Magnetic core grounding structure of transformer, transformer and electronic equipment

Abstract

The utility model provides a magnetic core grounding structure of a transformer, the transformer and electronic equipment. The magnetic core grounding structure of the transformer comprises a winding framework and a magnetic core, a grounding pin and a winding part for mounting a winding are arranged on the winding framework, the grounding pin is provided with a connecting part and a grounding part, the connecting part protrudes out of the surface of the winding framework, and the grounding part extends out of the winding framework; the magnetic core is connected with the winding framework, a connecting groove is formed in the magnetic core, and the connecting part of the grounding pin extends into the connecting groove. According to the magnetic core grounding structure of the transformer, when the winding framework is connected with the magnetic core, the grounding pin can be pressed in the connecting groove of the magnetic core, stable electric connection between the magnetic core and the grounding pin is achieved through the structure of the transformer, materials such as copper foil do not need to be additionally adopted, the structure is simple, and cost is low; and the conductive adhesive in the connecting groove can enable the electrical connection performance of the grounding pin and the magnetic core to be more excellent.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic devices, and particularly relates to a magnetic core grounding structure of a transformer, a transformer and an electronic device. Background Art

[0002] Today, with the rapid development of science and technology, more and more electronic products are developing towards high efficiency, high power density, high reliability and low cost. As the heart of the power supply, transformers are widely used in the power supply drive of electronic products.

[0003] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. It consists of a magnetic core, a skeleton, windings, connection pins and grounding pins. The magnetic core is connected to the skeleton, the winding is wound around the skeleton, the connection pins are electrically connected to the windings, and the grounding pins are connected to the magnetic core to achieve magnetic core grounding. Currently, the connection method between the magnetic core and the grounding pins is usually to wrap the magnetic core with copper foil and then hang the copper foil on the grounding pins through leads. However, wrapping the magnetic core with copper foil will waste a large amount of materials, and the price of copper foil is relatively high, resulting in a relatively high cost. Moreover, the leads need to be manually welded to the copper foil and the grounding pins, resulting in a high labor cost. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a magnetic core grounding structure of a transformer, a transformer and an electronic device.

[0005] An embodiment of the utility model provides a magnetic core grounding structure of a transformer, comprising: a winding skeleton and a magnetic core;

[0006] The winding skeleton is provided with a grounding pin and a winding part for installing the winding. The grounding pin has a connection part and a grounding part. The connection part protrudes from the surface of the winding skeleton, and the grounding part extends out of the winding skeleton.

[0007] The magnetic core is connected to the winding skeleton. A connection groove is provided on the magnetic core. The connection part of the grounding pin extends into the connection groove and abuts against the inner wall of the connection groove.

[0008] In some optional embodiments, a first support plane is formed on the winding skeleton. The connection part extends along the first support plane. A second support plane is formed on the magnetic core. The connection groove extends along the second support plane. When the magnetic core is connected to the winding skeleton, the first support plane abuts against the second support plane.

[0009] In some optional embodiments, the connection groove is filled with conductive glue.

[0010] In some alternative embodiments, a first limiting portion and a second limiting portion are respectively arranged on two sides of the winding bobbin. The grounding pin is arranged on the first limiting portion. The connecting portion extends from the first limiting portion toward one side of the winding bobbin to the surface of the winding bobbin. The grounding portion extends out from one end of the first limiting portion away from the winding bobbin.

[0011] The first limiting portion and the second limiting portion respectively abut against opposite sides of the magnetic core so that the magnetic core is restricted between the first limiting portion and the second limiting portion.

[0012] In some alternative embodiments, a plurality of the grounding pins are arranged on the winding bobbin, and a plurality of connecting grooves are arranged on the magnetic core. The connecting portions of the grounding pins correspondingly extend into the connecting grooves.

[0013] In some alternative embodiments, a limiting groove is arranged on the magnetic core, the connecting groove is arranged in the limiting groove, and at least part of the winding bobbin extends into the limiting groove and is in limiting cooperation with the limiting groove.

[0014] In some alternative embodiments, a limiting post is arranged in the limiting groove, a through hole is arranged on the winding bobbin, and the limiting post penetrates through the through hole.

[0015] In some alternative embodiments, a plurality of wiring pins are arranged on the winding bobbin, and the wiring pins and the grounding pins are respectively arranged on opposite sides of the winding bobbin.

