CN218868092U

CN218868092U - Fuse built-in power supply filter

Info

Publication number: CN218868092U
Application number: CN202222846519.4U
Authority: CN
Inventors: 谢力; 何天成
Original assignee: Sichuan Guoli Kechuang Technology Co ltd
Current assignee: Sichuan Guoli Kechuang Technology Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-04-14
Anticipated expiration: 2032-10-27

Abstract

The utility model provides a fuse built-in power supply filter, including electric connector, filter circuit board, metal casing and output lead wire, electric connector is circular structure, and the copper contact pin is installed to the terminal surface before the electric connector, and the output lead wire is installed to the rear end face, metal casing is cavity round platform structure, and the through-hole has been seted up to the terminal surface before the metal casing, and in the through-hole of terminal surface before the metal casing was installed to the electric connector, the output lead wire was drawn forth from the metal casing rear end face, filter circuit board sets up at the electric connector middle part, filter circuit board is circular circuit board, and filter circuit board is respectively in copper contact pin and output pin connection. According to the built-in power filter, after the power filter is installed, the electromagnetic immunity of a fuse is remarkably improved; the power supply filter does not occupy the space of the fuse function circuit, and a user does not need to increase other space sizes for the power supply filter; the scheme of three external standard size power filters can be replaced, and the space is saved for the whole system.

Description

Fuse built-in power supply filter

Technical Field

The utility model belongs to the wave filter field, in particular to fuse built-in power supply wave filter.

Background

The power supply module is a power supply device which can be directly attached to a printed circuit board, and is characterized in that the power supply module can provide power for an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a microprocessor, a memory, a Field Programmable Gate Array (FPGA) and other digital or analog loads, generally, the module is called a point of load (POL) power supply system or a point of use power supply system (PUPS), and because of the great advantages of a modular structure, the module power supply is widely used in the communication fields of switching equipment, access equipment, mobile communication, microwave communication, optical transmission, routers and the like, and in the fields of automotive electronics, aerospace and the like.

The switching power supply has the advantages of low power consumption, high efficiency, high power density, small volume, light weight, wide voltage stabilizing range and the like, the switching power supply has the defect of generating stronger electromagnetic interference (EMI), an EMI signal not only has a very wide frequency range but also has a certain amplitude, the electromagnetic environment is polluted by conduction emission and radiation emission, and interference is caused to communication equipment and electronic products, so that the electronic equipment does not meet the requirements of relevant electromagnetic compatibility standards, the main way of the switching power supply interference is the input end of the power supply, and the interference mainly comprises conduction emission interference and radiation emission interference.

At present, the fuse is used as a detonation device of a missile and is extremely important in the design of noise immunity. The fuze structure is generally made of metal materials, the electromagnetic sealing effect of the fuze body is good, and the weak point of the noise immunity is generally on cables which are externally connected, particularly power cables. If the fuze is not sufficiently immune, the missile is extremely likely to be caused to explode or not explode under specific conditions. The fuze is used as a part of the missile, the external dimension is generally completely fixed at the beginning of design, the space structure is quite tense for completing technical and tactical indexes, and if the subsequent fuze cannot smoothly pass through the fuze during immunity test, the design may be subversively adjusted in the rectification process so as to achieve the specified space dimension and meet the technical and tactical indexes and the electromagnetic immunity index of the fuze.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fuse embeds power filter has solved among the prior art at appointed space size, satisfies the technical and tactical index of fuse and the problem of electromagnetism immunity index simultaneously.

The technical scheme of the utility model is realized like this: the fuse built-in power supply filter comprises an electric connector, a filter circuit board, a metal shell and an output lead, wherein the electric connector is of a circular structure, a copper contact pin is installed on the front end face of the electric connector, the output lead is installed on the rear end face of the electric connector, the metal shell is of a hollow round platform structure, a through hole is formed in the front end face of the metal shell, the electric connector is installed in the through hole in the front end face of the metal shell, the output lead is led out from the rear end face of the metal shell, the filter circuit board is arranged in the middle of the electric connector and is of a circular circuit board, and the filter circuit board is connected with the copper contact pin and the output lead respectively.

This proposal provides a built-in power supply filter, can solve following technical problem: after the power supply filter is installed, the electromagnetic immunity of the fuse is obviously improved; the power supply filter does not occupy the space of the fuse function circuit, and a user does not need to increase other space sizes for the power supply filter; the scheme of three external standard size power filters can be replaced, and the space is saved for the whole system.

Furthermore, the output leads are divided into three bundles of output, the connecting lines of the middle points of the three output leads form an isosceles triangle, and the output leads are high-temperature silver-plated leads.

Furthermore, the filter circuit board adopts a three-way two-stage LC type pi-shaped filter circuit, an inductor in the circuit is wound by an amorphous magnetic ring, and a capacitor is welded on the filter circuit board by adopting MLCC.

