Anti-loosening optical fiber adapter

Abstract

The invention relates to the technical field of optical fiber connection, in particular to an anti-loosening optical fiber adapter which comprises an adapter body, the adapter body comprises a shell, and the front end and the rear end of the outer side of the shell are each provided with a protruding block; the adapter body further comprises clamping pieces symmetrically arranged on the portions, on the left side and the right side of the protruding block, of the shell, the clamping piece on the right side comprises a sliding ring and a transmission assembly, the inner side of the sliding ring is open, the shell is sleeved with the sliding ring in a sliding mode, and driving plates moving oppositely or oppositely are symmetrically arranged on the inner sides of the front portion and the rear portion of the sliding ring. A clamping groove for accommodating the end part of the driving plate on the same side is formed in the right end of the shell; transmission assemblies are symmetrically arranged on the front portion and the rear portion of the right side of the sliding ring, and the transmission assembly on the front side comprises a box body and a movable plate. The problem that after an existing optical fiber adapter and an existing optical fiber connector are connected, the optical fiber adapter and the optical fiber connector are prone to loosening is solved, the connection strength between the optical fiber connector and the optical fiber adapter can be improved, and loosening between the optical fiber adapter and the optical fiber connector is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber connection, in particular to a light fiber adapter with anti-loosening function. BACKGROUND

[0002] The optical fiber adapter is a very key passive connector in the optical fiber communication system, and its core function is to precisely and stably connect the joints of two optical fibers to realize the continuous transmission of optical signals. According to the type of the connected optical fiber connector, the optical fiber adapter can be divided into FC type, SC type and LC type, etc.

[0003] The optical fiber adapter mainly includes a shell and a sleeve, the sleeve is located in the shell, and the two ends of the sleeve are used to connect the ferrule of the optical fiber connector. The outer diameter of the ferrule is slightly larger than the inner diameter of the sleeve, forming a slight interference fit. When inserted, the inner wall of the sleeve will generate a uniform and slight clamping force on the ferrule. After several insertions and extractions or due to external vibration, the inner diameter of the sleeve will slightly increase, and the outer diameter of the ferrule will slightly decrease. The gap between the ferrule and the sleeve will increase, which will cause unstable connection between them, resulting in loosening. Or the groove or bayonet site on the adapter for clamping the connector will be worn out after several insertions and extractions or due to external vibration, which will also cause unstable connection between them.

[0004] When the optical fiber connector and the optical fiber adapter are loose, the fiber core will be misaligned, causing serious attenuation of the optical signal, and thus affecting the transmission effect of the optical fiber signal. As emphasized in the authorized announcement No. CN119717154B, the optical fiber connector and the optical fiber adapter are prone to looseness due to external vibration and traction after connection. SUMMARY

[0005] To solve the problem of looseness between the existing optical fiber adapter and the optical fiber connector after connection, the present application provides a light fiber adapter with anti-loosening function, which can improve the connection strength between the optical fiber connector and the optical fiber adapter, and avoid loosening between them.

[0006] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0007] A kind of anti-loose optical fiber adapter, including adapter main body, the adapter main body includes shell, and the front and rear ends of shell outside are equipped with lug;The adapter main body further includes the clamping piece that is symmetrically arranged on the shell on the left and right sides of lug, right side clamping piece includes sliding ring and transmission assembly, the inside of sliding ring is opened, and sliding ring is sleeved outside shell, the inside of the front and rear parts of sliding ring is symmetrically equipped with the drive plate that moves oppositely or reversely, the right end of shell is equipped with the clamping groove for accommodating the end of same side drive plate;The right side of sliding ring is symmetrically equipped with transmission assembly, the front side of the transmission assembly includes box and movable plate, the left end of box is connected with sliding ring, screw rod is rotatably arranged in the box, the screw rod passes through movable plate and the nut fixed on the screw rod is sleeved on the screw rod, when the front side drive plate moves forward or backward, drive screw rod to rotate, screw rod drives movable plate to slide left and right in the box;The box between the upper and lower sides of shell is equipped with the clamping plate that moves up and down, the front and rear ends of two clamping plates are connected with connecting rod, the opposite side plate of two boxes is equipped with the sliding hole one for connecting rod to pass through, the connecting rod in the box is connected with movable plate in the box through pull rope.

