Magnetic core reliable grounding current sensor

Abstract

The utility model relates to the technical field of current sensors, in particular to a magnetic core reliable grounding current sensor, which comprises PINs, a PCB (printed circuit board), a Hall chip, a magnetic core, a grounding copper sheet and a shell. The magnetic core is fixed in the shell; and the PCB is arranged above the magnetic core, and the PCB is fixed in the shell. The magnetic core is of an annular structure with an opening. The Hall chip is arranged in the opening of the magnetic core, and the Hall chip is connected with the PCB; the grounding copper sheet is clamped on the magnetic core and is connected with the PCB; and the PINs are arranged at the upper end of the PCB and are connected with the PCB. According to the magnetic core reliable grounding current sensor, the grounding copper sheet is clamped on the magnetic core and has a certain pre-tightening force, so that glue cannot flow into a gap between the grounding copper sheet and the magnetic core in the glue injection process of the current sensor; and the grounding copper sheet does not generate displacement, so that the fault of grounding failure can be greatly reduced, and the yield of the current sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of current sensors, in particular to a magnetic core reliable grounding current sensor. Background Art

[0002] Current sensors are widely used in various electronic products. For example, the grounding method used by the 1508 type current sensor is to use physical contact between the inner supports on both sides of the ordinary thin spring sheet to achieve magnetic grounding. In the subsequent product glue filling process, the internal stress when the internal glue solidifies will cause the thin spring sheet to deform. After the entire product is assembled, the glue will be filled and sealed. Then, during the drying process, the glue will cause the thin spring sheet to lose its connection with the magnetic core. In layman's terms, the glue will flow into the gap between the spring sheet and the magnetic core when it dries, and it may even push the spring sheet open, resulting in grounding failure and reducing the product yield of the sensor. Utility Model Content

[0003] The utility model aims at the technical problem that the 1508 type current sensor in the prior art is prone to magnetic core grounding failure, and provides a magnetic core reliable grounding current sensor.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A magnetic core reliable grounding current sensor, comprising: a PIN needle, a PCB circuit board, a Hall chip, a magnetic core, a grounding copper sheet and a shell;

[0006] The magnetic core is fixed inside the shell; the PCB circuit board is arranged above the magnetic core, and the PCB circuit board is fixed inside the shell;

[0007] The magnetic core is a ring-shaped structure with an opening;

[0008] The Hall chip is arranged in the opening of the magnetic core, and the Hall chip is connected to the PCB circuit board; the grounding copper sheet is clamped on the magnetic core, and the grounding copper sheet is connected to the PCB circuit board;

[0009] The PIN needle is arranged at the upper end of the PCB circuit board and connected to the PCB circuit board.

[0010] Further: the inner side of the housing is provided with: a first card slot;

[0011] The first clamping slot is configured to have a shape matching that of the grounding copper sheet, and the lower end of the grounding copper sheet is clamped and fixed in the first clamping slot.

[0012] Further: the inner side of the shell is provided with: a second card slot;

[0013] The second slot is configured to have a shape matching that of the magnetic core, and the magnetic core is fixed in the second slot.

[0014] Further: the grounding copper sheet includes: a connecting portion, a first clamping claw, a second clamping claw and a power connection portion;

[0015] The first claw is fixedly connected to the inner side of the connecting portion, and the second clamp is fixedly connected to the outer side of the connecting portion; the power connection portion is fixedly connected to the outer side of the connecting portion;

[0016] The first claw and the second claw are clamped and fixed on the magnetic core;

[0017] The power connection part is connected to the PCB circuit board.

[0018] Furthermore: two first claws are provided, and one second claw is provided.

[0019] The magnetic core reliable grounding current sensor provided by the utility model has at least the following beneficial effects or advantages:

[0020] The utility model provides a magnetic core reliable grounding current sensor, and the magnetic core is fixed inside the shell. The PCB circuit board is arranged above the magnetic core, and the PCB circuit board is fixed inside the shell. The magnetic core is a ring structure with an opening; the Hall chip is arranged in the opening of the magnetic core, and the Hall chip is connected to the PCB circuit board; the grounding copper sheet is clamped on the magnetic core, and the grounding copper sheet is connected to the PCB circuit board. The PIN pin is arranged at the upper end of the PCB circuit board and connected to the PCB circuit board. The magnetic core reliable grounding current sensor, the grounding copper sheet is clamped on the magnetic core, and has a certain pre-tightening force, so that during the glue injection process of the current sensor, the glue will not flow into the gap between the grounding copper sheet and the magnetic core; and the grounding copper sheet will not be displaced, which can greatly reduce the failure of grounding and improve the yield rate of the current sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the external structure of a magnetic core reliable grounding current sensor provided in an embodiment of the utility model.

[0022] Figure 2 A schematic diagram of the internal structure of a magnetic core reliable grounding current sensor provided by an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the grounding copper sheet structure provided in an embodiment of the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1-shell, 2-magnetic core, 3-PCB circuit board, 4-PIN needle, 5-opening of magnetic core, 6-grounding copper sheet, 61-connecting part, 62-first claw, 63-second claw, 64-power connection part, 7-Hall chip. DETAILED DESCRIPTION

[0026] The utility model aims at the technical problem that the 1508 type current sensor in the prior art is prone to magnetic core grounding failure, and provides a magnetic core reliable grounding current sensor.

[0027] 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 of 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.

