JP6681130B2 - Fire detector - Google Patents

Description

The present invention relates to a fire detector attached to a ceiling surface or the like, and more particularly, to a fire detector having a light emitting unit that emits light to confirm an operating state in which a warning is issued.
In the present specification and claims, the terms "upper" and "lower" indicating the directions, when the mounting surface is the ceiling surface of a building or the like, the ceiling surface side is "upper", the floor is The side is described as "bottom".

  The fire detector is provided with a confirmation light that displays the operation status when the alarm is issued. This confirmation light is used to identify the fire detector that is issuing a alarm among multiple fire detectors installed on the ceiling surface, or to confirm the operation during operation tests such as smoke test and heating test. Used for. Such confirmation lights are required to have excellent visibility from the outside.

  As a fire detector having a confirmation light with improved visibility, for example, in Patent Document 1, an indicator light has a predetermined shape around a center line passing through the top of the housing, and a predetermined shape around the center line. For example, there has been proposed an annular shape, a disk shape, a cylindrical shape, or a shape having a pattern formed continuously and regularly along a circle (see claims 1 and 2 of Patent Document 1).

JP, 2001-14570, A

In general, fire detectors, including those disclosed in Patent Document 1, have a substantially truncated cone or dome shape in which the outer shape of the fire detector is reduced downward when attached to the ceiling surface.
On the premise of such a shape, the fire detector disclosed in Patent Document 1 is provided with an indicator light (confirmation light), for example, in an annular shape on the outer peripheral surface.

  The fire detector needs to detect a physical quantity at the time of a fire, for example, smoke density, and to operate reliably. There is. Further, as for the confirmation light (indicator light), there is also one formed in an annular shape over the entire outer peripheral surface of the fire detector in order to improve the visibility as in Patent Document 1.

In recent years, it has been required to make buildings and indoor spaces stylish and improve their design, and fire detectors attached to the ceiling surface, etc. are required to function reliably in the event of a fire, but they are usually noticeable. It is better not to. Further, even if it is not possible to make it inconspicuous, it is desired that the shape is not only a function as much as possible but also a shape excellent in design that matches the interior space.
Further, the confirmation lamp is also required to be inconspicuous when it is not in the alarming state and have excellent visibility when it is in the alarming state.

  However, the conventional fire detector tends to emphasize only the function, and the idea of making the fire detector itself and the confirmation light stand out like the one in Patent Document 1, and matching with a stylish indoor space is possible. It was difficult.

  The present invention has been made to solve such a problem, and it is possible to improve the designability of the fire detector itself, and to provide a fire detector that can both improve the visibility and the designability of the alert state. It is intended to be provided.

(1) A fire detector according to the present invention is a fire detector that is attached to a mounting surface to detect a fire, and includes a main body that houses a detection unit that detects a fire, and a fire detector that is provided in the main body. It has a light emitting part that emits light when it becomes a report state,
The main body portion includes a housing having a tubular portion, the lower end surface of the main body portion is recessed upward, and the light emitting portion is provided in a ring shape on the periphery of the recessed portion. It is what

(2) Moreover, in the thing described in said (1), the said light-emitting part provided in the ring shape is equipped with the inclined surface part which inclines toward the slanting upper part inside the ring, It is characterized by the above-mentioned. is there.

(3) Moreover, in the thing of said (1) or (2), it has a base which attaches the said main-body part to a mounting surface, and this base has a cylindrical part which accommodates the said housing, and this cylindrical part. Is characterized in that it has an outwardly facing flange portion, and that the main body portion can be mounted in an embedded manner in a hole portion provided in the mounting surface.

(4) Further, in any one of the above (1) to (3), a thermistor is provided which extends from a recessed portion of the main body and senses temperature. is there.

  A fire detector according to the present invention has a main body that houses a detection unit that detects a fire, and a light emitting unit that is provided in the main unit and that emits light when a warning state occurs, and the main body is a cylinder. Since the lower end surface of the main body part is recessed upward and the light emitting part is provided in a ring shape at the peripheral edge of the recessed part It is possible to achieve both improvement in design and design.

It is a perspective view of the attachment state of the fire detector concerning one embodiment of the present invention. It is a side view in the mounting state of the fire detector shown in FIG. It is sectional drawing in the mounting state of the fire detector shown in FIG. It is a perspective view of the attachment state of the fire detector which concerns on other embodiment of this invention. It is a side view in the mounting state of the fire detector shown in FIG. It is sectional drawing in the mounting state of the fire detector shown in FIG.

