JP2008210080A - Crime prevention sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crime prevention sensor preventing unauthorized operation of an intruder by using an external magnet with one read switch. <P>SOLUTION: This crime prevention sensor 1 detects whether a window 2 is opened or closed by moving a magnetism sensitive switch 7 closer to or farther from the driving magnet 4 by installing the driving magnet 4 to the inside of one door 3 of the window 2 and installing the magnetism sensitive switch 7 to a position opposite to the driving magnet 4 of the other door 5. The driving magnet 4 has: a first magnet 8 magnetizing contact points 7a, 7b of the magnetism sensing switch 7 to opposite poles by approaching the magnetism sensitive switch 7 when the window is closed; and a second magnet 9 restoring the contact points 7a, 7b of the magnetism sensing switch 7 to off states by separating the first magnet 8 when opening the window 2, and magnetizing the contact points 7a, 7b of the magnetism sensing switch 7 to the same poles by approaching the magnetism sensitive switch 7 and turning it off. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a security sensor that detects opening and closing of windows and doors, and more particularly to a security sensor that can prevent an unauthorized operation even if an intruder operates the security sensor to malfunction by using an external magnet.

Conventionally, as a security sensor for windows and doors, a magnet sensor system in which a reed switch and a magnet are combined has been mainly used.

FIG. 4 is a configuration diagram showing a conventional magnet sensor type security sensor used for a sliding window.

In the figure, 101 is a reed switch installed on one door 103 of the sliding window 102, and 104 is a magnet installed on the other door 105. When the window 102 is closed, the reed switch 101 and the magnet 104 are close to each other, so that the reed switch 101 is turned on by the magnetizing action of the magnet 104.

If an attempt is made to open the window 102 in this state, the reed switch 101 and the magnet 104 are separated by the movement of the doors 103 and 105, and the magnet 104 does not magnetize the reed switch 101. The reed switch 101 is turned off by the separation force (elastic force). An alarm device (not shown) is activated by detecting the OFF state of the reed switch 101.

The structure and operating principle of a crime prevention sensor combining such a reed switch and a magnet are widely known, and this operating principle is reversed, that is, the window is closed using the external magnet 106 even when the window is open. In recent years, there has been an increase in the number of techniques that do not operate the alarm by creating the same reed switch on state.

Various techniques for preventing such unauthorized operation using an external magnet have been developed. A reed switch that closes a contact by the proximity of a magnet and a reed switch that opens a contact by the proximity of a magnet are provided in the same case. When an external magnet is brought close to the case, a technique for detecting illegal work by opening the contact of the latter reed switch (Patent Document 1), a reed switch that does not react with a reed switch that reacts due to the proximity of a predetermined magnet is provided, and intrusion When a person or the like brings an external magnet close to the case, a technology that detects unauthorized work by reacting both reed switches (Patent Document 2), optimally arranging a magnet and a magnetically sensitive switch combined therewith, or magnetic shielding The on / off characteristics of the magnetically sensitive switch can be controlled by the intruder's external magnet by arranging the plate. The technique (patent document 3) which prevents this is disclosed.

Japanese Patent Laid-Open No. 2001-14990 JP 2003-281636 A JP 2006-164958 A

However, all of the techniques disclosed in Patent Documents 1 to 3 require a plurality of reed switches, and the structure is complicated because the reed switches and magnets must be optimally arranged. was there.

In view of the above problems, an object of the present invention is to provide a security sensor that can prevent an unauthorized operation using an external magnet of an intruder even if there is only one reed switch.

In order to achieve the above object, a security sensor according to claim 1 is provided with a drive magnet attached to the inside of one door of a window, and a magnetic sensitive switch mounted at a position opposite to the drive magnet of the other door. A security sensor that detects the open / closed state of the window by the proximity or separation of the magnet, and when the window is closed, the drive magnet is magnetized to the opposite pole by magnetizing the contact point of the magnetic sensitive switch by being close to the magnetic sensitive switch. The first magnet to be in a state and the first magnet separating when opening the door of the window restores the contact of the magnetic sensitive switch to the OFF state, and closes the magnetic sensitive switch to the magnetic sensitive And a second magnet for magnetizing the switch contacts to the same pole to turn them off.

The crime prevention sensor according to claim 2 is the crime prevention sensor according to claim 1, wherein the drive magnet has a first magnet and a second magnet along the moving direction in which the door of the window is opened from the state where the window is closed. It is characterized by the fact that a magnet is additionally provided.

