Air pump device and water-gas system of endoscope

Abstract

The embodiment of the invention provides an air pump device and a water-air system of an endoscope, and relates to the field of endoscopes. The air pump device comprises a first air bin shell, a second air bin shell, a sealing cover and a pressurizing assembly, the second air bin shell is connected with the first air bin shell in a sealed mode, an air inlet chamber and an air outlet chamber are formed by the first air bin shell and the second air bin shell, and an air inlet valve piece and an air outlet valve piece are further installed on the second air bin shell; the sealing cover is connected with the second air bin shell in a sealed mode, the sealing cover and the second air bin shell form a compression chamber, the air inlet chamber and the compression chamber can be communicated through the air inlet valve piece, and the air outlet chamber and the compression chamber can be communicated through the air outlet valve piece. When the air inlet chamber and the compression chamber are communicated through the air inlet valve piece, air in the air inlet chamber enters the compression chamber, the pressurization assembly applies constant pressure to the air in the compression chamber, and therefore air can be stably supplied. The embodiment of the invention further provides a water-gas system of the endoscope. The water-gas system comprises a sound and dust reducing device, a water supply assembly, a gas conveying assembly and an air pump device.

Description

Technical Field

[0001] The present invention relates to the field of endoscopes, and in particular to an air pump device and a water-gas system of an endoscope. Background Art

[0002] As an inspection and treatment device, the endoscope can help doctors quickly and accurately determine the diseased area and degree of the disease in the body cavity. For example, with the help of the endoscope, the doctor can observe stones or tumors in the patient's body, and at the same time combine the working channel, water and gas channel of the endoscope to implement treatment, remove stones or remove tumors.

[0003] During inspection and treatment using an endoscope, air supply is usually required to clear dirt on the observation or treatment path. Currently, air supply for endoscopes is achieved by air pumps, but existing air pumps operate unsteadily and cannot provide stable air supply, making them inconvenient to use during inspection and treatment operations. Summary of the Invention

[0004] The present invention provides an air pump device and a water-gas system of an endoscope, which can solve the problem of unstable air supply caused by unstable operation of the existing air pump.

[0005] The embodiments of the present invention can be implemented as follows: An embodiment of the present invention provides an air pump device, comprising: a first air tank shell; a second air silo shell, the second air silo shell being sealedly connected to the first air silo shell, the first air silo shell and the second air silo shell forming an air inlet chamber and an air outlet chamber, the air inlet chamber and the air outlet chamber being isolated, and an air inlet valve member and an air outlet valve member being further installed on the second air silo shell; The sealing cover is sealed with the second air storage shell, and the sealing cover and the second air storage shell form a compression chamber. The air inlet valve member can connect or close the air inlet chamber and the compression chamber, and the air outlet valve member can connect or close the air outlet chamber and the compression chamber. The air inlet valve member is used to introduce the gas in the air inlet chamber into the compression chamber, and the air outlet valve member is used to introduce the gas in the compression chamber into the air outlet chamber. The pressurizing component is used to apply constant pressure to the gas in the compression chamber.

[0006] Optionally, the pressurizing component includes a pushing member and an eardrum, the eardrum is sealed and connected to the cover, the eardrum, the cover and the second air chamber shell together form a compression chamber, the pushing member is connected to the eardrum, and the pushing member can push the eardrum to move to change the volume of the compression chamber.

[0007] Optionally, the pushing member includes a crank and a power member, one end of the crank is fixedly connected to the eardrum, and the other end of the crank is movably connected to the power member, and the power member is used to push the crank to move to drive the eardrum to move; The pressurizing assembly also includes a centrifugal cam and a bearing. The power part is a motor. The centrifugal cam is fixed to the output shaft of the motor. One end of the crank is arranged on the outside of the centrifugal cam and is connected through a bearing. When the motor drives the centrifugal cam, the centrifugal cam pushes the crank to move, and the direction of the centrifugal force generated by the centrifugal cam is consistent with the movement direction of the crank.

[0008] Optionally, an air inlet hole and an air outlet hole are provided on the second air storage shell, the air inlet hole connects the air inlet chamber and the compression chamber, and the air outlet hole connects the air outlet chamber and the compression chamber; the air inlet valve member can close or open the air inlet hole, and the air outlet valve member can close or open the air outlet hole.

[0009] An embodiment of the present invention also provides a water and gas system for an endoscope, comprising a noise reduction and dust reduction device, a water supply component, a gas delivery component and the air pump device. The noise reduction and dust reduction device, the air pump device and the gas delivery component are connected in sequence, and the water supply component is connected to the gas delivery component.

[0010] Optionally, the water-gas system further comprises a chassis, the noise and dust reduction device and the air pump device are both arranged inside the chassis, and a ventilation groove is further provided on the wall of the chassis; The water and gas system also includes a fixed bracket and a connecting bracket. The fixed bracket is connected to the chassis, the connecting bracket is connected to the air pump device, and the connecting bracket is connected to the fixed bracket so that the air pump device is spaced apart from the chassis. A buffer is provided at the connection between the connecting bracket and the fixed bracket.

[0011] Optionally, the buffer member includes a first connecting portion, a second connecting portion and a buffer portion, and the buffer portion is located between the first connecting portion and the second connecting portion; The first connecting portion is provided with a first card slot, the second connecting portion is provided with a second card slot, the fixing bracket is clamped in the first card slot, and the connecting bracket is clamped in the second card slot.

[0012] Optionally, the noise reduction and dust reduction device is connected to the air pump device through a first air duct, and the first air duct is connected to the air intake chamber. The noise reduction and dust reduction device is used to filter the air and provide clean air to the air intake chamber.

[0013] Optionally, the noise and dust reduction device includes an air inlet pipe, a filter element, a filter element mounting shell, an air inlet connecting seat and an air outlet connecting seat. The filter element is accommodated in the filter element mounting shell. The air inlet connecting seat and the air outlet connecting seat are respectively arranged at both ends of the filter element mounting shell and are connected to the filter element mounting shell. The air inlet pipe is connected to the air inlet connecting seat. The air input by the air inlet pipe can enter the filter element through the air inlet connecting seat, and the air filtered by the filter element can be discharged through the air outlet connecting seat.

[0014] Optionally, the filter element includes a pre-filtration layer, a moisture-proof and antibacterial layer, a main filtration layer and a noise reduction layer.

[0015] Optionally, the outer sleeve of the filter element mounting housing is provided with a shock-absorbing and anti-slip sleeve; The water-gas system also includes a chassis, a quick-release bracket is fixed inside the chassis, and a shock-absorbing and anti-slip sleeve is installed on the quick-release bracket.

