CN210742558U

CN210742558U - SC type fiber connector and SC type fiber adapter

Info

Publication number: CN210742558U
Application number: CN201922083986.4U
Authority: CN
Inventors: 李尧乐
Original assignee: Huizhou Feibokang Industrial Co Ltd
Current assignee: Huizhou Feibokang Industrial Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-06-12
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a SC type fiber connector, have internal thread opening and hollow inside casing cover, with inside casing cover threaded connection's lock pin subassembly, tail cover, locking sleeve, outer frame cover including one end, partly surrounding in the telescopic outside of locking of outer frame cover, including the telescopic partly joint of locking between frame cover and the lock pin subassembly. Make the utility model discloses a SC fiber connector's inner structure is more firm reliable, and SC fiber connector provides certain cushioning effect when SC fiber adapter is interacted, has avoided causing the damage to the lock pin component because of the counterpulsation power that the interworking brought, and signal stability is good, and waterproof dustproof effectual, and simple installation, low in manufacturing cost. The utility model provides a SC type optical fiber adapter, spare part is few, and equipment convenient and fast, and waterproof dustproof effectual, it is very convenient to use. Simple installation and low manufacturing cost.

Description

SC type fiber connector and SC type fiber adapter

Technical Field

The utility model relates to a SC type fiber connector and SC type fiber adapter.

Background

In an optical fiber communication system, an SC-type optical fiber connector is generally required to convert an optical fiber signal of an SC-type optical fiber adapter, and two end faces of an optical fiber are precisely butted together, so that optical energy output by a transmitting optical fiber can be coupled into a receiving optical fiber to the maximum extent. The existing SC type optical fiber connector and SC type optical fiber adapter products are difficult to assemble, the production efficiency of the products is low, the cost is multiplied, the product precision is not high due to assembly gaps after the products are assembled, the quality is poor, the signal loss is large when the products are plugged and matched, the reliability is low, the axial positioning effect of the optical fiber connection is poor, and the waterproof effect is poor.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a SC type optical fiber connector and SC type optical fiber adapter.

The utility model provides a technical scheme that its technical problem adopted is: the SC-type optical fiber connector is used for connecting an external optical cable and comprises a hollow inner frame sleeve, a ferrule assembly, a stop sleeve, a tail sleeve and an outer frame sleeve, wherein one end of the inner frame sleeve is provided with an internal thread hole opening, the hollow inner frame sleeve is in threaded connection with the inner frame sleeve, the stop sleeve is arranged on the outer side of the ferrule assembly, the tail sleeve is clamped on the outer side of one end of the stop sleeve, the outer frame sleeve is sleeved on the outer side of one end of a threaded hole in the inner frame sleeve, one part of the outer frame sleeve surrounds the outer side of the stop sleeve, and the other.

Preferably, an annular groove I is formed in the outer side of one end of the internal threaded hole of the inner frame sleeve, an O-shaped ring I is arranged in the annular groove I, and the inner frame sleeve and the outer frame sleeve are in interference fit through the O-shaped ring I.

Preferably, the outer frame sleeve is internally provided with a hollow structure, one end of the outer frame sleeve is provided with a blind hole, the blind hole is surrounded on the outer side of the stop sleeve, the inner wall of the blind hole is provided with stop salient points, the other end of the outer frame sleeve is provided with a stop ring which protrudes inwards, and one end of a threaded hole in the inner frame sleeve is provided with a stop boss corresponding to the stop ring.

Preferably, the locking sleeve is hollow and cylindrical, the bottom of the locking sleeve abuts against the end face of a threaded hole in the inner frame sleeve, a boss I facing the inner side is arranged at the bottom of the locking sleeve, a boss six is arranged in the locking sleeve and located on the boss I, the boss I is clamped between the inner frame sleeve and the ferrule assembly and used for fixing the locking sleeve, the boss six limits the relative position of the ferrule assembly from the outer side, the ferrule assembly extends into a hollow cavity of the locking sleeve, a gasket I surrounding the outer side of the inner frame sleeve is arranged between the locking sleeve and the outer frame sleeve, a boss II protruding outwards from one end of the locking sleeve facing the boss I is arranged on the outer side of the locking sleeve, a plurality of strip-shaped ribs surrounding the surface and having different widths are arranged on the outer side of the locking sleeve, and a chamfer is arranged at one end of.

