JPH03115802A - Infrared human body sensor - Google Patents

Abstract

PURPOSE:To freely specify a sensing region by a method wherein a sensor body is freely rotatable on a plane approximately parallel to a fixing face with respect to a body and a rotating axis protruding from a side of a mirror block is pivoted so that a rotation center of the body and the rotating axis are perpendicular to each other while the rotating axis is freely rotatable with respect to a housing of the mirror block body. CONSTITUTION:A sensor 2 is coupled to a body 3 fixed on a ceiling-like fixing face via a base 4. That is, a protruding rib 5 is made protrude on a required part on an inner periphery of a lower opening of the body 3 while a flange 6 having a cut 7 corresponding to the protruding rib 5 is made protrude on an outer periphery of the sensor 2. The cut 7 is thus aligned with the protruding rib 5 and the sensor 2 is fitted into the lower opening of the body 3 while the flange 6 is positioned above the protruding rib 5. A fixing spring 8 is a C-shaped anti-escape spring in elastic contact with the inner periphery of the lower opening of the body 3 whereby the sensor 2 is freely rotatable with respect to the body 3. Thus adjustment of a sensing region is possible with a simple structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an infrared human body detection device that detects a human body by concentrating infrared rays emitted from a human body using a mirror block.

[Background Art] Conventionally, this type of infrared human body detection device detects infrared beams b, -b, from a plurality of detection areas, as shown in FIG.

A device main body 2 consisting of a mirror block 1 configured to collect light and a detection circuit block (not shown) that detects infrared light collected by the mirror block 1 and outputs a human body detection signal is mounted on a base 4. It was designed to be attached within an opening of a body 3 that is fixed to a mounting surface such as a ceiling. As shown in FIG. 2, the mirror block 1 is formed by joining a plurality of divided mirrors M, ~M+o, which are divided concave mirrors, so that their focal points coincide, and the infrared beams b1~boo from a plurality of detection areas are is condensed onto an infrared sensor S placed at the focal point by each of the split mirrors M1 to MIO.

By the way, in such a conventional example, the beams b1 to b from the detection area. When changing from Fig. 3(a) to Fig. 3(b), loosen the mounting screw 4a of the base 4, rotate the base 4 in the direction of the arrow, tighten the mounting screw 4a, and then remove the main body of the device. It is necessary to perform the troublesome work of fixing the body 3 with the sensor 2 attached to the base 4, and the work of adjusting the detection area according to the situation at the site is troublesome.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to facilitate the adjustment work of the detection area,
Moreover, it is an object of the present invention to provide an infrared human body detection device with a simple structure.

[Disclosure of the Invention] (Embodiment 1) FIGS. 4 to 9 show embodiments of the present invention, in which bearings 12a and 12b that pivotally support the rotating shaft 11 protruding from the side surface of the mirror block 1 are shown. It is provided in the housing 13 of the device main body 2, and the mirror block 1 is rotatably attached to the housing 13 of the device main body 2, and the mirror block 1 is rotated as shown in FIG. This is so that it can be done easily. 15 is one bearing part 12
The bearing fitting 15 is provided with a holding piece 15a that presses the rotating shaft 11 and an elastic contact piece 15b that makes elastic contact with the side surface of the mirror block 1. Click uneven portions 16 are formed on the elastic contact surfaces of the pieces 15b, and the mirror block 1
This is so that you can feel a click when rotating. The bearing fitting 15 is attached by press-fitting both side pieces 15c into fitting grooves 18 formed in the side walls of the recess 17 of the housing 13, and is prevented from coming out by retaining claws 18a. The rotary shaft 11 is supported by pressing the rotary shaft 11 against the bottom surface of the recess 17 by the piece 15a. The other bearing part 12b is formed of an L-shaped bearing fitting 20 with a shaft hole 19 bored therein, and is attached by press-fitting into the fitting hole 21 of the housing 13.
The click feeling obtained by the engagement between the protrusion 22 formed by the 0-wrinkle process and the protrusion 23 provided on the side surface of the mirror block 1 makes the rotation feel more reliable. ing.

The device main body 2 is coupled via a base 4 to a body 3 that is fixed to a mounting surface such as a ceiling. That is, as shown in FIGS. 10 and 11, a protruding rib 5 is provided protruding from a main part of the inner peripheral surface of the lower opening of the body 3, and a flange 6 is provided protruding from the outer periphery of the device main body 2. A notch 7 corresponding to the protruding rib 5 is formed in the flange 6. By aligning this notch 7 with the protruding rib 5, the flange 6 is aligned with the protruding rib 5.
The device main body 2 is fitted into the lower opening of the body 3 so as to be positioned above. Reference numeral 8 denotes a C-shaped retaining spring that comes into elastic contact with the inner peripheral surface of the lower opening of the body 3, and is interposed between the projecting rib 5 and the flange 6 to rotate the device main body 2 to the body 3. It can be attached freely. That is, when the device main body 2 rotates with respect to the body 3, even if the projecting rib 5 aligns with the notch 7, the projecting rib 5 is retained by the retaining spring 8, so that the body 3 of the device main body 2 This prevents it from falling off. Note that the retaining spring 8 is mounted so as to be compressed, and is brought into elastic contact with the inner circumferential surface of the body 3 by a return force (arrow).