[0016] Optionally, the intake end of the intake pipe is a conical bell mouth, the diameter of the large diameter end of the conical bell mouth is D1, the diameter of the small diameter end of the conical bell mouth is D2, the distance between the large diameter end and the small diameter end is L, and the semi-cone angle value θ of the conical bell mouth satisfies the relationship tanθ=(D1−D2) / 2L, 10°≤θ≤15°.

[0017] Optionally, the noise and dust reduction device further includes a quick-release assembly, which is arranged at the air inlet connection seat, and / or the quick-release assembly is arranged at the air outlet connection seat.

[0018] Optionally, the quick-release assembly includes a switch buckle, a locking screw, a spring, and a locking column, the switch buckle is threadedly connected to the air intake connection seat, and the switch buckle sleeve is arranged on the outside of the air intake pipe; The lock cylinder has an oblique surface, and the switch buckle has an end oblique surface, and the end oblique surface and the oblique surface are slidably matched; The air intake connecting seat is provided with a radial through hole, and the lock column, locking screw and spring are all accommodated in the radial through hole. The spring is arranged between the lock column and the locking screw. The locking screw is threadedly connected to the air intake connecting seat, and the lock column is movably connected to the air intake pipe to clamp or fall off the air intake pipe.

[0019] Optionally, the gas delivery component is connected to the air pump device through a second air duct, and the second air duct is connected to the air outlet chamber. The gas delivery component is used to deliver gas to the endoscope or apply water supply pressure to the water supply component.

[0020] Optionally, the gas delivery assembly includes a pipe joint and an air supply pipe, a three-way interface is provided inside the pipe joint, the first port of the three-way interface is connected to the air supply pipe, the second port of the three-way interface is connected to the second air guide pipe, and the third port of the three-way interface is connected to the water supply assembly.

[0021] Optionally, the water supply assembly includes a water-gas pipe and a check valve, a liquid flow channel and an air flow channel are arranged inside the water-gas pipe, and the check valve is arranged in the liquid flow channel.

[0022] Beneficial effects of the embodiments of the present invention: The air pump device of the embodiment of the present invention includes a first air storage shell, a second air storage shell, a sealing cover and a pressurizing component, the second air storage shell is sealed with the first air storage shell, the first air storage shell and the second air storage shell form an air inlet chamber and an air outlet chamber, the air inlet chamber is isolated from the air outlet chamber, and an air inlet valve member and an air outlet valve member are also installed on the second air storage shell; the sealing cover is sealed with the second air storage shell, and the sealing cover and the second air storage shell form a compression chamber, the air inlet chamber and the compression chamber can be connected or closed by the air inlet valve member, and the air outlet chamber and the compression chamber can be connected or closed by the air outlet valve member. When the air inlet valve member connects the air inlet chamber and the compression chamber, the air inlet The gas in the room enters the compression chamber, and the pressurizing component applies a constant pressure to the gas in the compression chamber. Then the outlet valve member connects the outlet chamber and the compression chamber, and the pressurized gas in the compression chamber enters the outlet chamber. Since the input, pressurization and discharge of the gas need to pass through the air inlet chamber, compression chamber and outlet chamber in sequence, the problem of fluctuating gas pressure during use is avoided, so that the gas can be supplied stably. At the same time, the pressurizing component pressurizes the gas in the compression chamber at a constant pressure, so that the pressure of the gas discharged each time is similar, thereby making the gas supply more stable, overcoming the defect that the existing air pump cannot supply gas stably.

[0023] The water-gas system of the endoscope in an embodiment of the present invention includes a noise reduction and dust reduction device, a water supply component, a gas delivery component and the air pump device. The noise reduction and dust reduction device, the air pump device and the gas delivery component are connected in sequence, and the water supply component is connected to the gas delivery component. The water-gas system has all the functions of the air pump device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the internal structure of a water and gas system of an endoscope provided in an embodiment of the present invention; Figure 2 Schematic diagram of the overall structure of the water and gas system of the endoscope provided in an embodiment of the present invention; Figure 3 A diagram showing the connection structure between the air pump device and the noise and dust reduction device provided in an embodiment of the present invention; Figure 4 A schematic diagram of the arrangement of the fixing bracket and the connecting bracket provided in an embodiment of the present invention; Figure 5 A schematic diagram of the three-dimensional structure of an air pump device provided in an embodiment of the present invention; Figure 6This is a schematic top view of the air pump device provided in an embodiment of the present invention with the protective housing removed; Figure 7 for Figure 6 Schematic cross-section of the middle AA; Figure 8 A schematic diagram of the connection between the centrifugal cam and the crank provided in an embodiment of the present invention; Figure 9 A schematic structural diagram of a buffer provided in an embodiment of the present invention; Figure 10 A schematic diagram of a noise and dust reduction device provided in an embodiment of the present invention from a first perspective; Figure 11 A schematic diagram of the noise and dust reduction device provided in an embodiment of the present invention from a second perspective; Figure 12 This is a schematic axial cross-sectional view of a noise and dust reduction device provided in an embodiment of the present invention; Figure 13 A schematic cross-sectional view along the radial direction of a filter element provided in an embodiment of the present invention; Figure 14 A schematic diagram of the cooperation between the filter element and the air intake connector provided in an embodiment of the present invention; Figure 15 A schematic structural diagram of the connection between the gas delivery component and the water supply component provided in an embodiment of the present invention; Figure 16 This is a schematic diagram of the structure of the connection between the gas delivery component and the water supply component provided in an embodiment of the present invention after the pipe joint is hidden; Figure 17 A schematic diagram of the coordination between the selection button and the switching valve provided in an embodiment of the present invention; Figure 18 A schematic diagram of a sealing end head provided in an embodiment of the present invention; Figure 19 for Figure 18 Schematic cross-section of the BB.

