TWM599660U - syringe - Google Patents

Abstract

Translated fromChinese

本創作係在提供一種注射器，主要係設有一針管部，該針管部之底部設有一下定位座，該針管部之頂部設有一上定位座，該上定位座之上方設有一壓縮部，該壓縮部上方設有一按壓部，一針頭係固設於該上定位座上並位於該壓縮部內，該針頭之針尖並位於該按壓部之穿刺面下方，該下定位座之內壁面上設有一上凸緣及一下凸緣，該上定位座之外壁面上設有一上環槽及一下環槽，該上定位座與該下定位座之間設有數個相互套接之伸縮定位環，該伸縮定位環係罩設於該針管部之外部，該伸縮定位環上係設有供相互嵌設之定位凸體與定位凹槽，如此，藉由該針管部外的伸縮定位環之設計，可依被注射者所需的藥劑量進行分段式之注射，使注射藥劑更具便利性。This creation is to provide a syringe, which is mainly provided with a needle tube part, the bottom of the needle tube part is provided with a lower positioning seat, the top of the needle tube part is provided with an upper positioning seat, and the upper positioning seat is provided with a compression part. A pressing part is arranged above the upper part, a needle is fixed on the upper positioning base and located in the compressing part, the needle tip of the needle is located below the puncture surface of the pressing part, and an upper protrusion is provided on the inner wall of the lower positioning base The outer wall of the upper positioning seat is provided with an upper ring groove and a lower ring groove, and a plurality of telescopic positioning rings are sleeved between the upper positioning seat and the lower positioning seat. The telescopic positioning ring is The cover is set on the outside of the needle tube part, and the telescopic positioning ring is provided with positioning protrusions and positioning grooves for mutual embedding. In this way, the design of the telescopic positioning ring outside the needle tube part can be adapted to the person being injected The required dose of medicine is injected in segments, which makes the injection of medicine more convenient.

Description

Translated fromChinese

注射器syringe

本創作係有關於一種注射器，特別是指一種可依被注射者所需的藥劑量進行分段式之注射，使注射藥劑更具便利性。This creation is about a syringe, especially a segmented injection that can be injected according to the dose required by the person to be injected, making the injection of drugs more convenient.

按，一般醫療用之注射針筒，主要係設有一針筒、一推桿及一針頭所組成，而習知的注射針筒在要注射藥劑之前，須先將針頭組設於針筒上，再以針頭插設入藥劑瓶內，藉由抽拉插設於針筒內的推桿，利用針頭將藥劑吸引入針筒內，再將針頭插入病患身上並藉由壓持推桿將針筒內的藥劑擠壓注射入病患身體內，才可完成藥劑之注射，然，習知之注射針筒，在注射藥劑之操作過程較為麻煩，且由於針頭具有細長之針體，在使用過程中，醫護人員容易發生被針扎傷的意外，故大都會於針頭上套設一針頭套來避免針扎之意外，但常因在注射完藥劑後，針頭套欲套回針頭上時，仍有不小心被注射針頭扎傷而有遭受病毒感染的風險之虞，且習知之注射針筒及針頭套等之使用量，造成大量的醫療廢棄物產生，醫療廢棄物之處理費用極為龐大。According to the general medical injection syringe, it is mainly composed of a syringe, a push rod and a needle. The conventional injection syringe must be set on the syringe before the injection of medicine. Then insert the needle into the medicament bottle, pull the push rod inserted in the syringe, use the needle to attract the medicine into the syringe, then insert the needle into the patient and hold the push rod to hold the needle The medicine in the barrel is squeezed and injected into the patient's body to complete the injection of the medicine. However, the conventional injection syringe is more troublesome in the process of injecting the medicine, and because the needle has a slender needle body, it is in use during use. Medical personnel are prone to accidents caused by needle stick injuries. Therefore, most people put a needle cover on the needle to avoid needle stick accidents. However, it is often because the needle cover is about to be put back on the needle after the injection of the medicine. Accidentally being stabbed by an injection needle may cause a risk of viral infection, and the use of conventional injection syringes and needle covers, etc., causes a large amount of medical waste to be generated, and the cost of medical waste treatment is extremely large.

本創作之主要目的，係在提供一種注射器，可有效解決注射針筒在使用時之缺失。The main purpose of this creation is to provide a syringe that can effectively solve the lack of injection syringes in use.

