Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/36—Mechanical coupling means
  • G02B6/38—Mechanical coupling means having fibre to fibre mating means
  • G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
  • G02B6/3806—Semi-permanent connections, i.e. wherein the mechanical means keeping the fibres aligned allow for removal of the fibres
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/36—Mechanical coupling means
  • G02B6/38—Mechanical coupling means having fibre to fibre mating means
  • G02B6/3807—Dismountable connectors, i.e. comprising plugs
  • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
  • G02B6/3846—Details of mounting fibres in ferrules; Assembly methods; Manufacture with fibre stubs
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/36—Mechanical coupling means
  • G02B6/38—Mechanical coupling means having fibre to fibre mating means
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/36—Mechanical coupling means
  • G02B6/38—Mechanical coupling means having fibre to fibre mating means
  • G02B6/3807—Dismountable connectors, i.e. comprising plugs
  • G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
  • G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
  • G02B6/3821—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with axial spring biasing or loading means

Definitions

• the present invention relates to an optical fiber splicing, more particularly, relates to an optical fiber splicing assembly by means of which the optical fiber may be field spliced fast and a fiber optic connector having the optical fiber splicing assembly.
• Fiber optic connectors are necessarily used in an optical fiber communication system. With wider application of optical fibers in a local communication network, and with the rising requirements for fiber access network and fiber to the home (FTTH), the demand for fiber optic connector has being continuously increased. However, plant manufacture by polishing and assembling has high cost and cannot meet such demand. Therefore, assembling connector is preferably performed at the installation field, which increases the requirements for field-installable fiber optic connectors whose assembling is fast and easy.
• the field-installable fiber optic connectors have to be time-saving, labor-saving and easily operated, for example, it is acceptable that a reliable fiber optic connector may be assembled within several minutes.
• CN200910050536.3 discloses a fiber optic connector has the above advantages, however, it cannot be used repeatedly, specifically, members of the fiber optic connector are fixed relative to each other after the splicing, and it is impossible to disassemble and reuse the fiber optic connector without destroying the assembling components or the optical fiber.
• the optical fibers should be precisely coupled, otherwise, large attenuation and inner reflection will be produced, which adversely affects the performance of the fiber optic connector. Furthermore, in order to ensure precise coupling of the optical fibers, many kinds of conventional fiber optic connectors also need special tools to perform installing and assembling, this also results in high production cost.
• the present invention is provided.
• an optical fiber splicing assembly comprising:
• an optical-fiber-splicing support base including a first end and a second end in a longitudinal direction, an optical fiber to be spliced being introduced into the optical fiber splicing assembly from the second end, wherein
• the optical-fiber-splicing support base further includes a receiving groove provided between the first end and the second end, wherein a recess is provided in the bottom of the receiving groove, and the introduced optical fiber to be spliced is received in the recess; and the optical fiber splicing assembly further comprises an optical fiber locating assembly fitted onto the optical- fiber-splicing support base, the optical fiber locating assembly having a press portion fitted within the receiving groove to press the optical fiber to be spliced and a fixing portion, wherein the press portion is movable between a press position at which the optical fiber is pressed and a release position at which the optical fiber is not pressed, and the fixing portion is adapted to releasably fix the press portion at the press position.
• the fixing portion extends from both sides of the press portion to cover at least a portion of an outer wall of the optical- fiber-splicing support base; and a plurality of snap-fit connections are formed between the fixing portion and the outer wall of the optical- fiber-splicing support base to fix the press portion at the press position.
• the fixing portion is a sliding element fitted with the optical-fiber-splicing support base and is slidable between a first position and a second position, and when the sliding element is located at the first position, the press portion is at the release position, and when the sliding element is slid to the second position, the press portion is driven to the press position.
• the press portion has a press surface for pressing the optical fiber and an actuation surface in contact with the fixing portion; and when the sliding element is slid from the first position to the second position, the sliding element presses the actuation surface to drive the press surface to press the optical fiber to be spliced.
• the press surface is parallel with a bottom surface of the receiving groove
• the actuation surface is parallel with the press surface
• the actuation surface is provided with an actuation protrusion
• the sliding element is adapted to press the actuation protrusion to drive the press surface of the press portion to press the optical fiber to be spliced.
