JP7309106B2 - fire detector - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire sensor that is fixed to an installation surface such as a ceiling surface of a building and detects the occurrence of fire.

A fire sensor that detects the occurrence of fire is fixed to an installation surface such as a ceiling surface of a building. Fire sensors include, for example, a fire sensor having a heat detection unit that detects heat from a fire. In addition, fire sensors that detect smoke, fire sensors that detect gas, and fire sensors that combine these functions are known.

A fire sensor is sometimes provided with a display unit that indicates an operating state such as a fire alarm with light. A light-emitting diode (LED), for example, is used as a light-emitting section that constitutes the display section of the fire sensor. The light emitting part is provided inside the main body of the fire sensor, and the light is guided to the outside by a light guide or the like. As such a fire sensor, for example, there is one disclosed in Patent Document 1.

JP 2006-215865 A

The fire sensor of Patent Literature 1 is a closed type, and by providing a light guiding portion covering substantially the entire housing, light can be visually recognized from a wide range. However, there are fire detectors, such as fire detectors with exposed thermistors, where it is difficult to provide a light guide over the entire housing. Even in such a case, a fire sensor is desired in which the light of the display section is easily visible.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fire sensor capable of improving the visibility of a display unit.

In order to solve the above-described problems, a fire sensor according to the present invention includes a detection portion that detects heat, and a body portion that is installed on an installation surface and holds the detection portion so as to be exposed to the side facing the installation surface. a guard portion provided around the detection portion to protect the detection portion; and a display mechanism for performing display by light , wherein the guard portion extends from the main body portion in a direction away from the installation surface. a plurality of extending side pillars; and an outer shell supported by ends of the plurality of side pillars opposite to the main body. The display mechanism has an opening radially inward, and the display mechanism is arranged in a region surrounding the detection unit, which is a region at least partially covered and protected by the outer shell part of the guard part, and the light wherein at least a part of the display by the light of the planar light visible portion is visible through the outer portion of the guard portion from the side facing the installation surface, The main body has a recess that is recessed toward the inside of the main body in a region covered and protected by the outer shell of the guard, and the recess is located on the installation surface in the height direction in the installed state. and a side surface portion rising from the peripheral edge of the bottom surface portion so as to surround the bottom surface portion and rising away from the installation surface in the height direction in the installed state. , the visible planar light portion constituting the display mechanism is arranged, the light from the visible planar light portion causes the bottom portion to emit light, and the bottom portion emits light through the opening of the outer shell portion; visible .

Further, the fire sensor according to the present invention includes a detection unit that detects heat, a main body that is installed on an installation surface and holds the detection unit so that it is exposed to the side facing the installation surface, and a main unit that holds the detection unit. A guard portion provided on the periphery to protect the detection portion, and a display mechanism for performing display by light, wherein the guard portion includes a plurality of side posts extending from the main body portion in a direction away from the installation surface. and an outer shell portion supported by the ends of the plurality of side pillars opposite to the main body portion, wherein the outer shell extends radially inward when viewed from the side facing the installation surface. The display mechanism has an opening, and the display mechanism has a planar visible light portion that is arranged in a region at least partly covered and protected by the outer shell portion of the guard portion for displaying with the light, At least a portion of the planar light visible portion is exposed without overlapping with the outer shell portion of the guard portion in a front view viewed from the side facing the installation surface, and the main body portion is the outer shell portion of the guard portion. In the area covered and protected by the main body, there is a recess that is recessed on the inner side of the main body, and the recess is composed of a bottom portion located on the installation surface side in the height direction in the installed state, and the bottom surface portion and a side surface portion rising from the peripheral edge of the bottom surface portion to the side away from the installation surface in the height direction in the installed state so as to surround the planar light visible that constitutes the display mechanism. The light from the planar light visible portion causes the bottom portion to emit light, and the light emitted from the bottom portion is viewed through the opening of the outer shell portion.

