JPH0217349Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the structure of a heat ray sensor that detects heat rays generated from an object to be detected such as a human body.

[Background technology]

Conventionally, this type of heat ray sensor had a structure in which the device itself was attached, so depending on the location of the hole for attaching the device, the mounting position and structure of the built-in printed circuit board were restricted, resulting in waste. There were many. There were many problems, especially in the case of small-sized ones, and some of them were impossible to provide holes for mounting due to their structure.

[Purpose of invention]

This invention was devised in view of the above-mentioned problems, and its purpose is to facilitate installation and construction, and also to allow for miniaturization and simplification as the structure of the device is not restricted by mounting holes. The aim is to provide the structure of a hot-wire sensor.

[Disclosure of invention]

The present invention will be explained below with reference to embodiment figures. 1 in the figure is a body made of a synthetic resin molded product, and this body 1 is integrally provided with a standing wall 2 at the rear of the top surface in FIG. A mirror block 3 incorporating elements and the like is provided, and a terminal block 4 is provided on the left side. The vertical wall 2 is provided with a concave plane on the front surface, and the printed circuit board 5 is housed from the back side of this concave plane.
FIG. 2 shows the back surface of the body 1, and the upper surface portion of the body 1 corresponding to a portion of the lower surface of the mirror block 3 and a portion of the lower surface of the terminal block 4 is open as shown, and the vertical wall 2 The portion corresponding to the concave plane is also open as shown. Ribs 7 with opposing grooves 6 are provided on both sides of the inside of the back surface of the mirror block 3 facing this opening. The printed circuit board 5 is attached without screws by press-fitting the printed circuit board 5. 8
is a base made of a synthetic resin molded product, and this base 8 has insertion holes 1 for inserting wood screws 9, 9 for fixing to construction materials, as shown in Fig. 3a and b.
0, 10, the letters "UP" indicating the mounting direction, and an arrow 11 are engraved. In addition, a wire insertion hole 13 is provided on one side for introducing a wiring wire 12 from the construction material side, and a thin knock-out portion 14 for exposed wiring is provided on the side peripheral wall of the base 8 on the back side. . Therefore, the base 8 of the lever is adjusted in advance so that the base 8 is parallel to the structure while temporarily fixing the structure with wooden screws 9, 9, and the wooden screws 9 are tightened to fix the structure. In the figure, 15 is a back plate made of a synthetic resin molded product, and this back plate 15 is the body 1.
body 1 by engaging the engaging claw 16 with the inner peripheral edge of the rear recess of body 1.
mounted on. 17 is the wire insertion hole 1 of the base 8
3, the wiring wire 12 is led out from the back surface of the body 1 to the front surface of the body 1, that is, the upper surface side in FIG. 1, through the notch 17. Figures 4a and 4b show the construction method for attaching the body 1 after attaching the back plate 15 to the base 8 attached to construction materials as described above. With the pair of claws (not shown) hooked into the hook holes 18 of the base 8, rotate the body 1 in the direction of the arrow 19 as shown in FIG. The body 1 is then placed on the base 8, and the peripheral edge of the body 1 is fitted into the peripheral rib 20 of the base 8. At this time, the wiring wire 12 is led out through the wire through hole 21 opened on the surface of the body 1. Now body 1
Once it is confirmed that the base 8 is accurately fitted into the peripheral rib 20 of the base 8, insert the base fixing screw that has been previously screwed into the body 1 into the screw hole 22 drilled in the base 8. 23 are screwed together and tightened to fix the body 1 to the base 8.

By the way, the terminal block 4 is arranged in a stepped manner,
A terminal section 4a for contact output of a relay drive circuit section for contact output, which will be described later, is provided on the upper stage, and a power supply terminal section 4b is provided on the lower stage.
While ensuring the insulation distance between a and 4b in a small space, wiring can be performed sequentially from the lower stage to the upper stage, and terminal wiring can be effectively performed even in a narrow space. Figures 5a, b, and c are diagrams showing the construction method for terminal connection. First, when connecting, as shown in Figure 5a, the upper surface of the power terminal section 4b is covered with insulation. The terminal cover 24 is removed by loosening the screws 25 of the cover 24, and then the power supply wire 12a in the wiring wire 12 is fastened and connected to the terminal fitting of the power supply terminal portion 14b as shown in FIG. 5B. After completing this connection, the above-mentioned terminal cover 24 is returned to its original position and attached with the screws 25, and after this attachment, the electric wire 12b for contact output is tightened and connected to a predetermined terminal fitting of the terminal portion 4a for contact output. Fifth
Figure c shows the state when this connection is completed.

