Positioning tooling for fixing end face structure of optical-fiber connector box

Abstract

A positioning tooling for fixing an end face structure of an optical-fiber connector box, the positioning tooling being used for limiting a circumferential flange (D) of an end face structure of an optical-fiber connector box and comprising a fixed clamp (1), wherein a movable clamp (3) is connected to the fixed clamp (1); a locking assembly is arranged between the fixed clamp (1) and the movable clamp (3); the fixed clamp (1) is provided with a first groove (4); the movable clamp (3) is provided with a second groove (5); by fitting the first groove (4) with the second groove (5), a ring groove can be formed; the groove width of the ring groove is greater than the thickness of the circumferential flange (D); and each of the first groove (4) and the second groove (5) is provided with feature bosses (6), which are circumferentially spaced apart and configured to snap-fit with the circumferential flange (D). By additionally providing a support point for the optical-fiber connector box, the end face structure of the optical-fiber connector box is fixed, and at least two support points, which are axially spaced apart, are also provided for the whole optical-fiber connector box, thereby effectively improving the usage stability of the optical-fiber connector box and prolonging the service life thereof.

Description

A positioning tool for fixing the end face structure of an optical fiber splice box Technical Field

[0001] The present invention relates to the technical field of optical modules, and in particular to a positioning tool for fixing the end face structure of an optical fiber splice box. Background Art

[0002] The primary function of a fiber optic splice closure is to split optical cables into individual fibers. Fiber optic splice closures are typically installed on walls, cables, utility poles, or sewers. They provide fiber-to-fiber splicing, fiber-to-pigtail splicing, and optical connector connections.

[0003] The optical fiber splice box mainly includes a box cap structure C, a height-adjustable optical fiber tray structure B, and an end face structure A. As shown in FIG1 , the optical fiber splice box is mainly suitable for straight-through and branch connections of various optical cables installed in aerial, pipeline, and direct burial modes. The optical fiber splice box is generally fixed by adding a first assembly component to the box cap structure C to support and fix the entire optical fiber splice box. Although this structure can realize the assembly of the optical fiber splice box to a wall, cable, utility pole, or sewer, the end face structure A of the optical fiber splice box is in a suspended state. With global warming and increasingly frequent extreme weather, in severe weather such as extreme storms, heavy rain, and hail, the optical fiber splice box with only a fixed box cap structure may cause the end face structure A to shake, resulting in poor contact of the internal optical fibers, thereby causing the optical fiber splice box to fail. Therefore, the structural design of the single-point support and fixation of the optical fiber splice box in the existing technology cannot effectively ensure the effective support and fixation of the suspended end face structure A, and cannot adapt to stable use in severe weather such as extreme storms, heavy rain, and hail.

[0004] In view of the above defects, it is urgent to design a positioning tooling that is suitable for various extreme weather conditions and ensures its normal operation.

[0005] Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a positioning tool for fixing the end face structure of the optical fiber splice box in response to the defects in the prior art. The positioning tool is not only simple in structure and easy to use, but also by adding an additional support point to the optical fiber splice box, it not only fixes the end face structure of the optical fiber splice box, but also provides the entire optical fiber splice box with at least two axially spaced support points, thereby effectively improving the stability and life of the optical fiber splice box.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] The present invention provides a positioning tool for fixing the end face structure of an optical fiber splice box, which is used to limit the circumferential flange of the end face structure of the optical fiber splice box, including a fixed clamp, a movable clamp connected to the fixed clamp through a first hinge shaft, and a locking assembly for connecting the two is provided between the fixed clamp and the movable clamp, the fixed clamp is provided with a first groove arranged along its circumference, and the movable clamp is provided with a second groove arranged along its circumference, the first groove and the second groove cooperate to form an annular groove, the groove width of the annular groove is greater than the thickness of the circumferential flange, and the first groove and the second groove are both provided with characteristic bosses arranged at intervals along their circumference for clamping with the circumferential flange.