Preferably, form first chamber between frame cover and the locking sleeve, establish dust cap one in the frame cover, dust cap one establishes the dustproof portion that can insert first intracavity, the outside of dustproof portion is equipped with ring channel two, ring channel two is equipped with waterproof circle, the outside of dustproof portion and the lower part that is located ring channel two are equipped with the wedge groove, the wedge groove is equipped with the opening that flushes with the dustproof portion terminal surface, the upper portion in wedge groove is equipped with the check groove, through waterproof circle interference fit between dustproof portion and the frame cover, the afterbody lock of dust cap one has the retainer plate of taking connection handle one, the other end of connecting handle one is connected with the locking plate of setting between frame cover and tail cover.

Preferably, the outer portion, far away from the inner threaded hole end, of the inner frame sleeve is provided with a third annular groove, the third annular groove is provided with a snap ring, the tail sleeve is clamped on the snap ring, the end, far away from the inner threaded hole end, of the inner frame sleeve is provided with a compression joint ring sleeved on the inner side of the inner frame sleeve, and the compression joint ring is made of metal.

Preferably, the ferrule assembly comprises a hollow stop ring with one end in threaded connection with the inner frame sleeve, the outer side of the stop ring is buckled with a hollow fixed seat, a third boss is arranged inside the fixed seat, a ferrule element clamped between the third boss and the stop ring is arranged in the fixed seat, two ends of the ferrule element respectively extend into the stop ring and the fixed seat, a spring for supporting the ferrule element is arranged at one end of the stop ring facing the ferrule element, the ferrule element comprises a core seat and a ceramic ferrule in interference fit with the core seat, a fourth boss is arranged at the outer side of the core seat, and the fourth boss is clamped between the spring and the third boss.

The utility model provides a SC type optical fiber adapter for above-mentioned SC type fiber connector is mutually supported, includes the casing, fixed mounting has guide holder one in the casing, install the signal needle file in the casing, in signal needle file part extends to guide holder one, the outside of casing is equipped with boss five, the one end that the casing outside is located boss five is equipped with the nut with casing threaded connection.

Preferably, still including dustproof cap two, be equipped with between boss five and the nut and take gasket two of connecting handle two, the other end of connecting handle two is connected with the retainer plate of lock on dustproof cap two, the one end that the nut was kept away from in the casing outside is equipped with ring channel four, ring channel four is equipped with O type circle four, dustproof cap joint is in the outside of casing and with four interference fit of O type circle, the inboard other end of casing still is equipped with dustproof cap three.

Preferably, be equipped with guide holder two in the casing, guide holder two is equipped with the pinhole one that is used for assembling the signal needle file, guide holder one is equipped with the pinhole two that is used for assembling the signal needle file, the equipment signal needle file is installed in pinhole one, pinhole two, the inboard of casing is equipped with a plurality of bar grooves.

The utility model provides a SC type fiber connector, between inner frame cover and lock pin subassembly, the equipment is simple and connection reliability is strong including the locking sleeve joint, and the pottery lock pin is connected with core print interference fit, and the boss four joints of core print are between spring and boss three, inject the mounted position of lock pin component, make the lock pin component have certain motivity between spring and boss three simultaneously, through the spring action of spring, make the utility model discloses a SC fiber connector's inner structure is more firm reliable, and SC fiber connector provides certain cushioning effect when SC fiber adapter carries out the interaction, has avoided causing the damage to the lock pin component because of the hedging force that each other joins in marriage and has brought, and signal stability is good, and waterproof dustproof effectual, and simple installation, low in manufacturing cost.

The utility model provides a SC type optical fiber adapter, spare part is few, and equipment convenient and fast, and waterproof dustproof effectual, it is very convenient to use. Simple installation and low manufacturing cost.

