Optical fiber quick connector

Abstract

The invention relates to the technical field of optical fiber connection, in particular to an optical fiber quick connector which is used in cooperation with an on-site optical fiber, the on-site optical fiber comprises a protective sleeve, a coating layer and a fiber core from outside to inside, and the on-site optical fiber comprises a protective cover, a front installation shell, a dustproof sleeve, an insertion core, an embedded optical fiber, a rear installation shell, a first pressing block, a second pressing block, a clamping spring, a push button and an installation rail. The device further comprises a clamping assembly, a fixing assembly and a clamping assembly. According to the optical fiber quick connector, the clamping spring is clamped through the clamping assembly, and meanwhile, the friction force between the extrusion block and the sliding groove is increased through the counter-acting force of the clamping spring, so that the extrusion block is prevented from deviating from the original position when the connector vibrates and the like, and then the stability of the clamping effect on the clamping spring is guaranteed; and meanwhile, the counter-acting force of the clamp spring on the clamping assembly limits the displacement of the fixing assembly through the push button, so that the limiting and fixing effects of the fixing assembly on the clamping assembly are ensured, and the butting and clamping and fixing effects on the on-site optical fibers are further ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber connection, in particular to an optical fiber quick connector. Background Art

[0002] Fiber optic quick connectors, also known as fiber optic field connectors, precisely connect the two ends of the optical fiber to maximize the coupling of the light energy output by the transmitting fiber to the receiving fiber. Common fiber optic quick connectors include pre-buried types. These types pre-buried fiber optic connectors embed a section of fiber within the connector ferrule. The processed field fiber is then connected to the pre-buried fiber within a V-groove formed within the connector. Matching paste is also applied within the V-groove to enhance the connection between the two.

[0003] The embedded optical fiber connector needs to provide sufficient clamping force on the optical fiber through the V-groove to ensure the end-face connection accuracy of the embedded optical fiber and the on-site optical fiber. Therefore, a retaining spring is provided on the outside of the V-groove. However, since the retaining spring needs to provide a high clamping force for a long time, the retaining spring is in a high stress state for a long time and is prone to fatigue, thereby reducing its elasticity or even breaking, which in turn leads to a weakening of the clamping force on the optical fiber, causing the end-face connection between the embedded optical fiber and the on-site optical fiber to deviate, affecting the transmission effect of the optical signal; in addition, the reduced clamping effect of the V-groove is likely to accelerate the loss rate of the internal matching paste, thereby increasing the insertion loss between the end faces of the embedded optical fiber and the on-site optical fiber, thereby affecting the connection effect of the optical fiber and the transmission effect of the optical signal.

[0004] Therefore, an optical fiber quick connector is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide an optical fiber quick connector, which solves the problem that the retaining spring loses its elasticity after long-term use, resulting in a loss of clamping force on the optical fiber, thereby causing poor optical fiber docking effect, and the matching paste loss rate is accelerated, resulting in increased insertion loss. By setting a clamping component, the retaining spring's clamping effect on the optical fiber is enhanced during normal use while the retaining spring stress is reduced. When the retaining spring's elasticity weakens, the retaining spring is limited to ensure the clamping of the optical fiber. The reverse thrust of the retaining spring on the clamping component is applied to the fixing component to enhance the stability of the on-site optical fiber fixation. The clamping component applies axial clamping force to the on-site optical fiber, so that the position of the on-site optical fiber is adjusted when the matching paste is lost, thereby ensuring the optical fiber docking and signal transmission effect.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An optical fiber quick connector is used in conjunction with an on-site optical fiber. The on-site optical fiber comprises a protective sleeve, a coating layer, and a fiber core from the outside to the inside, including a protective cover, a front mounting shell, a dust cover, a ferrule, a pre-buried optical fiber, a rear mounting shell, a pressure block 1, a pressure block 2, a retaining spring, a push button, and a mounting rail. The connector also includes a clamping assembly, a fixing assembly, and a snap-fit ​​assembly. The clamping assembly is arranged in the rear mounting shell and connected to the push button. The fixing assembly is arranged in the rear mounting shell and connected to the push button. The snap-fit ​​assembly is connected to the mounting rail. The push button is pushed forward to Pressing block 1 and pressing block 2 are stretched apart, and the clamping and fixing effects of the clamping assembly and the fixing assembly are released at the same time. The processed on-site optical fiber is passed through the clamping assembly and extended into between pressing block 1 and pressing block 2 through the mounting rail and then connected to the pre-buried optical fiber. The push button is pushed backward to clamp pressing block 1 and pressing block 2 under the action of the retaining spring, and at the same time drives the clamping assembly to clamp and limit the retaining spring. At the same time, the push button drives the fixing assembly to fix the clamping assembly. The retaining spring generates a reaction force on the clamping assembly and acts on the fixing assembly through the push button.

