WO2009012625A1

WO2009012625A1 - An fc-sc, fc-sc-apc optical fiber shortcut connector

Info

Publication number: WO2009012625A1
Application number: PCT/CN2007/002994
Authority: WO
Inventors: Jinan Huang; Genliang Lv
Original assignee: Jiangsu Yute Optical Technologies Co., Ltd
Priority date: 2007-07-23
Filing date: 2007-10-19
Publication date: 2009-01-29
Also published as: CN101122656A

Abstract

An FC-SC, FC-SC-APC optical fiber shortcut connector, comprises a pushing device (14), a guiding positioning device (12), a pressing device (13) and a locking device (15), and is packaged by a insert needle (1), a case (2), a spring (3), a spring connecting holder (4), a insert needle holder sleeve (5), a dual-cone clamper (6), a locking screw (7) and an end case (8).

Description

FC-SC, FC-SC-APC fiber fast connection sub-technical field

The present invention relates to a connection device, and in particular to a FC-SC, FC-SC-APC fiber quick-connect. Background technique

At present, in the fiber optic docking field of FTTH fiber-to-the-home and triple-play integration projects, there is no corresponding product for FC-SC. FC-SC-APC quick connection. The existing products cannot be simple, convenient and reliable. , low cost connection. Summary of the invention

The object of the present invention is to provide an FC-SC, FC-SC-APC fiber quick connector, which realizes ultra-low-loss connection without intermittent points when the fiber is connected quickly, simplifies the complexity of the fiber construction project, and improves the success of the fiber cold connection. Rate, greatly reduce the return loss value, and can be recycled to reduce the cost of use.

The technical solution of the invention is: installing a quick-connecting sub-body in the thrust device to form a fiber-optic quick-connecting device, the thrust device is composed of a spring, FC or SC housing, a spring connecting seat and a tail shell, and the quick-connecting sub-body passes through the spring connecting seat Pressed by a spring in the FC or SC housing, the tail shell is mounted at the end of the spring connector to be integrally assembled; the quick-connecting sub-body is composed of a guiding and positioning device, a pressing device and a locking device, wherein the guiding position The device is composed of a pin and a pin socket, and the pin is fixed in the pin socket of the pin to form a guiding and positioning device, wherein the pin has a precision micro-guide positioning hole, and the front end of the pin seat sleeve is provided with a pressing device receiving cavity. There is a fiber through hole in the middle of the pin socket, and a large conical cavity and an internal thread are arranged at the end of the pin socket; wherein the pressing device is composed of a V-shaped block, a gland, and a spring The sleeve is in contact with the gland, and the surface of the V-shaped block is in contact with the gland. The V-shaped through hole is formed by a precision V-shaped groove. The V-shaped block and the gland are mounted in the receiving device of the pin holder sleeve and are held by the spring sleeve. Forming the pressing device; wherein, the locking device is composed of a locking screw and a double-cone collet body, the front end of the locking screw has a small cone surface cavity, and the locking screw is connected to the internal thread of the end of the pin holder sleeve through the locking nut pair A locking cavity is formed on the locking cavity, and a double-cone collet body is arranged in the locking cavity to form a locking device. The double-cone collet body has large and small tapered faces on both sides, and a set of locking grooves are opened on the large and small tapered faces, The cone chuck body is a fiber optic line hole, the large cone surface of the double cone collet body cooperates with the large cone surface of the end of the pin holder sleeve, the small cone surface of the double cone collet body, and the small cone surface of the front end of the locking screw .

The FC-SC and FC-SC-APC optical fiber quick-connecting strips of the invention have precise micro-guided positioning holes on the pins, and the bare-fiber guiding taper holes are arranged at the tail ends of the precise micro-guided positioning holes.

The FC-SC and FC-SC-APC optical fiber quick connector of the present invention has a V-shaped through hole formed by a precision V-shaped groove on the surface of the V-shaped block and the gland, and the end of the V-shaped through hole of the optical fiber is V The block fiber guides the taper hole, and the V-shaped block has a guide cone rib on the back.

The FC-SC and FC-SC-APC optical fiber quick-connecting device of the invention has three locking grooves on the size cone surface of the double-cone collet body, and a positioning handle is set at the tail of the double-cone collet body, The double-cone collet body has a retaining groove on the surface of the optical fiber hole, the large taper surface of the double-cone collet body cooperates with the large conical surface of the end of the pin holder sleeve, and the small taper surface of the double-cone collet body cooperates with the locking screw Small cone cavity.

In the FC-SC and FC-SC-APC optical fiber quick-connecting device of the present invention, the front end of the spring connecting seat is provided with a spring pushing surface, and the front end of the pin socket is provided with a spring positioning surface.

