CN109782391B

CN109782391B - Optical fiber fusion splicer

Info

Publication number: CN109782391B
Application number: CN201910231437.9A
Authority: CN
Inventors: 张连炯; 李永华
Original assignee: Zhejiang Dafeng Pipelines Network Co ltd
Current assignee: Zhejiang Dafeng Pipelines Network Co ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-09-22
Anticipated expiration: 2039-03-26
Also published as: CN109782391A

Abstract

The invention relates to the field of communication engineering equipment, and discloses an optical fiber fusion splicer which comprises a main body, wherein the main body is provided with a wire aligning device for positioning and butting the end parts of optical fibers and a fusion welding electric arc for connecting the optical fibers, the main body is also provided with a stripping assembly, the stripping assembly comprises a positioning channel, a stripping driving piece and a stripping knife, the positioning channel is arranged on the surface of the main body, and is provided with a knife feeding groove extending along the length direction of the positioning channel pipeline, the outer wall of the positioning channel is fixed with a knife feeding box, a knife feeding cavity communicated with the knife feeding groove is arranged in the knife feeding box, the peeling knife is arranged in the knife feeding cavity in a sliding way along the radial direction of the positioning channel, and can stretch into the positioning channel through the cutter feeding groove along with sliding, the peeling driving part comprises a driving rod which is arranged on the cutter feeding box along the radial sliding of the positioning channel, one end of the driving rod stretches into the cutter feeding cavity, and the other end of the driving rod stretches out of the side wall of the cutter feeding box back to the positioning channel. The optical fiber peeling device is provided with the peeling assembly, can peel optical fibers well, and is convenient to use.

Description

Optical fiber fusion splicer

Technical Field

The invention belongs to the technical field of optical fiber fusion welding, and particularly relates to an optical fiber fusion welding machine.

Background

Fusion splicers are generally referred to as optical fiber fusion splicers used in the field of optical communications. The working principle is that the high-voltage electric arc is utilized to melt the sections of the two optical fibers, and the two optical fibers are gently pushed by the motion mechanism to be fused into one fiber, so that the coupling of the mode field of the optical fibers is realized.

The chinese utility model patent with publication number CN208367262U discloses an optical fiber fusion splicer with an optical fiber detection function, which comprises an optical fiber fusion splicer and an optical fiber detection module, wherein the optical fiber fusion splicer is used for splicing optical fibers; the optical fiber detection module is used for detecting optical fibers; the optical fiber welding machine is provided with a plugging slot position, a windshield and a display screen, and the optical fiber detection module is installed in the plugging slot position and is in communication connection with the optical fiber welding machine; the optical fiber fusion splicer comprises at least two optical fiber guide grooves, a pair of electrode rods and an optical fiber clamp for clamping optical fibers; LED illuminating lamps are arranged on two sides of the electrode rods, and cameras are arranged at the positions corresponding to the gaps between the two electrode rods; the windproof cover is provided with at least two optical fiber press feet and two reflectors; the reflector is used for reflecting light rays emitted by the LED illuminating lamp, the reflected light rays transmit the cross section of the optical fiber and irradiate the camera, the camera is in communication connection with the display screen, and the camera captures the reflected light rays to perform optical fiber imaging and display images on the display screen.

The fusion splicer is required to be a bare optical fiber when fusing the optical fiber, and the existing optical fiber comprises a core layer, a cladding layer, a coating layer and a jacket layer from inside to outside. The coating and jacket layers are removed, known as stripping, before fusion splicing of the optical fibers. At this time, the operation needs to be carried out by means of tools, the tools need to be additionally purchased and carried, and the tools are easy to lose and are very inconvenient.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the optical fiber fusion splicer, so that an additional peeling tool is not needed, the optical fiber is well peeled by using the peeling component arranged on the optical fiber fusion splicer, and the optical fiber fusion splicer is more convenient to use.

