Through-wall optical fiber connector

Abstract

The invention 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 present invention relates to the technical field of optical fiber communication, and in particular to a through-the-wall optical fiber connector. Background Art

[0002] Fiber optic connectors play a vital role in modern communication and data transmission systems. Fiber optic connectors are devices used to connect two optical fibers. They can precisely dock the end faces of optical fibers to achieve the transmission of optical signals. With the development of science and technology, fiber optic connectors are applied to every household. In actual household installation, fiber optic connectors often need to be installed through walls. In order to facilitate installation through walls, through-the-wall fiber optic connectors are specially designed in the prior art. Compared with conventional fiber optic connectors, through-the-wall fiber optic connectors are equipped with traction sheaths. The traction sheaths can replace the outer shell structure of the fiber optic connector. When installing through the wall, the traction sheath is installed outside the connector body. The operator can pass the fiber through the traction sheath from one side of the wall and pull the fiber out from the other side. After the wall is penetrated, the traction sheath can be removed and replaced with the outer shell structure.

[0003] However, during the pulling process, the traction sheath may be twisted, and the optical fiber cable will be twisted, causing damage to the cable. When the cable is twisted excessively, it may also cause the cable to become tangled, making it impossible to pass through the wall. In this way, the operator needs to straighten the cable before passing it through the wall, which greatly affects work efficiency. Summary of the invention

[0004] The main purpose of the present invention is to provide a through-the-wall optical fiber connector, which is intended to facilitate the through-the-wall installation of the optical fiber connector.

[0005] To achieve the above object, the present invention provides a through-the-wall optical fiber connector, comprising:

[0006] A connector body, one end of which is provided with a mounting hole, the mounting hole being used for mounting an optical fiber cable;

[0007] A pulling sheath, the pulling sheath comprising a pulling head and an assembly, one end of the assembly being detachably mounted on the other end of the connector body away from the mounting hole, one end of the pulling head being rotatably connected to the end of the assembly away from the connector body, and the pulling head being coaxially arranged with the mounting hole; and

[0008] The housing structure and the pulling sheath are replaceably mounted on the connector body.

[0009] In some embodiments of the present invention, the assembly body is provided with an internal threaded hole, and the other end of the connector body is provided with an external thread that cooperates with the internal threaded hole of the assembly body.

[0010] In some embodiments of the present invention, the assembly body includes an assembly sleeve and a stopper, one end of the assembly sleeve is detachably connected to an end of the connector body away from the mounting hole, and an assembly opening is formed on the outer peripheral wall of the other end of the assembly sleeve;

[0011] An annular groove is formed on the outer peripheral wall of one end of the pulling head. The pulling head can be rotatably inserted into the other end of the assembly sleeve. The limiting member is installed at the assembly opening and is axially limited in the annular groove of the sleeve.

[0012] In some embodiments of the present invention, the assembly opening is extended along the circumference of the assembly sleeve, and two limiting notches are recessed on two edges of the assembly opening in the axial direction of the assembly sleeve;

[0013] The limiting member is a limiting semi-ring, and limiting protrusions are correspondingly arranged at both ends of the limiting semi-ring. The limiting member is installed on the assembly opening, and the limiting protrusions are inserted or clamped in the limiting notch.

[0014] In some embodiments of the present invention, a first stop protrusion is disposed on the inner wall surface of the assembly sleeve, and the first stop protrusion is located on a side of the assembly opening away from the pulling head to limit the axial movement of the pulling head.

[0015] In some embodiments of the present invention, a pulling eye is radially provided through one end of the pulling head away from the assembly body.

[0016] In some embodiments of the present invention, the shell structure includes an outer frame sleeve and a locking elastic arm integrally formed on the outer wall of the outer frame sleeve, the outer frame sleeve is sleeved on the connector body, and the locking elastic arm is used to be clamped with an external adapter.

