CN210984504U

CN210984504U - Improved electromagnetic shielding structure of transformer

Info

Publication number: CN210984504U
Application number: CN201922466990.9U
Authority: CN
Inventors: 苏建彰
Original assignee: Motien Technology Co ltd
Current assignee: Motien Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-10
Anticipated expiration: 2029-12-31

Abstract

An electromagnetic shielding structure improvement of a transformer is mainly characterized in that an insulating tape is wound on the outer edge of an iron core of the transformer, an electromagnetic wave shielding copper foil is wound outside the insulating tape, a containing space for containing the transformer is formed in an insulating shell corresponding to the transformer, a notch part is formed in the containing space corresponding to the electromagnetic wave shielding copper foil, a metal gasket which is in contact with the electromagnetic wave shielding copper foil and electrically conducted is arranged in the notch part corresponding to the electromagnetic wave shielding copper foil, a grounding wire welding surface is arranged on a circuit substrate corresponding to the metal gasket, soldering tin is arranged on the grounding wire welding surface, and the electromagnetic wave shielding copper foil, the metal gasket and the grounding wire welding surface are simultaneously welded, connected and electrically conducted by the soldering tin; therefore, the tolerance between the accommodating space of the insulating housing and the transformer can be increased, and the transformer, the insulating housing and the circuit board can be tightly combined, so that the transformer, the insulating housing and the circuit board can be more easily and conveniently manufactured and assembled, and the practical effect can be improved in the overall implementation.

Description

Improved electromagnetic shielding structure of transformer

Technical Field

The present invention relates to an improved electromagnetic shielding structure of transformer, and more particularly to an improved and innovative design of electromagnetic shielding structure of transformer, which not only increases the tolerance between the accommodating space of the insulating housing and the transformer, but also provides a better tight combination effect between the transformer, the insulating housing and the circuit board, so that the transformer is more simple and convenient in manufacturing and assembly, and the transformer has more practical and effective characteristics in the whole implementation.

Background

Accordingly, it is commonly seen that various transformers are provided in many electronic products, which can perform voltage conversion, circuit isolation, and other operations, and Electromagnetic Interference (EMI) is easily generated during the voltage conversion operation of the transformers, especially when the transformers are used at high frequency, the EMI is more serious, and Electromagnetic radiation affects the layout circuit and electronic components around the circuit; therefore, the transformer is generally grounded to introduce the interference signal into the ground, so as to reduce the electromagnetic interference.

Please refer to the electromagnetic shielding structure of the transformer, No. M578460, which was filed by the applicant in 2019, 5/21, and which is mainly characterized in that a coil group of the transformer extends outward to form a pin electrically connected with a coil, an insulating tape is wound around the outer edge of an iron core, and then an electromagnetic wave shielding copper foil is wound around the iron core, so that the transformer can be accommodated in an accommodating space of an insulating shell, a metal gasket which is in contact electrical conduction is arranged at the bottom end of the accommodating space corresponding to the electromagnetic wave shielding copper foil, each pin of the transformer is connected and conducted with each corresponding contact of a circuit substrate, and the metal gasket is in contact electrical conduction with a welding surface of a connection ground wire of the circuit substrate; therefore, the overall assembly can be faster, the overall assembly stability can be improved, the service life of the product can be prolonged, the electromagnetic interference generated by the transformer can be shielded, the condition influencing the operation of the overall circuit can be prevented, and the practical efficiency characteristic can be improved in the overall implementation and use.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide an improved electromagnetic shielding structure for transformer, which can not only increase the tolerance between the space of the insulating housing and the transformer, but also increase the effect between the transformer, the insulating housing and the circuit board, so that the transformer, the insulating housing and the circuit board can be more easily and conveniently assembled, and the transformer has more practical performance characteristics.

The utility model discloses main purpose and efficiency of electromagnetic shield structural improvement of transformer are reached by following concrete technological means:

it mainly includes transformer, insulating casing and circuit base board; wherein:

the transformer is provided with a coil group in an iron core, a pin extends outwards from the coil group, an insulating tape is wound on the outer edge of the iron core, and an electromagnetic wave shielding copper foil is wound outside the insulating tape;

the insulating shell is internally provided with an accommodating space corresponding to the transformer, the accommodating space is provided with a gap part corresponding to the electromagnetic wave shielding copper foil of the transformer, the gap part is provided with a metal gasket which is electrically conducted in a contact way corresponding to the electromagnetic wave shielding copper foil, and the lower end of the metal gasket is exposed out of the bottom of the insulating shell;

the circuit substrate is provided with contacts which are electrically connected and conducted corresponding to the pins of the transformer, a grounding wire welding surface corresponding to the metal gasket of the insulating shell is arranged on the circuit substrate, soldering tin is arranged on the grounding wire welding surface, and the electromagnetic wave shielding copper foil, the metal gasket and the grounding wire welding surface are simultaneously welded and connected together to be electrically conducted by the soldering tin.

The present invention provides a preferred embodiment of the improved electromagnetic shielding structure of the transformer, wherein the solder can be any one of a spherical shape and a block shape.

The present invention provides a preferred embodiment of the improved electromagnetic shielding structure of the transformer, wherein the solder is in any form of liquid, solid or paste.

