Terminal connection structure and magnetic element

Abstract

The invention discloses a terminal connection structure and a magnetic element, and relates to the technical field of electronic elements. The terminal connection structure comprises a terminal and an insulating base; one end of the terminal is a pin outlet part for connecting an external circuit, and the other end of the terminal is a wiring part with an inner deep hole; the side wall of the insulating base is provided with a mounting plate with a clamping groove with a lateral opening; the terminal can be installed in the clamping groove through the lateral opening in a buckling matching mode, and axial limiting is achieved through matching of bosses distributed at intervals in the axial direction of the terminal and limiting grooves in the installation plate. And a winding lead can be directly inserted into the inner deep hole of the coaxial wiring part for welding. Through buckle type vertical installation and inner deep hole direct insertion welding design, the problems that a traditional terminal is tedious in assembly step, difficult in welding operation and large in occupied space are solved, and the terminal has the advantages of being convenient and fast to assemble, reliable in welding and compact in structure and is particularly suitable for magnetic elements such as transformers and inductors in the fields of new energy vehicle-mounted power supplies and the like.

Description

Technical Field

[0001] This invention relates to the field of electronic component technology, and in particular to a terminal connection structure and a magnetic component. Background Technology

[0002] In power electronics, magnetic components (such as transformers and inductors) are crucial. These components typically require terminals to connect their winding leads to external circuits, such as printed circuit boards (PCBs). Therefore, the reliability, ease of assembly, and space utilization of the terminal connection structure directly affect the performance of magnetic components and the efficiency of production and assembly.

[0003] Currently, common magnetic component terminal connection methods mostly use metal terminal pieces (such as C-type or U-type structures) to directly clamp the winding leads, and then fix them by soldering. This traditional structure and assembly method have the following significant drawbacks: (1) Traditional terminals are mostly horizontally mounted. During assembly, the terminals need to be placed in a specific direction first, then the leads are wrapped and clamped using C-shaped or U-shaped clamps, and finally soldered. This process involves many steps, requires high alignment, is not conducive to automated production, and has low assembly efficiency.

[0004] (2) Due to structural limitations, the soldering points of traditional terminals are often located in “extreme positions” where space is extremely limited or visibility is poor, which makes soldering operations difficult and easily leads to problems such as poor soldering and cold soldering, affecting the long-term stability of electrical connections.

[0005] (3) The horizontally mounted terminals and their clamping structures unfold in three-dimensional space, resulting in a large overall volume. This contradicts the current design trend of miniaturization and high-density integration of electronic devices, limiting their application in compact products (such as power modules for new energy vehicles). Summary of the Invention

[0006] The purpose of this invention is to provide a terminal connection structure and magnetic element to solve the problems existing in the prior art and improve the convenience of terminal welding.

[0007] To achieve the above objectives, the present invention provides the following solution: This invention provides a terminal connection structure, comprising: A terminal, one end of which is configured as a lead for connection to an external circuit, and the other end of which is configured as a wire for connection to a lead wire; An insulating base, wherein a mounting plate is provided on the side wall of the insulating base, and the mounting plate is provided with a slot with a side opening; The terminal can be installed in the slot through the side opening, and when the terminal is installed in the slot, the terminal passes through the slot along its own axis. The wiring part is provided with an inner deep hole for the lead wire to extend into and be welded and fixed.

[0008] Preferably, the protruding part is a solid cylindrical structure.

[0009] Preferably, the terminal has two protrusions spaced apart along the axial direction of the terminal, and the mounting plate has limiting grooves corresponding to the protrusions. When the terminal is installed in the slot, the protrusion is located in the corresponding limiting groove, and the protrusion and the limiting groove cooperate to limit the displacement of the terminal along its own axial direction.

[0010] Preferably, the lead is configured to be inserted into a pad hole on a circuit board.

[0011] Preferably, the terminal is inserted into the slot and removed from the slot through the lateral opening.

[0012] Preferably, the wiring portion, the inner deep hole, and the protruding foot portion are coaxial.

[0013] Preferably, the insulating base is made of plastic.

[0014] The present invention also provides a magnetic element, including a winding and the aforementioned terminal connection structure, wherein the lead wire of the winding is inserted into and welded to the inner deep hole of the terminal in the terminal connection structure; the winding is mounted on the insulating base.

[0015] Preferably, the magnetic element is a transformer or an inductor.

[0016] Preferably, the magnetic element is used in the field of new energy vehicle power supply.