[0008] During the use of the optical fiber quick connector, the on-site optical fiber must first be processed, and the protective sheath and coating at the front end of the on-site optical fiber must be stripped off. The processed fiber core is then inserted into the V-groove formed between the first and second compression blocks, and docked with the pre-buried optical fiber also located between the first and second compression blocks. The V-groove formed between the first and second compression blocks is filled with matching paste. The matching paste can fill the gap between the pre-buried optical fiber and the end face of the on-site optical fiber and reduce the Fresnel reflection caused by the air gap between the optical fiber end faces. After the on-site optical fiber is docked, the push button is pushed and the nut is tightened, so that the retaining spring clamps the optical fiber in the V-groove and fixes the protective sheath area of ​​the on-site optical fiber through the card cover. However, the retaining spring easily loses its elasticity after long-term use, thereby weakening the clamping force on the optical fiber, which increases the insertion loss. At the same time, as time passes, the matching paste between the optical fibers gradually loses, which increases the air content between the pre-buried optical fiber and the end face of the on-site optical fiber, thereby increasing the generation of Fresnel reflection and affecting the signal transmission quality.

[0009] Through the above scheme, the clamping spring applies a clamping force to the pressure block 1 and the pressure block 2, thereby clamping the optical fiber. At the same time, the clamping assembly limits and applies pressure to the clamping spring, thereby strengthening the clamping effect of the clamping spring and weakening or offsetting the stress by applying pressure in the opposite direction of the force, thereby ensuring the clamping effect of the optical fiber while improving the service life of the clamping spring; when the clamping assembly applies force to the clamping spring, the clamping spring will apply a reaction force to the clamping assembly, thereby making the clamping assembly tightly fit against the inner wall surface of the rear mounting shell, and through the friction between the two, the clamping assembly is prevented from slipping out and losing the clamping effect on the clamping spring when the connector vibrates; since the clamping assembly and the fixing assembly are both connected to the push button, when the clamping assembly cannot move independently, the push button will correspondingly limit the movement of the fixing assembly, thereby ensuring the fixing effect of the fixing assembly on the clamping assembly, thereby ensuring the clamping and fixing effect of the optical fiber protective cover.

[0010] Preferably, the inner walls on the left and right sides of the rear mounting shell are provided with sliding grooves, the sliding grooves are inclined, and the distance between the sliding grooves and the inner wall surface of the rear mounting shell gradually increases from front to back; the clamping assembly includes a fixed tooth plate, a gear, a hinge plate, a hinge rod and an extrusion block, the fixed tooth plate is connected to the lower side of the push button, the gear is connected to the rear mounting shell and meshes with the fixed tooth plate, the hinge plate is connected to the gear, the hinge rod is connected to the hinge plate, one end of the hinge rod is connected to the extrusion block, the extrusion block is slidably connected in the sliding groove, and the side of the extrusion block close to the sliding groove is an inclined surface, and the slope is the same as the slope of the sliding groove.

[0011] With the above solution, when installing the on-site optical fiber, you first need to push the push button forward, and use the push button to squeeze a certain gap between the pressure block 1 and the pressure block 2. At this time, the core of the on-site optical fiber is inserted into the V-groove formed between the two. At this time, the squeezing block moves backward under the action of the push button, and the squeezing block does not exert squeezing force on the clamping spring. When the optical fiber is connected and needs to be clamped and fixed, first push the push button backward to leave between the pressure block 1 and the pressure block 2. At this time, the pressure block 1 and the pressure block 2 are close to each other under the action of the clamping spring and clamp the optical fiber. At the same time, the movement of the push button It will drive the extrusion block to move forward along the slide groove and gradually approach the direction of the retaining spring, thereby clamping the retaining spring. The force exerted by the extrusion block on the retaining spring offsets the force exerted by pressure blocks one and two on the retaining spring, thereby reducing the stress on the retaining spring and improving the service life of the retaining spring. At the same time, the reaction force of the retaining spring on the extrusion block enables the extrusion block to increase the friction between the extrusion block and the slide groove, thereby avoiding the problem that the extrusion block slides autonomously and deviates from its original position when the connector vibrates, ensuring the use effect of the retaining spring and then ensuring the clamping and fixing effect of the optical fiber.

[0012] Preferably, the thickness of the extrusion block in the horizontal direction gradually decreases from front to back, and the front end of the extrusion block on one side of the inclined surface is provided with an arc chamfer.

