Side outlet hole type capacitor

Abstract

The utility model discloses a side outlet hole type capacitor, which is characterized in that a side outlet hole is arranged at one side of the circle center of a top cover, and a lead terminal is hermetically connected in the side outlet hole, so that an anode lead and a cathode lead pass through the outer side of a film roll and are connected with metal spraying layers at the two ends of the film roll; therefore, a limiting protrusion in clearance fit with the central through hole of the core rod can be arranged in the center of the bottom of the shell to pre-limit the core, a positioning plate is installed above the core, and an elastic positioning rod in interference fit with the central through hole of the core rod is arranged in the center of the positioning plate to limit displacement of the core in the horizontal direction. The pressing columns are arranged on the peripheral side of the positioning rod and abut against the top face of the core to limit displacement of the core in the vertical direction, the core is fixed, deviation of the installation position of the core is avoided, it is guaranteed that the core is installed in the center of the shell in the middle, and the installation efficiency and the installation effect are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical instruments and relates to a capacitor, in particular to a side-outlet type capacitor. Background Art

[0002] Capacitors are one of the electronic components used in large quantities in electronic devices. They are widely used in circuits for DC isolation, AC passing, coupling, bypassing, filtering, tuning circuits, energy conversion, and control. Capacitors come in many types depending on the dielectric, such as electrolyte capacitors, paper capacitors, film capacitors, ceramic capacitors, mica capacitors, and air capacitors. Among them, film capacitors use metal foil as electrodes, overlap it with plastic films such as polyethylene, polypropylene, polystyrene, or polycarbonate, and wind it into a cylindrical structure to form a capacitor. With the development of technology, the replacement cycle of electronics, home appliances, communications, and other industries is getting shorter and shorter, and film capacitors have become an indispensable electronic component for promoting the replacement of the above industries with their good electrical performance and high reliability.

[0003] Existing film capacitors usually use metallized film, which is made by vacuum evaporating a thin layer of metal on a plastic film as an electrode, and then winding the metallized film on a core rod to make a core. In the process of making film capacitors, in order to fix the core and ensure complete insulation between the core and the shell, epoxy resin encapsulation is generally used. The epoxy resin used for encapsulation not only has excellent insulation properties, but also adds fillers such as alumina to make it have excellent thermal conductivity. During the epoxy resin encapsulation process, since there is no positioning device on the capacitor shell, the staff needs to manually measure the installation position of the core, and the capacitor core is easy to float when filling the epoxy resin, resulting in deviations in the installation position of the core, and it is impossible to ensure that the core is installed in the center of the shell, resulting in low installation efficiency and poor effect. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a side-outlet hole type capacitor, which fixes the core by arranging a positioning device that cooperates with the central through hole of the core rod in the capacitor to avoid deviation of the core installation position, thereby significantly improving the installation efficiency and installation effect.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A side-outlet hole capacitor comprises a shell, a core installed in the shell, a top cover sealed on the shell and a lead terminal passing through the top cover, wherein the core is composed of a hollow core rod and a film roll wound on the core rod, both ends of the film roll are provided with a gold spraying layer, the lead terminal has a positive lead and a negative lead, the lead terminal is sealed and connected in the side-outlet hole on one side of the center of the top cover, so that the positive lead and the negative lead both pass from the outside of the film roll and are electrically connected to the gold spraying layers at both ends of the film roll respectively, and a limiting protrusion is provided at the center of the bottom of the shell, so that when the core is installed in the shell, the limiting protrusion is inserted into the central through hole of the core rod to fit the clearance.

[0007] Furthermore, it also includes a positioning plate installed in the shell, and an elastic positioning rod is provided at the center of the positioning plate, so that when the positioning plate is installed above the core, the positioning rod is inserted into the central through hole of the core rod for interference fit.

[0008] Furthermore, the positioning rod is made of a heat-conducting material to conduct heat from the core.

[0009] Furthermore, a first through hole is formed on the positioning plate to fill epoxy resin between the core and the shell.

[0010] Furthermore, a second through hole is provided on the positioning plate to lead out and position the positive electrode lead and the negative electrode lead connected to both ends of the film roll.

[0011] Furthermore, a plurality of pressure columns are evenly distributed on the circumference of the positioning rod, so that when the positioning plate is installed above the core, the plurality of pressure columns respectively abut against the top surface of the core.

