TWI733550B

TWI733550B - Syringe

Info

Publication number: TWI733550B
Application number: TW109126909A
Authority: TW
Inventors: 郭星君; 王緣釉; 陳孟筠; 陳怡靜; 陳冠穎; 黃品嘉; 羅婕瑜; 龔慧文
Original assignee: 長庚學校財團法人長庚科技大學
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-07-11
Also published as: TW202206131A

Abstract

一種注射針筒，包含一個筒體及一個活塞組件。該活塞組件包括一個可被前後推拉地往前插裝在該筒體中的活塞桿，及一個自該活塞桿後端往前突伸且位於該筒體外周側而用以可脫離地往後卡扣於該筒體的卡扣件。藉由該卡扣件可脫離地往後卡扣於該筒體的設計，醫護人員在以該注射針筒將流體加壓灌注於一個待灌注物時，能使該活塞桿定位而不會因該待灌注物之彈性復形作用力而被往後推移，可避免流體回流至該筒體，也可避免需重複施打的情況發生。An injection syringe includes a barrel and a piston assembly. The piston assembly includes a piston rod that can be pushed and pulled forwards and inserted into the cylinder, and a piston rod that protrudes forward from the rear end of the piston rod and is located on the outer peripheral side of the cylinder for detachably back A buckle that is buckled on the cylinder. With the design that the buckle can be detachably buckled back to the barrel, when the medical staff uses the injection syringe to pressurize the fluid into a to-be-infused object, the piston rod can be positioned without being affected. The elastic recovery force of the to-be-filled object is pushed backwards, which can prevent the fluid from flowing back to the cylinder, and can also avoid the need to repeatedly spray.

Description

注射針筒Syringe

本發明是有關於一種醫療器材，特別是指一種能用於注射蒸餾水、生理食鹽水、藥劑與氣體等流體的注射針筒。The invention relates to a medical device, in particular to an injection syringe that can be used to inject fluids such as distilled water, physiological saline, medicine and gas.

一已知的注射針筒包含一個筒體，及一個位於該筒體內的活塞桿，在一般的醫療行為中，醫護人員藉由推動或拉動該活塞桿，即可順利地將該筒體內的藥劑注射於病患體內，或是抽取病患之血液作為檢體。但在較為特殊的醫療行為中，如導尿管置入術，使用目前已知的注射針筒進行蒸餾水灌注作業時不如預期中順利。A known injection syringe includes a barrel and a piston rod located in the barrel. In general medical practices, the medical staff can smoothly remove the medicament in the barrel by pushing or pulling the piston rod. Inject into the patient's body, or draw the patient's blood as a sample. However, in more special medical activities, such as catheterization, the operation of distilled water perfusion using the currently known injection syringe is not as smooth as expected.

當醫護人員將一個導尿管其中具有一個氣囊的一端置入病患之膀胱後，需於該導尿管另一端的一個注水處透過已知的注射針筒灌注蒸餾水，使該氣囊膨脹進而將該導尿管固定於膀胱內不致脫落。然而在灌注蒸餾水的過程中，該氣囊逐漸膨脹產生壓力，醫護人員需以較大之力氣推動該活塞桿以抵抗壓力，若施打時推力不足，可能發生該氣囊內的蒸餾水回流至該筒體內，甚至該導尿管自膀胱脫落之情形，將使醫護人員需再次灌注蒸餾水或重新置入該導尿管，操作上不便利且效率不佳。When the medical staff inserts the end of a urinary catheter with a balloon into the patient’s bladder, the other end of the catheter needs to be filled with distilled water through a known injection syringe to inflate the balloon and then The urinary catheter is fixed in the bladder and will not fall off. However, during the process of pouring distilled water, the airbag gradually expands to generate pressure. The medical staff needs to push the piston rod with greater force to resist the pressure. If the thrust is insufficient during the injection, the distilled water in the airbag may flow back into the cylinder. , Even if the urinary catheter falls off from the bladder, the medical staff will need to infuse distilled water again or re-insert the urinary catheter, which is inconvenient and inefficient in operation.

因此，本發明的目的，即在提供一種使用便利，能提高施打效率的注射針筒。Therefore, the purpose of the present invention is to provide an injection syringe that is convenient to use and can improve the efficiency of injection.

於是，本發明注射針筒，包含一個筒體及一個活塞組件。該活塞組件包括一個可被前後推拉地往前插裝在該筒體中的活塞桿，及一個自該活塞桿後端往前突伸且位於該筒體外周側而用以可脫離地往後卡扣於該筒體的卡扣件。Therefore, the injection syringe of the present invention includes a barrel and a piston assembly. The piston assembly includes a piston rod that can be pushed and pulled forwards and inserted into the cylinder, and a piston rod that protrudes forward from the rear end of the piston rod and is located on the outer peripheral side of the cylinder for detachably back A buckle that is buckled on the cylinder body.

