Low-power pulse transformer and charger

Abstract

The utility model relates to the technical field of electronic components, in particular to a low-power pulse transformer and a charger, the transformer comprises a magnetic core assembly and a bowl-shaped plastic shell, the magnetic core assembly is fixedly installed inside the plastic shell, and metal pins are fixedly installed on the horizontal outer side of the face, provided with an opening, of the plastic shell; the magnetic core assembly comprises a circular-ring-shaped framework, a coil with a lead, a first magnetic core and a second magnetic core, the center of one face of the first magnetic core and the center of one face of the second magnetic core are provided with cylindrical protruding parts matched with an inner ring of the framework in size, the coil is wound on the outer ring surface of the framework, and the framework is arranged between the first magnetic core and the second magnetic core. The protruding part of the first magnetic core and the protruding part of the second magnetic core are both located in the inner ring of the framework, the mutual contact faces of the protruding part of the first magnetic core and the protruding part of the second magnetic core are connected through an adhesive, and leads of the coil are welded to the corresponding metal pins. The transformer is high in installation efficiency, high in reliability and small in occupied space of a circuit board.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a low-power pulse transformer and a charger. Background Art

[0002] In the field of electronic component technology, especially in high-performance radar communication systems, low-power pulse transformers play a vital role. This type of transformer is not only a bridge for signal transmission, ensuring that high-frequency, low-power pulse signals are transmitted efficiently and accurately within the system, but also a key factor affecting the stability and reliability of the entire system. The traditional tank-type low-power pulse transformer design mostly adopts the method of directly winding the enameled wire on the skeleton by hand or machine, and then assembling the magnetic core assembly. Although this type of design has historically met the basic electrical performance requirements, its limitations are becoming increasingly prominent with the urgent demand for miniaturization, integration, and high efficiency of modern radar communication equipment.

[0003] Specifically, several key issues in traditional designs limit the overall performance and manufacturing efficiency of the system. First, the direct lead-out method of the transformer leads requires that each pin be identified and correctly connected one by one during installation, which is not only time-consuming and labor-intensive, but also very easy to cause connection errors due to human errors, affecting system performance. Secondly, the exposed leads are susceptible to physical damage or electromagnetic interference during production and transportation, and are difficult to repair after damage, which increases maintenance costs and reduces the overall reliability and service life of the product. Furthermore, in order to accommodate these lead soldering, the circuit board design must include additional space and pads, which is a volume waste that cannot be ignored in modern electronic devices that pursue extreme miniaturization.

[0004] Therefore, how to optimize the structural design of the transformer, simplify the installation process, and improve integration and reliability while ensuring electrical performance has become a major challenge in the current development of electronic component technology. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a low-power pulse transformer and a charger, which solve the technical problems of low installation efficiency, insufficient reliability and excessive occupation of circuit board space in the existing tank-type low-power pulse transformer.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0009] In a first aspect, an embodiment of the utility model provides a low-power pulse transformer, comprising:

[0010] The magnetic core assembly and the bowl-shaped plastic housing;

[0011] The magnetic core assembly is fixedly installed inside the plastic shell, and a metal pin is fixedly installed on the horizontal outer side of the plastic shell with an open side;

[0012] The magnetic core assembly comprises: a toroidal skeleton, a wire package with lead wires, a first magnetic core and a second magnetic core having a cylindrical protrusion matching the size of an inner ring of the skeleton at the center of one side;

[0013] The wire package is wound on the outer ring surface of the skeleton, the skeleton is placed between the first magnetic core and the second magnetic core, the protrusion of the first magnetic core and the protrusion of the second magnetic core are both located in the inner ring of the skeleton, and the mutual contact surfaces of the protrusion of the first magnetic core and the protrusion of the second magnetic core are connected by an adhesive, and the leads of the wire package are welded to the corresponding metal pins.

[0014] Optionally, a first baffle and a second baffle are respectively provided at two ends of the frame having an opening;

[0015] The first baffle and the second baffle are perpendicular to the outer ring surface of the skeleton;

[0016] An insulating pad is arranged between the first baffle and the bottom surface of the first magnetic core, and an insulating pad is arranged between the second baffle and the bottom surface of the second magnetic core.

[0017] Optionally, two notches are respectively formed on the edge positions of the first baffle plate and the second baffle plate, and the position of the notch on the first baffle plate corresponds to the position of the notch on the second baffle plate in the direction of the inner center line of the inner ring of the skeleton.

[0018] Optionally, two notches are provided on the bottom surface of the first magnetic core at the same positions as the notches on the first baffle;

[0019] Two notches are provided on the bottom surface of the second magnetic core at the same positions as the notches on the second baffle.

