A document edge trimmer

Abstract

The utility model provides a kind of bill edge cutting device, belong to bill cutting technical field, this bill edge cutting device, include: base, sliding guide, cutting knife rest, pressing mechanism and positioning baffle;Aluminium alloy base is rectangular flat plate, there is 3-8 millimeter deep, 15-25 millimeter wide longitudinal sliding slot;Stainless steel sliding guide T cross section, lower end is embedded into sliding slot sliding;Carbon steel cutting knife rest L type, horizontal section is connected sliding guide, vertical section is equipped with alloy steel cutting blade, cutting edge is 15-30 degree angle with base;Pressing mechanism contains aluminium alloy pressing rod and spring, rod one end articulates base side, the other end has pressing head, spring provides down pressure;Plastic positioning baffle rectangle, bolt fixed base front end, perpendicular to base, limit bill position;The utility model can solve the technical problems of bill edge cutting equipment in prior art, cutting precision is not high, operation is complex, equipment structure is not stable.

Description

Technical Field

[0001] This utility model belongs to the field of bill cutting technology, specifically, it relates to a bill edge cutter. Background Technology

[0002] In modern office and financial operations, edge trimming of documents is a crucial process, especially in institutions such as banks, insurance companies, and finance departments, where large quantities of checks, drafts, and receipts require edge trimming to ensure a neat appearance and standardized dimensions. Traditional document edge trimming relies primarily on simple, manually operated cutters. These devices typically consist of a fixed base, a simple ruler guide, and a manual cutting blade. The operator must manually place the document, align it, and apply pressure to cut. However, this traditional method has significant drawbacks. First, cutting accuracy is difficult to guarantee. Due to the lack of a precise guiding mechanism, manual operation is prone to misalignment, resulting in crooked or angular cuts. Second, operational efficiency is low. Each cut requires repositioning and alignment, which is particularly labor-intensive and error-prone when processing large volumes of documents. Furthermore, traditional equipment has poor adaptability to documents of varying thicknesses; thin documents tend to slip, while thick documents are difficult to clamp, affecting cutting quality. While some electric or semi-automatic document trimming machines have emerged, these devices are complex in structure, expensive, difficult to maintain, and overly complex for typical office environments, making them inefficient in terms of cost-effectiveness. Therefore, there is an urgent need for a simple, easy-to-operate, high-precision, and highly adaptable document edge cutter to meet daily office needs. Utility Model Content

[0003] In view of this, the present invention provides a bill edge cutter, which can solve the technical problems of low cutting accuracy, complicated operation and unstable equipment structure of existing bill edge cutting equipment.

[0004] This utility model is implemented as follows: This utility model provides a document edge cutter, comprising: a base, a sliding guide rail, a cutting blade holder, a clamping mechanism, and a positioning baffle; the base is made of aluminum alloy and has a rectangular flat structure, with a longitudinally extending groove on the upper surface of the base, the groove having a depth of 3 mm to 8 mm and a width of 15 mm to 25 mm; the sliding guide rail is made of stainless steel and has a slender strip structure, with a T-shaped cross-section, wherein the lower end of the T-shaped cross-section protrudes into the groove, and the sliding guide rail is slidably connected to the base along the groove direction; the cutting blade holder is made of carbon steel and has an L-shaped structure, the horizontal section of the cutting blade holder is fixedly connected to the upper surface of the sliding guide rail, and the vertical section of the cutting blade holder faces upwards. The upper end of the extended vertical section is fixedly equipped with a cutting blade made of alloy steel. The blade is straight and the cutting edge forms an acute angle of 15 to 30 degrees with the upper surface of the base. The clamping mechanism includes a clamping rod and a clamping spring. The clamping rod is made of aluminum alloy and is long and thin. One end of the clamping rod is rotatably connected to the side of the base via a hinge shaft, and the other end of the clamping rod is equipped with a clamping head, which is flat. The clamping spring is located between the clamping rod and the base to provide downward elastic force to the clamping rod. The positioning baffle is made of plastic and has a rectangular plate structure. The lower end of the positioning baffle is fixedly connected to the front edge of the base by bolts. The positioning baffle is set perpendicular to the upper surface of the base to limit the feeding position of the document.

