SC type optical fiber connector and SC type optical fiber adapter

Abstract

The present invention discloses an SC type optical fiber connector, comprising an inner frame sleeve having an internal thread opening at one end and being hollow, a core assembly threadedly connected to the inner frame sleeve, a tail sleeve, a stop sleeve, and an outer frame sleeve, wherein a portion of the outer frame sleeve surrounds the outside of the stop sleeve, and a portion of the stop sleeve is clamped between the inner frame sleeve and the core assembly. The internal structure of the SC optical fiber connector of the present invention is made more solid and reliable, and the SC optical fiber connector provides a certain buffering effect when mating with the SC optical fiber adapter, thereby avoiding damage to the core assembly caused by the impact force caused by the mating, and the signal stability is good, and the waterproof and dustproof effect is good, and the installation is simple and the manufacturing cost is low. The present invention provides an SC type optical fiber adapter with fewer parts, and is quick and easy to assemble, has good waterproof and dustproof effect, and is very convenient to use. It is easy to install and has a low manufacturing cost.

Description

Technical Field

[0001] The invention relates to an SC type optical fiber connector and an SC type optical fiber adapter. Background Art

[0002] In the optical fiber communication system, SC type optical fiber connector is usually required to convert the optical fiber signal of SC type optical fiber adapter, and the two end faces of the optical fiber are precisely connected so that the light energy output by the transmitting optical fiber can be coupled to the receiving optical fiber to the maximum extent. SC type optical fiber connector and SC type optical fiber adapter play a very important role as optical cable connection and switching devices, so that the light energy output by the transmitting optical fiber can be converted to the 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 and the cost increases exponentially. After the products are assembled, the product precision is not high and the quality is poor due to the assembly gap. The signal loss is large when the two 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. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an SC type optical fiber connector and an SC type optical fiber adapter.

[0004] The technical solution adopted by the present invention to solve its technical problem is: an SC type optical fiber connector, used to connect an external optical cable, including a hollow inner frame sleeve with an internal threaded hole opening at one end, a core assembly threadedly connected to the inner frame sleeve, a stop sleeve arranged on the outside of the core assembly, a tail sleeve clamped on the outside of one end of the stop sleeve, and an outer frame sleeve sleeved on the outside of one end of the internal threaded hole of the inner frame sleeve, a part of the outer frame sleeve surrounds the outside of the stop sleeve, and the other part of the stop sleeve is clamped between the inner frame sleeve and the core assembly.

[0005] Preferably, an annular groove 1 is provided on the outer side of one end of the internal threaded hole of the inner frame sleeve, an O-ring 1 is provided in the annular groove 1, and the inner frame sleeve and the outer frame sleeve are interference-fitted through the O-ring 1.

[0006] Preferably, the outer frame sleeve is hollow inside, a blind hole is provided at one end of the outer frame sleeve, the blind hole is surrounded by the outside of the stop sleeve, a stop protrusion is provided on the inner wall of the blind hole, an inwardly convex retaining ring is provided at the other end of the outer frame sleeve, and a stop boss corresponding to the retaining ring is provided at one end of the inner threaded hole of the inner frame sleeve.

[0007] Preferably, the stop sleeve is in the shape of a hollow cylinder, the bottom of the stop sleeve abuts against the end face of the threaded hole in the inner frame sleeve, the bottom of the stop sleeve is provided with a boss one facing inward, a boss six is ​​provided inside the stop sleeve and located above the boss one, the boss one is clamped between the inner frame sleeve and the core plug assembly to fix the stop sleeve, the boss six limits the relative position of the core plug assembly from the outside, the core plug assembly extends into the hollow cavity of the stop sleeve, a gasket one surrounding the outside of the inner frame sleeve is provided between the stop sleeve and the outer frame sleeve, a boss two protruding outward from one end of the stop sleeve toward the boss one, a plurality of strip ribs with inconsistent widths surrounding the surface are provided on the outside of the stop sleeve, and a chamfer is provided on the end of the strip rib away from the boss two.

