CN107850277B

CN107850277B - Power supply unit for lighting and lighting device

Info

Publication number: CN107850277B
Application number: CN201680045480.0A
Authority: CN
Inventors: 佐藤典文; 大野彰久; 田边快全; 大泽隆司; 泽田拓郎
Original assignee: Mitsubishi Electric Corp; Mitsubishi Electric Lighting Corp
Current assignee: Mitsubishi Electric Corp; Mitsubishi Electric Lighting Corp
Priority date: 2015-08-04
Filing date: 2016-08-02
Publication date: 2020-08-18
Anticipated expiration: 2036-08-02
Also published as: CN107850277A; WO2017022773A1

Abstract

A power supply unit (300) of an illumination device (100) is provided with a power supply substrate (310), an output wire (320), a housing (330), and a housing (370). The housing (370) has a first housing portion and a second housing portion. The first housing portion houses a power supply board (310). The second receiving part is separated from the first receiving part (371) by a partition wall. A housing (370) is housed inside the case (330). A bottom wall portion (332) of the case (330) is provided with a through hole (333) through which the output wire (320) is inserted from the inside of the case (330) to the outside of the case (330). The light source unit (200) is connected to the bottom wall section (332) from the outside of the housing (330). The output wire (320) enters the second housing part from the first housing part over the partition wall, and extends from the second housing part to the outside of the housing (370) and the case (330) through a through hole provided in the bottom wall of the second housing part and a through hole (333) provided in the bottom wall part (332).

Description

Power supply unit for lighting and lighting device

Technical Field

The present invention relates to a power supply unit for illumination and an illumination device.

Background

Some of downlight (down light) type illumination devices used by being embedded in a ceiling use LEDs as light sources (see, for example, patent document 1).

Some bulb-type lighting devices used by being attached to a fixture include lighting devices using LEDs as light sources (see, for example, patent document 2).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2012 and 74134

Patent document 2: japanese patent laid-open publication No. 2011-108590

Disclosure of Invention

Problems to be solved by the invention

In a conventional downlight type lighting device, the fin member is formed of an aluminum alloy or the like integrally with or as a part of the main body. Therefore, even when the specification of the fin member is changed according to the application of the lighting device, the specification of the main body must be changed, and there is a problem that it is difficult to cope with various demands.

On the other hand, in the conventional bulb-type lighting device, the cooling fin portion is attached to the outer peripheral surface of the cylindrical main body. Therefore, only the specification of the cooling fin portion can be changed according to the application of the lighting device without changing the specification of the cylindrical main body. However, in the conventional bulb-type lighting device, a support member is fixed by caulking to an outer peripheral portion of one end of the cylindrical body, and the LED module is fixed to the support member via a support base. Therefore, there are problems as follows: in the process of transferring heat generated by the LED from the support base to the support member, the tubular body, and the cooling fin portion, the amount of heat transfer is reduced due to thermal resistance generated at the caulking-fixed portion between the tubular body and the support member.

In addition, in both of the conventional downlight type lighting device and the bulb type lighting device, the power supply board for lighting the LED is directly housed in the main body or the tubular main body. Therefore, it is necessary to secure a space in the main body or the cylindrical body to allow installation of the power supply board and wiring work, and there is a problem that it is difficult to miniaturize the lighting device.

The invention aims to improve the heat dissipation of a lighting device or realize the miniaturization of the lighting device.

Means for solving the problems

A power supply unit for illumination according to an aspect of the present invention is a power supply for illumination for supplying lighting power to a light source unit in which a light source circuit including a light emitting element is arranged,

the power supply unit for illumination includes:

a power supply substrate provided with a lighting circuit;

a housing body having a first housing portion housing the power supply substrate and a second housing portion partitioned from the first housing portion by a partition wall;

a housing having a cylindrical peripheral wall portion and a bottom wall portion that closes one end of the peripheral wall portion, the housing accommodating the accommodating body therein, the light source unit being connectable to the bottom wall portion from outside the housing; and

and an output wire that enters the second storage portion from the first storage portion across the partition wall, and that extends from the second storage portion to the outside of the storage body and the housing through a through hole provided in a bottom wall of the second storage portion and a through hole provided in the bottom wall portion, the output wire electrically connecting the lighting circuit and the light source circuit and serving as an output path through which lighting power is output from the lighting circuit to the light source circuit.

Effects of the invention

In the present invention, since the space for accommodating the power supply board and the space for accommodating the output wires are respectively secured in the accommodating bodies accommodated inside the housing of the power supply unit, the power supply unit can be applied to the illumination device, thereby realizing a reduction in size of the illumination device.

Drawings

Fig. 1 is a perspective view of a lighting device according to embodiment 1.

Fig. 2 is an exploded perspective view of the lighting device of embodiment 1.

Fig. 3 is an exploded perspective view of the lighting device of embodiment 1.

Fig. 4 is a diagram showing an installation example of the lighting device according to embodiment 1.

Fig. 5 is a perspective view of a housing of a power supply unit of the lighting device of embodiment 1.

Fig. 6 is a perspective view of a housing of a power supply unit of the lighting device of embodiment 1.

Fig. 7 is a side view of the case and the heat sink of the power supply unit of the lighting device of embodiment 1.

Fig. 8 is a sectional view of a case and heat sink of a power supply unit of the lighting device of embodiment 1.

Fig. 9 is a diagram showing a connection portion between a case and a heat sink of a power supply unit of the lighting device according to embodiment 1.

Fig. 10 is a perspective view of the housing of the power supply unit, the output wires, and the input wires of the lighting device according to embodiment 1.

Fig. 11 is a perspective view of a housing of a power supply unit of the lighting device according to embodiment 1.

Fig. 12 is a perspective view of a housing of a power supply unit of the lighting device according to embodiment 1.

Fig. 13 is a perspective view of a housing of a power supply unit of the lighting device according to embodiment 1.

Fig. 14 is a diagram showing alignment of the housing and the case of the power supply unit, the plate-like member of the light source unit, the insulating sheet, and the light source substrate in the lighting device according to embodiment 1.

Fig. 15 is a perspective view of a plate-like member of a power supply unit and a light source unit of the lighting device according to embodiment 1.

Fig. 16 is a perspective view of a reflector of a light source unit of the lighting device according to embodiment 1.

Fig. 17 is a perspective view of a power supply unit and a light source unit of the lighting device of embodiment 1.

Fig. 18 is a diagram showing a procedure of attaching a frame to the light source unit of the illumination device according to embodiment 1.

Fig. 19 is a diagram showing a procedure of attaching a frame to the light source unit of the illumination device according to embodiment 1.

Fig. 20 is a perspective view of a cover and a terminal block of a power supply unit of an illumination device according to embodiment 2.

Fig. 21 is a partial plan view of a power supply unit of the lighting device according to embodiment 2.

Fig. 22 is a perspective view of a cover and a terminal block of a power supply unit of an illumination device according to embodiment 3.

Fig. 23 is a partial plan view of a power supply unit of the lighting device according to embodiment 3.

Fig. 24 is a side view of the lighting device of embodiment 4.

Fig. 25 is a perspective view of a heat sink of a power supply unit of the lighting device according to embodiment 4.

Fig. 26 is a perspective view of a heat sink of the power supply unit of the lighting device according to embodiment 4.

Fig. 27 is a side view of a housing and a heat sink of a power supply unit of a lighting device of embodiment 4.

Fig. 28 is a sectional view of a case and heat sink of a power supply unit of a lighting device according to embodiment 4.

Fig. 29 is a perspective view of a case and heat sink of a power supply unit of a lighting device according to embodiment 5.

Fig. 30 is a perspective view of a case and heat sink of a power supply unit of a lighting device according to embodiment 6.

Fig. 31 is a perspective view of a heat sink of a power supply unit of the lighting device according to embodiment 6.

Fig. 32 is a perspective view of a case and heat sink of a power supply unit of a lighting device according to embodiment 7.

Fig. 33 is a perspective view of a fin of a heat sink of a power supply unit of the lighting device according to embodiment 7.

Fig. 34 is a perspective view of a lighting device according to embodiment 8.

Fig. 35 is a diagram showing an installation example of the lighting device according to embodiment 8.

Fig. 36 is a perspective view of a lighting device according to embodiment 9.

Fig. 37 is a perspective view of a lighting device according to embodiment 9.

Fig. 38 is a perspective view of a cover and a terminal block of a power supply unit of an illumination device according to embodiment 10.

Fig. 39 is a plan view of a power supply unit of the lighting device according to embodiment 10.

Fig. 40 is a partial perspective view of the housing of the power supply unit, the output wires, and the input wires of the lighting device according to embodiment 11.

Fig. 41 is a partial perspective view of the housing of the power supply unit, the output wires, and the input wires of the lighting device according to the modification of embodiment 11.

Fig. 42 is a partial perspective view of the housing of the power supply unit, the output wires, and the input wires of the lighting device according to the modification of embodiment 11.

Fig. 43 is a partial perspective view of the housing of the power supply unit, the output wires, and the input wires of the lighting device according to embodiment 12.

Fig. 44 is a partially exploded perspective view of a housing of a power supply unit of an illumination device according to embodiment 12.

Fig. 45 is a perspective view of a bridge portion of a housing body of a power supply unit of an illumination device according to a modification of embodiment 12.

Fig. 46 is a partial perspective view of a housing of a power supply unit, an output wire, and an input wire of an illumination device according to embodiment 13.

Fig. 47 is a partially exploded perspective view of a housing of a power supply unit of an illumination device according to embodiment 13.

Fig. 48 is a partial perspective view of the housing of the power supply unit, the output wires, and the input wires of the lighting device according to embodiment 14.

Fig. 49 is a partially exploded perspective view of a housing of a power supply unit of an illumination device according to embodiment 14.

Fig. 50 is a perspective view of the housing of the power supply unit, the output wires, and the input wires of the lighting device according to embodiment 15.

Fig. 51 is a perspective view of a housing of a power supply unit of an illumination device according to embodiment 15.

Fig. 52 is a perspective view of a housing of a power supply unit of an illumination device according to embodiment 15.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals. In the description of the embodiments, the description of the same or corresponding portions will be omitted or simplified as appropriate. In the description of the embodiments, the arrangement, orientation, and the like of "up", "down", "left", "right", "front", "rear", "front", and "back" are described for convenience of description only, and are not intended to limit the arrangement, orientation, and the like of devices, appliances, accessories, and the like. The structure of the device, the appliance, the accessory, and the like can be appropriately changed in terms of material, shape, size, and the like within the scope of the present invention.

