CN220399477U

CN220399477U - Current sensor shell

Info

Publication number: CN220399477U
Application number: CN202321229846.3U
Authority: CN
Inventors: 张洪瑞; 吴建安
Original assignee: Shenzhen Avadi Technology Co ltd
Current assignee: Shenzhen Avadi Technology Co ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2024-01-26
Anticipated expiration: 2033-05-19

Abstract

The utility model relates to a current sensor housing comprising: casing, magnetic core, PCBA board and copper line, the casing is the square structure that is equipped with arc structure on the one corner, and the casing includes: upper and lower shells, the lower shell includes: the two limiting blocks are positioned on an external tangent extension line of the arc-shaped structure, and the limiting blocks and the arc-shaped structure form a fixing groove for placing the U-shaped magnetic core; the two cylindrical holes are respectively positioned in the circle center of the arc-shaped structure and the right angle closest to the arc-shaped structure, the cylindrical holes are used for installing copper wires, and the connecting lines of the cylindrical holes are parallel to a group of opposite shell walls of the lower shell. The lower shell is used for overlapping and fixing the magnetic core and the copper wire through the fixed groove and the cylindrical hole, the chip on the PCBA board is located in the U-shaped opening of the magnetic core through the positioning column, the space structure in the shell is reasonably utilized, the stability of the magnetic induction element is guaranteed, the accuracy of measuring the current is guaranteed, the volume of the current sensor shell is reduced, the die sinking difficulty is reduced through an ultrasonic welding mode, and the production cost is saved.

Description

Current sensor shell

Technical Field

The utility model relates to the technical field of current sensors, in particular to a current sensor shell.

Background

The current sensor in the prior art is used for detecting the information of the detected current, inherits the advantages of reliable insulation of the primary side and the secondary side of the transformer, solves the defects of high price and large volume of a transmission transmitter and is matched with the transformer, provides an analog-digital conversion opportunity for automatic management systems such as microcomputer detection and the like, and is widely applied. The existing current sensor shell is not specially provided with a magnetic induction element placing groove, so that the magnetic induction element is easy to deviate, current test is inaccurate, the size of the current sensor shell is overlarge, and the die sinking cost is high.

Disclosure of Invention

The technical problem to be solved by the present utility model is to provide a current sensor housing, which aims at the above-mentioned drawbacks of the prior art.

The technical scheme adopted for solving the technical problems is as follows: a current sensor housing is presented, a current sensor housing comprising: casing, magnetic core, PCBA board and copper line, the casing is equipped with the square structure of arc structure for one corner, the casing includes: an upper case and a lower case, the lower case comprising:

the two limiting blocks are positioned on an external tangent extension line of the arc-shaped structure, and the limiting blocks and the arc-shaped structure form a fixing groove for placing the U-shaped magnetic core;

the copper wire connecting device comprises two cylindrical holes, wherein the cylindrical holes are respectively positioned at the center of the arc-shaped structure and in the right angle closest to the arc-shaped structure, the cylindrical holes are used for installing the copper wire, and the connecting lines of the cylindrical holes are parallel to a group of opposite shell walls of the lower shell.

In some embodiments, the copper wire is sleeved with an insulating sleeve, and the material of the insulating sleeve is teflon.

In some embodiments, the lower shell further comprises: a plurality of pin grooves;

the pin grooves are positioned on the inner side of the parallel shell wall far away from the cylindrical holes and are used for installing signal terminals, and the signal terminals are arranged on the PCBA board.

In some embodiments, the lower shell further comprises: the connecting lines of the positioning columns are parallel to the pin grooves, and the positioning columns are respectively close to a group of opposite shell walls of the lower shell.

In some embodiments, two positioning holes are formed in the PCBA board, and the positioning holes are matched with the positioning columns to fix the PCBA board on the lower shell.

In some embodiments, the PCBA board further comprises: the chip is positioned at the upper end of the U-shaped opening of the magnetic core and is a magnetic field detection element.

In some embodiments, a housing wall adjacent to and parallel to the pin slots is lower than other housing walls of the lower housing, forming a mounting opening for mounting the PCBA board.

In some embodiments, the upper shell comprises: and the baffle is arranged between the PCBA and the copper wire.

In some embodiments, the upper shell further comprises: and the upper shell and the lower shell are welded by ultrasonic wires in an ultrasonic mode.