[0008] Preferably, a first cavity is formed between the outer frame sleeve and the stop sleeve, a dust cap is provided inside the outer frame sleeve, the dust cap is provided with a dustproof part that can be inserted into the first cavity, an annular groove is provided on the outer side of the dustproof part, a waterproof ring is provided on the annular groove, a wedge-shaped groove is provided on the outer side of the dustproof part and located at the lower part of the annular groove, the wedge-shaped groove is provided with an opening flush with the end face of the dustproof part, a stop groove is provided on the upper part of the wedge-shaped groove, the dustproof part and the outer frame sleeve are interference fit through the waterproof ring, the tail of the dust cap is locked with a fixing ring with a connecting handle, and the other end of the connecting handle is connected to a locking plate arranged between the outer frame sleeve and the tail sleeve.

[0009] Preferably, the inner frame sleeve is provided with an annular groove three on the outside away from the internal threaded hole end, the annular groove three is provided with a clamping ring, the tail sleeve is clamped on the clamping ring, the inner frame sleeve is provided with a crimping ring sleeved on the inner side thereof away from the internal threaded hole end, and the crimping ring is made of metal.

[0010] Preferably, the ferrule assembly includes a hollow stop ring with one end threadedly connected to the inner frame sleeve, a hollow fixing seat is buckled on the outer side of the stop ring, a boss three is provided inside the fixing seat, a ferrule element is provided in the fixing seat and is clamped between the boss three and the stop ring, the two ends of the ferrule element extend into the stop ring and the fixing seat respectively, a spring for supporting the ferrule element is provided at one end of the stop ring facing the ferrule element, the ferrule element includes a core seat and a ceramic ferrule that is interference fit with the core seat, a boss four is provided on the outer side of the core seat, and the boss four is clamped between the spring and the boss three.

[0011] An SC type optical fiber adapter, used for intermate with the above-mentioned SC type optical fiber connector, comprises a shell, a guide seat 1 is fixedly installed in the shell, a signal needle seat is installed in the shell, a part of the signal needle seat extends into the guide seat 1, a boss 5 is provided on the outside of the shell, and a nut threadedly connected to the shell is provided at one end of the boss 5 on the outside of the shell.

[0012] Preferably, a dust cap 2 is also included, a gasket 2 with a connecting handle 2 is provided between the boss 5 and the nut, the other end of the connecting handle 2 is connected to a fixing ring locked on the dust cap 2, an annular groove 4 is provided at one end of the outer side of the shell away from the nut, an O-ring 4 is provided in the annular groove 4, the dust cap is clamped on the outer side of the shell and has an interference fit with the O-ring 4, and a dust cap 3 is also provided at the other end of the inner side of the shell.

[0013] Preferably, a guide seat 2 is provided in the shell, the guide seat 2 is provided with a pinhole 1 for assembling the signal needle seat, the guide seat 1 is provided with a pinhole 2 for assembling the signal needle seat, the assembled signal needle seat is installed in pinhole 1 and pinhole 2, and a plurality of strip grooves are provided on the inner side of the shell.

[0014] The present invention provides an SC type optical fiber connector, wherein the stop sleeve is clamped between the inner frame sleeve and the ferrule assembly, the assembly is simple and the connection reliability is strong, the ceramic ferrule is connected to the core seat by interference fit, the boss four of the core seat is clamped between the spring and the boss three, the installation position of the ferrule element is limited, and at the same time the ferrule element has a certain mobility between the spring and the boss three, and the internal structure of the SC optical fiber connector of the present invention is more firm and reliable through the elastic force of the spring, and the SC optical fiber connector provides a certain buffering effect when the SC optical fiber adapter is mated with each other, so that the damage to the ferrule element caused by the impact force caused by the mating is avoided, the signal stability is good, and the waterproof and dustproof effect is good, and the installation is simple and the manufacturing cost is low.

[0015] The present invention provides an SC type optical fiber adapter, which has fewer parts, is easy and quick to assemble, has good waterproof and dustproof effects, is very convenient to use, is easy to install, and has low manufacturing cost.

