EP1924894B1 - Wristwatch - Google Patents

Abstract

The invention relates to a wrist watch (10) with an analogue time display which may be rotated about a central axis and a rotating rim (14) mounted concentrically to the central axis on the housing (11) for setting a time zone different to the local time zone. A simplified setting may be achieved by a stepped adjustment of the rotating rim (14) optionally clockwise or anti-clockwise by means of a button (16) arranged on the housing (11).

Description

TECHNICAL AREA

The present invention relates to the field of wristwatches. It relates to a wristwatch according to the preamble of claim 1.

STATE OF THE ART

From the prior art ( DE-A1-197 16 693 respectively. CH-A5-690 205 ) is a world clock known, which has a world time mechanism, in the local Fig. 4 is illustrated. This mechanism has a disc carrier (8) which is screwed onto three guide tubes (9, 13) pressed into the work plate. The disc carrier (8) leads the city disc (1), which is firmly connected to the Städtestern (10). A corrector (11) whose fulcrum is at A is actuated by a pusher (12) located at 2 o'clock. The corrector (11) is returned by a return spring (14) in its rest position on the guide tube (13). A locking pin (15) pressed into the corrector (11) cooperates at a higher level with the internal toothing of the city test (10) of (24) teeth. Thus, when the corrector (11) is actuated by the pusher (12), the city disc performs a twenty-fourth turn counterclockwise at each pressure. The disadvantage of this solution is that only in one direction a correction is possible, and that it is complicated in construction and installation.

CH 266 412 opens a world time clock with a turnable in two directions pushers.

PRESENTATION OF THE INVENTION

It is an object of the invention to provide a wristwatch with an adjustable time zone display, which can be easily integrated into existing watches and can be adjusted or adjusted by a quick and easy-to-use mechanism.

The object is solved by the entirety of the features of claim 1. The essence of the invention is to provide a turntable rotatably mounted in the housing concentric to the central axis for setting the deviating from the local time zone time zone, which is selectively adjustable by means of a housing arranged on the pusher clockwise and counterclockwise stepwise. By adjusting the turntable with only one pusher in both directions of rotation can be achieved both when exceeding the time zone limits in west as well as in east direction fast adjustment. In addition, the only pusher saves space and is very easy to use.

The pusher can be actuated along a radially oriented pusher axis, wherein the pusher drives the turntable via a gearbox integrated into the housing.

The transmission has two partial transmissions, which are mirror images of a passing through the pusher axis center plane and communicate with the turntable, and that the pusher for adjusting the turntable depending on the selected direction of rotation can be brought into engagement with one of the partial transmission.

The turntable preferably has on a visible from the outside scale surface on a 24h division; and the pusher moves the turntable in one or the other direction of rotation in 15 ° increments.

A preferred development is characterized in that the pusher for selecting the engagement in one of the partial transmissions is rotatable about the pusher axis, wherein the pusher can assume a first rotational position, in which he is in engagement with the one partial transmission, and occupy a second rotational position can, in which it is in engagement with the other partial transmission that the pusher between the first rotational position and the second rotational position can assume a neutral third rotational position in which it is disengaged from both partial transmissions, and in that the pusher in the rotational positions each latching is held.

Another embodiment of the invention is characterized in that each of the sub-gear has a gear designed as a ratchet wheel, in which the pusher in the first or second rotational position when pressing with a shift finger engages in a tangential direction, and that the shift finger on the pusher spring back to the pusher axis is stored.

In particular, the teeth of the ratchet wheel from the radial direction are formed obliquely, and the shift finger on its back on a chamfer, so that when pressing the pusher of the shift finger with its wedge-shaped tip behind the teeth of the ratchet engages while releasing the Pusher of the shift finger with the chamfer springs in and thus evasive sliding over the teeth of the ratchet wheel.

Operation is further facilitated when markings are made to visualize the particular rotational position of the pusher on the pusher.

