EP0947894B1 - Setting device for timepiece - Google Patents

Abstract

Indication adjusting system for watch has correction unit so that 12 hour indication is manually adjustable relative to the second 24 hour indication. The second hour indication is a 24 hour indication and is rotationally drivable in a direct drive line from the basic mechanism of the watch with a revolution per 24 hours, and from a gear of the direct drive line, driven with a revolution per 12 hours across a positively locked connection. A 12 hour drive line is rotationally drivable, for the operation of the 12 hour indicator. So that using a manually operable adjusting element, separately from each other. Either the direct drive line or with the overcoming of the positively locked connection, the 12 hour drive line is adjusted relative to the direct drive line.

Description

The invention relates to display device for a clock, in particular a wristwatch, with a 12-hour display, rotatable driven by a base with two revolutions per 24 hours, the hours are displayed, with a second hour display, which is also rotatably driven by the base and with a correction device, by means of which the 12-hour display is manually adjustable relative to the second hour display.

In such display devices, it is known to use the two hour displays to display time in different time zones. Both hours are 12 hour displays.

From the Swiss Auslegeschrift CH 674 116 is also known that the second hour display is a 24-hour display and is rotatably drivable in a direct gear train from the base of the clock with one revolution per 24 hours and that of a driven with one revolution per 12 hours wheel the direct gear train via a positive connection, a 12-hour transmission train for driving the 12-hour display is rotatably driven, wherein by means of a manually operable actuator separately from each other either the direct gear train or overcoming the frictional connection of the non-positive connection of the 12-hour gear train relative to the direct gear train is adjustable. In an implicitly proposed embodiment of this document, in particular, the 24-hour display is to be used as a permanent, normally non-adjustable display, while the 12-hour display can be adapted to change time zones without affecting the 24-hour display. In case of a correction or a basic setting of the 24-hour display, however, a stop of the base unit and a synchronous adjustment of the 24-hour display and the 12-hour display occur.

The object of the invention is to provide a display device of this kind, which makes it possible to adjust either the 12-hour display separately or the 12-hour display with the second hour display together, the adjustment should take place in a way possible, space-saving and reliable manner ,

This object is achieved in that the frictional connection between the direct gear train and the 12-hour transmission line has a lever spring on a wheel of the 12-hour transmission line, said lever spring is coupled to a wheel of the direct gear train.

Of particular advantage is such a display device in pilot's watches, since in the aviation sector worldwide the so-called. UTC Universal Time Coordinated applies as a unit time, which is measured in 24 hours. The 24-hour display can therefore be set permanently, while the 12-hour display is used to quickly set the valid local time or the change of winter and summer time without the minutes display and possibly a second display are pressed. But must be e.g. after a standstill of the clock again set a time, this is done together for both hours by adjusting the 24-hour display.

For quick adjustability of the 12-hour display, the manually operable adjusting device can have a manually rotatably driven correction drive, through which a two-revolutions per 24 hours rotatably driven hour indicator wheel of the 12-hour transmission train is adjustable.

An advantageous embodiment of the frictional connection is that the hour indicator wheel concentrically surrounds a driven with one revolution per 12 hours star of the direct gear train and is connected to this force-fit.

In order to achieve an adjustment of the 12-hour display with certain periods of time, the hour indicator wheel can be turned on by one to the axis of rotation of the hour indicator wheel and star parallel pivot axis be arranged pivotable hour catch having a ratchet tooth obtuse angle at a distance from the pivot axis, which engages under spring bias in a tooth gap of the star.

It is advantageous if the star is a star with twelve teeth, since then always an exact adjustment is done by exactly one hour.

Is from a minute wheel of the base a change gear rotatably driven, which is rotatably connected concentrically with a pinion through which a star driving the hour of the direct drive train with one revolution per 12 hours rotatably driven, so does not occur in the basic setting of the 24-hour display only the setting of the hours but also the minutes. For this purpose, the change gear can be rotatably driven by a manually rotatably driven pointer actuating wheel of the manually operable actuating device in a simple manner.

In order to be able to adjust both the 24-hour display and the 12-hour display with a common adjusting device, the pointer adjusting wheel between an engagement position in the change gear and an engagement position in the correction drive can be adjusted.

If the pointer adjusting wheel between the engagement position in the change gear and the engagement position in the correction drive can be adjusted to a neutral position, an unintentional adjustment of one of the hour indications is avoided.

