CN102096979B

CN102096979B - Photoelectric smoke detector

Info

Publication number: CN102096979B
Application number: CN201110026301.8A
Authority: CN
Inventors: 冈田昭雄
Original assignee: Nohmi Bosai Ltd
Current assignee: Nohmi Bosai Ltd
Priority date: 2008-03-26
Filing date: 2009-01-22
Publication date: 2014-05-07
Anticipated expiration: 2029-01-22
Also published as: TW200941415A; KR101475086B1; TWI475519B; CN102096979A; KR20090102628A

Abstract

The present invention provides a photoelectric smoke detector, which is capable of removing certain stray light. The detector has a black box (4) provided with a luminous element containing section (45) for containing LED (60) as luminous element; and holes arranged in front of the luminous element containing section (45); the holes include a plurality of holes (61, 62) having different distances to the LED (60), and opening sizes of the holes in width direction increase proportionally to increase of the distances to the LED (60).

Description

Photo-electric type smoke detector

The application is to be the divisional application that on January 22nd, 2009, denomination of invention are the patented claim of " 200910006005.4 " for " photo-electric type smoke detector ", application number the applying date.

Technical field

The present invention relates to a kind of photo-electric type smoke detector, the structure in the hole particularly arranging in light-emitting component front.

In addition, the present invention relates to a kind of photo-electric type smoke detector, particularly the structure of the case of screening of storage light receiving element.

Background technology

In photo-electric type smoke detector, in camera bellows, be provided with light emitting element storing portion, for receiving the light emitting diode (below also referred to as LED) as light-emitting component, in the front of this incorporating section, be provided with hole, for limiting the direct of travel of the light sending from LED.

In addition, in photo-electric type smoke detector, as the photodiode (hereinafter referred to as PD) of light receiving element, receive the faint scattered light being caused by cigarette and carry out smoke detection, so in order to make its impact that is not subject to electrical interference, utilize the case of screening to cover.When assembling comprises the optical system of this PD, be according to first PD being inserted to optical substrate in the past, then insert the order of the case of screening and assemble, therefore need independent mounting parts (for example, with reference to patent documentation 1) respectively.

No. 2003-141653, [patent documentation 1] Japanese Patent Publication communique JP

Photo-electric type smoke detector is in the past because being only provided with a hole, so there is the problem that can not remove certain parasitic light.

In addition, when the optical system of photo-electric type smoke detector in the past of assembling, as mentioned above, because of needs, assemble respectively and process PD and the case of screening, so must increase during millwright.

Summary of the invention

In order to address the above problem, the object of the present invention is to provide a kind of photo-electric type smoke detector that can remove certain parasitic light.

In addition,, in order to address the above problem, the present invention also aims to provide a kind of photo-electric type smoke detector that can reduce the man-hour while assembling optical system.

A kind of photo-electric type smoke detector provided by the invention, there is camera bellows, in light receiving element incorporating section in described camera bellows, be accommodated with light receiving element and cover the case of screening of the tubular of this light receiving element, the described case of screening is to be formed by a plate bending machining, the described case of screening comprises front plate, top board and the backplate of continuous formation, and two side plates that form continuously with described front plate; The described box-shaped of screening becomes, at the sidepiece of described two side plates back side one side separately, form a pair of tongue piece at above-below direction, by below described tongue piece under the state of described backplate one lateral buckling, bend described backplate, by the described tongue piece of bending top, fix described backplate; On the described backplate of the described case of screening, be provided with by pressing spring portion, for applying to the inside acting force, described light receiving element pressed to front plate one side; Describedly by pressing spring portion, be formed as, a part for described backplate be longitudinally cut into triangle and to described front plate one lateral buckling; In the position of described two side plates of the described case of screening bottom that is equivalent to described light receiving element separately, be formed with the protuberance of projection to the inside; The described protuberance forming respectively on described two side plates of described light receiving element by the described case of screening and describedly keep by pressing spring portion.

According to the present invention, hole comprises the multiple holes different apart from the distance of light emitting diode, and the opening size of the plurality of hole on Width increases and increases pro rata with the distance apart from light emitting diode, so advance after being drawn in by multiple holes from the light of light emitting diode, can remove certain parasitic light.