Another embodiment is characterized in that each of the partial transmissions has a plurality of shafts with a pinion gear and pinions seated on the shafts, that the pinions are mounted on each of the shafts by frictional engagement, and that the pinions on each shaft to prevent slippage are additionally positively connected to the pinion, wherein for the production of the positive connection between the pinion and the pinion of a shaft of the pinion in the axial direction extending pin, with which it engages in a corresponding radial groove in the pinion.

A further embodiment of the invention is characterized in that each of the partial transmission has securing means which prevent rotation of the partial transmission with the pusher not actuated, wherein the securing means comprise a pinion rotating with the partial transmission, in whose tooth spaces a tangential spring leaf with one at the free end arranged latching crest engages latching. The pinion is preferably arranged together with the ratchet wheel on a common shaft.

Another embodiment provides that the turntable between the housing and a screwed onto the top of the housing glass holder is mounted, and that the turntable on the bottom has a ring gear, with each of which an output-side pinion meshes in each of the partial transmission. On the underside of the turntable, an annular detent contour is formed with a 15 ° pitch, and the detent contour opposite locking means are provided in the housing or in the transmission, which cause a locking of the turntable in 15 ° increments. The catch contour has periodic depressions with oblique flanks whose vertices are each 15 ° apart; the locking means comprise balls mounted in the housing or in the transmission, which are pressed by means of compression springs against the locking contour.

BRIEF EXPLANATION OF THE FIGURES

Fig. 1

in einer perspektivischen Explosionsdarstellung wesentliche Elemente einer Armbanduhr gemäss einem bevorzugten Ausführungsbeispiel der Erfindung, wobei Uhrwerk, Abdeckglas und Gehäuseboden der Übersichtlichkeit halber weggelassen sind;

Fig. 2

in einer perspektivischen Explosionsdarstellung den inneren Aufbau des aus zwei spiegelsymmetrischen Teilgetrieben bestehenden Getriebes aus Fig. 1;

Fig. 3-5

in verschiedenen Ansichten die zusätzliche formschlüssige Verbindung zweier auf einer gemeinsamen Welle sitzenden Ritzel eines Teilgetriebes aus Fig. 2;

Fig. 6

den Schnitt durch den Drücker gemäss Fig. 1 zur Betätigung des Drehkranzes;

Fig. 7

den Drücker aus Fig. 6 in der Seitenansicht;

Fig. 8

den Drücker aus Fig. 6 in einer perspektivischen Explosionsdarstellung;

Fig. 9-10

verschiedene Ansichten der Lagerhülse des Drückers aus Fig. 6 mit den auf der Unterseite angebrachten Rastvertiefungen zur Festlegung der Drehpositionen;

Fig. 11-14

verschiedene Situationen beim Zusammenwirken von Drücker und Getriebe gemäss Fig. 2 und 6;

Fig. 15-16

verschiedene Ansichten des Drehkranzes mit seiner unterseitigen Rastkontur;

Fig. 17

in einer Seitenansicht ein vergrösserter Ausschnitt des Drehkranzes mit der Rastkontur und dem Zahnkranz; und

Fig. 18

in der Draufsicht von oben das Gehäuse aus Fig. 1 mit der Ausfräsung zur Aufnahme des Getriebes und den Bohrungen für die Rastmittel des Drehkranzes.

The invention will be explained in more detail with reference to embodiments in conjunction with the drawings. Show it

Fig. 1

in a perspective exploded view of essential elements of a wristwatch according to a preferred embodiment of the invention, wherein movement, cover glass and caseback are omitted for clarity;

Fig. 2

in a perspective exploded view of the internal structure of the existing two mirror-symmetric part transmissions transmission Fig. 1 ;

Fig. 3-5

in different views, the additional positive connection of two sitting on a common shaft pinion of a partial transmission Fig. 2 ;

Fig. 6

the section through the pusher according Fig. 1 for actuating the turntable;

Fig. 7

the pusher off Fig. 6 in the side view;

Fig. 8

the pusher off Fig. 6 in a perspective exploded view;

Fig. 9-10

different views of the bearing sleeve of the pusher Fig. 6 with the locking recesses mounted on the underside for determining the rotational positions;

Fig. 11-14

different situations in the interaction of pusher and gear according Fig. 2 and 6 ;

Fig. 15-16

different views of the turntable with its bottom detent contour;

Fig. 17

in a side view an enlarged section of the turntable with the locking contour and the sprocket; and

Fig. 18

in the plan view from above the housing Fig. 1 with the cutout for receiving the gear and the holes for the locking means of the turntable.

