Flexible length measuring tool with multiple ranges

Abstract

The utility model provides a flexible length measurement tool with multistage range belongs to length measurement technical field, this flexible length measurement tool with multistage range, include: measurement body, scale mark component, telescopic adjusting mechanism, fixed clamping device and range conversion device, silica gel slender strip measurement body one end fixed connection fixed clamping, the other end screw thread connection telescopic adjusting mechanism, main scale bar is embedded in the recess of upper surface, vice scale bar parallel side wall, the screw hole of adjusting sleeve inner wall is with the rotation of adjusting lever with outer thread, and the rod front end stretches into the body, and the range conversion device in the middle contains conversion disc and positioning pin, and conversion disc is rotatably connected with the body through the central shaft and is covered with scale mark, and positioning pin is locked conversion disc rotating position by being provided with the body, realizes range switching and accurate positioning, the utility model can solve the technical problem that the length measurement tool cannot realize flexible measurement and multistage range conversion function simultaneously in prior art.

Description

Technical Field

[0001] This utility model belongs to the field of length measurement technology, specifically, it relates to a flexible length measurement tool with multiple ranges. Background Technology

[0002] In modern industrial production and daily life, length measurement is a fundamental and crucial technical activity, widely applied in numerous fields such as machinery manufacturing, construction engineering, clothing design, and medical devices. Traditional length measurement tools mainly include rigid measuring tools such as steel rulers, vernier calipers, and micrometers. These tools offer high accuracy and stability when measuring straight distances and regularly shaped objects, but they have significant limitations when dealing with irregular shapes, curved contours, or flexible materials. Existing flexible measuring tools, such as tape measures and leather tape measures, while possessing a certain degree of bending capability, have limited scale accuracy and lack range conversion functions, failing to meet measurement needs with varying precision requirements. In the field of precision manufacturing, for the contour measurement of complex curved parts, existing technologies typically employ coordinate measuring machines (CMMs) or laser measuring equipment. However, these devices are expensive, complex to operate, and unsuitable for rapid on-site measurement. In the clothing design industry, the measurement of human body curves primarily relies on tape measures, but the scale readings of tape measures are prone to errors, and rapid conversion between different ranges is not possible. In the field of medical devices, measurements of wound length, organ dimensions, and other measurements require measuring tools that are both flexible and highly precise, a requirement that current technologies struggle to meet simultaneously. The building decoration industry faces similar technical challenges in measuring curved pipes and irregularly shaped components. Therefore, developing a length measuring tool that combines flexible measurement capabilities with multi-level range conversion is of significant technical importance and practical value for improving measurement efficiency and expanding its application scope. Utility Model Content

[0003] In view of this, the present invention provides a flexible length measuring tool with multiple ranges, which can solve the technical problem that existing length measuring tools cannot simultaneously realize flexible measurement and multi-range conversion functions.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a flexible length measuring tool with multiple measuring ranges, comprising: a measuring body, a scale marking assembly, a telescopic adjustment mechanism, a fixing clamping device, and a range conversion device; the measuring body is made of silicone material and has a slender strip structure. One end of the measuring body is fixedly connected to the fixing clamping device, and the other end of the measuring body is connected to the telescopic adjustment mechanism via a threaded connection; the scale marking assembly includes a main scale bar and a secondary scale bar. The main scale bar is embedded in a groove on the upper surface of the measuring body, and the secondary scale bar is parallel to the side surface of the measuring body; the telescopic adjustment mechanism includes an adjusting sleeve and an adjusting rod. The inner wall of the adjusting sleeve has a threaded hole, and the outer surface of the adjusting rod has an external thread that matches the threaded hole. The adjusting rod is threadedly connected to the threaded hole of the adjusting sleeve via the external thread, and the front end of the adjusting rod extends into the interior of the measuring body; the range conversion device is located in the middle of the measuring body and includes a conversion disc and a positioning pin. The conversion disc is rotatably connected to the measuring body via a central shaft. The scale marking assembly is mounted on the outer sleeve of the conversion disc, and the positioning pin passes through the measuring body to fix the rotational position of the conversion disc.

