Common-mode filter capable of adaptively suppressing common-mode noise

Abstract

The utility model discloses a common-mode filter capable of adaptively inhibiting common-mode noise, which comprises a shell, a filter main body is arranged in the shell, a wiring terminal is arranged on the shell and penetrates through the shell, an insulating layer is filled between the wiring terminal and the shell, and the wiring terminal is connected with the filter main body; the housing is made of a metal material, and the outer layer of the housing is coated with a shielding layer. The filter main body and related circuits are completely sealed in the shell made of the metal material, the shell made of the metal material has good shielding capability, so that the interference of an external electromagnetic field can be effectively blocked, and the shielding layer is coated on the outer layer of the shell, so that the anti-interference capability of the shell is further enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field, concretely is a common mode filter of adaptive suppression common mode noise. BACKGROUND

[0002] Common mode filter usually adopts ferrite core, double line parallel winding. Low differential mode noise signal inhibits interference source, is difficult to deform in high speed signal. Noise suppression countermeasure is good, high common mode noise suppression and low differential mode noise signal suppression.

[0003] The existing common mode filter is susceptible to external electromagnetic field interference in the use process, and the filtering effect of the common mode filter is affected. UTILITY MODEL CONTENT

[0004] The utility model provides a common mode filter of adaptive suppression common mode noise to solve the problem in the background art.

[0005] In order to realize above object, the utility model is realized through following technical scheme:

[0006] A common mode filter of adaptive suppression common mode noise, including the casing, be provided with filter main part in the casing, be provided with binding post on the casing, the binding post is through casing, the binding post is filled with insulating layer between casing, the binding post is connected with filter main part;

[0007] The casing is made of metal material, and the outer layer of the casing is coated with a shielding layer.

[0008] Preferably, the filter main part includes a mounting bracket fixedly connected to the inside of the casing, a fixed terminal provided on the mounting bracket, an air slot provided at the center of the mounting bracket, a magnetic core provided in the air slot, and a winding symmetrically wound on the magnetic core, the end of the winding being connected to the fixed terminal.

[0009] Preferably, the fixed terminal is connected to one end of the binding post in the casing.

[0010] Preferably, the casing includes a bottom shell, a top cover provided on the upper end of the bottom shell, the top cover being rotatably connected to the upper end of the bottom shell through a connecting piece, and a closure provided on the top cover and the upper end of the bottom shell away from the connecting piece.

[0011] Preferably, the connecting piece is a hinge.

[0012] Preferably, the closure piece comprises an L-shaped fixing block fixedly connected to one side of the bottom shell away from the connecting piece, the L-shaped fixing block is slidingly connected with a limiting slide shaft, one end of the limiting slide shaft close to the bottom shell is fixedly connected with a first clamping plate, a spring is arranged between the first clamping plate and the L-shaped fixing block, the spring is sleeved on the limiting slide shaft, and the two ends of the spring abut against the first clamping plate and the L-shaped fixing block respectively.

[0013] Preferably, the closure piece comprises a second clamping plate fixedly connected to one side of the terminal away from the connecting piece, and the second clamping plate and the first clamping plate can be clamped.

[0014] Preferably, a sealing piece is arranged between the upper end of the bottom shell and the top cover, and the sealing piece is clamped in a "convex" groove arranged at the upper end of the shell.

[0015] Preferably, the sealing piece comprises a fixing strip, an elastic sheet is fixedly connected in the fixing strip, a plurality of installation hollow pipes are arranged on the lower surface of the fixing strip, the installation hollow pipes are made of elastic material, clamping protrusions are arranged on the two sides of the installation hollow pipes, the two ends of the elastic sheet are penetrated through the fixing strip and connected to the clamping protrusions, and the clamping protrusions are clamped in the "convex" groove at the upper end of the shell.

[0016] Preferably, an elastic strip in a hollow tubular structure is arranged on the upper surface of the fixing strip, and a friction sealing strip is arranged on the upper side of the elastic strip.