For ease of operation, the pointer wheel can be rotatably driven by a crown.

If in this case the crown can be set axially in two setting positions, wherein in the first setting position the pointer setting wheel engages in the correction drive and in the second setting position in the change wheel, then the crown serves as common actuator for both hour displays, wherein preferably the crown is still in a third axial position Stellposition is adjustable, in which the pointer wheel is disengaged from both the corrective drive and the change gear to avoid accidental adjustment.

The crown can thereby fulfill a third actuating function, that the third axial parking position of the crown is an elevator position for mounting the spring mechanism of the clock. As a result, only a single actuator is required for three different functions.

In principle, a 24-hour hand can be driven over the 24-hour scale from the direct gear train.

If the direct drive train has a 24-hour indicator wheel driven by the hour wheel through one or more intermediate wheels with one revolution per 24 hours and carrying a 24-hour indicator of the 24-hour display, then the 24-hour display, designed as an hourly disk, can largely turn on be placed anywhere on the dial of the clock.

A particularly small size of the clock is achieved in that the 24-hour disc is arranged coaxially to the 12-hour display.

For this purpose, preferably, the 24-hour disk and the 24-hour indicator wheel have a concentric opening, through which protrudes an hour hand carrying hour tube of the 12-hour display.

If a date display can be driven by the hour display wheel via a third gear train, it changes over twelve o'clock every second pass of the 12-hour hand. The date is therefore always displayed correctly in relation to the 12-hour display. If an adjustment of the 12-hour display is made midway forward or backward, the date also changes forward or backward according to the position of the 12-hour display. If the date has to be corrected after thirty days, the 12-hour hand with the crown will be pre-turned two full turns. Accordingly, he must be pre-rotated by six turns on March 1st become.

In a simple embodiment, the date display may include a date ring positioned on a sprocket, the date display bearing digits, the sprocket being indexed by the third gear train one step ahead, and rotated 360 degrees after thirty one steps.

If the third gear train has a Maltese cross drive that generates the steps of progression, only small forces are required to carry out the step-by-step. Thus, there is no danger that due to a large Verstellwiderstandes the continuation of the date, the non-positive connection of the 12-hour transmission line to the direct gear train is overcome and an unintentional time adjustment.

In simple, only low Fortschaltkräfte training required, the toothed ring of a Daterad be driven driveable, which is rotatably connected coaxially with a Maltese cross, the Maltese cross by a shift finger of a rotatably driven Dateschaltrades is weiterschaltbar.

Preferably, the date shift wheel is one revolution per 24 hours from the drive of a Datumredradungsrades rotatably driven, which is in engagement with the hour indicator wheel, wherein the Maltese cross with a fifth turn per progressing step can be switched.

To achieve a small size of the clock, the toothed ring is preferably an internal toothed ring, which may be coaxial with the 12-hour display and / or the 24-hour display.

Figur 1

eine Ansicht einer Uhr

Figur 2

eine Ansicht der Anzeigestellvorrichtung der Uhr nach Figur 1

Figur 3

eine Ansicht der Anzeigestellvorrichtung nach Figur 2 im Bereich eines Stundenstems und einer Stundenraste

Figur 4a

eine Ansicht der Anzeigestellvorrichtung nach Figur 2 im Bereich eines Zeigerstellrads in Neutralstellung

Figur 4b

die Anzeigestellvorrichtung nach Figur 4 a in Korrektur- stellung der 12-Stundenanzeige

Figur 4c

die Anzeigestellvorrichtung nach Figur 4 a in Korrekturstellung der Gesamtanzeigevorrichtung

Figuren 5a und 5b

eine perspektivische Explosionsdarstellung von 24-Stunscheibe und Datumsring der Anzeigestellvorrichtung nach Figur 2

Figur 6

eine schematische Seitenansicht des direkten Getriebestrangs der Anzeigestellvorrichtung nach Figur 2 in der Seitenansicht

Figur 7

eine schematische Draufsicht des direkten Getriebestrangs nach Figur 6

Figur 8

eine ausschnittsweise Ansicht eines Datumrades mit Malteserkreuz der Anzeigestellvorrichtung nach Figur 2

Figur 9

eine ausschnittsweise Ansicht eines Rades mit Schaltfinger und des Malteserkreuzes der Anzeigestellvorrichtung nach Figur 2.

