Medical garbage can with jet disinfectant function

Abstract

The application discloses a medical garbage can with a disinfectant spraying function, and relates to the medical garbage can field. The medical garbage can with the disinfectant spraying function can automatically spray disinfectant to disinfect garbage after the garbage is put in. The medical garbage can comprises a garbage can body, a garbage can shell, a garbage can cover and a cover driving structure. The garbage can body is placed in the garbage can shell, and the garbage can cover is placed on the garbage can shell. The cover driving structure comprises a foot pedal and a top rod. The foot pedal can drive the top rod to lift the garbage can cover. The medical garbage can further comprises a disinfectant bottle, a spraying structure, a spraying driving structure, a piston rod driving structure, a piston rod positioner, a sprayer and a disinfectant pipeline. The top rod can move linearly in the up-down direction. The sprayer is connected with the garbage can cover. The spraying structure, the spraying driving structure, the piston rod driving structure and the piston rod positioner can be linked with the top rod to automatically spray disinfectant when the garbage can cover is on or close to the cover, so that the put-in garbage can be disinfected.

Description

Technical Field

[0001] This invention relates to the field of medical waste bins, specifically a medical waste bin with a disinfectant spraying function. Background Technology

[0002] Many medical wastes carry germs. When disposing of them in the trash can, it is best to spray them with disinfectant to prevent subsequent bacterial growth and environmental contamination. For example, in the treatment of norovirus diarrhea and Clostridium difficile diarrhea, it is explicitly required that items used by patients, such as diapers, be sprayed with a certain concentration of chlorine-containing disinfectant when disposed of.

[0003] Common medical waste bins do not have a disinfectant spray function. While one could carry a disinfectant sprayer to apply it after disposing of the medical waste, this method is not very convenient. It would be much more convenient if the medical waste bin had an automatic disinfectant spray function after the waste was disposed of.

[0004] A search revealed several patents disclosing medical waste bins with disinfectant spraying capabilities. Chinese patent application number 201810801959.3 discloses an environmentally friendly waste bin for hospitals with a disinfection function. This waste bin is equipped with a disinfectant reservoir, and the disinfectant can be sprayed out by manual pressing to disinfect the waste; however, the level of automation is still not high.

[0005] Chinese patent application number 202020793952.4 discloses a self-disinfecting trash can, including a can body, a lid, and a disinfection device. The lid is rotatably connected to one side of the can body, allowing it to open and close around this connection. The disinfection device is a press-and-suction type, including a spray nozzle and a pressing plate. The pressing plate is rotatably connected to both the can body and the lid. When the lid is opened, the pressing plate causes the spray nozzle of the disinfection device to spray disinfectant into the can body. This patent allows disinfectant to be sprayed out simultaneously with the lid opening, reducing the risk of infection to people. While this trash can automatically sprays disinfectant when the lid is open, the timing of the spray is questionable. Disinfectants require a certain amount of time to act; spraying disinfectant when the lid is open does not immediately kill germs, thus the risk of germ spillage remains high. Furthermore, newly added trash is not disinfected, allowing germs to proliferate inside the can. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a medical waste bin with a disinfectant spraying function that can automatically spray disinfectant after the waste is put in.

[0007] The technical solution adopted to solve the above problems is as follows: A medical waste bin with a disinfectant spraying function includes a waste bin body, a waste bin shell, a waste bin lid, and a lid driving structure. The waste bin body is placed inside the waste bin shell, and the waste bin lid covers the waste bin shell. The lid driving structure includes a foot pedal and a push rod. The foot pedal can drive the push rod to lift the waste bin lid. It also includes a disinfectant bottle, a spraying structure, a spraying driving structure, a piston rod driving structure, a piston rod positioner, a sprayer, and a disinfectant pipeline. The push rod can move linearly up and down. The sprayer is connected to the waste bin lid.

