Timing watch

Abstract

The invention relates to a timepiece watch comprising a timepiece mechanism comprising:-a current time wheel (7) comprising a shaft and arranged to rotate about the shaft,-a first wheel (1) comprising a first shaft (10) and arranged to be connected to the current time wheel (7),-an indication member (24),-a second wheel (2) arranged to mesh with the first wheel (1) and connected to said indication member (24), -an element with a scale (100), said scale comprising a set of indications, said indication means allowing information to be displayed on the scale. The wheels (1, 2) are arranged to obtain a gear ratio between the wheels (1, 2) that varies according to their relative angular position such that the indicating member (24) rotates at a variable rotational speed when corresponding to at least a subset of said set of indications.

Description

Technical Field

[0001] The present invention relates to a chronograph watch, and in particular to a chronograph watch including a clock mechanism that allows an indicating member to rotate at a variable speed. Background Art

[0002] A watch generally comprises a kinematic chain connecting an energy source (e.g., but not limited to, a barrel) to one or more current time mobiles, which are directly or indirectly (e.g., via one or more intermediate mobiles) connected to one or more indicating members (e.g., but not limited to, hands) of the watch to display the current hour, minute, and / or second. Thus, the current time mobile is arranged to rotate continuously at a constant speed.

[0003] A chronograph is a timepiece that measures time. Typically, it has at least one indicating member that can be started and stopped by a button or other control device in order to measure time. It can then return to its starting point. In addition to measuring time, many chronographs also include an indicating member for displaying the current time.

[0004] When a button (or other control device) of a chronograph watch is pressed for the first time, an indicating member at rest at the initial time indication of a first set of time indications, usually carried by the dial, begins to move ("start"). Pressing the same button or another button a second time has the effect of stopping the indicating member at the precise point where it was when it was pressed ("stop"). Pressing the same button or another button a third time causes the indicating member to return quickly to its starting point, i.e. the initial time indication ("reset"). In this way, a length of time can be measured.

[0005] In this context, the term "indication" refers to markings carried by a watch element, such as a dial or a bezel, such as lines, numbers, letters, symbols and / or combinations thereof.

[0006] Some known chronographs, in particular wristwatches, also include a second set of non-time or auxiliary indications, such as tachymeter, pulsometer or telemeter indications, which are also carried by an element of the watch, such as a bezel or dial. Like the set of time indications, this set of auxiliary indications usually also includes an initial auxiliary indication, a final auxiliary indication and possible intermediate auxiliary indications in between.

[0007] The indicating member is usually in a stationary state, and the indicating member is connected to a counting wheel for a given time, such as a chronograph second wheel, a chronograph minute wheel or a chronograph hour wheel. When the user actuates a control device (such as a button) of the chronograph watch, the indicating member starts to rotate.

[0008] In known solutions, the rotation speed of the indicating member is constant. When the condition is met, the user stops the movement of the indicating member, for example using the same button. The indicating member thus stops at the auxiliary indication, or between two adjacent auxiliary indications. Therefore, the user can read the information corresponding to the stop position of the indicating member.

[0009] If the chronograph has a tachymeter scale, this condition for stopping the indicating member is usually a certain distance covered by the person or the moving object as soon as the button of the chronograph is actuated. The moving object can be, for example, a vehicle, such as a car, in particular a sports car. For example, the distance can be 100 meters or 1000 meters. Thus, the user can read the speed of the person or object in motion corresponding to the stop position of the indicating member on the scale.

[0010] If the chronograph watch has a pulsometer scale, this stop condition of the indicating member is usually a certain number of heartbeats counted by the user just after pressing the button of the chronograph watch, such as but not limited to 15 or 30 heartbeats. Thus, the user can read his or another person's heart rate, corresponding to the stop position of the indicating member on the scale.

[0011] If the chronograph watch is equipped with a telemeter scale, this condition for stopping the indicating member is usually the hearing of a sound associated with an event, the rotation of which has been initiated by the user when observing the event. The telemeter scale allows the observer wearing the watch to calculate the distance between the observer and a given point where the event occurred, using the speed of sound (approximately 340 m / s), by comparing the visual of the event and the time required for the user to hear the sound. Therefore, the indicating member stops at a certain indication on the telemeter scale. At this indication, the user can read the distance between him and the given point. For example, the distance can be the distance between the user and a lightning bolt, or the distance between several troops, for example based on the sound of gunfire or explosions heard.

[0012] In most known solutions, the scale of the time indications has a distance between one time indication and the next that is substantially constant throughout the entire set of time indications. In other words, in most known solutions, the time scale has a constant resolution.

[0013] In some known solutions, the scale of the auxiliary indications (for example a tachymeter, pulsometer or telemeter scale) also has a distance between one auxiliary indication and the next that is substantially constant over the entire set of auxiliary indications.

[0014] Generally speaking, the time or auxiliary indication scale has a constant distance between one indication and the next and is of a reasonable length, which is easy for the user to read.

[0015] A scale with a constant distance between one indication and the next, combined with an indication member rotating at a constant speed, allows the user to read information (time or auxiliary) at the same level of detail on all indications (time or auxiliary). However, depending on the application, it may be necessary to provide more (or less) detailed (or precise) information for one or more subsets of all indications on the scale of interest.

[0016] If considering a scale of time indications, such as a scale of measured seconds, it may be interesting to read more precise information around certain subsets of the time indication compared to other subsets, such as in the first 10 seconds or 15 measured seconds.

[0017] This requirement also applies to certain auxiliary indicating scales.

[0018] For example, the heart rate of an athlete under stress is about 180 beats per minute. Therefore, it may be interesting to read more precise information corresponding to a subset around this heart rate.

[0019] Alternatively, a racing car may reach a high speed (e.g., about 200 km / h or more) after traveling a predetermined distance (e.g., 1000 meters). Therefore, it may be of interest to read more precise information corresponding to a subset near this speed.

[0020] Thus, a scale (with time or auxiliary indications) with a constant distance between one indication and the next, combined with an indication member rotating at a constant speed, generally allows the user to read the information well, but it does not allow prioritizing certain subsets of the group of indications (time or auxiliary) that are of interest for a particular application over other subsets.

[0021] In some known solutions, the scale with auxiliary indications has a variable distance between one auxiliary indication and the next, ie a distance that is not constant on all auxiliary indications. In these solutions, the indicating member (usually the indicating member measuring seconds) rotates at a constant speed.

[0022] Although this solution allows to prioritize certain subsets of the set of auxiliary indications of interest for the intended application over other subsets by using a variable distance between an auxiliary indication and the next indication, the readability of the information is not satisfactory. In fact, some distances between the auxiliary indications and the consecutive indications on the scale are so small that they are difficult to read. Moreover, if the indicating member stops between two adjacent indications that are too short, the information read may not be accurate enough for the intended application.

[0023] Document ITBG20090056A1 describes a clock mechanism that displays the current time with a pointer that rotates at a variable speed. The mechanism includes a first wheel (reference 7A) that is integral with a second wheel (reference 7B), which is smaller and arranged in another plane. The first and second wheels rotate around a drive shaft. The first wheel meshes with a portion of a third wheel (reference 7C), which is integral with a portion of a fourth wheel (reference 7D), which is smaller and arranged in the same plane as the second wheel. When the first wheel is no longer in mesh with the third wheel, the second wheel meshes with the fourth wheel. The document points out that the transition between the two gears (first wheel-third wheel and second wheel-fourth wheel) must be done carefully.

