Adjustable optical fiber interface applied to laser head

Abstract

The utility model provides an adjustable optical fiber interface applied to a laser head, and relates to the technical field of laser equipment, and the optical fiber interface comprises a column sleeve which is internally provided with a channel for the insertion of an optical fiber, and the outer side surface of the column sleeve is provided with an annular projection of which the extension direction is the same as the insertion direction of the optical fiber; the base is positioned on one side of the extension direction of the annular bulge of the column sleeve; the adjusting assembly comprises a supporting sleeve which is nested on the outer side of the column sleeve and is connected with the base, and an adjusting sleeve which is nested on the outer sides of the supporting sleeve and the column sleeve and is in threaded connection with the column sleeve; an annular groove used for containing the annular protrusion is formed between the supporting sleeve and the adjusting sleeve, and the depth, embedded into the annular groove, of the annular protrusion changes along with rotation of the adjusting sleeve. The problem that in the prior art, due to the fact that the positions of light emitting points of different laser optical fibers are different, focus position deviation can occur to installation reference surfaces corresponding to the same interface is solved.

Description

Technical Field

[0001] This application relates to the field of laser equipment technology, and in particular to an adjustable QBH fiber optic interface for use in laser heads. Background Technology

[0002] The connection between the laser processing head and the laser is usually completed through the laser head interface. However, there are significant differences in the processing shape and output point of the laser fiber of different brands and models. This can lead to differences in the zero focal point position when the laser head is matched with different laser fibers, resulting in the inability to focus. Utility Model Content

[0003] The purpose of this application is to provide an adjustable fiber optic interface for laser heads, which adds an adjustment component that does not contact the fiber optic cable and can be used to adjust the relative position of the sleeve and the base. This improves the problem in the prior art where the focal position deviates when the light emission point positions of different laser fibers are different, resulting in the same interface mounting reference surface.

[0004] To achieve the above technical objectives, this application provides an adjustable fiber optic interface for use in a laser head, comprising:

[0005] The sleeve has an internal channel for inserting an optical fiber, and the outer surface of the sleeve has an annular protrusion extending in the same direction as the insertion direction of the optical fiber.

[0006] The base is located on one side of the extending direction of the annular protrusion of the sleeve;

[0007] An adjustment assembly includes a support sleeve nested outside the column sleeve and connected to the base, and an adjustment sleeve nested outside the support sleeve and the column sleeve and threadedly connected to the column sleeve; an annular groove for accommodating the annular protrusion is provided between the support sleeve and the adjustment sleeve, and the depth to which the annular protrusion is embedded in the annular groove changes as the adjustment sleeve rotates.

[0008] Furthermore, in some embodiments of this application, the outer side of the annular protrusion is provided with an external thread of equal height to the annular protrusion, and the inner side of the adjusting sleeve is provided with an internal thread corresponding to the external thread, wherein the height of the internal thread is lower than the height of the external thread.

[0009] Furthermore, in some embodiments of this application, the outer surface of the support sleeve near the base is provided with an annular step;

[0010] On the side of the adjusting sleeve closest to the base, a ring protruding from the inner wall of the adjusting sleeve is provided corresponding to the annular step. The ring is embedded in the space formed by the annular step and the upper surface of the base, and is rotatably connected to the annular step.

[0011] Furthermore, in some embodiments of this application, the fiber optic interface further includes a locking assembly;

[0012] The locking assembly includes a positioning sleeve and a pressing sleeve; the positioning sleeve is nested on the outer surface of the column sleeve and rotatably connected to the positioning sleeve, and the positioning sleeve is provided with a positioning through hole for embedding a positioning element; the column sleeve is provided with a positioning groove corresponding to the positioning through hole;

[0013] The clamping sleeve is nested on the outer surface of the column sleeve and contacts the positioning sleeve; the clamping sleeve is threadedly connected to the column sleeve, and as the threads of the clamping sleeve and the column sleeve rotate, the clamping sleeve presses against the positioning sleeve or releases the pressure applied to the positioning sleeve.

