JPH0455791A - Heat sensitive automatic switch - Google Patents

Abstract

PURPOSE:To make response to various kinds easy by attaching and uniting a sensor body on a holder freely movable. CONSTITUTION:A spherical sensor is formed with a sensor body 30 and a lens 31; a holder is formed by coupling a semi-spherical sensor holder 35 and a holder ring 36; and a sensor block 3 is formed by holding the sensor with the holder freely movable. A body block 1 is formed by containing a multitude of terminals, a circuit base plate 12, and an insulator plate 13 in a body 10, and a cover block 2 is formed by holding the sensor block 3 with a cover 20. On the sensor body 30, the circuit base plate 32 is fixed. On the base plate 32, syro-electric element TP and the like detecting heat ray radiated from a human body is fixed and blocks 1 and 2 are coupled so as to embed in the wall with using a mounting frame 4. With this united configuration, a specification change can be managed by changing the shape of the cover 20 to attach the sensor block 3 and thus easy response to various kind is attained.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an automatic heat-sensitive switch that turns on and off by detecting heat rays emitted from a human body.

[Conventional technology]

Conventionally, as shown in FIG. 14, this heat-sensitive automatic switch for rice has been equipped with a pyroelectric element TP that detects heat rays emitted from the human body, and a lens 31 is placed in front of the detection surface of the pyroelectric element TP. The provided cylindrical sensor body 38 is connected to the lens 31
A case is provided that is attached to the case 6 so that it is exposed at the front.

[Problem to be solved by the invention]

In the heat-sensitive automatic switch having the above configuration, the two-sensor main body 38 is rotatably held relative to the case 6, so the mechanism for rotating the sensor main body 38 is attached to the case 6 (IN
Therefore, if the specifications of the case 6 are changed, there is a problem in that a major design change including the mechanism for rotating the sensor body 38 is required. The present invention aims to solve the above problems, and by attaching the sensor body to a holder in a rotatable manner to form a sensor block, only the outer shape of the case etc. can be changed in design even when specifications are changed. The present invention aims to provide a heat-sensitive automatic switch that can easily be applied to a wide variety of products.

[Means to solve the problem]

In order to achieve the above object, the configuration of claim 1 includes a sensor block in which a pyroelectric element for detecting heat rays emitted from a human body is installed and a lens is provided in front of a detection surface of the pyroelectric element; A cover that holds the sensor block is provided, and the sensor block is formed by a spherical sensor body in which two pyroelectric elements are housed, and a holder that rotatably holds the sensor body. In the structure of claim 2, the holder is provided with a pusher urged toward the sensor body by a return spring, and the sensor body has a plurality of positioning elements that engage with the tip of the pusher when rotating relative to the holder. It forms a recess.

[Operation] According to the structure of claim 1, since the sensor body is attached to the holder so as to be rotatable to form the sensor block, the sensor body can be integrated into a unit including the function of rotating the sensor body. Therefore, even when changing the specifications, it is sufficient to change the shape of the outer shell to which the sensor block is attached, making it easy to adapt to a wide variety of products. According to the structure of claim 2, the sensor body is provided with a plurality of positioning recesses, and the holder is provided with a presser that engages with the positioning recesses when the sensor body is rotated, so that the sensor body can be articulated. This makes it possible to position the sensor body with good reproducibility.

