A QBH fiber collimation module with a focusing function

Abstract

The present invention discloses a QBH fiber collimation module with a focusing function, comprising: a focusing collimation cylinder, which includes a fixed frame, a sliding frame slidably connected to the fixed frame, and a rotating ring. A lens is provided on the sliding frame, and second open slots are symmetrically formed on the rotating ring; a dust-proof replacement mechanism, which includes symmetric converging rings and a plugging sleeve rotatably connected to the rotating ring. A placement bin is formed on the converging ring; the two converging rings are clamped to the plugging sleeve through bolts. The QBH fiber collimation module with a focusing function provided by the present invention, when the lens needs to be replaced, moves the sliding frame to the position of the rotating ring, then slews the two converging rings on the rotating ring, and rotates the rotating ring to align the placement bin with the two second open slots. Then, the lens in the placement bin can be pushed towards the sliding frame by a rod to replace the lens in the sliding frame. The process avoids disassembling the entire focusing collimation cylinder, facilitating replacement during focusing.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber collimation, and more specifically to a QBH fiber collimation module with a focusing function. Background Art

[0002] The QBH fiber, namely high-power laser, is usually applicable to high-power laser operations such as laser cutting, welding, and marking.

[0003] After the laser is transmitted and released in the optical fiber, it will emit a Gaussian beam with a small beam waist and a large divergence angle. To meet the usage requirements, a collimating lens is added to the fiber connector to change the Gaussian beam into a Gaussian beam with a large beam waist and a small divergence angle to meet the usage requirements.

[0004] Before the laser equipment cuts, the QBH fiber collimation module needs to be focused to move the focus as needed, so as to measure the optimal cutting focal segment, and the corresponding docking head is manufactured based on the obtained data.

[0005] According to the patent number CN217543448U, the publication (announcement) date: October 4, 2022, a precisely focused QBH fiber collimation module is disclosed, which includes a QBH fiber lock head, an adjustable collimation mechanism, and a collimation module mounting seat from right to left. The adjustable collimation mechanism includes an anti-rotation connecting piece, a main sleeve, a snap ring assembly sleeved outside the main sleeve, and a collimation lens assembly located in the inner cavity of the main sleeve. The collimation lens assembly includes a cylindrical lens frame slidably mounted in the main sleeve and a collimation lens placed inside the cylindrical lens frame. The snap ring assembly includes a left snap ring and a right snap ring. The left snap ring and the right snap ring are butted to form a ring groove opening for placing the outer end of the anti-rotation connecting piece. The inner end of the anti-rotation connecting piece passes through the main sleeve and is inserted into a through hole corresponding to and matching the cylindrical lens frame. When the snap ring assembly rotates, it can push the anti-rotation connecting piece to move axially, thereby driving the collimation lens assembly to slide in the main sleeve, having the advantages of precise focusing, good focusing effect, and ingenious structural design.

[0006] In the prior art including the above patent, for the QBH fiber collimation module, the position of the focus is changed by adjusting the lens and the waist concentration segment (rear focal segment) after the refraction of the lens at the fiber output end (front focal segment). In different applications of different laser cutting devices, it is necessary to replace the lens or a combination of multiple lenses of the collimation module to select a suitable focus. However, the lens installation usually requires overall disassembly. The disassembly steps are cumbersome and dust removal is required throughout the process, prolonging the focusing time. Summary of the Invention

[0007] The purpose of the present invention is to provide a QBH fiber collimation module with a focusing function, aiming to solve the problem that the lens needs to be disassembled as a whole during the focusing process.

[0008] To achieve the above object, the present invention provides the following technical solutions: A QBH fiber collimation module with a focusing function, comprising:

[0009] A focusing collimation cylinder, which includes a fixed frame, a sliding frame slidably connected to the fixed frame, and a rotating ring. A lens is provided on the sliding frame, and second open slots are symmetrically formed on the rotating ring;

[0010] A dust-proof replacement mechanism, which includes symmetric converging rings and a plugging sleeve rotatably connected to the rotating ring. A placement bin is formed on the converging ring;

[0011] The two converging rings are clamped to the plugging sleeve through bolts, and the plugging sleeve is rotated to fixedly communicate the two placement bins with the two second open slots.

