CN114420409A - Transformer housing assembly, transformer element and method for manufacturing transformer element - Google Patents

Transformer housing assembly, transformer element and method for manufacturing transformer element Download PDF

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Publication number
CN114420409A
CN114420409A CN202210178147.4A CN202210178147A CN114420409A CN 114420409 A CN114420409 A CN 114420409A CN 202210178147 A CN202210178147 A CN 202210178147A CN 114420409 A CN114420409 A CN 114420409A
Authority
CN
China
Prior art keywords
transformer
cavity
conductive terminal
coil
side wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210178147.4A
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Chinese (zh)
Inventor
黄冠基
汤铁衡
卫强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Pumei Electronic Technology Co ltd
Original Assignee
Dongguan Pumei Electronic Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongguan Pumei Electronic Technology Co ltd filed Critical Dongguan Pumei Electronic Technology Co ltd
Priority to CN202210178147.4A priority Critical patent/CN114420409A/en
Publication of CN114420409A publication Critical patent/CN114420409A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/56—Means for preventing chafing or fracture of flexible leads at outlet from coupling part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/023—Soldered or welded connections between cables or wires and terminals

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

The invention discloses a transformer housing assembly, a transformer element and a manufacturing method of the transformer element. The transformer housing subassembly includes the casing, the internal portion of casing is formed with the cavity, casing open-top, the top surface of cavity lateral wall is fitted with a contraceptive ring and is equipped with flange portion, flange portion includes a plurality of archs that are close to the opening interval on two relative cavity lateral wall top surfaces and set up a plurality of reason wire casings that form by protruding interval, keep away from the fixed conductive terminal that is provided with and manages the wire casing one-to-one in open-ended one side on the top surface of bellied relative both sides wall, conductive terminal's first side is provided with the location end foot, conductive terminal's second lateral buckling extends there is the contact site, the contact site is formed with the pad in lateral wall top surface department, on the projection of lateral wall, reason wire casing does not overlap with location end foot. The invention can reduce the influence of the terminal pin on the butt joint when the terminal pin is deformed, thereby preventing the disconnection, improving the reliability of the product, more conveniently realizing the automatic production and reducing the labor cost.