• the press surface is parallel with a bottom surface of the receiving groove, and the actuation surface is parallel with the press surface; the surface of the sliding element in contact with the actuation surface is parallel with the actuation surface; the sliding element is moved in a direction perpendicular to the press surface while the sliding element is slid relative to the optical- fiber-splicing support base.
• the press surface is parallel with a bottom surface of the receiving groove, and the actuation surface is inclined relative to the press surface or the actuation surface is in a form of step surface; the sliding element is not moved in a direction perpendicular to the press surface while the sliding element is slid relative to the optical-fiber-splicing support base.
• the sliding element has an inclined sliding surface fitted with the actuation surface, and the inclined sliding surface and the actuation surface have the same inclined angle.
• the optical fiber locating assembly may further comprise a reset device adapted to return the press portion to the release position when the fixing of the press portion applied by the fixing portion is removed.
• the reset device is an elastic body adapted to return the press portion to the release position when the fixing of the press portion applied by the fixing portion is removed.
• the elastic body comprises a plurality of pairs of elastic bodies which extend from both sides of the press portion towards the bottom of the receiving groove and beyond the press surface.
• the receiving groove has a widened middle portion and two narrow portions at two ends of the widened middle portion, wherein the width of the press portion is slightly smaller than that of the narrow portions, and the ends of the press portion are placed in the narrow portions; the plurality of pairs of elastic bodies are provided symmetrically at both sides of a middle portion of the press portion; the plurality of pairs of elastic bodies are located in the widened middle portion.
• a fiber optic connector includes: an optical fiber splicing assembly; a housing, one end of which is provided with a receiving chamber for receiving the optical-fiber-splicing support base and the optical fiber locating assembly, and the other end of which is provided with a receiving hole; a ferrule (optical fiber inserting core) which is fixed and received in the receiving hole; and an optical fiber fixing device for detachably fixing the optical fiber, wherein the bare fiber of the optical fiber extends at least into the recess to be coupled with a bare fiber of the ferrule.
• one end of the optical fiber fixing device is inserted and fitted in the receiving chamber to form a snap-fit connection with the receiving chamber.
• the optical-fiber-splicing support base further includes a guiding tube extending from the second end, the bare fiber of the optical fiber extends through the guiding tube; and the guiding tube is guided into the one end of the optical fiber fixing device.
• the fiber optic connector further comprises a spring; the diameter of the guiding tube is smaller than the radial width of the second end; the spring is placed onto and around the guiding tube and is provided between the second end and the one end of the optical fiber fixing device.
• the other end of the optical fiber fixing device comprises a tubular body formed as a fixing portion of a protection layer of the optical fiber; a longitudinal slot is provided between the one end and the other end of the optical fiber fixing device, the longitudinal slot extending radially inwards to expose the rare fiber of the optical fiber, and the rare fiber of the optical fiber being adapted to be bent radially into the longitudinal slot.
• the fiber optic connector further comprises a boot, wherein an inner side of the front end of the boot is provided with a female thread fitted with the male thread, and the rear end of the boot is provided with a hole through which the protection layer passes.
• the fiber optic connector further includes a shell assembled outside of the housing, the shell being matched with an adapter to ensure connection between the fiber optic connector and the adapter.
• the fixing portion in the optical fiber splicing assembly of the fiber optic connector comprises the above sliding element; a side portion of the housing is provided with an elongate opening extending from an inlet end of the receiving chamber; the sliding element is provided with a protruding portion adapted to be moved along the elongate opening, wherein the protruding portion is adapted to be moved from outside of the elongate opening, and the movement of the protruding portion along the elongate opening actuates the sliding element.
• the operation of the fiber optic connector is simplified while the splicing efficiency is improved; further, the fiber optic connector may be used repeatedly and thus the splicing cost is reduced.
• Fig.1 is an exploded view of a fiber optic connector according to one embodiment of the present invention.
