JP2001307540A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a going up and down type lighting device which can be buried shallowly in a ceiling by thinning an electronic discharge lamp lighting device while maintaining a good weight balance there of. SOLUTION: The electronic discharge lamp lighting device 2 is provided between a lighting device 4 and an elevating part 1c of an electric elevating device 1. The lamp lighting device 2 comprises a rectangular case 21 consisting of at least a pair of heat radiating counter board 21a each having a heat radiating fin on their out side face, a printed circuit board 22 provided in the case 21 and a discharge lamp lighting circuit 23 packaged in the printed circuit board 22 in the way of a heat conductive mounting on the inner face of the heat radiating board 21a and another circuit parts 23b which are packaged mainly in the printed circuit board 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device which can be raised and lowered using an electric lifting device.

[0002]

2. Description of the Related Art In order to facilitate maintenance of a downlight installed on a high ceiling, a lighting device and a lighting device using an electric lifting device can be lowered to near a floor surface. Is already known.

In the above-mentioned lighting apparatus, a discharge lamp, for example, a metal halide lamp is used as a light source, and a part of the lighting apparatus is constituted by an electronic discharge lamp lighting apparatus. If the lighting device is an electronic discharge lamp lighting device, the weight can be reduced.
The electric lifting device can be driven by a small electric motor, and the electric lifting device can be made thinner and inexpensive, and the depth of the ceiling of the lighting device can be reduced.

[0004]

However, since an electronic discharge lamp lighting device uses a semiconductor switching element to perform high-frequency switching, the semiconductor switching element generates heat, so that heat must be dissipated. For the heat dissipation of the semiconductor switching element, it is most simple to mount the semiconductor switching element on a heat sink. The heat radiation plate used in this case is generally an aluminum block formed with heat radiation fins, but is large and heavy in order to increase the heat capacity.

On the other hand, when the lighting fixture and the lighting device are configured to be able to move up and down by using the electric lifting device, it is necessary to improve the weight balance of the lighting fixture and the lighting device.

Therefore, when an electronic discharge lamp lighting device is used, the arrangement of a heat radiating plate becomes a problem. In a conventional lighting device of this type, the structure of the electronic discharge lamp lighting device becomes complicated, However, there was a drawback that the cost increased. For this reason, there is also a problem in that the ceiling embedding depth is increased despite the fact that the electric lifting device can be made thinner.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting device of an up-and-down type in which the depth of embedding in a ceiling is reduced by reducing the thickness of an electronic discharge lamp lighting device while maintaining a good weight balance.

[0008]

According to a first aspect of the present invention, there is provided a lighting device having a rectangular parallelepiped shape in which at least a pair of opposing side surfaces are formed by heat radiating plates each having a heat radiating fin on an outer surface. An electric lifting / lowering device, comprising: a mounted wiring board; and a discharge lamp lighting circuit in which a heat generating circuit component is thermally mounted on the inner surface of the heat sink and mounted on the wiring substrate, and other circuit components are mainly mounted on the wiring substrate. And a lighting fixture disposed below the electronic discharge lamp lighting device.

In the present invention and the following inventions, the definitions and technical meanings of terms are as follows unless otherwise specified.

<Electronic Discharge Lamp Lighting Device> The electronic discharge lamp lighting device includes a case, a wiring board, and a discharge lamp lighting circuit.

[0011] The case has a rectangular parallelepiped shape, and at least a pair of opposing side surfaces are each formed of a heat radiating plate having heat radiating fins on the outer surface. A power line introduction hole is formed in the center of the upper surface of the case, and an output line lead hole is formed in the center of the bottom plate. If necessary, the remaining pair of opposing side surfaces can also be formed by a heat sink.

The wiring board is appropriately disposed inside the case. Of course, it goes without saying that the weight balance is arranged so that the weight balance does not collapse beyond the allowable limit. A power supply line introduced into the case through a power supply line introduction hole formed in the upper surface of the case is connected to the wiring board.

