CN111580221A - Single-core optical fiber socket - Google Patents

Abstract

The invention discloses a single-core optical fiber socket which solves the problems that an existing single-core optical fiber socket does not have a quick plugging function, an optical fiber contact body cannot be detached, and the insertion loss and return loss of optical signals are large. The single-core optical fiber socket comprises a socket shell (14), a front needle insulator (15), a front needle gasket (16), a large spring B (17), a rear needle gasket (18), a rear needle insulator (19), a clamp spring B (20) and a phi 2.5 optical fiber pin B (21). The design of the single-core optical fiber socket structurally ensures the contact length when the single-core optical fiber socket is butted with a plug, and realizes the disassembly function of an optical fiber contact pin while ensuring the butting length.

Description

Single-core optical fiber socket

Technical Field

The invention belongs to the technical field of optical fiber connectors, and particularly provides a single-core optical fiber socket. The method is applied to the fields of high-speed data transmission systems such as optical fiber communication, photoelectric information conversion, ships, weapons, aerospace and the like.

Background

At present, the conventional single-core circular optical fiber connector socket generally adopts common threaded connection or bayonet connection when being butted with a plug, does not have a quick plugging function, and is easily subjected to the condition of butt joint dislocation in the butt joint process with the plug to influence the transmission of optical signals. Meanwhile, the existing optical fiber contact element generally adopts a clamping claw fixing mode, and the problems of high insertion loss and return loss of optical signals are also solved during butt joint. Therefore, in order to realize the quick plug of the socket and complete transmission of optical signals, and simultaneously have the detachable function of the optical fiber contact body, a novel optical fiber socket needs to be developed, and no such products exist at home and abroad.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a single core fiber optic receptacle. This single core fiber socket can realize quick plug with the plug, and phi 2.5 fiber insertion needle can be dismantled, and phi 2.5 fiber insertion needle can guarantee contact length.

In order to achieve the purpose, the invention adopts the following technical scheme:

a single-core optical fiber socket comprises a socket shell (14), a front needle insulator (15), a front needle gasket (16), a large spring B (17), a rear needle gasket (18), a rear needle insulator (19), a clamp spring B (20) and a phi 2.5 optical fiber inserting needle B (21), wherein the front needle insulator (15) and the rear needle insulator (19) are fixed in an inner cavity of the socket shell (14) through the clamp spring B (20), the front needle gasket (16) is arranged in the front needle insulator (15), the rear needle gasket (18) is arranged in the rear needle insulator (19), the phi 2.5 optical fiber inserting needle B (21) is axially arranged in the front needle insulator (15) and the rear needle insulator (19), the front needle gasket (16) and the rear needle gasket (18) are sleeved on the periphery of the phi 2.5 optical fiber inserting needle B (21), the large spring B (17) is sleeved on the periphery of the phi 2.5 optical fiber inserting needle B (21), and the large spring B (17) is arranged between the front needle gasket (16) and the rear needle gasket (18), and limiting the phi 2.5 optical fiber pin B (21).

Furthermore, the outer peripheral surface of the socket shell (14) is provided with an arc surface groove (1-1).

Further, a square disc washer (22) is mounted on a front end face of the square disc body of the socket housing (14).

Furthermore, 5 positioning keys are arranged on the peripheral surface of the socket shell (14) along the circumference, and comprise 1 concave positioning key (14-2), 2 rectangular positioning keys A (14-3) positioned at two sides of the concave positioning key (14-2), and 2 arc positioning keys A (14-4) positioned below the rectangular positioning keys A.

Furthermore, the needle front insulator (15) comprises a second cylinder body (15-1), a first step-shaped inner hole (15-2) is formed in the second cylinder body (15-1), and 1 third rectangular positioning groove (15-3) and 4 third arc-shaped positioning keys (15-4) are formed in the periphery of the second cylinder body (15-1) along the circumferential direction;

gasket (16) before the needle is the hollow cylinder shape that the periphery has the ladder face, and gasket (16) before the needle is arranged in first ladder type hole (15-2), and the ladder face cooperatees with first ladder type hole (15-2) and preceding gasket (16) of needle and insulator (15) axial spacing before the needle.

