Electronic clock having non-contact data communication function, and non-contact data communication system

Abstract

The present invention relates to an electronic watch (100) having a contactless data communication function. The case (101) of the electronic watch is constructed from metal or other conductive material, and is formed in an annular shape with a dial-side opening (101A) and a back-side opening (101B). A gap (101G) is disposed to one part of the case (101) in the circumferential direction as an insulation part, and an insulation material (109) is located and fixed inside this gap (101G). Because the occurrence of an eddy current can thus be prevented, a drop in communication function can be suppressed even though an annular conductive member is used in the case or other structural parts. Furthermore, because the strength of the case can be improved and the seal or water resistance can be easily assured, the reliability of the electronic watch can be increased.

Description

technical field [0001] The present invention relates to an electronic timepiece with a non-contact data communication function and a non-contact data communication system. Background technique [0002] Magnetic cards, such as telephone cards and various credit cards, loyalty cards issued by various retail stores, highway cards for highways and other cards for a wide range of uses have become widespread. However, it has become a social problem due to its danger of being easily counterfeited. Therefore, from the viewpoint of preventing counterfeiting, IC cards are increasingly popular in order to protect personal confidential information, increase storage capacity, and the like. [0003] However, even with an IC card, since it is necessary to contact the read / write device for data input / output, when a transaction is performed, that is, when reading / writing data from the IC card, the IC card must be handed over to the IC card. To the other party or insert the read-write devic...

AI Technical Summary

Problems solved by technology

[0006] But in the watch of described existing built-in non-contact IC card function, owing to disposing antenna in the casing, its casing must be made with insulating material, and can not use the casing material as wristwatch in the past and frequently used Conductive materials such as metal materials, so the appearance design is greatly restricted, especially the lack of high-end sense and the lingering impression of cheap products

[0007] In addition, even if an insulating material is used as the case, if a conductive material is installed inside and outside the case, eddy currents (circular currents) may be generated in the conductive material by radio waves emitted from the outside or by the watch itself. , the energy loss caused by this eddy current will lead to deterioration of communication characteristics (for example, shortening of communication distance)

Therefore, there is a problem that it is impossible to install a rotating bezel or a bezel outside the case, or to install ring-shaped conductive parts such as a dial or a middle frame inside the case.

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