技术领域technical field
本发明属于注射器领域，具体涉及一种用于连续多次定量注射的一次性注射器。The invention belongs to the field of syringes, in particular to a disposable syringe used for multiple continuous quantitative injections.
背景技术Background technique
传统的注射器主要是按照筒壁上的刻度来定量注射，由于操作者的视线和手速导致注射剂量控制不准确，会带来严重后果，例如在环形皮下麻醉时注射麻醉液，经常需要多次定量注射，过量中枢神经系统轻度毒性反应：嗜睡、眩晕、多语、惊恐和定向障碍；中度毒性反应：意识丧失、面肌四肢肌震颤、严重时脑电图出现癫痫波；重度中毒反应：由肌震颤发展为肌痉挛，抽搐、惊厥、呼吸困难、呼吸衰竭循环系统。Traditional syringes mainly inject quantitatively according to the scale on the barrel wall. Due to the operator's sight and hand speed, the injection dose control is inaccurate, which will bring serious consequences. Quantitative injection, excessive central nervous system mild toxic reactions: drowsiness, dizziness, multilingualism, panic and disorientation; moderate toxic reactions: loss of consciousness, tremors in facial muscles and limbs, and epilepsy waves in EEG in severe cases; severe toxic reactions : From muscle tremor to muscle spasm, convulsions, convulsions, dyspnea, respiratory failure and circulatory system.
因此亟需一种出液量的精确和可控注射器用于连续、多次、定量注射过程。Therefore, there is an urgent need for a precise and controllable syringe with a liquid output for continuous, multiple, quantitative injection processes.
发明内容Contents of the invention
本发明提供一种用于连续多次定量注射的一次性注射器，解决了现有技术中的由于操作者的视线和手速导致注射剂量控制不准确的技术问题，实现了连续、多次、定量注射，并且出液量的精确和可控。The invention provides a disposable syringe for continuous multiple quantitative injections, which solves the technical problem of inaccurate injection dose control due to the operator's sight and hand speed in the prior art, and realizes continuous, multiple, quantitative injections. Injection, and the liquid volume is precise and controllable.
本发明的目的通过如下技术方案实现：The purpose of the present invention is achieved through the following technical solutions:
一种用于连续多次定量注射的一次性注射器，包括针筒1和活塞杆2，活塞杆2的固定连接胶塞3的一端伸入到针筒1内，针筒1的一端的出液口连接有针头8，还包括出液量控制机构，所述的出液量控制机构包括阻挡机构、按压机构、一个压杆18、两个以上压针17和安装架；A disposable syringe for continuous multiple quantitative injections, including a syringe 1 and a piston rod 2, one end of the piston rod 2 fixedly connected to the rubber plug 3 extends into the syringe 1, and the liquid outlet of one end of the syringe 1 The mouth is connected with a needle 8, and also includes a liquid output control mechanism, and the liquid output control mechanism includes a blocking mechanism, a pressing mechanism, a pressing rod 18, more than two pressing needles 17 and a mounting frame;
所述的阻挡机构包括针筒1的外壁上的凹陷5、外盖7和活塞杆2上的阻挡片4，凹陷5的内部放置有与凹陷形状相同的橡胶垫6，橡胶垫6上覆盖有外盖7，外盖7与针筒1的外壁固定连接，并将橡胶垫6密封在外盖7和针筒1上的凹陷5之间，所述的外盖7上开设有圆形的通孔；The blocking mechanism includes a depression 5 on the outer wall of the syringe 1, an outer cover 7 and a blocking sheet 4 on the piston rod 2, the inside of the depression 5 is placed with a rubber pad 6 having the same shape as the depression, and the rubber pad 6 is covered with The outer cover 7, the outer cover 7 is fixedly connected with the outer wall of the syringe 1, and the rubber pad 6 is sealed between the outer cover 7 and the depression 5 on the syringe 1, and a circular through hole is opened on the outer cover 7 ;
