技术领域Technical Field
本发明涉及医疗器具技术领域，较为具体的，涉及到一种自动注射笔的安全锁装置和注射组件。The present invention relates to the technical field of medical instruments, and more specifically to a safety lock device and an injection assembly of an automatic injection pen.
背景技术Background technique
随着科技的发展，社会的进步，人们对于注射装置的使用提出了更高的需求，人们希望注射过程中，操作步骤简单，尽量避免误操作。实际操作时，患者在打开注射器外壳或拔出注射笔的笔帽后，往往因一些琐事影响，无法立即完成注射，此时患者会将注射装置的包装重新合上，或将注射笔的笔帽再次盖上，但注射装置的针头已经暴露在空气中，长时间静置状态会导致药液变质，同时造成交叉感染。另外在注射过程结束后，一旦未正确处理医疗耗材，操作者误将注射笔帽再次盖设在注射笔中，恢复注射笔注射前的原始状态，会造成一次性注射笔的重复使用。With the development of science and technology and the progress of society, people have put forward higher requirements for the use of injection devices. People hope that the operation steps are simple and misoperation is avoided as much as possible during the injection process. In actual operation, after the patient opens the syringe shell or pulls out the pen cap of the injection pen, it is often unable to complete the injection immediately due to some trivial matters. At this time, the patient will close the injection device package again or put the pen cap back on, but the needle of the injection device has been exposed to the air. Long-term static state will cause the drug solution to deteriorate and cause cross infection. In addition, after the injection process is completed, if the medical consumables are not handled correctly, the operator will mistakenly put the injection pen cap back on the injection pen to restore the original state of the injection pen before injection, which will cause the disposable injection pen to be reused.
例如，中国专利CN115554529A，公开了一种笔帽和注射组件，突台凸设在支撑柱的第二端，突台朝向支撑柱弯折，当笔帽本体盖设在注射笔上时，突台卡住针帽，在拔开笔帽本体的过程中，突台带动针帽而使针帽经开口与注射笔本体分离。For example, Chinese patent CN115554529A discloses a pen cap and injection assembly, in which a boss is convexly arranged at the second end of the support column, and the boss is bent toward the support column. When the pen cap body is covered on the injection pen, the boss clamps the needle cap. In the process of pulling off the pen cap body, the boss drives the needle cap to separate from the injection pen body through the opening.
根据国标YY-T1768关于医用针式注射系统的可靠性要求，需满足在自由坠落试验后，不能出现超过三个明显容器破裂，否则判定不合格。虽然很多产品满足此要求，但是在自由坠落试验后，产品的损坏，注射功能的失效，对于用户来说都是一种烦恼。According to the national standard YY-T1768 on the reliability requirements of medical needle injection systems, after a free fall test, no more than three obvious container ruptures must occur, otherwise it will be judged as unqualified. Although many products meet this requirement, product damage and failure of injection function after a free fall test are both a nuisance for users.
发明内容Summary of the invention
有鉴于此，本发明提出一种自动注射笔的安全锁装置和注射组件，包括笔帽1，所述笔帽1盖设在注射笔本体，所述注射笔本体包括外壳4，所述外壳4为圆筒状中空结构，所述外壳4的两端为近身端和远身端，所述外壳4内套设有针头保护套筒2，所述针头保护套筒2部分凸出所述外壳4的近身端，所述针头保护套筒2内套设有预灌封注射器模组5，所述笔帽1为桶状结构，在桶状结构的径向最外层为环形壁103，其特征在于：所述环形壁103内侧设有至少两个依次为围绕笔帽1中心轴线均匀分布的短悬臂102和长悬臂101，所述长悬臂101用于卡扣预灌封注射器模组5，所述短悬臂102远端位置设有凸出于短悬臂102表面的长凸环121，所述针头保护套筒2围绕轴向设置至少两个均匀分布的让位槽口201，所述外壳4的近身端的端部沿着轴线均匀分布至少两个半隐藏式槽401，自动注射笔组装完成后，所述短悬臂102正好置于其对应的半隐藏式槽401内且其长凸环121与其对应的让位槽口201卡接，实现阻挡功能，避免了注射笔的误激发，提高了注射笔使用前的可靠性。In view of this, the present invention proposes a safety lock device and injection assembly for an automatic injection pen, comprising a pen cap 1, the pen cap 1 is covered on the injection pen body, the injection pen body comprises a shell 4, the shell 4 is a cylindrical hollow structure, the two ends of the shell 4 are a proximal end and a distal end, a needle protection sleeve 2 is sleeved inside the shell 4, the needle protection sleeve 2 partially protrudes from the proximal end of the shell 4, a pre-filled syringe module 5 is sleeved inside the needle protection sleeve 2, the pen cap 1 is a barrel-shaped structure, and the radial outermost layer of the barrel-shaped structure is an annular wall 103, which is characterized in that: at least two inner sides of the annular wall 103 are arranged, which are uniformly distributed around the central axis of the pen cap 1 in sequence. The short cantilever 102 and the long cantilever 101, the long cantilever 101 is used to snap on the prefilled syringe module 5, the short cantilever 102 is provided with a long convex ring 121 protruding from the surface of the short cantilever 102 at the distal end, the needle protection sleeve 2 is provided with at least two evenly distributed make way slots 201 around the axial direction, and the proximal end of the shell 4 is evenly distributed with at least two semi-hidden slots 401 along the axis. After the automatic injection pen is assembled, the short cantilever 102 is just placed in its corresponding semi-hidden slot 401 and its long convex ring 121 is snapped with its corresponding make way slot 201, realizing the blocking function, avoiding the accidental activation of the injection pen, and improving the reliability of the injection pen before use.