Since the main body 2 of the device is rotatably attached to the body 3, the detection area can be easily changed, and the task of adjusting the detection area according to the site situation is simplified.
Moreover, since the rotation center of the device main body 2 and the rotation axis 11 of the mirror block 1 are perpendicular to each other, there is an effect that the degree of freedom in adjusting the orientation of the detection area after installation is increased. A rotating mechanism is formed by a protruding lip 5 provided on the body 3, a 7 flange 6 provided on the device main body 2, and a retaining spring 3, and it is said that a means for adjusting the detection area can be realized with a simple configuration. It has an effect.

(Embodiment 2) Figures 12 to 14 show Embodiment 2, in which the bearing fitting 20 is fitted into the fitting 124 of the housing 13 from the egg direction, and the bearing fitting 20' is protruded. The engagement of the provided protrusion 25 with a protrusion 26 protruding from the inner surface of the fitting groove 24 prevents the bearing fitting 2 from being pulled out in the lateral direction.
0 notch 27 engages with the stopper wall 28 to prevent upward removal.

(Embodiment 3) This embodiment is another embodiment regarding the connecting portion between the device main body 2 and the body 3, and as shown in FIGS. 15 and 16, the inner periphery of the lower opening of the body 3 is In addition to providing stopper protrusions 9a at important points on the surface, the flange 6 of the device main body 2
Stopper protrusions 9b are provided at important points, and both stopper protrusions 9a
, 9b, rotation of the device main body 2 is restricted. In addition, in this embodiment, the stopper protrusion 9
Although one pair of a and 9b are provided to restrict rotation in one direction, two pairs may be provided to restrict rotation in two directions (restriction of rotation range).

(Embodiment 4) FIGS. 17 and 18 show Embodiment 4, in which a plurality of click recesses 10a are provided at intervals in the flange 6, and the four click parts 10a can be freely engaged at key points of the retaining spring 8. It is provided with a convex portion 10b, and the device main body 2
Now you can get an evil click when rotating. In this case, since the locking spring 8 is used to form the click means, the configuration can be simplified.

<Example 5> FIG. 19 shows Example 5. In Example 1,
A positioning protrusion rib 5a for determining the insertion position of the device main body 2 into the body 3 is provided protrudingly on the inner peripheral surface of the lower opening of the body 3, and the flange 6 of the device main body 2 corresponds to the protrusion rib 5a. A notch 7a is provided to limit the insertion position.

[Effects of the Invention] The present invention is configured as described above, in which the main body of the device is rotatably attached to the body in a plane substantially parallel to the mounting surface, and the rotating shaft protrudes from the side surface of the mirror block. The mirror block is rotatably attached to the housing of the equipment body by providing a bearing part in the housing of the equipment body to support the shaft so that the center of rotation of the equipment body and the rotation axis are approximately perpendicular to each other. The detection area can be adjusted by rotating the device body and the mirror block, and the detection area can be freely set after installation.

[Brief explanation of drawings]

Fig. 1(a) is an exploded perspective view of the conventional example, Fig. 1(b) is a bottom view of the main parts of the same, Fig. 2 is an exploded perspective view of the main parts of the same, and Fig. 3
4 is an exploded perspective view showing the first embodiment of the present invention; FIG. 5 is a front view of the main parts of the same; FIGS. 6 to 8 are perspective views of the main parts of the same; Fig. 9 is a front view of the main parts of the same as above, Figs. 10 (a) to (c) are bottom views of main parts showing the body, device main body, and retaining spring used in the above, respectively, and Fig. 11 is a cross section of the main parts of the same as above. FIG. 12 is a front view of the main part showing Embodiment 2 of the present invention, FIG. 13 is an exploded perspective view of the main part of the same, and FIG.
4 is a sectional view of the same essential parts as above, FIGS. 15(a) and 15(b) are bottom views of essential parts showing Embodiment 3 of the present invention, and FIGS.
) are sectional views of the same essential parts as above, and FIGS. 17(a) and 17(b) are implementations of the present invention f! q4, FIG. 18 is a side view of the same essential parts, and FIGS. 19(a) and (b) are Embodiment 5 of the present invention.
FIG. 1 is a mirror block, 2 is a device main body, 3 is a body, 4 is a base, 11 is a rotating shaft, 12a, 12b are bearing parts, 15
1 is a bearing fitting, 15b is an elastic contact piece, and 16 is a click uneven portion.

Claims (2)

[Claims] (1) It has a device body equipped with a mirror block that focuses infrared beams from multiple directions and a detection circuit block that detects the infrared light focused by the mirror block and outputs a human body detection signal, and has a base. The device body is fixed to a mounting surface such as a ceiling through an opening formed on the side opposite to the mounting surface of the body, so that the main body of the device can be rotated in a plane approximately parallel to the mounting surface. In the infrared human body detection device formed by fitting, a bearing part is provided in the device main body housing to support a rotating shaft protruding from the side surface of the mirror block so that the center of rotation of the device main body and the rotating shaft are substantially orthogonal, An infrared human body detection device characterized by a mirror block rotatably attached to a housing of the device body. (2) A resilient contact piece that makes elastic contact with the side surface of the mirror block is provided on the bearing fitting that forms the bearing part, and an uneven part for clicking is formed on the side surface of the mirror block and the elastic contact surface of the elastic contact piece, so that it clicks when the mirror block rotates. An infrared human body detection device according to claim 1, which is configured to provide a sense of sensation.