CN219065591U

CN219065591U - PCB-level Hall current sensor

Info

Publication number: CN219065591U
Application number: CN202223304618.6U
Authority: CN
Inventors: 文健; 刘本阳; 王超; 李栋; 黄晓彬; 王茜; 张宇豪; 武启萌
Original assignee: Shaanxi Changling Maiteng Electronics Co ltd
Current assignee: Shaanxi Changling Maiteng Electronics Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-05-23
Anticipated expiration: 2032-12-09

Abstract

The PCB-level Hall current sensor comprises a box-type shell, a cover plate, a PCB, hall elements, a U-shaped magnetic core and a coil, wherein vertical clamping grooves are symmetrically formed in two opposite side walls in the box-type shell, and the PCB is inserted into the vertical clamping grooves; a U-shaped magnetic core is arranged on the inner bottom surface of the box-shaped shell, an air gap is formed at one end, close to the PCB, of the U-shaped magnetic core, and a coil is wound at one end, far away from the PCB; the Hall element is arranged in the air gap and is electrically connected with the PCB; the cover plate is provided with a through hole corresponding to the coil leading-out end and a strip-shaped hole corresponding to the pin of the PCB, the cover plate is buckled on the port of the box-shaped shell, and the pin extends out of the strip-shaped hole, and the leading-out end extends out of the through hole. According to the utility model, the vertical clamping groove is arranged in the shell, and the PCB is directly inserted into the clamping groove and then fixed, so that the structure is simplified, the parts are reduced, and the production difficulty and the production cost are reduced.

Description

PCB-level Hall current sensor

Technical Field

The utility model belongs to the technical field of Hall current sensors, and particularly relates to a PCB-level Hall current sensor.

Background

The existing PCB-level Hall current sensor comprises a shell, a support, a magnetic core, a PCB and a cover plate, wherein the support is fixedly connected to the cover plate through a buckle, the magnetic core is installed on one side of the support and integrated with the support through an injection molding process, a coil is wound on the magnetic core, the other side of the support is fixedly provided with the PCB, a lead-out end of the coil and a pin of the PCB penetrate through the cover plate to extend to the outside of the cover plate, the shell is installed on the periphery of the support, the magnetic core and the PCB, and the shell is integrated with the cover plate through the buckle.

Disclosure of Invention

The utility model provides a PCB-level Hall current sensor, which overcomes the defects in the prior art.

The technical scheme adopted by the utility model is as follows: the PCB-level Hall current sensor comprises a box-type shell, a cover plate, a PCB, hall elements, a U-shaped magnetic core and a coil, wherein vertical clamping grooves are symmetrically formed in two opposite side walls in the box-type shell, and the PCB is inserted into the vertical clamping grooves; a U-shaped magnetic core is arranged on the inner bottom surface of the box-shaped shell, an air gap is formed at one end, close to the PCB, of the U-shaped magnetic core, and a coil is wound at one end, far away from the PCB; the Hall element is arranged in the air gap and is electrically connected with the PCB; the cover plate is provided with a through hole corresponding to the coil leading-out end and a strip-shaped hole corresponding to the pin of the PCB, the cover plate is buckled on the port of the box-shaped shell, and the pin extends out of the strip-shaped hole, and the leading-out end extends out of the through hole.

The port of the box-shaped shell extends to the side wall opposite to the PCB to form an L-shaped opening, and one side of a component of the PCB faces outwards; the cover plate is an L-shaped cover plate matched with the L-shaped opening, the L-shaped cover plate is buckled on the L-shaped opening, and the through holes and the strip-shaped holes are positioned on the horizontal plane of the L-shaped cover plate.

The vertical clamping groove is formed by two bosses which are oppositely arranged and have a gap.

The boss is arranged at the upper end and the lower end of the two opposite side walls.

Polyurethane is filled in the box-shaped shell at one side of the PCB without components.

The L-shaped cover plate is characterized in that grooves are uniformly distributed on the outer side of the edge of the L-shaped opening, buckles are arranged at positions, corresponding to the grooves, of the inner side of the edge of the L-shaped cover plate, and the L-shaped cover plate is buckled on the L-shaped opening through the buckles clamped into the grooves.

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

1. according to the utility model, the vertical clamping groove is arranged in the shell, and the PCB is directly inserted into the clamping groove and then fixed, so that the structure is simplified, the parts are reduced, and the production difficulty and the production cost are reduced.

2. According to the utility model, polyurethane is filled in the cavity of the side of the PCB without components, so that normal heat dissipation of the components on the PCB is not affected, the position change of the magnetic core, the Hall element and the coil caused by vibration in the using process can be effectively prevented, the increase of an air gap caused by expansion of the magnetic core along with the increase of the temperature or the decrease of the air gap contracted by the magnetic core along with the decrease of the temperature is prevented, and the output precision of the sensor is ensured.

3. According to the utility model, the port of the box-shaped shell is expanded into the L-shaped opening and matched with the L-shaped cover plate, so that the assembly and the test of the sensor are facilitated.

Drawings

FIG. 1 is a cross-sectional view of the structure of the present utility model;

FIG. 2 is a schematic view of the appearance structure of the present utility model;

FIG. 3 is a schematic view of the structure of the utility model with the L-shaped cover plate removed;

FIG. 4 is a schematic view of the box housing structure of the present utility model;

FIG. 5 is a schematic view of the structure of the L-shaped cover plate of the present utility model.