[0016] The invention has a simple structure and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a structural schematic diagram of an SC type optical fiber connector of the present invention;

[0019] Figure 2 yes Figure 1 AA cross-sectional diagram of ;

[0020] Figure 3 It is a schematic diagram of the exploded structure of an SC type optical fiber connector of the present invention;

[0021] Figure 4 It is a partial structural schematic diagram of an SC type optical fiber connector of the present invention;

[0022] Figure 5 yes Figure 4BB cross-sectional diagram;

[0023] Figure 6 It is a schematic diagram of the central cross-sectional structure of an outer frame sleeve of an SC type optical fiber connector of the present invention;

[0024] Figure 7 It is a structural schematic diagram of a dust cap of an SC type optical fiber connector of the present invention;

[0025] Figure 8 It is a structural schematic diagram of a stop sleeve of an SC type optical fiber connector of the present invention;

[0026] Fig. 9 It is a schematic diagram of the central cross-sectional structure of an inner frame sleeve of an SC type optical fiber connector of the present invention;

[0027] Fig.10 It is a schematic diagram of the central cross-sectional structure of an SC type optical fiber connector fixing seat of the present invention;

[0028] Fig.11 It is a structural schematic diagram of an SC type optical fiber adapter of the present invention;

[0029] Fig.12 It is a schematic diagram of the central cross-sectional structure of an SC type optical fiber adapter of the present invention;

[0030] Fig.13 It is a schematic diagram of the structure of an SC type optical fiber adapter housing of the present invention;

[0031] Fig.14 It is a schematic diagram of the exploded structure of an SC type optical fiber adapter housing of the present invention;

[0032] Fig.15 It is a central cross-sectional structural diagram of an SC type optical fiber adapter housing of the present invention;

[0033] Fig.16 The present invention is a central cross-sectional structural diagram of an SC type optical fiber adapter guide seat. DETAILED DESCRIPTION

[0034] Reference Figures 1 to 10The present invention is implemented as follows: an SC type optical fiber connector, used to connect an external optical cable 100, includes an inner frame sleeve 1 with an inner thread hole 11 opening at one end and hollow, a core assembly 2 threadedly connected to the inner frame sleeve 1, a stop sleeve 4 arranged on the outside of the core assembly 2, a tail sleeve 3 clamped on the outside of the other end of the stop sleeve 4, and an outer frame sleeve 5 sleeved on the outside of one end of the inner thread hole 11 of the inner frame sleeve 1, a part of the outer frame sleeve 5 surrounds the outside of the stop sleeve 4, and a part of the stop sleeve 4 is clamped between the inner frame sleeve 1 and the core assembly 2. The inner frame sleeve 1 and the core assembly 2 are threadedly connected, and the stop sleeve 4 is clamped between the inner frame sleeve 1 and the core assembly 2, which is simple to assemble and has strong connection reliability.

[0035] An annular groove 12 is provided on the outer side of one end of the internal threaded hole 11 of the inner frame sleeve 1, and an O-ring 13 is provided in the annular groove 12. The inner frame sleeve 1 and the outer frame sleeve 5 are interference-fitted by the O-ring 13, which can ensure the firmness and reliability of the inner frame sleeve 1 and the outer frame sleeve 5, and the design of the O-ring 13 has a waterproof effect, so that the present invention can be used in harsh environments without affecting signal connection and increase the practical life of the present invention.

[0036] The outer frame sleeve 5 is hollow inside, and a blind hole 51 is provided at one end of the outer frame sleeve 5. The blind hole 51 surrounds the outer side of the stop sleeve 4, and a stop convex point 52 is provided on the inner wall of the blind hole 51 to ensure the stability of the position of the inner frame sleeve 1. The other end of the outer frame sleeve 5 is provided with a stop ring 53 convex inwardly, and one end of the inner threaded hole 11 of the inner frame sleeve 1 is provided with a stop boss 18 corresponding to the stop ring 53.

[0037] The inner frame sleeve 1 is assembled from the blind hole 51 end of the outer frame sleeve 5 to the O-ring 13 area. The inner frame sleeve 1 and the outer frame sleeve 5 are interference fit through the O-ring 13. The retaining ring 53 and the stop boss 18 define the relative position of the inner frame sleeve 1 and the outer frame sleeve 5. The setting of the retaining 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, which is also very convenient during installation.