According to the utility model, the lower shell of the current sensor shell is overlapped with the magnetic core and the copper wire through the fixing groove and the cylindrical hole, and the chip on the PCBA board is positioned in the U-shaped opening of the magnetic core through the positioning column, so that the space structure in the shell is reasonably utilized, the stability of the magnetic induction element is ensured, the accuracy of measuring current is ensured, the volume of the current sensor shell is reduced, the die sinking difficulty is reduced in an ultrasonic welding mode, and the production cost is saved.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic perspective view of a current sensor housing of the present utility model;

FIG. 2 is an exploded view of the current sensor housing shown in FIG. 1;

FIG. 3 is a schematic view of the structure of the lower housing of the current sensor housing shown in FIG. 1;

FIG. 4 is a schematic structural view of an upper shell of the current sensor housing shown in FIG. 1;

FIG. 5 is a schematic structural view of a PCBA board of the current sensor housing shown in FIG. 1;

FIG. 6 is a cross-sectional view of the current sensor housing of FIG. 1 taken along A-A;

FIG. 7 is a schematic view of a portion of the structure of the current sensor housing of the present utility model;

fig. 8 is a schematic structural view of a current sensor housing of the present utility model that does not include an upper case.

Reference numerals illustrate:

an upper case 100, a baffle 110, an ultrasonic line 120;

PCBA board 200, chip 210, signal terminal body 220, signal terminal 230, positioning hole 240;

a magnetic core 300;

lower shell 400, cylindrical hole 410, limiting block 420, pin slot 430, positioning column 440, mounting port 450;

copper wire 500.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-8, a current sensor housing includes: casing, magnetic core 300, PCBA board 200 (printed circuit board) and copper line 500, the casing is the square structure that is equipped with protruding structure on the one corner, and protruding structure includes, but is not limited to for arc structure, and the casing includes: an upper case 100 and a lower case 400, the lower case 400 including: the two limiting blocks 420 and the two cylindrical holes 410 are arranged on an external tangent extension line of the arc-shaped structure, and the limiting blocks 420 and the arc-shaped structure form a fixed groove for placing the U-shaped magnetic core 300; the cylindrical holes 410 are respectively located at the center of the arc structure and within right angles closest to the arc structure, the cylindrical holes 410 are used for mounting copper wires 500, and the connection lines of the cylindrical holes 410 are parallel to a set of opposite shell walls of the lower shell 400.

Specifically, the external tangent line of the arc structure is the external tangent line of the point where the arc structure and the square structure are connected, the shape of the fixing groove is matched with the shape of the magnetic core 300, meanwhile, the cylindrical hole 410 positioned at the center of the arc structure is inside the magnetic core 300, the cylindrical hole 410 positioned at the right angle of the square structure is outside the magnetic core 300, namely, the copper wire 500 spans over the magnetic core 300, vertically overlaps with the magnetic core 300, and passes through the cylindrical hole 410 to be connected with the outside. The current sensor shell utilizes the protruding arc structure and the limiting block 420 to form a fixed slot, the movement of the magnetic core 300 is limited through the fixed slot, and the installation position of the copper wire 500 is limited through the two cylindrical holes 410, so that the magnetic induction element cannot be positioned cheaply, and the condition that the current test is inaccurate is avoided.

It should be noted that, in some embodiments, the magnetic core 300 may also have a rounded U-shaped structure, and in some embodiments, the magnetic core 300 may also have a flat U-shaped structure, and correspondingly, the protrusion structure may also have a square structure.

Further, in some embodiments, the copper wire 500 is sleeved with an insulating sleeve, and the material of the insulating sleeve is teflon. Teflon refers to polytetrafluoroethylene and plays an insulating role.

Further, in some embodiments, the lower shell 400 further comprises: the pin grooves 430 are located on the inner side of the parallel walls of the cylindrical hole 410, the pin grooves 430 are used for mounting the signal terminals 230, and the signal terminals 230 are arranged on the PCBA board 200. The number of the pin grooves 430 is not less than two, and can be adjusted according to actual needs.

Further, in some embodiments, the lower shell 400 further comprises: the connecting lines of the two positioning columns 440 are parallel to the pin grooves 430, and the positioning columns 440 are respectively close to a set of opposite shell walls of the lower shell 400. The connection line of the positioning column 440 is parallel to the connection line of the pin groove 430 and the cylindrical hole 410, and is fixed on the wall of the lower case 400.

Further, in some embodiments, two positioning holes 240 are provided on the PCBA board 200, and the positioning holes 240 cooperate with the positioning posts 440 to fix the PCBA board 200 to the lower case 400.

