Capillary cutting tooling jig

Abstract

The application relates to the technical field of capillary processing, and provides a capillary cutting tool jig, which comprises a base body and a limiting mechanism and a cutting mechanism integrated on the base body. The limiting mechanism is mainly used for clamping the capillary to keep the stability of the capillary during cutting. The cutting mechanism comprises a cutting knife, an adjusting assembly, a linear guide rail and a driving piece. The cutting knife is installed on the linear guide rail through the adjusting assembly, the linear guide rail is connected to the base body, and the driving piece can drive the cutting knife to move in a first direction under the limitation of the linear guide rail. During cutting, the cutting knife can cut a guide notch on the surface of the cutting area of the capillary, and a tangential force is applied to the capillary at the same time, so that the capillary can be separated along the guide notch, and the cutting is completed. The above scheme can meet the requirements of the flatness and completeness of the section after the capillary is cut, and can improve the problem of unstable cutting.

Description

Technical Field

[0001] This application relates to the field of capillary processing technology, and in particular to a capillary cutting fixture. Background Technology

[0002] Capillary tubes are widely used in microfluidics. Their structure mainly consists of a quartz inner tube and a surface resin polymer layer. These capillary tubes have extremely small outer diameters, typically less than 0.5 mm. They suffer from the characteristics of a rigid quartz inner tube, making them prone to breakage and clogging, while also requiring a high degree of cross-sectional flatness. Conventional cutting tools such as scissors or utility knives often fail to produce cross-sections that meet usage requirements, frequently necessitating secondary cutting. Furthermore, during long-term use, the capillary ends are prone to clogging, requiring further trimming of the ends.

[0003] Currently, most operators use ceramic discs to manually cut capillary tubes. Practical application shows that this manual method has significant shortcomings: first, the operation varies from person to person, resulting in poor cutting stability; second, the cutting effect is unsatisfactory, the capillary cross-section has poor flatness, the quartz inner tube is easily broken, and the integrity of the tube body is affected. Summary of the Invention

[0004] In view of the above problems, this application provides a capillary cutting tooling fixture, which can improve the problems of poor cross-sectional flatness, poor integrity and poor stability caused during capillary cutting.

[0005] This application provides a capillary cutting fixture, including a base, a limiting mechanism, and a cutting mechanism. The limiting mechanism is connected to the base and is configured to clamp the capillary and form a cutting space that exposes the cutting area of ​​the capillary. The cutting mechanism includes a cutting blade, an adjusting assembly, a linear guide rail, and a driving member. The cutting blade is mounted on the linear guide rail via the adjusting assembly. The linear guide rail is connected to the base. The driving member is configured to drive the cutting blade to move along a first direction under the constraint of the linear guide rail. During the movement along the first direction, the cutting blade passes through the cutting space and cuts a guide slit on the surface of the cutting area of ​​the capillary. During the process of cutting the guide slit, the cutting blade applies a tangential force to the capillary along a second direction, enabling the capillary to be divided along the guide slit. The first direction intersects the axial direction of the capillary, the second direction is perpendicular to the first direction, and the second direction is also parallel to a radial direction within the capillary.

[0006] In some embodiments, the cutting blade has a cutting edge extending in a first direction for cutting to form a guide slit; wherein a local structure of the cutting edge protrudes toward the capillary in a second direction to form a cutting peak, the cutting peak being smoothly connected to both ends of the cutting edge in the first direction, and the cutting peak protruding from both ends of the cutting edge in the first direction in the second direction.

[0007] In some embodiments, the cutting edge is an arc-shaped cutting edge with a central protrusion; or, the cutting edge includes two cutting edges, and the junction of the two cutting edges forms a cutting peak.

[0008] In some embodiments, the cutting blade has a plate-like structure, and multiple cutting edges are formed around its outer periphery in the thickness direction; the cutting blade is detachably mounted and fixed on the adjustment assembly by fasteners so that the multiple cutting edges can be switched to working positions in turn; wherein the cutting edges in the working position can cut capillaries during the movement of the cutting blade in the first direction.

[0009] In some embodiments, the cutting blade is provided with a first positioning part; the adjusting assembly is provided with a second positioning part; one of the first positioning part and the second positioning part is a protrusion structure and the other is a slot structure, the protrusion structure can be embedded in the slot structure to limit the distance between the cutting edge of the blade in the working position and the cutting area of ​​the capillary in the second direction.

[0010] In some embodiments, the protruding structure has a plurality of first positioning surfaces in its circumferential direction, the number of which is the same as the number of cutting edges; the slot structure has a plurality of second positioning surfaces in its circumferential direction, the number of which is the same as the number of first positioning surfaces; wherein any one of the first positioning surfaces can alternately cooperate with each of the second positioning surfaces, so that each cutting edge can alternately switch to the working position.

[0011] In some embodiments, the distance between the two points furthest apart in the second direction of the guide cut is the cutting depth d, and the diameter of the capillary is D, where d and D satisfy: 0.25D < d < 0.4D.

[0012] In some embodiments, the adjustment assembly includes a fixed plate and an adjustment seat; the fixed plate is used to mount and fix the cutting blade; the adjustment seat is connected between the fixed plate and the linear guide rail, and the fixed plate is adjustablely fixed on the adjustment seat in a second direction.

[0013] In some embodiments, the cutting blade has a first limiting surface; the fixing plate has a second limiting surface; the first limiting surface and the second limiting surface abut against each other along a third direction; wherein, the third direction is the axial direction of the capillary.

[0014] In some embodiments, the substrate is a shell structure, and a first slot and a second slot are provided on the shell wall of the substrate. Both the first slot and the second slot extend along a first direction. The cutting blade can pass through the first slot and move along the first direction. The driving member can pass through the second slot and move along the first direction. The adjusting component and the linear guide rail are disposed inside the substrate. The limiting mechanism is disposed on the outer wall of the substrate, and the cutting space formed on the limiting mechanism corresponds to the first slot in the second direction.

[0015] In some embodiments, a locking unit is provided between the shell wall of the substrate and the cutting mechanism; the cutting blade can reciprocate between a first position and a second position along a first direction under the drive of the driving member; when the cutting blade is in the first position and / or the second position, the position of the cutting blade can be locked by the locking unit.

[0016] In some embodiments, the locking unit includes a first magnet and a second magnet; the substrate has a first shell wall and a second shell wall disposed opposite to each other in a first direction; the cutting mechanism has a first mating surface facing the first shell wall and a second mating surface facing the second shell wall; a first magnet is disposed on one of the first shell wall and the first mating surface, and a second magnet is disposed on one of the second shell wall and the second mating surface; when the cutting blade is in a first position, under the attraction of the first magnet, the first mating surface is fixed to the first shell wall, so that the cutting blade can be locked in the first position; when the cutting blade is in a second position, under the attraction of the second magnet, the second mating surface is fixed to the second shell wall, so that the cutting blade can be locked in the second position.

[0017] In some embodiments, a protective plate is provided on the substrate; the protective plate protrudes from the substrate along a second direction and is located on the side of the limiting mechanism in a third direction; wherein, the third direction is the axial direction of the capillary.

[0018] In some embodiments, the limiting mechanism includes a first limiting member and a second limiting member; the first limiting member is provided with a through hole, and the second limiting member is provided with a blind hole, the blind hole being coaxially arranged with the through hole; wherein, the capillary tube can pass through the through hole and be inserted to the bottom of the blind hole.

[0019] In some embodiments, the diameter of the through-hole and / or the diameter of the blind hole are matched to the outer diameter of the capillary.

[0020] In some embodiments, a first guide surface is provided at the end of the through hole away from the second limiting member, and the first guide surface is configured to guide the capillary into the through hole; and / or, a second guide surface is provided at the end of the blind hole near the first limiting member, and the second guide surface is configured to guide the capillary into the blind hole.

