Repeatable medical endoscope vent valve structure

Abstract

The invention provides a repetitive medical endoscope vent valve structure which comprises a handle shell, a sealing shell, a sealing piece, a valve element located in the sealing shell, an elastic piece and a first sealing ring, the valve element, the elastic piece and the first sealing ring form a ventilation system, and the sealing piece, the handle shell and the sealing shell are all in a sealed state. And a multi-layer sealing system is formed by matching with a seal in a ventilation system. The ventilation system can realize repeated ventilation control, and the stability and reliability of the electron mirror are improved; a multi-layer sealing system ensures excellent sealing performance, and liquid bacteria and the like are prevented from permeating; meanwhile, a rotating system can be arranged, the sealing shell rotates relative to the sealing piece, the second sealing ring is extruded during rotation, and the sealing performance in the cleaning process and the using process is improved through sealing of the rotating system; and finally, the modular design ensures simple assembly and convenient maintenance.

Description

Technical Field

[0001] This invention belongs to the field of ventilation valve technology, and specifically relates to a ventilation valve structure for a repetitive medical endoscope. Background Technology

[0002] The use of reusable medical endoscopes is becoming increasingly widespread in medical diagnosis and treatment. To ensure that medical waste does not contaminate the handle during use, that there is no leakage of liquid during cleaning, that the internal pressure difference of the handle remains stable during sterilization, and that internal sterilization is thorough, a precise, airtight vent valve is needed to control gas flow. Furthermore, the handle has limited space and a complex internal structure, therefore the vent valve needs to have a rotation function. Existing vent valves may have insufficient sealing performance, imprecise airflow control, or incomplete sealing, which could affect the product's sterility, the performance of the electronic endoscope, and its lifespan. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a repetitive medical endoscope ventilation valve structure, which has excellent sealing performance, precise ventilation control capability and rotation adjustment function.

[0004] Technical solution: To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0005] A reusable medical endoscope ventilation valve structure includes a handle housing, a sealing housing, a sealing element, and a valve core, an elastic element, and a first sealing ring located inside the sealing housing. The sealing housing passes through the side wall of the handle housing, with one end located inside the handle housing and the other end located outside the handle housing. The sealing element is fitted on the surface of the sealing housing and located inside the handle housing. The sealing element is in a sealed state with both the handle housing and the sealing housing, which can prevent external media from entering the interior of the handle housing from the contact area between the handle housing and the sealing housing. The sealing housing has a hollow structure with openings at both ends. The outer wall of the valve core has an annular protrusion, and there is a gap between it and the inner wall of the sealing housing. The first sealing ring is fitted on the outer wall of the valve core and is adjacent to the side wall of the annular protrusion. The elastic element can apply an elastic force to the valve core, so that the side wall of the annular protrusion and the inner wall of one end of the sealing housing compress the first sealing ring to form a seal. It can also retract and release the seal under the action of external force. The sealing housing can rotate relative to the handle housing and the sealing element.

[0006] As a specific implementation, the structure further includes a second sealing ring, which is located between the inner wall of the sealing element and the outer wall of the sealing housing; preferably, the second sealing ring is selected from O-rings.

[0007] As a further preferred embodiment, the outer wall of the sealing housing is provided with an annular groove, and the second sealing ring is disposed in the annular groove, the depth of which is less than the cross-sectional diameter of the second sealing ring.

[0008] As a specific implementation, the structure also includes a lever, which is fixedly connected to the sealing housing and located outside the handle housing. The lever can drive the sealing housing to rotate relative to the handle housing and the seal.

[0009] As a further embodiment, the structure also includes a bearing located between the inner wall of the seal and the outer wall of the sealing housing. The outer ring of the bearing is fixedly connected to the seal 3, while the inner ring can rotate with the sealing housing.

[0010] In a specific implementation, the structure further includes a rotating wheel located inside the handle housing, which is fitted onto the outer wall of the sealing housing and the sealing element, and is fixedly connected to the sealing housing. The rotating wheel is used to connect a steel wire rope, and during use, rotation allows the serpentine tip of the catheter to bend and move within the human body.

[0011] As a specific implementation scheme, the first sealing ring is selected from O-rings.

