DE8200427U1 - Watch movement - Google Patents

Description

JGbm 136
Fg / Kr

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GEBRÜDER JUNGEANS GMBH, D-7230 Schramberg

Watch movement

The invention relates to a watch movement according to the preamble of claim 1.

In such works is the adjusting shaft - or at least that part of the adjusting shaft that goes through a hole in the watch case wall protrudes through and is equipped on the outside with a crown for operating the control shaft - removable, because I with the movement in the direction of its axis, i.e. in the direction of the pointer shafts, taken out of the hollow cylindrical housing or can be used in this. With relatively tall works and comparatively bulky ones equipped with them Wrist watch cases in waterproof design, with- «' For example, as diving watches, it is known to use the Stellwel- | Ie to train in two parts, the factory part of the Adjusting shaft ends in the area between the movement and the inner wall of the housing and the one that can be inserted through the bore of the housing wall second part of the control shaft inserted telescopically into that front end and frictionally engaged by the corresponding axial pressure can be set therein. The disadvantage with | this solution that the factory, so not removable Part of the actuating shaft for this anchoring of the crown-side actuating shaft part is a comparatively very large one Must have diameter, which is why this approach, apart from the mounting uncertainties in the event of contamination the socket for the outer control shaft part in the factory control shaft part, for modern, flatter ones

Works cannot be taken. Instead, the actuating shaft is usually detachably fastened when the

, small watch movements through the positive engagement of a Angle lever in an adjusting shaft groove, the defined axial positions of the adjusting shaft by an elastic Locking of the opposite end of the angle lever are ensured; to release this adjusting shaft lock a stamp built into the work is to be actuated from the rear of the work or a correspondingly effective one Insert the tool into a hole in the factory to ensure that the positive • / locking angle lever engagement in the adjusting shaft groove is parallel to be able to push out towards the work axis and then pull the adjusting shaft out of its work block bore. The disadvantage of this common solution is the construction effort to ensure the actuation engagement from the rear of the work through the work block and the space required for pivoting and elastic locking Support of the angle lever; in particular, however, the requirement for access to the work from its rear side, see above that either a bottom opening in a cup-shaped watch case designed for introducing the unlocking tool or one that can be removed from the hollow cylindrical housing wall Housing bottom must be provided. In such a case

j, however, there are considerable sealing problems, apart from

25 of the higher manufacturing and testing costs of such housings.

In contrast, the invention is based on the object, in particular for flat watch movements that can be installed in simple housings with high tightness requirements, a suitable solution for the detachable fixing the control shaft.

This object is achieved in a watch movement of the generic type in that it is according to the characterizing Part of claim 1 is designed.

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This solution is again only a one-piece, that is, as a whole from the work and from the housing surrounding it removable control shaft provided, but now not positively but non-positively fixed in the work block is. For this purpose, a spring element is used, which at the same time the axial positioning in the different St-ellwelle handling positions is used. This is the Reduced expenditure on individual parts. Such a spring catch can be set flat on the work block, claimed so there is no design space beyond the engagement with the actuating shaft within the work itself; it can be designed in the shape of a disk and thus at the same time on the dial side The pointer mechanism cover is used to protect against damage, e.g. in the course of handling when installing the housing of the work is protected. The axial force to move cer control shaft between its operating positions can easily be clearly different from the much larger required by appropriately specifying the ramp gradients Axial force to overcome the locking flank, i.e. to loosen the non-positive control shaft definition so that it is practically impossible to use the control shaft due to unwanted manipulation of the control shaft accidentally pull it out completely.

According to an advantageous development of the solution according to the invention, the spring detent is for the setting shaft fixing integral part of a one-piece spring plate, on which other spring elements for the control shaft function, in particular for the geared pointer adjustment, what the compact structure in the spatial Environment of the control shaft promotes.

In this way, a very flat, small movement is made possible, from which inexpensive watches with high tightness are possible can be created with little assembly effort by simply installing the movement in a pot-shaped housing with no breakthroughs with the exception of the usual housing wall drilling

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Establish tion for the control shaft passage and / or are to be sealed; whereby the definition of the work in »pot-shaped Case by clamping the radially protruding edge of the dial support between the front edge of the case wall and a bezel fixed on it.

