JPH0569269U - Card lock device - Google Patents

Abstract

(57) [Abstract] [Purpose] A card lock device using a battery that can automatically clear a counter that counts the number of power-on times by using the fact that the battery is replaced to return to a predetermined initial voltage. provide. [Structure] A soft counter that counts the number of power-on times by inserting a card, and a counter when a predetermined initial voltage is applied by replacing the battery and there is a predetermined difference between the voltage at the previous power-on A control means for clearing the value is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a card lock device that is powered on by using a battery as a power source and inserting a dedicated card into a card insertion slot to unlock the door and various terminal devices.

[0002]

[Prior Art]

 In order to prevent outsiders and an unspecified number of people from entering, for example, a system that unlocks the doors of hotel rooms and laboratory doors for the first time using a special card is widely known. There is. Similarly, a system is also known that enables various terminal devices to operate by using a dedicated card.

In such a system (card lock device), when a battery is used as a power source, it is determined that the battery has reached the end of its service life when the battery voltage drops to a predetermined voltage, and the battery is replaced.

By the way, the life of a battery, for example, about one year to one and a half years under normal use, may be abnormally shortened for some reason. Therefore, a counter was provided to count the number of times the card was inserted into the card insertion slot, that is, the number of times the card was powered on. At that time, it was judged that there was something wrong with the device, the battery that had reached the end of its life was replaced with a new battery, the counter was cleared, and the power-on count operation was performed again as above.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional apparatus, the counter has to be cleared by manual operation of an operator or by data input, which has a drawback that the operation becomes complicated.

An object of the present invention is to provide a card lock device capable of automatically clearing a counter by replacing a battery by utilizing a phenomenon of returning to a predetermined initial voltage when the battery is replaced.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention clears the counter value when a predetermined initial voltage is applied by replacing the battery and when there is a predetermined voltage difference from the previous power-on. It is characterized in that a control means is provided.

[0008]

[Action]

 The voltage of the battery at each power-on is recorded in the RAM, and when the voltage value recorded in the RAM drops to a predetermined value, for example, 4.6 V to 4.3 V, the CPU issues a battery exhaustion warning or a battery replacement command. For example, output to the display unit. The operator will replace the battery with a new one by looking at the displayed contents, but when a predetermined initial voltage is applied by the replacement of the battery, the CPU clears the soft counter.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a control block diagram of the card lock device. 1 is a battery, for example, which is an AA battery with a predetermined initial voltage set to 6 V, and 2 is turned on by inserting a dedicated card (not shown). A switch 3 controls the entire apparatus, and has a CPU with a soft counter inside. 31 is an A / D converter inside the CPU 3, 4 is a ROM in which a control program is stored, 5 is a card inserted, in other words, a switch. RAM for receiving data corresponding to the battery voltage Vcc for every power-on by turning on 2 via the A / D conversion unit 31 and recording the data or other variables, and 6 by turning on the switch 2 In response to a command from the actuator, the actuator unlocks the door (not shown) or activates various terminals. This is a display unit that displays abnormalities such as pond consumption. Reference numeral 8 denotes a data input device that is connected to or separated from the CPU 3, has an independent power supply, and supplies auxiliary power to the CPU when it is connected to the CPU 3 by a connector. Further, the data input device 8 stores set data such as a room number of a hotel, a calendar, an unlocking time when the card lock is unlocked, and the entry record when the lock is released ( It has a function to record the unlocking date, error occurrence, etc. Therefore, the data input device is used as an external power source when the battery is down and is inoperable.

FIG. 2 shows a consumption characteristic diagram of the battery 1. The vertical axis represents the voltage V, and the horizontal axis represents the time T. In this embodiment, the initial voltage is set to 6V, the low detection voltage (voltage for judging that the battery has reached the end of its life) is set to 4.6V, and the down detection voltage (minimum operating voltage) is set to 4.3V. 6 to 4.6V is an average operating voltage, and a life of 1.5 years is usually guaranteed.

In this embodiment, each time the power is turned on at the timing of T ₁ , T ₂ , T _3, ..., The voltage value of the battery 1 at that time is recorded in the RAM 5, and at the timing of Tn, 1. When the voltage has dropped by 4 V and the life voltage has reached 4.6 V, the display unit 7 gives a warning display at this time according to an instruction from the CPU 3 that the battery replacement time has been reached.

As a result, the operator replaces the battery 1 at the time Ta in FIG. 2 and applies the initial voltage of 6 V to the CPU 3 again. When the battery 1 is replaced, when the condition that the voltage of the battery 1 is 6V and there is a difference of at least 1.4V from the voltage at the time of previous power-on (Tn) is satisfied. In the CPU 3, the count value Tn of the soft counter is cleared, and the counting operation is performed in the same manner as described above each time the power is turned on.

If the battery voltage drops 1.4V from the initial voltage of 6V and the value of the number of power-on times Tn when the battery 1 reaches the end of its life is near the reference value, the degree of battery consumption is positive. As always, if the number of times power is turned on is extremely small, it can be determined that something is wrong with the device and power loss in the battery has occurred. When the data input device 8 is connected in this state, the power loss of the battery is displayed on it. Then, maintenance can be performed according to this display.

[0015]

[Effect of the device]

 As described above, according to the present invention, only when the battery which has reached the end of life voltage is replaced with a new battery, the CPU compares and judges the voltage value data of both, and the counter value of the power-on count is automatically determined. Since it is cleared, the operation for clearing the data can be simplified and the counter is cleared when a new battery is set, but even if the battery immediately after replacement is mistakenly replaced with a new battery. Since the count value is not cleared, it is possible to detect the battery consumption degree with high reliability.

[Brief description of drawings]

FIG. 1 is a control block diagram of a card lock device according to an embodiment of the present invention.

FIG. 2 is a battery consumption characteristic diagram.

[Explanation of symbols]

 1 Battery 2 Switch 3 CPU 4 ROM 5 RAM 6 Actuator 7 Display

Claims (2)

[Scope of utility model registration request] 1. A card lock device in which a replaceable battery is used as a power source and a dedicated card is inserted into a card insertion slot to unlock a door or various terminal devices. A counter that counts the number of times of ON and a predetermined initial voltage is applied by replacing the battery,
A card lock device comprising: a control unit that clears the counter value when there is a predetermined voltage difference from the previous power-on time. 2. The card lock device according to claim 1, wherein the counter is constituted by a soft counter by a CPU.