WAYS FOR CARRYING OUT THE INVENTION

In Fig. 1 are shown in a perspective exploded view of essential elements of a wristwatch according to a preferred embodiment of the invention. The analog wristwatch 10, which is shown without the actual movement, the glass for covering the dial with the hands rotating about a central axis, and without the case back, comprises a housing 11, a glass holder 12 screwed to the top of the housing 11 Mounting ring 13 for inserting the movement, a rotatably mounted between the housing 11 and the glass holder 12 slewing ring 14, and a pusher 16 which is operatively connected through an opening in the housing 11 with a gear 15, which the turntable 14 gradually about the central axis of the Clock moves. The stroke of the pusher 16 is thereby converted by the transmission 15 in a rotational movement. The in FIGS. 15 and 16 Turntable 14 shown in detail has on the top of an externally visible annular scale surface 51, which is provided with a 24h division. The transmission 15 is designed so that per pressure actuation of the pusher Turntable moved by 15 ° and so in connection with a world time hand, not shown, causes a handover by a time zone. Pusher 16 and gear 15, which will be described in more detail below, are designed so that the rotation of the turntable in 15 ° steps can be done either clockwise and counterclockwise, so that depending on the direction in which the time zones are changed ( west or east), the appropriate adjustment can be made in a simple manner.

Also in Fig. 1 to recognize 5 balls 17 and associated springs 18, in cooperation with a special embodiment of the turntable 14 (locking contour 52 in Fig. 15 and 17 ) ensure that the turntable 14 not only stops in the predetermined 15 ° positions, but also - if, for example, the pusher 16 is not completely depressed - moves automatically to this position.

In order to enable the single pusher 16 optionally a stepwise movement of the turntable 14 in both directions of rotation, the transmission 15 has two partial transmissions 15 a, b, which are mirror images of a through the pusher axis 59 (FIGS. Fig. 6 ) are formed extending central plane and communicate with the turntable 14 by tooth engagement. The pusher 16 can be brought to adjust the turntable 14 depending on the selected direction of rotation with one of the partial gear 15a, b in engagement (see Fig. 11 ). The pusher 16 is rotatable about the pusher axis 59, it can assume a first rotational position in which it is in engagement with the one partial transmission 15a ( Fig. 11-13 ), and assume a second rotational position in which it engages with the other partial transmission 15b.

The transmission 15 with the two partial transmissions 15a and 15b is arranged between two parallel bridges 19 and 20, which have the shape of circular ring sections and are exactly joined together by means of screws 30 and guide pins 31. Per sub-gear 15a, b are three parallel juxtaposed shafts with pinion 21 and 22, 24 and 26th intended. On each of the shafts 21, 22, 24, 26, a pinion 23, 25 and 27 is arranged. Since considerable forces act on the transmission 15 through the pusher 16, and the pinions 23, 25 and 27 are fastened on the shafts 21, 22, 24 and 26 only by frictional engagement, the pinion of a shaft with the respective toothed drive additionally becomes positively positive coupled, as in Fig. 3-5 for the shaft 21 and the pinion 23 is shown.

The toothed drive of the shaft 21 comprises a ratchet wheel 56 with asymmetrical teeth 57, which play a decisive role in cooperation with the pusher 16. To produce the positive connection between the pinion 23 and the toothed drive of the shaft 21, the pinion according to 3 and 4 a plurality of axially extending pin 33, with which it engages in a corresponding radial groove 32 in the pinion 23. As a result, a slip-free coupling between pinion and pinion is guaranteed, which is maintained even at high forces. This additional Formschiuss two located on a shaft gears or pinion can be used with advantage in other cases, where a slip between the gears must be safely avoided when high forces occur.

