JPS5847510Y2 - How to get the job done - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a crime prevention device that detects and notifies an intruder such as a whole fruit.

Various countermeasures against intruders such as whole fruit have been considered in the past, but the simplest of these is to improve the locking structure of the doors and windows that provide entry routes.

However, relying on such locks has little credibility;
There is a risk that it can be opened relatively easily.

There are other methods that use photoelectric conversion to detect intruders, but it is difficult to install such devices at each entry point in a typical home, and it is also disadvantageous in terms of cost. .

Therefore, although the present invention has a relatively simple and inexpensive configuration, by exploiting the psychological blind spot of the intruder,
The purpose of this system is to accurately detect and notify an intruder even if the lock is broken. The purpose of the present invention is to provide a new detection device.

Hereinafter, the details of the present invention will be explained based on the drawings.

As shown in FIG. 1, when the door 1 is closed and locked as shown in the state shown in Fig. 1 and the lock is broken and an intruder opens the door 1 and enters, The opening of the door 1 is detected by the limit switch 2, and the alarm device 3 is activated after a certain period of time.If the intruder is not a thief but a household member, the limit switch 2 detects the opening within the certain period of time. An attempt is made to eliminate the operation of the notification device 3 by performing an operation of canceling the power supply to the device.

More specifically, the limit switch 2 is configured so that it is not turned on when the door 1 moves in the closing direction, but is turned on when the door 1 moves in the opening direction (details will be described later).
Then, the limit switch 2 is connected to the notification device 3 via a suitable self-holding circuit 4 and timer 5, as shown in FIG.

Reference numeral 6 denotes a power switch for the detection device of the present invention, which is installed indoors in a place out of sight of people.

The structure of the power switch 6 is a cylinder lock type mortar,
It is turned on by locking it like a lock.
In the opposite case, it should be turned off.

When the power switch 6 is OFF and the door 1 is opened to the position ■ in Fig. 1, the limit switch 2 is turned ON once.
However, the detection device does not operate because it is not energized.

Next, turn the power switch 6 to 0NL (lock it),
Close door 1 as shown in Figure 1.

In this case, the detection device is energized, but the limit switch 2 remains ON even if it comes into contact with the door 1 that is moving in the closing direction.
No L.

This is the set state. Suppose that the person in the house locks door 1 and leaves the house in this state.

After this, the intruder removes the 10 locks on the door or breaks it, opens the nl as shown in Figure 1, and enters inside.

Then, the limit switch 2 is turned on by the door 1 moving in the opening direction, which activates the self-holding circuit 4, and even if the sl is closed again, the timer 5 is energized.
Timer 5 starts operating.

Then, after the timer setting time has elapsed, the notification device 3 is driven.

If this is the case when the person in the house returns, the detection device can be reset by turning off the power switch with the key after opening the door 1, and the first drive of the notification device 3 can be stopped.

The above is the principle of the present invention, and the detection device has the following remarkable features.

If the person who opened the door 1 is an empty nester, the empty nester is □1
It is thought that he used his nerves by removing the lock, and when he removed the lock and opened the door, he was concentrating all his attention on checking for signs inside the house.

At this time, it is considered that the sense of security that comes from unlocking the door 1 itself significantly impairs the consideration given to searching for the presence of other detection devices.

Therefore, the detection device of the present invention exploits the psychological blind spots such as empty nests, so that their existence is almost never known.

The existence of the delay time caused by the timer 5 further exploits the psychological blind spot of the projector and does not make him aware of the existence of the detection device of the present invention.

This is because, even if it is thought that a hole-inducing device would issue an alarm when Door 1 is opened, as it emphasizes early detection, it is hard to imagine that the alarm would sound due to a time delay.
Even if you are aware of the existence of a box, it is difficult to be considerate when you are at the scene of the approach.

Therefore, the existence of the above delay time poses a considerable threat to the burglars who have entered the house and are beginning to feel a sense of relief. For those living in other households, this allows them to turn off the power switch 6 with plenty of time to spare, thereby preventing unexpected malfunctions.

Furthermore, the operation of the detection/detection device of the present invention cannot be stopped unless the power switch 6 is turned off.

In Fig. 1, this power switch 6 is installed near the door 1 to make its presence clear, but in reality, it could be placed anywhere as it would damage the electrical connection using the cord. good.

Therefore, the existence of the detection device of the present invention becomes unclear.
Even if you notice it, it is impossible to find it easily.

Even if you are lucky enough to find it, the lock will not come off easily unless you use a duplicate key, and the notification device 3 will continue to operate during that time.

3 and 4 show a solid configuration of the limit switch 2. As shown in FIG.

The limit switch 2 has a detection piece 7 with one end pivoted, and a coil spring 8 pushes the detection piece 7 outward.
A seat 9 is formed on the free end of the detection piece 7, and a roller support piece 11 is attached to the seat via a pin 10 so that it can freely rotate around the pin 10. Pivot to the tee.

Reference numeral 12 denotes a roller that is axially mounted on the roller support member 11.

