Lighting device and street light

Abstract

To provide a lighting device which can secure workability during maintenance of a light source, and to provide a street light.SOLUTION: A lighting device disclosed by the application includes: a light source unit 30; a lighting body 10; a first reflection member 21; and a second reflection member 22. The light source unit 30 has a light source 31 which emits light. The lighting body 10 covers the light source unit 30. The first reflection member 21 is attached to the lighting body 10 and reflects the light emitted from the light source 31. The second reflection member 22 is provided with the light source unit 30 and reflects the light emitted from the light source 31. The second reflection member 22 is detachably attached to the first reflection member 21.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a lighting device and a street lamp.

Background Art

[0002] Patent Document 1 discloses a light source unit that is attached to a lighting body and includes a light source and a reflecting surface that functions as a reflector for reflecting light emitted from the light source.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the lighting device of Patent Document 1, when maintaining the light source, it is necessary to remove the entire light source unit having the reflecting surface from the lighting body. For this reason, for example, when the opening of the reflecting surface is provided large, there is a problem that the size of the light source unit removed from the lighting body increases and it is difficult to ensure workability.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a lighting device and a street lamp that can ensure workability during maintenance of the light source.

Means for Solving the Problems

[0006] The lighting device disclosed in the present application includes a light source unit, a lighting main body, a first reflecting member, and a second reflecting member. The light source unit has a light source that emits light. The lighting main body covers the light source unit. The first reflecting member is attached to the lighting main body and reflects the light emitted from the light source. The second reflecting member is attached to the light source unit and reflects the light emitted from the light source. The second reflecting member is detachably attached to the first reflecting member.

[0007] In the lighting device disclosed in the present application, it is preferable that both the first reflecting member and the second reflecting member are annular in a plan view, overlap in the optical axis direction of the light source, and are coaxially arranged with each other.

[0008] In the lighting device disclosed in the present application, the lighting main body is open toward one side in the optical axis direction of the light source, and it is preferable that the second reflecting member is arranged on the one side in the optical axis direction with respect to the first reflecting member.

[0009] In the lighting device disclosed in the present application, it is preferable that the first reflecting member is annular in a plan view and has a first main body portion and a flat portion. The first main body portion preferably has a curved surface that extends toward the one side as it goes toward the outer side in the radial direction. The flat portion is formed at the inner peripheral edge of the first main body portion and preferably has a flat shape. The flat portion preferably overlaps with the outer end portion of the second reflecting member in the optical axis direction.

[0010] In the lighting device disclosed in the present application, it is preferable that the second reflecting member is annular in a plan view and has a second main body portion and a bent portion. The second main body portion preferably has a flat annular shape. The bent portion is formed at the outer peripheral edge of the second main body portion and is preferably bent so as to extend toward the one side as it goes toward the outer side in the radial direction. The bent portion preferably overlaps with the inner end portion of the first reflecting member in the optical axis direction.

[0011] In the lighting device disclosed in the present application, it is preferable that an insertion hole is formed in the second reflecting member, and a female screw portion is formed in the first reflecting member. It is preferable that a fastening screw is inserted through the insertion hole. It is preferable that the fastening screw inserted through the insertion hole is attached to the female screw portion.

[0012] In the lighting device disclosed in the present application, it is preferable that the insertion hole has an elongated hole extending in the circumferential direction in plan view.

[0013] In the lighting device disclosed in the present application, it is preferable that the insertion hole is disposed outside the irradiation range of the light from the light source in the second reflecting member.

[0014] The street lamp disclosed in the present application includes any one of the above lighting devices and a support member that supports the lighting body from below.

Advantages of the Invention

[0015] According to the lighting device and the street lamp according to the present invention, workability during maintenance of the light source can be ensured.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2A

Figure 2B

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12A

Figure 12B

Figure 12C

Figure 13

Figure 14

Figure 15

Mode for Carrying Out the Invention

[0017] <One Embodiment> Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and the description will not be repeated. Also, in the drawings, for ease of understanding, the X-axis, Y-axis, and Z-axis of the three-dimensional orthogonal coordinate system are appropriately shown. The X-axis and Y-axis are parallel to the horizontal direction, and the Z-axis is parallel to the vertical direction.