[0021] In some embodiments, the second limiting member is provided with a cleaning groove, which is connected to the blind hole and located at the end of the blind hole away from the first limiting member; at least a portion of the structure of the cleaning groove is exposed on the outside of the second limiting member.

[0022] In some embodiments, the second limiting member has a hinged end and a locking end. The hinged end is hinged to the base via a pin, and the locking end is detachably locked to the base. When the locking end is locked to the base, the blind hole can be coaxially arranged with the through hole. When the locking end is opened, the second limiting member can rotate about the pin and can drive the cleaning groove away from the base.

[0023] In some embodiments, the first limiting member and the second limiting member are spaced apart and the gap between them forms a cutting space.

[0024] In some embodiments, the materials of the first limiting member and / or the second limiting member include, but are not limited to, one of polyetheretherketone, polytetrafluoroethylene, and polyoxymethylene.

[0025] The above technical solution provides a capillary cutting fixture that integrates a limiting mechanism and a cutting mechanism into a base, enabling the fixture to be miniaturized and lightweight for easy portability. Furthermore, the limiting mechanism clamps and fixes the capillary, maintaining its stability during cutting and improving cutting stability. Additionally, the cutting blade moves along a first direction under the constraint of a linear guide rail, ensuring that the cutting direction and depth remain constant, further enhancing cutting stability. During cutting, the cutting blade can create a guide cut on the surface of the capillary while simultaneously applying tangential force, allowing the capillary to automatically split along the guide cut. This cutting method meets the requirements for cross-sectional flatness and integrity after capillary cutting. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of a capillary cutting fixture (with the second limiting member in a locked state) provided according to some embodiments of this application; Figure 2 This is a three-dimensional structural diagram of a capillary cutting fixture (with the second limiting member in an open state) provided according to some embodiments of this application; Figure 3 This is a schematic diagram of a capillary cutting fixture cutting a capillary according to some embodiments of this application; Figure 4 This is a cross-sectional view and enlarged view of a cutting blade cutting a capillary tube according to some embodiments of this application; Figure 5 This is a schematic diagram of the force during the cutting and fracture of a capillary tube according to some embodiments of this application; Figure 6 This is a schematic diagram of a cutting blade cooperating with a fixing plate in an adjustment assembly according to some embodiments of this application; Figure 7This is a top view schematic diagram of a cutting blade provided according to some embodiments of this application; Figure 8 This is a bottom view of a fixing plate according to some embodiments of this application; Figure 9 This is a schematic diagram of an adjustment structure between a fixing plate and an adjusting seat according to some embodiments of this application; Figure 10 This is a schematic diagram of another adjustment structure between the fixing plate and the adjusting seat according to some embodiments of this application; Figure 11 This is a schematic diagram of a structure in which an adjustment seat is adsorbed and fixed to the left shell wall according to some embodiments of this application; Figure 12 This is a schematic diagram of a structure in which an adjustment seat is adsorbed and fixed to the right shell wall according to some embodiments of this application; Figure 13 This is a comparison image of the capillary cutting effect.

[0028] The attached figures are labeled as follows: 1-Base, 11-First shell, 111-Top shell wall, 1111-Second slot, 112-Left shell wall, 1121-First magnet, 113-Right shell wall, 1131-Second magnet, 114-Front shell wall, 1141-First slot, 115-Rear shell wall, 12-Second shell, 121-Protective plate; 2-Limiting mechanism, 21-First limiting component, 211-Through hole, 212-First guide surface, 22-Second limiting component, 221-Blind hole, 222-Second guide surface, 223-Cleaning groove, 23-Pin, 24-Third magnet; 3-Cutting mechanism, 31-Cutting blade, 311-Blade edge, 311a-Blade peak, 311b-Blade edge, 312-Groove structure, 312a-Second positioning surface, 313-First limiting surface, 32-Adjusting component, 321-Fixing plate, 3211-Protrusion structure, 3211a-First positioning surface, 3212-Second limiting surface, 3213-Sliding block, 3214-Second screw hole, 322-Adjusting seat, 3221-Slide groove, 3222-First screw hole, 3223-Scale line, 33-Linear guide rail, 331-Slide rail, 332-Slider, 34-Driver, 341-Connecting rod, 342-Handle, 35-Fastener, 36-Setting screw, 37-Bolt; 4-Capillary, 41-Guide slit, L-Cutting length; X - First direction, Y - Second direction, Z - Third direction. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.

[0030] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0031] In related technologies, capillaries are a core component of microfluidics and are widely used in various microfluidic scenarios. Their structure consists of a quartz inner tube and a surface resin polymer. These capillaries have extremely small outer diameters (usually less than 0.5 mm), and the quartz inner tubes are rigid, easily broken and clogged, and require extremely high cross-sectional flatness, which brings many challenges to cutting and processing.

[0032] Conventional cutting tools (such as scissors and utility knives) cannot produce cross-sections that meet usage requirements, necessitating secondary cutting. Furthermore, the capillary tips are prone to clogging during long-term use, also requiring trimming. Currently, the industry largely employs manual cutting of ceramic sheets. This method suffers from drawbacks such as inconsistent operation, poor cutting stability, insufficient cross-sectional flatness, and easy breakage of the quartz tube, making it unsuitable for the evolving needs of microfluidic technology.

[0033] Currently, the microfluidics industry is entering a stage of rapid industrialization, evolving towards intelligence, automation, and integration, which places higher demands on the processing precision, efficiency, and large-scale supply of capillaries. In the future, with the deepening of technological integration, the application scenarios of capillaries will be further enriched, and precision cutting will become mainstream, helping microfluidics technology to achieve industrialization in high-end fields.

[0034] To address the aforementioned problems, embodiments of this application provide a capillary cutting fixture, including a base and a limiting mechanism and a cutting mechanism integrated on the base. The limiting mechanism is primarily used for capillary clamping and stabilization; the cutting mechanism includes a cutting blade, an adjusting assembly, a linear guide rail, and a driving component. The cutting blade is mounted on the linear guide rail via the adjusting assembly, and the linear guide rail is connected to the base. The driving component can drive the cutting blade to move along a first direction under the constraint of the linear guide rail. During cutting, the cutting blade can cut a guide slit on the surface of the capillary's cutting area, while simultaneously applying a tangential force to the capillary, enabling it to separate along the guide slit and complete the cutting. This solution satisfies the requirements for cross-sectional flatness and integrity after capillary cutting and effectively improves the problem of cutting instability.

[0035] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings. The technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0036] like Figures 1 to 5 As shown, an embodiment of this application provides a capillary cutting fixture, including a base 1, a limiting mechanism 2, and a cutting mechanism 3. The limiting mechanism 2 is connected to the base 1 and is configured to clamp the capillary tube 4 and form a cutting space that exposes the cutting area of ​​the capillary tube 4. The cutting mechanism 3 includes a cutting blade 31, an adjustment assembly 32, a linear guide rail 33, and a driving member 34. The cutting blade 31 is mounted on the linear guide rail 33 via the adjustment assembly 32. The linear guide rail 33 is connected to the base 1. The driving member 34 is configured to drive the cutting blade 31 to move along the first direction X under the constraint of the linear guide rail 33. During the movement along the first direction X, the cutting blade 31 passes through the cutting space and cuts a guide cut 41 on the surface of the cutting area of ​​the capillary tube 4. During the process of cutting the guide cut 41, the cutting blade 31 applies a tangential force to the capillary tube 4 along the second direction Y, so that the capillary tube 4 can be divided along the guide cut 41. The first direction X intersects the axial direction of the capillary tube 4, the second direction Y is perpendicular to the first direction X, and the second direction Y is also parallel to a certain radial direction in the capillary tube 4.

