CN112928909A

CN112928909A - EMI filtering device

Info

Publication number: CN112928909A
Application number: CN201911245069.XA
Authority: CN
Inventors: 熊瑞君; 梁异荣; 汪文峰; 蒋小刚
Original assignee: Chongqing Daji Electronic Technology Co ltd
Current assignee: Chongqing Daji Electronic Technology Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2021-06-08
Anticipated expiration: 2039-12-06
Also published as: CN112928909B

Abstract

The invention discloses an EMI filtering device, which comprises a shell and a cover plate, wherein a circuit board is fixedly connected to the shell, the shell and the cover plate are fixedly connected, a plurality of cavities are arranged in the shell, each cavity is separated by a partition plate, the circuit board is arranged in each cavity, the cover plate seals the opening end of each cavity, a base matched with the partition plates is arranged on the cover plate, a notch is formed in the base, and when the cover plate is fixedly connected with the shell, the free end of each partition plate can be embedded into the notch. The device can shield interference signals in each cavity in the use process through a series of structures, the connector can be fixed to a certain extent through the use of the base, the connecting rope can be used, the connecting line can be protected to a certain extent, and the service life of the device is prolonged to a certain extent.

Description

EMI filtering device

Technical Field

The invention relates to the field of filtering, in particular to an EMI filtering device.

Background

The filter is the electrical part commonly used in a circuit, and when the general filter is used, interference signals can be generated among all components in the filter, so that the normal use of all the components is influenced, and when the connector is connected with external equipment, the connecting line between the connector and the device needs to bear the gravity of the device, and the service life of the connecting line can be influenced in the long-term use process.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an EMI filter apparatus that effectively solves the problem that the use of the general filter apparatus is affected by an interference signal and the connection line is easily damaged.

The technical scheme of the invention is as follows: an EMI filtering device comprises a shell and a cover plate, wherein a circuit board is fixedly connected to the shell, the shell is fixedly connected with the cover plate, a plurality of cavities are arranged in the shell, each cavity is separated by a partition plate, the circuit board is arranged in each cavity, the cover plate seals the opening end of each cavity, a base matched with the partition plates is arranged on the cover plate, a notch is formed in the base, when the cover plate is fixedly connected with the shell, the free end of each partition plate can be embedded into the notch, a connector, a first rectangular connector and a second rectangular connector are sequentially arranged on the shell, a base used for placing the connector is fixedly connected to the shell, one end of a connecting rope is arranged on the base, a rotating shaft capable of freely rotating is arranged in the base, the connecting rope is wound on the second rotating shaft, and the other end of the connecting rope is connected to the connector; the base is provided with a clamping piece for fixing the connector, and the clamping piece can prevent the second rotating shaft from rotating when the connector is positioned on the base.

Preferably, a first rotating shaft is fixedly connected to the clamping piece, the free end of the first rotating shaft extends into the base, the clamping piece is of a plate-shaped structure and can rotate around the first rotating shaft in a vertical plane, a first torsion spring is sleeved outside the first rotating shaft, and when the clamping piece is in a horizontal position, the first torsion spring is in a free state.

Preferably, the second rotating shaft is located in the base, the second rotating shaft can freely rotate in the base, and a second torsion spring is sleeved outside the second rotating shaft.

Preferably, a first limiting block is fixedly connected to the first rotating shaft, a second limiting block is fixedly connected to the second rotating shaft, and when the clamping piece is clamped on the surface of the connector, the first limiting block extends into a rotating track of the second limiting block to prevent the second limiting block from rotating.

Preferably, a groove is formed in the base, and when the first torsion spring is in a free state, the clamping piece is located in the groove.

Preferably, the cover plate is connected with the shell through a cross-shaped groove countersunk head screw.

Preferably, a switch for controlling the on-off of the internal circuit is arranged on one side of the shell far away from the cover plate, and a plurality of interfaces are also arranged on the side of the shell.

Preferably, a magnetic clip is provided within the housing for securing the circuit board.

The invention has the beneficial effects that:

the problem of crosstalk coupling formed between interference signals can be prevented by arranging the partition plates between the chambers; the device adopts the design of a plurality of chambers inside, and is separated by the metal partition plates, so that the coupling phenomenon among different signals can be well inhibited, and the problem of electromagnetic compatibility in the signal transmission process among systems is further solved. The use of cooperating base and breach can guarantee mutual independence between every cavity when this device uses.

Through being provided with the switch, can directly control power supply through EMI filter, guarantee the security performance of product use.