The technical purpose of the invention is realized by the following technical scheme: an optical fiber fusion splicer comprises a main body, wherein the main body is provided with a pair wire device for positioning and butting the end parts of optical fibers and a fusion welding electric arc for connecting the optical fibers, the main body is also provided with a peeling assembly which comprises a positioning channel, a peeling driving piece and a peeling knife, the positioning channel is arranged on the surface of the main body, and is provided with a knife feeding groove for the skinning knife to extend into the positioning channel from one side of the positioning channel, a knife feeding box is fixed on the outer wall of the positioning channel, a knife feeding cavity communicated with the knife feeding groove is arranged in the knife feeding box, the peeling knife is arranged in the knife feeding cavity in a sliding manner along the radial direction of the positioning channel, and can stretch into the positioning channel through the cutter feeding groove along with sliding, the peeling driving part comprises a driving rod which is arranged on the cutter feeding box along the radial sliding of the positioning channel, one end of the driving rod stretches into the cutter feeding cavity, and the other end of the driving rod stretches out of the side wall of the cutter feeding box back to the positioning channel.

Through adopting above-mentioned technical scheme, during the use, penetrate the location passageway with the optical fiber tip that needs were skinned earlier in, then press the actuating lever, the actuating lever promotes skinning knife and removes to the location passageway, make skinning knife prick in the skin of optic fibre, then pull out optic fibre original road, the in-process of pulling out, skinning knife lacerate the optical fiber jacket layer, pull out after can with the crust of lacerating pull down, through set up the subassembly of skinning in the main part, can conveniently peel the jacket layer of optic fibre before the butt fusion, need not in addition take skinning instrument, the use of splicer has been made things convenient for.

Further setting the following steps: the actuating lever is provided with a plurality ofly and distributes along location passageway length direction, the length of actuating lever reduces in proper order.

By adopting the technical scheme, even if some optical fibers with different types and specifications have the same outer diameter, the thicknesses of the jacket layer, the coating layer and the cladding layer are different by the thickness of the core layer, when peeling, the best effect is that the jacket layer and the coating layer are peeled without damaging the cladding layer and the core layer, and the lengths of the driving rods are set to be different, so that the driving rods can be pushed to have different distances for pushing the peeling knife to move, and the peeling requirements of the optical fibers for the different depths of the optical fibers pricked by the peeling knife are met; the same driving rod can be used for the same specification optical fiber, and the driving rod is pressed to the maximum position at every time, so that the peeling efficiency and quality are improved, and the use is more convenient.

Further setting the following steps: the part of the driving rod, which is positioned outside the knife feeding box, is in threaded connection with an adjusting sheet.

Through adopting above-mentioned technical scheme, when pressing the actuating lever, the adjustment sheet can contradict with the feed box outer wall to carry on spacingly to the maximum length that the actuating lever can stretch into in the feed box, and can adjust the maximum length that the actuating lever place actuating lever can stretch into in the feed box through the rotation of adjustment sheet, with the requirement of the different depth of feed that is adapted to the skinning knife, it is more convenient, high-efficient to use.

Further setting the following steps: the utility model discloses a stripper, including the location passageway both sides, the stripper is provided with the location passageway both sides, the stripper includes semi-annular cutting edge and handle of a knife, cutting edge middle part and the one end body coupling of handle of a knife, the handle of a knife other end penetrates the feed intracavity and sets up the conflict board, and conflict board length extends along location passageway length direction.

By adopting the technical scheme, the two sides are provided with the semi-annular cutting edges, when the driving rods on the two sides are pressed simultaneously, the two semi-annular cutting edges are close to each other to perform circular cutting on the optical fiber, so that the circular outline of the optical fiber is better adapted; the conflict board is used for providing the effect of the effort of actuating lever for when different actuating levers are pressed, the skinning knife can be atress well.

Further setting the following steps: a plurality of reset springs distributed along the length direction of the positioning channel are arranged between the inner walls of the abutting plate and the feed cavity back to the positioning channel, one end of each reset spring is abutted against the abutting plate, and the other end of each reset spring is abutted against the inner wall of the feed cavity back to the positioning channel.

Through adopting above-mentioned technical scheme, after the actuating lever was pressed, the conflict board took place to remove to the location passageway direction for reset spring is compressed, and after releasing the actuating lever, reset spring promoted the conflict board and resets.

Further setting the following steps: the alignment device comprises a base, a first guide block and a second guide block, wherein the base is fixed and protrudes to be arranged on the surface of a main body, a positioning groove for placing optical fibers is formed in the surface of the base, a notch is formed in the middle of the base, a guide rod with a vertical setting is arranged in the notch, the first guide block is arranged on the guide rod, the second guide block is arranged on the guide rod in a sliding mode and located above the first guide block, a matching groove is formed in the bottom surface of the second guide block, the first guide block is matched with the matching groove in a clamping mode, a butt joint guide groove for placing exposed sections of the optical fibers is formed in the top surface of the first guide block and the bottom surface of the second guide block, the cross section of the butt joint guide groove is in a V shape, and a welding port for welding electric arcs to extend into is formed in the first guide.

