Lighting device

Abstract

To provide a lighting device capable of suppressing influence on a coupling part due to vibration.SOLUTION: A lighting device comprises: a light source unit having a light-emitting module and a terminal 18a electrically connected to the light-emitting module; a socket connected to and receiving the terminal 18a; and a vibration control member 300 covering the terminal 18a and the socket. The light source unit has an enlarged diameter part 18b in an area between the terminal 18a and the light-emitting module or in the terminal 18a, the enlarged diameter part 18b expanding in diameter as it approaches the light-emitting module. The vibration control member 300 covers at least a portion of the enlarged diameter part 18b.SELECTED DRAWING: Figure 12

Description

Technical Field

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

[0002] As lighting devices for roadways and the like, lamps such as fluorescent lamps, high-pressure mercury lamps, metal halide lamps, and sodium lamps are widely used.

[0003] Patent Document 1 discloses a road lighting device including a plurality of LED elements, a sub-lens that collects diffused light beams from the LED elements in the road width direction to emit a fan-shaped collected light beam that spreads along the road longitudinal direction, and a main lens that is provided below the sub-lens, emits the collected light beam collected by the sub-lens toward the lighting area, and refracts a part of the collected light beam along the road longitudinal direction to emit it toward the distal area in the lighting area.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] As a result of investigations by the present inventor, it has been found that when a lighting device is installed in an environment where vibrations occur, such as on a road, the vibrations affect the connecting portion of the lighting device. An example of the object of the present invention is to provide a lighting device capable of suppressing the influence on the connecting portion due to vibrations.

Means for Solving the Problems

[0006] According to the present invention, the following lighting device is provided.

[0007] [1] A light source unit having a light-emitting module and terminals electrically connected to the light-emitting module, A socket that connects to and receives the terminal, A vibration damping member that covers the terminal and the socket, and comprises, The light source unit has a diameter-expanded portion in the region between the terminal and the light-emitting module or on the terminal that expands in diameter as it approaches the light-emitting module, The vibration damping member is a lighting device that covers at least a part of the diameter-expanded portion. [2] Further comprising a housing that houses the light-emitting module and has the diameter-expanded portion, The housing has a first opening, The vibration damping member does not cover at least a part of the first opening, The lighting device according to [1]. [3] The first opening is provided in the diameter-expanded portion, The vibration damping member has a second opening that overlaps at least a part of the first opening, The lighting device according to [2]. [4] The housing further has a ventilation fan for ventilating the inside of the housing, The lighting device according to [2] or [3]. [5] The vibration damping member contains silicone rubber, The lighting device according to [1] or [2]. [6] The light source unit includes a CSP in which an LED is incorporated and packaged in a chip size, The lighting device according to [1] or [2]. [7] Installed on a highway, The lighting device according to [1] or [2].

Advantages of the Invention

[0008] According to the present invention, there is provided a lighting device capable of suppressing the influence on the connecting portion due to vibration.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0011] The lighting device 100 according to this embodiment will be described with reference to the drawings. FIG. 1 is an example of a plan view of the lighting device 100 according to this embodiment as viewed from below. Further, FIG. 2 is a cross-sectional view taken along the line A-A' of FIG. 1. FIG. 3 is a plan view of the lighting device 100 as viewed from above. FIG. 4 is a side view of the lighting device 100. The lighting device 100 is installed, for example, on a road. An example of this road is an automobile exclusive road such as a highway, but it is not limited thereto.

[0012] As shown in FIG. 1, the lighting device 100 includes a housing and a light source unit 10 housed in the housing. As shown in FIGS. 1 to 4, the housing has a lower main body case 101 and an upper main body case 102. By coupling these, as shown in FIG. 2, a space a for housing the light source unit 10 is formed inside. As shown in FIGS. 3 and 4, the upper main body case 102 further has a first case portion 102a located on the front side and a second case portion 102b located on the rear side in the direction in which light is radiated. In FIG. 1, the left side of the lighting device 100 faces the road side. Further, on the right side of the lighting device 100, a column coupling portion 103 for coupling to a column is provided.

