Through-wall optical fiber connector

Abstract

The utility model discloses a through-wall optical fiber connector, which comprises a connector main body, a traction sheath and a shell structure, and is characterized in that one end of the connector main body is provided with a mounting hole, and the mounting hole is used for mounting an optical fiber cable; the traction sheath comprises a traction head and an assembly body, one end of the assembly body is detachably mounted at the other end, away from the mounting hole, of the connector main body, one end of the traction head is rotationally connected to the end, away from the connector main body, of the assembly body, and the traction head and the mounting hole are coaxially arranged; the housing structure and the traction sheath are replaceably mounted to the connector body. Through the combination of the scheme, the problem that the optical fiber is damaged and even knotted due to torsion is avoided, so that the quality of the optical fiber cable can be guaranteed, and the installation efficiency can also be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of optical fiber communication technology, especially a wall -penetrating optical fiber connector. BACKGROUND

[0002] The optical fiber connector plays a vital role in modern communication and data transmission system, and it is a device for connecting two optical fibers, which can precisely butt joint the end face of the optical fiber to realize the transmission of optical signal. With the development of science and technology, optical fiber connectors are applied to each family, and in actual household installation, the optical fiber connector often needs to be wall -penetrating, in order to facilitate wall -penetrating installation, the prior art is specially designed with wall -penetrating optical fiber connector, compared with the conventional optical fiber connector, the wall -penetrating optical fiber connector is matched with a traction sheath, the traction sheath can replace the shell structure of the optical fiber connector, when wall -penetrating installation, the traction sheath is installed outside the connector main body, the operator can pass in from one side of the wall through the traction sheath, and pull out the optical fiber from the other side, after wall -penetrating, the traction sheath can be removed and the shell structure is replaced.

[0003] However, in the pulling process, the traction sheath may be twisted, at this time the optical fiber cable will be twisted, which will damage the cable, and when the cable is twisted too much, it will also cause the cable to knot, which will cause the wall -penetrating, so the operator needs to straighten the line before wall -penetrating, which greatly affects the work efficiency. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a wall -penetrating optical fiber connector, which facilitates wall -penetrating installation of the optical fiber connector.

[0005] To achieve the above purpose, the utility model provides a wall -penetrating optical fiber connector, which comprises:

[0006] The connector main body is provided with a mounting hole at one end, and the mounting hole is used for mounting the optical fiber cable;

[0007] The traction sheath comprises a traction head and an assembly body, one end of the assembly body is detachably installed on the other end of the connector main body away from the mounting hole, one end of the traction head is rotatably connected to the end of the assembly body away from the connector main body, and the traction head is coaxially arranged with the mounting hole; and

[0008] The shell structure is replaceably installed on the connector main body with the traction sheath.

[0009] In some embodiments of the utility model, the assembly body is provided with an internal thread hole, and the other end of the connector main body is provided with an external thread and cooperates with the internal thread hole of the assembly body.

[0010] In some embodiments of the utility model, the assembly body includes assembly sleeve and limiting piece, one end of assembly sleeve is detachable connection with the end of connector main body far from the mounting hole, the outer peripheral wall of the other end of assembly sleeve is provided with assembly port,

[0011] The outer peripheral wall of one end of the pulling head is provided with a ring groove, the pulling head is rotatably inserted into the other end of the assembly sleeve, the limiting piece is installed in the assembly port and is limited in the ring groove in the axial direction of the sleeve.

[0012] In some embodiments of the utility model, the assembly port is arranged along the circumference of the assembly sleeve, and two limiting notches are recessed in the two edges of the assembly port in the axial direction of the assembly sleeve.

[0013] The limiting piece is a limiting half ring, limiting protrusions are correspondingly arranged at the two ends of the limiting half ring, the limiting piece is installed in the assembly port, and the limiting protrusions are inserted or clamped in the limiting notches.

[0014] In some embodiments of the utility model, the inner wall surface of the assembly sleeve is provided with a first stop protrusion, the first stop protrusion is located on the side of the assembly port away from the pulling head to limit the axial movement of the pulling head.

