JP2005124973A - Radio tagging mirror switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switching device of a defogging heater using radiocommunications through a silver film between the front and back sides of a glass. <P>SOLUTION: A radio tag 6 disposed on the front side of a glass is composed of an antenna 3 which receives radio waves, a tag IC 4 which transmitting data from the antenna 3 using this electric power, after receiving radio waves for power supply, and a switch 5 which performs ON/OFF controls on the data transmission. A mirror switching device 2 includes a plurality of such radio tags 6, each of which is arranged to receive and transmit radio waves through a leader antenna 10 disposed on the rear side of the glass. There radio tags 6 are provided with such functions as switching on or off a defogging heater 9 disposed on the rear side of the glass and switching the temperature between high and low, making the front and back sides of the glass constitute the mirror switch device 2 capable of using radiocommunications through a glass. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a switch for turning on / off a mirror anti-fogging heater, which receives radio waves (here, including electromagnetic waves, the same applies hereinafter), receives power supply, and uses this power supply. The present invention relates to a mirror switch device using a wireless tag that transmits data from an antenna.

  For example, a mirror for a vanity is provided with an anti-fogging heater on the back side of the glass. When the surface of the mirror becomes cloudy, the heater is turned on to heat and adhere to the mirror surface. Water drops are disappearing. Thus, there is a switch described in Patent Document 1 as a switch for turning on / off such an anti-fogging heater. In the switch of Patent Document 1, a portion where a silver screen is not formed by coating is formed on the back side of the glass, and a capacitance detection sensor is provided in the portion, and capacitance generated by condensation on the glass surface side. The change is detected by the detection sensor, and the anti-fogging heater is turned on and heated to eliminate dew condensation.

In the technique described in Patent Document 2, a region where a silver film is not formed by coating is partially provided on the back side of the glass, and a photoelectric type light emitting / receiving element is provided in this region to form a switch. When condensation occurs on the glass surface side, the user detects the reflected light by detecting the reflected light on the glass surface side of the transparent part where the silver film is not coated. A heater disposed on the back side of the glass is turned on and heated to eliminate the condensation.
Japanese Utility Model Publication No. 6-57262 Japanese Utility Model Publication No. 6-29463

However, in the inventions described in Patent Documents 1 and 2, it is necessary to provide a portion where no silver film is formed on the rear surface of the glass. In such a portion where the silver film is not formed, it is necessary to peel and remove the silver film once on the entire glass back surface, which is a very troublesome operation. That is, the silver film is formed by uniformly pouring a silvering material over the entire surface of the glass back surface, washing it with distilled water and drying it so that the silver film remains on the entire surface of the glass back surface. In addition, if the silver film partial peeling and removal work is not performed carefully, there is a drawback that the appearance from the surface side of the mirror is deteriorated.
Moreover, in the past, it was thought that communication using radio waves was impossible between the front and back sides of the glass with a silver film, so a non-contact type switch using radio waves should be installed. Was not done.

  In view of the above-mentioned problems, the present invention has been improved and removed, and it is found that communication is possible between the glass front side and the back side through a silver film, and a mirror switch device for anti-fogging is not provided. To do.

  Thus, the means of claim 1 adopted by the present invention to solve the above-mentioned problems is that the glass surface has an antenna for receiving radio waves and a radio wave received and supplied with power. A wireless tag consisting of a tag IC that transmits data from an antenna and a switch that controls ON / OFF of data transmission is provided, and a reader antenna is installed on the back side of the glass so that communication can be established between the two. The wireless tag mirror switch device is characterized by the above.

  The means of claim 2 employed by the present invention is the RFID tag mirror switch device according to claim 1, wherein the anti-fogging heater disposed on the back side of the glass is a reader antenna.

  According to a third aspect of the present invention, the switch has two electrodes exposed on the glass surface side, and can be switched on and off by touching with a finger. The RFID tag mirror switch device according to claim 1.

  In the first aspect of the present invention, the wireless tag disposed on the glass surface side includes an antenna that receives radio waves, a radio wave that is received and supplied with power, and the power is used to transmit data to the antenna. The tag IC is transmitted from and the switch for ON / OFF control of data transmission. The mirror switch device has a plurality of such wireless tags, and each wireless tag transmits and receives radio waves through a reader antenna on the back side of the glass. Therefore, by providing the data of each wireless tag with the ON / OFF function of the anti-fogging heater arranged on the back side of the glass, the switching function between high temperature and low temperature, etc., the radio wave between the front side and the back side of the glass It is possible to make a mirror switch device using

  In the invention of claim 2, the anti-fogging heater in which the antenna on the reader side for exchanging information with the wireless tag is incorporated on the back side of the glass is also used. As described above, by using the anti-fogging heater, it is not necessary to provide a dedicated antenna separately, and the entire structure can be made compact and the cost can be reduced.

