JP7002975B2 - Fire detector - Google Patents

Description

The present invention relates to a fire detector that is fixed to an installation surface such as a ceiling surface of a building and detects the occurrence of a fire.

The fire detector that detects the occurrence of a fire is fixed to the installation surface such as the ceiling surface of the building. Examples of the fire detector include a fire detector having a heat detection unit that detects heat due to a fire. In addition to this, a fire detector that detects smoke, a fire detector that detects gas, and a fire detector that combines these functions are known.

The fire detector may be provided with a display unit that indicates an operating state such as a fire alarm by light. As a light emitting unit constituting the display unit of the fire detector, for example, a light emitting diode (LED) or the like is used. The light emitting unit is provided inside the main body of the fire detector and is guided to the outside by a light guide or the like. Examples of such a fire detector include those listed in Patent Document 1.

Japanese Unexamined Patent Publication No. 2006-215865

The fire detector of Patent Document 1 is a closed type, and by providing a light guide portion extending over substantially the entire housing thereof, light can be visually recognized from a wide range. However, there are some fire detectors, such as a fire detector with an exposed thermistor, in which it is difficult to provide a light guide portion over the entire housing. Even in such a case, a fire detector that allows the light of the display unit to reach a wide range is desired.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a fire detector capable of allowing the light of a display unit to reach a wide range.

In order to solve the above-mentioned problems, the fire detector according to the first aspect of the present invention has a main body portion provided with a detection unit for detecting the occurrence of a fire, and a display unit provided on the main body portion for displaying with light . In the detector
The main body portion has a reflecting portion that reflects the light.
The detection unit is exposed from the main body unit and is exposed.
The reflective portion of the main body portion has a center position at an insertion position where the detection portion is inserted and exposed, and the entire circumference of a certain radial range in a circular region having a radius from the center position to the display portion. It is characterized by having a planar bottom surface reflecting portion that extends over the area and reflects the light .

According to the first aspect of the present invention, the light from the display unit is reflected by the reflecting unit, and a place other than the display unit can be illuminated in the main body unit, so that the reflected light can be directed in various directions.

Further, in the fire detector according to the second aspect of the present invention, the main body portion has a side surface portion that faces the light emitting portion in the horizontal direction when the installation surface is a ceiling surface, and the reflection mechanism has a reflection mechanism. The side surface portion is characterized by having a side surface reflecting portion that reflects the light toward the bottom surface reflecting portion .

According to the second aspect of the present invention, since the light is reflected on the side surface portion that faces the display unit in the horizontal direction, the reflected light can be directed in a direction different from the light directly directed from the display unit.

Further, in the fire detector according to the third aspect of the present invention, the main body portion has a guard portion that covers the detection portion, and the reflection mechanism is provided on the surface of the guard portion facing the main body portion. It is configured to have a reflecting portion that reflects the light toward the main body portion .

According to the invention of claim 4, the light from the display unit is reflected by the reflection unit facing the height direction of the main body unit, and the reflected light can be directed in a direction different from the light directly directed from the display unit. ..

Furthermore, in the fire detector according to the invention of claim 4 , the light emitting unit has a light emitting unit and a light guide unit.
The light guide unit includes a front side light guide unit that guides light from the light emitting unit to the front side of the main body portion, and a side surface side that guides light from the light emitting unit toward the side reflection unit. It is characterized by being composed of a light guide unit and a bottom surface side light guide unit that guides light from the light emitting unit toward the bottom surface reflecting unit.

According to the invention of claim 5, since the light from the light emitting unit can be guided to each reflecting unit by the light guide unit and the light can be reflected in various directions, the light of the display unit can be reflected from a wide range. Can be made visible.

In the fire detector according to the fifth aspect of the present invention, the main body portion has an identification label portion indicating the type of the fire detector, and the identification label portion is on or near the surface facing the display unit. It is provided on the surface and is characterized in that at least a part thereof is the reflecting portion.

According to the invention of claim 6, the identification label portion can be illuminated by the light from the display unit, and the visibility of the identification label portion can be improved.

Further, the fire detector according to the sixth aspect of the present invention is characterized in that the identification label portion is at least a part of a phosphorescent portion.

According to the invention of claim 7, since the identification label portion can be maintained in a lit state even after the light of the display portion is extinguished, the visibility of the identification label portion can be further improved.

According to the fire detector according to the present invention, the light from the light emitting portion can be reflected to direct the reflected light in various directions, so that the light from the light emitting portion can reach a wide range and be visually recognized. It is possible to improve the sex .

It is a perspective view seen from the front side of the fire detector in this embodiment. It is a front view of a fire detector. It is sectional drawing of the front side from the front part in the cross section of AA of FIG. It is a front view of the fire detector which showed the part which shines by the reflection part when the display part shines. It is explanatory cross-sectional view of the display part of another form.

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

The housing 20 has a main body portion 30 that houses a board or the like on which various parts for detecting a fire and transmitting a fire detection signal are arranged. The main body portion 30 has a substantially cylindrical back surface portion 30a and a substantially disk-shaped front surface portion 30b having a diameter larger than that of the back surface 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 any other material.

