JPH0816948A - Visual recognition structure for indicating lamp - Google Patents

Abstract

PURPOSE:To easily and visually recognize an indicating lamp which is attched at a high position and radiates the light in the horizontal direction without protruding horizontally the lamp over the vertical surface of its casing by forming obliquely the surface of a wall part so as to make it sink toward its inside. CONSTITUTION:A spectroscope 14a is unified with a display LED 101 so that the output light of the LED 101 is directly transmitted through a part of a transparent circuit cover 14 set opposite to the LED 101 and also bent downward at a right angle. An opening is formed at a position of a cover 2 where the diode 101 is opposed to the spectroscope 14a so that the spectroscope 14a is horizontally exposed to the outside. Both upper and lower wall parts which form the opening sink obliquely so that the spectroscope 14a never protrudes over the front face of the cover 2 even if the spectroscope 14a is exposed to the outside. Furthermore the wall part lower than the lower wall part tilts backward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is mounted on a high place,
Regarding the visual recognition structure of a display lamp that emits light in the horizontal direction, for example, a projector and a receiver for near infrared light are separated and placed at a high place,
The present invention relates to a visual confirmation structure of an indicator light suitable for a photoelectric separation type smoke sensor that detects a fire by detecting attenuation due to smoke.

[0002]

2. Description of the Related Art In a photoelectric separated smoke detector in which a light emitter and a light receiver are separately arranged, a light emitter and a light receiver are provided separately from a light emitting element for smoke detection, as disclosed in Japanese Patent Laid-Open No. 6-94616. The provided indicator lamp is arranged so as to emit light in the horizontal direction, and the optical axis is adjusted. In addition, the light of this indicator lamp is configured to emit light downward as well, and it is controlled so that it flashes at a predetermined cycle during normal monitoring and continues to light when smoke of a predetermined concentration or more is detected. It

By performing such a display, the optical axes of the projector and the receiver installed on the ceiling or the like can be adjusted by one indicator lamp, and at the same time, one of the plurality of detectors reports and receives. When the alert display is displayed on the aircraft side, a staff member can go to the location where the sensors are installed and check which sensor issued the alert.

[0004]

However, in this type of indicator lamp, since the indicator lamp is arranged so as to emit light in the horizontal direction, the indicator lamp can be easily visually recognized from the front, but the height of the ceiling or the like is high. There is a problem that it is difficult to visually recognize it from below when it is attached to a place. In order to solve such a problem, it is conceivable that the indicator lamp itself or an optical member for guiding the light of the indicator lamp is configured to project in the horizontal direction from the vertical surface of the housing to emit the light. But,
With such a configuration, there is a problem that the appearance becomes unsatisfactory and the indicator lamp and the optical member are damaged during installation work or transportation.

In view of the above conventional problems, the present invention allows a display lamp which is mounted at a high place and emits light in a horizontal direction to be easily visually recognized from below without protruding horizontally from a vertical surface of a housing. It is an object of the present invention to provide a visual confirmation structure of an indicator light that can be operated.

[0006]

In order to achieve the above object, the present invention comprises an indicator lamp arranged so as to emit light in a horizontal direction, and a casing having a substantially vertical wall portion. In the visual confirmation structure of the indicator lamp, an opening is formed in the wall for placing the tip of the indicator lamp so as to project in the horizontal direction, and below the opening so that the tip of the indicator lamp does not protrude from the entire surface of the wall. The first surface of the side wall is formed so as to be inclined so as to be recessed inside the housing, and the second surface of the lower wall of the first surface is further formed.
The surface is formed so as to be inclined rearward.

According to the present invention, the indicator lamp is composed of a light emitting element arranged so as to emit light in a horizontal direction, and an optical member which directly transmits the light emitted from the light emitting element forward and refracts downward. Characterize. The present invention is also characterized in that the optical member is formed integrally with a transparent cover that accommodates the substrate on which the light emitting element is mounted.

According to the present invention, the indicator lamp includes a light emitting element arranged so as to emit light in a horizontal direction, and a part of a transparent cover for accommodating a substrate on which the light emitting element is mounted has a wall portion. It is characterized in that it is formed so as to cover the tip of the light emitting element protruding from the surface. The present invention is also characterized in that the indicator lamp is composed only of light emitting elements arranged so as to emit light in the horizontal direction.

