Transformer based on planar PCB winding

Abstract

The utility model belongs to the technical field of transformers, and particularly relates to a transformer based on a planar PCB winding, which comprises a first magnetic core, a second magnetic core and a PCB winding arranged between the first magnetic core and the second magnetic core. The edge of the PCB winding extending out of the first magnetic core and the second magnetic core is provided with a bonding pad, and the position of the bonding pad is flush with the end, away from the second magnetic core, of the first magnetic core. According to the utility model, the improved guide pin structure is adopted, so that the overall production efficiency of the transformer is improved while the guide pin assembly procedures are reduced; by adopting the boss structure, the structure arrangement that a PCB is provided with a hole and sinks a magnetic core is omitted, and the installation efficiency of the transformer is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformers, and in particular relates to a transformer based on a planar PCB winding. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Existing planar (flat) transformers use PCB windings, which have the following two problems:

[0004] (1) A hole is opened on the transformer PCB winding tail line, and then a pin is soldered to form a PIN as the foot of the winding; the other end of the pin is soldered to the hole or pad on the PCB board of the whole machine. However, this solution requires the pin to be fixed on the PCB winding during the transformer production process, which requires more complex positioning tooling, making the manufacturing difficulty increased; at the same time, when soldering the pin, it is easy for the tin to not penetrate. Multiple tinning can easily make the PCB black, and even damage the wiring inside the PCB winding due to multiple high temperatures.

[0005] (2) The tail wire of the transformer PCB winding is led out to the surface of the transformer PCB, and the pad style is used as the foot of the winding; the transformer is installed on the whole machine PCB board by contacting and welding the pad of the transformer PCB with the pad of the power supply PCB. However, this solution requires opening a sinking hole on the whole machine PCB board for sinking the transformer core. Utility Model Content

[0006] To solve the above problems, the utility model proposes a transformer based on a planar PCB winding. By improving the installed pin structure, the overall production efficiency of the transformer is improved while reducing the pin assembly process. The boss structure is adopted to eliminate the structural setting of the PCB board opening and sinking the magnetic core, thereby improving the installation efficiency of the transformer.

[0007] According to some embodiments, the present invention provides a transformer based on a planar PCB winding, which adopts the following technical solutions:

[0008] A transformer based on a planar PCB winding includes a first magnetic core, a second magnetic core, and a PCB winding mounted on the first and second magnetic cores. Several solder pads are provided on the edge of the PCB winding extending from the first and second magnetic cores. The solder pads are positioned flush with an end of the first magnetic core away from the second magnetic core.

[0009] As a further technical limitation, an extension portion is provided on the PCB winding, and a plurality of the pads are provided at an end of the extension portion away from the PCB winding.

[0010] Furthermore, the two ends of the PCB winding and the two opposite surfaces of the two extensions constitute a tinning area, and a plurality of tinning positions are provided on the tinning area, and the tinning positions correspond to and are connected to the soldering pads one by one.

[0011] Furthermore, the tinning position is provided with a copper layer, and the copper layer is connected to the soldering pad.

[0012] Furthermore, at least one groove is provided on the tinning position, and a copper plating layer is provided in the groove.

[0013] Furthermore, the groove passes through the PCB winding, the extension portion and the pad in sequence.

[0014] Furthermore, a plurality of groups of tinning positions are arranged at intervals along the width direction of the PCB winding.

[0015] Furthermore, the groove wall of the groove is arranged in an arc shape.

[0016] As a further technical limitation, the first magnetic core and the second magnetic core have the same structural configuration, and a first center column and a second center column are respectively provided at the middle positions of the first magnetic core and the second magnetic core.

[0017] Furthermore, a winding through hole adapted to the first center column and the second center column is provided in the middle of the PCB winding.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model effectively solves the problem that the transformer is damaged due to the need to weld lead pins or drill sinking holes for the tail wires of the transformer PCB winding, improves the installed lead pin structure, reduces the lead pin assembly process, and improves the overall production efficiency of the transformer; the boss structure is adopted to eliminate the structural setting of the PCB board hole drilling and sinking the magnetic core, thereby improving the installation efficiency of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 This is a schematic structural diagram of a transformer based on a planar PCB winding in an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of an exploded structure of a transformer based on a planar PCB winding in an embodiment of the present utility model;

[0023] Figure 3This is a structural diagram of a PCB winding in an embodiment of the present utility model;

[0024] Figure 4 This is a structural diagram of a PCB winding in an embodiment of the present utility model;

[0025] Figure 5 This is a structural diagram of the first magnetic core in an embodiment of the present utility model;

[0026] Figure 6 This is a structural diagram of the second magnetic core in an embodiment of the present utility model;

[0027] Among them, 1. first magnetic core; 11. first center column; 2. PCB winding; 21. winding through hole; 3. second magnetic core; 31. second center column; 4. solder pad; 5. boss; 6. copper layer. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words determined for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention, and cannot be understood as a limitation on the present invention.

