CN110448765A - Piston component and syringe - Google Patents
Piston component and syringe Download PDFInfo
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- CN110448765A CN110448765A CN201910825971.2A CN201910825971A CN110448765A CN 110448765 A CN110448765 A CN 110448765A CN 201910825971 A CN201910825971 A CN 201910825971A CN 110448765 A CN110448765 A CN 110448765A
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- 238000007789 sealing Methods 0.000 claims abstract description 86
- 238000009434 installation Methods 0.000 claims description 49
- 210000002421 cell wall Anatomy 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 18
- 239000003814 drug Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31513—Piston constructions to improve sealing or sliding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
- A61M2005/3131—Syringe barrels specially adapted for improving sealing or sliding
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
技术领域technical field
本发明涉及医疗器械技术领域，特别涉及一种活塞组件和应用该活塞组件的注射器。The invention relates to the technical field of medical instruments, in particular to a piston assembly and a syringe using the piston assembly.
背景技术Background technique
注射器是一种常见的医疗用具，主要用于向人体注射药液，其一般包括针筒、滑动设置于针筒内的活塞、套设于活塞外侧的胶塞、以及连接于活塞的推杆。然而，现有技术中注射器的活塞外侧套设的胶塞体积较大，如此使得胶塞的生产材料大幅度提高，导致增加了注射器的制造成本。A syringe is a common medical appliance, mainly used for injecting liquid medicine into the human body, and generally includes a syringe, a piston slidably arranged in the syringe, a rubber stopper sleeved on the outside of the piston, and a push rod connected to the piston. However, in the prior art, the rubber plug sheathed on the outside of the piston of the syringe is relatively large in volume, so that the production material of the rubber plug is greatly increased, resulting in an increase in the manufacturing cost of the syringe.
上述内容仅用于辅助理解本申请的技术方案，并不代表承认上述内容是现有技术。The above content is only used to assist in understanding the technical solution of the present application, and does not mean that the above content is admitted as prior art.
发明内容Contents of the invention
本发明的主要目的是提供一种活塞组件，应用于注射器，旨在保证注射器的活塞和针筒之间的密封性，同时降低注射器的制造成本。The main object of the present invention is to provide a piston assembly, which is applied to a syringe, and aims at ensuring the sealing between the piston and the barrel of the syringe, and at the same time reducing the manufacturing cost of the syringe.
为实现上述目的，本发明提出的活塞组件包括：To achieve the above object, the piston assembly proposed by the present invention includes:
活塞，所述活塞滑动设于所述针筒内，所述活塞的外壁凹设有安装槽；和a piston, the piston is slidably arranged in the syringe, and the outer wall of the piston is concavely provided with a mounting groove; and
两密封件，两所述密封件嵌设于所述安装槽内，并沿所述针筒的轴向分布，两所述密封件抵接密封于所述活塞的外壁和所述针筒的内壁之间。Two seals, the two seals are embedded in the installation groove and distributed along the axial direction of the syringe, the two seals are abutted and sealed on the outer wall of the piston and the inner wall of the syringe between.
在本发明的一实施例中，所述活塞的外壁凹设有两个所述安装槽，一所述密封件嵌设于一所述安装槽内。In an embodiment of the present invention, the outer wall of the piston is recessed with two installation grooves, and one of the sealing elements is embedded in one of the installation grooves.
在本发明的一实施例中，所述安装槽的槽壁设有或者卡槽的其中之一，所述密封件设有卡块或者卡槽的其中之另一，所述卡块卡入所述卡槽内，使所述密封件连接于所述活塞。In an embodiment of the present invention, the groove wall of the installation groove is provided with one of the clamping grooves, and the sealing member is provided with the other of the clamping block or the clamping groove, and the clamping block is clamped into the The seal is connected to the piston in the card slot.
在本发明的一实施例中，所述卡块设于所述密封件面向所述安装槽槽底壁的一侧，所述卡槽设于所述安装槽的槽底壁。In an embodiment of the present invention, the clamping block is disposed on a side of the sealing member facing the bottom wall of the installation groove, and the clamping groove is disposed on the bottom wall of the installation groove.
在本发明的一实施例中，所述密封件的纵截面呈方形设置。In an embodiment of the present invention, the longitudinal section of the sealing member is arranged in a square shape.