By adopting the technical scheme, during use, the part of the optical fiber which is not peeled is placed in the positioning groove, then the end part of the optical fiber on one side is placed in the butt joint guide groove at one end of the first guide block, the end part of the optical fiber on the other side is placed in the butt joint guide groove at the other end of the first guide block, then the end parts of the two optical fibers are close to each other, the second guide block is slowly put down, the matching groove of the second guide block is gradually sleeved on the first guide block, the butt joint guide groove of the second guide block is gradually contacted with the top of the bare optical fiber and applies downward acting force to the top of the bare optical fiber, so that the two bare optical fiber end parts slide down to the positions tangent to the two groove walls along the inclined groove walls of the butt joint guide groove of the first guide block, and the two optical fiber end parts are on the.

Further setting the following steps: first guide block slides and sets up on the guide bar, be provided with the setting element between first guide block and the guide bar, the setting element includes threaded connection in first guide block and the positioning bolt that bottom and guide bar contradict.

By adopting the technical scheme, because the radius of the unpeeled optical fiber is different from that of the peeled optical fiber, the height position of the first guide block needs to be adjusted, so that two sections of the optical fiber in the positioning groove and the butt joint guide groove can be on the same straight line or on the similar same straight line, the optical fiber is prevented from being inclined in the vertical direction, the optical fiber is tilted, and the head parts of the optical fibers on two sides can be well aligned during butt joint.

Further setting the following steps: the top surface of the first guide block is provided with a positioning groove, the bottom surface of the second guide block is convexly provided with a positioning lug, and the positioning lug is positioned right above the positioning groove.

Through adopting above-mentioned technical scheme, long-term slip of second guide block can make and take place wearing and tearing each other between second guide block and the guide bar, positioning bolt's location inaccuracy when the positioning inaccuracy scheduling factor can make the second guide block move down under the action of gravity, two V fonts butt joint guide grooves on first guide block and the second guide block are unable just right, and the butt joint guide groove at both ends also has the deviation, the fibre end atress condition on both sides is inconsistent, relative skew takes place, positioning groove, positioning lug's design makes first guide block and second guide block have more location guarantees when foldeing, better avoiding appearing the inaccurate condition of butt joint.

Further setting the following steps: and a guide inclined plane is arranged between the groove wall and the end face of the butt joint guide groove.

Through adopting above-mentioned technical scheme, in penetrating the end of optic fibre butt joint guide slot, need not make the optic fibre tip aim at the passageway that butt joint guide slot formed completely, utilize the guide inclined plane with the optic fibre tip guide get into the passageway that butt joint guide slot formed, convenient and fast more when the plug wire.

Further setting the following steps: and a filling sleeve is arranged in the positioning channel, and a channel for the movement of the skinning knife is arranged at the position of the filling sleeve corresponding to the skinning knife.

Through adopting above-mentioned technical scheme, thereby can change the actual internal diameter of location passageway through the use of packing cover and adapt to the optic fibre specification of different external diameters, prevent when skinning, because the mismatch of the actual internal diameter of location passageway and optic fibre external diameter, when leading to skinning knife and optic fibre contact, optic fibre takes place to remove for the irregular change takes place for the depth of skin, thereby it is too deep, damages the condition appearance of covering.

In conclusion, the invention has the following beneficial effects:

1. when the optical fiber sheath peeling device is used, the end part of an optical fiber to be peeled penetrates into the positioning channel, then the driving rod is pressed, the driving rod pushes the peeling knife to move towards the positioning channel, so that the peeling knife is pricked into the outer layer of the optical fiber, then the original optical fiber is pulled out, in the pulling-out process, the peeling knife cuts the optical fiber sheath layer, and the cut sheath layer is pulled down after being pulled out;

2. optical fibers of different models and specifications, even if some outer diameters are the same, the thicknesses of the jacket layer, the coating layer and the cladding layer are different with the thickness of the core layer, when peeling, the best effect is that the jacket layer and the coating layer are peeled off without damaging the cladding layer and the core layer, the lengths of all the driving rods are set to be different, the driving rods can be pushed to be different in distance for pushing the peeling knife to move, so that the depth of the peeling knife for pricking the optical fibers is different to meet the peeling requirements of the optical fibers, the same driving rod can be used for the optical fibers of the same specification, the driving rod is pressed to the maximum position at each time, the peeling efficiency and quality are improved, and the use is more convenient;

3. the end of the optical fiber is inserted into the butt joint guide groove, the end of the optical fiber is not required to be completely aligned with a channel formed by the butt joint guide groove, and the end of the optical fiber is guided into the channel formed by the butt joint guide groove by the guide inclined plane, so that the optical fiber splicing device is more convenient and faster in wire plugging.