[0012] Preferably, sealing elastic plates are provided at both ends of the placement bin, and mutually extruded limiting air bags are symmetrically and rotatably connected in the placement bin. The limiting air bags extrude the lens and rotate as the lens moves

[0013] Preferably, a movable turntable is movably provided on the plugging sleeve, and the movable turntable rotates with the plugging sleeve and fits the lens on the sliding frame.

[0014] Preferably, a rotating ring is rotatably connected to the outer layer of the fixed frame, and the inner wall of the rotating ring and the outer wall of the sliding frame are in threaded transmission so that rotating the rotating ring drives the sliding frame to move along the fixed frame.

[0015] Preferably, the fixed frame includes a top ring and a bottom ring, and guide sliding columns for the sliding frame to slide are provided between the top ring and the bottom ring.

[0016] Preferably, the rotating ring includes a plurality of threaded plate pages arranged in a circumferential array. An active plate page is movably provided between every two adjacent threaded plate pages. Elastic threads are provided on both the threaded plate pages and the active plate pages. The active plate page is driven to fit the sliding frame to increase the rotational damping of the rotating ring.

[0017] Preferably, a convex strip is provided on the active plate page, and two concave docking grooves are formed on the threaded plate page. The convex strip is driven to be clamped in one of the concave docking grooves to couple or decouple the transmission of the sliding frame.

[0018] Preferably, two sliding frames are slidably connected to the fixed frame, and the two sliding frames are respectively coupled or decoupled in transmission.

[0019] Preferably, sliding grooves are symmetrically formed on the sliding frame, a sliding plate is slidably connected to the sliding grooves, and a coupling thread for coupling the elastic thread is formed on the sliding plate.

[0020] Preferably, locking mechanisms are respectively arranged at both ends of the fixing frame. The locking mechanism includes a telescopic rod. A concave slope is formed on the sliding groove. The telescopic rod is arranged on the sliding plate. The sliding plate rotates along with the telescopic rod and slides into the concave slope to be decoupled and then fits against the guide sliding column to lock.

[0021] In the above technical solution, a QBH fiber collimation module with a focusing function provided by the present invention has the following beneficial effects: when a lens needs to be replaced, the sliding frame is moved to the position of the rotating ring, and then two converging rings are sleeved on the rotating ring. The rotating ring is rotated to align the placement bin with the two second open slots. Then, the lens in the placement bin can be pushed towards the sliding frame by a rod to replace the lens in the sliding frame, avoiding the disassembly of the entire focusing collimation cylinder during the process and facilitating the replacement during focusing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the whole provided by an embodiment of the present invention;

[0024] Figure 2 It is an exploded schematic diagram of the dust-proof replacement mechanism provided by an embodiment of the present invention;

[0025] Figure 3 It is an exploded schematic diagram of the focusing collimation cylinder provided by an embodiment of the present invention;

[0026] Figure 4 It is Figure 3 the enlarged schematic diagram at position A in

[0027] Figure 5 It is an exploded schematic diagram of the fixing frame and the rotating ring provided by an embodiment of the present invention;

[0028] Figure 6 It is an exploded schematic diagram of the fixing frame and the sliding frame provided by an embodiment of the present invention;

[0029] Figure 7 It is a sectional schematic diagram of the focusing collimation cylinder and the dust-proof replacement mechanism provided by an embodiment of the present invention;

[0030] Figure 8 It is Figure 7 the enlarged schematic diagram at position B in

[0031] Figure 9 It is a sectional schematic diagram of the focusing collimation cylinder provided by an embodiment of the present invention;

[0032] Figure 10 for Figure 9 The enlarged schematic diagram at C in the middle;

[0033] Figure 11 for Figure 3 The enlarged schematic diagram at D in the middle;