[0028] The utility model embodiment provides a magnetic core reliable grounding current sensor, such as Figure 1 and Figure 2 As shown, it mainly includes: PIN pin 4, PCB circuit board 3, Hall chip, magnetic core 2, grounding copper sheet 6 and shell 1. Among them: magnetic core 2 is fixed inside shell 1; PCB circuit board 3 is arranged above magnetic core 2, and PCB circuit board 3 is fixed inside shell 1. Magnetic core 2 is a ring structure with an opening. Hall chip 7 is arranged in opening 5 of magnetic core, Hall chip 7 does not contact with magnetic core 2, and Hall chip 7 is connected with PCB circuit board 3.

[0029] like Figure 2 and Figure 3 As shown, the grounding copper sheet 6 is arranged at the opening 5 of the magnetic core, the grounding copper sheet 6 is clamped on the magnetic core 2, and the grounding copper sheet 6 is connected to the PCB circuit board 3. Specifically, the grounding copper sheet 6 includes: a connecting portion 61, a first clamping claw 62, a second clamping claw 63 and an electrical connection portion 64. The first clamping claw 62 is fixedly connected to the inner side of the connecting portion 61, and the second clamping claw is fixedly connected to the outer side of the connecting portion 61; the electrical connection portion 64 is fixedly connected to the outer side of the connecting portion 61. The first clamping claw 62 and the second clamping claw 63 are clamped and fixed on the magnetic core 2; the electrical connection portion 64 is connected to the PCB circuit board 3. In this embodiment, two first clamping claws 62 are provided, and the two first clamping claws 62 are arranged in parallel, and one second clamping claw 63 is provided.

[0030] The PIN pin 4 is arranged at the upper end of the PCB circuit board 3 and connected to the PCB circuit board 3, and the pin of the PIN pin 4 is led outward from the upper end of the current sensor. Other positions or spaces inside the housing 1 are used for glue injection filling.

[0031] In order to further prevent the grounding copper sheet 6 from being displaced during the glue injection process and affecting the grounding effect, in a preferred embodiment provided by the utility model, a first slot is provided inside the housing 1. The first slot is configured to match the shape of the grounding copper sheet 6, and the lower end of the grounding copper sheet 6 is fixedly secured in the first slot.

[0032] In order to achieve reliable fixation of the magnetic core 2, reduce the use of metal connectors, and prevent the metal connectors from affecting the current sensor, in a preferred embodiment provided by the utility model, a second slot is provided on the inner side of the housing 1. The second slot is set to a shape matching the magnetic core 2, and the magnetic core 2 is fixed in the second slot.

[0033] like Figure 1-Figure 3 As shown, the magnetic core reliable grounding current sensor provided by the embodiment of the utility model has at least the following beneficial effects or advantages:

[0034] The magnetic core reliable grounding current sensor provided by the embodiment of the utility model has a magnetic core 2 fixed inside the housing 1. The PCB circuit board 3 is arranged above the magnetic core 2, and the PCB circuit board 3 is fixed inside the housing 1. The magnetic core 2 is a ring structure with an opening; the Hall chip 7 is arranged in the opening 5 of the magnetic core, and the Hall chip 7 is connected to the PCB circuit board 3; the grounding copper sheet 6 is clamped on the magnetic core 2, and the grounding copper sheet 6 is connected to the PCB circuit board 3. The PIN needle 4 is arranged at the upper end of the PCB circuit board 3 and connected to the PCB circuit board 3. The magnetic core 2 is a reliable grounding current sensor, and the grounding copper sheet 6 is clamped on the magnetic core 2, with a certain pre-tightening force, so that during the glue injection process of the current sensor, the glue will not flow into the gap between the grounding copper sheet 6 and the magnetic core 2; and the grounding copper sheet 6 will not be displaced, which can greatly reduce the failure of grounding and improve the yield rate of the current sensor.

[0035] In the description of the present utility model, it should be noted that the terminology nouns in the various embodiments, such as words indicating directions such as "upper", "lower", "front", "back", "left", "right", etc., are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the referred elements and devices must be operated according to the specific directions and specified operations and methods and structures in the specification. Such directional nouns do not constitute limitations on the present utility model.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic core reliable grounding current sensor, Features: include: PIN pin, PCB circuit board, Hall chip, magnetic core, grounding copper sheet and shell; The magnetic core is fixed inside the shell; the PCB circuit board is arranged above the magnetic core, and the PCB circuit board is fixed inside the shell; The magnetic core is a ring-shaped structure with an opening; The Hall chip is arranged in the opening of the magnetic core, and the Hall chip is connected to the PCB circuit board; the grounding copper sheet is clamped on the magnetic core, and the grounding copper sheet is connected to the PCB circuit board; The PIN needle is arranged at the upper end of the PCB circuit board and connected to the PCB circuit board.

2. The magnetic core reliable grounding current sensor according to claim 1, Features: The inner side of the housing is provided with: a first card slot; The first clamping slot is configured to have a shape matching that of the grounding copper sheet, and the lower end of the grounding copper sheet is clamped and fixed in the first clamping slot.

3. The magnetic core reliable grounding current sensor according to claim 1, Features: The inner side of the housing is provided with: a second card slot; The second slot is configured to have a shape matching that of the magnetic core, and the magnetic core is fixed in the second slot.

4. The magnetic core reliable grounding current sensor according to claim 1, Features: The grounding copper sheet comprises: a connecting portion, a first clamping claw, a second clamping claw and a power connection portion; The first claw is fixedly connected to the inner side of the connecting portion, and the second clamp is fixedly connected to the outer side of the connecting portion; the power connection portion is fixedly connected to the outer side of the connecting portion; The first claw and the second claw are clamped and fixed on the magnetic core; The power connection part is connected to the PCB circuit board.

5. The magnetic core reliable grounding current sensor according to claim 4, Features: The first clamping claws are provided with two and the second clamping claws are provided with one.

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