[0013] Through the above scheme, the side of the extrusion block close to the retaining spring is set parallel to the surface of the retaining spring, so that it can be more smoothly close to the retaining spring, while ensuring the contact area between the extrusion block and the retaining spring. Setting an arc chamfer at the front end of the extrusion block can reduce the friction of the extrusion block when it moves forward, so that it can be more smoothly inserted into the gap between the retaining spring surface and the inner wall surface of the rear mounting shell through the slide groove, thereby applying clamping force to the retaining spring.

[0014] Preferably, the fixing assembly includes a fixing plate 1, a threaded rod, a fixing plate 2, a worm, a fixing ring and a rack, the fixing plate 1 is connected to the push button, the threaded rod is connected to the fixing plate 1, the fixing plate 2 is connected to the rear mounting shell, the worm is rotatably connected to the fixing plate 2, the fixing ring is slidably connected to the mounting rail, the rack is arranged on the fixing ring and engages with the worm, a rotary groove with an opening facing forward is provided in the worm, and the threaded rod is connected to the rotary groove; the length of the worm is less than the length of the fixing ring, the secondary friction coefficient of the rack is 0.7, and the lead angle of the worm is less than 4°.

[0015] Through the above scheme, when the push button is pushed backward, the worm will rotate through the threaded rod, and the rotation of the worm will drive the fixing ring to move backward through the rack engaged with it, thereby causing the fixing ring to limit and fix the clamping assembly, so that the clamping assembly can clamp the protective cover of the optical fiber on site. By setting the lead angle of the worm and the friction coefficient of the rack pair, a self-locking structure is formed. Therefore, when the worm is not driven, the fixing ring will be restricted to the specified position, thereby ensuring the limiting and fixing effect of the clamping assembly.

[0016] Preferably, the length of the threaded rod is greater than the length of the worm, and the thread pitch of the threaded rod is greater than 1.25 mm.

[0017] Through the above scheme, the threaded rod moves backward with the push button, and then drives the worm to rotate through the thread. However, under normal circumstances, driving the worm in this way will encounter great resistance. Therefore, the threaded rod is set to a spiral sheet structure with a large thread pitch, with reference to the children's toy called "Hand-Push Flying Fairy", so that it can cooperate with the rotary groove to drive the screw to rotate with less resistance; referring to the special setting of the above-mentioned children's toy, the central axis of the threaded rod in this scheme is not at the center of the worm, so the threaded rod can be set to be able to move in a small range on the fixed plate, thereby ensuring the driving ability of the threaded rod to the worm.

[0018] Preferably, an installation groove is provided inside the rear side of the installation rail. The clamping component includes a fixed clamping cover, a movable clamping cover, clamping plates, a fixed block, and a movable block. The fixed clamping cover and the movable clamping cover are both provided at the rear end of the installation rail. A plurality of the clamping plates are respectively connected to the fixed clamping cover and the movable clamping cover. The fixed clamping cover is fixedly connected to the installation rail. The movable block is slidably connected in the installation groove. The fixed block is hingedly connected to the movable block. The fixed block is connected to the clamping plate on the movable clamping cover. The outer sides of the fixed clamping cover and the movable clamping cover are both arc-shaped and have a radius value equal to the inner diameter value of the fixed ring. A gap is left between the fixed clamping cover and the movable clamping cover. The installation groove is divided into two ends. The first half is inclined and the second half is horizontal. The included angle between the first half of the installation groove and the horizontal plane is greater than 45°.

[0019] Through the above solution, the movable clamping cover can move along the installation groove through the fixed block and the movable block. The shape of the installation groove is similar to the shape of "厂". When clamping the protective sleeve of the on-site optical fiber, the movable clamping cover will move along the movement track of the installation groove, causing the movable clamping cover to tilt and approach the protective sleeve. Then, when contacting the protective sleeve, it will give a certain forward thrust to it, causing the fiber core that has not entered the installation rail to bend slightly. Then, when the matching paste volatilizes and causes a gap between the end faces of the pre-buried optical fiber and the on-site optical fiber, the bent fiber core at the rear end will straighten, filling the gap caused by the volatilization of the matching paste, ensuring the connection effect between the pre-buried optical fiber and the on-site optical fiber, and thus ensuring the signal transmission effect.

[0020] Preferably, the clamping plate is provided with missing teeth, and the missing teeth are flat.

[0021] Through the above solution, the clamping plates on the fixed clamping cover and the movable clamping cover are arranged oppositely, and the clamping plates installed on the inner circles of the two are also corresponding to each other. The missing teeth between the upper and lower clamping plates form a rounded rectangular shape, which can flatten the protective sleeve, and then clamp the protective sleeve tightly. At the same time, the plurality of clamping plates increase the contact area with the protective sleeve, thereby enhancing the tensile strength of the optical fiber and avoiding the problem that the connector is affected in butt joint quality when being pulled under non-standard wiring.

