CN117761832A - Optical fiber cutter with tension - Google Patents

Abstract

The invention discloses a tension polarization-maintaining optical fiber cutting knife, which comprises a cutting knife main body, a cutting knife cover body, an optical fiber clamp mounting base, a linkage assembly, a fiber pressing cover body and a limiting V groove, wherein: the optical fiber clamp mounting base is movably arranged in the accommodating groove on the left side of the cutting knife main body, the linkage assembly is fixed on the side surface of the cutting knife cover body, which is close to the optical fiber clamp mounting base, and the inner side of the upper surface of the optical fiber clamp mounting base, and when the cutting knife cover body is closed, the cutting knife cover body drives the optical fiber clamp mounting base to move; the limiting V-shaped groove is fixed on the right side of the cutting knife main body, an optical fiber pressing block is movably arranged in the fiber pressing cover body, and when the fiber pressing cover body is closed, the optical fiber pressing block is in contact fit with the limiting V-shaped groove and presses the optical fiber under constant pressure. The invention can effectively improve the repeatability of the clamping of the optical fiber and can simultaneously meet the cutting requirements of common optical fibers and small-diameter optical fibers.

Description

Optical fiber cutter with tension

Technical Field

The invention relates to an optical fiber cutting knife, in particular to an optical fiber cutting knife with tension.

Background

In the application fields of optical fiber fusion welding, optical fiber device coupling packaging and the like, the optical fiber is subjected to high-quality cutting, and the end face of the optical fiber with small cutting angle and no crack is formed, and is generally realized by a special optical fiber cutter.

Basic principle of optical fiber cutter: the blade with ultra-high hardness and ultra-high strength is utilized, the blade and the side surface of the optical fiber are slightly and quickly touched to form an initial scratch in a mechanical cutting mode, and then the optical fiber is quickly bent from the direction opposite to the initial scratch by utilizing a rubber anvil block, so that the scratch is expanded to trigger the optical fiber to break, and the optical fiber cutting is realized.

In order to achieve high quality stable cutting, the requirements are:

the optical fiber is in a straight state and is perpendicular to the cutting direction of the blade; when the blade is cut, the optical fibers at the two sides are clamped, and the optical fibers are not drawn out; when the blade is used for cutting, the tension of the optical fiber is constant; the cutting depth of the blade is proper and stable; the blade dicing speed is appropriate and stable.

Based on the cutting principle and the cutting requirement, each company develops a series of manual, semi-automatic or full-automatic zero-tension optical fiber cutting knives, the zero-tension scheme has low equipment complexity and convenient operation, and can basically meet the cutting requirement of most commercial optical fibers in the market, because the diameter of the cladding of the commercial optical fibers in the market is generally more than or equal to 80 microns, the optical fibers have enough rigidity to keep relatively straight, relatively stable repeated optical fiber clamping can be performed, and relatively stable repeated optical fiber cutting is realized. However, with the development of optical fiber technology, small diameter optical fibers with cladding diameters of 60 micrometers and 40 micrometers have been developed and developed for engineering applications, and have been developed toward smaller dimensions. Because the diameter of the small-diameter optical fiber is small, the rigidity is low, the optical fiber is difficult to realize natural, straight and repeated clamping, and the zero-tension cutting scheme is difficult to meet the cutting requirement.

Disclosure of Invention

The invention aims to provide a fiber cutter with tension, which improves the cutting quality of common-diameter optical fibers on one hand and solves the cutting problem of small-diameter optical fibers on the other hand.

In order to realize the tasks, the invention adopts the following technical scheme:

the utility model provides a take tension polarization-preserving fiber cutter, includes cutting knife main part, cutting knife lid, optic fibre anchor clamps installation base, linkage subassembly, presses fine lid and spacing V groove, wherein:

the optical fiber clamp mounting base is movably arranged in the accommodating groove on the left side of the cutting knife main body, the linkage assembly is fixed on the side surface of the cutting knife cover body, which is close to the optical fiber clamp mounting base, and the inner side of the upper surface of the optical fiber clamp mounting base, and when the cutting knife cover body is closed, the cutting knife cover body drives the optical fiber clamp mounting base to move; the limiting V-shaped groove is fixed on the right side of the cutting knife main body, an optical fiber pressing block is movably arranged in the fiber pressing cover body, and when the fiber pressing cover body is closed, the optical fiber pressing block is in contact fit with the limiting V-shaped groove and presses the optical fiber under constant pressure.

Further, the cutter cover body comprises a cutter cover body, a cutter cover body pivoting assembly, a first magnet and a second magnet, wherein:

the cutter cover body is connected with the cutter body through a cutter cover body pivoting assembly, the cutter cover body can be opened and closed around the cutter cover body pivoting assembly, a first magnet is arranged at the bottom of the front side of the cutter cover body, and a second magnet with opposite magnetic poles is arranged at the opposite position of the cutter body; when the cutting knife cover body is closed, the magnet I and the magnet II are close to each other to generate attractive force, so that the clamping device is used for clamping two sides of an optical fiber to be cut on one hand and pushing the linkage assembly to move on the other hand; the side of cutting knife lid main part near optic fibre anchor clamps installation base is provided with a bar recess for wedge kicking block in the installation linkage subassembly, bar recess width is greater than wedge kicking block width.

Further, the optical fiber clamp mounting base comprises a linear guide rail base, a linear guide rail sliding block, an optical fiber clamp adapting plate, a resistance spring positioning pin, a resistance spring baffle plate, an optical fiber clamp positioning pin and an optical fiber clamp adsorption magnet III, wherein:

the linear guide rail I base is fixed at the bottom of a containing groove arranged on the upper side of the cutting knife main body, the optical fiber clamp adapting plate is fixed on the linear guide rail I sliding block, a circular deep hole I is arranged in the middle of the left side of the optical fiber clamp adapting plate, the resistance spring is arranged in the circular deep hole I, one side of the resistance spring locating pin is fixed on the resistance spring baffle, the resistance spring baffle is fixed on the left side of the cutting knife main body, the other side of the resistance spring locating pin penetrates through the resistance spring and stretches into the circular deep hole I on the left side of the optical fiber clamp adapting plate, the two optical fiber clamp locating pins are vertically fixed on the upper side of the optical fiber clamp adapting plate, and the optical fiber clamp adsorption magnet III is arranged in the containing groove arranged on the upper side of the optical fiber clamp adapting plate; the resistance spring is always in a compressed state, one side of the resistance spring is contacted with the resistance spring baffle plate, the other side of the resistance spring is contacted with the bottom of the deep round hole on the left side of the optical fiber clamp adapting plate, and under the action of the elasticity of the resistance spring, the linear guide rail and the optical fiber clamp adapting plate assembly on the linear guide rail slide block tend to move in the direction away from the resistance spring baffle plate.

