A current sensor with grounded magnetic core and current sensor assembly method

Abstract

The present invention relates to the technical field of current sensors, and in particular to a current sensor with a grounded magnetic core and a current sensor assembly method. The current sensor includes an insulating body, in which a C-shaped magnetic core and a circuit board are provided. The insulating body is provided with a magnetic core mounting groove and a circuit board mounting groove. The magnetic core mounting groove is used to fill the C-shaped magnetic core, and the circuit board is used to fill the circuit board mounting groove from its groove. A grounding plate is fixedly pre-installed on the circuit board, and the grounding plate has a grounding end. A pressing portion is provided between two end heads of the C-shaped magnetic core in the magnetic core mounting groove. The grounding end presses on a side of the pressing portion facing the groove of the magnetic core mounting groove. The grounding end has two bent spring sheets formed by bending the two end heads of the C-shaped magnetic core when the C-shaped magnetic core is filled into the magnetic core mounting groove. The two bent spring sheets are elastically pressed together with the two end heads. The present invention effectively solves the technical problem in the prior art that the grounding plate needs to be prefabricated in advance, resulting in complicated processing technology and high assembly process requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of current sensors, and in particular to a current sensor with a grounded magnetic core and a current sensor assembly method. Background Art

[0002] Current sensors are widely used in new energy, intelligent transportation, industrial control, smart appliances, and smart grids. Commonly used current sensors use a magnetic sensing element as the sensitive component. A magnetic core with an air gap is placed around the conductor being measured, and the magnetic sensing unit is located in the air gap. Due to the law of electromagnetic induction, the magnetic core generates an induced potential. The magnetic sensing unit measures the magnetic field in the air gap of the core. The backend calculates the measured current based on the output signal of the magnetic sensing unit.

[0003] For the safety of people and instruments, the magnetic core needs to be grounded. The existing method of grounding the magnetic core is to conductively connect the magnetic core and the circuit board into one, and then conductively connect the grounding end of the circuit board to the external grounding piece to ground the magnetic core. For example, the Chinese utility model patent document with authorization announcement number CN210982584U discloses a grounding device and current sensor, which uses a connecting piece to achieve conductive connection between the magnetic core and the circuit board. Specifically, a protrusion is provided on one end of the connecting piece to press against the circuit board to achieve conductive contact, and a U-shaped structure is provided on the other end. The U-shaped structure has two contact arms, and each contact arm is provided with a spring piece to elastically press against the two end faces of the C-shaped magnetic core, thereby achieving conductive connection between the circuit board and the magnetic core.

[0004] During actual processing, the connecting piece (hereinafter referred to as the grounding piece) needs to be prefabricated at both ends in advance, and a conductive spring needs to be separately processed on the U-shaped structure at one end. The processing process is complicated, and during assembly, the U-shaped structure needs to be controlled to be centered in the gap formed by the two end faces of the C-shaped magnetic core, which also places high demands on the assembly process. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a current sensor with a grounded magnetic core, so as to solve the technical problem in the prior art that the grounding plate needs to be prefabricated in advance, resulting in complex processing technology and high assembly process requirements; the purpose of the present invention is also to provide a current sensor assembly method to assemble the above-mentioned current sensor with a grounded magnetic core.

[0006] To achieve the above-mentioned purpose, the current sensor with grounded magnetic core provided by the present invention adopts the following technical solutions:

[0007] A current sensor with a grounded magnetic core, comprising:

[0008] An insulating body, which contains a C-shaped magnetic core for sensing the current of the conductor to be measured and a circuit board for detecting changes in the magnetic field of the C-shaped magnetic core and outputting the detection results;

[0009] The insulating body is provided with a magnetic core mounting groove and a circuit board mounting groove, the magnetic core mounting groove is used to fill the C-shaped magnetic core from its groove, and the circuit board is used to fill the circuit board mounting groove from its groove;