[0026] icon: 1-air pump device; 10-first air chamber shell; 101-air inlet chamber; 102-air outlet chamber; 11-second air chamber shell; 111-air inlet valve member; 112-air outlet valve member; 113-air inlet hole; 114-air outlet hole; 12-sealing cover; 121-compression chamber; 13-pressurizing assembly; 130-tympanic membrane; 131-crank; 132-chuck; 133-power member; 1331-output shaft; 134-centrifugal cam; 1341-eccentric small wheel; 1342-eccentric large wheel; 135-bearing; 136-protective housing; 2-Noise and dust reduction device; 20-Inlet pipe; 21-Filter element; 211-Pre-filter layer; 212-Moisture-proof and antibacterial layer; 213-Main filter layer; 214-Noise reduction layer; 22-Filter element mounting housing; 221-Annular chamber; 23-Inlet connector; 231-Radial through hole; 232-Axial blind hole; 233-Lateral hole; 24-Outlet connector; 25-Shock-absorbing and anti-slip sleeve; 26-Quick release assembly; 261-Switch buckle; 2611-End bevel; 262-Locking screw; 263-Spring; 264-Lock column; 2641-Beveled surface; 27-Airtight fitting; 3-gas delivery assembly; 30-tube connector; 31-tee interface; 32-gas supply pipe; 33-tube shell; 34-sheath; 35-selection button; 36-switching valve; 4-water supply assembly; 40-water gas tank; 41-water gas pipe; 411-liquid flow channel; 4111-straight joint; 412-air flow channel; 4121-two-way joint; 42-water supply pipe; 43-check valve; 44-sealing end; 5 - Chassis; 50 - Ventilation slot; 51 - Fixing bracket; 52 - Connecting bracket; 53 - Buffer; 531 - First connecting portion; 5311 - First slot; 532 - Second connecting portion; 5321 - Second slot; 533 - Buffer; 54 - Sound-absorbing pad; 55 - Quick-release bracket; 6-first airway tube; 7-second airway tube; 8-endoscope. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0032] The terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0033] Unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] It should be noted that for the aforementioned various method embodiments, for simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, some steps can be performed in other orders or simultaneously. The steps in the method embodiments of this application can be adjusted in order, combined, or deleted according to actual needs.

[0035] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0036] As an inspection and treatment device, an endoscope can help doctors quickly and accurately determine the area and extent of lesions in the body cavity and perform surgical operations. The use of an endoscope during inspection and treatment usually requires water and air supply to remove dirt from the observation or treatment path. Currently, the air supply of endoscopes is achieved by air pumps, but the existing air pumps are unstable and cannot provide stable air supply. In addition, the air pumps are noisy and dust will accumulate in the ventilation pipes of the air pumps, which can easily have an adverse effect on the patient's health during use. At the same time, the water and air supply pipes are complex to arrange and difficult to disassemble and maintain, which seriously affects their use.

[0037] In view of this, an embodiment of the present invention provides an air pump device and a water gas system of an endoscope. The water gas system of the endoscope includes the air pump device. Therefore, the water gas system and the air pump device of the endoscope can solve the above problems. The water gas system of the endoscope is as follows: Figure 1 and Figure 2 , which will be described in detail next.

[0038] Please refer to Figures 3 to 8 The air pump device 1 includes a first air storage shell 10, a second air storage shell 11, a sealing cover 12 and a pressurizing component 13. The second air storage shell 11 is sealed with the first air storage shell 10. The first air storage shell 10 and the second air storage shell 11 form an air inlet chamber 101 and an air outlet chamber 102. The air inlet chamber 101 is isolated from the air outlet chamber 102. The second air storage shell 11 is also equipped with an air inlet valve member 111 and an air outlet valve member 112; the sealing cover 12 is sealed with the second air storage shell 11, and the sealing cover 12 and the second air storage shell 11 form a compression chamber 121. The air inlet valve member 111 can connect or close the air inlet chamber 101 and the air outlet chamber 102 can connect or close the air outlet chamber 121.

[0039] The intake valve member 111 can close or open the connection passage between the intake chamber 101 and the compression chamber 121, and the outlet valve member 112 can close or open the connection passage between the outlet chamber 102 and the compression chamber 121. When the intake valve member 111 opens the intake chamber 101 and the compression chamber 121, the gas in the intake chamber 101 enters the compression chamber 121, and the pressurizing component 13 applies a constant pressure to the gas in the compression chamber 121. Then, the outlet valve member 112 opens the outlet chamber 102 and the compression chamber 121, and the pressurized gas in the compression chamber 121 enters the outlet chamber 102. The input, pressurization and discharge of the gas need to pass through the air inlet chamber 101, the compression chamber 121 and the air outlet chamber 102 in sequence. The volume and pressure of the gas entering the air inlet chamber 101, the compression chamber 121 and the air outlet chamber 102 are the same each time, thereby avoiding the problem of fluctuating pressure of the discharged gas, so that the endoscope 8 can be stably supplied with gas. At the same time, the pressurizing component 13 pressurizes the gas in the compression chamber 121 at a constant pressure, so that the pressure of the gas discharged each time is similar, thereby making the air supply more stable, overcoming the defect that the existing air pump cannot supply gas stably.

[0040] Specifically, refer to Figure 6 and Figure 7 The first air tank shell 10 has two recessed chambers. When the first air tank shell 10 and the second air tank shell 11 are connected, the two recessed chambers on the first air tank shell 10 and the wall surface of the second air tank shell 11 form an air inlet chamber 101 and an air outlet chamber 102. Of course, a circle of sealing gaskets is provided between the first air tank shell 10 and the second air tank shell 11 to ensure the sealed connection between the first air tank shell 10 and the second air tank shell 11. The second air tank shell 11 also has a recessed chamber. The second air tank shell 11 is connected to the sealing cover 12. The recessed chamber cooperates with the wall surface of the sealing cover 12 to form a compression chamber 121.

[0041] To direct the gas from the intake chamber 101 into the compression chamber 121, the intake valve member 111 may utilize a one-way valve. The one-way valve connects the intake chamber 101 and the compression chamber 121. When the gas pressure in the intake chamber 101 reaches a preset value, the gas in the intake chamber 101 pushes open the valve core of the one-way valve and enters the compression chamber 121. Similarly, to direct the gas from the compression chamber 121 into the outlet chamber 102, the outlet valve member 112 may also utilize a one-way valve. When the gas pressure in the compression chamber 121 reaches a preset value, the gas in the compression chamber 121 pushes open the valve core of the one-way valve and enters the outlet chamber 102. It should be noted that the ventilation direction of the one-way valve between the intake chamber 101 and the compression chamber 121 is opposite to that of the one-way valve between the compression chamber 121 and the outlet chamber 102. That is, the gas in the compression chamber 121 can only flow out of the one-way valve at the outlet chamber 102.

