JPH053993Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a far-infrared radiator detection and notification device that detects far-infrared rays emitted from people, automobiles, etc. and notifies them.

[Conventional technology]

A far-infrared emitter detection and notification device (hereinafter simply referred to as a detection and notification device) that detects far-infrared rays emitted by people and notifies them to notify people who are far away that a person has come to the entrance of a house or building. The device is constructed by housing a printed circuit board, which includes a sensor circuit for detecting far-infrared rays and a transmitter for notifying the output from the sensor circuit, in a box made of plastic stick, for example. A lens is provided at a predetermined portion of the box, and the lens focuses far infrared rays emitted from a person onto a sensor built into the box. This detection alarm device is installed on the wall or ceiling near the entrance so that it can detect people passing through the entrance.At this time, the direction of the detection area must be adjusted appropriately to ensure that the person entering the entrance can be detected. must be installed. The direction of this detection area can be determined by interposing a suitable pedestal between the box of the detection alarm device and the mounting surface such as a wall to create an appropriate angle between the detection alarm device and the mounting surface, or by setting an appropriate angle between the detection alarm device and the mounting surface. I prepared special mounting brackets that can be adjusted in various directions.

[Problem that the invention attempts to solve]

As mentioned above, conventional detection and alarm devices either require a pedestal between the box and the wall or use special mounting hardware to adjust the direction of the detection area. However, even if a large number of the pedestals are prepared, it is difficult to set the orientation of the detection area, and the range of adjustment angles cannot be freely adjusted. Further, when a dedicated mounting bracket is used, there is a problem in that the entire size of the detection and notification device including the mounting bracket becomes large.

The present invention has been made to solve the above problems.

An object of the present invention is to provide a far-infrared radiator detection and notification device that is small and can freely adjust the direction of the detection area.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Means for solving problems]

A brief overview of typical devices among the devices disclosed in this application is as follows.

That is, the end of the cylindrical body houses a sensor circuit device that detects far infrared rays emitted from people, cars, etc., and a transmitter that notifies the detection of far infrared rays by the output of the sensor circuit device. A gear having a concentric axis is provided, and a cylindrical body side support member for supporting a side surface of the cylindrical body is provided on a pedestal on which the cylindrical body is mounted, and the cylindrical body side support member is arranged to correspond to the position of the gear at the end of the cylindrical body. A cylindrical body end support member is provided on the pedestal, a circular shallow stepped portion having an axis concentric with the end surface is provided on the end surface of the cylindrical body, and a claw that engages with the step of the stepped portion is provided on the cylindrical body. A protrusion that is provided on the end face support member and engages with a gear portion on the end face is provided on the bottom of the pedestal via an elastic body to rotatably support the cylindrical body.

[Effect]

According to the above-mentioned means, a gear coaxial with the cylindrical body is provided at the end of the cylindrical body, and a cylindrical body side support that supports the side surface of the cylindrical body is provided on a pedestal on which the cylindrical body is mounted. a cylindrical body end face support member is provided on the pedestal in correspondence with the position of the gear at the end of the cylindrical body, and a shallow step on the end face of the cylindrical body has a circular shape concentric with the end face; The far-infrared radiator detection alarm is small and allows the setting of the direction of the detection area to be freely adjusted, since the end support member of the cylindrical body is provided with a claw that engages with the step of the step. You can get the equipment.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In addition, in all the figures for explaining the examples,
Components having the same function are given the same reference numerals, and repeated explanations thereof will be omitted.

Fig. 1 is an overall perspective view of a far-infrared ray emitter detection and notification device according to an embodiment of the present invention, Fig. 2 is a perspective view of the far-infrared radiator detection and notification device with the cover removed, and Fig. 3 is a perspective view of the pedestal of the far-infrared radiator detection and alarm device, FIG. 4 is a perspective view of the far-infrared radiator detection and alarm device when the rotation lock is turned over, and FIG. 5 is a perspective view of the far-infrared radiator detection and alarm device. Perspective view of the cylindrical body of the detection and alarm device. FIG. 6 is a perspective view of the circuit device inside the cylindrical body shown in FIG. 5 taken out.

