JP3363174B2 - Hot wire automatic switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot wire type automatic switch for automatically controlling a load on / off by detecting a hot wire radiated from a human body. is there. 2. Description of the Related Art Generally, a hot-wire type automatic switch of this type is mainly used for automatically turning on a lighting load while a person is in a room. As shown in FIG. 4, the presence or absence of a person is detected by a hot-wire sensor 1 composed of a pyroelectric infrared sensor that detects a hot ray radiated from a human body. When a heat ray is detected by the heat ray sensor 1, the control circuit 2 generates a control signal, and in response to the control signal, turns on / off a switch element such as a relay (provided here in the power supply control unit 2c of the control circuit 2). The off state is set. Therefore, if the switch element is inserted in the power supply path of the lighting load, the lighting load can be turned on / off according to the presence or absence of a person. The control circuit 2 includes a signal processing section 2a, a timer section 2b, and a power control section 2c, and is supplied with power from a stabilized power supply circuit section 4 for rectifying and stabilizing a commercial AC power supply AC. The signal processing unit 2 a performs amplification and waveform shaping of the output signal of the heat ray sensor 1, and selects whether to enable or disable the output of the heat ray sensor 1 according to the ambient illuminance detected by the illuminance sensor 5. . That is, when the surrounding illuminance is high and it is not necessary to turn on the illumination load, the switch element provided in the power supply control unit 2c is kept off even when the presence of a person is detected. The timer unit 2b outputs a control signal until a predetermined time elapses from the time when the heat ray from the human body is detected by the heat ray sensor 1, and controls a switch element provided in the power supply control unit 2c. The commercial AC power supply AC is connected to power supply terminals Ta and Tb, and the load L is connected to load terminals Tc and Td. The switch element is inserted between one power supply terminal Ta and one load terminal Td, and the other power supply terminal Td.
b and the load terminal Tc are commonly connected. By the way, when this type of hot-wire type automatic switch is mounted on a wall or the like and used, if a member (switch box or mounting frame) for wiring equipment can be diverted, the member for construction is newly added. Since there is no need to design and the contractor does not need to acquire a new construction technique, it is considered that the increase in the cost required for the construction is suppressed and the spread becomes easy. From such a viewpoint, it is proposed that the hot-wire sensor 1, the control circuit 2, the switch element, and the like be housed in a case that can be attached to a mounting frame standardized for embedded wiring equipment according to JIS standards or the like. Have been.
As the attachment frame, a large-sized three-piece unit capable of attaching a maximum of three unit-sized wiring devices is generally used. Therefore, it is conceivable to use a case having a size equivalent to three wiring units of unit size. However, if a case having a size corresponding to three wiring units of unit size is used, a hot-wire type automatic switch can be mounted on a mounting frame for three large squares. By simply attaching one case, other wiring devices cannot be attached. In other words, if wiring devices such as switches and outlets are to be installed side by side, a separate mounting frame will be required, leading to an increase in construction costs,
Further, there is a problem that the mounting space becomes large. An object of the present invention is to solve the above-mentioned problems. When the present invention is used in place of an existing wall switch or the like,
An object of the present invention is to provide a hot-wire automatic switch that can be collectively mounted on the same mounting frame as another wiring device. According to the first aspect of the present invention, in order to achieve the above object, a heat ray sensor for detecting a heat ray radiated from a human body, and a control when a heat ray is detected by the heat ray sensor. A control circuit that outputs a signal, and a switch element whose on / off state is set by the control signal are provided in the case, and the case houses a hot-wire sensor and has a spherical portion including a lens unit that converges the hot-wire to the hot-wire sensor. A movable body and a case body that holds the movable body so that a lens portion is exposed from a circular exposure window formed on a front surface, and has a unit size of a standardized embedded wiring device, and is used for a wiring device. A mounting plate that can be attached to the mounting frame, a holding plate having a circular holding hole in the center is disposed in the case body facing the opening surface of the exposure window, and the movable body and the periphery of the exposure window are provided. With the periphery of the holding hole A number of dowels rotatably sandwiched between the movable members and abutting on the stairs provided concentrically with the movable member to move the movable member are protrudingly provided around the holding holes in the holding plate. According to the structure of the first aspect, the case is formed in a unit size of a standardized embedded wiring device, and the case is formed on a mounting frame for the wiring device. By having a mounting part that can be attached, it is possible to construct with the same construction members and construction procedures as general