[0013] As shown in FIGS. 1 and 2, a window portion 104 is provided on the lower surface 101b of the lower main body case 101. Thereby, the light from the light source unit 10 can be irradiated onto the road surface. The window portion 104 can be made of a light-transmitting material, for example, glass or resin. Here, the light-transmitting property means transmitting the light emitted by the light source unit 10. A large number of heat dissipation grooves 101a are formed on the side surface of the lower main body case 101.

[0014] Details of each component of the lighting device 100 will be described below.

[0015] [Light source unit 10] FIG. 5 is a perspective view of the light source unit 10. FIG. 6 is a perspective view of the light source unit 10 with the light distribution adjustment unit 14 removed and the light distribution adjustment unit 14. FIG. 7 is a cross-sectional view taken along line B-B' of FIG. 5. As shown in FIGS. 5 and 6, the light source unit 10 includes a light emitting module 12, a housing 11 that houses the light emitting module 12, and a light distribution adjustment unit 14 detachably provided on the housing 11. The one with the light distribution adjustment unit 14 attached to the housing 11 is substantially cylindrical. However, this shape is not limited to a cylindrical shape. The housing 11 includes a body portion 18 and a ventilation fan 19 provided at one end of the body portion 18. In addition, in order to ensure the air volume by the ventilation fan 19, that is, to control the air flow, the ventilation fan 19 is usually covered with a cover (not shown). The light source unit 10 also includes a terminal 18a for electrically connecting the light emitting module 12 to the other end of the body portion 18. The weight of the light source unit is, for example, 200 g or more and 1000 g or less.

[0016] [Body portion 18] As shown in FIGS. 5 and 6, the body portion 18 has a shape obtained by removing a portion corresponding to the light distribution adjustment unit 14 from a substantially cylindrical shape, and has a portion recessed radially inward at the central portion in the longitudinal direction. The bottom surface of the recessed portion constitutes a plane, and the light emitting module 12 is mounted (fixed) on this bottom surface. The length of the body portion 18 is, for example, 100 mm or more and 250 mm or less, and the width W of the recessed portion is, for example, 60 mm or more and 150 mm or less. And this recessed portion is covered by the light distribution adjustment unit 14.

[0017] The body portion 18 has an internal space, and as shown in FIG. 7, a heat sink 16 is provided in the internal space. The heat sink 16 has a plurality of fins and is in contact with the phosphor substrate of the light-emitting module 12. Further, a power supply drive circuit and a temperature sensor are provided in the internal space, and by the drive circuit controlling the drive of the ventilation fan 19, the inside of the light source unit 10 can be controlled within a desired temperature range.

[0018] The drive circuit includes an LED driver IC, a capacitor, etc., and controls the current flowing through the LED chip to a desired value by PWM (Pulse Width Modulation) - controlling the on - duty (off - duty) of the drive element Q in a switching operation.

[0019] Note that the body portion 18 can be made of resin or metal.

[0020] [Light distribution adjustment unit 14] The light distribution adjustment unit 14 is mounted so as to cover the light - emitting module 12 and has a convex shape outward from the light - emitting module 12 side. That is, the outer surface of the light distribution adjustment unit 14 has a shape that protrudes outward from the light - emitting module 12 side. The relationship between the outer surface and the inner surface of the light distribution adjustment unit 14 is arbitrary, but it is preferably a so - called concave lens shape. By doing so, the light emitted from the light - emitting module 12 can be diffused and emitted (irradiated) outward.

[0021] Examples of the shape of the light distribution adjustment unit 14 include curved shapes such as a dome shape, a cylindrical shape, and a Fresnel lens shape.

[0022] The light distribution adjustment unit 14 receives the emitted light from the light emitting module 12 and the like, and emits the received light to the outside. Examples of the light distribution adjustment unit 14 include a transparent cover, a transparent lens, and the like. The light distribution adjustment unit 14 can be made of a material that is transparent to the emission wavelength of the light emitting diode element (such as an LED). Examples of such a transparent material include thermoplastic resins, thermosetting resins, glass, and the like, and it is preferably highly heat-resistant so as to withstand the temperature rise inside the light source unit 10 due to the heat generated by the light emitting diode element.

[0023] Further, the light distribution adjustment unit 14 is detachable from the housing 11 of the light source unit 10. Specific means for configuring the light distribution adjustment unit 14 to be detachable include, for example, providing a claw portion (not shown) on the light distribution adjustment unit 14 and providing an engaging portion (not shown) formed of a notch, a recess, or a protrusion on the body portion 18 of the light source unit 10.