The discharge lamp lighting circuit has a power supply line connected to an input terminal, includes a heat generating circuit component and other circuit components, and is configured using a wiring path on which a wiring board is formed. The output line of the discharge lamp lighting device is led out of the wiring board, and is led out to the lighting fixture through an output line lead-out hole formed in the bottom surface of the case. The heat generating circuit component is thermally conductively fixed to the inner surface of the heat sink of the case, and is mounted on the wiring board. The heat generating circuit component may be any circuit component that generates a relatively large amount of heat and requires heat radiation through a heat radiating plate, but generally includes a semiconductor switching element. I do. In many cases, such semiconductor switching elements are connected to a circuit for switching a load current flowing through a discharge lamp at a high frequency. Other circuit components are directly mounted on the wiring board.

[0014] The electronic discharge lamp lighting device is provided below the lifting unit of the electric lifting device. At this time, it is desirable to take care not to hinder the heat radiation of the electronic discharge lamp lighting device. For example, when the elevating part and the electronic discharge lamp lighting device are appropriately separated from each other, a space is secured around the electronic discharge lamp lighting device, particularly in the upper part in the lighting state of the discharge lamp, and heat radiation is promoted.

<Regarding Lighting Apparatus> The lighting apparatus may have any configuration as long as a discharge lamp is used as a light source. For example, downlights, high ceiling reflectors and lamp holder combinations, chandeliers,
Bank lights, mixed light lighting equipment, sports lighting equipment, and the like can be used. The discharge lamp of the light source may be any discharge lamp, but is preferably a metal halide lamp.

[0016] The lighting equipment is provided below the electronic discharge lamp lighting device. At this time, it is desirable that heat is radiated from the lighting equipment as required, and that the lighting equipment does not hinder the heat radiation of the electronic discharge lamp lighting device. In order to satisfy both of them, it is preferable to mount the luminaire so that the luminaire and the electronic discharge lamp lighting device are appropriately separated from each other. If necessary, a heat shield plate can be interposed between the lighting fixture and the electronic discharge lamp lighting device.

Further, when a downlight is used as a lighting fixture, the downlight can be constituted by a frame, a reflector and a lamp holder. The frame body is fixed to the ceiling side to house the reflection shade and the lamp holder inside, and has an electric lifting device at the top. The reflector is integrated with the lamp holder and moves up and down. The lamp holder is mainly composed of a lamp socket, and is provided with a support for a reflector.

<Operation of the present invention> In the present invention, since at least one pair of opposed side plates of the case of the electronic discharge lamp lighting device is a rectangular parallelepiped formed by a heat sink, the weight distribution of the electronic discharge lamp lighting device is made. Easy to balance. Therefore, the lighting device is smoothly moved up and down.

Also, since the heat sink forms at least one pair of side surfaces of the case of the electronic discharge lamp lighting device,
The case can be made thinner, so that the ceiling embedding depth can be reduced.

Further, since the case has a rectangular parallelepiped shape, an extruded aluminum material is used for the heat radiating plate.
The case can be constructed using the heat sink, and the case components other than the heat sink can be easily punched and bent, and the case structure can be simplified and the weight can be reduced.

Furthermore, since the heat radiating plate is directly exposed to the outside, the heat radiation is good, and since the heat generating circuit components are mounted on the inner surface of the heat radiating plate, the external exposure of the charged portion can be avoided.

According to a second aspect of the present invention, there is provided a lighting apparatus having an electric lifting / lowering device installed on the ceiling side, a wire hanging down from the electric lifting / lowering device main body, and a lifting / lowering portion attached to a lower end of the wire. A rectangular parallelepiped case in which at least a pair of opposing side surfaces are respectively provided with heat radiating fins on the outer surface, a wiring board disposed in the case, and a heat generating circuit component on the inner surface of the heat radiating plate An electronic discharge lamp lighting device, which is provided with a discharge lamp lighting circuit which is thermally conductively mounted on the wiring board and other circuit components are mainly mounted on the wiring board, and which is disposed below a lifting portion of the electric lifting device. A lighting fixture disposed below the electronic discharge lamp lighting device.

According to the present invention, an electric lifting device is added to the components of the first aspect of the present invention. That is, since the electric lifting device is a part of the configuration of the lighting device, it is suitable for a configuration such as a downlight in which a part of the lighting fixture, for example, the frame is fixed to the ceiling side. In this case, the electric lifting device is disposed on the frame. However, the present invention is also applicable to a lighting fixture not having such a configuration, and for example, a configuration in which only the electric lifting device is fixed to the ceiling side may be used. Even in such a case, the lighting device is configured as a whole including the electric lifting device.