The utility model discloses simple structure, simple to operate.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural diagram of an SC-type optical fiber connector according to the present invention;

FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;

fig. 3 is an exploded schematic view of an SC-type optical fiber connector according to the present invention;

fig. 4 is a schematic partial structural view of an SC-type optical fiber connector according to the present invention;

FIG. 5 is a schematic sectional view taken along line B-B of FIG. 4;

fig. 6 is a schematic diagram of a central cross-sectional structure of an outer frame sleeve of an SC-type optical fiber connector according to the present invention;

fig. 7 is a schematic structural diagram of a first SC-type optical fiber connector dust cap of the present invention;

fig. 8 is a schematic view of a stop sleeve of an SC-type fiber optic connector according to the present invention;

fig. 9 is a schematic diagram of a central cross-sectional structure of an inner frame sleeve of an SC-type optical fiber connector according to the present invention;

fig. 10 is a schematic diagram of a center cross-sectional structure of a holder of an SC-type optical fiber connector according to the present invention;

fig. 11 is a schematic structural diagram of an SC-type optical fiber adapter according to the present invention;

fig. 12 is a schematic diagram of a central cross-sectional structure of an SC-type optical fiber adapter according to the present invention;

fig. 13 is a schematic structural view of an SC-type optical fiber adapter housing according to the present invention;

fig. 14 is an exploded view of an SC-type fiber optic adapter housing according to the present invention;

FIG. 15 is a cross-sectional view of the center of a SC fiber optic adapter housing according to the present invention;

fig. 16 is a schematic diagram of a center sectional structure of a guide seat of an SC-type fiber adapter according to the present invention.

Detailed Description

Referring to fig. 1 to 10, the present invention is implemented as follows: the SC-type optical fiber connector is used for connecting an external optical cable 100 and comprises a hollow inner frame sleeve 1 with an opening of an internal thread hole 11 at one end, a ferrule assembly 2 in threaded connection with the inner frame sleeve 1, a stop sleeve 4 arranged on the outer side of the ferrule assembly 2, a tail sleeve 3 clamped on the outer side of the other end of the stop sleeve 4, and an outer frame sleeve 5 sleeved on the outer side of one end of the internal thread hole 11 of the inner frame sleeve 1, wherein one part of the outer frame sleeve 5 is surrounded on the outer side of the stop sleeve 4, and one part of the stop sleeve 4 is clamped between the inner frame sleeve 1 and the ferrule assembly 2. Threaded connection between inner frame cover 1 and the lock pin subassembly 2, the locking sleeve 4 joint is including between inner frame cover 1 and the lock pin subassembly 2, and the equipment is simple and connection reliability is strong.

The one end outside of inner frame cover 1's internal thread hole 11 is equipped with ring channel 12, be equipped with O type circle 13 in the ring channel 12, through O type circle 13 interference fit between inner frame cover 1 and the outer frame cover 5, can guarantee the firm reliable of inner frame cover 1 and outer frame cover 5, O type circle 13's design has water-proof effects moreover, makes the utility model discloses can not influence signal connection under the abominable state of environment, and increase the utility model discloses a practical life.

The inner frame sleeve 5 is internally provided with a hollow structure, one end of the outer frame sleeve 5 is provided with a blind hole 51, the blind hole 51 is surrounded on the outer side of the stop sleeve 4, the inner wall of the blind hole 51 is provided with stop salient points 52, and meanwhile, the position stability of the inner frame sleeve 1 is ensured. The other end of the outer frame sleeve 5 is provided with a baffle ring 53 which protrudes inwards, and one end of the threaded hole 11 in the inner frame sleeve 1 is provided with a stop boss 18 which corresponds to the baffle ring 53.

The inner frame sleeve 1 is assembled from the blind hole 51 end of the outer frame sleeve 5 until the area of the O-shaped ring I13 is formed, the inner frame sleeve 1 and the outer frame sleeve 5 are in interference fit through the O-shaped ring I13, the baffle ring 53 and the stop boss 18 limit the relative position of the inner frame sleeve 1 and the outer frame sleeve 5, and the baffle ring 53 and the stop boss 18 can ensure that the top of the inner frame sleeve 1 is not lower than the bottom of the blind hole 51, so that the installation is very convenient.