[0006] The technical advantages of this utility model for a flexible length measuring tool with multiple measuring ranges are as follows: By setting up a combined structure of a measuring body, a scale marking assembly, a telescopic adjustment mechanism, a fixed clamping device, and a range conversion device, the flexible length measuring tool achieves multi-range measurement functions. The measuring body is made of silicone material, which has good flexibility and elasticity, and can adapt to the measurement needs of irregularly shaped objects. The dual marking design of the main scale bar and the secondary scale bar of the scale marking assembly improves the measurement accuracy and reading convenience. The telescopic adjustment mechanism achieves precise adjustment of the measured length through a threaded connection. The range conversion device achieves rapid switching between different ranges through the cooperation of a conversion disc and a positioning pin. The overall structure is compact and reasonable, easy to operate, and has high measurement accuracy.

[0007] Based on the above technical solution, the flexible length measuring tool with multi-level measuring range of this utility model can be further improved as follows:

[0008] The fixed clamping device includes a clamping body and clamping arms. The clamping body has a cylindrical structure, and one end of the clamping body is fixedly connected to the end of the measuring body by adhesive. There are two clamping arms, which are respectively arranged on opposite sides of the clamping body. The clamping arms are rotatably connected to the clamping body through a hinge shaft. The free ends of the two clamping arms face each other and are used to clamp the end of the object being measured.

[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The fixed clamping device adopts a design structure of clamping body and double clamping arms. The cylindrical structure of the clamping body provides a stable support base for the clamping arms. The two clamping arms are rotatably connected to the clamping body through hinge shafts, realizing flexible adjustment of the clamping angle. The structure design of the clamping arms facing each other can effectively clamp the ends of the measured objects of different thicknesses. The clamping force is evenly distributed, avoiding the slippage of the tool during the measurement process, and significantly improving the stability and reliability of the measurement. At the same time, the adhesive fixing connection between the clamping body and the measuring body ensures the connection strength and extends the service life of the tool.

[0010] Furthermore, the cross-section of the measuring body is flat and rectangular, and multiple telescopic segments are provided along the length of the measuring body. Each telescopic segment is connected by a flexible connecting part. The flexible connecting part is made of natural rubber material, and the thickness of the flexible connecting part is less than the thickness of the telescopic segment. The flexible connecting part has a corrugated structure, and the crests and troughs of the corrugations extend and are distributed along the width of the measuring body.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the flat rectangular cross-section design of the measuring body reduces the overall thickness of the tool, making it easier to perform measurement operations in confined spaces; the setting of multiple telescopic segments enhances the overall flexibility of the measuring body; the flexible connection part is made of natural rubber material and designed with a corrugated structure, and the crests and troughs of the corrugations extend and distribute along the width direction, effectively dispersing bending stress and improving the fatigue resistance of the connection part; the design that the thickness of the flexible connection part is less than the thickness of the telescopic segment makes the bending deformation mainly concentrated at the connection part, protecting the structural integrity of the telescopic segment; the overall design achieves a good balance between bending flexibility and structural strength.

[0012] Furthermore, the main scale bar is made of stainless steel, and the upper surface of the main scale bar is etched with precision scale lines with a spacing of 1 mm; the secondary scale bar is made of aluminum alloy, and the secondary scale bar is fixed in the groove on the side surface of the measuring body by an embedded installation method. The surface of the secondary scale bar is provided with range markings of different colors, including centimeter markings, decimeter markings and meter markings.

[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the main scale bar is made of stainless steel, which has good corrosion resistance and wear resistance; the 1 mm spacing precision scale lines etched on the surface ensure the high accuracy requirements of the measurement; the secondary scale bar is made of aluminum alloy, which has the advantages of light weight and good processing performance; the embedded installation method ensures a firm connection between the secondary scale bar and the measuring body; the range markings of different colors include centimeters, decimeters, and meters, providing users with an intuitive way to identify the range and avoiding reading errors; the dual scale bar configuration design improves the accuracy and convenience of measurement and meets the measurement needs of different accuracy requirements.

[0014] Furthermore, the adjusting sleeve has a cylindrical structure, and the outer surface of the adjusting sleeve is provided with anti-slip texture, which is distributed in a spiral pattern; the front end of the adjusting rod is provided with a tapered tip, the cone angle of which is 30 to 45 degrees, and the surface of the tapered tip has a smooth polishing treatment.

