A disposable biosafety cabinet operation auxiliary isolation membrane

Abstract

The utility model discloses a disposable biological safety cabinet operation auxiliary isolation film, including support frame, bearing roller, isolation film and force storage unwinding mechanism, support frame is provided with two, and bearing roller rotation is connected between two adjacent support frames. In the utility model, through setting isolation film as three layer structure, make isolation film not only have "transparent, prevent alcohol, degradable" characteristics, still through the electrostatic adsorption ability of bottom layer electrostatic layer fixed, need not sticky glue, not only avoided sticky glue failure problem, also will not leave residual in biological safety cabinet inner surface, through the pertinence design, solved the dental oral cavity isolation film "size is not suitable, easy to break, fixed unstable, clean complicated problem in biological safety cabinet scene, more meet the laboratory high safety, high efficiency operation demand, in addition, the volute spring in force storage unwinding mechanism drives the bearing roller fast rotation through the force storage, realizes the quick unwinding of isolation film.

Description

Technical Field

[0001] This utility model relates to an isolation membrane, specifically a disposable biosafety cabinet operation auxiliary isolation membrane, belonging to the field of isolation membrane technology. Background Technology

[0002] Ensuring a sterile and safe experimental environment is crucial during biosafety cabinet operations. For example, in a biosafety cabinet disclosed in publication number CN108579825A, although the sample environment is guaranteed to be sterile through filtration by a first filter and a high-efficiency filter, followed by sterilization by ultraviolet lamps, and is easy to operate and clean, with a high safety factor, avoiding harm to the external environment and human body, there are still many problems with the existing protective measures for operation inside the biosafety cabinet in this technical solution and most current biosafety cabinets. Currently, similar products on the market are mainly dental oral isolation films, which are mainly used in dental clinics to isolate patient body fluids from medical equipment, such as dental chairs, dental chair operating keyboards, dental lamp covers, dental handpieces, door handles, and other places touched by hands, to isolate germs and prevent cross-infection. However, dental oral isolation films were not originally designed for the operation scenario inside biosafety cabinets, and obvious shortcomings are exposed when used in biosafety cabinets.

[0003] For example, dental isolation membranes are usually designed to fit dental chairs, instrument trays and other dental equipment of a specific size. They are difficult to match with the complex and diverse operating tables, supports and other structures inside biosafety cabinets. The operating space and equipment layout inside biosafety cabinets vary. Standard-sized dental isolation membranes cannot completely cover the operating area, which can easily lead to protective gaps. This results in some areas inside the biosafety cabinet not being effectively protected, increasing the risk of biohazardous substances contaminating the operating area during experiments.

[0004] Meanwhile, oral isolation membranes are mostly fixed with self-adhesive or flexible edges. When self-adhesive isolation membranes are used in biosafety cabinets, adhesive residue will contaminate the inner surface of the biosafety cabinet. Biosafety cabinets have extremely high requirements for internal cleanliness. Adhesive residue not only increases the difficulty of cleaning and consumes a lot of manpower and time, but may also affect the airflow stability of the biosafety cabinet.

[0005] Furthermore, oral isolation membranes are mostly made of ordinary plastic film or non-woven fabric. These materials have poor tear resistance. During operations inside a biosafety cabinet, laboratory personnel frequently come into contact with the isolation membrane. Ordinary isolation membranes are easily torn by sharp laboratory instruments. Once damaged, biohazardous substances will directly come into contact with the operator or contaminate the operating area, rendering the protection ineffective. Utility Model Content

[0006] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings of existing technologies by proposing a disposable biosafety cabinet operation auxiliary isolation membrane.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A disposable biosafety cabinet operation auxiliary isolation membrane includes a support frame, a support roller, an isolation film, and a power storage unwinding mechanism. Two support frames are symmetrically arranged. The support roller is rotatably connected between two adjacent support frames. The isolation film is wound on the support roller. The power storage unwinding mechanism is located on one side of the support frame.

[0009] The isolation film is composed of a sterilization layer, a PE base layer and an electrostatic layer. The PE base layer is disposed between the sterilization layer and the electrostatic layer. The electrostatic layer is attached to the surface of the biosafety cabinet by electrostatic adsorption. The sterilization layer is located on the outside of the isolation film.

[0010] The power storage unwinding mechanism includes a passive ratchet disc, a power storage rod, and a coil spring. The passive ratchet disc is coaxially fixed to one end of the support roller. The power storage rod is rotatably connected to one side of the support frame and is located on the same axis as the passive ratchet disc, with a gap between them. One end of the coil spring is fixed to the passive ratchet disc, and the other end is fixed to the power storage rod.

[0011] As a further improvement of this utility model: the isolation film is provided with perforated dotted lines along the width direction, and multiple perforated dotted lines are provided at equal intervals in the opposite direction along the length of the isolation film.

