EP1325390A1

EP1325390A1 - Display device for watches

Info

Publication number: EP1325390A1
Application number: EP01986775A
Authority: EP
Inventors: Walter Haselberger
Original assignee: Cartier International BV
Current assignee: Cartier Creation Studio SA
Priority date: 2000-10-12
Filing date: 2001-10-11
Publication date: 2003-07-09
Also published as: JP2004511787A; US20040027926A1; US6842404B2; WO2002031603A1; DE10050557C1

Abstract

The invention relates to a display device for watches, comprising a watchface. Said watchface is provided with a day hours display window (243) for respectively displaying one of the hours of the day during the day, and a separate night hours display window (245) for respectively displaying one of the hours of the night during the night. The inventive display device for watches comprises a day hours disc (239) provided with twelve hour numbers, and a night hours disc (241) provided with twelve hour numbers. The two hour display windows (243, 245) and the two hour discs (239, 241) are arranged in such a way that the hour numbers of the day hours disc (239) are only visible in the day hours display window (243), and the hour numbers of the night hours disc (241) are only visible in the night hours display window (245). By using two separate hour discs (239, 241) and two separate hour display windows (243, 245) for displaying the day hours and for displaying the night hours, hour number representations can be larger than when using a single hour display window and a single 24 hour disc. Furthermore, only the hour numbers 1 to 12 are required for each hour disc when using two separate hour discs (239, 241) and two separate hour display windows (243, 245). The number of two-digit figures requiring a relatively large amount of space is greatly reduced, and hour numbers 20 to 24 beginning with the number 2 and especially taking up a lot of space are not required.

Description

Watches display

The invention relates to a watch display device, for example for wristwatches or pocket watches.

There are wristwatches with a 24-hour display, the dial of which is provided with an hour display window, in which one of 24 hour numbers is visible for one hour, which is located on an hour disc located below the dial and rotatable relative to the hour display window. Since on the hour disc 24

Hour numbers have to be accommodated, the number of hours 20 to 24 taking up a lot of space due to their 2 at the beginning, especially for wristwatches smaller

Outside dimensions, the display window and the visible one

The number of hours may be relatively small, making it difficult to read.

Representations of such a wristwatch are contained in the following journals: Uhrenmagazin 7/8 96, June 26, 1996, p. 39;

Wristwatches 2 96, June 5, 96; and Chronos 4 96; June 21, 96.

There are also wristwatches with two semicircular arches arranged on a dial concentrically and at a radial distance from each other, each with twelve hour numbers, one of the two semicircular arches showing 12 hours of the day and the other semicircular arc of 12 hours at night. These two semicircular arches are assigned a two-armed hour hand that rotates once every 24 hours, the axis of rotation of which is concentric with the two semicircular arches and the two arms of which are different

Have length such that during half of a 24 hour period the longer pointer arm on the number of hours of the outer of the two semicircular arches and one during the other half

24-hour period the shorter pointer arm points to the number of hours on the inside of the two semicircular arches. The two semicircular arcs occupy a considerable part of the surface of the dial, which may be undesirable for design reasons or for clocks on whose dial, in addition to different time displays, such as hour, minute and second displays, also other display types, such as date and / or moon phase display should be. Representations of such a wristwatch are contained in ARMBNANDUHREN 3/97, page 42, and in Uhren Magazin 4/96, page 105.

Such disadvantages are to be overcome with the present invention. In particular, an ulcer display device is also intended

24-hour display can be made available, which allows easy reading of the respective hour with limited space on the dial surface.

This is achieved with a device according to the invention

A watch display device which has a dial provided with a day hour display window for displaying one of the day hours during the day time and a separate night hour display window for displaying one of the night hours during the night time, and one with twelve

Hourly numbered daytime disc, which can be rotated every hour in such a way that during the daytime hours one of the daily hourly numbers is visible for one hour and one with twelve hourly numbers Night hour disc, which can be rotated further every hour, so that during the night hours one of the night hour numbers is visible for one hour in the night hours window, the two hour discs overlap at most partially and the two hour display windows and the two hour discs are arranged in such a way that the hour numbers of the The day hour disc is only visible in the day hour display window and the hourly number of the night hour disc is only visible in the night hour display window.