[0034] Figure 12 Schematic diagram of the blocking sleeve and the push plate 4 provided in an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1. Focusing collimator; 10. Sliding frame; 101. Lens; 102. Through slot; 1021. Fixed plate; 103. First movable slot; 104. Sliding slot; 105. Concave slope; 106. Sliding plate; 1061. Coupling thread; 11. Top ring; 111. Guide column; 12. Rotating ring; 120. Second open slot; 121. Threaded plate leaf; 122. Elastic thread; 123. Concave docking slot; 13. Movable plate leaf; 131. Fixed Fixed protrusion; 132, convex strip; 14, bottom ring; 141, second movable groove; 15, output sleeve; 151, through hole; 152, optical cable docking seat; 2, dust sealing replacement mechanism; 20, blocking sleeve; 201, first open groove; 202, movable turntable; 21, retracting ring; 22, placement bin; 23, sealing spring plate; 24, limiting airbag; 241, rotating shaft; 25, bolt; 3, locking mechanism; 31, telescopic rod; 32, connecting dial ring; 4, push plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0038] like Figure 1-12 As shown, a QBH fiber collimation module with focusing function includes:

[0039] The focusing collimating cylinder 1 comprises a fixed frame, a sliding frame 10 slidably connected to the fixed frame, and a rotating ring 12, wherein a lens 101 is arranged on the sliding frame 10, and a second open groove 120 is symmetrically opened on the rotating ring 12;

[0040] The dust sealing replacement mechanism 2 comprises a symmetrical retracting ring 21 and a sealing sleeve 20 rotatably connected to the rotating ring 12, and a placement bin 22 is provided on the retracting ring 21;

[0041] Between the two closing rings 21, they are clamped on the plugging sleeve 20 through bolts 25, and the plugging sleeve 20 is rotated so that the two placement bins 22 are fixedly communicated with the two second open slots 120.

[0042] Specifically, output sleeves 15 and optical cable docking seats 152 are respectively arranged at both ends of the fixing frame. The optical cable docking seat 152 is used for docking the optical fiber head. A through slot 102 is opened on the sliding frame 10, and fixing plates 1021 are symmetrically arranged on the through slot 102 (the fixing plates 1021 are made of elastic metal and are hollow deformable structures), and the two fixing plates 1021 clamp and fix the lens 101. When replacing the lens 101, by rotating the rotating ring 12, the second open slot 120 is made to coincide with the through slot 102, and then the two closing rings 21 are connected by two bolts 25, and the closing rings 21 are sleeved on the plugging sleeve 20. The two first open slots 201 opened on the plugging sleeve 20 need to be aligned with the two placement bins 22, and then the bolts 25 are tightened for clamping and fixing. After fixing, the lens 101 to be replaced is placed in one of the placement bins 22, and the plugging sleeve 20 is rotated to make the first open slot 201 coincide with the second open slot 120. Then, with the push plate 4, it is pushed along one of the placement bins 22 to push the new lens 101 into the sliding frame 10, and the original lens 101 is pushed into the other placement bin 22 for storage. The process does not require disassembling the focusing collimator 1, and only the lens 101, the placement bin 22, the closing ring 21, and the plugging sleeve 20 need to be dusted.

[0043] In the above technical solution, when the lens 101 needs to be replaced, the sliding frame 10 is moved to the position of the rotating ring 12, and then the two closing rings 21 are sleeved on the rotating ring 12, and the rotating ring 12 is rotated to make the placement bin 22 dock with the two second open slots 120. Then, the lens 101 in the placement bin 22 can be pushed towards the sliding frame 10 by a rod to replace the lens 101 in the sliding frame 10. The process avoids disassembling the entire focusing collimator 1 and is convenient for replacement during focusing.

[0044] As an embodiment provided by the present invention, sealing elastic plates 23 are arranged at both ends of the placement bin 22, and limiting air bags 24 that are symmetrically and rotatably connected and mutually extruded are arranged in the placement bin 22. The limiting air bags 24 extrude the lens 101 and rotate as the lens 101 moves.

