WO2023071853A1 - 一种吸引阀组件及内窥镜 - Google Patents

一种吸引阀组件及内窥镜 Download PDF

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Publication number
WO2023071853A1
WO2023071853A1 PCT/CN2022/125755 CN2022125755W WO2023071853A1 WO 2023071853 A1 WO2023071853 A1 WO 2023071853A1 CN 2022125755 W CN2022125755 W CN 2022125755W WO 2023071853 A1 WO2023071853 A1 WO 2023071853A1
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WIPO (PCT)
Prior art keywords
valve housing
piston
sealing body
suction
protrusion
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PCT/CN2022/125755
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English (en)
French (fr)
Inventor
贾晓峰
熊金云
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湖南省华芯医疗器械有限公司
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Publication of WO2023071853A1 publication Critical patent/WO2023071853A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves

Definitions

  • the utility model relates to a suction valve assembly, in particular to a suction valve assembly and an endoscope.
  • the suction valve is often used in conjunction with the endoscope.
  • the fluid in the patient's body can be sucked through the suction valve to eliminate the fluid interference during the inspection and treatment process and ensure the observation field of view.
  • the insertion part of the endoscope usually used for surgery is provided with a suction pipeline that communicates with the suction port on the front surface.
  • the function of the suction device is to connect the suction pipeline with the external negative pressure source pipeline.
  • the negative pressure source includes a suction pump. , negative pressure machine, etc.
  • the endoscope suction valve has complex structural features and poor sealing performance.
  • tissue fluid often leaks from the casing of the suction valve, which is very easy to use. cause infection.
  • the purpose of the first aspect of the utility model is to provide a suction valve assembly, the suction valve includes a coaxially arranged elastic sleeve, a valve housing and a piston;
  • One end of the elastic sleeve is fixed on the valve housing, the other end of the elastic sleeve is in contact with the piston, and the piston can slide axially relative to the valve housing;
  • the valve housing includes an upper valve housing, a lower valve housing and a sealing body, the sealing body is located between the upper valve housing and the lower valve housing, and the upper valve housing and the lower valve housing are detachably connected; the When the piston is in the first position, the elastic sleeve provides the force for the piston to press the sealing body.
  • the inner wall of the upper valve housing is provided with an annular first limiting groove
  • the outer wall of the lower valve housing is provided with an annular first limiting protrusion
  • the outer wall of the upper valve housing is provided with a second limiting protrusion extending along the axial direction of the valve housing
  • the outer wall of the lower valve housing is provided with a second limiting protrusion extending along the axial direction of the valve housing. Groove; when the upper valve casing is connected to the lower valve casing, the second limiting protrusion is inserted into the second limiting groove.
  • the sealing body is provided with a third limiting groove
  • the upper valve housing is provided with a third limiting protrusion; when the upper valve housing and the lower valve housing are connected, the third limiting The positioning protrusion is embedded in the third limiting groove.
  • a tapered protrusion is provided on the end surface of the lower valve housing in contact with the sealing body, and when the upper valve housing and the lower valve housing are connected, the tapered protrusion presses the sealing body. body and deform the axial direction of the sealing body.
  • the piston squeezes the sealing body and deforms the sealing body.
  • a guide body is provided on the piston rod, and the outer diameter of the guide body is smaller than the inner diameter of the upper valve casing.
  • the elastic sleeve is provided with a fourth limit groove
  • the upper valve casing is provided with a fourth limit protrusion; when the elastic sleeve is fixed on the upper valve casing, the fourth limit The protrusion is embedded in the fourth limiting groove.
  • a second aspect of the present invention provides a handle for an endoscope, the handle includes a handle body, and the aforementioned suction valve assembly is detachably arranged on the handle body.
  • the third aspect of the present utility model provides an endoscope, which includes the aforementioned suction valve assembly, or the aforementioned handle.
  • the utility model divides the valve casing into an upper valve casing, a lower valve casing and a sealing body which are detachably connected.
  • the sealing body is located between the upper valve housing and the lower valve housing, which enhances the sealing performance of the connection structure between the upper valve housing and the lower valve housing; at the same time, through the cooperation with the piston head, the suction The opening and closing of the channel; while realizing the simplification of the structure of the suction valve, the sealing performance of the suction valve is enhanced.
  • the utility model arranges conical protrusions on the end surface of the lower valve housing in contact with the sealing body, so that when the upper valve housing and the lower valve housing are connected, the conical protrusions on the lower valve housing form a squeeze on the sealing body , so that the sealing body is deformed, so that the sealing body is in close contact with the upper valve casing and the lower valve casing, and the sealing performance of the valve casing is further enhanced.
