CN213752211U

CN213752211U - Anti-stress shell and annular inductor with same

Info

Publication number: CN213752211U
Application number: CN202023285078.2U
Authority: CN
Inventors: 吴靖中; 吴俊益
Original assignee: Zhuhai Gang Song Electronics Co ltd
Current assignee: Zhuhai Gang Song Electronics Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-07-20
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to the technical field of inductance, in particular to an anti-stress shell and an annular inductor with the same, which comprises an upper shell and a lower shell which are annular, wherein the upper shell and/or the lower shell extend to form an outer annular surface to form an annular hollow structure, and the diameter of the annular hollow structure is matched with the outer diameter of an annular magnetic core; the utility model discloses an anti stress shell adopts the annular hollow structure of epitheca, inferior valve and outer anchor ring formation to this annular hollow structure's diameter size and annular magnetic core's external diameter size phase-match, annular magnetic core holding is in annular hollow structure, avoids the coil direct winding on annular magnetic core and causes the problem that the magnetic permeability descends, and can lay wire the space big, is applicable to singly organize the annular inductance of magnetic circuit, has simple structure, and is with low costs, the advantage of adaptable high inductance volume.

Description

Anti-stress shell and annular inductor with same

Technical Field

The utility model relates to an inductance technical field especially relates to an anti stress shell and have this anti stress shell's annular inductance.

Background

The ferrite magnetic ring is usually applied to a filter, so that the use requirement of high inductance is frequently met, but the stress generated by directly placing a copper wire on a toroidal core often causes the problem of magnetic flux reduction of the core, and the toroidal core usually needs to be baked at 60 ℃ to 80 ℃ for about thirty minutes or left for a period of time to dissipate the stress, so that the toroidal core often uses a shell as protection and can reduce the stress problem caused by winding, while the shell on the market at present is mostly only used for a common mode coil, and a partition plate needs to be added to strengthen insulation, so that the wiring space is small.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiencies of the prior art, the utility model provides an anti stress shell and have this anti stress shell's annular inductance, it has simple structure, but the wiring space is big, the advantage of adaptable high inductance volume.

The utility model provides a technical scheme that its technical problem adopted does: the stress-resistant shell comprises an upper shell and a lower shell which are annular, wherein the outer annular surface of the upper shell and/or the outer annular surface of the lower shell extend to form an annular hollow structure, and the diameter size of the annular hollow structure is matched with the outer diameter size of an annular magnetic core.

Further, the height dimension of the outer annular surface is matched with the thickness dimension of the annular magnetic core.

Further, the upper shell and the lower shell are provided with outer ring surfaces, and the upper shell and the lower shell are symmetrically arranged.

Further, the size of the inner hole of the upper shell and/or the lower shell is smaller than or equal to the diameter of the inner ring of the annular magnetic core.

Further, the outer ring surface and the upper case or the lower case are integrally formed.

Further, the upper shell and/or the lower shell are made of PBT materials.

The utility model also provides an annular inductance, include as above the anti stress shell of embodiment, still include the holding and be in annular magnetic core in the anti stress shell with twine coil on the anti stress shell.

Further, the outer surface of the annular magnetic core is coated with an insulating varnish.

The beneficial effects of the utility model are that: the utility model discloses an anti stress shell adopts the annular hollow structure of epitheca, inferior valve and outer anchor ring formation to this annular hollow structure's diameter size and annular magnetic core's external diameter size phase-match, annular magnetic core holding is in annular hollow structure, avoids the coil direct winding on annular magnetic core and causes the problem that the magnetic permeability descends, and can lay wire the space big, is applicable to singly organize the annular inductance of magnetic circuit, has simple structure, and is with low costs, the advantage of adaptable high inductance volume.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of an assembly of a stress-resistant housing and an annular magnetic core according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a ring inductor according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1, a stress-resistant case includes an upper case 100 and a lower case 200, each of which is annular, and the upper case 100 and/or the lower case 200 is extended with an outer annular surface 300 to form an annular hollow structure, specifically, the upper case 100 and the lower case 200 are provided with the outer annular surface 300, that is, the upper case 100 and the lower case 200 are respectively formed with the outer annular surface 300 to have a cover shape having a through hole 400 at an end thereof, and an annular magnetic core 500 is received in the annular hollow structure formed between the upper case 100 and the lower case 200, and the diameter of the annular hollow structure is matched with the outer diameter of the annular magnetic core 500, and in some embodiments, the upper case 100 and the lower case 200 are respectively formed integrally with the outer annular surface 300, for the purpose of facilitating mold opening and reducing the production cost; when using, can put into epitheca 100 or inferior valve 200 earlier with annular magnetic core 500, the part that exposes on annular magnetic core 500 is established to inferior valve 200 or epitheca 100 corresponding ground lid again, and then can wrap up the upper and lower terminal surface and the outer ring surface of annular magnetic core 500, coil 600 twines again and realizes fixing on this anti stress shell, in this embodiment, the inner ring part fretwork of this anti stress shell, do not occupy the space of the inner circle part of annular magnetic core, the space that the increase can be wired, and the steam generator has a simple structure, the equipment is convenient, advantages with low costs, and effectively avoid coil 600 direct winding on annular magnetic core 500 and cause the problem that the magnetic permeability descends.

