Light source unit and lighting fixture

Abstract

To provide a light source unit and a lighting fixture that simplify the shape of a cover while suppressing sound from being generated.SOLUTION: A light source unit comprises: a light emission part which emits light; a fitting member which has a main part fitted with the light emission part, a side part bent and extending from a main part end part as an end part of the main part, and a tip part bent and extending from a side part end part as an end part of the side part; and a cover which has a translucent part covering the light emission part and a holding part extending from a cover end part as an end part of the translucent part to hold the fitting member, wherein the holding part of the cover has a first holding part extending from the cover end part toward the main part end part and a second holding part extending from the cover end part toward the side part end part to hold the side part with the first holding part.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a light source unit having a light-emitting portion and a lighting fixture. [Background technology]

[0002] Conventionally, light source units having a light-emitting portion have been known. Patent Document 1 discloses a light source unit in which a resin cover is attached to a metal mounting member. Generally, noise is generated when the thermal expansion coefficient of the cover differs from that of the mounting member. In Patent Document 1, a rib protruding toward the mounting member is received on the surface of the cover facing the mounting member, and the cover and mounting member are attached in a state in which the rib and the mounting member are in contact. In this way, Patent Document 1 attempts to suppress the generation of noise by bringing only the rib, which is a part of the cover, into contact with the mounting member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-059374 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the light source unit disclosed in Patent Document 1 has a cover with a complex shape because it is provided with ribs.

[0005] The present disclosure has been made to solve the above-mentioned problems, and provides a light source unit and a lighting fixture that suppresses noise generation while simplifying the shape of the cover. [Means for solving the problem]

[0006] The light source unit according to the present disclosure includes a light-emitting portion that irradiates light, a main portion to which the light-emitting portion is attached, an attachment member having side portions that bend and extend from the main portion end portions, which are ends of the main portion, and tip portions that bend and extend from the side portion end portions, which are ends of the side portions, and a cover having a light-transmitting portion that covers the light-emitting portion and a holding portion that extends from the cover end portions, which are ends of the light-transmitting portion, and holds the attachment member, and the holding portion of the cover includes a first holding portion that extends from outside the tip portions of the side portions toward the main portion end portions and has a linear portion that is inclined with respect to the main portion and the side portions, and a second holding portion that extends from outside the tip portions of the side portions toward the side portions and has a linear portion that is inclined with respect to the main portion and the side portions. and the main part a second holding portion having a linear portion inclined relative to the first holding portion and sandwiching the side portion together with the first holding portion; The first holding portion contacts the end of the main portion at the straight portion of the first holding portion, and does not contact the mounting member at other portions, and the second holding portion contacts the end of the side portion at the straight portion of the second holding portion, and does not contact the mounting member at other portions. do. [Effects of the Invention]

[0007] According to the present disclosure, the first and second holding portions sandwich the sides of the mounting member. In this way, the mounting member is in contact only with the first and second holding portions. Therefore, noise generation can be suppressed. Furthermore, since the first and second holding portions are sufficient to suppress noise generation, there is no need to provide ribs or the like. Therefore, the shape of the cover can be simplified while suppressing noise generation. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an assembled perspective view showing a lighting fixture according to a first embodiment of the present disclosure. [Figure 2] 1 is a side view showing a lighting fixture according to a first embodiment of the present disclosure. [Figure 3] 1 is an exploded perspective view showing a lighting fixture according to a first embodiment of the present disclosure. [Figure 4] 1 is a perspective view showing a light source unit according to a first embodiment of the present disclosure. [Figure 5] 1 is a side view showing a light source unit according to a first embodiment of the present disclosure. [Figure 6] 1 is a cross-sectional view showing a light source unit according to a first embodiment of the present disclosure. [Figure 7]1 is an enlarged cross-sectional view showing a light source unit according to a first embodiment of the present disclosure. [Figure 8] 1 is a cross-sectional view showing a lighting fixture according to a first embodiment of the present disclosure. [Figure 9] FIG. 10 is an enlarged cross-sectional view showing a light source unit according to a second embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of a light source unit and a lighting device according to the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the embodiments described below. Furthermore, in the following drawings, including FIG. 1, the size relationships between the components may differ from the actual size relationships. Furthermore, in the following description, terms indicating directions are used as appropriate to facilitate understanding, but these terms are for explanatory purposes and do not limit the present disclosure. Examples of terms indicating directions include "up," "down," "right," "left," "front," and "rear."