[0008] Further, the front side of the drive plate is isosceles trapezoidal plate body with the front end length greater than the rear end length;The sliding ring is provided with a driving member for driving the two drive plates to move oppositely or reversely, the driving member includes a spring and a vertical plate, the opposite faces of the two drive plates are connected with the inner side of the sliding ring through the spring, the upper and lower parts of the sliding ring are symmetrically provided with the vertical plate, the inner side of the sliding ring is opened, and the upper and lower ends of the inner side are fixed with a horizontal plate, the upper end of the upper vertical plate is located outside the sliding ring, and the lower end is movably extended into the sliding ring, the lower end of the upper vertical plate is connected with the upper horizontal plate through a spring, and the bottom surface of the upper vertical plate is respectively contacted with the upper inclined surface of the drive plate in the front and rear parts of the sliding ring.

[0009] Further, the opposite end faces of the two drive plates are respectively provided with a ball, when the balls on the two drive plates are respectively contacted with the front and rear side surfaces of the shell, the spring connected with the two vertical plates is in a half stretched state, and each spring is in a completely compressed state;When the balls on the two drive plates are contacted with the inner bottom of the clamping groove on the same side, each spring is in a half compressed state, and each spring is in a completely stretched state.

[0010] Further, when the right side of the sliding ring is contacted with the lug, the right ends of the two boxes and the right ends of the clamping plates are flush with the right end of the shell;When the balls on the two drive plates are contacted with the inner bottom of the clamping groove on the same side, the left ends of the two movable plates are located on the right side of the shell.

[0011] Further, the right side of the two drive plates is recessed with a groove, the top surface of each groove is spaced apart with a tooth, the right end of each screw rod is rotatably connected with the right side plate of the box, and the left end is sequentially movably penetrated through the left side plate of the box and the right side plate of the sliding ring on the same side, the left end of the screw rod is connected with a gear, and the gear is engaged with the teeth on the top surface of the groove.

[0012] Further, the upper and lower ends of each movable plate are spaced from the upper and lower side plates of the box body, and the left and right ends of the movable plate are spaced from the left and right side plates of the box body.

[0013] Further, the right side of the box body is provided with two slide holes on the left and right parts of the side plate, and each clamping plate is connected with a sliding block that extends into the same side slide hole.

[0014] Further, the opposite sides of the two clamping plates are provided with connecting plates, and the front and rear ends of each connecting plate are fixedly connected with two box bodies.

[0015] Further, when the rolling balls on the two driving plates contact the front and rear side surfaces of the shell, the pull ropes connecting the front and rear sides of the two clamping plates to the movable plates are in a vertical state, the springs three connected to the two clamping plates are in a natural state, and the opposite surfaces of the two clamping plates are spaced from the shell.

[0016] Further, the front and rear side plates of each sliding ring are threadedly connected with a limiting bolt, the rod part of each limiting bolt is misaligned with the groove on the same side driving plate, and the rod part of the limiting bolt is provided with a lock washer.

[0017] Through the above technical solutions, the present application has the following advantages:

[0018] 1. In the initial state, the clamping part is located outside the shell, which does not affect the connection of the fiber connector and the adapter body; after the connection is completed, the sliding ring moves along the shell, and the two clamping plates are located outside the same side fiber connector, at this time, the two driving plates in the sliding ring are limited in the slot, in this process, the transmission assembly can drive the relative movement of the two clamping plates to complete the clamping and limiting of the fiber connector, which can avoid the loosening of the fiber connector from the adapter body due to external force and repeated plugging, and improve the connection strength of the fiber adapter and the fiber connector.