Further, when the cutter cover body is opened, the right side of the optical fiber clamp adapting plate is contacted with the right side wall of the accommodating groove of the cutter main body under the action force of the resistance spring, or the right side wall of the transmission supporting rod is contacted with the right side wall of the accommodating groove of the cutter main body for accommodating the transmission supporting rod; when the cutter cover body is closed, under the action of the linkage assembly, the linear guide rail, the sliding block and the optical fiber clamp adapting plate on the linear guide rail move towards the direction approaching to the resistance spring baffle plate against the elasticity of the resistance spring; in addition, in the moving stroke of the first sliding block of the linear guide rail, the resistance spring positioning pin is not contacted with the bottom of the deep round hole on the left side of the optical fiber clamp adapting plate; the optical fiber clamp adapting plate is connected with the first linear guide rail in a kidney-shaped hole screw fixing mode with the installation position adjustable, and is used for adjusting the position of the optical fiber clamp to realize fixed-length cutting.

Further, the linkage assembly includes wedge-shaped ejector blocks, drive struts, miniature bearings and miniature bearing fixing pins, wherein:

the wedge-shaped ejector block is fixedly connected to the side surface of the cutter cover body, which is close to the optical fiber clamp mounting base, the bottom of the transmission support rod is fixedly connected to the inner side of the upper surface of the optical fiber clamp mounting base, and the miniature bearing is mounted at the top of the transmission support rod through a miniature bearing fixing pin; the transmission bracket and the optical fiber clamp mounting base are fixed by waist-shaped hole screws for adjusting the mounting position; the cutter cover body is opened, and the wedge-shaped top block is separated from the miniature bearing; the cutting knife cover body closing process is divided into two stages, the wedge-shaped top block is not contacted with the miniature bearing in the first half closing process, the closing of the cutting knife cover body does not act on the base of the optical fiber mounting clamp, the wedge-shaped top block is contacted with the miniature bearing in the second half closing process, and the miniature bearing moves in the direction away from the cutting knife cover body under the extrusion action of the wedge-shaped top block along with the closing process.

Further, press fine lid including pressing fine lid main part, press fine lid pivot subassembly, magnet four, magnet five, platform hole, linear guide second base, linear guide second slider, press fine keysets, circular deep hole three, press fine spring locating pin and optic fibre briquetting fixed pin, wherein:

the fiber pressing cover body is connected with the cutting knife body through the fiber pressing cover body pivoting assembly, the fiber pressing cover body can open and close around the fiber pressing cover body pivoting assembly, the magnet IV is arranged at the bottom of the front side of the fiber pressing cover body, the magnet V with opposite magnetic poles is arranged at the corresponding position of the cutting knife body, the cover body closing limiting block is arranged at the bottom of the cantilever of the fiber pressing cover body, and a practical limiting block matched with the limiting block is arranged at the relative position of the cutting knife body; the fiber pressing cover body is characterized in that an accommodating groove is formed in the fiber pressing cover body, an opening is formed in the lower end of the accommodating groove, a platform hole is formed in the upper end of the accommodating groove, a linear guide rail second base is arranged at the bottom of the accommodating groove, the linear guide rail second base protrudes out of the opening at the lower end of the accommodating groove, the width of a linear guide rail second sliding block is larger than the width of the opening at the lower end of the accommodating groove, the opening at the lower end of the accommodating groove is provided with a limiting function, a fiber pressing adapter plate is mounted on the linear guide rail second sliding block, a circular deep hole III is formed in the upper end of the fiber pressing adapter plate, a fiber pressing spring is arranged in the circular deep hole III, one side of the fiber pressing spring positioning pin is fixed in the platform hole at the upper end of the accommodating groove, the other side penetrates through the fiber pressing spring and stretches into the circular deep hole III formed in the upper end of the fiber pressing adapter plate, a round hole IV is formed in the lower end of the fiber pressing adapter plate, a fiber pressing block fixing pin penetrates through the round hole IV, two sides of the fiber pressing block fixing pin are respectively fixed in a mounting hole of the fiber pressing block, the fiber pressing block positioning pin is smaller than the round hole IV, the diameter of the fiber pressing block is suspended in the round hole IV, the lower end round hole IV of the fiber pressing block fixing pin is suspended by the fiber pressing block fixing pin, the fiber pressing block can freely move around the fiber pressing block to a certain extent, the fiber pressing block can swing in the vertical direction, the vertical direction can swing in the vertical direction, and can swing in the width direction, and can be limited by the width of the optical pressing block fixing block can swing in the lower end through the opening and can swing through the opening in the opening and can swing in the lower end through the width.

Further, the fiber pressing spring is always in a compressed state, one side of the fiber pressing spring is contacted with the inner side of the upper wall of the accommodating groove, the other side of the fiber pressing spring is contacted with the bottom of the deep round hole III at the upper end of the fiber pressing adapter plate, and under the elastic force of the fiber pressing spring, the components such as the linear guide rail II slide block and the fiber pressing adapter plate on the linear guide rail II slide block tend to move towards the direction away from the upper side of the accommodating groove; when the fiber pressing cover body is opened, the lower side of the linear guide rail two sliding blocks is contacted with the inner wall of the lower side of the accommodating groove under the action force of the spring; when the fiber pressing cover body is closed, the limiting block and the limiting block limit the closing position through contact, the bottom of the front end of the fiber pressing cover body is not in contact with the cutter body, the magnet IV and the magnet five are close to each other to generate attractive force for overcoming the elasticity of the fiber pressing spring to further compress the fiber pressing spring, the components such as the linear guide rail II sliding block and the fiber pressing adapter plate on the linear guide rail II sliding block move towards the direction approaching to the upper side of the accommodating groove, and the fiber pressing block elastically contacts with the limiting V groove arranged at the corresponding position of the cutter body at a constant pressure.