[0042] Of course, an air inlet hole 113 and an air outlet hole 114 may also be provided on the second air tank shell 11. The air inlet hole 113 connects the air inlet chamber 101 with the compression chamber 121, and the air outlet hole 114 connects the air outlet chamber 102 with the compression chamber 121. The air inlet valve member 111 and the air outlet valve member 112 both include a cover portion having tough and flexible properties, which can cover and seal the air inlet hole 113 and the air outlet hole 114. The covering portion of this embodiment is disc-shaped and is made of a rubber sheet, a silicone sheet or a plastic sheet. It does not take up space and has good sealing performance. The covering portion of the intake valve member 111 is located on one side of the compression chamber 121. When the gas pressure in the intake chamber 101 is not enough to push open the covering portion of the intake valve member 111, the covering portion of the intake valve member 111 covers the intake through hole 113, and the intake chamber 101 is isolated from the compression chamber 121. When the gas pressure in the intake chamber 101 can push open the covering portion of the intake valve member 111, the gas in the intake chamber 101 enters the compression chamber 121 through the intake through hole 113. The covering part of the outlet valve member 112 is located on one side of the outlet chamber 102. When the gas pressure in the compression chamber 121 is not enough to push open the covering part of the outlet valve member 112, the covering part of the outlet valve member 112 covers the outlet hole 114, and the outlet chamber 102 is isolated from the compression chamber 121. When the gas pressure in the compression chamber 121 can push open the covering part of the outlet valve member 112, the gas in the compression chamber 121 enters the outlet chamber 102 through the outlet hole 114.

[0043] Regardless of whether the air inlet valve member 111 and the air outlet valve member 112 are one-way valves or made of rubber sheets, silicone sheets or plastic sheets, leakage of compressed gas in the compression chamber 121 can be avoided, thereby improving the use efficiency of compressed gas.

[0044] The pressurizing component 13 is used to pressurize the gas in the compression chamber 121. The pressurizing component 13 is arranged on the side of the cover 12. A large circular through hole is opened in the middle of the cover 12. The large circular through hole is connected to the compression chamber 121. The pressurizing component 13 pressurizes the gas in the compression chamber 121 through the large circular through hole.

[0045] refer to Figures 6 to 8The pressurizing assembly 13 includes a pusher and a drum 130. The edge of the drum 130 covers the wall of the large circular hole and is pressed against by the second air chamber shell 11. The first air chamber shell 10, the second air chamber shell 11, the drum 130, and the cover 12 are sequentially connected and fastened together by a plurality of long screws passing through. The drum 130, the cover 12, and the second air chamber shell 11 together form a compression chamber 121. The pusher is connected to the drum 130. When the pusher pushes the drum 130 toward the compression chamber 121, the volume of the compression chamber 121 decreases. Conversely, when the pusher pulls the drum 130 to expand the compression chamber 121, the volume of the compression chamber 121 increases. The pusher can be a push rod motor, a hydraulic cylinder, a pneumatic cylinder, or any other type of drive device. The drum 130 can be made of a rubber diaphragm with good elasticity, sealing, and stability. Of course, the drum 130 can also be made of other materials that meet the requirements.

[0046] In this embodiment, the pushing member includes a crank 131, a chuck 132, and a power member 133. One end of the crank 131 is disc-shaped and the other end is annular. The side of the disc-shaped end of the crank 131 is closely attached to the outer side of the eardrum 130. The chuck 132 is also disc-shaped and its size matches the disc-shaped end of the crank 131. The chuck 132 is located in the compression chamber 121 and is closely attached to the inner side of the eardrum 130. The chuck 132 and the disc-shaped end of the crank 131 are connected together by a screw. When the crank 131 moves, it drives the eardrum 130 and the chuck 132 to move together. The annular end of the crank 131 is connected to the power member 133, which drives the crank 131 to move.

[0047] In other embodiments, an annular retaining ring or retaining ring may be used instead of the chuck 132, and the retaining ring or retaining ring matches the disc-shaped end of the crank 131, so that the side surface of the disc-shaped end of the crank 131 is tightly attached to the outer side surface of the eardrum 130; or the outer side surface of the eardrum 130 is tightly attached to the side surface of the disc-shaped end of the crank 131 through various methods such as clipping, screwing, bonding, etc., or a combination of various methods.

[0048] Optionally, the pressurizing component 13 also includes a centrifugal cam 134 and a bearing 135. The power part 133 is a motor. The centrifugal cam 134 is fixed to the output shaft 1331 of the motor. The centrifugal cam 134 has an eccentric small wheel 1341 and an eccentric large wheel 1342. The eccentric small wheel 1341 and the eccentric large wheel 1342 are integrally formed. The eccentric small wheel 1341 is accommodated in the end ring of the crank 131. At the same time, a bearing 135 is sleeved on the outside of the eccentric small wheel 1341. The inner ring of the bearing 135 is fixed on the eccentric small wheel 1341, and the large ring of the bearing 135 is fixed in the end ring of the crank 131. When the motor is working, the motor output shaft 1331 rotates to drive the centrifugal cam 134 to rotate. Since a bearing 135 is provided between the eccentric wheel 1341 and the crank 131, the rotation of the eccentric wheel 1341 will only be converted into a driving force for the crank 131, and will not drive the crank 131 to rotate together. The crank 131 forms a reciprocating piston motion as the eccentric wheel 1341 continues to rotate, thereby driving the eardrum 130 to reciprocate to squeeze or expand the compression chamber 121. In the process of squeezing the compression chamber 121, the gas in the compression chamber 121 is pressurized and discharged into the air outlet chamber 102. In the process of expanding the compression chamber 121, the volume of the compression chamber 121 increases and the air pressure decreases, and the gas in the air intake chamber 101 is introduced into the compression chamber 121; thereby, the intake-pressurization-exhaust process is realized cyclically.

[0049] The eccentric wheel 1342 provides a stable centrifugal force for the crank 131, reducing errors caused by variations in the driving force applied by the motor to the crank 131, and ensuring smooth and constant compression of the gas. It should be noted that the rotation of the eccentric wheel 1342 is consistent with the direction of movement of the crank 131, i.e., the direction of the centrifugal force generated by the eccentric wheel 1342 is consistent with the direction of movement of the crank 131.

[0050] In order to prevent the crank 131, the centrifugal cam 134 and other components from being affected by the outside world, and to increase the integrity of the air pump device 1, a protective shell 136 is provided on the outside of the centrifugal cam 134 and the crank 131. One side of the protective shell 136 is connected to the cover 12. The motor is arranged on the outside of the protective shell 136 to facilitate the heat dissipation of the motor. The motor and the protective shell 136 are connected by a small bearing. A hole is opened on the protective shell 136 for the motor output shaft 1331 to pass through. A small bearing is fixed on the hole wall. The output shaft 1331 of the motor can be rotatably matched with the protective shell 136 through the small bearing.

[0051] Of course, a plurality of ventilation holes are also provided on the protective shell 136 , which connect the interior of the protective shell 136 with the outside world, and are used to dissipate heat for the internal environment of the protective shell 136 .

[0052] The air pump device 1 according to the embodiment of the present invention has the advantage of being able to stably supply air, and at the same time, the air pump has high compression efficiency and high utilization rate of the compressed gas.