An embodiment of the invention is illustrated in the drawing and will be described below. Show it

FIG. 1

a view of a clock

FIG. 2

a view of the display device of the clock of Figure 1

FIG. 3

a view of the display device of Figure 2 in the area of a Stundenstems and an hour catch

FIG. 4a

a view of the display device according to Figure 2 in the region of a pointer wheel in neutral position

FIG. 4b

the display device according to FIG. 4 a in correction position of the 12-hour display

Figure 4c

the display device according to Figure 4 a in correction position of the overall display device

FIGS. 5a and 5b

an exploded perspective view of 24-Stunscheibe and date ring of the display device of Figure 2

FIG. 6

a schematic side view of the direct gear train of the display device device of Figure 2 in side view

FIG. 7

a schematic plan view of the direct gear train of Figure 6

FIG. 8

a fragmentary view of a date wheel with Maltese cross of the display device of Figure 2

FIG. 9

a fragmentary view of a wheel with shift finger and the Maltese cross of the display device according to FIG. 2.

The clock shown in Figure 1 has on a dial 5 an annular 12-hour scale 1 a 12-hour display, which is covered by a 12-hour hand 2, a minute hand 3 and a second hand 4.

In the area of the twelve o'clock position, a window 6 designed as a ring section is recessed in the dial 5, through which a 24-hour display 24-hour display rotatably drivable behind the dial 5 is visible. By means of a mark 8 of the dial 5, the time can be read on the 24-hour disk 7.

In the area of the three o'clock position, a second window 9 is recessed in the dial 5, through which a date ring 33 arranged rotatably drivable behind the dial 5 can be seen.

FIG. 2 shows a view of the display device of the clock. The drive of the clock is based on a non-illustrated minute wheel of a base, through which a change gear 10 is rotatably driven. The change gear 10 is concentrically fixedly connected to a pinion 11 which rotatably drives an hour wheel 12 arranged concentrically with the axis of rotation of the 12-hour hand 2 with one revolution per twelve hours.

As can be seen both in FIG. 2 and in FIGS. 6 and 7, a first 24-hour intermediate wheel is rotatably driven by the hour wheel 12 via a first intermediate gear 13 and a pinion gear 14 fixed against rotation, which is non-rotatably connected to a second 24-hour intermediate wheel 16 connected is.

This second 24-hour intermediate wheel 16 in turn drives a 24-hour indicator wheel 17 at one revolution per twenty-four hours, on which the 24-hour disk 7 is fixed.

Of the. Drive of the 24-hour indicator wheel 17 from the not shown minutes wheel of the base unit forth, forms a non-interruptible, direct gear train.

As Figure 5a shows, the 24-hour disc 7 is evenly distributed on a circle with the numbers 1 to 24, which are then seen through the window 6 of the dial 5 as a 24-hour display.

The hour wheel 12 carries fixedly connected to him concentric a hour star 18 with twelve teeth.

Concentrically enclosed is the hour star 18 of a ansich freely rotatably mounted hour indicator wheel 19, on which an hour catch 20 to a to the axis of rotation of the Stundenstems 18 parallel pivot axis 21 is pivotable.

At the end remote from the pivot axis 21, the hour catch 20 has a ratchet plan 22 of obtuse angle, which is drawn by the bias of an acting on the hour catch 20 tension spring 23 in a tooth gap of the hour star 18 and so a non-positive connection of the hour system 18 with the hour indicator wheel 19th manufactures. .

Thus, the hour indicator wheel 19 is driven by the hour wheel 12 with one revolution per twelve hours from the base unit.

Since the 12-hour hand 2 is arranged on the hour tube 24 of the hour indicator wheel 19, this moves with one revolution per twelve hours and forms, with the 12-hour scale 1, a 12-hour indication which passes through the 12th hour 12 leading from the hour wheel 12 to the hour tube 24 -Hours gear train is drivable.

From the hour indicator wheel 19, a third gear train is assumed which has a date reduction wheel 25 engaged in the hour indicator wheel 19, the drive 26 of which is fixedly mounted thereon driving a date shift wheel 27 at one revolution per twenty-four hours.

With the Dateschaltrad 27 a radially directed shift finger 28 is fixedly connected, through which, as Figure 9 shows in more detail, a Maltese cross 29 with five indexing grooves 30 is progressively.

With the Maltese cross 29 a ten-tooth Datumrad 31 is firmly connected, which engages the teeth of a concentric with the hour tube 24 rotatably arranged, designed as an inner toothed ring gear ring 32 having sixty-two teeth and a date ring 33 carries.

