JP2009211327A - Lighting device and smoke sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device allowing for clearly viewing a lighting state even when observing to look up the housing attached, for example, on a ceiling from any position in a lower section; and to provide a lighting device allowing for clearly viewing a lighting state even when observing to look up the housing attached, for example, on a ceiling from any position in a lower section and also even if the smoke or fog, etc., exists near the ceiling. <P>SOLUTION: A lighting device includes: a housing with an attachment face and a plain face formed on the opposite side of the attachment face; a light emission unit installed in the housing; a light collection unit collecting light emitted from the light emission unit; and a light radiation unit being protruded from the plain face and radiating the light collected by the collection unit. A smoke sensor incorporating the device is provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lighting device and a smoke detector, and more specifically, a lighting device that emits light so that it can be clearly seen from all directions even in the presence of soot and smoke, and such a lighting device. Thus, the present invention relates to a smoke detector that can easily recognize an optical signal from all directions.

  Patent Document 1 states that “a labyrinth wall formed with a partition wall that allows intrusion of smoke from outside and prevents the incidence of external light, and a light distribution from the light emitting element to a smoke sensing chamber surrounded by the labyrinth wall. The optical component on the light-emitting side, the optical element chip, the optical member, the detection circuit, and the circuit components of the detection circuit including the optical element chip and the integrated circuit chip for the optical element are mounted and mounted. A fire detector characterized in that it is provided with a circuit board (see claim 12 of Patent Document 1).

This Patent Document 1 has the following description regarding the structure of the fire detector.
"[Paragraph number 0032]
Next, the structure of the fire detector will be described with reference to FIGS. As shown in FIGS. 7 to 9, the fire detector includes a body 1 attached to a construction surface such as a ceiling surface, a light-emitting diode LED made of a printed board, a chip-formed photodiode PD, and a smoke detection circuit described later. The circuit board 2 on which the circuit components are mounted, and a smoke sensing chamber S having a substantially circular horizontal cross section surrounded by a labyrinth wall 9 that allows intrusion of smoke from the outside and prevents the entrance of external light The optical circuit component 2 is mounted on the upper surface with the light-emitting diode LED and the photodiode PD facing the optical component with the optical component mounted in the smoke sensing chamber S. A base 3, an insect repellent cover 4 for preventing insects and the like from entering the inside of the smoke detection chamber S provided on the optical base 3, and a protective cover 5 are configured.
[Paragraph number 0033]
The body 1 is formed by integrally forming a substantially disc-shaped main portion 1a and a side wall 1b protruding upward from the outer peripheral edge of the main portion 1a. A round hole 1c is formed at a substantially center of the lower surface of the main portion 1a. The optical base 3 to which the circuit board 2 is fixed and the protective cover 5 holding the insect-proof cover 4 are inserted and fixed in the round hole 1c. "
In short, the fire detector disclosed in Patent Document 1 has a protective cover protruding downward at the center of a body attached to the ceiling, and an LED is attached to the inside of the protective cover.

  If it does so, there exists a problem that the light emission of LED which becomes a visual alarm at the time of fire detection may be visible or not visible depending on the position of the person in the room.

  Patent Document 2 states that “the light receiving element includes a dark box, a light emitting element, and a light receiving element, and the scattered light when the light emitted from the light emitting element is scattered by the smoke flowing into the dark box. In the fire detector that detects a fire by receiving light, the wall of the dark box is formed in a shape having a basic shape of a circle of a predetermined size and at least a part of which protrudes outside the circumference of the circle. The light emitting element is disposed in the protruding portion of the dark box, and the light receiving element is installed outside the dark box so that its optical axis is substantially perpendicular to a plane including the circle. The fire detector characterized by this is described (see claim 1 of Patent Document 2).

  As shown in FIG. 2B, the fire detector disclosed in Patent Document 2 includes an LED (light emitting diode) 53 and its LED to indicate that the fire detector is in operation. A lens 24 for guiding emitted light is provided (see paragraph numbers 0050 and 0052 of Patent Document 2). 1A and 2B, the lens 24 is mounted so that the lens hole 5 and the tip of the lens 24 are flush with each other.

  Then, when observing from directly under the fire detector installed on the ceiling surface, the light of this lens can be surely seen, but from the person who is observing from a little distance, the light of the lens is well visible. It cannot be said. There's a problem.

JP 2007-13212 A JP 2006-244515 A

  The present invention provides, for example, a lighting device that allows a lighting state to be clearly seen even when a case attached to a ceiling is viewed from any position below, for example, a case attached to a ceiling. It is an object of the present invention to provide a lighting device that can clearly observe the lighting state even when the body is observed from any position below and when haze or the like is present near the ceiling.

  By incorporating such a lighting device, the present invention provides smoke detection that can clearly observe and visually recognize the operating state or fire occurrence information by looking up from any position below. Provide smoke detectors, for example, smoke detectors that can clearly recognize the occurrence of a fire from the lighting state even if there is smoke near the ceiling or looking up from any position in the family direction This is the issue.

As means for solving the problems,
Claim 1
A housing having a mounting surface and a flat portion formed on the opposite side of the mounting surface;
A light emitting unit provided in the housing;
A light collecting unit for collecting light emitted from the light emitting unit;
A lighting device characterized by comprising a light emitting part that projects from the flat part and emits light collected by the light collecting part;
Claim 2
The lighting device according to claim 1, wherein the light emitting unit is a high-intensity LED.
Claim 3
3. The lighting device according to claim 1, wherein the light-emitting portion is formed of a transparent solid body, and a portion of the light-emitting portion that protrudes from the planar portion of the housing forms a polygonal trapezoid. And
Claim 4
The said condensing part is a cylinder which can incorporate the said light emission part, The inner surface of the cylinder forms the light reflection surface, The said any one of Claims 1-3 formed. A lighting device,
Claim 5
A smoke detector comprising the lighting device according to any one of claims 1 to 4.
Claim 6
The detection means which detects the smoke which flowed in into the inside from the inflow port established in the said mounting surface vicinity in the surrounding side surface of the said housing | casing in the lighting device of any one of the said Claims 1-4, and the said detection means The smoke detector according to claim 5, further comprising a control unit that controls the light emitting unit based on a detection signal output from
Claim 7
The casing has a peripheral side surface by having an interval between a mounting substrate, a bottomed cylindrical body having a flat surface which is an outer surface of the bottom, and a lower end edge of the mounting substrate and an upper end edge of the bottomed cylindrical body. An inlet formed so as to make a circuit, and a smoke introduction substrate for guiding smoke flowing into the interior from the inlet,
The detection means is a light emitting element and a light receiving element,
The light receiving element can receive light emitted from the light emitting element, and includes a cylindrical body portion that opens to a surface of the smoke introduction substrate facing the attachment substrate and extends to the opposite side of the attachment substrate. The smoke detector according to claim 5 or 6,
Claim 8
The smoke detector according to claim 7, wherein the smoke introduction substrate includes a dam portion positioned inside the housing so as to face the inflow port.

  The lighting device according to the present invention has a housing. This housing has an attachment surface for installing the lighting device on an appropriate part such as a ceiling surface, and a flat portion formed on the opposite side of the attachment surface. According to this invention, since the light condensed by the condensing part is radiated from the light emitting part protruding from the flat part of the housing, the light emitted from any direction on the flat part side is radiated. Provided is a lighting device that can be confirmed by an observer and that can emit light with a large amount of light because light emitted from a light emitting unit is collected by a light collecting unit and emitted from a light emitting unit. .

