Light emitting unit, light source unit and lighting fixture

Abstract

To provide a light emitting part, a light source unit, and a luminaire that have sufficient insulation performance without upsizing a light emitting board.SOLUTION: A light emitting part comprises: a light emitting board in which a plurality of light emitting elements are mounted on a mounting surface of a long board; and a holding frame comprising a long fitting surface part fitted with the light emitting board, side surface parts provided on both end parts in a short direction of the fitting surface part, and protruding in a direction intersecting with the fitting surface part from the end parts, and convex parts provided on the side surface parts, and protruding on the side of the fitting surface part so that gaps larger than the thickness of the board are formed between the fitting surface part and them, and holding the light emitting board in such a manner that the board is inserted into the gaps between the fitting surface part and the convex parts.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a light-emitting section, a light source unit, and a lighting fixture that include a light-emitting element. [Background technology]

[0002] Conventionally, a light source unit has been disclosed that includes a light emitting board having a plurality of light emitting elements and a board on which the plurality of light emitting elements are mounted, and a frame that holds the light emitting board. Patent Document 1 discloses a straight tube type LED lamp in which an LED board extending in the longitudinal direction and on which LED light emitting elements are mounted is held by a metal support member that is a frame. In Patent Document 1, the LED board is held by the support member by clamping both ends of the LED board in the lateral direction in a support gutter having elasticity in which both ends of the support member in the lateral direction are bent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-063616 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the frame of the straight tube LED lamp disclosed in Patent Document 1 is made of a metal material, so it is necessary to increase the size of the light emitting substrate, which is made up of the LED light emitting element and the LED substrate, to increase the distance between the conductive pattern of the light emitting substrate and the frame, thereby improving the insulation.

[0005] The present disclosure has been made to solve the above-mentioned problems, and provides a light-emitting section, a light source unit, and a lighting fixture that have sufficient insulation properties without increasing the size of the light-emitting substrate. [Means for solving the problem]

[0006] The light emitting unit according to the present disclosure comprises: a light emitting board having a plurality of light emitting elements mounted on a mounting surface of a long-shaped board; a long-shaped mounting surface portion to which the light emitting board is attached; side portions provided at both ends in a short direction of the mounting surface portion and protruding from the ends in a direction intersecting with the mounting surface portion; and a convex portion provided on the side portion and protruding towards the mounting surface portion so that a gap larger than the thickness of the board is formed between the mounting surface portion and the holding frame, the light emitting board being held by inserting the board into the gap between the mounting surface portion and the convex portion. The holding frame has a slit at the connection between the mounting surface and the side surface. . Effect of the Invention

[0007] According to the present disclosure, the multiple protrusions on the side surface of the holding frame sandwich the substrate together with the mounting surface. That is, the protrusions sandwich and fix only a part of the substrate, not the entire substrate. Therefore, if the conductive pattern of the light-emitting substrate is provided at a position away from the protrusions, the conductive pattern and the holding frame are sufficiently insulated. Therefore, the light source unit has sufficient insulation without increasing the size of the light-emitting substrate. [Brief description of the drawings]

[0008] [Figure 1] 1 is an assembled perspective view showing a lighting fixture according to a first embodiment. [Diagram 2] FIG. 1 is an exploded perspective view showing a lighting fixture according to a first embodiment. [Diagram 3] FIG. 2 is an exploded perspective view showing the light source unit according to the first embodiment. [Figure 4] 2 is a side view showing a light-emitting section according to the first embodiment. FIG. [Diagram 5] FIG. 2 is an exploded perspective view showing a light-emitting section according to the first embodiment. [Figure 6] FIG. 2 is a side view showing the holding frame according to the first embodiment. [Figure 7] FIG. 2 is a perspective view showing a light-emitting section according to the first embodiment. [Figure 8] 5 is a diagram showing forces applied when bending the support frame according to the first embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment 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 embodiment described below. In addition, the size relationship of each component in the following drawings, including FIG. 1, may differ from the actual one. In addition, in the following description, terms indicating directions are used as appropriate to facilitate understanding, but these terms are for the purpose of explanation 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 fixture 1 according to the first embodiment, and Fig. 2 is an exploded perspective view showing the lighting fixture 1 according to the first embodiment. The lighting fixture 1 irradiates light to an illuminated object, and includes a fixture body 100, a power supply device 130, and a light source unit 200, as shown in Figs. 1 and 2. The longitudinal direction in which the light source unit 200 extends is defined as the X direction, the lateral direction of the light source unit 200 is defined as the Y direction, the upward direction in the height direction is defined as the Z1 direction, and the downward direction in the height direction is defined as the Z2 direction.

