Mechanical movement with information display

Abstract

The present invention relates to a mechanical movement (1''') with an information display device (2'''), comprising at least one indicator member (4) for said information, mounted for rotation about a rotation axis A. The movement (1''') encloses a cavity (8) for receiving at least said indicator member (4), said cavity (8) being arranged so that said indicator member (4) is completely housed inside the movement (1'''). The movement is arranged to rotate coaxially with the rotation axis A and comprises at least one movable body (10) including an outer peripheral toothing (12), said movable body (10) being housed in the cavity (8) and arranged to support said indicator member (4). The movable body (10) includes the outer toothing (12) and comprises a fellow (10a) defining an inner opening (18), the fellow (10a) supporting an arm (10b) passing radially through the inner opening (18) so as to be mounted for rotation about the rotation axis A, and a support member (4) is represented on the arm (10b). The invention also relates to a timepiece equipped with such a mechanical movement (1''').

Description

[Technical Field]

[0001] The present invention relates to a mechanical movement equipped with an information display device, such as time-linked information (e.g. hours), and with at least one indicating member for said information, mounted to rotate about an axis of rotation A.

[0002] The invention also relates to a timepiece equipped with such a mechanical movement. [Background technology]

[0003] Devices for displaying time-linked information, such as the time, and more specifically the current time, have traditionally been of the analog display type. These conventional display devices with pointers use an hour hand and a minute hand, which move by rotating around the same axis relative to a dial with hour and minute scales and cooperate to display the time. A seconds hand can complete the display. The hour and minute hands are essentially perforated at one end, allowing them to be fixed to the hour wheel and cannon pinion pipes located below the dial. The hour and minute hands are thus driven in rotation by the hour wheel and cannon pinion, respectively, via a hand portion passing through the axis of rotation common to both hands. The distal end of each hand constitutes an indicator intended to cooperate with the scale of the dial.

[0004] However, a drawback of such known display devices is that the stacking of the various components and the number of stages required occupy a considerable volume, especially in the direction of the thickness of the movement. For this reason, the volume available inside the case in which the movement is located must be large enough to accommodate the movement, as well as the dial located above the movement and the hands located above the dial. Therefore, this display device with conventional hands cannot be used in ultra-thin mechanical timepieces.

[0005] An ultra-thin display solution is proposed, for example, in Patent Document 1, which uses a display device with a central disc for displaying the hours and an outer ring for displaying the minutes that is concentric with the hour disc. The disc and ring are provided with indices that rotate at an appropriate speed relative to a dial with a scale to display the time. However, this device inevitably results in the minute indices appearing cut out in the middle and hidden by the central disc. Therefore, it is not possible to use a conventional pointer-type display in which two hour and minute hands appear to rotate on the same axis in the center of the display.

[0006] Another solution, involving an ultra-thin device for displaying the current time, is described in Patent Document 2. In this device, the hour wheel has a display intended to cooperate with a first fixed display to display the hours, the minute wheel has a different rotation axis from the hour wheel, and this display has a display intended to cooperate with a second fixed display to display the minutes, and the first and second fixed displays are provided with a frame of the watch movement. Thanks to these features, the minute wheel and the hour wheel directly serve as minute and hour display elements, respectively, while the corresponding scales are directly supported by the frame (e.g., plate) of the watch movement. Therefore, this display device allows for a reduction in both the number of required components and the volume of the display device compared to known display devices. However, here too, a conventional pointer-type display, in which two hour and minute hands in the center of the display rotate around the same axis, cannot be used.