As shown in FIG. 1, the far-infrared radiator detection and notification device (hereinafter referred to as the detection and notification device) 1 of this embodiment
This cylindrical body 100 houses a sensor circuit device that detects far infrared rays emitted from people, cars, etc., and a transmitter that notifies the detection of a far infrared radiator by the output of the sensor circuit device. A pedestal 300 on which the body 100 is mounted, a cylindrical body 100 and a pedestal 3
A cover 200 for covering 00 is provided. 109 is a Fresnel lens provided at a predetermined portion of the cylindrical body 100, which converges and irradiates far infrared rays emitted from the far infrared ray emitter onto the sensor inside the cylindrical body 100. The cylindrical body 100, cover 200, and pedestal 300 are made of plastic stick, and the Fresnel lens 109 is made of polyethylene.

As shown in FIG. 2, the cylindrical body 100 is cylindrical and can be divided into an upper cylindrical body 101 and a lower cylindrical body 102. As shown in FIG. A gear 105 having an axis concentric with the cylindrical body 100 is provided at both ends of the cylindrical body 100, and a central part of the gear 105 has a circular step concentric with the cylindrical body 100 and is slightly recessed from the side surface of the gear 105. Section 106. A shallow step 106A is provided between the gear 105 and the step portion 106. Grooves 103, 1 are formed on the side surface of the cylindrical body 100 slightly inside the gear 105.
04 is provided. The grooves 103 and 104 go around the side surface of the cylindrical body 100. Groove 103,
104 includes cylindrical body side support members 301 and 302, or 303 and 30 provided on the pedestal 300.
4 are fitted to support the side surface of the cylindrical body 100 in a slidable manner. Each cylindrical body side support member 301, 302, 303, 304
The surface in contact with the grooves 103, 104 is
It has almost the same curvature as 04. Also, pedestal 3
At positions corresponding to the gear 105 of the cylindrical body 100 of 00, cylindrical body end face support members 305 and 306 are provided. This cylindrical body end support member 30
5,306 has a shape like an upside down U, and is integrally formed with the base 300.
A pawl 307 that engages with the step 106A on the end surface of the cylindrical body 100 is provided on the surface of the cylindrical body end support members 305 and 306 facing the gear 105. By hooking this claw 307 on the step 106A, the cylindrical body 100 is prevented from easily coming off the pedestal 300. A fitting hole 203 of the cover 200 is provided on the side opposite to the side where the claw 307 of the cylindrical body end support members 305 and 306 is provided.
A protrusion 308 that fits into the cover 200 is provided, and a protrusion 309 is provided below the protrusion 308 for pushing the cylindrical body end support members 305 and 306 when the cover 200 is removed from the pedestal 300. The ends of the cylindrical body end support members 305 and 306 on the side where the claws 307 are provided are fixed to the pedestal 300, and the ends on the side where the projections 308 and the convex portions 309 are provided are fixed to the pedestal 300. do not have. Therefore, the cylindrical body end support members 305 and 306 have spring properties, and when the protrusion 309 is pressed, the protrusion 308 comes off from the fitting hole 203 of the cover 200, and the cover 200 is moved to the pedestal 300.
It is now possible to remove it from the