一种自动注射笔的安全锁装置，包括笔帽1，所述笔帽1盖设在注射笔本体，所述注射笔本体包括外壳4，所述外壳4为圆筒状中空结构，所述外壳4的两端为近身端和远身端，所述外壳4内套设有针头保护套筒2，所述针头保护套筒2部分凸出所述外壳4的近身端，所述针头保护套筒2内套设有预灌封注射器模组5，所述笔帽1为桶状结构，在桶状结构的径向最外层为环形壁103，其特征在于：所述环形壁103内侧设有至少两个依次为围绕笔帽1中心轴线均匀分布的短悬臂102和长悬臂101，所述长悬臂101用于卡扣预灌封注射器模组5，所述短悬臂102远端位置设有凸出于短悬臂102表面的长凸环121，所述针头保护套筒2围绕轴向设置至少两个均匀分布的让位槽口201，所述外壳4的近身端的端部沿着轴线均匀分布至少两个半隐藏式槽401，自动注射笔组装完成后，所述短悬臂102正好置于其对应的半隐藏式槽401内且其长凸环121与其对应的让位槽口201卡接，实现阻挡功能。A safety lock device for an automatic injection pen comprises a pen cap 1, wherein the pen cap 1 is covered on an injection pen body, wherein the injection pen body comprises a shell 4, wherein the shell 4 is a cylindrical hollow structure, wherein the two ends of the shell 4 are a proximal end and a distal end, wherein a needle protection sleeve 2 is sleeved inside the shell 4, wherein the needle protection sleeve 2 partially protrudes from the proximal end of the shell 4, wherein a prefilled syringe module 5 is sleeved inside the needle protection sleeve 2, wherein the pen cap 1 is a barrel-shaped structure, wherein the radial outermost layer of the barrel-shaped structure is an annular wall 103, wherein the inner side of the annular wall 103 is provided with at least two holes which are arranged in sequence around the central axis of the pen cap 1 The short cantilever 102 and the long cantilever 101 are evenly distributed, and the long cantilever 101 is used to snap on the prefilled syringe module 5. The distal end of the short cantilever 102 is provided with a long convex ring 121 protruding from the surface of the short cantilever 102. The needle protection sleeve 2 is provided with at least two evenly distributed clearance notches 201 around the axial direction. The proximal end of the shell 4 is evenly distributed with at least two semi-hidden grooves 401 along the axis. After the automatic injection pen is assembled, the short cantilever 102 is just placed in its corresponding semi-hidden groove 401 and its long convex ring 121 is snapped with its corresponding clearance notch 201 to achieve a blocking function.
进一步的，所述短悬臂102在高度方向不凸出于环形壁103。Furthermore, the short cantilever 102 does not protrude from the annular wall 103 in the height direction.
进一步的，所述长凸环121的横截面的结构包括圆形、半圆形、椭圆形、三角形、梯形。Furthermore, the cross-sectional structure of the long protruding ring 121 includes a circle, a semicircle, an ellipse, a triangle, or a trapezoid.
在一些实施例中，在短悬臂102靠近环形壁103一侧壁面设有斜坡结构123，所述半隐藏式槽401的对应位置设有斜坡结构411，当自动注射笔组装完成时，所述短悬臂102的长凸环121插入针头保护套筒2的让位槽口201中，所述短悬臂102的斜坡结构123与所述外壳4的斜坡结构411对应，使短悬臂102可通过此导向过渡结构进入针头保护套筒2与外壳4之间的间隙，从而，使短悬臂102在自动注射笔的径向无法发生偏置。In some embodiments, a ramp structure 123 is provided on the wall surface of the short cantilever 102 on one side close to the annular wall 103, and a ramp structure 411 is provided at the corresponding position of the semi-hidden groove 401. When the automatic injection pen is assembled, the long convex ring 121 of the short cantilever 102 is inserted into the yielding groove 201 of the needle protection sleeve 2, and the ramp structure 123 of the short cantilever 102 corresponds to the ramp structure 411 of the outer shell 4, so that the short cantilever 102 can enter the gap between the needle protection sleeve 2 and the outer shell 4 through this guide transition structure, thereby preventing the short cantilever 102 from being offset in the radial direction of the automatic injection pen.