[0010] Embodiment 1 FIG. 1 is an assembled perspective view showing a lighting device 1 according to a first embodiment of the present disclosure, and FIG. 2 is a side view showing the lighting device 1 according to the first embodiment of the present disclosure. FIG. 3 is an exploded perspective view showing the lighting device 1 according to the first embodiment of the present disclosure. In the following description, the direction along the longitudinal direction of the lighting device 1 is referred to as the longitudinal direction (X-axis direction). Furthermore, the direction perpendicular to the longitudinal direction (X-axis direction) and shorter than the longitudinal direction (X-axis direction) is referred to as the short-side direction (Y-axis direction). Furthermore, the direction perpendicular to both the longitudinal direction (X-axis direction) and the short-side direction (Y-axis direction) is referred to as the up-down direction (Z-axis direction). Furthermore, the upward direction is referred to as the Z1 direction, and the downward direction is referred to as the Z2 direction. In this way, the X direction, Y direction, and Z direction are perpendicular to one another.

[0011] (Lighting fixture 1) 1 and 3 are views of the lighting fixture 1 as viewed from below Z2. As shown in FIGS. 1 to 3, the lighting fixture 1 is attached to a hanging bolt (not shown) provided on a mounting portion 2 such as a ceiling, and emits light. The lighting fixture 1 includes a fixture main body 10 attached to the hanging bolt, and a light source unit 20 detachably attached to the fixture main body 10.

[0012] (Apparatus body 10) The fixture body 10 is a longitudinally extending member that is attached to a suspension bolt provided on a mounting portion 2, such as a ceiling. The fixture body 10 has a body bottom 10a, body side portions 10b, body end portions 10c, and a body spring 10d. The body bottom 10a is attached to the suspension bolt and is a longitudinally extending plate-like member. The body side portions 10b are a pair of longitudinally extending plate-like members that extend toward each other from both Y-direction ends of the body bottom 10a. The body end portions 10c are members that are provided at both X-direction ends of the body bottom 10a and form a recess 11 together with the body side portions 10b. That is, the recess 11 is formed inside the fixture body 10. A part of the light source unit 20 is housed in the recess 11. The body spring 10d is an elastic member that is provided near both X-direction ends of the body bottom 10a.

[0013] (Light source unit 20) FIG. 4 is a perspective view illustrating a light source unit 20 according to the first embodiment of the present disclosure, and FIG. 5 is a side view illustrating the light source unit 20 according to the first embodiment of the present disclosure. The light source unit 20 emits light when power is supplied from an external power source (not shown). The light source unit 20 is detachably attached to the fixture body 10, and a portion of the light source unit 20 is housed in the recess 11 of the fixture body 10. As shown in FIGS. 4 and 5, the light source unit 20 includes a light-emitting unit 21, an attachment member 22, a cover 23, and a power supply unit 24.

[0014] (Light emitting unit 21) 6 is a cross-sectional view showing light source unit 20 according to embodiment 1 of the present disclosure, and is a partial cross-sectional view taken along the line BB in FIG. 5. Light-emitting unit 21 emits light downward Z2 using power supplied from power supply unit 24. As shown in FIG. 6, light-emitting unit 21 is attached to mounting member 22, and includes light-emitting element 211 and substrate 212.

[0015] (Light emitting element 211) The light-emitting elements 211 are, for example, light-emitting diodes (LEDs), and a plurality of them are linearly mounted on the substrate 212. The light-emitting elements 211 emit light downward in the Z2 direction. When the light-emitting elements 211 emit light, heat is generated. The light-emitting elements 211 are not limited to light-emitting diodes. For example, a solid-state laser, a semiconductor laser, an organic electroluminescence (EL), or an inorganic EL may be used as the light-emitting elements 211. The light-emitting elements 211 are not limited to being linearly mounted on the substrate 212, and may be mounted, for example, in a row or a staggered pattern on the mounting surface of the substrate 212 along the X direction of the substrate 212. The light-emitting elements 211 are, for example, pseudo-white LEDs, which are surface-mounted components formed by packaging an LED chip that emits blue light with a wavelength of 440 to 480 nm with a phosphor that converts the blue light to yellow light.

