Thin film capacitor with built-in core limiting structure

Abstract

The utility model discloses a film capacitor with a built-in core limiting structure, which comprises a capacitor shell, rectangular grooves are formed in two sides of an inner cavity of the capacitor shell, plastic elastic sheets are fixedly connected to the inner walls of the rectangular grooves, and limiting clamping strips are fixedly connected to the top ends of the plastic elastic sheets. Two limiting clamping strips are arranged in the inner cavity of the capacitor shell, the opposite sides of the two limiting clamping strips are provided with inner inclined planes, the opposite sides of the two limiting clamping strips are provided with outer inclined planes, the inner cavity of the capacitor shell is provided with a laminated core, and the opposite sides of the two limiting clamping strips are clamped at the top of the laminated core. According to the utility model, the top of the laminated core is clamped and limited through the cooperative use of the plastic elastic sheet and the limiting clamping strip, so that the laminated core is stably installed in the inner cavity of the capacitor shell, and meanwhile, the laminated core is further limited and fixed under the cooperative use of the re-pressing assembly, so that the service life of the laminated core is prolonged. Therefore, the purposes of simple and rapid installation and firm dual-locking installation are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of thin film capacitor processing technology, and in particular relates to a thin film capacitor with an internal core limiting structure. Background Technology

[0002] Multilayer film capacitor core: Also known as multilayer core, it is the core energy storage component of film capacitor. It is mainly composed of several layers of metallized film (a very thin metal layer is deposited on the surface of the insulating film as an electrode) stacked or wound in an alternating manner. Between these metallized films, the insulating film plays the role of isolating different electrodes, so that the capacitor can store charge on the metallized film electrodes when voltage is applied, realizing the mutual conversion of electrical energy and electric field energy.

[0003] In the manufacturing of film capacitors, the process of installing the core into the capacitor casing and fixing it is quite cumbersome. It usually requires the use of additional fixing components to achieve the positioning of the core, which increases the complexity of the production process. Moreover, the stability of the single-clamp fixing method may be insufficient. Therefore, there is a need to provide a film capacitor with a built-in core limiting structure, which adopts a dual locking method of clamp positioning and compression limiting to effectively fix the core, ensuring the convenience of core installation and the stability after installation. Utility Model Content

[0004] The purpose of this invention is to provide a thin-film capacitor with a built-in core limiting structure, which uses a dual locking method of clip positioning and compression limiting to effectively fix the core, ensuring the convenience of core installation and stability after installation, thereby solving the above-mentioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A thin film capacitor with a built-in core limiting structure includes a capacitor shell: rectangular grooves are provided on both sides of the inner cavity of the capacitor shell, plastic springs are fixedly connected to the inner walls of the rectangular grooves, limiting strips are fixedly connected to the top of the plastic springs, inner inclined surfaces are provided on the opposite sides of the two limiting strips, and outer inclined surfaces are provided on the opposite sides of the two limiting strips. A stacked core is installed in the inner cavity of the capacitor shell, and the opposite sides of the two limiting strips are engaged with the top of the stacked core. A pressure assembly is provided above the inner cavity of the capacitor shell. The pressure assembly includes a pressure plate engaged with the top of the capacitor shell, and wedge plates are fixedly connected to both sides of the bottom of the pressure plate. The surface of the wedge plates is tightly fitted with the outer inclined surfaces of the limiting strips.

[0006] Preferably, elastic clips are fixedly connected to both sides of the pressure plate, and rectangular slots are opened on the top of both sides of the inner cavity of the capacitor shell, and the elastic clips are engaged in the inner cavity of the rectangular slots.

[0007] Preferably, insulating pads are bonded to both sides of the bottom of the pressure plate, and the bottom of the insulating pads is tightly fitted to the top of the rectangular groove.

[0008] Preferably, comb-shaped clamping plates are fixedly connected to the bottom of both sides of the inner cavity of the capacitor shell, and the stacked core is engaged between the two comb-shaped clamping plates.

