Optical fiber distribution box and optical fiber connection system

Abstract

The application relates to optical fiber communication physical connection technology and discloses an optical fiber distribution box and an optical fiber connection system, which comprise a box body and a fastening assembly, the fastening assembly is detachably connected with a connecting part, the connecting part is fixedly arranged on the box body, the connecting part is provided with a first thread in the circumferential direction, and the inner wall of the connecting part is provided with a first annular platform in the circumferential direction; the fastening assembly comprises a plug, a limiting piece and a fixing piece, the end face diameter of one end of the plug close to the first annular platform is the same as the outer diameter of the first annular platform, an annular groove is arranged on the outer side wall of the other end of the plug away from the first annular platform in the circumferential direction; the limiting piece is provided with a plurality of limiting claws at one end away from the connecting part, and the limiting claws are spaced apart by a preset distance; and one end of the fixing piece is provided with a second thread matched with the first thread. The optical fiber distribution box can be installed conveniently while realizing the sealing effect, the influence of temperature change on the sealing effect is reduced, and the connection precision of optical fiber connection is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber communication physical connection, and particularly relates to an optical fiber distribution box and an optical fiber connection system. BACKGROUND

[0002] When connecting multiple user optical fiber cables, the trunk optical fiber cable can be inserted into the optical fiber distribution box, a trunk optical fiber cable is divided into multiple optical fiber branches by splitting, and each optical fiber branch is connected with an optical fiber adapter. When connecting optical fibers, the optical fiber connector is directly connected with the optical fiber adapter arranged in the optical fiber distribution box.

[0003] In order to avoid the influence of the external environment on the optical fiber distribution box and ensure the connection accuracy of the optical fiber connection of the optical fiber distribution box, the interfaces (including the optical fiber cable interface and the optical fiber adapter interface) of the optical fiber distribution box need to be sealed. At present, most of the optical fiber distribution boxes use the sealing method of arranging a sealing ring at the interface. However, in some high-temperature environments, the sealing ring is prone to deformation. After the deformation of the sealing ring, the sealing effect of the optical fiber distribution box is greatly reduced, thereby reducing the connection accuracy of the optical fiber connection in the optical fiber distribution box. On the other hand, the volume of the sealing ring is usually small, and it is easy to be lost or missed during assembly, resulting in inconvenience during installation.

[0004] Therefore, how to realize the sealing effect of the optical fiber distribution box while facilitating installation, reducing the influence of temperature changes on the sealing effect, and ensuring the connection accuracy of the optical fiber connection has become a technical problem to be solved. SUMMARY

[0005] The present application provides an optical fiber distribution box and an optical fiber connection system to realize the sealing effect of the optical fiber distribution box while facilitating installation, reducing the influence of temperature changes on the sealing effect, and ensuring the connection accuracy of the optical fiber connection.

[0006] In a first aspect, the present application provides a multi-core optical fiber connector, comprising a box body and a fastening assembly, the fastening assembly being detachably connected with a connecting part;

[0007] The connecting part is fixedly arranged on the box body and is provided with a first thread in the circumferential direction. The inner wall of the connecting part is provided with a first annular platform in the circumferential direction. The connecting part is a hollow structure and is in communication with the inside of the box body, so that the optical fiber can pass through the connecting part to enter or exit the optical fiber distribution box.

[0008] The fastening assembly comprises a plug, a limiting piece and a fixing piece, and the limiting piece and the fixing piece are hollow structures. Specifically:

[0009] The plug is provided with a through hole for the optical fiber cable to pass through and coaxial with the connecting part, the end face of the plug near one end of the first annular platform has the same diameter as the outer diameter of the first annular platform, and the outer side wall of the plug away from one end of the first annular platform is provided with an annular groove in the circumferential direction;

[0010] The limiting piece is provided with a plurality of limiting claws at one end away from the connecting part, each limiting claw is spaced apart by a preset distance, the limiting claws are matched with the annular groove to limit the plug;

[0011] One end of the fixing piece is provided with a second thread matched with the first thread, when the fixing piece is fastened and connected with the connecting part through the first thread and the second thread, the fixing piece is sleeved on the outside of the limiting piece, the limiting piece is sleeved on the plug away from one end of the connecting part, the limiting claws are interference matched with the annular groove, the end face of the plug near the annular platform is in abutment with the first annular platform and in an interference state.