[0010] A grounding plate is pre-installed on the circuit board, and the grounding plate has a grounding end that extends and is inserted into the magnetic core installation slot when the circuit board is filled into the circuit board installation slot;

[0011] A pressing portion is provided between the two end heads of the C-shaped magnetic core in the magnetic core mounting slot, and the grounding end is pressed against the side of the pressing portion facing the slot of the magnetic core mounting slot. The grounding end has two side bent spring sheets formed by bending the two end heads of the C-shaped magnetic core when the C-shaped magnetic core is filled into the magnetic core mounting slot. The two side bent spring sheets are elastically pressed and matched with the facing side faces of the two end heads in a one-to-one correspondence to realize the grounding connection between the C-shaped magnetic core and the circuit board.

[0012] The beneficial effect of the magnetic core grounded current sensor provided by the present invention is that during installation, the grounding plate is fixedly pre-installed on the circuit board so that the grounding end extends and is inserted into the magnetic core installation slot, and then the C-shaped magnetic core is placed in the magnetic core installation slot. When the C-shaped magnetic core is placed in the magnetic core installation slot, it cooperates with the top pressing portion to squeeze and bend the two ends of the grounding plate to form bent spring pieces. In this way, the grounding plate no longer needs to have prefabricated two-end structures. The conductive spring pieces at both ends are squeezed and bent when the C-shaped magnetic core is placed, and the contact is more reliable. This not only saves the processing technology before installation, but also makes the operation during assembly relatively simple. It only relies on the cooperation of the C-shaped magnetic core and the top pressing portion to squeeze the two ends of the grounding plate, effectively solving the technical problem in the prior art that the grounding plate needs to be prefabricated in advance, resulting in complicated processing technology and high assembly process requirements.

[0013] Furthermore, a channel connecting the magnetic core mounting slot and the circuit board mounting slot is provided on the insulating body, and the channel is for the grounding plate to pass through, so that the grounding plate extends and is inserted into the magnetic core mounting slot when the circuit board is filled.

[0014] Furthermore, the channel is a long hole structure.

[0015] Furthermore, the ground terminal includes a central body sheet located between the two bent spring sheets. A weakening structure is provided at the bent connection between the two bent spring sheets and the central body sheet. This structure allows the ends of the magnetic core to press against the two sides of the central body sheet to bend and form the two bent spring sheets when the C-shaped magnetic core is assembled. The weakening structure reduces the strength of the connection between the two bent spring sheets and the central body sheet, easing the difficulty of bending and pressing, and making the two bent spring sheets easier to form.

[0016] Furthermore, the weakened hole is a hole structure.

[0017] Furthermore, the insulating body has a first side surface and a second side surface arranged vertically, the notch of the magnetic core mounting groove is arranged on the first side surface, and the notch of the circuit board mounting groove is arranged on the second side surface; a top support protrusion is provided on the groove wall of the magnetic core mounting groove to press fit with the top of the C-shaped magnetic core; the C-shaped magnetic core is pressed and fixed by a sealing plate fixed at the notch of the magnetic core mounting groove.

[0018] Furthermore, the pressing portion is a U-shaped structure with its opening facing downward.

[0019] Furthermore, the insulating body contains a detection element, which is fixed to the circuit board via pins. The insulating body also contains a protective member located around the detection element. The protective member can protect the detection element and prevent the detection element from being accidentally deformed during assembly.

[0020] Furthermore, the protective member includes two elastic side plates arranged in parallel, and the detection element is clamped by the elastic force of the two elastic side plates. The detection element is installed in a clamping manner, which has the advantage of being easy to install and remove.