本發明的功效在於：藉由該卡扣件可脫離地往後卡扣於該筒體的設計，醫護人員在以該注射針筒將流體加壓灌注於一個待灌注物時，能使該活塞桿定位而不會因該待灌注物之彈性復形作用力而被往後推移，可避免流體回流至該筒體，也可避免需重複施打的情況發生。The effect of the present invention is that by the design that the buckle can be detachably buckled to the barrel body backwards, when the medical staff pressurizes the injection syringe to infuse the fluid into an object to be infused, the piston can be The rod is positioned so that it will not be pushed back due to the elastic reshaping force of the object to be poured, which can prevent the fluid from flowing back to the cylinder, and can also avoid the need for repeated injections.

在本發明被詳細描述前，應當注意在以下的說明內容中，類似的元件是以相同的編號來表示。Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numbers.

參閱圖1、2、3，本發明注射針筒的一第一實施例，適用於注射流體於一個待灌注物中，所述之流體可以是蒸餾水、生理食鹽水、藥劑與氣體等，而該待灌注物可以是導尿管，也可以是其他醫療行為所需的待灌注物。在本第一實施例中，該注射針筒用於注射蒸餾水於一個導尿管5中，並包含一個筒體1，及一個活塞組件2。Referring to Figures 1, 2, and 3, a first embodiment of the injection syringe of the present invention is suitable for injecting fluid into a substance to be infused. The fluid can be distilled water, physiological saline, medicament and gas, etc. The object to be infused can be a urinary catheter, or it can be an object to be infused for other medical actions. In the first embodiment, the injection syringe is used to inject distilled water into a urinary catheter 5 and includes a cylinder 1 and a piston assembly 2.

該筒體1包括一個開口朝後的筒身部11、一個設置於該筒身部11前端的定位部12、一個徑向突設於該筒身部11後端之外周面且具有一個前後貫穿之穿孔131的抵推環部13，及一個前後延伸地連通組接於該筒身部11前端的連接部14，該連接部14可用以連通***該待灌注物中。在本第一實施例中，該連接部14之管壁是為等徑的型態，但在其它實施態樣中，也可以是往前漸縮之錐狀型態。該穿孔131具有一個沿該筒身部11之徑向延伸的穿伸孔部132，及一個由該穿伸孔部132徑向外端相對該筒身部11橫向延伸的限位孔部133。The barrel 1 includes a barrel portion 11 with an opening facing rearward, a positioning portion 12 provided at the front end of the barrel portion 11, and a radially protruding portion on the outer peripheral surface of the rear end of the barrel portion 11 and has a front and rear through The push ring portion 13 of the perforation 131 and a connecting portion 14 extending forward and backward to connect to the front end of the barrel portion 11 can be used to connect and insert the object to be poured. In the first embodiment, the pipe wall of the connecting portion 14 is of a shape of equal diameter, but in other embodiments, it may be of a tapered shape that tapers forward. The through hole 131 has a through hole portion 132 extending in the radial direction of the barrel portion 11 and a limiting hole portion 133 extending from the radially outer end of the through hole portion 132 transversely to the barrel portion 11.

該活塞組件2包括一個可被前後推拉地往前插裝在該筒身部11中的活塞桿21，及一個連接於該活塞桿21且可前後位移地穿置該穿孔131的卡扣件22。該卡扣件22具有一個自該活塞桿21後端往前沿該筒身部11外周側延伸的桿部221，及一個自該桿部221前端朝該筒身部11突伸的扣部222。The piston assembly 2 includes a piston rod 21 that can be pushed and pulled forwards and inserted into the barrel portion 11, and a buckle 22 connected to the piston rod 21 and capable of penetrating the through hole 131 for displacement. . The buckle 22 has a rod portion 221 extending from the rear end of the piston rod 21 to the front edge of the barrel portion 11 and a buckle portion 222 protruding from the front end of the rod portion 221 toward the barrel portion 11.

