JP2531566B2 - Lighting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device capable of automatically raising and lowering a lighting fixture, keeping it raised to the ceiling side during use, and lowering it when necessary.

[0002]

2. Description of the Related Art Conventionally, luminaires such as incandescent lamps and fluorescent lamps are generally installed in fixed positions on indoor ceilings.

[0003]

However, when the lighting fixture is fixedly installed at a fixed position on the ceiling as in the above-mentioned conventional example, a light bulb such as an incandescent light bulb or a fluorescent light is newly installed at the time of installation, or a light bulb after installation. In the case of replacing, or cleaning the lighting equipment, changing the number of fluorescent lamps used, or replacing the entire lighting equipment, you must use a stepladder to perform those operations. Not only is it laborious and inferior in workability, but it is also dangerous.

The present invention is to solve the above-mentioned conventional problems, in which the luminaire is held in a raised state on the ceiling side, and a new light bulb such as an incandescent light bulb or a fluorescent light is attached.
Allows the luminaire to be lowered when replacing light bulbs, cleaning luminaires, changing the number of fluorescent lamps used, or replacing the entire luminaire, so that these operations can be performed on a stable surface such as on the floor. So anyone can easily and quickly
Moreover, it can be performed safely, and the lighting fixture is automatically moved up and down. Therefore, the lifting and lowering work of the lighting fixture can be performed quickly and efficiently, and further,
It is possible to hold the flexible linear material that suspends the lighting fixture in an orderly wound state without slacking, and therefore, it is possible to raise and lower the lighting fixture smoothly and reliably even if the lifting work of the lighting fixture is repeated. It is an object of the present invention to provide a lighting device capable of improving reliability.

[0005]

The technical means of the present invention for achieving the above object is to provide a lighting fixture, a flexible linear member for suspending the lighting fixture, and the flexible linear member. A winding cylinder that winds so that it can be paid out, a spring that constantly biases the winding cylinder in the winding direction of the flexible linear material, a motor for winding up and paying out the flexible linear material, and a drive for this motor A flexible roller is fed from the winding drum against the elasticity of the spring, or has a feed roller for feeding the winding wire to the winding drum so that the flexible linear member is wound up by utilizing the elasticity of the spring. A lifting device that selectively winds and unwinds the flexible linear material by driving a motor and holds the lighting fixture in the use state by raising it to the ceiling side or lowering it. is there.

It is preferable to use a constant force spring as the spring.

Further, the flexible linear member is formed of a material such as a wire for exclusive use of suspension other than the power cord, is provided on the side of the lighting fixture, and is electrically connected to the electrode of the electric bulb for supplying power. Can be provided on the ceiling side when the lighting fixture is raised, and can be configured to be electrically connected to an electric contact for power supply, which is connected to a power supply. Further, at least one of the electrical contact for power supply on the lighting fixture side and the electrical contact for power supply on the ceiling side is formed in a ring shape, or the electrical contact for power supply on the lighting fixture side and the ceiling side. It is preferable that one of the electric contacts for power supply is formed in a ring shape and the other is arranged at a plurality of positions on the circumference of the ring. In addition, it is preferable to provide a spring on the end portion side of the flexible wire member that pressurizes the electric contact for power supply on the side of the luminaire to the electric contact for power supply on the ceiling side when the luminaire is raised. .

Further, a power cord is used for the flexible linear material, and a slip ring provided on a rotatable winding drum, to which a metal wire of the power cord is connected, and a brush which is in contact with the slip ring are provided. The luminaire and the power source can be connected via the luminaire.