[0009] In a preferred embodiment of the present invention, the characteristic boss includes at least two first boss portions symmetrically arranged at intervals, the cross-sectional shape of the first boss portion is a right-angled trapezoid, the inclined surfaces of the two first boss portions are arranged opposite to each other along the axial direction of the circumferential flange, the spacing between the inclined surfaces of the two first boss portions gradually decreases from the inside to the outside along the radial direction of the circumferential flange, and the minimum spacing between the inclined surfaces of the two first boss portions is not greater than the thickness of the circumferential flange.

[0010] In a preferred embodiment of the present invention, the characteristic boss further includes a second boss portion arranged at the bottom of the first groove or the second groove, the cross-sectional shape of the second boss portion is rectangular, and two first boss portions are vertically spaced apart on the second boss portion.

[0011] In a preferred embodiment of the present invention, an airbag is provided in the characteristic boss, and the airbag includes at least one inflation port. After the airbag is inflated, the airbag becomes an annular airbag with a square cross-section, and a groove for cooperating and positioning the second boss portion is provided on the outer peripheral surface of the annular airbag.

[0012] In a preferred embodiment of the present invention, the locking assembly includes a fastening locking pliers connected to the end of the movable clamp via a second hinge shaft, a U-shaped lock is connected to the fastening locking pliers via a third hinge shaft, and a fixing boss with a hole is also provided on the fastening locking pliers.

[0013] In a preferred embodiment of the present invention, the fixing clamp is provided with a first protruding feature for cooperating with the U-shaped lock.

[0014] In a preferred embodiment of the present invention, the movable clamp is provided with a second boss feature with a hole for cooperating with the fixed boss, and the position of the hole on the second boss feature corresponds to the position of the hole on the fixed boss.

[0015] In a preferred embodiment of the present invention, a buffer rubber pad is connected to the end face of the fixed clamp and / or the movable clamp, the buffer rubber pad is arc-shaped, and an installation groove extending along its circumference is provided on the inner circumference of the buffer rubber pad.

[0016] In a preferred embodiment of the present invention, it further comprises a base, on which the fixing clamp is provided.

[0017] In a preferred embodiment of the present invention, the projection shapes of the fixed clamp, the movable clamp and the fastening and locking clamp in a plane perpendicular to the center axis of the circumferential flange are arc-shaped.

[0018] The present invention also discloses an optical fiber splice box, comprising a box cap structure, a height-adjustable optical fiber tray structure and an end face structure. The box cap structure is supported and fixed by a first assembly component, and the end face structure is supported and fixed by a positioning tool.

[0019] The beneficial effects produced by the present invention are:

[0020] 1. The present invention is not only simple in structure and easy to use, but also adds a support point to the optical fiber splice box by introducing a positioning tool. It can not only effectively fix the end face structure of the optical fiber splice box, but also provide the entire optical fiber splice box with at least two axially spaced support points, thereby effectively improving the stability and life of the optical fiber splice box.

[0021] 2. The present invention adopts the following structural design: it includes a fixed clamp, a movable clamp is connected to the fixed clamp via a first hinge shaft, a locking assembly for connecting the fixed clamp and the movable clamp is provided between the fixed clamp and the movable clamp, a first groove arranged along its circumference is provided on the fixed clamp, and a second groove arranged along its circumference is provided on the movable clamp, the first groove and the second groove cooperate to form a circular groove, the groove width of the circular groove is greater than the thickness of the circumferential flange, and the first groove and the second groove are both provided with characteristic bosses arranged at intervals along their circumference for engaging with the circumferential flange. Through the above structural design, the circumferential flange of the end face structure can be stably clamped so that it is stably limited in the axial and radial directions, and it also has the advantage of convenient assembly.

[0022] 3. The present invention also includes the following technical features: The characteristic boss includes at least two symmetrically spaced first boss portions, each having a right-angled trapezoidal cross-section. The inclined surfaces of the two first boss portions are arranged opposite each other along the axial direction of the circumferential flange. The spacing between the inclined surfaces of the two first boss portions gradually decreases from the inside to the outside along the radial direction of the circumferential flange. The minimum spacing between the inclined surfaces of the two first boss portions is no greater than the thickness of the circumferential flange. This structural design not only facilitates the clamping and installation of the circumferential flange of the end face structure, but also achieves stable fixation of the circumferential flange of the end face structure. The spacing between the inclined surfaces of the two first boss portions gradually decreases from the inside to the outside along the radial direction of the circumferential flange, ensuring that the circumferential flange is locked more and more tightly during assembly.

