Laboratory width setting sampling knife

Abstract

The utility model provides a kind of laboratory fixed-width sampling knife, it is related to the technical field of laboratory cutter, including upper knife box and lower knife box mirror image alignment and engagement form cavity, first blade, fixed-width strip and second blade are arranged in order from top to bottom in cavity, and strip hole is set in the length direction on the surface of fixed-width strip;Sliding assembly includes sliding rod, spring holder, spring and push twist, sliding rod is vertically inserted into strip hole, and the both ends of sliding rod are integrally formed with spring holder, the spring holder of top is connected with the tail of first blade, and the spring holder of bottom is connected with the tail of second blade;Spring is inserted into spring holder, and the top end of upper knife box and lower knife box is provided with tooth on one side opening, spring and tooth abut, the side of the two spring holders away from is provided with button, solve the technical problem of low efficiency of multiple cutting and the width of sample obtained is inconsistent in the prior art, achieve the technical effect of direct cutting, the same sampling width and improve efficiency.

Description

Technical Field

[0001] This utility model relates to the field of laboratory cutting tool technology, and in particular to a laboratory fixed-width sampling knife. Background Technology

[0002] In laboratory settings, performance testing of thin films such as substrates and protective films, as well as adhesive tapes, is routine work. Fixed-width sampling is a crucial pretreatment step before testing. This step requires obtaining samples of a fixed width to ensure the accuracy and comparability of subsequent performance tests such as tensile and peel tests.

[0003] Currently, when sampling substrates, protective films, and tapes in the laboratory to determine the required width, the tools used are mainly divided into two parts: width-determining auxiliary components and cutting tools. The width-determining auxiliary components are mostly width-determining plates or steel rulers, used to determine the target width of the sample; the cutting tools are mainly ordinary utility knives. The operator needs to first use the width-determining auxiliary components to mark the width on the material, and then use the utility knife to cut along the marked lines to finally obtain the required sample.

[0004] Therefore, existing laboratory sampling knives lack an integrated structure with width-fixing functionality. Since the width-fixing auxiliary component is independent of the cutting blade, operators must repeatedly align the width-fixing component, cut, and adjust its position during sampling. This not only requires multiple cuts to cut the material, resulting in low sampling efficiency, but also makes it easy for slight hand deviations to cause the cutting trajectory to deviate from the marked line, ultimately leading to inconsistent sample widths that fail to meet the accuracy requirements for sample dimensions in testing. Utility Model Content

[0005] The purpose of this invention is to provide a laboratory fixed-width sampling knife to alleviate the technical problems of low efficiency from multiple cuts and inconsistent sample widths in the prior art.

[0006] The laboratory fixed-width sampling knife provided by this utility model includes: an upper knife box, a lower knife box, a fixed-width strip, a first blade, a second blade, and a sliding assembly; The upper and lower tool holders are mirror-aligned and locked together to form a cavity. The first blade, the width-fixing strip, and the second blade are arranged sequentially from top to bottom inside the cavity. The surface of the width-fixing strip has a strip hole along its length. The sliding assembly includes a sliding rod, a spring holder, a spring, and a push button. The sliding rod is vertically inserted into the strip hole. Both ends of the sliding rod are integrally formed with spring holders. The top spring holder is connected to the tail of the first blade, and the bottom spring holder is connected to the tail of the second blade. A spring is inserted into the spring holder. The top of the upper and lower blade magazines has teeth on one side. The spring abuts against the teeth. A button is provided on the opposite side of the two spring holders.

[0007] Furthermore, both the first and second blades have several break lines on their surfaces, each break line dividing the first or second blade into two segments.

[0008] Furthermore, the upper and lower tool magazines have chamfered edges on the sides where the retaining teeth are located.

[0009] Furthermore, the surfaces of the top and bottom spring clip holders on opposite sides have protrusions, and the tails of the first and second blades are provided with round holes. The protrusions are inserted into the round holes to push the first and second blades to extend horizontally by a pusher.