[0012] Optionally, the box body is further provided with a plurality of mounting holes, the inner wall of the mounting hole is provided with a second annular platform in the circumferential direction.

[0013] Optionally, it further comprises a plug, the plug is detachably connected with the mounting hole, the diameter of one end of the plug near the mounting hole is less than or equal to the hole diameter of the mounting hole, and the plug is provided with an external thread, the diameter of one end of the plug away from the mounting hole is the same as the outer diameter of the second annular platform;

[0014] When the plug is fastened and connected with the mounting hole, one end of the plug near the mounting hole passes through the mounting hole into the inside of the box body and is threadedly connected with the box body, and the annular end face of one end of the plug away from the mounting hole is in abutment with the second annular platform.

[0015] Optionally, the plug comprises a plug body and a connecting platform with a preset height, the connecting platform and the plug body are integrally formed and the diameter of the connecting platform is greater than the diameter of the plug body, and the diameter of the plug body is less than or equal to the inner diameter of the limiting piece;

[0016] When the fixing piece is fastened and connected with the connecting part, the limiting piece is sleeved on the plug body, the end face of one end of the limiting piece near the connecting part is interference matched with the end face of one end of the connecting platform away from the first annular platform, and the end face of one end of the connecting platform near the first annular platform is in abutment with the annular platform and in an interference state.

[0017] Optionally, the limiting claw is provided with a limiting protrusion at one end away from the connecting part, and the limiting protrusion is matched with the annular groove;

[0018] When the fixing piece is fastened and connected with the connecting part, the limiting piece is sleeved on the plug, the limiting protrusion is located in the annular groove and is interference matched with the annular groove.

[0019] Optionally, the width of the annular groove decreases from the slot opening of the annular groove to the bottom surface of the annular groove.

[0020] Optionally, an abutting portion is arranged in the fixing member, and the abutting portion abuts against one end of the plug and / or the limiting member to limit the plug and / or the limiting member.

[0021] Optionally, the inner diameter of the fixing member decreases from the end of the fixing member close to the connecting portion to the abutting portion.

[0022] Optionally, the connecting portion and the annular platform are integrally arranged on the box body.

[0023] In a second aspect, the application provides an optical fiber connection system, comprising an optical fiber, an optical fiber adapter and an optical fiber distribution box as in the first aspect, wherein:

[0024] The optical fiber enters or exits the optical fiber distribution box through the connecting portion of the optical fiber distribution box and is fixedly connected with the optical fiber distribution box.

[0025] The optical fiber adapter is detachably connected with the optical fiber distribution box through the mounting hole of the optical fiber distribution box.

[0026] The application discloses an optical fiber distribution box and an optical fiber connection system, comprising a box body and a fastening assembly, the fastening assembly is detachably connected with the connecting portion; the box body is fixedly provided with the connecting portion, the connecting portion is provided with a first thread in the circumferential direction, and the inner wall of the connecting portion is provided with a first annular platform in the circumferential direction; the fastening assembly comprises a plug, a limiting member and a fixing member, the end face of the end of the plug close to the first annular platform has the same diameter as the outer diameter of the first annular platform, and the outer side wall of the end of the plug away from the first annular platform is provided with an annular groove in the circumferential direction; the limiting member is provided with a plurality of limiting claws at the end away from the connecting portion, and each limiting claw is spaced apart by a preset distance; and the fixing member is provided with a second thread at one end, which cooperates with the first thread. In the process of fastening connection of the fixing member and the connecting portion, the fixing member is sleeved outside the limiting member, and the limiting member is sleeved on the plug; as the connection tightness between the fixing member and the connecting portion increases, the fixing member constantly applies pressure to the limiting claws of the limiting member, so that the limiting claws are pressed in the annular groove and are in interference fit with the annular groove, thereby limiting the plug in the circumferential direction; at the same time, the fixing member also drives the limiting member to move in the direction of the connecting portion, so that the limiting member pushes the plug into the connecting portion and abuts against the first annular platform in the connecting portion and is in interference state, thereby limiting the plug in the axial direction; when the fixing member and the connecting portion are fastened and connected, the limiting claws are in interference fit with the annular groove, and the plug is also in interference fit with the first annular platform, thereby realizing sealing of the optical fiber distribution box and ensuring the connection accuracy of the optical fiber connection. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 A structural schematic diagram of an optical fiber connection system provided by an embodiment of the present application is shown in FIG. 1.