Further, in the fire sensor according to the present invention, the planar visible light portion constituting the display mechanism is arranged on the bottom portion of the concave portion. Further, in the fire sensor according to the present invention, the display mechanism has a light emitting portion within a region covered and protected by the guard portion, and the light from the emitting portion is emitted from the guard portion. The surface facing the installation surface is irradiated.

According to the fire sensor of the present invention, it is possible to improve the visibility of the display section.

It is the perspective view seen from the front side of the fire sensor in this embodiment. It is a front view of a fire sensor. 3 is a cross-sectional view of the front side from the front part in the AA cross section of FIG. 2. FIG. FIG. 4 is a front view of the fire sensor showing a portion illuminated by the reflecting portion when the display portion is illuminated; FIG. 11 is an explanatory cross-sectional view of another form of display unit;

An embodiment of the present invention will be described in detail with reference to the drawings. The fire sensor 10 of this embodiment is fixed to an installation surface such as a ceiling of a building and detects heat generated by a fire. FIG. 1 shows a front perspective view of a fire sensor 10 according to this embodiment, and FIG. 2 shows a front view of the fire sensor 10. As shown in FIG. As shown in these figures, the fire sensor 10 of this embodiment has a housing 20 fixed to an installation surface and a heat detection section 21 for detecting heat generated by a fire.

The housing 20 has a main body 30 that houses a substrate or the like on which various components are arranged for detecting fire and transmitting a fire detection signal. The body portion 30 has a substantially cylindrical rear portion 30a and a substantially disk-shaped front portion 30b having a larger diameter than the rear portion 30a. By fixing the housing 20 to the installation surface, the back surface portion 30a is embedded in the back side of the installation surface, and only the front side of the front surface portion 30b is exposed.

The housing 20 is made of a resin material such as plastic. However, the housing 20 may be made of other materials.

The heat detection part 21 is provided in a shape of protruding in the height direction from the main body part 30 of the housing 20 . The heat detector 21 is composed of a thermistor, and can detect heat at its tip.

A guard portion for protecting the heat detection portion 21 is provided in the body portion 30 . The guard portion includes a side pillar portion 31 rising in the height direction from the front portion 30b, an outer shell portion 32 supported by the side pillar portion 31, a guard supporting portion 33 extending from the outer shell portion 32 toward the center, and a guard supporting portion. and a central guard portion 34 supported on portion 33 .

A plurality of side post portions 31 are formed in the circumferential direction and arranged at equal intervals in the circumferential direction. The side pillars 31 support the outer shell 32 at the top. The outer shell part 32 has an annular shape with a constant width, and is spaced apart from the main body part 30 in the height direction.

Arm-shaped guard support portions 33 are provided at three locations in the circumferential direction of the outer shell portion 32, rising from the outer shell portion 32 and extending toward the center thereof. The guard support portion 33 supports the central guard portion 34 at its central portion. The central guard portion 34 has a ring shape with a small diameter. The heat detection part 21 is arranged in the central part of the main body part 30 , and the tip thereof is arranged at a position lower than the central guard part 34 , so that it is covered with the central guard part 34 .

The body portion 30 has two display portions 22 at positions on the outer peripheral side of the central guard portion 34 . The two display portions 22 are arranged at the circumferential positions of 3 o'clock and 9 o'clock in FIG. A light-emitting portion (not shown) composed of an LED is provided in the main body portion 30, and the display portion 22 is a light guide that guides the light from the light-emitting portion to the outside. The display section 22 can be illuminated by the emission of light from the light emitting section.

