Inductor structure and switching power supply

Abstract

The utility model discloses an inductor structure, a switching power supply and a base, the base comprises a mounting part and a limiting part arranged on one side of the mounting part, the limiting part and the mounting part form a mounting groove, and the mounting part is provided with a first mounting part and a second mounting part; the first PIN needle is embedded in the first mounting part, the first PIN needle is provided with a first wire slot, and the first wire slot is vertically or horizontally arranged; the second PIN needle is embedded in the second mounting part, the second PIN needle is provided with a second wire slot, and the second wire slot is vertically or horizontally arranged; the inductor is mounted in the mounting groove, and the inductor is fixed with the mounting part and the limiting part. According to the utility model, the problems of coil turn-to-turn short circuit caused by damage of a paint film due to bending during wire outgoing of the flat wire coil and increase of coil height occupation due to bending are effectively solved, and the risk of damage caused by mechanical stress is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electronic design, in particular to an inductor structure. Background Art

[0002] With the development of switching power supply technology, the power density of switching power supplies is getting higher and higher, and the components used in switching power supplies are gradually tending to be miniaturized, SMD, flattened and automated. However, the volume of inductive devices still accounts for a large proportion of the volume of switching power supplies, and with the increasing power density of switching power supplies, their volume share is also increasing. With the trend of flattening and small size, medium and high power inductors often use flat wires as the material of the inductor coil, but as the power increases, the thicker the flat coil, the more difficult it becomes to install. The traditional installation method may lead to disadvantages such as low space utilization and damage to the coil. Therefore, there is an urgent need for a new inductor structure design to solve the problems of difficult installation, low space utilization, and difficulty in SMD and flattening of flat coils of medium and high power inductors in switching power supply design. Utility Model Content

[0003] The purpose of the utility model is to provide an inductor structure, aiming to overcome the difficulties in the above-mentioned prior art such as the difficulty in installing the flat coil outlet of the inductor, the low space utilization rate of the coil in the magnetic core, the large volume of the inductor, and the difficulty in flattening the installation.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In a first aspect, the utility model provides an inductor structure, which comprises:

[0006] A base, the base comprising a mounting portion and a limiting portion arranged on one side of the mounting portion, the limiting portion and the mounting portion forming a mounting groove, the mounting portion having a first mounting portion and a second mounting portion;

[0007] A first PIN needle, embedded in the first mounting portion, the first PIN needle is provided with a first wire groove, and the first wire groove is arranged vertically or horizontally;

[0008] A second PIN needle, embedded in the second mounting portion, the second PIN needle is provided with a second wire groove, and the second wire groove is arranged vertically or horizontally;

[0009] An inductor is installed in the installation slot, and the inductor is fixed to the installation portion and the limiting portion.

[0010] Optionally, the limiting portion includes a limiting plate and a reinforcing block, the limiting plate is perpendicular to the first mounting portion, and the reinforcing block protrudes from an upper surface of the first mounting portion.

[0011] Optionally, a space avoiding portion is provided at the bottom of the limiting portion.

[0012] Optionally, the reinforcement block is provided with a groove, and the first PIN needle and the second PIN needle are at least partially arranged in the groove.

[0013] Optionally, the first PIN needle includes a first welding portion and a second welding portion, wherein the first welding portion is exposed at the bottom of the mounting portion, the second welding portion is exposed at the top of the mounting portion, and the second welding portion is connected to the coil of the inductor; the second PIN needle includes a third welding portion and a fourth welding portion, wherein the third welding portion is exposed at the bottom of the mounting portion, the fourth welding portion is exposed at the top of the mounting portion, and the fourth welding portion is connected to the coil of the inductor.

[0014] Optionally, the first welding portion and the third welding portion are both chip pads.

[0015] Optionally, the bottom of the mounting portion is flush with the bottom of the inductor.

[0016] In a second aspect, the utility model further provides an inductor structure, which includes:

[0017] A base, the base comprising a mounting portion and a limiting portion arranged on one side of the mounting portion, the limiting portion and the mounting portion forming a mounting groove, the mounting portion having a first mounting portion and a second mounting portion;

[0018] A first PIN needle, embedded in the first mounting portion, the first PIN needle is provided with a first wire groove, and the first wire groove is arranged along the wire outlet direction;

[0019] A second PIN needle is embedded in the second mounting portion, the second PIN needle is provided with a second wire groove, and the second wire groove is arranged along the wire outlet direction;

[0020] An inductor is installed in the installation slot, and the inductor is fixed to the installation portion and the limiting portion, wherein the outgoing line direction is the outgoing line direction of the coil of the inductor.

[0021] In a third aspect, the utility model further provides a switching power supply, which includes the inductor structure as described in the first aspect or the second aspect.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides the first wire groove and the second wire groove on the first PIN needle and the second PIN needle, so that the coil of the inductor can be naturally inserted into the first wire groove and the second wire groove for welding and installation, effectively solving the problem that the paint film of the flat wire coil may be damaged due to bending when the wire is output, causing a short circuit between the coil turns, and the problem that the height of the coil is increased due to bending, thereby reducing the risk of damage due to mechanical stress.