[0045] Specifically, the sealing elastic plate 23 mainly prevents external dust from entering the placement bin 22. The sealing elastic plate 23 includes two staggered elastic plates. When the lens 101 enters, it squeezes the staggered elastic plates to deform. At the same time, the two elastic plates fit against the two surfaces of the lens 101 to allow the lens 101 to pass through. A rotating shaft 241 is provided at the center of the limiting airbag 24. The rotating shaft 241 is rotatably connected to the placement bin 22. When the lens 101 is not inserted, the two limiting airbags 24 fit against each other to seal the placement bin 22. When the lens 101 is inserted, the lens 101 squeezes into the gap between the two limiting airbags 24 and drives the two limiting airbags 24 to rotate to assist the lens 101 to move along the placement bin 22.

[0046] Furthermore, flannelette can be provided on the sealing elastic plate 23 to sweep the dust on the lens 101.

[0047] When replacing the lens 101, by rotating the rotating ring 12, align the second open slot 120 with the through slot 102. Then connect the two converging rings 21 through two bolts 25, and sleuth the converging rings 21 on the plugging sleeve 20. Align the two first open slots 201 opened on the plugging sleeve 20 with the two placement bins 22. Subsequently, tighten the bolts 25 to clamp and fix. After fixing, place the lens 101 to be replaced in one of the placement bins 22, and rotate the plugging sleeve 20 to align the first open slot 201 with the second open slot 120. Then use the push plate 4 to push against one of the placement bins 22. At this time, the lens 101 enters the sliding frame 10 along the rotation of the two limiting airbags 24, and pushes the original lens 101 into the other placement bin 22 for storage.

[0048] As an embodiment provided by the present invention, a movable turntable 202 is movably provided on the plugging sleeve 20. The movable turntable 202 rotates with the plugging sleeve 20 and fits against the lens 101 on the sliding frame 10.

[0049] Specifically, a fitting groove for fitting the movable turntable 202 is opened on the converging ring 21. A spring is provided between the movable turntable 202 and the converging ring 21. The spring pushes the movable turntable 202 to always fit against the fitting groove. When the plugging sleeve 20 rotates, the movable turntable 202 will fit against the rotating ring 12 and be pushed out of the fitting groove to compress the spring. After the installation of the new lens 101 is completed, rotate the plugging sleeve 20 again. The spring will pull the movable turntable 202 to always fit against the fitting groove, and a part of it extends out of the fitting groove to fit against the lens 101. As the rotating ring 12 rotates, the movable turntable 202 will push against the two sides of the lens 101 located in the through slot 102 to assist in centering the lens 101.

[0050] When replacing the lens 101, by rotating the rotating ring 12, align the second open slot 120 with the through slot 102. Then connect the two converging rings 21 with two bolts 25, and sleuth the converging ring 21 on the plugging sleeve 20. Align the two first open slots 201 opened on the plugging sleeve 20 with the two placement bins 22. Subsequently, tighten the bolt 25 for clamping and fixing. After fixing, place the lens 101 to be replaced in one of the placement bins 22, and rotate the plugging sleeve 20 to align the first open slot 201 with the second open slot 120. The movable turntable 202 will fit against the rotating ring 12 and be pushed out of the fitting groove to compress the spring. Then use the push plate 4 to push against one of the placement bins 22. At this time, the lens 101 enters the sliding frame 10 along the rotation of the two limiting airbags 24, and the original lens 101 is pushed into the other placement bin 22 for storage. Subsequently, rotate the plugging sleeve 20 back to its original position, and rotate the rotating ring 12. The designed movable turntable 202 will push against both sides of the lens 101 located in the through slot 102 to assist in centering the lens 101.

[0051] As an embodiment provided by the present invention, the outer layer of the fixed frame is rotatably connected with a rotating ring 12, and the inner wall of the rotating ring 12 and the outer wall of the sliding frame 10 are in threaded transmission so that rotating the rotating ring 12 drives the sliding frame 10 to move along the fixed frame;

[0052] The fixed frame includes a top ring 11 and a bottom ring 14, and a guide slide column 111 for the sliding frame 10 to slide is arranged between the top ring 11 and the bottom ring 14.

