CN101826245B

CN101826245B - Fire alarm device

Info

Publication number: CN101826245B
Application number: CN2009101783794A
Authority: CN
Inventors: 冨田寿幸
Original assignee: Nohmi Bosai Ltd
Current assignee: Nohmi Bosai Ltd
Priority date: 2009-03-06
Filing date: 2009-11-25
Publication date: 2012-12-12
Anticipated expiration: 2029-11-25
Also published as: KR20100100573A; TW201033944A; JP2010211279A; JP5230489B2; CN101826245A; TWI438722B

Abstract

The invention provides a fire alarm device which has small box body diameter and large alarm sound pressure. The fire alarm device comprises a protecting cover having a dark box placing part which prostrudes to one side of the front into a cylinder shape and is provided with a smoke flow inlet window at the side and an audio component placing part which is formed with an audio hole outside the dark box placing part; a dark box which is placed in the dark box placing part; an audio component which is placed in the audio component placing part; a printed circuit board which is arranged at one side of the back of the dark box; a main body which can fix the dark box, the audio component and the printed circuit board between the main body and the protecting cover; wherein, the audio component is arranged at one side of the back of the dark box, a first rib part is arranged from one side of the back on the protecting cover, the first rib part is connected with an outer edge part of the audio component which is not overlapped with the dark box, a second rib part is arranged at one side of the back of the dark box, and the second rib part can enclose the peripheral of the audio component which is overlapped with the dark box.

Description

Fire-alarm

Technical field

The present invention relates to the fire-alarm that a kind of one possesses sensor part and warning portion.

Background technology

Fire-alarm in the past has the sensor part of detection of fires and the warning portion that when detecting fire with sensor part, gives the alarm in flat box-shaped body set inside.The sound equipment member of the camera bellows of sensor part and warning portion is configured in body interior (for example opening 2004-362537 number with reference to the open communique spy of Jap.P.) with nonoverlapping mode.

, in fire-alarm in the past, owing to dispose camera bellows and sound equipment member with nonoverlapping mode, therefore, and box body diameter increase and be inconvenient to operate, and very showy when being arranged on ceiling etc., diminish the attractive in appearance of room.So consider to make the part of sound equipment member and camera bellows is overlapping and be configured in the sound equipment member back side one side of camera bellows.Owing to a part that sounds the alarm from the sound equipment member is propagated at box house, therefore can not guarantee the acoustic pressure of stipulating after running into the back side of camera bellows.

Summary of the invention

In order to solve above-mentioned problem, the object of the present invention is to provide a kind of big fire-alarm of acoustic pressure that can reduce box body diameter and make alarm song.

Fire-alarm of the present invention comprises: over cap; Has dark box placing part and the sound equipment member is laid portion; Said dark box placing part protrudes tubular and has plume in the side of this dark box placing part to the fire-alarm front goes into window, and said sound equipment member is laid portion and formed the sound equipment hole in the said dark box placing part outside; Camera bellows is placed in the said dark box placing part; The sound equipment member is placed in said sound equipment member and lays in the portion; Printed-wiring board (PWB) be configured in the back side one side of said camera bellows, and said camera bellows is installed on the said printed-wiring board (PWB); And main body, be fixed on said camera bellows, said sound equipment member and said printed-wiring board (PWB) between said main body and the said over cap; It is characterized in that; Said sound equipment member overlay configuration is one side at the back side of said camera bellows; The said sound equipment member portion of laying comprises: first flank is arranged on the back side one side of said over cap and the peripheral portion of contact and the nonoverlapping said sound equipment member of said camera bellows; Second flank is arranged on the bottom surface of said camera bellows, and the periphery of the overlapping said sound equipment member of encirclement and said camera bellows, highly for being connected to basically on the said printed-wiring board (PWB); Curved portions is arranged on the back side of said over cap, said curved portions along with the weir dike of the overlapping said dark box placing part of said sound equipment member; And be connected on the two ends of said first flank, wherein, the sound that produces from front one side of the said sound equipment member relative with said sound equipment hole; Sound to the outside from said sound equipment hole; And,, go into window through said plume and sound to the outside from the sound that front one side of the said sound equipment member relative with said camera bellows produces.