[0018] (1) Overall Configuration Referring to FIG. 1, a street lamp 100 including a lighting device 1 according to an embodiment of the present invention will be described. FIG. 1 is a perspective view of a street lamp 100 according to an embodiment. As shown in FIG. 1, the street lamp 100 includes a lighting device 1, a support member 2, and a power supply device 3 (see FIG. 2). A plurality of street lamps 100 are arranged at intervals along the roadside, for example.

[0019] Figure 2A is a diagram showing an overview of the configuration of the street lamp 100 shown in Figure 1. Figure 2B is a diagram showing an overview of the configuration of the support member 2 shown in Figure 1. As shown in Figure 2A and Figure 2B, the support member 2 is a member that supports the lighting device 1 from below. The support member 2 is composed of a hollow metal pole. The support member 2 extends in the vertical direction and its lower end is buried in the ground. The power supply device 3 is housed inside the support member 2. A lead wire 3A is connected to the power supply device 3.

[0020] The power supply device 3 is a driver that supplies power from an external power source to the lighting device 1. By an operator operating an external switch (not shown), the power supply device 3 can start or stop supplying power to the lighting device 1.

[0021] The lead wire 3A is a conductor (electric wire) that supplies power from an external power source to the lighting device 1 via the power supply device 3. The lead wire 3A connects the power supply device 3 and the external power source. Also, the lead wire 3A connects the power supply device 3 and the light source unit 30.

[0022] At a position corresponding to the power supply device 3 on the peripheral wall of the support member 2, an access hole 2A for an operator to access the power supply device 3 is formed. Around the access hole 2A on the peripheral wall, a power cover 2B that covers the access hole 2A is attached. The operator can perform various operations on the power supply device 3 by removing the power cover 2B from the support member 2.

[0023] (2) Configuration of the lighting device 1 Next, the configuration of the lighting device 1 will be described with reference to Figures 3 and 4. Figure 3 is a schematic longitudinal sectional view of the lighting device 1 shown in Figure 1. Figure 4 is a bottom view of the lighting device 1 shown in Figure 3.

[0024] As shown in FIG. 3, the lighting device 1 includes a lighting main body 10, an inner case 20, a light source unit 30, and an arm 40. The lighting device 1 emits light from a light source 31 of the light source unit 30. The optical axis Ax of the light source 31 extends along the vertical direction. In the following description, the direction orthogonal to the optical axis Ax in a plan view is referred to as the radial direction, and the direction of orbiting around the optical axis Ax is referred to as the circumferential direction.

[0025] (2-1) Structure of the lighting main body 10 The lighting main body 10 is a member that is attached to a support member 2 (see FIG. 2) via the arm 40 and covers the light source unit 30. The lighting main body 10 includes a case 11, a case frame 12, a base member 13, a bottom cover 14, and a chassis 15.

[0026] The case 11 is a member that forms the outer shape of the lighting main body 10. The case 11 opens downward and has a hemispherical shape with a hollow inside. The light source unit 30 and the inner case 20 are accommodated inside the case 11. The case 11 is made of a lightweight metal material such as an aluminum material.

[0027] The case frame 12 is a frame member that covers the opening of the case 11. The case frame 12 is attached to the inside of the lower end opening edge of the case 11 and extends over the entire circumference. The case frame 12 has an opening in the vertical direction. The case frame 12 is made of a metal material with a certain strength such as a stainless steel material.

[0028] The base member 13 is a member that connects the lighting main body 10 and the arm 40. The chassis 15 is attached to the base member 13. The base member 13 is made of, for example, an aluminum die-cast material. The detailed structure of the base member 13 and the connection structure between the base member 13 and the arm 40 will be described later.

[0029] The lower cover 14 is a member that covers the opening of the lighting main body 10. The lower cover 14 has a cover main body 14A and a cover frame 14B. As shown in FIG. 4, the lower cover 14 is attached to the base member 13 via a hinge 13A. In FIG. 4, the illustration of the cover main body 14A is omitted for the sake of explanation.

[0030] The lower cover 14 has a disk shape with a part cut out. The cover main body 14A shown in FIG. 3 is made of a material having light transmissivity such as an acrylic material. Fine irregularities may be formed on the light transmissive surface (front surface or back surface) of the cover main body 14A. Thereby, the light transmitted through the lower cover 14 can be diffused.