Further features and advantages of the invention emerge from the following description of one of the drawings below Restriction to the essentials, simplified but approximately scaled preferred exemplary embodiment for the solution according to the invention. It shows, each in a broken, enlarged representation:

1 shows the movement in a pot-shaped housing Longitudinal section through its control shaft axis,

FIG. 2 the spring plate covering the movement according to FIG. 1 from the front with adjusting shaft spring detent formed on it and

3 shows a view of the spring plate according to the direction of view arrows III in Fig. 2 "

The movement 1 shown in section in FIG. 1 is a very flat wristwatch movement with quartz stabilized electronic time-keeping circuit 2 for the time-proportional drive of pointer shafts 3 by means of a (not shown in the drawing) electromechanical Converter, in particular small clocks stepper motor, which is geared to the pointer mechanism 4 via a gear train.

At right angles to the axis 5 of the pointer shafts 3 and thus of the movement 1, a preferably one-piece adjusting shaft protrudes into this 6. Their factory end 7 and their one larger

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The end 8 on the crown side having a diameter are cylindrical and axially displaceably radially supported in corresponding bores in the work block 9. A crown 10 is screwed on in a known manner on the part of the crown-side position shaft end 8 protruding from the movement 1. In the present case of a pointer mechanism 4 driven by an electronic circuit 2 with mechanical and manual pointer adjustment, the actuating shaft 6 only requires two different axial detent positions, namely the rest position pressed into the mechanism 1 and the withdrawn or working position shown in FIG. 1. In this there is a geared, i.e. torsionally rigid connection from the crown 10 to the change gear 11 of the pointer mechanism 4 - namely for manual rotation of the hour hand and minute hand shafts 3 - via the adjusting shaft 6 and an intermediate crown wheel 12 arranged in a sliding fit on it, as well as an in engagement with it standing corrector wheel 13 that is positioned transversely to it and thus parallel to the change wheel 11 is produced. The latter, with its stub shaft 14, is ^{adjacent to the factory adjusting shaft end 7 in a tapered actuating shaft area 15j for height control against the S -} CeIlWeI Ie 6, radially with respect to this and axially with respect to the corrector wheel 13, supported on this tapered area 15 closes Via a frustoconical or conical run-up bevel 16 in the direction of the crown-side adjusting shaft end 8, a likewise cylindrical extension 17, however, of larger diameter, against the outer surface of which the corrector wheel stub shaft 14 is supported when the adjusting shaft 6 is pressed into the rest position; with the result that the corrector wheel 13 is pivoted about its tooth engagement with the intermediate crown wheel 12 and its diametrically opposite tooth engagement with the change wheel is canceled, as described in more detail in the applicant's patent application P 31 13 019.4 of 04/01/1981 .

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At the approach 17 closes in the direction of the crown-side adjusting shaft end 8 also coaxially another Run-up bevel 18 on; followed by a prism pole 19 trained sliding seat for the axially movable but torsionally rigid coupling between the actuating shaft 6 and the intermediate crown gear 12, which in turn prevents axial displacements within the work 1 in at least one slot 20 is guided, which is formed, for example, in a base part 21 fastened to the work block 9 or in a spring plate 31 is.

A locking collar 23, which runs around the edge of a flange disk, adjoins the prism rod 19 on the crown-side adjusting shaft end 8 via a further run-on bevel 22. This then goes to the control shaft end 8 on the crown side via a locking _{flank 25 f} deron slope is substantially steeper than that in particular of the run-up bevels 26 on both sides of a locking bead 24, into a locking groove 27, which on the other side of the locking bead 24 is a further locking groove 28 for the inserted, So the rest position of the control shaft 6 follows. Here, then the radially geführ- factory block 9 \ te cylindrical crown-side actuating shaft end 8 includes as steilwandiger approach.

