JP4981621B2 - Photoelectric flasher - Google Patents

Description

  The present invention relates to a photoelectric automatic flashing device used by being attached to a building or the like.

  Conventionally, when the ambient illuminance is detected and the detected illuminance is lower than the predetermined illuminance, the power supply from the external power supply to the lighting load is turned on and the lighting load is turned on. There is provided an automatic flashing device called an EE switch that turns off the lighting load by turning off the power supply from the external power source to the lighting load when the voltage becomes higher (see, for example, Patent Document 1).

  As this type of automatic flasher, automatic flashers as shown in FIGS. 14A and 14B and FIGS. 15A and 15B are provided. 14A and 14B includes a base 940 installed on a wall surface of a structure and a decorative cover 910 that has a rear surface opened and is covered on the front surface of the base 940. In the housing 970, a circuit block (not shown) that includes an illuminance sensor that detects ambient illuminance, turns on / off power to the illumination load based on the detected ambient illuminance, and blinks the illumination load. Stored.

  Here, when the upper direction of FIG. 14 is the front of the automatic flasher, the lower direction is the rear of the automatic flasher, the upper left direction is the upper side of the automatic flasher, and the lower right direction is the lower side of the automatic flasher, the decorative cover 910 is After the lower end of the rear surface is fitted to the upper end of the base 940, the lower surface is slid downward to cover the front surface of the base 940. A pair of locking projections 911 a and 911 a (one not shown) provided on both sides of the rear lower end of the decorative cover 910 are engaged with locking portions 942 a and 942 b formed in an L shape on the front surface of the base 940. By stopping, the decorative cover 910 is fixed to the base 940. The front surfaces of the locking portions 942a and 942b are covered with a decorative cover 910, and are exposed downward by notches 971 and 971 (one not shown) provided at the rear end of the lower surface of the housing 970.

  When removing the decorative cover 910 from the base 940, a tool 999 such as a flat-blade screwdriver is inserted from the notches 971 and 971 of the housing 970, and unlocking portions 941a and 942a formed on the front surfaces of the locking portions 942a and 942b. By pressing 941b, the locking state between the locking protrusions 911a and 911a and the locking portions 942a and 942b is released, and in this state, the decorative cover 910 is slid upwardly from the base 940 and pulled forward.

  15A and 15B includes a base 940 installed on a wall surface of a structure, and an inner unit cover 920 that is open on the rear surface and is covered on the front surface of the base 940. A housing 970 is configured, and a decorative cover 910 is covered on the front surface of the inner cover 920. The housing 970 includes an illuminance sensor that detects the ambient illuminance, and stores a circuit block (not shown) that turns on and off the power supply to the illumination load based on the detected ambient illuminance and blinks the illumination load. .

  15 (a) and 15 (b), the upward direction is the front of the automatic flasher, the downward direction is the rear of the automatic flasher, the upper left direction is the upper side of the automatic flasher, and the lower right direction is the lower side of the automatic flasher. In this case, the decorative cover 910 covers the front surface of the housing 970 by sliding the lower end of the rear surface of the decorative cover 910 to the upper end of the housing 970 and then sliding the decorative cover 910 downward. A locking protrusion 990 (see FIG. 16) is provided at the approximate center of the back surface of the decorative cover 910, and the locking protrusion 990 of the decorative cover is locked to a locking piece 943 provided at the lower front surface of the housing 970. By doing so, the decorative cover 910 is fixed to the housing 970. The lower end of the front surface of the decorative cover 910 protrudes downward from the lower end of the locking piece 943, and the front surface of the locking piece 943 is covered with the decorative cover 910, and a notch 971 provided at the lower front end of the housing 970. Is exposed downward. Further, a notch recess is provided at the lower front end of the locking piece 943 to form a lock releasing portion 941.

When the decorative cover 910 is removed from the housing 970, a tool 999 such as a flat-blade screwdriver is inserted into the notch recess of the unlocking part 941 from the notch part 971 of the housing, and the lock releasing part 941 is pressed to The locking between the protrusion 990 and the locking piece 943 is released, and in this state, the decorative cover 910 is slid above the housing 970 and pulled forward.
JP 2006-012643 A

  By the way, the conventional photoelectric automatic flasher is generally arranged outdoors in order to control the on / off of the illumination load by the ambient illuminance outdoors. Outside, the temperature of the outside air changes greatly between day and night, while the inside of the housing is a closed space, so the temperature change is small between day and night. As a result, condensation may occur in the housing due to a temperature difference between inside and outside the housing.