Detailed Description

The utility model will now be described in detail with reference to figures 1-5 and the detailed description.

The PCB-level Hall current sensor comprises a box-shaped shell 1, a cover plate 2, a PCB 3, a Hall element 4, a U-shaped magnetic core 5 and a coil 6, wherein vertical clamping grooves 1-1 are symmetrically formed in two opposite side walls in the box-shaped shell 1, and the PCB 3 is inserted into the vertical clamping grooves 1-1; the inner bottom surface of the box-shaped shell 1 is provided with a U-shaped magnetic core 5, one end of the U-shaped magnetic core 5, which is close to the PCB 3, is provided with an air gap 5-1, and one end, which is far away from the PCB 3, is wound with a coil 6; the Hall element 4 is arranged in the air gap 5-1 and is electrically connected with the PCB 3; the cover plate 2 is provided with a through hole 2-1 corresponding to the leading-out end 6-1 of the coil 6 and a strip-shaped hole 2-2 corresponding to the pin 3-1 of the PCB 3, the cover plate 2 is buckled on the port of the box-shaped shell 1, the pin 3-1 extends out of the strip-shaped hole 2-2, and the leading-out end 6-1 extends out of the through hole 2-1.

In one embodiment, the box-shaped casing 1 on the component-free side of the PCB 3 is filled with polyurethane. The magnetic core 5 is fixed with the Hall element 4 and the coil 6, so that the position change of the magnetic core 5, the Hall element 4 and the coil 6 caused by vibration in the using process is effectively prevented, and meanwhile, the increase of an air gap caused by the expansion of the magnetic core when the temperature is increased or the decrease of the air gap caused by the contraction of the magnetic core when the temperature is reduced is prevented, and the output precision of the sensor is ensured.

In one embodiment, the port of the box-shaped shell 1 extends to the side wall opposite to the PCB 3 to form an L-shaped opening, and one side of the component of the PCB 3 faces outwards; the cover plate 2 is an L-shaped cover plate matched with the L-shaped opening, the L-shaped cover plate is buckled on the L-shaped opening, and the through hole 2-1 and the strip-shaped hole 2-2 are positioned on the horizontal plane of the L-shaped cover plate.

Preferably, grooves 1-3 are uniformly distributed on the outer side of the edge of the L-shaped opening, a buckle 2-3 is arranged on the inner side of the edge of the L-shaped cover plate and corresponds to the grooves 1-3, and the L-shaped cover plate is buckled on the L-shaped opening by the buckle 2-3 being clamped into the groove 1-3.

In one embodiment, the vertical clamping groove 1-1 is formed by two bosses 1-2 which are oppositely arranged and have a gap.

Preferably, the bosses 1-2 are disposed at upper and lower ends of the two opposite sidewalls, and ensure that the bosses 1-2 clamp the PCB 3.

The above embodiments are only preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, so that all equivalent modifications made by the appended claims shall be included in the scope of the present utility model.

Claims

1. A PCB board level Hall current sensor is characterized in that: the novel magnetic circuit breaker comprises a box-shaped shell (1), a cover plate (2), a PCB (3), a Hall element (4), a U-shaped magnetic core (5) and a coil (6), wherein vertical clamping grooves (1-1) are symmetrically formed in two opposite side walls in the box-shaped shell (1), and the PCB (3) is inserted into the vertical clamping grooves (1-1); a U-shaped magnetic core (5) is arranged on the inner bottom surface of the box-shaped shell (1), an air gap (5-1) is formed at one end, close to the PCB (3), of the U-shaped magnetic core (5), and a coil (6) is wound at one end, far away from the PCB (3); the Hall element (4) is arranged in the air gap (5-1) and is electrically connected with the PCB (3); the PCB is characterized in that a through hole (2-1) corresponding to a lead-out end (6-1) of the coil (6) and a strip-shaped hole (2-2) corresponding to a pin (3-1) of the PCB (3) are arranged on the cover plate (2), the cover plate (2) is buckled on a port of the box-shaped shell (1), the pin (3-1) extends out of the strip-shaped hole (2-2), and the lead-out end (6-1) extends out of the through hole (2-1).

2. The PCB-level hall current sensor of claim 1, wherein: the port of the box-shaped shell (1) extends to the side wall opposite to the PCB (3) to form an L-shaped opening, and one side of a component of the PCB (3) faces outwards; the cover plate (2) is an L-shaped cover plate matched with the L-shaped opening, the L-shaped cover plate is buckled on the L-shaped opening, and the through hole (2-1) and the strip-shaped hole (2-2) are positioned on the horizontal plane of the L-shaped cover plate.

3. A PCB-level hall current sensor according to claim 1 or 2, wherein: the vertical clamping groove (1-1) is formed by two bosses (1-2) which are oppositely arranged and have gaps.

4. A PCB-level hall current sensor according to claim 3, wherein: the bosses (1-2) are arranged at the upper end and the lower end of the two opposite side walls.

5. The PCB-level hall current sensor of claim 4, wherein: polyurethane is filled in the box-shaped shell (1) at one side of the PCB (3) without components.

6. A PCB-level hall current sensor according to claim 2, wherein: grooves (1-3) are uniformly distributed on the outer side of the edge of the L-shaped opening, a buckle (2-3) is arranged at the position, corresponding to the groove (1-3), of the inner side of the edge of the L-shaped cover plate, and the L-shaped cover plate is buckled on the L-shaped opening by the buckle (2-3) being clamped into the groove (1-3).