CN209804419U

CN209804419U - I-shaped inductor for preventing package layer from cracking

Info

Publication number: CN209804419U
Application number: CN201921129054.2U
Authority: CN
Inventors: 刘燕军; 周锦章
Original assignee: Shenzhen Century Stable Electronic Co Ltd
Current assignee: Shenzhen Century Stable Electronic Co Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2019-12-17
Anticipated expiration: 2029-07-17

Abstract

The utility model belongs to the technical field of the technique of inductance and specifically relates to a prevent I shape inductor of encapsulation layer fracture. The coil packaging structure comprises a hollow I-shaped framework and a magnetic core arranged in the framework, wherein a coil is wound on the framework in the circumferential direction, the framework and the coil are packaged through a packaging layer, the framework comprises a central pipe and end pipes arranged at two ends of the central pipe, and a connecting part between adjacent surfaces of the end pipes is provided with a fillet; and the rounded corners are coated with elastic rings. The connecting part between the adjacent surfaces of the end pipes is provided with a fillet, so that stress concentration can be reduced very well, and cracking of the packaging layer in a high-temperature or low-temperature environment is prevented; the elastic ring has good elastic effect, and can further relieve the cracking phenomenon caused by overlarge local stress of the packaging layer.

Description

I-shaped inductor for preventing package layer from cracking

Technical Field

The utility model belongs to the technical field of the technique of inductance and specifically relates to a prevent I shape inductor of encapsulation layer fracture.

Background

An inductor is an element capable of converting electric energy into magnetic energy and storing the magnetic energy, and generally comprises a framework, a winding, a shielding case, a packaging material, a magnetic core or an iron core and the like. Inductors are also a relatively common type of electronic component in electrical circuits.

the inductor can be divided into a winding type inductor and a laminated type inductor according to a manufacturing method, the winding type inductor of the winding type inductor is formed by winding a copper wire into a spiral shape on a ferrite magnetic core, the size of the winding type inductor is rich and colorful, the high inductance value of mH level can be achieved, the winding type inductor is suitable for the large current field and the high inductance value field, and the winding type inductor is widely applied to the fields of mobile phones, televisions, hard disk drivers, digital cameras and the like.

For convenience of winding, an i-shaped inductor is often used in a circuit, but with the development and progress of science and technology, the requirement on the inductor is higher and higher, and particularly for some high-temperature and low-temperature environments, the quality of the inductor directly influences the normal operation of an electric appliance.

Chinese utility model patent CN202601390U discloses a high temperature resistance inductor, including skeleton, coil and pin, the coil is around on the skeleton, the pin sets up in the skeleton bottom, the skeleton is the bakelite skeleton, and above-mentioned scheme adopts the bakelite skeleton, and the chemical name of bakelite is phenolics, and temperature resistance is better, non-deformable, and the low price, but phenolics is a hard and fragile thermosetting material, and toughness is good inadequately, when doing temperature shock test, the encapsulation of inductor is serious fracture, and the skeleton is also broken easily or is burst apart, is not conform to special environment's such as military project requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a prevent I shape inductor of encapsulated layer fracture is with the adjacent face of skeleton end pipe to be fillet processing, and packaging material can not local stress too concentrate, is difficult to the fracture.

The utility model discloses an aim at can realize through following technical scheme: the I-shaped inductor comprises a hollow I-shaped framework and a magnetic core arranged in the framework, wherein a coil is wound on the framework in the circumferential direction, the framework and the coil are packaged through a packaging layer, the framework comprises a central pipe and end pipes arranged at two ends of the central pipe, and a connecting part between adjacent surfaces of the end pipes is provided with a fillet; and the rounded corners are coated with elastic rings.

Analysis shows that the adjacent surfaces of the bakelite framework end pipes in the utility model with the publication number of CN202601390U are right-angled, the acting force on the packaging material at the right-angled position is very concentrated, which also leads to easy cracking of the packaging material, the connecting part between the adjacent surfaces of the end pipes is arranged to be a fillet, which can reduce stress concentration very well and prevent cracking of the packaging layer under high-temperature or low-temperature environment; the elastic ring has good elastic effect, and can further relieve the cracking phenomenon caused by overlarge local stress of the packaging layer.