[0016] (Substrate 212) The substrate 212 is a long, plate-like member extending in the longitudinal direction X, and the light emitting element 211 is mounted on the surface on the downward Z2 side. The surface on the upward Z1 side of the substrate 212 is attached to the mounting member 22. The substrate 212 may be, for example, a glass-epoxy substrate (FR-4), a glass-composite substrate (CEM-3), a paper-epoxy substrate (FR-3), a paper-phenolic substrate (XPC), or a metal-based substrate.

[0017] (Mounting member 22) The mounting member 22 is a long, plate-like member extending in the longitudinal direction X, and is made of, for example, metal. The mounting member 22 may be formed by bending a single metal sheet, or may be formed by extrusion molding or the like. As shown in FIG. 6, the mounting member 22 has a main portion 221, side portions 222, and a tip portion 2221.

[0018] (Main part 221) The main portion 221 is a long, plate-like member extending in the longitudinal direction X, and has a first surface 2211 on the downward direction Z2 side and a second surface 2212 on the upward direction Z1 side. The light-emitting unit 21 is attached to the first surface 2211 of the main portion 221, and the power supply unit 24 is attached to the second surface 2212 of the main portion 221. As shown in FIG. 6 , both ends of the main portion 221 form main portion end portions 223. The range of the main portion end portions 223 is the end portion of the side portion 222 on the main portion 221 side, and may also be part of the R-shaped corner.

[0019] (side portion 222) The side portions 222 are a pair of members that extend in a bent manner from the main portion end portion 223 in the short direction Y and protrude upward in the Z1 direction. As shown in Fig. 6, the end of the side portion 222 opposite the main portion end portion 223 is a side portion end portion 224. The range of the side portion end portion 224 is the end portion of the tip portion 2221 on the side portion 222 side, and may also be part of the R-shaped corner.

[0020] (Tip 2221) The tip portions 2221 are a pair of members that bend and extend from the side end portions 224 and approach each other in the short direction Y. The tip portions 2221 describe, for example, a curl that forms an arc. The tip portions 2221 are a trajectory that is formed when rotating from the side end portions 224 of the side portions 222 toward the center of the main portion 221, and extend downward in the Z2 direction.

[0021] (Cover 23) The cover 23 is attached to the mounting member 22 so as to cover the light-emitting unit 21, and diffuses and transmits the light emitted by the light-emitting unit 21. The cover 23 is molded from a synthetic resin or the like having a higher thermal expansion coefficient than the material constituting the mounting member 22. Thus, in the first embodiment, the thermal expansion coefficient of the mounting member 22 differs from that of the cover 23. The cover 23 is made of, for example, translucent polycarbonate, acrylic, or polypropylene. As shown in FIG. 4, the cover 23 has a cover main body 231 and a cover lid 232.

[0022] (Cover main body 231) The cover main body 231 is elongated in the longitudinal direction X and U-shaped in the lateral direction Y. As shown in Fig. 6, the cover main body 231 has a light-transmitting portion 233 that transmits light emitted by the light-emitting unit 21, and a holding portion 234 that holds the side portion 222 of the mounting member 22.

[0023] (Transparent part 233) The light-transmitting portion 233 is provided to cover the light-emitting portion 21 and transmits light emitted by the light-emitting portion 21. The light-transmitting portion 233 has a light-transmitting main portion 2331 that irradiates the light emitted by the light-emitting portion 21 downward in the Z2 direction, and light-transmitting side portions 2332 that irradiate the light emitted by the light-emitting portion 21 toward the short side direction Y.

[0024] (Translucent main part 2331) The light-transmitting main portion 2331 constitutes the bottom surface of the light-transmitting portion 233, and is U-shaped in the short direction Y. The light-transmitting main portion 2331 transmits light emitted by the light-emitting portion 21 and irradiates it downward in the Z2 direction.