在一些实施例中，所述短悬臂102的延伸端设有远端面122，所述半隐藏式槽401的底部设有止位结构412，当自动注射笔组装完成后，所述短悬臂102的远端面122与外壳4的止位结构412对应设置，当笔帽1插入过度时，所述短悬臂102的远端面122抵住外壳4的止位结构412，实现阻挡功能。In some embodiments, the extended end of the short cantilever 102 is provided with a distal surface 122, and the bottom of the semi-hidden groove 401 is provided with a stop structure 412. When the automatic injection pen is assembled, the distal surface 122 of the short cantilever 102 is arranged corresponding to the stop structure 412 of the outer shell 4. When the pen cap 1 is excessively inserted, the distal surface 122 of the short cantilever 102 abuts against the stop structure 412 of the outer shell 4 to achieve a blocking function.
在一些实施例中，所述让位槽口201靠近近身端处设有止位结构211，当自动注射笔的近身端或者远身端与地面撞击时，所述针头保护套筒2的让位槽口201的止位结构211抵住短悬臂102的长凸环121的下沿，从而阻止针头保护套筒2继续向远身端移动，避免因为针头保护套筒2位移到达或超过激发位移而触发自动注射笔工作。In some embodiments, a stop structure 211 is provided near the proximal end of the yielding slot 201. When the proximal end or the distal end of the automatic injection pen collides with the ground, the stop structure 211 of the yielding slot 201 of the needle protection sleeve 2 presses against the lower edge of the long convex ring 121 of the short cantilever 102, thereby preventing the needle protection sleeve 2 from continuing to move toward the distal end, thereby avoiding triggering the automatic injection pen to work because the displacement of the needle protection sleeve 2 reaches or exceeds the excitation displacement.
在一些实施例中，所述预灌封注射器模组5靠近外壳4的近身端设有针头，所述针头处套设有护针套，所述长悬臂101在远端位置设有长凸环111，用于卡扣预灌封注射器模组5的护针套。In some embodiments, the prefilled syringe module 5 is provided with a needle at the proximal end close to the shell 4, and the needle is provided with a needle guard. The long cantilever 101 is provided with a long convex ring 111 at the distal end for snapping the needle guard of the prefilled syringe module 5.
进一步的，长悬臂101的外壁设有定位筋，所述针头保护套筒2对应位置处设有定位槽，当自动注射笔组装完成时，所述定位筋与定位槽匹配连接。Furthermore, the outer wall of the long cantilever 101 is provided with a positioning rib, and the needle protection sleeve 2 is provided with a positioning groove at a corresponding position. When the automatic injection pen is assembled, the positioning rib is matched and connected with the positioning groove.
进一步的，所述环形壁103的内壁设有多根筋位，所述多根筋位围绕环形壁103的中心间隔设置，所述外壳4的近身端的端部设有外圈端面，当自动注射笔组装完成时，所述筋位的下端面位于所述外圈端面的上部。Furthermore, the inner wall of the annular wall 103 is provided with a plurality of ribs, and the plurality of ribs are arranged at intervals around the center of the annular wall 103. The end of the proximal end of the shell 4 is provided with an outer ring end face. When the automatic injection pen is assembled, the lower end face of the rib is located on the upper part of the outer ring end face.