350 shown in FIG. 3, the cover 200 is
This is a rotation lock that locks the rotation of the cylindrical body 100 when attached to the cylindrical body 100.
A meshing protrusion 315 that meshes with the gear 105 of 0 is provided. The rotating lock 350 is made of plastic sticks, and is fixed to the base 300 by inserting hooks 314 provided on both sides thereof into the hook holes 312 of the base 300 and hooking them.
At this time, a plurality of small protrusions 3 are formed on the bottom surface of the pedestal 300.
13, the rotary lock 350 is mounted away from the bottom surface of the pedestal 300. However, the engaging protrusion 31 of the rotation lock 350
No small protrusion 313 is provided at the position corresponding to 5. This allows the rotary lock 350 to be attached to the base 300.
When attached to the rotary lock 350, the mating protrusion 315 portion of the rotary lock 350 is elastic. Note that 310 is a screw insertion portion into which a screw for attaching the pedestal 300 to a wall or ceiling is inserted, and a hole 311 is provided in the rotary lock 350 to correspond to this. As shown in FIG. 4, a small protrusion 317 is provided on the lower surface of the rotary lock 350. This protrusion 3
17 is for locking the cylindrical body 100 to prevent it from rotating when the cover 200 is attached to the pedestal 300, and the height of the protrusion 317 is the same as that of the pedestal 300.
It is lower than the small protrusion 313 of 00. Therefore, when the rotary lock 350 is mounted on the base 300, there is a gap between the protrusion 317 and the base 300.

The rotation lock 350 and the cylindrical body 100 are mounted on the base 300.
When attached to the cylindrical body side support member 30
1, 302, 303, 304 and the cylindrical body end support members 305, 306 support the cylindrical body 100, the pawl 307 engages with the step 106A on the end face of the cylindrical body 100, and the engaging protrusion 315 of the rotation lock 350 Since the cylindrical body 100 meshes with the gear 105, the cylindrical body 100 can be rotated in the circumferential direction without falling off. Rotary stoppers 10 are provided on both end faces of the cylindrical body 100.
7 is provided, and this rotation stopper 107 hits the cylindrical body end face support members 305 and 306, and the cylindrical body 1
It is designed to prevent rotation of 00. The cylindrical body 100 is moved from the rotation stopper 107 to the rotation stopper 1.
It can be rotated 180 degrees between 0 and 7.

Next, the rotational operation of the cylindrical body 100 will be explained using FIGS. 15 to 17.

15 and 16 are diagrams for explaining the state of the rotary lock 350 under the cylindrical body 100 when the cover 200 is not attached to the pedestal 300, and FIG. Rotating lock 35 under the cylindrical body 100 in the installed state
FIG. 3 is a diagram for explaining a state of 0.

As shown in FIGS. 15 and 16, the cover 2
00 is not attached to the pedestal 300, there is a sufficient gap between the protrusion 317 on the lower surface of the rotary lock 350 and the pedestal 300, so when the cylindrical body 100 is turned by hand, the engaging protrusion 315 of the rotary lock 350 and the gear The cylindrical body 100 rotates while the teeth 105 mesh with each other. At this time, the step 1 on the end surface of the cylindrical body 100
Since the claws 307 of the cylindrical body end support members 305 and 306 are hooked on 06A, the cylindrical body 100 is not lifted up, and the gear 10 is fixed as shown in FIG.
When the tooth No. 5 rests on the engaging protrusion 315, the rotation lock 350 is pushed down. However, even at this time, since there is a slight gap between the protrusion 317 and the base 300, the cylindrical body 100 can freely rotate without being prevented from rotating. On the other hand, the cover 200 is formed in such a size that it pushes down the cylindrical body 100 a little when it is attached to the pedestal 300, so as shown in FIG.
When the cover 200 is attached to the 00, the cylindrical body 1
00 is pushed down, and rotation lock 350 is also pushed down. For this reason, the protrusion 317 and the pedestal 3
00 becomes very small, and the cylindrical body 10
When attempting to rotate the gear 105, the protrusion 317 hits the base 300 before the teeth of the gear 105 can overcome the meshing protrusion 315, and the rotation is blocked. This prevents the cylindrical body 100 from rotating and the detection area moving after the detection and notification device 1 is installed on a wall, ceiling, etc., so the detection area set at the time of installation is maintained, and the detection and notification device 1 is Reliability can be increased.

