High-frequency transformer with novel skeleton structure

Abstract

The utility model relates to the technical field of high-frequency transformers, in particular to a high-frequency transformer with a novel framework structure, which comprises an iron core, a framework and a winding which are matched with one another to form the high-frequency transformer, the winding is provided with an outgoing line, the framework is provided with patch pins, the patch pins are fixedly connected to the framework, and the patch pins and the framework are insulated; the lead-out wire is electrically connected with the patch pin, and the patch pin is used for welding and fixing the transformer on a preset part of an external circuit board, so that the lead-out pin of the winding is electrically connected with the external circuit board through the patch pin. In conclusion, the patch pins of the transformer and the external circuit board can be welded more smoothly and firmly, the outgoing line of the winding can be wound and fixed better, the stability of the transformer is improved, and the service life of the transformer is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of high-frequency transformers, in particular to a high-frequency transformer with a novel skeleton structure. Background Art

[0002] Transformer is a common electrical equipment that can be used in various power supply places. The function of the transformer is to transform the voltage so that the high voltage can be reduced or the low voltage can be increased, ensuring the safety of users and meeting the use requirements of different electrical appliances. There are various transformers on the market, and the SMD transformer is one of them.

[0003] SMD transformers are mainly soldered on circuit boards through SMD pins, but the SMD pins on existing ordinary transformers are directly connected to copper wires, which can easily cause various problems. For example, 1. It is easy to cause uneven soldering; 2. Copper wire stress can easily cause pin displacement; 3. If the product encounters a problem with the pins during repair, it is not easy to identify the specific location of the problem, and the entire product needs to be dismantled during repair, which can easily cause secondary damage.

[0004] In addition, a Chinese patent document with publication number CN207165396U discloses an improved transformer skeleton, comprising a skeleton body, on which a cylindrical pin is provided, the lower end of the pin is fixed in the skeleton body and the upper end is a hollow structure, and the upper end of the pin is provided with an opening that passes through the hollow structure.

[0005] It uses cylindrical pins to fix the copper wire, thereby reducing the number of soldering times, and has certain advancements, but it is not suitable for surface mount devices (SMD) and has certain limitations. Utility Model Content

[0006] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0007] The utility model provides a high-frequency transformer with a novel skeleton structure, comprising an iron core, a skeleton and a winding which cooperate with each other to form a high-frequency transformer, the winding is provided with a lead wire, the skeleton is provided with a patch foot, the patch foot is fixedly connected to the skeleton and is insulated from the skeleton; an electrical connection is formed between the lead wire and the patch foot, the patch foot is used to weld and fix the transformer on a preset position of an external circuit board, so that the lead-out foot of the winding is electrically connected to the external circuit board through the patch foot.

[0008] As a further solution of the utility model: the frame is further provided with an insulating bracket, one end of the insulating bracket is fixedly connected to the frame, and the other end of the insulating bracket is fixedly connected to the patch foot, and the insulating bracket is made of insulating material.

[0009] As a further solution of the utility model: a conductive pin is provided at one end of the insulating bracket away from the skeleton. The conductive pin is made of a conductive material, and the conductive pin is fixedly connected to the insulating bracket. One end of the conductive pin is provided with a wire hanging foot, and the other end is a patch foot. The wire hanging foot is electrically connected to the lead wire.

[0010] As a further solution of the utility model: one end of the wire hanging foot is fixedly connected to the conductive pin, and the other end forms a free end. The free end extends a certain distance in the direction away from the winding, so as to facilitate the winding of the lead wire of the winding.

[0011] As a further solution of the utility model: the length of the wire hanging foot is greater than the length of the patch foot.

[0012] As a further solution of the utility model: the lead wire is wound and sleeved on the wire hanging foot to form an electrical connection.

[0013] As a further solution of the utility model: the lead wire is fixed to the wire hanging foot by welding to form an electrical connection.

[0014] As a further solution of the utility model: the bottom of the iron core is higher than the bottom of the insulating bracket, so as to form a certain gap between the iron core and the external circuit board.

[0015] As a further solution of the utility model: the conductive pin is in a U-shaped shape, so as to be better fixedly connected to the insulating bracket.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. By improving the structure of the skeleton pins, especially by adding the wire hanging foot of the conductive pin, the copper wire can be directly wound on the wire hanging foot, and the patch foot can be directly welded to the solder joints of the external circuit board, making the welding points smoother and firmer. In addition, it can reduce the stress generated by the copper wire on the patch foot, and at the same time, it can also increase the distance from other parts, and the defective points of the product can be better observed.

[0018] 2. The wire hanging foot is also set to extend in the direction away from the winding, so that it can better wind the lead wire, and the copper wire of the lead wire can be more firmly fixed.

