Positioning jig for fiber loopers

Abstract

The present application relates to the technical fields of fiber loop ware processing, and especially relates to a positioning jig of a fiber loop ware. The positioning jig of the fiber loop ware comprises a positioning assembly and a clamping assembly. A positioning groove is formed on the positioning assembly. The positioning groove comprises a curved groove which is used for accommodating and positioning a loop bending part of a fiber loop part. The clamping assembly is installed on the positioning assembly and can move relative to the positioning assembly. The clamping assembly is used for clamping and fixing a fiber connecting part. The positioning jig limits the bending radius of the fiber loop part through the curved groove on the positioning assembly, so as to realize the accurate control of the bending radius of the loop bending part. The processing length of the fiber connecting part is adjusted through the clamping assembly. The fiber connecting part with different lengths can be reserved for fiber joints with different specifications, and the processing adaptability is strong. Fiber connecting parts with the same length can be provided for fiber joints with the same specification. In addition, the positioning jig of the fiber loop ware has simple structure and is convenient to operate, and has high working efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fiber loop device processing, in particular to a positioning jig of a fiber loop device. BACKGROUND

[0002] As a medium for sending back fiber signals, the fiber loop device is used for signal backhaul in a test system or a network system. By using the backhaul signal, various potential abnormalities in the network link can be detected to ensure the normal operation of the network link.

[0003] In the prior art, since the product size of the fiber loop device is small, a certain length of fiber connection part needs to be reserved for installing the fiber joint during the production of the fiber loop device. Different types of fiber joints require different lengths of fiber connection part to be reserved, but the length of the fiber connection part in the fiber loop device is difficult to control, and the length of the fiber connection part in the same specification fiber loop device often does not meet the installation requirements of the fiber joint, and the length of the fiber connection part in the same specification fiber loop device is prone to inconsistent problems. In addition, the excessive bending radius of the fiber loop part in the fiber loop device will cause waste of the fiber, and the bending radius of the fiber loop part is too small, which will damage the internal structure of the fiber loop part and affect the service life of the fiber loop device.

[0004] Therefore, there is an urgent need for a positioning jig of a fiber loop device to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a positioning jig of a fiber loop device to accurately control the bending radius of the loop bending part in the fiber loop part, ensure the service life of the fiber loop device, and also accurately adjust the length of the fiber connection part, improve the applicability, and the structure is simple, easy to operate and high in working efficiency.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The positioning jig of the fiber loop device, the fiber in the fiber loop device includes a fiber loop part and a fiber connection part, both ends of the fiber loop part are connected with the fiber connection part, the fiber loop part includes a loop bending part, a loop straight part and a loop transition part, both ends of the loop bending part are connected with the loop straight part, and the ends of the loop straight part are connected with the loop transition part, comprising:

[0008] A positioning assembly is provided with a positioning slot, the positioning slot includes a bending slot, and the bending slot is used for accommodating and positioning the loop bending part of the fiber loop part; and

[0009] A clamping assembly is installed on the positioning assembly and can move relative to the positioning assembly, and the clamping assembly is used for clamping and fixing the fiber connection part.

[0010] As a preferred solution, the positioning groove further comprises:

[0011] a straight groove, the two ends of the curved groove being communicated with the straight groove, the straight groove being used for accommodating the loop straight part of the fiber loop part and fiber accessories;

[0012] a clamping groove, the end of each straight groove being communicated with the clamping groove, the clamping groove being used for clamping the loop transition part of the fiber loop part.

[0013] As a preferred solution, the curved groove comprises:

[0014] a curved groove body, the loop curved part being in clearance fit with the curved groove body; and

[0015] a curved limiting groove, the two ends of the curved groove body being communicated with the curved limiting groove, and the curved limiting groove being communicated with the corresponding straight groove, the loop curved part being in interference fit with the curved limiting groove.

[0016] As a preferred solution, the straight groove is in clearance fit with the loop straight part, so that the straight groove can additionally accommodate fiber accessories.

[0017] As a preferred solution, the clamping groove is in interference fit with the loop transition part.

