Fixture for optical fiber end face detector

Abstract

The utility model discloses a clamp for an optical fiber end face detector. The clamp comprises a clamp base and a clamp body. A rotary knob screw hole is formed in one side of the clamp base and is spirally connected with a rotary knob assembly, and the rotary knob assembly comprises a rotary knob handle part and a rotary knob screw rod. A first body pressing hole is formed in the side, close to the rotary knob screw hole, of the clamp body. A base pressing hole is formed in the other side of the clamp base and fixedly connected with a base pressing rod, and the base pressing rod is sleeved with a base spring. The clamp body can be pressed or loosened by rotating the knob handle part, after an optical fiber is installed on the clamp body, the inclination angle of the clamp body can be adjusted by rotating the knob assembly according to the angle of the end face of the optical fiber, and after adjustment, the clamp body is fixed by rotating the knob assembly. Therefore, the purpose that one clamp is difficult to clamp optical fibers using connectors of different models to detect the end faces of the optical fibers is achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of optical fiber end face inspection instruments, and particularly relates to a fixture for optical fiber end face inspection instruments. Background Technology

[0002] During the production and use of optical fibers, it is necessary to use an optical fiber end face inspection instrument to detect dirt on the optical fiber end face to ensure that the end face of the optical fiber meets the splicing requirements during splicing.

[0003] When using different types of connectors, the fiber end face and the fiber surface are not necessarily perpendicular. Most existing clamps are designed for the angle between a specific fiber end face and the fiber surface, i.e. for a specific connector, making it difficult to clamp fibers using different types of connectors to test the end face. Utility Model Content

[0004] The purpose of this invention is to provide a fixture for an optical fiber end-face inspection instrument, so as to solve the problem that the fixture currently used in optical fiber end-face inspection instruments is difficult to clamp optical fibers using different types of connectors for end-face inspection.

[0005] To address the aforementioned issues, this utility model provides a fixture for an optical fiber end-face inspection instrument, comprising a fixture base and a fixture body. The fixture base is U-shaped, and a body groove is provided in the middle of the fixture base for accommodating the fixture body.

[0006] A knob screw hole is provided on one side of the fixture base. A knob assembly is screwed to the knob screw hole. The knob assembly includes a knob handle and a knob screw. The knob handle and the knob screw are fixedly connected. The knob screw is screwed to the knob screw hole. The knob screw passes through one side of the fixture base and enters the groove of the body.

[0007] A first body clamping hole is provided on the side of the clamp body near the knob screw hole. The first body clamping hole is used to accommodate the knob screw that enters the groove of the body.

[0008] The other side of the fixture base is provided with a base clamping hole, which is connected to the groove of the body. A base clamping rod is fixedly connected to the base clamping hole, and a base spring is sleeved on the base clamping rod. The outer diameter of the base spring is larger than the inner diameter of the base clamping hole.

[0009] A second body clamping hole is provided on the other side of the first body clamping hole. The inner diameter of the second body clamping hole is larger than the outer diameter of the base spring. A third body clamping hole is provided at the end of the second body clamping hole near the first body clamping hole. The inner diameter of the third body clamping hole is smaller than the outer diameter of the base spring and larger than the diameter of the base clamping rod. The base spring abuts against the junction of the second body clamping hole and the third body clamping hole. One end of the base clamping rod passes through the second body clamping hole and is inserted into the third body clamping hole.

[0010] An angle marking section is provided on one side of the fixture base, and an angle indicator line is provided on the fixture body near the angle marking section. The angle marking section and the angle indicator line are used to display the tilt angle of the fixture body.

[0011] The fixture body is also rotatably connected to an optical fiber clamping assembly.

[0012] Furthermore, a rotating through hole is provided on the part of the clamp body near the second body clamping hole. The fiber clamping assembly includes a rotating arm. The rotating through hole is used for the clamp body and the rotating arm to rotate. A rotating shaft is provided in the rotating arm and the rotating through hole. The two ends of the rotating arm and the rotating shaft are fixedly connected. The rotating shaft passes through the rotating through hole.