[0037] Understandably, the base 1 can be used as a carrier for the capillary tube 4 cutting fixture, integrating the limiting mechanism 2 and the cutting mechanism 3 together. The main function of the limiting mechanism 2 is to clamp the capillary tube 4 and maintain its stability during cutting. The cutting mechanism 3 serves as the execution unit for cutting the capillary tube 4, and can stably complete the cutting of the capillary tube 4.

[0038] In this embodiment, the cutting space of the limiting mechanism 2 can refer to a spatial region on the limiting mechanism 2. When the capillary 4 is clamped on the limiting mechanism 2, this spatial region can expose a section of the capillary 4 in its axial direction, allowing the cutting blade 31 to enter and cut the capillary 4. Moreover, when the cutting blade 31 passes through this spatial region, there will be no interference between the two. Correspondingly, the cutting area of ​​the capillary 4 can refer to a section of the capillary 4 in its axial direction, and this section of the structure is exposed within the cutting space.

[0039] In this embodiment, as Figure 4 and Figure 5As shown, the cutting blade 31 has a cutting edge 311. During the movement of the cutting blade 31 along the first direction X, the cutting edge 311 can contact the surface of the cutting area of ​​the capillary 4. The cutting edge 311 applies a total force to the capillary 4. One component of the total force can be radial pressure, which refers to the force applied to the capillary 4 along its radial direction. The radial pressure can be applied along the first direction X to directly cut out the guide cut 41. The other component of the total force can be a tangential force applied along the second direction Y, which is responsible for causing the capillary 4 to break off along the guide cut 41. The surface of the cutting area of ​​the capillary 4 in contact with the cutting edge 311 refers to the surface of the cutting area of ​​the capillary 4 facing the cutting blade 311. The guide cut 41 is an opening formed by the sliding blade 311 pressing and cutting on the capillary 4. The guide cut 41 occupies only a part of the space in the radial direction of the capillary 4 and will not completely penetrate the capillary 4. The guide cut 41 can be formed along the first direction X on the surface of the cutting area of ​​the capillary 4 facing the cutting blade 31.

[0040] Alternatively, the blade 311 can be a flat edge or a round edge.

[0041] Optionally, the first direction X can be a direction perpendicular to the axis of the capillary 4. This setting helps to improve the flatness of the cross-section after the capillary 4 is cut.

[0042] For example, a specific process of the cutting blade 31 cutting the capillary tube 4 can be described as follows: taking the structure of the capillary tube 4, which is composed of a quartz inner tube and a surface resin polymer, as an example, when cutting, the blade 311 of the cutting blade 31 cuts through the capillary tube 4, cuts through the surface resin polymer of the capillary tube 4, and leaves a guide cut 41 on the surface of the quartz inner tube facing the cutting blade 31. At the same time, the blade 311 applies a tangential force to the quartz inner tube along the tangential direction of the outer periphery of the quartz inner tube, which can cause the quartz inner tube to break and separate along the guide cut 41, thus completing the division of the capillary tube 4.

[0043] In this embodiment, as Figure 3 As shown, the adjustment component 32 can serve as a connector between the cutting blade 31 and the linear guide rail 33. In addition, the adjustment component 32 can also be used to adjust the relative position between the cutting blade 31 and the capillary tube 4 to change the cutting depth of the guide slit 41.

[0044] In this embodiment, as Figure 3As shown, an exemplary structure of the linear guide 33 and its assembly relationship with the adjustment component 32 can be as follows: The linear guide 33 may include a matching slide rail 331 and a slider 332. The slide rail 331 can extend along the first direction X and be arranged on the base 1. The slider 332 is inserted into the slide rail 331 and is constrained by the slide rail 331. The slider 332 can only slide back and forth along the first direction X on the slide rail 331. The adjustment component 32 can be fixedly connected to the slider 332, so that the adjustment component 32 and the cutting blade 31 on it can move along the first direction X under the constraint of the linear guide 33.

[0045] In this embodiment, the main function of the drive member 34 is to drive the cutting blade 31 to move along the first direction X. The connection between the drive member 34 and other components in the cutting mechanism 3 is sufficient to meet the usage requirements, and this embodiment does not limit this. For example, the drive member 34 can be directly connected to the adjustment component 32; or, the drive member 34 can be directly connected to the cutting blade 31; or, the drive member 34 can be directly connected to the slider 332 of the linear guide rail 33.

[0046] It should be noted that the drive component 34 can be either a manual drive structure or an automatic drive structure. When the drive component 34 is an automatic drive structure, it needs to be used in conjunction with a power mechanism. The output end of the power mechanism can be connected to the drive component 34 to drive the drive component 34 to move along the first direction X.

[0047] In the above technical solution, the limiting mechanism 2 and the cutting mechanism 3 are integrated together through the base 1, which makes the overall fixture miniaturized and lightweight and easy to carry. Moreover, the limiting mechanism 2 can clamp and fix the capillary tube 4, which can keep the capillary tube 4 stable during cutting and help improve cutting stability. In addition, the cutting blade 31 moves along the first direction X under the restriction of the linear guide rail 33, which can keep the cutting direction and cutting depth of the cutting blade 31 unchanged during cutting, which helps to further improve cutting stability. Furthermore, during the cutting process, the cutting blade 31 can cut a guide cut 41 on the surface of the capillary tube 4, and at the same time apply a tangential force to the capillary tube 4, so that the capillary tube 4 can be automatically divided along the guide cut 41. This cutting method can meet the requirements of cross-sectional flatness and integrity after the capillary tube 4 is cut.

[0048] In some embodiments, such as Figure 4 and Figure 7 As shown, the cutting blade 31 has a blade edge 311 extending along the first direction X for cutting to form a guide cut 41; wherein, a local structure of the blade edge 311 protrudes along the second direction Y toward the capillary 4 to form a blade peak 311a, the blade peak 311a is smoothly connected to both ends of the blade edge 311 in the first direction X, and the blade peak 311a protrudes along the second direction Y from both ends of the blade edge 311 in the first direction X.

[0049] It is understandable that the cutting blade 31 has two main functions: first, to cut a guide cut 41 on the capillary tube 4; and second, to provide tangential force for the segmentation of the capillary tube 4. For this purpose, a cutting edge 311a structure can be provided on the cutting edge 311 of the cutting blade 311. During cutting, the portion of the cutting edge 311 located on the side of the cutting edge 311a along the first direction X first contacts and cuts the capillary tube 4, at which point the cut depth on the capillary tube 4 is relatively shallow. As the cutting blade 31 continues to move, the cutting edge 311a gradually cuts into the capillary tube 4, and the cut depth gradually increases. Until the cutting edge 311a slides out of the capillary tube 4, a complete guide cut 41 is formed on the capillary tube 4. In this process, the guide cut 41 is gradually formed from shallow to deep, which helps to reduce cutting impact, avoids problems such as chipping and breakage of the quartz inner tube in the capillary tube 4 due to excessive instantaneous force, and improves the forming accuracy and cross-sectional flatness of the guide cut 41.

[0050] At the same time, such as Figure 5 As shown, during the process of the cutting edge 311a gradually cutting into and passing through the capillary 4, the cutting blade 31 applies radial pressure to the capillary 4 and forms a tangential force along the second direction Y on the capillary 4. This tangential force can cause stress concentration in the capillary 4 along the guide cut 41 and achieve automatic separation, thereby simultaneously completing the formation of the guide cut 41 and the separation of the capillary 4 in one cutting action, improving cutting stability and processing efficiency.

[0051] It should be noted that the blade tip 311a protrudes from both ends of the blade 311 in the first direction X along the second direction Y. This structural design allows the cutting blade 31 to complete a cutting action by moving in a single direction, which helps to improve work efficiency.

[0052] Furthermore, the blade 311 has a curved cutting edge that protrudes from the center.