[0029] Figure 2 An exploded structural schematic diagram of an optical fiber distribution box provided by an embodiment of the present application is shown in FIG. 2.

[0030] Figure 3 An exploded structural diagram of a fastening assembly provided by an embodiment of the present application is shown in FIG. 3.

[0031] Figure 4 A scene schematic diagram of an optical fiber distribution box provided by an embodiment of the present application is shown in FIG. 4.

[0032] Figure 5a A plug structure schematic diagram provided by an embodiment of the present application is shown in FIG. 5.

[0033] Figure 5b Another plug structure schematic diagram provided by an embodiment of the present application is shown in FIG. 6.

[0034] Figure 6 Another scene schematic diagram of an optical fiber distribution box provided by an embodiment of the present application is shown in FIG. 7.

[0035] Figure 7 A structure schematic diagram of a plug provided by an embodiment of the present application is shown in FIG. 8.

[0036] Figure 8 A structure schematic diagram of a limiting piece provided by an embodiment of the present application is shown in FIG. 9.

[0037] Figure 9 A structure schematic diagram of a fixing piece provided by an embodiment of the present application is shown in FIG. 10. DETAILED DESCRIPTION

[0038] The present application will be described below based on the embodiments, but the present application is not limited to these embodiments. In the following detailed description of the present application, some specific details are described in detail, in order to avoid confusion of the essence of the present application, the well-known methods, processes, components are not described in detail.

[0039] In addition, those skilled in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0040] Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0041] In the description of the present application, it should be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not intended to indicate or imply relative importance.

[0042] Please refer to Figure 1 , Figure 1 A structural schematic diagram of an optical fiber connection system provided by an embodiment of the present application.

[0043] As Figure 1 shown in the figure, the optical fiber connection system 100 includes an optical fiber 10, an optical fiber adapter 20 and an optical fiber distribution box 30, wherein the optical fiber 10 penetrates into or out of the optical fiber distribution box 30 through a connecting part 11 of the optical fiber distribution box 30 and is fixedly connected with the optical fiber distribution box 30; the optical fiber adapter 20 is detachably connected with the optical fiber distribution box 30 through a mounting hole 14 of the optical fiber distribution box 30.

[0044] As Figure 2 shown in the figure, Figure 2 An exploded structural schematic diagram of an optical fiber distribution box provided by an embodiment of the present application. The optical fiber distribution box is the optical fiber distribution box 30 in the optical fiber connection system 100 shown in Figure 1 .

[0045] The optical fiber distribution box 30 includes a box body 1 and a fastening assembly 2, and the fastening assembly 2 is detachably connected with the connecting part 11.

[0046] The connecting part 11 is fixedly arranged on the box body 1 and is provided with a first thread 12 in the circumferential direction. The connecting part 11 can be arranged on the outer side wall of the box body 1 in a protruding manner or arranged inside the box body 1 in a recessed manner. The first thread 12 can be an internal thread or an external thread, and is preferably an external thread. It can be understood that when the connecting part 11 is arranged in a recessed manner inside the box body 1, the first thread 12 is an internal thread.

[0047] The inner wall of the connecting part 11 is provided with a first annular platform 13 in the circumferential direction, and the connecting part 11 is a hollow structure and communicates with the inside of the box body 1, so that the optical fiber 10 can penetrate into or out of the optical fiber distribution box 30 through the connecting part 11.

[0048] In some embodiments, the connecting portion 11, the annular platform 13 and the box body 1 are integrally formed. The integrally formed design can reduce the connection error between the connecting portion 11, the annular platform 13 and the box body 1, and the sealing effect is better.

