Improvements in and relating to a dosing mechanism for a medicament delivery device
A technology of delivery device and dosage, applied in the direction of injection injector, hypodermic injection device, automatic injector, etc.
Inactive Publication Date: 2005-07-13
SANOFI AVENTIS DEUT GMBH
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, for known devices of this type, it is still difficult to display the dose of drug selected by adjusting the dial in numbers large enough and legible to be seen by users with a certain degree of visual impairment on the turning knob. question
Method used
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Embodiment Construction
[0017] Referring to the figures it can be seen a section through a drug delivery device 2 comprising a dose scale mechanism according to the invention. The drug delivery device 2 comprises a generally elongated housing 4 of generally cylindrical configuration. Located at the first end of the housing 4 is said dose scale mechanism comprising a dose scale member 6 and a scale sleeve member 8 .
[0018] Inside the second end of the housing is provided a cavity 10 within which a cartridge (not shown) can be retained. Those skilled in the art will recognize that the drug delivery device will include other elements not shown in the figures, including but not limited to a needle unit and a device for covering the needle when the drug delivery device is not in use. A cap that prevents the needle unit from injuring people due to negligence.
[0019] The first end of the housing is provided with a bore 12 of fixed diameter. Preferably, this diameter is smaller than the diameter of th...
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The present invention relates to a medicament delivery device such as an injector for self-administration of a medicament. Those using such devices are often infirm or have impaired vision. There is accordingly a dead for a medicament delivery device in which an amount of a dosage of medicament to be delivered can be selected relatively quickly by the firm and infirm alike and in which the amount of the dosage may readily be controlled and determined. Also there is a need to display the amount of the dialed dosage of medicament on the rotatable knob in figures sufficiently large and clear to be legible by those having a degree of impaired vision. There is disclosed a dose dial mechanism for a medicament delivery device having a housing, the dose dial mechanism comprising a dose dial element having a first thread for engagement with the housing and a dial sleeve member having a second thread for engagement with the housing; in which the dial sleeve member is coupled to the dose dial element so as to allow relative axial movement and inhibit relative rotational movement therebetween, and in which the pitch of the second thread is different from the pitch of the first thread so as to cause a different axial displacement of the dial sleeve member during axial displacement of the dose dial element.
Description
technical field [0001] The present invention relates to a drug delivery device, and in particular, but not exclusively, to a drug delivery device such as a syringe for self-administration. Such injectors include those known as pen-type injectors. Background technique [0002] In the past, for patients who need regular injections of medication, such as those diabetics who require insulin injections, it has been known to use a syringe to withdraw the required amount of medication from a vial and then use the syringe to inject the required amount of medication. the amount of drug needed. This approach has many disadvantages. These disadvantages include that filling a syringe in this manner is a job that requires accuracy and some skill, however, those patients with, for example, diabetes, are usually frail or visually impaired, and each of these factors Both increase the risk of inadvertent syringe sticks. In addition, the use of syringes in public places is becoming less a...
Claims
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IPC IPC(8): A61M5/20A61M5/315
CPCA61M5/31551A61M5/31558A61M5/31585A61M2005/3125A61M5/315A61M5/30
Inventor M·C·班顿
Owner SANOFI AVENTIS DEUT GMBH