Embodiment 1.

The structure of the device of the present embodiment and the effects of the present embodiment will be explained in order.

Description of the structure of Tuliuzhang

The configuration of an illumination device 100 as a device of the present embodiment will be described with reference to fig. 1, 2, and 3.

The illumination device 100 includes a light source unit 200 and an illumination power supply unit 300 that supplies lighting power to the light source unit 200.

The light source unit 200 has a light source substrate 210, a plate-shaped member 220, an insulation sheet 230, a reflection plate 240, and a diffusion plate 250.

A light emitting element 211 as an LED is mounted on the light source substrate 210. That is, a light source circuit including the light emitting element 211 is disposed on the light source substrate 210. The number of the light-emitting elements 211 may be any number, and in the present embodiment, is 26. The light-emitting element 211 may be a solid-state light-emitting element other than an LED, such as an organic EL or a laser. The light-emitting element 211 may not be mounted on the light source substrate 210, and a light source circuit including the light-emitting element 211 may be disposed in the light source unit 200.

The plate member 220 has 2 plate surfaces 221 and 222 as the front surface and the back surface, respectively. The light source substrate 210 is fixed to one plate surface 221. That is, the light source circuit including the light emitting element 211 is disposed on the one plate surface 221. The other plate surface 222 is connected to the power supply unit 300.

In the present embodiment, the insulating sheet 230, the light source substrate 210, the reflecting plate 240, and the diffusing plate 250 are sequentially stacked on one plate surface 221 of the plate member 220. The plate member 220, the insulating sheet 230, the reflecting plate 240, and the diffusing plate 250 have screw holes at a plurality of corresponding positions. The screws are inserted into the screw holes of the plate member 220 through the screw holes of the diffusion plate 250, the reflection plate 240, and the insulation sheet 230 in this order, and fastened, whereby the insulation sheet 230, the reflection plate 240, and the diffusion plate 250 are fixed to the plate member 220. The light source substrate 210 is sandwiched and fixed between the insulating sheet 230 and the reflection plate 240. The light source substrate 210 may be provided with screw holes. In this case, the screws are inserted into the screw holes of the plate-shaped member 220 through the screw holes of the diffusion plate 250, the reflection plate 240, the light source substrate 210, and the insulation sheet 230 in this order.

The plate-like member 220 is formed of a thermally conductive material. In the present embodiment, the plate-like member 220 is integrally formed of a metal material.

The insulating sheet 230 is sandwiched between the plate-shaped member 220 and the light source substrate 210 to electrically insulate the light source substrate 210 from the plate-shaped member 220.

The reflective plate 240 is provided with a circular opening 241 for exposing the light emitting element 211. The reflecting plate 240 reflects light from the light emitting element 211 with the inner peripheral surface of the opening 241.

The diffusion plate 250 is formed of a light-transmissive material. The diffusion plate 250 transmits light directly emitted from the light emitting element 211 and light reflected by the reflection plate 240 while diffusing the light.

The power supply unit 300 includes a power supply board 310, an output cable 320, a case 330, a cover 340, a terminal block 350, an input cable 360, a housing 370, and a cylindrical heat sink 390.

A lighting circuit 311 is disposed on the power supply substrate 310.

The output wire 320 electrically connects the power supply substrate 310 and the light source substrate 210, and serves as an output path through which lighting power is output from the lighting circuit 311 to the light source circuit including the light emitting element 211. That is, the output wire 320 electrically connects the lighting circuit 311 disposed on the power supply substrate 310 and the light source circuit disposed on the light source substrate 210, and serves as an output path through which lighting power is output from the lighting circuit 311 to the light source circuit.

The case 330 has a bottom wall portion 332 and a cylindrical peripheral wall portion 331. The bottom wall portion 332 is integrally formed with the peripheral wall portion 331. The bottom wall portion 332 closes one end of the peripheral wall portion 331. A housing space for housing the power supply board 310 is formed inside the housing 330. The housing 330 is configured to be able to mount the light source unit 200 to the bottom wall portion 332 from the outside. The bottom wall 332 is provided with a through hole 333 for inserting the output wire 320 from the inside of the case 330 to the outside of the case 330. In the present embodiment, the light source unit 200 is coupled to the bottom wall portion 332 from the outside of the case 330. Specifically, the other plate surface 222 of the plate member 220 is connected to the bottom wall portion 332.

Since the case 330 is configured as described above, heat generated from the light source unit 200 during lighting of the light emitting element 211 is conducted from the connection portion between the bottom wall portion 332 and the light source unit 200 to the peripheral wall portion 331 via the bottom wall portion 332, and is dissipated. In the present embodiment, since the peripheral wall 331 and the bottom wall 332 are integrally formed, thermal resistance is less likely to occur between the peripheral wall 331 and the bottom wall 332. Therefore, heat generated by the LEDs can be efficiently transmitted from the light source unit 200 to the bottom wall portion 332 and the peripheral wall portion 331.

The lid 340 closes the other end of the peripheral wall 331. The cover 340 is formed of a thermally conductive material. In the present embodiment, the lid 340 is integrally formed of a metal material.

The terminal block 350 is connected to an external power supply such as a commercial power supply not shown. The terminal block 350 is fixed to the cover 340 from the outside of the case 330.

The input wire 360 electrically connects the power supply substrate 310 and the terminal block 350, and serves as an input path for lighting power from an external power supply to the lighting circuit 311.

The case 330 has a flange portion 334 in addition to the peripheral wall portion 331 and the bottom wall portion 332 described above. The flange portion 334 is integrally formed with the peripheral wall portion 331, similarly to the bottom wall portion 332. The flange portion 334 protrudes from the other end of the peripheral wall portion 331 perpendicularly to the central axis direction of the peripheral wall portion 331. That is, the flange portion 334 protrudes from the other end of the peripheral wall portion 331 in the radial direction of the peripheral wall portion 331. The peripheral wall 331 is provided with a notch 335 for passing the input wire 360 from the outside of the housing 330 to the inside of the housing 330. The lid 340 is coupled to the flange portion 334. In addition, in place of the notch 335, a through hole may be provided in the peripheral wall 331 so as to allow the input wire 360 to pass therethrough. The position and number of the flange portions 334 may be any position and number, and in the present embodiment, the flange portions 334 are provided at 2 positions facing each other in the radial direction of the peripheral wall portion 331. Therefore, the number of the flange portions 334 is 2.

Since the case 330 is configured as described above, heat generated from the light source unit 200 during lighting of the light emitting element 211 is conducted from the connection portion between the bottom wall portion 332 and the light source unit 200 to the connection portion between the flange portion 334 and the lid 340 through the bottom wall portion 332, the peripheral wall portion 331, and the flange portion 334, and is dissipated. In the present embodiment, since the peripheral wall portion 331 and the flange portion 334 are integrally formed, thermal resistance is less likely to occur between the peripheral wall portion 331 and the flange portion 334. Therefore, heat generated by the LED can be efficiently transmitted from the light source unit 200 to the bottom wall portion 332, the peripheral wall portion 331, the flange portion 334, and the lid 340.

The housing 330 is formed of a thermally conductive material. In the present embodiment, the housing 330 is integrally formed of a metal material. Specifically, the case 330 is formed into a cup shape by drawing a single metal plate. The housing 330 may be manufactured by a method other than drawing such as die casting.

As a modification of the present embodiment, a vent hole may be provided in each of the bottom wall portion 332 and the peripheral wall portion 331, or a vent hole may be provided in each of the bottom wall portion 332 and the lid 340. In this case, a ventilation path is formed inside the housing 330 from one of the ventilation holes to the other. This causes convection, thereby improving heat dissipation of the case 330. The through hole 333 provided in the bottom wall portion 332 may also serve as a vent hole. The notch 335 provided in the peripheral wall portion 331 may also serve as a vent hole.

The housing 370 is housed inside the case 330. The accommodating body 370 accommodates the power substrate 310. As described above, in the present embodiment, the power supply board 310 is not directly accommodated in the accommodation space formed inside the case 330 but accommodated via the accommodation body 370. Therefore, the housing 330 only needs to have a space for installing the housing 370, and thus a space for installation is not required.

The container 370 is made of an insulating material. In the present embodiment, the housing 370 is integrally molded from a resin material.

The heat sink 390 is fixed to the peripheral wall 331 from the outside of the case 330. Therefore, in the present embodiment, only the specification of the heat sink 390 may be changed according to the use of the lighting device 100 without changing the specification of the housing 330.

The heat sink 390 may be fixed to the peripheral wall 331 by press-fitting the peripheral wall 331 into the heat sink 390, and in the present embodiment, the heat sink 390 is fixed to the peripheral wall 331 by being coupled to the peripheral wall 331. Specifically, the heat sink 390 is caulked and fixed to the peripheral wall 331. Therefore, the case 330 dissipates heat generated from the light source unit 200 during lighting of the light emitting element 211 by conducting heat from the connection portion between the bottom wall portion 332 and the light source unit 200 to the connection portion between the peripheral wall portion 331 and the heat sink 390 via the bottom wall portion 332 and the peripheral wall portion 331. In the present embodiment, by increasing the connecting portion between the peripheral wall portion 331 and the heat sink 390, the heat generated by the LED can be efficiently transmitted from the light source unit 200 to the bottom wall portion 332, the peripheral wall portion 331, and the heat sink 390.

In the present embodiment, the lighting device 100 is a ceiling-embedded lighting device used by being embedded in a ceiling. Therefore, the lighting device 100 further includes the ring-shaped frame 400 and the plurality of plate springs 500.

An example of installation of the illumination device 100 will be described with reference to fig. 4. In fig. 4, a cross section of the ceiling member 600 and a side surface of the lighting device 100 fitted into the embedding hole 601 provided in the ceiling member 600 are shown.

The outer diameter R1 of the frame 400 is larger than the outer diameter R2 of the buried hole 601.

A plurality of leaf springs 500 are attached to the frame 400 along the circumferential direction of the frame 400 in order to fix the frame 400 around the embedding hole 601 of the ceiling. The number of leaf springs 500 is 3 in the present embodiment as shown in fig. 2 and 3, but may be 2 or 4 or more.

In the present embodiment, the portion of the power supply unit 300 other than the cover 340 and the light source unit 200 are disposed in the range of the aperture diameter of the embedded hole 601 or less and formed in a shape in which the axis is aligned with the center of the hole, so that the illumination device 100 can be inserted into the embedded hole 601 without being greatly inclined.