• Fig. 2 is a perspective view of the assembled fiber optic connector in Fig.l;
• Fig.3 is a perspective view of an optical fiber splicing assembly according to one embodiment of the present invention, wherein the optical fiber locating assembly is removed to show the receiving groove and the recess;
• Fig. 4 is an exploded view of an optical fiber splicing assembly according to one embodiment of the present invention, wherein the ferrule and the optical fiber to be spliced are shown;
• Fig.5 is a schematic view showing the assembled optical fiber splicing assembly in Fig. 4;
• Fig.6 is a schematic view of the cross section A in Fig.5, wherein the press portion is not pressed;
• Fig.7 is a schematic view of the cross section A in Fig.5, wherein the press portion is pressed;
• Fig.8 is a perspective view of the fiber optic connector in Fig. 2, wherein the housing and the boot is removed;
• Fig.9 is another perspective view of the fiber optic connector in Fig. 2, wherein the housing and the boot is removed;
• Fig.10 is a cross section view similar to Fig.6 showing another arranging manner of the optical fiber fixing assembly and the optical- fiber-splicing support base.
• the optical fiber splicing assembly comprises an optical-fiber-splicing support base 1 and an optical fiber locating assembly PA.
• the optical- fiber-splicing support base 1 includes a first end 11 and a second end 12 in a longitudinal direction, an optical fiber to be spliced 61 being introduced into the optical fiber splicing assembly from the second end 12; a receiving groove 19 provided between the first end 11 and the second end 12, wherein a recess 13 is provided in the bottom of the receiving groove 19, and the introduced optical fiber to be spliced is received in the recess.
• the optical fiber locating assembly PA is fitted onto the optical- fiber-splicing support base 1 and includes a press portion 2 and the fixing portion 3, wherein the press portion 2 is fitted within the receiving groove 19 to press the optical fiber to be spliced, and is movable between a press position at which the optical fiber is pressed and a release position at which the optical fiber is not pressed; and the fixing portion 3 is adapted to releasably fix the press portion at the press position.
• the press portion 2 may be provided in the receiving groove 19 in various manners.
• the press portion 2 may be pivotally provided in the receiving groove 19. Specifically, one end of the press portion 2 is pivotally fixed to the receiving groove 19, and the other end of the press portion 2 is used to fix the press portion 2 having been pivoted to the press position.
• the fixing portion 3 is provided to the optical- fiber-splicing support base 1 and is adapted to be moved between a first position at which the press portion 2 is fixed at the press position and a second position at which the press portion is released.
• a sheet-shape fixing portion 3 is pivotally connected to the optical- fiber-splicing support base 1 , and may be pivoted from a position where it covers the press portion 2 to a position where it does not cover the press portion 2.
• the fixing portion 3 may be in a pin form.
• the press portion 2 is released, and when the pin is inserted into the receiving groove 19, the pin is engaged with a hole in the press portion to fix the press portion 2.
• the snap-fit connection is releasable.
• the fixing portion may fix the press portion at the press position by means of a snap-fit connection.
• the fixing portion 3 extends from both sides of the press portion 2 to cover at least a portion of an outer wall of the optical-fiber-splicing support base 1 ; and a plurality of snap-fit connections are formed between the fixing portion 3 and the outer wall of the optical-fiber-splicing support base 1 to fix the press portion 2 at the press position.
• the snap-fit connection is releasable.
• the fixing portion 3 is a sliding element fitted with the optical- fiber-splicing support base 1. More specifically, the sliding element is slidable between a first position and a second position. When the sliding element is located at the first position, the press portion 2 is at the release position, and when the sliding element is slid to the second position, the press portion 2 is driven to the press position.
• the sliding element 3 covers the press portion 2 and is guided longitudinally and supported by the optical- fiber-splicing support base 1.
• the press portion 2 has a press surface 27 for pressing the optical fiber and an actuation surface 21 in contact with the fixing portion 3.
• the sliding element presses the actuation surface 21 to drive the press surface 27 to press the optical fiber to be spliced.
• the sliding element 3 is slid in a first direction (the direction towards left in Fig.l) relative to the optical- fiber-splicing support base 1, and the relative sliding causes the press portion 2 to move into the press position; when the sliding element 3 is slid in a second direction (the direction towards right in Fig.1) opposite to the first direction relative to optical- fiber-splicing support base 1, the relative sliding releases the press portion 2.
