JP2015115145A - Light source unit and lighting fixture using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source unit improved in general versatility: and to provide a lighting fixture using the light source unit.SOLUTION: A light source unit 2 includes an LED chip 21, a lens 22, an attachment member 23, and a heat-releasing member 24. The lens 22 is disposed at an illuminating surface side of the LED chip 21. With respect to the attachment member 23, the LED chip 21 and the lens 22 are mounted so that the LED chip 21 is disposed between the attachment member 23 and the lens 22. The heat-releasing member 24 is formed in a cylindrical state with its one surface open, the LED chip 21, the lens 22 and the attachment member 23 are housed inside in a direction where the attachment member 23 is at its bottom surface side and the lens 22 is at the opening side, so as to release heat generated in the LED chip 21.

Description

  The present invention relates to a light source unit and a lighting fixture using the same.

  Conventionally, a ceiling-embedded lighting fixture embedded in a ceiling has been provided (see, for example, Patent Document 1). The lighting fixture described in Patent Document 1 lights an appliance body embedded in a ceiling, a lamp device that is detachably attached to the appliance body, an emergency light source attached to the appliance body, and an emergency light source in an emergency And an emergency unit.

  The instrument main body is formed in a bottomed cylindrical shape having an open bottom surface, and a radiator is integrally provided at the bottom of the instrument main body. Also, the lamp device is housed inside the fixture body, and heat generated by the light source of the lamp device is radiated to the outside through the radiator of the fixture body.

JP 2012-204209 A

  Since the lighting fixture shown in the above-mentioned Patent Document 1 is provided with a radiator in the fixture body, for example, when changing the radiator according to the type of light source, the fixture body must also be replaced together. It was not very versatile.

  The present invention has been made in view of the above problems, and an object thereof is to provide a light source unit with improved versatility and a lighting fixture using the same.

  The light source unit of the present invention includes the light source and the light transmissive member, wherein the light source is disposed between a light source, a light transmissive member disposed on a light emitting surface side of the light source, and the light transmissive member. A heat-dissipating member, and a heat-dissipating member that dissipates heat generated by the light source. The heat-dissipating member is formed in a cylindrical shape with one surface open. The light source, the translucent member, and the attachment member are housed inside in a direction in which the member is on the opening side.

  In this light source unit, the translucent member is attached to the attachment member by inserting a projection provided on one of the translucent member or the attachment member into a first groove provided on the other. Is preferred.

  Moreover, in this light source unit, it is also preferable that the attachment member is attached to the heat dissipation member by hooking a hook portion provided on one of the attachment member or the heat dissipation member to a hooked portion provided on the other. .

  Further, in this light source unit, the hooked portion is provided inside the heat radiating member, and has a small diameter portion in which the translucent member is accommodated and an inner dimension in a first direction intersecting the optical axis of the light source. The hook portion is provided at both end portions of the mounting member in the first direction, and is formed between the large diameter portion in which the mounting member is accommodated larger than the small diameter portion. It consists of a pair of elastic bodies that incline in directions away from each other as it approaches the optical member, and the outer dimension of the pair of elastic bodies in the first direction is larger than the inner dimension of the small-diameter portion in the first direction. It is also preferable.

  In this light source unit, it is also preferable that the heat dissipation member has a first hole into which a jig for moving the hooking portion in a direction in which the hooking portion is detached from the hooked portion.

  Moreover, in this light source unit, it is also preferable that the mounting member has a housing recess for housing the light source so that the translucent member does not contact the light emitting surface of the light source.

  Further, in this light source unit, the mounting member has a power feeding connector portion protruding on the opposite side to the light transmissive member, and the heat radiating member has a second hole for exposing the connector portion to the outside. It is also preferable to have at the bottom.

  In the light source unit, it is also preferable that the second hole is provided at a position eccentric from the center of the bottom surface.

  In this light source unit, it is also preferable that the connector portion has a claw portion that is caught from the outside to the opening edge of the second hole in a state exposed to the outside through the second hole.

