JP2587611Y2 - Hanging light fixtures - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fixture body in which a printed wiring board equipped with a two-light high-frequency lighting circuit including two lighting choke coils and two noise prevention choke coils is built in the fixture body. The present invention relates to a hanging type lighting apparatus equipped with two ring-shaped discharge lamps.

[0002]

2. Description of the Related Art FIG. 2 is a cross-sectional view of a conventional hanging type lighting apparatus of this type, FIG. 3 is a cross-sectional view of the apparatus body of the hanging type lighting apparatus, and FIG. FIG. In this hanging type lighting device, a lighting device main body 3 is hung by an electric wire 2 lowered from a ceiling 1. Instrument body 3
Is equipped with a shade 4. The appliance body 3 includes a substantially flat base portion 5 and a dome portion 6 that covers the base portion 5. A high frequency lighting circuit for two lights is mounted in a space surrounded by the base portion 5 and the dome portion 6. Printed wiring board 7 is stored. The printed wiring board 7 has a base 5
It is screwed to.

A lamp socket 8 for two lamps and a lamp support spring 9 for two lamps are fixed to the outer surface of the dome portion 6.
The ring-shaped fluorescent lamps (ring-shaped discharge lamps) 10 and 11 are mounted. A substantially square printed circuit board 7 on which a high frequency lighting circuit for two lights is mounted has two lighting choke coils 12, 13 and two noise preventing choke coils 14, 15, and also has a lighting switch 16. The string 17 is hung from the lighting switch 16. In addition, a balancer 18 is attached to the inside of the instrument main body 3 in order to balance the suspension.

The two lighting choke coils 12 and 13 and the two noise preventing choke coils 14 and 15 mounted on the printed wiring board 7 are arranged in the position and the coil axial direction (indicated by arrows A _{1 to} A ₄₎ . (Shown) are arranged arbitrarily so as to facilitate the design of the wiring pattern on the printed wiring board 7 irrespective of the _two lines B ₁ and B ₂ passing through the central axis of the instrument body 3 and orthogonal to each other.

[0005]

In the above-mentioned conventional hanging type luminaire, two lighting choke coils 12, 1 are provided.
The positions of the three and two noise-preventing choke coils 14 and 15 are determined so that the printed wiring board 7 can easily perform circuit design. For this reason, it is necessary to attach the balancer 18 to the inside of the instrument body 3 in order to balance the suspension.

Further, the mounting directions of the two lighting choke coils 12, 13 and the two noise preventing choke coils 14, 15 on the printed wiring board 7, that is, the coil axial directions are not uniform. For example, as shown in FIG. 4, when the noise prevention choke coils 14 and 15 are arranged in a state where the coil axes are orthogonal to each other, the amount of interlinkage of mutual leakage magnetic flux of the noise prevention choke coils 14 and 15 increases. It causes noise. Also, when the lighting choke coils 12 and 13 are arranged in a state where the coil axes are orthogonal to each other, the ring-shaped fluorescent lamps 10 and 11 are lighted in an appropriate state, for example, the electric characteristics at the time of lighting are similarly changed by the influence of leakage magnetic flux. It may not be possible to do so.

Therefore, an object of the present invention is to eliminate the need for a balancer for balancing the weight during suspension, and to reduce the amount of interlinkage of the leakage magnetic flux of the two noise preventing choke coils to suppress noise. In addition, the amount of leakage flux linkage between the two lighting choke coils is reduced to suppress changes in electrical characteristics of the lighting choke coils during lighting, thereby enabling the two ring-shaped discharge lamps to light properly. An object of the present invention is to provide a down-type lighting device.

[0008]

The hanging lighting fixture of the present invention comprises a printed wiring board mounted with a high frequency lighting circuit for two lights including two lighting choke coils and two noise preventing choke coils. It is built into the appliance body, and two ring-shaped discharge lamps are mounted on the appliance body. The two lighting choke coils and the two noise preventing choke coils balance the weight of four areas defined on the printed wiring board by two orthogonal lines passing through the central axis of the device main body and orthogonal to each other. Can be, for example, in a substantially line-symmetric position,
Each coil axis is arranged in parallel.

[0009]

According to the structure of the present invention, two lighting choke coils and two noise preventing choke coils, which are heavy parts, are provided on a printed wiring board by two orthogonally passing through the central axis of the appliance body. Are arranged at positions where the weights of the four areas defined by the lines can be balanced, so that the weight distribution in the instrument body by the two lighting choke coils and the two noise preventing choke coils is substantially uniform. When a central part of the instrument body is hung from the ceiling, a balancer for balancing the weight is not required.