The invention further includes a third wall of the upper wall of the opening.
Is formed so as to be inclined so as to be recessed inside the housing, and a member for reflecting the light of the indicator lamp downward is provided on the third surface. According to the present invention, the indicator light is emitted horizontally in the photoelectric separation type smoke detector which separates the projector and the receiver from each other and is placed at a high place, and detects the attenuation by smoke between them to detect a fire. The optical axes of the light projector and the light receiver are adjusted by light, and the fire detection state is displayed by the light emitted downward.

[0010]

In the present invention, the first surface of the lower wall portion of the opening from which the tip of the indicator lamp projects in the horizontal direction is formed so as to be inclined so as to be recessed inside the housing, and the first surface Since the second surface of the lower wall is formed so as to be inclined rearward, the indicator lamp that is mounted at a high place and emits light in the horizontal direction should be projected in the horizontal direction from the vertical surface of the housing. It can be easily seen from below.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an optical receiver of a photoelectric separated smoke detector as an embodiment of the present invention. The light receiver 1 is configured separately from a light projector (not shown), and the light receiver 1 and the light projector are installed so as to face each other at a high place such as a side wall near the ceiling. In FIG. 6, the housing of the light receiver 1 is composed of a vertically long cover 2 and a main body 3, and allows the cover 2 to pass near infrared light.
Window 2 made of, for example, polycarbonate that blocks visible light
A is provided. Further, the cover 2 has a cover fixing wire 4, a fixing metal fitting 5, and a cover fixing metal 6 with respect to the main body 3.
The lens holder 7 has an optical axis / light receiving amount adjusting mechanism housed in the main body 3 as shown in an exploded view. Further, the mounting plate 8 is screwed to the side wall near the ceiling so that the mounting plate 8 has a locking piece 8A.
The main body 3 is locked to.

Next, the mechanism housed in the main body 3 will be described in detail. First, the base 9 of the optical axis / light receiving amount adjusting mechanism is made of metal fittings having an L-shaped cross section, and is horizontal to the main body. Fixed. Below the base 9, a shield case 10 and a printed circuit board 1 on which circuit components for receiving light are mounted
1, the power supply substrate 12 and the light receiving substrate insulating sheet 13 are housed in a transparent circuit cover 14.

The base 9 has a fitting hole 9A into which an adjusting screw 20A for adjusting the horizontal direction of the lens holder 7 is fitted in the optical axis direction, and the lens holder 7 and its supporting member 15 are rotated in the horizontal direction. A shaft hole 9B for supporting the lens holder 7 and a locking hole 9C for locking one end of the coil spring 16 for preventing horizontal play of the lens holder 7 are formed.

A separator 17 is attached to the shaft hole 9B of the base 9 with an attaching screw 18.
Are vertically fitted into the flange portions 9D and 9E of the base 9 so as not to rotate in the horizontal direction. The separator 17 is formed with a hole 17A through which one end of the coil spring 16 penetrates, a recess 17B for accommodating the body of the coil spring 16 and a shaft hole 17C.

The lens holder 7 is supported rotatably in a vertical direction with respect to a support member 15 having a U-shaped front cross section.
The support member 15 has the above-described mounting screw 18 as an axis,
It is attached to the shaft hole 17C of the separator 17 so as to be rotatable in the horizontal direction with respect to the shaft hole of the base 9. First, the horizontal rotation mechanism will be described. The support member 15 is formed with a locking hole 15B for locking the receiving screw 19B in the vertical direction at a position deviated from the shaft hole 15B. 19B has the above-mentioned horizontal adjustment screw 2
The screw thread is formed so that 0A is screwed in the optical axis direction. Therefore, when the adjusting screw 20A is rotated, the support member 15 is horizontally rotated about the mounting screw 18.

A locking hole 15C for locking the other end of the coil spring 16 in the vertical direction and an adjusting screw 20B for adjusting the vertical direction of the lens holder 7 are fitted in the support member 15 in the optical axis direction. A fitting hole 15D is formed, and the lens holder 7 is supported by the support member 15 so as to be vertically rotatable about the screws 21 and 22 as axes. A coil spring 23 for preventing vertical play of the lens holder 7 is attached to the lens holder 7. One end of the coil spring 23 is the locking hole 15 of the support member 15.
It is locked to E and the other end is locked to the locking piece 7A of the lens holder 7.