Description

Transformer housing assembly, transformer element and method for manufacturing transformer element
Technical Field
The invention relates to the field of electronic elements, in particular to a transformer housing assembly, a transformer element and a manufacturing method of the transformer element.
Background
Traditional encapsulation shell structure contains inner end foot and outer end foot, and coil is connected to inner end foot, and outer end foot is mainly to realize the SMT paster. The tin immersion is a common process in the transformer industry after the terminal pins are wound, a wound coil is placed in a shell, a coil lead is fixed on the terminal pins in the shell in a winding mode, and the coil lead and the terminal pins in the shell are connected through the tin immersion. The terminal pin winding adopts pure manual winding, the production efficiency is low, and a series of reliability problems such as burn-back and tin bead are easily caused in the tin immersion process.
The existing filtering module structure comprises an insulating base, a plurality of filtering assemblies and a shielding body, wherein a containing chamber for positioning the filtering assemblies is formed in the insulating base, and a plurality of conductive terminals are positioned on the side wall of the containing chamber; the plurality of filtering components are wound with coils, and the head ends of the wound coils are respectively connected to the conductive terminals; the outside of the insulating base body comprises a shield body, and the shield body and external electrical equipment form shielding and isolation. The bottom surfaces of the two side walls of the chamber of the insulating base body are convexly provided with a plurality of convex parts which are arranged at intervals, a wire arranging groove is formed between the convex parts, and the head ends of the coils of the plurality of filter assemblies after being wound are pulled out and penetrate out of the wire arranging groove to be directly welded on the conductive terminals, or the head ends of the coils are firstly wound on the conductive terminals and then are welded and fixed into a whole in a tin immersion mode. A plurality of conductive terminals are integrally formed or assembled and positioned on two side walls of the chamber of the insulating base body by using an embedding and injection mode, a positioning part which can be connected with a preset circuit board is arranged at one side of each conductive terminal, and a contact part which can be exposed out of the bottom surface of the side wall and has a flat welding surface is bent and extended at the other side of each conductive terminal. The flat terminal pin of the structure is used as a bonding pad before the curved pin is formed, the coil lead is spot-welded at the root of the terminal pin, then the curved pin is formed and the pin is cut, and finally the flat terminal pin is dipped in tin and connected and fixed.
However, the existing structure has certain limitations: spot welding is needed firstly and then the curved pin is formed, and a welding knife cannot operate because the space of a welding pad is limited after the curved pin is formed; in the process of forming the bent pin, the welding pad is stretched and bent, and huge impact force is added, so that the welding position of the tail end of the lead is easily damaged; SMD mostly realizes the paster installation through reflow soldering, though the product is fixed by the immersion tin after spot welding, in the reflow soldering process, the welding point that receives the damage can have the risk of broken string after the soldering tin remelting of end foot.
Disclosure of Invention
In order to solve the problems of the prior art, a first object of the present invention is to provide a transformer case assembly capable of reducing the risk of wire breakage and improving the production efficiency.
A second object of the present invention is to provide a transformer element, the system comprising a transformer housing assembly of the first object described above.
A third object of the present invention is to provide a method of manufacturing a transformer element, which is applied to the above-described second object transformer element.
In order to achieve the first purpose, the transformer housing assembly provided by the invention comprises a housing, a cavity is formed in the housing, the top of the housing is provided with an opening, the top surface of the side wall of the cavity is annularly provided with a flange part, the flange part comprises a plurality of bulges which are arranged on the top surfaces of the two opposite side walls of the cavity at intervals and close to the opening, and a plurality of wire arranging grooves which are formed by the bulges at intervals, conductive terminals which are in one-to-one correspondence with the wire arranging grooves are fixedly arranged on one sides, far away from the opening, of the top surfaces of the two opposite side walls provided with the bulges, positioning end pins are arranged on the first sides of the conductive terminals, contact parts are bent and extended on the second sides of the conductive terminals, welding pads are formed on the top surfaces of the side walls of the contact parts, and the wire arranging grooves are not overlapped with the positioning end pins on the projection of the side walls.
It is from top to bottom visible, on the projection of lateral wall, reason wire casing and location end foot do not overlap, in the installation coil subassembly, on the projection of lateral wall, the connection end that the coil was drawn forth does not overlap with location end foot, can be earlier with the crooked foot shaping of location end foot, carries out spot welding and dip-soldering step again, is difficult for damaging the solder joint to flange portion and the setting up of reason wire casing can effectually prevent that the tin pearl from splashing.
In a further aspect, the sidewalls of the cavity are integrally formed with the conductive terminal.
The further scheme is that a mounting hole with an opening on the top surface is formed in the side wall of the cavity, and the conductive terminal is detachably mounted in the mounting hole.
The contact part comprises a connecting body positioned in the side wall of the cavity, and the middle parts of two sides of the connecting body are inwards sunken along the width direction of the connecting body.