Drawings

Fig. 1 is a schematic structural view of an optical fiber fusion splicer in this embodiment;

FIG. 2 is a schematic horizontal cross-sectional view of the debarking assembly of FIG. 1 taken along the axis of the locating channel;

FIG. 3 is an enlarged view of FIG. 1 at A;

fig. 4 is a schematic structural view of the guide bar, the first guide block, and the second guide block in the present embodiment.

Reference numerals: 1. a main body; 2. a wire aligning device; 21. a first guide block; 22. a second guide block; 23. a mating groove; 24. butting the guide grooves; 25. a guide ramp; 26. a melt interface; 27. a positioning groove; 28. positioning the bump; 3. welding an electric arc; 4. a peeling assembly; 41. a peeling drive member; 42. a regulating sheet; 5. a positioning channel; 51. a tool feeding groove; 6. a skinning knife; 61. a knife handle; 62. a blade; 63. a touch plate; 64. a return spring; 7. feeding a knife box; 71. a cutter feeding cavity; 72. a communicating hole; 73. a control hole; 8. a base; 81. positioning the groove; 82. a notch; 83. a guide bar; 84. a positioning member; 9. and (6) filling the sleeve.

Detailed Description

An optical fiber fusion splicer, as shown in fig. 1 and 2, comprises a main body 1, wherein a wire aligning device 2, a fusion welding arc 3 and a stripping assembly 4 are arranged on the main body 1. The peeling assembly 4 comprises a positioning channel 5, a peeling driving member 41 and a peeling knife 6. The positioning channel 5 is a hollow tubular structure and is fixed on the surface of the main body 1, and a knife feeding slot 51 is arranged on the positioning channel 5 and is used for enabling the peeling knife 6 to extend into the positioning channel 5 so as to penetrate into the outer layer of the optical fiber in the positioning channel 5.

As shown in fig. 1 and 2, the cutter feeding boxes 7 are fixed on both sides of the positioning channel 5, a cutter feeding cavity 71 is formed in each cutter feeding box 7, a communication hole 72 is formed in a surface of each cutter feeding box 7 facing the positioning channel 5, and the communication hole 72 communicates the cutter feeding cavity 71 and the cutter feeding groove 51. The surface of the knife feeding box 7 far away from the positioning channel 5 is provided with three control holes 73 distributed along the axial direction of the positioning channel 5.

As shown in fig. 1 and 2, the peeling knife 6 includes a handle 61 and a blade 62, the blade 62 is semicircular and vertically disposed in the blade inlet 51, and the handle 61 is integrally disposed in the middle of the blade 62 and passes through the communication hole 72 to extend into the blade inlet chamber 71. One end of the tool shank 61, which is far away from the cutting edge 62, is integrally provided with a contact plate 63, and the contact plate 63 extends axially along the positioning channel 5.

As shown in fig. 1 and 2, the stripping drive 41 includes a driving rod, which slides in the control hole 73, one end of which extends out of the feeding box 7 and the other end of which extends into the feeding cavity 71, and which, when pressed, slides into the feeding box 7 and pushes the contact plate 63, thereby pushing the blade 62 to move into the positioning channel 5 and pierce the outer layer of the optical fiber. The actuating lever has three, and distributes along location passageway 5 axial, and the length of three actuating levers reduces in proper order to when making to press different actuating levers, the degree of depth that the optic fibre can be pierced to cutting edge 62 reduces in proper order.

As shown in fig. 1 and 2, an adjusting piece 42 is screwed on the portion of the driving rod located outside the knife feeding case 7.