[0024] Also, the light distribution adjustment unit 14 is preferably a thermoplastic resin or a thermosetting resin from the viewpoint of moldability, and examples thereof include polycarbonate, polyimide, polyacrylate, polysulfone, polyallylsulfone, aromatic polyamide, aromatic polyetheramide, polyphenylene sulfide, polyallyl ether ketone, polyamideimide, liquid crystal polyester, polytetrafluoroethylene, and the like. The light distribution adjustment unit 14 can contain a diffusing agent, an ultraviolet absorber, an antioxidant, and the like. When the light distribution adjustment unit 14 is made of resin, it can be manufactured by injection molding, compression molding, transfer molding, casting molding, or the like.

[0025] [Terminal 18a] The terminal 18a has a thread 3 on its side surface, and thus can be screwed into the screw hole of the socket 200 provided on the side of the support coupling portion 103 inside the lower main body case 101. In this way, the light source unit 10 can be detachably mounted on the lower main body case 101, and further, the screwed terminal 18a is electrically connected to the light emitting module 12.

[0026] FIG. 8 shows an enlarged view of the body portion 18 on the terminal 18a side. As shown in FIG. 8, in the region between the terminal 18a of the body portion 18 and the light emitting module 12, there is a diameter-expanded portion 18b that expands in diameter as it approaches the light emitting module 12. The angle θ1 between the side surface of the diameter-expanded portion 18b and the longitudinal direction of the body portion 18 is preferably, for example, 60° or more and 80° or less, and 30° or more and 70° or less. Further, as shown in FIG. 8, the diameter-expanded portion 18b may have a first opening 1 for ventilating the inside of the housing 11. The first openings 1 may be arranged at equal intervals in the circumferential direction of the diameter-expanded portion 18b, or may be arranged irregularly. Also, from the viewpoint of ventilating the inside of the housing 11, it is preferable that the area of the first opening 1 is large, but in consideration of the mechanical strength of the housing 11, it is preferably 50% or more and 90% or less of the entire area of the diameter-expanded portion 18b.

[0027] FIG. 9 shows a state in which the terminal 18a is screwed into the socket 200. The socket 200 is provided, for example, in a state of being connected to a power source on the side of the support coupling portion 103 of the lower main body case 101. The socket 200 has a concave shape, and inside the concave shape, there is a screw hole for screwing with the thread 3 of the terminal 18a and is electrically connected to the screwed terminal 18a.

[0028] In this way, power is supplied to the light emitting module 12. However, a simple connection by screwing the terminal 18a and the socket 200 as shown in FIG. 9 is likely to become loose due to external vibration. The lighting device 100 according to the present embodiment can solve this problem by having a vibration damping member 300 described below.

[0029] [Vibration damping member 300] FIG. 10 is an example of the vibration damping member 300 viewed from the side. FIG. 11 is a view of the vibration damping member 300 viewed from the socket 200 side. As shown in FIG. 10, the vibration damping member 300 may have a socket covering portion 300a, a tapered portion 300b, and a body covering portion 300c. The socket covering portion 300a is a portion that covers at least a part of the socket 200, the tapered portion 300b is a portion that covers at least a part of the enlarged diameter portion 18b, and the body covering portion 300c is a portion that covers at least a part of the body 18. The socket covering portion 300a and the body covering portion 300c are substantially cylindrical. Also, the inner diameter of the socket covering portion 300a is smaller than the inner diameter of the body covering portion 300c. And the tapered portion 300b connecting these has a tapered shape. Note that the edge of the tapered portion 300b may be a curve or a straight line when viewed from the side as shown in FIG. 10.