  In the automatic flasher shown in FIG. 14, the interior of the housing is separated from the outside air by a single layer of the decorative cover. Therefore, when the temperature difference between the outside air and the housing is large, condensation occurs in the housing.

  In the automatic flasher shown in FIG. 15, the interior of the housing is separated from the outside by a decorative cover and an inner cover. However, since the back surface of the decorative cover is covered along the surface of the inner cover, no space is formed between the decorative cover and the housing, and the interior of the housing is substantially separated from the outside air (see FIG. 16). For this reason, when the temperature difference between the outside air and the inside of the housing 970 is large, condensation occurs in the housing.

  Thus, since the circuit block is housed in the housing, the dew condensation generated in the housing deteriorates the detection sensitivity of the illuminance sensor and shorts the circuit elements such as resistors, capacitors, and ICs in the circuit block. Cause malfunction and the like.

  Further, in the conventional photoelectric automatic flashing device, the lock release portion is covered with the decorative cover. For this reason, it is difficult to know where the unlocking part of the decorative cover is located, and it is difficult to remove the cover because it is necessary to remove it with a tool, and the housing is damaged when working with the tool. There was a case.

  The present invention has been made in view of the above reasons, and its purpose is a photoelectric automatic flasher capable of suppressing the occurrence of condensation in the housing even if a temperature difference occurs inside and outside the housing due to the influence of the outside world. Is to provide.

The invention of claim 1 comprises an illuminance detection means for detecting the ambient illuminance on one surface, and switches on and off the power supply to the illumination load based on the detected ambient illuminance, and flashes the illumination load inside. A housing that houses the circuit block; and a cover that covers at least an outer surface of the housing facing one surface of the circuit block; an air layer surrounded by the cover and the outer surface of the housing; and the one surface of the circuit block and the housing It is characterized by providing a double air layer comprising a space surrounded by the inner surface of the.

  According to this invention, the air layer provided in the space surrounded by the outer surface of the housing and the cover alleviates the temperature difference between the inside and outside of the housing. Thereby, the dew condensation to the circuit block installed in the housing, especially an illumination intensity detection means can be suppressed.

  According to a second aspect of the present invention, in the first aspect, the locking portion provided at one end of the cover is locked to the locked portion provided at one end of the housing, and the lock claw provided at the other end of the cover has The cover is covered on the outer surface of the housing by being locked to the locking protrusion provided at the other end of the housing, and when pressed, the locking protrusion of the housing is moved away from the lock claw of the cover and locked. An operation piece for releasing the locking state between the claw and the locking protrusion is provided so as to protrude from the other end of the housing.

  According to the present invention, after the locking portion of the cover is locked to the locked portion of the housing, the cover is covered with the outer surface of the housing by the operation of locking the lock claw of the cover to the locking protrusion of the housing. Can be installed. Thereby, an air layer surrounded by the outer surface of the housing and the cover can be easily formed. In addition, since the cover is fixed by being locked to the housing, it is easier to attach and remove the cover compared to the conventional configuration using a tool such as a screwdriver, and a large space for installing the photoelectric flasher. I don't need it. This makes it easy to attach and remove the cover even if the housing is installed in a narrower space than before, such as directly under the bay window. Further, an operation piece for releasing the locking state between the lock claw and the locking protrusion is provided so as to protrude from the other end of the housing. Thus, when the cover is removed, the protruding operation piece can be recognized at a glance, and how to remove the cover can be easily understood. In addition, even if a tool is not used to remove the cover, it is possible to easily release the locking claw and the locking projection by simply applying a force to the protrusion with a finger or the like. Will not hurt.

  According to a third aspect of the present invention, in the first aspect, the one end of the housing includes a holding portion that rotatably holds one end of the cover, and a lock claw provided on the other end of the cover is provided on the other end of the housing. The cover is covered on the outer surface of the housing by being locked to the provided locking protrusion, and when pressed, the locking protrusion of the housing is moved away from the lock claw of the cover to lock the locking claw and the locking protrusion. An operation piece for releasing the locked state is provided so as to protrude from the other end of the housing.

