing the light emitting unit 4 and extending in a direction parallel to the longitudinal direction of the unit body 2 (arrow Y direction).

  The light emitting portion 4 extends in a direction (arrow Y direction) parallel to the longitudinal direction of the light emitting unit 3 and is mounted on the substrate 41 attached to the mounting portion 31 using an adhesive member or the like. A plurality of light sources 42 arranged at intervals in a direction parallel to the longitudinal direction (arrow Y direction) and a feed attachment portion 43 for attaching a feed line 44 are provided. The material of the substrate 41 is, for example, glass, glass epoxy, paper phenol, metal such as aluminum, composite, or the like.

  The light source 42 is provided inside the light emitting unit 3, and the light emitting unit 3 is fixed to the peripheral wall portion 11 of the unit main body 2. That is, the light source 42 is disposed close to the outside of the unit body 2. As described above, according to the first embodiment, since the light source 42 is not provided inside the unit body 2, the heat generated from the light source 42 does not stay inside the unit body 2, and the temperature of the unit body 2 rises. Is suppressed. Therefore, the operation reliability of the lamp 1 is improved. In addition, the light emitting unit 4 including the light source 42 is provided in the light emitting unit 3, that is, the light emitting unit 4 is outside the unit body 2 so that light is incident from the outside to the inside of the unit body 2. It is provided.

  For example, a light emitting diode (LED) is used as the light source 42. In this case, the light source 42 may be one in which packaged components are mounted or one in which a chip is directly mounted (COB). The light source 42 is not limited to a light emitting diode, and may be another solid light emitting element such as an organic EL, a laser diode (LD), or the like.

  The feed attachment portion 43 is provided, for example, at one end of the substrate 41 and serves as a solder portion to which the feed line 44 electrically connecting the lighting device (power supply circuit) (not shown) and the substrate 41 is attached. There is. The feed line 44 supplies DC power to the light source 42 from the outside of the lamp 1 to make the light source 42 emit light. The feed attachment portion 43 may be connected to the feed line 44 as welding, an anisotropic conductive film (ACF), a connector or the like other than soldering. In addition, by arranging a lighting device (power supply circuit) on the substrate 41 or the like, the lighting device (power supply circuit) receives the supply of AC power from the outside of the lamp 1, converts the AC power into DC power, If the DC power is supplied, the feed attachment portion 43 can be omitted.

  The housing 30 has a mounting portion 31 to which the light emitting portion 4 is mounted, and a housing reflecting portion 32 that faces the mounting portion 31 and reflects light incident from the light emitting portion 4. The mounting portion 31 is one surface of the housing 30, and the light emitting portion 4 is mounted on the surface facing the housing reflecting portion 32. Moreover, a luminaire main body (not shown) is attached to the surface on the opposite side to the surface on the side of the housing reflection part 32. The mounting portion 31 and the lighting apparatus main body may be attached using a screw or the like, or may be attached using an adhesive member or the like. By attaching the light emitting unit 4 to the attaching unit 31, the operation heat generated by the electronic component or the like in the light emitting unit 4 is efficiently dissipated.

  The housing reflection unit 32 is for reflecting light incident from the light emitting unit 4, and is provided on the other surface of the housing 30 opposite to the mounting unit 31 on one surface. Then, one surface of the housing reflection portion 32 is a contact surface 32 b, and the contact surface 32 b is curved along the outer peripheral surface 11 b of the peripheral wall portion 11 of the unit main body 2, and the peripheral wall portion 11 of the unit main body 2 Is in contact with the outer peripheral surface 11b. The light emitting unit 3 is fixed to the unit body 2. The unit body 2 and the light emitting unit 3 may be fixed using a screw or the like, or may be fixed using an adhesive member or the like.

  A housing opening 32 a is provided at the center of the housing reflection part 32, and the light emitting part 4 is disposed above the housing reflection part 32. Thereby, the light from the light emitting unit 4 is emitted from the light emitting unit 3 through the case opening 32a. The light emitting unit 3 is fixed to the unit body 2 so that the housing opening 32 a and the aperture 22 of the unit body 2 overlap. Thus, the light from the light emitting unit 4 passes through the case opening 32 a and the aperture 22 and is incident on the inside of the unit body 2. The width T2 and the shape of the housing opening 32a are appropriately set according to the specifications of the lighting device. In the first embodiment, the width T1 of the aperture 22 is set to be wider than the width T2 of the case opening 32a (T1> T2). Thereby, it is possible to cope with the spread of light accompanying the progress of the light from the light emitting unit 4.

  The light which does not pass through the case opening 32 a is guided to the diffusion film 21 by the case reflection unit 32. This improves the utilization efficiency of light. In addition, when the light emitting unit 4 is made waterproof or moisture proof, the portion where the inside and the outside of the light emitting unit 3 are connected, such as the housing opening 32a, is sealed using a transparent or highly translucent member You may At that time, if a porous material is used as a transparent or highly translucent member, air permeability can be secured.

