A packaged transformer and charger in compliance with regulatory distance

Abstract

This utility model relates to the field of transformer technology, and in particular to a packaged transformer and charger that comply with safety regulations regarding creepage distance. The packaged transformer, complying with safety regulations, includes a frame with pin sockets and a core socket formed thereon; a core is fitted onto the core socket, with its center passing through the core socket; a coil is wound around the core socket; the coil's pins are connected to pins on the pin socket; a shell encloses the frame, with insulating adhesive filling the space between the shell and the frame; and the pin sockets extend from the shell. After the shell encloses the frame, the pin sockets extend from the shell, and the pins are mounted on the pin sockets. This design ensures that the creepage path between the two rows of pins is not straight, lengthening the creepage distance with a fixed size, which is beneficial for ensuring safety and device miniaturization. The insulating adhesive also improves the internal insulation level of the transformer, resulting in better safety.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a packaged transformer and charger that meet safety regulations. Background Technology

[0002] The creepage distance of a small transformer refers to the shortest path length between two conductive parts measured along the insulation surface. The main purpose of creepage distance is to prevent surface breakdown or arcing under high voltage, ensuring the safe operation of the equipment.

[0003] With a fixed size, some small transformers have their housings encapsulating the transformer, with the pins extending from the same side of the housing. This causes the creepage path between the two sets of pins to become a straight line, resulting in a shorter creepage distance and affecting safety.

[0004] For example, Chinese patent application number CN202020441590.2 discloses a small transformer, specifically stating that "the tops of several pins extend into the receiving space and are electrically connected to the coil, the bottoms of the pins extend below the bottom and are electrically connected to other electrical components. The coil is electrically connected to other electrical components through the pins." This design causes the creepage path between the two sets of pins to become a straight line, resulting in a shorter creepage distance and affecting safety.

[0005] For example, Chinese patent application number CN202222582341.7, a drop-proof miniature transformer, specifically discloses that "the bottom of the charger housing has two pins." This design causes the creepage path between the two sets of pins to become a straight line, which in turn shortens the creepage distance and affects safety. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a packaged transformer that meets safety regulations regarding creepage distance. After packaging, the creepage path between the pins is not straight, and the creepage distance meets safety requirements, thus ensuring safety and overcoming the shortcomings of the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This application provides a packaged transformer that complies with safety distance regulations, including a frame on which pin sockets and a core socket are formed; a core is fitted onto the core socket, with the middle portion of the core passing through the core socket; a coil is wound around the core socket; the pins of the coil are connected to pins on the pin socket; a housing encloses the frame, and insulating adhesive is filled between the housing and the frame; the pin socket extends from the housing.

[0009] Preferably, a partition is provided on the outer side of the pin socket; the pin passes by the partition; and the pins are soldered or crimped together.

[0010] Preferably, the pins extend from the bottom or outer side of the pin socket.

[0011] Preferably, a first limiting portion is formed on the magnetic core holder, and a bayonet is formed between the first limiting portion and the pin holder; the frame portion of the magnetic core is fitted onto the bayonet.

[0012] Preferably, the magnetic core includes an E-type magnetic core and a first insulating paper, with two sets of E-type magnetic cores closed together and the first insulating paper wrapping the E-type magnetic core.

[0013] Preferably, a plurality of pin seats are formed on the pin socket, and the pins are disposed on the pin seats; support blocks extend from the pin seats at the corner positions.

[0014] Preferably, the creepage path S between the left and right rows of pins includes S1, S2, S3, S4, and S5 connected vertically in sequence.

[0015] Preferably, the insulating adhesive is one of silicone sealant, epoxy resin, or polyurethane sealant.

[0016] Preferably, the skeleton is made of one of the following materials: nylon, polystyrene, or polyamide.

[0017] This application provides a charger, including a packaged transformer that conforms to safety regulations, the packaged transformer being soldered to a circuit board, and the packaged transformer and the circuit board being housed within a protective casing.