The locking sleeve 4 is hollow and cylindrical, the bottom of the locking sleeve 4 abuts against the end face of the threaded hole 11 in the inner frame sleeve 1, a boss I41 facing the inner side is arranged at the bottom of the locking sleeve 4, a boss VI 42 is arranged in the locking sleeve 4 and located above the boss I41, the boss I41 is clamped between the inner frame sleeve 1 and the ferrule assembly 2 to fix the locking sleeve 4, the boss VI 42 defines the relative position of the ferrule assembly 2 from the outer side, the ferrule assembly 2 extends into the hollow cavity of the locking sleeve 4, a gasket I6 surrounding the outer side of the inner frame sleeve 1 is arranged between the locking sleeve 4 and the outer frame sleeve 5, the locking sleeve 4 can be more stably fixed between the inner frame sleeve 1 and the ferrule assembly 2 due to the design of the gasket I6, and one end of the locking sleeve 4 facing the boss I41 protrudes outwards from a boss II 43.

Form first chamber 51 between the outer frame cover 5 and the locking sleeve 4, establish dustproof cap one 7 in the outer frame cover 5, dustproof cap one 7 establishes the dustproof portion 71 that can insert in first chamber 51, the outside of dustproof portion 71 is equipped with two ring channels 711, two ring channels 711 are equipped with waterproof circle 712, the outside of dustproof portion 71 and the lower part that is located two ring channels 711 are equipped with wedge groove 716, wedge groove 716 is equipped with the opening that flushes with dustproof portion 71 terminal surface, the upper portion of wedge groove 716 is equipped with ends the groove 717.

The dustproof portion 71 and the outer frame sleeve 5 are in interference fit through a waterproof ring 712, the tail portion of the dustproof cap I7 is locked with a fixing ring 714 with a first connecting handle 713, and the other end of the first connecting handle 713 is connected with a locking plate 715 arranged between the outer frame sleeve 5 and the tail sleeve 3. Waterproof circle 712's design can protect the utility model discloses keep dry clean state when not needing to use, prevent that the environment is abominable right the utility model discloses a corruption can prevent other impurity infiltration such as water or dust, increases the utility model discloses a practical life. The dustproof cap is connected with the inner frame sleeve 1 through the connecting handle I713, so that convenience is brought to the use of the dustproof cap I7, and the dustproof cap I7 does not need to be specially arranged when the dustproof cap I7 is not used.

And a strip rib 44 surrounding the surface is arranged on the outer side of the stop sleeve 4, and a chamfer 45 is arranged at one end of the strip rib 44, which is far away from the second boss 43, so that the C optical fiber connector and the SC optical fiber adapter can be matched with each other, and the first dust cap 7 can be sleeved in the groove. The strip-shaped ribs 44 are provided with three strips which surround the outer side of the stop sleeve 4 and have different widths, and the angles of the intervals between the three strips 44 are different. The rib 44 with the chamfer 45 adds to the stop sleeve 4 and also facilitates the insertion of the first dust cap 7 into the first cavity 51. When the first dust cap 7 is inserted into the first cavity 51, the opening of the wedge-shaped groove 716 is aligned with the stop protrusion 52, the interference between the stop protrusion 52 and the wedge-shaped groove 716 and the interference between the dust-proof part 71 and the second boss 43 limit the depth of the first dust cap 7 which can enter the first cavity 51, and then the first dust cap 7 is twisted to enable the stop protrusion 52 to enter the stop groove 717, so that the first dust cap 7 is locked with the outer frame sleeve 5.

The outer portion, far away from the threaded hole end, of the inner frame sleeve 1 is provided with a third annular groove 14, the third annular groove 14 is provided with a clamping ring 15, the tail sleeve 3 is connected to the clamping ring 15 in a clamping mode, a crimping ring 16 sleeved on the inner side of the inner frame sleeve 1 is arranged, far away from the threaded hole end, of the inner frame sleeve, and the crimping ring 16 is made of metal. The outer surface of the crimp ring 16 is provided with a texture structure, so that the crimp ring 16 can press the optical cable 100 under stress.

