A reading mechanism and an optical fiber cutting device

Abstract

This utility model relates to a reading mechanism and an optical fiber cutting device, belonging to the technical field of optical fiber processing equipment. The reading mechanism includes a rotary joint axial stabilizer, a rotating component, and a linear ruler. The second end of the rotating component is threadedly connected to the first end of the linear ruler, and the connection section between the two is located inside the rotary joint axial stabilizer. The rotating component can rotate relative to the rotary joint axial stabilizer, and the linear ruler can move linearly relative to the rotary joint axial stabilizer. The second end of the linear ruler is set as a curved surface. This utility model can solve the technical problems that the existing technology has obvious deficiencies in propulsion accuracy and end face positioning accuracy, which restricts the manufacturing level of high-precision, low-loss optical fiber devices.

Description

Technical Field

[0001] This utility model belongs to the technical field of optical fiber processing equipment, specifically relating to a reading mechanism and an optical fiber cutting device. Background Technology

[0002] Fiber cleaving is a critical process in fiber optic device manufacturing and laser integration, and its quality directly determines the performance and reliability of subsequent fiber fusion splicing. High-quality fiber cleaving involves precisely controlling the cleaving head to apply a momentary impact to the fiber, creating controllable cracks on the fiber surface, resulting in a smooth, flat mirror-like cross-section. The quality of this cross-section is primarily measured by two core parameters: the cross-section tilt angle (the deviation of the cleaved surface from the fiber axis) and the end-face flatness (the surface roughness and the presence of defects such as microcracks and edge chipping). Studies have shown that when the fiber end-face tilt angle exceeds 0.5°, fusion splicing loss increases significantly, with a typical insertion loss increment greater than 0.3 dB, severely impacting optical signal transmission efficiency. In high-end applications such as high-power lasers, polarization-maintaining fiber devices, and multi-core fiber bundles, the requirements for fusion splicing loss and mode matching are even more stringent. Therefore, it is essential to ensure that the fiber cleaving end-face tilt angle is as close to 0° as possible, and that the end-face is highly flat, to guarantee efficient beam coupling and stable output characteristics.

[0003] Currently, fiber optic dicing equipment generally uses a micrometer-based feed mechanism to control the cutting depth and blade position. The micrometer itself is the core adjustment device, directly affecting the cutting quality. However, existing micrometers have several drawbacks, making it difficult to meet high-precision cutting requirements: First, the feed method relies on screw rotation. Traditional micrometers achieve axial displacement by rotating a screw, with a theoretical resolution of 0.01 mm. However, actual feed accuracy is limited by factors such as screw machining errors, clearance fits, and frictional nonlinearity, typically resulting in an effective accuracy of only around 0.02 mm. Second, the micrometer's tip surface design is unreasonable and prone to positioning deviations. Existing micrometers typically have a flat structure with a diameter of approximately 5 mm at the tip. During rotational feed, due to assembly errors or insufficient precision of the guiding mechanism, the normal direction of the tip surface is prone to tilting, causing the actual contact point to deviate from the ideal axial position. This tilt not only causes uneven distribution of cutting force, but may also lead to offset of the cutting point. Especially when cutting multi-fiber structures such as polarization-maintaining fiber (PMF) or fiber bundles simultaneously, the difference in force on different fiber cores is aggravated, resulting in inconsistent tilt angles of the cutting end faces of each fiber core, which seriously affects the overall cutting quality and subsequent alignment and splicing. Summary of the Invention

[0004] In response to the various shortcomings of existing technologies, a reading mechanism and an optical fiber cutting device are proposed to solve the technical problems that restrict the manufacturing level of high-precision, low-loss optical fiber devices due to the significant deficiencies in the propulsion accuracy and end-face positioning accuracy of existing technologies.

[0005] To achieve the above objectives, this utility model provides the following technical solution: In a first aspect, the present invention provides a reading mechanism, including a rotary joint axial stabilizer, a rotating member, and a linear ruler. The second end of the rotating member is threadedly connected to the first end of the linear ruler, and the connection section between the two is located inside the rotary joint axial stabilizer. The rotating member can rotate relative to the rotary joint axial stabilizer, and the linear ruler can move linearly relative to the rotary joint axial stabilizer. The second end of the linear ruler is configured as a curved surface.

[0006] The technical solution is further configured such that a lubrication fixing member is provided at the end of the axial stabilizer of the rotary pair, and the second end of the rotary member passes through the lubrication fixing member and extends into the interior of the axial stabilizer of the rotary pair.