[0021] To achieve the above objectives, the current sensor assembly method provided by the present invention adopts the following technical solutions:

[0022] A current sensor assembly method includes the following steps:

[0023] (1) Insert the circuit board with the grounding plate pre-installed into the circuit board mounting slot of the insulating body of the current sensor so that the grounding end of the grounding plate extends into the magnetic core mounting slot of the insulating body;

[0024] (2) The C-shaped magnetic core is loaded into the slot of the magnetic core mounting slot of the insulating body, and the grounding end of the grounding plate is pressed onto the pre-set pressing portion in the magnetic core mounting slot by the two ends of the C-shaped magnetic core. As the C-shaped magnetic core is loaded, the two ends of the grounding end are bent to form bent spring sheets on both sides, so that the two ends of the C-shaped magnetic core arranged facing each other are elastically pressed and matched with the bent spring sheets on both sides of the grounding end, thereby realizing the grounding connection between the C-shaped magnetic core and the circuit board.

[0025] The beneficial effect of the current sensor assembly method provided by the present invention is that during installation, the grounding plate is fixedly pre-installed on the circuit board so that the grounding end extends and is inserted into the magnetic core installation slot, and then the C-shaped magnetic core is placed in the magnetic core installation slot. When the C-shaped magnetic core is placed in the magnetic core installation slot, it cooperates with the top pressing portion to squeeze and bend the two ends of the grounding plate to form bent spring pieces. In this way, the grounding plate no longer needs to have prefabricated two-end structures. The conductive spring pieces at the two ends are squeezed and bent when the C-shaped magnetic core is placed, and the contact is more reliable. This not only saves the processing technology before installation, but also makes the operation during assembly relatively simple. It only relies on the cooperation of the C-shaped magnetic core and the top pressing portion to squeeze the two ends of the grounding plate, effectively solving the technical problem in the prior art that the grounding plate needs to be prefabricated in advance, resulting in complicated processing technology and high assembly process requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional schematic diagram of a current sensor with a grounded magnetic core provided by the present invention. Figure 1 ;

[0027] Figure 2 yes Figure 1 A lateral cross-sectional view of

[0028] Figure 3 This is a three-dimensional schematic diagram of a current sensor with a grounded magnetic core provided by the present invention. Figure 2 (The sealing plate and cover are not shown, and the C-shaped core is not shown in one of the core mounting slots);

[0029] Figure 4 This is a three-dimensional schematic diagram of a current sensor with a grounded magnetic core provided by the present invention. Figure 3 (The sealing plate and cover are not shown, and the C-shaped core is not shown in one of the core mounting slots);

[0030] Figure 5 This is a three-dimensional schematic diagram of a current sensor with a grounded magnetic core provided by the present invention. Figure 4 (The sealing plate and cover are not shown, and the C-shaped core is not shown in one of the core mounting slots);

[0031] Figure 6 This is a three-dimensional schematic diagram of a current sensor with a grounded magnetic core provided by the present invention. Figure 5 (exist Figure 5 The circuit board is not displayed on the basis of

[0032] Figure 7 It is a schematic diagram of the cooperation between the detection element and the protective element in the present invention;

[0033] Figure 8 Schematic diagram of the grounding plate after being squeezed in the present invention.

[0034] Numbers in the figure: 1. Insulating body; 2. Magnetic core mounting groove; 201. Top pressure part; 202. Top support protrusion; 3. Circuit board mounting groove; 4. Grounding plate; 41. Grounding terminal; 42. Intermediate main body plate; 43. Bending spring sheet; 44. Weakened hole; 5. Through hole; 7. Sealing plate; 8. Detection element; 9. Pin; 10. Protective part; 11. Sealing cover; 12. Circuit board; 13. C-shaped magnetic core; 14. First side surface; 15. Second side surface; 16. Elastic side plate. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0036] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention is further described below with reference to specific embodiments and drawings.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] In the description of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components, unless otherwise expressly specified or limited. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] In the description of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] In the prior art, the grounding plate is mainly prefabricated with both end structures in advance, and a conductive spring needs to be separately processed on the U-shaped structure at one end. The processing process is complicated. During assembly, the U-shaped structure needs to be controlled to be centered in the gap formed by the two end faces of the C-shaped magnetic core 13, which places high demands on the assembly process. In response to the prior art, the concept of the present invention is to adjust the installation method of the grounding plate so that the grounding plate is pressed into shape while the C-shaped magnetic core 13 is placed. Prefabrication is no longer required, the process is simple, and the assembly process requirements are low.