The structure of the pusher 16, the Fig. 6-8 The pusher, which has a stroke of approximately 1 mm, 16 comprises a bearing sleeve 34, with which it is inserted into the housing 11. In the bearing sleeve 34, a bolt 36 is slidably mounted in the direction of the pusher axis 59 and sealed with a seal 43 in the form of an O-ring. Bolt 36 and bearing sleeve 34 engage at the upper end of the bearing sleeve 34 in such a way that the stroke of the bolt 36 is limited in the direction of the pusher axis 59. At the upper end of the bearing sleeve 34, a crown 35 is rotatably mounted about the pusher axis 59, which is rotatably connected to the bolt 36. In the upper end of the bolt 36, a pusher head 37 is screwed with a threaded piece, which serves as an actuating element for the pusher 16. The pusher head 37 is held by means of a spacer sleeve 41 at a distance from the bolt 36. One between pusher head 37 and crown 35th arranged compression spring 42 biases the pusher head 37 and thus also the bolt 36 against the pressing direction.

With its lower end, the bolt 36 protrudes downwards out of the bearing sleeve 34. In the protruding part of the bolt 36, a laterally projecting shift finger 38 is arranged transversely displaceable in a transverse bore and can be pressed inwards against the pressure of a compression spring 40. The hole is closed with a locking screw 39. The shift finger 38, which has a chamfer on the top of the protruding part, comes - when the pusher is in the correct rotational position - when pressing the pusher 16 with the teeth 57 of the ratchet wheel 56 (FIG. Fig. 3, 5 ) and rotates the ratchet 56 by a certain angle further. This movement is transmitted via the respective partial transmission 15a, b on the turntable 14 and causes a further rotation of the turntable 14 in 15 ° increments.

The pusher 16 is - as already mentioned - for selecting the engagement in one of the partial transmission 15a, b with its shift finger 38 rotatable about the pusher axis 59, wherein the pusher 16 can assume a first rotational position in which it engages with the one partial transmission 15a stands ( Fig. 11-13 ), and assume a second rotational position in which it engages with the other partial transmission 15b. Between the first rotational position and the second rotational position, the pusher 16 can assume a neutral third rotational position ( Fig. 14 ), in which he is with both partial transmissions 15a, b out of engagement. The pusher 16 is held latching in each of the rotational positions removed by 90 °. This is according to FIGS. 9 and 10 the bearing sleeve 34 is provided on its underside with an over 180 ° extending sliding surface 46, in each of which offset by 90 ° radially oriented locking recesses 47, 48 and 49 are embedded. In the bolt 36 of the pusher 16, a cylindrical pin 44 is inserted transversely to the pusher axis 59. If the pusher 16 is in an intermediate position, the pin 44 slides without much resistance on the sliding surface 46 of the bearing sleeve 34. On the other hand, if the pusher 16 rotates in one of the three excellent rotational positions, the pin will snap into the respective latching recess 47 due to the pressure of the compression spring 42 , 48 or 49 and fixes the pusher 16 in this rotational position. For the three excellent rotational positions markings 45 are attached to the crown, from which the respective position of the pusher 16 is easily visible. It should be expressly pointed out that a switchable pusher of the type described here can not only be used in the case explained here, but can also be used in other cases in watchmaking, if a compact and simple multi-function operation is required.

In the Fig. 11-13 It is shown how when pressing the pusher 16 of the shift finger 38 of the pusher engages with its wedge-shaped tip behind the teeth 57 of the ratchet wheel 56 and accelerates the transmission when pressed ( Fig. 11 -> Fig. 12 ), while releasing and spring-springing back of the pusher 16 of the shift finger 38 with the chamfer 60 einfedernd on the teeth 57 of the ratchet 56 ( Fig. 13 ). This is facilitated by the fact that the teeth 57 of the ratchet wheel 56 are formed obliquely (asymmetrically) out of the radial direction, and that the shift finger 38 has the chamfer 60 on its rear side. In the in Fig. 14 shown neutral position of the pusher 16 with the two partial transmissions 15a, b out of engagement.