Further, in the moving stroke of the second slide block of the linear guide rail, the fiber pressing spring positioning pin is not contacted with the third bottom of the deep round hole at the upper end of the fiber pressing adapter plate; the optical fiber pressing block and the limiting V groove are made of ceramics, and the main function of the optical fiber pressing cover body is to apply a fixed pressure through the optical fiber pressing block, so that the optical fiber pressing block keeps limiting in the vertical direction to be matched with the limiting V groove, and the end part of the optical fiber to be cut is pressed.

Further, take tension polarization maintaining fiber cutter still includes the cutter base, and the cutter base includes linear guide rail three, knife rest, blade altitude mixture control subassembly, blade, score cutting thrust spring guiding axle, guiding axle fixed subassembly, score cutting knife readiness position limit subassembly and cushion, wherein:

the cutting thrust spring guide shaft is parallel to the linear guide rail III, the front side of the tool rest is provided with an inverted U-shaped structure, the cutting thrust spring guide shaft penetrates through the U-shaped structure, one end of the cutting thrust spring is contacted with the front side guide shaft fixing component, the other end of the cutting thrust spring is contacted with the front wall of the inverted U-shaped structure of the tool rest, the cutting thrust spring is always in a compressed state, and under the condition of no limitation, the tool rest and the upper part tend to move towards the rear side guide shaft fixing component; the blade is arranged on the blade height adjusting component, and the blade height adjusting component is arranged on the tool rest; the scribing knife preparation position limiting assembly is located on the side face of the scribing thrust spring and is matched with the U-shaped structure to limit the position.

Further, take tension polarization maintaining fiber cutter still includes to cut starting component, cuts starting component and includes swing arm, switch base, take shoulder miniature bearing, swing arm fixed pin, goes up top spring, bush and shift knob, wherein:

the bushing is fixed on the cutter main body, the switch button can slide smoothly in the bushing, the swing arm is arranged on the switch base through the miniature bearing with shoulder and the swing arm fixing pin, and the swing arm can rotate around the swing arm fixing pin; the upper ejection spring is always in a compressed state, is arranged in a circular deep hole at the left side of the switch base and tends to jack up the left side of the swing arm under the action of no external force; the front end of the swing arm is provided with an L-shaped obtuse angle crotch for clamping the U-shaped structure outside the tool rest, and the middle section of the swing arm is provided with a limiting rod perpendicular to the swing arm for limiting the swing arm.

Compared with the prior art, the invention has the following technical characteristics:

1. when the optical fiber clamp is installed, the end part of the optical fiber is placed in the optical fiber limiting V groove, so that the optical fiber placing direction is perpendicular to the cutting direction of the blade, and the cutting angle is reduced.

2. The optical fiber cutting device has the advantages that the constant pressure is generated by the pressing fiber cover plate, the constant pressure is applied to the side face of the optical fiber positioned in the optical fiber limiting V groove through the optical fiber pressing block, the optical fiber is enabled to slide in the optical fiber limiting V groove by the aid of the closing and linkage assembly of the cutting knife cover body, the constant tension is kept on the optical fiber to be cut, the tension is equal to the sliding friction force, the optical fiber clamping under the constant tension is achieved, the optical fiber is ensured to be mounted in a straight and repeated mode, the cutting stability and the cutting repeatability are improved, and the cutting of the thin-diameter optical fiber is particularly facilitated.

3. By setting a proper tension, the quality of the cut optical fiber can be improved. The tension is proportional to the product of the spring coefficient and deformation of the fiber pressing spring, and the tension can be quantitatively changed by selecting springs with different parameters.

Drawings

FIG. 1 is a schematic view of the overall exploded construction of the present invention;

FIG. 2 is a schematic diagram of a partially refined exploded construction of the present invention;

FIG. 3 is a schematic view of a fiber clamp mounting base embodying the present invention;

FIG. 4 is a schematic view of the linkage assembly of the present invention;

FIG. 5 is a schematic view of a fiber cover plate structure according to the present invention;

FIG. 6 is a schematic view of the cutter base structure of the present invention;

FIG. 7 is a schematic view of a scribe initiation assembly of the present invention;

FIG. 8 is a schematic view of the use of the cutter base and the scoring switch of the present invention in combination;

FIG. 9 is a front view of the cutter base and the score switch of the present invention in use;

FIG. 10 is an image of the end face of an optical fiber after cutting the polarization maintaining fiber at 40 μm elliptical stress region;

FIG. 11 is an image of the end face of an optical fiber after the cut of a 40 μm panda stress region polarization maintaining fiber;

FIG. 12 is an image of the end face of the fiber after the cut of the 60 μm panda stress region polarization maintaining fiber.

The reference numerals in the figures illustrate: 1 cutting knife main part, 2 cutting knife lid, 3 optic fibre anchor clamps installation base, 4 linkage subassembly, 5 press fine lid, 6 spacing V groove, 7 cutting knife base, 8 and cut starting component.

Detailed Description

Referring to fig. 1 to 9, an embodiment of the present invention provides a fiber cutter with tension and polarization maintaining, which includes a cutter body 1, a cutter cover 2, a fiber clamp mounting base 3, a linkage assembly 4, a fiber pressing cover 5 and a limit V-groove 6, wherein:

the cutting knife cover body 2 and the fiber pressing cover body 5 are respectively and pivotally connected to the side surface of the cutting knife main body 1, and the cutting knife cover body 2 and the fiber pressing cover body 5 can be independently opened and closed; the optical fiber clamp mounting base 3 is movably arranged in the accommodating groove on the left side of the cutting knife main body 1; the linkage assembly 4 is fixed on the side surface of the cutter cover body 2, which is close to the optical fiber clamp mounting base 3, and the inner side of the upper surface of the optical fiber clamp mounting base 3; when the cutter cover body 2 is closed, the cutter cover body 2 drives the optical fiber clamp mounting base 3 to move; the limit V-groove 6 is fixed on the right side of the cutter body 1, an optical fiber pressing block 512 is movably arranged in the fiber pressing cover body 5, and when the fiber pressing cover body 5 is closed, the optical fiber pressing block 512 is in contact fit with the limit V-groove 6 and presses the optical fiber under a constant pressure.

