JPH0627865B2 - Object detector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an object detector for detecting an object with a heat ray or the like.

[Background Art] As an object detector, there is a heat ray detector that detects an object by detecting a heat ray emitted from the object. Since this heat ray type detector is a passive type without a light emitting part,
It is often used when three-dimensionally detecting an object in a wide detection area. However, such three-dimensional detection has a problem that the shape of the detector becomes large.
Therefore, downsizing has been attempted by using a Fresnel lens as an optical system. However, even when this Fresnel lens was used, there was a limit.

Therefore, in order to further reduce the size, a one-beam type heat ray detecting element has been developed. This heat ray detection element has a spot-like detection area and is often used for controlling lighting equipment. However, the heat ray type detector using this kind of heat ray detecting element has a problem in that the size of the heat ray detector is too small to have a variable mechanism for adjusting the attaching direction and the detecting direction, and the attaching place is limited.

Some of the three-dimensional warnings use a heat ray detecting element having a plurality of elements in order to improve noise resistance. However, in such a heat ray type detector, since there is directivity in the detection direction, there is a problem that the mounting place is often limited in order to satisfy the specifications. As described above, conventionally, there has been no object detector which is small and whose mounting location is not limited.

[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 detect an object in which the detection direction can be easily adjusted, the mounting place is not restricted, and the size can be reduced. To provide a container.

DISCLOSURE OF THE INVENTION (Structure) According to the present invention, a detector main body is rotatably mounted in a body in a vertically rotatable manner, and a lower cover is rotatably mounted in a circumferential direction on a lower surface of the body. By mounting the detector body so that the detector body can be rotated in the vertical direction and the body in the circumferential direction, the detection area can be set arbitrarily, and the mounting location of the object detector is not limited. By forming a rotating mechanism in the detector body, body, and lower cover, a special detection area changing device for changing the detection area is not required, and the object detector can be downsized. It was possible.

(Embodiment) FIGS. 1 to 12 show an embodiment of the present invention. In this embodiment, a heat ray detector will be described as an example. The hot-wire detector, and the heat ray sensing elements 7 ₁ eliminating the directivity of the detection direction by the element 8 Ryakue shaped as shown in FIG. 9 (a), in FIG. 9 (b) As shown, the heat ray detecting element 7 ₂ is used in which the directivity of the detecting direction is eliminated by using only _one detecting element 8 ₁ for detecting the heat ray. Incidentally, the element ₈₂ of the heat ray sensing element 7 ₂ is to prevent a malfunction due to sudden temperature changes. The heat ray detecting element 7 and an object detecting circuit for detecting an object from the output of the heat ray detecting element 7 are mounted on the printed board 6. The printed circuit board 6 is housed in the detector main body 1 having a substantially spherical shape and an opening window 9 formed in the upper part thereof. The heat ray detecting element 7 is mounted so that the detection surface faces the opening direction of the opening window 9, and the opening window 9 is fitted with a bottomed cylindrical Fresnel lens 5. On the outer surface of the detector main body 1, a shaft 10 serving as a rotation center of the detector main body 1 is provided so as to project.

The body 2 is formed in a spherical shape having a hollow upper portion and a cylindrical shape in a lower portion, and an opening 11 extending from right above to a side is formed in the spherical upper portion as shown in FIG. In the detector body 1, the Fresnel lens 5 is projected from the opening 11 to the outside of the body 2, and the shaft 10 is formed into the bearing 4 formed on the inner surface of the upper portion of the body 2.
It is attached by pivoting to 1. The end of the opening 11 has a function as a stopper that regulates the rotation angle of the detector body 1, and the rotation angle is determined by the vertical width of the opening 11. A pair of upper and lower ribs 12 project diagonally from the inner surface of the cylindrical lower part of the body 2, and the two wire springs 40 arranged between the ribs 12 support the detector main body 1 to support the detector. The rotation of the main body 1 is made smooth. On the inner periphery of the lower end of the body 2, a receiving portion 13 for attaching the lower cover 3 attached to the open lower surface of the body 2 is provided. As shown in FIG. 6, the receiving portion 13 has an L-shaped cross section, and the upper surface 13a is an inclined surface that inclines toward the inside. A plurality of grooves 14 are formed in the hanging piece 13b in the circumferential direction. It is drilled along. A stopper 15 is provided so as to project downward at one location of the hanging piece 13b. Further, as shown in FIG. 5 (c), the shaft 1 of the detector main body 1 is provided on the inner surface of the upper portion of the body 2.
A plurality of convex ribs 25 around the bearing 41 into which 0 is inserted.
Ribs 26 are formed on the outer surface of the detector main body 1 that abuts the convex ribs 25 as shown in FIG. 5 (b), and the ribs 26 are projected when the detector main body 1 is rotated. The rib 25 and the rib 26 engage with each other in a concavo-convex manner so that a click feeling can be obtained.