[0008] The disinfectant bottle is connected to the garbage can shell; the spray structure is arranged in the vertical direction, and the spray structure includes a spray tube, a piston and a piston rod. The piston is located inside the spray tube and cooperates with the spray tube. The piston rod is connected to the piston. The piston rod has a first flange, a second flange and a third flange arranged sequentially from bottom to top.

[0009] The disinfectant pipeline includes an intake pipe and an exhaust pipe, both of which are connected to the spray nozzle. The intake pipe is inserted into the disinfectant bottle, and the exhaust pipe is connected to the sprayer. The intake pipe is equipped with an intake check valve that can open in one direction towards the spray nozzle, and the exhaust pipe is equipped with an exhaust check valve that can open in one direction towards the sprayer.

[0010] The injection drive structure includes a spring top plate and an injection spring. The spring top plate is located between the first flange and the second flange. The injection spring is sleeved on the piston rod, and the upper and lower ends of the injection spring abut against the spring top plate and the first flange, respectively.

[0011] The piston rod drive structure includes a drive sleeve and an unlocking rod. The drive sleeve is fitted on the piston rod and located between the second flange and the third flange. The drive sleeve is connected to the push rod, and the unlocking rod is connected to the drive sleeve.

[0012] The piston rod positioner is connected to the trash can housing and located between the second flange and the third flange. The piston rod positioner includes a locking tongue that extends under the action of a positioner spring.

[0013] When the push rod moves upward, the drive sleeve drives the piston rod to move upward. As the piston moves upward, the spray nozzle draws in disinfectant. The second flange moves above the locking tongue, which restricts the piston rod from moving downward. When the push rod moves downward, and the trash can lid is closed or close to being closed, the unlocking rod drives the locking tongue to retract. The spray spring drives the piston rod to move downward, and the piston moves downward to press out disinfectant.

[0014] Furthermore, the piston rod includes an upper section and a lower section. The lower section has an insertion hole, and the upper section is inserted into and mates with the insertion hole, which is sealed with air. The first flange, the second flange, and the third flange are all located on the upper section of the piston rod. A piston limiting sleeve is provided at the upper end of the injection cylinder.

[0015] Furthermore, the piston rod positioner includes a positioner housing and a control plate. The positioner housing has a latch hole and a side wall elongated hole. The latch is inserted into the latch hole, and the end face of the latch is a latch bevel. The control plate passes through the side wall elongated hole and is connected to the latch. The control plate has a control plate bevel. The unlocking rod moves down and pushes the control plate bevel to retract the control plate, causing the latch to retract. The second flange moves up and pushes the latch bevel to retract the latch.

[0016] Furthermore, the trash can shell has a hole for mounting a disinfectant bottle, and the disinfectant bottle is threaded into the hole.

[0017] Furthermore, the ejector is disc-shaped, and its lower surface has multiple ejection holes.

[0018] Furthermore, the sprayer is detachably connected to the trash can lid.

[0019] Furthermore, the lid drive structure includes a guide sleeve that fits onto the top rod and connects to the garbage can shell; a vertical rod is provided on the garbage can lid, and an upper hinge shaft is provided on the vertical rod; the middle part of the foot pedal is hinged to the garbage can shell, one end of the foot pedal protrudes from the garbage can shell, and the other end has a foot pedal elongated hole along the length of the foot pedal; the upper end of the top rod has a top rod elongated hole in a horizontal direction, and the lower end of the top rod is provided with a lower hinge shaft; the upper hinge shaft is inserted into the top rod elongated hole, and the lower hinge shaft is inserted into the foot pedal elongated hole.

[0020] Furthermore, the lid drive structure includes a lower push spring, which is mounted on the push rod and pushes the push rod downward.

[0021] The beneficial effects of this invention are as follows: Like a conventional trash can, the lid opens when the foot pedal is pressed, allowing trash to be disposed of; releasing the foot pedal automatically closes the lid. The difference lies in the inclusion of a linkage mechanism that automatically sprays disinfectant when the lid is closed or nearing closure, disinfecting the disposed trash and preventing the growth and spillage of germs carried by the trash.