Therefore, the contact area between the conductive terminal and the side wall can be effectively increased by the inward recess of the middle parts of the two sides of the connector, so that the conductive terminal is not easy to fall off.
The further proposal is that the shell is made of thermosetting flame-retardant material.
In order to achieve the second object, the present invention provides a transformer element comprising a coil assembly and any one of the above-mentioned transformer housing assemblies, wherein the coil assembly is installed in the cavity, the coil assembly comprises a coil, the coil has a plurality of connection terminals, the connection terminals are fixed on the bonding pad through the wire arrangement groove, and the projection on the side wall is that the connection terminals are not overlapped with the positioning terminal pins.
In order to achieve the third object, the present invention provides a method for manufacturing a transformer element, which is used for manufacturing any one of the transformer elements, and comprises the following steps:
the method comprises the following steps: forming the conductive terminal bent pin, and installing the wound coil assembly in the cavity;
step two: the connecting end of the coil passes through the bonding pad along the wire arranging groove and is fixed on the clamp;
step three: connecting the connecting end of the coil and the bonding pad in a spot welding mode, and removing the connecting end which exceeds the outer edge of the bonding pad;
step four: cutting pins and dipping tin to cover the welding spots.
In conclusion, the projection of the positioning end pin on the side wall and the arrangement of the wire grooves are in a non-overlapping structure, and when the coil assembly is installed, the connecting end pin led out from the coil and the positioning end pin are arranged in a staggered mode, so that the step of forming the bent pin can be executed firstly, and then the operations of spot welding and dip welding are carried out, and the risk of wire breakage of the connecting end pin at the welding position is reduced.
Drawings
Fig. 1 is a perspective view of an embodiment of a transformer housing assembly of the present invention.
Fig. 2 is a top view of an embodiment of the transformer housing assembly of the present invention.
Fig. 3 is a top view of an embodiment of a transformer element of the present invention.
Fig. 4 is a perspective view of a conductive terminal according to an embodiment of the invention.
Detailed Description
Referring to fig. 1 and 2 in combination with fig. 4, the transformer housing assembly of this embodiment includes a square housing 1, the housing 1 is made of a thermosetting flame retardant material, a cavity 2 is formed inside the housing 1, the top of the housing 1 is open, a flange portion 3 is annularly arranged on the top surface of a side wall 4 of the cavity, wherein the flange portion 3 includes a plurality of protrusions 30 arranged on the top surface of two opposite side walls 4 of the cavity at intervals close to the opening, and a plurality of wire management grooves 31 formed by the protrusions 30 at intervals, and conductive terminals 5 corresponding to the wire management grooves 31 one by one are fixedly arranged on one side of the top surface of the two opposite side walls provided with the protrusions 30 away from the opening. Optionally, the side wall of the cavity 2 provided with the conductive terminal 5 is integrally formed with the conductive terminal 5; or the side wall of the cavity 2 is provided with a mounting hole (not shown in the figure) with an opening on the top surface, and the conductive terminal is detachably mounted in the mounting hole.
The first side of the conductive terminal 5 is provided with a positioning terminal pin 50, the second side of the conductive terminal 5 is bent and extended to form a contact part 51, the contact part 51 is located on the top surface of the side wall to form a bonding pad 510, and the wire arrangement groove 31 is not overlapped with the positioning terminal pin 50 on the projection of the side wall.
Referring to fig. 4, the contact part 51 of the present embodiment includes a connection body 511 located inside the cavity sidewall 4, and the middle of both sides of the connection body 511 is recessed inward in the width direction of the connection body 511.
Referring to fig. 3, the transformer element in this embodiment includes the transformer housing assembly described above, the coil assembly 6 is installed in the cavity, the coil assembly 6 includes a coil 61 and a magnet 62, the coil 61 has a plurality of connection terminals 60, after the coil 61 is wound on the magnet 62, the connection terminals 60 are fixed on the bonding pads 510 through the wire arrangement groove 31, and the connection terminals 60 do not overlap with the positioning terminal pins 50 in a projection in the direction of the side wall 4.
The present embodiment also provides a method for manufacturing the transformer element, including the following steps:
the method comprises the following steps: the conductive terminal 5 is bent and formed, and the coil assembly 6 is installed in the cavity 2.
Step two: the connection terminals 60 of the coil 61 are passed through the pads 510 along the wire-arranging grooves and fixed to a jig (not shown).
Step three: the connection terminals 60 of the coil 61 and the pads 510 are connected by spot welding, and the connection terminals 60 beyond the outer edges of the pads 510 are removed.
Alternatively, the connection terminals may be fixed to the pads by conventional spot welding, such as high temperature or mechanical pressure welding of the electrodes.
Step four: cutting pins and dipping tin to cover the welding spots.
In conclusion, the projection of the positioning end pin on the side wall and the line arranging groove are arranged to be of a non-overlapping structure, when the coil assembly is installed, the connecting end pin led out by the coil is not overlapped with the positioning end pin on the projection of the side wall, so that the step of forming the bent pin can be executed firstly, and then the operations of spot welding and dip welding are carried out, and the risk of wire breakage of the connecting end pin at the welding position is reduced.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept also fall within the protection scope of the present invention.

