JPH09138893A - Crime prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To issue an alarm by surely detecting the opening/closing operation of a sliding door installed at the doorway, a window, etc., of a room. SOLUTION: A roller cam 4 is installed to a crime prevention buzzer main body 1 freely rotatably with a rotation axis in a center. At the bottom face of the roller cam 4, the recessed parts 5 and the projecting parts 6 respectively at two places are formed alternately every 90 angular degree. A push lever switch 10 is arranged by abutting a penetrating pin 11 to the bottom face of the roller cam 4. Then the roller cam 4 is in contact with the sliding door through an O ring 8 and supported by a spring supporting part 9 to be installed to the crime prevention buzzer main body 1 freely oscillatably in a direction orthogonal to the contact face with the sliding door. When the roller cam 4 is rotated with the opening/closing operation of the sliding door, the recessed parts 5 and the projecting part 6 are rotated to move the penetrating pin 11 up and down to turn the push lever switch 10 on/off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crime prevention device which detects an opening / closing operation of a sliding door installed at an opening / closing part such as a doorway or a window of a room and issues an alarm.

[0002]

2. Description of the Related Art Conventionally, a crime prevention buzzer has been widely used which detects an opening / closing operation of a sliding door installed at an entrance / exit of a room or a window using a sensor portion including a reed switch and a hall element and generates an alarm sound. It is used. This security buzzer uses a reed switch or a sensor part that combines a hall element and a magnet, and when a pair of sliding doors is opened from a completely closed state, it detects the opening and closing operation of the sliding doors and issues an alarm. ing. In this security buzzer, a sensor unit is arranged at a predetermined position in order to detect the opening / closing operation of the sliding door. That is, the reed switch or the hall element is arranged at a predetermined position of one sliding door, and the magnet is arranged at a corresponding position of the other sliding door. Here, when the pair of sliding doors are opened from the completely closed state, the relative position of the reed switch or the hall element and the magnet changes, and the magnetic field generated in the reed switch or the hall element also changes. Can detect the opening / closing operation of the sliding door.

[0003]

In the crime prevention buzzer having the above-mentioned structure, the sensor portion is arranged at a predetermined position in order to detect the opening / closing operation from the state where the sliding door is completely closed, and the sliding door is completely closed. The security buzzer is activated when closed. Therefore, when the sliding door is slightly opened for ventilation or ventilation, the position of the reed switch or Hall element and the magnet is different from the predetermined position, so the security buzzer may not be able to detect the opening / closing operation of the sliding door. there were.

Further, when a gap or a step occurs in the pair of sliding doors provided with the security buzzer, the relative distance between the reed switch or the hall element and the magnet changes due to the gap or the step, and the reed switch or the hall element. The security buzzer may malfunction because the magnetic field generated in the field changes. Therefore, in order to prevent malfunction of the sensor unit, it is necessary to absorb the gaps and steps between sliding doors,
When a slide mechanism for absorbing gaps, steps, etc. is attached to the security buzzer, the structure of the slide mechanism becomes complicated, so that the security buzzer becomes large and the manufacturing cost becomes high.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a small and inexpensive crime prevention device which can be operated regardless of the open / closed state of a sliding door. .

[0006]

According to the present invention, in order to achieve the above object, a sensor section, an alarm generating section for generating an alarm such as sound or light based on a detection signal of the sensor section, and an alarm generating section. A first switch for switching ON / OFF of the roller cam, the sensor unit converts the opening / closing operation of the sliding door into a rotational movement, and a concave portion and a convex portion formed on a surface orthogonal to the rotational axis of the roller cam. It is configured by a second switch that is turned on / off by the part, and it can be easily attached to the sliding door, and if the roller cam makes one rotation by the opening / closing operation of the sliding door, the alarm generator detects the opening / closing operation of the sliding door. can do.