[0007] The technical solution is further configured such that the lubrication fastener is made of polytetrafluoroethylene material.

[0008] The technical solution is further configured such that the junction between the second end of the rotating component and the lubrication fixing component, and the junction between the second end of the rotating component and the axial stabilizing component of the rotating pair, are both configured as complementary constraint structures. The complementary constraint structure restricts the linear displacement of the rotating component relative to the lubricating fixing component and the axial stabilizer of the rotating pair.

[0009] The technical solution is further configured such that a linear guide structure is provided between the first end of the linear ruler and the axial stabilizer of the rotary joint, and the linear guide structure restricts the rotation of the linear ruler relative to the axial stabilizer of the rotary joint.

[0010] The technical solution is further configured to include a fixed base, on which the axial stabilizer of the rotary joint is fixedly mounted.

[0011] The technical solution is further configured such that the axial stabilizer of the rotary joint includes a housing, and a first constraint cavity, a connecting cavity and a second constraint cavity are sequentially arranged inside the housing. The first end of the straight ruler extends into the second constraint cavity, and the second end of the rotary member sequentially passes through the first constraint cavity and the connecting cavity, and extends into the first end of the straight ruler.

[0012] The technical solution is further configured such that a limiting structure is formed at the junction of the second constraint cavity and the connecting cavity; The limiting structure restricts the minimum distance between the first end of the straight ruler and the first end of the rotating component.

[0013] Secondly, this utility model provides an optical fiber cutting device, including a cutting blade and the aforementioned reading mechanism, wherein the cutting blade is correspondingly disposed with the second end of the straight ruler, and the reading mechanism is connected to a displacement slide. The reading mechanism can move relative to the displacement slide along a first direction, and the rotating member pushes the linear ruler to move along a second direction perpendicular to the first direction. The beneficial effects of this utility model are: 1. By connecting the rotating component to the linear ruler via a thread and forcibly restricting the linear ruler to move only in a straight line, the axial runout, tilting, and frictional nonlinearity caused by the screw rotation during the advancement of traditional micrometers are avoided. This significantly improves the repeatability and absolute accuracy of the advancing displacement, meeting the extreme accuracy requirements of high-power lasers and polarization-maintaining optical fibers for cutting depth.

[0014] 2. The connection section between the rotating component and the linear ruler is located inside the axial stabilizer of the rotary joint. The axial stabilizer of the rotary joint provides long-distance, high-rigidity radial support for the rotating component, effectively suppressing the bending deformation and radial runout of the rotating component during rotation, ensuring the coaxiality of the rotational motion, and laying the foundation for high-precision linear displacement.

[0015] 3. The second end of the straight ruler is set as a curved surface to form point contact with the optical fiber or cutting blade, which can provide more flexible contact adaptability, significantly improve the robustness of the mechanism, and ensure high-quality cutting even under non-ideal working conditions.

[0016] 4. The reading mechanism and the displacement slide form a two-dimensional adjustment system. The reading mechanism can move relative to the displacement slide along the first direction to achieve the alignment of the cutting position. The rotating part pushes the linear ruler to move along the second direction to achieve fine adjustment of the cutting depth. This gives the fiber optic cutting device two-dimensional precision adjustment capability, which is particularly suitable for complex cutting scenarios that require high-precision alignment, and improves the versatility and processing flexibility of the equipment. Attached Figure Description

[0017] Figure 1 This is a top view of the reading mechanism in an embodiment of the present invention; Figure 2 for Figure 1 Sectional view of AA; Figure 3 This is a schematic diagram of the internal structure of the rotary joint axial stabilizer in this embodiment of the present invention. Figure 4 This is a schematic diagram of the rotating component in an embodiment of the present utility model; Figure 5 This is a top view of the fiber optic cutting device in an embodiment of the present invention; In the attached diagram: 100, axial stabilizer of the rotary joint; 101, first constraint cavity; 102, connecting cavity; 103, second constraint cavity; 104, second slot; 105, limiting structure; 200, rotating component; 201, first end of the rotating component; 202, second end of the rotating component; 2021, threaded section; 2022, connecting section; 203, second locking protrusion; 204, first locking protrusion; 300, straight ruler; 400, lubrication fixing component; 500, limiting cover; 600, fixed base; 700, mounting base; 800, displacement slide; 900, linear movement structure; 110, guide rail; 120, cutting blade. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, the directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the creation of this utility model.

