CN220424297U - Remaining needle with replaceable positive and negative pressure connector - Google Patents

Remaining needle with replaceable positive and negative pressure connector Download PDF

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CN220424297U
CN220424297U CN202321100586.XU CN202321100586U CN220424297U CN 220424297 U CN220424297 U CN 220424297U CN 202321100586 U CN202321100586 U CN 202321100586U CN 220424297 U CN220424297 U CN 220424297U
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negative pressure
pipe
connecting seat
positive
interface
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张平花
赵丽娜
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Henan Provincial Peoples Hospital
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Henan Provincial Peoples Hospital
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Abstract

本实用新型属于医疗器械技术领域,尤其为一种可更换正负压接头的留置针,包括留置针本体,所述留置针本体与延长管一端相连,所述延长管上设置有止流夹,所述延长管另一端与连接座A相连,所述连接座A上设置有外接管、内接管与滑槽一,所述外接管与内接管分别同正压接头、负压接头上所设置的连接座B的外接口及内接口相旋,通过本实用新接型能够对正压接头与负压接头进行安拆更换操作,可便于能够在一次穿刺下,同时满足对患者抽血与输液的两种操作,避免若单独采用两次穿刺的方式,为患者进行抽血与输液操作,则会增加患者痛苦。

The utility model belongs to the technical field of medical devices, and is particularly an indwelling needle with replaceable positive and negative pressure connectors. It includes an indwelling needle body connected to one end of an extension tube, and a flow stop clip is provided on the extension tube. The other end of the extension pipe is connected to the connecting seat A. The connecting seat A is provided with an outer pipe, an inner pipe and a chute. The outer pipe and the inner pipe are the same as those provided on the positive pressure joint and the negative pressure joint respectively. The external interface and the internal interface of the connecting seat B are rotated, and the positive pressure connector and the negative pressure connector can be installed, disassembled, and replaced through the new connection type of the utility model, which can facilitate the patient's blood drawing and infusion in one puncture. The two operations avoid increasing the patient's pain if two punctures are used alone to draw blood and infuse fluids for the patient.

Description

一种可更换正负压接头的留置针A kind of indwelling needle with replaceable positive and negative pressure connectors

技术领域Technical field

本实用新型属于医疗器械技术领域,具体涉及一种可更换正负压接头的留置针。The utility model belongs to the technical field of medical devices, and specifically relates to an indwelling needle with replaceable positive and negative pressure connectors.

背景技术Background technique

留置针多用于输液,以减少反复穿刺而对患者造成的痛苦,同时也便于临床用药,危重患者抢救用药,目前,患者在医院就诊时,部分患者需要先验血,然后再使用留置针进行输液治疗,但是,由于抽血所采用的接头为负压接头,而输液所采用的接头为正压接头,所以导致抽血与穿刺输液需分开进行,只是这样一来,则会增加两次穿刺给患者造成的痛苦。Indwelling needles are mostly used for infusion to reduce the pain caused to patients by repeated punctures. They are also convenient for clinical medication and rescue medication for critically ill patients. Currently, when patients visit the hospital, some patients need to do a blood test first and then use the indwelling needle for infusion. treatment, however, because the connector used for blood drawing is a negative pressure connector, and the connector used for infusion is a positive pressure connector, so blood drawing and puncture infusion need to be performed separately. However, in this way, two more punctures will be added to the treatment. The pain caused to the patient.

实用新型内容Utility model content

针对以上问题,本实用新型的目的在于:提供一种可更换正负压接头的留置针,解决抽血与输液需两次穿刺的问题。In view of the above problems, the purpose of this utility model is to provide an indwelling needle with replaceable positive and negative pressure connectors to solve the problem of requiring two punctures for blood drawing and infusion.

为实现以上目的,本实用新型采用的技术方案:一种可更换正负压接头的留置针,包括留置针本体,所述留置针本体与延长管一端相连,所述延长管上设置有止流夹,所述延长管另一端与连接座A相连,所述连接座A上设置有外接管、内接管与滑槽一,所述外接管与内接管分别同正压接头、负压接头上所设置的连接座B的外接口及内接口相旋。In order to achieve the above purpose, the technical solution adopted by this utility model is: an indwelling needle with replaceable positive and negative pressure connectors, including an indwelling needle body connected to one end of an extension tube, and a flow stop is provided on the extension tube. Clamp, the other end of the extension pipe is connected to the connecting seat A. The connecting seat A is provided with an outer pipe, an inner pipe and a chute. The outer pipe and the inner pipe are the same as those on the positive pressure joint and the negative pressure joint respectively. The external interface and the internal interface of the set connecting base B are rotated.