By using two separate hour discs and two separate hour display windows for daytime and nighttime display, on the one hand, larger hourly numbers are possible than when using a single hour display window and a single 24-hour disc. On the other hand, two separate hour discs and two separate hour display windows for each hour disc with the hour numbers 1 to 12 are sufficient. You therefore only need to accommodate a maximum of three two-digit numbers per hour disc, which can be reduced to two two-digit numbers if you use the Roman notation X for the number 10. And these two-digit numbers have all of them as the first digit

1, for the representation of which significantly less space is required than for the representation of the number 2. The hourly numbers 20 to 24 beginning with the number 2, which take up a particularly large amount of space, are not required.

In addition to the completely new visual appearance on the dial, the use of two hour display windows also gives an advantage when reading the hour numbers. When using a single hour display window and a single hourly disc, you would have to the hour disc next to nine single-digit numbers, fifteen double-digit numbers. The one-digit, and therefore easier to read, hour numbers disadvantageously fall into the night, a period in which one usually sleeps. The double-digit numbers begin at 10 a.m. and do not end until midnight. A clock display device according to the invention with two hour display windows and two hour discs has only six double numbers in 24 hours and, when using a ten in Roman representation "X", even only four double-digit hour numbers, namely twice 11 and twice 12.

The change between the hour display with the day hour disc and the hour display with the night hour display preferably takes place at 8 a.m. and 8 p.m., but can also take place, for example, at 6 a.m. and 6 p.m.

The readability of the hour display is further improved in one embodiment of the invention, in which each of the two hour discs each has an open area which is not provided with hour numbers, the open area during the night hours

The hourly disc is visible in the daytime hourly window and during the daytime the free area of the nighttime hourly disc is visible in the nighttime hourly window.

The two hour discs can each be formed by a circular disc, that is, a full-surface circle, or by an annular disc. One of the two hour discs can also be formed by a circular disc and the other hour disc by an annular disc. In one embodiment of the invention, the hour discs have disc axes with a mutual spacing such that the hour discs do not overlap. In another embodiment of the invention, the hour discs have disc axes with a mutual spacing such that the hour discs partially overlap.

In one embodiment of the invention, the two hour discs are designed for a toothed drive, and at least one drive device in the form of a drive gear is provided for driving the two hour discs, which is provided with thirteen teeth, of which twelve teeth for the hourly feeding of the respective number of hours to the respective hour disc and the thirteenth tooth is provided for feeding the free area of the respective hour disc into the field of view of the associated hour display window.

In one embodiment of the invention, at least one minute display device and / or one second display device is arranged outside the two hour display windows.

In a particularly preferred embodiment of the invention, the watch display device is designed as a display module which can be coupled to a clockwork in terms of drive. Such a display module is manufactured as a separate unit and on the clockwork or on

Clockwork driven gear module of the clock to be provided with a display device according to the invention, with drive coupling of the drive device for the two hour indicators with, for example, a drive shaft or a drive pinion of the clockwork or the transmission module. The clockwork can be a purely mechanical clockwork or an electromotive clockwork.

In one embodiment of the invention, the display module is designed such that the two hour display windows are in the 10 am and 2 am positions. By rotating the display module by 90 °, the two hour display windows can also be installed in the 7 and 11 o'clock positions. A decentralized minute display can be provided.

A display device according to the invention is particularly suitable for wristwatches and pocket watches.

The invention will now be explained in more detail by means of embodiments. The drawings show:

Figure 1 is a plan view of a wristwatch designed according to the invention during the daytime display.

2 shows a plan view of a wristwatch designed according to the invention during the night hour display;

3 shows a schematic plan view of a transmission module which can be used together with a display module designed according to the invention;

4 shows a schematic plan view of a display module designed in accordance with the invention with non-overlapping hour discs with the hour discs removed and the dial removed;

5 shows a schematic plan view of a display module according to the invention with hour discs and dial in an embodiment with non-overlapping hour discs in a first positioning of the hour display window and the hour discs;

FIG. 6 shows the display module shown in FIG. 5 in a second positioning of the hour display window and the hour discs; 7 shows a schematic plan view of an hourly disc of a display module designed according to the invention;

FIGS. 8 and 9 show the display module according to FIG. 6, that is to say with hourglasses which do not overlap, with entirely visible ones

Hour discs during the day hour display or during the night hour display;

FIGS. 10 and 11 the display module shown in FIGS. 8 and 9 without the entire hour discs being made visible; and

Figures 12 to 15 representations corresponding to Figures 8 to 11, but for an embodiment with partially overlapping hour discs.