[0030] The shape of the vibration damping member 300 is designed according to the sizes of the body 18, the enlarged diameter portion 18b, and the socket 200. The inner diameter W1 of the socket covering portion 300a is designed to be, for example, 0.7 times or more and 0.9 times or less the width of the socket 200, and the inner diameter W2 of the body covering portion 300c is designed to be, for example, 0.7 times or more and 0.9 times or less the width of the body 18. Thereby, the vibration damping member 300 can clamp the body 18, the enlarged diameter portion 18b, and the socket 200 and be attached in close contact. Also, the length T3 of the body covering portion 300c is preferably designed to be a length that does not overlap with the light distribution adjusting portion 14 when the vibration damping member 300 is attached. As specific values, for example, the length T1 of the socket covering portion 300a is 30 mm or more and 80 mm or less. Also, the length T3 of the body covering portion 300c is 10 mm or more and 30 mm or less. Also, the horizontal angle θ2 at the central portion in the height direction of the tapered portion 300b when viewed from the side is, for example, 25° or more and 80° or less.

[0031] FIG. 12 shows the connection part of the terminal 18a and the socket 200 having the vibration damping member 300. The lighting device 100 according to the present embodiment can suppress the loosening of the screwing of the terminal 18a and the socket 200 due to vibration by having the vibration damping member 300. Note that FIG. 12 shows the outer contour line of the vibration damping member 300, and it is preferable that the socket covering part 300a and the socket 200 are in close contact with each other, and it is preferable that the body covering part 300c and the body 18 are also in close contact with each other. Further, the tapered part 300b may also be in close contact with at least a part of the enlarged diameter part 18b.

[0032] Further, the thickness of the vibration damping member 300 is, for example, 2 mm or more and 6 mm or less. Also, as shown in FIG. 10, the edge portions of the socket covering part 300a and the body covering part 300c may be thicker than other regions.

[0033] Next, FIGS. 13 and 14 show modified examples of the vibration damping member 300. The vibration damping member 300 shown in FIG. 13 does not include the body covering part 300c. And the vibration damping member 300 covers only a part of the enlarged diameter part 18b and does not cover at least a part of the first opening 1. Thereby, while suppressing the loosening of the screwing of the terminal 18a and the socket 200, the inside of the housing 11 can be effectively ventilated.

[0034] The vibration damping member 300 shown in FIG. 14 has a second opening 2 and a connecting part 4 connecting the body 18 and the terminal 18a. And at least a part of the second opening 2 of the vibration damping member 300 overlaps at least a part of the first opening 1 of the enlarged diameter part 18b, so that while suppressing the loosening of the screwing of the terminal 18a and the socket 200, the inside of the housing 11 can be effectively ventilated. Note that it is preferable that the entire region of the first opening 1 of the enlarged diameter part 18b overlaps with the second opening 2 of the vibration damping member 300, but from the viewpoint of the mechanical strength of the vibration damping member 300, the connecting part 4 may be designed to overlap with a part of the first opening 1. The vibration damping member 300 is designed such that, for example, the area of the second opening 2 is 0.8 times or more and 1.2 times or less the area of the connecting part 4.

[0035] FIG. 15 is a schematic diagram showing the relationship between the first opening 1 and the second opening 2 in the enlarged diameter portion 18b shown in FIG. 14. In the example shown in FIG. 15, both the first opening 1 and the second opening 2 are trapezoidal. And, the maximum value T21 of the circumferential length of the second opening 2 is longer than the maximum value T11 of the circumferential length of the first opening 1, and the radial length T12 of the first opening 1 is longer than the radial length T22 of the second opening 2. However, the length T11 may be longer than the length T21, or the length T22 may be longer than the length T12. It is more preferable that the number of the second openings 2 corresponding to each first opening 1 is the same as the number of the first openings 1.

[0036] Moreover, the material constituting the vibration damping member 300 is not particularly limited as long as it has flexibility. For example, it is an elastomer such as fluororubber or silicone rubber.

[0037] Further, the vibration damping member 300 can be manufactured by molding the above-described material by a molding method such as a transfer molding method, a 3D printer, a RIM molding, or an injection molding.

[0038] [Attachment of Vibration Damping Member 300] Next, with reference to FIGS. 16 to 19, a method for attaching the vibration damping member 300 will be described. First, as shown in FIG. 16, the socket covering portion 300a of the vibration damping member 300 is arranged so as to cover the socket 300.

[0039] Next, as shown in FIG. 17, the vibration damping member 300 is wound back toward the socket 300 so that the inner surface of the vibration damping member 300 faces outward. For example, the portion located at the tapered portion 300b of the vibration damping member 300 is bent outward so that the inner surface of the body covering portion 300c faces outward. Note that the hatched portion in FIG. 17 indicates the inner surface of the vibration damping member 300.

