An endoscopic operation practice teaching device

Abstract

The present invention relates to the technical field of digestive endoscopes, and specifically, to a teaching device for digestive endoscope operation practice. It includes an upper cover, a lower cover and a simulation part. A cover plate is arranged on the top of the upper cover. A rotating mechanism is arranged on one side of the simulation part. A spraying mechanism is arranged on the rotating mechanism. The spraying mechanism is communicated with a scraper on the rotating mechanism end. The rotating mechanism is used to rotate along the gastric contour in the simulation part and apply pressure to the spraying mechanism, so that the disinfectant liquid sprayed from the spraying mechanism disinfects the simulation part. The rotating mechanism drives the scraper to move in the simulation part. The scraper is used to fit the gastric contour in the simulation part, that is, the scraper slides from the narrow end to the wide end of the gastric contour in the simulation part. By gradually adapting to the gastric contour during the sliding process of the scraper, the gastric contour can be effectively covered, and an external force is applied to the ejector rod by a counterweight. The ejector rod applies a thrust to the baffle, so that the baffle applies pressure to the scraper, ensuring the tightness of the fit between the scraper and the gastric contour, which helps to improve the cleaning effect.

Description

Technical Field

[0001] The present invention relates to the technical field of digestive endoscopy, and more specifically, to a teaching device for digestive endoscopy operation practice. Background Art

[0002] Digestive endoscopy technology plays a crucial role in the diagnosis and treatment of digestive system diseases. With the continuous development of medical technology, the skill requirements for digestive endoscopy operators are increasing day by day. The traditional digestive endoscopy teaching mode mainly relies on theoretical lectures and watching surgical videos. Students lack the opportunity to practice hands-on, and it is difficult to practice in the real human anatomical structure and physiological environment, which leads to problems such as students being unskilled in operation and inaccurate in identifying lesions during their first clinical practice, increasing the pain of patients and medical risks.

[0003] Currently, Chinese Patent Publication No.: CN119626080A proposes a simulation device for digestive endoscopy, including a base, and four sets of support legs for supporting the device are fixedly connected to the bottom of the base; it further includes: a first simulation chamber, a gastric simulation area for digestive endoscopy practice is opened in the middle position at the top of the first simulation chamber, a first empty slot for installing a cleaning device is opened on one side of the gastric simulation area at the top of the first simulation chamber, and a second empty slot is opened on the other side of the gastric simulation area at the top of the first simulation chamber. By mutually adjusting and controlling the contact positions of the first scraper and the second scraper with the gastric simulation area through the second hydraulic cylinder and the third hydraulic cylinder, the inside of the gastric simulation area can be cleaned and scraped.

[0004] Although the existing simulation device is convenient to use, there are still some problems. For example: the existing simulation device is used frequently in students' practice, which will cause bacteria and stains to be generated in the inner cavity of the simulation device. However, the simulation device is made by imitating the internal structure of the human body and has certain requirements for internal sealing in order to better simulate the internal organs of the human body. This leads to the simulation device not being easy to open, and it is more difficult to clean the inside. Completely opening the simulation device for manual treatment also allows a large number of bacteria from the outside to enter the inside of the simulation device, instead increasing the cleaning difficulty;

[0005] Although in the above document, the contact positions of the first scraper and the second scraper with the gastric simulation area can be mutually adjusted and controlled through the second hydraulic cylinder and the third hydraulic cylinder to clean and scrape the inside of the gastric simulation area, however, the inside of the simulation device imitates human organs and is in an uneven state, and there is a gap between the first scraper and the second scraper. When moving horizontally or vertically, due to being unable to adapt to the gastric simulation area, there are phenomena of cleaning dead corners and omissions. Summary of the Invention

[0006] The present invention provides a teaching device for digestive endoscopy operation practice. During the sliding process of the scraping plate, it gradually adapts to the gastric contour, can effectively cover the gastric contour, and uses a counterweight to apply an external force to the ejector rod. The ejector rod exerts a thrust on the baffle, causing the baffle to press on the scraping plate to ensure the tight fit between the scraping plate and the gastric contour, thereby solving the problems raised in the above-mentioned background technology, that is:

[0007] There is a gap between the first scraping plate and the second scraping plate. During horizontal or vertical movement, due to the inability to adapt to the gastric simulation area, there are phenomena of cleaning dead corners and omissions.

