JP4670548B2 - Crescent lock with security buzzer - Google Patents

Description

  The present invention relates to an improvement of a crescent lock with a security buzzer that sounds a security buzzer when the crescent of the crescent lock is illegally rotated.

  A crescent lock used for sliding windows or doors, in which a pedestal for pivotally supporting the crescent is attached to an indoor shoji summon and a crescent receptacle attached to an outdoor shoji summon, an intruder As a configuration for sounding the security buzzer when the crescent is illegally rotated by partially destroying the glass from the outside, Patent Document 1 includes an alarm circuit, a reed switch, a security buzzer (alarm), It consists of a power supply and a power switch. A security buzzer for alarm circuit, a power supply and a power switch are attached to the summoning box (side frame) of the indoor side shoji, and a reed switch for the alarm circuit is attached to the base (mounting base). Discloses a configuration in which a permanent magnet is fixed. With this configuration, when the crescent is illegally rotated, the permanent magnet approaches the reed switch and closes, so that the security buzzer sounds.

  Patent Document 2 and Patent Document 3 include a power supply unit, an abnormality detection sensor, a microcomputer, an alarm unit, a magnet sensor that detects rotation of an operation lever (operation unit), a voltage monitoring unit, a display lamp, and an electromagnet. There is a disclosure of a configuration in which an alarm device is mounted on a base (lock base) configured in a case shape and a permanent magnet is provided on an operation lever. With this configuration, when the crescent is illegally rotated, the magnet sensor detects a magnetic change from the permanent magnet provided on the operation lever and outputs a detection signal to the microcomputer. Ring.

Japanese Utility Model Publication No. 56-16755 (Fig. 1-2) Japanese Patent Laying-Open No. 2005-113637 (FIGS. 1 and 8) Japanese Patent Laying-Open No. 2005-9195 (FIGS. 1 and 4)

  In the configuration of the crescent lock with a security buzzer as in Patent Document 1, the alarm circuit power switch is arranged in the vicinity of the crescent of the indoor side shoji summon bowl. If destroyed, the power switch of the alarm circuit is easily turned off and the security buzzer does not sound. In addition, when the wiring between the reed switch and the security buzzer is cut, the security buzzer does not ring.

  Moreover, in the structure of the crescent lock with a security buzzer like patent document 2 and patent document 3, since an alarm device is arrange | positioned in the vicinity of the crescent of the summoning bowl of an indoor side shoji, the structure which turns on and off operation | movement of an alarm device In the configuration in which the on / off switch is provided, when the glass near the crescent lock is partially broken by an intruder, the on / off switch is easily turned off and the security buzzer does not sound. The alarm device includes a power supply unit, an abnormality detection sensor, a microcomputer, an alarm unit, a magnet sensor that detects rotation of the operation lever (operation unit), a voltage monitoring unit, a display lamp, and an electromagnet. There is a problem in that the structure is complicated, the manufacturing cost increases, and the reliability decreases. In addition, since the outer shape of the alarm device is relatively large, for example, it is necessary to perform processing on the sash of the indoor side shoji of the window sash and attach it, and there is a problem that the design of the crescent lock is impaired. .

  Therefore, in view of the situation described above, the present invention intends to solve the problem that the power switch of the alarm circuit is not easily turned off even if the glass near the crescent lock is partially broken by an intruder. The present invention is to provide a crescent lock with a security buzzer that has a simple configuration and excellent practicality, even if the wiring between the reed switch and the security buzzer is cut off.

  The crescent lock with a security buzzer according to the present invention is a crescent lock in which a pedestal for pivotally supporting the crescent is attached to an indoor shoji summon and a crescent receptacle is attached to an outdoor shoji summon. The sensor case that holds the reed switch that is turned on close to the permanent magnet is provided in the locked state of the crescent lock. Removably attached to the pedestal so that the switch is turned on, an alarm circuit consisting of a security buzzer, a power supply for the buzzer and a power switch, and the alarm circuit is opened in response to the reed switch being turned on, and the reed switch is turned off. Alarm means consisting of switching means for closing the alarm circuit in response to the The alarm lever and the reed switch in the sensor case are connected by a cable, and in a state where the power switch of the alarm circuit is turned on, the operation lever is rotated from the locked position, Alternatively, when the cable between the reed switch and the alarm means is disconnected, the alarm circuit is closed and the security buzzer sounds.