As shown in FIG. 5b, the numbers 1 to 31, which can be seen through the window 9 in the dial 5, are arranged uniformly distributed on the date ring 33. By the advancement of the Maltese cross 29 by a step advancing every twenty four hours also every twenty four hours further rotation of the date wheel 31 and the ring gear 32 by two teeth, so that every twenty four hours, a progression of the date to be seen in the window 9 number occurs.

FIGS. 4a, 4b and 4c show a crown 34 that can be set in three axial setting positions, by means of which a dial setting wheel 35 can be driven in rotation.

In the position shown in Figure 4a, which is an elevator setting position, the pointer wheel 35 engages in a drive of a spring mechanism, not shown the clock on, so that by means of the crown 34, the spring mechanism of the clock can be raised.

In the middle setting position illustrated in FIG. 4b, the pointer setting wheel 35 engages in a correction drive 36, which in turn engages with the hour indicator wheel 19. By turning the crown 34 thus the hour indicator wheel 19 is rotatably driven.

Since this is positively connected to the hour star 18 over the hour detent, but this connected via pinion 14, 12 hour wheel and change gear 10 to the base and is prevented from twisting this, the hour indicator wheel 19 turns overcoming the frictional connection of the locking tooth 22 in Hour Star 18 relative to the hour star 18. The ratchet teeth 22 slides like a ramp out of a tooth gap of the hour star 18 and snapped into the adjacent tooth gap under the bias of the tension spring 23. This is an adjustment of the 12-hour hand 2 of the 12-hour display by exactly one hour.

However, this adjustment also takes place on the third gear train, which leads to the toothed ring 32, so that the adjustment of the date display is compliant with the adjustment of the 12-hour display.
The adjustment can be done both forward and backward.

In Figure 4c, the crown 34 is shown in its fully extended position. The hand wheel 35 engages in the change gear 10. If now the crown 34 is rotated, the minute wheel of the base unit is rotated both via the change gear 10 and thus the minute hand 3 is adjusted and the hour wheel 12 is rotated via the pinion 11.

Through the hour wheel at the same time via the direct gear train an adjustment of the 24-hour disc of the 24-hour display, 12-hour gear train an adjustment 12-hour hand 2 of the 12-hour display and the third gear train an adjustment of the date ring of the date display.

Claims (24)

