Shielding shell for filter

Abstract

The utility model discloses a shielding shell for a filter, which comprises a base, a shell and a plurality of binding post assemblies, and the base and the shell are made of plastic materials and are respectively formed by injection molding; the binding post assemblies are installed on the left side and the right side of the shell, a plurality of metal fins are integrally poured on the front side and the rear side of the shell, and the metal fins are embedded into the shell from the outside and flush with the inner wall of the shell. All the surfaces of the shell and the upper surface of the base are electroplated with metal shielding layers; and the base and the shell are bonded by a conductive sealant. According to the utility model, the plastic shell is adopted, the cost and the weight can be reduced, all the surfaces of the shell and the upper surface of the base are electroplated with the metal shielding layers, and the base and the shell are bonded through the conductive sealant, so that a closed shielding cover is formed; in consideration of low heat dissipation efficiency of plastic, the metal fin shell is embedded into the shell from the outside and is flush with the inner wall of the shell, and the metal fins are connected with the metal shielding layers on the inner side and the outer side, so that electromagnetic leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic component technical field, especially a shielding shell for filter. BACKGROUND

[0002] The filter is a filter circuit composed of a capacitor, an inductor and a resistor.

[0003] The existence of the inductor and the resistor makes the inductor more sensitive to external electromagnetic, so that the filter with high precision needs to consider electromagnetic shielding, and currently a metal shell is generally used, which has high cost and large processing difficulty, and further has increased weight. SUMMARY

[0004] The utility model provides a shielding shell for filter with low cost, easy processing, light weight and good electromagnetic shielding capacity.

[0005] The technical scheme of the utility model is as follows:

[0006] A shielding shell for filter, comprising a base, a shell and a plurality of terminal post assemblies, the base and the shell are both plastic materials and are respectively injection molded; the shell is provided with terminal post assemblies on the left and right sides, and a plurality of metal fins are integrally cast on the front and back sides; the metal fins are embedded in the shell from the outside and are flush with the inner wall of the shell; all surfaces of the shell and the upper surface of the base are plated with a metal shielding layer; the base and the shell are bonded with conductive sealant.

[0007] Further, the base is provided with ear plates with screw holes on both sides, and the ear plate positions are not plated with a metal shielding layer.

[0008] Further, the base is provided with a snap ring matched with the inner side contour of the bottom of the shell, and the surface of the snap ring is plated with a metal shielding layer; the shell is clamped on the snap ring and is bonded with conductive sealant.

[0009] Further, the base and the shell are made of one of polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS) or thermoplastic polyester (PBT).

[0010] Further, the metal shielding layer is made of copper or silver.

[0011] Further, the terminal post assembly comprises an insulating post and a conductive post penetratingly injection molded in the insulating post, an installation ring and a positioning ring A are sequentially arranged at an outer end of the insulating post, and a positioning ring B is arranged at an inner end of the insulating post, wherein a metal shielding layer is electroplated on the rest of the outer periphery of the insulating post except the end surface and the peripheral surface of the positioning ring A and the positioning ring B; the installation ring has a diameter greater than that of the insulating post, and the positioning ring A and the positioning ring B have diameters smaller than that of the insulating post.

[0012] The utility model has the advantages of:

[0013] The utility model discloses a plastic shell can reduce the cost of material and manufacturing cost, can adopt injection molding process production, in order to solve the electromagnetic shielding problem, all surfaces of the shell and the upper surface of the base are electroplated with a metal shielding layer; the base and the shell are bonded with conductive sealant, thereby forming a sealed shield, the lower surface of the base and the periphery are not electroplated, facilitating insulation with the circuit board, considering that the heat dissipation efficiency of plastic is relatively low, the metal fin shell is embedded in the shell from the outside, and is flush with the inner wall of the shell, the metal fin and the metal shielding layer on the inner and outer sides are connected, and electromagnetic leakage is not caused. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a three-dimensional structure schematic view of the utility model;

[0015] Fig. 2 It is a sectional view of the utility model;

[0016] Fig. 3 It is a terminal post assembly structure schematic view.

[0017] In the drawing: 1-base, 11-ear plate, 12-screw hole, 13-clasp, 2-shell, 3-metal fin, 4-terminal post assembly, 41-insulating post, 411-installation ring, 412-positioning ring A, 413-positioning ring B, 42-conductive post. DETAILED DESCRIPTION

[0018] The specific embodiments of the utility model will be further described below in combination with the drawings. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation on the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] As Figs. 1-3 shown:

[0020] A kind of shielding shell for filter, including base 1, shell 2 and several terminal post assemblies, the base 1 and shell 2 are both plastic material, are injection molded respectively;The left and right sides of shell 2 install terminal post assembly, and several metal fins 3 are integrally cast on the front and back sides, the metal fin 3 is embedded from outside into shell 2, and is flush with the inner wall of shell 2;All surfaces of shell 2 and the upper surface of base 1 are electroplated with metal shielding layer (thin layer, not shown, but this does not affect the understanding and implementation of the present technical solution);Base 1 and shell 2 are bonded with conductive sealant.