[0053] An embodiment of the present invention further provides a water-gas system for an endoscope, which can stably supply air and water to the endoscope 8 .

[0054] refer to Figure 1 and Figure 2 The water and gas system includes a noise reduction and dust reduction device 2, a water supply component 4, a gas delivery component 3 and the above-mentioned air pump device 1. The noise reduction and dust reduction device 2, the air pump device 1 and the gas delivery component 3 are connected in sequence, and the water supply component 4 is connected to the gas delivery component 3. The noise reduction and dust reduction device 2 is used to filter and remove impurities from the air input to the air pump device 1 so that the air pump device 1 can obtain clean air. At the same time, the noise reduction and dust reduction device 2 can also reduce the vibration and noise generated when delivering air. The water supply component 4 is used to supply water to the endoscope 8. The gas delivery component 3 is used to provide the compressed air generated by the air pump device 1 to the endoscope 8 for use, or the gas delivery component 3 is used to provide the compressed air generated by the air pump device 1 to the water supply component 4 to generate sufficient water supply pressure, thereby optimizing the layout of the water and air supply pipes 32.

[0055] The water-gas system also includes a chassis 5, within which the noise and dust reduction device 2 and the air pump device 1 are disposed, to enhance integrity and protect the noise and dust reduction device 2 and the air pump device 1. A ventilation slot 50 is also provided on the wall of the chassis 5 to supply air to the interior of the chassis 5 for use by the air pump device 1.

[0056] Optionally, a sound-absorbing pad 54 is provided inside the chassis 5, disposed beneath the air pump device 1. The pad 54 has a plurality of small holes distributed thereon, and the vent slots 50 on the chassis 5 are connected to the small holes. The sound-absorbing pad 54 not only does not affect the heat dissipation of the air pump device 1, but also absorbs vibrations and noise generated by the air pump device 1, thereby reducing the propagation of noise and providing a relatively quiet operating environment for the doctor.

[0057] refer to Figure 1 、 Figure 3 and Figure 4 In order to further reduce the vibration generated by the air pump device 1 from being transmitted to the chassis 5, a fixing bracket 51 is fixed inside the chassis 5, and a connecting bracket 52 is connected to the air pump device 1. The connecting bracket 52 is connected to the fixing bracket 51, and a buffer member 53 is provided at the connection between the connecting bracket 52 and the fixing bracket 51, thereby reducing the vibration of the air pump device 1 from being transmitted to the chassis 5. At the same time, the connecting bracket 52 and the fixing bracket 51 cooperate to suspend the air pump device 1 inside the chassis 5, so that the air pump device 1 is separated from the chassis 5.

[0058] refer to Figure 9 Combined with Figure 3The buffer member 53 includes a first connecting portion 531, a second connecting portion 532, and a buffer portion 533. The buffer portion 533 is located between the first connecting portion 531 and the second connecting portion 532. The first connecting portion 531 is provided with a first slot 5311, and the second connecting portion 532 is provided with a second slot 5321. The fixing bracket 51 is secured to the first slot 5311, and the connecting bracket 52 is secured to the second slot 5321. The buffer portion 533 can be configured in a conical / funnel shape. The buffer member 53 can be integrally formed of a soft material, thereby dissipating the vibration generated by the air pump device 1 along the inclined surface of the conical / funnel-shaped buffer portion 533, dissipating kinetic energy and reducing noise through friction and shaking deformation.

[0059] refer to Figure 10 and Figure 11 Combined with Figure 1 The noise reduction and dust reduction device 2 is connected to the air pump device 1 through the first air duct 6, and the first air duct 6 is connected to the air inlet chamber 101. The noise reduction and dust reduction device 2 is used to filter the air and provide clean air to the air inlet chamber 101.

[0060] refer to Figures 12 to 14 The noise and dust reduction device 2 includes an air inlet pipe 20, a filter element 21, a filter element mounting shell 22, an air inlet connecting seat 23 and an air outlet connecting seat 24. The filter element 21 is accommodated in the filter element mounting shell 22. The air inlet connecting seat 23 and the air outlet connecting seat 24 are respectively arranged at both ends of the filter element mounting shell 22 and connected to the filter element mounting shell 22. The air inlet pipe 20 is connected to the air inlet connecting seat 23.

[0061] The air inlet connector 23 is provided with an axial blind hole 232 and a lateral hole 233. The lateral hole 233 communicates with the axial blind hole 232. One end of the air inlet pipe 20 is inserted into the axial blind hole 232, and air is input through the air inlet pipe 20 and discharged through the lateral hole 233. Because the filter element mounting housing 22 is connected to the air inlet connector 23, an annular chamber 221 is defined between the filter element 21 and the filter element mounting housing 22. After being discharged from the lateral hole 233, the air enters the annular chamber 221, then passes through the filter element 21 and is discharged from the interior of the filter element 21 to the air outlet connector 24. The air outlet connector 24 has an axial through hole that communicates with the interior of the filter element 21. Air filtered by the filter element 21 enters the axial through hole, then passes through the first air duct 6 and enters the air inlet chamber 101 of the air pump device 1.

[0062] Optionally, the filter element 21 of this embodiment adopts a multi-layer design. The filter element 21 is a cylindrical structure. The filter element 21 includes a pre-filter layer 211, a moisture-proof and antibacterial layer 212, a main filter layer 213 and a noise reduction layer 214 from the outside to the inside. The pre-filter layer 211 can be made of polyester fiber non-woven fabric with a pore size of 20~50μm, which is used to intercept hair, dandruff, large dust particles larger than 5μm in the air; at the same time, a silver ion coating is coated on the pre-filter layer 211. The silver ion coating can inhibit the growth of microorganisms and is conducive to hydrophobicity to reduce condensation water adsorption. The moisture-proof and antibacterial layer 212 is used to adsorb PM2.5 particles and aerosols. The moisture-proof and antibacterial layer 212 can be made of electrostatically charged melt-blown cloth with a pore size of 5~10μm. At the same time, tea tree essential oil microparticles are added to the electrostatically charged melt-blown cloth to achieve a long-lasting antibacterial effect. The main filter layer 213 utilizes PTFE-coated ultrafine glass fibers with a pore size of 0.1-0.3 μm. The hydrophobic surface of the PTFE membrane effectively prevents liquid penetration, and the fiberglass mesh structure extends service life. The noise reduction layer 214 utilizes polyurethane foam with added glass fiber sound-absorbing cotton, with a porosity of 85%-92%, to absorb and reduce noise. The polyurethane foam layer dissipates airflow energy through viscous friction, while the glass fiber sound-absorbing cotton has a porous structure that further absorbs high-frequency noise. Together with the main filter layer 213, it forms a gradient porosity, preventing turbulent regeneration.