[0017] The present invention achieves the following technical effects compared to the prior art: The terminal connection structure and magnetic components of this invention feature a snap-fit ​​design where terminals are directly inserted into the slots of a plastic base. Precise positioning is achieved through the cooperation of a boss and a limiting structure, enabling rapid terminal insertion. This eliminates the cumbersome clamping and pre-fixing steps of traditional methods, resulting in simple and consistent assembly. This is particularly suitable for automated production lines, significantly improving the assembly efficiency of magnetic components. The terminal's wiring portion has a deep inner hole, allowing winding leads to be directly and straightly inserted for soldering. This ensures clear solder joint locations and ample operating space, avoiding the soldering difficulties caused by limited soldering positions in traditional methods. It effectively reduces the risk of cold solder joints and significantly improves the success rate of soldering and the long-term reliability of electrical connections. This invention simplifies the connection structure between the terminal and the base, employing a compact vertical layout. Compared to traditional horizontal installations and C / U-shaped clamping structures, this significantly reduces the overall space occupied. This facilitates the miniaturization and high-density layout of magnetic components and their associated power modules, making it particularly suitable for space-constrained applications such as new energy vehicle power supplies. The terminal, installed within the slot, works in conjunction with the upper and lower bosses for locking, ensuring secure fixation in all directions after insertion. This effectively prevents loosening or detachment due to vibration or stress relaxation, enhancing the mechanical stability and durability of the entire connection structure. The terminal's lead can be a solid cylindrical structure, with easily controllable dimensional tolerances. This allows for precise fitting of standard circular pad holes on the terminal circuit board (PCB), enabling quick-connect interlocking and meeting the market's widespread demand for cylindrical leads. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the terminal connection structure of the present invention; Figure 2 This is a schematic diagram of the base in the terminal connection structure of the present invention; In the diagram: 1. Base; 2. Mounting plate; 3. Lead wire; 4. Wiring part; 5. Protruding foot; 6. Boss; 7. Winding; 8. Slot; 9. Limiting groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The purpose of this invention is to provide a terminal connection structure and magnetic element to solve the problems existing in the prior art and improve the convenience of terminal welding.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a terminal connection structure, including: The terminal has one end configured as a lead 5 for connection to an external circuit and the other end configured as a wiring part 4 for connection to a lead wire 3. An insulating base 1 has a mounting plate 2 on its side wall, and the mounting plate 2 has a slot 8 with a side opening. The terminal can be installed in the slot 8 through a side opening and by a snap-fit ​​mechanism. When the terminal is installed in the slot 8, it passes through the slot 8 along its own axis. The wiring part 4 is provided with an inner deep hole for the lead wire 3 to be inserted and welded. The lead wire 3 of the winding 7 can be directly and straightly inserted into the inner deep hole for welding, which makes the welding point position clear and the operating space ample. This avoids the welding difficulties caused by the overly limited welding position in the traditional method, effectively reduces the risk of cold welding and poor welding, and thus greatly improves the welding success rate and the long-term reliability of the electrical connection.

[0024] In the optional solutions of this embodiment, it is more preferred that the terminals are inserted into and removed from the slot 8 through a side opening. The terminal connection structure of this embodiment engages the terminals with the slot 8, and the terminals are inserted into and removed from the slot 8 through a side opening, i.e., side installation and removal, which is convenient to use and facilitates the installation and removal of terminals.

[0025] In the optional solutions of this embodiment, the preferred option is that the lead 5 is a solid cylindrical structure. The dimensional tolerance of the cylindrical lead 5 is easy to control, and it can accurately fit the standard circular pad holes on the terminal circuit board (PCB) to achieve good quick-connect docking and meet the general market demand for cylindrical leads.

[0026] In the optional scheme of this embodiment, a preferred embodiment has two protrusions 6 spaced apart along the axial direction of the terminal. The mounting plate 2 has limiting grooves 9 corresponding to the protrusions 6. When the terminal is installed in the slot 8, the protrusions 6 are located in the corresponding limiting grooves 9. The protrusions 6 and the limiting grooves 9 cooperate to limit the displacement of the terminal along its own axial direction. The snap-fit ​​between the terminal and the slot 8, combined with the limiting cooperation between the two protrusions 6 and the two limiting grooves 9, can accurately position the terminal on the mounting plate 2, realizing the rapid insertion of the terminal. This eliminates the cumbersome steps such as clamping and pre-fixing in the traditional method. The assembly action is simple and consistent, which is particularly suitable for automated production lines and significantly improves the assembly efficiency of magnetic components. The composite structure of the terminal being installed in the slot 8 and the limiting of the upper and lower protrusions 6 together ensures that the terminal is firmly fixed in all directions after being snapped in, effectively preventing the terminal from loosening or falling off due to vibration or stress relaxation, and enhancing the mechanical stability and durability of the entire connection structure. In addition, the terminals are set vertically, the slots 8 and two limiting grooves 9 are also distributed in the vertical direction, and the two bosses 6 are distributed vertically at intervals. Compared with the traditional horizontal installation and C / U-shaped clamping structure, the overall space occupation is significantly reduced. This is conducive to the miniaturization and high-density layout of magnetic components and their power modules, especially suitable for application scenarios with demanding space requirements, such as new energy vehicle power supplies.