In addition, according to the present invention, multiple holes are arranged on optical substrate one side that forms camera bellows, and comprise the mutually different hole at the He top, hole of bottom one side opening one side opening, so metal pattern structure in the time of can utilizing resin forming, needn't increase cost and just can form multiple holes, and can improve the effect in hole.

In addition, according to the present invention, at the back side of the case of screening, be provided with by pressing spring portion, for applying to the inside acting force, light receiving element pressed to front plate one side, by pressing light receiving element by pressing spring portion, light receiving element becomes one with the case of screening.Thus, the light receiving element incorporating section that integrated light receiving element and the case of screening can be inserted to optical system simultaneously.Therefore the man-hour in the time of, can reducing assembling optical system.In addition, when using photo-electric type smoke detector, because by pressing light receiving element by pressing spring portion, so light receiving element can not rock in the case inside of screening.

In addition, in the present invention, described in the case of screening be to be formed by a plate bending machining, therefore can reduce the number of parts for the manufacture of the case of screening, make its manufacture become easy.

Accompanying drawing explanation

Fig. 1 is outside drawing and the b-b sectional view thereof of the photo-electric type smoke detector of one embodiment of the present invention.

Fig. 2 is the exploded perspective view of the photo-electric type smoke detector of Fig. 1.

Fig. 3 is the exploded perspective view of the photo-electric type smoke detector of Fig. 1.

Fig. 4 is the exploded perspective view of camera bellows.

Fig. 5 is the figure that represents optical substrate concrete structure.

Fig. 6 is the stereographic map that is illustrated in the concrete structure in the hole of LED front formation.

Fig. 7 is the sectional view of extracting out after peripheral part of LED of Fig. 5 (c).

Fig. 8 is the action specification figure in hole.

Fig. 9 represents to screen the figure of case concrete structure.

Figure 10 is the sectional view that is equipped with the major part under the state of lid in main body.

Figure 11 is the sectional view that the warning horn main body of Figure 10 is arranged on the major part under the state on installing plate.

Figure 12 represents that warning horn main body is arranged on the sectional view of the major part of the state on installing plate (variation).

The explanation of Reference numeral

1 main body; 2 lids; 3 installing plates; 4 camera bellows; 21 plumes enter window; 22 buttons; 23 peristomes; 24 alert speaker; 41 printed base plates; 42 touch-switchs; 43 optical substrates; 44 optical substrate lids; 44a cigarette gateway; 44b fly net; 45 light emitting element storing portions; 46 light receiving element incorporating sections; 47 labyrinth type members; 48 casees of screening; 49PD; 50 front plate; 50a peristome; 51 top boards; 52 backplates; 52a presses pressing spring portion; 52b installation portion; 53,54 side plates; 53a, 53b, 54a, 54b tongue piece; 53d, 54d protuberance; 60LED; 61 first holes; 62 second holes; 100 warning horn main bodys; 113 substrates; 114 perisporiums; 115,115a, 115b blade (holding section); 116a, 116b through hole; 119 screw via holes; 121 bowl-shaped part; 123 perisporiums; 124,124a, 124b, 125,125a, 125b surround wall; 129 screw holes; 132 substrates; 133 perisporiums; 134 inwalls; 135a, 135b sword receiving portion (engaged part); 136a, 136b screw via hole.

Embodiment

Fig. 1 (a) and (b) are outside drawing and b-b sectional views thereof of the photo-electric type smoke detector of one embodiment of the present invention.Fig. 2 and Fig. 3 are the exploded perspective views of the photo-electric type smoke detector of Fig. 1.Fig. 2 is the stereographic map while observing from top, and Fig. 3 is the stereographic map during from beneath.In addition, in Fig. 1 (b), omitted inner a part of part.

