CN212483917U

CN212483917U - Single-core optical fiber connector capable of being plugged and pulled quickly

Info

Publication number: CN212483917U
Application number: CN202021132555.9U
Authority: CN
Inventors: 徐晓龙; 陶然
Original assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Current assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-02-05
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a quick plug single core fiber connector has solved the fiber connector among the prior art and does not possess quick plug function, and still has the big problem of insertion loss and return loss of optical signal during the butt joint. The utility model discloses a quick plug single core fiber connector includes plug and socket that butt joint each other, the plug includes plug housing subassembly, hole front insulator, metal sleeve, ceramic bushing, sealing washer, hole front gasket, hole back insulator, big spring A, hole back gasket, jump ring A, phi 2.5 optic fibre contact pin A, arc elastic gasket, ball; the socket comprises a socket shell, a pin front insulator, a pin front gasket, a large spring B, a pin rear gasket, a pin rear insulator, a clamp spring B and a phi 2.5 optical fiber contact pin B. The utility model discloses can realize the optical signal transmission between the circular connector, the contact has possessed simultaneously can dismantle the function, makes things convenient for follow-up product maintenance, has reduced product cost, has increased product life.

Description

Single-core optical fiber connector capable of being plugged and pulled quickly

Technical Field

The utility model belongs to the technical field of fiber connector, a quick plug single core fiber connector is provided very much. 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 existing single-core circular optical fiber connector generally adopts common threaded connection or bayonet connection, does not have a quick plugging function, and the optical fiber plug is easy to have the condition of butt joint dislocation in the butt joint process with a socket, so that the transmission of optical signals is influenced. 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.

Consequently, in order to realize the circular quick plug fiber connector's of single core design to realize optical signal's complete transmission, possess the detachable function of optic fibre contact simultaneously, need develop a novel fiber connector, do not have this kind of product at present at home and abroad.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a quick plug single core fiber connector. The optical fiber connector can realize quick plugging, the adopted optical fiber contact member can be disassembled, and the optical fiber contact pin adopts a double-spring butt joint structure, so that the insertion loss and return loss of optical signals can be reduced, and finally, the complete transmission of the signals is realized.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a quick-plugging single-core optical fiber connector comprises a plug and a socket which are mutually butted, wherein the plug comprises a plug shell assembly (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 A (8), a hole rear gasket (9), a clamp spring A (10), a phi 2.5 optical fiber contact pin A (11), an arc 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 installed 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 installed in each accommodating groove (1-1-1), in addition, through holes (1-1-3) are formed in the plug shell (1-1-1), balls (13) are arranged in the through holes (1-1-3), strip-shaped grooves (1-1-4) for placing arc-shaped elastic gaskets (12) are formed in the peripheral surface of the plug shell (1-1) along the axial direction to the two sides of the through holes (1-1-3), the arc-shaped elastic gasket (12) is arranged in the strip-shaped groove (1-1-4) and is positioned between the plug shell (1-1) and the limiting groove (1-2-1) of the connecting nut (1-2), the hole front insulator (2) and the hole rear insulator (7) are fixed in the plug shell (1-1) through a clamp spring A (10), a phi 2.5 optical fiber pin A (11) is axially arranged in the hole front insulator (2) and the hole rear insulator (7), 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 pin A (11), 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 A (8) is arranged between the hole front gasket (6) and the hole rear gasket (9), the large spring A (8) is sleeved on the periphery of the phi 2.5 optical fiber pin A (11) to limit the phi 2.5 optical fiber pin A (11), 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 pre-hole insulator (2);

the 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), limiting a phi 2.5 optical fiber inserting needle B (21); 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);

when the plug is butted with the socket, the butt joint end of the socket shell (14) is axially inserted into the plug shell (1-1) and is in sliding approach through the ball (13), when the butt joint is in place, the steel ball (1-1-2) falls into the arc groove (14-1), the ball (13) upwards jacks up the arc elastic gasket (12), the arc elastic gasket (12) is separated from the limit of the strip groove (1-1-4) of the plug shell (1-1), the connecting nut (1-2) can realize circumferential rotation relative to the plug shell (1-1), meanwhile, the front end of the phi 2.5 optical fiber pin B (21) is inserted into the metal sleeve (3) and the ceramic sleeve (4) and is in surface-surface contact with the phi 2.5 optical fiber pin A (11) to realize signal transmission, the ceramic sleeve (4) ensures the accurate butt joint of the phi 2.5 optical fiber pin A (11) and the phi 2.5 optical fiber B (21), and the butt joint state is fixed, and the air tightness after butt joint is ensured by the sealing ring (5).

