Transformer and driving equipment

Abstract

The utility model discloses a transformer and drive equipment, said transformer includes circuit board and transformer body, be equipped with the accommodation space in the circuit board, the transformer body is fixed in the accommodation space and is electrically connected with the circuit board, and the bottom surface of transformer body is lower than the top surface of circuit board. According to the utility model, the transformer is embedded into the circuit board, so that the overall thickness of the transformer and the circuit board is reduced, and the transformer is suitable for thin electronic products.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a transformer and its driving device. Background Technology

[0002] The traditional method of using a transformer involves soldering it onto a circuit board and converting external power into the operating voltage required for the circuit board to function properly.

[0003] However, with the current demand for thinner and lighter electronic products, the available height above the circuit board is only 3mm to 5mm, further limiting the height available for the transformer. Therefore, how to reduce the combined thickness of the transformer and circuit board, and thus reduce the thickness of electronic products, making the transformer suitable for thin electronic devices, is a technical problem that existing transformers need to solve. Utility Model Content

[0004] The purpose of this invention is to provide a transformer and drive device suitable for use in thin electronic devices.

[0005] To achieve the above objectives, on the one hand, this utility model proposes a transformer, comprising:

[0006] A circuit board, wherein a receiving space is provided within the circuit board;

[0007] The transformer body is fixed within the accommodating space and electrically connected to the circuit board, with the bottom surface of the transformer body being lower than the top surface of the circuit board.

[0008] In a preferred embodiment, the circuit board is provided with a through-hole for forming the receiving space, and the transformer body is at least partially embedded and fixed in the through-hole.

[0009] In a preferred embodiment, the transformer body is further covered with a protective shell, and a plurality of pins connected to the circuit board are provided between the protective shell and the circuit board. The transformer body is electrically connected to the circuit board through the pins, and the thickness of the top of the protective shell is less than the thickness of the circuit board.

[0010] In a preferred embodiment, the protective housing and the transformer body are fixed together by an adhesive, which fills the gap between the protective housing and the transformer body.

[0011] In a preferred embodiment, the height between the top surface of the protective housing and the bottom surface of the circuit board is greater than 2 mm and less than or equal to 6 mm.

[0012] In a preferred embodiment, the circuit board is provided with a groove, which is recessed downward from the top surface of the circuit board, and the receiving space is formed within the groove.

[0013] In a preferred embodiment, the height between the top surface of the transformer body and the bottom surface of the circuit board is greater than 2mm and less than or equal to 6mm.

[0014] In a preferred embodiment, the transformer is a nanocrystalline core transformer, which includes a nanocrystalline core and a primary coil and a secondary coil wound on the nanocrystalline core. Both the primary coil and the secondary coil are electrically connected to the circuit board.

[0015] On the other hand, this utility model proposes a driving device, including the above-mentioned transformer, which is connected to a directional sound-generating device. The transformer receives a modulated audio signal after being modulated by ultrasound, and the modulated audio signal is adjusted by the transformer to match the parameters of the directional sound-generating device before being output to the directional sound-generating device.

[0016] In a preferred embodiment, the directional sound-generating device is an electrostatic ultrasonic transducer. The electrostatic ultrasonic transducer includes a vibrating layer, a first electrode layer, a microstructure, a second electrode layer, and a substrate layer. The first electrode layer is disposed on the side of the vibrating layer near the substrate layer, and the second electrode layer is disposed on the side of the substrate layer near the vibrating layer. The microstructure is disposed between the first electrode layer and the second electrode layer to provide the vibration space required for the vibration of the vibrating layer. The vibrating layer vibrates and generates sound under the action of the modulated audio signal output by the transformer.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model reduces the overall thickness of the transformer and the circuit board by embedding the transformer into the circuit board, thus making it suitable for use in thin electronic products (such as ultra-thin displays, laptops, etc.).

