Clock

Abstract

The present invention provides a clock which can obtain good reception sensitivity. An electric wave clock (1) comprises: a watch lens (110) with watch lens glass (112), a back cover (120) which is arranged opposite to the watch lens (110), a casing portion (130) which is used for connecting the peripheral edges of the watch lens (110) and the back cover (120), and formed by non-magnetic components, an antenna arranged at the space formed between the watch lens (110) and the back cover (120) and used for receiving standard electric wave with temporal information, a drive control circuit portion for setting time according to the temporal information of standard electric wave received by the antenna (200), and for controlling the operation of a indicating pointer (170), and a indicating pointer driven by a step-by-step motor driven and controlled by the drive control circuit portion and used for displaying time.

Description

technical field [0001] The present invention relates to a timepiece with an antenna built therein. Background technique [0002] Conventionally, so-called radio-controlled timepieces that receive standard radio waves and set time based on time information included in the received standard radio waves are known (see, for example, Patent Documents 1 and 2). [0003] The radio-controlled timepiece described in Patent Document 1 has: a substantially cylindrical case made of metal parts; glass mounted above the case through a gasket; and a metal part mounted below the case. the back cover; and the movement with radio-controlled timepiece receiver set inside the case. In this radio controlled timepiece, a configuration is adopted in which a recess is provided on the inner peripheral surface of the case and the back cover, and a non-magnetic member having a resistivity of 7.00 μΩ or less is engaged with the recess. [0004] In addition, Patent Document 2 describes a skeleton watc...

AI Technical Summary

Problems solved by technology

[0007] However, in the above-mentioned radio-controlled timepiece, although the structure of reducing the disturbance of the resonance phenomenon near the receiver of the radio-controlled timepiece is adopted by arranging a part of the non-magnetic part, since the case and the back cover are formed of metal parts, there is a problem that it cannot The problem of obtaining sufficient receiver sensitivity

In addition, in the conventional skeleton watch described in Patent Document 2, when the case is formed of glass and a hole through which the crown is inserted is provided on the case, there is a problem that the durability of the case is significantly reduced.

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