[0019] Example 1: According to an embodiment of this utility model, a reading mechanism is provided. Please refer to [link / reference]. Figures 1 to 4 It includes a rotary joint axial stabilizer 100, a rotating member 200, and a straight ruler 300. The second end 202 of the rotating member is threadedly connected to the first end of the straight ruler 300, and the connection section between the two is located inside the rotary joint axial stabilizer 100. The rotating member 200 can rotate relative to the rotary joint axial stabilizer 100, and the straight ruler 300 can move linearly relative to the rotary joint axial stabilizer 100. The second end of the straight ruler 300 is set as a curved surface.

[0020] Optionally, the second end 202 of the rotating component is provided with an external thread, and the first end of the straight ruler 300 is provided with a cavity. The cavity wall is provided with an internal thread that matches the external thread, so as to realize the threaded connection between the second end 202 of the rotating component and the first end of the straight ruler 300.

[0021] Understandably, by threading the rotating component 200 to the linear ruler 300 and forcibly restricting the linear ruler 300 to linear movement only, the rotary joint during the motion is transformed into a linear joint, improving the advancing accuracy and stability of the linear ruler 300. This avoids the axial runout, tilting, and frictional nonlinearity caused by the screw rotation during the advancement of traditional micrometers, significantly improving the repeatability and absolute accuracy of the advancing displacement, meeting the extreme precision requirements of high-power lasers and polarization-maintaining fibers for cutting depth. Simultaneously, the connection section between the rotating component 200 and the linear ruler 300 is located inside the rotary joint axial stabilizer 100. The rotary joint axial stabilizer 100 provides long-distance, high-rigidity radial support for the rotating component 200, effectively suppressing bending deformation and radial runout during rotation, ensuring coaxiality of the rotational motion, and laying the foundation for high-precision linear displacement.

[0022] Optionally, the second end of the straight ruler 300 can be set as a curved surface, specifically a spherical or arc surface, which forms point contact with the optical fiber or cutting blade, providing more flexible contact adaptability, significantly improving the robustness of the mechanism, and ensuring high-quality cutting even under non-ideal working conditions.

[0023] Specifically, the radius of curvature of the surface is in the range of R4mm±0.1mm, the point contact area is within Φ0.05mm, the deviation of the cutting end face tilt angle is ≤±0.3°, the end face roughness is Ra=0.1μm, and the small contact area ensures that the force is directly applied to the intersection of the cutting blade and the optical fiber, avoiding edge suspension due to the tilt of the contact surface, thereby eliminating the offset of the cutting start point.

[0024] For the reading mechanism in this embodiment, please refer to... Figures 1 to 4 The end of the rotary joint axial stabilizer 100 is provided with a lubrication fixing member 400, and the second end 202 of the rotary member passes through the lubrication fixing member 400 and extends into the interior of the rotary joint axial stabilizer 100.

[0025] Optionally, the lubrication fixing part 400 is made of polytetrafluoroethylene (PTFE). PTFE has an extremely low coefficient of friction and excellent self-lubricating properties, which greatly reduces the rotational friction resistance between the rotating part 200 and the lubrication fixing part 400, making the user's rotation operation easier and smoother. It avoids the "jamming" or "creeping" phenomenon commonly found in traditional micrometers, ensuring the continuity and stability of the linear ruler 300's advance process.

[0026] Optionally, the lubrication fixing component 400 is fixed to the end of the rotary joint axial stabilizer 100 via a limiting cap 500. Specifically, the lubrication fixing component 400 and the limiting cap 500 are fixedly connected by screws. The lubrication fixing component 400 is placed in the end hole or on the end face of the rotary joint axial stabilizer 100, and the limiting cap 500 covers the outside of the lubrication fixing component 400. Screws are passed through the through hole on the limiting cap 500 and screwed into the threaded hole at the end of the rotary joint axial stabilizer 100. The tightening force of the screws firmly presses the limiting cap 500 onto the lubrication fixing component 400, thereby clamping the lubrication fixing component 400 between the limiting cap 500 and the rotary joint axial stabilizer 100, achieving fixation.

[0027] For the reading mechanism in this embodiment, please refer to... Figures 1 to 4 The junction between the second end 202 of the rotating component and the lubrication fixing component 400, and the junction between the second end 202 of the rotating component and the axial stabilizing component 100 of the rotating pair, are both configured as complementary constraint structures. The complementary constraint structure restricts the linear displacement of the rotating component 200 relative to the lubricating fixing component 400 and the axial stabilizer of the rotating pair 100.

[0028] Understandably, the complementary constraint structure, which uses a concave-convex fit, can effectively limit the axial movement of the rotating component 200, ensuring that the rotational motion is purely converted into the linear displacement of the linear ruler 300, thereby improving the accuracy and predictability of control.

