Ultrasonic fiber optic cutting knife

Abstract

The present invention discloses an ultrasonic fiber cleaver, comprising a cutting device body, the cutting device body including a first fiber clamping mechanism, a second fiber clamping mechanism, a cutting mechanism, and a propulsion mechanism; the cutting mechanism is mounted on the top surface of the cutting device body and includes an ultrasonic generator and a diamond blade; the first fiber clamping mechanism is disposed on the left rear side of the cutting mechanism and is fixedly connected to the cutting device body, and is used to clamp and fix the optical fiber to be cut; the second fiber clamping mechanism is disposed on the right rear side of the cutting mechanism and is connected to the propulsion mechanism, and is used to clamp and fix the end of the optical fiber to be cut; the second fiber clamping mechanism is detachably mounted on the propulsion mechanism, and the propulsion mechanism is used to drive the second fiber clamping mechanism to move toward or away from the optical fiber to be cut along the length direction of the optical fiber to be cut. The present invention not only facilitates clamping and fixing the optical fiber to be cut, but also has high stability and facilitates cutting.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber cutters, and in particular to an ultrasonic optical fiber cutter. Background Art

[0002] With the development and application of fiber-optic gyroscopes (FOGs) and the advent of 6G networks, especially the development of small-sized FOGs and the future construction of 6G networks, the demand for optical fiber diameters to be as fine as possible (to reduce space and weight) has increased. Currently, ultrafine optical fibers (fiber diameters of 35um-60um) have been developed. However, processing ultrafine fibers, especially cutting them, has always been a problem and bottleneck that has plagued engineering technicians, and there has been a lack of effective cutting tools and equipment. Furthermore, some high-end optical passive components are currently requiring increasingly smaller sizes, requiring ever-shorter fiber cut lengths and increasingly stringent cutting angle quality requirements (the smaller the cut end face angle, the better). This new practical ultrasonic fiber cleaver can cut a minimum fiber length (from the cut end face to the coating end face) of 2mm and is capable of cutting quartz optical fibers with cladding diameters of 40um-250um. It has a wide range of applications, achieves a small cut end face angle (generally less than 0.3 degrees), and has a relatively high success rate, thereby minimizing fiber splicing losses and improving the yield rate of optical passive components.

[0003] Currently, the traditional fiber optic cutters on the market are all mechanical pressure-cutting type. They use four upper and lower rubber pressure pads to press the two ends of the stripped fiber part, and then use a circular metal blade in the middle to cut the fiber. This structure cannot guarantee the cutting angle for thin-diameter optical fibers with a cladding diameter of 50um-80um, and the success rate is relatively low. It cannot cut ultra-fine optical fibers with a diameter of 35um-50um, and there are certain restrictions on the cutting length (the distance from the cutting end face to the coating end face cannot be less than 6mm, because this traditional mechanical structure cutter cannot have a protective layer on the pressure pad). Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose an ultrasonic fiber cleaver. The present invention adopts the following technical solutions:

[0005] An ultrasonic fiber cleaver comprises a cutting device body, a first fiber clamping mechanism, a second fiber clamping mechanism, a cutting mechanism and a propulsion mechanism;

[0006] The cutting mechanism is mounted on the top surface of the cutting device body, and the cutting mechanism includes an ultrasonic generator and a diamond blade. The first optical fiber clamping mechanism is arranged on the left side of the rear of the cutting mechanism and is fixedly connected to the cutting device body, and is used to clamp and fix the optical fiber to be cut. The second optical fiber clamping mechanism is arranged on the right side of the rear of the cutting mechanism and is connected to the propulsion mechanism, and is used to clamp and fix the end of the optical fiber to be cut. The second optical fiber clamping mechanism is detachably mounted on the propulsion mechanism, and the propulsion mechanism is used to drive the second optical fiber clamping mechanism to move toward or away from each other along the length direction of the optical fiber to be cut.

