CN211980393U

CN211980393U - Transformer framework, transformer and power adapter

Info

Publication number: CN211980393U
Application number: CN202020553949.5U
Authority: CN
Inventors: 罗晓武; 徐加红
Original assignee: Shenzhen Huntkey Electric Co Ltd
Current assignee: Shenzhen Huntkey Electric Co Ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-11-20
Anticipated expiration: 2030-04-14

Abstract

The application provides a transformer skeleton, transformer and power adapter, transformer skeleton includes: the base is arranged at the bottom of the winding post; the first pins are arranged on the left side of the lower surface of the base; the second pins are arranged on the right side of the lower surface of the base; the lower surface of base is close to first stitch with second stitch department still is equipped with package assembly, and package assembly constitutes the plane of difference in height with the base. The application provides a transformer skeleton, when the transformer that corresponds was inserted on the circuit board, because equipment plane and circuit board laminating mutually, like this, just eliminated because of soldering tin high position difference, the tin point is not of uniform size and lead to with the unable problem of closely laminating of circuit board, the transformer and the power adapter that adopt this transformer skeleton are good in reliability, can satisfy the requirement of ann's rule authentication.

Description

Transformer framework, transformer and power adapter

Technical Field

The application belongs to the technical field of transformers, and particularly relates to a transformer framework, a transformer and a power adapter.

Background

The transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction, and the transformer framework is used for providing a space for winding a primary coil and a secondary coil and can be used for fixing a magnetic core of the transformer. After transformer skeleton twines the wire rod, need twine the end of a thread and soldering tin on the pin, because the soldering tin position is different, it is not of uniform size to form the tin point behind the soldering tin, lead to the transformer to insert on the PCB board, the phenomenon of unevenness can appear, when carrying out the complete machine test (if drop the experiment) to power adapter, the transformer may drop from the PCB board, or certain pin and PCB's electric contact is bad, lead to the electrical property to go wrong, or the test number of times is not passed through, the product yield is lower, be difficult to accord with the ann rule requirement.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a transformer framework to solve the technical problem that in the prior art, because soldering positions are different, a transformer is inserted on a circuit board and is uneven, and then the product yield is low.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: there is provided a transformer bobbin comprising:

the base is arranged at the bottom of the winding post;

the first pins are arranged on the left side of the lower surface of the base;

the second pins are arranged on the right side of the lower surface of the base;

the lower surface of the base is close to the first pins and the second pins, and assembling structures are further arranged on the lower surface of the base and form planes with different heights.

Optionally, the assembly structure comprises: the first heightening plate is arranged close to the first pin, and the second heightening plate is arranged close to the second pin; the first heightening plate and the second heightening plate are the same in height and smaller than the length of the first pin.

Optionally, the first heightening plates comprise 2 heightening plates respectively arranged at both ends of the plurality of first pins; the second heightening plates comprise 2 heightening plates which are respectively arranged at two ends of the second pins.

Optionally, the height of the first raised plate and the second raised plate is greater than or equal to 2.5 mm.

Optionally, a distance between the first heightening plate and the nearest first stitch is less than or equal to 1mm, and a distance between the second heightening plate and the nearest second stitch is less than or equal to 1 mm.

Optionally, the assembly structure comprises: and the accommodating groove is arranged close to the first pin or the second pin.

Optionally, the depths of the receiving grooves are all equal or partially equal.

Optionally, the depth of the accommodating groove is greater than or equal to 2.5 mm.

It is a further object of the present application to provide a transformer comprising the transformer bobbin described above.

Another objective of the present application is to provide a power adapter, which includes the transformer, the transformer is inserted into a circuit board of the power adapter, and an assembly structure of the transformer or a base of the transformer is attached to the circuit board.