[0008] To achieve the above object, the teaching device for digestive endoscopy operation practice includes an upper cover, a lower cover and a simulation part. A cover plate is provided on the top of the upper cover. A rotating mechanism is provided on one side of the simulation part. A spraying mechanism is provided on the rotating mechanism. The spraying mechanism is communicated with a scraping plate at the end of the rotating mechanism. The rotating mechanism is used to rotate along the gastric contour in the simulation part and apply pressure to the spraying mechanism, so that the disinfectant liquid sprayed in the spraying mechanism disinfects the simulation part. The rotating mechanism drives the scraping plate to move in the simulation part. The scraping plate is used to fit the gastric contour in the simulation part, so that the scraping plate slides from the narrow end to the wide end of the gastric contour of the simulation part to scrape the disinfectant liquid to the end of the simulation part.

[0009] The scraping plate is arc-shaped and coincides with the gastric contour of the simulation part.

[0010] In the above technical solution, during the sliding process of the scraping plate, it gradually adapts to the gastric contour, can effectively cover the gastric contour, improve the cleaning effect, and reduce the number of times of manually opening the device by realizing the cleaning inside the simulation part.

[0011] Secondly, during the process of realizing the spraying of the disinfectant liquid, the spraying mechanism includes a box body provided at the fixed end of the telescopic plate, and a spraying ring adhesively provided on the scraping plate. A liquid supply pipe is communicated between the spraying ring and the box body. A plurality of nozzles are arranged at intervals on the spraying ring. An air delivery pipe is communicated between the box body and the piston cylinder.

[0012] In the above technical solution, an air inlet pipe is provided on the side opposite to the connection between the air delivery pipe and the piston cylinder. The air inlet pipe is communicated with the piston cylinder. One-way valves are arranged in both the air inlet pipe and the air delivery pipe. During use, the one-way valve in the air inlet pipe allows external air to enter the piston cylinder, and the one-way valve in the air delivery pipe is used to deliver the air inside the piston cylinder to the box body to apply pressure to the disinfectant liquid in the box body.

[0013] Compared with the prior art, the beneficial effects of the present invention:

[0014] 1. During the sliding process of the scraper, it gradually adapts to the gastric contour, effectively covering the gastric contour. The counterweight applies an external force to the ejector rod, and the ejector rod exerts a thrust on the baffle, causing the baffle to press on the scraper, ensuring the tight fit between the scraper and the gastric contour and helping to improve the cleaning effect.

[0015] 2. Under the action of the gravity of the counterweight, the ejector rod applies a thrust to the baffle, causing the baffle to slide along the trajectory of the slide rail and gradually release the corresponding valve plate from the drain hole, connecting the liquid accumulation cavity and the drain cavity. The disinfectant sprays out from the nozzle, thereby covering the area where the range of the gastric contour increases, improving the disinfection effect on the gastric contour, and saving the use of disinfectant at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is an exploded structure schematic diagram of the upper cover and the lower cover of the present invention;

[0018] Figure 3 is a top view of the simulation part and the spraying mechanism of the present invention;

[0019] Figure 4 is an exploded structure schematic diagram of the telescopic plate and the scraper of the present invention;

[0020] Figure 5 is a top view of the piston rod sliding along the simulation part of the present invention;

[0021] Figure 6 is the present invention Figure 5 The enlarged structure schematic diagram at A in;

[0022] Figure 7 is a schematic diagram of the scraper change structure of the present invention;

[0023] Figure 8 is an exploded structure schematic diagram of the spraying ring, the scraper, the baffle, and the slide rail of the present invention;

[0024] Figure 9 is a schematic diagram of the connection structure between the spraying ring and the baffle of the present invention;

[0025] Figure 10 is the present invention Figure 9 The enlarged structure schematic diagram at B in;

[0026] Figure 11 is a right view of the sectional structure of the spraying ring of the present invention.