[0015] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the cylindrical structure of the adjusting sleeve provides stable guidance and support for the adjusting rod; the spiral anti-slip texture on the outer surface enhances the friction when the fingers are gripping, improving the comfort and safety of operation; the tapered tip design at the front end of the adjusting rod facilitates insertion into the measuring body; the tapered angle range of 30 to 45 degrees ensures ease of insertion while avoiding damage to the measuring body; the smooth polishing treatment of the tapered tip reduces insertion resistance; the threaded connection method enables precise control of the extension and retraction length of the adjusting rod; and the overall design improves the accuracy of extension and retraction adjustment and the convenience of operation.

[0016] Furthermore, the conversion disc is made of polycarbonate material, and the diameter of the conversion disc is 2 to 3 times the width of the measuring body; the positioning pin is made of stainless steel material, and the positioning pin has a cylindrical structure. One end of the positioning pin is provided with an operating handle. The positioning pin is connected to the measuring body through a spring mechanism, which is used to provide the reset force of the positioning pin.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the conversion disc is made of polycarbonate material, which has good transparency and mechanical strength, making it easy to observe the markings on the scale ring; the design of the conversion disc diameter being 2 to 3 times the width of the measuring body provides ample space for scale display; the positioning pin is made of stainless steel, which has good strength and durability; the cylindrical structure ensures precise fit with the positioning hole; the operating handle facilitates positioning operations for users; the spring mechanism provides a restoring force that ensures the positioning pin automatically returns to its original position when not in use; the overall design achieves rapid range conversion and accurate positioning, improving operational efficiency.

[0018] Furthermore, both end faces of the measuring body are provided with rounded chamfers, the radius of which is 2 mm to 5 mm.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the rounded corners on both ends of the measuring body effectively eliminate sharp edges, avoiding scratches or damage to the surface of the object being measured during the measurement process. The rounded corner radius range of 2 mm to 5 mm ensures the protective effect of the chamfer without affecting the accuracy of the measurement. The rounded corner design improves the safety of the tool and reduces the risk of accidental injury during use. At the same time, the rounded corner structure is more aesthetically pleasing and enhances the overall quality of the product.

[0020] Furthermore, the inner surface of the clamping arm is provided with a toothed anti-slip structure, which is distributed in a sawtooth pattern with a tooth height of 0.5 mm to 1 mm.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the toothed anti-slip structure on the inner surface of the clamping arm significantly enhances the friction between the clamping arm and the object being measured, effectively preventing slippage during the measurement process. The sawtooth distribution design can adapt to objects with different surface roughness. The tooth height range of 0.5 mm to 1 mm ensures both anti-slip effect and avoids excessive damage to the surface of the object being measured. The toothed anti-slip structure improves the reliability of clamping and the stability of measurement, ensuring the accuracy of the measurement results.

[0022] Furthermore, the circumferential surface of the conversion disk is provided with raised indicator marks, the number of which corresponds to the number of scale rings, and the indicator marks are triangular protrusions.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the raised indicator marks on the circumference of the conversion disk provide users with an intuitive way to identify the range. The correspondence between the number of indicator marks and the number of scale rings makes it easy for users to quickly locate the required measurement range. The triangular protrusion structure has good visual recognition and tactile feedback effect. Users can quickly confirm the currently selected range by touching it during operation. The raised design has better wear resistance than flat marks, extending the service life of the marks. The overall design improves the convenience and accuracy of range conversion.

[0024] Furthermore, the flexible connection has 5 to 8 corrugations, the corrugation height is 20% to 30% of the thickness of the measuring body, and the distance between adjacent corrugations is 3 to 5 millimeters.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: controlling the number of corrugations in the flexible connection part to be within the range of 5 to 8 ensures sufficient bending flexibility; the design parameter of the corrugation height being 20% ​​to 30% of the thickness of the measuring body optimizes the distribution of bending stress and avoids stress concentration; the setting of the spacing between adjacent corrugations of 3 mm to 5 mm ensures the stability of the corrugated structure. These precise dimensional parameters enable the flexible connection part to have good fatigue resistance when subjected to repeated bending deformation, extend the service life of the tool, and at the same time ensure the flexible deformation capability during the measurement process.