When the optical fiber is cut, the fiber pressing cover body 5 is closed firstly, the fiber pressing cover body 5 is elastically contacted with the limit V-shaped groove 6 under a constant pressure, and the optical fiber is clamped by the fiber pressing cover body 5 and the limit V-shaped groove 6; the cutting knife cover body 2 is closed again, the optical fiber installation base 3 is driven to move leftwards through the linkage assembly 4, and the optical fiber to be cut is tensioned by constant sliding friction tension; finally, the scribing starting component 8 is pressed to cut the optical fiber.

In one embodiment of the invention:

the cutter lid includes cutter lid main part 201, cutter lid pivot subassembly 202, magnet one 203, magnet two 101, wherein:

the cutter cover body 201 is connected with the cutter body 1 through the cutter cover pivoting assembly 202, the cutter cover body 201 can be opened and closed around the cutter cover pivoting assembly 202, the first magnet 203 is arranged at the bottom of the front side of the cutter cover body 201, and the second magnet 101 with opposite magnetic poles is arranged at the opposite position of the cutter body 1; when the cutter cover body 2 is closed, the magnet one 203 and the magnet two 101 are close to each other face to generate attractive force, and the attractive force is used for pressing two sides of the cut optical fiber on one hand and pushing the linkage assembly 4 to move on the other hand. The pivot assembly 202 has various realization forms, such as 2 flanged micro bearings and a screw nut pair, and can also be realized by a micro ball bushing guide assembly, so that the cutter cover body 1 can be flexibly opened and closed through the designed pivot assembly, and no obvious shake exists between the cutter cover body 1 and the cutter cover body 1 in the opening and closing process; the side of the cutter cover body 201, which is close to the optical fiber clamp mounting base 3, is provided with a strip-shaped groove for mounting the wedge-shaped top block 401 in the linkage assembly 4, and the width of the strip-shaped groove is slightly larger than that of the wedge-shaped top block 401.

In one embodiment of the invention:

the optical fiber fixture mounting base 3 includes a linear guide rail base 301, a linear guide rail slider 302, an optical fiber fixture adapting plate 303, a resistance spring 304, a resistance spring positioning pin 305, a resistance spring baffle 306, an optical fiber fixture positioning pin 307, and an optical fiber fixture attracting magnet three 308, wherein:

the linear guide rail I base 301 is fixed at the bottom of a containing groove arranged on the upper side of the cutter body 1, the optical fiber clamp adapting plate 303 is fixed on the linear guide rail I sliding block 302, a circular deep hole I is arranged in the middle of the left side of the optical fiber clamp adapting plate 303, the resistance spring 304 is arranged in the circular deep hole I, one side of the resistance spring positioning pin 305 is fixed on the resistance spring baffle 306, the resistance spring baffle 306 is fixed on the left side of the cutter body 1, the other side of the resistance spring positioning pin 305 penetrates through the resistance spring 304 and stretches into the circular deep hole I on the left side of the optical fiber clamp adapting plate 303, the two optical fiber clamp positioning pins 307 are vertically fixed on the upper side of the optical fiber clamp adapting plate, and the optical fiber clamp adsorption magnet III 308 is arranged in the containing groove arranged on the upper side of the optical fiber clamp adapting plate 303; the resistance spring 304 is always in a compressed state, one side of the resistance spring 304 is contacted with the resistance spring baffle 306, the other side is contacted with the bottom of the deep round hole on the left side of the optical fiber clamp adapting plate 303, and under the action of the elasticity of the resistance spring 304, the linear guide rail, the sliding block 302, the optical fiber clamp adapting plate 303 and other components tend to move in a direction away from the resistance spring baffle 306.

When the cutter cover body 2 is opened, the right side of the optical fiber clamp adapting plate 303 contacts with the right side wall of the accommodating groove of the cutter body 1 under the acting force of the resistance spring 304, or the right side wall of the transmission supporting rod 402 contacts with the right side wall of the accommodating groove of the cutter body 1 for accommodating the transmission supporting rod, or other limiting modes, and the optical fiber clamp adapting plate can be specifically designed comprehensively according to actual needs. When the cutter cover 2 is closed, under the action of the linkage assembly, the linear guide rail-sliding block 302 and the optical fiber clamp adapting plate 303 and other assemblies move towards the direction approaching to the resistance spring baffle 306 against the elastic force of the resistance spring 304. In addition, the resistance spring positioning pin does not contact with a bottom of the deep circular hole on the left side of the optical fiber jig adapting plate 303 in the moving stroke of the linear guide rail-slider 302. The elastic force of the resistance spring is set in a proper range so as not to be too large to affect the opening and closing of the cutter cover 2 nor so small as not to push the movement of the linear guide-slider 302. The optical fiber clamp adapting plate 303 is connected with the linear guide rail in a kidney-shaped hole screw fixing mode capable of adjusting the installation position by a small margin, and is used for adjusting the position of the optical fiber clamp to realize fixed-length cutting. The optical fiber jig positioning pin 307 and the optical fiber jig attracting magnet three 308 are used for convenient and repeated installation of the optical fiber jig, and are not limited to this mode, and can be modified accordingly according to the specific structure of the optical fiber jig. The inner side of the upper surface of the optical fiber clamp adapting plate 303 is provided with a containing groove for installing and fixing the linkage assembly.

In one embodiment of the invention:

the linkage assembly 4 includes a wedge-shaped top block 401, a drive strut 402, a micro bearing 403 and a micro bearing fixing pin 404, wherein:

wedge kicking block 401 fixed connection is in the side that cutter lid 2 is close to optic fibre anchor clamps installation base 3, and transmission branch 402 bottom fixed connection is inboard at optic fibre anchor clamps installation base 3 upper surface, and miniature bearing 403 passes through miniature bearing fixed pin 404 to be installed at transmission branch top. The transmission bracket 402 and the optical fiber clamp mounting base 3 are fixed by waist-shaped hole screws with the mounting positions being adjustable by a small margin; the cutter cover body 2 is opened, and the wedge-shaped top block 401 is separated from the miniature bearing 403; the closing process of the cutter cover body 2 is divided into two stages, in the first half closing process, the wedge-shaped top block 401 is not contacted with the miniature bearing 403, the closing of the cutter cover body 2 does not act on the base of the optical fiber mounting clamp, in the second half closing process, the wedge-shaped top block 401 is contacted with the miniature bearing 403 and moves along with the closing process, the miniature bearing 403 moves away from the cutter cover body 3 under the extrusion action of the wedge-shaped top block 401, and the moving quantity influencing factors include the height of the wedge-shaped top block 401, the wedge angle and the mounting position on the side surface of the cutter cover body 201, the height and the extending length of the transmission supporting rod 402 and the mounting position on the upper surface of the optical fiber mounting clamp base 3, and the diameter of the miniature bearing 403 are required to be comprehensively designed.