[0024] Document JP407209440 relates to a clock mechanism capable of displaying the current time by means of a pointer rotating at a variable speed. The mechanism comprises a gear with an elliptical wheel, which connects a motor shaft to a pointer shaft.

[0025] Document EP2945029 relates to an anti-disturbance clutch device comprising a clutch wheel arranged to maintain an engaged position and a disengaged position, a clutch member and a clutch cam cooperating with the clutch member to define the engaged position and the disengaged position of the clutch wheel.

[0026] Document US490123 relates to a timing mechanism that is clutch-controlled to calculate the current time.

[0027] Document DE 1949177 U relates to a pulsometer having a scale with a plurality of indications with a variable distance between an auxiliary indication and the next indication. The pointer rotates at a constant speed.

[0028] Document CH703579 filed in the name of the applicant relates to a starting, stopping and resetting system for a mechanical chronograph watch. Summary of the invention

[0029] It is an object of the present invention to provide a chronograph watch which is not subject to the limitations of known chronograph watches.

[0030] Another object of the invention is to provide a chronograph watch enabling the user to obtain more or less precise information (ie with improved resolution) for one or more subsets of the desired set of hands with better readability than known solutions.

[0031] Another object of the invention is to provide a chronograph watch which is an alternative to known solutions.

[0032] According to the invention, these objects are achieved in particular by a chronograph watch according to claim 1 .

[0033] The chronograph watch according to the invention comprises a clockwork mechanism comprising:

[0034] - a current time mobile, comprising an axis and arranged to rotate (permanently) about the axis,

[0035] - a first mobile comprising a first axis and arranged to be connected to the current time mobile and to rotate about this first axis at a constant rotational speed,

[0036] - indicating member,

[0037] - a second mobile element, arranged to mesh with the first mobile element and connected to the indicating member,

[0038] An element with a scale comprising a set of indications, the indicating member enabling information (for example the time or auxiliary information) to be displayed on the scale.

[0039] In this context, the term "mobile" refers to a watch part that moves or displaces, in particular a part that moves in rotation about an axis. In this context, a mobile can be a wheel, a cam, etc.

[0040] According to the invention, the first and second mobiles are arranged to obtain a gear ratio between the first and second mobiles which varies as a function of their relative angular position such that the indicating member rotates at a variable rotational speed at at least a subset of the set of indications of the scale.

[0041] Since the indicating member rotates at a variable rotational speed, at least a subset of the group of indications of the scale, several scales can be designed which are easier to read compared to known solutions, while allowing more (or less) detailed (or more or less precise, i.e. with better or worse resolution) information to be displayed for one or more subsets of the group of indications of interest.

[0042] For example, throughout the entire set of indications on the scale, a scale with a constant distance between one indication and the next can be used. Instead of using a scale with a variable distance between one indication and the next, which scale is used in conjunction with an indication member that rotates at a constant rotational speed, the mechanism according to the invention allows the use of a scale with a constant distance, which is therefore easier to read, because the indication member rotates at a variable rotational speed.

[0043] It is also possible to use a scale with a variable distance between one indication and the next, at least for a subset of the set of indications in the scale. This scale, combined with the variable rotation speed of the mechanism according to the invention, allows corresponding to a subset of indications of interest for the desired application, with a (variable) distance between one indication and the next that is greater than the corresponding distance of the known solutions, which allows a better readability and a better resolution of the desired information compared to the known solutions. This scale, combined with the variable rotation speed of the mechanism according to the invention, also allows corresponding to a subset of indications that are not of interest for the desired application, with a (variable) distance between one indication and the next that has a smaller size than the corresponding distance of the known solutions.

[0044] In one embodiment, the scale carries a time indication, such as an indication of seconds, minutes or hours of the current time, or an indication of measured seconds, minutes or hours.

[0045] In one embodiment, the scale carries a secondary indication, such as whether the scale is a tachymeter scale, a pulsometer scale, or a telemetry scale.

[0046] In one embodiment, the clockwork carries both at least one scale with a time indication and at least one scale with an auxiliary indication, both scales cooperating with a same indication member rotating at a variable speed, allowing the user to read the time and the auxiliary indication separately.

[0047] The auxiliary indication scale may be carried by the same element that carries the time indication scale (for example, the dial may carry both scales) or may be carried by another element (for example, the dial may carry the time indication scale and the bezel carries the auxiliary indication scale).

[0048] According to the invention, the clockwork mechanism comprises: - an actuating device, and

[0049] - a clutch mechanism arranged to be able to connect the current time mobile with the first mobile under the action of the actuating means.

[0050] In one embodiment, the mechanism comprises an input moving member, the input moving member comprises an input shaft and is arranged to rotate around the input shaft, the input moving member is arranged to be driven to rotate by the current time moving member. In this embodiment, the clutch mechanism is arranged to connect the current time moving member with the first moving member through the input moving member under the action of the actuating device.

[0051] In one embodiment, the first moving member and the second moving member have the same shape defined by radii of different lengths, and the first moving member and the second moving member are arranged so that the sum of the radii of each moving member of the gear transmission corresponding to the two moving members is constant, and the sum of these radii is equal to the distance between the axes of the two moving members.

[0052] In one embodiment, the sum of these radii lies in the range from 3 mm to 8 mm, preferably from 5 mm to 6 mm, in particular from 5.436 mm to 5.450 mm.

[0053] In one embodiment, the first moving member and the second moving member have the same girth. In another embodiment, the girth of the first moving member is a multiple of the girth of the second moving member. In another embodiment, the girth of the second moving member is a multiple of the girth of the first moving member.

[0054] In the present context, the expression "circumference of a moving element" refers to the original (or reference) circumference of the moving element.

[0055] In one embodiment, wherein the scale indication subset in which the indicating member rotates at a variable rotational speed is a first subset of the group of indications, the group of indications includes a second subset different from the first subset, and each of the first moving member and the second moving member is arranged so that, corresponding to the second scale indication subset, the rotation of the second moving member remains constant.

[0056] In one embodiment, each of the first moving member and the second moving member has the same shape (or profile).

[0057] In one embodiment, each of the first and second moving members is a cam having a spiral shape.

[0058] In one embodiment, each of the first moving member and the second moving member has a logarithmic spiral shape, that is, the shape defined by the vertices of the teeth of each moving member is a part of a logarithmic spiral. In one embodiment, the logarithmic spiral shape is the same for the first moving member and the second moving member.

[0059] The logarithmic spiral shape of each moving part allows to limit the speed variation of the indicating member, in particular for a given time period, for example less than 1 minute from the start-up moment. Therefore, the curve of the speed variation of the indicating member over time is a smooth curve without peaks in this time period. The logarithmic spiral shape of each moving part also gives a logarithmic curve of the torque variation of the indicating member over time, so there is no peak.

[0060] In one embodiment, each of the first moving member and the second moving member includes a moving member body and a tooth portion.

