Multi-inner-cavity efficient shielding filter

Abstract

The utility model discloses a multi-inner-cavity high-efficiency shielding filter, which comprises a filter shell, a cover plate and filtering assemblies, the filter shell is provided with a plurality of inner cavities, the plurality of filtering assemblies are respectively arranged in the plurality of inner cavities which are in one-to-one correspondence, the side wall of the filter shell is provided with a plurality of wire inlet through holes which are through inside and outside, and the wire inlet through holes are communicated with the cover plate. The plurality of mutually independent wire inlet through holes are respectively communicated with the plurality of inner cavities in one-to-one correspondence, and the cavity bottom of each inner cavity is provided with a wire outlet through hole which is through inside and outside. According to the utility model, the plurality of inner cavities and the plurality of mutually independent wire inlet through holes are arranged in the filter shell, so that the whole process from entering the filter shell to leading out of the filter shell after filtering of each path of signal is completed is in an independent space, and signal shielding of each path of signal can be realized in the whole process; and the risk of mutual electromagnetic interference does not exist among all paths of signals in the whole process, so that a thorough signal shielding function is realized, and the reliability of the filter in the aspect of electromagnetic compatibility is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a filter with multiple inner cavities, especially to a multi-inner cavity high -efficient shielding filter. BACKGROUND

[0002] The filter is used for effectively filtering the frequency points of specific frequency in the power line and / or signal line or the frequency outside the frequency points, and for the filter of multipurpose signal, how to solve the mutual interference problem between various signals becomes an important consideration factor.

[0003] The filter generally solves the above problem through the mode of setting multiple inner cavities, but the shielding effect between various signals of the traditional filter is not thorough enough, for example, Figure 1 As shown in a kind of traditional filter for filtering power line and signal line, including shell 2, top cover 7 and filter unit 8, three inner cavities are provided in shell 2, which are wire passing inner cavity 3, signal loop inner cavity 4 and power loop inner cavity 5, multiple inlet insulators 1 are respectively installed in the corresponding through hole on the cavity wall of wire passing inner cavity 3, multiple outlet insulators 6 are respectively installed in the bottom through hole of signal loop inner cavity 4 and the bottom through hole of power loop inner cavity 5, and the filter unit 8 in power loop inner cavity 5 is two layers;When using, signal line and power line enter wire passing inner cavity 3 through corresponding inlet insulator 1 respectively, then enter signal loop inner cavity 4 and power loop inner cavity 5 respectively, and filtered signal line and power line pass through corresponding outlet insulator 6 to the outside of shell 2.

[0004] The above traditional filter has the following defects: there is a risk of coupling and mutual interference between the wires in wire passing inner cavity 3 (including between signal line and power line, between different signal lines and between different power lines), and there is also a risk of mutual electromagnetic interference between circuits between the two layers of filter unit 8 in power loop inner cavity 5, so the signal shielding of the traditional filter is not thorough enough, and there is a problem of mutual interference between various signals. In addition, the wire inlet through hole position of the traditional filter corresponds to the inner cavity, and when the actual application needs to be connected with the wire of a specific position, it is difficult to meet the application requirements. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the above problems and provides a multi-inner cavity high -efficient shielding filter, which is more thorough in shielding between various signals.

[0006] The utility model realizes the above purpose through the following technical scheme:

[0007] The utility model provides a kind of multi-lumen high-efficiency shielding filter, including filter shell, cover plate and filter assembly, the filter assembly is placed in the inner cavity of the filter shell, the upper end of the filter shell is open end and the cover plate is installed in the open end, the inner cavity of the filter shell is multiple, multiple filter assembly is placed in one-to-one corresponding multiple inner cavity respectively, the sidewall of the filter shell is equipped with multiple wire inlet through holes that pass through inside and outside, multiple wire inlet through holes that pass through inside and outside are communicated with one-to-one corresponding multiple inner cavity respectively, the cavity bottom of each inner cavity is equipped with wire outlet through hole that passes through inside and outside.

[0008] As preferred, to facilitate the connection with other equipment and facilitate the setting of multiple inner cavities and wire inlet through holes, the outer end of multiple wire inlet through holes that pass through inside and outside parallel is located on the same sidewall outer surface of the filter shell, multiple inner cavities are sequentially distributed in the axial direction of wire inlet through hole, the cavity bottom surface of the inner cavity farthest from the outer end of wire inlet through hole is plane and the cavity bottom surface of all other inner cavities is equipped with boss for setting wire inlet through hole and upwardly protruding.

[0009] As preferred, to facilitate the butt joint with cable on specific position of other equipment, the sidewall outer surface of the filter shell corresponding to the outer end of wire inlet through hole is equipped with side plate mortise, the outer end of all wire inlet through holes is located in the area of side plate mortise, wire inlet side plate is installed in the side plate mortise, the wire inlet side plate is equipped with multiple side plate through holes corresponding to multiple wire inlet through holes, the groove bottom surface of the side plate mortise is equipped with multiple wire guide mortises, one end of each wire guide mortise is communicated with the outer end of one wire inlet through hole and the other end is communicated with one side plate through hole.