[0025] (Translucent side part 2332) The light-transmitting side portions 2332 constitute the side surfaces of the light-transmitting portion 233, and are discontinuously connected to both ends of the light-transmitting main portion 2331, extending in the upward direction Z1. The light-transmitting side portions 2332 transmit light emitted by the light-emitting unit 21 and irradiate the light toward the short-side direction Y. The upper end of the light-transmitting side portion 2332 forms a cover end portion 2333. The cover end portion 2333 is a portion that faces the side portion 222 of the mounting member 22 across a gap in the short-side direction Y when the cover 23 is attached to the mounting member 22.

[0026] The cover end 2333 may be provided in a range facing the side portion 222 in the short-side direction Y when the cover 23 is attached to the attachment member 22. The cover end 2333 is not limited to being provided in one location on the upward direction Z1 side of the light-transmitting portion 233. The cover end 2333 is housed in the recess 11 of the fixture body 10.

[0027] In this way, the cover end portion 2333 fits into the recess 11 when the light source unit 20 is attached to the fixture body 10, and therefore covers the gap that occurs between the side portion 222 and the cover body portion 231 in the short direction Y from the downward direction Z2 side. Furthermore, although the above example shows the case where the light-transmitting main portion 2331 and the light-transmitting side portion 2332 are discontinuously connected, the light-transmitting main portion 2331 and the light-transmitting side portion 2332 may also have a continuous arc shape. In this way, the light-transmitting portion 233 may have any shape as long as it can obtain a desired light distribution.

[0028] (Holding part 234) Fig. 7 is an enlarged cross-sectional view showing the light source unit 20 according to the first embodiment of the present disclosure. Fig. 7 is an enlarged view of portion C in Fig. 6. As shown in Fig. 7, the holding portion 234 extends from the cover end portion 2333 and holds the side portion 222 of the mounting member 22. The holding portion 234 is a pair of members provided to protrude from the cover end portion 2333 in directions approaching each other in the short direction Y. The holding portion 234 has a first holding portion 2341 provided to protrude downward in the direction Z2 as they approach each other in the short direction Y, and a second holding portion 2342 provided to protrude upward in the direction Z1 as they approach each other in the short direction Y.

[0029] (First holding portion 2341) The first holding portion 2341 protrudes from the cover end portion 2333 toward the main portion end portion 223 when the cover 23 is attached to the attachment member 22. The first holding portion 2341 is inclined relative to the main portion 221 and the side portion 222, and is in contact with the main portion end portion 223 that protrudes to face the first holding portion 2341.

[0030] (Second holding portion 2342) The second holding portion 2342 protrudes from the cover end portion 2333 toward the side end portion 224 when the cover 23 is attached to the attachment member 22. The second holding portion 2342 is in contact with the side end portion 224, which protrudes to face the second holding portion 2342, in a state of being inclined with respect to the side portion 222. Note that the second holding portion 2342 may be provided so as to protrude from the same position as the first holding portion 2341 on the cover end portion 2333, as in the first embodiment, or may be provided so as to protrude from a position different from that of the first holding portion 2341.

[0031] In this way, the holding portion 234 holds the side portion 222 of the mounting member 22 by sandwiching it from outside in the up-down direction Z and the short-side direction Y with the first holding portion 2341 and the second holding portion 2342.

[0032] (Power supply section 24) The power supply unit 24 has a long box shape extending along the longitudinal direction X. The power supply unit 24 converts power supplied from an external power supply (not shown) and supplies the power to the light-emitting unit 21. The power supply unit 24 is attached to the second surface 2212 side of the main unit 221.

[0033] (Cover lid part 232) The cover lids 232 are provided at both ends of the cover main body 231 in the longitudinal direction X, and close both ends of the cover main body 231 .

[0034] (Sound generated) Next, as an example of noise generated between the mounting member 22 and the cover 23, a creaking noise caused by the stick-slip phenomenon due to the difference in thermal expansion coefficient between the mounting member 22 and the cover 23 will be described.

[0035] In the light source unit 20, the mounting member 22 and the cover 23 have different thermal expansion coefficients, so there is a risk that the mounting member 22 and the cover 23 may become misaligned due to heat generated by the light emitting element 211. If the mounting member 22 and the cover 23 become misaligned, the mounting member 22 and the cover 23 of the light source unit 20 will rub against each other, generating a creaking noise. At this time, even if the amount of deformation of the cover 23 is greater than the amount of deformation of the mounting member 22, if the force generated by the difference in the amounts of deformation is smaller than the static friction force between the mounting member 22 and the cover 23, the relative positions of the mounting member 22 and the cover 23 will not change. At this time, the force generated by the difference in the amounts of deformation is accumulated as distortion of the cover 23.