As a modification of the present embodiment, a lighting device of a type different from a downlight type, such as a spotlight type, a flange light (wall light) type, a ceiling light type, a wall light type, or a suspension light type, may be provided with the light source unit 200 and the power supply unit 300 similar to those of the present embodiment.

Next, the case 330, the heat sink 390, and the housing 370 of the power supply unit 300 will be described in detail in this order.

Referring to fig. 5 and 6, the details of the case 330 will be described.

The case 330 is a structure in which the light emitting element 211 can be disposed, and is a heat radiation path for transferring the operating heat of the light emitting element 211 to the external space, and also functions as a burn-up preventing wall by housing the power supply board 310 therein. Compared with a structure in which the power supply substrate is housed in a case provided outside the heat dissipation path, a significant reduction in size and weight can be achieved. The miniaturization and weight reduction contribute to simplification of packaging, improvement of logistics efficiency, and improvement of workability, that is, improvement of construction efficiency. The light weight reduces the risk of falling and contributes to the strength relaxation of the ceiling material 600, and therefore, leads to cost reduction. As a modification of the present embodiment, in the case where the lighting device provided on the wall includes the light source unit 200 and the power supply unit 300 similar to those of the present embodiment, weight reduction contributes to strength reduction of the wall member.

The cover 340 also closes the case 330 to function as a flame spread prevention wall and a heat radiation path.

The case 330 is formed of a plate-shaped incombustible material. The case 330 is formed into a bottomed tubular shape by press forming using a plate-shaped metal material. The bottom wall portion 332 and the peripheral wall portion 331 of the case 330 are integral, have the same thermal resistance, i.e., no thermal resistance discontinuity, and thus are excellent in thermal conductivity. That is, the housing 330 is a thermally integrated structure.

A flange portion 334 protruding outward is integrally formed at the opening end of the housing 330. The flange portion 334 is used as a mounting piece for screwing the lid 340. The flange portion 334 and the peripheral wall portion 331 of the case 330 are integral, have the same thermal resistance, i.e., no thermal resistance discontinuity, and thus are excellent in thermal conductivity. That is, the housing 330 is a thermally integrated structure.

Since the peripheral wall portion 331, the bottom wall portion 332, and the flange portion 334 are integrally formed with the case 330, the number of parts is small, and excellent assembling property and firmness are provided.

In the present embodiment, the outer diameter of the continuous portion 336, which is the portion where the peripheral wall portion 331 and the bottom wall portion 332 are connected, gradually increases from the bottom wall portion 332 toward the peripheral wall portion 331. That is, in the longitudinal section of the housing 330, the outer peripheral surface of the peripheral wall portion 331 and the outer surface of the bottom wall portion 332 are not connected at right angles but connected while being bent. Therefore, the air flowing near the outer surface of the bottom wall portion 332 easily flows along the outer surface of the continuous portion 336 to the outer peripheral surface of the peripheral wall portion 331, thereby improving the heat radiation performance of the case 330.

In the present embodiment, the inner diameter of the continuous portion 336 is also gradually increased from the bottom wall portion 332 toward the peripheral wall portion 331. That is, in the longitudinal section of the housing 330, the inner peripheral surface of the peripheral wall 331 and the inner surface of the bottom wall 332 are not connected at right angles but connected while being bent. Therefore, as long as the bottom of the housing 370 is not the same shape as the case 330, a gap is formed between the housing 370 and the peripheral wall 331 or between the housing 370 and the bottom wall 332. This can suppress heat transfer from the housing 330 to the housing 370.

As described above, the lid 340 and the bottom wall 332 may be provided with through holes for ventilation. In this case, by allowing air to flow into the gap between the case 330 and the housing 370, temperature increases of the light-emitting element 211 and the power supply substrate 310 can be suppressed.

The notch 335 through which the input wire 360 passes can also serve as a vent hole instead of the through hole of the cover 340.

The details of the heat sink 390 will be described with reference to fig. 7, 8, and 9. In fig. 7 and 8, the flow of air is indicated by arrows.

The heat sink 390 can be selectively attached to the outer circumferential portion of the case 330 according to the operating heat generated from the light emitting element 211.

Heat sink 390 is constructed of a thermally conductive material. The heat radiation fins 390 are formed of a metal plate that is bent in a wave shape to alternately form and extend one turn a peak 391 protruding in a direction away from the central axis of the heat radiation fins 390 and a valley 392 protruding in a direction close to the central axis of the heat radiation fins 390. That is, the heat sink 390 is formed by bending a foldable annular plate material into a corrugated shape and processing the corrugated plate material into a cylindrical shape. That is, the heat sink 390 is formed of a metal plate bent in a wave shape and having ridges 391 and valleys 392 formed alternately, and is configured to make one turn so that the ridges 391 face outward (outward) and the valleys 392 face inward (inward). The number of the ridges 391 may be any number, and in the present embodiment is 18.

The heat sink 390 is fixed to the peripheral wall 331 from the outside of the case 330. Specifically, the valley portions 392 of the heat sink 390 are attached to the outer side of the peripheral wall portion 331. An air passage is formed between the peripheral wall 331 and the ridge 391 with both ends of the ridge 391 as an inlet and an outlet. That is, between the peripheral wall 331 and the heat sink 390, a ventilation path is formed in which both end portions of the heat sink 390 in the cylinder axis direction are opened. Therefore, the heat dissipation properties of the case 330 and the heat sink 390 are improved.

In the present embodiment, the inner edge of the heat sink 390 is firmly attached to the peripheral wall 331 by caulking. Thereby, the heat conduction effect and the strength are improved. The number and position of the caulking may be any number and position, and in the present embodiment, 3 trough portions 392 are selected at equal intervals in the circumferential direction of the heat sink 390, and 4 caulking portions are provided at equal intervals in the central axis direction of the heat sink 390 for each of the 3 trough portions 392. Therefore, the total number of the caulking pieces for connecting the heat sink 390 to the peripheral wall 331 is 12.

The heat sink 390 may be attached to the case 330 by press-fitting the case 330 along the inner edge of the heat sink 390. In this case, the heat sink 390 needs to have elasticity.

In the cross section including the tube axis of the case 330, the side of the heat sink 390 close to the lid 340 is reduced in diameter. That is, the heat sink 390 becomes narrow.

In the cross section including the tube shaft of the housing 330, the side of the fin 390 close to the bottom wall portion 332 is expanded in diameter.

In the present embodiment, by chamfering both ends of the mountain portion 391, the length of the mountain portion 391 is gradually shortened as it is distant from the central axis of the heat sink 390. That is, in the cross section including the tube axis of the case 330, the end portion of the heat sink 390 on the side close to the lid 340, that is, the upper end portion, and the end portion on the side close to the bottom wall portion 332, that is, the lower end portion, are cut in a rounded shape. The notch at the upper end portion improves the attachment to the ceiling material 600, and the notch at the lower end portion improves the air intake. Therefore, if at least one of both ends of the mountain portion 391 is chamfered, at least any effect can be obtained.

The size of the cut-off portion of at least one of both ends of the ridge portion 391 is preferably: in the circumferential direction of the frame 400, the size at the position overlapping the plate spring 500 is larger than the size at other positions. That is, since air hardly enters the inlets of the ventilation paths formed at either end of the peak portion 391 at the position overlapping with the plate spring 500, it is preferable to open the inlets of the ventilation paths formed at either end of the peak portion 391 at other positions to be larger than the inlets of the ventilation paths formed at either end of the peak portion 391 at other positions.

In the present embodiment, an opening 393 is provided near the center in the longitudinal direction of the peak 391. Air flows in and out through opening 393, and heat dissipation from case 330 and heat sink 390 is further improved.

The heat sink 390 may be partially cut out in consideration of a structure required for assembling the lighting device 100 or a structure required for mounting the lighting device 100 on a ceiling.

The fins 390 may be formed in a shape standing radially, a pin shape, a corrugated shape, or the like, other than the illustrated shape, and may be manufactured by a forming method other than bending, such as pressing or drawing. The shape of the peripheral wall 331 can be also changed as appropriate depending on the shape of the heat sink 390. That is, the peripheral wall 331 may have other shapes without being limited to a cylindrical shape as long as it is cylindrical.

The housing 370 will be described in detail with reference to fig. 10, 11, 12, 13, and 14. Fig. 10 shows an example of wiring of the output wire 320 and the input wire 360. Fig. 14 shows a structure of the housing 370, the case 330, the plate member 220, the insulating sheet 230, and the light source substrate 210.

The housing 370 is formed in a bottomed cylindrical shape.

The housing 370 has a first housing 371 and a second housing 372. The first receiving portion 371 receives the power supply board 310. The second receiving portion 372 is separated from the first receiving portion 371 by a partition 373.

The output wire 320 passes from the first receiving portion 371 across the partition wall 373 and enters the second receiving portion 372, and passes from the second receiving portion 372 through the through hole 374 provided in the bottom wall of the second receiving portion 372 and the through hole 333 provided in the bottom wall portion 332 and protrudes outside the receiving body 370 and the housing 330.

Thus, in the present embodiment, since a space for housing the power supply board 310 and a space for housing the output wires 320 are secured, the installation of the power supply board 310 and the wiring work can be performed efficiently.

The housing 370 further has a hollow column 375. The column portion 375 protrudes from a portion of the bottom wall of the second receiving portion 372 where the through hole is provided, and is fitted into the through hole 333 provided in the bottom wall portion 332.

The output wire 320 passes through the column portion 375 from the through hole 374 provided in the bottom wall of the second receiving portion 372 and projects outside the receiving body 370 and the housing 330.

A recess 376 through which the output electric wire 320 passes is provided at one end of the partition wall 373.

The receiving body 370 further has a hollow boss portion 377. The boss portion 377 is integrally formed with the bottom wall of the second receiving portion 372. A screw hole 378 connected to the boss portion is provided in the bottom wall of the second receiving portion 372. The housing body 370 is screwed to the bottom wall portion 332 through a screw hole 378 provided in the bottom wall of the second housing portion 372.

The housing 370 also has a bridge 379. The bridge 379 protrudes from one end of the peripheral wall of the first receiving portion 371 and is fitted into the notch 335 provided in the peripheral wall 331. When a through hole is provided in the peripheral wall portion 331 instead of the notch 335, the bridge portion 379 is fitted into the through hole.