1 to 7 show embodiments of components of a wristwatch which has a watch display device of the type according to the invention designed as a display module with two non-overlapping hour discs. Such a wristwatch comprises a watch case in which three assemblies or modules are arranged one above the other: at the bottom a clockwork module, above it a transmission module and above this an inventive display module, whereby a dial can be designed as part of the display module or as a separate component placed on the display module. The

Clockwork module comprises a purely mechanical clockwork with a drive spring and a balance or an electromotive clockwork with a battery-operated electric stepping motor of a conventional type. The gearbox module comprises a gearbox which is coupled to an output shaft of the clockwork module and the rotation of the output shaft in different rotary movements, such as on the one hand for a minute display and on the other hand for an hour display. The display module takes over these two rotary movements for driving a minute display or for driving the two hour discs.

FIGS. 1 and 2 show an embodiment of a wristwatch 101 with a display module according to the invention, each in a top view of a dial, FIG. 1 showing the clock during the hour of the day and FIG. 2 showing the clock during the

Night hour display shows.

This wristwatch 101 does not include a watch case 103 with two diametrically arranged lugs 105 for attachment to one shown watch band. On the circumference of the watch case 103 there is a crown 107, by means of which watch settings can be made and, in the case of a purely mechanical clockwork, whose watch spring can be wound.

A dial 109 of the wristwatch 101 is provided in angular positions, which correspond to the positions of the hour numbers 10 and 2 in a watch with an hour hand, with a day hour display window 111 and a night hour display window 113, respectively. To indicate which of the two hour display windows shows the day hours and which of the two hour display windows shows the night hours, the day hour display window 111 is surrounded by the representation of a sun 115 and the night hour display window by the representation of a moon 117 and stars 119. In the angular positions, which correspond to the hour numbers 6 and 12 in a clock with an hour hand, there is a minute display 121 or an image field 123 with a logo 125 and a clock designation 127, for example "Jour et Nuit" as an indication of different day and night Hour display, arranged.

This is during the daytime hour display shown in FIG. 1

Night hour display window 113 is closed, whereas the day hour display window 111 is closed during the night hour display shown in FIG. 2.

FIG. 3 shows a schematic plan view of an embodiment of a transmission module 201 known per se, which in the case of a finished watch is placed on a clockwork module (not shown in the drawings) and is drivingly coupled to it. The transmission module 201 includes a mute gear 203, an hour gear 205 and a transmission gear 207 meshing with the minute gear 203. The teeth of the three gear wheels 203, 205 and 207 are not shown in detail but are each indicated by a circumferential circle. The number of teeth of each of the gears is indicated by a number written in the respective gear. Accordingly, in the illustrated embodiment, the minute gear 203 has 60 teeth, the hour gear 205 has 24 teeth and the outer ring gear of the transmission gear 207, which meshes with the teeth of the minute gear 203, has 120 teeth. Above the transmission gear 207 and concentrically therewith is an indexing gear 209 which meshes with the hourly gear 205 with two diametrically opposed indexing teeth 211 which, when the indexing gear 209 rotates, come into driving engagement with the hourly gear 205.

The hour gear 205 is held between its times by which it is rotated by the teeth 211 of the indexing wheel 209 by means of a pivoting locking finger 213 in its respective rotational position. The locking finger 213 is biased towards the hour gear 205 by means of a biasing spring, not shown, and has a locking tooth 215 which interacts with the teeth of the hour gear 205.

The indexing wheel 209 is assigned an energy storage spring, not shown, which is wound up by the rotation of the transmission gear 207 and continues to rotate the indexing wheel 209 when relaxing. Between the minute gear 203 and the indexing wheel 209 there is a locking lever 217, which can be pivoted about a pivot axis 219, by means of a biasing spring (not shown) Minute gear 203 is biased toward and one end of a control cam (not shown) arranged on the minute gear 203, having a control projection and other end has a locking stop 221. The locking stop 221 is in locking engagement with one of the two indexing teeth 211 for the majority of a revolution of the minute gear 205 and is briefly disengaged from the indexing teeth 211 during each revolution of the minute gear 205 by means of the control projection of the control cam. At this point, the indexing wheel rotates 180 ° under the drive of the energy storage spring, namely until it is prevented from further rotation by the locking lever 217, which has now been pivoted back.