[0022] Preferably, fixed baffles are provided on the outer sides of the fixed clamping cover and the movable clamping cover. A spring piece is connected to the front end of the fixed baffle, and a movable baffle is connected to the front end of the spring piece.

[0023] Through the above solution, the movable baffle is pushed forward by the spring piece. When the fixed ring is sleeved on the outer circles of the movable clamping cover and the fixed clamping cover to limit and fix them, the fixed ring will squeeze the movable baffle on the surface of the fixed baffle. At this time, the movable baffle will give a forward reaction force to the fixed ring under the action of the spring piece, making the teeth on the rack and the worm fit more tightly, thereby increasing the friction force and enhancing the self-locking effect of the fixed ring, and thus ensuring the clamping and fixing effect on the protective sleeve of the on-site optical fiber.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. An optical fiber quick connector of the present invention clamps the retaining spring through a clamping assembly, and at the same time, increases the friction between the extrusion block and the slide groove through the reaction force of the retaining spring, thereby preventing the extrusion block from deviating from its original position when the connector vibrates, etc., thereby ensuring the stability of the retaining spring clamping effect. At the same time, the reaction force of the retaining spring on the clamping assembly will limit the displacement of the fixing assembly through the push button, thereby ensuring the limiting and fixing effect of the fixing assembly on the engaging assembly, thereby ensuring the docking and clamping and fixing effect of the on-site optical fiber.

[0026] 2. An optical fiber quick connector of the present invention is provided with a movable card cover and an installation groove. In the process of fixing the on-site optical fiber, the movable card cover will move forward along the shape of the installation groove while clamping the on-site optical fiber downward, thereby giving the on-site optical fiber a forward axial thrust during the clamping process, thereby slightly bending the fiber core that has not entered the installation rail. When the matching paste is lost and a gap appears between the on-site optical fiber and the end face of the pre-buried optical fiber, the bent fiber core part automatically straightens under the action of elastic force, thereby causing the front end of the fiber core to move forward to fill the gap caused by the loss of matching paste, thereby ensuring the docking effect of the on-site optical fiber and the pre-buried optical fiber.

[0027] 3. An optical fiber quick connector of the present invention is provided with a fixed ring and a movable baffle. When the fixed ring moves backward under the action of the worm and the rack to fix the movable card cover and the fixed card cover, the fixed ring will squeeze the movable baffle backward. At this time, the spring sheet will bring a forward force to the fixed ring through the movable baffle, so that the fixed ring drives the rack to generate a forward movement trend, and then the rack and the worm are closely fitted to increase friction, thereby improving the self-locking effect of the worm and the rack, thereby ensuring the fixing effect of the on-site optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of the field optical fiber of the present invention;

[0029] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the clamping assembly of the present invention;

[0031] Figure 4 It is a planar schematic diagram of the cooperation between the extrusion block and the slide groove of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the fixing assembly of the present invention;

[0033] Figure 6 For the present invention Figure 5A magnified view of point A;

[0034] Figure 7 It is a partial cross-sectional view of the cooperation between the worm and the threaded rod of the present invention;

[0035] Figure 8 This is a state diagram of the movable card cover of the present invention in the engaged state;

[0036] Figure 9 This is a state diagram of the movable card cover of the present invention in an open state;

[0037] Figure 10 It is a structural schematic diagram of the splint of the present invention.

[0038] Figure: 1. On-site optical fiber; 2. Protective cover; 3. Front mounting housing; 4. Dust cover; 5. Ferrule; 6. Embedded optical fiber; 7. Rear mounting housing; 8. Pressure block 1; 9. Pressure block 2; 10. Circlip; 11. Push button; 12. Mounting rail; 13. Clamping assembly; 1301. Fixed tooth plate; 1302. Gear; 1303. Hinge plate; 1304. Hinge rod; 1305. Extrusion block; 14. Fixing assembly; 1401. Fixing plate 1; 1402, threaded rod; 1403, fixed plate 2; 1404, worm; 1405, fixed ring; 1406, rack; 1407, rotary groove; 15, locking assembly; 1501, fixed card cover; 1502, movable card cover; 1503, splint; 1504, fixed block; 1505, movable block; 1506, missing teeth; 16, slide groove; 17, mounting groove; 18, fixed baffle; 19, spring sheet; 20, movable baffle. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figures 1 to 10 The present invention provides an optical fiber quick connector, the technical solution is as follows:

[0041] For details, please refer to Figures 1 to 4, an optical fiber quick connector, used with a field optical fiber 1, the field optical fiber 1 is respectively a protective cover, a coating layer and a fiber core from the outside to the inside, in the process of docking the optical fibers, mainly to allow the two fiber cores to dock, including a protective cover 2, a front mounting shell 3, a dust cover 4, a ferrule 5, a pre-buried optical fiber 6, a rear mounting shell 7, a pressure block 8, a pressure block 2 9, a retaining spring 10, a push button 11 and a mounting rail 12, the protective cover 2 is connected to the front mounting shell 3 and is sleeved on the outside of the front mounting shell 3, the ferrule 5 is connected to the front end of the front mounting shell 3, the dust cover 4 is connected to the front end of the front mounting shell 3 and is sleeved on the outside of the ferrule 5, the pre-buried optical The fiber 6 is arranged inside the ferrule 5, the rear mounting shell 7 is fixed to the rear end of the front mounting shell 3, the clamping spring 10 is arranged in the rear mounting shell 7, the pressure block 1 8 and the pressure block 2 9 are arranged in the clamping spring 10, and a V-shaped groove is formed between the pressure block 1 8 and the pressure block 2 9. The push button 11 is slidably connected to the rear mounting shell 7, and the mounting rail 12 is connected to the rear mounting shell 7. A guide groove capable of accommodating the passage of the fiber core is provided in the middle of the mounting rail 12, and the guide groove can be connected to the V-shaped groove formed between the pressure block 1 8 and the pressure block 2 9. When clamping the optical fiber, the clamping force is applied to the pressure block 1 8 and the pressure block 2 9 by the clamping spring 10, thereby clamping the optical fiber;

[0042] The clamping assembly 13 is provided in the rear mounting shell 7 and is connected to the push button 11. The clamping assembly 13 limits and applies pressure to the clamping spring 10, thereby strengthening the clamping effect of the clamping spring 10 and weakening or offsetting the stress by applying pressure in the opposite direction of the force, thereby ensuring the clamping effect of the optical fiber and improving the service life of the clamping spring 10; the fixing assembly 14 is provided in the rear mounting shell 7 and is connected to the push button 11. When the clamping assembly 13 applies force to the clamping spring 10, the clamping spring 10 will apply a reaction force to the clamping assembly 13, and accordingly, the movement of the fixing assembly 14 will be limited by the push button 11, thereby ensuring the fixing effect of the fixing assembly 14 on the clamping assembly 15, thereby ensuring the clamping and fixing effect of the optical fiber protective cover;

[0043] The inner walls on the left and right sides of the rear mounting shell 7 are provided with sliding grooves 16; the clamping assembly 13 includes a fixed tooth plate 1301, a gear 1302, a hinge plate 1303, a hinge rod 1304 and an extrusion block 1305, the fixed tooth plate 1301 is connected to the lower side of the push button 11, the gear 1302 is connected to the rear mounting shell 7 and meshes with the fixed tooth plate 1301, the hinge plate 1303 is connected to the gear 1302, the hinge rod 1304 is connected to the hinge plate 1303, one end of the hinge rod 1304 is connected to the extrusion block 1305, and the extrusion block 1305 slides Connected in the slide groove 16, when the push button 11 moves backward, it drives the extrusion block 1305 to move forward along the slide groove 16, and gradually approaches the direction of the clamping spring 10, thereby clamping the clamping spring 10. The force exerted by the extrusion block 1305 on the clamping spring 10 offsets the force exerted by the pressure block 1 8 and the pressure block 2 9 on the clamping spring 10, thereby reducing the stress on the clamping spring 10 and improving the service life of the clamping spring 10. At the same time, the reaction force of the clamping spring 10 on the extrusion block 1305 enables the extrusion block 1305 to increase the friction between the slide groove 16, thereby preventing the extrusion block 1305 from deviating from the original position;

[0044] The slide groove 16 is set at an angle, and the distance between the slide groove 16 and the inner wall surface of the rear mounting shell 7 gradually increases from front to back. The side of the extrusion block 1305 close to the slide groove 16 is an inclined surface, and the slope is the same as the slope of the slide groove 16, so that the side of the extrusion block 1305 close to the retaining spring 10 is set parallel to the surface of the retaining spring 10, so that it can be more smoothly close to the retaining spring 10, while ensuring the contact area between the extrusion block 1305 and the retaining spring 10. The thickness of the extrusion block 1305 in the horizontal direction gradually decreases from front to back, and the front end of the extrusion block 1305 on the side of the inclined surface is provided with an arc chamfer, which can reduce the friction of the extrusion block 1305 when moving forward, so that it can be more smoothly inserted into the gap between the surface of the retaining spring 10 and the inner wall surface of the rear mounting shell 7 through the slide groove 16, thereby applying a clamping force to the retaining spring 10.