  Moreover, in this light source unit, it is preferable that the attachment member has a second groove portion in which an electric wire from the light source to the connector portion is accommodated.

  The lighting fixture of the present invention includes the light source unit, a fixture main body to which the light source unit is attached, and a power supply block that supplies power to the light source unit.

  According to the configuration of the present invention, by providing the heat radiating member in the light source unit, the same instrument main body can be used even when the heat radiating member is changed according to the type of the light source. There is an effect that it is possible to provide a lighting device.

(A) is a disassembled perspective view of the light source unit of this embodiment, (b) is a perspective view of another lens used in the same. The same as the above, (a) is the whole perspective view seen from the lower side, (b) is the whole perspective view seen from the upper side. (A) is a perspective view before attaching an LED chip to the attachment member used for the above, (b) is a perspective view after attaching an LED chip to the attachment member used for the above. (A)-(c) is sectional drawing same as the above. It is a disassembled perspective view of the lighting fixture using the same as the above.

  Hereinafter, embodiments of a light source unit and a lighting fixture using the light source unit will be described with reference to FIGS. In the following description, the longitudinal direction of the instrument body 1 is defined as the vertical direction (the opening 111 side is the lower side) unless otherwise specified.

  The luminaire 10 of this embodiment is a ceiling-embedded emergency light that is embedded in a ceiling, for example, and turns on the light source unit 2 when a commercial power supply fails. As shown in FIG. 5, the lighting fixture 10 includes a fixture main body 1, a light source unit 2, a power supply device 3, an emergency power supply 4, a terminal block 5, and a frame 6.

  The instrument main body 1 is made of an incombustible material such as a steel plate, for example, and has a main body 11 formed in a cylindrical shape that is long in the vertical direction. A circular opening 111 is provided at the lower end of the main body 11, and a flange 12 protruding laterally is provided at the opening edge of the opening 111 over the entire circumference. In addition, a pair of notches 112 and 112 opening in a T-shape are provided on the side wall of the main body 11 at positions symmetrical with respect to the central axis of the main body 11 (only one side is shown in FIG. 5). ).

  As shown in FIG. 5, the power supply device 3 has a case 31 that is long in the vertical direction, and a hooking claw 32 is integrally provided at the lower end of the case 31. Inside the case 31, there is a charging circuit (not shown) for charging the emergency power supply 4 with the commercial power supply during normal times when the commercial power supply is normally supplied, and the light source unit by the emergency power supply 4 when the commercial power supply fails. A power feeding circuit (not shown) for lighting 2 is housed. Here, in the present embodiment, a power supply block is configured by the power supply device 3.

  As shown in FIG. 5, the emergency power supply 4 has a case 41 that is long in the vertical direction, and a hooking claw 42 is integrally provided at the lower end of the case 41. Inside the case 41, a plurality of storage batteries (not shown) are stored side by side in the vertical direction. The emergency power supply 4 has a connection portion (not shown) that is electrically connected to a connected portion (not shown) of the power supply device 3, and the connection portion of the emergency power supply 4 is connected to the power supply device. 3 is connected to the power source device 3 and the emergency power source 4.

  The terminal block 5 has a main body 51 formed in a rectangular box shape, and a connection portion (fast connection terminal structure) to which an external power line (not shown) is connected to the upper end of the main body 51. (Not shown) is provided. In addition, a connected portion (not shown) to which a connecting portion (not shown) provided at the upper end portion of the power supply device 3 is electrically connected is provided at the lower end portion of the main body 51. Then, the terminal block 5 and the power supply device 3 are electrically connected by connecting an external power line to the connection portion of the main body portion 51 and connecting the connection portion of the power supply device 3 to the connected portion of the main body portion 51. Connected.