This photo-electric type smoke detector comprises: main body 1, is equipped with for detection of fires etc. and drives the electronic component (illustrating in detail) of alert speaker; Lid (over cap) 2, main body covered 1; And installing plate 3, be limited to the back side of main body 1, there is the screw hole etc. that use is installed to ceiling etc., between main body 1 and lid 2, be accommodated with camera bellows 4, camera bellows 4 lift-launchs have the part (concrete condition will be described later) of cigarette test section function.Lid 2 has: multiple plumes enter window 21, and the plurality of plume enters window 21 and is positioned at the top of covering 2, for the cigarette that becomes detected object is come in and gone out; And peristome 23, for making a part for button 22 outstanding.One end of button 22 is rotated and is supported on freely the inwall that covers 2, and the other end, by engagement, by pressing the position outstanding from peristome 23, makes touch-switch 42 described later carry out ON Action.In addition, alert speaker 24(is with reference to Fig. 3) be arranged on the inwall of this lid 2.

Main body 1 comprises the perisporium 114 that the substrate 113 of circular plate type and the neighboring at substrate 113 uprightly arrange to the back side one side, upper edge (installing plate 3 one sides) at perisporium 114 is provided with blade 115a, 115b as the pair of plates shape of holding section, blade 115a, the 115b of described pair of plates shape are opposite and extend and arrange to the inside, under blade 115a, the 115b of substrate 113, be provided with through hole 116a, 116b, be used to form the undercut portion of blade 115a, 115b.

Lid 2 comprises the perisporium 123 that the bowl-shaped part 121 of cardinal principle chevron and the neighboring in bowl-shaped part 121 arrange, in the inner side of perisporium 123, corresponding with the through hole 116a, the 116b that form on substrate 113 in main body 1, be provided with encirclement wall 124a, the 124b of コ font substantially, when lid 2 is installed in main body 1, the leading section that surrounds wall 124a, 124b is positioned at and substrate 113 butts of main body 1 or approaching position.By main body 1 with multiple screws, be combined in integratedly the lid 2 in this main body 1, form the warning horn main body 100 as detector body.

Installing plate 3 has: the substrate 132 of circular plate type; Perisporium 133, is arranged on main body 1 one sides of the neighboring of substrate 132; And inwall 134, arrange with one heart with perisporium 133, on position in inwall 134 upper edge corresponding to the blade 115a, the 115b that arrange in main body 1, be provided with sword receiving portion 135a, 135b as engaged part, described sword receiving portion 135a, 135b to outer circumferential side extend arrange, and and perisporium 133 between g spaced apart.

In the bottom of camera bellows 4, printed base plate 41 is installed, on this printed base plate 41, touch-switch 42 is installed.By operating described button 22, this touch-switch 42 is switched on.In addition, if cigarette detected, alert speaker ring is moving, when removing this ring when moving or operate this button 22 during maintenance.According to Fig. 4, the concrete structure of this camera bellows 4 is described in detail below.

Fig. 4 is the exploded perspective view of camera bellows 4.

Camera bellows 4 comprises optical substrate 43 and covers the optical substrate lid 44 of this optical substrate 43.On optical substrate 43, be provided with light emitting element storing portion 45, light receiving element incorporating section 46 and multiple labyrinth type member 47.Angle configurations between light receiving element incorporating section 46 and light emitting element storing portion 45 becomes to make not to be directly incident in light receiving element incorporating section 46 from the light of light emitting element storing portion 45.In light emitting element storing portion 45, light-emitting component is installed, the LED60 of for example bullet cut.In addition, in light receiving element incorporating section 46, be provided with and be accommodated in the PD49 screening in case 48.On optical substrate lid 44, be formed with multiple cigarettes gateway 44a, in addition, on the 44a of cigarette gateway, be provided with fly net 44b, prevent that the foreign matters such as insect from entering in camera bellows 4.

Fig. 5 is the figure that represents the concrete structure of optical substrate 43, (a) is front view, is (b) vertical view, is (c) the c-c sectional view of (b), is (d) the d-d sectional view of (a), (e) is side view, is (f) rear view.

Fig. 6 is the stereographic map of concrete structure that is illustrated in the hole that the front of LED60 forms, and Fig. 7 is the sectional view of extracting LED60 peripheral part in the sectional view of Fig. 5 (c) out.

LED60 is arranged in light emitting element storing portion 45, in its front, is formed with respectively the first hole 61 and the second hole 62 on optical substrate 43.The first hole 61 combinations shape circular and part opening below this circular portion.In addition, the second hole 62 is that combination is circular and in the shape of the upper opening of this circular portion.In Fig. 6, conclusivelyed show the shape in the second hole 62, and the first hole 61 is by the shape after the lower reversion in shape in the second hole 62 of Fig. 6.In addition, the opening size (Width) in the first hole 61 and the second hole 62 is along with increasing and increase pro rata with the distance of LED60.

