Suction valve, endoscope handle and endoscope

Abstract

The utility model relates to the technical field of medical equipment, and discloses a suction valve, an endoscope handle and an endoscope, which comprise a valve seat, a valve rod and two first sealing pieces. Wherein the suction valve at least comprises a suction state and a normal pressure state, in the suction state, the first sealing piece located at the upper end of the suction channel moves to the position below the atmosphere through hole, the first sealing piece located at the lower end of the suction channel moves into the butt joint cavity, and at the moment, the negative pressure connector communicates with the butt joint cavity; in the normal pressure state, the two first sealing pieces seal the upper end and the lower end of the suction channel, and the atmosphere through hole communicates with the negative pressure connector. The two first sealing pieces are arranged to seal the installation cavity, the first sealing pieces can seal the inner space of the installation cavity during liquid suction, air is prevented from entering or flowing out of the upper portion of the installation cavity, generation of negative pressure is guaranteed, and the negative pressure adsorption efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, specifically, relate to a suction valve, endoscope handle and endoscope. BACKGROUND

[0002] Endoscope is widely applied in modern medical treatment, and in specific use, the insertion part of the endoscope is inserted into the human body, most of the handles of the endoscope used in operation are provided with suction valves, the distal end of the insertion part is provided with a suction port, a pipeline is arranged in the insertion part and is communicated with the suction valve and the suction port, and the communication or disconnection between the suction port and the external negative pressure source is realized through the suction valve.

[0003] The existing suction valve realizes the communication or disconnection between the suction port and the external negative pressure source by pressing the valve rod in use, but due to the limitation of the structure of the valve rod, the sealing effect of the working channel is poor when the suction valve communicates the suction port with the external negative pressure source, and the suction efficiency of the negative pressure source is low. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a suction valve, endoscope handle and endoscope to solve the technical problems in the prior art.

[0005] In order to realize the above-mentioned purpose, on one hand, the utility model provides a suction valve, which comprises:

[0006] A valve seat has a mounting cavity, an atmosphere through hole and a negative pressure interface communicated with the mounting cavity, and the bottom of the valve seat is provided with a butt joint cavity, and the inner diameter of the butt joint cavity is greater than that of the mounting cavity;

[0007] A valve rod is movably arranged in the mounting cavity, the inner diameter of the mounting cavity is greater than the diameter of the valve rod, and the gap between the outer side wall of the valve rod and the mounting cavity is the suction channel of the suction valve;

[0008] Two first sealing members are arranged on the outer side of the valve rod, and the atmosphere through hole and the negative pressure interface are located between the two first sealing members;

[0009] The suction valve comprises at least a suction state and a normal pressure state, in the suction state, the first sealing member located at the upper end of the suction channel moves below the atmosphere through hole, the first sealing member located at the lower end of the suction channel moves into the butt joint cavity, and at this moment, the negative pressure interface is communicated with the butt joint cavity; in the normal pressure state, the two first sealing members seal the upper and lower ends of the suction channel, and the atmosphere through hole and the negative pressure interface are communicated with each other.

[0010] Preferably, the side surface of the valve rod is provided with a mounting groove for mounting the first seal.

[0011] Preferably, the first seal is in interference fit with the inner wall of the mounting cavity.

[0012] Preferably, the atmospheric passage is located higher than the negative pressure interface.

[0013] Preferably, the top surface of the atmospheric passage is tangent to the bottom surface of the first seal at the upper end of the suction passage.

[0014] Preferably, the bottom surface of the negative pressure interface is tangent to the top surface of the first seal at the lower end of the suction passage.

[0015] Preferably, the bottom of the valve rod is provided with a second seal, which is located in the docking cavity, and the outer diameter of the second seal is between the inner diameter of the mounting cavity and the inner diameter of the docking cavity.

[0016] Preferably, the top of the valve rod is provided with a gland, and a reset member is arranged between the gland and the valve seat, which is used to drive the valve rod to switch from the suction state to the normal pressure state.

[0017] In a second aspect, the present application provides an endoscope handle, comprising a shell and the aforementioned suction valve, wherein the shell is provided with a suction valve mounting position, and the suction valve is arranged in the suction valve mounting position.

[0018] In a third aspect, the present application provides an endoscope, comprising the aforementioned endoscope handle.

