A micro connector with a small outer diameter plastic sheath

Abstract

The application provides an SMT mounting and wire leading-out micro connector with a small outer diameter plastic sheath, comprising: a plastic sheath, at least one conductive terminal arranged in the plastic sheath; the plastic sheath is located in the middle of the micro connector; the length of the plastic sheath is less than or equal to 5 mm, and the diameter of the plastic sheath is less than or equal to 3 mm; the conductive terminal is a solid metal conductor, the conductive terminal is arranged in the plastic sheath and extends along the length direction of the micro connector, one end of the conductive terminal extends out of one side of the plastic sheath and an SMT mounting connecting part is arranged at the end of the conductive terminal, the SMT mounting connecting part is used for mounting and welding with a pad on a circuit board; the other end of the conductive terminal extends out of the other side of the plastic sheath and a wire leading-out connecting part is arranged at the end of the conductive terminal, the wire leading-out connecting part is used for welding connection with an external wire. The application has the advantages that: the micro connector can smoothly pass through smaller mounting holes or shell holes, and is particularly suitable for product designs with limited space and compact structure.

Description

Technical Field

[0001] This invention relates to the field of electronic connector technology, and more specifically to a miniature connector suitable for power or signal transmission. More specifically, it relates to a fixed miniature connector with a small outer diameter plastic sheath, capable of passing through a small mounting hole, and with one end suitable for SMT mounting and the other end suitable for wire bonding. Background Technology

[0002] In various miniaturized electronic products, smart terminals, automotive electronic devices, micro modules and other precision electronic components, it is often necessary to stably lead the power or signals on the circuit board to external wires or other connecting parts.

[0003] In some application scenarios, connectors not only need to perform conductive or signal transmission functions, but also need to meet the following assembly requirements: 1. The connector body needs to pass through a small hole for installation; 2. The connector size should be as small as possible to adapt to the layout of narrow spaces; 3. One end of the connector needs to be SMT mounted to the circuit board; 4. The other end of the connector needs to be soldered to the wire.

[0004] However, existing products still have the following shortcomings: 1. Existing connectors are too large in size, which is not conducive to installation through small holes. Many conventional connectors are designed with a large outer diameter to ensure structural strength or ease of assembly, which makes it impossible for them to pass smoothly through small mounting holes or housing holes, which is not conducive to miniaturization and compact product design.

[0005] 2. Pogo pin connectors are not suitable for the fixed soldering lead-out structure of this solution. Some existing miniature connectors use a pogo pin structure. These products typically rely on internal springs, pin cores, pin tubes, and other moving parts to achieve elastic contact and conduction, and are mainly suitable for compressible contact scenarios. However, for fixed connection requirements where one end needs to be mounted on a circuit board and the other end is soldered to a wire, the pogo pin structure is not suitable as the main technical route, and its design focus is not on the installation advantage of "small outer diameter plastic sheath that can pass through small holes".

[0006] 3. Existing soldered lead-out structures struggle to simultaneously achieve both "small outer diameter" and "connection reliability." Simply reducing connector size can easily lead to problems such as insufficient terminal strength, inconvenient soldering operations, and unstable insulation support. Especially in scenarios requiring both miniaturization of the connector body and board-side mounting and wire-side soldering, existing structures often fail to balance size, installation methods, and connection reliability.

[0007] Therefore, it is still necessary to provide a new connector structure to solve the above problems. Summary of the Invention

[0008] In view of the above problems, the purpose of this invention is to provide a miniature connector for SMT mounting and wire bonding with a small outer diameter plastic sheath. It adopts a structure of solid conductive terminals and insulating plastic sheath, so that while maintaining a small overall size, the overall conductive path structure is stable, which is convenient for assembly and use.

[0009] The present invention provides a micro connector for SMT mounting and wire bonding with a small outer diameter plastic sheath, comprising: a plastic sheath and at least one conductive terminal disposed inside the plastic sheath; The plastic sheath is located in the middle of the miniature connector and serves to insulate, fix, and support the internal conductive terminals. It is designed with a small outer diameter to allow the entire connector to pass through small mounting holes, housing holes, or limiting holes. The plastic sheath has a length ≤5mm and a diameter ≤3mm for the tubular body. The conductive terminal is a solid metal conductor, located inside a plastic sheath and extending along the length of the miniature connector. One end of the conductive terminal extends from one side of the plastic sheath and has an SMT (Surface Mount Technology) mounting connection at its end. This SMT mounting connection is used for mounting and soldering to pads on the circuit board, thereby ensuring stable mounting of the connector on the circuit board and achieving board-side electrical connection. The other end of the conductive terminal extends from the other side of the plastic sheath and has a wire lead-out connection at its end. This wire lead-out connection is used for soldering to external wires to achieve stable power or signal output. Depending on actual needs, the wire lead-out connection can be designed to facilitate soldering, tinning, lap soldering, or accommodate wire ends, thereby improving the ease of wire soldering and connection strength.

