Thin film type capacitor

Abstract

The utility model relates to the technical field of capacitors, and discloses a film type capacitor, which comprises a shell and a bottom cover, a capacitor main body is arranged in the shell, two sides of the bottom cover are respectively provided with a telescopic groove, and locking blocks are movably arranged in the two telescopic grooves. A plurality of telescopic springs are fixedly connected between the two locking blocks and the opposite sides of the corresponding telescopic grooves, locking grooves are formed in the lower portions of the inner walls of the two sides of the shell, moving blocks are fixedly connected to the lower ends of the two locking blocks, an insulating layer is arranged on the inner wall of the shell, and a flame-retardant layer is arranged on the inner wall of the insulating layer. According to the utility model, through the arrangement of the shell and the bottom cover, the capacitor main body can be protected, the capacitor main body can be prevented from exploding accidentally, the external circuit can be protected, the loss can be reduced, and through the arrangement of the flame-retardant layer in the shell, the fire hazard can be effectively prevented, and the circuit can be effectively protected.

Description

Technical Field

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

[0002] Film capacitors, also known as plastic film capacitors, use plastic film as the dielectric, have many excellent properties, and have very small dielectric loss. They are a type of capacitor with excellent performance, and are therefore widely used.

[0003] Existing related film capacitors are generally installed directly in the circuit. When the capacitor is damaged or explodes accidentally, it is easy to injure the operator and also easily cause damage to other components in the circuit. The protection is poor. Therefore, the technical personnel in this field provide a film capacitor to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the present utility model is to solve the shortcomings of the prior art and to propose a film capacitor, which is provided with a shell and a bottom cover, thereby providing protection for the capacitor body and preventing the capacitor body from accidentally exploding, thereby providing protection for the external circuit and reducing losses.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a film capacitor, comprising a shell and a bottom cover, wherein a capacitor body is arranged inside the shell, telescopic grooves are provided on both sides of the bottom cover, locking blocks are movably provided inside the two telescopic grooves, a plurality of telescopic springs are fixedly connected between the two locking blocks and the opposite side of the corresponding telescopic grooves, locking grooves are provided at the lower part of the inner walls on both sides of the shell, and the lower ends of the two locking blocks are fixedly connected to movable blocks;

[0006] The inner wall of the shell is provided with an insulating layer, the inner wall of the insulating layer is provided with a flame retardant layer, and the middle parts of the outer walls on both sides of the shell are provided with a heat insulation layer;

[0007] Through the above technical scheme, by providing a shell and a bottom cover, it is possible to provide protection for the capacitor body and prevent the capacitor body from accidentally exploding, thereby providing protection for the external circuit and reducing losses. By providing a flame retardant layer, it is possible to effectively prevent fire and protect the circuit. By providing a heat insulating layer, when the capacitor body overheats and requires maintenance by an operator, the risk of scalding can be reduced.

[0008] Furthermore, a plurality of holding springs are fixedly connected to the upper end of the bottom cover, and a holding plate is fixedly connected to the upper ends of the plurality of holding springs;

[0009] Through the above technical solution, by providing a clamping spring and a clamping plate, the capacitor body can be firmly confined in the shell, so that the shell can not only provide protection for itself, but also prevent the capacitor body from accidentally exploding, and provide protection for the external circuit to reduce losses.

[0010] Furthermore, both sides of the lower end of the bottom cover are provided with toggle grooves, the two moving blocks are movably arranged in the corresponding toggle grooves, and the lower ends of the two moving blocks are provided with grooves;

[0011] Through the above technical solution, by providing the toggle slot and the groove, the operator can toggle the moving block to control the movement of the locking block, so as to achieve rapid disassembly and assembly operations.

[0012] Furthermore, the plurality of telescopic springs are movably arranged in the corresponding telescopic slots, and the two locking blocks are engaged in the corresponding locking slots;

[0013] Through the above technical solution, by movably arranging multiple telescopic springs in corresponding telescopic grooves and engaging two locking blocks in corresponding locking grooves, the locking blocks can be stably engaged in the locking grooves through the action of the telescopic springs, thereby fixing the bottom cover and the shell assembly together.

[0014] Furthermore, the insulating layer is made of polypropylene material;

[0015] Through the above technical solution, the insulating layer is made of polypropylene material, which has good insulation performance and chemical stability, and can effectively block the generation and propagation of electric arcs, thereby effectively preventing the surface current from harming the operator when the capacitor body is damaged.