[0014] Furthermore, in some embodiments of this application, the positioning groove extends through the column sleeve; the locking assembly further includes a positioning member for embedding into the positioning groove of the positioning through hole, the length of the positioning member being greater than the sum of the positioning groove and the positioning through hole.

[0015] Furthermore, in some embodiments of this application, a limiting hole is provided on the column sleeve, and a spring that is always kept in a compressed state is provided in the limiting hole. A spherical positioning bead is provided at the end of the spring away from the bottom surface of the limiting hole; an arc-shaped groove that mates with the spherical positioning bead is provided on the inner side wall of the positioning sleeve; the arc of the arc-shaped groove does not exceed 120°.

[0016] When the spherical positioning bead is embedded in the arc-shaped groove, the positioning through hole and the positioning groove are aligned.

[0017] Furthermore, in some embodiments of this application, a contact groove and a contact hole are provided on the outer side wall of the column sleeve and are provided on the bottom surface of the contact groove and extend from the outer surface of the column sleeve to the inner surface of the column sleeve. A contact assembly for electrical connection with an optical fiber is provided in the contact hole; an elastic ring for fixing the contact assembly is provided in the contact groove.

[0018] Furthermore, in some embodiments of this application, at least three of each of the positioning pins, positioning grooves, and positioning through holes are provided, and they are arranged in a circular array along the axis of the sleeve.

[0019] Furthermore, in some embodiments of this application, a sealing element is provided between the support sleeve and the column sleeve.

[0020] Furthermore, in some embodiments of this application, a seal is provided between the support sleeve and the base.

[0021] Furthermore, in some embodiments of this application, a seal is provided between the adjusting sleeve and the base.

[0022] Furthermore, in some embodiments of this application, a sealing element is provided between the support sleeve and the column sleeve.

[0023] Furthermore, in some embodiments of this application, a sealing element is provided between the clamping sleeve and the column sleeve.

[0024] Furthermore, in some embodiments of this application, a sealing element is provided between the positioning sleeve and the column sleeve.

[0025] Furthermore, in some embodiments of this application, the inner sidewall of the column sleeve is also provided with a variable diameter section corresponding to the optical fiber.

[0026] This application provides an adjustable fiber optic interface for laser heads. An adjustment component is added to the surface of the sleeve, forming a threaded connection with the sleeve to allow for telescopic adjustment of the positional relationship between the sleeve and the base. This makes the mounting reference plane of the fiber optic interface adjustable. For laser fibers with different emission points, the focal position can be adjusted by adjusting the corresponding mounting reference plane, avoiding focusing difficulties caused by incompatibility between the laser, laser fiber, and fiber optic interface models. The adjustable fiber optic interface provided in this application can also be directly used for focusing, making the focusing process simple and easy to operate. Furthermore, in this application, the adjustable fiber optic interface can also be used for lateral locking of the fiber, providing adjustable redundancy in both the vertical and horizontal directions. This avoids the problem of loosening caused by insufficient locking of fibers from different manufacturers due to slight differences in diameter, thus improving stability. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the adjustable fiber optic interface applied to a laser head in some embodiments provided in this application;

[0029] Figure 2 Exploded view of an adjustable fiber optic interface applied to a laser head in some embodiments provided in this application;

[0030] Figure 3 , 4 A cross-sectional view along the axial direction of an adjustable fiber optic interface applied to a laser head in some embodiments provided in this application;

[0031] Figure 5 A schematic diagram of the contact assembly installed on the adjustable fiber optic interface of the laser head in some embodiments provided in the application;

[0032] Figure 6 This application provides schematic diagrams of the structure of the adjustable fiber optic interface sleeve for the laser head and the contact assembly mounted on the sleeve in some embodiments.

[0033] Figure 7 This application provides schematic diagrams of the mounting structure of the contact plate for the adjustable fiber optic interface of a laser head in some embodiments;

[0034] Figure 8 A cross-sectional view of the positioning sleeve and the cylindrical sleeve of the adjustable fiber optic interface for the laser head in some embodiments provided in this application, along the direction perpendicular to the axis.