The electric lifting device is generally composed of a lifting device main body,
It is composed of a suspended body such as a wire, and a lifting unit attached to the lower end of the suspended body. The lifting device main body is connected to a hoisting device such as a rotating drum for raising and lowering the suspended body, an electric motor for driving the hoisting device, a lock mechanism for locking the lifting portion when the lifting portion is at a predetermined lifting position, and a lifting device. And a control unit for controlling the electric motor, and a terminal block for connecting a power supply line. The elevating unit includes a power receiving mechanism that comes in contact with and separates from a contact mechanism of the elevating device main body, and a support mechanism that supports the electronic discharge lamp lighting device.

According to a third aspect of the present invention, there is provided the lighting device according to the first or second aspect, wherein the electronic discharge lamp lighting device includes a power supply hole and a power supply hole having a case formed at a central portion of an upper surface thereof. A large number of cut-and-raised radiating holes which are open outward to the left and right, respectively, are sandwiched therebetween.

According to the present invention, a structure is provided in which dust hardly enters the case of the electronic discharge lamp lighting device, but promotes heat radiation. That is, the cut-and-raised heat radiation hole can be formed by making a cut line on the upper surface of the case and pushing up a portion adjacent to the cut line, and the opening thereof is substantially directed to the side. In addition, a power supply introduction hole is provided substantially at the center of the upper surface of the case. The opening of the radiating hole cut and raised at the power supply introducing hole is divided into right and left. For this reason, the cut-and-raised heat radiation hole faces the side edge of the case closer to the position.

Thus, in the present invention, since the power supply introduction hole is disposed substantially at the center of the case, the introduction of the power supply does not hinder the weight balance of the electronic discharge lamp lighting device. .

Further, the air whose temperature has risen from the inside of the electronic discharge lamp lighting device is cut and raised, and flows out of the radiating hole in the left-right direction, so that the heat radiation is improved.

Further, since the opening of the cut-and-raised heat radiation hole is formed outward, it is difficult for dust to enter the inside from the upper part of the case.

According to a fourth aspect of the present invention, in the lighting device according to any one of the first to third aspects, the electronic discharge lamp lighting device has a case in which the case is substantially parallel to the bottom plate and the opposite side edges of the bottom plate. It is characterized by being constituted by a pair of upright heat radiating plates, a pair of side portions rising from the remaining side edges of the bottom plate, and a U-shaped lid having an upper surface portion bridging the side portions integrally. .

The present invention defines a structure of a case of an electronic discharge lamp lighting device which is simple and easy to incorporate a wiring board. That is, the case can be assembled by attaching the bottom plate and the lid to the heat sink. Since the heat radiating plate can be formed by using an aluminum extruded product, the groove to be the mounting portion for the bottom plate and the lid can be formed by extrusion at the same time as the extrusion.

According to the present invention, since the lid of the case of the electronic discharge lamp lighting device is formed in a U-shape, when the lid is removed, the case is composed of a pair of a heat sink and a bottom plate. Because of the gutter shape, the work of mounting the wiring board is facilitated.

Further, since the case can be assembled simply by forming mounting holes in the bottom plate and the lid and screwing it into the heat sink using self-tapping screws, the structure of the case is simple and the assembling work is easy. And therefore cheaper.

According to a fifth aspect of the present invention, there is provided the lighting device according to any one of the first to fourth aspects, wherein the lifting portion of the electric lifting device and the case of the electronic discharge lamp lighting device are separated from each other. 5. A first mounting bracket, comprising: a first mounting bracket to be connected to the case; and a second mounting bracket for separately connecting the case of the electronic discharge lamp lighting device and the lighting fixture. The lighting device according to any one of the above.

The present invention defines a structure in which the lifting unit, the electronic discharge lamp lighting device, and the lighting fixture of the motorized lifting device are mounted separately from each other. That is, the elevating unit and the electronic discharge lamp lighting device are mounted separately from each other by using the first mounting bracket. In addition, the electronic discharge lamp lighting device and the lighting fixture are mounted separately using the second mounting bracket. If necessary, it becomes easy to interpose a heat shield between the electronic discharge lamp lighting device and the lighting equipment. Thus, in the present invention, it is possible to obtain a lighting device having a simple structure in which the electric lifting device, the electronic discharge lamp lighting device, and the lighting fixture are separated from each other to reduce thermal interference. it can.