A receiving screw 19B is laterally attached to a side surface of the lens holder 7 at a position deviated from its rotation axis, and the receiving screw 19A is attached to the receiving screw 19B.
Similarly, the thread is formed so that the vertical adjustment screw 20B described above is screwed in the optical axis direction. Therefore, when the adjusting screw 20B rotates, the lens holder 7 rotates in the direction perpendicular to the supporting member 15. The lens holder 7 is provided with an aiming hole 7B on the front right side for looking obliquely from the front, and an aiming hole 7C is provided on the front left side so as to be parallel to the optical axis direction, and can be seen from the aiming hole 7C. A reflection mirror 7D for obliquely reflecting the field of view so that it can be seen through the sighting hole 7B is attached. 7E
Is a lens supported by the lens holder 7.

A light receiving substrate 24 and a light receiving shield case 25 are attached to the back side of the lens holder 7 with screws 26 and 27. Light receiving amount adjusting knobs 28, 29 are attached to both sides of the lens holder 7, and light receiving amount adjusting knobs 28, 29 are attached.
Reference numeral 9 adjusts the amount of received light by changing the photoelectric conversion voltage of the photoelectric conversion circuit. The received light amount adjustment knob 28 performs a rough adjustment, and the received light amount adjustment knob 28 performs a fine adjustment.

An embodiment of the visual confirmation structure of the indicator lamp according to the present invention will be described below with reference to FIGS. First, the main body 3
On the printed circuit board 11 housed in the transparent circuit cover 14 on the side, a light emitting diode 101 for display is mounted so as to emit light forward, as shown in FIGS. A part of the transparent circuit cover 14 facing the light emitting diode 101 is provided with a light emitting diode (LED).
The spectroscope 14a having a wedge-shaped side cross section is integrally formed so that the emitted light of the light emitting diode 101 is directly transmitted to be directed toward the projector, and the emitted light of the light emitting diode 101 is refracted at a substantially right angle and directed downward. ing.

Further, at the position of the cover 2 where the light emitting diode 101 and the spectroscope 14a face each other, an opening 2B is provided so that the spectroscope 14a is horizontally exposed to the outside as shown in FIGS. Has been formed. The upper wall portion 2C and the lower wall portion 2D forming the opening 2B are formed so as to be inclined so as not to project from the front surface of the cover 2 even if the spectroscope 14a is exposed to the outside, and the lower wall portion is further formed. Two
The wall portion 2E below D is formed to be inclined rearward.

The window 2A of the cover 2 is vertical, the front surface below the window 2A is substantially flush with the wall 2E, and
The angle abc between the surface of the lower wall portion 2D and the horizontal plane bc and the angle acb between the wall portion 2E below and the horizontal plane bc are, for example, 70.
It is about 80 ° to 80 °. FIG. 5 shows a state in which such a cover 2 is assembled to the main body 3 and installed at a high place. In such a configuration, when the light emitting diode 101 is turned on and the light emitted from the light emitting diode 101 is refracted downward at a substantially right angle by the spectroscope 14a, the position of the horizontal plane when the tip of the spectroscope 14a slightly projects the opening 2B. It can be seen at a position farther than b, and the tip of the spectroscope 14a has an opening 2
As B is projected, the visible position becomes closer, and when projected to the surface of the wall portion 2E, it can be viewed even at the position c, and therefore, it can be viewed even directly below.

In the above embodiment, the spectroscope 14a is integrally formed by a part of the transparent circuit cover 14, and the spectroscope 14a refracts the light emitted from the light emitting diode 101 at a substantially right angle and directs it downward. However, instead, as shown in FIG. 7, a part 14b of the circuit cover 14 may be formed so as to project so that the light emitting diode 101 projects forward. In addition, as shown in FIG.
Alternatively, the circuit cover 14 may not be transparent in this case. Further, in the case shown in FIGS. 7 and 8, a reflection plate is provided on the upper wall portion 2C forming the opening 2B and the surfaces on both sides of the upper wall portion 2C, or aluminum vapor deposition is performed so that the reflection surface reflects downward. If it is set, it will be easier to see.

