CN202084434U

CN202084434U - Fully-sealed structure of capacitor

Info

Publication number: CN202084434U
Application number: CN2011202219284U
Authority: CN
Inventors: 肖体鹏
Original assignee: Chengdu Hongming Electronics Co Ltd
Current assignee: Chengdu Hongming Electronics Co Ltd
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2011-12-21
Anticipated expiration: 2021-06-28

Abstract

The utility model discloses a fully-sealed structure of a capacitor. The fully-sealed structure of a capacitor comprises a housing and a fuse set arranged therein. The fuse set comprises a fuse and electrode leads on tow ends of the fuse. The head of the fuse is fixed by a resin perfusion layer. Positioning stands are disposed on inner walls of two ends of the housing. Each positioning stand is provided with insulators. Few auxiliary parts are adopted by the fully-sealed structure of a capacitor, thereby simplifying the technical operation and reducing the incidence rate of using fault for a product. The positioning stands on two ends of the housing help to prevent the insulators from displacement during the welding so as to avoid cold welding. Resin perfusion is carried out for the head of the fuse set in advance to fix and protect the welding portion, thereby preventing the leads from falling, and enhancing repeated anti-bending and anti-outside-force impacting capabilities of the leads. Meanwhile, the insulation intensity is improved, and adverse influences of welding heat upon the head of the fuse set are minimized.

Description

A kind of capacitor all-sealed structure

Technical field

The utility model relates to the high dry type small size fully-sealed electric container of a kind of application reliability, relates in particular to a kind of capacitor all-sealed structure and relevant assembly technology.

Background technology

In the existing hermetically sealed technology of dry type small size, when the design all-sealed structure, the general fuse that adopts metal tube or metal-back erection welding lead-in wire, insulate with thin-film material, fill assembling with quartz sand or other materials, isolated insulation is come with round insulation sheet or insulated ring in two ends at filler, play the effect of the welding position of adjusting insulator simultaneously, it is simple that such structure appears, reality can bring a lot of difficulties for follow-up erection welding technology, can't determine that at first the core group fills in behind the shell optimum position in the enclosure, the solder side that has influence on the shell two ends varies in size, cause fuse to be heated uneven and the insulator position crooked, the 2nd, welding insulation is during with shell, the heat effect meeting allows and becomes very soft as the packing material that insulate, insulator the welding and scolding tin in solidification process, be in easily along enclosure axis to being removable state, it is a kind of nickeliferous 29% that insulator can cut down quoit, the Bohemian glass iron-based sealing alloy of cobalt 17%.This alloy all has the coefficient of linear expansion close with Bohemian glass in normal temperature to 450 ℃ scope; with the adjacent effective sealing-in coupling of glass insulation physical efficiency; but in welding process, be shifted; the oxide-film that makes the quoit surface part that comes off has been lost solder flux protection and regenerated multiple oxide-film; stoped molten tin to contact with the tight of quoit; so just form rosin joint easily; sealing property and impact resisting vibrating performance all can stay hidden danger; the 3rd, can't determine the tightness of core group and metal shell; make the content and the degree of tightness of filler just right, in practical operation, be difficult to guarantee.

Summary of the invention

The purpose of this utility model just provides a kind of capacitor all-sealed structure and new technology, really simplifies and optimize assembly technology, solves the problem that above-mentioned prior art exists effectively.

The technical solution adopted in the utility model is: a kind of capacitor all-sealed structure, comprise shell and inner fuse thereof, described core group comprises the contact conductor at fuse and fuse two ends, described fuse termination is fixed by the resin dosing equipment layer, the inwall at described shell two ends is provided with positioning table, is equipped with insulator on the described positioning table.

Further, described insulator comprises the cut down quoit with step in the glass insulator and the outside thereof.

Further, described shell is hermetically sealed metal shell.

Further, described fuse outer wall is coated with the heatproof adhesive tape.

