JPH11167678A - Detection direction variable type human body detection sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detection direction variable type human body detection sensor which easily and also surely sets a desired detection area in a desired detection direction and is mounted at various installation places. SOLUTION: The supporting plane 2 of a base 1 is supported by a wall, a ceiling or a desk. A sensor case 3 is provided with a pair of infrared detection elements having mutually opposite polarities. Lenses 8 and 9 which sets a detection area of the infrared detection elements are provided on a lens body 7. The case 3 is provided with a rotational support mechanism 10 which is supported in a freely rotatable way around a 1st shaft center 11 that is in parallel with the plane 2 against the base 1 and a 2nd shaft center 12 that crosses orthogonally to it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection direction variable type human body detection sensor capable of changing the pattern and direction of a detection area in which a human body can be detected by an infrared detection element set by an optical element such as a lens. It is.

[0002]

2. Description of the Related Art In general, a human body detection sensor provided with a passive infrared detection element sets an infrared area (detection area) to be incident on the infrared detection element by an optical element such as a lens or a reflection mirror, and detects the detection area. Infrared rays radiated from the human body entering the inside are focused on the infrared detecting element, and when the fluctuation amount of infrared energy from the detecting area based on the output of the infrared detecting element exceeds a predetermined level, the detecting area is detected. It is configured to detect entry of a human body into the inside. Such a human body detection sensor is widely used as a start switch for opening and closing an automatic door and operating a security alarm device.

In this type of human body detection sensor, when detecting a human body in a relatively wide area such as a doorway of a building, a plurality of spot-like detection areas are arranged in a direction orthogonal to the moving direction of the human body. A wide-type optical element that can be set by using the optical element is used. On the other hand, when a human body moving in the direction approaching the wall behind the house is detected along the wall,
A narrow optical element that can set a single detection area only in a relatively small required place is used. On the other hand, conventionally, a human body detection sensor having a configuration called a changeable optical element capable of selectively facing a wide-type optical element and a narrow-type optical element to an infrared detection element according to an application is known. Exists. This human body detection sensor removes an optical element holder having multiple types of optical elements from the main body, reverses its position, and attaches it to the main body,
By rotating, a desired optical element can be selected.

[0004]

However, in the conventional human body detection sensor having a plurality of types of optical elements, the type of the optical element can be simply selected and the optical element can be arranged to face the infrared detecting element. When setting the detection direction at a desired location, it is possible to attach it to a wall or ceiling in an arrangement facing the direction of the detection area, regardless of the pattern and setting method of the detection area according to the difference in optical elements. Can only respond. Therefore, the detection area may not be set in a desired detection direction in an installation place where an appropriate mounting position is limited, for example, on a desk.

In addition, this type of human body detection sensor does not erroneously detect a change in background temperature in a detection area due to a strong wind or the like, and a change in infrared energy due to external radio noise or disturbance light such as direct sunlight. As described above, in general, a pair of detecting elements in which two pairs of infrared detecting elements are differentially connected to each other in opposite polarities are used. The two detection areas corresponding to the two infrared detection elements are arranged along a direction in which the human body to be detected is expected to move. Thus, while the human body crosses the two detection areas with a certain time difference, background noise due to disturbance light or the like is simultaneously generated in each detection area, and only background noise is applied between the two detection areas. It offsets and prevents false detection. In such a human body detection sensor in which a pair of infrared detection elements are differentially connected, it is necessary to set the arrangement direction of the two infrared detection elements in accordance with the moving direction of the human body to be detected. This is hereinafter referred to as “directivity” of the sensor. Conventionally, the sensor body is oriented in the desired direction and the directivity of a pair of infrared detection elements is supported, but this not only complicates the work such as mounting and setting the detection area, but also limits the place where it can be installed. Will be done.

Accordingly, an object of the present invention is to provide a variable detection direction human body detection sensor that can easily and reliably set and mount a desired detection area in a desired detection direction regardless of the installation location. It is assumed that.

[0007]

Means for Solving the Problems 1. In order to achieve the above object, a variable detection direction human body detection sensor of the present invention comprises a base having a support surface supported by a support, and a pair of opposite polarities. A sensor case having an infrared detection element, an optical body having an optical element for setting a detection area of the infrared detection element, a first axis parallel to the support surface with respect to the base and the axis; The second orthogonal to the heart
And a rotation support mechanism for rotatably supporting the shaft around the axis.