[0009]

According to the present invention constructed as described above, by driving the motor of the elevating device, the flexible linear member is automatically paid out and the lighting fixture raised to the ceiling side is lowered. Further, by driving the motor of the elevating device, the flexible linear material can be automatically wound up, and the lighting fixture can be raised to the ceiling side and held in the used state. In this way, the lighting fixtures that have been raised to the ceiling side and kept in use can be lowered as necessary, so that new bulbs such as incandescent bulbs and fluorescent bulbs can be newly installed, bulbs can be replaced, and lighting fixtures can be cleaned. It is possible to perform operations such as changing the number of fluorescent lamps used and replacing the entire lighting fixture in a stable state on the floor. In addition, the lighting fixture can be automatically moved up and down without the need for manpower. Furthermore, since the winding cylinder that winds the flexible linear material so that it can be paid out is constantly urged in the winding direction of the flexible linear material by a spring, tension is applied to the flexible linear material. It can be held in an orderly rolled state without sagging.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. 1 is a schematic explanatory view showing a lighting device according to a first embodiment of the present invention, FIG. 2 is a bottom view showing the lighting device,
FIG. 3 shows the same illuminating device, a sectional view of a central portion of the luminaire in the middle of being lowered, FIG. 4 is a partially cutaway plan view showing an elevating device of the same illuminating device, and FIG. 5 shows the same illuminating device. FIG. 3 is a front view of the lighting device shown in FIG.

As shown in FIGS. 1 to 5, a rectangular hole 2 is formed in a ceiling panel 1. The support frame 3 is formed in a rectangular shape so that the peripheral wall can be fitted to a reflection plate (shade) 6 of the lighting fixture 5 described later, and the interval is gradually reduced as the long side wall extends from the lower end open side to the upper end. The upper surface is horizontally formed with a short vertical projection upward, and the collar-shaped portion 4 is formed on the outer periphery of the lower end.
The support frame 3 is inserted into the hole 2 of the ceiling panel 1 from the upper surface side, the collar-shaped portion 4 is engaged with the outer peripheral edge portion of the hole 2 on the lower surface of the ceiling panel 1, and is fixed by a mounting means such as a screw. There is.

The lighting fixture 5 is, for example, a fluorescent lamp 64.
Is used, and its base is pointed to the socket 63 provided inside the reflection plate 6. With the reflection plate 6 inserted in the support frame 3, the collar-shaped portion 7 on the outer periphery of the lower end is engaged with the lower surface of the collar-shaped portion 4 of the support frame 3, and electrical contacts for power supply are provided between the horizontal upper plates. A space for providing the space is formed. An insulating substrate 8 is fixed on the upper surface plate of the reflection plate 6. A shallow recess 12 is formed on the upper surface of the insulating substrate 8, and a pair of conductive plates 1 is formed in the recess 12.
3 and 14 are separated from each other and mounted in an electrically insulated state, and the upper surface of the insulating substrate 8 and the upper surfaces of the conductive plates 13 and 14 are set to be flush with each other. A small-diameter hole is formed in the insulating substrate 8 and the conductive plate 13 so as to communicate with each other.
And a small diameter hole is formed in the conductive plate 14 in a communicating state. Conducting members 15 and 16 electrically connected to the electrodes of the incandescent light bulb 11 are inserted into the small-diameter holes, and the conducting members 15 and 16 are inserted.
The projecting portions of the above are crimped and locked to the conductive plates 13 and 14, and the conductive members 15 and 16 are electrically connected to the conductive plates 13 and 14, respectively. Insulating substrate 8 and conductive plate 1
Insulating rings 17 and 18 are concentrically fixed on the upper surfaces of 3 and 14, and ring-shaped grooves 19 and 20 formed on the upper surfaces of the insulating rings 17 and 18 have ring-shaped electric contacts 21 for power supply, 22 is attached. The conducting portion 23 protruding from the electric contact 21 is inserted into a small-diameter hole formed in the conductive plate 13, and the protruding end portion is caulked to be housed in the recess formed in the insulating substrate 8. The caulking portion Are locked to the conductive plate 13 and electrically connected to the conductive plate 13. Similarly, the conducting portion 24 protruding from the electrical contact 22 is inserted into the small diameter hole formed in the conductive plate 14, the protruding end portion is caulked, and is housed in the recess formed in the insulating substrate 8. The caulking portion is locked to the conductive plate 14 and electrically connected to the conductive plate 14. Therefore, of the pair of electric contacts 21 and 22, one electric contact 21 is electrically connected to one electrode of the fluorescent lamp 64 via the conductive plate 13 and the conductive member 15, and the other electric contact 22 is the conductive plate. 14, and electrically connected to the other electrode of the fluorescent lamp 64 via the conductive member 16. Locking frames 25 are fixed to the upper surface of the lighting fixture 5 at both sides on the short side. A groove 26 communicating from the center of the upper surface of the locking frame 25 to the center of one side surface is formed, and a hole 27 having a diameter larger than the width of the groove 26 is formed in the center portion of the one side surface. It is in communication.