As shown in fig. 1 and 2, a return spring 64 is sleeved on the knife handle 61, one end of the return spring 64 is connected with the abutting plate 63, and the other end is connected with the inner wall of the knife feeding box 7 close to the positioning channel 5. When the driving lever is released, the return spring 64 pushes the abutting plate 63 to return the blade 62 and the abutting plate 63. When the return spring 64 is at its initial length, the position of the blade 62 is within the tool entrance slot 51.

As shown in fig. 1 and 3, the alignment device 2 includes a base 8, a first guide block 21 and a second guide block 22, the base 8 is fixed on the surface of the main body 1 and protrudes out of the surface of the main body 1, a positioning groove 81 extending along the length direction of the base 8 and penetrating through two ends of the base 8 along the length direction is formed on the surface of the base 8, a gap 82 is formed in the middle position of the base 8 along the length direction, a vertical guide rod 83 is fixed in the gap 82, and the section of the guide rod 83 is rectangular.

First guide block 21 is fixed a position on guide bar 83 through setting element 84, and setting element 84 includes positioning bolt, and positioning bolt threaded connection is on first guide block 21 and the bottom contradicts with guide bar 83, and first guide block 21 and second guide block 22 all slide on guide bar 83 and second guide block 22 is located first guide block 21 directly over. The bottom surface of the second guide block 22 is provided with a matching groove 23 with the length direction being consistent with the length direction of the base 8, the matching groove 23 penetrates through the two ends of the second guide block 22 along the length direction of the base 8, and when the second guide block 22 falls, the top end of the first guide block 21 is just inserted into the matching groove 23. The top surface of the first guide block 21 and the bottom surface of the second guide block 22 are provided with butt joint guide grooves 24 which extend along the length direction of the base 8 and penetrate through two ends, and the cross sections of the butt joint guide grooves 24 are V-shaped. A guide slope 25 is provided between the groove wall and the end face of the butt guide groove 24, and when the optical fiber is inserted, the end of the optical fiber can enter the butt guide groove 24 by the guide slope 25.

The welding opening 26 that runs through both sides is seted up to the middle part position of first guide block 21 and second guide block 22, and welding opening 26 is used for supplying the tip of welding electric arc 3 to stretch into to weld the tip of two optic fibres.

As shown in fig. 3 and 4, a positioning groove 27 is provided on the top surface of the first guide block 21, a positioning protrusion 28 is fixed on the bottom surface of the second guide block 22 in a downward protruding manner, the positioning protrusion 28 is located right above the positioning groove 27, and when the second guide block 22 falls, the positioning protrusion 28 is just inserted into and matched with the positioning groove 27.

As shown in figure 2, a filling sleeve 9 is arranged in the positioning channel 5, and a channel for the movement of the skinning knife 6 is arranged at the position of the filling sleeve 9 corresponding to the skinning knife 6.

The use principle is as follows: the optical fiber is stripped before welding. When peeling, the end of the optical fiber with shell is first inserted into the positioning channel 5, then the proper driving rod is pressed, and the driving rod is pressed to the bottom, so that the blade 62 pierces into the outer layer of the optical fiber, then the piercing state is maintained, the optical fiber is pulled outwards, and when the pulling is performed, the outer layer of the optical fiber is cut off, and the peeling operation is completed.

When the specifications of the optical fibers are different, the driving rod can be selected through tests, the test method is that the optical fibers penetrate into the positioning channel 5, the end part position of the optical fibers crosses the position of the blade 62, then the driving rod is sequentially selected for peeling, and whether the peeling is broken or not and the coating is penetrated. And the driving stroke of the same driving rod is adjusted by rotating the adjusting sheet 42.

After peeling, the optical fibers are welded, the end part with the shell of one optical fiber is placed in the positioning groove 81 on the base 8 which is formed once, the height of the first guide block 21 is moved by loosening the positioning bolt during welding, so that the end part of the optical fiber is directly in a horizontal state with the exposed end when the end part of the optical fiber is inserted into the V-shaped butt joint guide groove 24 of the first guide block 21, and then the positioning bolt is screwed down.