[0024] The utility model realizes the flattening and patch installation of high-power inductors by welding and fixing the inductors to the patch base, which is conducive to automated production. The utility model can minimize the space occupation and make full use of the special structural design to reduce the impact of installation on the space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of an inductor structure of the utility model;

[0026] Figure 2 It is a top view of an inductor structure of the utility model;

[0027] Figure 3 This is a front view of an inductor structure of the utility model;

[0028] Figure 4 This is a front view of the skeleton of an inductor structure of the utility model;

[0029] Figure 5 It is a three-dimensional schematic diagram of another embodiment of an inductor structure of the utility model.

[0030] The specific reference numerals are as follows:

[0031] Base 1, first PIN needle 2, second PIN needle 3, inductor 4, mounting portion 11, limiting portion 12, mounting groove 13, first mounting portion 111, second mounting portion 112, first wire groove 21, second wire groove 31, limiting plate 121, reinforcing block 122, air avoidance portion 123, groove 124, first welding portion 22, second welding portion 23, third welding portion 32, fourth welding portion 33. DETAILED DESCRIPTION

[0032] The present invention and its beneficial effects will be further described in detail below in conjunction with specific implementation methods and drawings of the specification; however, the specific implementation methods of the present invention are not limited thereto.

[0033] refer to Figure 1 to Figure 5 The utility model provides an inductor structure, which includes a base 1, a first PIN needle 2, a second PIN needle 3 and an inductor 4.

[0034] The base 1 includes a mounting portion 11 and a limiting portion 12 disposed on one side of the mounting portion 11. The limiting portion 12 and the mounting portion 11 form a mounting groove 13. The mounting portion 11 has a first mounting portion 111 and a second mounting portion 112.

[0035] The first PIN needle 2 is embedded in the first mounting portion 111 , and the first PIN needle 2 is provided with a first wire groove 21 , and the first wire groove 21 is arranged vertically or horizontally;

[0036] The second PIN needle 3 is embedded in the second mounting portion 112 , and the second PIN needle 3 is provided with a second wire groove 31 , and the second wire groove 31 is arranged vertically or horizontally;

[0037] The inductor 4 is installed in the installation slot 13 , and the inductor 4 is fixed to the installation portion 11 and the limiting portion 12 .

[0038] In this embodiment, the first PIN needle 2 and the second PIN needle 3 are located on the same straight line, and the coil of the inductor 4 is a flat coil. When the flat coil is connected, the wire at one end is connected vertically, and the wire at the other end is usually connected horizontally. If the wire slots are designed to be vertical, the wire slots for horizontal connection must be bent 90°, which will generate mechanical stress to cause the wire package to rub against the magnetic core, and there may be a risk of paint film damage. On the other hand, the force generated after the wire package is bent will make it impossible for the wire package to be laid flat in the magnetic core, which will have an adverse effect on the height space utilization of the magnetic core. The first wire slot 21 and the second wire slot 31 in this embodiment are designed according to the direction in which the flat coil naturally appears. The first wire slot 21 and the second wire slot 31 are designed in two directions, horizontal and vertical, corresponding to the two ends of the flat coil, respectively, to adapt to the connection direction of the flat coil.

[0039] In this embodiment, the inductor 4 is installed in the installation groove 13. The inductor 4 includes a magnetic core and a coil wound around the outer periphery of the magnetic core. The outer surface of the magnetic core of the inductor 4 is fixed to the installation part 11 and the limiting part 12 respectively through a colloid. The installation part 11 and the limiting part 12 form an L-shaped structure, which plays a limiting role on the inductor 4.

[0040] In one embodiment, the limiting portion 12 includes a limiting plate 121 and a reinforcing block 122, wherein the limiting plate 121 is perpendicular to the first mounting portion 111 and the reinforcing block 122 protrudes from the upper surface of the first mounting portion 111. The mounting portion 11 can better limit the inductor 4 through the limiting plate 121 and the reinforcing block 122.

[0041] In one embodiment, a clearance portion 123 is provided at the bottom of the position limiting portion 12. For structural strength, the position limiting portion 12 is usually thicker, resulting in a large size of the finished inductor 4. In this embodiment, the position limiting portion 12 is hollowed out below to form a clearance portion 123. In this way, not only the thickness below the position limiting portion 12 is greatly reduced, but also the thickness above can be maintained to ensure structural strength. The space saved by the clearance portion can be utilized.

[0042] In one embodiment, the reinforcing block 122 is provided with a groove 124 , and the first PIN needle 2 and the second PIN needle 3 are at least partially disposed in the groove 124 .

