JP2793198B2 - Human body detection switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body detection switch that includes a human body detection sensor such as a heat ray sensor and that can obtain a detection output for load control based on the output of the human body detection sensor. Things.

2. Description of the Related Art Generally, a human body detection switch of this type is used, for example, for automatically turning on and off a porch at the entrance or a corridor of an apartment house in response to a visitor. That is, the presence or absence of a visitor is detected by a heat ray or the like emitted by a person, and when there is a visitor, the lighting is turned on. In this way, usually, the lighting is automatically blinked in response to the presence or absence of a visitor.However, it is operated so that it can respond to continuous lighting as a nightlight or turn off during the daytime etc. Usually, a changeover switch for selecting a mode is provided. That is, an automatic mode in which the load is turned on / off in response to the output of the human body detection sensor provided in the human body detection switch, an off mode in which the load is always turned off, and an on mode in which the load is always turned on can be selected. is there.

[Problems to be Solved by the Invention] In the conventional human body detection switch, the changeover switch for performing the mode switching as described above is built in the same case as the human body detection sensor. There is a problem that the changeover switch must be operated in a certain place, and the operation cannot be performed from the room of the house or the management room of the apartment house. In particular, when the human body detection switches are provided at a plurality of locations, the switching operation of the switching switches is troublesome, and a configuration that enables the switching operations to be performed collectively at one location has been desired. Further, since the human body detection switch must be arranged so that the changeover switch can be operated, there is a problem that there are many restrictions on the arrangement place.

An object of the present invention is to solve the above-described problems, and a human body detection sensor is provided by separately providing a sensing unit provided with a human body detection sensor and a switch unit provided with a changeover switch. An object of the present invention is to provide a human body detection switch in which a switch unit can be operated in another place, thereby enabling a plurality of mode switching operations to be performed at one place and reducing restrictions on an arrangement place. It is.

Means for Solving the Problems In order to achieve the above object, the present invention includes a human body detection sensor such as a heat ray sensor in a case, and detects a person based on the output of the human body detection sensor to connect a load to a commercial power supply. A sensing unit that opens and closes the contacts of the relay inserted between it and a switch unit that has a changeover switch and is connected to the sensing unit via a connection line are provided separately, and the relay coil of the relay is connected in series with the semiconductor switch element. A contact is opened and closed according to a low-voltage control voltage applied to the control terminal of the connected semiconductor switch element, and the changeover switch controls the state of applying a control voltage that keeps the semiconductor switch element on and the output of the human body detection sensor. In response, a control voltage for turning on and off the semiconductor switching element is applied, and a control voltage is applied so as to keep the semiconductor switching element off. A state in which the state is not added is switched and selected.

[Operation] According to the above configuration, since the sensing unit for detecting a person and the switch unit for mode selection are provided separately, the sensing unit and the switch unit can be provided at different locations. is there. In other words, mode switching can be performed on the indoor side or in the management room,
Further, even when the human body is detected at a plurality of locations, the mode can be switched at one location. Furthermore, since the sensing unit can be arranged without being restricted by the operability of the switch unit, there are few restrictions on the location of the sensing unit, for example,
It is also possible to arrange the sensing unit in a place that is out of reach, such as the upper part of the wall. In addition, a relay contact is inserted between the load and the power supply, and the changeover switch selects and switches the control voltage to the semiconductor switch element connected in series to the relay coil of the relay. The connection line to be connected only has to correspond to a low-voltage control voltage, and wiring at a low voltage is sufficient. Therefore, there are few restrictions on wiring work, and the degree of freedom in installation work of the sensing unit and the switch unit increases.