  The frame body 6 is made of an incombustible material such as a steel plate, for example, and has a frame portion 61 formed in a disk shape. A circular opening 611 is provided at the center of the frame portion 61. A pair of attachment springs 62 and 62 for attaching the frame body 6 to the instrument body 1 are attached to the upper surface of the frame portion 61 so as to face each other. Then, the frame body 6 is brought closer to the instrument main body 1 from below, and the attachment spring 62 corresponding to each spring receiving part (not shown) provided on the inner surface of the main body part 11 of the instrument main body 1 is hooked. Thus, the frame body 6 is attached to the instrument body 1.

  As shown in FIG. 1A, the light source unit 2 includes an LED chip 21 (light source), a lens 22 (translucent member), an attachment member 23, a heat radiating member 24, and a heat radiating sheet 25. The heat dissipation sheet 25 is attached in advance to the back surface of the LED chip 21 (upper surface in FIG. 1A).

  The lens 22 is made of, for example, transparent glass, and has a main body portion 221 formed in a columnar shape having a vertical axis as a central axis. A pair of projecting portions 222 and 222 projecting sideways are provided on the upper end edge of the main body portion 221 at positions symmetrical to the central axis of the main body portion 221. Further, as shown in FIG. 4A, the lower surface of the main body 221 is formed in a mortar shape that is recessed upward as it approaches the center side from the outer edge side. The lens 22 is disposed on the lower side (light emitting surface side) of the LED chip 21.

  The attachment member 23 is, for example, a synthetic resin molded product, and has a main body 231 formed in a disc shape as shown in FIGS. 3 (a) and 3 (b). A housing recess 231 a for housing the LED chip 21 is provided on the lower surface of the main body 231. In addition, a pair of protruding wall portions 232 and 232 formed in an L shape are provided on the outer peripheral edge of the main body portion 231 so as to face each other. As a result, a groove 232 a is formed between each protruding wall 232 and the lower surface of the main body 231.

  Further, a pair of elastic pieces 233 and 233 (elastic body) that incline toward each other (that is, outward) toward the outer peripheral edge of the main body portion 231 face each other as it approaches the lens 22 (that is, toward the lower side). Is provided. A connector portion 234 that protrudes upward is provided on the upper surface of the main body portion 231.

  The connector portion 234 includes a cylindrical body 234a formed in a rectangular tube shape, and a connection terminal 26 housed inside the cylindrical body 234a. The connection terminal 26 is electrically connected to the LED chip 21 via an electric wire 27. (See FIG. 4B). In addition, a pair of hooking claws 234b and 234b are provided on the side surface of the cylindrical body 234a of the connector portion 234 so as to be inclined away from each other toward the lower side.

  As shown in FIG. 3A, an opening 231d that opens in a rectangular shape is provided on the bottom surface of the housing recess 231a. A pair of L-shaped ribs 231e and 231e are provided facing each other at the opening edge of the opening 231d so as to exclude one of the pair of corners located diagonally. Further, a hooking claw 231f for attaching the LED chip 21 to the attachment member 23 is provided at the opening edge of the opening 231d.

  Furthermore, the opening 231d and the side and groove part 231c are provided in the bottom face of the accommodation recessed part 231a. The groove part 231c is for accommodating the electric wire 27 connected to the LED chip 21, as shown in FIG. 3B. In the present embodiment, the groove part 231c constitutes the second groove part.

  Further, a rib 231g is provided between the opening 231d and the groove 231c so as to separate them. Furthermore, a pair of holes 231b and 231b connected to the inside of the cylindrical body 234a of the connector part 234 are provided at a position corresponding to the connector part 234 on the bottom surface of the housing recess 231a. The LED chip 21 and the lens 22 are attached to the mounting member 23 such that the LED chip 21 is disposed between the mounting member 23 and the lens 22 in the vertical direction.