[0040] Next, as shown in FIG. 18, screw thread 3 of terminal 18a is screwed into the screw hole of socket 300. Thereafter, as shown in FIG. 19, by returning the folded-back portion, vibration damping member 300 can be attached.

[0041] [Light emitting module 12] The light emitting module 12 is not particularly limited as long as it can emit light, and a fluorescent lamp, a high-pressure mercury lamp, a metal halide lamp, a sodium lamp, etc. can be used, but it is preferably composed of a phosphor substrate 20 and a plurality of light emitting elements (LED chips) 30 mounted on the phosphor substrate 20. In the following description, the light emitting module 12 will be described as being composed of a phosphor substrate 20 and a plurality of light emitting elements (LED chips) 30 mounted on the phosphor substrate 20.

[0042] FIG. 20 is a plan view of the light emitting module 12 viewed from a right angle direction, and FIG. 21 is a cross-sectional view taken along line D-D' in FIG. 20. As shown in FIG. 20, in the light emitting module 12, a plurality of light emitting elements 30 are arranged in a lattice pattern on the phosphor substrate 20. However, the arrangement of the light emitting elements 30 is not limited to a lattice pattern.

[0043] [Phosphor substrate 20] A plurality of light emitting elements 30 are arranged on the phosphor substrate 20. The phosphor substrate 20 serves to hold these. Further, as shown in FIG. 21, the phosphor substrate 20 includes a phosphor layer 21, a circuit pattern layer 22, an insulating layer 23, and a back surface pattern layer 24. These layers are laminated in this order from the surface side where the light emitting elements 30 are provided. The phosphor layer 21 is composed of a phosphor material and serves to emit light using the light emitted by the light emitting elements 30 as excitation light. Also, the circuit pattern layer 22 and the back surface pattern layer 24 are provided to supply power to the light emitting elements 30. The insulating layer 23 is composed of an insulating material, holds the above-described components, and prevents the circuit pattern layers 22 and the back surface pattern layers 24 from short-circuiting with each other.

[0044] [Phosphor layer 21] The phosphor layer 21 is formed so as to cover the circuit pattern layer 22. The phosphor layer 21 is formed, for example, on at least a part of a region excluding the region where the light-emitting element 30 of the circuit pattern layer 22 is disposed. In other words, the phosphor layer 21 is formed in a region around the region where the light-emitting element 30 of the circuit pattern layer 22 is disposed. Preferably, the phosphor layer 21 is formed in most of the above regions.

[0045] The phosphor layer 21 is composed of, for example, a phosphor and a binder, which will be described later. The phosphor contained in the phosphor layer 21 is fine particles held in a state of being dispersed in the binder, and has a property of exciting the light emission of the light-emitting element 30 as excitation light. The binder may be, for example, an epoxy-based, acrylate-based, silicone-based, etc., as long as it has the same insulation property as the binder contained in the solder resist.

[0046] As the phosphor contained in the phosphor layer 21 of the present embodiment, for example, one or a combination of two or more selected from an α-sialon phosphor containing Eu, a β-sialon phosphor containing Eu, a CASN phosphor containing Eu, and a SCASN phosphor containing Eu can be used. In addition to this, phosphors such as YAG, LuAG, BOS, and other visible light-excited phosphors may also be included.

[0047] The α-sialon phosphor containing Eu is represented by the general formula: M x Eu y Si 12-(m+n) Al (m+n) O n N 16-n In the above general formula, M is at least one element containing Ca selected from the group consisting of Li, Mg, Ca, Y, and lanthanide elements (excluding La and Ce). When the valence of M is a, ax + 2y = m, where 0 < x ≤ 1.5, 0.3 ≤ m < 4.5, and 0 < n < 2.25.

[0048] The β-sialon phosphor containing Eu is represented by the general formula: Si 6-z Al z Oz N 8-z (z = 0.005 to 1) A phosphor in which divalent europium (Eu 2+ ) is dissolved as a luminescence center in β - sialon represented by

[0049] Also, examples of nitride phosphors include CASN phosphors containing Eu, SCASN phosphors containing Eu, etc.