[0015] In some embodiments of the utility model, a pull eye is provided in the end of the pulling head away from the assembly body and penetrates in the radial direction.

[0016] In some embodiments of the utility model, the shell structure includes an outer frame sleeve and a locking elastic arm integrally formed on the outer wall surface of the outer frame sleeve, the outer frame sleeve is sleeved on the connector main body, and the locking elastic arm is used for clamping with an external adapter.

[0017] In some embodiments of the utility model, the shell structure further includes an unlocking elastic arm, the unlocking elastic arm is integrally connected to the outer wall surface of the outer frame sleeve and is located on the same side of the locking elastic arm in the outer frame sleeve, and the free end of the unlocking elastic arm abuts against the free end of the locking elastic arm.

[0018] In some embodiments of the utility model, the connector main body includes an optical fiber sleeve and a ferrule, the mounting hole is formed in one end of the optical fiber sleeve, the ferrule is inserted into the other end of the optical fiber sleeve, and the ferrule is provided with an anti-fool groove on the outer peripheral wall of the optical fiber sleeve.

[0019] The outer frame sleeve is clamped with the optical fiber sleeve, the inner wall surface of the outer frame sleeve is provided with an anti-fool protrusion, and the anti-fool protrusion is limited in cooperation with the anti-fool groove.

[0020] In some embodiments of the utility model, the limit ring is convex on the outer circumferential wall of the fiber sleeve, and the anti -fool groove is formed in the circumferential wall of the limit ring;The inner wall of the fiber sleeve is also provided with a second stop protrusion, so as to limit the movement of the plug-in core away from the fiber sleeve, and the anti -fool protrusion is formed on the top surface of the second stop protrusion;

[0021] The connector body further comprises a compression spring, which is compressed between the second stop protrusion and the end face of the fiber sleeve.

[0022] In the technical scheme of the utility model, the pulling sheath of the wall -penetrating fiber connector comprises a pulling head and an assembly body, the assembly body is detachably installed at one end of the connector body relative to the mounting hole, and the pulling head is rotationally connected to the assembly body, so that the operator can pull the fiber through the pulling head during the wall -penetrating installation process, and since the pulling head and the assembly body can rotate relative to each other, the torsion force received by the pulling head cannot be transmitted to the assembly body, and the pulling head is coaxially arranged with the mounting hole, avoiding the rotation of the pulling head around the axis of the mounting hole, and through the combination of the above scheme, the problem of fiber damage or even knotting due to torsion is avoided, so that the quality of the fiber cable can be guaranteed, and the installation efficiency can be guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings from the structures shown in the drawings without creating labor.

[0024] Figure 1 The structure schematic view of the fiber connector provided by the utility model when the pulling sheath is installed to the connector body;

[0025] Figure 2 The structure schematic view of the fiber connector provided by the utility model when the shell structure is installed to the connector body;

[0026] Figure 3 The exploded view of an embodiment of the fiber connector provided by the utility model;

[0027] Figure 4 The exploded view of the pulling sheath in the fiber connector provided by the utility model;

[0028] Figure 5 The sectional view of the fiber connector provided by the utility model when the pulling sheath is installed to the connector body;

[0029] Figure 6The cross-sectional view of the optical fiber connector provided by the utility model is shown when the shell structure is installed to the connector main body.

[0030] Figure 7 The cross-sectional view of another embodiment of the optical fiber connector provided by the utility model is shown.

[0031] Figure 8 For Figure 7 The enlarged view of A in the middle.

[0032] Explanation of reference numerals:

[0033] 100, wall-penetrating optical fiber connector; 11, connector main body; 111, mounting hole; 112, optical fiber sleeve; 113, ferrule; 1131, limiting ring; 1132, fool-proof groove; 114, compression spring; 12, traction sheath; 121, traction head; 1211, annular groove; 1212, pull eye; 1213, limiting flange; 122, assembly body; 1220, assembly sleeve; 1221, internally threaded hole; 1222, assembly opening; 1223, limiting notch; 1224, first stop protrusion; 122', mounting sleeve; 1225, mounting groove; 123, limiting member; 1231, limiting protrusion; 13, shell structure; 131, outer frame sleeve; 1311, fool-proof protrusion; 1312, second stop protrusion; 132, locking elastic arm; 133, unlocking elastic arm; 200, optical fiber cable.