[0063] In other embodiments, the filter element 21 can also be designed as a layered, columnar or other structure, and the air input through the air intake pipe 20 can also pass through the pre-filter layer 211, the moisture-proof and antibacterial layer 212, the main filter layer 213 and the noise reduction layer 214 in sequence from front to back, from bottom to top, and from top to bottom, and then reach the first air duct 6 and enter the air intake chamber 101 of the air pump device 1.

[0064] Of course, noise reduction can also be achieved by designing the structure of the intake pipe 20.

[0065] The air inlet end of the air inlet pipe 20 is configured as a conical bell mouth. The conical bell mouth can reduce the air flow velocity at the same air flow rate, thereby reducing turbulence, vortex and air friction, and further reducing noise.

[0066] The diameter of the conical bell mouth's large end is D1, the diameter of its small end is D2, and the distance between the large and small ends is L. The semi-cone angle θ of the conical bell mouth satisfies the relationship tanθ = (D1 − D2) / 2L. Simulations have shown that a semi-cone angle θ within the range of 10–15° effectively reduces noise. However, if the semi-cone angle θ is too small, the length of the intake duct 20 increases, increasing space usage. If the semi-cone angle θ is too large, boundary layer separation of the intake air will occur, increasing pressure loss.

[0067] In order to quickly disassemble the air intake pipe 20 or the first air guide pipe 6 to replace the filter element 21, a quick-release assembly 26 is provided on the air intake connector 23 or the air outlet connector 24 or both the air intake connector 23 and the air outlet connector 24.

[0068] Continue to refer Figure 12 This embodiment is described using the example of a quick-release assembly 26 disposed on one side of the intake connector 23. The quick-release assembly 26 comprises a switch buckle 261, a locking screw 262, a spring 263, and a locking post 264. The switch buckle 261 is inserted into the axial blind hole 232 of the intake connector 23 and sleeved onto the exterior of the intake pipe 20. The switch buckle 261 is threadedly connected to the intake connector 23. A radial through hole 231 is provided in the intake connector 23. The locking post 264, locking screw 262, and spring 263 are all received in the radial through hole 231. The spring 263 is disposed between the locking post 264 and the locking screw 262. The locking screw 262 is threadedly connected to the radial through hole 231 of the intake connector 23. The lower end of the locking post 264 can engage the intake pipe 20 within the axial blind hole 232 to secure the intake pipe 20. The lower end of the lock post 264 has a chamfered surface 2641, and the switch buckle 261 has an end chamfered surface 2611. The end chamfered surface 2611 slidably engages the chamfered surface 2641. When the switch buckle 261 is screwed inward relative to the air intake connector 23, the end chamfered surface 2611 pushes the chamfered surface 2641 to slide, thereby pushing the lock post 264 radially outward of the axial blind hole 232. At this time, the lock post 264 is disengaged from the air intake pipe 20, and the air intake pipe 20 can be easily removed by pulling. When the switch buckle 261 is screwed outward relative to the air intake connector 23, the end chamfered surface 2611 gradually moves away from the chamfered surface 2641. The lock post 264 is pushed radially inward of the axial blind hole 232 by the rebound force of the spring 263, and the lock post 264 is then clamped to the air intake pipe 20. Of course, an airtight member 27 is also provided between the air intake pipe 20 and the air intake connector 23 to ensure sealing.

[0069] Similarly, when the quick-release assembly 26 is applied to the air outlet connecting seat 24, the first air guide tube 6 can be easily removed. Since the principle of the quick-release assembly 26 on the air outlet connecting seat 24 is the same as that on the air inlet connecting seat 23, it will not be repeated here. For details, please refer to the movement process of the quick-release assembly 26 on the air inlet connecting seat 23.

[0070] Optionally, the air intake connector 23 is snap-connected to the filter cartridge mounting housing 22. Specifically, a low step is provided on the outer wall of the air intake connector 23 on one side near the filter cartridge mounting housing 22. The edge of the low step is provided with a circle of latching protrusions. The inner wall of the end of the filter cartridge mounting housing 22 is provided with a circle of wall grooves. The latching protrusions snap into the wall grooves, thereby connecting the air intake connector 23 and the filter cartridge mounting housing 22 together. The outer wall of the low step is provided with multiple protruding latches spaced circumferentially, where "multiple" here means at least two. The filter cartridge mounting housing 22 is provided with multiple latching cavities, and the positions of the multiple latching cavities correspond one-to-one with the multiple latching blocks, so that the latching blocks can be snapped into the latching cavities. The engagement of the latching blocks and the latching cavities prevents circumferential rotation of the air intake connector 23 and the filter cartridge mounting housing 22. The outer wall of the low step is provided with an annular groove along the circumference. A sealing ring is installed in the annular groove, which is sealed with the filter cartridge mounting housing 22, thereby sealing the air intake connector 23 and the filter cartridge mounting housing 22.

[0071] Since the noise and dust reduction device 2 is entirely mounted inside the chassis 5, a quick-release bracket 55 is fixed inside the chassis 5 to facilitate quick assembly and disassembly of the noise and dust reduction device 2 from the chassis 5. A shock-absorbing and anti-slip sleeve 25 is provided on the exterior of the filter element mounting housing 22 and mounted on the quick-release bracket 55. The quick-release bracket 55 has multiple symmetrically arranged arcuate claws that engage the noise and dust reduction device 2. The shock-absorbing and anti-slip sleeve 25 is made of soft rubber, which not only prevents slippage and reduces vibration, but also maintains a close fit on the filter element mounting housing 22.

[0072] refer to Figure 15 and Figure 16 Combined with Figure 1 The gas delivery component 3 is connected to the air pump device 1 through the second air duct 7, and the second air duct 7 is connected to the air outlet chamber 102. The gas delivery component 3 is used to deliver gas to the endoscope 8 or apply water supply pressure to the water supply component 4.

[0073] The gas delivery component 3 includes a pipe connector 30 and an air supply pipe 32. A three-way interface 31 is provided inside the pipe connector 30. The first port of the three-way interface 31 is connected to the air supply pipe 32, the second port of the three-way interface 31 is connected to the second air guide pipe 7, and the third port of the three-way interface 31 is connected to the water supply component 4.