[0010] Furthermore, the upper and lower tool holders are provided with concentric fixing holes at their tails, and fastening bolts are threaded into the fixing holes, passing through the width-fixing strip; the fastening bolts are covered with plastic caps.

[0011] Furthermore, the thickness of the width strip is 5mm, 10mm or 15mm.

[0012] Furthermore, the lengths of the first and second blades are 135mm to 155mm, and the widths of the first and second blades are 13mm to 16mm.

[0013] Furthermore, the outer surface of the push-twist mechanism is provided with a diamond-shaped anti-slip texture.

[0014] Beneficial effects: The laboratory width-fixing sampling knife provided by this utility model integrates the first blade, width-fixing strip, and second blade into one unit through the cavity formed by the engagement of the upper and lower blade holders. There is no need to use an additional width-fixing plate or steel ruler. The width-fixing strip can directly serve as a fixed reference for the distance between the two blades, avoiding the width deviation that is prone to occur in the step-by-step operation of traditional marking and then cutting. At the same time, the sliding rod passes vertically through the width-fixing strip, and the spring clips at both ends are connected to the tails of the upper and lower blades respectively. Pushing the pusher can drive the two blades to extend or retract synchronously, ensuring that the extension length of the two blades is consistent, effectively preventing the cutting surface from tilting, achieving one-time cutting, and significantly improving sampling efficiency.

[0015] In addition, the spring clip engages with the spring clip holder and abuts against the teeth at the blade magazine opening. After adjusting the blade extension length, the elastic force of the spring clip can tightly engage with the teeth, restricting the autonomous movement of the sliding component and improving operational safety. The strip hole can provide precise guidance to prevent the sliding component from deviating, further ensuring the parallelism of the double blade movement trajectory and ensuring the consistency of sampling size. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of the laboratory fixed-width sampling knife provided in this embodiment of the utility model; Figure 2 A disassembly diagram of the laboratory fixed-width sampling knife provided in this embodiment of the utility model; Figure 3 A schematic diagram of the sliding assembly of the laboratory fixed-width sampling knife provided in an embodiment of this utility model; Figure 4 This is a top view of the spring in the sliding assembly of the laboratory fixed-width sampling knife provided in an embodiment of the present invention.

[0018] Icons: 1-Upper blade holder; 2-Lower blade holder; 3-Width fixing bar; 301-Strip hole; 4-First blade; 5-Second blade; 6-Sliding assembly; 601-Sliding rod; 602-Spring holder; 603-Spring; 604-Push knob; 7-Tooth; 8-Chamfered part; 9-Fastening bolt; 10-Plastic cap. Detailed Implementation

[0019] 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. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] like Figures 1-4 As shown, the laboratory fixed-width sampling knife provided by this utility model includes: an upper knife box 1, a lower knife box 2, a fixed-width strip 3, a first blade 4, a second blade 5, and a sliding assembly 6; The upper blade holder 1 and the lower blade holder 2 are mirror-aligned and locked together to form a cavity. The first blade 4, the width-fixing strip 3 and the second blade 5 are arranged sequentially from top to bottom in the cavity. The surface of the width-fixing strip 3 has a strip hole 301 along the length direction. The sliding assembly 6 includes a sliding rod 601, a spring holder 602, a spring 603, and a pusher 604. The sliding rod 601 is vertically inserted into the fixed width bar 3. Both ends of the sliding rod 601 are integrally formed with spring holders 602. The top spring holder 602 is connected to the tail of the first blade 4, and the bottom spring holder 602 is connected to the tail of the second blade 5. The spring 603 is inserted into the spring holder 602. The top of the upper blade box 1 and the lower blade box 2 are provided with teeth 7. The spring 603 abuts against the teeth 7. The pusher 604 is provided on the opposite side of the two spring holders 602.