Furthermore, the exterior of the electric connector is plated with chrome, and the electric connector is fixed with the metal shell through the connecting plate.

After the technical scheme is adopted, the beneficial effects of the utility model are that:

1. the power filter is made of high-reliability materials, has good filtering effect and is suitable for a direct-current power supply;

2. the power filter has a simple and reasonable structure, and effectively helps the fuze to improve the immunity without changing other structural parts;

3. the power filter has high integration level, and integrates three power filter circuits in a limited space.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a diagram of a single-beam power filter according to an embodiment of the present invention;

fig. 2 is a diagram of a three-beam power filter according to an embodiment of the present invention;

fig. 3 is a rear axial view of a three-beam power filter according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a filter circuit board according to an embodiment of the present invention.

In the drawings, 1-an electrical connector; 11-copper pins, 12-connecting plates and 2-filter circuit boards; 3-a metal housing; 31-round table, 32-placing cylinder and 4-output lead.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The embodiment is as follows:

as shown in fig. 1 to 4, the technical solution of the present invention is realized as follows: fuse built-in power supply filter, including electric connector 1, filter circuit board 2, metal casing 3 and output lead 4, electric connector 1 is circular structure, and copper contact pin 11 is installed to the terminal surface before electric connector 1, and output lead 4 is installed to the rear end face, metal casing 3 is the cavity round platform structure, and the through-hole has been seted up to the terminal surface before the metal casing 3, and electric connector 1 installs in the through-hole of terminal surface before the metal casing 3, and output lead 4 draws forth from the 3 rear end face of metal casing, filter circuit board sets up in electric connector 1 middle part, filter circuit board 2 is circular circuit board, and filter circuit board 2 is connected in copper contact pin 11 and output lead 4 respectively.

The built-in power filter mainly comprises an electric connector, a filter circuit, a metal shell and an output lead part, wherein the electric connector is an aviation socket, a base material is a copper material, surface chrome plating is performed, one end of the electric connector is a copper contact pin, the other end of the electric connector is a high-temperature silver-plated lead, the filter circuit board 2 adopts a three-way two-stage LC type pi-shaped filter circuit, an inductor in the circuit is wound by an amorphous magnetic ring, a capacitor adopts an MLCC (multi-level capacitor), and is welded on the filter circuit board, the metal shell is originally an electric connector fixing seat of a fuse, and after improvement, the metal shell is used as a shell of the power filter, the filter circuit is implanted into the shell, so that the fuse achieves the corresponding level of noise immunity on the premise of not changing the volume of the fuse, and the output lead of the power filter is a high-temperature silver-plated lead at the tail part of the electric connector after filtering treatment.

When the fuse is designed, the power supply filter circuit is generally designed on a functional circuit board of a user and is easy to receive space radiation interference of other circuits, the power supply filter circuit is isolated, the performance is more excellent, the power supply filter circuit is often dispersed when being arranged on the functional circuit board of the user and can be processed at an inlet of each power supply circuit, and the power supply filter processes multiple power supplies nearby at the tail of the connector and has high integration level. And a large space is saved.

The metal shell 3 comprises a round table 31 and a placing cylinder 32, and the length of the placing cylinder 32 is at least 10cm. The output lead 4 is divided into three bundles of output, the connecting lines of the middle points of the three output leads 4 form an isosceles triangle, and the output leads 4 adopt high-temperature silver-plated leads. The electric connector 1 is externally plated with chrome, and the electric connector 1 is fixed with the metal shell 3 through the connecting plate 12.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Fuse built-in power supply filter, its characterized in that, including electric connector (1), filter circuit board (2), metal casing (3) and output lead (4), electric connector (1) is circular structure, and copper contact pin (11) are installed to the terminal surface before electric connector (1), and output lead (4) are installed to the rear end face, metal casing (3) are cavity round platform structure, and the through-hole has been seted up to the terminal surface before metal casing (3), and electric connector (1) is installed in the through-hole of terminal surface before metal casing (3), and output lead (4) are drawn forth from metal casing (3) rear end face, filter circuit board sets up in electric connector (1) middle part, filter circuit board (2) are circular circuit board, and filter circuit board (2) are connected in copper contact pin (11) and output lead (4) respectively.

2. The fuze built-in power filter as set forth in claim 1, wherein: the output leads (4) are divided into three output beams, the connecting lines of the middle points of the three output leads (4) form an isosceles triangle, and the output leads (4) adopt high-temperature silver-plated leads.

3. The fuze internal power filter of claim 1, wherein: the filter circuit board (2) adopts a three-path two-stage LC type pi-shaped filter circuit, an inductor in the circuit is wound by an amorphous magnetic ring, and a capacitor is welded on the filter circuit board by adopting MLCC.

4. The fuze internal power filter of claim 1, wherein: the electric connector (1) is externally plated with chrome, and the electric connector (1) is fixed with the metal shell (3) through the connecting plate (12).