Further, since the two lighting choke coils and the two noise preventing choke coils are arranged with their respective coil axes parallel to each other, the leakage magnetic flux of the two noise preventing choke coils is arranged. And the amount of interlinkage of the leakage flux of the two lighting choke coils is reduced, thereby suppressing the change in the electrical characteristics of the lighting choke coil during lighting. The ring-shaped discharge lamp lights up in an appropriate state.

[0011]

An embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the hanging lighting apparatus includes a high frequency lighting circuit for two lamps including two lighting choke coils 12, 13 and two noise preventing choke coils 14, 15, which are heavy parts. The mounted printed wiring board 7 is built in the appliance body 3, but the arrangement is different from that of the conventional example and is as follows. That is, the two lighting choke coils 12 and 13 and the two noise preventing choke coils 14 and 15 are formed on the printed wiring board 7 by two lines B ₁ , which pass through the central axis of the appliance body 3 and are orthogonal to _{each other} . B ₂
In a substantially line symmetrical positions of the four regions D ₁ to D ₄ which is defined, in parallel each coil axes state, that arrows C ₁ ~
They are arranged in a state of being aligned in the direction of C _4. The configuration other than the above is the same as that of the conventional example, and the description is omitted.

The two lighting choke coils 12,
13 and 2 choke coils 14, 15 for noise prevention
Has no significant weight difference. If there is a large weight difference between the two, it is necessary to change the position so that the two can be balanced accordingly.
Thus, the two lighting choke coils 12 and 13 and the two noise preventing choke coils 1 which are heavy parts
The 4, 15, substantially line symmetrical positions of the four regions D ₁ to D ₄ which is defined by two lines B _1, B ₂ to through and perpendicular to the central axis of the instrument main body 3 on the printed circuit board 7 , Two lighting choke coils 12, 13 and 2
The weight distribution in the instrument body 3 by the noise preventing choke coils 14 and 15 can be made substantially uniform, and a balancer for balancing the weight when the center of the instrument body 3 is hung from the ceiling. Can be eliminated.

Also, two lighting choke coils 12,
13 and 2 choke coils 14, 15 for noise prevention
Are arranged in a state where their coil axes are parallel to each other, so that the amount of interlinkage of leakage magnetic flux of the two noise preventing choke coils 14 and 15 is reduced to suppress noise.
The amount of leakage flux linkage of the lighting choke coils 12 and 13 is reduced to suppress changes in electrical characteristics of the lighting choke coils 12 and 13 at the time of lighting, and two ring-shaped discharge lamps (not shown) are used. The lighting can be performed in an appropriate state.

Further, since the two lighting choke coils 12, 13 and the two noise preventing choke coils 14, 15 which are heavy parts are dispersedly arranged on the printed wiring board 7, the printed wiring is provided when the packaged product is dropped. The stress applied to the board 7 can be equalized, and the printed wiring board 7
Cracks can be prevented. Further, a balancer is not required, and the cost is reduced.

[0015]

According to the hanging lighting device of the present invention, the weight distribution in the device main body by the two lighting choke coils and the two noise preventing choke coils can be made substantially uniform, and the device main body can be obtained. When suspending the center of the device from the ceiling, a balancer for balancing the weight can be dispensed with.

Further, the amount of interlinkage of the leakage magnetic flux of the two noise preventing choke coils is reduced to suppress noise.
It is possible to reduce the amount of interlinkage of the leakage magnetic flux of each lighting choke coil and suppress a change in the electrical characteristics of the lighting choke coil during lighting, thereby lighting the two annular discharge lamps in an appropriate state.

[Brief description of the drawings]

FIG. 1 is a plan view of a base portion of a fixture main body of a hanging type lighting fixture according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional hanging-type lighting fixture.

FIG. 3 is a cross-sectional view of a fixture main body of a conventional hanging-type lighting fixture.

FIG. 4 is a plan view of a base portion of a fixture main body of a conventional hanging-type lighting fixture.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceiling 2 Electric wire 3 Appliance main body 4 Seed 5 Base part 6 Dome part 7 Printed wiring board 8 Lamp socket 9 Lamp support spring 10, 11 Ring-shaped fluorescent lamp 12, 13 Lighting choke coil 14, 15 Noise preventing choke coil

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F21V 23/00 390 F21V 23/02

Claims (1)

(57) [Scope of request for utility model registration] 1. A printed wiring board on which a high frequency lighting circuit for two lights including two choke coils for lighting and two choke coils for noise prevention is mounted in an apparatus main body, and two ring-shaped parts are mounted on the apparatus main body. In a hanging type lighting device equipped with a discharge lamp, the two lighting choke coils and the two noise preventing choke coils are arranged on the printed wiring board at right angles through a central axis of the device main body. The two lighting choke coils and the two noise preventing choke coils are arranged at positions where the weights of the four regions defined by the lines can be balanced in a state where the respective coil axes are parallel to each other. A hanging light fixture characterized by the following.