[0019] 2. This utility model also enhances the connection stability between the transformer and the circuit board by adding a protective shell and pin design, and also protects the transformer. In addition, this utility model fills the gap between the transformer and the circuit board with glue, which not only makes the connection between the transformer and the circuit board more stable, but also suppresses inductor howling and prevents the transformer from emitting noise. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a transformer disclosed in Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of a transformer disclosed in Embodiment 1 of this utility model;

[0022] Figure 3 This is an exploded structural diagram of a transformer as disclosed in Embodiment 1 of this utility model;

[0023] Figure 4 This is a three-dimensional structural schematic diagram of a transformer disclosed in Embodiment 2 of this utility model;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of a transformer disclosed in Embodiment 2 of this utility model;

[0025] Figure 6 This is an exploded structural diagram of a transformer as disclosed in Embodiment 2 of this utility model;

[0026] Figure 7 This is a three-dimensional structural schematic diagram of a transformer disclosed in Embodiment 3 of this utility model;

[0027] Figure 8 This is a schematic diagram of the cross-sectional structure of a transformer as disclosed in Embodiment 3 of this utility model;

[0028] Figure 9 This is a schematic diagram of the exploded structure of a transformer as disclosed in Embodiment 3 of this utility model;

[0029] Figure 10 This is a schematic diagram of the directional sound-generating device of this utility model.

[0030] The attached figures are labeled as follows:

[0031] 1. Circuit board; 2. Transformer body; 21. Nanocrystalline magnetic core; 22. Primary coil; 23. Secondary coil; 3. Mounting hole; 4. Protective shell; 41. Top wall; 42. Left wall; 43. Right wall; 5. Pin; 51. Fixing part; 52. Connecting part; 6. Groove; 7. Directional sound generation device; 71. Vibrating layer; 72. First electrode layer; 73. Microstructure; 74. Second electrode layer; 75. Substrate layer. Detailed Implementation

[0032] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0033] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprising" shall be understood to include the stated elements or components without excluding other elements or other components.

[0034] like Figures 1-9 As shown, the present invention discloses a transformer, including a circuit board 1 and a transformer body 2, wherein the transformer body 2 is at least partially embedded in the circuit board 1 to reduce the overall thickness of the transformer body 2 and the circuit board 1, so that it can be used in thin electronic devices.

[0035] In one specific embodiment 1, the transformer further includes a mounting hole 3 and a protective housing 4. The mounting hole 3 is disposed on the circuit board 1 and penetrates the circuit board 1. A receiving space is formed within the mounting hole 3 for accommodating the transformer body 2, and the transformer body 2 is at least partially accommodated within the mounting hole 3. The protective housing 4 covers the transformer body 2.

[0036] In this embodiment, the protective shell 4 specifically includes a top wall 41 and a left wall 42 and a right wall 43 formed by bending downwards from the left and right sides of the top wall 41, respectively. The lower ends of the left wall 42 and the right wall 43 are embedded in the mounting holes 3, and their outer walls are in contact with the inner walls of the corresponding side circuit boards 1. The protective shell 4 is connected to the circuit board 1 via pins 5. Specifically, the left wall 42 and the right wall 43 of the protective shell 4 are connected to the circuit board 1 via pins 5. In this embodiment, the front and rear ends of the left wall 42 and the front and rear ends of the right wall 43 are each connected to the circuit board 1 via a pin 5, meaning that each of the four corners of the protective shell 4 is connected to the circuit board 1 via a pin 5. Specifically, pin 5 includes a fixing part 51 and a connecting part 52. The fixing part 51 extends outward from the inner side of the protective housing sidewall to the outer side of the sidewall, and the protruding part overlaps with the top surface of the circuit board 1. The connecting part 52 is formed by bending the other end of the fixing part 51 opposite to the protruding part, and is used to connect the coil of the transformer body 2 (specifically, the two can be soldered together). That is, the electrical connection between the coil of the transformer body 2 and the circuit board 1 is realized through pin 5. Of course, the pin 5 of this utility model is not limited to that described in embodiment 1. Other pin structures that can realize the electrical connection between the coil of the transformer body 2 and the circuit board 1 are also applicable to this utility model.

[0037] Preferably, in order to prevent the transformer body 2 from being unstable in the mounting hole 3, the gap between the transformer body 2 and the protective shell 4 is filled with an adhesive (such as by potting, not shown in the figure) to make the connection between the transformer body 2 and the protective shell 4 stable. In addition, it can also suppress inductor howling and prevent the transformer from emitting noise.