  According to the present invention, if the light-emitting part is a high-intensity LED, even if smoke is present around the lighting device, light emission from the light-emitting part is not blocked or difficult to see by the smoke. A lighting device that can confirm the lighting state is provided.

  According to the present invention, since the entire light emitting part is formed of a transparent solid body (hereinafter sometimes referred to as a transparent solid substance), light emitted from the light emitting part, particularly from the high-intensity LED, is emitted. Since the portion of the light emitting part that protrudes from the flat part of the casing has a polygonal trapezoidal shape, the light emitting part is powerful in all directions from the light emitting part to the flat part of the flat part of the casing. A lighting device capable of emitting light is provided.

  According to this invention, since the condensing part is a cylindrical body that houses the light emitting part, the light emitting part is stably fixed, and the light that is about to be emitted from the side surface of the light emitting part is emitted by the light collecting part. The total light is reflected at the interface of the light and the light travels in the light emitting part by repeating such total reflection, so that the light emitted from the light emitting part is all emitted without significant attenuation of the light amount. It is discharged from the tip portion protruding from the flat surface portion. Therefore, according to this invention, the lighting device which can radiate | emit powerful light toward all the directions which a plane part faces is provided.

  The present invention can provide a smoke detector including the lighting device. Since this smoke detector is equipped with the lighting device according to the present invention, the emission of light emitted from the light emitting portion protruding from the flat portion of the housing is visually recognized from all directions toward the flat portion of the housing. be able to. Therefore, for example, when this smoke detector is installed on the ceiling, the lighting of the light emitting part in the smoke detector can be visually recognized from anywhere in the room. Therefore, if the lighting of the light emitting unit in this lighting device is light indicating the operating state of the smoke detector, for example, the operating state of the smoke detector can be confirmed from any direction, and If the blinking of the light is, for example, light indicating that smoke has been generated by the smoke detector, it is possible to confirm the occurrence of fire from any direction using this smoke detector.

  A smoke detector according to the present invention includes the lighting device according to the present invention, a detection unit, and a control unit, and the detection unit is a flow established near a mounting surface on a peripheral side surface of the casing of the lighting device. Smoke entering the inside of the housing from the entrance is detected, and the control unit controls the light emitting unit in the lighting device based on the detection signal output from the detection signal. Therefore, according to the present invention, it is possible to provide a small smoke detector that can accurately detect the occurrence of a fire by the lighting device.

  Further, according to the present invention, since the smoke introduction substrate for guiding the smoke flowing into the interior from the inlet is provided inside the casing, the smoke flowing into the interior from the inlet is retained in the casing, or Without being distributed in an unexpected direction, it can be accurately guided to the detection means. Therefore, according to this invention, the smoke detector which can perform smoke detection correctly can be provided.

  In particular, if the smoke introduction board is provided with a dam part, the smoke flow over the dam part is uniformly distributed inside the housing, so that smoke is not unevenly distributed or stays inside the housing. Smoke can be introduced into the detection means, and a smoke detector capable of accurately detecting smoke can be provided.

  The smoke detector according to the present invention includes the lighting device according to the present invention, detection means, and a control unit.

  The lighting device includes a housing, a light emitting unit, a light collecting unit, and a light emitting unit.

  The housing has a form and a shape capable of incorporating the light emitting unit, the light collecting unit, and the light emitting unit. The form and shape are appropriately determined according to the use of the lighting device or the use of the device in which the lighting device is incorporated. For example, the lighting device can be incorporated into a smoke detector.

  A preferred smoke detector according to the present invention comprises a housing. This case may be common to the case in the lighting device.

  The casing in the smoke detector of the present invention has an inlet for smoke into the peripheral side surface portion. The housing determines the overall shape of the smoke detector of the present invention and exhibits the appearance of the smoke detector. The casing includes a detection unit and a control unit, which will be described later, and may further include a smoke introduction board.

  An appropriate member can be adopted as the casing of the smoke detector as long as the member has an inflow port through which smoke flows. Examples of the shape of the housing include a cylindrical shape in which both ends are closed, an elliptic cylinder shape in which both ends are closed, a truncated cone shape in which both ends are closed, and a polygonal cylinder shape in which both ends are closed. A cylindrical shape is preferable as the shape in which smoke easily flows from the entire circumference of the peripheral side surface of the housing. The size of the housing may be any size as long as the smoke detector according to the present invention can maintain the function of detecting smoke. For a person in a space where the smoke detector is installed, for example, in a room, if the smoke detector is large, the interior of the place where the smoke detector is installed may be damaged. Therefore, it is preferable that the smoke detector of the present invention is small enough to detect smoke and maintain the function of the lighting device, while not impairing the installation location, for example, the interior of the bedroom, hallway, and the like.

  The casing can be formed into the predetermined shape and size with a single member, or can be formed into a predetermined shape and size as an assembly of a plurality of members.

  Furthermore, the material forming the casing is not particularly limited as long as it can operate normally in the environment where the smoke detector of the present invention is installed, and examples thereof include plastic, wood, ceramics, and metal.

  The inlet provided in the housing is provided on the peripheral side surface of the housing. A preferable inflow port is provided in the surrounding side surface of a housing | casing over the perimeter. However, it is also possible to provide a plurality of inflow ports in a part of the peripheral side surface of the housing. Note that when the smoke that has flowed into the housing does not flow out or is difficult to flow out, the smoke that has once flowed into the housing may continue to be detected by a detection means such as a sensor described later. It may not be possible to accurately detect the situation of the environment where the smoke detector is installed. Therefore, it is preferable to provide a plurality of inlets at least on the peripheral side surface of the casing so that the smoke that has flowed into the casing easily flows out, and it is more preferable to provide the entire periphery of the peripheral side surface of the casing. At this time, the inflow port also functions as an outflow port from which smoke flows out.

  By providing the inlet on the peripheral side surface of the casing, the scale of the entire smoke detector can be reduced, and the shape of the entire smoke detector can be simplified. For example, comparing the external shape of the fire detector described in Patent Document 1 with the external shape of the smoke detector according to the present invention, the fire detector described in Patent Document 1 is shown in FIG. A body formed by continuously and integrally forming a substantially disc-shaped main portion and a side wall protruding upward from the outer peripheral edge of the main portion, and a protective cover protruding downward substantially at the center of the bottom surface of the main portion, Thus, when the fire detector is attached to the ceiling, it has a convex overall shape in which a large circular cylinder and a small circular cylinder are overlapped downward. The reason why the fire detector described in Patent Document 1 has the overall shape of such a two-stage cylindrical body is that the sensor is provided inside the protective cover, not inside the body.

  Since the smoke detector according to the present invention is provided with an inlet on the peripheral side surface of the housing as compared with the fire detector described in Patent Document 1, the cylinder 2 as in the fire detector described in Patent Document 1 is provided. It is not necessary to form the entire shape of the stacked layers, for example, it can be a simple three-dimensional shape such as a cylindrical body, an elliptical cylindrical body, a rectangular cylindrical body, and the height from the mounting surface of the housing is reduced. Can do. That is, the smoke detector according to the present invention can have a small overall shape.