[0016] Compared with the prior art, in the magnetic core grounding structure of the transformer of the present invention, when the winding bobbin and the magnetic core are connected, the grounding pin can be pressed into the connecting groove of the magnetic core, and the stable electrical connection between the magnetic core and the grounding pin is realized by using the structure of the transformer itself, without the need to additionally use materials such as copper foil. The structure is simple and the cost is low. In addition, the conductive adhesive in the connecting groove can make the power connection performance between the grounding pin and the magnetic core better, and the conductive adhesive can also limit the position of the connecting portion.

[0017] Another embodiment of the present invention provides a transformer, including: a winding and a magnetic core grounding structure of a transformer as described above, and the winding is installed on the winding portion of the magnetic core grounding structure of the transformer.

[0018] Another embodiment of the present invention provides an electronic device, including: a transformer as described above.

[0019] In order to more clearly understand the present invention, the specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. Description of the Drawings

[0020] Figure 1 Schematic diagram of the magnetic core grounding structure of a transformer according to an embodiment of the present utility model;

[0021] Figure 2 Exploded view of the magnetic core grounding structure of a transformer according to an embodiment of the present utility model;

[0022] Figure 3 Schematic diagram of one side of a winding skeleton according to an embodiment of the present utility model;

[0023] Figure 4 Schematic diagram of the other side of a winding skeleton according to an embodiment of the present utility model.

[0024] Explanation of reference numerals:

[0025] 10. Winding skeleton; 11. Grounding pin; 111. Connection part; 112. Grounding part; 12. Winding part; 13. First support plane; 14. First limiting part; 15. Second limiting part; 16. Through hole; 17. Wiring pin; 20. Magnetic core; 21. Connection groove; 22. Second support plane; 23. Limiting groove; 24. Limiting post. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, and the meaning of "several" is one or more. In addition, unless otherwise specified, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0028] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "linkage", and "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the description of the present utility model, the description referring to terms such as "one embodiment", "some optional implementation manners", or "some optional embodiments" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0030] In the prior art, the connection method between the magnetic core and the grounding pin is usually to wrap the magnetic core with copper foil and then hang the copper foil on the grounding pin through a lead wire. However, wrapping the magnetic core with copper foil will waste a large amount of materials, and the lead wire needs to be manually welded to the copper foil and the grounding pin, resulting in relatively high material costs and labor costs. In this embodiment, when the skeleton and the magnetic core are connected, the grounding pin can be pressed into the connection groove of the magnetic core, and the stable electrical connection between the magnetic core and the grounding pin can be realized by using the structure of the transformer itself without the need to additionally use materials such as copper foil, with a simple structure and low cost.

[0031] Please refer to Figure 1 , an embodiment of the present utility model provides a magnetic core grounding structure for a transformer, including: a winding skeleton 10 and a magnetic core 20.

[0032] Please also refer to Figure 2 and Figure 3 , the winding skeleton 10 is provided with a grounding pin 11 and a winding portion 12 for winding installation. The grounding pin 11 has a connection portion 111 and a grounding portion 112. The connection portion 111 protrudes from the surface of the winding skeleton 10, and the grounding portion 112 extends outward from the winding skeleton 10. Please refer to Figure 4, a connection groove 21 is provided on the magnetic core 20. The magnetic core 20 is connected to the winding skeleton 10. The connecting portion 111 of the grounding pin 11 extends into the connection groove 21 and abuts against the inner wall of the connection groove 21. Since the connecting portion 111 of the grounding pin 11 can be pressed against the inner wall of the connection groove 21 when the winding skeleton 10 is connected to the magnetic core 20, a stable electrical connection between the grounding pin 11 and the magnetic core 20 can be achieved; moreover, the connection groove 21 can limit the position of the connecting portion 111 to a certain extent, preventing the connecting portion 111 from shifting in position, ensuring stable contact between the connecting portion 111 and the inner wall of the connection groove 21, and improving the electrical connection stability between the magnetic core 20 and the grounding pin 11. Since no additional copper foil or other lead structures are required, the grounding method of the magnetic core 20 is simpler, the overall structure is stable, and the cost is lower.

[0033] In addition, when the magnetic core 20 and the winding skeleton 10 are connected to each other, the docking of the grounding pin 11 and the connection groove 21 can pre-position the magnetic core 20 and the winding skeleton 10 for subsequent assembly.

[0034] Please refer to Figure 2 and Figure 4 , in some alternative embodiments, a first support plane 13 is formed on the winding skeleton 10, and the connecting portion 111 extends along the first support plane 13, enabling the connecting portion 111 to have sufficient length for layout. A second support plane 22 is formed on the magnetic core 20, and the connection groove 21 extends along the second support plane 22, enabling the connection groove 21 to adapt to the size of the connecting portion 111. When the magnetic core 20 is connected to the winding skeleton 10, the first support plane 13 abuts against the second support plane 22, causing the connecting portion 111 to extend into the connection groove 21. Since the connecting portion 111 can extend along the first support plane 13 and the connection groove 21 can extend along the second support plane 22 to reach sufficient length, the contact area between the connecting portion 111 and the inner wall of the connection groove 21 is increased, and the power connection performance between the connecting portion 111 and the connection groove 21 is more stable.