The front face portion 30b of the main body portion 30 has an identification label portion 50 on the front face on the outer peripheral side of the concave portion 40 and at the 3 o'clock position in the circumferential direction in FIG. The identification label portion 50 is formed of a sticker or the like that can be attached to the main body portion 30 . A mark corresponding to the type of the fire sensor 10 is printed on the identification label portion 50 . Fire detectors are classified into multiple types according to the fire detection method, such as the differential spot type and constant temperature spot type that detect heat, and the photoelectric spot type and photoelectric separation type that detect smoke. . In addition, fire detectors are classified into different types according to functions such as the presence or absence of a test function, fire detection sensitivity, and the like. The mark of the identification label portion 50 has a different design for each of these types. The fire sensor 10 of this embodiment is of the differential spot type and is classified into a type with a test function, so a mark corresponding to this type is attached. By attaching a unique mark to the fire detector according to the type, the type of fire detector can be easily identified at the time of installation or maintenance, and work can be carried out quickly and reliably. ing.

FIG. 3 shows a sectional view of the front side from the front portion 30b in the AA section of FIG. As shown in this figure, a recess 40 is formed in the central portion of the front portion 30b. The concave portion 40 has a bottom portion 43 facing in the height direction and side portions 41 rising from the bottom portion 43 . The two display portions 22 are arranged in the recess 40 . Moreover, the display portion 22 has a height greater than the depth of the recess 40 and slightly protrudes from the recess 40 in the height direction.

A side reflecting portion 42 is provided on the side portion 41 of the recess 40 . The side reflecting portion 42 is formed of a thin-film seal or the like having a reflecting material that reflects light. As shown in FIG. 2 , the side reflecting portion 42 is provided over a portion of the side portion 41 facing the display portion 22 and a region in the vicinity thereof.

As shown in FIG. 3 , a facing surface reflecting portion 36 is provided on a facing surface portion 35 facing the body portion 30 of the outer shell portion 32 constituting the guard portion. A bottom reflecting portion 44 is provided on the bottom portion 43 of the concave portion 40 facing the opposing surface reflecting portion 36 . The bottom reflecting portion 36 is arranged inside a circular area having a central position where the heat detecting portion 21 is exposed on the main body portion 30 and a radius extending from the central position to the display portion 22 . The opposing surface reflecting portion 36 and the bottom reflecting portion 44 can be formed of a thin-film seal or the like having a reflecting material that reflects light, like the side reflecting portion 42 .

The aforementioned identification label portion 50 provided on the body portion 30 has a reflecting portion 51 that reflects light. The reflective portion 51 is formed by providing the identification label portion 50 with a reflective material. The identification label section 50 also has a luminous section 52 . The luminous portion 52 is formed by coating or including a luminous paint or the like in the identification label portion 50 .

Of the light from the display unit 22 , the light directed toward the side surface portion 41 is reflected by the side surface reflection portion 42 like the light ray L1 shown in FIG. can proceed without Further, among the light from the display unit 22, the light directed toward the outer shell portion 32 is reflected by the opposing surface reflecting portion 36 of the outer shell portion 32 and further reflected by the bottom surface portion 43 of the main body portion 30, like the light ray L2 shown in FIG. By being reflected by the bottom reflecting portion 44 provided at the bottom, the light can advance at an angle in the height direction and the horizontal direction of the main body portion 30 .

Of the light from the display section 22, part of the light directed toward the outer circumference of the main body section 30 reaches the identification label section 50 like the light ray L3 shown in FIG. reflect. Thereby, the identification label portion 50 can be illuminated by the light from the display portion 22 .

FIG. 4 shows a front view of the fire sensor 10 with the display section 22 illuminated. As shown in this figure, when the display section 22 is illuminated, not only the display section 22 but also the portion of the side surface portion 41 provided with the side reflection portion 42 and the portion of the bottom surface portion 43 provided with the bottom reflection portion 44 are illuminated. , and the identification label portion 50 are illuminated by the reflected light. Since the light reflected by the side reflecting portion 42 and the bottom reflecting portion 44 also travels at an angle in the horizontal direction of the main body portion 30, when the fire sensor 10 is installed on the ceiling surface of a building, the fire sensor It can be easily visually recognized even from obliquely below 10 that it is shining. Therefore, the display by the display unit 22 can be viewed from a wide range.