[0061] In one embodiment, each of the first mobile element and the second mobile element comprises at least one notch in order to reduce the imbalance of the indication member when it is reset.

[0062] In one embodiment, each moving member having a logarithmic spiral shape comprises a first notch and a second notch.

[0063] In one embodiment, the first recess is defined by the first proximal portion of the moving member body (i.e., the portion close to the rotating axis of the moving member), the first portion of the moving member tooth portion, and the first arm, which connects one end of the first proximal portion of the moving member body to one end of the first portion of the moving member tooth portion.

[0064] In one embodiment, the second recess is defined by a second proximal portion of the moving member body (adjacent the first proximal portion), the first arm, a second portion of the moving member tooth, and a second arm connecting the end of the tooth to the end of the second proximal portion of the moving member body.

[0065] In one embodiment, the shape and / or size of the first recess of the first moving member is different from the shape and / or size of the first recess of the second moving member. In one embodiment, the shape and / or size of the second recess of the first moving member is different from the shape and / or size of the second recess of the second moving member.

[0066] In one embodiment, the shape and / or size of the first arm of the first moving member is different from the shape and / or size of the first arm of the second moving member. In one embodiment, the shape and / or size of the second arm of the first moving member is different from the shape and / or size of the second arm of the second moving member.

[0067] Compared with the torque maximum value obtained by the circular shape of each moving member, the logarithmic spiral shape of each moving member also allows to have a larger torque maximum value (of the driven moving member). In one embodiment, the logarithmic spiral shape of each moving member also allows the rotational torque maximum value (of the driven moving member) to be three times the torque obtained when each moving member is circular.

[0068] In one embodiment, when the user starts to reset the indicating member, the second mobile member is no longer a driven mobile member, but becomes a driving mobile member. During the reset, the second mobile member drives the first mobile member, and also drives the input mobile member through the first mobile member.

[0069] In one embodiment, the clockwork comprises a heart-shaped piece coaxial with the second mobile.

[0070] The larger maximum value of the torque of the driven mobile obtained by the logarithmic spiral shape of the mobile, combined with the friction of the input mobile, can cause a disengagement between the second mobile and the heart-shaped piece, thereby producing an offset between the rotation of the heart-shaped piece and the rotation of the second mobile, and therefore an offset of the indicating member relative to the dial when the clockwork mechanism is activated at start-up.

[0071] In one embodiment, the clockwork thus comprises a connection means between the second mobile and the heart-shaped piece, enabling them to be integrated, thereby reducing or avoiding any displacement caused during resetting. In one embodiment, the connection means comprises a pin carried by the heart-shaped piece, the pin being arranged to be received by a through hole in the second mobile. In one embodiment, the first arm of the second mobile comprises the through hole. In one embodiment, the through hole is also a means for indexing the heart-shaped piece.

[0072] In another embodiment, the second mobile and the heart-shaped piece constitute a unitary piece, ie a piece realized in an integral manner. This also allows the second mobile to be fixed to the heart-shaped piece, thus avoiding any displacement caused during resetting.

[0073] In one embodiment, the shape of the heart-shaped piece is optimized to compensate for the influence of the logarithmic spiral shape of the second mobile piece, thereby enabling the indication member to be reset.

[0074] In one embodiment, the second moving member and / or the heart-piece comprises heart-piece indexing means, such as a through hole.

[0075] If there is (angular) play between the two mobiles, which allows the second mobile to rotate before being driven by the first mobile, a backward movement of the indication member can be observed when the chronograph is started, in particular a counterclockwise backward movement of the order of several degrees (e.g. 3.5°) relative to the starting position of the indication member.

[0076] In order to reduce or eliminate this play, in one embodiment, the clockwork also includes a play limiting device between the two moving members. In one embodiment, the second moving member includes this play limiting device. In one embodiment, the second arm of the second moving member includes this play limiting device. In one embodiment, this play limiting device includes a projection of the arm of the second moving member, in particular a projection of the second arm of the second moving member.

[0077] In one embodiment, the teeth of the first moving piece and / or the second moving piece are arranged to reduce an overlap of the indication members.

[0078] In one embodiment, the element of the timepiece mechanism according to the invention is a dial or a part of a dial.

[0079] In one embodiment, the element of the timepiece mechanism according to the invention is a bezel or a part of a bezel. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Embodiment examples of the present invention are illustrated in the description shown in the accompanying drawings, in which:

[0081] Figure 1 A top view of a portion of a movement of one embodiment of a chronograph watch according to the invention is shown.

[0082] Figure 2 Shows Figure 1 Perspective view of a part of the clockwork of a chronograph watch.

[0083] Figure 3 Shows Figure 2 Bottom view of the clockwork.

[0084] Figure 4 A top view of a clockwork according to another embodiment of a chronograph watch is shown.

[0085] Figure 5A is a graph showing the variation over time of the speed of rotation of an indication member of a clockwork mechanism according to one embodiment of the invention, compared with the constant speed of known solutions.

[0086] Figure 5B and 5C It is also a graph showing changes over time in the rotation speed of the indicating member of the clock mechanism according to other embodiments of the present invention.

[0087] Figure 6 A top view of the scale of one embodiment of a clockwork of a chronograph watch according to the invention is shown, in particular a 100-meter tachymeter scale with a variable distance between a subsidiary indication and the next subsidiary indication.

[0088] Figure 7 A top view of one embodiment of a scale of a clockwork of a chronograph watch according to the invention is shown, in particular a 1000 m tachymeter scale with a variable distance between a subsidiary indication and the next subsidiary indication.

[0089] Figure 8 A top view of a scale of one embodiment of a clockwork of a chronograph watch according to the invention is shown, in particular a pulsometer scale for 30 pulses, with a variable distance between an auxiliary indication and the next auxiliary indication.

[0090] Fig. 9 A top view of an embodiment of a scale of a clockwork of a chronograph watch according to the invention is shown, in particular a pulsometer scale for 15 pulses, with a variable distance between an auxiliary indication and the next auxiliary indication.

[0091] Fig.10 A top view of one embodiment of a scale of a clockwork of a chronograph watch according to the invention is shown, in particular a telemeter scale with a variable distance between a subsidiary indication and the next subsidiary indication. DETAILED DESCRIPTION

[0092] In the following description, provided by way of example, reference will be made to a scale comprising a plurality of indications, the distance between one indication and the next being variable at least for a subset of the set of indications. However, it should be understood that the invention is not limited to these embodiments, but also comprises a clockwork comprising a scale with several indications, the distance between one indication and the next being constant for the entire set of indications.

[0093] Figure 1 A top view of a portion of a movement 1000 of one embodiment of a chronograph watch according to the invention is shown.

[0094] exist Figure 1 In the embodiment shown, the movement 1000 displays the current time in addition to the measured duration. In another embodiment (not shown), the movement 1000 does not display the current time.

[0095] Since the operation of a 1000 chronograph watch movement (with or without current time display) is known per se, it will not be described in detail here. As a non-limiting example, Figure 1 The operation of the 1000 chronograph movement shown in FIG is based on a column wheel 4 , which is usually connected to a lever 5 .