[0031] As shown in FIGS. 3 and 4, the cover frame 14B is a member that surrounds the cover main body 14A and covers the inside of the shade frame 12 and the hinge 13A in plan view. The cover main body 14A is attached to the base member 13 via a hinge 13A whose rotation axis extends in the horizontal direction. By rotating the lower cover 14 around the hinge 13A, the inside of the shade frame 12 and the hinge 13A can be opened and closed freely.

[0032] As shown in FIG. 3, the chassis 15 is a frame member that supports the shade 11, the shade frame 12, and the inner shade 20. The chassis 15 has an annular shape in plan view. The chassis 15 is located inside the shade frame 12 in the radial direction and is attached to the base member 13. An inner shade 20 is attached to the chassis 15. The chassis 15 is made of, for example, an SPC material (cold rolled steel sheet).

[0033] (2-2) Structure of the inner shade 20 The inner shade 20 is a member that covers the light source 31 in the light source unit 30 and reflects light emitted from the light source 31. The inner shade 20 has a circular shape as a whole in a plan view. The inner shade 20 is disposed coaxially with the optical axis Ax. The inner shade 20 has a first reflecting member 21 and a second reflecting member 22 (see FIG. 5). Both the first reflecting member 21 and the second reflecting member 22 are made of, for example, an SPC material (cold-rolled steel plate).

[0034] Next, the structure of the inner shade 20 will be described with reference to Fig. 5 to Fig. 7. Fig. 5 is a partially enlarged view of Fig. 3. Fig. 6 is a bottom view of the first reflecting member 21. Fig. 7 is a bottom view of the second reflecting member 22. For ease of understanding, the thicknesses of the first reflecting member 21 and the second reflecting member 22 are exaggerated in Fig. 5.

[0035] As shown in Fig. 5 and Fig. 6, the first reflecting member 21 is a member that reflects light emitted from the light source 31. The first reflecting member 21 is attached to the lighting body 10. The first reflecting member 21 has a circular ring shape in a plan view. The first reflecting member 21 has a first main body portion 21A, a flat portion 21B, and a flange portion 21C. The first main body portion 21A has a curved surface that extends downward as it moves radially outward. The curved surface is curved to have a convex shape toward the radially outward.

[0036] The flat portion 21B extends radially inward from the upper end of the first main body portion 21A. The flat portion 21B has a flat shape. As shown in FIG. 6, the flat portion 21B is formed on the inner peripheral edge of the first main body portion 21A. In plan view, the inside of the flat portion 21B is open. The flat portion 21B is formed with a female screw portion 21D to which a fastening screw is attached when attaching the second reflecting member 22. A plurality of the female screw portions 21D are arranged at equal intervals in the circumferential direction.

[0037] As shown in FIG. 5, the flange portion 21C extends radially outward from the lower end portion of the first main body portion 21A. The flange portion 21C has a flat shape. As shown in FIG. 6, the flange portion 21C is formed on the outer peripheral edge of the first main body portion 21A. An attachment hole 21E for attaching a fastening screw when attaching to the chassis 15 is formed in the flange portion 21C. A plurality of attachment holes 21E are arranged at equal intervals in the circumferential direction.

[0038] As shown in FIG. 5, the second reflecting member 22 is a member that reflects the light emitted from the light source 31. The light source unit 30 is attached to the second reflecting member 22. The second reflecting member 22 has a second main body portion 22A and a bent portion 22B. The second main body portion 22A has a flat annular shape. An opening for attaching the light source unit 30 is formed inside the first main body portion 21A.

[0039] As shown in FIG. 7, a connection hole 22F through which a fastening screw for fixing the light source unit 30 is inserted is formed at the radially inner end portion of the second main body portion 22A. A plurality of connection holes 22F are arranged at intervals in the circumferential direction.

[0040] As shown in FIG. 7, an insertion hole 22C through which a fastening screw for attaching to the first main body portion 21A is inserted is formed in the second main body portion 22A. The insertion hole 22C includes a long hole 22D and a round hole 22E. The long hole 22D extends in the circumferential direction and has a radial width dimension smaller than that of the round hole 22E. A plurality of insertion holes 22C are arranged at intervals in the circumferential direction at the radially outer end portion of the second main body portion 22A.