[0050] The CASN phosphor containing Eu (an example of a nitride phosphor) is represented by, for example, the formula CaAlSiN3:Eu 2+ and is a red phosphor having a crystal composed of alkaline earth silicon nitride as a matrix with Eu 2+ as an activator. In the definition of the CASN phosphor containing Eu in this specification, the SCASN phosphor containing Eu is excluded.

[0051] The SCASN phosphor containing Eu (an example of a nitride phosphor) is represented by, for example, the formula (Sr,Ca)AlSiN3:Eu 2+ and is a red phosphor having a crystal composed of alkaline earth silicon nitride as a matrix with Eu 2+ as an activator.

[0052] <Circuit pattern layer 22, back surface pattern layer 24> The circuit pattern layer 22 according to this embodiment is a conductive layer formed on the surface side of the insulating layer 23, and the back surface pattern layer 24 is a conductive layer provided on the back surface side of the insulating layer 23. The materials constituting the circuit pattern layer 22 and the back surface pattern layer 24 are not particularly limited as long as they have conductivity, and for example, they are copper.

[0053] Note that the region where the circuit pattern layer 22 is disposed on the surface of the insulating layer 23 is, for example, 60% or more of the area of the surface of the insulating layer 23.

[0054] <Insulating layer 23> The insulating layer 23 according to this embodiment holds each component and plays a role of preventing short circuits between each circuit pattern layer 22 and each back surface pattern layer 24. The material constituting the insulating layer 23 is not particularly limited as long as it has insulating properties. For example, an insulating material such as a prepreg obtained by impregnating a resin such as a bismaleimide resin into a fiber base material such as glass cloth can be used.

[0055] [Light-emitting element 30] The light-emitting element 30 includes general light-emitting elements such as fluorescent lamps and LEDs, and a CSP (Chip Scale Package) incorporating a flip-chip LED 32 (hereinafter referred to as LED 32) is particularly preferable (see FIG. 21). As the CSP, as shown in FIG. 21, it is preferable that the entire circumference (five surfaces) except the bottom surface of the LED 32 is covered with a phosphor encapsulation layer 31 containing a phosphor. When covered with the phosphor encapsulation layer 31, the light of the LED 32 is color-converted by the phosphor in the phosphor encapsulation layer 31 and irradiated to the outside.

[0056] [Light-emitting operation of the light-emitting module 12] Next, the light-emitting operation of the lighting device 10 for plant cultivation according to this embodiment will be described with reference to FIG. 22.

[0057] First, when an operation switch (not shown) for operating a plurality of light-emitting elements 30 is turned on, power supply from an external power source (not shown) to the circuit pattern layer 22 is started via a connector (not shown), and the plurality of light-emitting elements 30 emit light L radially, and a part of the light L reaches the phosphor layer 21 of the phosphor substrate 20. Hereinafter, the behavior of the light L will be described by dividing it into the traveling directions of the emitted light L.

[0058] A part of the light L emitted from each light-emitting element 30 is emitted to the outside without entering the phosphor layer 21. In this case, the wavelength of the light L remains the same as the wavelength of the light L when it is emitted from each light-emitting element 30.

[0059] Also, a part of the light L emitted from the light-emitting element 30 enters the phosphor layer 21. Here, the "part of the light L" includes the light that has not been color-converted by the phosphor (phosphor encapsulation layer 31) of the light-emitting element 30, that is, the light of the LED 32 itself (for example, light having a blue color (wavelength near 470 nm)). When a part of the light L emitted from the light-emitting element 30 collides with the phosphor dispersed in the phosphor layer 21, the phosphor is excited and emits light. Along with this, a part of the energy of the light L is used for the excitation of the phosphor, so that a part of the energy of the light L is lost. As a result, the wavelength of the light L is converted (wavelength conversion is performed). For example, depending on the type of phosphor in the phosphor layer 21 (for example, when red CASN is used for the phosphor), the wavelength of the light L becomes longer (for example, 650 nm or the like). Also, some of the light emitted by the excitation of the phosphor layer 21 is emitted from the phosphor layer 21 as it is, but some of the light travels toward the lower circuit pattern layer 22. And some of the light is emitted to the outside by reflection in the circuit pattern layer 22. As described above, when the wavelength of the light due to the excitation of the phosphor in the phosphor layer 21 is 600 nm or more, a reflection effect can be expected even if the circuit pattern layer 22 is made of Cu. Note that depending on the type of phosphor in the phosphor layer 21, the wavelength of the light L is different from the above example, but in any case, the wavelength conversion of the light L is performed. For example, when the wavelength of the light emitted by the excitation of the phosphor layer 21 is less than 600 nm, a reflection effect can be expected by making the circuit pattern layer 22 or its surface, for example, Ag (plating). Or, even if a white reflection layer is provided on the lower side (insulating layer 23 side) of the phosphor layer 21, a similar effect can be expected. The reflection layer is formed of, for example, a white paint such as a titanium oxide filler.