  The heat dissipating member 24 is made of, for example, aluminum having high heat dissipating properties, and has a main body 241 formed in a cylindrical shape as shown in FIGS. A circular opening 241 a is provided at the lower end of the main body 241, and a heat-dissipating fin 241 g protruding sideways is provided on the side wall of the main body 241 over the entire circumference. . Further, a rectangular hole 241b is provided at a position corresponding to the connector part 234 of the mounting member 23 on the bottom surface of the main body part 241, and a pair of holes 241c and 241c are provided so as to face each other (FIG. 2). (See (b)).

  Further, as shown in FIG. 4C, a small diameter portion 241 d that accommodates the lens 22 and a large diameter portion 241 e that accommodates the attachment member 23 are provided inside the main body portion 241. The inner diameter of the large diameter portion 241e in the first direction (left and right direction in FIG. 4C) intersecting the optical axis of the LED chip 21 is larger than the inner dimension of the small diameter portion 241d in the first direction. . Thereby, a step portion 241f is formed between the small diameter portion 241d and the large diameter portion 241e in the front-rear direction.

  Next, the assembly procedure of the light source unit 2 will be described. First, the operator attaches the LED chip 21 to which the heat dissipation sheet 25 is attached to the attachment member 23 so that the light emitting surface side is on the lower side. At this time, the operator inserts the corner of the LED chip 21 between the rib 231e and the rib 231g, and then fixes the opposite corner of the LED chip 21 with the hooking claw 231f. Thereby, LED chip 21 is accommodated in the accommodation recessed part 231a of the attachment member 23 (refer FIG.3 (b)).

  Thereafter, the operator connects the electric wires 27 and 27 connected to the LED chip 21 through the holes 231b and 231b of the mounting member 23 to the connection terminals 26 and 26, respectively. It is stored in the cylinder 234a of the portion 234.

  Further, the operator brings the lens 22 closer to the mounting member 23 from below, and inserts each protrusion 222 of the lens 22 into the corresponding groove 232 a of the mounting member 23. At this time, each protruding portion 222 comes into contact with the corresponding protruding wall portion 232, so that the protruding wall portion 232 bends outward, and when the lens 22 is further pushed, each protruding portion 222 is inserted into the corresponding groove portion 232a. As a result, the lens 22 is attached to the attachment member 23 (see FIG. 4A). Here, in the present embodiment, the first groove portion is constituted by the groove portion 232a.

  At this time, the LED chip 21 is disposed between the lens 22 and the mounting member 23 in the vertical direction, but the depth dimension of the housing recess 231a is set deeper than the thickness dimension of the LED chip 21, so that the lens 22 does not contact the light emitting surface of the LED chip 21.

  Finally, the operator stores the LED chip 21, the lens 22, and the attachment member 23 assembled together in the heat radiating member 24 in such a direction that the lens 22 is on the opening side and the attachment member 23 is on the bottom side.

  At this time, the connector portion 234 of the mounting member 23 is exposed to the outside through the hole 241 b of the heat radiating member 24. Then, both hooking claws 234b and 234b of the connector part 234 are hooked from the outside to the opening edge of the hole 241b, and the attachment member 23 is prevented from coming off from the heat radiating member 24 (see FIG. 4B). Here, in the present embodiment, the second hole is configured by the hole 241b, and the claw portion is configured by the hooking claw 234b.

  In the present embodiment, the outer dimension of the pair of elastic pieces 233 and 233 in the first direction (the left-right direction in FIG. 4C) is larger than the inner dimension of the small-diameter portion 241d in the first direction. . Therefore, when the LED chip 21, the lens 22, and the attachment member 23 assembled together are stored in the heat dissipation member 24, each elastic piece 233 of the attachment member 23 is caught by the corresponding step portion 241 f of the heat dissipation member 24, and the attachment member 23 is attached to the heat dissipation member 24. Here, in this embodiment, the hooking portion is configured by the elastic piece 233 of the mounting member 23, and the hooked portion is configured by the step portion 241 f of the heat radiating member 24.

