Surface-stuck type magnetic element as well as manufacturing method and coil thereof

Abstract

The invention relates to a surface-stuck type magnetic element as well as a manufacturing method and a coil thereof, wherein the manufacturing method comprises the following steps of: (a) providing a magnetic conducting assembly and a coil, wherein the magnetic conducting assembly comprises a first magnetic conducting component and a second magnetic conducting component, the coil comprises a body and a plurality of pins formed by extending from the body, and each pin comprises a bent part and a contact part; and (b) assembling the magnetic conducting assembly and the coil, wherein the body of the coil is arranged between the first magnetic conducting component and the second magnetic conducting component of the magnetic conducting assembly, and the contact parts of the pins of the coil substantially substantially extend on the first magnetic conducting component and the second magnetic conducting component of the magnetic conducting assembly. The manufacturing method can avoid various known inconveniences caused by artificially bending the pins of the coil after the assembly of the magnetic conducting assembly and the coil and many problems of unfairness of the bent pins, uneven length and pin distance of the pins, overlarge bending amplitude and the like.

Description

technical field [0001] The invention relates to a manufacturing method and structure of a magnetic element, in particular to a manufacturing method of a surface-mounted magnetic element, a surface-mounted magnetic element and its coil. Background technique [0002] Magnetic components, such as inductors or transformers, are indispensable basic components in the operation of various electronic devices (such as power supply devices or power conversion devices). With the trend of miniaturization and high power design of power supply devices or power conversion devices, magnetic components also need to be developed towards miniaturization and flat structure. In addition, in order to facilitate disposing the magnetic components on the circuit board, various surface mount magnetic components in which the magnetic components are assembled on the circuit board by surface mount technology (SMT) have emerged as the times require. [0003] see Figure 1A and cooperate Figure 1B ,in ...

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Problems solved by technology

[0004] However, since the known surface mount magnetic element 1 is processed after the coil 11 and the magnetic permeable component 10 are assembled, if the pins 111 are bent by means of a jig (not shown), the magnetic permeable component 10 will It is easy to be damaged due to the pressure of the fixture, and the insulating layer outside the pin 111 of the coil 11 is also easily scratched, which will affect the product qualification rate of the surface mount magnetic component 1. Therefore, the manufacturing process of the known surface mount magnetic component is mostly The entire foot must be processed manually to avoid possible damage caused by bending the pin 111 with a jig

However, manually bending the pin 111 is not only time-consuming and manpower-consuming, but also difficult to control the bending range and flatness of the pin 111

like Figure 1B As shown, if the bending range of the bent portion 115 of the first pin 111a after bending is greater than the bending range of the bent portion 115 of the second pin 111b , relative to the bent portion 115 of the second pin 111b Not only may the size of the surface mount magnetic component 1 exceed the specification, but also the bent portion 115 of the first pin 111a may touch when the surface mount magnetic component 1 is placed on a circuit board (not shown). The proximity of electronic components on the circuit board can affect electrical safety

In addition, if the flatness of the first pin 111a and the second pin 111b after bending is not good, so that the first contact surface 112 for contacting the circuit board cannot be located on the same plane, the surface mount magnetic component 1 is disposed on When placed on the circuit board, problems such as tilting or height exceeding specification limits can also occur

[0005] In addition, generally speaking, the conventional coil 11 requires an additional step of cutting the pins 111 according to the matching magnetic permeable component 10 , but the pins 111 are prone to burrs after being cut and will interfere with the flatness of the pins 111 ; In addition, the coil 11 of the surface-mounted magnetic element 1 is mostly made of copper wire, and the area where the pin 111 is to be in contact with the c

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