[0010] As preferred, to realize better signal shielding function, each wire guide mortise is equipped with one annular groove in the groove wall close to opening position and the corresponding shape side part conductive rubber ring is installed in the annular groove, and the side part conductive rubber ring is in close contact with the wire inlet side plate.

[0011] As preferred, to facilitate better grounding of the shielding net of wire inlet end cable, the outer end of each side plate through hole is equipped with shrinkage interface.

[0012] As preferred, to realize better signal shielding function, the upper end cavity wall of each inner cavity is equipped with annular groove and upper part conductive rubber ring is arranged in the annular groove, and the upper part conductive rubber ring is in close contact with the cover plate.

[0013] As preferred, to facilitate quick installation of filter assembly, the upper end of each filter assembly is installed in the lower surface of the cover plate and located in the corresponding upper part conductive rubber ring.

[0014] As preferred, in order to realize better insulation function between the wires and the filter shell, an insulator is installed in each of the incoming wire through hole and the outgoing wire through hole.

[0015] The utility model discloses the beneficial effect lies in:

[0016] The utility model discloses a plurality of inner cavities and a plurality of independent incoming wire through holes are arranged in the filter shell, and the filter assembly is installed in each inner cavity, so that the whole process of each signal from entering the filter shell to being led out from the filter shell after filtering is in the independent space, the signal shielding can be realized between each signal, and the risk of mutual electromagnetic interference between each signal is avoided, so that the signal shielding function is realized completely, and the reliability of the filter in electromagnetic compatibility is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a kind of traditional filter assembly before stereogram;

[0018] Figure 2 It is the utility model described before the stereogram of the multiple inner cavity high efficiency shielding filter assembly;

[0019] Figure 3 It is the stereogram of the filter shell of the multiple inner cavity high efficiency shielding filter of the utility model;

[0020] Figure 4 It is the filter shell of the multiple inner cavity high efficiency shielding filter of the utility model, and the overhead section view of the filter shell is located in the vertical region of incoming wire through hole. DETAILED DESCRIPTION

[0021] The utility model will be further described in connection with the drawings:

[0022] As Figures 2-4 The utility model discloses multiple inner cavity high efficiency shielding filter includes filter shell 14, cover plate 19 and filter assembly 20, filter assembly 20 is placed in the inner cavity 16 of filter shell 14, and the upper end of filter shell 14 is open end and cover plate 19 is installed on the open end, and the inner cavity 16 of filter shell 14 is multiple, and multiple filter assemblies 20 are placed in one-to-one corresponding multiple inner cavities 16, and the sidewall of filter shell 14 is equipped with multiple incoming wire through holes 13 that pass through inside and outside, and multiple independent incoming wire through holes 13 are communicated with one-to-one corresponding multiple inner cavities 16 respectively, and the cavity bottom of each inner cavity 16 is equipped with outgoing wire through hole 22 that passes through inside and outside.

[0023] As Figures 2-4 The utility model discloses multiple inner cavity high efficiency shielding filter includes filter shell 14, cover plate 19 and filter assembly 20, filter assembly 20 is placed in the inner cavity 16 of filter shell 14, and the upper end of filter shell 14 is open end and cover plate 19 is installed on the open end, and the inner cavity 16 of filter shell 14 is multiple, and multiple filter assemblies 20 are placed in one-to-one corresponding multiple inner cavities 16, and the sidewall of filter shell 14 is equipped with multiple incoming wire through holes 13 that pass through inside and outside, and multiple independent incoming wire through holes 13 are communicated with one-to-one corresponding multiple inner cavities 16 respectively, and the cavity bottom of each inner cavity 16 is equipped with outgoing wire through hole 22 that passes through inside and outside.

[0024] In order to facilitate the connection with other devices and facilitate the setting of multiple inner cavities 16 and lead-in through holes 13, the outer ends of the multiple parallel lead-in through holes 13 are located on the same side wall outer surface of the filter housing 14, the multiple inner cavities 16 are distributed in sequence in the axial direction of the lead-in through holes 13, and the cavity bottom surface of the inner cavity 16 farthest from the outer end of the lead-in through hole 13 is a plane and the cavity bottom surface of all other inner cavities 16 is provided with a boss 21 for setting the lead-in through hole 13 and protruding upward.

[0025] In order to facilitate the connection with other devices and facilitate the setting of multiple inner cavities 16 and lead-in through holes 13, the outer ends of the multiple parallel lead-in through holes 13 are located on the same side wall outer surface of the filter housing 14, the multiple inner cavities 16 are distributed in sequence in the axial direction of the lead-in through holes 13, and the cavity bottom surface of the inner cavity 16 farthest from the outer end of the lead-in through hole 13 is a plane and the cavity bottom surface of all other inner cavities 16 is provided with a boss 21 for setting the lead-in through hole 13 and protruding upward.