Furthermore, the plug shell (1-1) is also provided with a mounting groove (1-1-5), a locking elastic sheet (1-1-6) is mounted in the mounting 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 arranged on the inner periphery of the connecting nut (1-2), when the plug is not butted with the socket, the locking elastic sheet (1-1-6) is arranged 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), the axial locking of the plug shell (1-1) and the socket shell (14) is realized.

Furthermore, a square disc gasket (22) is mounted on the end face of the square disc body of the socket shell (14), 5 positioning keys are arranged on the peripheral face of the socket shell along the circumference, the positioning keys comprise 1 concave positioning key (14-2), 2 rectangular positioning keys A (14-3) located on two sides of the concave positioning key (14-2) and 2 arc positioning keys A (14-4) located below the rectangular positioning keys A, and positioning grooves respectively matched with the concave positioning key (14-2), the 2 rectangular positioning keys A (14-3) and the 2 arc positioning keys A (14-4) are formed in the plug shell (1-1).

Further, insulator (2) before hole includes first cylinder body (2-1), is equipped with first circular hole (2-1-1) and notch cuttype hole (2-1-2) along the axial in proper order from the front end to the rear end in first cylinder body (2-1), and is equipped with 1 first rectangle constant head tank (2-1-3) and 4 first arc positioning key (2-1-4) along the circumferencial direction on first cylinder body's (2-1) periphery.

Further, the insulator (7) behind the hole and the insulator (19) behind the needle have the same structure and are both hollow cylinders, a first annular boss (23) is arranged on the inner periphery of the tail end of each hollow cylinder, rectangular openings (23-1) which are symmetrically arranged are formed in the inner side of the first annular boss (23), 2 rectangular grooves (23-2) which are symmetrically arranged are formed in 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 formed in the periphery of each hollow cylinder along the circumferential direction.

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 phi 2.5 optical fiber inserting needle A (11) and the phi 2.5 optical fiber inserting needle B (21) have the same structure and respectively comprise a phi 2.5 standard ferrule (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 utility model discloses following beneficial effect has: the utility model discloses an optical fiber connector possesses quick plug function, and the optical fiber contact body of plug and socket is the same kind of structure, and the contact length of optical fiber contact pin has structurally been guaranteed through the design of the double spring in phi 2.5 optical fiber contact pin A and the phi 2.5 optical fiber contact pin B, and in the time of guaranteeing butt joint length, the plug and the socket pass through the structural design of insulator, optical fiber contact pin and big spring and have realized optical fiber contact pin's dismantlement function moreover. The insulator adopts the design of many keyway, the better axiality of having improved the product, and the plug casing unique design five kinds of different protruding keys prevent that the product from butt joint misplugging from, adds the metal sleeve at ceramic sleeve, and better assurance ceramic sleeve is not cracked to play the guide butt joint effect. Therefore, on the basis of meeting the performance requirements, the product realizes the transmission of optical signals, gives consideration to factors such as appearance, weight, maintenance cost and the like, ensures the process reasonability and reduces the product cost.

The utility model discloses a quick plug single core fiber connector of quick plug can realize the optical signal transmission between the circular connector, the contact has possessed simultaneously can dismantle the function, make things convenient for follow-up product maintenance, the product cost is reduced, product life has been increased, the successful development of this product, make quick plug fiber connector promote by a large scale, the high frequency band of signal has been realized, high capacity, interference immunity is strong, the signal transmission that the security is good, full play movable fiber connector's superiority, for fiber connector is in the communication trade, it is civilian, for military use field operations trade, the basis is established in the high-speed data transmission field.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the external structure of the socket;

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

FIG. 4 is a schematic view of the external structure of the pre-hole insulator;

FIG. 5 is a cross-sectional view of the insulator behind the hole or the insulator behind the pin;

FIG. 6 is a right side view of FIG. 5;