The utility model discloses further set up to: the elastic ring is made of organic silica gel.

By adopting the technical scheme, the organic silicon adhesive layer has higher thermal stability and good heat insulation, is not easy to be influenced by the external environment and obviously changes, has smaller influence on the packaging layer, has good anti-seismic performance, and can well protect the framework and the packaging layer.

The utility model discloses further set up to: the elastic ring is uniformly provided with reserved grooves in the circumferential direction around the central axis.

Through adopting above-mentioned technical scheme, under the high temperature environment, the elastic ring has certain inflation, and the expansion of offering for the elastic ring of reservation groove leaves the surplus, and is littleer to the influence of encapsulation layer.

The utility model discloses further set up to: an elastic layer is arranged between the coil and the packaging layer; the packaging layer is made of epoxy resin.

By adopting the technical scheme, the elastic layer can play a good buffering role, the coil cannot be directly contacted with the packaging layer, and the packaging layer is not easy to crack; epoxy has good physical and mechanical and electrical insulation performance, and the chemical resistance is good, and the heat resistance is also fine, is applied to the utility model discloses, can promote the comprehensive properties of inductor greatly.

The utility model discloses further set up to: a heat-conducting silica gel layer is arranged between the elastic layer and the coil, a cavity is formed between the heat-conducting silica gel layer and the elastic layer, and cooling liquid is filled in the cavity; the elastic layer, the cooling liquid and the heat-conducting silica gel layer form a heat-insulating layer.

Through adopting above-mentioned technical scheme, the coolant liquid specific heat capacity is bigger, is difficult to intensification and cooling, and then the operating temperature that keeps the inductance that can be better has excellent high temperature resistant and low temperature resistant performance, and the coolant liquid is liquid in addition, plays fine cushioning effect in inductor transportation and use, obtains obviously alleviating the impact force of each part of inductance, and the skeleton of inductor is also difficult to the breakage.

the utility model discloses further set up to: an elastic metal strip is arranged on one surface of the heat insulation layer away from the coil, and two ends of the elastic metal strip are movably connected; the heat insulation layer is disconnected and partially overlapped at the positions close to the two ends of the elastic metal strip.

By adopting the technical scheme, the thermal insulation layer is disconnected, the manufacturing process is simple and convenient, the elastic metal strip has a good limiting effect, the shape of the thermal insulation layer cannot be excessively limited, the elasticity of the thermal insulation layer is good, and the thermal insulation layer is better attached to the packaging material and the coil.

The utility model discloses further set up to: the one end extension that the elastic layer is close to the elastic metal strip forms extension portion, and extension portion overlaps with the elastic layer other end, is equipped with the bump on extension portion and the surface of the laminating of the elastic layer other end, is equipped with on the elastic layer and supplies bump male recess.

By adopting the technical scheme, the heat insulation layer is better attached to the coil, the mounting structure is simple, the operation is simple and convenient, and the production process is simple.

The utility model discloses further set up to: one end of the elastic metal strip is provided with a T-shaped groove, and the other end of the elastic metal strip is provided with a T-shaped piece inserted into the T-shaped groove.

Through adopting above-mentioned technical scheme, through the cooperation of T type groove and T type piece, fixed elastic metal strip that just can be fine, easy operation, production technology is also simple.

The utility model discloses further set up to: the positioning groove is formed in one surface, attached to the thermal insulation layer, of the T-shaped sheet, and the positioning piece capable of being inserted into the positioning groove is arranged on the thermal insulation layer.

By adopting the technical scheme, the thermal insulation layer is more convenient and quicker to install and is not easy to misplace through the matching of the positioning piece and the positioning groove; the heat insulation and cold insulation effects are better.

The utility model discloses further set up to: more than two elastic metal strips are uniformly arranged, and the connecting line of the end faces of the elastic metal strips and the axis of the coil form an acute angle.

