A variation reduction mechanism of a stop position of a pointer includes a return gear that is driven in conjunction with a time display mechanism, a slip torque spring (friction member) that contacts the return gear to apply a friction force to the return gear to be driven, and a return spring (return spring member) that applies, to the slip torque spring, a torque of the return gear in a direction (dashed line arrowR direction) opposite to a normal hand movement direction (arrow R direction).

A braking device (100), separate and remote from its guide members, having resilient strips (3; 31; 32) borne by a braking mobile component (10) trapped between a structure (1) and a bolt (6) and movable perpendicularly to the axis of a horological mobile component arbor (30), on which the strips bear, and either all of the bearing forces on the arbor (30) of the strips (3) are exerted within a single angular sector having a centre angle (a) of less than 180, or, opposite a first straight or convex strip (31) tangentially braking this arbor (30), a second strip (32) allows for relative mobility between the braking mobile component (10) and this arbor (30) in a direction of mobility (DM), the latter being: either parallel to the first resilient strip (31), or wavy and deformable perpendicularly to the direction of mobility (DM).

A braking device (100), separate and remote from its guide members, having resilient strips (3; 31; 32) borne by a braking mobile component (10) trapped between a structure (1) and a bolt (6) and movable perpendicularly to the axis of a horological mobile component arbor (30), on which the strips bear, and either all of the bearing forces on the arbor (30) of the strips (3) are exerted within a single angular sector having a centre angle (a) of less than 180, or, opposite a first straight or convex strip (31) tangentially braking this arbor (30), a second strip (32) allows for relative mobility between the braking mobile component (10) and this arbor (30) in a direction of mobility (DM), the latter being: either parallel to the first resilient strip (31), or wavy and deformable perpendicularly to the direction of mobility (DM).

A gearing (E1) for a horological mechanism (100), comprising a first toothed wheel (R1) including first symmetrical teeth (d1) and a second toothed wheel (R2) including second symmetrical teeth (d2), each of the first and second teeth being conformed so that the primitive backlash (J) of the gearing is less than 0.3 .m, or even less than 0.25 .m, or even less than 0.2 .m, or even less than 0.15 .m, or even less than 0.1 .m, or even less than 0.08 .m for the nominal axial center distance (e) of the gearing, where m is the modulus of the wheel of which the tooth forms part.

A gearing (E1) for a horological mechanism (100), comprising a first toothed wheel (R1) including first symmetrical teeth (d1) and a second toothed wheel (R2) including second symmetrical teeth (d2), each of the first and second teeth being conformed so that the primitive backlash (J) of the gearing is less than 0.3 .m, or even less than 0.25 .m, or even less than 0.2 .m, or even less than 0.15 .m, or even less than 0.1 .m, or even less than 0.08 .m for the nominal axial center distance (e) of the gearing, where m is the modulus of the wheel of which the tooth forms part.

Provided is a timepiece that improves the ease of unwinding a spring. The timepiece has a bridge disposed between the rotor and the main plate when seen in a side view; a pawl lever that is disposed between the rotor and bridge in side view, moves bidirectionally in a direction toward and a direction away from the transmission wheel in conjunction with the rotor, and causes the transmission wheel to turn in one direction; a release mechanism that is disposed to the bridge, and can change between an engaged state in which the pawl lever and the transmission wheel are engaged, and a released state in which the pawl lever and the transmission wheel are not engaged; and a train bridge disposed in side view between the pawl lever and the rotor, and having a first hole disposed to a position superimposed with the release mechanism when seen in a plan view.

Timepiece display mobile component (1) comprising at least one resilient strip (4) returned to a display axis (DA), to cooperate in a friction drive with an arbor (2) of a drive mobile component (3) of a movement (100) or a mechanism, about the axis (DA), this mobile component (1) includes a flange (5) comprising, facing each resilient strip (4), an aperture (6) for the insertion and guidance of a manual or robotic tool to allow the tool to move the resilient strip (4) away from its rest position, and to insert the mobile component (1) on an arbor (2) when the resilient strip (4) is sufficiently far away to allow this mobile component to pass, and to ensure a constant friction value of all the resilient strips (4) on the arbor (2) when they are in frictional cooperation with the arbor (2) and when the tool is no longer in contact with the resilient strips (4).

A system for adjusting the angular position of a first toothed wheel set relative to a support on which the first toothed wheel set is mounted such that it can pivot. The adjusting system includes an adjusting member allowing an action to be applied to an angular position of the first toothed wheel set so as to adjust the angular position of the first toothed wheel set relative to the support. A timepiece can include such an adjusting system.

A retrograde display mechanism including a main plate and a rack pivoting on a first arbor about a first axis centring its toothing, and including a sensing element following a cam pivoting on a second arbor about a second axis, the position of the first pivot axis and/or of the second pivot axis is adjustable with respect to the main plate with an adjustment plate carrying the first arbor and/or respectively the second arbor, and movable with at least one degree of freedom with respect to the main plate whose position with respect to the main plate is adjustable by an adjustment control device or an eccentric screw secured to the main plate and cooperating with a notch in the adjustment plate, or vice versa.

A motor group including motor modules, each including a motor device driving a display wheel set, with a center pipe fixed on a plate, including a device for rotational guiding, about a main axis, of a display wheel set internal or external to the center pipe, this module includes an axial stop arranged to limit to a predetermined value the axial play in the direction of the main axis between the center pipe and the display wheel set, wherein a protruding surface of the center pipe or of the display wheel set, or an added axial stop, captively mounted between the center pipe and the display wheel set, or fixed to the display wheel set.