  According to the present invention, since the holding portion that rotatably holds one end of the cover is provided at one end of the housing, the cover is attached to the outer surface of the housing only by locking the lock claw of the cover and the locking protrusion of the housing. Can be covered. Thereby, an air layer surrounded by the outer surface of the housing and the cover can be easily formed, and further, the cover does not come off from the housing. Therefore, various settings can be made by the operation surface 217 provided on the surface of the housing without removing the cover from the housing, and a place for placing the removed cover becomes unnecessary. Further, an operation piece for releasing the locking state between the lock claw and the locking protrusion is provided so as to protrude from the other end of the housing. Thus, when the cover is removed, the protruding operation piece can be recognized at a glance, and how to remove the cover can be easily understood. In addition, without using a tool for removing the cover, it is possible to easily release the locking claw and the locking projection by simply applying a force to the protruding portion with a finger or the like. Will not hurt.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the cover includes an elastic body that biases the other end of the cover away from the other end of the housing with the one end side of the cover as a rotation shaft. .

  According to the present invention, the cover is automatically opened from the housing by the elastic body simply by pressing the operation piece. Thereby, various settings by the operation part provided in the housing surface can be made still easier.

  According to a fifth aspect of the present invention, in any one of the second to fourth aspects, the operation piece is formed with a rib that comes into contact with the housing when pressed down a predetermined distance.

  According to the present invention, when the operation piece is pushed too much, the rib provided on the operation piece comes into contact with the housing, so that the operation piece can be prevented from being damaged by being pushed too much.

  As described above, according to the present invention, it is possible to reduce the temperature difference between the inside and outside of the housing, and to suppress the dew condensation on the circuit blocks installed in the housing, particularly the illuminance detection means.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
The automatic flasher of this embodiment is demonstrated using FIGS. Here, in FIG. 2, the upper direction is the upper side of the automatic flasher, the lower direction is the lower side of the automatic flasher, the right direction is the right side of the automatic flasher, the left direction is the left side of the automatic flasher, and the front side is the automatic flasher. The front and back of is the rear of the automatic flasher. The automatic flashing device according to the present embodiment includes a rectangular base 4, a circuit block 3 installed on the front surface of the base 4, and an inner device cover that opens on the rear surface and covers the base 4 and the front surface of the circuit block 3. 2 and a decorative cover 1 covering the front surface of the inner cover 2, and the housing 7 is configured by covering the inner cover 2 on the base 4. In order to prevent water from entering the housing 7, a packing 5 is provided between the base 4 and an installation surface such as a wall surface of the structure.

  The circuit block 3 has an illuminance sensor 32 that detects ambient illuminance mounted on the front surface of the substrate 31, and turns on / off power supply to an illumination load (not shown) based on the ambient illuminance detected by the illuminance sensor 32. Has the function of blinking. In addition to the illuminance sensor 32, on the front surface of the substrate 31, a plurality of circuit element groups 33 for turning on / off and dimming the lighting load by controlling the power supplied to the lighting load using a thyristor, and the lighting load A variable resistor 31a for setting an ambient illuminance level (threshold value) for switching on / off of the power supply, an operation knob 311a for changing the resistance value of the variable resistor 31a, and a variable resistor 31b for setting a dimming level when the illumination load is turned on. And an operation knob 311b for changing the resistance value of the variable resistor 31b. Terminal portions 35a and 35b to which wirings 85a and 85b having an external power source and an illumination load provided at one end are connected are mounted on the rear left and right upper sides of the substrate 31. Further, notches 34a and 34b through which mounting screws 6 (described later) for fixing the inner cover 2 to the base 4 are inserted are formed below both sides of the substrate 31. Notches 34c and 34d are provided.

  The base 4 is formed in a substantially rectangular flat plate shape having rectangular openings 43a and 43b arranged side by side in the left-right direction, for example, by an opaque resin. In addition, insertion holes 41 through which mounting screws 6 for fixing the base 4 and the inner cover 2 are inserted from the rear are formed at the four corners of the base 4. Are provided with support recesses 42a and 42b.

