Internal isolation box for square metal shell

Abstract

The internal isolation box for the square metal shell comprises an isolation box body 1, the isolation box body 1 is placed in the metal shell 2, then a capacitor core is placed in the isolation box body 1, and the isolation box body 1 forms insulation isolation between the capacitor core and the metal shell 2; the surfaces of the four side surfaces of the isolation box body 1 are respectively provided with a plurality of 2mm strip-shaped bulges 101, and the strip-shaped bulges 101 not only can increase the strength of the isolation box body 1, but also can prevent the surface of the isolation box body 1 from being tightly attached to the metal shell 2, thereby being beneficial to the pouring of epoxy glue.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and in particular to an internal isolation box for a square metal casing. Background Technology

[0002] A capacitor consists of two closely spaced conductive electrodes separated by a layer of non-conductive insulating dielectric. The following is a detailed description of its structure:

[0003] Electrodes: Typically made of materials with good electrical conductivity, such as metals, they are used to store and release electrical charge. Factors such as the area, shape, and material of the electrodes affect the performance of the capacitor. For example, in a parallel-plate capacitor, the electrodes are generally two parallel metal plates; the larger the area, the larger the capacitance. In some miniaturized capacitors, the electrodes may adopt special shapes such as interdigitated shapes to increase the electrode area within a limited space.

[0004] Insulating medium, also known as dielectric, is an indispensable part of a capacitor. Its function is to separate the two electrodes, preventing direct charge conduction between them, while simultaneously inducing polarization under an electric field, thereby increasing the capacitor's charge storage capacity. Common insulating media include air, mica, ceramics, and plastic films. Different insulating media have different dielectric constants; the higher the dielectric constant, the larger the capacitance for the same electrode structure. For example, ceramics have a relatively high dielectric constant, so ceramic capacitors can typically achieve a large capacitance value in a smaller volume.

[0005] In addition, capacitors used in practical applications may also include some encapsulation materials to protect the internal electrodes and insulating dielectric from the influence of the external environment, ensuring the stable and reliable performance of the capacitor.

[0006] For capacitors with metal casings, the internal capacitor core needs to be electrically isolated from the casing. This is usually achieved by using multiple insulating boards to form a frame, then wrapping the core with insulating tape or insulating paper, and finally encapsulating it with epoxy material. These operations are labor-intensive and inefficient. Utility Model Content

[0007] In order to solve the problems existing in the prior art, the present invention provides an internal isolation box for a square metal shell.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] The square metal casing uses an internal isolation box, which includes an isolation box body 1. The isolation box body 1 is placed inside the metal casing 2, and then the capacitor core is placed inside the isolation box body 1. The isolation box body 1 forms an insulating barrier between the capacitor core and the metal casing 2. The four sides of the isolation box body 1 have multiple 2mm strip-shaped protrusions 101. These strip-shaped protrusions 101 can both increase the strength of the isolation box body 1 and prevent the surface of the isolation box body 1 from being in close contact with the metal casing 2, which is conducive to the injection of epoxy resin.

[0010] This utility model also has the following additional technical features:

[0011] As a further specific optimization of the technical solution of this utility model: the isolation box body 1 is made of PP material and injection molded into a square box.

[0012] As a further specific optimization of the technical solution of this utility model: epoxy resin is poured into the gap between the isolation box body 1 and the metal shell 2.

[0013] As a further specific optimization of the technical solution of this utility model: Multiple positioning posts are provided on the outer surface of the bottom of the isolation box body 1, and multiple positioning holes are provided on the inner surface of the bottom of the metal shell 2. These positioning holes cooperate with the positioning posts to ensure that the isolation box body 1 can be stably placed inside the metal shell 2, preventing displacement during capacitor core installation or epoxy resin injection. Furthermore, the positioning holes also help to enhance the connection strength between the isolation box body 1 and the metal shell 2 after the epoxy resin has cured, improving the stability and durability of the overall structure.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] This utility model has a simple structure, is easy to process and manufacture, and greatly reduces production costs. Through the design of the isolation box body 1, effective insulation isolation between the capacitor core and the metal shell 2 is achieved, improving the safety and reliability of the capacitor. The design of the strip-shaped protrusion 101 not only enhances the strength of the isolation box body 1, but also avoids close contact with the metal shell 2, providing convenience for the injection of epoxy glue and ensuring the uniformity and sealing of the glue. The cooperative design of the positioning post and positioning hole makes the positioning of the isolation box body 1 within the metal shell 2 more accurate and stable, improving the assembly efficiency of the capacitor and the stability of the overall structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Isolation box body; 101. Strip-shaped protrusion; 2. Metal shell. Detailed Implementation

[0018] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

[0019] The square metal casing houses a specially designed isolation box, consisting of an isolation box body 1, which is precisely positioned within the interior space of the metal casing 2. Inside the isolation box body 1, the capacitor core is carefully positioned, ensuring a good insulating layer between the capacitor core and the metal casing 2. To further enhance the isolation effect, multiple 2mm strip-shaped protrusions 101 are designed on the four sides of the isolation box body 1. These strip-shaped protrusions 101 not only improve the structural strength of the isolation box body 1 but also effectively prevent direct contact between the surface of the isolation box body 1 and the metal casing 2, thus facilitating the pouring of epoxy resin.

[0020] The insulating box body 1 is a square box made of PP material through injection molding. Its design takes into account the fit with the metal shell 2. Therefore, epoxy resin is poured into the gap between the insulating box body 1 and the metal shell 2 to further enhance the insulation effect and structural stability.

[0021] To ensure the stable placement of the isolation box body 1 within the metal shell 2, multiple positioning posts are specially designed on the outer bottom surface of the isolation box body 1. Simultaneously, multiple corresponding positioning holes are provided on the inner bottom surface of the metal shell 2. The precise fit between these positioning holes and the positioning posts ensures that the isolation box body 1 will not shift during capacitor core installation or epoxy resin injection. Furthermore, the positioning hole design also enhances the connection strength between the isolation box body 1 and the metal shell 2. After the epoxy resin cures, this structural design helps improve the overall stability and durability of the structure, ensuring the long-term reliability of the capacitor assembly.

[0022] The above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

Claims

1. An internal isolation box for a square metal casing, characterized in that: The isolation box includes an isolation box body (1), which is placed in a metal shell (2), and then the capacitor core is placed in the isolation box body (1). The isolation box body (1) forms an insulating isolation between the capacitor core and the metal shell (2). The four sides of the isolation box body (1) have multiple 2mm strip-shaped protrusions (101).

2. The internal isolation box for a square metal casing according to claim 1, characterized in that: The isolation box body (1) is made of PP material and injection molded into a square box.

3. The internal isolation box for a square metal casing according to claim 1, characterized in that: Epoxy resin is poured into the gap between the isolation box body (1) and the metal shell (2).

4. The internal isolation box for a square metal casing according to claim 1, characterized in that: Multiple positioning posts are provided on the outer surface of the bottom of the isolation box body (1), and multiple positioning holes are provided on the inner surface of the bottom of the metal shell (2), which cooperate with the positioning posts.

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