Capacitor

Abstract

The utility model provides a capacitor. The capacitor comprises a housing, a core, an extraction electrode and an elastic sealing plug. The shell is provided with a first installation space and a second installation space in a limited mode, the first installation space and the second installation space are each provided with an opening, and the first installation space and the second installation space are communicated with a first through hole. The core is mounted in the first mounting space; the extraction electrode is connected with the core, and a first extraction end of the extraction electrode extends out of the second mounting space through the first through hole; the elastic sealing plug is provided with a second through hole for the first leading-out end to penetrate through, and the elastic sealing plug can be sleeved into the second installation space from the first leading-out end so that sealing can be formed between the first installation space and the second installation space. The capacitor can effectively prevent the leakage of the filling material, facilitates the improvement of the production efficiency of the capacitor, and can reduce the reject ratio of the production of the capacitor.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, specifically to a capacitor. Background Technology

[0002] Film capacitors are widely used in electronic equipment, industrial control, automobiles and other fields. Film capacitors are generally composed of a core (including plates, dielectric and metal layers sprayed on the two end faces), lead electrodes (usually leads, solder pads or busbars), a package shell, and filling resin (such as epoxy resin). When filling resin, for products where the lead electrodes need to penetrate the package shell, leakage needs to be prevented at the joint between the electrodes and the package shell.

[0003] Existing technology prevents resin leakage by applying glue. However, the glue application process has the following problems: due to the special structure of many products, glue cannot be applied automatically and requires manual application. This is not only inefficient, but also makes it difficult to quantify the amount of glue applied, which can easily lead to uneven application, resulting in leakage and increasing the product defect rate. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, the purpose of this invention is to provide a capacitor that effectively prevents leakage of the filler material, helps improve capacitor production efficiency, and reduces the defect rate in capacitor production.

[0005] To achieve the above objectives, this utility model proposes a capacitor, which includes: a shell, a core, lead electrodes, and an elastic sealing plug;

[0006] The outer casing is provided with a first installation space and a second installation space, both of which are open, and the first installation space and the second installation space are connected by a first through hole.

[0007] The core is installed within the first installation space;

[0008] The lead-out electrode is connected to the core, and the first lead-out end of the lead-out electrode extends out of the second mounting space through the first through hole;

[0009] The elastic sealing plug is provided with a second through hole through which the first lead-out end passes. The elastic sealing plug can be fitted from the first lead-out end into the second mounting space to form a seal between the first mounting space and the second mounting space.

[0010] According to the present invention, a capacitor is provided with an elastic sealing plug at the gap between the lead-out end of the lead electrode and the first through hole of the outer shell. This prevents the resin from leaking out from the gap when the core and lead electrode inside the shell are filled with resin. This method is different from the traditional coating method, which helps to improve the production efficiency of the capacitor and can reduce the defect rate of the capacitor production.

[0011] In addition, the capacitor proposed according to the above embodiments of this utility model may also have the following additional technical features:

[0012] Optionally, the second mounting space protrudes beyond the plane containing the bottom wall of the first mounting space.

[0013] Optionally, the elastic sealing plug is provided with an annular groove surrounding the second through hole, and the elastic sealing plug is abutted against the annular groove by a tool to fit the elastic sealing plug into the second installation space.

[0014] Furthermore, the second through hole has a first guide angle at the insertion end that can guide the first lead-out end into the second through hole, and the elastic sealing plug has a second guide angle at the insertion end that can guide the elastic sealing plug into the second installation space.

[0015] Optionally, the lead electrode includes a second lead that extends out of the first mounting space from the opening of the first mounting space.