[0041] As shown in FIG. 5, the insertion hole 22C is arranged outside the irradiation range L of the light from the light source 31 in the second main body portion 22A. Here, the irradiation range L of the light from the light source 31 refers to the region irradiated before the light emitted from the light source 31 is first reflected by the inner shade 20. In other words, the irradiation range L of the light refers to the irradiation region of the illuminance angle (1 / 2 illuminance angle) of the light source 31. Therefore, it is difficult for the light from the light source 31 to reach the fastening screw, and unnecessary reflection in the fastening screw can be prevented.

[0042] The bent portion 22B of the second reflecting member 22 is formed on the outer peripheral edge of the second main body portion 22A and is bent so as to extend downward as it goes outward in the radial direction. The bent portion 22B is inclined along the inner surface of the first main body portion 21A of the first reflecting member 21.

[0043] And in this embodiment, in the inner casing 20, the second reflecting member 22 is detachably attached to the first reflecting member 21. Therefore, when maintaining the light source unit 30, the light source unit 30 can be removed from the first reflecting member 21 together with the second reflecting member 22. Thereby, workability during maintenance can be ensured.

[0044] Specifically, the first reflecting member 21 and the second reflecting member 22 overlap in the vertical direction and are arranged coaxially with the optical axis Ax. Therefore, the inner casing 20 composed of the first reflecting member 21 and the second reflecting member 22, both of which are annular members in plan view, can be formed into a shape symmetric with respect to the optical axis Ax, and the light emitted from the light source 31 can be uniformly reflected over the entire circumferential direction.

[0045] Also, the second reflecting member 22 is disposed below the first reflecting member 21. Therefore, the second reflecting member 22 to which the power supply unit is attached can be attached from below the first reflecting member 21, and workability of the attachment work of the first reflecting member 21 and the second reflecting member 22 can be ensured.

[0046] Further, the flat portion 21B of the first reflecting member 21 overlaps the outer end portion of the second main body portion 22A of the second reflecting member 22 in the vertical direction. And the bent portion 22B of the second main body portion 22A overlaps the inner end portion of the first main body portion 21A of the first reflecting member 21 in the vertical direction. For this reason, it becomes easier to align the positions of the second reflecting member 22 with respect to the first reflecting member 21 in the vertical direction and the radial direction. In this state, the fastening screw is attached to the female screw portion 21D formed on the flat portion 21B of the first main body portion 21A in a state of passing through the insertion hole 22C. Thereby, the first reflecting member 21 and the second reflecting member 22 can be firmly connected.

[0047] (2-3) Configuration of the light source unit 30 As shown in FIG. 3, the light source unit 30 includes a light source 31, a light source socket 32, and a radiator 33. The light source 31 receives power supply and emits light toward one side of the optical axis Ax.

[0048] A COB (Chip on Board) type LED light can be adopted for the light source 31. Note that an SMD (Surface Mount Device) type LED light may be adopted for the light source 31. The light source socket 32 holds the substrate on which the light source 31 is provided.

[0049] The radiator 33 is attached above the light source socket 32 and is a member that dissipates heat generated when the light source 31 emits light. A heat sink made of a metal material can be adopted for the radiator 33.

[0050] The light source unit 30 is arranged coaxially with the optical axis Ax. As shown in FIG. 5, the light source socket 32 of the light source unit 30 is fixed to the upper surface of the second main body portion 22A such that the light source 31 protrudes from the opening of the second main body portion 22A of the second reflecting member 22 to the inside of the inner socket 20. In this state, the light source 31 emits light toward the inside of the inner socket 20.

[0051] (2-4) Configuration of the arm 40 The arm 40 shown in FIG. 3 is a member that is connected to the support member 2 and supports the lighting main body 10. The arm 40 is composed of a hollow pipe member. The arm 40 has a connecting portion 41 and a support portion 42. The connecting portion 41 and the support portion 42 are integrally formed of, for example, an aluminum die-cast material. Inside the arm 40, a lead wire 3A extending from the power supply device 3 is laid.

[0052] The connecting portion 41 is a member that is connected to the support member 2. The lower end portion of the connecting portion 41 is connected to the upper end portion of the support member 2. The connecting portion 41 extends along the vertical direction and is arranged coaxially with the optical axis Ax. The support portion 42 is a member that supports the lighting main body 10. The support portion 42 is connected to the upper end portion of the connecting portion 41.

