JPS62255888A - Sub-hand display timepiece - Google Patents

Abstract

PURPOSE:To enable the easy change of a sub-hand display position with the exchange of a small number of parts by providing guide structures for a sub- hand wheel to plural positions where the sub-hand wheel engages with an intermediate wheel. CONSTITUTION:The turning of an hour wheel 1 to which an hour hand to display the ordinary time is reduced in speed by half and is transmitted to the sub-hand wheel 3 via an intermediate gear 2b of the intermediate wheel 2, an intermediate pinion 2b in a clutch mechanism to make relative turning when exerted with more than specified torque, an intermediate transmission wheel 2c. The hand of the sub-hand wheel 3 functions as the 24hr system hand. A correcting wheel which is similar to the sub-hand wheel 3 and has no sub-hand is mounted in place of said sub-hand wheel 3 and the sub-hand wheel 3b is mounted to a hole 8a of the guide structure provided to the base metal at the same distance as the distance up to the central position of the sub-hand wheel 3 relative to the intermediate wheel 2, then the 24hr display by the sub- hand is similarly executed and the correction of the sub-hand by a winder 5 is also possible. The sub-hand display position is thereby easily changed with the exchange of a small number of parts.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the layout of a sub-hand display timepiece.

[Prior Art] Conventionally, as shown in FIG. 1 and PJS5 of Japanese Patent Application Laid-Open No. 59-73788, there has been known a sub-hand display timepiece in which the presence or absence of a sub-hand display can be selected. was. Furthermore, there has been known a sub-hand display timepiece in which the sub-hand display position is changed by rotating and fixing the movement relative to the dial.

[Problems and objectives to be solved by the invention] However, the tastes of consumers these days are diversifying.

Not only watches with a secondary hand display that have only one secondary hand, but also a date hand and
There is a demand for a multi-secondary hand display watch that simultaneously shows various displays such as the day hand, 24-hour button, and moon phase display. For watches with multiple sub-hand displays, many models with different display combinations are required from a functional and design standpoint. On the other hand, although it is possible to select the necessary functions by simply checking whether the secondary hand is displayed or not, it is not possible to display it in a position that suits each model due to the design. ,
Since the other secondary hands and crown positions also rotate at the same time, it is not only impossible to create a model with a good design, but also the operability of hand setting etc. becomes poor. Furthermore, since there are many models, the demand for each one is small, and from a cost perspective, each model must be accommodated by changing as few parts as possible.

SUMMARY OF THE INVENTION The present invention is intended to solve these conventional problems, and its purpose is to provide a variety of multi-side hand display timepieces that are low in cost and excellent in functionality and design.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the sub side display timepiece of the present invention has an hour wheel for fixing the hour opening for displaying the normal time in the center, and In a sub-hand display watch, the sub-hand display clock has a sub-hand type for displaying a different time from the normal time, and an intermediate wheel for transmitting the rotation of the hour wheel to the sub-hand type. The secondary needle type guide structure is present at a plurality of positions where the needle wheel engages with the intermediate wheel, and the position of the secondary needle type can be arbitrarily selected.

[Example〕 Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a plan view of a movement showing one embodiment of the present invention.Although not shown in the drawing, the hour hand is fixed to the hour wheel 1, and the sub-hand is fixed to the sub-hand type 3. The intermediate wheel 2 has a four-piece structure including a middle III gear 2a, an intermediate pinion 2b, an intermediate transmission wheel 2c, and an intermediate wheel seat. The intermediate transmission wheel 2C and the intermediate wheel seat are fixed to the intermediate pinion 2b with the intermediate gear 2a sandwiched therebetween. The intermediate gear 2a is engaged with the intermediate pinion 2b by a jumper spring.

The intermediate wheel 2 has a ratchet that rotates relative to the intermediate gear 2a and the intermediate pinion 2b when a torque of a certain level or more is applied to the intermediate gear 2a and the intermediate pinion 2b.

Next, the operation of this embodiment will be explained. 1 In the normal hand movement state, the rotation of the hour wheel 1 is transmitted to the intermediate gear 2a. At this time, since no torque is applied to activate the clutch mechanism of the intermediate gear 2, the intermediate transmission wheel 2C also rotates together with the intermediate gear 2a. The intermediate transmission wheel 2C meshes with the auxiliary needle gear 3a, and the auxiliary needle die 3 also rotates.