[0017] In some embodiments of the present invention, the shell structure also includes an unlocking elastic arm, which is integrally formed with the outer wall surface of the outer frame sleeve and is arranged on the same side of the outer frame sleeve as the locking elastic arm, 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 present invention, the connector body includes an optical fiber sleeve and a ferrule, the mounting hole is formed at one end of the optical fiber sleeve, the ferrule is plugged into the other end of the optical fiber sleeve, and the outer peripheral wall of the ferrule exposed from the optical fiber sleeve is provided with an anti-fool groove;

[0019] The outer frame sleeve is clamped with the optical fiber sleeve, and an anti-fool protrusion is convexly provided on the inner wall surface of the outer frame sleeve, and the anti-fool protrusion cooperates with the anti-fool groove to limit position.

[0020] In some embodiments of the present invention, a stop ring is convexly provided on the outer peripheral wall of the ferrule exposed in the optical fiber sleeve, and the fool-proof groove is concavely formed on the peripheral wall of the stop ring; a second stop protrusion is also convexly provided on the inner wall of the optical fiber sleeve to limit the movement of the ferrule in a direction away from the optical fiber sleeve, and the fool-proof protrusion is formed on the top surface of the second stop protrusion;

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

[0022] In the technical solution of the present invention, the traction sheath of the through-the-wall optical fiber connector includes a pulling head and an assembly body. The assembly body is detachably mounted on one end of the connector body opposite to the mounting hole. The pulling head is rotatably connected to the assembly body. In this way, during the through-the-wall installation process, the operator can pull the optical fiber through the pulling head. Since the pulling head and the assembly body can rotate relative to each other, the torque applied to the pulling head cannot be transmitted to the assembly body. The pulling head is coaxially arranged with the mounting hole, which avoids the pulling head from rotating around the axis of the mounting hole. Through the combination of the above solutions, the problem of the optical fiber being damaged or even tangled due to twisting is avoided. This can ensure the quality of the optical fiber cable and the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of the optical fiber connector provided by the present invention when the pulling sheath is installed on the connector body;

[0025] Figure 2 A schematic diagram of the structure of the optical fiber connector provided by the present invention when the housing structure is installed to the connector body;

[0026] Figure 3 An exploded view of an embodiment of an optical fiber connector provided by the present invention;

[0027] Figure 4 An exploded view of a pulling sheath in an optical fiber connector provided by the present invention;

[0028] Figure 5 A cross-sectional view of the optical fiber connector provided by the present invention when the pulling sheath is installed to the connector body;

[0029] Figure 6A cross-sectional view of the optical fiber connector provided by the present invention when the housing structure is installed to the connector body;

[0030] Figure 7 A cross-sectional view of another embodiment of the optical fiber connector provided by the present invention;

[0031] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0032] Description of Figure Numbers:

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

[0034] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention 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 status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] See also Figures 1 to 6 The present invention proposes a through-the-wall fiber optic connector 100, which is generally an LC fiber optic connector. The LC fiber optic connector single-mode transmission can provide higher bandwidth over a longer distance and can be quickly terminated. In this type of connector, the inclined physical contact alignment has the advantage of reducing back reflection due to a certain degree of angle polishing of the connection surface. Therefore, this type of connector is usually the first choice, and of course other types of connectors, such as SC connectors, can be set according to specific circumstances and are not limited here.

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

[0040] In the technical solution of the present invention, the traction sheath 12 of the through-the-wall optical fiber connector 100 includes a pulling head 121 and an assembly body 122. The assembly body 122 is detachably mounted on one end of the connector body 11 opposite to the mounting hole 111. The pulling head 121 is rotatably connected to the assembly body 122. In this way, during the through-the-wall installation process, the operator can pull the optical fiber through the pulling head 121. Since the pulling head 121 and the assembly body 122 can rotate relative to each other, the torque applied to the pulling head 121 cannot be transmitted to the assembly body 122. The pulling head 121 is coaxially arranged with the mounting hole 111, thereby preventing the pulling head 121 from rotating around the axis of the mounting hole 111. Through the combination of the above solutions, the problem of the optical fiber being damaged or even tangled due to twisting is avoided. This can not only ensure the quality of the optical fiber cable 200, but also ensure the installation efficiency.