[0053] The support portion 42 is inclined so as to face outward in the radial direction as it goes upward. A lid 43 is provided on the outer side in the radial direction of the support portion 42. The lid 43 is opened and closed during work on the lead wire 3A laid inside the support portion 42. By opening the lid 43, an operator can access the lead wire 3A inside the support portion 42. The support portion 42 is connected to a base member 13 arranged on the outer side in the radial direction of the lighting main body 10.

[0054] (3) Support structure of the lighting main body 10 Next, with reference to FIGS. 8 to 10, the support structure of the lighting main body 10 by the arm 40 will be described. FIG. 8 is a bottom view of the base member 13 shown in FIG. 3. FIG. 9 is a top view and a front view of the upper end portion of the arm 40 shown in FIG. 3. FIG. 10 is a diagram for explaining the support structure of the lighting main body 10.

[0055] As shown in FIG. 8, the base member 13 is a member having an arcuate shape. The base member 13 is formed of, for example, an aluminum die-cast material. A hinge 13A is provided on the base member 13. A pair of hinges 13A are arranged at intervals in the horizontal direction on the side surface of the base member 13.

[0056] The base member 13 is formed with a laying hole 13B. The laying hole 13B is a countersunk hole having an inner seating surface facing downward. The laying hole 13B is in the shape of a long hole extending in a direction (first direction) orthogonal to the radial direction of the inner socket 20. A lead wire 3A is laid inside the laying hole 13B.

[0057] The base member 13 is formed with fixing holes 13C. The fixing holes 13C are countersunk holes having inner seating surfaces facing downward. A pair of fixing holes 13C are arranged so as to sandwich the laying hole 13B from both sides in the first direction. That is, the laying hole 13B and the two fixing holes 13C are arranged on a straight line along the first direction. Also, the distance between one fixing hole 13C and the laying hole 13B is equal to the distance between the other fixing hole 13C and the laying hole 13B.

[0058] As shown in FIG. 9, on the upper end surface of the support portion 42 of the arm 40, a boss 44 protruding upward is formed. The boss 44 includes a first boss 44A and a second boss 44B. Two first bosses 44A are provided and are inserted into the respective pair of fixing holes 13C. The first boss 44A is cylindrical.

[0059] The second boss 44B is inserted into the laying hole 13B. The second boss 44B is oblong cylindrical. The two first bosses 44A are arranged at positions sandwiching the second boss 44B. The first boss 44A and the second boss 44B are linearly arranged. Also, the distance between one first boss 44A and the second boss 44B is equal to the distance between the other first boss 44A and the second boss 44B.

[0060] As shown in FIG. 10, the chassis 15 of the lighting body 10 is attached to the arm 40 via the base member 13. The chassis 15, the base member 13, and the arm 40 are connected by an arm mounting bolt B inserted into the fixing hole 13C of the base in a state where they are arranged in this order from above downward.

[0061] One end of the first reflecting member 21 is fixed to the upper surface of the chassis 15. In this state, the first boss 44A of the connecting portion 41 in the arm 40 is inserted into the counterbored hole of the fixing hole 13C. Further, the second boss 44B of the connecting portion 41 is inserted into the counterbored hole of the laying hole 13B. Further, a lead wire (not shown) is laid inside the laying hole 13B.

[0062] And the lighting device 1 according to the present embodiment can change the posture of attaching the lighting main body 10 to the arm 40. FIG. 11 is a diagram showing another attachment posture of the lighting main body 10 to the arm 40. In the lighting device 1B shown in FIG. 11, the attachment posture of the lighting main body 10 to the arm 40 portion is different from that of the embodiment shown in FIG. 3.

[0063] In the illustrated example, from the state shown in FIG. 10, it is attached to the support portion 42 of the arm 40 in a state where the base member 13 is inverted in the radial direction. Here, the pair of fixing holes 13C and laying holes 13B are linearly arranged. Further, the distance between one fixing hole 13C and the laying hole 13B is equal to the distance between the other fixing hole 13C and the laying hole 13B. Therefore, even if the posture of the base member 13 is inverted with respect to the arm 40, the positional relationship between the pair of fixing holes 13C and the laying holes 13B with respect to the plurality of bosses 44 in the arm 40 does not change. Therefore, it can be attached to the arm 40 with the base member 13 inverted.