當要將該活塞組件2組裝於該筒體1使用時，是以該卡扣件22往前對準通過該穿孔131之該穿伸孔部132的方式，使該活塞桿21往前***該筒身部11中。然後，於該扣部222通過該穿孔131後，可相對該筒體1旋轉該活塞桿21，連動該卡扣件22之該桿部221橫向移入該穿孔131的該限位孔部133。由於該限位孔部133之徑向口徑小於該桿部221與該扣部222的徑向總寬度，所以可利用該抵推環部13來防止該扣部222的後移脫離，進而使該活塞桿21無法脫離地插裝在該筒身部11內。When the piston assembly 2 is to be assembled to the cylinder 1 for use, the buckle 22 is aligned forward with the penetration hole 132 passing through the through hole 131, so that the piston rod 21 is inserted forward into the The barrel part 11中. Then, after the buckle portion 222 passes through the through hole 131, the piston rod 21 can be rotated relative to the cylinder 1 to move the rod portion 221 of the buckle member 22 laterally into the limiting hole portion 133 of the through hole 131. Since the radial diameter of the limiting hole portion 133 is smaller than the total radial width of the rod portion 221 and the buckle portion 222, the push ring portion 13 can be used to prevent the buckle portion 222 from moving back and detaching, thereby causing the The piston rod 21 is inserted into the barrel portion 11 in a non-detachable manner.

該注射針筒組裝於該導尿管5而用以施行導尿管置入術時，通常需將容裝於該注射針筒之蒸餾水一次性地完全施打進該導尿管5的一氣囊(圖未示)中。醫護人員於相對該筒體1往前推移該活塞桿21時，該卡扣件22的該桿部221會被同步連動沿著該筒身部11外周側向前移動(如圖2所示)，當該活塞桿21被推進至該筒身部11最前端時，蒸餾水完全被注射進該氣囊中，此時該扣部222會與設置於該筒身部11前端的定位部12卡扣定位(如圖3所示)，使得該活塞桿21不會因該氣囊彈性膨脹產生之壓力而被往後推移。When the injection syringe is assembled to the urinary catheter 5 for catheterization, usually the distilled water contained in the injection syringe is completely injected into an air bag of the urinary catheter 5 at one time. (Picture not shown). When the medical staff pushes the piston rod 21 forward relative to the barrel 1, the rod portion 221 of the buckle 22 will be synchronized and linked to move forward along the outer circumference of the barrel portion 11 (as shown in FIG. 2) When the piston rod 21 is pushed to the front end of the barrel portion 11, the distilled water is completely injected into the airbag. At this time, the buckle portion 222 will be snapped and positioned with the positioning portion 12 provided at the front end of the barrel portion 11 (As shown in Figure 3), so that the piston rod 21 will not be pushed back due to the pressure generated by the elastic expansion of the airbag.

參閱圖4、5、6，本發明注射針筒的一第二實施例與該第一實施例的結構大致相同，不同處在於：該筒體1之該定位部12的結構設計。為方便說明，以下將僅針對各實施例間之差異處進行描述。Referring to FIGS. 4, 5 and 6, a second embodiment of the injection syringe of the present invention has substantially the same structure as the first embodiment, except for the structure design of the positioning portion 12 of the barrel 1. For the convenience of description, only the differences between the embodiments will be described below.

在本第二實施例中，該定位部12是凹設於該筒身部11外周面，且具有多個前後排列並用以供該扣部222可脫離地往後卡扣定位的卡齒121。每一卡齒121具有一個自該筒身部11徑向往外並往前傾斜延伸而用以導引該卡扣件22前後移動的導斜面122，及一個由該導斜面122前緣徑向往內延伸且用以供該扣部222往後卡扣定位的抵擋面123。In the second embodiment, the positioning portion 12 is recessed on the outer peripheral surface of the barrel portion 11 and has a plurality of teeth 121 arranged in a front-to-back arrangement for the buckle portion 222 to be detachably buckled and positioned backward. Each tooth 121 has an inclined guide surface 122 extending radially outward from the barrel portion 11 and obliquely forward to guide the buckle member 22 to move back and forth, and a guide inclined surface 122 radially inward from the front edge of the guide inclined surface 122 A resisting surface 123 extended and used for the buckle portion 222 to be buckled and positioned backward.

當醫護人員欲以該注射針筒抽取蒸餾水時，可相對該筒體1旋轉該活塞桿21，藉以連動該卡扣件22之該桿部221橫向移入該限位孔部133，進而使該扣部222橫移脫離該定位部12，而靠抵於該筒身部11之平滑外周面。然後，就可相對該筒體1往後拉移該活塞桿21以抽取所需之蒸餾水，由於該扣部222是靠抵於該筒身部11之平滑外周面，所以該活塞桿21能相對該筒體1被滑順地往後拉移。當完成蒸餾水的抽取作業後，相對該筒體1旋轉該活塞桿21，使該桿部221橫向往右移入該穿伸孔部132，連動使該扣部222橫移至該定位部12，而卡扣其中一卡齒121。When the medical staff wants to extract distilled water with the injection syringe, they can rotate the piston rod 21 relative to the barrel 1, thereby linking the rod 221 of the buckle 22 to move laterally into the limiting hole 133, thereby making the buckle The portion 222 moves laterally away from the positioning portion 12 and abuts against the smooth outer peripheral surface of the barrel portion 11. Then, the piston rod 21 can be pulled back relative to the barrel 1 to extract the required distilled water. Since the buckle portion 222 is against the smooth outer surface of the barrel portion 11, the piston rod 21 can be opposed to The cylinder 1 is pulled back smoothly. After the extraction of distilled water is completed, the piston rod 21 is rotated relative to the cylinder 1, so that the rod portion 221 is moved laterally to the right into the penetration hole portion 132, and the buckle portion 222 is moved laterally to the positioning portion 12 in linkage, and Buckle one of the teeth 121.

