JP2510662Y2 - Heat sensitive automatic switch - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention detects the heat rays emitted from the human body and turns on the
The present invention relates to a heat-sensitive automatic switch that is turned off.

[Prior art]

Conventionally, as this type of heat-sensitive automatic switch, as shown in FIG. 14, a pyroelectric element TP for detecting heat rays radiated from a human body is installed and a lens 31 is provided in front of a detection surface of the pyroelectric element TP.
The sensor main body 38 provided with is attached to the case 6 so that the lens 31 is exposed on the front surface. Since the detection direction needs to be changed according to the installation location, the sensor body 38 is rotatably attached to the case 6. Further, in order to position the sensor body 38 with good reproducibility, a plurality of positioning protrusions 39a are provided on the rear surface of the sensor body 38, and by engaging the holding plate 39b provided in the case 6, the sensor body 38 It is designed to give a node motion when rotating.

[Problems to be solved by the device]

In the heat-sensitive automatic switch configured as described above, when the sensor main body 38 is rotated many times, the positioning protrusion 39a is worn out so that no joint movement is possible, and reproducibility of positioning cannot be ensured. On the other hand, if the contact pressure of the pressing plate 39b with respect to the sensor main body 38 is reduced so as to reduce the abrasion of the positioning protrusion 39a, there is a problem that the sensor main body 38 rattles. The present invention is intended to solve the above problems,
An object of the present invention is to provide a heat-sensitive automatic switch that prevents rattling of the sensor body without hindering rotation of the sensor body.

[Means for Solving the Problems]

In order to achieve the above object, in the structure of claim 1, a pyroelectric element for detecting a heat ray emitted from a human body is installed, and a sensor block provided with a lens in front of a detection surface of the pyroelectric element, The sensor block is provided with a cover that is mounted so that the lens is exposed, and the sensor block is formed by a spherical sensor body in which the pyroelectric element is mounted and a holder that rotatably holds the sensor body. , The cover is fixed with a clamp fitting that holds the sensor block between the cover and the cover, and an opening is provided in the center of the clamp bracket. The protrusions are projected and the dimension adjusting ribs are attached to the peripheral edge of the opening of the holding metal fitting in a pressed manner. According to the structure of claim 2, the cover is formed with a support protrusion for supporting the circuit board connected to the pyroelectric element, and a pair of hooks hooked on both side edges of the circuit board. The pressing projections are formed so as to prevent the hooks from expanding in distance by pressing.

[Action]

According to the configuration of claim 1, the sensor block is formed by the spherical sensor body in which the pyroelectric element is mounted and the holder that rotatably holds the sensor body, and the sensor block includes the cover and the pressing metal fitting. Since a plurality of dimension adjusting ribs are formed so that at least a part of the outer peripheral surface of the sensor block is spherical, the dimension adjusting ribs are pressed against the peripheral edge of the opening provided in the holding metal fitting. The sensor block is positioned without rattling by pressing the dimension adjustment ribs against the pressing bracket, and the sensor body is rotated in the holder provided in the sensor block. Even if the contact pressure is high, the rotation of the sensor body is not hindered. According to the structure of claim 2, the cover is formed with a support protrusion for supporting the circuit board connected to the pyroelectric element, and a pair of hooks hooked on both side edges of the circuit board. Since the pressing protrusion that prevents the hook distance from expanding by pressing is formed, the circuit board is firmly fixed to the cover, and the operation part for adjustment is provided on the circuit board. Even if you are mounting the parts
The circuit board does not rattle due to the operation.