[0053] Specifically, an output sleeve 15 is arranged on the top ring 11, an optical cable docking seat 152 is arranged on the bottom ring 14. The number of the guide slide columns 111 is two and they are symmetrically arranged. The two ends of the rotating ring 12 are respectively rotatably connected to the top ring 11 and the bottom ring 14. By rotating the rotating ring 12 and cooperating with the threaded transmission, the sliding frame 10 is driven to slide along the guide slide column 111, so as to change the position of the lens 101 and perform the zoom operation of the front focal length.

[0054] When replacing the lens 101, by rotating the rotating ring 12, the sliding frame 10 is moved to the position of the second open slot 120, and the second open slot 120 coincides with the through slot 102. Then, the two closing rings 21 are connected by two bolts 25, and the closing ring 21 is sleeved on the plugging sleeve 20. The two first open slots 201 opened on the plugging sleeve 20 are aligned with the two placement bins 22. Subsequently, the bolts 25 are tightened for clamping and fixing. After fixing, the lens 101 to be replaced is placed in one of the placement bins 22, and the plugging sleeve 20 is rotated to make the first open slot 201 coincide with the second open slot 120. The movable turntable 202 will fit against the rotating ring 12 and be pushed out of the fitting groove to compress the spring. Then, using the push plate 4, it is pushed against one of the placement bins 22. At this time, the lens 101 enters the sliding frame 10 along the rotation of the two limiting airbags 24, and the original lens 101 is pushed into the other placement bin 22 for storage. Subsequently, the plugging sleeve 20 is rotated back to its original position, and the rotating ring 12 is rotated. The designed movable turntable 202 will push against both sides of the lens 101 located in the through slot 102 to assist in centering the lens 101. Subsequently, the rotating ring 12 is rotated to change the position of the sliding frame 10 for zooming operation.

[0055] As an embodiment provided by the present invention, the rotating ring 12 includes a plurality of threaded plate pages 121 arranged in a circular array. An activity plate page 13 is movably arranged between every two adjacent threaded plate pages 121. Elastic threads 122 are arranged on both the threaded plate pages 121 and the activity plate page 13. The activity plate page 13 is driven to fit against the sliding frame 10 to increase the rotational damping of the rotating ring 12.

[0056] Specifically, the number of threaded plate pages 121 is not less than three. When the rotating ring 12 rotates, it is ensured that two threaded plate pages 121 are in threaded drive coupling with the sliding frame 10. The activity plate page 13 is movably arranged between two adjacent threaded plate pages 121. A fixed convex block 131 is arranged on the activity plate page 13. When precise focusing is required, the activity plate page 13 is pressed to displace, so that the elastic thread 122 on the activity plate page 13 is in threaded drive coupling with the sliding frame 10 to increase the damping of rotating the rotating ring 12, thereby facilitating the user to perform precise focusing. When the damping does not need to be increased, the index finger and thumb are used to hold the fixed convex block 131 to disengage the activity plate page 13 from the sliding frame 10, reducing the damping and facilitating accelerating the rotation of the rotating ring 12 to reach the appropriate range of zoom preset values.

[0057] Furthermore, the elastic thread 122 is a hollow triangular structure and can be deformed under the action of an external force, so that it can also perform coupling transmission when there is a dislocation during the threaded drive with the sliding frame 10 when the activity plate page 13 fits against it.

