Open type capacitor metal shell

Abstract

The utility model discloses an open type capacitor metal shell, which relates to the technical field of capacitor shells, and comprises a capacitor shell, two groups of basin-shaped gaps and a filling part, and the two groups of basin-shaped gaps are symmetrically arranged on the left side and the right side of the open end of the capacitor shell; according to the utility model, more flowing space is provided for the epoxy resin through the arrangement of the filling block, the epoxy resin can flow into the filling block in the filling process and forms a tenon-and-mortise-like structure after being cured, and the structure enables the epoxy resin and the capacitor shell to be combined not only through the adhesive force of the surface, but also through the arrangement of the filling block. In addition, the filling blocks can still buffer stress generated by temperature changes in the curing process and the using process of the epoxy resin to a certain degree, and when the epoxy resin is heated to expand or contracts when encountering cold, the epoxy resin is not prone to deformation. The filling blocks can provide a certain space to enable the epoxy resin to have space for stretching and retracting.

Description

Technical Field

[0001] This utility model relates to the field of capacitor housing technology, specifically to an open-type capacitor metal housing. Background Technology

[0002] In the field of electronic equipment, capacitor performance is related to the stability of equipment operation. Open-type capacitors are widely used due to their structural advantages. They are encapsulated in a metal shell and filled with epoxy resin to protect the internal core.

[0003] Currently, most open-type capacitors use direct epoxy resin injection for their metal casings. However, the thermal expansion coefficients of metal and epoxy resin differ greatly. During operation, thermal expansion and contraction cause displacement differences, which accumulate and eventually lead to the epoxy resin separating from the metal casing opening. The resulting gap allows air and moisture to easily corrode the capacitor core, resulting in a decrease in its electrical performance, a shortened lifespan, and in severe cases, failure. Utility Model Content

[0004] To solve the above-mentioned technical problems, an open-type capacitor metal casing is provided, which solves the problems existing in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an open-type capacitor metal shell, including a capacitor shell with one end open, and also including a basin-shaped notch for improving the bonding strength between epoxy resin and the capacitor shell and a filling part disposed in the basin-shaped notch;

[0006] The basin-shaped notch is in two sets, and the two sets of basin-shaped notches are symmetrically opened on the left and right sides of the opening end of the capacitor shell.

[0007] Preferably, the filling part is a filling block adapted to the shape of the basin-shaped notch, and the filling block can be detached from the inside of the basin-shaped notch.

[0008] Preferably, the open end of the capacitor casing is fitted with an inverted L-shaped connecting block, the top of which is fixedly connected to the top of the solid block.

[0009] Preferably, the bottom end of the connecting block is provided with a connecting groove, and a positioning stud that is perpendicularly fixed to the side wall of the capacitor shell is slidably provided on the inner side of the connecting groove. The end of the positioning stud is threadedly connected with a positioning nut that abuts against the connecting block.

[0010] Preferably, the cross-section of the basin-shaped notch is an isosceles trapezoid.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] (1) By setting up the solid block, more flow space is provided for epoxy resin. During the pouring process, epoxy resin can flow into the solid block and form a "mortise and tenon" structure after curing. This structure allows epoxy resin and capacitor shell to be bonded not only by surface adhesion but also by mechanical anchoring, which greatly enhances the bonding force. In addition, the solid block can also buffer the stress caused by temperature changes during the curing process and use of epoxy resin to a certain extent. When epoxy resin expands when heated or contracts when cooled, the solid block can provide a certain space for epoxy resin to expand and contract, avoiding stress concentration at the shell opening and reducing the risk of cracks or separation between epoxy resin and metal shell.

[0013] (2) By setting up the filling block, the filling block is similar to the existing blocking component, which effectively fills the basin-shaped gap during the transportation of the capacitor shell, increases the wall thickness of the capacitor shell at that point, and seals the inside of the basin-shaped gap. This can enhance the impact resistance of that part and prevent foreign objects, dust, moisture, etc. from entering through the gap, thus preventing adverse effects on the subsequent epoxy resin injection quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the capacitor housing structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the filling part structure of this utility model.

[0017] The numbers on the map are:

[0018] 1. Capacitor casing; 2. Basin-shaped notch; 3. Solid block; 4. Connecting block; 5. Connecting groove; 6. Positioning stud; 7. Positioning nut. Detailed Implementation

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] Reference Figure 1-3 As shown, an open-type capacitor metal casing includes a capacitor casing 1 with one end open;

[0021] Existing open-type capacitors typically use the capacitor casing 1 as the encapsulation carrier. During use, epoxy resin is directly injected into the capacitor casing 1 to protect and fix the internal core.

[0022] However, due to the different coefficients of thermal expansion of metal and epoxy resin, there will be a difference in thermal expansion and contraction when the temperature changes, which may lead to a displacement difference between the two, and then cause the epoxy resin to separate from the capacitor shell 1. The gap created by the separation will allow air and moisture to easily enter the inside of the capacitor shell 1, corroding the core. In the long run, this will affect the performance of the capacitor and shorten the service life of the product.