• the press surface 27 is parallel with a bottom surface of the receiving groove 19
• the actuation surface 21 is parallel with the press surface 27, and the actuation surface 27 is provided with an actuation protrusion (not shown), wherein the sliding element is adapted to press the actuation protrusion to drive the press surface 27 of the press portion 2 to press the optical fiber 61 to be spliced.
• the sliding element 3 does not move in a direction perpendicular to the press surface 27 while the sliding element 3 is slid relative to the optical- fiber-splicing support base 1.
• the press portion 2 is driven to the press position when a surface 32 of the sliding element 3 in contact with the actuation surface 21 is slid over the actuation protrusion on the actuation surface 21 in the first direction, and the press portion is released or is driven to the release position when the sliding element 3 is slid in the second direction so that the surface 32 of the sliding element 3 does not contact with the actuation protrusion on the actuation surface 21.
• the press surface 27 is parallel with the bottom surface of the receiving groove 19, and the actuation surface 21 is parallel with the press surface 27; the surface 32 of the sliding element 3 in contact with the actuation surface 21 is parallel with the actuation surface 21; the sliding element 3 is moved in a direction perpendicular to the press surface 27 while the sliding element is slid relative to the optical- fiber-splicing support base 1.
• a guider for supporting and guiding the guiding element is inclined in the longitudinal direction, or a surface of the sliding element in contact with the guider for supporting and guiding the guiding element is inclined in the longitudinal direction.
• the press surface 27 is parallel with the bottom surface of the receiving groove 19, and the actuation surface 21 is inclined relative to the press surface 27 or the actuation surface 21 is in a form of a step surface (not shown); the sliding element 3 is not moved in a direction perpendicular to the press surface 27 while the sliding element is slid relative to the optical- fiber-splicing support base 1. Further, the sliding element has an inclined sliding surface 32 fitted with the actuation surface 21, and the inclined sliding surface 32 and the actuation surface 21 have the same inclined angle.
• guiding grooves extending in or substantially in the longitudinal direction are provided outside the optical- fiber-splicing support base 1; and the sliding element 3 is provided with guiding rails fitted with the guiding grooves.
• guiding rails extending in or substantially in the longitudinal direction are provided outside the optical- fiber-splicing support base 1
• the sliding element 3 is provided with guiding grooves fitted with the guiding rails.
• the guiding rails and the guiding grooves are not limited to those shown in Figs.6-7, for example, the guiding rails and the guiding grooves may be fitted within the optical- fiber-splicing support base 1.
• the optical fiber locating assembly may further comprise a reset device adapted to return the press portion 2 to the release position when the fixing of the press portion 2 applied by the fixing portion 3 is removed.
• a reset device adapted to return the press portion 2 to the release position when the fixing of the press portion 2 applied by the fixing portion 3 is removed.
• an elastic body may be provided between the bottom surface of the receiving groove 19 and the press surface 27 of the press portion 2.
• a recess for receiving the elastic body may be provided at a corresponding position at the press surface or at a corresponding position at the bottom surface of the receiving groove.
• the reset device is the elastic body 22 which is adapted to return the press portion 2 to the release position (that is, the press portion 2 is pushed away from the press position) when the fixing of the press portion 2 applied by the fixing portion 3 is removed.
• the elastic body 22 comprises a plurality of pairs of elastic bodies which extend from both sides of the press portion 2 towards the bottom of the receiving groove 2 and beyond the press surface 27.
• the receiving groove 19 has a widened middle portion and two narrow portions at two ends of the widened middle portion, wherein the width of the press portion 2 is slightly smaller than that of the narrow portions, and the ends of the press portion 2 are placed in the narrow portions;
• the plurality of pairs of elastic bodies 22 are provided symmetrically at both sides of a middle portion of the press portion, and each of the elastic bodies extends from the side of the middle portion of the press portion 2 towards the bottom of the receiving groove 19 and beyond the press surface 27 by a predetermined distance; the plurality of pairs of elastic bodies 22 are located in the widened middle portion.
• the elastic body may be in other forms.
• the elastic body may be a spring or other elastic material that is embedded in the bottom of the receiving groove 19, in this case, the receiving groove 19 may have no widened portion.
• an elastic body such as a spring may be provided in the bottom of the receiving groove adjacent to the other end of the press portion 2.