[0035] Figure 9 Schematic diagrams of irregularly shaped magnetic components in some embodiments of the anti-collision assembly provided in this application;

[0036] Explanation of key component symbols:

[0037] 10-Post sleeve, 11-Annular protrusion, 12-Channel, 13-Positioning groove, 14-Limiting hole, 15-Spring, 16-Spherical positioning bead, 17-Contact groove, 18-Contact hole, 20-Base, 21-Contact plate, 22-Fastener, 30-Adjusting assembly, 31-Support sleeve, 312-External thread, 32-Adjusting sleeve, 321-Annular ring, 322-Internal thread, 33-Annular groove, 34-Locking component, 35-Support ring, 40-Locking assembly, 41-Positioning sleeve, 411-Positioning through hole, 412-First arc groove, 413-Second arc groove, 42-Pressure sleeve, 43-Positioning component, 50-Contact assembly, 51-Elastic ring, 60-Sealing ring, 71-First indicator position, 72-Second indicator position, 73-Third indicator, 74-Insert indicator, 75-Indicator pin. Detailed Implementation

[0038] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, it should be understood that the terms "upper," "lower," "rear," "left," "right," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0041] Laser heads and lasers are typically connected via laser fibers and fiber optic interfaces to house them. The stability of the fiber and its interface is crucial for ensuring stable laser operation. To guarantee laser stability and focusing, the fiber optic interface usually has a mounting reference surface to determine the fiber's position and a locking ring that acts directly on the fiber and interface to secure it. However, in existing technologies, dimensional inconsistencies during fiber manufacturing can occur, and when fibers and interfaces come from different manufacturers, the mounting reference surface of the interface may not be compatible with the fiber. This leads to a deviation in the laser's focal point after the fiber is mounted with the interface's mounting reference surface, affecting laser performance. Furthermore, due to the uncertainty of fiber and interface errors, the interface can easily become jammed after each locking, making disassembly impossible. This necessitates splitting the interface to remove the fiber, potentially damaging the interface. Based on this, this application provides a novel adjustable fiber optic interface for a laser head. This interface utilizes an adjustment component 30, which, through a threaded connection with the sleeve 10, allows for changes in the relative position between the sleeve 10 and the base 20. This adjusts the mounting reference surface of the interface, solving the problem of incompatibility between the fiber and the interface mounting reference surface caused by production inconsistencies or differences between manufacturers in the prior art. Furthermore, this structure can also be used for other focusing problems caused by optical path length. Simply adjusting the interface allows for adjustment of the relative position between the fiber's output point and the laser head, thus achieving focal length adjustment, making the adjustment process simple and easy to operate. In addition, the adjustment component 30 of the adjustable fiber optic interface provided in this application can also lock the fiber laterally, ensuring that the diameter of fibers from different manufacturers or with poor production consistency can be locked, preventing the fiber from being difficult to lock laterally and prone to loosening due to differences in manufacturers or poor production consistency. The specific technical solution is as follows:

[0042] For adjustable fiber optic interfaces used in laser heads, please refer to [link / reference]. Figures 1-4 ,include:

[0043] The sleeve 10 has an internal channel 12 for inserting optical fibers, and the outer surface of the sleeve 10 has an annular protrusion 11 extending in the same direction as the insertion direction of the optical fiber.

[0044] The base 20 is located on one side of the extending direction of the annular protrusion 11 of the sleeve 10;

[0045] The channel 12 within the sleeve 10 for inserting the optical fiber is typically configured in three sections, corresponding to the structure of the optical fiber: a large-diameter section, a variable-diameter section, and a small-diameter section. These three sections are sequentially connected to form the channel 12 for inserting the optical fiber. The base 20 is not directly connected to the side of the small-diameter section furthest from the large-diameter section; instead, it is connected via an adjustable telescopic connection using an adjusting assembly 30.