[0013] Furthermore, a fiber optic clamping groove is provided in the middle of the fixture body, which is used to place the fiber optic cable to be tested.

[0014] A fiber optic clamping hole is provided on the inner wall of one side of the fiber optic clamping groove.

[0015] A fiber optic clamping rod is inserted through the fiber optic clamping hole. The clamping end of the fiber optic clamping rod is set in the fiber optic clamping groove. The clamping end is used to clamp the fiber optic connector. A clamping handle is fixedly connected to the end of the fiber optic clamping rod away from the clamping end.

[0016] A clamping spring is installed on the fiber optic clamping rod, and a clamping flange is also provided on the fiber optic clamping rod. One end of the clamping spring abuts against the clamping flange, and the other end of the clamping spring abuts against the clamping cover plate. The clamping cover plate is located between the fiber optic clamping hole and the clamping handle. The clamping cover plate is fixedly connected to the clamp body. A through hole is provided in the middle of the clamping cover plate for the fiber optic clamping rod to pass through.

[0017] Furthermore, the clamping cover plate is fixedly connected to the fixture body by screws.

[0018] Furthermore, the rotating arm is L-shaped, with the vertical part of the rotating arm closest to the clamping handle, and the vertical part is fixedly connected to the rotating shaft.

[0019] The part of the rotating arm that is perpendicular to the vertical part is the horizontal part, and an optical fiber clamping block is provided on the side of the horizontal part near the optical fiber clamping groove.

[0020] Furthermore, a rotating arm screw hole is provided on the horizontal part, and an upper clamping block first hole is provided on the optical fiber clamping block. An upper clamping block screw is rotatably connected in the rotating arm screw hole, and the upper clamping block screw extends into the upper clamping block first hole.

[0021] Furthermore, two spring fixing holes are provided on the horizontal part, and an upper spring rod is provided in the spring fixing hole. An upper clamping block spring is sleeved on the upper spring rod. The spring fixing hole is fixedly connected to the upper clamping block spring. Two upper clamping block second holes are provided on the side of the upper clamping block near the horizontal part. The upper clamping block spring extends into the upper clamping block second hole and is fixedly connected to the upper clamping block second hole. The upper clamping block spring is in a stretched state.

[0022] Furthermore, a clamping rod receiving groove is provided on the side of the clamping block on the optical fiber away from the horizontal part, and the inner diameter of the clamping rod receiving groove is larger than the diameter of the optical fiber clamping rod in the groove of the body.

[0023] Furthermore, a limiting block is provided on the side of the horizontal part facing the fixture body, and a limiting groove is provided on the fixture body. The limiting groove is used to accommodate the limiting block to limit the rotation arm.

[0024] Furthermore, the fixture base is provided with several base fixing holes, which are used to fix the fixture base.

[0025] The advantages of the fiber optic end-face inspection fixture provided by this utility model are as follows: Compared with the prior art, a knob screw hole is provided on one side of the fixture base, and a knob assembly is screwed into the knob screw hole. The knob assembly includes a knob handle and a knob screw. Rotating the knob handle can tighten or loosen the fixture body. After the optical fiber is installed on the fixture body, the tilt angle of the fixture body can be adjusted by rotating the knob assembly according to the angle of the optical fiber end face. After adjustment, the knob assembly is rotated again to fix the fixture body, thereby achieving the purpose of using a fixture to clamp optical fibers using different connectors for fiber optic end-face inspection. Attached Figure Description

[0026] Figure 1 This is a front view schematic diagram of the fixture used in the fiber optic end-face inspection instrument;

[0027] Figure 2 This is a cross-sectional schematic diagram of the fixture used in the fiber optic end-face inspection instrument.

