A device (20, 20', 120) for securing a first unit (12, 12', 400) to a second unit (10, 10'), the device comprising: a first component (22, 22', 122) including: a body (26, 26') and a head (28, 28', 224), the body (26, 26') having an elongated shape and being configured to be inserted in at least one of a first orifice (12a, 12a', 402) of the first unit (12, 12', 400) and a second orifice (10a, 10a') of the second unit (10, 10'), the head (28, 28', 224) being connected to an upper longitudinal end of the body (26, 26') and including a part (40, 40', 226) that is configured to be rotationally engaged by a tool; a retainer (30, 130) at a lower longitudinal end of the body (26, 26'), the retainer (30, 130) being configured to bear against a lower surface (10b, 10b') of the second unit (10, 10'); and a second component (24, 24', 124) that is configured to couple to the first component (22, 22', 122), wherein at least one of the first and second components (22, 22', 122, 24, 24', 124) includes at least one cam surface (67a, 67a', 300) and the other of the first and second components (22, 22', 122, 24, 24', 124) includes at least one follower (44, 44', 144) configured to cooperate with the at least one cam surface (67a, 67a', 300), and to transform a rotational movement of the first component (22, 22', 122) into a longitudinally-upwards translation movement of the first component (22, 22', 122) in relation to the second component (24, 24', 124) so that the retainer (30, 130) bears on the lower surface (10b, 10b') of the second unit (10, 10'), wherein the body (26, 26') comprises an elastic latch (38, 38', 230) that is configured to cooperate with a complementary portion (56, 56', 301) of one or both of the second component (24, 24', 124) or the second unit (10, 10') so as to hold the first component (22, 22', 122) in a depressed position in one or both of the second component (24, 24', 124) or the second unit (10, 10'), wherein the head (28, 28', 224) is longitudinally distanced from one or both of the second unit (10, 10') or the second component (24, 24', 124) in the depressed position. a first component (22, 22', 122) including: a body (26, 26') and a head (28, 28', 224), the body (26, 26') having an elongated shape and being configured to be inserted in at least one of a first orifice (12a, 12a', 402) of the first unit (12, 12', 400) and a second orifice (10a, 10a') of the second unit (10, 10'), the head (28, 28', 224) being connected to an upper longitudinal end of the body (26, 26') and including a part (40, 40', 226) that is configured to be rotationally engaged by a tool; a retainer (30, 130) at a lower longitudinal end of the body (26, 26'), the retainer (30, 130) being configured to bear against a lower surface (10b, 10b') of the second unit (10, 10'); and a body (26, 26') and a head (28, 28', 224), the body (26, 26') having an elongated shape and being configured to be inserted in at least one of a first orifice (12a, 12a', 402) of the first unit (12, 12', 400) and a second orifice (10a, 10a') of the second unit (10, 10'), the head (28, 28', 224) being connected to an upper longitudinal end of the body (26, 26') and including a part (40, 40', 226) that is configured to be rotationally engaged by a tool; a retainer (30, 130) at a lower longitudinal end of the body (26, 26'), the retainer (30, 130) being configured to bear against a lower surface (10b, 10b') of the second unit (10, 10'); and a second component (24, 24', 124) that is configured to couple to the first component (22, 22', 122), wherein at least one of the first and second components (22, 22', 122, 24, 24', 124) includes at least one cam surface (67a, 67a', 300) and the other of the first and second components (22, 22', 122, 24, 24', 124) includes at least one follower (44, 44', 144) configured to cooperate with the at least one cam surface (67a, 67a', 300), and to transform a rotational movement of the first component (22, 22', 122) into a longitudinally-upwards translation movement of the first component (22, 22', 122) in relation to the second component (24, 24', 124) so that the retainer (30, 130) bears on the lower surface (10b, 10b') of the second unit (10, 10'), wherein the body (26, 26') comprises an elastic latch (38, 38', 230) that is configured to cooperate with a complementary portion (56, 56', 301) of one or both of the second component (24, 24', 124) or the second unit (10, 10') so as to hold the first component (22, 22', 122) in a depressed position in one or both of the second component (24, 24', 124) or the second unit (10, 10'), wherein the head (28, 28', 224) is longitudinally distanced from one or both of the second unit (10, 10') or the second component (24, 24', 124) in the depressed position.