[0027] Specifically, the upper tool holder 1 and the lower tool holder 2 are mirror-aligned along the vertical centerline, and their edges are provided with matching positioning structures. The bottom of the inner wall of the upper tool holder 1 is provided with three evenly distributed cylindrical positioning protrusions, and the top of the inner wall of the lower tool holder 2 is provided with three positioning holes that are interference fit with the positioning protrusions. At the same time, the bottom of the left and right side walls of the upper tool holder 1 is provided with L-shaped retaining edges, and the top of the left and right side walls of the lower tool holder 2 is provided with retaining platforms that are adapted to the L-shaped retaining edges. Through the precise positioning of the positioning protrusions and positioning holes, and the fastening of the L-shaped retaining edges and retaining platforms, the two enclose a closed cavity with a rectangular cross-section. The first blade 4, the width-fixing strip 3, and the second blade 5 are arranged in parallel from top to bottom inside the cavity. All three extend along the length of the cavity, with the width-fixing strip 3 sandwiched between the two. A strip-shaped hole 301 is opened on the end face of the width-fixing strip 3 along the length direction. The strip-shaped hole 301 is located on the horizontal center line of the width-fixing strip 3. The diameter of the hole is 0.2mm larger than the diameter of the sliding rod 601, ensuring that the sliding rod 601 can slide smoothly along the strip-shaped hole 301 without significant shaking. In the sliding assembly 6, the sliding rod 601 is vertically inserted into the strip-shaped hole 301 of the fixed-width strip 3, with its upper and lower ends extending out of the upper and lower openings of the strip-shaped hole 301, respectively. Both the upper and lower ends of the sliding rod 601 are integrally stamped with spring clip holders 602. The height of the spring clip holders 602 is adapted to the height of the blade tail. The top spring clip holder 602 has a circular protrusion on the side facing the first blade 4, into which the tail of the first blade 4 is embedded. The bottom spring clip holder 602 has a circular protrusion of the same specification on the side facing the second blade 5, into which the tail of the second blade 5 is embedded. It should be embedded and fixed; each spring holder 602 has a rectangular groove on the side opposite to the sliding rod 601, and the spring 603 is inserted into the rectangular groove to achieve fixation; the top side wall of the upper knife box 1 and the lower knife box 2 is provided with serrated teeth 7 with a spacing of 1mm, and the bent end of the spring 603 abuts tightly with the teeth 7; a pusher 604 is fixed on the opposite side of the two spring holders 602, the axis of the pusher 604 is perpendicular to the axis of the sliding rod 601, and its end away from the spring holder 602 protrudes out of the strip opening of the upper knife box 1 and the lower knife box 2.

[0028] By integrating the blade holder's locking cavity with the internal components, width fixing and cutting are achieved. The width fixing strip 3 directly serves as the spacing reference for the first blade 4 and the second blade 5, eliminating the need for an additional width fixing plate or steel ruler. This eliminates the width deviation that is prone to occur with separate tools, ensuring that the sampling width is completely consistent with the thickness of the width fixing strip 3 each time. The integrated structure of the sliding rod 601 and the spring holder 602, combined with the blade tail and the slot fixing of the spring holder 602, ensures that when the push knob 604 is pushed, the first blade 4 and the second blade 5 extend or retract synchronously, avoiding the tilting of the cutting surface caused by the different extension lengths of the two blades. At the same time, the design of the two blades cutting upwards and downwards can cut films or tapes in one go without multiple cuts, improving efficiency. The abutment structure between the spring 603 and the teeth 7 achieves self-locking. After adjusting the blade extension length, the elastic force of the spring 603 will lock it between the teeth 7, preventing the blade from retracting due to force during the cutting process.

[0029] In the embodiments of this utility model, the surfaces of the first blade 4 and the second blade 5 are provided with a plurality of break lines, each break line dividing the first blade 4 or the second blade 5 into two segments.

[0030] The upper tool holder 1 and the lower tool holder 2 have a chamfered part 8 on one side edge of the toothed teeth 7.