[0027] The meanings of the various reference numerals in the figure are as follows:

[0028] 100. Upper cover; 101. Lower cover; 102. Simulation part;

[0029] 110, Rotating mechanism; 111, Motor; 112, Telescopic plate; 113, Piston cylinder; 114, Piston rod; 115, Check valve;

[0030] 120, Spraying mechanism; 121, Box body; 122, Spraying ring; 123, Gas transmission pipe; 124, Liquid supply pipe;

[0031] 130, Scraper; 131, Vertical plate;

[0032] 140, Counterweight; 141, Push rod; 142, Baffle; 143, Slide rail;

[0033] 150, Partition board; 151, Drain hole; 152, Valve plate; 153, Compression spring. Specific embodiments

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In view of the fact that during the operation practice of a digestive endoscope, the interior of the simulation device imitates human organs and is in an uneven state, and there is a gap between the first scraper and the second scraper. When moving horizontally or vertically, since it cannot be adapted to the gastric simulation area, there are dead corners and omissions in cleaning. The present invention provides a teaching device for digestive endoscope operation practice. Refer to Figures 1-4 As shown, it includes an upper cover 100, a lower cover 101 and a simulation part 102. A cover plate is provided on the top of the upper cover 100. When the upper cover 100 and the lower cover 101 are fitted, there are glove holes on both sides of the upper cover 100 and the lower cover 101 that communicate with the simulation part 102. An operation glove (which belongs to the prior art and is not shown in the figure) is provided on the glove holes so that the arm can be extended into the gastric contour of the simulation part 102 for operation during simulation;

[0036] Secondly, a rotating mechanism 110 is provided on one side of the simulation part 102. A spraying mechanism 120 is provided on the rotating mechanism 110. The spraying mechanism 120 is communicated with a scraper 130 at the end of the rotating mechanism 110. First, during the rotation of the rotating mechanism 110, the rotating mechanism 110 is used to rotate along the gastric contour in the simulation part 102 and apply pressure to the spraying mechanism 120, so that the disinfectant liquid sprayed from the spraying mechanism 120 disinfects the simulation part 102. At the same time, the rotating mechanism 110 drives the scraper 130 to move in the simulation part 102. The scraper 130 is used to fit the gastric contour in the simulation part 102, so that the scraper 130 slides from the narrow end to the wide end of the gastric contour of the simulation part 102, so as to scrape the disinfectant liquid to the end of the simulation part 102, thereby realizing the cleaning problem of the inside of the simulation part 102 and reducing the number of times of manually opening the device.

[0037] The following combines Figure 3 and Figure 4 to show the specific structure of the rotating mechanism 110. Among them, the rotating mechanism 110 includes a motor 111 and a telescopic plate 112. The motor 111 is located on one side of the simulation part 102. The fixed end of the telescopic plate 112 is coaxially connected to the output shaft of the motor 111. A vertical plate 131 is fixedly arranged at the end of the telescopic end. The vertical plate 131 is fixedly arranged with the scraper 130. In this way, after the simulation ends, initially, the scraper 130 is located at the narrow end of the gastric contour of the simulation part 102. The motor 111 drives the fixed end of the telescopic plate 112 to rotate, and the telescopic end and the scraper 130 rotate synchronously with the fixed end. During the rotation, the scraper 130 slides from the narrow end to the wide end to realize the cleaning work of the simulation part 102.

[0038] As above, the scraper 130 is used to clean the inside of the simulation part 102, and the scraper 130 is arc-shaped and coincides with the gastric contour of the simulation part 102. During the cleaning process, the design of the scraper 130 can better adapt to the curve and contour of the stomach, ensure that it can fit the gastric wall during the cleaning process, clean the gastric wall without dead corners, and improve the cleaning effect.

