Classifications

• • 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
  • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
  • A61M5/3159—Dose expelling manners
  • A61M5/31593—Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir
  • A61M5/31595—Pre-defined multi-dose administration by repeated overcoming of means blocking the free advancing movement of piston rod, e.g. by tearing or de-blocking
• • 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
  • A61M5/31533—Dosing mechanisms, i.e. setting a dose
  • A61M5/31545—Setting modes for dosing
  • A61M5/31548—Mechanically operated dose setting member
  • A61M5/3156—Mechanically operated dose setting member using volume steps only adjustable in discrete intervals, i.e. individually distinct intervals
• • 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
  • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
  • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
  • A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod
  • A61M5/3158—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod performed by axially moving actuator operated by user, e.g. an injection button
• • 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
  • A61M5/31501—Means for blocking or restricting the movement of the rod or piston
  • A61M2005/31508—Means for blocking or restricting the movement of the rod or piston provided on the piston-rod
• • 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
  • A61M2205/00—General characteristics of the apparatus
  • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
  • A61M2205/581—Means for facilitating use, e.g. by people with impaired vision by audible feedback
• • 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
  • A61M5/31533—Dosing mechanisms, i.e. setting a dose
  • A61M5/31545—Setting modes for dosing
  • A61M5/31548—Mechanically operated dose setting member
  • A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
  • A61M5/31551—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe including axial movement of dose setting member
• • 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
  • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
  • A61M5/3159—Dose expelling manners
  • A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means

Definitions

• This patent relates to the improvement of injectors used not only in medical applications but also in any business requiring a wide range of liquid injection operations.
• An object of the present patent is to solve such a problem, that is, to provide an injector in which an inhalation amount can be accurately and simply fixed. That is.
• the injector according to the present application has a stopper which stops on the rear end face of the cylinder and limits the advance of the piston on the outer peripheral portion of the piston in the axial direction.
• the stopper at the forefront end of the stopper for locking the stopper on the piston of the injector that is movably mounted on the piston.
• FIG. 1 is a view showing the liquid sucked up to the maximum scale position
• Fig. 2 is one front of the maximum scale
• Fig. 3 is a state diagram before the liquid is sucked
• Fig. 4 is a state diagram when the liquid is sucked in an excessive amount from the maximum scale position.
• the injector i is composed of a piston 2, a stopper 3, and a cylinder 4.
• the piston 2 has, at its tip, a slidable and slidable tank 2a in contact with the inner surface of the cylinder 4 in a watertight manner, and a shaft 2b on the rear.
• Engagement grooves 5 perpendicular to ⁇ ⁇ are engraved at regular intervals in the axial direction on the outer peripheral surface of the eclipse 2b, and the engagement grooves 5
• a guide moving groove 6 is provided, and an operating flange 2c is provided at the rear end of the shaft portion 2b.
• stopper 3 has an outer diameter larger than the inner diameter of cylinder 14 described later.
• the cylindrical portion 3a has a projection 3b that engages with the engaging groove 5 of the female portion 2b of the screw 2 at the inside of the opening of the distal end surface of the cylindrical portion 3a.
• a flange 3c is provided at the rear end of the upper part 3a.
• the stopper 13 is attached to the outer periphery of the shaft 2b of the piston 2, and the axial movement of the stopper 2 is performed by rotating the stopper 2 or the stopper 3 by rotating the stopper 2.
• 3b should be moved to the vertical groove 6 after luxury work is performed at the position of the groove 6 of the Boston 2.
• An embodiment in which the groove 6 is not provided in the piston shaft portion 2b is also possible.
• the protrusion 3b of the stopper 13 may be made of a resin that is easily elastically deformed.
• the stopper is moved, the protrusion 3b is caught every time it joins the engaging groove 5 • '. It produces a click sound, which is extremely convenient for the blind.
• the cylinder 4 a cylinder 4 a for sucking the liquid 8, a needle tip 4 b at the tip of the cylinder 4 a, and a front surface of the stopper 3 at the rear end of the cylinder 4 a.
• the scale 7a in the scale 7a locks the projection 3b of the stopper 3 with the engagement guide 5a at the forefront of the piston section 2b.
• the front end face of the pan 2a is aligned with the position where the front end face of the pan 2a is moved when the piston 3 is moved until the front end face abuts against the cylinder flange 4c ( See Figure 1).
• the projection 3b of the stopper 3 is engaged with the engagement groove located at the center of the engagement groove 5 in the piston 2, the click response differs from the others. Or the use of landmarks will further improve usability.
• packin 2a draws piston 2 until it reaches the rear end that exceeds the maximum scale 7a of cylinder 4, and sucks liquid 8 into cylinder 14.
• the protrusion 3b of the stopper 3 is locked in the engagement groove 5 at a position corresponding to the required suction amount of the piston shaft 2b (see Fig. 4).
• FIG. 4 shows a case where the liquid 8 is sucked up to the position of the maximum scale 7a of the cylinder 4, and the projection 3b is locked in the engagement groove 5a at the forefront end. Liquid up to 7a position
• the projection 3b of 3 may be locked in the nth engagement groove from the foremost grandson groove 5a. After that, push the screw 2 until the front end face of the stainless steel plate 3 abuts against the rear end face of the cylinder-flange 4c, and suck the liquid to the maximum scale position as shown in Fig. 4. If you want to do so, the front end face of the piston packing 2a accurately advances to the maximum scale 7a position (see Fig. 1), and sucks the liquid up to the nth scale position before the maximum scale 7a. If you want to do so, the distance between each engagement groove 5 and the scale 7 and the distance between each scale 7 are set to be the same.
• the stopper is required so that the flange 3c comes into contact with the flange 2c. It is only necessary to push piston 2 at a stretch after retracting papper 3.
• the stopper 3 can be locked in the engaging groove corresponding to the required injection amount, and the stopper can be stopped. 3 works as a stopper not only for inhalation but also for infusion.

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)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=11634551

Family Applications (1)

Country Status (7)

Families Citing this family (17)

Citations (2)

Family Cites Families (12)

• 1986
  • 1986-01-20 JP JP1986006301U patent/JPS62119944U/ja active Pending
• 1987
  • 1987-01-16 FR FR8700484A patent/FR2593069A1/fr not_active Withdrawn
  • 1987-01-19 IT IT8719106A patent/IT1201163B/it active
  • 1987-01-19 WO PCT/JP1987/000031 patent/WO1987004353A1/ja unknown
  • 1987-01-20 GB GB08701142A patent/GB2187388A/en not_active Withdrawn
  • 1987-01-20 CH CH188/87A patent/CH672990A5/fr not_active IP Right Cessation
  • 1987-01-20 DE DE19873701500 patent/DE3701500A1/de not_active Withdrawn

Patent Citations (2)

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