[0026] Compared with existing technologies, the advantages of this utility model's flexible length measuring tool with multi-range measurement are as follows: This utility model, through innovative structural design, successfully overcomes the technical limitations of traditional length measuring tools in flexible measurement and multi-range conversion. The measuring body adopts a slender strip structure made of silicone material, combined with multiple telescopic segments and flexible connections, achieving good adaptability when measuring irregularly shaped objects. It can bend and deform along the contour of the measured object, significantly improving measurement accuracy and applicability. The dual-marking design of the scale marking component, with the main scale providing precision measurement and the secondary scale providing range identification, significantly improves the convenience and accuracy of readings compared to traditional single-scale designs. The telescopic adjustment mechanism achieves stepless adjustment of the measured length through a threaded connection, with adjustment accuracy down to the millimeter level, meeting the requirements of precision measurement. The range conversion device, through the ingenious cooperation of the conversion disc and positioning pin, achieves rapid switching between different ranges such as centimeters, decimeters, and meters, with simple operation and accurate positioning. The dual-arm clamping design of the fixed clamping device ensures a reliable connection between the tool and the object being measured, avoiding slippage during the measurement process. The overall structure is compact and reasonable, and the operation is simple. Compared with existing technologies, it has significant advantages such as high measurement accuracy, wide applicability, and ease of operation, filling a technological gap in the field of flexible multi-range length measuring tools. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Fig. 1 This is a schematic diagram of a flexible length measuring tool with multiple measuring ranges.

[0029] Fig. 2 This is a schematic diagram of the rear side of a flexible length measuring tool with multiple measuring ranges.

[0030] Fig. 3 A top view of a flexible length measuring tool with multiple measuring ranges;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Measuring body; 2. Scale marking assembly; 3. Telescopic adjustment mechanism; 4. Fixing clamping device; 5. Range conversion device. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figs. 1-3 The diagram shows a first embodiment of a flexible length measuring tool with multiple measuring ranges provided by this utility model. In this embodiment, it includes: a measuring body 1, a scale marking assembly 2, a telescopic adjustment mechanism 3, a fixing clamping device 4, and a range conversion device 5. The measuring body 1 is made of silicone material and has a long, thin strip structure. One end of the measuring body 1 is fixedly connected to the fixing clamping device 4, and the other end of the measuring body 1 is connected to the telescopic adjustment mechanism 3 via a threaded connection. The scale marking assembly 2 includes a main scale bar and a secondary scale bar. The main scale bar is embedded in a groove on the upper surface of the measuring body 1, and the secondary scale bar... Parallel arrangement on the side surface of the measuring body 1; the telescopic adjustment mechanism 3 includes an adjustment sleeve and an adjustment rod. The inner wall of the adjustment sleeve has a threaded hole, and the outer surface of the adjustment rod has an external thread that matches the threaded hole. The adjustment rod is threadedly connected to the threaded hole of the adjustment sleeve through the external thread, and the front end of the adjustment rod extends into the interior of the measuring body 1; the range conversion device 5 is located in the middle of the measuring body 1 and includes a conversion disc and a positioning pin. The conversion disc is rotatably connected to the measuring body 1 through a central shaft. The outer sleeve of the conversion disc is provided with a scale marking assembly 2, and the positioning pin passes through the measuring body 1 to fix the rotational position of the conversion disc.

[0035] In the above technical solution, the fixed clamping device 4 includes a clamping body and clamping arms. The clamping body has a cylindrical structure, and one end of the clamping body is fixedly connected to the end of the measuring body 1 by adhesive. There are two clamping arms, which are respectively arranged on opposite sides of the clamping body. The clamping arms are rotatably connected to the clamping body through a hinge shaft. The free ends of the two clamping arms are arranged facing each other and are used to clamp the end of the object being measured.

[0036] Furthermore, in the above technical solution, the cross-section of the measuring body 1 is flat and rectangular, and multiple telescopic segments are provided in the length direction of the measuring body 1. Each telescopic segment is connected by a flexible connecting part. The flexible connecting part is made of natural rubber material, and the thickness of the flexible connecting part is less than the thickness of the telescopic segment. The flexible connecting part has a corrugated structure, and the crests and troughs of the corrugations extend and are distributed along the width direction of the measuring body 1.

[0037] Furthermore, in the above technical solution, the main scale bar is made of stainless steel, and the upper surface of the main scale bar is etched with precision scale lines with a spacing of 1 mm; the secondary scale bar is made of aluminum alloy, and the secondary scale bar is fixed in the groove on the side surface of the measuring body 1 by an embedded installation method. The surface of the secondary scale bar is provided with range markings of different colors, including centimeter markings, decimeter markings and meter markings.