FIG. 7 is a left side view of FIG. 5;

FIG. 8 is a schematic view of the outer structure of the insulator before the needle;

FIG. 9 is a right side view of FIG. 8;

FIG. 10 is a schematic view of the structure of a Φ 2.5 fiber stub A or a Φ 2.5 fiber stub B;

FIG. 11 is a schematic view of the half-section configuration of FIG. 10;

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

FIG. 13 is a cross-sectional view of the plug;

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;

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 described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the quick-plugging single-core optical fiber connector comprises a plug and a socket which are mutually butted, wherein the plug comprises a plug shell assembly 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 snap spring A10, a phi 2.5 optical fiber 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 2;

the socket comprises a socket shell 14, a front needle insulator 15, a front needle gasket 16, a large spring B17, a rear needle gasket 18, a rear needle insulator 19, a snap spring B20 and a phi 2.5 optical fiber pin B21, 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 snap spring B20, 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 B21 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 B21, the large spring B17 is sleeved on the periphery of the phi 2.5 optical fiber pin B21, the large spring B17 is arranged between the front needle gasket 16 and the rear needle gasket 18, and the phi 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;

when the plug is in butt joint with the socket, the butt joint end of the socket shell 14 is axially inserted into the plug shell 1-1 and is in sliding approach through the ball 13, when the plug is in place, the ball 1-1-2 falls into the arc groove 14-1, the ball 13 upwards jacks up the arc elastic gasket 12, the arc elastic gasket 12 is separated from the limit of the strip groove 1-1-4 of the plug shell 1-1, the connecting nut 1-2 can realize circumferential rotation relative to the plug shell 1-1, 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 is in surface-surface contact with the phi 2.5 optical fiber pin A11 to realize signal transmission, the ceramic sleeve 4 ensures accurate butt joint of the phi 2.5 optical fiber pin A11 and the phi 2.5 optical fiber pin B21, the butt joint state is fixed, and the sealing ring 5 ensures air tightness after butt joint.

Referring to fig. 14-16, the plug housing 1-1 is further provided with positioning grooves 1-1-5, a locking elastic sheet 1-1-6 is arranged 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 arranged on the inner periphery of the connecting nut 1-2, when the plug is not butted with the socket, the locking elastic sheet 1-1-6 is arranged 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, so that the axial locking of the plug shell 1-1 and the socket shell 14 is realized.

Referring to fig. 2-3, a square disc gasket 22 is mounted on the end face of the square disc of the

socket housing

14, and 5 positioning keys are circumferentially arranged on the outer peripheral surface of the socket housing 14, including 1 concave positioning key 14-2, 2 rectangular positioning keys a14-3 located on both sides of the concave positioning key 14-2, and 2 arc positioning keys a14-4 located below the rectangular positioning key a14-3, and a positioning groove structure respectively matched with the concave positioning key 14-2, the 2 rectangular positioning keys a14-3, and the 2 arc positioning keys a14-4 is arranged on the plug housing 1-1, so that when the plug is butted with the socket, the five keys are respectively butted in a matching manner, and an anti-misplugging effect is achieved.

Referring to fig. 4, 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.

Referring to fig. 13, the metal sleeve 3 includes a hollow cylindrical sleeve body 3-1, the front end of the hollow cylindrical sleeve body 3-1 has a torus mouth 3-2 extending towards the inner circumference, the end has a second annular boss 3-3 extending towards the outer circumference, and the hollow cylindrical sleeve body 3-1 is axially disposed 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.

Referring to fig. 5-7, the post-hole insulator 7 and the post-needle insulator 19 have the same structure and are both hollow cylinders, a first annular boss 23 is disposed on the inner periphery of the end of each 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 circumferentially disposed on the outer periphery of each hollow cylinder.

Referring to fig. 8-9, 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. 10-11, the Φ 2.5 fiber stub a11 and the Φ 2.5 fiber stub B21 have the same structure, and each includes 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, 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.

Referring to fig. 11, the front housing 26 includes a first hollow cylinder 26-1, a distal end 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 thread 26-1-1 is provided on an inner circumference of the first hollow cylinder 26-1.

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.

The cross section of the large spring A8 is circular, and the cross section of the large spring B20 is square.