一种注射组件，包括注射笔本体，所述注射笔本体上设有开口，上述所述笔帽盖设在所述注射笔上，封闭所述开口，所述本体还包括针头保护套筒2、视窗3、外壳4、预灌封注射器模组5、注射推杆6、注射弹簧7、导向套筒8、触发套筒9、注射弹簧架10、返程弹簧11、触发信号环12、端盖13，所述外壳4内套设有针头保护套筒2，所述针头保护套筒2部分凸出所述外壳4的近身端，所述针头保护套筒2内套设有视窗3，所述视窗3内套设有预灌封注射器模组5，所述预灌封注射器模组5的底部套设有注射推杆6,所述注射推杆6能够在预灌封注射器模组5内滑动,所述注射推杆6内套设有注射弹簧7, 所述预灌封注射器模组5外部套设有针头保护套筒2,所述注射弹簧7内贯穿有注射弹簧架10,所述注射弹簧架10穿过注射弹簧7内部,使得注射弹簧7的一端与注射推杆6抵接,另一端与注射弹簧架10抵接;所述注射弹簧架10外部套接有导向套筒8,所述导向套筒8外套设有触发套筒9,所述触发套筒9的上端与针头保护套筒2抵接,下端设有触发信号环12和端盖13，所述触发套筒9外套设有返程弹簧11。An injection assembly comprises an injection pen body, the injection pen body is provided with an opening, the pen cap is arranged on the injection pen to close the opening, the body further comprises a needle protection sleeve 2, a window 3, a shell 4, a prefilled syringe module 5, an injection push rod 6, an injection spring 7, a guide sleeve 8, a trigger sleeve 9, an injection spring frame 10, a return spring 11, a trigger signal ring 12, and an end cover 13, the shell 4 is provided with a needle protection sleeve 2, the needle protection sleeve 2 partially protrudes from the proximal end of the shell 4, the needle protection sleeve 2 is provided with a window 3, the window 3 is provided with a prefilled syringe module 5, the bottom of the prefilled syringe module 5 is provided with an injection push rod 6, the injection push rod 6 can slide in the prefilled syringe module 5, the injection push rod 6 is provided with an injection spring 7, The prefilled syringe module 5 is externally sleeved with a needle protection sleeve 2, and an injection spring frame 10 is passed through the injection spring 7. The injection spring frame 10 passes through the injection spring 7, so that one end of the injection spring 7 abuts against the injection push rod 6, and the other end abuts against the injection spring frame 10; the injection spring frame 10 is externally sleeved with a guide sleeve 8, and the guide sleeve 8 is sleeved with a trigger sleeve 9, the upper end of the trigger sleeve 9 abuts against the needle protection sleeve 2, and the lower end is provided with a trigger signal ring 12 and an end cover 13, and the trigger sleeve 9 is sleeved with a return spring 11.
本发明的有益效果：本发明提出一种自动注射笔的安全锁装置和注射组件，包括笔帽1，所述笔帽1盖设在注射笔本体，所述注射笔本体包括外壳4，所述笔帽1为桶状结构，在桶状结构的径向最外层为环形壁103，所述环形壁103内侧设有至少两个依次为围绕笔帽1中心轴线均匀分布的短悬臂102和长悬臂101，所述长悬臂101用于卡扣预灌封注射器模组5，所述短悬臂102远端位置设有凸出于短悬臂102表面的长凸环121，所述针头保护套筒2围绕轴向设置至少两个均匀分布的让位槽口201，所述外壳4的近身端的端部沿着轴线均匀分布至少两个半隐藏式槽401，自动注射笔组装完成后，所述短悬臂102正好置于其对应的半隐藏式槽401内且其长凸环121与其对应的让位槽口201卡接，实现阻挡功能，避免了注射笔的误激发，提高了注射笔使用前的可靠性。Beneficial effects of the present invention: The present invention provides a safety lock device and injection assembly for an automatic injection pen, comprising a pen cap 1, the pen cap 1 is covered on an injection pen body, the injection pen body comprises a shell 4, the pen cap 1 is a barrel-shaped structure, the radial outermost layer of the barrel-shaped structure is an annular wall 103, the inner side of the annular wall 103 is provided with at least two short cantilevers 102 and a long cantilever 101 which are uniformly distributed around the central axis of the pen cap 1 in sequence, the long cantilever 101 is used to buckle the pre-filled syringe module 5, the distal end of the short cantilever 102 is located A long convex ring 121 is provided which protrudes from the surface of the short cantilever 102, and the needle protection sleeve 2 is provided with at least two evenly distributed make way slots 201 around the axial direction, and the end of the proximal end of the shell 4 is evenly distributed with at least two semi-hidden slots 401 along the axis. After the automatic injection pen is assembled, the short cantilever 102 is just placed in its corresponding semi-hidden slot 401 and its long convex ring 121 is engaged with its corresponding make way slot 201, thereby realizing the blocking function, avoiding the accidental activation of the injection pen, and improving the reliability of the injection pen before use.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明的自动注射笔的注射组件的爆炸图。FIG. 1 is an exploded view of the injection assembly of the automatic injection pen of the present invention.
图2为本发明的自动注射笔的笔帽的结构示意图。FIG. 2 is a schematic structural diagram of the pen cap of the automatic injection pen of the present invention.
图3为本发明的自动注射笔的针头保护套筒的结构示意图。FIG. 3 is a schematic structural diagram of the needle protection sleeve of the automatic injection pen of the present invention.
图4为本发明的自动注射笔的外壳的结构示意图。FIG. 4 is a schematic structural diagram of the housing of the automatic injection pen of the present invention.
图5为本发明的自动注射笔的注射组件的剖视图。FIG. 5 is a cross-sectional view of the injection assembly of the automatic injection pen of the present invention.
图6为本发明的自动注射笔的自动注射笔组装完成后的剖视图。FIG. 6 is a cross-sectional view of the automatic injection pen of the present invention after the automatic injection pen is assembled.
图7为本发明的自动注射笔的当自动注射笔的近身端或者远身端与地面撞击的剖视图。7 is a cross-sectional view of the automatic injection pen of the present invention when the proximal end or the distal end of the automatic injection pen collides with the ground.
