Capacitor

Abstract

The utility model discloses a capacitor, which can conveniently detect whether an insulating part is assembled on a product according to requirements or not. The capacitor comprises a capacitor shell, a capacitor core, a filler, an extraction electrode and an insulating part, the capacitor shell comprises a metal part and is provided with an accommodating cavity; the capacitor core is arranged in the accommodating cavity; the filler is filled and sealed in the accommodating cavity; the extraction electrode is embedded in the filler, and one end of the extraction electrode is electrically connected with the capacitor core; the insulating part is arranged between the extraction electrode and the metal part, and the extraction electrode is provided with an elastic part which elastically abuts against the insulating part.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor which is convenient for detecting product quality. Background Art

[0002] Film capacitors are widely used in electronic equipment, industrial control, automobile and other technical fields. They are generally packaged in plastic shells, but in some special applications, in order to improve the installation strength of the shell or to achieve better heat dissipation performance, metal shells are used to package film capacitors.

[0003] In order to protect the personal safety of users, national regulations require that the electrodes and the packaging shell of film capacitors must meet certain withstand voltage requirements. When using metal shell packaging, in order to meet this withstand voltage requirement, it is necessary to install an insulating part between the electrode and the metal shell. After the packaging is completed, since the insulating part is encapsulated inside the product, it is impossible to effectively detect whether the insulating part is assembled as required. Utility Model Content

[0004] The utility model aims to provide a capacitor, which solves the problems existing in the prior art and can conveniently detect whether the product has insulating parts assembled as required.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A capacitor comprises a capacitor case, a capacitor core, a filler, a lead electrode and an insulating member; the capacitor case comprises a metal portion and is provided with a cavity; the capacitor core is arranged in the cavity; the filler is encapsulated in the cavity; the lead electrode is buried in the filler, and one end of the lead electrode is electrically connected to the capacitor core; the insulating member is provided between the lead electrode and the metal portion, and the lead electrode is provided with an elastic portion that elastically abuts against the insulating member.

[0007] The lead-out electrode is provided with a notch, and the elastic part is formed in the notch by bending.

[0008] Preferably, the elastic portion is made of the same material as the lead-out electrode and is fixed to the lead-out electrode by welding.

[0009] Alternatively, a contact surface is provided in the middle of the elastic portion, and the contact surface is in surface contact with the insulating member.

[0010] The other end of the lead-out electrode is provided with at least one connection terminal.

[0011] The filler is epoxy resin.

[0012] The entire capacitor housing is made of metal material. Alternatively, the metal part is the chassis part of the capacitor housing.

[0013] After adopting the above technical solution, the utility model has the following technical effects:

[0014] The utility model sets an elastic part between the lead-out electrode and the metal part. Under normal circumstances, the elastic part will be against the insulating part. When the insulating part inside the product is missing, the lead-out electrode will directly contact the metal part through the elastic part, and a low resistance state will be presented between the lead-out electrode and the capacitor housing. The resistance between the two or the withstand voltage test can be tested to detect whether the product has the insulating part assembled as required, and the operability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the first embodiment of the utility model;

[0016] Figure 2 This is an exploded view of the first embodiment of the utility model;

[0017] Figure 3 It is a cross-sectional view of the first embodiment of the utility model;

[0018] Figure 4 It is a cross-sectional view of the second embodiment of the utility model;

[0019] Description of Figure Numbers:

[0020] 1-capacitor housing; 11-metal part; 12-cavity;

[0021] 2-Capacitor core;

[0022] 3- Filling;

[0023] 4-lead electrode; 41-elastic portion; 411-contact surface; 42-notch; 43-connection terminal;

[0024] 5-Insulation parts. DETAILED DESCRIPTION

[0025] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0026] refer to Figures 1 to 4 As shown, the utility model discloses a capacitor, comprising a capacitor housing 1, a capacitor core 2, a filler 3, an extraction electrode 4 and an insulating member 5;

[0027] The capacitor housing 1 includes a metal portion 11 and is provided with a cavity 12;

[0028] The capacitor core 2 is disposed in the cavity 12;

[0029] The filler 3 is encapsulated in the cavity 12;

[0030] The lead electrode 4 is buried in the filler 3, one end of which is electrically connected to the capacitor core 2, and the other end is exposed from the filler 3 so as to be connected to an external electrical device;

[0031] The insulating member 5 is disposed between the lead electrode 4 and the metal portion 11 , and the lead electrode 4 is provided with an elastic portion 41 that elastically contacts the insulating member 5 .