[0046] The adjustment assembly 30 includes a support sleeve 31 nested outside the column sleeve 10 and connected to the base 20, and an adjustment sleeve 32 nested outside the support sleeve 31 and the column sleeve 10 and threadedly connected to the column sleeve 10. An annular groove 33 for accommodating the annular protrusion 11 is provided between the support sleeve 31 and the adjustment sleeve 32, and the depth of the annular protrusion 11 embedded in the annular groove 33 changes as the adjustment sleeve 32 rotates.

[0047] The base 20 has an annular protrusion corresponding to the sleeve 10. The inner diameter of the annular protrusion is not less than the inner diameter of the small diameter segment, and its outer diameter is equal to or approximately equal to the outer diameter of the small diameter segment. The support sleeve 31 is fitted over the small diameter segment and the annular protrusion. The support sleeve 31 is fixedly connected to the base 20 and is provided with a first sealing element to prevent impurities, dust, etc. from entering the interface from between the support sleeve 31 and the base 20.

[0048] In this application, the adjusting sleeve 32 and the supporting sleeve 31 of the adjusting component 30 form a three-layer nested structure with the column sleeve 10, which not only makes the interface adjustable, but also achieves a better sealing effect.

[0049] In some embodiments, the outer side of the annular protrusion 11 is provided with an external thread 312 of equal height to the annular protrusion 11, and the inner side of the adjusting sleeve 32 is provided with an internal thread 322 corresponding to the external thread 312, the height of the internal thread 322 being lower than the height of the external thread 312. In some embodiments, the sleeve 10 is also provided with a scale, which can be used for direct reading to determine the adjustment height of the adjusting component 30. Preferably, the scale on the sleeve 10 is an annular scale arranged around the sleeve 10, the annular scale having a 0 point, and the adjusting sleeve 32 is provided with an indicator. When the adjusting sleeve 32 is rotated until the annular protrusion 11 of the sleeve 10 is in close contact with the bottom surface of the annular groove 33, the indicator aligns with the 0 point of the annular scale. The reading using the annular scale is clearer and more accurate, especially beneficial for focusing adjustment.

[0050] In some embodiments, the outer surface of the support sleeve 31 near the base 20 is provided with an annular step; the side of the adjustment sleeve 32 near the base 20 is provided with an annular ring 321 protruding from the inner wall of the adjustment sleeve 32, the annular ring 321 being embedded in the space formed by the annular step and the upper surface of the base 20, and being rotatably connected to the annular step. In other embodiments, a second annular ring 321 is provided on the inner side of the adjusting sleeve 32 near the annular ring 321. The second annular ring 321 and the annular ring 321 form a step with a gradually increasing inner diameter. The inner wall of the second annular ring 321 fits against the outer wall of the support sleeve 31. The space between the second annular ring 321 of the adjusting sleeve 32 and the inner thread 322 that connects to the external thread 312 of the column sleeve 10 does not contact the support sleeve 31 or the column sleeve 10. The support sleeve 31 and the column sleeve 10 are clamped from both ends of the adjusting sleeve 32. While maintaining a seal, the friction between the adjusting sleeve 32 and the support sleeve 31 and the column sleeve 10 is reduced, which facilitates adjustment.

[0051] A second sealing element is provided between the adjusting sleeve 32 and the base 20, and a third sealing element is provided between the adjusting sleeve 32 and the base 20 to improve the sealing effect.

[0052] In use, rotating the adjusting sleeve 32 causes the column sleeve 10 to move up and down within the annular groove 33 formed by the support sleeve 31 and the adjusting sleeve 32, thereby adjusting the position of the column sleeve 10 relative to the base 20. Because the laser fiber is locked onto the column sleeve 10, the column sleeve 10 can move the laser fiber up and down, and the position of the fiber optic output point remains unchanged, thus achieving the adjustment of the position of the fiber optic output point relative to the base 20, i.e., on the laser head.