At this time, by setting the reduction ratio from the hour wheel 1 to the sub-needle type 3 to 2, the sub-needle type 3 is in a 24-hour display. When adjusting the secondary hand independently without changing the display of the 1 hour hand,
When the 9 o'clock winding stem 5 is moved backward, the spring force of the bolt 6 causes the wheel 7 to move backward together with the 9 o'clock winding stem 5, and the secondary needle kana 3b
engage with. Now, if you rotate the 9 o'clock winding stem 5 left and right,
The sub-button wheel 3 also rotates in forward and reverse directions. The intermediate transmission wheel 2C meshes with the auxiliary gear 3a and rotates, but the clutch mechanism of the intermediate wheel 2 works, so the hour wheel 1 does not rotate.

The positional relationship between the six 8a of the main plate 8, the intermediate wheel 2, and the sub needle type 3 is as follows:
The meaning of the hole 8a having the same center distance with the hole 8a will be explained with reference to FIG.

In Figure #52, the secondary needle type 3 in Figure 1 is reassembled into the correction wheel 4.
Although not shown in Figure 0, which is a plan view of the movement when the new sub-needle type 3' is installed in the hole 8a of the main plate 8, the sub-needle is fixed to the sub-needle type 3'. The auxiliary needle type 3 and the correction wheel 4 differ only in the presence or absence of the auxiliary needle attachment portion. The auxiliary needle gear 3a' has the same tooth profile as the correction gear 4a, and when the 0M hand is engaged with the intermediate transmission wheel 2C, the auxiliary needle gear 3a' and the correction wheel 4 are the auxiliary hook wheel 3 in Fig. 1.
Similarly, it rotates once in 24 hours. When correcting the secondary needle alone, the correction wheel 4 is driven by the gear wheel 7, as shown in Fig. 1, and the secondary needle type 3° is corrected in both forward and reverse directions via the intermediate transmission wheel 2C. As shown, the sub-needle type 3 in Fig. 1 and the sub-needle type 3' in Fig. 2 differ only in the display position, but there is no difference in function.Also, the parts changed due to the change in the display position are changed to the modification car 4. The only new part is the 3° secondary needle type.

3(a), 3(b), and 3(c) show a sub-hand display timepiece using this embodiment. FIG. 3(a) is the case of FIG. 1 in which the 24-hour hand 11 is displayed on the 9 o'clock side from the center. The day hand is 12 on the 3 o'clock side.
This is an example in which a date hand 13 is added to the 6 o'clock side. Figure 3(b) shows the case of Figure 2 where the 24-hour hand 11° is displayed on the 12 o'clock side.
This is an example in which a date hand 13 is added to the 6 o'clock side. f53 diagram (C)
The 24-hour display wheel train and correction mechanism have all been removed, and only the date hand 13 is displayed on the 6 o'clock side. In this way, 2
Since it is possible to select the 4 o'clock position or the presence or absence of the 4 o'clock display, it is possible to develop many models with excellent designs, which can meet the diverse demands of consumers.

Until now, 1i'ill &+ which displays 24-hour time
As explained above, if the reduction ratio from the hour wheel to the sub-needle type is 1, a sub-hand that displays the time on the 12 o'clock side can be obtained. Furthermore, if the intermediate wheel is provided with a pawl that engages with the sub-button wheel only once a day, a sub-side for displaying the date, day of the week, age of the moon, etc. can be obtained.

[Effects of the Invention] As explained above, the present invention has the guide structure of the secondary needle wheel at a plurality of positions where the secondary wheel engages with the intermediate wheel.
The secondary display position can be easily changed by replacing a small number of parts.

[Brief explanation of drawings]

Fig. 1 is a plan view of a movement showing one embodiment of the present invention, Fig. 2 is a plan view of the movement when the secondary display position is changed from Fig. t51, and Fig. f53 is an external appearance of a watch to which each embodiment is applied. A plan view showing. 1... Hour wheel 2... Intermediate wheel 3... Secondary needle wheel and above Applicant Seiko Epson Corporation (α) (Ion Figure 3)

Claims (1)

[Claims] It has an hour wheel in the center for fixing the hour hand for displaying the normal time, and a sub-hand wheel for fixing the sub-hand for displaying a different time from the normal time in other than the center. In the auxiliary hand display timepiece having an intermediate wheel that transmits the rotation of the hour wheel to the auxiliary hand wheel, guide structures for the auxiliary hand wheel are present at a plurality of positions where the auxiliary hand wheel meshes with the intermediate wheel, and optionally A sub-hand display timepiece characterized in that the position of the sub-hand wheel can be selected.