[0011] (Apparatus body 100) The fixture body 100 is a box-shaped member that is attached to a mounting portion 10 such as a ceiling. The fixture body 100 has a frame-shaped frame portion 110, a partition portion 120, and a bottom plate 110b.

[0012] (Frame portion 110) The frame 110 is rectangular and has four side plates 110a. Each of the four side plates 110a is a plate-like member extending in one direction. Two of the side plates 110a are disposed in positions facing each other, and the remaining two side plates 110a are also disposed in positions facing each other, forming a rectangular frame 110 with the four side plates 110a. The frame 110 has two fixing members 150 provided on two of the four side plates 110a. The fixing members 150 are members used to attach and fix the device body 100 to the attachment portion 10.

[0013] (Partition 120) Two partitions 120 are provided inside the frame 110, and are plate-like members extending in one direction with the same length as the side plates 110a. The partitions 120 divide the frame 110, which is formed by the four side plates 110a, into three spaces. The spaces on both sides are light source accommodating sections 111, and the space sandwiched between the two light source accommodating sections 111 is an equipment accommodating section 112. The light source accommodating section 111 accommodates the power supply device 130 and the light source unit 200, and the equipment accommodating section 112 accommodates equipment components (not shown) such as a speaker or an emergency light.

[0014] (Bottom plate 110b) The bottom plate 110b connects the upper ends of the four side plates 110a. In the bottom plate 110b, a ventilation opening 110c is formed in a portion corresponding to the light source housing portion 111, which serves as an air conditioning return for ventilation between the living room and the space above the ceiling.

[0015] (Power supply 130) 2, the power supply device 130 is attached to the bottom plate 110b in one of the light source housing parts 111 of the fixture body 100. The power supply device 130 supplies power to the light source unit 200, and is connected to an external power source (not shown). The light source unit 200 is turned on by receiving power from the power supply device 130.

[0016] (Light source unit 200) Fig. 3 is an exploded perspective view showing the light source unit 200 according to the first embodiment. The light source unit 200 is turned on by power supplied from the power supply device 130, and is housed in the light source housing portion 111 of the fixture body 100. As shown in Fig. 3, the light source unit 200 includes a frame 210, a light emitting portion 220, a cover 230, a lid portion 240, and a fixing portion 250. In the light source unit 200, the light emitting portion 220 is provided on one side in the short side direction of the frame 210, and the light irradiated from the one side is irradiated to the irradiated object via the cover 230.

[0017] (Frame 210) The frame 210 is a metal housing extending in the longitudinal direction and housing the light emitting unit 220. The frame 210 is formed, for example, by bending a metal plate, and has a base portion 211, a pair of side portions 212, and a pair of flange portions 213.

[0018] (base 211) The base 211 is disposed on the side of the fixture body 100, and has a rectangular shape extending in the longitudinal direction. The base 211 is formed with a mounting hole 211a for mounting the holding frame 222 of the light emitting unit 220. The inner surface of the frame 210 has a reflective function of reflecting light irradiated from the light emitting substrate 221 of the light emitting unit 220. The reflective function may be imparted by attaching a reflective material or by painting a reflective material.

[0019] (Side portion 212) The pair of side portions 212 are plate-like members that protrude from both ends of the base portion 211 in the short side direction toward the opposite side to the instrument body 100 and extend in the longitudinal direction. The length of the side portions 212 in the short side direction is longer than the length of the mounting surface portion 2221 of the holding frame 222 in the short side direction.

[0020] (Flange part 213) The flange portions 213 are plate-like members that protrude from the tips of the pair of side portions 212 toward the opposing side portions 212 and extend in the longitudinal direction. In this manner, the frame 210 is open at both longitudinal ends and on the face opposite to the device body 100.

[0021] (Light emitting unit 220) Fig. 4 is a side view showing the light emitting unit 220 according to the first embodiment, and Fig. 5 is an exploded perspective view showing the light emitting unit 220 according to the first embodiment. The light emitting unit 220 irradiates light, and is disposed between one of the side parts 212 of the frame 210, the base part 211, and the flange part 213, as shown in Fig. 3. As shown in Figs. 4 and 5, the light emitting unit 220 has a light emitting board 221 and a holding frame 222.

[0022] (Light emitting substrate 221) The light emitting substrate 221 includes a light emitting element 2211 and a substrate 2212 .