In this variable detection direction human body detection sensor, when the sensor case having a pair of infrared detection elements is swung about a first axis parallel to a support surface of the base with respect to the base, the infrared case is rotated. The detection region of the human body by the detection element can be changed. Further, when the sensor case is rotated around a second axis orthogonal to the first axis, the directivity of the human body detection by the pair of infrared detecting elements can be changed. The direction can be easily set to match the direction in which the human body moves.
Therefore, regardless of the installation location, the human body detection sensor can support the base in such a manner that the infrared detection element and the optical body opposed thereto are oriented in the desired detection direction as much as possible at the installation location. After the surface is supported at the installation location, the sensor case is rotated in one or both directions around the first axis or the second axis, so that the detection area is formed in a desired detection direction and detection pattern. Can be set.

The rotation support mechanism according to the present invention includes a main case attached to the opening of the base so as to be openable and closable, and a holder case fitting slidably fitted in a fitting hole of the main case in a longitudinal direction thereof. A holder case that is rotatable about the first axis by the slide, and that slidably supports the holder case fitting portion in the fitting hole and rotates about the second axis. It is possible to provide a configuration including a slide support member that supports the slide case and a lock member that is attached to the slide support member and that prevents the holder case fitting portion from rotating around the second axis.

[0010] Thus, it is possible to achieve a rotation supporting mechanism for rotatably supporting the sensor case around the first axis and the second axis with a simple configuration. In addition, since the holder case can rotate around the second axis only when the holder case fitting portion has removed the lock member from the slide member, the holder case can be rotated around the second axis. After adjusting the arrangement direction of the pair of infrared detection elements to match the moving direction of the human body to be detected, and attaching the lock member to the slide member, the pair of infrared detection elements adjusts the relative position with respect to the holder case in the adjustment state. Fixed to Therefore, even if the holder case fitting portion of the holder case is then slid in the longitudinal direction of the fitting hole to rotate the holder case around the first axis,
The relative position between the pair of infrared detecting elements and the holder case holds the above-mentioned adjustment state. Thereby, the operation of setting the detection area in the desired detection direction and detection pattern can be easily and accurately performed.

In the human body detection sensor according to the present invention, the optical body is provided with a plurality of optical elements fixed to the sensor case to set a plurality of different detection areas, and further fixed to the holder case. A mask that covers the front surface of the optical body and exposes only the selected optical element, wherein the sensor case is formed in a holding hole formed in the holder case fitting portion of the holder case around the second axis. It can be configured to be rotatably held. Thus, when the sensor case is rotated around the second axis with respect to the holder case, any one of the plurality of optical elements of the optical body fixed to the sensor case is selected and exposed from the mask of the holder case. You. Since a plurality of optical elements can set different detection areas, for example, detection of a pattern adapted to the installation location from among a plurality of spot-shaped detection areas (wide type) or a single narrow detection area (narrow type). The area can be selected and switched easily.

Further, in the present invention, the rotation support mechanism includes a main case attached to an opening of the base so as to be rotatable around the second axis, and the sensor case is configured to fit the main case. A sensor case fitting portion slidably fitted in the longitudinal direction of the hole, the sensor case fitting portion being set to be rotatable around the first axis by the slide; It is possible to provide a structure having a slide support member slidably supported in the fitting hole. Accordingly, the sensor case is rotated around the second axis through the main case by rotating the main case with respect to the base, thereby changing the directivity of the human body detection in the arrangement direction of the pair of infrared detecting elements. In addition, the sensor case fitting portion slides into the fitting hole of the main case in the longitudinal direction to rotate around the first axis, thereby changing the direction of the detection area of the human body by the infrared detecting element. it can.

In the present invention, the optical body has an optical element fixed to the sensor case to set a plurality of different detection areas, and further, the optical element selected over a front surface of the optical body. A mask that only exposes elements
The sensor case or the optical body may be configured to be rotatable about a third axis. In this configuration, when the mask is rotated around the third axis, any one of the plurality of optical elements of the optical body is selected and exposed from the mask. Therefore, it is possible to select a pattern of the detection area suitable for the installation location.

In the present invention, the holder case fitting portion or the sensor case fitting portion may be supported by the slide support member so as to be slidable in the width direction of the fitting hole. Thereby, the infrared detecting element and the optical body can be finely adjusted by slightly rotating the infrared detecting element and the optical body also in the width direction of the fitting hole, that is, about the axis perpendicular to the first and second axes.

