JP3151255B2 - Hot wire automatic switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot wire automatic switch for automatically controlling a load on / off by detecting a hot wire radiated from a human body or the like.

[0002]

2. Description of the Related Art As a hot-wire type automatic switch of this type, as shown in FIG. 16, a hot-wire sensor 2 such as a pyroelectric element for detecting a hot-wire radiated from a human body or the like, and a hot- wire is detected by the hot- wire sensor 2. A control unit 3 that outputs a control signal until a predetermined time elapses from a time point; and a switch element 4 such as a relay that is turned on / off in response to the control signal from the control unit 3
Are provided.

[0003] A hot-wire automatic switch is used for the purpose of blinking a light in response to a person entering or exiting a room, and so on.
It is necessary to adjust the detection area of the heat ray sensor 2.
To enable such adjustment, by housing the heat ray <br/> sensor 2 in a rotatable movable member relative to the base, which is attached to the attachment surface such as a ceiling, a hot wire sensor 2 Adjusting the direction of the detection surface has been considered.

[0004]

The conventional hot wire
In the automatic switch, the movable body is mounted so as to move smoothly with respect to the base, so that the detection area can be increased simply by touching the movable body lightly or by applying external vibration to the movable body. There was a problem that it would change.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problem. By providing a movement when the movable body is moved, the movable body can be detected only to the extent that the movable body is lightly touched or an external vibration acts. It is an object of the present invention to provide a hot-wire automatic switch in which the area is not changed.

[0006]

According to the present invention, in order to achieve the above object, a base attached to a mounting surface such as a ceiling, a heat ray sensor for detecting a heat ray radiated from a human body, A switch element that is turned on and off based on the output of the hot-wire sensor, and an exposure hole that is provided in a central portion of the base and has a transmission portion that accommodates the hot-wire sensor and that transmits a heat ray in a portion facing the detection surface of the hot-wire sensor. A spherical movable body rotatably attached to the base so that the transmission portion is exposed to the front side of the mounting surface through the window; and a movable body having a holding opening opposed to the exposure window and having a peripheral edge of the exposure window. And a holding plate fixed to the base so as to be sandwiched between the holding opening and the peripheral edge of the holding opening, and a plurality of concentrically arranged circumferential ribs protrude from a surface of the movable body facing the holding plate. Circumferential ribs on the holding plate Articulating projection elastically contacting the circumference ribs on the opposing surfaces of provided separately from the holding opening, further movable member
Is inserted into the holding opening to regulate the rotation range of the movable body.
That is, a position regulating projection is provided. Claim 2
According to the invention, a plurality of articulation projections are arranged along the periphery of the holding opening.

[0007]

According to the first aspect of the present invention, the heat ray sensor is provided in the spherical movable body, and the periphery of the exposure window provided on the base so as to expose the transmission portion of the movable body for introducing the heat ray to the heat ray sensor. The movable body is sandwiched between the holding plate and a peripheral edge of a holding opening provided in a holding plate fixed to the base, and a plurality of circumferentially arranged concentrically on a surface of the movable body facing the holding plate. Since the ribs are projected and provided on the opposing surface of the holding plate with the circumferential ribs, the articulation projections that elastically contact the circumferential ribs are provided. Articulation will be given. As a result, the direction of the movable body does not change to such an extent that the articulation projection and the circumferential rib are always engaged, and the movable body is lightly touched or an external vibration acts on the movable body. In addition, when changing the direction of the movable body, there is a click feeling, so that a certain operation feeling is given, which leads to an improvement in reliability. Moreover, the movable body is inserted into the holding opening
Position regulating projection that regulates the rotation range of the movable body
Because it is installed, the rotation range of the movable body is restricted
Needless to say, a juncture for giving a click feeling
Inserts a position-regulating projection that restricts the range of rotation of the movable body
Because it is provided separately from the holding opening that
Designed to regulate the rotation range and add click feeling
This has the advantage that the design is easy.
According to the second aspect of the present invention, since the plurality of articulation projections are arranged along the periphery of the holding opening, the circumferential rib and the articulation projection can be reliably elastically contacted.