[0034] The utility model aims to realize, function characteristics and advantages will combine embodiment, refer to the further description of the drawings. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0036] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0037] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the same or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0038] Please refer to Figures 1 to 6 The utility model provides a kind of through-wall optical fiber connector 100, the optical fiber connector is generally LC optical fiber connector, LC optical fiber connector single-mode transmission can provide higher bandwidth on longer distance, and can be quickly terminated.In such connector, the inclined physical contact alignment has the advantage of reducing back reflection because the connection surface is polished at a certain angle.Therefore, such connector is usually the first choice, of course, it can also be other types of connectors, such as SC connector, can be set according to specific circumstances, not limited here.

[0039] The through-wall optical fiber connector 100 in the utility model includes connector main body 11, traction sheath 12 and shell structure 13, wherein one end of connector main body 11 is provided with mounting hole 111, and mounting hole 111 is used for installing optical fiber cable 200; traction sheath 12 includes pulling head 121 and assembly body 122, one end of assembly body 122 is detachably installed on the other end of connector main body 11 away from mounting hole 111, one end of pulling head 121 is rotatably connected to the end of assembly body 122 away from connector main body 11, and pulling head 121 is coaxially arranged with mounting hole 111; shell structure 13 and traction sheath 12 are replaceably installed on connector main body 11.

[0040] The utility model discloses a technical scheme, the traction sheath 12 of through -wall type optical fiber connector 100 includes the traction head 121 and the assembly body 122, and the assembly body 122 detachably installs to the one end of connector main body 11 relative mounting hole 111, and the traction head 121 rotationally connects the assembly body 122, so that during the operator installs the process of going through the wall, can pull the optical fiber through the traction head 121, since the traction head 121 and the assembly body 122 can relatively rotate, so that the torsion that the traction head 121 received cannot be conducted to the assembly body 122, and the traction head 121 and mounting hole 111 coaxially set up, avoided the traction head 121 around the rotation of mounting hole 111 axis, through the combination of above-mentioned scheme, avoided the problem that the optical fiber is damaged and even knotted by torsion, so that can guarantee the quality of optical fiber cable 200, and can guarantee installation efficiency.

[0041] In the traction sheath 12, the traction head 121 and the assembly body 122 generally adopt plastic material, the shape of the assembly body 122 is generally long strip-shaped cylinder, and is adapted to the appearance of the connector main body 11, and can also be flat cover, the specific implementation mode of the rotationally connected traction head 121 and the assembly body 122 has multiple, in some embodiments of the utility model, the assembly body 122 is a cover body, the cover body is formed with an assembly groove, a through hole is formed in the bottom wall of the assembly groove, one end of the traction head 121 passes through the through hole from the assembly groove, the other end of the traction head 121 is increased in diameter to be limited in the assembly groove, and the side wall of the assembly groove is matched with the connector main body 11.

[0042] The detachable connection mode of the assembly body 122 and the connector main body 11 has multiple, can be clamped, inserted and the like, in some embodiments of the utility model, the assembly body 122 is provided with an internal thread hole 1221, and the other end of the connector main body 11 is provided with an external thread and is matched with the internal thread hole 1221 of the assembly body 122. The connection strength is higher through the thread connection mode, when the cable is pulled through the traction head 121, the traction head 121 and the connector main body 11 can be effectively prevented from loosening.