Further, in some embodiments, the PCBA board 200 further comprises: chip 210, chip 210 is located the U-shaped mouth upper end of magnetic core 300, and chip 210 is magnetic field detection element.

Specifically, the height of the positioning post 440 is higher than the height of the magnetic core 300, so that the height of the PCBA board 200 is higher than the magnetic core 300, and the chip 210 on the PCBA board 200 is just arranged at the opening of the U-shaped opening of the magnetic core 300, thereby not only reducing the space of the PCBA board 200, but also saving the installation space of the chip 210.

Further, in some embodiments, the walls adjacent to and parallel to the pin slots 430 are lower than the other walls of the lower housing 400, forming mounting openings 450. The mounting opening 450 is used for mounting the PCBA board 200 and the main body of the signal terminal 230, the PCBA board 200 and the signal terminal main body 220 have a certain thickness, and the mounting space of the PCBA board 200 and the signal terminal main body 220 can be reduced by the mounting opening 450.

Further, in some embodiments, the upper case 100 includes: baffle 110, baffle 110 is disposed between PCBA board 200 and copper wires 500. The baffle 110 has an L-shaped structure, and the baffle 110 has a surrounding structure and is arranged between the copper wires 500 and the PCBA board 200 to form a fixed isolation effect.

Further, in some embodiments, the upper shell 100 further comprises: the ultrasonic line 120, the upper case 100 and the lower case 400 are ultrasonically welded by the ultrasonic line 120. The upper shell 100 and the lower shell 400 are fixed in an ultrasonic welding mode, so that the existing pouring sealant fixing mode is replaced, the die opening difficulty of the shell is reduced, and the production cost is reduced.

Specifically, the magnetic core 300 is fixed in the fixing groove of the lower case 400, the copper wires 500 span over the magnetic core 300, the PCBA board 200 is fixed on the lower case 400 through the positioning posts 440, the chip 210 on the PCBA board 200 is disposed in the U-shaped opening of the magnetic core 300, the signal terminals 230 on the PCBA board 200 pass through the pin grooves 430 to be connected with the outside, and the main bodies of the PCBA board 200 and the signal terminals 230 are coplanar with the wall of the lower case 400 through the mounting openings 450. The lower shell 400 is used for overlapping and fixing the magnetic core 300 and the copper wire 500 through the fixing groove and the cylindrical hole 410, the chip 210 on the PCBA board 200 is positioned in the U-shaped opening of the magnetic core 300 through the positioning column 440, the space structure in the shell is reasonably utilized, the stability of the magnetic induction element is ensured, the accuracy of measuring the current is ensured, the volume of the current sensor shell is also reduced, the die sinking difficulty is reduced through an ultrasonic welding mode, and the production cost is saved.

What is not described in detail in this specification is prior art known to those skilled in the art.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same according to the content of the present utility model, and not to limit the scope of the present utility model. All equivalent changes and modifications made with the scope of the claims should be covered by the claims.

It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.

Claims

1. A current sensor housing comprising: casing, magnetic core, PCBA board and copper line, its characterized in that, the casing is equipped with the square structure of arc structure for the one corner on, the casing includes: an upper case and a lower case, the lower case comprising:

2. The current sensor housing of claim 1, wherein the copper wire is sheathed with an insulating sleeve, the insulating sleeve being made of teflon.

3. The current sensor housing of claim 1, wherein the lower housing further comprises: a plurality of pin grooves;

4. The current sensor housing of claim 3, wherein the lower housing further comprises: the connecting lines of the positioning columns are parallel to the pin grooves, and the positioning columns are respectively close to a group of opposite shell walls of the lower shell.

5. The current sensor housing of claim 4, wherein the PCBA plate is provided with two locating holes that cooperate with the locating posts to secure the PCBA plate to the lower housing.

6. The current sensor housing of claim 5, wherein the PCBA board further comprises: the chip is positioned at the upper end of the U-shaped opening of the magnetic core and is a magnetic field detection element.

7. The current sensor housing of claim 6, wherein a wall adjacent to and parallel to the pin slots is lower than the other walls of the lower housing, forming a mounting opening for mounting the PCBA board.

8. The current sensor housing of claim 7, wherein the upper housing comprises: and the baffle is arranged between the PCBA and the copper wire.

9. The current sensor housing of claim 8, wherein the upper housing further comprises: and the upper shell and the lower shell are welded by ultrasonic wires in an ultrasonic mode.