本創作之注射器，主要係設有一針管部，該針管部係設為蛇腹型，該針管部之底部設有一下定位座，該下定位座設有一凸體，該針管部之頂部設有一上定位座，該上定位座上設有一穿孔，該上定位座之底面設有一固定座，該固定座內設有一凹槽，該固定座之底緣設有數個連通於該凹槽之導引槽，該上定位座之頂緣上設有定位卡塊，該上定位座之上方設有一壓縮部，該壓縮部係設為錐狀之蛇腹型，該壓縮部之上方設有一按壓部，該按壓部中間部位設為穿刺面，該按壓部之兩側延伸設有一扣持片，該扣持片之底面設有供與該上定位座之該定位卡塊相互卡設之卡勾，一針頭係固設於該上定位座之穿孔上，該針頭之底端係連通於該固定座之凹槽內，該針頭並位於該壓縮部內，該針頭之針尖並位於該按壓部之穿刺面下方； 其特徵係在：該下定位座之內壁面上設有一上凸緣及一下凸緣，該上定位座之外壁面上設有一上環槽及一下環槽，該上定位座與該下定位座之間設有數個相互套接之伸縮定位環，該伸縮定位環係罩設於該針管部之外部，該伸縮定位環上係設有供相互嵌設之定位凸體與定位凹槽。The syringe of this creation is mainly provided with a needle tube part, the needle tube part is made of bellows, the bottom of the needle tube part is provided with a lower positioning seat, the lower positioning seat is provided with a convex body, and the top of the needle tube part is provided with an upper positioning seat Seat, the upper positioning seat is provided with a perforation, the bottom surface of the upper positioning seat is provided with a fixing seat, the fixing seat is provided with a groove, and the bottom edge of the fixing seat is provided with a plurality of guiding grooves communicating with the groove, A positioning block is arranged on the top edge of the upper positioning seat, a compression part is arranged above the upper positioning seat, and the compression part is set in a cone-shaped bellows shape. A pressing part is arranged above the compression part, and the pressing part The middle part is set as the puncture surface, the two sides of the pressing part are extended with a buckle piece, the bottom surface of the buckle piece is provided with a hook for interlocking with the positioning block of the upper positioning seat, and a needle is secured Set on the perforation of the upper positioning base, the bottom end of the needle is connected to the groove of the fixing base, the needle is located in the compression part, and the needle tip of the needle is located below the piercing surface of the pressing part; It is characterized in that: the inner wall of the lower positioning seat is provided with an upper flange and a lower flange, the outer wall of the upper positioning seat is provided with an upper ring groove and a lower ring groove, the upper positioning seat and the lower positioning seat are A number of telescopic positioning rings sleeved in between are arranged, the telescopic positioning ring is arranged outside the needle tube part, and the telescopic positioning ring is provided with positioning protrusions and positioning grooves for mutual embedding.

本創作之注射器，其優點係在：將針頭、針管及藥劑設為一體式，可提供醫療人員在使用注射針筒之安全性，而無須設置針頭套，即可將針頭收回隱藏於注射針筒內，可防止被針扎之危險性，並可減少醫療廢棄物之產生量，降低醫療廢棄物之處理費用，且藉由針管部外的伸縮定位環之設計，可依被注射者所需的藥劑量進行分段式之注射，使注射藥劑更具便利性。The advantages of the syringe of this creation are: the needle, the needle tube and the medicament are integrated, which can provide the safety of the medical staff in the use of the syringe, and the needle can be retracted and hidden in the syringe without the need for a needle cover Inside, it can prevent the danger of needle sticks, reduce the amount of medical waste generated, and reduce the cost of medical waste treatment. With the design of the telescopic positioning ring outside the needle tube, it can be in accordance with the needs of the person being injected The dose of medicine is injected in segments, which makes the injection of medicine more convenient.