[0038] The stop sleeve 4 is provided with a hollow cylindrical shape, and the bottom of the stop sleeve 4 abuts against the end face of the inner threaded hole 11 of the inner frame sleeve 1. The bottom of the stop sleeve 4 is provided with a boss 41 facing inward, and a boss 6 42 is provided inside the stop sleeve 4 and located above the boss 41. The boss 41 is clamped between the inner frame sleeve 1 and the core plug assembly 2 to fix the stop sleeve 4, and the boss 6 42 limits the relative position of the core plug assembly 2 from the outside. The core plug assembly 2 extends into the hollow cavity of the stop sleeve 4, and a gasket 6 surrounding the outside of the inner frame sleeve 1 is provided between the stop sleeve 4 and the outer frame sleeve 5. The design of the gasket 6 enables the stop sleeve 4 to be more stably fixed between the inner frame sleeve 1 and the core plug assembly 2. The stop sleeve 4 has a boss 2 43 protruding outward at one end of the boss 41.

[0039] A first cavity is formed between the outer frame sleeve 5 and the stop sleeve 4, a dust cap 7 is arranged inside the outer frame sleeve 5, the dust cap 7 is provided with a dustproof part 71 which can be inserted into the first cavity, an annular groove 2 711 is arranged on the outer side of the dustproof part 71, the annular groove 2 711 is provided with a waterproof ring 712, a wedge-shaped groove 716 is arranged on the outer side of the dustproof part 71 and located at the lower part of the annular groove 2 711, the wedge-shaped groove 716 is provided with an opening flush with the end face of the dustproof part 71, and a stop groove 717 is arranged on the upper part of the wedge-shaped groove 716.

[0040] The dustproof part 71 is interference fit with the outer frame sleeve 5 through the waterproof ring 712, and the tail of the dust cap 7 is locked with a fixing ring 714 with a connecting handle 713, and the other end of the connecting handle 713 is connected to a locking piece 715 arranged between the outer frame sleeve 5 and the tail sleeve 3. The design of the waterproof ring 712 can protect the present invention from being corroded by the harsh environment, and can prevent water or other impurities such as dust from penetrating, thereby increasing the practical life of the present invention. The dust cap is connected to the inner frame sleeve 1 through the connecting handle 713, which brings convenience to the use of the dust cap 7, and there is no need to specially place the dust cap 7 when the dust cap 7 is not needed.

[0041] The outer side of the stop sleeve 4 is provided with a strip rib 44 surrounding the surface, and the end of the strip rib 44 away from the boss 2 43 is provided with a chamfer 45, which is conducive to the mutual mating of the C fiber connector and the SC fiber adapter, and is also conducive to the insertion of the dust cap 7. The strip rib 44 is provided with three strips of different widths surrounding the outer side of the stop sleeve 4, and the interval angles between the three strip ribs 44 are different. The strip rib 44 with the chamfer 45 increases the stop sleeve 4, and also facilitates the insertion of the dust cap 7 into the blind hole 51. When the dust cap 7 is inserted into the blind hole 51, the opening of the wedge-shaped groove 716 is aligned with the stop protrusion 52. The depth to which the dust cap 7 can enter the blind hole 51 is limited by the interference between the stop protrusion 52 and the wedge-shaped groove 716 and the interference between the dustproof part 71 and the boss 2 43. Then the dust cap 7 is twisted to make the stop protrusion 52 enter the stop groove 717, thereby locking the dust cap 7 and the outer frame sleeve 5.

[0042] The outer side of the inner frame sleeve 1 away from the threaded hole end is provided with an annular groove 3 14, and the annular groove 3 14 is provided with a clamping ring 15, and the tail sleeve 3 is clamped on the clamping ring 15. The inner frame sleeve 1 is provided with a crimping ring 16 sleeved on the inner side of the inner frame sleeve 1 away from the threaded hole end, and the crimping ring 16 is made of metal. The outer surface of the crimping ring 16 is provided with a texture structure, so that the crimping ring 16 can be pressed against the optical cable 100.