  Moreover, in the fire detector described in Patent Document 1, it is difficult to detect smoke moving at low speed on the ceiling. However, when the inlet is provided on the peripheral side surface of the housing as in the smoke detector of the present invention, the inlet is close to the ceiling, so that smoke moving at low speed on the ceiling can be easily flown. It can be introduced into the housing from the entrance.

  In the early days of fire, smoke moves slowly along the ceiling. Therefore, being able to detect smoke that moves slowly along the ceiling close to the ceiling quickly detects the occurrence of a fire and quickly informs people of the occurrence of the fire, The smoke detector according to the present invention can contribute to early detection of a fire.

  In order to provide an inflow port over the entire circumference of the peripheral side surface of the housing, for example, two bottomed cylindrical bodies that open at one end are provided, and the distance between the openings is held to be the size of the inflow port. By connecting and integrating the bottomed cylinders to each other, the end edge of the bottomed cylinder becomes an inflow port, so that the housing in the smoke detector of the present invention can be obtained. However, for example, in the case where the inlet is provided on a part of the peripheral side surface of the housing, the inlet is provided on the peripheral side surface of the cylindrical body that closes both ends without using a separate member as described above. Also good.

  Further, as another method of providing an inflow port over the entire circumference of the peripheral side surface of the housing, the mounting substrate includes a mounting substrate attached to an installation surface, for example, a ceiling surface, and a bottomed cylindrical body that is a smoke detector body. Are formed so that a slight gap is formed between the lower part of the bottomed cylindrical body and the peripheral upper end part of the bottomed cylindrical body, and an inflow port is formed, and the smoke detector body and the mounting substrate are detachably integrated. It is good also as the housing | casing comprised by assembly. In this case, the gap between the mounting substrate and the upper end of the peripheral side surface of the smoke detector body serves as an inflow opening that opens around the peripheral side surface.

  Normally, when a fire occurs indoors, in the early stage of the fire, smoke generated from the fire source rises toward the ceiling, and the smoke that reaches the ceiling moves slowly and slowly along the ceiling surface. Also, when smoke is circulating, smoke may slowly and slowly circulate at a position close to the ceiling surface. If light smoke that moves slowly under the ceiling surface can be detected at the initial stage of the occurrence of a fire, it is possible to take quick measures against the fire, such as evacuation behavior, fire fighting behavior, reporting behavior, and the like. The position of the inlet in the casing of the smoke detector of the present invention is not particularly limited as long as smoke can flow into the casing, but the installation surface on which the smoke detector of the present invention is installed on the peripheral side surface of the casing It is preferable to provide an inflow port at a site close to the surface because smoke flowing along the installation surface easily flows from the inflow port.

  The smoke detector of the present invention emits light from the light emitting part in the lighting device according to the present invention or blinks based on a signal output from detection means such as a sensor that detects smoke. An alarm can be issued. When the detection means detects smoke, it can be detected that smoke is generated at the place where the smoke detector of the present invention is installed. In addition, when the smoke detector of the present invention detects the presence of smoke, it detects the presence of smoke or fire in people in the space where the smoke detector is installed or in other places. Can be alarmed.

  The smoke detector can include not only the lighting device according to the present invention but also an audible alarm means for alarming by voice or sound. When the smoke detector according to the present invention includes an audible alarm means and the lighting device according to the present invention, an abnormality such as a fire is present in a space where the smoke detector is installed, for example, a room. You can warn people more reliably.

  As described above, the smoke detector according to the present invention includes the lighting device according to the present invention in the casing.

  It is preferable that the housing in the smoke detector incorporating the lighting device according to the present invention is the same as the housing in the lighting device.

  The casing which is the casing of the lighting device and the casing of the smoke detector has an attachment surface for attachment to a ceiling or the like, and a flat portion formed on the opposite side of the attachment surface.

  The light emission part in a lighting device should just be a light source which light-emits with big brightness, for example, can mention LED and high-intensity LED, and high-intensity LED is suitable.

  The light emission part in a lighting device light-guides the light emitted from the said light emission part, and has the protrusion part which protruded from the plane part in a housing | casing. In other words, this light emission part is formed by the light emission part main body which exists in a housing | casing, and the protrusion part which protrudes from the plane part in a housing | casing. Since the light emitting part has the protruding part as a part protruding from the flat part in the casing, the light emitted from the light emitting part is guided into the light emitting part main body existing in the casing, and from the flat part of the casing Light is emitted to the outside from the protruding protrusion. Therefore, since the emitted light is radiated in all directions toward the flat portion of the housing, the smoke detector having this lighting device can be used in a space where the smoke detector is installed, for example, people in a room. Can appeal to the visual sense of.

  It is preferable that the protruding portion protruding from the flat portion of the housing is formed into a polygonal trapezoid. This is because the light emitted from the projecting portion formed in the polygonal trapezoid can be surely seen by people moving in the space where the smoke detector is installed.

  This light emitting part can be usually formed of a transparent material, for example, a transparent resin such as an acrylic resin, glass or the like. In consideration of ease of molding, cost, and the like, it is preferable that the light-emitting portion is formed of a transparent resin.

  A portion of the light emitting portion existing in the housing, that is, the light emitting portion main body is attached to the light collecting portion. A condensing part condenses the light radiated | emitted from the said light emission part, and guides light in the said light emission part. Therefore, the presence of the condensing part is efficient because it does not cause the light emitted from the light emitting part to be emitted outside the light emitting part, so that the light emitted from the light emitting part is not wasted. All the light emitted from the light emitting part is guided in the light emitting part and emitted from the protruding part in all directions toward the flat part of the housing, so that the light from the protruding part in the light emitting part has high brightness. It becomes.

  The smoke detector according to the present invention has detection means and a control unit.

  The detection means may be any means that can detect the presence of smoke, and examples thereof include an optical sensor, for example, a sensor having a light emitting element and a light receiving element. As an example of an optical sensor, light emitted from the light emitting element does not reach the light receiving element when smoke does not flow into the sensor, and is emitted from the light emitting element when smoke flows into the sensor. A sensor that outputs a detection signal indicating that smoke is flowing in when light is reflected by particles that form smoke and reaches the light receiving element and the light receiving element receives light can be given. In addition, a direct current or alternating current power supply can be used for the power supply of a sensor, for example, a battery or a household power supply can be mentioned.

  The control unit controls the light emitting unit based on a detection signal output from the detection unit. For example, when the detection unit is formed of a light emitting element and a light receiving element, the control unit always turns on the light emitting unit when a detection signal for detecting the presence of smoke is not output from the light receiving element. When the detection signal for detecting the presence of smoke is output from the light receiving element, the control signal for blinking the light emitting unit may be output.

  In the smoke detector according to the present invention, the housing includes a mounting substrate, a bottomed cylindrical body, and a smoke introduction substrate.

  When this smoke detector is attached to the installation surface, for example, the ceiling surface, the attachment substrate contacts the installation surface. Therefore, the mounting substrate has a mounting surface.

  The bottomed cylindrical body has a flat outer surface at the bottom. That is, in a state where the bottomed cylindrical body is mounted on the mounting substrate, the bottom portion of the bottomed cylindrical body located on the side opposite to the mounting substrate is formed on a flat surface, that is, a flat portion. In addition, the meaning of a plane means that arbitrary virtual straight lines formed from the projecting portion of the light emitting portion projecting from the planar portion to the edge of the bottom portion exist in the same plane.

