JPS6127057Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lighting fixture, particularly a hanging type fluorescent lamp fixture for multiple lights that is used by hanging from a ceiling surface.

Recently, as shown in Fig. 1, this type of lighting equipment has a ballast 4, a switch 5, and a light bulb, which are completed as solid objects at the bottom of a top plate 3, which is fixed to the lower end of a cord 1 via a tip-shaped cylindrical body 2. There is a device in which electrical components such as a socket 6 are mounted, an electrical component case 7 that covers and stores these electrical components is fixed, and a lamp body 8 is engaged and held on the upper periphery of the top plate 3. It had the following drawbacks.

(1) Since a plurality of individually completed ballasts 4 are housed in the electrical equipment case 7, the heat generated from these ballasts 4 interacts as radiant heat,
They have a negative thermal effect on each other.

(2) The only part where the heat generated from the ballast 4 is radiated directly through the solid body is the part where it is attached to the top plate 3, which has poor heat dissipation.To improve this, significant ventilation holes were installed in the top plate 3 and the electrical case 7. It is visually appealing.

(3) Since the stabilizer 4 is arranged on a flat surface, it is difficult to balance the device, and an improvement cylinder 2 is required to raise the fulcrum.

This idea was made to improve the above-mentioned drawbacks, and in addition to storing the ballast element inside the case body, a bottom plate with a light body engaging part formed on the periphery is provided at the lower end of the ballast filled with compound. The lamp body is engaged and held in the lamp body engagement part of this bottom plate, and an electrical equipment case is provided on the underside of the bottom plate to cover and store electrical components such as switches and miniature bulb sockets, thereby ensuring good heat dissipation from the ballast. It is an object of the present invention to provide a lighting fixture which can be neatly arranged in the center and has a good balance.

An embodiment of this invention will be described below with reference to FIGS. 2 and 3.

Reference numeral 4 denotes a stabilizer, and this stabilizer 4 includes a case body 9 made of an aluminum extrusion molded product or a metal tube, etc., which is open at both ends, and a plurality of body parts housed in the case body 9 so that their centers of gravity coincide with each other in the vertical direction on the central axis of the case body 9. ballast element 41, a compound 13 of a good thermal conductor mainly made of polyester resin, for example, which is filled in the case body 9 housing the ballast element 41, and a compound 13 that closes the upper end of the case body 9 and fills the case body 9 housing the ballast element 41, and and an upper lid 15 in which a cord insertion hole 14 is formed. 12 closes the lower end of the case body 9;
The peripheral edge extending outward from the diameter of the case body 9 is bent into an L-shape to form a disk shape, and further extends outward from the peripheral edge in a cross-sectional shape in four directions, and a screw hole 10 is provided in the upper surface. The bottom plate 16 which forms the light body engaging portion 11 is a substantially square-shaped mounting bracket for mounting the light bulb socket 6 into which the switch 5 and the light bulb 17 are mounted.
For example, it is fixed to the lower center of the board with a screw or the like. Reference numeral 7 denotes an electrical equipment case that covers the switch 5, miniature bulb 17, and miniature bulb socket 6, and whose upper opening has the same shape as the bottom plate 12 and extends downward to close the lower part. It is fixed in place. Reference numeral 18 indicates a bulb cover attached to the lower part of the electrical equipment case 7, and reference numeral 8 indicates a lamp body, which is shaped like a deep dish with an open bottom and has a side wall partially extending outward in cross-section and has a mounting hole 19 at its end. It consists of a lamp case 21 having an arm part 20 provided therein, and a lower cover 22 that is engaged and held at the lower part of the lamp case 21, and the bottom plate 1
It is engaged and connected to the bottom plate 12 by the lamp body engaging portion 11 and the arm portion 20 of No. 2, and is fixed by the lamp body mounting screw 23 through the mounting hole 19 and the screw hole 10. A lamp 24 is held at one end by a lamp holder 25 fixed in the lamp case 21, and is connected to the lamp socket 26 by electrical parts such as the switch 15 and the bulb 17, and the ballast 4. Connected to normal lighting circuit. Note that 27 is a top cover mounting screw, and 28 is a bottom plate mounting screw.

The following effects can be expected from the lighting fixture having the above configuration.

(b) The ballast element, which is not completed as an individual ballast, is housed inside the case that serves as the outer box of the ballast, and the extra space is filled with a compound with excellent thermal conductivity, so the ballast The heat generated by the element is efficiently transferred to the case body through the compound, resulting in extremely high heat dissipation effects.

(b) Since the ballast itself is used to protrude outside as a design element, there is no need for heat radiation holes, and the ballast can be grouped together for design purposes.

(c) Since multiple ballast elements are housed vertically inside the case, the fulcrum of the lighting fixture is raised, and the weight balance of the fixture is extremely good. Therefore, there is no need for a cylindrical body to raise the fulcrum.

In the above embodiments, a cord-suspended appliance was described, but even if a chain or the like is used as a hanging device, the same effects as in the embodiments can be obtained. Furthermore, the shape of the lamp body or the shape of the electrical equipment case is not limited to those of the above embodiments.

Since this idea was constructed as explained above,
To provide a lighting device that has good heat dissipation from a ballast, has a neat design, and has a good weight balance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional example, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 3 is an exploded perspective view. In the figure, 4 is a ballast, 7 is an electrical case, 8 is a lamp body, 9 is a case body, 11 is a lamp engagement part, 12 is a bottom plate, and 41 is a ballast element. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A ballast in which a plurality of ballast elements are vertically stacked and housed inside a case body and filled with a compound; a bottom plate fixed to the lower end of the ballast and having a plurality of light body engaging portions formed on its periphery; A lighting fixture that includes an electrical equipment case that houses a lamp that is engaged and attached to each of the lamp engagement portions of the bottom plate, and electrical equipment such as a switch and a miniature bulb socket that are attached to the lower surface of the bottom plate.