CN216412818U

CN216412818U - Sinking type inductance structure

Info

Publication number: CN216412818U
Application number: CN202122588102.8U
Authority: CN
Inventors: 叶灼; 黄超; 唐景新
Original assignee: Changzhou Chuanglian Power Supply Co ltd
Current assignee: Changzhou Chuanglian Power Supply Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-04-29
Anticipated expiration: 2031-10-26

Abstract

The utility model relates to the technical field of inductors, in particular to a sinking type inductor structure which comprises a plurality of inductors arranged on a PCB and a base, wherein a sinking groove capable of containing the inductors is formed in the base, a mounting hole capable of containing the base is formed in the PCB, the base comprises a mounting part and a sinking part, the mounting part is arranged above the PCB, the sinking part extends into the mounting hole, the sinking groove is formed in the sinking part, the mounting part is a mounting lug which is uniformly distributed on the upper edge of the sinking part in the circumferential direction, and a terminal for fixing is inserted in the mounting lug. This inductance structure is through being equipped with the base of sinking the groove, places the inductance in the sinking groove of base, assembles behind the PCB board, and the inductance part of actual PCB board top is far less than conventional inductance product to avoid highly transfiniting, establish the base cover in the mounting hole through the installation department that sets up above the PCB board, simplified mounting process.

Description

Sinking type inductance structure

Technical Field

The utility model relates to the technical field of inductors, in particular to a sinking type inductor structure.

Background

Inductance is a property of a closed loop and is a physical quantity. When current passes through the coil, magnetic field induction is formed in the coil, and the induced magnetic field can generate induction current to resist the current passing through the coil. It is a parameter of the circuit that describes the induced electromotive force effect induced in the present coil or in another coil due to the change in the coil current.

The common-mode inductor structure for the electromagnetic interference suppression of the switching power supply can be extended to a differential-mode inductor. In the field of switching power supplies, in order to suppress the EMI interference of the switching power supply so that the switching power supply meets the relevant national and regional standards, an EMI filter is generally required to be added at the input end of the switching power supply, and a common-mode inductor can be used for suppressing the common-mode interference noise in the switching power supply; the differential mode inductance can be used to suppress differential mode interference noise within the switching power supply.

At present, in the design of ultra-thin switch power supply, the height (or thickness) of the common mode inductor needs to be further reduced, including adopting the method of mounting technology sinking in the circuit board and the like, so that the height of the device does not exceed the limit value. At present conventional inductance class product is directly to place the coil on the base, and inductance overall height is coil height plus bottom plate height, when ultra-thin power application, the problem that highly surpassed the design demand often can appear.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that the total height of the existing inductor is easy to exceed the limit height, the utility model provides a sinking type inductor structure, which solves the problem through a base provided with a sinking groove.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a formula of sinking inductance structure, is including setting up a plurality of inductances on the PCB board, still includes the base, is equipped with the sink that can place the inductance on the base, and it has the mounting hole that can hold the base to open on the PCB board, and the bottom surface of base is less than the mounting hole.

According to this scheme, through the base that is equipped with the heavy groove of sinking, place the inductance in the heavy groove of base, assemble behind the PCB board, the inductance part of actual PCB board top is far less than conventional inductance product to avoid highly transfiniting.

Further, the base includes the installation department and sinks the portion, and the installation department setting is in PCB board top, and it is downthehole that the portion that sinks stretches into the mounting hole, sinks the groove setting and is sinking in the portion.

According to the scheme, the base is sleeved in the mounting hole through the mounting part arranged above the PCB, so that the mounting process is simplified.

Furthermore, the installation part is an installation lug which is uniformly distributed on the upper edge of the sinking part in the circumferential direction, a terminal is inserted on the installation lug, and the terminal is electrically connected with the inductor.

According to this scheme, the installation ear that the utilization was inserted and is equipped with the terminal fixes the base on the PCB board, and it is convenient to install.

Furthermore, the inductor comprises windings, a magnetic core and a partition board, the partition board divides an inner ring of the magnetic core into two parts with the same size, two groups of windings are wound on the magnetic core and are respectively arranged on two sides of the partition board, and terminals are connected with the wire ends of the windings.

According to the scheme, when the common-mode current flows through the winding, due to the isotropy of the common-mode current, the equidirectional magnetic field can be generated in the winding to increase the inductance of the winding, so that the winding presents high impedance, a strong damping effect is generated, the common-mode current is attenuated, and the purpose of filtering is achieved.

Furthermore, the mounting lug is provided with an insertion hole for inserting a terminal, and the terminal is inserted into the welding hole of the PCB through the insertion hole.

According to the scheme, the sinking operation is simplified, the automatic wave soldering is supported, and the manual welding is not needed.

Further, at least three mounting ears are provided.

According to this scheme, through the installation ear of circumference equipartition, guarantee pedestal mounting's stability.