[0036] When the force generated by the difference in deformation amount becomes larger than the static friction force, a state in which kinetic friction force acts between the mounting member 22 and the cover 23. At this time, the strain accumulated in the cover 23 is released, and the cover 23 deforms quickly along the mounting member 22 by the amount of the accumulated strain. As a result, the mounting member 22 and the cover 23 rub against each other strongly, generating a squeaking noise. In this way, the stick-slip phenomenon is a state in which a state in which static friction force and a state in which kinetic friction force act alternately between two or more substances.

[0037] (Effect of lighting fixture 1) Next, a description will be given of the effects of lighting fixture 1 according to embodiment 1. Embodiment 1 has the effect of suppressing creaking noise caused by the stick-slip phenomenon that occurs due to the difference in thermal expansion coefficient between mounting member 22 and cover 23.

[0038] FIG. 8 is a cross-sectional view of lighting fixture 1 according to embodiment 1 of the present disclosure, and is a partial cross-sectional view of cross section AA of FIG. 2. According to embodiment 1, as shown in FIG. 8, first holding portion 2341 and second holding portion 2342 sandwich side portion 222 of mounting member 22. In this manner, mounting member 22 is in contact only with first holding portion 2341 and second holding portion 2342. Therefore, noise generation can be suppressed. Furthermore, since first holding portion 2341 and second holding portion 2342 are sufficient to suppress noise generation, there is no need to provide ribs or the like. Therefore, the shape of cover 23 can be simplified while suppressing noise generation.

[0039] In the light source unit 20, the cover end 2333 of the light-transmitting portion 233 faces the side portion 222 with a gap in the short direction Y. The first holding portion 2341 is provided to protrude from the cover end 2333 to the main portion end 223 of the side portion 222, and the second holding portion 2342 is provided to protrude from the cover end 2333 to the side portion end 224. The light source unit 20 is attached with the holding portion 234 in contact with both ends of the side portion 222. This makes it possible to reduce the contact area between the holding portion 234 and the mounting member 22 without providing ribs, embossments, or the like on the holding portion 234, and also to suppress noise generated between the mounting member 22 and the cover 23. Therefore, in the light source unit 20 of the first embodiment, the shape of the cover 23 can be simplified in a case where the cover 23 has a shape that suppresses noise generated between the cover 23 and the mounting member 22.

[0040] Furthermore, the cover 23 has a simple shape because the retaining portion 234 is not provided with ribs or embossments. Therefore, in manufacturing the cover 23, a decrease in material yield can be suppressed, and an increase in manufacturing costs can be suppressed.

[0041] Furthermore, the light source unit 20 holds the mounting member 22 in the up-down direction Z and the short-side direction Y with the holding portions 234 in contact along the main portion 221 and the side portions 222 of the mounting member 22. In this case, the holding portions 234 contact and hold the mounting member 22 from three directions: the up-down direction Z1 side of the mounting member 22, the down-down direction Z2 side, and the outer side in the short-side direction Y. In the light source unit 20 of the first embodiment, the first holding portion 2341 contacts the main portion end portion 223 in a state inclined relative to the main portion 221 and the side portions 222, and the second holding portion 2342 contacts the side portion end portion 224 in a state inclined relative to the side portions 222. In this way, the holding portions 234 hold the mounting member 22 so as to sandwich it at two points in the up-down direction Z and the short-side direction Y.

[0042] Therefore, in the light source unit 20 of the first embodiment, the holding portion 234 contacts the side portion 222 at fewer locations than when the holding portion 234 holds the mounting member 22 in a state in which it is in contact along the main portion 221 and the side portion 222 of the mounting member 22. Therefore, the holding portion 234 can hold the mounting member 22 in the up-down direction Z and the short-side direction Y with a small contact area between the mounting member 22 and the cover 23. The first holding portion 2341 and the second holding portion 2342 can apply a load to the mounting member 22 from two directions by pressing the mounting member 22 in a state inclined relative to the main portion 221 and the side portion 222.