[0007] The solution described in Patent Document 3 is proposed for producing ultra-thin electronic watches. The hour and minute discs are placed on the bottom of the watch, which serves as a plate. These discs are solid, transparent discs, and guide marks are provided on them to serve as the hour and minute hands. To achieve an ultra-thin watch, the watch's thicker elements, such as the motor, quartz, and battery, are placed outside the display disc area, in a housing created between the bottom and the middle bezel of the watch case. However, the arrangement of various components in a mechanical watch is more complex than in an electronic watch. The use of solid discs also has certain drawbacks, particularly inertia. Due to their large mass, a large amount of energy is required to move them. This can make it difficult to ensure that very small gaps between the solid discs are maintained, for example, if the watch is subjected to an unexpected impact. Furthermore, the use of solid discs made of transparent materials has another drawback: the creation of parallax problems that occur when viewing the display at an angle. In fact, overlapping one or more transparent discs with glass can accentuate the parallax effect and distort the accuracy of the reading. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Zuikoku Patent No. 691786 Specification [Patent Document 2] Zuikoku Patent No. 712411 Specification [Patent Document 3] French Patent No. 2 461 292 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention aims to remedy at least some of these drawbacks by proposing an information display device that allows the production of extremely thin mechanical timepiece movements.

[0010] In particular, the invention proposes a device for displaying several pieces of information that can be used in ultra-thin mechanical timepiece movements, while being arranged to indicate the time in the manner of traditional hands. [Means for solving the problem]

[0011] To this end, the present invention relates to a mechanical movement with an indicator device, the indicator device comprising at least one indicator member for said information mounted to rotate about a rotation axis A, the movement enclosing a cavity for receiving at least the first indicator member, the cavity being arranged so that the indicator member is housed completely inside the movement, the movement comprising at least one movable body, the at least one movable body being arranged to rotate coaxially with the rotation axis A and comprising an outer toothing, the movable body being housed in the cavity and arranged to support the indicator member.

[0012] According to the invention, the movable body comprises a fellow including the outer toothing and defining an inner opening, the fellow supporting an arm passing radially through the inner opening so as to be mounted for rotation about the rotation axis A, and a support member being present on the arm.

[0013] Such a construction makes it possible to advantageously eliminate the conventional drive via a pipe passing through the axis of rotation and associated drive gear, which represents a considerable volume, which advantageously makes it possible to save height and reduce the volume of the display device.

[0014] The indicator is therefore completely integrated inside the mechanical movement and does not extend beyond the volume occupied by said movement itself, more particularly in the direction of the thickness of the movement.The use of such a movement therefore makes it possible to produce ultra-thin mechanical watches whose available internal case volume is only slightly larger than the volume occupied by the movement incorporating the display.

[0015] Furthermore, the movable body supporting the pointing member used in the present invention can have a perforated movable body that does not require a lot of energy to operate, and there is no problem of parallax even when several movable bodies of the same type are stacked on top of each other.

[0016] Advantageously, the display device can comprise at least one first indicator member for a first information and a second indicator member for a second information, mounted to rotate about the axis of rotation A and arranged in the cavity, the second indicator member being superimposed on the first indicator member, the cavity being arranged so that the first indicator member and the second indicator member are completely housed inside the movement, the movement being a first mobile body, arranged to rotate coaxially with the axis of rotation A, comprising a first outer peripheral toothing and housed in the cavity. a first movable body arranged to support the first support member; and a second fellow having a second outer peripheral toothing housed within a cavity and arranged to rotate coaxially with a rotation axis A, the second fellow defining a second inner opening through which the first support member can be presented, the second fellow supporting a second arm passing radially through the second opening to be mounted for rotation about the rotation axis A, the second support member being presented on the second arm.

[0017] According to a first embodiment, the first movable body is a solid gear provided with the first outer toothing, on which a first indicator member is represented.

[0018] According to another embodiment, the first movable body comprises a first fellow including the first outer toothing and defining a first inner opening, the first fellow supporting a first arm passing radially through the first opening so as to be mounted for rotation about the rotation axis A, and a first support member being represented on the first arm.

[0019] Advantageously, the display device can comprise at least one third indicator member for third information, arranged within the cavity and superimposed on the second indicator member, said third indicator member mounted for rotation about a rotation axis A, said cavity arranged so that said third indicator member is completely housed within the movement together with the first and second indicator members, the movement comprising a third movable body housed within the cavity and arranged to rotate coaxially with the rotation axis A, and a third fellow, the third fellow including a third outer toothing and defining a third inner opening through which the first and second indicator members can be represented, said third fellow supporting a third arm passing radially through said third opening so as to be mounted for rotation about said rotation axis A, and a third indicator member being represented on said third arm.

