CN2876787Y - Current inductor - Google Patents

Abstract

A current sensor includes a C-shaped magnetic core, a notch of which is buckled on a printed circuit board so that the magnetic core is arranged perpendicular to the printed circuit board, and the printed circuit board can extend the length of the inner surface of the magnetic core to provide good support for the magnetic core and increase the welding area to facilitate welding operation. The front bend of the magnetic core is aligned with a Hall sensor element, and the Hall sensor element is welded to an electronic circuit, thereby achieving the beneficial effects of fast assembly and easy and firm welding.

Description

current sensor

technical field

The utility model provides a current sensor, especially a current sensor for converting the current flowing through the coil into a voltage through a magnetic core and a Hall induction element. The notch of the C-shaped magnetic core is directly buckled on the printed circuit board. Strong and relatively easy to implement current sensors.

Background technique

The main purpose of the current sensor is to convert the magnetic field into a voltage, and then use the electronic circuit to amplify the voltage into a controllable output voltage. Regarding the current sensor, there is also a customary "current converter". Please refer to Figure 1 for its diagram , which is a schematic plan view of a conventional current converter. The conventional current converter has a flat structural design and is mainly composed of a supporting printed circuit board 1, a magnetic core 2, a coil 3, a Hall sensing element 4, and a connecting terminal 6. , the printed circuit board 1 is provided with an electronic circuit, and the coil 3 is looped on the magnetic core 2, and the two ends 7 of the coil 3 extend to the outside of the printed circuit board 1 to provide connection and assembly to other printed circuit boards. In addition, the Hall sensor The component 4 and the electronic circuit 5 are also located on the same plane on the printed circuit board 1, and the number of connecting terminals 6 also extends to the outer periphery of the printed circuit board 1, and its function is similar to that of the two ends 7 of the coil as connecting external circuits or grounding, because The magnetic core 2 is made of several C-shaped plates stacked and fixed, and the magnetic core 2 is provided with a soldering groove 2a, and the printed circuit board 1 is drilled with solder joints for the groove 2a of the magnetic core 2 The welding hole 1a of the magnetic core 2 is welded and fixed by aligning the welding hole 1a with the groove hole 2a of the magnetic core 2 .

But, its above-mentioned known electric current converter still has following deficiency:

1. In order to fix the C-shaped magnetic core 2 in the known current converter, solder holes 1a need to be drilled on the printed circuit board 1, which increases the cost and slows down the manufacturing speed.

2. The C-shaped magnetic core 2 of the known current converter is placed flat on the printed circuit board 1, so there are dead spots in the welding and it is difficult to weld, or it is difficult to weld and it is difficult to weld.

3. The known current converter needs to adjust its position during welding to be able to do accurate welding, which causes the inconvenience of welding and the difficulty of processing, which is its deficiency.

In view of the problems existing in the above-mentioned known structures, how to develop a more ideal and practical innovative structure is what consumers are eagerly looking forward to, and it is also the goal and direction that related companies must work hard to develop breakthroughs.

In view of this, the creator has been engaged in the manufacture, development and design of related products for many years. After detailed design and careful evaluation for the above-mentioned goals, a practical utility model is finally obtained.

new content

The purpose of this utility model is to provide a kind of electric current sensor, and its C-type magnetic core notch directly buckles the printed circuit board, and makes its printed circuit board need not drill to set up welding hole, accelerates the manufacturing speed; And its magnetic core position, The printed circuit board is extended to the inside of the core to form a solid support.

The structure of the utility model: a current sensor is composed of a printed circuit board with an electronic circuit, a magnetic core wound with a coil, a Hall induction element and a connecting terminal that form a circuit connection with the printed circuit board; the magnetic core is a C-shaped shape, which includes an inner groove, a notch and a forward bend, characterized in that:

At the position where the printed circuit board is used for assembling the magnetic core, there is an extension plate protruding horizontally. The length of the extension plate extends at the deep part of the inner groove of the magnetic core. The notch of the magnetic core is embedded in the extension plate of the printed circuit board. The magnetic core is vertically located on the printed circuit board, and the bottom surface of the inner groove of the magnetic core is attached to the back of the printed circuit board, and the front bending part of the magnetic core is aligned with the Hall inductive element.

Wherein, the magnetic core has wires for soldering to a printed circuit board.

Beneficial effects of the utility model: the utility model is a current sensor, which needs to drill welding holes on the printed circuit board first, and then place the magnetic core on the printed circuit board, and align the soldering points with the printed circuit board. In the soldering process of the soldering hole of the circuit board, because the soldering position is narrow, it is easy to have a dead angle, and it is not easy to solder firmly, the overall construction is difficult, the manufacturing process is slow, and the yield is also low. The utility model directly converts the C-type The notch of the magnetic core is snapped into the printed circuit board. The printed circuit board provides support and a large area of soldering surface, which can easily and firmly solder the magnetic core. The overall manufacturing process is fast and the yield rate is high, and the production cost can be reduced.

About technology, means and effect thereof that the present utility model adopts, hereby cite a preferred embodiment and cooperate drawing in detail in the back, believe that the above-mentioned purpose of the present utility model, structure and feature, when can be able to deepen and specifically by it learn.

Description of drawings

Figure 1: A schematic plan view of a conventional current converter.

Fig. 2: A three-dimensional exploded schematic diagram of a preferred embodiment of the utility model.

Fig. 3: A three-dimensional schematic diagram of a preferred embodiment of the utility model.

