JPS6248010A - Ballast contained in case - Google Patents

Abstract

PURPOSE:To continue safe operation without making the assembly process complex, by a method wherein a case is filled with compound so that a part of coil is exposed. CONSTITUTION:A boat-shaped case 61, which has a container section 62 whose one plane is opened to contain a ballast 3, is, for example, formed of one steel plate with stamping. Moreover, the size of the container section of the case 61 is selected to contain at least an exposed section a coil 32 on one side of the ballast 3 and an iron core 31. After the ballast 3 has been contained in the container section 62 of the case 61, the case 61 is filled with compound 4 and the filling amount is adjusted so that a part of the coil 32 in the ballast 3 remains exposed, thereby providing a ballast contained in a case that can be continuously and safely operated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a cased ballast, and more particularly to a cased ballast having an improved structure in terms of safety.

[Background of the invention]

Conventional ballast structures can be roughly divided into two types: encased ballasts, in which the ballast body is housed in a case, and bare type ballasts, in which the ballast body is exposed, but each has the following drawbacks: was there.

In the former case, since the entire ballast body has a sealed structure, (1) decomposition gas of organic matter generated during use will fill the inside and deteriorate the coil coating, etc.

(2) Expansion and contraction of the coil portion due to turning on and off is inhibited and mechanical stress is applied, which damages the coating of the coil and tends to cause a short circuit between the layers of the coil.

(3) If the coil is short-circuited during use, a large amount of decomposition gas will be generated from inside, but it will be difficult to release, so the pressure will be high, and if it erupts explosively, it will combine with oxygen in the air and destroy surrounding combustibles. There is a risk of ignition.

Also, in the latter case, the entire ballast is exposed, so (1) Noise and temperature rise will increase.

(2) Easily affected by humidity and atmospheric gas during use.

There are other difficulties.

Therefore, Japanese Utility Model Publication No. 49-10252 proposes a ballast for discharge lamps in which a tube for discharging gas is embedded in the compound of the case. According to this proposal, the problems of conventional cased ballasts and bare type ballasts can be solved to some extent, but the assembly work becomes complicated because the work of embedding a new tube is added.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, the present invention provides a case-encased ballast with a new structure that does not complicate the assembly process and can solve the problems of conventionally proposed ballasts.

[Wt essential points of invention]

That is, the present invention provides at least a ballast body comprising an iron core and a coil wound around the iron core.

To provide a cased ballast comprising one coil exposed surface of a ballast body, a boat-shaped case having a storage part for storing an iron core part, and a compound filled in the case so that a part of the coil is exposed. It is something.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 and 2. 31 is an iron core combined with an E-type or I-type core, etc., 36 is a bobbin with terminal plates 33 provided at both ends, 32 is a coil wound around a pobbin 66 combined with the iron core 31, and 34 is a terminal arranged on the terminal plate 53. The winding end of the coil 32 and the lead wire 35 are connected to this terminal 54. In the embodiment of the present invention, the following elements are further combined with the stabilizer main body 3 configured as described above. That is,
.

Reference numeral 61 denotes a boat-shaped case having a storage section 62 with one side open for storing the ballast main body 3, and the case 61 is formed, for example, from a single sheet of steel by press working. Further, the storage portion 62 of the case 61 is selected to have a size that can accommodate at least the exposed coil portion on one side of the ballast main body 3 and the iron core portion. 4 is a compound filled in the case 61 after the ballast main body 3 is placed in the storage part 62 of the case 61, and this compound 4 remains with a part of the coil 32 of the ballast main body 3 exposed. ,
This is to adjust the filling amount.

In the embodiment, approximately 3/4 of the height H of the ballast body 3 is used. In other words, the iron core 31 is almost the same as the combination 4.
I'm adjusting the amount of compound to be filled in 5 so that it sinks inside. Further, the depth of the case 61 is selected to be greater than V4 of the height H of the ballast body 3 so that the compound 4 does not flow out.

Note that 64 is a cover for the exposed coil 32 of Compound 4;
Before filling compound 4, assemble it into the ballast body 3 and fill it with compound 4.
It is convenient to embed part of it inside. Cover 6 like this
4 can prevent damage to the exposed coil 36 and improve the heat dissipation effect of the ballast main body 5.

(11) During use, decomposed gas generated from internal organic matter easily escapes from the exposed open surface of the coil 32, so the generated gas does not fill the inside and deteriorate the coil coating, etc. (2) Lighting - Since a portion of the coil 32 is open to the expansion and contraction of the coil portion when the light is turned off, there is a degree of freedom, and there is less mechanical stress on the coil coating and the like.

