JP2005315589A - Clock with built-in antenna - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transmit/receive electric waves favorably. <P>SOLUTION: In a clock provided with a built-in antenna, the clock shaft passing through the dial plate of the clock is provided, and the minute hand and a hour hand are provided on the clock shaft at least either of which functions as an antenna, the minute hand and the hour hand are settled on the other side of the dial plate while tilting at a predetermined angle. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an antenna built-in watch including an antenna for transmitting and receiving radio waves between a master station and a slave station for wireless communication.

In a conventional antenna built-in timepiece, a communication unit receives radio waves using a timepiece consisting of a minute hand and an hour hand arranged in parallel to a dial as an antenna (see, for example, Patent Document 1).
JP-A-11-150410 (page 3, left column, line 41-page 3, left column, line 47)

However, in the above-described conventional technology, the dial and the clock hands are arranged in parallel and the clock hands are arranged at a position relatively close to the dial. There is a problem that the reception sensitivity of the radio wave becomes worse.
In addition, when radio waves are transmitted with such an antenna, there is a problem that the influence of the reflection of the radio waves by the dial is increased, which adversely affects the transmission of radio waves.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide means capable of satisfactorily transmitting and receiving radio waves.

  In order to solve the above-mentioned problem, the present invention provides a timepiece with a built-in antenna comprising a timepiece penetrating the dial of a timepiece, and a minute hand and an hour hand that are installed on the timepiece shaft and at least one of them functions as an antenna. The minute hand and the hour hand are installed at a predetermined angle on the opposite side of the dial.

  As a result, the present invention can increase the distance between the clock hands and the dial, reduce the influence of the reflection of radio waves by the dial, etc., and can satisfactorily transmit and receive radio waves.

  Embodiments of an antenna built-in timepiece according to the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing the antenna built-in timepiece according to the first embodiment, and FIG. 2 is a side sectional view showing the antenna built-in timepiece according to the first embodiment.
1 and 2, reference numeral 1 denotes an antenna built-in watch.
Reference numeral 2 denotes a dial of the antenna built-in timepiece 1, and a through hole through which the timepiece shaft 3 passes is provided at the center.

The clock shaft 3 is composed of a minute shaft 3a made of metal and a time shaft 3b, and is arranged by fitting a hollow hour shaft 3b for moving the hour hand 4b on the outside of the minute shaft 3a for moving the minute hand 4a. To do.
Reference numeral 4 denotes a clock hand, which is composed of a minute hand 4a and an hour hand 4b made of metal. At the tips of the minute axis 3a and the hour axis 3b of the clock shaft 3, the axial direction of the clock shaft 3 and the dial 2 It is installed on the opposite side so as to be inclined at a predetermined angle α.

Reference numeral 5 denotes a gear storage portion, which is provided with a plurality of gears (not shown) combined therein, and the split shaft 3a and the time shaft 3b of the timepiece shaft 3 are rotated by these gears.
The clock hand 4 is configured to be electrically connected to the communication unit 6 via the clock shaft 3, and at least one of the minute hand 4 a and the hour hand 4 b functions as an antenna of the communication unit 6.
The communication unit 6 is installed inside the antenna built-in clock 1 and has a circuit for transmitting and receiving radio communication radio waves between the master station and the slave stations.

A clock cover 7 covers the dial 2, the clock shaft 3, the clock hands 4, the gear storage unit 5, and the communication unit 6.
Reference numeral 8 denotes a glass plate as a front cover, which is a transparent glass plate having a flat surface and is opposed to the dial 2 and the clock hands 4 and is disposed on the front surface of the antenna built-in watch 1.
In this way, the clock hand 4 is installed in the axial direction of the clock shaft 3 and on the opposite side of the dial 2 at a predetermined angle α, and the distance from the dial 2 to the tip of the clock hand 4 is increased. By doing so, when performing transmission / reception of radio waves by using the clock hand 4 with which the communication unit 6 is electrically conducting as an antenna, the influence of reflection of radio waves by the dial 2 can be suppressed to a low level.

As described above, in this embodiment, the distance between the clock hands and the dial can be increased by tilting the clock hands at a predetermined angle on the opposite side of the dial, and the radio waves generated by the dials. The influence of the reflection and the like can be reduced, and radio waves can be transmitted and received satisfactorily using the clock hands as antennas.
In addition, radio waves of all angles can be transmitted and received by utilizing the rotation of the clock hands.

In addition, by using a clock hand as an antenna, the surrounding aesthetic appearance is not impaired when installed indoors or outdoors.
The power required for driving the antenna built-in watch and the communication unit is obtained by sharing a power source such as a solar battery or externally supplied power.

3 is a front view showing the antenna built-in timepiece according to the second embodiment, and FIG. 4 is a side sectional view showing the antenna built-in timepiece according to the second embodiment.
In addition, the same part as the said Example 1 attaches | subjects the same code | symbol, and abbreviate | omits the description.
In FIG. 4, 10 is a metallic second shaft added to the clock shaft 3, and is arranged inside the hollow with the branch shaft 3a being hollow.