[0020] These embodiments are particularly suitable for displaying time, for example, where a first indicator member displays the hours, a second indicator member is superimposed on said first indicator member and displays the minutes, and an optional third indicator member is superimposed on said first and second indicator members and displays the seconds, mounted to rotate about said axis of rotation A, and the cavity is arranged such that said second indicator member and any third indicator member are arranged to be completely housed inside the movement together with the first indicator member.

[0021] In this way, a conventional hand-type current time display device is obtained that is completely integrated into the movement, making it possible to produce ultra-thin watches.

[0022] The invention also relates to a timepiece equipped with a mechanical movement as defined above.

[0023] Other features and advantages of the present invention will become apparent from a reading of the following detailed description of various embodiments of the invention, given by way of non-limiting example, with reference to the accompanying drawings, in which: [Brief explanation of the drawings]

[0024] [Figure 1] 1 is an isometric view of a first embodiment of a movement according to the invention; FIG. [Figure 2] The movement in Figure 1 is shown in cross section. [Figure 3] FIG. 2 is an isometric cutaway view of a second embodiment of a movement according to the present invention. [Figure 4] FIG. 10 is an isometric view of a third embodiment of a movement according to the invention. [Figure 5] The movement in Figure 4 is shown in cross section. [Figure 6] FIG. 5 is a cross-sectional view of the movement of FIG. 4. [Figure 7] Isometric view of the gears and the indicators superimposed on them, aligned in the direction of the thickness of the movement to display 00 hours, 00 minutes, and 00 seconds. [Figure 8] FIG. 1 is an isometric view of gears and superimposed indicator members that are offset from one another to display a current time different from 00:00:00. DETAILED DESCRIPTION OF THE INVENTION

[0025] The present invention relates to a mechanical watch movement equipped with a device for displaying information (especially information related to time, such as seconds, minutes, or hours), which can be used individually or in combination with at least the hours and minutes to indicate the current time. According to the definition in G.-A. Berner's "Professional Illustrated Dictionary of Watchmaking," a watch movement is the mechanical part of a watch that is supported by a frame and includes all the components and mechanisms that function to determine the time (mainly the motor, finishing gear train, escapement, and regulating mechanism). The movement, together with the display device, is intended to be placed in a case called a watch case to form a watch. In this description, movement 1 is considered to occupy the volume symbolically represented in Figures 1-6 by an ultra-thin, sealed cylinder, representing an ultra-thin movement. The various components and mechanisms that make up a mechanical watch movement are known to those skilled in the art and are not shown here.

[0026] 1 and 2, which represent a first embodiment of the invention, the display device 2 comprises at least one first indicator member 4 for first information, such as the hour for displaying the hour, and a second indicator member 6 for second information, such as the minute for displaying the minute, superimposed on the first indicator member 4, i.e., positioned in front of the first indicator member 4 with respect to a user looking at the movement 1. The display device 2 is therefore advantageously a device for displaying the current time HH.MM.

[0027] Each of the indicator members 4, 6 is mounted to rotate about the same axis of rotation A passing through the centre of the display device 2. Each of the indicator members 4, 6 has at one end a hole 7 through which the axis of rotation A passes, and at the other end is represented by a hand with its tip directed towards the outside of the movement 1. The indicator members 4, 6 therefore appear as a pair of hands located at the centre of the display device 2 to indicate the current time in the conventional way.

[0028] The movement 1 here surrounds a cavity 8 which receives the first and second indicator members 4, 6, said cavity being arranged such that said first and second indicator members 4, 6 are entirely housed inside the movement 1. More specifically, the cavity 8 has a particular depth, i.e. a depth in the thickness direction of the movement 1, which is chosen so that the first and second indicator members 4, 6 remain within the volume occupied by the movement 1, regardless of the display position.