[Example] The basic circuit structure, be as shown in FIGS. 1 and 2, the sensing unit U ₁ has a pair of terminals 50a connected to a commercial power source AC, a pair that is connected to the load L Terminal 5
0a, 3 pieces of the connecting portion 50b which is connected to the switch unit U ₂
~ 50d. The contact r of the relay Ry is inserted between the terminal 50a connected to the load L and the terminal 50a connected to the commercial power supply AC. The commercial power supply AC is rectified and smoothed by the power supply circuit 81 and stabilized by the low voltage circuit 82. The DC power thus obtained is supplied to the processing circuit IC to which the pyroelectric element P is connected. The processing circuit IC is configured by externally attaching peripheral components to an integrated circuit that is commercially available under the name of CF1651C, for example. When the infrared ray radiated from the human body is detected by the pyroelectric element P, the output terminal OUT is Output level is "H" for a certain period of time
It is configured so that This time is variable resistor VR
Can be changed by adjusting. The time adjustment range is set, for example, from about 10 seconds to about 6 minutes. Further, a light receiving element PD made of CdS is connected to the enable terminal ENA, and the operation of the processing circuit IC is set to stop when the amount of light received by the light receiving element PD increases. The output terminal OUT of the processing circuit IC is connected to the connecting portion 50d connected to the switch unit U _2. The connection part 50b is connected to the relay control circuit 83, and the connection part 50c is a processing circuit IC.
And the positive terminal of the constant voltage circuit 82 together with the power supply terminal _VDD . The relay control circuit 83 is a circuit in which a series circuit of a switching element Q composed of a transistor, a relay coil Co and a display element LD composed of a light emitting diode is connected to a power supply circuit 81, and the control terminal of the switching element Q is set to “H”. While the relay
The contact r of Ry is closed, and the display element LD is turned on. When the control terminal of the switch element Q becomes “L”, the contact r of the relay Ry opens, and the display element LD goes out.

On the other hand, the switch unit U ₂ is provided with a changeover switch SW for switching the 3-pole, three and a terminal 55B～55d. The common contact of the changeover switch SW is connected to the terminal 55b via the light emitting diode D. Two of the three-pole switching contacts are separately connected to terminals 55c and 55d, respectively. Nothing is connected to the remaining one of the three-pole switching contacts.
Each terminal 55b~55d of the switch unit U ₂ are respectively connected to the corresponding connecting portions 50b~50d of the sensing unit U _1, by switching the changeover switch SW, the control terminals of the relay control circuit 83 "H", Three states can be selected: a state set to any of "L" and a state connected to the output terminal OUT of the processing circuit IC. Accordingly, if the control terminal of the relay control circuit 83 is manually set to either “H” or “L” by operating the changeover switch SW, the contact r is turned on or off in accordance with that. Become. Further, if a state in which the control terminal of the relay control circuit 83 is connected to the output terminal OUT of the processing circuit IC is selected, when a person is detected by the pyroelectric element P, the contact r can be turned on for a certain period of time. You can. Here, the light emitting diode D is connected to the switch element Q
Are turned on when the switch element Q is turned on because the control terminal is connected in the forward direction when the control terminal is set to “H”. That is, when the load L is turned on, the light emitting diode D is turned on, so that the energization display can be performed. In addition, since the energization display uses the control voltage applied to the switch element Q, the configuration is extremely simple. When it is unnecessary or in or always off always on the load L, it is sufficient to connect the connecting portion 50b of the sensing unit U _1, and 50d in jumper wire or the like. In this state, the load L is turned on / off in response to the output of the pyroelectric element P.

Meanwhile, the sensing unit U ₁ is configured as shown in Figure 3 to Figure 5. The case 1 is formed by combining a body 10 made of a synthetic resin molded product and a cover 20 and has a size corresponding to three large square modules of wiring equipment specified in JIS standard. The mounting portion is formed so that it can be attached to a metal mounting frame or a synthetic resin mounting frame specified by the industry association standard. These mounting frames are adapted to be mounted on an embedded box such as a switch box. The mounting portions are formed on both side surfaces of the cover 20, respectively.For the metal mounting frame, protrusions of the metal mounting frame are provided in a pair of locking holes 21 formed on the left and right side surfaces of the cover 20, respectively. The cover is formed by inserting four locking claws 22 protruding from both sides of the cover 20 on the synthetic resin mounting frame. Bonded by inserting into the hole. One hook 23 projects from each of the left and right edges and the rear edge of the lower surface of the cover 20, and the hook 23 fits into a fitting hole 11 formed in the peripheral wall of the body 10 from the inside of the peripheral wall of the body 10. Then, the body 10 and the cover 20 are joined.