[0018] As a preferred solution, the clamping assembly comprises:

[0019] a clamping body, used for fixing the fiber connection part; and

[0020] a distance adjusting member, installed between the clamping body and the positioning assembly, the distance adjusting member being configured to adjust the distance between the clamping body and the positioning assembly.

[0021] As a preferred solution, the distance adjusting member is a distance adjusting rod, one end of the distance adjusting rod being fixed with the clamping body, and the other end being movably connected with the positioning assembly and being movable relative to the positioning assembly.

[0022] As a preferred solution, a guide hole is formed in the positioning assembly; the distance adjusting rod is movable along the guide hole relative to the positioning assembly.

[0023] As a preferred solution, a fixing through hole is further formed in the positioning assembly, the fixing through hole being communicated with the guide hole;

[0024] the positioning jig of the fiber loop device further comprises a locking assembly, the locking assembly being movable along the fixing through hole and abutting against the distance adjusting rod.

[0025] As a preferred solution, the locking assembly is a threaded rod which is connected with the fixing through hole through threads.

[0026] Advantages of the present application:

[0027] The positioning jig of the optical fiber loop device provided by the present application solves the problems of waste of optical fiber due to too large bending radius of the loop bending part of the optical fiber loop part and influence on service life of the optical fiber loop device due to too small bending radius of the loop bending part by arranging a positioning assembly and a positioning groove on the positioning assembly, and the bending groove in the positioning groove is used to accommodate and position the loop bending part of the optical fiber loop part, so that the bending radius of the loop bending part is accurately controlled and the service life of the optical fiber loop device is ensured. In addition, the clamping assembly is mounted on the positioning assembly and can move relative to the positioning assembly, and the clamping assembly is used to clamp and fix the optical fiber connecting part, so that the processing length of the optical fiber connecting part is adjusted. Different lengths of the optical fiber connecting part can be reserved for optical fiber joints of different specifications, the processing adaptability is strong, the same length of the optical fiber connecting part can be provided for the optical fiber loop devices of the same specification, and the consistency of the optical fiber connecting part is ensured. In addition, the positioning jig of the optical fiber loop device has simple structure and is convenient to operate, and has high work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the positioning jig of the optical fiber loop device provided by the embodiment of the present application;

[0029] Figure 2 is a sectional view of the positioning assembly.

[0030] In the figure:

[0031] 1000, positioning jig of the optical fiber loop device;

[0032] 100, positioning assembly; 110, positioning groove; 111, bending groove; 1111, main body of the bending groove; 1112, bending limiting groove; 112, straight groove; 113, clamping groove; 120, fixing through hole; 130, guide hole;

[0033] 200, clamping assembly; 210, clamping main body; 211, mounting hole; 212, clamping groove; 220, distance adjusting piece;

[0034] 2000, optical fiber;

[0035] 2100, optical fiber loop part; 2110, loop bending part; 2120, loop straight part; 2130, loop transition part; 2200, optical fiber connecting part

[0036] 3000, optical fiber joint. DETAILED DESCRIPTION

[0037] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present application will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless explicitly defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] In the description of the present embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] As a medium for returning optical fiber signals, the optical fiber circuit device is used for signal return in test systems or network systems. In the prior art, due to the small size of the optical fiber circuit device, a certain length of optical fiber connecting part needs to be reserved for installing the optical fiber joint during the production of the optical fiber circuit device. Different types of optical fiber joints require different lengths of optical fiber connecting part to be reserved, but the length of the optical fiber connecting part in the optical fiber circuit device is difficult to control, and the length of the reserved optical fiber connecting part often does not meet the installation requirements of the optical fiber joint, and the length of the optical fiber connecting part in the same specification optical fiber circuit device is prone to inconsistent problems. Moreover, the excessive bending radius of the optical fiber circuit part in the optical fiber circuit device will cause waste of optical fiber, and the excessive bending radius of the optical fiber circuit part will damage the internal structure of the optical fiber circuit part and affect the service life of the optical fiber circuit device.

