SMT (Surface Mount Technology) filter

Abstract

The utility model relates to the technical field of electronic components, in particular to an SMT (Surface Mount Technology) filter, which is characterized in that pin winding parts are arranged at two ends of a sleeve base, patch copper wires are wound on the pin winding parts, enameled wires are wound on the outer surface of the sleeve base and then are connected with the patch copper wires, and the surface of the sleeve base is connected with the patch copper wires. According to the SMT mounted filter, the sleeve base is arranged on the base, the shell is covered on the sleeve base so as to meet the requirement for high voltage resistance of the filter, the surface mounting equipment can suck the upper surface of the shell or clamp the side surface of the shell so as to transfer the filter, and the filter is mounted on the PCB through the outer surface of the surface mounting copper wire, namely, the SMT mounted filter is suitable for an automatic surface mounting production process; and the cost of the production process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to an SMT mounting filter. Background Art

[0002] A filter is an electrical component that reduces or eliminates the impact of harmonics on the power system. Its function is to obtain a specific frequency or eliminate a specific frequency. The anisotropic filter generally used in the electronics industry is assembled on the PCB in the form of a pin plug-in, but the structure of the pin plug-in is difficult to be assembled on the PCB; secondly, the existing filter usually uses a UL insulating sleeve to cover the component to achieve the effect of blocking the environmental voltage, but such a structure is prone to the problem of sleeve degradation or rupture, and if there is a sudden change in the environment or a strong high voltage such as a lightning strike, the UL insulating sleeve alone cannot meet the insulation requirements. Utility Model Content

[0003] In order to achieve the above-mentioned purpose, the utility model provides a SMT mounting filter, comprising:

[0004] The sleeve base has pin winding parts at both ends, patch copper wires are wound on the pin winding parts, and lead heads extend from the patch copper wires;

[0005] A magnetic core, inserted into the sleeve base;

[0006] An enameled wire is wound around the outer surface of the sleeve base, and an end of the enameled wire is connected to the patch copper wire;

[0007] The shell has an open lower end, and the shell can be covered on the sleeve base. The patch copper wire protrudes from the lower end of the shell, and the lead head can pass through the upper end of the shell.

[0008] In some possible embodiments, a side of the pin winding portion corresponding to the lower end of the housing is a plane.

[0009] In some possible embodiments, a winding groove is provided on the outer periphery of the pin winding portion, and the patch copper wire is wound on the winding groove and protrudes from the outer surface of the pin winding portion.

[0010] In some possible embodiments, at least one turn of the patch copper wire is wound on the winding groove.

[0011] In some possible embodiments, a guide groove matching the pin winding portion is provided in the housing.

[0012] In some possible embodiments, the upper end surface of the shell is a plane.

[0013] In some possible embodiments, a clearance gap is provided on the upper side of the pin winding portion for accommodating the connection between the enameled wire and the patch copper wire.

[0014] Compared with the prior art, the beneficial effect of the utility model is that: the SMT mount filter of the utility model is provided with pin winding parts at both ends of the sleeve base, the patch copper wire is wound on the pin winding parts, the enameled wire is wound on the outer surface of the sleeve base and then connected with the patch copper wire, and then the sleeve base is covered with a shell to meet the high-voltage resistance requirement of the filter, and the patch equipment can absorb the upper surface of the shell or clamp the side of the shell to transfer the filter, and mount it on the PCB through the outer surface of the patch copper wire, that is, the SMT mount filter of the utility model is suitable for automated patch assembly process, reducing the cost of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of a three-dimensional assembly of a housing and a sleeve base provided in an embodiment of the utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the SMT mounting filter provided in an embodiment of the utility model.

[0018] Reference numerals: sleeve base 10 , pin winding portion 11 , patch copper wire 12 , lead head 13 , winding groove 14 , clearance notch 15 , magnetic core 20 , enameled wire 30 , housing 40 , through hole 41 . DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Reference Figure 1 and Figure 2The SMT filter shown in the figure comprises a sleeve base 10, a magnetic core 20, an enameled wire 30 and a housing 40. The sleeve base 10 is provided with a pin winding portion 11 at both opposite ends. A patch copper wire 12 is wound on the pin winding portion 11. A lead head 13 extends from the patch copper wire 12. The magnetic core 20 is inserted into the sleeve base 10. The enameled wire 30 is wound on the outer surface of the sleeve base 10. The two ends of the enameled wire 30 are respectively connected to two The patch copper wire 12 on the pin winding part 11 is set open at the lower end of the shell 40. The shell 40 can be covered on the sleeve base 10 to cover the magnetic core 20 and the wound enameled wire 30. The patch copper wire 12 protrudes from the lower end of the shell 40 so that the patch copper wire 12 can be mounted on the PCB. The lead head 13 passes through the upper end of the shell 40 to connect to the external circuit. Specifically, the upper end of the shell 40 is provided with a through hole 41 for accommodating the lead head 13 to pass through. The SMT mounting filter of the present invention sets the patch copper wire 12 to protrude from the lower end of the shell 40 and is mounted on the PCB through the patch copper wire 12. The protrusion height of the patch copper wire 12 meets the insulation distance between the enameled wire 30 and the PCB. The shell 40 is covered on the sleeve base 10 to effectively protect the magnetic core 20 and the enameled wire 30, thereby improving the high-voltage resistance performance of the filter. Moreover, the patch equipment can realize an automated patch production process by sucking or clamping the shell 40, thereby improving production efficiency.