By adopting the technical scheme, the fixing effect of the plurality of metal strips is better, and the stress of the heat insulation layer is more uniform; the connecting line of the end face of the elastic metal strip and the axis of the coil form an acute angle, so that the joint of the metal strip is staggered, and the fixing effect is better.

To sum up, the utility model discloses a beneficial technological effect does:

1. the connecting part between the adjacent surfaces of the end pipes is provided with a fillet, so that stress concentration can be reduced very well, and cracking of the packaging layer in a high-temperature or low-temperature environment is prevented; the elastic ring has good elastic effect, and can further relieve the cracking phenomenon caused by overlarge local stress of the packaging layer.

2. The elastic ring is made of organic silica gel, the organic silica gel layer has high thermal stability and good heat insulation, is not easy to be influenced by the external environment and obviously changes, the influence on the packaging layer is smaller, the anti-seismic performance of the organic silica gel layer is also good, and the framework and the packaging layer can be well protected.

3. Under the high temperature environment, the elastic ring has certain inflation, and the offering of reserve tank leaves the surplus for the inflation of elastic ring, and is littleer to the influence of encapsulation layer.

4. The cooling liquid specific heat capacity is bigger, is difficult to heat up and cool down, and then the operating temperature that keeps the inductance that can be better has excellent high temperature resistant and low temperature resistance, and the cooling liquid is liquid in addition, plays fine cushioning effect in inductor transportation and use, obtains obviously alleviating the impact force of each part of inductance, and the skeleton of inductor just is difficult to the breakage yet.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the thermal insulation layer and the elastic sleeve in the embodiment of the present invention;

FIG. 3 is a schematic diagram of a detailed structure of an overlapped portion of an organic silicone adhesive layer in an embodiment of the present invention;

Fig. 4 is a schematic view of a fixing structure of the elastic metal strip in the embodiment of the present invention.

In the figure, 1, a skeleton; 11. a central tube; 12. an end tube; 2. a magnetic core; 3. a coil; 4. a packaging layer; 5. a thermal insulation layer; 51. an elastic layer; 511. a positioning member; 512. a lengthening part; 5121. salient points; 52. cooling liquid; 53. a heat conductive silica gel layer; 6. an elastic metal strip; 61. a T-shaped groove; 62. a T-shaped sheet; 621. positioning a groove; 7. a pin; 8. an elastic ring; 81. and (5) reserving a groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1-4.

An i-shaped inductor for preventing a packaging layer 4 from cracking, as shown in fig. 1 and 2, comprises a hollow i-shaped framework 1 and a magnetic core 2 arranged in the framework 1, wherein a coil 3 is wound on the framework 1 in the circumferential direction, the framework 1 and the coil 3 are packaged by the packaging layer 4, and the packaging layer 4 is a packaging layer 4 made of epoxy resin; epoxy has good physical and mechanical and electrical insulation performance, and the chemical resistance is good, and the heat resistance is also fine, is applied to the utility model discloses, can promote the comprehensive properties of inductor greatly. The coil 3 is led out from the framework 1 and connected with pins 7, the two pins 7 are respectively connected with two ends of the coil 3, and the two pins 7 are respectively connected with a positive electrode and a negative electrode when in use.

as shown in fig. 2, the framework 1 comprises a central pipe 11 and end pipes 12 arranged at two ends of the central pipe 11, wherein the joints between the adjacent surfaces of the end pipes 12 are rounded; and the rounded corners are coated with elastic rings 8. The connecting part between the adjacent surfaces of the end pipe 12 is provided with a fillet, so that stress concentration can be reduced well, and the cracking of the packaging layer 4 under a high-temperature or low-temperature environment can be prevented; the elastic ring 8 has good elastic effect, and can further relieve the cracking phenomenon caused by overlarge local stress of the packaging layer 4.

In this embodiment, the elastic ring 8 is preferably an elastic ring 8 made of silicone rubber, the silicone rubber layer has high thermal stability and good thermal insulation, and is not easily affected by the external environment to cause obvious changes, so that the influence on the encapsulation layer 4 is smaller, the silicone rubber layer has good anti-seismic performance, and the framework 1 and the encapsulation layer 4 can be well protected.