[0043] In some embodiments of the utility model, the assembly body 122 includes an assembly sleeve 1220 and a limiting piece 123, one end of the assembly sleeve 1220 is detachably connected with the end of the connector main body 11 away from the mounting hole 111, and an assembly opening 1222 is formed in the outer peripheral wall of the other end of the assembly sleeve 1220; a circumferential groove 1211 is formed in the outer peripheral wall of one end of the traction head 121, the traction head 121 is rotatably inserted into the other end of the assembly sleeve 1220, and the limiting piece 123 is installed in the assembly opening 1222 and limited in the circumferential groove 1211 in the axial direction of the sleeve.

[0044] In the above scheme, during assembly, only the pulling head 121 is inserted into the assembly sleeve 1220, and the limiting piece 123 is clamped into the annular groove 1211 from the assembly opening 1222, so that the axial movement of the pulling head 121 is limited, and the rotation of the pulling head 121 around the shaft is not limited, thereby preventing the pulling head 121 from falling off.

[0045] In some embodiments of the present application, the assembly opening 1222 extends along the circumference of the assembly sleeve 1220, and two limiting notches 1223 are recessed on the two edges of the assembly opening 1222 in the axial direction of the assembly sleeve 1220; the limiting piece 123 is a limiting half-ring, and limiting protrusions 1231 are correspondingly arranged at both ends of the limiting half-ring. The limiting piece 123 is installed in the assembly opening 1222, and the limiting protrusions 1231 are inserted or clamped in the limiting notches 1223. The limiting half-ring is not protruding after being installed in the assembly sleeve, which can avoid being clamped on the hole wall of the wall during the wall-penetrating process. Limiting protrusions 1231 are correspondingly arranged at both ends of the limiting half-ring, and the protrusions are used to cooperate with the limiting notches 1223 on the assembly sleeve 1220 to ensure the fixation of the limiting piece 123 and the limiting of the pulling head 121, thereby achieving higher structural stability. The installation method of the limiting half-ring is simple, which facilitates quick installation and maintenance, and improves the installation efficiency and maintenance convenience of the entire connector.

[0046] In some embodiments of the present application, the inner wall surface of the assembly sleeve 1220 is provided with a first stop protrusion 1224, and the first stop protrusion 1224 is located on the side of the assembly opening 1222 away from the pulling head 121 to limit the axial movement of the pulling head 121. The stop protrusion not only limits the pulling head 121, but also further improves the structural stability. When the pulling head 121 is assembled, the stop protrusion can limit the pulling head 121, so that the pulling head 121 is quickly positioned at the alignment position of the annular groove 1211 and the assembly opening 1222.

[0047] In order to facilitate the user to pull through the wall, in some embodiments of the present application, a pulling eye 1212 is provided on the end of the pulling head 121 away from the assembly body 122 and penetrates in the radial direction. On the one hand, the surface of the pulling head 121 can be avoided to be smooth, and the problem of easy hand-off during direct pulling can be avoided. On the other hand, the pulling eye 1212 can also be used for threading, and the operator can pull the optical fiber cable 200 by pulling the wire.

[0048] Please refer to Figure 7 and Figure 8In some embodiments of the utility model, the assembly 122 is a mounting sleeve 122', one end of the mounting sleeve 122' is detachably connected with the connector main body 1111 away from one end of the mounting hole 111111, and the inner wall surface of the other end is provided with a mounting groove 1225, the mounting groove 1225 extends along the circumference of the mounting sleeve 122' and is annular; the circumferential wall of one end of the pulling head 121 is provided with a limiting flange 1213, the limiting flange 1213 surrounds the outer circumference of the pulling head 121, and the outer diameter of the limiting flange 1213 gradually increases in the direction close to the other end of the pulling head 121, so that when the pulling head 121 is inserted into the mounting sleeve 122', the outer circumferential surface of the limiting flange 1213 is in interference fit with the end of the mounting sleeve 122', and after the limiting flange 1213 is aligned into the mounting groove 1225, the end wall of the limiting flange 1213 in the axial direction abuts against the groove wall of the mounting groove 1225, thereby effectively limiting the pulling head 121 from being pulled out of the mounting sleeve 122'.