【Example】

As shown in FIGS. 1 and 2, basically, the body block 1 and the cover block 2 are connected to each other. As shown in FIG. 3, the body block 1 includes a plurality of terminals in a body 10 whose front surface (upper surface in FIG. 3) is open.
11, a circuit board 12 on which a signal processing circuit for processing a signal from a sensor block 3 described later and a power supply circuit are mounted, and an insulating plate 13 that covers the front surface of the circuit board 12 are formed.
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, and as shown in FIG.
A well-known quick-connect terminal is formed in which an electric wire inserted through an electric wire insertion port 16 formed in the rear surface of the body 10 is sandwiched between a terminal plate 14 and a locking spring 15. Further, a release button 17 is provided at a portion corresponding to the lock spring 15, and a driver or the like is inserted through a jig insertion opening 18 formed in the rear surface of the body 10 to release the release button 17.
When is operated, the locking spring 15 bends away from the terminal plate 14 and the electric wire can be easily pulled out. Since each terminal board 14 is soldered to the circuit board 12, an external power source is connected to the circuit board 12 and the output of the relay contact is 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 has a hemispherical sensor body 30 having an opening on the front surface side (upper surface side in FIG. 4) and a sensor body 30 that covers the front surface of the sensor body 30. And a hemispherical lens 31 coupled to the sensor body 30 to form a spherical sensor body. A circuit board 32 is mounted on the sensor body 30 in a state of being fixed by a pair of tapping screws 33. The circuit board 32 includes a pyroelectric element TP that detects heat rays radiated from the human body, a photoconductive cell PD that detects ambient illuminance, and a light emitting element PE that lights up when the heat rays are detected by the pyroelectric element TP. Will be implemented. 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 from the circuit board 32 and are drawn out to the outside through an extraction hole 30a formed in the peripheral wall of the sensor body 30. The lens 31 is a Fresnel lens, and the center line of the lens 31 is arranged so as to substantially coincide with the center line of the detection surface of the pyroelectric element TP mounted on the circuit board 32. Further, the lens 31 is divided into a plurality of regions each having a focus 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 of the recess 30b as shown in FIG. The sensor body formed by the sensor body 30 and the lens 31 is held by a holder including a hemispherical sensor holder 35 and a holder ring 36 coupled to the sensor holder 35. A pair of guide protrusions is provided on the outer peripheral surface of the sensor body 30.
A protrusion 30c is provided, and the guide protrusion 30c is inserted into a guide groove 35a formed on the inner peripheral surface of the sensor holder 35 so that the guide protrusion 30c can rotate within the range of the guide groove 35a. Guide groove 35a is first
Since the sensor holder 35 is formed on both upper and lower surfaces in the figure, the lens 31 is restricted to swing in the vertical direction. The bottom of the sensor holder 35 has a holding tube 35.
b is projected, and a pressing element 34c biased toward the sensor body 30 by a return spring 34b formed of a coil spring is housed in the holding cylinder 35b. Therefore, when the sensor body 30 rotates, the distal end portion of the pressing element 34c engages with the positioning hole 34a, so that nodal motion is imparted. Here, as shown in FIG. 6, the holding cylinder 35b
An insertion hole 35d that allows a part of the pressing element 34c to be inserted is formed on the bottom surface of the. Further, as shown in FIG. 7, temporary pressing protrusions 34d are provided on the side surface of the pressing element 34c, and the pressing element 34c is applied to the spring force of the return spring 34b to a position where the tip cannot contact the positioning hole 34a. When pushed in against, the temporary fixing protrusion 34d is pressed against the inner peripheral surface of the insertion hole 35d to press the pusher 34c.
It is designed to temporarily stop so that you cannot move back and forth. This temporarily fixed state can be easily released by pressing a portion of the pressing element 34c protruding from the holding cylinder 35b. A through hole 35c is bored in the sensor holder 35 so that the lead wires 32b, 32c can be pulled out to the outside. On the rear surface of the sensor holder 35, as shown in FIG. 6 (a), a plurality of dimension adjusting ribs 37 are formed radially around the holding tube 35b. Each of the dimension adjusting ribs 37 has a narrow width (about 0.5 mm) and a small protrusion amount (about 0.3 mm). The holder ring 36 contacts the peripheral portion of the lens 31 to prevent the lens 31 from coming off. Therefore, by engaging the hook 36a with the locking hole 35e formed in the sensor holder 35, the holder ring 36 is attached to the sensor holder 35. Be combined. As described above, the sensor block 3 including the sensor body 30, the lens 31, the sensor holder 35, the holder ring 36, and the like is mounted on the cover 20 while being sandwiched between the cover 20 and the press fitting 21. . As shown in FIG. 4, the cover 20 is formed of 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. An opening window 24a having an opening surface inclined upward toward the front is formed on the protrusion 24, and the lower end of the opening window 24a is substantially aligned with the front surface of the inner cover 22. Sensor block 3 through this opening window 24a
The lens 31 of is exposed to the outside. Further, since the holding metal fitting 21 is fixed to the rear surface of the inner cover 22 by using four tapping screws 25, a part of the sensor holder 35 passes through the opening 21a formed in the central portion of the holding metal fitting 21. It is designed to project to the rear of the press fitting 21. Here, the dimension between the press fitting 21 and the inner cover 22 is determined by the sensor block 3
The size of the sensor block 3 is set to be slightly smaller than that of the sensor block 3, and the size of the size adjusting rib 37 of the sensor holder 35 is crushed by the pressing metal fitting 21 so that the sensor block 3 is securely fixed. On the rear surface of the inner cover 22, there are a time adjusting volume for setting a time for keeping the output on (or off) after the human body is detected by the pyroelectric element TP, and an ambient illuminance detected by the photoconductive cell PD. A circuit board 26 mounted with a volume for adjusting the operation illuminance that sets the time when the human body detection operation is performed is mounted. The knob 26a for adjusting each volume is exposed on the front surface of the inner cover 22. As shown in FIGS. 8 and 9, the circuit board 26 is held between a pair of hooks 28 projectingly provided on the rear surface of the inner cover 22, and the circuit board 26 is provided between the hooks 28. A supporting protrusion 29 for supporting the 26 is provided in a protruding manner. Therefore, the circuit board
