A prograde display mechanism for a timepiece

Abstract

The invention relates to a forward display mechanism comprising: a first wheel driven by a timepiece movement; a second wheel coaxial with the first wheel and linked to it by a resilient member; a first intermediate wheel directly driven by the first wheel, which directly drives a third wheel carrying a display member; the third wheel comprising at least two smooth angular sectors whose teeth are truncated; a fourth wheel coaxial with the third wheel and rigidly connected in rotation to it, which engages with the second wheel via a second intermediate wheel; the mechanism being configured so that when the display member is driven angularly by successive short jumps of first angle between two indicator marks separated by a first angle, the rotation speed of the second wheel is less than that of the first wheel, so as to progressively wind the resilient member during this period, and so that the resilient member is unloaded when the teeth of the intermediate wheel encounter the smooth angular sectors of the third wheel, resulting in an instantaneous passage through the smooth angular sectors and in an angular movement achieved by a long jump of second angle by the display member.

Description

Technical Field

[0001] The present invention relates to a forward / forward or "anti-reverse" display mechanism, that is, a display mechanism configured to pivot the display member in the running direction at a first angular distance greater than a second angular distance.

[0002] The present invention also relates to a watch movement including such a clockwork display mechanism, and a watch including such a watch movement. Background Technology

[0003] Forward-oriented display mechanisms are typically used to display information related to the current hour or calendar information.

[0004] In traditional watches, the markers used to indicate the current hour or calendar are usually evenly distributed around the circumference of the dial. However, in some cases, it is desirable that the display components do not remain in a stable position on a specific sector of the dial to prevent them from being hidden at a certain time, for example, from another display (e.g., moon phase) or a complication (e.g., tourbillon) located in that specific sector of the dial in question.

[0005] To prevent the display element from remaining positioned in a predetermined dial sector, it is known to use a forward display mechanism that allows the display element to jump forward a greater angular distance in a predetermined corner sector than for other scales, so that the display element does not stop in that corner sector.

[0006] Patent CH 699736 describes one embodiment of such a forward-flowing display mechanism for a calendar, wherein the calendar markers are not evenly distributed on the circumference, but are arranged such that the angular distance separating markers 15 and 16 is greater than the angular distance separating the other markers 1 to 31. Therefore, between markers 15 and 16, a corner sector of the watch dial without markers is formed, in which the calendar hand does not stop, but jumps at a second angle greater than the first angle separating the other markers. The forward-flowing display mechanism described in this patent is based on the use of multiple toothed sectors and their complex arrangement.

[0007] Patent document CH 713209 describes another embodiment of a forward-flowing display mechanism also applied to a calendar. In this document, the angular distance separating indicator marks 31 and 1 is greater than the angular distance separating other indicator marks between 1 and 31. To enable the calendar hand to tilt from indicator mark 31 to indicator mark 1 without stopping, this document proposes the use of a worm cam rigidly connected to a calendar wheel carrying the calendar hand, which is advanced one step each day by a calendar actuator. The worm cam cooperates with a lever and a spring to ensure a stable angular position of the cam between indicator marks 1 and 31. The worm cam includes a toothed portion comprising 30 teeth for 30 stable positions between indicator marks 1 and 31, and a smooth portion extending in an angular sector corresponding to the unmarked angular sector of the dial (between indicator marks 31 and 1), such that the cam and calendar wheel can be pivoted at an angle corresponding to the angle between indicator marks 31 and 1 under the action of the lever.

[0008] However, either the manufacture of these mechanisms and their integration into the watch case are complex, or these mechanisms are very sensitive to variations in manufacturing (especially machining), resulting in a lag in the scale jumps, which makes these mechanisms difficult to industrialize.

[0009] Therefore, there is a need to improve sequential display mechanisms, especially to make them easier to industrialize and thus less sensitive to changes in part dimensions, more compact, easier to use, and more reliable. Summary of the Invention

[0010] Against this backdrop, the present invention proposes a forward-moving display mechanism for a clock, comprising a display with a scale including a plurality of indicator marks distributed on the circumference of the display, the scale being configured such that an angular distance separating two consecutive indicator marks corresponds to a second angle β, the second angle β being greater than a first angle α separating two of other consecutive indicator marks, the forward-moving display mechanism being configured to drive an angular movement of a display member by a series of short jumps with the first angle α between two indicator marks separated by the first angle α and long jumps with the second angle β between two scale indicator marks separated by the second angle β, the forward-moving display mechanism being characterized by comprising:

[0011] - The first wheel, known as the drive wheel, is capable of being driven by the watch movement;

[0012] - A second wheel that is coaxial with the first wheel and connected to the first wheel through an elastic member;

[0013] - A first intermediate wheel directly driven by a first wheel, the first intermediate wheel directly driving a third wheel, referred to as a display wheel, which cooperates with the display component; the third wheel includes a smooth-angled sector in which at least two teeth are truncated;

[0014] - A fourth wheel that is coaxial with the third wheel and rigidly connected to the third wheel in terms of rotation, the fourth wheel meshing with the second wheel via a second intermediate wheel;

[0015] The sequential display mechanism is configured such that when the display member is driven to perform angular movement by a series of short jumps with a first angle α between two indicator marks separated by a first angle α, the rotational speed of the second wheel is less than that of the first wheel, so as to progressively wind the elastic member during these short jumps, and the sequential display mechanism is configured such that when the teeth of the intermediate wheel encounter the smooth angular sector of the third wheel, the elastic member is released, resulting in an instantaneous passage through the smooth angular sector and resulting in an angular movement achieved by a long jump with a second angle β through the display member.