[0096] The agency (part of which is Figure 2 and Figure 3 ) comprises an input movable member 8, which comprises an input shaft 10 and is arranged to rotate around the input shaft 10, preferably permanently.

[0097] exist Figure 2 and Figure 3 In the example shown, the input mobile 8 is driven to rotate by the current time mobile 7 in the kinematic chain, so that the current time can be calculated and displayed, that is, the kinematic chain connects the energy source (e.g., barrel) with the gears of the regulating mechanism and the watch, and these gears are connected with the indicating member of the watch to display the current hour, minute and / or second. The current time mobile 7 can be, for example, a current second wheel, and is therefore arranged to rotate around its axis 70 at a constant rotation speed (e.g., one revolution per minute (or 6° per second)). In the example shown, the input mobile 8 also rotates at a constant speed, for example, at the same speed of one revolution per minute.

[0098] The clutch mechanism is arranged so that, under the action of the actuating means, the input mobile 8 can be connected to the first mobile 1 of the mechanism according to the invention.

[0099] The clutch mechanism may be a horizontal or lateral clutch, a vertical clutch, an oscillating pinion clutch, etc. Since the clutch mechanism itself is known, it will not be described in detail here. Figure 2 and Figure 3A vertical clutch mechanism is shown, comprising a flange 9. After the user presses a button (not shown) of the chronograph watch, an actuating device (not shown) comprising, for example, a pliers (not shown) enables the flange 9 to move along the rotation axis 10, thereby creating a clutch between the input mobile 8 and the first mobile 1.

[0100] Of course, in Figure 2 and Figure 3 The fact that in the example shown the axis of rotation of the input mobile element 8 corresponds to the axis of rotation 10 of the first mobile element 1 is not an essential feature of the invention and depends on the type of clutch chosen.

[0101] Therefore, when the first moving member 1 is connected to the input moving member 8 through the clutch mechanism, the first moving member 1 can rotate around the shaft 10 at a constant speed.

[0102] In one embodiment, the rotation speed of the first moving member 1 is equal to the rotation speed of the input moving member 8, for example but not limited to, one revolution per minute. In another embodiment, the rotation speed of the first moving member 1 is different from the rotation speed of the input moving member 8, for example, the rotation speed of the first moving member 1 is lower.

[0103] The first mobile element 1 is therefore a driving mobile element which is rotated by the user about its axis of rotation 10 .

[0104] The clock mechanism 100 according to the invention further comprises a second mobile 2 arranged to mesh with the first mobile 1 and connected to the indicating member (at Figures 1 to 3 not shown).

[0105] The second mobile element 2 is thus driven by the first mobile element 1. It rotates around its axis of rotation 20.

[0106] The clockwork according to the invention also comprises a component ( Figures 1 to 3 (not shown), such as a dial (or part of a dial) or a bezel (or part of a bezel) with a scale comprising a set of indications, the indication member allowing information to be displayed on the scale, such as the time or auxiliary information (such as rotation speed, pulse or telemetry information). Examples of auxiliary indication scales are for example Figures 6 to 10 , which will be discussed later. The scale generally has an arc or substantially circular shape. Of course, the scale can have other shapes, such as but not limited to a spiral shape.

[0107] According to the invention, first mobile 1 and second mobile 2 are arranged to obtain a gear ratio between first mobile 1 and second mobile 2 that varies as a function of their relative angular position, so that the indicating member rotates at a variable rotational speed at at least a subset of the set of pointers carried by the scale.

[0108] Specifically, indicating member rotates with a variable rotational speed because it is connected to the second mobile member 2, and the second mobile member 2 rotates with a variable rotational speed corresponding to at least one subset in the indicating group. In a preferred embodiment, the rotational speed of the second mobile member 2 corresponds to the rotational speed of the indicating member. In a preferred embodiment, the indicating member is installed on the rotation axis 20 of the second mobile member 2.

[0109] Since the indicating member rotates at a variable rotational speed, it is possible to design, on at least a subset of the indication groups carried by the scale, several scales that are easier to read than known solutions, while allowing more (or less) detailed (or more or less precise) information to be displayed for one or more subsets of the indication groups of interest.

[0110] In a preferred embodiment, the first moving member 1 and the second moving member 2 have the same shape. In another embodiment, the first moving member 1 and the second moving member 2 have different shapes.

[0111] In a preferred embodiment, the shape is defined by radii of different lengths, the first mobile member 1 and the second mobile member 2 being arranged so that the sum of the radii R1, R2 of each mobile member 1, 2 corresponding to the gear transmission of the two mobile members is constant, for example Figure 1 shown.

[0112] Advantageously, the sum of these radii R1 and R2 is equal to the distance between the axes of the two mobile elements 1 and 2 , ie the distance between the axis of rotation 10 of the first mobile element and the axis of rotation 20 of the second mobile element.

[0113] In one embodiment, the sum of these radii R1 and R2 is in the range of 3 mm to 8 mm, preferably in the range of 5 mm to 6 mm, in particular in the range of 5.436 mm to 5.450 mm.

[0114] In one embodiment, the first moving member 1 and the second moving member 2 have the same circumference. In another embodiment, the circumference of the first moving member 1 is a multiple of the circumference of the second moving member 2. In another embodiment, the circumference of the second moving member 2 is a multiple of the circumference of the first moving member 1.

[0115] Thanks to the timepiece mechanism according to the invention, several display possibilities can be designed according to the needs of a specific application, while improving the readability of the information for the user, at least in an interesting subset of the indications carried by the graduations, according to the desired application.

[0116] exist Figures 1 to 3 In the illustrated embodiment, each of the first moving member 1 and the second moving member 2 is a helical cam.

[0117] In one embodiment, an example of which can be found in Figure 4 , each of the first and second moving members has a logarithmic spiral shape, that is, the shape defined by the vertices of the teeth of each moving member is a part of the logarithmic spiral SL1, SL2. In one embodiment, the logarithmic spiral shape is the same for the first moving member and the second moving member.

[0118] The logarithmic spiral shape of each moving part allows limiting the speed variation of the indicating member, in particular within a given time period, for example less than 1 minute from start-up. Therefore, the curve of the speed variation of the indicating member over time is a smooth curve without peaks within this time period. The logarithmic spiral shape of each moving part also gives a logarithmic curve of the torque variation of the indicating member over time, so there is no peak.

[0119] In one embodiment, each of the first moving member 1 and the second moving member 2 includes a moving member body and a tooth portion.

[0120] In one embodiment, each of the first mobile 1 and the second mobile 2 comprises at least one notch in order to reduce the imbalance of the indication member when it is reset.

[0121] In one embodiment, each moving member having a logarithmic spiral shape includes a first notch (reference numeral 12' for the first moving member 1 and reference numeral 22' for the second moving member 2) and a second notch (reference numeral 12" for the first moving member 1 and reference numeral 22" for the second moving member 2).

[0122] In one embodiment, each first recess 12', 22' is defined by a first proximal portion 15, 25 (i.e., a portion close to the rotating axis of the moving member) of the main body of the moving member 1 or 2, a first portion 17, 27 of the tooth portion of the moving member, and a first arm 13, 23, respectively, the first arm connecting one end of the first proximal portion 15, 25 of the main body of the moving member to one end of the first portion 17, 27 of the tooth portion of the moving member 1 or 2.