[0039] Furthermore, in order to spray the disinfectant liquid on one side and use the scraper 130 to scrape on the other side for cleaning when the telescopic plate 112 rotates, for this reason, the following is in Figure 4 On the basis of and in combination with Figure 5 As shown, the rotating mechanism 110 further includes a piston cylinder 113 fixedly arranged at the bottom of the fixed end. The piston cylinder 113 is inclined and has an opening at the end. The inclined setting means taking Figure 3 as an example, in the top view direction, an included angle is formed between the piston cylinder 113 in this state and the telescopic plate 112;

[0040] The piston rod 114 is sleeved and fitted inside the piston cylinder 113. The end of the piston rod 114 bends downward to form a bent end, which is placed on the edge of the stomach contour of the simulation part 102 and is arranged in a staggered manner with the scraper 130. The purpose of forming the stagger between the bent end and the scraper 130 is that when the telescopic plate 112 rotates, the scraper 130 rotates synchronously with the piston cylinder 113, and the end of the piston rod 114 slides along the edge. At this time, refer to Figure 7 As shown, initially, the scraper 130 located at the narrow end of the stomach contour is shown by a solid line. The two ends of the scraper 130 extend beyond the stomach contour, and its middle part fits the narrow end of the stomach contour. If the bent end of the piston cylinder 113 is set at the end of the scraper 130, it will hinder the end of the scraper 130. At the same time, the middle part of the scraper 130 fits the stomach contour, causing the part between the end and the middle of the scraper 130 to be separated from the stomach contour, generating a gap, thereby affecting the cleaning effect of the stomach contour.

[0041] In addition, when the scraper 130 travels inside the stomach contour, the spraying mechanism 120 sprays disinfectant into the stomach contour, achieving the purpose of disinfecting and cleaning the stomach contour at the same time. Thus, the structure of the spraying mechanism 120 is shown below. The spraying mechanism 120 includes a box body 121 arranged at the fixed end of the telescopic plate 112, and a spraying ring 122 adhesively arranged on the scraper 130. A liquid supply pipe 124 is connected between the spraying ring 122 and the box body 121. A plurality of nozzles are arranged at intervals on the spraying ring 122. An air supply pipe 123 is connected between the box body 121 and the piston cylinder 113.

[0042] On the other hand, as shown in Figure 6 An air inlet pipe is arranged on the side opposite to the connection between the air supply pipe 123 and the piston cylinder 113. The air inlet pipe is connected to the piston cylinder 113. Check valves 115 are arranged in both the air inlet pipe and the air supply pipe 123. The check valve 115 in the air inlet pipe allows external air to enter the piston cylinder 113, and the check valve 115 in the air supply pipe 123 is used to supply the air inside the piston cylinder 113 to the box body 121 to apply pressure to the disinfectant in the box body 121.

[0043] Working principle: When the bent end of the piston rod 114 gradually slides from the narrow end to the wide end of the stomach contour, in the initial stage (the upper half of the stomach contour trajectory), the bent end slides along the stomach contour, and the piston rod 114 extends out of the piston cylinder 113. During this process, the check valve 115 in the air inlet pipe is in a closed state, so the end of the piston rod 114 presses the air in the piston cylinder 113 into the box body 121 through the air supply pipe 123. At this time, the disinfectant is sprayed out from the nozzles (refer to Figure 11 As shown) to disinfect the stomach contour;

[0044] On the contrary, when the bent end of the piston rod 114 slides to the lower half of the trajectory, that is, the lower half of the trajectory presents Figure 3 the state shown in the figure. The pulled-out piston rod 114 cannot be stretched again. At this time, the pressure exerted by the air accumulated in the upper half of the trajectory on the box body 121 can be used to continue to supply the disinfectant to the nozzle. During this process, the pressure in the box body 121 is gradually weakening. When the pressure disappears, the disinfectant can be scraped to the wide end of the gastric contour by the scraper 130 and discharged from the small holes at the wide end, thereby achieving the cleaning effect inside the gastric contour.

[0045] After the cleaning is completed, the piston rod 114 is manually pushed backward. At this time, the one-way valve 115 in the air delivery pipe 123 is in the closed state, and external air enters the piston cylinder 113.

