JPS6335431Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mechanism for sealing an adjustment hole formed in a case in order to appropriately adjust the capacitance of a trimmer capacitor that constitutes a timepiece circuit.

Conventionally, the case has holes for speed and speed.
After completing the assembly of the clock mechanism, a speed adjustment jig such as a screwdriver is inserted through the speed adjustment hole to adjust the speed and speed of the trimmer capacitor. After this adjustment is completed, a sticker is pasted to prevent dirt from entering the case through the adjustment hole. In this conventional method, the seal must be attached after the clock mechanism is completed, and since the size of the seal is relatively small, tools such as tweezers must be used. Therefore, the work was troublesome. Furthermore, after a sticker has been pasted on the adjustment hole, the sticker must be removed when adjustment is to be made again. At this time, the peeled sticker may become unusable due to a decrease in adhesive strength or damage caused when it is peeled off. Therefore, if the seal cannot be reused after the dealer or the user has made the adjustment, the adjustment hole will be used in an open state, and as a result, dirt will be removed from the adjustment hole. entered the inside of the case, causing a drop in time accuracy.

The present invention was made in order to solve the above-mentioned conventional problems, and its purpose is to provide a sealing mechanism that allows the adjustment hole provided in the case to be sealed by operating the watch function correction mechanism. be.

In order to achieve this purpose, the present invention includes a speed adjustment hole bored in the case for speed adjustment of the trimmer capacitor in the case, a sealing plate movably arranged near the speed adjustment hole, and a clock. It is composed of a function correction mechanism and an operating member provided on the timepiece function correction mechanism, and the sealing plate is arranged to overlap with the adjustment hole when a non-watch function is corrected, and is moved to a non-overlapping arrangement when a watch function is corrected. It is characterized by

The present invention will be described in detail below based on an embodiment of the present invention shown in the drawings.

FIG. 1 shows an embodiment in which the present invention is applied to a second hand stop mechanism, and a well-known timepiece wheel train is constructed between the case 2 and the main plate 4, although not shown.
A second hand stop mechanism 10 that is pivotably supported by the case 2 and the main plate 4 is disposed near the second hand wheel 6 constituting the timepiece wheel train, and a trimmer capacitor 12 is installed near the second hand stop mechanism 10. circuit board 14
is located. Further, as shown in FIG. 2, the case 2 is provided with a protrusion 3 projecting therein for holding the sealing plate 20 in a predetermined position.

The second hand stop mechanism 10 includes a stop lever 16 that can come into contact with and separate from the second hand wheel 6, an operating member 18 that projects to the outside of the case 2, and a speed adjustment hole 2a that is bored in the case 2.
The sealing plate 20 is composed of a sealing plate 20 that can be polymerized. The stop lever 16 has elasticity, and the second hand wheel 6
It is possible to stop the second hand wheel 6 by appropriately relaxing the pressing force on the second hand wheel 6. The operating portion 18 passes through a long hole 2b bored in the case 2, and can swing within the longitudinal range of the long hole 2b. Also, the second hand stops.
0, one end is locked to the protrusion 2c of the case 2,
An elastic member 22 whose other end is engaged with the sealing plate 20 is attached, and the biasing force of the elastic member 22 allows the sealing plate 20 to seal and hold the adjustment hole 2a.

In the illustrated embodiment, the elastic member 22 is used as a means for continuously sealing the adjustment hole with a sealing member, but other means may include means using an engaging structure of a concave portion and a convex portion. good. Next, the effects of the present invention will be explained.

FIG. 2 shows a state in which the watch wheel train is operating normally, with the second stop lever 16 being held in a predetermined position and the adjustment hole 2a being completely sealed by the sealing plate 20. It has been stopped.

FIG. 3 shows a state in which the operating member 18 is rotated in the direction of arrow A against the elastic force of the elastic member 22 and the second stop lever 16 is brought into contact with the second hand wheel 6 to stop the second. be. In this state, the trimmer capacitor 12 is visible through the adjustment hole 2a, and therefore, a adjustment jig such as a screwdriver can be inserted through the adjustment hole 2a to adjust the trimmer capacitor 12 appropriately.

In the illustrated embodiment, the sealing plate 20 is integrally formed with the operating member 18 of the second hand stop mechanism, but the sealing plate 20 may be constructed as a separate body as long as it is interlocked with the operating member 18. Further, the operation member 18 for interlocking the sealing plate 20 may be an operation member for a seconds return mechanism, a time adjustment mechanism, a reference setting mechanism, or a starter other than the seconds stop mechanism 10. That is, during normal use, the operating member and the sealing plate interlocking with the operating member are held in a predetermined position,
If the adjustment hole is sealed by this, the same effect as the illustrated embodiment can be obtained.

As explained above, according to the present invention, the adjustment hole in the case is normally sealed by the sealing plate disposed inside the case by the operation of the operating member included in the watch mechanism. , the adjustment hole can be opened when the operating member is moved in a predetermined direction. Further, since the sealing plate can be constructed integrally with the operating member normally included in the timepiece mechanism, a seal for sealing is not required. Therefore, the number of parts can be reduced compared to the conventional method, and thereby the process of sealing the adjustment hole can be reduced. Furthermore, it is possible to provide a sealing mechanism for the adjustment hole that is extremely effective in practical use, such that the sealing member will not be damaged no matter how many times the adjustment hole is opened and closed.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the present invention, FIG. 2 is a plan view showing a state in which the adjustment hole is sealed, and FIG. 3 is a plan view showing a state in which the adjustment hole is opened. 2... Case, 2a... Adjustment hole, 10... Second hand stop mechanism, 12... Trimmer capacitor, 18...
...operation member, 20... sealing plate, 22... elastic member.

Claims (1)

[Scope of utility model registration request] A speed adjustment hole drilled in the case for speed adjustment of the trimmer capacitor in the case, a sealing plate movably arranged near the adjustment hole, a clock function correction mechanism, and the clock function correction mechanism. and an operating member provided on the adjustment hole, wherein the sealing plate is arranged to overlap with the adjustment hole when a non-watch function is adjusted, and is moved to a non-overlapping position when a watch function is adjusted. Sealing mechanism.