[0012] As a further embodiment of this utility model: the power storage unwinding mechanism further includes an active ratchet disc, a first transmission rod, and a first pawl. The active ratchet disc is coaxially fixed on the active ratchet disc, the first transmission rod is rotatably connected to the support frame, one end of the first pawl is fixed on the first transmission rod, and the other end slides against the edge of the active ratchet disc.

[0013] As a further embodiment of this utility model: the power storage unwinding mechanism further includes a second transmission rod and a second pawl. The second transmission rod is rotatably connected to one side of the support frame. One end of the second pawl is fixed on the second transmission rod, and the other end slides against the edge of the passive ratchet disc. The first pawl and the second pawl are arranged opposite to each other.

[0014] As a further improvement of this utility model: torsion springs are sleeved on the outside of both the first transmission rod and the second transmission rod. One end of the torsion spring is fixed to the support frame, and the other end abuts against the first pawl and the second pawl, respectively.

[0015] As a further improvement of this utility model, a T-shaped pressing plate is provided at the other end of the second pawl.

[0016] The beneficial effects of this utility model are:

[0017] In this invention, the isolation film is designed with a three-layer structure, which not only makes it transparent, alcohol-resistant, and biodegradable, but also secures it through the electrostatic adsorption of the bottom electrostatic layer, eliminating the need for adhesives. This avoids adhesive failure and leaves no residue on the inner surface of the biosafety cabinet. Through this targeted design, the problems of dental isolation films in biosafety cabinet scenarios, such as "unsuitable size, easy breakage, unstable fixation, and cumbersome cleaning," are comprehensively solved, making it more in line with the high-safety and high-efficiency operation requirements of laboratories. In addition, the coil spring in the power-accumulating unwinding mechanism drives the support roller to rotate rapidly through power accumulation, enabling rapid unwinding of the isolation film and improving operational efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the isolation film structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the support frame and its connection structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the energy storage unwinding mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the energy storage rotating rod and its connection structure of this utility model.

[0023] In the diagram: 1. Support frame, 2. Support roller, 3. Isolation film, 31. Sterilization layer, 32. PE base layer, 33. Electrostatic layer, 4. Power storage unwinding mechanism, 41. Passive ratchet disc, 42. Power storage rotating rod, 43. Coil spring, 44. Active ratchet disc, 45. First transmission rod, 46. First pawl, 47. Second transmission rod, 48. Second pawl. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figures 1 to 5 As shown, a disposable biosafety cabinet operation auxiliary isolation membrane includes a support frame 1, a support roller 2, an isolation film 3, and a power storage unwinding mechanism 4. Two support frames 1 are symmetrically arranged. The support roller 2 is rotatably connected between two adjacent support frames 1. The isolation film 3 is wound on the support roller 2. The power storage unwinding mechanism 4 is arranged on one side of the support frame 1.

[0027] The isolation film 3 is composed of a sterilization layer 31, a PE base layer 32 and an electrostatic layer 33. The PE base layer 32 is disposed between the sterilization layer 31 and the electrostatic layer 33. The electrostatic layer 33 is attached to the surface of the biosafety cabinet by electrostatic adsorption. The sterilization layer 31 is located on the outside of the isolation film 3.

[0028] The power storage unwinding mechanism 4 includes a passive ratchet disc 41, a power storage rod 42, and a coil spring 43. The passive ratchet disc 41 is coaxially fixed to one end of the support roller 2. The power storage rod 42 is rotatably connected to one side of the support frame 1 and is located on the same axis as the passive ratchet disc 41, with a gap between them. One end of the coil spring 43 is fixed to the passive ratchet disc 41, and the other end is fixed to the power storage rod 42.

[0029] The power storage unwinding mechanism 4 also includes an active ratchet disc 44, a first transmission rod 45, and a first pawl 46. The active ratchet disc 44 is coaxially fixed on the active ratchet disc 44. The first transmission rod 45 is rotatably connected to the support frame 1. One end of the first pawl 46 is fixed on the first transmission rod 45, and the other end slides against the edge of the active ratchet disc 44.

[0030] The power storage unwinding mechanism 4 also includes a second transmission rod 47 and a second pawl 48. The second transmission rod 47 is rotatably connected to one side of the support frame 1. One end of the second pawl 48 is fixed on the second transmission rod 47, and the other end slides against the edge of the passive ratchet disc 41. The first pawl 46 and the second pawl 48 are arranged opposite to each other.

[0031] In this invention, the isolation film 3 is designed as a three-layer structure, which not only makes the isolation film 3 transparent, alcohol-resistant, and biodegradable, but also fixes it through the electrostatic adsorption capacity of the bottom electrostatic layer 33, eliminating the need for adhesive. This avoids the problem of adhesive failure and leaves no residue on the inner surface of the biosafety cabinet. Through targeted design, the problems of dental isolation films in biosafety cabinet scenarios, such as "unsuitable size, easy breakage, unstable fixation, and cumbersome cleaning", are comprehensively solved, which better meets the high safety and high efficiency operation requirements of the laboratory. In addition, the coil spring 43 in the power storage unwinding mechanism 4 drives the support roller 2 to rotate quickly through power storage, realizing the rapid unwinding of the isolation film 3 and improving the operation efficiency.

