Current sensor

Abstract

The utility model discloses a current sensor, which comprises a shell, a circuit board and a magnetic core winding, the circuit board and the magnetic core winding are arranged in the shell, a connecting piece is arranged in the current sensor, and the connecting piece comprises a connecting piece main body and a U-shaped clamping groove connected with the connecting piece main body; a plurality of through holes are formed in the connecting piece main body, and PINs are arranged in the through holes in a penetrating manner; the U-shaped clamping groove is fixed to one side of the connecting piece body, and part of the magnetic core winding is embedded into the U-shaped clamping groove to be connected with the connecting piece. By improving the connection mode between the circuit board and the magnetic core winding in the current sensor, the contact thickness between the wire inlet end and the wire outlet end of the magnetic core winding and the PIN needle is relatively increased, welding is facilitated, and the magnetic core winding is fixed through a U-shaped clamping groove by using a connecting piece so as to provide use stability; in this way, wire breaking between the wire inlet end and the wire outlet end of the magnetic core winding and the PIN during welding and when the magnetic core winding is used is avoided, the wiring hole in the circuit board is connected with the upper end of the PIN, direct welding of the magnetic core winding and the circuit board is avoided, and the use stability of the current sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor structure design, in particular to a current sensor. Background Art

[0002] In existing current sensors, the core windings (e.g., copper windings) in the core windings are directly welded on the PCB board. This connection method has certain limitations, that is, the wire diameter of the core windings must be above Φ0.5mm, otherwise there is a risk of wire breakage during welding, which makes it difficult to meet the requirements of automatic welding processes. However, in fluxgate current sensors used for leakage current detection, in order to achieve high measurement accuracy for tiny currents and high reliability for self-testing, the wire diameter of the core windings is selected to be between Φ0.1 and 0.2mm, and the existing design is difficult to meet the application requirements.

[0003] In addition, in the existing current sensor, the magnetic core winding is accompanied by vibration when the current sensor is in use. When the input and output ends of the magnetic core winding are not firmly connected, there is also a risk of disconnection. Utility Model Content

[0004] The utility model aims to provide a current sensor, which improves the connection mode between the magnetic core winding and the circuit board by arranging a connecting piece, so as to reduce the risk of welding breakage and use breakage.

[0005] In order to achieve the above purpose, the technical solutions of the utility model include:

[0006] A current sensor, comprising:

[0007] case;

[0008] A circuit board and a magnetic core winding, wherein the circuit board is installed in the housing;

[0009] Wherein, the current sensor further comprises a connecting piece, wherein the connecting piece comprises a connecting piece body and a U-shaped slot connected to the connecting piece body;

[0010] A plurality of through holes are provided inside the connector body, and the through holes are used to insert and install PIN pins; the U-shaped card slot is fixed on one side of the connector body, and a part of the magnetic core winding is embedded in the U-shaped card slot and connected and installed with the connector;

[0011] After the magnetic core winding is partially embedded in the U-shaped slot for installation, the incoming and outgoing wire ends of the magnetic core winding in the magnetic core winding are wound around and connected to the lower end of the PIN pin, and the wiring hole on the circuit board is sleeved with the upper end of the PIN pin.

[0012] Compared with the prior art, a current sensor of the present application includes a shell, a circuit board and a magnetic core winding installed in the shell. A connector is provided in the current sensor. A through hole is provided on the connector. The through hole is used to penetrate and install a PIN pin. The PIN pin is used to realize the connection between the magnetic core winding in the magnetic core winding and the circuit board. The connector includes a connector body and a U-shaped card slot connected to the connector body. In terms of the connection method, a part of the magnetic core winding is embedded in the U-shaped card slot and connected to the connector, and the inlet and outlet ends of the magnetic core winding are wound around and connected to the lower end of the PIN pin, which relatively increases the contact thickness between the inlet and outlet ends of the magnetic core winding and the PIN pin, which is conducive to welding. It is also relatively to use the connector to fix the magnetic core winding through the U-shaped card slot to provide stability in use, thereby avoiding the inlet and outlet ends of the magnetic core winding and the PIN during welding and when the magnetic core winding is in use. The wire between the N pins is disconnected, and the wiring hole on the circuit board is connected to the upper end of the PIN pin, which avoids the direct soldering of the magnetic core winding and the circuit board, and can avoid the problem of poor contact between the magnetic core winding and the circuit board in the existing design. The design of the above connector can increase the application reliability of the current sensor of the present application.