  • the utility model is provided with a fourth limiting groove on the elastic sleeve, and a fourth limiting protrusion corresponding to the position and structure of the fourth limiting groove is arranged on the upper valve housing, and the elastic sleeve is assembled to the When the valve casing is put on, the fourth position-limiting protrusion is embedded in the fourth position-limiting groove to play a position-limiting role.
  • Fig. 1 is a schematic diagram of the overall structure of a suction valve assembly in an embodiment of the present invention
  • Fig. 2 is a split schematic diagram of the suction valve assembly shown in Fig. 1;
  • Fig. 3 is a schematic diagram of the structure of the upper valve housing shown in Fig. 2;
  • Fig. 4 is a sectional view of the upper valve housing structure shown in Fig. 3;
  • Fig. 5 is a schematic diagram of the structure of the lower valve housing shown in Fig. 2;
  • Fig. 6 is a sectional view of the lower valve housing structure shown in Fig. 5;
  • Fig. 7 is an enlarged view of the structure of the lower valve casing shown in Fig. 6;
  • Fig. 8 is a schematic diagram of the structure of the sealing body shown in Fig. 2;
  • Fig. 9 is a cross-sectional view of the structure of the sealing body shown in Fig. 8.
  • Fig. 10 is a schematic diagram of the piston structure shown in Fig. 2;
  • Fig. 11 is a schematic structural diagram of the elastic cap shown in Fig. 2;
  • Fig. 12 is a sectional view of the elastic cap shown in Fig. 11;
  • Fig. 13 is a sectional view of the overall structure of a suction valve assembly in an embodiment of the present invention.
  • An endoscope is a commonly used medical device.
  • a conventional endoscope includes an operating part (also referred to as a handle) and an insertion part.
  • the handle part is used for manipulating the insertion part to enter the human body, and controls the direction of the insertion part through the handle part, so as to provide doctors with images of lesion sites.
  • the insertion part of the endoscope is provided with a suction pipeline connected to the suction port on the front end surface.
  • the function of the suction valve is to connect the suction pipeline with the external negative pressure source pipeline.
  • the negative pressure source includes a suction pump, a negative pressure machine, etc.
  • the valve casing structure of the endoscope suction valve in the prior art is usually composed of an inner valve casing and an outer valve casing.
  • this kind of suction valve has a complex structure and a relatively complicated process flow during assembly; on the other hand, the sealing performance Poor, when the valve body is opened for suction operation, tissue fluid often leaks from the casing of the suction valve, which is very easy to cause infection during use.
  • an embodiment of the present invention provides a suction valve assembly, the suction valve includes an elastic sleeve 1, a valve housing 2 and a piston 3 arranged coaxially;
  • One end of the elastic sleeve 1 is fixed on the valve housing 2, the other end of the elastic sleeve 1 abuts against the piston 3, and the piston 3 can slide axially relative to the valve housing 2;
  • the valve housing 2 includes an upper valve housing 21, a lower valve housing 22 and a sealing body 23, the sealing body 23 is located between the upper valve housing 21 and the lower valve housing 22, the upper valve housing 21 and the lower valve housing
  • the valve housing 22 is detachably connected; when the piston 3 is in the first position, the elastic sleeve 1 provides the force for the piston 3 to press the sealing body 23 .
  • the elastic sleeve 1 is sleeved on the piston 3 .
  • One end of it abuts against the piston 3, and the other end is fixedly connected to the valve casing 2; therefore, when the piston 3 is pressed by the outside, making the piston 3 move toward the axial direction of the valve casing 2, the piston 3 will move toward the elastic sleeve 1.
  • Extrusion occurs to deform the elastic sleeve 1; when the external pressing force received by the piston 3 disappears, under the elastic action of the elastic sleeve 1, the piston 3 slides away from the valve housing 2 until the piston head of the piston 3 and the sealing body 23 touch.
  • valve casing 2 is divided into an upper valve casing 21 , a lower valve casing 22 and a sealing body 23 which are detachably connected.
  • the sealing body 23 When assembling, first install the sealing body 23 on the corresponding position on the end surface of the lower valve housing 22, and then connect and fix the lower valve housing 22 with the sealing body 23 installed thereon and the upper valve housing 21 to complete the structure of the suction valve housing 2
  • the whole assembly process is simple and convenient to operate, which greatly improves the production efficiency.
  • the sealing body 23 is made of plastic material, which has lower hardness compared with the structure of the valve housing 2 .
  • the sealing body 23 is made of silica gel.
  • the elastic sleeve 1 provides the force for the piston head of the piston 3 to press the sealing body 23 .
  • the first position refers to the position where the piston 3 is when it is not pressed by the outside world.