[0012] In a specific implementation, in the sealed housing, the end located inside the handle housing is called the inner end, and the end located outside the handle housing is called the outer end. One end of the elastic element contacts the inner wall of the inner end of the sealed housing, and the other end contacts the end face of the valve core or the side wall of the annular protrusion, applying an elastic force to the valve core. One end of the valve core is inserted into the opening at the outer end of the sealed housing, through which an external force can be applied to the valve core. Preferably, the elastic element is selected from a spring.

[0013] As a further improvement, the structure also includes a perforated rod inserted from the inner end of the sealing housing. One end of the elastic element contacts the insertion end of the perforated rod, and the other end contacts the end face of the valve core or the side wall of the annular protrusion, thereby applying an elastic force to the valve core.

[0014] As a preferred embodiment of the above improvements, the perforated rod is a perforated screw, which can adjust the depth of insertion into the sealing housing through the thread; preferably, the structure also includes a screw washer, which is used in conjunction with the perforated screw.

[0015] As an embodiment of the above-mentioned improvement, the structure further includes a rotating wheel located inside the handle housing, which is fitted onto the outer wall of the sealing housing and the seal, and is fixedly connected to the sealing housing via a perforated rod.

[0016] As a specific implementation, the seal is connected and sealed to the handle housing with adhesive or with a sealing gasket.

[0017] As a specific implementation, the structure also includes a fixing pin, which is disposed on the outer wall of the sealing housing and close to the end located outside the handle housing. The fixing pin is not connected to the hollow structure of the sealing housing.

[0018] As a specific implementation, the structure also includes an eto valve, which has a protruding structure inside. The eto valve is used to fit over the end of the sealing housing located outside the handle housing, and the protruding structure can compress the valve core.

[0019] Furthermore, the outer wall of the eto valve is provided with an inverted L-shaped groove, and a fixing pin is provided on the outer wall of one end of the sealing housing located outside the handle housing. The L-shaped groove is used to provide a track for the movement of the fixing pin relative to the eto valve and to fix its position when the sealing housing rotates and the protruding structure presses the valve core downward.

[0020] The present invention also provides a reusable medical endoscope, the reusable medical endoscope including the above-described ventilation valve structure.

[0021] The vent valve structure of this invention has the following characteristics:

[0022] 1) Ventilation structure: The valve core, elastic element and first sealing ring inside the sealed housing constitute the ventilation system. This design can be used to achieve precise ventilation control. The ventilation action is the effectiveness of ventilation. The sealing element is in a sealed state with both the handle housing and the sealed housing. It cooperates with the seal in the ventilation system to form a multi-layer sealing system to ensure sealing when ventilation is not required.

[0023] 2) Rotation system sealing: By setting a second sealing ring between the inner wall of the sealing element and the outer wall of the sealing housing, and the sealing housing being able to rotate relative to the sealing element, a rotation system is formed. When rotating, the second sealing ring is squeezed, which can achieve precise control and sealing of the rotating mechanism.

[0024] 3) Modular design: The valve structure adopts a modular design, which facilitates maintenance and replacement of parts.

[0025] Technical benefits: Compared with the prior art, the ventilation valve structure of this invention can achieve repeatable ventilation control, improving the stability and reliability of the electron microscope; the multi-layer sealing system ensures excellent sealing performance and prevents liquid bacteria from seeping in; the rotating system seal improves the sealing performance during cleaning and use; the modular design ensures simple assembly and convenient maintenance. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the internal structure of the vent valve structure and the ETO valve structure of the present invention.

[0027] Figure 2 This is an exploded view of the vent valve structure of the present invention.

[0028] Figure 3 This is an external structural diagram of the vent valve structure of the present invention (without handle and housing).

[0029] Figure 4 This is a schematic diagram of the ventilation principle of the ventilation valve structure of the present invention.

[0030] Among them, 1-handle housing, 2-sealing housing, 3-seal, 4-valve core, 401-annular protrusion, 5-elastic element, 6-first sealing ring, 7-second sealing ring, 8-lever, 9-bearing, 10-wheel, 11-rod with hole, 12-screw washer, 13-fixing pin, 14-eto valve, 1401-protrusion structure, 1402-inverted L-shaped groove. Detailed Implementation

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent.

[0033] Example 1

[0034] A reusable medical endoscope ventilation valve structure, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a handle housing 1, a sealing housing 2, a seal 3, a valve core 4, an elastic element 5 and a first sealing ring 6 located inside the sealing housing 2, as well as a second sealing ring 7, a lever 8, a bearing 9, a rotating wheel 10, a perforated rod 11, a screw washer 12, a fixing pin 13 and an ETO valve 14.