Through being provided with the connection rope, can play certain guard action to the connecting wire when this device is connected with equipment. And when the connector is located on the base, the clamping piece can prevent the connecting rope from extending out, so that the connecting rope is prevented from being pulled out accidentally.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a side view of the housing.

Fig. 3 is a schematic view of a connection structure of the base and the connector.

Fig. 4 is an enlarged schematic view of a portion a in fig. 3.

Fig. 5 is an enlarged schematic structural view of the base.

Element number description: 1. a cover plate; 2. an inductance; 3. a housing; 4. a first circuit board; 5. a filter; 6. a connector; 7. a second circuit board; 8. a third circuit board; 9. a fourth circuit board; 10. a fifth circuit board; 11. a second rectangular connector; 12. magnetic clamping; 13. a first rectangular connector; 14. a base; 15. a groove; 16. a fastener; 17. connecting ropes; 18. a first rotating shaft; 19. a first torsion spring; 20. a first stopper; 21. a second rotating shaft; 22. a second torsion spring; 23. a second limiting block; 24. a base; 25. a notch; 26. a switch; 27. an interface; 28. a separator.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

referring to fig. 1-5, an EMI filter comprises a housing 3 and a cover plate 1, wherein a circuit board is fixedly connected to the housing 3, the housing 3 is fixedly connected to the cover plate 1, a plurality of chambers are arranged in the housing 3, each chamber is separated from another chamber by a partition plate 28, the partition plate 28 is made of metal, a circuit board is arranged in each chamber, a plurality of circuit boards are arranged in the EMI filter, the EMI filter comprises a first circuit board 4, a second circuit board 7, a third circuit board 8, a fourth circuit board 9 and a fifth circuit board 10, an inductor 2 and a filter 5 are arranged on the first circuit board 4, the specific internal structure of the EMI filter can refer to the filter with the model DJLCZJ-1814, the cover plate 1 seals the open end of each chamber, a base 24 matched with the partition plate 28 is arranged on the cover plate 1, a gap 25 is arranged on the base 24, when the cover plate 1 is fixedly connected to the housing 3, the free end of the partition plate 28 can be inserted into, the connector 6, the first rectangular connector 13 and the second rectangular connector 11 are sequentially arranged on the shell 3, a base 14 for placing the connector 6 is fixedly connected to the shell 3, a connecting line is arranged between the connector 6 and the inside of the device, the length of the connecting rope 17 is smaller than that of the connecting line, so that when the connecting rope 17 is in a tight state, the connecting line can still be in a loose state, one end of the connecting rope 17 is arranged on the base 14, a rotating shaft capable of rotating freely is arranged in the base 14, the connecting rope 17 is wound on the second rotating shaft 21, and the other end of the connecting rope 17 is connected to the connector 6; a latch 16 for fixing the connector 6 is provided on the base 14, and the latch 16 can prevent the second rotating shaft 21 from rotating when the connector 6 is located on the base 14.

When the device is not used, the connector 6 is positioned on the base 14, and the connector 6 can be fixed to a certain extent by using the base 14, so that the device is prevented from being damaged in the moving process. When the connector 6 is placed on the base 14, the retainer 16 is caught on the side of the connector 6, thereby fixing the connector 6 to the base 14. When the user need take off connector 6, only need rotate fastener 16 towards the one side of keeping away from connector 6, can take off connector 6, then the user can insert connector 6 on other equipment, when base 14 is kept away from gradually at connector 6, connect rope 17 and be pulled out, and when connector 6 inserts on other equipment, connect rope 17 because the self gravity of this device will stretch out completely, and the length of connecting rope 17 will be less than the length of connecting wire between connector 6 and this device, thereby when connecting rope 17 and tightening, the connecting wire still is in lax state, connect rope 17's use this moment, can play the effect of protection to the connecting wire, the life of connecting wire has been prolonged to a certain extent.

A first rotating shaft 18 is fixedly connected to the clamping piece 16, a free end of the first rotating shaft 18 extends into the base 14, the clamping piece 16 is of a plate-shaped structure, the clamping piece 16 can rotate around the first rotating shaft 18 in a vertical plane, a first torsion spring 19 is sleeved outside the first rotating shaft 18, and when the clamping piece 16 is in a horizontal position, the first torsion spring 19 is in a free state. When the card member 16 is stuck on the surface of the connector 6, the first torsion spring 19 is in a compressed state, and the first torsion spring 19 provides a force to the card member 16, so that the card member 16 can be stably stuck on the surface of the connector 6.