Fig. 4: a schematic diagram of a rear view of a preferred embodiment of the utility model.

Detailed ways

The utility model provides a current inductor design which is easier to weld and more firmly welded.

In order to enable the examiner to have a further understanding and understanding of the purpose, features and functions of this utility model, please provide a brief description in conjunction with the drawings as follows:

Referring to shown in Fig. 2, the three-dimensional exploded schematic view of one of the preferred embodiments of the utility model, its current inductor (or current transformer) of the utility model is a flat structural design, and it is mainly composed of a printed circuit board 10. C-shaped magnetic core 20, coil 30, Hall induction element 40, connecting terminal 50 and other components, the printed circuit board 10 is provided with an electronic circuit 11, and the coil 30 is wound on the C-shaped magnetic core 20, The two ends 31 of the coil 30 extend to the outside of the printed circuit board 10 to provide connection and assembly to other printed circuit boards. In addition, the Hall inductive element 40 and the electronic circuit 11 are also located on the same plane on the printed circuit board 10, and the number of connecting terminals 50 It also extends to the outer periphery of the printed circuit board 10, and its function is similar to that of the two ends 31 of the coil 30 used to connect the external circuit. The C-shaped magnetic core 20 is formed by stacking and fixing several C-shaped plates to form a There is an inner groove 21, a notch 22 and a front bend 23 formed by the C-shaped magnetic core 20 at the notch 22, and the printed circuit board 10 is provided with an extension plate 12 at the position where the C-shaped magnetic core 20 is assembled, and the length of the extension plate 12 is Go deep into the deep part of the inner groove 21 of the C-shaped magnetic core 20 .

Please cooperate with Fig. 3 and Fig. 4, the electronic circuit 11 on the printed circuit board 10 is completed first, and the Hall sensing element 40 and the electronic circuit 11 are also located on the printed circuit board 10 to form a circuit conduction and connection. The terminal 50 also extends to the printed circuit board 10 to form a conduction, and the coil 30 circles on the C-shaped magnetic core 20. The notch 22 of the C-shaped magnetic core 20 can be embedded in the extended plate 12 of the printed circuit board 10, and The bottom surface 211 of the inner slot 21 of the C-shaped magnetic core 20 is attached to the back of the printed circuit board 10 , so that the C-shaped magnetic core 20 is vertically embedded on the horizontal printed circuit board 10 . After the C-shaped magnetic core 20 is embedded, the back side of the printed circuit board 10 is welded with the side wall 24 of the C-shaped magnetic core 20 (as shown in Figure 4 ), and the front curved portion 23 of the C-shaped magnetic core 20 is just right. Facing the Hall inductive element 40 (as shown in Figure 3), to complete a welded part, because the area is quite wide and easy to weld, and also quite firm after welding, the yield rate is high, and its C-shaped magnetic core 20 can also be Soldering to the printed circuit board 10 through wires 25;

Through the above-mentioned structure, the current sensor of the present invention can be manufactured rapidly, combined firmly, with high yield rate and reduced cost.

The fact that the utility model effect increases is as follows:

1. Provide an innovative structural type of current inductor, which can avoid drilling welding holes, and can quickly assemble the magnetic core, and its magnetic core can be welded quickly and firmly, and the processing yield can be improved, while the cost can be reduced Reduced, the utility model has neither been published nor publicly used, and meets the novelty factor.

2. According to the improved structural design, when the C-shaped magnetic core is used on the component to snap into the printed circuit board, the front bending part can be aligned with the Hall induction element, and there is a large area between the magnetic core and the printed circuit board. Welding space, so that it can be easily welded and welded firmly, and can avoid drilling welding holes, which greatly improves the process speed and improves the yield rate. The utility model is progressive.

It can be seen from the above that the current sensor of the present utility model is indeed the first in the industry and conforms to the novelty elements of the new patent, and its comprehensive innovative design conforms to the progressive elements of the new patent, and its assembly is fast and the cost is reduced. In line with better industrial utilization.

The foregoing descriptions specifically describe the technical features of the utility model for the preferred embodiments of the utility model; however, those who are familiar with this technology can change and modify the utility model without departing from the spirit and principles of the utility model. And these changes and modifications should all be covered in the scope defined by the patent scope of this application.

To sum up, the utility model provides a current sensor, which has indeed achieved all the purposes of the utility model, and the spatial pattern of its combined structure has not been seen in similar products, nor has it been disclosed before the application, which is in line with the patent law According to the regulations, an application is filed in accordance with the law.

Claims (2)

1. current inductor, by the printed circuit board (PCB) with electronic circuit, be wound with coil magnetic core, form hall sensing element and the splicing ear that circuit is connected with printed circuit board (PCB) and formed; This magnetic core is a C shape profile, and it comprises an inside groove, breach and a preceding turn of bilge, it is characterized in that:

This printed circuit board (PCB) is used to assemble the position of magnetic core, level is extended with one and extends plate, this extension board leaf length extends in place, magnetic core inside groove deep, the breach of this magnetic core is embedded on the extension plate of printed circuit board (PCB), magnetic core vertically is positioned on the printed circuit board (PCB), and groove bottom abuts in the printed circuit board (PCB) back side in the magnetic core, and the preceding turn of bilge of this magnetic core and hall sensing element align.

2. according to the described current inductor of claim 1, it is characterized in that: this magnetic core has the lead that is used to be soldered to printed circuit board (PCB).

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