[0010] As a preferred embodiment of the present invention, the plastic sheath is made of insulating plastic material.

[0011] As a preferred embodiment of the present invention, the conductive terminals are configured as two, spaced apart from each other and insulated from each other by a plastic sheath, so as to transmit power or signals respectively.

[0012] As a preferred embodiment of the present invention, each of the solid metal conductors is made of copper or copper alloy and has a plating layer on its surface to improve conductivity, weldability and oxidation resistance.

[0013] The advantages and positive effects of this invention are: 1. The present invention has the advantages of a small outer diameter of plastic sheath, which allows it to pass through smaller holes. The outer diameter of the middle plastic sheath is also small, which allows it to pass smoothly through smaller mounting holes or housing holes. It is particularly suitable for product designs with limited space and compact structure.

[0014] 2. The present invention has the advantages of facilitating product miniaturization and high-density layout. By reducing the external size of the plastic sheath, the space occupied by the internal installation can be effectively reduced, which facilitates higher layout flexibility and structural integration in small electronic devices.

[0015] 3. The present invention has the advantages of one end for SMT mounting and the other end for wire bonding, with a clear connection method. It can realize the transition connection between the board end and the wire end. One end is suitable for SMT mounting and the other end is suitable for wire bonding. It has strong applicability and is easy to assemble.

[0016] 4. The present invention uses solid conductive terminals, which have the advantages of more direct and stable conduction. Compared with spring pin connectors that rely on elastic contact to achieve conduction, the solid conductive terminals directly conduct, resulting in a simpler structure, a more direct conduction path, and better connection stability.

[0017] 5. The present invention has the advantages of simple structure and convenient manufacturing and assembly. It consists only of a plastic sheath and conductive terminals. The number of parts is small and the processing and assembly process is relatively simple, which is conducive to mass production and quality control. Attached Figure Description

[0018] Figure 1 This is the main view of the overall structure in this embodiment.

[0019] Figure 2 This is a side view of the overall structure in this embodiment.

[0020] Figure 3 This is a cross-sectional view of the connector in this embodiment.

[0021] Figure 4 This is a cross-sectional view of the connector in its working state in this embodiment. Detailed Implementation

[0022] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0023] See Figure 1-4This embodiment provides a miniature SMT mounting and wire bonding connector with a small outer diameter plastic sheath, comprising: a plastic sheath 1 and two conductive terminals 2 disposed inside the plastic sheath 1; the plastic sheath 1 is located in the middle of the miniature connector and is used for insulating, fixing the position of the internal conductive terminals 2 and providing external support; the plastic sheath is made of insulating plastic material; the length of the plastic sheath 1 is ≤5mm and the diameter is ≤3mm, forming a cylindrical body; the plastic sheath 1 is designed with a small outer diameter, allowing the entire connector to pass through a small mounting hole, housing hole or limiting hole. The main advantages of the small outer diameter of the plastic sheath 1 are: (1) it is conducive to installation through a smaller hole; (2) it is conducive to reducing the opening size of the product; (3) it is conducive to saving internal space; (4) it is conducive to the overall miniaturization design of electronic products. Both conductive terminals 2 are solid metal conductors, and the two conductive terminals 2 are spaced apart from each other and kept insulated by the plastic sheath to transmit power or signals respectively. Each solid metal conductor is made of copper or a copper alloy and has a plating layer on its surface to improve conductivity, solderability, and oxidation resistance. Conductive terminals 2 are located inside the plastic sheath 1 and extend along the length of the miniature connector. One end of the conductive terminal 2 extends from one side of the plastic sheath and has an SMT (Surface Mount Technology) mounting connection 3 at its end. The SMT mounting connection 3 is used for mounting and soldering to the pads on the circuit board 4, thereby ensuring stable mounting of the connector on the circuit board 4 and achieving board-end electrical connection. The other end of the conductive terminal 2 extends from the other side of the plastic sheath 1 and has a wire lead-out connection 5 at its end. The wire lead-out connection 5 is used for soldering to external wires to achieve stable power or signal output to the outside. Depending on actual needs, the wire lead-out connection can be designed to facilitate soldering, tinning, lap soldering, or accommodate the wire end, improving the ease of wire soldering and connection strength.