Fig. 8 is the action specification figure in hole.

The effect of drawing the light that sends from LED60 in is played in the hole forming in LED60 front, but scattering likely can occur the light of encountering hole, causes its direction outside anticipation to be advanced.But the

hole

61,62 of present embodiment is dual structure, encounter from LED60 and observe the light that is positioned near the member 61a of surrounding in the first hole 61 of position it and be reflected, because encountering to observe to be positioned at than the first hole 61 from LED60, away from the member 62a of surrounding in the second hole 62 of LED60 position, be reflected, so can draw the light being reflected by the first hole 61 in.

In addition, because the opening size (Width) in the first hole 61 and the second hole 62 is along with the distance apart from LED60 increases and increases pro rata, so as shown in Figure 7, the light sending from LED60 is suitably drawn in, to predetermined direction, advance, be irradiated to the inside of camera bellows 4.

In addition, the first hole 61 combinations shape circular and part opening below this circular portion, the second hole 62 is that combination is circular and in the shape of the upper opening of this circular portion, above or below be unlimited shape, but LED60 has corresponding in the horizontal direction position relationship with PD49, even if produce scattered light on above-below direction, also can be ignored, as long as restriction left and right directions (horizontal direction) scattered light just enough, so above or below be that unlimited shape does not exist drawback.

Fig. 9 represents to screen the figure of case 48 concrete structures, (a) is front view, is (b) right view, is (c) rear view, is (d) upward view.

The case 48 of screening cuts off a sheet material to be bent to form tubular, it comprises front plate 50, top board 51, backplate 52 and

side plate

53,54, front plate 50 is continuous with top board 51 and backplate 52, and in addition, front plate 50 is continuous with side plate 53 and side plate 54.On the top of front plate 50, be formed with peristome 50a, by this peristome, 50a offers built-in PD49 by scattered light.At the sidepiece of backplate one side of

side plate

53 and 54, at above-below direction, be formed with respectively a pair of

tongue piece

53a, 53b, 54a, 54b.Both sides at

tongue piece

53b, 54b are formed with respectively breach 53c, 54c, and

tongue piece

53b, 54b are easily bent, and make

tongue piece

53b, 54b under bending state above with the end of

tongue piece

53b, 54b on a

face.By tongue piece

53b, 54b under the state of backplate one lateral buckling (position of bending than the end of

side plate

53,54 near inner side), then bend backplate 52.Under this state, by bending

tongue piece

53a, 54a, fix backplate 52.That is, by

tongue piece

53a, 54a and

tongue piece

53b, 54b, clamp backplate 52, make not produce gap between backplate 52 and side plate 53,54.In addition, be equivalent to the position of PD49 bottom on

side plate

53,54, be formed with protuberance 53d, the 54d of projection to the inside, they keep PD49 with described later together with the 52a of pressing spring portion.

On the backplate 52 of case 48 of screening, be formed with the 52a by pressing spring portion, it is that a part for backplate 52 is longitudinally cut into triangle, and to front plate 50 1 lateral bucklings.Should PD49 be pressed to front plate 50 1 sides by the 52a of pressing spring portion.In addition, the bottom of plate 52 is provided with installation portion 52b overleaf, for inserting light receiving element incorporating section 46 and being arranged on printed base plate 41.In addition,, except installation portion 52b, the terminal 49a of PD49 also gives prominence to downwards and exposes from the bottom of the case 48 of screening.

As shown in Figure 4, the case 48 and be accommodated in this PD49 screening in case 48 and kept integratedly of screening forming as mentioned above, is accommodated in light receiving element incorporating section 46, and is waited and be fixed on printed base plate 41 by welding.

The photo-electric type smoke detector of present embodiment forms as mentioned above, and by making the luminous supervision fire of LED60, but at ordinary times, the light of LED60 does not enter PD49.When abnormal, i.e. during breaking out of fire, cigarette enters window 21 through plume and flows in camera bellows 4 from cigarette gateway 44a, with the light collision of sending from LED60, scattering occurs, and causes the course of described light to change, and makes a part for this scattered light enter PD49.If the scattered light that enters PD49 exceedes the amount of regulation, by not having illustrated control gear to make alert speaker 24 rings moving.