The inside of the body 10 is separated by a partition rib 12 into a circuit storage chamber 13 and a pair of terminal storage chambers 14, and a pair of holding ribs 15 project from the inner peripheral surfaces of the left and right side walls of the circuit storage chamber 13. The left and right ends of the rotating frame support plate 16 are held in grooves between the holding ribs 15. The rotating frame support plate 16 is formed in a substantially T-shape in which the left and right middle portions protrude upward, and a step 16b is formed on a side edge of the vertical piece. A turning frame support rib 17 is formed on the inner peripheral portion of the rear wall of the body 10 so as to face the turning frame support plate 16. The upper surfaces of the rotation frame support plate 16 and the rotation frame support rib 17 are arc-shaped rotation surfaces 16a and 17a, each having a concave central portion.
The rotation frame 30 is rotatably supported between the upper surfaces of the rotation frame support plate 16 and the rotation frame support rib 17. Body 10
Inside, a first printed circuit board 40 on which a power supply circuit unit is mounted is mounted. The printed circuit board 40 has cutouts 41a and 41b that expose the rotation surface 16a of the rotation frame support plate 16 and the rotation surface 17a of the rotation frame support rib 17, respectively. The printed board 40 is placed on the partition ribs 12, the step 16b of the rotating frame support plate 16, and the like, and a space is formed between the inner bottom surface of the body 10 and the printed board 40, The circuit components mounted on the printed board 40 are housed in this space. In particular, the main circuit components on the printed circuit board 40 will be placed in the portion corresponding to the circuit section storage chamber 13. Here, the printed circuit board 40 includes a power supply circuit 81,
The constant voltage circuit 82, the relay control circuit 83, the switch SW, and the light receiving element PD are mounted. A boss 18 protrudes from the inner bottom surface of the body 10 in the circuit section storage chamber 13, and a second printed circuit board 42 is held by a fixing screw 19 screwed to the boss 18. A fixing notch 43 into which the fixing screw 19 is inserted is formed on the periphery of the printed board 42, and a variable resistor VR having a slidable handle 72 and a capacitor C are mounted on the printed board 42. A cutout portion 41c from which the handle 72 of the variable resistor VR protrudes is formed on the periphery of the first printed circuit board 40.

The terminals 50a are housed in the terminal storage chamber 14. Terminal 50a is
Terminal plate 51 and locking spring having spring force directed toward terminal plate 51
52 and a release button 53 capable of pressing the locking spring 52 against the spring force.
And has a well-known structure as a connection terminal. 1
One terminal storage chamber 14 has a pair of terminal plates 51 and a pair of locking springs.
52, and the release button 53 is disposed so as to be shared by both the lock springs 52. A telephone insertion hole (not shown) is formed in the bottom wall of the body 10 in correspondence with each locking spring 52, and a part of the release button 53 is exposed to lock by a jig such as a driver. The release button 53 can be pressed against the spring force of the lock spring 52. Here, the terminal 50a is configured so that a single copper wire of diameter 1.6 or 2.0 for general house wiring can be connected. At one place of the terminal board 51, a connection piece 54 is provided so as to protrude upward, and this connection piece 54 is fixed to the printed board 40 by soldering, so that the terminal 50a and the circuit section on the printed board 40 are electrically connected. Connected.

The rotating frame 30 is formed in a frame shape in which a pair of rotating plates 31a and 31b formed in a disk shape and separated from each other and opposed to each other are connected by a pair of side frames 32 parallel to each other. A third printed circuit board 44 on which the element P and the processing circuit IC are mounted is mounted. The rotating plates 31a, 31b are connected to the rotating surfaces 17a, 1
By being placed on 6a, the rotating frame 30 can rotate with respect to the body 10. Printed circuit board 44
A fixing notch 45 is formed on one side, and a fixing protruding piece 46 protrudes from one side opposite to this one side. A boss 33 corresponding to the fixing notch 31a is formed on one rotating plate 31a of the rotating frame 30 along the inner side surface, and the other rotating plate 31
The support hole 34 into which the fixing projection 46 is fitted is formed in b.
Therefore, the printed board 44 is fixed to the rotating frame 30 by fitting the fixing projection 46 into the support hole 34 and screwing the fixing screw 35 formed of a tapping screw to the boss 33 through the fixing notch 45. It is done. A handle 36 that is operated to adjust the angle of the rotating frame 30 with respect to the body 10 is provided on the peripheral surface of the rotating plate 31a so as to protrude therefrom. Also, both rotating plates 31
Stoppers 37a and 37b that protrude from the outer surfaces of the a and 31b, respectively, restrict the rotation range of the rotation frame 30 by abutting against the inner peripheral surface of the cover 20.