Insulating plates 28 and 29 are fixed to the lower surface of the upper plate of the support frame 3 at one position on the circumference of the insulating rings 17 and 18, respectively, and the insulating plate 28 is attached to the upper surface of the upper plate of the support frame 3. , 29, the insulating plates 30 and 31 are fixed. Electrical contacts 34 and 35 for power supply are attached to recesses 32 and 33 formed on the lower surfaces of the insulating plates 28 and 29. On the insulating plates 30 and 31, a conductive plate 36,
37 is attached. The conductive portion 38 protruding from the electrical contact 34 includes an insulating plate 28, a top plate of the support frame 3,
It is inserted into a small-diameter hole formed so as to communicate with the insulating plate 30 and the conductive plate 36, the protruding portion thereof is caulked and locked to the conductive plate 36, and the electrical contact 34 is electrically connected to the conductive plate 36. Has been done. The conducting portion 39 protruding from the electrical contact 35 is inserted into a small diameter hole formed in communication with the insulating plate 29, the upper surface plate of the support frame 3, the insulating plate 31 and the conductive plate 37, and the protruding portion is caulked. Conducted plate 3
7, the electric contact 35 is electrically connected to the conductive plate 37. Power cord 4 on each conductive plate 36, 37
One end of each of 0 and 41 is connected, the power cords 40 and 41 are wired on the back side of the ceiling or the like, and the other ends of the power cords 40 and 41 are connected to a power source through a switch attached to a wall surface in the room.

The luminaire 5 is housed inside the support frame 3, and the collar-shaped portion 7 of the reflector 6 is engaged with the collar-shaped portion 4 of the support frame 3 so that the pair of luminaires 5 on the side of the luminaire 5 can be accommodated. The electrical contacts 21 and 22 are brought into contact with the pair of electrical contacts 34 and 35 on the side of the support frame 3, and thus the electrodes of the fluorescent lamp 64 are electrically connected to the power source via the switch. At this time, as described above, the pair of electrical contacts 21 on the lighting fixture 5 side,
Since 22 is formed in a ring shape, even if the luminaire 5 rotates around the vertical axis and is housed in the support frame 3, it reliably contacts the pair of electrical contacts 34, 35 on the support frame 3 side. To do. The pair of electrical contacts 34, 35 on the support frame 3 side may be formed in a ring shape, and the pair of electrical contacts 21, 22 on the lighting fixture 5 side and the pair of electrical contacts 34, 35 on the support frame 3 side may be formed. It is preferable to form at least one of them in a ring shape. In addition, one of the pair of electrical contacts 21, 22 on the side of the lighting fixture 5 or one of the pair of electrical contacts 34, 35 on the side of the support frame 3 is formed in a ring shape, and the other pair of electrical contacts 34, 35, or 21, By arranging 22 at a plurality of positions on the circumference of the ring, it is possible to bring them into contact with each other more reliably.