According to fire-alarm of the present invention; Through being configured in sound equipment member and camera bellows in the casing with the overlapping mode of a part; Thereby can reduce the diameter of casing; And utilize the acoustic pressure that first flank and second flank make the alarm song that sends from the sound equipment member can loss, and sound, so can send the alarm song of regulation acoustic pressure to the one side outside, front of fire-alarm.

Description of drawings

Fig. 1 is the vertical view of the state of expression mounting seat and the main body of pulling down fire-alarm of the present invention.

Fig. 2 is the cut-open view along the fire-alarm of the A-A direction of Fig. 1.

Fig. 3 is the vertical view of the over cap of fire-alarm.

Fig. 4 is the vertical view of camera bellows, printed-wiring board (PWB) and the loudspeaker of fire-alarm.

Fig. 5 is the vertical view of looking sideways from the main body one of fire-alarm.

Fig. 6 is the cut-open view along the B-B direction of Fig. 5.

The explanation of symbol figure mark

1 fire-alarm

2 camera bellows

3 dark box placing part

4 sound equipment holes

5 sound equipment members are laid portion

6 over caps

7 printed-wiring board (PWB)s

8 loudspeakers

9 plumes are gone into window

10 positioning ribs

11 peripheral portions

12 first flanks

13 second flanks

14 curved portions

15 sound equipment member supporting ribs

The 15a abutting part

16 main bodys

Embodiment

Utilize accompanying drawing that the preferred forms of fire-alarm of the present invention is described below.In this explanation below external, call the back side one side to a side that is installed on the ceiling etc., call a positive side to a side opposite with the back side one side.And, calling horizontal direction with parallel directions such as ceilings.

Fig. 1 is the vertical view of the state of expression mounting seat and the main body of pulling down fire-alarm of the present invention.Fig. 2 is the cut-open view along the fire-alarm of the A-A direction of Fig. 1.Fig. 3 is the vertical view of the over cap of fire-alarm.Fig. 4 is the vertical view of camera bellows, printed-wiring board (PWB) and the loudspeaker of fire-alarm.Fig. 5 is the vertical view of looking sideways from the main body one of fire-alarm.Fig. 6 is the cut-open view along the B-B direction of Fig. 5.

The profile of fire-alarm 1 of the present invention is circular and flows into cigarette from central authorities.Fire-alarm 1 of the present invention comprises: over cap 6; Have dark box placing part 3 and lay portion 5 with the sound equipment member; Said dark box placing part 3 in order to be enclosed in inside to camera bellows 2 at central part to a positive side-prominent one-tenth cylindrical shape, said sound equipment member is laid portion 5 and is had sound equipment hole 4 in the outside of the horizontal direction of dark box placing part 3; Camera bellows 2 is placed in the dark box placing part 3 of over cap 6; Printed-wiring board (PWB) 7 is configured in the back side one side of camera bellows 2; As the loudspeaker 8 of sound equipment member, be configured in the sound equipment member and lay in the portion 5; Main body 16 is configured in the back side one side of over cap 6 and clamping camera bellows 2, printed-wiring board (PWB) 7 and loudspeaker 8; Not shown mounting seat is configured in the back side one side of main body 16.In addition, be referred to as casing to over cap 6, main body 16 and mounting seat.

The monnolithic case of camera bellows 2 is cylindrical, detects the cigarette that gets into from the side.As shown in Figure 2 in addition, camera bellows 2 is installed on the printed-wiring board (PWB) 7, and its bottom surface and printed-wiring board (PWB) 7 be butt not, utilizes this structure, and sheet electric component (not shown) can be installed on the two sides of printed-wiring board (PWB) 7.

Be provided with plume in the cylindrical side of dark box placing part 3 and go into window 9, go into cigarette that window 9 flows into from plume and flow in the camera bellows 2 from the side of camera bellows 2.

