DE2215660A1 - Time setting device for electric clockworks - Google Patents

Description

Hamburg, 24 March 1972 _o

Priority: March 27, 1971, Japan, Gbm.-Anmo No. 21 819/1971

Applicant:

Citizen Watch Company Limited

9-18, 1-chome, Nishishinjuku, Shinjuku-ku,

Tokyo / Japan

Time setting device for electric clockworks

The invention relates to improvements in the time setting device of a so-called electronic clockwork, which is provided with a second hand holding device _{or the like}

It is a significant disadvantage with conventional electronic pins Movements equipped with a time ax device are that an adverse reaction force from the side of the time indicating hands through the Oe-itr / iebe on the electronically operated drive in the Erk -. u'responsefco

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It is also a known disadvantage that the second hand not immediately after performing a steep fore, gear or a second hand holding process can start »This is due to the unavoidable occurrence of repercussions in the time display part of the movement or the like, especially in the U'all that the clockwork not with a slightly larger gear or gears for transmission to the second hand shaft can be equipped. This, in turn, is due to the complex, compact interior of the movement.

The invention therefore aims to provide an improved timing device for an electronic clockwork, in particular for a watch, in which the above-mentioned various known disadvantages are avoided.

The invention aims in particular to provide an improved time division device of the type mentioned above, in the case of the detrimental retroactive effect from the pointer side through the gear train back to the electronic Drive of the clockwork is avoided, especially if the second hand shaft is not with a larger gear or larger gears is equipped ο The invention further aims that the second hand practically momentarily after executing a steep process or a stopping process begins to run

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is achieved with the invention that after execution of the stopping process for the second hand all the time representing pointer are held in their special relative position «.

The device according to the invention is characterized in that the second hand shaft is provided with a clutch and a locking cam, the clutch serving as a second hand pinion to switch on or off opposite the second hand shaft.

Further advantages and features of the invention emerge from the claims as well as from the following description and the drawing, in which exemplary embodiments of the invention are explained and illustrated.
Fig. 1 is a simplified sectional view of a

first embodiment of the invention, FIG. 2 shows a representation similar to FIG

second embodiment and

Fig. 3 is a perspective view of a clutch spring used in the device of Fig. 1.

A device according to the invention, see FIG. 1, has a second hand shaft 1 on which a clutch spring 2, see also Fig. 3, and a control cam 3 firmly attached

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are arranged »A first second hand pinion 4 is in Usually fixed on the shaft 1

A second second hand pinion 5 is freely rotatable arranged on the shaft 1 and dimensioned slightly larger than the first pinion «It is provided with a central bore, to enable the arrangement on the shaft in the first embodiment. From a double provided Third gear, a second third gear 6 is held in engagement with a conventional fourth gear 8 and is freely rotatably arranged on a conventional third gear shaft 7. The fourth gear 8 is through im individual gears, not shown, with a drive of the clockwork, also not shown, in connection, in order to receive a drive torque from there in a known manner

A compression spring 9 is only partially shown on its foot part by means of a clamping screw 20 fixed member 21 of the clockwork and exerts an upward axial pressure with its free end on the pinion J? from that so effective at axial fluctuations is prevented from its position, constantly during the regular time display and also during Occasional time setting and second hand holding operations.

The second third gear 6 is on a socket member

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arranged and united with this for uniform rotation to one part. A hollow stone 11 is firmly on the jj'assungs member 10 arranged, although in the drawing a gap is shown, which is only intended to indicate the presence of two separate parts,

A first third. Wheel 12 of the gear train is fixedly arranged on a conventional third pinion 15 and is in Engagement with the first second hand pinion 4 held.

A conventional second wheel 14 of the gear train meshes with the third pinion 1J and thereby becomes in cooperation held with the gear train «,

A resilient stop lever 15 is with its Eußende by a clamping screw 22 on a second, only partially shown stationary plate 23 of the clockwork attached and formed with an inclined or cranked part 16 The stop lever 15 can by pressure contact with a control lever 17 in the case of a time setting process or a second hand stopping operation, be forcibly bent downwards, the tip or the inner end of the lever 15 is brought into contact with the clutch spring 2. The control lever 17 is only in Cross-section shown for the sake of simplicity and can be moved from its non-actuated position, not shown, to FIG the working position can be moved in which the control lever

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is brought into pressure contact with the inclined portion 16 of the lever 15. Although not shown, the Wearers of the clock fitted with the movement handle an external actuator, preferably the usual winding shaft or something like that to use the joystick 1? along the underside of the plate 23 back and forth or between his inactive and his working position as desired to move",

In the above description, the clutch spring is 2 shown and described as being fixed to the shaft · The invention, however, is not to this particular one Construction limited. It is sufficient for such an arrangement if the second hand tickle 5 »if desired, can be separated in its function from shaft 1, as described below »