[0041] In the above-mentioned traction sheath 12, the pulling head 121 and the assembly body 122 are generally made of plastic material. The shape of the assembly body 122 is generally a long cylindrical strip, which is compatible with the appearance of the connector body 11. It can also be a flat cover shape. There are many specific implementation methods for the rotational connection between the pulling head 121 and the assembly body 122. In some embodiments of the present invention, the assembly body 122 is a cover body, and the cover body is formed with an assembly groove. The bottom wall of the assembly groove is provided with a through hole. One end of the pulling head 121 passes through the through hole from the assembly groove, and the other end of the pulling head 121 is set with an enlarged outer diameter to be limited in the assembly groove, and the side wall of the assembly groove cooperates with the connector body 11.

[0042] There are many ways to detachably connect the assembly 122 and the connector body 11, such as snap-on, plug-in, etc. In some embodiments of the present invention, the assembly 122 is provided with an internal threaded hole 1221, and the other end of the connector body 11 is provided with an external thread, which cooperates with the internal threaded hole 1221 of the assembly 122. The threaded connection has a high connection strength, and when the cable is pulled by the pulling head 121, it can effectively prevent the pulling head 121 from loosening from the connector body 11.

[0043] In some embodiments of the present invention, the assembly body 122 includes an assembly sleeve 1220 and a limit member 123, one end of the assembly sleeve 1220 is detachably connected to the end of the connector body 11 away from the mounting hole 111, and the outer peripheral wall of the other end of the assembly sleeve 1220 is provided with an assembly port 1222; the outer peripheral wall of one end of the pulling head 121 is provided with an annular groove 1211, and the pulling head 121 can be rotatably inserted in the other end of the assembly sleeve 1220, and the limit member 123 is installed in the assembly port 1222 and is limited in the axial direction of the sleeve within the annular groove 1211.

[0044] In the above scheme, during assembly, it is only necessary to first insert the pulling head 121 into the assembly sleeve 1220 and insert the limiter 123 into the annular groove 1211 through the assembly opening 1222. The limiter 123 can limit the axial movement of the pulling head 121 without limiting its rotation around the axis, thereby preventing the pulling head 121 from falling off.

[0045] In some embodiments of the present invention, the assembly opening 1222 is extended along the circumference of the assembly sleeve 1220, and the assembly opening 1222 is concavely provided with two limiting notches 1223 on the two edges of the assembly sleeve 1220 in the axial direction; the limiting member 123 is a limiting semi-ring, and limiting protrusions 1231 are correspondingly provided at both ends of the limiting semi-ring. The limiting member 123 is installed in the assembly opening 1222, and the limiting protrusions 1231 are inserted or clamped in the limiting notches 1223. After the limiting semi-ring is installed in the assembly tower, it does not protrude outward, which can avoid being stuck on the wall hole wall during the wall penetration process. The limiting protrusions 1231 are correspondingly provided at both ends of the limiting semi-ring, which are used to cooperate with the limiting notches 1223 on the assembly sleeve 1220 to ensure the fixation of the limiting member 123 and the limiting of the pulling head 121, and the structural stability is higher. The installation method of the limiting semi-ring is simple, which is convenient for quick installation and maintenance, and improves the installation efficiency and maintenance convenience of the entire connector.

[0046] In some embodiments of the present invention, 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, further improving the structural stability, but also, when assembling the pulling head 121, the stop protrusion can limit the pulling head 121, so that the pulling head 121 is quickly positioned to the position where the annular groove 1211 and the assembly opening 1222 are aligned.

[0047] In order to facilitate the user to pull through the wall, in some embodiments of the present invention, a pull eye 1212 is radially provided at one end of the pulling head 121 away from the assembly body 122. On the one hand, the problem that the pulling head 121 is smooth and easy to slip out of the hand when directly pulled can be avoided. On the other hand, the pull eye 1212 can also be used for threading, and the operator can pull the optical fiber cable 200 by pulling the wire.

[0048] See also Figure 7 and Figure 8In some embodiments of the present invention, the assembly 122 is a mounting sleeve 122', one end of the mounting sleeve 122' is detachably connected to the end of the connector body 1111 away from the mounting hole 111111, and the inner wall surface of the other end is provided with a mounting groove 1225, and the mounting groove 1225 extends in a ring shape along the circumference of the mounting sleeve 122'; a limiting flange 1213 is convexly provided on the peripheral wall of one end of the pulling head 121, and the limiting flange 1213 surrounds the outer periphery of the pulling head 121, and the limiting flange 1213 surrounds the outer periphery of the pulling head 121, and the limiting flange 1213 is provided on the inner wall surface of the other end of the connector body 1111. The outer diameter of the flange 1213 is gradually increased 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 peripheral surface of the limiting flange 1213 is interference fit with the end of the mounting sleeve 122'. After the limiting flange 1213 is aligned in the mounting groove 1225, the axial end wall of the limiting flange 1213 abuts against the groove wall of the mounting groove 1225, thereby effectively limiting the pulling head 121 from escaping from the mounting sleeve 122'.