As shown in FIG. 5, the cylindrical body 100 can be divided into an upper cylindrical body 101 and a lower cylindrical body 102. As shown in FIG. Mounting hooks 111 are provided at both ends of the upper cylindrical body 101, and by hooking these into the hook holes 110 of the lower cylindrical body 102, the upper cylindrical body 101 is attached to the lower cylindrical body. 102. A far-infrared radiator detection and notification circuit device (hereinafter simply referred to as a circuit device) 150 is mounted inside the lower cylindrical body 102 . 151 is a sensor for detecting far infrared rays, and 152 is a detection lamp consisting of a light emitting diode. Reference numeral 153 denotes a battery box into which AA batteries are loaded, and there are two of them. Electrodes 15 are provided at both ends of each battery box 153.
4 is provided, and the sensor circuit of the circuit device 150 and its output are used to supply power to a transmitter that notifies far-infrared detection. Note that when connecting the circuit device 150 and the receiver by wiring instead of wirelessly, punch out the wiring knock-out part 108 on the end face of the cylindrical body 100 to make a hole, and connect this hole to the pedestal 300 ( The wiring from the receiver is inserted into the cylindrical body 100 through the wiring hole 316 (FIG. 3). As shown in FIG. 6, the circuit device 150 can be removed from the lower tubular body 102. On both sides of the circuit device 150,
A lateral direction detection area adjustment projection 157 (hereinafter referred to as area adjustment projection) and a guide projection 158 are provided.
A rotary device support portion 112 is provided on the lower cylindrical body 102 in correspondence with 58 . battery box 153
Underneath is a printed circuit board 155 and a board hook 156.
It is attached in a fixed state by.
The board hook 156, area adjustment projection 157 and guide projection 158 are formed integrally with the battery box 153, and are made of plastic stick. However, the battery box 153 has no bottom plate and is open. In order to prevent the printed circuit board 155 below from being seen through the opening, a masking sheet 121 made of polyester is provided at the bottom opening of the battery box 153.

FIG. 7 shows an enlarged view of the area adjustment protrusion 157 and guide protrusion 158 of the circuit device 155, and FIG. 8 shows an enlarged view of the circuit device support portion 112 of the lower cylindrical body 102. .

The guide projection 158 of the circuit device 150 has a shape as shown in FIG. 7, and a guide groove 113 is provided in the lower cylindrical body 102 as shown in FIG. 8 to fit therewith. . 114 is a circuit device support table on which the bottom surface of the guide protrusion 158 of the circuit device 150 rests. The area adjustment protrusion 157 of the circuit device 150 has a shape as shown in FIG.
An area adjustment protrusion receiving portion 115 consisting of a plurality of grooves that engages with the area adjustment protrusion 157 is provided. The inner diameter of the lower cylindrical body 102 in the direction perpendicular to the rotational axis (longitudinal direction) of the cylindrical body 100 is large enough to accommodate the circuit device 150, so the circuit device 150 is inserted into the lower cylindrical body. 102, the guide protrusion 158 of the circuit device 150 fits into the guide groove 113, and the area adjustment protrusion 157
is engaged with the groove of the area adjustment protrusion receiving portion 115. This prevents the circuit device 150 from easily coming off the lower cylindrical body 102 or moving carelessly in the direction of the rotation axis. The length of the lower cylindrical body 102 in the rotational axis direction (longitudinal direction) is equal to the circuit device 15.
0, and by pushing and moving the circuit device 150 in the direction of the rotation axis, the position of the circuit device 150 within the lower cylindrical body 102 can be changed. As a result, the position of the sensor 151 in the rotation axis direction of the cylindrical body 100 changes,
The detection area of the detection and notification device 1 can be moved.

Since the area adjustment protrusion 157 and the area adjustment protrusion receiving portion 115 are made of plastic stick, their shapes can be formed with high precision. Further, since it is made of plastic stick which is harder than the printed circuit board 155, the peaks of the area adjustment protrusion 157 and the area adjustment protrusion receiving portion 115 will not chip when the circuit device 150 is moved. From these facts, the sensor 151 inside the cylindrical body 100
Since the position of the detection and notification device 1 can be determined with high precision, the reliability of the detection and notification device 1 can be improved.