[0043] Furthermore, the light source unit 20 of the first embodiment has elasticity because the cover 23 is molded from resin or the like. The holding portions 234 are provided so that the first holding portions 2341 protrude downward in the Z2 direction as they approach each other, and the second holding portions 2342 protrude upward in the Z1 direction as they approach each other. The first holding portions 2341 and the second holding portions 2342 are shaped to widen in the up-down direction Z as they move toward the inside of the mounting member 22 in the short-side direction Y.

[0044] Therefore, by pressing the mounting member 22 in the short-side direction Y, the first holding portion 2341 and the second holding portion 2342 of the holding portion 234 are expanded in the vertical direction Z. As a result, in the light source unit 20 of the first embodiment, when the cover 23 is attached to the mounting member 22, the holding portion 234 can be inserted in a state in which it is expanded in the vertical direction Z. This makes it possible to easily insert the holding portion 234. Therefore, the assembly of the light source unit 20 can be improved.

[0045] In a conventional light source unit, when the second holding portion holds the tip of the light source unit from the inside of the mounting member in the short-side direction Y, the second holding portion holds the side of the mounting member from both the outside and inside of the mounting member in the short-side direction Y. This makes it difficult to insert the mounting member into the cover, which can lead to poor assembly. In contrast, in the light source unit 20 of the first embodiment, the second holding portion 2342 holds the side end portion 224 in contact with the mounting member 22 from the outside in the short-side direction Y. The cover 23 expands when pressed in the short-side direction Y or upward in the Z1 direction by the mounting member 22, making it easier to insert the cover 23 into the mounting member 22. Therefore, the light source unit 20 of the first embodiment can improve assembly when attaching the cover 23 to the mounting member 22.

[0046] Furthermore, in the light source unit 20 of the first embodiment, the first holding portion 2341 and the main end portion 223 are in contact, and the second holding portion 2342 and the side end portion 224 are in contact. This makes it possible to prevent a gap from being generated between the mounting member 22 and the cover 23. Furthermore, by preventing a gap from being generated between the mounting member 22 and the cover 23, it is possible to prevent insects and the like from entering the light source unit 20 from the outside to the inside.

[0047] In conventional lighting fixtures, when a gap exists between the recess and the side, most of the light emitted from the light-emitting unit does not enter the gap between the storage unit and the side, which can cause darkness. In the lighting fixture 1 of the first embodiment, the cover end 2333 is stored in the recess 11 of the fixture body 10. Therefore, in the lighting fixture 1 of the first embodiment, the gap that occurs between the recess 11 and the side 222 can be covered from the downward Z2 side of the lighting fixture 1 by the translucent portion 233. This can prevent darkness from occurring.

[0048] Embodiment 2 9 is an enlarged cross-sectional view showing a light source unit 20 according to a second embodiment of the present disclosure. In the second embodiment, the shape of a holding portion 234a differs from that of the first embodiment. In the second embodiment, parts common to the first embodiment are given the same reference numerals and description thereof will be omitted, and the description will focus on the differences from the first embodiment.

[0049] 9, the main end portion 223 and the side end portion 224 have a curved surface shape that protrudes toward the holding portion 234a. The holding portion 234a is provided so as to protrude from the cover end portion 2333a of the cover 23. The holding portion 234a has a first holding portion 2341a and a second holding portion 2342a that have arc-shaped cross sections with openings formed in directions that approach each other in the short-side direction Y. The holding portion 234a holds the mounting member 22 by sandwiching it in the short-side direction Y and the up-down direction Z.

[0050] The first holding portion 2341a and the second holding portion 2342a each have an arc shape, with the radius of curvature of the first holding portion 2341a being larger than the radius of curvature of the main portion end 223 and the radius of curvature of the second holding portion 2342a being larger than the radius of curvature of the side portion end 224. The first holding portion 2341a is provided to protrude from the cover end 2333a to the main portion end 223. The radius of curvature of the first holding portion 2341a is larger than the radius of curvature of the main portion end 223 and contacts the main portion end 223 at one point. The second holding portion 2342a is provided to protrude from the cover end 2333a to the side portion 224. The radius of curvature of the second holding portion 2342a is larger than the radius of curvature of the side portion 224 and contacts the side portion 224 at one point.

