A capacitor with anti-leakage function

Abstract

The utility model discloses a leakage-proof capacitor, comprising a capacitor housing, a capacitor core, an extraction electrode and a leakage-proof rubber plug; the capacitor housing has a receiving cavity with an opening at one end, and the receiving cavity is filled with a potting material; the side wall of the capacitor housing is provided with an electrode extraction port; the capacitor core is arranged in the receiving cavity, one end of the extraction electrode is connected to the electrode surface of the capacitor core, and the other end is extended from the electrode extraction port to the outside of the capacitor housing; the outer diameter of the leakage-proof rubber plug gradually decreases from one end to the other end along its axial direction, the leakage-proof rubber plug is coaxially sleeved on the extraction electrode, and the end with a smaller outer diameter of the leakage-proof rubber plug cooperates with the electrode extraction port to block the electrode extraction port. The technical solution of the utility model embodiment can improve the production efficiency of the capacitor and ensure the leakage-proof effect.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a leakage-proof capacitor. Background Art

[0002] Capacitors are important passive components, among which film capacitors are widely used in electronic equipment, industrial control, automobiles and other fields. Film capacitors are generally composed of capacitor cores, lead electrodes (usually leads, welding pieces or busbars), packaging shells, filling resins and the like. For products where the lead electrodes need to pass through the packaging shell from the side, leakage must be prevented at the place where the lead electrodes and the packaging shell fit. In the current technical solutions, leakage is often prevented by applying glue at the corresponding positions. However, due to the particularity of their structure, many products cannot be automatically glued and require manual glue application, which is not only inefficient, but also the quality of the glue cannot be guaranteed, leading to leakage. Therefore, how to improve the production efficiency of capacitors and ensure the anti-leakage effect has become a technical problem that needs to be solved urgently. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the above technology at least to a certain extent. To this end, the purpose of the utility model is to provide a capacitor with anti-leakage material, so as to improve the production efficiency of the capacitor and ensure the anti-leakage material effect.

[0004] To achieve the above-mentioned purpose, an embodiment of the utility model proposes a leakage-proof capacitor, comprising a capacitor housing, a capacitor core, a lead-out electrode and a leakage-proof rubber plug; the capacitor housing has a accommodating cavity with an opening at one end, and the accommodating cavity is filled with a potting material; the side wall of the capacitor housing is provided with an electrode lead-out port; the capacitor core is arranged in the accommodating cavity, one end of the lead-out electrode is connected to the electrode surface of the capacitor core, and the other end extends out of the capacitor housing from the electrode lead-out port; the outer diameter of the leakage-proof rubber plug gradually decreases along its axial direction from one end to the other end, the leakage-proof rubber plug is coaxially sleeved on the lead-out electrode, and the end of the leakage-proof rubber plug with a smaller outer diameter cooperates with the electrode lead-out port to block the electrode lead-out port.

[0005] According to the leakage-proof capacitor of the embodiment of the utility model, the leakage-proof rubber plug is arranged, and the outer diameter of the leakage-proof rubber plug gradually decreases along its axial direction from one end to the other end. The leakage-proof rubber plug is coaxially sleeved on the lead-out electrode, and the end with the smaller outer diameter of the leakage-proof rubber plug cooperates with the electrode lead-out port on the capacitor housing to block the electrode lead-out port, thereby eliminating the need for production personnel to manually apply glue, thereby improving the production efficiency of the capacitor and ensuring the leakage-proof effect.

[0006] In addition, the leakage-proof capacitor according to the above embodiment of the utility model may also have the following additional technical features:

[0007] Optionally, the inner diameter of the electrode lead-out port gradually increases from the inside of the capacitor housing to the outside, the anti-leakage rubber plug is located outside the capacitor housing, the end with a smaller outer diameter of the anti-leakage rubber plug faces the capacitor housing, and the outer wall of the anti-leakage rubber plug fits with the inner wall of the electrode lead-out port.