The elastic ring 8 is evenly provided with U-shaped preformed grooves 81 around the circumference of the central axis. Under the high temperature environment, elastic ring 8 has certain inflation, and the offering of reservation groove 81 leaves the surplus for elastic ring 8's inflation, and is littleer to the influence of encapsulation layer 4.

As shown in fig. 2, an elastic layer 51 is arranged between the coil 3 and the encapsulation layer 4 (see fig. 1), the elastic layer 51 can play a good role in buffering, and the coil 3 can not be directly contacted with the encapsulation layer 4, so that the encapsulation layer 4 is less prone to cracking; the elastic layer 51 in this embodiment is preferably an organic silica gel layer. The organic silica gel layer has high thermal stability and good heat insulation, and the working temperature in the inductor is not easy to change; the organic silica gel layer also has good moisture resistance and shock resistance, and particularly has good shock resistance at high frequency.

A heat-conducting silica gel layer 53 is also arranged between the elastic layer 51 and the coil 3, a cavity is formed between the heat-conducting silica gel layer 53 and the elastic layer 51, and cooling liquid 52 is filled in the cavity; the elastic layer 51, the coolant 52 and the thermally conductive silicone layer 53 form a thermally insulating layer 5. The heat-conducting silica gel layer 53 has good heat-conducting property, and heat generated by the coil 3 in the working process is easily conducted to the cooling liquid 52 through the heat-conducting silica gel layer 53, so that the cooling effect is good. Heat conduction silica gel layer 53 has excellent cold and hot alternation resistance, ageing resistance and electrical insulation performance, still has excellent dampproofing, antidetonation, corona resistance, anti electric leakage performance and chemical resistance medium performance, is applied to the utility model discloses, the comprehensive properties of promotion inductor that can be better. In the embodiment, the cooling liquid 52 is preferably engine cooling liquid 52 sold by Shenzhen classical beautifying technology and technology development Limited, the model is DM-4003, the boiling point is as high as 130 ℃, the freezing point is-50 ℃, and the cooling liquid has excellent anti-boiling and anti-freezing effects. The coolant liquid 52 specific heat capacity is bigger, is difficult to heat up and cool down, and then the operating temperature that keeps the inductance that can be better, has excellent high temperature resistant and low temperature resistance, and coolant liquid 52 is liquid in addition, plays fine cushioning effect in inductor transportation and use, obtains obviously alleviating to the impact force of each part of inductance, and the skeleton 1 of inductor just also is difficult to the breakage, the normal use of assurance inductor that can be better.

As shown in fig. 2 and 3, an elastic metal strip 6 is bonded to one surface of the heat insulation layer 5 away from the coil 3, namely the organic silica gel layer, and two ends of the elastic metal strip 6 are movably connected; the thermal insulation layer 5 is broken and partially overlapped near both ends of the elastic metal strip 6. One end of the elastic layer 51 close to the elastic metal strip 6 is lengthened to form an elongated portion 512, and the elongated portion 512 overlaps with the other end of the organic silicon glue layer. The thermal-protective coating 5 breaks off, and the preparation technology is simple and convenient, and elastic metal strip 6 both had played fine limiting displacement, can not too inject the shape of thermal-protective coating 5 again, and thermal-protective coating 5 elasticity is good, and thermal-protective coating 5 is all better with the laminating of packaging material and coil 3.

The surface of the extended portion 512, which is attached to the other end of the elastic layer 51, is provided with a protrusion 5121, and the other end of the elastic layer 51 is provided with a groove (not shown) into which the protrusion 5121 is inserted. The heat insulation layer 5 is better attached to the coil 3, relative sliding is not easy to occur, the structure is simple, the operation is simple, and the production process is simple.

As shown in fig. 4, one end of the elastic metal strip 6 is provided with a T-shaped groove 61, and the other end is provided with a T-shaped piece 62 for inserting into the T-shaped groove 61. The T-shaped sheet 62 is provided with a positioning groove 621 on one side attached to the heat insulation layer 5, and the heat insulation layer 5 is provided with a positioning piece 511 capable of being inserted into the positioning groove 621. Through the matching of the positioning piece 511 and the positioning groove 621, the heat insulation layer 5 is more convenient and quicker to install and is not easy to be misplaced; the heat insulation and cold insulation effects are better.