[0007] Preferably, the diamond blade is arranged at the output end of an ultrasonic generator, and the ultrasonic generator is connected to a circuit control board, and the circuit control board is used to drive the ultrasonic generator to drive the diamond blade to vibrate up and down to cut the optical fiber to be cut.

[0008] Preferably, the first optical fiber clamping mechanism includes a first placement platform and a connecting rod, the first placement platform is fixedly connected to the top surface of the cutting device body, a first lower pressure cover plate is provided above the first placement platform, a linkage mechanism is provided between the first lower pressure cover plate and the first placement platform and is connected through the linkage mechanism, the linkage mechanism is used to apply downward pressure to the first lower pressure cover plate when the first lower pressure cover plate and the first placement platform are in a pressed state, the linkage mechanism includes a pressing rod, the pressing rod is movably hinged to the first placement platform, the middle of the pressing rod is connected to the first lower pressure cover plate through a connecting rod, one end of the connecting rod is movably hinged to the pressing rod, and the other end of the connecting rod is connected to the first lower pressure cover plate;

[0009] A clamp is installed on the first placement platform, and the clamp includes a clamp base plate and a clamp cover plate. The clamp base plate and the clamp cover plate cooperate to clamp the optical fiber to be cut. An elastic pressure block is provided on the first lower pressure cover plate. When the pressing rod is pressed, the first lower pressure cover plate and the first placement platform are engaged, and the elastic pressure block tightly presses the clamp.

[0010] Preferably, when the first lower pressing cover plate and the first placement platform are in a pressed state, the connecting rod and the pressing rod are parallel to each other, and the angle between the pressing rod and the first placement platform is less than ninety degrees.

[0011] Preferably, the second optical fiber clamping mechanism includes a second placement platform and a second lower pressing cover plate, the second placement platform is connected to the propulsion mechanism, the second lower pressing cover plate is movably hinged to one end of the second placement platform, and a connecting mechanism is provided between the second lower pressing cover plate and the second placement platform, the connecting mechanism being used to apply downward pressure to the second lower pressing cover plate when the second lower pressing cover plate and the second placement platform are in a pressed state;

[0012] The connecting mechanism includes a lower pressure rod and an elastic connecting rod, the lower pressure rod is movably hinged to the second placement platform, the middle of the lower pressure rod is connected to the second lower pressure cover plate by an elastic connecting rod, and the two ends of the elastic connecting rod are movably hinged to the lower pressure rod and the second lower pressure cover plate respectively, when the second lower pressure cover plate and the second placement platform are in a pressed state, the elastic connecting rod and the lower pressure rod are parallel to each other, and the angle between the lower pressure rod and the second placement platform is less than ninety degrees;

[0013] An optical fiber positioning seat is fixedly installed on the second placement platform, and an optical fiber positioning groove is provided on the optical fiber positioning seat. The head of the optical fiber to be cut is positioned in the optical fiber positioning groove. A pressure block matching the optical fiber positioning groove is provided on the second lower pressure cover plate, which is used to fix the head of the optical fiber to be cut. When the lower pressure rod is pressed, the second lower pressure cover plate engages with the second placement platform, and the pressure block tightly presses the optical fiber to be cut in the optical fiber positioning groove.

[0014] Preferably, the propulsion mechanism includes a slider and a cam, the slider is slidably arranged inside the cutting device body, the second placement platform is detachably mounted on the top surface of the slider, the left side of the slider is fixedly connected to the thrust spring, and the right side is movably connected to the cam, the cam action surface is always in contact with the right side of the slider, the cam pushes the slider to move leftward and compresses the spring, and the propulsion mechanism also includes a propulsion knob, and the cam is movably connected to the cutting device body via the propulsion knob;