The application provides a transformer skeleton's beneficial effect lies in: compared with the prior art, this application transformer skeleton is equipped with package assembly at the lower surface of base, constitute the plane of difference in height between this package assembly and the base, and form the equipment plane when being used for transformer equipment, when the transformer that corresponds is inserted on the circuit board, because the equipment plane laminates mutually with the circuit board, like this, just eliminated because of soldering tin high position difference, the unable closely problem of laminating with the circuit board that leads to of tin point size difference, the transformer and the power adapter that adopt this transformer skeleton are good in reliability, can satisfy the requirement of safety regulation authentication.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a perspective view of a transformer bobbin (second pin not shown) provided in an embodiment of the present application;

fig. 2 is an assembly diagram of a transformer (not shown with windings) and a circuit board according to an embodiment of the present disclosure;

fig. 3 is a perspective view of a transformer bobbin (second pin not shown) provided in another embodiment of the present application;

fig. 4 is a schematic diagram illustrating an assembly of a transformer (not shown with windings) and a circuit board according to another embodiment of the present application;

fig. 5 is an enlarged view of a portion a in fig. 3.

Wherein, in the figures, the respective reference numerals:

10-transformer bobbin; 20-a circuit board; 100-wrapping posts; 200-a base; 310-a first stitch; 320-a second stitch; 210-a first raised plate; 220-a second heightening plate; 230-a receiving groove; 240-first wire chase.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application 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 merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and fig. 2 together, a transformer bobbin 10 according to an embodiment of the present application will be described. The transformer bobbin 10 includes a winding post 100, a base 200, a plurality of first pins 310 and a plurality of second pins 320. The winding post 100 is a hollow structure, and a magnetic core can be arranged on the transformer framework 10; the base 200 is disposed at the bottom of the winding post 100, the base 200 is divided into a left portion and a right portion, the two portions are disposed oppositely, and the base 200 and the winding post 100 can be integrally formed. A plurality of first pins 310 are arranged on the left side of the lower surface of the base 200, wherein at least two first pins 310 are used for winding and fixing wires of the primary winding, and the wires are welded on the corresponding first pins 310; a plurality of second pins 320 are disposed on the right side of the lower surface of the base 200, wherein at least two second pins 320 are used for winding and fixing the wires of the secondary winding, and the wires are soldered on the corresponding second pins 320. The lower surface of the base 200 is further provided with an assembly structure near the first pins 310 and the second pins 320, the assembly structure and the base 200 form planes with different heights, one of the planes forms an assembly plane, and the assembly plane is attached to the circuit board 20 when the corresponding transformer is inserted on the circuit board 20, that is, the assembly plane is attached to the circuit board 20 when one end of each of the first pins 310 and each of the second pins 320 is inserted on the circuit board 20. During assembly, the bottom ends of all pins are fixedly inserted into the circuit board 20, and due to the fact that the base 200 is provided with the assembly structure, the uneven phenomenon of the transformer socket caused by different soldering positions of the pins after soldering can be effectively avoided when the circuit board 20 is used.

The application provides a transformer skeleton 10, compared with the prior art, lower surface at base 200 is equipped with package assembly, constitute the plane of difference in height between this package assembly and the base 200, and form the equipment plane when being used for the transformer equipment, when the transformer that corresponds is inserted on circuit board 20, because the equipment plane laminates mutually with circuit board 20, thus, just, the problem of can't closely laminating with circuit board 20 because of soldering tin high position is different, that the tin point is not of uniform size leads to has been eliminated, the transformer and the power adapter reliability that adopt this transformer skeleton 10 are good, can satisfy the requirement of safety regulation authentication.

In order to improve the stability of the transformer after assembly, the transformer can be designed from two directions, one is to heighten the base 200 to prevent the soldering points of the pins from contacting the circuit board 20, the other is to make a sinking design near the pins to form a groove body, and the winding part and the soldering points are hidden in the groove body, so that effective assembly planes can be formed by the two modes, a stable assembly structure can be formed after assembly, and the cost increased by the tight adhesion of the transformer bottom and the circuit board 20 through glue dispensing can be saved. The lower surface of the base 200 is provided with pins, which can be flush with the height of the assembled magnetic core and can be higher than the assembled magnetic core.