[0049] Please refer to Figure 3 , Figure 3 The explosion structure diagram of the fastening assembly provided by the embodiments of the present application is shown in the figure. Figure 2 and Figure 3 The fastening assembly 2 includes a plug 3, a limiting piece 4 and a fixing piece 5, and the limiting piece 4 and the fixing piece 5 are hollow structures, wherein:

[0050] The plug 3 is provided with a through hole 31, and the through hole 31 is coaxial with the connecting portion 11 and is used for passing the optical fiber 10. In the specific implementation process, the aperture of the through hole 31 can be determined according to the thickness of the optical fiber 10. As a preferred scheme, when the optical fiber 10 passes through the through hole 31, the through hole 31 is in an interference state with the optical fiber. That is, the through hole 31 clamps the optical fiber 10, at this time, the through hole 31 can play a fixed role on the optical fiber 10, which can reduce the shaking of the optical fiber 10 in the through hole 31, and further reduce the shaking of the optical fiber in the optical fiber distribution box 30, thereby ensuring the connection accuracy of the optical fiber in the optical fiber distribution box 30.

[0051] The end face diameter of the end of the plug 3 close to the first annular platform 13 is the same as the outer diameter of the first annular platform 13, and the outer side wall of the end of the plug 3 away from the first annular platform 13 is provided with an annular groove 32 in the circumferential direction. The outer diameter of the first annular platform 13 refers to the diameter of the large circle of the first annular platform 13, and in the present application, the outer diameter of the first annular platform 13 can be understood as the inner diameter of the connecting portion 11. The meaning that the end face diameter of the end of the plug 3 close to the first annular platform 13 is the same as the outer diameter of the first annular platform 13 is that there can be a certain production error, and it is not required that the diameters are completely identical, but it is required that when the plug 3 and the first annular platform 13 abut, the end face of the end of the plug 3 close to the first annular platform 13 can completely cover the first annular platform 13.

[0052] The end of the limiting piece 4 away from the connecting portion 11 is provided with a plurality of limiting claws 41, and each limiting claw 41 is spaced apart by a preset distance, and the limiting claw 41 cooperates with the annular groove 32 to limit the plug 3. The preset distance between the limiting claws 41 can be the same or different.

[0053] In some embodiments, the material of the plug 3 is silica gel. In the specific implementation process, the material of the box body 1 can be a hard plastic that can adapt to an environment above 65℃, and the material of the limiting piece 4 can also be a relatively hard plastic material.

[0054] One end of the fixing member 5 is provided with a second thread (not shown in the figure) matched with the first thread 12. When the fixing member 5 is fastened with the connecting part 11 through the first thread 12 and the second thread, the fixing member 5 covers the outside of the limiting member 4, the limiting member 4 covers the plug 3 from the end of the plug 3 away from the connecting part 11, the limiting claw 41 is in interference fit with the annular groove 32, and the end face of the plug 3 close to the annular platform 13 abuts against the first annular platform 13 and is in interference state.

[0055] In the specific implementation process, when the first thread 12 of the connecting part 11 is an external thread, the second thread on the fixing member 5 is an internal thread; when the first thread 12 of the connecting part 11 is an internal thread, the second thread on the fixing member 5 is an external thread.

[0056] In the process of fastening connection of the fixing member 5 and the connecting part 11 through threads, the fixing member 5 covers the outside of the limiting member 4, the limiting member 4 covers the plug 3, along with the increase of the connection tightness between the fixing member 5 and the connecting part 11, the distance between the fixing member 5 and the connecting part 11 will be shortened constantly, in this process, the fixing member 5 will constantly apply pressure to the limiting claw 41 of the limiting member 4, so that the limiting claw 41 can be pressed in the annular groove 32 and be in interference fit with the annular groove 32 to limit the plug 3 in the circumferential direction; at the same time, the shortening of the distance between the fixing member 5 and the connecting part 11 will also promote the fixing member 5 to push the limiting member 4, the limiting member 4 to push the plug 3 to move together towards the direction of the connecting part 11, so that the limiting member 4 pushes the plug 3 into the connecting part 11 and abuts against the first annular platform 13 in the connecting part 11 and is in interference state, thereby limiting the plug 3 in the axial direction. When the fixing member 5 is fastened with the connecting part 11, at this time, the fixing member 5 presses the limiting member 4 and is in interference fit with the limiting member 4, the limiting claw 41 is in interference fit with the annular groove 32, and the plug 3 is also in interference fit with the first annular platform 13, thereby realizing the sealing of the optical fiber distribution box.