有關本創作為達上述之使用目的與功效，所採用之技術手段，茲舉出較佳可行之實施例，並配合圖式所示，詳述如下：Regarding the technical means used in this creation to achieve the above-mentioned purposes and effects, a preferred and feasible embodiment is presented, as shown in the drawings, and the details are as follows:

本創作之實施例，請參閱第一、二圖所示，注射器1主要係設有一針管部10，該針管部10係設為蛇腹型，該針管部10之底部設有一下定位座11，該下定位座11設有一凸體110，該下定位座11之內壁面上設有一上凸緣111及一下凸緣112，該針管部10之頂部設有一上定位座12，該上定位座12上設有一穿孔120，該上定位座12之底面設有一固定座121，該固定座121內設有一凹槽122，該固定座121之底緣設有數個連通於該凹槽122之導引槽123，該上定位座12之頂緣上設有定位卡塊124，該上定位座12之外壁面上設有一上環槽125及一下環槽126，該上定位座12與該下定位座11之間設有數個相互套接之伸縮定位環13，該伸縮定位環13係罩設於該針管部10之外部，該伸縮定位環13上係設有供相互嵌設之定位凸體130與定位凹槽131，該上定位座12之上方設有一壓縮部14，該壓縮部14係設為錐狀之蛇腹型，該壓縮部14之上方設有一按壓部15，該按壓部15中間部位設為穿刺面150，該按壓部15之兩側延伸設有一扣持片151，該扣持片151之底面設有供與該上定位座12之該定位卡塊124相互卡設之卡勾152，一針頭16係固設於該上定位座12之穿孔120上，該針頭16之底端係連通於該固定座121之凹槽122內，該針頭16並位於該壓縮部14內，該針頭16之針尖160並位於該按壓部15之穿刺面150下方，該針管部10內注入有藥劑A，如此，即為一注射器結構。For the embodiment of this creation, please refer to the first and second figures. The syringe 1 is mainly provided with aneedle tube portion 10, which is set in a bellows shape, and the bottom of theneedle tube portion 10 is provided with apositioning seat 11, which Thelower positioning seat 11 is provided with aconvex body 110, the inner wall of thelower positioning seat 11 is provided with anupper flange 111 and alower flange 112, the top of theneedle tube portion 10 is provided with anupper positioning seat 12, and theupper positioning seat 12 is Aperforation 120 is provided. The bottom surface of theupper positioning base 12 is provided with afixing base 121, thefixing base 121 is provided with agroove 122, and the bottom edge of thefixing base 121 is provided with a plurality of guidinggrooves 123 connected to thegroove 122 , The top edge of theupper positioning seat 12 is provided with apositioning block 124, the outer wall of theupper positioning seat 12 is provided with anupper ring groove 125 and alower ring groove 126, between theupper positioning seat 12 and thelower positioning seat 11 There are severaltelescopic positioning rings 13 sleeved with each other. Thetelescopic positioning ring 13 is arranged outside theneedle tube portion 10, and thetelescopic positioning ring 13 is provided withpositioning protrusions 130 and positioning grooves formutual embedding 131. Acompression portion 14 is provided above theupper positioning seat 12, and thecompression portion 14 is set in a cone-shaped accordion shape. Apressing portion 15 is provided above thecompression portion 14, and the middle portion of thepressing portion 15 is set as apiercing surface 150. Abuckle piece 151 is extended on both sides of thepressing portion 15. The bottom surface of thebuckle piece 151 is provided with ahook 152 for interlocking with thepositioning block 124 of theupper positioning seat 12, and aneedle 16 Theneedle 16 is fixed on the throughhole 120 of theupper positioning base 12, the bottom end of theneedle 16 is connected to thegroove 122 of thefixing base 121, theneedle 16 is located in thecompression part 14, and theneedle point 160 of theneedle 16 And located below thepuncture surface 150 of thepressing portion 15, theneedle tube portion 10 is injected with the medicine A, so that it is a syringe structure.