[0008] Optionally, the inner diameter of the electrode lead-out port gradually decreases from the inside of the capacitor housing to the outside, the leak-proof rubber plug is located in the accommodating cavity, the end of the leak-proof rubber plug with a smaller outer diameter faces the outside of the capacitor housing, and the outer wall of the leak-proof rubber plug fits with the inner wall of the electrode lead-out port.

[0009] Optionally, a positioning structure is provided on the outer side wall of the lead-out electrode, the positioning structure protrudes from the outer side wall of the lead-out electrode and is located on a side of the leak-proof rubber plug close to the center of the accommodating cavity.

[0010] Optionally, the positioning structure includes at least one of point-shaped protrusions, column-shaped protrusions and line-shaped protrusions.

[0011] Optionally, the lead electrode is any one of a lead wire, a welding piece or a bus bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of a leakage-proof rubber plug of a capacitor according to an embodiment of the utility model being located inside the capacitor;

[0013] Figure 2 This is a schematic structural diagram of a leakage-proof rubber plug of a capacitor according to another embodiment of the utility model being located outside the capacitor;

[0014] Figure 3 This is a schematic structural diagram of a leak-proof rubber plug according to an embodiment of the utility model;

[0015] Figure 4 The figure is a schematic diagram of assembling a leak-proof rubber plug and a lead-out electrode with a positioning structure according to an embodiment of the utility model.

[0016] Description of reference numerals: capacitor housing 100 , lead-out electrode 200 , leak-proof rubber plug 300 , positioning structure 210 . DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In order to better understand the above technical solution, 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 accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, 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.

[0019] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Please refer to Figures 1 to 3 The embodiment of the utility model provides a leakage-proof capacitor, including a capacitor housing 100 , a capacitor core, a lead-out electrode 200 and a leakage-proof rubber plug 300 .

[0021] Specifically, the capacitor housing 100 can be in any shape, such as a square body, a cylinder, etc. The capacitor housing 100 has a receiving cavity with one end open, and the receiving cavity is used to receive other components. When the other components are placed, the receiving cavity can be filled with potting material to fix the other components. The side wall of the capacitor housing 100 is provided with an electrode lead-out port, and the electrode lead-out port can be in any shape, and its size can be sufficient to allow the lead-out electrode 200 to pass through.

[0022] The capacitor core is arranged in the accommodating cavity, and the capacitor core has an electrode surface for circuit connection. It should be noted that the number of the capacitor cores can be one, two or any number above two. When the number of the capacitor cores is multiple, the multiple capacitor cores are connected in parallel in the accommodating cavity.

[0023] One end of the lead electrode 200 is connected to the electrode surface of the capacitor core, and the other end extends from the electrode lead outlet to the outside of the capacitor housing 100. The portion extending from the capacitor housing 100 can be used for capacitor installation and circuit connection. In one example, the lead electrode 200 can be any one of a lead, a welding piece, or a busbar.

[0024] The leak-proof rubber plug 300 can be made of an elastic material, such as silicone or rubber. The outer diameter of the leak-proof rubber plug 300 gradually decreases from one end to the other end along its axial direction, so that the leak-proof rubber plug 300 is generally trapezoidal. When installed, the leak-proof rubber plug 300 is coaxially sleeved on the lead-out electrode 200, and the end of the leak-proof rubber plug 300 with a smaller outer diameter cooperates with the electrode lead-out port to block the electrode lead-out port to prevent leakage.

[0025] In one embodiment, the inner diameter of the electrode lead-out port gradually increases from the inside of the capacitor housing 100 to the outside. At this time, the anti-leakage rubber plug 300 is located outside the capacitor housing 100, with the end with a smaller outer diameter facing the capacitor housing 100. When the assembly is completed, the outer wall of the anti-leakage rubber plug 300 can fit with the inner wall of the electrode lead-out port, thereby blocking the electrode lead-out port and preventing the potting material from leaking out of the electrode lead-out port.

[0026] In another embodiment, the inner diameter of the electrode lead-out port gradually decreases from the inside of the capacitor housing 100 to the outside. At this time, the anti-leakage rubber plug 300 is located inside the capacitor housing 100, that is, in the accommodating cavity. The end of the anti-leakage rubber plug 300 with a smaller outer diameter faces the outside of the capacitor housing 100. When the assembly is completed, the outer wall of the anti-leakage rubber plug 300 can fit with the inner wall of the electrode lead-out port, thereby blocking the electrode lead-out port and preventing the potting material from leaking out of the electrode lead-out port.