In the present embodiment, hole consists of the different multiple holes of the distance apart from LED60, and the opening size in multiple holes (Width) is along with increasing and increase pro rata with the distance of LED60, so the light from LED60 is drawn in and advances by

multiple hole

61,62, and can remove certain parasitic light.In addition, first and

second hole

61,62 is formed on optical substrate 43 1 sides that form camera bellows 4, and the first hole 61 of bottom one side opening is different with the second hole 62 of top one side opening, so die structure in the time of can utilizing resin forming for example, by two metal patterns are formed to multiple holes from sandwich, therefore easily manufacture and do not increase cost and just can form multiple holes 61,62.In addition, also can play the effect that the light sending from LED60 is drawn at above-below direction.

In addition, in the above description, as an example of the first 61 bottom, hole one side opening, the second 62 top, hole one side opening example, be illustrated, but can be also contrary.That is, can make the first 61 top, hole one side opening, make the second 62 bottom, hole one side opening.In addition as long as the parasitic light of left and right directions (horizontal direction) can be limited in hole of the present invention, so can suitably set according to this object the form in

hole

61,62, for example, can be also triplen.

In addition, in the present embodiment, protuberance 53d, the 54d of the

side plate

53,54 by the case 48 of screening and keep PD49 by the 52a of pressing spring portion so they can be processed as a part, can reduce work hours when assembling.In addition, when photo-electric type smoke detector is used, by the case 48 of screening by the 52a of pressing spring portion, press PD49, PD49 can not rock in the inside of the case 48 of screening.In addition, by a sheet material is cut off and be bent to form the case 48 of screening, can avoid number of parts to increase, thereby be used in the part number of packages minimizing of manufacturing the case 48 of screening, manufacture and become easy.

In addition, in the above description, take protuberance 53d, the 54d of the

side plate

53,54 by the case 48 of screening with by the 52a of pressing spring portion, keep PD49 to be illustrated as example, but the invention is not restricted to this, can only utilize by the 52a of pressing spring portion and keep PD49.

In addition, in said embodiment, the fire alarm that uses house to use is illustrated as photo-electric type smoke detector, but the invention is not restricted to this, and the present invention also goes for the fire detector being connected with fire signal receiver by signal wire etc.

Below, to surrounding wall 124a, 124b, describe.Surround wall 124a, 124b and be arranged at and cover on 2, its objective is and when assembling waits, prevent that screw etc. is from falling in warning horn main body 100 at through hole 116a, the 116b of main body 1 formation.

Then, the assembling of the fire alarm to said structure and an example to the order of the installations such as ceiling describe.In addition, on lid 2, printed base plate 41, alert speaker 24 and button 22 etc. are installed.

First, the perisporium of lid 2 123 is chimeric with the periphery of main body 1, the screw of the screw via hole 119 that connects main body 1 is screwed into the screw hole 129 that covers 2, both are combined into one and assemble.

State representation now in Figure 10 (in addition, in the following description, sometimes omit with Reference numeral a, b).As shown in the figure, the through hole 116 being arranged on the substrate 113 of main body 1 seals by being arranged on the encirclement wall 124 building on 2, with the internal insulation of warning horn main body 100 with printed base plate 41 grades.

By screw via hole 136a, 136b, installing plate 3 is screwed on ceiling face etc., by blade 115a, the 115b of main body 1 with chimeric along the state and the installing plate 3 that circumferentially stagger with sword receiving portion 135a, 135b, then along circumferential rotation, make blade 115a, 115b be limited to sword receiving portion 135a, 135b warning horn main body 100, thereby the warning horn main body 100 of assembling is as mentioned above installed on installing plate 3.State representation is now in Figure 11.

When warning horn main body 100 is taken off from installing plate 3, warning horn main body 100 is rotated in the opposite direction, blade 115a, 115b are departed from from sword receiving portion 135a, 135b.