[0015]

Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cut-away right side view showing a variable detection direction human body detection sensor according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a main part thereof. An outline will be described. This human body detection sensor can be roughly classified into a base 1 having a flat support surface 2 supported by a wall, a ceiling or a desk, and a hollow hemispherical shape having a pair of infrared detection elements 4a and 4a inside. A sensor case 3 accommodating a sensing element pair 4 composed of 4b, and two lenses 8 having a hollow hemispherical shape and for setting a plurality of different sensing areas of the infrared sensing elements 4a and 4b on its outer surface. , 9 (a kind of optical element: FIG. 2) are formed, and a rotation support mechanism 10 is provided. The rotation support mechanism 10 is configured such that the sensor case 3 to which the lens body 7 is fixed is fixed to a base 1 by a first axis 11 (FIG. 1) parallel to the support surface 2 and the first axis 11. The second orthogonal to
It is supported rotatably around the axis 12 (FIG. 1) of
Next, the structure will be described.

A rotation support mechanism 10 for rotatably supporting the sensor case 3 includes a main case 14 which is attached to the opening 1a of the base 1 so as to be openable and closable, and a long hole which is curved in an arc shape of the main case 17. A holder case 17 having a holder case fitting portion 19 which is slidably inserted into the fitting hole 18 in the longitudinal direction X thereof, and is rotatable around the first axis 11 by sliding. A slide support member 20 (FIG. 1) that fits into the portion 19 and slidably supports the fitting portion 19 in the fitting hole 18 and rotatably supports the second shaft 12 around the second axis 12.
A lock member 21 (FIG. 1) is attached to the slide support member 20 to prevent the holder case fitting portion 19 from rotating around the second axis 12. In addition,
In FIG. 2, illustration of the slide support member 20 and the lock member 21 is omitted.

Next, details of each of the above-mentioned components will be described. FIG. 3 is an enlarged view of FIG.
FIG. 2 is a horizontal sectional view of a main part of FIG. The main case 14 of FIG. 1 is rotatably connected to the base 1 with the support shaft 13 as a fulcrum in a range between a solid line position and a two-dot chain line position. The opening 1a is opened and closed by being detachably fitted by a well-known uneven fitting structure.
As shown in FIG. 4, the main case 4 has a hemispherical holding receiving portion 22 that can fit the hemispherical holder case 17 so that the entire outer surface of the holder case 17 rotates while sliding. Have been. This holding receiving part 22
Is formed with a long hole-shaped fitting hole 18 extending in the circumferential direction through the center portion thereof, and guides along the edges of both side holes extending in the longitudinal direction X (FIG. 3) of the fitting hole 18. The rail 23 protrudes rearward.

The following components are attached to the main case 14 in the following structure. That is, in the hemispherical holder case 17, a mask 24 having substantially the same hemispherical shape is fitted and adhered to each butted peripheral surface, and integrated into a substantially spherical shape. Rear part, that is, holder case 17
The holder case fitting portion 19 protrudes from the rear portion. The sphere composed of the holder case 17 and the mask 24 is attached to the main case 14 by a holder case fitting portion 19.
Is inserted into the fitting hole 18 so as to be rotatable while slidingly contacting the holding receiving portion 22, and the holding receiving portion 2 is provided with a retaining structure for the holder case fitting portion 18 described later.
2 is held.

As shown in FIG. 3, the holder case fitting portion 19 is a cylindrical body having a square cross section with four rounded corners and a holding hole 33 with a circular cross section inside. ing. On the outer peripheral surface of the rear end portion of the holder case fitting portion 19, a retaining flange 31 having a claw-shaped cross section shown in FIG.
Locking notches 32 are provided at four positions at 90 ° intervals at the rear end of the holder case fitting portion 19 including the notch 1.

On the other hand, in the sensor case 3, which is a hollow hemisphere, lens elements 7 having substantially the same hollow hemisphere shape are connected to each other at the peripheral ends of the openings by a well-known uneven fitting structure. The sphere of the sensor case 3 and the lens body 7 is housed inside the sphere of the holder case 17 and the mask 24. Further, from the rear part of the sensor case 3, a cylindrical support cylinder 3 having an outer diameter slightly smaller than the inner diameter of the holding hole 33 of the holder case fitting portion 19 in the holder case 17.
4 are protruded. The sphere composed of the sensor case 3 and the lens body 7 rotates around the second axis 12 around the support cylinder 34 inserted through the holding hole 33 of the holder case fitting portion 19 and held rotatably. Holder case 1 possible
7 is held.