Further, according to the invention of claim 2, the bearing portion of the roller cam is provided with a roller cam supported by a spring so as to be swingable in a direction orthogonal to a contact surface between the roller cam and the sliding door. It is possible to absorb a gap or a step generated between the pair of sliding doors.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the crime prevention buzzer of the present embodiment includes a crime prevention buzzer body 1, a cover 2 attached to the crime prevention buzzer body 1, and a crime prevention buzzer attached to the right side surface of the crime prevention buzzer body 1. Slide switch 3 for switching the operating state of, the disk-shaped roller cam 4 for converting the opening and closing operation of the window in which the security buzzer body 1 is installed into a rotational movement about the rotational axis 7, and the lower surface of the roller cam 4. The two fan-shaped concave portions 5 and the convex portions 6 formed alternately at every 90 degrees, the O-ring 8 attached to the peripheral edge portion of the roller cam 4 to prevent the roller cam 4 from slipping, and the roller cam 4
ON / OFF by a spring support portion 9 that supports the bearing portion of the roller cam 4 swingably in a direction orthogonal to the contact surface between the roller cam and the window frame, and a concave portion 5 and a convex portion 6 formed on the lower surface of the roller cam 4. Push lever switch 10, a buzzer 14 that generates an alarm sound based on the ON / OFF state of the push lever switch 10, a button battery 12 that supplies operating power for the security buzzer, and the security buzzer main body 1 as a window frame. It is composed of a felt 13 with an adhesive for fixing by adhesion. Here, the push lever switch 10 is installed by abutting the push pin 11 on the lower surface of the roller cam 4, and when the recess 5 of the roller cam 4 is located above the push pin 11, the push pin 11 is extended. Then, the push lever switch 10 is turned off.
On the other hand, when the protrusion 6 of the roller cam 4 is located above the push pin 11, the push pin 11 is pushed down and the push lever switch 10 is turned on. By the way, on the lower surface of the disc-shaped roller cam 4,
Since each of the two fan-shaped concave portions 5 and convex portions 6 is formed every 90 degrees, the push lever switch 10 is turned on and turned off while the roller cam 4 makes one rotation. It switches to the state twice.

Next, the mounting state of the security buzzer of this embodiment will be described with reference to FIG. The security buzzer of this embodiment is installed to detect an opening / closing operation of a pair of window frames 15a and 15b provided with glass surfaces 16a and 16b, respectively, and generate an alarm sound. The crime prevention buzzer main body 1 makes the roller cam 4 contact the window frame 15b on the outdoor side through the O-ring 8 so that the felt-attached felt 1 is attached to the window frame 15a on the indoor side.
3 is used for adhesive fixation. Here, the bearing portion of the roller cam 4 is supported by the spring support portion 9, and the roller cam 4 is attached to the crime prevention buzzer body 1 so as to be swingable in a direction orthogonal to the contact surface with the window frame 15b. The roller cam 4 is pressed against the window frame 15b,
The crime prevention buzzer body 1 is attached in a pushed state. Therefore, even when a gap or a step is generated between the window frames 15a and 15b, the spring support portion 9 causes the roller cam 4 to move.
Is pressed against the window frame 15b, the window frames 15a, 15a
It is possible to absorb a gap or a step generated between b, and the roller cam 4 reliably follows the opening / closing operation of the window frames 15a and 15b. The O-ring 8 mounted on the peripheral edge of the roller cam 4 increases the frictional force generated between the roller cam 4 and the window frame 15b.
Converts the opening / closing operation of the window frames 15a and 15b into a rotational movement without slipping.

At this time, the window frame 15a is moved leftward, or
When the window frame 15b is opened to the right, the roller cam 4 rotates clockwise. When the roller cam 4 makes one rotation clockwise or counterclockwise, the push lever switch 1 is pushed by the concave portion 5 and the convex portion 6 provided on the lower surface of the roller cam 4.
The push pin 11 of 0 moves up and down. Therefore, the push lever switch 10 shifts from the on state to the off state or from the off state to the on state as the push pin 11 moves up and down. An alarm circuit (not shown) provided inside the security buzzer main body 1 has a window frame 15 when the push lever switch 10 is switched from an off state to an on state.
It is determined that a and 15b have been opened, and the buzzer 14 is used to generate an alarm sound. Here, once the alarm circuit emits an alarm sound, it continues to emit an alarm sound until the slide switch 3 attached to the right side surface of the security buzzer body 1 is set to the off side. If the slide switch 3 is set to the off side to cancel the alarm and then the slide switch 3 is set to the on side, the alarm circuit is activated again. When the roller cam 4 rotates clockwise or counterclockwise once by opening / closing the window frames 15a and 15b and the push lever switch 10 switches from the off state to the on state, the alarm circuit causes the window frame 15a to operate. , 15b is judged to have been opened, and the buzzer 14 is used to emit an alarm sound. Therefore, in the security buzzer of this embodiment, regardless of whether the window is open or closed,
The security buzzer can be activated.