The optical fiber cutting length, that is, the length of the optical fiber extending out of the optical fiber clamp is equal to the length from the end part of the optical fiber clamp to the cutting knife when the optical fiber clamp is initially installed plus the length of the cutting knife cover body 2 for closing the optical fiber clamp installation base driven by the linkage assembly 4, and the two lengths depend on the comprehensive design of the cutting knife cover body 2, the optical fiber clamp installation base 3 and the linkage assembly 4.

In one embodiment of the invention:

the fiber pressing cover body 5 comprises a fiber pressing cover body 501, a fiber pressing cover body pivoting assembly 502, a magnet four 503, a magnet five 103, a platform hole 504, a linear guide second base 505, a linear guide second slide block 506, a fiber pressing adapter plate 507, a circular deep hole three 508, a fiber pressing spring 509, a fiber pressing spring positioning pin 510 and a fiber pressing block fixing pin 511, wherein:

the fiber pressing cover body 501 is connected with the cutter body 1 through the fiber pressing cover body pivoting assembly 502, the fiber pressing cover body 501 can open and close around the fiber pressing cover body pivoting assembly 502, the magnet IV 503 is arranged at the bottom of the front side of the fiber pressing cover body 501, the magnet V103 with opposite magnetic poles is arranged at the corresponding position of the cutter body 1, the cover body closing limiting block 504 is arranged at the bottom of the cantilever of the fiber pressing cover body 501, and the limiting block 104 which is matched with the limiting block in practical is arranged at the relative position of the cutter body 1. The fiber pressing cover body 501 is internally provided with a containing groove 502, the lower end of the containing groove 502 is provided with an opening 503, the upper end of the containing groove is provided with a platform hole 504, the bottom of the containing groove is provided with a linear guide rail two base 505, the linear guide rail two base 505 protrudes out through the opening 503 at the lower end of the containing groove, the width of the linear guide rail two sliding block 506 is larger than that of the opening 503 at the lower end of the containing groove, namely, the linear guide rail two sliding block 506 cannot protrude out of the containing groove 502, the opening 503 at the lower end of the containing groove has a limiting function, the linear guide rail two sliding block 506 is provided with a fiber pressing adapter plate 507, the upper end of the fiber pressing adapter plate 507 is provided with a circular deep hole III 508, a fiber pressing spring 509 is arranged in the circular deep hole III 508, one side of a fiber pressing spring positioning pin 510 is fixed in the platform hole 504 at the upper end of the containing groove, the other side penetrates the fiber pressing spring 509 and protrudes into the circular deep hole III 508 arranged at the upper end of the fiber pressing adapter plate 507, the lower end of the fiber pressing adapter plate 507 is provided with a round hole IV, the fiber pressing block fixing pin 511 penetrates through the round hole IV, two sides of the fiber pressing block fixing pin 511 are respectively fixed in mounting holes of the fiber pressing block 512, the diameter of the fiber pressing block fixing pin 511 is smaller than that of the round hole IV, the fiber pressing block 512 is hung in the round hole IV at the lower end of the fiber pressing adapter plate through the fiber pressing block fixing pin, the fiber pressing block 512 can freely move around the fiber pressing block fixing pin 511 to a certain extent, the moving space of the fiber pressing block 512 in the direction parallel to the fiber pressing block fixing pin 511 is not large, namely, the fiber pressing block 512 is limited in the vertical direction and can swing in the horizontal direction, the width of the lower end of the fiber pressing adapter plate 507 and the width of the fiber pressing block 512 are smaller than that of the opening 503 at the lower end of the accommodating groove 502, and the opening 503 at the lower end of the accommodating groove 502 can be extended out. The fiber pressing spring 509 is always in a compressed state, one side of the fiber pressing spring 509 is contacted with the inner side of the upper wall of the accommodating groove 502, the other side of the fiber pressing spring 509 is contacted with the bottom of the deep round hole III 508 at the upper end of the fiber pressing adapter plate, and under the action of the elasticity of the fiber pressing spring 509, the components such as the linear guide rail II sliding block 506 and the fiber pressing adapter plate 507 above tend to move in the direction away from the upper side of the accommodating groove 502. When the fiber pressing cover body 5 is opened, the lower side of the linear guide rail two sliding blocks 506 is contacted with the inner wall of the lower side of the accommodating groove 502 under the action of the spring. When the fiber pressing cover body 5 is closed, the limiting block 504 and the limiting block 104 limit the closing position through contact, the bottom of the front end of the fiber pressing cover body 501 is not in contact with the cutter body 1, a gap of about 0.5mm exists, the magnet IV 503 and the magnet V103 are close to each other face to generate attractive force, the attractive force is used for overcoming the elasticity of the fiber pressing spring 509 to further compress the fiber pressing spring 509, the components such as the linear guide rail II sliding block 506 and the fiber pressing adapter plate 507 above the linear guide rail II sliding block 506 move towards the direction approaching to the upper side of the accommodating groove 502, and the fiber pressing block 512 is in elastic contact with the limiting V groove 6 arranged at the corresponding position of the cutter body 1 under constant pressure. In the moving stroke of the second slider 506 of the linear guide rail, the fiber pressing spring positioning pin 510 does not contact with the bottom of the third deep round hole 508 at the upper end of the fiber pressing adapter plate 507. The spring force of the fiber pressing spring is set in a proper range, and is not too large to influence the closing of the fiber pressing cover body 5 or too small to push the linear guide rail two sliding blocks 506 to move. The constant pressure exerted by the fiber pressing cover plate 5 is equal to the product of the elastic coefficient of the fiber pressing spring 509 and the deformation amount of the fiber pressing spring 509, wherein the elastic coefficient of the fiber pressing spring 509 is related to the diameter, the wire diameter, the material and the effective number of turns of the fiber pressing spring 509, namely, the selection of the spring, the deformation amount of the fiber pressing spring 509 depends on the specific design of the fiber pressing cover body 5, the deformation amount can be quantitatively changed by changing the design of the fiber pressing cover body, and once the design is fixed, the deformation amount is fixed. The pivot assembly 502 can be implemented in various ways, such as by 2 flanged micro-bearings and a threaded nut pair, or by a micro-ball bushing guide assembly, requiring that the fiber pressing cover body 501 be flexibly opened and closed by a designed pivot assembly without significant wobble between the cutter body 1 during the opening and closing process. The optical fiber pressing block 512 and the limit V-groove 6 are made of ceramics. The main function of the fiber pressing cover body 5 is to apply a fixed pressure through the fiber pressing block 512, and the fiber pressing block keeps limiting in the vertical direction so as to be matched with the limiting V-shaped groove 6 to press the end part of the fiber to be cut. The above is one implementation and other implementations are possible, such as with bushings and guide structures.