图8为本发明的自动注射笔的在自动注射笔注射之前需要将笔帽拔出时的剖视图。FIG8 is a cross-sectional view of the automatic injection pen of the present invention when the pen cap needs to be pulled out before the automatic injection pen injects.
图9为本发明的自动注射笔的将笔帽拔出的过程的剖视图。FIG. 9 is a cross-sectional view of the process of pulling out the pen cap of the automatic injection pen of the present invention.
图10为本发明的自动注射笔的将笔帽拔出后的剖视图。FIG. 10 is a cross-sectional view of the automatic injection pen of the present invention after the pen cap is pulled out.
图11为图6的局部放大图A。FIG. 11 is a partial enlarged view A of FIG. 6 .
图12为图7的局部放大图B。FIG. 12 is a partial enlarged view B of FIG. 7 .
图13为图8的局部放大图C。FIG. 13 is a partial enlarged view C of FIG. 8 .
图14为图9的局部放大图D。FIG. 14 is a partial enlarged view D of FIG. 9 .
图15为图4的局部放大图E。FIG. 15 is a partial enlarged view E of FIG. 4 .
主要元件符号说明Main component symbols
笔帽1；长悬臂101；长凸环111；短悬臂102；长凸环121；远端面122；斜坡结构123；环形壁103；针头保护套筒2；让位槽口201；止位结构211；视窗3；外壳4；半隐藏式槽401；斜坡结构411；止位结构412；预灌封注射器模组5；注射推杆6；注射弹簧7；导向套筒8；触发套筒9；注射弹簧架10；返程弹簧11；触发信号环12；端盖13。Pen cap 1; long cantilever 101; long convex ring 111; short cantilever 102; long convex ring 121; distal surface 122; ramp structure 123; annular wall 103; needle protection sleeve 2; yielding notch 201; stop structure 211; window 3; housing 4; semi-hidden groove 401; ramp structure 411; stop structure 412; prefilled syringe module 5; injection push rod 6; injection spring 7; guide sleeve 8; trigger sleeve 9; injection spring frame 10; return spring 11; trigger signal ring 12; end cover 13.
如下具体实施方式将结合上述附图进一步说明本发明。The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings.
具体实施方式Detailed ways
实施例1:Embodiment 1:
如图2和图5所示，笔帽1具有容纳预灌封注射器模组5护针套的桶状结构，在桶状结构的径向最外层为环形壁103，环形壁103内侧依次为围绕笔帽1中心轴线均匀分布，数量分别不少于两个的短悬臂102和长悬臂101。短悬臂102在高度方向不凸出于环形壁103，短悬臂102远端位置具有长凸环121，凸环121具有凸出于短悬臂102表面的圆形、半圆形、椭圆形等可以实现阻挡和过渡位移的结构形式。同时，短悬臂102远端面122具有阻挡功能。在短悬臂102靠近环形壁103一侧壁面设有斜坡结构123。长悬臂101在远端位置具有长凸环111，具有卡扣预灌封注射器模组5护针套的功能。As shown in Figures 2 and 5, the pen cap 1 has a barrel-shaped structure for accommodating the needle guard of the prefilled syringe module 5. The radial outermost layer of the barrel-shaped structure is an annular wall 103. The inner side of the annular wall 103 is a short cantilever 102 and a long cantilever 101, which are uniformly distributed around the central axis of the pen cap 1, and the number is not less than two. The short cantilever 102 does not protrude from the annular wall 103 in the height direction. The short cantilever 102 has a long convex ring 121 at the distal end. The convex ring 121 has a circular, semicircular, elliptical, etc. structure that protrudes from the surface of the short cantilever 102 and can achieve blocking and transitional displacement. At the same time, the distal end surface 122 of the short cantilever 102 has a blocking function. A ramp structure 123 is provided on the wall surface of the short cantilever 102 close to the annular wall 103. The long cantilever 101 has a long convex ring 111 at the distal end, which has the function of buckling the needle guard of the prefilled syringe module 5.
如图3所示，针头保护套筒2围绕轴向具有不少于两个均匀分布的让位槽口201，此结构在产品组装完成后，与笔帽1的短悬臂102的长凸环121对应卡接。As shown in FIG. 3 , the needle protection sleeve 2 has at least two evenly distributed clearance notches 201 around the axial direction. After the product is assembled, this structure is correspondingly engaged with the long protruding ring 121 of the short cantilever 102 of the pen cap 1 .
如图4和图15所示，外壳4为圆筒状结构，在外壳4近身端的端部沿着轴线均匀分布不少于两个半隐藏式槽401，半隐藏式槽401具有斜坡结构411和止位结构412。As shown in FIG. 4 and FIG. 15 , the housing 4 is a cylindrical structure, and at least two semi-hidden grooves 401 are evenly distributed along the axis at the proximal end of the housing 4 . The semi-hidden grooves 401 have a slope structure 411 and a stop structure 412 .