With disc loudspeaker 8 in the zone of the over cap 6 relative with the bottom surface non-overlapping portions of dark box placing part 3, the sound equipment member is laid portion 5 and is had sound equipment hole 4.Lay portion 5 when having disposed loudspeaker 8 at the sound equipment member; Distance between the center of the center of loudspeaker 8 and dark box placing part 3 bottom surfaces is littler than the bottom surface radius sum of the radius of loudspeaker 8 and dark box placing part 3, and the shape that has the zone in sound equipment hole 4 is that the part back that the bottom surface through dark box placing part 3 cuts the circle of loudspeaker 8 forms.

Have in encirclement among the periphery in zone in sound equipment hole 4; With dark box placing part 3 nonoverlapping peripheries be circular arc; Arranged outside slightly in this periphery has circular arc positioning rib 10; Lay 5 last times of portion being configured in loudspeaker 8 the sound equipment member, laterally the moving of this circular arc positioning rib 10 limiting loudspeakers 8.Thereby, lay 5 last times of portion being configured in loudspeaker 8 the sound equipment member, if loudspeaker 8 is mobile a little in the plane, thereby then the periphery of loudspeaker 8 will contact positioning rib 10 and can prevent that loudspeaker 8 is moved further.

Be provided with circular arc first flank 12 with peripheral portion 11 butts of loudspeaker 8 in the inboard of this positioning rib 10.Thereby, lay 5 last times of portion being configured in loudspeaker 8 the sound equipment member, therefore the part of the peripheral portion 11 of the top contact loudspeaker 8 of first flank 12 can prevent that sound wave that loudspeaker 8 produces is from leaking between loudspeaker 8 and the positioning rib 10.

Lay 5 last times of portion being configured in loudspeaker 8 the sound equipment member, the peripheries that intersect with dark box placing part 3 that the sound equipment member is laid portion 5 are to the outstanding circular arc of the center position of loudspeaker 8.And curved portions 14 vertically is erected on this outstanding circular arc.Curved portions 14 has along dark box placing part 3 and the shape overlapping weir dike of loudspeaker 8, and is connected on the two ends of first flank 12.The top of aspect ratio first flank 12 at the top of this curved portions 14 is low, lays 5 last times of portion being configured in loudspeaker 8 the sound equipment member, can keep the gap between loudspeaker 8 and the curved portions 14.The part of the loudspeaker 8 relative with the top of curved portions 14 produces vibration, if loudspeaker 8 contacts with curved portions 14 then acoustic pressure can reduce.Yet owing to only keep gap slightly, sound is from being propagated to dark box placing part 3 by over cap 6 and the ante-chamber that first flank 12 surrounds, and after curved portions 14 reflects, returns ante-chamber and outwards propagates from sound equipment hole 4.

From the bottom surface of the back side one side of camera bellows 2, intersect on the circular arc of extensions with positioning rib 10 being placed in camera bellows 23 last times of dark box placing part, circular arc second flank 13 is set.The height of second flank 13 is for be connected on the printed-wiring board (PWB) 7 substantially.And radiate sound wave from the relative part in bottom surface with camera bellows 2 back sides one side of loudspeaker 8, this sound wave is in the reflection of second flank 13 and go into window 9 from the side of camera bellows 2 through plume and propagate to a positive side.

In addition, second flank 13 periphery that is configured to surround loudspeaker 8., also can be configured to peripheral portion 11 butts with loudspeaker 8 to second flank 13 here, but in this case, might be because the vibration of loudspeaker 8, cigarette detecting element (not shown) in the camera bellows 2 is waited and the solder sections of printed-wiring board (PWB) 7 is peeled off.

The side in the front of main body 16; Screw thread is fixing to be installed in 6 last times of over cap to main body 16 through adopting when as shown in Figure 5; The sound equipment member supporting rib 15 that is provided with as shown in Figure 6; The back side one side peripheral portion 11 of said sound equipment member supporting rib 15 contact loudspeakers 8, thus loudspeaker 8 clampings are remained between the said sound equipment member supporting rib 15 and first flank 12.Sound equipment member supporting rib 15 is diameter and the identical substantially general cylindrical shape of first flank 12, is connected on the peripheral portion 11 of loudspeaker 8 at a plurality of abutting part 15a of its front end setting.

