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CN103721322A - Filtering syringe - Google Patents

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Publication number
CN103721322A
CN103721322A CN201410036208.9A CN201410036208A CN103721322A CN 103721322 A CN103721322 A CN 103721322A CN 201410036208 A CN201410036208 A CN 201410036208A CN 103721322 A CN103721322 A CN 103721322A
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China
Prior art keywords
filter
needle
syringe
needle stand
injection
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Pending
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CN201410036208.9A
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Chinese (zh)
Inventor
李君�
丁文学
夏欣瑞
于红春
赵素霞
苗延国
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Shandong Weigao Group Medical Polymer Co Ltd
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Shandong Weigao Group Medical Polymer Co Ltd
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Priority to CN201410036208.9A priority Critical patent/CN103721322A/en
Publication of CN103721322A publication Critical patent/CN103721322A/en
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Abstract

本发明公开了一种过滤型注射器,包括注射器和过滤注射针,所述注射针由针管和针座组成,针管安装在上针座的前端,下针座的后端连接到注射器的锥头上,下针座的前端与上针座结合形成吸液入口和注射出口,下针座上安装有止回阀,止回阀在吸液入口的吸液方向及注射出口的注射方向打开,注射出口上安装有过滤器。本发明的注射器整体结构简单,操作方便、安全可靠、成本低、一次性使用,可有效降低药物杂质和交叉感染风险。

Figure 201410036208

The invention discloses a filter type syringe, which comprises a syringe and a filter injection needle. The injection needle is composed of a needle tube and a needle seat. , the front end of the lower needle seat is combined with the upper needle seat to form a suction inlet and an injection outlet. A check valve is installed on the lower needle seat. The check valve opens in the suction direction of the suction inlet and the injection direction of the injection outlet, and the injection outlet A filter is installed on it. The syringe of the present invention has the advantages of simple overall structure, convenient operation, safety and reliability, low cost and one-time use, and can effectively reduce drug impurities and the risk of cross-infection.

Figure 201410036208

Description

一种过滤型注射器a filter syringe

技术领域 technical field

本发明涉及注射器,具体地说是一种过滤型注射器。  The invention relates to a syringe, in particular to a filter type syringe. the

背景技术 Background technique

众所周知,目前临床使用的针剂多封装在玻璃瓶中,用注射器的针头扎橡胶塞或用砂轮割破玻璃瓶抽取药液时,瓶塞料屑或玻璃粉末会进入注射液中。传统的注射器不具有过滤功能,抽取液体药物时会将这些杂质抽到注射器内并直接注射给患者,从而诱发静脉炎症等疾病。中国发明专利申请CN102600535A,公开了一种带精密过滤器的注射针,包括针管和具有内通孔的针座,所述针座内通孔包括孔径较小的上部、孔径较大的下部和具有逐渐向上收束缩小孔径结构的中间部,所述针管一端置于所述内通孔的上部,所述针座的内通孔内设有一过滤器。由于该注射针进液通道和出液通道是同一个通道,在过滤后需要再次更换注射针头,但过滤针头和注射针头更换过程中存在被细菌或病毒的污染的风险,同时临床操作也不方便。 As we all know, most of the injections currently used clinically are packaged in glass bottles. When the needle of the syringe is used to pierce the rubber stopper or cut the glass bottle with a grinding wheel to extract the medicinal solution, the bottle stopper chips or glass powder will enter the injection solution. Traditional syringes do not have a filter function. When liquid medicine is drawn, these impurities will be drawn into the syringe and injected directly into the patient, thereby inducing diseases such as venous inflammation. Chinese invention patent application CN102600535A discloses an injection needle with a precision filter, including a needle tube and a needle seat with an inner through hole, and the inner through hole of the needle seat includes an upper part with a smaller aperture, a lower part with a larger aperture, and a needle seat with a The middle part of the narrowing aperture structure is gradually converged upwards, one end of the needle tube is placed on the upper part of the inner through hole, and a filter is arranged in the inner through hole of the needle holder. Since the liquid inlet channel and the liquid outlet channel of the injection needle are the same channel, the injection needle needs to be replaced again after filtration, but there is a risk of contamination by bacteria or viruses during the replacement process of the filter needle and the injection needle, and the clinical operation is also inconvenient .