The positioning element 511 is disposed in a frustum shape, the positioning slot 621 is also disposed in a frustum shape, and the positioning element 511 and the positioning slot 621 are in interference fit. The positioning member 511 can be inserted into the positioning slot 621 faster and more accurately, and is not easy to slide out of the positioning slot 621, so that the installation is simple and effective.

The elastic metal strips 6 are uniformly arranged more than two, three are arranged in the embodiment, and other embodiments can flexibly change according to the width of the metal strips and the height of the coil 3, so that better fixation is realized, and the stress of the heat insulation layer 5 is more uniform. The connecting line of the end face of the elastic metal strip 6 and the axis of the coil 3 form an acute angle, so that the joint of the metal strips is staggered, and the fixing effect is better.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The packaging layer cracking prevention I-shaped inductor comprises a hollow I-shaped framework (1) and a magnetic core (2) arranged in the framework (1), wherein coils (3) are wound on the framework (1) in the circumferential direction, the framework (1) and the coils (3) are packaged through a packaging layer (4), the framework (1) comprises a central tube (11) and end tubes (12) arranged at two ends of the central tube (11), and the packaging layer cracking prevention I-shaped inductor is characterized in that the joints between the adjacent surfaces of the end tubes (12) are set to be fillets; and the rounded corners are coated with elastic rings (8).

2. The i-shaped inductor for preventing the package layer from cracking as claimed in claim 1, wherein the elastic ring (8) is an elastic ring (8) made of silicone rubber.

3. The I-shaped inductor for preventing the package layer from cracking as claimed in claim 2, wherein the elastic ring (8) is provided with preformed grooves (81) uniformly in the circumferential direction around the central axis.

4. The i-shaped inductor for preventing the package layer from cracking as claimed in claim 1, wherein an elastic layer (51) is arranged between the coil (3) and the package layer (4); the packaging layer (4) is made of epoxy resin (4).

5. The I-shaped inductor for preventing the packaging layer from cracking as claimed in claim 4, wherein a heat-conducting silica gel layer (53) is further arranged between the elastic layer (51) and the coil (3), a cavity is formed between the heat-conducting silica gel layer (53) and the elastic layer (51), and cooling liquid (52) is filled in the cavity; the elastic layer (51), the cooling liquid (52) and the heat-conducting silica gel layer (53) form a heat-insulating layer (5).

6. The I-shaped inductor for preventing the packaging layer from cracking as claimed in claim 5, wherein an elastic metal strip (6) is arranged on one surface of the heat-insulating layer (5) far away from the coil (3), and two ends of the elastic metal strip (6) are movably connected; the heat insulation layer (5) is disconnected and partially overlapped at the positions close to the two ends of the elastic metal strip (6).

7. The package layer cracking prevention I-shaped inductor according to claim 6, wherein one end of the elastic layer (51) close to the elastic metal strip (6) is lengthened to form a lengthened portion (512), the lengthened portion (512) is overlapped with the other end of the elastic layer (51), a bump (5121) is arranged on the surface of the lengthened portion (512) attached to the other end of the elastic layer (51), and a groove for inserting the bump (5121) is arranged on the elastic layer (51).

8. The I-shaped inductor for preventing the package layer from cracking as claimed in claim 6, wherein the elastic metal strip (6) is provided with a T-shaped groove (61) at one end and a T-shaped piece (62) inserted into the T-shaped groove (61) at the other end.

9. The I-shaped inductor for preventing the package layer from cracking as claimed in claim 8, wherein a positioning groove (621) is formed on one surface of the T-shaped sheet (62) attached to the heat insulation layer (5), and a positioning element (511) capable of being inserted into the positioning groove (621) is arranged on the heat insulation layer (5).

10. The I-shaped inductor for preventing the package layer from cracking as claimed in claim 6, wherein the number of the elastic metal strips (6) is more than two, and a connecting line of the end faces of the elastic metal strips (6) forms an acute angle with the axis of the coil (3).