Furthermore, the insulator (19) is a hollow cylinder, a first annular boss (23) is arranged on the inner periphery of the tail end of the hollow cylinder, rectangular openings (23-1) are symmetrically arranged on the inner side of the first annular boss (23), 2 rectangular grooves (23-2) are symmetrically arranged on the front end face of the first annular boss (23), the 2 rectangular grooves (23-2) are perpendicular to the rectangular openings (23-1), and 1 second rectangular positioning groove (23-3) and 4 second arc-shaped positioning keys (23-4) are arranged on the periphery of the hollow cylinder along the circumferential direction.

Further, the cross section of the large spring B (17) is square.

Further, the phi 2.5 optical fiber inserting needle B (21) comprises a phi 2.5 standard inserting core (24), a small spring (25), a front shell (26), a rear shell (27) and a crimping sleeve (28); the periphery of the phi 2.5 standard ferrule (24) is sleeved with a small spring (25), the front shell (26) and the rear shell (27) are connected through threads, the tail end of the front shell (26) is provided with a closing structure, the phi 2.5 standard ferrule (24) and the small spring (25) are axially limited and fixed in the rear shell (27), the periphery of the tail end of the rear shell (27) is provided with a crimping sleeve (28), and the periphery of the rear shell (27) is provided with a first outwards-protruding rectangular positioning key (27-1-2).

Compared with the prior art, the invention has the following beneficial effects: the optical fiber contact pin of the single-core optical fiber socket is structurally designed, so that the contact length is ensured when the optical fiber contact pin is butted with a plug, and the disassembly function of the optical fiber contact pin is realized while the butting length is ensured. The insulator adopts the design of many keyway, the better axiality that has improved the product, and the design of socket shell is more unique, has designed five kinds of different protruding strong, prevents that the product from butt joint misplugging, has designed the square plate packing ring at the socket flange dish, has played dustproof effect, consequently, the product has realized the transmission of light signal on the basis that satisfies the performance requirement, compromises factors such as outward appearance, weight, cost of maintenance, and ensures its technology rationality, has reduced product cost.

Drawings

FIG. 1 is a schematic diagram of a fiber optic receptacle according to the present invention;

FIG. 2 is a schematic diagram of the external structure of the fiber optic receptacle of the present invention;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a schematic view of the structure of the insulator before the needle;

FIG. 5 is a right side view of FIG. 2;

FIG. 6 is a schematic view of the structure of the post-needle insulator or post-hole insulator;

FIG. 7 is a right side view of FIG. 6;

FIG. 8 is a left side view of FIG. 6;

FIG. 9 is a schematic structural diagram of a Φ 2.5 optical fiber stub A or a Φ 2.5 optical fiber stub B;

FIG. 10 is a right side view of FIG. 9;

FIG. 11 is a schematic view of the half-section of FIG. 9;

FIG. 12 is a schematic structural diagram of a Φ 2.5 standard ferrule;

FIG. 13 is a schematic view of a plug configuration for mating with the receptacle of the present invention;

FIG. 14 is an external structural view of the plug housing;

FIG. 15 is a schematic view of the coupling nut;

FIG. 16 is a right side view of FIG. 15;

FIG. 17 is a schematic view of the structure of the pre-hole insulator of the plug;

FIG. 18 is a schematic view of the receptacle of the present invention mated with a plug;

in the figure: 1-a plug housing assembly; 1-1-a plug housing; 1-1-1-holding tank; 1-1-2-steel ball; 1-1-3-via; 1-1-4-strip-shaped grooves; 1-1-5-mounting groove; 1-1-6-locking spring plate; 1-2-connecting nuts; 1-2-1-a limiting groove; 1-2-2-first locking groove; 1-2-3-a second locking groove;

2-a pre-hole insulator; 2-1-a first cylindrical body; 2-1-1-a first circular inner bore; 2-1-2-first step type inner hole; 2-1-3-a first rectangular positioning slot; 2-1-4-a first arc positioning key;

3-a metal sleeve; 3-1-a hollow cylindrical sleeve body; 3-2-closing up the torus; 3-3-a second annular boss;