In this embodiment, a wire 42 is used as a flexible linear member for suspending the lighting fixture 5, and a spherical portion 43 is formed at the tip of the bifurcated branch portion on the tip side of the wire 42. . The end of the wire 42 and the spherical portion 43 are inserted into the locking frame 25 through the groove 26 and the hole 27 of the locking frame 25, and the spherical portion 43 is positioned above the locking frame 25 at the center of the locking frame 25. It is locked to the inner surface of the face plate to prevent it from coming off. Therefore, the lighting fixture 5 is suspended by the wire 42. On the contrary, the inner surface of the upper plate of the locking frame 25 is separated from the spherical portion 43 of the wire 42, and the end of the wire 42 and the spherical portion 43 are separated from each other.
The groove 26 and the hole 27 of FIG.

A cover 44 is mounted on the support frame 3. A support shaft 46 is attached to the central portion of the cover 44, and a barrel 48 is rotatably supported on the support shaft 46 via bearings 47 to form a winding barrel 45. If a fluorescent lamp 64 is used as the luminaire 5, it becomes long, so 2
I try to hang it in a stable state at some point. The wire 42 is wound around the center of the body 48 so that the wire 42 can be paid out. A support shaft 65 parallel to the support shaft 46 is attached to one side of the cover 44. Bearing 66 on the end of support shaft 65
A body 67 is rotatably supported via. One end of a constant load spring 68 is connected to the end of the body 48, the other end of the constant load spring 68 is connected to the body 67, and the constant load spring 68 is wound around the body 67 side in advance, and the body 48 is connected to the wire 42. Is biased in the winding direction. First parallel to the support shaft 46
The feed roller 69 and the second feed roller 70 are provided. The first feed roller 69 is attached to the cover 44. The second feed roller 70 is rotatably supported by a shaft 71 attached to the cover 44 via a bearing. A pair of collar-shaped portions 73 is provided on the outer circumference of the first feed roller 69.
Are integrally provided, and a part of the outer circumference of each collar-shaped portion 73 is inserted so as to engage with a pair of grooves 74 formed on the outer circumference of the second feed roller 70, and the wire 4 fed from the barrel 48 is fed.
2 is between the pair of collar-shaped portions 73 and the first and second feed rollers 6
9 and 70 are sandwiched between them, and the collar-shaped portion 73 prevents the wire 42 from coming off the first and second feed rollers 69 and 70.

Therefore, the second feed roller 70 is shown in FIG.
By being rotated clockwise at
Is forcibly fed downward by the first feed roller 69, and the constant force spring 68 is fed out against the elasticity.
The wire 42 is paid out from the barrel 48 while the barrel 48 is rotated counterclockwise. On the contrary, the second feed roller 70 is rotated counterclockwise in FIG.
When 2 is pushed up, the constant force spring 68 is rewound to the body 67 side by its restoring elasticity, and accordingly,
As the body 48 is rotated clockwise, the wire 42
It is rolled up to 8.

A DC motor 7 is provided inside the end of the cover 44.
5 is supported, and the output shaft 76 of the motor 75 is supported by the cover 44 in parallel with the second feed roller 70 and the like. The belt 77 is attached to the pulley 77 mounted on the output shaft 76 and the pulley 78 mounted on the second feed roller 70.
It is multiplied by 9. Therefore, by driving the motor 75, the second feed roller 70 moves clockwise in FIG.
Or it is rotated counterclockwise. The motor 75 is drive-controlled by operating a switch provided on the indoor wall surface or the like as described above, or remotely controlled by optical communication.