[0057] As shown in Figure 2 In some embodiments, the box body 1 is also provided with a plurality of mounting holes 14, and the inner wall of the mounting hole 14 is provided with a second annular platform 15 in the circumferential direction. Among them, the mounting hole 14 is used for mounting the optical fiber adapter matched with the box body 1, and the mounted plurality of optical fiber adapters can be the same type of optical fiber adapter or different types of optical fiber adapters. Figure 4 As shown in

[0058] Please refer to Figure 5a and Figure 5b , Figure 5aA plug structure schematic diagram provided for an embodiment of the present application, Figure 5b Another plug structure schematic diagram provided for an embodiment of the present application.

[0059] In some embodiments, the fiber distribution box can further include a plug 6, the plug 6 is detachably connected with the mounting hole 14, the diameter of the end of the plug 6 close to the mounting hole 14 is less than or equal to the hole diameter of the mounting hole 14, and the plug 6 is provided with external threads, the diameter of the end of the plug 6 away from the mounting hole 14 is the same as the outer diameter of the second annular platform 15; when the plug 6 is tightly connected with the mounting hole 14, the end of the plug 6 close to the mounting hole 14 passes through the mounting hole 14 into the inside of the box body 1 and is threadedly connected with the box body 1, and the annular end face 61 of the end of the plug 6 away from the mounting hole 14 abuts against the second annular platform 15.

[0060] As shown in Figure 6 , the plug 6 can be used to seal the fiber distribution box. Figure 6 Another scene schematic diagram of a fiber distribution box provided for an embodiment of the present application. When a fiber distribution box does not need to install a large number of fiber adapters, the connection between the plug 6 and the mounting hole 14 can be used to realize the sealing of the fiber distribution box. In the specific implementation process, the plug in Figure 5a may be used, or the plug in Figure 5b may be used. The specific plug to be used can be determined according to the actual installation and the box of the fiber distribution box.

[0061] When the plug 6 is installed on the fiber distribution box, since the diameter of the end of the plug 6 close to the mounting hole 14 is less than or equal to the hole diameter of the mounting hole 14, the end of the plug 6 close to the mounting hole 14 can directly pass through the mounting hole 14, and at this time, the end of the plug 6 close to the mounting hole 14 is at least partially located in the inside of the box body 1. In the specific implementation process, the diameter of the end of the plug 6 close to the mounting hole 14 can be preferably equal to the hole diameter of the mounting hole 14, so as to improve the sealing effect when the fiber distribution box is sealed.

[0062] After the end of the plug 6 close to the mounting hole 14 passes through the mounting hole 14, since the plug 6 is provided with external threads, a suitable nut can be sleeved on the end of the plug 6 close to the mounting hole 14, so as to fix the plug 6 on the mounting hole 14 through the threaded connection between the suitable nut and the plug 6, and when the plug 6 is tightly connected with the mounting hole 14, the annular end face 61 of the end of the plug 6 away from the mounting hole 14 abuts against the second annular platform 15. Since the diameter of the end of the plug 6 away from the mounting hole 14 is the same as the outer diameter of the second annular platform 15, the connection gap between the plug 6 and the mounting hole 14 can also be reduced, so as to improve the sealing effect when the fiber distribution box is sealed.

[0063] In addition, in the implementation process, the inner wall of the mounting hole 14 can be provided with an internal thread matched with the external thread provided on the plug 6, so as to increase the connection strength between the mounting hole 14 and the plug 6. When the plug 6 is connected with the mounting hole 14, a sealing ring and a nylon washer can be sleeved on the plug 6, and the size of the sealing ring and the nylon washer can be equivalent to the diameter of the end of the plug 6 away from the mounting hole 14. When the plug 6 is tightly connected with the mounting hole 14, the sealing ring is in abutment with the second annular platform 15 and is in an interference state, so as to strengthen the sealing effect.

