Integrally-formed inductor

Abstract

The utility model relates to the field of inductance elements, and provides an integrally-formed inductor which comprises a first magnet, a coil conductor is arranged on the outer surface of the first magnet, PINs are fixedly connected to the two ends of the coil conductor, a second magnet wraps the outer surface between the first magnet and the coil conductor, and a base is connected to the outer surface of one end of the second magnet in a sleeved mode. The first magnet is completely wrapped by the second magnet, the base is matched with one end of the second magnet, and an insulating layer is arranged on the outer surface of the coil conductor; the PINs and the coil conductor are led out from the inside of the second magnet, holes for the PINs to penetrate through are reserved in the outer surface of the base, the outwards-protruding portion of the face, with the PINs, of the second magnet is a boss, the inner side cavity of the base is matched with the face, with the PINs, of the second magnet, and the problems that an existing inductor is low in working efficiency, poor in space utilization rate, poor in stability and the like are solved. The reliability is reduced due to the fact that several magnetic cores need to be adhered, and the magnetic shielding effect is poor due to the fact that coils are exposed outside.

Description

Technical Field

[0001] The utility model relates to the technical field of inductor components, and in particular to an integrally formed inductor. Background Art

[0002] Since there are many gaps between the parts of magnetic winding inductors and assembled inductors, there is a lot of space waste, and it is difficult to improve space utilization. Magnetic winding inductors need to be wound manually, which has low work efficiency and is not conducive to mass production. Assembled inductors require several parts of the magnetic core to be bonded together, and the reliability is reduced due to the presence of the bonding surface. The coils of both inductors are exposed to the air, which will cause part of the magnetic field to diverge into the surrounding environment, and the magnetic shielding effect is poor, which may cause interference to other surrounding components.

[0003] Therefore, an inductor with high saturation, high space utilization, high reliability and high electromagnetic shielding effect is needed. This patent proposes an integrated molded inductor to solve the above problems. Utility Model Content

[0004] The utility model provides an integrally formed inductor, which solves the problems mentioned in the background art that the existing inductor has low working efficiency, poor space utilization, requires several parts of the magnetic core to be bonded together resulting in reduced reliability, and the coil is exposed to the outside with poor magnetic shielding effect.

[0005] The technical solution of the utility model is as follows:

[0006] An integrally formed inductor comprises a first magnet, a coil conductor is arranged on the outer surface of the first magnet, PIN pins are fixedly connected to both ends of the coil conductor, a second magnet is wrapped on the outer surface between the first magnet and the coil conductor, and a base is sleeved on the outer surface of one end of the second magnet.

[0007] As a further technical solution of the utility model, the first magnet is completely wrapped by the second magnet, the base matches one end of the second magnet, and the outer surface of the coil conductor has an insulating layer.

[0008] As a further technical solution of the utility model, the PIN pin and the coil conductor are led outward from the inside of the second magnet, and a hole for the PIN pin to pass through is reserved on the outer surface of the base. The outwardly protruding part of the side of the second magnet with the PIN pin is a boss, and the inner cavity of the base matches the side of the second magnet with the PIN pin.

[0009] As a further technical solution of the utility model, the coil conductor is sleeved on the outer surface of the first magnet.

[0010] As a further technical solution of the utility model, the raw material of the first magnet is soft magnetic powder.

[0011] As a further technical solution of the present invention, the first magnet is a cylindrical structure.

[0012] As a further technical solution of the present invention, the first magnet is a "T"-shaped structure.

[0013] As a further technical solution of the utility model, the first magnet is an I-shaped structure.

[0014] The working principle and beneficial effects of the utility model are:

[0015] The one-piece molded inductor provided in the utility model has a closed magnetic circuit and good magnetic shielding. There is no gap between the magnet and the coil conductor, which greatly increases the space utilization rate. The product performance will not be affected by the vibration of different materials under high-frequency operation. The anti-vibration performance is better and the noise generated is also very low, which increases the reliability of the product. The design of the base has a supporting and protective function. While ensuring the stability of the inductor soldered on the PCB board, it ensures that the PIN foot insulation layer will not be inserted into the PCB board, and ensures a reasonable distance between the PCB board and the PIN foot insulation layer (internal copper wire), thereby improving the pressure resistance of the product and not affecting the heat dissipation of the inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0018] Figure 2 For this utility model Figure 1 Exploded diagram of

[0019] Figure 3 This is a partial structural explosion diagram of Example 3 of the utility model;

[0020] Figure 4 This is a partial structural explosion diagram of Example 4 of the utility model;

[0021] Figure 5 It is a partial side sectional view of the embodiment 5 of the utility model with a turn number of 2.75Ts;

[0022] Figure 6 It is a partial side sectional view of Example 5 of the utility model with a turn number of 3.75Ts.

[0023] In the figure: 1, first magnet; 2, coil conductor; 3, PIN pin; 4, second magnet; 5, base; 6, boss. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0025] like Figure 1-2 As shown, an integrally formed inductor includes a first magnet 1, a coil conductor 2 is provided on the outer surface of the first magnet 1, PIN pins 3 are fixedly connected to both ends of the coil conductor 2, a second magnet 4 is wrapped on the outer surface between the first magnet 1 and the coil conductor 2, and a base 5 is sleeved on the outer surface of one end of the second magnet 4.

