A film cutting device for a single reagent tube

Abstract

This utility model discloses a film cutting device for single reagent tubes, relating to the field of cutting devices. It includes a limiting seat, a lead screw module, and a cutting assembly. The limiting seat is connected to the lead screw module and is used to load and limit the material to be cut. The lead screw module can drive the limiting seat to move on the lead screw module. The cutting assembly is mounted above the lead screw module and includes several cutting blades for cutting. This cutting device, through the coordinated arrangement of the lead screw module, cutting assembly, and limiting seat, can perform bidirectional cutting, has a high degree of automation, greatly improves cutting efficiency, and features a simple structure, low cost, high safety, and saves time and labor. It can cut multiple sets of reagent tubes in a short time.

Description

Technical Field

[0001] This utility model relates to the field of cutting devices, specifically to a film cutting device for single reagent tubes. Background Technology

[0002] In the field of in vitro diagnostics, deep-well plates are the most common laboratory consumables, serving multiple purposes including high-throughput screening, sample storage, sample processing, and injection. However, traditional 96-well and 384-well plates are inflexible, often resulting in many empty wells at lower throughputs, inevitably leading to resource waste and increased costs. Therefore, single-strip deep-well plates (i.e., single reagent tubes) are increasingly popular. To facilitate rapid experimentation and conserve reagents, manufacturers typically pre-package various reagents required for experiments into single-strip deep-well plates, forming reagent strips, and then seal them with a film to prevent leakage. To improve production efficiency, multiple single reagent tubes are often simultaneously filmed and then cut to separate them.

[0003] Manual cutting is often inefficient, difficult to guarantee cutting quality, and poses significant safety hazards. To address this, technicians have designed various cutting devices to meet the cutting needs of single reagent tube films. CN221736418U discloses a cutting device for a six-cell packaging film for nucleic acid extraction. It includes a base plate with a support frame fixed to it. A cylinder is fixed to the support frame, and a mounting plate is provided at the output end of the cylinder. A cutting blade is fixed to the bottom surface of the mounting plate. The cutting blade is used to cut the packaging films of multiple six-cell reagent tubes within the six-cell reagent tube holder. When the pressure frame contacts the top surface of the six-cell reagent tube holder, the cylinder continues to feed, pushing the mounting plate to slide along the pressure frame. This causes the cutting blade to penetrate the pressure frame and cut the packaging films of multiple six-cell reagent tubes, achieving automated and precise cutting operations. However, this pneumatic cutting method results in excessive resistance across the entire plane, affecting the sealing of the reagents within the six-piece cup and posing a risk of leakage. Furthermore, the equipment is noisy and is more suitable for cutting thinner plastic films, thicker paper, and non-woven fabrics. It requires specialized equipment and incurs high costs. Operation and maintenance require certain professional skills, and safety needs improvement. For example, CN219948773U discloses a cutting mechanism and sealing device, which includes a cutter, a cutter holder, a guide rail, and a base. The cutter has a cutting section and a connecting section, and the cutter is connected to the cutter holder through the connecting section. The cutter holder is slidably connected to the guide rail, one end of which is connected to the base, and the other end is provided with an anti-detachment section to prevent the cutter holder from derailing. The cutting section faces the anti-detachment section. In actual use, the packaged reagent strip is placed under the guide rail, and the handle is manually pulled to make the cutter holder slide on the guide rail, pushing the cutter holder past the reagent strip. During this process, the cutter can cut the packaging film. Therefore, although the cutting device solves the problem in the existing technology that it is impossible to ensure that the blade can slide in a straight line and avoid scratching the reagent strip, the operator still needs to manually pull the handle and then pull the blade holder during the cutting process. The cutting is unstable, time-consuming and labor-intensive, and the cutting efficiency is low. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems by providing a film cutting device for single reagent tubes. By setting up a lead screw module, a cutting component, and a limiting seat that work in concert, the lead screw module can drive the cutting component to perform bidirectional cutting, and multiple cutting blades can cut simultaneously. This results in a high degree of automation, which can greatly improve cutting efficiency, save time and effort, and ensure good cutting consistency.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A film cutting device for single reagent tubes, the device comprising:

[0007] The driving unit has a reagent tube receiving device slidably connected to it. The driving unit is provided with a slide rail that cooperates with the reagent tube receiving device. The reagent tube receiving device can slide back and forth along the slide rail.