[0022] When using this invention, like a conventional trash can, simply stepping on and releasing the foot pedal will spray disinfectant, requiring no additional operation. It boasts a high degree of automation and ease of use. The disinfectant spraying time is precise. Furthermore, this invention achieves automatic disinfectant spraying without using electrical components, is not limited by the usage environment (whether there is a power cord or plug), requires no charging, and can be moved to any location for use. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a medical waste bin with a disinfectant spraying function;

[0024] Figure 2 This is an enlarged view of the structure related to disinfectant spraying;

[0025] Figure 3 This is an enlarged view of the lower end of the piston rod;

[0026] Figure 4 This is a structural diagram of the piston rod positioner;

[0027] Figure 5 This is a structural diagram of the upper end of the push rod;

[0028] Figure 6 This is a structural diagram of the lower end of the push rod;

[0029] Figure 7 This is a schematic diagram of step one of the uses of the present invention;

[0030] Figure 8 This is a schematic diagram illustrating step two of the present invention;

[0031] The diagram is labeled as follows: 1. Trash can shell; 1-1. Disinfectant bottle mounting hole; 2. Trash can body; 3. Trash can lid; 3. Vertical rod; 3-1. Upper hinge shaft; 3-2. Lid drive structure; 4. Foot pedal; 4-1. Foot pedal elongated hole; 4-1-1. Top rod; 4-2. Top rod elongated hole; 4-2-1. Lower hinge shaft; 4-2-2. Guide sleeve; 4-3. Lower top spring; 4-4. Disinfectant bottle; 5. Disinfectant pipeline; 6. Suction pipe; 6-1. Discharge pipe; 6-2. Suction check valve; 6-3. Discharge check valve; 6-4. Spray structure; 7. Spray cylinder; 7-1. Piston limit sleeve; 7-1-1. Piston; 7-2. Piston rod; 7. -3, First flange 7-3-1, Second flange 7-3-2, Third flange 7-3-3, Upper section of piston rod 7-3-4, Lower section of piston rod 7-3-5, Insertion hole 7-3-6, Injection drive structure 8, Spring top plate 8-1, Injection spring 8-2, Piston rod positioner 9, Locking tongue 9-1, Locking tongue inclined surface 9-1-1, Positioner spring 9-2, Positioner housing 9-3, Locking tongue hole 9-3-1, Side wall elongated hole 9-3-2, Control plate 9-4, Control plate inclined surface 9-4-1, Piston rod drive structure 10, Drive sleeve 10-1, Unlocking rod 10-2, Injector 11. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1 to 4As shown, a medical waste bin with a disinfectant spraying function includes a waste bin body 2, a waste bin shell 1, a waste bin lid 3, and a lid driving structure 4. The waste bin body 2 is placed inside the waste bin shell 1, and the waste bin lid 3 covers the waste bin shell 1. The lid driving structure 4 includes a foot pedal 4-1 and a push rod 4-2. The foot pedal 4-1 can drive the push rod 4-2 to lift the waste bin lid 3. It also includes a disinfectant bottle 5, a spraying structure 7, a spraying driving structure 8, a piston rod driving structure 10, a piston rod positioner 9, a sprayer 11, and a disinfectant pipeline 6. The push rod 4-2 can move linearly up and down. The sprayer 11 is connected to the waste bin lid 3.