发明内容 Contents of the invention

本发明的目的是提供一种结构简单、可有效实现过滤功能且注射时无需更换针头的一种过滤型注射器。 The object of the present invention is to provide a filter type syringe with simple structure, which can effectively realize the filter function and does not need to change needles during injection.

本发明的技术方案是:一种过滤型注射器,包括注射器和过滤注射针,所述注射针由针管和针座组成,针管安装在上针座的前端,下针座的后端连接到注射器的锥头上,下针座的前端与上针座结合形成吸液入口和注射出口,下针座上安装有止回阀,止回阀在吸液入口的吸液方向及注射出口的注射方向打开,注射出口上安装有过滤器。 The technical solution of the present invention is: a filter type syringe, including a syringe and a filter injection needle, the injection needle is composed of a needle tube and a needle seat, the needle tube is installed on the front end of the upper needle seat, and the rear end of the lower needle seat is connected to the bottom of the syringe On the cone head, the front end of the lower needle seat is combined with the upper needle seat to form a suction inlet and an injection outlet. A check valve is installed on the lower needle seat, and the check valve is opened in the suction direction of the suction inlet and the injection direction of the injection outlet. , A filter is installed on the injection outlet.

作为一种优选结构,下针座上端的中间部分向上延伸形成圆柱型液体通道,该液体通道成为注射出口,注射出口周围为进液入口,止回阀为伞状结构,止回阀中心有一固定套套在圆柱型液体通道的外面,止回阀伞状顶部与圆柱型液体通道的顶端间形成间隙腔,伞状顶部有一开口,边缘向下延伸形成皮瓣结构。 As a preferred structure, the middle part of the upper end of the lower needle seat extends upwards to form a cylindrical liquid channel, which becomes the injection outlet, and the surrounding of the injection outlet is the liquid inlet. The check valve is an umbrella-shaped structure, and the center of the check valve has a fixed The sleeve is placed on the outside of the cylindrical liquid channel, and a gap cavity is formed between the umbrella-shaped top of the check valve and the top of the cylindrical liquid channel. The umbrella-shaped top has an opening, and the edge extends downward to form a skin flap structure.

所述止回阀采用弹性较好的橡胶材料,优选硅胶材质。 The check valve is made of elastic rubber material, preferably silica gel material.

所述圆柱型液体通道的下端与下针座通过连接座连接,连接座上有孔隙,形成进液入口。 The lower end of the cylindrical liquid channel is connected to the lower needle base through a connecting seat, and there are holes in the connecting seat to form a liquid inlet.

所述圆柱液体通道的底端处的下针座上设有一个环形凹槽,过滤膜焊接在环形凹槽内。 An annular groove is provided on the lower needle seat at the bottom end of the cylindrical liquid channel, and the filter membrane is welded in the annular groove.

本发明的有益效果是:过滤型注射器的过滤和注射过程自动进行,只在注射时过滤药液,抽药时不用过滤,不需要更换针头,避免了细菌和病毒污染的可能性。本发明的自动过滤注射器具有整体结构简单,操作方便、安全可靠、成本低、一次性使用、有效避免交叉感染发生等优点。 The beneficial effect of the invention is that the filtration and injection process of the filter type syringe is carried out automatically, the liquid medicine is only filtered during the injection, and the medicine is not filtered when the medicine is drawn, and the needle does not need to be replaced, thus avoiding the possibility of bacteria and virus contamination. The automatic filter syringe of the present invention has the advantages of simple overall structure, convenient operation, safety and reliability, low cost, disposable use, and effective avoidance of cross-infection.

附图说明 Description of drawings

图1是本发明过滤型注射器的结构示意图。 Fig. 1 is a schematic structural view of the filter type syringe of the present invention.

图2是本发明过滤型注射器的针座的分解结构示意图。 Fig. 2 is a schematic diagram of the exploded structure of the needle seat of the filter type syringe of the present invention.