[0016] In addition to the features mentioned above, the sequential display mechanism according to the present invention may have one or more supplementary features of the following features, which may be considered individually or in any technically feasible combination:

[0017] - The first round can be driven by the watch movement in a jumping manner;

[0018] - The first round includes the number of teeth n1, which is equal to the number of scale markings on the display;

[0019] - The second round includes a number of teeth n2 that is greater than the number of teeth n1 in the first round;

[0020] - The third round includes the effective number of teeth n distributed on the tooth section. 3 eff and the number of cutting teeth n located on the smooth angular sector 3 tronq The effective number of teeth and the cut-off number of teeth are collectively formed on the entire circumference of the third gear, corresponding to the number of teeth n. 3 equi The equivalent number of teeth n on the entire circumference of the third round 3 equi It equals the number of teeth in the second gear, n2;

[0021] - The number of teeth n on the smooth angle sector of the third round 3 tronq It is an integer corresponding to the ratio of the second angle β to the first angle α;

[0022] - The fourth round includes the same number of teeth n4 as the second round n2;

[0023] - The number of teeth n2 in the second round is determined by the following formula:

[0024]

[0025] in:

[0026] α is the first angle, corresponding to the first angular distance that separates at least two consecutive scale markings;

[0027] β i It is a second angle greater than the first angle α, corresponding to a second angular distance different from the first angle, and this second angular distance will be the scale sector S. i At least two other consecutive scale markings are separated at that point;

[0028] i is an integer between 1 and j;

[0029] j is the sector S of the scale. i The integer corresponding to the total number in sector S i In the middle, two consecutive scale indicators are at a second angle β greater than the first angle α. i Separate;

[0030] -The elastic component is a belt spring, leaf spring, plate spring, or helical spring;

[0031] - The elastic member is integral with the first wheel, thereby the elastic member includes a first end integral with the first wheel and a second end connected to the second wheel, or the elastic member is integral with the second wheel, thereby the elastic member includes a first end integral with the second wheel and a second end connected to the first wheel;

[0032] - The display includes a calendar scale with 31 indicator marks, and the display element is a calendar pointer;

[0033] - The calendar scale includes numbers 1 to 31 and / or corresponding markers, with consecutive numbers from 1 to 31 separated by a first angle α, and the numbers 31 and 1 separated by a second angle β greater than the first angle α;

[0034] - The first wheel includes 31 teeth and is configured to rotate once every 31 days, and the forward display mechanism is configured to progressively extend the elastic member for 31 days;

[0035] - The display includes a minute scale with 60 indicator marks and the display element is a minute hand, or the display includes a second scale with 60 indicator marks and the display element is a second hand.

[0036] The present invention also relates to a watch movement, characterized in that the watch movement includes a forward display mechanism according to the present invention.

[0037] The present invention also relates to a clock, the clock including a clock movement, the clock movement including a forward display mechanism according to the present invention.

[0038] Preferably, the clock is a wristwatch. Attached Figure Description

[0039] The object, advantages, and features of the present invention will be better understood after reading the detailed description given below with reference to the accompanying drawings:

[0040] - Figure 1 A schematic perspective view of a first embodiment of the sequential display mechanism according to the present invention is shown;

[0041] - Figure 2 yes Figure 1 A schematic bottom view of the sequential display mechanism shown;

[0042] - Figures 3 to 6 Schematic illustration Figure 1 The different positions of the sequential display mechanism are shown;

[0043] - Figure 7a and 7b A second embodiment of the sequential display mechanism according to the present invention is illustrated schematically. More specifically, Figure 7a For a second embodiment of displaying the dial, Figure 7b This is a second embodiment of the corresponding display wheel;

[0044] - Figure 8a and 8b A third embodiment of the sequential display mechanism according to the present invention is illustrated schematically; more specifically, Figure 8a For the third embodiment of displaying the dial, Figure 8b This is the third embodiment of the corresponding display wheel;

[0045] - Figure 9a and 9b A fourth embodiment of the sequential display mechanism according to the present invention is illustrated schematically; more specifically, Figure 9a For the fourth embodiment of displaying the dial, Figure 9b This is the fourth embodiment of the corresponding display wheel.

[0046] In all figures, unless otherwise stated, common elements have the same reference numerals. Detailed Implementation

[0047] The sequential display mechanism 100 according to the invention is intended to be housed in a clock, such as a wristwatch.

[0048] The sequential display mechanism 100 according to the invention is configured to be actuated by a watch movement (not shown), that is, by a mechanism therein that operates depending on the time division.