[0034] Disinfectant bottle 5 is connected to trash can shell 1; spray structure 7 is arranged vertically, spray structure 7 includes spray cylinder 7-1, piston 7-2 and piston rod 7-3, piston 7-2 is located inside spray cylinder 7-1 and cooperates with spray cylinder 7-1, piston rod 7-3 is connected to piston 7-2, piston rod 7-3 has a first flange 7-3-1, a second flange 7-3-2 and a third flange 7-3-3 arranged sequentially from bottom to top;

[0035] The disinfectant pipeline 6 includes an inhalation pipe 6-1 and an outlet pipe 6-2. Both the inhalation pipe 6-1 and the outlet pipe 6-2 are connected to the spray cylinder 7-1. The inhalation pipe 6-1 is inserted into the disinfectant bottle 5, and the outlet pipe 6-2 is connected to the sprayer 11. The inhalation pipe 6-1 is equipped with an inhalation check valve 6-3 that can open in one direction towards the spray cylinder 7-1, and the outlet pipe 6-2 is equipped with an outlet check valve 6-4 that can open in one direction towards the sprayer 11.

[0036] The injection drive structure 8 includes a spring top plate 8-1 and an injection spring 8-2. The spring top plate 8-1 is located between the first flange 7-3-1 and the second flange 7-3-2. The injection spring 8-2 is sleeved on the piston rod 7-3. The upper and lower ends of the injection spring 8-2 abut against the spring top plate 8-1 and the first flange 7-3-1, respectively.

[0037] The piston rod drive structure 10 includes a drive sleeve 10-1 and an unlocking rod 10-2. The drive sleeve 10-1 is sleeved on the piston rod 7-3 and located between the second flange 7-3-2 and the third flange 7-3-3. The drive sleeve 10-1 is connected to the push rod 4-2, and the unlocking rod 10-2 is connected to the drive sleeve 10-1.

[0038] The piston rod positioner 9 is connected to the trash can housing 1 and is located between the second flange 7-3-2 and the third flange 7-3-3. The piston rod positioner 9 includes a locking tongue 9-1 that extends under the action of the positioner spring 9-2.

[0039] When the top rod 4-2 moves upward, the drive sleeve 10-1 drives the piston rod 7-3 to move upward, the piston 7-2 moves upward, the spray nozzle 7-1 draws in disinfectant, the second flange 7-3-2 moves above the locking tongue 9-1, and the locking tongue 9-1 restricts the piston rod 7-3 from moving downward; when the top rod 4-2 moves downward, and the trash can lid 3 is closed or close to being closed, the unlocking rod 10-2 drives the locking tongue 9-1 to retract, the spray spring 8-2 drives the piston rod 7-3 to move downward, and the piston 7-2 moves downward to press out disinfectant.

[0040] When using this invention, as with conventional trash cans, simply pressing and releasing the foot pedal 4-1 sprays disinfectant without any additional operation, achieving a high degree of automation and ease of use. The disinfectant is sprayed when the trash can lid 3 is on or near the lid, ensuring an appropriate spraying time.

[0041] The specific working process of this invention is as follows: I. As Figure 7 As shown, pressing the foot pedal 4-1 raises the push rod 4-2, opening the trash can lid 3, allowing trash to be disposed of. Simultaneously, the push rod 4-2 drives the piston rod drive structure 10 to rise, causing the drive sleeve 10-1 to rise and press against the third flange 7-3-3, thus raising the piston rod 7-3. The piston rod 7-3 drives the piston 7-2 to rise, creating a negative pressure inside the spray cylinder 7-1. This opens the suction one-way valve 6-3, allowing disinfectant from the disinfectant bottle 5 to enter the spray cylinder 7-1 through the suction pipe 6-1. Simultaneously, the second flange 7-3-2 moves upward, pushing the locking tongue 9-1 back. After the locking tongue 9-1 retracts, the second flange 7-3-2 moves upward above the locking tongue 9-1. The locking tongue 9-1 extends under the action of the positioner spring 9-2, cushioning the second flange 7-3-2, thus restricting the downward movement of the piston rod 7-3. At the same time, the spray spring 8-2 is also compressed by the upward movement of the first flange 7-3-1.