As shown in FIG. 3, two claw portions 37 are formed on two outer surfaces of the support tube portion 34 which are opposed to each other in the radial direction at the distal end. As shown in FIG. The support cylinder portion 34 is prevented from falling out of the holder case fitting portion 19 because the two claw portions 37 are slidably engaged with the distal end surface of the holder case fitting portion 19 of the holder case 17. It is held rotatably in the state. Further, two notches 38 for rotating operation are provided at two positions in the distal end portion of the support cylindrical portion 34 which face each other in the radial direction orthogonal to the arrangement direction of the both claw portions 37.
Are formed. By inserting a screwdriver or a coin into the notches 38 and rotating the sphere, the spherical body of the sensor case 3 and the lens body 7 is rotated about the second axis 12 in FIG. Thus, the relative position between the lens body 7 and the mask 24 can be changed.

Next, the lens body 7 and the mask 24 whose relative positions are changed as described above will be described. As shown in FIG. 2, the lens body 7 includes a wide-type lens 8 for setting a plurality of spot-shaped detection areas in a row, and a narrow-type lens for setting a relatively narrow single detection area. 9
Are formed in a cross-shaped arrangement. In this embodiment, the wide type lens 8 has a shape capable of setting five spot-shaped detection areas for each of the infrared detection elements 4a and 4b. The central portion where both lenses 8 and 9 intersect has a shape that can be shared by both lenses 8 and 9.

Further, inside the sensor case 3, a printed circuit board 43 on which a pair of infrared detecting elements 4a and 4b and an indicator lamp 44 are mounted is fixed to a supporting projection 47 formed integrally with the sensor case 3. As shown in FIG. 1, it is pinched and fixed by the claws 48. Therefore, the lens body 7 and the infrared detecting elements 4a and 4b move integrally while always maintaining a preset relative position. Sensing element pair 4
Has a configuration in which a pair of infrared detecting elements 4a, 4a are differentially connected to each other in opposite polarities.
A driving power is supplied from a battery 55 attached to the base 1 to the a, 4a, the indicator lamp 44, and the like.

On the other hand, the mask 24 shown in FIG.
A single light passage hole 27 having the same hole shape as the outer shape of the lenses 8 and 9 is formed. By changing the relative position between the lens body 7 and the mask 24 at a rotation interval of 90 ° as described above. Only one of the lenses 8 or 9 is exposed to the outside through the light passage hole 27. Further, a wide display hole 29 and a narrow display hole 30 are formed in the mask 24 at an angle of 90 ° with respect to the center of the mask, and the relative position between the lens body 7 and the mask 24 is rotated by 90 °. When a desired lens 8 or 9 is selected by changing the interval, the indicator light 44 faces the display hole 29 or 30 corresponding to the selected lens 8 or 9, and the selected lens 8 or 9 is displayed by the indicator light 44. Is displayed.

The indicator lamp 44 is provided with an infrared detecting element 4a,
The display of the human body detection by 4b is also used for the display of the selected lens 8 or 9, and the display of the human body detection is performed by blinking the display lamp 44, and the display of the selected lenses 8, 9 is performed by continuous lighting. It has become. In the vicinity of the display holes 29 and 30 in the mask 24, characters W and N indicating wide and narrow are drawn. Narrow state can be easily identified

FIG. 5 is a perspective view of the slide support member 20. The slide support member 20 has a main body portion 39 in a rectangular frame shape, and a guide portion 40 having a U-shaped cross section having a guide groove 49 is provided at both positions in the longitudinal direction of the main body portion 39. This guide groove 49 corresponds to FIG.
Slidably engage with both guide rails 23 of the main case 14. Further, on the outer surfaces of two opposed long sides of the main body portion 39 in FIG. 5, a locking ridge portion 41 protrudes along the rear edge. A stopper portion 42 is protrudingly provided on inner surfaces of the main body portion 39 facing each other in the longitudinal direction.
In addition, the main body 39 and the guide 40 are curved to have a curvature capable of slidingly contacting the outer surface of the main case 14 and the guide rail 23 in FIG.

As shown in FIG. 3, the main body 39 has a shorter rectangular inner dimension D and an outer dimension d of the holder case fitting portion 19 having a substantially square cross section in the holder case 17.
It is set slightly larger than. The slide support member 20 allows the holder case fitting portion 19 of the holder case 17 to pass through the main body portion 39 and engages the retaining flange portion 31 with the rear surface of the main body portion 39 where the locking streak portion 41 is provided. As a result, the guide rails 23 are fitted in the guide grooves 49 of the guide portions 40 on both sides while being attached to the holder case fitting portion 19, and are slidably attached to the two guide rail portions 23. ing.