[0026] In order to achieve better signal shielding function, each wire guide groove 15 is provided with a corresponding annular groove (not labeled in the figure) in the groove wall near the opening position, and a corresponding shape of side conductive rubber ring 11 is installed in the annular groove, and the side conductive rubber ring 11 is in close contact with the lead-in side plate 9.

[0027] In order to facilitate the better grounding of the shielding net of the lead-in end cable, a shrinkage interface 10 is installed at the outer end of each side plate through hole, and the shrinkage interface 10 here is a kind of elastic interface, that is, a sleeve provided with multiple circumferentially distributed opening grooves.

[0028] In order to achieve better signal shielding function, each inner cavity 16 is provided with an annular groove 17 at the upper end of the cavity wall, and an upper conductive rubber ring 18 is arranged in the annular groove 17, and the upper conductive rubber ring 18 is in close contact with the cover plate 19.

[0029] In order to facilitate the quick installation of the filter assembly 20, the upper end of each filter assembly 20 is installed below the cover plate 19 and located in the corresponding upper conductive rubber ring 18.

[0030] In order to achieve better insulation function between the wire and the filter housing 14, an insulator 12 is installed in each lead-in through hole 13 and lead-out through hole 22.

[0031] As Figures 2-4As shown, when applied, a plurality of cables (not shown in the figure, which can be signal lines and / or power lines) to be filtered are respectively threaded through the corresponding shrink interfaces 10, the shielding mesh of the cables is in close contact with the shrink interfaces 10, the conductive wires of the cables are turned through the wire grooves 15 (positions corresponding to which do not need to pass through the wire grooves 15) and then pass through the insulators 12 in the corresponding wire entry through holes 13, enter the corresponding inner cavities 16 after passing through the corresponding wire entry through holes 13, and are connected with the input ends of the corresponding filter assemblies 20, the output ends of the filter assemblies 20 are connected with output wires (not shown in the figure), the output wires pass through the insulators 12 in the corresponding wire exit through holes 22 and are connected with other devices correspondingly. The signal channel and the filtering process of each cable are completely closed, so that electromagnetic interference does not occur between signals, and complete signal shielding function is achieved.

[0032] The above embodiments are only preferred embodiments of the present application, and are not a limitation on the technical solutions of the present application. Any technical solution that can be realized on the basis of the above embodiments without creative labor should be considered to fall within the protection scope of the patent of the present application.

Claims

1. A multiple inner cavity high efficiency shielded filter comprising a filter housing, a cover plate and a filter assembly, said filter assembly being disposed within an inner cavity of said filter housing, an upper end of said filter housing being open ended and said cover plate being mounted to the open end, characterized in that: The filter housing has multiple cavities, and the multiple filter components are respectively placed in the multiple corresponding cavities. The side wall of the filter housing is provided with multiple through holes that are connected to the inside and outside. The multiple independent through holes are respectively connected to the multiple corresponding cavities. The bottom of each cavity is provided with an outlet hole that is connected to the inside and outside.

2. The multi-lumen high efficiency shielded filter of claim 1, wherein: The outer ends of the multiple parallel inlet holes are located on the same outer surface of the side wall of the filter housing. The multiple inner cavities are distributed sequentially along the axial direction of the inlet holes. The bottom surface of the inner cavity farthest from the outer end of the inlet hole is flat, and the bottom surfaces of all other inner cavities are provided with a boss for setting the inlet hole and protruding upward.

3. The multi-lumen high efficiency shielded filter of claim 2, wherein: The filter housing has a side plate groove on the outer surface of the side wall corresponding to the outer end of the inlet through hole. The outer ends of all the inlet through holes are located in the area of ​​the side plate groove. The inlet side plate is installed in the side plate groove. The inlet side plate has multiple side plate through holes that correspond one-to-one with the multiple inlet through holes. The bottom surface of the side plate groove has multiple wire grooves. One end of each wire groove is connected to the outer end of one of the inlet through holes, and the other end is connected to one of the side plate through holes.

4. The multi-lumen high efficiency shielded filter of claim 3, wherein: Each of the wire sinks has an annular groove near the opening in its wall, and a correspondingly shaped side conductive rubber ring is installed in the annular groove. The side conductive rubber ring is in close contact with the inlet side plate.

5. The multi-lumen high efficiency shielded filter of claim 3, wherein: A shrink-fit connector is installed at the outer end of each of the side plate through holes.

6. The multi-lumen high efficiency shielded filter of any of claims 1-5, wherein: Each of the inner cavities has an annular groove on its upper cavity wall and an upper conductive rubber ring is provided in the annular groove, the upper conductive rubber ring being in close contact with the cover plate.

7. The multi-lumen high efficiency shielded filter of claim 6, wherein: The upper end of each of the filter components is mounted under the cover plate and located inside the corresponding upper conductive rubber ring.

8. The multi-lumen, high- efficiency, shielded filter of any of claims 1-5, wherein: An insulator is installed in each of the inlet and outlet through holes.

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