[0045] like Figures 5 to 7As shown, the fixing assembly 14 includes a fixing plate 1401, a threaded rod 1402, a fixing plate 2 1403, a worm 1404, a fixing ring 1405 and a rack 1406. The fixing plate 1401 is connected to the push button 11, and the threaded rod 1402 is connected to the fixing plate 1401. The length of the threaded rod 1402 is greater than the length of the worm 1404. The thread pitch of the threaded rod 1402 is greater than 1.25 mm. By increasing the thread pitch of the threaded rod 1402, the resistance of the threaded rod 1402 in the rotating groove 1407 is reduced, and the central axis of the threaded rod 1402 is not at the center of the circle of the worm 1404. Therefore, the threaded rod 1402 is set to be able to move in a small range on the fixing plate 1401, thereby ensuring the driving ability of the threaded rod 1402 to the worm 1404. The fixing plate 2 1403 is fixedly connected to the rear mounting shell 7, and the worm 1404 rotates Connected to the second fixing plate 1403, the fixing ring 1405 is slidably connected to the mounting rail 12, the inner ring diameter of the fixing ring 1405 is the same as the diameter of the mounting rail 12, the rack 1406 is arranged on the fixing ring 1405 and meshes with the worm 1404, the length of the worm 1404 is less than the length of the fixing ring 1405, the secondary friction coefficient of the rack 1406 is 0.7, and the lead angle of the worm 1404 is less than 4°. By setting the lead angle of the worm 1404 and the secondary friction coefficient of the rack 1406, a self-locking structure is formed. Therefore, when the worm 1404 is not driven, the fixing ring 1405 will be restricted to the specified position, thereby ensuring the limiting and fixing effect of the locking assembly 15, the worm 1404 is provided with a rotary groove 1407 with an opening facing forward, the threaded rod 1402 is connected to the rotary groove 1407, and the opening of the rotary groove 1407 is square.

[0046] like Figures 8 to 10 As shown, the clamping assembly 15 is connected to the mounting rail 12, and the mounting rail 12 is cylindrical. A mounting groove 17 is provided inside the rear side of the mounting rail 12. The mounting groove 17 is divided into two ends, the front half is inclined, and the rear half is horizontal. The angle between the front half of the mounting groove 17 and the horizontal plane is greater than 45 degrees. The shape of the mounting groove 17 is similar to the shape of a "factory". When the protective cover of the on-site optical fiber 1 is clamped, the movable clamping cover 1502 will move along the moving trajectory of the mounting groove 17, so that it gives it a certain forward thrust when it contacts the protective cover, thereby slightly bending the fiber core that has not entered the mounting rail 12. When the matching paste is lost and a gap appears between the end face of the on-site optical fiber 1 and the embedded optical fiber 6, the bent fiber core part automatically straightens under the action of the elastic force, thereby causing the front fiber core to move forward to fill the vacancy caused by the loss of matching paste, thereby ensuring the docking effect of the on-site optical fiber 1 and the embedded optical fiber 6, thereby ensuring the signal transmission effect;

[0047] The clamping assembly 15 includes a fixed card cover 1501, a movable card cover 1502, a splint 1503, a fixed block 1504 and a movable block 1505. The outer sides of the fixed card cover 1501 and the movable card cover 1502 are both arc-shaped and the radius value is the same as the inner diameter value of the fixed ring 1405. A gap is left between the fixed card cover 1501 and the movable card cover 1502. The fixed card cover 1501 and the movable card cover 1502 are both arranged at the rear end of the mounting rail 12. The multiple splints 1503 are respectively connected to the fixed card cover 1501 and the movable card cover 1502. The fixed card cover 1501 is connected to the movable card cover 1502. The clamping plate 1503 is provided with a missing tooth 1506. The missing tooth 1506 is flat. The missing tooth 1506 between the upper and lower clamping plates 1503 forms a rounded rectangular shape, which can flatten the protective cover and thus compress the protective cover. At the same time, the multiple clamping plates 1503 increase the contact area with the protective cover, thereby improving the tensile strength of the optical fiber, preventing the connector from being pulled when the wiring is not standardized, which may affect the docking quality.

[0048] The fixed card cover 1501 is fixedly connected to the mounting rail 12, and the fixed card cover 1501 and the movable card cover 1502 are both provided with a fixed baffle 18 on the outside, and the front end of the fixed baffle 18 is connected to a spring sheet 19, which can be folded and has high elasticity, and the front end of the spring sheet 19 is connected to a movable baffle 20. When the fixed ring 1405 sleeve squeezes the movable baffle 20, the movable baffle 20 will give the fixed ring 1405 a forward reaction force under the action of the spring sheet 19, so that the rack 1406 and the teeth on the worm 1404 fit more closely, thereby increasing the friction and improving the self-locking effect of the fixed ring 1405; the movable block 1505 is slidably connected in the mounting groove 17, and the fixed block 1504 is hingedly connected to the movable block 1505, and the fixed block 1504 is connected to the splint 1503 on the movable card cover 1502, and both the movable block 1505 and the fixed block 1504 can slide in the mounting groove 17.

