JPS641655Y2

JPS641655Y2 -

Info

Publication number: JPS641655Y2
Application number: JP6974183U
Authority: JP
Priority date: 1983-05-10
Filing date: 1983-05-10
Publication date: 1989-01-13
Also published as: JPS59175189U

Description

【考案の詳細な説明】（技術分野）本考案は、携帯用時計の日の裏機構に関する。[Detailed explanation of the idea] (Technical field) The present invention relates to a date mechanism for a portable watch.

（従来技術） 12時制時計を24時制時計に変更するには、時分
針間の減速比を変えることにより行なわれ、具体
的には、第１図に示したように筒かな１と日の裏
車３、日の裏かな４と筒車２よりなる２組の歯数
比を変えることにより行なわれる。(Prior art) Changing a 12-hour clock to a 24-hour clock is done by changing the reduction ratio between the hour and minute hands. Specifically, as shown in Fig. This is done by changing the tooth ratio of two sets consisting of the wheel 3, the pinion pinion 4, and the hour wheel 2.

ところが、日の裏車３のモジユールを変えるこ
とは、それに噛合う小鉄車５、さらにはつづみ車
のモジユールまで変える必要があるほか、筒かな
１と日の裏車３の軸間距離をも変更しなければな
らないといつた大きな設計変更を意味する。 However, changing the module of the sun wheel 3 requires changing the module of the small iron wheel 5 that meshes with it, and even the module of the wheel wheel, as well as changing the distance between the axes of the tube pinion 1 and the wheel wheel 3. It means a major design change that has to be made.

特に、時計の薄型化が進んでいる近年において
は、つづみ車の径を可及的に小さくしているた
め、つづみ車の歯数を増す方向への変更はきわめ
て困難となる。 Particularly in recent years, where watches have become thinner and thinner, the diameter of the handwheel has been made as small as possible, making it extremely difficult to change the number of teeth on the handwheel.

（目的）本考案はこのような事情に鑑み、従来の時計ム
ーブメントにあまり大きな変更を加えることな
く、筒かなから筒車間の減速比を変更することの
できる改良された携帯用時計の日の裏機構を提供
することを目的とするもので、以下に本考案の詳
細を図示した実施例に基づいて説明する。(Purpose) In view of these circumstances, the present invention was developed to create an improved portable clock that can change the reduction ratio between the cylinder pinion and the hour wheel without making any major changes to the conventional clock movement. The details of the invention will be explained below based on the illustrated embodiments.

（構成）第２，３図は、24時制時計として構成した本考
案の一実施例を示すものであつて、第１図と対応
させて付した符号１１から１４は、時分針を１：
24の比率で回転させるために後述する伝え車２３
とは別に配設した日の裏輪列で、例えば歯数比が
１：４の筒かな１１と日の裏車１３及び、歯数比
が１：６の日の裏かな１４と筒車１２をそれぞれ
噛合わせることによつて、24分の１の減速比を達
成するようにしている。(Structure) Figs. 2 and 3 show an embodiment of the present invention configured as a 24-hour clock, and reference numerals 11 to 14 corresponding to Fig. 1 indicate hour and minute hands.
A transmission wheel 23, which will be described later, rotates at a ratio of 24.
In the rear wheel train arranged separately from the rear gear train, for example, the cylinder pinion 11 and the hour wheel 13 have a tooth ratio of 1:4, and the rear pinion wheel 14 and hour wheel 12 have a tooth ratio of 1:6. By meshing each of these, a reduction ratio of 1/24 is achieved.

ところで、上記した筒かな１１は、12時制を採
る通常の時計のものとおなじ歯数を持つ「かな」
として形成され、これにはまた、通常の日の裏車
と同じ歯数を持つ伝え車２３が、「第２の日の裏
車」として噛合つている。この伝え車２３は、さ
らに上記した日の裏車１３が占める平面と同じ平
面上に軸支されて（第３図）小鉄車１５と噛合
い、図示しないつづみ車からの回転を筒かな１１
に伝えるように構成されている。 By the way, the cylinder kana 11 mentioned above is a "kana" that has the same number of teeth as a regular clock that uses the 12-hour clock.
A transmission wheel 23 having the same number of teeth as a normal day reverse wheel is meshed with this as a "second day reverse wheel." This transmission wheel 23 is further pivoted on the same plane as the above-mentioned counter wheel 13 (Fig. 3), meshes with a small iron wheel 15, and transmits rotation from a not-shown wheel to the cylinder pinion 11.
It is structured to convey.

したがつてこの実施例によれば、小鉄車１５を
含む指針修正輪列に変更を加えることなく、筒車
１２と日の裏車１３を変えるだけで容易に24時制
の時計を構成することができる。 Therefore, according to this embodiment, a 24-hour clock can be easily configured by simply changing the hour wheel 12 and the hour wheel 13 without making any changes to the pointer correction wheel train including the small iron wheel 15. can.

（効果）以上説明したように本考案によれば、筒かなと
筒車との間に所要の回転比を付与する日の裏輪列
以外に、小鉄車の回転を筒かなに伝える伝え車を
配設したので、つづみ車、小鉄車、伝え車、筒か
なといつた裏回り輪列に影響を及ぼすことなく、
単に、筒車、日の裏車、日の裏かなの歯数比を変
えるだけで簡単に24時制等の時計を構成すること
ができる。(Effects) As explained above, according to the present invention, in addition to the rear wheel train that provides the required rotation ratio between the cylinder pinion and the hour wheel, there is also a transmission wheel that transmits the rotation of the small iron car to the cylinder pinion. Because it is arranged, it does not affect the rear wheel train such as the train wheel, small iron car, transmission car, and tube kana.
You can easily configure a 24-hour clock by simply changing the gear ratio of the hour wheel, hour wheel, and hour wheel.

[Brief explanation of drawings]

第１図イ，ロは、従来の12時制及び24時制時計
の輪列構成を示す図、第２図は、本考案に係る輪
列構成の一例を示す図、第３図は、第２図におけ
るＡ−Ａ線の断面図である。１，１１……筒かな、２，１２……筒車、３，
１３……日の裏車、４，１４……日の裏かな、２
３……伝え車、５，１５……小鉄車。 Figures 1A and 2B are diagrams showing the wheel train configuration of conventional 12-hour and 24-hour watches, Figure 2 is a diagram showing an example of the wheel train configuration according to the present invention, and Figure 3 is Figure 2. It is a sectional view taken along the line A-A in FIG. 1,11...tube kana, 2,12...hour wheel, 3,
13...The back of the day, 4,14...The back of the day, 2
3...Transmission car, 5,15...Small iron car.

Claims

[Scope of utility model registration request]

A rear gear train that provides the required rotation ratio is installed between the cylinder pinion and the hour wheel, while a transmission wheel corresponding to the hour wheel in a 12-hour clock is placed between the cylinder pinion and the small iron wheel. A date mechanism of a portable watch, characterized in that it is provided on the same plane as the date wheel.