The hook 26 and the support protrusion 29 hold the hook 26 on the inner cover 22. Projections 28a that bulge outward are formed on the outer surfaces of both hooks 28, and as shown in FIG. 9, by pressing the projections 28a from the outside by a pair of pressing projections 21b provided on the pressing fitting 21. The distance between the hooks 28 is prevented from increasing and the circuit board 26 is firmly fixed to the inner cover 22. The lead wire 32b drawn from the sensor block 3 is connected to the circuit board 26, and the lead wire 32c is connected to the circuit board 12. Mounting holes 22a are formed in both upper and lower ends of the inner cover 22. Further, on the front surface of the inner cover 22, a draining rib 22b is projectingly provided at a portion surrounding the protrusion 24 and the mounting hole 22a, and a draining recess 22c is formed at a portion corresponding to a lower end of the draining rib 22b. Further, a locking protrusion 22d is provided on the peripheral surface of the inner cover 22 so that the inner cover 22 and the outer cover 23 are joined by engaging with the inner peripheral surface of the outer cover 23. The outer cover 23 has a protrusion so as to cover the protrusion 24 of the inner cover 22.
27 is provided so as to project, and an opening window 27a that substantially matches the opening window 24a of the stand 24 is formed. The upper part of the protrusion 27 above the opening window 27a is inclined so that the lower part thereof projects toward the front of the outer cover 23, and the sensor block 3 is positioned inside the range in which the peripheral edge of the opening window 27a is extended downward. Stand
The 27 is designed to function as a canopy for avoiding rain. A cover formed by the inner cover 22 and the outer cover 23
20 is formed by engaging a hook 22e protruding from the inner cover 22 with an engagement hole 10a formed in the body 10.
Is combined with The device of the present invention comprises a body block 1 and a cover block 2.
Since they are embedded in a mounting surface such as a wall surface in a state where they are combined with each other, a mounting frame 4 made of synthetic resin as shown in FIG. 10 is used for mounting on the mounting surface. The mounting frame 4 is provided with an opening window 40 into which the body 10 is inserted at the center, and reinforcing mandrels 41 are inserted on both left and right sides. A screw insertion hole 42 is bored in a portion of the inner cover 22 corresponding to the attachment hole 22a, and a nut 43 is held on the rear surface of the attachment frame 4 at a portion corresponding to the screw insertion hole 42. Therefore, the inner cover 22 can be fixed to the mounting frame 4 by screwing the mounting screw 44 into the nut 43 through the mounting hole 22a of the inner cover 22. The mounting frame 4 has a long hole-shaped mounting hole 45 for fixing the embedded switch box or the like with a box screw.
Is perforated. Therefore, it can be mounted in the form of being embedded in a wall surface or the like by a construction method similar to that of wiring devices such as switches and outlets. Also, the inner cover
A waterproof packing 5 having a substantially H-shaped cross section is attached to the peripheral wall of 22,
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 may be assembled by the following procedure.
First, connect the lead wires 32b and 32c of the circuit board 32 to the sensor body 30.
The circuit board 32 is fixed to the sensor body 30 with the tapping screw 33 while being passed through the drawing hole 30a. Next, the lens 31 is attached to the sensor body 30, and the through hole 35 of the sensor holder 35 is attached.
After passing the lead wires 32b, 32c through c, return spring 34b and pusher 3
The sensor body 30 is installed in the sensor holder 35 with 4c and 4c mounted on the holding cylinder 35b. Here, the pressing element 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 body including the sensor body 30 and the lens 31 is held by the sensor holder 35 and the holder ring 36. This assembly is the inner cover 22
It is installed in the protrusion 24 of the and is covered with the tapping screw 25.
Attach the presser fitting 21 to 22. Next, when the temporarily fixed state of the pressing element 34c is released, the pressing element 34c is biased toward the sensor body 30 by the spring force of the return spring 34b. In this state, the lead wires 32b and 32c are soldered to the circuit boards 26 and 12, respectively. Further, after mounting the terminals 11 in the body 10 and soldering the terminals 11 to the circuit board 12, the 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 joined to the body 10. Next, attach the waterproof packing 5 to the inner cover 22.
Then, the mandrel 41 is passed through the mounting frame 4, and the mounting screws 44 are screwed into the nuts 43 held by the mounting frame 4 through the mounting holes 22a of the inner cover 22. Then, the product having the shape shown in FIGS. 11 to 13 is completed. When mounting on a mounting surface such as a wall surface, the outer cover 23 is removed, the mounting screws 44 are removed, and the mounting frame 4 is mounted on the embedded switch box or the like embedded in the mounting surface, and then a predetermined electric wire is connected to the terminal 11. The inner cover 22 may be coupled to the mounting frame 4 by the mounting screws 44, and the outer cover 23 may be fitted onto the inner cover 22. Here, the opening windows 23a and 27a are attached so as to face obliquely downward. With the product attached to the mounting surface in this way, the outer cover
23 piers 27 function as eaves to avoid rain,
The provision of the waterproof packing 5 prevents rainwater from entering inside, and the cover 20 has a double structure including an outer cover 23 and an inner cover 22 to prevent rainwater from entering. You can do it. Further, since the draining rib 22b is formed on the front surface of the inner cover 22, even if rainwater enters the outer cover 23, it is possible to reliably prevent the rainwater from entering the inside of the inner cover 22. It is possible. Further, if it is necessary to adjust the operation time or the operation illuminance, the outer cover 23 can be removed to expose the inner cover 22, and the adjustment knob 26a can be operated.

