JP4203570B2 - Alarm device dropout prevention mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an alarm device used by being attached to a ceiling or a wall surface, and particularly to an alarm device drop-off prevention mechanism provided so as not to drop the alarm device when the alarm device is removed.
[0002]
[Prior art]
As shown in FIG. 1, a conventional alarm device is used by attaching a main body 2 to a base portion 1 fixed to a ceiling surface. When the main body is removed from the base portion, a coupling provided on the base portion or the main body side is used. In accordance with the operation of a lever (not shown) for releasing the mechanism, the body is moved away from the base by its own weight.
[0003]
[Problems to be solved by the invention]
In the conventional alarm device, in order to remove the main body from the base portion, the main body must be supported at the same time when the lever for releasing the coupling mechanism is operated. Because of having to use both hands in this way, there is a high possibility of accidents such as poor workability at high places close to the ceiling surface, accidental dropping of the main body, or falling of the operator himself Was a problem.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention adds a mechanism for temporarily holding the alarm device between the main body and the base portion, and operates the alarm device main body with the base portion by operating with one hand. It can be removed from.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 shows the alarm device of the present invention, and is a view showing a state in which a drop-off prevention mechanism is activated when the main body 2 is removed from the base portion 1 fixed to the ceiling. The main body 2 is held by the hook 5 on the lower surface of the base portion 1 with the provided band-shaped surface fastener 3 and the surface fastener 4 on the main body side, and the main body 2 is held in a form suspended by the fastener. Yes. FIG. 3 shows a central section in this state. The convex part 8 of the main body 2 is coupled to the concave part 7 provided in the base part 1, and the main body 2 is merged with the base 1 in this state, and the concave part 9 provided in the main body 2 is a lock as a coupling mechanism provided in the base part 1. It is fixed by the mechanism 6. When the main body 2 is fixed to the base portion 1, the band-shaped hook-and-loop fastener 3 is folded into a small space between the main body 2 and the base portion 1 while being engaged with the hook-and-loop fastener 4 on the main body side. It comes to fit in the form.
When the lock mechanism 6 is operated, the concave portion 9 of the main body 2 is detached from the lock fitting, and tries to rotate using the portion where the concave portion 7 of the base portion 1 and the convex portion 8 of the main body 2 are in contact with each other. Then, the belt-shaped hook-and-loop fastener 3 is deformed so that its loop shape extends, and stops when it is fully extended. FIG. 3 shows the state at this time.
Further, when the sensor main body is pulled downward from this state, the hook-and-loop fastener is detached, and the main body 2 is completely separated from the base portion 1.
[0006]
【The invention's effect】
As described above, according to the dropout prevention mechanism of the alarm device of the present invention, the operation of releasing the coupling mechanism and the subsequent operation of separating the main body and the base portion are performed separately. However, it no longer drops the body.
The hook-and-loop fastener used in the present invention suffices with a so-called Velcro (trademark) that is frequently used as a detachable engaging hook-and-loop fastener, and can be used at any number of places as required. For this reason, even if it is the structure which the structure which the whole main body leaves | separates with the cancellation | release of a coupling mechanism, it can employ | adopt, and an application range is wide.
Since a hook-and-loop fastener made of fabric is used, it becomes a small shape when the main body is fixed to the base portion, and the storage space is small.
In addition, since the belt-shaped hook-and-loop fastener is formed in a loop shape with the engagement surface on the outside, the engagement surface is always positioned below just by hooking it on the hook of the base part. There are fewer restrictions.
[Brief description of the drawings]
FIG. 1 is a diagram showing a conventional alarm device. FIG. 2 is a diagram showing an alarm device of the present invention. FIG. 3 is a mechanism for preventing the alarm device from falling off.
DESCRIPTION OF SYMBOLS 1 Base part 2 Main body 3 Band-shaped hook-and-loop fastener 4 Surface fastener 5 Hook 6 Lock mechanism 7 Concave part 8 Convex part 9 Concave part

Claims (1)

It consists of a base part that is fixed directly to the ceiling, etc., and a main body that is fixed to the base part. In the alarm device configured to be performed by a force acting in the separation direction, a hook is provided on the lower surface of the base portion, a hook-and- loop fastener is fixed at a position corresponding to the hook on the upper surface of the main body, and an engagement surface is formed on the outer side. When the belt-shaped hook-and-loop fastener formed in a loop shape is passed through the hook provided on the lower surface of the base portion and the main body is fixed to the base portion, the belt-shaped hook-and-loop fastener A mechanism for preventing the alarm device from falling off, wherein the alarm device is configured to be folded in a space between the main body and the base while being engaged .

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