[0049] The shell structure 13 can be a split structure or an integral structure, in some embodiments of the utility model, the shell structure 13 includes an outer frame sleeve 131 and a locking elastic arm 132 integrally formed on the outer wall surface of the outer frame sleeve 131, the outer frame sleeve 131 is sleeved on the connector main body 11, and the locking elastic arm 132 is used for clamping with an external adapter. In this way, the shell is provided as an integral structure, after the optical fiber cable 200 is pulled into position, only a single shell structure 13 needs to be assembled, which is more convenient, and reduces manufacturing cost and assembly complexity, and moreover, the design that the outer frame sleeve 131 and the locking elastic arm 132 are integrally formed can realize stable connection with the connector main body 11 and ensure stable connection with the external adapter.

[0050] In order to facilitate use, in some embodiments of the utility model, the shell structure 13 further includes an unlocking elastic arm 133, the unlocking elastic arm 133 is integrally connected to the outer wall surface of the outer frame sleeve 131 and is located on the same side of the locking elastic arm 132 on the outer frame sleeve 131, and the free end of the unlocking elastic arm 133 abuts against the free end of the locking elastic arm 132. In this way, when the operator pulls down the optical fiber connector from the external adapter, the operator can press the unlocking elastic arm 133 to press the locking elastic arm 132, so as to realize unlocking, and since the unlocking elastic arm 133 is exposed outside the adapter and has a larger area, the operator is more convenient when pressing.

[0051] In some embodiments of the utility model, connector main part 11 includes optical fiber sleeve 112 and ferrule 113, mounting hole 111 is formed in one end of optical fiber sleeve 112, and ferrule 113 is inserted into the other end of optical fiber sleeve 112, and the outer wall of optical fiber sleeve 112 is provided with anti-fumble groove 1132; outer frame sleeve 131 is clamped with optical fiber sleeve 112, and the inner wall of outer frame sleeve 131 is provided with anti-fumble convex 1311, and anti-fumble convex 1311 is matched with anti-fumble groove 1132 to limit. In the above scheme, by setting anti-fumble groove 1132 and anti-fumble convex 1311, it can prevent wrong assembly and ensure that ferrule 113 and optical fiber sleeve 112 are correctly connected. Outer frame sleeve 131 is connected with optical fiber sleeve 112 by clamping, and this connection mode is simple and stable, and is convenient to install and disassemble.

[0052] In some embodiments of the utility model, the outer wall of ferrule 113 exposed to optical fiber sleeve 112 is provided with limiting ring 1131, the outer wall of limiting ring 1131 is concave and forms anti-fumble groove 1132; the inner wall of optical fiber sleeve 112 is also provided with second stop convex 1312 to limit the movement of ferrule 113 away from optical fiber sleeve 112, and anti-fumble convex 1311 is formed on the top surface of second stop convex 1312; connector main part 11 also includes compression spring 114, and compression spring 114 is compressed between the end surface of second stop convex 1312 and optical fiber sleeve 112.

[0053] By setting limiting ring 1131 and second stop convex 1312 between ferrule 113 and optical fiber sleeve 112, and introducing anti-fumble convex 1311 and anti-fumble groove 1132 between optical fiber sleeve 112 and outer frame sleeve 131, the installation accuracy and operation safety of the optical fiber connector are improved. At the same time, the design of compression spring 114 provides additional stability for ferrule 113, which can avoid the loosening of ferrule 113.

[0054] The above-mentioned is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by the utility model specification and the drawings contents, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A through-wall fiber optic connector (100), comprising: The utility model relates to a connector, which comprises: a connector body (11) having a mounting hole (111) at one end thereof for mounting an optical fiber cable (200); a pulling sheath (12) comprising a pulling head (121) and an assembly body (122), one end of the assembly body (122) being detachably mounted to the other end of the connector body (11) away from the mounting hole (111), one end of the pulling head (121) being rotatably connected to the end of the assembly body (122) away from the connector body (11), and the pulling head (121) being coaxially arranged with the mounting hole (111); and a housing structure (13) being replaceably mounted to the connector body (11) with the pulling sheath (12).