[0029] The cavity 8 is open at least on the side of the movement where the display device 2 must be visible to the user. The bottom of the cavity 8 can be closed. In this case, the cavity 8 can be constituted, for example, by a recess in the plate of the movement. In another variant, the cavity 8 can be through-hole, which makes it possible to show the movement below the display device, as in the embodiment shown in Figures 1 and 2. This can be particularly useful when producing skeletonized watches. The through cavity 8 can be formed, for example, by arranging various parts and mechanisms of the movement so as to form the cavity inside the movement.

[0030] The movement 1 can be closed by an open plate at the level of the cavity 8 so as to leave only the indicator members 4, 6 of the display device 2 visible. This plate can be provided with a fixed time display, which, in cooperation with the indicator members 4, 6, displays the hours and minutes in the manner of a watch face. In the case of a skeleton watch, the movement remains open.

[0031] The display device 2 needs to be thin so that it can be completely housed inside the movement 1 .

[0032] For this purpose, at least one of the first and second support members, preferably the first and second support members 4 and 6, is advantageously arranged to be driven in rotation about the rotation axis A through a peripheral zone that does not pass through said rotation axis A. The fact that the support members 4, 6 are driven from the outside advantageously makes it possible to eliminate the different stages imposed by the conventional pipe construction of the hour wheel and pinion and therefore to reduce the overall thickness.

[0033] The movement 1 preferably comprises at least one first lower movable body 10 arranged to rotate coaxially with the rotation axis A and comprising a first outer circumferential toothing 12, said first movable body 10 being housed in the cavity 8 and arranged to support the first indicator member 4. The movement 1 also comprises a second upper movable body 14 arranged to rotate coaxially with the rotation axis A and comprising a second outer circumferential toothing 16, said second movable body 14 being housed in the cavity 8 and arranged to support the second indicator member 6.

[0034] In the embodiment according to the invention represented in Figures 1 and 2, the first mobile body 10 comprises a first fellow 10a, which includes said first peripheral toothing 12 and defines a first circular inner opening 18 centred on the axis of rotation A, through which opening the movement emerges and passes through the cavity 8 (or the bottom of the cavity if the cavity is closed by a bottom).

[0035] The first fellow 10a supports a first arm 10b which passes radially in the direction of the axis of rotation A through a first opening 18 and has at its end a hole 7 which allows said arm 10b to be mounted so as to rotate about the axis of rotation A.

[0036] The arm 10b is preferably integral with the fellow 10a and is flush with said fellow 10a in order to limit the thickness of the first movable body 10.

[0037] The first indicator 4 is represented on the first arm 10b, for example, by representing on the arm 10b, at its distal end opposite the hole 7, a tip directed towards the outside of the movement 1 constituting the tip of the hand, while the base part of the arm 10b constitutes the body of the hand, symbolizing the hour hand. Advantageously, the first indicator 4 represented on the first movable body 10 is obtained by engraving or imprinting on the arm 10b, so that the first indicator 4 is thin in thickness in accordance with said arm 10b.

[0038] Similarly, the second movable body 14 comprises a second fellow 14a, which includes a second outer toothing 16 and defines a second inner opening 20 centered on the rotation axis A, through which the first indicating member 4 can emerge when the first indicating member 4 is staggered relative to the second indicating member 4, and through the cavity 8 as well as the movement. The first and second openings 18, 20 are of substantially the same dimensions.

[0039] The second fellow 14a supports a second arm 14b which passes radially through said second opening 20 in the direction of the axis of rotation A and has a hole 7 at its end, which enables said arm 14b to be mounted for rotation about said axis of rotation A.

[0040] The arm 14b is preferably integral with the fellow 14a and is flush with the fellow 14a in order to limit the thickness of the second movable body 14.

[0041] The fact that the movable bodies 10 and 14 are perforated means that they are light and do not require significant amounts of energy to operate, and also eliminates the parallax problems associated with the use of transparent materials when multiple movable bodies of the same type are stacked on top of each other.

[0042] The second indicator 6 is represented on the second arm 14b, for example at the distal end of the arm 14b opposite the hole 7, by representing on said arm 14b a tip directed towards the outside of the movement 1 that constitutes the tip of the hand, while the proximal part of the arm 14b constitutes the body of the hand, symbolizing the minute hand. Advantageously, the second indicator 6 represented on the second movable body 14 is obtained by engraving or transfer onto the arm 14b, so that the second indicator 6 is thin in thickness in accordance with the arm 14b.