The above-described printed circuit boards 40, 42, and 44 are connected to each other via jumper wires 47. A jumper line 47 connecting the first printed circuit board 40 and the second printed circuit board 42 in the body 10 and the third printed circuit board 44 in the rotating frame 30 is formed in a notch 41a formed in the printed circuit board 40. It is designed to be inserted. Further, the jumper wire 47 connecting the printed board 44 in the rotating frame 30 and the other printed boards 40 and 42 is connected to the rotating frame 30 so as not to be disconnected when the rotating frame 30 is rotated.
Is set to have a margin greater than the rotatable length of. An insulating sheet 48 is provided on the upper surface of the printed board 40 so as not to short-circuit with the circuit section of the printed board 44. The first printed circuit board 40, connection 58 as a connection portion 50b~50d for connecting to the switch unit U ₂ is connected, the connecting line 58 is drawn out through the lead hole 49 formed in the body 20 It is.

By the way, the pyroelectric element P mounted on the printed circuit board 44
Are arranged between the two side frames 32 such that the upper surface side in FIG. 3 becomes a detection surface, and in front of the detection surface of the pyroelectric element P,
A lens plate 60 for setting a detection area is provided. The lens plate 60 is a flat Fresnel lens formed of a material that transmits far infrared rays such as high-density polyethylene, and is formed in a rectangular shape, and a pair of engaging hooks 61 is provided on each side edge. . The lens plate 60 includes rotating plates 31a and 31 of the rotating frame 30.
The lens plate 6 on the support rib 39 formed along the periphery of b
The peripheral portion of the rotating frame 30 is placed, and the engaging hook 61 is engaged with the engaging concave portion 38 formed at the lower portion of the inner peripheral surface of the both side frames 32 of the rotating frame 30, thereby forming a curved shape. With rotating frame 30
Is to be held. The lens plate 60 is composed of a plurality of regions so as to form a desired detection area.
It goes without saying that the focal point for each area is set on the detection surface of the pyroelectric element P.

On the upper surface of the cover 20, a pair of rotating frame holding plates 24a, 24b that respectively hold the rotating plates 31a, 31b of the rotating frame 30 are protruded. Each of the rotating frame holding plates 24a and 24b has a peripheral wall, and the rotating plates 31a and 31b rotate along the inner peripheral surface of the peripheral wall. That is, the rotating plates 31a, 31b are sandwiched between the inner peripheral surfaces of the peripheral walls of the rotating frame holding plates 24a, 24b and the rotating surfaces 16a, 17a of the rotating frame support plate 16 and the rotating frame holding ribs 17. That is, it turns in the form of a circle. As described above, the rotation range of the rotation frame 30 is the stopper 37a,
37b is regulated by contacting the inner peripheral surface of the cover 20, and the range is set to approximately 40 ° on the left and right. The detection area with the rotating frame 30 fixed is approximately 90
The detection area can be adjusted within a range of 170 degrees by rotating the rotation frame 30. On the front surface of the cover 20, a light receiving hole 26 for exposing the light receiving element PD and a display hole 27 for exposing the display element LD formed of a light emitting diode are formed in portions different from the rotation frame holding plates 24a and 24b. A nameplate 28 is provided at a portion straddling the light receiving hole 26 and the display hole 27. Here, the nameplate 28 has light transmitting portions 28b and 28c at portions corresponding to the light receiving hole 26 and the display hole 27, respectively. A handle exposure hole 29 through which a handle 72 of the variable resistor VR is exposed is provided at the center of one side of the cover 20.
Is formed. For this part, attach Case 1 to the mounting frame
When the flash plate of the JIS standard is disposed on the front side of the case 1, it is a portion covered by the flash plate, so that a person other than the installer does not accidentally touch the handle 72.

A lens cover 64 made of a synthetic resin molded product that is transparent to far-infrared rays is mounted between the rotating frame holding plates 24a and 24b on the cover 20. The lens cover 64 is formed in a semi-cylindrical shape, and a pair of locking pieces 65 project from both side edges thereof. As shown in FIG. 5, the locking piece 65
The lens cover 64 is fixed to the cover 20 by being locked to the inner peripheral surface of the lens. The lens cover 64 is attached to the lens plate 60
It is arranged so as to be substantially in close contact with the outer surface of the. Lens cover 62
Can be formed of a material that is opaque to visible light, since the lens cover 62 covers the rotating frame 30.
The circuit portion in the rotating frame 30 is not seen from the outside, and the user can be prevented from feeling psychologically uneasy.