[0021] In some possible embodiments, the side of the pin winding portion 11 facing the lower end of the housing 40 is flat, so that the lower end of the patch copper wire 12 is horizontally arranged, increasing the contact area between the patch copper wire 12 and the PCB, so that the filter can be mounted more smoothly.

[0022] In some possible embodiments, a winding groove 14 is provided on the outer periphery of the pin winding portion 11, and the patch copper wire 12 is wound on the winding groove 14 and protrudes from the outer surface of the pin winding portion 11; if the groove depth of the winding groove 14 is smaller than the wire diameter of the patch copper wire 12, then the patch copper wire 12 can be wound around the winding groove 14 for one circle to ensure that the patch copper wire 12 protrudes from the pin winding portion 11; if the groove depth of the winding groove 14 is greater than the wire diameter of the patch copper wire 12, then at least two circles of the patch copper wire 12 can be wound to ensure that the patch copper wire 12 protrudes and can be mounted on the PCB.

[0023] In some possible embodiments, at least one turn of the patch copper wire 12 is wound on the winding groove 14 . In this embodiment, the groove width of the winding groove 14 is greater than the wire diameter of the patch copper wire 12 .

[0024] In some possible embodiments, a guide groove that cooperates with the pin winding part 11 is provided in the shell 40. During production, the enameled wire 30 is first wound on the sleeve base 10, and the patch copper wire 12 is wound on the pin winding part 11. The two ends of the enameled wire 30 are respectively connected to the two patch copper wires 12, and then the magnetic core 20 is inserted into the sleeve base 10 to assemble a filter assembly. The filter assembly is then loaded into the shell 40. When loading, the outer side surface of the pin winding part 11 and the guide groove can be used as a guide structure to ensure that the filter assembly can be smoothly and centrally loaded into the shell 40 to ensure product consistency. When in use, the shell 40 is on top to protect the filter assembly and isolate it from external high voltage.

[0025] In some possible embodiments, the upper end surface of the housing 40 is a plane, which is intended to facilitate the placement equipment to absorb the filter to improve the efficiency of the production process.

[0026] In some possible embodiments, a clearance gap 15 is opened on the upper side of the pin winding portion 11 to avoid the connection between the enameled wire 30 and the patch copper wire 12, that is, the end of the enameled wire 30 can pass through the clearance gap 15 and be welded to the patch copper wire 12.

[0027] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A SMT mounting filter, characterized in that: include: The sleeve base has pin winding parts at both ends, patch copper wires are wound on the pin winding parts, and lead heads extend from the patch copper wires; A magnetic core, inserted into the sleeve base; An enameled wire is wound around the outer surface of the sleeve base, and an end of the enameled wire is connected to the patch copper wire; The shell has an open lower end, and the shell can be covered on the sleeve base. The patch copper wire protrudes from the lower end of the shell, and the lead head can pass through the upper end of the shell.

2. The SMT mounting filter according to claim 1, characterized in that: A side of the pin winding portion corresponding to the lower end of the housing is a plane.

3. A SMT mounting filter according to claim 1 or 2, characterized in that: A winding groove is arranged on the outer periphery of the pin winding portion, and the patch copper wire is wound on the winding groove and protrudes from the outer surface of the pin winding portion.

4. The SMT mounting filter according to claim 3, characterized in that: At least one turn of the patch copper wire is wound on the winding groove.

5. The SMT mounting filter according to claim 1, characterized in that: A guide groove matched with the pin winding portion is arranged in the shell.

6. A SMT mounting filter according to claim 1 or 5, characterized in that: The upper end surface of the shell is a plane.

7. The SMT mounting filter according to claim 1, characterized in that: A clearance notch is provided on the upper side of the pin winding portion for accommodating the connection between the enameled wire and the patch copper wire.

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