[0023] 4. The present invention also includes the following technical features: The characteristic boss also includes a second boss portion disposed at the bottom of the first groove or the second groove, the second boss portion having a rectangular cross-section, and two first boss portions vertically spaced apart on the second boss portion. This technical feature facilitates the processing of the first boss portion while ensuring the overall rigidity of the clamp;

[0024] 5. The present invention also includes the following technical features: the locking assembly includes a fixed locking clamp connected to the end of the movable clamp via a second hinge shaft, a U-shaped lock buckle connected to the fixed locking clamp via a third hinge shaft, and a fixed boss with a hole provided on the fixed locking clamp. The fixed clamp is provided with a first raised feature for mating with the U-shaped lock buckle, and the movable clamp is provided with a second boss feature with a hole for mating with the fixed boss, the hole in the second boss feature being positioned correspondingly to the hole in the fixed boss. The locking assembly of the present invention has the advantages of low cost and ease of operation.

[0025] 6. The present invention also includes the following technical features: A buffer rubber pad is connected to the end face of the fixed clamp and / or the movable clamp. The buffer rubber pad is arc-shaped and has a mounting groove extending along its circumference on its inner circumference. The presence of the buffer rubber pad not only prevents the optical fiber splice closure from colliding with the positioning fixture, but more importantly, when the positioning fixture is in operation, the end face structure of the optical fiber structure closure is in an open state. At this time, a large gap in the middle of the positioning fixture will cause the optical fiber splice closure to be unstable when installed on the positioning fixture. Therefore, the addition of the buffer rubber pad can fix the optical fiber splice closure in place and prevent it from easily falling off.

[0026] 7. The present invention also includes a base, on which a fixing clamp is provided. The presence of the base is more conducive to the assembly and fixing of the present invention, making it suitable for various scenarios.

[0027] 8. The present invention also discloses that the projection shape of the fixed clamp, movable clamp, and fastening locking clamp in a plane perpendicular to the central axis of the circumferential flange is an arc shape. This structural design has the advantages of small space occupation, light volume, and low manufacturing cost.

[0028] 9. The present invention provides an inflatable airbag within the characteristic boss, which not only effectively protects the end face structure of the optical fiber splice box, but also the inflated annular airbag cooperates with the inclined surfaces of the two first boss parts to fix the end face structure more stably.

[0029] 10. The present invention also discloses a fiber optic splice closure comprising a cap structure, a height-adjustable fiber tray structure, and an end face structure. The cap structure is supported and fixed by a first assembly component, and the end face structure is supported and fixed by a positioning fixture. The fiber optic splice closure has at least two support points, and its end face structure is no longer suspended. This enables the fiber optic splice closure to operate normally in various extreme weather conditions, effectively improving its operational stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0031] FIG1 is a structural diagram of an optical fiber splice closure in the prior art;

[0032] FIG2 is a structural diagram of a positioning tool according to an embodiment of the present invention;

[0033] FIG3 is a schematic diagram of a fixed state of a positioning tool according to an embodiment of the present invention;

[0034] FIG4 is a schematic diagram of a characteristic boss of a positioning tool according to an embodiment of the present invention;

[0035] FIG5 is a structural diagram of a positioning tool according to an embodiment of the present invention;

[0036] FIG6 is an exploded view of a positioning tool according to an embodiment of the present invention;

[0037] 7 is a schematic diagram of a positioning fixture fixing clamp according to an embodiment of the present invention;

[0038] FIG8 is a schematic diagram of a positioning tool movable clamp according to an embodiment of the present invention;

[0039] FIG9 is a schematic diagram of a positioning tool fastening locking pliers according to an embodiment of the present invention;

[0040] 10 is a schematic diagram of a positioning tooling buffer pad according to an embodiment of the present invention;

[0041] 11 is a schematic diagram of the third hinge axis of the positioning tooling according to an embodiment of the present invention;

[0042] FIG12 is a schematic diagram of a U-shaped lock buckle of a positioning tool according to an embodiment of the present invention;

[0043] FIG13 is a schematic diagram of a positioning tool airbag (inflated state) according to an embodiment of the present invention.