[0015] The propulsion mechanism also includes a thrust spring, one end of which is fixedly connected to the slider, and the other end of which is connected to a thrust adjustment knob. By adjusting the length of the thrust spring with the adjustment knob, the thrust force can be varied to meet the requirements for cutting optical fibers of different diameters. The thrust adjustment knob is installed throughout the cutting device body. When the propulsion knob is rotated clockwise, the slider, driven by the thrust spring, drives the second optical fiber clamping mechanism to the right. When the propulsion knob is rotated counterclockwise, the cam pushes the slider to the left and compresses the thrust spring, causing the slider to return the second optical fiber clamping mechanism to its original position.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention facilitates not only the clamping and fixing of the optical fiber to be cut, but also the cutting operation of the optical fiber to be cut, through the coordinated arrangement of the first optical fiber clamping mechanism, the second optical fiber clamping mechanism, the cutting mechanism, and the pushing mechanism. At the same time, the device is simple to operate and is conducive to promotion.

[0018] 2. The present invention facilitates the clamping and fixing of the end of the optical fiber to be cut with a protective layer and the end without a protective layer respectively through the coordinated arrangement of the first optical fiber clamping mechanism, the linkage mechanism, the second optical fiber clamping mechanism and the connecting mechanism. The operation is simple, and the two ends of the optical fiber to be cut can be stably clamped, which is beneficial for the subsequent cutting operation of the optical fiber to be cut.

[0019] 3. The present invention facilitates the adjustment of the second optical fiber clamping mechanism by setting the propulsion mechanism, facilitates the tension control of optical fibers of different diameters, and further facilitates the subsequent cutting thereof, while also helping to increase the applicable range of the optical fiber cutting knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the cutting device body of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the cutting device body of the present invention;

[0023] Figure 3 Schematic diagram of the three-dimensional structure of the first optical fiber clamping mechanism of the present invention;

[0024] Figure 4 is a three-dimensional rear view schematic diagram of the first optical fiber clamping mechanism of the present invention;

[0025] Figure 5 is a schematic diagram of the three-dimensional structure of the second optical fiber clamping mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the propulsion mechanism of the present invention;

[0027] Figure 7 This is a schematic diagram of the connection between the fixture base plate and the fixture cover plate of the present invention;

[0028] Figure 8 This is a connection diagram of the cutting mechanism of the present invention;

[0029] Serial numbers in the figure: 1. Cutting device body; 2. First optical fiber clamping mechanism; 3. Second optical fiber clamping mechanism; 4. Cutting mechanism; 41. Ultrasonic generator; 42. Diamond blade; 5. Propelling mechanism; 51. Slider; 52. Cam; 53. Propelling knob; 54. Thrust spring; 55. Thrust adjustment knob; 6. Clamp; 61. Clamp base plate; 62. Clamp cover; 7. Optical fiber positioning seat; 71. Optical fiber positioning groove; 11. Optical fiber to be cut; 21. First lower pressure cover; 2101. Elastic pressure block; 22. First placement platform; 23. Linkage mechanism; 2301. Pressing rod; 2302. Connecting rod; 31. Second lower pressure cover; 3101. Pressure block; 32. Second placement platform; 33. Connecting mechanism; 3301. Lower pressure rod; 3302. Elastic connecting rod. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Example 1

[0032] like Figure 1-8 As shown, an ultrasonic fiber cleaver includes a cleaver body 1, which includes a first fiber clamping mechanism 2, a second fiber clamping mechanism 3, a cutting mechanism 4, and a propulsion mechanism 5. The cutting mechanism 4 is mounted on the top surface of the cleaver body 1 and includes an ultrasonic generator 41 and a diamond blade 42. The diamond blade 42 is located at the output end of the ultrasonic generator 41. The ultrasonic generator 41 is connected to a circuit control board, which drives the ultrasonic generator 41 to vibrate the diamond blade 42 up and down to cut the optical fiber 11 to be cut. The first fiber clamping mechanism 2 is located on the left side of the rear of the cleaver body 4 and is fixedly connected to the cleaver body 1. It is used to clamp and secure the optical fiber 11 to be cut. The second fiber clamping mechanism 3 is located on the right side of the rear of the cleaver body 4 and is connected to the propulsion mechanism 5. It is used to clamp and secure the end of the optical fiber 11 to be cut. The second fiber clamping mechanism 3 is detachably mounted on the propulsion mechanism 5. The propulsion mechanism 5 is used to drive the second fiber clamping mechanism 3 to move toward or away from the longitudinal direction of the optical fiber 11 to be cut. The cutting device body 1 is equipped with a first optical fiber clamping mechanism 2, a second optical fiber clamping mechanism 3, a cutting mechanism 4 and a pushing mechanism 5, which not only facilitates the clamping and fixing of the optical fiber to be cut, but also meets the requirements of cutting optical fibers of different diameters. At the same time, the ultrasonic optical fiber cutting knife is easy to operate, filling a gap at home and abroad.

