WO2013143354A1

WO2013143354A1 - Lc-type optical fiber connector and sc-type optical fiber connector

Info

Publication number: WO2013143354A1
Application number: PCT/CN2013/070634
Authority: WO
Inventors: 陈从干; 关宇; 丁伟伟
Original assignee: 杭州精工技研有限公司
Priority date: 2012-03-28
Filing date: 2013-01-17
Publication date: 2013-10-03

Abstract

An LC-type optical fiber connector comprising, arranged along a central axis, an insert core (1), a housing (2), a spring (3), a stopper element (4), and a tail cuff. The spring is sleeved onto the tail end of the insert core (1); a first positioning part having an anti-rotation face is arranged at the tail end of the insert core (1). A second positioning part corresponding in shape to the first positioning part is arranged at the front end of the stopper element (4). The stopper part (4) drives the insert core (1) into rotation via the first positioning part and the second positioning part matching each other. The rear end of the spring (3) is abutted against the front end of the stopper element (4). The stopper element (4) and the housing (2) are threadedly connected. A glue dispensing opening (22) used for rapid dispensing of a glue for fixing is also arranged on the housing (2). The diameter of the front end of the insert core (1) is 1.25 mm. An SC-type optical fiber connector having an identical concept. The LC-type optical fiber connector and the SC-type optical fiber are both capable of implementing 360-degree effective adjustment, thus allowing for convenient adjustment of effective matching angles, and for improvement in the matching performance of the connectors, also, both are capable of adjusting fast and slow axis angles of a polarization maintaining fiber, thus ensuring extinction ratio performance and mating performance, and are easy to assemble.

Description

LC type optical fiber connector and SC type optical fiber connector

The invention belongs to the field of optical communication technologies, and in particular relates to an optical fiber connector for physical connection of optical fiber cables in an optical fiber transmission network. Background technique

Fiber optic connectors are an essential part of fiber optic communication systems that enable the connection of optical fibers and the connection of optical fibers to passive components such as optical switches and attenuators. The primary function is to maintain two fiber ends so that one core is axially coupled to the other core, thereby coupling all of the light from one fiber to the other.

It has been widely used in fiber optic communication systems, and FC type fiber connectors are more common.

SC type fiber optic connectors, LC type fiber optic connectors, and MU type fiber optic connectors. Optical fiber connectors generally use high-precision components (composed of two pins and one coupling tube) to achieve an optical fiber alignment connection.

There are two solutions used in existing LC fiber optic connector products. The solution 1 is shown in Figure 1-4, including the ferrule.

11\ The outer casing 12, the spring 13, and the stop member 14, in order to ensure the stable performance of the product, it is required to be fixed and cannot be rotated after assembly, and the positioning structure is processed into a regular hexagon 112 by the ferrule 1 shown in Fig. 2, and Fig. 3 The illustrated housing 12 is formed by a 12-turn fit of a regular hexagon. The stop member 14 shown in Figure 4 functions only for fixing and limiting. As shown in Fig. 5-8, the second embodiment includes a ferrule 2, a casing 22, a spring 23, and a stop member 24. To ensure stable performance of the product, it is required to be fixed and cannot be rotated after assembly, and the positioning structure is as shown in Fig. 6. The uniform positioning groove 21Γ on the ferrule 2Γ is realized by the outer casing 22 and the middle uniform positioning key 22Γ shown in FIG. 7, and the stop member 24 shown in FIG. 8 only functions as a fixing and a limit. Due to the accuracy error of the material in the production process of the LC type optical fiber connector, especially when the ferrule and the optical fiber are assembled and matched, the product is prone to axial eccentricity. The positioning mechanism in the first scheme can only achieve 60 degree adjustment during production. The positioning mechanism in the second scheme can only achieve 90 degree adjustment during production. It is difficult for both solutions to adjust to the best performance position, so that the products produced are difficult to fully guarantee the performance consistency. Excessive line loss during use.

The existing SC type optical fiber connector is as shown in FIG. 9 to FIG. 11 , and includes a ferrule 外壳, a casing 2 ′, a spring 3 ′ and a stop member 4 ′. In order to ensure stable product performance, it is required to be fixed and cannot be rotated after assembly, and the positioning structure is required. The four uniformly positioned positioning grooves 11a' in the ferrule shown in FIG. 10 are combined with the two positioning keys 21a' uniformly distributed in the outer casing 2' shown in FIG. 11, and the stop member 4' is only To the role of fixed and limit. Due to the precision error of the material in the production process, especially when the ferrule and the optical fiber are assembled and matched, the product is easy to produce axial eccentricity, and the positioning mechanism can only adjust the positioning angle by 90 degrees during production. It is difficult to adjust to the position of the best performance, so that the SC-type fiber connector produced is difficult to fully guarantee the performance consistency, resulting in excessive line loss during use.