所述的按压机构包括与所述的活塞杆2的另一端铰接的按压杆9，所述的按压杆9的另一端铰接有按压竖杆10，按压杆9与按压竖杆10垂直布置；The pressing mechanism includes a pressing rod 9 hinged with the other end of the piston rod 2, the other end of the pressing rod 9 is hinged with a pressing vertical rod 10, and the pressing rod 9 is vertically arranged with the pressing vertical rod 10;
所述的安装架包括上下两个连接横杆11，其分别固定连接在针筒的两端，两个连接横杆11之间依次垂直连接有两个压针固定杆12、弹性带13、压杆滑动轨道14和开设有压杆固定孔15的压杆固定杆16，所述的压针固定杆12与针筒1相邻，压针17穿过两个压针固定杆12的通孔，压针17的针头、针筒1上的外盖7通孔的中心点、压杆固定杆16上的压杆固定孔15的中心点在同一条水平线上，按压竖杆10贴紧压杆固定杆16的远离针筒的侧面；The mounting frame includes two upper and lower connecting cross bars 11, which are respectively fixedly connected to the two ends of the needle barrel, and two connecting cross bars 11 are vertically connected with two pressing needle fixing rods 12, elastic bands 13, pressing needles in sequence. The rod sliding track 14 and the pressing rod fixing rod 16 provided with the pressing rod fixing hole 15, the described needle pressing fixing rod 12 is adjacent to the needle cylinder 1, and the pressing needle 17 passes through the through holes of the two pressing needle fixing rods 12, The needle head of the pressure needle 17, the center point of the through hole of the outer cover 7 on the syringe 1, and the center point of the pressure rod fixing hole 15 on the pressure rod fixing rod 16 are on the same horizontal line, and the vertical rod 10 is pressed against the pressure rod to fix it the side of the rod 16 away from the syringe;
所述的压杆18由第一圆筒部19、第二圆筒部20和弹簧21组成，第一圆筒部19套置在第二圆筒部20的外壁上，弹簧21放置在第一圆筒部19和第二圆筒部20形成的中空部分内，第一圆筒部19的凸起放置在第二圆筒部20的凹槽内，第一圆筒部19的第二圆筒部20底部均为半圆球状；压杆18放置在压杆滑动轨道14的长方形通孔内，压杆一端抵靠在弹力带上，另一端伸入压杆固定孔15内；The pressure rod 18 is composed of a first cylindrical part 19, a second cylindrical part 20 and a spring 21, the first cylindrical part 19 is sleeved on the outer wall of the second cylindrical part 20, and the spring 21 is placed on the first cylindrical part 20. In the hollow part formed by the cylindrical part 19 and the second cylindrical part 20, the protrusion of the first cylindrical part 19 is placed in the groove of the second cylindrical part 20, and the second cylindrical part of the first cylindrical part 19 The bottom of the part 20 is semi-spherical; the pressure rod 18 is placed in the rectangular through hole of the pressure rod sliding track 14, and one end of the pressure rod leans against the elastic band, and the other end extends into the pressure rod fixing hole 15;
所述的安装架还包括固定弹性圈22，所述的固定弹性圈22套置在按压竖杆10和靠近针筒1的压针固定杆12上。The installation frame also includes a fixed elastic ring 22 , and the fixed elastic ring 22 is sleeved on the pressing vertical bar 10 and the pressing needle fixing bar 12 close to the needle cylinder 1 .
作为本发明更优的技术方案：活塞杆2上的阻挡片4到橡胶塞3的前端部的距离大于相邻的两个压针17之间的距离，避免压针17挡住橡胶塞3，或者橡胶塞3挡住压针17的推进。As a more optimal technical solution of the present invention: the distance from the blocking sheet 4 on the piston rod 2 to the front end of the rubber plug 3 is greater than the distance between two adjacent pressing pins 17, so as to prevent the pressing pins 17 from blocking the rubber plug 3, or The rubber stopper 3 blocks the advancement of the pressing needle 17.
