US-12625327-B2 - SC type of connector with stable structure and easy installation

US12625327B2US 12625327 B2US12625327 B2US 12625327B2US-12625327-B2

Abstract

Provided herein is an SC connector with a stable structure and an easy assembly. The SC connector has the characteristics of compact assembly, and the assembly mode of its inner core structure is more conducive to the integration after assembly. Especially after adhesive injection, as the mold closing seam of the inner core structure is not a split structure in the general sense, it is not easy to be separated and broken due to external force action, achieving better stability than existing general products. It can effectively prolong the service life of equipment in low-frequency vibration environment. As a pre-assembled connector with good performance, it can be easily assembled and reliable when used on-site, and can be quickly applied to line assemblies.

Inventors

Yaole LI

Assignees

Huizhou Fibercan Industrial Co., LTD

Dates

Publication Date: 20260512
Application Date: 20240126
Priority Date: 20231128

Claims (9)

1 . An SC type of connector, comprising a cable body including an optical cable and a cable sleeve wrapping the optical cable, wherein the connector comprises a housing, a front sleeve and a rear sleeve, wherein the optical cable passes through a plug core rear base and is connected with a plug core, and an end of the plug core rear base proximate to the plug core is provided with a semi-arc limiting convex ring formed by a semi-arc transition section and a limiting section having a recess, an outer surface of the plug core rear base is sleeved with a limiting spring with one end abutting against an end face of the semi-arc limiting convex ring, an end of the plug core rear base proximate to the cable sleeve is provided with a limiting ring, and a sleeve covering the limiting ring and a part of the cable sleeve is sleeved on the limiting ring, so that the limiting spring is limited between an end face of the sleeve and an end face of the semi-arc limiting convex ring; an inner cavity of the front sleeve is formed by four separate chambers, wherein the four chambers are respectively an open chamber for accommodating the plug core, a fixed chamber for accommodating the semi-arc limiting convex ring and the limiting spring, a bundling chamber for accommodating a part of the plug core rear base, and an introduction chamber for accommodating the cable sleeve, wherein the bundling chamber has a smaller inner diameter than its adjacent chambers; the front sleeve consists of a first front sleeve half-housing and a second front sleeve half-housing which are integrated as a whole, and the fixed chamber, the bundling chamber and the introduction chamber are all formed by the combination of the first front sleeve half-housing and the second front sleeve half-housing through closure, while the open chamber is completely formed by an inner cavity of the first front sleeve half-housing, and an outer surface of the front sleeve, at the introduction chamber, is provided with an engaging convex ring abutting against an inner wall of the rear sleeve; the front sleeve is clamped within the housing, and an end of the plug core extends to an outside of the housing through an opening at one end of the housing; and the rear sleeve is sleeved on the introduction chamber and the cable sleeve, and the front sleeve, at the introduction chamber, is provided with an engaging convex ring abutting against the inner wall of the rear sleeve.
2 . The connector according to claim 1 , wherein the first front sleeve half-housing and the second front sleeve half-housing are attached and combined with each other to form a complete front sleeve through two mating surfaces which are perpendicular to each other.
3 . The connector according to claim 2 , wherein the first front sleeve half-housing and the second front sleeve half-housing are connected by a snap fit connection consisting of a male part and a female part, and wherein the male part is arranged on any one of the first front sleeve half-housing and the second front sleeve half-housing, and the female part is arranged on another.
4 . The connector according to claim 3 , wherein in the case of that the male part is arranged on the first front sleeve half-housing and the female part is arranged on the second front sleeve half-housing, the female part extends from a wall at least partly defining the fixed chamber to a wall at least partly defining the introduction chamber.
5 . The connector according to claim 2 , wherein the first front sleeve half-housing and the second front sleeve half-housing are connected through a hole-shaft fit connection consisting of a hole and a shaft, wherein the shaft is arranged on any one of the first front sleeve half-housing and the second front sleeve half-housing, and the hole is arranged on another.
6 . The connector according to claim 1 , wherein the limiting section has a flat portion adjacent to the transition section, a bending portion adjacent to the flat portion, and a portion defining the recess.
7 . The connector according to claim 6 , wherein the flat portion of the limiting section has a thickness same as the transition section.