图3是本发明抽取药液时针座中液体流向示意图。 Fig. 3 is a schematic diagram of the liquid flow in the needle seat when the liquid medicine is extracted according to the present invention.

图4是本发明注射药液时针座中液体流向示意图。 Fig. 4 is a schematic diagram of the liquid flow in the needle holder when injecting the medicinal liquid according to the present invention.

图中1注射器,2锥头,3注射针,4针管,5针座,6上针座,7下针座,8吸液入口,9注射出口,10止回阀,10a固定套,10b伞状顶部,10c皮瓣结构,10d开口,11圆柱型液体通道,12间隙腔,13连接座,14孔隙,15环形凹槽,16过滤膜。 In the figure, 1 syringe, 2 taper head, 3 injection needle, 4 needle tube, 5 needle seat, 6 upper needle seat, 7 lower needle seat, 8 suction inlet, 9 injection outlet, 10 check valve, 10a fixed sleeve, 10b umbrella Shaped top, 10c flap structure, 10d opening, 11 cylindrical liquid channel, 12 gap cavity, 13 connection seat, 14 pores, 15 annular groove, 16 filter membrane.

具体实施方式 Detailed ways

下面结合附图对本发明作进一步描述。 The present invention will be further described below in conjunction with the accompanying drawings.

从图1-图4中可以看出,一种自动过滤注射器,包括注射器1和注射针3,所述注射针3由针管4和针座5组成,针管4安装在上针座6的前端,下针座7的后端连接到注射器1的锥头2上,下针座7的前端与上针座6结合形成吸液入口8和注射出口9,下针座7上安装有止回阀10,止回阀10在吸液入口的吸液方向及注射出口的注射方向打开,注射出口9上安装有过滤器。 As can be seen from Figures 1-4, an automatic filter syringe includes a syringe 1 and an injection needle 3, the injection needle 3 is composed of a needle tube 4 and a needle seat 5, and the needle tube 4 is installed on the front end of the upper needle seat 6, The rear end of the lower needle seat 7 is connected to the cone head 2 of the syringe 1, the front end of the lower needle seat 7 is combined with the upper needle seat 6 to form a suction inlet 8 and an injection outlet 9, and a check valve 10 is installed on the lower needle seat 7 , the check valve 10 is opened in the suction direction of the suction inlet and the injection direction of the injection outlet, and a filter is installed on the injection outlet 9 .

如图2、图3及图4所示,下针座7上端的中间部分向上延伸形成圆柱型液体通道11,该液体通道成为注射出口9,注射出口9周围为进液入口8,止回阀10为伞状结构,止回阀10中心有一固定套10a套在圆柱型液体通道11的外面,止回阀伞状顶部10b与圆柱型液体通道11的顶端间形成间隙腔12,伞状顶部10b有一开口10d,间隙腔12有利于伞状顶部10b产生变形,在抽取药液时封堵开口10d,推注药液时撑开开口10d,边缘向下延伸形成皮瓣结构10c,皮瓣结构10c类似于裙子在的下摆,其内部为固定套10a提供了足够的空间,使得固定套10a与圆柱型液体通道11的外表面贴合面积大,二者贴合紧密,避免注射器中的药液从贴合面通过。皮瓣结构10c可以向固定套10a方向内收,引导吸入的药液顺畅流入注射器。在推注药液时,皮瓣结构10c可以外张,与上针座6内腔壁过盈配合,封堵吸液入口,确保液体经注射出口流出。 As shown in Figure 2, Figure 3 and Figure 4, the middle part of the upper end of the lower needle seat 7 extends upwards to form a cylindrical liquid channel 11, which becomes the injection outlet 9, and the surrounding area of the injection outlet 9 is the liquid inlet 8, check valve 10 is an umbrella-shaped structure, and the center of the check valve 10 has a fixed sleeve 10a set on the outside of the cylindrical liquid passage 11. A gap cavity 12 is formed between the umbrella-shaped top 10b of the check valve and the top end of the cylindrical liquid passage 11, and the umbrella-shaped top 10b There is an opening 10d, the gap cavity 12 is conducive to the deformation of the umbrella-shaped top 10b, the opening 10d is blocked when the medicinal solution is extracted, and the opening 10d is opened when the medicinal solution is injected, and the edge extends downward to form a skin flap structure 10c, the skin flap structure 10c Similar to the hem of a skirt, it provides enough space for the fixing sleeve 10a inside, so that the fixing sleeve 10a and the outer surface of the cylindrical liquid channel 11 have a large bonding area, and the two fit tightly to prevent the liquid medicine in the syringe from flowing Fitted side through. The skin flap structure 10c can be retracted toward the fixing sleeve 10a to guide the inhaled medical solution to flow into the syringe smoothly. When injecting the liquid medicine, the skin flap structure 10c can be stretched outwards to fit in an interference fit with the inner wall of the upper needle holder 6 to block the suction inlet and ensure that the liquid flows out through the injection outlet.

