CN203870143U - Current sensor - Google Patents

Abstract

The utility model provides a current sensor, which includes a magnetic core package and a circuit board package plugged on the magnetic core package. The magnetic core package includes an internal magnetic core component and a first molded outside. A sealed enclosure, the circuit board package includes an internal circuit board assembly and a second sealed enclosure molded outside it, the second sealed enclosure is plugged into the first sealed enclosure, and on the second sealed enclosure There are signal leads. In this scheme, the current sensor adopts a pluggable and convenient assembly method. The magnetic core package and the circuit board package are respectively integrated modules. When installing, the two modules can be inserted together, and the installation and disassembly are very convenient. , which solves the problems of low integration and cumbersome assembly of components of the current sensor in the prior art, breaks through the existing traditional assembly method, and adopts a plug-in assembly method, which is a highly integrated and modular production , Easy to install current sensor.

Description

a current sensor

technical field

The utility model relates to a current detection device, in particular to a current sensor with simple structure and convenient assembly.

Background technique

The current sensor is a detection device that can sense the information of the measured current, and can convert the information sensed by the detection into an electrical signal that meets certain standards or other required forms of information output according to certain rules, so as to meet the Information transmission, processing, storage, display, recording and control requirements. At present, the current sensor is mainly a Hall element in the magnetic circuit, after detecting the magnetic flux proportional to the primary current, the output Hall voltage signal, the signal is amplified by the amplifier circuit, because the signal is proportional to the primary current signal Linear proportional relationship, so the primary current signal can be obtained through calculation, and then sent to the instrument or computer for display.

The main components of existing current sensors include magnetic cores, PCB board components, casings, and sealing devices. At present, most of the products are manually assembled on the production line. Due to the bottleneck of traditional processing technology, it is difficult to realize the integration of various parts, so each part needs to be processed separately and then assembled. However, manual assembly not only has low efficiency and poor consistency, but also has the risk of chemical substances such as potting glue harming the health of employees due to the complexity of the potting process.

In order to minimize the above-mentioned manual assembly problems, Chinese patent document CN201298052Y discloses a current sensor, which includes a bottom plate, a frame containing an iron core, a busbar and a circuit board, and the iron core is fixed in the frame by injection molding. Although this scheme adopts the integrated injection molding method of iron core and skeleton, which simplifies the assembly steps, but in this scheme, the circuit board, busbar, bottom plate and outer cover still need to be installed separately during assembly, and this scheme still has parts. The problem of low integration and cumbersome assembly.

Utility model content

Therefore, the technical problem to be solved by the utility model lies in the problems of low integration of components and cumbersome assembly in the current sensor in the prior art, so a current sensor with high integration, modularization, and convenient and simple installation is proposed.

In order to solve the above technical problems, the utility model provides a current sensor including a magnetic core package and a circuit board package plugged on the magnetic core package, the magnetic core package includes a magnetic core assembly and a molded The first sealing shell outside the magnetic core assembly, the circuit board package includes a circuit board assembly and a second sealing shell formed outside the circuit board assembly, the second sealing shell is plugged into the first sealing In the housing, a signal lead-out terminal is provided on the second sealed housing.

Further preferably, the first sealing shell and the second sealing shell are respectively formed with buckling parts that cooperate with each other.

Further preferably, the magnetic core assembly is a ring magnet with a gap, the first sealing shell is packaged outside the magnetic core assembly, and a snap-in slot for accommodating the circuit board package is formed at the gap.

Further preferably, a bump is formed on the second sealing shell, a step matching the bump is formed in the engagement groove of the first sealing shell, and the second sealing shell is inserted into the first sealing shell. When the casing is sealed, the protrusion is against the step.

Further preferably, the protrusion of the second sealed casing is further provided with an elastic clamping part, the inner wall of the clamping groove of the first sealed casing is provided with a bayonet, and the elastic clamping part is formed with a When the first sealing shell and the second sealing shell are snapped together, the projections extend into the bayonet socket for snap-fitting.

Further preferably, the elastic clamping part is further provided with a detachment end, and when the detachment end is pressed, the protrusion of the elastic clamping part is separated from the bayonet socket. the

Further preferably, the magnetic core assembly and the first sealing shell are injection molded.

Further preferably, the circuit board assembly and the second sealed casing are injection molded.

Further preferably, the circuit board assembly is a PCB board assembly.

Further preferably, the PCB assembly includes a Hall element, an amplification processing circuit and a signal line.