4-a ceramic bushing; 5-sealing ring;

6-hole front gasket; 6-1-a hollow cylindrical body; 6-2-first torus;

7-hole rear insulator; 8-big spring A; 9-hole rear gasket; 10-clamp spring A; 11-phi 2.5 optical fiber pin A; 12-an arc-shaped elastic gasket; 13-a ball bearing;

14-a socket housing; 14-1-cambered surface groove; 14-2- "concave" character type positioning key; 14-3-rectangular alignment key a; 14-4-arc alignment key a;

15-needle front insulator; 15-1-a second cylindrical body; 15-2-first stepped bore; 15-3-a third rectangular positioning slot; 15-4-a third arc alignment key;

16-needle front gasket; 17-big spring B; 18-needle back pad; 19-needle rear insulator; 20-clamp spring B; a 21-phi 2.5 optical fiber pin B; 22-square disc washer;

23-a first annular boss; 23-1-rectangular opening; 23-2-rectangular grooves; 23-3-a second rectangular positioning slot; 23-4-a second arced alignment key;

24-phi 2.5 standard ferrule; 24-1-phi 2.5 ceramic ferrule; 24-2-metal holder; 24-2-1-second stepped inner bore; 24-2-2-boss structure; 25-small spring;

26-a front housing; 26-1-a first hollow cylindrical body; 26-1-1-internal threads; 26-2-circular ring-shaped closing-up structure;

27-a rear housing; 27-1-a second hollow cylindrical body; 27-1-1-external threads; 27-1-2-a first rectangular alignment key; 27-1-3-stepped inner holes; 27-1-4-annular groove; 28-crimp sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, a single-core optical fiber receptacle includes a receptacle housing 14, a front pin insulator 15, a front pin pad 16, a large spring B17, a rear pin pad 18, a rear pin insulator 19, a snap spring B20, and a Φ 2.5 optical fiber pin B21, wherein the front pin insulator 15 and the rear pin insulator 19 are fixed in an inner cavity of the receptacle housing 14 by the snap spring B20, the front pin pad 16 is disposed in the front pin insulator 15, the rear pin pad 18 is disposed in the rear pin insulator 19, the Φ 2.5 optical fiber pin B21 is axially disposed in the front pin insulator 15 and the rear pin insulator 19, the front pin pad 16 and the rear pin pad 18 are sleeved on an outer periphery of a Φ 2.5 optical fiber pin B21, the large spring B17 is sleeved on an outer periphery of a Φ 2.5 optical fiber pin B21, the large spring B17 is disposed between the front pin pad 16 and the rear pin pad 18, and the Φ 2.5 optical fiber pin B21 is limited.

The outer peripheral surface of the socket shell 14 is provided with an arc surface groove 14-1 used for being matched with the steel ball 1-1-2.

A square disc washer 22 is mounted on the end face of the square disc of the socket housing 14.

Referring to fig. 3, 5 positioning keys are circumferentially arranged on the outer peripheral surface of the socket housing 14, and include 1 concave positioning key 14-2, 2 rectangular positioning keys a14-3 located at both sides of the concave positioning key 14-2, and 2 arc positioning keys a14-4 located below the rectangular positioning keys a 14-3.

Referring to fig. 4-5, the pre-needle insulator 15 includes a second cylindrical body 15-1, a first stepped inner hole 15-2 is formed in the second cylindrical body 15-1, and 1 third rectangular positioning groove 15-3 and 4 third arc-shaped positioning keys 15-4 are formed on the outer circumference of the second cylindrical body 15-1 along the circumferential direction;

the needle front gasket 16 is in the shape of a hollow cylinder with a step surface at the periphery, the needle front gasket 16 is arranged in the first step-shaped inner hole 15-2, and the step surface is matched with the first step-shaped inner hole 15-2 to axially limit the needle front gasket 16 and the needle front insulator 15.