[0031] The top and bottom spring clip holders 602 have protrusions on their opposite sides. The first blade 4 and the second blade 5 have round holes at their tails. The protrusions are inserted into the round holes and are used to push the first blade 4 and the second blade 5 to extend horizontally by the pusher 604.

[0032] Specifically, both the first blade 4 and the second blade 5 are high-carbon steel blades. Multiple break lines are formed along the length of both blades, with a spacing of 6-8 mm between adjacent break lines. The depth of each break line is half the blade thickness (blade thickness 0.5 mm, break line depth 0.25 mm). The break lines divide the first blade 4 or the second blade 5 into several equal-length segments along the length. The length of each segment matches the cavity length of the upper blade holder 1 and the lower blade holder 2, ensuring that the blade remains stably embedded in the cavity after segmentation. One edge of the upper blade holder 1 and the lower blade holder 2 has teeth 7 (i.e., the outer edge of the strip-shaped opening), integrally machined with a chamfer 8. The chamfer 8 mates with the break lines for easy breaking. The blade break lines reduce tool replacement costs and operation time. When the blade wears, the worn segment can be precisely broken along the break lines, allowing for direct use of a new blade segment without the need for a complete tool replacement.

[0033] The top surfaces of both the top and bottom spring clip holders 602 are integrally formed with a hemispherical protrusion. The center of the tail end of the first blade 4 and the second blade 5 is provided with a circular hole. The protrusion and the circular hole are interference fit and are inserted into the circular hole to form a detachable snap-fit ​​structure. When the push-twist 604 is pushed, the spring clip holder 602 drives the first blade 4 and the second blade 5 to extend synchronously along the horizontal blade magazine length direction through the protrusion and the circular hole.

[0034] In an embodiment of this utility model, the upper blade box 1 and the lower blade box 2 are provided with concentric fixing holes at their tails. Fastening bolts 9 are threaded into the fixing holes and pass through the width-fixing strip 3. The fastening bolts 9 are covered with plastic caps 10.

[0035] The thickness of the fixed-width strip 3 is 5mm, 10mm or 15mm.

[0036] The length of the first blade 4 and the second blade 5 is 135mm to 155mm, preferably 155mm, and the width of the first blade 4 and the second blade 5 is 13mm to 16mm, preferably 16mm.

[0037] The outer surface of the push-twist 604 has a diamond-shaped anti-slip texture.

[0038] Specifically, the upper tool holder 1 and the lower tool holder 2 each have a concentric circular fixing hole at their tails. This fixing hole penetrates the front and rear side walls of the tool holder, and its diameter matches the thread diameter of the fastening bolt 9. The tail of the width-fixing bar 3, corresponding to the fixing hole, has a through hole that matches the shank of the fastening bolt 9. The fastening bolt 9 passes sequentially through the fixing hole in the upper tool holder 1, the through hole in the width-fixing bar 3, and the fixing hole in the lower tool holder 2, and is then locked in place by a threaded connection, ensuring that the internal components of the cavity do not loosen relative to each other. The fastening bolt 9 is covered with a plastic cap 10, which is made of soft PVC material.

[0039] The width-fixing strip 3 comes in three thicknesses: 5mm, 10mm, and 15mm, all made of stainless steel. The width-fixing strips 3 of different thicknesses are identical in length, width, and the dimensions of the slot 301; only the thickness differs. The first blade 4 and the second blade 5 are both rectangular high-carbon steel blades, with a length range of 135mm to 155mm (preferably 155mm to maximize the effective cutting section) and a width range of 13mm to 16mm (preferably 16mm to prevent left-right wobbling after the blade is engaged). The outer surface of the push-touch 604 is pressed with a diamond-shaped anti-slip texture, with no sharp protrusions between adjacent textures, and the texture covers the entire area of ​​the push-touch 604 exposed to the blade magazine opening.