A spring catch 29 engages radially in one of the two catch grooves 27, 28 with respect to the adjusting shaft axis; where at Transition from the one to the other setting shaft position the spring detent 29 via the detent bead stop bevels 26 radially is deflected before it dips into the other locking groove 28 or 27 and thereby the new axial position of the adjusting shaft Are defined. The spring catch 29 in turn is under the work block 9, that is, in front of the dial-side Surface of the work 1 set, as explained in more detail below.

For insertion in the plant 1, the control shaft 6 is in the

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I lateral opening that extends transversely to the work axis 5-

I inserted the actuating shaft bore 30} whereby according to Art

I of a purchased leaf spring in the area of the drilling

I tion 30 radially immersed end of the spring catch 29 from the co-

! 5 nically tapered, factory-made adjusting shaft end 7 and there-

\ according to the order in which they are axially offset from one another

* Start-up saws 16, 18 and 22 are deflected radially. Submitted

? see from the crown.vtigen, radially guided in the bore 30

I th control shaft end 8, the locking collar 23 has the largest

I 10 th diameter, so causes the largest deflection of the

I spring catch 29 with subsequent steep collapse into the

I adjacent locking groove 27. It is therefore necessary for manual insertion

I ben the control shaft 6 easily noticeable when it is in this-

1 is the final assembly position, which is also the working position

\ 15 development for the actuating shaft and to the

4 with further axial thrust over the again

; '' rather inclined approach slope 26 only the second locking

: position, namely for the control shaft rest position, an-

1 closes.

20th

f ^T // egen the in relation to the inclination of the latching bead-chamfers 26 very steep locking collar edge 25 is practically excluded during manual axial displacement from the rest position into the working position, erroneous extraction of the actuating shaft 6 of 25 the work 1; because for the spring catch 29 to run up on the steep locking flank 25, a multiple, depending on the inclination dimensioning, for example

: shows at least four times the tensile force required.

On the other hand, it is necessary to take out the adjusting shaft 6 30 is no longer required for factory 1 in the course of factory installation or expansion processes, by means of a special tool and / or a separate assembly to be arranged in Plant 1

_{t the} structural part to release an actuating shaft lock that engages positively in the actuating shaft profile. 35 Rather, it is sufficient, if necessary, even by hand or

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if necessary by means of a tool, after axial Transition from the rest position to the working position to exert a considerably higher tensile force on the actuating shaft 6, so that the spring catch 29 is then raised over the steeper locking flank 25 and when it is pulled out further the adjusting shaft 6 on the profiling of the factory End 7 slides off.

Since the spring catch 29, which ends at angled over the bevels and flanks for deflection, is subject to considerable bending stresses, especially when sliding onto the steep locking flank25, is exposed, it is preferably as a protruding part of a one-piece on a large-area spring plate 31 (integral) integrally formed spiral spring arm 32, as in detail from the top view and the side view according to FIG. 2 and FIG. 3 can be seen. The one under movement 1, namely on its dial-side surface33 Fastened, preferably screwed on, spring plate 31 has an outline which is approximately the base of the work 1 is equivalent to. The spring plate 31 surrounds the pointer shafts 3 with a central bore 34; and it has through holes 35, through the clamping feet 36 on the back of a dial support 37 for attachment to Work 1 protrude and protrude into the associated clamping bushes (not shown in the drawing) in work block 9 can, or in the fastening projections formed under the work block 9 (not shown in the drawing) can intervene to hold the spring plate 31.

The edge of the spring plate 31 in the area of the control shaft end 8 on the crown side runs in a rough approximation in the shape of a segment of a circle transversely to the adjusting shaft axis 38. Parallel to this boundary extends the flexural spring arm 32, the through one of its front end 39 into the surface of the spring plate 31 engaging strip-shaped punching 40 of

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the adjacent surface of the spring plate 31 is delimited, but connected to it in one piece with respect to the front end 39 is. In the central area of the flexible spring arm 32, one of the rest of the spring plate is along the adjusting shaft axis 38 31 pointing protruding tab 41 left standing during the contour punching of the spring plate 31, its free End as a spring catch latch 42 (to interact with the run-up bevels and the locking flank on the adjusting shaft 6) is angled approximately at right angles out of the plane of the spring plate 31 and thus the work surface 33.