本实用新型的有益效果为:通过本实用新接型能够对正压接头与负压接头进行安拆更换操作,可便于能够在一次穿刺下,同时满足对患者抽血与输液的两种操作,避免若单独采用两次穿刺的方式,为患者进行抽血与输液操作,则会增加患者痛苦。The beneficial effects of the utility model are: the positive pressure joint and the negative pressure joint can be installed, disassembled and replaced through the new connection type of the utility model, which can facilitate the two operations of blood drawing and infusion for the patient in one puncture. Avoid using two separate punctures to draw blood and infuse blood for the patient, which will increase the patient's pain.

为了便于同连接座B上所设置的外接口与内接口相旋接:In order to facilitate the screw connection between the external interface and the internal interface set on the connection base B:

作为上述技术方案的进一步改进:所述外接管与内接管皆设置于远离延长管连接端的连接座A另一端侧壁上,且外接管位于内接管外圈。As a further improvement of the above technical solution: the outer pipe and the inner pipe are both arranged on the other end side wall of the connecting seat A away from the connection end of the extension pipe, and the outer pipe is located on the outer ring of the inner pipe.

本改进的有益效果为:通过外接管与内接管的设立,可便于同连接座B上所设置的外接口与内接口相旋接。The beneficial effect of this improvement is that through the establishment of the external pipe and the internal pipe, the external interface and the internal interface provided on the connection base B can be easily connected to each other.

为了便于增加连接座A与连接座B连接的紧密性:In order to increase the tightness of the connection between connecting base A and connecting base B:

作为上述技术方案的进一步改进:所述外接口、内接口在连接座B上的设置位置与外接管、内接管在连接座A上的设置位置相同,且外接管经由其外壁与内壁螺纹同外接口顶壁与底壁螺纹相旋接,而内接管则经由其外壁螺纹与内接口顶壁螺纹相旋接。As a further improvement of the above technical solution: the external interface and the internal interface are arranged at the same position on the connection base B as the external pipe and the inner pipe are installed on the connection base A, and the outer pipe and the inner wall thread are the same as the outer pipe through its outer wall. The top wall of the interface is screwed to the threads of the bottom wall, and the inner nozzle is screwed to the threads of the top wall of the inner interface through its outer wall threads.

本改进的有益效果为:通过外接管经由其外壁与内壁螺纹同外接口顶壁与底壁螺纹相旋接,而内接管则经由其外壁螺纹与内接口顶壁螺纹相旋接,可便于增加连接座A与连接座B连接的紧密性。The beneficial effects of this improvement are: the outer pipe is screwed to the top wall and bottom wall threads of the outer interface through its outer wall and inner wall threads, and the inner pipe is screwed to the top wall threads of the inner interface through its outer wall threads, making it easy to increase the number of pipes. The tightness of the connection between connector A and connector B.

为了增加连接的密封性:To increase the tightness of the connection:

作为上述技术方案的进一步改进:所述外接口内端设置有密封胶圈。As a further improvement of the above technical solution: the inner end of the external interface is provided with a sealing rubber ring.

本改进的有益效果为:通过外接口内端密封胶圈的设立,可便于增加连接的密封性,从而有效防止液体向外渗出。The beneficial effect of this improvement is: through the establishment of the sealing rubber ring at the inner end of the external interface, the sealing performance of the connection can be easily increased, thereby effectively preventing liquid from leaking out.

为了便于对安装座使用位置进行移动调节:In order to facilitate the movement and adjustment of the mounting base:

作为上述技术方案的进一步改进:所述滑槽一设置于近外接管与内接管设置端的连接座A外壁上,且滑槽一中设置有安装座,并与安装座为滑动连接。As a further improvement of the above technical solution: the chute one is provided on the outer wall of the connecting seat A near the end of the outer pipe and the inner pipe, and a mounting seat is provided in the chute one and is slidingly connected to the mounting seat.

本改进的有益效果为:通过安装座设置于滑槽一中,并与滑槽一为滑动连接,可便于能够对安装座使用位置进行移动调节。The beneficial effect of this improvement is that by disposing the mounting base in the first chute and being slidingly connected to the first chute, the usage position of the mounting base can be easily moved and adjusted.