• the elastic body may be directly provided to a portion of the press portion 2 which is not in contact with the optical fiber, and at the same time, a recess for receiving the elastic body is provided at the corresponding position at the bottom surface of the receiving groove 19.
• the pivoting device itself may be the reset device.
• the reset device By means of the reset device, when the press portion 2 is released, the press portion 2 is pushed away from the press position by the reset device, so that contact of an end surface of the rare fiber 61 with the press surface is effectively reduced or prevented when the rare fiber 61 to be spliced is inserted into the recess 13.
• the fiber optic connector includes:
• an optical fiber splicing assembly having an optical- fiber-splicing support base 1 and an optical fiber locating assembly PA, wherein the optical- fiber-splicing support base 1 includes a first end 11 and a second end 12 in a longitudinal direction, an optical fiber to be spliced 61 being introduced into the optical fiber splicing assembly from the second end 12; a receiving groove 19 provided between the first end 11 and the second end 12, and a recess 13 is provided in the bottom of the receiving groove 19, and the introduced optical fiber to be spliced is received in the recess 13; the optical fiber locating assembly PA is fitted onto the optical- fiber-splicing support base 1 and has: the press portion 2 and the fixing portion 3, the press portion 2 is fitted within the receiving groove 19 to press the optical fiber to be spliced, wherein the press portion 2 is movable between the press position at which the optical fiber is pressed and the release position at which the optical fiber is not pressed; and the fixing portion 3 is adapted to releasably fix the press
• a housing 4 one end of which is provided with a receiving chamber 42 for receiving the optical- fiber-splicing support base 1 and the optical fiber locating assembly, and the other end of which is provided with a receiving hole; a ferrule (optical fiber inserting core) 5 which is fixed and received in the receiving hole; and
• an optical fiber fixing device 7 for detachably fixing the optical fiber 6,
• the bare fiber 61 of the optical fiber 6 extends at least into the recess 13 to be coupled with a bare fiber 51 of the ferrule 5.
• one end 75 of the optical fiber fixing device 7 is inserted and fitted in the receiving chamber 42 to form a snap-fit connection with the receiving chamber.
• an opening side of the housing 4 adjacent to the receiving chamber 42 is provided with a fitting hole 43
• the one end 75 of the optical fiber fixing device 7 is provided with a claw 71 which is adapted to be fitted within the fitting hole 43.
• Other snap-fit connection manners may be used.
• the end 75 of the optical fiber fixing device 7 may be located by a shell 9 (to be described later) to be fitted with the one end of the housing 4.
• the optical-fiber-splicing support base 1 further includes a guiding tube 14 extending from the second end 12, the bare fiber 61 of the optical fiber 6 extends through the guiding tube 14; and the guiding tube 14 is guided into the one end 75 of the optical fiber fixing device 7.
• the fiber optic connector further comprises a spring 72; the diameter of the guiding tube 14 is smaller than the radial width of the second end 12; the spring 72 is placed onto and around the guiding tube 14 and is provided between the second end 12 and the one end 75 of the optical fiber fixing device 7.
• the other end of the optical fiber fixing device 7 comprises a tubular body 74 formed as a fixing portion of a protection layer 62 of the optical fiber; a longitudinal slot 73 is provided between the one end 75 and the other end of the optical fiber fixing device, the longitudinal slot 73 extending radially inwards to expose the rare fiber 61 of the optical fiber 6, and the rare fiber 61 of the optical fiber 6 being adapted to be bent radially into the longitudinal slot 73.
• the bending of the bare fiber led from the optical fiber protection layer 62 can be seen from the longitudinal slot 73.
• a male thread 76 is provided outside the middle portion; the fiber optic connector further comprises a boot 8, wherein an inner side of the front end of the boot 8 is provided with a female thread fitted with the male thread 76, and the rear end of the boot 8 is provided with a hole through which the protection layer 62 passes.
• the fiber optic connector further includes a shell 9 assembled outside of the housing 4, the shell 9 being matched with an adapter (not shown) to ensure connection between the fiber optic connector and the adapter.
