Closed-loop current sensor magnetic shielding installation structure

Abstract

The utility model belongs to the technical field of current sensor mounting structures, and particularly relates to a closed-loop current sensor magnetic shielding mounting structure, which comprises a shell, a shielding box, a PCB (printed circuit board) and a magnetic core assembly, the PCB and the shielding box are mounted in the shell, the shielding box is connected with the PCB, the PCB is clamped and fixed in the shell, the magnetic core assembly is mounted in the shielding box, and the magnetic core assembly is connected with the shielding box. The electromagnetic shielding effect is improved through the arranged shielding box, meanwhile, the shielding box is fixedly connected with the PCB, and the installation mode is simple.

Description

Technical Field

[0001] The utility model belongs to the technical field of current sensor installation structures, in particular to a magnetic shielding installation structure of a closed-loop current sensor. Background Art

[0002] A closed-loop current sensor is a sensor used to measure current. Its working principle is based on a closed-loop feedback system. It adjusts the output in real time to ensure that the measured value is consistent with the expected value. The closed-loop current sensor first measures by sensing or sampling the current. Commonly used sensor elements include Hall effect sensors or current transformers. These sensors convert the current into a voltage or current signal.

[0003] At present, the minimum closed-loop current sensor products are basically 3A. If it is below 3A, the geomagnetic field has a great influence on the zero point of the sensor, and the product performance parameters are likely to fail to meet the standards. The previous shielding method uses an upper shielding sheet and a lower shielding sheet to fully surround the sensor. The installation requires two steps and two molds are required for mold opening. The installation process is relatively complicated, and the mold opening cost and product cost are high. In addition, the products produced usually require glue to fix the position of the shielding sheet. The process is complicated, so a closed-loop current sensor magnetic shielding installation structure that is easy to install and has good electromagnetic shielding effect is needed. Utility Model Content

[0004] In view of the above problems, the utility model proposes a magnetic shielding installation structure for a closed-loop current sensor, which effectively solves the problem in the prior art that the training station cannot flexibly cope with the switching between simple and complex training projects.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a closed-loop current sensor magnetic shielding installation structure, including a shell, a shielding box, a PCB board and a magnetic core assembly, the PCB board and the shielding box are installed in the shell and the shielding box is connected to the PCB board, the PCB board is clamped and fixed in the shell, and the magnetic core assembly is installed in the shielding box. The electromagnetic shielding effect is improved by the set shielding box, and the shielding box is fixedly connected to the PCB board, and the installation method is simple.

[0006] Furthermore, the shell includes a box body and a box cover snap-connected to the upper side of the box body.

[0007] Furthermore, two opposite inner side surfaces of the box body are provided with card slots, and the PCB board is carded in the card slots.

[0008] Furthermore, a pin groove is provided on the side of the box body, and the PCB board includes a board body and connecting pins located on the board body, and the connecting pins extend to the outside of the box body through the pin groove.

[0009] Furthermore, a support platform is provided at the bottom of the inner side surface of the box body, and the shielding box is located on the support platform.

[0010] Furthermore, the shielding box includes a bottom film, a shielding baffle disposed around the outer side of the bottom film, and welding pins connected to the bottom film, and the welding pins are connected to the connecting pins.

[0011] Furthermore, a positioning column is arranged in the box body, and an avoidance hole is opened on the bottom film. The positioning column passes through the avoidance hole and the magnetic core component in the shielding box.

[0012] Furthermore, the shielding box is made of 1J85 alloy.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model improves the electromagnetic shielding effect by providing a shielding box. Meanwhile, the shielding box is fixedly connected to the PCB board. It only needs to clamp and fix the PCB board in the box body without additional glue dispensing, and the installation method is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional schematic diagram of the disassembled structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the utility model in an assembled state.

[0017] In the figure: 1. outer shell; 11. box body; 12. box cover; 2. shielding box; 21. bottom film; 22. shielding baffle; 23. welding pins; 3. PCB board; 31. board body; 32. connecting pins; 4. core assembly; 5. card slot; 6. pin slot; 7. support platform; 8. positioning column. DETAILED DESCRIPTION

[0018] 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.