The FC-SC, FC-SC-APC optical fiber quick connector of the invention, the precise micro-guide positioning hole on the pin, the fiber V-shaped through hole of the V-shaped block, the fiber through hole of the pin socket sleeve, the double cone The fiber optic line holes of the collet body are on the same axis. In the construction of the project, firstly insert the fiber fast-connecting into the special adapter base and remove the tail shell; then use a special tool to cut the fiber that has been stripped according to a certain length and the fiber into the fiber of the double-cone collet body. In the line hole, the bare fiber passes through the V-shaped block through the fiber through hole of the pin socket, and the bare fiber head is pushed out from the precise micro guiding hole of the pin, and the special adapter ensures that the bare fiber is fixed in length; Tighten the locking screw to lock the fiber sheath, and then use a special sleeve tool to push the spring into the

The V-shaped block presses the V-block and the gland by the back rib of the V-shaped block to press the bare fiber; finally, the fiber section is polished by a hand-held polishing machine or a simple APC-specific 8-degree polishing machine, the surface of the pin is cleaned, and the adapter is inserted. , complete the fiber fast connection.

The invention has the following advantages: 1. The fiber has no connection point inside the quick connection, and realizes ultra-low loss of the fiber connection; 2. The precision micro-guide positioning hole of the ceramic pin has high-precision guiding positioning; 3. The pressing device passes the V-shaped block The back ribs hold the V-shaped block and the gland to compress the bare fiber, preventing the fiber head from twisting, and ensuring the return loss of the fiber surface polishing time. 4. The double-cone collet body is applied at multiple angles, and the fiber sheath is securely locked. The fiber optic connection is safe and secure; 5. The spring thrust device is reliable in structure, ensuring reliable bonding of the fiber surface in the adapter; 6. The fiber end face can be polished on site, which greatly improves the surface quality of the fiber head, thereby greatly reducing the loss; Polished surface, can be applied to APC type quick connection, suitable for FTTH fiber-to-the-home and triple-player projects, with wide application range; 8. The fiber quick-connector can be recycled and reused, reducing the cost of use; IX. Overall manufacturing cost Low cost, suitable for large-scale promotion. DRAWINGS

Figure 1 is a schematic diagram of the FC-APC fiber quick-connect sub-structure.

2 is a schematic diagram of the sub-structure of the SC-APC fiber quick-connecting. Figure 3 is a 3D view of the double-cone collet body of Figures 1 and 2.

Figure 4 is a 3D view of the fiber stub of Figures 1 and 2.

Figure 5 is a schematic view of the pressing device of Figures 1 and 2.

Figure 6 is a 3D view of the V-shaped block of Figure 5.

Figure 7 is a cross-sectional 3D view of Figure 6.

Figure 8 is a 3D view of the spring case of Figures 1 and 2.

Figure 9 is a schematic view of the FC thrust device of Figure 1.

Figure 10 is a schematic view of the SC pushing device of Figure 2.

Figure 11 is a schematic view of the locking device of Figures 1 and 2.

Figure 12 is a cross-sectional view showing the appearance of Figure 1 in 3D.

Figure 13 is a cross-sectional view showing the appearance of Figure 2 in 3D.

Symbol Description

1 pin 2 FC or SC housing

3 spring 4 spring connector

5 pin holder sleeve 6 double cone collet body

7 locking screws 8 3⁄4 redundant

9 V block 10 gland

11 spring sleeve 12 guide positioning device

13 Pressing device 14 Thrust device

15 Locking device 1-1 Precision micro guide positioning hole

1-2 bare fiber guide cone 4-1 spring push surface

5-1 Pressing device housing cavity 5-2 Fiber through hole 5-3 large cone cavity 5-4 internal thread