[0008] The cutting section includes a cutting assembly mounted above the slide rail of the drive section. The cutting assembly has a plurality of cutting blades on the side opposite to the drive section. The plurality of cutting blades are used to cut the film when the reagent tube receiving device slides to the bottom of the cutting assembly.

[0009] Furthermore, the driving unit specifically includes:

[0010] A lead screw module includes a base, a slide rail laid on the base, a lead screw parallel to the slide rail on the base, a motor connected to the lead screw at one end of the base, a rotatable connection between the other end of the base and the lead screw, and a threaded connection between the lead screw and the reagent tube assembly receiving device.

[0011] Furthermore, the reagent tube receiving device specifically includes:

[0012] A support platform, which passes through a lead screw and is threadedly connected to the lead screw;

[0013] The bottom of the support platform is provided with a slider that fits into the slide rail;

[0014] The support platform is provided with a limiting platform, which is used to receive the reagent tube assembly.

[0015] Furthermore, the base is provided with an origin switch on the side near the motor. The origin switch is connected to the motor control mechanism, and the motor control mechanism receives the reference zero position provided by the origin switch to control the conveying distance of the motor driving the limit stage.

[0016] Furthermore, the limiting stage includes a base plate disposed on the support platform, the base plate having a plurality of baffles perpendicular to the base plate evenly disposed around its edge, and a micro switch embedded in the base surface, the baffles cooperating with the micro switch to limit the position of the reagent tube assembly.

[0017] Furthermore, the reagent tube assembly also includes a placement rack, which is embedded in the substrate through a baffle. The placement rack has multiple uniformly parallel reagent tube receiving cavities inside, and each reagent tube receiving cavity has a cutting groove on both sides that cooperates with the blade of the cutting knife.

[0018] Furthermore, the cutting component specifically includes:

[0019] A fixed bracket is provided on both sides of the base, perpendicular and symmetrical to the base, and a cutting blade assembly is mounted on the end of the fixed bracket away from the base;

[0020] A cutting blade assembly includes a blade holder, which is disposed between two fixed supports on both sides of a base. A plurality of cutting blades are disposed on the side of the blade holder opposite to the base. A clamping device is provided above the blade holder, with both ends of the clamping device extending out from both sides of the blade holder. A pressure plate is provided below the blade holder, with both sides of the pressure plate connected to the ends of the clamping device extending out from both sides of the blade holder via elastic elements. A plurality of blade outlet holes for cooperating with the cutting blades are opened on the side of the pressure plate opposite to the blade holder.

[0021] Furthermore, when the pressure plate is not subjected to external pressure, the blades of the plurality of cutting blades are located within the blade outlet holes of the pressure plate; after the pressure plate is subjected to external pressure, the blades of the plurality of cutting blades extend out of the blade outlet holes.

[0022] Furthermore, an elongated hole is provided at the connection between the fixed bracket and the tool holder. The elongated hole is opened along the base direction. The tool holder is connected to the elongated hole by bolts. The elongated hole is used to adjust the distance between the tool holder and the base.

[0023] Furthermore, several cutting blades are evenly arranged side by side on the blade holder, and the blade holder is provided with a limiting plate at the tail of the cutting blade. The limiting plate is used to position the blade holder in the front and back. The side of the cutting blade is positioned to the blade holder by screws.

[0024] Furthermore, the pressure plate includes a horizontal plate and a bent plate;

[0025] The horizontal plate is arranged opposite to the tool holder, and the tool outlet hole is opened on the horizontal plate;

[0026] The bending plates are located on both sides of the horizontal plate, and the bending plates are connected to the clamping device through elastic elements.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0028] 1. The film cutting device for single reagent tubes provided by this utility model can perform bidirectional cutting by setting up a screw module, a cutting component and a limiting seat that work together. It has a high degree of automation, greatly improves cutting efficiency, has a simple structure, low cost, and saves time and effort. The multiple cutting blades set in the cutting component can cut multiple sets of reagent tubes in a short time under the drive of the screw module.

[0029] 2. The film cutting device for single reagent tubes provided by this utility model, by setting an origin switch and a micro switch, provides a reference zero position to the motor control mechanism through the origin switch, and the micro switch is used to sense whether the material to be cut is placed in place and transmit the sensing signal to the motor control mechanism, thus doubly ensuring the motor's starting state and avoiding the cutting device from running idle and cutting errors caused by the material not being placed in place.