The security sensor according to claim 3 is the security sensor according to claim 1 or 2, wherein the first magnet is magnetized by the proximity to the opposite poles of the magnetically sensitive switch and is turned on. The surface side facing the magnetic sensitive switch is composed of two magnets having different magnetic poles, and two magnets are provided at both ends of the magnetic sensitive switch.

The security sensor according to claim 4 is the security sensor according to claim 1 or 2, wherein the first magnet is magnetized by the proximity to the opposite poles of the magnetically sensitive switch and is turned on. The two ends are composed of one magnet having different magnetic poles.

The crime prevention sensor according to claim 5 is the crime prevention sensor according to any one of claims 1 to 4, wherein the second magnet magnetizes the contact of the magnetically sensitive switch to the same pole by proximity and turns off. In order to obtain a state, the surface side facing the magnetically sensitive switch is composed of at least one magnet having one of the magnetic poles.

According to a sixth aspect of the present invention, there is provided a security sensor according to any one of the first to fifth aspects, wherein the magnetically sensitive switch comprises a reed switch.

According to the security sensor of the present invention, a drive magnet is attached to the inside of one door of a window, a magnetic sensitive switch is attached to a position opposite to the drive magnet of the other door, and the window is moved by proximity or separation between the drive magnet and the magnetic sensitive switch. A security sensor for detecting the open / closed state of the magnet, wherein the drive magnet is magnetized to the opposite poles when the window is closed to magnetize the contacts of the magnetically sensitive switch to the on state. When the magnet and the first magnet are separated from each other when opening the door of the window, the contact of the magnetic sensitive switch is restored to the OFF state, and the magnetic sensitive switch contact is made the same polarity by being close to the magnetic sensitive switch. And a second magnet that is magnetized in an off state to prevent unauthorized operation using an intruder's external magnet even with only one magnetically sensitive switch It is possible to provide a capacitor.

Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.

First, an embodiment in which the security sensor of the present invention is applied to a sliding window will be described with reference to FIGS.

FIG. 1 is a configuration diagram showing a state in which the security sensor of the present invention is attached to a sliding window. In the figure, the security sensor 1 is composed of a drive magnet 4 attached to the inside of one door 3 of the sliding window 2 and an opening / closing sensor 6 attached to the inside of the other door 5. A reed switch 7 is included as a magnetically sensitive switch attached at a position facing the magnet 4.

When the window 2 is closed, the drive magnet 4 is close to the reed switch 7 so that the contacts 7a and 7b of the reed switch 7 are magnetized to opposite poles and turned on, and the door of the window When the first magnet 8 is separated, the contacts 7a and 7b of the reed switch 7 are restored to the OFF state and the contacts 7a and 7b of the reed switch 7 are made the same by approaching the reed switch 7. And a second magnet 9 which is magnetized to a pole and is turned off. The first magnet 8 and the second magnet 9 are provided along the moving direction in which the window door is opened from the state in which the window 2 is closed.

The first magnet 8 is composed of two magnets A and B, and is opposed to the reed switch 7 of the magnet A in order to magnetize the contacts 7a and 7b of the reed switch 7 to the opposite poles due to proximity and turn them on. Magnet A is read with the surface side set to one pole, eg, N pole (or S pole), and the side facing the reed switch 7 of magnet B as the other pole, eg, S pole (or N pole). A magnet B is provided on one lead piece side located at both ends of the switch 7 on the other lead piece side.

The second magnet 9 is composed of at least one magnet C, and in order to magnetize the contacts 7a and 7b of the reed switch 7 to the same pole and bring them into the off state by proximity, either side of the surface facing the reed switch 7 is selected. One pole, for example, N pole (or S pole) is provided at the center of the reed switch 7.

The operation of the security sensor according to the present invention configured as described above will be described. When the doors 3 and 5 of the window 2 are closed, the first magnet 8 of the drive magnet 4 and the reed switch 7 are close to each other, so that the reed pieces of the reed switch 7 are magnetized to opposite poles by the magnets A and B. Then, the contacts 7a and 7b are turned on.

If the doors 3 and 5 of the window 2 are opened from this state, the first magnet 8 and the reed switch 7 are separated from each other, the magnetization action of the reed piece disappears, and the contacts 7a and 7b of the reed switch 7 are turned off. Restore. Further, due to the proximity of the reed switch 7 and the second magnet 9 provided along the moving direction in which the window opens, the reed piece of the reed switch 7 is magnetized to the same pole and the contacts 7a and 7b are turned off. The alarm is activated by detecting the OFF state of the contacts 7a and 7b.