[0013] In the present application, the connector includes:

[0014] The connecting piece body is in a rectangular shape, and a plurality of through holes are provided inside the connecting piece body, and the plurality of through holes are arranged in a straight line.

[0015] In the present application, the magnetic core winding comprises a magnetic core body, a box encapsulating the magnetic core body, and a magnetic core winding wound around the outer periphery of the box;

[0016] After the core winding is wound on the box, the inlet and outlet ends of the core winding are located on the same side of the box.

[0017] Further, the magnetic core winding comprises a magnetic core body, a box encapsulating the magnetic core body, and a magnetic core winding wound around the outer periphery of the box;

[0018] Wherein, the outer periphery of the box is provided with bumps;

[0019] A card hole is provided on one side of the U-shaped card slot;

[0020] After the magnetic core winding is embedded in the U-shaped slot and connected and installed with the connector, the protrusion is embedded in the hole.

[0021] Furthermore, the U-shaped slot is similar in shape to the box.

[0022] Furthermore, one side of the connector body partially protrudes outward to form a step, the U-shaped slot is fixed to the connector body at the step, and a limiting groove is formed between the U-shaped slot and the connector body;

[0023] The housing is provided with card plates arranged opposite to and at intervals;

[0024] After the connecting piece is installed in the shell, the two clamping plates are embedded in the limiting groove to fix the position of the connecting piece.

[0025] In the present application, the housing includes

[0026] A base, wherein the base has a storage space, a card plate is arranged in the base, and the storage space is divided into a first section and a second section by the card plate, the first section is used for installing a connector and a circuit board, and the second section is used for installing a magnetic core winding;

[0027] The upper cover is installed above the base and is used to close the upper part of the base.

[0028] In the present application, buckle hooks are provided on both sides of the upper cover;

[0029] Buckle holes for use with buckle hooks are provided on both sides of the base;

[0030] The buckle hook is placed in the buckle hole so that the upper cover closes the upper part of the base.

[0031] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of a current sensor in this embodiment;

[0033] Figure 2 is a structural schematic diagram showing a shell of a current sensor in an open state in this embodiment;

[0034] Figure 3 is a structural exploded diagram of a current sensor in this embodiment; DETAILED DESCRIPTION

[0035] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0036] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0037] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0038] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0040] In existing current sensors, the core windings (e.g., copper windings) in the core windings are directly welded on the PCB board. This connection method has certain limitations, that is, the wire diameter of the core windings must be above Φ0.5mm, otherwise there is a risk of wire breakage during welding, which makes it difficult to meet the requirements of automatic welding processes. However, in fluxgate current sensors used for leakage current detection, in order to achieve high measurement accuracy for tiny currents and high reliability for self-testing, the wire diameter of the core windings is selected to be between Φ0.1 and 0.2mm, and the existing design is difficult to meet the application requirements.

[0041] In addition, in the existing current sensor, the magnetic core winding is accompanied by vibration when the current sensor is in use. When the input and output ends of the magnetic core winding are not firmly connected, there is also a risk of disconnection.

[0042] Therefore, the technical problem actually solved by the present application is how to achieve connection stability between the magnetic core winding and the circuit board.

[0043] As a preferred embodiment of the present application, Figures 1 to 3As shown, a current sensor comprises: a housing 1; a circuit board 2 and a magnetic core winding 3, wherein the circuit board 2 is installed in the housing 1;

[0044] The current sensor further comprises a connector 4, wherein the connector 4 comprises a connector body 41 and a U-shaped slot 42 connected to the connector body 41;

[0045] A plurality of through holes are provided inside the connector body 41, and the through holes are used to insert and install the PIN pins 5; the U-shaped slot 42 is fixed on one side of the connector body 41, and a part of the magnetic core winding 3 is embedded in the U-shaped slot 42 and connected and installed with the connector 4;

[0046] After the magnetic core winding 3 is partially embedded in the U-shaped slot 42 for installation, the incoming and outgoing wire ends of the magnetic core winding 3 are wound around and connected to the lower end of the PIN needle 5, and the wiring hole 21 on the circuit board 2 is sleeved on the upper end of the PIN needle 5.