[Embodiment 1]
As shown in FIGS. 1 to 3, the fire detector 1 according to the present embodiment is a fire detector 1 that is attached to a mounting surface 3 such as a ceiling surface in a room and detects a fire. Body 4 for accommodating a detection unit (not shown), a casing 5 that forms the outer shape of the body 4 and accommodates each device, and is provided in the casing 5 to detect a fire and report. It has a light emitting portion that emits light when it is in a state and a base 7 for mounting the housing 5 on the mounting surface 3. The light emitting unit of the present invention is composed of a light emitting element 11 and a ring-shaped portion of the light guide 13 as described later.

The casing 5 is composed of a bottomed cylindrical body including a bottom portion 5a and a tubular portion 5b, and when mounted on the ceiling surface, the bottom portion 5a is on the upper side and the opening is on the lower side.
A circuit board 9 on which various electric components are mounted and a detection unit (not shown) attached to the circuit board 9 to detect a fire are provided in the housing 5, and the circuit board 9 is in a warning state. A light emitting element 11 that emits light when the light is emitted is provided (see FIG. 3).
Since the light emitting element 11 emits light in the housing 5, it is preferable to form the housing 5 with a non-translucent member in order to prevent light from passing through the peripheral surface of the housing 5. However, when the housing 5 is covered with the base 7 as in the present embodiment, the base 7 may be formed of an opaque member.

The circuit board 9 is disposed in the housing 5 near the opening, and two light emitting elements 11 (see FIG. 3) are provided on the outer surface of the circuit board 9 at symmetrical positions. The fire detector 1 is arranged so as to face downward when installed. Note that the number of the light emitting elements 11 is not limited to two, and may be any number as long as the ring-shaped shining portion of the light guide 13 shines sufficiently.
Further, a light guide 13 formed of a bottomed cylindrical body having a recess 13 a for housing the light emitting element 11 is provided so as to cover the entire opening of the housing 5.

As shown in FIG. 3, the ring-shaped portion arranged on the peripheral portion of the bottom portion of the light guide 13, that is, on the peripheral portion of the opening portion of the housing 5, is inside the ring and on the upper side (the upper side in the installed state). It is an inclined surface portion 13b that inclines toward. A cover body 15 made of a light-shielding disc is provided inside the inclined surface portion 13b of the light guide 13.
When the fire detector 1 is viewed from the lower side, a ring-shaped light guide 13 composed of an inclined surface portion 13b is arranged on the peripheral edge of the lower end surface of the main body portion 4, and a cover body 15 is arranged on the concave surface portion. . That is, the main body 4 has a shape in which the lower end surface is recessed upward, and the shining portion (light emitting portion) of the light guide 13 is arranged at the peripheral edge of the recessed portion.

As shown in FIG. 3, since the light emitting element 11 is arranged close to the recess 13a of the light guide 13 and the light of the light emitting element 11 directly enters the light guide 13, the loss of light is small. In addition, the light guide 13 also serves as a substrate holding portion that holds the substrate.
When the light emitting element 11 emits light in a state where the circuit board 9 and the light guide 13 are integrated, the light is guided to the light guide 13 and the ring-shaped inclined surface portion 13b shines. The light emitting element 11 and the ring-shaped portion of the light guide 13 correspond to the light emitting portion of the present invention.

  A thermistor 17 that extends downward and detects the temperature is provided at the center of the recessed portion of the lower end surface of the body portion 4. The thermistor 17 detects heat from a fire, and the detector detects the fire, and when the alarm is issued, the light emitting element 11 is turned on.

<Base>
The base 7 is a member for attaching the housing 5 to the attachment surface 3, is a bottomed cylindrical body having a bottom portion 7a and a tubular portion 7b, and has an outwardly facing flange portion 7c formed therein. There is.
With the housing 5 accommodated in the tubular portion 7b, the base 7 is inserted into the hole provided in the mounting surface 3 and the flange is fixed to the hole edge, so that the housing 5 is embedded in the mounting surface 3. It can be installed at.

When the fire detector 1 of the present embodiment configured as described above is attached to the ceiling surface, it is only the thickness portion of the flange portion 7c and the thermistor 17 that project downward from the ceiling surface. Therefore, it is possible to install the fire detector, which is a functional part that should be originally inconspicuous, inconspicuously.
Further, in the installed state, the inclined surface portion 13b of the light guide 13 forming the light emitting portion is provided in a ring shape on the peripheral edge of the upward concave portion of the main body portion 4, and therefore is hardly noticeable. In particular, the recessed peripheral portion is also a shadowed portion, so that it is even less noticeable. Therefore, the appearance is not spoiled unlike the conventional example in which the confirmation light is exposed to the outside.