  A unit holding portion 17 is provided on the outer peripheral surface 11 b of the peripheral wall portion 11 of the unit main body 2 at a portion other than the portion in contact with the light emitting unit 3. The unit holding portion 17 prevents the unit body 2 from falling from a ceiling or the like. The unit holding portion 17 is provided to hold the two sealing members 12 covering the both end portions of the unit main body 2. Further, at a portion adjacent to the substrate 41 in the unit holding portion 17, a holding wire passing hole 17 a through which the feed line 44 is inserted is provided.

  Next, the operation of the lamp 1 according to the first embodiment will be described. The lamp 1 has a vacuum inside the unit body 2 and does not contact the outside air. Therefore, even if the lamp 1 is used for a long time, the surface of the diffusion film 21 does not deteriorate, and the deterioration does not progress from the surface to the inside. Further, since the lamp 1 has a vacuum inside the unit body 2, the inside of the unit body 2 is isolated from the outside of the unit body 2. Therefore, even if the lamp 1 is used in a high humidity area, moisture does not enter the inside of the unit body 2 and the diffusion film 21 does not absorb moisture. Therefore, while maintaining high light diffusivity, the luminous flux is not reduced, and the graininess of light can be kept good.

  The unit body 2 is detachably attached to the light emitting unit 3. For this reason, when it is going to replace | exchange the unit main body 2, the unit main body 2 can be replaced | exchanged, without being accompanied by replacement | exchange of the light emission part 4 accommodated in the inside of the light emission unit 3. Further, even if the usage environment changes, it is only necessary to remove only the unit body 2 and attach the unit body 2 suitable for the usage environment without removing the light emitting unit 3. In this way, the lamp 1 is more adaptable to changes in the use environment and can be easily replaced.

  Furthermore, in the lamp 1, the light emitting unit 4 is provided outside the unit body 2. Therefore, the distance between the light emitting unit 4 and the surface of the diffusion film 21 is long. Thereby, the diffusivity of light is improved. In addition, since the distance between the light emitting unit 4 and the surface of the diffusion film 21 is long, the diffusivity of light is maintained even if the diameter of the unit body 2 is smaller than when the light emitting unit 4 is accommodated inside the unit body 2 can do. That is, the amount of use of the glass material etc. which comprises the unit main body 2 is reduced, and weight reduction of the lamp | ramp 1 is realizable.

Second Embodiment
Next, the lamp 100 according to the second embodiment will be described. FIG. 3 is an axial sectional view showing the lamp 100 in the second embodiment of the present invention, and FIG. 4 is a circumferential sectional view showing the lamp 100 in the second embodiment of the present invention. The second embodiment is different from the first embodiment in that the sealing member 12 is used as a base 150. In the second embodiment, the same reference numerals as in the first embodiment denote the same parts as in the first embodiment, and a description thereof will be omitted. The differences from the first embodiment will be mainly described.

  As shown in FIG. 3 and FIG. 4, the unit main body 102 has neck portions 113 whose diameters are reduced at both ends, and the neck portion 113 has a neck base 114 bent from the peripheral wall 11 and a neck base 114. And a neck end 115 extending to the end of the unit body 102. The end of the unit body 102 is not limited to the neck foam but may be a straight foam. Further, on the outer peripheral surface 11b of the peripheral wall portion 11 of the unit body 102, two arc-shaped main body reflecting portions 116 are provided which extend in a direction (arrow Y direction) parallel to the longitudinal direction of the unit body 102. When the light emitting unit 3 is attached to the unit main body 102, the main body reflecting portion 116 reflects light from the light emitting portion 4 housed in the light emitting unit 3.

  In the second embodiment, the sealing member 12 covering both end portions of the unit main body 102 is a base 150. The base 150 includes a base housing 151 attached to both ends of the unit body 102, and a base terminal 156 projecting from the base housing 151. The mouthpiece casing 151 includes a casing cylinder 152 fitted to the neck end 115 of the unit main body 102 and a casing lid 153 for closing one end of the casing cylinder 152. The neck end portion 115 of the unit body 102 and the casing cylindrical portion 152 are fitted using the adhesive member 157. Note that the adhesive member 157 may be substituted by an adhesive tape for adhesion, and packing or the like may be added. Further, the case cover 153 is provided with a cover recess 154 which is formed at the periphery and into which the tip end of the neck end 115 is inserted, and a cover projection 155 which is a part other than the cover recess 154. The base terminal 156 is two members protruding from the case lid 153, and is mounted to a socket (not shown) of the lighting device.