[0030] 3. The film cutting device for single reagent tubes provided by this utility model, by setting a cutting blade assembly with a clamping device, a blade holder, and a pressure plate, can not only flexibly adjust the height of the blade holder and control the clamping force of the clamping device according to the actual height of the material to be cut, but also ensure that the cutting blade is always hidden inside / upper part of the blade outlet when not in use, improving the safety of the operator; by adjusting the included angle between the two side plates of the pressure plate, the resistance of the reagent tube assembly entering the cutting area of ​​the pressure plate is reduced, and the film on the surface of the reagent tube assembly is prevented from being lifted, ensuring uniform and flat cutting. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a film cutting device for a single reagent tube according to this utility model. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the overall structure of a film cutting device for a single reagent tube according to this utility model. Figure 2 ;

[0033] Figure 3 This is a schematic diagram of the screw module of a film cutting device for a single reagent tube according to the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of a limiting seat for a film cutting device for a single reagent tube according to the present invention;

[0035] Figure 5 This is a schematic diagram of the cutting component of a film cutting device for a single reagent tube according to the present invention;

[0036] Figure 6 This is an exploded view of the structure of the cutting blade assembly of a film cutting device for single reagent tubes according to this utility model. Figure 1 ;

[0037] Figure 7 This is an exploded view of the structure of the cutting blade assembly of a film cutting device for single reagent tubes according to this utility model. Figure 2 ;

[0038] Figure 8 This is a side view of the cutting blade assembly of a film cutting device for single reagent tubes according to this utility model. Figure 1 ;

[0039] Figure 9 This is a side view of the cutting blade assembly of a film cutting device for single reagent tubes according to this utility model. Figure 2 ;

[0040] Figure 10This is a structural diagram of a reagent tube placement rack for a film cutting device for single reagent tubes according to this utility model.

[0041] Explanation of reference numerals in the attached figures:

[0042] 10-Lead screw module, 101-Motor, 102-Lead screw, 103-Base, 104-Support platform, 105-Slider, 106-Slide rail, 107-Origin switch;

[0043] 20-Cutting assembly, 201-Fixing bracket, 2010-Mounting hole, 202-Cutter assembly, 2021-Cutter holder, 2022-Clamping device, 2023-Pressure plate, 2024-Spring, 2025-Limiting plate, 2026-Cutter, 2027-Screw, 2028-Exit hole;

[0044] 30-Limit seat, 301-Baffle, 302-Micro switch

[0045] 40-Reagent tube assembly, 401-Placement rack, 402-Reagent tube receiving cavity, 403-Cutting groove. Detailed Implementation

[0046] The present invention will now be described in detail with reference to the accompanying drawings.

[0047] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0048] Example

[0049] This embodiment provides a film cutting device for single reagent tubes, such as... Figure 1 and Figure 2 As shown, this device is used to cut the film on the surface of multiple molecular diagnostic extraction reagent dispensing containers. The device includes a drive unit and a cutting unit connected together. The cutting unit is mounted above the drive unit. The drive unit drives the reagent tube assembly to move, and during the movement, the film of the reagent tube assembly is cut by the cutting unit mounted above the drive unit. Specifically, the drive unit and the cutting unit include: a lead screw module 10, a limiting seat 30, and a cutting assembly 20. The limiting seat 30 is connected to the lead screw module 10 and is used to load and limit the material to be cut. The lead screw module 10 can drive the limiting seat 30 to move on the lead screw module 10. The cutting assembly 20 is mounted above the lead screw module 10 and includes several cutting blades for cutting.