[0042] In view of the above concept, the current sensor is described in detail below:

[0043] Specific embodiments of the current sensor with grounded magnetic core provided by the present invention:

[0044] like Figure 1 and Figure 2 As shown, a current sensor with a grounded magnetic core includes an insulating body 1, a C-shaped magnetic core 13 for sensing the current of a conductor to be measured, and a circuit board 12 for detecting the magnetic field change of the C-shaped magnetic core 13 and outputting the detection result. Specifically, the insulating body 1 is provided with a magnetic core mounting slot 2 and a circuit board mounting slot 3, as shown in FIG. Figure 1 As shown, the insulating body 1 has a first side surface 14 and a second side surface 15 arranged vertically. The notch of the magnetic core mounting slot 2 is arranged on the first side surface 14, and the notch of the circuit board mounting slot 3 is arranged on the second side surface 15. Correspondingly, the notch of the magnetic core mounting slot 2 has a sealing plate 7, and the notch of the circuit board mounting slot 3 has a sealing cover 11.

[0045] like Figures 1 to 5 As shown, the magnetic core mounting slot 2 is used to install the C-shaped magnetic core 13 from its slot opening, and the circuit board 12 is used to install the circuit board mounting slot 3 from its slot opening. A grounding plate 4 is pre-installed on the circuit board 12. The grounding plate 4 has a grounding end 41 that extends and inserts into the magnetic core mounting slot 2 when the circuit board 12 is installed in the circuit board mounting slot 3. The pre-installed grounding plate 4 on the circuit board 12 can be fixed by welding or plugging.

[0046] A pressing portion 201 is provided between the two end heads of the C-shaped magnetic core 13 in the magnetic core mounting slot 2. Specifically, the pressing portion 201 is a U-shaped structure. The grounding end 41 presses on the slot side of the pressing portion 201 facing the magnetic core mounting slot 2. The grounding end 41 has two side bent springs 43 formed by bending the two end heads of the C-shaped magnetic core 13 when the C-shaped magnetic core 13 is filled into the magnetic core mounting slot 2. The two side bent springs 43 are elastically pressed and matched with the facing side faces of the two end heads in a one-to-one correspondence to realize the grounding connection between the C-shaped magnetic core 13 and the circuit board 12.

[0047] like Figure 4 As shown, the insulating body 1 is provided with a passage connecting the magnetic core mounting slot 2 and the circuit board mounting slot 3. The passage is for the grounding plate 4 to pass through, so that the grounding plate 4 can extend and be inserted into the magnetic core mounting slot 2 when the circuit board 12 is installed. Specifically, the passage is a through hole 5.

[0048] like Figure 4 、 Figure 5 and Figure 8 As shown, the grounding terminal 41 has a central body 42 located between the two side bent springs 43. A weakening structure is provided at the bent connection between the two side bent springs 43 and the central body 42. This allows the two ends of the magnetic core to press against the two side portions of the central body 42 to bend and form the two side bent springs 43 when the C-shaped magnetic core 13 is installed. The weakening structure reduces the strength of the connection between the two side bent springs 43 and the central body 42, reducing the difficulty of the pressing and bending, and making the two side bent springs 43 easier to form. Specifically, the weakening hole 44 is a weakening hole 44. In other embodiments, the weakening hole structure can also be replaced by a slot structure.