[0049] The specific working principle is: in the preparation stage before use, for the on-site optical fiber 1, it is necessary to first strip off the outermost protective cover, then strip off the inner coating layer, and finally use a special cutter to fix the fiber core to a fixed length and process the end face of the fiber core; for the optical fiber quick connector, first remove the protective cover 2, then push the push button 11 forward, and then use the push button 11 to open a certain gap between the pressure block 1 8 and the pressure block 2 9, so as to facilitate the insertion of the fiber core of the on-site optical fiber 1; while pushing the push button 11 forward, the fixing component 14 will release the fixation of the clamping component 15, and then the clamping component 15 will be opened, and the installation of the on-site optical fiber 1 can begin.

[0050] When the optical fiber quick connector is installed on the field optical fiber 1, the optical fiber core is first passed through the mounting rail 12 and then inserted into the V-groove formed between the pressing block 1 8 and the pressing block 2 9. After the optical fiber core of the field optical fiber 1 is connected to the pre-buried optical fiber 6, the movable card cover 1502 is first turned over and covered on the protective cover of the field optical fiber 1. In this process, due to the inclined setting of the front end of the mounting groove 17, the moving trajectory of the movable card cover 1502 is relatively inclined with the axial direction of the field optical fiber 1. Therefore, the movable card cover 1502 will move forward in the process of approaching the protective cover, and then in the process of contacting and pressing the protective cover, it gives the protective cover a forward thrust, causing the optical fiber core left behind the mounting rail 12 to bend slightly. When there is a gap at the front end of the optical fiber core, the extension distance of the front end optical fiber core is extended by straightening the rear end optical fiber core, thereby automatically filling the gap between the end face of the field optical fiber 1 and the pre-buried optical fiber 6.

[0051] Then push the push button 11 backward so that the push button 11 moves out from between the pressure block 1 8 and the pressure block 2 9. At this time, under the action of the clamping spring 10, the pressure block 1 8 and the pressure block 2 9 are tightly fitted together, thereby clamping and fixing the fiber core therein;

[0052] At the same time, when the push button 11 moves backward, the extrusion block 1305 is driven forward by the transmission action of the fixed tooth plate 1301, the gear 1302, the hinge plate 1303 and the hinge rod 1304. Since the extrusion block 1305 is connected to the chute 16, and the chute 16 is inclined, Figure 4 , the extrusion block 1305 will also continue to approach the clamping spring 10 during the forward movement, thereby producing a clamping effect on the clamping spring 10, thereby enhancing the clamping effect on the fiber core;

[0053] During the backward movement of the push button 11, the threaded rod 1402 is driven to move backward through the fixed plate 1401, thereby driving the worm 1404 to rotate through the threaded rod 1402. When the worm 1404 rotates, the fixed ring 1405 is driven to move backward through the rack 1406, and then the fixed ring 1405 is moved to the connection between the movable card cover 1502 and the mounting rail 12, and then the movable card cover 1502 is limited and fixed, and then the protective cover of the on-site optical fiber 1 is clamped and fixed through the movable card cover 1502 and the fixed card cover 1501; finally, the protective cover 2 is put on.

[0054] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An optical fiber quick connector, used in conjunction with an on-site optical fiber (1), comprising a pre-buried optical fiber (6), a rear mounting shell (7), a first pressing block (8), a second pressing block (9), a retaining spring (10), a push button (11) and a mounting rail (12), characterized in that: The invention also comprises a clamping assembly (13), a fixing assembly (14) and a snap-fit ​​assembly (15), wherein the clamping assembly (13) is arranged in the rear installation shell (7) and connected to the push button (11), the fixing assembly (14) is arranged in the rear installation shell (7) and connected to the push button (11), and the snap-fit ​​assembly (15) is connected to the installation rail (12). The push button (11) is pushed forward to spread the first pressing block (8) and the second pressing block (9), and at the same time releases the clamping and fixing effects of the clamping assembly (13) and the fixing assembly (14), so that the processed on-site optical fiber (1) passes through the The engaging assembly (15) extends through the mounting rail (12) into between the first pressing block (8) and the second pressing block (9) and is then connected to the pre-buried optical fiber (6). The push button (11) is pushed backwards so that the first pressing block (8) and the second pressing block (9) are clamped under the action of the clamping spring (10), and at the same time, the clamping assembly (13) is driven to clamp and limit the clamping spring (10). At the same time, the push button (11) drives the fixing assembly (14) to fix the engaging assembly (15). The clamping spring (10) generates a reaction force on the clamping assembly (13) and acts on the fixing assembly (14) through the push button (11).

