JP2519506Y2 - High voltage penetration type porcelain capacitor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a high-voltage feedthrough porcelain capacitor.

[Prior Art] High-voltage penetrating porcelain capacitors are used as filter capacitors for magnetron tubes of microwave ovens.

Here, an example of the conventional high-voltage through-type porcelain capacitor will be described with reference to the assembled longitudinal sectional view of FIG. 6. The high-voltage through-type porcelain capacitor has through holes 1 and 2, front electrodes 3 and 4, and a back electrode 5. ground plate having a ceramic dielectric body 6, a window ₇₁ having (chassis)
7, electrode fittings 8 and 9, center conductors 12 and 13 with connection tabs 10 and 11, silicone tubes 14 and 15, insulating case 16 and insulating cover 17, and the silicone tubes 14 and 1
5 is inserted and adhered to the central conductors 12 and 13, the insulating case 16 is inserted and fitted on the outer peripheral side of the ground plate 7, and the insulating cover 17 is inserted and fitted on the inner peripheral side. It was constructed by solidifying by 19.

[Problems to be solved by the device]

However, in manufacturing such a conventional capacitor, an insulating cover 17 on the inner peripheral side of the ground plate 7 is inserted and fitted by an automatic assembling machine. In that case, insulation cover
Since 17 is flexible, it may be bent and inserted into the ground plate 7 and may be inserted and fitted with insufficient centering. Therefore, the creepage distance and insulation distance under the electricity collection method are insufficient. In addition, there is a problem in that the quality of the capacitor is significantly impaired when the insulating resin is cast, and the resin leaks from the gap formed in the fitting portion between the ground plate 7 and the insulating cover 17.

The capacitor of the present invention has an engaging projection (rib) which functions as a stopper at the time of insertion and fitting on the outer peripheral surface of the insulating cover.
Is provided so that the grounding plate and the insulating case can be accurately and easily centered to solve the above problem.

[Means for solving the problem]

According to the present invention, a central conductor with a tab is inserted into a through hole of a porcelain dielectric through a silicone tube, an electrode fitting that comes into contact with the central conductor is attached to the front electrode of the porcelain dielectric, and a ground plate is attached to the back electrode. Contacting each other, inserting and fitting an insulating cover on the inner peripheral side of the grounding plate, and forming an engaging protrusion on the outer peripheral surface of the insulating cover in a through-type porcelain capacitor integrally solidified by insulating resin molding. Then, the high-voltage through-type porcelain capacitor is characterized in that the protrusion is brought into contact with the lower surface of the ground plate.

[Action]

If the insulating cover is inserted into the ground plate by an automatic assembly machine until its protrusions come into contact with the bottom plate bottom surface of the ground plate,
The insulating cover is easily fitted with its center line aligned with the center line of the ground plate.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. The overall structure of this capacitor is as shown in FIGS. 1 to 3 and is substantially the same as the conventional example described above. As shown in FIG. of a obtained by the engaging projections on the outer circumferential surface and an annular projection 17 _1, the structure of the other portions do not have a place to change from the conventional example of FIG. 6.

That is, the front electrodes 3 and 4 are arranged on one surface of the porcelain dielectric 6 having the two through holes 1 and 2, and the back electrode 5 is arranged on the opposite surface opposite to the front electrodes 3 and 4, A hole is provided corresponding to the through holes 1 and 2, and the back electrode 5 is connected to a ground plate 7 having a window 7 ₁ opened at the center so as to be conductive, and center conductors 12 and 13 with ground tabs 10 and 11 are provided. Is connected to the front electrodes 3 and 4
Through the front electrodes 3 and 4, the porcelain dielectric 6, the back electrode 5 and the window 7 ₁ of the ground plate 7 in this order, and insert silicone tubes 14 and 15 into the central conductors 12 and 13 for insulation and withstand voltage. A cylindrical insulating case 16 is attached on the outer peripheral side of the ground plate 7.
The insulating cover 17 is inserted and fitted on the inner peripheral side thereof, and the protrusion 17 ₁ thereof is brought into contact with the lower surface of the bottom plate 7 ₂ of the ground plate 7, and the inside of the insulating case 16 and the insulating cover 17 is covered with epoxy. Insulating resin molds 18 and 19 made of resin or the like are respectively injected and solidified.

The insulating cover 17 of FIG. 4 is an embodiment in which a rounded shape is formed below the annular protrusion 17 _{1. In} FIG. 5, an annular step portion 17 ₂ is provided on the outer surface of the insulating cover, and this is used as an engaging protrusion portion. It is a thing. A plurality of engaging protrusions may be intermittently formed on the outer peripheral surface of the insulating cover at substantially equal intervals.

[Effect of device]

In the capacitor of the present invention, the engaging projection is provided on the outer peripheral surface of the insulating cover, so that when the capacitor is applied to the automatic assembly machine, the fitting operation is accurately and easily performed, and a large quantity of good quality capacitors can be produced, and the capacitors can be provided at low cost. It is a thing.

[Brief description of drawings]

1 to 3 relate to an embodiment of the present invention. FIG. 1 is a front sectional view, FIG. 2 is a side sectional view, FIG. 3 is an exploded explanatory view, and FIG. 4 is another embodiment. FIG. 5 is a front sectional view of an insulating case in an example, FIG. 5 is a front sectional view of an insulating case in yet another embodiment, and FIG. 6 is a front sectional view of a conventional example. 1,2 …… Through hole, 3,4 …… Front electrode, 5 …… Back electrode, 6 ……
Porcelain dielectric, 7 ... Ground plate, 7 ₁ ... Window, 8, 9 ... Electrode metal fitting, 10, 11 ... Ground tab, 12, 13 ... Center conductor, 14, 15 ...
… Silicone tube, 16… Insulation case, 17… Insulation cover, 17 ₁ … Protrusion, 17 ₂ … Step, 18, 19… Insulation resin mold.

Claims (1)

(57) [Scope of utility model registration request] 1. A center conductor with a tab is inserted into a through hole of a porcelain dielectric through a silicone tube, and an electrode fitting for contacting the center conductor is connected to a front electrode of the porcelain dielectric and a back electrode is connected to the front electrode. In a through-type porcelain capacitor in which the ground plates are brought into contact with each other, an insulating cover is inserted and fitted on the inner peripheral side of the ground plate, and the whole is integrally solidified with an insulating resin mold, an engaging protrusion is provided on the outer peripheral surface of the insulating cover. A high-voltage through-type porcelain capacitor, which is formed so that the protrusion is brought into contact with the lower surface of the ground plate.