[0035] The sealing housing 2 passes through the side wall of the handle housing 1, with one end located inside the handle housing 1 and the other end located outside the handle housing 1. The sealing element 3 is fitted onto the surface of the sealing housing 2 and located inside the handle housing 1. The sealing element 3 is in a sealing state with both the handle housing 1 and the sealing housing 2, which can prevent external media from entering the interior of the handle housing 1 from the contact area between the handle housing 1 and the sealing housing 2. The sealing housing 2 has a hollow structure with openings at both ends. The outer wall of the valve core 4 has an annular protrusion 401, and there is a gap between it and the inner wall of the sealing housing 2. The first sealing ring 6 is fitted onto the outer wall of the valve core 4 and is adjacent to the side wall of the annular protrusion 401. The elastic element 5 can apply an elastic force to the valve core 4, so that the side wall of the annular protrusion 401 and the inner wall of one end of the sealing housing 2 compress the first sealing ring 6 to form a seal, and can retract and release the seal under the action of external force. The sealing housing 2 can rotate relative to the handle housing 1 and the sealing element 3.

[0036] As a specific design, in the sealing housing 2, the end inside the handle housing 1 is called the inner end, and the end outside the handle housing 1 is called the outer end. The perforated rod 11 is inserted from the inner end of the sealing housing 2. One end of the elastic element 5 contacts the inserted end of the perforated rod 11, and the other end contacts the end face of the valve core 4 or the side wall of the annular protrusion 401, applying an elastic force to the valve core 4. This causes the side wall of the annular protrusion 401 and the inner wall of the outer end of the sealing housing 2 to press against the first sealing ring 6, forming a seal. Furthermore, one end of the valve core 4 is inserted into the opening at the outer end of the sealing housing 2, through which an external force can be applied to the valve core. The elastic element 5 is selected from springs.

[0037] As a preferred embodiment, the perforated rod 11 is a perforated screw, which can adjust the depth of insertion into the sealing housing 2 via the thread; the screw washer 12 is used in conjunction with the perforated screw. The first sealing ring 6 is selected from O-rings.

[0038] As a specific solution, for the sealing of the seal 3 and the handle housing 1, the seal 3 and the handle housing 1 are connected and sealed with adhesive, or sealed with a gasket, etc.

[0039] As a specific solution, for the sealing of the seal 3 and the sealing housing 2, the second sealing ring 7 is located between the inner wall of the seal 3 and the outer wall of the sealing housing 2; the lever 8 is fixedly connected to the sealing housing 2 and located outside the handle housing 1. The lever 8 can drive the sealing housing 2 to rotate relative to the handle housing 1 and the seal 3, while squeezing the second sealing ring 7 to improve the sealing effect; the bearing 9 is located between the inner wall of the seal 3 and the outer wall of the sealing housing 2. The outer ring of the bearing 9 is fixedly connected to the seal 3, while the inner ring can rotate with the sealing housing 2; the rotating wheel 10 is located inside the handle housing 1, fitted onto the outer walls of the sealing housing 2 and the seal 3, and is fixedly connected to the sealing housing 2 through the perforated rod 11. The rotating wheel 10 is used to connect the steel wire rope, and during use, rotation can cause the snake-like structure at the front end of the catheter to bend and move within the human body.

[0040] As a preferred embodiment, the outer wall of the sealing housing 2 is provided with an annular groove, and the second sealing ring 7 is disposed in the annular groove, wherein the depth of the annular groove is less than the cross-sectional diameter of the second sealing ring 7. The second sealing ring 7 is selected from O-rings;

[0041] The fixing pin 13 is set on the outer wall of the sealing housing 2 and is close to the end located outside the handle housing 1. The fixing pin 13 is not connected to the hollow structure of the sealing housing 2.

[0042] The eto valve 14 has a raised structure 1401 inside and an inverted L-shaped groove 1402 on its outer wall. The eto valve 14 is used to fit over the end of the sealing housing 2 located outside the handle housing 1. The raised structure 1401 can compress the valve core 4. The L-shaped groove 1402 provides a track for the movement of the fixing pin 13 relative to the eto valve 14 and fixes its position when the sealing housing 2 rotates and the raised structure 1401 compresses the valve core 4 downward.

