A device for securing a first unit to a second unit , the device comprising: a first component including: a body and a head , the body having an elongated shape and being configured to be inserted in at least one of a first orifice of the first unit and a second orifice of the second unit , the head being connected to an upper longitudinal end of the body and including a part that is configured to be rotationally engaged by a tool ; a retainer at a lower longitudinal end of the body , the retainer being configured to bear against a lower surface of the second unit ; and a second component that is configured to couple to the first component , wherein at least one of the first and second components includes at least one cam surface and the other of the first and second components includes at least one follower configured to cooperate with the at least one cam surface , and to transform a rotational movement of the first component into a longitudinally-upwards translation movement of the first component in relation to the second component so that the retainer bears on the lower surface of the second unit , wherein the body comprises an elastic latch that is configured to cooperate with a complementary portion of one or both of the second component or the second unit so as to hold the first component in a depressed position in one or both of the second component or the second unit , wherein the head is longitudinally distanced from one or both of the second unit or the second component in the depressed position. a first component including: a body and a head , the body having an elongated shape and being configured to be inserted in at least one of a first orifice of the first unit and a second orifice of the second unit , the head being connected to an upper longitudinal end of the body and including a part that is configured to be rotationally engaged by a tool ; a retainer at a lower longitudinal end of the body , the retainer being configured to bear against a lower surface of the second unit ; and a body and a head , the body having an elongated shape and being configured to be inserted in at least one of a first orifice of the first unit and a second orifice of the second unit , the head being connected to an upper longitudinal end of the body and including a part that is configured to be rotationally engaged by a tool ; a retainer at a lower longitudinal end of the body , the retainer being configured to bear against a lower surface of the second unit ; and a second component that is configured to couple to the first component , wherein at least one of the first and second components includes at least one cam surface and the other of the first and second components includes at least one follower configured to cooperate with the at least one cam surface , and to transform a rotational movement of the first component into a longitudinally-upwards translation movement of the first component in relation to the second component so that the retainer bears on the lower surface of the second unit , wherein the body comprises an elastic latch that is configured to cooperate with a complementary portion of one or both of the second component or the second unit so as to hold the first component in a depressed position in one or both of the second component or the second unit , wherein the head is longitudinally distanced from one or both of the second unit or the second component in the depressed position. <EOS>