  The inner cover 2 is made of a non-translucent synthetic resin or the like, and has a curved upper surface 2a that protrudes forward as it goes downward, a flat lower surface 2b that protrudes forward as it goes upward, and an upper surface 2a. And a central surface 2c that connects the lower surface 2b, and an operation surface 217 formed behind the central surface 2c with a stepped portion formed behind the central surface 2c.

  The operation surface 217 is provided with operation holes 211a and 211b and a daylighting hole 212. The operation holes 211a and 211b are inserted through the operation knobs 311a and 311b on the substrate 31 and protrude forward from the operation surface 217. The illuminance sensor 32 is exposed forward through the daylighting hole 212.

  Further, a setting explanation label 220 provided with holes 220a, 220b, and 220c corresponding to the operation holes 211a and 211b and the daylighting hole 212, respectively, is pasted on the front surface of the operation surface 217. The description which showed the operation setting of the illumination intensity level which switches on / off of the electric power feeding to the illumination load of the automatic blinker by the knob 311a, and the operation setting of the light control level at the time of lighting load lighting by the operation knob 311b is described.

  Screw holes (not shown) for screwing attachment screws 6 are provided at the four inner corners of the inner cover 2, and the screws 6 inserted through the insertion holes 41 of the base 4 are screwed into the screw holes. The inner cover 2 is attached to the base 4 by entering. At upper and lower portions of the inner surface of the inner cover 2, struts 213 a and 213 b project from the approximate center in the left-right direction.

  A concave portion 214a is provided at the substantially upper center of the upper surface 2a of the inner cover 2, and a U-shaped covering for locking the locking portion 12 provided on the decorative cover 1 is provided at the upper end of the concave portion 214a. A locking portion 214 is provided.

  Linear notches 215a and 215a are formed upward from the lower end of the lower surface 2b of the inner cover 2, and a flexible piece 215 is formed between the notches 215a and 215a. A rectangular operation piece 216 is provided so as to protrude downward substantially at the center of the lower end of the front surface of the bending piece 215, and is provided on the decorative cover 1 along the lower end of the back surface of the bending piece 215 on both sides of the operation piece 216. Band-shaped locking projections 215b and 215b for locking the lock claws 13 and 13 are provided. Further, plate-like ribs 219a and 219a projecting vertically upward from the lower end on both sides of the back surface of the operation piece 216 to the upper end of the back surface of the bending piece 215 are formed so as to incline downward from the front toward the rear. . A plate-like rib 219b that protrudes vertically upward from the lower end on both sides of the back surface of the flexure piece 215 to the upper end of the back surface of the flexure piece 215 is formed so as to be inclined downward as it goes from the front to the back.

  The decorative cover 1 is formed with an opaque synthetic resin or the like with an opening on the rear surface, and the upper surface 1a is inclined in a curved shape forward so as to increase the protruding dimension from the rear surface as it goes downward. The lower surface 1b is inclined forward in a flat shape so as to increase the projecting dimension from the rear surface as it goes upward. The lower surface 1b is formed with a daylighting hole 11 for taking ambient light into the illuminance sensor 32, and a daylighting window 111 made of a transparent synthetic resin or the like is attached to the daylighting hole 11 from behind the decorative cover 1. Yes. From the substantially upper center of the decorative cover 1, a locking portion 12 including a protruding piece 12 a having a locking piece 12 b whose rear end is bent upward protrudes. The locking piece 12 b is a U-shape of the inner cover 2. It engages with the tip 214b of the shaped engaged portion 214. A notch recess 121 that allows the operation piece 216 of the inner cover 2 to be exposed on the front surface is provided at substantially the center of the rear end of the lower surface 1b, and locking protrusions 215b of the inner cover 2 are provided on both sides of the notch recess 121. Band-shaped lock claws 13, 13 that are engaged with 215 b project upward.

  The packing 5 is for preventing water from entering the automatic flashing device, and is formed in a substantially rectangular shape with, for example, a rubber material, and has an opening 51 at the center.

  The automatic flasher of this embodiment is composed of the above-described members, and each member is arranged as follows.

  When the circuit block 3 is placed on the front surface of the base 4, the terminal portions 35 a and 35 b of the circuit block 3 are exposed rearward from the openings 43 a and 43 b of the base 4, and are formed on the substrate 31 of the circuit block 3. The notches 34 a and 34 b are arranged to face the insertion holes 41 and 41 below the base 4.