[0027] It should be understood that, through the design of the outer diameter of the leak-proof rubber plug 300, the outer contour of the leak-proof rubber plug 300 can play a guiding role, which is convenient for assembly. And the outer wall of the leak-proof rubber plug 300 fits with the inner wall of the electrode lead-out port. When the leak-proof rubber plug 300 is subjected to an external force in its axial direction, the leak-proof rubber plug 300 and the electrode lead-out port, as well as the leak-proof rubber plug 300 and the lead-out electrode 200 can fit more closely, ensuring the stability of the assembly between the three.

[0028] Please refer to Figure 1 , 3 4. In one embodiment of the present invention, when the anti-leakage plug 300 is located in the accommodating cavity, a positioning structure 210 is provided on the outer wall of the lead-out electrode 200. The positioning structure 210 protrudes from the outer wall of the lead-out electrode 200 and is located on the side of the anti-leakage plug 300 close to the center of the accommodating cavity. It should be understood that the outer diameter of the positioning structure 210 is greater than the inner diameter of the anti-leakage plug 300. Thus, the positioning structure 210 can play a positioning effect on the anti-leakage plug 300 when the anti-leakage plug 300 is assembled to the lead-out electrode 200, and when the anti-leakage plug 300 is installed to the electrode lead-out port, the positioning structure 210 can apply a force from the inside to the outside to the anti-leakage plug 300, so that the anti-leakage plug 300 squeezes the lead-out electrode 200 and the capacitor housing 100, thereby achieving the purpose of preventing leakage.

[0029] In one embodiment, the positioning structure 210 may include at least one of a dot-shaped protrusion, a column-shaped protrusion, and a line-shaped protrusion.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A leakage-proof capacitor, characterized in that: It comprises a capacitor shell, a capacitor core, a lead-out electrode and a leak-proof rubber plug; the capacitor shell has a accommodating cavity with an opening at one end, and the accommodating cavity is filled with a potting material; the side wall of the capacitor shell is provided with an electrode lead-out port; the capacitor core is arranged in the accommodating cavity, one end of the lead-out electrode is connected to the electrode surface of the capacitor core, and the other end extends out of the capacitor shell from the electrode lead-out port; the outer diameter of the leak-proof rubber plug gradually decreases from one end to the other end along its axial direction, the leak-proof rubber plug is coaxially sleeved on the lead-out electrode, and the end of the leak-proof rubber plug with a smaller outer diameter cooperates with the electrode lead-out port to block the electrode lead-out port.

2. The capacitor according to claim 1, characterized in that The inner diameter of the electrode lead-out port gradually increases from the inside of the capacitor housing to the outside, the anti-leakage rubber plug is located outside the capacitor housing, the end of the anti-leakage rubber plug with a smaller outer diameter faces the capacitor housing, and the outer wall of the anti-leakage rubber plug fits with the inner wall of the electrode lead-out port.

3. The capacitor according to claim 1, characterized in that The inner diameter of the electrode lead-out port gradually decreases from the inside of the capacitor housing to the outside, the anti-leakage rubber plug is located in the accommodating cavity, the end of the anti-leakage rubber plug with a smaller outer diameter faces the outside of the capacitor housing, and the outer wall of the anti-leakage rubber plug fits with the inner wall of the electrode lead-out port.

4. The capacitor according to claim 3, characterized in that The outer side wall of the lead-out electrode is provided with a positioning structure, the positioning structure protrudes from the outer side wall of the lead-out electrode and is located on a side of the leak-proof rubber plug close to the center of the accommodating cavity.

5. The capacitor according to claim 4, characterized in that The positioning structure includes at least one of a dot-shaped protrusion, a column-shaped protrusion and a line-shaped protrusion.

6. The capacitor according to any one of claims 1 to 5, characterized in that: The lead-out electrode is any one of a lead wire, a welding piece or a busbar.

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