[0043] The inner frame sleeve 1 is threadedly connected to the ferrule assembly 2, which ensures the correct installation of the inner frame sleeve 1. The inner frame sleeve 1 will not rotate after installation, and has a good circumferential positioning effect, which can prevent the ferrule assembly 2 from twisting. At the same time, the anti-twisting ability of the inner frame sleeve 1 in the outer frame sleeve 5 is increased, and the optical fiber docking quality is high, the optical fiber is not easy to shift after docking, and the reliability is high. The inner frame sleeve 1 can be set according to the type of the external optical cable 100. When it is matched with the round optical cable 100, it can be used to fix the round optical cable 100; when it is matched with the flat optical cable 100, it can be used to fix the flat optical cable 100. When the external optical cable 100 is connected to the external optical cable 100, the rear end of the crimping ring 16 is tightly crimped to the external optical cable 100 to fix the external optical cable 100. The crimping ring 16 is made of aluminum material, so it will not break after crimping deformation, and the crimping is firm and reliable.

[0044] The plug assembly 2 includes a hollow stop ring 21 with one end threadedly connected to the inner frame sleeve 1, a hollow fixing seat 22 is buckled on the outer side of the stop ring 21, the stop ring 21 is provided with a buckle protruding outward, and a clamping window is provided on the side of the fixing seat 22, and the fixing seat 22 and the stop ring 21 are clamped with the clamping window. A boss 3 23 is provided inside the fixing seat 22, and a plug element 24 is provided inside the fixing seat 22 to be clamped between the boss 3 23 and the stop ring 21, and the two ends of the plug element 24 extend into the stop ring 21 and the fixing seat 22 respectively, and the stop ring 21 is provided with a spring 25 supporting the plug element 24 at one end facing the plug element 24, and the plug element 24 includes a core seat 241 and a ceramic plug 242 with an interference fit with the core seat 241, and a boss 4 243 is provided on the outer side of the core seat 241, and the boss 4 243 is clamped between the spring 25 and the boss 3 23.

[0045] The ceramic ferrule 242 of the present invention is connected to the core seat 241 by interference fit, and the boss four 243 of the core seat 241 is clamped between the spring 25 and the boss three 23, which limits the installation position of the ferrule element 24, and at the same time makes the ferrule element 24 have a certain mobility between the spring 25 and the boss three 23. Through the elastic force of the spring 25, the internal structure of the SC fiber optic connector of the present invention is more solid and reliable, and a certain buffering effect is provided when the SC fiber optic connector and the SC fiber optic adapter are mated with each other, avoiding damage to the ferrule element 24 caused by the impact force caused by the mating, and the signal stability is good and the service life is long.

[0046] Reference Figures 10 to 16 The present invention also provides an SC type optical fiber adapter for intermate with the SC optical fiber connector of any one of the above claims, comprising a housing 8, a guide seat 81 fixedly installed in the housing 8, a signal needle seat 82 installed in the housing 8, a part of the signal needle seat 82 extending into the guide seat 81, a boss 83 provided on the outside of the housing 8, a nut 9 threadedly connected to the housing 8 is provided at one end of the boss 83 on the outside of the housing 8. A guide seat 87 is provided in the housing 8, the guide seat 87 is provided with a pinhole 871 for assembling the signal needle seat 82, and the guide seat 81 is provided with a pinhole 811 for assembling the signal needle seat 82. When assembling, the signal needle seat 82 is first assembled into the pinhole 871, and then the guide seat 81 is clamped in the housing 8, and at the same time, it is ensured that the signal needle seat 82 is inserted into the pinhole 811, and the assembly is completed. There are few parts and the assembly is convenient and quick. The inner side of the shell is provided with three strip grooves 88 corresponding to the strip ribs 44. When the SC fiber optic connector and the SC fiber optic adapter are mated with each other, the strip ribs 44 must correspond to the corresponding strip grooves 88 for successful mating, which can not only achieve the positioning effect during mating, but also prevent misalignment during mating.

[0047] An SC type optical fiber adapter provided by the present invention also includes a dust cap 10, a gasket 92 with a connecting handle 91 is provided between the boss 83 and the nut 9, the other end of the connecting handle 91 is connected to a fixing ring 714 locked on the dust cap 10, an annular groove 4 84 is provided at one end of the outer side of the shell 8 away from the nut 9, the annular groove 4 84 is provided with an O-ring 4 86, the dust cap is clamped on the outer side of the shell 8 and has an interference fit with the O-ring 4 86, and a dust cap 3 85 is also provided at the other end of the inner side of the shell 8, and the dust cap 3 85 is inserted into the guide seat 1 81.