[0053] In some embodiments, the column sleeve 10 and the support sleeve 31 are metal sleeves with a certain degree of toughness, such as copper sleeves or copper alloy sleeves. The toughness of the adjusting sleeve 32 is lower than that of the rigid sleeves of the column sleeve 10 and the support sleeve 31, such as ceramic sleeves. The column sleeve 10 includes an adjusting section that is nested within the adjusting sleeve 32 or may be nested within the adjusting sleeve 32; the outer diameter of the adjusting section near the base 20 is higher than the outer diameter of the adjusting section away from the base 20; the diameter of the support sleeve 31 near the base 20 is lower than the outer diameter of the support sleeve 31 away from the base 20; the inner diameter of the area where the adjusting sleeve 32 contacts the column sleeve 10 is interference-fitted with the corresponding outer diameter of the column sleeve 10.

[0054] It should be noted that "the outer diameter of the end of the adjusting section near the base 20 is higher than the outer diameter of the end of the adjusting section away from the base 20" means that the outer diameter of the end of the adjusting section near the base 20 is slightly higher than the outer diameter of the end of the adjusting section away from the base 20, forming a certain micro-flare structure, and the difference between the outer diameter of the end of the adjusting section near the base 20 and the outer diameter of the end of the adjusting section away from the base 20 does not exceed 2%. Similarly, "the diameter of the end of the support sleeve 31 near the base 20 is lower than the diameter of the end of the support sleeve 31 away from the base 20" means that the diameter of the end of the support sleeve 31 near the base 20 is slightly lower than the diameter of the end of the support sleeve 31 away from the base 20, forming a certain micro-flare structure, and the difference between the diameter of the end of the support sleeve 31 near the base 20 and the diameter of the end of the support sleeve 31 away from the base 20 does not exceed 2%. This is because the size difference of optical fibers due to processing consistency and different manufacturers of the same specifications is usually not too large. Therefore, as long as it is controlled within this range, the problem of easy loosening caused by the mismatch of the outer diameter of the optical fiber due to processing consistency and different manufacturers can be solved, and lateral adjustment can be achieved.

[0055] In other embodiments, the sidewall of the support sleeve 31 is further provided with a locking hole extending from the outer surface of the support sleeve 31 to the inner surface. A locking member 34 is detachably connected to the locking hole, and the end of the locking member 34 contacts the outer surface of the column sleeve 10, further improving the locking and fixing of the column sleeve 10 and the support sleeve 31. The locking member 34 can be any fastener 22 capable of locking, such as a screw.

[0056] In some embodiments, at least one support groove is provided on the outer surface of the sleeve 10 at the position where it contacts the support sleeve 31. A support ring 35 with a mirror-like surface is disposed within the support groove. The surface of the support ring 35 slightly protrudes from the outer surface of the sleeve 10, and the outer diameter of the support ring 35 is interference-fitted with the inner diameter of the support sleeve 31. This reduces friction between the outer surface of the sleeve 10 and the inner surface of the support sleeve 31, making adjustment between the sleeve 10 and the support sleeve 31 smoother, while ensuring the coaxiality of the support sleeve 31 and the sleeve 10. Preferably, two support rings 35 are provided.

[0057] In other embodiments, the locking member 34 is located on both sides of the two support rings 35, and the sum of the distances from the two support rings 35 is greater than the depth of the annular groove 33.

[0058] In some embodiments, the fiber optic interface further includes a locking component 40 for locking the fiber optic cable, which, together with the adjustment component 30, achieves double locking of the fiber optic cable.

[0059] The locking assembly 40 includes a positioning sleeve 41 and a pressing sleeve 42; the positioning sleeve 41 is nested on the outer surface of the column sleeve 10 and is rotatably connected to the positioning sleeve 41, and the positioning sleeve 41 is provided with a positioning through hole 411 for embedding the positioning member 43; the column sleeve 10 is provided with a positioning groove 13 corresponding to the positioning through hole 411;

[0060] The clamping sleeve 42 is nested on the outer surface of the column sleeve 10 and contacts the positioning sleeve 41; the clamping sleeve 42 is threadedly connected to the column sleeve 10, and as the clamping sleeve 42 rotates with the thread of the column sleeve 10, the clamping sleeve 42 presses the positioning sleeve 41 or releases the pressure applied to the positioning sleeve 41.