[0008]

【Example】

(Example 1) FIG. 16 shows a schematic structure of an internal circuit. As in the conventional structure, a heat ray sensor 2 composed of a pyroelectric element for detecting a heat ray from a human body and the like, and a heat ray is detected by the heat ray sensor 2. The control unit 3 includes a control unit 3 that outputs a control signal until a predetermined time elapses from a time point, and a switch element 4 including a relay that is turned on / off in response to the control signal from the control unit 3. A power terminal Ta commonly connected to one end of a power supply path to the control unit 3 and one end of the switch element 4;
And a load terminal Tc connected to the other end of the switch element 4. Here, the power supply terminal Ta, the common terminal Tb, and the load terminal Tc
Each has a pair of connecting parts 5a and 5b. An operation mode changeover switch 6 is inserted between a connection point between the control unit 3 and the switch element 4 and the power supply terminal Ta. The operation mode changeover switch 6 includes a power terminal Ta and a load terminal T.
c and a contact b serving as a second contact connected in series with the switch element 4 and a contact b serving as a second contact connected in series with the switch element 4, the control section 3, the switch element 4, and the load terminal Tc. And a contact c that is not connected to either. When the contact a is selected, the power supply terminal Ta and the load terminal Tc are connected without passing through the switch element 4, so that the power supply terminal Ta and the load terminal Tc are always in a forced ON state, and when the contact b is selected, the control unit 3 and the switch Since the element 4 is connected to the power supply terminal Ta, the load is turned on / off automatically in response to the detection of the hot wire by the hot wire sensor 2, and when the contact c is selected, the control unit 3, the switch element 4, and the load Since each of the terminals Tc is disconnected from the power supply terminal Ta, the terminal is in a forced off state which is always off. By providing the operation mode changeover switch 6 in this manner, the state in which the load is automatically turned on / off by the detection of the hot wire is released, and the load can be turned on / off manually. Further, the control unit 3 includes a variable resistor 7 for varying the time for transmitting the control signal.

As shown in FIGS. 1 to 6, the circuit includes a base 1 having a substantially disc-shaped flange 13.
2 is housed in a case 1 formed by joining a cover 11 having an open bottom surface to the center. The cover 11 is connected to the base 12 by an assembly screw 18 composed of a tapping screw screwed to the base 12. A quick-connecting terminal (not shown) constituting a power supply terminal Ta, a common terminal Tb, and a load terminal Tc is housed in a terminal block 14 protruding from an upper portion of the cover 11. A plurality of electric wire insertion ports 15 for inserting electric wires into the housing are opened. The quick connection terminal is a terminal that mechanically and electrically couples the electric wire inserted from the electric wire insertion port 15 by sandwiching the electric wire between the terminal plate and a locking spring that is a leaf spring. An independent spring piece is provided on the locking spring so that two electric wires can be held between each terminal plate.
Are provided two by two, so that each terminal has a connection portion 5a,
5b are provided.

As shown in FIGS. 1 and 7, a terminal cover 20 is detachably attached to a terminal block 14 protruding from an upper portion of the cover 11. The terminal cover 20 covers the entire upper surface of the terminal block 14, and prevents foreign substances (especially water) from entering the inside of the cover 11 by closing the wire insertion port 15. Terminal cover 20
Is connected to the terminal block 14 by a cover screw 21 screwed to the terminal block 14. The electric wire inserted into the electric wire insertion port 15 is introduced between the terminal block 14 and the terminal cover 20 from the left side in FIG. 5. Even if water enters the terminal cover 20 through the electric wire, the electric wire is inserted. The mouth 15 is prevented from reaching.