[0038] Furthermore, in this embodiment, even though a protective shell 4 is provided over the transformer body 2, the thickness of the top wall 41 of the protective shell 4 is less than the thickness of the circuit board 1, and the lower end of the transformer body 2 is embedded in the mounting hole 3. Therefore, the overall height between the top surface of the protective shell 4 and the bottom surface of the circuit board 1 is still less than the sum of the thickness of the transformer body 2 and the thickness of the circuit board 1. In this embodiment, the height between the top surface of the protective shell 4 and the bottom surface of the circuit board 1 is greater than 2mm and less than or equal to 6mm, which is suitable for thin electronic devices (such as ultra-thin displays, laptops, etc.) with a thickness between 2mm and 6mm, preferably greater than 2mm and less than or equal to 3mm.

[0039] In this embodiment, the transformer body 2 is preferably implemented using a nanocrystalline magnetic core transformer, specifically comprising a nanocrystalline magnetic core 21 and a primary coil 22 and a secondary coil 23 wound on the nanocrystalline magnetic core 21, both of which are electrically connected to the circuit board 1. Compared to ferrite core transformers, nanocrystalline magnetic core transformers have a higher saturation magnetic flux density, resulting in a larger saturation current. For example, for the same 300uH secondary inductance, the saturation current of a nanocrystalline magnetic core transformer is twice that of a ferrite core transformer. Therefore, a nanocrystalline magnetic core transformer carrying the same current will be half the size of a ferrite core transformer, making it more suitable for thinner and lighter electronic products.

[0040] In another alternative embodiment 2, unlike embodiment 1, the protective housing 4 is placed upside down inside the mounting hole 3, with the bottom surface of the protective housing 4 flush with or slightly higher than the bottom surface of the circuit board. The protective housing 4 and the mounting hole 3 form a receiving space, within which the transformer body 2 is placed. Other structures are the same as in the above embodiment, that is, in this embodiment, the transformer body 2 is also electrically connected to the circuit board 1 via pins 5, and preferably, a glue (not shown) is filled between the transformer body 2 and the protective housing 4, so that the lower end of the transformer body 2 is firmly attached to the protective housing 4.

[0041] Furthermore, in this embodiment 2, the overall height between the top surface of the transformer body 2 and the bottom surface of the circuit board 1 is still less than the sum of the thickness of the transformer body 2 and the thickness of the circuit board 1. In this embodiment, the height between the top surface of the transformer body 2 and the bottom surface of the circuit board 1 is greater than 2mm and less than or equal to 6mm, meaning it is also applicable to thin electronic devices with a thickness between 2mm and 6mm, preferably greater than 2mm and less than or equal to 3mm.

[0042] In another alternative embodiment 3, a groove 6 is provided on the circuit board 1, recessed downwards from the top surface of the circuit board 1. The groove 6 forms a receiving space for the transformer body 2, and the lower end of the transformer body 2 is embedded in the groove 6. The transformer body 2 and the circuit board 1 are also electrically connected via pins 5. In this embodiment, a glue (not shown) is preferably filled between the transformer body 2 and the groove 6 to ensure a stable fit between the lower end of the transformer body 2 and the groove 6. Of course, other solutions that enable at least partial embedding of the transformer body 2 into the circuit board 1 are also applicable to this invention.

[0043] Furthermore, in this embodiment, the overall height between the top surface of the transformer body 2 and the bottom surface of the circuit board 1 is still less than the sum of the thickness of the transformer body 2 and the thickness of the circuit board 1. Also, in this embodiment, the height between the top surface of the transformer body 2 and the bottom surface of the circuit board 1 is greater than 2mm and less than or equal to 6mm, meaning it is also suitable for thin electronic devices with a thickness between 2mm and 6mm, preferably greater than 2mm and less than or equal to 3mm.

[0044] This utility model also discloses a driving device, including the above-mentioned transformer, which is connected to a directional sound-generating device 7. The transformer is input with a modulated audio signal after being modulated by ultrasound. The modulated audio signal is adjusted by the transformer to match the parameters of the directional sound-generating device 7 and then output to the directional sound-generating device 7.