在本发明的一实施例中，定义所述密封件嵌入所述安装槽内的深度为D1，1mm≤D1≤6mm。In an embodiment of the present invention, it is defined that the depth of the sealing member embedded in the installation groove is D 1 , where 1mm≦D 1 ≦6mm.
在本发明的一实施例中，定义所述密封件沿所述活塞的滑动方向上的厚度为D2，1mm≤D2≤7mm。In an embodiment of the present invention, the thickness of the sealing member along the sliding direction of the piston is defined as D 2 , where 1 mm≤D 2 ≤7 mm.
在本发明的一实施例中，定义所述密封件凸出所述活塞外壁的高度为D3，0.5mm≤D3≤1.5mm。In an embodiment of the present invention, the height of the sealing member protruding from the outer wall of the piston is defined as D 3 , where 0.5mm≦D 3 ≦1.5mm.
本发明还提出一种注射器，包括：The present invention also proposes a syringe, comprising:
针筒；Syringe;
活塞组件，所述活塞组件滑动设于所述针筒内，所述活塞组件包括活塞和两密封件，所述活塞滑动设于所述针筒内，所述活塞的外壁凹设有安装槽；两所述密封件嵌设于所述安装槽内，并沿所述针筒的轴向分布，两所述密封件抵接密封于所述活塞的外壁和所述针筒的内壁之间；以及A piston assembly, the piston assembly is slidably arranged in the syringe, the piston assembly includes a piston and two seals, the piston is slidably arranged in the syringe, and the outer wall of the piston is provided with a mounting groove; The two seals are embedded in the installation groove and distributed along the axial direction of the syringe, and the two seals are abutted and sealed between the outer wall of the piston and the inner wall of the syringe; and
推杆，所述推杆连接于所述活塞组件。A push rod, the push rod is connected to the piston assembly.
在本发明的一实施例中，所述针筒的内壁于筒口处设有倾斜面，在针筒的纵截面中，所述倾斜面之间的距离由所述针筒的筒底壁至所述针筒的筒口呈逐渐增大设置。In one embodiment of the present invention, the inner wall of the syringe is provided with an inclined surface at the nozzle, and in the longitudinal section of the syringe, the distance between the inclined surfaces is from the bottom wall of the syringe to the bottom wall of the syringe. The mouth of the syringe is set to gradually increase.
本发明的技术方案的活塞组件安装于注射器的针筒内时，通过活塞组件中的两密封件抵接密封于活塞组件中的活塞和针筒之间，从而实现了注射器中活塞和针筒之间的密封，而两个密封件的设置具有双重密封作用，如此进一步地保证了活塞和针筒之间的密封效果。同时，通过两个密封件代替了体积较大的胶塞，如此大幅度的减少了生产材料的使用，从而降低了注射器的制造成本。进一步的，活塞的外壁的安装槽的设置增大了两密封件和活塞之间的接触面积，从而提高了两者之间的密封性以及安装的稳定性。并且，在注射器的使用过程中，药液与活塞的端面直接接触，如此减小了药液与两密封件之间的接触面积，以减少药液由于与密封件接触产生的气泡，从而提高注射器使用的安全性。When the piston assembly of the technical solution of the present invention is installed in the syringe of the syringe, the two seals in the piston assembly are abutted and sealed between the piston and the syringe in the piston assembly, thereby realizing the connection between the piston and the syringe in the syringe. The sealing between the two seals has a double sealing effect, which further ensures the sealing effect between the piston and the syringe. At the same time, the large-volume rubber stopper is replaced by two sealing members, so that the use of production materials is greatly reduced, thereby reducing the manufacturing cost of the syringe. Further, the setting of the installation groove on the outer wall of the piston increases the contact area between the two seals and the piston, thereby improving the sealing performance between the two and the stability of installation. Moreover, during the use of the syringe, the liquid medicine is in direct contact with the end face of the piston, thus reducing the contact area between the liquid medicine and the two seals to reduce the bubbles generated by the liquid medicine in contact with the seals, thereby improving the performance of the syringe. Safety of use.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.
图1为本发明注射器一实施例的局部结构示意图；Fig. 1 is the partial structure schematic diagram of an embodiment of the syringe of the present invention;
图2为本发明注射器一实施例的局部剖面示意图；Fig. 2 is a partial cross-sectional schematic diagram of an embodiment of the syringe of the present invention;
图3为本发明活塞组件一实施例的剖面示意图；3 is a schematic cross-sectional view of an embodiment of the piston assembly of the present invention;
图4为本发明注射器的针筒的局部结构示意图。Fig. 4 is a schematic diagram of the partial structure of the barrel of the syringe of the present invention.
