Negative pressure control valve and corresponding endoscope

Abstract

The present invention relates to a negative pressure control valve, comprising a hollow valve body, a first interface and a second interface being arranged on the side wall; a valve core being movably installed in the inner cavity of the hollow valve body, the valve core comprising a first matching port matching the first interface, a second matching port matching the second interface, and a channel connecting the first matching port and the second matching port, the valve core being provided with a first stopper matching the first interface and a second stopper matching the second interface; the negative pressure control valve is arranged to have a closed state and a through state, in the closed state, the first interface corresponds to the first stopper, and the second interface corresponds to the second stopper, so that the first interface and the second interface are not connected; in the through state, the first interface corresponds to the first matching port, and the second interface corresponds to the second matching port, so that the first interface and the second interface are connected.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a negative pressure control valve and a corresponding endoscope. Background Art

[0002] With the development of society and the improvement of people's lives, as well as the improvement of health care awareness, people's awareness of endoscopic examinations and census has been continuously improved. Therefore, endoscopic examination has become an important medical device in clinical medicine. Endoscopic examination and treatment have become more and more mature since their clinical use in my country. In addition to use and inspection, cleaning and disinfection after each use of the product is also an important work content that cannot be ignored. Avoiding cross infection caused by improper cleaning and disinfection is also an important part of the maintenance of endoscopes. However, since the endoscope is a sophisticated and complex product depending on the part of use, although the design takes into account the convenience of use and operation, it is also necessary to avoid being too complicated to fully achieve the functions of cleaning and disinfection. Therefore, the selection of materials and the design of the structure have been carefully considered.

[0003] The main products of endoscopes at present include nasopharyngeal endoscopes, bronchoscopes, choledochoscopes, pyeloscopes, cystoscopes, digestive tract endoscopes, thoracoscopes, etc. All endoscope products are equipped with image display, insertion part, bending angle, sampling and treatment working channels. In order to keep the image clear, they need to have water supply, air supply and suction channels for cleaning the mirror surface.

[0004] During the inspection and diagnosis of endoscopes, maintaining clear observation of images and removing mucous membranes, blood, and liquids that affect the observation of images are all important functions that need to be achieved through suction. Therefore, it is very important to clean and disinfect the pipes of the endoscope after use, especially to reuse the suction button after cleaning and disinfection. It is necessary to avoid stains left in the wall to cause cross infection. Of course, some endoscopes do not need suction function and do not have suction button components.

[0005] Taking into account the factors of avoiding cross infection caused by improper cleaning and disinfection of the suction button and clinically acceptable costs, it is an important factor of this invention to fully avoid the occurrence of such risks in advance during product design and to prevent risky products from being put on the market from the source. Summary of the invention

[0006] The main purpose of the present invention is to provide a disposable negative pressure control valve and a corresponding endoscope in order to solve the above problems.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the negative pressure control valve adopted by the present invention is as follows: comprising:

[0008] A hollow valve body, wherein a first interface and a second interface are arranged on a side wall of the hollow valve body;

[0009] The valve core is movably installed in the inner cavity of the hollow valve body, the valve core comprises a first matching port matching the first interface, a second matching port matching the second interface, and a channel connecting the first matching port and the second matching port, and the valve core is provided with a first stopper matching the first interface and a second stopper matching the second interface;

[0010] The negative pressure control valve is configured to have a closed state and a through state. In the closed state, the first interface corresponds to the first stop block, and the second interface corresponds to the second stop block, so that the first interface and the second interface are not connected; by operating the first end of the valve core to move the valve core relative to the hollow valve body, the negative pressure control valve is switched to a through state. In the through state, the first interface corresponds to the first matching port, and the second interface corresponds to the second matching port, so that the first interface and the second interface are connected.

[0011] Preferably, the negative pressure control valve includes a button, which is arranged at the first end of the hollow valve body and connected to the first end of the valve core. An elastic member is arranged between the button and the first end of the hollow valve body. Due to the elastic force of the elastic member, the negative pressure control valve remains in a closed state when the button is not operated. By pressing the button, the valve core is moved relative to the hollow valve body, switching the negative pressure control valve to a through state.