Drawings

Fig. 1 is a schematic perspective exploded view of the present invention;

FIG. 2 is a schematic view of a three-dimensional assembly structure of the present invention;

FIG. 3 is a schematic view of the combined cross-sectional structure of the present invention;

reference numerals

1 … transformer

11 … iron core

12 … coil assembly

13 … pin

14 … insulating tape

15 … electromagnetic wave shielding copper foil

2 … insulating case

21 … accommodating space

211 … notch part

22 … Metal gasket

3 … Circuit Board

31 … contact point

32 … ground connection weld face

33 … solder

Detailed Description

In order to make the technical content, the purpose and the efficacy achieved by the present invention more complete and clear, the following detailed description is provided together with the accompanying drawings and figures:

firstly, please refer to fig. 1, a schematic diagram of a three-dimensional exploded structure of the present invention, fig. 2, a schematic diagram of a three-dimensional combined structure of the present invention, and fig. 3, a schematic diagram of a combined cross-sectional structure of the present invention, the present invention mainly includes a transformer 1, an insulating housing 2, and a circuit substrate 3; wherein:

in the transformer 1, a coil assembly 12 is disposed in an iron core 11, a pin 13 extends outward from the coil assembly 12, an insulating tape 14 is wound around the outer edge of the iron core 11, and an electromagnetic shielding copper foil 15 is wound around the insulating tape 14.

The insulating housing 2 is made of an insulating material, an accommodating space 21 is formed in the insulating housing 2 corresponding to the transformer 1 so that the transformer 1 can be accommodated in the accommodating space 21, a gap portion 211 is formed in the accommodating space 21 corresponding to the electromagnetic wave shielding copper foil 15 of the transformer 1, a metal gasket 22 is disposed in the gap portion 211 corresponding to the electromagnetic wave shielding copper foil 15, an upper end of the metal gasket 22 is in contact with the electromagnetic wave shielding copper foil 15 for electrical conduction, and a lower end of the metal gasket 22 is exposed at the bottom of the insulating housing 2.

The circuit substrate 3 is provided with contacts 31 corresponding to the pins 13 of the transformer 1, so that the pins 13 of the transformer 1 are electrically connected and conducted with the corresponding contacts 31, the metal gasket 22 corresponding to the insulating housing 2 on the circuit substrate 3 is provided with a ground connection welding surface 32, the ground connection welding surface 32 is provided with soldering tin 33, the soldering tin 33 can be in a shape of sphere, block or the like, and the soldering tin 33 can be in a shape of liquid, solid, paste or the like.

Therefore, when the present invention is assembled, the transformer 1 is accommodated in the accommodating space 21 of the insulating housing 2, the electromagnetic shielding copper foil 15 of the transformer 1 contacts with the metal gasket 22 of the gap portion 211 of the insulating housing 2, and the insulation housing 2 and the transformer 1 are disposed on the circuit substrate 3, so that each pin 13 of the transformer 1 is electrically connected and conducted with each corresponding contact 31, and the metal gasket 22 of the insulating housing 2 is contacted with the ground connection bonding Surface 32 of the circuit substrate 3, and in the Surface Mount Technology (SMT) operation, at a certain temperature, the solder 33 on the land bonding surface 32 is melted so that the solder 33 simultaneously connects and electrically connects the electromagnetic shielding copper foil 15, the metal pad 22 and the land bonding surface 32.

In operation, if electromagnetic interference occurs during the voltage conversion operation of the transformer 1, the generated electromagnetic interference is conducted from the electromagnetic shielding copper foil 15 of the ferromagnetic core 11 to the metal gasket 22 of the insulating casing 2, and then conducted to the ground through the grounding connection welding surface 32 of the circuit substrate 3 by the metal gasket 22, so as to shield the electromagnetic interference generated by the transformer 1 and prevent the electromagnetic interference from affecting the circuit operation.

Through the aforesaid, the utility model discloses the constitution of structure can be known with the use implementation description, the utility model discloses compare with current structure down, the utility model discloses mainly have following advantage:

1. the utility model discloses when combining, it utilizes soldering tin to shield this electromagnetic wave copper foil, metal gasket and ground connection line face of weld in the lump welding connection electrical property simultaneously and switches on for do not need closely to cooperate between the accommodation space that can let insulating casing and transformer, can let its tolerance value grow each other, make it more simple and easy convenience on the preparation equipment.

2. The utility model discloses when combining, it utilizes soldering tin to shield this electromagnetic wave copper foil, metal gasket and earth connection line face of weld in the lump welding and connects the electrical property and switch on for let have better inseparable combination effect between transformer, insulating casing and the circuit board, and increase practical efficiency characteristic person more in its whole implementation use.

Claims

1. The improved electromagnetic shielding structure of the transformer is characterized in that the structure comprises the transformer, an insulating shell and a circuit substrate; wherein:

2. An improved transformer electromagnetic shielding structure as defined in claim 1, wherein the solder is in any one of a ball shape and a block shape.

3. An improved transformer electromagnetic shielding structure as defined in claim 1, wherein the solder is in any one of a liquid state, a solid state and a paste state.