As mentioned above, the terminal block 4 serves not only as a terminal but also as a bearing for rotatably supporting the mirror block 3. As shown in FIG. A recess 27 for rotatably supporting the protruding rotating shaft 26a is provided at the back of the terminal block 4. The recess 27 is marked with Fig. 7a.
A holding metal fitting 28 as shown in FIG.
Further, the central tongue piece 30 presses the mirror block 3 laterally. Figure 7b shows the presser fitting 28.
The both side edges of the presser metal fitting 28 are press-fitted into the grooves 31 cut into the inner surfaces of both sides of the recess 27. In the figure, 32 is a click-generating projection protruding from the front surface of the tongue piece 30, and 33 is a retaining claw. The mirror block 3 is connected to the rotating shaft 2.
A rotating shaft 26b is also provided protruding from the side opposite to the rotating shaft 6a, and the rotating shaft 26b is inserted into the bearing hole 3 of the fixing fitting 34.
5, and is supported by the body 1 so as to be freely rotatable in the vertical direction together with the rotating shaft 26a. As shown in FIGS. 8a and 8b, the fixing fitting 34 is supported by press-fitting its lower end into a sheath-like protrusion 36 protruding from the body 1, and its upper end is bent into an L-shape. A pair of textured protrusions 37 are provided on the inner surface of the tip, and these protrusions 37 are in a relationship that allows the protrusions to ride over the ribs 38 protruding from the side surface of the mirror block 3, so that when the mirror block 3 rotates, you can feel the rotation. You can get it.

The mirror block 3, which is rotatably supported as described above, is rotated in the direction of the arrow 41 as shown in FIG. The direction of the detection area can be set by appropriately rotating it.

Here, the schematic structure of the mirror block 3 will be explained based on FIG. 10. 42 ₁ and 42 ₂ are concave mirrors whose reflecting surfaces are paraboloids of revolution obtained by rotating a parabola around the vertical axis. The split mirrors 42 ₁ , 42 ₂ . . . are joined together so that their focal points coincide to form the composite concave mirror 43. 44 ₁ , 44 ₂ ... are reflecting mirrors made of plane mirrors disposed between the focal point and the center of the joint of the compound concave mirror 43, and each reflecting mirror 44 ₁ , 44 ₂ ... is each divided mirror 42 ₁ , 42 ₂ ... and are rotatably attached to the mounting frame 45.
5 is bridged to the body of the mirror block 3.
The incident light from each detection area that is collected by the composite concave mirror 43 is reflected by each reflecting mirror 44 ₁ , 44 ₂ . It becomes incident on . Each of the reflecting mirrors 44 ₁ , _{44 2} .
7 ₂ ... can be rotated from a predetermined position, and by this rotation, the incident light collected by the split mirrors 42 ₁ , 42 ₂ ... is detected by a heat ray detection element, which is an infrared sensor. 46, and the detection operation of the detection area corresponding to the incident light is turned off. In the example, the detection area can be set in 5 divisions in 2 rows, for a total of 10 divisions.
As shown in Figure 1, the detection area is set in a cross shape. Figures 12a and 12b show the detection area settings when this embodiment is installed without any problem. The detection area is shown when the sensor is moved, and in the embodiment, the variable range is 0° to 12°. The difference between the rearmost detection area and the frontmost detection area is 18°.
The spread of each detection area is 3 degrees, and the pitch of each detection area is 10 degrees. In the figure, A indicates the door side, and B indicates the floor surface.

Now, as shown in FIG. 9, after rotating the mirror block 3 and setting the detection area, a cover 39 is attached to the body (1). cover 3
9 is made of a transparent material that transmits infrared rays,
In Fig. 1, it has a box shape with one side and the bottom open, and when it is attached, protrusions protruding from both ends of the standing wall 2 from the front of the body 1 are used as shown in Fig. 13a. 2a on the inner wall surface of the cover 39, the cover 39 is moved rearward, and the locking claw 47 provided at the lower end of the other side in FIG. to be fixed. After this fixing is completed, tighten the cover fixing screw 4 as shown in Fig. 13b.
9 is brought into engagement with the front edge of the standing wall 2. When the cover 39 is attached in this manner, the installation work for the heat ray sensor of the present invention is completed.

In addition, when connecting the above-mentioned wiring wire 12 to the terminal block 4, since the terminal block 4 is arranged facing left, for example, while fixing the wire 12 with the left hand, the terminal fitting can be tightened with a screwdriver with the right hand, making the construction easier. Easy to do.

By the way, in the above embodiment, the terminal parts 4a and 4b for low voltage and power supply voltage are provided by one terminal block 4, but as shown in FIG. 14, high voltage terminal blocks are provided on both sides of the mirror block 3. 4 ₁ and a low voltage terminal block 4 ₂ , it is possible to ensure insulation distance and at the same time avoid piping low and high voltage lines in the same line according to extension regulations. In this case, _the rotation bearing of the mirror block 3 is provided on both terminal blocks 4 ₁ , 4 ₂ .
The mirror block 3 is rotatably supported between 4 _{and 2} .