[0019] The present application has the advantages that: two first seals are arranged to seal the mounting cavity, the first seal can seal the internal space of the mounting cavity during liquid suction, air is prevented from entering or flowing out from the upper part of the mounting cavity, the generation of negative pressure is ensured, and the efficiency of negative pressure adsorption is improved.

[0020] Other features and advantages of the present application will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0022] Figure 1 Fig. 1 shows a structure schematic view of a suction valve according to an embodiment of the present application;

[0023] Figure 2 Fig. 2 shows a cross-sectional view of the suction valve in a normal pressure state according to an embodiment of the present application.

[0024] Figure 3 A cross-sectional view of the suction valve in a suction state according to an embodiment of the present application is shown.

[0025] Figure 4 A schematic view of an endoscope handle structure according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] The specific embodiments described hereinbelow are intended to be illustrative only and are not intended to limit the scope of the present application. It should be understood that the specific embodiments described hereinbelow are merely exemplary and are not intended to limit the scope of the present application.

[0027] Example 1

[0028] Referring to Figures 1-3 The present embodiment discloses a suction valve, comprising a valve seat 1, a valve rod 2 and two first sealing members 3. The valve seat 1 has a mounting cavity 101, an atmospheric through hole 102 and a negative pressure interface 103 which are in communication with the mounting cavity 101, and a docking cavity 104 is arranged at the bottom of the valve seat 1, the inner diameter of the docking cavity 104 is larger than that of the mounting cavity 101, the valve rod 2 is movably arranged in the mounting cavity 101, the inner diameter of the mounting cavity 101 is larger than the diameter of the valve rod 2, the gap between the outer side wall of the valve rod 2 and the mounting cavity 101 is the suction passage of the suction valve, the two first sealing members 3 are sleeved on the outer side of the valve rod 2, the atmospheric through hole 102 and the negative pressure interface 103 are located between the two first sealing members 3, the suction valve at least comprises a suction state and a normal pressure state, in the suction state, the first sealing member 3 located at the upper end of the suction passage moves below the atmospheric through hole 102, the first sealing member 3 located at the lower end of the suction passage moves into the docking cavity 104, at this time, the negative pressure interface 103 is in communication with the docking cavity 104; in the normal pressure state, the two first sealing members 3 seal the upper and lower ends of the suction passage, the atmospheric through hole 102 and the negative pressure interface 103 are in communication with each other.

[0029] Referring to Figure 2 and Figure 3 In specific use, the negative pressure interface 103 is connected with a negative pressure source, the valve rod 2 is pressed down, so that the first sealing member 3 at the upper end of the suction passage moves to between the atmospheric through hole 102 and the negative pressure interface 103, to separate the negative pressure interface 103 from the docking cavity 104, at this time, the negative pressure interface 103 is in communication with the docking cavity 104, so that the liquid is sucked by negative pressure. When the liquid is not needed to be sucked, the negative pressure interface 103 and the docking cavity 104 are located between the upper and lower first sealing members 3, to prevent the liquid from seeping into the mounting cavity 101 from the bottom of the docking cavity 104. The two first sealing members 3 interact to seal the suction passage or separate the atmospheric through hole 102 and the negative pressure interface 103, to improve the overall sealing performance, to ensure that air cannot enter the suction passage during the negative pressure suction process, to improve the air tightness inside, and to ensure the negative pressure suction efficiency.

[0030] The side surface of the valve rod 2 is provided with a mounting groove for mounting the first sealing member 3, so that the installation is facilitated, the assembly difficulty is reduced, and the dislocation probability of the first sealing member 3 during movement of the valve rod 2 is reduced. The first sealing member 3 is in interference fit with the inner wall of the mounting cavity 101, so that the movement of the valve rod 2 is ensured, and the sealing performance is further ensured. Specifically, the first sealing member 3 is a sealing ring.

[0031] In this embodiment, the position of the atmospheric through hole 102 is higher than the position of the negative pressure interface 103. Specifically, the top surface of the atmospheric through hole 102 is tangent to the bottom surface of the first sealing member 3 at the upper end of the suction channel, and the bottom surface of the negative pressure interface 103 is tangent to the top surface of the first sealing member 3 at the lower end of the suction channel. In this way, the vertical distance between the atmospheric through hole 102 and the negative pressure interface 103 is maximized, and when the valve rod 2 is pressed, it does not need to be pressed to the bottom, the pressing force is reduced, the operation is more convenient, and the bottom surface of the negative pressure interface 103 is tangent to the top surface of the first sealing member 3 at the lower end of the suction channel. When absorbing liquid, the liquid flow distance is the shortest, so that the liquid can be quickly sucked, and the suction efficiency is improved.