[0038] Furthermore, in the above technical solution, the adjusting sleeve has a cylindrical structure, and the outer surface of the adjusting sleeve is provided with anti-slip texture, which is distributed in a spiral pattern; the front end of the adjusting rod is provided with a tapered tip, the cone angle of which is 30 to 45 degrees, and the surface of the tapered tip has a smooth polishing treatment.

[0039] Furthermore, in the above technical solution, the conversion disc is made of polycarbonate material, and the diameter of the conversion disc is 2 to 3 times the width of the measuring body 1; the positioning pin is made of stainless steel material, and the positioning pin has a cylindrical structure. One end of the positioning pin is provided with an operating handle, and the positioning pin is connected to the measuring body 1 through a spring mechanism. The spring mechanism is used to provide the reset force of the positioning pin.

[0040] Furthermore, in the above technical solution, both end faces of the measuring body 1 are provided with rounded chamfers, and the radius of the rounded chamfers is 2 mm to 5 mm.

[0041] Furthermore, in the above technical solution, the inner surface of the clamping arm is provided with a toothed anti-slip structure, which is distributed in a serrated pattern, with the height of the serrations ranging from 0.5 mm to 1 mm.

[0042] Furthermore, in the above technical solution, raised indicator marks are provided on the circumferential surface of the converter disk, the number of indicator marks corresponding to the number of scale rings, and the indicator marks are triangular protruding structures.

[0043] Furthermore, in the above technical solution, the number of corrugations in the flexible connection is 5 to 8, the wave height of the corrugations is 20% to 30% of the thickness of the measuring body 1, and the distance between adjacent wave crests is 3 to 5 millimeters.

[0044] The following is a specific embodiment 1 of this utility model: In this embodiment, the measuring body 1 is made of medical-grade silicone material, which has excellent biocompatibility and chemical stability. The measuring body 1 has a total length of 500 mm, a width of 15 mm, and a thickness of 3 mm, and has an overall slender, flat rectangular structure. The measuring body 1 has 10 telescopic segments along its length, each segment being 45 mm long. The segments are connected by flexible connecting parts, each 5 mm long, made of natural rubber material, which has excellent elasticity and fatigue resistance. The flexible connecting parts are designed with a corrugated structure, each containing 6 corrugations with a wave height of 1 mm, a trough depth of 0.8 mm, and a spacing of 4 mm between adjacent wave peaks. The corrugations extend and distribute along the width direction of the measuring body 1. This design ensures that when the measuring body 1 bends, the stress is mainly concentrated in the flexible connecting parts, protecting the structural integrity of the telescopic segments. The scale marking assembly 2 includes a main scale bar and a secondary scale bar. The main scale bar is made of 316 stainless steel, with a length of 480 mm, a width of 8 mm, and a thickness of 0.5 mm. Precision scale lines are created on its surface using laser etching, with a scale line spacing of 1 mm and a scale line depth of 0.1 mm, ensuring high-precision measurement requirements. The main scale bar is embedded in a groove on the upper surface of the measuring body 1, with a groove depth of 0.6 mm, ensuring that the surface of the main scale bar is flush with the surface of the measuring body 1. The secondary scale bar is made of 6061 aluminum alloy and has undergone anodizing treatment. Its surface has different colored range markings: red for centimeters, blue for decimeters, and green for meters. The secondary scale bar measures 480 mm in length, 5 mm in width, and 0.3 mm in thickness. The clamping body of the fixing clamping device 4 is made of engineering plastic ABS, with a cylindrical structure, a diameter of 12 mm, and a length of 25 mm, possessing good mechanical strength and wear resistance. The clamping arms are made of spring steel, each measuring 20 mm in length, 8 mm in width, and 1 mm in thickness. They are connected to the clamping body via 2 mm diameter stainless steel hinge shafts. The hinge shafts are chrome-plated for excellent corrosion resistance and smooth rotation. The inner surface of the clamping arms features a serrated anti-slip structure with a tooth height of 0.8 mm and a tooth pitch of 2 mm, effectively enhancing clamping force. The telescopic adjustment mechanism 3's adjusting sleeve is made of aluminum alloy, with an outer diameter of 18 mm, an inner diameter of 12 mm, and a length of 35 mm. The inner wall has an M10 standard thread, and the outer surface has a spiral anti-slip texture with a texture depth of 0.5 mm and a spiral angle of 45 degrees. The adjusting rod is made of stainless steel, with a diameter of 10 mm and a length of 60 mm. Its outer surface has an M10 external thread matching the adjusting sleeve, with a thread lead of 1.5 mm, ensuring precise adjustment capability. The front end of the adjusting rod is equipped with a tapered tip with a taper angle of 35 degrees and a tapered length of 8 mm. The surface is precision polished to achieve a surface roughness of Ra0.4 micrometers.The conversion disc of the range conversion device 5 is made of transparent polycarbonate material, with a diameter of 40 mm and a thickness of 3 mm. Three different scale rings are set on its circumference, corresponding to centimeters, decimeters, and meters respectively. Each scale ring is made using laser marking technology of a different color. The positioning pin is made of stainless steel, with a diameter of 3 mm and a length of 15 mm. Its surface is polished. The positioning pin is connected to the measuring body 1 via a compression spring with a spring stiffness of 50 Newtons per meter, ensuring reliable positioning and comfortable operation.