Compared with the prior art, the above-mentioned technical solution of the utility model has the following advantages,

(1) The utility model provides a current sensor, including a magnetic core package and a circuit board package plugged on the magnetic core package. The magnetic core package includes an internal magnetic core component and a first molded outside. A sealed shell, the circuit board package includes an internal circuit board assembly and a second sealed shell molded on its outside, the second sealed shell is plugged into the first sealed shell, and there is a Signal terminal. In this solution, the current sensor is designed in a pluggable way, which is simple and convenient to assemble. The magnetic core package and the circuit board package are respectively integrated modules, and the two modules can be mated and inserted during installation, which is very convenient for installation and disassembly, and solves the problem of low integration of components of the current sensor in the prior art , The problem of cumbersome assembly, this solution breaks through the existing traditional assembly method, the previous parts are formed into two modules through mold molding, and the plug-in assembly method is adopted, which is a highly integrated and modularized A current sensor that is convenient and simple to produce and install. In addition, the current sensor in this solution is easy to operate during assembly, high in efficiency, good in consistency, easy to repair, does not require auxiliary assembly of chemicals, and is safe and environmentally friendly.

(2) In the current sensor described in the present utility model, the first sealed shell and the second sealed shell are respectively formed with buckle parts that cooperate with each other, which further strengthens the insertion of the magnetic core package and the circuit board package. stability.

(3) The current sensor described in the utility model has a clamping groove formed on the first sealed casing, and there are steps in the groove, and there is a bump on the second sealed casing. After the second sealed casing is inserted into the first sealed casing, The bump can be against the step, so that the fixing during insertion is realized, and the assembly of the magnetic core package and the circuit board package is realized.

(4) In the current sensor described in the present utility model, the protrusion of the second sealed casing is also provided with an elastic clamping part, and the inner wall of the clamping groove of the first sealed casing is provided with a bayonet. A protrusion cooperating with the bayonet socket is formed on the clamping part, and when the first sealing shell and the second sealing shell are clamped together, the protrusion extends into the bayonet socket for clamping connection. In order to further enhance the fixing effect of the magnetic core package and the circuit board package after assembly, a bayonet socket is provided on the first sealed shell, and a protrusion is provided on the elastic clamping part of the second sealed shell. The cooperation with the buckle further strengthens the firmness after insertion.

(5) In the current sensor described in the present utility model, the elastic clamping part is further provided with a split end, and when the split end is pressed, the protrusion of the elastic clamping part is separated from the bayonet socket. In order to facilitate disassembly, a split end that can be pressed is provided on the elastic clamping part. After pressing, the protrusion and the bayonet are separated. At this time, the magnetic core package and the circuit board package can be easily separated to complete the disassembly of the product. .

(6) In the current sensor described in the present invention, the magnetic core assembly and the first sealed shell are injection molded. In this way, the notch of the magnetic core is completely sealed, which effectively prevents the notch of the magnetic core from rusting, and the magnetic core assembly is positioned by the mold, with good consistency and high precision.

(7) In the current sensor described in the present invention, the circuit board assembly and the second sealed casing are injection molded. In this way, the components of the circuit board assembly are completely sealed, effectively preventing the external environment from corroding the components, and the mold forming ensures its consistency and reliability.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be described in further detail below according to specific embodiments of the utility model in conjunction with the accompanying drawings, wherein

Fig. 1 is the assembly structure schematic diagram of the electric current sensor described in the utility model in the embodiment;

Fig. 2 is the structural diagram of the first sealed shell of current sensing described in the utility model;

Fig. 3 is the structural diagram of the second sealed shell of current sensing described in the utility model;

Fig. 4 is the plug assembly schematic diagram of the electric current sensor described in the utility model;

Fig. 5 is a partial enlarged view of the plug-in part A in Fig. 4.

The reference numerals in the figure are represented as: 1-magnetic core package, 11-magnetic core assembly, 12-first sealed shell, 13-clamping slot, 14-step, 15-bayonet, 2-circuit board package, 21-circuit board assembly, 22-second sealing shell, 23-bulge, 24-elastic clamping part, 25-protrusion, 26-split end, 3-signal lead-out end.

Detailed ways

Example 1:

This embodiment provides a current sensor, as shown in FIG. 1 , which includes two parts: a magnetic core package 1 and a circuit board package 2 , and the circuit board package 2 is plugged on the magnetic core package 1 . The current sensor is composed of two parts, the magnetic core package 1 and the circuit board package 2, which are plugged and snapped together, and only need to be inserted during assembly, and can be disassembled without damage, which is convenient for repair and material reuse.