The operation of the above arrangement will be described below. Now, it is assumed that the luminaire 5 is raised and is held in the supporting frame 3, that is, the usage state stored in the ceiling panel 1 (see FIGS. 1 and 5). In this state, the motor 75 is driven by operating a switch or a remote control device, and the output shaft 76 and the pulley 77 are driven.
3 is rotated clockwise in FIG. 3, and the pulley 78 and the second feed roller 7 are rotated via the belt 79 as described above.
Rotate 0 clockwise. Accordingly, the wire 42 is forcibly fed downward in cooperation with the first feed roller 69,
The constant force spring 68 is extended from the barrel 67, the wire 42 is extended while rotating the barrel 48, the lighting fixture 5 is lowered, and the pair of electrical contacts 21 and 22 on the lighting fixture 5 side is set to a pair on the support frame 3 side. Separated from the electrical contacts 34, 35,
The electrodes of the fluorescent lamp 64 are cut off from the power supply. By lowering the luminaire 5 in this manner, the base of the fluorescent lamp 64 is newly screwed into the socket 63 on the floor, or the base of the used fluorescent lamp 64 is removed from the socket 63, and the new fluorescent lamp 64 The base can be screwed into the socket 63 for replacement, the number of fluorescent lamps 64 used can be changed, or the lighting fixture 5 can be cleaned. Or lighting fixture 5 as described above
The entire lighting fixture 5 can be replaced by removing the locking frame 25 of the above from the wire 42.

After that, the motor 75 is driven by the operation of the switch or the remote controller to rotate the output shaft 76 and the pulley 77 in the counterclockwise direction in FIG. Two
The feed roller 70 is rotated counterclockwise. Along with this, the wire 42 is forcibly fed upward in cooperation with the first feed roller 69, and the constant force spring 68 is wound around the barrel 67 by its restoring elasticity, and the barrel 48 is rotated accordingly. The wire 42 is wound around the body 48 to raise the luminaire 5, and the luminaire 5 can be held in the use state stored in the support frame 3 as in the above-described embodiments, and a pair of electrical contacts on the luminaire 5 side. 21 and 22 are brought into contact with the pair of electrical contacts 34 and 35 on the side of the support frame 3, and the power supply to the electrodes of the fluorescent lamp 64 becomes possible. Then, by operating a switch or the like, power is supplied to the electrodes of the fluorescent lamp 64,
Can be turned on.

According to this embodiment, since the body 48 is constantly urged in the winding direction of the wire 42 by the constant force spring 68, the wire 42 is wound in an orderly manner without being loosened while tension is applied. Can be held at. Also,
The constant load spring 68 may be wound in a length substantially equal to the payout length of the wire 42, so that the constant load spring 68 can be made compact.

As described above, the constant load spring 68 can be used to make it compact, but it is not necessarily limited to the constant load spring 68, and for example, a spiral spring can be used. Further, in the present embodiment, when the wire 42 is unwound or wound up, the first feed roller 69 and the second feed roller 70 sandwich it to provide frictional resistance. If the wire 42 is wound, friction resistance can be imparted when the wire 42 is unwound or wound up. Therefore, the first feed roller 69 is not necessary. Alternatively, two wires 44 may be used and the lifting devices for the wires 42 may be installed at two locations.

As described above, according to the present embodiment, the luminaire 5 is held in the raised state toward the ceiling panel 1 side, and the fluorescent lamp 64 is newly installed, replaced, the luminaire 5 is cleaned, and the luminaire 5 is used. Drive the motor 75 when replacing the whole
The wire 42 can be unwound from the winding cylinder 45 to lower the lighting fixture 5. Therefore, any one of them can easily, quickly, and safely perform such work in a stable state such as on the floor. Further, since the lighting fixture 5 is automatically moved up and down by driving the motor 75, the lifting work of the lighting fixture 5 can be performed quickly and efficiently. Further, the winding cylinder 4 that winds the wire 42 so that the wire 42 can be drawn out.
Since the constant load spring 68 constantly urges the wire 8 in the winding direction of the wire 42, the wire 42 can be held in an orderly wound state without slack in a state where tension is applied to the wire 42.

Next, a second embodiment of the present invention will be described. FIG. 6 is a schematic explanatory view showing a lighting device according to a second embodiment of the present invention, FIG. 7 is a bottom view showing the lighting device, and FIG.
[Fig. 3] is a front view showing the same lighting device, with a part thereof broken away.

A feature of this embodiment is that an incandescent lamp is used as the lighting fixture 5 in place of the fluorescent lamp in the first embodiment, as shown in FIGS.

