Integrated electric leakage sensor

Abstract

The utility model discloses an integrated electric leakage sensor which comprises a sensor shell, the sensor shell comprises an upper shell and a lower shell, the upper shell is arranged on the lower shell, the upper shell and the lower shell jointly define a containing cavity, a positioning part and a positioning block are arranged in the lower shell, the first end of the positioning part is connected with the inner wall of the lower shell, and the second end of the positioning part is connected with the inner wall of the lower shell. The first end of the positioning part is connected with the inner wall of the lower shell, the second end of the positioning part extends towards the outside of the lower shell, the first end of the positioning block is connected with the inner wall of the lower shell, the second end of the positioning block extends towards the outside of the lower shell, a printed circuit board is further arranged in the lower shell, and the printed circuit board is installed in the lower shell through cooperation of the positioning part and the positioning block. The printed circuit board is further provided with a plurality of installation grooves, and connecting terminals are arranged in the installation grooves. According to the utility model, the connecting terminal is directly welded on the printed circuit board and is communicated with the outside through the reserved channel of the shell, and an installation fixing structure of the terminal does not need to be additionally arranged on the shell, so that the assembly difficulty and the assembly cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of sensors, and in particular to an integrated leakage current sensor. Background Technology

[0002] Leakage current sensors are important components in electric vehicles. They are used to detect the high-voltage insulation performance, i.e., leakage current performance, of high-voltage loads. When leakage occurs in the high-voltage load, the leakage current sensor will sound an alarm, indicating that a leakage fault has occurred in the high-voltage load.

[0003] In existing documents, patent application number CN202221715375.2 discloses a metering type B leakage protection combined current transformer, including a leakage protection current transformer part, a metering current transformer part, an L-pole primary line and an N-pole primary line. The leakage protection current transformer part is stacked on top of the metering current transformer part and fixedly connected. The leakage protection current transformer part includes a leakage protection current transformer shell and a leakage protection magnetic core disposed in the leakage protection current transformer shell. The metering current transformer part includes a metering current transformer shell and a metering magnetic core disposed in the metering current transformer shell. The L-pole primary line passes through the inner ring of the leakage protection magnetic core, and the N-pole primary line passes through the inner ring of the leakage protection magnetic core and the metering magnetic core.

[0004] However, the connection terminals of existing combined current transformers need to be connected to the circuit board inside the sensor via connectors. This connection method, in order to accommodate the connectors, adds extra space occupied by the housing. Therefore, it is necessary to improve this structure to overcome the aforementioned drawbacks. Utility Model Content

[0005] The purpose of this invention is to provide an integrated leakage current sensor to solve the problem that existing current transformers require a large housing space to accommodate terminal connectors.

[0006] The above-mentioned technical objective of this utility model is achieved by the following technical solution:

[0007] An integrated leakage current sensor includes a sensor housing, which comprises an upper housing and a lower housing. The upper housing is disposed on the lower housing, and the upper and lower housings together form a receiving cavity. A positioning part and a positioning block are disposed inside the lower housing. The first end of the positioning part is connected to the inner wall of the lower housing, and the second end of the positioning part extends to the outside of the lower housing. The first end of the positioning block is connected to the inner wall of the lower housing, and the second end of the positioning block extends to the outside of the lower housing. A printed circuit board is also disposed inside the lower housing. The printed circuit board is mounted inside the lower housing through the cooperation of the positioning part and the positioning block. The printed circuit board is also provided with multiple mounting slots, and connection terminals are disposed in the mounting slots.

[0008] A further feature of this invention is that the printed circuit board has positioning holes that match the positioning part, and the printed circuit board also has positioning grooves that match the positioning block.

[0009] A further feature of this invention is that the upper housing has several through holes, which penetrate the upper housing and communicate with the interior of the upper housing, and one end of the connecting terminal extends through the through holes to the outside of the upper housing.

[0010] A further feature of this invention is that the upper housing is also provided with a primary test wire L and a primary test wire N.

[0011] A further feature of this invention is that a connector baffle is provided between the primary test wire L and the primary test wire N.

[0012] A further feature of this invention is that the upper housing and the lower housing are connected by a snap-fit ​​mechanism.

[0013] A further feature of this invention is that the connecting terminals are soldered and fixed to the printed circuit board.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. Compact structure: By using the upper and lower housings to form a cavity and cleverly utilizing the positioning part and positioning block to install the printed circuit board, the entire sensor structure is more compact and the space occupied is reduced.

[0016] 2. Easy installation: The connection terminals are directly soldered onto the printed circuit board and connected to the outside through the channels reserved in the housing. There is no need to set up an additional terminal mounting and fixing structure on the housing, which reduces the assembly difficulty and cost.

[0017] 3. Stable connection: Compared with the traditional plug-in or screw fixing method, the welding fixing method has higher connection stability and reliability, reducing the risk of failure caused by loose or detached terminals.

[0018] 4. Easy maintenance: The upper and lower housings are connected by a snap-fit ​​mechanism, eliminating the need for additional fasteners and making it easier to maintain and replace parts.

[0019] 5. High safety: A connector baffle is provided between the primary test wires L and N, providing electrical isolation between the live wire and the neutral wire, effectively preventing the risk of electric shock and short circuit. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of the lower shell of this utility model.

[0022] Figure 3 This is a schematic diagram of the printed circuit board structure of this utility model.

[0023] Numerical labels: 1. Upper housing; 2. Lower housing; 3. Positioning part; 4. Positioning block; 5. Printed circuit board; 6. Mounting slot; 7. Connecting terminal; 8. Positioning hole; 9. Positioning groove; 10. Through hole; 11. Primary test wiring L; 12. Primary test wiring N; 13. Connector baffle. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with the illustrations and specific embodiments.