[0049] The sequential display mechanism 100 is configured to generate a jump display of a display element (or indicator), such as a pointer, facing a display, such as a dial, which has an outer circumferential scale formed by a plurality of indicator marks distributed on the circumference of the display. Two consecutive indicator marks separated by an angular distance correspond to a second angle β, which is greater than a first angle α separating two other consecutive indicator marks of the scale. The scale includes at least two consecutive indicator marks separated by a second angle β greater than the first angle α.

[0050] In an alternative embodiment (not shown), the sequential display mechanism 100 is configured to generate a display by jumping a display member, such as a disc, having a plurality of indicator marks distributed on the circumference of the disc forming an outer circumferential scale, the display member engaging with an opening provided in the dial, the opening forming a window exposing a portion of the display member.

[0051] The sequential display mechanism 100 is configured to drive the display member by a series of short jumps between scale indicators separated by a first angle α and a long jump between two consecutive scale indicators separated by a second angle β.

[0052] exist Figures 1 to 6 In the first embodiment of the sequential display mechanism 100 specifically shown, the sequential display mechanism 100 is applied to a particular example of a calendar display. However, the sequential display mechanism according to the invention is also applicable to the display of all time-based information. Therefore, the sequential display mechanism according to the invention can also be a sequential display mechanism for calendars, hours, minutes, seconds, or chronographs, moon phases, counters, power reserves, etc.

[0053] exist Figures 1 to 6 In the first example shown, the sequential display mechanism 100 includes a dial 3 (in Figures 3 to 6 As shown in the figure, dial 3 has multiple indicator marks that form the calendar scale. Therefore, dial 3 includes 31 indicator marks distributed on the circumference of dial 3.

[0054] In the example shown, the calendar scale includes odd numbers 1 to 31 distributed on the circumference of dial 3, and markers between two odd numbers. Here, the markers between the odd numbers represent even numbers. They replace the numbers on the scale, specifically to improve the readability of the display. Therefore, in this application, for clarity, only the numbers will be referred to, and even numbers are markers.

[0055] The angular distance separating the consecutive numbers 31 and 1 corresponds to a second angle β, which is greater than the first angle α that separates the other numbers between 1 and 31 on the calendar scale.

[0056] Figure 1A schematic perspective view of a sequential display mechanism 100 according to the invention is shown, which is used to drive the display member to angular movement by a series of short jumps between indicator marks separated by angle α and a long jump between scale indicator marks separated by angle β.

[0057] Figure 2 Schematic illustration Figure 1 The bottom view of the sequential display mechanism 100 shown.

[0058] refer to Figure 1 and 2 The sequential display mechanism 100 according to the invention includes a first wheel 110, called a drive wheel, which is directly driven to rotate by a watch movement (not shown).

[0059] In the illustrated embodiment, the drive wheel 110 rotates once every 31 days, and is moved once a day by the watch movement. Therefore, the drive wheel 110 is pushed forward one step each day.

[0060] For this purpose, the drive wheel 110 includes a number of teeth n1, which is equal to the number of teeth for the 31 graduated positions of the drive wheel 110, corresponding to the 31 graduated positions of the calendar display device with respect to the 31 indicator marks of the calendar scale on the dial 3.

[0061] Each indexed position of the drive wheel 110 is indexed and positioned by a lever 180 that mates with the drive wheel 110. The lever 180 is rotatable about a pivot 181 and is constrained by an elastic element (not shown) that tends to return the lever beak 182 toward the axis of rotation of the drive wheel 110, such that the lever beak 182 mates with the teeth and inter-tooth space of the drive wheel 110 to ensure that the drive wheel 110 is held in place between each step.

[0062] The forward display mechanism 100 also includes a second wheel 120 coaxially mounted with the drive wheel 110. The second wheel 120 has a different number of teeth n2 than the number of teeth n1 of the drive wheel 110. Advantageously, the second wheel 120 has a number of teeth n2 greater than the number of teeth n1 of the drive wheel 110.

[0063] The drive wheel 110 and the second wheel 120 are not rigidly connected in terms of rotation. The two wheels 110 and 120 are connected to each other by an elastic member 160. The elastic member 160 includes a first end 161 rigidly connected to the drive wheel 110 and a second end 162 rigidly connected to the second wheel 120.

[0064] A "rigid connection" means a mechanical connection in which at least one degree of freedom is locked.

[0065] The forward display mechanism 100 also includes a third wheel 130, called the display wheel, which drives the display components for displaying the calendar on the dial 3.

[0066] For example, such as Figures 3 to 6 As shown, the display component can be formed by a calendar pointer 2 mounted on a sleeve 132 of the display wheel 130.

[0067] According to an alternative embodiment (not shown), the display component is a disc rigidly connected to the display wheel 130 in terms of rotation, the disc having a plurality of indicator marks forming a calendar scale and configured to engage with an opening in the dial to expose a portion of the disc.

[0068] The drive wheel 110 directly drives the intermediate wheel 150, which in turn directly drives the display wheel 130. The intermediate wheel 150 advantageously enables the establishment of a setting wheel / pin wheel between the drive wheel 110 and the display wheel 130.