On the other hand, when the light emitting element 11 emits light in the warning state, it is guided to the light guide 13 and the ring-shaped inclined surface portion 13b shines. At this time, since the dark part is illuminated in the normal state, it can be seen at a glance that the state is different from the normal state, and it can be easily confirmed that the alarm state is issued. In particular, in this embodiment, since the light guide 13 has a ring shape, the light guide 13 can be visually recognized from any direction of 360 ° and has an inclined surface. The visibility is further improved because the inclined surface on the back side can be seen well.
As described above, the fire detector 1 according to the present embodiment realizes improvement in both the visibility and the design of the alarm state.

[Second Embodiment]
The fire detector 1 according to the first embodiment is provided with the bottomed frame-shaped base 7 having the outward flange on the opening edge, so that the fire detector 1 can be installed on the mounting surface 3 as an embedded type.
On the other hand, as shown in FIGS. 4 to 6, the fire detector 19 of the present embodiment has a cylindrical base 21 on the upper end side of the housing 5, and is exposed to the mounting surface 3 by the base 21. It is installed as a mold.
The components other than the base 21 are the same as those in the first embodiment, and in FIGS. 4 to 6, the reference numerals and names of the respective parts constituting the fire detector 19 are the same as those in the first embodiment except the base 21. There is.

As shown in FIGS. 4 to 6, the fire detector 19 of the present embodiment is mounted so as to project from the mounting surface 3, so that the fire detector 19 itself can be easily seen from the outside as compared with the first embodiment. ing.
However, since the housing 5 has a tubular shape and the lower end is recessed toward the mounting surface 3 side, and the functional portion is provided in the recessed portion of the main body portion 4, as compared with the conventional shape in which the functional portion is largely exposed. Innovative and excellent in design.
Further, the light emitting portion is provided in a portion recessed from the peripheral portion of the housing 5 as in the first embodiment, and is a dark portion in a normal state, so that it is difficult to see and emits light in a normal state as in the first embodiment. It has the effect of being excellent in visibility.

In addition, in the above-mentioned Embodiments 1 and 2, the heat detector provided with the thermistor 17 is illustrated as an example of the fire detector, but the fire detector of the present invention is not limited to this and detects smoke. Smoke detector for detecting fire, fire detector such as flame detector for detecting fire by detecting flame wavelength, and combustion products (CO, CO ₂ etc.) and gas concentration for fire detector It also includes a fire detector for detecting.
Further, although the inclined surface portion 13b of the light guide 13 has a ring shape, this ring may be continuous without interruption in the middle, but in the present invention, the ring is interrupted in the middle and is in a discontinuous state. Including those that have become.
Further, although the housing 5 has a cylindrical shape, it is not limited to a cylindrical shape and may have a rectangular tube shape, for example, a polygonal tube shape such as a square tube. Further, the ring of the light emitting portion is not limited to the circular shape and may be a polygonal ring.

1 Fire detector (Embodiment 1)
3 Mounting Surface 4 Main Body 5 Housing 5a Bottom 5b Cylindrical Part 7 Base (Embodiment 1)
7a Bottom part 7b Cylindrical part 7c Flange part 9 Circuit board 11 Light emitting element 13 Light guide 13a Recessed part 13b Inclined surface part 15 Cover body 17 Thermistor 19 Fire detector (Embodiment 2)
21 Base (Embodiment 2)

Claims (2)

A body portion for accommodating the detecting portion for detecting a fire, a light-emitting unit that emits light when it is provided to the body portion and the outgoing paper state, fire detector mounted to the Mounting surface sensing a fire And
The main body portion has a bottomed cylindrical casing whose lower end opens in the attached state,
A tubular portion for accommodating the casing, and an outward flange portion on a peripheral edge of the tubular portion; and a base for attaching the main body portion to an attachment surface in an embedded manner,
The fire detector, wherein the light emitting portion is provided in a ring shape on a peripheral portion of an opening portion of the housing, and includes an inclined surface portion that is inclined inwardly and obliquely upward of the ring . Fire detector according to claim 1, characterized in that a thermistor for sensing the temperature out the main body portion or we extend are provided.

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