  The base 150 has various structures (shapes) such as G13 and GX16 types (based on the standard) used to attach a conventional straight-tube fluorescent lamp or a conventional straight-tube LED lamp to a general lighting fixture. Can be selected as appropriate. Further, in the second embodiment, as in the first embodiment, since the light emitting unit 4 is configured to supply power from the feed line 44, it is not necessary to supply power from the base 150. In this case, no electrical connection is required in the base 150. The light emitting unit 4 may be configured to be supplied with power from the base 150.

  In the second embodiment, since the sealing member 12 is used as the base 150 and the inside of the unit body 102 is maintained in a vacuum state, the same effect as that of the first embodiment can be obtained. Furthermore, since the base 150 is equivalent to that used for a conventional straight tube fluorescent lamp or a conventional straight tube LED lamp, the lamp 100 can be attached to a conventional lighting fixture. Thus, the lamp 100 is highly versatile and can be easily replaced.

Third Embodiment
Next, a lighting device 200 according to the third embodiment will be described. FIG. 5 is a perspective view showing a lighting apparatus 200 according to Embodiment 3 of the present invention, and FIG. 6 is an axial sectional view showing the lighting apparatus 200 according to Embodiment 3 of the present invention. FIG. 7 is a circumferential sectional view showing a lighting apparatus 200 according to Embodiment 3 of the present invention. A lighting device 200 according to the third embodiment has the lamp 100 according to the second embodiment attached to a lighting device main body 205. In the third embodiment, parts common to the first and second embodiments are assigned the same reference numerals and explanations thereof will be omitted, and differences from the first and second embodiments will be mainly described.

  In the third embodiment, as shown in FIG. 5, FIG. 6, and FIG. 7, the lighting device 200 includes the lighting device main body 205, the lighting device 206, the socket 207, and the lamp 100. The lighting fixture body 205 is a rectangular parallelepiped box extending in a direction parallel to the longitudinal direction of the unit body 102 of the lamp 100 (arrow Y direction), and is attached to a ceiling or the like. In a portion adjacent to the substrate 41 in the luminaire main body 205, an instrument through hole 205a through which the feed line 44 is inserted is provided.

  The lighting device 206 is a rectangular parallelepiped box housing a lighting circuit (power supply circuit) for supplying power to the light emitting unit 4 and lighting the light source 42, and is housed inside the lighting device main body 205. A lighting circuit (power supply circuit) is disposed on the substrate 41 of the light emitting unit 4, and the lighting device 206 (power supply circuit) receives the supply of AC power from the outside of the lamp 100 and converts the AC power into DC power. The light source 42 may be configured to be supplied with DC power.

  The socket 207 is a semi-cylindrical member that protrudes from both ends of the lighting device main body 205, and a cap 150 provided at each end of the lamp 100 is attached. The socket 207 corresponds to the base 150 of various structures (shapes) such as G13 and GX16 types (based on the standard) used for attaching to the lighting fixture.

  The lamp 100 is obtained by attaching the light emitting unit 203 to the unit body 102 in the second embodiment. The light emitting unit 203 in the third embodiment is different in shape from the first embodiment. The light emitting unit 203 is a quadrangular prism-like member having a hollow portion and extending in a direction parallel to the longitudinal direction of the unit body 102 (arrow Y direction), and the light emitting unit 4 is housed inside. One surface of the light emitting unit 203 facing the unit body 102 is the facing portion 33 and is not fixed to the unit body 102.

  Further, in the light emitting unit 203, one surface facing the facing portion 33 is a mounting portion 31 to which the light emitting portion 4 is attached. Moreover, the lighting fixture main body 205 is attached to the other surface of the attachment portion 31. The mounting portion 31 and the lighting fixture body 205 may be mounted using a screw or the like, or may be mounted using an adhesive member or the like. The configuration of the light emitting unit 203 other than the facing portion 33 is the same as that of the first embodiment. The light source 42 is supplied with power from the power supply line 44 inserted into the instrument line hole 205 a and emits light.

  The main body reflection portion 116 provided on the outer peripheral surface 11 b of the peripheral wall portion 11 of the unit main body 102 reflects light emitted from the light emission portion 4 as in the case of the housing reflection portion 32 in the first embodiment. Then, the main body reflection portion 116 reflects light not passing through the housing opening 32 a toward the diffusion film 21 and guides the light. This improves the utilization efficiency of light. The light emitting unit 203 may be integrally formed with the lighting device body 205. In this case, when the lamp 100 is attached to the luminaire body 205, the lamp 100 is attached to the luminaire body 205 so that the aperture 22 in the lamp 100 and a portion (not shown) corresponding to the housing opening 32a overlap. Is attached.

  In the third embodiment, the socket 207 corresponds to the base 150 of various structures (shapes) such as G13 and GX16 types (based on the standard) used for attaching to a general lighting fixture. The base 150 of the lamp 100 is a variety of types such as G13 and GX16 types (based on standards) used to attach a conventional straight-tube fluorescent lamp or a conventional straight-tube LED lamp to a general lighting fixture. It is appropriately selected from the structure (shape). Thus, the lamp 100 can be attached to a conventional luminaire. Thus, the lamp 100 is highly versatile and can be easily replaced.

