| 摘要 |
The present invention relates to a system for locking a dosing button in a device for the administration of a product to be injected in predetermined doses. This device comprises a body (1) with a housing (2) for the product, wherein a selected dose for injection is transported from said body out of a container (3) through a transport member (4). This device also comprises a drive member (5,7) for the transport member (4) as well as a dosing button (9) coupled to the drive member (5, 7) which is mounted so as to be capable of sliding within the body (1). The button ensures the transport of the selected dose when it is displaced from a first position into a second by actuating the drive member (5, 7). The dose is selected in the first position by rotating the dosing button (9) so that is can be moved from a first rotation position indicating that no transport is possible into a second rotation position. This device further comprises a first indicator sleeve (15) affixed to the body as well as a second indicator sleeve (17) capable of rotation together with the dosing button (9), wherein both sleeves include indication members (16, 18) for reading the selected dose according to the rotation position of said sleeves (15, 17) relative to each other. This device also comprises an anti-sliding member (11, 12, 13) which allows the dosing button to be moved from the first position into the second only when the indicator sleeves (15, 17) are placed in a zero position relative to each other thus indicating a "zero" dose. The anti-sliding member (11, 12, 13) can be unlocked by depressing on a trigger button (14), wherein the second indicator sleeve (17) releases the trigger button (14) for external access only when both indicator sleeves (15, 17) are at the zero position.
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