The input wire 360 enters the first receiving portion 371 through a groove 380 provided in the bridge portion 379 from the outside of the receiving body 370 and the housing 330. That is, the input electric wire 360 enters the inside of the case 330 from the outside of the case 330 through the notch 335 provided in the peripheral wall portion 331. In addition, in place of the groove 380, a hole may be provided in the bridge 379 for passing the input wire 360.

In the present embodiment, the outer peripheral surface 381 of the housing body 370 extends obliquely with respect to the central axis direction of the peripheral wall portion 331, so that a gap is formed between the housing body 370 and the peripheral wall portion 331. This can suppress heat transfer from the housing 330 to the housing 370.

The angle formed by the outer peripheral surface 381 of the housing 370 and the central axis of the peripheral wall 331 is preferably 0.1 degree or more.

Regardless of whether or not the outer peripheral surface 381 of the housing body 370 extends obliquely with respect to the central axis direction of the peripheral wall portion 331, a gap may be formed between the housing body 370 and the peripheral wall portion 331 by employing a structure in which the inner peripheral surface of the peripheral wall portion 331 extends obliquely with respect to the central axis direction of the peripheral wall portion 331.

Although not shown, in the present embodiment, the light source unit 200 is coupled to the bottom wall portion 332 by caulking or screws from the outside of the case 330. Further, the bottom surface of the housing 370 is pushed up by a portion protruding inward of the case 330 by caulking or a portion protruding inward of the case 330 by a screw, so that a gap is also formed between the housing 370 and the bottom wall portion 332. This can suppress heat transfer from the housing 330 to the housing 370.

The first receiving portion 371 is provided with a partition wall 382 for partitioning an internal space along the tube axis direction of the receiving body 370. The partition wall 382 is connected to the bottom wall and the peripheral wall of the first receiving portion 371, similarly to the partition wall 373.

A first housing chamber 383 is formed between the partition wall 373 and the partition wall 382, and houses the power supply substrate 310.

The first accommodation chamber 383 is filled with a predetermined amount of a curable filling material made of a resin material, so that the power supply board 310 is fixed in the first accommodation chamber 383 and serves as a heat radiation path for radiating the operating heat of the power supply board 310 to the outside of the container 370. The filler is filled so as not to cover the aluminum electrolytic capacitor that is a component of the lighting circuit 311 disposed on the power supply substrate 310.

A protrusion 384 protruding toward the opening side is formed in the bottom wall of the first accommodation chamber 383. The bulge 384 has an effect of reducing the amount of the filler used together with the partition wall 373 and the partition wall 382 that form the first accommodation chamber 383.

Since no opening is formed in the partition wall 373 and the partition wall 382 that form the first housing chamber 383, the filler does not leak from the first housing chamber 383. That is, the filling material does not leak from the container 370.

A substrate insertion guide 385 is formed on the peripheral wall of the first accommodation chamber 383 along the tube axis direction of the accommodation body 370.

A second receiving portion 372 is formed on the partition wall 373 on the side opposite to the first receiving chamber 383.

The second receiving portion 372 has a pair of output wires 320.

The bottom wall of the second receiving portion 372 has 2 openings.

One opening is a screw hole 378 for screwing the housing 370 to the housing 330. The screw hole 378 is connected to a boss portion 377 extending from the bottom wall of the second receiving portion 372 in the pipe axis direction of the receiving body 370, and connects the outside of the receiving body 370 to the second receiving portion 372.

The other opening is a through hole 374 through which the output wire 320 for supplying lighting power from the power supply substrate 310 to the light emitting element 211 is inserted. The through hole 374 is connected to the column portion 375 that is provided to extend from the bottom wall of the second receiving portion 372 to the outside of the receiving body 370 along the tube axis direction of the receiving body 370. The column portion 375 also functions as a positioning structure for aligning the positions of the housing 370, the case 330, the plate-like member 220, the insulating sheet 230, and the light source substrate 210 in the tube axis direction of the housing 370 with each other.

A recess 386 is formed at a front end portion of the column portion 375 erected outside the housing 370, and the recess 386 is used to guide the output wire 320 drawn out from the through hole 374 to the connector 212 of the light source substrate 210.

A recess 376 for leading the output wire 320 from the power board 310 to the second receiving portion 372 is formed at an end of the partition wall 373 at the boundary between the first receiving chamber 383 and the second receiving portion 372.

A second housing chamber 387 is formed on the opposite side of the partition wall 382 from the first housing chamber 383. That is, a second housing chamber 387 is formed on the opposite side of the second housing portion 372 with the first housing chamber 383 interposed therebetween. Although not shown, a control board or the like provided with a control circuit for controlling the output of the lighting power is appropriately housed in the second housing chamber 387.

Similarly to the partition wall 382, no opening is formed in the peripheral wall and the bottom wall of the second storage chamber 387. Therefore, as in the case of the first storage chamber 383, the second storage chamber 387 can be filled with a required amount of a curable filler made of a resin material.

In the peripheral wall of the second storage chamber 387, a substrate insertion guide 388 is formed along the tube axis direction of the storage body 370, similarly to the peripheral wall of the first storage chamber 383.

A bridge 379 having a concave cross section is formed on the peripheral wall of the second storage chamber 387 toward the outside. The bridge 379 allows the pair of input wires 360 to pass from the outside of the housing 370 to the second storage chamber 387. The input electric wire 360 crosses the peripheral wall portion 331 of the housing 330 made of a metal material, but due to the presence of the bridge portion 379, the input electric wire 360 can be prevented from contacting a sharp edge of the housing 330 to be disconnected or grounded.

A notch 335, which is a recess into which the bridge 379 fits, is formed at the opening end of the peripheral wall 331 of the housing 330. The bridge 379 is fitted into the notch 335 of the housing 330, and functions as a positioning structure for aligning the positions of the housing 330 and the housing 370 in the pipe axial direction of the housing 370 with each other.

A recess 389 is formed at an end of the partition wall 382 at a boundary between the first housing chamber 383 and the second housing chamber 387, for leading the input wire 360, a control signal line not shown, and the like from the bridge 379, the control board, and the like to the first housing chamber 383.

As described above, a gap is provided between the housing 330 and the housing 370. The heat insulating and air convection effects, and particularly the heat shrinkage of the absorption container 370 are obtained. In the present embodiment, the gap is formed by the draft required for forming the housing 370, but the gap may be provided by a method other than the above method.

Next, the details of the plate-like member 220 and the reflection plate 240 of the light source unit 200 will be described in order.

Referring to fig. 15, the plate-like member 220 will be described in detail. Fig. 15 shows a state in which only the plate-like member 220 is mounted on the power supply unit 300.

The plate-like member 220 is attached to the outer side of the bottom wall 332 of the housing 330 as appropriate in accordance with the specification of the lighting device 100. In consideration of thermal conductivity, the plate-like member 220 is firmly attached to the bottom wall portion 332 by a method such as screw fastening or caulking. The positions of the screw fastening and the caulking fastening are selected (1) so as not to overlap with the light emitting element 211 when heat conduction from the light source substrate 210 to the plate-like member 220 is prioritized; (2) when heat conduction from the plate-like member 220 to the bottom wall portion 332 is prioritized, a position overlapping the light-emitting element 211 is selected.

That is, (1) when heat conduction from the light source substrate 210 to the plate-like member 220 is prioritized, the connection portion between the bottom wall portion 332 and the plate-like member 220 is preferably located at a position not overlapping with the light-emitting element 211 in the central axis direction of the peripheral wall portion 331; (2) when heat conduction from the light source unit 200 to the bottom wall portion 332 is prioritized, a connection portion between the bottom wall portion 332 and the light source unit 200 is preferably located at a position overlapping with the light emitting element 211 in the central axis direction of the peripheral wall portion 331.

The details of the reflection plate 240 will be described with reference to fig. 16, 17, 18, and 19. Fig. 17 shows a state in which the light source unit 200 is mounted on the power supply unit 300. That is, fig. 17 shows a state in which the insulating sheet 230, the light source substrate 210, the reflecting plate 240, and the diffusing plate 250 are further attached after the plate-like member 220 is attached to the power supply unit 300. Fig. 18 and 19 show the procedure of mounting the frame 400 to the reflection plate 240 by using a hook 244 and a latch 245, which will be described later.

The reflection plate 240 is attached to the plate member 220 by screwing. The light source substrate 210 on which the light emitting elements 211 are mounted and the insulating sheet 230 for maintaining the insulation of the light source substrate 210 are sandwiched between the plate-shaped member 220 and the reflecting plate 240.

The reflecting plate 240 has a ring-shaped plate shape, and has a front side formed in a shape and a color tone that easily reflect light and a rear side radially formed with ribs 242 for maintaining strength. The rib 242 positioned in the wiring path of the output wire 320 is cut in a concave shape, and the output wire 320 is drawn out to the connector 212 of the light source substrate 210 through the concave portion 386 of the column portion 375 of the housing 370. Further, an inner peripheral wall 243 rising from the peripheral edge of the circular opening 241 is formed on the rear side of the reflection plate 240. Thus, the output wire 320 led out from the column portion 375 and connected to the connector 212 can be wired on the rear side of the reflection plate 240 so as not to interfere with the emission of light from the light emitting element 211. The number of the ribs 242 may be any number, and in the present embodiment is 11, and 6 of the ribs 242 are notched.

A mounting mechanism for mounting the frame 400 is formed on the outer periphery of the reflection plate 240. The mounting mechanism is comprised of a set of hooks 244 and latches 245. The mounting mechanism maintains a stress-free state in a state where the frame 400 is mounted.

Description of effects of "Diazaizai

In the present embodiment, the peripheral wall 331 and the bottom wall 332 of the case 330 of the power supply unit 300 are integrally formed. Therefore, by applying the power supply unit 300 to the illumination device 100, the heat dissipation performance of the illumination device 100 is improved.

In the present embodiment, the heat sink 390 of the power supply unit 300 is separate from the case 330. Therefore, only the specification of the heat sink 390 can be changed according to the use of the lighting device 100 without changing the specification of the housing 330, and it is possible to cope with various demands.

In the present embodiment, the accommodating body 370 accommodated inside the case 330 of the power supply unit 300 secures a space for accommodating the power supply board 310 and a space for accommodating the output wires 320. Therefore, by applying the power supply unit 300 to the illumination device 100, the illumination device 100 can be miniaturized.

In the present embodiment, between the peripheral wall 331 of the housing 330 of the power supply unit 300 and the ridges 391 of the heat sink 390, air passages are formed with both ends of the ridges 391 as entrances and exits. Therefore, the heat dissipation properties of the case 330 and the heat sink 390 are improved.

