JPS643127Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention improves the vibration distribution curve on the lighting equipment mounting surface of the ballast in a discharge lamp ballast, and attenuates the vibration propagation from the ballast to the discharge lamp side. This invention relates to a device that enables noise attenuation on the discharge lamp side.

As is well known, the ballast (lighting device) for discharge lamps is
Two electromagnetic components formed by a combination of two leakage transformers, two chiyokes, or one leakage transformer and one chiyoke, and a capacitor component or a semiconductor component as constituent members,
It has a structure in which these three are embedded in a common case through the sealing of an insulating filler, and when installing this type of ballast to a lighting equipment, it is necessary to ensure stability as is known. One surface extending in the longitudinal direction of the instrument case is used as a mounting surface, and both ends of the mounting surface are fastened and fixed to the instrument using, for example, screws or nuts. However, the conventional mounting structure has the following problems.

That is, the one shown in FIG. 1 is one of the most typical examples of the conventional structure, in which one surface of the approximately rectangular case 1 extending in the longitudinal direction is the instrument mounting surface 2, and both ends of this mounting surface 2 are not shown in the figure. It protrudes from both ends of the case as shown in FIG. This is to facilitate the installation work, but in the case 1, two electromagnetic components 4 and 5 made of two leakage transformers are installed in the illustrated example.
and a capacitor part 6 are arranged in series in the order of electromagnetic parts 4, 5 and capacitor part 6 as shown in the figure, and by injecting an insulating filler 7, these three parts are arranged in case 1. They are fixedly held in that position and integrated within the interior. Of course, as the electromagnetic components 4 and 5, in addition to the combination of the leakage transformer described above, a combination of a yoke and a yoke, or a combination of a transformer and a yoke can be used.
It is customary to have a structure in which the capacitor components (sometimes semiconductor components) 6 are arranged in front of the capacitor component 6 on one side of the capacitor component. In this conventional structure, the vibration distribution curve on the instrument mounting surface 2 is such that both longitudinal ends and the center of the case 1 are the maximum points of vibration, as shown in FIG. It has two dots, R and R, and is of the so-called 1x vibration type, with both ends of the case being free ends. In this case, since the medium is non-uniform, the lengths of the sides A and B, and the lengths of the nodes L and L are unequal.

As mentioned earlier, the mounting positions for the discharge lamp (lighting equipment) are set at both ends of the case 1 as shown by the fixture mounting holes 3 and 3 as shown in the figure for ease of installation work. Since the ballast is at the antinode of vibration, when it is installed in a discharge lamp (lighting equipment), the vibration on the ballast side will be greatly propagated to the discharge lamp (lighting equipment) side.
This has the disadvantage of increasing noise on the discharge lamp (lighting equipment) side. In order to reduce the vibration propagation, it is effective to attach the device to the discharge lamp (lighting device) at the nodal position of the vibration on the device mounting surface 2 shown in the figure, but the case 1 must have a sealed structure; Furthermore, since the mounting surface 2 corresponding to the joints RO and RO is located in the middle of the case 1, new difficulties arise in the mounting work.

The present invention was developed to solve these problems, and its features include two electromagnetic parts that are heavy in unit weight and act as vibration sources;
A single lightweight component with a light unit weight, such as a capacitor component or a semiconductor component, is integrated into a common case by enclosing a filler, and a lighting device is installed at both longitudinal ends of the device mounting surface of the case. In the ballast for a discharge lamp, which is provided with a mounting part that is tightened and fixed to the case, the two electromagnetic parts are arranged at both ends in the longitudinal direction of the case, and the lightweight part is arranged in the middle position between the two electromagnetic parts. , the vibration distribution curve of the instrument mounting surface is changed to a vibration distribution curve that reduces the vibration level of the mounting part.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment.The one shown in FIG. 2 uses three components, two electromagnetic components and a capacitor component (semiconductor component) similar to that in FIG. (semiconductor parts)
is housed in the case via a filler, one surface extending in the longitudinal direction of the case 1 is the instrument mounting surface 2, and both ends of the instrument mounting surface 2 protruding from both ends of the case 1 in the longitudinal direction are , instrument mounting holes 3, 3
Mounting portions 13, 13 are provided.

For example, as shown in FIG. 3, the mounting portion 13 is tightened and fixed to the lighting device 14 using screws 11 and nuts 12, and the weight of the ballast is fixed to the two-point contact point. It is divided into two parts and has a shape that hangs from the instrument 14. In addition, as shown in FIG.
Anti-vibration rubbers 15 and 16 may be interposed between the mounting portion 13 and the mounting portion 13. In these cases, the excitation force applied to the instrument 14 is expressed as the product of the stabilizer mass and the vibration acceleration, and the excitation force applied to the instrument 14 is expressed as the product of the ballast mass and the vibration acceleration, and
is propagated to. The entire fixture mounting surface 2 may be in contact with the lighting fixture 14, or only the mounting portions 13, 13 may be in contact with each other via the vibration isolating rubber 15 or the like as shown in FIG.

