A transformer mounting structure through-embedded in a PCB board
By using a transformer mounting structure that penetrates and embeds into the PCB board, the problems of solder joint fatigue fracture and insufficient space utilization when mounting toroidal transformers on the PCB board are solved, achieving efficient space utilization and improved PCB board integration, and is suitable for a variety of electronic devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING XINGSHI TECH CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-06-12
AI Technical Summary
In the existing technology, the mounting method of toroidal transformers on PCB boards has problems such as solder joint fatigue fracture and insufficient space utilization. In particular, solder joint fatigue fracture is prone to occur in vibration environment. Furthermore, horizontal mounting occupies a large area, while side mounting has a high height, which cannot meet the needs of limited space.
A transformer mounting structure that penetrates and is embedded in a PCB board is provided. The structure involves inserting a protective housing into a mounting window, fixing it with a housing positioning block, connecting the pins to the PCB board pads, and placing the transformer body inside the protective housing cavity. This reduces the space occupied above and utilizes the space below. The protective housing is made of plastic to improve stability.
It effectively reduces the space occupied on the upper surface of the PCB board, reducing the area occupied by 50%, improving the strength and integration of the PCB board, and expanding the market application range of the product to portable electronic devices, high-density industrial control modules, micro smart home devices, etc.
Smart Images
Figure CN224355074U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer installation technology, and in particular to a transformer installation structure that penetrates and is embedded in a PCB board. Background Technology
[0002] Toroidal transformers (such as high-frequency power transformers and pulse transformers) are widely used in electronic equipment for voltage conversion and signal isolation.
[0003] Common transformer mounting methods include surface mount technology (SMT): the toroidal transformer is soldered onto surface mount pads on the PCB board via reflow soldering, which is suitable for miniaturized transformers. However, surface mount toroidal transformers are prone to solder joint fatigue fracture in vibrating environments.
[0004] To avoid solder joint fatigue fracture, through-hole mounting (THT) can also be used: the pins are inserted into through holes of through-hole pads on the PCB board by wave soldering. There are usually two types of mounting: side-mounted and horizontal-mounted. In side-mounted toroidal transformers, the central axis is parallel to the surface of the PCB board, while in horizontal-mounted toroidal transformers, the central axis is perpendicular to the surface of the PCB board.
[0005] To achieve functional centralization, existing PCBs often integrate multiple electrical modules, but horizontal mounting occupies a large area on the PCB. While side-mounted transformers occupy less area, they result in a higher top surface height on the PCB. This makes traditional side-mounting unsuitable for situations where there is limited space at the top of the PCB, but usable space at the bottom.
[0006] Therefore, there is an urgent need in the field for a transformer mounting structure that penetrates and is embedded in a PCB board to solve the above problems. Utility Model Content
[0007] The purpose of this utility model is to provide a transformer mounting structure that penetrates and is embedded in a PCB board, so as to solve the problems existing in the prior art. It can reduce the space occupied by the transformer body on the upper part of the PCB board and make full use of the space below the PCB board.
[0008] To achieve the above objectives, this utility model provides the following solution:
[0009] This utility model discloses a transformer mounting structure that penetrates and is embedded in a PCB board, including a protective shell and a PCB board. The PCB board has a mounting window, and the protective shell can be inserted into the mounting window. The protective shell has a transformer body cavity and multiple pins. The transformer body cavity is used to place the transformer body. One end of the pin is connected to the wiring of the transformer body, and the other end of the pin is connected to the pad on the PCB board.
[0010] Preferably, the outer wall of the protective housing is provided with a housing positioning block, and when the protective housing is inserted into the mounting window, the housing positioning block abuts against the upper surface of the PCB board.
[0011] Preferably, the pin is mounted on the housing positioning block.
[0012] Preferably, the plurality of pins are symmetrically distributed on both sides of the housing positioning block, and each side of the housing positioning block is provided with three pins.
[0013] Preferably, the opening of the transformer body cavity is provided with several wiring slots, through which the wiring of the transformer body can pass.
[0014] Preferably, the main body of the transformer is a toroidal transformer.
[0015] Preferably, the mounting window is rectangular in shape.
[0016] Preferably, the pin has a hook structure.
[0017] Preferably, the pads on the PCB are through-hole pads.
[0018] Preferably, the protective shell is made of plastic.