[0019] 2. The sliding sliding ring completes the limiting of the fiber connection, the vertical plate is pressed, the end part of the driving plate is separated from the slot, and then the sliding sliding ring is slid, so that the clamping of the fiber connector is released, and the clamping and releasing of the fiber connector are conveniently realized, without the need for additional tools, which reduces the operation difficulty and effectively prevents installation errors or low efficiency caused by complicated steps. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1is a structural schematic diagram of the present application;

[0021] Figure 2 is a structural schematic diagram of the adapter body of the present application;

[0022] Figure 3 is a structural schematic diagram of the clamping piece of the present application;

[0023] Figure 4 is a structural schematic diagram of the connection of the driving plate, transmission assembly and clamping plate of the present application;

[0024] Figure 5 is a sectional right view (sectioned at the driving plate) of the present application;

[0025] Figure 6 is a sectional top view at the screw rod of the present application;

[0026] Figure 7 is a sectional top view of the connection of the clamping plate and the box body of the present application;

[0027] Figure 8 is a sectional right view of the clamping plate connecting two box bodies of the present application.

[0028] In the drawings, the reference signs are: 1, housing, 2, protruding block, 3, sliding ring, 4, driving plate, 5, clamping groove, 6, box body, 7, movable plate, 8, screw rod, 9, nut, 10, clamping plate, 11, sliding hole one, 12, connecting rod, 13, pull rope, 14, spring one, 15, vertical plate, 16, horizontal plate, 17, spring two, 18, recess, 19, tooth, 20, gear, 21, guide rod, 22, sliding hole two, 23, sliding block, 24, anti-skid pattern, 25, connecting plate, 26, spring three, 27, limiting bolt, 28, anti-loosening washer, 29, ball. DETAILED DESCRIPTION

[0029] The present application is further described below in combination with the drawings and specific embodiments:

[0030] As Figures 1-8As shown, a kind of anti-loose optical fiber adapter, including adapter main body, the adapter main body includes shell 1, and the front and rear ends of shell 1 outside are equipped with lug 2;The adapter main body further includes the clamping piece that is symmetrically arranged on the shell 1 on the left and right sides of lug 2, and the right clamping piece includes sliding ring 3 and transmission assembly, the sliding ring 3 is hollow rectangular ring with inner side sliding contact shell 1, the sliding ring 3 is opened in the inside, and slidingly covers shell 1, and the inside of the front and rear parts of sliding ring 3 is equipped with the driving plate 4 that moves oppositely or reversely, and the right end of shell 1 is equipped with the clamping groove 5 for accommodating the end of the driving plate 4 on the same side, the clamping groove 5 is rectangular slot body along the height direction of shell 1;The right side of sliding ring 3 is equipped with transmission assembly symmetrically, and the transmission assembly on the front side includes box body 6 and movable plate 7, and the front side box body 6 is hollow cuboid with rear end opening being blocked by rear plate, and the opposite surfaces of the two box bodies 6 are slidingly contacted with the right side surfaces of shell 1, and the left end of box body 6 is connected with sliding ring 3, and screw rod 8 is rotatably arranged in box body 6, the screw rod 8 passes through movable plate 7, and the nut 9 outside screw rod 8 is fixed on movable plate 7, and the nut 9 is located in movable plate 7 and corresponds with screw rod, when screw rod rotates, nut drives movable plate 7 to move along the axial direction of screw rod, when front side driving plate 4 moves forward or backward, driving screw rod 8 rotates, and screw rod 8 drives movable plate 7 to slide left and right in box body 6;The clamping plate 10 that moves up and down is arranged between the box bodies 6 on the upper and lower sides of shell 1, and the connecting rod 12 is connected to the front and rear ends of the two clamping plates 10, and the slide hole one 11 for the connecting rod 12 to pass through is arranged on the opposite side plates of the two box bodies 6, the slide hole one 11 is long strip-shaped hole along the height direction of box body 6, and the connecting rod 12 is circular rod body with diameter corresponding with slide hole one 11, and the connecting rod 12 in box body 6 is connected with movable plate 7 in box body 6 through pull rope 13, and one end of connecting rod 12 and pull rope 13 is inserted into the inside of box body 6;The helix angle of the selected screw rod 8 of the application is designed to be less than the friction angle, so that the screw pair has self-locking characteristics, and the movable plate 7 can be prevented from moving reversely under the external force of screw rod, so as to maintain the clamping state.