The second rotating shaft 21 is located in the base 14, the second rotating shaft 21 can freely rotate in the base 14, and a second torsion spring 22 is sleeved outside the second rotating shaft 21. The use of the second torsion spring 22 enables the connecting cord 17 to be wound around the second rotating shaft 21 when the connector 6 is positioned on the base 14.

A first limiting block 20 is fixedly connected to the first rotating shaft 18, a second limiting block 23 is fixedly connected to the second rotating shaft 21, and when the clamping piece 16 is clamped on the surface of the connector 6, the first limiting block 20 extends into the rotating track of the second limiting block 23 to prevent the second limiting block 23 from rotating. When fastener 16 is blocked on the surface of connector 6, the free end of first stopper 20 stretches into the rotation orbit of second stopper 23, if connect rope 17 and be pulled this moment, first stopper 20 will prevent second stopper 23 from rotating to prevent to connect rope 17 and continue to stretch out outwards.

A groove 15 is formed on the base 14, and when the first torsion spring 19 is in a free state, the clip 16 is positioned in the groove 15. The beginning of the recess 15 facilitates the storage of the catch 16 so that the first torsion spring 19 can push the catch 16 into the recess 15 after the connector 6 is separated from the device.

The cover plate 1 is connected with the shell 3 through a cross-shaped groove countersunk head screw.

A switch 26 for controlling the on/off of the internal circuit is arranged on the side of the housing 3 remote from the cover plate 1, and a plurality of interfaces 27 are arranged on the side of the housing 3. The switch 26 can directly control the power supply of the power supply, and the use safety performance of the product is ensured.

A magnetic clip 12 for fixing the circuit board is provided inside the housing 3.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides an EMI filter, includes shell (3) and apron (1), the rigid coupling has the circuit board on shell (3), and rigid coupling between shell (3) and apron (1), its characterized in that: a plurality of cavities are arranged in a shell (3), each cavity is separated by a partition plate (28), a circuit board is arranged in each cavity, an opening end of each cavity is sealed by a cover plate (1), a base (24) matched with the partition plates (28) is arranged on the cover plate (1), a notch (25) is formed in the base (24), when the cover plate (1) is fixedly connected with the shell (3), the free end of each partition plate (28) can be embedded into the notch (25), a connector (6), a first rectangular connector (13) and a second rectangular connector (11) are sequentially arranged on the shell (3), a base (14) used for placing the connector (6) is fixedly connected on the shell (3), one end of a connecting rope (17) is arranged on the base (14), a rotating shaft capable of rotating freely is arranged in the base (14), the connecting rope (17) is wound on the second rotating shaft (21), and the other end of the connecting rope (17) is connected to the connector (6); a clamping piece (16) used for fixing the connector (6) is arranged on the base (14), and when the connector (6) is positioned on the base (14), the clamping piece (16) can prevent the second rotating shaft (21) from rotating.

2. The EMI filter apparatus of claim 1, wherein: the clamping piece (16) is fixedly connected with a first rotating shaft (18), the free end of the first rotating shaft (18) extends into the base (14), the clamping piece (16) is of a plate-shaped structure, the clamping piece (16) can rotate around the first rotating shaft (18) in a vertical plane, a first torsion spring (19) is sleeved outside the first rotating shaft (18), and when the clamping piece (16) is located at a horizontal position, the first torsion spring (19) is located at a free state.

3. The EMI filter apparatus of claim 2, wherein: the second rotating shaft (21) is positioned in the base (14), the second rotating shaft (21) can freely rotate in the base (14), and a second torsion spring (22) is sleeved outside the second rotating shaft (21).

4. The EMI filter apparatus of claim 3, wherein: a first limiting block (20) is fixedly connected to the first rotating shaft (18), a second limiting block (23) is fixedly connected to the second rotating shaft (21), and when the clamping piece (16) is clamped on the surface of the connector (6), the first limiting block (20) extends into the rotating track of the second limiting block (23) to prevent the second limiting block (23) from rotating.

5. The EMI filter apparatus of claim 2, wherein: a groove (15) is formed in the base (14), and when the first torsion spring (19) is in a free state, the clamping piece (16) is located in the groove (15).

6. The EMI filter apparatus of claim 1, wherein: the cover plate (1) is connected with the shell (3) through a cross groove countersunk head screw.

7. The EMI filter apparatus of claim 1, wherein: a switch (26) for controlling the on-off of the internal circuit of the shell (3) is arranged on the side of the shell (3) far away from the cover plate (1), and a plurality of interfaces (27) are also arranged on the side of the shell (3).

8. The EMI filter apparatus of claim 1, wherein: a magnetic clip (12) for fixing the circuit board is arranged in the shell (3).