阅读说明：本技术 用于半瞬时跳动机构的时计轮副 (Timepiece wheel set for a semi-instantaneous jump mechanism ) 是由 J·萨格里尼 于 2020-11-27 设计创作，主要内容包括：用于半瞬时跳动机构(100)的时计轮副(10),包括止动构件(7)、弹性复位装置(3)和驱动轮(1),驱动轮包括围绕轴线(D)的毂(2),毂用于相对于驱动轮(1)引导可动止动构件(7)并且包括可脱离接合的止动指状物针(8),止动指状物针可在其相对于轴线(D)的径向延伸最大的卷绕位置和其相对于轴线(D)的径向延伸最小的展开位置之间移动,止动指状物针(8)通过弹性复位装置(3)而移动离开轴线(D),并且止动构件(7)包括壳体(71),壳体的壁布置成在弹性复位装置(3)的卷绕期间与弹性复位装置(3)所包括的接触表面(51)支承地配合,以限制卷绕的值并且将弹性复位装置(3)的变形限制到仅其弹性范围。(Timepiece wheel set (10) for a semi-instantaneous jump mechanism (100) comprising a stop member (7), an elastic return device (3) and a drive wheel (1), the drive wheel comprising a hub (2) about an axis (D) for guiding the movable stop member (7) with respect to the drive wheel (1) and comprising a disengageable stop finger needle (8) movable between a winding position in which its radial extension with respect to the axis (D) is maximum and a deployed position in which its radial extension with respect to the axis (D) is minimum, the stop finger needle (8) being moved away from the axis (D) by the elastic return device (3), and the stop member (7) comprising a housing (71) whose walls are arranged to cooperate bearingly with a contact surface (51) comprised by the elastic return device (3) during winding of the elastic return device (3), to limit the value of the winding and to limit the deformation of the elastic return means (3) to only its elastic range.)

1. Timepiece wheel set (10) for a semi-instantaneous jump mechanism (100), the wheel set (10) comprising a stop member (7), an elastic return device (3) and a drive wheel (1) comprising a hub (2) about a pivot axis (D) for guiding the stop member (7), the stop member (7) being movable with respect to the drive wheel (1) and the drive wheel comprising at least one disengageable stop finger (8) movable between a winding position, in which the radial extension of the stop finger (8) is maximum with respect to the axis (D), and a deployed position, in which the radial extension of the stop finger (8) is minimum with respect to the axis (D), the stop finger (8) being acted upon by the elastic return device (3), said elastic return means tending to move the stop finger away from said axis (D), characterized in that said stop member (7) comprises a first housing (71) whose wall is arranged to cooperate bearing-wise with a contact surface (51) comprised by said elastic return means (3) during winding of said elastic return means (3) to limit the value of said winding and to limit the deformation of said elastic return means (3) to only its elastic range.

2. Wheel set (10) according to claim 1, characterized in that the hub (2) is integral with the drive wheel (1).

3. Wheel set (10) according to claim 1 or 2, characterized in that the elastic return means (3) are springs, the inner ends (4) of which are integral with the hub (2) and/or with the drive wheel (1).

4. Wheel set (10) according to any one of claims 1 to 3, characterized in that the elastic return means (3) are springs, the outer ends (6) of which are housed in a second housing (76) comprised by the stop member (7).

5. Wheel set (10) according to claim 4, characterized in that the outer end (6) is loosely movable in the second housing (76).

6. Wheel set (10) according to any one of claims 2 to 5, characterized in that the spring comprises a coil (51) arranged in contact with the first housing (71) of the stop member (7) according to a large contact area (ZC) with an angular amplitude greater than 10 ° with respect to the axis (D) in the wound position and at a distance from the first housing (71) in the deployed position.

7. Wheel set (10) according to any one of claims 1 to 6, characterized in that the stop member (7) comprises an elongated opening (9) in which the hub (2) is housed and which allows the radial movement properties of the stop member (7) with respect to the hub (2) in order to vary the radial position of the peripheral stop fingers (8) which the stop member (7) comprises.

8. A semi-instantaneous jump timepiece display mechanism (100) comprising a wheel set (10) according to any one of claims 1 to 7, drive means for driving the driving wheel (1), a display wheel set (110) comprising teeth (108) arranged to cooperate with the stop fingers (8) of the wheel set (10).