为了便于对扣件A的使用位置进行移动调节:In order to facilitate the movement and adjustment of the use position of fastener A:

作为上述技术方案的进一步改进:所述安装座上设置有滑块,且滑块位于扣件A底端所横向设置的滑槽二中,并与滑槽二为滑动连接。As a further improvement of the above technical solution: the mounting base is provided with a slider, and the slider is located in the second chute arranged transversely at the bottom end of the fastener A, and is slidingly connected with the second chute.

本改进的有益效果为:通过安装座上所设置的滑块与扣件A底端的滑槽二为滑动连接,可便于对扣件A的使用位置进行移动调节。The beneficial effect of this improvement is that the sliding block provided on the mounting base and the second chute at the bottom of fastener A are slidingly connected, making it easy to move and adjust the use position of fastener A.

为了进一步增加连接座A与连接座B连接的稳定性:In order to further increase the stability of the connection between connector A and connector B:

作为上述技术方案的进一步改进:所述连接座B近外接口与内接口设置端的外壁上设置有扣件B,且扣件B与扣件A为扣合连接。As a further improvement of the above technical solution: a fastener B is provided on the outer wall of the connecting seat B near the end of the external interface and the internal interface, and the fastener B and the fastener A are connected in a snap-fit manner.

本改进的有益效果为:通过连接座A与连接座B经由外接管同外接口的旋接、内接管同内接口的旋接相连后,只需先移动安装座,令扣件A与扣件B左右相对,再横向将扣件A向扣件B方向移动,令扣件A与扣件B扣合连接,即可进一步增加连接座A与连接座B连接的稳定性。The beneficial effect of this improvement is: after the connection base A and the connection base B are connected through the rotation of the external pipe and the external interface, and the rotation of the internal pipe and the internal interface, it is only necessary to move the mounting base first, so that the fastener A and the fastener B faces left and right, and then moves fastener A laterally toward fastener B so that fastener A and fastener B are connected, which can further increase the stability of the connection between connecting base A and connecting base B.

为了便于对延长管进行夹闭:To facilitate clamping of the extension tube:

作为上述技术方案的进一步改进:所述止流夹设置于延长管外端。As a further improvement of the above technical solution: the flow stop clip is provided at the outer end of the extension tube.

本改进的有益效果为:通过止流夹的设立,可便于能够在更换正压接头或负压接头时,对延长管进行夹闭操作。The beneficial effect of this improvement is that through the establishment of the flow stop clamp, the extension pipe can be easily clamped when replacing the positive pressure connector or the negative pressure connector.

附图说明Description of the drawings

图1为本实用新型的正压接头安装使用状态结构示意图;Figure 1 is a schematic structural diagram of the positive pressure joint of the present utility model in its installation and use state;

图2为本实用新型的负压接头拆分结构示意图;Figure 2 is a schematic diagram of the disassembled structure of the negative pressure joint of the present utility model;

图3为本实用新型的连接座A与连接座B侧端剖视图;Figure 3 is a side cross-sectional view of the connection base A and the connection base B of the present invention;

图4为本实用新型的图1A处部分放大图;Figure 4 is a partially enlarged view of Figure 1A of the present utility model;

图5为本实用新型的图2B处部分放大图;Figure 5 is a partially enlarged view of Figure 2B of the present invention;

图6为本实用新型的图3C处部分放大图;Figure 6 is a partially enlarged view of Figure 3C of the present invention;

图中:1、留置针本体;2、延长管;3、止流夹;4、连接座A;5、外接管;6、内接管;7、滑槽一;8、正压接头;9、负压接头;10、连接座B;11、外接口;12、内接口;13、密封胶圈;14、安装座;15、滑块;16、扣件A;17、滑槽二;18、扣件B。In the picture: 1. Indwelling needle body; 2. Extension tube; 3. Stopper clamp; 4. Connecting seat A; 5. External connecting tube; 6. Internal connecting tube; 7. Chute 1; 8. Positive pressure connector; 9. Negative pressure joint; 10. Connection seat B; 11. External interface; 12. Internal interface; 13. Sealing rubber ring; 14. Mounting seat; 15. Slider; 16. Fastener A; 17. Slide 2; 18. Fastener B.

具体实施方式Detailed ways

为了使本领域技术人员更好地理解本实用新型的技术方案,下面结合附图对本实用新型进行详细描述,本部分的描述仅是示范性和解释性,不应对本实用新型的保护范围有任何的限制作用。In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any influence on the protection scope of the present utility model. limiting effect.