wiring equipment, and new construction members can be designed and construction contractors can use new construction techniques. It is not necessary to obtain the required size. In addition to suppressing the increase in the construction cost and leading to widespread use, up to three cases can be mounted on the mounting frame for three large squares such as JIS standard. from the hot wire type automatic switch, there is made possible to be attached to one of the mounting frame with wiring devices of other units dimensions such as switches and outlets, increase of the construction cost by adding a mounting frame , It is possible to prevent an increase in installation space. Further, by providing a movable body rotatable with respect to the case main body and storing the heat ray sensor in the movable body, if the movable body is rotated with respect to the case main body, the hot wire is mounted on a wall or the like. This makes it possible to change the detection area of the sensor. Also, by holding the spherical movable body between the peripheral portion of the circular exposure window formed in the case body and the peripheral portion of the circular holding hole formed in the holding plate disposed in the case body, The movable body can be rotated in an arbitrary direction, and the degree of freedom of the setting range of the detection area is increased. In other words, it is possible to freely set the detection area according to the construction location, and it is possible to detect a person other than a person or reduce the chance of a malfunction such as not detecting even if a person is present. is there. In addition, the movable body is rotatably held between the periphery of the exposure window and the periphery of the holding hole, and a large number of dowels that abut the stepped portion provided concentrically with the movable body to moderate the movable body are held down. Since the projection is provided around the holding hole in the plate, it is possible to prevent the set detection area from being inadvertently changed when the dowel contacts the staircase. As shown in FIG. 1, a case A includes a case body 10 formed by combining a body 11 which is a synthetic resin molded product and a cover 21, and a case body 10 is rotated with respect to the case body 10. The movable body 30 is freely held. The body 11 has an open front surface (the upper surface in FIG. 1), and flange pieces 12 project from both side edges of the opening. An engagement hole 13 is formed in the flange piece 12. On the other hand, the cover 12 has engaging legs 22 protruding from both sides of the rear surface, and the engaging legs 22 are engaged with the engaging holes 1.
3, the body 11 and the cover 21 are integrally connected by engaging with the periphery of the engagement hole 13. Case A has the same dimensions (unit dimensions and names) as embedded type wiring devices that can be mounted on up to three large-sized rectangular mounting frames standardized by the JIS standard or the Japan Wiring Equipment Manufacturers Association. Formed). Therefore, up to three cases A can be mounted on the mounting frame for three large squares. The cover 21 has a projecting base 23 projecting from the center of the front surface, and a circular exposure window 24 is formed in the center of the front surface of the projecting base 23. Also, the cover 21 has a mounting hole 2 with which a holding claw of a metal mounting frame is engaged as a mounting portion to the mounting frame.
5 are formed on both side surfaces of the base of the protruding base 23, and a pair of mounting claws 26 which engage with holding holes of the synthetic resin mounting frame are provided on both side edges so as to protrude. A partition wall 1 is provided at the rear of the internal space of the body 11.
4 form a terminal storage chamber 15 partitioned. In addition, a circuit board 41 on which circuit components other than the heat ray sensor 1 in the circuit portion shown in FIG. 4 are mounted is provided in contact with the front surface of the partition wall 14. On the circuit board 41, four terminal boards 61 each having a substantially U-shaped cross section and forming terminals Ta to Td are mounted. Each terminal plate 61 is housed in the terminal housing chamber 15 and forms a quick connection terminal together with the lock spring 62 and the release button 63. The locking spring 62 is formed by bending both ends of a strip of a spring material. The locking spring 62 is elastically contacted with a locking piece 62a inclined so as to approach the terminal plate 61 in the insertion direction of the electric wire. And a contact piece 62b.
Wire insertion opening (not shown) formed on the rear surface of body 11
The inserted wire is a lock piece 62a and a contact piece 62.
b and the terminal plate 61, the leading edge of the locking piece 62 a bites into the electric wire to prevent the electric wire from coming off. Further, the release button 63 is pushed by a tip end of a driver inserted into the body 11 through a button operation hole (not shown) formed on the rear surface of the body 11, and thereby the lock piece 62 a is moved from the terminal plate 61. It is pressed in the direction in which it is released, and the locked state of the locking piece 62a with respect to the electric wire is released, so that the electric wire can be easily pulled out. The hot-wire sensor 1 is mounted on a circuit board 42 housed in a movable body 30 formed in a spherical shape. The movable body 30 has a hemispherical lens body 31, a lens part 32 made of a hemispherical Fresnel lens, and a ring-shaped body that is connected to the lens body 31 and holds the periphery of the lens part 32 between the lens body 31. And a holding frame 33. The circuit board 42 is mounted on the lens body 3 using the screw 34.