[0049] like Figure 3 and Figure 4As shown, the walls of the magnetic core mounting slot 2 are provided with a top-supporting protrusion 202 for press-fitting with the C-shaped magnetic core 13. The C-shaped magnetic core 13 is press-fitted and secured by a sealing plate 7 fixed to the slot opening of the magnetic core mounting slot 2. There are multiple top-supporting protrusions 202, which are arranged at intervals. In other embodiments, the number of top-supporting protrusions may also be one or two.

[0050] like Figure 6 and Figure 7 As shown, the insulating body 1 has a detection element 8, and the detection element 8 is fixed on the circuit board 12 by means of a pin 9. The insulating body 1 also has a protective member 10 located on the periphery of the detection element 8. The protective member 10 can provide protection for the detection element 8 to prevent the detection element 8 from being accidentally deformed during assembly. Specifically, the protective member 10 includes two elastic side plates 16 arranged in parallel, and the detection element 8 is clamped by the elastic force of the two elastic side plates 16. The detection element 8 is installed in a clamping manner, which has the advantage of convenient loading and unloading. In other embodiments, the detection element can also be fixed to the two side plates by a bolt structure. In addition, in this embodiment, the detection element is mainly a Hall sensor.

[0051] During installation, the grounding plate 4 is fixedly pre-installed on the circuit board 12 so that the grounding end extends and is inserted into the magnetic core mounting slot 2, and then the C-shaped magnetic core 13 is placed in the magnetic core mounting slot 2. When the C-shaped magnetic core 13 is placed in the magnetic core mounting slot 2, it cooperates with the top pressing portion 201 to squeeze and bend the two ends of the grounding plate 4 to form a bent spring piece 43. In this way, the grounding plate no longer needs to have prefabricated two-end structures. The conductive spring pieces at both ends are squeezed and bent when the C-shaped magnetic core is placed, and the contact is more reliable. This not only saves the processing technology before installation, but also makes the operation simpler during assembly. It only relies on the cooperation of the C-shaped magnetic core and the top pressing portion to squeeze the two ends of the grounding plate, which effectively solves the technical problem in the prior art that the grounding plate needs to be prefabricated in advance, resulting in complicated processing technology and high assembly process requirements.

[0052] The current sensor assembly method provided by the present invention is primarily for assembling the current sensor of the above-described embodiment. The core concept is to first install the grounding plate 4 on the circuit board 12, which is then installed on the insulating body 1 along with the circuit board 12. Then, when installing the C-shaped magnetic core 13 in the magnetic core mounting groove 2, the grounding plate 4 is pressed against the grounding plate 4 to form a bent spring 43 that presses against the C-shaped magnetic core 13. In view of the above concept, the assembly method is described in detail below:

[0053] Specific embodiments of the current sensor assembly method provided by the present invention:

[0054] A current sensor assembly method includes the following steps:

[0055] (1) Casting the insulating body 1;

[0056] (2) Pre-install the grounding plate 4 on the circuit board 12 by welding or plugging;

[0057] (3) Insert the circuit board 12 with the grounding plate 4 into the circuit board mounting slot 3 of the insulating body 1 of the current sensor, so that the grounding end 41 of the grounding plate 4 extends and is inserted into the magnetic core mounting slot 2 of the insulating body 1;

[0058] (4) The C-shaped magnetic core 13 is loaded into the slot of the magnetic core mounting slot 2 of the insulating body 1, and the grounding end 41 of the grounding plate 4 is pressed onto the top pressing portion 201 preset in the magnetic core mounting slot 2 by the two ends of the C-shaped magnetic core 13. As the C-shaped magnetic core 13 is loaded, the two ends of the grounding end 41 are bent to form two-side bent spring sheets 43, so that the two ends of the C-shaped magnetic core 13 arranged opposite to each other are elastically pressed and matched with the two-side bent spring sheets 43 of the grounding end 41, thereby realizing the grounding connection between the C-shaped magnetic core 13 and the circuit board 12.

[0059] (5) A sealing plate 7 at the notch of the encapsulated magnetic core mounting slot 2 and a sealing cover 11 at the notch of the circuit board mounting slot 3.