[0017] Compared with the prior art, the utility model at least has the following beneficial effects:

[0018] The filter main body and the related circuit are completely enclosed in the shell made of metal material, the shell made of metal material has good shielding capacity, can effectively block the interference of external electromagnetic field, and the shell is coated with a shielding layer, and the anti-interference capacity of the shell is further enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a main body structure schematic view of the utility model;

[0020] Figure 2 It is a filter main body structure schematic view of the utility model;

[0021] Figure 3 It is a shell structure schematic view of the utility model;

[0022] Figure 4 It is a closure piece structure schematic view of the utility model;

[0023] Figure 5 It is a sealing piece structure sectional view schematic view of the utility model.

[0024] In the figure: 1, the shell; 2, filter body; 3, terminal; 11, bottom shell; 12, connecting piece; 13, top cover; 14, closure; 15, sealing element; 21, mounting bracket; 22, fixed terminal; 23, empty slot; 24, magnetic core; 25, winding; 141, L-shaped fixed block; 142, limit sliding shaft; 143, spring; 144, first clamping plate; 145, second clamping plate; 151, fixed strip; 152, elastic strip; 153, friction sealing strip; 154, installation empty pipe; 155, elastic sheet; 156, clamping protrusion. DETAILED DESCRIPTION

[0025] In the present application, the description of "first", "second" and the like is only for the purpose of description, and does not mean to particularly indicate the order or sequence, nor to limit the present application, which is merely to distinguish the protective assembly or operation described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features of each embodiment can be combined with each other, but must be based on the realization of ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0026] Embodiment 1

[0027] Please refer to Figure 1 A common mode filter for self-adaptive common mode noise suppression, comprising a shell 1, a filter body 2 is arranged in the shell 1, a terminal 3 is arranged on the shell 1, the terminal 3 penetrates the shell 1, an insulating layer is filled between the terminal 3 and the shell 1, and the terminal 3 is connected with the filter body 2.

[0028] The shell 1 is made of metal material, and a shielding layer is coated on the outer layer of the shell 1.

[0029] The working principle and beneficial effects of the above scheme are as follows:

[0030] The filter body 2 and the related circuit are completely enclosed in the shell 1 made of metal material, the shell 1 made of metal material has good shielding ability, can effectively block the interference of external electromagnetic field, and the shell 1 is coated with a shielding layer on the outer layer, further enhancing the anti-interference ability of the shell 1.

[0031] Embodiment 2

[0032] Please refer to Figure 2On the basis of embodiment 1, the filter main body 2 comprises a mounting frame 21 fixedly connected in the shell 1, a fixed terminal 22 is arranged on the mounting frame 21, a hollow slot 23 is arranged at the center of the mounting frame 21, a magnetic core 24 is arranged in the hollow slot 23, and a winding 25 is symmetrically wound on the magnetic core 24, and the end of the winding 25 is connected with the fixed terminal 22.

[0033] The fixed terminal 22 is connected with the terminal 3 at one end in the shell 1.

[0034] The working principle and beneficial effects of the above scheme are as follows:

[0035] The mounting frame 21 is fixed with the shell 1, which ensures the stability of the filter and guarantees the filtering effect of the filter, and the fixed terminal 22 is connected with the terminal 3, which guarantees the anti-interference effect of the filter.

[0036] Embodiment 3

[0037] Please refer to Figure 3 、 4 On the basis of embodiment 1, the shell 1 comprises a bottom shell 11, a top cover 13 is arranged at the upper end of the bottom shell 11, the top cover 13 is rotationally connected to the upper end of the bottom shell 11 through a connecting piece 12, and a closing piece 14 is arranged on the side of the upper end of the bottom shell 11 away from the connecting piece 12 and the top cover 13.

[0038] The connecting piece 12 is a hinge.