[0025] like Figures 1 to 3 As shown, the present invention proposes an integrated leakage current sensor, including a sensor housing, which includes an upper housing 1 and a lower housing 2. The upper housing 1 is disposed on the lower housing 2, and the upper housing 1 and the lower housing 2 together form a receiving cavity. The lower housing 2 is provided with a positioning part 3 and a positioning block 4. The first end of the positioning part 3 is connected to the inner wall of the lower housing 2, and the second end of the positioning part 3 extends to the outside of the lower housing 2. The first end of the positioning block 4 is connected to the inner wall of the lower housing 2, and the second end of the positioning block 4 extends to the outside of the lower housing 2. The lower housing 2 is also provided with a printed circuit board 5, which is installed in the lower housing 2 through the cooperation of the positioning part 3 and the positioning block 4. The printed circuit board 5 is also provided with a plurality of mounting slots 6. The first end of the connecting terminal 7 is located in the mounting slot 6, and the second end of the connecting terminal 7 extends to the outside of the sensor housing.

[0026] Compared to existing technologies that use connectors on the sensor housing for terminal mounting, this invention uses a mounting slot 6 on the printed circuit board 5 to accommodate the connecting terminal 7. The connecting terminal 7 is fixed by soldering and passes through the sensor housing to communicate with the outside. This eliminates the need for additional terminal mounting structures on the housing, reducing the space occupied by the housing. Since the connecting terminal 7 is directly soldered to the printed circuit board 5 and communicates with the outside through the pre-reserved channel in the housing, the installation process is simpler and faster, reducing assembly difficulty and cost. Compared to traditional plug-in or screw fixing methods, the soldering fixing method has higher connection stability and reliability, reducing the risk of failure due to loose or detached terminals.

[0027] The printed circuit board 5 has positioning holes 8 that match the positioning part 3, and the printed circuit board 5 also has positioning grooves 9 that match the positioning block 4. Through the cooperation of the positioning holes 8 and the positioning block 4, the precise alignment of the printed circuit board 5 during the installation process can be ensured, avoiding circuit connection problems caused by installation deviation. The locking structure of the positioning holes 8 and the positioning block 4 can increase the connection strength between the printed circuit board 5 and the lower housing 2, prevent the circuit board from shifting under vibration or impact environment, and ensure the stable operation of the circuit.

[0028] The upper housing 1 has several through holes 10. The through holes 10 pass through the upper housing 1 and communicate with the interior of the upper housing 1. One end of the connecting terminal 7 extends through the through hole 10 to the outside of the upper housing 1. The design of the through hole 10 allows the connecting terminal 7 to easily pass through the upper housing 1 and make electrical connections with external circuits or devices without the need for additional connectors or fasteners.

[0029] The upper housing 1 is also provided with a primary test line L11 and a primary test line N12. The main function of the primary test lines L11 and N is to provide a stable power input for the sensor. The primary test line L11 is responsible for transmitting current, while the primary test line N12 serves as a current loop. The arrangement of the primary test lines L11 and N makes it easier to connect the sensor to an external power source without the need for additional connectors or terminals, thus reducing the complexity of installation and maintenance.

[0030] A connector baffle 13 is provided between the primary test wire L11 and the primary test wire N12. The connector baffle 13 is used to provide electrical isolation between the live wire and the neutral wire, which can effectively prevent accidental contact between the live wire and the neutral wire during wiring or maintenance, thereby reducing the risk of electric shock and short circuit and improving the safety of the equipment.

[0031] The upper housing 1 and the lower housing 2 are connected by a snap-fit ​​connection. Snap-fit ​​connections typically do not require additional fasteners and are easier to disassemble than screw connections, making equipment maintenance and component replacement more convenient.

[0032] In summary, the integrated leakage current sensor achieves a compact structure by integrating the sensor housing and internal components. The mounting slot design on the printed circuit board allows the connection terminals to be directly soldered onto the circuit board and connected to the outside through the channels reserved in the housing, eliminating the need for additional terminal mounting and fixing structures on the housing, thereby reducing the space occupied by the housing.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0034] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated leakage current sensor, comprising a sensor housing, the sensor housing including an upper housing and a lower housing, characterized in that, The upper housing is mounted on the lower housing, and the upper and lower housings together form a receiving cavity. The lower housing is provided with a positioning part and a positioning block. The first end of the positioning part is connected to the inner wall of the lower housing, and the second end of the positioning part extends to the outside of the lower housing. The first end of the positioning block is connected to the inner wall of the lower housing, and the second end of the positioning block extends to the outside of the lower housing. The lower housing is also provided with a printed circuit board. The printed circuit board is installed in the lower housing through the cooperation of the positioning part and the positioning block. The printed circuit board is also provided with multiple mounting slots, and the mounting slots are provided with connection terminals.

2. The integrated leakage current sensor according to claim 1, characterized in that, The printed circuit board has positioning holes that match the positioning part, and the printed circuit board also has positioning grooves that match the positioning block.

3. The integrated leakage current sensor according to claim 1, characterized in that, The upper housing has several through holes that penetrate the upper housing and communicate with its interior. One end of the connecting terminal extends through the through hole to the outside of the upper housing.

4. The integrated leakage current sensor according to claim 1, characterized in that, The upper housing is also equipped with a primary test line L and a primary test line N.

5. The integrated leakage current sensor according to claim 4, characterized in that, A connector baffle is provided between the primary test connection L and the primary test connection N.

6. The integrated leakage current sensor according to claim 1, characterized in that, The upper and lower housings are connected by a snap-fit ​​mechanism.

7. The integrated leakage current sensor according to claim 1, characterized in that, The connecting terminals are soldered and fixed to the printed circuit board.

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