[0020] Optionally, a first protection plate and a second protection plate are provided on the same side of the first magnetic core having the protrusion.

[0021] The first protection plate and the second protection plate are located at the bottom edge of the first magnetic core, and the first protection plate and the second protection plate are perpendicular to the bottom surface of the first magnetic core;

[0022] A third protection plate and a fourth protection plate are arranged on the same side of the second magnetic core having the protrusion,

[0023] The third protection plate and the fourth protection plate are located at the bottom edge of the second magnetic core, and the third protection plate and the fourth protection plate are perpendicular to the bottom surface of the second magnetic core.

[0024] Optionally, the first protection plate and the second protection plate are respectively arranged on both sides of two notches on the bottom surface of the first magnetic core;

[0025] The third protection plate and the fourth protection plate are respectively arranged on both sides of the two notches on the bottom surface of the second magnetic core.

[0026] Optionally, both ends of the two notches on the first protection plate and the second protection plate close to the bottom surface of the first magnetic core are smooth arc planes;

[0027] Both ends of the two notches on the third protection plate and the fourth protection plate close to the bottom surface of the second magnetic core are smooth arc planes.

[0028] Optionally, a hole is provided in the middle of the protrusion of the first magnetic core, which passes through the entire protrusion and the bottom surface of the first magnetic core;

[0029] A hole penetrating the entire protrusion and the bottom surface of the second magnetic core is provided in the middle of the protrusion of the second magnetic core.

[0030] Optionally, a recessed structure corresponding to the shape of the outer edge of the magnetic core assembly is provided inside the shell.

[0031] In a second aspect, an embodiment of the utility model provides a charger, comprising the low-power pulse transformer described in the first aspect above, wherein the low-power pulse transformer is embedded in a PCB board inside the charger.

[0032] (III) Beneficial effects

[0033] The low-power pulse transformer of the utility model adopts a bowl-shaped plastic shell with integrated metal pins, an optimized magnetic core component structure and enhanced protection measures, which significantly improves the installation efficiency and transformer reliability compared with the prior art. Specifically:

[0034] Simplify installation and improve reliability: By fixing the metal pins directly on the outside of the plastic shell, the lead connection process is simplified, the manual welding steps are reduced, human wiring errors are avoided, and the assembly efficiency and the consistency of the finished product are improved. The internal structural design of the core assembly and the adhesive connection enhance the stability and insulation between the cores, further improving the overall electrical performance and long-term reliability.

[0035] Saving space and improving integration: The design of the core component and the bowl-shaped shell is compact, especially by setting a recessed structure inside the shell that corresponds to the edge shape of the core component, which maximizes the use of the internal space and reduces the need for additional pads and space on the circuit board. At the same time, it can also increase the stability of component connections, which is especially important for modern electronic devices that pursue miniaturization and high integration, such as high-performance chargers.

[0036] Enhanced protection and durability: The added baffles, insulating pads and protective plates not only provide physical protection for the core and wire package to prevent accidental damage during transportation and use, but also reduce the friction of the lead contact surface through the smooth arc design, thereby extending the service life of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A bottom view of a low-power pulse transformer provided in one embodiment of the utility model;

[0038] Figure 2 A front view of a low-power pulse transformer provided by an embodiment of the utility model;

[0039] Figure 3 A top view of a low-power pulse transformer provided in one embodiment of the utility model;

[0040] Figure 4 A schematic structural diagram of a magnetic core assembly provided in one embodiment of the utility model;

[0041] Figure 5 A schematic diagram of the structure of a housing provided in one embodiment of the utility model;

[0042] Figure 6 A schematic diagram of the structure of a skeleton provided in one embodiment of the utility model;

[0043] Figure 7 A schematic structural diagram of a magnetic core provided in one embodiment of the utility model.

[0044] [Description of Reference Numerals]

[0045] 1: core assembly, 2: housing, 3: pins;

[0046] 11: skeleton, 12: first magnetic core, 13: second magnetic core, 14: first baffle, 15: second baffle, 16: first protective plate; 17: second protective plate. DETAILED DESCRIPTION

[0047] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0048] Embodiment 1

[0049] like Figure 1-Figure 3 , Figure 5 As shown, this embodiment provides a low-power pulse transformer, which may include: a magnetic core component 1 and a bowl-shaped plastic housing 2;

[0050] The magnetic core assembly 1 is fixedly mounted inside the plastic housing 2 , and a metal pin 3 is fixedly mounted on the horizontal outer side of the plastic housing 2 having an open side.

[0051] In this embodiment, four metal pins 3 and two metal pins 3 are respectively installed on the left and right sides of the plastic housing 2. Optionally, the metal pins 3 are copper tin-plated pins.