According to Fig. 2 and Fig. 11-14 has each of the partial transmissions 15a, b additional securing means which prevent rotation of the partial transmission 15a, b with the pusher 16 is not actuated and at the same time ensure the assumption of a predetermined position regardless of the stroke of the pusher 16. These securing means each comprise a pinion 23 which rotates with the partial gear 15a, b and in whose tooth spaces a tangentially lying spring leaf 28, which is screwed to the lower bridge 20 by means of screws 29, engages with a catch tip 58 arranged at the free end.

The mounted between the housing 11 and the glass holder 12 slewing ring 14 has on the underside a sprocket 53, with each of which an output-side pinion 27 in each of the partial transmissions 15a, b meshes ( Fig. 15 ). On the underside of the turntable 14 is concentric with the ring gear 53 a annular detent contour 52 formed with a 15 ° pitch, which has periodic depressions with oblique edges ( Fig. 17 ), whose apexes 54 are each 15 ° apart. The oblique flanks favor an automatic engagement of the turntable at the apex 54, even if the pusher 16 has not been fully depressed. The detent contour 52 opposite locking means are provided in the housing 11 and the gear 15, which cause a largely independent of the stroke of the pusher 16 locking the turntable 14 in 15 ° increments. The locking means comprise five circumferentially distributed in the housing 11 and the gear 15 mounted balls 17, which are pressed by means of compression springs 18 against the locking contour 52. Three of the five balls 17 and springs 18 are housed in bores 50 in the housing 11 ( Fig. 18 ). The other two balls 17 and springs 18 are seated in corresponding bores 50 in the gear 16 (FIG. Fig. 11-14 ). So that the transmission 11 integrated in the housing 11 with its upper bridge 19 connects seamlessly to the remaining part of the housing 11 and forms a continuous bearing surface for the turntable 14, is in accordance with the housing 11 Fig. 18 a corresponding cutout 55 is provided, which receives the gear 11.

LIST OF REFERENCE NUMBERS

10

watch

11

casing

12

glass holder

13

mounting ring

14

Turntable (couronne)

15

transmission

15a, b

subtransmissions

16

handle

17

Bullet

18

compression spring

19

upper bridge

20

lower bridge

21,22,24,26

wave

23,25,27

pinion

28

spring leaf

29.30

screw

31

guide pin

32

groove

33

spigot

34

bearing sleeve

35

Crown

36

bolt

37

pusher head

38

shift finger

39

Screw

40

compression spring

41

spacer

42

compression spring

43

Seal (O-ring)

44

pen

45

commitment

46

sliding surface

47,48,49

latching depression

50

drilling

51

dial face

52

catch contour

53

sprocket

54

vertex

55

countersink

56

ratchet

57

Tooth (ratchet wheel)

58

Rest summit

59

push button shaft

60

bevel

Claims (17)