With an arched edge towards the central bore 34, an arcuate recess 43 punched out of the material of the spring plate 31 follows the punching 40 symmetrically to the adjusting shaft axis 38, which is limited to the punching 40 by a bridge 44 formed in one piece with the spring plate 31. On this bridge, protruding in the direction of the central bore 34, that is to say protruding into the recess 43, a projection is formed which, as a corrector spring, rests elastically from below against the corrector wheel 13, around its stub shaft 14 axially against the shoulder 17 or the tapered factory Press down end 7 of adjusting shaft 6. At the same time, in order to ensure a planar support and guidance of the corrector wheel 13 in the area next to the toothing engagement with the intermediate crown wheel 12, which here dips into the slot-shaped spring plate cutout 40 with a collar 46 for axial guidance, there are bends 47 at the two ends of the bridge 44 pronounced in order to move this together with the slightly employed Korrektorfe ^de r 45 from the main plane of the spring plate 31 to the back of the corrector wheel 13, as can also be seen from FIG.

Due to the large-area support of the spring plate 31 on the dial-side movement surface 33 and in the course of

... 10

Profile punching formed in one piece on the spring plate 31 Spring arms in the form of the spring catch 29 and the corrector spring 45 is due to the geometric design of the transitions and through the choice of material for the spring plate 31 » high mechanical and alternating stress stability, the respective spring constant can be specified within a wide range in order to optimal interaction with the corrector wheel 13 and in particular with the locking bead 24 and the locking collar 23 the control shaft 6 to ensure.

Because due to the non-positive locking of the control shaft 6 with the spring catch 29 on the locking flank 25, as explained, increased axial tensile stress on the Stellwelleö is sufficient, to solve this from the definition in the factory 1 and take it out, so that the approach of an unlocking tool is omitted on the bottom part 21 of the work, the work 1, as shown schematically in FIG. Wristwatch) housing 48 with a one-piece design of the housing wall 49 and completely closed housing base 50 can be used. This eliminates the technical production and assembly-technical effort for a specially, in particular tight, to be connected to the wall 49 floor 50 or for the attachment and sealing of floor openings for attaching an adjusting shaft unlocking tool. Plant 1 only needs to be sunk into the cup-shaped housing 48 with the adjusting shaft 6 removed, until, for example the dial support 37 rests with its protruding edge 51 in the area of the front edge 52 on the housing wall 49, for example, sunk into a recess 53. To close the housing 48 then only needs the bezel 54 put on after the pointer assembly, for example screwed on or clamped on, and the one with the crown equipped adjusting shaft 6 to be inserted through a housing wall bore 55 sealed as usual, wherein the intermediate axially supported in plant 1 with radial play

... 11

Crown wheel 12 until it reaches its sliding fit on the prism rod 19 on the stepped thickening Adjusting shaft 6 pushes on from its factory end 7.

... 12

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JGbm 136
Fg / Kr

Summary

In the case of a watch movement (1), a simple constructive solution for a pull-out adjusting shaft (6) is to be given will. For this purpose, the one-piece adjusting shaft (6) is frictionally fixed in the wark block (9), namely by means of the same spring catch (29) that is used for the axial position positioning in the pushed-in rest position or in the pulled-out actuation position of the actuating shaft (6) is used. About the different inclination of the bevels (26) between these two locking positions and With a locking flank (25) on a locking collar (23) that runs around behind it, it is possible to specify how great the force is : For dismantling the control shaft (6) in relation to the normal operation Control shaft displacement is. Formation of the spring catch (29) on a spring plate (31), which also serves other control shaft functions. Inexpensive installation option in a cup-shaped, closed wristwatch case (48), which does not have a removable base (50) or base perforations for exne control shaft unlocking needs to have.