  According to the crescent lock with a security buzzer according to the present invention, a crescent lock is formed by attaching a pedestal that supports the crescent so as to be pivotable to an indoor shoji summon and a crescent receptacle attached to an outdoor shoji summon. The sensor case that holds the reed switch that is turned on in the vicinity of the permanent magnet is provided in the operation lever that rotates integrally with the crescent to house the permanent magnet, and the crescent lock is locked. The reed switch is detachably attached to the pedestal so that the reed switch is turned on, an alarm circuit comprising a security buzzer, a power supply for the buzzer and a power switch, and the reed switch is opened in response to the reed switch being turned on. The alarm means comprising the switching means that closes the alarm circuit in response to the turning off of the alarm means a crescent such as a lower or upper part of the indoor shoji The alarm lever is connected to the reed switch in the sensor case by a cable, and the operation lever is rotated from the locked position when the alarm circuit power switch is turned on. Or, if the cable between the reed switch and the alarm means is cut, the alarm circuit will be closed and the buzzer will sound, so the alarm circuit power switch is separated from the crescent lock, Even if the glass near the crescent lock is partially broken by a person, the power switch is not easily turned off. In addition, since the switching means is in the alarm means attached at a position separated from the crescent lock, even if the cable between the reed switch and the alarm means is disconnected, the switching means is turned on by the disconnection, and the alarm The buzzer can be sounded with the circuit closed. In addition, the structure is simple while increasing the security against intrusion caused by breaking the glass in this way, so the increase in cost due to the addition of the security function can be suppressed, and a more practical crescent lock with a security buzzer can be obtained. Can do. In addition, the operation lever is provided with a storage portion to store a permanent magnet, and a sensor case holding the reed switch is detachably attached to the base, without removing the crescent lock itself from the existing crescent lock, Since the permanent magnet and the reed switch can be attached without actual processing, a security function can be easily added to the existing crescent lock. Moreover, even if such a crime prevention function is added, the shape of the crescent lock only increases the size of the compact sensor case, does not cause any sense of incongruity, and does not impair the design.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste. In the present specification, the front side in the direction from the indoor side to the outdoor side is the front, the rear side is the rear, and the left and right are the left and right toward the front. Moreover, let the figure seen from the indoor side be a front view.

  1 and 2 are explanatory views showing an example in which a crescent lock with a security buzzer according to the present invention is attached to a sash, FIG. 1 is a front view, and FIG. 2 is a cross-sectional plan view around the crescent lock. 3 to 6 are explanatory views of a configuration example of a crescent lock with a security buzzer according to the present invention, FIG. 3 is an overall configuration diagram, FIG. 3 (a) is a front view, and FIG. 3 (b) is a left side. FIG. 4 is a longitudinal front view of the crescent lock, FIG. 5 is an exploded front view of the crescent lock, and FIG. 6 is a circuit configuration diagram.

  As shown in FIGS. 1 and 2, the pedestal 2 of the crescent lock 1 with a security buzzer is attached to a summing bowl 103 of an indoor side shoji 101 fitted with glass 105, and the crescent receptacle 10 is fitted with glass 106. It is attached to the summon basket 104 of the outdoor shoji 102. The crescent 4 is supported by the pedestal 2 so as to be rotatable about a horizontal axis A in the left-right direction, and is operated by an operation lever 5 that is fixed to the main body of the crescent 4 with a cap 7 and rotates integrally with the crescent 4. Therefore, when the operation lever 5 is operated and the crescent 4 is rotated around the horizontal axis A in the left-right direction to engage the engagement plate 4a with the crescent receiver 10, the shojis 101 and 102 constituting the sliding sash are closed. It is locked in a state and becomes a locked state. The alarm means 31 is attached to the position separated from the crescent lock below the indoor side shoji 101 using a double-sided tape or the like.

  As shown in FIG. 3, the alarm means 31 is connected to the reed switch 21 attached to the base 2 by a cable 40, and permanent magnets 11, 11 are built in the operation lever 5. As shown in FIG. 4, the pedestal 2 is attached to the summoning rod 103 by means of mounting screws 8 and 8, and a locking step portion 3a and a convex portion 3b are formed in the cover locking portion 3 above the pedestal 2. Therefore, when the locking claw 9a of the screw cover 9 is locked to the locking step portion 3a, the screw cover 9 is attached to the base 2 in a stable state while covering the screw 8, and can be easily removed. The reed switch 21 is a device that opens and closes a reed piece in a glass tube sealed with an inert gas and shielded from outside air, and has very high contact reliability. Therefore, the reed switch 21 has high reliability over a long period of time. Can be maintained.