[0023] (Light emitting element 2211) The light emitting element 2211 is a light source of the light source unit 200, and emits light when power is supplied. For example, a light emitting diode (hereinafter referred to as LED) element is used as the light emitting element 2211. The light emitting element 2211 is not limited to a configuration in which it is mounted linearly on the substrate 2212, and may be mounted, for example, on the mounting surface of the substrate 2212 in a row or a staggered pattern along the longitudinal direction (X-axis direction) of the substrate 2212. The light emitting element 2211 is, for example, a pseudo white LED element that is a surface-mounted component in which a phosphor that converts the wavelength of blue light to yellow light is arranged on an LED chip that emits blue light with a wavelength of 440 to 480 [nm] and packaged.

[0024] The light emitting element 2211 is not limited to a light emitting diode element. For example, a solid state laser, a semiconductor laser, an organic EL (Electro Luminescence), an inorganic EL, or the like may be used as the light emitting element 2211.

[0025] (Substrate 2212) The substrate 2212 is a plate-like member extending in the longitudinal direction, with a plurality of light-emitting elements 2211 mounted on a mounting surface. The back surface of the surface opposite to the mounting surface is attached to the holding frame 222. The length of the substrate 2212 in the longitudinal direction (X-axis direction) is equal to the length of the mounting surface portion 2221 of the holding frame 222 and the frame 210. For example, a glass-epoxy substrate (FR-4), a glass-composite substrate (CEM-3), a paper-epoxy substrate (FR-3), a paper-phenol substrate (XPC), or a metal-based substrate is used for the substrate 2212.

[0026] (holding frame 222) The holding frame 222 is a metal member extending along the longitudinal direction and holding the light emitting board 221. The holding frame 222 is, for example, formed by bending a metal plate, and has an attachment surface portion 2221 and a pair of side surfaces 2222.

[0027] (Mounting surface portion 2221) 6 is a side view showing holding frame 222 according to embodiment 1. Mounting surface portion 2221 is a plate-like member extending in the longitudinal direction to which the back surface of substrate 2212 is attached. As described above, the longitudinal length of mounting surface portion 2221 is equal to the length of substrate 2212.

[0028] (Slit part 2225) As shown in FIG. 5 and FIG. 6, slits 2225 are formed at both ends in the short side direction of the mounting surface portion 2221. The slits 2225 are formed at predetermined intervals in the long side direction of the mounting surface portion 2221. In the first embodiment, five slits 2225 are formed at each end in the short side direction of the mounting surface portion 2221. The slits 2225 are not limited to those formed in the mounting surface portion 2221, but may be formed in the side surface portion 2222, or may be formed across the mounting surface portion 2221 and the side surface portion 2222. In this way, the slits 2225 may be formed at the connection portion between the mounting surface portion 2221 and the side surface portion 2222. The slits 2225 are provided across the mounting surface portion 2221 and the side surface portion 2222. The slits 2225 are provided so as to be at the same position as the convex portion 2224 of the side surface portion 2222 in the long side direction.

[0029] As described above, the holding frame 222 is attached to the frame 210. The mounting surface portion 2221 of the holding frame 222 has the slit portion 2225 formed therein, but the mounting surface portion 2221 is covered by the side portion 212 of the frame 210. Therefore, it is possible to prevent light from leaking to the outside of the fixture body 100 through the slit portion 2225.

[0030] (Side part 2222) The pair of side surface portions 2222 are plate-shaped members provided at both ends of the short side direction of the mounting surface portion 2221, protruding in a direction away from the substrate 2212, and extending in the longitudinal direction. The longitudinal length of the side surface portion 2222 is shorter than the length of the mounting surface portion 2221. As described above, the longitudinal length of the mounting surface portion 2221 is equal to that of the substrate 2212. Therefore, both ends of the mounting surface portion 2221 and the substrate 2212 in the longitudinal direction protrude beyond the side surface portion 2222. As shown in FIG. 4 and FIG. 6, the pair of side surface portions 2222 have a first side surface portion 2222a attached to the frame 210 and a second side surface portion 2222b whose protruding amount from the mounting surface portion 2221 is shorter than that of the first side surface portion 2222a. A mounting opening 2222c for mounting the base 211 of the frame 210 is formed in a portion of the first side surface portion 2222a that is longer than the second side surface portion 2222b. As shown in Fig. 4, a fastening member 300 such as a screw is inserted and screwed into the mounting hole 211a of the base 211 of the frame 210 and the mounting opening 2222c of the first side surface portion 2222a while they are overlapped. In this way, the holding frame 222 is mounted to the frame 210.