The sheathed part of the other optical fiber is placed in the positioning groove 81 of the base 8 on the other side, the second guide block 22 is lifted, the bare section is positioned in the V-shaped butt joint guide groove 24 of the second guide block 22, then the second guide block 22 is placed down, when the second guide block 22 falls down, the positioning lug 28, the positioning groove 27 and the matching groove 23 are sequentially matched with the top surface of the first guide block 21, the height position and the horizontal position of the bare end part of the second optical fiber are pressed down by the V-shaped butt joint guide groove and are positioned at the same height as the bare end part of the previous optical fiber, and then the welding electric arc 3 is started to weld the two end parts.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. An optical fiber fusion splicer, includes main part (1), be provided with on main part (1) and be used for carrying out the butt joint to the location to the optic fibre tip to line device (2) and be used for with the welding electric arc (3) of optic fibre connection, its characterized in that: still be provided with subassembly (4) of skinning on main part (1), subassembly (4) of skinning includes location passageway (5), driving piece (41), skinning knife (6) of skinning, location passageway (5) set up in main part (1) surface, and set up and supply skinning knife (6) to stretch into the sword inlet (51) in location passageway (5) from location passageway (5) one side, location passageway (5) outer wall is fixed with sword feed box (7), be equipped with in the sword feed box (7) with sword feed chamber (71) of sword feed (51) intercommunication, skinning knife (6) radially slide along location passageway (5) and set up in sword feed chamber (71), and can stretch into location passageway (5) through sword feed chamber (51) along with sliding, drive piece (41) of skinning includes and radially slide along location passageway (5) and set up the actuating lever on sword feed box (7), the one end of actuating lever is stretched into and is used for contradicting in sword chamber (71) and promote to support touch panel (63) and remove to location passageway (5) direction, and the other end stretches out the lateral wall of sword box (7) back to location passageway (5), the actuating lever is provided with a plurality ofly and distributes along location passageway (5) length direction, the length of actuating lever reduces in proper order, threaded connection has adjustment sheet (42) on the actuating lever is located the outer part of sword box (7).

2. An optical fiber fusion splicer according to claim 1, wherein: the peeling assembly (4) is provided with two sets of and is located location passageway (5) both sides respectively, peeling knife (6) are including semi-annular cutting edge (62) and handle of a knife (61), cutting edge (62) and handle of a knife (61) one end body coupling, and handle of a knife (61) other end penetrates in tool feed chamber (71) and sets up touch panel (63), and touch panel (63) length extends along location passageway (5) length direction.

3. An optical fiber fusion splicer according to claim 2, wherein: the knife handle (61) is sleeved with a return spring (64), one end of the return spring (64) is connected with the abutting plate (63), and the other end of the return spring is connected with the inner wall, close to the positioning channel (5), of the knife feeding box (7).

4. An optical fiber fusion splicer according to claim 1, wherein: the alignment device (2) comprises a base (8), a first guide block (21) and a second guide block (22), the base (8) is fixedly and convexly arranged on the surface of the main body (1), a positioning groove (81) for placing optical fibers is formed in the surface of the base (8), a notch (82) is formed in the middle of the base (8), a guide rod (83) which is vertically arranged is arranged in the notch (82), the first guide block (21) is arranged on the guide rod (83), the second guide block (22) is slidably arranged on the guide rod (83) and is positioned above the first guide block (21), a matching groove (23) is formed in the bottom surface of the second guide block (22), the first guide block (21) is in clamping fit with the matching groove (23), and butt joint guide grooves (24) for placing exposed optical fibers are formed in the top surface of the first guide block (21) and the bottom surface of the second guide block (22), the cross section of the butt joint guide groove (24) is V-shaped, and a fusion port (26) for a fusion electric arc (3) to extend into is formed in two side faces of the first guide block (21) and the second guide block (22).

5. An optical fiber fusion splicer according to claim 4, wherein: first guide block (21) slide and set up on guide bar (83), be provided with setting element (84) between first guide block (21) and guide bar (83), setting element (84) include threaded connection in first guide block (21) and the positioning bolt that bottom and guide bar (83) are contradicted.

6. An optical fiber fusion splicer according to claim 5, wherein: positioning grooves (27) are formed in the top surface of the first guide block (21), positioning convex blocks (28) are arranged on the bottom surface of the second guide block (22) in a protruding mode, and the positioning convex blocks (28) are located right above the positioning grooves (27).

7. An optical fiber fusion splicer according to claim 4, wherein: and a guide inclined plane (25) is arranged between the groove wall and the end surface of the butt joint guide groove (24).

8. An optical fiber fusion splicer according to claim 2, wherein: a filling sleeve (9) is arranged in the positioning channel (5), and a channel for the movement of the skinning knife (6) is arranged at the position of the filling sleeve (9) corresponding to the skinning knife (6).