  Since the locking step portion 3a and the convex portion 3b are also formed in the cover locking portion 3 below the pedestal 2, the screw cover 9 can be mounted in the same manner as described above. As will be described later, the sensor case 22 to which the reed switch 21 is fixed can be attached without using the locking portion 3 to perform the actual processing on the summon box 103 of the indoor side shoji 101. That is, the locking claw 22a of the sensor case 22 may be locked to the locking step 3a of the cover locking portion 3 at the bottom of the base 2.

  As shown in FIGS. 4 and 5, the operation lever 5 is formed with an accommodating portion 6 having an opening on the side facing the pedestal 2. The accommodating portion 6 has permanent magnets 11, 11 and the permanent magnet. 11 and 11 are accommodated, and a back cover 13 is attached to the opening of the accommodating portion 6. In addition, the reed switch 21 is formed on a surface of the sensor case 22 facing the operation lever 5 by a locking claw (not shown) integrally formed on the inner surface side of the sensor case 22 or a mounting plate separate from the sensor case 22. Installed inside. Then, a cable 40 connected to the terminals 21a and 21b at both ends of the reed switch 21 (with the electric wire covered with an insulator such as vinyl) is drawn out from the cable drawing hole 22a shown in FIG. As shown in FIG.

  With the configuration as described above, the permanent magnets 11 and 11 and the reed switch 21, which are detection means for detecting illegal rotation of the operation lever 5 (crescent 4), are connected to the existing crescent lock. Can be attached without removing. In addition, the permanent magnets 11 and 11 can be attached to the operation lever 5 without performing actual processing of the operation levers, and the reed switch 21 and the alarm means 31 can be attached to the summing pad 103 of the indoor side shoji 101. Since it is possible to perform the actual processing of the summon bowl 103, a security function can be easily added to the existing crescent lock. In addition, even if a crime prevention function is added, the shape of the crescent lock is merely a slightly larger portion of the compact sensor case 22 and does not cause any sense of incongruity and does not impair the design.

  Next, the configuration and operation of the alarm unit 31 will be described. As shown in FIG. 6, the alarm means 31 includes a security buzzer 32, a power circuit 33 of the security buzzer 32 and an on / off switch 34 which is a power switch, and an alarm circuit corresponding to the reed switch 21 being turned on. And an NPN transistor 35 which is a switching means for closing the alarm circuit in response to the reed switch 21 being turned off. The base B of the NPN transistor 35 is connected between the power source 33 and the on / off switch 34 via resistors 37 and 36, and the collector C of the NPN transistor 35 is connected to the on / off switch 34 via a coil 38. And the security buzzer 32, and the emitter E of the NPN transistor 35 is connected to the power source 33. A cable 40a connected to one terminal 21a of the reed switch 21 is connected between the emitter E of the NPN transistor 35 and the power source 33, and a cable 40b connected to the other terminal 21b of the reed switch 21 is connected. The resistor 37 and the resistor 36 are connected.

  Since the security buzzer 32 does not sound in the state where the on / off switch 34 which is a power switch is turned off, the on / off switch 34 may be turned off if the alarm means 31 is not desired to act. When the alarm means 31 is activated at night or when going out, the crescent lock is set in the locked state, and then the on / off switch 34 is turned on to set the alarm standby state. If the crescent lock is in the locked state, the permanent magnet 11 built in the operation lever 5 is in the vicinity of the reed switch 21 mounted in the sensor case 22 on the base 2 side as described above, and the reed piece in the reed switch 21 The external magnetic field acts on the magnetic field and is attracted, and the reed switch 21 is turned on. In this state, since the base current for allowing a current to flow between the collector C and the emitter E of the NPN transistor 35 does not flow, the NPN transistor 35 is turned off. Therefore, the alarm circuit is opened and no current flows through the coil 38, so that the security buzzer 32 does not sound.

  In this way, in the alarm standby state where the crescent lock is locked and the on / off switch 34 is turned on, when the intruder breaks the vicinity of the crescent lock of the glass 106 and the operating lever 5 is rotated, the permanent magnet 11 moves in a direction away from the reed switch 21, the external magnetic field does not act on the reed piece in the reed switch 21, and the reed switch 21 is turned off. In this state, since a base current for flowing a current flows between the collector C and the emitter E of the NPN transistor 35, the NPN transistor 35 is turned on. Therefore, the alarm circuit is closed, current flows through the coil 38, and current flows through the closed circuit including the coil 39 and the security buzzer 32 due to electromagnetic induction, so that the security buzzer 32 sounds and this state continues.