[0053] The middle part of the blade 311 can be understood as any part of the blade 311 located between its two ends in the first direction X. Thus, the cutting edge 311a in the arc-shaped cutting edge only needs to be located between the two ends of the blade 311 in the first direction X, and does not need to be in the center of the arc-shaped cutting edge.

[0054] Alternatively, such as Figure 4 and Figure 7 As shown, the blade 311 includes two cutting edges 311b, and the junction of the two cutting edges 311b forms a cutting edge 311a.

[0055] The two cutting edges 311b can be symmetrical or asymmetrical, and can be straight or curved.

[0056] Of course, the specific shape of the blade 311 described above is only used as an example. The specific structure of the blade 311 can also be designed according to product requirements. The embodiments of this application are not particularly limited in this regard.

[0057] Furthermore, such as Figures 3 to 8 As shown, the cutting blade 31 has a plate-like structure, and multiple cutting edges 311 are formed around its outer periphery in the thickness direction. The cutting blade 31 is detachably mounted and fixed on the adjustment assembly 32 by fasteners 35 so that the multiple cutting edges 311 can be switched to the working position in turn. The cutting edge 311 in the working position can cut the capillary tube 4 during the movement of the cutting blade 31 along the first direction X.

[0058] Optionally, such as Figure 4 and Figure 7 As shown, multiple blades 311 can be arranged end to end around the outer periphery of the cutting blade 31; or, at least two adjacent blades 311 can be arranged at intervals on the outer periphery of the cutting blade 31.

[0059] Optionally, the structures of the multiple blades 311 may be identical or inconsistent.

[0060] For example, the orthographic projection of the cutting blade 31 in its thickness direction can be a regular polygon; for example, such as Figure 4 As shown, the regular polygon can be a regular 24-sided polygon, so that the cutting blade 31 can be a 24-sided cutting blade, that is, the cutting blade 31 can have 24 blades 311, and the structure of each blade 311 is the same.

[0061] Alternatively, fastener 35 may be a screw.

[0062] It is understandable that the working position is the relative position of one of the blades 311 in the cutting blade 31 after it is fixed with the adjustment component 32 relative to the adjustment component 32; during the movement of the cutting blade 31 along the first direction X, the position of the blade 311 in the working position in space is changing.

[0063] It should be noted that the cutting blade 31 is equipped with multiple blades 311, and the multiple blades 311 can switch to the working position in turn, which can extend the service life of the cutting blade 31.

[0064] Furthermore, the cutting blade 31 is provided with a first positioning part; the adjusting assembly 32 is provided with a second positioning part; one of the first positioning part and the second positioning part is a protrusion structure 3211, and the other is a slot structure 312. The protrusion structure 3211 can be embedded in the slot structure 312 to limit the distance between the blade 311 in the working position and the cutting area of ​​the capillary 4 in the second direction Y.

[0065] The cutting blade 31 and the adjustment component 32 can be positioned first using the protrusion structure 3211 and the slot structure 312, and then the cutting blade 31 and the adjustment component 32 can be locked using the fastener 35.

[0066] For example, such as Figure 3 , Figures 6 to 8 As shown, one assembly method of the cutting blade 31 and the adjusting component 32 is as follows: the cutting blade 31 forms a slot structure 312 through its center along its own thickness direction, the adjusting component 32 is provided with a protrusion structure 3211, the fastener 35 is a screw, the cutting blade 31 can be sleeved on the protrusion structure 3211 through the slot structure 312, and then the screw passes through the slot structure 312 and connects with the protrusion structure 3211 to lock and fix the cutting blade 31 on the adjusting component 32.

[0067] Optionally, such as Figure 3 and Figure 6 As shown, the protrusion structure 3211 and the slot structure 312 are a matching interlocking structure; wherein, the cross-sectional shape of the protrusion structure 3211 and / or the slot structure 312 can be circular, polygonal or other irregular shape.

[0068] Furthermore, such as Figures 6 to 8 As shown, the protruding structure 3211 has multiple first positioning surfaces 3211a formed in its circumferential direction, and the number of first positioning surfaces 3211a is the same as the number of cutting edges 311; the slot structure 312 has multiple second positioning surfaces 312a formed in its circumferential direction, and the number of second positioning surfaces 312a is the same as the number of first positioning surfaces 3211a; wherein, any one of the first positioning surfaces 3211a can alternately cooperate with each of the second positioning surfaces 312a, so that each cutting edge 311 can alternately switch to the working position.

[0069] For example, in order to ensure that the multiple first positioning surfaces 3211a and the multiple second positioning surfaces 312a can be positioned alternately, one way of cooperating between the protrusion structure 3211 and the slot structure 312 is that the cross-sectional shapes of the protrusion structure 3211 and the slot structure 312 are consistent, and the cross-sectional shapes of both are regular polygons.

[0070] Optionally, the first positioning part (protrusion structure 3211 or groove structure 312) is located at the center of the cutting blade 31; thus, each blade 311 can be accurately switched to the working position in turn.

[0071] In some embodiments, such as Figure 4As shown, the distance between the two points furthest apart in the second direction Y of the guide cut 41 is the cutting depth d, and the diameter of the capillary 4 is D. d and D satisfy: 0.25D < d < 0.4D. For example, the value of d can be 0.26D, 0.28D, 0.3D, 0.33D, 0.35D, 0.38D, 0.4D, etc.

[0072] Furthermore, the value of the cutting depth d is one-third of the value of the diameter D of the capillary 4.

[0073] It should be noted that the cutting depth d of the guide cut 41 is closely related to whether the capillary tube 4 can be brittlely fractured or the flatness of the fractured section. When the cutting depth d is too small, for example, d is less than one-quarter of the D value, the guide cut 41 is shallow. Consequently, the tangential force applied by the cutting blade 31 to the capillary tube 4 is insufficient, resulting in insufficient stress concentration along the guide cut 41, which prevents the capillary tube 4 from brittlely fractured. When the cutting depth d is too large, for example, d is greater than half of the D value, the cutting impact on the capillary tube 4 is greater. The quartz inner tube in the capillary tube 4 may experience edge chipping or breakage due to excessive instantaneous force, affecting the flatness of the capillary tube 4 cross-section. Therefore, by limiting the range of the cutting depth d of the guide cut 41 relative to the diameter D of the capillary tube 4, the probability of successful brittle fracture of the capillary tube 4 and the flatness of the capillary tube 4 cross-section after brittle fracture can be improved.

[0074] Of course, besides the cutting depth d of the guide slit 41, the inner and outer diameters of the capillary 4, the rigidity of the material, and its toughness will also affect whether the capillary 4 can be brittle or the flatness after brittle fracture. Therefore, considering the above factors, the range of values ​​for the cutting depth d can be adaptively adjusted, and the embodiments of this application do not particularly limit this.

[0075] In some embodiments, such as Figure 3 As shown, the adjustment component 32 is configured to adjust the distance between the cutting blade 31 and the cutting area of ​​the capillary 4 in the second direction Y, so as to adjust the cutting depth of the guide cut 41.

[0076] It should be noted that, due to the cutting action of the cutting blade 31 on the capillary 4, the cutting blade 31 needs to be able to cut into the surface of the capillary 4. Based on this, adjusting the distance between the cutting area of ​​the cutting blade 31 and the capillary 4 in the second direction Y can be understood as adjusting the depth of the cutting blade 31 extending into the capillary 4, thereby adjusting the cutting depth of the guide cut 41.

[0077] Specifically, such as Figure 3As shown, the adjustment assembly 32 includes a fixing plate 321 and an adjustment seat 322. The fixing plate 321 is used to mount and fix the cutting blade 31; the adjustment seat 322 is connected between the fixing plate 321 and the linear guide rail 33, and the fixing plate 321 is adjustablely fixed on the adjustment seat 322 in the second direction Y.