接著，要將容裝於該注射針筒之蒸餾水分段地注射進該氣囊時，在推進該活塞桿21的過程中，該扣部222沿著每一卡齒121的該導斜面122向前移動，且使該桿部221微幅徑向朝外彈性偏擺(如圖5所示)，當該扣部222越過該導斜面122前緣之後，該桿部221之復形彈力會帶動該扣部222徑向朝內擺移，並接著沿下一卡齒121的該導斜面122向前移動。當注射動作暫時停止時，該扣部222會往後卡扣於所越過之最後一個卡齒121的該抵擋面123，使該活塞桿21定位而不會因該氣囊彈性膨脹產生之壓力被往後推移 (如圖6所示)。Next, when injecting the distilled water contained in the injection syringe into the airbag in sections, during the process of advancing the piston rod 21, the buckle portion 222 moves forward along the guide slope 122 of each tooth 121 Move, and make the rod 221 slightly deflect radially outward (as shown in FIG. 5). When the buckle 222 passes over the front edge of the inclined guide surface 122, the complex elastic force of the rod 221 will drive the The buckle portion 222 swings radially inward, and then moves forward along the inclined guide surface 122 of the next tooth 121. When the injection action is temporarily stopped, the buckle portion 222 will be buckled back on the resisting surface 123 of the last tooth 121 that it crossed, so that the piston rod 21 will be positioned without being pushed back by the pressure generated by the elastic expansion of the airbag. After moving (as shown in Figure 6).

在本第二實施例中，該定位部12是凹設在該筒身部11外周面，但實施時，在本發明之另一實施態樣中，該定位部12也可以設計成外凸於該筒身部11外周面，亦可達到與該扣部222卡扣定位的目的。In the second embodiment, the positioning portion 12 is recessed on the outer peripheral surface of the barrel portion 11, but in implementation, in another embodiment of the present invention, the positioning portion 12 can also be designed to protrude outwardly. The outer peripheral surface of the barrel portion 11 can also achieve the purpose of snapping and positioning with the buckle portion 222.

參閱圖7、8、10，本發明注射針筒的一第三實施例與該第一實施例的組成構件大致相同，不同處在於：該筒體1與該活塞組件2間的卡扣定位結構設計。Referring to Figures 7, 8, and 10, a third embodiment of the injection syringe of the present invention has substantially the same components as the first embodiment. The difference is: the buckle positioning structure between the barrel 1 and the piston assembly 2 design.

在本第三實施例中，該筒體1包括一個筒身部11、一個抵推環部13，及一個連接部14。該抵推環部13具有一個前後貫穿之卡孔134，該卡孔134具有一個相對於該筒身部11徑向延伸的調移孔部135，及一個連通該調移孔部135右側且徑向口徑小於該調移孔部135徑向口徑的定位孔部136。In the third embodiment, the barrel 1 includes a barrel portion 11, a thrust ring portion 13, and a connecting portion 14. The thrust ring portion 13 has a locking hole 134 penetrating forward and backward. The locking hole 134 has an adjustment hole portion 135 extending radially with respect to the barrel portion 11, and an adjustment hole portion 135 connected to the right side of the adjustment hole portion 135 and has a diameter. The positioning hole 136 has a diameter smaller than the radial diameter of the adjustment hole 135.

該活塞組件2包括一個往前插裝在該筒身部11中的活塞桿21、一個樞接於該活塞桿21且往前穿設於該卡孔134的卡扣件22，及一個安裝在該活塞桿21與該卡扣件22間的彈性件23。The piston assembly 2 includes a piston rod 21 that is inserted forwardly in the barrel portion 11, a buckle 22 that is pivotally connected to the piston rod 21 and penetrates the hole 134 forwardly, and a buckle 22 that is mounted on The elastic member 23 between the piston rod 21 and the locking member 22.