[0035] In some alternative embodiments, a conductive adhesive (not shown in the figure) is filled in the connection groove 21. The conductive adhesive adheres to both the inner wall of the connection groove 21 and the connecting portion 111. Due to the fluid flow characteristics of the conductive adhesive, it can adapt to the shape of the connecting portion 111 and make large-area contact with the connecting portion 111, thereby increasing the power connection area between the inner wall of the connection groove 21 and the connecting portion 111 and making the power connection more stable. Additionally, the conductive adhesive has viscosity, preventing the positions of the connecting portion 111 and the connection groove 21 from easily shifting relative to each other during the use of the transformer and ensuring stable contact between the connecting portion 111 and the connection groove 21.

[0036] Please also refer to Figure 1 and Figure 3, in some alternative embodiments, a first limiting portion 14 and a second limiting portion 15 are respectively provided on two sides of the winding bobbin 10. The grounding pin 11 is provided on the first limiting portion 14, and the connecting portion 111 extends from the first limiting portion 14 toward the side of the winding bobbin 10 to the surface of the winding bobbin 10. Thus, while the connecting portion 111 is stably fixed on the winding bobbin 10, a design in which the connecting portion 111 protrudes from the winding bobbin 10 can be formed. In this embodiment, the connecting portion 111 extends to the first support plane 13.

[0037] The grounding portion 112 extends out from one end of the first limiting portion 14 away from the winding bobbin 10, so that the grounding portion 112 can extend to a position far from the winding bobbin 10. When the winding bobbin 10 and the magnetic core 20 are installed inside the electronic device, the position of the grounding portion 112 facilitates the grounding portion 112 to reach a suitable grounding position, and prevents the grounding portion 112 from being interfered by the structure of the magnetic core 20 or the winding bobbin 10, resulting in inability to install.

[0038] The first limiting portion 14 and the second limiting portion 15 respectively abut against opposite sides of the magnetic core 20. The first limiting portion 14 and the second limiting portion 15 can cooperate to limit the position of the magnetic core 20, so that the magnetic core is restricted between the first limiting portion 14 and the second limiting portion 15, making the position cooperation between the magnetic core 20 and the winding bobbin 10 stable and not easily offset from each other. In addition, while the first limiting portion 14 is positioned and cooperated with the magnetic core 20, the connecting portion 111 of the grounding pin 11 on the first limiting portion 14 can also be positioned with respect to the position of the magnetic core 20, making the position between the connecting portion 111 and the connecting groove 21 not easily offset, and making the contact between the connecting portion 111 and the inner wall of the connecting groove 21 stable.

[0039] In some alternative embodiments, a plurality of grounding pins 11 are provided on the winding bobbin 10, and a plurality of connecting grooves 21 are provided on the magnetic core 20. The connecting portions 111 of the grounding pins 11 correspondingly extend into the connecting grooves 21. Through the cooperation of the plurality of connecting portions 111 and the plurality of connecting grooves 21, the magnetic core 20 is electrically connected to the plurality of grounding pins 11. When any one of the grounding pins 11 fails to be electrically connected to the magnetic core 20, there are other grounding pins 11 that remain electrically connected to the magnetic core 20, thereby preventing the magnetic core 20 from failing to be grounded in case of an accident and affecting the normal operation of the transformer. In addition, in other embodiments, the plurality of grounding pins 11 can also be arranged in the same connecting groove 21, thereby simplifying the structural design of the magnetic core 20 and simplifying the processing procedure of the magnetic core 20.

[0040] Please refer to Figure 2, in some alternative embodiments, a limiting groove 23 is provided on the magnetic core 20, the connecting groove 21 is arranged in the limiting groove 23, at least part of the winding skeleton 10 extends into the limiting groove 23 and is in limiting cooperation with the limiting groove 23. The magnetic core 20 restricts the position of the winding skeleton 10 through the limiting groove 23, so that the magnetic core 20 and the winding skeleton 10 can be stably mated, improving the structural stability, making the connecting portion 111 not easy to shake in the connecting groove 21, and improving the contact stability between the connecting portion 111 and the inner wall of the connecting groove 21. In this embodiment, the second supporting plane 22 is formed on the inner wall of the limiting groove 23.

