SU714344A1 - Device for sped-up correcting for data of calendar disc - Google Patents

Description

one

The invention relates to the field of instrumentation and can be used in wristwatches with calendar devices.

The calendar devices for accelerated adjustment of the number, calendar rings containing a convertible shaft with a cam clutch moved along it with the transferable and crank arms and a cam in constant engagement with a switch directly interacting with the teeth of the numerical ring and fixed by a special spring in a certain position | 1}.

However, in this design it is necessary to place the switch in the immediate vicinity of the spiral ring, which is structurally difficult to implement and leads to a sharp increase in the diameters of the toothed parts involved in the transmission of rotation from the transfer roller to the numerical ring. This complicates the design of the device and significantly reduces its reliability.

The aim of the invention is to improve the reliability of the device.

For this purpose, in the device for accelerated adjustment of a numeric calendar ring, the switch is made in the form of a spring fixing neutral cam positions and is provided with a tooth for interacting with the numerical ring, and the cam is equipped with three teeth alternating with flat sections.

FIG. 1 shows the proposed device, a general view; in fig. 2 shows successive positions of the interacting parts of the device during operation.

A fixed cam 2 is mounted on the transfer shaft 1, the profile of which is provided with three teeth 3 alternating with flat sections. The end of the cam 2 is made in the form of a hub with ratchet teeth 4 interacting at the time of engagement with the cam clutch 5. The clutch 5 is mounted on the square of the transfer roll 1 with the possibility of moving along it.

On the square of the clock mechanism (not shown) there is a translation block 6, which enters with one shoulder into the shaft undercut I and the profile of the other in contact with you, using the 3 stupas of the winding lever 7. The profile of one of the arms of the transfer arm 6 is made in the form of three recesses used for the protrusion of the lever 7, at different positions, the transfer (s) of the shaft: neutral, the adjustment of dates, the translation of the arrows The lever 7, installed with a preliminary tension on the fixed part of the clock mechanism, enters one of the shoulders into the cam notch couplings . The switch 8, which directly implements the kinematic connection with the phase ring 9, the tooth 10, is made in the form of a spring fixed on the fixed part of the clock mechanism, and fixes the cam 2 along the flat sections of its profile. The device for accelerated adjustment of the numeric ring calendar works as follows. When the transfer shaft is pulled from the neutral position to the second position (date adjustments), lever 6, rotated about its axis (in this case counterclockwise), releases the crown 7, which under the action of elastic forces, it sinks with its protrusion into the adjacent recess of the transfer lever 6. In this case, the coupling 5, moved by the winding lever along the transfer shaft 1, engages with the ratchet teeth fixed th cam 2. When the conversion shaft is rotated clockwise (structurally selected working direction of rotation of the numerical ring 9), the cam 2 overcomes the vertical pressure of the switch 8, which fixes

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Claims (1)

. . . f it is in a neutral position but a flat section of the profile, lifts the switch 8 and 1SHOW its tooth 10 into the zone of interaction with the numerical ring 9. Next, the cam 2, resting one of the teeth 3 on the end of the switch 8, changes the last one in the horizontal direction, and turn the tooth 10 throws the next tooth of the numeric ring 9. At the same time, the Switch 8 occupies the uppermost position, and gradually lowering the tooth, removes the tooth 10 from the zone of interaction with the ring 9. Next, disrupting the tooth 3 of the cam 2, the switch. 8 is sharply lowered onto another flat portion of the cam profile 2, locking it in the neutral position. Claims The device for accelerated adjustment of a numeric ring calendar, containing a conversion shaft, cam, cam clutch, as well as a winding and shifting levers, a switch and a numeric calendar ring, characterized in that, in order to increase reliability, the switch is made in the form of a spring that fixes a neutral the position of the cam, and is provided with a tooth for interacting with the number ring, and the cam is provided with three teeth alternating with flat portions. Sources of information taken into account with; Examination I. Patent Frarar of tion No. 2020364, cl. G 04 B 19/00, 1972 (prototype). Fi.2