The beneficial effects of the utility model are: few auxiliary component is simplified technological operation, reduced the incidence of product operational failure, wherein step and the glass insulator sintering in the cut down quoit of insulator can increase moist extension path, improves sealing effectiveness; The horn shape that turns up is processed in the fairlead outer end of insulator, can increase the contact-making surface with glass insulator, and can be convenient to scolding tin again and enter fairlead inside, thus can significantly improve sealing effectiveness and weld strength, thus soldering reliability improved; The position of core group in shell, insulator positioning table location at metal-back two ends can prevent that insulator is shifted, and avoids forming rosin joint in welding and scolding tin solidification process; Core group termination is carried out resin dosing equipment in advance, plays electric insulation and intercepts the radiation effect of welding heat to the fuse termination, and the while is also fixing and protected the wire bonds position, has avoided lead-in wire to come off again, strengthens the ability that lead-in wire resists bending repeatedly and external force resistance to impact.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an A place enlarged diagram among Fig. 1.

Among the figure: 1, shell; 2, fuse; 3, resin dosing equipment layer; 4, glass insulator; 5, lead-in wire; 6, adhesive tape; 7, positioning table; 8, can cut down quoit; 9, fairlead.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and instantiation.

As shown in Figure 1, a kind of capacitor all-sealed structure, comprise hermetically sealed metal shell 1 and inner core group thereof, described core group comprises the contact conductor 5 at fuse 2 and fuse 2 two ends, described fuse 2 outer walls are coated with heatproof adhesive tape 6, and described fuse 2 terminations are fixing by resin dosing equipment layer 3, and the inwall at described shell 1 two ends is provided with positioning table 7, be equipped with insulator on the described positioning table 7, described insulator comprises glass insulator 4 and can cut down quoit 8.Cut down quoit 8 solders side of the aspect ratio insulator at positioning table 7 two ends exceed 1mm～2mm, to guarantee welding quality.

As preferably, positioning table 7 degree of depth are 0.2mm～1.0mm, and the situation very thin to the metal shell wall must be considered the mechanical strength of difficulty of processing, positioning table and the sealing property after the welding, wall thickness≤0.5mm, and then the working depth of positioning table is 0.25mm ± 0.05mm.

Assembly technology of the present utility model is as follows:

After the core group coats heatproof adhesive tape 6; in advance a termination is sealed with resin dosing equipment layer 3; play electric insulation, reduce the effect of welding heat the radiation effect of fuse 2 terminations; also fix and protected lead-in wire 5 welding positions simultaneously; avoid lead-in wire 5 to come off again, strengthened the lead-in wire 5 anti-abilities of bending repeatedly.

The core group length that coats heatproof adhesive tape 6 is no more than the position of positioning table 7, pack into and weld in advance in the shell 1 of an insulator, welding lead 5 seals with the fairlead 9 of insulator then, use resin dosing equipment layer 3 fixed core group again, the height of resin dosing equipment layer 3 in shell 1 is 1/3～1/5 shell 1 height, in filling process, must allow the core group end face that is exposed at the upper end cover with resin, since such fixed form can increase the dielectric strength of lead-in wire 5 and 1 on shell, strengthen the impact resistance of capacitor, and can make things convenient for technological operation, can raise the efficiency again.

Behind the resin solidification, the cut down quoit 8 and shell 1 of welding another one insulator will go betweens 5 and insulator fairlead 9 welded seals then, thereby finish whole assembling technology procedure.

Capacitor of the present utility model shows that in the practical effect of emphasis kind and the check result of every performance index structural design of the present utility model and simplification implementation of processes process were both effective, very necessary again.

Claims

1. capacitor all-sealed structure, comprise shell (1) and inner core group thereof, it is characterized in that: described core group comprises the contact conductor (5) at fuse (2) and fuse (2) two ends, described fuse (2) termination is fixing by resin dosing equipment layer (3), the inwall at described shell (1) two ends is provided with positioning table (7), and described positioning table is equipped with insulator on (7).

2. a kind of capacitor all-sealed structure according to claim 1 is characterized in that: described insulator comprises the cut down quoit with step (8) in the glass insulator (4) and the outside thereof.

3. a kind of capacitor all-sealed structure according to claim 1 is characterized in that: described shell (1) is hermetically sealed metal shell.

4. a kind of capacitor all-sealed structure according to claim 1 is characterized in that: described fuse (2) outer wall is coated with heatproof adhesive tape (6).