[0069] Display wheel 130 includes at least one tooth and at least one corner sector 131, in which multiple teeth are truncated to form a toothless "smooth" corner sector. Therefore, temporarily, for each complete rotation of display wheel 130, when the smooth corner sector 131 of display wheel 130 is about to face the tooth of intermediate wheel 150, display wheel 130 does not directly engage with drive wheel 110.

[0070] exist Figures 1 to 6 In the specific case shown, the smooth angle sector 131 is bounded by the first tooth d1 and the last tooth d30 of the tooth, showing that the wheel 130 includes 30 teeth.

[0071] exist Figures 1 to 6 In the example shown, the display wheel 130 includes a single smoothed corner sector 131 that defines an area in which at least two teeth are truncated.

[0072] Therefore, the display wheel 130 includes an effective number of teeth n distributed on the tooth section. 3 eff and the number of cutting teeth n on the smooth angle sector 131 3 tronq Therefore, the quantity n is obtained. 3 equi This corresponds to the equivalent number of teeth on the circumference of the wheel.

[0073] For display wheel 130, the following relationship is derived:

[0074] n 3 equi =n 3 eff +n 3 tronq

[0075] It should be noted that the display wheel 130 may, as needed, include multiple teeth and multiple smooth angular sectors 131 evenly or unevenly distributed on the circumference of the display wheel 130, with angular distances that may be large or small, and may be equal or unequal. Reference will be made below. Figures 7a to 9b Further embodiments are described.

[0076] The forward display mechanism 100 also includes a fourth wheel 140, which is coaxial with the display wheel 130 and rigidly connected to the display wheel 130 in terms of rotation. The fourth wheel has a number of teeth n4.

[0077] The fourth wheel 140 directly meshes with the second intermediate wheel 170, and the second intermediate wheel 170 directly meshes with the second wheel 120, so that the second wheel 120 is driven to rotate by the second intermediate wheel 170.

[0078] Advantageously, the second wheel 120 has a number of teeth n2 greater than the number of teeth n1 of the drive wheel 110, and thus has a rotational speed less than the rotational speed of the drive wheel 110, so that the elastic member 160 is progressively loaded or charged during the rotation of the drive wheel 110.

[0079] Advantageously, the second wheel 120 and the display wheel 130 have a number of teeth n2 and n3 respectively greater than the number of teeth n1 of the drive wheel 110. 3 equi Advantageously, the second wheel 120 and the display wheel 130 have the same number of teeth (n2 = n). 3 equi ).

[0080] Advantageously, the second wheel 120, the display wheel 130, and the fourth wheel 140 each have a number of teeth n2 and n3 that are greater than the number of teeth n1 of the drive wheel 110. 3 equi n2 = n4. Advantageously, the second wheel 120, the display wheel 130, and the fourth wheel 140 have the same number of teeth (n2 = n4). 3 equi =n4).

[0081] exist Figures 3 to 6 In the illustrated embodiment, the dial 3 includes a calendar scale. The calendar scale comprises 31 indicator marks that are non-uniformly distributed around the circumference of the dial 3 because the second angle β between the numerals 31 and 1 is greater than the first angle α that separates the other numerals between 1 and 31.

[0082] In this example, angle β is twice the angle α.

[0083] Therefore, dial 3 is divided into 32 equidistant sections, with two consecutive sections separated by a first angle α.

[0084] These partitions form a divisible location P. x , where x ranges from 1 to 32.

[0085] The 31 digits that form the calendar markers are distributed across 31 divisible positions on dial 3, namely positions P1 to P2. 31 .

[0086] Scaleable position P 32(Virtual, hence indicated by dashed lines) There are no indicator marks, and it is intended to be skipped directly by the calendar pointer 2, thus reaching number 31 (divisible position P). 31 A long jump with angle β is achieved between the number 1 and the number 1 (divisible position P1).

[0087] The drive wheel 110 has 31 teeth, corresponding to the 31 graduation positions of the calendar hand 2, and thus to the 31 indicator marks of the calendar scale on the dial 3.

[0088] Advantageously, the second round 120 includes the number of teeth n2 defined by the following relationship:

[0089]

[0090] in:

[0091] α is a first angle corresponding to a first angular distance that separates at least two consecutive scale markings;

[0092] β i It is the sector S of the scale i The second angle between at least two other consecutive scale markings is greater than the first angle α and corresponds to a second angular distance different from the first angular distance;

[0093] i is an integer between 1 and j;

[0094] j is the sector S of the scale. i The integer corresponding to the total number in sector S i In the middle, two consecutive scale indicators are at a second angle β greater than the first angle α. i Separately spaced.

[0095] As can be seen from the above, the second angle β is twice the first angle α.

[0096] n1 = 31

[0097] β / α = 2

[0098] n² = 3² = n 3 equi =n4

[0099] The number of cutting teeth n at the smooth corner sector 131 of the display wheel 130 3 tronq It is equal to the ratio between the second angle β and the first angle α.