該卡扣件22是可相對該活塞桿21徑向往外偏擺地以其後端部樞設於該活塞桿21後端，並具有一個前後延伸的桿部221，及一個前後延伸地同體突設於該桿部221右側的扣部222，該扣部222與該桿部221之徑向內側底緣相切齊，且該扣部222之徑向寬度小於該桿部221之徑向寬度。該扣部222背向該活塞桿21一側突設有多個前後排列的卡齒223。每一卡齒223具有一個相對該活塞桿21徑向朝外且往後傾斜突伸的導斜面224，及一個由該導斜面224後緣徑向往內突伸的抵擋面225。The buckle member 22 can be pivoted to the rear end of the piston rod 21 with its rear end pivoted radially outward relative to the piston rod 21, and has a rod portion 221 extending forward and backward, and a body extending forward and backward. A buckle portion 222 protruding from the right side of the rod portion 221, the buckle portion 222 is aligned with the radially inner bottom edge of the rod portion 221, and the radial width of the buckle portion 222 is smaller than the radial width of the rod portion 221 . The buckle portion 222 protrudes from the side facing the piston rod 21 with a plurality of locking teeth 223 arranged in a front-to-back arrangement. Each tooth 223 has an inclined guide surface 224 protruding radially outward and backward relative to the piston rod 21, and a resisting surface 225 protruding radially inward from the rear edge of the inclined guide surface 224.

該彈性件23是設置於該活塞桿21後端與該卡扣件22間，且恆具有驅使該卡扣件22徑向偏擺遠離該活塞桿21之彈力。The elastic member 23 is arranged between the rear end of the piston rod 21 and the buckle 22 and has an elastic force that drives the buckle 22 to deflect radially away from the piston rod 21.

當要將該活塞組件2組裝於該筒體1使用時，將該桿部221與該扣部222分別往前對準通過該卡孔134之該調移孔部135與該定位孔部136，並將該活塞桿21往前***該筒身部11中。When the piston assembly 2 is to be assembled to the cylinder 1 for use, the rod portion 221 and the buckle portion 222 are respectively aligned forward with the adjustment hole portion 135 and the positioning hole portion 136 passing through the locking hole 134, The piston rod 21 is inserted into the barrel portion 11 forward.

參閱圖8、9，當醫護人員需將容裝於該注射針筒之蒸餾水分段地注射進該導尿管5的該氣囊時，可驅使該卡扣件22擺靠向該筒身部11，使該扣部222之每一卡齒223可直接往前穿過該定位孔部136，然後相對該筒體1往前推移該活塞桿21以進行蒸餾水的灌注作業。8 and 9, when the medical staff needs to inject the distilled water contained in the injection syringe into the airbag of the urinary catheter 5 in sections, the buckle 22 can be driven to swing against the barrel portion 11 , So that each tooth 223 of the buckle portion 222 can directly pass through the positioning hole portion 136 forward, and then the piston rod 21 is moved forward relative to the barrel 1 to perform the filling operation of distilled water.

參閱圖10、11，當注射動作暫時停止時，醫護人員可鬆開該卡扣件22，該卡扣件22會受到該彈性件23驅動而徑向往外彈性偏擺靠抵於該卡孔134孔緣，此時，該卡扣件22會以其中一卡齒223之該抵擋面225往後定位卡抵於該抵推環部13前側面，使該活塞桿21定位而不會因該氣囊彈性膨脹產生之壓力被往後推移。10, 11, when the injection action is temporarily stopped, the medical staff can release the buckle 22, the buckle 22 will be driven by the elastic member 23 to elastically deflect radially outward and abut against the hole 134 The edge of the hole, at this time, the retaining member 22 will be positioned backwards by the retaining surface 225 of one of the retaining teeth 223 against the front side of the pushing ring portion 13, so that the piston rod 21 can be positioned without being affected by the airbag The pressure generated by the elastic expansion is pushed back.

在本第三實施例中，該扣部222背向該活塞桿21一側突設有該等卡齒223，並利用該彈性件23驅使該卡扣件22相對該筒體1徑向往外偏擺，使該卡扣件22以其中一卡齒223往後卡抵於該抵推環部13以進行定位。但實施時，在本發明之另一實施態樣中，可於該扣部222面向該活塞桿21一側突設該等卡齒223，並將該彈性件23設計成會驅使該卡扣件22徑向往內擺靠向該筒體1之態樣，同樣可達到以該卡扣件22之其中一卡齒223往後卡扣於該抵推環部13前側面，而使該活塞桿21無法被往後推移之目的。In the third embodiment, the buckle portion 222 is protruding from the side of the piston rod 21 with the teeth 223, and the elastic member 23 is used to drive the buckle member 22 to deviate radially outward relative to the cylinder 1 Swing, so that the buckle member 22 is buckled against the push ring portion 13 with one of the teeth 223 for positioning. However, during implementation, in another embodiment of the present invention, the locking teeth 223 can be protrudingly provided on the side of the buckle portion 222 facing the piston rod 21, and the elastic member 23 is designed to drive the locking member The state where 22 is swayed radially inward toward the cylinder 1 can also achieve that one of the teeth 223 of the buckle 22 is buckled on the front side of the push ring 13 to make the piston rod 21 The purpose of being unable to be moved later.