  Next, the rear surface side of the inner cover 2 is covered on the front surface of the base 4 on which the circuit block 3 is placed, and the column portions 213a and 213b provided on the inner surface of the inner cover 2 are formed in the support recesses 42a and 42b. The step 213c provided on the outer periphery of the support column 213a is engaged with the flange 42c provided on the lower end of the support recess 42a, and the step 213d provided on the outer periphery of the support column 213b is connected to the lower end of the support recess 42b. The inner cover 2 is positioned with respect to the base 4 by engaging with the provided flange 42d. The operation knobs 311a and 311b on the board 31 are inserted into the operation holes 211a and 211b of the inner cover 2 and the holes 220a and 220b of the setting explanation label 220, and protrude to the front of the inner cover 2. The upper illuminance sensor 32 faces forward through the daylighting hole 212 and the hole 220c of the setting instruction label 220.

  Then, the inner screw cover 2 is fixed to the base 4 by inserting the mounting screw 6 from the rear side of the base 4 into the insertion hole 41 and screwing it into a screw hole (not shown) provided on the back surface of the inner cover 2. The housing 4 is formed by the base 4 and the inner cover 2.

  Thereafter, the locking piece 12 b of the decorative cover 1 is inserted into the recess 214 a of the inner cover 2, and the upper surface of the locking piece 12 b is brought into contact with the tip 214 b of the locked portion 214. Then, with the contact portion between the locking piece 12b and the tip 214b as a fulcrum, the lower end of the decorative cover 1 is rotated downward to lock the locking piece 12b to the tip 214b, and then the decorative cover 1 is locked. The claws 13 and 13 are locked to the locking protrusions 215 b and 215 b of the inner cover 2. (See FIGS. 6A and 6B.) Thus, the decorative cover 1 is placed on the front surface of the housing 7.

  Further, the packing 5 is attached to the base 4 by fitting the outer periphery of the rear end of the base 4 into the fitting groove 52 formed along the outer periphery of the front surface of the packing 5 installed on the wall surface. The terminal portions 35a and 35b of the circuit block 3 are exposed rearward from the opening 51 of the packing 5, and the terminal portion 35a constitutes an input terminal to which a wiring 85a from an external power source (not shown) is connected. 35b constitutes an output terminal to which the wiring 85b from the lighting fixture is connected.

  The circuit block 3 detects ambient light incident from outside through the daylighting window 111 of the decorative cover 1, the hole 220c of the setting explanation label 220, and the daylighting hole 212 of the inner cover 2, and the illuminance sensor 32 detects the ambient light. Compare the detected ambient illuminance with the predetermined illuminance, and when the ambient illuminance is lower than the predetermined illuminance, turn on the power supply from the external power supply to the illumination load to light the illumination load, and the ambient illuminance lights When it becomes higher than the illuminance, an operation of turning off the power supply from the external power supply to the lighting load and turning off the lighting load is performed. The predetermined illuminance (threshold) to be compared with the ambient illuminance described above is set by changing the resistance value of the variable resistor 31a by the operation knob 311a, and the dimming level of the lighting load at the time of lighting is set by the operation knob 311b. It is set by changing the resistance value.

  In the automatic flashing device of this embodiment, an air layer 86 surrounded by the front surface of the inner cover 2 and the upper surface 1a and the lower surface 1b and the side surfaces 1c and 1d of the decorative cover 1 is formed. A space 70 in the housing 7 surrounded by the inner surface of the housing 7 is separated from the outside air by an air layer 86 having a two-layer structure of the inner cover 2 and the decorative cover 1. Therefore, even if the temperature difference between the inside of the housing 7 and the outside air is large, the temperature difference between the inside and outside of the housing 7 is mitigated by the air layer 86, and condensation on the circuit block 3 installed in the housing 7, particularly the illuminance sensor 32 is prevented. Can be suppressed.

  The space 70 in the housing 7 is also an air layer, and the double air layer composed of the air layer 86 and the space 70 further increases the dew condensation suppressing effect.

