JPS6026404Y2 - Lighting equipment for discharge lamps - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lighting fixture for a discharge lamp, and particularly to a mounting structure for a reflector.

Generally, lighting equipment that lights a discharge light such as a fluorescent lamp usually has a built-in ballast.

Therefore, when the ballast is in operation, the ballast core is vibrated by the alternating magnetic flux, causing the ballast itself to vibrate, and this vibration causes the lighting fixture to vibrate and generates lighting fixture noise.

Therefore, as a countermeasure against this problem, when attaching the stabilizer 4 to the device main body 1, as shown in FIG. ing.

However, in this case, a large space is formed between the stabilizer 4 and the device body 1 due to the rubber backing 7.

As a result, the heat dissipation of the ballast 4 is significantly impaired, and a heat dissipation plate 8 made of a metal material such as aluminum, which has good thermal conductivity and bent into a corrugated shape, needs to be interposed and tightly attached to the space. Since the heat sink 8 becomes a medium for vibration transmission, the noise reduction effect is not necessarily satisfactory.

Further, there were problems in that the number of parts such as the rubber backing 7 and the heat sink 8 increased, and the number of man-hours for assembling these parts also increased.

On the other hand, according to the creator's various studies on noise, conventional noise countermeasures that prevent the noise from the ballast 4 from being transmitted to the device body 1 cannot be transmitted to the device body 1 unless the vibration transmission is completely reduced to zero. It has been found that the generated vibration energy vibrates the reflector plate 3 that is in close contact with the instrument body 1, and that the vibration of the reflector plate 3 is a major cause of noise.

Therefore, the purpose of this invention is to provide a luminaire for discharge lamps that suppresses the vibration generation of the reflector and reduces noise without increasing the number of parts and assembly man-hours as in the past. be.

This idea involves loosely fitting the thumbscrew that attaches the reflector to the reflector mounting bracket, which is attached to the device body, into a threaded portion that threads into the screw hole of the device body, with a diameter larger than this threaded portion. A body part, and a head part formed to have a larger diameter than the body part, and which is placed and suspended at a certain distance from the main body of the instrument after the screw part is screwed onto the reflector mounting bracket. It is characterized by having been configured.

An embodiment of this invention will be explained below based on FIG. 1.
is a gutter-shaped device body with one side open, and a ballast 4 is directly fixed inside with ballast mounting screws 5. Although not particularly shown, lamps are attached to both ends of this device body 1. A lamp socket is installed.

Reference numeral 2 denotes a reflector mounting bracket in which the tips of U-shaped portions 2a formed at both ends are inserted into mounting holes 1a formed on both sides of the instrument body 1, and a screw hole 2b is bored in the center. are doing.

Reference numeral 3 denotes a reflector plate in which a through hole 3a having a diameter larger than that of the screw hole is bored in correspondence with the screw hole 2b of the reflector mounting bracket 2; It is a thumbscrew attached to the instrument body 1, and has a threaded portion 61 on one end that is screwed into the threaded hole 2b of the reflector mounting bracket 2;
The threaded portion 61 is formed continuously with this threaded portion 61.
The head 63 is connected to the body 62 and has a diameter larger than the diameter of the body 62 and the through hole 3a.

Then, if this thumbscrew 6 is inserted into the through hole 3a from the lower surface side of the reflector plate 3, and then the threaded portion 61 is screwed into the screw hole 2b of the reflector mounting bracket 2, the body portion 62 will tighten the thumbscrew. Since it is prevented from tightening beyond a certain level of 6,
The reflector 3 loosely fitted into the body 62 is suspended so as to be placed on the head 63 while being separated from the reflector mounting bracket 2 .

In the discharge lamp luminaire configured in this manner, the body 62 of the thumbscrew 6 acts as a stopper, so the reflector 3 remains suspended from the thumbscrew 6 regardless of whether the thumbscrew 6 is tightened. and is located apart from the instrument body 1.

Therefore, the vibration energy generated by the stabilizer 4 is transmitted to the instrument body 1, but the vibration energy generated by the stabilizer 4 is transmitted to the reflector mounting bracket 2 and the reflector 3.
Since they are not in direct contact with each other, the transmission of vibration energy from the instrument body 1 to the reflector plate 3 is extremely reduced, resulting in lower noise.

In addition, since the reflector mounting bracket 2 is a relatively weak coupling means compared to screw tightening or welding means, a part of the vibration energy is absorbed by the coupling part, and the reflector 3
This serves to reduce the vibration energy transmitted to the reflection plate 3, thereby further reducing the vibration of the reflection plate 3.

In the inventor's experiments, the thickness of the device body 1 and the reflector plate 3 was 0.5 m.
A steel plate with a thickness of 1.0 m is used, and a plate thickness of 1.0 m is used for the reflector mounting bracket 2.
The proposed lighting fixture, which uses a 77F steel plate and has a series sequential start type ballast for two 40W rapid-start fluorescent lamps attached directly to the fixture body, is different from the conventional one shown in Figure 1. After comparing the noise values, there are 6 lighting fixtures that are suitable for this proposal.
It was confirmed that this method has an effect of reducing horn noise.

As described above, according to the present invention, the structure of the thumbscrew has been changed and the reflector and the main body of the device have been separated from each other. This makes it possible to reduce noise over a wide area, and its practical effects are significant.

In addition, since the reflector is suspended with thumbscrews, no tightening force is applied to the reflector to tighten the thumbscrews.
Therefore, it is possible to suppress the deformation of the reflector, and there is also the advantage that it is possible to prevent the illumination fixture from becoming unsightly due to the deformation of the reflector.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional lighting fixture for a discharge lamp, and FIG. 2 is a sectional view showing an embodiment of the lighting fixture for a discharge lamp according to the present invention. In the figure, 1 is the instrument body, 1b is a screw hole, 2 is a reflector mounting bracket, 3 is a reflector, 4 is a stabilizer, 6 is a thumbscrew, 61 is a threaded part, 62 is a body, 65 is a head, Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A device body with a stabilizer attached and mounting holes on both sides, a reflector mounting bracket with both ends attached to the mounting holes of the device body and a screw hole drilled in the center, and a reflector mounting bracket with a screw hole in the center. a thumbscrew screwed into the screw hole; a reflection plate attached to the reflection plate mounting bracket by the thumbscrew;
The above-mentioned thumbscrew has a threaded part whose one end is threaded into the threaded hole of the reflector mounting bracket, a body part which is continuous with this threaded part and has a diameter larger than the diameter of the threaded part, and a body part which is continuous with this body part. The other end has a head having a diameter larger than the diameter of the body, and the body loosely fits the reflector, and the body reflects the threaded portion into the screw hole of the reflector mounting bracket. 1. A lighting fixture for a discharge lamp, characterized in that when the reflector is tightened until it contacts a plate mounting bracket, the reflector is suspended by the head part in a state separated from the fixture body.