  When the mounting substrate and the bottomed cylindrical body are integrated so that the lower end portion of the mounting substrate and the upper end portion of the bottomed cylindrical body have a gap, the opening makes a round around the peripheral side surface of the housing. It becomes. This opening in the smoke detector according to the invention forms the inlet. The smoke detector includes a smoke introduction substrate that guides smoke flowing into the housing from the inlet.

  The smoke introduction board has a dam part facing the inflow port, a flow surface through which smoke circulates, and a cylindrical part on a surface facing the mounting board.

  The dam portion is a dam-like member that is provided inside the housing and is formed facing the inflow port. Due to the presence of the dam portion, the smoke that has flowed into the casing from the inflow port passes through the dam portion and further circulates inside the casing, and then moves to the next distribution surface.

  The dam part is thought to disturb the flow of smoke that has passed through the dam part while maintaining the circulation of the smoke flowing in from the inlet. As a preferred embodiment of the dam part, the size of the smoke flow path at the top of the dam part, that is, the dimension from the top part to the mounting board is the size of the inlet of the housing, that is, the bottom edge from the lower edge of the mounting board. The aspect designed smaller than the dimension to the upper end edge of a cylindrical body can be mentioned. If the size of the smoke flow path at the top of the dam is small, the smoke flowing in from the inflow port will be compressed as it flows through the top of the dam, and the smoke flow rate at the top of the dam will increase. Then, when the smoke passes over the dam part, the compressed state and the high speed state are released, so that the smoke becomes a jet and advances on the flow surface toward the inside of the housing while disturbing the flow state of the smoke. That is, when the size or gap of the smoke flow path at the top of the dam is small, it is estimated that the dam has an orifice-like action.

  When the smoke detector of the present invention is installed horizontally, the dam portion is preferably composed of an outer slope facing the inflow port, a horizontal surface as the top, and an inner slope for releasing the compressed state of smoke. When the dam part is composed of an outer slope, a top that is a horizontal plane, and an inner slope, smoke can easily flow into the housing, and an orifice-like action can be suitably exhibited. There is no particular limitation on the size of the flow path through which smoke flows at the top of the dam, that is, the dimension from the dam to the mounting substrate.

  The shape of the dam portion may be a dam shape and may be a shape that disturbs the flow of smoke. For example, the casing is a cylindrical body, and an inflow port is provided over the entire circumference of the peripheral side surface. In some cases, an annular dam can be provided inside the housing along the inflow port.

  The size of the dam portion is not limited as long as smoke can circulate at the top of the dam portion. In addition, if disturbance light entering from the inflow port is projected onto an optical member that detects smoke in the smoke detector of the present invention, for example, a sensor described later, malfunction may occur. The sensor blocks most of the light incident from the inlet by providing the dam portion.

  The material of the dam portion is preferably a material that is hardly changed by smoke, and examples thereof include plastic, wood, ceramics, and metal. The housing and the dam portion may be integrated, and can be formed by integral molding, for example. In addition, a plurality of dam portions can be provided within a range that does not block the flow of smoke. For example, an annular second dam portion that is concentric with the annular dam portion is provided inside the annular dam portion described above. May be. If this form is further generalized, the smoke introduction board in the smoke detector according to the present invention can include a plurality of dam portions formed in a plurality of rings with the central axis of the smoke introduction board as a concentric axis. Providing a plurality of dam portions improves the light blocking efficiency of ambient light that attempts to enter the housing.

  The flow surface is a surface through which the smoke that has flowed into the housing over the dam portion flows.

  The shape of the distribution surface is not limited as long as the smoke that has flowed into the housing can flow without stagnation after passing over the dam part. The distribution surface may be, for example, a simple flat surface, or an uneven surface having unevenness to such an extent that the flow of smoke is not hindered. In addition, as a preferable aspect of a distribution surface, the aspect which provides the groove | channel extended from a dam part to the below-mentioned cylinder part in a part of plane part can be mentioned, smoke can be distribute | circulated along a groove | channel. By forming the flow path, smoke can be sensed efficiently. The material for the distribution surface is preferably a material that is hardly changed by smoke, and examples thereof include plastic, wood, ceramics, and metal. The dam portion and the distribution surface may be integrated, and can be formed by integral molding, for example.

  The cylindrical body part is a part that is provided in a part of the flow surface, allows smoke that flows through the flow surface to flow in, and allows the light receiving element to receive light emitted from the light emitting element. When the casing of the smoke detector according to the present invention is formed of the mounting substrate, the bottomed cylindrical body, and the smoke introduction substrate and has a substantially cylindrical shape as a whole, the cylinder portion of the smoke introduction substrate is It is a cylindrical body that is provided at the center of the introduction board and protrudes in the direction opposite to the mounting surface, and has a depth that prevents incident light even if there is ambient light that enters the housing. As long as the light emitting element and the light receiving element can operate normally. The smoke that has flowed into the smoke detector of the present invention has a flow velocity that drops after it has passed over the dam portion, and further decreases as the flow rate of the smoke flows through the flow surface. It is estimated that when it reaches, it sinks due to its own weight and falls into the cylindrical part.

  Here, the detection means for detecting smoke is as described above.

  The shape of the cylindrical portion is a cylindrical body that is recessed in a part of the distribution surface, that is, a cylindrical body that protrudes downward when the distribution surface faces upward, and smoke easily flows in, And as long as disturbance light does not enter into a light emitting element and a light receiving element, it does not restrict | limit, For example, the cross-sectional shape of radial direction is circular, an ellipse, a polygon etc. is employable. The shape of the cylindrical portion is not particularly limited as long as it is recessed from the distribution surface, and examples thereof include an embodiment in which the cross-sectional shape is a circle, an ellipse, a polygon, or the like. The size of the cylinder part is preferably such that smoke can easily flow into the cylinder part, and if possible, the size can be reduced to contribute to the size reduction of the smoke detector of the present invention. As the material of the cylindrical portion, a material that is difficult to be changed by smoke is preferable, and examples thereof include plastic, wood, ceramics, and metal. The flow surface and the cylindrical portion may be integrated, for example, formed by integral molding or the like.

  The operation of the smoke detector and lighting device of the present invention will be described below.

  First, the smoke detector of the present invention is installed. At this time, it is assumed that no smoke is generated in the environment where the smoke detector of the present invention is installed. Further, the above-described optical sensor is employed as a detecting means for detecting smoke by the smoke detector of the present invention. Examples of the place where the smoke detector of the present invention is installed include places where smoke easily circulates, such as ceiling surfaces and wall surfaces. The installation location is preferably a flat surface that can be installed without rattling in consideration of the stability of the smoke detector of the present invention.

  When smoke flows through the place where the smoke detector of the present invention is installed, the smoke flows into the housing through the inlet.

  The smoke that has flowed into the housing further flows into the housing so as to get over the dam portion. It is presumed that the smoke distribution direction is disturbed when the smoke passes over the dam. In addition, the dam part is a disturbance that tries to enter the casing so that the sensor for detecting smoke arranged in the cylindrical part, for example, the light emitting element and the light receiving element do not malfunction due to external disturbance light. Most of the light is blocked.