[0028] Figure 3 This is a side view of the fixture base;

[0029] Figure 4 This is a first side view of the fixture body;

[0030] Figure 5 This is a second side view of the fixture body;

[0031] Figure 6 This is a side view of the clamping block on the optical fiber;

[0032] Figure 7 This is a side view of the rotating arm. Detailed Implementation

[0033] To better understand the purpose, structure, and function of this utility model, the following description is in conjunction with the appendix. Figures 1 to 7 The present invention provides a more detailed description of a fixture for an optical fiber end face inspection instrument.

[0034] like Figures 1 to 7 As shown in the figure, an embodiment of the present invention provides a fixture for an optical fiber end face inspection instrument. The device includes a fixture base 200 and a fixture body 100. The fixture base 200 is U-shaped, and a body groove 210 is provided in the middle of the fixture base 200 for accommodating the fixture body 100.

[0035] In this invention, a knob screw hole 220 is provided on one side of the clamp base 200. A knob assembly 230 is screwed into this screw hole 220. The knob assembly 230 includes a knob handle portion 231 and a knob screw 232. The knob handle portion 231 and the knob screw 232 are fixedly connected. The knob screw 232 is screwed into the knob screw hole 220 and passes through one side of the clamp base 200 and enters the body groove 210. A base clamping hole 240 is provided on the other side of the clamp base 200. The base clamping hole 240 communicates with the body groove 210. A base clamping rod 250 is fixedly connected to the base clamping hole 240. A base spring 260 is sleeved on the base clamping rod 250. The outer diameter of the base spring 260 is larger than the inner diameter of the base clamping hole 240.

[0036] A first body clamping hole 110 is provided on the side of the clamp body 100 near the knob screw hole 220. The first body clamping hole 110 is used to accommodate the knob screw 232 that enters the body groove 210. A second body clamping hole 120 is provided on the other side of the first body clamping hole 110. The inner diameter of the second body clamping hole 120 is larger than the outer diameter of the base spring 260. A third body clamping hole 130 is provided at the end of the second body clamping hole 120 near the first body clamping hole 110. The inner diameter of the third body clamping hole 130 is smaller than the outer diameter of the base spring 260 but larger than the diameter of the base clamping rod 250. The base spring 260 abuts against the junction of the second body clamping hole 120 and the third body clamping hole 130. One end of the base clamping rod 250 passes through the second body clamping hole 120 and is inserted into the third body clamping hole 130.

[0037] Understandably, an angle marking section 270 is provided on one side of the clamp base 200, and an angle indicator line 170 is provided on the clamp body 100 near the angle marking section 270. The angle marking section 270 and the angle indicator line 170 are used to display the tilt angle of the clamp body 100. Furthermore, an optical fiber clamping assembly is rotatably connected to the clamp body 100.

[0038] In use, the clamp body 100 can be loosened or clamped by rotating the knob handle 231, and the fiber optic connector 400 with the fiber optic cable 500 can be inserted. At this time, the clamp body 100 and the clamp base 200 are in a relatively fixed position. The knob screw 232 abuts against the clamp body 100 in the knob screw hole 220, applying a force to the clamp body 100 towards the base pressing hole 240. On the side of the clamp body 100 opposite to the knob screw 232, it is subjected to the pressure of the base spring 260. One end of the base spring 260 abuts against the inside of the clamp body 100, and the other end abuts against the clamp base 200. When the pressure of the knob screw 232 on the clamp body 100 reaches a certain level, the clamp body 100 is subjected to the combined force of the knob screw 232 and the base spring 260, and the clamp body 100 and the clamp base 200 maintain a relatively stable state, and the position of the clamp body 100 relative to the clamp base 200 will not change.