  Further, according to the automatic flashing device of the present embodiment, after the locking piece 12b provided on the locking portion 12 of the decorative cover 1 is locked to the tip 214b of the locked portion 214 of the inner cover 2, It is possible to cover the decorative cover 1 on the front surface of the inner cover 2 simply by locking the lock claw 13 of the decorative cover 1 to the locking protrusion 215 b of the inner cover 2. Thereby, the air layer 86 surrounded by the outer surface of the housing 7 and the inner surface of the decorative cover 1 can be easily formed. Moreover, a large space is not required for installing the automatic flasher.

  Next, the automatic flashing device of the present embodiment protrudes from the lower end of the inner cover 2 with an operation piece 216 for releasing the locking state between the lock claw 13 of the decorative cover 1 and the locking protrusion 215b of the inner cover 2. Provided. When the decorative cover 1 is removed, the operation piece 216 is pushed with a finger from the front, whereby the bending piece 215 is bent backward, and the locking projection 215b provided on the bending piece 215 is also moved backward. Thereby, the locked state of the lock claw 13 and the locking projection 215b is released. Thereafter, holding the both sides 1c, 1d of the decorative cover 1 and pulling the lower end upward on the front surface, the locking piece 12b provided on the locking portion 12 of the decorative cover 1 and the locked portion of the inner cover 2 The locked state of the 214 with the tip 214b is also released, and the decorative cover 1 can be easily removed from the inner cover 2 (see FIG. 10).

  Such an automatic flashing device of this embodiment is provided with an operation piece 216 that projects the locking state of the locking claw 13 of the decorative cover 1 and the locking projection 215b of the inner cover 2 so as to protrude from the lower end of the inner cover 2. Therefore, the user can recognize the operation piece 216 at a glance.

  Further, the locking state between the locking claw 13 and the locking projection 215b can be released by pressing the operation piece 216 with a finger from the front. Therefore, since a tool such as a flat-blade screwdriver is not used unlike the conventional automatic flashing device, the cosmetic cover 1 and the housing 7 are not damaged by the tool, and the operation piece 216 is locked by simply pushing it with a finger from the front. Since the nail | claw 13 and the latching state of the latching protrusion 215b are cancelled | released, the removal of the decorative cover 1 is easy.

  Furthermore, the automatic flashing device of this embodiment pushes the operation piece 216 with a finger from the front to release the locking state of the locking claw 13 of the decorative cover 1 and the locking projection 215b of the inner cover 2. When the operation piece 216 is pressed down a predetermined distance, the bending piece 215 and the ribs 219a and 219b provided on the back surface of the operation piece 216 come into contact with a contact surface 218 formed to face the back surface of the bending piece 215 (see FIG. 7). Thereby, it is possible to prevent the operation piece 216 from being pressed more than a predetermined distance, and to prevent stress breakage of the bending piece 215 due to excessive pressing of the operation piece 216.

(Embodiment 2)
The automatic flashing device of this embodiment will be described with reference to FIGS. Compared with the first embodiment, the automatic flasher of the present embodiment is different in the configuration of the decorative cover 1 and the inner cover 2 as shown in FIGS. Is characterized in that the upper end of the inner cover 2 is rotatably held on the upper end of the inner cover 2. Since other structures are the same as those in the first embodiment, the same reference numerals are given to the same components, and the description thereof is omitted.

  Instead of the locked portion 214 of the first embodiment, the inner cover 2 is rotatably fitted with shaft portions 14 and 14 of the decorative cover 1 described later on the upper left side and upper right side of the inner cover 2. The mating bearing portions 23 and 23 are provided. The left and right bearing portions 23, 23 form circular concave portions that are opened in the left direction and the right direction, respectively.

  The decorative cover 1 is provided with shaft portions 14 and 14 at the upper left inner side and upper right inner upper edge of the decorative cover 1 instead of the locking portion 12 of the first embodiment. The left shaft portion 14 and the right shaft portion 14 form circular convex portions that protrude in the right direction and the left direction, respectively.

  The decorative cover 1 of the automatic flasher of this embodiment is attached to the inner cover 2 as follows.

  First, the shaft parts 14 and 14 of the decorative cover 1 are fitted to the bearing parts 23 and 23 of the inner cover 2 from the front side of the inner cover 2. As a result, the shaft portions 14 and 14 at the upper end of the decorative cover 1 are rotatably held by the bearing portions 23 and 23 at the upper end of the inner cover 2.