In some embodiments, the height dimension of the outer annular surface 300 is matched with the thickness dimension of the annular magnetic core 500, so that the upper case 100 and the lower case 200 can completely cover the annular magnetic core 500 through the outer annular surface 300.

In some embodiments, the upper case 100 and the lower case 200 each have an outer annular surface 300, and the upper case 100 and the lower case 200 are symmetrically disposed, that is, the upper case 100 and the lower case 200 have the same structure, which aims to reduce the mold opening and the production cost, in this embodiment, the height dimensions of the outer annular surfaces 300 of the upper case 100 and the lower case 200 are equal and the sum of the heights of the two outer annular surfaces 300 matches the outer diameter dimension of the annular magnetic core 500, and in use, the upper case 100 and the lower case 200 are relatively fixed by winding the coil 600.

In some embodiments, the inner hole size of the upper case 100 and the lower case 200, both of which are annular, is smaller than or equal to the inner diameter of the annular magnetic core 500, in order to ensure that the stress-resistant outer case can completely cover the upper and lower surfaces of the annular magnetic core 500 and the outer annular surface 300, while the inner annular surface of the annular magnetic core 500 is empty to enlarge the wiring space.

In some embodiments, the upper case 100 and/or the lower case 200 are made of PBT material, which is polybutylene terephthalate, which is polyester prepared by polycondensation of terephthalic acid and 1, 4-butanediol, which is opalescent translucent to opaque, semi-crystalline thermoplastic polyester, and has the characteristics of high heat resistance, long-term operation at 140 ℃, toughness, fatigue resistance, self-lubrication, low friction coefficient, no strong acid or alkali resistance, organic solvent resistance, flammability resistance, and decomposition at high temperature, and thus is quite suitable for application to a stress-resistant case of a toroidal inductor.

Referring to fig. 2, a toroidal inductor includes a toroidal core 500 accommodated in a stress-resistant case and a coil 600 wound on the stress-resistant case, and in particular, an outer surface of the toroidal core 500 is coated with an insulating varnish.

The utility model discloses an anti stress shell is suitable for singly organizing the annular inductance of magnetic circuit, simple structure, low in production cost, but the wiring space is big, can pack into the annular magnetic core 500 that has coated the insulated paint in annular hollow structure, and then the central part of this anti stress shell can be used for the wiring completely, is applicable to the filter inductance design of high inductance volume.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A stress-resistant housing is characterized by comprising an upper shell (100) and a lower shell (200) which are annular, wherein the upper shell (100) and/or the lower shell (200) extend/extends an outer annular surface (300) to form an annular hollow structure, and the diameter size of the annular hollow structure is matched with the outer diameter size of an annular magnetic core (500).

2. A stress-resistant casing according to claim 1, wherein the height dimension of the outer annular surface (300) is matched to the thickness dimension of the toroidal core (500).

3. A stress-resistant casing according to claim 1 or 2, wherein the upper casing (100) and the lower casing (200) each have an outer annular surface (300), and the upper casing (100) and the lower casing (200) are arranged symmetrically.

4. A stress-resistant casing according to claim 1, wherein the dimensions of the inner bore of the upper shell (100) and/or the lower shell (200) are smaller than or equal to the diameter of the inner ring of the annular magnetic core (500).

5. A stress-resistant casing according to claim 1, wherein the outer annular surface (300) is provided integrally with the upper shell (100) or the lower shell (200).

6. A stress-resistant housing according to claim 1 or 5, characterized in that the upper shell (100) and/or the lower shell (200) are made of PBT material.

7. A toroidal inductor comprising a stress-resistant casing according to any of claims 1 to 6, further comprising a toroidal magnetic core (500) housed within the stress-resistant casing and a coil (600) wound around the stress-resistant casing.

8. A toroidal inductor according to claim 7, wherein the outer surface of said toroidal core (500) is coated with an insulating varnish.