Abstract: The invention relates to a timepiece component, such as a balance (1), an oscillating mass (12) or a wheel (20), that comprises a structure (2) made according to a micro-manufacturing technique, such as the DRIE technique. The component is characterised in that it further comprises at least one member (3) formed in or at the periphery of the structure (2) and made of a material different from that of the structure (2). This member (3) is typically metal and is formed by electro-forming using a cavity (7) of the structure (2) as a mould.

Abstract: A balance spring—collet assembly for a timepiece movement comprises a collet (1) and a balance spring (3) attached at its inner end to the collet (1). The collet (1) is capable of being mounted onto a shaft (2). The external periphery of the collet (1) defines abutments (10a, 10b, 10c) against which the inner turn of the balance spring (3) may come to rest during a shock before the elastic limit of the inner turn is exceeded. The abutments (10a, 10b, 10c) are situated at respective distances (Ra, Rb, Rc) from the center (O) of the shaft (2) that increase in the direction (D) of the balance spring (3) from the inside to the outside starting at the point (8) of junction between the balance spring (3) and the collet (1).

Abstract: A regulating device including a balance (1) and a plane hairspring (2) for a time piece movement, the plane hairspring (2) including a stiffened portion (8) in its outer turn (7) that is arranged to cause the deformations of the turns to be substantially concentric. The spacing (d) between a terminal portion of the outer turn (7) and the last-but-one turn (9) of the hairspring (2) is large enough for said last-but-one turn (9) to remain free radially during expansions of the hairspring (2) up to amplitudes corresponding substantially to the maximum angle of rotation of the balance (1) in the movement.

Abstract: A regulating device including a balance (1) and a plane hairspring (2) for a time piece movement, the plane hairspring (2) including a stiffened portion (8) in its outer turn (7) that is arranged to cause the deformations of the turns to be substantially concentric. The spacing (d) between a terminal portion of the outer turn (7) and the last-but-one turn (9) of the hairspring (2) is large enough for said last-but-one turn (9) to remain free radially during expansions of the hairspring (2) up to amplitudes corresponding substantially to the maximum angle of rotation of the balance (1) in the movement.