Threaded connection has guaranteed the correct installation of inner frame cover 1 between inner frame cover 1 and the lock pin subassembly 2, and can not rotate after the installation of inner frame cover 1, has better circumference positioning action, can prevent that lock pin subassembly 2 from twisting, has increased the anti torsional ability of inner frame cover 1 in outer frame cover 5 simultaneously, and optic fibre butt joint quality is high, the butt joint back optic fibre is difficult to shift, the reliability is high. The inner frame sleeve 1 can be arranged according to the type of the external optical cable 100 and can be used for fixing the circular optical cable 100 when being matched with the matched circular optical cable 100; and may be used to secure ribbon cable 100 when mated with mating ribbon cable 100. After the outer optical cable 100 is connected to the outer optical cable 100, the rear end of the crimp ring 16 is tightly crimped to the outer optical cable 100, thereby fixing the outer optical cable 100. The crimping ring 16 is made of aluminum, so that the crimping ring cannot crack after being deformed, and the crimping is firm and reliable.

The lock pin assembly 2 comprises a hollow stop ring 21 with one end connected with the inner frame sleeve 1 in a threaded mode, the outer side of the stop ring 21 is buckled with a hollow fixing seat 22, the stop ring 21 is provided with a buckle protruding outwards, a clamping window is arranged on the side face of the fixing seat 22, and the fixing seat 22 and the stop ring 21 are connected with the clamping window in a clamped mode through the buckle. The ferrule holder is characterized in that a third boss 23 is arranged inside the fixed seat 22, a ferrule element 24 clamped between the third boss 23 and the stop ring 21 is arranged in the fixed seat 22, two ends of the ferrule element 24 respectively extend into the stop ring 21 and the fixed seat 22, one end of the stop ring 21 facing the ferrule element 24 is provided with a spring 25 for supporting the ferrule element 24, the ferrule element 24 comprises a core seat 241 and a ceramic ferrule 242 in interference fit with the core seat 241, a fourth boss 243 is arranged on the outer side of the core seat 241, and the fourth boss 243 is clamped between the spring 25 and the third boss 23.

The utility model discloses a pottery lock pin 242 is connected with core print 241 interference fit, and four 243 joints of boss of core print 241 are between spring 25 and three 23 of boss, inject the mounted position of lock pin component 24, make lock pin component 24 have certain activity simultaneously between spring 25 and three 23 of boss, through the spring action of spring 25, make the utility model discloses a SC fiber connector's inner structure is more firm reliable, and provides certain cushioning effect when SC fiber connector and SC fiber adapter interact, has avoided causing the damage to lock pin component 24 because of the impulsive force that each other joins in marriage and has brought, and signal stability is good, long service life.

Referring to fig. 10 to 16, the present invention further provides an SC-type optical fiber adapter for mutual matching with the SC optical fiber connector of any one of the above claims, including a housing 8, a first guide seat 81 is fixedly installed in the housing 8, a signal needle seat 82 is installed in the housing 8, a part of the signal needle seat 82 extends into the first guide seat 81, a fifth boss 83 is installed on the outer side of the housing 8, and a nut 9 screwed with the housing 8 is installed at one end of the housing 8, which is located at the fifth boss 83, of the outer side of the housing 8. The inside of the shell 8 is provided with a second guide seat 87, the second guide seat 87 is provided with a first pinhole 871 used for assembling the signal needle seat 82, the first guide seat 81 is provided with a second pinhole 811 used for assembling the signal needle seat 82, during assembly, the signal needle seat 82 is firstly assembled into the first pinhole 871, then the first guide seat 81 is clamped inside the shell 8, and meanwhile, the signal needle seat 82 is ensured to be sleeved into the second pinhole 811, and the assembly can be completed. The spare part is few, and the equipment convenient and fast. The inboard of casing is equipped with the three bar groove 88 that corresponds with bar muscle 44, and when SC fiber connector and SC optic fibre adapter interacted, bar muscle 44 had to correspond with corresponding bar groove 88 just can the success of mutually supporting, and the effect of location when both can reaching the interwork can also prevent to misplace when mutually supporting.

The utility model provides a pair of SC type optical fiber adapter is still including two 10 of dustproof caps, be equipped with two 92 of gasket of taking two 91 of connecting handle between five 83 of boss and the nut 9, the other end of connecting two 91 of handle is connected with retainer plate 714 of lock on two 10 of dustproof caps, the one end that nut 9 was kept away from in the casing 8 outside is equipped with ring channel four 84, ring channel four 84 is equipped with O type circle four 86, dustproof cap joint in the outside of casing 8 and with O type circle four 86 interference fit, the inboard other end of casing 8 still is equipped with three 85 of dustproof caps, three 85 of dustproof caps insert in guide holder 81.