Further, a coil spring 13 (the coil spring 13
is attached around pin 10.

), it is installed so that it can only be rotated freely. Therefore, as shown in FIGS. 3 and 4, the limit switch 2 is installed so that the direction in which the roller support member 11 is rotated matches the direction in which the door 1 is closed, and the roller 2 is placed in the opening/closing trajectory of the door. If the door 1 contacts the roller 2 in the closing direction as shown in FIG.
As a result, the limit switch 2 is not turned on, and on the other hand, when opening the door 1, as shown in FIG. It rotates via the pivot pin 14, which turns on the limit switch 2.

Figure 5 shows a specific circuit diagram of the detection device of the present invention.
B is a DC power supply, SW□ is a power switch shown in 6 in Figure 1, LSl is a limit switch also corresponding to 2, B
is a buzzer, TR□ and TR2 are transistors forming a flip-flop circuit, and TR3 is a thyristor 5CR1.
Driving transistor, cl> and C2 are capacitors,
Dl is a diode, and vRl is a variable resistor.

Note that transistor TR and transistor TR2 are OFF.
And only when the 9th terminal of the capacitor C1 is positively charged, it is turned on to trigger the gate of the thyristor SCR, making it conductive.

As mentioned in the previous explanation, if the power switch SW1 is turned on and the door 1 is closed, the limit switch LS1 is in the OFF state, so the capacitor C2 is charged, and the discharge current of the capacitor C2 is transferred to the transistor. TR2
Therefore, the transistor TR2 is turned on and the transistor TR is turned off.

At the same time, due to the conduction of transistor TR2, capacitor c1
m terminal → resistor R1 → diode D1 → transistor TR
It is charged through 2.

When the door 1 is opened from this state, the limit switch LS1 is turned on, the base bias of the transistor TR2 is lowered and cut off, the base bias is applied to the transistor TR, and the transistor TR□ is turned on, so the flip-flop is reversed. do.

Along with this, the potential at the ■ terminal of the capacitor C1 decreases, and the capacitor C1 begins to discharge through the variable resistor VR1, and after a predetermined time period determined by the resistance value of the variable resistor VR, the polarity of the capacitor C1 is reversed and the transistor TR3
ONt, triggers the thyristor 5CR1 to make it conductive, thereby energizing the buzzer Bz and making it sound.

Once the limit switch LSI is turned ON and the flip-flop is inverted, the flip-flop will maintain this stable state as is well known if the transistor TR is made conductive, so the limit switch LSI will be turned OFF again.
Therefore, unless the power switch SW1 is turned off, the buzzer BZ remains energized and the buzzer B2 continues to sound.

In this case, by changing the discharge time constant of the capacitor C1 using the variable resistor VR1, it is possible to change the one hour timer from when the limit switch LSI is turned on to when the buzzer Bz starts operating. VR
Can be set arbitrarily by □.

As detailed above, the present invention uses the opening and closing of the door to detect intruders, and uses a limit switch that does not close when the door moves in the closing direction, but closes when it moves in the opening direction. Therefore, the householder is not subject to any time constraints between opening the door, turning on the power switch, and closing the door to set it to the set state, and there is no need to rush outside due to the presence of this type of detection device. There are no problems and it is very easy to use.

Since the detection device starts operating when the door is opened from the set state of the detection device, as described in the embodiment, the psychological gap of the intruder, such as the whole fruit, is detected and the intruder is alerted to the intrusion, so it is very effective. The detection device of the present invention is large in size, and the risk of an intruder discovering the presence of the detection device of the present invention is extremely small, making it extremely effective as a crime prevention device.

Furthermore, if the power switch is configured with a cylinder lock hole as in the above embodiment, even if an intruder discovers the limit switch and notices the presence of the detection device of the present invention, he or she will be able to locate the power switch. It would take a considerable amount of time to remove the lock without locking it, so if you set the alarm device to operate for that time d, you will be able to be sure to be notified of an intrusion without any problems. This allows you to prevent crime before it happens.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the principle of the intruder detection device for attracting people of the present invention, Figure 2 is a block diagram used in the detection device of Figure 1, and Figures 3 and 4 are used in the present invention. FIG. 5 is an operational explanatory diagram showing one embodiment of the limit switch, and FIG. 5 is a specific circuit diagram of the detection device of the present invention. 1...4 29 L, sl・, limit switch, 3
゜B2...Notification device (buzzer), 4...Self-holding circuit, 5...Timer, 6. SWl...Power switch 1.7...Detection piece, 8, 13...Coil spring, 9.
...Mounting lever, 10°14...Pin, 11...Roller support member, 12...Roller.

Claims (1)

[Scope of utility model registration request] A limit switch that does not close when the door moves in the closing direction but closes when it moves in the open direction is used, and the limit switch is connected to an alarm device via a self-holding circuit and a timer, and the door is opened. The set state is set by turning on the power switch and then closing the door, and the release from the set state is detected by the limit switch, self-maintaining, and the notification device is driven after a set time. Features of intruder detection device for crime prevention.