[0026] The first magnet 1 is completely wrapped by the second magnet 4 , the base 5 matches one end of the second magnet 4 , and the outer surface of the coil conductor 2 has an insulating layer.

[0027] The PIN pin 3 and the coil conductor 2 are led outward from the inside of the second magnet 4. A hole is reserved on the outer surface of the base 5 for the PIN pin 3 to pass through. The outwardly protruding part of the side of the second magnet 4 with the PIN pin 3 is a boss 6. The inner cavity of the base 5 matches the side of the second magnet 4 with the PIN pin 3.

[0028] The coil conductor 2 is sleeved on the outer surface of the first magnetic body 1 .

[0029] The first magnet 1 is made of soft magnetic powder.

[0030] The first magnet 1 is a cylindrical structure.

[0031] In this embodiment, the coil conductor 2 adopts a wound 1.75Ts coil, and the coil is insulated, and the insulated coil conductor 2 is put on the first magnet 1. The first magnet 1 adopts an iron silicon magnetic powder core. The assembled coil conductor 2 and the first magnetic core are placed in a mold, and magnetic material is injected. The injected magnetic material is shaped by the mold and formed into a second magnet 4 after cooling. At this time, the second magnet 4 wraps the first magnet 1 and the coil conductor 2, and the first magnet 1 is completely wrapped by the second magnet 4. The two PIN pins 3 of the coil conductor 2 are exposed outside the second magnet 4. Finally, the base 5 is put on the motor exposed surface of the second magnet 4, and the base 5 is made of plastic. Example 2

[0032] Different from the first embodiment, the first magnet 1 is replaced with an iron-nickel magnetic powder core, in which case the loss of the obtained inductor can be lower. Example

[0033] like Figure 3 As shown, what is different from Example 1 or Example 2 is that the first magnet 1 is replaced with a T-shaped magnetic powder core, in which case the obtained inductor has a higher comprehensive magnetic permeability. Example 3

[0034] like Figure 4 As shown, different from Example 3, a cover plate is added to the T-shaped magnetic core structure of the first magnetic body 1 to form an I-shaped magnetic core structure. In this state, the obtained inductor can have a more complete magnetic circuit and improve the inductance value. Example 4

[0035] like Figure 5-6 As shown, the difference from any one of Embodiment 1, Embodiment 2, Embodiment 3 and Embodiment 4 is that the number of turns of the coil conductor 2 is increased to 2.75Ts or 3.75Ts, in which case the obtained inductor can have a higher inductance value.

[0036] In summary, the inductor provided by the utility model has a closed magnetic circuit and good magnetic shielding, so it will not interfere with surrounding components.

[0037] There is no gap between the magnet and the coil conductor 2, which greatly increases the space utilization rate. The coil conductor 2 is specially insulated to improve the reliability of the system. The inductor has no gaps, and the vibration of different materials at high frequency will not affect the product performance. It has better anti-seismic performance and generates low noise.

[0038] The magnetic core is made of materials with good characteristics and through special processes, which ensures that the inductor can maintain good performance even when used under high temperature and high current conditions;

[0039] The inductor has a boss 6 on the surface where the PIN pin 3 is led out. Since this surface is a plane, the boss 6 increases the thickness of the second magnet 4 at this location, thereby increasing the reliability of the product. The inductor device has a plastic base 5 on the surface where the PIN pin 3 is led out;

[0040] The design of the plastic base 5 has a supporting and protective function. While ensuring the stability of the inductor soldered on the PCB, it not only ensures that the insulating layer of the PIN pin 3 will not be inserted into the PCB, but also ensures a reasonable distance between the PCB and the insulating layer of the PIN pin 3 (internal copper wire), thereby improving the pressure resistance performance of the product;

[0041] Furthermore, the plastic base 5 does not completely cover the second magnet 4 , which will not affect the heat dissipation of the inductor.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrally formed inductor, characterized in that: The invention comprises a first magnet (1), wherein a coil conductor (2) is arranged on the outer surface of the first magnet (1), PIN pins (3) are fixedly connected to both ends of the coil conductor (2), a second magnet (4) is wrapped around the outer surface between the first magnet (1) and the coil conductor (2), and a base (5) is sleeved on the outer surface of one end of the second magnet (4).

2. The integrally formed inductor according to claim 1, wherein: The first magnet (1) is completely wrapped by the second magnet (4), the base (5) matches one end of the second magnet (4), and the outer surface of the coil conductor (2) is provided with an insulating layer.

3. The integrally formed inductor according to claim 2, wherein: The PIN pin (3) and the coil conductor (2) are led outward from the inside of the second magnet (4); a hole is reserved on the outer surface of the base (5) for the PIN pin (3) to pass through; the outwardly protruding portion of the side of the second magnet (4) with the PIN pin (3) is a boss (6); and the inner cavity of the base (5) matches the side of the second magnet (4) with the PIN pin (3).

4. The integrally formed inductor according to claim 3, characterized in that: The coil conductor (2) is sleeved on the outer surface of the first magnet (1).

5. The integrally formed inductor according to claim 1, wherein: The raw material of the first magnet (1) is soft magnetic powder.

6. The integrally formed inductor according to claim 4, characterized in that: The first magnet (1) is a cylindrical structure.

7. The integrally formed inductor according to claim 4, characterized in that: The first magnet (1) is a "T"-shaped structure.

8. The integrally formed inductor according to claim 4, characterized in that: The first magnet (1) is an I-shaped structure.

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