  Here, as shown in FIG. 4C, the pair of holes 241c and 241c provided in the bottom surface portion of the heat radiating member 24 are provided so as to face the elastic pieces 233 and 233 of the mounting member 23, respectively. Then, for example, a jig (not shown) such as a flat-blade screwdriver is inserted into each hole 241c, and each elastic piece 233 is pushed inward (in a direction away from the step portion 241f), whereby the mounting member 23 is removed from the heat radiating member 24. Can be removed. Here, in the present embodiment, the first hole is constituted by the hole 241c.

  Subsequently, an assembly procedure of the lighting fixture 10 will be described. The operator stores the terminal block 5, the power supply device 3, the emergency power supply 4, and the light source unit 2 in the order in the instrument body 1, and then closes the opening 111 of the instrument body 1 with the frame body 6. At this time, the connecting portion of the power supply device 3 is connected to the connected portion of the terminal block 5, and the connecting portion of the emergency power supply 4 is connected to the connected portion of the power supply device 3.

  Further, the connector portion 234 of the light source unit 2 is connected to a connector portion (not shown) provided in the power supply device 3, and the power supply device 3 and the LED chip 21 are electrically connected. Further, the hooking claws 32 of the power supply device 3 and the hooking claws 42 of the emergency power supply 4 are respectively hooked on hooked portions (not shown) provided in the light source unit 2, and the light source unit 2 is connected to the power supply device 3 and the emergency power supply 4. Retained.

  By the way, it is also conceivable that the hole 241 b for exposing the connector portion 234 of the mounting member 23 to the outside is provided at the center of the bottom surface portion of the heat dissipation member 24. However, in this case, it is possible to attach the attachment member 23 in the opposite direction by 180 degrees. If the attachment member 23 is attached in the opposite direction, the polarity of the power source is reversed. Therefore, in the present embodiment, as shown in FIG. 4B, the hole 241b is eccentric from the center of the bottom surface portion of the heat radiating member 24 by a distance L1, thereby uniquely determining the mounting direction of the mounting member 23. , It is possible to suppress the polarity of the power source from being reversed.

  Thus, according to the present embodiment, by providing the heat radiating member 24 in the light source unit 2, the same instrument body 1 can be used even when the heat radiating member 24 is changed according to the type of the light source. The high light source unit 2 and the lighting fixture 10 can be provided. Further, the lens 22 can be attached to the attachment member 23 simply by inserting each protrusion 222 of the lens 22 into the corresponding groove 232a of the attachment member 23, and the workability is improved as compared with the case where the lens 22 is fixed using a screw or the like. be able to.

  Furthermore, when the LED chip 21, the lens 22 and the attachment member 23 assembled together are attached to the heat radiating member 24, they only need to be inserted, and the workability can be improved similarly. Further, when removing the LED chip 21, the lens 22 and the attachment member 23 attached to the heat radiating member 24, it is only necessary to push each elastic piece 233 in a direction away from the step portion 241f by a jig inserted into the hole 241c. Easy to remove.

  Furthermore, as in the present embodiment, when the housing recess 231a for housing the LED chip 21 is provided in the mounting member 23, the distance from the LED chip 21 to the lens 22 is constant, thereby performing desired light distribution control. Can be realized. Moreover, when the groove part 231c in which the electric wire 27 from the LED chip 21 to the connector part 234 is accommodated is provided in the attachment member 23 as in this embodiment, the lens 22 and the attachment member 23 are in an assembled state. It is possible to suppress the electric wire 27 from being caught between the two.

  Furthermore, when the lens 22 is disposed on the lower side of the LED chip 21 as in the present embodiment, it is possible to prevent a person from touching the LED chip 21 directly. Moreover, since a person cannot touch the LED chip 21 directly, the failure by the direct load with respect to the LED chip 21 can also be suppressed.

  Furthermore, when the instrument body 1 and the frame body 6 are formed of steel plates, the heat dissipation efficiency is lower than when the instrument body 1 and the frame body 6 are formed of aluminum, but the heat dissipation member 24 as in this embodiment. Can be suppressed in the light source unit 2.