[0033] Example 2

[0034] like Figure 1-8As shown, when other parts are the same as those in Example 1, the difference between this embodiment and Example 1 is:

[0035] The first optical fiber clamping mechanism 2 includes a first placement platform 22 and a connecting rod 2302. The first placement platform 22 is fixedly connected to the top surface of the cutting device body 1. A first lower pressing cover plate 21 is provided above the first placement platform 22. A linkage mechanism 23 is provided between the first lower pressing cover plate 21 and the first placement platform 22 and is connected through the linkage mechanism 23. The linkage mechanism 23 is used to apply downward pressure to the first lower pressing cover plate 21 when the first lower pressing cover plate 21 and the first placement platform 22 are in a pressed state. The linkage mechanism 23 includes a pressing rod 2301. The pressing rod 2301 is movably hinged to the first placement platform 22. The middle of the pressing rod 2301 is connected to the first lower pressing cover plate 21 through a connecting rod 2302. One end of the connecting rod 2302 is movably hinged to the pressing rod 2301, and the other end of the connecting rod 2302 is connected to the first lower pressing cover plate 21;

[0036] A clamp 6 is mounted on the first placement platform 22. The clamp 6 comprises a clamp base 61 and a clamp cover 62. The clamp base 61 and the clamp cover 62 cooperate to clamp the optical fiber 11 to be cleaved. An elastic pressure block 2101 is provided on the first lower pressing cover 21. When the pressing rod 2301 is pressed, the first lower pressing cover 21 and the first placement platform 22 engage, and the elastic pressure block 2101 firmly presses the clamp 6. When the first lower pressing cover 21 and the first placement platform 22 are in the pressed state, the connecting rod 2302 and the pressing rod 2301 are parallel to each other, and the angle between the pressing rod 2301 and the first placement platform 22 is less than 90 degrees.

[0037] The second optical fiber clamping mechanism 3 includes a second placement platform 32 and a second lower pressing cover plate 31. The second placement platform 32 is connected to the propulsion mechanism 5. The second lower pressing cover plate 31 is movably hinged to one end of the second placement platform 32. A connecting mechanism 33 is provided between the second lower pressing cover plate 31 and the second placement platform 32. The connecting mechanism 33 is used to apply downward pressure to the second lower pressing cover plate 31 when the second lower pressing cover plate 31 and the second placement platform 32 are in a pressed state.

[0038] The connecting mechanism 33 includes a lower pressure rod 3301 and an elastic connecting rod 3302. The lower pressure rod 3301 is movably hinged to the second placement platform 32. The middle of the lower pressure rod 3301 is connected to the second lower pressure cover plate 31 via the elastic connecting rod 3302, and the two ends of the elastic connecting rod 3302 are movably hinged to the lower pressure rod 3301 and the second lower pressure cover plate 31 respectively. When the second lower pressure cover plate 31 and the second placement platform 32 are in a pressed state, the elastic connecting rod 3302 and the lower pressure rod 3301 are parallel to each other, and the angle between the lower pressure rod 3301 and the second placement platform 32 is less than 90 degrees.