[0123] In one embodiment, each second recess 12", 22" is defined by a second proximal portion 16, 26 (adjacent to the first proximal portion 15, 25) of the body of the moving member 1 or 2, a first arm 13, 23, a second portion 18, 28 of the tooth portion of the moving member 1 or 2, and a second arm 19, 29, respectively, and the second arm 19, 29 connects one end of the tooth portion to one end of the second proximal portion 16, 26 of the body of the moving member 1 or 2.

[0124] In one embodiment, the shape and / or size of the first recess 12' of the first movable member 1 is different from the shape and / or size of the first recess 22' of the second movable member 2. In one embodiment, the shape and / or size of the second recess 12" of the first movable member 1 is different from the shape and / or size of the second recess 22" of the second movable member 2.

[0125] In one embodiment, the shape and / or size of the first arm 13 of the first moving member 1 is different from the shape and / or size of the first arm 23 of the second moving member 2. In one embodiment, the shape and / or size of the second arm 19 of the first moving member 1 is different from the shape and / or size of the second arm 29 of the second moving member 2.

[0126] The logarithmic spiral shape SL1, SL2 of each moving member also allows for a greater maximum torque (of the driven moving member) than the maximum torque obtained with the circular shape of each moving member. In one embodiment, the logarithmic spiral shape SL1, SL2 of each moving member also allows for a maximum torque (of the driven moving member) that is three times the maximum torque obtained with the circular shape of each moving member.

[0127] In one embodiment, when the user starts the indicating member to reset, the second mobile member 2 is no longer a driven mobile member, but becomes a driving mobile member. During the reset, the second mobile member 2 drives the first mobile member 1, and also drives the input mobile member 8 through the first mobile member.

[0128] In one embodiment, the clockwork comprises a heart-shaped piece 3 coaxial with the second mobile 2 .

[0129] The maximum value of the torque of the larger driven mobile obtained by the logarithmic spiral shape of the mobile s, combined with the friction of the input mobile, can cause a disengagement between the second mobile 2 and the heart-shaped piece 3, thereby producing an offset between the rotation of the heart-shaped piece 3 and the rotation of the second mobile 2, and therefore an offset of the indicating member relative to the dial when the clockwork mechanism is activated at start-up.

[0130] In one embodiment, the clockwork thus comprises connection means between the second mobile 2 and the heart-shaped piece 3, enabling them to be integral, thus avoiding any displacement caused during resetting. In one embodiment, the connection means comprises a pin 33 (at Figure 4 The pin 33 is carried by the heart-shaped member 3 and arranged to be received by a through hole in the second mobile member 2. Figure 4 In the embodiment shown, the first arm 23 of the second mobile member 3 comprises the through hole 21. In one embodiment, the through hole 21 is also a means for indexing the heart-shaped member 3.

[0131] In another embodiment (not shown), the second mobile 2 and the heart-shaped piece 3 form a one-piece part, ie a part made in an integral manner. This also allows the second mobile 2 to be fixed to the heart-shaped piece 3, thus avoiding any displacement caused during resetting.

[0132] In one embodiment, the shape of heart-piece 3 is optimized to compensate for the influence of the logarithmic spiral shape of second mobile 2 , thereby enabling the indication member to be reset.

[0133] If there is (angular) play between the two mobiles 1, 2, which allows the second mobile 2 to rotate before it is driven by the first mobile 1, a backward movement of the indicating member can be observed when the chronograph is started, in particular a counterclockwise backward movement of the order of several degrees (e.g. 3.5°) relative to the starting position of the indicating member.

[0134] In order to reduce or eliminate the clearance, in one embodiment, the clock mechanism further includes a clearance limiting device between the two moving parts 1 and 2. Figure 4 In the embodiment shown, the second arm 29 of the second mobile member 2 comprises this play limiting means in the form of a protrusion 290 of the second arm 29 .

[0135] In one embodiment, the protrusion 290 is arranged to contact the arm 19 of the first moving member 1, and in particular the outer surface 191 of the arm 19, before the second moving member 2 is driven by the first moving member 1 through its respective tooth portion. The outer surface 191 of the arm 19 is located at the distal end of the opening 12".

[0136] In one embodiment, this projection 290 is the projection of the outer surface 291 of arm 29, pointing to the first moving member 1. In one embodiment, this projection 290 has a ridge or circle. In one embodiment, the maximum height h of this projection 290 is less than the height of the tooth of the first moving member 1 and / or the second moving member 2.

[0137] In one embodiment, the protrusion 290 is positioned so that it contacts the end of the arm 19 away from the rotation center 10, that is, the end of the arm 19 close to the tooth portion (especially the end tooth) of the first movable member 1. In one embodiment, the protrusion 290 is arranged to basically correspond to the central portion of the outer surface 291 of the arm 29.

[0138] In one embodiment, the protrusion 290 and the arm 29 form a one-piece, ie, integrally made piece. In another embodiment, the protrusion 290 and the arm 29 are two separate parts, which are connected together by a (removable or detachable) connection means.

[0139] In another embodiment, the first and second moving members 1, 2 have other shapes than a spiral, but rather are similar to a potato-shaped or toothed cam.

[0140] In general, the shapes of the first and second moving members 1 and 2 can be calculated by a calculation module, taking into account the constraints of the desired rotation speed in a subset of the scales of interest and / or within the corresponding measurement time interval, the constraint that the sum of the radii of each moving member of the transmission device corresponding to the two moving members is a constant (the sum of these radii is equal to the distance between the axes of the two moving members 1 and 2), and one of the constraints on the circumference of the two moving members.

[0141] In one embodiment, the clockwork according to the invention comprises a heart-shaped piece 3 coaxial with the second mobile 2 (in Figure 2 and Figure 3 (see ).

[0142] In one embodiment, the second mobile member 2 and / or the heart-shaped member 3 comprises means for indexing the heart-shaped member, for example Figure 2 The through hole 21 in Figure 2 better visible in ) or Figure 3 The through holes 31 in the PCB must be aligned to achieve this indexing.

[0143] In one embodiment, the teeth of the first moving piece and / or the second moving piece are arranged to reduce an overlap of the indication members.

[0144] In an embodiment where the first mobile 1 rotates at a speed that can be measured in seconds, for example at a speed of one revolution per minute, it can be connected to a device such as Figure 2 6, which enables another measuring time mobile, for example a measuring minute mobile, to rotate, for example, via a spring. The measuring minute mobile, in turn, can be connected to a similar Figure 2 The element of the plate 6 in the embodiment of the present invention enables another measuring time mobile, for example a measuring hour mobile, to rotate in a similar manner.

[0145] When the user starts the rotation of the indication member, the input mobile member 8 drives the first mobile member 1, and then drives the second mobile member 2. In one embodiment, when the user starts the resetting of the indication member, after the hammer (not shown) acts on the heart-shaped member 3, the second mobile member 2 drives the input mobile member 8 through the first mobile member 1.