Two electromagnetic components 4 and 5, such as a leakage transformer and a chiyoke, which are heavy in unit weight and serve as a source of vibration, are placed at both ends of the case 1 in the longitudinal direction as shown in the figure, and placed at an intermediate position between the two electromagnetic components 4 and 5. A capacitor component (semiconductor component) 6 having a light unit weight is arranged, and these three components 4, 5, and 6 are fixedly fixed at that position by injecting a filler 7 into one unit. According to such an arrangement structure of the three members 4, 5, and 6, the vibration distribution curve on the instrument mounting surface 2 is a vibration distribution curve having five antinodes and four nodes between them, as shown in the figure. The change is that it is a triple vibration type instead of the single vibration type in the conventional structure. In this case, since the medium is non-uniform, the vibration antinode
Both the knots and the knots are intervals of unequal length.

In other words, the source of ballast vibration is the built-in electromagnetic components 4, such as the leakage transformer and chiyoke.
5 and the magnetic attraction force exerted on the case 1 by leakage magnetic flux generated from these electromagnetic components 4 and 5.
For example, if the electromagnetic components 4 and 5 in the figure are leakage transformers, the larger coil represents the chain coil (secondary coil), and the smaller one represents the transformer coil (primary coil). The chiyoke coil, which is a larger coil, forms an antinode of vibration.
This also applies to the case where the electromagnetic components 4 and 5 are joints. Furthermore, as a vibration distribution form of a non-uniform medium, the vibration level will naturally be higher in parts with lighter mass.

By converting to the triple vibration type as described above, the vibration level of the mounting portions 13, 13 having the instrument mounting holes 3, 3 is reduced. The reason for this is that as shown in Figure 5, the beam 19
If the force P applied to is constant, the displacement x of the beam 19
is proportional to the cube of the length of the beam 19, so the higher the vibration form, the shorter the length of the beam, and the smaller the displacement, the lower the vibration level. be. Therefore, the mounting part 13,
The vibration levels of No. 13 are approximately 10 dB lower than those of Fig. 1, and the attenuation of such vibrations is
It has been confirmed that the noise level when mounting discharge lamps (lighting equipment) is reduced by about 5 phon, and the effect is remarkable.Moreover, the installation work is extremely easy since it is done at both ends of the fixture mounting surface 2. .

As described above, in a common case, the present invention places light parts such as capacitors and semiconductor parts with light unit weight in the center of the case instead of placing them at the ends of the case, and electromagnetic parts with heavy unit weight are placed at both ends of the case. Since the lightweight parts and electromagnetic parts are installed in the same case, the vibration state of the case can be changed and the vibration level of the mounting parts at both ends of the case can be significantly reduced. Unlike a case in which the case is constructed separately, the cases do not vibrate each other and generate large noise, and the vibration level described above can be effectively reduced. Therefore, the problem of vibration in conventional similar ballasts can be reliably solved,
Moreover, the necessary structure is simple and easy to implement, and it is excellent in contributing to noise reduction in discharge lamps (lighting equipment) using ballasts (lighting devices).

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view of a conventional discharge lamp ballast along with a vibration graph of the fixture mounting surface, Fig. 2 is a longitudinal sectional front view of an embodiment of the present invention, and Figs.
Each figure is a front view showing the specific attachment relationship between the lighting equipment and the ballast, and FIG. 5 is a diagram for explaining the function. DESCRIPTION OF SYMBOLS 1... Case, 2... Instrument mounting surface, 3... Instrument mounting hole, 4, 5... Electromagnetic component, 6... Capacitor or semiconductor component, 7... Filler, 8... Load weight.

Claims (1)

[Scope of claim for utility model registration] Two electromagnetic components that are heavy in unit weight and serve as vibration sources, and one lightweight component that is light in unit weight, such as a capacitor component or a semiconductor component, are packed in a common case. integrated into one body through the encapsulation of the agent,
In the ballast for a discharge lamp, the two electromagnetic components are arranged at both longitudinal ends of the case, and the two electromagnetic components are arranged at both longitudinal ends of the case, and the two electromagnetic components are arranged at both longitudinal ends of the case. A ballast for a discharge lamp, characterized in that by arranging a lightweight component at an intermediate position between electromagnetic components, the vibration distribution curve of the fixture mounting surface is changed to a vibration distribution curve that reduces the vibration level of the mounting portion.