[0036]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially sectional front view showing a lifting downlight as an embodiment of a lighting device according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view showing a state in which a part is similarly removed.

FIG. 4 is an exploded perspective view.

FIG. 5 is a sectional view of a main portion of the electronic discharge lamp lighting device.

FIG. 6 is a plan view of the lid similarly.

FIG. 7 is a side view of the lid.

FIG. 8 is an explanatory view for explaining the state of attachment of the lid.

FIG. 9 is a plan view of the bottom plate.

FIG. 10 is a front view of the bottom plate.

FIG. 11 is a side view of the bottom plate.

In each of the figures, reference numeral 1 denotes an electric lifting device, 2 denotes an electronic discharge lamp lighting device, 3 denotes a first mounting bracket, 4 denotes a lighting fixture, 5 denotes a second mounting bracket, and 6 denotes a heat shield plate. .

<Regarding the Electric Lifting Apparatus 1> The electric lifting apparatus 1 includes an electric lifting apparatus main body 1a, a hanging wire 1b, and a lifting section 1c. The electric lifting device main body 1a
It includes a lunch box-shaped case 1a1, an induction pulley 1a2, a winding drum 1a3, a power supply contact mechanism (not shown), a lock mechanism, an electric motor, a control device, a terminal block, and the like. The power supply contact mechanism supplies power to the elevating unit 1c when the elevating unit 1c is ascending to a predetermined position. The lock mechanism locks the elevating unit 1c at the ascending position. The electric motor drives the winding drum 1a3. The control device controls the electric motor. The terminal block connects the power line received from the ceiling to the electric lifting device 1.

One end of the suspension wire 1b is fixed to the winding drum 1a3. The other end of the other end is fixed to the elevating unit 1c via the guide pulley 1a2.

The elevating unit 1 c has a power receiving mechanism (not shown) and a support mechanism for the electronic discharge lamp lighting device 2. The power receiving mechanism contacts the power supply contact mechanism of the electric lifting / lowering apparatus main body 1a and receives power when the lifting / lowering unit 1c is at a predetermined lifting position.

<About the electronic discharge lamp lighting device 2>
The appearance of the electronic discharge lamp lighting device 2 is shown in FIGS. 1 to 4 and the details thereof are shown in FIGS. 5 to 11. That is, a case 21, a wiring board 22, and a discharge lamp lighting circuit 23 are provided.

(Case 21) The case 21 has a box-shaped rectangular parallelepiped shape, and includes a pair of heat radiating plates 21a, 21a, a bottom plate 21b, and a U-shaped lid 21c forming a pair of side surfaces.

A pair of radiating plates 21a, 21a are composed of a radiating fin 21a1, a first long groove 21a2, and a second long groove 21a.
3. Third long groove 21a4, dovetail groove 21a5, locking groove 21a
6 and a screw hole 21a7. The radiating fins 21a1 function to radiate the heat generated by the heat generating circuit component 23a, which will be described later, and are formed in a large number on the outer surface of the radiating plate 21a. The first long groove 21a2 functions to fix a bottom plate 21b, which will be described later, and is formed so as to open on the lower surface in the longitudinal direction of the heat radiating plate 21a.
The second long groove 21a3 functions to fix an upper surface portion 21c2 of a U-shaped lid 21c, which will be described later, and is formed to be open on the upper surface in the longitudinal direction of the heat sink 21a. Third
The long groove 21a4 functions to lock a wiring board 22 described later, and is formed on the inner surface of the heat radiating plate 21a relatively close to and substantially parallel to the first long groove 21a2. I have. The dovetail groove 21a5 is provided with a bolt 23 described later.
It functions to support d slidably, and is formed along the longitudinal direction on the inner surface of the heat sink 21a. The locking groove 21a6 functions to lock a holding plate 23c described later, and is formed parallel to the dovetail groove 21a5. The screw hole 21a7 is provided with a U-shaped lid 21c described later.
And two of them are formed along the longitudinal direction of the heat radiating plate 21a.