[0019] Therefore, through the above improvements, the utility model can provide a high-frequency transformer with a new skeleton structure, making the welding of the patch foot and the external circuit board smoother and firmer, and the lead wire of the winding can also be better wound and fixed, improving its stability and service life.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the side of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the framework and insulating bracket of the utility model;

[0025] Figure 4 It is a schematic diagram of the structure in which the conductive pin and the insulating bracket are separated from each other in the utility model;

[0026] Figure 5 It is a structural schematic diagram of the actual state of the utility model.

[0027] The reference numerals and names in the figures are as follows:

[0028] 10 iron core; 20 skeleton; 30 insulating bracket; 31 first bracket; 32 second bracket; 33 third bracket; 34 fourth bracket; 40 conductive pin; 41 first pin; 42 second pin; 43 hanging pin; 44 patch pin; 50 winding; 51 lead wire. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 5, in the embodiment of the present utility model, a high-frequency transformer with a novel skeleton structure includes an iron core 10, a skeleton 20, and a winding 50 that cooperate with each other to form a high-frequency transformer. The winding 50 is provided with a lead wire 51, and the skeleton 20 is provided with a patch pin 44. The patch pin 44 is fixedly connected to the skeleton 20 and is insulated from the skeleton 20. An electrical connection is formed between the lead wire 51 and the patch pin 44. The patch pin 44 is used to weld and fix the transformer at a preset position on an external circuit board, so that the lead-out pin of the winding 50 is electrically connected to the external circuit board through the patch pin 44.

[0031] Specifically, surface-mount high-frequency transformers are widely used. For example, they can be used as SMD components on the power module PCB, can also be applied to the voltage transformation circuit of smart home appliances, and can also be used as voltage transformation components on industrial circuit boards.

[0032] However, the surface-mount pin positions on existing ordinary transformers are directly connected to copper wires, which easily cause various problems, resulting in the following disadvantages:

[0033] Disadvantage 1: It is easy to have uneven and non-smooth soldering;

[0034] Disadvantage 2: The stress of the copper wire will slightly displace the pin position;

[0035] Disadvantage 3: If there is a problem with the pin position during product repair, it is not easy to identify the problem position. When repairing, the entire product needs to be disassembled, which is likely to cause secondary damage.

[0036] In the present utility model, a row of unique wire-hanging pins 43 is added below the skeleton 20, and a U-shaped or C-shaped structure is formed with the pin positions of the patch pins 44 used for patch operation, so as to be better fixedly connected to the insulating bracket 30. By improving the pin position structure of the skeleton 20 and adding the wire-hanging pins 43 in the middle layer, which are directly used for winding and fixing copper wires, the copper wires do not need to be wound around the patch pins 44. Thus, while reducing the stress of the copper wire on the pin positions of the patch pins 44, the distance from other components can also be increased, and the defective points of the product can be better observed. In particular, it solves the problems such as uneven or non-flat soldering that occur when soldering after the copper wires are wound around the patch pins 44 in the existing products, thereby affecting the welding firmness and the service life of the transformer.

[0037] In addition, by improving the skeleton 20 of the transformer and adding wire-hanging pins 43 that communicate with the patch pins 44, a transformer design with more optimized dimensions and more advanced performance can also be achieved. One end of the wire-hanging pin 43 is fixedly connected to the conductive pin 40, and the other end forms a free end that extends a certain distance away from the winding 50, so as to facilitate the winding of the lead wire 51 of the winding 50.

[0038] Such as Figures 1 to 3As shown, preferably, the frame 20 is further provided with an insulating bracket 30, one end of the insulating bracket 30 is fixedly connected to the frame 20, and the other end of the insulating bracket 30 is fixedly connected to the patch foot 44. The insulating bracket 30 is made of insulating material.

[0039] Specifically, in order to fix the conductive pin 40, an insulating bracket 30 can be provided at the lower end of the frame 20, and the conductive pin 40 can be supported and fixed by the insulating bracket 30 extending outward. Preferably, the insulating bracket 30 and the frame 20 can be made of insulating materials in the prior art and made in one piece by an integrated molding process.

[0040] In addition, multiple insulating brackets 30 can be provided as needed, such as Figure 1 and Figure 3 As shown, a first bracket 31, a second bracket 32, a third bracket 33 and a fourth bracket 34 can be provided to respectively support and fix the lead wires 51 of the multiple groups of windings 50 wound inside the transformer. A plurality of conductive pins 40 can also be provided according to the needs of the transformer, preferably a first pin 41 and a second pin 42 are provided to connect and fix the lead wires and the lead wires of the same winding 50.

[0041] like Figures 1 to 4 As shown, preferably, the end of the insulating bracket 30 away from the frame 20 is provided with a conductive pin 40, the conductive pin 40 is made of a conductive material, the conductive pin 40 is fixed to the insulating bracket 30, one end of the conductive pin 40 is provided with a hanging pin 43, and the other end is set as a patch pin 44, the hanging pin 43 is electrically connected to the lead wire 51. The length of the hanging pin 43 is greater than the length of the patch pin 44.