[0060] By the above operation, the light emitted from the light-emitting module 12 is irradiated from the lighting device 100 via the light distribution adjustment unit 14.

[0061] As described above, the embodiments of the present invention have been described with reference to the drawings, but these are examples of the present invention, and various configurations other than the above can also be adopted.

[0062] As described above, since the lighting device 100 according to the present embodiment has the vibration damping member 300 at the connecting portion of the screw portion 18a and the socket 200, the influence on the connecting portion due to vibration can be suppressed.

Example

[0063] Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the descriptions of these examples at all.

[0064] [Manufacture of the Vibration Damping Member 300] The vibration damping member 300 shown in FIG. 11 was manufactured by molding silicone rubber using a 3D printer. The respective dimensions are as follows. · T1: 34.5 · T2: 37 · T3: 21.5 · W1: 53 · W2: 82 · Average thickness: 2 - 3 mm

[0065] [Evaluation] Next, a comparison example was prepared by directly attaching an LED lamp (manufactured by CS Co., Ltd., Retro Fit LED Lamp) to the socket, and an example was prepared by attaching the LED lamp to the socket using the manufactured vibration damping member 300. Then, with the socket fixed, vibration with a frequency of 800 times / minute and an amplitude of 3 mm was applied to the example and the comparison example for 5 minutes to check for loosening of the screwing between the LED lamp and the socket. As a result, in the comparison example, the LED lamp had rotated by about 90 degrees, whereas in the example, no loosening of the screwing was confirmed. Furthermore, it was confirmed that the example could light up normally even after the vibration was applied.

[0066] As described above, according to the present invention, it was confirmed that a lighting device capable of suppressing the influence on the connecting portion due to vibration is provided.

[0067] Although the embodiments and examples of the present invention have been described with reference to the drawings, these are examples of the present invention, and various configurations other than the above can also be adopted.

Description of Symbols

[0068] 100 Lighting device 101 Lower body case 101a Groove 102 Upper body case 102a First case part 102b Second case part 103 Support connection part 104 Window part 10 Light source unit 11 Body 12 Light emitting module 14 Light distribution adjustment part 14a Light receiving surface 14b Light emitting surface 16 Heat sink 18 Barrel part 18a Screw part 19 Ventilation fan 20 Phosphor substrate 21 Phosphor layer 22 Circuit pattern layer 23 Insulation layer 24 Back surface pattern layer 30 Light emitting element 32 LED

Claims

1. A light-emitting module and a light source unit having terminals electrically connected to the light-emitting module, A socket that is connected to the terminal and receives the terminal, A vibration damping member that covers the terminal and the socket, comprising, The light source unit has a region between the terminal and the light-emitting module, or an enlarged diameter portion that enlarges in diameter as it approaches the light-emitting module on the terminal, The lighting device in which the vibration damping member covers at least a part of the enlarged diameter portion.

2. Further comprising a housing that houses the light-emitting module and has the enlarged diameter portion, The housing has a first opening, The vibration damping member does not cover at least a part of the first opening, The lighting device according to claim 1.

3. The first opening is provided in the enlarged diameter portion, The vibration damping member has a second opening that overlaps at least a part of the first opening, The lighting device according to claim 2.

4. The housing further has a ventilation fan for ventilating the inside of the housing, The lighting device according to claim 2 or 3.

5. The vibration damping member contains silicone rubber, The lighting device according to claim 1 or 2.

6. The light source unit includes a CSP in which an LED is incorporated and packaged in a chip size, The lighting device according to claim 1 or 2.

7. Installed on a highway, The lighting device according to claim 1 or 2.

Images