[0029] Optionally, the rotating member 200 includes a first end 201 and a second end 202. The first end 201 of the rotating member is located outside the cavity of the axial stabilizer 100 of the rotary joint, and the second end 202 of the rotating member includes a threaded section 2021 and a connecting section 2022. The diameters of the first end 201 and the connecting section 2022 of the rotating member are different, thus forming a first locking protrusion 204 at their junction. Correspondingly, the inner diameter of the lubrication fixing member 400 is different from the cavity diameter of the axial stabilizer 100 of the rotary joint, thus forming a first locking groove that matches the first locking protrusion 204 at their junction. The diameters of the connecting section 2022 and the threaded section 2021 are different, thus forming a second locking protrusion 203 at their junction. Correspondingly, a second locking groove 104 that matches the second locking protrusion 203 is formed inside the cavity of the axial stabilizer 100 of the rotary joint.

[0030] Optionally, the first end 201 of the rotating part is driven by a precision stepper motor or servo motor, which can achieve submicron-level step control. The threaded section 2021 adopts a small-pitch thread. The second end of the linear ruler 300 is equipped with a piezoelectric ceramic sensor or a high-precision displacement sensor based on the piezoelectric effect, which is used to measure the actual displacement of the linear ruler 300 in real time.

[0031] For the reading mechanism in this embodiment, please refer to... Figures 1 to 4 A linear guide structure is provided between the first end of the linear ruler 300 and the axial stabilizer 100 of the rotary joint, and the linear guide structure restricts the rotation of the linear ruler 300 relative to the axial stabilizer 100 of the rotary joint.

[0032] Understandably, the linear guide structure forcibly restricts the rotation of the linear ruler 300, ensuring that the linear ruler 300 advances only along the predetermined linear direction, thereby obtaining a cutting end face with a very small tilt angle, reducing fiber optic splicing loss, and improving laser coupling efficiency.

[0033] Optionally, the linear guide structure adopts a combination of slide rail and slider. The slider is set at the first end of the linear ruler 300, and the slide rail is set on the inner wall of the cavity of the rotary pair axial stabilizer 100. Through the cooperation of the slider and the slide rail, the linear ruler 300 is restricted to rotate synchronously with the rotating component 200, so as to realize the conversion of the rotational motion of the rotating component 200 into the linear motion of the linear ruler 300.

[0034] For the reading mechanism in this embodiment, please refer to... Figures 1 to 4 It also includes a fixed base 600, on which the rotary joint axial stabilizer 100 is fixedly installed, providing a stable mounting platform for the entire reading mechanism, enhancing overall rigidity, reducing external vibration interference, and ensuring the stability of the cutting process.

[0035] Optionally, the fixed base 600 is provided with a mounting seat 700 protruding from its body. The axial stabilizer 100 of the rotary joint passes through the mounting seat 700. At the same time, the mounting seat 700 is provided with a mounting hole, and a locking screw matching its thread is provided in the mounting hole. The end of the locking screw abuts against the axial stabilizer 100 of the rotary joint, so as to realize the fixed connection between the axial stabilizer 100 of the rotary joint and the mounting seat 700.

[0036] For the reading mechanism in this embodiment, please refer to... Figures 1 to 4 The axial stabilizer 100 of the rotary joint includes a housing, and a first constraint cavity 101, a connecting cavity 102 and a second constraint cavity 103 are sequentially arranged inside the housing. The first end of the straight ruler 300 extends into the interior of the second constraint cavity 103. The second end 202 of the rotary member passes through the first constraint cavity 101 and the connecting cavity 102 in sequence, and extends into the interior of the first end of the straight ruler 300.

[0037] Understandably, the rotary joint axial stabilizer 100 adopts a split-cavity design to facilitate the assembly and positioning of internal parts.

[0038] Optionally, the diameter of the first constraint cavity 101 is different from the diameter of the connecting cavity 102, so that the second slot 104 is formed at the junction of the two.

[0039] Optionally, the diameter of the second constraint cavity 103 is different from that of the connecting cavity 102, so a limiting structure 105 is formed at the junction of the two. A gap is left between the limiting structure 105 and the first end of the linear ruler 300 to provide space for the linear movement of the linear ruler 300. The limiting structure 105 restricts the minimum distance between the first end of the linear ruler 300 and the first end of the rotating member 200, that is, restricts the limit position when the linear ruler 300 retracts.