[0012] Preferably, the button is provided with a first sealing bevel, and the first end of the hollow valve body is provided with a first matching bevel matching with the first sealing bevel. When the negative pressure control valve is in a through state, the first sealing bevel contacts with the first matching bevel, so that the button is sealed with the first end of the hollow valve body.

[0013] Preferably, a third stopper is disposed at the first end of the valve core, and the third stopper is an annular stopper, and the outer diameter of the third stopper matches the inner diameter of the first end of the hollow valve body.

[0014] Preferably, the first stopper has an extension portion, the extension portion is provided with at least one protrusion, the inner cavity of the hollow valve body is provided with a guide groove matching the protrusion, the protrusion moves along the guide groove, and when the button is not operated, the protrusion is limited to the end wall of the guide groove by the elastic force of the elastic member, so that the negative pressure control valve remains in a closed state.

[0015] Preferably, the second stop block is arranged at the second end of the valve core, the first stop block is arranged between the first end of the valve core and the second stop block, a second matching port is arranged between the first stop block and the second stop block, and a first matching port is arranged between the first end of the valve core and the first stop block.

[0016] Preferably, the first stopper and the second stopper are both annular stops, the outer diameter of the second stopper is set to be larger than the outer diameter of the first stopper, the second stopper is provided with a second sealing bevel, and the inner cavity of the hollow valve body is provided with a second matching bevel that matches the second sealing bevel. When the negative pressure control valve is in a closed state, the second sealing bevel contacts the second matching bevel, so that the second end of the valve core is sealed with the hollow valve body.

[0017] Preferably, the negative pressure control valve comprises a valve seat, and the valve seat is arranged at the second end of the hollow valve body.

[0018] Preferably, the negative pressure control valve comprises a base, and the base is arranged between the valve seat and the second end of the hollow valve body to seal and connect the valve seat and the second end of the hollow valve body.

[0019] The present invention provides an endoscope, wherein the endoscope is provided with the negative pressure control valve, the first interface is connected to the suction channel of the endoscope, and the second interface is connected to the suction pump.

[0020] The negative pressure control valve of the present invention adopts a novel design scheme and reduces costs. As a disposable component, it can be discarded after ensuring safe use, avoiding the risk of cross infection and reducing potential risks to zero. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the exploded view of the negative pressure control valve of the present invention.

[0022] Figure 2 This is a first stereoscopic view of the negative pressure control valve of the present invention after assembly.

[0023] Figure 3 This is a second stereoscopic view of the negative pressure control valve of the present invention after assembly.

[0024] Figure 4a It is a cross-sectional view in the first direction of the negative pressure control valve of the present invention when it is assembled and in a closed state.

[0025] Figure 4b It is a cross-sectional view in the second direction of the negative pressure control valve of the present invention when it is assembled and in a closed state.

[0026] Figure 5a It is a cross-sectional view in the first direction of the negative pressure control valve of the present invention after being assembled and in a through-state.

[0027] Figure 5b It is a cross-sectional view in the second direction of the negative pressure control valve of the present invention after being assembled and in a through-state. DETAILED DESCRIPTION

[0028] In order to more clearly understand the technical content of the present invention, the following embodiments are given in detail.

[0029] With the advancement of medicine, endoscopes have been widely used as conventional products in various medical departments. The suction function is a basic and necessary function of each endoscope. Since the endoscope is an inspection instrument that enters the body cavity of different patients, the endoscope must be strictly disinfected and sterilized after use to reduce cross infection. Due to the internal structure and functional requirements of the suction button, the suction button must be completely disassembled and cleaned and disinfected one by one during disinfection. However, due to the structural design or possible negligence caused by cleaning and disinfection, it is easy to leave stains and if it is not fully cleaned, disinfected and sterilized, it may cause cross infection. Causing unnecessary potential medical disputes.