作为本发明更优的技术方案：所述的压杆18的第一圆筒部19的凸起放置在第二圆筒部20的凹槽内。As a better technical solution of the present invention: the protrusion of the first cylindrical part 19 of the pressure rod 18 is placed in the groove of the second cylindrical part 20 .
作为本发明更优的技术方案：所述的安装架还包括固定弹性圈22，所述的固定弹性圈22套置在按压竖杆10和靠近针筒1的压针固定杆12上。As a better technical solution of the present invention: the mounting frame further includes a fixed elastic ring 22 , and the fixed elastic ring 22 is sleeved on the pressing vertical rod 10 and the needle pressing fixing rod 12 close to the needle barrel 1 .
作为本发明更优的技术方案：所述的压杆18和与针筒1的针头端固定连接的连接横杆11通过拉簧23连接。As a better technical solution of the present invention: said pressing rod 18 is connected with the connecting cross bar 11 fixedly connected with the needle end of the syringe 1 through a tension spring 23 .
作为本发明更优的技术方案：所述的压杆18的第一圆筒部19与弹性带接触面上固定连接有配重块。As a better technical solution of the present invention: a counterweight is fixedly connected to the contact surface between the first cylindrical portion 19 of the pressure rod 18 and the elastic belt.
作为本发明更优的技术方案：所述的压杆18上套置有两个安装片，两个安装片分别贴近压杆滑动轨道14的两个表面。As a better technical solution of the present invention: the pressure rod 18 is sleeved with two installation pieces, and the two installation pieces are respectively close to the two surfaces of the pressure rod sliding track 14 .
作为本发明更优的技术方案：所述的压杆固定孔15的下壁上固定连接有弹性缓冲片，弹性缓冲片可避免压杆撞击孔壁产生的较大抖动，避免推进器产生较大位移。As a better technical solution of the present invention: the lower wall of the pressure rod fixing hole 15 is fixedly connected with an elastic buffer sheet, which can avoid the large vibration caused by the pressure rod hitting the hole wall and prevent the propeller from producing a large vibration. displacement.
作为本发明更优的技术方案：所述的第一圆筒部19的外壁上有凸起，用于防止弹性带13的作用力将第一圆筒部1伸出压杆固定孔15的部分过多。As a more optimal technical solution of the present invention: there is a protrusion on the outer wall of the first cylindrical part 19, which is used to prevent the force of the elastic band 13 from extending the first cylindrical part 1 out of the pressure rod fixing hole 15. excessive.
有益效果如下：Beneficial effects are as follows:
1、本发明提供的注射器彻底避免了传统注射器使用时每次需调整注射器位置才能看到注射器的刻度，并且注射时需紧盯刻度带来的不便，更优异的效果是实现了连续、多次、定量注射，注射器每次注射时注射的量即为上下两个针之间的距离乘以针管的内径横截面积，出液量的精确和可控。1. The syringe provided by the present invention completely avoids the inconvenience caused by the need to adjust the position of the syringe every time the traditional syringe is used, and the need to keep an eye on the scale when injecting. The more excellent effect is to achieve continuous, multiple injections. , Quantitative injection, the amount injected by the syringe each time is the distance between the upper and lower needles multiplied by the inner diameter cross-sectional area of the needle tube, the liquid output is accurate and controllable.
2、本发明提供的注射器当活塞杆到最下方时难以回到初始状态，具有自毁特性，避免重复利用。2. The syringe provided by the present invention is difficult to return to the initial state when the piston rod is at the bottom, and has self-destruct characteristics to avoid repeated use.
3、本发明可以根据需求制作侧壁上压针的数量和之间的距离，使每次出液量在可控范围内，不需额外调节。3. The present invention can make the number of indenters on the side wall and the distance between them according to the requirements, so that the amount of liquid output each time is within a controllable range without additional adjustment.