[0045] In implementation, the directional sound-emitting device 7 preferably uses an electrostatic ultrasonic transducer, specifically a fully transparent directional sound-emitting box, such as... Figure 10 As shown, its structure specifically includes a vibrating layer 71, a first electrode layer 72, a microstructure 73, a second electrode layer 74, and a substrate layer 75. In practice, the vibrating layer 71 can be made of transparent PET, CPI, or UTG. The first electrode layer 72 is disposed on the side of the vibrating layer 71 near the substrate layer 75, and in practice, it can be made of conductive materials such as ITO or nano-silver. The second electrode layer 74 is disposed on the side of the substrate layer 75 near the vibrating layer 71, and like the first electrode layer 72, its material can be conductive materials such as ITO or nano-silver. The microstructure 73 is disposed between the first electrode layer 72 and the second electrode layer 74 to provide the vibration space required for the vibration of the vibrating layer 71. In practice, the microstructure 73 can be a raised insulating dot structure in the shape of a circle, ellipse, or triangle. The substrate layer 75 is attached to the vibrating layer 71. In practice, the substrate layer 75 is preferably made of transparent glass, but it can also be made of other materials such as PET or CPI. The vibrating layer 71 vibrates and produces sound under the action of the modulated audio signal output by the transformer 1, and emits the original audio signal in a directional manner.

[0046] The advantages of this invention are as follows: 1. By embedding the transformer into the circuit board, the overall thickness of the transformer and the circuit board is reduced, making it suitable for use in thin electronic products (such as ultra-thin displays, laptops, etc.). 2. By adding a protective shell and pin design, this invention enhances the connection stability between the transformer and the circuit board and also protects the transformer. Furthermore, by filling the gap between the transformer and the circuit board with adhesive, this invention not only ensures a stable connection between the transformer and the circuit board but also suppresses inductor whistling and prevents the transformer from emitting noise.

[0047] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A transformer, characterized in that, include: A circuit board, wherein a receiving space is provided within the circuit board; The transformer body is fixed within the accommodating space and electrically connected to the circuit board, with the bottom surface of the transformer body being lower than the top surface of the circuit board.

2. A transformer as described in claim 1, characterized in that, The circuit board is provided with mounting holes that penetrate the circuit board to form the receiving space, and the transformer body is at least partially embedded and fixed in the mounting holes.

3. A transformer as described in claim 2, characterized in that, The transformer body is also covered by a protective shell. Several pins connected to the circuit board are provided between the protective shell and the circuit board. The transformer body is electrically connected to the circuit board through the pins, and the thickness of the top of the protective shell is less than the thickness of the circuit board.

4. A transformer as described in claim 3, characterized in that, The protective shell and the transformer body are fixed together by an adhesive, which fills the gap between the protective shell and the transformer body.

5. A transformer as described in claim 3, characterized in that, The height between the top surface of the protective shell and the bottom surface of the circuit board is greater than 2mm and less than or equal to 6mm.

6. A transformer as described in claim 1, characterized in that, The circuit board has a groove, which is recessed downward from the top surface of the circuit board, and the groove forms the receiving space.

7. A transformer as described in claim 6, characterized in that, The height between the top surface of the transformer body and the bottom surface of the circuit board is greater than 2mm and less than or equal to 6mm.

8. A transformer as described in any one of claims 1 to 7, characterized in that, The transformer is a nanocrystalline magnetic core transformer, which includes a nanocrystalline magnetic core and a primary coil and a secondary coil wound on the nanocrystalline magnetic core. Both the primary coil and the secondary coil are electrically connected to the circuit board.

9. A driving device, characterized in that, The driving device includes a transformer as described in any one of claims 1 to 8. The transformer is connected to the directional sound-generating device. The transformer receives a modulated audio signal after being modulated by ultrasound. The modulated audio signal is adjusted by the transformer to match the parameters of the directional sound-generating device and then output to the directional sound-generating device.

10. A driving device as described in claim 9, characterized in that, The directional sound-generating device is an electrostatic ultrasonic transducer, which includes a vibrating layer, a first electrode layer, a microstructure, a second electrode layer, and a substrate layer. The first electrode layer is disposed on the side of the vibrating layer close to the substrate layer, and the second electrode layer is disposed on the side of the substrate layer close to the vibrating layer. The microstructure is disposed between the first electrode layer and the second electrode layer to provide the vibration space required for the vibration of the vibrating layer. The vibrating layer vibrates and generates sound under the action of the modulated audio signal output by the transformer.

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