Example one

Referring to fig. 1 and 2, the assembly structure includes a first heightening plate 210 and a second heightening plate 220, the first heightening plate 210 is disposed near the first pin 310, the second heightening plate 220 is disposed near the second pin 320, and the heights of the first heightening plate 210 and the second heightening plate 220 are the same. That is to say, the side of the base 200 corresponding to the first pin 310 and the second pin 320 is respectively provided with a heightening plate, the length of the first pin 310 is equal to the length of the second pin 320, the height of the heightening plate is set to be smaller than the length of the first pin 310, the heightening plates jointly form an assembly structure, and the bottom surfaces of the heightening plates jointly form an assembly plane.

If the primary winding fixed on the first pin 310 has a larger wire diameter and needs to be wound by a plurality of turns, the welding point of the first pin 310 may be higher, so that the heightening plate is arranged at the first pin 310, the welding point of the heightening plate is controlled not to exceed the heightening plate, the circuit board of the adaptor can be attached to the heightening plate, and the height of the transformer in the circuit board of the adaptor in the inserting process cannot be uneven due to different high and low positions of the welding point. The raised plate on the first stitch 310 side of the bottom surface of the base 200 may be provided with a plurality of narrow plates, or may be provided with only one wide plate.

When a wide heightening plate is arranged at the first pin 310 of the base 200, the same heightening plate is also arranged at the second pin 320, so that the left heightening plate and the right heightening plate have the same height, the left balance and the right balance of the transformer are ensured, and the whole transformer framework 10 has two heightening plates. The width of the wide raised plate may be set to a distance between the two first pins 310 located at the outermost side.

When the first pin 310 of the base 200 is provided with 2 narrow heightening plates, the second pin 320 is also provided with the same 2 narrow heightening plates, so that the heights of the heightening plates are the same, the left and right balance of the heightening plates is ensured, the whole framework is provided with 4 heightening plates, the heightening plates are arranged to increase the stability after being spliced and assembled with the circuit board 20, and the two sides of the heightened plate are stressed uniformly after being spliced and assembled and are not easy to loosen and fall off. In an embodiment, referring to fig. 1 and 2, the heights of the first heightening plate 210 and the second heightening plate 220 are both set to be greater than or equal to 2.5mm, so that the requirements of wire winding and soldering can be effectively met, the height positions of soldering points of the wire winding part are both smaller than those of the heightening plates, a similar hiding effect can be achieved, when the corresponding transformer is inserted into the circuit board 20, the soldering points do not contact with the circuit board 20, and the bottom surfaces of the heightening plates are attached to the circuit board 20.

In one embodiment, referring to fig. 1 and 2, the distance between the first raised plate 210 and the nearest first stitch 310 is less than or equal to 1 mm. In this case, the first heightening plate 210 has a better solder flow preventing effect. It is understood that the distance between the second raised plate 220 and the nearest second pin 320 is also set to be 1mm or less.

Example two

Referring to fig. 3 and 4, the assembly structure includes an accommodating groove 230 disposed near the first pin 310 or the second pin 320, that is, the accommodating groove 230 is recessed near the first pin 310 or the second pin 320 on the lower surface of the base 200, the accommodating groove 230 is used for accommodating the wires wound around the winding of the first pin 310 or the second pin 320 and the corresponding soldering points, the lower surface of the base 200 forms an assembly plane, that is, the wires and the soldering points wound around the corresponding pins are hidden in the accommodating groove 230, when the corresponding transformer is inserted into the circuit board 20 for assembly, the soldering points will not contact the circuit board 20, and the lower surface of the base 200 is attached to the circuit board 20.