  Subsequently, the smoke that circulates further over the dam part and further toward the inside of the housing circulates on the distribution surface. It is considered that the smoke flow rate after the dam section has gradually decreased as it circulates on the distribution surface.

  Next, the smoke that has circulated through the flow surface flows into the cylindrical portion. When the smoke detector according to the present invention is installed on the ceiling surface, the cylinder portion is projected downward, so that smoke easily flows down from the flow surface into the cylinder portion. In addition, the smoke which distribute | circulated the distribution surface and the flow velocity fell tends to flow down in a cylinder part. Therefore, smoke flows into the cylindrical body, and the detection means, for example, a sensor can detect the smoke.

  When smoke is detected by the detection means, a detection signal is output to the control unit from the detection means, for example, a light receiving sensor. The control unit determines that smoke is detected by inputting the detection signal, and outputs the control signal to the light emitting unit to cause the light emitting unit to emit light.

  The light emitted from the light emitting unit is guided into the light emitting unit main body. Further, the light emitted from the light emitting unit that does not immediately reach the light emitting unit main body is collected by the light collecting unit into the light emitting unit main body. Eventually, all the light emitted from the light emitting part is guided into the light emitting part main body, reaches the protruding part in the light emitting part protruding from the flat part of the casing, and the flat part of the casing is from the protruding part. Light is radiated to the facing space.

  Here, embodiments of the smoke detector of the present invention will be described with reference to the drawings.

  FIG. 1 shows a smoke detector 1A which is an embodiment of the present invention.

  1 A of smoke detectors are provided with the housing | casing 2, the dam part 3, the distribution surface 4, and the cylinder part 5A.

  The housing | casing 2 comprises the substantially cylindrical shape which obstruct | occludes both ends as a whole shape. The housing 2 has a mounting portion 6 and a housing portion 7. The attachment portion 6 has a cylindrical shape or a disk shape that closes both ends, and one of the flat surface portions of the attachment portion 6 is attached to an installation surface 8, for example, a ceiling. The mounting portion is also called a mounting substrate because it has a disk shape. The attachment portion 6 is preferably fixed to an installation surface 8 which is an attachment surface to which the smoke detector 1A is attached, and can be fixed by various fixing means. The accommodating part 7 is a bottomed cylindrical body which closes one end, and accommodates an operating part 9 which will be described later. The attachment portion 6 and the accommodation portion 7 are coupled by a coupling means (not shown) so that the opening side of the accommodation portion 7 faces the attachment portion 6. A gap between the attachment portion 6 and the accommodating portion 7 is an inlet 10 through which smoke can flow into the housing 2. Therefore, in the smoke detector 1 </ b> A, the inflow port 10 is formed over the entire circumference of the peripheral side surface portion of the housing 2. In addition, a surface that does not face the installation surface 8 in the mounting portion 6, that is, a surface that forms an internal region of the housing 2 is referred to as an internal ceiling surface 11 for convenience.

  The dam portion 3 includes an outer slope 12 that is inclined from the inflow port 10 to the inside of the housing 2 and toward the inner ceiling surface 11, a ridge top portion 13 that is the top of the dam portion 3, and a ridge top portion 13 to the housing. 2 and an inner slope 14 inclined toward the bottom surface of the accommodating portion 7. The reason that the outer slope 12 does not rise vertically from the inlet 10 to the bank top 13 is that the smoke flowing from the inlet 10 toward the inside of the housing 2 is efficiently guided to the inside of the housing 2 without resistance. Because it can be done. The bank top portion 13 is a portion where the dam portion 3 is closest to the internal ceiling surface 11. The inner slope 14 is inclined so that the smoke that has passed over the bank top portion 13 can smoothly flow toward the inside of the housing 2. However, as long as the object of the present invention can be achieved, the outer slope 12 and the inner slope 14 may be provided in the vertical direction in FIG. 1 without being inclined.

  The flow surface 4 is formed integrally with the lower portion of the inner slope 14 and is a smooth horizontal surface. The smoke detector 1A shown in FIG. 1 is designed such that the height of the flow surface 4 is lower than the lower end of the inlet 10, that is, a position away from the installation surface. This is an inner region of the housing 2 formed by the inlet 10, the inner ceiling surface 11, the dam portion 3, the flow surface 4, and the cylindrical body portion 5A, particularly the inner side of the inner slope 14. In addition, it is possible to make it difficult for ambient light entering from the inlet 10 to enter. However, the height of the flow surface 4 is not limited as long as the disturbance light can be shielded to such an extent that the sensor 15 that is the detection means arranged in the cylindrical portion 5A does not malfunction.

  The cylindrical body portion 5 </ b> A is a cylindrical body projecting downward at a substantially central portion of the housing portion 7. A sensor 15 is mounted on the cylindrical portion 5A so as to close the lower end opening. The sensor 15 is an optical sensor and includes a light emitting element 15A, a light receiving element 15B, and a bottom plate 15C on which the light emitting element 15A and the light receiving element 15B are arranged. In addition, the light emitted from the light emitting element 15A can pass through the cylindrical part 5A through which smoke will flow and reach the light receiving element 15B at the lower end opening of the cylindrical part 5A. A notch 5B is provided. In the sensor 15, the light emitted from the light emitting element 15 </ b> A does not reach the light receiving element 15 </ b> B when smoke is not present, and the light emitted from the light emitting element 15 </ b> A is reflected by smoke particles when reaching smoke and reaches the light receiving element 15 </ b> B. In addition, it is set so that smoke is sensed when the light receiving element 15B receives light. Since the cylindrical portion 5A protrudes downward, disturbing light does not easily enter the inside thereof. Note that the bottom plate 15C is a member provided so that disturbance light does not enter the cylindrical portion 5A. However, if the disturbance light does not enter even if the bottom plate 15C is not provided, it is not necessary to provide the bottom plate 15C.

  As shown in FIG. 1, the dam part 3, the flow surface 4, and the cylindrical part 5A are integrally formed on one substrate. This substrate is an example of a smoke introduction substrate. Moreover, in FIG. 1, although the action | operation part 9 is a site | part which has the dam part 3, the distribution surface 4, the cylinder part 5A, and the sensor 15, it forms with various components which implement | achieve the function which operates this smoke detector 1A. Is done. For example, although not shown, the operation unit 9 includes a battery for driving the sensor 15, a lighting device and an audible alarm means for notifying the user of the presence of smoke when the sensor 15 senses smoke, a control unit 36, and the like. Have. The outer edge portion of the outer slope 12 in the dam portion 3 can be engaged, fitted, screwed, or fixed to the inner peripheral surface of the accommodating portion 7.

  The smoke detector 1A further includes a lighting device 40. As shown in FIG. 2, the lighting device 40 includes a light emitting unit 41, a light collecting unit 42, and a light emitting unit that are attached to appropriate portions in the housing 2 that forms the appearance of the smoke detector 1 </ b> A. 43.

  The position or member in the housing to which the light emitting unit 41 is attached is determined as appropriate. In FIG. 2, it is attached to the board | substrate which has the dam part 3, the distribution surface 4, and the cylinder part 5A, ie, the smoke introduction board | substrate 44. In FIG. But in this invention, the position or member to which the light emission part 41 is attached is not limited to the said smoke introduction board | substrate 44. FIG.