Next, FIG. 9 shows a perspective view of the circuit device 150 viewed from below.

As shown in FIG. 9, the antenna 160 of the circuit device 150 is attached to an antenna support member 159 fixed perpendicularly to the printed circuit board 155 so as to be substantially parallel to the printed circuit board 155 and weighed. There is. Therefore, the antenna 160 can be placed in the empty space between the printed circuit board 155 and the lower cylindrical body 102.
0 can be made smaller. The antenna support member 159 is made of the same material as the printed circuit board 155.

Next, the structure of the Fresnel lens and the portion of the upper cylindrical body 101 to which the Fresnel lens is attached will be described with reference to FIGS. 10 to 13.

FIG. 10 is an enlarged perspective view of the Fresnel lens 109, FIG. 11 is a perspective view of the upper cylindrical body 101 seen from above with the Fresnel lens removed, and FIG. 12 is an enlarged perspective view of the upper cylindrical body 101. FIG. 13 is a plan view of the upper cylindrical body 10 shown in FIG. 12 when viewed from below.
FIG. 1 is a sectional view taken along the - section line of FIG.

As shown in FIG. 10, Fresnel lens 109
is six lenses 109A, 109B, 109C,
It consists of 109D, 109E, and 109F.
The upper surface of the Fresnel lens 109 has protrusions 1 along the four sides of the square Fresnel lens 109.
16 are integrally formed. Among the protrusions 116, the protrusions 116A on two sides of the Fresnel lens 109 are used to attach the Fresnel lens 109 to the upper cylindrical body 101, and the protrusions 116A on the remaining two sides
B is not used for mounting the Fresnel lens 109. As shown in FIGS. 11 to 13, a Fresnel lens 1 is attached to the upper cylindrical body 101.
A lens support beam 117 is provided to support the lens support beam 117 and the upper cylindrical body 1.
A lens insertion hole 118 for inserting a Fresnel lens 109 is provided between the lens and the main body of the lens. Along the lens insertion hole 118, the upper cylindrical body 1
01 has a lens fixing hook 1 on which the protruding portion 116A of the Fresnel lens 109 is hooked.
19 are provided. However, lens insertion hole 1
A lens fixing hook 119 is cut at the end portion 118A of the lens 18.

Since the Fresnel lens 109 is made of polyethylene, when the Fresnel lens 109 is bent by hand and both sides thereof are inserted into the lens insertion hole 118, an elastic force is generated that tries to return the bending, and this elastic force causes the protrusion to 116 hangs firmly on the lens fixing hook 119, the Fresnel lens 109 can be reliably attached to the upper cylindrical body 101 and will not come off easily.

In addition, since a large claw or the like is not provided on the side of the Fresnel lens 109, the Fresnel lens 109
When forming the lens 9, the polyethylene flows well into the mold for forming it, so that a well-proportioned Fresnel lens 109 with very little distortion can be formed.

Next, using FIG. 18 and FIG. 19, it will be explained that the direction of the detection area of the detection and notification device 1 of this embodiment can be adjusted.

FIG. 18 is a diagram for explaining that the direction of the detection area can be changed by rotating the cylindrical body 100 of the detection and notification device 1 around the rotation axis, and FIG. 19 is a diagram showing the lower side of the detection and notification device 1. Cylindrical body 10
2 is a diagram for explaining that the detection area can be moved in the direction of the rotation axis of the cylindrical body 100 by changing the position of the circuit device 150 in FIG.

In FIG. 18, 2 is a detection area, and one detection area 2 corresponds to one lens among the six lenses 109A to 109F that constitute the Fresnel lens 109. By turning the cylindrical body 100 before attaching the cover 200, the 18th
As shown in the figure, the direction of the detection area 2 can be changed by 180 degrees. After adjusting the orientation, cover 20
0, the rotation of the cylindrical body 100 is locked.