Fixed to 1. The holding frame 33 has a pair of connecting legs 35, and the connecting legs 35 are engaged with the connecting holes 36 formed on the peripheral surface of the lens body 31, so that the lens body 3
1 The lens portion 32 is formed using a material such as high-density polyethylene and has a large number of optical axes so that heat rays can be easily transmitted. The reason why many optical axes are provided is that the pyroelectric infrared sensor used as the heat ray sensor 1 is a differential type sensor which can obtain an output only when a heat ray changes. That is, the sensitivity distribution in the field of view of the hot-wire sensor 1 is changed by using the lens unit 32 having a large number of optical axes, so that a person present in the field of view of the hot-wire sensor 1 moves a hand or the like to a small degree. By making it possible to detect even movement, the output from the hot-wire sensor 1 is always obtained while the person is in the detection area. As shown in FIG. 2, a position regulating protrusion 37 is provided on the rear surface (the upper surface in FIG. 2) of the lens body 31, and a plurality of steps 38 are formed concentrically around the position regulating protrusion 37. Further, guide projections 39 are provided on both side surfaces of the lens body 31 so as to project in a straight line in the diameter direction. The movable body 30 causes the lens portion 32 to protrude forward through an exposure window 24 formed on the front surface of the cover 21. A guide groove 27 is formed on the inner peripheral surface of the cover 21 and runs in the front-rear direction in which the guide protrusion 39 is inserted. A cover plate 43 made of sheet metal is provided on the cover 21 so as to face the opening surface of the exposure window 24. The holding plate 43
A circular holding hole 44 is formed at the center, and the movable body 30 is held between the periphery of the exposure window 24 and the periphery of the holding hole 44. Here, the position regulating protrusion 37 is passed through the holding hole 44. Therefore, the movable body 30 is rotatable with respect to the case body 10 in a range where the guide protrusion 39 is regulated by the guide groove 27 and in a range where the position regulating protrusion 37 can move in the holding hole 44. is there. Further, a large number of dowels 45 project from the periphery of the holding hole 44 toward the movable body 30, and the dowels 45 come into contact with the stairs 38 so that a movement is imparted when the movable body 30 rotates. It has become. It is desirable that the holding plate 43 be held by forming a holding rib or the like on the inner peripheral surface of the cover 21. By doing so, the distance from the opening surface of the exposure window 24 is kept constant, and the holding force of the movable body 30 is stabilized. Further, the holding plate 43 is brought into contact with the circuit board 41 built in the body 11 so that the holding plate 43 is in contact with the circuit board 41.
Can also be fixed. As described above, the movable body 30 that is rotatable with respect to the case body 10 is provided, and the heat ray sensor 1 is housed in the movable body 30.
If it is rotated with respect to 0, the detection area of the heat ray sensor 1 can be adjusted according to the construction location. By the way, at the time of construction on a wall surface or the like, the case A is attached to a mounting frame for wiring equipment. The mounting frame 50 for three large squares, which is standardized for embedded wiring devices in the JIS standard or the Japan Wiring Appliance Manufacturers Association Standard, has a shape as shown in FIG. 3, for example. That is, the mounting frame 50 has a holding hole 53a in one side piece 52a surrounding the opening window 51 into which the mounting claw 26 projecting from the side edge of the case A is inserted, and a side piece 52b in the other side piece 52b. An operation piece 54 that bends so as to change the distance from the piece 52b is formed. A gap 53b into which the attachment claw 26 is inserted is formed between both shoulders of the operation piece 54 and the side piece 52b. When attaching the case A to the attachment frame 50, the attachment claw 2 is inserted into the holding hole 53a provided in the one side piece 52a.
6 and insert the case A from the rear of the mounting frame 50 into the mounting frame 5.