[0046] Furthermore, in the initial stage, both sides of the scraper 130 exceed the two sides of the gastric contour. If the nozzles of the excess parts also spray the disinfectant, it will cause the disinfectant to splash on the simulation part 102, which not only causes waste but also increases the difficulty of later cleaning. Therefore, as Figure 8 、 Figure 9 and Figure 10 shown in the figure, a baffle 142 is fitted on the spraying ring 122 on the opposite side of the nozzle. The baffle 142 is used to control the opening and closing of the valve assembly inside the spraying ring 122. A partition 150 is fixedly arranged inside the spraying ring 122. The partition 150 divides the inside of the spraying ring 122 into a liquid accumulation cavity and a liquid discharge cavity. The liquid accumulation cavity and the liquid discharge cavity are communicated through a number of liquid discharge holes 151 on the partition 150. The liquid discharge cavity is communicated with the nozzle;

[0047] The valve assembly includes a valve plate 152 for blocking the liquid discharge holes 151. One end of the valve plate 152 penetrates through the spraying ring 122, and a compression spring 153 is elastically connected between the other end and the inner wall of the liquid discharge cavity. A baffle 142 is fitted on the spraying ring 122, and a slide rail 143 is slidably arranged on the outside of the baffle 142. The slide rail 143 is fixedly arranged with the scraper 130;

[0048] Therefore, when the scraper 130 is in the initial stage, both ends of the scraper 130 resting on the gastric contour are upturned. In this state, some of the liquid discharge holes 151 are blocked by the valve plate 152, blocking the communication between the liquid accumulation cavity and the liquid discharge cavity and restricting the spraying of the disinfectant from the nozzle. In addition, the liquid discharge holes 151 in the middle of the spraying ring 122 are always in the conducting state (refer to Figure 11 shown in the figure). Similarly, when the scraper 130 is at the narrow end of the gastric contour, the liquid accumulation cavity and the liquid discharge cavity exceeding the gastric contour are blocked by the valve plate 152, while the liquid accumulation cavity and the liquid discharge cavity within the range of the gastric contour are in the conducting state. In this way, the waste of the disinfectant can be reduced, and the nozzles spraying the disinfectant are adapted to the range of the gastric contour.

[0049] It should be noted that considering that the gastric contour is in an asymmetric state during the movement of the scraper 130, in order to facilitate the gradual adaptation of the scraper 130 to the gastric contour, the spraying ring 122, the scraper 130, the baffle 142, the slide rail 143 and the partition 150 are all made of elastic materials, such as rubber;

[0050] Preferably, the baffle 142 is rotatably arranged at one end of the ejector rod 141, and a counterweight 140 is rotatably arranged at the other end of the ejector rod 141. The counterweight 140 is slidably arranged with the vertical plate 131. For the state of the scraper 130 in the initial stage, please refer to Figure 7 as shown by the solid line part in. In this state, the end of the scraper 130 is upturned and rests on the edge of the gastric contour. Since the frictional force between the baffle 142 and the slide rail 143, the scraper 130 and the spraying ring 122 overcomes the thrust exerted by the counterweight 140 on the ejector rod 141, the baffle 142 remains in its original state;

[0051] As the scraping of the scraper 130 continues, the range of the gastric contour increases, and the scraper 130 expands outward to adapt to the gastric contour. During this process, the state of the scraper 130 is referred to Figure 7 as shown by the dotted line part in. Under the action of the gravity of the counterweight 140, a thrust is applied to the baffle 142 through the ejector rod 141, so that the baffle 142 slides along the track of the slide rail 143, and gradually releases the corresponding valve plate 152 from the drain hole 151, connecting the liquid accumulation cavity and the drain cavity, and the disinfectant is sprayed out from the nozzle, so as to cover the area where the range of the gastric contour increases, improve the disinfection effect on the gastric contour, and save the use of disinfectant at the same time.

[0052] Moreover, by gradually adapting to the gastric contour during the sliding process of the scraper 130, the gastric contour can be effectively covered, and an external force is applied to the ejector rod 141 by the counterweight 140, and the ejector rod 141 applies a thrust to the baffle 142, so that the baffle 142 presses on the scraper 130, ensuring the tight fit between the scraper 130 and the gastric contour, which helps to improve the cleaning effect.

[0053] And, by separating the counterweight 140 on the vertical plate 131, it is made such that Figure 7 when the two side scrapers 130 in are adapted to the gastric contour, they can be matched according to different positions of the gastric contour to form a coverage of the gastric contour.