Embodiment 2.

The structure of the device of the present embodiment and the effects of the present embodiment will be explained in order. Differences from embodiment 1 will be mainly explained.

Description of the structure of Tuliuzhang

In the present embodiment, the structure of the cover 340 of the power supply unit 300 is different from the structure of the cover 340 of the power supply unit 300 in embodiment 1. The other structure of the power supply unit 300 is the same as that of the power supply unit 300 in embodiment 1. The configuration of the illumination device 100 other than the power supply unit 300 is also the same as that of the illumination device 100 of embodiment 1.

The structure of the cover 340 will be described with reference to fig. 20 and 21.

In the present embodiment, the cover 340 has a circular plate portion 341 and a fixing portion 342. The bottom wall portion 332 of the housing 330 closes one end of the peripheral wall portion 331 of the housing 330, and the circular plate portion 341 closes the other end of the peripheral wall portion 331. The fixing portion 342 is integrally formed with the circular plate portion 341. The terminal block 350 is fixed to the fixing portion 342. On both sides of a continuous portion 343 which is a portion where the circular plate portion 341 and the fixing portion 342 are connected, cutouts 344 are provided. That is, in the present embodiment, both sides of the continuous portion 343 are cut away.

The cover 340 also has a flange portion 345. The flange 345 is integrally formed with the circular plate 341, similarly to the fixing portion 342. The flange 345 protrudes from the outer peripheral portion of the circular plate 341 perpendicularly to the central axis direction of the circular plate 341. That is, the flange portion 345 protrudes from the outer peripheral portion of the circular plate portion 341 in the radial direction of the circular plate portion 341. The flange portion 345 is coupled to the flange portion 334 of the housing 330.

Description of effects of "Diazaizai

Although the air passage with both ends of the ridge 391 as the inlet and outlet is formed between the peripheral wall 331 of the housing 330 and the ridge 391 of the heat sink 390, the cover 340 is present near the outlet in some of the air passage, and therefore, air hardly escapes. In the present embodiment, since the portion that closes the peripheral wall portion 331 of the lid body 340 is the circular plate portion 341 and both sides of the portion where the circular plate portion 341 and the fixing portion 342 are connected are cut away, the lid body 340 is present near the outlet in only a small number of ventilation paths as compared with embodiment 1, as shown in fig. 21. Therefore, the heat dissipation properties of the case 330 and the heat sink 390 are improved. In addition, in the present embodiment, in addition to the ventilation promotion, the lighting device 100 can be reduced in weight.

Embodiment 3.

Description of the structure of Tuliuzhang

The structure of the cover 340 will be described with reference to fig. 22 and 23.

In the present embodiment, the lid 340 is provided with a vent hole 346. The bottom wall portion 332 of the case 330 blocks one end of the peripheral wall portion 331 of the case 330, and a portion of the cover 340 blocks the other end of the peripheral wall portion 331. At a portion where the other end of the peripheral wall 331 is closed and the portion where the terminal base 350 is fixed, 5 vent holes 346 are provided so as to be arranged in an arc shape. Each vent 346 is disposed at a portion corresponding to the peak 391 of the heat sink 390. The positions and the number of the vent holes 346 can be appropriately changed according to the positions and the number of the ridges 391 of the heat sink 390.

The cover 340 also has a flange portion 345. The flange 345 projects perpendicularly outward from the outer peripheral portion of the portion that closes the other end of the peripheral wall 331. The flange portion 345 is coupled to the flange portion 334 of the housing 330.

Description of effects of "Diazaizai

Although the air passage with both ends of the ridge 391 as the inlet and outlet is formed between the peripheral wall 331 of the housing 330 and the ridge 391 of the heat sink 390, the cover 340 is present near the outlet in some of the air passage, and therefore, air hardly escapes. In the present embodiment, since the vent hole 346 is provided in a portion that blocks the peripheral wall portion 331 of the lid body 340, air easily escapes from a vent path having an outlet at a position corresponding to the vent hole 346. Therefore, the heat dissipation properties of the case 330 and the heat sink 390 are improved. In addition, in the present embodiment, in addition to the ventilation promotion, the lighting device 100 can be reduced in weight.

Embodiment 4.

Description of the structure of Tuliuzhang

The configuration of the illumination device 100 as the device of the present embodiment will be described with reference to fig. 24.

In the present embodiment, the structure of the heat sink 390 is different from the structure of the heat sink 390 of the power supply unit 300 in embodiment 1. The other structure of the power supply unit 300 is the same as that of the power supply unit 300 in embodiment 1. The configuration of the illumination device 100 other than the power supply unit 300 is also the same as that of the illumination device 100 of embodiment 1.

Details of the heat sink 390 will be described with reference to fig. 25, 26, 27, and 28. In fig. 27 and 28, the flow of air is indicated by arrows.

In embodiment 1, as shown in fig. 7 and 8, the opening 393 is provided near the center in the longitudinal direction of the peak 391 of the heat sink 390, but in this embodiment, the opening 393 is not provided. Therefore, the heat dissipation area is increased, and the heat dissipation efficiency is improved.

Between the peripheral wall 331 of the housing 330 and the ridges 391 of the heat sink 390, a ventilation path is formed with both ends of the ridges 391 as entrances and exits, as in embodiment 1, but in the present embodiment, since the opening 393 is not provided, air does not enter and exit in the middle of the ventilation path. Therefore, air can be moved more smoothly without generating turbulence of air between the case 330 and the heat sink 390, and thus, heat radiation efficiency is improved.

The heat sink 390 is formed by press working as in embodiment 1.

Description of effects of "Diazaizai

In the present embodiment, particularly in the case where the installation environment of the illumination device 100 is an environment in which a large amount of air flow is difficult to generate, the heat radiation performance of the illumination device 100 is improved as compared with embodiment 1.

In embodiment 1, since the opening 393 is provided in the peak portion 391 of the heat sink 390 which is the outer shell portion of the illumination device 100, it is preferable to perform edge processing such as round surface processing and chamfer surface processing on the peripheral edge portion of the opening 393 by 2-time processing or the like. In embodiment 1, since burrs may remain on the peripheral edge of the opening 393, it is preferable to perform a process of removing the burrs. On the other hand, in the present embodiment, it is no longer necessary to perform such 2 processes. Therefore, the processing chips are not scattered to the manufacturing environment and the installation environment of the illumination device 100, and the cause of deterioration of the insulation performance of the manufacturing environment and the installation environment of the illumination device 100 can be eliminated.

Embodiment 5.

The present embodiment will be described mainly with respect to differences from embodiment 1.

The structure of the heat sink 390 will be described with reference to fig. 29.

In the present embodiment, the fins 390 are corrugated fins. The heat sink 390 is formed in a tubular shape by bending a long metal plate to alternately form ridges 391 and valleys 392 and fastening both ends in the longitudinal direction. The heat sink 390 is press-fitted into the housing 330, and the valley portions 392 are pressed against the peripheral wall portion 331 of the housing 330. The trough 392 may be partially riveted to the peripheral wall 331, or the trough 392 may be partially welded to the peripheral wall 331.

Embodiment 6.

The structure of the heat sink 390 will be described with reference to fig. 30 and 31.

In the present embodiment, the fins 390 are press-formed, i.e., drawn-in fins. The fin 390 is formed into a cylindrical shape by press forming. The heat sink 390 has a bottom wall at one end in the cylinder axis direction and an opening at the other end, similarly to the case 330. The heat sink 390 is press-fitted into the housing 330, and the valley portions 392 are pressed against the peripheral wall portion 331 of the housing 330. The trough 392 may be partially riveted to the peripheral wall 331, or the trough 392 may be partially welded to the peripheral wall 331.

Embodiment 7.

The structure of the heat sink 390 will be described with reference to fig. 32 and 33.

In the present embodiment, the heat sink 390 is a direct-mount type heat sink. The heat sink 390 is formed of a plurality of fins 394. Each fin 394 is directly attached to the peripheral wall 331 of the housing 330 by caulking, welding, or the like. According to the present embodiment, the position and the number of the mounting fins can be flexibly changed according to the specification of the product.

In the present embodiment, each fin 394 is riveted at a plurality of portions. Specifically, each fin 394 is riveted at 3 locations which are dotted circle portions in the drawing.

In the present embodiment, each fin 394 has a flat plate shape having an L-shaped cross section, but may have a flat plate shape having a Z-shaped cross section, a flat plate shape having an M-shaped cross section, or other shapes.

Embodiment 8.

Description of the structure of Tuliuzhang

The configuration of the illumination device 100 as the device of the present embodiment will be described with reference to fig. 34 and 35.

In the present embodiment, the power supply unit 300 does not have the heat sink 390. The other structure of the power supply unit 300 is the same as that of the power supply unit 300 in embodiment 1. The configuration of the illumination device 100 other than the power supply unit 300 is also the same as that of the illumination device 100 of embodiment 1.

Description of effects of "Diazaizai

In the present embodiment, the light weight and cost reduction of the lighting device 100 can be achieved by omitting the heat sink 390.

Embodiment 9.

Description of the structure of Tuliuzhang

The configuration of the illumination device 100 as the device of the present embodiment will be described with reference to fig. 36 and 37.

In the present embodiment, the configuration of the illumination device 100 is the same as that of the illumination device 100 of embodiment 1.

The power supply unit 300 has a fixing member 702 and a pair of connectors 701.

Each of the couplers 701 couples the cover 340 to the housing 330. In the present embodiment, each of the couplers 701 is a screw.

The fixing member 702 fixes the terminal block 350 to the cover 340. In this embodiment, the fixture 702 is a screw.

Next, the details of the cover 340 will be described.

The cover 340 is elongated. The cover 340 has a blocking portion 711 and a fixing portion 342. The bottom wall portion 332 of the case 330 closes one end of the peripheral wall portion 331 of the case 330, and the closing portion 711 closes the other end of the peripheral wall portion 331. The terminal block 350 is fixed to the fixing portion 342. The blocking portion 711 and the fixing portion 342 are aligned along the direction of the central axis L1 of the cover 340, that is, the longitudinal direction of the cover 340. In the present embodiment, the fixing portion 342 is integrally formed with the blocking portion 711. The portion of the blocking portion 711 connected to the fixing portion 342 is formed in a rectangular plate shape, and the portion of the blocking portion 711 distant from the fixing portion 342 is formed in a semicircular plate shape.

