JPH02264884A - Object detector - Google Patents

Abstract

PURPOSE:To enable execution of an easy and accurate operation for setting a detection area by a construction wherein the main body of a detector accommodating a component for detecting an object is supported by a case so that it can rotate freely in the circumferential direction and the perpendicular direction. CONSTITUTION:A virtually spherical main body 1 of a detector accommodating a component 3 for detecting an object and a case 10 accommodating said main body are provided, and the main body 1 is made rotatable in the circumferential and perpendicular directions thereof. For this purpose, rotation pivots 6 and 7 are formed oppositely in the direction of the diameter on the outer circumference of the main body 1, while a guide groove 13 holding said rotation pivots 6 and 7 movable in the circumferential direction is formed in the case 10. Besides, a click means 20 enabling the rotation of the main body 1 in the circumferential and perpendicular directions to the case 10 and conducting the decision of the position of the main body 1, i.e. the setting of a detection area, is constructed of a projection 21 formed on the main body 1 and a plurality of projections 22 formed circularly on the inside of the case 10 and being engageable elastically with the projection 21. An adaptor 30 to be fitted to an attachment is provided on the base of the case 10.

Description

[Detailed Description of the Invention] 1-1-1 The present invention relates to an object detector for detecting the presence or absence of a human body or other objects, and in particular a passive type heat ray having no light emitting part. This can be very effectively implemented as a type detector.

2. Description of the Related Art Conventionally, various hot-ray object detectors that detect the presence of an object by detecting heat rays radiated from the object have been commercially available or have been proposed.

Recently, they do not have a light emitting part and can physically detect objects in a wide detection area. So-called passive hot-wire object detectors have become widely used.

Such a hot-wire type object detector detects an object three-dimensionally as described in 1-1, and at the same time often uses multiple sensing elements as a hot-wire detector to improve noise resistance. However, there is a problem in that the detection directionality of the object detector occurs, which limits the mounting location.

In order to solve this problem, an object detector has been proposed in which the storage body containing the heat ray detector is structured so that it can be rotated within a range within the mounting range with respect to the base. 6
3-158493).

The object detector described in Japanese Patent Application Laid-Open No. 63-158493 has a substantially spherical detector body in which an object detection component for detecting an object is housed, and this detector body is pivoted so as to be freely rotatable in the vertical direction. It has a structure including a body whose lower part is formed into a cylindrical shape, and a lower cover rotatably attached to the lower surface of the body in the circumferential direction.

In this way, in conventional object detectors, in order to set the detection area, the detector body rotates downward (), and the body housing the detector body rotates circumferentially with respect to the door cover. Therefore, two different rotating parts or rotating means are required, making the mechanism very complicated. Furthermore, the axes of the two seven-stage rotation stages must be set independently, making the setting work difficult.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an object detector which has a structure with a width of m and which allows the setting of the detection area when installing the object detector to be easily and accurately performed.

The following objects are achieved by the object detector according to the present invention. In summary, the present invention includes a substantially spherical detector body in which an object detection component for detecting an object is housed, and a case housing the detector body, and includes In an object detector with Ii re rotation, a rotation support shaft is formed on the outer periphery of the detector main body to face each other in the diametrical direction, and a guide is provided in the case to hold the rotation support shaft movably in the circumferential direction. This is an object detector characterized by having grooves formed therein. Further, click means is provided to enable rotation of the detector body in the circumferential direction and right angle direction and to set the detection area. Preferably, the click means includes a projection formed on the detector body and a case. It is composed of a plurality of protrusions that are formed in an annular shape on the inner surface and can be elastically engaged with the protrusions.

The bottom of the case is also preferably provided with an adapter for attachment to an attachment mounted on a wall or ceiling.

1. Next, the object detector according to the present invention will be explained in more detail with reference to the drawings.

In the embodiment shown in FIGS. 1 to 4, the present invention is embodied as a hot wire type object detector using a Fresnel lens in the optical system, but the present invention is not limited to this.

As understood with reference to FIG. 1, in this example,
The object detector has a generally spherical detector main body 1 having a hood portion 1a that is a hemispherical Fresnel lens, and a base portion tb to which the foot portion 1a is fixed. Hood part 1a
The entire lens can be made of a Fresnel lens, but only the necessary parts.

For example, object detection parts 3 such as a heat ray detector which will be explained later.
It is also possible to make only the central region facing the Fresnel lens.

The base portion 1b is provided with a circular bottom plate 2, and the bottom plate 2 includes a heat ray detector 3 and a printed circuit board on which electrical components and wiring are applied to process the electrical signals output from the heat ray detector 3. The board 4 is fixed with a member such as a screw 5.

The object detector has a case 10 that accommodates and holds the detector body l. It is preferable that the inner surface 10a of the case 10 is formed to have a complementary shape to the outer surface of the detector main body 1, and therefore has a spherical shape in this embodiment. Also, as can be understood by referring to FIG. 2, ribs 11, 12 are formed in an annular shape on the inner surface 10a and spaced apart from each other. Rotation support shafts 6 and 7 formed diametrically opposite to each other on the outer periphery of the base portion 1a of the detector body 1 are fitted into the guide groove 13 defined by the annular ribs 11 and 12. . Therefore, the detector main body l can rotate in the circumferential direction (θ direction in FIG. 5) with respect to the case 10 by the rotation support shaft 6.7, and at the same time, the It is possible to rotate in a direction perpendicular to the circumferential direction (ψ direction in FIG. 5).