During assembly, Φ 2.5 fiber stub A11 is assembled in the same manner as Φ 2.5 fiber stub B21: 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.

The assembling mode of the socket and the assembling mode of the plug are not described in detail.

The butt joint process of the plug and the socket comprises the following steps: 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. Inside little spring 25 of phi 2.5 fiber stub A11 and phi 2.5 fiber stub B21 is compressed simultaneously during the butt joint, and the elasticity of production makes phi 2.5 ceramic lock pin 24-1 retreat to guarantee certain contact pressure, and the butt joint targets in place with the plug up to the connector socket, and above-mentioned double spring butt joint structure has reduced the terminal surface contact insertion loss after the butt joint greatly, and the loss of like product is about 2dB among the prior art, the utility model discloses the product can reduce the loss to 0.3dB after the institutional advancement. These are incomparable with other common fiber optic contacts.

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 plug and the socket realize the disassembly function of the optical fiber contact pin through the structural design of insulators (the hole rear insulator 7 and the pin rear insulator 19), optical fiber contact pins (phi 2.5 optical fiber contact pins A11 and phi 2.5 optical fiber contact pins B21) and large springs (a large spring A8 and a large spring B17).

The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A quick-plugging single-core optical fiber connector is characterized by comprising a plug and a socket which are mutually butted, wherein the plug comprises a plug shell assembly (1), a hole front insulator (2), a metal sleeve, a ceramic sleeve (4), a sealing ring (5), a hole front gasket (6), a hole rear insulator (7), a large spring A (8), a hole rear gasket (9), a clamp spring A (10), a phi 2.5 optical fiber contact pin A (11), an arc-shaped elastic gasket (12) and balls (13);

2. The quick-plugging single-core optical fiber connector according to claim 1, wherein the plug housing (1-1) is further provided with an installation groove (1-1-5), the installation groove (1-1-5) is internally provided with a locking elastic sheet (1-1-6), the inner periphery of the connecting nut (1-2) is provided with 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), when the plug is not butted with the socket, the locking elastic sheet (1-1-6) is arranged 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), the axial locking of the plug shell (1-1) and the socket shell (14) is realized.

3. The quick-plugging single-core optical fiber connector according to claim 1, wherein a square disc gasket (22) is mounted on the end face of the square disc body of the socket housing (14), 5 positioning keys are circumferentially arranged on the outer peripheral surface of the socket housing, and include 1 concave positioning key (14-2), 2 rectangular positioning keys a (14-3) located on both sides of the concave positioning key (14-2), and 2 arc positioning keys a (14-4) located below the rectangular positioning keys a, and positioning grooves respectively matched with the concave positioning keys (14-2), the 2 rectangular positioning keys a (14-3), and the 2 arc positioning keys a (14-4) are arranged on the plug housing (1-1).

4. The quick-plugging single-core optical fiber connector according to claim 1, wherein the hole front insulator (2) comprises a first cylindrical body (2-1), a first circular inner hole (2-1-1) and a stepped inner hole (2-1-2) are sequentially arranged in the first cylindrical body (2-1) from the front end to the rear end along the axial direction, and 1 first rectangular positioning groove (2-1-3) and 4 first arc-shaped positioning keys (2-1-4) are arranged on the outer periphery of the first cylindrical body (2-1) along the circumferential direction.

5. The quick-plugging single-core optical fiber connector according to claim 1, wherein the post-hole insulator (7) and the post-pin insulator (19) have the same structure, and are both hollow cylinders, a first annular boss (23) is provided at an inner periphery of a distal end of each hollow cylinder, rectangular openings (23-1) are symmetrically provided at an inner side of the first annular boss (23), 2 rectangular grooves (23-2) are symmetrically provided at a 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 provided at an outer periphery of each hollow cylinder along a circumferential direction.

6. A quick-connect-disconnect single-core optical fiber connector according to claim 1, wherein the front insulator (15) includes a second cylindrical body (15-1), a first stepped inner hole (15-2) is provided 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 provided on the outer circumference of the second cylindrical body (15-1) in the circumferential direction;

7. The quick-plugging single-core optical fiber connector according to claim 1, wherein the Φ 2.5 optical fiber pin a (11) and the Φ 2.5 optical fiber pin B (21) have the same structure, and each 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).