[0043] The second movable body 14 is superimposed on the first movable body 10 so as to be able to rotate freely while leaving the necessary appropriate play between them, in particular between the fellows 10a, 14a on the one hand and the arms 10b, 14b on the other hand.

[0044] Furthermore, the movement 1 comprises drive mechanisms for the first and second movable bodies 10, 14 arranged to cooperate with the first and second outer toothed portions 12, 16 of the first and second movable bodies 10, 14, respectively.

[0045] Such a drive mechanism comprises in particular a gear train with outer toothing 12, 16 arranged to be kinematically connected to the gear train in order to drive the first and second movable bodies 10, 14 at an angular speed appropriate for the corresponding support members 4, 6 and further to guide the first and second movable bodies 10, 14 centrally.

[0046] The cavity 8 has a determined depth so that the first and second superimposed indicator members 4, 6 and their respective superimposed movable bodies 10, 14 are completely housed inside the movement 1 regardless of the display position.

[0047] Another embodiment is depicted in FIG. 3, in which the display device 2''' comprises a single indicator member 4. Elements identical to those in the first embodiment of FIGS. 1 and 2 are again referred to by the same reference numerals. Such an indicator member 4 is, for example, a chronograph hand.

[0048] The indicator member 4 is mounted to rotate about a rotation axis A passing through the center of the display device 2'''. As mentioned above, the indicator member 4 is represented by a hand having at one end a hole 7 through which the rotation axis A passes and at the other end a tip directed towards the outside of the movement 1'''. The movement 1''' surrounds a cavity 8 that receives the indicator member 4, and the cavity 8 is arranged so that the indicator member 4 is completely housed inside the movement 1'''.

[0049] The movement 1''' comprises a movable body 10, which is arranged to rotate coaxially with the rotation axis A and has an outer peripheral toothing 12, and which is housed within the cavity 8 and arranged to support the indicator member 4.

[0050] According to the invention, the mobile body 10 comprises a fellow 10a, which includes said outer toothing 12 and defines an internal opening 18, said fellow 10a supporting an arm 10b passing radially through said internal opening 18 so as to be mounted for rotation about said axis of rotation A, a support member 4 being represented on said arm 10b. Advantageously, the support member 4 represented on the mobile body 10 is obtained by engraving or imprinting on said arm 10b, so that the support member 4 is of reduced thickness in conformity with said arm 10b.

[0051] Such a perforated mobile body 10 is lightweight and does not require a significant amount of energy to operate, and does not suffer from the parallax problems associated with the use of transparent materials.

[0052] As described above, the movable body 10 is provided with a drive mechanism arranged to cooperate with the outer teeth 12 of the movable body 10 to drive the movable body 10 from the outside at an appropriate angular velocity relative to the support member 4 and further guide the movable body 10 to the center.

[0053] Another embodiment is represented in Figures 4 to 8, in which the display device 2' comprises a first indicator member 4' for first information, such as hours, a second indicator member 6 for second information, such as minutes, and a third indicator member 30 for third information, such as seconds. Elements identical to those in the embodiment of Figures 1 to 3 are again referred to by the same reference numerals. Advantageously, the display device 2' is therefore also a device for displaying the time HH, MM, SS.

[0054] The third indicator member 30 for displaying the seconds is here superimposed on the second indicator member 6 for the minutes, i.e., positioned in front of the second indicator member 6 with respect to a user looking at the movement 1'. All indicator members 4', 6, 30 are mounted to rotate about the same axis of rotation A passing through the center of the display device 2'. Each indicator member 4', 6, 30 is represented by a hand having at one end a hole 7', 7 through which the axis of rotation A passes and at the other end a tip directed towards the outside of the movement 1'. The indicator members 4', 6, 30 therefore appear as a set of hands positioned in the center of the display device 2' to indicate the current time and seconds in the conventional manner.