Therefore, as is clear from FIG. 4, the slide support member 20 and the holder case 17
9 and the retaining flange 31 are connected to each other to prevent the main case 14 from being pulled out of the guide rail 23 and the holding receiver 22. Further, the holder case fitting portion 19 is provided in the main body 3 in FIG.
9 has an outer dimension d smaller than the inner dimension D, and the four corners have a substantially square cross-sectional outer shape formed in a round shape. It is becoming modest. That is, the mask 2 shown in FIG.
The holder case 17, which forms a sphere together with 4, can be pivoted at an angle of 90 ° around the second axis 12 using the holder case fitting portion 19 as a rotation support shaft.

Further, the holder case 17 is rotatable around the first axis 11 with respect to the main case 14 via a slide support member 20 which slides on the guide rail portion 23. The length of the fitting hole 18 is set so as to rotate the holder case 17 within an angle range of 90 °. Further, the holder case fitting portion 19 is slidable in the width direction of the fitting hole 18 within a range until the holder case fitting portion 19 comes into contact with the stopper portions 42 on both sides of the slide support member 20.
Thereby, the holder case 17 is slightly rotatable about an axis perpendicular to both the first and second axes 11 and 12.

6A and 6B show the lock member 21, wherein FIG. 6A is a front view, FIG. 6B is a plan view, FIG. 6C is a cross-sectional view taken along line CC of FIG. Show. The lock member 21 has a square frame shape that allows the main body 50 to pass through the holder case fitting portion 19 with a slight gap, and slides from two upper and lower sides of the main body 50. Two locking pieces 52 provided on the inner surface with a fixing groove 51 to be fitted to the locking strip 41 of the member 20 are projected forward, and an operation piece 53 is provided rearward with respect to these locking pieces 52. Are protruded from each other. Further, a locking projection 54 that fits into the locking notch 32 of the holder case fitting portion 19 is provided at the center of each of the upper and lower sides on the inner surface of the main body 50 so as to project rearward.

The lock member 21 is attached to the slide support member 20 by operating as follows. That is, when the operation pieces 53 are pressed toward each other while the holder case fitting portion 19 of the holder case 17 is inserted through the main body 50 of FIG. 4, each operation piece 53 and two continuous members The portion between the locking pieces 52 is deformed, and the locking pieces 52 are displaced in a direction away from each other. While maintaining this state, each of the locking projections 54 is inserted into the two locking notches 32 opposed thereto, and the locking pieces 52 shown in FIG.
When the fixing groove 51 is opposed to the locking streak 41 of the slide support member 20 and the operating force applied to both operation pieces 53 is subsequently released, the locking streak 41 is fitted into the fixing groove 51 and locked. The member 21 is fixed to the slide support member 20. In a state where the lock member 21 is mounted, the rotation of the holder case 17 around the second axis 12 is prevented by the two locking protrusions 54 of the lock member 21 being fitted into the locking notches 32. Will be blocked. However, even when the lock member 21 is attached, the holder case 17 can rotate around the first axis 11.

Next, a procedure for installing the human body detection sensor will be described. First, either the wide lens 8 or the narrow lens 9 of the lens body 7 is selected according to the application. For this purpose, the main case 14 is opened with respect to the base 1 as shown by a two-dot chain line in FIG.
From the rear of the main case 14, a coin or a driver is inserted into the two rotary operation notches 38 of the support cylinder 34,
Rotate in any direction. Thereby, the support cylinder 3
4 rotates in the holding hole 33, and the sphere of the sensor case 3 and the lens body 7 is rotated around the second axis 12 in the second rotation direction (in the sphere of the holder case 17 and the mask 24). FIG. 1) Rotate to R2. At this time, the support cylinder 34
Is rotated by an angle of 90 ° so that the two claw portions 37 face the notches 32 of the holder case fitting portion 19. At this time, the mask 24 does not rotate. As a result, one of the wide type lens 8 and the narrow type lens 9 is selected and positioned so as to be exposed to the outside through the light passage hole 27 of the mask 24, and the unselected lens 8 is selected.
Alternatively, the front surface of 9 is covered with a mask 24. The selected lens 8 or 9 is connected to the corresponding display hole 29 or 30.
The display is performed by projecting the light of the indicator lamp 44 through.