  Since the emergency power supply 4 needs to be replaced depending on the life of the built-in storage battery, it is desirable that the emergency power supply 4 has a structure that can be easily replaced as in this embodiment. In this embodiment, the lens 22 is provided with the protrusions 222 and 222 and the mounting member 23 is provided with the grooves 232a and 232a. However, the lens 22 may be provided with the first groove and the mounting member 23 may be provided with the protrusion. Good.

  Further, in the present embodiment, as shown in FIG. 1A, the protrusions 222 are provided on a part of the lens 22 in the circumferential direction. However, as shown in FIG. It may be provided over the circumference, which can reduce the manufacturing cost.

  In this embodiment, the hooking portion (elastic piece 233) is provided on the mounting member 23, and the hooked portion (step portion 241f) is provided on the heat radiating member 24. However, the hooking portion is provided on the mounting member 23 and the heat radiating member is provided. A hooking portion may be provided at 24. Further, the hooking portion and the hooked portion are not limited to those of the present embodiment, and may have other shapes as long as the mounting member can be attached to the heat dissipation member.

  Moreover, the lighting fixture 10 of this embodiment is an example, For example, you may apply the light source unit which concerns on this invention to a ceiling direct attachment type lighting fixture. Further, in the present embodiment, the connection terminal 26 is inserted into the cylindrical body 234a of the connector portion 234. However, for example, the connection terminal 26 may be insert-molded together with the connector portion 234. In this case, insert molding becomes possible by connecting the LED chip 21 and the connection terminal 26 with a metal conductor.

  In the present embodiment, the LED chip 21 is used as the light source. However, for example, an organic light emitting diode (OLED) may be used as the light source, and the present invention is not limited to this embodiment.

  The light source unit 2 of the present embodiment includes an LED chip 21 (light source), a lens 22 (translucent member), an attachment member 23, and a heat dissipation member 24. The lens 22 is disposed on the light emitting surface side of the LED chip 21. The LED chip 21 and the lens 22 are attached so that the LED chip 21 is disposed between the attachment member 23 and the lens 22. The heat dissipating member 24 is formed in a cylindrical shape with one surface open, the LED chip 21, the lens 22 and the mounting member 23 are housed inside such that the mounting member 23 is on the bottom side and the lens 22 is on the opening side. Dissipates heat generated in

  Further, like the light source unit 2 of the present embodiment, the lens 22 is formed by inserting the protrusion 222 provided on one of the lens 22 or the attachment member 23 into the groove 232a (first groove) provided on the other. It is preferably attached to the attachment member 23.

  Further, like the light source unit 2 of the present embodiment, the attachment member 23 has a hook portion (elastic piece 233) provided on one of the attachment member 23 and the heat radiating member 24 and a hook portion (stage) provided on the other. It is preferable to attach to the heat radiating member 24 by hooking on the part 241f).

  Further, like the light source unit 2 of the present embodiment, the hooked portion is preferably provided inside the heat dissipation member 24. In this case, the hooked portion has a small-diameter portion 241d in which the lens 22 is accommodated and a large inner dimension in the first direction intersecting the optical axis of the LED chip 21 that is larger than the small-diameter portion 241d. It consists of the step part 241f formed between the diameter parts 241e. The hooking portions are provided at both ends of the mounting member 23 in the first direction, and include a pair of elastic pieces 233 and 233 (elastic body) that incline in directions away from each other as the lens 22 is approached. The outer dimension of the pair of elastic pieces 233 and 233 in the first direction is larger than the inner dimension of the small diameter portion 241d in the first direction.

  Further, like the light source unit 2 of the present embodiment, the heat radiating member 24 has a hole 241c (first hole) into which a jig for moving the hooking portion in a direction in which the hooking portion is detached from the hooked portion is inserted. It is preferable to have.