[0045] The following is another specific embodiment 2 of this utility model: Embodiment 2 is based on Embodiment 1, with optimizations and improvements made to the material and structure of the measuring body 1. The measuring body 1 is made of dual-density silicone material. The telescopic segment is made of silicone material with a hardness of Shore A80, which has good structural stability. The flexible connection part is made of soft silicone material with a hardness of Shore A40, which further improves bending flexibility. The cross-section of the measuring body 1 is designed as an I-shaped structure. The upper and lower flanges are used to install the scale marking assembly 2, and the middle web part bears the main tensile load. This design reduces the overall weight while ensuring strength. The corrugated structure of the flexible connection part adopts a sine wave shape, which has better stress distribution uniformity than the sawtooth corrugation of Embodiment 1. The wave height is increased to 1.2 mm and the wavelength is 6 mm, which further improves bending performance. The scale marking assembly 2 is coated with a luminescent coating. The scale markings of the main scale bar and the sub-scale bar are coated with a coating containing rare earth luminescent material. It absorbs light energy when there is sufficient light and emits a light green light in the dark environment, which facilitates measurement and reading under low light conditions. The range conversion device 5 features a tactile feedback function on its conversion disc, with different tactile markers for each range position: a circular protrusion for the centimeter range, a square protrusion for the decimeter range, and a triangular protrusion for the meter range. Users can quickly identify the selected range by touch, improving operational convenience in visually limited environments. The telescopic adjustment mechanism 3 has added a digital scale display to the outer surface of its adjusting sleeve to indicate the extension length of the adjusting rod. The scale accuracy is in the millimeter range, allowing users to easily grasp the adjustment amount. Overall, the improved tool, while maintaining its original functionality, further enhances ease of use and environmental adaptability, making it particularly suitable for use in complex working environments.

[0046] The following is another specific embodiment 3 of this utility model: Embodiment 3 is based on Embodiment 1, with the addition of temperature compensation function and waterproof performance. A shape memory alloy wire is embedded inside the measuring body 1. The shape memory alloy wire is made of nickel-titanium alloy material, has a diameter of 0.5 mm, and is arranged along the length direction of the measuring body 1. When the ambient temperature changes, the length change of the shape memory alloy wire can compensate for the dimensional change of the silicone material caused by temperature changes, ensuring that the measurement accuracy is not affected by temperature. The surface of the measuring body 1 is treated with nano-coating technology for waterproofing. The coating thickness is 5 micrometers, has superhydrophobic properties, and a contact angle greater than 150 degrees, effectively preventing water penetration and improving the reliability of the tool in humid environments. The scale marking assembly 2 is combined with the measuring body 1 using laser welding technology, replacing the embedded installation method in Embodiment 1. The joint interface formed by laser welding has excellent sealing performance, preventing water from seeping in from the joint interface. The clamping arm of the fixing clamping device 4 is equipped with a soft rubber gasket. The gasket is made of fluororubber material, which has excellent chemical corrosion resistance and elasticity, and can form a good sealing effect when clamping the measured object, preventing water from entering the interior of the clamping device. An O-ring is added to the threaded connection of the telescopic adjustment mechanism 3. The O-ring is made of nitrile rubber and effectively prevents moisture from seeping into the mechanism through the thread gap. A sealing gasket is added between the conversion disc of the range conversion device 5 and the measuring body 1 to ensure the sealing performance of the rotating parts. The entire tool has an IP67 waterproof rating and can operate normally for more than 30 minutes in water at a depth of 1 meter, greatly expanding its application range. It is particularly suitable for use in marine engineering, water conservancy construction, and outdoor operations. The temperature compensation function ensures that the tool maintains stable measurement accuracy within a temperature range of -20 degrees Celsius to 60 degrees Celsius.