[0050] like Figure 3 and Figure 4As shown, in this embodiment, the lead screw module 10 includes a base 103, a motor 101, a lead screw 102, a slider 105, and a slide rail 106. The motor 101 is fixedly installed at one end of the base 103, and the output end of the motor 101 is connected to one end of the lead screw 102. The other end of the lead screw 102 is rotatably connected to the other end of the base 103. A support platform 104 is threaded through the lead screw 102. The support platform 104 is fixedly connected to the limiting seat 30 to bear the downward pressure of the material to be cut and the cutting component 20 when performing the cutting operation. In order to facilitate the smooth movement of the support platform 104, the lead screw module 10 also includes sliders 105 symmetrically arranged on both sides below the support platform 104 with the central axis of the lead screw 102 as the axis of symmetry. The sliders 105 are fixedly connected to the support platform 104 by screws. A slide rail 106 is provided on the base 103 to cooperate with the sliders 105. The sliders 105 and the slide rail 106 are fitted and slidably connected. To facilitate the identification of changes in the position of the support platform 104 on the lead screw 102 and thus control the working state of the motor 101, a home switch 107 is fixedly installed on the base 103 near the motor 101. The home switch 107 is used to provide a reference zero position to the motor control mechanism, thereby determining the conveying distance of the support platform 104. The motor control mechanism controls the forward and reverse rotation of the motor according to the position of the support platform 104 on the lead screw 102, thereby realizing the reciprocating movement of the limit seat 30 on the lead screw 102.

[0051] like Figure 4 As shown, the limiting seat 30 is fixedly installed on the support platform 104. Specifically, in this embodiment, the limiting seat 30 includes a rigid rectangular base plate. The shape of the base plate can be any structure, as long as it can stably place the placement rack 401. The base plate and the support platform 104 are fixedly connected by screws. Multiple baffles 301 are provided at the four corners of the base plate surface. When it is necessary to cut the reagent tube strips, the operator places the placement rack 401 on the base plate of the limiting seat 30. At this time, the inner surface of the baffle 301 can fit against the outer wall of the support column of the placement rack 401. Accordingly, the reagent tube placement rack 401 can be limited in front and back and left and right, so as to avoid the film cutting error on the reagent tube group caused by the displacement of the placement position of the reagent tube placement rack 401. In addition, in order to further accurately limit the position of the reagent tube holder 401 and avoid damage to the cutting blade caused by tilting the holder 401, at least one groove is provided on the substrate. A micro switch 302 is provided inside the groove to sense whether the reagent tube holder 401 is in place and feeds the sensing signal back to the motor control mechanism. The motor control mechanism controls whether the motor can be started based on the sensing signal of the micro switch 302. Specifically, in this embodiment, two grooves are provided on the substrate.

[0052] like Figure 2 and 5As shown, in this embodiment, the cutting assembly 20 includes fixed brackets 201 symmetrically arranged on both sides of the base 103. The fixed brackets 201 are perpendicular to the base 103. A cutting blade assembly 202 is horizontally mounted between the tops of the fixed brackets 201. The cutting blade assembly 202 is located above the limiting seat 30. Specifically, the cutting blade assembly 202 includes a clamping device 2022, a blade holder 2021, and a pressure plate 2023. The blade holder 2021 is provided with a plurality of cutting blades 2026. The blade holder 2021 is fixedly installed in the mounting holes 2010 on the fixed brackets 201 by screws. The mounting holes 2010 are elongated holes pointing towards the base, which are used to adjust the distance between the blade holder 2021 and the base. Specifically, in this embodiment, the mounting holes 2010 are arranged along the length of the fixed brackets 201, and the length is set to... The length is set at 25±5mm, the width is set at 4-6mm, preferably the length is set at 30mm and the width is set at 5mm. The number of elongated holes on one side of the fixing bracket 201 is set to 2, which are arranged in parallel. The clamping device 2022 is fixedly installed above the tool holder 2021. The pressure plate 2023 is set below the tool holder 2021 and is connected to the clamping device 2022 through an elastic element. In this embodiment, the elastic element is a spring. Specifically, the two ends of the clamping device 2022 extend out of the two sides of the tool holder 2021. The ends of the clamping device 2022 extending out of the two sides of the tool holder 2021 are connected to the two sides of the pressure plate 2023 through screws. The spring is sleeved on the screw. In this embodiment, the spring is a helical spring with a wire diameter of 1 to 1.5mm and an elastic coefficient between 2N / mm and 3N / mm.

[0053] like Figure 6 , Figure 7 and Figure 8 As shown, multiple sets of cutting blades 2026 are evenly arranged along the length of the blade holder 2021 at its bottom. To ensure that the cutting blades 2026 are in a fixed position, a limiting plate 2025 is fixedly installed at the tail of each cutting blade 2026 to limit its forward and backward positioning. Each cutting blade 2026 has a screw 2027 fixed to its side for left and right positioning. Specifically, in this embodiment, there are 9 cutting blades, capable of simultaneously cutting 8 reagent tube films. The cutting blades 2026 are positioned opposite to the pressure plate 2023, which has blade exit holes 2028 corresponding to the positions of the cutting blades 2026.