[0005] The technical advantages of the document edge cutter provided by this utility model are as follows: Through the coordinated cooperation of the base, sliding guide rail, cutting blade holder, clamping mechanism, and positioning baffle, the precise cutting function of document edges is achieved. The T-shaped cross-section structure of the sliding guide rail and the matching design of the base groove ensure the straightness and stability of the blade holder movement during the cutting process, avoiding cutting deviation. The clamping mechanism ensures the fixed state of the document during the cutting process through the constant pressure provided by the spring. The positioning baffle enables accurate positioning of the document feed position. The overall structure is simple and reliable, easy to operate, and has high cutting accuracy.

[0006] Based on the above technical solution, the document edge trimmer of this utility model can be further improved as follows: The left and right edges of the base are bent upward to form sidewalls, the height of which is 10 mm to 20 mm, and the sidewalls are at a 90-degree right angle to the upper surface of the base. The slide is opened in the center of the upper surface of the base, and the longitudinal length of the slide accounts for 80% to 95% of the total length of the base. Both ends of the slide are provided with arc-shaped transition structures with an arc radius of 2 mm to 5 mm.

[0007] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the upward bending design of the base sidewall forms a lateral constraint on the ticket, preventing the ticket from slipping laterally during the cutting process and improving the cutting accuracy; the arc-shaped transition structure of the slide reduces the impact of the sliding guide rail at the end of the slide, extending the service life of the equipment; and the high proportion of the slide length to the total length of the base ensures a large cutting stroke range, meeting the cutting needs of tickets of different sizes.

[0008] Furthermore, in the T-shaped cross-section of the sliding guide rail, the width of the upper transverse portion is 18 mm to 28 mm, and the thickness is 3 mm to 6 mm; the width of the lower protruding portion is 12 mm to 22 mm, and the thickness is 2 mm to 4 mm; the upper surface of the sliding guide rail is provided with at least 3 equally spaced threaded holes, the diameter of which is 4 mm to 8 mm, and the threaded holes are used to connect with the horizontal section of the cutting blade holder by bolts.

[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the precise size design of the T-shaped cross section of the sliding guide rail ensures good fit accuracy with the slide groove, the upper horizontal part bears the main load-bearing function, the lower protruding part plays a guiding role, the equidistant distribution design of the threaded holes provides multiple fixed position options for the cutting blade holder, making it easy to adjust the position of the blade holder according to different cutting needs, and the diameter range of the threaded holes ensures the fit strength with the standard bolts.

[0010] Furthermore, in the L-shaped structure of the cutting blade holder, the horizontal section has a length of 40 mm to 80 mm, a width of 20 mm to 35 mm, and a thickness of 5 mm to 10 mm; the vertical section has a height of 30 mm to 60 mm and a width the same as the horizontal section. The upper end of the vertical section is provided with a blade mounting groove, the depth of which is 3 mm to 8 mm and the width is 1.1 to 1.3 times the thickness of the blade. The cutting blade is fixedly installed in the blade mounting groove by clamping bolts.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the precise dimensional design of the L-shaped structure of the cutting blade holder ensures sufficient structural strength and rigidity; the dimensional range of the horizontal section provides a reliable connection with the sliding guide rail; the height design of the vertical section ensures a suitable distance between the blade and the base; the precise fit design of the blade mounting slot ensures the stability and positional accuracy of the blade installation; and the use of clamping bolts enables quick blade replacement and secure fixing.

[0012] Furthermore, the clamping rod has an arc-shaped curved structure with an arc radius of 80 mm to 150 mm, a total length of 120 mm to 200 mm, and a diameter of 8 mm to 15 mm; the clamping head is elliptical and flat, with a major axis of 20 mm to 35 mm, a minor axis of 12 mm to 20 mm, a thickness of 3 mm to 6 mm, and multiple parallel anti-slip grooves on the lower surface of the clamping head with a depth of 0.5 mm to 1.5 mm.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the arc-shaped bending structure design of the clamping rod enables the clamping head to form a uniform pressure distribution when clamping the document, avoiding damage to the document caused by excessive local pressure; the design of the elliptical flat clamping head increases the contact area with the document and improves the stability of the clamping effect; the anti-slip texture further enhances the friction between the clamping head and the document, preventing the document from sliding during the cutting process.