附图标号说明：Explanation of reference numbers:
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
需要说明，本发明实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.
在本发明中，除非另有明确的规定和限定，术语“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。In the present invention, unless otherwise specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, "fixation" can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
另外，在本发明中涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，全文中出现的“和/或”的含义为，包括三个并列的方案，以“A和/或B为例”，包括A方案，或B方案，或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。In addition, the descriptions involving "first", "second" and so on in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the meaning of "and/or" appearing in the whole text includes three parallel schemes, taking "A and/or B as an example", including scheme A, scheme B, or schemes satisfying both A and B. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.
本发明提出一种活塞组件，应用于注射器，注射器包括针筒。The invention provides a piston assembly, which is applied to a syringe, and the syringe includes a syringe.
请结合参考图1和图2，在本发明的一实施例中，该活塞组件200包括活塞210和两密封件220；其中，活塞210滑动设于针筒100内，活塞210的外壁凹设有安装槽211；两密封件220嵌设于安装槽211内，并沿针筒100的轴向分布，两密封件220抵接密封于活塞210的外壁和针筒100的内壁之间。Please refer to FIG. 1 and FIG. 2 in conjunction. In an embodiment of the present invention, the piston assembly 200 includes a piston 210 and two seals 220; wherein, the piston 210 is slidably arranged in the syringe 100, and the outer wall of the piston 210 is recessed. The installation groove 211 ; two seals 220 are embedded in the installation groove 211 and distributed along the axial direction of the syringe 100 , and the two seals 220 abut and seal between the outer wall of the piston 210 and the inner wall of the syringe 100 .
在本发明的一实施例中，活塞组件200和两密封件220的投影可以为圆形结构，当然也可以为方形结构，本申请对此不作限定，其具体形状可以根据针筒100内壁的形状来设置，保证活塞组件200和针筒100相适配即可。为了保证活塞210和针筒100内壁之间具有较好的密封效果，两密封件220的材质相对活塞210的材质较软。如此使得两密封件220在活塞210和针筒100内壁之间可以受到挤压而发生形变，同时产生一个形变方向相反的形变弹力，该形变弹力驱使密封件220恢复原状，使密封件220分别紧贴于活塞210的外壁以及针筒100的内壁，从而提高密封件220的密封效果。其中，密封件220的材质可以为橡胶或者硅胶，当然也可为其他弹性体；而活塞210的材质可以为丙烯腈-丁二烯-苯乙烯共聚物(Acrylonitrile Butadiene Styrene plastic，简称ABS)或聚碳酸酯(Polycarbonate，简称PC)，当然也可以为其他工程塑料材质，本申请对密封件220和活塞210的具体的材质不作限定。另外，安装槽211主要用于安装两密封件220，因此，安装槽211的数量可以是为一个，此时，两密封件220安装于一个安装槽211；当然，安装槽211的数量也可以是两个，此时，两密封件220在两安装槽211内择一安装，即一密封件220安装于一安装槽211内，本申请对此不作限定，能够实现密封件220的安装即可。In an embodiment of the present invention, the projections of the piston assembly 200 and the two seals 220 may be circular, or square, which is not limited in the present application, and its specific shape may be based on the shape of the inner wall of the syringe 100 To set it, it is sufficient to ensure that the piston assembly 200 and the syringe 100 are compatible. In order to ensure a better sealing effect between the piston 210 and the inner wall of the syringe 100 , the material of the two sealing members 220 is softer than that of the piston 210 . In this way, the two seals 220 can be squeezed and deformed between the piston 210 and the inner wall of the syringe 100, and at the same time, a deformation elastic force in the opposite direction of deformation is generated. Stick to the outer wall of the piston 210 and the inner wall of the syringe 100 to improve the sealing effect of the sealing member 220 . Wherein, the material of the sealing member 220 can be rubber or silica gel, and of course other elastic bodies; Carbonate (Polycarbonate, PC for short), of course, can also be made of other engineering plastic materials, and the application does not limit the specific materials of the sealing member 220 and the piston 210 . In addition, the installation groove 211 is mainly used to install the two seals 220, therefore, the number of the installation groove 211 can be one, at this time, the two seals 220 are installed in one installation groove 211; of course, the number of the installation groove 211 can also be Two, at this time, the two seals 220 are installed in one of the two installation grooves 211, that is, one seal 220 is installed in one installation groove 211, this application is not limited to this, as long as the seal 220 can be installed.