[0054] When the pressure plate 2023 comes into contact with the reagent tube assembly, the pressure plate 2023 is forced upward to compress the spring. The clamping device 2022 cooperates with the pressure plate 2023 to make the blade of the cutting knife 2026 protrude from the knife outlet 2028, thereby realizing the cutting of the film.

[0055] like Figure 8 and Figure 9As shown, the area opposite the pressure plate 2023 and the blade holder 2021 is a horizontal plate, which is the cutting area. The blade holes 2028 are evenly arranged in the horizontal plate area, so that the contact surface between the pressure plate 2023 and the reagent tube assembly is horizontal during the cutting process of the cutting blade 2026, ensuring the cutting effect. Specifically, the width of the horizontal plate can be set between 60 and 150 mm, and in this embodiment, it is preferably set to 118 mm; the length of the blade holes 2028 is between 20 and 50 mm, and in this embodiment, it is preferably set to 35 mm. Both sides of the pressure plate 2023 are curved upwards with a certain arc, and the included angle between the two sides is between 130 and 160°, preferably set to 140 and 150°. This is to reduce the resistance when the reagent tube assembly 40 enters the cutting area of ​​the pressure plate 2023, and to avoid lifting the film on the surface of the reagent tube assembly. Meanwhile, during the cutting process, the pressure plate 2023 always maintains downward pressure on the material to be cut, which ensures that the cut film remains neat and flat, guaranteeing a good cutting effect.

[0056] To ensure operator safety, the pressure plate 2023, in conjunction with the clamping device 2022, adjusts the cutting depth of the cutting blade 2026. In the non-working state, the blade of the cutting blade 2026 is concealed within the cutting hole 2028 of the pressure plate 2023. During cutting, the two upward-curving sides of the pressure plate 2023 connect to the clamping device, causing the pressure plate 2023 to be compressed and moved upwards, thus exposing the cutting blade 2026 through the cutting hole 2028 for easier cutting. Specifically, in the non-working state, the lowest point of the cutting blade 2026 is retracted into the cutting hole 2028 by 2.5 ± 0.5 mm. During cutting, the pressure plate 2023 is compressed and moved upwards by ≥ 3 mm, exposing the cutting blade 2026.

[0057] like Figure 10 As shown, the placement rack 401 in this embodiment is used to place the sealed reagent tube assembly 40. It has multiple evenly parallel reagent tube receiving cavities 402 inside, the depth of which is greater than the length of a single reagent tube in the assembly. Furthermore, to prevent damage to the cutting blade 2026, cutting grooves 403 capable of accommodating the cutting blade edge are evenly provided on both sides of each reagent tube receiving cavity.

[0058] In order to achieve bidirectional cutting, the exposed part of the cutting blade 2026 in this embodiment is a tapering structure from top to bottom, which is not limited to arc, circle, arch, crescent, ring, etc. The motor 101 is a bidirectional motor that can control the forward and reverse transmission of the lead screw 102.

[0059] To accommodate the cutting requirements of different specifications of reagent tube films, the mounting hole 2010 is vertically arranged on the fixed bracket 201, that is, pointing towards the base. The mounting hole 2010 of a certain length can be made according to actual needs, thereby adjusting the height of the cutting blade assembly 202. Furthermore, the specifications and size of the placement rack 401 can also be adjusted to meet different needs.

[0060] The working process of this embodiment is as follows:

[0061] First, the reagent tube assembly 40 with the film to be cut is placed into the reagent tube receiving cavity 402 of the placement rack 401. Then, the placement rack 401 is placed on the limiting seat 30. When the placement rack 401 contacts the micro switch 302 on the limiting seat 30, the micro switch 302 transmits the signal that the placement rack 401 is in place to the motor control mechanism. The origin switch 107 identifies the position information of the support platform 104 on the lead screw 102. At this time, the motor 101 is started. The motor 101 drives the lead screw 102 to move the reagent tube assembly 40 gradually to below the cutting blade assembly 202. When the reagent tube assembly 40 contacts the pressure plate 2023, it will apply upward pressure to the pressure plate 2023, causing the pressure plate 2023 to move upward and compress the spring 2024, thereby exposing the blade of the cutting blade 2026. As the reagent tube assembly 40 continues to move, the cutting blade 2026 completes the cutting operation of the film on the surface of the reagent tube assembly 40. When the reagent tube assembly 40 separates from the pressure plate 2023, the spring 2024 returns to its original position, and the pressure plate 2023 moves downward to hide the blade of the cutting blade 2026 inside the blade outlet 2028. When the motor 101 rotates in the reverse direction, the support platform 104 can transport the reagent tube assembly to be cut back to the bottom of the cutting component, completing one cutting operation.