[0100]

[0101] Therefore, in Figures 1 to 6In the illustrated embodiment, the display wheel 130 is equivalent to a wheel with 32 teeth, where two consecutive teeth are truncated at the smooth angle sector 131. The display wheel 130 therefore has 30 effective teeth. 3 eff .

[0102] For a complete rotation of drive wheel 110, second wheel 120 will have an angular loss of 1 / 32° relative to drive wheel 110, which rotates once every 31 days. The difference in relative rotational speed between drive wheel 110 and second wheel 120 will progressively load or tension elastic member 160 through elastic deformation over a given period (31 days in this case).

[0103] The elastic element 160 can be a belt spring, leaf spring, leaf spring, coil spring, or any other elastic element commonly used in the watchmaking industry.

[0104] exist Figures 1 to 6 In the illustrated embodiment, the elastic member 160 is integral with the drive wheel 110. Therefore, the first end 161 is integral with the drive wheel 110, and the second end 162 is connected to the second wheel 120.

[0105] For example, the second end 162 forms a hook head including a pin 163, which engages with an elongated ring 121 arranged on the second wheel 120 to rigidly connect the second end 162 of the elastic member 160 to the second wheel 120 in terms of rotation.

[0106] According to an embodiment not shown, the elastic member is integral with the second wheel 120, such that the second end 162 is integral with the second wheel 120 and the first end 161 is connected to the drive wheel 110.

[0107] Operation of the forward display mechanism

[0108] The following will refer to Figures 3 to 6 Describe the operation of the sequential display mechanism 100. Figures 3 to 6 References are shown Figures 1 to 2 The operation of the described embodiment.

[0109] Figure 3 The clockwise display mechanism 100 is shown when the calendar hand 2 is positioned on the number 1 of the calendar scale on the dial 3, corresponding to the divisible position P1.

[0110] Starting from the initial position of the forward display mechanism 100, the display wheel 130 is driven by the drive wheel 110 for 31 days in each step of the drive wheel 110. During these 31 days, the calendar hand 2 moves angularly once a day through consecutive short jumps with an angle α. Therefore, the calendar hand 2 is positioned daily at different calendar scale markers or divisible positions P on the dial 3, which are separated by an angle α, corresponding to different sections. xThe dial is divided into sections (between the numbers 1 and 31) until it reaches the date marker 31 on the dial (position P). 31 ),like Figure 4 As shown.

[0111] During these 31 days, the transmission ratio between the drive wheel 110 and the other wheels 120, 130, and 140 of the mechanism causes an angular lag between the drive wheel 110 and the second wheel 120. This lag, which increases with each increase of the drive wheel 110, will progressively load the elastic member 160.

[0112] When the calendar hand 2 is positioned at position P on the dial 3. 31 When the number 31 on the calendar scale is reached, the relative angle difference between the drive wheel 110 and the second wheel 120 is at its maximum, and the elastic member 160 is in its maximum extended position.

[0113] On the contrary, such as Figure 3 As shown, when the calendar pointer 2 is positioned at the scaled position P1 (the number 1 of the calendar scale) on the dial 3, the relative angle difference between the drive wheel 110 and the second wheel 120 is minimal, and the elastic element 160 is in its unloaded position.

[0114] The display component is indexed and positioned as follows: Figure 4 The indexable position P shown 31 Then, the next step of the drive wheel 110 will drive the display wheel 130 to rotate additionally until it reaches the position where the smooth corner sector 131 faces the intermediate wheel 150, so that the display wheel 130 is no longer engaged with the drive wheel 110, as shown. Figure 5 As shown, since the display wheel 130 is temporarily no longer engaged with the drive wheel 110, the elastic member 160 can freely release the energy accumulated over the past 31 days.

[0115] Under the unloading action of the elastic member 160, the second wheel 120 tends to compensate for the angular loss relative to the drive wheel 110 accumulated over the past 31 days, and drives the display wheel 130 to rotate (in the same direction as the drive wheel 110) to advance the calendar hand 2 forward (clockwise) until it passes through the smooth angle sector 131, and until the intermediate wheel 150 contacts the tooth d1 that intersects with the smooth angle sector 131, as shown. Figure 6 As shown.

[0116] At this moment, the elastic component is instantly unloaded, while the drive wheel 110 has not yet completed its rotation corresponding to the daily angular step. Figure 6 This stage is shown in particular. In this diagram, it should be noted that the calendar hand 2 is not yet facing the indicator mark 1 on the dial 3.

[0117] In fact, at this stage, since the lever 180 has not yet been positioned between the two teeth of the drive wheel 110, the stepping of the drive wheel 110 is not yet complete. As the restoring force of the elastic element acts on the lever 180, the lever 180 tends to cause the drive wheel 110 to complete its rotation to the next indexing position. The additional rotation of the drive wheel 110 under the action of the lever 180 will cause the first intermediate wheel 150 and therefore the display wheel 130 to lose step, thus completing the jump of the calendar hand 2 and positioning the calendar hand 2 facing the number 1 on the calendar scale of the dial 3, as described above. Figure 3 As shown.