本发明的技术方案的活塞组件200安装于注射器的针筒100内时，通过活塞组件200中的两密封件220抵接密封于活塞组件200中的活塞210和针筒100之间，从而实现了注射器中活塞210和针筒100之间的密封，而两个密封件220的设置具有双重密封作用，如此进一步地保证了活塞210和针筒100之间的密封效果。同时，通过两个密封件220代替了体积较大的胶塞，如此大幅度的减少了生产材料的使用，从而降低了注射器的制造成本。进一步的，活塞210的外壁的安装槽211的设置增大了两密封件220和活塞210之间的接触面积，从而提高了两者之间的密封性以及安装的稳定性。并且，在注射器的使用过程中，药液与活塞210的端面直接接触，如此减小了药液与两密封件220之间的接触面积，以减少药液由于与密封件220接触产生的气泡，从而提高注射器使用的安全性。When the piston assembly 200 of the technical solution of the present invention is installed in the syringe barrel 100, the two seals 220 in the piston assembly 200 abut and seal between the piston 210 in the piston assembly 200 and the syringe barrel 100, thereby realizing The sealing between the plunger 210 and the syringe 100 in the syringe, and the arrangement of the two seals 220 have a double sealing effect, which further ensures the sealing effect between the piston 210 and the syringe 100 . At the same time, the rubber stopper with large volume is replaced by two sealing members 220, so that the use of production materials is greatly reduced, thereby reducing the manufacturing cost of the syringe. Further, the arrangement of the installation groove 211 on the outer wall of the piston 210 increases the contact area between the two seals 220 and the piston 210, thereby improving the sealing performance between the two and the stability of the installation. Moreover, during the use of the syringe, the liquid medicine is in direct contact with the end face of the piston 210, thus reducing the contact area between the liquid medicine and the two seals 220, so as to reduce the bubbles generated by the liquid medicine in contact with the seals 220, Thereby improving the safety of syringe use.
在本发明的一实施例中，活塞210的外壁凹设有两个安装槽211，一密封件220嵌设于一安装槽211内。In an embodiment of the present invention, the outer wall of the piston 210 is recessed with two installation grooves 211 , and a seal 220 is embedded in one installation groove 211 .
可以理解，每一安装槽211对位于该安装槽211内的密封件220具有限位作用，从而提高了两密封件220安装的稳定性。同时，两个安装槽211的设置也增大了密封件220和活塞210的接触面积，从而进一步地提高密封件220的密封效果。It can be understood that each installation groove 211 has a limiting effect on the seal 220 located in the installation groove 211 , thereby improving the stability of the installation of the two seals 220 . At the same time, the arrangement of the two installation grooves 211 also increases the contact area between the seal 220 and the piston 210 , thereby further improving the sealing effect of the seal 220 .
在本发明的一实施例中，安装槽211的槽壁设有或者卡槽212的其中之一，密封件220设有卡块221或者卡槽212的其中之另一，卡块221卡入卡槽212内，使密封件220连接于活塞210。In an embodiment of the present invention, the groove wall of the installation groove 211 is provided with one of the card slots 212, and the sealing member 220 is provided with the other of the card block 221 or the card slot 212, and the card block 221 is clipped into the card slot. Inside the groove 212 , the seal 220 is connected to the piston 210 .
可以理解，卡块221和卡槽212的配合进一步地增强密封件220和活塞210之间连接的稳定性，避免密封件220由于活塞210在针筒100内滑动而产生晃动，导致影响密封件220的密封效果。It can be understood that the cooperation between the locking block 221 and the locking groove 212 further enhances the stability of the connection between the sealing member 220 and the piston 210, and prevents the sealing member 220 from shaking due to the sliding of the piston 210 in the syringe 100, thus affecting the sealing member 220. sealing effect.
在本发明的一实施例中，卡块221设于密封件220面向安装槽211槽底壁的一侧，卡槽212设于安装槽211的槽底壁。In an embodiment of the present invention, the clamping block 221 is disposed on a side of the sealing member 220 facing the bottom wall of the installation groove 211 , and the locking groove 212 is disposed on the bottom wall of the installation groove 211 .