  The light emitting unit 41 is preferably formed using, for example, a high-intensity LED. This is because light emission with high luminance can be realized. As shown in FIG. 1, lighting and blinking of the light emitting unit 41 are controlled by the control unit 36.

  As long as the condensing part 42 holds the light emitting part 43 and efficiently guides the light emitted by the light emitting part 41 into the light emitting part 43, the shape, structure, etc. are not limited. However, the condensing part 42 shown in FIG. 2 is formed as a cylindrical body having an inner surface in contact with the outer peripheral surface of the light emitting part 43 so that the light emitting part 43 can be mounted without backlash. . The condensing unit 42 covers the entire light emission region of the light emitting unit 41 so that the light emitted from the light emitting unit 41 does not leak, and from the peripheral side surface of the light emitting unit 43 inside the housing 2. The shape is suitably designed so as to cover all the light emitting part 43 existing in the housing 2, that is, the light emitting part main body, so that light does not leak out. The condensing part 42 shown by FIG. 2 is designed by the cylindrical body which covers all the surrounding side surfaces of the light emission part 41 and the light emission part 43. As shown in FIG.

  The material forming the light collecting portion 42 is not particularly limited as long as the technical matters required for the light collecting portion 42 are satisfied, and examples thereof include synthetic resins, metals, ceramics, and the like. When the condensing part 42 formed in this cylindrical body is formed of synthetic resin, ceramic or the like, it tries to emit light from the peripheral side surface of the light emitting part 43 or returns the emitted light into the light emitting part 43. Since it is necessary, it is desirable that the inner side surface of the condensing part 42 which is a cylindrical body is finished to be a mirror surface, and the inner surface is preferably painted white. Such a mirror surface and a white painted surface are reflective surfaces.

  The light emitting part 43 guides the light emitted from the light emitting part 41 and emits the light from the protruding part 43A at the tip thereof to the outside. The light emitting portion 43 can be formed of a transparent solid body, and examples of the material of the light solid body include a transparent resin and glass. Since the light emitting portion 43 is housed in the light collecting portion 42 and preferably mounted without rattling, the light emitting portion 43 is designed to have a shape having an outer peripheral surface that contacts the inner peripheral surface of the light collecting portion 42. In many cases, the shape of the light emitting portion 43 excluding the projecting portion 43A, that is, the shape of the light emitting portion main body may include a cylindrical body and a prismatic body. The rear end surface of the light emitting portion 43 located on the side opposite to the protruding portion 43A is usually formed into a flat end surface orthogonal to the central axis of the light emitting portion 43. The rear end surface of the light emitting portion 43 may be disposed so as to contact the light emitting portion 41 as shown in FIG. 1, or slightly from the light emitting portion 41 as shown in FIG. It may be arranged so as to be separated from each other. In order to efficiently emit the light emitted from the light emitting part 41 from the protruding part 43, the rear end surface of the light emitting part 43 is preferably brought into contact with the light emitting part 41.

  When there is a surface that is not occupied by the light emitting unit 41 in the surface of an appropriate member on which the light emitting unit 41 is installed and is partitioned as an internal region by the light collecting unit 42, the light reflection efficiency is on that surface. For example, it is preferable to form the reflecting surface 45 by coating the surface with a white paint. If such a reflection surface 45 is formed, light that is emitted from the light emitting portion 41 and is not directed to the light emission portion 43 is reflected by the reflection surface 45 and guided to the light emission portion 43. Since the intensity of the light emitted from the portion 43A increases and all the light emitted from the light emitting portion 43 can be emitted from the protruding portion 43A, it is efficient.

  The protruding portion 43A is a portion protruding from a flat portion formed on the opposite side of the mounting surface of the housing 2. The protruding portion 43A is formed so as to be able to radiate light emitted from the light emitting portion 41 by protruding from the flat portion of the housing 2 in all directions toward the flat portion from the flat portion. Therefore, the shape of the protrusion 43A may be a hemispherical dome shape or a polygonal trapezoidal shape. The protrusion 43A shown in FIG. 2 is formed in an octagonal trapezoid shape. If the protrusion 43A is formed in a polygonal trapezoidal shape, particularly an octagonal trapezoidal shape, when the smoke detector 2 is installed on the ceiling, for example, from the eyes of the people in the room, Thus, the projection 43A is observed, and the light emitted from the projection 43A varies depending on the viewing angle, so that the effect can be greatly exerted as a visual warning means.

  As shown in FIG. 1, the lighting state of the lighting device 40 is controlled by the control unit 36.

  As a program for controlling the light emitting unit 41, for example, when the smoke detector 1A is operating normally, a program for outputting a control signal so that the light emitting unit 41 is always lit, and detection means such as a sensor For example, when 15 detects smoke, a program for outputting a control signal to cause the light emitting unit 41 to blink can be cited.

  Below, the usage method and its effect | action of 1 A of smoke detectors are demonstrated.

  First, the smoke detector 1A is installed so that the attachment portion 6 of the smoke detector 1A is fixed to the installation surface 8. As a method of fixing the attachment portion 6 to the installation surface 8, a method of fixing with a wood screw or the like can be used. In addition, when using the smoke detector 1A in a house or the like, it is preferable that the installation surface 8 does not cause as much mounting marks as possible when the smoke detector 1A is removed from the viewpoint of protecting the interior of the installation location.

  When smoke is generated in a space where the smoke detector 1A is installed, such as a room, the smoke often circulates along the installation surface 8. When the smoke flows along the installation surface 8, the smoke flows into the housing 2 through the inflow port 10.

  The smoke that has flowed into the housing 2 is guided along the outer slope 12 toward the inside of the housing 2. Furthermore, after passing over the bank top portion 13, the smoke flows toward the inner region of the housing 2 formed by the inner slope 14, the inner ceiling surface 11, and the flow surface 4. It is considered that the smoke distribution direction is disturbed when the smoke passes over the dam portion 3. In addition, the dam portion 3 has a large amount of disturbance light that attempts to enter the internal region so that the sensor 15 attached to the lower end opening of the cylindrical body portion 5A does not malfunction due to external disturbance light. The part is shaded.

  Subsequently, the smoke that circulates over the dam portion 3 circulates on the distribution surface 4. It should be noted that the smoke that has passed over the dam portion 3 has its flow velocity gradually lowered while it is circulating on the flow surface 4.

  Next, the smoke that has circulated through the flow surface 4 flows into the cylindrical portion 5A. Since the cylindrical portion 5A is opened downward, the smoke that has circulated along the flow surface 4 tends to flow into the cylindrical portion 5A. In addition, it is thought that the smoke which distribute | circulated the distribution surface 4 and the flow velocity fell easily flows down in the cylinder part 5A. When smoke flows into the cylindrical portion 5A, the sensor 15 can sense the smoke.