[0023] Therefore, referring to Figure 1 and Figure 2 As shown, it is worth noting that a basin-shaped notch 2 is also included to enhance the bonding strength between the epoxy resin and the capacitor casing 1.

[0024] There are two sets of basin-shaped notches 2, which are symmetrically opened on the left and right sides of the opening end of the capacitor shell 1, and the cross-section of the basin-shaped notches 2 is an isosceles trapezoidal shape.

[0025] By setting the basin-shaped notch 2, more flow space is provided for the epoxy resin. During the pouring process, the epoxy resin can flow into the basin-shaped notch 2 and form a "mortise and tenon" structure after curing. This structure allows the epoxy resin and the capacitor shell 1 to be bonded not only by surface adhesion but also by mechanical anchoring, which greatly enhances the bonding force. In addition, the basin-shaped notch 2 can also buffer the stress caused by temperature changes during the curing process and use of the epoxy resin to a certain extent. When the epoxy resin expands when heated or contracts when cooled, the basin-shaped notch 2 can provide a certain space for the epoxy resin to expand and contract, avoiding stress concentration at the shell opening and reducing the risk of cracks or detachment between the epoxy resin and the metal shell.

[0026] Because of the opening of the basin-shaped notch 2, the wall thickness of the capacitor shell 1 at the basin-shaped notch 2 is relatively thin. As a result, this part is prone to dents and deformation due to collisions and impacts during the transportation of the capacitor shell 1, which affects the filling quality of epoxy resin inside the basin-shaped notch 2 later.

[0027] Furthermore, refer to Figure 1-3 As shown, it is worth noting that it also includes a filling section set inside the basin-shaped notch 2;

[0028] The filling part is a filling block 3 that is adapted to the shape of the basin-shaped notch 2. The filling block 3 can be detached from the inside of the basin-shaped notch 2.

[0029] By setting the filling block 3, which is similar to the existing blocking component, the filling block 3 effectively fills the basin-shaped gap 2 during the transportation of the capacitor housing 1, increases the wall thickness of the capacitor housing 1 at this location, and seals the inside of the basin-shaped gap 2. This not only enhances the impact resistance of this part, but also prevents foreign objects, dust, moisture and other substances from entering through the gap, thus preventing adverse effects on the subsequent epoxy resin injection quality.

[0030] Further reference Figure 2 and Figure 3 As shown, it is worth noting that the open end of the capacitor housing 1 is fitted with an inverted L-shaped connecting block 4. The top of the connecting block 4 is fixedly connected to the top of the solid block 3. The bottom end of the connecting block 4 is provided with a connecting groove 5. The inner side of the connecting groove 5 is slidably provided with a positioning stud 6 that is fixedly connected to the side wall of the capacitor housing 1 perpendicularly. The end of the positioning stud 6 is threadedly connected with a positioning nut 7 that abuts against the connecting block 4.

[0031] With the connection block 4, the positioning stud 6 and the positioning nut 7 set up, when the solid block 3 is embedded into the inner side of the basin-shaped notch 2, the positioning stud 6 can be simultaneously aligned and inserted into the inner side of the connection groove 5. Then, the positioning nut 7 is turned so that the positioning nut 7 slides along the rod of the positioning stud 6 under the thread structure until it abuts against the outer wall of the connection block 4. In this way, the connection block 4 and the solid block 3 can be effectively locked together.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An open-type capacitor metal casing, comprising a capacitor casing (1) with one end open, characterized in that, It also includes a basin-shaped notch (2) for improving the bonding strength between the epoxy resin and the capacitor shell (1) and a filling portion disposed in the basin-shaped notch (2); The basin-shaped notch (2) consists of two sets, which are symmetrically opened on the left and right sides of the opening end of the capacitor casing (1).

2. The open-type capacitor metal casing according to claim 1, characterized in that, The filling part is a filling block (3) that is adapted to the shape of the basin-shaped notch (2), and the filling block (3) can be detached from the inside of the basin-shaped notch (2).

3. The open-type capacitor metal casing according to claim 2, characterized in that, The capacitor casing (1) has an inverted L-shaped connecting block (4) at its open end, and the top of the connecting block (4) is fixedly connected to the top of the solid block (3).

4. The open-type capacitor metal casing according to claim 3, characterized in that, The bottom end of the connecting block (4) is provided with a connecting groove (5), and a positioning stud (6) is slidably provided on the inner side of the connecting groove (5) and is perpendicularly fixed to the side wall of the capacitor shell (1). The end of the positioning stud (6) is threadedly connected to a positioning nut (7) that abuts against the connecting block (4).

5. The open-type capacitor metal casing according to claim 1, characterized in that, The cross-section of the basin-shaped notch (2) is an isosceles trapezoid.

Images