  • the suction channel refers to the passage between the suction port at the far end of the endoscope and the external negative pressure source.
  • the sealing body 23 in the above scheme is located between the upper valve housing 21 and the lower valve housing 22, which enhances the tightness of the connection structure between the upper valve housing 21 and the lower valve housing 22, and at the same time, through the cooperation with the piston head, realizes The opening and closing of the suction channel is realized; while the structure of the suction valve is simplified, the sealing performance of the suction valve is enhanced.
  • the inner wall of the upper valve housing 21 is provided with an annular first limiting groove 211
  • the outer wall of the lower valve housing 22 is provided with an annular first limiting groove.
  • the protrusion 221 when the upper valve casing 21 and the lower valve casing 22 are connected, the first limiting protrusion 221 is inserted into the first limiting groove 211 .
  • connection structure between the upper valve housing 21 and the lower valve housing 22 is provided, that is, the upper valve housing 21 and the lower valve housing 22 are realized through the cooperation of the annular limiting groove and the annular limiting protrusion. connect.
  • annular shape may be closed or partially closed.
  • annular first position-limiting protrusion 221 is provided on the outer wall of the lower valve housing 22, and on the inner wall at the opposite end of the upper valve housing 21 and the lower valve housing 22, a position corresponding to the position of the first position-limiting protrusion 221 and
  • the first limiting groove 211 has a corresponding shape; when the upper valve housing 21 and the lower valve housing 22 are connected, the first limiting protrusion 221 is inserted into the first limiting groove 211 .
  • the positions of the first limiting protrusion 221 and the first limiting groove 211 can also be exchanged, that is, the annular first limiting groove 211 is set on the lower valve casing 22, and the annular first limiting groove 211 is set on the upper valve casing 21.
  • the utility model point at the core of this embodiment is to set the valve body structure of the suction valve as an upper and lower split type, and this embodiment provides a connection structure preferably between the upper valve housing 21 and the lower valve housing 22 .
  • this embodiment provides a connection structure preferably between the upper valve housing 21 and the lower valve housing 22 .
  • other common clamping structures may also be provided, as long as the detachable connection between the upper valve casing 21 and the lower valve casing 22 can be realized, and there is no limitation here.
  • the outer wall of the upper valve housing 21 is provided with a second limit protrusion 212 extending along the axial direction of the valve housing 2
  • the outer wall of the lower valve housing 22 is provided with There is a second limiting groove 222 extending along the axial direction of the valve housing 2; when the upper valve housing 21 and the lower valve housing 22 are connected, the second limiting protrusion 212 is inserted into the second limiting groove 222 within.
  • the second limit protrusion 212 can be set on the outer wall of the upper valve housing 21
  • the second limit groove 222 can be set on the outer wall of the lower valve housing 22
  • the second limit protrusion can also be set on the outer wall of the lower valve housing 22.
  • a second limiting groove 222 is provided on the outer wall of the upper valve housing 21, which is not limited here.
  • the second limit protrusion 212 abuts against the mounting seat in the handle housing of the endoscope to realize the suction valve of the endoscope. Mounting on the handle.
  • the second limiting protrusion 212 is configured as a straight protrusion
  • the second limiting groove 222 is configured as a straight groove
  • the sealing body 23 is provided with a third limiting groove 231, and the upper valve housing 21 is provided with a third limiting protrusion 223; when the upper valve housing 21 and the lower valve housing 22 are connected , the third limiting protrusion 223 is inserted into the third limiting groove 231 .
  • a third limiting protrusion 223 and a third limiting groove 231 are respectively provided on the contact surfaces of the sealing body 23 and the upper valve casing 21 .
  • the third limiting protrusion 223 is inserted into the third limiting groove 231 .
  • the positions of the third limiting groove 231 and the third limiting protrusion 223 can also be exchanged, that is, the third limiting protrusion 223 is provided on the sealing body 23, and the third limiting protrusion 223 is provided on the upper valve housing 21.
  • the bit slot 231 is not limited here.
  • the end surface of the lower valve housing 22 in contact with the sealing body 23 is provided with a tapered protrusion 223, when the upper valve housing 21 and the lower valve housing 22 is connected, the tapered protrusion 223 presses the sealing body 23 and deforms the sealing body 23 in the axial direction.
  • the tapered protrusion 223 means that the shape of the protrusion has a non-smooth transition, and a sharp point is provided on the protrusion.
  • the elasticity of the elastic sleeve 1 is limited.
  • the elastic sleeve 1 When the piston 3 is in the first position, due to the elastic effect of the elastic sleeve 1 itself, the elastic sleeve 1 produces a squeeze along the axial direction of the piston 3 on the upstream end of the piston 3 (the end close to the elastic sleeve 1 is the upstream end). pressure (the direction of the extrusion force is directed upstream of the piston 3 along the axial direction of the piston 3), thereby maintaining the piston 3 in the first position.