[0064] Figure 7 The structure diagram of the plug provided in the embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, in some embodiments, the plug 3 comprises a plug body 35 and a connecting platform 33 with a preset height, the connecting platform 33 and the plug body 35 are integrally formed, and the diameter of the connecting platform 33 is greater than the diameter of the plug body 35. The diameter of the plug body 35 is less than or equal to the inner diameter of the limiting member 4. Figure 3 Figure 7 As shown in FIG. 1, in some embodiments, the plug 3 comprises a plug body 35 and a connecting platform 33 with a preset height, the connecting platform 33 and the plug body 35 are integrally formed, and the diameter of the connecting platform 33 is greater than the diameter of the plug body 35. The diameter of the plug body 35 is less than or equal to the inner diameter of the limiting member 4.

[0065] When the fixing member 5 is tightly connected with the connecting portion 11, the limiting member 4 is sleeved on the plug body 35, the end face of the end of the limiting member 4 close to the connecting portion 11 is in interference fit with the end face of the connecting platform 33 away from the first annular platform 13, and the end face of the connecting platform 33 close to the first annular platform 13 is in abutment with the annular platform 13 and is in an interference state.

[0066] As shown in FIG. 1, in some embodiments, the plug 3 comprises a plug body 35 and a connecting platform 33 with a preset height, the connecting platform 33 and the plug body 35 are integrally formed, and the diameter of the connecting platform 33 is greater than the diameter of the plug body 35. The diameter of the plug body 35 is less than or equal to the inner diameter of the limiting member 4. Figure 7 As shown in FIG. 1, in some embodiments, the plug 3 comprises a plug body 35 and a connecting platform 33 with a preset height, the connecting platform 33 and the plug body 35 are integrally formed, and the diameter of the connecting platform 33 is greater than the diameter of the plug body 35. The diameter of the plug body 35 is less than or equal to the inner diameter of the limiting member 4.

[0067] In addition, since the volume of the plug 3 is greater than the volume of the sealing ring, the deformation amount of the plug 3 is less than that of the sealing ring when the plug 3 is in a high external temperature, so as to reduce the influence of the high temperature environment on the sealing effect. At the same time, since the volume of the plug 3 is greater than the volume of the sealing ring, the parts are not easy to be lost or omitted during assembly, and the plug 3 can be conveniently installed.

[0068] Preferably, the diameter of the plug body 35 can be equal to the inner diameter of the limiting member 4, that is, when the limiting member 4 is sleeved on the plug body 35, the circumferential side of the plug body 35 is in contact with the inner wall of the limiting member 4, so as to increase the contact area between the plug 3 and the limiting member 4 and improve the limiting effect of the limiting member 4 on the plug 3. ​

[0069] As shown in Figure 8 FIG. 1, Figure 8 FIG. 1 is a structural schematic diagram of a limiting piece provided in an embodiment of the present application. In some embodiments, a limiting lug 41 is provided with a limiting protrusion 42 at one end away from the connecting part 11, and the limiting protrusion 42 is adapted to the annular groove 32. When the fixing piece 5 is tightly connected with the connecting part 11, the limiting piece 4 is sleeved on the plug 3, the limiting protrusion 42 is located in the annular groove 32 and is in interference fit with the annular groove 32.

[0070] In the specific implementation process, one limiting protrusion 42 can be provided at one end of each limiting lug 41, the position of the limiting protrusion 42 can be determined according to the position of the annular groove 32 on the plug 3, and the size of the limiting protrusion 42 can be determined according to the depth of the annular groove 32 on the plug 3, as long as the limiting protrusion 42 can be located in the annular groove 32 after the limiting piece 4 is completely sleeved on the plug 3, and the limiting protrusion 42 can be in interference fit with the annular groove 32 after the fixing piece 5 is tightly connected with the connecting part 11.

[0071] In some embodiments, the width of the annular groove 32 decreases from the slot opening of the annular groove 32 to the bottom surface of the annular groove 32. In the specific implementation process, the shape of the annular groove 32 is trapezoidal from the axial section of the plug 3, the width of the slot opening of the annular groove 32 is larger, which can facilitate the limiting lug 41 or the limiting protrusion 42 to enter the annular groove 32, and the width of the bottom surface of the annular groove 32 is smaller, which can limit the position of the limiting lug 41 or the limiting protrusion 42, limit the matching position of the limiting lug 41 or the limiting protrusion 42 and the annular groove 32, and improve the limiting effect on the plug 3.