[0014] Furthermore, the hinge shaft is made of stainless steel with a diameter of 6 mm to 12 mm. The hinge shaft passes through the shaft hole on the side of the base and the rear shaft hole of the clamping rod. The diameter of the shaft hole is 0.2 mm to 0.5 mm larger than the diameter of the hinge shaft, forming a rotational clearance. The clamping spring is made of spring steel with a free length of 25 mm to 45 mm and a spring constant of 200 N / m to 500 N / m. One end of the clamping spring abuts against the upper surface of the base, and the other end abuts against the lower surface of the middle section of the clamping rod.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the precise clearance design between the hinge shaft and the shaft hole ensures the flexibility of the clamping rod rotation, while avoiding the shaking caused by excessive clearance; the parameter design of the clamping spring provides a suitable clamping force, which not only ensures the fixing effect of the document, but also avoids damage to the document caused by excessive pressure; the design of one end of the spring being fixed to the base and the other end acting on the clamping rod realizes the automatic adjustment function of the clamping force.

[0016] Furthermore, the upper surface of the base has multiple horizontally distributed positioning grooves. The positioning grooves have a rectangular cross-section, a groove depth of 1 mm to 3 mm, a groove width of 2 mm to 5 mm, and a spacing of 8 mm to 15 mm between adjacent positioning grooves.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the horizontal positioning groove design on the upper surface of the base provides a precise positioning reference for tickets of different thicknesses; the rectangular cross-section structure of the positioning groove ensures good fit of the ticket edges; the equidistant distribution of multiple positioning grooves adapts to the positioning needs of tickets of different specifications; and the depth and width design of the positioning groove not only ensures the positioning effect but also facilitates the placement and removal of tickets.

[0018] Furthermore, the cutting blade has a trapezoidal cross-section structure, with the length of the upper base being equal to the blade thickness, the length of the lower base being 2 to 3 times the length of the upper base, and the height of the trapezoid being one-third to one-half of the blade width.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the trapezoidal cross-section structure design of the cutting blade optimizes the cutting performance of the blade, the upper bottom edge serves as the cutting edge to ensure sharpness, the widening design of the lower bottom edge enhances the structural strength of the blade, the gradient structure of the trapezoidal cross-section reduces the resistance in the cutting process and improves the cutting efficiency. At the same time, the trapezoidal structure facilitates the smooth discharge of chips and avoids chip accumulation that affects the cutting quality.

[0020] Furthermore, the upper end of the positioning baffle has an arc-shaped structure with an arc radius of 8 mm to 15 mm, the thickness of the positioning baffle is 3 mm to 8 mm, and the height of the positioning baffle in the vertical direction is 1.5 to 2.5 times the maximum thickness of the ticket.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the arc-shaped structure design at the upper end of the positioning baffle avoids scratches or damage to the tickets caused by sharp edges and corners; the arc-shaped structure facilitates the smooth attachment and positioning of the tickets; the reasonable design of the thickness of the positioning baffle ensures sufficient structural strength; and the height design takes into account the range of changes in ticket thickness, providing effective positioning support for tickets of different thicknesses.

[0022] Furthermore, the connection between the upper transverse portion and the lower protruding portion of the T-shaped cross-section of the sliding guide rail is provided with a chamfer structure, the chamfer angle is 30 degrees to 60 degrees, and the chamfer depth is 0.5 mm to 2 mm.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the chamfer structure design at the T-shaped cross-section connection of the sliding guide eliminates the sharp right-angle edge, reduces stress concentration during the sliding process, reduces the degree of wear, the reasonable design of the chamfer angle ensures the structural strength while improving the sliding performance, and the precise control of the chamfer depth avoids excessive weakening of the structural strength and extends the service life of the sliding guide.