[0042] To solve the above problems, such as Figure 1 As shown, this embodiment provides a positioning fixture 1000 for an optical fiber return device. The positioning fixture 1000 includes a positioning component 100 and a clamping component 200. The positioning component 100 has a positioning groove 110, which includes a bending groove 111. The bending groove 111 is used to accommodate and position the loop bend 2110 of the optical fiber return section 2100. The clamping component 200 is mounted on the positioning component 100 and is movable relative to the positioning component 100. The clamping component 200 is used to clamp and fix the optical fiber connector 2200. This positioning fixture 1000 limits the bending radius of the loop bend 2110 by using the bending groove 111 in the positioning groove 110 of the positioning component 100. This solves the problems of excessively large bending radii wasting optical fiber 2000 and excessively small bending radii affecting the service life of the optical fiber return device, thereby precisely controlling the bending radius of the loop bend 2110 and ensuring the service life of the optical fiber return device. Furthermore, by adjusting the processing length of the fiber optic connector 2200 through the clamping assembly 200, not only can different lengths of fiber optic connector 2200 be reserved for fiber optic connectors 3000 of different specifications, improving processing adaptability, but also fiber optic connector 2200 of the same length and size can be provided for fiber optic loopers of the same specifications. In addition, the positioning fixture 1000 of this fiber optic looper has a simple structure, is easy to operate, and has high work efficiency. It should be noted that, in this embodiment, the optical fiber 2000 in the optical fiber return device includes an optical fiber return section 2100 and an optical fiber connector section 2200. Both ends of the optical fiber return section 2100 are connected to the optical fiber connector section 2200. The optical fiber return section 2100 is configured to transmit and return optical fiber signals. The optical fiber return section 2100 includes a loop bend section 2110, a loop straight section 2120, and a loop transition section 2130. Both ends of the loop bend section 2110 are connected to the loop straight section 2120, and the end of each loop straight section 2120 is connected to the loop transition section 2130. The end of each loop transition section 2130 is connected to the optical fiber connector section 2200. The optical fiber connector section 2200 is configured to connect to the optical fiber connector 3000. The structure and principle of the optical fiber return device are existing technologies and will not be described in detail here.

[0043] Preferably, such as Figure 1 and Figure 2As shown, the positioning groove 110 further comprises straight grooves 112 and clamping grooves 113, both ends of the curved groove 111 are communicated with the straight grooves 112, the straight grooves 112 are used to accommodate the loop straight part 2120 of the optical fiber loop part 2100 and the optical fiber accessories, the end of each straight groove 112 is communicated with the clamping groove 113, and the clamping groove 113 is used to clamp and fix the loop transition part 2130 of the optical fiber loop part 2100. The positioning groove 110 accommodates the loop straight part 2120 and the optical fiber accessories through the straight grooves 112, realizes the accommodation of the optical fiber loop part 2100 and the additionally configured optical fiber accessories, and clamps and fixes the loop transition part 2130 through the clamping groove 113, thereby realizing the fixation of the optical fiber loop part 2100, and the structure is simple and convenient to operate.

[0044] Further, the curved groove 111 comprises a curved groove body 1111 and a curved limiting groove 1112, the loop curved part 2110 is in clearance fit with the curved groove body 1111, both ends of the curved groove body 1111 are communicated with the curved limiting grooves 1112, the curved limiting grooves 1112 are communicated with the corresponding straight grooves 112, and the loop curved part 2110 is in interference fit with the curved limiting grooves 1112. The curved groove 111 is in clearance fit with the loop curved part 2110 through the curved groove body 1111, thereby realizing the effect of convenient bending accommodation of the loop curved part 2110, and a certain fault tolerance space is left during the accommodation of the loop curved part 2110, thereby improving the work efficiency, and the loop curved part 2110 is accommodated and positioned through the curved limiting groove 1112. When the loop curved part 2110 needs to be accommodated in the curved groove 111, the loop curved part 2110 is first accommodated in the curved groove body 1111 according to the bending shape of the curved groove body 1111, and then the loop curved part 2110 is accommodated in the curved limiting groove 1112, thereby accommodating and fixing the loop curved part 2110 in the curved groove 111.