[0039] If the end face of the optical fiber 500 is not parallel to the detection camera of the optical fiber end face detector, the angle of the optical fiber end face needs to be adjusted. In this case, the knob handle 231 needs to be rotated, causing the knob screw 232 to move away from the clamp body 100. During this process, the pressure of the base spring 260 on the clamp body 100 gradually decreases. When this pressure decreases to a certain level, the clamp body 100 can rotate around the knob screw 232 and the base clamping rod 250 as axes. At this point, the angle of the clamp body 100 relative to the detection camera of the optical fiber end face detector can be adjusted, i.e., the angle between the end face of the optical fiber 500 and the detection camera of the optical fiber end face detector. Since the tilt angle of different optical fiber connectors 400 is known, and this tilt angle is the same as the tilt angle of the end face of the optical fiber 500, the clamp body 100 can be adjusted according to the known tilt angle of the end face of the optical fiber 500 and the angle of the angle marking part 270 indicated by the reference angle indicator line 170 during the rotation of the clamp body 100. The end face of the fiber optic 500 is aligned with the inspection camera of the fiber optic end face inspection instrument. If the inspection camera of the fiber optic end face inspection instrument is parallel to and perpendicular to the ground, then the end face of the fiber optic 500 is also perpendicular to the ground. The fixture body 100 can be adjusted at any angle within a certain range, thus accommodating various fiber optic connectors 400, allowing for the inspection of the end faces of various fiber optic 500s without changing the fixture.

[0040] The fiber optic clamping assembly includes a rotating arm, and a rotating through hole 140 is provided on the part of the clamping body 100 near the second body clamping hole 120. The rotating through hole 140 is used for rotatable connection between the clamping body 100 and the rotating arm. A rotating shaft 320 is provided in the rotating arm and the rotating through hole 140. The rotating arm is fixedly connected to both ends of the rotating shaft 320, and the rotating shaft 320 passes through the rotating through hole 140.

[0041] When installing or removing the fiber optic connector 400, the rotating arm can be lifted and rotated around the rotating shaft 320, allowing the operator to easily remove the fiber optic connector 400 from or install it onto the clamp body 100.

[0042] In this invention, a fiber optic clamping groove 150 is provided in the middle of the fixture body 100, which is used to place the fiber optic cable to be tested. A fiber optic clamping hole 160 is provided on the inner wall of one side of the fiber optic clamping groove 150; the fiber optic clamping hole 160 communicates with the fiber optic clamping groove 150. A fiber optic clamping rod 330 is inserted through the fiber optic clamping hole 160, and the clamping end 331 of the fiber optic clamping rod 330 is provided in the fiber optic clamping groove 150. The clamping end 331 is used to clamp the fiber optic connector 400, and a clamping handle 332 is fixedly connected to the end of the fiber optic clamping rod 330 away from the clamping end 331. A clamping spring 340 is mounted on the fiber optic clamping rod 330, and a clamping flange 333 is also provided on the fiber optic clamping rod 330. One end of the clamping spring 340 abuts against the clamping flange 333, and the other end of the clamping spring 340 abuts against the clamping cover plate 350. The clamping cover plate 350 is located between the fiber optic clamping hole 160 and the clamping handle 332, and is fixedly connected to the clamp body 100. A through hole is provided in the middle of the clamping cover plate 350 for the fiber optic clamping rod 330 to pass through.

[0043] During use, when it is necessary to remove the fiber optic connector 400, first pull the clamping handle 332 in a direction away from the clamp body 100. At this time, the clamping end 331 changes from a state of contact with the fiber optic connector 400 to a state of discontinuation from the fiber optic connector 400. During this process, the clamping spring 340 is in a state of gradual compression. After the fiber optic connector 400 disengages from the fiber optic clamping rod 330, the assembly of the fiber optic connector 400 and the fiber optic cable 500 can be removed from the clamp body 100. Since the clamping spring 340 is still in a compressed state, the clamping spring 340 exerts a pushing force on the clamping flange 333 and the clamping cover plate 350. After releasing the pull on the clamping handle 332, under the pushing action of the clamping spring 340, the fiber optic clamping rod 330 will move away from the fiber optic clamping hole 160. When the clamping handle 332 contacts the clamping cover plate 350, the fiber optic clamping rod 330 stops moving. If it is necessary to install the combination of fiber optic connector 400 and fiber optic 500 onto the fixture body 100, first pull the clamping handle 332, place the fiber optic connector 400 between the clamping end 331 and the fixture body 100, and then release the clamping handle 332. The clamping end 331 will continue to maintain contact with the fiber optic connector 400 and apply a certain pressure to the fiber optic connector 400 under the push of the clamping spring 340, so that the combination of fiber optic connector 400 and fiber optic 500 can be stably clamped during the testing process.