[0042] II. Figure 8 As shown, after garbage is deposited, releasing the foot pedal 4-1 causes the top rod 4-2 to move downwards. During this downward movement, the garbage can lid 3 gradually rotates downwards. Simultaneously, the piston rod drive structure 10 moves downwards along with the top rod 4-2. At this time, the piston rod 7-3 remains stationary due to the locking tongue 9-1 restricting its downward movement. Until the garbage can lid 3 is closed or nearly closed, the unlocking rod 10-2 drives the locking tongue 9-1 to retract, and the piston rod 7-3 loses its position. At this point, the piston rod 7-3 moves downwards under the rebound of the spray spring 8-2, and the piston 7-2 downwards presses out disinfectant. The pressure of the disinfectant causes the discharge check valve 6-4 to open, and the disinfectant is delivered to the sprayer 11 through the discharge pipe 6-2 and sprayed out.

[0043] The reason why the piston rod 7-3 of this invention is not directly connected to the top rod 4-2 is that if the two are directly connected, the trash can lid 3 will start to rotate downwards, and the disinfectant will be sprayed out. The disinfectant is sprayed forward and cannot reach the trash can body 2.

[0044] This invention allows for the placement of garbage bags on the garbage can body 2 to hold garbage. When the garbage can lid 3 is opened, the garbage bag can be removed, and the garbage can body 2 can also be removed. The power for the disinfectant spray comes from the rebound of the spray spring 8-2. The spring force provided by the spray spring 8-2 should be relatively large to ensure the spraying effect. Ideally, when the garbage can lid 3 is closed, the unlocking rod 10-2 should drive the locking tongue 9-1 to retract into place, and the piston rod 7-3 should move downward under the rebound of the spray spring 8-2, causing the piston 7-2 to press out the disinfectant. However, this state is difficult to achieve due to inevitable errors in the manufacturing of parts; therefore, it is also possible for the unlocking rod 10-2 to drive the locking tongue 9-1 to retract into place just before the garbage can lid 3 is closed, and the disinfectant can still be sprayed into the garbage can body 2.

[0045] In step one of the working process of the present invention, ideally, when the trash can lid 3 is fully open, the locking tongue 9-1 is positioned directly under the second flange 7-3-2. However, this is difficult to achieve due to inevitable manufacturing errors in the components. Therefore, it can be designed so that when the trash can lid 3 is fully open, the second flange 7-3-2 is 2-3 mm higher than the locking tongue 9-1. In this way, even with manufacturing errors, the second flange 7-3-2 can still move above the locking tongue 9-1. However, in step two of the working process of the present invention, the piston rod 7-3 will first move downwards a small section until the second flange 7-3-2 is in contact with the locking tongue 9-1, resulting in a small amount of disinfectant being sprayed out. Although there is no obvious disadvantage, it is not the optimal choice.

[0046] Based on the reasons described above, the piston rod 7-3 of the present invention preferably includes an upper section 7-3-4 and a lower section 7-3-5. The lower section 7-3-5 has an insertion hole 7-3-6. The upper section 7-3-4 is inserted into and mates with the insertion hole 7-3-6. Air is sealed inside the insertion hole 7-3-6. The first flange 7-3-1, the second flange 7-3-2, and the third flange 7-3-3 are all provided on the upper section 7-3-4. A piston limiting sleeve 7-1-1 is provided at the upper end of the injection cylinder 7-1.