[0024] Compared with existing technologies, the beneficial effects of the document edge cutter provided by this utility model are as follows: This utility model achieves high-precision linear motion of the cutting blade holder through an innovative T-shaped fit structure of the sliding guide rail and the base groove, effectively solving the problem of cutting offset in existing technologies. The clamping mechanism adopts an arc-shaped clamping rod combined with a spring design, achieving adaptive clamping for documents of different thicknesses and ensuring the stability of the document position during the cutting process. The combined design of the positioning baffle and the base positioning groove provides multiple positioning references for the document, significantly improving the repeatability accuracy of the cutting. The L-shaped cutting blade holder structure ensures the perpendicularity of the blade to the base, and the optimized design of the trapezoidal cross-section blade achieves a clean and crisp cutting effect. The overall structure adopts a standard mechanical connection method, requiring no electric drive, making operation simple and maintenance convenient. It is suitable for cutting documents of various thicknesses and materials, improving cutting accuracy while reducing equipment costs and usage complexity, providing an efficient and reliable edge cutting solution for the document processing industry. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of a document edge trimmer; Figure 2 This is a right view of a document edge trimmer; Figure 3 A top view of a document edge trimmer; The attached diagram lists the components represented by each number as follows: 1. Base; 2. Sliding guide rail; 3. Cutting blade holder; 4. Pressing mechanism; 41. Pressing rod; 42. Pressing spring; 5. Positioning baffle. Detailed Implementation

[0027] 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.

[0028] like Figures 1-3The image shows a first embodiment of a document edge cutter provided by this utility model. In this embodiment, it includes: a base 1, a sliding guide rail 2, a cutting blade holder 3, a pressing mechanism 4, and a positioning baffle 5. The base 1 is made of aluminum alloy and has a rectangular flat structure. The upper surface of the base 1 has a longitudinally extending groove with a depth of 3 mm to 8 mm and a width of 15 mm to 25 mm. The sliding guide rail 2 is made of stainless steel and has a slender strip structure. The cross-section of the sliding guide rail 2 is T-shaped, with the lower end of the T-shaped cross-section protruding and embedded in the groove. The sliding guide rail 2 is slidably connected to the base 1 along the direction of the groove. The cutting blade holder 3 is made of carbon steel and has an L-shaped structure. The horizontal section of the cutting blade holder 3 is fixedly connected to the upper surface of the sliding guide rail 2, and the vertical section of the cutting blade holder 3 extends upwards. The upper end of the extended vertical section is fixedly equipped with a cutting blade made of alloy steel. The blade is straight and the cutting edge forms an acute angle of 15 to 30 degrees with the upper surface of the base 1. The clamping mechanism 4 includes a clamping rod 41 and a clamping spring 42. The clamping rod 41 is made of aluminum alloy and is long and thin. One end of the clamping rod 41 is rotatably connected to the side of the base 1 via a hinge shaft. The other end of the clamping rod 41 is provided with a clamping head, which is flat. The clamping spring 42 is located between the clamping rod 41 and the base 1 to provide downward elastic force to the clamping rod 41. The positioning baffle 5 is made of plastic and has a rectangular plate structure. The lower end of the positioning baffle 5 is fixedly connected to the front edge of the base 1 by bolts. The positioning baffle 5 is set perpendicular to the upper surface of the base 1 to limit the feeding position of the document.

[0029] In the above technical solution, the left and right edges of the base 1 are bent upward to form sidewalls, the height of which is 10 mm to 20 mm, and the sidewalls are at a 90-degree right angle to the upper surface of the base 1; the slide is opened in the center of the upper surface of the base 1, the longitudinal length of the slide accounts for 80% to 95% of the total length of the base 1, and both ends of the slide are provided with arc-shaped transition structures with an arc radius of 2 mm to 5 mm.

[0030] Furthermore, in the above technical solution, in the T-shaped cross-section of the sliding guide rail 2, the width of the upper horizontal portion is 18 mm to 28 mm, the thickness is 3 mm to 6 mm, the width of the lower protruding portion is 12 mm to 22 mm, and the thickness is 2 mm to 4 mm; the upper surface of the sliding guide rail 2 is provided with at least 3 equally spaced threaded holes, the diameter of which is 4 mm to 8 mm, and the threaded holes are used to connect with the horizontal section of the cutting blade holder 3 by bolts.

[0031] Furthermore, in the above technical solution, in the L-shaped structure of the cutting blade holder 3, the length of the horizontal section is 40 mm to 80 mm, the width is 20 mm to 35 mm, and the thickness is 5 mm to 10 mm; the height of the vertical section is 30 mm to 60 mm, and the width is the same as that of the horizontal section. The upper end of the vertical section is provided with a blade mounting groove, the depth of which is 3 mm to 8 mm, and the width is 1.1 to 1.3 times the thickness of the blade. The cutting blade is fixedly installed in the blade mounting groove by clamping bolts.