A magnetic core assembly 11 and a first packaging shell 12 are integrated in the magnetic core package 1 , and the first sealing shell 12 is molded and packaged outside the magnetic core assembly 11 . The first sealed casing 12 can be a rubberized casing, and the plasticized casing and the magnetic core assembly 11 are injection molded, so that the gap of the magnetic core is completely sealed, effectively preventing the gap of the magnetic core from rusting, and the magnetic core assembly 11 is positioned by a mould. Good consistency and high precision.

A circuit board assembly 21 and a second sealed casing 22 formed outside the circuit board assembly 21 are integrated in the circuit board package 2 . The circuit board assembly is a PCB board assembly, and the PCB board assembly includes a Hall element, an amplification processing circuit, a signal line, etc., and realizes the detection of the primary side voltage and obtains a corresponding detection current through calculation. The second sealing shell 22 can also be a rubber-coated buckle element, and the circuit board assembly 21 and the rubber-coated buckle element are injection-molded to completely seal the components of the circuit board assembly 21, effectively preventing the external environment Corrosion of components, mold molding to ensure its consistency and reliability. A signal lead-out terminal 3 is provided on the second sealed casing 22 for leading out the signal detected by the current sensor.

The magnetic core package 1 and the circuit board package 2 are assembled in a pluggable manner, the second sealed shell 22 is plugged into the first sealed shell 12, and a container is arranged on the first sealed shell 12. The space of the second sealing shell 22 realizes the plug-in connection of these two components. For example, an accommodating groove can be formed in the first sealed casing 12 , and the accommodating groove is adapted to the external structure of the second sealed casing 12 so that the second sealed casing 12 can be inserted into the first sealed casing 12 .

The current sensor works in the same way as the traditional one. The Hall element detects the magnetic flux proportional to the primary current in the aggregated magnetic circuit and then outputs the Hall voltage signal, which is amplified and processed by the amplifier circuit to obtain the corresponding current. The size is sent to the instrument display or through the computer and other equipment to intuitively reflect the current size of the area to be measured.

In this solution, the current sensor is designed in a pluggable way, which is convenient for assembly. The magnetic core package 1 and the circuit board package 2 are respectively integrated modules, and the two modules can be mated and inserted during installation, which is very convenient for installation and disassembly, and solves the problem of component integration of current sensors in the prior art The problem of low density and cumbersome assembly, this solution breaks through the existing traditional assembly method, and the previous parts are formed into two modules through mold forming, and the plug-in assembly method is used to provide a high integration, Modular production, convenient and simple current sensor installation. In addition, the current sensor in this solution is easy to operate during assembly, high in efficiency, good in consistency, easy to repair, does not require auxiliary assembly of chemicals, and is safe and environmentally friendly.

Further, in order to ensure the insertion stability of the magnetic core package 1 and the circuit board package 2 , mutually matching buckle parts can also be formed on the first sealed shell 12 and the second sealed shell 22 .

Example 2:

The current sensor in this embodiment also includes two parts: a magnetic core package 1 and a circuit board package 2 , and the circuit board package 2 is pluggably plugged on the magnetic core package 1 . Same as Embodiment 1, the magnetic core assembly 11 is integrated in the magnetic core package 1 and the first packaging shell 12 is packaged and molded on its outside, and the circuit board assembly 21 is integrated in the circuit board package 2 and molded on the circuit board. A second hermetically sealed enclosure 22 outside the assembly 21 . In this embodiment, the magnetic core assembly 11 is a ring magnet with a gap, and the first sealed casing 12 is packaged outside the magnetic core assembly 11 as shown in FIG. The clipping groove 13 of the circuit board package 2 is described above, and a step 14 is formed in the clipping groove 13 . At the same time, conventional outer contour structures such as mounting holes and reinforcing ribs are formed on the first sealed casing 12 . The structure of the second sealed casing 22 is shown in FIG. 3 , corresponding to the step 14 of the first sealed casing 12 , and a bump 23 is formed on the second sealed casing 22 , and the snap of the first sealed casing 12 The step 14 formed in the connecting groove 13 cooperates with the protrusion 23 and can support each other. When the second sealed casing 22 is inserted into the first sealed casing 12 , the protrusion 23 abuts against the step 14 , and the inserted state is shown in FIG. 4 . In this way, the positioning and fixing during insertion are realized. After the magnetic core package 1 and the circuit board package 2 are assembled and plugged, the two components can support and fix each other, which facilitates the positioning during assembly.