Further, the circuit device 150 inside the lower cylindrical body 102
By moving the detection area 2, the detection area 2 can be moved in the direction of the rotation axis of the cylindrical body 100, as shown in FIG. By shifting the groove of the area adjustment protrusion receiving portion 115 (Fig. 8) into which the detection area adjustment protrusion 157 (Fig. 7) fits by one position, each detection area 2 can be moved 20 cm from 5 m ahead.

Note that, for example, the detection and alarm device 1
In order to prevent malfunctions, for example, if it is desired to make the edge detection area an insensitive area, a blinding sheet 120 made of polyester is provided under the Fresnel lens 109, as shown in FIG. Both ends of the blindfold sheet 120 are inserted into the lens insertion hole 118 and engaged with the inside of the upper cylindrical body 101.

FIG. 14 is a plan view of the upper cylindrical body 101 equipped with the blindfold sheet 120. Note that the Fresnel lens 109 is not shown.

As can be seen from the above description, the detection and notification device 1 of this embodiment can provide the following effects.

(1) A gear 105 coaxial with the cylindrical body 100 is provided at the end of the cylindrical body 100, and the cylindrical body 100
Cylindrical body side support members 301 to 30 that support the side surfaces of the cylindrical body 100 on the pedestal 300 on which the cylindrical body 100 is mounted.
4, and a gear 10 at the end of the cylindrical body 100.
The pedestal 300 is provided with cylindrical body end support members 305 and 306 corresponding to the position No. 5, and a circular shallow stepped portion 106 is provided on the end surface of the cylindrical body 100 and is concentric with the end surface. Since claws 307 that engage with the step 106A of the portion 106 are provided on the cylindrical body end support members 305 and 306, the far infrared ray emitter detection and notification device 1 is small and can freely adjust the direction of the detection area. can be obtained.

(2) Since the cylindrical body 100 is prevented from rotating when the cover 200 is attached to the base 300, the cylindrical body 100 does not rotate after the detection and alarm device 1 is attached to a wall, ceiling, etc. Since the area does not move and the detection area set at the time of installation is maintained, the reliability of the detection and notification device 1 can be improved.

(3) The printed circuit board 155 is fixed and held by a battery box 153 made of plastic stick, and the battery box 153 is provided with an area adjustment protrusion 157, and the lower cylindrical body 102 is provided with an area adjustment protrusion receiver that engages with the area adjustment protrusion 157. Part 115
By providing these area adjustment protrusions 1
57 and the area adjustment protrusion receiving portion 115 can be formed with high precision. Furthermore, since the area adjustment protrusion 157 and the area adjustment protrusion receiving part 115 are made of plastic stick that is harder than the printed circuit board 155, the peaks of the area adjustment protrusion 157 and the area adjustment protrusion receiving part 115 may chip when the circuit device 150 is moved. Never. From these facts, the sensor 151 inside the cylindrical body 100
Since the position of the detection and notification device 1 can be determined with high precision, the reliability of the detection and notification device 1 can be improved.

(4) Protrusion 116 around Fresnel lens 109
is provided, and the protrusion 116 is provided on the lower cylindrical body 102.
A lens fixing hook 119 that engages with the lower cylindrical body 102 is provided to attach the Fresnel lens 109 to the lower cylindrical body 102.
By attaching the lens to the frame, the Fresnel lens 109 becomes a square with no large claws on the sides, so when forming the Fresnel lens, the polyethylene flows well into the mold for forming it, which prevents distortion. A Fresnel lens 109 with very little symmetry can be obtained.

Although the present invention has been specifically explained above based on examples, it goes without saying that the present invention is not limited to the above-mentioned examples, and can be modified in various ways without departing from the gist thereof. .

For example, as shown in FIG. 12A, a cylindrical body 100
In order to discharge water droplets that have entered the interior, water droplet guiding protrusions 130A and 13 are provided on the inner surface of the upper cylindrical body 101.
0B may also be provided.