When the prior art structure is used for the polarization maintaining fiber, the deflection angle of the fast and slow axis cannot be adjusted better, and it is difficult to ensure the extinction ratio performance of the product. Because many applications require accurate positioning of the birefringence axis of the polarization-maintaining fiber, it is necessary to determine the position of the fast and slow axis of the polarization-maintaining fiber. The accuracy is directly related to its use effect, so it is necessary to develop a low-cost, easy-to-install device. The aligned fiber optic connection can be effectively adjusted. Summary of the invention

The object of the present invention is to provide a fiber optic connector that can effectively adjust 360 degrees and improve the mating performance of the connector, and can easily and effectively adjust the fast and slow axis angle of the polarization maintaining fiber to ensure the extinction ratio performance and the pairing performance. .

In order to achieve the above object, the technical solution adopted by the present invention is:

An LC type optical fiber connector includes a ferrule, a casing, a spring, a stop member and a tail sleeve installed along a central axis, wherein: the ferrule is provided with a spring on a tail end thereof, and a tail end of the ferrule is disposed a first positioning portion having an anti-rotation surface, the front end of the stopping member is provided with a second positioning portion having an outer shape corresponding to the first positioning portion, and the stopping member is matched with the second positioning portion by the first positioning portion Thereby driving the ferrule to rotate, the rear end of the spring is on the front end of the stop member, the stop member is screwed to the outer casing, and the outer casing is further provided with a dispensing opening for fast dispensing, the ferrule The front end has a diameter of 1.25 mm.

In terms of the technical advantages and disadvantages of the technical design and the manufacturing process, the ferrules are provided with a plurality of positioning keys on the tail end, and the positioning parts are respectively provided with positioning grooves corresponding to the positioning keys; A plurality of positioning slots are disposed on the tail end of the ferrule, and the positioning member is uniformly provided with a positioning key corresponding to the positioning slot.

A more preferred structure is that the ferrule and the stop member are connected by two pairs of symmetrically arranged keyway structures. The first positioning portion of the anti-rotation surface is a cylinder having an elliptical cross section, and the second positioning portion is an inner hole adapted to the shape of the cylinder. The LC-type fiber optic connector of this technical solution simplifies the manufacturing process and reduces the production difficulty.

According to one of the embodiments of the present invention, the first positioning portion of the anti-rotation surface is a cylinder having one or two anti-rotation planes, and the second positioning portion is an inner hole adapted to the shape of the cylinder.

According to one of the embodiments of the present invention, the first positioning portion of the anti-rotation surface is a cylinder of regular and irregular polygons, and the second positioning portion is an inner hole adapted to the shape of the cylinder.

Another object of the present invention is to provide an SC type fiber optic connector comprising a ferrule, an outer frame sleeve, a casing, a spring, a stop member and a tail sleeve mounted along a central axis, characterized in that: the tail of the ferrule The end is provided with a spring, the tail end of the ferrule is provided with a first positioning portion having an anti-rotation surface, and the front end of the parking member is provided with a second positioning portion having an outer shape corresponding to the first positioning portion, the stop portion The first positioning portion cooperates with the second positioning portion to drive the ferrule to rotate, and the rear end of the spring On the front end of the stop member, the stop member is screwed to the outer frame sleeve, the rear end of the stop member is sleeved with a tail sleeve, and the outer casing is clamped outside the outer frame sleeve, and the diameter of the front end of the ferrule is 2.5mm.

In terms of technical advantages and disadvantages of technical design and processing, the ferrules are provided with a plurality of positioning keys on the tail end, and the positioning parts are respectively provided with positioning grooves corresponding to the positioning keys.

In another embodiment, a plurality of positioning slots are disposed on the tail end of the ferrule, and the positioning member is uniformly provided with a positioning key corresponding to the positioning slot.

As a preferred embodiment, the ferrule and the stop member are connected by two pairs of symmetric keyway structures.