[0052] like Figure 4 , Figure 6 and Figure 7 As shown, the magnetic core assembly 1 comprises: a toroidal skeleton 11, a wire package with lead wires, a first magnetic core 12 and a second magnetic core 13 having a cylindrical protrusion matching the size of the inner ring of the skeleton at the center of one side;

[0053] The wire package is wound on the outer ring surface of the skeleton 11, and the skeleton 11 is placed between the first magnetic core 12 and the second magnetic core 13. The protrusion of the first magnetic core 12 and the protrusion of the second magnetic core 13 are both located in the inner ring of the skeleton 11, and the mutual contact surfaces of the protrusion of the first magnetic core 12 and the protrusion of the second magnetic core 13 are connected by an adhesive, and the leads of the wire package are welded to the corresponding metal pins 3.

[0054] In this embodiment, a first baffle 14 and a second baffle 15 are respectively provided at both ends of the frame 11 having an opening;

[0055] The first baffle 14 and the second baffle 15 are perpendicular to the outer ring surface of the frame 11;

[0056] An insulating pad is provided between the first baffle 14 and the bottom surface of the first magnetic core 12 , and an insulating pad is provided between the second baffle 15 and the bottom surface of the second magnetic core 13 .

[0057] Two notches are respectively formed on the edges of the first baffle plate 14 and the second baffle plate 15 , and the notches on the first baffle plate 14 and the notches on the second baffle plate 15 correspond to each other in the direction of the inner center line of the inner ring of the frame 11 .

[0058] Two notches are provided on the bottom surface of the first magnetic core 12 at the same positions as the notches on the first baffle 14;

[0059] Two notches are formed on the bottom surface of the second magnetic core 13 , which are located at the same positions as the notches on the second baffle 15 .

[0060] A first protection plate 16 and a second protection plate 17 are provided on the same side of the first magnetic core 12 having the protrusion.

[0061] The first protection plate 16 and the second protection plate 17 are located at the bottom edge of the first magnetic core 12, and the first protection plate 16 and the second protection plate 17 are perpendicular to the bottom surface of the first magnetic core 12;

[0062] A third protection plate and a fourth protection plate are provided on the same side of the second magnetic core 13 having the protrusion.

[0063] The third protection plate and the fourth protection plate are located at the bottom edge of the second magnetic core 13 , and the third protection plate and the fourth protection plate are perpendicular to the bottom surface of the second magnetic core 13 .

[0064] Optionally, the first protective plate 16 is connected to the third protective plate by an adhesive, and the second protective plate 17 is connected to the fourth protective plate by an adhesive; or, the first protective plate 16 is connected to the fourth protective plate by an adhesive, and the second protective plate 17 is connected to the third protective plate by an adhesive.

[0065] The first protection plate 16 and the second protection plate 17 are respectively disposed on both sides of two notches on the bottom surface of the first magnetic core 12;

[0066] The third protection plate and the fourth protection plate are respectively disposed on two sides of two notches on the bottom surface of the second magnetic core 13 .

[0067] More preferably, both ends of the two notches on the first protective plate 16 and the second protective plate 17 near the bottom surface of the first magnetic core 12 are smooth arc planes; both ends of the two notches on the third protective plate and the fourth protective plate near the bottom surface of the second magnetic core 13 are smooth arc planes; so as to reduce the friction of the lead contact surface.

[0068] A hole penetrating the entire protrusion and the bottom surface of the first magnetic core 12 is opened in the middle of the protrusion of the first magnetic core 12; a hole penetrating the entire protrusion and the bottom surface of the second magnetic core 13 is opened in the middle of the protrusion of the second magnetic core 13, which is beneficial to the heat dissipation of the transformer during operation and prolongs its life.

[0069] A recessed structure corresponding to the outer edge shape of the magnetic core assembly 1 is provided inside the housing 2, which maximizes the use of the internal space, reduces the need for additional pads and space on the circuit board, and increases the stability of component connection.

[0070] Embodiment 2

[0071] This embodiment provides a charger, including the low-power pulse transformer described in the above-mentioned embodiment 1. The low-power pulse transformer is embedded in a PCB board inside the charger, one end of which is connected to a power management chip or a dedicated control circuit, and the other end is connected to an output port, and is used to adjust the output current and voltage through appropriate circuit design to adapt to different charging protocols.

[0072] Embodiment 3

[0073] This embodiment provides a switching power supply, including the low-power pulse transformer described in the above embodiment 1, which is installed on the main circuit board near the power controller IC. One end of the low-power pulse transformer is connected to a switch tube (such as MOSFET), and the other end is connected to a rectifier and filter circuit for energy conversion and voltage isolation.