When a force is applied so as to be pressed to zero, the operation piece 54 is bent, the mounting claw 26 is inserted into the gap 53b, and the case A is fitted to the mounting frame 50. At this time, the protrusion 23 of the case A protrudes from the opening window 51 of the mounting frame 50. On the other hand, in order to remove the case A from the attachment frame 50, the operation piece 54 may be pryed with a driver or the like so as to be separated from the side piece 52b. By the way, connecting holes 55a and 55b which surround the opening window 51 and are orthogonal to the side pieces 52a and 52b are provided with a long hole 56 for inserting a box screw for connecting the mounting frame 50 to the embedding box and the front surface of the mounting frame 50. A screw hole 57 or the like into which a plate screw for attaching a covering decorative plate (not shown) is screwed is provided. This type of mounting frame 50 is well known. [0017] As described above, since it is possible to mount the case A with respect to off-the-shelf mounting frame 50 that is standardized for embedded wiring accessories, a separate attachment as construction members of the hot-wire automatic switch There is no need to design a frame or the like, and mounting can be performed using the mounting frame 50 for wiring equipment that is generally used. Further, since the case A is formed to have the unit dimensions of the standardized embedded wiring device, it can be mounted on the same mounting frame 50 as other standardized wiring devices such as switches and outlets. Therefore, it is not necessary to use a separate mounting frame for the thermal automatic switch, so that an increase in construction cost and an increase in mounting space can be prevented. In addition, since it can be constructed in the same procedure as a general wiring device, there is no need for a construction company to acquire a new construction technique, which leads to widespread use. According to the first aspect of the present invention, a case having a standardized mounting type wiring device having a unit size and having a mounting portion attachable to a mounting frame for the wiring device is used. Therefore, up to three cases can be mounted on the standardized mounting frame for three large squares. As a result, it becomes possible to attach the hot wire type automatic switch to a single mounting frame together with a wiring device of another unit size such as a switch and an outlet, thereby increasing the construction cost by adding the mounting frame and increasing the mounting cost. This has the advantage that an increase in space can be prevented. Further, a spherical movable body having a lens unit for accommodating the heat ray sensor and converging the heat ray to the heat ray sensor, and a case for holding the movable body so that the lens part is exposed from a circular exposure window formed on the front surface. A case is formed by the main body, and a holding plate having a circular holding hole in the center is arranged in the case body facing the opening surface of the exposure window, and the movable body is positioned at the periphery of the exposure window and the periphery of the holding hole. When the movable body is rotated with respect to the case main body, the detection area of the heat ray sensor can be changed in a state where the movable body is mounted on a wall surface or the like. In addition, since the spherical movable body is sandwiched between the periphery of the circular exposure window formed in the case body and the periphery of the circular holding hole formed in the holding plate arranged in the case body, the movable body is movable. This has the advantage that the body can be rotated in any direction, and the setting range of the detection area has a high degree of freedom. In addition, the movable body is rotatably held between the periphery of the exposure window and the periphery of the holding hole, and a large number of dowels that abut the stepped portion provided concentrically with the movable body to moderate the movable body are held down. Since the projection is provided around the holding hole in the plate, there is an advantage that the set detection area can be prevented from being inadvertently changed by the contact of the dowel with the step.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an embodiment. FIG. 2 is a partially cutaway side view of a movable body used in the embodiment. FIG. 3 is a perspective view of a mounting frame used in the embodiment. FIG. 4 is a block circuit diagram of the hot-wire automatic switch according to the present invention. [Description of Signs] 1 Heat ray sensor 2 Control circuit 10 Case main body 24 Exposure window 30 Movable body 32 Lens section 43 Press plate 44 Press hole 50 Mounting frame A Case

Continuation of the front page (56) References JP-A-3-194822 (JP, A) JP-A-3-194820 (JP, A) JP-A-2-61926 (JP, A) JP-A-63-120394 (JP) JP-A-3-194821 (JP, A) JP-A-3-191842 (JP, A) JP-A-2-298886 (JP, A) JP-A-3-28790 (JP, A) 3-3646 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 35/00 G01V 8/12 G08B 13/191 G01J 1/02 H05B 37/02

Claims (1)

(57) [Claims 1] A hot wire sensor for detecting a hot wire radiated from a human body, a control circuit for outputting a control signal when a hot wire is detected by the hot wire sensor, A switch element in which an OFF state is set is provided in the case, and the case includes a spherical movable body having a lens unit that houses the heat ray sensor and converges the heat ray to the heat ray sensor, and a circular exposure window formed on the front surface. A case body that holds the movable body so that the lens portion is exposed, and has a standardized embedded unit wiring unit having the unit dimensions of a wiring device and a mounting unit that can be attached to a mounting frame for the wiring device, A holding plate having a circular holding hole in the center is arranged in the case body facing the opening surface of the exposure window, and the movable body is rotatably held between the periphery of the exposure window and the periphery of the holding hole. , Stairs concentrically provided on a movable body Contact with hot wire type automatic switch characterized in that it is projected from the periphery of the holding holes in the plate presser numerous dowels for articulating the movable body.