  Further, like the light source unit 2 of the present embodiment, the attachment member 23 preferably has an accommodation recess 231 a for accommodating the LED chip 21 so that the lens 22 does not contact the light emitting surface of the LED chip 21. .

  Further, like the light source unit 2 of the present embodiment, the attachment member 23 preferably has a power feeding connector portion 234 that protrudes on the opposite side of the lens 22. In this case, the heat radiating member 24 has a hole 241b (second hole) for exposing the connector portion 234 to the outside on the bottom surface portion.

  Further, like the light source unit 2 of the present embodiment, the hole 241 b is preferably provided at a position that is eccentric from the center of the bottom surface of the heat radiating member 24.

  Further, like the light source unit 2 of the present embodiment, the connector part 234 has a hooking claw 234b (claw part) that is caught from the outside to the opening edge of the hole 241b while being exposed to the outside through the hole 241b. Is preferred.

  Moreover, it is preferable that the attachment member 23 has the groove part 231c (2nd groove part) in which the electric wire 27 from the LED chip 21 to the connector part 234 is accommodated like the light source unit 2 of this embodiment.

  The lighting fixture 10 of this embodiment includes a light source unit 2, a fixture body 1 to which the light source unit 2 is attached, and a power supply device 3 (power supply block) that supplies power to the light source unit 2.

2 Light source unit 21 LED chip (light source)
22 Lens (Translucent member)
23 Mounting member 24 Heat dissipation member

Claims (11)

A light source, a translucent member disposed on the light emitting surface side of the light source, and an attachment member to which the light source and the translucent member are attached such that the light source is disposed between the translucent member And a heat dissipating member that dissipates heat generated by the light source,
The heat radiating member is formed in a cylindrical shape with one surface opened, and the light source, the light transmissive member, and the mounting member are housed inside such that the mounting member is on the bottom surface side and the light transmissive member is on the opening side. A light source unit.   The translucent member is attached to the attachment member by inserting a protrusion provided on one of the translucent member or the attachment member into a first groove provided on the other. Item 2. The light source unit according to Item 1.   The said attachment member is attached to the said heat radiating member by hooking the hook part provided in one of the said attachment member or the said heat radiating member on the to-be-hooked part provided in the other. The light source unit described. The hooked portion is provided inside the heat radiating member, and has a small-diameter portion in which the translucent member is accommodated, and an inner dimension in a first direction intersecting the optical axis of the light source is larger than the small-diameter portion. It consists of a step part formed between the large diameter part in which the mounting member is stored,
The hooking portion is provided at both end portions of the mounting member in the first direction, and includes a pair of elastic bodies that are inclined in directions away from each other as the light transmitting member is approached.
The light source unit according to claim 3, wherein an outer dimension of the pair of elastic bodies in the first direction is larger than an inner dimension of the small-diameter portion in the first direction.   The said heat radiating member has a 1st hole in which the jig | tool for moving the said hook part in the direction from which the said hook part remove | deviates from the said hooked part is inserted. Light source unit.   The said attachment member has an accommodation recessed part which accommodates the said light source so that the said translucent member may not contact the light emission surface of the said light source, The any one of Claims 1-5 characterized by the above-mentioned. The light source unit described. The mounting member has a power feeding connector portion that protrudes on the opposite side of the translucent member,
The light source unit according to claim 1, wherein the heat radiating member has a second hole in a bottom surface portion for exposing the connector portion to the outside.   The light source unit according to claim 7, wherein the second hole is provided at a position eccentric from a center of the bottom surface portion.   9. The light source unit according to claim 7, wherein the connector portion has a claw portion that is caught from the outside to the opening edge of the second hole in a state of being exposed to the outside through the second hole.   The light source unit according to claim 7, wherein the attachment member has a second groove portion in which an electric wire from the light source to the connector portion is accommodated.   An illumination fixture comprising: the light source unit according to any one of claims 1 to 10, a fixture main body to which the light source unit is attached, and a power supply block that supplies power to the light source unit.

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