(Fig. 1)

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JGbm 136
Fg / Kr

Reference list

1 plant (in 48)

2 circuit

3 pointer shafts' * · pointer mechanism

5 axis (from 1/4)

6 shaft

7 factory end (of 6)

8 crown-side end (from 6 to 7)

9 work block

10 crown (at 8)

11 bill of exchange d (of 4)

12 intermediate crown wheel (on 6/19)

13 corrector wheel (between 12 and 11)

14 stub shaft (from 13 to 6)

15 tapered control shaft area (at 7)

16 bevel (from 15 to 17)

17 approach (between 15 and 19)

18 bevel (from 17 to 19)

19 prism pole (between 17 and 23)

20 slot (for 12 in 21)

21 bottom part (from 1 to 9)

22 ramp (from 19 to 23)

23 locking collars (between 19 and 27)

24 locking bead (between 27 and 28)

25 locking flank (from 23 to 27)

26 start-ups (24 on both sides)

27 locking groove (for 29)

28 locking groove (for 29)

29 spring detent (on 31)

30 hole (in 9 for 8)

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31 spring plate (on 33/9)

32 spiral spring arm (for 29)

33 surface (from 1/9 to 37)

34 central hole (in 31 for 3)

35 through holes (in 31 for 36)

36 clamping feet (at 37 in 9)

37 dial support

38 axis (of 6)

39 front end (of 32)

40 cutouts (between 32 and 44)

41 lobes (on 32)

42 latch (on 29-32)

43 recess (in 31 behind 44)

44 bridge (between 43 and 40)

45 corrector pen (at 44 in 43)

46 Bund (& n 1Σ. In 40)

47 Abkröpfurigen (both sides 44)

48 housing (by 1)

49 wall (of 48)

50 floors (from 48 to 49)

51 margin (from 37 to 52)

52 front edge (from 49 to 54)

53 recess (in 52 for 51)

54 bezel (for 48 on 49/52)

55 bore (in 49 for 6/8)

Claims (8)

JGbm 156 Fg / Kr - 12 - claims for protection 1. Watch movement (1) with pull-out shaft (6), characterized, deß the adjusting shaft (6) in one piece with one another axially offset locking grooves (27, 28) on both sides of at least one locking bead equipped with starting saws (26) (24) is formed, in which a spring catch (29) engages transversely to the adjusting shaft axis (58), and that axially in Offset towards the factory setting shaft end (7) in addition to the last of the locking grooves (27), one which is considerably steeper than the stop bevels (26) Locking flank (25) is formed. 2. Plant according to claim 1,
characterized, that the steeper locking flank (25) to the crown-side Control shaft end (8) is formed on a locking collar (23), the diameter of which is larger than all others on the adjusting shaft (6) formed diameter, with the exception of the radially guided in a work block bore (30) Crown-side control shaft end (8) self-jist. 3. Plant according to claim 2,
characterized, that from the locking collar (23) to the factory setting shaft end (7) the adjusting shaft diameter stepped, with the formation of run-up saws (22, 18, 16) on the Step transitions, decreasing * ... 13 - 13 - 4. Plant according to one of the preceding claims, characterized in that that the spring catch (29) in one piece on a spring plate (31) is formed, which extends over the dial-side movement Obsrflache (33). 5. Work according to claim 4,
characterized, that the spring catch (29) is formed on a spiral spring arm (32) which is transverse to the actuator shaft axis (38) extends. 6. Work according to claim 5,
characterized, that the spiral spring arm (32) to the center of the spring plate (31) is delimited by a slot-shaped punch (40) in which the locking collar (23) non-rotatably arranged in the axial sliding seat a ^ if the adjusting shaft (6) Intermediate crown gear (12) is axially supported. 7. work according to claim 6,
characterized, that in addition to the slot-shaped cutout (40) parallel to the spiral spring arm (32) on the spring plate (31) an offset extending bridge (44) is formed in one piece with the spring plate (31), from which into a The punched-out recess (43) extends into a corrector spring (45) which axially counteracts this spring force tiltable and with the intermediate crown wheel (12) the meshing corrector wheel (13) presses, which with a stub shaft (14) according to the engagement of the spring catch (29) in the locking grooves (27 * 28) against control shaft areas (15, ^ different Diameter is pressed. ... 14 - 14 - 8. Plant according to one of the preceding claims, characterized in that that it is in a cup-shaped housing (48) with one-piece Formation of the bottom (50) and hollow cylindrical wall (49) used in the definition of the dial support edge (51) in the area of the housing wall front edge (52) is.