As shown in FIGS. 6 to 8, the bottom plate 21b includes a plurality of through holes 21b1, an output line lead-out hole 21b2, a plurality of mounting holes 21b3, a plurality of studs 21b4, and a pair of upright edges 21b5, 21b5. I have. As shown in FIG. 5, the plurality of through-holes 21b1 are formed on the bottom plate 21b by the self-tapping screw sts.
It functions when fixed to 1a2, and is formed along the front and rear facing side edges of the bottom plate 21b. Output line outlet 2
Reference numeral 1b2 functions to lead an output line (not shown) of the discharge lamp lighting circuit 23 connected to the wiring board 22 to the lighting fixture 4, and is formed at the center of the bottom plate 21b. The plurality of mounting holes 21b3 function to mount the second mounting bracket 5, and the output line leading holes 21b
They are equally arranged on a concentric circle centered at 2. The plurality of studs 21b4 function to fix the wiring board 22, and are distributed and arranged at the peripheral edge and the center of the bottom plate 21b. The upright edge 21b5 has a U-shaped lid 21c.
The bottom plate 21b is provided with a pair of screw holes sh1 that stand low from the left and right opposing side edges of the bottom plate 21b.

The U-shaped lid 21c has a pair of side portions 21c.
1, 21c1 and an upper surface portion 21c2 to form a U-shape. The pair of side portions 21c1, 21c1 stand parallel to each other from the remaining side edges perpendicular to the pair of heat radiating plates 21a, 21a standing from the pair of opposite side edges of the bottom plate 21b of the case 21 to form a plurality of channels. A plurality of through holes th1 and th2 are provided in the pore bh and the peripheral portion, respectively. As shown in FIG. 11, the plurality of through holes th1 are
It functions when fixing 1 to the screw hole 21a7 of the heat sink 21a with the self-tapping screw sts. Although not shown, the plurality of through holes th2 function when the side surface portion 21c1 is fixed to the pair of screw holes sh1 of the upright edge 21b5 of the bottom plate 21b by a self-tapping screw. As shown in FIG. 9, the upper surface portion 21c2 has a pair of side surface portions 21c.
1, 21c1 are bridged, and have a power supply line introduction hole slh, a plurality of screw holes sh2, a plurality of through holes th3, and a large number of cut-and-raised heat radiation holes cuh1, cuh2. The power supply line introduction hole slh functions to introduce a power supply line, and is formed at the center of the upper surface 21c2. The plurality of screw holes sh2 function to mount the first mounting bracket 3, and are formed on the upper surface portion 21c2 on the left and right of the power supply line introduction hole slh. Multiple through holes th3
As shown in FIG. 5, the U-shaped lid 21c is fixed to the second long groove 21 of the heat sink 21a by the self-tapping screw sts.
a3, which functions to fix to the upper surface portion 21c2.
Are formed along the front and rear side edges. A large number of cut-out heat releasing holes cuh1 are shown in FIG.
h, it is formed downward to the lower half of the upper surface portion 21c2. On the other hand, the cut-and-raised heat radiation hole cuh2 is
The upper half is formed facing upward.

<Regarding Wiring Board 22> Wiring Board 22
Is a heating circuit component 2 of the discharge lamp lighting circuit 23 described later.
It functions to mount 3a and other circuit components 23b, and is fixed to the bottom plate 21b while being locked to the pair of heat radiating plates 21a. That is, the front and rear side edges of the wiring board 22 are located on the third long grooves 21 of the heat sink 21a.
a4 and 21a4, the bolt B is inserted through a through hole (not shown) facing the stud 21b4 of the bottom plate 21b.
Is fixed by screwing.

<Regarding the discharge lamp lighting circuit 23> As shown in FIG. 5, the discharge lamp lighting circuit 23 includes a heating circuit part 23a, other circuit parts 23b, a holding plate 23c,
The wiring board 2 is provided with bolts 23d and nuts 23e.
It is configured by being connected as required by two wiring paths. The circuit configuration will be described later.

The heat generating circuit component 23a is a circuit component that requires a large amount of heat and needs heat radiation through the heat radiating plate 21a, such as a semiconductor switching element. The heating circuit component 23a includes the holding plate 23c and the bolt 2
It is thermally conductively attached to the inner surface of the heat radiating plate 21a via the 3d and the nut 23e, but is mounted on the wiring board 22.

The other circuit components 23b include a heat sink 21a
This is a circuit component that generates a relatively small amount of heat that does not necessarily require heat radiation through the circuit board, and is directly mounted on the wiring board 22.

