IMPROVEMENTS IN AND RELATING TO A PEN-TYPE INJECTOR

摘要

The invention relates to a pen-type injector comprising a housing (2); a cartridge (4) containing medicinal product, the cartridge (4) being retained within the housing (2); means for selecting a dose of medicinal product to be expelled; means for expelling the selected dose of medicinal product.The housing (2) comprises a unitary housing within which the dose selecting means and the dose expelling means are moveably retained.