2. The wall-mounted fiber optic connector (100) of claim 1, wherein, The other end of the connector body (11) is provided with an external thread which cooperates with an internal thread hole (1221) of the assembly body (122).

3. The wall-mounted fiber optic connector (100) of claim 1, wherein, The assembly body (122) comprises an assembly sleeve (1220) and a limiting piece (123), one end of the assembly sleeve (1220) being detachably connected to the end of the connector body (11) away from the mounting hole (111), and an assembly opening (1222) being formed in the outer peripheral wall of the other end of the assembly sleeve (1220). One end of the pulling head (121) is provided with a circumferential groove (1211), the pulling head (121) being rotatably inserted into the other end of the assembly sleeve (1220), and the limiting piece (123) being mounted to the assembly opening (1222) and axially limited in the circumferential groove (1211).

4. The wall-mounted fiber optic connector (100) of claim 3, wherein, The assembly opening (1222) extends along the circumference of the assembly sleeve (1220), and two limiting notches (1223) are concavely formed in the two edges of the assembly opening (1222) in the axial direction of the assembly sleeve (1220). The limiting piece (123) is a limiting half ring, two limiting protrusions (1231) being correspondingly formed in the two ends of the limiting half ring, the limiting piece (123) being mounted to the assembly opening (1222), and the limiting protrusions (1231) being inserted or clamped into the limiting notches (1223).

5. The wall-mounted fiber optic connector (100) of claim 3, wherein, A first stop protrusion (1224) is formed in the inner wall of the assembly sleeve (1220), the first stop protrusion (1224) being located on the side of the assembly opening (1222) away from the pulling head (121) to limit the axial movement of the pulling head (121).

6. The wall-mounted fiber optic connector (100) of claim 1, wherein, A pulling eye (1212) is formed in the end of the pulling head (121) away from the assembly body (122) in the radial direction.

7. The wall-mounted fiber optic connector (100) of any one of claims 1-6, wherein, The housing structure (13) comprises an outer frame sleeve (131) and a locking elastic arm (132) integrally formed in the outer wall of the outer frame sleeve (131), the outer frame sleeve (131) being sleeved on the connector body (11), and the locking elastic arm (132) being used for clamping with an external adapter.

8. The wall-mounted fiber optic connector (100) of claim 7, wherein, The shell structure (13) further comprises an unlocking elastic arm (133) integrally connected to the outer wall surface of the outer frame sleeve (131) and arranged on the same side of the locking elastic arm (132) on the outer frame sleeve (131), and the free end of the unlocking elastic arm (133) abuts against the free end of the locking elastic arm (132).

9. The wall-mounted fiber optic connector (100) of claim 7, wherein, The connector body (11) comprises a fiber sleeve (112) and a ferrule (113), the mounting hole (111) is formed at one end of the fiber sleeve (112), and the ferrule (113) is inserted into the other end of the fiber sleeve (112), and the ferrule (113) is provided with a fool-proof groove (1132) on the outer peripheral wall of the fiber sleeve (112). The outer frame sleeve (131) is clamped with the fiber sleeve (112), and the inner wall surface of the outer frame sleeve (131) is provided with a fool-proof protrusion (1311), and the fool-proof protrusion (1311) is matched with the fool-proof groove (1132) to limit the position.

10. The wall-mounted fiber optic connector (100) of claim 9, wherein, The outer peripheral wall of the ferrule (113) exposed to the fiber sleeve (112) is provided with a limiting ring (1131), and the limiting ring (1131) is recessed to form the fool-proof groove (1132); the inner wall of the fiber sleeve (112) is further provided with a second stop protrusion (1312) to limit the movement of the ferrule (113) away from the fiber sleeve (112), and the fool-proof protrusion (1311) is formed on the top surface of the second stop protrusion (1312); The connector body (11) further comprises a compression spring (114), and the compression spring (114) is compressed between the second stop protrusion (1312) and the end surface of the fiber sleeve (112).

Images