The holding plate 23c has an L-shaped leg piece 23c1 and a contact piece 23c2, and a contact piece 23c2.
Are formed with through holes. The tip of the leg piece 23c1 is locked in the locking groove 21a6 of the heat sink 21a.
3c2 is in contact with the heat generating circuit component 23a.

The head 23d1 of the bolt 23d is
1a is slidably inserted into the dovetail groove 21a5,
3c is inserted through the through hole of the contact piece 23c2.

The nut 23e is screwed into the bolt 23d to press the holding plate 23c against the heat generating circuit component 23a.

<Regarding First Mounting Bracket 3> The first mounting bracket 3 functions to separate and fix the lifting / lowering portion 1c of the electric lifting / lowering device 1 and the electronic discharge lamp lighting device 2 separately. As shown in FIG. 1 and FIG. 4, it is composed of an upper side 3a and a side 3b. The upper side 3a has a through hole 3a at the center.
1 and a plurality of through holes th4 around the through hole 3a1. The side portion 3b hangs from both ends of the upper side portion 3a, and an L-shaped portion 3b1 having a through hole th5 at a lower end is formed.

Then, the lifting unit 1c is fixed by a screw (not shown) using the through hole th4 in a state where the lifting unit 1c is fitted into the through hole 3a1 of the upper side 3a. Also, the side portion 3b
Is fixed to the plurality of screw holes sh2 of the U-shaped cover 21c of the case 21 of the electronic discharge lamp lighting device 2 with screws (not shown), so that the elevating portion 1c and the electronic discharge lamp lighting device are 2 and are fixed apart from each other.

<Regarding Lighting Apparatus 4> The lighting apparatus 4 includes a frame 4a, a reflector 4b, a lamp holder 4c, and a discharge lamp 4d.

The frame 4a includes an annular frame 4a1 and a gate-shaped frame 4
a2. The annular frame 4a1 has a flange f
In a state where the flange f is in contact with the lower surface of the opening of the ceiling panel 7, the electric lifting device 1 is fixed by being suspended from the ceiling slab by suspension bolts (not shown). The gate-shaped frame 4a2 includes an upper side 4a21 and a pair of leg sides 4a22, 4a22.
At the tip of the leg side 4a22. Upper part 4
In a21, an opening op having a size through which the elevating unit 1c can pass is formed at the center, and the electric elevating device 1 is mounted on the upper part by adjusting the elevating unit 1c to the opening op.

The reflection plate 4b has a shape of a folding bowl, and has a decorative flange of on the periphery of the lower end opening. The decorative flange of is formed so as to cover the flange f of the annular frame 4a1 of the frame 4a when the reflector 4b is installed at a predetermined position.

The lamp holder 4c includes a lamp socket mounting plate 4c1, a reflector mounting plate 4c2, and a lamp socket 4c.
3 and a pair of bolts 4c4. The lamp socket mounting plate 4c1 is fixed to the lower surface of a second mounting member 5 described later, and the lamp socket 4c3 is mounted on the lower surface. The reflector mounting plate 4c2 is the lamp socket mounting plate 4.
A pair of legs 4c2 that hang down in parallel from both sides of c1
1 and 4c21 and an annular portion 4c22 disposed at the lower end of the pair of legs 4c21 and 4c21. Annular part 4
c22 fixes the top of the reflection plate 4b to its lower surface. The pair of bolts 4c4 fix the lamp 4 to the second mounting member 5 by fixing the lamp socket mounting plate 4c1 to the second mounting member 5.

The discharge lamp 4d is a metal halide lamp mounted on the lamp socket 4c3.

<Regarding the Second Mounting Bracket 5> The second mounting bracket 5 fixes the electronic discharge lamp lighting device 2 and the luminaire 4 apart from each other, and fixes the heat shield plate 6 as necessary. It is interposed between the two, and comprises a lower side 5a, a leg side 5b, and an abutment 5c. The lower side 5a is the lamp holder 4
c is fixed to the lamp socket mounting plate 4c1 by a screw (not shown). The leg side 5b stands upright in parallel from both sides of the lower side 5a. The contact portion 5c extends outward from the upper end of the leg side portion 5b, and is fixed to the plurality of mounting holes 21b3 of the bottom plate 21b of the case 21 of the electronic discharge lamp lighting device 2 with screws.

<About the heat shield plate 6> The heat shield plate 6 is sandwiched between the second mounting member 5 and the lamp holder 4c.
The heat generated by the lighting device 4 is shielded so as not to heat the electronic discharge lamp lighting device 2 as much as possible.