The fiber cut maintains tension equal to the sliding friction force, which is equal to the product of the coefficient of friction, which remains the same after the material is selected, and the applied pressure, which as described above, can be quantitatively changed by the selection of the fiber pressing spring 509 and the design of the fiber pressing cover 5. In actual fiber cleaving, the optimum tension can be determined by process experimentation.

In addition to the above components, the tension polarization maintaining fiber cutter further includes a cutter base 7 and a scribe start component 8 to perform a cutting action, which is described in the following as a brief description.

In one embodiment of the invention:

fig. 6 is an implementation of the cutter base 7, where the cutter base 7 mainly includes a linear guide rail three 701, a blade holder 702, a blade height adjustment assembly 703, a blade 704, a fiber bending elastic member ejection control assembly 705, a dicing thrust spring 706, a dicing thrust spring guide shaft 707, a guide shaft fixing assembly 708, a dicing blade preparation position limiting assembly 709, and a buffer pad 710, and in which:

the cutting thrust spring guide shaft 707 is parallel to the linear guide rail three 701, the front side of the tool rest 702 is provided with an inverted U-shaped structure, the cutting thrust spring guide shaft 707 penetrates through the U-shaped structure, one end of the cutting thrust spring 706 is in contact with the front guide shaft fixing component 708, the other end of the cutting thrust spring 706 is in contact with the front wall of the inverted U-shaped structure of the tool rest 702, the cutting thrust spring 706 is always in a compressed state, and the tool rest 702 and upper components tend to move towards the rear guide shaft fixing component 708 without limitation; blade 704 is mounted on blade height adjustment assembly 703, blade height adjustment assembly 703 being mounted on blade holder 702; the scribing knife preparation position limiting component 709 is positioned on the side face of the scribing thrust spring 706 and is matched with the U-shaped structure to limit the position; blade 704 is further provided with a fiber bending elastic member ejection control assembly 705, which is a conventional mechanism and will not be described in detail.

In one embodiment of the invention:

fig. 7 is an implementation of a scribe-start assembly 8, the scribe-start assembly 8 comprising a swing arm 801, a switch base 802, a shoulder micro-bearing 803, a swing arm securing pin 804, an upper top spring 805, a bushing 806, and a switch button 807, wherein:

the bushing 806 is fixed to the cutter body 1, and the switch button 807 can slide smoothly in the bushing 806 with a small sliding clearance, which is generally achieved by using a standard bushing pair. The swing arm 801 is mounted on the switch base 802 through a shoulder miniature bearing 803 and a swing arm fixing pin 804, and the swing arm 801 can rotate around the swing arm fixing pin. The upper top spring 805 is always in a compressed state, and the upper top spring 805 is arranged in a circular deep hole on the left side of the switch base, and tends to jack up the left side of the swing arm 801 under the action of no external force. The front end of the swing arm 801 is provided with an L-shaped small-size obtuse angle hook for clamping the U-shaped structure on the outer side of the tool rest 702, and the middle section of the swing arm 801 is provided with a limiting rod perpendicular to the swing arm for limiting the swing arm.

Fig. 8 is a schematic view of the cooperation of the cutter base 7 and the scribe initiation assembly 8. Before optical fiber cutting, the tool rest 702 is manually pushed to a cutting preparation position against the elasticity of a cutting thrust spring, the cutting preparation position is determined by a cutting tool preparation position limiting assembly 709, when the tool rest 702 is positioned at the cutting preparation position, a U-shaped structure on the outer side of the tool rest 702 is automatically clamped by a hook at the front end of the swing arm 801, when the optical fiber is cut, a switch button 807 is pressed downwards, the hook at the front end of the swing arm 801 is lifted, the tool rest 702 moves to a final position at a fixed repeated speed under the action of the elasticity of the cutting thrust spring 706, and the final position is determined by a rear guide shaft fixing assembly 708.

Fig. 9 is a side view of the cutter base 7 and the scribe initiation assembly 8 in combination.

According to the above steps, the 40 μm elliptic stress zone polarization maintaining optical fiber, the 40 μm panda stress zone polarization maintaining optical fiber and the 60 μm panda stress zone polarization maintaining optical fiber are cut respectively, and the cut optical fiber images are shown in fig. 10 to 12.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced equally; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (10)

1. Take tension polarization maintaining fiber cutter, its characterized in that includes cutter main part (1), cutter lid (2), fiber clamp installation base (3), linkage subassembly (4), presses fine lid (5) and spacing V groove (6), wherein:

the optical fiber clamp mounting base (3) is movably arranged in a containing groove on the left side of the cutting knife main body (1), the linkage assembly (4) is fixed on the side surface, close to the optical fiber clamp mounting base (3), of the cutting knife cover (2) and the inner side of the upper surface of the optical fiber clamp mounting base (3), and when the cutting knife cover (2) is closed, the cutting knife cover (2) drives the optical fiber clamp mounting base (3) to move; the limiting V-shaped groove (6) is fixed on the right side of the cutting knife main body (1), an optical fiber pressing block (512) is movably arranged in the fiber pressing cover body (5), and when the fiber pressing cover body (5) is closed, the optical fiber pressing block (512) is in contact fit with the limiting V-shaped groove (6) and presses the optical fiber under constant pressure.