Referring to fig. 3 and 4, the lower surface of the base 200 may be higher in the position of the pins than the assembled magnetic core; if the wire diameter of the secondary winding fixed on the second pin 320 is larger, the solder point of the second pin 320 may be higher, so that the accommodating groove is disposed at the second pin 320, and the solder point is controlled not to exceed the base 200, so that the base 200 can be attached to the circuit board of the adapter, and the transformer and the circuit board of the adapter are not uneven when being plugged due to different heights and positions of the solder point.

According to actual needs, the accommodating grooves 230 may be formed at the pins with the possibly high welding points, that is, the required accommodating grooves 230 are formed at one side or both sides of the lower surface of the base 200, the winding of each first pin 310 is disposed in the corresponding accommodating groove 230, and the winding of each second pin 320 is disposed in the corresponding accommodating groove 230.

Referring to fig. 3 and 5, the bottom surface of the base 200 is recessed to form the receiving grooves 230 at positions corresponding to the first pins 310 and the second pins 320, and the depths of the receiving grooves 230 are equal or partially equal. A first line groove 240 is formed between two adjacent first pins 310 on the outer side of the base 200, a first gap is formed on one side of the accommodating groove 230 close to the first line groove 240, and the accommodating groove 230 is communicated with the first line groove 240 through the first gap; a second wire slot is formed between two adjacent second pins 320 on the outer side of the base 200, a second notch is formed in one side of the accommodating groove 230 close to the second wire slot, and the accommodating groove 230 is communicated with the second wire slot through the second notch.

In an embodiment, referring to fig. 3, the depth of the receiving groove 230 is set to be greater than or equal to 2.5mm, so that the corresponding wires and solder points can be effectively hidden in the receiving groove 230, and the wires and the solder points are prevented from contacting the circuit board 20 during the plugging assembly.

EXAMPLE III

The transformer provided by the embodiment of the application comprises the transformer framework 10 of the embodiment. A magnetic core may be installed inside the winding post 100, and a multi-layered primary coil and a secondary coil may be wound on the winding post 100.

The power adapter provided by the embodiment of the application comprises the transformer of the embodiment. As shown in fig. 2 and 4, the transformer is plugged into the circuit board 20 of the power adapter, and the assembly structure of the transformer or the base 200 of the transformer is attached to the circuit board 20. The assembly plane formed on the transformer framework 10 is attached to the circuit board 20 in the power adapter, so that the product can pass the whole machine test, such as a drop test, and the product yield is high.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A transformer skeleton which characterized in that: the method comprises the following steps:

the base is arranged at the bottom of the winding post;

the first pins are arranged on the left side of the lower surface of the base;

2. The transformer skeleton of claim 1, wherein: the assembly structure includes: the first heightening plate is arranged close to the first pin, and the second heightening plate is arranged close to the second pin; the first heightening plate and the second heightening plate are the same in height and smaller than the length of the first pin.

3. The transformer skeleton of claim 2, wherein: the first heightening plates comprise 2 heightening plates which are respectively arranged at two ends of the first pins; the second heightening plates comprise 2 heightening plates which are respectively arranged at two ends of the second pins.

4. The transformer skeleton of claim 2, wherein: the height of the first heightening plate and the second heightening plate is more than or equal to 2.5 mm.

5. The transformer skeleton of claim 2, wherein: the distance between the first heightening plate and the nearest first stitch is smaller than or equal to 1mm, and the distance between the second heightening plate and the nearest second stitch is smaller than or equal to 1 mm.

6. The transformer skeleton of claim 1, wherein: the assembly structure includes: and the accommodating groove is arranged close to the first pin or the second pin.

7. The transformer skeleton of claim 6, wherein: the depth of each containing groove is equal or partially equal.

8. The transformer skeleton of claim 6, wherein: the depth of the containing groove is more than or equal to 2.5 mm.

9. A transformer, characterized by: comprising the transformer skeleton of any one of claims 1 to 8.

10. A power adapter, characterized by: the transformer of claim 9, wherein the transformer is plugged into a circuit board of the power adapter, and the assembly structure of the transformer or the base of the transformer is attached to the circuit board.