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1. 发明公开

EP4230241A1 AUTOMATIC SYRINGE 审中-实审
公开(公告)号：EP4230241A1
公开(公告)日：2023-08-23
申请号：EP21878964.2
申请日：2021-05-24
申请人： Shandong Wego Prefills Pharmaceutical Packaging Co., Ltd.
发明人： NI, Shili , SUN, Xiaofeng , XU, Qianhe , LI, Wenzheng , LI, Zhifei
IPC分类号： A61M5/20
摘要： Provided is an automatic syringe, comprising: a housing (1), a needle guard cover (2), a push rod (3), a sounding cylinder (4), an inner tube (5), a release ring (6), a driving elastic member, and a resetting elastic member. During use, a needle cylinder (9) is fixed in the housing (1); a needle head (91) protrudes from the front of the housing (1); the needle guard cover (2) is retractably attached to the housing (1); the needle guard cover (2) can push the release ring (6) to slide toward the rear end of the housing (1); after the release ring (6) moves to the rear end, a first clip (55) of the inner tube (5) releases the snap-fit position-limiting of the push rod (3); the push rod (3) pushes a piston (93) under the action of the driving elastic member to inject the liquid in the needle cylinder (9) into a part of the body to be injected, achieving automatic injection. After the injection is complete, the sounding cylinder (4) disengages from the position-limiting of the inner tube (5) and slides toward the rear end of the housing (1), in order to issue a signal that the injection is complete. The automatic syringe of the present solution uses eight component parts to achieve the automatic injection function of the pre-filled needle cylinder; in comparison with the prior art, the present solution has a simple structure and a small number of components, is simple in its principle of mechanism action, and is highly reliable.

2. 发明公开

EP4324500A1 MULTI-DOSE ADJUSTABLE PRE-CHARGE INJECTION PEN 审中-实审
公开(公告)号：EP4324500A1
公开(公告)日：2024-02-21
申请号：EP21936742.2
申请日：2021-10-19
申请人： Shandong Wego Prefills Pharmaceutical Packaging Co., Ltd.
发明人： NI, Shili , SUN, Xiaofeng , XU, Qianhe , LI, Wenzheng , LI, Zhifei
IPC分类号： A61M5/178 , A61M5/24 , A61M5/31
摘要： A multi-dose adjustable pre-charge injection pen, comprising a pen body, an injection push rod (13), a push rod sleeve (7), a clutch hub (6), an end limiting member (8), and a dose hub (14). The injection push rod (13) is in threaded connection with the pen body; the push rod sleeve (7) and the injection push rod (13) are in sliding fit with each other in an injection direction and can transmit torque in a screwing-in direction of the injection push rod (13); the push rod sleeve (7) and the pen body are connected by means of a first set of ratchet pawl mechanism; the clutch hub (6) and the push rod sleeve (7) are in sliding fit with each other in the injection direction; the dose hub (14) is rotatably connected to the pen body by means of threads; rotation between the clutch hub (6) and the dose hub (14) is limited by a fastening structure capable of being disengaged from the injection direction; the end limiting member (8) and the dose hub (14) are supported by a supporting foot (83) capable of elastically deforming in the injection direction; the dose hub (14) can be rotated to push the fastening structure to be disengaged before the supporting foot (83) elastically deforms, thereby effectively solving the problem that an existing injection pen is inconvenient to operate and the dose adjustment effect is poor.

3. 发明公开

EP4215231A1 SAFETY DEVICE FOR PRE-FILLED SYRINGE AND INJECTION DEVICE 审中-实审
公开(公告)号：EP4215231A1
公开(公告)日：2023-07-26
申请号：EP21868101.3
申请日：2021-04-26
申请人： Shandong Wego Prefills Pharmaceutical Packaging Co., Ltd.
发明人： SUN, Xiaofeng , XU, Qianhe , PENG, Tongyi , LI, Wenzheng , LI, Zhifei
IPC分类号： A61M5/32
摘要： A safety device for a pre-filled syringe and an injection device; the inner wall of a device body (5) of the safety device is provided with a snap-fitting portion (10) and a bearing portion (5.1); a protective cover (6) is movably provided in the device body (5), and the protective cover (6) is provided with a hook claw (6.1) capable of being fitted with the snap-fitting portion (10) for positioning and a positioning base (6.4) for limiting the protective cover (6) from being separated from the device body (5); in a state where a needle tip (11) is covered by the protective cover (6), the hook claw (6.1) is separated from the snap-fitting portion (10), and the positioning base (6.4) is in contact with the bearing portion (5.1); a release ring (8) is movably provided in the device body (5), one end of the release ring (8) towards the protective cover (6) can separate the hook claw (6.1) from the snap-fitting portion (10) by pressing the hook claw (6.1), and the other end of the release ring (8) away from the protective cover (6) is a positioning surface used for being positioned in contact with a syringe flange (13.1); two ends of an elastic component (7) abut against the release ring (8) and the protective cover (6) respectively; and a stent (9) is connected to the device body (5), and the stent (9) is provided with an inner stent claw (9.2) for limiting the syringe flange (13.1) to move in the direction away from the release ring (8). The safety device does not interfere with the injection operation of the pre-filled syringe, and prevents the protective cover from popping up in advance.

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