止回阀10采用弹性较好的橡胶材料,优选硅胶材质。硅胶材质弹性大、变形性好,可以满足打开通道和封闭通道的需求。 The check valve 10 is made of elastic rubber material, preferably silicone material. The silicone material has great elasticity and good deformability, which can meet the needs of opening and closing channels.

圆柱液体通道11的底端处的下针座7上设有一个环形凹槽15,过滤膜16焊接在环形凹槽15内。圆柱型液体通道11的下端与下针座通过连接座13连接,连接座上有孔隙14,形成进液入口,连接座13可以如图中所示为十字型的结构,也可以是其他便于连接的结构。 An annular groove 15 is provided on the lower needle seat 7 at the bottom end of the cylindrical liquid channel 11 , and the filter membrane 16 is welded in the annular groove 15 . The lower end of the cylindrical liquid channel 11 is connected to the lower needle seat through a connection seat 13, and there is a hole 14 on the connection seat to form a liquid inlet. The connection seat 13 can be a cross-shaped structure as shown in the figure, or it can be other convenient connection Structure.

如图3所示,止回阀10在抽取药液时,在负压和液体压力作用下,伞边即皮瓣结构10c会收缩形成液体通道,同时伞状顶部10b的开口10d因挤压会封闭,液体经过伞的边缘经连接座上的孔隙14,进入注射器1内;如图4所示,止回阀10在注射药液时,在液体压力作用下,伞边即皮瓣结构10c会张开封死液体通道,伞状顶部10b的开口10d在压力作用下会张开形成液体通道,液体会经过过滤膜16由圆柱液体通道11,经过开口10d进入上针座液体通道内,然后通过针管4进入人体。 As shown in Figure 3, when the check valve 10 extracts the liquid medicine, under the action of negative pressure and liquid pressure, the umbrella edge, that is, the skin flap structure 10c, will shrink to form a liquid channel, and at the same time, the opening 10d of the umbrella-shaped top 10b will shrink due to extrusion. Closed, the liquid enters the syringe 1 through the edge of the umbrella through the hole 14 on the connecting seat; as shown in Figure 4, when the check valve 10 injects the liquid medicine, under the action of the liquid pressure, the edge of the umbrella, that is, the flap structure 10c, will Open and seal the liquid channel, the opening 10d of the umbrella-shaped top 10b will open under pressure to form a liquid channel, the liquid will pass through the filter membrane 16, enter the liquid channel of the upper needle seat through the opening 10d, and then pass through the needle tube 4 into the human body.

Claims (6)