[0032] In this utility model, terms such as "fixed connection," "connected," and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meaning of these terms in this utility model based on specific circumstances, and they should not be construed as limiting this utility model.

[0033] Example

[0034] This embodiment introduces a transformer based on a planar PCB winding.

[0035] like Figure 1 and Figure 2 As shown, a transformer based on a planar PCB winding includes a first magnetic core 1, a PCB winding 2, and a second magnetic core 3. The PCB winding 2 is disposed between the first and second magnetic cores 1 and 3. Several solder pads 4 are provided along the edge of the PCB winding 2 extending beyond the first and second magnetic cores 1 and 3. These solder pads 4 are positioned flush with the end of the first magnetic core 1 that is distal to the second magnetic core 3. This embodiment eliminates the need for a PCB opening to lower the magnetic core, improving transformer installation efficiency.

[0036] Specifically, such as Figure 3 and Figure 4 As shown, an extension is provided at each end of the PCB winding, and the extension is located at the end of the PCB winding 2 facing the first magnetic core. Several solder pads are provided on the end of the extension facing away from the PCB winding 2, so that the height of the solder pads and the first magnetic core 1 are away from the second magnetic core 3.

[0037] Furthermore, the two ends of the PCB winding and the two surfaces opposite to each other of the two extensions constitute a tinning area, and the tinning area is provided with several groups of tinning positions. In this embodiment, the several groups of tinning positions are arranged in sequence along the width direction of the PCB winding 2, and the tinning positions correspond to and are connected to the soldering pads one by one.

[0038] The tinning area is provided with a copper layer that connects to the solder pad, facilitating tinning. In this embodiment, the copper layer is produced using a copper deposition process. To increase the contact area for tinning, the tinning area is provided with at least one groove, within which the copper layer is disposed. Each groove is arranged along the thickness of the PCB winding 2 and sequentially extends through the PCB winding 2, the extension, and the solder pad 4. Furthermore, the groove walls are curved to further increase the tinning area.

[0039] like Figure 5 and Figure 6 As shown, a first center column 11 is provided on the first magnetic core, and a second center column 31 is provided on the second magnetic core 3. Correspondingly, a winding through hole 21 is provided at the center of the PCB winding 2. During installation, the PCB winding is sleeved between the first magnetic core 1 and the second magnetic core 3. At this time, the first center column 11 and the second center column 31 are located in the winding through hole 21, thereby positioning the PCB winding 2 between the first magnetic core 1 and the second magnetic core 3. The PCB winding 2, the first magnetic core 1 and the second magnetic core 3 are fixed by wrapping insulating tape.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0041] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A transformer based on a planar PCB winding, characterized in that: It includes a first magnetic core, a second magnetic core, and a PCB winding sleeved on the first magnetic core and the second magnetic core; a plurality of solder pads are provided on the edge of the PCB winding extending from the first magnetic core and the second magnetic core, and the position of the solder pads is flush with the end of the first magnetic core away from the second magnetic core.

2. A transformer based on a planar PCB winding as claimed in claim 1, characterized in that: An extension portion is provided on the PCB winding, and a plurality of pads are provided on an end of the extension portion away from the PCB winding.

3. A transformer based on a planar PCB winding as claimed in claim 2, characterized in that: The two ends of the PCB winding and the two surfaces of the two extensions that are separated from each other constitute a tinning area. A plurality of tinning positions are provided on the tinning area. The tinning positions correspond to and are connected to the soldering pads one by one.

4. A transformer based on a planar PCB winding as claimed in claim 3, characterized in that: The tinning position is provided with a copper layer, and the copper layer is connected to the soldering pad.

5. A transformer based on a planar PCB winding as claimed in claim 4, characterized in that: At least one groove is provided on the tinning position, and a copper deposition layer is provided in the groove.

6. A transformer based on a planar PCB winding as claimed in claim 5, characterized in that: The groove sequentially passes through the PCB winding, the extension portion and the pad.

7. A transformer based on a planar PCB winding as claimed in claim 3, characterized in that: A plurality of groups of tinning positions are arranged at intervals along the width direction of the PCB winding.

8. A transformer based on a planar PCB winding as claimed in claim 5, characterized in that: The groove wall of the groove is arranged in an arc shape.

9. A transformer based on a planar PCB winding as claimed in claim 1, characterized in that: The first magnetic core and the second magnetic core have the same structural configuration, and a first center column and a second center column are respectively provided at the middle positions of the first magnetic core and the second magnetic core.

10. A transformer based on a planar PCB winding as claimed in claim 9, characterized in that: A winding through hole adapted to the first center column and the second center column is provided in the middle of the PCB winding.

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