1. A display setting arrangement for a timepiece, in particular a wristwatch, having a 12-hour display (1,2), on which, driven in a rotatable manner by a basic mechanism with two revolutions every 24 hours, hours can be displayed, having a second hour display (7,8) which can be driven in a rotatable manner likewise by the basic mechanism, and having a correction device (34,35,36), by which the 12-hour display (1,2) can be adjusted manually relative to the second hour display (7,8) wherein the second hour display (7,8) is a 24-hour display and can be driven in a rotatable manner, through a direct gear train (12,13,14,15,16,17), by the basic mechanism of the timepiece with one revolution every 24-hours, and wherein, via a force-fit connection (18,20,21,22,23), a 12-hour gear train (19) is drivable in a rotatable manner, for purpose of driving the 12-hour display (1,2) by a direct-gear-train wheel (12) which is driven with one revolution every 12-hours, wherein by means of a setting device which is manually actuatable (34), it is possible to adjust, separately from one another, either the direct gear train (12, 13, 14, 15, 16, 17) or, by overcoming the force fit of the force-fit connection (18,20,21,22,23) the 12-hour gear train (19) relative to the direct gear train and in which the force-fit connection between the direct gear train and the 12-hour gear train comprises a spring ratchet (20,21,22,23) acting on a wheel (19) of the 12-hour gear train which is coupled with a wheel (12) of the direct gear train.
2. The display setting arrangement as claimed in claim 1, wherein the setting device, which is manually actuatable (34), has a correction drive mechanism (36) which is drivable in a manually rotatable manner and by means of which it is possible to adjust an hour display wheel (19) of the 12-hour gear train, said wheel being driven in rotation with two revolutions every 24 hours.
3. The display setting arrangement as claimed in claim 2, wherein said hour display wheel (19) concentrically encloses a direct-gear-train star (18), which is driven with one revolution every 12 hours, and is connected thereto with spring ratchet (20,21,22,23).
4. The display setting arrangement as claimed in claim 3, wherein arranged on the hour display wheel (19) is an hour ratchet (20,21,22,23) which is pivotable about a pivot spindle (21), parallel to the axis of rotation of the hour display wheel (19) and star, and, at a distance from the pivot spindle (21), has an obtuse-angled engaging tooth (22) which engages, with spring prestressing, in a tooth gap of the star.
5. The display setting arrangement as claimed in claims 3 to 4, wherein the star is an hour star (18) with twelve teeth.
6. The display setting arrangement as claimed in one of the preceeding claims, wherein a minute wheel of the basic mechanism can drive in a rotatable manner a change wheel (10) which is concentrically connected in a rotationally fixed manner to a pinion (11), by which a star-driving hour wheel (12) of a direct drive train is drivable in a rotatable manner with one revolution every 12 hours.
7. The display setting arrangement as claimed in claim 6, wherein the change wheel (10) is drivable in a rotatable manner by a hand setting wheel (35) which is drivable in a manually rotatable manner and belongs to the setting device, which is manually actuatable.
8. The display setting arrangement as claimed in claim 7, wherein the hand setting wheel (35) is adjustable between a position in which it engages in the change wheel (10) and a position in which it engages in a correction drive mechanism (36).
9. The display setting arrangement as claimed in claim 8, wherein the hand setting wheel (35) is settable in a neutral position, between the position in which it engages in the change wheel (10) and the position in which it engages in the correction drive mechanism (36).
10. The display setting arrangement as claimed in claims 7 to 9, further comprising a winder, and wherein the hand setting wheel (35) is drivable in a rotatable manner by said winder (34).
11. The display setting arrangement as claimed in claim 10, wherein the winder (34) is settable axially in two setting positions, wherein in a first setting position the hand setting wheel (35) engages in the correction drive mechanism (36) and in a second setting position it engages in the change wheel (10).
12. The display setting arrangement as claimed in claim 11, wherein the winder (34) is settable in a third axial setting position, in which the hand setting wheel (35) is disengaged both from the correction drive mechanism (36) and from the change wheel (10).
13. The display setting arrangement as claimed in claim 12, wherein the third axial setting position of said winder (34) is a winding position for winding a spring mechanism of the timepiece.
14. The display setting arrangement as claimed in one of the preceeding claims, wherein a direct drive train has a 24-hour display wheel (17) which is driven by the hour wheel (12), via at least one intermediate wheels (13-16), with one revolution every 24 hours and bears a 24-hour disk (7) of the 24-hour display.
15. The display setting arrangement as claimed in claim 14, wherein said 24-hour disk (7) is arranged coaxially with respect to the 12-hour display.
16. The display setting arrangement as claimed in claim 15, wherein said 24-hour disk (7) and the 24-hour display wheel (17) have a concentric opening through which there projects an hour stem (24) of the 12-hour display, said stem bearing an hour hand (2).
17. The display setting arrangement as claimed in one of claims 2 to 16, wherein a date display (9,33) is drivable by an hour display wheel (19), via a third gear train (25,26,27,28,29,30,31,32).
18. The display setting arrangement as claimed in claim 17, wherein the date display has a date ring (33) which is arranged on a toothed ring (32) and bears the characters of the date display, wherein the toothed ring (32) is advancable step by step by means of the third gear train, and following thirty-one advancement steps has been rotated through 360°.
19. The display setting arrangement as claimed in claim 18, wherein said third gear train has a Maltese-cross drive mechanism which produces the advancement steps.
20. The display setting arrangement as claimed in claim 19, wherein the toothed ring (32) is drivable such that it can be advanced by a date wheel (31) which is coaxially connected in a rotationally fixed manner to a Maltese-cross (29), wherein the Maltese-cross (29) is advancable by a switching finger (28) of a date switching wheel (27) which is drivable in a rotatable manner.
21. The display setting arrangement as claimed in claim 20, wherein the date switching wheel (27) is drivable in a rotatable manner, with one revolution every 24 hours, by the drive mechanism (26) of a date reduction wheel (25) which is in engagement with the hour display wheel (19).
22. The display setting arrangement as claimed in claims 20 and 21, wherein the Maltese-cross (29) is advancable by a fifth of a revolution per advancement step.
23. The display setting arrangement as claimed in claims 18 to 22, wherein the toothed ring (32) is an internal toothed ring.
24. The display setting arrangement as claimed in claims 18 to 23, wherein the toothed ring (32) is coaxial with respect to the 12-hour display and/or the 24-hour display.

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