[0061] The positioning groove 13 penetrates the sleeve 10; the locking assembly 40 further includes a positioning member 43 for embedding into the positioning groove 13 of the positioning through hole 411, the length of the positioning member 43 being greater than the sum of the positioning groove 13 and the positioning through hole 411. The positioning member 43 may be a positioning pin.

[0062] It should be noted that the locking component 40 is correspondingly disposed on the outer side of the large-diameter section and is used to lock the optical fiber on one side of the large-diameter section. The outer surface of the clamping sleeve 42 has a hexagonal, pentagonal, or quadrilateral structure, which can be tightened or loosened using a corresponding wrench. The positioning pin is preferably a threaded pin, and the positioning groove 13 is threaded corresponding to the threaded pin, realizing the threaded connection between the positioning pin and the positioning groove 13.

[0063] In some embodiments, see Figure 9 The sleeve 10 is provided with a limiting hole 14, and a spring 15 that is always kept in a compressed state is provided in the limiting hole 14. A spherical positioning bead 16 is provided at the end of the spring 15 away from the bottom surface of the limiting hole 14. The inner sidewall of the positioning sleeve 41 is provided with a first arc-shaped groove 412 and a second arc-shaped groove 413 that cooperate with the spherical positioning bead 16. The arc of the first arc-shaped groove 412 and the second arc-shaped groove 413 does not exceed 120°, so that when the positioning sleeve 41 is rotated, the spherical positioning bead can be disengaged from the first arc-shaped groove 412 and the second arc-shaped groove 413 under the action of a large torque, avoiding jamming. Preferably, the spherical positioning bead can be a steel ball. The first arc-shaped groove 412 is used to position the insertion direction of the fiber, and the second arc-shaped groove 413 is used to position the positioning member 43 embedded in the positioning groove 13 to press the optical fiber.

[0064] When the spherical positioning bead 16 is embedded in the second arc-shaped groove 413, the positioning through hole 411 and the positioning groove 13 are aligned.

[0065] In some embodiments, see Figure 5The sleeve 10 is further provided with an indicator assembly, which includes an indicator pin 75 protruding from the inner surface of the sleeve 10, a first indicator position 71 on the positioning sleeve 41, a second indicator position 72 on the positioning sleeve 41, a first indicator mark 71 on the sleeve 10, and an insertion indicator mark 74 on the sleeve 10. When the first indicator position 71, the insertion indicator mark 74, and the indicator pin 75 are aligned, a spherical positioning bead 16 enters the first arc-shaped groove 412 to indicate that an optical fiber can be inserted. The distance between the indicator pin 75 protruding from the inner surface of the sleeve 10 does not exceed 2.0 mm. When the positioning sleeve 41 is rotated, when the first indicator mark 71 and the third indicator position 73 are aligned, the spherical positioning bead 16 enters the second arc-shaped groove 413 to indicate that a positioning pin can be inserted. The insertion indicator mark 74 is used to indicate that the optical fiber is aligned with the insertion guide groove.

[0066] Preferably, the positioning groove 13 provided on the column sleeve 10 is a waist-shaped groove with its length direction perpendicular to the axis of the column sleeve 10, and the positioning pin is embedded in the waist-shaped groove and can move laterally along the waist-shaped groove.

[0067] Preferably, the number of the positioning pins, positioning grooves 13, and positioning through holes 411 is at least three, and the positioning pins, positioning grooves 13, and positioning through holes 411 are arranged in a circular array along the axis of the sleeve 10.