本創作使用時，請參閱第三～八圖所示，醫護人員僅需以大拇指支撐於針管部10之底部，將兩手指扣持住按壓部15之扣持片151上（如第三圖所示），按壓扣持片151及針管部10底部之下定位座11，使按壓部15擠壓壓縮部14並向上定位座12靠移，而位於壓縮部14內的針頭16之針尖160則將按壓部15之穿刺面150刺穿而穿伸出，同時，錐狀之蛇腹型的壓縮部14受按壓部15之擠壓而壓縮成收合狀態，其上定位座12之定位卡塊124則卡設於扣持片151底部之卡勾152內，將按壓部15定位於上定位座12上不會鬆開（如第四、五圖所示），如此，即可對病患進行藥劑注射，將凸伸出按壓部15之穿刺面150上的針頭16之針尖160插入病患的身體內後，再將針管部10向按壓部15按壓靠合，蛇腹型之針管部10則被壓縮，其針管部10內之藥劑A則被擠壓由固定座121底部之凹槽122及導引槽12進入針頭16內（如第七、八圖所示），其藥劑A即可由針尖160注射入病患身體內，並藉由針管部10之下定位座11上之凸體110設入於固定座121之凹槽122內，凸體110則可將針管部10內之藥劑A完全擠壓出，如此，即可完成藥劑A之注射；而本創作藉由於針管部10外之伸縮定位環13設置，可依被注射者所需使用之藥劑量不同來注射，例如：幼兒、成人及老年人所需的藥劑量不同而可做分段式注射，當分段注射時（如第六圖所示），上定位座12則向伸縮定位環13內收合，使伸縮定位環13內壁面上的定位凸體130嵌設於上定位座12之上環槽125及下環槽126內定位，完成第一段的注射量，可設定每一段之注射量為10ml，若要再增加注射量則再繼續按壓按壓部15下移，而針管部10外的各伸縮定位環13則呈一一收合狀態，每一伸縮定位環13之注射量亦設定為10ml，最上層的伸縮定位環13設入於下層的伸縮定位環13內，使各伸縮定位環13內壁面之定位凸體130與外壁面之定位凹槽131相互嵌設定位，而藥劑A須完全注射時（如第七、八圖所示），各伸縮定位環13則完全收合至下定位座11內，如此，藉由各伸縮定位環13之設置來控制針管部10每次按壓之藥劑A注射量，以供不同年齡層之被注射者注射適量的藥劑A；當藥劑A注射完後，僅需鬆開針筒部10與按壓部15之按壓力，其針筒部10之蛇腹型壁面則彈性回復成原狀（如第四圖所示），再將按壓部15之卡勾152與上定位座12之定位卡塊124解扣，其錐狀之蛇腹型的壓縮部14亦彈性回復將按壓部15向上頂推回原位，其壓縮部14與按壓部15則再次將針頭16予以遮蔽，使針頭16不外露，如此，即可完成整個注射藥劑之動作；本創作將針頭、針管及藥劑設為一體式，可將針頭16隱藏於注射器1內部，防止被針扎之危險性，可確實達到注射針筒使用之安全性，且無須另外設置針頭套，可減少醫療廢棄物之產生及其處理費用，並可使注射藥劑之操作程序更簡化，使注射藥劑更具便利性。When using this creation, please refer to the third to eighth pictures. The medical staff only needs to support the bottom of theneedle tube part 10 with their thumbs, and hold the two fingers on thebuckle piece 151 of the pressing part 15 (as shown in the third picture) (Shown), press theretaining piece 151 and thepositioning seat 11 under the bottom of theneedle tube portion 10, so that thepressing portion 15 squeezes thecompression portion 14 and moves upward thepositioning seat 12, and theneedle tip 160 of theneedle 16 located in thecompression portion 14 Thepiercing surface 150 of thepressing portion 15 is pierced and extended. At the same time, the conical bellows-shaped compression portion 14 is compressed by thepressing portion 15 to be compressed into a folded state, and thepositioning block 124 of theupper positioning seat 12 Then it is clamped in thehook 152 at the bottom of thebuckle piece 151, and thepressing part 15 is positioned on theupper positioning seat 12 without loosening (as shown in Figures 4 and 5). In this way, the patient can be treated with medicine For injection, insert theneedle tip 160 of theneedle 16 protruding from thepuncture surface 150 of thepressing part 15 into the patient's body, and then press theneedle tube part 10 against thepressing part 15, and the bellows-shapedneedle tube part 10 is compressed , The medicine A in theneedle tube portion 10 is squeezed into theneedle 16 from thegroove 122 at the bottom of thefixing seat 121 and the guide groove 12 (as shown in Figures 7 and 8), and the medicine A can be injected by theneedle 160 Into the patient's body, and theconvex body 110 on thepositioning seat 11 under theneedle tube part 10 is set into thegroove 122 of thefixing seat 121, and theconvex body 110 can completely squeeze the medicine A in theneedle tube part 10 In this way, the injection of drug A can be completed; and this creation can be injected according to the different doses of drugs needed by the person being injected due to thetelescopic positioning ring 13 outside theneedle tube portion 10, such as: children, adults, and elderly Different doses of medicine required by humans can be injected in segments. When injecting in segments (as shown in the sixth figure), theupper positioning seat 12 is folded into thetelescopic positioning ring 13 to make the inner wall surface of thetelescopic positioning ring 13 Theupper positioning protrusion 130 is embedded in theupper ring groove 125 and thelower ring groove 126 of theupper positioning seat 12 and is positioned to complete the injection volume of the first stage. The injection volume of each stage can be set to 10ml. If you want to increase the injection volume, Then continue to press thepressing portion 15 to move down, and thetelescopic positioning rings 13 outside theneedle tube portion 10 are in a closed state, and the injection volume of eachtelescopic positioning ring 13 is also set to 10ml. The uppermosttelescopic positioning ring 13 is set Into the lowertelescopic positioning ring 13 so that thepositioning protrusion 130 on the inner wall surface of eachtelescopic positioning ring 13 and thepositioning groove 131 on the outer wall surface are embedded in each other, and when the medicine A must be completely injected (as shown in Figures 7 and 8 (Shown), eachtelescopic positioning ring 13 is completely folded into thelower positioning seat 11, so that the setting of eachtelescopic positioning ring 13 controls the injection volume of medicine A each time theneedle tube 10 is pressed, for different age groups The injected person injects an appropriate amount of medicine A; after the injection of medicine A, only need to loosen the pressing force of thesyringe part 10 and thepressing part 15, and the bellows-shaped wall surface of thesyringe part 10 will elastically return to its original shape (such as (Shown in the four figures), then unfasten thehook 152 of thepressing portion 15 and thepositioning block 124 of theupper positioning seat 12, the tapered shape The bellows-shaped compression part 14 also elastically returns to push thepressing part 15 up and back to the original position. Thecompression part 14 and thepressing part 15 again cover theneedle 16 so that theneedle 16 is not exposed. In this way, the entire injection can be completed. Action of medicament; this creation integrates the needle, needle tube and medicament, which can hide theneedle 16 inside the syringe 1 to prevent the danger of being punctured by the needle, and can indeed achieve the safety of the injection syringe, and no additional settings are required The needle cover can reduce the generation and disposal cost of medical waste, and can simplify the operation procedure of injecting drugs, making the injection of drugs more convenient.