2. The optical fiber quick connector according to claim 1, characterized in that: The inner walls of the left and right sides of the rear mounting shell (7) are provided with slide grooves (16), the slide grooves (16) are arranged obliquely, and the distance between the slide grooves (16) and the inner wall surface of the rear mounting shell (7) gradually increases from front to back; the clamping assembly (13) comprises a fixed tooth plate (1301), a gear (1302), a hinge plate (1303), a hinge rod (1304) and an extrusion block (1305), the fixed tooth plate (1301) is connected to the lower side of the push button (11), the gear (1302) is connected to the lower side of the push button (11), and the gear (1302) is connected to the lower side of the push button (11). ) is connected to the rear mounting shell (7) and meshed with the fixed tooth plate (1301), the hinge plate (1303) is connected to the gear (1302), the hinge rod (1304) is connected to the hinge plate (1303), one end of the hinge rod (1304) is connected to the extrusion block (1305), the extrusion block (1305) is slidably connected in the slide groove (16), and the side of the extrusion block (1305) close to the slide groove (16) is an inclined surface, and the slope is the same as the slope of the slide groove (16).

3. The optical fiber quick connector according to claim 2, characterized in that: The thickness of the extrusion block (1305) in the horizontal direction gradually decreases from front to back, and the front end of the extrusion block (1305) located on one side of the inclined surface is provided with an arc chamfer.

4. The optical fiber quick connector according to claim 1, characterized in that: The fixing assembly (14) comprises a fixing plate (1401), a threaded rod (1402), a fixing plate (1403), a worm (1404), a fixing ring (1405) and a rack (1406); the fixing plate (1401) is connected to the push button (11); the threaded rod (1402) is connected to the fixing plate (1401); the fixing plate (1403) is connected to the rear mounting shell (7); the worm (1404) is rotatably connected to the fixing plate (1403); the fixing ring (1405) is slidably connected to the mounting rail (12); the rack (1406) is arranged on the fixing ring (1405) and meshes with the worm (1404); a rotation groove (1407) with an opening facing forward is provided in the worm (1404); the threaded rod (1402) is connected to the rotation groove (1407).

5. The optical fiber quick connector according to claim 4, characterized in that: The length of the threaded rod (1402) is greater than the length of the worm (1404), and the thread pitch of the threaded rod (1402) is greater than 1.25 mm.

6. The optical fiber quick connector according to claim 4, characterized in that: The length of the worm (1404) is smaller than the length of the fixing ring (1405), the secondary friction coefficient of the rack (1406) is 0.7, and the lead angle of the worm (1404) is smaller than 4°.

7. The optical fiber quick connector according to claim 4, characterized in that: The rear side of the mounting rail (12) is provided with a mounting groove (17), the clamping assembly (15) comprises a fixed card cover (1501), a movable card cover (1502), a clamping plate (1503), a fixed block (1504) and a movable block (1505), the fixed card cover (1501) and the movable card cover (1502) are both arranged at the rear end of the mounting rail (12), a plurality of clamping plates (1503) are respectively connected to the fixed card cover (1501) and the movable card cover (1502), the fixed card cover (1501) and the mounting rail (12) are respectively connected to the fixed card cover (1501) and the movable card cover (1502), and the fixed card cover (1501) and the mounting rail (12) are respectively connected to the fixed card cover (1501) and the movable card cover (1502). The movable block (1505) is slidably connected to the mounting rail (12); the fixed block (1504) is hingedly connected to the movable block (1505); the fixed block (1504) is connected to the clamping plate (1503) on the movable card cover (1502); the outer sides of the fixed card cover (1501) and the movable card cover (1502) are both arc-shaped and have a radius value that is the same as the inner diameter value of the fixed ring (1405); and a gap is left between the fixed card cover (1501) and the movable card cover (1502).

8. The optical fiber quick connector according to claim 7, characterized in that: The installation groove (17) is divided into two ends, the front half is inclined, and the rear half is horizontally arranged, and the angle between the front half of the installation groove (17) and the horizontal plane is greater than 45°.

9. The optical fiber quick connector according to claim 7, characterized in that: The clamping plate (1503) is provided with a missing tooth (1506), and the missing tooth (1506) is flat.

10. The optical fiber quick connector according to claim 8, characterized in that: A fixed baffle (18) is provided on the outside of the fixed card cover (1501) and the movable card cover (1502), the front end of the fixed baffle (18) is connected to a spring sheet (19), and the front end of the spring sheet (19) is connected to a movable baffle (20).

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