[0049] The shell structure 13 can be a split structure or an integrated structure. In some embodiments of the present invention, the shell structure 13 includes an outer frame sleeve 131 and a locking elastic arm 132 integrally formed on the outer wall of the outer frame sleeve 131. The outer frame sleeve 131 is mounted on the connector body 11, and the locking elastic arm 132 is used to engage with the external adapter. In this way, the shell is set as an integrated structure. After the optical fiber cable 200 is pulled into place, only a single shell structure 13 needs to be assembled, which is more convenient and reduces the manufacturing cost and assembly complexity. In addition, the design of the outer frame sleeve 131 and the locking elastic arm 132 being integrally formed can achieve a stable connection with the connector body 11 and ensure a stable connection with the external adapter.

[0050] For ease of use, in some embodiments of the present invention, the housing structure 13 further includes an unlocking elastic arm 133, which is integrally formed and connected to the outer wall of the outer frame sleeve 131, and is disposed on the same side of the outer frame sleeve 131 as the locking elastic arm 132, 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 unplugs the optical fiber connector from the external adapter, the unlocking elastic arm 133 can be pressed against the locking elastic arm 132 by pressing the unlocking elastic arm 133, thereby achieving unlocking. Since the unlocking elastic arm 133 is exposed outside the adapter in a larger area, it is more convenient for the operator to press.

[0051] In some embodiments of the present invention, the connector body 11 includes an optical fiber sleeve 112 and a core 113, the mounting hole 111 is formed at one end of the optical fiber sleeve 112, the core 113 is plugged into the other end of the optical fiber sleeve 112, and the outer peripheral wall of the core 113 exposed in the optical fiber sleeve 112 is provided with an anti-idiot groove 1132; the outer frame sleeve 131 is snap-fitted with the optical fiber sleeve 112, and the inner wall surface of the outer frame sleeve 131 is convexly provided with an anti-idiot protrusion 1311, and the anti-idiot protrusion 1311 cooperates with the anti-idiot groove 1132 to limit. In the above scheme, by providing the anti-idiot groove 1132 and the anti-idiot protrusion 1311, incorrect assembly can be prevented to ensure that the core 113 and the optical fiber sleeve 112 are correctly connected. The outer frame sleeve 131 is connected to the optical fiber sleeve 112 by snapping, which is simple and stable, and easy to install and disassemble.

[0052] In some embodiments of the present invention, a limit ring 1131 is convexly provided on the outer peripheral wall of the ferrule 113 exposed from the optical fiber sleeve 112, and an anti-foolproof groove 1132 is concavely formed on the peripheral wall of the limit ring 1131; the inner wall of the optical fiber sleeve 112 is also convexly provided with a second stop protrusion 1312 to limit the movement of the ferrule 113 in a direction away from the optical fiber sleeve 112, and the anti-foolproof protrusion 1311 is formed on the top surface of the second stop protrusion 1312; the connector body 11 also includes a compression spring 114, which is compressed between the second stop protrusion 1312 and the end face of the optical fiber sleeve 112.

[0053] The installation accuracy and operation safety of the optical fiber connector are improved by providing a limit ring 1131 and a second stop protrusion 1312 between the ferrule 113 and the optical fiber sleeve 112, and introducing an anti-fool protrusion 1311 and an anti-fool groove 1132 between the optical fiber sleeve 112 and the outer frame sleeve 131. At the same time, the design of the compression spring 114 provides additional stability for the ferrule 113, which can prevent the ferrule 113 from loosening.

[0054] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A through-the-wall optical fiber connector (100), characterized in that: include: A connector body (11), one end of the connector body (11) being provided with a mounting hole (111), the mounting hole (111) being used for mounting an optical fiber cable (200); A pulling sheath (12), the pulling sheath (12) comprising a pulling head (121) and an assembly (122), one end of the assembly (122) being detachably mounted on 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 (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) and the traction sheath (12) are replaceably mounted on the connector body (11).