[0016] Optionally, the elastic sealing plug is made of silicone. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a capacitor according to an embodiment of the present invention;

[0018] Figure 2 This is a structural schematic diagram of a capacitor according to an embodiment of the present invention from another perspective;

[0019] Figure 3 for Figure 2 Sectional view along AA;

[0020] Figure 4 This is a schematic diagram of the outer shell according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the elastic sealing plug according to an embodiment of the present utility model;

[0022] Figure 6 This is a structural schematic diagram of the elastic sealing plug according to another perspective of an embodiment of the present utility model;

[0023] Figure 7This is a schematic diagram of the tooling according to an embodiment of the present utility model;

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Outer shell, 11. First mounting space, 12. Second mounting space, 13. First through hole, 2. Core, 3. Lead electrode, 31. First lead end, 32. Second lead end, 4. Elastic sealing plug, 41. Second through hole, 42. Annular groove, 43. First guide angle, 44. Second guide angle, 5. Resin, 6. Tooling, 61. Annular flange, 62. Relief hole, 63. Abutment surface. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0029] The following is for reference. Figures 1-7 The implementation of the capacitor proposed in the embodiments of this utility model will be described in detail.

[0030] The capacitor according to an embodiment of the present invention includes: a shell 1, a core 2, lead electrodes 3, and an elastic sealing plug 4.

[0031] Specifically, the outer casing 1 is provided with a first mounting space 11 and a second mounting space 12, both of which are open, and the first mounting space 11 and the second mounting space 12 are connected by a first through hole 13; the core 2 is installed in the first mounting space 11; the lead electrode 3 is connected to the core 2, and the first lead end 31 of the lead electrode 3 extends out of the second mounting space 12 through the first through hole 13; the elastic sealing plug 4 is provided with a second through hole 41 through which the first lead end 31 passes, and the elastic sealing plug 4 can be fitted into the second mounting space 12 from the first lead end 31 so that a seal is formed between the first mounting space 11 and the second mounting space 12.

[0032] In other words, a core 2 is installed in the first mounting space 11, and an output electrode 3 is connected to the core 2. The first output end 31 of the output electrode 3 extends to the outside of the second mounting space 12 through the first through hole 13. In order to facilitate the extension of the first output end 31, there is a gap between the first output end 31 and the first through hole 13. When the filling resin 5 is filled into the first mounting space 11 from the opening, the resin 5 is easy to leak from the gap between the first output end 31 and the first through hole 13. The second through hole 41 of the elastic sealing plug 4 is inserted into the second mounting space 12, so that the second mounting space 12 and the first mounting space 11 form a seal, thereby preventing the resin 5 from leaking from the gap between the first output end 31 and the first through hole 13. This avoids the quality problem of resin 5 leakage caused by applying glue to the gap between the first output end 31 and the first through hole 13. The capacitor can effectively prevent the leakage of the filler material, which helps to improve the production efficiency of the capacitor and can reduce the defect rate of the capacitor production. The outer contour of the elastic sealing plug 4 is larger than the inner contour of the second mounting space 12, so that the elastic sealing plug 4 can be firmly inserted into the second mounting space 12. When the elastic sealing plug 4 is not inserted into the second mounting space 12, the second through hole 41 and the first lead-out end 31 can be either clearance fit or tight fit. The elastic sealing plug 4 can be an elliptical shape that matches the inner contour of the second mounting space 12, and the second through hole 41 can be a square shape that matches the first lead-out end 31. The first mounting space 11 and the second mounting space 12 can be integrally formed from the outer shell 1.

[0033] Therefore, by providing an elastic sealing plug 4 at the gap between the first lead-out end 31 of the lead-out electrode 3 and the first through hole 13 of the outer casing 1, the resin 5 can be prevented from leaking from the gap when the core 2 and the lead-out electrode 3 inside the outer casing 1 are filled with resin 5. This is different from the traditional coating method, which helps to improve the production efficiency of capacitors and can reduce the defect rate of capacitor production.

[0034] Optionally, the second mounting space 12 protrudes from the plane of the bottom wall of the first mounting space 11. Understandably, by protruding the second mounting space 12, it is possible to avoid placing the second mounting space 12 within the bottom wall of the first mounting space 11, thereby avoiding the need for a larger thickness in the outer casing 1 to machine the second mounting space 12 within the plane of the bottom wall, which helps control costs. Simultaneously, the protrusion extends the distance covering the first lead-out end 31, making the first lead-out end 31 more secure. The first mounting space 11 and the second mounting space 12 can share a common bottom wall. The second through hole 41 is located on the bottom wall and does not exceed the area enclosed by the inner wall of the second mounting space 12, facilitating the elastic sealing plug 4 to abut against the bottom wall to form a restraint.