接下来从自动注射笔的三个场景实例来提现本发明的创新和优势。Next, the innovation and advantages of the present invention are presented from three scenario examples of automatic injection pens.
场景一：包装完成Scenario 1: Packaging completed
如图6和图11所示，自动注射笔组装完成后，短悬臂102的长凸环121插入针头保护套筒2的让位槽口201中，短悬臂102的斜坡结构123与外壳4的斜坡结构411对应，使短悬臂102可通过此过渡结构进入针头保护套筒2与外壳4之间的间隙，从而，使短悬臂102在自动注射笔的径向无法发生偏置。短悬臂102的远端面122与外壳4的止位结构412对应，当笔帽1插入过度时，短悬臂102的远端面122抵住外壳4的止位结构412，实现阻挡功能。As shown in FIG6 and FIG11, after the automatic injection pen is assembled, the long convex ring 121 of the short cantilever 102 is inserted into the yielding notch 201 of the needle protection sleeve 2, and the slope structure 123 of the short cantilever 102 corresponds to the slope structure 411 of the shell 4, so that the short cantilever 102 can enter the gap between the needle protection sleeve 2 and the shell 4 through this transition structure, thereby preventing the short cantilever 102 from being offset in the radial direction of the automatic injection pen. The distal end surface 122 of the short cantilever 102 corresponds to the stop structure 412 of the shell 4. When the pen cap 1 is inserted excessively, the distal end surface 122 of the short cantilever 102 abuts against the stop structure 412 of the shell 4 to achieve a blocking function.
场景二：自由坠落试验Scenario 2: Free fall test
如图7和图12所示，当自动注射笔的近身端或者远身端与地面撞击时，笔帽1向远身端靠拢，当短悬臂102的远端面122抵住外壳4的止位结构412时，笔帽1与自动注射笔相对不发生相对运动。针头保护套筒2由于受到返程弹簧11的压力，自由状态下一直处于远离远身端。当自动注射笔的近身端或者远身端与地面撞击后发生反弹，传递给针头保护套筒2的惯性力超出返程弹簧11的压力时，针头保护套筒2向远身端移动，由于短悬臂102优先于针头保护套筒2与自动注射笔不发生相对运动。当针头保护套筒2的让位槽口201的止位结构211抵住短悬臂102的长凸环121的下沿（自由坠落时，自动注射笔分上下方向），从而阻止针头保护套筒2继续向远身端移动，避免因为针头保护套筒2位移到达或超过激发位移而触发自动注射笔工作。As shown in Figures 7 and 12, when the proximal end or distal end of the automatic injection pen collides with the ground, the pen cap 1 moves toward the distal end, and when the distal end surface 122 of the short cantilever 102 abuts against the stop structure 412 of the housing 4, the pen cap 1 and the automatic injection pen do not move relative to each other. The needle protection sleeve 2 is always away from the distal end in a free state due to the pressure of the return spring 11. When the proximal end or distal end of the automatic injection pen rebounds after colliding with the ground, and the inertial force transmitted to the needle protection sleeve 2 exceeds the pressure of the return spring 11, the needle protection sleeve 2 moves toward the distal end, and the short cantilever 102 takes precedence over the needle protection sleeve 2 and does not move relative to the automatic injection pen. When the stop structure 211 of the yielding slot 201 of the needle protection sleeve 2 presses against the lower edge of the long convex ring 121 of the short cantilever 102 (when falling freely, the automatic injection pen is divided into upper and lower directions), the needle protection sleeve 2 is prevented from continuing to move toward the distal end, thereby preventing the automatic injection pen from being triggered because the displacement of the needle protection sleeve 2 reaches or exceeds the excitation displacement.
场景三：自动注射过程Scenario 3: Automatic injection process
如图8和图13所示，在自动注射笔注射之前，需要将笔帽1拔出，笔帽1通过长悬臂101的长凸环111带动预灌封注射器模组5的护针套一起向近身端位移，笔帽1在拔出过程分为三步，第一步， 笔帽1短悬臂102远离远身端，短悬臂102的远端面122脱离外壳4的止位结构412，直至超出外壳4的近身端面，短悬臂102的长凸环121下沿抵住针头保护套筒2的让位槽口201的止位结构211，此时，短悬臂102已经脱离外壳4与针头保护套筒2之间的间隙，如图9和图14所示，短悬臂102通过向径向外侧偏置脱离针头保护套筒2的拔出方向限制，短悬臂102的长凸环121相切于针头保护套筒2的外壁面滑出，直至如图10所示，笔帽1携带预灌封注射器模组5的护针套与自动注射笔的本体完成分离。As shown in FIG8 and FIG13, before the automatic injection pen is injected, the pen cap 1 needs to be pulled out. The pen cap 1 drives the needle guard of the prefilled syringe module 5 to move toward the proximal end through the long convex ring 111 of the long cantilever 101. The pulling out process of the pen cap 1 is divided into three steps. The first step is: The short cantilever 102 of the pen cap 1 is away from the distal end, and the distal end surface 122 of the short cantilever 102 is separated from the stop structure 412 of the shell 4 until it exceeds the proximal end surface of the shell 4, and the lower edge of the long convex ring 121 of the short cantilever 102 abuts against the stop structure 211 of the yielding groove 201 of the needle protection sleeve 2. At this time, the short cantilever 102 has been separated from the gap between the shell 4 and the needle protection sleeve 2, as shown in Figures 9 and 14, and the short cantilever 102 is separated from the withdrawal direction restriction of the needle protection sleeve 2 by being biased radially outward, and the long convex ring 121 of the short cantilever 102 slides out tangent to the outer wall of the needle protection sleeve 2 until, as shown in Figure 10, the needle guard of the pen cap 1 carrying the prefilled syringe module 5 is separated from the main body of the automatic injection pen.