In the center of the base 12, a circular exposure window 16 is provided.
A movable body 40 formed in a spherical shape as shown in FIG. 8 is attached to the exposure window 16 so that the angle with respect to the case 1 can be adjusted. The movable body 40 has a heat ray sensor 2
The circuit board 44 on which the circuit board 44 is mounted is mounted.
Is drawn out from the lead-out hole 41e. The lower half of the movable body 40 is provided with a light receiving lens 42 composed of a Fresnel lens as a transmission part for condensing a heat ray to the heat ray sensor 2. That is, the movable body 40 includes a hemispherical movable body 41 as shown in FIG.
A hemispherical light-receiving lens 42 as shown in FIG. 10 and a cylindrical movable frame 4 as shown in FIG. 11 and arranged near the joint between the movable body 41 and the light-receiving lens 42.
And 3. A plurality of positioning projections 4 projecting from the opening edge of the movable frame 43 are provided on the opening edge of the movable body 41.
Positioning recesses 41a into which the respective 3a are inserted are formed. In addition, a plurality of positioning pieces 42 a project from the outer peripheral surface of the opening of the light receiving lens 42, and fit into the positioning grooves 43 b formed on the inner peripheral surface of the opening of the movable frame 43. The light receiving lens 42 is an aggregate of a large number of lens areas having a large number of centers c shown in FIG. 10A, and by changing the amount of light collected by the heat ray sensor 2 according to the direction,
It is configured such that a minute movement of the heat source can be detected as a change in the heat ray. At the center of the outer peripheral surface of the movable body 41, a position regulating projection 41b is protruded, and on the outer peripheral surface of the opening peripheral edge, a pair of shaft pins 41c is protruded at a position substantially apart in the diameter direction. Further, a plurality of circumferential ribs 41d arranged concentrically are protruded around the position regulating protrusion 41b.

The movable body 40 having the above-described structure is similar to that shown in FIG.
As shown in FIG. 3, the movable frame 43 is brought into contact with the periphery of the opening of the exposure window 16 of the base 12, and a circular holding opening 45 formed on a holding plate 45 fixed to the upper surface side of the base 12.
a, the exposure window 1 is inserted with the position regulating protrusion 41b inserted therethrough.
6 and the holding opening 45a. The holding plate 45 is made of an elastic sheet metal as shown in FIG.
3 is formed. Opening 45 for holding
At both ends of the central piece 45b formed with a, fixed pieces 45c fixed to the base 12 by fixing screws 46 (see FIG. 1) which are tapping screws are provided. A hemispherical articulation projection 45d elastically in contact with the circumferential rib 41d is protruded from a portion of the central piece 45b facing the circumferential rib 41d provided on the movable frame 43. Six articulation projections 45d are provided along the opening periphery of the holding opening 45a. Therefore, one of the circumferential ribs 41d and the articulation projection 45d always engage with each other, and the movable body 40
When is rotated with respect to the base 12, articulation is given to the rotation of the movable body 40.

The exposure window 16 in the base 12
A pair of guide ribs 17 (see FIG. 1) having a substantially U-shaped horizontal cross section are formed on the peripheral edge of the movable member 40 so that a shaft pin 41 c protruding from the movable body 40 is engaged. That is, by the engagement of the shaft pin 41c with the guide rib 17, the movement of the movable body 40 is restricted so as to move the shaft pin 41c in the plane including both the guide ribs 17. 17 and the rotation about the shaft pin 41c. Further, the rotation range of the movable body 40 is regulated by inserting the position regulating protrusion 41b into the holding opening 45a.

A pair of long holes 31 are formed in the flange 13, and a fixing screw 32 is inserted through each long hole 31. A mounting bracket 30 is inserted into the intermediate portion of the fixing screw 32, and a nut 33, which is prevented from rotating with respect to the mounting bracket 30, is screwed into an end of the fixing screw 32. The base end of the mounting bracket 30 is pivotally attached to the upper part of the cover 11 so that the front end can change the distance from the flange 13. Further, a return spring 34 is connected to the mounting bracket 30, and the distal end portion is urged in a direction away from the flange 13. Further, the flange 13 is formed with a fixing hole 19 through which a box screw to be screwed into an embedded box such as a switch box for wiring equipment can be inserted. Also,
On the lower surface of the flange 13, an operation section 6a of an operation mode changeover switch 6 composed of a slide switch and a variable resistor 7
Is exposed (see FIG. 4).