[0054] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A teaching device for digestive endoscopy operation practice, comprising an upper cover (100), a lower cover (101) and a simulation part (102), wherein a cover plate is arranged on the top of the upper cover (100), and it is characterized in that: On one side of the simulation part (102), a rotating mechanism (110) is provided. A spraying mechanism (120) is provided on the rotating mechanism (110). The spraying mechanism (120) is communicated with a scraper (130) at the end of the rotating mechanism (110). The rotating mechanism (110) is used to rotate along the gastric contour in the simulation part (102) and apply pressure to the spraying mechanism (120), so that the disinfectant sprayed from the spraying mechanism (120) disinfects the simulation part (102). The rotating mechanism (110) drives the scraper (130) to move in the simulation part (102). The scraper (130) is used to fit the gastric contour in the simulation part (102), so that the scraper (130) slides from the narrow end to the wide end of the gastric contour of the simulation part (102), so as to scrape the disinfectant to the end of the simulation part (102). The rotating mechanism (110) includes a motor (111) and a telescopic plate (112). The motor (111) is located on one side of the simulation part (102). The fixed end of the telescopic plate (112) is coaxially connected to the output shaft of the motor (111), and a vertical plate (131) is fixedly arranged at the telescopic end. The spraying mechanism (120) includes a box body (121) arranged at the fixed end of the telescopic plate (112), and a spraying ring (122) adhesively arranged on the scraper (130). A liquid supply pipe (124) is communicated between the spraying ring (122) and the box body (121). A plurality of nozzles are arranged at intervals on the spraying ring (122). An air delivery pipe (123) is communicated between the box body (121) and the piston cylinder (113). A baffle (142) is adhesively arranged on the spraying ring (122) on the opposite side of the nozzle. The baffle (142) is used to control the opening and closing of a valve assembly inside the spraying ring (122). A partition plate (150) is fixedly arranged inside the spraying ring (122). The partition plate (150) divides the inside of the spraying ring (122) into a liquid accumulation cavity and a liquid discharge cavity. The liquid accumulation cavity and the liquid discharge cavity are communicated through a plurality of liquid discharge holes (151) on the partition plate (150), and the liquid discharge cavity is communicated with the nozzle. The valve assembly includes a valve plate (152) for blocking the liquid discharge holes (151). One end of the valve plate (152) penetrates through the spraying ring (122), and a compression spring (153) is elastically connected between the other end and the inner wall of the liquid discharge cavity. A baffle (142) is adhesively arranged on the spraying ring (122). A slide rail (143) is slidably arranged on the outer side of the baffle (142), and the slide rail (143) is fixedly arranged with the scraper (130). The baffle (142) is rotatably arranged at one end of a push rod (141). A counterweight block (140) is rotatably arranged at the other end of the push rod (141). The counterweight block (140) is slidably arranged with the vertical plate (131), and the counterweight blocks (140) on the vertical plate (131) are arranged separately.

2. The digestive endoscope operation practice teaching device according to claim 1, characterized in that: The vertical plate (131) is fixedly arranged with the scraper (130). The scraper (130) is arc-shaped and coincides with the gastric contour of the simulation part (102).

3. The digestive endoscope operation practice teaching device according to claim 1, characterized in that: The rotating mechanism (110) further includes a piston cylinder (113) fixedly arranged at the bottom of the fixed end. The piston cylinder (113) is inclined and has an opening at its end. A piston rod (114) is sleeved and fitted inside the piston cylinder (113). The end of the piston rod (114) is bent downward to form a bent end, and the bent end is placed on the edge of the gastric contour of the simulation part (102) and is arranged in a staggered manner with the scraper (130). The end of the piston rod (114) slides along the edge.

4. The digestive endoscopy operation practice teaching device according to claim 3, characterized in that: An air inlet pipe is arranged on the side opposite to the connection between the air delivery pipe (123) and the piston cylinder (113). The air inlet pipe is communicated with the piston cylinder (113). Check valves (115) are arranged in both the air inlet pipe and the air delivery pipe (123). The check valve (115) in the air inlet pipe allows external air to enter the piston cylinder (113), and the check valve (115) in the air delivery pipe (123) is used to deliver the air inside the piston cylinder (113) into the box body (121) to apply pressure to the disinfectant solution in the box body (121).

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