[0012] Furthermore, the gold-sprayed layer is a zinc layer, the conductive metal wires of the positive electrode lead and the negative electrode lead are zinc wires, and the positive electrode lead and the negative electrode lead are respectively welded to the gold-sprayed layer at both ends of the film roll by spraying zinc.

[0013] Furthermore, a connecting clamp is provided at the bottom of the shell, and the connecting clamp has a V-shaped claw and two opposite elastic cards, so that the connecting clamp is clamped in the installation hole of the device to fix the shell.

[0014] The beneficial effects of the utility model: the side-outlet hole type capacitor provided by the present application is provided with a side-outlet hole on one side of the center of the top cover, and the lead terminal is sealed and connected in the side-outlet hole, so that the positive lead and the negative lead both pass through the outside of the film roll, and the gold-sprayed layer at both ends of the film roll is connected, so that a limiting protrusion that matches the clearance of the central through hole of the core rod can be provided at the center of the bottom of the shell to pre-limit the core, and a positioning plate is installed above the core, and an elastic positioning rod that is interference-fitted with the central through hole of the core rod is provided at the center of the positioning plate to limit the horizontal displacement of the core, and a pressure column is provided on the side of the positioning rod to press against the top surface of the core to limit the vertical displacement of the core, fix the core, avoid deviation of the core installation position, ensure that the core is centrally installed in the center position of the shell, and significantly improve the installation efficiency and installation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a top view of the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of a mid-hole capacitor.

[0018] Figure 4 A top view of a center-hole capacitor. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-2 As shown, the utility model provides a side-outlet type capacitor, including a shell 1, a core 2 installed in the shell 1, a top cover 3 sealed on the shell 1 and a lead terminal 4 passing through the top cover 3, the core 2 is composed of a hollow core rod 21 and a film roll 22 wound on the core rod 21, both ends of the film roll 22 are provided with a gold spraying layer 23, the lead terminal 4 has a positive lead 41 and a negative lead 42, the lead terminal 4 is sealed and connected to the side outlet hole on one side of the center of the top cover 3, so that the positive lead 41 and the negative lead 42 both pass from the outside of the film roll 22, and are respectively electrically connected to the gold spraying layers 23 at both ends of the film roll 22, and a limiting protrusion 11 is provided at the center of the bottom of the shell 1, so that when the core 2 is installed in the shell 1, the limiting protrusion 11 is inserted into the central through hole of the core rod 21 to fit the clearance and pre-limit the core 2.

[0021] The capacitor also includes a positioning plate 5 installed in the housing 1, and an elastic positioning rod 51 is provided in the center of the positioning plate 5, so that when the positioning plate 5 is installed above the core 2, the positioning rod 51 is inserted into the central through hole of the core rod 21 to fix the core 2 by interference fit, limiting the horizontal displacement of the core 2, and multiple pressure columns 54 are evenly distributed around the circumference of the positioning rod 51, so that when the positioning plate 5 is installed above the core 2, the multiple pressure columns 54 are respectively against the top surface of the core 2 to limit the vertical displacement of the core 2. The positioning rod 51 is made of a heat-conducting material to conduct heat from the core 2 and dissipate heat.

[0022] The positioning plate 5 is provided with a first through hole 52 to fill the epoxy resin 6 between the core 2 and the shell 1, and the positioning plate 5 is provided with a second through hole 53 to lead out and position the positive lead 41 and the negative lead 42 connected to the two ends of the film roll 22, which is not only beautiful, but also convenient for the encapsulation of the epoxy resin, and convenient for the cable control during the subsequent installation of the capacitor. A connecting clamp 12 is provided at the bottom of the shell 1, and the connecting clamp 12 has a V-shaped claw 13 and two opposite elastic cards 14, so that the connecting clamp 12 is clamped in the installation hole of the device to install and fix the shell 1.

[0023] The gold-sprayed layer 23 is a zinc layer, and the conductive metal wires of the positive lead 41 and the negative lead 42 are zinc wires. The positive lead 41 and the negative lead 42 are respectively welded to the gold-sprayed layer 23 at both ends of the film roll 22 by spraying zinc. Since the materials of the positive lead 41, the negative lead 42 and the gold-sprayed layer 23 are all pure zinc, the bonding degree between zinc and zinc is stronger than the bonding degree between zinc and tin. When the lead is welded by spraying pure zinc, the lead is embedded in the pure zinc environment and combined with the core 2, thereby improving the pulling force between the core 2 and the lead. Among them, spraying pure zinc is to short-circuit the two zinc wires of the lead with positive and negative charges, blast the zinc into fine particles under strong current, and spray them at the place where the lead contacts the zinc layer. No zinc spraying is required at other places, that is, a spraying point is formed.