2. The tension polarization maintaining fiber cutter of claim 1, wherein the cutter cover (2) comprises a cutter cover body (201), a cutter cover pivot assembly (202), a magnet one (203) and a magnet two (101), wherein:

the cutter cover body (201) is connected with the cutter body (1) through the cutter cover pivoting assembly (202), the cutter cover body (201) can be opened and closed around the cutter cover pivoting assembly (202), the first magnet (203) is arranged at the bottom of the front side of the cutter cover body (201), and the second magnet (101) with opposite magnetic poles is arranged at the opposite position of the cutter body (1); when the cutting knife cover body (2) is closed, the magnet I (203) and the magnet II (101) are close to each other face to generate attractive force, and the attractive force is used for pressing two sides of the cut optical fiber and pushing the linkage assembly (4) to move; the side surface of the cutting knife cover body (201) close to the optical fiber clamp mounting base (3) is provided with a strip-shaped groove for mounting a wedge-shaped top block (401) in the linkage assembly (4), and the width of the strip-shaped groove is larger than that of the wedge-shaped top block (401).

3. The tension polarization maintaining fiber cutter of claim 1, wherein the fiber clamp mounting base (3) comprises a linear rail base (301), a linear rail slider (302), a fiber clamp adapter plate (303), a resistance spring (304), a resistance spring positioning pin (305), a resistance spring baffle (306), a fiber clamp positioning pin (307), and a fiber clamp attracting magnet three (308), wherein:

the linear guide rail first base (301) is fixed at the bottom of a containing groove arranged on the upper side of the cutting knife main body (1), the optical fiber clamp adapting plate (303) is fixed on the linear guide rail first sliding block (302), a circular deep hole I is arranged in the middle of the left side of the optical fiber clamp adapting plate (303), the resistance spring (304) is arranged in the circular deep hole I, one side of the resistance spring positioning pin (305) is fixed on the resistance spring baffle (306), the resistance spring baffle (306) is fixed on the left side of the cutting knife main body (1), the other side of the resistance spring positioning pin (305) penetrates through the resistance spring (304) and penetrates into the circular deep hole I on the left side of the optical fiber clamp adapting plate (303), the two optical fiber clamp positioning pins (307) are vertically fixed on the upper side of the optical fiber clamp adapting plate, and the optical fiber clamp adsorption magnet III (308) is arranged in the containing groove arranged on the upper side of the optical fiber clamp adapting plate (303); the resistance spring (304) is always in a compressed state, one side of the resistance spring (304) is contacted with the resistance spring baffle plate (306), the other side is contacted with the bottom of the deep round hole on the left side of the optical fiber clamp adapting plate (303), and under the elastic force of the resistance spring (304), the linear guide rail-sliding block (302) and the optical fiber clamp adapting plate (303) component above tend to move in the direction away from the resistance spring baffle plate (306).

4. The tension polarization-maintaining optical fiber cutter according to claim 1, wherein when the cutter cover body (2) is opened, the right side of the optical fiber clamp adapting plate (303) is contacted with the right side wall of the accommodating groove of the cutter body (1) or the right side wall of the transmission supporting rod (402) is contacted with the right side wall of the accommodating groove of the cutter body (1) for accommodating the transmission supporting rod under the acting force of the resistance spring (304); when the cutter cover body (2) is closed, under the action of the linkage assembly, the linear guide rail-sliding block (302) and the optical fiber clamp adapting plate (303) on the linear guide rail-sliding block overcome the elasticity of the resistance spring (304) and move towards the direction approaching to the resistance spring baffle plate (306); in addition, in the moving stroke of the linear guide rail-sliding block (302), the resistance spring positioning pin (305) is not contacted with the bottom of the deep round hole on the left side of the optical fiber clamp adapting plate (303); the optical fiber clamp adapting plate (303) is connected with the linear guide rail I in a waist-shaped hole screw fixing mode with the installation position adjustable, and is used for adjusting the position of the optical fiber clamp to realize fixed-length cutting.

5. The tension polarization maintaining fiber cutter of claim 1, wherein the linkage assembly (4) comprises a wedge-shaped top block (401), a drive strut (402), a micro bearing (403) and a micro bearing fixing pin (404), wherein:

the wedge-shaped top block (401) is fixedly connected to the side surface, close to the optical fiber clamp mounting base (3), of the cutting knife cover body (2), the bottom of the transmission support rod (402) is fixedly connected to the inner side of the upper surface of the optical fiber clamp mounting base (3), and the miniature bearing (403) is mounted at the top of the transmission support rod through the miniature bearing fixing pin (404); the transmission bracket (402) and the optical fiber clamp mounting base (3) are fixed by waist-shaped hole screws for adjusting the mounting position; the cutter cover body (2) is opened, and the wedge-shaped top block (401) is separated from the miniature bearing (403); the cutting knife cover body (2) closing process is divided into two stages, in the first half closing process, the wedge-shaped top block (401) is not contacted with the miniature bearing (403), the closing of the cutting knife cover body (2) does not act on the base of the optical fiber mounting clamp, in the second half closing process, the wedge-shaped top block (401) is contacted with the miniature bearing (403) and moves along with the closing process, and the miniature bearing (403) moves in a direction away from the cutting knife cover body (3) under the extrusion action of the wedge-shaped top block (401).

6. The tension polarization maintaining fiber cutter of claim 1, wherein the fiber pressing cover (5) comprises a fiber pressing cover body (501), a fiber pressing cover pivoting assembly (502), a magnet four (503), a magnet five (103), a platform hole (504), a linear guide two base (505), a linear guide two slide block (506), a fiber pressing adapter plate (507), a circular deep hole three (508), a fiber pressing spring (509), a fiber pressing spring positioning pin (510) and a fiber pressing block fixing pin (511), wherein:

the fiber pressing cover body (501) is connected with the cutter body (1) through a fiber pressing cover body pivoting assembly (502), the fiber pressing cover body (501) can be opened and closed around the fiber pressing cover body pivoting assembly (502), a magnet IV (503) is arranged at the bottom of the front side of the fiber pressing cover body (501), a magnet V (103) with opposite magnetic poles is arranged at the corresponding position of the cutter body (1), a cover body closing limiting block (504) is arranged at the cantilever bottom of the fiber pressing cover body (501), and a practical limiting block (104) matched with the limiting block is arranged at the relative position of the cutter body (1); the fiber pressing cover body (501) is internally provided with a containing groove (502), the lower end of the containing groove (502) is provided with an opening (503), the upper end of the containing groove is provided with a platform hole (504), one side of a fiber pressing spring positioning pin (510) is fixed in the platform hole (504) at the upper end of the containing groove, the other side of the fiber pressing spring passes through the fiber pressing spring (509) and is detected into the round hole III (508) arranged at the upper end of the fiber pressing plate (507), the lower end of the fiber pressing plate (507) is provided with a four-round hole, the fiber pressing plate (507) is provided with a limit function, the fiber pressing plate (507) is arranged on the linear guide rail II (506), the upper end of the fiber pressing plate (507) is provided with a round hole III (508), the fiber pressing spring (509) is arranged in the round hole III (508), one side of the fiber pressing spring positioning pin (510) is fixed in the platform hole (504) at the upper end of the containing groove, the other side passes through the fiber pressing spring (509) and is detected into the round hole III (508) arranged at the upper end of the fiber pressing plate, the lower end of the fiber pressing plate (507) is provided with a four round hole, the fiber pressing plate (511) passes through the four-round hole pressing block (511) and the diameter pressing block (512) is fixed in the fiber pressing block and the four-round hole pressing block fixing pins (511) are respectively arranged at the fiber pressing plate, the optical fiber pressing block (512) can freely move around the optical fiber pressing block fixing pin (511), the optical fiber pressing block (512) is limited in the vertical direction and can swing in the horizontal direction, the width of the lower end of the optical fiber pressing block (507) and the width of the optical fiber pressing block (512) are smaller than the width of the lower end opening (503) of the accommodating groove (502), and the lower end opening (503) of the accommodating groove (502) can be penetrated out.

7. The tension polarization maintaining optical fiber cutting knife according to claim 6, wherein the fiber pressing spring (509) is always in a compressed state, one side of the fiber pressing spring (509) is in contact with the inner side of the upper wall of the accommodating groove (502), the other side of the fiber pressing spring is in contact with the bottom of a deep round hole III (508) at the upper end of the fiber pressing adapter plate, and under the action of the elasticity of the fiber pressing spring (509), the components such as the linear guide rail two sliding blocks (506) and the fiber pressing adapter plate (507) above tend to move in a direction away from the upper side of the accommodating groove (502); when the fiber pressing cover body (5) is opened, the lower side of the linear guide rail two sliding blocks (506) is contacted with the inner wall of the lower side of the accommodating groove (502) under the action force of a spring; when the fiber pressing cover body (5) is closed, the limiting block (504) and the limiting block (104) are in contact to limit the closing position, the bottom of the front end of the fiber pressing cover body (501) is not in contact with the cutter body (1), the magnet IV (503) and the magnet V (103) are close to each other face to generate attractive force, the fiber pressing spring (509) is further compressed by overcoming the elasticity of the fiber pressing spring (509), the components such as the two sliding blocks (506) of the linear guide rail and the fiber pressing adapter plate (507) on the two sliding blocks move towards the direction approaching to the upper side of the accommodating groove (502), and the fiber pressing block (512) is in elastic contact with the limiting V groove (6) arranged at the corresponding position of the cutter body (1) under constant pressure.

8. The tension polarization-maintaining optical fiber cutting knife according to claim 6, wherein in the moving stroke of the linear guide rail two sliding blocks (506), the fiber pressing spring positioning pin (510) is not contacted with the bottom of the deep round hole III (508) at the upper end of the fiber pressing adapter plate (507); the optical fiber pressing block (512) and the limiting V groove (6) are made of ceramics, and the main function of the optical fiber pressing cover body (5) is to apply a fixed pressure through the optical fiber pressing block (512), so that the optical fiber pressing block keeps limiting in the vertical direction to be matched with the limiting V groove (6) to tightly press the end part of the optical fiber to be cut.

9. The tension polarization maintaining fiber cutter of claim 1, further comprising a cutter base (7), the cutter base (7) comprising a linear guide rail three (701), a blade holder (702), a blade height adjustment assembly (703), a blade (704), a dicing thrust spring (706), a dicing thrust spring guide shaft (707), a guide shaft fixing assembly (708), a dicing blade preparation position limiting assembly (709), and a buffer pad (710), wherein:

the cutting thrust spring guide shaft (707) is parallel to the linear guide rail III (701), the front side of the tool rest (702) is provided with an inverted U-shaped structure, the cutting thrust spring guide shaft (707) penetrates through the U-shaped structure, one end of the cutting thrust spring (706) is in contact with the front guide shaft fixing component (708), the other end of the cutting thrust spring is in contact with the front wall of the inverted U-shaped structure of the tool rest (702), the cutting thrust spring (706) is always in a compressed state, and the tool rest (702) and an upper part tend to move towards the rear guide shaft fixing component (708) without limitation; the blade (704) is mounted on a blade height adjustment assembly (703), the blade height adjustment assembly (703) being mounted on the blade holder (702); the scribing knife preparation position limiting assembly (709) is positioned on the side face of the scribing thrust spring (706) and is matched with the U-shaped structure to limit the position.

10. The tension polarization maintaining fiber cutter of claim 1, further comprising a scribe initiation assembly (8), the scribe initiation assembly (8) comprising a swing arm (801), a switch base (802), a shoulder micro bearing (803), a swing arm securing pin (804), an upper top spring (805), a bushing (806), and a switch button (807), wherein:

the bushing (806) is fixed on the cutter body (1), the switch button (807) can slide smoothly in the bushing (806), the swing arm (801) is arranged on the switch base (802) through the miniature bearing (803) with shoulder and the swing arm fixing pin (804), and the swing arm (801) can rotate around the swing arm fixing pin (804); the upper ejection spring (805) is always in a compressed state, the upper ejection spring (805) is arranged in a circular deep hole on the left side of the switch base, and the left side of the swing arm (801) tends to be ejected under the action of no external force; the front end of the swing arm (801) is provided with an L-shaped obtuse angle hook for clamping a U-shaped structure at the outer side of the tool rest (702), the middle section of the swing arm (801) is provided with a limiting rod perpendicular to the swing arm, and the limiting rod is used for limiting the swing arm (801).