In addition, the identification label portion 50 is illuminated by the light from the display portion 22, so that the display portion 22 is illuminated at the time of installation or maintenance of the fire sensor 10, thereby improving the visibility of the identification label portion 50 and increasing the visibility of the fire sensor. The 10 types are easily visible. In particular, when the fire sensor 10 is installed in a dark place, the work can be facilitated by the illumination of the identification label portion 50 .

Further, since the identification label portion 50 has the luminous portion 52 that accumulates light by receiving the light from the display portion 22, it can continue to shine for a while after the light of the display portion 22 is extinguished. As a result, when the fire sensor 10 is installed in a dark place, etc., the identification label portion 50 can be visually recognized more reliably, and workability can be further improved.

Although the embodiment of the present invention has been described above, the application of the present invention is not limited to this embodiment, and can be applied in various ways within the scope of its technical ideas.

Although the fire detector 10 in the embodiment described above is a compact embedded type, the present invention can be applied to other types of fire detectors. For example, the present invention can also be applied to an exposed-type fire sensor that is fixed to an installation surface via a mounting base. Further, the fire sensor 10 of the above-described embodiment detects fire by detecting heat, but it may be a fire sensor that detects smoke or gas, or a combination thereof, regardless of the type.

In addition, in the body part 30, the reflecting part can be arranged arbitrarily other than the above-described embodiment as long as it can reflect the light from the display part 22. FIG. For example, a reflective portion may be provided on the side pillar portion 31 rising from the main body portion 30 . In addition, of the central guard portion 34 that constitutes the guard portion, a reflecting portion may be provided on the surface facing the main body portion 30 side. Further, the position and number of the display section 22 on the main body section 30 can be arbitrarily set, and the reflecting section can be provided at a position where the light from the display section 22 can be reflected accordingly.

In the above-described embodiment, the side surface reflecting portion 42 is provided on the side portion 41, the facing surface reflecting portion 36 is provided on the outer shell portion 32, the bottom surface reflecting portion 44 is provided on the bottom surface portion 43, and the identification label portion 50 is provided with the reflecting portion. 51 is provided, only the side reflecting portion 42, or only the opposing surface reflecting portion 36 and the bottom reflecting portion 44, or only the reflecting portion 51 of the identification label portion 50 may be provided, or two of these reflecting portions may be provided. may be provided.

Further, in the above-described embodiment, each reflective portion is provided on a sticker attached to the body portion 30, but the body portion 30 itself may have a reflective material, or the body portion 30 may have a reflective material. The reflecting portion may be provided by other methods such as applying paint.

Further, in the above-described embodiment, the bottom reflecting portion 44 is provided on the bottom portion 43 of the recess 40, but each member on the front surface of the fire sensor 10, for example, the side pillar portion 31, the outer shell portion 32, the guard support portion 33 Alternatively, the central guard portion 34 may be made of a transparent material so that the light emitted from the light-emitting portion in the body portion 30 can pass therethrough so that the front side of the fire sensor 10 is illuminated.

In the above-described embodiment, the reflected light from the display unit 22 is incident on the bottom reflecting unit 44 and reflected by the bottom reflecting unit 44. However, the light from the display unit 22 is reflected from the bottom surface. The light may be directly incident on the portion 44 . In the above-described embodiment, the display section 22 functions as a front-side light guide section that guides light toward the front side of the main body and a side-side light guide section that guides light toward the side reflection section 42 . FIG. 5 shows an explanatory cross-sectional view of another form of display unit 22 . As shown in this figure, by providing light guide paths with different refractive indices inside the display section 22, light can be directed directly toward the bottom section 43 side. The display section 22 is provided with a curved bottom-side light guide section 22c whose both ends face the light emitting section 23 side and the bottom reflecting section 44 side, respectively, as a light guide path. Part of the light from the light emitting portion 23 is emitted toward the bottom surface portion 43 by the bottom surface side light guide portion 22 c and reflected by the bottom surface reflecting portion 44 . The light is emitted directly to the front side and the side side without passing through the light guide path. Therefore, the front surface of the display unit 22 is the front light guide portion 22a, and the side surface of the display unit 22 is the side light guide portion 22b. By providing the bottom-side light guide portion 22 c that guides light toward the bottom reflecting portion 44 in this manner, the light from the display portion 22 can be directed directly toward the bottom reflecting portion 44 .