[0032] Preferably, the bottom of the valve rod 2 is provided with a second sealing member 4, the second sealing member 4 is located in the docking cavity 104, and the outer diameter of the second sealing member 4 is between the inner diameter of the mounting cavity 101 and the inner diameter of the docking cavity 104. Under normal pressure, the liquid is prevented from flowing into the suction channel and flowing out from the atmospheric through hole 102 or the negative pressure interface 103 through the double sealing of the first sealing member 3 and the second sealing member 4.

[0033] Preferably, the top of the valve rod 2 is provided with a gland 21, and the gland 21 and the valve seat 1 are provided with a reset member 22, which is used to drive the valve rod 2 to switch from the suction state to the normal pressure state. The reset member 22 can automatically reset the valve rod 2 to the normal pressure state after the negative pressure suction is completed. Specifically, the reset member 22 can be a spring.

[0034] Embodiment 2

[0035] Please refer to Figure 4 , the embodiment provides an endoscope handle, which comprises a shell and the suction valve in embodiment 1, and the shell 100 is provided with a suction valve mounting position, and the suction valve is arranged in the suction valve mounting position.

[0036] Embodiment 3

[0037] In a third aspect, the embodiment provides an endoscope, which comprises the endoscope handle in embodiment 2. The endoscope in the embodiment can be a bronchoscope, a nephroscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasoscope, an oral mirror, a laryngoscope, a vaginal mirror, a laparoscope, an arthroscope, etc. The type of the endoscope is not limited in the embodiment.

[0038] In summary, the embodiment seals the installation cavity 101 by setting two first sealing members 3, the first sealing members 3 can seal the internal space of the installation cavity 101 when sucking liquid, prevent air from entering or flowing out from the upper part of the installation cavity 101, ensure the generation of negative pressure, and improve the efficiency of negative pressure adsorption.

[0039] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the utility model within the technical concept of the utility model, and these simple modifications all belong to the protection scope of the utility model. In addition, it should be noted that various specific technical features described in the above-described specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the utility model will not further describe various possible combination manners.

[0040] In addition, various different embodiments of the utility model can also be combined in any manner, as long as they do not deviate from the idea of the utility model, and they should also be considered as disclosed content of the utility model.

Claims

1. A suction valve characterized by, The application relates to an aspirating valve. The valve seat has a mounting cavity, an atmospheric air through hole and a negative pressure interface which are communicated with the mounting cavity, and the bottom of the valve seat is provided with a docking cavity with an inner diameter larger than that of the mounting cavity. The valve rod is movably arranged in the mounting cavity, the inner diameter of the mounting cavity is larger than the diameter of the valve rod, and the gap between the outer side wall of the valve rod and the mounting cavity is the suction channel of the aspirating valve. The first seal is provided with two first seals which are sleeved on the outer side of the valve rod, and the atmospheric air through hole and the negative pressure interface are located between the two first seals. The aspirating valve comprises at least an aspirating state and a normal pressure state.

2. The suction valve according to claim 1, characterized in that The side of the valve rod is provided with a mounting groove for mounting the first seal.

3. The suction valve according to claim 2, characterized in that The first seal is in interference fit with the inner wall of the mounting cavity.

4. The suction valve according to claim 1, characterized in that The position of the atmospheric air through hole is higher than that of the negative pressure interface.

5. The suction valve according to claim 4, characterized in that The top surface of the atmospheric air through hole is tangent to the bottom surface of the first seal at the upper end of the suction channel.

6. The suction valve according to claim 5, characterized in that The bottom surface of the negative pressure interface is tangent to the top surface of the first seal at the lower end of the suction channel.

7. The suction valve according to any one of claims 1 to 6, characterized in that The bottom of the valve rod is provided with a second seal which is located in the docking cavity, and the outer diameter of the second seal is between the inner diameter of the mounting cavity and the inner diameter of the docking cavity.

8. The suction valve according to any one of claims 1 to 6, characterized in that The top of the valve rod is provided with a gland, and the gland and the valve seat are provided with a reset member for driving the valve rod to switch from the aspirating state to the normal pressure state.

9. An endoscope handle, characterized by The application relates to an endoscope handle.

10. An endoscope characterized by comprising: The application relates to an endoscope handle.

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