[0078] Optionally, such as Figure 3 , Figures 6 to 8 As shown, the cutting blade 31 has a first limiting surface 313; the fixing plate 321 has a second limiting surface 3212; the first limiting surface 313 and the second limiting surface 3212 abut against each other along the third direction Z; wherein, the third direction Z is the axial direction of the capillary 4. In this way, through the limiting cooperation of the first limiting surface 313 and the second limiting surface 3212, the cutting blade 31 can be positioned and assembled on the fixing plate 321, which can not only improve the assembly efficiency, but also make the position of the cutting blade 31 in the third direction Z accurate, so that the cutting blade 31 can be aligned with the cutting space of the limiting mechanism 2 and can accurately cut the cutting area of ​​the capillary 4.

[0079] Optionally, such as Figure 6 As shown, the cutting blade 31 has a plate-like structure, and the first limiting surface 313 is the plate surface of the cutting blade 31 facing the fixing plate 321, and the first limiting surface 313 is perpendicular to the thickness direction of the cutting blade 31.

[0080] Optionally, such as Figure 6 As shown, the second limiting surface 3212 is the plate surface on the fixed plate 321 facing the cutting blade 31, and the second limiting surface 3212 is perpendicular to the thickness direction of the fixed plate 321.

[0081] It should be noted that the cutting blade 31 is connected to the adjusting seat 322 via the fixing plate 321, and the fixing plate 321 and the adjusting seat 322 are adjustable in the second direction Y. This allows the position of the cutting blade 31 to be adjusted in the second direction Y. This allows the adjustment structure to be designed between the fixing plate 321 and the adjusting seat 322 without affecting the structural design of the cutting blade 31, making the specific structure of the cutting blade 31 more conducive to cutting the capillary tube 4.

[0082] For example, such as Figure 9As shown, an adjustment structure between the fixed plate 321 and the adjusting seat 322 can be: the adjustment structure includes a slide groove 3221, a sliding block 3213, and a set screw 36. The slide groove 3221 can extend along the second direction Y and be disposed on the adjusting seat 322. The sliding block 3213 can be part of the fixed plate 321. The sliding block 3213 is assembled into the slide groove 3221 and can only slide along the second direction Y under the restriction of the slide groove 3221. The set screw 36 can be threaded to the adjusting seat 322 and can pass through the adjusting seat 322 and abut against the sliding block 3213. By adjusting the set screw 36, the sliding block 3213 can be pressed against the groove wall of the slide groove 3221 to fix the fixed plate 321 on the adjusting seat 322. Correspondingly, by adjusting the set screw 36, the sliding block 3213 can also be loosened so that the sliding block 3213 can move in the slide groove 3221 to adjust the position of the cutting blade 31 in the second direction Y. After the position is determined, the set screw 36 can be tightened. In order to improve the accuracy of the adjustment, a scale line 3223 can be set along the second direction Y in the corresponding part between the fixed plate 321 and the adjusting seat 322.

[0083] Of course, in addition to the stepless adjustment achievable by the specific structures mentioned above, the adjustment structure can also be designed with gradient multi-level adjustment. For example, ... Figure 10 As shown, the adjustment structure includes multiple equally spaced first screw holes 3222, multiple equally spaced second screw holes 3214, and bolts 37. The spacing between any two adjacent first screw holes 3222 is the same as the spacing between any two adjacent second screw holes 3214. The multiple first screw holes 3222 can be arranged in a row along the second direction Y on the adjustment seat 322, and the multiple second screw holes 3214 can be arranged in a row along the second direction Y on the fixing plate 321. The multiple first screw holes 3222 and the multiple second screw holes 3214 can be aligned one-to-one, and the bolts 37 are used to lock the corresponding first screw holes 3222 and second screw holes 3214, thereby locking the fixing plate 321 and the adjustment seat 322. When it is necessary to adjust the position of the cutting blade 31 in the second direction Y, the alignment between at least some of the first screw holes 3222 and different second screw holes 3214 can be adjusted, and the bolts 37 are used to lock the corresponding first screw holes 3222 and second screw holes 3214.

[0084] Optionally, such as Figure 3 As shown, the adjusting seat 322 can be designed as a bent plate; for example, the adjusting seat 322 can be an L-shaped plate. The design of the adjusting seat 322 as a bent plate can improve the structural strength of the adjusting seat 322 on the one hand, and on the other hand, some components of the cutting mechanism 3 (such as the fixing plate 321, the cutting blade 31, etc.) can be arranged on its inner side to save layout space.

[0085] In some embodiments, such as Figures 1 to 3As shown, the base 1 is a shell structure. The shell wall of the base 1 is provided with a first slot 1141 and a second slot 1111. Both the first slot 1141 and the second slot 1111 extend along the first direction X. The cutting blade 31 can pass through the first slot 1141 and move along the first direction X. The driving member 34 can pass through the second slot 1111 and move along the first direction X. The adjusting component 32 and the linear guide rail 33 are disposed inside the base 1. The limiting mechanism 2 is disposed on the outer wall of the base 1, and the cutting space formed on the limiting mechanism 2 corresponds to the first slot 1141 in the second direction Y.

[0086] For example, such as Figures 1 to 3 As shown, a specific structure of the base 1 can be: the base 1 is divided into a detachable first shell 11 and a second shell 12, which together define the internal cavity of the base 1. The first shell 11 can be a cuboid shell structure with a bottom opening. The cuboid shell structure can include a top shell wall 111 and left shell wall 112, right shell wall 113, front shell wall 114, and rear shell wall 115 surrounding one side of the top shell wall 111 in its thickness direction. The left shell wall 112 and right shell wall 113 are arranged opposite each other along a first direction X, the front shell wall 114 and rear shell wall 115 are arranged opposite each other along a second direction Y, and the top shell wall 111 and the bottom opening are arranged opposite each other along a third direction Z. The second shell 12 can be a plate structure, which can cover the bottom opening of the first shell 11, and the two can be locked together with screws.

[0087] Optionally, such as Figure 1 and Figure 2 As shown, the first slot 1141 can be provided on the front shell wall 114 of the first housing 11, and the second slot 1111 can be provided on the top shell wall 111 of the first housing 11. In this way, an appropriate safe distance can be maintained between the drive member 34 and the cutting blade 31, which helps to improve the safety during operation.

[0088] Optionally, such as Figure 3 As shown, the linear guide 33 is located inside the receiving cavity and can be mounted on the rear shell wall 115.

[0089] Optionally, such as Figure 3 As shown, the adjustment component 32 is located inside the receiving cavity and can be connected to the linear guide rail 33 on the side opposite to the rear shell wall 115.

[0090] Optionally, such as Figure 3As shown, the cutting blade 31 has a plate-like structure, and its thickness direction can be parallel to the axial direction of the capillary tube 4. Most of the structure of the cutting blade 31 can be placed inside the receiving cavity, and the cutting edge 311 of the cutting blade 31 can extend through the first slot 1141 to a working position outside the base 1. Thus, in the working state, most of the structure of the cutting blade 31 can be located inside the base 1, which can reduce the impact of dust and other impurities from outside the base 1 on the cutting blade 31 and extend its service life.

[0091] It should be noted that a certain gap space needs to be maintained between the edge of the first groove 1141 in the thickness direction of the cutting blade 31 and the cutting blade 31. This gap space can serve two purposes: first, during the movement of the cutting blade 31 along the first direction X, there will be no interference between the cutting blade 31 and the first groove 1141; second, when assembling or disassembling the cutting blade 31, the gap space can provide assembly space, facilitating the assembly or disassembly of the cutting blade 31.

[0092] Optionally, the drive unit 34 can be a manually driven structure.