Further, the spectroscope 14a is not limited to the above-mentioned wedge shape as shown in FIG.
As shown in (b), the shape for transmission and the shape for refraction may be separately formed, and as shown in FIG. 10, the one having a trapezoidal side cross section may be used. FIG. 10 shows a spectroscope 1 used for the light projector 10a and the light receiver 20a shown in FIG.
16 and 126, both spectroscopes 116 and 126 are formed of, for example, a polycarbonate resin or an acrylic resin so that the side cross section becomes trapezoidal. Face AD and Face D
Both C and the surface DC and the surface BC are formed at right angles, and the light emitting elements 115 and 125 are arranged on the surface AD side of the spectroscopes 116 and 126. The angle between the surface AD and the surface AB is determined by the incident angle of the light from the light emitting elements 115 and 125 and the spectroscopes 116 and 1.
26 corresponding to the critical angle of the light emitting elements 115, 125
Light is refracted in the direction of the surface DC, that is, downward (Snell's law).

In FIG. 11, a light emitting element 111 and a lens 112 for smoke detection, a light receiving element 211 and a lens 122 are respectively provided in a light projector 110a and a light receiver 120a.
Is provided, and the light emitting element 111 and the light receiving element 121 detect smoke in the near infrared region, for example. The light emitter 110a and the light receiver 120a are further provided with a light emitting element 11 in the visible light region which is used for both optical axis adjustment and alarm display (and normal monitoring display).
Reference numerals 5 and 125 are attached in parallel to the respective optical axes of the smoke detecting light emitting element 111 and the light receiving element 121.

Then, as shown in FIG. 10, the light emitted from the light emitting elements 115 and 125 respectively is directly transmitted and directed toward the light receiver 120a and the light projector 110a.
Spectroscopes 116 and 126 for refracting the light emitted from the light emitting elements 115 and 125 at right angles and directing the light downward are arranged. In such a configuration, the light projector 110a and the light receiver 120a are installed so as to be horizontally opposed to each other at a predetermined distance in a high place such as a ceiling, and the light attenuation due to smoke between them is detected to detect a fire. To do. In this case, the light emitting elements 115 and 125 blink at a predetermined cycle during normal monitoring (normal monitoring display), and continue to light up when smoke of a predetermined density or higher is detected (report display), or at a predetermined density. It is controlled so as to blink or light only when the above smoke is detected, and this smoke detector is triggered by pseudo smoke to blink or light, but each horizontal light of the light emitting elements 115 and 125 is a spectroscope. Since the light is refracted downward by 116 and 126, it is possible to confirm that the smoke sensor has issued an alarm, and it is possible to check whether the smoke sensor is normal or not.

Further, at the time of installation or maintenance, the light emitting element 12 in which the service person has passed through the spectroscope 126 on the side of the light receiver 120a from the direction of the light projector 110a in a dark place.
It is possible to confirm whether or not the optical axis of the light receiver 120a is aligned by visually checking the light of No. 5, and similarly, the spectroscope 11 on the side of the projector 110a from the direction of the light receiver 120a.
By visually confirming the light of the light emitting element 115 that has passed through 6, it is possible to confirm whether or not the optical axis of the light projector 110a is aligned.

Therefore, according to the above embodiment, since the light emitting elements 115 and 125 are used both for the optical axis adjustment of the light projector 110a and the light receiver 120a and for the alarm display (and the normal monitoring display), the number of parts is reduced. It is possible to adjust each optical axis of the light emitter and the light receiver with a reduced cost and a reduced structure, and to issue a warning display and a normal monitoring display to the light emitter 110a and the light receiver 120a.
It can be seen right under.

These visible indicators can be applied not only to the optical axis adjustment, to the one that is turned on at the time of alarming and the normal monitoring, but also to the obstacle lights to be turned on when a failure occurs. . Also, it goes without saying that these indicator lights may be provided separately for each function.

[0029]

As described above, according to the present invention, there is provided a visual indicator structure for an indicator lamp including an indicator lamp arranged so as to emit light in a horizontal direction and a casing having a substantially vertical wall portion. In the above, the opening for forming the tip of the indicator lamp in the wall is arranged so as to project in the horizontal direction, and the first part of the wall below the opening is prevented so that the tip of the indicator lamp does not protrude from the entire surface of the wall. 1
Since the surface of is formed so as to be depressed toward the inside of the housing, and the second surface of the lower wall of the first surface is formed so as to be inclined rearward, it is mounted at a high place, The indicator lamp that emits light in the horizontal direction can be easily viewed from below without protruding horizontally from the vertical surface of the housing.

[Brief description of drawings]

FIG. 1 is a side view showing a cover of a photodetector of a photoelectric separation type smoke detector as one embodiment of the present invention.