[0030] Based on a full understanding of the principle of the suction valve body, the present invention combines the simple air flow and the pressure formation state under the sealed state, designs the unit functions of each part into a unique role, and then combines each monomer into a suction component body with complete suction function, which becomes an important component of the endoscope. Due to the adoption of a novel design and reduced costs, as a disposable component, it can be discarded after safe use, avoiding the risk of cross infection. The potential risk is reduced to zero.

[0031] like Figure 1-5b As shown, it is a specific embodiment of the negative pressure control valve provided by the present invention, and the negative pressure control valve mainly includes the following components:

[0032] A hollow valve body 1, wherein the hollow valve body 1 comprises an outer shell and an inner cavity, wherein a first interface 2 and a second interface 3 are arranged on a side wall of the outer shell;

[0033] The valve core 4 is movably installed in the inner cavity of the hollow valve body 1, and the valve core 4 includes a first matching port 5 matching the first interface 2, a second matching port 6 matching the second interface 3, and a channel 7 connecting the first matching port 5 and the second matching port 6 (such as Figure 4a and 4b As shown), the valve core 4 is further provided with a first stopper 8 matched with the first interface 2 and a second stopper 9 matched with the second interface 3;

[0034] The negative pressure control valve is configured to have a closed state and a through state. In the closed state, Figure 4a As shown, the first interface 2 corresponds to the first stopper 8. Figure 4b As shown, the second interface 3 corresponds to the second stopper 9, so that the first interface 2 and the second interface 3 are not connected; in the through state, as shown Figure 5a As shown, the first interface 2 corresponds to the first matching port 5. Figure 5b As shown, the second interface 3 corresponds to the second matching port 6, so that the first interface 2 and the second interface 7 are connected. In the through state, the negative pressure control valve can realize the suction function. The negative pressure control valve can be switched to the through state by operating the upper end of the valve core 4 to move the valve core 4 relative to the hollow valve body 1.

[0035] like Figures 2-3 As shown, one of the two interfaces provided in the present invention can be used to connect the suction channel of the endoscope, and the other can be used to connect the suction tube of the suction pump. The interface is a circular hole with a certain area, and the internal aperture area is equal to the inner diameter of the conventional suction tube, such as the commonly used inner diameter of 3mm. To facilitate sealing and connection, the two interfaces are arranged one above the other in the axial direction and in different directions. In the embodiment provided by the present invention, the orientation difference between the two interfaces is 90°. According to the positions of the two interfaces, the positions of the first stopper and the second stopper are set accordingly, such as Figure 1 As shown, the second stopper 9 is arranged at the lower end of the valve core 4, the first stopper 8 is arranged between the upper end of the valve core 4 and the second stopper 9, a second matching port 6 is arranged between the first stopper 8 and the second stopper 9, and a first matching port 5 is arranged between the upper end of the valve core 4 and the first stopper 8. The positions of the first matching port 5, the second matching port 6, the first stopper 8, and the second stopper 9 can be adjusted accordingly according to the positions of the first interface 2 and the second interface 3.

[0036] like Figures 4a to 5b As shown, the first matching port 5 and the second matching port 6 are arranged to transversely penetrate both sides of the valve core and have an annular opening to increase the liquid flow rate and flow rate.

[0037] like Figure 1As shown, the negative pressure control valve includes a button 10, which is arranged at the upper end of the hollow valve body 1 and connected to the upper end of the valve core 4, and an elastic member 11 is arranged between the button 10 and the upper end of the hollow valve body 1. The elastic member 11 can be a silicone elastic ring or a spring, which can conveniently achieve a sealed connection between the button 10 and the elastic member 11, and between the elastic member 11 and the upper end of the hollow valve body 11.

[0038] like Figure 4a and 4b As shown, when the button 10 is not operated, the elastic force generated by the elastic member 11 supports the button 10, so that the negative pressure control valve can always remain in a closed state; Figure 5a and 5b , press the button 10, move the valve core 4 relative to the hollow valve body 1, so that the matching port in the valve core 4 corresponds to the interface, the two interfaces are connected, and the negative pressure control valve is switched to a through state; release the button 10, and the button 10 automatically resets through the elastic force of the elastic member 11 and switches to a closed state.