[0093] For example, such as Figures 1 to 3 As shown, a specific structure of the driving component 34 can be: the driving component 34 includes a connecting rod 341 and a handle 342. The connecting rod 341 passes through the second slot 1111, one end of the connecting rod 341 is connected to the adjusting seat 322 of the adjusting assembly 32, and the other end of the connecting rod 341 is placed outside the base 1 and connected to the handle 342. Manually driving the handle 342 can cause the connecting rod 341 to slide along the second slot 1111, and cause the adjusting assembly 32 to slide under the constraint of the linear guide rail 33, so that the cutting blade 31 fixed on the adjusting assembly 32 can pass through the first slot 1141 and move along the first direction X to complete the cutting action.

[0094] It should be noted that the operator can push the handle 342 to move the cutting blade 31 from one end of the first groove 1141 to the other end. During this stroke, the cutting blade 31 can perform a cutting action when it slides to the middle position. Moreover, the cutting action only needs to be performed once to complete the cutting of the capillary 4. There is no need to slide back and forth for cutting multiple times, and there is no requirement for the direction of sliding.

[0095] Optionally, such as Figure 1 and Figure 2 As shown, the limiting mechanism 2 is located outside the base 1 and can be set on the front shell wall 114 of the first shell 11. In this way, the cutting space on the limiting mechanism 2 can be conveniently set to correspond with the first slot 1141, and a certain distance can be maintained between the limiting mechanism 2 and the driving member 34, providing more operating space for clamping the capillary tube 4 and facilitating operation.

[0096] Furthermore, a locking unit is provided between the shell wall of the substrate 1 and the cutting mechanism 3; the cutting blade 31 can reciprocate between the first position and the second position along the first direction X under the drive of the driving member 34; when the cutting blade 31 is in the first position and / or the second position, the position of the cutting blade 31 can be locked under the action of the locking unit.

[0097] Specifically, such as Figure 1 and Figure 2 As shown, the locking unit includes a first magnet 1121 and a second magnet 1131; the base 1 has a first shell wall and a second shell wall disposed opposite to each other in a first direction X; the cutting mechanism 3 has a first contact surface facing the first shell wall and a second contact surface facing the second shell wall; the first magnet 1121 is disposed on one of the first shell wall and the first contact surface, and the second magnet 1131 is disposed on one of the second shell wall and the second contact surface; when the cutting blade 31 is in the first position, under the attraction of the first magnet 1121, the first contact surface is fixed to the first shell wall, so that the cutting blade 31 can be locked in the first position; when the cutting blade 31 is in the second position, under the attraction of the second magnet 1131, the second contact surface is fixed to the second shell wall, so that the cutting blade 31 can be locked in the second position.

[0098] For example, such as Figure 11 and Figure 12 As shown, one possible installation method for the locking unit between the base 1 and the cutting mechanism 3 is as follows: the first shell wall can be the left shell wall 112, the second shell wall can be the right shell wall 113, the first contact surface can be the surface of the adjusting seat 322 in the adjusting assembly 32 facing the left shell wall 112, and the second contact surface can be the surface of the adjusting seat 322 in the adjusting assembly 32 facing the right shell wall 113; the first magnet 1121 is disposed on the left shell wall 112, the second magnet 1131 is disposed on the right shell wall 113, and the material of the adjusting seat 322 is a ferromagnetic material that can be attracted and fixed by a magnet (or, components made of ferromagnetic material are disposed on the first contact surface and the second contact surface to cooperate with the first magnet 1121 and the second magnet 1131). When the adjusting seat 322 is located at the leftmost position within the receiving cavity, the first magnet 1121 can attract and fix the adjusting seat 322 to the left shell wall 112. At this time, the cutting blade 31 is in the first position and locked in the first position. Then, by holding the driving member 34 and applying force, the adjusting seat 322 can be disengaged from the left shell wall 112 and moved towards the right shell wall 113. When the adjusting seat 322 is located at the rightmost position within the receiving cavity, the second magnet 1131 can attract and fix the adjusting seat 322 to the right shell wall 113. At this time, the cutting blade 31 is in the second position and locked in the second position. Similarly, by holding the driving member 34 and applying force, the adjusting seat 322 can also be disengaged from the right shell wall 113.

[0099] In the above technical solution, by setting a locking unit, the cutting blade 31 can be temporarily locked to the shell wall of the base 1 to prevent the cutting blade 31 from moving in the non-working state, thereby causing safety problems; moreover, the locking state of the cutting blade 31 can be released by applying a certain force to the driving member 34, which has the characteristics of simple and reasonable structure and convenient operation.

[0100] Furthermore, such as Figures 1 to 3 As shown, a protective plate 121 is provided on the substrate 1; the protective plate 121 protrudes from the substrate 1 along the second direction Y and is located on the side of the limiting mechanism 2 in the third direction Z; wherein, the third direction Z is the axial direction of the capillary 4.

[0101] It should be noted that the protective plate 121 can be a separate structure independent of the substrate 1, or it can be set as part of the substrate 1.

[0102] For example, such as Figure 3 As shown, the protective plate 121 can be part of the structure of the second housing 12, and the protective plate 121 and other parts of the second housing 12 can be integrally formed into a complete second housing 12. The scope of the protective plate 121 can be defined as follows: in the second direction Y, the structure of the second housing 12 that extends beyond the first housing 11 can be understood as the protective plate 121.

[0103] In the above technical solution, the protective plate 121 can shield one side of the limiting mechanism 2, which can play a certain protective role against the impact of the limiting mechanism 2.

[0104] In some embodiments, such as Figures 1 to 3 As shown, the limiting mechanism 2 includes a first limiting member 21 and a second limiting member 22; the first limiting member 21 is provided with a through hole 211, and the second limiting member 22 is provided with a blind hole 221, which can be coaxially arranged with the through hole 211; wherein, the capillary tube 4 can pass through the through hole 211 and be inserted to the bottom of the blind hole 221.

[0105] Optionally, the first limiting member 21 and the second limiting member 22 can be locked to the base 1 by bolt assembly, or can be movably installed on the base 1 by magnetic attraction or other means. The first limiting member 21 and the base 1, and the second limiting member 22 and the base 1 can use the same or different connection methods.

[0106] Optionally, such as Figure 1 and Figure 2As shown, both the first limiting member 21 and the second limiting member 22 can be generally elongated block structures, and both can extend along the first direction X, and can also be respectively arranged on both sides of the first slot 1141 along the third direction Z. Thus, the first limiting member 21 and the second limiting member 22 can also serve as protective structures for the cutting blade 31, reducing the risk of damage to the cutting blade 31 due to impacts.

[0107] Optionally, the first limiting member 21 and the second limiting member 22 are spaced apart, and the gap between them forms a cutting space.

[0108] For example, such as Figure 3 As shown, the first limiting member 21 and the second limiting member 22 can be arranged vertically opposite each other, with the first limiting member 21 located above the second limiting member 22. The axial directions of the coaxially arranged blind hole 221 and through hole 211 can be parallel to the third direction Z. Thus, after the tooling fixture in this embodiment is placed on a flat surface, the capillary tube 4 can be inserted from top to bottom into the blind hole 221 through the through hole 211. Under the combined constraint of the through hole 211 and the blind hole 221, the capillary tube 4 can be vertically clamped onto the limiting mechanism 2. In this case, the axial direction (third direction Z) of the capillary tube 4 can be understood as the vertical direction.

[0109] It should be noted that, as Figure 3 As shown, the blind hole 221 has a bottom surface opposite its opening, which can serve as a limiting bottom surface. When the capillary tube 4 is inserted into the bottom of the blind hole 221, the limiting bottom surface positions the capillary tube 4 in the third direction Z; once the position of the limiting bottom surface in the third direction Z is determined, the cutting length L of the capillary tube 4 can be limited. Therefore, by adjusting the position of the limiting bottom surface in the third direction Z, the cutting length L of the capillary tube 4 can be changed. For example, the cutting length L can be flexibly set by replacing the second limiting member 22 with a blind hole 221 of different depths. In this embodiment, the cutting length L of the capillary tube 4 can be set to 3 mm.

