JPH0636036B2 - Infrared human body detector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an infrared human body detection device for detecting human body by condensing infrared rays emitted from a human body by a mirror block.

BACKGROUND ART Conventionally, as shown in FIG. 1, an infrared human body detecting device of this type has a mirror block 1 configured to collect infrared beams b _{1 to} b ₁₀ from a plurality of detection regions, and a mirror block. An apparatus main body 2 including a detection circuit block (not shown) that detects the infrared rays condensed by 1 and outputs a human body detection signal is fixed to a mounting surface such as a ceiling via a base 4. It was supposed to be installed in the opening of the body 3. As shown in FIG. 2, the mirror block 1 is formed by joining a plurality of split mirrors M _{1 to} M ₁₀ obtained by splitting a concave mirror so that their focal points coincide with each other, and an infrared beam b ₁ from a plurality of detection areas is formed. the ~b ₁₀ by the divided mirror M ₁ ~M ₁₀ is adapted to condense the infrared sensor S is disposed at the focal.

By the way, in such a conventional example, when changing the beams b _{1 to} b ₁₀ from the detection area as shown in FIG. 3 (a) to FIG. 3 (b), the mounting screw 4a of the base 4 is loosened. 4 is rotated in the direction of the arrow and the mounting screw 4a is tightened, and then the troublesome work of fixing the body 3 to which the device body 2 is attached to the base 4 is required. There was a drawback that the adjustment work was troublesome.

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to easily adjust the detection area,
Moreover, it is to provide an infrared human body detection device having a simple structure.

DISCLOSURE OF THE INVENTION (Embodiment 1) FIGS. 4 to 9 show an embodiment of the present invention, in which bearing portions 12a and 12b for axially supporting a rotary shaft 11 projecting from a side surface of a mirror block 1 are provided. The mirror block 1 is provided in the housing 13 of the apparatus main body 2 and is rotatably attached to the housing 13 of the apparatus main body 2. The mirror block 1 is rotated as shown in FIG. It can be done easily. 15 is one bearing portion 12
The bearing fitting 15 is provided with a pressing piece 15a for pressing the rotating shaft 11 and an elastic contact piece 15b for elastically contacting the side surface of the mirror block 1. The click concavo-convex portion 16 is formed on the elastic contact surface of the piece 15b.
A click feeling is obtained when the is rotated. The bearing fitting 15 is attached by press-fitting both side pieces 15c into a fitting groove 18 formed in the side wall of the recess 17 of the housing 13, and is prevented from coming off by a retaining claw 18a.
The rotating shaft 11 is supported by the pressing piece 15a so as to press the rotating shaft 11 against the bottom surface of the recess 17. The other bearing portion 12b is formed by an L-shaped bearing fitting 20 having a shaft hole 19 formed therein, and is press-fitted into a fitting hole 21 of the housing 13 to be attached thereto.
With the click feeling obtained by the engagement between the protrusion 22 formed by the grain reduction processing 0 and the protrusion 23 provided on the side surface of the mirror block 1, the rotation feeling can be made more reliable. ing.

The device body 2 is coupled via a base 4 to a body 3 fixed to a mounting surface such as a ceiling. That is, as shown in FIG. 10 and FIG. 11, a protruding rib 5 is formed in the main portion of the inner peripheral surface of the lower opening of the body 3, and a flange 6 is formed in the outer periphery of the apparatus body 2. Therefore, the flange 6 has a notch 7 corresponding to the protruding rib 5. The notch 7 is aligned with the projecting rib 5 so that the flange 6 has the projecting rib 5.
The main body 2 of the apparatus is fitted into the lower opening of the body 3 so as to be located above. Reference numeral 8 is a C-shaped retaining spring that is elastically contacted 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 provide the main body 2 of the apparatus.
Is rotatably attached to the body 3. That is, when the device body 2 rotates with respect to the body 3,
Even if the protruding rib 5 is aligned with the notch 7, the protruding rib 5 does not come out of the spring 8.
The device main body 2 is prevented from falling off from the body 3 by being locked with the. The retaining spring 8 is mounted so as to be compressed and is elastically contacted with the inner peripheral surface of the body 3 by the restoring force (arrow).

Since the device body 2 is rotatably attached to the body 3, the detection area can be easily changed, and the work of adjusting the detection area according to the situation at the site becomes easy.
Moreover, since the rotation center of the device body 2 and the rotation axis 11 of the mirror block 1 are orthogonal to each other, the degree of freedom in adjusting the orientation of the detection region after installation is increased, and The rotating mechanism is formed by the projecting rib 5 provided on the body 3, the flange 6 provided on the apparatus main body 2, and the retaining spring 8, and the effect that the detection area adjusting means can be realized with a simple configuration. have.

(Embodiment 2) FIGS. 12 to 14 show Embodiment 2 in which the bearing fitting 20 is laterally fitted into the fitting groove 24 of the housing 13 and is attached to the bearing fitting 20 '. The protruding projection 25 and the protrusion 26 protruding from the inner surface of the fitting groove 24 are engaged with each other to prevent the stopper from being pulled out in the lateral direction. It is locked in the direction.