FIG. 12A shows water droplet guiding protrusions 130A, 1.
It is a top view when the upper side cylindrical body 101 provided with 30B is seen from below.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a far-infrared ray emitter detection and notification device according to an embodiment of the present invention, and FIG. 2 is a perspective view of the far-infrared radiator detection and notification device shown in FIG. 1 with the cover removed. , FIG. 3 is a perspective view of the pedestal of the far-infrared emitter detection and notification device shown in FIG. 1, and FIG. 4 is a perspective view of the rotary lock of the far-infrared radiation detection and notification device shown in FIG. Fig. 5 is a perspective view of the cylindrical body of the far-infrared emitter detection and alarm device shown in Fig. 1, and Fig. 6 is a view of the circuit device inside the cylindrical body shown in Fig. 5 taken out. The perspective view at the time, Figure 7, is
FIG. 6 is an enlarged perspective view of the area adjustment projection and guide projection of the circuit device shown in FIG. 6, and FIG. 8 is an enlarged perspective view of the circuit device support portion of the lower cylindrical body shown in FIG. FIG. 9 is a perspective view of the circuit device shown in FIG. 6 viewed from below, and FIG.
FIG. 1 is an enlarged perspective view of the Fresnel lens of the far-infrared radiator shown in FIG. 1, and FIG. 11 is a perspective view of the upper cylindrical body of the far-infrared radiator shown in FIG. 1 when viewed from above with the Fresnel lens removed. , FIG. 12 is a plan view of the upper cylindrical body shown in FIG. 11 when viewed from below;
FIG. 12A is a plan view of the upper cylindrical body provided with the water droplet discharge protrusion as seen from below; FIG. 13 is a sectional view taken along the - cutting line of the upper cylindrical body shown in FIG. 12; FIG. 14 shows the upper cylindrical body 1 in FIG. 11.
01 with the blindfold sheet 120 attached, FIGS. 15 and 16 show the state of the rotation lock under the cylindrical body when the far-infrared radiator cover of FIG. 1 is not attached to the pedestal. FIG. 17 is a diagram for explaining the state of the rotation lock under the cylindrical body when the cover of the far-infrared radiator shown in FIG. 1 is installed on the pedestal, and FIG. A diagram for explaining that the direction of the detection area can be changed by rotating the cylindrical body of the detection alarm device shown in FIG. 1 around the rotation axis, and FIG. FIG. 6 is a diagram for explaining that by changing the position of the circuit device in the lower cylindrical body of the device, the detection area can be moved in the direction of the rotation axis of the cylindrical body. In the figure, 1...detection alarm device, 100...cylindrical body, 103, 104...shallow groove, 105...gear, 106...step portion, 106A...step, 20
0... Cover, 203... Fitting hole, 300... Pedestal, 301-304... Side support member, 305,
306... End support member, 307... Claw, 308
...protrusion, 309 ... protrusion, 312 ... hook hole, 313 ... small projection, 314 ... hook, 31
5...meshing protrusion, 317... protrusion.

Claims (1)

[Scope of utility model registration request] A sensor circuit device that detects far-infrared rays emitted from people, cars, etc., and a transmitter that notifies far-infrared detection by the output of the sensor circuit device are housed at the end of the cylindrical body, concentrically with the cylindrical body. A pedestal on which the cylindrical body is mounted is provided with a cylindrical body side support member for supporting a side surface of the cylindrical body, and the pedestal is provided with a gear on the shaft, and a cylindrical body side support member for supporting a side surface of the cylindrical body is provided on the pedestal on which the cylindrical body is mounted. A cylindrical body end face supporting member is provided at the cylindrical body end face support member, a circular shallow stepped portion having an axis concentric with the end face is provided on the end face of the cylindrical body, and a claw that engages with the step of the stepped portion is provided as the cylindrical body end face supporting member. A far-infrared ray emitter detection alarm characterized in that a protrusion provided on a member and meshing with a gear portion on the end face is provided on the bottom of the pedestal via an elastic body to rotatably support the cylindrical body. Device.