[0146] Figure 5A 1 is a graph showing the variation of the rotation speed v of the indication member of the clockwork mechanism according to one embodiment of the invention over time, relative to the constant speed of the known solutions, which is typically 6° per second. In the example shown, the rotation speed of the indication member, which is greater than 6° per second when it is activated, decreases in the range 0-t3 with a decreasing law (e.g. a logarithmic decreasing law), for example, t3 is 60 seconds.

[0147] Figure 5B and 5C It is also a graph showing changes over time in the rotation speed of the indicating member of the clock mechanism according to other embodiments of the present invention.

[0148] exist Figure 5B In the example shown, the rotation speed decreases according to the first law in the range of 0-t1 (e.g., corresponding to the first subset of the pointer group), remains constant in the range of t1-t2 (e.g., corresponding to the second subset of the pointer group), and decreases according to the second law in the range of t2-t3 (e.g., corresponding to the third subset of the pointer group).

[0149] exist Figure 5C In the example shown, the rotation speed increases in the range 0-t1 (e.g., corresponding to the first subset of the pointer group), remains constant in the range t1-t2 (e.g., corresponding to the second subset of the pointer group), and decreases in the range t2-t3 (e.g., corresponding to the third subset of the pointer group).

[0150] The clockwork according to the invention thus allows several speed curves to be designed for the indication member. This, combined with a graduation of indications (time or auxiliary) with a constant or variable distance between one indication and the next, enables the user to obtain more or less detailed information on one or more subsets of the desired group of indications with better readability than known solutions.

[0151] In one embodiment, the scale of the mechanism according to the invention is a time scale with an indication of measured time, such as measured seconds, minutes or hours. In one embodiment, the first mobile and the second mobile are arranged to enable a user to more accurately read the time in at least one subset of the pointer group carried by the scale. In a preferred embodiment, the subset corresponds to the 0-10 second interval of the measured seconds.

[0152] In one embodiment, the clockwork according to the invention is provided with a tachymeter scale.

[0153] Figure 6 A top view of an embodiment of a tachymeter scale 100 of a clockwork mechanism according to the invention is shown. In this embodiment, the mechanism according to the invention further comprises a scale 300 measuring time, for example a scale measuring seconds.

[0154] exist Figure 6 In the illustrated embodiment, the tachymeter scale 100 and the measuring seconds scale 300 share the same scale symbol, the values ​​of the tachymeter scale 100 are arranged on the outer arc of a circle, and the values ​​of the measuring seconds scale 300 are arranged on the inner arc of a circle, and the two arcs have the same center 20.

[0155] The tachymeter scale 100 is particularly suitable for an athlete running a distance of 100 meters, with an indication of the average speed over this distance, measured in km / h. It has an initial auxiliary indication 101 of 100 km / h (this value is not limiting), a final auxiliary indication 102 of 10 km / h (this value is also not limiting) and intermediate auxiliary indications in between. Of course, the initial, final and intermediate auxiliary indications are given only as examples and are not limiting. This applies to Figures 6 to 10 All scales shown in .

[0156] like Figure 6 As can be seen in the figure, the auxiliary indications have a variable distance between one indication and the next. In the example shown, in the subset between 100 km / h and 80 km / h, they are spaced 10 km / h, and the distance between one indication and the next in the first subset gradually increases; in the subset between 80 km / h and 40 km / h, they are spaced 5 km / h, and the distance between one indication and the next in the second subset also gradually increases; finally, in the subset between 40 km / h and 10 km / h, they are spaced 1 km / h, and the distance between one indication and the next in the third subset gradually increases.

[0157] The scale 100 has an arc shape, the center of which is located at the rotation axis 20. The indicating member is arranged to rotate around the rotation axis 20, and one end of it is located at twelve o'clock when stationary. Corresponding to this angular position (indicated by reference numeral 201), the measuring time scale 300 usually carries an initial indication of the measuring time (not shown), for example 0 seconds.

[0158] When a button (or other control device) on a chronograph watch is pressed for the first time, the indicating member begins to rotate in the direction indicated by arrow A.

[0159] In one embodiment, Figure 6 The first and second mobile members 1 and 2 cooperating with the scale 100 are arranged so that the indicating member rotates at a decreasing speed as the indicating member rotates.

[0160] In this embodiment, the first and second moving members 1, 2 may have a spiral shape, such as a logarithmic spiral.

[0161] Pressing the same button or another button again causes the indicator member to stop at the precise point where the button was pressed.

[0162] Figure 6The scale 100, in combination with the variable rotational speed of the mechanism according to the invention, allows - at a subset of indications of interest for the intended applications - to have a (variable) distance between one indication and the next that is greater than the corresponding distance (also variable) of the known solutions, which allows, relative to the known solutions, a better readability and resolution of the desired information corresponding to the stop points of the indication member.

[0163] This scale 100 , in combination with the variable rotation speed of the mechanism according to the invention, also allows - at a subset of indications that are not of interest for the intended application - to have a (variable) distance between one indication and the next that is smaller than the corresponding distance (also variable) of the known solutions.

[0164] This provides parameterized levels of detail for different subsets depending on the application of interest, while making the required information easier to read compared to known solutions.

[0165] like Figure 6 As can be seen in FIG. 2 , the indications on the chronograph scale 300 also have a variable distance between one indication and the next.

[0166] Figure 6 The initial indication 301 of the measuring time scale 300 in the embodiment of the invention is offset relative to the initial indication 101 of the rotational speed scale 100, and the final indication 302 of the measuring time scale 300 shares the same scale symbol as the final indication 102 of the rotational speed scale 100. However, this embodiment is not restrictive and any other arrangement of indications of the two scales can be envisaged. This also applies to Figures 6 to 10 Embodiment of the invention.

[0167] Figure 6 The measuring seconds scale 300, combined with the variable rotational speed of the mechanism according to the invention, also allows - at the subset of indications of interest for the intended applications - to have a (variable) distance between one indication and the next which has a larger dimension than the corresponding distances (also variable) of known solutions, which allows a better readability and resolution of the required information corresponding to the stop points of the indication mechanism compared to known solutions.

[0168] Figure 7 A top view of an embodiment of a scale 100 of a clockwork mechanism according to the invention is shown, in particular a 1000 m tachymeter scale. In this embodiment, the mechanism according to the invention further comprises a measuring time scale 300, for example a scale measuring seconds.

[0169] Also in Figure 7In the illustrated embodiment, the tachymeter scale 100 and the measured seconds scale 300 share the same scale symbol, the values ​​of the tachymeter scale 100 are arranged on the outer arc of a circle, and the values ​​of the measured seconds scale 300 are arranged on the inner arc of a circle, and the two arcs have the same center 20.

[0170] The speedometer scale 100 is particularly suitable for a car travelling a distance of 1000 metres (e.g. between two grades on a motorway) and has an indication of the average speed over this distance, measured in km / h. It has an initial auxiliary indication 101 of 400 km / h, a final auxiliary indication 102 of 60 km / h and intermediate auxiliary indications in between.

[0171] like Figure 7 It can be seen that in the subset between 400km / h and 200km / h, the auxiliary indication interval is 10km / h, and the distance between one indication and the next indication in the first subset gradually increases. In the subset between 200km / h and 60km / h, the auxiliary indication interval is 5km / h, and the distance between one indication and the next indication in the second subset also gradually increases.