[0047] The significance of this design is that the piston rod 7-3 can extend slightly, ensuring that even with manufacturing errors, the second flange 7-3-2 can still move above the latch 9-1, and the disinfectant will not spray out prematurely. Specifically, in step one of the working process of this invention, when the piston rod 7-3 moves up until the piston 7-2 is in contact with the piston limiting sleeve 7-1-1, the trash can lid 3 is almost fully open, and the second flange 7-3-2 is still slightly lower than the upper surface of the latch 9-1. At this time, the push rod 4-2 can still move up a small section (2-3mm), and the upper section 7-3-4 of the piston rod also moves up a small section. The air sealed inside the insertion hole 7-3-6 can expand slightly, so that although the lower section 7-3-5 of the piston rod cannot move up, the upper section 7-3-4 of the plug rod can move up slightly, ensuring that the second flange 7-3-2 is above the latch 9-1. In step two of the working process of this invention, the upper section 7-3-4 of the piston rod moves down a small section so that the second flange 7-3-2 abuts against the locking tongue 9-1. During this process, only the piston rod 7-3 shortens under the air contraction effect sealed inside the insertion hole 7-3-6. The lower section 7-3-5 of the piston rod does not move down and does not press out the disinfectant. Therefore, the disinfectant is not sprayed out in advance.

[0048] The specific structure of piston rod positioner 9 is as follows: Figure 4 As shown, the piston rod positioner 9 includes a positioner housing 9-3 and a control plate 9-4. The positioner housing 9-3 has a latch hole 9-3-1 and a side wall elongated hole 9-3-2. The latch 9-1 is inserted into the latch hole 9-3-1, and the end face of the latch 9-1 is a latch chamfer 9-1-1. The control plate 9-4 passes through the side wall elongated hole 9-3-2 and is connected to the latch 9-1. The control plate 9-4 has a control plate chamfer 9-4-1. The unlocking rod 10-2 moves down to push the control plate chamfer 9-4-1, causing the control plate 9-4 to retract and the latch 9-1 to retract. The second flange 7-3-2 moves up to push the latch chamfer 9-1-1, causing the latch 9-1 to retract.

[0049] The disinfectant bottle 5 is installed as follows: the trash can shell 1 has a disinfectant bottle mounting hole 1-1, and the disinfectant bottle 5 is threaded into the disinfectant bottle mounting hole 1-1. The disinfectant bottle 5 can then be removed to add disinfectant. Preferably, the disinfectant bottle 5 is transparent, and the corresponding part of the trash can shell 1 where the disinfectant bottle 5 is located is also preferably transparent, so that the remaining amount of disinfectant in the bottle 5 can be seen, allowing for timely addition of disinfectant.

[0050] The spray nozzle 11 can adopt the structure of an existing shower head, that is, the spray nozzle 11 is disc-shaped and has multiple spray holes on its lower surface. Preferably, the spray nozzle 11 is detachably connected to the trash can lid 3. In this way, when the spray holes are clogged, the spray nozzle 11 can be removed for cleaning.

[0051] The lid-driving structure 4 is similar to the foot-operated opening structure of existing trash cans, but because this invention requires the top rod 4-2 to move linearly up and down, it also differs from existing technologies, specifically as follows: Figure 1 , Figure 5 and Figure 6 As shown: The lid drive structure 4 includes a guide sleeve 4-3, which is fitted onto the top rod 4-2 and connected to the garbage can shell 1; the garbage can lid 3 is provided with a vertical rod 3-1, and the vertical rod 3-1 is provided with an upper hinge shaft 3-2; the middle part of the foot pedal 4-1 is hinged to the garbage can shell 1, one end of the foot pedal 4-1 protrudes from the garbage can shell 1, and the other end has a foot pedal elongated hole 4-1-1 provided along the length direction of the foot pedal 4-1; the upper end of the top rod 4-2 has a top rod elongated hole 4-2-1 provided in a horizontal direction, and the lower end of the top rod 4-2 is provided with a lower hinge shaft 4-2-2; the upper hinge shaft 3-2 is inserted into the top rod elongated hole 4-2-1, and the lower hinge shaft 4-2-2 is inserted into the foot pedal elongated hole 4-1-1.

[0052] The guide sleeve 4-3 is used to guide the linear movement of the push rod 4-2 in the up-down direction. The guide sleeve 4-3 moves linearly, while the vertical rod 3-1 and the foot pedal 4-1 both rotate. Therefore, it is necessary to provide an elongated hole 4-2-1 for the push rod and an elongated hole 4-1-1 for the foot pedal to avoid motion interference.