FIG. 4 shows an embodiment of a display module 223 according to the invention without hour discs and dial in a schematic plan view. The position of an annular minute display scale 225 on the dial, not shown, is indicated by dashed lines. A minute hand 227 cooperating with the minute scale 225 is placed on a minute hand shaft 229, the minute hand 227 actually only after

Attaching the dial is connected to the minute hand shaft 229. The minute hand shaft 229 is drivingly connected to the minute gear 203 of the gear module 201 shown in FIG. 3, preferably to a drive shaft (not shown) located in the center of the minute gear 203. To couple the

Minute hand shaft 229 with the latter drive shaft is to be brought into a position rotated counterclockwise by 90 ° in relation to the illustration in FIG. 4. In the center of the display module there is a coupling gear 231, which is drivingly coupled to the hour gear 205 of the transmission module 201 and is provided with teeth only on part of its circumference, specifically with 13 teeth. The direction of rotation of the coupling gear 231 is indicated by an arrow D. On both diametrically opposite sides of the coupling gear 231 there is an end plate gear 233 with 13 teeth each. Each of the two hour disc gears 223 is assigned a pawl 235 biased toward the respective hour disc gear, by means of which the associated hour disc gear 233 is held in its respective rotational position after a respective turning step.

The gear wheels 231 and 233 are arranged in a recess 224 in a housing surface 226 of the display module 223.

The coupling gear 231 is only covered on one circumferential half with teeth, because it should alternately drive only one or only the other of the two inner disk gearwheels 223, depending on whether it is just daytime hours with the daytime hour disk or nighttime hours with the

Night hour disc should be displayed. That is, the teeth of the coupling gear 231 are only in engagement with one of the two hour disk gears 223.

The coupling gear 231 has 13 teeth because each hour disk 13

Display positions has: 12 display positions for each of 12 hour numbers and a display position that is designed as an open space and appears in the associated hour display window when the other hour disc shows hours. FIGS. 5 and 6 each show an embodiment of a display module according to the invention provided with hour disks and a dial in a schematic plan view. The only difference between the two embodiments is the different angular positions of the two hour discs, the two hour display windows and the minute display.

For the embodiment shown in FIG. 5, the gear module 201 is to be arranged rotated by 90 ° clockwise relative to the angular position shown in FIG. 3 in the watch case 103 so that the

Minute hand shaft 229 is in a suitable orientation to the minute gear 203 or to the drive shaft located in its center.

The display module 223 shown in FIG. 5 comprises a dial 237 on which the minute display scale 225 is located, which cooperates with the minute hand 227 located above the dial 237.

Beneath the dial 237 there are a daytime hour disc 239 and a nighttime hour disc 241, which are each coupled to one of the two hourly disc gearwheels 233 shown in FIG. 4. A day hour display window 243 is assigned to the day hour disk 239, and a to the night hour disk 241

Night hour display window 245 is assigned.

In the embodiment shown in Fig. 5, the two hour discs 239 and 241 are in those angular positions of the

Dial 237, which corresponds to the hour positions at 12 o'clock or 6 o'clock on a clock with an hour hand. In the embodiment shown in FIG. 6, the two hour discs 239 and 241 are in the hour positions 9:00 and 3:00, respectively. The The minute display is in the embodiment shown in FIG. 5 in the hour position at 9 o'clock and in the embodiment according to FIG. 6 in the hour position at 6 o'clock.

An hour disc suitable for the embodiment according to FIG. 6

245 is shown in plan view in FIG. 7. It bears the hourly numbers 1 to 12 evenly spaced around its circumference, with an open space 247 left between the hourly numbers 7 and 8, which is located in the associated hourly display window when the current hours are displayed with the other hourly disc.

An hour disc, which is suitable for the embodiment according to FIG. 5, differs from the hour disc 245 shown in FIG. 7 in that the individual hour numbers are not applied in a radially standing manner but rather lying perpendicular to the radial direction.

FIGS. 8 to 11 show the embodiment of a display module 223 shown in FIG. 6 with hourglasses 239, 241 that do not overlap, and FIGS. 12 to 15 show an embodiment of a display module 249 with hourglasses that partially overlap

239, 241. FIGS. 8, 9, 12 and 13 show the hour discs 239, 241 for clarification, as if they were completely visible, while FIGS. 10, 11, 14 and 15 in reality correspond to the hour discs 239, 241 only in each case show the visible part in the corresponding hour display window of the dial 237. 8, 10, 12 and 14 show the state during the daytime display and in FIGS. 9, 11, 13 and 15 the state during the nighttime display. As a comparison of FIGS. 8 to 15 shows, one can with hourly discs overlapping achieve larger representations of the hour numbers, but at the expense of a greater axial height of the watch, since the two hour disks 239, 241 must be arranged at an axial distance from one another, while the non-overlapping hour disks 239, 242 can be arranged in the same axial plane of the watch.