可以理解，将卡块221设于密封件220，卡槽212设于安装槽211的槽底壁，如此可以保证密封件220的强度，避免密封件220受自身强度的限制而影响卡块221和卡槽212的设置。而将卡块221设于密封件220面向安装槽211槽底壁的一侧，卡槽212设于安装槽211的槽底壁，如此使得密封件220的两相对侧壁和安装槽211的槽侧壁仍然保持紧贴的密封状态，从而在提高密封件220的安装的稳定性的同时保证了密封件220的密封效果。It can be understood that the block 221 is arranged on the sealing member 220, and the locking groove 212 is arranged on the groove bottom wall of the installation groove 211, so that the strength of the sealing member 220 can be ensured, and the sealing member 220 is prevented from being affected by the block 221 and the sealing member 220 due to the limitation of its own strength. The setting of the card slot 212. And the clamping block 221 is arranged on the side of the sealing member 220 facing the bottom wall of the installation groove 211, and the draw-in groove 212 is arranged on the bottom wall of the installation groove 211, so that the two opposite side walls of the sealing member 220 and the groove of the installation groove 211 The side wall still maintains a tight sealing state, thereby ensuring the sealing effect of the sealing member 220 while improving the installation stability of the sealing member 220 .
请参考图3，在本发明的一实施例中，密封件220的纵截面呈方形设置。Please refer to FIG. 3 , in an embodiment of the present invention, the longitudinal section of the sealing member 220 is arranged in a square shape.
可以理解，如此设置，使得密封件220在针筒100的轴向方向具有一定的距离，实现密封件220和针筒100内壁的面接触，避免了密封件220和针筒100内壁发生线接触，从而保证了密封件220的密封效果。It can be understood that such arrangement makes the sealing member 220 have a certain distance in the axial direction of the syringe 100, realizes surface contact between the sealing member 220 and the inner wall of the syringe 100, and avoids line contact between the sealing member 220 and the inner wall of the syringe 100, Thus, the sealing effect of the sealing member 220 is ensured.
在本发明的一实施例中，在本发明的一实施例中，定义密封件220嵌入安装槽211内的深度为D1，1mm≤D1≤6mm。In an embodiment of the present invention, in an embodiment of the present invention, it is defined that the depth of the sealing member 220 embedded in the installation groove 211 is D 1 , and 1mm≦D 1 ≦6mm.
可以理解，当安装槽211的深度D1＜1mm时，如此影响密封件220的安装的稳定性，同时也减小了密封件220和活塞210之间的接触面积，降低密封件220的密封效果。当安装槽211的深度D1＞6mm时，密封件220的内径和活塞210的外径相差过大，如此容易使得密封件220不便安装于活塞210件，影响密封件220的安装效率。因此，将安装槽211的深度D1设置为：1mm≤D1≤6mm，如此即可保证密封件220的密封效果，又便于密封件220的安装。其中，安装槽211的深度D1可以为1mm、2mm、3mm、4mm、5mm、6mm等，当然也可以为以上区间的任意取值，本申请对D1的具体指不作限定。It can be understood that when the depth D 1 of the installation groove 211 is less than 1 mm, the stability of the installation of the seal 220 is affected, and the contact area between the seal 220 and the piston 210 is also reduced, reducing the sealing effect of the seal 220 . When the depth D 1 of the installation groove 211 > 6mm, the difference between the inner diameter of the seal 220 and the outer diameter of the piston 210 is too large, so that the seal 220 is inconvenient to be installed on the piston 210 and affects the installation efficiency of the seal 220 . Therefore, the depth D 1 of the installation groove 211 is set as: 1mm≤D 1 ≤6mm, so as to ensure the sealing effect of the seal 220 and facilitate the installation of the seal 220 . Wherein, the depth D 1 of the installation groove 211 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, etc., of course, can also be any value in the above range, and the application does not limit the specific meaning of D 1 .
在本发明的一实施例中，定义密封件220沿活塞210的滑动方向上的厚度为D2，1mm≤D2≤7mm。In an embodiment of the present invention, the thickness of the sealing member 220 along the sliding direction of the piston 210 is defined as D 2 , where 1 mm≦D 2 ≦7 mm.