In the blocking portion 711, the pair of couplers 701 couple the cover 340 to the housing 330 at positions facing each other on a straight line having an angle θ with respect to the center axis L1 of the cover 340, that is, at positions facing each other in a direction inclined with respect to the longitudinal direction of the cover 340. The angle θ may be any angle greater than 0 degrees and less than 180 degrees, and in the present embodiment, is 45 degrees. That is, in the present embodiment, the pair of couplers 701 couple the cover 340 to the housing 330 at positions on the blocking portion 711 that face each other in a direction of 45 degrees with respect to the longitudinal direction of the cover 340.

The cover 340 also has a flange portion 345. The flange 345 is integrally formed with the blocking portion 711, similarly to the fixing portion 342. The flange 345 protrudes from the outer peripheral portion of the semicircular plate-shaped portion of the blocking portion 711 to the outside of the blocking portion 711. One of the pair of couplers 701 is screwed into a screw hole provided in one of the flange portions 334 of the housing 330 via a screw hole provided in the flange portion 345. The other connector 701 is screwed into the screw hole of the other flange portion 334 of the housing 330 via a screw hole provided at a position facing the screw hole of the flange portion 345 on a straight line forming an angle θ with the central axis L1 of the cover 340 in a portion of the blocking portion 711 forming a rectangular plate shape. Thereby, the lid 340 is screwed to the flange portion 334 of the case 330.

A step 720 is provided on one surface, i.e., the upper surface, of the cover 340. Specifically, a コ -shaped step 720 is provided on one end side in the longitudinal direction of the cover 340. The lid 340 closes the other end of the peripheral wall 331 at a portion of the lower surface opposite to the one surface, that is, at a portion corresponding to the high step 721 of the upper surface. In addition, the cover 340 fixes the terminal block 350 at a portion of the lower surface, at least a portion of which corresponds to the low step 722 of the upper surface. Specifically, the cover 340 fixes the terminal block 350 at a portion of the lower surface, a portion of which corresponds to the low step 722 of the upper surface and the remaining portion of which corresponds to the high step 721 of the upper surface. That is, in the present embodiment, a part of the high step 721 of the cover 340 corresponds to the closing portion 711, and the remaining part of the high step 721 and the low step 722 of the cover 340 correspond to the fixing portion 342.

The fixing member 702 protrudes from the low step 722 of the upper surface of the blocking portion 711. The dimension D1 of step 720 is preferably greater than the length of the protruding portion of the fastener 702. The step 720 is formed by deforming a metal plate to be the lid 340 by drawing or the like.

Description of effects of "Diazaizai

In the present embodiment, the cover 340 is fixed to the flange portion 334 by using the fastening tool 701 which is 2 screws, but in order to miniaturize the power supply unit 300 and the illumination apparatus 100, the position of the screw fixation is determined so as to satisfy the following requirements.

The screwing is performed at a position that does not become an obstacle when the lighting device 100 is mounted on a ceiling or the like.

The screwing is performed at a position not interfering with the wiring of the input wire 360 electrically connecting the terminal block 350 and the power supply substrate 310. Specifically, the screwing is performed at a position not interfering with the end of the input electric wire 360.

The screw-fastening is performed at a position capable of supporting the stress applied to the cover 340 to the maximum.

The screwing is performed at a position capable of supporting the stress at the time of wiring to the terminal block 350 to the maximum.

In the present embodiment, screw holes are provided at 2 positions that are axisymmetrical in a direction of substantially 45 degrees with respect to a longitudinal direction that is a direction along the extension direction of the terminal block 350 of the lid 340, and the lid 340 is fixed to the flange portion 334 by screwing the coupling 701 into each screw hole. Therefore, the above conditions can be satisfied in a balanced manner. The angles formed with respect to the longitudinal direction may be different angles. The position of the screw fixation is not limited to 2 positions, and may be 1 position or 3 or more positions. The number of the flange portions 334 of the housing 330 can be changed as appropriate depending on the number of the screw-fastening portions.

According to the present embodiment, the wiring of the input wire 360 is not obstructed at the time of assembling the illumination device 100. Further, when the lighting device 100 is mounted, stress applied to the cover 340 by an operator holding the cover 340 or stress applied to the cover 340 by wiring work can be absorbed to the maximum extent.

In the present embodiment, the portion of the cover 340 to which the terminal block 350 is attached is offset toward the light source. Therefore, the problem of the height dimension of illumination device 100 becoming larger due to upward protrusion of fixture 702 can be prevented. That is, according to the present embodiment, the height of the illumination device 100 can be kept low, and the illumination device 100 can cope with an installation environment in which the height is narrow. In embodiment 2 and embodiment 3 as well, since the portion of the lid 340 to which the terminal block 350 is attached is offset toward the light source side, the same effect can be obtained. Even if the entire portion of the cover 340 to which the terminal block 350 is attached is not offset toward the light source side, the same effect can be obtained by offsetting at least the portion of the cover 340 where the fixing member 702 is disposed toward the light source side.

In the present embodiment, the step 720 is formed by partially drawing a metal plate that becomes the lid 340. Therefore, the strength of the lid 340 against the lid bending increases. In embodiment 2 and embodiment 3 as well, since the metal plate as the lid 340 is partially drawn, the same effect can be obtained.

Embodiment 10.

The structure of the device of the present embodiment and the effects of the present embodiment will be explained in order. Differences from embodiments 1 and 9 will be mainly described.

Description of the structure of Tuliuzhang

In the present embodiment, the structure of the cover 340 of the power supply unit 300 is different from the structure of the cover 340 of the power supply unit 300 in embodiments 1 and 9. The other structure of the power supply unit 300 is the same as that of the power supply unit 300 in embodiment 1 and embodiment 9. The configuration of the illumination device 100 other than the power supply unit 300 is also the same as that of the illumination device 100 according to embodiments 1 and 9.

The structure of the lid 340 will be described with reference to fig. 38 and 39.

As in embodiments 1 and 9, the flange 345 projects outward from the blocking portion 711 from the outer peripheral portion of the semicircular plate-shaped portion of the blocking portion 711. One of the pair of couplers 701 is screwed into a screw hole of one flange portion 334 of the housing 330 via a screw hole 703 provided in the flange portion 345. The other connector 701 is screwed into a screw hole provided in the other flange portion 334 of the housing 330 via a screw hole 703 provided in a position facing the screw hole 703 of the flange portion 345 on a straight line forming an angle θ with the central axis L1 of the cover 340, in a portion of the blocking portion 711 forming a rectangular plate shape. Thereby, the lid 340 is screwed to the flange portion 334 of the case 330.

In the present embodiment, a step 720, which is linear in plan view, is provided from one end to the other end in the width direction of the cover 340. The cover 340 closes the other end of the peripheral wall portion 331 at a portion of the lower surface corresponding to the high step 721 of the upper surface. In addition, the cover 340 fixes the terminal block 350 at a portion of the lower surface, at least a portion of which corresponds to the low step 722 of the upper surface. Specifically, the cover 340 fixes the terminal block 350 at a portion of the lower surface, which all corresponds to the low step 722 of the upper surface. That is, in the present embodiment, the high step 721 of the cover 340 corresponds to the closing portion 711, and the low step 722 of the cover 340 corresponds to the fixing portion 342.

As in embodiment 1 and embodiment 9, the fixing member 702 protrudes from the low step 722 on the upper surface of the blocking portion 711. The dimension D1 of step 720 is preferably greater than the length of the protruding portion of the fastener 702. The step 720 is formed by deforming a metal plate to be the lid 340 by a method such as press working.

Description of effects of "Diazaizai

In the present embodiment, the metal plate to be the lid 340 is not partially drawn, but can be stably formed at high speed by simple press working. Therefore, the manufacturing quality can be maintained at a high level, and mass production is facilitated. In addition, manufacturing costs and the unit price of parts are reduced.

Embodiment 11.

Description of the structure of Tuliuzhang

In the present embodiment, the structure of the housing 370 of the power supply unit 300 is different from the structure of the housing 370 of the power supply unit 300 in embodiment 1. The other structure of the power supply unit 300 is the same as that of the power supply unit 300 in embodiment 1. The configuration of the illumination device 100 other than the power supply unit 300 is also the same as that of the illumination device 100 of embodiment 1.

The structure of the housing 370 will be described with reference to fig. 40.

The housing 370 has a bridge 379, as in embodiment 1. The bridge 379 protrudes from one end of the peripheral wall of the first receiving portion 371 and is fitted into the notch 335 provided in the peripheral wall 331 of the housing 330. The input wire 360 enters the first receiving portion 371 through a groove 380 provided in the bridge portion 379 from the outside of the receiving body 370 and the housing 330. That is, the input electric wire 360 enters the inside of the case 330 from the outside of the case 330 through the notch 335 provided in the peripheral wall portion 331.

As in embodiment 1, the first receiving portion 371 is provided with a partition wall 382 for partitioning the internal space along the tube axis direction of the receiving body 370. The partition wall 382 partitions the internal space of the first receiving portion 371 to form a first receiving chamber 383 distant from the bridge portion 379 and a second receiving chamber 387 close to the bridge portion 379. At one end of the partition wall 382, a concave portion 389 is formed to lead the input wire 360 from the bridge 379 to the first housing chamber 383 over the second housing chamber 387 and the partition wall 382.

As in embodiment 1, the length of the groove 380 provided in the bridge portion 379 is longer than the length of the recess 389 formed at one end of the partition wall 382. On the other hand, the width of the groove 380 provided in the bridge portion 379 is the same as the width of the recess 389 formed at one end of the partition wall 382. The groove 380 provided in the bridge 379 has the same depth as the recess 389 formed at one end of the partition wall 382. The shape of the groove 380 provided in the bridge 379 is also the same as the shape of the recess 389 formed at one end of the partition wall 382. The shapes of the groove 380 and the depressed portion 389 are rectangular groove shapes having a width dimension larger than a depth dimension as shown in fig. 10 and 11 in embodiment 1, but are V-groove shapes as shown in fig. 40 in the present embodiment. The shape of the groove 380 and the depressed portion 389 may be other shapes, specifically, a semicircular groove shape as shown in fig. 41, a rectangular groove shape having a depth dimension larger than a width dimension as shown in fig. 42, an inverted M-shaped groove shape and a W-shaped groove shape, which are not shown. When the grooves 380 and the depressed portions 389 have an inverted M-shaped groove shape or a W-shaped groove shape, the wiring paths can be distributed in the deepest 2 locations. In addition, the groove 380 and the recess 389 may also serve as a tensile anchor of the input wire 360, and in this case, the width of the groove 380 and the recess 389 is set to be slightly narrower than the outer diameter of the input wire 360 including the coating layer.

