著者

池上 敏正 守屋 達雄 牛越 健一

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.108, pp.30-41, 1984-03-25 (Released:2017-11-09)

---

An anologue quartz timepiece, Cal. 7A28, the first Analogue Quartz Chronograph in the world, is reported here, which is operated by four independent driving motors. Cal. 7A28 is an Analogue Quartz Chronograph with the improved levels in time measuring efficiency, time accuracy, reliability, and maintenance, and also is an analogue quartz timepiece including complicated and multiple functions. In this paper, the operating performance, structure of the movement, and the electronic circuit are discussed in connection with the fine mechanism and the microelctronics. This paper may serve to promote analogue quartz timepieces equipped with multiple functions.

著者

小滝 富雄 沢村 洋

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.51, pp.46-73, 1969-09-25 (Released:2017-11-09)

著者

堤 一郎

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.153, pp.91-95, 1995

著者

金坂 俊哉 小棚木 進 中林 靖 間峠 彰弘

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.43, no.3, pp.29-36, 1999-09-10 (Released:2017-11-09)

被引用文献数

1

---

This paper describes the development of a thermal energy watch. The Cal. 6C is the thermal energy watch that converts body heat into power. The watch has an ultra compact power generation system with a power generation monitoring function and a power saving function that gradually stops the hands when no power is generated. It also has a fully automatic perpetual calendar function valid through February 28, 2100.

著者

吉田 倫幸

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.46, no.2, pp.1-9, 2002-06-10 (Released:2017-11-09)

参考文献数

13

被引用文献数

1

著者

小林 広美

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.58, no.210, pp.24-33, 2014-06-10 (Released:2017-11-09)

著者

吉澤 弘

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.58, no.211, pp.39-41, 2014

著者

小平 光治 後藤 光浩 池田 勝幸 小松 秀敏

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.99, pp.30-40, 1981

---

The musical alarm clocks and watches appeared about three years ago. Recently, more than lO,OOO,OOO pcs digital watches with musical alarm function are produced annually all over the world. The reason of this prosperity is that musical alarm fits more for young people's sensitivity than beep sound alarm. For there market requirements, we have developed musical chips which play comfortable melodies automatically and can be driven by low voltage source. In the process of developing them, we examined from many viewpoints such as low power supply, low current consumption, dignity of sound and frequency limits. Then we have obtained an efficient linear amplifier and excellent melody generation system.

著者

高橋 智宏

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.156, pp.1-9, 1996

---

Two methods are well known to drive an EL lamp for a watch. One is a self-oscillation circuit using a transformer, the other is a driver IC equipped with a charge-up coil. The merits of a self-oscillation circuit are to be simple and easy to get brightness. However, the mounting area is larger and the cost is higher. The purpose of development of the EL Driver IC is to make smaller the mounting area and the lower cost. In practice, a charge-up coil both for EL and for buzzer is used in the EL Driver IC. (This Driver IC also includes buzzer driver.) Wrist watch bilt-in this driver IC has been produced on the commercial basis. Hereafter we will promote the EL technology as a regular function of digital quartz watch.

著者

今井 嘉文 竹原 俊二 常山 靖

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.56, pp.38-50, 1970-12-10 (Released:2017-11-09)

著者

苗村 潔 齋藤 英也

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.49, no.193, pp.38-44, 2005

参考文献数

16

被引用文献数

3

---

Epidural anesthesia is one of the regional anesthesias used for the abdominal surgery and the obstetric analgesia for labor. An anesthesiologist need to place the needle tip at the epidural space precisely, according to decrease of the puncture force when the needle tip enters in the epidural space. No study examined the relation between the tip shape and the force curve. In this paper, six needles were compared by a phantom study.

著者

川島 宏文 中里 光弘

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.149, pp.21-32, 1994

---

This paper describes new cuts for torsional mode quartz crystal resonators, which are designated "TT-Cut" classified into "TT(X_1)-Cut" and "TT(X_2)-Cut". The objective of this paper is propose a new cut for torsional quartz crystal resonators and to clarify its frequency characteristics, frequency temperature behavior and electrical equivalent circuit parameters. First, a frequency equation of a resonator vibrating in torsion is shown. Since a torsion problem is equivalent to solving a torsional rigidity C_t, the derivative procedure of C_t is described in detail. The calculated results are then compared with the measured data of tuning fork-type, so that the present resonators are found to be successfully obtained with a frequency of about 400kHz and the second order temperature coefficient β of approximately one third of the flexural quartz crystal resonators.

著者

赤尾 祐司

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.45, no.1, pp.27-33, 2001

参考文献数

2

---

With the purpose of improving performance of lubricant at low temperature and unifying lubricants to be used, we made new synthetic lubricant for watch mechamism. In this paper, we selected ester oil among several kinds of synthetic oils. We found that ester, as base oil, was superior in performance at low temperature and cahracteristic of evaporation rate, which has three ester groups in one molecule synthesized with tri-methylopropane and alkyl acid. We defined that the viscosity of the above mentioned lubricant should be 15cSt to 1000cSt at its used temperature range(-30 to 80°C). We found by evaluating performance of watches that the consumption electric current and the voltage to start moving with the lubricant at the used temperature are both almost same as with the existing lubricants. We also found by evaluating durability by accelerating test that the performance of the train wheel movement for twenty years is almost same. From the above we can obtain the new lubricant for watches which is superior in performance at low temperature and which we can apply for every part in watches.

著者

小牧 昭一郎

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.46, no.1, pp.67-75, 2002

被引用文献数

1

---

本稿では立等時性に関するもっとも知られている二つの事項、てんわの片重りとひげぜんまいの重心移動に関して解説を行なった。ここでひげぜんまいの重心移動とはテンプの振動に伴って発生するものをいい、ひげの取付具合による偏心などを意味するものではない。ひげぜんまいの重心移動に関しては観察者の目をひげ玉に乗せたとして新しい説明を試みた。また、ひげぜんまいの重心移動の軌跡に関しては新しい、正確な考え方を紹介した。偏心の取れた正確なひげぜんまいの重心点は静止位置にあってもてん真軸上にはない。これを直接ひげ内端点から外端までのひげ全体の重心点計算と、ひげ玉内部に仮想できるいわば切り取られたひげぜんまいの重心点の位置の計算から明確にした。

著者

小牧 昭一郎

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.54, no.202, pp.1-10, 2010

参考文献数

4

---

The movement of point of gravity of hairspring is so known as the one as far as of it's central area which will cause the vertical positional error at the amplitude 220° in vertical positions, has been once resolved with the famous condition known as the Phillips condition written in 1860 by Edouard Phillips. But it's mathematical formula has not been translated into a helpful form for the actual practice of adjustment of internal curve shape, and has not contributed for the improvement of actual adjustment of vertical positional errors. Then, as the consequence, we have not yet been informed any new researches about this area in these 150 years. Thus the actual method of adjustment of shape of internal curve of hairspring has been long lead with arbitrary ways, almost no method. In this report here is presented the new understanding and the adaptation of the theory above for Archimedes curves used in modem watches. Furthermore here are shown very precise results of adjustment of internal curve of hairspring by following the method in this report. The maximum positional error at 220° amplitude reached to 1.3s/day in case of gentle wrist watches tried here.