  • the piston head of the piston 3 presses the sealing body 23 and deforms the sealing body 23, so that the gap between the piston head of the piston 3 and the sealing body 23 Form an interference fit. Therefore, the sealing connection between the piston head of the piston 3 and the sealing body 23 can be further ensured, and the suction channel can be blocked.
  • a guide body 31 is provided on the piston rod, and the outer diameter of the guide body 31 is smaller than the inner diameter of the upper valve casing 21 .
  • the elastic sleeve 1 is provided with a fourth limiting groove 11, and the upper valve housing 21 is provided with a fourth limiting protrusion 214; when the When the elastic sleeve 1 is fixed on the upper valve housing 21 , the fourth limiting protrusion 214 is inserted into the fourth limiting groove 11 .
  • the material of the elastic sleeve 1 is preferably plastic material, which has a lower hardness than the valve housing 2 . Therefore, when the elastic sleeve 1 made of soft material is assembled on the valve casing 2, problems such as edge curling and twisting deformation are likely to occur.
  • the fourth position-limiting protrusion 214 is inserted into the fourth position-limiting groove 11 to play a position-limiting role.
  • Another embodiment of the present invention provides an endoscope handle, which includes a handle body, on which the aforementioned suction valve assembly is detachably arranged.
  • Another embodiment of the present utility model provides an endoscope, which includes the aforementioned suction valve assembly, or the aforementioned handle.

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Abstract

一种吸引阀组件及内窥镜，吸引阀组件包括同轴设置的弹性套（1）、阀壳（2）和活塞（3）；弹性套（1）的一端固定于阀壳（2）上，弹性套（1）的另一端与活塞（3）抵接，活塞（3）可相对于阀壳（2）轴向滑动；阀壳（2）包括上阀壳（21）、下阀壳（22）和密封体（23），密封体（23）位于上阀壳（21）和下阀壳（22）之间，上阀壳（21）和下阀壳（22）可拆卸连接；活塞（3）处于第一位置时，弹性套（1）提供活塞（3）挤压密封体（23）的作用力。

Description

一种吸引阀组件及内窥镜 技术领域
本实用新型涉及一种吸引阀组件，尤其是涉及一种吸引阀组件及内窥镜。