[0035] Optionally, the elastic sealing plug 4 is provided with an annular groove 42 surrounding the second through hole 41. The elastic sealing plug 4 abuts against the annular groove 42 by the tooling 6 to fit the elastic sealing plug 4 into the second installation space 12. It can be understood that by providing the annular groove 42, it is easier to fit the elastic sealing plug 4 evenly into the second installation space 12 by cooperating with the tooling 6 to abut against the annular groove 42, thereby avoiding the elastic sealing plug 4 being misaligned or not in place, resulting in poor sealing effect. In addition, the provision of the annular groove 42 can also improve the deformation capability of the elastic sealing plug 4, making the installation of the elastic sealing plug 4 easier and the sealing effect better. The annular groove 42 can be provided with a contour that matches the cross-section of the first lead-out end 31. The tooling 6 is provided with a clearance hole 62 for the first lead-out end 31 to pass through, an annular flange 61 that matches the annular groove 42, and an abutment surface 63 that can abut against the end of the elastic sealing plug 4.

[0036] Furthermore, the second through hole 41 is provided with a first guide angle 43 at the insertion end, which can guide the first lead-out end 31 into the second through hole 41. The elastic sealing plug 4 is provided with a second guide angle 44 at the insertion end, which can guide the elastic sealing plug 4 into the second installation space 12. It can be understood that by setting the first guide angle 43, the entrance of the second through hole 41 is funnel-shaped, so that the elastic sealing plug 4 can be more easily fitted into the first lead-out end 31; by setting the second guide angle 44, the elastic sealing plug 4 is constricted at the insertion end, so that the elastic sealing plug 4 can be more easily inserted into the second installation space 12. This not only improves the installation efficiency of the elastic sealing plug 4, but also avoids the elastic sealing plug 4 being scratched by the outer shell 1 or the first lead-out end 31.

[0037] Optionally, the lead electrode 3 includes a second lead 32, which extends out of the opening of the first mounting space 11. Understandably, by having the second lead 32 extend out of the opening of the first mounting space 11, the capacitor can have multiple leads, thereby meeting practical application requirements.

[0038] Optionally, the elastic sealing plug 4 is made of silicone. Understandably, since silicone has good elasticity, temperature resistance, insulation and wear resistance, using silicone can improve the service life of the elastic sealing plug 4, improve the sealing effect, and thus ensure the quality of the capacitor.

[0039] Alternatively, the second installation space 12 can be configured with a small opening and a large interior to facilitate the confinement of the elastic sealing plug 4 within the second installation space 12. The opening of the second installation space 12 can be made to pass through the annular flange 61 of the tooling 6.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A capacitor, characterized in that, include: The outer casing, core, lead-out electrodes, and elastic sealing plug; The outer casing is provided with a first installation space and a second installation space, both of which are open, and the first installation space and the second installation space are connected by a first through hole. The core is installed within the first installation space; The lead-out electrode is connected to the core, and the first lead-out end of the lead-out electrode extends out of the second mounting space through the first through hole; The elastic sealing plug is provided with a second through hole through which the first lead-out end passes. The elastic sealing plug can be fitted from the first lead-out end into the second mounting space. The elastic sealing plug fits the inner wall of the second mounting space and the outer peripheral wall of the first lead-out end to form a seal between the first mounting space and the second mounting space.

2. The capacitor as claimed in claim 1, characterized in that, The second mounting space protrudes from the plane containing the bottom wall of the first mounting space.

3. The capacitor as claimed in claim 1, characterized in that, The elastic sealing plug is provided with an annular groove surrounding the second through hole. The elastic sealing plug is abutted against the annular groove by a tool to fit the elastic sealing plug into the second installation space.

4. The capacitor as claimed in claim 3, characterized in that, The second through hole has a first guide angle at the insertion end that can guide the first lead end into the second through hole, and the elastic sealing plug has a second guide angle at the insertion end that can guide the elastic sealing plug into the second installation space.

5. The capacitor as claimed in claim 1, characterized in that, The lead-out electrode includes a second lead-out end, which extends out of the first mounting space from the opening of the first mounting space.

6. The capacitor as claimed in claim 1, characterized in that, The elastic sealing plug is made of silicone.

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