[0043] The above-mentioned ventilation valve structure can be applied to reusable medical endoscopes.

[0044] The sealing principle of the device of the present invention is as follows: Figure 4 As shown in the diagram, points A and B are key sealing points. At point A, the first sealing ring 6 uses the compressive force provided by the elastic element 5 to seal, while at point B, the second sealing ring 7 is used for compression and deformation sealing. When the ETO valve 14 is screwed in, the valve core 4 is pressed down, causing the first sealing ring 6 to move down and release the seal. ETO gas enters from point C and flows out from point D to sterilize the inside of the handle. In order to allow smooth airflow, the first sealing ring 6 needs to be interference-fitted onto the valve core 4, but the size after fitting must be smaller than the inner diameter of the sealing housing 2 to allow free movement.

[0045] In actual use, without the ETO valve, the structure is in a sealed state, ensuring no water or air leakage during cleaning and use, preventing liquid from entering and damaging internal components during disinfection and daily use. When the rotating system is in use, rotating the lever 8 drives the rotating wheel 10, which in turn drives the steel wire rope. The serpentine shape of the guide tube tip moves within the body. Simultaneously, as the sealing housing 2 rotates, the sealing housing 2 and the sealing element 3 can simultaneously compress the second sealing ring 7, ensuring a tight seal while rotating.

[0046] Specifically, in the above-described apparatus of the present invention:

[0047] I. Material Selection

[0048] ①The four components, namely the sealing housing 2, sealing element 3, fixing pin 13, and valve core 4, are all made of stainless steel, which is smooth and not easily deformed, and has good sealing performance.

[0049] ②The six components, namely elastic element 5, bearing 9, screw with hole 11, screw washer 12, first sealing ring 6, and second sealing ring 7, are all finished products purchased directly, saving costs by using a large amount of readily available materials.

[0050] ③The four components, namely the rotary wheel 10, lever 8, eto valve 14, and handle housing 1, are injection molded parts. Since they need to be used in conjunction with the product design and have a relatively complex structure, it is more appropriate to choose injection molded parts.

[0051] II. Assembly Dimensions and Operating Procedures for Key Components

[0052] ① The seal 3 and the sealing housing 2 are connected and rotated by a bearing 9. Therefore, the assembly with the bearing 9 is always a tight fit, which is beneficial to the reliability of rotation. The seal between the seal 3 and the sealing housing 1 is achieved by the compression deformation of the second sealing ring 7. Since silicone has good elasticity and corrosion resistance, an interference fit is used, which does not affect the rotation of the sealing housing 2 and can also provide a good seal.

[0053] ② Sufficient clearance must be left between the valve core 4 and the sealing housing 2 to allow enough space for gas to pass through. However, attention must also be paid to size control. Since the first sealing ring 6 needs to seal both the valve core 4 and the sealing housing 2, it needs to be interference-fitted when it is fitted onto the valve core 4. However, after fitting, the size must be smaller than the inner diameter of the sealing housing 2 to allow free movement.

[0054] ③ The sealing element 3 and the rotating wheel 10 are locked onto the sealing housing 2 by a screw with holes 11 and a screw washer 12. The sealing housing 3 has internal threads with a relatively deep thread depth. The degree of compression deformation of the first sealing ring 6 can be adjusted by adjusting the length of the screw with holes 11 or the length of the elastic element 5.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reusable medical endoscope ventilation valve structure, characterized in that, The device includes a handle housing (1), a sealing housing (2), a sealing element (3), and a valve core (4), an elastic element (5), and a first sealing ring (6) located inside the sealing housing (2). The sealing housing (2) passes through the side wall of the handle housing (1), with one end located inside the handle housing (1) and the other end located outside the handle housing (1). The sealing element (3) is fitted onto the surface of the sealing housing (2) and located inside the handle housing (1). The sealing element (3) is in a sealed state with both the handle housing (1) and the sealing housing (2). The sealing housing (2) has a hollow structure with both ends... The valve core (4) has an opening, and the outer wall of the valve core (4) has an annular protrusion (401) with a gap between it and the inner wall of the sealing housing (2). The first sealing ring (6) is fitted on the outer wall of the valve core (4) and is adjacent to the side wall of the annular protrusion (401). The elastic element (5) can apply elastic force to the valve core (4), so that the side wall of the annular protrusion (401) and the inner wall of one end of the sealing housing (2) squeeze the first sealing ring (6) to form a seal. It can also retract and release the seal under the action of external force. The sealing housing (2) can rotate relative to the handle housing (1) and the sealing element (3).