[0039] The closing piece 14 comprises an L-shaped fixed block 141 fixedly connected to the side of the upper end of the bottom shell 11 away from the connecting piece 12, a limiting sliding shaft 142 slidingly connected to the L-shaped fixed block 141, a first clamping plate 144 fixedly connected to one end of the limiting sliding shaft 142 close to the bottom shell 11, a spring 143 arranged between the first clamping plate 144 and the L-shaped fixed block 141, the spring 143 being sleeved on the limiting sliding shaft 142, and the two ends of the spring 143 abutting against the first clamping plate 144 and the L-shaped fixed block 141, respectively.

[0040] The closing piece 14 comprises a second clamping plate 145 fixedly connected to the side of the terminal 3 away from the connecting piece 12, and the second clamping plate 145 and the first clamping plate 144 can be clamped.

[0041] The working principle and beneficial effects of the above scheme are as follows:

[0042] The shell 1 can be opened and closed through the connection of the bottom shell 11 and the top cover 13, which facilitates the replacement of the filter main body 2 and can also adapt to different filter main bodies 2.

[0043] When the shell 1 is closed, the top cover 13 is attached to the upper end of the bottom shell 11, the second clamping plate 145 extrudes the first clamping plate 144, so that the first clamping plate 144 extrudes the spring 143, the spring 143 is contracted, the second clamping plate 145 is lowered to between the first clamping plate 144 and the bottom shell 11, the first clamping plate 144 and the second clamping plate 145 can be fully clamped, which ensures the firm connection of the bottom shell 11 and the top cover 13.

[0044] Embodiment 4

[0045] Please refer to Figure 5 On the basis of embodiment 1, a sealing element 15 is arranged between the upper end of the bottom shell 11 and the top cover 13, and the sealing element 15 is clamped in the "convex" groove arranged at the upper end of the shell 1.

[0046] The surface of the sealing element 15 is coated with a shielding layer;

[0047] The sealing element 15 comprises a fixed strip 151, an elastic sheet 155 is fixedly connected in the fixed strip 151, a plurality of installation hollow tubes 154 are arranged on the lower surface of the fixed strip 151, the installation hollow tubes 154 are made of elastic material, clamping protrusions 156 are arranged on the two sides of the installation hollow tubes 154, the elastic sheet 155 is penetrated through the fixed strip 151 and connected to the clamping protrusions 156 at the two ends, and the clamping protrusions 156 are clamped in the "convex" groove arranged at the upper end of the shell 1.

[0048] A elastic strip 152 is arranged on the upper surface of the fixed strip 151, the elastic strip 152 has a hollow tubular structure, and a friction sealing strip 153 is arranged on the upper side of the elastic strip 152.

[0049] The working principle and beneficial effects of the above scheme are as follows:

[0050] In order to ensure that there is no gap between the bottom shell 11 and the top cover 13 and that they can be closely attached, a hollow tubular structure elastic strip 152 is arranged, when the shell 1 is closed, the top cover 13 extrudes the friction sealing strip 153, the friction sealing strip 153 extrudes the elastic strip 152, the elastic strip 152 deforms, fills the gap between the bottom shell 11 and the top cover 13, enhances the sealing effect between the bottom shell 11 and the top cover 13, and ensures the anti-interference ability of the shell 1.

[0051] The sealing element 15 is clamped in the "convex" groove arranged at the upper end of the shell 1, which is convenient for replacement, and after the sealing element 15 is aged, replacing the sealing element 15 can prolong the service life of the shell 1 and ensure the anti-interference effect.

[0052] When the sealing element 15 is installed, the installation hollow tubes 154 on the two sides are compressed, the installation hollow tubes 154 extrude the elastic sheet 155 to deform, after the clamping protrusions 156 are clamped in the "convex" groove, the pressure disappears, and the elastic sheet 155 rebounds under the action of the elastic sheet 155 to complete the installation.