[0074] Embodiment 4

[0075] This embodiment provides an LED driving circuit, including the low-power pulse transformer described in the above-mentioned embodiment 1. In the LED driving circuit, the pulse transformer is installed close to the driving IC, one end is connected to the driving IC output, and the other end is connected to the LED lamp bead or the series / parallel LED lamp group through an appropriate circuit to provide constant current drive.

[0076] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0077] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0079] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0080] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A low-power pulse transformer, characterized in that: include: A magnetic core assembly (1) and a bowl-shaped plastic housing (2); The magnetic core assembly (1) is fixedly mounted inside the plastic housing (2), and a metal pin (3) is fixedly mounted on the horizontal outer side of the plastic housing (2) having an open side; The magnetic core assembly (1) comprises: a toroidal skeleton (11), a wire package having lead wires, a first magnetic core (12) and a second magnetic core (13) having a cylindrical protrusion at the center of one side thereof matching the size of an inner ring of the skeleton; The wire package is wound around the outer ring surface of the skeleton (11), the skeleton (11) is arranged between the first magnetic core (12) and the second magnetic core (13), the protrusion of the first magnetic core (12) and the protrusion of the second magnetic core (13) are both located in the inner ring of the skeleton (11), and the mutual contact surfaces of the protrusion of the first magnetic core (12) and the protrusion of the second magnetic core (13) are connected by an adhesive, and the lead wire of the wire package is welded to the corresponding metal pin (3).

2. The low-power pulse transformer according to claim 1, characterized in that: A first baffle (14) and a second baffle (15) are respectively arranged at two ends of the frame (11) having an opening; The first baffle (14) and the second baffle (15) are perpendicular to the outer ring surface of the frame (11); An insulating pad is provided between the first baffle (14) and the bottom surface of the first magnetic core (12), and an insulating pad is provided between the second baffle (15) and the bottom surface of the second magnetic core (13).

3. The low-power pulse transformer according to claim 2, characterized in that: Two notches are respectively provided on the edge positions of the first baffle plate (14) and the second baffle plate (15), and the notch position on the first baffle plate (14) corresponds to the notch position on the second baffle plate (15) in the direction of the inner center line of the inner ring of the frame (11).

4. The low-power pulse transformer according to claim 3, characterized in that: Two notches are provided on the bottom surface of the first magnetic core (12) at the same positions as the notches on the first baffle (14); Two notches are provided on the bottom surface of the second magnetic core (13) at the same positions as the notches on the second baffle (15).

5. The low-power pulse transformer according to claim 4, characterized in that: A first protective plate (16) and a second protective plate (17) are arranged on the same side of the first magnetic core (12) having the protrusion. The first protection plate (16) and the second protection plate (17) are located at the bottom edge of the first magnetic core (12), and the first protection plate (16) and the second protection plate (17) are perpendicular to the bottom surface of the first magnetic core (12); A third protection plate and a fourth protection plate are arranged on the same side of the second magnetic core (13) having the protrusion. The third protection plate and the fourth protection plate are located at the bottom edge of the second magnetic core (13), and the third protection plate and the fourth protection plate are perpendicular to the bottom surface of the second magnetic core (13).

6. The low-power pulse transformer according to claim 5, characterized in that: The first protection plate (16) and the second protection plate (17) are respectively arranged on both sides of two notches on the bottom surface of the first magnetic core (12); The third protection plate and the fourth protection plate are respectively arranged on both sides of two notches on the bottom surface of the second magnetic core (13).

7. The low-power pulse transformer according to claim 6, characterized in that: Both ends of two notches on the first protection plate (16) and the second protection plate (17) close to the bottom surface of the first magnetic core (12) are smooth arc planes; Both ends of the two notches on the third protection plate and the fourth protection plate close to the bottom surface of the second magnetic core (13) are smooth arc planes.

8. The low-power pulse transformer according to claim 1, characterized in that: A hole is provided at the middle position of the protrusion of the first magnetic core (12) and passes through the entire protrusion and the bottom surface of the first magnetic core (12); A hole is provided in the middle of the protrusion of the second magnetic core (13) and passes through the entire protrusion and the bottom surface of the second magnetic core (13).

9. The low-power pulse transformer according to claim 1, characterized in that: A recessed structure corresponding to the shape of the outer edge of the magnetic core component (1) is arranged inside the housing (2).

10. A charger, characterized in that: It comprises the low-power pulse transformer as described in any one of claims 1 to 9 above, and the low-power pulse transformer is embedded in a PCB board inside the charger.

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