Referring to fig. 6 to 8, the rear insulator 19 is a hollow cylinder, a first annular boss 23 is disposed on the inner periphery of the rear end of the hollow cylinder, rectangular openings 23-1 are symmetrically disposed on the inner side of the first annular boss 23, 2 rectangular grooves 23-2 are symmetrically disposed on the front end surface of the first annular boss 23, the 2 rectangular grooves 23-2 are perpendicular to the rectangular openings 23-1, and 1 second rectangular positioning groove 23-3 and 4 second arc-shaped positioning keys 23-4 are disposed on the outer periphery of the hollow cylinder along the circumferential direction.

The third rectangular positioning groove 15-3 of the front needle insulator 15 corresponds to the second rectangular positioning groove 23-3 of the rear needle insulator 19 in position, the 4 third arc-shaped positioning keys 15-4 correspond to the 4 second arc-shaped positioning keys 23-4 in position respectively, positioning keys matched with the third rectangular positioning groove 15-3 and the second rectangular positioning groove 23-3 and positioning grooves matched with the 4 third arc-shaped positioning keys 15-4 and the 4 second arc-shaped positioning keys 23-4 are arranged on the inner circumferential surface of the socket shell 14, so that the front needle insulator 15 and the rear needle insulator 7 are accurately positioned, and the limitation with the socket shell 14 is guaranteed.

The cross section of the large spring B20 is square.

Referring to fig. 9-11, Φ 2.5 fiber stub B21 includes Φ 2.5 standard ferrule 24, small spring 25, front housing 26, rear housing 27, and crimp sleeve 28; the periphery of the phi 2.5 standard ferrule 24 is sleeved with a small spring 25, the front shell 26 and the rear shell 27 are connected through threads, the tail end of the front shell 26 is provided with a closing structure, the phi 2.5 standard ferrule 24 and the small spring 25 are axially limited and fixed in the rear shell 27, the periphery of the tail end of the rear shell 27 is provided with a crimping sleeve 28, the periphery of the rear shell 27 is provided with a first rectangular positioning key 27-1-2 protruding outwards, the first rectangular positioning key 27-1-2 is matched with the rectangular opening 23-1 and can be inserted into the rectangular opening 23-1, the periphery of the tail end of the rear shell 27 is provided with a plurality of annular grooves 27-1-4, and when a wire is crimped between the rear shell 27 and the crimping sleeve 28, the wire can be fixed in an enhanced.

Referring to fig. 12, the standard ferrule 24 with the diameter of 2.5 includes a ferrule 24-1 with the diameter of 2.5 and a metal holder 24-2 integrally formed by a mold, the metal holder 24-2 includes a metal holder body, a second stepped inner hole 24-2-1 is formed in the inner periphery of the metal holder body, a boss structure 24-2-2 is arranged at the front end of the outer periphery, the tail end of the ferrule 24-1 with the diameter of 2.5 is arranged in a larger-diameter hole of the second stepped inner hole 24-2-1, and a small spring 25 is sleeved on the outer periphery of the metal holder body and one end of the small spring abuts against the flat end face of the boss structure 24-2-2. In the butt joint process of the phi 2.5 optical fiber inserting needle A11 and the phi 2.5 optical fiber inserting needle B21, the phi 2.5 ceramic inserting core 24-1 is stressed, the boss structure 24-2-2 of the metal support 24-2 presses the reducing spring 25 backwards, the phi 2.5 ceramic inserting core 24-1 is driven to retreat by the elastic force, and a certain contact pressure is ensured.

The front housing 26 includes a first hollow cylinder 26-1, a terminal of the first hollow cylinder 26-1 extends inward along a circumference to form a circular ring-shaped closing-in structure 26-2, and an inner circumference of the first hollow cylinder 26-1 is provided with an inner thread 26-1-1.

The rear shell 27 comprises a second hollow cylinder body 27-1, an external thread 27-1-1 is arranged on the periphery of the tail end of the second hollow cylinder body 27-1, the first rectangular positioning key 27-1-2 is located at the front end of the external thread 27-1-1, a stepped inner hole 27-1-3 is formed in the second hollow cylinder body 27-1, and the stepped surface of the stepped inner hole 27-1-3 is used for limiting when the small spring 25 stretches.