1. a filter-type syringe, comprise syringe and filter entry needle, described entry needle is comprised of needle tubing and needle stand, needle tubing is arranged on the front end of needle stand, the rear end of lower needle stand is connected on the conehead of syringe, it is characterized in that: the front end of lower needle stand is combined with upper needle stand and is formed imbibition entrance and injection outlet, on lower needle stand, check-valves is installed, check-valves is opened in the imbibition direction of imbibition entrance and the injection direction of injection outlet, in injection outlet, filter is installed.
2. filter-type syringe according to claim 1, it is characterized in that: the mid portion of lower needle stand upper end extends upward and forms column type fluid passage, this fluid passage becomes injection outlet, injection outlet is around liquid inlet, check-valves is umbrella-shaped structure, and check-valves center has a fixed cover to be enclosed within the outside of column type fluid passage, between the top of check-valves umbrella top and column type fluid passage, forms spatia, one opening is arranged at umbrella top, and edge extends to form flap structure downwards.
3. filter-type syringe according to claim 1 and 2, is characterized in that: described check-valves adopts resilient elastomeric material to make.
4. filtration syringe according to claim 3, is characterized in that: described check-valves adopts silica gel material to make.
5. filtration syringe according to claim 2, is characterized in that: the lower end of described column type fluid passage is connected by Connection Block with lower needle stand, has hole on Connection Block, forms liquid inlet.
6. filtration syringe according to claim 2, is characterized in that: the lower needle stand at the place, bottom of described cylinder fluid passage is provided with an annular groove, and filter membrane is welded in annular groove.
CN201410036208.9A 2014-01-26 2014-01-26 Filtering syringe Pending CN103721322A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105126207A (en) * 2015-10-16 2015-12-09 江西洪达医疗器械集团有限公司 Precision-filtering injection needle
CN105708693A (en) * 2016-03-30 2016-06-29 王高松 Filter needle for injector
CN106038287A (en) * 2015-04-17 2016-10-26 高钟元 Disposable syringe having safety filter function
CN106390242A (en) * 2016-10-14 2017-02-15 山东威高集团医用高分子制品股份有限公司 Filtering and injection syringe needle
CN106390240A (en) * 2016-10-14 2017-02-15 山东威高集团医用高分子制品股份有限公司 Filtering injection needle
CN108025140A (en) * 2015-11-30 2018-05-11 崔荣哲 Syringe filtering assembly and syringe and transfusion device assembly
CN108295340A (en) * 2018-02-26 2018-07-20 上海振浦医疗设备有限公司 A kind of syringe with fine filtering function
CN108295341A (en) * 2018-03-21 2018-07-20 上海振浦医疗设备有限公司 A kind of syringe of efficient-filtering function

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938513A (en) * 1974-01-03 1976-02-17 Hargest Thomas S Syringe filter and valve combination
US4332249A (en) * 1980-08-01 1982-06-01 Sherwood Medical Industries, Inc. Filter and valve assembly for hypodermic syringe
CN103492009A (en) * 2011-04-08 2014-01-01 佳迈特股份有限公司 Filter needle
CN203694267U (en) * 2014-01-26 2014-07-09 山东威高集团医用高分子制品股份有限公司 Filtration injector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938513A (en) * 1974-01-03 1976-02-17 Hargest Thomas S Syringe filter and valve combination
US4332249A (en) * 1980-08-01 1982-06-01 Sherwood Medical Industries, Inc. Filter and valve assembly for hypodermic syringe
CN103492009A (en) * 2011-04-08 2014-01-01 佳迈特股份有限公司 Filter needle
CN203694267U (en) * 2014-01-26 2014-07-09 山东威高集团医用高分子制品股份有限公司 Filtration injector

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106038287A (en) * 2015-04-17 2016-10-26 高钟元 Disposable syringe having safety filter function
CN106038287B (en) * 2015-04-17 2018-10-19 高钟元 disposable syringe with safety filtering function
CN105126207A (en) * 2015-10-16 2015-12-09 江西洪达医疗器械集团有限公司 Precision-filtering injection needle
CN108025140A (en) * 2015-11-30 2018-05-11 崔荣哲 Syringe filtering assembly and syringe and transfusion device assembly
CN105708693A (en) * 2016-03-30 2016-06-29 王高松 Filter needle for injector
CN106390242A (en) * 2016-10-14 2017-02-15 山东威高集团医用高分子制品股份有限公司 Filtering and injection syringe needle
CN106390240A (en) * 2016-10-14 2017-02-15 山东威高集团医用高分子制品股份有限公司 Filtering injection needle
CN108295340A (en) * 2018-02-26 2018-07-20 上海振浦医疗设备有限公司 A kind of syringe with fine filtering function
CN108295341A (en) * 2018-03-21 2018-07-20 上海振浦医疗设备有限公司 A kind of syringe of efficient-filtering function

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