[0118] Therefore, the long jump of the calendar pointer 2 between the numbers 31 and 1 on the calendar scale with an angle β corresponds to the rotation with an angle α normally generated by the daily stepping of the drive wheel 110 and the additional rotation with an angle ε = β - α generated by the unloading of the elastic member 160, so as to directly reach the number 1 on the calendar scale.

[0119] Clearly, the rotation of the display wheel 130 due to the unloading of the elastic member 160, and therefore the rotation of the calendar hand 2, depends on the energy accumulated during the previous indexing and the angular distance of the smooth angular sector 131 of the display wheel 130. Therefore, different configurations are possible, and a long jump with angle β can be greater than twice the angle α.

[0120] Alternative embodiments

[0121] Figure 7a and 7b A second embodiment of a sequential display mechanism according to the invention for displaying a calendar is shown. Figure 7a A second embodiment of dial 3 with calendar markings is shown. Figure 7b A second embodiment of the corresponding display wheel is shown.

[0122] In this second embodiment, the dial 3 is divided into 35 equidistant sections, wherein two consecutive sections are separated by a first angle α.

[0123] These partitions form a divisible location Px, where x ranges from 1 to 35.

[0124] The 31 digits that form the calendar markers are distributed at 31 divisible positions P on dial 3. x That is, positions P1 to P 15 and position P 16 To P 35 .

[0125] In this embodiment, the dial 3 has four consecutive partitions or divisible positions (here, position P). 16 To P 19These partitions are virtual and do not have calendar pointer markers. Therefore, these partitions are not intended to be located by the calendar pointer at 2-degree intervals.

[0126] In fact, between the numbers 15 and 16, the calendar pointer 2 executes a movement from number 15 (divisible position P). 15 ) to number 16 (divisible position P) 20 The long jump has an angle β, which is 5 times the angle α between the other numbers on the calendar scale.

[0127] The drive wheel 110 has 31 teeth, which correspond to the 31 graduation positions of the calendar hand 2, and thus to the 31 indicator marks of the calendar scale on the dial 3.

[0128] The second round of 120 includes the number of teeth n2, defined by the following relationship:

[0129] Where j = i = 1

[0130] n² = 31 + (5 - 1) = 35

[0131] Therefore, in this second embodiment, the second wheel 120 and the fourth wheel have 35 teeth, and the display wheel 130 is equivalent to a 35-tooth wheel.

[0132] The number of cutting teeth n at the smooth corner sector 131 of the display wheel 130 3 tronq Equals 5:

[0133]

[0134] Therefore, in this second embodiment, the display wheel 130 is equivalent to a 35-tooth wheel, with five consecutive teeth truncated at the smooth corner sector 131. The display wheel 130 thus has 30 effective teeth.

[0135] Figure 8a and 8b A third embodiment of the sequential display mechanism according to the invention for displaying minutes is shown. Figure 8a A third embodiment with a dial 3 featuring minute markings is shown. Figure 8b A third embodiment of the corresponding display wheel is shown.

[0136] In this third embodiment, the dial 3 is divided into 66 equidistant sections, wherein two consecutive sections are separated by a first angle α.

[0137] These partitions form a divisible location P. x , where x ranges from 1 to 66.

[0138] In this third embodiment, the 60 minute markers are distributed at 60 divisible positions P on the dial 3.x Above, that is, positions P1 to P 30 and position P 34 To P 63 .

[0139] Dial 3 consists of two sectors, S1 and S2, which contain three consecutive partitions, here located at position P. 31 To P 33 and P 64 To P 66 These are virtual and do not have minute indicator markers. Therefore, these divisions are not intended to be positioned by minute hand graduations.

[0140] Therefore, in the first sector S1, between the numbers 30 and 31, the minute hand performs the first long jump with an angle β1, which is four times the angle α corresponding to the short jump between the minute scale numbers.

[0141] At the second sector S2, between the numbers 60 and 1, the minute hand performs a second long jump with an angle β2, which is four times the angle α corresponding to the short jump between the minute scale digits.

[0142] In this embodiment, the drive wheel includes 60 indentations for 60 minutes indexed by the minute display component.

[0143] The second round of 120 includes the number of teeth n2, defined by the following relationship:

[0144] Where j = 2

[0145] n2=n1+((β1 / α)-1)+((β2 / α)-1)

[0146] n² = 60 + (4-1) + (4-1) = 66

[0147] Therefore, in this third embodiment, the second wheel 120 and the fourth wheel have 66 teeth, and the wheel 130 is shown to be a wheel with 66 teeth.

[0148] Figure 8b The display wheel 130 shown here includes two smooth corner sectors 131a and 131b opposite to each other, so as to enable... Figure 8a The minute markers of the dial 3 shown are used for indexing the display components, as well as for short jumps with angle α and two long jumps with angles β1 and β2.

[0149] The number of cutting teeth n at the first smooth angle sector 131a of the display wheel 130 3 tronq Equals 4:

[0150]

[0151] The number of cutting teeth n′ at the second smooth angle sector 131b of the display wheel 130 3 tronq Equals 4:

[0152]

[0153] Therefore, in this third embodiment, the display wheel 130 is equivalent to a wheel with 66 teeth, on which four consecutive teeth are truncated at the first smoothing sector 131a and four consecutive teeth are truncated at the second smoothing sector 131b.