8 . The connector according to claim 1 , wherein the end of the plug core is spaced apart from the end of the cable sleeve, and the plug core rear base is arranged between the end of the cable sleeve and the end of the plug core, and the plug core rear base simultaneously wraps the end of the cable sleeve and the end of the plug core.
9 . The connector according to claim 1 , wherein a protective sleeve with one end abutting against the end face of the semi-arc limiting convex ring is sleeved on the plug core, and an end face of the protective sleeve is closely adhered to a bottom wall of the open chamber.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority under 35 U.S.C. § 119 (a) to Chinese Patent Application No. 202311601119.X, filed on Nov. 28, 2023, which is hereby incorporated by reference herein in its entirety. TECHNICAL FIELD The disclosure belongs to the technical field of optical fiber communication, in particular to a SC connector with a stable structure and an easy installation. BACKGROUND ART Optical fiber connectors can be typically divided into a single-mode connector or a multi-mode connector for silicon-based optical fibers, as well as other optical fiber connectors with plastic as transmission media. According to the head structure of connectors, optical fiber connectors can be divided into a type of FC, SC, ST, LC, D4, DIN, MU, MT and so on. Among them, ST connectors are usually used for wiring equipment, such as optical fiber distribution frames and optical fiber modules. SC and MT connectors are usually used on the network equipment. According to the shape of fiber end face, there are FC, PC (including SPC or UPC) and APC connectors. According to the number of optical fiber cores, there are single-core and multi-core (such as MT-RJ) connectors. Optical fiber connectors have a wide range of applications and various types. In practical applications, optical fiber connectors are generally distinguished based on their different structures. At present, CN212586598U discloses an SC-type optical fiber connector applied in on-site production, which comprises an inner housing assembly, an outer housing, a pin cylinder and a front end piece, wherein the inner housing assembly comprises an inner housing, a core and a connecting cylinder, the core is wrapped with a spring, and the connecting cylinder is sleeved at a right end of the core; outer wall of the connecting cylinder is provided with external threads; and the front end piece comprises a protective sleeve and a connecting sleeve, and the protective sleeve is sleeved at the right end of the connecting sleeve; and the inner wall of the connecting sleeve is provided with internal threads. This SC connector utilizes an internal and external threaded connection, thereby enhancing the stability of the assembled fiber optic body. In view of the above existing technology, the improvement on the stability of the inner housing assembly is achieved by connecting the connecting sleeve and the connecting cylinder by a threaded connection. The connecting structure has the advantage of higher static tightness and better reliability after assembling, but has the disadvantage that it needs to be screwed to realize assembly, making the assembling steps relatively complex. Additionally, the inner housing itself is an integral structure. For the mounting of the core with a spring, it is required that the spring should be completely inserted from an opening end of the inner housing for assembly. However, the positioning of the spring relies on abutting against the connecting cylinder, and the elastic force of the spring actually exerts a slight force in a circumferential direction to the threaded connection. Therefore, the tightness of the above-mentioned structural combination will be obviously affected in dynamic environments. Targeted at this, it may be considered improving the assembly structure of the inner housing to enhance the dynamic stability of the SC connector and simplify the assembling steps to some extent. SUMMARY Aiming at the technical defects existing in the background art, the disclosure provides a versatile inner core structure for an SC connector, and an SC connector using the inner core structure, which solves the technical problems and meets the practical requirements. The specific technical scheme is as follows. An SC connector with a stable structure and an easy installation comprises a cable body formed by wrapping an optical cable by a cable sleeve, and comprises a housing, a front sleeve and a rear sleeve, wherein the optical cable passes through a plug core rear base and is jointed with a plug core, and one end of the plug core rear base near the plug core is provided with a semi-arc limiting convex ring, and the cross-sectional profile of the semi-arc limiting convex ring is formed by mutually closing and jointing at least a semi-arc transition section and a limiting section symmetrical to a cross-sectional center and having a concave profile; the outer surface of the plug core rear base is tightly sleeved with a limiting spring with one end abutting against an end face of the semi-arc limiting convex ring; one end of the plug core rear base near the cable sleeve is provided with a limiting ring, and a sleeve covering the limiting ring and a part of the cable sleeve is sleeved outside the limiting ring, so that the limiting spring is limited between an end face of the sleeve and an end face of the semi-arc limiting convex ring. An inner cavity of the front sleeve is formed by jointing four separate chambers, wh