[0064] Then, by attaching the chassis 15 and the first reflecting member 21 to the base member 13, and further attaching the shade 11 and the third frame, as shown in FIG. 11, the lighting device 1B in a state where the direction of the lighting main body 10 with respect to the arm 40 is inverted can be obtained.

[0065] (4) Mounting procedure of the light source unit 30 Next, the mounting procedure of the light source unit 30 will be described. First, as shown in FIG. 10, in a state where the base member 13 and the chassis 15 are attached to the arm 40, the first reflecting member 21 is attached to the chassis 15. Then, the shade 11 and the shade frame 12 are attached to the chassis 15.

[0066] Next, as shown in FIG. 5, the second reflecting member 22 to which the light source unit 30 is attached is attached to the first reflecting member 21. At this time, first, the second reflecting member 22 is held at a position slightly separated from the first reflecting member 21. In a state where the second reflecting member 22 is held, caulking work is performed to electrically connect the conducting wire of the light source unit 30 and the lead wire 3A. In the caulking work, with the conducting wire and the lead wire 3A inserted into the insertion port of the connection terminal, the connection terminal is pressed and crimped.

[0067] Thereafter, the holding of the second reflecting member 22 is released, and the light source unit 30 is made to enter from the opening of the first reflecting member 21 so that the light source unit 30 is positioned inside the case 11, and the second reflecting member 22 is brought closer to the first reflecting member 21. Then, the circumferential positions of the insertion hole 22C of the second reflecting member 22 and the female screw portion 21D of the first reflecting member 21 are made to coincide.

[0068] At this time, after preliminarily attaching the fastening screw to the female screw portion 21D through the round hole 22E of the insertion hole 22C, the second reflecting member 22 may be displaced circumferentially with respect to the first reflecting member 21 so that the fastening screw moves inside the long hole 22D to perform alignment. Thereafter, the second reflecting member 22 is attached to the first reflecting member 21 by tightening the fastening screw.

[0069] On the other hand, for example, when removing the light source unit 30 from the illumination main body 10 for maintenance, it is not necessary to remove the entire inner case 20 fixed to the illumination main body 10. That is, the light source unit 30 can be removed from the illumination main body 10 by removing the second reflecting member 22 together with the light source unit 30 from the first reflecting member 21.

[0070] As described above, in the lighting device 1 according to the present embodiment, the first reflecting member 21 attached to the lighting main body 10 and the second reflecting member 22 to which the light source unit 30 is attached are detachably connected. Therefore, when maintaining the light source unit 30, the light source unit 30 can be removed from the first reflecting member 21 together with the light source unit 30. Thereby, workability during maintenance can be ensured.

[0071] Further, in the street lamp 100 provided with such a lighting device 1, for example, when the support member 2 is long and the lighting device 1 is located at a high place, it is particularly effective. That is, as described above, since workability during maintenance of the light source unit 30 is ensured, the work load of high-place work can be reduced.

[0072] (5) Modification Next, modifications of the first reflecting member 21 and the second reflecting member 22 will be described.

[0073] (5-1) First modification FIG. 12A is a diagram showing a first reflecting member 121 and a second reflecting member 122 according to the first modification. FIG. 12B is a bottom view of the first reflecting member 121 according to the first modification. FIG. 12C is a plan view of the second reflecting member 122 according to the first modification. In the first modification, the positional relationship between the first reflecting member 121 and the second reflecting member 122 is different from that of the above-described embodiment.

[0074] As shown in FIG. 12A, the first reflecting member 121 is disposed below the second reflecting member 122. The second reflecting member 122 is fixed in a state of being placed on the upper surface of the first reflecting member 121.

[0075] As shown in FIG. 12B, a notch portion 121B is formed in the first main body portion 121A of the first reflecting member 121. The notch portion 121B is formed so as to be recessed outward in the radial direction from the opening edge of the first main body portion 121A. A plurality of notch portions 121B are arranged at intervals in the circumferential direction. In the illustrated example, four notch portions 121B are arranged at equal intervals in the circumferential direction.