综上所述：本发明提供的注射器解决了例如环形皮下麻醉时注射麻醉液等情况对注射器的精确性的需求，降低了医疗过程需要多次定量注射过程的繁琐性，避免了由于注射精确性不好出现的医疗事故，使用方便，可靠性高。In summary: the syringe provided by the present invention solves the need for the accuracy of the syringe such as injection of anesthetic fluid during circular subcutaneous anesthesia, reduces the cumbersomeness of the multiple quantitative injection process required in the medical process, and avoids the need for injection accuracy. It is not easy to cause medical accidents, easy to use and high in reliability.
附图说明Description of drawings
图1是本发明的一次性注射器的结构示意图；Fig. 1 is the structural representation of disposable syringe of the present invention;
图2是本发明的一次性注射器的结构示意图(未显示针筒)；Fig. 2 is a structural representation of the disposable syringe of the present invention (not showing the syringe);
图3是本发明的一次性注射器的压杆的剖视图；Fig. 3 is a cross-sectional view of the plunger of the disposable syringe of the present invention;
图4是本发明的一次性注射器的针筒的结构示意图；Fig. 4 is a schematic structural view of the syringe of the disposable syringe of the present invention;
图5是本发明的一次性注射器的针筒的结构示意图(未显示外盖和垫片)；Fig. 5 is a schematic structural view of the syringe of the disposable syringe of the present invention (the outer cover and gasket are not shown);
图6是本发明的一次性注射器的针筒的剖视图。Fig. 6 is a sectional view of the barrel of the disposable syringe of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明做进一步详细的说明。The present invention will be described in further detail below in conjunction with the accompanying drawings.
如图1和2所示，本发明提供一种用于连续多次定量注射的一次性注射器，包括针筒1、活塞杆2和出液量控制机构，活塞杆2的固定连接胶塞3的一端伸入到针筒1内，针筒1的一端的出液口连接有针头8，所述的出液量控制机构包括阻挡机构、按压机构、一个压杆18、两个以上压针17和安装架；所述的按压机构包括与所述的活塞杆2的另一端铰接的按压杆9，所述的按压杆9的另一端铰接有按压竖杆10，按压杆9与按压竖杆10垂直布置；所述的安装架包括上下两个连接横杆11，其分别固定连接在针筒的两端，两个连接横杆11之间依次垂直连接有两个压针固定杆12、弹性带13、压杆滑动轨道14和开设有压杆固定孔15的压杆固定杆16，压杆滑动轨道14为中间开设有长方形通孔的板状结构。所述的压针固定杆12与针筒1相邻，压针17穿过两个压针固定杆12的通孔，压针17的针头、针筒1上的外盖7通孔的中心点、压杆固定杆16上的压杆固定孔15的中心点在同一条水平线上，按压竖杆10贴紧压杆固定杆16的远离针筒的侧面。所述的安装架还包括固定弹性圈22，所述的固定弹性圈22套置在按压竖杆10和靠近针筒1的压针固定杆12上。所述的压杆18和与针筒1的针头端固定连接的连接横杆11通过拉簧23连接。所述的压杆18的第一圆筒部19与弹性带接触面上固定连接有配重块。所述的压杆18上套置有两个安装片，两个安装片分别贴近压杆滑动轨道14的两个表面。所述的压针17和对应的针筒19的外壁上的凹陷5的数量根据具体注射过程的需要确定。As shown in Figures 1 and 2, the present invention provides a disposable syringe for continuous multiple quantitative injections, including a syringe 1, a piston rod 2 and a liquid output control mechanism, and the piston rod 2 is fixedly connected to the rubber plug 3. One end extends into the syringe 1, and the liquid outlet at one end of the syringe 1 is connected with a needle 8. The liquid output control mechanism includes a blocking mechanism, a pressing mechanism, a pressing rod 18, more than two pressing needles 17 and Mounting frame; the pressing mechanism includes a pressing rod 9 hinged with the other end of the piston rod 2, the other end of the pressing rod 9 is hinged with a pressing vertical rod 10, and the pressing rod 9 is perpendicular to the pressing vertical rod 10 Arrangement; the mounting bracket includes two upper and lower connecting bars 11, which are respectively fixedly connected