[0019] The present invention achieves the following technical advantages over the prior art:
[0020] This invention effectively reduces the space occupied on the upper surface of the PCB board by installing the protective shell onto the mounting window. The overall height of the PCB board is reduced by approximately 55%, and the area occupied by the transformer body on the PCB board is reduced by about 50% compared to horizontal mounting. Due to the smaller mounting window area, the PCB board's strength is increased, effectively meeting the design requirements of height-constrained and miniaturized products. The reduced PCB board space can be used to accommodate more electronic components, increasing the PCB board's integration and facilitating product diversification and performance enhancement. For example, in miniaturized electronic devices, necessary sensors and communication modules can be added. Simultaneously, part of the protective shell extends below the PCB board, fully utilizing the space beneath. Having solved the height and area limitations, PCB components can be widely used in more space-constrained fields, such as portable electronic devices (smartphones, tablets, smartwatches), high-density industrial control modules, miniature smart home devices, and aerospace electronic equipment, greatly expanding the product's market application scope. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the transformer mounting structure that penetrates and is embedded in the PCB board according to an embodiment of the present invention;
[0023] In the diagram: 1-protective housing; 2-housing positioning block; 3-transformer main body cavity; 4-PCB board; 5-pin; 6-wiring card slot. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] The purpose of this utility model is to provide a transformer mounting structure that penetrates and is embedded in a PCB board, so as to solve the problems existing in the prior art. It can reduce the space occupied by the transformer body on the upper part of the PCB board and make full use of the space below the PCB board.
[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] like Figure 1 As shown, this embodiment provides a transformer mounting structure that penetrates and embeds into a PCB board, including a protective housing 1 and a PCB board 4. The PCB board 4 can be an existing circuit board. The PCB board 4 has a mounting window whose shape matches the cross-sectional shape of the protective housing 1, allowing the protective housing 1 to be inserted into the mounting window. The protective housing 1 has a transformer body cavity 3 and multiple pins 5. The internal dimensions of the transformer body cavity 3 are larger than the dimensions of the transformer body, allowing the transformer body to be placed inside the cavity. One end of each pin 5 is connected to the wiring of the transformer body, which includes the input and output lines. The other end of each pin 5 is connected to a pad on the PCB board 4, thereby achieving an electrical connection between the transformer body and the PCB board 4.
[0028] When a portion of the protective housing 1 is inserted into the mounting window, the height of the portion of the protective housing 1 above the PCB board 4 is significantly reduced, making it suitable for applications where space above the PCB board 4 is limited. The portion of the protective housing 1 below the PCB board 4 fully utilizes the space below the PCB board 4, minimizing wasted space. The transformer body is placed within the transformer body cavity 3, and the protective housing 1 provides protection for the transformer body.
[0029] In this embodiment, a housing positioning block 2 is provided on the outer wall of the protective housing 1. As shown in the figure, the housing positioning block 2 is a rectangular ring structure, which is fixed to the outer wall of the protective housing 1. The housing positioning block 2 and the protective housing 1 are integrally manufactured, that is, the housing positioning block 2 can be regarded as part of the protective housing 1. When the protective housing 1 is inserted into the mounting window, the lower end of the housing positioning block 2 abuts against the upper surface of the PCB board 4, thereby realizing the positioning and fixation of the protective housing 1.
[0030] In this embodiment, the protective housing 1 is relatively small, with limited space for mounting the pins 5. The housing positioning block 2 provides the space for mounting the pins 5, allowing them to be installed on the housing positioning block 2. Specifically, the housing positioning block has multiple mounting holes, the number of which corresponds one-to-one with the number of pins 5. Each pin 5 is inserted into its corresponding mounting hole, thus securing the pin 5.
[0031] In this embodiment, as Figure 1As shown, multiple pins 5 are symmetrically distributed on both sides of the housing positioning block 2, with three pins 5 on each side of the housing positioning block 2, for a total of six pins 5. Each of the six pins 5 corresponds one-to-one with a specific wiring connection of the transformer body. It should be noted that the wiring of the transformer body includes input lines and output lines. In this embodiment, it can be understood that the total number of input and output lines of the transformer body is six, which may include three input lines and three output lines. The three input lines and three output lines are located on both sides of the transformer body and are respectively connected to the pins 5 on both sides.