FIG. 12 is a circuit block diagram of an embodiment of the lighting device of the present invention.

In the figure, the same parts as those in FIGS. 1 to 11 are denoted by the same reference numerals, and description thereof is omitted.

In the main body 1a, the winding drum 1a3 is driven by the electric motor M. When the movable contact MC is connected to the ascending circuit contact RUC, the motor M
b is wound up and the elevating unit 1c is raised. Movable contact M
When C is connected to the descending contact RDC, the elevating unit 1c descends. The security contact SC is inserted in series into the common line of the electric motor M, and is controlled by the lighting determination circuit LDC. Therefore, when the discharge lamp 4d is lit, the security contact SC is controlled and opened by the lighting determination circuit LDC, and the motor M does not operate.

The discharge lamp lighting circuit 23 includes an AC power supply AS
Is supplied only through the power feeding contact mechanism FIC of the electric lifting / lowering apparatus main body 1a and the power receiving contact mechanism RC of the lifting / lowering section 1c, and only when the lifting / lowering section 1c is raised to a predetermined position. The discharge lamp lighting circuit 23 includes a filter circuit FC, a rectified DC power supply RDC, a step-up chopper circuit BUT, a step-down chopper circuit BDT, and a polarity switching circuit PC, and includes a step-up chopper circuit BUT and a step-down chopper circuit B.
DT is controlled via the control circuit CC in accordance with the detection output of the lighting determination circuit LDC, and the discharge lamp 4d lights stably.

[0077]

According to the first to fifth aspects of the present invention, the electronic discharge lamp lighting device interposed between the elevating portion of the electric lifting device and the lighting fixture has at least a pair of opposed side surfaces. A rectangular parallelepiped case composed of a radiator plate with radiator fins on the side surface, a wiring board disposed in the case, and a heat-generating circuit component are mounted on the inner surface of the radiator plate by heat conduction and mounted on the wiring board. Since the circuit components are mainly provided with the discharge lamp lighting circuit mounted on the wiring board, it is possible to provide a lighting device having the following effects.

1. Since the case of the electronic discharge lamp lighting device has a rectangular parallelepiped shape in which a pair of side surfaces is formed by a heat sink, it is easy to balance the weight distribution of the electronic discharge lamp lighting device. Therefore, the lighting device is smoothly moved up and down.

2. Since the heat radiating plate forms at least one pair of side surfaces of the case, the case can be made thinner, and thus the ceiling embedded depth can be reduced.

3. Since the case has a rectangular parallelepiped shape, the extruded aluminum material is used for the heat sink, and the heat sink can be used to construct the case. The case components other than the heat sink are easily punched and bent, and the like. The structure of the case is simplified, and the weight can be reduced.

4. Since the heat radiating plate is directly exposed to the outside, good heat radiation is achieved, and since the heat generating circuit components are mounted on the inner surface of the heat radiating plate, the external exposure of the charged portion can be avoided.

According to the first aspect of the present invention, it is possible to provide a lighting device which does not include a motorized lifting device as a component.

According to the second aspect of the present invention, it is possible to provide an illuminating device including a motorized lifting device as a component.

According to the third aspect of the present invention, in addition to the above, the case of the electronic discharge lamp lighting device has a power supply hole formed at the center of the upper surface thereof, and a left and right side with the power supply hole interposed therebetween. By providing a large number of cut-and-raised heat-dissipating holes, the power supply introduction hole is arranged almost at the center of the case, so that the introduction of power supply may impair the weight balance of the electronic discharge lamp lighting device. In addition, since the air whose temperature has risen from the inside of the electronic discharge lamp lighting device cuts and rises and flows out of the radiating hole in the left and right direction, the heat radiation is improved, and the radiating hole has the opening. Is formed outwardly, it is possible to provide a lighting device in which dust hardly enters from the upper part of the case to the inside.