背景技术
在医疗领域，吸引阀经常与内窥镜配合使用，当医疗人员通过内窥镜观察病变部位时，可以通过吸引阀抽吸病人体内的流体，排除检查和治疗过程中的流体干扰，保证观察视野。目前通常手术用的内窥镜的插入部内设有与该前端面的吸引口连通的吸引管路，吸引装置作用是连通吸引管路与外接的负压源管路，负压源包括吸引泵、负压机等，手术时按压操作吸引装置的按钮，将吸引口与负压源管路连通从而对吸引口进行吸引，可以将内部病变组织的体液以及切除的病变组织吸出，当解除按压操作时，将吸引管路与负压源管路的连通切断而停止来自吸引口的吸引。
现有技术中，内窥镜吸引阀一方面结构特征复杂，且密封性不好，当开启阀体进行抽吸作业后，常常出现组织液从吸引阀的壳体间泄露的情况，使用时极易造成感染。
实用新型内容
为了解决上述问题，本实用新型第一方面的目的是，提供了一种吸引阀组件，所述吸引阀包括同轴设置的弹性套、阀壳和活塞；
所述弹性套的一端固定于所述阀壳上，所述弹性套的另一端与所述活塞抵接，所述活塞可相对于所述阀壳轴向滑动；
所述阀壳包括上阀壳、下阀壳和密封体，所述密封体位于所述上阀壳和下阀壳之间，所述上阀壳和所述下阀壳可拆卸连接；所述活塞处于第一位置时，所述弹性套提供所述活塞挤压所述密封体的作用力。
进一步地，所述上阀壳的内壁上设有环状的第一限位槽，所述下阀壳外壁上设有环状的第一限位凸起，所述上阀壳和所述下阀壳连接时，所述第一限位凸起嵌入所述第一限位槽内。
进一步地，所述上阀壳的外壁上设有沿阀壳轴向方向延伸的第二限位凸起，所述下阀壳的外壁上设有沿阀壳轴向方向延伸的第二限位槽；所述上阀壳和所述下阀壳连接时，所述第二限位凸起嵌入所述第二限位槽内。
进一步地，所述密封体上设有第三限位槽，所述上阀壳上设有第三限位凸起；所述上阀壳和所述下阀壳连接时，所述第三限位凸起嵌入所述第三限位槽内。
进一步地，所述下阀壳与所述密封体相接触的端面上设有锥形凸起，所述上阀壳和所述下阀壳连接时，所述锥形凸起挤压所述密封体并使所述密封体的轴向方向发生变形。
进一步地，所述活塞处于第一位置时，所述活塞挤压所述密封体并使所述密封体产生变形。
进一步地，所述活塞杆上设有引导体，所述引导体的外径小于所述上阀壳的内径。
进一步地，所述弹性套上设有第四限位槽，所述上阀壳上设有第四限位凸起；所述弹性套固定于所述上阀壳时，所述第四限位凸起嵌入所述第四限位槽内。
本实用新型的第二方面，提供了一种手柄，该手柄用于内窥镜，所述手柄包括手柄主体，所述手柄主体上可拆卸的设置有前述的吸引阀组件。
本实用新型的第三方面，提供了一种内窥镜，所述内窥镜包括前述的吸引阀组件，或前述的手柄。
与现有技术相比，本实用新型的有益技术效果为：
1)本实用新型将阀壳分为可拆卸连接的上阀壳、下阀壳和密封体。组装时，先将密封体安装于下阀壳端面的相应位置，然后将安装有密封体的下阀壳和上 阀壳之间连接固定，即可完成吸引阀阀壳结构的组装，整个组装过程操作简单方便，大大提高了生产效率。
2)本实用新型将密封体位于上阀壳和下阀壳之间，其即增强了上阀壳和下阀壳之间连接结构的密封性；同时通过与活塞头的配合，实现了对吸引通道的启闭；在实现简化吸引阀结构的同时，增强了吸引阀的密封性。
3)本实用新型通过在下阀壳与密封体相接触的端面上设置锥形凸起，使得当上阀壳和下阀壳连接时，下阀壳上的锥形凸起对密封体形成挤压，使密封体产生变形，从而使得密封体与上阀壳、下阀壳之间紧密接触，进一步地增强了阀壳的密封性。
4)本实用新型当活塞保持在第一位置时，活塞的活塞头挤压所述密封体并使所述密封体产生变形，使所述活塞的活塞头和密封体之间形成过盈配合；从而可以进一步地保证活塞的活塞头和密封体之间的密封连接，实现吸引通道的隔断。
5)本实用新型通过在弹性套上设有第四限位槽，在上阀壳上设有与第四限位槽位置及结构相对应的第四限位凸起，在将弹性套组装到上阀壳时，第四限位凸起嵌入第四限位槽内，起到限位作用。
附图说明
为了更清楚地说明本实用新型实施例的技术方案，下面将对本实用新型实施例或现有技术描述中所需要使用的附图作简单的介绍，显而易见地，下面所描述的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本实用新型一个实施例中一种吸引阀组件整体结构示意图；
图2是图1图1所示吸引阀组件分体示意图；
图3是图2所示上阀壳结构示意图；
图4是图3所示上阀壳结构剖视图；
图5是图2所示下阀壳结构示意图；
图6是图5所示下阀壳结构剖视图；
图7是图6所示下阀壳结构部分结构放大图；
图8是图2所示密封体结构示意图；
图9是图8所示密封体结构剖视图；
图10是图2所示活塞结构示意图；