[0044] FIG14 is a schematic diagram of the installation state of the positioning tooling airbag according to an embodiment of the present invention.

[0045] In the figure: A-end face structure; B-height-adjustable optical fiber tray structure; C-box cap structure; D-circumferential flange; 1-fixed clamp; 2-first hinge; 3-movable clamp; 4-first groove; 5-second groove; 6-featured boss; 7-second hinge; 8-fastening locking clamp; 9-third hinge; 10-U-shaped lock; 11-fixed boss; 12-first raised feature; 13-second boss feature; 14-buffered rubber pad; 15-base; 16-airbag; 61-first boss portion; 62-second boss portion; 141-mounting slot; 161-inflating port; 162-groove. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] As shown in Figures 2-6, the present invention discloses a positioning tool for fixing the end face structure of the optical fiber splice closure, which is used to limit the circumferential flange D of the end face structure of the optical fiber splice closure, including a fixed clamp 1, a movable clamp 3 is connected to the fixed clamp 1 through a first hinge shaft 2, and the first hinge shaft 2 is arranged along the axial extension of the circumferential flange D. The movable clamp 3 can be rotated and opened relative to the fixed clamp 1, thereby facilitating the installation of the circumferential flange D of the end face structure of the optical fiber splice closure into the fixed clamp 1. A clamp for A locking assembly is provided to connect the two. The fixed clamp 1 is provided with a first groove 4 arranged along its circumference, and the movable clamp 3 is provided with a second groove 5 arranged along its circumference. The first groove 4 and the second groove 5 cooperate to form an annular groove. The groove width of the annular groove is greater than the thickness of the circumferential flange D. The first groove 4 and the second groove 5 are both provided with characteristic bosses 6 arranged at intervals along their circumference for clamping with the circumferential flange D. After the circumferential flange D is inserted into the characteristic boss 6, its axial freedom and radial freedom are restricted and it cannot move.

[0048] The characteristic boss 6 of the present invention can be understood as a part with a groove machined on a rectangular block. The width of the rectangular block corresponds to the width of the first groove 4 and the second groove 5. The height of the rectangular block is not greater than the depth of the first groove 4 and the second groove 5. The groove machined on the rectangular block can be trapezoidal, rectangular, etc., as long as it can adapt to the thickness of the circumferential flange D.

[0049] Preferably, the groove machined on the rectangular block can be trapezoidal, that is, the characteristic boss 6 includes at least two first boss portions 61 symmetrically arranged at intervals, the cross-sectional shape of the first boss portion 61 is a right-angled trapezoid, and the inclined surfaces of the two first boss portions 61 are arranged relatively along the axial direction of the circumferential flange D. The spacing between the inclined surfaces of the two first boss portions 61 gradually decreases from the inside to the outside along the radial direction of the circumferential flange D. The minimum spacing between the inclined surfaces of the two first boss portions 61 is not greater than the thickness of the circumferential flange D. The existence of the inclined surface feature ensures that the groove on the characteristic boss 6 is wider at the top and narrower at the bottom, so that after adapting to the circumferential flange D of the end face structure of the optical fiber junction box and fastening the movable clamp 3, the movable clamp 3 and the fixed clamp 1 can lock the circumferential flange D tighter and tighter.

[0050] Preferably, the characteristic boss 6 also includes a second boss portion 62 arranged at the bottom of the first groove 4 or the second groove 5. The cross-sectional shape of the second boss portion 62 is a rectangle, and two first boss portions 61 are vertically spaced apart on the second boss portion 62. The presence of the second boss portion 62 can effectively increase the strength and rigidity of the characteristic boss 6, because the characteristic boss 6 is a thin-walled part and it is easy to deform when clamping the circumferential flange D, which leads to failure after long-term use. The presence of the second boss portion 62 can effectively solve the failure problem.

[0051] Preferably, the characteristic bosses 6 in the first groove 4 and the second groove 5 are arranged in one-to-one correspondence, and the characteristic bosses 6 in the first groove 4 and the second groove 5 are arranged at equal intervals along their respective circumferential directions.