[0060] In the present invention, unless otherwise clearly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be internal communication between two elements or an interaction relationship between two elements. Unless otherwise clearly specified and limited, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0061] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A current sensor with a grounded magnetic core, comprising: An insulating body, which contains a C-shaped magnetic core for sensing the current of the conductor to be measured and a circuit board for detecting changes in the magnetic field of the C-shaped magnetic core and outputting the detection results; The invention is characterized in that: a magnetic core mounting groove and a circuit board mounting groove are provided on the insulating body, the magnetic core mounting groove is used to fill the C-shaped magnetic core from its groove, and the circuit board is used to fill the circuit board mounting groove from its groove; A grounding plate is pre-installed on the circuit board, and the grounding plate has a grounding end that extends and is inserted into the magnetic core installation slot when the circuit board is filled into the circuit board installation slot; A pressing portion is provided between the two end heads of the C-shaped magnetic core in the magnetic core mounting slot, and the grounding end is pressed against the side of the pressing portion facing the notch of the magnetic core mounting slot. The grounding end has two bent spring pieces formed by bending the two end heads of the C-shaped magnetic core when the C-shaped magnetic core is loaded into the magnetic core mounting slot. The two bent spring pieces are elastically pressed and matched with the facing side faces of the two end heads in a one-to-one correspondence to achieve grounding connection between the C-shaped magnetic core and the circuit board. The grounding end has a middle main body piece located between the two side bent spring pieces, and a weakening structure is provided at the bent connection between the two side bent spring pieces and the middle main body piece, so that when the C-shaped magnetic core is filled, the two ends of the magnetic core can press against the two side parts of the middle main body piece to bend and form the two side bent spring pieces; The insulating body is provided with a channel connecting the magnetic core mounting slot and the circuit board mounting slot, the channel being for the grounding plate to pass through, so that the grounding plate extends and is inserted into the magnetic core mounting slot when the circuit board is installed; The channel is a long hole structure; The weakened hole is a hole structure; The insulating body has a first side surface and a second side surface arranged vertically, the notch of the magnetic core mounting groove is arranged on the first side surface, and the notch of the circuit board mounting groove is arranged on the second side surface; a top support protrusion is provided on the groove wall of the magnetic core mounting groove to press fit with the top of the C-shaped magnetic core; the C-shaped magnetic core is pressed and fixed by a sealing plate fixed at the notch of the magnetic core mounting groove.

2. The current sensor with a grounded magnetic core according to claim 1, wherein: The pressing portion is a U-shaped structure with an opening facing downward.

3. The current sensor with a grounded magnetic core according to claim 1, wherein: The insulating body has a detection element therein, and the detection element is fixed on the circuit board through pin insertion. The insulating body also has a protective piece located on the periphery of the detection element.

4. The current sensor with a grounded magnetic core according to claim 3, wherein: The protective member comprises two elastic side plates arranged in parallel, and the detection element is clamped by the elastic force of the two elastic side plates.

5. A current sensor assembly method for assembling the current sensor according to any one of claims 1 to 4, characterized in that: The steps include: (1) Insert the circuit board with the grounding plate pre-installed into the circuit board mounting slot of the insulating body of the current sensor so that the grounding end of the grounding plate extends into the magnetic core mounting slot of the insulating body; (2) The C-shaped magnetic core is loaded into the slot of the magnetic core mounting slot of the insulating body, and the grounding end of the grounding plate is pressed onto the pre-set pressing portion in the magnetic core mounting slot by the two ends of the C-shaped magnetic core. As the C-shaped magnetic core is loaded, the two ends of the grounding end are bent to form bent spring sheets on both sides, so that the two ends of the C-shaped magnetic core arranged facing each other are elastically pressed and matched with the bent spring sheets on both sides of the grounding end, thereby realizing the grounding connection between the C-shaped magnetic core and the circuit board.

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