綜上所述，本創作確實已達到所預期之使用目的與功效，且更較習知者為之理想、實用，惟，上述實施例僅係針對本創作之較佳實施例進行具體說明而已，該實施例並非用以限定本創作之申請專利範圍，舉凡其它未脫離本創作所揭示之技術手段下所完成之均等變化與修飾，均應包含於本創作所涵蓋之申請專利範圍中。In summary, this creation has indeed achieved the intended purpose and effect of use, and is more ideal and practical than the conventional ones. However, the above embodiments are only specific descriptions of the preferred embodiments of this creation. This embodiment is not intended to limit the scope of patent application for this creation. All other equal changes and modifications made without departing from the technical means disclosed in this creation should be included in the scope of patent application covered by this creation.

1:注射器10:針管部11:下定位座110:凸體111:上凸緣112:下凸緣12:上定位座120:穿孔121:固定座122:凹槽123:導引槽124:定位卡塊125:上環槽126:下環槽13:伸縮定位環130:定位凸體131:定位凹槽14:壓縮部15:按壓部150:穿刺面151:扣持片152:卡勾16:針頭160:針尖A:藥劑1: Syringe10: Needle tube11: Lower positioning seat110: convex body111: Upper flange112: Lower flange12: Upper positioning seat120: Piercing121: fixed seat122: Groove123: guide slot124: positioning card block125: upper ring groove126: Lower ring groove13: Telescopic positioning ring130: positioning convex131: positioning groove14: Compression section15: Pressing part150: Piercing151: Buckle piece152: Card Hook16: Needle160: Needle PointA: Pharmacy

第一圖所示係為本創作實施例之立體圖。 第二圖所示係為本創作實施例之組合剖視圖。 第三圖所示係為本創作實施例握持注射器之使用示意圖。 第四圖所示係為本創作實施例第一次按壓針頭穿出之使用立體圖。 第五圖所示係為本創作實施例第一次按壓針頭穿出之剖面示意圖。 第六圖所示係為本創作實施例按壓第一段注射藥劑之剖面示意圖。 第七圖所示係為本創作實施例藥劑完全注射之使用立體圖。 第八圖所示係為本創作實施例藥劑完全注射之剖面示意圖。The first figure shows a three-dimensional view of this creative embodiment. The second figure shows a combined cross-sectional view of this creative embodiment. The third figure shows a schematic diagram of the use of holding the syringe in this creative embodiment. The fourth figure shows a three-dimensional view of the first time the needle is pushed out of this creative embodiment. The fifth figure shows a schematic cross-sectional view of the first pressing needle for this creative embodiment. The sixth figure shows a schematic cross-sectional view of the first segment of the injection of the medicine according to the embodiment of this creation. The seventh figure shows a perspective view of the complete injection of the medicament used in this creative embodiment. The eighth figure shows a schematic cross-sectional view of the complete injection of the medicament in this creative embodiment.