[0031] The front side driving plate 4 is an isosceles trapezoidal plate body with a front end length greater than a rear end length, the front end length is the distance between the upper and lower ends of the front side, and the rear end length is the distance between the upper and lower ends of the rear side; the sliding ring 3 is provided with a driving member for driving the two driving plates 4 to move towards or away from each other, the driving member comprises a spring 14 and a vertical plate 15, the opposite sides of the two driving plates 4 are connected to the inner side of the sliding ring 3 through the spring 14, the spring 14 is a compression spring, the left and right sides of each driving plate 4 are in sliding contact with the left and right inner sides of the sliding ring 3, the upper and lower ends of the long side (such as the front end of the front side driving plate 4) of the driving plate 4 are in sliding contact with the upper and lower inner sides of the sliding ring 3, the upper and lower parts of the sliding ring 3 are symmetrically provided with the vertical plate 15, the inner side of the sliding ring 3 is fixed with a horizontal plate 16 at the upper and lower ends of the opening, the upper end of the upper vertical plate 15 is located outside the sliding ring 3, and the lower end is movably inserted into the sliding ring 3, the lower end of the upper vertical plate 15 is connected to the upper horizontal plate 16 through a spring 17, the spring 17 is a tensile spring, and the bottom surface of the upper vertical plate 15 is in contact with the upper inclined surface of the driving plate 4 on the front and rear parts of the sliding ring 3.

[0032] The opposite sides of the two driving plates 4 are provided with a ball 29, when the balls 29 on the two driving plates 4 are in contact with the front and rear sides of the shell 1, the spring 17 connected by the two vertical plates 15 is in a semi-tensioned state, and each spring 14 is in a completely compressed state; when the balls 29 on the two driving plates 4 are in contact with the inner bottom of the same side slot 5, the inner bottom of the slot 5 is the side opposite to the opening of the slot 5, each spring 14 is in a semi-compressed state, and each spring 17 is in a completely tensile state.

[0033] When the right side sliding ring 3 is in contact with the protrusion 2, the right ends of the two box bodies 6 and the right end of the clamping plate 10 are flush with the right end of the shell 1; when the balls 29 on the two driving plates 4 are in contact with the inner bottom of the same side slot 5, the left ends of the two movable plates 7 are located on the right side of the shell 1.

[0034] The right side of the two driving plates 4 is recessed with a groove 18, the groove 18 is a rectangular slot along the width direction of the driving plate 4, and the top surface of each groove 18 is provided with a tooth 19 at intervals; the right end of each lead screw 8 is rotatably connected to the right side plate of the box body 6, and the left end is sequentially movably inserted through the left side plate of the box body 6 and the right side plate of the same side sliding ring 3, the left end of the lead screw 8 is connected with a gear 20, and the gear 20 meshes with the teeth 19 on the top surface of the groove 18.

[0035] The movable plate 7 is a rectangular plate which is in sliding contact with the inner side of the box body 6 on the front and rear sides, the upper and lower ends of each movable plate 7 are spaced apart from the upper and lower side plates of the box body 6, the left and right ends of the movable plate 7 are spaced apart from the left and right side plates of the box body, the upper and lower parts of the box body 6 are provided with a guide rod 21, the right end of each guide rod 21 is connected to the right side plate of the box body 6, and the left end is movably inserted through the movable plate 7 and connected to the left side plate of the box body 6.

[0036] The right side of the box body 6 is provided with a sliding hole two 22 on the left and right parts of the side plate of the shell, the sliding hole two 22 is a long strip hole opened along the height direction of the box body 6, the end of each clamping plate 10 is connected with a sliding block 23 which extends into the sliding hole two 22 of the same side, the sliding block 23 is a rectangular block which is in sliding contact with the sliding hole two 22, and the opposite sides of the two clamping plates 10 are provided with anti-skid lines 24.