2. The through-the-wall optical fiber connector (100) according to claim 1, characterized in that: The assembly body (122) is provided with an internal thread hole (1221), and the other end of the connector body (11) is provided with an external thread, which cooperates with the internal thread hole (1221) of the assembly body (122).

3. The through-the-wall optical fiber connector (100) according to claim 1, characterized in that: The assembly body (122) comprises an assembly sleeve (1220) and a stopper (123); one end of the assembly sleeve (1220) is detachably connected to an end of the connector body (11) away from the mounting hole (111); and an assembly opening (1222) is provided on the outer peripheral wall of the other end of the assembly sleeve (1220); An annular groove (1211) is formed on the outer peripheral wall of one end of the pulling head (121), and the pulling head (121) can be rotatably inserted into the other end of the assembly sleeve (1220). The limiting member (123) is installed in the assembly opening (1222) and is axially limited in the annular groove (1211) of the sleeve.

4. The through-the-wall optical fiber connector (100) according to claim 3, characterized in that: The assembly opening (1222) is arranged to extend along the circumference of the assembly sleeve (1220), and two limiting notches (1223) are recessed on two edges of the assembly opening (1222) in the axial direction of the assembly sleeve (1220); The limiting member (123) is a limiting semi-ring, and limiting protrusions (1231) are correspondingly provided at both ends of the limiting semi-ring. The limiting member (123) is installed in the assembly opening (1222), and the limiting protrusion (1231) is inserted or clamped in the limiting notch (1223).

5. The through-the-wall optical fiber connector (100) according to claim 3, characterized in that: 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 a side of the assembly opening (1222) away from the pulling head (121) to limit the axial movement of the pulling head (121).

6. The through-the-wall optical fiber connector (100) according to claim 1, characterized in that: An end of the pulling head (121) away from the assembly body (122) is provided with a pulling eye (1212) penetrating in the radial direction.

7. The through-the-wall optical fiber connector (100) according to any one of claims 1 to 6, characterized in that: The outer shell structure (13) comprises 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 body (11); and the locking elastic arm (132) is used for clamping with an external adapter.

8. The through-the-wall optical fiber connector (100) according to claim 7, characterized in that: The shell structure (13) further comprises an unlocking elastic arm (133), wherein the unlocking elastic arm (133) is integrally formed and connected to the outer wall surface of the outer frame sleeve (131), and is arranged on the same side of the outer frame sleeve (131) as the locking elastic arm (132), and the free end of the unlocking elastic arm (133) abuts against the free end of the locking elastic arm (132).

9. The through-the-wall optical fiber connector (100) according to claim 7, characterized in that: The connector body (11) comprises an optical fiber sleeve (112) and a core plug (113); the mounting hole (111) is formed at one end of the optical fiber sleeve (112); the core plug (113) is plugged into the other end of the optical fiber sleeve (112); and an anti-mistake groove (1132) is provided on the outer peripheral wall of the core plug (113) exposed from the optical fiber sleeve (112); The outer frame sleeve (131) is snap-connected with the optical fiber sleeve (112); an anti-mistake protrusion (1311) is convexly provided on the inner wall surface of the outer frame sleeve (131); and the anti-mistake protrusion (1311) cooperates with the anti-mistake groove (1132) to limit position.

10. The through-the-wall optical fiber connector (100) according to claim 9, characterized in that: The outer peripheral wall of the ferrule (113) exposed from the optical fiber sleeve (112) is convexly provided with a limit ring (1131), and the peripheral wall of the limit ring (1131) is concavely provided with the anti-fool groove (1132); the inner wall of the optical fiber sleeve (112) is also convexly provided with a second stop protrusion (1312) to limit the movement of the ferrule (113) in a direction away from the optical fiber sleeve (112), and the anti-fool protrusion (1311) is formed on the top surface of the second stop protrusion (1312); The connector body (11) further comprises a compression spring (114), wherein the compression spring (114) is compressed between the second stop protrusion (1312) and the end surface of the optical fiber sleeve (112).

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