[0039] An optical fiber positioning seat 7 is fixedly installed on the second placement platform 32, and an optical fiber positioning groove 71 is provided on the optical fiber positioning seat 7. The head of the optical fiber 11 to be cut is positioned in the optical fiber positioning groove 71, and a pressing block 3101 matching the optical fiber positioning groove 71 is provided on the second lower pressing cover plate 31, which is used to fix the head of the optical fiber 11 to be cut. When the lower pressing rod 3301 is pressed, the second lower pressing cover plate 31 is engaged with the second placement platform 32, and the pressing block 3101 tightly presses the optical fiber 11 to be cut in the optical fiber positioning groove 71.

[0040] The present invention first presses the optical fiber to be cut 11 with a protective layer through the clamp bottom plate 61 and the clamp cover plate 62, and by pressing the pressing rod 2301 downward, the first lower pressing cover plate 21 and the first placement platform 22 are engaged, and the elastic pressing block 2101 tightly presses the clamp 6, so as to press the end of the optical fiber to be cut 11 with a protective layer. At the same time, under the cooperation of the first lower pressing cover plate 21 and the linkage mechanism 23, the linkage mechanism 23 is used to apply downward pressure to the first lower pressing cover plate 21 when the first lower pressing cover plate 21 and the first placement platform 22 are in a pressed state, so that the first lower pressing cover plate 21 cooperates with the clamp 6 to press the first lower pressing cover plate 21. The end of the optical fiber 11 to be cut with the protective layer is pressed, and then the lower pressing rod 3301 is pressed down, so that the second lower pressing cover plate 31 and the second placement platform 32 are in a pressed state, so that the pressing block 3101 tightly presses the head of the optical fiber 11 to be cut in the optical fiber positioning groove 71. At the same time, under the cooperation setting of the second lower pressing cover plate 31 and the connecting mechanism 33, the connecting mechanism 33 is used to apply downward pressure to the second lower pressing cover plate 31 when the second lower pressing cover plate 31 and the second placement platform 32 are in a pressed state, so that the second lower pressing cover plate 31 cooperates with the optical fiber positioning seat 7 to clamp and fix the head of the optical fiber 11 to be cut.

[0041] Example 3

[0042] like Figure 1-8 As shown, when other parts are the same as those in Example 2, the difference between this embodiment and Example 2 is:

[0043] The propulsion mechanism 5 includes a slider 51 and a cam 52. The slider 51 is slidably disposed inside the cutting device body 1. The second placement platform 32 is detachably mounted on the top surface of the slider 51. The working surface of the cam 52 acts on the left side of the slider 51. The propulsion mechanism 5 also includes a propulsion knob 53. The cam 52 is movably connected to the cutting device body 1 via the propulsion knob 53.

[0044] The propulsion mechanism 5 also includes a thrust spring 54, one end of the thrust spring 54 is connected to the slider 51, and the other end of the thrust spring 54 is connected to the thrust adjustment knob 55. The thrust adjustment knob 55 is installed on the cutting device body 1. When the propulsion knob 53 is rotated clockwise, the slider 51 drives the second optical fiber clamping mechanism 3 to move to the right under the push of the thrust spring 54. When the knob 53 is rotated counterclockwise, the cam 52 pushes the slider 51 to move to the left and compresses the thrust spring 54. The slider 51 drives the second optical fiber clamping mechanism 3 to return to its original position.

[0045] Through the setting of the propulsion mechanism 5, when the propulsion knob 53 is rotated clockwise, the slider 51 drives the second optical fiber clamping mechanism 3 to move to the right under the push of the thrust spring 54. When the propulsion knob 53 is rotated counterclockwise, the cam 52 pushes the slider 51 to move to the left and compresses the thrust spring 54. The slider 51 drives the second optical fiber clamping mechanism 3 to return to its original position, which is convenient for clamping and fixing the optical fiber, and then facilitates the subsequent cutting operation.

[0046] Specifically, the working principle and operation method of the present invention are as follows:

[0047] Step 1: Rotate the push knob 53 counterclockwise to make the cam 52 push the slider 51 and move the second fiber clamping mechanism 3 to the left, so that the second fiber clamping mechanism 3 returns to its original position.