图11是图2所示弹性帽结构示意图；
图12是图11所示弹性帽剖视图；
图13是本实用新型一个实施例中一种吸引阀组件整体结构剖视图；
图中：1-弹性套，11-第四限位槽，2-阀壳，21-上阀壳，211-第一限位槽，212-第二限位凸起，213-第三限位凸起，214-第四限位凸起，22-下阀壳，221-第一限位凸起，222-第二限位槽，223-锥形凸起，23-密封体，231-第三限位槽，3-活塞，31-引导体。
具体实施方式
以下的说明提供了许多不同的实施例、或是例子，用来实施本实用新型的不同特征。以下特定例子所描述的元件和排列方式，仅用来精简的表达本实用新型，其仅作为例子，而并非用以限制本实用新型。
内窥镜是一种常用的医疗器械。现有技术中，常规的内窥镜包括操作部(又称为手柄)和插入部。手柄部用于操控插入部进入人体，并通过手柄部控制插入部的朝向，从而为医生提供病灶部位的影像。
同时，在内窥镜的手柄部上常设有吸引阀，吸引按钮主要用于控制插入部远端的吸引功能，实现将病灶部位液体、碎屑等吸引出体外，从而提高内窥镜图像的观察清晰度。内窥镜的插入部内设有与该前端面的吸引口连通的吸引管路，吸引阀作用是连通吸引管路与外接的负压源管路，负压源包括吸引泵、负压机等，手术时按压操作吸引装置的按钮，将吸引口与负压源管路连通从而对吸引口进行吸引，可以将内部病变组织的体液以及切除的病变组织吸出，当解除按压操作时，将吸引管路与负压源管路的连通切断而停止来自吸引口的吸引。
现有技术中的内窥镜吸引阀的阀壳结构，常常是由内阀壳和外阀壳组成，这种吸引阀，一方面结构复杂，组装时工艺流程较为复杂；另一方面，密封性能较差，当开启阀体进行抽吸作业后，常常出现组织液从吸引阀的壳体间泄露的情况，使用时极易造成感染。
鉴于此，如图1至图13所示，本实用新型的一个实施例，提供了一种吸引阀组件，所述吸引阀包括同轴设置的弹性套1、阀壳2和活塞3；
所述弹性套1的一端固定于所述阀壳2上，所述弹性套1的另一端与所述活塞3抵接，所述活塞3可相对于所述阀壳2轴向滑动；
所述阀壳2包括上阀壳21、下阀壳22和密封体23，所述密封体23位于所述上阀壳21和下阀壳22之间，所述上阀壳21和所述下阀壳22可拆卸连接；所述活塞3处于第一位置时，所述弹性套1提供所述活塞3挤压所述密封体23的作用力。
上述方案中，将弹性套1套设在活塞3上。其一端与活塞3抵接，另一端固定连接在阀壳2上；因此，当活塞3受到外界的按压力，使得活塞3朝向阀壳2的轴向方向运动时，活塞3对弹性套1会产生挤压，使得弹性套1发生变形；活塞3受到的外界按压力消失时，弹性套1的弹性作用下，活塞3向着远离阀壳2的方向滑动，直至活塞3的活塞头与密封体23接触。
上述方案中，将阀壳2分为可拆卸连接的上阀壳21、下阀壳22和密封体23。组装时，先将密封体23安装于下阀壳22端面的相应位置，然后将安装有密封体23的下阀壳22和上阀壳21之间连接固定，即可完成吸引阀阀壳2结构的组装，整个组装过程操作简单方便，大大提高了生产效率。
所述密封体23为塑料材质，其相对于所述阀壳2结构，具有较低的硬度。优选地，所述密封体23为硅胶材质。
同时，当所述活塞3处于第一位置时，所述弹性套1提供所述活塞3的活塞头挤压所述密封体23的作用力。其中第一位置指的是，活塞3未受到外界的按压时所处的位置。
即上述方案中，是通过密封体23与活塞3的活塞头的配合，实现吸引阀内吸引通道的开启和关闭。其中吸引通道指的是，内窥镜远端的吸引口与外界负压源之间的通路。
具体地：当活塞3处于第一位置时，在弹性套1的作用下，活塞3挤压密封体23，使得活塞3与密封体23之间紧密接触，此时，吸引阀的吸引通道处于关闭的状态；当活塞3受到来自外界的挤压力后(如操作人员手指对活塞3端部的按压)，活塞3沿阀壳2的轴向方向发生滑动，即活塞3处于第二位置时，活塞头和密封体23之间产生间隙，使得吸引阀的吸引通道打开，实现吸引功能。
上述方案中的密封体23位于上阀壳21和下阀壳22之间，其即增强了上阀壳21和下阀壳22之间连接结构的密封性，同时通过与活塞头的配合，实现了对吸引通道的启闭；在实现简化吸引阀结构的同时，增强了吸引阀的密封性。
优选地，如图4、图6所示，所述上阀壳21的内壁上设有环状的第一限位槽211，所述下阀壳22外壁上设有环状的第一限位凸起221，所述上阀壳21和所述下阀壳22连接时，所述第一限位凸起221嵌入所述第一限位槽211内。
上述方案中，提供了一种上阀壳21和下阀壳22之间的连接结构，即通过环状限位槽和环状限位凸起的配合实现上阀壳21和下阀壳22的连接。其中，“环状”可以为封闭的，也可以是部封闭的。