[0048] The outer side of the housing 8 is provided with a guide groove and a clamping groove at one end of the guide seat 2 87. The dust cap 2 10 slides into the guide groove and then clamps in the clamping groove conveniently and quickly. The O-ring 4 86 is an interference fit between the dust cap 3 85 and the housing 8, which prevents the corrosion of the present invention in a harsh environment, and can prevent water or other impurities such as dust from penetrating, thereby increasing the practical life of the present invention. The dust cap 2 10 is connected with a connecting handle 2 91, which can prevent the dust cap 2 10 from falling off and solve the placement problem when the dust cap 2 10 is not needed.

[0049] By unscrewing the nut 9, the SC fiber optic adapter of the present invention can be inserted into the panel, and the gasket 2 92 can be pressed against the panel. Then, the nut 9 can be tightened to fix the SC fiber optic adapter of the present invention to the panel. The design of the gasket 2 92 can make the SC fiber optic adapter of the present invention and the panel more firmly fixed and prevent debris or water vapor outside the panel from entering the inside of the panel, thereby increasing the life of the present invention.

[0050] Open dust cap 1 7 and dust cap 2 10, insert the SC fiber optic connector of the present invention into the SC fiber optic adapter, insert the ceramic ferrule 242 into the signal pin seat 82, and they can be used interchangeably. If they do not need to be used interchangeably, put dust cap 1 7 and dust cap 2 10 into the outer frame sleeve 5 and the shell 8 respectively.

Claims

1. An SC type optical fiber connector for connecting an external optical cable (100), characterized in that It comprises a hollow inner frame sleeve (1) with an internal threaded hole (11) at one end, a core plug assembly (2) threadedly connected to the inner frame sleeve (1), a stop sleeve (4) arranged on the outside of the core plug assembly (2), a tail sleeve (3) clamped on the outside of one end of the stop sleeve (4), and an outer frame sleeve (5) sleeved on the outside of one end of the internal threaded hole (11) of the inner frame sleeve (1), a part of the outer frame sleeve (5) surrounds the outside of the stop sleeve (4), and another part of the stop sleeve (4) is clamped between the inner frame sleeve (1) and the core plug assembly (2); The outer frame sleeve (5) is hollow inside, a blind hole (51) is provided at one end of the outer frame sleeve (5), the blind hole (51) surrounds the outside of the stop sleeve (4), a stop convex point (52) is provided on the inner wall of the blind hole (51), an inwardly convex retaining ring (53) is provided at the other end of the outer frame sleeve (5), and a stop convex platform (18) corresponding to the retaining ring (53) is provided at one end of the internal threaded hole (11) of the inner frame sleeve (1).

2. An SC type optical fiber connector as claimed in claim 1, characterized in that An annular groove (12) is provided on the outer side of one end of the internal threaded hole (11) of the inner frame sleeve (1), an O-ring (13) is provided in the annular groove (12), and an interference fit is formed between the inner frame sleeve (1) and the outer frame sleeve (5) via the O-ring (13).

3. An SC type optical fiber connector as claimed in claim 1, characterized in that The stop sleeve (4) is in the shape of a hollow cylinder. The bottom of the stop sleeve (4) contacts the end surface of the internal threaded hole (11) of the inner frame sleeve (1). The bottom of the stop sleeve (4) is provided with a boss 1 (41) facing inward. A boss 6 (42) is provided inside the stop sleeve (4) and above the boss 1 (41). The boss 1 (41) is clamped between the inner frame sleeve (1) and the plug assembly (2) to fix the stop sleeve (4). The boss 6 (42) limits the plug assembly (2) from the outside. ), the insert assembly (2) extends into the hollow cavity of the stop sleeve (4), a 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), a boss (43) protruding outwards at one end of the stop sleeve (4) facing the boss (41), a plurality of strip ribs (44) surrounding the surface and having different widths are provided on the outer side of the stop sleeve (4), and a chamfer (45) is provided at one end of the strip rib (44) away from the boss (43).