to the two ends of the needle barrel, and two connecting bars 11 are vertically connected with two needle pressing fixing bars 12 and elastic belts 13 in turn. , depression bar sliding track 14 and the depression bar fixing bar 16 that is provided with depression bar fixing hole 15, and depression bar sliding track 14 is the plate structure that offers the rectangular through hole in the middle. The needle fixing rod 12 is adjacent to the needle cylinder 1, and the pressure needle 17 passes through the through holes of the two needle fixing rods 12. , The center point of the pressure rod fixing hole 15 on the pressure rod fixing rod 16 is on the same horizontal line, and the pressing vertical rod 10 is close to the side of the pressure rod fixing rod 16 away from the needle cylinder. The installation frame also includes a fixed elastic ring 22 , and the fixed elastic ring 22 is sleeved on the pressing vertical rod 10 and the needle pressing fixing rod 12 close to the needle barrel 1 . The said pressing rod 18 is connected with the connecting cross bar 11 fixedly connected with the needle end of the syringe 1 through a tension spring 23 . A counterweight is fixedly connected to the contact surface between the first cylindrical portion 19 of the pressure rod 18 and the elastic belt. Two mounting pieces are sheathed on the pressure bar 18 , and the two mounting pieces are respectively close to the two surfaces of the sliding track 14 of the pressure bar. The number of the depressions 5 on the outer wall of the pressing needle 17 and the corresponding syringe 19 is determined according to the requirements of the specific injection process.
如图3所示，所述的压杆18由第一圆筒部19、第二圆筒部20和弹簧21组成，第一圆筒部19套置在第二圆筒部20的外壁上，弹簧21放置在第一圆筒部19和第二圆筒部20形成的中空部分内，第一圆筒部19的凸起放置在第二圆筒部20的凹槽内，第一圆筒部19的第二圆筒部20底部均为半圆球状；压杆18放置在压杆滑动轨道14的长方形通孔内，压杆一端抵靠在弹力带上，另一端伸入压杆固定孔15内。所述的第一圆筒部1的外壁上有凸起，所述的凸起位于半圆球状的底面的边缘，用于防止弹性带13的作用力将第一圆筒部1伸出压杆固定孔15的部分过多。As shown in Figure 3, the pressure rod 18 is composed of a first cylindrical portion 19, a second cylindrical portion 20 and a spring 21, the first cylindrical portion 19 is sleeved on the outer wall of the second cylindrical portion 20, The spring 21 is placed in the hollow formed by the first cylindrical part 19 and the second cylindrical part 20, the protrusion of the first cylindrical part 19 is placed in the groove of the second cylindrical part 20, and the first cylindrical part The bottom of the second cylindrical portion 20 of 19 is semi-spherical; the pressure rod 18 is placed in the rectangular through hole of the pressure rod sliding track 14, one end of the pressure rod leans against the elastic band, and the other end extends into the pressure rod fixing hole 15 . There is a protrusion on the outer wall of the first cylindrical part 1, and the protrusion is located on the edge of the hemispherical bottom surface, and is used to prevent the force of the elastic band 13 from extending the first cylindrical part 1 out of the pressure rod and fixing it The portion of hole 15 is too much.