In the bridge 379, it is preferable to perform edge processing such as round-cornered surface processing or chamfer surface processing on the corner where the input wire 360 passes or intersects.

The depth of the recess 389 formed at one end of the partition wall 382 may be deeper than the depth of the groove 380 provided in the bridge 379. In this case, the length of the input wire 360 can be shortened.

Although not shown, a support portion around which the input electric wire 360 is wound may be provided in the partition wall 382 in order to fix the input electric wire 360 in tension.

Description of effects of "Diazaizai

In the present embodiment, as in embodiment 1, since the bridge 379 is present, the input electric wire 360 can be prevented from contacting the sharp edge of the housing 330 and being disconnected or grounded.

Embodiment 12.

Description of the structure of Tuliuzhang

The structure of the housing 370 will be described with reference to fig. 43 and 44.

In the present embodiment, the bridge 379 extends to one end of the partition wall 382 and is fitted into a recess 389 formed at one end of the partition wall 382.

The bridge 379 is integrated with the first receiving portion 371 in embodiment 1, but is separated from the first receiving portion 371 in this embodiment. A notch 801 is provided at one end of the peripheral wall of the first receiving portion 371 for allowing the bridge portion 379 to pass from the inside of the first receiving portion 371 to the outside of the first receiving portion 371.

In this way, in the present embodiment, the bridge 379 is attached to the first receiving portion 371 so as to fit into the recess 389 formed at one end of the partition wall 382 and the notch 801 provided at one end of the peripheral wall of the first receiving portion 371.

The shape of the groove 380 is not limited to a rectangular groove shape having a larger width than depth, and may be any shape such as a V-groove shape, a semicircular groove shape, a rectangular groove shape having a larger depth than width, an inverted M-groove shape, or a W-groove shape. In addition, the groove 380 may also serve as a tensile fixing member for the input wire 360, and in this case, the width of the groove 380 is set to be slightly narrower than the outer diameter of the input wire 360 including the coating layer.

As shown in fig. 45, in order to pass the input electric wire 360, a hole 802 may be provided in the bridge portion 379 instead of the groove 380. That is, the bridge portion 379 may be cylindrical. Specifically, the bridge 379 may be a square cylinder or a cylinder.

The partition wall 382 may be detachably attached to the first receiving portion 371. In this case, the bridge 379 may be formed integrally with the partition wall 382.

The bridge 379 may be integrally formed with the cap body 340.

Description of effects of "Diazaizai

In the present embodiment, the following structure is adopted: the bridge 379 is a separate member and is attached so as to straddle the peripheral wall 331 of the housing 330, the peripheral wall of the second housing chamber 387, and the partition wall 382. Therefore, the shape of the housing 370 can be formed in a simple cylindrical shape, and the mold for molding can be simplified. Further, the rigidity, i.e., the structural strength of the housing 370 is increased. Further, since the housing body 370 does not have a portion projecting in the direction perpendicular to the tube axis direction, the bridge portion 379 does not catch on another member during the assembling work.

Embodiment 13.

The present embodiment will be described mainly with respect to differences from embodiment 12.

In the present embodiment, power supply unit 300 has other electric wire 810 than input electric wire 360.

The electric wire 810 electrically connects the control board and the like housed in the second housing chamber 387 and the terminal block 350, and serves as an input path through which electric power is input from an external power supply to a control circuit and the like.

In the present embodiment, the structure of the housing 370 is different from the structure of the housing 370 in embodiment 12.

The structure of the housing 370 will be described with reference to fig. 46 and 47.

In the present embodiment, the electric wire 810 is led from the outside of the housing 370 to the recess 803 of the second housing chamber 387 over the peripheral wall of the first housing portion 371, and is formed in the middle of the notch 801 provided at one end of the peripheral wall of the first housing portion 371. Specifically, the central portion of the notch 801 is further deeply cut out to form a recess 803.

In the present embodiment, since the bridge portion 379 is present, the wiring path of the input wire 360 and the wiring path of the other wire 810 are separated, and thus, the wiring operation can be smoothly performed.

Embodiment 14.

The structure of the housing 370 will be described with reference to fig. 48 and 49.

In the present embodiment, the housing body 370 has the bridge portion 804 other than the bridge portion 379. The other bridge 804 is projected from one end of the peripheral wall of the first receiving portion 371 so as to overlap with the bridge 379, and is fitted into the notch 335 provided in the peripheral wall 331 of the housing 330. The bridge 379 is separate from the first receiving portion 371, and the other bridge 804 is integral with the first receiving portion 371.

The electric wire 810 enters the second receiving chamber 387 from the outside of the housing body 370 and the housing 330 through the groove 805 provided in the other bridge 804. Note that, in place of the groove 805, a hole may be provided in the other bridge 804 so that the power supply line 810 passes through the hole.

In this embodiment, since the bridge portion 379 and the other bridge portion 804 are present, a wiring path having a multilayer structure is formed, and thus, wiring work can be performed smoothly.

Embodiment 15.

The structure of the housing 370 will be described with reference to fig. 50, 51, and 52.

In the present embodiment, through-hole 374 provided in the bottom wall of second receiving portion 372 is gradually narrowed from the inside of second receiving portion 372 toward the outside of second receiving portion 372. That is, the through hole 374 provided in the pillar portion 375 has a tapered spindle-like vertical cross section toward the tip end of the pillar portion 375. In other words, the cross section of the through hole 374 has a smaller opening area on the distal end side than the side of the pillar portion 375 closer to the second receiving portion 372. This facilitates insertion of the output wire 320 into the through hole 374.

The front end of the column portion 375, which the output wire 320 contacts, is preferably subjected to edge treatment such as round-off surface treatment or round-off surface treatment.

The cross-sectional shape of the through hole 374 provided in the column portion 375, that is, the opening shape of the through hole 374 may be a polygon such as a rectangle, a circle such as a perfect circle, an ellipse, or another shape such as a star. Similarly, the cross-sectional shape of the column portion 375 may be polygonal such as rectangular, circular such as perfect circle, ellipse, and oblong, or may be other shapes such as star.

In the present embodiment, the concave portion 386 of the column portion 375 is provided at 2 locations as in embodiment 1, but the concave portion 386 may be provided at only 1 location, specifically, only one side, or at least 3 locations. In particular, when the wiring paths of the output wires 320 are in 1 direction or when a plurality of wiring paths of the output wires 320 are close to each other, the concave portions 386 may be provided at 1 position.

The recess 386 may double as a tensile fixing member of the output electric wire 320, and in this case, the width of the recess 386 is set to be slightly narrower than the outer diameter of the output electric wire 320 including the coating layer. The recess 386 holds the output wire 320 with the output wire 320 interposed therebetween, so that even if vibration or impact is applied to the output wire 320, the output wire 320 is not damaged by friction with the recess 386, and connection failure of the connector 212 of the light source substrate 210 and the like can be prevented.

In the present embodiment, the column portion 375 is provided at only 1 location as in embodiment 1, but the column portion 375 may be provided at 2 or more locations depending on the number and arrangement of objects electrically connected to the output electric wire 320, specifically, the number and arrangement of the connectors 212.

The post portion 375 may be pressed into the through hole 333 of the housing 330. In this case, the housing 370 can be fixed so as not to be detached from the housing 330, and thus screw fixation is not required.

The post portion 375 can have a locking mechanism. Specifically, the column portion 375 may have a protrusion that is hooked on a peripheral edge portion of the through hole 333 in a state where the column portion 375 is inserted into the through hole 333 of the case 330. In this case as well, the housing 370 can be fixed so as not to be detached from the housing 330, and thus screw fixation is not necessary.

The column portion 375 may be formed as a cylindrical rivet that is separate from the second receiving portion 372. In this case, the rivet serving as the post portion 375 is press-fitted into the through hole 374 provided in the bottom wall of the second receiving portion 372 in a state where the output wire 320 is inserted, and is fixed to the bottom wall of the second receiving portion 372. The rivet serving as the column portion 375 may double as a tensile fixing member of the output wire 320. The rivet serving as the post 375 may also have a function of fixing the bottom wall of the housing 370 and the bottom wall 332 of the case 330. In this case, the housing 370 can be fixed so as not to be detached from the housing 330, and thus screw fixation is not required.

In embodiment 1, the second receiving portion 372 is open in the outer circumferential direction. Therefore, the through hole 374 is easily visible from the outside of the housing 370, and the output wire 320 is easily inserted into the through hole 374. In contrast, in the present embodiment, the second receiving portion 372 is sealed in the outer circumferential direction, similarly to the first receiving portion 371. Therefore, the rigidity of the housing 370 is increased, and the structural strength of the lighting device 100 can be improved. Further, the output wires 320 can be protected by separating the output wires 320 from the case 330 that performs a heat radiation function. The output electric wire 320 is not sandwiched between the housing 370 and the case 330, so that the output electric wire 320 can be prevented from being short-circuited due to damage to the coating of the output electric wire 320. Further, the housing 370 is interposed between the output wire 320 and the case 330, thereby improving insulation performance. In particular, the housing 330 is made of a metal material, and when external interference of a high voltage is received from the outside of the lighting device 100, the external interference can be prevented from being propagated to the output wire 320 to damage the light emitting element 211 and the lighting circuit 311.

In the present embodiment, inner wall surface 806 of second receiving portion 372 is inclined so that the internal space of second receiving portion 372 gradually narrows toward through hole 374 provided in the bottom wall of second receiving portion 372. That is, the inner wall surface 806 of the second receiving portion 372 is inclined in a funnel shape toward the through hole 374. Therefore, even if the through hole 374 cannot be visually recognized from the outside of the housing 370, the output wire 320 can be smoothly inserted into the through hole 374.

While the embodiments of the present invention have been described above, several of the embodiments may be combined and implemented. Alternatively, any one or several of these embodiments may also be partially implemented. For example, in the description of the embodiments, only one of the portions described as the "section" may be used, or any combination of several of the portions may be used. The present invention is not limited to these embodiments, and various modifications may be made as necessary.