[0072] As shown in Figure 9 FIG. 1, Figure 9 FIG. 1 is a structural schematic diagram of a fixing piece provided in an embodiment of the present application. In an embodiment, the fixing piece 5 is provided with an abutting part 51, the abutting part 51 abuts against one end of the plug 3 and / or the limiting piece 4 to limit the plug 3 and / or the limiting piece 4.

[0073] In the specific implementation process, the fixing piece 5 is provided with the abutting part 51, when the fixing piece 5 is tightly connected with the connecting part 11, one end of the plug 3 and / or the limiting piece 4 away from the connecting part 11 can abut against the abutting part 51, so that the plug 3 and / or the limiting piece 4 are fixed and limited in the fixing piece 5, and the axial movement of the plug 3 and / or the limiting piece 4 is further limited.

[0074] In an embodiment, the inner diameter of the fixing member 5 decreases from the end of the fixing member 5 close to the connecting portion 11 to the abutting portion 51. In a specific implementation, the inner diameter of the fixing member 5 decreases from the end of the fixing member 5 close to the connecting portion 11 to the abutting portion 51, which makes the fixing member 5 continuously apply pressure to the limiting pawl 41 of the limiting member 4 as the distance between the fixing member 5 and the connecting portion 11 continuously decreases during the threaded fastening connection of the fixing member 5 and the connecting portion 11. Since the inner diameter of the fixing member 5 gradually decreases, the shorter the distance between the fixing member 5 and the connecting portion 11, the greater the pressure applied to the limiting pawl 41 of the limiting member 4, thereby improving the fitting tightness between the limiting pawl 41 and the annular groove 32, making the limiting pawl 41 be tightly pressed in the annular groove 32 and be in interference fit with the annular groove 32, thereby better fixing the plug 3 and limiting the plug 3 in the circumferential and axial directions.

[0075] The optical fiber distribution box provided in the embodiment includes a box body and a fastening assembly, the fastening assembly is detachably connected with the connecting portion; the connecting portion is fixedly arranged on the box body and is provided with a first thread in the circumferential direction, and the inner wall of the connecting portion is provided with a first annular platform in the circumferential direction; the fastening assembly includes a plug, a limiting member and a fixing member, the end face of the end of the plug close to the first annular platform has the same diameter as the outer diameter of the first annular platform, and the outer side wall of the end of the plug away from the first annular platform is provided with an annular groove in the circumferential direction; the end of the limiting member away from the connecting portion is provided with a plurality of limiting pawls, and each limiting pawl is spaced apart from each other by a preset distance; and the end of the fixing member is provided with a second thread matched with the first thread. During the fastening connection of the fixing member and the connecting portion, the fixing member is sleeved outside the limiting member, and the limiting member is sleeved on the plug. As the connection tightness between the fixing member and the connecting portion increases, the fixing member continuously applies pressure to the limiting pawl of the limiting member, thereby making the limiting pawl be tightly pressed in the annular groove and be in interference fit with the annular groove, limiting the plug in the circumferential direction. Meanwhile, the fixing member also pushes the limiting member to move in the direction of the connecting portion, thereby making the limiting member push the plug into the connecting portion and abut against and be in interference fit with the first annular platform in the connecting portion, limiting the plug in the axial direction. When the fixing member and the connecting portion are fastened and connected, the limiting pawl is in interference fit with the annular groove, and the plug is also in interference fit with the first annular platform, thereby realizing the sealing of the optical fiber distribution box and guaranteeing the connection accuracy of the optical fiber connection.