2. The reusable medical endoscope ventilation valve structure according to claim 1, characterized in that, The structure further includes a second sealing ring (7), which is located between the inner wall of the sealing element (3) and the outer wall of the sealing housing (2); preferably, the second sealing ring (7) is selected from an O-ring; preferably, the outer wall of the sealing housing (2) is provided with an annular groove, and the second sealing ring (7) is disposed in the annular groove, the depth of the annular groove being less than the cross-sectional diameter of the second sealing ring (7).

3. The reusable medical endoscope ventilation valve structure according to claim 1, characterized in that, The structure further includes a lever (8), which is fixedly connected to the sealing housing (2) and located outside the handle housing (1). The lever (8) can drive the sealing housing (2) to rotate relative to the handle housing (1) and the seal (3). Preferably, the structure further includes a bearing (9), which is located between the inner wall of the seal (3) and the outer wall of the sealing housing (2). The outer ring of the bearing (9) is fixedly connected to the seal (3), and the inner ring can rotate with the sealing housing (2). Preferably, the structure further includes a rotating wheel (10), which is located inside the handle housing (1), and is fitted around the outer wall of the sealing housing (2) and the seal (3), and is fixedly connected to the sealing housing (2).

4. The reusable medical endoscope ventilation valve structure according to claim 1, characterized in that, The first sealing ring (6) is selected from O-rings.

5. The reusable medical endoscope ventilation valve structure according to claim 1, characterized in that, In the sealed housing (2), the end located inside the handle housing (1) is called the inner end, and the end located outside the handle housing (1) is called the outer end. One end of the elastic element (5) contacts the inner wall of the inner end of the sealed housing (2), and the other end contacts the end face of the valve core (4) or the side wall of the annular protrusion (401), applying an elastic force to the valve core (4), and one end of the valve core (4) is inserted into the opening at the outer end of the sealed housing (2); preferably, the elastic element (5) is selected from a spring.

6. The reusable medical endoscope ventilation valve structure according to claim 5, characterized in that, The structure also includes a perforated rod (11), which is inserted into the inner end of the sealing housing (2). One end of the elastic element (5) contacts the insertion end of the perforated rod (11), and the other end contacts the end face of the valve core (4) or the side wall of the annular protrusion (401), applying an elastic force to the valve core (4). Preferably, the perforated rod (11) is a perforated screw, which can adjust the depth of insertion into the sealing housing (2) by means of the thread. Preferably, the structure also includes a screw washer (12), which is used in conjunction with the perforated screw. Preferably, the structure also includes a rotating wheel (10), which is located inside the handle housing (1) and is fitted onto the outer wall of the sealing housing (2) and the sealing element (3), and is fixedly connected to the sealing housing (2) by means of the perforated rod (11).

7. The reusable medical endoscope ventilation valve structure according to claim 1, characterized in that, The seal (3) is connected and sealed to the handle housing (1) by adhesive or by using a sealing gasket.

8. The reusable medical endoscope ventilation valve structure according to claim 1, characterized in that, The structure also includes a fixing pin (13), which is disposed on the outer wall of the sealing housing (2) and close to one end located outside the handle housing (1). The fixing pin (13) is not connected to the hollow structure of the sealing housing (2).

9. The reusable medical endoscope ventilation valve structure according to claim 1, characterized in that, The structure also includes an eto valve (14), which has a protruding structure (1401) inside. The eto valve (14) is used to fit on one end of the sealing housing (2) located outside the handle housing (1). The protruding structure (1401) can squeeze the valve core (4). Preferably, the outer wall of the eto valve (14) is provided with an inverted L-shaped groove (1402). A fixing pin (13) is provided on the outer wall of the end of the sealing housing (2) located outside the handle housing (1). The L-shaped groove (1402) provides a track for the movement of the fixing pin relative to the eto valve (14) and fixes its position when the sealing housing (2) rotates and the protruding structure (1401) squeezes the valve core (4) downward.

10. A reusable medical endoscope, characterized in that, The reusable medical endoscope includes the ventilation valve structure as described in any one of claims 1-9.

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