除此之外，在本發明之另一實施態樣中，該卡扣件22是設計成利用自身的彈性徑向往外偏移，而在該活塞桿21後端與該卡扣件22間未設置該彈性件23，同樣可達到以該卡扣件22之其中一卡齒223往後卡扣於該抵推環部13前側面，而使該活塞桿21無法被往後推移之目的。In addition, in another embodiment of the present invention, the buckle 22 is designed to use its own elasticity to deflect radially outward, and there is no gap between the rear end of the piston rod 21 and the buckle 22. The provision of the elastic member 23 can also achieve the purpose of using one of the teeth 223 of the locking member 22 to be buckled backward on the front side of the pushing ring portion 13 so that the piston rod 21 cannot be pushed backward.

綜上所述，透過該活塞組件2之該活塞桿21與該卡扣件22之結構設計，以及該筒體1用以供該卡扣件22可脫離地卡扣結構設計，使得該注射針筒於將流體加壓灌注於該待灌注物時，可利用該卡扣件22卡扣於該筒體1的方式，將該活塞桿21定位在被往前擠推的位置，而不會被該待灌注物被灌注流體後所產生的壓力往後頂開，所以有助於提高該注射針筒用以將流體加壓灌注於該待灌注物時的使用方便性，是一種相當創新實用的創作，因此，確實可達到本發明之目的。In summary, through the structural design of the piston rod 21 and the buckle 22 of the piston assembly 2, and the barrel 1 for the detachable buckle design of the buckle 22, the injection needle When the cylinder is pressurized to infuse the fluid into the object to be poured, the buckle 22 can be used to buckle the cylinder 1 to position the piston rod 21 at a position that is pushed forward without being pushed forward. The pressure generated by the fluid to be infused is pushed back, so it helps to improve the ease of use when the injection syringe is used to pressurize the fluid into the material to be infused, which is quite innovative and practical. Creation, therefore, can indeed achieve the purpose of the present invention.

惟以上所述者，僅為本發明的實施例而已，當不能以此限定本發明實施的範圍，凡是依本發明申請專利範圍及專利說明書內容所作的簡單的等效變化與修飾，皆仍屬本發明專利涵蓋的範圍內。However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope covered by the patent of the present invention.

1:筒體 11:筒身部 12:定位部 121:卡齒 122:導斜面 123:抵擋面 13:抵推環部 131:穿孔 132:穿伸孔部 133:限位孔部 134:卡孔 135:調移孔部 136:定位孔部 14:連接部 2:活塞組件 21:活塞桿 22:卡扣件 221:桿部 222:扣部 223:卡齒 224:導斜面 225:抵擋面 23:彈性件 5:導尿管 1: cylinder 11: Barrel 12: Positioning department 121: card tooth 122: Guide slope 123: Resistance 13: Arrival and push ring 131: Piercing 132: Piercing 133: Limit hole 134: Card hole 135: Adjust the hole 136: Positioning hole 14: Connection part 2: Piston assembly 21: Piston rod 22: Clip 221: Pole 222: Buckle 223: Snap 224: Guide slope 225: Resisting Surface 23: Elastic parts 5: Catheter

