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JPH0743690

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DESCRIPTION JPH0743690
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the
structure of a passive sensor for a warning system installed on a ceiling surface.
[0002]
2. Description of the Related Art FIGS. 3 and 4 show the structure of a conventional passive
sensor, respectively. Conventionally, as a passive sensor installed on the ceiling surface 10, an
exposure type passive sensor 11 installed so as to be exposed from the ceiling surface 10 as
shown in FIG. 3 and a ceiling surface 10 provided as shown in FIG. The recessed portion 12 has
the embedded passive sensor 14 installed via the decorative frame 13, and the lower surface of
each of the passive sensors 11 and 14 is formed in a curved surface.
[0003]
[Problems to be Solved by the Invention] The passive sensor only needs to function effectively
when it is in the alert set, and when there are people in the daytime and the alert is canceled As
much as possible, it is better for the installation to be as unobtrusive as possible. However, the
above-described conventional passive sensor is installed more than necessary because the
embedded passive sensor 14 is curved as well as the exposed passive sensor 11 as well as the
embedded passive sensor 11 and therefore the sameness with the ceiling surface 10 is weak. The
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condition was noticeable, and the design of the ceiling surface 10 was damaged.
[0004]
The present invention has been made to solve the above-mentioned problems, and a passive
sensor is installed so that its function can be sufficiently exhibited and that the aesthetic
appearance of the ceiling surface is not impaired. It aims at obtaining the structure of the passive
sensor which can be
[0005]
[Means for Solving the Problems] In order to solve the problems described above, the structure
of the passive sensor according to the present invention is a passive sensor for a warning system
installed on a ceiling surface, wherein the lower surface of the passive sensor is flat. A recess is
provided on the ceiling surface such that the flat lower surface of the passive sensor is flush with
the ceiling surface, and the recess is connected to a wire connected to a motor for raising and
lowering the recess; It is characterized in that the passive sensor is movably installed at the alert
release position stored in the recess and the alert set position exposed below the recess.
[0006]
Further, in the structure of the passive sensor according to the present invention, two of the
elevating motors are installed, and wires connected to each of the motors are connected to both
ends of the passive sensor, and the passive sensor at the alert set position. It is characterized in
that the set angle of can be changed.
[0007]
Since the structure of the passive sensor according to the present invention is configured as
described above, when the warning is not used, the passive sensor is firstly aesthetically placed
within the recess in the ceiling surface. By storing the flat lower surface in the same plane as the
ceiling surface, it is possible to assimilate to the ceiling surface and make the installation of the
passive sensor inconspicuous, while at the time of alert set using the passive sensor, it is given
priority in function By activating the elevating motor, the passive sensor can be lowered from the
inside of the recess to below the ceiling surface and moved to a position where the function can
be sufficiently exhibited.
[0008]
Further, since two lifting motors for lifting and lowering the passive sensor are provided, the
position and angle in the alert set state of the passive sensor can be arbitrarily changed by
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controlling the time for which each motor is energized. be able to.
[0009]
Embodiments of the present invention will be described below based on FIGS. 1 and 2. FIG.
FIG. 1 is a block diagram showing the state of the passive sensor structure at the time of alert
release, and FIG. 2 is a block diagram showing the state at the alert set of the passive sensor
structure.
The ceiling surface 1 is provided with a recess 2 for installing the passive sensor 3.
The recess 2 can accommodate the passive sensor 3 and has a depth such that the lower surface
of the passive sensor 3 can be accommodated so as to be flush with the ceiling surface 1 when
the passive sensor 3 is not used.
[0010]
On the other hand, when the passive sensor 3 is stored in the recess 2 at the time of warning
release, the lower surface has a flat planar shape so that the lower surface becomes the same
surface as the ceiling surface 1 as described above. It is formed.
In addition, two lifting motors 4 and 5 are installed above the recess 2 on the ceiling at intervals,
and one end of each of the wires 6 and 7 is wound around the rotation axis of the lifting motor.
The wires 6 and 7 can be fed out and wound up by forward rotation and reverse rotation of 4
and 5, respectively.
[0011]
The other ends of the wires 6, 7 are connected to both ends of the passive sensor 3, respectively,
whereby the lifting motors 4, 5 are forwardly or reversely rotated, and the wires 6, 7 are fed out
or wound up. The passive sensor 3 can be moved to the alert release position in which the
passive sensor 3 is housed in the recess 2 and the alert set position exposed below the ceiling
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surface 1 from the recess 2 when the passive sensor 3 is set to the alert set position; It is
necessary to adjust the position and angle so that it can exhibit its function sufficiently, and set it,
but control the energizing time to the two lifting motors 4 and 5 respectively to change the
feeding length of the wires 6 and 7 As a result, the required position and angle change can be
made. Furthermore, 8 in the figure is a signal line drawn from the passive sensor 3.
[0012]
According to the above embodiment, at the time of warning release when there is a daytime
person and there is no need to use the passive sensor 3, the raising and lowering motors 4 and 5
are rotated to wind the wires 6 and 7 passively. The sensor 3 is raised and stored in the recess 2
of the ceiling surface 1 and the lower surface of the passive sensor 3 is made flush with the
ceiling surface 1 and the passive sensor 3 is not noticeable more than necessary You can do so.
Therefore, it is possible to maintain the aesthetic appearance of the ceiling surface 1 with the
appearance first at the time of warning release.
[0013]
On the other hand, at the time of warning set, the raising and lowering motors 4, 5 are rotated to
feed the wires 6, 7 and the passive sensor 3 is lowered from the recess 2 and exposed below the
ceiling surface 1 to move to the warning set position. Do.
In this state, since the passive sensor 3 is completely exposed from the ceiling surface 1, the
function as the sensor can be sufficiently exhibited with the function first, and the setting
position and angle of the passive sensor 3 can be improved. The adjustment positions of the
wires 6, 7 can be adjusted by controlling the energizing times of the lifting motors 4, 5
respectively, so that the set position and angle can be optimized.
[0014]
As described above, according to the structure of the passive sensor according to the present
invention, the passive sensor is completely exposed from the ceiling surface with the function
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first at the time of warning set, and the function is sufficiently exhibited. On the other hand, at
the time of warning release, the passive sensor is housed in the recess on the ceiling surface in
the first appearance, and the flat bottom surface is made identical to the ceiling surface, so that
the design of the ceiling surface is not hindered. be able to. Therefore, both the function and the
appearance can be improved. In addition, since the position and angle of the passive sensor in a
caution set position can be adjusted optimally with two raising / lowering motors, the further
functional improvement can be aimed at.
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