  The lock claws 13 and 13 of the decorative cover 1 are engaged with the locking projections 215b and 215b of the inner cover 2 by rotating the lower end of the decorative cover 1 downward with the shaft portions 14 and 14 as rotational axes. To lock. Thereby, the decorative cover 1 is covered on the front surface of the housing 7.

  In the automatic flashing device of this embodiment, the shaft portions 14 and 14 of the decorative cover 1 are rotatably held by the bearing portions 23 and 23 of the inner device cover 2. Therefore, when the front surface of the housing 7 is exposed, by pushing the operation piece 216 from the front surface, the locking claw 13 of the decorative cover 1 and the locking projection 215b of the inner cover 2 are released, The front surface of the inner cover 2 can be exposed by holding both side surfaces 1c and 1d of the decorative cover 1 and lifting the lower end of the decorative cover 1 upward. Since the shaft portions 14 and 14 of the decorative cover 1 are held by the bearing portions 23 and 23 of the inner cover 2, the decorative cover 1 is not detached from the housing 7. Therefore, the user can easily set the illuminance level and the dimming level with the operation knobs 311a and 311b provided to protrude from the operation surface 217 on the front surface of the inner cover 2 without removing the decorative cover 1 from the housing 7. Can be done. Further, the decorative cover 1 is held by the inner cover 2, so that the place for placing the decorative cover 1 becomes unnecessary at the time of the above setting.

  Similarly to the first embodiment, an air layer 86 surrounded by the front surface of the inner cover 2 and the upper surface 1a, the lower surface 1b, and the side surfaces 1c and 1d of the decorative cover 1 is formed. A space 70 in the housing 7 surrounded by the inner surface of the housing 7 is separated from the outside air by an air layer 86 having a two-layer structure of the inner cover 2 and the decorative cover 1. Therefore, even if the temperature difference between the inside of the housing 7 and the outside air is large, the temperature difference between the inside and outside of the housing 7 is mitigated by the air layer 86, and condensation on the circuit block 3 installed in the housing 7, particularly the illuminance sensor 32, is prevented. Can be suppressed.

  The space 70 in the housing 7 is also an air layer, and the double air layer composed of the air layer 86 and the space 70 further increases the dew condensation suppressing effect.

(Embodiment 3)
The automatic flasher of this embodiment will be described with reference to FIG. In addition to the second embodiment, the automatic flasher of the present embodiment is characterized in that a torsion coil spring 87 that elastically biases the lower end of the decorative cover 1 away from the lower end of the inner cover 2 is provided. . Since other structures are the same as those of the second embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  The inner cover 2 is provided with a spring accommodating portion 24 having an opening at the front and the upper side for installing the torsion coil spring 87 at the substantially upper center of the upper surface 2a.

  The torsion coil spring 87 includes, for example, a coil portion 871 in which the wire is coiled with metal or the like to give elasticity, and U-shaped support portions 872a and 872b in which the wire is extended from both ends of the coil portion 871. It is formed (see FIG. 13).

  Then, after the shaft portions 14 and 14 at the upper ends on both inner sides of the decorative cover 1 are rotatably held by the bearing portions 23 and 23 at the upper ends of both sides of the inner cover 2, the axial direction of the coil portion 871 is changed to the left and right. The coil part 871 is disposed in the spring accommodating part 24 of the inner cover 2 in the direction. Next, the support portion 872a of the torsion coil spring 87 is locked to a lock portion (not shown) provided inside the decorative cover, and the support portion 872b of the torsion coil spring 87 is provided on the bottom surface of the spring storage portion 24. Lock to the locking part that does not.

  Then, with the shaft portions 14 and 14 as pivot axes, the decorative cover 1 is rotated downward against the elastic urging force of the torsion coil spring 87, so that the lock claws 13 and 13 of the decorative cover 1 are connected to the inner unit. The cover 2 is locked to the locking protrusions 215b and 215b. Thereby, the decorative cover 1 is covered on the front surface of the housing 7.