The clutch spring 2 is enlarged in FIG. 3 and shown diagrammatically. The clutch spring 2 is so shaped and arranged that when in the position shown in Figure _e 1 position an axially directed pressure in the direction of an arrow a in an upwardly and axially extending projection is applied 2a, a second circumferential projection 2b in the axial direction is bent out, namely in the opposite direction, see the arrow / b «, A third axial projection 2a ¹ is provided in order to absorb an axial compressive force such as that acting on the projection 2a. By

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Application, this axial pressure force, the associated circumferential projection 2b ^{1 is} axially bent out in the case of the corresponding circumferential projection 2b "The two axial projections 2a and 2a ¹ are arranged diametrically opposite. The two circumferential projections 2b and 2b ¹ are in the same positional relationship to each other ₉ A common Steering wheel 19 is shown only in a simplified manner and is connected to fourth gear wheel 8 in a rotationally fixed manner in the usual manner

The operation of those illustrated in Figures 1 and 3 first embodiment is described below

When the movement is in its normal running condition, the movement is transmitted by an electronically operated drive, not shown, which is a stepper motor, can be a balance shaft or the like, the or «, which is powered by a battery electronic Oscillating circuit and a mechanical vibrator, preferably a quartz oscillator, is driven «The movement is transmitted to the climbing wheel 19 and thus to the fourth gear 8, which rotated with the climbing wheel as a unit The movement is also from the fourth gear 8 via the second third gear 6, the second second hand pinion 5, the clutch spring 2, the shaft 1, the first clock hand pinion 4-, the first third gear 12 and the third pinion 13 on the second gear 14- and thus on

- 8th -

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a minute hand 24 and an hour hand 25 transferred "

When a timing and second hand locking operation is performed, the outer actuator is used to Example of a winding shaft, not shown, actuated in order to control the control lever 17 with reference to FIG to move to the right «. The lever 17 is then in Pressure contact with the inclined part 16 of the lever 15 brought, whereby this is forcibly moved with reference to the illustration of Fig. 1 down until the Holding lever comes into contact with the clutch spring 2. As a result, it is fixedly arranged on the shaft 1 is disengaged from the second second hand pinion 5 Pinion 5 is transmitted, thereby the further transmission of motion interrupted at this point. While otherwise some reaction when setting the clock or when If the second hand stops, this will now have an effect on the regular functioning of the electronically actuated drive avoided

By further actuation of the actuator this, see Fig, 1, pushed further to the right until it is the Control or holding cam 3 for locking the shaft 1 in their position. When shaft 1 is in its pinned state, it will be the first at the same time

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Second hand pinion 4-, the first third gear 12, the third pinion 13, the second gear 14 and the associated Transmission parts stopped at the same time. Therefore, the mutual positional relationship between the second hand, Minute hand and hour hand effectively set ",

If a ZeitstellVorgang is carried out under these locking conditions, the minute hand 24- and the hour wheel can be set to a desired point in time, since the rotary action caused by the rotary movement of the actuator, such as the winding shaft, in the usual way on the second wheel 14-, the third pinion 13, the first third wheel 12 and the first second pinion 4- can be transmitted ”, but during the set state in which the second hand shaft 1 is held by the locking cam by means of the lever 17, the one at 26 in Fig illustrated. 1 and stopped fixedly arranged on the shaft 1 second hand and is therefore not set in position, it only occurs a relative slip by an unshown slip mechanism _o

When the control or locking lever 17 is out of the above the mentioned insertion back to its rest position is set by operating the elevator shaft in the opposite direction of rotation after the setting process or The second hand stops stopping, the

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Shaft 1 released from its locked position and rotatable again and the clutch spring 2 is again with the Pinion 5 coupled. Under these circumstances, the time setting or second hand locking operation appearing force is not applied to the second hand pinion 5 act so that the reaction that otherwise occurs in the associated gear can be effectively suppressed « As long as the drive is working normally, the second hand can start moving immediately «

The third gears 6 and 12 are arranged one below the other with a certain amount of slip possible, occasional seizure avoided if a torque that could cause seizure is applied to it by their meshing with the second pinion 4 and 5 would act "

Referring to Fig. 2, the second embodiment of the invention will be explained in detail below. In this Embodiments are, insofar as the same or similar parts are used in the first embodiment, these denoted by the same reference number and feed of 100. This is intended to enable comparison and understanding regardless of minor deviations in shape between the Embodiments are facilitated «

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FIG. 2 shows a second hand shaft 101 on which a clutch spring 102 has a control or locking cam 103 in the form of a wheel and a second pinion 104 are fixedly arranged ο

A cup-shaped coupling member 130 is loose on the Second hand shaft 101 arranged and non-rotatably connected on its upper side with a second second pinion 105 « An elastic ring member 131 made of rubber, soft plastic or similar elastic material is fixed within the interior of the coupling member 130 is arranged. The clutch member 130 works with the clutch spring together and together with this forms a coupling unit O

A seat or holding member 119 is used to bring the clutch spring into the release position when actuated Compression spring 109 corresponds to spring 9 in the first embodiment and serves to prevent an occasional fluctuation in the position of the second hand, not shown to prevent during the regular running of the clock and during a second hand locking process.