The technical idea of the present invention is to connect the ferrule and the stop member through the keyway structure, and then screw the ferrule to the outer casing through the stop member, and fix the ferrule in the outer casing. When installing, the rear end portion of the stop member can be rotated. In order to drive the ferrule to rotate, the 360 degree can be effectively adjusted, so that the effective mate angle of the ferrule can be adjusted. The tight fit of the keyway between the ferrule and the stop member ensures the performance of the product and effectively improves the mating performance of the connector. At the same time, the dispensing can be quickly dispensed through the dispensing port to ensure stable product performance. For the polarization-maintaining fiber connector, the fast and slow axis angle of the polarization-maintaining fiber can be easily and effectively adjusted to ensure the extinction ratio performance and the pairing performance. At the same time, due to the problem of thinner materials, plastic molding can be used during processing to reduce costs and protect the environment.

Compared with the prior art, the advantages of the LC type optical fiber connector and the SC type optical fiber connector of the present invention are as follows:

(1) It can realize effective adjustment of 360 degrees, so that the effective matching angle can be conveniently adjusted to improve the matching performance of the connector;

(2) At the same time, the fast and slow axis angle of the polarization maintaining fiber can be easily and effectively adjusted, and the extinction ratio performance and the pairing performance are ensured;

(3) The fiber optic connector is simple in structure, easy to assemble, and has excellent assembly efficiency and safety.

DRAWINGS

1 is a cross-sectional view showing a structure of a conventional LC type optical fiber connector; FIG. 2 is a schematic structural view of a ferrule of a conventional LC type optical fiber connector; FIG. 3 is a cross-sectional view showing a structure of a conventional LC type optical fiber connector. FIG. 4 is a schematic structural view of a conventional LC type optical fiber connector solution.

5 is a structural cross-sectional view of a conventional LC-type optical fiber connector scheme 2; FIG. 6 is a schematic structural view of a conventional LC-type optical fiber connector scheme second ferrule; FIG. 7 is a structural cross-sectional view of a conventional LC-type optical fiber connector scheme FIG. 8 is a schematic structural view of a second stop member of a conventional LC type optical fiber connector.

9 is a cross-sectional view showing the structure of a conventional SC-type optical fiber connector; FIG. 10 is a structural schematic view of a ferrule of a conventional SC-type optical fiber connector; and FIG. 11 is a schematic structural view of an outer frame of the conventional SC-type optical fiber connector.

Figure 12 is a cross-sectional view showing the structure of an LC type optical fiber connector of the present invention; Figure 13 is a ferrule of the LC type optical fiber connector of the present invention. Figure 14 is a cross-sectional view showing the structure of the outer casing of the LC-type optical fiber connector of the present invention. Figure 15 is a schematic view showing the structure of the retaining member of the LC-type optical fiber connector of the present invention.

Figure 16a is a schematic view showing the structure of the stopper of the second embodiment of the LC-type optical fiber connector of the present invention; Figure 16b is a schematic view showing the structure of the ferrule corresponding to the structure of the stopper shown in Figure 16a.

Figure 17a is a schematic view showing the structure of the stopper of the third embodiment of the LC-type optical fiber connector of the present invention; Figure 17b is a schematic view showing the structure of the ferrule corresponding to the structure of the stopper shown in Figure 17a.

Fig. 18a is a schematic view showing the structure of the stopper of the fourth embodiment of the LC type optical fiber connector of the present invention; and Fig. 18b is a schematic structural view of the ferrule corresponding to the structure of the stopper shown in Fig. 18a.

Fig. 19a is a schematic view showing the structure of the stopper of the fifth embodiment of the LC type optical fiber connector of the present invention; and Fig. 19b is a schematic view showing the structure of the ferrule corresponding to the structure of the stopper shown in Fig. 19a.

Figure 20 is a cross-sectional view showing the structure of the SC-type optical fiber connector of the present invention; Figure 21 is a schematic structural view of the ferrule of the SC-type optical fiber connector of the present invention; Figure 22 is a schematic structural view of the stop member of the SC-type optical fiber connector of the present invention; 23 is a schematic structural view of an outer casing of the SC type optical fiber connector of the present invention.

Figure 24a is a schematic view showing the structure of the stopper of the second embodiment of the SC-type optical fiber connector of the present invention; Figure 24b is a schematic view showing the structure of the ferrule corresponding to the structure of the stopper shown in Figure 24a.

Figure 25a is a schematic view showing the structure of the stopper of the third embodiment of the SC-type optical fiber connector of the present invention; and Figure 25b is a schematic view showing the structure of the ferrule corresponding to the structure of the stopper shown in Figure 25a.