[0076] As shown in FIG. 12C, the second reflecting member 122 has an overall flat annular shape. A protruding portion 122A that protrudes radially outward is formed on the outer peripheral edge of the second reflecting member 122. A plurality of protruding portions 122A are arranged at intervals in the circumferential direction. In the illustrated example, four protruding portions 122A are arranged at equal intervals in the circumferential direction.

[0077] The outer shape of the second reflecting member 122 is smaller than the opening of the first reflecting member 121. Also, the protruding portion 122A of the second reflecting member 122 is smaller than the notch portion 121B of the first reflecting member 121. For this reason, the second reflecting member 122 can pass through the opening of the first reflecting member 121 by aligning the circumferential position of the protruding portion 122A with the position of the notch portion 121B of the first reflecting member 121.

[0078] A method of assembling the first reflecting member 121 and the second reflecting member 122 according to Modification 1 will be described. First, the light source unit 30 is attached to the second reflecting member 122. In that state, the second reflecting member 122 is brought closer to the first reflecting member 121 from below.

[0079] Then, while passing the protruding portion 122A through the notch portion 121B of the first reflecting member 121, the second reflecting member 122 is made to enter the inside of the case 11 and placed on the upper surface of the first reflecting member 121. After that, after aligning the position of the insertion hole 22G of the second reflecting member 122 with the position of the female screw portion 21D of the first reflecting member 121, the second reflecting member 122 is fixed to the first reflecting member 121 with a fastening member. Thus, the assembly of the first reflecting member 121 and the second reflecting member 122 according to Modification 1 is completed.

[0080] (5-2) Second Modification FIG. 13 is a view showing the first reflecting member 221 and the second reflecting member 222 according to the second modification. In the second modification, a part of the second reflecting member 222 is disposed above the first reflecting member 221. As shown in FIG. 13, in the second reflecting member 222 according to the second modification, the protruding portion 222A is bent. The protruding portion 222A has an intermediate portion extending in the vertical direction, so that the tip portion is located above the second reflecting member 222. Therefore, in the inner case 20 according to the second modification, a part of the second reflecting member 22 is disposed above the first reflecting member 21.

[0081] (5-3) Third Modification FIG. 14 is a view showing the first reflecting member 321 and the second reflecting member 322 according to the third modification. In the third modification, the second reflecting member 322 includes a locking piece 322A that can be locked to the opening of the first reflecting member 321. The locking piece 322A is connected to the outer peripheral edge of the second reflecting member 322 and extends in the vertical direction.

[0082] In the illustrated example, four locking pieces 322A are arranged at equal intervals in the circumferential direction on the outer peripheral edge of the second reflecting member 322. The locking piece 322A is a leaf spring and is elastically displaced in the horizontal direction, so that it can rotate in the horizontal direction with the base as the starting point.

[0083] In the inner case 20 according to the second modification, when the second reflecting member 322 is attached to the first reflecting member 321, all the locking pieces 322A are inserted into the opening of the first reflecting member 321 with the locking pieces 322A tilted radially inward. Then, by releasing the locking piece 322A, the locking piece 322A elastically returns and restores and varies radially outward, so that the locking piece 322A is locked to the opening edge of the first reflecting member 321. Thereby, the assembly of the first reflecting member 321 and the second reflecting member 322 according to the third modification is completed.

[0084] (6) Other Modifications Next, other modifications of the lighting device 1 will be described.

[0085] FIG. 15 is a diagram showing a lighting device 1C according to another modification. As shown in FIG. 15, the shape of the lighting main body 10C in the lighting device 1C can be arbitrarily changed. In the illustrated example, the shape of the shade 11C is different from that of the above-described embodiment. Specifically, the shade 11C according to this modification has a mortar shape. Also, the shade 11C may be rectangular in plan view.

[0086] Further, in the above-described embodiment, the configuration in which the conducting wire of the light source unit 30 and the lead wire 3A extending from the external power source are connected by caulking work is shown, but this is not the only case. For example, a connection terminal block may be attached to the outer surface of the light source unit 30, and the lead wire 3A may be connected to the connection terminal block by an insertion operation. In this case, compared with the case where caulking work is performed on the conducting wire and the lead wire 3A of the light source unit 30, the conducting operation to the light source unit 30 can be easily performed.