Claims (7)

1. The transformer shell assembly comprises a shell, a cavity is formed in the shell, the top of the shell is provided with an opening, the top surfaces of the side walls of the cavity are annularly provided with flange parts, each flange part comprises a plurality of bulges which are arranged on the top surfaces of the two opposite cavity side walls at intervals and close to the opening, and a plurality of wire arranging grooves which are formed by the bulges at intervals, and conductive terminals which are in one-to-one correspondence with the wire arranging grooves are fixedly arranged on one sides, far away from the opening, of the top surfaces of the two opposite side walls provided with the bulges;
the method is characterized in that:
the first side of the conductive terminal is provided with a positioning end pin, the second side of the conductive terminal is bent and extended to form a contact part, the contact part is positioned on the top surface of the side wall and is provided with a bonding pad, and the wire arrangement groove is not overlapped with the positioning end pin on the projection of the side wall.
2. The transformer enclosure assembly of claim 1, wherein:
the side wall of the cavity and the conductive terminal are integrally formed.
3. The transformer enclosure assembly of claim 1, wherein:
the side wall of the cavity is provided with a mounting hole with an opening on the top surface, and the conductive terminal is detachably mounted in the mounting hole.
4. A transformer enclosure assembly according to any of claims 1 to 3, wherein:
the contact part comprises a connecting body positioned in the side wall of the cavity, and the middle parts of two sides of the connecting body are inwards sunken along the width direction of the connecting body.
5. A transformer enclosure assembly according to any of claims 1 to 3, wherein:
the shell is made of a thermosetting flame-retardant material.
6. A transformer element comprising a transformer housing assembly according to any one of claims 1 to 5 and a coil assembly mounted in the cavity, the coil assembly comprising a coil having a plurality of connection terminals;
the method is characterized in that: the connecting end penetrates through the wire arranging groove to be fixed on the welding disc, and the connecting end does not overlap with the positioning end pin in the projection of the side wall.
7. A method of manufacturing a transformer element, applied to the transformer element of claim 6;
the method is characterized by comprising the following steps:
the method comprises the following steps: forming the conductive terminal bent pin, and installing the wound coil assembly in the cavity;
step two: enabling the connecting end of the coil to penetrate through the bonding pad along the wire arranging groove and fixing the connecting end on a clamp;
step three: connecting the connecting end of the coil and the bonding pad in a spot welding mode, and removing the connecting end which exceeds the outer edge of the bonding pad;
step four: cutting pins and dipping tin to cover the welding spots.
CN202210178147.4A 2022-02-24 2022-02-24 Transformer housing assembly, transformer element and method for manufacturing transformer element Pending CN114420409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210178147.4A CN114420409A (en) 2022-02-24 2022-02-24 Transformer housing assembly, transformer element and method for manufacturing transformer element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210178147.4A CN114420409A (en) 2022-02-24 2022-02-24 Transformer housing assembly, transformer element and method for manufacturing transformer element

Publications (1)

Publication Number Publication Date
CN114420409A true CN114420409A (en) 2022-04-29

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ID=81260895

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210178147.4A Pending CN114420409A (en) 2022-02-24 2022-02-24 Transformer housing assembly, transformer element and method for manufacturing transformer element

Country Status (1)

Country Link
CN (1) CN114420409A (en)

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