【Example】

As shown in FIGS. 1 and 2, it is basically constructed by combining a body block 1 and a cover block 2. As shown in FIG. 3, the body block 1 has a front surface (third
A circuit board 12 on which a plurality of terminals 11 and a signal processing circuit and a power supply circuit for processing signals from a sensor block 3 (to be described later) are mounted in a body 10 having an open top (in the figure),
It is formed by mounting an insulating plate 13 that covers the front surface of a circuit board 12. Each terminal 11 includes a terminal plate 14 and a locking spring 15 having a spring force in a direction approaching the terminal plate 14.
As shown in FIG. 3, a well-known connection terminal is formed in which a wire inserted through a wire insertion hole 16 bored in the rear surface of the body 10 is held between a terminal plate 14 and a locking spring 15. Further, a release button 17 is disposed at a portion corresponding to the locking spring 15, and a jig insertion port 1 bored in the rear surface of the body 10.
If you insert a screwdriver etc. from 8 and operate the release button 17,
The locking spring 15 is bent away from the terminal plate 14 so that the electric wire can be easily pulled out. Each terminal board 14 is soldered to the circuit board 12, so that an external power source is connected to the circuit board 12, and outputs of relay contacts and the like are taken out to the outside. The cover block 2 includes a cover 20 and a sensor block 3 held by the cover 20. As shown in FIGS. 4 and 5, the sensor block 3 includes a hemispherical sensor body 30 whose front side (top side in FIG. 4) is open, and a sensor body 30 that covers the front side of the sensor body 30. A hemispherical lens 31 is coupled to the sensor body 30 to form a spherical sensor body. The sensor body 30 is delivered with a circuit board 32 fixed by a pair of self-tapping screws 33. The circuit board 32 includes a pyroelectric element TP that detects heat rays emitted from the human body and a sensor that detects ambient illuminance. A photoconductive cell PD for detection, a light emitting element PE that lights up when a heat ray is detected by the pyroelectric element TP, and the like are mounted. A light-shielding tube 32a is attached to the photoconductive cell PD so as to limit incident light. A total of six lead wires 32b and 32c are connected to the circuit board 32, and an extraction hole is formed in the peripheral wall of the sensor body 30. It is drawn out through 30a. The lens 31 is a Fresnel lens, and the center line of the lens 31 is aligned with the circuit board 3.
The pyroelectric element TP is arranged so as to substantially coincide with the center line of the detection surface of the pyroelectric element TP mounted on the pyroelectric element 2. Further, the lens 31 is divided into a plurality of regions each having a focal point near the pyroelectric element TP, and the detection range of the pyroelectric element TP is divided into a plurality of regions. A recess 30b having a circular opening is formed in the center of the rear surface of the sensor body 30, and a plurality of positioning holes 34a are formed in the bottom surface of the recess 30b, as shown in FIG. The sensor main body formed by the sensor body 30 and the lens 31 is held by a holder consisting of a hemispherical sensor holder 35 and a holder ring 36 coupled to the sensor holder 35. A pair of guide protrusions 30c are protruded from the outer peripheral surface of the sensor body 30, and the guide protrusions 30c are inserted into guide grooves 35a formed on the inner peripheral surface of the sensor holder 35 and rotate within the range of the guide grooves 35a. It is now possible to do so. Since the guide grooves 35a are formed on both the upper and lower surfaces of the sensor holder 35 in FIG. 1, the lens 31 is restricted to swing in the vertical direction. Further, a holding tube 35b is provided protruding from the bottom of the sensor holder 35, and a presser 34c, which is urged toward the sensor body 30 by a return spring 34b made of a coil spring, is housed in the holding tube 35b. . Therefore, sensor body 3
0 rotates, the tip of the presser 34c engages with the positioning hole 34a, thereby imparting articulation. Here, as shown in FIG. 6, an insertion hole 35d through which a part of the presser 34c can be inserted is bored in the bottom surface of the holding cylinder 3b. Further, as shown in FIG. 7, a temporary fixing protrusion 34d is provided protruding from the side surface of the presser 34C. c against the spring force of the return spring 34b to a position where the tip part cannot contact the positioning hole 34a, the temporary fixing protrusion 34d is inserted into the insertion hole 35d.
The pusher 34c is temporarily fixed by pressing against the inner peripheral surface of the pusher 34c so that the pusher 34c cannot be moved forward or backward. This temporarily fixed state can be easily released by pressing the portion of the presser 34c that protrudes from the holding cylinder 35b. A through hole 35c is bored in the sensor holder 35, and the lead wire 3 is connected to the sensor holder 35.
2b and 32C are drawn out to the outside. On the rear surface of the sensor holder 35, as shown in FIG. 6(a), a plurality of dimension adjustment ribs 37 are formed radially around the holding tube 35b. Each dimension adjustment rib 37 is formed with a narrow width (about 0.511 mm) and a low protrusion amount < about 0.3 xw. The holder ring 36 comes into contact with the periphery of the lens 31 to prevent the lens 31 from being removed,
The hook 3 is inserted into the locking hole 35e formed in the sensor holder 35.
By engaging 6a, it is coupled to the sensor holder 35. As described above, the sensor block 3 composed of the sensor body 3o, the lens 31, the sensor holder 35, the holder ring 36, etc. is mounted on the cover 20 while being held between the cover 20 and the presser metal fitting 21. . cover 2
0 is formed by an inner cover 22 and an outer cover 23 that covers the front surface of the inner cover 22, and a protrusion 24 is formed on the front surface of the inner cover 22, as shown in FIG. An opening window 24a having an opening surface that faces forward and slopes upward is formed in the projecting base 24, and the lower end of the opening window 24a substantially coincides with the front surface of the inner cover 22. The lens 31 of the sensor block 3 is exposed to the outside through this opening window 24a. In addition, the presser metal fitting 21 is attached to the inner cover 22.
It is fixed to the rear surface using four tapping screws 25, and a part of the sensor holder 35 is inserted into the presser metal fitting 21 through an opening 21a formed in the center of the metal fitting 21.
It is designed to protrude from behind. Here, the dimension between the presser metal fitting 21 and the inner cover 22 is set to be slightly smaller than the dimension of the sensor block 3, and by crushing the dimension adjustment rib 37 of the senna holder 35 with the presser metal fitting 21, the sensor block 3 to ensure that it is securely fixed. On the rear surface of the inner cover 22, there is a time adjustment volume for setting the time to keep the output on (or off) after a human body is detected by the pyroelectric element TP;
