JPS5922549Y2 - Clock train structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a front wheel train for a battery-powered wristwatch, and aims to save labor in the battery-powered wristwatch.

In recent years, analog quartz wristwatches have shown remarkable progress in becoming thinner, smaller, and with longer battery life.

However, in analog crystal wristwatches that are designed to be thin and compact, the space occupied by the battery is limited, forcing the use of batteries with a small capacity, making it difficult to extend the life of the battery.

Therefore, it is necessary to replace the battery in a troublesome manner, which places a heavy burden on the consumer.

For this reason, the effects of improvements in batteries and increased efficiency in circuits and motors are already beginning to appear.

However, it can be said that there is almost no way to reduce the load on the front wheel train.

As shown in Figure 1-a, l), the conventional front wheel train consists of the hour wheel 7, the rear wheel 8, and the small iron wheel 9 that make up the front wheel train, and the calendar wheel train. 12 intermediate cars, 1 calendar car
3, and the bearing method of these wheels rotates around each pin cut out from the base plate 1, and each shaft diameter is φ0.4 mm or more.

Furthermore, each car is held down almost all around its upper and lower surfaces by the main plate 1 and backing work 19 that determine its agitation.

Further, in a non-calendar wristwatch, the time of the hour wheel 7 is determined by interposing the dial washer 20 between the dial plate 3 and the hour wheel 7.

Furthermore, as shown in the figure, there is a gap between the cylindrical pinion 4' and the hour wheel 7, but depending on variations in related parts, the weight of the hour wheel 7 and the spring force of the dial washer 20 may cause a load on the cylindrical pinion 4'. It takes.

Therefore, the losses due to each of the above-mentioned load torque, low temperature environment, and watch oil are extremely large, and in order to increase the reliability of the watch, it is necessary to
It is necessary to increase current consumption and drive torque of the motor, making it impossible to extend the life of the battery.

The present invention solves the above-mentioned drawbacks and makes it possible to extend the life of the battery of a thin and small battery watch by using the bearing method for each wheel of the front wheel train as shown below. , 3rd
An embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a sectional view showing the date wheel train of a two-hand non-calendar quartz wristwatch.

Reference numeral 1 is the main plate, which has a pilot hole stone that supports the lower handle of each car that makes up the front wheel train and the front wheel train.
It has a bushing 18 made of an elastic member for the purpose of positioning and fixing with.

Reference numeral 2 is a bridge, which is fixed to the main plate 1 as is well known (not shown), and has a surface exposed at the top of the front side of the main plate 1, and has a bridge 8, a small iron car 9, a third wheel 6, etc. Front gear train (excluding second wheel)
It has an upper hole stone that supports the upper shaft of the wheel, and a second axle 11 that supports the second wheel and pinion is installed.

This allows the distance between the upper and lower holes that support each car to be longer,
I would like to add that this is an essential condition when trying to make the car thinner because it allows the tilt of each car to be smaller.

3 is a dial and has a hole stone 22 that supports one side of the hour wheel 7 and a dial stabilizer 17.

The main plate 1 and the dial plate 3 are fixed by fitting the bushing 18 and the dial plate stabilizer 17 in the radial direction.

4 is the second pinion with the minute hand 14 fixed to the tip, and 5 is the second gear, which forms the second wheel, and when the hands are moving normally, they are integrated.
When setting the hands, the second gear 5 is made to hit the second pinion 4 so as to slip and rotate.

The second wheel is arranged on the front side of the main plate 1, and the upper handle 11 of the second axle
A, the lower handle 11b is supported by the shaft as shown in the figure.

Further, the clearance of the second wheel is determined by the pilot hole stone 21 and the collar of the second wheel axle 11.

6 is the third wheel, and the relationship from the third wheel to the rotor is as follows.
Since this is the same as the conventional one, the explanation will be omitted.

7 is an hour wheel, which is arranged on the back side of the main plate 1, and hour hand 15.
, and both ends of the cylindrical gear 7a (the outer diameter of the hour wheel 7) are supported by the dial plate 3 at one end and by the base plate 1 at the other end.

This hour gear 7a is prevented from coming into contact with the main plate 1 and dial 3 as shown in the figure by upper and lower hole stones 22 and 21 pushed into the dial 3 and main plate 1.

Also, since the agitation of the hour wheel 7 is determined by the upper and lower hole stones 22 and 21, a dial washer is not necessary.

Furthermore, the relationship between the hour wheel 7 and the second pinion 4 is such that they do not come into contact with each other in the direction perpendicular to the plane of the main plate 1 by a pilot hole stone 21, and a gap m is provided in the direction parallel to the plane of the main plate 1. Therefore, they do not come into contact with each other.

8 is the hour wheel, and the hour wheel 7 is engaged with the hour wheel 7.
and the rear gear 8 meshing with the second pinion 4 and the small iron wheel 9.
b. It is composed of a lower handle 8C1 which is supported by the main plate 1 between the Japanese back kana 8a and the Japanese back gear 8b, and an upper handle 8d which is supported on the receiver 2. Pattern 8
It has d.

Further, the back half of the day 8a and the second half of the day gear 8b are fixed to each other by a shimshiro, and are rotatably incorporated into the main plate 1.