如图1-6所示,一种可更换正负压接头的留置针,包括留置针本体1,所述留置针本体1与延长管2一端相连,所述延长管2上设置有止流夹3,所述延长管2另一端与连接座A4相连,所述连接座A4上设置有外接管5、内接管6与滑槽一7,所述外接管5与内接管6分别同正压接头8、负压接头9上所设置的连接座B10的外接口11及内接口12相旋,通过本实用新接型能够对正压接头8与负压接头9进行安拆更换操作,可便于能够在一次穿刺下,同时满足对患者抽血与输液的两种操作,避免若单独采用两次穿刺的方式,为患者进行抽血与输液操作,则会增加患者痛苦,所述外接管5与内接管6皆设置于远离延长管2连接端的连接座A4另一端侧壁上,且外接管5位于内接管6外圈,通过外接管5与内接管6的设立,可便于同连接座B10上所设置的外接口11与内接口12相旋接,所述外接口11、内接口12在连接座B10上的设置位置与外接管5、内接管6在连接座A4上的设置位置相同,且外接管5经由其外壁与内壁螺纹同外接口11顶壁与底壁螺纹相旋接,而内接管6则经由其外壁螺纹与内接口12顶壁螺纹相旋接,通过外接管5经由其外壁与内壁螺纹同外接口11顶壁与底壁螺纹相旋接,而内接管6则经由其外壁螺纹与内接口12顶壁螺纹相旋接,可便于增加连接座A4与连接座B10连接的紧密性,所述外接口11内端设置有密封胶圈13,通过外接口11内端密封胶圈13的设立,可便于增加连接的密封性,从而有效防止液体向外渗出,所述滑槽一7设置于近外接管5与内接管6设置端的连接座A4外壁上,且滑槽一7中设置有安装座14,并与安装座14为滑动连接,通过安装座14设置于滑槽一7中,并与滑槽一7为滑动连接,可便于能够对安装座14使用位置进行移动调节,所述安装座14上设置有滑块15,且滑块15位于扣件A16底端所横向设置的滑槽二17中,并与滑槽二17为滑动连接,通过安装座14上所设置的滑块15与扣件A16底端的滑槽二17为滑动连接,可便于对扣件A16的使用位置进行移动调节,所述连接座B10近外接口11与内接口12设置端的外壁上设置有扣件B18,且扣件B18与扣件A16为扣合连接,通过连接座A4与连接座B10经由外接管5同外接口11的旋接、内接管6同内接口12的旋接相连后,只需先移动安装座14,令扣件A16与扣件B18左右相对,再横向将扣件A16向扣件B18方向移动,令扣件A16与扣件B18扣合连接,即可进一步增加连接座A4与连接座B10连接的稳定性,所述止流夹3设置于延长管2外端,通过止流夹3的设立,可便于能够在更换正压接头8或负压接头9时,对延长管2进行夹闭操作。As shown in Figure 1-6, an indwelling needle with replaceable positive and negative pressure connectors includes an indwelling needle body 1. The indwelling needle body 1 is connected to one end of an extension tube 2. The extension tube 2 is provided with a flow stop clip. 3. The other end of the extension pipe 2 is connected to the connection base A4. The connection base A4 is provided with an outer pipe 5, an inner pipe 6 and a chute 7. The outer pipe 5 and the inner pipe 6 are respectively the same as the positive pressure joints. 8. The external interface 11 and the internal interface 12 of the connecting seat B10 provided on the negative pressure connector 9 rotate with each other. Through the new connection type of this utility model, the positive pressure connector 8 and the negative pressure connector 9 can be installed, disassembled and replaced, which is convenient. Under one puncture, the two operations of blood drawing and infusion for the patient can be satisfied at the same time. If two punctures are used alone to draw blood and infusion for the patient, it will increase the patient's pain. The external tube 5 and the internal tube 5 The nozzles 6 are arranged on the other side wall of the connection seat A4 away from the connection end of the extension pipe 2, and the outer nozzle 5 is located on the outer ring of the inner nozzle 6. The external interface 11 and the internal interface 12 are arranged to be screwed together. The external interface 11 and the internal interface 12 are arranged in the same position on the connection base B10 as the external pipe 5 and the internal pipe 6 are installed on the connection base A4, and the external interface 11 and the internal interface 12 are arranged in the same position on the connection base B10. The nozzle 5 is screwed to the top wall and bottom wall of the outer interface 11 via its outer wall and inner wall threads, while the inner nozzle 6 is screwed to the top wall thread of the inner interface 12 via its outer wall threads. The inner wall threads are screwed to the top wall and bottom wall threads of the outer interface 11, and the inner nozzle 6 is screwed to the top wall threads of the inner interface 12 through its outer wall threads, which can easily increase the tightness of the connection between the connecting seat A4 and the connecting seat B10. , The inner end of the outer interface 11 is provided with a sealing rubber ring 13. Through the establishment of the sealing rubber ring 13 at the inner end of the outer interface 11, the sealing performance of the connection can be easily increased, thereby effectively preventing liquid from leaking out. The chute has a 7 is arranged on the outer wall of the connecting seat A4 near the end of the outer pipe 5 and the inner pipe 6, and a mounting base 14 is provided in the chute 7, and is slidingly connected to the mounting base 14, and is arranged in the chute 7 through the mounting base 14 , and is slidingly connected with the chute 17, which can facilitate the movement and adjustment of the use position of the mounting base 14. The mounting base 14 is provided with a slider 15, and the slider 15 is located transversely at the bottom of the fastener A16 The slider 15 provided on the mounting base 14 is in sliding connection with the slider 17 at the bottom of the fastener A16, which facilitates the use of the fastener A16. The position is moved and adjusted. A fastener B18 is provided on the outer wall of the connecting seat B10 near the end of the external interface 11 and the internal interface 12, and the fastener B18 and the fastener A16 are connected through a snap connection. The connecting seat A4 and the connecting seat B10 are connected through After the outer pipe 5 is connected to the outer interface 11 and the inner pipe 6 is connected to the inner interface 12, you only need to move the mounting base 14 first so that the fastener A16 and the fastener B18 are opposite to each other, and then move the fastener A16 laterally. The fastener B18 moves in the direction, so that the fastener A16 and the fastener B18 are connected, which can further increase the stability of the connection between the connection base A4 and the connection base B10. The flow stop clip 3 is provided at the outer end of the extension tube 2, and passes through the stopper. The establishment of the flow clamp 3 facilitates the clamping operation of the extension tube 2 when replacing the positive pressure connector 8 or the negative pressure connector 9 .