The one end that 8 outsides of casing are located guide holder two 87 is equipped with guide way and joint groove, and two 10 dustproof caps slide in then the card is convenient and fast in the joint inslot from the guide way, interference fit between three 85 of dustproof cap and the casing 8 that four 86 are of O type circle prevents that the environment is abominable right the utility model discloses a corruption can prevent other impurity infiltration such as water or dust, increases the utility model discloses a practical life. And the second dust cap 10 is connected with the second connecting handle 91, so that the second dust cap 10 can be prevented from falling off, and the problem of arrangement when the second dust cap 10 is not needed can be solved.

Turn round nut 9 open, can with the utility model discloses a SC fiber adapter embolias the panel to hug closely the panel with two 92 gaskets, then lock nut 9 can will the utility model discloses a SC fiber adapter is fixed with the panel, and two 92 gaskets's design can make the utility model discloses a SC fiber adapter can prevent that the outside debris of panel or steam from getting into the panel inboard with the more firm while of panel fixation, thereby increases the utility model discloses a life-span.

Open dustproof cap one 7 and two 10 dustproof caps, will the utility model discloses in SC fiber connector inserted SC fiber adapter, ceramic lock pin 242 inserted signal needle file 82 can the use of mutually supporting, if do not need the use of mutually supporting, will dustproof cap one 7 and two 10 dustproof caps embolia respectively in outer frame cover 5 and casing 8 can.

Claims

1. The utility model provides a SC type fiber connector for connect outside optical cable (100), characterized by include that one end has interior frame cover (1) of internal thread hole (11) opening and cavity, with interior frame cover (1) threaded connection's lock pin subassembly (2), set up locking sleeve (4) in the lock pin subassembly (2) outside, joint tail cover (3) in locking sleeve (4) one end outside, cup joint outer frame cover (5) in the one end outside of interior frame cover (1) internal thread hole (11), partly surround in the outside of locking sleeve (4) of outer frame cover (5), another part joint of locking sleeve (4) is between interior frame cover (1) and lock pin subassembly (2).

2. The SC type optical fiber connector as recited in claim 1, wherein an annular groove I (12) is arranged on the outer side of one end of the internal threaded hole (11) of the inner frame sleeve (1), an O-shaped ring I (13) is arranged in the annular groove I (12), and the inner frame sleeve (1) and the outer frame sleeve (5) are in interference fit through the O-shaped ring I (13).

3. The SC type optical fiber connector according to claim 1, wherein the outer frame sleeve (5) is hollow, a blind hole (51) is formed at one end of the outer frame sleeve (5), the blind hole (51) surrounds the outer side of the stop sleeve (4), a stop salient point (52) is formed on the inner wall of the blind hole (51), a stop ring (53) protruding inwards is formed at the other end of the outer frame sleeve (5), and a stop lug boss (18) corresponding to the stop ring (53) is formed at one end of the internal thread hole (11) of the inner frame sleeve (1).

4. The SC type optical fiber connector according to claim 1 or 3, wherein the stop sleeve (4) is provided with a hollow cylindrical shape, the bottom of the stop sleeve (4) abuts against the end surface of the internally threaded hole (11) of the inner frame sleeve (1), the bottom of the stop sleeve (4) is provided with a first boss (41) facing inwards, a sixth boss (42) is provided in the stop sleeve (4) and positioned above the first boss (41), the first boss (41) is clamped between the inner frame sleeve (1) and the ferrule assembly (2) for fixing the stop sleeve (4), the sixth boss (42) defines the relative position of the ferrule assembly (2) from the outside, the ferrule assembly (2) extends into the hollow cavity of the stop sleeve (4), a first gasket (6) surrounding the outer side of the inner frame sleeve (1) is provided between the stop sleeve (4) and the outer frame sleeve (5), the one end of locking sleeve (4) towards boss one (41) is outside outstanding boss two (43), many strip muscle (44) that encircle the surface and the width is inconsistent are established to the outside of locking sleeve (4), chamfer (45) are established to the one end that boss two (43) are kept away from in strip muscle (44).