[0040] Fastening bolt 9 locks the relative positions of the upper blade holder 1, lower blade holder 2, and width-fixing bar 3, preventing sampling width deviation caused by component misalignment during cutting. Soft plastic cap 10 improves comfort. Multiple thickness specifications of the width-fixing bar 3 and optimized blade dimensions adapt to different laboratory cutting and sampling requirements. The diamond-shaped anti-slip texture of the push knob 604 significantly increases the friction between the fingers and the push knob 604, stably pushing the push knob 604 to adjust blade extension and retraction, avoiding operational errors caused by slippage, and adapting to high-frequency sampling scenarios in laboratories.

[0041] Based on the above embodiments, the specific working process of the laboratory fixed-width sampling knife provided by this utility model is as follows: Based on the target sampling width, select a fixed width strip 3 with a thickness of 5mm, 10mm or 15mm; push the pusher 604 to drive the sliding rod 601 to move along the strip hole 301 of the fixed width strip 3, so that the spring holder 602 drives the first blade 4 and the second blade 5 to extend synchronously, and the spring 603 engages with the teeth 7 of the blade magazine to lock the blade extension length.

[0042] Place the film or tape material to be sampled between the first blade 4 and the second blade 5, and adhere the material with the width reference strip 3 as the width reference; move the knife box at a constant speed along the length of the material, and the upper and lower blades cut the material simultaneously, cutting the material in one go, and obtaining a sample with the same thickness as the width reference strip 3.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A laboratory fixed-width sampling knife, characterized in that, include: Upper blade holder (1), lower blade holder (2), width-fixing bar (3), first blade (4), second blade (5), and sliding assembly (6); The upper blade holder (1) and the lower blade holder (2) are mirror-aligned and locked together to form a cavity. The first blade (4), the width-fixing strip (3) and the second blade (5) are arranged sequentially from top to bottom in the cavity. The surface of the width-fixing strip (3) has a strip-shaped hole (301) along the length direction. The sliding assembly (6) includes a sliding rod (601), a spring holder (602), a spring (603), and a pusher (604). The sliding rod (601) is vertically inserted into the strip hole (301). Both ends of the sliding rod (601) are integrally formed with the spring holder (602). The top spring holder (602) is connected to the tail of the first blade (4), and the bottom spring holder (602) is connected to the tail of the second blade (5). The spring (603) is inserted into the spring holder (602). The top of the upper blade box (1) and the lower blade box (2) are provided with teeth (7). The spring (603) abuts against the teeth (7). The pusher (604) is provided on the opposite side of the two spring holders (602).

2. The laboratory fixed-width sampling knife according to claim 1, characterized in that, Both the first blade (4) and the second blade (5) have several break lines on their surfaces, and each break line divides the first blade (4) or the second blade (5) into two segments.

3. The laboratory fixed-width sampling knife according to claim 2, characterized in that, The upper cutter box (1) and the lower cutter box (2) have chamfered portions (8) on one side edge of the teeth (7).

4. The laboratory fixed-width sampling knife according to claim 1, characterized in that, The top and bottom surfaces of the spring holder (602) have protrusions. The first blade (4) and the second blade (5) have round holes at their tails. The protrusions are inserted into the round holes and are used to push the first blade (4) and the second blade (5) to extend horizontally by the pusher (604).

5. The laboratory fixed-width sampling knife according to claim 1, characterized in that, The upper cutter box (1) and the lower cutter box (2) are provided with concentric fixing holes at their tails. Fastening bolts (9) are threaded into the fixing holes and pass through the width-fixing strip (3). The fastening bolts (9) are covered with plastic caps (10).

6. The laboratory fixed-width sampling knife according to claim 1, characterized in that, The thickness of the fixed-width strip (3) is 5mm, 10mm or 15mm.

7. The laboratory fixed-width sampling knife according to claim 1, characterized in that, The lengths of the first blade (4) and the second blade (5) are 135mm to 155mm, and the widths of the first blade (4) and the second blade (5) are 13mm to 16mm.

8. The laboratory fixed-width sampling knife according to claim 1, characterized in that, The outer surface of the push knob (604) is provided with a diamond-shaped anti-slip texture.

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