[0154] The display wheel 130 thus has 58 effective teeth, either 29 consecutive teeth between each smooth corner sector 131a, 131b, or 29 consecutive teeth on the first tooth section and 29 consecutive teeth on the second tooth section.

[0155] Figure 9a and 9b A fourth embodiment of the sequential display mechanism according to the invention, particularly for displaying minutes, is shown. Figure 9a A fourth embodiment with a dial 3 featuring minute markings is shown. Figure 9b A fourth embodiment of the corresponding display wheel is shown.

[0156] In this fourth embodiment, the dial 3 is divided into 68 equidistant sections, wherein two consecutive sections are separated by a first angle α.

[0157] These partitions form a divisible location P. x , where x ranges from 1 to 68.

[0158] In this fourth embodiment, the 60-minute scale indicator is distributed at 60 divisible positions P. x superior.

[0159] Dial 3 comprises four sectors S1, S2, S3, and S4, each with two consecutive partitions, located at position P. 16 P 17 P 33 P 34 P 50 P 51 P 67 P 68 These are virtual and do not have minute indicator markers. Therefore, these divisions are not intended to be positioned by minute hand graduations.

[0160] Therefore, in the first sector S1, between the numbers 15 and 16, the minute hand performs the first long jump with an angle β1, which is three times the angle α corresponding to the short jump between the minute scale numbers.

[0161] At the second sector S2, between the numbers 30 and 31, the minute hand performs a second long jump with an angle β2, which is three times the angle α corresponding to the short jump between the minute scale digits.

[0162] At sector S3, between the numbers 45 and 46, the minute hand performs a third long jump with an angle β3, which is three times the angle α corresponding to the short jump between the minute digits.

[0163] At sector S4, between the numbers 60 and 1, the minute hand performs its fourth long jump with an angle β4, which is three times the angle α corresponding to the short jump between the minute digits.

[0164] In this embodiment, the drive wheel includes 60 indentations for 60 minutes indexed by the minute display component.

[0165] The second round of 120 includes the number of teeth n2, which is defined by the following relationship:

[0166] Where j = 4

[0167] n2=n1+((β1 / α)-1)+((β2 / α)-1)+((β3 / α)-1)+((β4 / α)-1)

[0168] n2=60+(3-1)+(3-1)+(3-1)+(3-1)=68

[0169] Therefore, the second wheel 120 and the fourth wheel have 68 teeth, and the display wheel 130 is equivalent to a wheel with 68 teeth.

[0170] Figure 9b The display wheel 130 shown here includes four smooth corner sectors 131a, 131b, 131c, and 131d equidistantly distributed on the display wheel 130, so as to enable... Figure 9a The minute markers of the dial 3 shown perform the indexing and positioning of the display components, as well as short jumps with angle α and four long jumps with angles β1, β2, β3, and β4.

[0171] The number of cutting teeth n at the first smooth angle sector 131a of the display wheel 130 3 tronq Equals 3:

[0172]

[0173] The number of cutting teeth n′ at the second smooth angle sector 131b of the display wheel 130 3 tronq Equals 3:

[0174]

[0175] The number of cutting teeth n″ at the third smoothing angle sector 131c of the display wheel 130 3 tronq Equals 3:

[0176]

[0177] The number of cutting teeth n″′ at the fourth smoothing angle sector 131d of the display wheel 130 3 tronq Equals 3:

[0178]

[0179] Therefore, in this fourth embodiment, the display wheel 130 is equivalent to a 68-tooth wheel, on which three consecutive teeth are truncated at four smooth angular sectors 131a, 131b, 131c, and 131d.

[0180] The display wheel 130 therefore has 56 effective teeth, that is, 14 consecutive teeth between each smooth corner sector 131a, 131b, 131c, 131d. Thus, the display wheel 130 includes a first toothed section with 14 teeth, a second toothed section with 14 teeth, a third toothed section with 14 teeth, and a fourth toothed section with 14 teeth, each toothed section being separated by smooth corner sectors 131a, 131b, 131c, 131d corresponding to corner sectors of three teeth.

[0181] The present invention also relates to a watch movement including such a sequential display mechanism.

[0182] The present invention also relates to a timepiece, such as a wristwatch, that includes such a timepiece movement.