According to the fourth aspect of the present invention, in addition to the above, the case of the electronic discharge lamp lighting device has a bottom plate, a pair of heat radiating plates standing almost in parallel from the opposing side edges of the bottom plate, and the remaining side edges of the bottom plate. The case of the electronic discharge lamp lighting device is formed in a U-shape by being constituted by a U-shaped cover having a pair of standing side portions and an upper surface portion bridging the side portions integrally. When the lid is removed, the case is formed in a gutter shape by the pair of heat radiating plate and the bottom plate, so that the work of mounting the wiring board becomes easy, and the mounting holes are formed in the bottom plate and the lid. And the case can be assembled simply by screwing it into the heat sink using a self-tapping screw, so that the structure of the case is simple and the assembling work is easy, and therefore an inexpensive lighting device is provided. Door can be.

According to the fifth aspect of the present invention, in addition to the above, the first mounting bracket for connecting the lifting part of the motorized lifting device and the case of the electronic discharge lamp lighting device separately from each other, and the electronic discharge lamp lighting device And a second mounting bracket for separating and coupling between the case and the luminaire,
With a simple structure, it is possible to provide a lighting device in which the electric lifting device, the electronic discharge lamp lighting device, and the lighting fixture are separated from each other to reduce thermal interference.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing a lifting downlight as an embodiment of a lighting device of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view showing a state where a part of the same is removed.

FIG. 4 is an exploded perspective view of the same.

FIG. 5 is a sectional view of a main part of the same electronic discharge lamp lighting device.

FIG. 6 is a plan view of the lid.

FIG. 7 is a side view of the lid.

FIG. 8 is an explanatory view for explaining an attached state of the lid body.

FIG. 9 is a plan view of the same bottom plate.

FIG. 10 is a front view of the same bottom plate.

FIG. 11 is a side view of the bottom plate.

FIG. 12 is a circuit block diagram of a lighting device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electric lift device 2 ... Electronic discharge lamp lighting device 21 ... Case 21a ... Heat sink 21c ... U-shaped lid 21c1 ... Side surface part 21c2 ... Top surface part 3 ... 1st mounting bracket 4 ... Lighting equipment 4a ... Frame 4b: Reflector 4c: Lamp holder 4d: Discharge lamp 5: Second mounting bracket 6: Heat shield

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shun Abe 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Toshiba Litec Corporation F-term (reference) 3K014 AA01 EA01 LA01 LB04

Claims (5)

[Claims] 1. A rectangular parallelepiped case in which at least a pair of opposing side surfaces is formed of a heat radiating plate having heat radiating fins on an outer surface, a wiring board disposed in the case, and a heat generating circuit component formed of a heat radiating plate. An electronic discharge lamp provided with a discharge lamp lighting circuit that is thermally conductively mounted on the inner surface and mounted on a wiring board and other circuit components are mainly mounted on the wiring board, and is disposed below a lifting portion of the electric lifting device. A lighting device, comprising: a lighting device; and a lighting device disposed below the electronic discharge lamp lighting device. 2. An electric lifting / lowering device having a main body mounted on the ceiling side, a wire suspended from the main body of the electric lifting / lowering device, and a raising / lowering portion attached to a lower end of the wire; A rectangular parallelepiped case in which the side surfaces are each formed of a heat sink having heat-dissipating fins on the outer surface, a wiring board disposed in the case, and a wiring board in which the heat generating circuit components are thermally conductively attached to the inner surface of the heat sink. An electronic discharge lamp lighting device provided with a discharge lamp lighting circuit in which other circuit components are mainly mounted on a wiring board, and which is disposed below a lifting portion of an electric lifting device; and an electronic discharge lamp lighting device. And a lighting device disposed below the lighting device. 3. The electronic discharge lamp lighting device according to claim 1, wherein the case has a power supply hole formed in a central portion of an upper surface thereof and a plurality of cut-and-raised heat radiation holes opened to the right and left outward with respect to the power supply hole. The lighting device according to claim 1, further comprising: 4. The electronic discharge lamp lighting device according to claim 1, wherein the case has a bottom plate, a pair of heat radiating plates rising substantially parallel from opposing side edges of the bottom plate, and a pair of side portions and side surfaces rising from the remaining side edges of the bottom plate. The lighting device according to any one of claims 1 to 3, wherein the lighting device is configured by a U-shaped lid having an upper surface portion bridging the portions integrally. 5. A first mounting bracket for separating and connecting a lifting portion of an electric lifting device and a case of an electronic discharge lamp lighting device; and a separation between a case of an electronic discharge lamp lighting device and a lighting fixture. The lighting device according to any one of claims 1 to 4, further comprising: a second mounting bracket that is coupled to the lighting device.