The heat detection unit 21 is provided so as to project in the height direction from the main body portion 30 of the housing 20. The heat detection unit 21 is composed of a thermistor and can detect heat at the tip portion.

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

A plurality of side pillar portions 31 are formed in the circumferential direction and are arranged at equal intervals in the circumferential direction. The side pillar portion 31 supports the outer shell portion 32 at the top. The outer shell portion 32 has an annular shape having a constant width, and is separated from the main body portion 30 in the height direction.

Arm-shaped guard support portions 33 that rise from the outer shell portion 32 and extend toward the center thereof are provided at three locations in the circumferential direction of the outer shell portion 32. The guard support portion 33 supports the central guard portion 34 in the central portion. The central guard portion 34 has an annular shape with a small diameter. The heat detection unit 21 is arranged in the central portion of the main body portion 30, and since the tip thereof is arranged at a position lower than the central guard portion 34, the heat detection portion 21 is covered by the central guard portion 34.

The main body portion 30 has two display portions 22 at positions on the outer peripheral side of the central guard portion 34. The two display units 22 are arranged at positions in the circumferential direction at 3 o'clock and 9 o'clock in FIG. A light emitting unit (not shown) made of an LED is provided in the main body portion 30, and the display unit 22 is a light guide body that guides the light from the light emitting unit to the outside. When the light emitting unit emits light, the display unit 22 can illuminate.

The front portion 30b of the main body portion 30 has an identification label portion 50 at the circumferential position at 3 o'clock in FIG. 2, which is the front surface on the outer peripheral side of the recess 40. 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 detector 10 is printed on the identification label unit 50. Fire detectors are classified into multiple types according to the fire detection method, such as differential spot type and constant temperature spot type that detect heat, and photoelectric spot type and photoelectric separation type that detect smoke. .. In addition, fire detectors are classified into different types in terms of functions such as the presence or absence of a test function and the sensitivity of fire detection. The mark of the identification label unit 50 has a different design for each of these types. Since the fire detector 10 of the present embodiment is a differential spot type and is classified into a type with a test function, a mark corresponding to this type is attached. By attaching a unique mark corresponding to such a type to the fire detector, the type of the fire detector can be easily identified at the time of installation or maintenance, and the work can be performed quickly and surely. ing.

FIG. 3 shows a cross-sectional view of the AA cross section of FIG. 2 on the front side of the front portion 30b. As shown in this figure, a recess 40 is formed in the central portion of the front portion 30b. The recess 40 has a bottom surface portion 43 facing in the height direction and a side surface portion 41 rising from the bottom surface portion 43. The two display units 22 are arranged in the recess 40. Further, the display unit 22 has a height larger 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 surface portion 41 of the recess 40. The side reflecting portion 42 is formed of a thin film-shaped seal or the like having a reflective material that reflects light. As shown in FIG. 2, the side reflection portion 42 is provided over a portion of the side surface portion 41 facing the display portion 22 and a region in the vicinity thereof.

As shown in FIG. 3, the facing surface reflecting portion 36 is provided on the facing surface portion 35, which is a surface of the outer shell portion 32 constituting the guard portion and facing the main body portion 30. Further, a bottom surface reflecting portion 44 is provided on the bottom surface portion 43 of the recess 40 facing the facing surface reflecting portion 36. The bottom surface reflecting portion 36 is arranged inside a circular region whose center position is the exposed location in the main body portion 30 of the heat detection portion 21 and whose radius is from this center position to the display portion 22. Like the side reflecting portion 42, the facing surface reflecting portion 36 and the bottom reflecting portion 44 can be formed of a thin film-like seal or the like having a reflective material that reflects light.

The above-mentioned identification label portion 50 provided on the main body portion 30 has a reflecting portion 51 that reflects light. The reflective portion 51 is formed by providing a reflective material on the identification label portion 50. The identification label unit 50 also has a phosphorescent unit 52. The phosphorescent portion 52 is formed by applying or impregnating the phosphorescent paint or the like on the identification label portion 50.

Of the light from the display unit 22, the light directed to the side surface portion 41 is reflected by the side surface reflecting portion 42 as shown by the light beam L1 shown in FIG. 3, so that the angle is set in the height direction and the horizontal direction of the main body portion 30. You can proceed without doing anything. Further, among the light from the display unit 22, the light directed to the outer shell portion 32 is reflected by the facing surface reflecting portion 36 of the outer shell portion 32 as shown by the light beam L2 shown in FIG. 3, and further, the bottom surface portion 43 of the main body portion 30. By reflecting light by the bottom surface reflecting portion 44 provided in the main body portion 30, it is possible to advance at an angle in the height direction and the horizontal direction of the main body portion 30.

Of the light from the display unit 22, a part of the light toward the outer peripheral side of the main body unit 30 reaches the identification label unit 50 as shown by the light beam L3 shown in FIG. reflect. As a result, the identification label unit 50 can be illuminated by the light from the display unit 22.