[0032] Furthermore, in the above technical solution, the clamping rod 41 has an arc-shaped curved structure with an arc radius of 80 mm to 150 mm, a total length of 120 mm to 200 mm, and a rod diameter of 8 mm to 15 mm; the clamping head is elliptical and flat, with a major axis of 20 mm to 35 mm, a minor axis of 12 mm to 20 mm, a thickness of 3 mm to 6 mm, and multiple parallel anti-slip grooves on the lower surface of the clamping head with a depth of 0.5 mm to 1.5 mm.

[0033] Furthermore, in the above technical solution, the hinge shaft is made of stainless steel with a diameter of 6 mm to 12 mm. The hinge shaft passes through the shaft hole on the side of the base 1 and the rear shaft hole of the clamping rod 41. The diameter of the shaft hole is 0.2 mm to 0.5 mm larger than the diameter of the hinge shaft, forming a rotational clearance. The clamping spring 42 is made of spring steel with a free length of 25 mm to 45 mm and a spring constant of 200 N / m to 500 N / m. One end of the clamping spring 42 abuts against the upper surface of the base 1, and the other end abuts against the lower surface of the middle section of the clamping rod 41.

[0034] Furthermore, in the above technical solution, the upper surface of the base 1 has multiple horizontally distributed positioning grooves. The positioning grooves have a rectangular cross-section, a groove depth of 1 mm to 3 mm, a groove width of 2 mm to 5 mm, and a spacing of 8 mm to 15 mm between adjacent positioning grooves.

[0035] Furthermore, in the above technical solution, the cutting blade has a trapezoidal cross-section structure, the length of the upper base of the trapezoidal cross-section is the blade thickness, the length of the lower base is 2 to 3 times the length of the upper base, and the height of the trapezoid is one-third to one-half of the blade width.

[0036] Furthermore, in the above technical solution, the upper end of the positioning baffle 5 has an arc-shaped structure with an arc radius of 8 mm to 15 mm, the thickness of the positioning baffle 5 is 3 mm to 8 mm, and the height of the positioning baffle 5 in the vertical direction is 1.5 to 2.5 times the maximum thickness of the ticket.

[0037] Furthermore, in the above technical solution, the connection between the upper transverse portion and the lower protruding portion of the T-shaped cross-section of the sliding guide rail 2 is provided with a chamfer structure, the chamfer angle is 30 degrees to 60 degrees, and the chamfer depth is 0.5 mm to 2 mm.

[0038] The following is a specific embodiment 1 of this utility model: In this embodiment, the base 1 is made of 6061 aluminum alloy, and has an overall size of 300 mm in length, 180 mm in width, and 15 mm in thickness, forming a rectangular flat plate. The surface of the base 1 is anodized, providing good corrosion resistance and aesthetics. A longitudinal groove is located at the geometric center of the upper surface of the base 1. The groove is 240 mm long, 20 mm wide, and 5 mm deep. Both ends of the groove have a 3 mm radius arc transition. The bottom surface of the groove is precision milled, with a surface roughness controlled within Ra1.6. The left and right edges of the base 1 are bent upwards to form sidewalls with a height of 15 mm. The sidewalls maintain a strict 90-degree right angle with the upper surface of the base 1, and the bends are rounded with a radius of 2 mm. The sliding guide rail 2 is made of 304 stainless steel, with a total length of 260 mm. The upper horizontal section of the T-shaped cross-section is 23 mm wide and 4.5 mm thick, while the lower protruding section is 17 mm wide and 3 mm thick. The guide rail surface is polished to achieve a mirror finish, reducing sliding friction. Three equidistant M6 threaded holes, 40 mm apart, are provided on the upper surface of the guide rail for fixing the cutting blade holder 3. The cutting blade holder 3 is made of 45# carbon steel, with an overall heat treatment to achieve a hardness of HRC45-50. The horizontal section of the L-shaped structure is 60 mm long, 28 mm wide, and 8 mm thick, while the vertical section is 45 mm high. The upper blade mounting groove is 5 mm deep and 2.5 mm wide, with a surface roughness controlled within Ra0.8. The cutting blade is made of SKD11 alloy tool steel, with a length of 50 mm, a width of 20 mm, and a thickness of 2 mm. The blade is precision ground, maintaining a sharpness within 0.05 mm. The angle between the blade and the base 1 is set at 22 degrees. The clamping rod 41 of the clamping mechanism 4 is made of 6063 aluminum alloy, with an arc-shaped bend and a radius of curvature of 115 mm. The total length is 160 mm, and the rod diameter is 12 mm. The surface is anodized. The clamping head has an elliptical flat structure with a major axis of 28 mm, a minor axis of 16 mm, and a thickness of 4 mm. The lower surface has eight parallel anti-slip grooves spaced 2 mm apart and 1 mm deep. The hinge shaft is made of stainless steel with a diameter of 8 mm and a shaft hole diameter of 8.3 mm, forming a rotation clearance of 0.15 mm. The compression spring 42 is made of 65Mn spring steel wire with a wire diameter of 2 mm, an outer diameter of 18 mm, a free length of 35 mm, a spring constant of 350 N / m, and a working compression of 8-12 mm. The positioning baffle 5 is made of ABS engineering plastic, with dimensions of 180 mm in length, 60 mm in width, and 5 mm in thickness, and a 12 mm radius at the top arc. It is fixed to the front end of the base 1 with four M4 bolts. The upper surface of the base 1 also has 10 transverse positioning grooves, each 3 mm wide and 2 mm deep, spaced 12 mm apart, providing precise positioning for documents of different sizes.The entire set of equipment weighs approximately 2.5 kg after assembly. It has a compact structure and is easy to carry and store.