[0074] After the second air duct 7 guides the compressed air generated by the air pump device 1 into the three-way interface 31, the compressed air can enter the front end of the endoscope 8 through the air supply pipe 32 for use. The compressed air can also enter the water supply component 4 through the three-way interface 31 to provide water supply pressure for the water supply component 4. Of course, whether the compressed air delivered by the second air duct 7 enters the air supply pipe 32 or the water supply component 4 can be controlled by the selection button 35, such as Figure 17The selection button 35 is connected to the switching valve 36. The switching valve 36 has two inlets and two outlets. The two inlets are respectively connected to the air supply pipe 32 and the water supply pipe 42 on one side of the pipe connector 30, and the two outlets are respectively connected to the air supply pipe 32 and the water supply pipe 42 on one side of the endoscope 8. When the selection button 35 is pressed, the selection button 35 closes the channel connecting the switching valve 36 to the air supply pipes 32 on both sides. At this time, compressed air enters the water supply component 4 from the third port of the three-way interface 31, presses out the water, and realizes water supply; when the selection button 35 is released, the selection button 35 closes the channel connecting the switching valve 36 to the water supply pipes 42 on both sides. At this time, compressed air enters the air supply pipe 32 from the first port of the three-way interface 31.

[0075] Optionally, the gas delivery assembly 3 also includes a tube shell 33 and a sheath 34. The tube shell 33 is sleeved on the outside of the air supply pipe 32 and the water supply pipe 42 to protect the air supply pipe 32 and the water supply pipe 42. The sheath 34 is arranged at the end connection of the tube shell 33. The sheath 34 is made of hard material to prevent the air supply pipe 32 and the water supply pipe 42 from being bent and damaged during use.

[0076] Reference again Figure 1 The water supply assembly 4 includes a water vapor tank 40, a water vapor pipe 41, a water drawing pipe and a water supply pipe 42. One end of the water vapor pipe 41 is connected to the water vapor tank 40, and the other end of the water vapor pipe 41 is connected to the clamping pipe joint 30. The water vapor pipe 41 is internally provided with a liquid flow channel 411 and an air flow channel 412.

[0077] One end of the liquid flow channel 411 is connected to and communicated with the water supply pipe 42 through a straight-through joint 4111, and the other end of the liquid flow channel 411 is connected to a water drawing pipe. The water drawing pipe is inside the water vapor tank 40, and the lower end of the water drawing pipe is immersed below the liquid level of the water vapor tank 40.

[0078] One end of the air flow channel 412 is connected to and communicates with the third port of the three-way interface 31 through the two-way joint 4121, and the other end of the air flow channel 412 is communicated with the interior of the water vapor tank 40 and is located above the liquid level of the water vapor tank 40.

[0079] When the compressed gas in the second air duct 7 enters the water tank 40 through the air flow channel 412, the air pressure above the liquid level in the water tank 40 increases, thereby pressurizing the liquid through the water suction pipe to the water supply pipe 42, and finally transmitted to the front end of the endoscope 8 for use.

[0080] During clinical operation of the endoscope 8, if the amount of water in the water tank 40 is insufficient, gas will be mixed into the water supply pipe 42, causing the water at one end of the endoscope 8 to flow back to the water tank 40, thereby contaminating the water tank 40. In order to avoid this situation, a check valve 43 is further provided in the liquid flow channel 411. The check valve 43 blocks the water from flowing back to the endoscope 8 side. Figure 18 and Figure 19 .

[0081] Optionally, in order to enhance the sealing of the connection between the water supply pipe 42 and the air supply pipe 32, a sealing end head 44 is also connected to the end of the water and air pipe 41. The sealing end head 44 is threadedly connected to the two-way joint 4121 and the straight joint 4111, and a sealing ring is provided at the connection to ensure the stability and sealing of the connection.

[0082] The water-gas system of the embodiment of the present invention has at least the following beneficial effects: (1) The layout of the 42 air and water supply pipes has been optimized, and compressed air can be used to supply water, which simplifies the pipeline layout, reduces maintenance costs, and makes switching between air and water supply operations very convenient.

[0083] (2) The air pump device 1 improves the stability of air supply, improves the efficiency of compressed gas use, and improves the compression efficiency and service life of the device through piston compression.

[0084] (3) The air pump device 1 is suspended from the chassis 5 and is provided with a buffer 53, which significantly reduces the noise and vibration generated by the air pump device 1 during operation.

[0085] (4) The noise reduction and dust reduction device 2 significantly reduces noise, and at the same time filters the air, thereby improving the cleanliness of the compressed air.

[0086] (5) A check valve 43 is provided on the water supply passage to effectively prevent the gas and liquid from flowing back to the water gas tank 40.

[0087] (6) The water-gas system has good sealing performance and effectively protects the water supply pipe 42 and the gas supply pipe 32.

[0088] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An air pump device (1), characterized in that: include: A first gas chamber shell (10); a second gas silo shell (11), the second gas silo shell (11) being sealedly connected to the first gas silo shell (10), the first gas silo shell (10) and the second gas silo shell (11) forming an air inlet chamber (101) and an air outlet chamber (102), the air inlet chamber (101) being isolated from the air outlet chamber (102), and an air inlet valve member (111) and an air outlet valve member (112) being further mounted on the second gas silo shell (11); a cover (12), the cover (12) being sealedly connected to the second gas storage shell (11), the cover (12) and the second gas storage shell (11) forming a compression chamber (121), the air inlet valve member (111) being capable of connecting or closing the air inlet chamber (101) and the compression chamber (121), the air outlet valve member (112) being capable of connecting or closing the air outlet chamber (102) and the compression chamber (121), the air inlet valve member (111) being used to introduce gas from the air inlet chamber (101) into the compression chamber (121), and the air outlet valve member (112) being used to introduce gas from the compression chamber (121) into the air outlet chamber (102); A pressurizing component (13) is used to apply a constant pressure to the gas in the compression chamber (121).

2. The air pump device according to claim 1, characterized in that The pressurizing component (13) includes a pusher and an eardrum (130), wherein the eardrum (130) is sealedly connected to the cover (12), and the eardrum (130), the cover (12) and the second air chamber shell (11) together form the compression chamber (121). The pusher is connected to the eardrum (130), and the pusher can push the eardrum (130) to move so as to change the volume of the compression chamber (121).

3. The air pump device according to claim 2, characterized in that The pushing member includes a crank (131) and a power member (133), one end of the crank (131) is fixedly connected to the eardrum (130), and the other end of the crank (131) is movably connected to the power member (133), and the power member (133) is used to push the crank (131) to move so as to drive the eardrum (130) to move; The pressurizing assembly (13) further includes a centrifugal cam (134) and a bearing (135); the power member (133) is a motor; the centrifugal cam (134) is fixed to the output shaft (1331) of the motor; one end of the crank (131) is arranged outside the centrifugal cam (134) and is connected via the bearing (135); when the motor drives the centrifugal cam (134), the centrifugal cam (134) pushes the crank (131) to move, and the direction of the centrifugal force generated by the centrifugal cam (134) is consistent with the direction of movement of the crank (131).