[0047] Specifically, the principle of this utility model is as follows: This utility model adopts a technical principle combining materials science and mechanical structure design. By selecting silicone material with excellent flexibility and elasticity as the base material of the measuring body, the molecular structure characteristics of silicone material are utilized to achieve the tool's flexible deformation capability. The multi-segment design of the measuring body is based on the principles of materials mechanics. By decomposing the overall structure into multiple relatively rigid telescopic segments and flexible connecting parts, an organic combination of overall flexibility and local rigidity is achieved. The corrugated structure design of the flexible connecting parts is based on the principle of stress analysis. The corrugated structure can effectively disperse bending stress and avoid material fatigue failure caused by stress concentration. The scale marking assembly adopts a dual marking principle. The main scale bar provides basic measurement accuracy, and the secondary scale bar provides range identification function. The two work together to achieve a balance between accuracy and convenience. The telescopic adjustment mechanism is based on the principle of threaded transmission. The precise control of linear motion is achieved through the cooperation of the thread pair. The lead design of the thread determines the adjustment accuracy; a smaller lead can achieve higher adjustment accuracy. The range switching device is based on the principle of mechanical positioning. The rotational motion of the switching disc achieves accurate positioning of different ranges through the limiting action of the positioning pin. The spring return mechanism of the positioning pin ensures the reliability of positioning and the convenience of operation. The fixed clamping device is based on the principle of friction mechanics. It increases the clamping force by increasing the contact area and surface roughness, and the toothed anti-slip structure design effectively enhances the friction effect. The technical principle of the entire tool reflects the comprehensive application of multidisciplinary technologies. Through reasonable structural design and material selection, it achieves the technical goals of flexible measurement and accurate range switching.

[0048] The specific operation or use method of this utility model is as follows: Before use, first check whether all parts of the measuring tool are intact, confirm that the scale marks are clearly visible, and that there is no looseness in any connection parts. According to the estimated length of the object to be measured and the required accuracy, select the appropriate measurement range by rotating the conversion disc of the range conversion device. When the conversion disc rotates, you will feel the positioning feedback of the positioning pin and hear a slight positioning sound. After confirming that the range selection is correct, the positioning pin automatically resets and fixes the position of the conversion disc. Open the clamping arms of the fixing clamping device and clamp the starting end of the object to be measured between the clamping arms. By squeezing the clamping arms, the object to be measured is tightly clamped, ensuring that the clamping is firm and will not slip. According to the required length of the object to be measured, the measurement length is adjusted by rotating the adjusting sleeve of the telescopic adjustment mechanism. Clockwise rotation increases the measurement length, and counterclockwise rotation decreases the measurement length. During the adjustment process, the conical tip of the adjusting rod will extend or retract accordingly. Lay the measuring body along the contour of the object to be measured. Because the measuring body has good flexibility, it can adapt to various curved shapes. During the laying process, keep the measuring body in close contact with the object to be measured and avoid gaps. During measurement, observe the readings on the main and secondary scale bars. The main scale bar provides a precise numerical reading, while the secondary scale bar confirms the measurement range. Identify the unit of measurement based on the color code of the selected range. After measurement, record the reading. Slowly remove the measuring tool. First, loosen the clamping device, then remove the measuring body from the object being measured, avoiding sudden pulling that could damage the tool. After use, clean the tool thoroughly, check the wear of all parts, and store it properly for future use. Avoid prolonged bending during storage; keep the measuring body in a naturally straight position to extend the tool's lifespan.