[0024] Compared with the prior art, the existing film capacitors are usually mid-hole capacitors, such as Figure 3-4As shown, the lead terminal 4 is sealed and connected to the center hole at the center of the top cover 3, so that one of the positive lead 41 and the negative lead 42 passes through the central through hole of the core rod 21 and is electrically connected to the gold spray layer 23 at the bottom end of the film roll 22. Therefore, it is impossible to set a positioning device that cooperates with the central through hole of the core rod 21 in the capacitor, which affects the installation efficiency and effect of the core 2. The side-outlet hole type capacitor provided by the present application is characterized in that a side-outlet hole is provided on one side of the center of the circle of the top cover, and the lead terminal is sealed and connected in the side-outlet hole, so that both the positive lead and the negative lead pass through the outside of the film roll, and the gold-sprayed layers at both ends of the film roll are connected, so that a limiting protrusion that matches the clearance of the central through hole of the core rod can be provided at the center of the bottom of the shell to pre-limit the core, and a positioning plate is installed above the core, and an elastic positioning rod that is interference-fitted with the central through hole of the core rod is provided at the center of the positioning plate to limit the horizontal displacement of the core, and a pressure column is provided on the side of the positioning rod to press against the top surface of the core to limit the vertical displacement of the core, so as to fix the core, avoid deviation of the core installation position, and ensure that the core is centrally installed in the center position of the shell, thereby significantly improving the installation efficiency and installation effect.

[0025] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A side-outlet capacitor, comprising a housing (1), a core (2) installed in the housing (1), a top cover (3) sealed on the housing (1), and a lead terminal (4) passing through the top cover (3), wherein the core (2) is composed of a hollow core rod (21) and a film roll (22) wound on the core rod (21), both ends of the film roll (22) are provided with a gold spraying layer (23), and the lead terminal (4) has a positive lead wire (41) and a negative lead wire (42), characterized in that: The lead terminal (4) is sealed and connected to the side outlet hole on the center side of the top cover (3), so that the positive lead (41) and the negative lead (42) can pass through the outside of the film roll (22) and are respectively electrically connected to the gold spray layer (23) at both ends of the film roll (22). A limiting protrusion (11) is provided at the center of the bottom of the shell (1), so that when the core (2) is installed in the shell (1), the limiting protrusion (11) is inserted into the center through hole of the core rod (21) to fit the clearance.

2. The capacitor according to claim 1, characterized in that It also includes a positioning plate (5) installed in the shell (1), and an elastic positioning rod (51) is provided at the center of the positioning plate (5), so that when the positioning plate (5) is installed above the core (2), the positioning rod (51) is inserted into the central through hole of the core rod (21) to achieve interference fit.

3. The capacitor according to claim 2, characterized in that The positioning rod (51) is made of a heat-conducting material to conduct heat away from the core (2).

4. The capacitor according to claim 2, characterized in that The positioning plate (5) is provided with a first through hole (52) for filling epoxy resin (6) between the core (2) and the shell (1).

5. The capacitor according to claim 2, characterized in that A second through hole (53) is provided on the positioning plate (5) to lead out and position the positive electrode lead (41) and the negative electrode lead (42) connected to the two ends of the film roll (22).

6. The capacitor according to claim 2, characterized in that A plurality of pressure columns (54) are evenly distributed around the circumference of the positioning rod (51), so that when the positioning plate (5) is installed above the core (2), the plurality of pressure columns (54) respectively abut against the top surface of the core (2).

7. The capacitor according to claim 1, characterized in that The gold-sprayed layer (23) is a zinc layer, the conductive metal wires of the positive lead (41) and the negative lead (42) are zinc wires, and the positive lead (41) and the negative lead (42) are respectively welded to the gold-sprayed layer (23) at both ends of the film roll (22) by zinc-spraying.

8. The capacitor according to claim 1, characterized in that A connecting clamp (12) is provided at the bottom of the shell (1), and the connecting clamp (12) has a V-shaped clamping claw (13) and two opposite elastic clamps (14) so ​​as to clamp the connecting clamp (12) into the installation hole of the device to install and fix the shell (1).

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