The support frame 3 is formed so that the peripheral wall is adapted to fit the peripheral wall of the reflector plate (shade) 6 of the lighting fixture 5 and the diameter is gradually reduced from the lower end open side to the upper end. A hole 9 is formed in the central portion of the upper surface plate of the reflection plate 6, and the socket 9 is located inside the hole 9 on the lower surface of the insulating substrate 8.
Is attached, and the base of the incandescent light bulb 11 is screwed into the socket 10. A locking frame 25 is fixed to the center of the upper surface of the lighting fixture 6, and a spherical portion 43 formed at the tip of a wire 42 that is a flexible wire member is removably locked to the locking frame 25. . The rest of the configuration is the same as that of the first embodiment, so the same parts are denoted by the same reference numerals and the description thereof is omitted.

As a flexible linear member for suspending the lighting fixture 5, a power cord can be used instead of the wire 42 in the first and second embodiments. In this case, the power cord whose one end is connected to the lighting fixture 5 is inserted into the hole formed in the upper surface plate of the support frame 3 and wound around the center of the body supported by the cover 44 so that the power cord can be unwound. The metal wire exposed at the end is embedded in a hole formed in the cylinder, and the metal wire is connected to a slip ring attached to the outer circumference of one side of the cylinder. On the other hand, a support is attached to the upper surface of the support frame 3, the base of the brush is attached to the support, and the tip of the brush is brought into contact with the slip ring. In this way, if the power cord connected to the lighting fixture 5 is wound around the body so as to be able to be drawn out and connected to the power source through the slip ring, the brush, etc., as in the first and second embodiments. The electrical contacts 21 and 22 for power supply on the side of the lighting fixture 5 and the electrical contacts 34 and 35 for power supply on the side of the support frame 3 are not necessary. When a power cord is used as the flexible linear material,
It is also possible to connect directly to the power supply via a switch without using a slip ring or a brush. The power cord is preferably reinforced with a material having high strength such as nylon.

A tension spring is interposed between the end of the wire 42, which is a flexible wire, and the luminaire 5, and the resilience of the tension spring when the luminaire 5 is raised causes the tension of the luminaire 5 side. The electrical contacts 21 and 22 for power supply are brought into pressure contact with the electrical contacts 34 and 35 for power supply on the ceiling side so that they can be surely contacted. Further, the lifting device can be provided on the side of the lighting fixture 5.

Further, the pair of electric contacts for power supply on the side of the luminaire 5 and the side of the ceiling 1 are not limited to being provided. Further, if the electric contacts 21, 22 and 34, 35 are made of a leaf spring material and are elastically contacted with each other, they can be surely contacted. Further, when the weight of the entire apparatus is large, it may be supported from the ceiling slab. Further, the constituent elements of each of the above-described embodiments can be appropriately combined and used. In addition, the present invention can be modified in various ways without departing from the basic technical idea thereof.

[0030]

As described above, according to the present invention, by driving the motor of the elevating device, the flexible linear member is automatically paid out to lower the lighting fixture which is raised to the ceiling side. It is possible to automatically wind the flexible wire material by driving the motor of the elevating device, and raise the lighting fixture to the ceiling side to keep it in use. In this way, it is possible to raise the ceiling side and lower the luminaire that is held in use as needed, so you can install a new bulb, replace the bulb, clean the luminaire, and reduce the number of fluorescent lamps used. It is possible to perform work such as changing and replacing the entire lighting fixture in a stable state on the floor. Therefore, anyone can easily, quickly, and safely perform those operations. In addition, the lighting fixture can be automatically moved up and down without the need for manpower. Therefore, the lifting and lowering work of the lighting fixture can be performed quickly and efficiently. Furthermore, since the winding cylinder that winds the flexible linear material so that it can be paid out is constantly urged in the winding direction of the flexible linear material by a spring, tension is applied to the flexible linear material. It can be held in an orderly rolled state without sagging. Therefore, even if the raising and lowering work of the lighting fixture is repeated, the lighting fixture can be raised and lowered smoothly and reliably, and the reliability can be improved.