  The smoke detector 1A is configured such that when the sensor 15 senses smoke, that is, smoke flows into a region formed by the cylindrical portion 5A and the bottom plate 15C, and light emitted from the light emitting element 15A is reflected by smoke particles. By reaching the light receiving element 15B, it can be detected that smoke is generated at the place where the smoke detector 1A is installed. Although not shown in the figure, the operating unit 9 is provided with alarm means that can notify the user of the presence of smoke when the smoke detector 1A detects the presence of smoke. To emit. In addition to the light emitting part that is a visual warning means emitting light, the auditory warning means gives a warning so that it is recognized more reliably that a fire has occurred at the place where the smoke detector 1A is installed. The

  When smoke is detected by the detection means, for example, the sensor 15, a detection signal is output from the sensor 15 to the control unit 36. When the control unit 36 determines the generation of smoke by inputting the detection signal, the control unit 36 outputs a control signal to the light emitting unit 41. In response to the input of the control signal, the light emitting unit 41 emits light and blinks.

  Light is emitted from the light emitting unit 41. Even if a part of the light emitted from the light emitting unit 41 is irradiated on the surface where the light emitting unit 41 is installed, the light irradiated on the surface is provided because the reflecting surface 45 is provided on the surface. Is reflected and guided into the light emitting unit 43 and guided through the light emitting unit 43. When the light emitted from the light emitting unit 41 is directly applied to the light emitting unit 43, the light is guided through the light emitting unit 43. The light guided in the light emitting portion 43 is guided to the protruding portion 43A while being totally reflected at the interface between the light emitting portion 43 and the light collecting portion. The light guided in the light emitting portion 43 is radiated from the protruding portion 43A to the outside.

  Thus, since all of the light emitted from the light emitting unit 41 is guided through the light emitting unit 43 and emitted from the projecting part 43A to the outside, light is emitted with high brightness. The alarm effect is great.

  Subsequently, a more specific embodiment is shown in FIGS. 3 to 5 than the embodiment of the smoke detector of the present invention shown in FIGS. In addition, when the member shown in FIGS. 3-5 and the member shown in FIG. 1 are common, the same number is attached | subjected and description may be abbreviate | omitted.

  As shown in FIG. 3, the housing 2 of the smoke detector 1 </ b> B includes a bottomed cylindrical mounting portion 6 and a substantially bottomed cylindrical housing portion 7. The attachment part 6 and the accommodating part 7 are mutually connected so that it may have a fixed space | interval, and the said space | interval comprises the inflow port 10 into which smoke can flow in. The smoke detector 1B is driven by a battery (not shown). A battery cover 16 is attached to the peripheral side surface portion of the accommodating portion 7. Although not shown, a battery attaching portion capable of accommodating a battery is provided behind the battery cover 16 and inside the housing 2. When the battery cover 16 is removed, the battery mounting part is exposed so that the battery can be mounted. A projecting portion 18 in the light emitting portion projects from a bottom surface portion of the housing portion 7, that is, an end surface opposite to the mounting surface of the housing 2. The projecting portion 18 has an octagonal trapezoidal shape such that a portion projecting from the flat surface portion 17 is directed toward the tip and the horizontal cross section becomes smaller. The light emission part is a transparent member formed by the projecting part 18 and an octagonal prism in the housing 2. At the rear end of the transparent member, that is, the end surface opposite to the projecting portion 18, a light emitting portion such as an LED or a high-intensity LED is disposed. Light emitted from the light emitting part, for example, a high-intensity LED (not shown) in the housing 2 is guided in the light emitting part and protrudes from the projecting part 18 projecting from the planar part 17 to the four directions toward the planar part. And emit light.

  Inside the inflow port 10, a ridge top portion 13 and an inner slope 14 in the dam portion 3 are shown. Further, as shown in FIGS. 1 and 3, comb teeth 19 are annularly arranged on the dam top portion 13 of the dam portion 3 so as to have a constant interval. The length of the comb teeth 19 is set so that the upper end portion thereof is in contact with the lower end surface of the attachment portion 6. The comb teeth 19 are members provided so as to be able to prevent an object that may enter and cause the sensor to malfunction, such as insects and dust, and has a column shape. Since the comb teeth 19 are erected with a certain distance from each other, insects, dust and the like are not allowed to enter, but smoke distribution is not hindered.

  FIG. 4 is an external view of the smoke detector 1B shown in FIG. As shown in FIG. 4, the smoke detector 1 </ b> B is provided with a plurality of grooves 20 that cross the bottom surface portion 17. The plurality of groove portions 20 are parallel to each other and have a constant interval. A part of the groove 20 is provided with a notch 21 having various widths in the groove forming direction. Since the notch 21 penetrates the bottom surface portion 17 from the outside to the inside, the inside and the outside of the housing 2 communicate with each other through the notch 21. Since the inside and the outside of the housing 2 are communicated with each other by the notch 21, an audible alarm means 22, for example, a part of a speaker incorporated in the housing 7 can be observed through the notch 21, The alarm generated by the audible alarm means 22 can be made to sound in the space where the smoke detector 1B is installed without being trapped in the housing 2 by the notch 21. A push button 23 is provided in the vicinity of the visual alarm means 18 on the bottom surface portion 23. The push button 23 has a shape that matches the peripheral side surface and the bottom surface portion 17 of the housing portion 7, and is movable in the axial direction of the housing 2. The push button 23 is, for example, a function for stopping an alarm when the visual alarm unit 18 and the audio alarm unit 22 issue an alarm, and a function for confirming whether the visual alarm unit 18 and the audio alarm unit 22 are normally operated. And a function for confirming battery consumption.

  FIG. 5 is a cross-sectional view of the smoke detector 1B shown in FIG. The smoke detector 1B includes a housing 2, a dam part 3, a flow surface 4, and a cylindrical part 5A.

  The housing 2 has a substantially cylindrical shape, and has a mounting portion 6 and a housing portion 7. The attachment portion 6 includes a fixing member 24 that fixes the attachment portion 6 to the installation surface, and a lid body 25 that makes it difficult or impossible to leak the smoke flowing into the housing 2. The fixing member 24 forms a substantially bottomed cylindrical body that opens at one end, and an insertion port 26 is provided at the center. The lid body 25 is a bottomed cylindrical body, and includes a neck portion 27 through which the insertion port 26 is inserted, and a flange 28 provided so as to protrude outward from one end of the neck portion 27. The bottom surface of the lid body 25 and the flange 28 form the internal ceiling surface 11. The neck portion 27 is fitted into the insertion opening 26 and is detachable. However, the neck portion 27 may be fixed, welded, or bonded to the insertion port 26, or may be integrated with the insertion port 26.

  A part of the cylindrical portion 5 </ b> A, the dam portion 3, and the flow surface 4 are integrated as a smoke guiding member 29.

  The smoke guiding member 29 is a substantially bottomed cylindrical body, and has a peripheral side surface portion 30, a dam portion 3 serving as a bottom surface, and a flow surface 4. Further, the smoke guiding member 29 is provided with a through hole 31 at the center thereof. The cylindrical body portion 5 </ b> A is formed by attaching the sealing lid portion 32 to the lower end portion of the through hole 31. A cylindrical body portion 5A protrudes from the lower end portion of the through hole 31, and the lower end opening portion is closed by attaching the sealing portion 32 to the lower end opening portion of the cylindrical body portion 5A. ing.

