線簧插孔，全稱為單葉回轉(zhuǎn)雙曲面線簧插孔，是電連接器（即接插件）產(chǎn)品上使用的一種高可靠插孔組件。其孔內(nèi)由多根彈性鍍金或鍍銀金屬絲按單葉回轉(zhuǎn)雙曲面的直母線排列，并與內(nèi)套直母線形成一夾角。當插針插入線簧孔時，線簧絲在徑向和軸向都會發(fā)生彈性變形，插針即與線簧孔中多根獨立的線簧絲同時接觸，構(gòu)成多個獨立的電流通路。

線簧插孔具有以下突出優(yōu)點：

接觸電阻低而穩(wěn)定：當航空插座插入時，這些彈性金屬絲會緊緊地包圍在插座周圍，產(chǎn)生多線接觸，一對針眼可以作為幾對一般針、孔并聯(lián)使用。

插拔力?。翰灏芜^程較為柔和。

接觸件磨損低：能減少接觸部位的磨損。

插拔壽命長：插拔次數(shù)可達5000次以上。

可靠性高：在強力振動沖擊環(huán)境中，能保持電接觸的高可靠性（瞬斷時間小于1μs）。

由于具備上述優(yōu)良性能，線簧插孔主要用于各種關(guān)鍵設(shè)備用連接器，如航空航天、武器裝備、醫(yī)療設(shè)備、汽車電子測試、鐵路機車車輛、電子通訊、智能設(shè)備、石油、化工、勘探等領(lǐng)域。

根據(jù)不同的需求和應(yīng)用場景，線簧插孔可能會有一些特殊的設(shè)計和改進。例如密繞雙曲面線簧插孔，它采用特殊的裝配方法把幾十根乃至上百根高彈性線簧絲沿基體孔內(nèi)壁一根挨一根密繞而成，具有極低的接觸電阻、體積小、插拔力柔和、抗震動、耐沖擊、插拔壽命長等特點，且在高震動、耐沖擊場合其瞬斷時間小于1μs，在信號保真和大電流傳輸方面表現(xiàn)出色，可替代傳統(tǒng)的雙曲面線簧插孔，在軍工連接器、電源連接器、高可靠控制連接器等方面逐步推廣使用。

另外，還有無內(nèi)套線簧孔，它相對于一些現(xiàn)有技術(shù)中的無內(nèi)套線簧孔，不需要再設(shè)置過渡芯軸，可相對縮短整個線簧孔的軸向長度，利于產(chǎn)品的高精密集成化發(fā)展。其包括前護套、線簧絲和端接后套。線簧絲形成雙曲面結(jié)構(gòu)，前端與前護套前端固定連接；端接后套前端沿周向分布有多個限位槽，其前端插接裝配在前護套中，線簧絲一一對應(yīng)地定位插裝在限位槽中，在兩者相對轉(zhuǎn)動設(shè)定角度并固定裝配在一起時，線簧絲的前端和后端周向錯位而形成雙曲面結(jié)構(gòu)，后端設(shè)置用于連接到對應(yīng)線路的端接結(jié)構(gòu)。

在實際應(yīng)用中，選擇線簧插孔時，需要考慮具體的設(shè)備要求、工作環(huán)境、電流負載等因素，以確保其能夠滿足特定的連接需求和可靠性要求。

Introduction of Wire Spring Socket

Spring-Loaded Connectors, officially known as Single-Leaf Rotational Hyperboloid Spring-Loaded Connectors, are a type of high-reliability socket component used in electrical connectors (i.e., plug-and-socket products). The socket contains multiple elastic metal wires, either gold-plated or silver-plated, arranged in a single-leaf rotational hyperboloid along the principal axis, forming an angle with the inner sleeve’s principal axis. When a pin is inserted into the spring-loaded socket, the spring wires undergo elastic deformation both radially and axially, allowing the pin to make contact with multiple independent spring wires simultaneously.

Advantages of Spring-Loaded Connectors include:

· Low and Stable Contact Resistance: When an aviation plug is inserted, the elastic metal wires tightly encircle the plug, creating multiple line contacts. A pair of pins can be used as several pairs of standard pins and sockets in parallel.

· Low Insertion/Removal Force: The insertion and removal process is relatively smooth.

· Low Wear on Contacts: This reduces wear on the contact points.

· Long Insertion/Removal Life: The connector can withstand more than 5000 insertion/removal cycles.

· High Reliability: It maintains high electrical contact reliability even in strong vibration and shock environments (with a break time of less than 1μs).

Due to these excellent properties, spring-loaded connectors are primarily used in critical equipment connectors, such as in aerospace, weaponry, medical devices, automotive electronics testing, railway locomotives and vehicles, electronic communications, smart devices, oil and chemical industries, exploration, and other fields.

Special Designs and Improvements may be found based on different needs and application scenarios. For example:

· Tightly Wound Hyperboloid Spring-Loaded Connectors: These use a special assembly method where dozens to hundreds of high-elasticity spring wires are wound tightly along the inner wall of the base hole. They feature extremely low contact resistance, compact size, smooth insertion/removal force, vibration resistance, shock resistance, and long insertion/removal life. In high-vibration and shock-resistant applications, their break time is less than 1μs, demonstrating excellent signal fidelity and high current transmission, making them a viable alternative to traditional hyperboloid spring-loaded connectors. They are gradually being promoted in military connectors, power connectors, and high-reliability control connectors.

· Non-Inner-Sleeve Spring-Loaded Connectors: Unlike some existing technologies, these do not require an intermediate core shaft, which can shorten the axial length of the entire spring-loaded connector, facilitating the development of highly precise and integrated products. This type includes a front sleeve, spring wires, and an end-terminals sleeve. The spring wires form a hyperboloid structure, with the front end fixed to the front sleeve. The end-terminals sleeve has multiple limiting slots distributed around the circumference at its front end. This sleeve is assembled into the front sleeve, and the spring wires are positioned in the limiting slots. When the two components are rotated to a set angle and fixed together, the front and rear ends of the spring wires are circumferentially displaced to form a hyperboloid structure. The rear end is designed for connection to the corresponding circuit.

In practical applications, when selecting a spring-loaded connector, it is necessary to consider specific equipment requirements, working environment, and current load to ensure that it meets the specific connection and reliability requirements.