[0047] A current sensor in this embodiment includes a shell 1, a circuit board 2 and a magnetic core winding 3 installed in the shell 1, a connector 4 is provided in the current sensor, a through hole is provided on the connector 4, the through hole is used to penetrate and install a PIN pin 5, and the PIN pin 5 is used to realize the connection between the magnetic core winding in the magnetic core winding 3 and the circuit board, the connector 4 includes a connector body 41 and a U-shaped card slot 42 connected to the connector body, in terms of the connection method, the magnetic core winding 3 is partially embedded in the U-shaped card slot 42 and connected to the connector 4, and the inlet and outlet ends of the magnetic core winding are wound and connected to the lower end of the PIN pin 5, which relatively increases the contact thickness between the inlet and outlet ends of the magnetic core winding and the PIN pin 5, which is conducive to welding, and relatively uses the connector 4 to fix the magnetic core winding 3 through the U-shaped card slot 42 to provide stability in use, thereby avoiding disconnection between the inlet and outlet ends of the magnetic core winding and the PIN pin during welding and when the magnetic core winding is in use, and the wiring hole on the circuit board connects the PIN The upper end of the N pin is free from direct welding of the core winding and the circuit board, which can avoid the problem of poor contact between the core winding and the circuit board 2 in the existing design. The design of the above connecting piece can increase the application reliability of the current sensor of the present application.

[0048] In this embodiment, as preferred, Figure 2 As shown, the connector 4 includes a connector body 41 in a rectangular shape, and a plurality of through holes are provided inside the connector body 41. In order to facilitate the connection between the PIN needle 5 and the input and output ends of the core winding 33, the plurality of through holes are arranged in a straight line.

[0049] exist Figure 1As shown in the figure, six PIN pins 5 are provided, and the six PIN pins 5 are arranged in a straight line and penetrate the connector body 41. In terms of the structural application of the current sensor, the sensor in this embodiment can meet the requirements of the design and application of three magnetic core windings 33.

[0050] On the other hand, in this embodiment, as preferred, Figures 2 to 3 As shown, the magnetic core winding 3 includes a magnetic core body (not shown), a box 32 encapsulating the magnetic core body (not shown), and a magnetic core winding 33 wound around the outer periphery of the box 32;

[0051] After the core winding 33 is wound on the box 32, the input end and the output end of the core winding 33 are located on the same side of the box 32, that is, after the core winding 33 is completed on the box 32, the input end and the output end of the core winding 33 are in the same horizontal plane, and then the lower end of the PIN needle 5 is uniformly connected to the input end and the output end of the core winding 33, and the lower end of the PIN needle 5 is connected to the circuit board 2, thereby avoiding complex connection and causing connection confusion.

[0052] In the application of the current sensor, the current sensor may vibrate when in use. In the vibrating state, there is a risk of disconnection of the connection between the inlet and outlet ends of the magnetic core winding 33 and the PIN pin 5 .

[0053] Therefore, according to the above, the input and output ends of the core winding 33 are connected to the PIN needle 5 in a winding manner, which can relatively increase the welding stability and reduce the risk of wire breakage. In addition, the risk of wire breakage can also be reduced by limiting the jitter of the core winding 3.

[0054] Therefore, in this embodiment, if Figure 3 As shown, the connecting member 4 includes:

[0055] A connector body 41, wherein a plurality of through holes are provided inside the connector body 41;

[0056] A U-shaped slot 42 is fixed on one side of the connector body 41 , and a portion of the magnetic core winding 3 is embedded in the U-shaped slot 42 and connected to the connector 4 for installation.

[0057] The magnetic core winding 3 is connected to the connector body 41 through the U-shaped slot 42, and the connector 4 is used to limit the magnetic core winding 3, so as to solve the problem of the magnetic core winding 3 in the current sensor shaking due to use.

[0058] In this embodiment, if Figure 3As shown, the magnetic core winding 3 includes a magnetic core body (not shown), a box 32 that encapsulates the magnetic core body (not shown), and a magnetic core winding 33 wound around the outer periphery of the box 32; wherein, a protrusion 321 is provided on the outer periphery of the box 32; a card hole 421 is provided on one side of the U-shaped card slot 42; after the magnetic core winding 3 is embedded in the U-shaped card slot 42 and connected and installed with the connecting piece 4, the protrusion 321 is embedded in the card hole 421.

[0059] The U-shaped slot 42 is similar in shape to the box 32 , so that the magnetic core winding 3 fits with the U-shaped slot 42 , avoiding a shaking space between the U-shaped slot 42 and the box 32 .

[0060] In addition, it can be known that after the connector 4 and the magnetic core winding 3 are used as a whole, the connector 4 can be fixed to limit the use jitter of the magnetic core winding 3.