可以理解，当密封件220的厚度D2＜1mm时，使得密封件220和管道内壁之间的接触面积较小，导致影响密封件220的密封效果。当密封件220的厚度D2＞7mm时，使得密封件220和管道内壁之间的接触面积过大，导致密封件220和针筒100内壁之间的摩擦力增大，如此不便活塞组件200和针筒100内的滑动，同时也降低了密封件220的使用年限。因此，将密封件220的厚度D2设置为：1mm≤D2≤7mm，如此即可保证密封件220的密封效果，又可以保证密封件220和针筒100内壁之间的摩擦力大小合适，以便于活塞组件200在针筒100内的滑动。其中，密封件220的厚度D2可以为1mm、2mm、3mm、4mm、5mm、6mm、7mm等，当然也可以为以上区间的任意取值，本申请对D2的具体指不作限定。It can be understood that when the thickness D 2 of the sealing member 220 is less than 1 mm, the contact area between the sealing member 220 and the inner wall of the pipeline is small, which affects the sealing effect of the sealing member 220 . When the thickness D 2 of the sealing member 220 > 7 mm, the contact area between the sealing member 220 and the inner wall of the pipeline is too large, resulting in increased friction between the sealing member 220 and the inner wall of the syringe 100, which is inconvenient for the piston assembly 200 and Sliding within the barrel 100 also reduces the useful life of the seal 220 . Therefore, the thickness D 2 of the sealing member 220 is set as: 1 mm ≤ D 2 ≤ 7 mm, so that the sealing effect of the sealing member 220 can be ensured, and the frictional force between the sealing member 220 and the inner wall of the syringe 100 can be ensured to be appropriate. In order to facilitate the sliding of the piston assembly 200 in the syringe 100 . Wherein, the thickness D2 of the sealing member 220 can be 1mm, 2mm , 3mm, 4mm, 5mm, 6mm, 7mm, etc., and of course can be any value in the above range, and the specific meaning of D2 is not limited in this application.
在本发明的一实施例中，定义密封件220凸出活塞210外壁的高度为D3，0.5mm≤D3≤1.5mm。In an embodiment of the present invention, it is defined that the height of the seal 220 protruding from the outer wall of the piston 210 is D 3 , and 0.5 mm≤D 3 ≤1.5 mm.
可以理解，当密封件220凸出活塞210外壁的高度D3＜0.5mm时，使其与针筒100内壁之间的过盈量较小，导致其在受到针筒100内壁的挤压后发生的形变程度较小，进而产生的形变弹力也较小，在该较小的形变弹力驱使下，使得密封件220与针筒100内壁之间贴合程度降低，从而影响了密封件220的密封效果。当密封件220凸出活塞210外壁的高度D3＞1.5mm时，使其与针筒100内壁之间的过盈量较大，即密封件220的外径和针筒100的内径相差较大，导致活塞组件200难以安装进针筒100的内壁，降低活塞组件200的安装效果。因此，将密封件220凸出活塞210外壁的高度D3设置为：0.5mm≤D3≤1.5mm，如此即保证了密封件220的密封效果，又使得活塞组件200便于安装于针筒100内，提高安装效率。其中，密封件220凸出活塞210外壁的高度D3可以为0.5mm、0.6mm、0.7mm、0.8mm、0.9mm、1mm、1.1mm、1.2mm、1.3mm、1.4mm、1.5mm，当然也可以为以上区间的任意取值，本申请对D3的具体指不作限定。It can be understood that when the height D 3 of the sealing member 220 protruding from the outer wall of the piston 210 is less than 0.5mm, the interference between the sealing member 220 and the inner wall of the syringe 100 is small, causing it to occur after being squeezed by the inner wall of the syringe 100 The degree of deformation is small, and the deformation elastic force generated is also small. Driven by the small deformation elastic force, the degree of adhesion between the sealing member 220 and the inner wall of the syringe 100 is reduced, thereby affecting the sealing effect of the sealing member 220. . When the height D 3 of the seal 220 protruding from the outer wall of the piston 210 > 1.5mm, the interference between the seal 220 and the inner wall of the syringe 100 is relatively large, that is, the difference between the outer diameter of the seal 220 and the inner diameter of the syringe 100 is relatively large , causing the piston assembly 200 to be difficult to install into the inner wall of the syringe 100 , reducing the installation effect of the piston assembly 200 . Therefore, the height D 3 of the sealing member 220 protruding from the outer wall of the piston 210 is set as: 0.5mm≤D3≤1.5mm , so that the sealing effect of the sealing member 220 is ensured, and the piston assembly 200 is conveniently installed in the syringe 100 , Improve installation efficiency. Wherein, the height D3 of the sealing member 220 protruding from the outer wall of the piston 210 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, and of course It can be any value in the above range, and the application does not limit the specific meaning of D3 .