Further, by using a constant force spring as the spring, the constant force spring can be wound in a length substantially equal to the payout length of the flexible linear member, so that it can be made compact. .

In addition, the flexible linear member is formed of a material such as a wire for exclusive use of suspension other than the power cord, is provided on the lighting fixture side, and is electrically connected to the electrode of the electric bulb for power supply. When the lighting fixture is lifted, the electrical contacts are installed on the ceiling side and are connected to the power supply so that they can be electrically connected to the power supply. Can be made.

Further, by forming at least one of the electric contact for power supply on the side of the luminaire and the electric contact for power supply on the ceiling in a ring shape, the luminaire rotates about a vertical axis when rising. Even if it is, it can be surely electrically connected.

Further, a power cord is used for the flexible linear member, and a slip ring provided on a rotatable winding drum, to which a metal wire of the power cord is connected, and a brush that contacts the slip ring are provided. By configuring the lighting equipment and the power source to be connected via the lighting equipment, it is not necessary to provide an electrical contact for supplying power to the lighting equipment side and the ceiling side, and the lighting equipment is raised to the ceiling side. This simplifies the structure for holding the device in use.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram showing a lighting device according to a first embodiment of the present invention.

FIG. 2 is a bottom view showing the lighting device.

FIG. 3 is a cross-sectional view of the central portion of the lighting device showing a state where the lighting fixture is being lowered.

FIG. 4 is a partially cutaway plan view showing a lifting device of the lighting device.

FIG. 5 is a front view showing the same lighting device, in which a central portion is partially cut away in a usage state in which a lighting fixture is raised.

FIG. 6 is a schematic explanatory view showing a lighting device according to a second embodiment of the present invention.

FIG. 7 is a bottom view showing the lighting device.

FIG. 8 is a front view showing the lighting device, with a part of the central portion cut away.

[Explanation of symbols]

 1 Ceiling Panel 3 Support Frame 5 Lighting Equipment 6 Reflector (Shade) 10 Socket 11 Incandescent Light Bulb 21 Electric Contact for Power Supply 22 Electrical Contact for Power Supply 34 Electrical Contact for Power Supply 35 Electrical Contact for Power Supply 42 Wire (Flexible wire material) 63 Socket 64 Fluorescent lamp 67 Body 68 Constant load spring 69 First feed roller 70 Second feed roller 75 Motor

Claims (5)

(57) [Claims] 1. A luminaire, a flexible linear member for suspending the luminaire, a winding cylinder for winding the flexible linear member so that the flexible linear member can be drawn out, and the winding cylinder for the flexible linear member. , A motor for constantly urging the flexible linear member in the winding direction, a motor for winding and unwinding the flexible linear member, and driving the motor causes the flexible linear member to resist the elasticity of the spring from the winding drum. And has a feed roller for feeding to the winding cylinder so as to wind it by utilizing the elasticity of the spring, and selectively drives the flexible linear member to wind and feed by driving the motor. And an elevating device for elevating the luminaire to the ceiling side to hold it in use or lower it. 2. The lighting device according to claim 1, wherein the spring is a constant force spring. 3. The flexible linear member is made of a material for suspending other than the power cord, is provided on the side of the luminaire, and the electrical contact for power supply electrically connected to the electrode of the light bulb is illuminated. The lighting device according to claim 1 or 2, which is configured to be provided on the ceiling side and electrically connected to an electric contact for power supply which is connected to a power supply when the fixture is raised. 4. An electrical contact for supplying power to the lighting equipment,
The lighting device according to claim 3, wherein at least one of the electric contacts for power supply on the ceiling side is formed in a ring shape. 5. The flexible linear member is a power cord, and a metal wire of the power cord is connected to the flexible cord through a slip ring provided on a rotatable winding drum and a brush that is in contact with the slip ring. The lighting device according to claim 1, wherein the lighting device and the power source are connected together.