[0052] Preferably, as shown in Figures 8-9, the locking assembly includes a fastening locking pliers 8 connected to the end of the movable clamp 3 through the second hinge shaft 7, and a U-shaped lock 10 is connected to the fastening locking pliers 8 through the third hinge shaft 9. The fastening locking pliers 8 is also provided with a fixed boss 11 with a hole, and the fastening locking pliers 8 is connected to the movable clamp 3 through the second hinge shaft 7. The fastening locking pliers 8 can be rotated clockwise by a certain angle relative to the second hinge shaft 7. The purpose of rotating the fastening locking pliers 8 is to achieve the adaptive buckle of the U-shaped lock 10 on the fastening locking pliers 8 and the first protruding feature 12 on the fixed clamp 1. After the buckling is completed, the fastening locking pliers 8 can be rotated counterclockwise by a certain angle relative to the second hinge shaft 7, and the fixed boss 11 on the fastening locking pliers 8 cooperates with the second boss feature 13 of the movable clamp 3 to be locked by bolts and nuts.

[0053] Preferably, the fixing clamp 1 is provided with a first raised feature 12 for cooperating with the U-shaped lock buckle 10 .

[0054] Preferably, as shown in FIG12 , the U-shaped lock buckle 1 is U-shaped, with adhesive shafts provided at both ends of the U-shape, and the U-shaped lock buckle 1 can be molded by a special steel matching mold, and the final shape is an I-shape.

[0055] As shown in Figure 11, the third hinge shaft 9 that cooperates with the U-shaped lock buckle 1 is a hollow shaft. Two groups of through holes are provided on the outer peripheral surface of the hollow shaft for the two hinge shafts of the U-shaped lock buckle 1 to pass through. A through hinge hole is provided at the center of the end face of the third hinge shaft 9. The hinge hole cooperates with the hinge shaft to realize the rotatable assembly of the U-shaped lock buckle 1. The through holes, the hinge hole and the hollow part of the third hinge shaft 9 are connected to each other.

[0056] Preferably, the movable clamp 3 is provided with a second boss feature 13 with a hole for cooperating with the fixed boss 11 , and the position of the hole on the second boss feature 13 corresponds to the position of the hole on the fixed boss 11 .

[0057] Preferably, a buffer rubber pad 14 is connected to the end face of the fixed clamp 1 and / or the movable clamp 3. A plurality of buffer rubber pads 14 can be provided. The buffer rubber pad 14 is arc-shaped, and an installation groove 141 extending along its circumference is provided on the inner circumference of the buffer rubber pad 14. The buffer rubber pad 14 is made of rubber, and the circumferential flange D of the end face structure of the optical fiber splice box can be interference fit with the buffer rubber pad 14, and the end face structure of the optical fiber splice box is fixed and locked by squeezing the rubber to deform.

[0058] Preferably, the device further comprises a base 15 on which a fixing clamp is provided.

[0059] Preferably, the projection shape of the fixed clamp 1 , the movable clamp 3 and the fastening and locking clamp 8 in a plane perpendicular to the central axis of the circumferential flange D is an arc shape.

[0060] Preferably, an airbag 16 is provided in the characteristic boss 6, and the airbag 16 includes at least one inflation port 161. After the airbag 16 is inflated, it becomes an annular airbag with a square cross-section. A groove 162 for cooperating and positioning the second boss portion 62 is provided on the outer peripheral surface of the annular airbag. The airbag 16 is circumferentially limited by cooperating with the second boss portion 62 through the groove 162. The airbag 16 can elastically float radially along the circumferential flange D. The presence of the airbag 16 can not only effectively protect the end face structure of the optical fiber junction box so that its circumferential flange D will not collide with the characteristic boss during installation, but also the inflated annular airbag cooperates with the inclined surfaces of the two first boss portions to make the end face structure more stably fixed.

[0061] The present invention also discloses an optical fiber splice box, comprising a box cap structure C, a height-adjustable optical fiber disc structure B, and an end face structure A. The box cap structure C is supported and fixed by a first assembly component, and the end face structure A is supported and fixed by a positioning tool. After using the present invention, the optical fiber splice box has at least two support points, so that its end face structure is no longer suspended, thereby enabling the optical fiber splice box to work normally in various extreme weather conditions, effectively improving its working stability.