[0018] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, after the outer shell covers the skeleton, the pin socket extends from the outer shell, and the pins are set on the pin socket. This design makes the creepage path between the two rows of pins not a straight line, which lengthens the creepage distance under fixed size conditions, thus helping to ensure safety.

[0019] The insulating adhesive improves the insulation level inside the transformer, resulting in better safety. Attached Figure Description

[0020] Figure 1 This is an overall schematic diagram of one embodiment of the present utility model.

[0021] Figure 2 This is a side view of one embodiment of the present invention.

[0022] Figure 3 This is an exploded view of one embodiment of the present invention.

[0023] Figure 4 This is an exploded view of one embodiment of the present invention.

[0024] Figure 5 This is one embodiment of the present utility model. Figure 2 Schematic diagram of cross-section A_A.

[0025] Explanation of reference numerals in the attached diagram:

[0026] 10. Frame; 11. Pin socket; 12. Divider; 13. Pin socket; 14. Pin; 15. Core socket; 16. First limiting part; 17. Bayonet; 18. Support block; 20. Coil; 21. Pin; 23. Core; 24. E-type core; 25. First insulating tape; 26. Second insulating tape; 30. Outer shell; 31. Insulating adhesive. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0028] Example 1

[0029] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, which is a packaged transformer that complies with safety regulations regarding distance.

[0030] After the transformer is encapsulated in the housing, the pin base 11 extends out from the outer shell 30, and the pins 14 are set in the pin base 11. In this way, the creepage distance between the two rows of pins 21 is not a straight line. While keeping the transformer size unchanged, the creepage path S side is lengthened to ensure safety.

[0031] This application provides a packaged transformer that complies with safety distance regulations, including a frame 10 on which pin holders 11 and core holders 15 are formed; a core 23 is fitted onto the core holder 15, with the middle portion of the core 23 passing through the core holder 15; a coil 20 is wound around the core holder 15; the pins 21 of the coil 20 are connected to the pins 14 on the pin holder 11; a housing 30 encloses the frame 10, and insulating adhesive 31 is filled between the housing 30 and the frame 10; the pin holders 11 extend from the housing 30.

[0032] The frame 10 is insulated, and the pin holder 11 and core holder 15 are preferably integrally formed using injection molding. During production, the coil 20 is first wound around the core holder 15, then two sets of E-type cores 24 are closed together, and then the first insulating adhesive 31 and paper 25 are used to bond the two sets of E-type cores 24 together, thereby assembling the core 23 and the core holder 15 together. The insulating adhesive 31 fills the space between the outer shell 30 and the frame 10, improving the insulation level inside the transformer and increasing safety. At the same time, the insulating adhesive 31 also improves the transformer's moisture-proof and waterproof capabilities. The pin holder 11 extends from the outer shell 30, and the pins 14 are set on the pin holder 11. This results in a non-linear creepage distance S between the pins 14, lengthening the creepage distance and improving safety. The outer shell 30 is also made of insulating plastic. The core is preferably one of the following: ferrite core, magnetic material core, ferromagnetic alloy core, iron powder core, manganese-zinc ferrite, nickel-zinc ferrite, or iron-silicon-aluminum core.

[0033] Preferably, a separator 12 is provided on the outer surface of the pin holder 11; the pin 21 passes beside the separator 12; the pin 14 is soldered or crimped together with the pin 14. The separator 12 is cylindrical or square. The separator 12 serves to separate different pins 21, thus playing a role in cable management and positioning.

[0034] Preferably, the pins 14 extend from the bottom or outer side of the pin base 11. In this embodiment, the pins 14 extend from the bottom of the pin base 11, and it can be seen that the creepage path between the two rows of pins 14 is not straight, the creepage path is longer, and the safety is better.

[0035] Preferably, a first limiting portion 16 is formed on the magnetic core holder 15, and a bayonet 17 is formed between the first limiting portion 16 and the pin holder 11; the frame portion of the magnetic core 23 is fitted onto the bayonet 17. After the two sets of E-type magnetic cores 24 are closed together, the frame portion of the magnetic core 23 is fitted onto the bayonet 17, and the middle portion of the magnetic core 23 passes through the magnetic core holder 15. Then, the first insulating adhesive 31 and paper 25 are used to bond the two sets of E-type magnetic cores 24 together. This assembly method is very simple. In this embodiment, the coil 20 is wrapped with a second insulating adhesive paper 26 to improve safety.