[0040] Example 2: According to an embodiment of this utility model, an optical fiber cutting device is provided. Please refer to [link / reference]. Figures 1 to 5 It includes a cutting blade 120 and the reading mechanism, wherein the cutting blade 120 is correspondingly disposed to the second end of the straight ruler 300, and the reading mechanism is connected to the displacement slide 800; The reading mechanism can move relative to the displacement slide 800 along a first direction, and the rotating member 200 pushes the linear ruler 300 to move along a second direction perpendicular to the first direction.

[0041] It is understandable that the reading mechanism and the displacement slide 800 constitute a two-dimensional adjustment system. The reading mechanism can move relative to the displacement slide 800 along the first direction to achieve the alignment of the cutting position. The rotating part 200 pushes the linear ruler 300 to move along the second direction to achieve fine adjustment of the cutting depth. This gives the fiber optic cutting device two-dimensional precision adjustment capability, which is particularly suitable for complex cutting scenarios that require high-precision alignment, and improves the versatility and processing flexibility of the equipment.

[0042] Optionally, a high-magnification microscope (e.g., 200x-500x) and a high-resolution industrial camera can be installed at the cutting position. Before cutting, the position of the optical fiber is observed through the microscope to ensure precise alignment of the cutting blade 120, the predetermined cutting point of the optical fiber, and the second end surface of the straight ruler 300. After cutting, the microscope focuses the optical image of the optical fiber end face onto the sensor of the industrial camera to determine whether the cutting quality is acceptable.

[0043] Optionally, a linear motion structure 900 is provided on the displacement slide 800. The fixed end of the linear motion structure 900 is mounted on the displacement slide 800, and the movable end of the linear motion structure 900 is connected to the fixed base 600. Meanwhile, a guide rail 110 is provided on the displacement slide 800, and the fixed base 600 is slidably connected to the guide rail 110. The linear motion structure 900 pushes the fixed base 600 to move along the guide rail 110.

[0044] Specifically, the linear motion structure 900 can employ an electric actuator, etc.

[0045] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0047] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0048] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0049] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A reading mechanism, characterized in that, The device includes a rotary joint axial stabilizer, a rotating component, and a straight ruler. The second end of the rotating component is threadedly connected to the first end of the straight ruler, and the connection section between the two is located inside the rotary joint axial stabilizer. The rotating component can rotate relative to the rotary joint axial stabilizer, and the straight ruler can move linearly relative to the rotary joint axial stabilizer. The second end of the straight ruler is set as a curved surface.

2. The reading mechanism according to claim 1, characterized in that, The end of the axial stabilizer of the rotary joint is provided with a lubrication fixing member, and the second end of the rotary member passes through the lubrication fixing member and extends into the interior of the axial stabilizer of the rotary joint.

3. A reading mechanism according to claim 2, characterized in that, The lubrication fastener is made of polytetrafluoroethylene.

4. A reading mechanism according to claim 2 or 3, characterized in that, The junction between the second end of the rotating component and the lubrication fixing component, and the junction between the second end of the rotating component and the axial stabilizing component of the rotating pair, are both configured as complementary constraint structures. The complementary constraint structure restricts the linear displacement of the rotating component relative to the lubricating fixing component and the axial stabilizer of the rotating pair.

5. A reading mechanism according to claim 1, characterized in that, A linear guide structure is provided between the first end of the linear ruler and the axial stabilizer of the rotary joint, and the linear guide structure restricts the rotation of the linear ruler relative to the axial stabilizer of the rotary joint.

6. A reading mechanism according to claim 1, characterized in that, It also includes a fixed base, on which the axial stabilizer of the rotary joint is fixedly mounted.

7. A reading mechanism according to claim 1, characterized in that, The axial stabilizer of the rotary joint includes a housing, inside which a first constraint cavity, a connecting cavity, and a second constraint cavity are sequentially arranged. The first end of the straight ruler extends into the second constraint cavity, and the second end of the rotary member sequentially passes through the first constraint cavity and the connecting cavity, and extends into the first end of the straight ruler.

8. A reading mechanism according to claim 7, characterized in that, A limiting structure is formed at the junction of the second constraint cavity and the connecting cavity; The limiting structure restricts the minimum distance between the first end of the straight ruler and the first end of the rotating component.

9. A fiber optic cleaving device, characterized in that, It includes a cutting blade and a reading mechanism as described in any one of claims 1-8, wherein the cutting blade is disposed corresponding to the second end of the straight ruler, and the reading mechanism is connected to a displacement slide. The reading mechanism can move relative to the displacement slide along a first direction, and the rotating member pushes the linear ruler to move along a second direction perpendicular to the first direction.

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