The utility model has the advantages that the effective height above the whole PCB circuit board is reduced with the same inductance; the PCBA sinking operation is simplified, automatic wave soldering is supported, and manual soldering is not needed; the sinking size can be controlled, and the accuracy can reach within +/-0.2 mm.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of FIG. 1 with the PCB removed;

FIG. 3 is a side view of FIG. 1 with the PCB removed;

FIG. 4 is a schematic view of the base of the present invention;

FIG. 5 is a schematic diagram of a common mode inductor circuit;

in the figure, 1, a PCB board, 2, an inductor, 21, a winding, 22, a magnetic core, 23, a partition plate, 3, a base, 31, a mounting part, 311, a mounting lug, 32, a sunken part, 4, a sunken groove, 5, a mounting hole and 6, terminals are arranged.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

As shown in fig. 1-3, a formula of sinking inductance structure, including setting up a plurality of inductances 2 on PCB board 1, still include base 3, be equipped with on base 3 and place the sink 4 of inductance 2, it has the mounting hole 5 that can hold base 3 to open on the PCB board 1, and the bottom surface of base 3 is less than mounting hole 5.

When installing the use, at first in the mounting hole 5 on the PCB board 1 of 3 cover installations of base that will be equipped with terminal 6, through inserting terminal 6 in the welding hole, realize the fixed to base 3, then place inductance 2 in the sink 4 of base 3, at this moment, inductance 2 part of actual PCB board 1 top is far less than conventional inductance product, avoids appearing the problem that inductance total height surpasss the design demand, guarantees the application of ultra-thin power.

The base 3 comprises a mounting portion 31 and a sinking portion 32, the mounting portion 31 is arranged above the PCB board 1, the sinking portion 32 extends into the mounting hole 5, and the sinking groove 4 is arranged in the sinking portion 32. The mounting lug 311 is provided with an insertion hole for inserting the terminal 6, and the terminal 6 is inserted into the soldering hole of the PCB 1 through the insertion hole.

Through the cooperation of 3 suits of base and the 6 welded of terminal, simplify PCBA and sink the effect, support automatic wave-soldering, need not manual welding, connect reliable and stable.

The inductor 2 comprises a winding 21, a magnetic core 22 and a partition 23, the partition 23 divides an inner ring of the magnetic core 22 into two parts with the same size, two groups of windings 21 are wound on the magnetic core 22, the two groups of windings 21 are respectively arranged on two sides of the partition 23, and the terminal 6 is connected with the line end of the winding 21.

The circuit diagram of the common mode inductor is shown in fig. 5, and two groups of windings 21 in the inductor 2 are wound in opposite directions, and have the same number of turns and phase, and are used for filtering common mode electromagnetic interference signals. When normal current is introduced into the circuit, the current generates reverse magnetic fields in the windings 21 wound in the same phase to counteract each other; when the common mode current flows through the winding, because of the same phase of the common mode current, a magnetic field in the same direction is generated in the winding to increase the inductance of the winding, so that the winding presents high impedance and generates a strong damping effect to attenuate the common mode current and achieve the purpose of filtering.

As shown in fig. 4, the mounting portions 31 are mounting lugs 311 uniformly distributed on the upper edge of the sinking portion 32 in the circumferential direction, terminals 6 are inserted on the mounting lugs 311, the terminals 6 are electrically connected with the inductor 2, and at least three mounting lugs 311 are provided. The installation of the sinking portion 32 is realized by the installation lugs 311 which are uniformly distributed on the periphery of the sinking portion 32 in the circumferential direction, and the installation stability is good.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a formula of sinking inductance structure, is including setting up a plurality of inductance (2) on PCB board (1), its characterized in that still includes base (3), be equipped with on base (3) and place sink (4) of inductance (2), it has mounting hole (5) that can hold base (3) to open on PCB board (1), the bottom surface of base (3) is less than mounting hole (5).

2. A sinking inductor structure according to claim 1, wherein the base (3) comprises an installation part (31) and a sinking part (32), the installation part (31) is arranged above the PCB board (1), the sinking part (32) extends into the installation hole (5), and the sinking groove (4) is arranged in the sinking part (32).

3. A sinking inductor structure according to claim 2, wherein the mounting portions (31) are mounting lugs (311) circumferentially and uniformly distributed on the upper edge of the sinking portion (32), terminals (6) are inserted into the mounting lugs (311), and the terminals (6) are electrically connected with the inductor (2).

4. A sinking inductor structure according to claim 3, wherein the inductor (2) comprises a winding (21), a magnetic core (22) and a partition (23), the partition (23) divides the inner ring of the magnetic core (22) into two parts with the same size, two groups of windings (21) are wound on the magnetic core (22), the two groups of windings (21) are respectively arranged on two sides of the partition (23), and the terminal (6) is connected with the wire ends of the windings (21).

5. A sinking inductor structure according to claim 3, wherein the mounting lug (311) is provided with a jack for inserting the terminal (6), and the terminal (6) is inserted into the soldering hole of the PCB board (1) via the jack.

6. A sinking inductor structure according to claim 3, wherein at least three mounting lugs (311) are provided.