Claims

1. A clockwork display mechanism (100) comprising a display (3) having a scale, the scale including a plurality of indicator marks distributed on the circumference of the display (3), the scale being configured such that an angular distance separating at least two consecutive indicator marks corresponds to a second angle (β), the second angle (β) being greater than a first angle (α) separating two of other consecutive indicator marks, the clockwork display mechanism (100) being configured to drive a display member (2) in angular motion by a series of short jumps between two indicator marks separated by the first angle (α) and a long jump between two scale indicator marks separated by the second angle (β), the clockwork display mechanism (100) being characterized in that it comprises: - A first wheel (110) called the drive wheel, which is capable of being driven by the watch movement; - A second wheel (120) coaxial with the first wheel (110) and connected to the first wheel (110) via an elastic member (160); - A first intermediate wheel (150), which is directly driven by the first wheel (110) and directly drives a third wheel (130) called the display wheel, which cooperates with the display member (2); the third wheel (130) includes a smooth-angled sector in which at least two teeth are truncated; - A fourth wheel (140) coaxial with the third wheel (130) and rigidly connected in rotation, the fourth wheel (140) meshing with the second wheel via a second intermediate wheel (170); The forward display mechanism is configured such that when the display member (2) is driven to make angular movement by a series of short jumps with the first angle (α) between two indicator marks separated by the first angle (α), the rotational speed of the second wheel (120) is less than the rotational speed of the first wheel (110) so as to progressively wind the elastic member (160) during these short jumps, and the forward display mechanism is configured such that when the tooth of the first intermediate wheel (150) encounters the smooth angular sector of the third wheel (130), the elastic member (160) is unloaded, resulting in an instantaneous passage through the smooth angular sector and resulting in the angular movement achieved by the long jumps with the second angle (β) of the display member (2).

2. The clockwise display mechanism (100) for a clock according to claim 1, characterized in that, The first wheel (110) can be driven by the watch movement in a jumping manner.

3. The clockwise display mechanism (100) for a clock according to claim 1 or 2, characterized in that, The first wheel (110) includes the number of teeth ( The number of teeth ( The number of indicator marks on the scale of the display (3) is equal to the number of the scale markings.

4. The clockwise display mechanism (100) for a timepiece according to claim 3, characterized in that, The second wheel (120) has a greater number of teeth than the first wheel (110). The number of teeth () ).

5. The clockwise display mechanism (100) for a timepiece according to claim 4, characterized in that, The third round (130) includes the effective number of teeth distributed on the tooth section ( ) and the number of cutting teeth located on the smooth angular sector ( The effective number of teeth and the total number of cut teeth form a corresponding number of teeth on the entire circumference of the third wheel (130). ), the equivalent number of teeth on the entire circumference of the third wheel (130) ) equals the number of teeth of the second wheel (120) ( ).

6. The clockwise display mechanism (100) for a timepiece according to claim 5, characterized in that, The number of cutting teeth on the smooth angular sector of the third round (130) ) is an integer corresponding to the ratio of the second angle (β) to the first angle (α).

7. The clockwise display mechanism (100) for a timepiece according to claim 4, characterized in that, The fourth wheel (140) includes the same number of teeth as the second wheel (120). Equal number of teeth ).

8. The clockwise display mechanism (100) for a timepiece according to claim 4, characterized in that, The number of teeth of the second wheel (120) It is determined by the following relationship: ， It is the number of teeth of the first gear (110). It is the number of teeth on the second gear (120); α is the first angle, corresponding to the first angular distance that separates at least two consecutive scale markings; β i The second angle is greater than the first angle α, corresponding to a second angular distance different from the first angle distance, and the second angular distance will be the sector of the scale. At least two other consecutive scale markings are separated at that point; i is an integer between 1 and j; j is the sector corresponding to the scale. The integer corresponding to the total number in the sector In the middle, two consecutive scale indicators are at a second angle greater than the first angle α. Separately spaced.

9. The clockwise display mechanism (100) for a timepiece according to claim 1 or 2, characterized in that, The elastic member (160) is a leaf spring or a coil spring.

10. The clockwise display mechanism (100) for a timepiece according to claim 1 or 2, characterized in that, The elastic member (160) is integral with the first wheel (110), and thus the elastic member (160) includes a first end (161) integral with the first wheel (110) and a second end (162) connected to the second wheel (120), or the elastic member (160) is integral with the second wheel (120), and thus the elastic member (160) includes a first end integral with the second wheel (120) and a second end connected to the first wheel (110).

11. The clockwise display mechanism (100) for a timepiece according to claim 1 or 2, characterized in that, The display (3) includes a calendar scale with 31 indicator marks, and the display element (2) is a calendar pointer.

12. The clockwise display mechanism (100) for a timepiece according to claim 11, characterized in that, The calendar scale includes numbers 1 to 31 and / or markers corresponding to the numbers, with consecutive numbers from 1 to 31 separated by the first angle (α), and the numbers 31 and 1 separated by a second angle (β) greater than the first angle (α).

13. The clockwise display mechanism (100) for a timepiece according to claim 1 or 2, characterized in that, The first wheel (110) includes 31 teeth and is configured to rotate once every 31 days, and the forward display mechanism is configured to progressively wind the elastic member (160) for 31 days.

14. The clockwise display mechanism (100) for a timepiece according to claim 1 or 2, characterized in that, The display (3) includes a minute scale with 60 indicator marks and the display element is a minute hand, or the display (3) includes a second scale with 60 indicator marks and the display element is a second hand.

15. A watch movement, characterized in that, The watch movement includes a clockwise display mechanism (100) for a watch according to any one of claims 1 to 14.

16. A clock, comprising a clock movement, said clock movement including a clockwork display mechanism (100) for the clock according to any one of claims 1 to 14.

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