[0053] The trash can lid 3 can be closed by its own weight. Alternatively, the weight of the trash can lid 3 can cause the unlocking lever 10-2 to push the control plate 9-4. However, to ensure a proper fit between the trash can lid 3 and the trash can shell 1, and to facilitate the unlocking lever 10-2 pushing the control plate 9-4, the following configuration can be made: the lid drive structure 4 includes a lower push spring 4-4, which is fitted onto the push rod 4-2 and pushes the push rod 4-2 downwards.

[0054] In this invention, all components are driven by pressing the foot pedal 4-1. Compared to conventional trash cans, pressing the foot pedal 4-1 in this invention requires additional force to compress the lower top spring 4-4 ​​and the jet spring 8-2. Therefore, pressing the foot pedal 4-1 requires more force than in the prior art, but it is easily achievable by an average person's foot.

Claims

1. A medical waste bin with a disinfectant spraying function, comprising a waste bin body (2), a waste bin shell (1), a waste bin lid (3), and a lid driving structure (4), wherein the waste bin body (2) is placed inside the waste bin shell (1), the waste bin lid (3) covers the waste bin shell (1), and the lid driving structure (4) comprises a foot pedal (4-1) and a push rod (4-2), wherein the foot pedal (4-1) can drive the push rod (4-2) to lift the waste bin lid (3); characterized in that: It includes a disinfectant bottle (5), a spray structure (7), a spray drive structure (8), a piston rod drive structure (10), a piston rod positioner (9), a sprayer (11), and a disinfectant pipeline (6); the top rod (4-2) can move linearly up and down; the sprayer (11) is connected to the trash can lid (3); The disinfectant bottle (5) is connected to the garbage can shell (1); the spray structure (7) is arranged in the vertical direction. The spray structure (7) includes a spray tube (7-1), a piston (7-2) and a piston rod (7-3). The piston (7-2) is located inside the spray tube (7-1) and cooperates with the spray tube (7-1). The piston rod (7-3) is connected to the piston (7-2). The piston rod (7-3) has a first flange (7-3-1), a second flange (7-3-2) and a third flange (7-3-3) arranged sequentially from bottom to top. The disinfectant pipeline (6) includes an inhalation pipe (6-1) and an outlet pipe (6-2). Both the inhalation pipe (6-1) and the outlet pipe (6-2) are connected to the spray tube (7-1). The inhalation pipe (6-1) is inserted into the disinfectant bottle (5), and the outlet pipe (6-2) is connected to the sprayer (11). The inhalation pipe (6-1) is equipped with an inhalation check valve (6-3) that can open in one direction towards the spray tube (7-1), and the outlet pipe (6-2) is equipped with an outlet check valve (6-4) that can open in one direction towards the sprayer (11). The injection drive structure (8) includes a spring top plate (8-1) and an injection spring (8-2). The spring top plate (8-1) is located between the first flange (7-3-1) and the second flange (7-3-2). The injection spring (8-2) is sleeved on the piston rod (7-3). The upper and lower ends of the injection spring (8-2) abut against the spring top plate (8-1) and the first flange (7-3-1) respectively. The piston rod drive structure (10) includes a drive sleeve (10-1) and an unlocking rod (10-2). The drive sleeve (10-1) is sleeved on the piston rod (7-3) and located between the second flange (7-3-2) and the third flange (7-3-3). The drive sleeve (10-1) is connected to the push rod (4-2), and the unlocking rod (10-2) is connected to the drive sleeve (10-1). The piston rod positioner (9) is connected to the garbage can housing (1) and located between the second flange (7-3-2) and the third flange (7-3-3). The piston rod positioner (9) includes a locking tongue (9-1) that extends under the action of the positioner spring (9-2). When the push rod (4-2) moves upward, the drive sleeve (10-1) drives the piston rod (7-3) to move upward, the piston (7-2) moves upward, the spray nozzle (7-1) draws in disinfectant, the second flange (7-3-2) moves above the locking tongue (9-1), and the locking tongue (9-1) restricts the piston rod (7-3) from moving downward; when the push rod (4-2) moves downward, and the trash can lid (3) is closed or close to being closed, the unlocking rod (10-2) drives the locking tongue (9-1) to retract, the spray spring (8-2) drives the piston rod (7-3) to move downward, and the piston (7-2) moves downward to press out disinfectant.