使用自动注射笔注射时，只需握住自动注射笔的外壳，将近身端贴在皮肤表面下压，直至针头保护套筒2到达触发位置，针头刺入皮肤，同时，注射弹簧7激发完成注射过程。When using the automatic injection pen for injection, one only needs to hold the shell of the automatic injection pen, press the proximal end against the skin surface until the needle protection sleeve 2 reaches the trigger position, the needle pierces the skin, and at the same time, the injection spring 7 is activated to complete the injection process.
如图1、图5所示，一种注射组件，包括注射笔本体，所述注射笔本体上设有开口，上述所述笔帽盖设在所述注射笔上，封闭所述开口，所述本体还包括针头保护套筒2、视窗3、外壳4、预灌封注射器模组5、注射推杆6、注射弹簧7、导向套筒8、触发套筒9、注射弹簧架10、返程弹簧11、触发信号环12、端盖13，所述外壳4内套设有针头保护套筒2，所述针头保护套筒2部分凸出所述外壳4的近身端，所述针头保护套筒2内套设有视窗3，所述视窗3内套设有预灌封注射器模组5，所述预灌封注射器模组5的底部套设有注射推杆6,所述注射推杆6能够在预灌封注射器模组5内滑动,所述注射推杆6内套设有注射弹簧7, 所述预灌封注射器模组5外部套设有针头保护套筒2,所述注射弹簧7内贯穿有注射弹簧架10,所述注射弹簧架10穿过注射弹簧7内部,使得注射弹簧7的一端与注射推杆6抵接,另一端与注射弹簧架10抵接;所述注射弹簧架10外部套接有导向套筒8,所述导向套筒8外套设有触发套筒9,所述触发套筒9的上端与针头保护套筒2抵接,下端设有触发信号环12和端盖13，所述触发套筒9外套设有返程弹簧11。As shown in Fig. 1 and Fig. 5, an injection assembly comprises an injection pen body, the injection pen body is provided with an opening, the pen cap is arranged on the injection pen to close the opening, the body further comprises a needle protection sleeve 2, a window 3, a shell 4, a prefilled syringe module 5, an injection push rod 6, an injection spring 7, a guide sleeve 8, a trigger sleeve 9, an injection spring frame 10, a return spring 11, a trigger signal ring 12, and an end cap 13, the shell 4 is provided with a needle protection sleeve 2, the needle protection sleeve 2 partially protrudes from the proximal end of the shell 4, the needle protection sleeve 2 is provided with a window 3, the window 3 is provided with a prefilled syringe module 5, the bottom of the prefilled syringe module 5 is provided with an injection push rod 6, the injection push rod 6 can slide in the prefilled syringe module 5, the injection push rod 6 is provided with an injection spring 7, The prefilled syringe module 5 is externally sleeved with a needle protection sleeve 2, and an injection spring frame 10 is passed through the injection spring 7. The injection spring frame 10 passes through the injection spring 7, so that one end of the injection spring 7 abuts against the injection push rod 6, and the other end abuts against the injection spring frame 10; the injection spring frame 10 is externally sleeved with a guide sleeve 8, and the guide sleeve 8 is sleeved with a trigger sleeve 9, the upper end of the trigger sleeve 9 abuts against the needle protection sleeve 2, and the lower end is provided with a trigger signal ring 12 and an end cover 13, and the trigger sleeve 9 is sleeved with a return spring 11.