Example 3

As a further embodiment, the current sensor in this embodiment, on the basis of the above-mentioned embodiment 2, is also provided with an elastic clamping part 24 on the protrusion 23 of the second sealed casing 22, and the first sealing A bayonet 15 is provided on the inner wall of the bayonet groove 13 of the shell 12, and a protrusion 25 is formed on the elastic bayonet part 24 to cooperate with the bayonet 15. The first sealed shell 12 and the second sealed shell 22 When clamping, the protrusion 25 extends into the bayonet 15 for clamping, as shown in Figure 4, the insertion part A, as shown in Figure 5, which is a partially enlarged schematic diagram of the insertion part A in Figure 4 . Through the clamping of the bayonet socket 15 and the protrusion 25 , further snap locking is achieved, so that the insertion of the magnetic core package 1 and the circuit board package 2 is more secure. In addition, other ways in the prior art, such as locking bolts, can also be used to achieve a further strengthening effect after insertion.

In this embodiment, in order to further strengthen the fixing effect after the assembly of the magnetic core package 1 and the circuit board package 2, a bayonet 15 is provided on the first sealed shell 12, and an elastic clamping part 24 of the second sealed shell 22 is provided. Protrusions 25 are provided on the top, and the cooperation between the bayonet 15 and the protrusions 25 can further strengthen the connection firmness of the two pluggable parts after they are plugged together.

Further, for the convenience of disassembly, a detachable end 26 that can be pressed is provided on the elastic clamping part 24, as shown in Figure 3 and Figure 5, the pressing end 26 is arranged at one end of the elastic clamping part 24, such as being arranged near When one side or two sides of the open end of the top is pressed, the elastic clamping part 24 moves, so that the protrusion 25 of the elastic clamping part 24 is separated from the bayonet socket 15 . After pressing, the protrusion 25 is separated from the bayonet socket 15, which facilitates the separation of the magnetic core package 1 and the circuit board package 2, thereby completing the disassembly of the product, so that the disassembly of the magnetic core package 1 and the circuit board package 2 becomes easier. Very easy, simple and fast.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (10)

1. a current sensor, it is characterized in that, comprise magnetic core packaging part (1) and be plugged on the circuit board package part (2) on described magnetic core packaging part (1), described magnetic core packaging part (1) comprises core assembly (11) and is molded over outside the first can (12) of described core assembly (11), described circuit board package part (2) comprises circuit board assemblies (21) and is molded over outside the second can (22) of this circuit board assemblies (21), described the second can (22) is plugged in described the first can (12), on described the second can (22), be provided with signal exit.

2. current sensor according to claim 1, is characterized in that, on described the first can (12) and described the second can (22), forms respectively the snap part cooperatively interacting.

3. current sensor according to claim 1, it is characterized in that, described core assembly (11) is for having the ring-shaped magnet of gap, and described the first can (12) is encapsulated in described core assembly (11) outside and at this opening position, forms the buckling groove (13) of accommodating described circuit board package part (2).

4. current sensor according to claim 3, it is characterized in that, on described the second can (22), form projection (23), in the buckling groove (13) of described the first can (12), form the step (14) coordinating with described projection (23), when described the second can (22) is pegged graft into described the first can (12), described projection (23) props up described step (14).

5. current sensor according to claim 4, it is characterized in that, on the projection (23) of described the second can (22), be also provided with flexible clamping portion (24), on buckling groove (13) inwall of described the first can (12), be provided with bayonet socket (15), in described flexible clamping portion (24), form the projection (25) coordinating with described bayonet socket (15), when described the first can (12) and the second can (22) clamping, described projection (25) stretches into the interior clamping of described bayonet socket (15).

6. current sensor according to claim 5, it is characterized in that, in described flexible clamping portion (24), be also provided with and split end (26), while pressing this fractionation end (26), the projection (25) of described flexible clamping portion (24) is separated with described bayonet socket (15).

7. according to arbitrary described current sensor in claim 1-6, it is characterized in that described core assembly (11) and described the first can (12) injection mo(u)lding.

8. according to arbitrary described current sensor in claim 1-6, it is characterized in that described circuit board assemblies (21) and described the second can (22) injection mo(u)lding.

9. current sensor according to claim 8, is characterized in that, described circuit board assemblies (21) is pcb board assembly.

10. current sensor according to claim 9, is characterized in that, described pcb board assembly comprises Hall element, amplification treatment circuit and signal wire.