[0042] Specifically, in order to fix the conductive pin 40, the insulating bracket 30 can be provided with a through hole (not shown in the figure) at the end away from the winding 50, so that the conductive pin 40 can be fixed inside the through hole and exposed at a certain length at the upper and lower ends of the insulating bracket 30, thereby forming corresponding hanging wire pins 43 and patch pins 44.

[0043] Secondly, in order to wind the copper wire, it is preferred to set the length of the wire hanging pin 43 to be relatively long so that the copper wire can be wound around it several times to form a relatively firm connection. The patch pin 44 is directly soldered to the circuit board, so it can be set to be relatively short as long as it matches the solder joint on the circuit board.

[0044] Again, the conductive pin 40 can be made of conductive metal, such as copper sheet, or nickel-plated steel sheet, etc., and can be made into a long strip. After passing through the perforation of the insulating bracket 30, its two ends are bent to form corresponding hanging wire feet 43 and patch feet 44.

[0045] like Figure 1 and Figure 2 As shown, preferably, the lead wire 51 is wound around the wire hanging pin 43 to form an electrical connection. Specifically, the copper wire can be directly wound around the wire hanging pin 43, and the copper wire itself is deformed to form a fixed connection with the wire hanging pin 43, and form an electrical connection.

[0046] like Figure 5 As shown, preferably, the lead wire 51 can also be fixed to the wire hanging pin 43 by welding to form an electrical connection. Of course, in order to further improve the firmness, the copper wire can be wound around the wire hanging pin 43 and can also be welded to ensure its stable connection, small transmission resistance, and improve its service life and performance.

[0047] like Figure 2 As shown, preferably, the bottom of the iron core 10 is higher than the bottom of the insulating bracket 30, so that a certain gap is formed between the iron core 10 and the external circuit board to form a heat dissipation space and improve its heat dissipation capacity.

[0048] Specifically, due to the provision of the insulating bracket 30, the height of the iron core 10 can be appropriately increased so that a certain gap is formed between its bottom and the circuit board, that is, other patch components on the circuit board can be avoided, and the heat dissipation space can be increased, thereby reducing the temperature of the transformer, further improving its working environment, and increasing its service life.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A high-frequency transformer with a new skeleton structure, characterized in that: It includes a core (10), a bobbin (20) and a winding (50) that cooperate with each other to form a high-frequency transformer. The winding (50) is provided with lead wires (51). The bobbin (20) is provided with surface-mount pins (44). The surface-mount pins (44) are fixedly connected to the bobbin (20) and are insulated from the bobbin (20). An electrical connection is formed between the lead wires (51) and the surface-mount pins (44). The surface-mount pins (44) are used to weld and fix the transformer to a preset position on an external circuit board, so that the lead pins of the winding (50) are electrically connected to the external circuit board through the surface-mount pins (44). The bobbin (20) is further provided with an insulating bracket (30). One end of the insulating bracket (30) is fixedly connected to the bobbin (20), and the other end is fixedly connected to the surface-mount pins (44). The insulating bracket (30) is made of an insulating material. A conductive pin (40) is provided at the end of the insulating bracket (30) away from the bobbin (20). The conductive pin (40) is made of a conductive material. The conductive pin (40) is fixedly connected to the insulating bracket (30). One end of the conductive pin (40) is provided with a wire-hanging foot (43), and the other end is a surface-mount pin (44). The wire-hanging foot (43) is electrically connected to the lead wire (51).

2. A high-frequency transformer with a novel skeleton structure according to claim 1, characterized in that: One end of the wire-hanging foot (43) is fixedly connected to the conductive pin (40), and the other end forms a free end. The free end extends a certain distance away from the winding (50), so as to facilitate the winding of the lead wire (51) of the winding (50).

3. A high-frequency transformer with a novel skeleton structure according to claim 1, characterized in that: The length of the wire-hanging foot (43) is greater than the length of the surface-mount pin (44).

4. A high-frequency transformer with a novel skeleton structure according to claim 1, characterized in that: The lead wire (51) is wound around and sleeved on the wire-hanging foot (43) to form an electrical connection.

5. The high-frequency transformer with a novel skeleton structure according to claim 1 is characterized in that: The lead wire (51) is fixedly connected to the wire-hanging foot (43) by welding to form an electrical connection.

6. The high-frequency transformer with a novel skeleton structure according to claim 1 is characterized in that: The bottom of the core (10) is higher than the bottom of the insulating bracket (30), so as to form a certain gap between the core (10) and the external circuit board.

7. The high-frequency transformer with a novel skeleton structure according to claim 1 is characterized in that: The conductive pin (40) is in a U-shaped shape, so as to be better fixedly connected to the insulating bracket (30).

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