  In the invention of claim 3, the switch can be switched only by touching the two electrodes exposed on the glass surface side with a finger. The switch itself can be made thin and simple, and the cost can be reduced, and maintenance is also free.

  The configuration of the present invention will be described below based on the embodiment of the invention shown in the drawings. 1A and 1B relate to an embodiment of the present invention. FIG. 1A is a side view showing the entire mirror 1 and FIG. 1B is a diagram showing an electric circuit configuration of the mirror switch device 2. As shown in the figure, the mirror switch device 2 of this embodiment includes an antenna 3 that receives radio waves, a radio wave that receives power supply, and transmits data from the antenna 3 using this power source. The wireless tag IC 4 includes a single wireless tag 6 including a wireless tag IC 4 and a switch 5 that performs ON / OFF control of data transmission of the wireless tag IC 4. Three wireless tags 6 are provided. The data of each RFID tag IC4 is set to any one of a function for controlling ON / OFF of the power supply of the anti-fogging heater 9, a function for maintaining the heater 9 in a high temperature state, and a function for maintaining the heater 9 at a low temperature. . Moreover, the switch 5 should just expose two electrodes to the surface side of the glass 7. FIG. When the user touches the two electrodes with a finger (part of the body), the ON operation is started. In addition, the switch 5 may be a limit switch or a capacitance sensor. In the case of a capacitance sensor, the sensor may be touched with a fingertip.

On the other hand, a silver film 8 is formed on the back side of the glass 7 by coating. The silver screen 8 is as thin as possible for transmission / reception of signals using radio waves. For example, if the thickness of the silver film 8 is about 80 nanometers, the transmission / reception of radio waves at 125 KHz is within the limits of the Radio Law. It was possible. An anti-fogging heater 9 and a reader antenna 10 are attached to the back side of the silver film 8. The reader antenna 10 transmits a radio wave for power supply to the mirror switch device 2 and receives data of the wireless tag IC 4 transmitted from the antenna 3 of the mirror switch device 2 to control the control circuit ( It is set to transmit data to (not shown).
In addition, in a test using an aluminum stay having a thickness of several microns to several tens of microns in place of the silver screen 8, transmission / reception of 125 KHz radio waves was impossible at radio wave strengths within the limits of the Radio Law.

  Next, the operation | movement aspect of the mirror switch apparatus 2 comprised in this way is demonstrated. Now, it is assumed that the glass surface of the mirror 1 is cloudy due to condensation. The user prepares the wireless tag IC 6 of the switch device 2 on the front side of the mirror 1 and turns it on by touching or touching the switch 5 with the fingertip. As a result, the radio wave transmitted from the reader antenna 10 is received by the antenna 3 of the RFID tag IC, and a voltage for operation is generated in the voltage circuit inside the RFID tag IC.

  When the switch 5 is turned on, data stored in the wireless tag IC 4 is transmitted from the antenna 3 to the control circuit of the anti-fogging heater 9 through the wireless communication interface. The control circuit performs a setting operation according to the transmitted data. As a result, the remote control operation by the wireless communication method is performed, and the anti-fogging heater 9 is turned on to heat the mirror 1 and the condensed water on the glass surface disappears.

  The reader antenna 10 may use an anti-fogging heater 9 on the back side of the glass. The heater 9 has a considerable size, which is advantageous depending on the wavelength of the frequency used by the wireless tag, and can significantly reduce the number of windings. Further, by using the anti-fogging heater 9, there is an advantage that it is not necessary to separately install a dedicated antenna.

FIG. 1A is a side view showing an entire mirror, and FIG. 1B is a diagram showing an electric circuit configuration of a mirror switch device according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mirror, 2 ... Mirror switch apparatus, 3 ... Antenna, 4 ... Wireless tag IC, 5 ... Switch, 6 ... Wireless tag, 7 ... Glass, 8 ... Silver film, 9 ... Antifogging heater, 10 ... Reader antenna

Claims (3)

On the glass surface side, an antenna for receiving radio waves, a tag IC for receiving radio waves and receiving power supply, and transmitting data from the antenna using this power source, and ON / OFF control of data transmission A wireless tag mirror switch device comprising a wireless tag comprising a switch, a reader antenna installed on the back side of the glass, and communication between the two. 2. The RFID tag mirror switch device according to claim 1, wherein the antifogging heater disposed on the back side of the glass is a reader antenna. The wireless tag mirror switch device according to claim 1 or 2, wherein the switch has two electrodes exposed on the glass surface side and can be switched ON / OFF by touching with a finger.

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