[0062] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", 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 that the utility model product is usually placed in during 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.

[0063] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "located in," and "connected" 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.

Claims

1. A film cutting device for single reagent tubes, characterized in that, The device includes: The driving unit has a reagent tube receiving device slidably connected to it. The driving unit is provided with a slide rail that cooperates with the reagent tube receiving device, and the reagent tube receiving device can reciprocate along the slide rail. The cutting section includes a cutting assembly mounted above the slide rail of the drive section. The cutting assembly has a plurality of cutting blades on the side opposite to the drive section. The plurality of cutting blades are used to cut the film when the reagent tube receiving device moves to below the cutting assembly.

2. The film cutting device for a single reagent tube according to claim 1, characterized in that, The drive unit specifically includes: A lead screw module includes a base, a slide rail laid on the base, a lead screw parallel to the slide rail on the base, a motor connected to the lead screw at one end of the base, a rotatable connection between the other end of the base and the lead screw, and a threaded connection between the lead screw and the reagent tube assembly receiving device.

3. The film cutting device for a single reagent tube according to claim 2, characterized in that, The reagent tube receiving device specifically includes: A support platform, which passes through a lead screw and is threadedly connected to the lead screw; The bottom of the support platform is provided with a slider that fits into the slide rail; The support platform is provided with a limiting platform, which is used to receive the reagent tube assembly.

4. A film cutting device for a single reagent tube according to claim 2, characterized in that, The base is also equipped with an origin switch on the side near the motor. The origin switch is connected to the motor control mechanism. The motor control mechanism receives the reference zero position provided by the origin switch to control the conveying distance of the motor driving the limit stage.

5. A film cutting device for a single reagent tube according to claim 3, characterized in that, The limiting stage includes a base plate disposed on a support platform. The base plate is uniformly provided with a plurality of baffles perpendicular to the base plate around its edge. A micro switch is embedded in the base surface. The baffles and the micro switch cooperate to limit the position of the reagent tube assembly.

6. A film cutting device for a single reagent tube according to claim 5, characterized in that, The reagent tube assembly also includes a placement rack, which is embedded in the substrate through a baffle. The placement rack has multiple uniformly parallel reagent tube receiving cavities inside, and each reagent tube receiving cavity has a cutting groove on both sides that cooperates with the blade of the cutting knife.

7. A film cutting device for a single reagent tube according to claim 2, characterized in that, The cutting component specifically includes: A fixed bracket is provided on both sides of the base, perpendicular and symmetrical to the base, and a cutting blade assembly is mounted on the end of the fixed bracket away from the base; A cutting blade assembly includes a blade holder, which is disposed between two fixed supports on both sides of a base. A plurality of cutting blades are disposed on the side of the blade holder opposite to the base. A clamping device is provided above the blade holder, with both ends of the clamping device extending out from both sides of the blade holder. A pressure plate is provided below the blade holder, with both sides of the pressure plate connected to the ends of the clamping device extending out from both sides of the blade holder via elastic elements. A plurality of blade outlet holes for cooperating with the cutting blades are opened on the side of the pressure plate opposite to the blade holder.

8. A film cutting device for a single reagent tube according to claim 7, characterized in that, When the pressure plate is not subjected to external pressure, the blades of the plurality of cutting blades are located in the blade outlet holes of the pressure plate; after the pressure plate is subjected to external pressure, the blades of the plurality of cutting blades extend out of the blade outlet holes.

9. A film cutting device for a single reagent tube according to claim 8, characterized in that, The pressure plate includes a horizontal plate and a bent plate; The horizontal plate is arranged opposite to the tool holder, and the tool outlet hole is opened on the horizontal plate; The bending plates are located on both sides of the horizontal plate, and the bending plates are connected to the clamping device through elastic elements.

10. A film cutting device for a single reagent tube according to claim 9, characterized in that, The angle between the bent plate and the horizontal plate is 130° to 160°.

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