[0039] like Figure 1 , 4b As shown in Figure 5b, the first stopper 8 has an extension portion, and the extension portion is provided with two protrusions 19. The inner cavity of the hollow valve body 1 is provided with a guide groove 20 that matches the protrusion 19. The protrusion 19 moves along the guide groove 20, thereby guiding the movement of the valve core 4 in the inner cavity of the hollow valve body 1 to ensure that the valve core 4 does not deviate when moving up and down.

[0040] When the button 10 is not operated, the protrusion 19 abuts against the upper end wall of the guide groove 20 through the elastic force of the elastic member 11, thereby limiting the position of the valve core 4 relative to the hollow valve body 1 and keeping the negative pressure control valve in a closed state.

[0041] like Figure 4a and 5a As shown, the button 10 is provided with a first sealing bevel 14, and the upper end of the hollow valve body 1 is provided with a first matching bevel 15 matching with the first sealing bevel 14. When the negative pressure control valve is in a through state, the first sealing bevel 14 contacts with the first matching bevel 15, so that the button 10 and the upper end of the hollow valve body 1 are sealed.

[0042] In order to further seal the upper end of the hollow valve body, a third stopper 18 is provided at the upper end of the valve core 4 . The third stopper 18 is an annular stopper, and the outer diameter of the third stopper 18 matches the inner diameter of the upper end of the hollow valve body 1 .

[0043] like Figure 1 As shown, the first stopper 8 and the second stopper 9 are both annular stoppers, so that the valve core 4 is a special-shaped cylinder.

[0044] like Figures 4a to 5a As shown, the outer diameter of the second stopper 9 is set to be larger than the outer diameter of the first stopper 8, the second stopper 9 is provided with a second sealing slope 16, and the inner cavity of the hollow valve body 1 is provided with a second matching slope 17 matching with the second sealing slope 16. Figure 4a and 4b As shown, when the negative pressure control valve is in a closed state, the second sealing inclined surface 16 contacts the second matching inclined surface 17, so that the lower end of the valve core 4 is sealed with the hollow valve body 1. The liquid flows smoothly, and the inclined fan-shaped structure of the second stopper 9 is convenient for forming a basically closed state with the protruding inclined surface in the circular valve body.

[0045] In order to further seal the lower end of the hollow valve body 1, the negative pressure control valve includes a valve seat 13 and a base 12, and the base 12 is arranged between the valve seat 13 and the lower end of the hollow valve body 1 to seal and connect the valve seat 13 and the lower end of the hollow valve body 1.

[0046] In order to facilitate the installation between the valve seat 13 and the lower end of the hollow valve body 1, a positioning column 21 is set at the lower end of the hollow valve body 1, and the valve seat is provided with a slide groove 22 matching the positioning column 21 to ensure the stability between the valve seat 13 and the lower end of the hollow valve body 1.

[0047] The negative pressure control valve provided by the present invention can be conveniently processed into a disposable item through structural design, and is suitable for an endoscope to realize the suction function of the endoscope. When in use, the first interface 2 is connected to the suction channel of the endoscope, and the second interface 3 is connected to the suction pump.

[0048] When the elastic member is in the original position, the internal shaped cylinder moving up and down forms a state where the left and right channels of the circular valve body are not connected. At this time, even if a negative pressure device is connected at one end to absorb the liquid, the two channels cannot be connected because the circular valve body is in a sealed state, and negative pressure is formed in the cavity at this time, and there is a suction force that attracts the valve core, so that the second sealing slope 16 and the second matching slope 17 fit better, thereby increasing the sealing effect. When the shaped cylinder is pressed downward by the external button, the position of the shaped cylinder moves to form a connection between the left and right channels in the circular valve body, and the part pressing the button prevents the air gap between the shaped cylinder and the valve body to form a sealed state inside the valve body. The negative pressure of the suction pump passes through the internal gap of the shaped cylinder, so that the left and right channels are connected. The pressure of the sealed state inside the valve body continues to increase. With the increase of negative pressure and the movement of negative pressure to the other end, the liquid connected to the other end of the valve body can be extracted, achieving the purpose and effect of the design.