1. Wristwatch (10) with an analogue time display which can be rotated about a central axis and with a rotating rim (14) rotatably mounted in a housing (11) for setting a time zone which differs from the local time zone, wherein the rotating rim (14) can be adjusted in a stepwise manner optionally in a clockwise or anti-clockwise direction by means of a button (16) arranged on the housing (11), wherein
   the button (16) can be activated along a radially oriented button axis (59), and the button (16) is capable of driving the rotating rim (14) via a drive unit (15) integrated into the housing (11),
   characterized in that the rotating rim is arranged concentrically to the central axis, and
   that the drive unit (15) has two partial gears (15a, b) which are implemented in a mirror-inverted manner relative to a central plane passing through the button axis (59) and are connected to the rotating rim, and that in order to adjust the rotating rim depending on the selected direction of rotation, the button (16) can be made to engage with one of the partial gears (15a, b).
2. The wristwatch according to Claim 1, characterized in that on a scale surface (51) visible from the outside, the rotating rim (14) is divided into 24 hour increments, and that the button (16) moves the rotating rim (14) in one or the other direction of rotation in 15° steps.
3. The wristwatch according to Claim 1 or 2, characterized in that the button (16) for selecting the engagement with one of the partial gears (15a, b) can be rotated about the button axis (59), wherein the button (16) can assume a first rotation position in which it engages with the one partial gear (15a), and can assume a second rotation position in which it engages with the other partial gear (15b).
4. The wristwatch according to Claim 3, characterized in that between the first rotation position and the second rotation position the button (16) can assume a neutral third rotation position, in which it is not engaged with either of the partial gears (15a, b).
5. The wristwatch according to Claim 4, characterized in that the button (16) is held in each of the rotation positions in a locking manner.
6. The wristwatch according to any one of Claims 1 to 5, characterized in that each of the partial gears (15a, b) has a ratchet (56) implemented as a toothed wheel, into which in the first or second rotation position the button (16) engages in a tangential direction when it is pressed with a shift finger (38).
7. The wristwatch according to Claim 6, characterized in that the shift finger (38) is mounted on the button (16) in a spring-loaded manner at right angles to the button axis (59).
8. The wristwatch according to Claim 6 or 7, characterized in that the teeth (57) of the ratchet (56) are implemented such that they emerge at an angle to the radial direction, and that the shift finger (38) is chamfered (60) on its reverse, in such a manner that when the button (16) is pressed the shift finger (38) with its wedge-shaped tip engages behind the teeth (57) of the ratchet (56), while when the button (16) is released the shift finger (38) with the chamfer (60) slides down over the teeth (57) of the ratchet (56), in an elastically compressing and therefore yielding manner.
9. The wristwatch according to Claim 3 or 4, characterized in that to make the respective rotation position of the button (16) visible, markings (45) are applied to the button.
10. The wristwatch according to any one of Claims 1 to 9, characterized in that each of the partial gears (15a, b) has a plurality of shafts (21, 22, 24, 26) with a toothed drive and has pinions (23, 25, 27) seated on the shafts (21, 22, 24, 26), that the pinions (23, 25, 27) are fixed on each of the shafts (21, 22, 24, 26) by a frictional connection, and that to prevent slippage the pinions (23, 25, 27) on each shaft are additionally connected to the toothed drive by a form fit.
11. The wristwatch according to Claim 10, characterized in that to produce the form fit between the pinion and the toothed drive of a shaft the toothed drive has journals (33) extending in the axial direction, with which it engages in a corresponding radial groove (32) in the pinion.
12. The wristwatch according to any one of Claims 1 to 11, characterized in that each of the partial gears (15a, b) has securing means (23, 28) which prevent twisting of the partial gear (15a, b) when the button (16) is not depressed.
13. The wristwatch according to Claim 12, characterized in that the securing means comprise a pinion (23) rotating with the partial gear (15a, b), in the interdental gaps of which a tangentially positioned leaf spring (28) with a latching point (58) arranged at the free end engages in a locking manner.
14. The wristwatch according to Claim 13, characterized in that the pinion (23) is arranged together with the ratchet wheel (56) on a common shaft (21).
15. The wristwatch according to any one of Claims 1 to 14, characterized in that the rotating rim (14) is mounted between the housing (11) and a glass retainer (12) bolted onto the top of the housing (11), and that the rotating rim (14) has a toothed rim (53) on the underside, which meshes with one output-side pinion (27) each in each of the partial gears (15a, b).
16. The wristwatch according to Claim 15, characterized in that on the bottom of the rotating rim (14) an annular locking contour (52) divided into 15° increments is formed, and that opposite the locking contour (52), in the housing (11) or the gears (15) respectively, locking means (17, 18) are provided which cause the rotating rim (14) to lock in position in 15° steps.
17. The wristwatch according to Claim 16, characterized in that the locking contour (52) has periodic depressions with sloping edges, the vertices (54) of which are spaced apart by 15°, and that the latching means in the housing (11) or in the gears (15) comprise ball bearings (17) which are pressed against the locking contour (52) by means of compression springs (18).

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