Device for injection of a product, in particular for medical use

Device (1) for injection of a product, in particular for medical use, comprising:

• a body (2) receiving a hollow injection needle (4) and a container (10) containing the product to be injected;
• the needle (4) and container (10) being movable relative to said body between an injection position and a retracted position;
• means (5 to 7;
• 28, 29) for holding the needle in position, which means normally hold the needle (4) in said injection position, and which means can be released to permit movement of the needle (4) to said retracted position;
• means (39, 41, 45) for holding the container (10) in position, which means normally hold the container (10) in a position permitting injection, and which means can be released to permit movement of the container (10) to said retracted position;
• a piston (11) engaged in the container (10),
• characterized in that it additionally comprises:
• first actuating means (42) of means (5 to 7;
• 28, 29) for holding the needle (4) in the injection position,
• second actuating means (32) of means (39, 41, 45) for holding the container (10) in position,
• said first and second actuating means (42, 32) making it possible, at the end of the injection, to respectively release the means (5 to 7;
• 28, 29) for holding the needle (4) in the injection position before the release of the means (39, 41, 45) for holding the container (10) in position, or to simultaneously release the means (5 to 7;
• 28, 29) for holding the needle (4) in position and the means (39, 41, 45) for holding the container (10) in position,
• a container support (9) which is mounted slidably on the body (2) and is displaceable relative to the latter in order to perform the injection, said container (10) being connected to this support (9) and being able to move relative to the latter between a position permitting injection and a retracted position,
• means (3, 47, 48) for holding the container support (9) in position, which means normally hold the container support (9) in a standby position before the injection and can be released in order to permit displacement of the container support (9) and to permit injection,
• means (49) actuating the release of the means (3, 20, 47, 48) for holding the container support (9) permitting injection in position,
• wherein, said means (5 to 7;
• 28,29) for holding the needle (4) holds the needle (4) in the injection position with the container support (9) in the stanby position before the injection.