[0043] In one embodiment, the first PIN needle 2 includes a first welding portion 22 and a second welding portion 23, wherein the first welding portion 22 is exposed at the bottom of the mounting portion 11, the second welding portion 23 is exposed at the top of the mounting portion 11, and the second welding portion 23 is connected to the coil of the inductor 4; the second PIN needle 3 includes a third welding portion 32 and a fourth welding portion 33, wherein the third welding portion 32 is exposed at the bottom of the mounting portion 11, the fourth welding portion 33 is exposed at the top of the mounting portion 11, and the fourth welding portion 33 is connected to the coil of the inductor 4.

[0044] In one embodiment, the first soldering portion 22 and the third soldering portion 32 are both SMD pads.

[0045] In one embodiment, the bottom of the mounting portion 11 is flush with the bottom of the inductor 4. In this embodiment, the first soldering portion 22 and the third soldering portion 32 have a hollow design, thereby ensuring that the first PIN needle 2 and the second PIN needle 3 are in the same plane as the inductor 4 as a whole. Secondly, the hollow design can prevent the solder from lifting the inductor 4 during soldering, thereby ensuring the flushness of the bottom.

[0046] In one embodiment, the utility model embodiment further provides an inductor structure, which includes a base 1 , a first PIN needle 2 , a second PIN needle 3 and an inductor 4 .

[0047] The base 1 includes a mounting portion 11 and a limiting portion 12 disposed on one side of the mounting portion 11. The limiting portion 12 and the mounting portion 11 form a mounting groove 13. The mounting portion 11 has a first mounting portion 111 and a second mounting portion 112.

[0048] The first PIN needle 2 is embedded in the first mounting portion 111, and the first PIN needle 2 is provided with a first wire groove 21, and the first wire groove 21 is arranged along the wire outlet direction;

[0049] The second PIN needle 3 is embedded in the second mounting portion 112, and the second PIN needle 3 is provided with a second wire groove 31, and the second wire groove 31 is arranged along the wire outlet direction;

[0050] The inductor 4 is installed in the installation groove 13 , and the inductor 4 is fixed to the installation portion 11 and the limiting portion 12 , wherein the outgoing line direction is the outgoing line direction of the coil of the inductor 4 .

[0051] The remaining specific structures of this embodiment are consistent with the above embodiment and will not be described in detail here.

[0052] The description of the above embodiments is only used to help understand the utility model concept of the present application, and is not intended to limit the present utility model. For ordinary technicians in this technical field, any modifications, equivalent substitutions, improvements, etc. made without departing from the principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An inductor structure, characterized in that: The inductor structure comprises: A base, the base comprising a mounting portion and a limiting portion arranged on one side of the mounting portion, the limiting portion and the mounting portion forming a mounting groove, the mounting portion having a first mounting portion and a second mounting portion; A first PIN needle, embedded in the first mounting portion, the first PIN needle is provided with a first wire groove, and the first wire groove is arranged vertically or horizontally; A second PIN needle, embedded in the second mounting portion, the second PIN needle is provided with a second wire groove, and the second wire groove is arranged vertically or horizontally; An inductor is installed in the installation slot, and the inductor is fixed to the installation portion and the limiting portion.

2. The inductor structure according to claim 1, characterized in that: The limiting portion includes a limiting plate and a reinforcing block, the limiting plate is perpendicular to the first mounting portion, and the reinforcing block protrudes from an upper surface of the first mounting portion.

3. The inductor structure according to claim 2, characterized in that: A space-avoiding portion is provided at the bottom of the limiting portion.

4. The inductor structure according to claim 2, characterized in that: The reinforcing block is provided with a groove, and the first PIN needle and the second PIN needle are at least partially arranged in the groove.

5. The inductor structure according to claim 1, characterized in that: The first PIN needle includes a first welding portion and a second welding portion, wherein the first welding portion is exposed at the bottom of the mounting portion, the second welding portion is exposed at the top of the mounting portion, and the second welding portion is connected to the coil of the inductor; the second PIN needle includes a third welding portion and a fourth welding portion, wherein the third welding portion is exposed at the bottom of the mounting portion, the fourth welding portion is exposed at the top of the mounting portion, and the fourth welding portion is connected to the coil of the inductor.

6. The inductor structure according to claim 5, characterized in that: The first welding portion and the third welding portion are both chip pads.

7. The inductor structure according to claim 1, characterized in that: The bottom of the mounting portion is flush with the bottom of the inductor.

8. An inductor structure, characterized in that: The inductor structure comprises: A base, the base comprising a mounting portion and a limiting portion arranged on one side of the mounting portion, the limiting portion and the mounting portion forming a mounting groove, the mounting portion having a first mounting portion and a second mounting portion; A first PIN needle, embedded in the first mounting portion, the first PIN needle is provided with a first wire groove, and the first wire groove is arranged along the wire outlet direction; A second PIN needle is embedded in the second mounting portion, the second PIN needle is provided with a second wire groove, and the second wire groove is arranged along the wire outlet direction; An inductor is installed in the installation slot, and the inductor is fixed to the installation portion and the limiting portion, wherein the outgoing line direction is the outgoing line direction of the coil of the inductor.

9. A switching power supply, characterized in that: The switching power supply comprises the inductor structure according to any one of claims 1 to 8.

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