[0009] Preferably, the angle between the top of the pressure plate and the inner wall of the capacitor casing is filled with sealant.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model uses plastic springs and limiting strips to lock and limit the top of the stacked core, so that it is stably installed in the inner cavity of the capacitor shell. At the same time, with the cooperation of the pressure-reinforcing component, the stacked core is further limited and fixed, thus achieving the purpose of simple and quick installation and double locking and reliable installation.

[0012] 2. This utility model uses the combination of elastic clips and rectangular slots to limit and fix the pressure plate, so that the pressure plate can be stably locked onto the top of the capacitor shell, and the wedge plate can be tightly attached to the outer inclined surface of the limiting clip to squeeze and limit the limiting clip.

[0013] 3. The present invention uses a comb-shaped clamping plate to press and position the surface of the stacked core, so that the stacked core can be accurately installed in the center of the inner cavity of the capacitor shell, ensuring the stability of the stacked core after installation. Attached Figure Description

[0014] in:

[0015] Figure 1 This is a front cross-sectional view of one embodiment of the present invention;

[0016] Figure 2 This is one embodiment of the present utility model. Figure 1 A magnified view of point A in the middle;

[0017] Figure 3 This utility model provides an embodiment of a capacitor housing, a laminated core, and a multi-voltage assembly.

[0018] Exploded view of the body;

[0019] Figure 4 This invention provides a three-dimensional representation of a capacitor casing, plastic spring, and limiting strip according to one embodiment of the present invention.

[0020] Schematic diagram.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Capacitor casing; 2. Rectangular groove; 3. Plastic spring; 4. Limiting strip; 5. Stacked core; 6. Re-pressing assembly; 61. Pressure plate; 62. Wedge plate; 63. Elastic strip; 64. Rectangular slot; 7. Insulating pad; 8. Comb-shaped plate. Detailed Implementation

[0023] In the following description, embodiments of the thin-film capacitor with the built-in core limiting structure of the present invention will be described with reference to the accompanying drawings.

[0024] Figure 1-4 This invention illustrates a film capacitor with a built-in core limiting structure according to an embodiment of the present invention. The capacitor includes a capacitor housing 1. Rectangular grooves 2 are provided on both sides of the inner cavity of the capacitor housing 1. Plastic spring pieces 3 are fixedly connected to the inner walls of the rectangular grooves 2. Limiting strips 4 are fixedly connected to the tops of the plastic spring pieces 3. An inner inclined surface is provided on one side of each of the two limiting strips 4 facing away from each other, and an outer inclined surface is provided on the other side. A stacked core 5 is installed in the inner cavity of the capacitor housing 1. The opposite sides of the two limiting strips 4 are engaged with the top of the stacked core 5. A pressure assembly 6 is provided above the inner cavity of the capacitor housing 1. The pressure assembly 6 includes a pressure plate 61 engaged with the top of the capacitor housing 1. Sealant is filled at the angle between the top of the pressure plate 61 and the inner wall of the capacitor housing 1. Elastic strips 63 are fixedly connected to both sides of the pressure plate 61. Rectangular slots 64 are provided on the tops of both sides of the inner cavity of the capacitor housing 1, and the elastic strips 63 are engaged with the rectangular slots 64. The inner cavity, through the cooperation of the elastic clip 63 and the rectangular slot 64, plays a role in limiting and fixing the pressure plate 61, so that the pressure plate 61 can be stably locked onto the top of the capacitor shell 1, thereby allowing the wedge plate 62 to be tightly attached to the outer inclined surface of the limiting clip 4, and squeezing and limiting the limiting clip 4. Insulating pads 7 are glued to both sides of the bottom of the pressure plate 61, and the bottom of the insulating pads 7 is tightly attached to the top of the rectangular groove 2. Comb-shaped clips 8 are fixedly connected to the bottom of both sides of the inner cavity of the capacitor shell 1. The stacked core 5 is locked between the two comb-shaped clips 8. The comb-shaped clips 8 play a role in squeezing and positioning the surface of the stacked core 5, so that the stacked core 5 can be accurately installed in the center position of the inner cavity of the capacitor shell 1, ensuring the stability of the stacked core 5 after installation. Wedge plates 62 are fixedly connected to both sides of the bottom of the pressure plate 61, and the surface of the wedge plates 62 is tightly attached to the outer inclined surface of the limiting clip 4.