[0045] Preferably, the straight grooves 112 are in clearance fit with the loop straight part 2120, so that the straight grooves 112 can additionally accommodate the optical fiber accessories on the basis of accommodating the loop straight part 2120. After the bending accommodation of the loop curved part 2110 is completed, the loop straight part 2120 is accommodated in the straight grooves 112 along the shape of the straight grooves 112, and the additional optical fiber accessories are accommodated in the straight grooves 112, thereby avoiding the loss of the optical fiber accessories. It should be noted that, in the embodiment, the straight grooves 112 are rectangular grooves, and the straight grooves 112 are arranged as rectangular grooves in order to further facilitate the accommodation of the optical fiber accessories. In other embodiments, the shape of the straight grooves 112 can also be circular or triangular, as long as the optical fiber accessories can be accommodated, and the present embodiment is not limited in this regard.

[0046] Furthermore, the snap-fit ​​slot 113 and the loop transition portion 2130 are interference-fitted. The snap-fit ​​slot 113 and the loop transition portion 2130 are fixed together by the snap-fit ​​slot 113. After the loop straight portion 2120 and the optical fiber components are accommodated, the loop transition portion 2130 and the snap-fit ​​slot 113 are snap-fitted together to fix the optical fiber loop portion 2100 and the positioning slot 110.

[0047] To facilitate adjustment of the length of the fiber optic connector 2200, such as Figure 1 As shown, the clamping assembly 200 includes a clamping body 210 and a distance adjustment member 220. The clamping body 210 is used to fix the optical fiber connector 2200, and the distance adjustment member 220 is installed between the clamping body 210 and the positioning assembly 100. The distance adjustment member 220 is configured to adjust the distance between the clamping body 210 and the positioning assembly 100. By clamping the optical fiber connector 2200 with the clamping body 210 and adjusting the distance between the clamping body 210 and the positioning assembly 100 with the distance adjustment member 220, the distance between the clamping body 210 and the positioning assembly 100 is adjustable, thereby achieving the effect of adjustable length of the optical fiber connector 2200 of the optical fiber 2000 housed on the positioning assembly 100.

[0048] It should be noted that, in this embodiment, the clamping body 210 is provided with a clamping groove 212, which is interference-fitted with the optical fiber connector 2200. The clamping groove 212 is used to clamp and fix the optical fiber connector 2200. Since the ends of the two loop transition portions 2130 are each connected to a section of optical fiber connector 2200, two clamping grooves 212 are correspondingly provided on the clamping body 210.

[0049] Furthermore, the distance adjustment component 220 is a distance adjustment rod. One end of the distance adjustment rod is fixed to the clamping body 210, and the other end is movably connected to the positioning component 100 and can move relative to the positioning component 100. By fixing one end of the distance adjustment rod to the clamping body 210 and movably connecting the other end to the positioning component 100 and allowing it to move relative to the positioning component 100, the clamping body 210 can be moved relative to the positioning component 100. When it is necessary to adjust the length of the fiber optic connector 2200, the fiber optic connector 2200 is first removed from the clamping slot 212 on the clamping body 210. The distance adjustment rod is then adjusted so that it moves the clamping body 210 away from or towards the positioning component 100. After the clamping body 210 is adjusted to the preset position relative to the positioning component 100, the fiber optic connector 2200 is re-clamped into the clamping slot 212 on the clamping body 210, thus achieving the effect of adjusting the length of the fiber optic connector 2200 clamped on the clamping body 210.

[0050] Preferably, in the embodiment, the number of distance adjusting rods is two, and the two distance adjusting rods are respectively installed at two ends of the clamping body 210 and the positioning assembly 100, facilitating the distance adjusting operation of the staff, and in other embodiments, the specific number of distance adjusting rods can be set to any number according to actual needs, and the embodiment is not limited specifically.