See from the front, be configured in the casing overlappingly, thereby can reduce the diameter of casing through making a loudspeaker 8 and camera bellows 2 parts.The positioning rib 10 that utilization is arranged on the over cap 6 is located loudspeaker 8 with second flank 13 that is arranged on the camera bellows 2.

Sound from front one side sections of the loudspeaker 8 relative with sound equipment hole 4 produces owing to do not blocked and can propagate to horizontal direction by first flank 12, therefore can not spread at box house, and sound from the sound equipment hole 4 of straight ahead direction.In addition, from the alarm song that front one side sections of the loudspeaker 8 relative with camera bellows 2 produces,, sound to the outside of fire-alarm 1 owing to, therefore go into window 9 through plume from the side of camera bellows 2 by 13 reflections of second flank.

Through like this, owing to adopt first flank 12 and second flank 13 to make the acoustic pressure of the alarm song of loudspeaker 8 generations can loss, and sound to the outside of fire-alarm 1 a positive side, so can send the alarm song of regulation acoustic pressure.The alarm song that particularly produces from front one side sections of the loudspeaker 8 relative with camera bellows 2; Go into window 9 along the side of camera bellows 2 from plume and sound owing to utilize second flank 13; Thereby make the whole alarm songs that produce from loudspeaker 8 pass through over cap 6 along cardinal principle straight ahead direction; Sound to fire-alarm 1 outside, so can further reduce the acoustic pressure loss of alarm song.

The alarm song that produces from front one side sections of the loudspeaker 8 relative with sound equipment hole 4; Utilize curved portions 14 nearly all to sound from sound equipment hole 4; On the other hand, the alarm song from front one side sections of the loudspeaker 8 relative with camera bellows 2 produces also utilizes curved portions 14 nearly all to go into window 9 from plume and sounds; So alarm song is sounded through over cap 6, can further reduce the acoustic pressure loss of alarm song on the direction of cardinal principle straight ahead.

Because aspect ratio first flank 12 of curved portions 14 is low, thus even loudspeaker 8 produces vibration when sounding, the vibrating membrane that also can not make loudspeaker 8 contact with curved portions 14 and on casing the sound of generation dither.

Claims

1. fire-alarm; Comprise: over cap; Has dark box placing part and the sound equipment member is laid portion; Said dark box placing part protrudes tubular and has plume in the side of this dark box placing part to the fire-alarm front goes into window, and said sound equipment member is laid portion and formed the sound equipment hole in the said dark box placing part outside; Camera bellows is placed in the said dark box placing part; The sound equipment member is placed in said sound equipment member and lays in the portion; Printed-wiring board (PWB) be configured in the back side one side of said camera bellows, and said camera bellows is installed on the said printed-wiring board (PWB); And main body, be fixed on said camera bellows, said sound equipment member and said printed-wiring board (PWB) between said main body and the said over cap; It is characterized in that,

Said sound equipment member overlay configuration is one side at the back side of said camera bellows,

The said sound equipment member portion of laying comprises:

First flank is arranged on the back side one side of said over cap and the peripheral portion of contact and the nonoverlapping said sound equipment member of said camera bellows;

Second flank is arranged on the bottom surface of said camera bellows, and the periphery of the overlapping said sound equipment member of encirclement and said camera bellows, highly for being connected to basically on the said printed-wiring board (PWB); And

Curved portions is arranged on the back side of said over cap, said curved portions along with the weir dike of the overlapping said dark box placing part of said sound equipment member, and be connected on the two ends of said first flank, wherein,

The sound that produces from front one side of the said sound equipment member relative with said sound equipment hole; Sound to the outside from said sound equipment hole; And,, go into window through said plume and sound to the outside from the sound that front one side of the said sound equipment member relative with said camera bellows produces.

2. fire-alarm according to claim 1 is characterized in that, the height of said first flank of the aspect ratio of said curved portions is low.

3. fire-alarm according to claim 1 and 2; It is characterized in that; Said main body is provided with sound equipment member supporting rib; Said sound equipment member supporting ribbed joint touches the back side one side peripheral portion of said sound equipment member, thereby said sound equipment member clamping is remained between said sound equipment member supporting rib and said first flank.