[0016] Furthermore, the flame retardant layer is made of polyimide material;

[0017] Through the above technical solution, the flame retardant layer is made of polyimide material, which has good flame retardant properties and thermal conductivity, and can effectively prevent fire and improve heat dissipation effect.

[0018] Furthermore, the heat insulation layer is made of thermoplastic polyurethane material;

[0019] Through the above technical solution, by using thermoplastic polyurethane material to make the thermal insulation layer, it can effectively isolate heat transfer, and thus when the capacitor body overheats and requires operator maintenance, the risk of scalding can be reduced.

[0020] The utility model has the following beneficial effects:

[0021] 1. The utility model proposes a film capacitor, which is assembled and fixed with the shell body by installing the capacitor body into the shell and then installing the bottom cover. The bottom cover and the shell body are assembled and fixed together by means of the provided telescopic spring, the locking block and the locking groove. At the same time, the capacitor body can be firmly confined in the shell by means of the provided pressing spring and the pressing plate. Thus, the shell can not only provide protection for the capacitor body, but also prevent the capacitor body from accidentally exploding, thereby providing protection for the external circuit and reducing losses. Moreover, the detachment of the bottom cover is very simple. The fixing can be released by simply moving the moving block to disengage the locking block from the locking groove, so that the capacitor body can be taken out and installed.

[0022] 2. The utility model proposes a film-type capacitor, which is provided with a flame-retardant layer made of polyimide material, thereby effectively preventing fire and protecting the circuit, and is provided with a heat-insulating layer made of thermoplastic polyurethane material, which can effectively isolate heat transfer, thereby reducing the risk of burns when the capacitor body overheats and requires operator maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an axonometric diagram of a film capacitor proposed by the utility model;

[0024] Figure 2 A schematic front cross-sectional view of a film capacitor proposed by the utility model;

[0025] Figure 3 for Figure 2 A schematic diagram of the structure enlargement at the center A;

[0026] Figure 4 This is a schematic diagram of the internal structure of a film capacitor proposed by the utility model;

[0027] Figure 5 The utility model is a bottom view schematic diagram of a film capacitor.

[0028] Legend:

[0029] 1. Shell; 2. Capacitor body; 3. Bottom cover; 4. Telescopic slot; 5. Locking block; 6. Telescopic spring; 7. Locking slot; 8. Toggle slot; 9. Moving block; 10. Groove; 11. Clamping spring; 12. Clamping plate; 13. Insulating layer; 14. Flame retardant layer; 15. Heat insulation layer. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the specific implementation of the utility model to clearly and completely describe the technical solutions in the specific implementation of the utility model. Obviously, the specific implementation described is only a part of the specific implementation of the utility model, not all of the specific implementation. Based on the specific implementation of the utility model, all other specific implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1-5 , a specific implementation mode provided by the utility model: a film capacitor comprises a shell 1 and a bottom cover 3, a capacitor body 2 is arranged inside the shell 1, telescopic grooves 4 are provided on both sides of the bottom cover 3, locking blocks 5 are movably provided inside the two telescopic grooves 4, a plurality of telescopic springs 6 are fixedly connected between the two locking blocks 5 and the opposite side of the corresponding telescopic grooves 4, locking grooves 7 are provided at the lower part of the inner walls on both sides of the shell 1, a moving block 9 is fixedly connected to the lower end of the two locking blocks 5, a plurality of holding springs 11 are fixedly connected to the upper end of the bottom cover 3, a plurality of holding springs 11 are fixedly connected to the upper end of the holding plate 12, by providing the holding springs 11 and the holding plate 12, the capacitor body 2 can be firmly confined in the shell 1, so that the shell 1 can provide protection for itself and prevent When the capacitor body 2 explodes unexpectedly, it can provide protection for the external circuit and reduce losses. Both sides of the lower end of the bottom cover 3 are provided with toggle grooves 8, and the two moving blocks 9 are movably arranged in the corresponding toggle grooves 8. The lower ends of the two moving blocks 9 are provided with grooves 10. By providing the toggle grooves 8 and the grooves 10, the operator can toggle the moving blocks 9 to control the movement of the locking blocks 5 to achieve rapid disassembly and assembly operations. Multiple telescopic springs 6 are movably arranged in the corresponding telescopic grooves 4, and the two locking blocks 5 are engaged in the corresponding locking grooves 7. By movably arranging the multiple telescopic springs 6 in the corresponding telescopic grooves 4 and engaging the two locking blocks 5 in the corresponding locking grooves 7, the locking blocks 5 can be stably engaged in the locking grooves 7 through the action of the telescopic springs 6, so that the bottom cover 3 and the shell 1 are combined and fixed together;