[0061] like Figure 1 As shown, one side of the connector body 41 partially protrudes outward to form a step 411, the U-shaped slot is fixed to the connector body 41 at the step 411, and a limiting slot 43 is formed between the U-shaped slot 42 and the connector body 41; the shell is provided with relatively and spaced card plates 111; after the connector 4 is installed in the shell, the two card plates are embedded in the limiting slot 43 to fix the position of the connector.

[0062] The two clamping plates 111 clamp and fix the connector 4 through the limiting groove 43. When the magnetic core winding 3 has a shaking tendency, the connector 4 also has a shaking tendency. After the connector 4 is fixed by the two clamping plates 111, it affects the magnetic core winding 3, thereby reducing the shaking of the magnetic core winding.

[0063] In this embodiment, in order to achieve compact installation between the connector 4, the circuit board 2 and the magnetic core winding 3, as shown in FIG. Figures 2 to 3 As shown, the housing comprises:

[0064] A base 11, wherein the base 11 has a storage space, wherein a card plate 111 is arranged in the base 11, and the storage space is divided into a first section 101 and a second section 102 by the card plate 111, wherein the first section 101 is used for installing a connector 4 and a circuit board 2, and the second section 102 is used for installing a magnetic core winding 3; an upper cover 12, wherein the upper cover 12 is installed above the base 11 and is used for closing the upper side of the base 11.

[0065] In addition, as a detachable connection method between the base 11 and the upper cover 12, buckle hooks 121 are provided on both sides of the upper cover 12; buckle holes 112 used in conjunction with the buckle hooks 121 are provided on both sides of the base 11; the buckle hooks 121 are placed in the buckle holes 112 so that the upper cover 12 closes the top of the base 11.

[0066] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A current sensor, characterized in that: include: case; A circuit board and a magnetic core winding, wherein the circuit board is installed in the housing; Wherein, the current sensor further comprises a connecting piece, wherein the connecting piece comprises a connecting piece body and a U-shaped slot connected to the connecting piece body; A plurality of through holes are provided inside the connector body, and the through holes are used to insert and install PIN pins; the U-shaped card slot is fixed on one side of the connector body, and a part of the magnetic core winding is embedded in the U-shaped card slot and connected and installed with the connector; After the core winding is partially embedded in the U-shaped slot for installation, the incoming and outgoing wire ends of the core winding in the core winding are wound around and connected to the lower end of the PIN needle, and the wiring hole on the circuit board is sleeved with the upper end of the PIN needle.

2. The current sensor according to claim 1, characterized in that: The connecting piece comprises: The connecting piece body is in a rectangular shape, and a plurality of through holes are provided inside the connecting piece body, and the plurality of through holes are arranged in a straight line.

3. The current sensor according to claim 1, characterized in that: The magnetic core winding comprises a magnetic core body, a box encapsulating the magnetic core body, and a magnetic core winding wound around the outer periphery of the box; After the core winding is wound on the box, the inlet and outlet ends of the core winding are located on the same side of the box.

4. The current sensor according to claim 1, characterized in that: The magnetic core winding comprises a magnetic core body, a box encapsulating the magnetic core body, and a magnetic core winding wound around the outer periphery of the box; Wherein, the outer periphery of the box is provided with bumps; A card hole is provided on one side of the U-shaped card slot; After the magnetic core winding is embedded in the U-shaped slot and connected and installed with the connector, the protrusion is embedded in the hole.

5. The current sensor according to claim 4, characterized in that: The U-shaped slot is similar in shape to the box.

6. The current sensor according to claim 1, characterized in that: One side of the connector body partially protrudes outward to form a step, the U-shaped slot is fixed to the connector body at the step, and a limiting groove is formed between the U-shaped slot and the connector body; The housing is provided with card plates which are arranged oppositely and at intervals; After the connecting piece is installed in the shell, the two clamping plates are embedded in the limiting groove to fix the position of the connecting piece.

7. The current sensor according to claim 1, characterized in that: The housing comprises: A base, wherein the base has a storage space, a card plate is arranged in the base, and the storage space is divided into a first section and a second section by the card plate, the first section is used for installing a connector and a circuit board, and the second section is used for installing a magnetic core winding; The upper cover is installed above the base and is used to close the upper part of the base.

8. The current sensor according to claim 7, characterized in that: Buckles are provided on both sides of the upper cover; Buckle holes for use with buckle hooks are provided on both sides of the base; The buckle hook is placed in the buckle hole so that the upper cover closes the upper part of the base.

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