[0019] like Figure 1-Figure 2 As shown, a magnetic shielding installation structure of a closed-loop current sensor includes a shell 1, a shielding box 2, a PCB board 3 and a magnetic core assembly 4, wherein the PCB board 3 and the shielding box 2 are installed in the shell 1 and the shielding box 2 is connected to the PCB board 3, the PCB board 3 is clamped and fixed in the shell 1, and the magnetic core assembly 4 is installed in the shielding box 2.

[0020] In this embodiment, the shell 1 includes a box body 11 and a box cover 12 connected to the upper side of the box body 11, four clips are provided on the upper side of the side of the box body 11, and the lower side of the box cover 12 is provided with buckles located on the edge and corresponding to the four clips, and the clips are correspondingly snap-connected to fix the box cover 12 to the box body 11.

[0021] In this embodiment, two opposite inner side surfaces of the box body 11 are integrally connected with a card slot 5 , and the PCB board 3 is vertically arranged with both ends being clamped in the card slot 5 .

[0022] In this embodiment, a pin slot 6 is formed on the front side of the box body 11 , and the PCB board 3 includes a board body 31 and connecting pins 32 located on the board body 31 . The connecting pins 32 pass through the pin slot 6 and extend to the outside of the box body 11 .

[0023] In this embodiment, a support platform 7 is integrally connected to the bottom of the inner side surface of the box body 11 , and the shielding box 2 is located on the support platform 7 .

[0024] In this embodiment, the shielding box 2 includes a bottom film 21 , a shielding baffle 22 welded around the outer side of the bottom film 21 , and welding pins 23 integrally connected to the bottom film 21 , and the welding pins 23 are welded to the connecting pins 32 .

[0025] In this embodiment, a positioning column 8 is integrally connected to the box body 11 , an escape hole is opened on the bottom film 21 , and the positioning column 8 passes through the escape hole and the magnetic core assembly 4 in the shielding box 2 , and the upper end of the positioning column 8 abuts against the lower side of the box cover 12 .

[0026] In this embodiment, the shielding box 2 is made of 1J85 alloy.

[0027] During production, the utility model welds and connects the pins of the PCB board 3 and the shielding box 2, and vertically inserts the two ends of the PCB board 3 into the card slots 5 in the box body 11. At this time, the pins of the PCB board 3 are located in the pin slots 6. At the same time, the shielding box 2 is located on the support platform 7 and the positioning column 8 passes through the avoidance hole on the shielding box 2 and the magnetic core component 4 in the shielding box 2. The box cover 12 is buckled on the upper side of the box body 11 and is installed by connecting the card feet and the buckles.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic shielding installation structure for a closed-loop current sensor, characterized in that: The invention comprises a shell, a shielding box, a PCB board and a magnetic core assembly. The PCB board and the shielding box are installed in the shell and the shielding box is connected to the PCB board. The PCB board is clamped and fixed in the shell, and the magnetic core assembly is installed in the shielding box.

2. The magnetic shielding installation structure of the closed-loop current sensor according to claim 1, characterized in that: The shell comprises a box body and a box cover which is clamped with the upper side of the box body.

3. The magnetic shielding installation structure of the closed-loop current sensor according to claim 2, characterized in that: The two opposite inner sides of the box body are provided with card slots, and the PCB board is carded in the card slots.

4. The magnetic shielding installation structure of the closed-loop current sensor according to claim 2, characterized in that: A pin groove is provided on the side of the box body, and the PCB board includes a board body and connecting pins located on the board body, and the connecting pins extend to the outside of the box body through the pin groove.

5. The magnetic shielding installation structure of the closed-loop current sensor according to claim 2, characterized in that: A support platform is arranged at the bottom of the inner side surface of the box body, and the shielding box is located on the support platform.

6. The magnetic shielding installation structure of the closed-loop current sensor according to claim 4, characterized in that: The shielding box comprises a bottom film, a shielding baffle arranged around the outer side of the bottom film, and welding pins connected to the bottom film, wherein the welding pins are connected to the connecting pins.

7. The magnetic shielding installation structure of the closed-loop current sensor according to claim 6, characterized in that: A positioning column is arranged in the box body, an avoidance hole is opened on the bottom film, and the positioning column passes through the avoidance hole and the magnetic core component in the shielding box.

8. The magnetic shielding installation structure of the closed-loop current sensor according to claim 1, characterized in that: The shielding box is made of 1J85 alloy.

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