Figure 26a is a schematic view showing the structure of the stopper of the fourth embodiment of the SC-type optical fiber connector of the present invention; Figure 26b is a schematic view showing the structure of the ferrule corresponding to the structure of the stopper shown in Figure 26a.

Figure 27a is a schematic view showing the structure of the stopper of the fifth embodiment of the SC-type optical fiber connector of the present invention; and Figure 27b is a schematic structural view of the ferrule corresponding to the structure of the stopper shown in Figure 27a. detailed description

The invention is further illustrated by the following examples, but the invention is not limited to these specific embodiments. Those skilled in the art will recognize that the present invention encompasses all alternatives, modifications, and equivalents that may be included within the scope of the claims.

Example 1

Referring to FIG. 12-15, the LC type optical fiber connector includes a ferrule 1, a casing 2, a spring 3, and a stop member 4, and the tail end of the ferrule 1 is provided with a spring 3, and the rear end of the spring 3 Suited on the front end of the stop member 4, the stop member 4 and the outer casing 2 threaded connection, the front end of the spring 3 abuts against the annular boss in the middle of the ferrule.

The outer casing 2 is a hollow cylindrical sleeve member for supporting the ferrule 1, and the outer casing can be made of a suitable plastic. The outer portion of the outer casing also has a mast with a crank structure. The mast is integrally formed with the outer casing base and extends in the form of a cantilever.

a first positioning portion having an anti-rotation surface is disposed at a tail end of the ferrule, and a front end portion of the stopping member is provided with a second positioning portion having an outer shape corresponding to the first positioning portion, and the parking member passes through the first positioning portion The second positioning portion is combined to drive the ferrule to rotate. As a structure that is relatively easy to implement, the first positioning portion is a plurality of positioning keys 11 uniformly distributed on the tail end of the ferrule 1 , and the second positioning portion is the parking member 4 A positioning groove 41 corresponding to the positioning key. Of course, it is not limited to the plurality of positioning slots uniformly distributed on the tail end of the ferrule 1 , and the positioning member 4 is uniformly provided with positioning keys corresponding to the positioning slots. On the basis of this technical solution, the manner in which the structure of the various ferrules 1 and the stop member 4 can be synchronously rotated by those skilled in the art should be understood to be included in the protection scope of the present invention.

The stop member 4 is coupled to the internal thread 21 of the outer casing 2 by an external thread 42 thereon.

The dispensing housing 22 is also provided with a dispensing opening 22 for quick dispensing.

The technical idea of the present invention is to connect the ferrule 1 and the stop member 4 through the keyway structure, and then fix the ferrule 1 in the outer casing 2 through the screw connection between the stop member 4 and the outer casing 2, when installed, The ferrule 1 can be rotated by rotating the tail end portion of the stop member 4 to realize an effective adjustment product of 360 degrees, so that the effective engagement angle of the ferrule 1 can be adjusted, and the key groove between the ferrule 1 and the stop member 4 is tight. The cooperation ensures the performance of the product, effectively improves the matching performance of the connector, and at the same time, the dispensing point 22 in the outer casing 2 can be quickly dispensed to ensure stable performance of the product. For the polarization-maintaining fiber connector, the fast and slow axis angle of the polarization-maintaining fiber can be easily and effectively adjusted to ensure the extinction ratio performance and the pairing performance.

This embodiment is for an LC type connector of a 0.9 mm optical cable.

Example 2

Referring to FIG. 16a and FIG. 16b, this embodiment is a schematic structural view of a second embodiment of an LC type optical fiber connector according to the present invention. In the figure, the first positioning portion of the tail end of the ferrule is processed into a cylinder having a symmetric anti-rotation plane, and the parking position is stopped. The second positioning portion of the front end of the piece is an inner hole structure, and the shape of the hole corresponds to the first positioning portion. When assembled in position, the first positioning portion of the ferrule is inserted into the second positioning portion of the stop member, the stop member The first positioning portion is combined with the second positioning portion to drive the ferrule to rotate. In the solution of the present invention, the front end of the stopping member does not represent the end surface of the stopping member, but includes an axial section, the depth of the axial section. To enable the first positioning portion to be inserted into the second positioning portion, the ferrule can be safely driven to rotate, and the person skilled in the art can determine the diameter of the ferrule.