[0058] When replacing the lens 101, by rotating the rotating ring 12, the sliding frame 10 is moved to the position of the second open slot 120, and the second open slot 120 coincides with the through slot 102. Then, the two closing rings 21 are connected by two bolts 25, and the closing ring 21 is sleeved on the plugging sleeve 20. The two first open slots 201 opened on the plugging sleeve 20 are aligned with the two placement bins 22. Subsequently, the bolts 25 are tightened for clamping and fixing. After fixing, the lens 101 to be replaced is placed in one of the placement bins 22, and the plugging sleeve 20 is rotated to make the first open slot 201 coincide with the second open slot 120. The movable turntable 202 will fit against the rotating ring 12 and be pushed out of the fitting groove to compress the spring. Then, using the push plate 4, it is pushed against one of the placement bins 22. At this time, the lens 101 enters the sliding frame 10 along the rotation of the two limiting airbags 24, and the original lens 101 is pushed into the other placement bin 22 for storage. Subsequently, the plugging sleeve 20 is rotated back to its original position, and the rotating ring 12 is rotated. The designed movable turntable 202 will push against both sides of the lens 101 located in the through slot 102 to assist in centering the lens 101. Subsequently, the rotating ring 12 is rotated to change the position of the sliding frame 10 for zoom operation. When precise focusing is required, the movable plate 13 is pressed to displace, so that the elastic thread 122 on the movable plate 13 is in threaded drive coupling with the sliding frame 10 to increase the damping of rotating the rotating ring 12.

[0059] As an embodiment provided by the present invention, the movable plate 13 is provided with a convex strip 132, and two concave docking grooves 123 are opened on the threaded plate 121. The convex strip 132 is driven to be clamped in one of the concave docking grooves 123 for drive coupling or drive decoupling of the sliding frame 10.

[0060] Specifically, the two concave docking grooves 123 are respectively close to and far from the sliding frame 10. When it is necessary to increase the damping, one or more of the movable plates 13 are pressed. As the movable plate 13 moves, the convex strip 132 is clamped in the concave docking groove 123 close to the sliding frame 10 for drive coupling. When reducing the damping, the pressed movable plate 13 is used to clamp the convex strip 132 in the concave docking groove 123 far from the sliding frame 10 through the fixed convex block 131.

[0061] When replacing the lens 101, by rotating the rotating ring 12, the sliding frame 10 is moved to the position of the second open slot 120, and the second open slot 120 coincides with the through slot 102. Then, the two closing rings 21 are connected by two bolts 25, and the closing ring 21 is sleeved on the plugging sleeve 20. The two first open slots 201 opened on the plugging sleeve 20 are aligned with the two placement bins 22. Subsequently, the bolts 25 are tightened for clamping and fixing. After fixing, the lens 101 to be replaced is placed in one of the placement bins 22, and the plugging sleeve 20 is rotated to make the first open slot 201 coincide with the second open slot 120. The movable turntable 202 will fit against the rotating ring 12 and be pushed out of the fitting groove to compress the spring. Then, using the push plate 4, it is pushed against one of the placement bins 22. At this time, the lens 101 enters the sliding frame 10 along the rotation of the two limiting airbags 24, and the original lens 101 is pushed into the other placement bin 22 for storage. Subsequently, the plugging sleeve 20 is rotated back to its original position, and the rotating ring 12 is rotated. The designed movable turntable 202 will push against both sides of the lens 101 located in the through slot 102 to assist in centering the lens 101. Subsequently, the rotating ring 12 is rotated to change the position of the sliding frame 10 for zooming operation. When precise focusing is required, the movable plate 13 is pressed to displace and move, and the convex strip 132 is clamped in the concave docking groove 123 close to the sliding frame 10, so that the elastic thread 122 on the movable plate 13 is in threaded drive coupling with the sliding frame 10 to increase the damping of rotating the rotating ring 12.

[0062] As an embodiment provided by the present invention, two sliding frames 10 are slidably connected to the fixing frame, and the two sliding frames 10 are respectively in drive coupling or drive decoupling;

[0063] Symmetric sliding slots 104 are provided on the sliding frame 10, and a sliding plate 106 is slidably connected to the sliding slot 104. A coupling thread 1061 for coupling the elastic thread 122 is provided on the sliding plate 106.

[0064] Specifically, two lenses 101 are respectively provided on the two sliding frames 10, and the back focal length of the light beam is adjusted by adjusting the distance between the two lenses 101. The sliding frame 10 close to the output sleeve 15 adjusts the back focal section, and the sliding frame 10 close to the optical cable docking seat 152 adjusts the front focal section. Symmetric sliding slots 104 are provided on the sliding frame 10, and the sliding plate 106 is driven by the coupling thread 1061 to couple with the elastic thread 122. The number of sliding plates 106 is two and they are symmetrically arranged along the sliding frame 10. The sliding plate 106 can be driven to move along the sliding slot 104 to release the coupling with the elastic thread 122, so as to switch to driving one sliding frame 10 to move or driving the two sliding frames 10 to move simultaneously when rotating the rotating ring 12.