[0032] Through the above scheme, the utility model sets an elastic part 41 between the lead-out electrode 4 and the metal part 11. Under normal circumstances, the elastic part 41 will be against the insulating part 5. When the insulating part 5 inside the product is missing, the lead-out electrode 4 will directly contact the metal part 11 through the elastic part 41, and a low resistance state will be presented between the lead-out electrode 4 and the capacitor housing 1. The resistance between the two or the withstand voltage test can be tested to detect whether the product has the insulating part 5 assembled as required, and the operability is high.

[0033] In some embodiments of the present invention, the lead-out electrode 4 is provided with a notch 42, and the elastic portion 41 is formed in the notch 42 by bending, and is integrally formed with the lead-out electrode 4, which is convenient for processing. In addition, the elastic portion 41 can also be made of the same material as the lead-out electrode 4, and fixedly connected to the lead-out electrode 4 by welding or the like.

[0034] Furthermore, the middle portion of the elastic portion 41 is bent to form a contact surface 411, which is in surface contact with the insulating part 5 to achieve a larger contact area. When the insulating part 5 is missing, the elastic portion 41 is not easily affected by the sealing of the filler 3 and detached from the metal portion 11, and the missing of the insulating part 5 is more easily detected.

[0035] In some embodiments of the present invention, at least one wiring terminal 43 is disposed at the other end of the lead-out electrode 4 for connecting to an external electrical device.

[0036] In some embodiments of the present invention, the filler 3 is epoxy resin.

[0037] It is understandable that the capacitor generally has at least two lead electrodes 4 , and the elastic portion 41 is disposed on the lead electrode 4 that is closer to the metal portion 11 .

[0038] See also Figures 1 to 3 , showing the first embodiment of the utility model.

[0039] In the first embodiment, the entire capacitor housing 1 is made of metal material, that is, the metal portion 11 is the entire capacitor housing 1 .

[0040] The elastic portion 41 is disposed near the bottom surface of the cavity 11 and is also located below the capacitor core 2 .

[0041] See also Figure 4 , showing the second embodiment of the utility model.

[0042] In the first embodiment, only a part of the capacitor case 1 is made of metal material, and the metal part 11 is the bottom plate of the capacitor case 1 .

[0043] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A capacitor, characterized in that: It includes capacitor casing, capacitor core, filler, lead-out electrode and insulating member; The capacitor housing includes a metal portion and is provided with a cavity; The capacitor core is arranged in the cavity; The filler is encapsulated in the cavity; The lead electrode is buried in the filler, and one end of the lead electrode is electrically connected to the capacitor core; The insulating member is disposed between the extraction electrode and the metal portion, and the extraction electrode is provided with an elastic portion elastically abutting against the insulating member.

2. The capacitor according to claim 1, wherein: The lead-out electrode is provided with a notch, and the elastic part is formed in the notch by bending.

3. The capacitor according to claim 2, wherein: The elastic part is made of the same material as the lead-out electrode and is fixed on the lead-out electrode by welding.

4. The capacitor according to claim 2 or 3, characterized in that: A contact surface is provided in the middle of the elastic part, and the contact surface is in surface contact with the insulating member.

5. The capacitor according to claim 1, wherein: The other end of the lead-out electrode is provided with at least one connection terminal.

6. The capacitor according to claim 1, wherein: The filler is epoxy resin.

7. The capacitor according to claim 1, wherein: The entire capacitor housing is made of metal material.

8. The capacitor according to claim 1, wherein: The metal portion is a chassis portion of the capacitor case.

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