[0062] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0063] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0064] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A positioning tool for fixing the end face structure of an optical fiber splice box, characterized in that: The invention discloses a circumferential flange (D) for limiting the end face structure of an optical fiber joint box, comprising a fixed clamp (1), the fixed clamp (1) being connected to a movable clamp (3) via a first hinge shaft (2), a locking assembly for connecting the fixed clamp (1) and the movable clamp (3) being arranged between the two, the fixed clamp (1) being provided with a first groove (4) arranged along its circumference, the movable clamp (3) being provided with a second groove (5) arranged along its circumference, the first groove (4) and the second groove (5) being able to form an annular groove by cooperating with each other, the groove width of the annular groove being greater than the thickness of the circumferential flange (D), and the first groove (4) and the second groove (5) being both provided with characteristic bosses (6) arranged at intervals along their circumference for clamping with the circumferential flange (D).

2. The positioning tool for fixing the end surface structure of the optical fiber splice box according to claim 1, characterized in that: The characteristic boss (6) comprises at least two first boss portions (61) symmetrically arranged at intervals, the cross-sectional shape of the first boss portion (61) being a right-angled trapezoid, the inclined surfaces of the two first boss portions (61) being arranged opposite to each other along the axial direction of the circumferential flange (D), the spacing between the inclined surfaces of the two first boss portions (61) gradually decreasing from the inside to the outside along the radial direction of the circumferential flange (D), and the minimum spacing between the inclined surfaces of the two first boss portions (61) being no greater than the thickness of the circumferential flange (D).

3. The positioning tool for fixing the end surface structure of the optical fiber splice box according to claim 2, characterized in that: The characteristic boss (6) further comprises a second boss portion (62) arranged at the bottom of the first groove (4) or the second groove (5); the cross-sectional shape of the second boss portion (62) is a rectangle; and two first boss portions (61) are vertically spaced apart on the second boss portion (62).

4. The positioning tool for fixing the end surface structure of the optical fiber splice box according to claim 3, characterized in that: An airbag (16) is arranged inside the characteristic boss (6), and the airbag (16) includes at least one inflation port. When the airbag (16) is inflated, it becomes an annular airbag with a square cross-section, and a groove for cooperating and positioning the second boss portion (62) is arranged on the outer peripheral surface of the annular airbag.

5. The positioning tool for fixing the end surface structure of the optical fiber splice box according to claim 1, characterized in that: The locking assembly comprises a fastening locking clamp (8) connected to the end of the movable clamp (3) via a second hinge shaft (7); a U-shaped locking buckle (10) is connected to the fastening locking clamp (8) via a third hinge shaft (9); and a fixing boss (11) with a hole is also provided on the fastening locking clamp (8).

6. The positioning tool for fixing the end surface structure of the optical fiber splice box according to claim 5, characterized in that: The fixing clamp (1) is provided with a first protruding feature (12) for cooperating with the U-shaped lock buckle (10).

7. The positioning tool for fixing the end surface structure of the optical fiber splice box according to claim 5, characterized in that: The movable clamp (3) is provided with a second boss feature (13) with a hole for cooperating with the fixed boss (11), and the position of the hole on the second boss feature (13) corresponds to the position of the hole on the fixed boss (11).

8. The positioning tool for fixing the end surface structure of the optical fiber splice box according to claim 6 or 7, characterized in that: The projection shapes of the fixed clamp (1), the movable clamp (3) and the fastening locking clamp (8) in a plane perpendicular to the central axis of the circumferential flange (D) are arc-shaped.

9. The positioning tool for fixing the end surface structure of the optical fiber splice box according to claim 1, characterized in that: A buffer rubber pad (14) is connected to the end surface of the fixed clamp (1) and / or the movable clamp (3); the buffer rubber pad (14) is arc-shaped, and a mounting groove (141) extending along its circumference is provided on the inner circumferential surface of the buffer rubber pad (14).

10. The positioning tool for fixing the end surface structure of the optical fiber splice box according to claim 1, characterized in that: It also comprises a base (15), on which the fixing clamp is arranged.

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