[0021] The utility model discloses a plastic shell 2 can reduce the cost of material and manufacturing cost, can adopt injection molding process production, in order to solve the electromagnetic shielding problem, all surfaces of shell 2 and the upper surface of base 1 are electroplated with metal shielding layer, recommend electroplating copper or silver, both have relatively good electromagnetic shielding effect.

[0022] Base 1 and shell 2 are bonded with conductive sealant, thereby forming a closed shield, the lower surface of base 1 and the periphery are not electroplated, facilitating insulation with circuit board, considering that the heat dissipation efficiency of plastic is lower, metal fin 3 shell 2 is embedded from outside into shell 2, and is flush with the inner wall of shell 2, the metal fin 3 and the metal shielding layer on the inner and outer sides are connected, and electromagnetic leakage is not caused.

[0023] In order to reduce the electromagnetic leakage of terminal post assembly, the terminal post assembly includes an insulating column 41 and a conductive column 42 penetratingly injection molded in the insulating column 41, an installation ring 411 and an installation ring 412 are sequentially arranged at the outer end of the insulating column 41, and a positioning ring B 413 is arranged at the inner end, wherein the outer periphery of the insulating column 41 is electroplated with a metal shielding layer except the end surface and the peripheral surface of the installation ring 412 and the positioning ring B 413; the diameter of the installation ring 411 is greater than that of the insulating column 41, and the diameters of the installation ring 412 and the positioning ring B 413 are less than that of the insulating column 41. The installation ring 411 is arranged to facilitate bonding with the shell 2 by using conductive sealant, and the installation ring 412 and the positioning ring B 413 serve the purpose of insulation and are not electroplated with the metal shielding layer.

[0024] In order to enhance the mounting stability of the base 1 and the shell 2, a snap ring 13 matched with the inner side contour of the bottom of the shell 2 is arranged on the base 1, and the surface of the snap ring 13 is electroplated with a metal shielding layer; the shell 2 is clamped on the snap ring 13 and bonded with conductive sealant.

[0025] As for the mounting of the base 1 on the circuit board, a bolt or the like structure can be used, and an ear plate 11 with a threaded hole 12 is symmetrically arranged on both sides of the base 1, and the ear plate 11 is not electroplated with a metal shielding layer, thereby serving the purpose of insulation with the bolt.

[0026] As for the material of the base 1 and the shell 2, one of polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS) or thermoplastic polyester (PBT) can be adopted, which are common electrical engineering plastics.

[0027] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications are made to these embodiments without departing from the principles and spirits of the utility model, and still fall within the protection scope of the utility model.

Claims

1. A shield case for a filter, characterized by: The utility model relates to a kind of electric junction box, including base, shell and several terminal post assemblies, the base and shell are plastic material, respectively injection molded;The left and right sides of the shell are installed terminal post assembly, and several metal fins are integrally cast in front and back side, the metal fin is embedded in shell from outside, and is flush with shell inner wall;All surfaces of shell and the upper surface of base are plated metal shielding layer;Base and shell are bonded using conductive sealant.

2. The shield case for a filter according to claim 1, characterized by: The both sides of the base are symmetrically provided with lug plates with screw holes, and the lug plate positions are not plated with metal shielding layer.

3. The shield case for a filter according to claim 1, characterized by: The base is provided with snap ring matching the profile of the inner side of the bottom of the shell, and the surface of the snap ring is plated with metal shielding layer; the shell is clamped on the snap ring and bonded using conductive sealant.

4. The shield case for a filter according to Claim 1, wherein: The base and the shell are made of one of polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS) or thermoplastic polyester (PBT).

5. The shield case for a filter according to Claim 1, wherein: The metal shielding layer is made of copper or silver.

6. The shield case for a filter according to any one of claims 1 to 5, characterized by: The terminal post assembly comprises an insulating post and a conductive post penetratingly injection molded in the insulating post, and the outer end of the insulating post is sequentially provided with a mounting ring and a positioning ring A, and the inner end is provided with a positioning ring B, wherein the outer periphery of the insulating post is plated with metal shielding layer except the end surface and the peripheral surface of the positioning ring A and the positioning ring B; the diameter of the mounting ring is greater than that of the insulating post, and the diameters of the positioning ring A and the positioning ring B are smaller than that of the insulating post.

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