1:注射器1: Syringe

10:針管部10: Needle tube

11:下定位座11: Lower positioning seat

110:凸體110: convex body

111:上凸緣111: Upper flange

112:下凸緣112: Lower flange

12:上定位座12: Upper positioning seat

120:穿孔120: Piercing

121:固定座121: fixed seat

122:凹槽122: Groove

123:導引槽123: guide slot

124:定位卡塊124: positioning card block

125:上環槽125: upper ring groove

126:下環槽126: Lower ring groove

13:伸縮定位環13: Telescopic positioning ring

130:定位凸體130: positioning convex

131:定位凹槽131: positioning groove

14:壓縮部14: Compression section

15:按壓部15: Pressing part

150:穿刺面150: Piercing

151:扣持片151: Buckle piece

152:卡勾152: Card Hook

16:針頭16: Needle

160:針尖160: Needle Point

A:藥劑A: Pharmacy

Claims (1)

Translated fromChinese

一種注射器，主要係設有一針管部，該針管部係設為蛇腹型，該針管部之底部設有一下定位座，該下定位座設有一凸體，該針管部之頂部設有一上定位座，該上定位座上設有一穿孔，該上定位座之底面設有一固定座，該固定座內設有一凹槽，該固定座之底緣設有數個連通於該凹槽之導引槽，該上定位座之頂緣上設有定位卡塊，該上定位座之上方設有一壓縮部，該壓縮部係設為錐狀之蛇腹型，該壓縮部之上方設有一按壓部，該按壓部中間部位設為穿刺面，該按壓部之兩側延伸設有一扣持片，該扣持片之底面設有供與該上定位座之該定位卡塊相互卡設之卡勾，一針頭係固設於該上定位座之穿孔上，該針頭之底端係連通於該固定座之凹槽內，該針頭並位於該壓縮部內，該針頭之針尖並位於該按壓部之穿刺面下方； 其特徵係在：該下定位座之內壁面上設有一上凸緣及一下凸緣，該上定位座之外壁面上設有一上環槽及一下環槽，該上定位座與該下定位座之間設有數個相互套接之伸縮定位環，該伸縮定位環係罩設於該針管部之外部，該伸縮定位環上係設有供相互嵌設之定位凸體與定位凹槽。A syringe is mainly provided with a needle tube part, the needle tube part is made of a bellows shape, the bottom of the needle tube part is provided with a lower positioning seat, the lower positioning seat is provided with a convex body, and the top of the needle tube part is provided with an upper positioning seat, The upper positioning seat is provided with a perforation, the bottom surface of the upper positioning seat is provided with a fixing seat, the fixing seat is provided with a groove, and the bottom edge of the fixing seat is provided with a plurality of guide grooves communicating with the groove. A positioning block is arranged on the top edge of the positioning seat, and a compression part is arranged above the upper positioning seat. The compression part is set in a cone-shaped bellows shape. A pressing part is arranged above the compression part and the middle part of the pressing part Set as a piercing surface, a buckle piece is extended on both sides of the pressing part, the bottom surface of the buckle piece is provided with a hook for interlocking with the positioning block of the upper positioning seat, and a needle is fixed on On the perforation of the upper positioning base, the bottom end of the needle is connected to the groove of the fixing base, the needle is located in the compression part, and the needle tip of the needle is located below the piercing surface of the pressing part; It is characterized in that: the inner wall of the lower positioning seat is provided with an upper flange and a lower flange, the outer wall of the upper positioning seat is provided with an upper ring groove and a lower ring groove, the upper positioning seat and the lower positioning seat are A number of telescopic positioning rings sleeved in between are arranged, the telescopic positioning ring is arranged outside the needle tube part, and the telescopic positioning ring is provided with positioning protrusions and positioning grooves for mutual embedding.

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