JPS5946354B2 - Clock with hour hand adjustment mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In recent years, with the rapid increase in the number of overseas travelers, there is an increasing demand for watches that can quickly adjust the time indicated on a watch in various parts of the world with time differences.

The present invention relates to a timepiece equipped with a pointer adjustment mechanism that adjusts the time indicated by the hour hand.

The conventional pointer correction mechanism rotates the winding stem to correct the indication, but even though the diameter of the winding stem is small, the amount of adjustment is large, so a large amount of rotation of the winding stem is required. In addition, the diameter of the crown attached to the winding stem is limited due to its design, and this has the major drawback of making it extremely difficult to operate.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a timepiece that allows one-touch hour hand correction using a mechanism that allows the time indicated by the hour hand to be corrected by operating an external mounting member.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a sectional view thereof.

In FIGS. 1 and 2, the correction is guided by the correction lever spring pin 2 fixed to the main plate 31, and is arranged almost along the outer shape of the main plate 31 using the correction lever spring spring pin 31a provided on the main plate as a fulcrum. The lever spring 1 is engaged with the bent portion 3a of the correction lever 3, applies force to the correction lever 3 in the outward direction of the main plate 31, and the elongated hole 3 provided in the correction lever 3
b and 3c slide while being guided by correction lever guide pins 4 and 5 fixed to the main plate 31, respectively, and the correction lever spring 1
The spring force is modified by the arcuate wall 3b1 of the elongated hole 3b.

Further, a correction lever pin 6 is fixed near the tip of the correction lever 3, and is engaged with an elongated hole 7a of the correction transmission lever 7 through a nip window 8a of the date dial pusher 8.

The modified transmission lever 7 is attached to the modified transmission lever pin 9 on the date wheel pusher 8.
A correction claw 11 is rotatably disposed on the upper surface of the correction transmission lever 7 by a correction claw pin 15.

The correction pawl 11 is regulated from rotating counterclockwise by a correction pawl degree determining pin 14 press-fitted into the correction transmission lever 7, and a correction pawl spring 12 crimped onto the correction pawl 11 is press-fitted into the correction transmission lever 7. It engages with the correction claw spring pin 13 to suppress clockwise rotation of the correction claw 11.

Further, the collar 10a of the correction transmission lever pusher pin 10 fixed to the date wheel pusher 8 prevents the correction transmission lever 7 from lifting up.

Further, the day wheel spring 21 disposed on the main plate 31 is fixed with a day wheel pressing screw pin 22 press-fitted into the main plate 31,
The rear gear 18, which is engaged with the pin 20 installed on the main plate 31, is pushed up, and the rear gear 18 is pushed up by the three rear gears press-fitted into the rear gear 8. It hits the rear chassis pin 19.

The back pinion pinion 33 press-fitted into the back gear 18 protrudes from the upper surface of the date pusher 8 through the elongated hole 8b of the pusher 8.

The operating lever 17, which is fixed to the back surface of the date wheel pusher 8 with two operating lever pins 16, has a two-step bent portion 17a. It is in contact with the upper surface 33a of the cylindrical portion of the back pinion 33.

The correction gear 27 meshing with the hour wheel 30 is loosely engaged with the shaft portion 26a of the correction cam 26 disposed on the upper surface of the date wheel presser 8, and the cylindrical portion 27a of the correction gear 27 is connected to the correction cam 26. The correction cam 26 is fitted into a ratchet spring 28 which is engaged with the teeth of a ratchet wheel 29 press-fitted into the shaft portion 26b of the correction cam 26.
The position in the rotational direction is determined by a correction cam spring 24.

The correction cam spring 24 is guided by a correction cam spring pin 25 press-fitted into the upper surface of the date wheel presser 8 and a date wheel presser set screw pin 22, and is fixed to the upper surface of the date wheel presser 8 by a date wheel presser set screw 23. There is.

Next, to explain the operation, when the correction lever 3 is pushed, the correction lever pin 6 pushes the wall of the elongated hole 7a of the correction transmission lever 7, and the correction transmission lever 7 rotates counterclockwise around the correction transmission lever pin 9. When the back surface of the correction transmission lever 7 pushes the two-step bent portion 17a of the operating lever 17, the operating lever 17 is pushed down, and the hino-ura kana 33 and the hour wheel 3 are pushed down.
Release the 0 mesh.

Even at this time, the tube pinion 32 and the rear gear 34 are in mesh with each other.

At the same time, the meshing between the hino-ura pinion 33 and the hour wheel 30 is released, and the correction claw 11 rotates the correction cam 26 counterclockwise to rotate the correction gear 27 via the ratchet wheel 29 and ratchet spring 28, causing the hour wheel 30 to rotate. Rotate.

When the correction claw 11 rotates the correction cam 26 by about 1/2 pitch, the teeth 26c of the correction cam 26 ride over the peak 24a of the correction cam spring 24, and are sent to 1 pitch by the spring force of the correction cam spring 24, and the correction cam 26 becomes stable.

At this time, the teeth 26d of the correction cam 26 push the side surface 11a of the correction claw 11, but the correction claw 11 presses against the teeth 26d of the correction cam 26.
d so that the correction cam can be stabilized in position.

Due to the rotation of the correction gear 27, the hour wheel 30, that is, the hour hand changes to 1.
It will be corrected by the time.

Since the correction lever 3 returns to its original state by the spring force of the correction lever spring 1, the correction transmission lever 7 rotates clockwise, and the operating lever 17 returns to its original state by its own spring force, and the back of the mill The car 34 is pushed up by the spring force of the Hinoura car spring 21.

Since the number of teeth on the hour wheel 30 is 48 in this case, 1 of the hour wheel 30
By adjusting the rotation by the time, it will mesh with the Hi-no-ura kana 33 four teeth ahead (or behind).

During normal movement, rotation is transmitted from the hour wheel 30 to the correction gear 27, and the correction gear 27 rotates the ratchet spring 28, but the claws of the ratchet spring 28 slide on the teeth of the ratchet wheel 29, and the ratchet wheel 29 and correction cam 26 rotate. does not transmit rotation to the

As described above, according to the present invention, by pressing the external operating member to correct the pointer, operability is greatly improved.
The correction time is shortened, and it is truly excellent in terms of practicality. It is also extremely effective in that it presents a practically useful additional mechanism that allows time-based corrections such as time difference corrections to be made with a single touch.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, and Fig. 2 is a plan view showing an embodiment of the present invention.
FIG. 3... Correction lever, 7... Correction transmission lever, 17... Actuation lever (wheel train engagement release lever), 26... Correction cam, 27... . . . Correction gear, 30 . . . Hour wheel, 35 . . . External operating member.

Claims (1)

[Claims] 1. An hour wheel to which the hour hand is attached, a Hinobara wheel rotatably supported by a pin installed on the main plate via a Hinobura wheel spring, and an upper part of the Hinobara wheel supported at one end; a gear train disengagement lever cross-sectionally actuated by the correction transmission lever;
The correction transmission lever has an elongated hole formed at a location, a rotation center hole, a correction pawl, and a correction pawl spring, and a pin that engages with the elongated hole, and the correction transmission lever is rotated via this pin. A timepiece with an hour hand adjustment mechanism comprising a correction lever and a correction cam that is rotated by the correction claw and integrally formed with the correction wheel via a ratchet, which is rotated by the correction claw and directly meshes with the hour wheel.