Furthermore, as can be seen from the figure, the Japanese back kana 8a and the Japanese back gear 8b
are designed so that they do not touch the dial 3 and main plate 1, respectively.
The rear gear 8b is arranged on the front side of the main plate 1, and the rear Japanese kana 8a is arranged on the back side of the main plate 1.

9 is a small iron car, and the lower handle 9a and upper handle 9b are the main plate 1 and the receiver 2, respectively.
As can be seen from the figure, the upper and lower handles 9
The parts other than a, 9b and the body attachment part 9C are not in contact with the main plate 1 and the receiver 2.

Therefore, by supporting the wheel train (front wheel train), which rotates in one direction during normal hand movement and rotates in the opposite direction when setting the hands, by supporting both handles as described above, torque loss in the front wheel train can be reduced. can be made as small as possible.

10 is a Tsuzumi wheel, which is supported by a base plate 1 and a support 2.

In this embodiment, the upper hole stone 22 is fixed to the center hole of the dial, but if there is sufficient space, back pressing can also be used. It is called a machine frame.

Figure 3 is a cross-sectional view showing the calendar wheel train of a layered analog quartz wristwatch, and the front wheel train (also possible with the conventional three-hand middle).
, and the sun wheel train shown in FIG. 2 are used, so their explanation will be omitted.

Reference numeral 7 denotes an hour wheel, and both ends of the cylindrical gear 7a (the outer diameter of the hour wheel 7) are supported by a backing 19 at one end and by the base plate 1 at the other end.

Also, the cylindrical gear 7a is prevented from coming into contact with the main plate 1 and the back press 19 as shown in the figure by the upper and lower hole stones 22 and 21 pushed into the back press 19 and the main plate 1, Lower hole stone 2
It is determined by 2.21.

Furthermore, the relationship between the hour wheel 7 and the second pinion 4 is the same as that shown in FIG.

Reference numeral 12 denotes an intermediate wheel, which has an intermediate gear 12a meshing with the hour wheel 7 and an intermediate pinion 12b having both handles, both of which are integrally formed with a shim.

As can be seen from the figure, the intermediate wheel 12 is supported on one side by the main plate 1 and on the other by a support 2, and this bearing part is supported by the intermediate pinion 1.
Located on the front side from 2b, intermediate gear 12a, intermediate pinion 1
2b are both arranged on the back side of the main plate 1.

Furthermore, the clearance of the intermediate wheel 12 is determined by the contact portion 12C on the back side of the intermediate pinion 12b, the upper hole stone contact step portion 12d, the receiver 2 and the back pusher 19, and the contact portion with the back pusher 19. The diameter of 12C should be as small as possible (φ0.5 mm or less).

Reference numeral 13 denotes a date wheel, which is composed of a date feed gear 13a that meshes with a surveying pinion 12b, and a date feed pawl 13b that is integrated with the date feed gear 13a.

It can be clearly seen from the figure that the guide wheel 13 is also provided with bearings and backlashes in the same way as the intermediate wheel 12.

The intermediate gear 12a, intermediate pinion 12b, index gear 13a, and date indicator pawl 13b, which are the components of the intermediate wheel 12 and date indicator 13, are designed not to come into contact with the base plate 1 and the back pusher 19.

Further, the intermediate wheel 12 and the index wheel 13 rotate in one direction during normal hand movement, and are capable of forward and reverse rotation during hand alignment.

14 is a mouthpiece. As described above, the present invention is capable of reducing torque loss in the front wheel train and sufficiently extending the life of the battery by having multiple handles on the cars that make up the front wheel train. That is.

In the embodiment of this invention, upper and lower hole stones were used, but
If the bearing member has a solid lubricating effect, there will be no discoloration of the dial due to oil flow.

Alternatively, instead of using upper and lower hole stones, handle holes may be provided in the main plate, bridge, and dial plate to support each wheel.

Although FIG. 3 shows a date clock, the same applies to a date/day clock.

[Brief explanation of the drawing]

FIG. 1-a is a sectional view showing a conventional train wheel. FIG. 1 is a sectional view showing a conventional calendar wheel train. FIG. 2 is a sectional view of the date wheel train of a two-hand non-calendar quartz wristwatch showing an embodiment of the present invention. FIG. 3 is a sectional view of a calendar wheel train of a date analog quartz wristwatch showing another embodiment of the present invention. 1... Main plate, 2... Uke, 3...
・Dial board, 4... Second kana, 5... Second gear, 7... Hour wheel, 8... Hint wheel, 9. ...Small iron car, 11...Second axle,
12... Intermediate car, 13... Day transport car, 1
9... Back pressing work, 21... Lower hole stone, 22
・・・・・・Kamianaishi.

Claims (1)

[Scope of utility model registration request] A main plate has a receiving plate on one side and a machine frame on the other side, a front gear train is arranged between the main plate and the receiving plate, a front gear train is arranged between the main plate and the front machine frame, and At least one of the gears constituting the front gear train has a lower handle part disposed above the gear part and pivotally supported by the base plate, an upper handle part penetrating the base plate and pivotally supported by the receiving plate, and a receiver. It has a contact step part that comes into contact with the plate bearing part to determine the axial position of the gear, and a contact part that protrudes above the gear and faces the machine frame and serves as a perpendicular contact, and the gear diameter A wheel train structure for a timepiece, characterized in that the lower handle diameter and the upper handle diameter are formed so as to be sequentially smaller in diameter.