[0041] Please refer to Figure 2 , in some alternative embodiments, a limiting post 24 is arranged in the limiting groove 23, a through hole 16 is provided on the winding skeleton 10, and the limiting post 24 passes through the through hole 16. The magnetic core 20 further limits the winding skeleton 10 through the limiting post 24, improving the limiting stability of the winding skeleton 10, making the connection between the magnetic core 20 and the winding skeleton 10 stable. Similarly, it can also further improve the contact stability between the connecting portion 111 and the inner wall of the connecting groove 21.

[0042] Please refer to Figure 3 , in some alternative embodiments, a plurality of wiring pins 17 are provided on the winding skeleton 10. The wiring pins 17 and the grounding pin 11 are respectively arranged on opposite sides of the winding skeleton 10. The wiring pins 17 are used for electrically connecting with the windings installed on the winding skeleton 10. When the transformer is installed on the circuit board, the wiring pins 17 and the grounding pin 11 are connected to the corresponding positions on the circuit board. Since the wiring pins 17 and the grounding pin 11 are respectively arranged on both sides of the winding skeleton 10, this facilitates the user to distinguish and identify the wiring pins 17 and the grounding pin 11 to avoid the occurrence of incorrect connection.

[0043] The above magnetic core grounding structure of the transformer can be applied to a transformer, which includes: windings and a magnetic core grounding structure of a transformer as described above, and the windings are installed on the winding portion 12 of the magnetic core grounding structure of the transformer.

[0044] The above transformer can be applied to an electronic device, which includes: the above transformer. In the electronic device, the transformer is usually arranged on the circuit board in the electronic device. The grounding pin 11 and the wiring pins 17 are welded to the hole positions on the circuit board. Of course, the transformer can also adopt other installation methods, not limited to this example.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic core grounding structure for a transformer, characterized in that, Comprising: A winding bobbin and a magnetic core; The winding bobbin is provided with a grounding pin and a winding portion for winding installation. The grounding pin has a connecting portion and a grounding portion. The connecting portion protrudes from the surface of the winding bobbin, and the grounding portion extends out of the winding bobbin; The magnetic core is connected to the winding bobbin. A connecting groove is provided on the magnetic core. The connecting portion of the grounding pin extends into the connecting groove and abuts against the inner wall of the connecting groove.

2. The magnetic core grounding structure of a transformer according to claim 1, characterized in that: A first supporting plane is formed on the winding bobbin, and the connecting portion extends along the first supporting plane. A second supporting plane is formed on the magnetic core, and the connecting groove extends along the second supporting plane. When the magnetic core is connected to the winding bobbin, the first supporting plane abuts against the second supporting plane.

3. The magnetic core grounding structure of a transformer according to claim 1, wherein: The connecting groove is filled with conductive adhesive.

4. A magnetic core grounding structure of a transformer according to claim 1, characterized in that: A first limiting portion and a second limiting portion are respectively provided on two sides of the winding bobbin. The grounding pin is arranged on the first limiting portion. The connecting portion extends from the side of the first limiting portion facing the winding bobbin to the surface of the winding bobbin, and the grounding portion extends out from one end of the first limiting portion away from the winding bobbin; The first limiting portion and the second limiting portion respectively abut against opposite sides of the magnetic core so that the magnetic core is restricted between the first limiting portion and the second limiting portion.

5. The magnetic core grounding structure of a transformer according to claim 1, characterized in that: A plurality of the grounding pins are provided on the winding bobbin, and a plurality of the connecting grooves are provided on the magnetic core. The connecting portions of the grounding pins correspondingly extend into the connecting grooves.

6. A magnetic core grounding structure of a transformer according to any one of claims 1 to 5, characterized in that: A limiting groove is provided on the magnetic core, the connecting groove is arranged in the limiting groove, and at least a part of the winding bobbin extends into the limiting groove and is in limiting cooperation with the limiting groove.

7. A magnetic core grounding structure of a transformer according to claim 6, characterized in that: A limiting post is arranged in the limiting groove, and a through hole is provided on the winding bobbin. The limiting post passes through the through hole.

8. A magnetic core grounding structure of a transformer according to any one of claims 1 to 5, characterized in that: A plurality of wiring pins are provided on the winding bobbin, and the wiring pins and the grounding pins are respectively arranged on opposite sides of the winding bobbin.

9. A transformer, characterized in that, Comprising: A winding and a magnetic core grounding structure of a transformer according to any one of claims 1 to 8, wherein the winding is installed on the winding portion of the magnetic core grounding structure of the transformer.

10. An electronic device, characterized in that, Comprising: A transformer according to claim 9.

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