[0031] As described above, the length in the short direction of the side portion 212 of the frame 210 is longer than the length in the short direction of the mounting surface portion 2221 of the holding frame 222. For this reason, a space S is formed between the second side surface portion 2222b and the flange portion 213 of the frame 210, as shown in FIG.

[0032] (Convex part 2224) As shown in FIG. 5 and FIG. 6, the pair of side portions 2222 have a plurality of convex portions 2224. The convex portions 2224 are each shaped like a sphere divided into four equal parts protruding toward the opposing side portion 2222. The convex portions 2224 are formed, for example, by cutting and raising a part of the side portion 2222. The shape of the convex portions 2224 does not have to be a sphere divided into four equal parts, as long as the convex portions 2224 are formed by pressing a metal plate and protruding. In the present embodiment 1, five convex portions 2224 are formed on each end of the pair of side portions 2222 on the mounting surface portion 2221 side. As shown in FIG. 5, the slit portion 2225 is formed at a position opposite the convex portion 2224. Here, as shown in FIG. 6, a gap C into which the light emitting substrate 221 is inserted is formed between the convex portions 2224 and the mounting surface portion 2221. The gap C is thicker than the thickness of the light emitting substrate 221.

[0033] FIG. 7 is a perspective view showing the light emitting unit 220 according to the first embodiment. As shown in FIG. 7, the light emitting board 221 having the board 2212 and the light emitting element 2211 is inserted into the gap C formed between the convex portion 2224 and the mounting surface portion 2221, and is attached to the holding frame 222. That is, the convex portion 2224 sandwiches the board 2212 together with the mounting surface portion 2221. Even if the light emitting board 221 tries to move away from the mounting surface portion 2221, the light emitting board 221 hits the convex portion 2224, and is prevented from moving away from the mounting surface portion 2221. In this way, the convex portion 2224 restricts the light emitting board 221 from moving away from the mounting surface portion 2221. As described above, the light emitting board 221 is inserted into the gap C, and thus the light emitting board 221 is sandwiched between the first side surface portion 2222a and the second side surface portion 2222b.

[0034] FIG. 8 is a diagram showing the force applied when bending the holding frame 222 according to the first embodiment. Next, the force applied when bending the holding frame 222 will be described. As shown in FIG. 8, when bending a metal plate to form the mounting surface portion 2221 and the side surface portion 2222, a force Fo acts on the outside of the metal plate when bending the metal plate, pulling the metal plate in a direction away from the corner R to be bent as a starting point. On the other hand, a force Fi acts on the inside of the metal plate when bending the metal plate, pulling the metal plate in a direction toward the corner R to be bent as an end point. This force Fi acting on the inside is a force that pulls the convex portion 2224 toward the corner R to make it flat. In the first embodiment, the slit portion 2225 is formed at the connection portion between the mounting surface portion 2221 and the side surface portion 2222, and is provided at a position facing the convex portion 2224, so that the force Fi acting on the inside can be absorbed. This makes it possible to prevent the convex portion 2224 from becoming flat. Therefore, even if the light emitting board 221 tries to move away from the attachment surface portion 2221, the convex portion 2224 can prevent the light emitting board 221 from moving.

[0035] (Cover 230) The cover 230 is attached to the frame 210 and is a plate-like member made of resin extending in the longitudinal direction for diffusing the light irradiated from the light emitting unit 220. As shown in FIG. 3, the cover 230 has a cover portion 231 and a diffusion portion 232. The cover portion 231 is a rectangular member and has transparency. The diffusion portion 232 is a rectangular member that diffuses the light transmitted through the cover portion 231. The cover portion 231 and the diffusion portion 232 may be integrally formed.

[0036] 4, an end of the cover 230 is inserted into and held in a space S formed between the second side surface portion 2222b of the holding frame 222 and the flange portion 213 of the frame 210. In this way, the cover 230 is held simply by being inserted between the second side surface portion 2222b and the flange portion 213, and therefore no separate part is required for fixing the cover 230. Therefore, the light source unit 200 can reduce the number of parts.

[0037] (Lid part 240) 3, lid portion 240 is a plate-like member provided on each of both longitudinal ends of frame 210. Lid portion 240 closes the space surrounded by frame 210 and cover 230, and prevents light emitted from light-emitting portion 220 from leaking from portions other than cover 230.