  In the automatic flashing device of the present embodiment, when the decorative cover 1 is installed on the inner cover 2, the torsion coil spring 87 attached to the spring accommodating portion 24 of the inner cover 2 It is elastically biased in a direction away from the lower end of the inner cover 1. When the locking state between the locking claw 13 of the decorative cover 1 and the locking protrusion 215b of the inner cover 2 is released by pushing the operation piece 216 of the inner cover 2 with a finger from the front, the torsion coil spring 87 The lower end of the decorative cover 1 is rotated upward by the elastic biasing force, and the front surface of the inner cover 2 is exposed. Thereby, the user can further easily perform the operation setting of the illuminance level and the dimming level by the operation knobs 311a and 311b provided to protrude from the operation surface 217 on the front surface of the inner cover 2.

  Similarly to the first embodiment, an air layer 86 surrounded by the front surface of the inner cover 2 and the upper surface 1a, the lower surface 1b, and the side surfaces 1c and 1d of the decorative cover 1 is formed. A space 70 in the housing 7 surrounded by the inner surface of the housing 7 is separated from the outside air by an air layer 86 having a two-layer structure of the inner cover 2 and the decorative cover 1. Therefore, even if the temperature difference between the inside of the housing 7 and the outside air is large, the temperature difference between the inside and outside of the housing 7 is mitigated by the air layer 86, and condensation on the circuit block 3 installed in the housing 7, particularly the illuminance sensor 32, is prevented. Can be suppressed.

  The space 70 in the housing 7 is also an air layer, and the double air layer composed of the air layer 86 and the space 70 further increases the dew condensation suppressing effect.

It is sectional drawing of the automatic flasher of Embodiment 1. It is a front view same as the above. It is an exploded perspective view same as the above. It is a front view same as the above (without a decorative cover). It is the perspective view and perspective view (without a decorative cover) of the rear surface of a decorative cover same as the above. (A) (b) It is an expanded sectional view of the upper part and the lower part same as the above. It is side surface sectional drawing of the lower part same as the above. It is an enlarged view of the rear lower part same as the above. It is a rear view same as the above. It is the figure which showed removal of the same cosmetic cover. (A) (b) It is a perspective view of the automatic flasher of Embodiment 2. FIG. It is a perspective view of the automatic flasher of Embodiment 3. (A) (b) It is a perspective view of a torsion coil spring same as the above. (A) (b) It is the perspective view and exploded perspective view of the conventional automatic blinker. (A) (b) It is the perspective view and exploded perspective view of the conventional automatic blinker. It is side surface sectional drawing same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cosmetic cover 2 Inner unit cover 3 Circuit block 32 Illuminance sensor 4 Base 7 Housing 86 Air layer

Claims (5)

An illuminance detection means for detecting ambient illuminance on one side, a circuit block for turning on and off the power supply to the illumination load based on the detected ambient illuminance, and flashing the illumination load;
A housing for storing the circuit block inside,
A cover that covers at least an outer surface of the housing facing one surface of the circuit block,
A double air layer comprising an air layer surrounded by a cover and an outer surface of the housing and a space surrounded by the one surface of the circuit block and the inner surface of the housing is provided.
Photoelectric flasher. A locking portion provided at one end of the cover is locked to a locked portion provided at one end of the housing, and a lock claw provided at the other end of the cover is engaged with a locking projection provided at the other end of the housing. By locking, the cover covers the outer surface of the housing,
Providing an operation piece that protrudes from the other end of the housing to move the locking projection of the housing away from the lock claw of the cover and release the locked state of the locking claw and the locking projection when pressed. Features
The photoelectric automatic flasher according to claim 1. One end of the housing includes a holding portion that rotatably holds one end of the cover, and a lock claw provided on the other end of the cover engages with a locking projection provided on the other end of the housing. Covering the outer surface of the housing,
An operation piece that releases the locking state between the locking claw and the locking projection by moving the locking projection of the housing away from the lock claw of the cover when pressed is provided to protrude from the other end of the housing. Characterized by the
The photoelectric automatic flasher according to claim 1. It has an elastic body that biases the other end of the cover away from the other end of the housing with the one end side of the cover as a rotation axis,
The photoelectric automatic flasher according to claim 3. The operation piece is formed with a rib that comes into contact with the housing when pressed down a predetermined distance.
The photoelectric automatic flasher according to any one of claims 2 to 4.

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