[0055] In this embodiment, the first lower movable body 10' is a solid gear with a first outer peripheral toothing 12, and has a hole 7' through its center, through which the rotation axis A passes. The solid gear of the first movable body 10' therefore constitutes the dial bottom of the display device 2'. The cavity 8 can be closed or open by the bottom, and the bottom of the display device 2' is constituted by the solid gear of the first movable body 10'.

[0056] More specifically, as shown in Figures 7 and 8, the first hour indicator 4' is represented directly on the solid gear of the first mobile body 10' so that the first time indicator 4' and the bottom of the display device 2' coincide and the thickness is reduced. The first indicator 4' is represented in the form of an hour hand, the tip of which is directed towards the outside of the movement and the body of which is arranged radially in the direction of the rotation axis A which runs through the bore 7'. Advantageously, the first indicator 4' represented on the first mobile body 10' is obtained by engraving or transferring directly onto the solid gear of the first mobile body 10'.

[0057] The second supporting member 6 for the division is here in the intermediate position and is identical to that of the first embodiment, with a mobile body 14 with a fellow 14a and an arm 14b, and with an outer toothing 16. The solid gear of the first mobile body 10' with the first supporting member 4' emerges through an inner opening 20.

[0058] As shown in FIG. 8, the portion of arm 14b between the junction with fellow 14a and the tip of second indicator member 6 can be thinned to better highlight said indicator member 6.

[0059] A third indicator member 30 is disposed within the cavity 8, superimposed on the second indicator member 6 and mounted for rotation about a rotation axis A. The cavity 8 is arranged so that the third indicator member 30 is entirely housed within the movement 1′ together with the first and second indicator members 4′, 6, as shown in FIG.

[0060] The third support member 30 is arranged to be driven in rotation about the axis of rotation A via a peripheral zone that does not pass through the axis of rotation A.

[0061] For this purpose, the movement 1' comprises a third upper movable body 32, which is arranged to rotate coaxially with the rotation axis A and which comprises a third outer peripheral toothing 34, said third movable body 32 being housed in the cavity 8 and arranged to support the third indicator member 30.

[0062] The third movable body 32 comprises a third ferrule 32a, which comprises a third outer toothing 34 and defines a third inner opening 36 centered on the rotation axis A, through which the first and second support members 4', 6 can be presented when staggered with respect to the third support member 30 and the solid gear of the first movable body 10'. The second and third openings 20, 36 are of substantially the same dimensions.

[0063] The third fellow 32a supports a third arm 32b which passes radially in the direction of the axis of rotation A through a third opening 36 and has at its end a hole 7 which enables said arm 32b to be mounted for rotation about said axis of rotation A.

[0064] In order to limit the thickness of the third movable body 32, the arm 32b is preferably integral with the fellow 32a and is on the same plane as the fellow 32a.

[0065] The third indicator 30 is represented on the third arm 32b, for example at the distal end of the arm 32b opposite the hole 7, by representing the tip of said arm 32b directed towards the outside of the movement 1′, so that the tip of the hand and the base end of the arm 32b constituting the body of the hand are configured to represent a seconds hand. Advantageously, the third indicator 30 represented on the third movable body 32 is obtained by engraving or printing on the arm 32b, so that the third indicator 30 has a reduced thickness in line with that of said arm 32b.

[0066] The third movable body 32 is superposed on the second movable body 14 so as to be able to rotate freely with the second movable body 14, more specifically, between the fellows 14a, 32a on the one hand, and between the arms 14b, 32b on the other hand, leaving appropriate play as required. Similarly, the second movable body 14 is superposed on the first movable body 10' so as to be able to rotate freely with the first movable body 10', more specifically, between the fellow 14a with the arm 14b and the solid gear, leaving appropriate play as required.

[0067] Furthermore, the movement 1 ′ comprises a drive mechanism for the third movable body 32 configured to cooperate with the third outer peripheral toothing 34 of the third movable body 32 .

[0068] Such a drive mechanism in particular drives the third movable body 32 from the outside with respect to the support member 30 at a suitable angular velocity, and further comprises a gear train arranged to kinematically connect the outer toothing 34 to the finishing gear train so that the third movable body 32 is guided centrally.