2. The medical waste bin with disinfectant spraying function according to claim 1, characterized in that: The piston rod (7-3) includes an upper section (7-3-4) and a lower section (7-3-5). The lower section (7-3-5) has a insertion hole (7-3-6). The upper section (7-3-4) is inserted into the insertion hole (7-3-6) and mates with it. The insertion hole (7-3-6) is sealed with air. The first flange (7-3-1), the second flange (7-3-2), and the third flange (7-3-3) are all provided on the upper section (7-3-4). The upper end of the injection cylinder (7-1) is provided with a piston limiting sleeve (7-1-1).

3. The medical waste bin with disinfectant spraying function according to claim 1, characterized in that: The piston rod positioner (9) includes a positioner housing (9-3) and a control plate (9-4). The positioner housing (9-3) has a latch hole (9-3-1) and a side wall elongated hole (9-3-2). The latch (9-1) is inserted into the latch hole (9-3-1), and the end face of the latch (9-1) is a latch chamfer (9-1-1). The control plate (9-4) passes through the side wall elongated hole (9-3-2) and is connected to the latch (9-1). The control plate (9-4) has a control plate chamfer (9-4-1). The unlocking rod (10-2) moves down to push the control plate chamfer (9-4-1) so that the control plate (9-4) retracts and drives the latch (9-1) to retract. The second flange (7-3-2) moves up to push the latch chamfer (9-1-1) so that the latch (9-1) retracts.

4. The medical waste bin with disinfectant spraying function according to claim 1, characterized in that: The garbage can shell (1) has a disinfectant bottle mounting hole (1-1), and the disinfectant bottle (5) is threadedly connected to the disinfectant bottle mounting hole (1-1).

5. The medical waste bin with disinfectant spraying function according to claim 1, characterized in that: The ejector (11) is disc-shaped, and has multiple ejection holes on its lower surface.

6. The medical waste bin with disinfectant spraying function according to claim 5, characterized in that: The nozzle (11) is detachably connected to the trash can lid (3).

7. The medical waste bin with disinfectant spraying function according to claim 1, characterized in that: The lid drive structure (4) includes a guide sleeve (4-3), which is fitted onto the top rod (4-2) and connected to the garbage can shell (1); a vertical rod (3-1) is provided on the garbage can lid (3), and an upper hinge shaft (3-2) is provided on the vertical rod (3-1); the middle part of the foot pedal (4-1) is hinged to the garbage can shell (1), one end of the foot pedal (4-1) protrudes from the garbage can shell (1), and the other end has a foot pedal elongated hole (4-1-1) arranged along the length direction of the foot pedal (4-1); the upper end of the top rod (4-2) has a top rod elongated hole (4-2-1) arranged in a horizontal direction, and the lower end of the top rod (4-2) is provided with a lower hinge shaft (4-2-2); the upper hinge shaft (3-2) is inserted into the top rod elongated hole (4-2-1), and the lower hinge shaft (4-2-2) is inserted into the foot pedal elongated hole (4-1-1).

8. The medical waste bin with disinfectant spraying function according to claim 7, characterized in that: The bucket lid drive structure (4) includes a lower push spring (4-4), which is mounted on the push rod (4-2) and pushes the push rod (4-2) downward.

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