• the fixing portion 3 is the sliding element arranged at the outside of the optical- fiber-splicing support base 1, the sliding element 3 covers the press portion 2 and is guided in the longitudinal direction and supported by the optical- fiber-splicing support base 1.
• the press portion 2 has a press surface 27 for pressing the optical fiber and an actuation surface 21 opposite to the press surface 27.
• the sliding element 3 is slid in a first direction (in Fig.l, means the direction towards left) relative to the optical- fiber-splicing support base 1, and the relative sliding causes the press portion 2 to move into the press position; when the sliding element 3 is slid in a second direction (that is, in Fig.
• a side portion of the housing 4 is provided with a elongate opening 41 extending from an inlet end of the receiving chamber 42; the sliding element is provided with a protruding portion 31 adapted to be moved along the elongate opening 41, wherein the protruding portion 31 is adapted to be moved from outside of the elongate opening 41, and the movement of the protruding portion 31 along the elongate opening 41 actuates the sliding element 3.
• optical fiber splicing assembly of the present invention includes:
• the optical- fiber-splicing support base 1 having the first end 11 and the second end 12; a cover body (corresponding to the press portion mentioned above) 2 which is matched with the receiving groove 19 and is placed over the elongate recess 13 for pressing the spliced optical fiber, wherein the upper surface 21 of the cover body is an inclined surface;
• the sliding element 3 provided outside of the optical- fiber-splicing support base 1, wherein the sliding element is slidable relative to the optical- fiber-splicing support base 1 and thus it may be pushed from a lower position to an upper position at the inclined surface of the cover body so that the optical fiber is gradually pressed and the optical fibers are coupled, and wherein the sliding element 3 has a protruding portion 31 ;
• the housing 4 provided outside of the optical-fiber-splicing support base 1 and the sliding element 3, wherein the elongate slot 41 is provided at a side portion of the housing 4, the protruding portion 31 of the sliding element 3 extends beyond and out of the elongate slot 41, so that when a force is applied to move the protrusion portion 31 along the elongate slot 41, the sliding element 3 is driven to slide.
• the optical fiber When the sliding element 3 is pushed from the lower position to the upper position at the inclined upper surface of the cover body 2, the optical fiber is spliced; and when the sliding element 3 is pushed from the upper position to the lower position at the inclined upper surface of the cover body 2, the cover body is released and therefore the optical fiber may be pulled out.
• the fiber optic connector is not destroyed during disassembling and it may be used repeatedly.
• the upper surface of the cover body may be a step surface, and when the sliding element is pushed from a lower rear position to an upper front position at the step surface, the cover body is pressed so that the optical fiber is pressed and the splicing of the optical fibers are achieved.
• a front side of the upper surface the cover body is provided with a protrusion, and when the sliding element is pushed from the rear side of the upper surface to the front side of the upper surface having the protrusion, the cover body is pressed and thus the optical fiber is pressed to achieve splicing.
• the fiber optic connector according to the present invention may comprise a ferrule 5 commonly made from ceramic and having an inner hole in which a bare fiber 51 is embedded, wherein the embedded bare fiber 51 extends beyond one end of the ferrule 5.
• the ceramic ferrule 5 is installed at the first end 11 of the optical- fiber-splicing support base 1 , and the bare fiber 51 further extends into the elongate recess 13 inside the optical- fiber-splicing support base 1.
• the elongate guiding tube 14 extends from the second end of the optical- fiber-splicing support base 1 for guiding the bare fiber 61 to be spliced into the recess 13 which will be field coupled or spliced with the embedded bare fiber 51.
• the guiding rails 15 are provided respectively at both sides of the optical- fiber-splicing support base 1 so that the sliding element 3 may be slid along the guiding rails 15.
• the sliding element 3 is maintained above the cover body and will not fall off from the optical- fiber-splicing support base 1.
• the guiding rails are side recesses, and the side portion of the sliding element is provided with portions which are protruded inwards to be fitted with the side recesses, so that the sliding element 3 is slidable when being pushed.
• the cover body 2 is in a block shape, and two claws 22 extend downwards from two sides of the block.
• the two claws 22 are placed at two sides of the elongate recess 13 of the optical- fiber-splicing support base 1.