[0044] In some embodiments, the clamping cover 350 is fixedly connected to the clamp body 100 by screws. This design facilitates the installation and / or replacement of the fiber optic clamping rod 330 and the clamping spring 340.

[0045] To better clamp the assembly of the fiber optic connector 400 and the fiber optic cable 500, this invention also incorporates a rotating arm, which is L-shaped. The vertical portion 311 of the rotating arm, near the clamping handle 332, is fixedly connected to the rotating shaft 320. The horizontal portion 312, perpendicular to the vertical portion 311, has an upper fiber clamping block 370 on its side near the fiber clamping groove 150. A rotating arm screw hole 314 is provided on the horizontal portion 312, and the upper fiber clamping block 370 has a first upper clamping block hole 371. An upper clamping block screw 373 is screwed into the rotating arm screw hole 314, and the upper clamping block screw 373 extends into the first upper clamping block hole 371. Furthermore, two spring fixing holes 313 are provided on the horizontal part 312. An upper spring rod 374 is installed in the spring fixing hole 313, and an upper clamping block spring 375 is sleeved on the upper spring rod 374. The spring fixing hole 313 is fixedly connected to the upper clamping block spring 375. Two upper clamping block second holes 372 are provided on the side of the optical fiber upper clamping block 370 near the horizontal part 312. The upper clamping block spring 375 extends into the upper clamping block second holes 372. The upper clamping block spring 375 is fixedly connected to the upper clamping block second holes 372 and is in a stretched state.

[0046] It should be noted that a clamping rod receiving groove 376 is provided on the side of the clamping block 370 on the optical fiber that is away from the horizontal part 312. The inner diameter of the clamping rod receiving groove 376 is larger than the outer diameter of the optical fiber clamping rod 330 in the body groove 210.

[0047] After the rotating arm is pulled, it can rotate within a certain range around the rotation axis 320. After the assembly of the fiber optic connector 400 and the fiber optic cable 500 is installed onto the fixture body 100, rotating the upper clamping block screw 373 causes it to rotate toward the fixture body 100. At this time, the upper clamping block screw 373 also pushes the upper clamping block 370 toward the fiber optic connector 400. When the upper clamping block 370 contacts the fiber optic connector 400, rotating the upper clamping block screw 373 further increases the pressure of the upper clamping block 370 on the fiber optic connector 400, thereby further clamping the fiber optic connector 400. The design of the clamping rod receiving groove 376 allows the fiber optic clamping block 370 to clamp more types of fiber optic connectors 400. When some fiber optic connectors 400 are installed on the clamp body 100, the highest point of the connector 400 is lower than the highest point of the fiber optic clamping rod 330. If the clamping rod receiving groove 376 is not provided in this case, the clamping block 370 will be unable to clamp the fiber optic connector 400 due to the obstruction of the fiber optic clamping rod 330, thus failing to achieve the purpose of further clamping the fiber optic connector 400. When the clamping rod receiving groove 376 with an inner diameter larger than the diameter of the fiber optic clamping rod 330 in the body groove 210 is designed, the clamping block 370 can pass through the fiber optic clamping rod 330 to clamp the fiber optic connector 400. When it is necessary to release the clamping force of the upper clamping block 370 on the fiber optic connector 400, the upper clamping block screw 373 is rotated. Because the upper clamping block spring 375 is always in a stretched state, it maintains a pressure on the upper clamping block 370 towards the horizontal part 312. As the upper clamping block screw 373 gradually moves away from the fiber optic connector 400, the upper clamping block 370, under the tension of the upper clamping block spring 375, also gradually moves away from the fiber optic connector 400, thus releasing the clamping force of the upper clamping block 370 on the fiber optic connector 400. The design of the upper spring rod 374 prevents the upper clamping block 370 from rotating during the rotation of the upper clamping block screw 373.