Example 3

Referring to FIG. 17a and FIG. 17b, a schematic structural view of a third embodiment of the LC type optical fiber connector of the present invention is not the same as the second embodiment. Similarly, the first positioning portion of the tail end of the ferrule is processed into a cylinder having a side anti-rotation plane, and the second positioning portion is an inner hole adapted to the shape of the cylinder.

Example 4

Referring to the structural schematic diagram of the fourth embodiment of the LC type optical fiber connector of the present invention with reference to Figs. 18a and 18b, the first positioning portion of the tail end of the ferrule is processed into a cylinder having a regular hexagonal cross section, and the second positioning portion is in the shape of a cylinder. Fitted inner bore.

Example 5

Referring to the structural schematic diagram of the fifth embodiment of the LC type optical fiber connector of the present invention, the first positioning portion of the tail end of the ferrule is processed into a cylinder having a drum shape or an elliptical shape, and the second positioning portion is a column. The inner shape of the body shape is adapted.

Example 6

Referring to Figure 20-23, the SC type fiber optic connector includes a ferrule 1, a casing 2, an outer frame sleeve 5, a spring 3, a stop member 4, and a tail sleeve 6. The ferrule 1 is provided with a spring on the tail end thereof. 3. The tail end is connected with the stop member 4 through the keyway structure. When the card is in place, the front end of the spring is pressed against the spring seat of the ferrule 1, and the rear end of the spring 3 is at the front end of the stop member 4. The stop member 4 is screwed to the outer casing 2, and the rear end of the stop member 4 is sleeved with a tail sleeve 6, and the outer frame sleeve 5 is externally mounted on the outer casing 2.

a first positioning portion having an anti-rotation surface is disposed at a tail end of the ferrule, and a front end portion of the stopping member is provided with a second positioning portion having an outer shape corresponding to the first positioning portion, and the stopping member passes through the first positioning portion and the second positioning portion The positioning portions are combined to drive the ferrule to rotate.

In this embodiment, a plurality of positioning keys 11 are disposed on the tail end of the ferrule 1 , and the positioning member 4 is uniformly provided with a positioning groove 41 corresponding to the positioning key 11 , and the positioning key 11 and the positioning groove 41 are axially disposed. Align.

The first positioning portion may be a plurality of positioning grooves uniformly distributed on the tail end of the ferrule 1, and the second positioning portion is a positioning key on the stopping member 4 corresponding to the positioning groove.

The technical idea of the present invention is to connect the ferrule 1 and the stop member 4 through the keyway structure, and then fix the ferrule 1 in the outer casing 2 through the screw connection between the stop member 4 and the outer casing 2, when installed, The ferrule 1 can be rotated by rotating the tail end portion of the stop member 4 to achieve 360-degree effective adjustment, thereby adjusting the effective mating angle of the ferrule 1 and the close fit of the key groove between the ferrule 1 and the stop member 4. Guarantee the performance of the product and effectively improve the matching performance of the connector. For the polarization-maintaining fiber connector, the fast and slow axis angle of the polarization-maintaining fiber can be easily and effectively adjusted to ensure the extinction ratio performance and pairing performance.

Example 7

Referring to FIG. 24a and FIG. 24b, this embodiment is a schematic structural view of a second embodiment of an SC-type optical fiber connector according to the present invention. In the figure, the first positioning portion of the tail end of the ferrule is processed into a cylinder having a symmetric anti-rotation plane, and the parking position is stopped. The second positioning part of the front end of the piece is a The inner hole structure, the shape of the hole corresponding to the first positioning portion, when assembled in position, the first positioning portion of the ferrule is inserted into the second positioning portion of the stopping member, and the stopping member passes the first positioning portion and the second positioning portion The combination of the parts is used to drive the ferrule to rotate. In the solution of the present invention, the front end of the stop member does not represent the end surface of the stop member, but includes an axial section, and the depth of the axial portion is such that the first positioning portion is inserted into the second portion. After the positioning portion, the ferrule can be safely driven to rotate, and the person skilled in the art can determine the diameter of the ferrule.

Example 8

Referring to FIG. 25a and FIG. 25b, a schematic structural view of a third embodiment of the SC-type optical fiber connector of the present invention is different from the second embodiment in that the first positioning portion of the tail end of the ferrule is processed into a cylinder having a side anti-rotation plane. The second positioning portion is an inner hole adapted to the shape of the cylinder.

Example 9

Referring to the structural schematic view of the fourth embodiment of the SC-type optical fiber connector of the present invention with reference to Figs. 26a and 26b, the first positioning portion of the tail end of the ferrule is processed into a cylinder having a regular hexagonal cross section, and the second positioning portion is in the shape of a cylinder. Fitted inner bore.