本实用新型的工作原理为:当外接管5经由其外壁与内壁螺纹同外接口11顶壁与底壁螺纹相旋接、内接管6经由其外壁螺纹与内接口12顶壁螺纹相旋接后,完成连接座A4与连接座B10的初步连接操作时,即能够先移动安装座14,令扣件A16与扣件B18左右相对,再横向将扣件A16向扣件B18方向移动,令扣件A16与扣件B18扣合连接,即可对连接座A4与连接座B10进一步连接固定,从而以便增加正压接头8或负压接头9安装使用过程的稳定性,同理反向操作,即能够对正压接头8或负压接头9进行拆卸更换操作,通过外接口11内端密封胶圈13的设立,可便于增加连接的密封性,从而有效防止液体向外渗出,通过止流夹3的设立,可便于能够在更换正压接头8或负压接头9时,对延长管2进行夹闭操作。The working principle of the utility model is: when the outer pipe 5 is screwed to the top wall and bottom wall of the outer interface 11 through its outer wall and inner wall threads, and the inner pipe 6 is screwed to the top wall of the inner interface 12 through its outer wall threads, , when the preliminary connection operation of the connecting base A4 and the connecting base B10 is completed, the mounting base 14 can be moved first so that the fastener A16 and the fastener B18 are opposite to each other, and then the fastener A16 is laterally moved in the direction of the fastener B18, so that the fastener A16 and fastener B18 are fastened and connected, and the connection base A4 and the connection base B10 can be further connected and fixed, thereby increasing the stability of the installation and use of the positive pressure connector 8 or the negative pressure connector 9. In the same way, the reverse operation can be performed. When disassembling and replacing the positive pressure connector 8 or the negative pressure connector 9, the establishment of the sealing rubber ring 13 at the inner end of the external interface 11 can easily increase the sealing performance of the connection, thereby effectively preventing liquid from leaking out. Through the flow stop clamp 3 The establishment of can facilitate the clamping operation of the extension tube 2 when replacing the positive pressure connector 8 or the negative pressure connector 9.

需要说明的是,在本文中,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。It should be noted that, as used herein, the terms "include", "comprises" or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or equipment.