[0039] The following is another specific embodiment 2 of this utility model: This embodiment 2 is based on embodiment 1, and the pressing mechanism 4 has been improved and optimized. The arc bending radius of the pressing rod 41 is adjusted to 100 mm, and the rod diameter is increased to 15 mm to improve structural strength. The elliptical dimensions of the pressing head are adjusted to a major axis of 32 mm and a minor axis of 18 mm, the thickness is increased to 5 mm, the number of anti-slip grooves is increased to 12, the groove depth is increased to 1.2 mm, and the spacing is reduced to 1.5 mm, forming a denser anti-slip surface. The parameters of the pressing spring 42 have been redesigned, the spring constant is adjusted to 280 N / m, and the free length is increased to 40 mm to accommodate a wider range of document thickness variations. At the same time, an adjusting nut is added to the middle section of the pressing rod 41. By rotating the adjusting nut, the pre-compression of the spring can be changed, realizing the manual fine-tuning function of the pressing force. The adjusting nut is made of brass material, with an outer diameter of 20 mm, a thread specification of M10×1.5, and a knurled surface for easy manual operation. This improved design makes the equipment more adaptable to documents of different materials and thicknesses, making it particularly suitable for office environments that need to process documents of various sizes. The adjustable clamping force provides operators with greater operational flexibility.

[0040] The following is another specific embodiment 3 of this utility model: Embodiment 3 is based on Embodiment 1, with improvements made to the precision of the mating structure between the sliding guide rail 2 and the base 1 groove. The machining precision of the groove is improved to IT7 level, with the groove width tolerance controlled within ±0.05 mm and the groove depth tolerance controlled within ±0.03 mm. The surface roughness of the groove bottom and groove wall both reach a precision machining level of Ra0.4. The T-shaped cross-sectional dimensions of the sliding guide rail 2 have been optimized and adjusted. The width of the upper horizontal portion is precisely controlled to be 22 mm, and the thickness to be 4 mm. The width of the lower protruding portion is 16 mm, and the thickness to be 2.5 mm. The dimensional tolerances of each part are controlled within ±0.02 mm. Multiple chamfer structures are added at the T-shaped cross-section connection of the sliding guide rail 2, with a chamfer angle set at 45 degrees and a chamfer depth of 1 mm, forming a smooth transition surface. The material of the sliding guide rail 2 is 316L stainless steel, which has better corrosion resistance and hardness. To further improve sliding performance, a solid lubricating coating with a thickness of 0.01-0.02 mm is applied to the inner surface of the slide groove and the contact surface of the sliding guide rail 2, significantly reducing the coefficient of sliding friction. This high-precision fit design makes the movement of the cutting blade holder 3 smoother and more stable, further improving cutting accuracy. It is particularly suitable for precision document processing operations with extremely high cutting quality requirements, and the service life of the equipment is also significantly extended.

