Process for the production of an apparatus or instrument by overmolding and apparatus or instrument thus obtained

Process for the production of an electronic thermometer by total or partial overmolding of its functional constituent elements, and its electronic circuit components, which comprises:

• enclosing a card and the circuit components in an element in the form of a hollow cap (5) comprised of an upper part and a lower part assembled together by a zigzag connection, and substantially delimiting the volume and external shape of the thermometer;
• encapsulating a temperature detection module in a shell (11);
• placing said card bearing said circuit components, and the temperature detection module in an injection mold (4), said card being positioned in the mold by at least one wedge member (7) resting against an internal surface (4′) of the mold closed by a contact point, and by at least one wall portion (5′) of said element resting directly against the internal surface of the mold;
• then, after closing said mold, injecting a thermoplastic material (12) adapted to form the thermometer, and substantially covering the element in the form of a cap, except the wall portion (5′) in contact with the internal surface (4′) of the mold and a rear end portion (11′) of the shell (11) encapsulating said temperature detection module;
• and
• after solidification of the thermoplastic material, removing said thermometer from said mold.