[0032] Example 2

[0033] like Figures 1 to 5As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0034] The isolation film 3 has perforated dotted lines along its width, and multiple perforated dotted lines are equidistantly arranged in the opposite direction along the length of the isolation film 3. By setting the perforated dotted lines, the isolation film 3 can be neatly torn apart, avoiding the need for cutting it with a knife.

[0035] Both the first transmission rod 45 and the second transmission rod 47 are fitted with torsion springs. One end of the torsion spring is fixed to the support frame 1, and the other end abuts against the first pawl 46 and the second pawl 48 respectively. The torsion springs enable the pawls to abut firmly against the ratchet.

[0036] The other end of the second pawl 48 is provided with a T-shaped pressing plate. The T-shaped pressing plate allows the operator to adjust the angle of the second pawl 48, thereby enabling precise control of the unwinding of the support roller 2.

[0037] Working principle: When using this isolation film, first lay one end of the isolation film 3 on the part of the safety cabinet that needs protection. Then, rotate the power storage rod 42 to drive the coil spring 43 to wind up. At this time, the first pawl 46 and the second pawl 48 limit the passive ratchet disc 41 and the active ratchet disc 44 respectively. Then, by adjusting the angle of the second pawl 48, one end of the second pawl 48 is separated from the passive ratchet disc 41. At this time, under the elastic force of the coil spring 43, the passive ratchet disc 41 drives the support roller 2 to rotate, thereby driving the isolation film 3 to unwind, so that the isolation film 3 can be laid on the safety cabinet.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A disposable biosafety cabinet operation auxiliary isolation film, comprising a supporting frame (1), a supporting roller (2), an isolation film (3) and a force storage and unwinding mechanism (4), characterized in that, Two support frames (1) are symmetrically arranged. The support roller (2) is rotatably connected between two adjacent support frames (1). The isolation film (3) is wound on the support roller (2). The energy storage unwinding mechanism (4) is arranged on one side of the support frame (1). The isolation film (3) is composed of a sterilization layer (31), a PE base layer (32) and an electrostatic layer (33). The PE base layer (32) is disposed between the sterilization layer (31) and the electrostatic layer (33). The electrostatic layer (33) is attached to the surface of the biosafety cabinet by electrostatic adsorption. The sterilization layer (31) is located outside the isolation film (3). The energy storage unwinding mechanism (4) includes a passive ratchet disc (41), an energy storage rod (42), and a coil spring (43). The passive ratchet disc (41) is coaxially fixed to one end of the support roller (2). The energy storage rod (42) is rotatably connected to one side of the support frame (1) and is located on the same axis as the passive ratchet disc (41), with a gap between them. One end of the coil spring (43) is fixed to the passive ratchet disc (41), and the other end is fixed to the energy storage rod (42).

2. The disposable biological safety cabinet operation auxiliary isolation film according to claim 1, characterized in that: The isolation film (3) is provided with perforated dotted lines along its width direction, and multiple perforated dotted lines are provided at equal intervals in the opposite direction along the length of the isolation film (3).

3. The disposable biological safety cabinet operation auxiliary isolation membrane according to claim 1, characterized in that: The power storage unwinding mechanism (4) further includes an active ratchet disc (44), a first transmission rod (45), and a first pawl (46). The active ratchet disc (44) is coaxially fixed on the active ratchet disc (44). The first transmission rod (45) is rotatably connected to the support frame (1). One end of the first pawl (46) is fixed on the first transmission rod (45), and the other end slides against the edge of the active ratchet disc (44).

4. The disposable biological safety cabinet operation auxiliary isolation membrane according to claim 3, characterized in that: The power storage unwinding mechanism (4) further includes a second transmission rod (47) and a second pawl (48). The second transmission rod (47) is rotatably connected to one side of the support frame (1). One end of the second pawl (48) is fixed on the second transmission rod (47), and the other end slides against the edge of the passive ratchet disc (41). The first pawl (46) and the second pawl (48) are arranged opposite to each other.

5. The auxiliary isolation membrane for a biological safety cabinet according to claim 4, wherein: The first transmission rod (45) and the second transmission rod (47) are both fitted with torsion springs. One end of the torsion spring is fixed to the support frame (1), and the other end abuts against the first pawl (46) and the second pawl (48) respectively.

6. The auxiliary isolation membrane for a biological safety cabinet according to claim 4, wherein: The other end of the second pawl (48) is provided with a T-shaped pressing plate.

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