[0032] Of course, different transformer bodies will have different numbers of wires. In order to match the transformer body, the number of pins 5 on the housing positioning block 2 and the setting position of pins 5 can be adjusted according to actual needs, and are not limited to this one.
[0033] In this embodiment, a number of wiring slots 6 are provided at the upper opening of the transformer body cavity 3. The wiring of the transformer body can pass through the wiring slots 6 and be secured. The wiring slots 6 can limit the position of each wiring to prevent the wiring from shaking during actual use, which could lead to the breakage of the solder joint between the wiring and the pin 5.
[0034] In this embodiment, the transformer body includes, but is not limited to, the existing toroidal transformer. Other types of transformers can also be selected according to actual needs, thereby increasing the overall applicability of the equipment.
[0035] In this embodiment, the mounting window is rectangular. Correspondingly, the cross-sectional shape of the protective housing 1 is also rectangular, and the cross-sectional area of the protective housing 1 is smaller than that of the mounting window, thus facilitating the installation of the protective housing 1. At the same time, the cross-sectional area of the mounting window is smaller than that of the housing positioning block 2, thereby preventing the housing positioning block 2 from passing through the mounting window, allowing the housing positioning block 2 to be supported on the upper surface of the PCB board 4.
[0036] In this embodiment, as Figure 1 As shown, pin 5 has a hook structure, or a figure-7 shape. The wiring of the transformer body is connected to the upper end of pin 5, and the lower end of pin 5 is connected to the corresponding pad on PCB board 4.
[0037] In this embodiment, the pads on the PCB board 4 are existing through-hole pads. The lower end of the pin 5 is inserted into the pad hole of the through-hole pad before soldering, thereby ensuring the stability of the protective housing 1 and the pin 5.
[0038] In this embodiment, the protective shell 1 is made of plastic, which is inexpensive, lightweight, and has good insulation properties. Of course, those skilled in the art can replace it with other materials according to actual needs, and are not limited to this one.
[0039] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0041] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).
[0042] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this utility model to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.
[0043] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.
[0044] It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0045] It should also be noted that in the embodiments of this application, the same reference numerals are used to denote the same component or the same part.
[0046] Any adaptive changes made according to actual needs are within the protection scope of this utility model.
[0047] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A transformer mounting structure that penetrates and is embedded in a PCB board, characterized in that: The device includes a protective housing (1) and a PCB board (4). The PCB board (4) has an installation window, and the protective housing (1) can be inserted into the installation window. The protective housing (1) has a transformer body cavity (3) and multiple pins (5). The transformer body cavity (3) is used to place the transformer body. One end of the pin (5) is connected to the wiring of the transformer body, and the other end of the pin (5) is connected to the pad on the PCB board (4).
2. The transformer mounting structure that penetrates and embeds into a PCB board according to claim 1, characterized in that: The outer wall of the protective housing (1) is provided with a housing positioning block (2). When the protective housing (1) is inserted into the installation window, the housing positioning block (2) abuts against the upper surface of the PCB board (4).
3. The transformer mounting structure that penetrates and embeds into the PCB board according to claim 2, characterized in that: The pin (5) is mounted on the housing positioning block (2).
4. The transformer mounting structure that penetrates and embeds into the PCB board according to claim 3, characterized in that: Multiple pins (5) are symmetrically distributed on both sides of the housing positioning block (2), and each side of the housing positioning block (2) is provided with three pins (5).
5. The transformer mounting structure that penetrates and embeds into a PCB board according to claim 1, characterized in that: The transformer body cavity (3) has several wiring slots (6) at its opening, through which the wiring of the transformer body can pass.
6. The transformer mounting structure that penetrates and embeds into a PCB board according to claim 1, characterized in that: The main body of the transformer is a toroidal transformer.
7. The transformer mounting structure that penetrates and embeds into a PCB board according to claim 1, characterized in that: The installation window is rectangular in shape.
8. The transformer mounting structure that penetrates and embeds into a PCB board according to claim 1, characterized in that: The pin (5) has a hook structure.
9. The transformer mounting structure that penetrates and embeds into a PCB board according to claim 1, characterized in that: The pads on the PCB board (4) are through-hole pads.
10. The transformer mounting structure that penetrates and embeds into a PCB board according to claim 1, characterized in that: The protective shell (1) is made of plastic.