[0041] Specifically, the principle of this utility model is to achieve high-precision edge cutting of documents through the organic combination of a precise mechanical guiding system and an adaptive clamping system. Its core principle is reflected in four technological innovations. First, the guiding precision principle: a T-shaped sliding guide rail and a base groove are used in conjunction. The lower protruding part of the T-shaped structure forms a double-sided guiding constraint within the groove, while the upper horizontal part bears the vertical load. This structure effectively eliminates lateral forces and torsional moments during the cutting process, ensuring the cutter moves precisely along a predetermined trajectory. Second, the adaptive clamping principle: an arc-shaped clamping rod is rotatably connected via a hinge shaft. Combined with the constant elastic force provided by the clamping spring, the clamping rod automatically adjusts the clamping angle and contact area when the document thickness changes, achieving uniform clamping of documents of different thicknesses and avoiding the limitations of traditional fixed clamping methods. Third, the multi-positioning principle: a positioning baffle provides a front-end reference positioning for the document, and a horizontal positioning groove on the base provides a lateral positioning reference. The two work together to form a spatial position constraint on the document, ensuring the consistency of the document's position during each cut. Fourthly, the cutting principle is optimized. The trapezoidal cross-section blade design combines the requirements of sharpness and strength. The acute angle between the blade and the base generates a shearing effect, reducing cutting resistance and improving cutting quality. At the same time, the L-shaped tool holder structure ensures the perpendicularity and stability of the blade, avoiding vibration and deviation during the cutting process.

[0042] The specific operation or use method of this utility model is as follows: First, place the document edge cutter on a stable workbench and check the connection status of each component to ensure that the equipment is in normal working condition. During operation, first place the document to be cut flat, with one end tightly against the positioning baffle, and the side edge of the document aligned with the corresponding positioning groove on the base to ensure accurate document positioning. Then, press the clamping lever of the clamping mechanism, using the elastic force of the clamping spring to press the document firmly onto the base. The anti-slip texture of the clamping head forms good frictional contact with the document surface, preventing the document from moving during the cutting process. Next, hold the cutting blade holder and push it forward along the sliding guide rail. The sliding guide rail slides smoothly in the groove, driving the cutting blade holder and blade forward. The blade gradually contacts the edge of the document and begins the cutting operation. Maintain a uniform speed and stable force during the pushing process, avoiding excessively fast or slow movement speeds. When the blade has completely passed the edge of the document, the cutting is complete. Finally, release the clamping lever, remove the cut document, and pull the cutting blade holder back to the starting position to prepare for the next cutting operation. The entire operation process is simple and intuitive, requiring no special skills training. Operators only need to master the basic steps of placing, pressing, cutting, and taking out to complete high-quality document edge trimming.

Claims

1. A document edge trimmer, characterized in that, include: The system comprises a base, a sliding guide rail, a cutting blade holder, a clamping mechanism, and a positioning baffle. The base is made of aluminum alloy and has a rectangular flat structure. The upper surface of the base has a longitudinally extending groove with a depth of 3 mm to 8 mm and a width of 15 mm to 25 mm. The sliding guide rail is made of stainless steel and has a slender strip structure. The cross-section of the sliding guide rail is T-shaped, with the lower end of the T-shaped cross-section protruding and embedded in the groove. The sliding guide rail is slidably connected to the base along the groove direction. The cutting blade holder is made of carbon steel and has an L-shaped structure. The horizontal section of the cutting blade holder is fixedly connected to the upper surface of the sliding guide rail, and the vertical section of the cutting blade holder extends upwards, with the upper end of the vertical section fixedly mounted on... Equipped with a cutting blade made of alloy steel, the blade is straight and its cutting edge forms an acute angle of 15 to 30 degrees with the upper surface of the base. The clamping mechanism includes a clamping rod and a clamping spring. The clamping rod is made of aluminum alloy and is long and slender. One end of the clamping rod is rotatably connected to the side of the base via a hinge shaft, and the other end of the clamping rod is equipped with a clamping head, which is flat. The clamping spring is located between the clamping rod and the base to provide downward elastic force to the clamping rod. The positioning baffle is made of plastic and has a rectangular plate structure. The lower end of the positioning baffle is fixedly connected to the front edge of the base by bolts. The positioning baffle is set perpendicular to the upper surface of the base to limit the feeding position of the document.