Therefore, the security buzzer according to the present embodiment, regardless of the ON / OFF state of the push lever switch 10,
While the roller cam 4 makes one rotation clockwise or counterclockwise, at least once, the push lever switch 10
Is switched from the off state to the on state, it is possible to detect the opening / closing operation of the sliding door. By the way, as shown in FIG. 1C, the push-in pin 11 of the push lever switch 10 has a contact point between the roller cam 4 and the window frame and the rotating shaft 7.
Since it is located on the extension line of the above, even if the roller cam 4 is pushed into the alarm buzzer main body 1 when the security buzzer is attached, the portion (the concave portion 5 or the convex portion 6) with which the push-in pin 11 is in contact does not change. Since it is not present, the switch state of the push lever switch 10 does not change, and the security buzzer does not malfunction during installation.

In this embodiment, it is used to detect the opening / closing operation of the pair of sliding doors, but it may be used in the opening / closing portion composed of one sliding door and the wall surface. That is,
The roller buzzer 4 is brought into contact with the wall surface, and the crime prevention buzzer body 1
May be attached to the sliding door to detect the opening / closing operation of one sliding door. Further, in the present embodiment, when the push lever switch 10 is switched from the off state to the on state, the alarm circuit determines that the sliding door is opened, but the push lever switch 10 is switched from the on state to the off state. If so, it may be determined that the sliding door has been opened.

[0013]

As described above, the invention of claim 1 turns on / off the sensor section, the alarm generation section for generating an alarm such as sound and light based on the detection signal of the sensor section, and the alarm generation section. A first switch for switching, the sensor unit converts the opening / closing operation of the sliding door into a rotational movement, and a roller cam,
Since it is composed of a second switch that is turned on / off by a concave portion and a convex portion formed on a surface orthogonal to the rotation axis of the roller cam, if the roller cam rotates once by opening / closing the sliding door, an alarm is generated. Since the generating unit can detect the opening / closing operation of the sliding door, there is an effect that the crime prevention device can be operated regardless of the opening / closing state of the sliding door.

According to the second aspect of the invention, the bearing portion of the roller cam is provided with a roller cam supported by a spring so as to be swingable in the direction of abutting against the sliding door. Since the gaps and steps can be absorbed, the crime prevention device can be prevented from malfunctioning with a simple mechanism, and a small and inexpensive crime prevention device can be realized.

[Brief description of the drawings]

FIG. 1A is a plan sectional view showing a crime prevention device according to the present embodiment. (B) It is a cross-sectional view of the above. (C) It is a vertical cross-sectional view of the above.

FIG. 2A is a top view showing the security device of the present embodiment. (B) It is a front view same as the above. (C) It is a right view of the above.

FIG. 3 is an external view showing a mounted state of the security device of the present embodiment.

[Explanation of symbols]

 1 Crime prevention buzzer main body 4 Roller cam 5 Recessed portion 6 Convex portion 7 Rotating shaft 8 O-ring 9 Spring support portion 10 Push lever switch 11 Push pin

Claims (2)

[Claims] 1. A sensor unit, an alarm generation unit for generating an alarm such as sound or light based on a detection signal of the sensor unit, and a first switch for switching ON / OFF of the alarm generation unit, The sensor unit includes a roller cam that converts an opening / closing operation of a sliding door into a rotational movement, and a second switch that is turned on / off by a concave portion and a convex portion formed on a surface orthogonal to the rotation axis of the roller cam. A security device comprising: 2. The roller cam bearing portion is supported by a spring, and is provided with the roller cam swingably mounted in a direction orthogonal to a contact surface between the roller cam and a sliding door. The security device according to claim 1.