[0051] According to the second embodiment, the first holding portion 2341a is curved upward in the Z1 direction from the contact point with the main portion end 223 toward the cover end 2333 in the short-side direction Y. Therefore, the length of the first holding portion 2341a in the short-side direction Y can be shortened compared to when the first holding portion 2341a is linear. The second holding portion 2342a can also be shortened in the short-side direction Y, similar to the first holding portion 2341a. Therefore, the light source unit 20 of the second embodiment can be prevented from becoming large. Furthermore, in the light source unit 20 of the second embodiment, when the length of the holding portion 234a in the short-side direction Y is shortened, the distance between the cover end 2333 and the side portion 222 is shortened. Therefore, it is possible to prevent a dark area from occurring between the cover end 2333 and the side portion 222. [Explanation of symbols]

[0052] REFERENCE SIGNS LIST 1 lighting fixture, 2 mounting portion, 10 fixture body, 10a body bottom portion, 10b body side portion, 10c body end portion, 10d body spring, 11 recess, 20 light source unit, 21 light emitting portion, 22 mounting member, 23 cover, 24 power supply portion, 211 light emitting element, 212 substrate, 221 main portion, 222 side portion, 223 main portion end portion, 224 side portion end portion, 231 cover main body portion, 232 cover lid portion, 233 light transmitting portion, 234, 234a holding portion, 2211 first surface, 2212 second surface, 2221 tip portion, 2331 light transmitting main portion, 2332 light transmitting side portion, 2333, 2333a cover end portion, 2341, 2341a first holding portion, 2342, 2342a Second holding part.

Claims

1. a light-emitting unit that irradiates light; an attachment member having a main portion to which the light emitting portion is attached, a side portion that bends and extends from a main portion end portion that is an end portion of the main portion, and a tip portion that bends and extends from a side portion end portion that is an end portion of the side portion; a cover including a light-transmitting portion that covers the light-emitting portion and a holding portion that extends from a cover end that is an end of the light-transmitting portion and holds the mounting member; The holding portion of the cover is a first holding portion having a linear portion extending from outside the tip end of the side portion toward the end of the main portion and inclined relative to the main portion and the side portion; a second holding portion that extends from outside the tip end of the side portion toward the side end portion, has a linear portion that is inclined with respect to the side portion and the main portion, and holds the side portion together with the first holding portion; the first holding portion contacts the end of the main portion at the linear portion of the first holding portion, and does not contact the mounting member at other portions; The second holding portion is in contact with the side end portion at the linear portion of the second holding portion, and is not in contact with the mounting member at other portions of the second holding portion.

2. The main end and the side end have a curved surface shape that protrudes toward the holding portion. The light source unit according to claim 1 .

3. a light-emitting unit that irradiates light; an attachment member having a main portion to which the light emitting portion is attached, a side portion that bends and extends from a main portion end portion that is an end portion of the main portion, and a tip portion that bends and extends from a side portion end portion that is an end portion of the side portion; a cover including a light-transmitting portion that covers the light-emitting portion and a holding portion that extends from a cover end that is an end of the light-transmitting portion and holds the mounting member; The holding portion of the cover is a first retaining portion extending from the cover end toward the main portion end; a second holding portion extending from the cover end toward the side end and sandwiching the side together with the first holding portion; The main portion end portion and the side portion end portion have a curved surface shape that protrudes toward the holding portion side, The first holding portion and the second holding portion each have an arc shape as a whole, The radius of curvature of the first holding portion is greater than the radius of curvature of the main portion end portion, The radius of curvature of the second holding portion is greater than the radius of curvature of the side end portion; The main portion is formed to extend in one direction, and when the one direction is defined as a longitudinal direction of the main portion and a direction perpendicular to the one direction is defined as a lateral direction of the main portion, The mounting member is When viewed in cross section along the short side direction, the mounting member contacts the holding portion at two locations, the main portion end and the side end, and other portions of the mounting member do not contact the holding portion. Light source unit.

4. The holding portion is The side portion of the mounting member is sandwiched from the outside in the vertical direction and the short-side direction. The light source unit according to any one of claims 1 to 3.

5. The light source unit according to any one of claims 1 to 4, a fixture body having a recess formed therein for accommodating the cover end of the light source unit; A lighting fixture comprising:

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