However, as shown in FIG.
Holes 36 perforated in a mounting panel 35 such as a ceiling panel
When mounting the mounting bracket 30, the fixing screw 32 is loosened, and the distal end of the mounting bracket 30 is separated from the flange 13 by the spring force of the return spring 34 (that is, the distance between the distal ends of the mounting bracket 30 is reduced). In this state, the mounting hole 3
6, the cover 11 and the fixing screw 32 are inserted, and the flange 13 is brought into contact with the surface of the mounting panel. Next, when the fixing screw 32 is tightened, the front end of the mounting bracket 30 comes closer to the flange 13, and the peripheral portion of the mounting hole 36 can be sandwiched between the flange 13 and the mounting bracket 30. . The case 1 is attached to the mounting panel 35 as described above.
After that, the decorative plate 25 is attached so as to cover the lower surface of the flange 13. The decorative plate 25 is coupled to the base 12 by engaging an engaging claw 13 a protruding from a peripheral portion of the flange 13 with an engaging groove 25 a formed on the peripheral portion of the decorative plate 25. By inserting the tip of the driver or the like into 25a, the driver can be separated from the base 12. Makeup plate 25 to base 12
In this state, the operation portion 6a of the operation mode changeover switch 6 and the operation portion 7a of the variable resistor 7 are hidden by the decorative plate 25.

As shown in FIG. 14, a pair of shaft projections 30a project from the base end of the mounting bracket 30 on both sides.
4 is held by a pair of bearings 37a, 37b provided on the side of the fourth bearing. Each of the bearings 37a and 37b has a bearing hole 38 into which the shaft projection 30a is inserted. One bearing 37b
Has an insertion gap 22 between itself and the side surface of the terminal block 14, and an engagement leg 23 projecting from the lower end edge of the terminal cover 20 is inserted into the insertion gap 22. A notch 38 a communicating with the bearing hole 38 is formed at a lower end of a portion of the bearing portion 37 b facing the insertion gap 22. The notch 38a is formed to have a size that allows the shaft projection 30a to pass through, and when the terminal cover 20 is not mounted on the terminal block 14,
The shaft projection 30a can be introduced into the bearing hole 38 through the notch 38a. On the side surface of the terminal block 14, a guide groove 14 a that engages with the engaging leg 23 is formed at a portion corresponding to the engaging leg 23. Engagement leg piece 23
The holding claw 23a engageable with the notch 38a
Are notched when the terminal cover 20 is attached.
8a is closed, and the pressing claw 23a prevents rattling of the shaft projection 30a.

By adopting the above-mentioned structure at the pivotal portion of the mounting bracket 30, when connecting the mounting bracket 30 to the case 1, one of the shaft projections 30a is connected to the bearing portion 37a with the terminal cover 20 removed. Can be inserted into the bearing hole 38 of the bearing portion 37b through the notch 38a, and then the terminal cover 20 can be attached to the terminal block 14. , Engaging leg piece 23
The notch 38a is closed by the
3a is inserted into the notch 38a, so that the shaft projection 3
Oa is prevented from falling off. If the user forgets to attach the terminal cover 20, the position of the shaft projection 30 a shifts and the mounting bracket 30 comes off when tightening the fixing screw 32. This allows the terminal cover 20
Can be prevented from being forgotten. On the other hand, when the mounting box is mounted in the ceiling, it is not necessary to attach the terminal cover 20. At this time, the terminal cover 20 and the mounting bracket 30 are removed, and the terminal cover 20 is removed through the fixing hole 19 provided in the flange 13. The box screw may be screwed into the embedding box. Since the terminal cover 20 and the mounting sensation 30 can be easily removed as described above, it can be easily constructed by either construction method.

(Embodiment 2) In this embodiment, as shown in FIG. 18, an illuminance sensor 9 made of CdS or the like for detecting ambient illuminance is added. The output of the sensor 2 is invalidated so that the on / off state of the switch element 4 is not reversed even when the hot-wire sensor 2 detects a hot wire. The threshold of the illuminance can be switched in two stages by the operation illuminance setting switch 10. The operation portion 10a of the operation illuminance setting switch 10 composed of a slide switch is exposed on the lower surface of the flange 13 as shown in FIG.

Since the automatic control state is released when the ambient illuminance is high, when the luminaire is controlled as a load, it is used when the surroundings are bright and it is not necessary to turn on the illumination. Usability is improved.