(3) Even if the coil 32 short-circuits between the eyebrows during use and a large amount of decomposed gas is generated from the organic matter inside, the gas can be released from the open surface of the coil 32 exposed at the stage 15f where the pressure is relatively low. Therefore, high pressure does not build up inside, which prevents explosive gas from blowing out and eliminates the risk of ignition.

(4) Since the core of the transformer body 3, which is the source of noise and temperature rise, is embedded in the compound 4 from almost the top to the bottom, there is almost no difference in performance from a sealed structure, and the The amount used can be reduced and Case 61
Since the opening area is wide, the filling operation of Comparan and 4 becomes easy.

It should be noted that the cased stabilizer 1 constructed in this manner is combined with a base (not shown) and the like, and is assembled directly facing the vessel.

Next, the embodiment shown in FIGS. 3 and 4 will be described. In this embodiment, a quick connection mechanism 7 assembled to a bobbin 56 is used to connect the end of the coil 32 and the lead wire 35. That is, the quick connection mechanism 7 is equipped with a quick connection fitting 71, and one end of this connection fitting 71 is brought into contact with the terminal 34 assembled in the terminal block 33 of the bobbin 36, and the other end is configured to engage with the lead wire 35. It is then assembled onto the end surface of the bobbin 36. Such a quick-setting mechanism 7
Although varnish or compound is originally disliked, according to the embodiment, the top surface of the ballast main body 3 is not immersed in the compound 4, so the coupling mechanism 7 can be installed at any point in the assembly process. It can be assembled easily, making production management very easy.

Next, still another embodiment shown in FIGS. 5 and 6 will be described. This embodiment is an improvement on the cover 64 of the embodiment previously explained with reference to FIGS.
This portion is used as the pace 63. That is, the filling of the compound 4 is performed in the reversed state of FIG. 5, but by extending both ends of the cover 64 as described above beyond the case 61, after filling the compound 4, the state shown in the figure is obtained. , it becomes possible to utilize the stretched portion of the cover 64 as a space 63 for weiring the cased transformer into the appliance. In this case, in this embodiment, in order to facilitate later wiring work, the terminal block 33 of the bobbin 36 is extended further outward than the outer dimension of the iron core 31, and the terminal 34 is
The position of
In the figure, the upper surface of the terminal plate 33) is configured. Of course, in this case, the dimensional relationships at various locations are selected so that the terminals 33 do not sink into the compound 4 during the filling operation.

Furthermore, to add some explanation to the embodiment shown in FIGS. 5 and 6, reference numeral 64 denotes a band that tightens the base 63 to the ballast main body 3;
4' is disposed at a location where the leakage flux is greatest, so it is desirable that it be disposed away from the inner surface of the case 61 or firmly fixed to the inner surface of the case 61.

In the example, the two are separated and compound 4 is applied during this time.
is selecting the structure in which it will be placed. That is, base 6
The dimensional relationships at various locations are selected so that the band 64 does not touch the case 61 even if the band 3 and the case 61 come into contact with each other.

Now, to add some explanation about the manufacturing method of the cased ballast 1 of the embodiment, if the viscosity of the compound 4 is high, first place the opening of the case 61 facing the top surface, and place the compound 4 here. After injecting an appropriate amount, this case 6
The ballast main body 3 can be pushed and embedded into the combination band 4 of 1. In particular, when adopting such a manufacturing method, it is advantageous to devise a structure in which the embedding depth of the ballast main body 3 is regulated as explained in FIGS. M5 and 6.

〔Effect of the invention〕

As explained above, the present invention includes a ballast main body consisting of an iron core and a coil wound around the iron core, a case having a storage portion that stores at least one exposed coil surface of the ballast main body and the iron core portion; The present invention provides a cased ballast that includes a compound filled in the case so that a part of the coil is exposed.According to the present invention, it is possible to obtain a cased ballast that can continue safe operation. It is possible.

[Brief explanation of drawings]

FIG. 1 shows one embodiment of the present invention, and is a cross-sectional view taken along the line B-B in FIG. 2, which will be explained later.
FIG. 3 is a sectional view showing another embodiment, and FIG. 4 shows the configuration of the coupling mechanism used in the embodiment shown in FIG. 3. 5 is a sectional view for explaining another embodiment, and is a sectional view taken along the line DD in FIG. 6, which will be explained later. FIG. It is a sectional view showing a C section. 1... Ballast in case 6... Ballast body 4... Compound 31... Iron core 52... Coil 61... Case 62... Storage section 22 Figure 3 section

Claims (1)

[Claims] A ballast body comprising an iron core and a coil wound around the iron core; at least one coil exposed surface of the ballast body;
A case-encased ballast comprising a case having a storage part for storing an iron core part, and a compound filled in the case so that a part of the coil is exposed.