具体地，在下阀壳22外壁上设置环状的第一限位凸起221，在上阀壳21与下阀壳22相对一端的内壁上，设置与所述第一限位凸起221位置及形状相对应的第一限位槽211；当上阀壳21和下阀壳22连接时，第一限位凸起221嵌入所述第一限位槽211内。
当然，也可以将第一限位凸起221和第一限位槽211的位置互换，即在下阀壳22上设置环状的第一限位槽211，在上阀壳21上设置环状的第一限位凸起221。
本实施例核心的实用新型点在于将吸引阀的阀体结构设置为上下分体式， 本实施例中提供了一种优选地上阀壳21和下阀壳22的连接结构。在替代方案中，也可以设置其他的常见的卡接结构，只要能实现上阀壳21和下阀壳22之间的可拆卸连接即可，在此不做限制。
优选地，如图3至图6所示，所述上阀壳21的外壁上设有沿阀壳2轴向方向延伸的第二限位凸起212，所述下阀壳22的外壁上设有沿阀壳2轴向方向延伸的第二限位槽222；所述上阀壳21和所述下阀壳22连接时，所述第二限位凸起212嵌入所述第二限位槽222内。
当上阀壳21和下阀壳22通过第一限位槽211和第一限位凸起221轴向连接之后，在一些使用情况下，还可能出现上阀壳21和下阀壳22在周向方向上的相对转动的情况。
因此，上述方案中，通过在上阀壳21和下阀壳22的外壁上设置沿阀壳2轴向方向延伸的第二限位凸起212和第二限位槽222，实现对上阀壳21和下阀壳22连接时，两者周向方向上的限位。其中，可以在上阀壳21的外壁上设置第二限位凸起212，在下阀壳22的外壁上设置第二限位槽222，也可以在下阀壳22的外壁上设置第二限位凸起212，在上阀壳21的外壁上设置第二限位槽222，在此不做限制。
同时，当将所述吸引阀安装于内窥镜的手柄上时，所述第二限位凸起212抵靠在内窥镜手柄壳体内的安装座上，实现所述吸引阀在内窥镜手柄上的安装。
优选地，将所述第二限位凸起212设置为一字型的凸起，将所述第二限位槽222设置为一字型的凹槽。
优选地，所述密封体23上设有第三限位槽231，所述上阀壳21上设有第三限位凸起223；所述上阀壳21和所述下阀壳22连接时，所述第三限位凸起223嵌入所述第三限位槽231内。
上述方案中，为了进一步增强密封体23对上阀壳21和下阀壳22连接时的密封作用。在密封体23和上阀壳21两者相接触的面上分别设置第三限位凸起223和第三限位槽231。当上阀壳21和下阀壳22连接时，第三限位凸起223 嵌入第三限位槽231内。
当然，也可以将上述第三限位槽231和第三限位凸起223的位置互换，即在密封体23上设置第三限位凸起223，在上阀壳21上设置第三限位槽231，在此不做限制。
进一步地，如图6、图7所示，所述下阀壳22与所述密封体23相接触的端面上设有锥形凸起223，当所述上阀壳21和所述下阀壳22连接时，所述锥形凸起223挤压所述密封体23并使所述密封体23的轴向方向发生变形。
锥形凸起223指的是，所述凸起外形非圆滑过渡，在所述凸起上设置有一个尖端。上述方案中，通过在下阀壳22与密封体23相接触的端面上设置锥形凸起223，使得当上阀壳21和下阀壳22连接时，下阀壳22上的锥形凸起223对密封体23形成挤压，使密封体23产生变形，从而使得密封体23与上阀壳21、下阀壳22之间紧密接触，进一步地增强了阀壳2的密封性。
进一步地，如图13所示，当所述活塞3处于第一位置时，所述活塞3挤压所述密封体23并使所述密封体23产生变形。
上述方案中，对弹性套1弹性大小进行了限制。当活塞3处于第一位置时，由于弹性套1自身的弹性作用，使得弹性套1对活塞3上游的端部(靠近弹性套1的一端为上游端部)产生沿活塞3轴向方向的挤压力(挤压力的方向沿活塞3的轴向指向活塞3的上游)，从而将所述活塞3保持在第一位置。
优选地，当活塞3保持在第一位置时，活塞3的活塞头挤压所述密封体23，并使所述密封体23产生变形，使所述活塞3的活塞头和密封体23之间形成过盈配合。从而可以进一步地保证活塞3的活塞头和密封体23之间的密封连接，实现吸引通道的隔断。
进一步地，如图10、图13所示，所述活塞杆上设有引导体31，所述引导体31的外径小于所述上阀壳21的内径。
当活塞3相对于阀壳2滑动时，由于活塞3的活塞杆外径小于上阀壳21的内径，使得活塞3在滑动过程中容易出现偏移的情况。上述方案中，通过在 活塞3的活塞杆上设置引导体31，来解决上述问题。所述引导体31的外径略小于所述上阀壳21的内径。
进一步地，如图3、图11、图12所示，所述弹性套1上设有第四限位槽11，所述上阀壳21上设有第四限位凸起214；当所述弹性套1固定于所述上阀壳21时，所述第四限位凸起214嵌入所述第四限位槽11内。