[0036] Preferably, a plurality of pin seats 13 are formed on the pin base 11, and pins 14 are disposed on the pin seats 13; support blocks 18 extend from the pin seats 13 at the corners. The pins 14 can be disposed on the pin base 11 by injection molding or plug-in method. The support blocks 18 can play a role in installation positioning and support, making the frame 10 easier to install.

[0037] Preferably, the creepage path S between the left and right rows of pins 14 includes S1, S2, S3, S4, and S5 connected vertically in sequence. As can be seen, the creepage path S resembles a digital wave shape, such as a non-return-to-zero or return-to-zero wave shape. Thus, the creepage path S is non-linear, resulting in a longer creepage path and better safety.

[0038] Preferably, the insulating adhesive 31 is one of silicone adhesive, epoxy resin, or polyurethane adhesive. In this embodiment, epoxy resin is preferred because it has excellent insulation properties.

[0039] Preferably, the skeleton 10 is made of one of the following materials: nylon, polystyrene, and polyamide. The skeleton 10 can also be other insulating plastics, not limited to the above materials.

[0040] Example 2

[0041] This application provides a charger including a packaged transformer that conforms to safety regulations. The packaged transformer is soldered to a circuit board, and the packaged transformer and the circuit board are housed within a protective casing. This packaged transformer contributes to the miniaturization of the charger while ensuring safety.

[0042] In summary, the key design feature of this utility model is that after the outer shell 30 encloses the skeleton 10, the pin base 11 extends from the insulating adhesive 31, and the pins 14 are set on the pin base 11. Therefore, the creepage path between the two rows of pins 21 is not a straight line. With a fixed size, the creepage distance is lengthened, which is beneficial to ensuring safety.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A packaged transformer that complies with regulatory distances, characterized by: Includes a frame on which pin holders and a core holder are formed; The magnetic core is fitted onto the magnetic core holder, with the middle part of the magnetic core passing through the magnetic core holder; the coil is wound around the magnetic core holder; the coil leads are connected to the pins on the lead holder. The housing encloses the skeleton, and insulating adhesive is filled between the housing and the skeleton; the pin socket extends from the housing; A partition is provided on the outer side of the pin socket; the pin passes by the partition; the pins are soldered or crimped together with each other.

2. A packaged transformer meeting safety clearance distances according to claim 1, characterized in that: The pins extend from the bottom or outer side of the pin socket.

3. A safety distance compliant encapsulated transformer according to claim 1, characterized in that: A first limiting part is formed on the magnetic core holder, and a bayonet is formed between the first limiting part and the pin holder; the frame part of the magnetic core is fitted onto the bayonet.

4. A packaged transformer meeting safety clearance distances according to claim 1 or 3, characterized in that: The magnetic core includes an E-type magnetic core and a first insulating paper. Two sets of E-type magnetic cores are closed together, and the first insulating paper wraps the E-type magnetic core.

5. The safety distance compliant encapsulated transformer of claim 1, wherein: The pin socket has several pin seats, and the pins are set on the pin seats; support blocks extend from the pin seats at the corners.

6. A safety distance compliant encapsulated transformer according to claim 1, characterized in that: The creepage path S between the left and right rows of pins includes S1, S2, S3, S4, and S5, which are connected vertically in sequence.

7. A safety distance compliant encapsulated transformer according to claim 1, characterized in that: Insulating adhesive is one of the following: silicone adhesive, epoxy resin, and polyurethane adhesive.

8. A safety distance compliant encapsulated transformer according to claim 1, characterized in that: The skeleton is made of one of the following materials: nylon, polystyrene, or polyamide.

9. A charger characterized by: Includes a packaged transformer conforming to safety distances according to any one of claims 1-8, the packaged transformer being soldered to a circuit board, the packaged transformer and the circuit board being within a protective housing.

Images