本文中应用了具体个例对本实用新型的原理及实施方式进行了阐述,以上实例的说明只是用于帮助理解本实用新型的方法及其核心思想。以上所述仅是本实用新型的优选实施方式,应当指出,由于文字表达的有限性,客观上存在无限的具体结构,对于本技术领域的普通技术人员来说,在不脱离本实用新型原理的前提下,还可以做出若干改进、润饰或变化,也可以将上述技术特征以适当的方式进行组合;这些改进润饰、变化或组合,或未经改进将本实用新型的构思和技术方案直接应用于其它场合的,均应视为本实用新型的保护范围。This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and the core idea of the present invention. The above are only the preferred embodiments of the present utility model. It should be pointed out that due to the limitation of written expressions, there are objectively unlimited specific structures. For those of ordinary skill in the art, without departing from the principles of the present utility model, Under the premise, several improvements, modifications or changes can also be made, or the above technical features can be combined in an appropriate manner; these improvements, modifications or combinations, or the concepts and technical solutions of the present utility model can be directly applied without improvement. In other situations, it should be regarded as the protection scope of the present utility model.

Claims (8)

1. The utility model provides a removable positive negative pressure connects's needle of keeping somewhere, includes needle body (1) of keeping somewhere, needle body (1) link to each other with extension pipe (2) one end, be provided with on extension pipe (2) and flow stopping clamp (3), its characterized in that: the extension pipe (2) other end links to each other with connecting seat A (4), be provided with outer takeover (5), inscription pipe (6) and spout one (7) on connecting seat A (4), outer joint (11) and inscription pipe (6) are with positive pressure joint (8), respectively on negative pressure joint (9) set up connecting seat B (10) outer joint (11) and inscription (12) mutually revolve.
2. The interchangeable positive and negative pressure coupling retention needle of claim 1 wherein: the external connection pipe (5) and the internal connection pipe (6) are arranged on the side wall of the other end of the connecting seat A (4) far away from the connecting end of the extension pipe (2), and the external connection pipe (5) is positioned on the outer ring of the internal connection pipe (6).
3. The interchangeable positive and negative pressure coupling retention needle of claim 1 wherein: the arrangement positions of the outer interface (11) and the inner interface (12) on the connecting seat B (10) are the same as the arrangement positions of the outer connecting tube (5) and the inner connecting tube (6) on the connecting seat A (4), the outer connecting tube (5) is screwed with the top wall and the bottom wall of the outer interface (11) through the outer wall and the inner wall threads of the outer connecting tube, and the inner connecting tube (6) is screwed with the top wall threads of the inner connecting tube (12) through the outer wall threads of the inner connecting tube.
4. The interchangeable positive and negative pressure coupling retention needle of claim 1 wherein: the inner end of the outer interface (11) is provided with a sealing rubber ring (13).
5. The interchangeable positive and negative pressure coupling retention needle of claim 1 wherein: the first sliding chute (7) is arranged on the outer wall of the connecting seat A (4) close to the arrangement end of the outer tube (5) and the inner tube (6), and the first sliding chute (7) is internally provided with a mounting seat (14) and is in sliding connection with the mounting seat (14).
6. The interchangeable positive and negative pressure coupling retention needle of claim 5 wherein: the mounting seat (14) is provided with a sliding block (15), and the sliding block (15) is positioned in a second sliding groove (17) transversely arranged at the bottom end of the fastener A (16) and is in sliding connection with the second sliding groove (17).
7. The interchangeable positive and negative pressure coupling retention needle of claim 1 wherein: the connecting seat B (10) is provided with a fastener B (18) near the outer interface (11) and the outer wall of the installation end of the inner interface (12), and the fastener B (18) is in buckling connection with the fastener A (16).
8. The interchangeable positive and negative pressure coupling retention needle of claim 1 wherein: the flow stopping clamp (3) is arranged at the outer end of the extension tube (2).
CN202321100586.XU 2023-05-09 2023-05-09 Remaining needle with replaceable positive and negative pressure connector Active CN220424297U (en)

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Application Number Priority Date Filing Date Title
CN202321100586.XU CN220424297U (en) 2023-05-09 2023-05-09 Remaining needle with replaceable positive and negative pressure connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321100586.XU CN220424297U (en) 2023-05-09 2023-05-09 Remaining needle with replaceable positive and negative pressure connector

Publications (1)

Publication Number Publication Date
CN220424297U true CN220424297U (en) 2024-02-02

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Country Link
CN (1) CN220424297U (en)

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