[0037] The opposite sides of the two clamping plates 10 are provided with connecting plates 25, the front and rear ends of each connecting plate 25 are fixedly connected with two box bodies 6 respectively, and each clamping plate 10 is connected with the connecting plate 25 of the same side through a spring three 26.

[0038] When the two driving plates 4 on the right side are contacted with the front and rear sides of the shell 1, the pull ropes 13 of the two clamping plates 10 connected with the movable plates 7 are in a vertical state, the springs three 26 connected with the two clamping plates 10 are in a natural state, and the opposite sides of the two clamping plates 10 are spaced apart from the shell 1.

[0039] The front and rear side plates of each sliding ring 3 are threadedly connected with a limiting bolt 27, the rod part of each limiting bolt 27 is dislocated with the groove 18 on the driving plate 4 of the same side, the rod part of the limiting bolt 27 is provided with a lock washer 28, the driving plate 4 is contacted with the bottom of the clamping groove 5, and the free end of the rod part of the limiting bolt 27 on the same side is tightly contacted with the driving plate 4, and the lock washer 28 is tightly pressed between the head of the limiting bolt 27 and the sliding ring 3.

[0040] In the initial state, the sliding ring 3 on the clamping part is contacted with the protrusion 2, and the limiting bolt 27 on each sliding ring 3 is disengaged from the sliding ring 3, so as to avoid affecting the movement of the driving plate 4; the present application is suitable for SC type adapter (the SC type adapter is a square plastic plug-in type, buckle connection, push-pull design, plug-in convenient, high density, and is the most mainstream type of data center and local area network);

[0041] In use, the sleeve in the shell 1 of the adapter body is connected with the fiber connector at both ends, after the connection is completed, taking the right clamping piece as an example, the two vertical plates 15 are pushed, and the two vertical plates 15 drive the sliding ring 3 to move to the right, the sliding ring 3 drives the driving plate 4 to move to the right, the ball 29 on the driving plate 4 helps to reduce the friction resistance between the driving plate 4 and the shell 1, until the end of the two driving plates 4 is located outside the corresponding clamping groove 5, at this time, the left end of the two clamping plates 10 is located on the right side of the shell 1, under the action of the restoring force of the spring 14, the two driving plates 4 move relatively, so that the end of each driving plate 4 extends into the corresponding clamping groove 5, when the ball 29 on the driving plate 4 contacts the inner bottom of the corresponding clamping groove 5, the spring 14 connected with the driving plate 4 is in a semi-compressed state, the inclined surface of the driving plate 4 presses the contacting vertical plate 15, the two vertical plates 15 move away from each other, so that the spring 17 connected with the vertical plate 15 is in a completely stretched state, and in this process, the teeth 19 on the driving plate 4 drive the gear 20 to rotate, the lead screw 8 connected with the gear 20 rotates, when the lead screw 8 rotates, the movable plate 7 connected with the lead screw 8 moves to the right, the pull rope 13 connected with the movable plate 7 becomes inclined, the movable plate 7 can drive the two clamping plates 10 to move relatively through the pull rope 13, the spring 3 connected with each clamping plate is stretched, when the ball 29 on the driving plate 4 contacts the inner bottom of the corresponding clamping groove 5, the two clamping plates 10 complete clamping and limiting of the fiber connector; subsequently, the limiting bolt 27 is screwed on the front and rear side plates of the sliding ring 3 where the driving plate 4 is located, so that the rod free end of each limiting bolt 27 tightly presses the driving plate 4 on the same side, at this time, the lock washer 28 is tightly pressed between the head of the limiting bolt 27 and the sliding ring 3, the lock washer 28 can prevent the limiting bolt 27 from loosening due to external vibration, the limiting bolt 27 tightly presses and limits the driving plate 4, so as to prevent the driving plate 4 from being displaced due to external vibration, thereby avoiding the displacement of the clamping plate 10 and affecting the clamping and limiting of the fiber connector by the clamping plate 10;

[0042] Similarly, the left clamping piece repeats the above process to complete the clamping and limiting of the fiber connector on the left side;