5-5 Spring positioning surface 6-1 Large cone

6-2 small taper 6-3 locking groove

6-4 Fiber Optic Hole 6-5 Retreat

6-6 Positioning Grip 7-1 Locking Nut Pair

7-2 small cone cavity 9-1 rib with guide cone

9-2 Fiber V-through hole 9-3 Precision V-groove

9-4 V-block fiber guiding cone hole

As shown in FIG. 1-13, the quick-connecting sub-body is assembled in the thrust device 14 to form a fiber quick-connecting device. The thrust device 14 is composed of a spring 3, an FC or SC housing 2, a spring connecting seat 4, and a tail casing 8, and is fast connected. The child body is pressed into the inner casing 2 of the SC plastic by the spring 3 through the spring connecting seat 4, and the tail shell 8 is mounted integrally at the end of the spring connecting seat; the quick connecting sub-body is guided by the guiding device 12, the pressing device 13 and the locking device 15 is constructed, wherein the guiding and positioning device 12 is composed of a pin 1, a pin holder sleeve 5, and the pin 1 is fixed in the pin holder sleeve 5 to form a guiding and positioning device 12, and the pin 1 has The precision micro-guide positioning hole 1-1, the front end of the pin socket 5 is provided with a pressing device accommodating chamber 5-1, and the pin holder sleeve 5 has a fiber through hole 5-2 in the middle thereof, and the pin holder sleeve 5 has a tail end. The large conical cavity 5-3 and the internal thread 5-4; wherein the pressing device 13 is composed of a V-shaped block 9, a gland 10, and a spring sleeve 11, and the surface of the V-shaped block 9 in contact with the gland 10 has a precision V-shaped surface. The optical fiber V-shaped through hole 9-2 formed by the groove 9-3, the V-shaped block 9 and the gland 10 are mounted in the pressing device accommodating chamber 5-1 of the pin holder sleeve 5, and are held by the spring case 11 to form a pressure. 13 apparatus; wherein the locking device 15 by a locking screw 7, the cartridge body 6 biconical configuration, the front end of the locking screw has a small cone cavity Ί 7-2, by locking screw Ί The lock nut pair 7-1 is connected with the internal thread 5-4 of the end of the pin holder sleeve 5 to form a locking cavity, and the double cone collet body 6 is installed in the locking cavity to form the locking device 15, the double cone collet body 6 on both sides are large and small cones 6-1, 6-2, large and small cones 6-1, 6-2 open a set of locking grooves 6-3, double cone collet body 6 is fiber optic line Hole 6-4, the large cone surface 6-1 of the double cone collet body 6 cooperates with the large cone surface 5-3 of the end of the pin holder sleeve 5, and the small cone surface 6-2 of the double cone collet body 6 cooperates with the lock The small tapered cavity 7-2 at the front end of the screw 7 is tightened.

The FC-SC and FC-SC-APC fiber quick-connecting device of the present invention, as shown in FIG. 4, has a fine fine guiding positioning hole 1-1 on the pin 1, and a tail end of the precise fine guiding positioning hole 1-1 is provided. Bare fiber guide cone hole 1-2.

The FC-SC, FC-SC-APC fiber quick-connecting device of the present invention, as shown in Figs. 5, 6, and 7, has a fiber formed by a precision V-groove 9-3 on the surface of the V-shaped block 9 in contact with the gland 10. The V-shaped through hole 9-2, the end of the optical fiber V-shaped through hole 9-2 is a V-shaped block 9 fiber guiding cone hole 9-4, and the V-shaped block 9 has a guiding cone rib 9-1 at the back.

The FC-SC, FC-SC-APC fiber quick-connecting device of the present invention, as shown in FIG. 3, three locking grooves 6 are provided on the tapered surfaces 6-1 and 6-2 of the double-cone collet body 6 3. Set the position grip 6-6 at the tail of the double cone collet body 6, and set the retaining groove 6-5 on the surface of the fiber optic line hole 6-4 of the double cone collet body 6, the double cone collet body 6 The large conical surface 6-1 is matched with the large conical surface 5-3 of the end of the pin holder sleeve 5, and the small conical surface 6-2 of the double cone collet body 6 is fitted with the small conical surface of the locking screw 7 7-2 .

The FC-SC and FC-SC-APC optical fiber quick-connecting device of the present invention, as shown in Figs. 9 and 10, the spring connecting seat 4 has a spring pushing surface 4-1 at the front end thereof, and a spring positioning surface at the front end of the pin socket sleeve. 5-5.

The FC-SC, FC-SC-APC optical fiber quick connector of the present invention, the precise fine guiding positioning hole 1-1 on the pin 1, the optical fiber V-shaped through hole 9-2 of the V-shaped block 9, and the pin socket The fiber through hole 5-2 of the 5, and the fiber line hole 6-4 of the double cone collet body 6 are on the same axis. In the construction of the project, firstly insert the fiber fast-connecting into the special adapter base and remove the tail shell 8; then cut the fiber that has been stripped according to a certain length with a special tool, and insert the fiber into the double-cone collet body 6 In the optical fiber hole 6-4, the bare fiber passes through the V-shaped block 9 through the fiber through hole 5-2 of the pin holder sleeve 5, and the bare fiber tip is guided from the precision of the pin 1 to the positioning hole 1-1. Introduced in the middle, the special adapter ensures that the bare fiber is fixed in length; then tighten the locking screw 7 to lock the fiber sheath, and then use the special sleeve tool to push the spring sleeve 11 into the V-shaped block 9 through the V-shaped block 9 back rib 9 -1 Hold the V-shaped block 9 and the gland 10 to press the bare fiber; Finally, polish the fiber section with a hand-held polishing machine or a simple APC-specific 8-degree polishing machine, clean the surface of the pin, insert the adapter, and complete the fiber connection.