Second, a pair of infrared detecting elements 4a, 4
The arrangement direction of the detection area according to b is adjusted to match the moving direction of the human body to be detected. That is, the directivity is adjusted. For this, the lock member 21 is connected to the slide support member 20.
And the holder case fitting portion 19 is made rotatable with respect to the slide support member 20, and then the mask 24
Is gripped from the outside and rotated in the second rotation direction R2. At this time, the holder case fitting portion 19 of the holder case 17 that rotates integrally with the mask 24 has a substantially square outer shape, and is rotatably rotated at a rotation angle of 90 ° in the main body portion 39 of the slide support member 20. Sensor case 3 and lens body 7
Since the claw portion 37 of the support cylinder portion 34 of the sensor case 3 is engaged with the notch 32 of the holder case fitting portion 19, the sphere of the following shape rotates integrally with the mask 24 and the holder case 17. Thereby, the directivity is changed by 90 °.

When the first and second adjustments have been completed, the lock member 21 is attached to the slide support member 21 by the above-described operation. As a result, the first and second adjustment states are maintained. Next, when the main case 14 is closed and combined with the base 1 as shown by the solid line in FIG. 1, the lock member 21 cannot be removed from the outside. In this state, the support surface 2 of the base 1 is fixed or placed on a required support location such as a ceiling, a wall, or a desk.

After the mounting, a third adjustment for accurately setting the detection area is performed. That is, the mask 24
Is manipulated so as to be swung in the first rotation direction (FIG. 1) R1 while swinging. At this time, the holder case fitting portion 19 is slidable on the guide rail portion 23 of the main case 14 via the slide support member 20.
Since it rotates arbitrarily around the first axis 1 within an angle range of 90 °, the directivity of the infrared detecting elements 4a and 4b selected by the first and second adjustments and the lens 8 (wide) or 9 (narrow) ) Can be set accurately at a predetermined location. In setting the detection area, the worker stands on a place where the detection area is to be set, and the other detection worker performs the swing operation of the mask 24 while the infrared detection elements 4a and 4b detect the worker. Then, the rotation operation of the mask 24 may be stopped when the indicator light 44 is blinked.

As a fourth adjustment, as shown by an arrow Y in FIG. 3, the mask 24 is gripped from the outside without removing the lock member 21 so that the holder case fitting portion 19 The fitting hole 1 is set within a small range until it comes into contact with the stopper portions 42 (see FIG. 5) on both sides.
8 in the width direction. Thus, the entirety of the sensor case 3, the lens body 7, the holder case 17, and the mask 24 can be rotated about axes perpendicular to the first and second 11 and 12, respectively, to finely adjust the detection area.

Next, an actual installation example will be described with reference to FIG. FIGS. 7A and 7B are a side view and a front view showing a state in which a human body detection sensor in which the wide-type lens 8 is selected by the second adjustment is attached to a relatively wide entrance eave 57 such as a building or a house. Are respectively shown. The arrangement direction of the pair of infrared detecting elements 4a and 4b is set by the first adjustment operation so as to match the moving direction of the human body entering and exiting the building as shown by the arrow in FIG.
When a human body passing through such a wide place is detected, as shown in FIGS. 7A and 7B, the wide-type lens 8 is selected and a plurality of (five in this embodiment) spots are selected. The detection area E1 is set in a row parallel to the entrance.

The human body detection sensor according to this embodiment includes
By the second adjustment operation, the support surface 2 of the base 1 is
With reference to the 45 ° angle shown in FIG.
Since the direction of the detection area E1 can be changed by an angle of °, that is, within an angle range of 90 ° as a whole, the detection area E1 is set at an arbitrary position from a position directly below the installation position of the human body detection sensor to a considerably distant position. It is possible to Further, by the fourth adjustment operation, the detection area E1 is moved to the position shown in FIG.
A slight fine adjustment can also be made in the horizontal direction in (b).

On the other hand, when detecting a human body passing through a relatively narrow place, such as when setting a detection area along the back of a house, a narrow detection lens 9 is selected to set a single detection area. . FIG. 7C is a side view of a case where the human body detection sensor in which the narrow-type lens 9 is selected is attached to the pillar 59 on the back of the house, and a single detection area E2 along the wall surface 58 is set. In this example, the arrangement direction of the infrared detecting elements 4a and 4b is set so that the first adjustment operation can detect a human body approaching the wall surface 58 from the near side. Further, the third adjustment operation is performed based on the difference in the use or the installation height, and the 90 °
The detection area E2 can be set in any direction within the range.