According to present embodiment, even if the wisps such as screw fall into through hole 116a, the 116b of main body 1, also just rest on and surround in wall 124a, 124b, can not enter in warning horn main body 100, so needn't carry out the meaningless apportioned effort for taking out screw etc., therefore can improve the operating efficiency of assembling.

In addition, also can not cause fault because screw etc. falls in warning horn main body 100, and be arranged on after house etc., insect and dust etc. also can not enter in warning horn main body 100 from through hole 116a, 116b, so the confidence level of fire alarm is higher.

In addition, represented that utilization is arranged on the encirclement wall 124a, the 124b that cover on 2 and seals the through hole 116a on the substrate 113 that is arranged on main body 1, the situation of 116b, but also the encirclement wall 125 of sealing through hole 116a, 116b can be arranged in main body 1 as shown in figure 12.

; with be arranged on the face of the contrary side of blade 115 of substrate 113 of main body 1; around through hole 116, at least the edge part of central part one side and the edge part of its both sides arrange and surround wall 125; when lid 2 is assemblied in main body 1, surrounds the height of leading section and the internal face butt of lid 2 of wall 125 or approach.In addition, in Figure 12, can delete with the encirclement wall 125a arranging on the edge part of the relative side of edge part of central part one side of through hole 116.

As mentioned above, this fire alarm is characterised in that, it comprises warning horn main body 100 and installing plate 3, warning horn main body 100 comprises main body 1 and lid 2, described main body 1 has at the back side of substrate 113 and uprightly arranges, towards the blade 115a as holding section of inner side, 115b, and at the holding section of described substrate 113 (blade) 115a, under 115b, be formed with through hole 116a, 116b, lid 2 has bowl-shaped part 121, and be combined integratedly with described main body 1, installing plate 3 have as with the holding section 115a of this warning horn main body 100, the sword receiving portion 135a of the engaged part of 115b engaging, 135b, installing plate 3 is fixed on ceiling etc., on described lid 2, be provided with and surround wall 124a, 124b, surround wall 124a, 124b uprightly arranges on internal face towards described main body 1 one sides, surround the through hole 116a of described main body 1, 116b.

In addition, this fire alarm is characterised in that: replace the encirclement wall 124a, the 124b that are arranged on described lid 2, through hole 116a on the substrate 113 that is formed at described main body 1, the front side of 116b, uprightly arrange and surround wall 125a, 125b towards described lid 2 one sides.

Adopt said structure, the wisps such as screw can not fall in warning horn main body 100, therefore do not need to carry out meaningless apportioned effort, thereby can improve the efficiency of assembling work.

In addition, can in warning horn main body 100, not cause fault because screw etc. falls into, and be installed to after house etc., insect and dust etc. also can not enter in warning horn main body 100 from through hole, so warning horn is with a high credibility.

In the above description, represented to apply the present invention to the situation of illustrated fire alarm, but be not limited to this, the present invention also can be applied to the fire alarm of other structures.In addition, the present invention can also be applied to and use gas detection section to use in other other warning horns of test section as the gas leakage warning horn of test section etc.

Claims

1. a photo-electric type smoke detector, has camera bellows, is accommodated with light receiving element and covers the case of screening of the tubular of this light receiving element in the light receiving element incorporating section in described camera bellows, and described photo-electric type smoke detector is characterised in that:

The described case of screening is to be formed by a plate bending machining;

The described case of screening comprises front plate, top board and the backplate of continuous formation, and two side plates that form continuously with described front plate;

The described box-shaped of screening becomes, at the sidepiece of described two side plates back side one side separately, form a pair of tongue piece at above-below direction, by below described tongue piece under the state of described backplate one lateral buckling, bend described backplate, by the described tongue piece of bending top, fix described backplate;

On the described backplate of the described case of screening, be provided with by pressing spring portion, for applying to the inside acting force, described light receiving element pressed to front plate one side;

Describedly by pressing spring portion, be formed as, a part for described backplate be longitudinally cut into triangle and to described front plate one lateral buckling;

In the position of described two side plates of the described case of screening bottom that is equivalent to described light receiving element separately, be formed with the protuberance of projection to the inside;

The described protuberance forming respectively on described two side plates of described light receiving element by the described case of screening and describedly keep by pressing spring portion.