Φ 2.5 fiber stub A11 Assembly: firstly, installing a phi 2.5 standard ferrule 24, specifically, integrally molding and fixing a phi 2.5 ceramic ferrule 24-1 and a metal support 24-2 through a mold, then sleeving a small spring 11-2 on the periphery of the metal support 24-2, and abutting one end of the small spring against the flat end face of a boss structure 24-2-2; then the tail end of the phi 2.5 ceramic ferrule 24-1 penetrates out of the annular closing-in structure 26-2 of the front shell 26, the tail end face of the boss structure of the metal support 24-2 abuts against the inner end face of the annular closing-in structure 26-2, and the front shell 26 and the rear shell 27 are fixed through matching connection of the internal thread 26-1-1 and the external thread 27-1-1, so that the front end of the phi 2.5 standard ferrule 24 and the small spring 11-2 are placed in an inner hole with a larger diameter in the stepped inner hole 11-4-1-5 of the rear shell 27. The crimping sleeve 28 is used for placing the wire sheath of the wire between the outer periphery of the front end of the rear shell 27 and the inner periphery of the crimping sleeve 28 when the optical fiber contact body is connected with the wire, and then the rear shell 27, the wire sheath and the crimping sleeve 11-5 are fixed in an interference crimping mode through crimping pliers.

Assembling the plug: firstly, a first rectangular positioning key 27-1-2 of a phi 2.5 optical fiber inserting needle A11 corresponds to a rectangular opening 23-1 of a hole rear insulator 7, a front shell of the phi 2.5 optical fiber inserting needle A11 and the first rectangular positioning key 27-1-2 penetrate through the first annular boss 23 of the hole rear insulator 7, then the phi 2.5 optical fiber inserting needle A1190 degree is rotated to enable the first rectangular positioning key 27-1-2 to fall into a rectangular groove 23-2 on the front end face of the first annular boss 23 for fixation, then a hole rear gasket 9, a large spring A8, a hole front gasket 6, a ceramic sleeve 4, a metal sleeve 3 and a hole front insulator 2 are sequentially arranged to realize the fixation of the phi 2.5 optical fiber inserting needle A11, then the hole rear insulator 7 and the hole front insulator 2 are fixed in a plug shell 1-1 through a clamp spring A10, and CGSZ33-A1 sealing glue is adopted near a clamp spring A10 for encapsulation treatment, the airtightness of the connector itself is ensured and then a coupling nut 1-2 is mounted on the outside of the plug housing 1-1.

Assembling the socket: firstly, a rectangular positioning key B9-4-3 of a phi 2.5 optical fiber inserting needle 9 corresponds to a rectangular opening 7-1-1 of a needle rear insulator 7, a front shell 9-3 and a rectangular positioning key B9-4-3 of the phi 2.5 optical fiber inserting needle 9 penetrate through a first annular boss 7-1 of the needle rear insulator 7, then the phi 2.5 optical fiber inserting needle is rotated by 990 degrees to enable the rectangular positioning key B9-4-3 to fall into a rectangular groove 7-1-2 on the front end face of the first annular boss 7-1 for fixation, then a needle rear gasket 5, a large spring 4, a needle front gasket 3 and a needle front insulator 15 are sequentially arranged to realize the fixation of the phi 2.5 optical fiber inserting needle 9, then the needle rear insulator 7 and the needle front insulator 15 are fixed in a socket shell 1-1 through a clamp spring 8, and CGSZ33-A1 glue is adopted at the encapsulating position where the clamp spring 8 is arranged for encapsulating treatment, the air tightness of the socket is ensured.

Referring to fig. 13-15, a plug configuration for mating with a receptacle of the present invention: the plug comprises a plug shell component 1, a hole front insulator 2, a metal sleeve 3, a ceramic sleeve 4, a sealing ring 5, a hole front gasket 6, a hole rear insulator 7, a large spring A8, a hole rear gasket 9, a clamp spring A10, a phi 2.5 optical fiber contact pin A11, an arc-shaped elastic gasket 12 and a ball 13;