如图4-6所示，所述的阻挡机构包括针筒1的外壁上的凹陷5、外盖7和活塞杆2上的阻挡片4，凹陷5的内部放置有与凹陷形状相同的橡胶垫6，橡胶垫6上覆盖有外盖7，外盖7与针筒1的外壁固定连接，并将橡胶垫6密封在外盖7和针筒1上的凹陷5之间，所述的外盖7上开设有圆形的通孔。As shown in Figures 4-6, the blocking mechanism includes a depression 5 on the outer wall of the syringe 1, an outer cover 7 and a blocking sheet 4 on the piston rod 2, and a rubber pad with the same shape as the depression is placed inside the depression 5 6. The rubber pad 6 is covered with an outer cover 7, the outer cover 7 is fixedly connected with the outer wall of the syringe 1, and the rubber pad 6 is sealed between the outer cover 7 and the depression 5 on the syringe 1, the outer cover 7 A circular through hole is opened on the top.
所述的压杆固定孔15的下壁上固定连接有弹力缓冲片，由于拉簧23的拉力和压杆18的重力，尤其是在第一圆筒部19的底端连接配重块后，两个力同时作用会使压杆18产生一个比较大的速度，压杆18在到达压杆固定孔15的时会撞击压杆固定孔15的下壁，注射器整体会产生抖动，弹力缓冲片使压杆18撞击压杆固定孔15的下壁时被缓冲，减少整体的抖动。The lower wall of the pressure rod fixing hole 15 is fixedly connected with an elastic buffer piece. Due to the pulling force of the extension spring 23 and the gravity of the pressure rod 18, especially after the counterweight is connected to the bottom end of the first cylindrical part 19, The simultaneous action of the two forces will cause the pressure rod 18 to produce a relatively large speed. When the pressure rod 18 reaches the pressure rod fixing hole 15, it will hit the lower wall of the pressure rod fixing hole 15, and the syringe as a whole will vibrate. When the pressing rod 18 collides with the lower wall of the pressing rod fixing hole 15, it is buffered to reduce overall shaking.
本发明的一次性注射器具体工作过程如下：The specific working process of the disposable syringe of the present invention is as follows:
使用者向远离针筒方向拉动推杆吸入待注射的液体后，将按压竖杆10用固定弹性圈22用与压针固定杆12套置固定。After the user pulls the push rod away from the syringe to inhale the liquid to be injected, the pressing vertical rod 10 is fixed with the fixed elastic ring 22 and the needle pressing rod 12 is sleeved and fixed.
连续多次定量使用时，按压活塞杆2顶端铰接的按压杆9，进而按压竖杆10向下移动，由于固定弹性圈23的作用，按压竖杆10在贴紧压杆固定杆16的条件下向下移动，移动到压杆固定杆16上的第一个压杆固定孔15处。When using quantitatively for many times in a row, press the pressing rod 9 hinged at the top of the piston rod 2, and then press the vertical rod 10 to move downward. Move down, move to the first pressure rod fixing hole 15 on the pressure rod fixing rod 16.
此时的压杆18的状态是在弹性带13的给的垂直于压杆固定杆16方向的力，压杆18的第二圆筒部20的底面上的半球部伸入到压杆固定孔15。The state of the depression bar 18 at this time is the force perpendicular to the direction of the depression bar fixing rod 16 given by the elastic band 13, and the hemispherical part on the bottom surface of the second cylindrical part 20 of the depression rod 18 stretches into the depression rod fixing hole. 15.