[0038] (Fixed part 250) The fixing parts 250 are a pair of members that attach and fix the frame 210 to the instrument body 100. The fixing parts 250 are attached to both longitudinal ends of the surface of the frame 210 facing the instrument body 100. The fixing parts 250 are fixed to the side plate 110a of the instrument body 100 by connecting members (not shown) such as screws. The fixing parts 250 may be configured to engage with the instrument body 100 by springs, claws, or the like.

[0039] According to the first embodiment, the multiple protrusions 2224 of the side surface portion 2222 of the holding frame 222 sandwich the board 2212 together with the mounting surface portion 2221. That is, the protrusions 2224 sandwich and fix not the entire board 2212 but a part of it. Therefore, if the conductive pattern of the light emitting board 221 is provided at a position away from the protrusions 2224, the conductive pattern and the holding frame 222 are sufficiently insulated from each other. Therefore, since there is no need to increase the width of the light emitting board 221 in the light source unit 200, the light emitting board 221 has sufficient insulation without increasing its size.

[0040] In addition, a slit portion 2225 is formed at the connection portion between the mounting surface portion 2221 and the side surface portion 2222, and the slit portion 2225 is provided at a position facing the protrusion portion 2224. Therefore, when the mounting surface portion 2221 and the side surface portion 2222 are formed by bending the sheet metal, the force acting inward can be absorbed. This makes it possible to prevent the protrusion portion 2224 from becoming flat. Therefore, even if the light emitting substrate 221 tries to move away from the mounting surface portion 2221, the protrusion portion 2224 can suppress the movement of the light emitting substrate 221. The slit portion 2225 makes it possible for the protrusion portion 2224 to avoid contact with a metal fitting for bending a portion facing the protrusion portion 2224 in the longitudinal direction, and to suppress the protrusion portion 2224 from being pulled inward.

[0041] Furthermore, the pair of side surface portions 2222 have a first side surface portion 2222a attached to the frame 210 and a second side surface portion 2222b that is shorter than the first side surface portion 2222a. Therefore, when the fastening member 300 is inserted into the attachment opening 2222c formed in the first side surface portion 2222a, the fastening member 300 is inserted straight without being hindered by the second side surface portion 2222b. [Explanation of symbols]

[0042] 1 lighting fixture, 10 mounting portion, 100 fixture body, 110 frame portion, 110a side plate, 110b bottom plate, 110c ventilation opening, 111 light source housing portion, 112 equipment housing portion, 120 partition portion, 130 power supply unit, 150 fixing member, 200 light source unit, 210 frame, 211 base portion, 211a mounting hole, 212 side portion, 213 flange portion, 220 light emitting portion, 221 light emitting substrate, 222 holding frame, 230 cover, 231 cover portion, 232 diffusion portion, 240 lid portion, 250 fixing portion, 300 fastening member, 2211 light emitting element, 2212 substrate, 2221 mounting surface portion, 2222 side portion, 2222a first side portion, 2222b Second side portion, 2222c mounting opening, 2224 protrusion portion, 2225 slit portion.

Claims

1. a light emitting substrate having a plurality of light emitting elements mounted on a mounting surface of a long substrate; a holding frame having an elongated mounting surface portion to which the light emitting board is attached, side portions provided at both ends in a short direction of the mounting surface portion and protruding from the ends in a direction intersecting with the mounting surface portion, and a protrusion provided on the side portion and protruding toward the mounting surface portion so that a gap larger than a thickness of the board is formed between the mounting surface portion and the side portion, the holding frame holding the light emitting board by inserting the board into the gap between the mounting surface portion and the protrusion; Equipped with The holding frame includes: A slit portion is formed at a connection portion between the mounting surface portion and the side surface portion. Light-emitting part.

2. The light emitting substrate is The substrate is inserted into the gap between the mounting surface portion and the protrusion by moving along the longitudinal direction of the mounting surface portion. The light emitting section according to claim 1 .

3. The light emitting substrate is When the substrate is inserted into the gap between the mounting surface portion and the protrusion, the substrate is held between the side surfaces of the mounting surface portion. The light-emitting section according to claim 1 .

4. A light emitting unit according to any one of claims 1 to 3, a housing having a rectangular base and a side portion provided at an end portion in a short direction of the base and protruding from the end portion, the housing housing the light emitting portion such that light is irradiated from the light emitting element to the base; A light source unit comprising:

5. A box-shaped device main body that is attached to the attachment portion; A light source unit having the light emitting section according to any one of claims 1 to 3; A lighting fixture comprising:

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