[0048] Understandably, a limiting block 380 is also provided on the side of the horizontal part 312 facing the clamp body 100, and a limiting groove 180 is provided on the clamp body 100. The limiting groove 180 is used to accommodate the limiting block 380 to limit the rotation arm. This design ensures that when the rotation arm is pulled open and then the horizontal part is brought close to the clamp body 100 for closing, the closing position is basically the same each time, avoiding the positional deviation between the horizontal part 312 and the clamp body 100, which would affect the subsequent clamping of the clamping block 370 on the optical fiber.

[0049] The fixture base 200 is provided with several base fixing holes 280, which are used to fix the fixture base 200. The design of the base fixing holes 280 allows the fixture for the fiber optic end face inspection instrument to be installed on other fixtures or platforms, making the fixture more widely applicable.

[0050] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A fixture for an optical fiber end-face inspection instrument, characterized in that, It includes a clamp base (200) and a clamp body (100). The clamp base (200) is U-shaped and has a body groove (210) in the middle. The body groove (210) is used to accommodate the clamp body (100). A knob screw hole (220) is provided on one side of the fixture base (200). A knob assembly (230) is screwed to the knob screw hole (220). The knob assembly (230) includes a knob handle (231) and a knob screw (232). The knob handle (231) and the knob screw (232) are fixedly connected. The knob screw (232) is screwed to the knob screw hole (220). The knob screw (232) passes through one side of the fixture base (200) and enters the body groove (210). The clamp body (100) is provided with a first body clamping hole (110) on the side near the knob screw hole (220), and the first body clamping hole (110) is used to accommodate the knob screw (232) entering the body groove (210); The other side of the clamp base (200) is provided with a base clamping hole (240), which communicates with the body groove (210). A base clamping rod (250) is fixedly connected to the base clamping hole (240), and a base spring (260) is sleeved on the base clamping rod (250). The outer diameter of the base spring (260) is larger than the inner diameter of the base clamping hole (240). A second body clamping hole (120) is provided on the other side of the first body clamping hole (110). The inner diameter of the second body clamping hole (120) is larger than the outer diameter of the base spring (260). A third body clamping hole (130) is provided at the end of the second body clamping hole (120) near the first body clamping hole (110). The inner diameter of the third body clamping hole (130) is smaller than the outer diameter of the base spring (260) and larger than the diameter of the base clamping rod (250). The base spring (260) abuts against the junction of the second body clamping hole (120) and the third body clamping hole (130). One end of the base clamping rod (250) passes through the second body clamping hole (120) and is inserted into the third body clamping hole (130). An angle marking section (270) is provided on one side of the clamp base (200), and an angle indicator line (170) is provided on the clamp body (100) near the angle marking section (270). The angle marking section (270) and the angle indicator line (170) are used to display the tilt angle of the clamp body (100). The fixture body (100) is also rotatably connected to an optical fiber clamping assembly.

2. The fixture for the fiber optic end-face inspection instrument according to claim 1, characterized in that, The clamp body (100) near the second body clamping hole (120) is provided with a rotating through hole (140). The fiber clamping assembly includes a rotating arm. The rotating through hole (140) is used for the clamp body (100) to be rotatably connected to the rotating arm. A rotating shaft (320) is provided in the rotating arm and the rotating through hole (140). The two ends of the rotating arm and the rotating shaft (320) are fixedly connected. The rotating shaft (320) passes through the rotating through hole (140).