[0069] The cavity 8 has a depth determined so that the first, second and third superimposed indicating members 4', 6, 30 and their respective superimposed movable bodies 10', 14, 32 are completely housed inside the movement 1' regardless of the display position.

[0070] It is clear that according to a non-illustrated variant of the second embodiment, the first hour indicator member can be supported by a first movable body identical to that of the first embodiment, having a fellow, an arm on which said first hour indicator member is represented, and an inner opening through which the movement emerges.

[0071] The movement of the present invention allows for the production of ultra-thin, conventional, pointer-type time display devices, thanks to the elimination of various steps imposed by, for example, the use of a conventional pipe structure with an hour wheel and cannon pinion, various mobile bodies supporting centrally guided, externally driven indicators, and at least one or two upper mobile bodies consisting of an open, ultra-thin, needle-shaped disk that exposes a lower mobile body supporting a first hour indicator. The use of these two or three ultra-thin mobile bodies further reduces the thickness of the display device, allowing it to be fully integrated into the movement, resulting in an ultra-thin watch with conventional hands. Furthermore, the fact that the mobile bodies used are advantageously perforated means that they are light and do not require significant amounts of energy to operate. The parallax problem associated with the use of transparent materials also does not arise when multiple mobile bodies of the same type are stacked on top of each other.

[0072] It is clear that the movement of the invention may comprise other indicator members which are not entirely housed inside said movement.

Claims

1. A mechanical movement (1, 1', 1''') equipped with an information display device (2, 2', 2'''), said information display device (2, 2', 2''') comprises at least one indicating member (4, 6, 30) for said information, mounted to rotate about a rotation axis A; said movement (1, 1', 1''') encloses a cavity (8) for receiving at least said indicator member (4, 6, 30); the cavity (8) is arranged so that the indicator (4, 6, 30) is completely housed inside the movement (1, 1', 1'''); the movement is arranged to rotate coaxially with the rotation axis A and includes at least one movable body (10, 14, 32) including an outer peripheral toothed portion (12, 16, 34); The mechanical movement (1, 1', 1''') is arranged such that the movable body (10, 14, 32) is accommodated in the cavity (8) and supports the indicator member (4, 6, 30), the movable body (10, 14, 32) includes the outer circumferential toothing (12, 16, 34) and has a fellow (10a, 14a, 32a) defining an inner opening (18, 20, 36); the fellow (10a, 14a, 32a) supports an arm (10b, 14b, 32b) that passes radially through the inner opening (18, 20, 36) so as to be mounted for rotation about the rotation axis A; A mechanical movement (1, 1', 1'''), characterized in that said indicator (4, 6, 30) is represented on said arm (10b, 14b, 32b).

2. 2. A movement (1, 1', 1''') according to claim 1, characterized in that it is closed by an open plate at the level of said cavity (8).

3. Movement (1, 1', 1''') according to claim 1 or 2, characterized in that the cavity (8) is through-hole.

4. A movement (1, 1', 1''') according to any one of claims 1 to 3, characterized in that it comprises a drive mechanism for the movable body (10, 14, 32) arranged to cooperate with the outer toothing (12, 16, 34) of the movable body (10, 14, 32).

5. The display device (2, 2') is mounted to rotate about the axis of rotation A and comprises at least one first indicator (4, 4') for a first indicia and a second indicator (6) for a second indicia, the first indicator (4, 4') being arranged in the cavity (8); The second indicator (6) is superimposed on the first indicator (4), the cavity (8) is arranged so that the first indicator member (4, 4') and the second indicator member (6) are completely housed inside the movement (1, 1'); The movement is a first movable body (10, 10') arranged to rotate coaxially with the rotation axis A, having a first outer peripheral toothing (12), housed in a cavity (8), and arranged to support the first support member (4, 4'); a second movable body (14) including a second fellow (14a) having a second outer peripheral toothing (16) housed within the cavity (8) and arranged to rotate coaxially with the rotation axis A, the second fellow (14a) defining a second inner opening (20) through which the first index member (4, 4') can be presented, the second fellow (14a) supporting a second arm (14b) passing radially through the second inner opening (20) to be mounted for rotation about the rotation axis A, the second index member (6) being presented on the second arm (14b); A movement (1, 1') according to any one of claims 1 to 4, comprising:

6. 6. A movement (1') according to claim 5, characterized in that the first mobile body (10') is a solid gear with the first peripheral toothing (12) on which the first indicator member (4') is represented.