[0024] Working principle: First, compared to conventional connectors, the outer diameter of the plastic sheath 1 in this embodiment is controlled to be smaller, allowing the connector body to pass through smaller mounting holes or housing through-holes, thus adapting to assembly scenarios with limited space and compact structures. It is precisely because of this small outer diameter structural design that this connector has significant advantages in the use of microelectronic components, precision assembly structures, and miniaturized products.

[0025] Secondly, the conductive terminal 2 is made of copper or copper alloy, and a gold layer, tin layer, or other suitable plating for welding and oxidation prevention can be applied to its surface according to usage requirements to improve conductivity, welding performance, and long-term stability. The conductive terminal 2 adopts a solid structure without springs, telescopic pins, movable pin tubes, balls, or other elastic contact components, thus its conduction path is more direct, and the overall structure is simpler and more stable.

[0026] Furthermore, one end of the conductive terminal 2 is configured as a mounting end suitable for connection with the circuit board 4. This end extends from one side of the plastic sheath 1 and can be mounted and soldered to the pads on the printed circuit board 4, thereby achieving fixation and conductivity between the connector and the circuit board 4. The other end of the conductive terminal 2 is configured as a wire lead-out connection portion 5 suitable for connection with external wires. This end extends from the other side of the plastic sheath 1 and forms a structure that facilitates solder adhesion and wire connection, so that external wires can be reliably soldered to this end, realizing the outward lead-out of power or signals.

[0027] In practical applications, the connector can be first inserted into the mounting holes on the product structure through its small outer diameter plastic sleeve 1, utilizing its small size to accommodate assembly requirements with smaller holes. After installation, one end is SMT-mounted to the circuit board 4, and the other end is soldered to the external conductor, thus forming a stable conductive path between the board end and the wire end. Because this connector uses a solid conductive structure rather than a spring-loaded movable contact structure, it is more suitable for fixed installations, long-term conductivity, and stable lead connection scenarios in confined spaces.

[0028] Finally, the key to this solution lies not in employing a flexible contact method, but in achieving a miniature connection structure that can pass through small holes while simultaneously accommodating board mounting and wire soldering, through the cooperation of a small-diameter plastic sheath and internal solid conductive terminals. Therefore, this solution differs significantly from spring-loaded connectors in its structural principle, usage, and functional focus.

[0029] The specific length, outer diameter, number of conductive terminals, end shape, and selected material of the plastic sheath in this invention can be adjusted according to the installation space, current requirements, welding method, and signal type of different products. As long as the overall technical concept still falls within the structural scope of the small outer diameter plastic sheath combined with solid conductive terminals described in this invention, it should be considered within the protection scope of this invention.

Claims

1. A micro connector for SMT mounting and wire bonding with a small outer diameter plastic sheath, characterized in that, include: A plastic sheath and at least one conductive terminal disposed inside the plastic sheath; The plastic sheath is located in the middle of the miniature connector and is used to insulate, fix the position of the internal conductive terminals and provide external support; the plastic sheath is a tubular body with a length ≤5mm and a diameter ≤3mm. The conductive terminal is a solid metal conductor, disposed inside the plastic sheath and extending along the length of the micro connector. One end of the conductive terminal extends from one side of the plastic sheath and has an SMT mounting connection portion at its end, which is used for mounting and soldering to pads on the circuit board. The other end of the conductive terminal extends from the other side of the plastic sheath and has a wire lead-out connection portion at its end, which is used for soldering to external wires.

2. The SMT mounting and wire bonding micro connector with a small outer diameter plastic sheath according to claim 1, characterized in that, The plastic sheath is made of insulating plastic material.

3. A micro connector for SMT mounting and wire bonding with a small outer diameter plastic sheath as described in claim 1, characterized in that, The conductive terminals are configured as two, spaced apart from each other and insulated from each other by a plastic sheath, so as to transmit power or signals respectively.

4. A micro connector for SMT mounting and wire bonding with a small outer diameter plastic sheath as described in claim 1, characterized in that, Each of the solid metal conductors is made of copper or a copper alloy and has a plating layer on its surface to improve conductivity, weldability and oxidation resistance.

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