5. The SC type optical fiber connector according to claim 1 or 3, wherein a first cavity (51) is formed between the outer frame sleeve (5) and the stop sleeve (4), a first dust cap (7) is arranged in the outer frame sleeve (5), the first dust cap (7) is provided with a dust-proof part (71) which can be inserted into the first cavity (51), the outer side of the dust-proof part (71) is provided with a second annular groove (711), the second annular groove (711) is provided with a waterproof ring (712), the outer side of the dust-proof part (71) and the lower part of the second annular groove (711) are provided with a wedge-shaped groove (716), the wedge-shaped groove (716) is provided with an opening which is flush with the end face of the dust-proof part (71), the upper part of the wedge-shaped groove (716) is provided with a stop groove (717), the dust-proof part (71) is matched with the outer frame sleeve (5) through the waterproof ring (712), and the tail part of the first dust cap (7) is locked with a fixing ring (714) with, the other end of the first connecting handle (713) is connected with a locking plate (715) arranged between the outer frame sleeve (5) and the tail sleeve (3).

6. The SC type optical fiber connector according to claim 1, wherein the inner frame sleeve (1) is provided with a third annular groove (14) at the outer part far away from the end of the inner threaded hole (11), the third annular groove (14) is provided with a snap ring (15), the tail sleeve (3) is clamped on the snap ring (15), the end of the inner frame sleeve (1) far away from the inner threaded hole (11) is provided with a press-connection ring (16) sleeved on the inner side of the inner frame sleeve, and the press-connection ring (16) is made of metal.

7. The SC type optical fiber connector according to claim 1, wherein the ferrule assembly (2) comprises a hollow stop ring (21) having one end connected with the inner frame sleeve (1) by a screw thread, the outer side of the stop ring (21) is fastened with a hollow fixed seat (22), the inside of the fixed seat (22) is provided with a third boss (23), the fixed seat (22) is internally provided with a ferrule element (24) clamped between the third boss (23) and the stop ring (21), two ends of the ferrule element (24) respectively extend into the stop ring (21) and the fixed seat (22), one end of the stop ring (21) facing the ferrule element (24) is provided with a spring (25) for supporting the ferrule element (24), the ferrule element (24) comprises a core seat (241) and a ceramic ferrule (242) in interference fit with the core seat (241), the outer side of the core seat (241) is provided with a fourth boss (243), the boss IV (243) is clamped between the spring (25) and the boss III (23).

8. An SC type optical fiber adapter is used for the SC type optical fiber connector mutual matching of any one of claims 1 to 7, and is characterized by comprising a shell (8), wherein a first guide seat (81) is fixedly installed in the shell (8), a signal needle seat (82) is installed in the shell (8), one part of the signal needle seat (82) extends into the first guide seat (81), a fifth boss (83) is arranged on the outer side of the shell (8), and a nut (9) in threaded connection with the shell (8) is arranged at one end, located on the fifth boss (83), of the outer side of the shell (8).

9. The SC type optical fiber adapter according to claim 8, further comprising a second dust cap (10), a second gasket (92) with a second connection handle (91) is arranged between the fifth boss (83) and the nut (9), the other end of the second connection handle (91) is connected with a fixed ring (714) locked on the second dust cap (10), one end of the outer side of the housing (8) far away from the nut (9) is provided with a fourth annular groove (84), the fourth annular groove (84) is provided with a fourth O-ring (86), the dust cap is clamped on the outer side of the housing (8) and is in interference fit with the fourth O-ring (86), and the other end of the inner side of the housing (8) is further provided with a third dust cap (85).

10. The SC type optical fiber adapter according to claim 8, wherein a second guide seat (87) is arranged in the shell (8), the second guide seat (87) is provided with a first pinhole (871) for assembling the signal needle holder (82), the first guide seat (81) is provided with a second pinhole (811) for assembling the signal needle holder (82), the assembled signal needle holder (82) is installed in the first pinhole (871) and the second pinhole (811), and the inner side of the shell is provided with a plurality of strip-shaped grooves (88).