7. 6. A movement (1, 1''') according to claim 5, characterized in that the first mobile body (10) comprises a first fellow (10a) including the first outer peripheral toothing (12) and defining a first inner opening (18), the first fellow (10a) supporting a first arm (10b) passing radially through the first inner opening (18) so as to be mounted for rotation about the rotation axis A, and the first support member (4) being represented on the first arm (10b).

8. The movement (1, 1') according to any one of claims 5 to 7, characterized in that the second movable body (14) is superimposed on the first movable body (10, 10') so as to leave an appropriate amount of play between the first movable body (10, 10') and the second movable body (14) so ​​as to allow free rotation.

9. A movement (1, 1') according to any one of claims 5 to 8, characterized in that it comprises a drive mechanism for the first and second movable bodies (10, 10', 14) configured to cooperate with the first and second outer toothings (12, 16) of the first and second movable bodies (10, 10', 14), respectively.

10. The display device (2') comprises at least one third indicator (30) for third information, which is disposed in the cavity (8) and superimposed on the second indicator (6); The third support member (30) is mounted to rotate about the rotation axis A, the cavity (8) is arranged so that the third indicator member (30) is completely housed inside the movement (1) together with the first and second indicator members (4', 6); the movement comprises a third mobile body (32) housed in the cavity (8), the third mobile body (32) being arranged to rotate coaxially with the axis of rotation A and comprising a third fellow (32a) including a third outer toothing (34), the third fellow (32a) defining a third inner opening (36) through which the first and second indicator members (4', 6) can appear; the third fellow (32a) supports a third arm (32b) that passes radially through the third inner opening (36) so as to be mounted for rotation about the rotation axis A; Movement (1') according to any one of claims 5 to 9, characterized in that said third indicating member (30) is represented on said third arm (32b).

11. The movement (1') according to claim 10, characterized in that the third movable body (32) is superimposed on the second movable body (14) so ​​as to leave a moderate amount of play between them so as to be able to rotate freely.

12. A movement (1') according to claim 10 or 11, characterized in that it comprises a drive mechanism for the third movable body (32) configured to cooperate with the third outer toothing (34) of the third movable body (32).

13. A movement (1, 1') as described in claim 5, 7 or 10, characterized in that at least two of the first inner opening (18), second inner opening (20) and third inner opening (36) of the first fellow (10a), second fellow (14a) and third fellow (32a) are each approximately the same dimensions.

14. A movement (1, 1', 1''') as described in claim 5, 7 or 10, characterized in that the first arm (10b), the second arm (14b) and the third arm (32b) are each integral and are on the same plane as the first fellow (10a), the second fellow (14a) and the third fellow (32a), respectively.

15. A movement (1') according to any one of claims 10 to 14, characterized in that the cavity (8) has a depth determined so that the first, second and third superimposed indicator members (4', 6, 30) and their respective mobile bodies (10', 14, 32) are completely housed inside the movement (1').

16. A movement (1') according to any one of claims 10 to 15, characterized in that the display device displays the time, the first information indicated by the first indicator member (4') being hours, the second information indicated by the second indicator member (6) being minutes, and the third information indicated by the third indicator member (30) being seconds.

17. A movement (1, 1', 1''') according to any one of claims 1 to 16, characterized in that the indicator member (4, 4', 6, 30) is represented by a hand whose tip is directed towards the outside of the movement (1, 1', 1''').

18. A movement (1, 1', 1''') according to any one of claims 1 to 17, characterized in that the indicators (4, 4', 6, 30) represented on the respective moving bodies (10, 10', 14, 32) are obtained by engraving or transfer.

19. A timepiece comprising a mechanical movement (1, 1', 1''') according to any one of claims 1 to 18.

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