[0068] Taking a case where there are three positioning pins, three positioning slots 13, and three positioning through holes 411, and the positioning slot 13 is an oblong slot: During use, the positioning sleeve 41 is rotated clockwise to reset. When a "click" is heard, the spherical positioning bead 16 is inserted into the first arc-shaped slot 412 of the positioning sleeve 41. At this time, the indicator pin 75 and the first indicator position 71 are aligned. The three positioning pins of the positioning sleeve 41 are rotated to the right end of the three oblong holes, with one oblong hole aligned with the indicator pin 75 and the first indicator position 71, all three on a straight line. This aligns the guide groove of the laser fiber with the third indicator on the interface post sleeve 10. Insert the optical fiber into the interface until it reaches the end (the conical surface on the laser fiber rod cannot be inserted further when it touches the conical surface on the interface column). Then, rotate the positioning sleeve 41 counterclockwise. When you hear a "click", the steel ball will be inserted into the second arc-shaped groove 413 of the positioning sleeve 41. The three positioning pins will then move along the three waist-shaped grooves to the leftmost side of the waist-shaped groove. At this time, the second indicator position 72 on the column sleeve 10 is aligned with the position of the positioning through hole 411 on the positioning sleeve 41. Then, rotate the clamping sleeve 42 counterclockwise to clamp the positioning sleeve 41. The three positioning pins on the positioning sleeve 41 clamp the optical fiber, and the locking is complete.

[0069] In the locked state, the two copper rings on the laser's optical fiber are in direct contact with the contact assembly 50 of the optical fiber interface. (See also...) Figure 8The two contacts of the contact plate 21 on the base 20 can be connected to the alarm signal line of the laser head, and the default is a closed signal. When the laser head outputs an abnormal alarm signal, the two contacts are disconnected, the laser receives the disconnect signal, and stops emitting light to avoid damage to the laser fiber and the laser head. When removing the fiber, first rotate the clamping sleeve 42 clockwise, then rotate the positioning sleeve 41 clockwise until the first indicator position 71 is aligned with the indicator pin 75, and then pull out the fiber rod.

[0070] In this application, apart from the positioning pin which has direct contact and locking with the optical fiber, the other locking and adjusting components 30 do not have direct contact and locking with the optical fiber. Therefore, the diameter redundancy between the sleeve 10 and the optical fiber can be increased to a certain extent, avoiding the problem of the optical fiber being stuck and unable to be pulled out due to the strict interference fit between the optical fiber and the sleeve 10, and reducing the problem of interface jamming.

[0071] In some embodiments, see Figure 6 , Figure 7 The outer wall of the sleeve 10 is provided with a contact groove 17 and a contact hole 18 disposed on the bottom surface of the contact groove 17 and extending from the outer surface of the sleeve 10 to the inner surface of the sleeve 10. A contact assembly 50 for electrical connection with an optical fiber is disposed within the contact hole 18. An elastic ring 51 for fixing the contact assembly 50 is disposed within the contact groove 17, so that the contact assembly 50 is fixed in the contact groove 17 of the sleeve 10, and its contact for electrical connection with the optical fiber passes through the contact hole 18 and is flush with or nearly flush with the inner surface of the sleeve 10, so as to facilitate contact between the optical fiber and the contact point. The contact assembly 50 includes a circuit board, a wire for connecting the circuit board to an external power supply, and contacts electrically connected to the circuit board. The contact assembly 50 can be connected to the alarm signal of the laser head, automatically shutting off the laser when a fault alarm occurs.

[0072] A sealing element is also provided between the compression sleeve 42 and the column sleeve 10, and between the positioning sleeve 41 and the column sleeve 10, to improve the sealing effect.

[0073] It should be noted that the first, second, and third seals, as well as the sealing rings 60 made of elastic material, are all existing technologies and will not be described in detail here. This will not affect the understanding and implementation of this solution by those skilled in the art. Furthermore, the base 20 can be fixed to other devices using fasteners 22.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An adjustable fiber optic interface for use in a laser head, characterized in that, include: The sleeve has an internal channel for inserting an optical fiber, and the outer surface of the sleeve has an annular protrusion extending in the same direction as the insertion direction of the optical fiber. The base is located on one side of the extending direction of the annular protrusion of the sleeve; An adjustment assembly includes a support sleeve nested outside the column sleeve and connected to the base, and an adjustment sleeve nested outside the support sleeve and the column sleeve and threadedly connected to the column sleeve; an annular groove for accommodating the annular protrusion is provided between the support sleeve and the adjustment sleeve, and the depth to which the annular protrusion is embedded in the annular groove changes as the adjustment sleeve rotates.