[0065] As the optimal embodiment provided by the present invention, locking mechanisms 3 are respectively arranged at both ends of the fixing frame. The locking mechanism 3 includes a telescopic rod 31. A concave slope 105 is formed on the sliding groove 104. The telescopic rod 31 is arranged on the sliding plate 106. The sliding plate 106 rotates along with the telescopic rod 31 and slides into the concave slope 105 to be decoupled and locked by fitting against the guide sliding column 111.

[0066] Specifically, the number of telescopic rods 31 is two, and they are symmetrically arranged on the two sliding plates 106. A first moving groove 103 for the telescopic rod 31 to slide is formed on the sliding frame 10. A connecting dial 32 is arranged between the two telescopic rods 31 to connect the two telescopic rods 31 for simultaneous flipping. Both connecting dials 32 extend out of the focusing collimator tube 1. Second moving grooves 141 are formed on both the bottom ring 14 and the top ring 11 for the connecting dial 32 to move. When it is necessary to unlock and lock the sliding plate 106 on the sliding frame 10, hold the connecting dial 32 and rotate it to make the sliding plate 106 slide along the sliding groove 104, so that the sliding groove 104 slides onto the concave slope 105, decoupling the coupling thread 1061 and the elastic thread 122. At the same time, the sliding plate 106 will be stuck between the guide sliding column 111 and the concave slope 105 and be restricted and locked.

[0067] Furthermore, through holes 151 are formed on both the output sleeve 15 and the bottom ring 14. A sealing plug is arranged on the through hole 151 (the sealing plug can be a conical metal plug, a threaded plug, or other structures well-known to those skilled in the art). After the telescopic rod 31 is locked, the hole of the hollow telescopic rod 31 is aligned with the through hole 151. At this time, the length of the telescopic rod 31 can be measured by a depth micrometer or a laser distance meter.

[0068] When replacing the lens 101, by rotating the rotating ring 12, the sliding frame 10 is moved to the position of the second open slot 120, and the second open slot 120 coincides with the through slot 102. Then, the two closing rings 21 are connected by two bolts 25, and the closing ring 21 is sleeved on the plugging sleeve 20. The two first open slots 201 opened on the plugging sleeve 20 are aligned with the two placement bins 22. Subsequently, the bolts 25 are tightened for clamping and fixing. After fixing, the lens 101 to be replaced is placed in one of the placement bins 22, and the plugging sleeve 20 is rotated to make the first open slot 201 coincide with the second open slot 120. The movable turntable 202 will fit against the rotating ring 12 and be pushed out by the mating groove to compress the spring. Then, using the push plate 4, it is pushed against one of the placement bins 22. At this time, the lens 101 enters the sliding frame 10 along the rotation of the two limiting airbags 24, and the original lens 101 is pushed into the other placement bin 22 for storage. Subsequently, the plugging sleeve 20 is rotated back to its original position, and the rotating ring 12 is rotated. The designed movable turntable 202 will push against both sides of the lens 101 located in the through slot 102 to assist in centering the lens 101. Subsequently, the rotating ring 12 is rotated to change the position of the sliding frame 10 for zoom operation. When precise focusing is required, the movable plate leaf 13 is pressed to displace and move, and the convex strip 132 is clamped into the concave docking groove 123 close to the sliding frame 10, so that the elastic thread 122 on the movable plate leaf 13 is in threaded drive coupling with the sliding frame 10 to increase the damping of rotating the rotating ring 12. When it is necessary to lock the sliding frame 10, hold the connecting dial ring 32 and rotate it, so that the sliding plate 106 slides along the sliding slot 104, making the sliding slot 104 slide onto the concave slope 105, decoupling the coupling thread 1061 and the elastic thread 122. At the same time, the sliding plate 106 will be clamped between the guide sliding column 111 and the concave slope 105 and be restricted and locked.