本发明还提出一种注射器，请参考图1，该注射器包括针筒100、活塞组件200以及推杆，该活塞组件200的具体结构参照上述实施例，由于本注射器采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。其中，活塞组件200滑动设于所述针筒100内；推杆连接于活塞组件200。The present invention also proposes a syringe, please refer to Fig. 1, the syringe includes a syringe 100, a piston assembly 200 and a push rod. The technical solution, therefore, at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be described here one by one. Wherein, the piston assembly 200 is slidably disposed in the syringe 100 ; the push rod is connected to the piston assembly 200 .
请参考图4，在本发明的一实施例中，针筒100的内壁于筒口处设有倾斜面，在针筒100的纵截面中，倾斜面之间的距离由针筒100的筒底壁至针筒100的筒口呈逐渐增大设置。Please refer to FIG. 4 , in an embodiment of the present invention, the inner wall of the syringe 100 is provided with an inclined surface at the mouth of the cylinder, and in the longitudinal section of the syringe 100, the distance between the inclined surfaces is determined by the bottom wall of the syringe 100 The barrel opening to the syringe 100 is set to gradually increase.
可以理解，倾斜面对活塞组件200安装于针筒100内具有对位导向作用，在该倾斜面的引导作用下，便于活塞组件200的准确安装，提高安装效率。其中，倾斜面可以是针筒100内壁于筒口处进行倒角而形成的；当然，也可以是针筒100内壁于邻近筒口形成阶梯状，两阶梯的连接处形成倾斜面，本申请对此不作限定，能够于筒口处形成有对活塞组件200具有导向作用的倾斜面即可。It can be understood that the installation of the inclined surface on the piston assembly 200 in the syringe 100 has a positioning and guiding effect. Under the guidance of the inclined surface, the accurate installation of the piston assembly 200 is facilitated and the installation efficiency is improved. Wherein, the inclined surface may be formed by chamfering the inner wall of the syringe 100 at the mouth of the barrel; of course, it may also be that the inner wall of the syringe 100 forms a stepped shape adjacent to the mouth of the barrel, and the junction of the two steps forms an inclined surface, which is not made in this application. It is limited that an inclined surface that can guide the piston assembly 200 can be formed at the barrel mouth.
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.
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| US6193695B1 (en) * | 2000-01-14 | 2001-02-27 | Wayland J. Rippstein, Jr. | Disposable safety syringe having a retractable needle |
| CN200970399Y (en) * | 2006-11-30 | 2007-11-07 | 阎侗有 | Advaned punching and blocking self destroy type safety injector |
| US20160129197A1 (en) * | 2013-06-05 | 2016-05-12 | Injecto A/S | Piston for use a syringe with specific dimensional ratio of a sealing structure |
| US20160151570A1 (en) * | 2013-07-10 | 2016-06-02 | Bayer Healthcare Llc | Vacuum system for a piston and syringe interface |
| CN205007384U (en) * | 2015-09-11 | 2016-02-03 | 深圳市安特高科实业有限公司 | Plug, piston assembly and syringe |
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| CN206045098U (en) * | 2016-05-27 | 2017-03-29 | 深圳市安特高科实业有限公司 | Syringe and syringe |
| US20180043102A1 (en) * | 2016-08-09 | 2018-02-15 | Becton, Dickinson And Company | O-Ring Plunger for a Prefilled Syringe and Method |
| CN109562226A (en) * | 2016-08-09 | 2019-04-02 | 贝克顿·迪金森公司 | The sealing structure and method of syringe |
| CN207041707U (en) * | 2017-09-12 | 2018-02-27 | 南阳医学高等专科学校第一附属医院 | A kind of syringe |
| CN208574099U (en) * | 2017-10-31 | 2019-03-05 | 广州友沃医疗设备有限公司 | A kind of high pressure injector syringe |
| CN208927277U (en) * | 2018-04-18 | 2019-06-04 | 山东济海医疗科技股份有限公司 | Built-up piston and its matching used high pressure injector |
| CN209173120U (en) * | 2018-04-18 | 2019-07-30 | 山东济海医疗科技股份有限公司 | High-pressure syringe piston and its matching used high pressure injector |
| CN211327472U (en) * | 2019-08-30 | 2020-08-25 | 深圳安特医疗股份有限公司 | Piston assembly and syringe |
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