On the other hand, the switch unit U _2, as shown in FIGS. 6 and 7, a switch case 90 formed by combining a body 91 and a cover 92, the switch case 90
Are formed in a size corresponding to one standardized large square module. The body 91 and the cover 92 are joined by engaging a hook 94 formed on the cover 92 with an engagement hole 93 formed on the body 91. On both sides of the cover 92, a mounting hole 95 that can be mounted on a standardized metal mounting frame and mounting claws 96 that can be mounted on a standardized synthetic resin mounting frame are formed. Have been. A printed circuit board 97 on which a changeover switch SW composed of a slide switch is mounted is housed in the body 91, and terminals 55b to 55d are mounted on the printed circuit board 97 on the side opposite to the changeover switch SW. Each of the terminals 55b to 55d is a threaded terminal including the terminal plate 56 and the terminal screw 57, and is exposed on the back surface of the body 91. On the other hand, the knob 98 is attached to the changeover switch SW, and the changeover switch SW
Operation is made easy. This knob 98
Is exposed on the front surface of the cover 92 through an insertion hole 99 projecting from the cover 92. The light emitting diode D is also mounted on the printed circuit board 97. The light emitting diode D is exposed to the outside through a display window 100 formed on the front surface of the cover 92. However, when the contact r of the relay Ry is turned on, the control terminal of the switch element Q is at "H".
Is turned on.

According to the above configuration, as shown in FIG.
By connecting the sensing unit U ₁ and the switch unit U ₂ through, it is possible to place the sensing unit U ₁ and the switch unit U ₂ in separate locations.

[Effect of the Invention] As described above, the present invention includes a human body detection sensor such as a heat ray sensor in a case, and detects a person based on the output of the human body detection sensor. A sensing unit that opens and closes a relay contact and a switch unit that is connected to a sensing unit having a changeover switch via a connection line are separately provided, and a relay coil of the relay is connected in series with a semiconductor switch element and a semiconductor switch. The contact is opened and closed according to a low-voltage control voltage applied to a control terminal of the element, and the changeover switch responds to a state of applying a control voltage for keeping the semiconductor switch element on and an output of the human body detection sensor. A state in which a control voltage for turning on and off the semiconductor switch element is applied,
Since the state where the control voltage is not applied is switched and selected so as to keep the semiconductor switch element off, the sensing unit and the switch unit can be provided in different places. That is, there is an advantage that the mode switching can be performed at the room side or the management room, and even when the human body detection is performed at a plurality of locations, the mode switching can be performed at one location. Further, since the sensing unit can be arranged without being restricted by the operability of the switch unit, there are few restrictions on the arrangement place of the sensing unit, and for example, the sensing unit is arranged in an inaccessible place such as an upper part of a wall surface. It also has the advantage that it becomes possible. In addition, the contact point of the relay is inserted between the load and the power supply, and the changeover switch selects the low-voltage control voltage applied to the control terminal of the semiconductor switch element connected in series to the relay coil of the relay. The connection between the unit and the switch unit may be made with a connection line corresponding to a low-voltage control voltage, and low-voltage wiring is sufficient. There is an advantage that is high.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is an overall configuration diagram showing a connection state of the above, FIG. 3 is an exploded perspective view showing a sensing unit used in the above, and FIG. FIG. 5 is a longitudinal sectional view of the sensing unit, FIG. 5 is a transverse sectional view of the sensing unit used in the above embodiment, FIG. 6 is an exploded perspective view of the switch unit used in the embodiment, and FIG. 7 is a sectional view of the switch unit used in the embodiment. 1 ... case, P ... pyroelectric element, SW ... changeover switch,
U ₁ …… Sensing unit, U ₂ …… Switch unit.

Claims (1)

(57) [Claims] 1. A sensing unit having a human body detection sensor such as a heat ray sensor in a case and opening and closing a contact of a relay inserted between a load and a commercial power supply when a human is detected based on an output of the human body detection sensor. And a switch unit that includes a changeover switch and is connected to the sensing unit via a connection line. The relay coil of the relay is connected in series with the semiconductor switch element and is connected to a control terminal of the semiconductor switch element. The contact is opened and closed according to a control voltage, and the changeover switch is in a state of applying a control voltage for keeping the semiconductor switch element on, and a control voltage for turning on and off the semiconductor switch element in response to the output of the human body detection sensor. And a state in which the control voltage is not applied so as to keep the semiconductor switch element off. The human body detection switch to butterflies.