[0020]

According to the present invention, a heat ray sensor is provided in a spherical movable body, and the periphery of an exposure window provided on the base so as to expose a transmission portion of the movable body for introducing a heat ray to the heat ray sensor, and a base. The movable body is sandwiched between the fixed holding plate and the periphery of the holding opening provided in the holding plate, and a plurality of circumferential ribs arranged concentrically on the surface of the movable body facing the holding plate are projected. The holding rib is provided on the surface facing the circumferential rib on the holding plate with a projection for elastic contact with the circumferential rib. This has the effect of being provided.
As a result, there is an advantage that the direction of the movable body does not change to the extent that the movable projection is lightly touched or an external vibration acts on the movable body because the articulation projection and the circumferential rib always engage. Further, when changing the orientation of the movable body, there is an advantage that a reliable operation feeling is given because of a click feeling, which leads to an improvement in reliability. Only
The movable body is inserted into the holding opening to
Positioning projections that regulate the
The rotation range of the moving body is limited,
The articulation projection to give a feeling of occupancy is the rotation range of the movable body.
Separate from the holding opening to insert the position regulating protrusion
Is provided for restricting the rotation range of the movable
Can be designed separately to give a sense of
It has the advantage of being easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing the entire configuration of an embodiment.

FIG. 2 is a front view of the embodiment.

FIG. 3 is a side view of the embodiment.

FIG. 4 is a bottom view of the first embodiment with a cover removed.

FIG. 5 is a partially cutaway plan view of the embodiment.

FIG. 6 is a perspective view of the embodiment.

FIG. 7 is an exploded perspective view of the embodiment.

FIG. 8 is a partially cutaway side view of the movable body used in the embodiment.

9A and 9B show a movable body main body constituting a movable body used in the embodiment, wherein FIG. 9A is a partially cutaway side view, FIG.
(C) is a sectional view, and (d) is a rear view.

FIGS. 10A and 10B show a light receiving lens constituting a movable body used in an example, where FIG. 10A is a front view, FIG.
(C) is a partially cutaway bottom view.

11A and 11B show a movable frame constituting a movable body used in the embodiment, where FIG. 11A is a front view, FIG. 11B is a partially cutaway side view, and FIG.
Is a partially cutaway bottom view.

FIG. 12 is a cross-sectional view of the embodiment with a cover removed.

FIGS. 13A and 13B show a holding plate used in the embodiment, in which FIG. 13A is a front view, FIG. 13B is a side view, and FIG. 13C is a bottom view.

FIG. 14 is an exploded perspective view of a main part of the embodiment.

FIG. 15 is an exploded perspective view showing a mounting method according to the embodiment.

FIG. 16 is a block diagram of the first embodiment.

FIG. 17 is a bottom view of the second embodiment with a cover removed.

FIG. 18 is a block diagram of a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Heat ray sensor 3 Control part 4 Switch element 11 Cover 12 Base 13 Flange 16 Exposure window 40 Movable body 41 Movable body main body 41d Circular rib 42 Light receiving lens 45 Holder plate 45a Holding opening 45d Negative projection

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01S 3/78-3/789 G01V 8/00-9/02

Claims (2)

(57) [Claims] A base attached to a mounting surface such as a ceiling;
A heat ray sensor for detecting heat rays radiated from the human body, a switch element that is turned on and off based on the output of the heat ray sensor, and a heat ray transmitted through a part that houses the heat ray sensor and faces a detection surface of the heat ray sensor. A spherical movable body rotatably attached to the base such that the transmission portion is exposed to the surface side of the mounting surface through an exposure window perforated at the center of the base and has a transmission portion, and faces the exposure window. A holding plate having a holding opening and fixed to the base so as to sandwich the movable body between the periphery of the exposure window and the periphery of the holding opening,
A plurality of circumferential ribs arranged concentrically are protrudingly provided on the surface of the movable body facing the holding plate, and a projection for articulation that elastically contacts the circumferential rib is provided on the surface of the holding plate facing the circumferential rib.
It is provided separately from the holding opening , and the movable body is used for holding
Position regulation inserted into the opening to regulate the range of rotation of the movable body
A hot wire type automatic switch characterized by having projections protruding therefrom. 2. The hot-wire automatic switch according to claim 1, wherein a plurality of articulation projections are arranged along the periphery of the holding opening.