  In the smoke detector 1B shown in FIG. 5, the flow surface 4 includes a first flow surface 4A, an inclined surface 4B, and a second flow surface 4C. Providing the inclined surface 4B in the middle of the flow surface 4 is preferable because the amount of disturbance light reaching the through hole 31 that is the opening of the cylindrical body portion 5A can be reduced. Since the battery support portion 34 capable of supporting the battery 33 along the axial direction is attached to the inner surface of the bottom surface portion 17, the battery 33 can be accommodated below the inclined surface 4B. Further, an alarm means mounting portion 35 to which the auditory alarm means 22 can be detachably attached is provided on the inner surface of the bottom surface portion 17. The position of the alarm means mounting portion 35 is determined according to the position of the notch portion 21 in FIG. A control unit 36 is attached to the lower end portion and the peripheral side surface of the through hole 31. The control unit 36 has a sensor (not shown), is supplied with driving power from the battery 33, controls the driving of the sensor, determines the presence of smoke based on a signal output from the sensor, and serves as a control signal. An alarm trigger signal can be output to the alarm means. For the control unit 36, a member to which a plurality of functions can be added, such as an integrated circuit, can be used.

  Below, the usage method of the smoke detector 1B and its effect | action are demonstrated.

  First, the smoke detector 1B is installed such that the fixing member 24 of the attachment portion 6 is fixed to the installation surface. As a method of fixing the fixing member 6 to the installation surface, a method of fixing with an adhesive or a wood screw can be used. In addition, when using the smoke detector 1B in a house etc., it is preferable that the installation surface does not have a mounting mark as much as possible when removing the smoke detector 1B from the viewpoint of protecting the interior of the installation location.

  When smoke is generated at the place where the smoke detector 1B is installed, the smoke often circulates along the installation surface. When the smoke flows along the installation surface, the smoke can flow into the housing 2 through the inlet 10.

  The smoke that has flowed into the housing 2 flows along the smoke guiding member 29. More specifically, smoke is guided along the slope of the outer slope 12 toward the interior of the housing 2. Further, after passing over the bank top portion 13, the smoke flows toward the inner region of the housing 2 formed by the inner slope 14, the inner ceiling surface 11, and the flow surface 4. At this time, the comb teeth 19 provided on the bank top portion 13 do not hinder the flow of smoke, so that the smoke flows into the housing 2 smoothly. It is considered that the direction of smoke flow is disturbed because the orifice moves like an orifice when smoke passes over the dam 3. In addition, the dam portion 3 is arranged inside the housing formed by the smoke guiding member 24 and the inner ceiling surface 11 so that the sensor disposed in the control unit 36 does not malfunction due to external disturbance light. Most of the disturbance light entering the area is shielded.

  Subsequently, the smoke that circulates over the dam portion 3 circulates on the first flow surface 4A, the inclined surface 4B, and the second flow surface 4C. In addition, it is thought that the smoke after getting over the dam part 3 gradually decreases in flow rate as it flows through the flow surface 4. Moreover, since the smoke detector 1B is provided with the inclined surface 4B, it is possible to further reduce the disturbance light that enters over the dam portion 3 and enters.

  Next, the smoke that has circulated through the flow surface 4 flows into the cylindrical portion 5A. Since the cylindrical portion 5A protrudes downward, the smoke that has circulated along the flow surface 4 tends to flow into the cylindrical portion 5A. In addition, the smoke which distribute | circulated the distribution surface 4 and the flow velocity fell tends to flow down in 5 A of cylinder parts. Therefore, the smoke can flow into the cylindrical portion 5A, so that the sensor can sense the smoke.

  When the sensor senses smoke, a signal is output from the sensor to the control unit 36 that is electrically connected to the sensor. When a signal from the sensor is output to the control unit 36, a control signal is output to the audible alarm means 22 and the light emitting unit. When a control signal is output to the audible alarm means 22 and the light emitting section, each of the audible alarm means issues an alarm by acoustic or synthesized voice, and light emitted from the light emitting section is guided in the light emitting section main body. The emitted light is emitted from the protrusion 18. Therefore, the user can recognize that smoke is generated at the place where the smoke detector 1B is installed.

  The smoke detector of the present invention is not limited to the embodiment shown in the drawings, and various design changes are possible as long as the object of the present invention can be achieved.

FIG. 1 is a partially cutaway sectional view showing an embodiment of a smoke detector of the present invention. FIG. 2 is a cross-sectional view showing an example of the lighting device of the present invention. FIG. 3 is a front view showing another embodiment of the smoke detector of the present invention. FIG. 4 is a front view showing the bottom surface of the embodiment shown in FIG. FIG. 5 is a cross-sectional view of the embodiment shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A, 1B Smoke detector 2 Housing | casing 3 Weir part 4 Flow surface 4A 1st flow surface 4B Inclined surface 4C 2nd flow surface 5A Cylindrical part 5B Notch part for optical paths 6 Attachment part 7 Accommodation part 8 Installation surface 9 Actuation part 10 Inlet 11 Internal ceiling surface 12 Outer slope 13 Embankment portion 14 Inner slope 15 Sensor 15A Light emitting element 15B Light receiving element 15C Bottom plate 16 Battery cover 17 Bottom face portion 18 Visual alarm means 19 Comb teeth 20 Groove portion 21 Notch portion 22 Auditory alarm Means 23 Push button 24 Fixing member 25 Cover body 26 Insertion port 27 Neck part 28 Flange 29 Smoke guide member 30 Circumferential side part 31 Through hole 32 Sealing part 33 Battery 34 Battery support part 35 Alarm means attachment part 36 Control part 40 Lighting device 41 light emitting part 41 light collecting part 43 light emitting part 43A projecting part 44 smoke introducing substrate 45 reflecting surface

Claims (8)

A housing having a mounting surface and a flat portion formed on the opposite side of the mounting surface;
A light emitting unit provided in the housing;
A light collecting unit for collecting light emitted from the light emitting unit;
A lighting device comprising: a light emitting part that projects from the flat part and emits light collected by the light collecting part.   The lighting device according to claim 1, wherein the light emitting unit is a high-intensity LED.   3. The lighting device according to claim 1, wherein the light-emitting portion is formed of a transparent solid body, and a portion of the light-emitting portion that protrudes from the planar portion of the housing has a polygonal trapezoidal shape. .   The said condensing part is a cylinder which can incorporate the said light emission part, The inner surface of the cylinder forms the light reflection surface, The said any one of Claims 1-3 formed Lighting device.   A smoke detector comprising the lighting device according to any one of claims 1 to 4.   The detection means which detects the smoke which flowed in into the inside from the inflow opening established in the said mounting surface vicinity in the surrounding side surface of the said housing | casing in the lighting device of any one of the said Claims 1-4, and the said detection means The smoke detector according to claim 5, further comprising: a control unit that controls the light emitting unit based on a detection signal output from the sensor. The casing has a peripheral side surface by having an interval between a mounting substrate, a bottomed cylindrical body having a flat surface which is an outer surface of the bottom, and a lower end edge of the mounting substrate and an upper end edge of the bottomed cylindrical body. An inlet formed so as to make a circuit, and a smoke introduction substrate for guiding smoke flowing into the interior from the inlet,
The detection means is a light emitting element and a light receiving element,
The light receiving element can receive light emitted from the light emitting element, and has a cylindrical body portion that opens to a surface of the smoke introduction substrate facing the attachment substrate and extends to the opposite side of the attachment substrate. The smoke detector according to claim 5 or 6.   The smoke detector according to claim 7, wherein the smoke introduction substrate includes a dam portion located inside the housing so as to face the inflow port.

Images