本發明的其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是一立體分解圖，說明本發明注射針筒的一第一實施例；圖2是一局部剖視圖，說明該第一實施例注射時，該注射針筒之一卡扣件未卡扣於一筒體的狀態；圖3是一類似圖2之視圖，說明該第一實施例注射完成時，該卡扣件卡扣於該筒體的狀態；圖4是一立體分解圖，說明本發明注射針筒的一第二實施例；圖5是一不完整的局部剖視圖，說明該第二實施例注射時，該注射針筒之一卡扣件未卡扣於一筒體的狀態；圖6是一類似圖5之視圖，說明該第二實施例注射暫停時，該卡扣件卡扣於該筒體的狀態；圖7是一立體分解圖，說明本發明注射針筒的一第三實施例；圖8是一局部剖視圖，說明該第三實施例注射時，該注射針筒之一卡扣件未卡扣於一筒體的狀態；圖9是一不完整的局部剖視圖，說明該第三實施例注射時，該卡扣件之一卡齒通過該注射針筒之一卡孔的狀態；圖10是一局部剖視圖，說明該第三實施例注射暫停時，該卡扣件卡扣於該注射針筒之一抵推環部的狀態；及圖11是一不完整的局部剖視圖，說明該第三實施例注射暫停時，該卡齒卡扣於該抵推環部的狀態。 Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective exploded view illustrating a first embodiment of the injection syringe of the present invention; 2 is a partial cross-sectional view illustrating a state in which a buckle of the injection syringe is not buckled on a cylinder body during injection in the first embodiment; Fig. 3 is a view similar to Fig. 2 illustrating the state that the buckle member is buckled on the cylinder body when the injection of the first embodiment is completed; Figure 4 is a perspective exploded view illustrating a second embodiment of the injection syringe of the present invention; Fig. 5 is an incomplete partial cross-sectional view illustrating a state in which a buckle member of the injection syringe is not buckled on a cylinder body during injection in the second embodiment; Fig. 6 is a view similar to Fig. 5, illustrating the state that the buckle is buckled on the cylinder body when the injection is suspended in the second embodiment; Figure 7 is a perspective exploded view illustrating a third embodiment of the injection syringe of the present invention; Figure 8 is a partial cross-sectional view illustrating a state in which a buckle member of the injection syringe is not buckled on a cylinder body during injection in the third embodiment; Figure 9 is an incomplete partial cross-sectional view illustrating a state in which a tooth of the buckle passes through a hole of the injection syringe during injection in the third embodiment; 10 is a partial cross-sectional view illustrating the third embodiment when the injection is suspended, the buckle is buckled on the push ring part of the injection syringe; and Fig. 11 is an incomplete partial cross-sectional view illustrating the state of the clamping tooth being buckled on the pushing ring portion when the injection is suspended in the third embodiment.

1:筒體 1: cylinder

11:筒身部 11: Barrel

12:定位部 12: Positioning department

121:卡齒 121: card tooth

122:導斜面 122: Guide slope

123:抵擋面 123: Resistance

14:連接部 14: Connection part

2:活塞組件 2: Piston assembly

21:活塞桿 21: Piston rod

22:卡扣件 22: Clip

221:桿部 221: Pole

222:扣部 222: Buckle

5:導尿管 5: Catheter

Claims

一種注射針筒，包含：一個筒體；及一個活塞組件，包括一個可被前後推拉地往前插裝在該筒體中的活塞桿，及一個自該活塞桿後端往前突伸且位於該筒體外周側而用以可脫離地往後卡扣於該筒體的卡扣件；該筒體包括一個用以供該活塞桿往前插裝的筒身部，及一個凹設於該筒身部外周面的定位部，該定位部具有多個前後排列且用以供該卡扣件可脫離地往後卡扣定位的卡齒。 An injection syringe, comprising: a cylinder; and a piston assembly, including a piston rod that can be pushed and pulled forwards and inserted in the cylinder, and a piston rod that protrudes forward from the rear end of the piston rod and is located The outer circumference of the cylinder is used to detachably buckle back to the cylinder; the cylinder includes a cylinder for the piston rod to be inserted forward, and a recessed part in the cylinder The positioning part on the outer peripheral surface of the barrel part has a plurality of teeth arranged in front and rear and used for the buckling member to be detachably buckled and positioned backward.

如請求項1所述的注射針筒，其中，每一卡齒具有一個自該筒身部徑向往外並往前傾斜延伸而用以導引該卡扣件前後移動的導斜面，及一個由該導斜面前緣徑向往內延伸且用以供該卡扣件往後卡扣定位的抵擋面。 The injection syringe according to claim 1, wherein each of the teeth has a guide inclined surface extending radially outward and forward from the barrel to guide the buckle to move back and forth, and a guide The front edge of the guide slope extends radially inward and is used as a resisting surface for the buckle member to be buckled and positioned backward.

如請求項1或2所述的注射針筒，其中，該筒體還包括一個徑向突設於該筒身部後端之外周面的抵推環部，該抵推環部具有一個供該卡扣件可前後位移地穿置限位的穿孔。 The injection syringe according to claim 1 or 2, wherein the barrel further includes an abutment ring portion radially protruding from the outer peripheral surface of the rear end of the barrel portion, and the abutment ring portion has a The buckle can be moved back and forth through the limited perforation.