Note that a gear for rotating the second axis 10 is added to the gear storage 5 of the present embodiment.
Reference numeral 11 denotes a metal second hand added to the clock hand 4, and a shaft hole for fitting into the second shaft 10 is provided at the center thereof, and the minute hand 4 a of Example 1 is provided from the shaft hole to each end. Like the hour hand 4b, it is tilted at a predetermined angle α in the axial direction of the second axis 10 and on the opposite side of the dial 2. In order to indicate the display of the dial 2 on one side, the indication unit 11a has a color that is easier to see than the surroundings, and the other side is a protective color such as the same color as the dial 2 so that it is not noticeable compared to the surroundings. It is formed as a protective color portion 11b painted on the surface.

The second hand 11 is configured in the same manner as the minute hand 4 a and hour hand 4 b of the first embodiment, and is electrically connected to the communication unit 6 via the second axis 10 and functions as an antenna of the communication unit 6.
As described above, in the present embodiment, in addition to the effects of the first embodiment, the communication unit transmits and receives radio waves using the clock hand with the second hand that is electrically conductive when performing wireless communication as an antenna. Since the total rotation angle of the indication unit and the protection color unit is 360 degrees by rotating the second hand for 30 seconds, the directivity of radio waves is improved. In addition, since the other side of the second hand is a protective color portion, it can be distinguished from the instruction portion, and mistakes in the timepiece can be prevented.

FIG. 5 is a side sectional view showing the antenna built-in timepiece according to the third embodiment.
In addition, the same part as the said Example 1 attaches | subjects the same code | symbol, and abbreviate | omits the description.
In FIG. 5, reference numeral 12 denotes a dial, which is formed in a curved surface that is recessed from the outer periphery to the central portion, that is, a curved concave surface, and a through hole through which the clock shaft 3 passes is provided in the central portion.
The dial 12 is installed such that the outer periphery thereof is positioned at the same position as the outer periphery of the dial 2 installed in the first embodiment. Therefore, the clock shaft 3 penetrating through the through hole is recessed as compared with the first embodiment because the central portion of the dial 12 is recessed.

As described above, in this embodiment, in addition to the same effects as in the first embodiment, the clock shaft portion further protrudes, so that the distance between the clock hands and the dial can be further increased. By further reducing the influence of reflection of radio waves, radio waves can be transmitted and received better.
In this embodiment, the dial is formed on the curved concave surface. However, as shown in FIG. 6, if the curved surface is convex from the outer periphery to the central portion, that is, if it is formed on the curved convex surface, The distance between the clock hands and the dial can be further expanded from the base of the hands to the tip, further separating the distance between the clock hands and the dial, further reducing the influence of reflection of radio waves by the dial, Radio waves can be transmitted and received better.

7 is a side sectional view showing the antenna built-in timepiece of Example 4, and FIG. 8 is an explanatory view showing light refraction of the convex lens.
In addition, the same part as the said Example 1 and Example 3 attaches | subjects the same code | symbol, and abbreviate | omits the description.
In FIG. 7, reference numeral 13 denotes a convex lens as a front cover of the watch, which is opposed to the dial 12 with the clock hands 4 interposed therebetween, and is disposed so as to be convex outward on the front surface of the antenna built-in watch 1.

When a convex lens is not used as shown in FIG. 8A, there are some places where it is difficult to see the dial 12 when viewed from an oblique direction. Therefore, when a convex lens is used as shown in FIG. 8 (b), when the dial 12 is viewed from an oblique direction, it is possible to make it easy to see a portion that is difficult to see due to light refraction of the convex lens.
As described above, in this embodiment, in addition to the same effects as those of Embodiments 1 and 3, the dial is arranged even from an oblique direction by arranging the convex lens so as to be convex outward as the front cover of the watch. This makes it easier to see the numbers and letters displayed on the screen, improving the visibility of the dial.

  If the clock hands obtained by adding the second hand shown in the second embodiment to the third and fourth embodiments are applied as an antenna, the effects of the second embodiment can be obtained in addition to the effects of the third and fourth embodiments. An effect can be obtained.

The front view which shows the antenna built-in timepiece of Example 1. Side sectional view showing the antenna built-in timepiece of Example 1 The front view which shows the antenna built-in timepiece of Example 2. Side surface sectional drawing which shows the antenna built-in timepiece of Example 2. Side surface sectional drawing which shows the antenna built-in timepiece of Example 3. Side sectional view showing a watch with a built-in antenna with a curved convex face Side surface sectional drawing which shows the antenna built-in timepiece of Example 4 Explanatory drawing showing light refraction of convex lens

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Clock with built-in antenna 2, 12 Dial 3 Clock axis 3a Minute axis 3b Hour axis 4 Clock hand 4a Minute hand 4b Hour hand 5 Gear storage part 6 Communication part 7 Watch cover 8 Glass plate 10 Second axis 11 Second hand 11a Instruction part 11b Protection color part 13 Convex lens

Claims (4)

In the watch with a built-in antenna comprising a watch shaft penetrating through the dial of the watch, and a minute hand and an hour hand installed on the watch shaft and at least one of which functions as an antenna
A timepiece with a built-in antenna, wherein the minute hand and the hour hand are installed at a predetermined angle on the opposite side of the dial. In claim 1,
On the clock shaft, a second hand is installed that functions as an antenna with one side pointing to the display of the dial and the other side as a protective color with a protective color,
A timepiece with a built-in antenna, wherein the second hand is inclined at a predetermined angle in the same direction as the minute hand and hour hand. In claim 1 or claim 2,
A watch with a built-in antenna, wherein the dial has a curved surface. In claim 3,
A watch with a built-in antenna, wherein a lens is arranged as a front cover of the watch.