[0110] Optionally, such as Figure 3 As shown, the diameter of the through hole 211 matches the outer diameter of the capillary 4. This allows the capillary 4 to be stably confined on the first limiting member 21, reducing the radial wobble of the capillary 4 and improving the stability of the capillary 4 during cutting.

[0111] Optionally, such as Figure 3 As shown, the diameter of the blind hole 221 matches the outer diameter of the capillary 4. This allows the capillary 4 to be stably confined on the second limiting member 22, reducing the radial wobble of the capillary 4 and improving the stability of the capillary 4 during cutting.

[0112] Optionally, such as Figures 1 to 3As shown, a first guide surface 212 is provided at the end of the through hole 211 away from the second limiting member 22. The first guide surface 212 is configured to guide the capillary tube 4 into the through hole 211. In this way, the working efficiency can be improved, and the capillary tube 4 can be quickly filled into the through hole 211.

[0113] For example, such as Figure 3 As shown, the first guide surface 212 can be a conical structure that is wider at the top and narrower at the bottom.

[0114] Optionally, such as Figures 1 to 3 As shown, a second guide surface 222 is provided at one end of the blind hole 221 near the first limiting member 21. The second guide surface 222 is configured to guide the capillary tube 4 into the blind hole 221. In this way, the working efficiency can be improved, and the capillary tube 4 can be quickly filled into the blind hole 221.

[0115] For example, such as Figure 3 As shown, the second guide surface 222 can be a conical structure that is wider at the top and narrower at the bottom.

[0116] Optionally, the material of the first limiting member 21 and / or the second limiting member 22 includes, but is not limited to, one of polyetheretherketone, polytetrafluoroethylene, and polyoxymethylene. In this way, friction on the capillary 4 wall can be reduced during the process of the capillary 4 being filled into the through hole 211 and / or blind hole 221.

[0117] Furthermore, such as Figures 1 to 3 As shown, the second limiting member 22 is provided with a cleaning groove 223, which is connected to the blind hole 221 and located at the end of the blind hole 221 away from the first limiting member 21; at least part of the structure of the cleaning groove 223 is exposed on the outside of the second limiting member 22.

[0118] Understandably, after the capillary tube 4 is cut, most of the remaining material and residue cut off from the capillary tube 4 will remain in the blind hole 221, making it difficult to clean. Therefore, a cleaning groove 223 is provided on the second limiting member 22. The cleaning groove 223 is connected to the blind hole 221 and located at the end of the blind hole 221 away from the first limiting member 21, allowing the cleaning groove 223 to be connected to the bottom of the blind hole 221. In this way, the remaining material and residue in the bottom of the blind hole 221 can be easily cleaned out through the cleaning groove 223, preventing the remaining material and residue from getting stuck inside the blind hole 221.

[0119] Optionally, such as Figure 3 As shown, the cleaning groove 223 can penetrate the second limiting member 22 in a direction perpendicular to the Z-axis. This allows residual material and debris in the blind hole 221 to be cleaned out from multiple directions, helping to improve cleaning efficiency.

[0120] Optionally, the bottom surface of the cleaning groove 223 is flush with the bottom surface of the blind hole 221.

[0121] Furthermore, such as Figure 1 and Figure 2 As shown, the second limiting member 22 has a hinged end and a locking end. The hinged end is hinged to the base 1 via a pin 23, and the locking end is lockably connected to the base 1 in an openable manner. When the locking end is locked to the base 1, the blind hole 221 can be coaxially arranged with the through hole 211. When the locking end is opened, the second limiting member 22 can rotate around the pin 23 and can drive the cleaning groove 223 away from the base 1.

[0122] It should be noted that the second limiting member 22 is connected to the base 1 in an openable manner, which can move the cleaning groove 223 away from the base 1, so that the blind hole 221 of the second limiting member 22 can be moved to a larger operating space to facilitate the cleaning of residual material and residue in the blind hole 221; at the same time, it can also keep the operator away from the cutting blade 31 when cleaning residual material and residue, which helps to improve the safety of operation.

[0123] Optionally, the locking connection between the locking end of the second limiting member 22 and the base 1 can be a snap-fit ​​connection, a magnetic connection, etc.

[0124] For example, such as Figure 1 and Figure 2 As shown, one locking connection between the locking end of the second limiting member 22 and the base 1 can be as follows: a third magnet 24 is provided at the locking end, and the base 1 can be made of a ferromagnetic material (or, a component made of a ferromagnetic material can be provided on the base 1 at a position corresponding to the locking end to cooperate with the third magnet 24). When the locking end is close to the base 1, the third magnet 24 can be attracted and fixed to the base 1 to lock the locking end of the second limiting member 22 onto the base 1. When it is necessary to open the locking end, a certain force is applied to the locking end of the second limiting member 22 to disengage it from the base 1.

[0125] The following detailed description, in conjunction with the accompanying drawings, illustrates the specific implementation steps of a capillary cutting fixture according to this application, enabling those skilled in the art to clearly understand the working process and principle of this fixture.

[0126] I. Preparation steps before cutting Before the cutting operation, the second limiting member 22 is attached to the front shell wall 114 of the base 1 by the third magnet 24, ensuring that the through hole 211 of the first limiting member 21 and the blind hole 221 of the second limiting member 22 are coaxially arranged to ensure the positioning accuracy after the capillary tube 4 is inserted. Then, the capillary tube 4 is inserted into the through hole 211 and the blind hole 221 until the bottom surface of the blind hole 221. At this time, a preset gap (cutting space) is reserved between the first limiting member 21 and the second limiting member 22. The capillary tube 4 has a certain elasticity in the section corresponding to this gap, providing adaptation space for subsequent cutting and cutting fracture actions, such as... Figure 3 As shown.

[0127] II. Cutting Operation Steps During cutting, the driving cutting blade 31 quickly glides across the capillary 4, simultaneously completing the opening of the guide cut 41 and the cutting and breaking of the capillary 4. The specific process is as follows: (a) The process of opening the guide incision 41 The cutting blade 31 is adjusted to a specific cutting depth. When the cutting blade 31 contacts the capillary 4, its inclined cutting edge 311b first cuts through the resin polymer on the surface of the capillary 4, while simultaneously applying a certain tangential force to the capillary 4. As the cutting blade 31 continues to move along a preset direction (first direction X), under the action of the aforementioned tangential force, the capillary 4 undergoes adaptive bending and moves synchronously along the cutting edge 311b, ultimately forming an arc-shaped guide cut 41 on the surface of the capillary 4, such as... Figure 4 As shown.

[0128] (II) Capillary 4 Cutting and Fracture Process The aforementioned tangential force also drives the capillary 4 to cut and fracture. As the cutting blade 31 moves, the contact between the capillary 4 and the cutting edge 311a of the cutting blade 31 gradually deepens, the cutting force on the capillary 4 gradually increases, and the corresponding arc-shaped cut also expands. The structural strength of the capillary 4 gradually decreases and its brittleness increases. When the cutting force reaches a preset threshold, the capillary 4 completes the severance along the arc-shaped guide cut 41, achieving precise cutting and fracture. Figure 5 As shown.

[0129] It should be noted that the direction of the cutting force used in this fixture is opposite to that used in conventional manual cutting of the capillary tube 4. However, practical testing has verified that the flatness of the cross-section of the capillary tube 4 cut using this method fully meets the requirements for use in the microfluidics field under microscopic observation. Figure 13 As shown. Furthermore, this design integrates the slit opening and cutting / breaking actions into a single cutting process, eliminating the need for separate cutting / breaking actions and corresponding components. This results in a simpler overall structure and easier operation of the fixture, effectively improving cutting efficiency.