In the security sensor of the present invention, as shown in FIG. 2, a suspicious person tries to open the doors 3 and 5 of the window 2 by bringing the external magnet 10 close to the reed switch 7 from the outside of the window 2 in an attempt to perform an unauthorized operation. However, since the magnetic force of the second magnet 9 is higher than the magnetic force of the external magnet 10, the contacts 7a and 7b of the reed switch 7 are magnetized to the same pole and turned off, and the off state of the contact 7 is detected. Then activate the alarm.

In the above description, the first magnet 8 is composed of two magnets A and B each having a different magnetic pole on the side facing the reed switch 7, but is shown in FIG. 3 instead of the two magnets A and B. Thus, it can also be comprised with the one magnet D which has a magnetic pole from which both ends differ.

The second magnet 9 is not limited to the single magnet C, and a plurality of magnets having a surface facing the reed switch 7 as one of the poles may be arranged along the reed switch 7.

In the above description, the security sensor of the present invention has been described in the embodiment applied to the sliding window that can be opened from either the left or right side, but only one side sliding window, the raising / lowering window that is opened and closed by sliding up and down, either left or right The present invention can be applied to any window such as an opening window that opens and closes around a shaft, and an extrusion window that opens by pushing outward.

As described above, according to the security sensor of the present invention, a drive magnet is attached to the inside of one door of a window, and a magnetic sensitive switch is attached to a position facing the drive magnet of the other door. A security sensor that detects the open / closed state of the window by the proximity or separation of the magnet, and when the window is closed, the drive magnet is magnetized to the opposite pole by magnetizing the contact point of the magnetic sensitive switch by being close to the magnetic sensitive switch. The first magnet to be in a state and the first magnet separating when opening the door of the window restores the contact of the magnetic sensitive switch to the OFF state, and closes the magnetic sensitive switch to the magnetic sensitive By adopting a structure that includes a second magnet that magnetizes the switch contacts to the same pole and turns them off, even if there is only one magnetically sensitive switch, an unauthorized use of an intruder's external magnet It is possible to provide a security sensor that can prevent the work.

The block diagram which showed the state by which the security sensor of this invention was attached to the sliding window. Explanatory drawing which showed the state which the crime prevention sensor of this invention tried to perform unauthorized operation by a suspicious person. Explanatory drawing which showed the other Example of the security sensor of this invention. The block diagram which showed the conventional security sensor of the magnet sensor system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Security sensor 2 ... Differential window 4 ... Drive magnet 6 ... Opening / closing sensor 7 ... Reed switch 7a, 7b as a magnetic sensitive switch ... Reed switch contact 8 ... 1st magnet 9 ... 2nd magnet

Claims (6)

A drive magnet is attached to the inside of one door of the window, and a magnetic sensitive switch is attached to the other door at a position facing the drive magnet, and the open / closed state of the window is detected by the proximity or separation of the drive magnet and the magnetic sensitive switch. A security sensor, wherein the drive magnet is magnetized to a reciprocal pole by bringing the magnetic sensing switch close to the magnetic sensing switch when a window is closed, When opening the door of the window, the first magnet separates to restore the magnetic sensitive switch contact to the off state, and the proximity of the magnetic sensitive switch makes the magnetic sensitive switch contact the same. A security sensor, comprising: a second magnet that is magnetized to a pole and is turned off. 2. The security sensor according to claim 1, wherein the drive magnet is provided with the first magnet and the second magnet along a moving direction in which the window door is opened from a state in which the window is closed. . The first magnet is composed of two magnets having different magnetic poles on the surface side facing the magnetic sensitive switch in order to magnetize the magnetic sensitive switch contacts to the opposite poles due to proximity and to turn them on. The security sensor according to claim 1 or 2, wherein the two magnets are provided at both ends of the magnetic sensitive switch. The first magnet comprises one magnet having magnetic poles that are different at both ends in order to magnetize the contact of the magnetically sensitive switch to an opposite pole by proximity and turn it on. 2. Security sensor according to 2. The second magnet has at least one magnet having one of the magnetic poles on the surface side facing the magnetic sensitive switch so as to magnetize the magnetic sensitive contact of the magnetic sensitive switch to the same pole and bring it into an OFF state by proximity. The security sensor according to any one of claims 1 to 4, wherein: The security sensor according to any one of claims 1 to 5, wherein the magnetic sensitive switch comprises a reed switch.

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