[0048] Step 2: Remove the protective layer from one end of the optical fiber 11 to be cut, wipe it with alcohol, and clamp the end of the optical fiber 11 to be cut with the protective layer by the clamp 6;

[0049] Step 3: By pressing the pressing rod 2301 downward, the first lower pressing cover plate 21 and the first placement platform 22 are engaged, and the elastic pressing block 2101 tightly presses the clamp 6. The linkage mechanism 23 is used to apply downward pressure to the first lower pressing cover plate 21 when the first lower pressing cover plate 21 and the first placement platform 22 are in the pressed state, so as to facilitate pressing the end of the optical fiber 11 to be cut with the protective layer;

[0050] Step 4: By pressing down the pressing rod 3301, the second lower pressing cover plate 31 and the second placement platform 32 are in a pressed state, so that the pressing block 3101 tightly presses the head of the optical fiber 11 to be cut in the optical fiber positioning groove 71. The connecting mechanism 33 is used to apply downward pressure to the second lower pressing cover plate 31 when the second lower pressing cover plate 31 and the second placement platform 32 are in the pressed state, so that the second lower pressing cover plate 31 cooperates with the optical fiber positioning seat 7 to clamp and fix the head of the optical fiber 11 to be cut;

[0051] Step 5: Rotate the push knob 53 clockwise to release the force of the cam 52 on the slider 51. The push spring 54 pushes the slider 51 and the second fiber clamping mechanism 3 to the right, tightening the fiber and preparing it for cutting.