[0051] It should be noted that in the embodiment, two mounting holes 211 are formed on the clamping body 210, and each mounting hole 211 is threadedly connected with one end of a distance adjusting rod, thereby achieving the fixed effect of the distance adjusting rod and the clamping body 210. The fixed connection of the distance adjusting rod and the clamping body 210 through the threaded connection not only can realize the detachable connection of the distance adjusting rod and the clamping body 210, but also can ensure the connection stability of the distance adjusting rod and the clamping body 210. In other embodiments, the distance adjusting rod and the clamping body 210 can also be connected and fixed by adhesion or welding, and the embodiment is not limited specifically.

[0052] Preferably, as shown in Figure 1 and Figure 2 , the positioning assembly 100 is provided with a guide hole 130, the guide hole 130 extends along the direction of movement of the distance adjusting rod relative to the positioning assembly 100, and the distance adjusting rod can move relative to the positioning assembly 100 along the guide hole 130. By forming the guide hole 130 on the positioning assembly 100, a guiding effect is provided for the movement of the distance adjusting rod relative to the positioning assembly 100. It should be noted that in the embodiment, two guide holes 130 are formed on the positioning assembly 100 to match the distance adjusting rod, and in other embodiments, the number of guide holes 130 only needs to match the number of distance adjusting rods, and the embodiment does not limit the specific number of guide holes 130.

[0053] In order to realize the fixing of the distance adjusting rod and the positioning assembly 100, a fixing through hole 120 is further formed on the positioning assembly 100, and the fixing through hole 120 is in communication with the guide hole 130. The positioning jig 1000 of the optical fiber circuit device further comprises a locking assembly (not shown in the figure), which can extend into the fixing through hole 120 and abut against the distance adjusting rod. By extending the locking assembly into the fixing through hole 120 and abutting against the distance adjusting rod, the fixing effect of the distance adjusting rod and the positioning assembly 100 is realized. After the distance adjusting rod drives the clamped main body 210 to move to the preset position relative to the positioning assembly 100, the locking assembly is extended into the fixing through hole and abuts against the distance adjusting rod, thereby realizing the fixing of the distance adjusting rod and the positioning assembly 100. It should be noted that in the embodiment, the fixing through hole 120 penetrates the two guide holes 130, and the two locking assemblies extend into the two ends of the fixing through hole 120 and abut against the distance adjusting rod. In other embodiments, fixing through holes 120 can also be formed on the two side walls of the positioning assembly 100, and the two fixing through holes 120 are in communication with the corresponding guide holes 130, and the two locking assemblies extend into the corresponding fixing through holes 120 and abut against the distance adjusting rod. The present embodiment is not limited in this regard. By forming fixing through holes 120 on the two side walls of the positioning assembly 100, damage to the positioning assembly 100 caused by the fixing through hole 120 penetrating the two guide holes 130 can be avoided, further improving the structural strength of the positioning assembly 100.

[0054] Further, the locking assembly is a threaded rod, which is threadedly connected with the fixing through hole 120. The threaded connection can ensure the stability of the threaded rod when it abuts against the distance adjusting rod, thereby solving the problem of loosening when the threaded rod abuts against the distance adjusting rod. It should be noted that in other embodiments, the locking assembly and the fixing through hole 120 are also applicable through interference fit connection, and the present embodiment is not limited in this regard.

[0055] In order to facilitate understanding of the positioning jig 1000 of the optical fiber circuit device disclosed in the present embodiment, the specific process of the positioning jig 1000 of the optical fiber circuit device in clamping and positioning the various parts of the optical fiber 2000 in the optical fiber circuit device will be described below. Figure 1 The specific process of the positioning jig 1000 of the optical fiber circuit device in clamping and positioning the various parts of the optical fiber 2000 in the optical fiber circuit device will be described below.