the plug shell component 1 comprises a plug shell 1-1 and a connecting nut 1-2, the connecting nut 1-2 is arranged on the periphery of the plug shell 1-1, a plurality of accommodating grooves 1-1-1 are formed in the front end of the plug shell 1-1 along the circumferential direction, a steel ball 1-1-2 is arranged in each accommodating groove 1-1-1, a through hole 1-1-3 is formed in the plug shell 1-1, a ball 13 is arranged in each through hole 1-1-3, strip-shaped grooves 1-1-4 for accommodating arc-shaped elastic gaskets 12 are formed in the outer peripheral surface of the plug shell 1-1 along the axial direction of the through hole 1-1-3 to the two sides of the plug shell 1-1, the arc-shaped elastic gaskets 12 are arranged in the strip-shaped grooves 1-1-4 and are positioned between the plug shell 1-1 and the connecting nut 1-, the bottommost part of the arc-shaped elastic gasket 12 is contacted with the ball 13 to provide radial elasticity for the ball 13, the insulator 2 before the hole and the insulator 7 after the hole are fixed in the plug shell 1-1 through a snap spring A10, a phi 2.5 optical fiber contact pin A11 is axially arranged in the insulator 2 before the hole and the insulator 7 after the hole, a metal sleeve 3 and a ceramic sleeve 4 are sequentially arranged between the inner periphery of the front end of the hole front insulator 2 and the outer periphery of the phi 2.5 optical fiber contact pin A11, a hole front gasket 6 is arranged in the tail end of the hole front insulator 2, a hole rear gasket 9 is arranged in the hole rear insulator 7, a large spring A8 is arranged between the hole front gasket 6 and the hole rear gasket 9, the large spring A8 is sleeved on the periphery of the phi 2.5 optical fiber pin A11 to limit the phi 2.5 optical fiber pin A11, a sealing ring 5 is further arranged on a butt joint surface in butt joint with the socket in the plug shell 1-1, and the sealing ring 5 is sleeved on the periphery of the hole front insulator 7;

the plug comprises a plug shell 1-1 and is characterized in that a positioning groove 1-1-5 is further formed in the plug shell 1-1-5, a locking elastic sheet 1-1-6 is installed in the positioning groove 1-1-5, a first locking groove 1-2-2 and a second locking groove 1-2-3 which are used for being matched with the locking elastic sheet 1-1-6 are formed in the inner periphery of a connecting nut 1-2, when the plug is not butted with the socket, the locking elastic sheet 1-1-6 is placed in the first locking groove 1-2-2, when the plug and the socket are in place, the connecting nut 1-2 is rotated to drive the locking elastic sheet 1-1-6 to move and fall into the second locking groove 1-2-3, and axial locking of the plug shell 1-1 and the socket shell 1 is achieved.

The plug shell 1 is provided with positioning groove structures which are respectively matched with the concave positioning keys 14-2, the 2 rectangular positioning keys A14-3 and the 2 arc positioning keys A14-4, and when the plug is in butt joint with the socket, the five keys are respectively in butt joint in a matching mode, so that the misplug prevention effect is achieved.

Referring to fig. 17, the pre-hole insulator 2 includes a first cylindrical body 2-1, a first circular inner hole 2-1-1 and a first stepped inner hole 2-1-2 are sequentially axially provided in the first cylindrical body 2-1 from a front end to a rear end, and 1 first rectangular positioning groove 2-1-3 and 4 first arc-shaped positioning keys 2-1-4 are provided on an outer circumference of the first cylindrical body 2-1 in a circumferential direction.

The metal sleeve 3 comprises a hollow cylindrical sleeve body 3-1, the front end of the hollow cylindrical sleeve body 3-1 is provided with a ring body closing-in 3-2 extending towards the inner periphery, the tail end of the hollow cylindrical sleeve body is provided with a second annular boss 3-3 extending towards the outer periphery, and the hollow cylindrical sleeve body 3-1 is axially arranged in the first circular inner hole 2-1-1;

the hole front gasket 6 comprises a hollow cylinder body 6-1, the front end of the hollow cylinder body 6-1 extends inwards along the circumference to form a first annular body 6-2, the peripheral surface of the hollow cylinder body 6-1 is in a stepped shape matched with the first stepped inner hole 2-1-2, and the hollow cylinder body 6-1 is axially arranged in the first stepped inner hole 2-1-2 of the hole front insulator 2 and is fixed through the matching of a stepped surface;

the second annular boss 3-3 of the metal sleeve 3 is arranged between the front end face of the first stepped inner hole 2-1-2 of the hole front insulator 2 and the front end face of the first annular body 6-2 of the hole front gasket 6.