[0032] An insulating layer 13 is provided on the inner wall of the shell 1, and the insulating layer 13 is made of polypropylene material. By using polypropylene material to make the insulating layer 13, it has good insulation performance and chemical stability, can effectively block the generation and propagation of electric arcs, and thus effectively prevent the surface current from hurting the operator when the capacitor body 2 is damaged. A flame retardant layer 14 is provided on the inner wall of the insulating layer 13, and the flame retardant layer 14 is made of polyimide material. By using polyimide material to make the flame retardant layer 14, it has good flame retardant performance and thermal conductivity, can effectively prevent fire and improve the heat dissipation effect. A heat insulation layer 15 is provided in the middle of the outer walls on both sides of the shell 1. The heat insulation layer 15 is made of thermoplastic polyurethane material. By using thermoplastic polyurethane material to make the heat insulation layer 15, it can effectively isolate heat transfer, and thus when the capacitor body 2 is overheated and needs operator maintenance, the risk of scalding can be reduced.

[0033] Working principle: When in use, the capacitor body 2 can be loaded into the shell 1, and then the bottom cover 3 can be installed. The bottom cover 3 and the shell 1 are combined and fixed together through the telescopic spring 6, the locking block 5 and the locking groove 7. At the same time, the capacitor body 2 can be firmly confined in the shell 1 through the tightening spring 11 and the tightening plate 12, so that the shell 1 can not only provide protection for the capacitor body 2, but also prevent the capacitor body 2 from accidentally exploding, and provide protection for the external circuit to reduce losses. The removal of the bottom cover 3 is very simple. It only needs to be released by moving the moving block 9 to make the locking block 5 disengage from the locking groove 7, so that the capacitor body 2 can be taken out and installed. At the same time, the flame retardant layer 14 made of polyimide material can effectively prevent fire and protect the circuit. The heat insulation layer 15 made of thermoplastic polyurethane material can effectively isolate heat transfer, so when the capacitor body 2 overheats and needs to be repaired by the operator, the risk of scalding can be reduced.

[0034] Finally, it should be noted that the above is only a preferred specific implementation method of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned specific implementation methods, those skilled in the art can still modify the technical solutions recorded in the aforementioned specific implementation methods, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A film capacitor, comprising a housing (1) and a bottom cover (3), characterized in that: A capacitor body (2) is arranged inside the housing (1), telescopic slots (4) are provided on both sides of the bottom cover (3), locking blocks (5) are movably arranged inside the two telescopic slots (4), a plurality of telescopic springs (6) are fixedly connected between the two locking blocks (5) and the opposite side of the corresponding telescopic slots (4), locking slots (7) are provided at the lower part of the inner walls on both sides of the housing (1), and the lower ends of the two locking blocks (5) are fixedly connected to movable blocks (9); The inner wall of the shell (1) is provided with an insulating layer (13), the inner wall of the insulating layer (13) is provided with a flame retardant layer (14), and the middle parts of the outer walls on both sides of the shell (1) are provided with a heat insulation layer (15).

2. A film capacitor according to claim 1, characterized in that: A plurality of holding springs (11) are fixedly connected to the upper end of the bottom cover (3), and a holding plate (12) is fixedly connected to the upper ends of the plurality of holding springs (11).

3. A film capacitor according to claim 1, characterized in that: Both sides of the lower end of the bottom cover (3) are provided with toggle grooves (8), the two moving blocks (9) are movably arranged in the corresponding toggle grooves (8), and the lower ends of the two moving blocks (9) are provided with grooves (10).

4. A film capacitor according to claim 1, characterized in that: The plurality of telescopic springs (6) are movably arranged in the corresponding telescopic slots (4), and the two locking blocks (5) are snap-fitted in the corresponding locking slots (7).

5. A film capacitor according to claim 1, characterized in that: The insulating layer (13) is made of polypropylene material.

6. A film capacitor according to claim 1, characterized in that: The flame retardant layer (14) is made of polyimide material.

7. A film capacitor according to claim 1, characterized in that: The heat insulation layer (15) is made of thermoplastic polyurethane material.

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