In addition, the printed circuit board 4 of the detector main body l and the external control device 21 (
A terminal 8 is attached to the bottom plate 10b of the case 10 in order to input and output signals to and from (not shown), and a cable 9 is connected between the terminal 8 and the printed circuit board 4. The cable 9 is configured to pass through a through hole 2a formed in the center of the bottom plate 2 of the detector body 1 in order to perform relative rotational movement between the detector body 1 and the case IO without resistance.

However, in order to prevent the cable 11 from breaking,
In this embodiment, the guide groove 13 of the case 10 includes a second
As shown in the figure, stoppers 13a that limit rotation of the detector body 1 are formed diametrically opposed to each other. Therefore, the rotation support shaft 6 of the detector body 1 is attached to the stopper 13a.
7 in the circumferential direction of the detector body 1, that is,
Rotation in the θ direction is prevented from exceeding 180'.

As shown in FIG. 6, there is a click means for enabling rotation of the detector body 1 in the circumferential direction and right angle direction with respect to the case 10, and for setting the position of the detector body 1, that is, setting the detection area. In this embodiment, the click means 20 includes projections 21 and 21 formed on the outer periphery of the base portion 1b of the detector main body 1 in a manner perpendicular to the rotation support shafts 6 and 7. and a plurality of annular projections 22 formed on the inner surface of the case 10.

To explain further, on the inner surface of the case IO, as shown in FIG. 7, a large number of protrusions 22 are formed annularly in the circumferential direction so as to be spaced apart from each other.

The protrusion 21 formed on the detector body elastically moves the protrusion 2
2, and as shown, four protrusions 22
The detector body 1 is positioned by the protrusion 21 of the detector body 1 sitting in the valley of the detector body 1. In this way, the protrusion 21
The inner surface of the case 10 on which the protrusion 22 is formed has a part of a spherical surface or a hemispherical shape so that the protrusion 22 can come into elastic contact with the protrusion 22 . Further, in order to suitably achieve the click means 20, it is preferable that the detector main body l, the case 10, etc. be made of synthetic resin or the like.

According to this embodiment, the object detector further includes a bottom plate portion fob of the case 10 for fixing the case 10 to a wall or ceiling.
Adapter 3 detachably attached to the
has 0. Further, the object detector according to the present invention is removably attached to an attachment (not shown) fixed to a wall or ceiling via the adapter 30.

The object detector according to the present invention has the above configuration.

The rotation of the detector body l in the circumferential direction, that is, in the θ direction, is performed by rotating the rotation support shaft 6.7 formed on the base portion 1a of the detector body in the circumferential direction within the guide groove 13 formed on the circumference of the case 10. This is done by rotating.

In addition, in this embodiment, the rotation of the detector main body l in the circumferential direction is 1
Although it is designed not to rotate more than 80 degrees, if further rotation is required, the mounting position of the case lO and adapter 30 can be changed by 1800 degrees in the circumferential direction of the detector body l. It may be possible to set up a detection area over 3600.

To set the detection area in the perpendicular direction, that is, in the ψ direction, the detector body 1 can be set by rotating the detector body 1 in the ψ direction around the rotation support shaft 6.7 formed in the detector main body 1. It is done.

The rotation of the detector main body l in the θ and ψ directions and the setting of the detection area are achieved by the click means 20 with a click sensation. The click means 20 also prevents the detection area from changing due to vibrations or the like.

In the above embodiment, the shape of the hood portion 1a of the detector body 1 is described as being hemispherical.
It has the feature that the hood part 1a and the case 1O can be removed during operation.

As long as it does not contact the surface 10a, the hood portion 1a is left alone, α
Taking the shape of is 11fl.

Furthermore, as mentioned above, the object detector according to the present invention is preferably detachably attached to an attachment fixed to a wall or ceiling via the adapter 30.
If necessary, use case 10 without using adapter 30 etc.
It is also possible to directly fix it to a wall or ceiling.

Furthermore, the present invention is not limited to a hot wire type object detector, but can also be embodied as an ultra-A wave type object detector, for example.

As described above, in the object detector according to the present invention, the detector main body housing the object detection component for detecting an object is arranged in the circumferential direction (0 direction) and in the perpendicular direction ( Because it is supported by the case so that it can freely rotate in the ψ direction), the structure is extremely cylindrical, and the object detector
You can easily and accurately set the detection area during installation.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the object detector main body according to the present invention. FIG. 2 is a perspective view of the object detector with the detector main body removed. FIG. 3 is a perspective view of the detector body. FIG. 4 is an f-plane view of the main body of the detector. FIG. 5 is a perspective view of the object detector. FIG. 6 is a cross-sectional view of the object detector taken in a direction perpendicular to FIG. 1, and electrical parts and the like inside the detector body are omitted. FIG. 7 is a diagram illustrating the operation of the click means. l: Detector body 3: Object detection parts 6.7: Rotation support shaft lO: Case 13: Guide groove 20: Click means 30 Near adapter

Claims (1)

[Claims] 1) A substantially spherical detector body in which an object detection component for detecting an object is housed, and a case housing the detector body; In the object detector capable of rotating, a rotary support shaft is formed on the outer periphery of the detector body to face each other in a diametrical direction, and the rotary support shaft is held in the case so as to be movable in the circumferential direction. An object detector characterized by forming a guide groove. 2) The object detector according to claim 1, further comprising click means for enabling rotation of the detector body in the circumferential direction and in the right angle direction and for setting the detection area. 3) The click means includes a protrusion formed on the detector body;
Claim 2 characterized by comprising a plurality of protrusions formed in an annular shape on the inner surface of the case and capable of elastically engaging with the protrusions.
The object detector described. 4) The object detector according to any one of claims 1 to 3, wherein the bottom of the case is provided with an adapter for attachment to an attachment attached to a wall or ceiling.