[0027] In the optional embodiments of this example, it is more preferred that the lead 5 is configured to be inserted into the pad hole of the circuit board, so that the lead 5 of the terminal itself becomes the interface for docking with the PCB, eliminating the need for additional soldering of sockets on the PCB or the use of other adapters. When installing the magnetic component onto the PCB, it is only necessary to directly align the lead 5 of the terminal with the pre-made pad hole on the PCB for subsequent soldering (or crimping). The assembly action is simple and the alignment is intuitive, which is very beneficial for automated production and significantly improves the assembly efficiency of the entire electronic module.

[0028] In the optional schemes of this embodiment, it is more preferred that the wiring part 4, the inner deep hole and the lead part 5 are coaxial. The coaxial design allows the winding 7 lead 3 to be directly and smoothly inserted into the inner deep hole along a straight path without the need to adjust the angle or bend the lead 3 during the insertion process. This simplifies the operator's actions, reduces the complexity of the robot's path planning and the alignment accuracy requirements in automated assembly, makes the "direct insertion" action very reliable, and greatly improves the assembly efficiency.

[0029] In the optional solutions of this embodiment, it is more preferred that the material of the insulating base 1 is plastic. Plastic material is very suitable for injection molding, which can efficiently and accurately manufacture the insulating base 1 with complex and delicate structures such as the side slot 8 and the limiting groove 9 in this application. This makes the "snap-fit" installation method economical and reliable, which is the basis for the terminals to be quickly and accurately inserted and removed.

[0030] Example 2 like Figure 1 and Figure 2 As shown, this embodiment provides a magnetic element, including a winding 7 and a terminal connection structure as described in Embodiment 1. The lead wire 3 of the winding 7 is inserted into and welded to the deep hole inside the terminal in the terminal connection structure; the winding 7 is mounted on an insulating base 1.

[0031] In the optional embodiments of this example, the magnetic element is preferably a transformer or an inductor.

[0032] In the optional solutions of this embodiment, the magnetic element is preferably applied in the field of new energy vehicle power supply.

[0033] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A terminal connection structure characterized by comprising: include: A terminal, one end of which is configured as a lead for connection to an external circuit, and the other end of which is configured as a wire for connection to a lead wire; An insulating base, wherein a mounting plate is provided on the side wall of the insulating base, and the mounting plate is provided with a slot with a side opening; The terminal can be installed in the slot through the side opening, and when the terminal is installed in the slot, the terminal passes through the slot along its own axis. The wiring part is provided with an inner deep hole for the lead wire to extend into and be welded and fixed.

2. The terminal connection structure according to claim 1, characterized by: The protruding part is a solid cylindrical structure.

3. The terminal connection structure according to claim 1, characterized in that: The terminal has two protrusions spaced apart along the axial direction of the terminal. The mounting plate has a limiting groove corresponding to each protrusion. When the terminal is installed in the slot, the protrusion is located in the corresponding limiting groove. The protrusion and the limiting groove cooperate to limit the displacement of the terminal along its own axial direction.

4. The terminal connection structure according to claim 1, characterized in that: The protruding pins are configured to be inserted into the pad holes of the circuit board.

5. The terminal connection structure according to claim 1, characterized in that: The terminal is inserted into and removed from the slot through the lateral opening.

6. The terminal connection structure according to claim 1, characterized in that: The wiring section, the inner deep hole, and the protruding foot are coaxial.

7. The terminal connection structure according to claim 1, characterized in that: The insulating base is made of plastic.

8. A magnetic element, characterized in that: The device includes a winding and a terminal connection structure according to any one of claims 1 to 7, wherein the lead wire of the winding is inserted into and welded to the inner deep hole of the terminal in the terminal connection structure; the winding is mounted on the insulating base.

9. The magnetic element according to claim 8, characterized in that: The magnetic element is a transformer or an inductor.

10. The magnetic element according to claim 8, characterized in that: The magnetic component is used in the field of new energy vehicle power supply.

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