[0069] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A QBH fiber collimation module with focusing function, characterized in that: include: A focusing collimating cylinder (1) comprises a fixed frame, a sliding frame (10) slidably connected to the fixed frame, and a rotating ring (12), wherein a lens (101) is arranged on the sliding frame (10), and a second open groove (120) is symmetrically provided on the rotating ring (12); A dust sealing replacement mechanism (2), comprising a symmetrical retracting ring (21) and a sealing sleeve (20) rotatably connected to the rotating ring (12), wherein a storage bin (22) is provided on the retracting ring (21); The two retracting rings (21) are clamped on the blocking sleeve (20) via bolts (25), and the blocking sleeve (20) is rotated to ensure that the two placement chambers (22) are fixedly connected to the two second open grooves (120); One of the placement chambers (22) is used to place a lens (101) that needs to be replaced, and the other placement chamber (22) is used to push an existing lens (101) into the chamber for storage; The outer layer of the fixed frame is rotatably connected to a rotating ring (12), and the inner wall of the rotating ring (12) and the outer wall of the sliding frame (10) are threadedly driven so that the rotating ring (12) is rotated to drive the sliding frame (10) to move along the fixed frame.

2. A QBH fiber collimation module with focusing function according to claim 1, characterized in that: Sealing spring plates (23) are provided at both ends of the placement chamber (22), and limiting air bags (24) are symmetrically rotatably connected in the placement chamber (22) for pressing each other, the limiting air bags (24) pressing the lens (101) and rotating as the lens (101) moves.

3. A QBH optical fiber collimation module with focusing function according to claim 2, characterized in that: A movable turntable (202) is movably provided on the blocking sleeve (20), and the movable turntable (202) rotates along with the blocking sleeve (20) to fit the lens (101) on the sliding frame (10).

4. The QBH optical fiber collimation module with focusing function according to claim 2, characterized in that: The fixed frame comprises a top ring (11) and a bottom ring (14), and a guide column (111) for the sliding frame (10) to slide is provided between the top ring (11) and the bottom ring (14).

5. The QBH optical fiber collimation module with focusing function according to claim 4, characterized in that: The rotating ring (12) comprises a plurality of threaded plate pages (121) arranged in a circumferential array, a movable plate page (13) being movably arranged between each two adjacent threaded plate pages (121), elastic threads (122) being arranged on the threaded plate pages (121) and the movable plate pages (13), and the movable plate pages (13) being driven to fit the sliding frame (10) to increase the rotational damping of the rotating ring (12).

6. The QBH optical fiber collimation module with focusing function according to claim 5, characterized in that: The movable plate leaf (13) is provided with a convex strip (132), the threaded plate leaf (121) is provided with two concave docking grooves (123), and the convex strip (132) is driven to engage in one of the concave docking grooves (123) to drive coupling or decoupling of the sliding frame (10).

7. A QBH optical fiber collimation module with focusing function according to claim 6, characterized in that: Two sliding frames (10) are slidably connected to the fixed frame, and the two sliding frames (10) are respectively transmission coupled or transmission decoupled.

8. The QBH optical fiber collimation module with focusing function according to claim 7, characterized in that: The sliding frame (10) is symmetrically provided with sliding grooves (104), a sliding plate (106) is slidably connected to the sliding groove (104), and a coupling thread (1061) coupled to the elastic thread (122) is provided on the sliding plate (106).

9. The QBH optical fiber collimation module with focusing function according to claim 8, characterized in that: A locking mechanism (3) is provided at each end of the fixing frame, the locking mechanism (3) comprising a telescopic rod (31), a recessed slope (105) being provided on the sliding groove (104), the telescopic rod (31) being arranged on the sliding plate (106), the sliding plate (106) sliding into the recessed slope (105) as the telescopic rod (31) rotates to decouple and fit the guide slide column (111) for locking.

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