[0053] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the application can be implemented in other particular forms without departing from the spirit or essential characteristics of the application. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No feature of the application is considered critical unless it is expressly stated in the claims.

Claims

1. A common-mode filter that adaptively suppresses common-mode noise, characterized in that, Includes a housing (1), a filter body (2) is disposed inside the housing (1), a wiring terminal (3) is disposed on the housing (1), the wiring terminal (3) penetrates the housing (1), an insulating layer is filled between the wiring terminal (3) and the housing (1), and the wiring terminal (3) is connected to the filter body (2); The housing (1) is made of metal material and the outer layer of the housing (1) is coated with a shielding layer.

2. The common-mode filter for adaptive common-mode noise suppression according to claim 1, characterized in that, The filter body (2) includes a mounting frame (21), which is fixedly connected to the housing (1). A fixed terminal (22) is provided on the mounting frame (21). A slot (23) is provided at the center of the mounting frame (21). A magnetic core (24) is provided in the slot (23). A winding (25) is symmetrically wound on the magnetic core (24). The end of the winding (25) is connected to the fixed terminal (22).

3. The common-mode filter for adaptive common-mode noise suppression according to claim 2, characterized in that, The fixed terminal (22) is connected to the end of the wiring terminal (3) located inside the housing (1).

4. The common-mode filter for adaptive common-mode noise suppression according to claim 1, characterized in that, The housing (1) includes a bottom shell (11), and a top cover (13) is provided on the upper end of the bottom shell (11). The top cover (13) is rotatably connected to the upper end of the bottom shell (11) through a connector (12). A closing member (14) is provided between the upper end of the bottom shell (11) away from the connector (12) and the top cover (13).

5. A common-mode filter for adaptive common-mode noise suppression according to claim 4, characterized in that, The connector (12) is a hinge.

6. A common-mode filter for adaptive common-mode noise suppression according to claim 4, characterized in that, The closing member (14) includes an L-shaped fixing block (141), which is fixedly connected to the upper end of the bottom shell (11) away from the connecting member (12). The L-shaped fixing block (141) is slidably connected to a limiting slide shaft (142). A first locking plate (144) is fixedly connected to one end of the limiting slide shaft (142) near the bottom shell (11). A spring (143) is provided between the first locking plate (144) and the L-shaped fixing block (141). The spring (143) is sleeved on the limiting slide shaft (142), and both ends of the spring (143) abut against the first locking plate (144) and the L-shaped fixing block (141) respectively.

7. A common-mode filter for adaptive common-mode noise suppression according to claim 6, characterized in that, The closure (14) includes a second locking plate (145), which is fixedly connected to the side of the terminal block (3) away from the connector (12), and the second locking plate (145) can be engaged with the first locking plate (144).

8. A common-mode filter for adaptive common-mode noise suppression according to claim 4, characterized in that, A sealing element (15) is provided between the upper end of the bottom shell (11) and the top cover (13), and the sealing element (15) is snapped into the "convex" groove provided at the upper end of the shell (1).

9. A common-mode filter for adaptive common-mode noise suppression according to claim 8, characterized in that, The sealing element (15) includes a fixing strip (151), an elastic sheet (155) is fixedly connected inside the fixing strip (151), and a number of installation tubes (154) are provided on the lower surface of the fixing strip (151). The installation tubes (154) are made of elastic material, and locking protrusions (156) are provided on both sides of the installation tubes (154). The two ends of the elastic sheet (155) pass through the fixing strip (151) and are connected to the locking protrusions (156). The locking protrusions (156) are engaged in the "convex" groove at the upper end of the housing (1).

10. A common-mode filter for adaptive common-mode noise suppression according to claim 9, characterized in that, An elastic strip (152) is provided on the upper surface of the fixing strip (151). The elastic strip (152) has a hollow tubular structure, and a friction sealing strip (153) is provided on the upper side of the elastic strip (152).

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