3. The fixture for the fiber optic end-face inspection instrument according to claim 2, characterized in that, The clamp body (100) is provided with an optical fiber clamping groove (150) in the middle, which is used to place the optical fiber to be tested; The fiber clamping groove (150) has a fiber clamping hole (160) on one side of its inner wall. A fiber optic clamping rod (330) is inserted through the fiber optic clamping hole (160). The clamping end (331) of the fiber optic clamping rod (330) is disposed in the fiber optic clamping groove (150). The clamping end (331) is used to clamp the fiber optic connector (400). A clamping handle (332) is fixedly connected to the end of the fiber optic clamping rod (330) away from the clamping end (331). A clamping spring (340) is provided on the optical fiber clamping rod (330), and a clamping flange (333) is also provided on the optical fiber clamping rod (330). One end of the clamping spring (340) abuts against the clamping flange (333), and the other end of the clamping spring (340) abuts against the clamping cover plate (350). The clamping cover plate (350) is located between the optical fiber clamping hole (160) and the clamping handle (332). The clamping cover plate (350) is fixedly connected to the clamp body (100). A through hole is provided in the middle of the clamping cover plate (350), and the through hole is used for the optical fiber clamping rod (330) to pass through.

4. The fixture for the fiber optic end-face inspection instrument according to claim 3, characterized in that, The clamping cover plate (350) is fixedly connected to the clamp body (100) by screws.

5. The fixture for the fiber optic end-face inspection instrument according to claim 3, characterized in that, The rotating arm is L-shaped, and the part of the rotating arm closest to the clamping handle (332) is a vertical part (311), which is fixedly connected to the rotating shaft (320); The portion of the rotating arm that is perpendicular to the vertical portion (311) is the horizontal portion (312), and an optical fiber clamping block (370) is provided on the side of the horizontal portion (312) near the optical fiber clamping groove (150).

6. The fixture for the fiber optic end-face inspection instrument according to claim 5, characterized in that, The horizontal part (312) is provided with a rotating arm screw hole (314), and the optical fiber clamping block (370) is provided with an upper clamping block first hole (371). An upper clamping block screw (373) is rotatably connected in the rotating arm screw hole (314), and the upper clamping block screw (373) extends into the upper clamping block first hole (371).

7. The fixture for the fiber optic end-face inspection instrument according to claim 6, characterized in that, The horizontal part (312) is also provided with two spring fixing holes (313). An upper spring rod (374) is provided in the spring fixing hole (313). An upper clamping block spring (375) is sleeved on the upper spring rod (374). The spring fixing hole (313) is fixedly connected to the upper clamping block spring (375). The optical fiber upper clamping block (370) is provided with two upper clamping block second holes (372) on the side near the horizontal part (312). The upper clamping block spring (375) extends into the upper clamping block second hole (372). The upper clamping block spring (375) is fixedly connected to the upper clamping block second hole (372). The upper clamping block spring (375) is in a stretched state.

8. The fixture for the fiber optic end-face inspection instrument according to claim 7, characterized in that, The side of the fiber clamping block (370) away from the horizontal part (312) is provided with a clamping rod receiving groove (376), and the inner diameter of the clamping rod receiving groove (376) is larger than the diameter of the fiber clamping rod (330) in the body groove (210).

9. The fixture for the fiber optic end-face inspection instrument according to claim 8, characterized in that, The horizontal part (312) facing the clamp body (100) is also provided with a limiting block (380), and the clamp body (100) is provided with a limiting groove (180), which is used to accommodate the limiting block (380) to limit the rotating arm.

10. The fixture for the fiber optic end-face inspection instrument according to any one of claims 1 to 9, characterized in that, The clamp base (200) is provided with a plurality of base fixing holes (280), which are used to fix the clamp base (200).

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