Fourth Embodiment
Next, a lighting apparatus 300 according to the fourth embodiment will be described. FIG. 8 is an axial sectional view showing a lighting apparatus 300 according to Embodiment 4 of the present invention. The fourth embodiment is different from the third embodiment in that the light emitting unit 303 and the socket 307 are integrally formed. In the fourth embodiment, parts common to the first, second, and third embodiments are assigned the same reference numerals and explanations thereof will be omitted, and differences from the first, second, and third embodiments will be mainly described.

  As shown in FIG. 8, in the fourth embodiment, the light emitting unit 303 and the socket 307 are integrally formed. As a result, effects such as improvement of manufacturing efficiency, reduction of manufacturing cost, and improvement of installation efficiency of the lighting apparatus 300 are achieved.

  The lighting apparatus 200 according to Embodiment 3 and the lighting apparatus 300 according to Embodiment 4 use the lamp 100 according to Embodiment 2, but the lamp 1 according to Embodiment 1 may be used.

  DESCRIPTION OF SYMBOLS 1 lamp, 1a light diffusion unit, 2 unit main body, 3 light emission unit, 4 light emission part, 11 peripheral wall part, 11a inner peripheral surface, 11b outer peripheral surface, 12 sealing member, 17 unit holding part, 17a holding wire passing hole, 21 Diffusion film, 22 aperture, 30 case, 31 attachment portion, 32 case reflection portion, 32a case opening portion, 32b contact surface, 33 opposite portion, 41 substrate, 42 light source, 43 feed attachment portion, 44 feed line, 100 Lamp, 102 unit main body, 113 neck part, 114 neck base part, 115 neck end part, 116 main body reflection part, 150 base, 151 base housing, 152 case cylindrical part, 153 case cover part, 154 cover recess, 155 cover Convex part, 156 base terminal, 157 bonding member, 200 lighting device, 203 light emitting unit, 205 lighting main body, 205a device Tool line hole, 206 lighting device, 207 socket, 300 lighting device, 303 light emitting unit, 307 socket.

Claims (14)

A light diffusing unit having a function of diffusing light and including an internal space;
A light emitting unit provided on the outside of the light diffusion unit such that light enters from the outside to the inside of the light diffusion unit;
A housing in which the light emitting unit is attached, and a housing opening is formed on the front surface of the light emitting unit;
Equipped with
The light diffusion unit is
It comprises a diffusion film provided on the inner circumferential surface and diffusing the light emitted from the light emitting unit,
The diffusion film is
A portion facing the light emitting portion is opened to form an aperture for transmitting light emitted from the light emitting portion,
The lamp has a width that is wider than the width of the housing opening. The lamp according to claim 1, wherein the light diffusion unit has a vacuum in an internal space. The lamp according to claim 1, wherein the diffusion film is a film having diffusion particles. The diffusing particles are
The lamp according to claim 3, containing one or more of metal oxides, phosphoric acid compounds, fluorides, organic pigments, dyes, and barium sulfate having an average particle diameter of 0.01 μm to 20.0 μm. The metal oxide is
The lamp according to claim 4, comprising at least one oxide selected from the group consisting of titanium, silicon, aluminum, zinc, yttrium, lanthanum, magnesium, cerium, bismuth, copper, nickel, gadolinium, zirconium and barium. The phosphate compound is
The lamp according to claim 4, comprising at least one compound selected from calcium pyrophosphate and strontium pyrophosphate. The fluoride is
The lamp according to claim 4, comprising at least one compound selected from magnesium fluoride, cerium fluoride, barium fluoride, strontium fluoride and aluminum fluoride. The organic pigment is
The lamp according to claim 4, comprising at least one pigment selected from an azo pigment and a dyed lake pigment. The dye is
The lamp according to claim 4, comprising at least one dye selected from an acid dye and a basic dye. The lamp according to any one of claims 1 to 9, wherein the diffusion film contains only an inorganic component. The lamp according to any one of claims 1 to 9, wherein the diffusion film contains an organic component. The illuminating device provided with the lamp | ramp of any one of Claims 1-11 which is provided in the outer side of the said light-diffusion unit, and has a light emission unit which accommodates the said light emission part. The light emitting unit is
Provided on a side of the light diffusing unit, the lighting apparatus according to claim 1 2, further comprising a housing reflector portion that reflects light emitted from the light emitting portion. The lamp is
Provided on the outer peripheral surface of the light diffusion units, the lighting device according to claim 1 2 or 1 3, further comprising a main reflecting portion that reflects light emitted from the light emitting portion.

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