[Effect of device]

According to the configuration of claim 1, the sensor block is formed by the spherical sensor body in which the pyroelectric element is mounted and the holder that rotatably holds the sensor body, and the sensor block includes the cover and the pressing metal fitting. Since a plurality of dimension adjusting ribs are formed so that at least a part of the outer peripheral surface of the sensor block is spherical, the dimension adjusting ribs are pressed against the peripheral edge of the opening provided in the holding metal fitting. The sensor block is positioned without rattling by pressing the dimension adjustment ribs against the pressing bracket, and the sensor body is rotated in the holder provided in the sensor block. There is an advantage in that the rotation of the sensor body is not hindered even if the contact pressure is high. According to the structure of claim 2, the cover is formed with a support protrusion for supporting the circuit board connected to the pyroelectric element, and a pair of hooks hooked on both side edges of the circuit board. Since the pressing protrusion that prevents the hook distance from expanding by pressing is formed, the circuit board is firmly fixed to the cover, and the operation part for adjustment is provided on the circuit board. Even if you are mounting the parts
The circuit board does not rattle due to the operation.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a lateral sectional view of the same, FIG. 3 is an exploded perspective view of a body block of the same, and FIG. 4 is an exploded perspective view of a cover block of the same. , Fifth
The figure is an exploded perspective view of the above sensor block, FIG. 6 (a).
(B) is a rear view and a partially cutaway side view of the above-mentioned sensor holder, respectively, and FIG. 7 is a side view of the presser used in the same, and FIG.
FIG. 10 is a sectional view of the inner cover of the above, FIG. 9 is an explanatory view of a state in which the body block and the cover block of the above are removed, and FIG.
The figure is an exploded perspective view showing a mounting frame and a waterproof packing used in the same as above, FIG. 11 is a partially cutaway front view of the same, FIG. 12 is a partially cutaway side view of the same, and FIG. 13 is a rear view of the same. FIG. 14 is a cutaway side view showing a conventional example. 1 ... Body block, 2 ... Cover block, 3 ... Sensor block, 21 ... Pressing metal fitting, 21a ... Opening, 21b ... Pressing projection piece,
26 ... Circuit board, 28 ... Hook, 29 ... Support protrusion, 30 ... Sensor body, 31 ... Lens, 35 ... Sensor holder, 36 ... Holder ring, TP ... Pyroelectric element.

Claims (2)

(57) [Scope of utility model registration request] 1. A sensor block in which a pyroelectric element for detecting heat rays radiated from a human body is installed, and a sensor block provided with a lens in front of a detection surface of the pyroelectric element, and a sensor block which exposes the lens. The sensor block includes a spherical sensor body in which a pyroelectric element is installed,
It is formed by a holder that rotatably holds the sensor body, and a cover is fixed to the cover with a holding metal fitting that holds the sensor block between the cover and the cover. A heat-sensitive automatic switch, characterized in that at least a part thereof is spherical and a plurality of dimension adjusting ribs are provided in a protruding manner, and the dimension adjusting ribs are pressed against the peripheral edge of the opening of the holding metal fitting. 2. A cover is formed with a support protrusion for supporting a circuit board connected to the pyroelectric element, and a pair of hooks hooked on both side edges of the circuit board. 2. The heat-sensitive automatic switch according to claim 1, wherein a pressing projection piece is formed to prevent the hook from expanding the distance by being pressed.