9. Semi-instantaneous jump timepiece display mechanism (100) according to claim 8, characterised in that said mechanism (100) is a date mechanism.

10. Timepiece (1000) comprising at least one semi-instantaneous jump timepiece display mechanism (100) according to claim 8 or 9.

11. The timepiece (1000) of claim 10, characterised in that it is a watch.

Technical Field

The invention relates to a timepiece wheel set for a semi-instantaneous jumping mechanism, the wheel set comprising a stop member, an elastic return means and a drive wheel, the drive wheel comprising a hub about a pivot axis for guiding the stop member, the stop member being movable relative to the drive wheel and comprising at least one disengageable stop finger movable between a winding position, in which the radial extension of the stop finger is maximum with respect to the axis, and a deployed position, in which the radial extension of the stop finger is minimum with respect to the axis, the stop finger being subjected to the action of the elastic return means, which tend to move the stop finger away from the axis.

The invention also relates to a semi-instantaneous jump timepiece display mechanism including such a wheel set.

The invention also relates to a timepiece, in particular a wristwatch, comprising at least one such semi-instantaneous timepiece display mechanism.

The present invention relates to the field of timepiece display mechanisms, in particular jump displays such as date mechanisms.

Background

Semi-instantaneous jump timepiece mechanisms generally comprise a spring with fingers, comprising one or more coils, which remain wound for a considerable time and are released during the jump, for example during the change of the day, to display the date. The deformation of such springs is difficult to control.

Document CH525508A in the name of ERARD describes a device for driving the date indicator of a timepiece, consisting only of mechanisms carried respectively by the hour wheel and by the minute wheel and pinion, the transmission ratio between the hour wheel and the minute wheel and pinion being defined so that there is a single coincidence for twenty-four hours, so that the mechanism carried by the hour wheel displaces the mechanism carried by the minute wheel and pinion, driving the date indicator mechanism. The mechanism carried by the minute wheel and pinion is first displaced so as to wind the spring integral therewith until the moment when it is released, and under the action of said spring it projects forward so as to ensure the instantaneous jump of the date indicator disk. The mechanism carried by the hour wheel is designed such that it does not function during a function in the opposite direction of the time setting.

Disclosure of Invention

The present invention proposes to improve the control of the spring deformation of a disengageable drive system for semi-instantaneous jumps.

The concept of the invention has the following objectives: allowing a more precise angular winding than the existing mechanisms and making any plastic deformation of the spring element almost impossible in order to ensure its durability.

To this end, the invention relates to a timepiece wheel set for a semi-instantaneous jump mechanism according to claim 1.

The invention also relates to a semi-instantaneous jump timepiece display mechanism including such a wheel set.

The invention also relates to a timepiece, in particular a wristwatch, comprising at least one such semi-instantaneous timepiece display mechanism.

Drawings

Other features and advantages of the present invention will become apparent upon reading the following detailed description, with reference to the accompanying drawings, in which:

figure 1 shows schematically in plan view a timepiece wheel set for a semi-instantaneous jump mechanism according to the invention, having a gear wheel, a hub and internal parts of a helical spring integral with each other, the solid outer end of the spring being housed in a case, a stop member comprising the case, the stop member comprising an elongated groove allowing the radial travel of the hub with respect to the stop member, the wheel set being shown in an intermediate position during the winding of the spring;

figure 2 shows, similarly to figure 1, the same wheel set in a wound configuration, in which the outer coils of the spring are in bearing contact, over a wide angular range, with the holes or recesses or counterbores comprised by the stop member;

figure 3 shows, similarly to figures 1 and 2, the same wheel set in a deployed configuration, in which the contact between the outer coils of the spring and the hole or recess or counter-bore is reduced to a minimum or zero;

figure 4 shows, similarly to figures 1 and 2, the same wheel set in a deployed configuration, in which the contact between the outer coil of the spring and the hole or recess or counter-bore is reduced to a minimum or zero, and in which the hub changes its relative position with respect to the stop member by sliding in the elongated groove of the stop member, this configuration occurring when another wheel set of the display mechanism pushes the fingers of the stop member radially towards the centre during an adjustment operation, such as for example the date indicator visible below in figure 7;

figure 5 shows schematically in an exploded perspective view the wheel set of figures 1 to 4;

figure 6 shows schematically in perspective view the cooperation of the stop member and the spring of the wheel set of figures 1 to 3;

figure 7 shows schematically, partially and in plan view, a timepiece display mechanism with a semi-instantaneous jump, being a date mechanism comprising a display wheel set comprising a tooth arranged to cooperate with a stop finger of the wheel set of figures 1 to 5;

fig. 8 is a block diagram showing a timepiece, in particular a wristwatch, including at least one such semi-instantaneous jump timepiece display mechanism.