如請求項3所述的注射針筒，其中，該卡扣件具有一個自該活塞桿後端往前沿該筒身部外周側延伸的桿部，及一個自該桿部前端朝該筒身部突伸且用以可脫離地往後卡扣於該定位部的扣部，該穿孔具有一個沿該筒身部之徑向延伸且能供該桿部與該扣部穿伸通過的穿伸孔部，及一個由該穿伸孔部徑向外端相對該筒身部橫向延伸且僅能供該桿部穿伸通過的限位孔部。 The injection syringe according to claim 3, wherein the buckle has a rod portion extending from the rear end of the piston rod to the front edge of the outer circumference of the barrel portion, and a rod portion extending from the front end of the rod portion toward the barrel portion A buckle part that protrudes and is used to detachably buckle back on the positioning part. The through hole has a penetrating hole extending along the radial direction of the barrel part and capable of allowing the rod and the buckle part to penetrate through Department, and A limit hole part extending transversely from the radially outer end of the penetrating hole part relative to the cylinder body part and only allowing the rod part to penetrate therethrough.

一種注射針筒，包含：一個筒體；及一個活塞組件，包括一個可被前後推拉地往前插裝在該筒體中的活塞桿，及一個自該活塞桿後端往前突伸且位於該筒體外周側而用以可脫離地往後卡扣於該筒體的卡扣件；該筒體包括一個用以供該活塞桿往前插裝的筒身部，及一個徑向突設於該筒身部後端之外周面且具有一個前後貫穿之卡孔之抵推環部，該卡扣件具有多個前後排列之卡齒，且往前穿設於該卡孔並徑向往外或往內彈性偏擺靠抵於該卡孔孔緣，而以其中一卡齒可脫離地往後卡扣於該抵推環部前側面。 An injection syringe, comprising: a cylinder; and a piston assembly, including a piston rod that can be pushed and pulled forwards and inserted in the cylinder, and a piston rod that protrudes forward from the rear end of the piston rod and is located The cylinder body is used to detachably buckle back on the cylinder body on the peripheral side; the cylinder body includes a cylinder body for forward insertion of the piston rod, and a radial projection On the outer peripheral surface of the rear end of the barrel portion, there is a thrust ring portion with a front and rear through hole, the buckle has a plurality of front and rear teeth, and is penetrated forward in the hole and radially outward Or it can be elastically deflected inwardly to lean against the edge of the hole, and one of the teeth can be detachably buckled on the front side of the pushing ring part.

如請求項5所述的注射針筒，其中，該卡扣件還具有一個自該活塞桿後端往前沿該筒身部外周側延伸的桿部，及一個突設於該桿部之左右其中一側且具有該等卡齒的扣部，該卡孔具有一個相對於該筒身部徑向延伸且用以供該桿部往前穿設的調移孔部，及一個連通該調移孔部左右其中一側且用以供該扣部及該等卡齒往前穿設的定位孔部。 The injection syringe according to claim 5, wherein the buckle further has a rod portion extending from the rear end of the piston rod to the front edge of the outer peripheral side of the barrel portion, and a rod portion protruding from the left and right sides of the rod portion One side has a buckle portion with the clamping teeth, the clamping hole has an adjustment hole portion extending radially relative to the barrel portion and used for the rod portion to penetrate forward, and an adjustment hole connected to the adjustment hole One of the left and right side of the part is used for the positioning hole part for the buckle part and the teeth to penetrate forward.

如請求項6所述的注射針筒，其中，每一卡齒具有一個徑向朝外或朝內且往後傾斜突伸且用以靠抵於通過之該定位孔部孔緣的導斜面，及一個由該導斜面後緣往該筒身部外周面徑向朝內或朝外延伸且用以往後卡抵於該抵推環部前側面的抵擋面。 The injection syringe according to claim 6, wherein each tooth has a guide inclined surface protruding radially outward or inward and obliquely backward and used to abut against the edge of the positioning hole through which it passes, And one from the rear edge of the guide slope to the barrel The outer peripheral surface of the part extends radially inward or outward, and is used to resist the resisting surface of the front side of the push ring part.

如請求項5至7中任一項所述的注射針筒，其中，該卡扣件是以其後端部可徑向偏擺靠向或遠離該筒身部地樞設於該活塞桿後端，該活塞組件還包括一個設置於該活塞桿後端與該卡扣件之間，且恆具有驅使該卡扣件相對該活塞桿徑向偏擺靠向或遠離該筒身部之彈力的彈性件。 The injection syringe according to any one of claims 5 to 7, wherein the buckle is pivoted behind the piston rod so that its rear end can be deflected radially toward or away from the barrel The piston assembly further includes an elastic force which is arranged between the rear end of the piston rod and the buckle, and has an elastic force that drives the buckle to deflect radially toward or away from the barrel with respect to the piston rod. Elastic pieces.