• the fiber optic connector of the present invention also includes an optical fiber fixing device 7 for fixing the optical fiber (optical fiber cable) to be spliced 6, which includes the rare fiber 61 at the front end of the optical fiber 6 for splicing with the rare fiber 51 of the embedded optical fiber 5, and the non-bare fiber portion, that is, the portion having the optical fiber protection layer 62.
• the front end of the optical fiber fixing device 7 is connected with the housing 4.
• two sides of the front end of the optical fiber fixing device each has a protrusion 71 (corresponding to the claw mentioned above), and fitting holes 43 are provided at corresponding positions at the housing 4 to receive the respective protrusion 71 so that the housing 4 and the optical fiber fixing device 7 are connected together.
• An elastic body such as the spring 72 may be provided between the optical- fiber-splicing support base 1 and the optical fiber fixing device.
• the spring 72 w apply a counterforce to the ferrule to ensure a reliable connection when the ferrule is connected to the adapter (not shown).
• the spring 72 is installed outside and around the elongate guiding tube of the optical- fiber-splicing support base 1 , one side of the spring is stopped by the second end of the optical- fiber-splicing support base 1, and the other side of the spring is stopped by the front end of the optical fiber fixing device. After assembling, the spring is in a compressed state.
• the other end of the optical fiber fixing device 7 is provided with a tubular body 74 formed as a fixing part for the optical fiber protection layer 62; the middle portion of the optical fiber fixing device 7 between the end and the other end thereof is formed with the longitudinal slot 73 extending in the longitudinal direction and extending radially inwards to expose the rare fiber 61 of the optical fiber 6, the rare fiber 61 is adapted to be radially bent into the longitudinal slot 73; and the rare fiber 61 led from the optical fiber protection layer 62 may be seen from the longitudinal slot 73.
• the rare fiber 61 and the rare fiber 51 are in contact with each other, the rare fiber 61 may be slightly bent to ensure good contact.
• the fiber optic connector of the present invention may further comprise a boot 8 whose front end is provided with female thread, the female thread being fitted with the male thread at the front part of the recess body.
• a rear portion of the boot 8 is provided with a hole through which the optical fiber 6 may be passed.
• the boot comprises a front part and a rear part, the front part is made from rigid material, such as rigid plastic, and the rear part is made from a soft material, such that the bending angle of the optical fiber will not be too large and the transmission performance of the optical fiber is ensured.
• the fiber optic connector of the present invention may further include a shell 9 assembled outside of the housing 4, and when the fiber optic connector is connected with the adapter, the shell 9 is fitted with the adapter to ensure the connection between the adapter and the fiber optic connector.
• a section of the protection layer of the optical fiber is first peeled off to expose the bare fiber 61 for splicing.
• the rare fiber 61 is then inserted into the optical- fiber-splicing support base through the optical fiber fixing device for splicing with the embedded bare fiber 51.
• the bare fiber 61 is pushed forward so that a portion of the bare fiber 61 within the longitudinal slot 73 is slightly bent (the bending may be seen) to ensure good butt of the rare fibers.
• the optical fiber 6 is then temporarily fixed to the optical fiber fixing device 7 by using one hand, and the sliding element 3 is pushed by the other hand so that the surface 32 of the sliding element 3 is driven to push, against the elasticity of the elastic body 22, the press portion downward and towards the bare fiber, and finally the bare fiber is pressed (as shown from Fig.6 to Fig.7).
• the rare fiber 61 is pressed and spliced, the bent rare fiber 61 is released, and the boot 8 is threadedly fixed to the optical fiber fixing device so as to finally fix the optical fiber 6, and then the shell 9 is assembled to the housing 4 to complete the assembling of the fiber optic connector.
• the boot 8 When it is necessary to replace or remove the spliced optical fiber, the boot 8 may be screwed off first, and then the sliding element 3 is moved in a direction opposite to the above pushing direction so that the surface 32 of the sliding element 3 gradually releases the press on the press portion 2, and at the same time, the elastic body 22 gradually pushes the press portion away from the press position, and finally the press portion 2 is completely released (as shown from Fig.7 to Fig.6). Then, the rare fiber 61 may be pulled out and the optical fiber 6 may be removed from the optical fiber fixing device 7.

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• 2011
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