The ceramic bushing 4 is of a hollow cylindrical structure. The ceramic sleeve 4 is axially arranged in the metal sleeve 3, and two ends of the ceramic sleeve 4 are respectively abutted between the inner side of the ring body closing-in 3-2 and the first ring body 6-2 of the hole front gasket 6 for fixation.

The metal sleeve 3 is additionally arranged on the ceramic sleeve 4, so that the ceramic sleeve 4 can be better prevented from being broken, the front end of the ceramic sleeve 4 is provided with a ring body closing-in 3-2, and a guiding butt joint effect is realized on a phi 2.5 optical fiber contact pin B21 when the plug is in butt joint with the socket.

The post-hole insulator 7 and the post-pin insulator 19 are identical in structure.

The phi 2.5 optical fiber pin A11 and the phi 2.5 optical fiber pin B21 have the same structure.

Referring to fig. 18, the mating process of the plug and the socket: the butt joint end of the socket shell 14 is axially inserted into the plug shell 1-1 and slides to approach through the ball 13, meanwhile, the front end of the phi 2.5 optical fiber pin B21 is inserted into the metal sleeve 3 and the ceramic sleeve 4 and contacts with the phi 2.5 optical fiber pin A11 in a surface-to-surface mode to realize signal transmission, when the butt joint is in place, the arc-shaped elastic gasket 12 pops out for limiting, and the ceramic sleeve 4 ensures the accurate butt joint of the phi 2.5 optical fiber pin A11 and the phi 2.5 optical fiber pin B21 and fixes the butt joint state. The plug and the socket contact are designed by adopting the same special structure, so that elastic butt joint can be realized, and the product can be detached when being used in a connector, thereby facilitating the subsequent maintenance of the product. When in butt joint, the small springs 25 in the phi 2.5 optical fiber pin A11 and the phi 2.5 optical fiber pin B21 are compressed at the same time, the generated elastic force drives the phi 2.5 ceramic ferrule 24-1 to retreat, and certain contact pressure is ensured until the connector socket and the plug are in butt joint in place.

The Φ 2.5 fiber stub a11 is the same as Φ 2.5 fiber stub B21, and the procedure for retrieving Φ 2.5 fiber stub a11 is described as follows: the phi 2.5 optical fiber pin A11 is limited in the plug housing 1-1 by the hole rear insulation 7, the big spring A8, the hole rear gasket 9 and the hole front gasket 6, the assembled state is that the big spring A8 is in a compressed state, when the contact body is to be taken out, a tool is used for applying pressure inwards at the crimping sleeve 28 at the tail end of the phi 2.5 optical fiber pin A11 and rotating 90 degrees, so that the two first rectangular positioning keys 27-1-2 on the rear housing 27 of the phi 2.5 optical fiber pin A11 fall into the two rectangular openings 23-1 of the hole rear insulation body 7, and further applying pulling force outwards to take out the phi 2.5 optical fiber pin A11.

The phi 2.5 optical fiber contact pin B adopted in the socket is used in HY series circular products, is different from a standard 38999 series internal optical fiber contact body, meets the general phi 2.5 ferrule standard, adopts the same special structural design for the plug and the socket contact body, can realize elastic butt joint, can be disassembled when being used in a connector, and is convenient for subsequent maintenance of the product. When in butt joint, the small spring inside the phi 2.5 optical fiber pin B is compressed, the generated elastic force promotes the phi 2.5 ceramic ferrule to retreat, and a certain contact pressure is ensured until the connector socket and the plug are in butt joint in place, the double springs in the two optical fiber pins act, the end surface contact insertion loss after butt joint is greatly reduced, the loss of the similar product in the prior art is about 2dB, and the loss of the product can be reduced to 0.3dB after the structure improvement. These are not comparable to other common fiber optic contacts.