Claims

1. A flexible length measuring tool with multiple measuring ranges, characterized in that, include: The measurement body comprises a measuring body, a scale marking assembly, a telescopic adjustment mechanism, a fixing clamping device, and a range conversion device. The measuring body is made of silicone material and has a long, thin strip structure. One end of the measuring body is fixedly connected to the fixing clamping device, and the other end is connected to the telescopic adjustment mechanism via a threaded connection. The scale marking assembly includes a main scale bar and a secondary scale bar. The main scale bar is embedded in a groove on the upper surface of the measuring body, and the secondary scale bar is parallel to the side surface of the measuring body. The telescopic adjustment mechanism includes an adjusting sleeve and an adjusting rod. The inner wall of the adjusting sleeve has a threaded hole, and the outer surface of the adjusting rod has an external thread matching the threaded hole. The adjusting rod is threadedly connected to the threaded hole of the adjusting sleeve via the external thread, and the front end of the adjusting rod extends into the interior of the measuring body. The range conversion device is located in the middle of the measuring body and includes a conversion disc and a positioning pin. The conversion disc is rotatably connected to the measuring body via a central shaft. The outer sleeve of the conversion disc is fitted with a scale marking assembly, and the positioning pin passes through the measuring body to fix the rotational position of the conversion disc.

2. The flexible length measuring tool with multi-level measuring range according to claim 1, characterized in that, The fixed clamping device includes a clamping body and clamping arms. The clamping body has a cylindrical structure, and one end of the clamping body is fixedly connected to the end of the measuring body by adhesive. There are two clamping arms, which are respectively arranged on opposite sides of the clamping body. The clamping arms are rotatably connected to the clamping body through a hinge shaft. The free ends of the two clamping arms face each other and are used to clamp the end of the object being measured.

3. A flexible length measuring tool with multi-level measuring range according to claim 2, characterized in that, The cross-section of the measuring body is flat and rectangular. Multiple telescopic segments are provided along the length of the measuring body, and each telescopic segment is connected by a flexible connecting part. The flexible connecting part is made of natural rubber material. The thickness of the flexible connecting part is less than the thickness of the telescopic segment. The flexible connecting part has a corrugated structure, and the crests and troughs of the corrugations extend and are distributed along the width of the measuring body.

4. A flexible length measuring tool with multi-level measuring range according to claim 3, characterized in that, The main scale bar is made of stainless steel, and the upper surface of the main scale bar is etched with precision scale lines with a spacing of 1 mm. The secondary scale bar is made of aluminum alloy and is fixed in a groove on the side surface of the measuring body by an embedded installation method. The surface of the secondary scale bar is provided with range markings of different colors, including centimeter, decimeter and meter markings.

5. A flexible length measuring tool with multi-level measuring range according to claim 4, characterized in that, The adjusting sleeve has a cylindrical structure, and the outer surface of the adjusting sleeve is provided with anti-slip texture, which is distributed in a spiral pattern; the front end of the adjusting rod is provided with a tapered tip, the cone angle of which is 30 to 45 degrees, and the surface of the tapered tip is smoothly polished.

6. A flexible length measuring tool with multi-level measuring range according to claim 5, characterized in that, The conversion disc is made of polycarbonate material, and its diameter is 2 to 3 times the width of the measuring body. The positioning pin is made of stainless steel and has a cylindrical structure. One end of the positioning pin is equipped with an operating handle. The positioning pin is connected to the measuring body through a spring mechanism, which provides the resetting force for the positioning pin.

7. A flexible length measuring tool with multi-level measuring range according to claim 6, characterized in that, Both end faces of the measuring body are provided with rounded chamfers, and the radius of the rounded chamfers is 2 mm to 5 mm.

8. A flexible length measuring tool with multi-level measuring range according to claim 7, characterized in that, The inner surface of the clamping arm is provided with a toothed anti-slip structure, which is distributed in a sawtooth pattern with a tooth height of 0.5 mm to 1 mm.

9. A flexible length measuring tool with multi-level measuring range according to claim 8, characterized in that, The circumferential surface of the converter disk is provided with raised indicator marks, the number of which corresponds to the number of scale rings, and the indicator marks are triangular protrusions.

10. A flexible length measuring tool with multi-level measuring range according to claim 9, characterized in that, The flexible connector has 5 to 8 corrugations, the corrugation height is 20% to 30% of the thickness of the measuring body, and the distance between adjacent corrugations is 3 to 5 millimeters.

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