2. The document edge trimmer according to claim 1, characterized in that, The left and right edges of the base are bent upward to form sidewalls, the height of which is 10 mm to 20 mm, and the sidewalls are at a 90-degree right angle to the upper surface of the base. The slide is opened in the center of the upper surface of the base, and the longitudinal length of the slide accounts for 80% to 95% of the total length of the base. Both ends of the slide are provided with arc-shaped transition structures with an arc radius of 2 mm to 5 mm.

3. The document edge trimmer according to claim 2, characterized in that, In the T-shaped cross-section of the sliding guide rail, the width of the upper horizontal portion is 18 mm to 28 mm and the thickness is 3 mm to 6 mm, and the width of the lower protruding portion is 12 mm to 22 mm and the thickness is 2 mm to 4 mm; the upper surface of the sliding guide rail is provided with at least 3 equally spaced threaded holes, the diameter of which is 4 mm to 8 mm, and the threaded holes are used to connect with the horizontal section of the cutting blade holder by bolts.

4. A document edge trimmer according to claim 3, characterized in that, In the L-shaped structure of the cutting blade holder, the horizontal section has a length of 40 mm to 80 mm, a width of 20 mm to 35 mm, and a thickness of 5 mm to 10 mm; the vertical section has a height of 30 mm to 60 mm and a width the same as the horizontal section. The upper end of the vertical section is provided with a blade mounting groove, the depth of which is 3 mm to 8 mm and the width is 1.1 to 1.3 times the thickness of the blade. The cutting blade is fixedly installed in the blade mounting groove by clamping bolts.

5. A document edge trimmer according to claim 4, characterized in that, The clamping rod has an arc-shaped curved structure with an arc radius of 80 mm to 150 mm, a total length of 120 mm to 200 mm, and a diameter of 8 mm to 15 mm. The clamping head is elliptical and flat with a major axis of 20 mm to 35 mm, a minor axis of 12 mm to 20 mm, a thickness of 3 mm to 6 mm, and multiple parallel anti-slip grooves on the lower surface of the clamping head with a depth of 0.5 mm to 1.5 mm.

6. A document edge trimmer according to claim 5, characterized in that, The hinge shaft is made of stainless steel and has a diameter of 6 mm to 12 mm. The hinge shaft passes through the shaft hole on the side of the base and the rear shaft hole of the clamping rod. The diameter of the shaft hole is 0.2 mm to 0.5 mm larger than the diameter of the hinge shaft to form a rotational clearance. The clamping spring is made of spring steel and has a free length of 25 mm to 45 mm and a spring constant of 200 N / m to 500 N / m. One end of the clamping spring abuts against the upper surface of the base, and the other end abuts against the lower surface of the middle section of the clamping rod.

7. A document edge trimmer according to claim 6, characterized in that, The upper surface of the base has multiple horizontally distributed positioning grooves. The positioning grooves have a rectangular cross-section, a groove depth of 1 mm to 3 mm, a groove width of 2 mm to 5 mm, and a spacing of 8 mm to 15 mm between adjacent positioning grooves.

8. A document edge trimmer according to claim 7, characterized in that, The cutting blade has a trapezoidal cross-section structure. The length of the upper base of the trapezoidal cross-section is equal to the blade thickness, the length of the lower base is 2 to 3 times the length of the upper base, and the height of the trapezoid is one-third to one-half of the blade width.

9. A document edge trimmer according to claim 8, characterized in that, The upper end of the positioning baffle has an arc-shaped structure with an arc radius of 8 mm to 15 mm. The thickness of the positioning baffle is 3 mm to 8 mm, and the height of the positioning baffle in the vertical direction is 1.5 to 2.5 times the maximum thickness of the ticket.

10. A document edge trimmer according to claim 9, characterized in that, The connection between the upper transverse portion and the lower protruding portion of the T-shaped cross-section of the sliding guide rail is provided with a chamfer structure, the chamfer angle is 30 degrees to 60 degrees, and the chamfer depth is 0.5 mm to 2 mm.

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