While the clockwork is running for the regular time display, movement is provided by the sixth gear 132, the fifth gear 108 and an idler gear 105 on the second second hand pinion 105 transferred. In this case they will

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Pinion 105 and clutch member 130 are held together as one unit, and the torque is provided by the clutch spring 102 transferred to the shaft 101, from there through the pinion 104 and the third gear 113 to the second Gear 114.

During a time setting or while stopping of the second hand becomes the control or locking lever 117, which corresponds to the lever 17 in the first example, from the shown rest position in Fig. 2 shifted to the right in its working position by the elevator shaft or a similar, not shown handle is actuated o This causes the stop or locking lever 118 to move upwards pushed because the lever 117 abuts against the inclined portion 118a formed on the lever 118 * The lever 118 pushes

as a result, the seat or holding device 119 after above, and this in turn acts on the clutch spring to move it upwards. In this way, the Coupling unit brought into its released position · The Movement is therefore from the drive (not shown) to the coupling member 130 via a plurality of gear members transferred, but not to the second hand and the limbs located downward in the flow of movement.

In this case, too, it is excluded that any occurring during the setting or second hand locking process

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Reaction force can be transmitted back to the drive

By further shifting the locking lever 117 in "* 'igo to the right, as in the first embodiment, the shaft 101 is locked in that the end tip of the Locking lever 117 acted on the locking cam 103 attached to the shaft In this way, the third Gear 113 »the one with the first second pinion 104 in Is engaged, the second gear 114 and the associated gear parts held in their locking position. The one on top of the other The relative position of the second, minute and hour hands is thereby in a certain positive relationship held · If a timing operation is effected under these conditions, the rotation that is required becomes is to effect the timing, through the second gear 114 and the third gear 113 on the Transfer shaft 101 · Since in this case the shaft 101 is in its blocking position due to the interaction of Lever 117 and locking cam 103 is held, the minute and hour hands can be set; the adjustment process however, does not extend to the locked second hand.

The description shows that by using the invention Establishment of no detrimental reaction force from the second hand shaft back to the drive

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during a time setting or second hand locking process is transmitted »Therefore, even in this case, the sensitive drive can take time-counting steps keep working. Even in the event that the second hand is adjusted after locking, the positional relationship between the second hand on the one hand and the minutes - and hour hand on the other hand not disturbed. Therefore, with a single scheduling operation, all pointers in your Time display position can be corrected as required · In addition, the second hand can be set immediately after the Adjustment process or after triggering the locking process start walking again. This effectively prevents the display device from being out of phase or out of synchronization occurs, even in sensitive quartz watch movements in which the mechanical oscillator is in forced vibratory motion is maintained by using a certain external signal source · It occurs also no harmful backlash or recoil, even in a clockwork, in which on the second hand shaft no large gear can be arranged · The device according to the invention is therefore particularly advantageous in their application to sensitive, electronically operated precision clockworks, especially those with Quartz oscillators

- PATENT CLAIMS -

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Claims (1)

PAT EN CLAIMS (1o) Time setting device for an electronic clockwork with an electronic drive and with a gear including a second hand shaft with Second hand pinion arranged on it to transfer a movement from the drive to the shaft, characterized in that the second hand pinion is divided into two elements (4, 5; 104, 105) of which the first element (4; 10A-) is fixed and the second (5; 105) loosely on the shaft (1; 101) is arranged, and that a third gear (13; 113) with the first pinion element and a second gear (14; 114) meshes and the second pinion element for receiving movement from the second gear and a third gear is provided and both pinion elements are connected to one another by one from the outside of the clockwork actuatable coupling unit (2; 102, 130) can be coupled to one another. 2 _e device according to claim 1, characterized in that a locking cam (3; IO3) for fixing the shaft is fixedly arranged on the shaft (1; 101). - 16 ~ 209842/1092 · - 16 ~ Device according to claims 1-2, characterized in that the third gear is divided into two elements (6, 12) which are arranged with a slip to one another and which mesh with the second and the first pinion element (5i 4 ·). 4-, device according to claim 1 -3, characterized in, that the coupling unit contains a coupling spring (2; 102) ο 5ο device according to claim 4, characterized in that that the clutch spring (2), which is fixedly arranged on the shaft (1), is axially opposed to two with respect to the shaft has directed and oppositely movable projections (2a, 2b), 6β device according to claim 4, characterized in that that the clutch spring (102) in the clutch state in contact with a made of elastic material Clutch lining (131) of a second clutch element (130) is. 209842/1092