如前所述，所述弹性套1的材质优选地为塑料材质，其相对于阀壳2具有较低的硬度。因此，再将此种软材质的弹性套1组装到阀壳2上时，容易出现卷边、扭曲变形等问题。上述方案中，通过在弹性套1上设有第四限位槽11，在上阀壳21上设有与第四限位槽11位置及结构相对应的第四限位凸起214，在将弹性套1组装到上阀壳21时，第四限位凸起214嵌入第四限位槽11内，起到限位作用。
本实用新型的另一个实施例，提供了一种内窥镜手柄，包括手柄主体，所述手柄主体上可拆卸的设置有前述的吸引阀组件。
本实用新型的另一个实施例，提供了一种内窥镜，所述内窥镜包括前述的吸引阀组件，或前述的手柄。
在使用上述内窥镜进行吸引操作时，所述吸引阀的密封性更好，正常使用过程中不会出现泄露的情况，
以上所述仅为本实用新型的较佳实施例而已，并不用以限制本实用新型，凡在本实用新型的精神和原则之内所做的任何修改、等同替换和改进等，均应包含在本实用新型的保护范围之内。

Claims (10)

  1. 一种吸引阀组件，其特征在于，包括同轴设置的弹性套(1)、阀壳(2)和活塞(3)；
    所述弹性套(1)的一端固定于所述阀壳(2)上，所述弹性套(1)的另一端与所述活塞(3)抵接，所述活塞(3)可相对于所述阀壳(2)轴向滑动；
    所述阀壳(2)包括上阀壳(21)、下阀壳(22)和密封体(23)，所述密封体(23)位于所述上阀壳(21)和下阀壳(22)之间，所述上阀壳(21)和所述下阀壳(22)可拆卸连接；所述活塞(3)处于第一位置时，所述弹性套(1)提供所述活塞(3)挤压所述密封体(23)的作用力。
  2. 如权利要求1所述的吸引阀组件，其特征在于，所述上阀壳(21)的内壁上设有环状的第一限位槽(211)，所述下阀壳(22)外壁上设有环状的第一限位凸起(221)，所述上阀壳(21)和所述下阀壳(22)连接时，所述第一限位凸起(221)嵌入所述第一限位槽(211)内。
  3. 如权利要求1所述的吸引阀组件，其特征在于，所述上阀壳(21)的外壁上设有沿阀壳(2)轴向方向延伸的第二限位凸起(212)，所述下阀壳(22)的外壁上设有沿阀壳(2)轴向方向延伸的第二限位槽(222)；所述上阀壳(21)和所述下阀壳(22)连接时，所述第二限位凸起(212)嵌入所述第二限位槽(222)内。
  4. 如权利要求1所述的吸引阀组件，其特征在于，所述密封体(23)上设有第三限位槽(231)，所述上阀壳(21)上设有第三限位凸起(213)；所述上阀壳(21)和所述下阀壳(22)连接时，所述第三限位凸起(213)嵌入所述第三限位槽(231)内。
  5. 如权利要求4所述的吸引阀组件，其特征在于，所述下阀壳(22)与所述密封体(23)相接触的端面上设有锥形凸起(223)，所述上阀壳(21)和所述下阀壳(22)连接时，所述锥形凸起(223)挤压所述密封体(23)并使所述密封体(23)的轴向方向发生变形。
  6. 如权利要求1所述的吸引阀组件，其特征在于，所述活塞(3)处于第一位置时，所述活塞(3)挤压所述密封体(23)并使所述密封体(23)产生变形。
  7. 如权利要求2所述的吸引阀组件，其特征在于，所述活塞(3)杆上设有引导体(31)，所述引导体(31)的外径小于所述上阀壳(21)的内径。
  8. 如权利要求1-7所述的吸引阀组件，其特征在于，所述弹性套(1)上设有第四限位槽(11)，所述上阀壳(21)上设有第四限位凸起(214)；所述弹性套(1)固定于所述上阀壳(21)时，所述第四限位凸起(214)嵌入所述第四限位槽(11)内。
  9. 一种内窥镜手柄，其特征在于，包括手柄主体，所述手柄主体上可拆卸的设置有如权利要求1-8之一所述的吸引阀组件。
  10. 一种内窥镜，其特征在于，包括如权利要求1-8所述的吸引阀组件，或包括如权利要求9所述的手柄。
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CN216060451U (zh) * 2021-10-28 2022-03-18 湖南省华芯医疗器械有限公司 一种吸引阀组件及内窥镜

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116616678A (zh) * 2023-07-25 2023-08-22 湖南省华芯医疗器械有限公司 一种吸引阀、内窥镜手柄及内窥镜
CN116616678B (zh) * 2023-07-25 2023-10-20 湖南省华芯医疗器械有限公司 一种吸引阀、内窥镜手柄及内窥镜

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