[0056] 1) The circuit bending part 2110 is bent and accommodated in the bending groove main body 1111;

[0057] 2) The circuit bending part 2110 is clamped and fixed with the bending limiting groove 1112;

[0058] 3) The circuit straight part 2120 and the optical fiber scattered parts are accommodated in the straight groove 112;

[0059] 4) The circuit transition part 2130 is clamped and fixed with the clamping groove 113;

[0060] 5) Adjust the distance adjusting rod, make the clamping body 210 move to the preset position relative to the positioning assembly 100, then screw the threaded rod into the fixed hole 120 along the thread and abut against the distance adjusting rod, and finally clamp and fix the optical fiber connecting part 2200 in the clamping groove 212;

[0061] 6) When it is necessary to readjust the length of the optical fiber connecting part 2200, first, disassemble the optical fiber connecting part 2200 from the clamping groove 212, then unscrew the threaded rod from the fixed hole 120 along the thread, make the threaded rod loose from the distance adjusting rod, adjust the distance of the clamping body 210 relative to the positioning assembly 100, when the clamping body 210 moves to another preset position again, screw the threaded rod into the fixed hole 120 again along the thread and abut against the distance adjusting rod, and clamp the optical fiber connecting part 2200 in the clamping groove 212 again.

[0062] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. It is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A positioning jig for a fiber routing device, wherein an optical fiber (2000) in the fiber routing device comprises a fiber routing portion (2100) and a fiber connecting portion (2200), both ends of the fiber routing portion (2100) are connected with the fiber connecting portion (2200), the fiber routing portion (2100) comprises a routing bending portion (2110), a routing straight portion (2120) and a routing transition portion (2130), both ends of the routing bending portion (2110) are connected with the routing straight portion (2120), and both ends of the routing straight portion (2120) are connected with the routing transition portion (2130), characterized in that, The application relates to a positioning assembly (100) and a clamping assembly (200) for an optical fiber connection device. The positioning assembly (100) is provided with a positioning groove (110), and the positioning groove (110) comprises a curved groove (111) for accommodating and positioning a loop curved part (2110) of an optical fiber loop part (2100). The clamping assembly (200) is installed on the positioning assembly (100) and can move relative to the positioning assembly (100), and the clamping assembly (200) is used for clamping and fixing an optical fiber connecting part (2200). The positioning groove (110) further comprises: a straight groove (112) communicated with both ends of the curved groove (111), the straight groove (112) is used for accommodating a loop straight part (2120) of the optical fiber loop part (2100) and optical fiber accessories; and a clamping groove (113) communicated with the end of each straight groove (112), the clamping groove (113) is used for clamping a loop transition part (2130) of the optical fiber loop part (2100). The curved groove (111) comprises: a curved groove body (1111) in clearance fit with the loop curved part (2110); and a curved limiting groove (1112) communicated with both ends of the curved groove body (1111) and communicated with the corresponding straight groove (112), the loop curved part (2110) is in interference fit with the curved limiting groove (1112). The clamping assembly (200) comprises: a clamping body (210) for fixing the optical fiber connecting part (2200); and a distance adjusting piece (220) installed between the clamping body (210) and the positioning assembly (100), the distance adjusting piece (220) is configured to adjust the distance between the clamping body (210) and the positioning assembly (100).

2. The positioning jig for a fiber circuit according to claim 1, wherein The straight groove (112) is in clearance fit with the loop straight part (2120), so that the straight groove (112) can additionally accommodate the optical fiber accessories.

3. The positioning jig for a fiber optic circuit according to claim 1, wherein The clamping groove (113) is in interference fit with the loop transition part (2130).

4. The positioning jig for a fiber circuit according to claim 1, wherein The distance adjusting piece (220) is a distance adjusting rod, one end of the distance adjusting rod is fixed with the clamping body (210), and the other end is movably connected with the positioning assembly (100) and can move relative to the positioning assembly (100).

5. The positioning jig for a fiber optic circuit according to claim 4, wherein The positioning assembly (100) is provided with a guide hole (130) extending along the moving direction of the distance adjusting rod relative to the positioning assembly (100), and the distance adjusting rod can move along the guide hole (130) relative to the positioning assembly (100).

6. The positioning jig for a fiber optic circuit according to claim 5, wherein The positioning assembly (100) is further provided with a fixing through hole (120) communicated with the guide hole (130). The positioning jig of the fiber loop device further comprises a locking assembly capable of extending into the fixed through hole (120) and abutting against the distance adjusting rod.

7. The positioning jig for a fiber optic circuit according to claim 6, wherein The locking assembly is a threaded rod which is connected with the fixed through hole (120) through threads.

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