2. The adjustable fiber optic interface for a laser head according to claim 1, characterized in that, The outer side of the annular protrusion is provided with an external thread of equal height to the annular protrusion, and the inner side of the adjusting sleeve is provided with an internal thread corresponding to the external thread, the height of the internal thread being lower than the height of the external thread.

3. The adjustable fiber optic interface for a laser head according to claim 1, characterized in that, The outer surface of the support sleeve near the base is provided with an annular step; On the side of the adjusting sleeve closest to the base, a ring protruding from the inner wall of the adjusting sleeve is provided corresponding to the annular step. The ring is embedded in the space formed by the annular step and the upper surface of the base, and is rotatably connected to the annular step.

4. The adjustable fiber optic interface for a laser head according to any one of claims 1 to 3, characterized in that, It also includes locking components; The locking assembly includes a positioning sleeve and a pressing sleeve; the positioning sleeve is nested on the outer surface of the column sleeve and rotatably connected to the positioning sleeve, and the positioning sleeve is provided with a positioning through hole for embedding a positioning element; the column sleeve is provided with a positioning groove corresponding to the positioning through hole; The clamping sleeve is nested on the outer surface of the column sleeve and contacts the positioning sleeve; the clamping sleeve is threadedly connected to the column sleeve, and as the threads of the clamping sleeve and the column sleeve rotate, the clamping sleeve presses against the positioning sleeve or releases the pressure applied to the positioning sleeve.

5. The adjustable fiber optic interface for a laser head according to claim 4, characterized in that, The positioning groove extends through the column sleeve; the locking assembly further includes a positioning element for embedding into the positioning groove of the positioning through hole, the length of which is greater than the sum of the positioning groove and the positioning through hole.

6. The adjustable fiber optic interface for a laser head according to claim 4, characterized in that, The sleeve is provided with a limiting hole, and a spring that is always kept in a compressed state is provided in the limiting hole. A spherical positioning bead is provided at the end of the spring away from the bottom surface of the limiting hole. An arc-shaped groove that mates with the spherical positioning bead is provided on the inner side wall of the positioning sleeve. The arc of the arc-shaped groove does not exceed 120°. When the spherical positioning bead is embedded in the arc-shaped groove, the positioning through hole and the positioning groove are aligned.

7. The adjustable fiber optic interface for a laser head according to claim 4, characterized in that, The outer wall of the column sleeve is provided with a contact groove and a contact hole provided on the bottom surface of the contact groove and extending from the outer surface of the column sleeve to the inner surface of the column sleeve. A contact assembly for electrical connection with an optical fiber is provided in the contact hole. An elastic ring for fixing the contact assembly is provided in the contact groove.

8. The adjustable fiber optic interface for a laser head according to claim 4, characterized in that, The positioning element, positioning groove, and positioning through hole are each provided in at least three forms, and are arranged in a circular array along the axis of the column sleeve.

9. The adjustable fiber optic interface for a laser head according to claim 4, characterized in that, A sealing element is provided between the support sleeve and the column sleeve, and / or A sealing element is provided between the support sleeve and the base, and / or A sealing element is provided between the adjusting sleeve and the base, and / or A sealing element is provided between the support sleeve and the column sleeve, and / or A sealing element is provided between the clamping sleeve and the column sleeve, and / or A sealing element is provided between the positioning sleeve and the column sleeve.

10. The adjustable fiber optic interface for a laser head according to claim 1, characterized in that, The inner wall of the sleeve is also provided with a variable diameter section corresponding to the optical fiber.

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