As shown in FIG. 6, the lower cover 3 is formed in the shape of a cylinder with a bottom that opens upward, and the lower cover 3 is formed on the inner periphery of the side surface between the hanging piece 13 b of the receiving portion 13 below the body 2 and the inner surface of the body 2. Ribs 16 that fit into the gaps are formed along the side surfaces. The ribs 16 prevent the body 2 from expanding outward as shown by the arrow when the body 2 is attached as shown in FIG. A locking portion 17 having a roasted upper portion is provided on the inside of the rib 16, and the roasted portion 1 on the upper portion is formed.
The lower cover 3 is attached to the lower surface of the body 2 by holding the receiving portion 13 between the roasted portion 18 and the rib 16 by locking the receiving portion 13 on the upper surface 13a of the receiving portion 13. If the upper surface 13a of the receiving portion 13 is inclined as described above, the roasted portion 18 of the engaging portion 13 can be securely retained as shown in FIG. 8 (b) even if there is a dimensional error. As shown in FIG. 8 (a), a gap is not generated between the roasted portion 18 and the upper surface of the receiving portion 13a as in the case where the upper surface 13a of the receiving portion 13 is made flat, and rattling does not occur. An L-shaped elastic contact piece 19 is formed on the bottom surface of the lower cover 3 and has a projection 20 elastically contacting the groove 14 formed in the receiving portion 13 of the body. When the body 20 is rotated in the circumferential direction in a state where the protrusion 20 of 19 is elastically contacted with the groove 14, a click feeling is obtained. Further, a stopper 21 is projectingly provided at the position of the lower end surface of the receiving portion 13 of the body 2, and the stopper 21 comes into contact with the stopper 15 projectingly provided on the lower end surface of the receiving portion 13. The rotation of the body 2 is prevented from rotating more than 360 °. As shown in FIG. 1, a terminal portion 22 having a terminal screw is provided on the lower surface of the lower cover 3, and the output of the object detection circuit pulled out through a hole 23 formed in the lower portion of the detector body 1. The line 24 is adapted to be connected.

A base 4 is attached to the lower portion of the lower cover 3, and a locking portion 28 that locks with an L-shaped claw piece 27 formed on the lower cover 3 is formed. Like the lower cover 3, it can be attached without using screws or the like. The bottom plate of the base 4 is provided with a screw hole 29 for attaching the heat ray detector to a construction surface such as a wall surface, and a retaining rib 31 for attaching the screw 30 used at the time of attachment to the bottom face is provided. . A knockout for drawing out the wiring is also provided on the bottom surface of the base 4, but it is not shown.

The appearance of this heat ray type detector after assembly is shown in FIG. This heat ray type detector A rotates the body 2 in the circumferential direction to obtain 360 °.
Since the detector body 1 can be rotated in the vertical direction along the opening 11 of the body 2 by about 90 degrees,
Even when mounted on any wall surface B as shown in Figures 1 (a) and (c), or on the ceiling C as shown in Figure 11 (b), the detection area can be freely changed, and the mounting location is limited. Never be done. Moreover, as shown in FIG. 12, the horn 32 is used in consideration of the case of use in an ultrasonic detector.
A fixing portion 33 for fixing the above is formed on the inner surface of the detector body 1 in advance, and a mounting rib 35 for mounting the printed circuit board 6 downward when the horn 32 is mounted.
By forming the above, the detector body 1 can be used also for heat rays or ultrasonic waves.

[Advantages of the Invention] As described above, according to the present invention, the detector main body is rotatably pivoted in the vertical direction and is housed by being pivotally attached to the body, and the lower cover is rotatably pivoted in the circumferential direction on the lower surface of the body. Since it is attached, the detector main body can be rotated in the vertical direction and the body can be rotated in the circumferential direction. Therefore, the detection area can be arbitrarily set, and the mounting location of the object detector is not limited. Moreover, by forming a rotating mechanism in the detector body, body and lower cover, there is no need for a special detection area changing device for changing the detection area, and the object detector can be miniaturized. There is. In addition, the concave-convex engaging portion that imparts the first and second click feelings can change the detection direction by a constant angle, and thus the detection direction can be easily adjusted.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a perspective view of the same as above, FIG. 3 is a sectional view of an upper part of the same, FIG. 4 is a perspective view of an upper part of the same, and FIG. ) To (c) are explanatory views showing the structure of the main part of the above, FIG. 6 is a cross-sectional view of the attachment portion of the body and the lower cover, and FIG. 7 is a cross-sectional view after attachment of the body and the lower cover,
8 (a) and 8 (b) are explanatory views of the main part of the mounting portion of the body and the lower cover of the same, and FIGS. 9 (a) and 9 (b) are schematic configurations showing a heat ray detecting element used in the same. Fig. 10 is an explanatory view of the attachment to the lower cover of the same body, Fig. 11 is an explanatory view showing the state of attachment to the construction surface of the same body, and Figs. 12 (a) to (c) are the same storages, respectively. FIG. 3 is a cross-sectional view showing a structure in the case where the part is also used as an ultrasonic detector. 1 is a detector body, 2 is a body, 3 is a lower cover, 4 is a base, 5 is a Fresnel lens, 7 is a heat ray detecting element, 10 is an axis, 11 is an opening, 14 is a groove, 19 is an elastic contact piece, 20 is A protrusion, 25 is a convex rib, 26 is a rib, 33 is a fixed portion, and 41 is a bearing.

Claims (2)

[Claims] 1. A substantially spherical detector body in which an object detecting element is housed, a body in which the detector body is rotatably pivotally mounted and housed, and a lower part thereof has a cylindrical shape. It consists of a lower cover that is attached to the lower surface of the body so as to be rotatable in the circumferential direction, and a base that is attached to the construction surface and to which the lower cover is fixed, and the outer surface of the detector body and the inner surface of the body are mutually A first concave-convex engaging portion is formed that engages with the concave-convex to give a click feeling as the detector body rotates, and also engages concave-convex with the lower inner peripheral surface of the body and the lower cover to form the body. The second to give a click feeling with the rotation
An object detector formed by forming the concave and convex engaging portions of. 2. An opening window for mounting an optical system such as a Fresnel lens for concentrating heat rays is formed in the detector body, and mounting portions for mounting the optical system and horns for transmitting and receiving ultrasonic waves are provided. The object detector according to claim 1, wherein the object detector is provided inside the detector body.