In the installation state shown in FIG. 7C, when it is desired to change the detection area E2 in the direction of coming into contact with or separating from the wall surface 58, only the fine adjustment by the fourth adjustment operation can be performed. Therefore,
As shown in FIG. 7D, which is a plan view, if the entire body is mounted in an arrangement rotated by 90 °, the detection of a human body moving in the direction P approaching the wall surface 58 to the detection of a human body moving in the direction Q of the pillar 59 are performed. The detection area E2 can be set arbitrarily within the range up to. As described above, the desired detection areas E1 and E2 can be accurately set in accordance with various installation forms according to the selection of the lenses 8 and 9, and the installation places are limited, so that the conventional installation areas cannot be installed. Even in a certain place, it can be properly installed because the installation form and the means for adjusting the detection areas E1 and E2 are abundant.

Further, the human body detection sensor of this embodiment
Since the reference detection direction is inclined at an angle of 45 ° with respect to the support surface 2, the reference detection direction is not only attached to a surface such as a ceiling or a wall surface as described above, but also shown in FIGS. )
As shown in the figure, the support surface 2 of the base 1 is
It can be stably stopped by placing it on the top. for that reason,
This human body detection sensor has an advantage that it can be used as a desktop type without performing installation work such as making a hole in a wall or a ceiling.
Even in this case, the setting can be made according to the use in either the state where the narrow lens 9 is selected as shown in (e) or the state where the wide lens 8 is selected as shown in (f). In the installation states (e) and (f), it is possible to detect a human body moving in the front-rear direction in the figure, for example, to detect a human body that enters the room by opening a door and automatically turns on an illumination lamp. It can be used for applications.

FIG. 8 is a cut-away right side view showing a variable detection direction human body detection sensor according to a second embodiment of the present invention.
The same or substantially equivalent parts as those in FIG. 1 are denoted by the same reference numerals, and only the configuration different from the first embodiment will be described. This human body detection sensor does not include a holder case, and includes a detection element pair 4 and an indicator light 44.
Hemispherical sensor case 61 having therein
In addition, the lens body 7 is fixed, and the mask 27 is attached rotatably around the first axis 11.

The sensor case 61 is connected to the first and second sensors.
A rotation support mechanism 60 rotatably supporting the shafts 11 and 12A around the main shaft 63 and the sensor case 61 rotatably mounted around the second shaft 12A in the opening 1a of the base. The sensor case 61 is inserted into the elongated fitting hole 18 of the main case 63 in the longitudinal direction X.
And a sensor case fitting portion 64 for sliding the sensor case 63 around the first axis 11 by sliding, and a sensor case fitting portion 6.
4 and a slide support member 62 that slidably supports the fitting portion 64 in the fitting hole 18.

An annular guide groove 67 is formed at the open end of the sensor case 61, and an annular ridge 68 at the open end of the mask 24 is slidably engaged with the guide groove 67. Thereby, the mask 24 is manually moved to the sensor case 6.
It is rotatable around a third axis 12B which coincides with the axis of the annular guide groove 67 within an angle of 90 ° with respect to 1. Also, at the rear opening end of the main case 63, 9
A guide groove 69 having an arc shape of 0 ° is formed, and a ridge 70 at the open end of the base 1 is engaged with the guide groove 69 so as to be slidable in the circumferential direction. Thereby, the main case 63
Is rotatable around the second axis 12A within an angle of 90 ° with respect to the base 1.

In the second embodiment, no lock member is provided. The slide support member 62 has a shape having no locking streak as compared with the slide support member of the first embodiment, and the engaging claw 71 at the front end of the fitting portion 64 of the sensor case 61 engages with the rear end. As a result, the sensor case fitting portion 64
And the sensor case fitting portion 64 is slidably supported by the guide rail portion 23 of the main case 63.

Therefore, in the human body detecting sensor of the second embodiment, the mask 24 is
Is rotated around the axis 12B of the
The selection of the lenses 8 and 9, that is, the selection of narrow and wide, is performed.
By rotating about 2A, an adjustment is made so that the arrangement direction (directivity) of the detection area by the pair of infrared detection elements 4a and 4b matches the movement direction of the human body to be detected, and the first axis is held by holding the mask 24. By rotating around the center 11, adjustment for accurately setting the detection area is performed, and the same effect as in the first embodiment can be obtained.