[0043] When the right clamping member needs to be released from clamping the optical fiber connector, two limiting bolts 27 on the right sliding ring 3 are unscrewed, the user presses the two opposite ends of the two vertical plates 15 outside the right sliding ring 3 with fingers at the same time, so that the two vertical plates 15 move relatively until the two spring 17 connected by the two vertical plates 15 are in a semi-stretched state, in the process of downward movement of the upper vertical plate 15, the bottom surface of the upper vertical plate 15 presses the upper inclined surface of the two driving plates 4, the lower vertical plate 15 moves upward, the top surface of the lower vertical plate 15 presses the lower inclined surface of the two driving plates 4, when the two spring 17 connected by the two vertical plates 15 are in a semi-stretched state, the two vertical plates 15 move to the limit state, at this time, the end of the two driving plates 4 and the ball at the end are all out of the slot 5, the spring 14 connected by the two driving plates 4 is compressed to the limit state, in this process, the two driving plates 4 move in opposite directions, the teeth 19 on each driving plate 4 drives the gear 20 engaged by the teeth 19 to rotate in the opposite direction, the lead screw 8 connected with the gear 20 rotates in the opposite direction with the gear 20, the movable plate 7 moves leftwards driven by the rotation of the lead screw 8, the movable plate 7 changes the inclined state of the pull rope 13 to the vertical state, the pull rope 13 releases the traction on the connected connecting rod 12, the two clamping plates 10 move in opposite directions to return to the initial state under the restoring force of the spring 26 connected by the two clamping plates 10, and the clamping on the optical fiber connector is released.

[0044] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various modifications can be made to the technical solutions of the present application without departing from the spirit of the present application, i.e., the disclosed scope.

Claims

1. A loosening-proof optical fiber adapter, comprising an adapter main body, the adapter main body comprising a shell (1), and a protrusion (2) arranged at each of the front and rear ends of the shell (1); characterized in that, The adapter body further comprises clamping members symmetrically arranged on the left and right sides of the convex block (2) on the shell (1), the right clamping member comprises a sliding ring (3) and a transmission assembly, the sliding ring (3) is open on the inner side and is sleeved on the outer side of the shell (1), the front and rear parts of the sliding ring (3) are symmetrically provided with driving plates (4) moving in opposite directions, and the right end of the shell (1) is provided with a clamping groove (5) for accommodating the end of the driving plate (4) on the same side.

2. The anti-loose fiber optic adapter of claim 1, wherein, The right side of the sliding ring (3) is symmetrically provided with the transmission assembly, the transmission assembly on the front side comprises a box body (6) and a movable plate (7), the left end of the box body (6) is connected with the sliding ring (3), a lead screw (8) is rotatably arranged in the box body (6), the lead screw (8) penetrates through the movable plate (7), and a nut (9) sleeved on the outer side of the lead screw (8) is fixed on the movable plate (7), when the driving plate (4) on the front side moves forward or backward, the lead screw (8) is driven to rotate, and the lead screw (8) drives the movable plate (7) to slide leftward and rightward in the box body (6); the clamping plates (10) moving up and down are arranged between the box bodies (6) on the upper and lower sides of the shell (1), the front and rear ends of the two clamping plates (10) are connected with connecting rods (12), the opposite sides of the two box bodies (6) are provided with sliding holes (11) for the connecting rods (12) to penetrate, and the connecting rods (12) in the box bodies (6) are connected with the movable plates (7) in the box bodies (6) through pull ropes (13).

3. The anti-loose fiber optic adapter of claim 2, wherein, The driving plate (4) on the front side is an isosceles trapezoidal plate body with the length of the front end being greater than that of the rear end; the sliding ring (3) is provided with a driving member for driving the two driving plates (4) to move in opposite directions, the driving member comprises a spring (14) and a vertical plate (15), the opposite faces of the two driving plates (4) are connected with the inner side of the sliding ring (3) through the spring (14), the upper and lower parts of the sliding ring (3) are symmetrically provided with the vertical plate (15), the inner side of the sliding ring (3) is fixed with horizontal plates (16) at the upper and lower ends, the upper end of the upper vertical plate (15) is located outside the sliding ring (3), the lower end is movably inserted into the sliding ring (3), the lower end of the upper vertical plate (15) is connected with the upper horizontal plate (16) through a spring (17), and the bottom face of the upper vertical plate (15) contacts the upper inclined face of the driving plate (4) on the front or rear part of the sliding ring (3).