A circuit board 26 is mounted on which is mounted a volume for operating illuminance adjustment that sets the ambient illuminance detected by the photoconductive cell PD at which the human body detection operation is performed. The knobs 26a for adjusting each volume are exposed on the front surface of the inner cover 22, and the circuit board 26 is connected to a pair of hooks protruding from the rear surface of the inner cover 22, as shown in FIGS. 8 and 9. A support protrusion 29 for supporting the circuit board 26 is protruded between both hooks 28 . Therefore, the circuit board 26 is connected to the hook 2
A protrusion 28a is formed on the outer surface of both hooks 28 to be held on the inner cover 22 by the support protrusion 29 and the support protrusion 29, and as shown in FIG. The protrusion 2 is held by the pair of presser protrusions 21b provided.
By pressing the hooks 8a from the outside, the distance between the two hooks 28 is prevented from increasing, and the circuit board 26 is secured to the inner cover 2.
A lead wire 32b drawn out from the sensor block 3 is connected to the circuit board 26, which is firmly fixed to the sensor block 2, and a lead wire 32c is connected to the circuit board 12. Attachment holes 22a are provided at both upper and lower ends of the inner cover 22.
is perforated. In addition, a drainage block is provided at the front surface of the inner cover 22 in a region surrounding the protrusion 24 and the mounting hole 22a.
2b is provided in a protruding manner, and a draining recess 22c is formed at a portion corresponding to the lower end of the draining tab 22b. Further, a locking protrusion 22d is provided on the circumferential surface of the inner cover 22 and engages with the inner circumferential surface of the outer cover 23, thereby coupling the inner cover 22 and the outer cover 23. A protrusion 27 is protruded from the outer cover 23 so as to cover the protrusion 24 of the inner cover 22, and an opening window 27a that substantially coincides with the opening window 24a of the protrusion 24 is formed. The lower part of the projecting base 27 above the opening window 27a is inclined so as to project forward of the outer cover 23, and the sensor block 3
The projecting base 27 functions as an awning for sheltering from rain by being located inside the range extending downward from the peripheral edge of the opening window 27a. The cover 20 formed by the inner cover 22 and the outer cover 23 is coupled to the body 10 by engaging the hook 22e protruding from the inner cover 22 into the engagement hole 10a formed in the body 10. The device of the present invention is embedded in a mounting surface such as a wall with a body block 1 and a cover block 2 combined. A mounting frame 4 is used. The mounting frame 4 has an opening window 40 in the center into which the body 10 is inserted, and a reinforcing shaft 41 is inserted through both left and right sides. Further, a screw insertion hole 42 is bored in a portion of the inner cover 22 corresponding to the mounting hole 22a, and a nut 43 is held on the rear surface of the mounting frame 4 at a portion corresponding to the screw insertion hole 42. Therefore, by screwing the mounting screws 44 into the nuts 43 through the mounting holes 22a of the inner cover 22, the inner cover 22 can be fixed to the mounting frame 4. The mounting frame 4 has an elongated mounting hole 45 for fixing it to an embedded switch box or the like using box screws. Therefore, it can be embedded in a wall or the like and installed using the same construction method as wiring devices such as switches and outlets. In addition, the peripheral wall of the inner cover 22 has a cross-sectional path H.
A shaped waterproof packing 5 is attached, and the waterproof packing 5 is sandwiched between the inner cover 22 and a mounting surface such as a wall surface. The device of the present invention can be assembled in the following steps. First, with the lead wires 32b and 32C of the circuit board 32 passed through the lead-out hole 30a of the sensor body 30, the circuit board 32 is assembled.
Next, attach the lens 31 to the second sensor body 30, and connect the lead wires 32b, 32c to the through hole 35c of the sensor holder 35.
After passing through the sensor body 30, the sensor body 30 is delivered to the sensor holder 35 with the return spring 34b and the presser 34c attached to the holding cylinder 35b. Here, the presser 34C is temporarily fixed to the sensor holder 35 as described above, so that the spring force of the return spring 34b does not act on the sensor body 30. After that, when the holder ring 36 is coupled to the sensor holder 35, the sensor main body consisting of the sensor body 30 and the lens 31 is held by the sensor holder 35 and the holder ring 36. This assembly is installed in the protrusion 24 of the inner cover 22, and the presser metal fitting 21 is attached to the inner cover 22 using the self-tapping screws 25.Next, the presser 34c
When the temporarily fixed state is released, the presser 34c is urged toward the sensor body 30 by the spring force of the return spring 34b. In this state, the lead wires 32b, 32
solder c to the circuit board 26.12, respectively. Further, after the terminals 11 are installed in the body 10 and the terminals 11 are soldered to the circuit board 12, an insulating plate 13 is placed on the circuit board 12. On the other hand, the circuit board 26 is attached to the inner cover 22. In this state, the inner cover 22 is coupled to the body 10. Next, after attaching the waterproof gasket 5 to the inner cover 22, the shaft 41 is passed through the mounting frame 4, and then the nut 43 held on the mounting frame 4 is inserted through the mounting hole 22a of the inner cover 22.
screw the mounting screws 44 into the inner cover 22 and the outer cover 2.
3, a product having the shape shown in FIGS. 11 to 13 is completed. When mounting on a mounting surface such as a wall, remove the outer cover 23, remove the mounting screws 44, and mount the mounting frame 4 to an embedded switch box etc. buried in the mounting surface, and then connect the specified electric wire to the terminal 11. What is necessary is to connect the inner cover 22 to the mounting frame 4 using the mounting screws 44, and then fit the outer cover 23 onto the inner cover 22. Here, the opening windows 23a and 27a are attached so as to face diagonally downward. When the outer cover 2 is attached to the mounting surface in this way,
The protrusion 27 of No. 3 functions as an eaves to protect from rain, and the provision of the waterproof gasket 5 prevents rainwater from entering the interior. The double structure also prevents rainwater from entering. Furthermore, by forming the draining tab 22b on the front surface of the inner cover 22, even if rainwater should infiltrate into the outer cover 23, it will surely prevent the rainwater from entering inside the inner cover 22. It is possible. Additionally, if it is necessary to adjust the operating time or operating illuminance, you can remove the outer cover 23 to expose the inner cover 22 and use the adjustment knob 26.
A can be operated.