The phi 2.5 standard insertion core is more convenient in butt joint test and product replacement, and can be butted with movable plugs of the phi 2.5 standard insertion core, such as an FC optical fiber movable plug, an SC optical fiber movable plug, an ST optical fiber movable plug and the like.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (8)

1. A single-core optical fiber socket is characterized by comprising a socket shell (14), a front needle insulator (15), a front needle gasket (16), a large spring B (17), a rear needle gasket (18), a rear needle insulator (19), a clamp spring B (20) and a phi 2.5 optical fiber pin B (21), wherein the front needle insulator (15) and the rear needle insulator (19) are fixed in an inner cavity of the socket shell (14) through the clamp spring B (20), the front needle gasket (16) is arranged in the front needle insulator (15), the rear needle gasket (18) is arranged in the rear needle insulator (19), the phi 2.5 optical fiber pin B (21) is axially arranged in the front needle insulator (15) and the rear needle insulator (19), the front needle gasket (16) and the rear needle gasket (18) are sleeved on the periphery of the phi 2.5 optical fiber pin B (21), and the large spring B (17) is sleeved on the periphery of the phi 2.5 optical fiber pin B (21), the big spring B (17) is arranged between the pin front gasket (16) and the pin rear gasket (18) to limit the phi 2.5 optical fiber inserting pin B (21).

2. A single core fiber optic receptacle according to claim 1, wherein said receptacle housing (14) is provided with an arcuate groove (1-1) on its outer peripheral surface.

3. A single core fiber optic receptacle according to claim 1, wherein a square plate washer (22) is mounted on the end face of the square plate of the receptacle housing (14).

4. A single core fiber optic receptacle according to claim 1, wherein there are 5 alignment keys circumferentially disposed on the outer peripheral surface of the receptacle housing (14), including 1 "concave" alignment key (14-2), 2 rectangular alignment keys a (14-3) disposed on both sides of the "concave" alignment key (14-2), and 2 arc alignment keys a (14-4) disposed under the rectangular alignment keys a.

5. A single core fiber optic receptacle according to claim 1, wherein the pre-pin insulator (15) comprises a second cylindrical body (15-1), a first stepped bore (15-2) is provided in the second cylindrical body (15-1), and 1 third rectangular positioning groove (15-3) and 4 third arc positioning keys (15-4) are provided on the outer circumference of the second cylindrical body (15-1) in the circumferential direction;

gasket (16) before the needle is the hollow cylinder shape that the periphery has the ladder face, and gasket (16) before the needle is arranged in first ladder type hole (15-2), and the ladder face cooperatees with first ladder type hole (15-2) and preceding gasket (16) of needle and insulator (15) axial spacing before the needle.

6. A single core fiber optic receptacle according to claim 1, wherein the rear insulator (19) is a hollow cylindrical body, a first annular projection (23) is provided on an inner circumference of a distal end of the hollow cylindrical body, and rectangular openings (23-1) are symmetrically provided inside the first annular projection (23), and 2 rectangular recesses (23-2) are symmetrically provided on a front end surface of the first annular projection (23), the 2 rectangular recesses (23-2) are respectively perpendicular to the rectangular openings (23-1), and 1 second rectangular positioning groove (23-3) and 4 second arc positioning keys (23-4) are provided on an outer circumference of the hollow cylindrical body in a circumferential direction.

7. A single core fiber optic receptacle according to claim 1, wherein said large spring B (17) is square in cross-section.

8. A single core fiber optic receptacle according to claim 1, wherein said Φ 2.5 fiber stub B (21) comprises a Φ 2.5 standard ferrule (24), a small spring (25), a front housing (26), a rear housing (27), and a crimp sleeve (28); the periphery of the phi 2.5 standard ferrule (24) is sleeved with a small spring (25), the front shell (26) and the rear shell (27) are connected through threads, the tail end of the front shell (26) is provided with a closing structure, the phi 2.5 standard ferrule (24) and the small spring (25) are axially limited and fixed in the rear shell (27), the periphery of the tail end of the rear shell (27) is provided with a crimping sleeve (28), and the periphery of the rear shell (27) is provided with a first outwards-protruding rectangular positioning key (27-1-2).

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