FIG. 2 is a side view showing a light receiver main body.

FIG. 3 is a side view showing a state in which a cover is attached to the light receiver main body.

FIG. 4 is a side sectional view showing an enlarged main part A of FIG.

FIG. 5 is an explanatory diagram showing an appearance of the light receiver and a state of being visually recognized from below.

FIG. 6 is an exploded perspective view showing a light receiver.

FIG. 7 is a side view showing an essential part of the second embodiment.

FIG. 8 is a side view showing an essential part of the third embodiment.

FIG. 9 is a side view showing another example of the spectroscope.

FIG. 10 is a side view showing still another example of the spectroscope.

FIG. 11 is an explanatory diagram showing a state in which optical axis adjustment and fire detection display are performed.

[Explanation of symbols]

 1: Light receiver 2: Cover 2A: Window 2B: Opening 2C: Third wall part 2D: First wall part 2E: Second wall part 3: Light receiver main body 4: Cover stop wire 5: Fixing metal part 6: Cover stopper 7: Lens holder 7A: Locking piece 7B, 7C: Aiming hole 7D: Reflecting mirror 7E: Lens 8: Mounting plate 8A: Locking piece 9: Base 9A: Fitting hole 9B: Shaft hole 9C: Locking Holes 9D and 9E: Flange portion 10: Shield case 11: Printed circuit board 12: Power supply board 13: Insulation sheet for light receiving board 14, 14b: Circuit cover 14a, 116, 126: Spectrometer 15: Support member 15A: Shaft hole 15B, 15C, 15E: Locking hole 15D: Fitting hole 16, 23: Coil spring 17: Separator 17A: Hole 18: Mounting screw 19A, 19B: Receiving screw 20A, 20B: Adjusting screw 21, 2 , 26, 27: screw 24: light receiving substrate 25: light receiving shield case 28, 29: light receiving amount adjusting knob 101, 115, 125: visible light emitting diode 110a: light projector 111: near infrared light emitting element 112, 122: lens 120a: light receiving Device 121: Near infrared light receiving element

Claims (7)

[Claims] 1. A visual confirmation structure of an indicator lamp, comprising: an indicator lamp arranged to emit light in a horizontal direction; and a casing having a substantially vertical wall portion, wherein the indicator lamp is provided on the wall portion. A front surface of the wall portion below the opening so that the front end of the indicator lamp does not protrude from the entire surface of the wall portion. It is formed so as to be recessed inwardly of the housing, and further, the second wall of the lower wall portion of the first surface is formed.
The visual confirmation structure of the indicator light, wherein the surface of the display lamp is formed so as to be inclined rearward. 2. The visual confirmation structure for a display lamp according to claim 1, wherein the display lamp transmits a light emitting element arranged to emit light in a horizontal direction and the light emitted from the light emitting element to the front as it is. A visual confirmation structure of an indicator light, which is characterized by comprising an optical member that is bent downward together with the optical member. 3. The indicator light visual recognition structure according to claim 2, wherein the optical member is integrally formed with a transparent cover for accommodating a substrate on which the light emitting element is mounted. Visual structure of. 4. The visual recognition structure for an indicator lamp according to claim 1, wherein the indicator lamp includes a light emitting element arranged so as to emit light in a horizontal direction, and accommodates a substrate on which the light emitting element is mounted. The visible structure of the indicator light, wherein a part of the transparent cover is formed so as to cover the tip of the light emitting element protruding from the surface of the wall portion. 5. The indicator light visual recognition structure according to claim 1, wherein the indicator light is composed only of light emitting elements arranged so as to emit light in a horizontal direction. Visual structure. 6. The visual recognition structure for an indicator light according to claim 4 or 5, wherein the third surface of the upper wall portion of the opening is formed so as to be inclined so as to be recessed inside the housing, and the third surface is formed.
A structure for visually confirming the indicator light, wherein a member for reflecting the light of the indicator light downward is provided on the surface of the. 7. The structure for visually confirming an indicator lamp according to claim 1, wherein the indicator lamp separates the projector and the receiver from each other and arranges them at a high place, and detects the attenuation due to smoke between them. In the photoelectric separation type smoke detector that detects a fire by adjusting the optical axis of the projector and the receiver by the light emitted in the horizontal direction, the fire detection state is displayed by the light emitted downward. The visual confirmation structure of the indicator light.