按压竖杆10推动压杆18，压杆18的第二圆筒部20的内壁挤压弹簧21收缩，第二圆筒部20向弹性带13的方向移动，半球部的底面运动至压杆固定杆16的靠近针筒1的一面后继续向针筒方向运动，直到压杆18整体在重力或弹簧23提供的弹力的作用下向下滑动，并且约束压杆滑动轨道14内，安装片可约束压杆位于与滑动轨道垂直的线上滑动至下一个压杆固定孔15处，第二圆筒部20在弹簧21和弹性带的作用下进入压杆固定孔15，凸起抵靠在压杆固定孔15靠近针筒1的一面，防止第二圆筒部20进入压杆固定孔15过多，同时压杆18向下滑动的过程中给弹性带13压力，进而弹性带13给其另一侧的伸出远离针筒1的压针固定杆12的压针17的端部压力，使压针17向针筒1方向移动，压针17伸入对应的固定在针筒1外壁上的外盖7通孔，再依次扎破橡胶垫6和凹陷5的底部进入针筒1内部，活塞杆2上一体成型的阻挡片4的接触到伸入针筒内的压针17后，使用者会感觉到阻力停止注射。Press the vertical rod 10 to push the pressure rod 18, the inner wall of the second cylindrical part 20 of the pressure rod 18 shrinks the extrusion spring 21, the second cylindrical part 20 moves in the direction of the elastic band 13, and the bottom surface of the hemispherical part moves until the pressure rod is fixed. The side of the rod 16 close to the syringe 1 continues to move towards the direction of the syringe until the pressure rod 18 as a whole slides downward under the action of gravity or the elastic force provided by the spring 23, and constrains the sliding track 14 of the pressure rod, and the mounting piece can constrain The pressure rod is located on a line perpendicular to the sliding track and slides to the next pressure rod fixing hole 15, the second cylindrical part 20 enters the pressure rod fixing hole 15 under the action of the spring 21 and the elastic belt, and the protrusion abuts against the pressure rod The fixing hole 15 is close to the side of the syringe 1 to prevent the second cylindrical part 20 from entering the fixing hole 15 of the pressing bar too much. At the same time, the pressing bar 18 will press the elastic band 13 during the downward sliding process, and then the elastic band 13 will give it another The end pressure of the pressure needle 17 of the pressure needle fixing rod 12 extending away from the needle cylinder 1 makes the pressure needle 17 move to the direction of the needle cylinder 1, and the pressure needle 17 extends into the corresponding outer wall fixed on the outer wall of the needle cylinder 1. cover 7 through holes, and then puncture the rubber pad 6 and the bottom of the depression 5 to enter the interior of the syringe 1. After the integrally formed blocking sheet 4 on the piston rod 2 touches the pressing needle 17 extending into the syringe, the user will Stop injection when resistance is felt.
再次按压活塞杆2顶端铰接的按压杆9，压杆18如以上的动作下移，上一位置处的弹性带13带动固定连接在表面上的压针17后移，压针17给活塞杆2前端的阻力消失，使用者推动活塞杆2继续运动至下一压针17伸入针筒的位置，进行又一次的定量注射，以此类推直至注射过程完成。Press the pressing rod 9 hinged at the top of the piston rod 2 again, and the pressing rod 18 will move down as above, and the elastic band 13 at the previous position will drive the pressing pin 17 fixedly connected to the surface to move backward, and the pressing pin 17 will give the piston rod 2 The resistance at the front end disappears, and the user pushes the piston rod 2 to continue moving to the next position where the pressing needle 17 extends into the syringe, and performs another quantitative injection, and so on until the injection process is completed.
综上所述，本发明提供的一次性注射器实现了精确的连续、多次、定量注射，并且结构简单，使用可靠性高。To sum up, the disposable syringe provided by the present invention realizes accurate continuous, multiple and quantitative injection, and has a simple structure and high reliability in use.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910373641.4ACN109966588B (en) | 2019-05-07 | 2019-05-07 | Disposable injector for continuous multiple quantitative injection |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910373641.4ACN109966588B (en) | 2019-05-07 | 2019-05-07 | Disposable injector for continuous multiple quantitative injection |
| Publication Number | Publication Date |
|---|---|
| CN109966588A CN109966588A (en) | 2019-07-05 |
| CN109966588Btrue CN109966588B (en) | 2019-10-25 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910373641.4AExpired - Fee RelatedCN109966588B (en) | 2019-05-07 | 2019-05-07 | Disposable injector for continuous multiple quantitative injection |
| Country | Link |
|---|---|
| CN (1) | CN109966588B (en) |
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| CN109966588A (en) | 2019-07-05 |
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| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20191025 Termination date:20210507 |