(Embodiment 3) This embodiment is another embodiment relating to the connecting portion between the apparatus main body 2 and the body 3, and as shown in FIGS. 15 and 16, the inner circumference of the lower opening of the body 3 is A stopper projection 9a is provided at a key portion of the surface, and the flange 6 of the apparatus main body 2 is provided.
Stopper protrusions 9b are provided at
The rotation of the apparatus main body 2 is restricted by the engagement of a and 9b. In this embodiment, a pair of stopper protrusions 9a and 9b are provided to regulate rotation in one direction, but two pairs are provided to regulate rotation in two directions (regulation of rotation range). You may

(Embodiment 4) FIGS. 17 and 18 show Embodiment 4 in which a plurality of click recesses 10a are provided on the flange 6 and the click recesses 10a can be engaged with the key portions of the retaining spring 8. The click convex portion 10b is provided so that a click feeling can be obtained when the apparatus main body 2 is rotated.
In this case, since the click means is formed by using the retaining spring 8, the structure can be simplified.

(Fifth Embodiment) FIG. 19 shows a fifth embodiment.
Positioning protruding ribs 5a for determining the insertion position of the device body 2 into the body 3 are provided on the inner peripheral surface of the lower opening of the body 3 and the flange 6 of the device body 2 corresponds to the protruding ribs 5a. A notch 7a is provided to limit the insertion position.

[Effects of the Invention] The present invention provides a protruding rib at a portion of the inner peripheral surface of the opening formed in the body as described above, and a flange having a notch corresponding to the protruding rib on the outer periphery of the apparatus body. A C-shape that is protruded, fits the device body into the body so that the notch is aligned with the protruding rib, and the flange is located deeper in the body than the protruding rib, and elastically contacts the inner peripheral surface of the opening of the body. The retaining spring is interposed between the protruding rib and the flange so as to extend over the notch, so that the main body of the apparatus is rotatably attached to the body in a plane substantially parallel to the attachment surface, and A bearing portion is provided in the housing of the device body so as to support the rotating shaft protruding on the side surface of the mirror block so that the rotation center of the device body and the rotating shaft are substantially orthogonal to each other, and the mirror block is provided in the housing of the device body. Since it is attached so that it can rotate freely, It is possible to adjust the detection area by the rotation of the over blocks has the effect that the setting of the detection area can be freely after installation.

Further, the main body of the apparatus is rotatably mounted with the above-described configuration in the opening formed on the side opposite to the mounting surface of the body fixed to the mounting surface such as the ceiling via the base. Therefore, the structure for holding the main body of the device by the body also serves as the structure for allowing the main body of the device to freely rotate with respect to the body, and is substantially parallel to the mounting surface regardless of the mounting direction of the body. While the orientation of the detection area in the plane can be adjusted, there is an advantage that the entire configuration can be simplified and the amount of protrusion of the apparatus main body from the mounting surface can be reduced.

[Brief description of drawings]

FIG. 1 (a) is an exploded perspective view of a conventional example, FIG. 1 (b) is a bottom view of relevant parts of the same, FIG. 2 is an exploded perspective view of essential parts of the same, FIG. FIG. 4 is an exploded perspective view showing Embodiment 1 of the present invention, FIG. 5 is a front view of relevant parts of the same, FIGS. 6 to 8 are perspective views of essential parts of the same, and FIG. 9 is essential parts of the same. Front view, first
FIGS. 0 (a) to (c) are bottom views of the main parts showing the body, the device body, and the retaining spring used in the same, FIG. 11 is a cross-sectional view of the same main parts, and FIG. 12 is the second embodiment of the present invention. FIG. 13 is an exploded perspective view of an essential part of the same, FIG. 14 is a sectional view of an essential part of the same, and FIGS. 15 (a) and 15 (b) are essential parts showing a third embodiment of the present invention. Bottom view, FIGS. 16 (a) and (b) are cross-sectional views of relevant parts of the same, FIGS. 17 (a) and (b) are bottom views of essential parts showing Embodiment 4 of the present invention, and FIG. Part side views and FIGS. 19 (a) and (b) are bottom views of essential parts showing Embodiment 5 of the present invention. 1 is a mirror block, 2 is an apparatus main body, 3 is a body, 4 is a base, 5 is a protruding rib, 6 is a flange, 7 is a notch, 8 is a retaining spring, 11 is a rotating shaft, 12a and 12b are bearing portions, 1
5 is a bearing fitting, 15a is a holding piece, 15b is an elastic contact piece, 1
Reference numeral 6 is an uneven portion for click.

Claims (2)

[Claims] 1. A device main body comprising: a mirror block for collecting infrared beams from a plurality of directions; and a detection circuit block for detecting infrared rays collected by the mirror block and outputting a human body detection signal. In an infrared human body detection device comprising an apparatus main body fitted in an opening formed on a surface opposite to a mounting surface of a body fixed to a mounting surface such as a ceiling via a base, A protruding rib is provided at a point on the inner peripheral surface of the opening, and a flange having a notch corresponding to the protruding rib is provided on the outer periphery of the main body of the device. Also, the main body of the apparatus is fitted to the body so that it is located in the back of the body, and a C-shaped retaining spring that elastically contacts the inner peripheral surface of the opening of the body is straddled over the notch between the protruding rib and the flange. The main body of the device is mounted above the mounting surface A bearing that is attached to a body so as to be rotatable in a plane that is substantially parallel, and that pivotally supports a rotating shaft that projects from the side surface of the mirror block so that the center of rotation of the device body and the rotating shaft are substantially orthogonal to each other. An infrared human body detection device, characterized in that a portion is provided in a housing of the device body, and a mirror block is rotatably attached to the housing of the device body. 2. A bearing block forming a bearing portion is provided with a pressing piece that elastically contacts the peripheral surface of the rotating shaft of the mirror block to press the rotating shaft, and an elastic contacting piece that elastically contacts the side surface of the mirror block. The infrared human body detection device according to claim 1, wherein a concave and convex portion for click is formed on the side surface and the elastic contact surface of the elastic contact piece so that a click feeling can be obtained when the mirror block is rotated.