【Effect of the invention】

According to the structure of claim 1, since the sensor body is attached to the holder so as to be rotatable to form the sensor block, it is possible to form a unit including the function of rotating the sensor body. This has the advantage that even when changing specifications, it is sufficient to change the shape of the outer shell to which the sensor block is attached, making it easy to adapt to a wide variety of products. According to the structure of claim 2, the sensor body is provided with a plurality of positioning recesses, and the holder is provided with a presser that engages with the positioning recesses when the sensor body is rotated, so that the sensor body can be articulated. This makes it possible to position the sensor body with good reproducibility.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, Fig. 2 is a transverse cross-sectional view of the same, Fig. 3 is an exploded perspective view of the body block of the above, and Fig. 4 is an exploded perspective view of the cover block of the above. , 5th
The figure is an exploded perspective view of the same sensor block as above, Figure 6(a)
(b) is a back view and a partially cutaway side view of the same sensor holder as above, and FIG. 7 is a side view of the presser used in the above, and FIG.
The figure is a sectional view of the inner cover same as above, FIG. 9 is an explanatory view of the same as above with the body block and cover block removed,
Figure 0 is an exploded perspective view showing the mounting frame and waterproof packing used in the above, Figure 11 is a partially cutaway front view of the same, Figure 12 is a partially cutaway side view of the same, and Figure 13 is a rear view of the same. , 1st
FIG. 4 is a cutaway side view showing a conventional example. 1...Body block, 2...Cover block, 3
...Sensor block, 30...Sensor body, 31
...Lens, 35...Sensor holder, 36...Holder ring, TP...Pyroelectric element. Agent Patent Attorney Ishi 1) Chief 7 Figure 6 35e (b) Figure 9 2a Figure 7 Figure 8 2δ Figure 10 Figure 11 Figure 12

Claims (2)

[Claims] (1) A sensor block that includes a pyroelectric element that detects heat rays emitted from the human body, a sensor block that has a lens in front of the detection surface of the pyroelectric element, and a cover that holds the sensor block. A heat-sensitive automatic switch is formed of a spherical sensor body in which a pyroelectric element is housed, and a holder that rotatably holds the sensor body. (2) The holder is provided with a pusher urged by a return spring toward the sensor body, and the sensor body has a plurality of positioning elements that engage with the tip of the pusher when rotating relative to the holder. The heat-sensitive automatic switch according to claim 1, characterized in that a recess is formed.