FIG. 4 shows a front view of the fire detector 10 in a state where the display unit 22 is shining. As shown in this figure, when the display unit 22 shines, not only the display unit 22 but also the portion provided with the side reflecting portion 42 of the side surface portion 41 and the portion provided with the bottom surface reflecting portion 44 of the bottom surface portion 43. , And the identification label portion 50 is in a state of being 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, the fire detector 10 is installed on the ceiling surface of the building. It can be easily visually recognized that the light is shining even from diagonally below 10. Therefore, the display by the display unit 22 can be visually recognized from a wide range.

Further, the identification label unit 50 illuminates by the light from the display unit 22, and the display unit 22 illuminates at the time of installation or maintenance of the fire detector 10, thereby improving the visibility of the identification label unit 50 and improving the visibility of the fire detector. The 10 types can be easily visually recognized. In particular, when the fire detector 10 is installed in a dark place, the identification label portion 50 illuminates, which facilitates the work.

Further, since the identification label unit 50 has a phosphorescent unit 52 that stores light by receiving light from the display unit 22, the identification label unit 50 can continue to shine for a while even after the light of the display unit 22 is extinguished. As a result, when the fire detector 10 is installed in a dark place, 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 the present embodiment and may be variously applied within the scope of the technical idea thereof.

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

Further, in the main body portion 30, the reflecting portion can be arbitrarily arranged in addition to the above-described embodiment as long as it is at a position where the light from the display unit 22 can be reflected. For example, a reflective portion may be provided on the side pillar portion 31 rising from the main body portion 30. Further, the reflective portion may be provided on the surface of the central guard portion 34 constituting the guard portion toward the main body portion 30 side. Further, the position and number of the display unit 22 in the main body portion 30 can be arbitrarily set, and the reflection unit can be provided at a position where the light from the display unit 22 can be reflected accordingly.

Further, in the above-described embodiment, the side surface reflecting portion 42 is provided on the side surface 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 reflecting portion is provided on the identification label portion 50. Although 51 is provided, only the side reflecting portion 42, only the facing 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 the seal attached to the main body portion 30, but the main body portion 30 itself may have a reflective material, or the main body portion 30 has a reflective material. The reflective portion may be provided by another method such as applying a paint.

Further, in the above-described embodiment, the bottom surface reflecting portion 44 is provided on the bottom surface portion 43 of the recess 40, but each member on the front surface of the fire detector 10, for example, the side pillar portion 31, the outer shell portion 32, and the guard support portion 33. The central guard portion 34 may be formed of a transparent material so that light from the light emitting portion in the main body portion 30 can be transmitted to illuminate the front side of the fire detector 10.

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

10 Fire detector 20 Housing 21 Heat detection part 22 Display part 30 Main body part 30a Back part 30b Front part 31 Side pillar part 32 Outer part 33 Guard support part 34 Central guard part 35 Facing surface part 36 Facing surface Reflecting part 40 Recessed part 41 Side surface Part 42 Side reflecting part 43 Bottom part 44 Bottom reflecting part 50 Identification label part 51 Reflecting part 52 Luminous part

Claims (6)

In a fire detector installed on an installation surface, which has a main body portion provided with a detection unit for detecting the occurrence of a fire and a light emitting portion provided in the main body portion to emit light.
The main body has a reflection mechanism that reflects the light.
The detection unit is exposed from the bottom surface of the main body unit toward the opposite side of the installation surface.
The reflection mechanism of the main body has a fixed diameter in a circular region having a center position of the insertion position where the detection unit is inserted and exposed on the bottom surface and a radius from the center position to the light emitting portion. A bottom surface that is provided so as to cover the entire circumference of the directional range and is formed in a surface shape that faces the same direction as the installation surface so as to reflect the light toward the outside of the front side opposite to the installation surface. A fire detector characterized by having a reflector . The main body portion has a side surface portion that faces the light emitting portion in the horizontal direction when the installation surface is a ceiling surface, and the reflection mechanism causes the light to be directed toward the bottom surface reflection portion on the side surface portion. The fire detector according to claim 1, further comprising a reflective side reflective portion . The main body portion has a guard portion that covers the detection portion, and the reflection mechanism is provided on a surface of the guard portion facing the main body portion to reflect the light toward the main body portion . The fire detector according to claim 1 or 2 , wherein the fire detector is provided. The light emitting unit has a light emitting unit and a light guide unit, and has a light emitting unit.
The light guide unit includes a front side light guide unit that guides light from the light emitting unit to the front side of the main body portion, and a side surface side that guides light from the light emitting unit toward the side reflection unit. The fire detector according to claim 2 , further comprising a light guide unit and a bottom surface side light guide unit that guides light from the light emitting unit toward the bottom surface reflecting unit. The main body portion has an identification label portion indicating the type of the fire detector on the front side of the main body portion , and at least a part of the identification label portion constitutes a part of the reflection mechanism and the light. The fire detector according to any one of claims 1 to 4 , wherein the light from the emitting unit is reflected toward the outside on the front side . The fire detector according to claim 5 , wherein the identification label unit is at least a part of a phosphorescent unit.

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