[0076] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed in the present application, and these modifications or replacements shall be encompassed in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An optical fiber distribution box, characterized by, It comprises a box body (1) and a fastening assembly (2) which is detachably connected with a connecting part (11); The connecting part (11) is provided on the box body (1) and is provided with a first thread (12) in the circumferential direction, and the inner wall of the connecting part (11) is provided with a first annular platform (13) in the circumferential direction. The connecting part (11) is a hollow structure and communicates with the inside of the box body (1) to allow the optical fiber to pass in or out of the optical fiber distribution box through the connecting part (11). The fastening assembly (2) comprises a plug (3), a limiting piece (4) and a fixing piece (5), wherein the limiting piece (4) and the fixing piece (5) are hollow structures. The plug (3) is provided with a through hole (31) for the optical fiber to pass through and is coaxial with the connecting part (11). The end face diameter of the end of the plug (3) close to the first annular platform (13) is the same as the outer diameter of the first annular platform (13). The outer side wall of the end of the plug (3) away from the first annular platform (13) is provided with an annular groove (32) in the circumferential direction. The end of the limiting piece (4) away from the connecting part (11) is provided with a plurality of limiting claws (41) which are spaced apart by a predetermined distance. The limiting claws (41) cooperate with the annular groove (32) to limit the plug (3). One end of the fixing piece (5) is provided with a second thread which cooperates with the first thread (12). When the fixing piece (5) is fastened and connected with the connecting part (11) through the first thread (12) and the second thread, the fixing piece (5) is sleeved on the outside of the limiting piece (4). The limiting piece (4) is sleeved on the plug (3) from the end of the plug (3) away from the connecting part (11). The limiting claws (41) are interference fit with the annular groove (32). The end face of the end of the plug (3) close to the first annular platform (13) abuts against the first annular platform (13) and is in interference state.

2. The fiber distribution box of claim 1, wherein, A plurality of mounting holes (14) are further provided on the box body (1). The inner wall of the mounting hole (14) is provided with a second annular platform (15) in the circumferential direction.

3. The fiber distribution box of claim 2, wherein, It further comprises: A plug (6) which is detachably connected with the mounting hole (14). The diameter of the end of the plug (6) close to the mounting hole (14) is less than or equal to the hole diameter of the mounting hole (14) and is provided with an external thread. The diameter of the end of the plug (6) away from the mounting hole (14) is the same as the outer diameter of the second annular platform (15). When the plug (6) is fastened and connected with the mounting hole (14), the end of the plug (6) close to the mounting hole (14) passes through the mounting hole (14) into the inside of the box body (1) and is threadedly connected with the box body (1). The annular end face (61) of the end of the plug (6) away from the mounting hole (14) abuts against the second annular platform (15).

4. The fiber distribution box of claim 1, wherein, The plug (3) comprises a plug body (35) and a connecting platform (33) with a preset height, the connecting platform (33) and the plug body (35) are integrally formed, and the diameter of the connecting platform (33) is greater than the diameter of the plug body (35), and the diameter of the plug body (35) is less than or equal to the inner diameter of the limiting piece (4); When the fixing piece (5) is tightly connected with the connecting part (11), the limiting piece (4) is sleeved on the plug body (35), the end face of the end of the limiting piece (4) close to the connecting part (11) is in interference fit with the end face of the end of the connecting platform (33) away from the first annular platform (13), and the end face of the end of the connecting platform (33) close to the first annular platform (13) is in abutment with the first annular platform (13) and is in interference state.

5. The fiber distribution box of claim 1, wherein, The limiting piece (4) is sleeved on the plug (3), the limiting protrusion (42) is located in the annular groove (32) and is in interference fit with the annular groove (32). The width of the annular groove (32) decreases from the slot opening of the annular groove (32) to the bottom surface of the annular groove (32).

6. The fiber distribution box of claim 1, wherein, The fixing piece (5) is provided with an abutting part (51), the abutting part (51) is in abutment with one end of the plug (3) and / or the limiting piece (4), so as to limit the plug (3) and / or the limiting piece (4).

7. The fiber distribution box of claim 1, wherein, The inner diameter of the fixing piece (5) decreases from the end of the fixing piece (5) close to the connecting part (11) to the abutting part (51).

8. The fiber distribution box of claim 1, wherein, The connecting part (11), the first annular platform (13) and the box body (1) are integrally formed.

9. The fiber distribution box of claim 1, wherein, The optical fiber, the optical fiber adapter and the optical fiber distribution box according to any one of claims 1-9, wherein:

10. An optical fiber connection system, characterized by, The optical fiber enters or exits the optical fiber distribution box through the connecting part (11) of the optical fiber distribution box and is fixedly connected with the optical fiber distribution box; The optical fiber adapter is detachably connected with the optical fiber distribution box through the mounting hole (14) of the optical fiber distribution box. ​

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