Description of reference numerals

100 lighting device, 200 light source unit, 210 light source substrate, 211 light emitting element, 212 connector, 220 plate-like member, 221 plate surface, 222 plate surface, 230 insulating sheet, 240 reflecting plate, 241 opening portion, 242 rib, 243 inner peripheral wall, 244 hook, 245 latch, 250 diffusing plate, 300 power supply unit, 310 power supply substrate, 311 lighting circuit, 320 output electric wire, 330 case, 331 peripheral wall portion, 332 bottom wall portion, 333 through hole, 334 flange portion, 335 notch, 336 continuous portion, 340 cover body, 341 circular plate portion, 342 fixed portion, 343 continuous portion, 344 notch, 345 flange portion, vent 346, 350 terminal block, 360 input electric wire, 370 accommodating body, 371 first accommodating portion, 372 second accommodating portion, 373 partition wall, 374 through hole, 375 column portion, 376 concave portion, 377 boss portion, threaded hole, 379 bridge portion, 380 groove, 381 outer peripheral surface, 382, 383 first accommodating chamber, 384 convex portion, substrate 385 insertion guide, 386 concave portion, 387 second housing chamber, 388 substrate insertion guide, 389 concave portion, 390 radiating fin, 391 mountain portion, 392 valley portion, 393 opening portion, 394 fin, 400 frame, 500 leaf spring, 600 ceiling member, 601 embedded hole, 701 connector, 702 fixture, 703 screw hole, 711 blocking portion, 720 step, 721 high step, 722 low step, 801 notch, 802 hole, 803 concave portion, 804 bridge portion, 805 groove, 806 inner wall surface, 810 electric wire.

Claims

1. A power supply unit for lighting, which supplies lighting power to a light source unit provided with a light source circuit including a light emitting element, wherein,

the power supply unit for illumination includes:

a power supply substrate provided with a lighting circuit;

2. The power supply unit for lighting as claimed in claim 1,

the accommodating body further includes a hollow column portion protruding from a portion of the bottom wall of the second accommodating portion, the portion being provided with a through hole, and being fitted into the through hole provided in the bottom wall portion;

the output wire extends outside the housing and the case through a through hole provided in a bottom wall of the second housing portion and passing through the column.

3. The power supply unit for illumination according to claim 1 or 2,

a recess through which the output electric wire passes is provided at one end of the partition wall.

4. The power supply unit for illumination according to claim 1 or 2,

the accommodating body is also provided with a hollow boss part which is integrally formed with the bottom wall of the second accommodating part, and a threaded hole connected to the boss part is arranged on the bottom wall of the second accommodating part;

the housing body is screwed to the bottom wall portion via a screw hole provided in the bottom wall of the second housing portion.

5. The power supply unit for illumination according to claim 1 or 2,

the power supply unit for illumination further includes:

a lid body that closes the other end of the peripheral wall portion;

a terminal block fixed to the cover from an outer side of the case; and

an input wire that electrically connects the power supply board and the terminal block to form an input path through which lighting power is input to the lighting circuit;

the housing further includes a bridge portion protruding from one end of a peripheral wall of the first housing portion and fitted into a notch or a through hole provided in the peripheral wall;

the input electric wire enters the first receiving portion from the outside of the housing and the housing through a groove or a hole provided in the bridge portion.

6. The power supply unit for illumination according to claim 1 or 2,

the housing is integrally formed of a metal material, and the housing is integrally formed of a resin material.

7. The power supply unit for illumination according to claim 1 or 2,

the power supply unit for lighting further includes a heat sink fixed to the peripheral wall portion from the outside of the case.

8. The power supply unit for illumination according to claim 5,

a partition wall that partitions an internal space of the first housing portion to form a first housing chamber distant from the bridge portion and a second housing chamber close to the bridge portion is provided in the first housing portion;

a recess that opens the input electric wire from the bridge to the first housing chamber across the second housing chamber and the partition wall is formed at one end of the partition wall.

9. The power supply unit for lighting as claimed in claim 8,

the length of the groove or hole provided in the bridge portion is longer than the length of the recess portion formed at one end of the partition wall, and the width and depth of the groove or hole provided in the bridge portion are the same as the width and depth of the recess portion formed at one end of the partition wall.

10. The power supply unit for lighting as claimed in claim 9,

the shape of the groove or hole provided in the bridge portion is the same as the shape of the recess formed at one end of the partition wall.

11. The power supply unit for lighting as claimed in claim 8,

the bridge extends to one end of the partition wall and is fitted into a recess formed at one end of the partition wall.

12. The power supply unit for lighting as claimed in claim 11,

the power supply unit for lighting further includes a wire other than the input wire;

the bridge part and the first accommodating part are separated;

a notch for leading the bridge part from the inner side of the first accommodating part to the outer side of the first accommodating part is arranged at one end of the peripheral wall of the first accommodating part;

the other electric wire is led to the concave part of the second accommodating chamber from the outside of the accommodating body across the peripheral wall of the first accommodating part, and is formed in the middle of the notch arranged at one end of the peripheral wall of the first accommodating part.

13. The power supply unit for lighting as claimed in claim 11,

the housing further includes another bridge portion that protrudes from one end of the peripheral wall of the first housing portion so as to overlap the bridge portion and that is fitted into a notch or a through hole provided in the peripheral wall;

the other electric wires enter the second storage chamber from the outside of the housing body and the housing through a slot or a hole provided in the other bridge portion.

14. The power supply unit for illumination according to claim 1 or 2,

the through hole provided in the bottom wall of the second receiving portion is gradually narrowed from the inside of the second receiving portion toward the outside of the second receiving portion.

15. The power supply unit for illumination according to claim 1 or 2,

the inner wall surface of the second receiving portion is inclined, so that the inner space of the second receiving portion is gradually narrowed toward the through hole provided in the bottom wall of the second receiving portion.

16. An illumination device, wherein the illumination device has:

a power supply unit for lighting of any one of claims 8 to 15; and

and a light source unit in which the light source circuit is disposed and which is connected to the bottom wall portion from the outside of the housing.

17. An illumination device, wherein the illumination device has:

a power supply unit for lighting of any one of claims 1 to 7; and

18. The lighting device of claim 17,

the lighting device is used by being embedded in a ceiling,

the lighting device further has:

an annular frame; and

and a plurality of leaf springs attached to the frame along a circumferential direction of the frame so as to fix the frame around the embedded hole of the ceiling.

19. The lighting device of claim 17 or 18,

the light source unit has a light source substrate on which a light emitting element included in the light source circuit is mounted.

20. A power supply unit for lighting, which supplies lighting power to a light source unit provided with a light source circuit including a light emitting element, wherein,

the power supply unit for illumination includes:

a power supply substrate provided with a lighting circuit;

an output wire electrically connecting the lighting circuit and the light source circuit to form an output path through which lighting power is output from the lighting circuit to the light source circuit;

a case having a cylindrical peripheral wall portion and a bottom wall portion formed integrally with the peripheral wall portion and closing one end of the peripheral wall portion, the case having a housing space formed therein for housing the power supply board, the light source unit being attachable to the bottom wall portion from an outside of the case, the bottom wall portion being provided with a through hole through which the output wire is inserted from the inside to the outside; and

and a housing body which is housed inside the case and has a first housing portion which houses the power supply board and a second housing portion which is partitioned from the first housing portion by a partition wall.

21. The lighting power supply unit of claim 20,

the power supply unit for illumination further includes:

a lid body that closes the other end of the peripheral wall portion;

a terminal block fixed to the cover from an outer side of the case; and

the case further includes a flange portion integrally formed with the peripheral wall portion and projecting from the other end of the peripheral wall portion perpendicularly to the central axis direction of the peripheral wall portion, a notch or a through hole through which the input wire passes from the outside to the inside is provided in the peripheral wall portion, and the lid body is coupled to the flange portion.

22. The power supply unit for illumination according to claim 21,

a vent path is formed inside the case, the vent path extending from one of the vent holes provided in each of the bottom wall portion and the peripheral wall portion to the other vent hole, or extending from one of the vent holes provided in each of the bottom wall portion and the lid body to the other vent hole.

23. The power supply unit for illumination according to any one of claims 20 to 22,

24. The lighting power supply unit of claim 20,

the power supply unit for illumination further includes:

a terminal block connected to an external power supply; and

and a lid body having a step on one surface, the lid body closing the other end of the peripheral wall portion at a portion of a surface on the opposite side of the one surface corresponding to the high step of the one surface, the terminal block being fixed to a portion of the surface on the opposite side of the one surface at least a portion of which corresponds to the low step of the one surface.

25. The lighting power supply unit of claim 20,

the power supply unit for illumination further includes:

a terminal block connected to an external power supply;

a longitudinal cover body having a blocking portion for blocking the other end of the peripheral wall portion and a fixing portion to which the terminal block is fixed, the blocking portion and the fixing portion being arranged along a longitudinal direction; and

a pair of connectors that connect the cover to the housing at positions of the blocking portion that face in a direction inclined with respect to a longitudinal direction of the cover.

26. An illumination device, wherein the illumination device has:

a power supply unit for lighting of any one of claims 20 to 23; and

a light source unit in which the light source circuit is disposed and which is connected to the bottom wall portion from the outside of the housing;

the case conducts heat generated from the light source unit during lighting of the light emitting element from a connection portion between the bottom wall portion and the light source unit to the peripheral wall portion via the bottom wall portion, thereby dissipating the heat.

27. The illumination device of claim 26,

the connecting portion between the bottom wall portion and the light source unit is located at a position overlapping the light emitting element in the central axis direction of the peripheral wall portion.

28. An illumination device, wherein the illumination device has:

a power supply unit for lighting of claim 21 or 22; and

the case dissipates heat generated from the light source unit during lighting of the light emitting element by conducting heat generated from a connecting portion between the bottom wall portion and the light source unit to a connecting portion between the flange portion and the lid body via the bottom wall portion, the peripheral wall portion, and the flange portion.

29. An illumination device, wherein the illumination device has:

a power supply unit for lighting of claim 23; and

the heat sink is connected to the peripheral wall portion;

the case dissipates heat generated from the light source unit during lighting of the light emitting element by conducting heat from a connecting portion between the bottom wall portion and the light source unit to a connecting portion between the peripheral wall portion and the heat sink via the bottom wall portion and the peripheral wall portion.

30. The lighting device of any one of claims 26 to 29,

the lighting device is used by being embedded in a ceiling,

the lighting device further has:

an annular frame; and

31. An illumination device, wherein the illumination device has:

a power supply unit for lighting of claim 24 or 25; and

the case further includes a flange portion integrally formed with the peripheral wall portion and protruding from the other end of the peripheral wall portion perpendicularly to a central axis direction of the peripheral wall portion, and the lid body is coupled to the flange portion;