[0130] III. Cleaning steps after cutting After the cutting operation is completed, since the second limiting member 22 is attracted to the outer wall of the first shell 11 of the base 1 by the third magnet 24, the second limiting member 22 can be rotated to separate it from the first shell 11 of the base 1, thereby quickly cleaning up the waste generated during the cutting process. After cleaning, the second limiting member 22 can be re-attracted and fixed, and the next cutting operation can be carried out.

[0131] In the description of this application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this application. They are only for the convenience of describing this application and simplifying the description, 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.

[0132] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0133] In the description of this application, it should be noted that the terms "first", "second", "third", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0134] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0135] The present application has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present application based on these embodiments, all of which fall within the protection scope of the present application.

Claims

1. A capillary cutting fixture, characterized in that, include: Matrix; A limiting mechanism is connected to the base, and the limiting mechanism is configured to clamp the capillary and form a cutting space that exposes the cutting area of ​​the capillary. A cutting mechanism includes a cutting blade, an adjustment assembly, a linear guide rail, and a driving component. The cutting blade is mounted on the linear guide rail via the adjustment assembly. The linear guide rail is connected to the base. The driving component is configured to drive the cutting blade to move along a first direction under the constraint of the linear guide rail. During the movement of the cutting blade along the first direction, it passes through the cutting space and cuts a guide cut on the surface of the cutting area of ​​the capillary; and during the process of cutting the guide cut, the cutting blade applies a tangential force to the capillary along the second direction, so that the capillary can be divided along the guide cut. Wherein, the first direction intersects the axial direction of the capillary, the second direction is perpendicular to the first direction, and the second direction is also parallel to a certain radial direction in the capillary.

2. The capillary cutting fixture according to claim 1, characterized in that, The cutting blade has a cutting edge extending in a first direction for cutting to form the guide cut. The blade has a partial structure that protrudes towards the capillary along the second direction to form a blade peak. The blade peak is smoothly connected to both ends of the blade in the first direction, and the blade peak protrudes from both ends of the blade in the first direction along the second direction.

3. The capillary cutting fixture according to claim 2, characterized in that, The blade is a curved edge that protrudes from the center; or... The blade includes two cutting edges, and the junction of the two cutting edges forms the cutting edge peak.

4. The capillary cutting fixture according to claim 2, characterized in that, The cutting blade has a plate-like structure, and multiple cutting edges are formed around its outer periphery in the thickness direction; The cutting blade is detachably mounted and fixed to the adjustment assembly by fasteners, so that the multiple blades can be switched to the working position in turn; The blade in the working position is capable of cutting the capillary as the cutting blade moves along the first direction.

5. The capillary cutting fixture according to claim 4, characterized in that, The cutting blade is provided with a first positioning part; The adjustment component is provided with a second positioning part; One of the first positioning part and the second positioning part is a protruding structure, and the other is a slotted structure. The protruding structure can be embedded in the slotted structure to limit the distance between the cutting edge at the working position and the cutting area of ​​the capillary in the second direction.

6. The capillary cutting fixture according to claim 5, characterized in that, The protruding structure has a plurality of first positioning surfaces in its circumferential direction, and the number of the first positioning surfaces is the same as the number of the blades. The slotted structure has multiple second positioning surfaces formed in its circumferential direction, and the number of the second positioning surfaces is the same as the number of the first positioning surfaces. In this configuration, any one of the first positioning surfaces can alternately cooperate with each of the second positioning surfaces, so that each of the blades can alternately switch to the working position.

7. The capillary cutting fixture according to claim 1, characterized in that, The distance between the two points furthest apart in the second direction of the guide cut is the cutting depth d, and the diameter of the capillary is D. The d and D satisfy: 0.25D < d < 0.4D.

8. The capillary cutting fixture according to claim 1, characterized in that, The adjustment components include: A mounting plate is used to install and fix the cutting blade; An adjusting seat is connected between the fixed plate and the linear guide rail, and the fixed plate is fixedly fixed to the adjusting seat in an adjustable position in the second direction.

9. The capillary cutting fixture according to claim 8, characterized in that, The cutting blade has a first limiting surface; The fixing plate has a second limiting surface; The first limiting surface and the second limiting surface abut against each other along a third direction; Wherein, the third direction is the axial direction of the capillary.

10. The capillary cutting fixture according to claim 1, characterized in that, The substrate is a shell structure, and a first slot and a second slot are provided on the shell wall of the substrate. Both the first slot and the second slot extend along the first direction. The cutting blade can pass through the first slot and move along the first direction; The driving component can pass through the second slot and move along the first direction; The adjustment component and the linear guide rail are disposed inside the base; The limiting mechanism is disposed on the outer wall of the base, and the cutting space formed on the limiting mechanism corresponds to the first slot in the second direction.

11. The capillary cutting fixture according to claim 10, characterized in that, A locking unit is provided between the shell wall of the substrate and the cutting mechanism; The cutting blade, driven by the driving member, can reciprocate between the first position and the second position along the first direction; When the cutting blade is in the first position and / or the second position, the position of the cutting blade can be locked by the locking unit.

12. The capillary cutting fixture according to claim 11, characterized in that, The locking unit includes a first magnet and a second magnet; The substrate has a first shell wall and a second shell wall disposed opposite to each other in the first direction; The cutting mechanism has a first contact surface facing the first shell wall and a second contact surface facing the second shell wall; The first magnet is provided on one of the first shell wall and the first contact surface, and the second magnet is provided on one of the second shell wall and the second contact surface; When the cutting blade is in the first position, under the attraction of the first magnet, the first mating surface is fixed to the first shell wall, so that the cutting blade can be locked in the first position; When the cutting blade is in the second position, the second mating surface is fixed to the second shell wall under the attraction of the second magnet, so that the cutting blade can be locked in the second position.

13. The capillary cutting fixture according to any one of claims 10-12, characterized in that, A protective plate is provided on the substrate; The protective plate protrudes from the base along the second direction and is located on the side of the limiting mechanism facing the third direction; Wherein, the third direction is the axial direction of the capillary.

14. The capillary cutting fixture according to claim 1, characterized in that, The limiting mechanism includes a first limiting component and a second limiting component; The first limiting member is provided with a through hole, and the second limiting member is provided with a blind hole, wherein the blind hole can be coaxially arranged with the through hole; The capillary tube can penetrate the through hole and be inserted to the bottom of the blind hole.

15. The capillary cutting fixture according to claim 14, characterized in that, The diameter of the through hole and / or the diameter of the blind hole are matched with the outer diameter of the capillary.

16. The capillary cutting fixture according to claim 14, characterized in that, A first guide surface is provided at the end of the through hole away from the second limiting member, and the first guide surface is configured to guide the capillary into the through hole; and / or A second guide surface is provided at one end of the blind hole near the first limiting member, and the second guide surface is configured to guide the capillary into the blind hole.

17. The capillary cutting fixture according to claim 14, characterized in that, The second limiting member is provided with a cleaning groove, which is connected to the blind hole and located at the end of the blind hole away from the first limiting member; At least a portion of the cleaning groove is exposed outside the second limiting member.

18. The capillary cutting fixture according to claim 17, characterized in that, The second limiting member has a hinge end and a locking end. The hinge end is hinged to the base body via a pin, and the locking end is detachably locked to the base body. When the locking end is locked onto the substrate, the blind hole can be coaxially arranged with the through hole; When the locking end is opened, the second limiting member can rotate around the pin and drive the cleaning groove away from the substrate.

19. The capillary cutting fixture according to claim 14, characterized in that, The first limiting member and the second limiting member are spaced apart, and the gap between them forms the cutting space.

20. The capillary cutting fixture according to any one of claims 14-19, characterized in that, The materials of the first limiting member and / or the second limiting member include, but are not limited to, polyetheretherketone, polytetrafluoroethylene, and polyoxymethylene.

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