  In this state, the alarm buzzer 32 will not stop ringing unless the on / off switch 34 of the alarm means 31 is turned off, but the alarm means 31 is attached to a position separated from the crescent lock below the indoor shoji 101. Therefore, the on / off switch 34 is not easily turned off. Even if the on / off switch 34 is turned off before the operation lever 5 is rotated, it is necessary to locate the alarm means 31 and break the glass 106 or 105 in the vicinity of the alarm means 31. Become. Accordingly, since the effect of suppressing illegal intrusion is increased, the crime prevention property is improved. The alarm means 31 may be attached to the upper part of the indoor side shoji 101 instead of the lower part, or may be attached to a free position away from the crescent lock in the indoor side shoji 101. Furthermore, the alarm means 31 can be hidden so that it cannot be visually recognized from the outside of the glasses 105 and 106. If the alarm means 31 is made invisible from the outside, the crime prevention property against intrusion due to glass breakage can be further enhanced.

  The reed switch 21 and the alarm means 31 are connected by the cable 40. As described above, since the NPN transistor 35 constituting the switching means is provided on the alarm means 31 side, the cable 40 is disconnected by an intruder. Even if this is the case, this is equivalent to the state in which the reed switch 21 is turned off. In this state, the security buzzer 32 sounds without the operation lever 5 being rotated. Accordingly, unless the intruder turns off the on / off switch 34 of the alarm means 31, there is no means for unlocking the crescent lock by rotating the operation lever 5 without sounding the security buzzer.

  The permanent magnet 11, the reed switch 21 and the alarm means 31 having a simple configuration as described above can suppress an increase in cost while adding an effective crime prevention function to the existing crescent lock. Since there is no sense of incongruity in the appearance, it is possible to realize an extremely practical crescent lock with a security buzzer.

It is a front view which shows the example which attached the crescent lock with a crime prevention buzzer which concerns on this invention to a sliding sash. It is a cross-sectional plan view around the crescent lock. It is a whole block diagram of the structural example of the crescent lock with a crime prevention buzzer which concerns on this invention. It is a longitudinal front view of a crescent lock. It is a disassembled front view of a crescent lock. It is a circuit block diagram similarly.

Explanation of symbols

A Horizontal shaft 1 Crescent lock with security buzzer 2 Base 3 Cover locking portion 3a Locking step portion 3b Protruding portion 4 Crescent 4a Engaging plate 5 Operation lever 6 Housing portion 7 Cap 8 Mounting screw 9 Screw cover 9a Locking claw 10 Crescent receiver DESCRIPTION OF SYMBOLS 11 Permanent magnet 12 Iron piece 13 Back cover 21 Reed switch 21a, 21b Terminal 22 Sensor case 22a Locking claw 22b Cable extraction hole 31 Alarm means 32 Security buzzer 33 Power supply 34 Power switch (ON / OFF switch)
35 Switching means (NPN type transistor)
36, 37 Resistance 38, 39 Coil 40 Cable 101 Indoor side shoji 102 Outdoor side shoji 103, 104 Summon 105, 106 Glass

Claims (1)

A crescent lock with a pedestal that supports the crescent pivotably attached to an indoor shoji summon and a crescent receptacle attached to an outdoor shoji summon.
A housing part is provided in the operating lever that rotates integrally with the crescent to house the permanent magnet,
A sensor case holding a reed switch that is turned on in the vicinity of the permanent magnet is detachably attached to the base so that the reed switch is turned on in the locked state of the crescent lock,
A security buzzer, an alarm circuit comprising a power supply of the buzzer and a power switch, and switching means for opening the alarm circuit in response to the reed switch being turned on and closing the alarm circuit in response to the reed switch being turned off. Attach the alarm means to the position separated from the crescent lock such as the lower or upper part of the indoor shoji,
The alarm means and the reed switch in the sensor case are connected by a cable,
When the power switch of the alarm circuit is turned on, the alarm circuit is closed when the operation lever is rotated from the locked position or the cable between the reed switch and the alarm means is disconnected. Crescent lock with security buzzer, characterized by a buzzer.

Images