4. The air pump device according to any one of claims 1 to 3, characterized in that: An air inlet hole (113) and an air outlet hole (114) are provided on the second air storage shell (11), wherein the air inlet hole (113) connects the air inlet chamber (101) and the compression chamber (121), and the air outlet hole (114) connects the air outlet chamber (102) and the compression chamber (121); the air inlet valve member (111) can close or open the air inlet hole (113), and the air outlet valve member (112) can close or open the air outlet hole (114).

5. A water-gas system for an endoscope, characterized in that: include: A noise reduction and dust reduction device (2), a water supply component (4), a gas delivery component (3), and an air pump device (1) according to any one of claims 1 to 4, wherein the noise reduction and dust reduction device (2), the air pump device (1) and the gas delivery component (3) are connected in sequence, and the water supply component (4) is connected to the gas delivery component (3).

6. The water gas system of the endoscope according to claim 5, characterized in that: The water-gas system further comprises a chassis (5), the noise and dust reduction device (2) and the air pump device (1) are both arranged inside the chassis (5), and a ventilation groove (50) is further provided on the wall of the chassis (5); The water-gas system further comprises a fixing bracket (51) and a connecting bracket (52), wherein the fixing bracket (51) is connected to the chassis (5), and the connecting bracket (52) is connected to the air pump device (1). The connecting bracket (52) is connected to the fixing bracket (51) so that the air pump device (1) is spaced apart from the chassis (5), and a buffer member (53) is provided at the connection between the connecting bracket (52) and the fixing bracket (51).

7. The water gas system of the endoscope according to claim 6, characterized in that: The buffer component (53) comprises a first connecting portion (531), a second connecting portion (532) and a buffer portion (533), wherein the buffer portion (533) is located between the first connecting portion (531) and the second connecting portion (532); The first connecting portion (531) is provided with a first card slot (5311), the second connecting portion (532) is provided with a second card slot (5321), the fixing bracket (51) is clamped in the first card slot (5311), and the connecting bracket (52) is clamped in the second card slot (5321).

8. The water gas system of the endoscope according to claim 5, characterized in that: The noise and dust reduction device (2) is connected to the air pump device (1) via a first air duct (6), and the first air duct (6) is in communication with the air inlet chamber (101). The noise and dust reduction device (2) is used to filter air and provide clean air to the air inlet chamber (101).

9. The water gas system of the endoscope according to claim 8, characterized in that: The noise and dust reduction device (2) comprises an air inlet pipe (20), a filter element (21), a filter element mounting shell (22), an air inlet connecting seat (23) and an air outlet connecting seat (24); the filter element (21) is accommodated in the filter element mounting shell (22); the air inlet connecting seat (23) and the air outlet connecting seat (24) are respectively arranged at two ends of the filter element mounting shell (22) and connected to the filter element mounting shell (22); the air inlet pipe (20) is connected to the air inlet connecting seat (23); the air input by the air inlet pipe (20) can enter the filter element (21) through the air inlet connecting seat (23); and the air filtered by the filter element (21) can be discharged through the air outlet connecting seat (24).

10. The water gas system of the endoscope according to claim 9, characterized in that: The filter element (21) comprises a pre-filtration layer (211), a moisture-proof and antibacterial layer (212), a main filtration layer (213), and a noise reduction layer (214).

11. The water gas system of the endoscope according to claim 9, characterized in that: The outer sleeve of the filter element mounting shell (22) is provided with a shock-absorbing and anti-slip sleeve (25); The water-gas system further comprises a chassis (5), a quick-install bracket (55) being fixed inside the chassis (5), and the shock-absorbing anti-slip sleeve (25) being mounted on the quick-install bracket (55).

12. The water gas system of the endoscope according to claim 9, characterized in that: The air inlet end of the air inlet pipe (20) is a conical bell mouth, the diameter of the large diameter end of the conical bell mouth is D1, the diameter of the small diameter end of the conical bell mouth is D2, the distance between the large diameter end and the small diameter end is L, and the semi-cone angle value θ of the conical bell mouth satisfies the relationship tanθ=(D1−D2) / 2L, 10°≤θ≤15°.

13. The water gas system of the endoscope according to claim 9, characterized in that: The noise and dust reduction device (2) further comprises a quick-release assembly (26), wherein the quick-release assembly (26) is arranged on the air inlet connection seat (23), and / or the quick-release assembly (26) is arranged on the air outlet connection seat (24).

14. The water gas system of the endoscope according to claim 13, characterized in that: The quick-release assembly (26) includes a switch buckle (261), a locking screw (262), a spring (263) and a locking column (264); the switch buckle (261) is threadedly connected to the air intake connection seat (23) and the switch buckle (261) is sleeved on the outside of the air intake pipe (20); The lock column (264) has an oblique surface (2641), and the switch buckle (261) has an end oblique surface (2611), and the end oblique surface (2611) is slidably matched with the oblique surface (2641); The air intake connection seat (23) is provided with a radial through hole (231), the locking column (264), the locking screw (262) and the spring (263) are all accommodated in the radial through hole (231), the spring (263) is arranged between the locking column (264) and the locking screw (262), the locking screw (262) is threadedly connected to the air intake connection seat (23), and the locking column (264) is movably connected to the air intake pipe (20) to clamp or detach the air intake pipe (20).

15. The water gas system of an endoscope according to any one of claims 5 to 14, characterized in that: The gas delivery component (3) is connected to the air pump device (1) via a second air guide tube (7), and the second air guide tube (7) is communicated with the air outlet chamber (102). The gas delivery component (3) is used to deliver gas to the endoscope (8) or to apply water supply pressure to the water supply component (4).

16. The water gas system of the endoscope according to claim 15, characterized in that: The gas delivery assembly (3) comprises a pipe joint (30) and a gas supply pipe (32); a three-way interface (31) is provided inside the pipe joint (30); a first port of the three-way interface (31) is connected to the gas supply pipe (32); a second port of the three-way interface (31) is connected to the second gas guide pipe (7); and a third port of the three-way interface (31) is connected to the water supply assembly (4).

17. The water gas system of the endoscope according to claim 16, characterized in that: The water supply assembly (4) comprises a water-air pipe (41) and a check valve (43); a liquid flow channel (411) and an air flow channel (412) are arranged in the water-air pipe (41); and the check valve (43) is arranged in the liquid flow channel (411).

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