4. An SC type optical fiber connector as claimed in claim 1, characterized in that A first cavity is formed between the outer frame sleeve (5) and the stop sleeve (4); a dust cap (7) is provided inside the outer frame sleeve (5); the dust cap (7) is provided with a dustproof portion (71) that can be inserted into the first cavity; an annular groove (711) is provided on the outer side of the dustproof portion (71); a waterproof ring (712) is provided on the annular groove (711); a wedge-shaped groove (716) is provided on the outer side of the dustproof portion (71) and located below the annular groove (711); the wedge-shaped groove (716) is provided with an opening flush with the end surface of the dustproof part (71), a stop groove (717) is provided at the upper part of the wedge-shaped groove (716), the dustproof part (71) and the outer frame sleeve (5) are interference-fitted via a waterproof ring (712), the tail of the dustproof cap (7) is locked with a fixing ring (714) with a connecting handle (713), and the other end of the connecting handle (713) is connected with a locking plate (715) arranged between the outer frame sleeve (5) and the tail sleeve (3).

5. The SC type optical fiber connector according to claim 1, characterized in that The inner frame sleeve (1) is provided with an annular groove three (14) on the outside of the end away from the internal threaded hole (11), and the annular groove three (14) is provided with a clamping ring (15). The tail sleeve (3) is clamped on the clamping ring (15). The inner frame sleeve (1) is provided with a crimping ring (16) sleeved on the inner side thereof at the end away from the internal threaded hole (11), and the crimping ring (16) is made of metal.

6. The SC type optical fiber connector according to claim 1, characterized in that The insert assembly (2) comprises a hollow stop ring (21) with one end threadedly connected to the inner frame sleeve (1); a hollow fixing seat (22) is buckled on the outer side of the stop ring (21); a boss three (23) is provided inside the fixing seat (22); a insert element (24) is provided inside the fixing seat (22) and is clamped between the boss three (23) and the stop ring (21); two ends of the insert element (24) extend into the stop ring (21) and the fixing seat (22) respectively; a spring (25) for supporting the insert element (24) is provided at one end of the stop ring (21) facing the insert element (24); the insert element (24) comprises a core seat (241) and a ceramic insert (242) interference-fitted with the core seat (241); a boss four (243) is provided on the outer side of the core seat (241); the boss four (243) is clamped between the spring (25) and the boss three (23).

7. An SC type optical fiber adapter for intermate with the SC type optical fiber connector according to any one of claims 1 to 6, characterized in that The invention comprises a shell (8), a guide seat (81) being fixedly mounted in the shell (8), a signal needle seat (82) being mounted in the shell (8), a portion of the signal needle seat (82) extending into the guide seat (81), a boss (83) being disposed on the outer side of the shell (8), and a nut (9) being threadedly connected to the shell (8) being disposed on one end of the boss (83) on the outer side of the shell (8); A second guide seat (87) is provided in the shell (8), and the second guide seat (87) is provided with a pinhole one (871) for assembling the signal needle seat (82). The first guide seat (81) is provided with a pinhole two (811) for assembling the signal needle seat (82). The assembled signal needle seat (82) is installed in the pinhole one (871) and the pinhole two (811). During assembly, the signal needle seat (82) is first assembled into the pinhole one (871), and then the guide seat one (81) is snapped into the inside of the shell (8), and at the same time, it is ensured that the signal needle seat (82) is inserted into the pinhole two (811), and the assembly is completed. A plurality of strip grooves (88) are provided on the inner side of the shell (8). When the SC optical fiber connector and the SC optical fiber adapter are mated, the strip ribs (44) must correspond to the corresponding strip grooves (88) to successfully mate, which can achieve the positioning effect during mating and prevent misalignment during mating.

8. An SC type optical fiber adapter as claimed in claim 7, characterized in that It also includes a second dust cap (10), a second gasket (92) with a second connecting handle (91) is provided between the fifth boss (83) and the nut (9), the other end of the second connecting handle (91) is connected to a fixing ring (714) locked on the second dust cap (10), an annular groove (84) is provided at one end of the outer side of the shell (8) away from the nut (9), an O-ring (86) is provided in the annular groove (84), the dust cap is clamped on the outer side of the shell (8) and is interference fit with the O-ring (86), and a third dust cap (85) is provided at the other end of the inner side of the shell (8).

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