KR20080042639A - Fire detector - Google Patents

Abstract

A smoke type fire detector is provided to improve operation reliability of a light emitting source and a light receiving sensor by attenuating an inputted beam using blocking bumps. Plural blocking bumps(121) are formed on outer concentrical circles on a bottom surface of a dark room(120). A light emitter receiving chamber(123) and a light receiver sensor receiving chamber(125) are formed in the dark room. Light emitters, which are contained in the light emitting receiving chamber, are fixed by a light emitter cover(122). A light receiver sensor cover(124) fixes light receiver sensors, which are contained in the light receiver sensor receiving chamber. The dark room is enclosed by a dark room cover(110) and forms a blocking space. Blocking bumps(111) are formed on outer concentrical circles on a bottom surface of the dark room cover. The dark room cover is fixed inside a main body(100) by using a fixing pin and a fixing hole.

Description

Smoke detector

1 is a smoke smoke detector and other perspective views

Figure 2 is a conventional smoke detector

Figure 3 is an upward configuration of the present invention

Figure 4 is a downward configuration of the present invention

5 is a configuration reference diagram of the present invention

※ Explanation of symbols for main parts of drawing

100 Body 101 Blocking protrusion

102 Inlet 110 Darkroom Cover

111 Blocking protrusion 120 Darkroom

121 Blocking Projection 122 Light Emitting Circle Cover

123 Light Emitting Chamber 124 Receiver

125 Receiver Sensor Room 130 Circuit Board

131 Terminal Insert 140 Cover

141 Fixing protrusion 200 Body

210 Darkroom 211 Guide Feather

220 Cover 230 Blocker

231 small hole 300 base

301 terminal 302 terminal

The present invention relates to a smoke-type fire detector, and more specifically, it is classified into a photoelectric fire detector and an ionized fire detector according to a means for detecting a change in concentration of the incoming smoke.

Photoelectric fire detectors detect smoke concentrations that are changed by light sources and light-receiving sensors. Ionization detectors detect changes in smoke concentrations using materials of the americ isotope.

Smoke type fire detector converts smoke concentration change into a predetermined electrical signal when a fire occurs, and an electric circuit converting the signal into an electrical signal has been filed by the applicant of the Korean Patent Office on November 3, 2006. Since there is no direct relationship, the illustration and description are omitted.

As shown in Fig. 1, the smoke detector is configured to be electrically connected to the terminals 301 and 302 of the base 300 fixed at the attachment position.

Regarding the structure of the base, the present application has registered a large number of Korean Utility Model Registration 10-0317736 and the like, and detailed description is omitted since it is not directly related to the present invention.

At this time, since the occurrence of a fire is detected by the change in the concentration of the smoke flowing from the inlet 102 of the main body 100, it is necessary to effectively block the inflow of fine dust and small insects from the inlet 102, which may affect the change of the concentration. And attenuate the light coming from the inlet hole.

In the prior art, as shown in FIG. 2, a plurality of guide feathers 211 are formed on the outer circumferential surface of the dark chamber 210 installed inside the main body 200, and the blocking plate 230 is formed on the outer surface of the guide feather 211. ) Is surrounded.

In this case, the blocking plate 230 has no obstacle to the inflow of smoke, and the small hole 231 for preventing the inflow of fine dust and small insects is perforated or corroded.

The upper surface of the dark room 210 in which the blocking plate 230 is installed is closed by the cover 220.

The purpose of closing the dark room 210 is to effectively block the light flowing from the outside, even if a small light flows in order to prevent a malfunction by hitting and attenuating many obstacles to the straightness of the light.

As described above, the smoke type smoke detector has no obstacle to the inflow of smoke into the dark room 110 and 210 and requires a means to effectively block the inflow of fine dust and insects, and also to block the light effectively.

However, in the prior art, small holes 231 are formed in the blocking plate 230 by means of perforation and corrosion in terms of productivity and economy in a 0.3 mm stainless steel plate. There is a fatal defect in which light flowing through the small hole 231 is reflected from the inside due to the manufacture of the 230.

Accordingly, the present invention has been devised a method that can effectively block the influx of light and fine dust and insects without any obstacle to the inflow of smoke.

As shown in FIGS. 3 and 4, a plurality of blocking protrusions 121 are formed on the outer concentric circles of the bottom surface of the dark room 120, and a light emitting source accommodating chamber 123 and a light receiving sensor accommodating chamber 125 are formed therein. Let's do it.

The light receiving sensor (not shown) accommodated in the light emitting source accommodating chamber 123 is seated and fixed by the light emitting source cover 122, and the light receiving sensor accommodated in the light receiving sensor accommodating chamber 125 on the opposite side is connected to the light receiving sensor cover 124. It is seated and fixed.

The dark room 120 configured as described above is closed by the dark room cover 120 to form a blocking space. At this time, the dark room cover 110 is formed with a blocking projection 111 on the outer surface concentric circles of the bottom surface and the guide feather 112 is formed on the inner side.

The dark room 120 and the dark room cover 111 integrally formed are fixed to the inside of the main body 100 by the fixing pin 104 and the fixing hole 128.

Blocking protrusions 101 formed in the main body 100, as shown in FIG. 5, the blocking protrusions 111 and 121 of the dark room 120 and the dark room cover 110 are constructed while maintaining a clearance.

The light emitting source and the lead wire (not shown) of the light receiving sensor, which are fixed and fixed inside the dark room 120 fixed integrally with the main body 100, are inserted into the insertion hole 132 of the circuit board 130 and soldered to the circuit. The substrate 130 is fixedly fixed to the protrusion 129 of the connection terminal 127 fixed to the bottom surface of the dark chamber 120.

In the circuit board on which the electronic component is soldered and fixed, the cover 140 is fixed to the main body by the fixing pin 141 and the fixing hole 105 for protection.

In the smoke detector configured as described above, the terminals 301 and 302 and the connection terminal 127 of the base 300 fixed to the attachment position are electrically connected and fixed to constitute an electrical circuit.

As described above, the smoke type smoke detector is classified into a photoelectric fire detector in which a light emitting source and a light receiving sensor are installed, and an ionized fire detector in which an americium isotope is installed.

The structure of the dark room for the inflow of smoke and the prevention of fine dust and small insects has the same purpose and effect, and thus shows and describes the configuration of the photoelectric fire detector. However, the description of the ionized smoke detector is omitted. .

In the process of manufacturing the injection mold such as the main body 100, the dark chamber 120, the dark cover 110, etc., rather than the conventional means of perforation and attachment, an appropriate number of blocking protrusions 101, 111, 121 are formed at the proper positions to assemble the product. As a method for blocking the inflow of dust and the influx of small insects using a gap through the gap is devised, a predetermined gap can be easily obtained effectively.

Furthermore, the gap structure as shown in FIG. 5 prevents the linearity of the incoming light from being attenuated by the obstacle effect between the blocking projections 101, 201 and 301 so as not to affect the light emitting source (not shown) and the light receiving sensor (not shown).

The fire detectors produced in this way can be expected to have many economically significant effects and development effects in related industries by ensuring the simplification and reliability of the production process.

Claims (1)

Smoke smoke detector for detecting a change in the concentration of smoke flowing into the dark room 110 Smoke smoke detector consisting of a combination of at least one block of projections (101, 111, 121).

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