Detailed Description

The invention relates to a timepiece wheel set 10 for a semi-instantaneous jump mechanism 100. The wheel set 10 comprises a stop member 7, a resilient return means 3 and a drive wheel 1 comprising a hub 2 for guiding the stop member 7 about a pivot axis D.

The stop member 7 is movable with respect to the drive wheel 1 and comprises at least one stop finger 8 which is disengageable and movable between a winding position, in which the radial extension of the stop finger 8 is maximum with respect to the axis D, and a deployed position, in which the radial extension of the stop finger 8 is minimum with respect to the axis D.

The stop finger 8 is subjected to elastic return means 3 which tend to move it away from the axis D, or which form part of the elastic return means 3, generally in the shape of a finger spring.

According to the invention, the stop member 7 comprises a first housing 71, the wall of which is arranged to cooperate bearing-wise with a contact surface 51 comprised by the elastic return means 3 during winding of the elastic return means 3, so as to limit the value of winding and to limit the deformation of the elastic return means 3 to only its elastic range. Thus, damage to the elastic return means 3 can be prevented, in particular during an adjustment operation, as will be explained below.

The invention is illustrated in the figures by the particular case of a semi-instantaneous date driving wheel.

More particularly, the hub 2 is integral with the drive wheel 1.

More particularly, the elastic return means 3 are springs, the inner ends 4 of which are integral with the hub 2 and/or with the drive wheel 1.

More particularly, the elastic return means 3 are springs, the outer ends 6 of which are housed in a second housing 76 comprised by the stop member 7. More particularly, the outer end 6 is loosely movable in the second housing 76.

More particularly, the elastic return means 3 are a spring comprising a coil 51 arranged: a large contact area ZC, greater than 10 ° according to the angular amplitude with respect to the axis D, is in contact with the first shell 71 of the stop member 7 in the winding position and is kept at a distance from the first shell 71 in the unwinding position.

Preferably, this first housing 71 is formed, in at least one angular portion, by a hole, or a recess, or a counterbore, which is able to come into contact with the coils of the spring. For example, the figures show the first housing 71 consisting of a recess of about 355 ° and which is cleared (clear) over a central angle of about 5 ° to allow the passage of the outer end of the spring 6 and its insertion into the second housing 76.

More particularly, the stop member 7 comprises an elongated opening 9 in which the hub 2 is housed and which allows the radial movement capability of the stop member 7 with respect to the hub 2, so as to vary the radial position of the peripheral stop fingers 8 comprised by the stop member 7.

The invention also relates to a semi-instantaneous jump timepiece display mechanism 100 comprising such a wheel set 10. More specifically, mechanism 100 comprises drive means for driving drive wheel 1 and at least one display wheel set 110 comprising a tooth 108 arranged to cooperate with stop finger 8 of wheel set 10, or comprising a raised profile able to cooperate with stop finger 8.

More particularly, the mechanism 100 is a date mechanism.

Fig. 7 shows this particular non-limiting case of the date mechanism. During date correction by the user, the tooth 108 of the date indicator 110, rotated in the clockwise direction of the arrow in the figure, will push the finger 8, controlling disengagement of the hub 2 and relative position change with respect to the elongated opening 9 during radial withdrawal of the finger 8 under the action of the push exerted by the tooth 108, as can be seen in fig. 4; after the passage of the tooth 108, the spring 3 returns the finger 8 to the position shown in fig. 7; the finger 8 will drive the tooth 108 during the next date change.

The invention also relates to a timepiece 1000 comprising at least one such semi-instantaneous timepiece display mechanism 100, in particular with a control device 500. More particularly, the timepiece 1000 is a wristwatch.

In summary, the invention allows to secure a fragile mechanism, since the risk of breaking the spring element is reduced due to the abutment over a large bearing area of the spring, while providing a significant gain in space requirements compared to prior mechanisms. The resilient properties of the retaining spring are ensured. The invention ensures better force control. The mechanism according to the invention stores energy in a controlled manner, with precise angular winding.