Example 10

Referring to the structural schematic diagram of the fifth embodiment of the SC-type optical fiber connector of the present invention with reference to FIGS. 27a and 27b, the first positioning portion of the tail end of the ferrule is processed into a cylinder having a drum shape or an elliptical cross section, and the second positioning portion is a column. The inner shape of the body shape is adapted.

In view of the above, after reading the documents of the present invention, other various corresponding transformation schemes are required to be performed according to the technical solutions and technical contemplations of the present invention without creative mental labor, and all of them belong to the scope of protection of the present invention.

Claims

Claim

An LC type optical fiber connector comprising a ferrule, a casing, a spring, a stop member and a tail sleeve mounted along a central axis, wherein: the ferrule is provided with a spring at the tail end thereof, and a ferrule tail a first positioning portion having an anti-rotation surface is disposed at the end, and a front end of the stopping member is provided with a second positioning portion having an outer shape corresponding to the first positioning portion, and the stopping member passes through the first positioning portion and the second positioning portion Cooperating to drive the ferrule to rotate, the rear end of the spring is mounted on the front end of the stop member, the stop member is screwed to the outer casing, and the outer casing is further provided with a dispensing opening for quick dispensing. The front end of the ferrule has a diameter of 1.25 mm.

The LC-type optical fiber connector according to claim 1, wherein: a plurality of positioning keys are evenly distributed on a tail end of the ferrule, and the parking piece is uniformly provided with a corresponding positioning button. Or a plurality of positioning slots are disposed on the tail end of the ferrule, and the positioning member is evenly disposed with a positioning key corresponding to the positioning slot.

3. The LC type optical fiber connector according to claim 2, wherein: the ferrule and the stop member are connected by two pairs of symmetrically arranged keyway structures.

4. The LC type optical fiber connector according to claim 1, wherein the first positioning portion of the anti-rotation surface is a cylinder having an elliptical cross section, and the second positioning portion is an inner hole adapted to the shape of the cylinder.

The LC type optical fiber connector according to claim 1, wherein the first positioning portion of the anti-rotation surface is a cylinder having one or two anti-rotation planes, and the second positioning portion is adapted to the shape of the cylinder. Fitted inner hole.

6. The LC-type fiber optic connector according to claim 1, wherein: the first positioning portion of the anti-rotation surface is a regular and irregular polygonal cylinder, and the second positioning portion is adapted to the shape of the cylinder. hole.

7. An SC type fiber optic connector, comprising a ferrule, an outer frame sleeve, a casing, a spring, a stop member and a tail sleeve mounted along a central axis, wherein: the ferrule is provided with a spring on a tail end thereof. a first positioning portion having an anti-rotation surface is disposed at a rear end of the ferrule, and a front end portion of the stopping member is provided with a second positioning portion having an outer shape corresponding to the first positioning portion, and the stopping member passes through the first positioning portion The second positioning portion cooperates to drive the ferrule to rotate, the rear end of the spring is mounted on the front end of the stopping member, the stopping member is screwed to the outer frame sleeve, and the rear end of the stopping member is sleeved The tail sleeve is mounted outside the outer frame sleeve, and the front end of the ferrule has a diameter of 2.5 mm.

The SC type optical fiber connector according to claim 7, wherein: a plurality of positioning keys are evenly distributed on the tail end of the ferrule, and the parking parts are respectively arranged with corresponding to the positioning keys. The positioning groove of the matching; or the positioning end of the ferrule is uniformly arranged with a plurality of positioning grooves, and the positioning member is provided with a positioning key corresponding to the positioning groove.

The SC type optical fiber connector according to claim 8, wherein the ferrule and the stop member are connected by two pairs of symmetrical keyway structures.

The SC type optical fiber connector according to claim 7, wherein the first positioning portion of the anti-rotation surface is a cylinder having an elliptical cross section, and the second positioning portion is an inner hole adapted to the shape of the cylinder.

11. The SC-type optical fiber connector according to claim 7, wherein: the first positioning portion of the anti-rotation surface is a cylinder having one or two anti-rotation planes, and the second positioning portion is adapted to the shape of the cylinder. Fitted inner hole.

12. The SC-type optical fiber connector according to claim 7, wherein: the first positioning portion of the anti-rotation surface is a regular and irregular polygonal cylinder, and the second positioning portion is adapted to the shape of the cylinder. hole.