[0049] The negative pressure control valve of the present invention adopts a novel design scheme and reduces costs. As a disposable component, it can be discarded after ensuring safe use, avoiding the risk of cross infection and reducing potential risks to zero.

[0050] Therefore, the product of the present invention is an ideal invented product which is simple, has the same functions, is no different from the use of the traditional endoscope suction button, and reduces medical disputes.

[0051] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it is apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. A negative pressure control valve, characterized in that: include: A hollow valve body, wherein a first interface and a second interface are arranged on a side wall of the hollow valve body; A valve core is movably mounted in the inner cavity of the hollow valve body, the valve core comprises a first matching port matching the first interface, a second matching port matching the second interface, and a channel connecting the first matching port and the second matching port, and the valve core is provided with a first stopper matching the first interface and a second stopper matching the second interface; The negative pressure control valve is configured to have a closed state and a through state. In the closed state, the first interface corresponds to the first stopper, and the second interface corresponds to the second stopper, so that the first interface and the second interface are not connected. By operating the first end of the valve core, the valve core is moved relative to the hollow valve body to switch the negative pressure control valve to a through state. In the through state, the first interface corresponds to the first matching port, and the second interface corresponds to the second matching port, so that the first interface and the second interface are connected. The first stopper and the second stopper are both annular stoppers, the outer diameter of the second stopper is set to be larger than the outer diameter of the first stopper, the second stopper is provided with a second sealing inclined surface, the inner cavity of the hollow valve body is provided with a second matching inclined surface matching with the second sealing inclined surface, when the negative pressure control valve is in a closed state, the second sealing inclined surface contacts with the second matching inclined surface, so that the second end of the valve core is sealed with the hollow valve body; The negative pressure control valve comprises a valve seat, and the valve seat is arranged at the second end of the hollow valve body.

2. The negative pressure control valve according to claim 1, characterized in that: The negative pressure control valve includes a button, which is arranged at the first end of the hollow valve body and connected to the first end of the valve core. An elastic member is arranged between the button and the first end of the hollow valve body. Due to the elastic force of the elastic member, the negative pressure control valve remains in a closed state when the button is not operated; by pressing the button, the valve core is moved relative to the hollow valve body, switching the negative pressure control valve to a through state.

3. The negative pressure control valve according to claim 2, characterized in that: The button is provided with a first sealing bevel, and the first end of the hollow valve body is provided with a first matching bevel matching with the first sealing bevel. When the negative pressure control valve is in a through state, the first sealing bevel contacts with the first matching bevel, so that the button is sealed with the first end of the hollow valve body.

4. The negative pressure control valve according to claim 2, characterized in that: A third stopper is arranged at the first end of the valve core. The third stopper is an annular stopper. The outer diameter of the third stopper matches the inner diameter of the first end of the hollow valve body.

5. The negative pressure control valve according to claim 2, characterized in that: The first stopper has an extension portion, and the extension portion is provided with at least one protrusion. The inner cavity of the hollow valve body is provided with a guide groove matching the protrusion. The protrusion moves along the guide groove. When the button is not operated, the protrusion is limited to the end wall of the guide groove by the elastic force of the elastic member, so that the negative pressure control valve remains in a closed state.

6. The negative pressure control valve according to claim 1, characterized in that: The second stopper is arranged at the second end of the valve core, the first stopper is arranged between the first end of the valve core and the second stopper, a second matching port is arranged between the first stopper and the second stopper, and a first matching port is arranged between the first end of the valve core and the first stopper.

7. The negative pressure control valve according to claim 1, characterized in that: The negative pressure control valve comprises a base, and the base is arranged between the valve seat and the second end of the hollow valve body to seal and connect the valve seat and the second end of the hollow valve body.

8. An endoscope, characterized in that: The endoscope is provided with the negative pressure control valve according to any one of claims 1 to 7, the first interface is connected to the suction channel of the endoscope, and the second interface is connected to the suction pump.

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