[0025] Working Principle: When using this invention, the user places the stacked core 5 into the inner cavity of the capacitor casing 1. The bottom of the stacked core 5 first contacts the inner inclined surface of the limiting strip 4. Under the squeezing action of the stacked core 5, the plastic spring 3 and the limiting strip 4 are elastically squeezed into the inner cavity of the rectangular groove 2 until the bottom of the stacked core 5 is inserted between the two comb-shaped locking plates 8. Under the elastic force of the plastic spring 3, the limiting strip 4 resets and locks onto the top of the stacked core 5, thus limiting and fixing the stacked core 5. The user then clamps the pressure plate 61 onto the top of the capacitor casing 1, causing the elastic clip 63 to deform briefly and engage in the inner cavity of the rectangular slot 64. At the same time, the bottom of the insulating pad 7 is in contact with the top of the laminated core 5, and the surface of the wedge plate 62 is in close contact with the outer bevel of the limiting clip 4, further squeezing and limiting the limiting clip 4 to ensure the stability of the limiting clip 4 in limiting the laminated core 5. Finally, sealant is filled at the angle between the top of the pressure plate 61 and the inner wall of the capacitor casing 1 to seal the gap between them.

[0026] In summary, this film capacitor with built-in core limiting structure uses the plastic spring 3 and limiting strip 4 to lock and limit the top of the stacked core 5, making it stably installed in the inner cavity of the capacitor shell 1. At the same time, with the cooperation of the pressure-reinforcing component 6, the stacked core 5 is further limited and fixed, thus achieving the purpose of simple and quick installation and reliable double locking installation.

Claims

1. A thin film capacitor with built-in core limiting structure, characterized in that, The utility model provides a capacitor shell (1) is provided with rectangular recess (2) on both sides of the inner chamber, and the inner wall of rectangular recess (2) is fixedly connected with plastic spring piece (3), the top of plastic spring piece (3) is fixedly connected with limiting clamping strip (4), and the opposite side of two limiting clamping strips (4) is provided with inner inclined surface, and the side opposite to two limiting clamping strips (4) is provided with outer inclined surface, and the inner chamber of capacitor shell (1) is installed with laminated core (5), and the top of two limiting clamping strips (4) is clamped in laminated core (5) on both sides, and the upper portion of capacitor shell (1) is provided with complex pressure assembly (6), and complex pressure assembly (6) includes the pressing plate (61) clamped in capacitor shell (1) top, and the bottom of pressing plate (61) is fixedly connected with wedge plate (62) on both sides, and the surface of wedge plate (62) is tightly attached with the outer inclined surface of limiting clamping strip (4).

2. The thin film capacitor of claim 1, wherein, The both sides of pressing plate (61) are fixedly connected with elastic clamping strip (63), and the top of both sides of capacitor shell (1) inner chamber is provided with rectangular clamping groove (64), and elastic clamping strip (63) is clamped in the inner chamber of rectangular clamping groove (64).

3. The thin film capacitor of claim 2, wherein, The bottom of pressing plate (61) is adhered with insulating pad (7) on both sides, and the bottom of insulating pad (7) is tightly attached with the top of rectangular recess (2).

4. The thin film capacitor of claim 3, wherein the inner core limiting structure is formed by a plurality of protrusions formed on the inner core. The bottom of both sides of capacitor shell (1) inner chamber is fixedly connected with comb-shaped clamping plate (8), and laminated core (5) is clamped between two comb-shaped clamping plates (8).

5. The thin film capacitor of claim 4, wherein the inner core limiting structure is formed by a plurality of protrusions formed on the inner core and a plurality of recesses formed on the outer core. The angle between the top of pressing plate (61) and the inner wall of capacitor shell (1) is filled with sealant.

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