本发明的有益效果：本发明提出一种自动注射笔的安全锁装置和注射组件，包括笔帽1，所述笔帽1盖设在注射笔本体，所述注射笔本体包括外壳4，所述笔帽1为桶状结构，在桶状结构的径向最外层为环形壁103，所述环形壁103内侧设有至少两个依次为围绕笔帽1中心轴线均匀分布的短悬臂102和长悬臂101，所述长悬臂101用于卡扣预灌封注射器模组5，所述短悬臂102远端位置设有凸出于短悬臂102表面的长凸环121，所述针头保护套筒2围绕轴向设置至少两个均匀分布的让位槽口201，所述外壳4的近身端的端部沿着轴线均匀分布至少两个半隐藏式槽401，自动注射笔组装完成后，所述短悬臂102正好置于其对应的半隐藏式槽401内且其长凸环121与其对应的让位槽口201卡接，实现阻挡功能，避免了注射笔的误激发，提高了注射笔使用前的可靠性。Beneficial effects of the present invention: The present invention provides a safety lock device and injection assembly for an automatic injection pen, comprising a pen cap 1, the pen cap 1 is covered on an injection pen body, the injection pen body comprises a shell 4, the pen cap 1 is a barrel-shaped structure, the radial outermost layer of the barrel-shaped structure is an annular wall 103, the inner side of the annular wall 103 is provided with at least two short cantilevers 102 and a long cantilever 101 which are uniformly distributed around the central axis of the pen cap 1 in sequence, the long cantilever 101 is used to buckle the pre-filled syringe module 5, the distal end of the short cantilever 102 is located A long convex ring 121 is provided which protrudes from the surface of the short cantilever 102, and the needle protection sleeve 2 is provided with at least two evenly distributed make way slots 201 around the axial direction, and the end of the proximal end of the shell 4 is evenly distributed with at least two semi-hidden slots 401 along the axis. After the automatic injection pen is assembled, the short cantilever 102 is just placed in its corresponding semi-hidden slot 401 and its long convex ring 121 is engaged with its corresponding make way slot 201, thereby realizing the blocking function, avoiding the accidental activation of the injection pen, and improving the reliability of the injection pen before use.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410607092.3ACN118416341B (en) | 2024-05-16 | 2024-05-16 | Safety lock device and injection assembly of automatic injection pen |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410607092.3ACN118416341B (en) | 2024-05-16 | 2024-05-16 | Safety lock device and injection assembly of automatic injection pen |
| Publication Number | Publication Date |
|---|---|
| CN118416341Atrue CN118416341A (en) | 2024-08-02 |
| CN118416341B CN118416341B (en) | 2024-11-05 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410607092.3AActiveCN118416341B (en) | 2024-05-16 | 2024-05-16 | Safety lock device and injection assembly of automatic injection pen |
| Country | Link |
|---|---|
| CN (1) | CN118416341B (en) |
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| US20120203186A1 (en)* | 2009-05-29 | 2012-08-09 | Patrick Vogt | Injection device with pricking protection and/or overload protection for a product container |
| CN209154759U (en)* | 2018-08-31 | 2019-07-26 | 上海久森医疗科技有限公司 | Automatically inject the locking mechanism and automatic injection pen of pen |
| CN113350628A (en)* | 2021-07-19 | 2021-09-07 | 苏州嘉树生物医疗科技有限公司 | Pen cap anti-drop structure for self-administration device |
| CN114828919A (en)* | 2020-02-24 | 2022-07-29 | 苏州恒瑞宏远医疗科技有限公司 | Two-step automatic injection device |
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| WO2023185602A1 (en)* | 2022-03-30 | 2023-10-05 | 苏州赛卫生物科技有限公司 | Automatic injection pen |
| CN117100947A (en)* | 2023-08-23 | 2023-11-24 | 苏州恒瑞宏远医疗科技有限公司 | Housing assembly for an automatic injection device, spacing and anti-triggering method |
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| US20240108815A1 (en)* | 2022-10-03 | 2024-04-04 | Becton Dickinson France | Autoinjector for Automatic Injection of a Product Into an Injection Site |
| CN117838988A (en)* | 2024-01-24 | 2024-04-09 | 苏州森恩博医疗科技有限公司 | A structure for preventing mis-triggering of an automatic injection pen |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120203186A1 (en)* | 2009-05-29 | 2012-08-09 | Patrick Vogt | Injection device with pricking protection and/or overload protection for a product container |
| CN209154759U (en)* | 2018-08-31 | 2019-07-26 | 上海久森医疗科技有限公司 | Automatically inject the locking mechanism and automatic injection pen of pen |
| CN114828919A (en)* | 2020-02-24 | 2022-07-29 | 苏州恒瑞宏远医疗科技有限公司 | Two-step automatic injection device |
| US20230390502A1 (en)* | 2020-10-16 | 2023-12-07 | Shandong Wego Prefills Pharmaceutical Packaging Co., Ltd | Automatic syringe |
| CN113350628A (en)* | 2021-07-19 | 2021-09-07 | 苏州嘉树生物医疗科技有限公司 | Pen cap anti-drop structure for self-administration device |
| WO2023185602A1 (en)* | 2022-03-30 | 2023-10-05 | 苏州赛卫生物科技有限公司 | Automatic injection pen |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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