[0172] The scale 100 has an arc shape, the center of which is located at the rotation axis 20. The indicating member is arranged to rotate around the rotation axis 20, and its end is located at twelve o'clock when stationary, where an auxiliary final indication 102 is also provided.

[0173] When a button (or other control device) on a chronograph watch is pressed for the first time, the indicating member begins to rotate in the direction indicated by arrow A.

[0174] In one embodiment, Figure 7 The first and second mobile members 1 and 2 cooperating with the scale 100 are arranged so that the indicating member rotates at a decreasing speed as the indicating member rotates.

[0175] In this embodiment, the first and second moving members 1, 2 may also have a spiral shape, such as a logarithmic spiral.

[0176] Pressing the same button or another button again causes the indicator member to stop at the precise point where the button was pressed.

[0177] and Figure 6 The scale in is the same as Figure 7 The 100 scales in the 3D CAD system have customized detail levels for different subsets depending on the application of interest, while allowing better readability of the required information compared to known solutions.

[0178] and Figure 6 The scale in is the same as Figure 7The measurement time scale 300 in has a customized level of detail for different subsets while allowing a better readability of the required information compared to known solutions.

[0179] Figure 8 A top view of an embodiment of a scale 100 of a clockwork mechanism according to the invention is shown, in particular a pulsometer scale for 30 pulses. This scale 100 is particularly suitable for calculating the heart rate of an athlete. In this embodiment, the mechanism according to the invention also comprises a scale 300 for measuring time, for example a scale for measuring seconds.

[0180] Likewise, in Figure 8 In the illustrated embodiment, the pulsometer scale 100 and the measured seconds scale 300 share the same scale symbol, the values ​​of the pulsometer scale 100 are arranged on the outer arc of a circle, and the values ​​of the measured seconds scale 300 are arranged on the inner arc of a circle, and the two arcs have the same center 20.

[0181] The pulsometer scale 100 has a heart rate indication measured in pulses per minute (pulps / min). It has an initial auxiliary indication 101 of 200 pulses / min, a final auxiliary indication 102 of 41 pulses / min, and intermediate auxiliary indications therebetween.

[0182] like Figure 8 It can be seen that in the subset between 200 pulses / minute and 140 pulses / minute, the auxiliary indications are spaced at 10 pulses / minutes, and in the first subset, the distance between one indication and the next gradually increases; in the subset between 140 pulses / minute and 80 pulses / minute, the auxiliary indications are spaced at 5 pulses / minutes, and in the second subset, the distance between one indication and the next also gradually increases; in the subset between 80 pulses / minute and 41 pulses / minute, the auxiliary indications are spaced at 1 pulse / minute, and in the third subset, the distance between one indication and the next also gradually increases.

[0183] The scale 100 has an arc shape, the center of which is located at the rotation axis 20. The indicating member is arranged to rotate around the rotation axis 20, and one end of it is located at twelve o'clock when stationary. Corresponding to this angular position (indicated by reference numeral 201), the measuring time scale 300 usually carries an initial indication of the measuring time (not shown), for example 0 seconds.

[0184] When a button (or other control device) on a chronograph watch is pressed for the first time, the indicating member begins to rotate in the direction indicated by arrow A.

[0185] In one embodiment, Figure 8The first and second mobile members 1 and 2 cooperating with the scale 100 are arranged so that the indicating member rotates at a decreasing speed as the indicating member rotates.

[0186] In this embodiment, the first and second moving members 1, 2 may have a spiral shape, such as a logarithmic spiral.

[0187] Pressing the same button or another button again causes the indicating member to stop at the precise point at which the plunger was depressed.

[0188] Figure 8 The scale 100, in combination with the variable rotational speed of the mechanism according to the invention, allows - at a subset of indications of interest for the intended applications - to have a (variable) distance between one indication and the subsequent indication that is greater than the corresponding distances of the known solutions, which allows, compared to the known solutions, a better readability and resolution of the desired information corresponding to the stop points of the indication member.

[0189] This scale 100 , in combination with the variable rotation speed of the mechanism according to the invention, also allows - at a subset of indications that are not of interest for the intended application - to have a (variable) distance between one indication and the next that has a smaller dimension than the corresponding distances of known solutions.

[0190] This provides a parameterized level of detail for each subset according to the application of interest, while making the required information easier to read compared to known solutions.

[0191] Figure 8 The measurement time scale 300 in also has customized detail levels for different subsets, while allowing better readability of the required information compared to known solutions.

[0192] Fig. 9 A top view of an embodiment of a scale 100 of a clockwork mechanism according to the invention is shown, in particular a pulsometer scale for 15 pulses. This scale 100 is also particularly suitable for calculating the heart rate of an athlete. In this embodiment, the mechanism according to the invention also comprises a scale 300 for measuring time, for example measuring seconds.

[0193] Likewise, in Fig. 9 In the illustrated embodiment, the pulsometer scale 100 and the measured seconds scale 300 share the same scale symbol, the values ​​of the pulsometer scale 100 are arranged on the outer arc of a circle, and the values ​​of the measured seconds scale 300 are arranged on the inner arc of a circle, and the two arcs have the same center 20.

[0194] The pulsometer scale 100 has a heart rate indication measured in pulses per minute (pulps / min). It has an initial auxiliary indication 101 of 200 pulses / min, a final auxiliary indication 102 of 40 pulses / min, and intermediate auxiliary indications therebetween.

[0195] right Figure 8 The same considerations apply to the scale in Fig. 9 The scale in .

[0196] Fig.10 A top view of an embodiment of a scale 100 of a clockwork mechanism according to the invention, in particular a telemeter scale, is shown. In this embodiment, the mechanism according to the invention also comprises a scale 300 measuring time, for example measuring seconds.

[0197] Also in Fig.10 In the illustrated embodiment, the telemetry scale 100 and the measured seconds scale 300 share the same scale symbol, the values ​​of the telemetry scale 100 are arranged on the outer arc of a circle, and the values ​​of the measured seconds scale 300 are arranged on the inner arc of a circle, and the two arcs have the same center 20.

[0198] This telemetry scale 100 is particularly suitable for calculating distances in meters. It has an initial auxiliary indication 101 of 0.10 meters, a final auxiliary indication 102 of 20.00 meters, and intermediate auxiliary indications in between. Of course, the initial, final and intermediate auxiliary indications are given only as examples and are not limiting.

[0199] like Fig.10 It can be seen that the spacing of the auxiliary indications is, in the subset between 0.10km and 1.00km, at intervals of 0.10km, in the first subset the distance between one indication and the next indication is constant; in the subset between 1.00km and 5.00km, at intervals of 0.25km, in the second subset the distance between one indication and the initial continuous indication is variable and decreases in the direction of arrow A; and in the subset between 5.00km and 20.00km, at intervals of 0.50km, in the third subset the distance between one indication and the continuous indication is variable and further decreases in the direction of arrow A.

[0200] The indicating member is arranged to rotate about an axis of rotation which generally corresponds to the axis of rotation 20 of the second mobile 20 and passes through a centre of a circle having an arc with graduations 100 and having an end corresponding to twelve o'clock when the indicating member is at rest.