REFERENCE SIGNS LIST 10 fire sensor 20 housing 21 heat detection unit 22 display unit 30 body unit 30a back surface unit 30b front surface unit 31 side column unit 32 outer shell unit 33 guard support unit 34 central guard unit 35 opposing surface unit 36 opposing surface reflecting unit 40 recess 41 side surface Part 42 Side Reflecting Part 43 Bottom Part 44 Bottom Reflecting Part 50 Identification Label Part 51 Reflecting Part 52 Luminescent Part

Claims (4)

a detection unit that detects heat;
a main body installed on an installation surface and holding the detection unit while exposing it to the side facing the installation surface;
a guard section provided around the detection section and protecting the detection section;
a display mechanism for displaying light,
The guard section includes a plurality of side pillars extending from the main body in a direction away from the installation surface, an outer shell supported by ends of the plurality of side pillars opposite to the main body, wherein the outer shell portion has an opening radially inward when viewed from the side facing the installation surface,
The display mechanism has a planar light visible portion that is an area at least partially covered and protected by the outer shell portion of the guard portion and that is arranged in an area around the detection portion and performs display by the light. have
At least a part of the display by the light of the planar light visible portion is visible through the outer shell portion of the guard portion from the side facing the installation surface,
The main body has a recess recessed toward the inside of the main body in a region covered and protected by the outer shell of the guard,
The concave portion has a bottom portion located on the installation surface side in the height direction in the installed state, and a peripheral edge of the bottom portion so as to surround the bottom portion and rises away from the installation surface in the height direction in the installed state. a side portion;
The visible planar light portion constituting the display mechanism is disposed on the side surface of the concave portion, the light from the visible planar light portion causes the bottom portion to emit light, and the bottom portion emits light from the bottom portion. A fire detector viewed through said opening in the shell . a detection unit that detects heat;
a main body installed on an installation surface and holding the detection unit while exposing it to the side facing the installation surface;
a guard section provided around the detection section and protecting the detection section;
a display mechanism for displaying light,
The guard section includes a plurality of side pillars extending from the main body in a direction away from the installation surface, an outer shell supported by ends of the plurality of side pillars opposite to the main body, wherein the outer shell portion has an opening radially inward when viewed from the side facing the installation surface,
The display mechanism has a planar light visible part that is arranged in a region at least partially covered and protected by the outer shell part of the guard part and performs display with the light,
At least a part of the planar light visible part is exposed without overlapping with the outer shell part of the guard part in a front view viewed from the side facing the installation surface,
The main body has a recess recessed toward the inside of the main body in a region covered and protected by the outer shell of the guard,
The concave portion has a bottom portion located on the installation surface side in the height direction in the installed state, and a peripheral edge of the bottom portion so as to surround the bottom portion and rises away from the installation surface in the height direction in the installed state. a side portion;
The visible planar light portion constituting the display mechanism is arranged on the side surface of the concave portion. A fire detector visible through said opening in the part . 3. The fire sensor according to claim 1, wherein the planar light-visible portion constituting the display mechanism is disposed on the bottom surface of the recess. The display mechanism has a light emitting portion within a region covered and protected by the guard portion, and the light emitted from the emitting portion is irradiated to a surface of the guard portion that faces the installation surface. A fire sensor according to claim 3.

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