JPH0353344Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a terminal unit of a CATV system installed in guest rooms of hotels, inns, etc., a remote control unit used to operate electrical equipment such as coolers, In particular, it relates to anti-theft technology for wireless remote control units.

[Technical issues to be solved]

In hotels that require high-grade services, not only air conditioners and video equipment, but also CATV systems have recently been introduced as common equipment, and with this, terminal operating units are becoming increasingly popular. Wireless remote control units, which are easy to use, are also becoming widely used, but since such remote control units are portable, guests sometimes take them home with them as souvenirs of their stay, and there is a need for measures to prevent this. As a countermeasure, a system could be considered in which the wireless remote control unit has a built-in oscillator and is inspected by a detection device installed at the front desk or counter, but this is not desirable from a business perspective as it would embarrass the customer. That's not the point.

[Aim of this invention]

The present invention aims to realize a remote control unit with an anti-theft function that issues an alarm when the wireless remote control unit is put in a bag or pocket to be taken home, thereby preventing the user from taking the wireless remote control unit home.

[Means to accomplish the task]

The present invention focuses on the fact that when the wireless remote control unit is taken out, it is stored in a bag or pocket, and the detection circuit 10 is equipped with a light receiving element PT.
1 is stored in a bag or pocket, and in response to the light blocking signal from the detection circuit 101, the oscillation circuit 103 is activated via the switching circuit 102 to issue an alarm. This is an attempt to encourage customers to reflect on their concerns and give up taking out the items.

〔Example〕

FIG. 1 is an exemplary block diagram of a CATV system, in which a CATV terminal 200 includes a television unit 4.
00, CATV network 500 is connected,
Remote control is possible using a wireless remote control unit 100. Note that 300 indicates an illumination light source such as an indoor light or a night light.

The wireless remote control unit 100 includes, in addition to a remote control control section 105 and a power supply 106, a detection circuit 101, a switching circuit 102, and an oscillation circuit 1.
03 and an alarm 104 are incorporated. Specifically, as shown in FIG. 2, the detection circuit 101 includes a light receiving element PT,
When the light receiving element PT is receiving light from the light source 300, a base current is supplied to the transistor _Q1 , turning _Q1 into an ON state, while blocking light from entering the light receiving element PT from the light source 300. When this happens, the transistor _Q1 is turned off, and it is possible to determine whether the light is received or blocked. Note that VR is a variable resistor that sets the light level at which the oscillation circuit 103 operates. Next, the switching circuit 102 switches the transistor of the detection circuit 101.
When Q ₁ is in the ON state (light receiving state), a reverse bias is applied and it becomes OFF, while transistor Q ₁ is OFF.
Transistor Q ₂ which is ON in state (light shielded state)
When the transistor Q ₂ is in the OFF state, no base voltage is applied, and it is also OFF, and the power supply 10
The current supply from the power supply 106 to the oscillation circuit 103 is cut off, while when the transistor Q ₂ is in the ON state, the base voltage is applied and the transistor Q ₃ is turned ON, supplying current to the oscillation circuit 103 from the power supply 106. ing. Note that the light receiving element PT must be one that can detect 0.1 lux or more (for example,
If a silicon plate type photodiode (OT22, product name: manufactured by Oki Electric Industry Co., Ltd.) is used, it will work well even with weak light from a low-intensity illumination light source such as a night light installed in a guest room.

Therefore, if the light beam from, for example, the illumination light source 300 is normally incident on the light receiving element PT, the oscillation circuit 103 will not operate, so the alarm 104 will not issue an alarm, but when you take the wireless remote control unit 100 home. If you hide it in your bag or clothing pocket, the illumination light will no longer enter the light receiving element PT (light shielding state), so the detection circuit 101 will detect this and turn on the switching circuit.
The current is supplied from the power supply 106 to the oscillation circuit 103 to cause the oscillation circuit 103 to perform an oscillation operation, and the alarm 104 issues an alarm. Surprised by this, I gave up on taking the wireless remote control unit home, and when I took it out of my bag or clothing pocket, the light-receiving element was detected again.
When the PT receives light, the current supply to the oscillation circuit 103 is stopped and the alarm stops sounding.

In addition, in preparation for when all the illumination light sources 300 including the night light are turned off during sleep, etc., it is preferable to have an infrared light source to irradiate the room in place of the illumination light source 300. Further, the alarm device 104 may be installed in the room separately from the remote control unit 100.

[Effects of this invention]

As explained above, according to the present invention, it detects when a wireless remote control unit is hidden in a bag or clothes when the user tries to take it home and sounds an alarm to prevent theft, which is easier than a system that checks at the front desk or counter. It is extremely useful in the hotel industry because it not only has a sophisticated mechanism, but also prevents theft.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a CATV system in which the remote control unit according to the present invention is used, and FIG. 2 is a circuit diagram showing an example of a practical circuit that exhibits the theft prevention function. 100...Wireless remote control unit, 10
1...Detection circuit, 102...Switching circuit,
103...Oscillation circuit, 104...Alarm device.

Claims (1)

[Scope of utility model registration request] A detection circuit 101 includes a light-receiving element PT and discriminates between light reception and light-blocking states, an oscillation circuit 103 that activates an alarm 104, and turns off when receiving a light-receiving signal from the detection circuit 101, and turns on when it receives a light-blocking signal. A remote control unit with an anti-theft function, characterized in that it includes a switching circuit 102 for operating an oscillation circuit 103.