[0087] Also, in the above-described embodiment, the configuration in which the power supply device 3 is built in the support member 2 is shown, but this is not the only case. The power supply device 3 may be provided inside the lighting device 1. Specifically, the power supply device 3 may be housed inside the shade 11 in the lighting main body 10. In this case, the light source unit 30 may have a configuration having the power supply device 3 instead of the heat sink 33.

[0088] Also, in the above-described embodiment, the configuration in which the light source unit 30 includes the heat sink 33 is shown, but this is not the only case. Without the light source unit 30 including the heat sink 33, the main body portion of the second reflecting member 22 to which the light source unit 30 is attached may function as a heat radiating plate.

[0089] In the above-described embodiment, the configuration in which the lighting device 1 is a part of the street lamp 100 supported from below by the support member 2 is shown, but this is not the only case. The lighting device 1 includes a lighting main body 10, an inner shade 20, and a light source unit 30, and may be suspended from a ceiling or the like by a hanging member connected to the upper end portion of the shade 11. Also, the lighting device 1 may be embedded in a wall surface or the ground. That is, the direction of the optical axis Ax of the light emitted from the light source 31 can be arbitrarily changed.

[0090] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms without departing from the gist thereof. The drawings schematically show each component mainly for easy understanding, and the thickness, length, number, etc. of each illustrated component are different from the actual ones for convenience in drawing preparation. Also, the materials, shapes, dimensions, etc. of each component shown in the above embodiments are examples and are not particularly limited, and various changes or combinations are possible without substantially departing from the effects of the present invention.

[0091] (7) Supplementary Note The lighting device 1 included in the present invention is described in the supplementary note below.

[0092] (Supplementary Note 1) A light source unit having a light source that emits light, A first reflecting member that reflects the light emitted from the light source, A second reflecting member to which the light source unit is attached and that reflects the light emitted from the light source and the second reflecting member is detachably attached to the first reflecting member from one side in the optical axis direction of the light source, a lighting device.

Industrial Applicability

[0093] The present invention relates to a lighting device and a street lamp, and has industrial applicability.

Explanation of Reference Numerals

[0094] 1 Lighting device 2 Support member 10 Lighting main body 20 Inner case 21 First reflecting member 21A First main body portion 21B Flat portion 21C Flange portion 21D Female screw portion 22 Second reflecting member 22A Second main body portion 22B Bending portion 22C Insertion hole 22D Long hole 22E Round hole 30 Light source unit 40 Arm 100 Street lamp

Claims

1. A light source unit having a light source that emits light, An illumination body that covers the light source unit, A first reflecting member attached to the illumination body and reflecting the light emitted from the light source, A second reflecting member to which the light source unit is attached and reflecting the light emitted from the light source Comprising, The second reflecting member is detachably attached to the first reflecting member, an illumination device.

2. Both the first reflecting member and the second reflecting member are annular in plan view, overlap in the optical axis direction of the light source, and are coaxially arranged with each other. The illumination device according to claim 1.

3. The illumination body opens toward one side in the optical axis direction of the light source, The second reflecting member is disposed on the one side in the optical axis direction with respect to the first reflecting member. The illumination device according to claim 2.

4. The first reflecting member is annular in plan view, A first main body portion having a curved surface extending toward the one side as it goes toward the outer side in the radial direction, A flat portion formed on the inner peripheral edge of the first main body portion and presenting a flat shape Having, The flat portion overlaps with the outer end portion of the second reflecting member in the optical axis direction. The illumination device according to claim 3.

5. The second reflecting member is annular in plan view, A second main body portion presenting a flat annular shape, A bent portion formed on the outer peripheral edge of the second main body portion and bent so as to extend toward the one side as it goes toward the outer side in the radial direction Having, The bent portion overlaps with the inner end portion of the first reflecting member in the optical axis direction. The illumination device according to claim 4.

6. An insertion hole through which a fastening screw is inserted is formed in the second reflecting member, A female screw portion to which the fastening screw is attached is formed in the first reflecting member. The illumination device according to claim 5.

7. The insertion hole has a long hole extending in the circumferential direction in plan view. The illumination device according to claim 6.

8. The insertion hole is disposed outside the irradiation range of the light from the light source in the second reflecting member. The illumination device according to claim 6.

9. An illumination device according to any one of claims 1 to 8, A support member that supports the illumination device from below A street lamp provided with.

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