4. The anti-loose fiber optic adapter of claim 2, wherein, The opposite end faces of the two driving plates (4) are respectively provided with rolling balls (29), when the rolling balls (29) on the two driving plates (4) contact the front and rear faces of the shell (1), the springs (17) connected with the two vertical plates (15) are in a half-stretched state, and each spring (14) is in a completely compressed state; when the rolling balls (29) on the two driving plates (4) contact the inner bottom of the clamping groove (5) on the same side, each spring (14) is in a half-compressed state, and each spring (17) is in a completely stretched state. When the right sliding ring (3) contacts the convex block (2), the right ends of the two box bodies (6) and the right end of the clamping plate (10) are flush with the right end of the shell (1); when the rolling balls (29) on the two driving plates (4) contact the inner bottom of the clamping groove (5) on the same side, the left ends of the two movable plates (7) are located on the right side of the shell (1).

5. The anti-loose fiber optic adapter of claim 3, wherein, The right side of each of the two driving plates (4) is concave, and a groove (18) is formed on the right side of each of the two driving plates (4). The top surface of each groove (18) is provided with a plurality of teeth (19) at intervals. The right end of each lead screw (8) is rotatably connected to the right side plate of the box body (6), and the left end of each lead screw (8) is sequentially movably penetrated through the left side plate of the box body (6) and the right side plate of the same side sliding ring (3). The left end of the lead screw (8) is connected with a gear (20), and the gear (20) is engaged with the teeth (19) on the top surface of the groove (18).

6. The anti-loose fiber optic adapter of claim 1, wherein, The upper end and the lower end of each movable plate (7) are spaced apart from the upper side plate and the lower side plate of the box body (6) in which the movable plate (7) is arranged. The left end and the right end of the movable plate (7) are spaced apart from the left side plate and the right side plate of the box body (6). The upper part and the lower part of the box body (6) are both provided with a guide rod (21). The right end of each guide rod (21) is connected to the right side plate of the box body (6), and the left end of each guide rod (21) is movably penetrated through the movable plate (7) and connected to the left side plate of the box body (6).

7. The anti-loose fiber optic adapter of claim 1, wherein, The right side of each of the two driving plates (4) is concave, and a groove (18) is formed on the right side of each of the two driving plates (4). The top surface of each groove (18) is provided with a plurality of teeth (19) at intervals. The right end of each lead screw (8) is rotatably connected to the right side plate of the box body (6), and the left end of each lead screw (8) is sequentially movably penetrated through the left side plate of the box body (6) and the right side plate of the same side sliding ring (3). The left end of the lead screw (8) is connected with a gear (20), and the gear (20) is engaged with the teeth (19) on the top surface of the groove (18).

8. The anti-loose fiber optic adapter of claim 3, wherein, The right side of each of the two driving plates (4) is concave, and a groove (18) is formed on the right side of each of the two driving plates (4). The top surface of each groove (18) is provided with a plurality of teeth (19) at intervals. The right end of each lead screw (8) is rotatably connected to the right side plate of the box body (6), and the left end of each lead screw (8) is sequentially movably penetrated through the left side plate of the box body (6) and the right side plate of the same side sliding ring (3). The left end of the lead screw (8) is connected with a gear (20), and the gear (20) is engaged with the teeth (19) on the top surface of the groove (18).

9. The anti-loose fiber optic adapter of claim 8, wherein, When the right side of each of the two driving plates (4) is contacted by the balls (29) on the right side of each of the two driving plates (4), the pulling ropes (13) of the two clamping plates (10) connected to the movable plates (7) are in a vertical state, the springs (26) connected to the two clamping plates (10) are in a natural state, and the opposite surfaces of the two clamping plates (10) are spaced apart from each other.

10. The anti-loose fiber optic adapter of claim 5, wherein, ​

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