Next, the operation of the electric circuit of the heat ray sensor of the present invention will be schematically explained based on the circuit block shown in FIG. In the figure, reference numeral 50 denotes an optical system section consisting of a mirror box, through which the heat rays X from the human body 51 and the like are made to enter the heat ray detection element 46. 5
2 is an amplifier circuit, and this amplifier circuit 52 is for amplifying the hot ray detection signal converted into an electric signal by the hot ray detection element 46. Reference numeral 53 denotes a signal processing circuit. This signal processing circuit 53 is composed of, for example, a one-shot multi-chip circuit, and is designed to generate a one-shot pulse in response to the above-mentioned hot ray detection signal. 54 is an output time adjustment circuit, and this output time adjustment circuit 54 consists of a switching circuit consisting of a PUT etc. and a CR time constant circuit consisting of a capacitor etc. charged by the one shot pulse.
By changing the time constant, it is now possible to adjust the operating time of a switching circuit such as a PUT. 55 is an operation display circuit, and this operation display circuit 55 is a circuit for displaying that the switching circuit of the output time adjustment circuit 54 has operated. Reference numeral 56 denotes a contact output relay drive circuit. This contact output relay drive circuit 56 is a circuit that drives a relay such as a latching relay that operates when the switching circuit is turned on, and the contact output of the latching relay is a contact output. terminal part 4a
more externally. 57 is a power supply circuit.

However, in the heat ray sensor of the present invention, these circuits and the heat ray detection element 46 are attached and wired to the printed circuit board 5, and the printed circuit board 5 is connected to the optical system section 5 as described above.
It is attached to the mirror block 3 of 0.

Now, as shown in FIG. 16, a permanent magnet 58 is provided on the cover 39 so that when the cover 39 is attached as described above, the detection level, detection direction, and detection area set before attachment will not change. When the cover 39 is attached to the body 1, a reed switch 59 provided on the printed circuit board 5 on the body 1 side may be operated to switch the detection sensitivity of the circuit shown in FIG.

[Effect of idea]

As described above, in this invention, the base and the body are constructed separately, so the base can be installed in advance on a construction material such as a solid wood using the insertion hole for screw insertion, and as a result, the body side is heavy. In addition to being able to set the mounting position accurately in advance even in cases where the mounting position is Since there is no dead space in the side structure, the structural space of the body can be used effectively, and mirror blocks, printed circuit boards, and terminal blocks can be placed efficiently, making the overall size smaller. The advantage is that it is simple, and since a recess for rotatably supporting the rotating shaft protruding from one side of the mirror block is provided on the back of the terminal block, the terminal block can also serve as a bearing member for the rotating shaft of the mirror block. This allows for a smaller space, making the hot wire sensor even more compact, and since a stable structure such as a terminal block also serves as the bearing member, stable bearings can be achieved. There is.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a bottom view of the same body as above, FIGS. 3 a and b are top views and bottom views of the same base, FIGS. 4 a and b are explanatory views of how the body is attached to the above base, and FIGS. c is an explanatory diagram of connection to the same terminal block, No. 6
The figure is a front view of the same body as above, FIG. 7a is an enlarged perspective view of the presser fitting used in the same as above, FIG. Diagram b
is a perspective view of the main parts of the same as above, FIG. 9 is an explanatory diagram of the detection area setting of the same as the above mirror block, FIG. 10 is an enlarged exploded perspective view of the mirror block, and FIGS. Explanatory diagram, Figure 13a,
Fig. 14 is a perspective view of the cover of another embodiment of the present invention, Fig. 15 is a circuit block diagram of the heat ray sensor of the present invention, and Fig. 16 is an illustration of another embodiment of the present invention. It is a sectional view of the main parts of the example, 1 is the body, 2 is the vertical wall, 3 is the mirror block, 4 is the terminal block, 5 is the printed circuit board, 8 is the base, 15 is the back plate, 20 is the peripheral rib, 23 is the base stopper screw, 3
9 is a cover, 47 is a locking pawl, and 49 is a cover locking screw.

Claims (1)

[Claims for Utility Model Registration] (1) A base that is attached in advance to a construction material such as a blank, a body that is mounted and attached to the base, and a heat ray transmitting device that is slidably attached to the upper surface of the body. It consists of a terminal block for connecting the output and power source, a mirror block equipped with an optical system section for directing the heat rays from the object to be detected to enter the element, and a circuit section for processing the heat ray detection signal. A printed circuit board is disposed on the body, a recess is provided at the back of the terminal block to rotatably support a rotating shaft protruding from one side of the mirror block, and a recess is provided at the back of the terminal block for the insertion of a screw for attachment to construction materials. The structure of a heat ray sensor with an insertion hole. (2) The hot wire according to claim 1 of the utility model registration claim, in which the back of the terminal block is placed on the right side of the front, the terminal part is placed on the left side of the front, and mirror boxes are arranged side by side on the right side of the back of the terminal block. Structure of the sensor.