The FC-SC, FC-SC-APC fiber quick connector of the present invention has the following technical parameters: the insertion loss is lower than O.ldB; the tensile strength of the fiber sheath is greater than 1000 g; and the thermal stability is in the range of 40 to 80 degrees Celsius Guaranteed normal operation; return loss is greater than 60dB.

Claims

Claim

1. FC-SC, FC-SC-APC fiber quick-connecting, characterized by: installing a quick-connecting sub-body in the thrust device to form a fiber-optic quick-connecting device, and the thrust device (14) is composed of a spring '(3),

The FC or SC housing (2), the spring connection seat (4), and the tail housing (8) are formed, and the quick-connecting sub-body is pressed by the spring (3) to the FC or SC housing (2) through the spring connection seat (4). The tail casing (8) is mounted integrally at the end of the spring connection seat (4); the quick-connecting sub-body is composed of a guiding positioning device (12), a pressing device (13) and a locking device (15) Wherein, the guiding and positioning device (12) is composed of a pin (1) and a pin socket (5), and the pin (1) is fixed in the pin seat sleeve (5) to form a guiding and positioning device (12). The pin (1) has a precision micro-guide positioning hole (1-1), the front end of the pin holder sleeve (5) is provided with a pressing device receiving chamber (5-1), and the pin holder sleeve (5) has an optical fiber in the middle. Through hole (5-2), the socket end sleeve (5) has a large tapered cavity (5-3) and an internal thread (5-4) at the end; wherein the pressing device (13) is made of a V-shaped block ( 9), gland (10), spring case (11), V-shaped block (9) and the gland (10) contact surface with a V-shaped through hole formed by a precision V-groove (9-3) (9) -2), V-piece (9) and gland (10) are mounted on the pin holder (5) The pressing device receiving chamber (5-1) is held by the spring sleeve (11) to form the pressing device (13); wherein the locking device (15) is composed of the locking screw (7) and the double cone clamp The head body (6) is formed, the front end of the locking screw (7) has a small tapered cavity (7-2), and the locking screw (7) is connected to the pin socket through the lock nut pair (7-1) (5) The internal thread (5-4) at the end end is a locking cavity, and the double-cone collet body (6) is installed in the locking cavity to form a locking device (15), and the double-cone collet body (6) is large on both sides. Small cone (6-1,

6-2), the double cone chuck body (6) is provided with a fiber optic line hole (6-4), and the large cone surface of the double cone collet body (6)

(6-1) Match the large cone cavity (5-3) at the end of the pin holder sleeve (5), and the small taper surface (6-2) of the double cone collet body (6) with the locking screw (7) Small tapered cavity at the front end (7-2).

2. The FC-SC, FC-SC-APC optical fiber quick connector according to claim 1, wherein: the pin (1) has a fine micro-guide positioning hole (1-1) for precise fine guiding and positioning. The bare end of the hole (1-1) is provided with a bare fiber guide taper hole (1-2).

3. The FC-SC, FC-SC-APC optical fiber quick connector according to claim 1, wherein: a V-shaped groove is formed on a surface of the V-shaped block (9) that is in contact with the gland (10) (9). -3) Forming the fiber V-shaped through hole (9-2), the end of the fiber V-shaped through hole (9-2) is a V-shaped block (9) Fiber guiding cone hole (9-4), V-shaped block ( 9) There is a guiding cone rib (9-1) on the back.

4. The FC-SC, FC-SC-APC optical fiber quick connector according to claim 1, wherein: the double cone collet body (6) has tapered sides (6-1, 6-2) on both sides. In the double cone collet body

(6) Three locking grooves (6-3) are provided on the tapered surfaces (6-1, 6-2).

The FC-SC, FC-SC-APC fiber quick-connector according to claim 1, characterized in that the position grip (6-6) is set at the tail of the double-cone collet body (6).

6. The FC-SC, FC-SC-APC fiber quick connector according to claim 1, characterized in that: the surface of the fiber optic line hole (6-4) of the double-cone collet body (6) is provided with a stop Slot (6-5).

7. The FC-SC, FC-SC-APC optical fiber quick connector according to claim 1, wherein a spring pushing surface (4-1) is provided at a front end of the spring connecting seat (4).

8. The FC-SC, FC-SC-APC fiber quick connector according to claim 1, wherein: the front end of the pin holder sleeve (5) is provided with a spring positioning surface (5-5).

9. The FC-SC, FC-SC-APC fiber optic quick connector according to claim 1, characterized by: a precision fine guiding positioning hole (1-1) on the pin (1), a V-shaped block (9) ) The fiber V-shaped through hole (9-2), the fiber through hole (5-2) of the pin holder sleeve (5), and the optical fiber hole (6-4) of the double cone collet body (6) are in the same On the axis.