[0052] Step six: driving the ultrasonic generator 41 to drive the diamond blade 42 to vibrate up and down to cut the optical fiber 11 to be cut, thereby completing the optical fiber cutting.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An ultrasonic fiber cleaver, comprising a cutting device body (1), characterized in that: The cutting device body (1) comprises a first optical fiber clamping mechanism (2), a second optical fiber clamping mechanism (3), a cutting mechanism (4) and a propulsion mechanism (5); The cutting mechanism (4) is mounted on the top surface of the cutting device body (1), and the cutting mechanism (4) includes an ultrasonic generator (41) and a diamond blade (42); the first optical fiber clamping mechanism (2) is arranged on the left side behind the cutting mechanism (4) and is fixedly connected to the cutting device body (1), and is used to clamp and fix the optical fiber to be cut (11); the second optical fiber clamping mechanism (3) is arranged on the right side behind the cutting mechanism (4) and is connected to the propulsion mechanism (5), and is used to clamp and fix the end of the optical fiber to be cut (11); the second optical fiber clamping mechanism (3) is detachably mounted on the propulsion mechanism (5), and the propulsion mechanism (5) is used to drive the second optical fiber clamping mechanism (3) to move toward or away from the optical fiber to be cut (11) along the length direction; The first optical fiber clamping mechanism (2) comprises a first placement platform (22) and a connecting rod (2302). The first placement platform (22) is fixedly connected to the top surface of the cutting device body (1). A first lower pressing cover plate (21) is provided above the first placement platform (22). A linkage mechanism (23) is provided between the first lower pressing cover plate (21) and the first placement platform (22) and is connected via the linkage mechanism (23). The linkage mechanism (23) is used for connecting the first lower pressing cover plate (21) and the first placement platform (22). 22) is in a pressed state, downward pressure is applied to the first lower pressing cover plate (21), the linkage mechanism (23) includes a pressing rod (2301), the pressing rod (2301) is movably hinged to the first placement platform (22), the middle of the pressing rod (2301) is connected to the first lower pressing cover plate (21) through a connecting rod (2302), one end of the connecting rod (2302) is movably hinged to the pressing rod (2301), and the other end of the connecting rod (2302) is connected to the first lower pressing cover plate (21); A clamp (6) is installed on the first placement platform (22), and the clamp (6) includes a clamp base plate (61) and a clamp cover plate (62). The clamp base plate (61) and the clamp cover plate (62) cooperate to clamp the optical fiber (11) to be cut. An elastic pressure block (2101) is provided on the first lower pressure cover plate (21). When the pressing rod (2301) is pressed, the first lower pressure cover plate (21) and the first placement platform (22) are engaged, and the elastic pressure block (2101) tightly presses the clamp (6); The second optical fiber clamping mechanism (3) comprises a second placement platform (32) and a second lower pressing cover plate (31); the second placement platform (32) is connected to the propulsion mechanism (5); the second lower pressing cover plate (31) is movably hinged to one end of the second placement platform (32); a connecting mechanism (33) is provided between the second lower pressing cover plate (31) and the second placement platform (32); the connecting mechanism (33) is used to apply downward pressure to the second lower pressing cover plate (31) when the second lower pressing cover plate (31) and the second placement platform (32) are in a pressed state; The connecting mechanism (33) includes a lower pressure rod (3301) and an elastic connecting rod (3302), the lower pressure rod (3301) is movably hinged with the second placement platform (32), the middle of the lower pressure rod (3301) is connected to the second lower pressure cover plate (31) through the elastic connecting rod (3302), and the two ends of the elastic connecting rod (3302) are movably hinged with the lower pressure rod (3301) and the second lower pressure cover plate (31), respectively. When the second lower pressure cover plate (31) and the second placement platform (32) are in a pressed state, the elastic connecting rod (3302) and the lower pressure rod (3301) are parallel to each other, and the angle between the lower pressure rod (3301) and the second placement platform (32) is less than ninety degrees; An optical fiber positioning seat (7) is fixedly mounted on the second placement platform (32), and an optical fiber positioning groove (71) is provided on the optical fiber positioning seat (7). The head of the optical fiber (11) to be cut is positioned in the optical fiber positioning groove (71). A pressing block (3101) matching the optical fiber positioning groove (71) is provided on the second lower pressing cover plate (31), and the pressing block (3101) is made of rubber material and is used to fix the head of the optical fiber (11) to be cut. When the lower pressing rod (3301) is pressed, the second lower pressing cover plate (31) engages with the second placement platform (32), and the pressing block (3101) tightly presses the optical fiber (11) to be cut in the optical fiber positioning groove (71). The propulsion mechanism (5) includes a slider (51) and a cam (52); the slider (51) is slidably arranged inside the cutting device body (1); the second placement platform (32) is detachably mounted on the top surface of the slider (51); the cam (52) is movably mounted on the slider (51); the propulsion mechanism (5) also includes a propulsion knob (53); the cam (52) is movably connected to the cutting device body (1) via the propulsion knob (53); The propulsion mechanism (5) further comprises a thrust spring (54), one end of which is fixedly connected to the slider (51), and the other end of which is connected to a thrust adjustment knob (55), which is installed on the cutting device body (1). When the propulsion knob (53) is rotated clockwise, the slider (51) drives the second optical fiber clamping mechanism (3) to move to the right under the push of the thrust spring (54); when the propulsion knob (53) is rotated counterclockwise, the cam (52) and the slider (51) move to the left and compress the thrust spring (54), and the slider (51) drives the second optical fiber clamping mechanism (3) to return to its original position.

2. The ultrasonic fiber cleaver according to claim 1, characterized in that: The diamond blade (42) is arranged at the output end of the ultrasonic generator (41), and the ultrasonic generator (41) is connected to a circuit control board. The circuit control board is used to drive the ultrasonic generator (41) to drive the diamond blade (42) to vibrate up and down to cut the optical fiber (11) to be cut.

3. The ultrasonic fiber cleaver according to claim 1, characterized in that: When the first lower pressing cover plate (21) and the first placement platform (22) are in a pressed state, the connecting rod (2302) and the pressing rod (2301) are parallel to each other, and the angle between the pressing rod (2301) and the first placement platform (22) is less than ninety degrees.

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