JPS592552Y2 - Correction mechanism in watches, etc. - Google Patents

Description

[Detailed description of the invention] This invention uses two springs with different spring pressures to keep the movement of the correction mechanism constant regardless of the length of the correction stroke. It is.

As shown in FIG. 1, in a conventional mechanism of this type, a starter cone 3 located between a base plate 1 and a rear case 2 is fixed integrally with a correction shaft 4, and the operating distance l of the starter cone 3 is fixed. is constant, and from the positional relationship with the move star 5 and the idle gear 6, this operating distance l
cannot be varied, and therefore the correction shaft stroke is limited to the operating distance l.

The present invention has been devised in view of these points, and its contents will be explained below with reference to the illustrated embodiments.

Reference numeral 10 denotes a correction shaft into which a starter cone 11 is loosely fitted, and is D-cut 12 so that the starter cone 11 does not freely rotate independently with respect to the correction shaft 10.

A first correction spring 13 is located between the head 14 of the starter cone 11 and the base plate 15 and is wound around the correction shaft 10, and its spring pressure causes the bottom 16 of the starter cone 11 to move against the stop surface 18 of the rear case 17. I am forced to press down.

The stroke between the head 14 and the base plate 15 at this time is Sl.

19 is the inner hole 20 of the starter cone 11 and the correction shaft 10
A second correction spring is wound around the correction shaft 10 and the correction shaft 10 is connected to the four stop faces 23 of the rear case 17 via the first retaining ring 22 due to the spring pressure. Being forced to press down.

At this time, the bottom part 16 of the starter cone 11 and the flat washer 21
The stroke between is S2.

The relationship between the spring pressures of the above-mentioned first and second correction springs 13 and 19 is as follows.

That is, when the correction spring 13 is installed, the spring pressure is greater than the correction spring 19.
The maximum spring pressure 24 is the second retaining ring fixed to the correction shaft 10, and the stroke S with the stop outer surface 25 of the rear case 17 is 5-81+82.

26 is an idle gear, 27 is a starter, and 28 is a correction kana.

Next, the operating mode of the mechanism of the present invention, which has a diagonal configuration, will be explained.

When the correction shaft 10 is pulled in the direction of the arrow A, the correction spring 19 is first compressed, and the flat washer 21 moves in the same direction as the correction shaft 10 by a stroke S2, and the bottom 1 of the starter cone 11
6.

When the correction shaft 10 is further pulled in the same direction, the flat washer 21 applies an acting force to the starter cone 11, compresses the correction spring 13, and moves the starter cone 11 in the direction of arrow B.

The movement is a stroke S1 until the head 14 comes into contact with the base plate 15.

At this time, the retaining ring 24 of the correction shaft 10 comes into contact with the stop outer surface 25 of the rear case 17 and functions as a stopper.

At this point, the correction pinion 28 and the idle gear 26 are engaged, so the correction shaft 10 can be rotated as appropriate.

On the other hand, the starter 27 is deflected by the starter cone 11.

After adjusting the time, when you let go of the adjustment shaft 10, the adjustment spring 13°19
Due to the return elastic force of the starter cone 11 and correction shaft 1
0 moves in the direction of arrow C and returns to the original position.

During this return movement, the starter 27 returns to its deflection angle and is started.

Therefore, the present invention has a structure and function similar to that of an inclined top. Especially when adjusting the time, when the correction shaft 10 is pulled out, the correction shaft 10 moves between the base plate 15 and the rear case 1.
Since it is supported between two points with the starter cone 7, it is pulled out in parallel with the starter cone 11 without tilting, and as a result, the correction shaft 10 is not affected by eccentricity or shaft vibration, and the correction pinion 28 and the idle gear 26 are The first correction spring 13 can be reliably engaged with the starter cone 11.
A second correction spring 19 is provided between the head 14 of the starter cone 11 and the base plate 15, and a second correction spring 19 is provided between the inner hole 2 of the starter cone 11.
0 and the first retaining ring 22, the correction shaft 10
When pulled out, the first retaining ring 22 comes into pressure contact with the starter cone 11 and the head 14 comes into contact with the base plate 15, and the starter cone 11 becomes integral with the correction shaft 10, and the correction pinion 28 and the idle gear 26 can be smoothly connected and rotated, and furthermore, by using the first correction spring 13 and the second correction spring 19, the spring coefficient of the first correction spring 13 can be made larger than the spring coefficient of the second correction spring 19. Therefore, the stroke of the correction shaft 10 can be freely and variably set easily.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the prior art, and FIG. 2 is a vertical sectional side view of the main parts of the mechanism of the present invention. 10... Correction shaft, 13.19... Correction spring, 26... Idle gear, 28...
・Corrected kana.

Claims (1)

[Scope of utility model registration request] A correction shaft 1 is provided between the base plate 15 and the rear case 17.
0, and a starter cone 11 is attached to the correction shaft 10.
is fitted loosely and the first correction spring 13 is wound around the correction shaft 10 between the head 14 of the starter cone 11 and the base plate 15, while the second correction spring 1
9 is wound around the correction shaft 10 between the inner hole 20 of the starter cone 11 and the first retaining ring 22, and the spring coefficient of the first ρ correction spring 13 is set to the spring coefficient of the second correction spring 19. Correction mechanism for larger watches, etc.