[0201] When a button (or other control device) on a chronograph watch is pressed for the first time, the indicating member begins to rotate in the direction indicated by arrow A.

[0202] In one embodiment, Fig.10 The first and second mobile members 1 and 2 cooperating with the scale 100 are arranged so that the indicating member rotates at a decreasing speed as the indicating member rotates.

[0203] In this embodiment, the first and second moving members 1, 2 may have a spiral shape, such as a logarithmic spiral.

[0204] although Figures 6 to 10 An example of a scale with both specific auxiliary indications and time indications is shown, but the invention should not be limited to such a scale, but is also applicable to scales without time indications or without auxiliary indications and to scales with other auxiliary and / or time indications or with Figures 6 to 10 Other scales of arrangements different from the arrangement shown in .

[0205] With the mechanism described in the invention, it is also possible to use a scale with a constant distance between one indication and the next.

[0206] Reference numbers used in the figures

[0207] 1First moving part

[0208] 2 Second moving part

[0209] 3 heart-shaped pieces

[0210] 4 Column wheel

[0211] 5 Leverage

[0212] 6 boards

[0213] 7 Mobile pieces of current time

[0214] 8 Input moving parts

[0215] 9 Flange

[0216] 10 Rotation axis of the first moving member

[0217] 12' First notch of the first moving member

[0218] 12" Second notch of the first moving member

[0219] 13 First arm of the first moving member

[0220] 15 first proximal portion of the first moving member

[0221] 16 Second proximal portion of the first moving member

[0222] 17 The first part of the teeth of the first moving member

[0223] 18 The second part of the teeth of the first moving member

[0224] 19 Second arm of the first moving member

[0225] 20 Rotation axis of the second moving member

[0226] 21 Index holes

[0227] 22' First notch of the second moving member

[0228] 22" Second notch of the second moving member

[0229] 23 First arm of the second moving member

[0230] 24 Indicator

[0231] 25 first proximal end portion of the second moving member

[0232] 26 second proximal end portion of the second moving member

[0233] 27 The first part of the tooth of the second moving member

[0234] 28 The second part of the teeth of the second moving member

[0235] 29 The second arm of the second moving member

[0236] 31 Index holes

[0237] 33 pins

[0238] 61 Initial Instructions

[0239] 62 Final Instructions

[0240] 70Current Timeline

[0241] 100 auxiliary indicator scale

[0242] 101 Initial Aid Instructions

[0243] 102 Final Auxiliary Instructions

[0244] 103 indicates the closing condition of the component

[0245] 191 Outer surface of arm 19

[0246] 201 angular position 12h

[0247] 290 protrusion

[0248] 291 Outer surface of arm 29

[0249] 300 time indication scale

[0250] 301 Initial Time Indication

[0251] 302 Final Time Indication

[0252] 1000 Movement

[0253] A indicates the direction of rotation of the component

[0254] hThe maximum height of the protrusion

[0255] R1 The radius of the first moving part when it is meshed with the second moving part

[0256] R2 is the radius of the second moving part when it meshes with the first gear

[0257] SL1 first logarithmic spiral shape

[0258] SL2 Second logarithmic spiral shape

[0259] t i time

[0260] v indicates the rotation speed of the component

Claims

1. A chronograph watch comprising a clock mechanism, the clock mechanism comprising: - a current time mobile (7), comprising an axis (70) and arranged to rotate about this axis (70), a first mobile (1) comprising a first axis (10) and arranged to be connected to the current time mobile (7) and to rotate about this first axis (10) at a constant rotation speed, - an indicating member (24), - a second mobile element (2) arranged to engage with the first mobile element (1) and connected to said indicating member (24), - an element with a scale (100) comprising a set of indications, said indication means allowing the information on this scale to be displayed, - an actuating device, - a clutch mechanism (9) arranged to connect the current time mobile (7) to the first mobile (1) under the action of the actuating device, It is characterized in that The first mobile (1) and the second mobile (2) are arranged to obtain a gear ratio between the first mobile (1) and the second mobile (2), which gear ratio varies according to their relative angular position, so that the indicating member (24) rotates at a variable rotational speed corresponding to at least a subset of the set of indications.

2. The chronograph watch according to claim 1, comprising: - an input mobile (8), comprising an input shaft and arranged to rotate about the input shaft, the input mobile being arranged to be driven in rotation by the current time mobile (7), The clutch mechanism (9) is arranged to be able to connect the current time moving member (7) with the first moving member (1) through the input moving member (8) under the action of the actuating device.

3. A chronograph watch according to any one of claims 1 to 2, the scale (100) comprising a plurality of indications, the distance between one indication and the next being constant for the entire group of indications.

4. A chronograph watch according to claims 1 to 2, the scale (100) comprising a plurality of indications, the distance between one indication and the next being variable at least for a subset of the set of indications.

5. The chronograph watch according to any one of claims 1 to 4, wherein the scale (100) is a tachymeter scale, a pulsometer scale or a telemeter scale.

6. The chronograph watch according to any one of claims 1 to 5, wherein the first mobile element (1) and the second mobile element (2) have the same shape.

7. A chronograph according to claim 6, wherein the shape is defined by radii of different lengths, the first mobile (1) and the second mobile (2) being arranged in such a way that the sum of the radii of each mobile corresponding to the gear transmission of the two mobiles is constant, the sum of these radii being equal to the distance between the axes of the two mobiles.

8. Chronograph watch according to claim 7, the sum of the radii belonging to the range from 3 mm to 8 mm, preferably from 5 mm to 6 mm, in particular from 5.436 mm to 5.450 mm.

9. The chronograph watch according to any one of claims 1 to 8, wherein the scale indication subset is a first subset, the group of indications includes a second subset different from the first subset, and each of the first mobile member and the second mobile member is arranged so that the rotation of the second mobile member is kept constant corresponding to the second scale indication subset.

10. The chronograph watch according to any one of claims 1 to 9, wherein the first mobile (1) and the second mobile (2) have a logarithmic spiral shape.

11. A chronograph watch according to any one of claims 1 to 10, wherein each of the first mobile (1) and the second mobile (2) comprises at least one notch (12', 12"; 22', 22") in order to reduce their imbalance when the indication member (24) is reset to zero.

12. A chronograph according to any one of claims 10 to 11, comprising a heart-shaped piece (3) coaxial with the second mobile (2), and connecting means (33) between the second mobile (2) and the heart-shaped piece (3) allowing them to be fixed together, thus reducing or avoiding any displacement caused during the reset to zero.

13. A chronograph watch according to claim 12, the connection means comprising a pin (33) carried by the heart-shaped piece (3) and arranged to be received by a through hole (21) of the second mobile (2).

14. A chronograph watch according to any one of claims 10 to 13, comprising play limiting means between the first mobile (1) and the second mobile (2), which allows the second mobile (2) to rotate before being driven by the first mobile (1).

15. A chronograph watch according to claim 14, the second mobile (2) comprising play limiting means.

16. A chronograph watch according to claim 15, wherein the play limiting means is a protrusion of an arm (29) of the second mobile (2).

Images