Finally, the functioning of a clock designed according to the invention will be briefly explained.

The driving force from the clockwork is introduced into the shaft of the minute wheel 203 of the transmission module 201. From there, the driving force is transmitted to the minute gear 203, which in turn drives the transmission gear 207. The energy storage spring seated on the transmission gear 207 stores the driving force for one hour. Then the locking lever 217 opens according to the

Minutenzalmrad 203 associated control curve and allows the indexing wheel 209 to rotate by 180 °, whereby the hour gear 205 is rotated an hour position in which it is then held by means of the pawl 213 for one hour. As a result of this rotary movement of the hour gear 205, the coupling gear 231 of the display module 223 is rotated further by one hour position, which leads to a corresponding further rotation of the daytime disk 239 and the night hour disk 241. The coupling gearwheel 231 moves the hourly disk 239 or 241 performing the hour display relative to the associated hourly display window 243 or 245 every hour with twelve of its teeth from hour to hour and then brings the free area 247 of this hour disk 239 or 241 with the thirteenth tooth into the associated one Hour display window 243 or 245. Then the teeth of the coupling gear 231 disengaged from the teeth of the dial plate gear 233 of this hour plate 239 or 241 and come into engagement with the teeth of the dial plate gear 233 of the other hour plate 241 or 239.

Claims

claims

1. A clock display device comprising: a dial (109) which is provided with a day hour display window (111; 243) for displaying one of the day hours during the day time and a separate night hour display window (113; 245) for displaying one of the night hours during the night time , a day hour disk (239) provided with twelve hour numbers, which can be rotated further in hourly intervals such that during the day hours in the daytime window (111; 243) one of the day hour numbers is visible for one hour, and a night hour disk (241) provided with twelve hour numbers, which can be rotated every hour in such a way that during the night hours one of the night hour numbers is visible for one hour in the night hours window (113; 245), the two hour discs (239; 241) overlapping at most partially and the two hour display windows (111, 113; 243; 245) and the two hour discs (239, 241) de are arranged in such a way that the hourly numbers of the daily hour disc (239) only appear in the daily hour display window (111; 243) and the hourly numbers of the night hour disc (241) are only visible in the night hour display window (113; 245).

2. Watch display device according to claim 1, wherein each of the two hour discs (239, 241) each has a non-hourly free area (247), during the night hours the free area (247) of the day hour disc (239) is visible in the day hour display window (111; 243) and during the day the free area (247) of the night hour disc (241) is visible in the night hour display window (113; 245).

3. Watch display device according to claim 1 or 2, wherein at least one of the two hour discs (239, 241) is formed by a full-surface circular disc.

4. Watch display device according to claim 1 or 2, wherein at least one of the two hour discs is formed by an annular disc.

5. Watch display device according to one of claims 1 to 4, wherein the two hour discs (239, 241) have disc axes with such a mutual distance that the hour discs (239, 241) do not overlap.

6. Clock display device according to one of claims 1 to 4, wherein the two hour discs (239, 241) have disc axes with such a mutual distance that the hour discs (239, 241) partially overlap.

7. Watch display device according to one of claims 1 to 6, wherein the two hour discs (239, 241) are designed for a toothed drive and for driving the two hour discs (239, 241) at least one drive gear (231, 233) is provided, which with thirteen teeth is provided, of which twelve teeth for the hourly feeding of the respective number of hours and the thirteenth Tooth is provided for feeding the respective free area (247) into the field of view of the associated hour display window (111, 113; 243, 245).

8. Watch display device according to one of claims 1 to 7, wherein outside of the two hour display windows (111, 113; 243, 245) at least one minute display device (225, 227, 229) and / or a second display device is arranged.

9. Watch display device according to one of claims 1 to 8, which as

Display module (223) is formed, which can be coupled in terms of drive to a transmission module (201).

10. Wristwatch with a display device according to one of claims 1 to 9.

11. Pocket watch with a display device according to one of claims 1 to 9.