[0047]

As described above, according to the variable detection direction human body detection sensor of the present invention, the sensor case having a pair of infrared detection elements having opposite polarities is attached to the first case parallel to the support surface of the base. Because it is configured to be rotatable around the axis and around a second axis perpendicular to the axis, the detection area can be easily and accurately set in the desired detection direction and detection pattern in any installation location. Can be set and installed.

[Brief description of the drawings]

FIG. 1 is a cutaway right side view showing a variable detection direction human body detection sensor according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the sensor.

FIG. 3 is an enlarged view as viewed from an arrow A in FIG. 1;

FIG. 4 is a horizontal sectional view showing a main part of the sensor.

FIG. 5 is a perspective view showing a slide support member in the sensor.

FIG. 6 shows a lock member in the sensor, and (a)
Is a front view, (b) is a plan view, (c) is a cross-sectional view taken along line CC of (a), and (d) is a right side view.

FIGS. 7A and 7B show the mounting state of the sensor, and FIGS.
Is a side view and a front view when a wide-type lens is selected, (c) and (d) are side and plan views when a narrow-type lens is selected, and (e) and (f) are used for a desktop type. It is a side view in the case.

FIG. 8 is a cut-away right side view showing a variable detection direction human body detection sensor according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base, 1a ... Base opening, 2 ... Support surface, 3, 6
DESCRIPTION OF SYMBOLS 1 ... Sensor case, 4a, 4b ... Infrared detecting element, 7 ...
Lens body (optical body), 8, 9 ... lens (optical element), 1
0, 60: rotation support mechanism, 11: first axis, 12, 1
2A: second axis, 12B: third axis, 14, 63 ...
Main case, 17: Holder case, 18: Fitting hole, 1
9: holder case fitting portion, 20, 62: slide support member, 21: lock member, 24: mask, 33: holding hole,
57, 59: support, E1, E2: detection area, 64:
Sensor case fitting

Claims (7)

[Claims] 1. A support surface 2 supported by supports 57 and 59.
, A sensor case 3, 61 having a pair of infrared detecting elements 4a, 4b having opposite polarities, and optical elements 8, 9 for setting detection areas E1, E2 of the infrared detecting elements 4a, 4b. The optical body 7 and the sensor cases 3 and 61 are rotatable with respect to the base 1 around a first axis 11 parallel to the support surface 2 and a second axis 12 orthogonal to the axis 11. A human body detection sensor comprising: a rotation support mechanism 10; 2. The rotation support mechanism 1 according to claim 1,
Reference numeral 0 denotes a main case 14 which is attached to the opening 1a of the base 1 so as to be openable and closable, and a holder case fitting portion 19 which is slidably fitted in a fitting hole 18 of the main case 14 in its longitudinal direction. The holder case 17 rotatable around the first axis 11 by the slide, and the holder case fitting portion 19 are slidably supported in the fitting hole 18 and the second shaft 12 A human body comprising: a slide support member 20 rotatably supported around; and a lock member 21 attached to the slide support member 20 to prevent the holder case fitting portion 19 from rotating around the second axis 12. Detection sensor. 3. The optical element according to claim 2, wherein the optical element has a plurality of optical elements fixed to the sensor case to set a plurality of different detection areas. A mask 24 fixed to the holder case 17 to cover the front surface of the optical body 7 and expose only the selected ones of the optical elements 8 and 9; the sensor case 3 is formed in the holder case fitting portion 19; A human body detection sensor rotatably held around the second axis 12 in the holding hole 33; 4. The rotary support mechanism according to claim 1,
0 includes a main case 63 rotatably attached to the opening 1a of the base 1 around the second axis 12A. The sensor case 61 is provided in the fitting hole 18 of the main case 63 in the longitudinal direction. The sensor case fitting portion 64 is slidably fitted to the sensor case, and is set so as to be rotatable around the first axis 11 by the slide. Hole 18
A human body detection sensor including a slide support member 62 that slidably supports the human body. 5. The optical device according to claim 4, wherein the optical body is fixed to the sensor case.
A mask 24 having optical elements 8 and 9 for setting a plurality of different detection areas E1 and E2, and further exposing only the selected optical elements 8 and 9 covering the front surface of the optical body 7; Third axis 12B with respect to sensor case 61 or optical body 7
A human body detection sensor that can be rotated around. 6. The human body detection sensor according to claim 2, wherein the holder case fitting portion is supported by the slide support member so as to be slidable in a width direction of the fitting hole. 7. The human body detection sensor according to claim 4, wherein the sensor case fitting portion is supported by the slide support member so as to be slidable in a width direction of the fitting hole.