CN101727724B - Fire alarm device - Google Patents

Fire alarm device Download PDF

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Publication number
CN101727724B
CN101727724B CN2009101636988A CN200910163698A CN101727724B CN 101727724 B CN101727724 B CN 101727724B CN 2009101636988 A CN2009101636988 A CN 2009101636988A CN 200910163698 A CN200910163698 A CN 200910163698A CN 101727724 B CN101727724 B CN 101727724B
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CN
China
Prior art keywords
fire
main body
mounting seat
lock nut
alarm
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Application number
CN2009101636988A
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Chinese (zh)
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CN101727724A (en
Inventor
冨田寿幸
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Nohmi Bosai Ltd
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Nohmi Bosai Ltd
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Publication of CN101727724A publication Critical patent/CN101727724A/en
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    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00Fire alarms; Alarms responsive to explosion
    • G08B17/06Electric actuation of the alarm, e.g. using a thermally-operated switch
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C37/00Control of fire-fighting equipment
    • A62C37/50Testing or indicating devices for determining the state of readiness of the equipment

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Fire Alarms (AREA)

Abstract

The present invention provides a fire alarm device which can prevent body falling-off caused by earthquake, etc. or stealing simply according to requirement. A fire alarm device body (2) is detachably equipped to an installation base (3) provided on a setting surface. A screw fixing structure in which a fixing screw (62) and a fixing nut (61) are used fixes the fire alarm device body (2) to the installation base. The fire alarm device (1) comprises the following components: two holding walls (43) which erects from a back plate (17) of the fire alarm device body and respectively cover two holding walls (43) that comprises two end faces of the side surface of the locking nut; a notch part (63) which is provided on the side plate of the installation base and includes the head part of the fixing screw; and a projection (44) which is set in an intersecting edge between the side surface and the end surface of the fixing nut and is next to the upper end of the edge of the holding wall that contacts with the edge of the side plate of the installation base.

Description

Fire-alarm
Technical field
The present invention relates to a kind ofly be installed in the fire-alarm on the mounting seat to the fire-alarm main body.
Background technology
This fire-alarm promptly is arranged on fire-alarm in only building building residence and is installed in freely on the mounting seat by the mounting seat that is installed in ceiling or wall portion, mounting or dismounting and waits the fire-alarm main body of detection of fires to constitute through surveying cigarette or heat.(for example opening the 2003-099871 communique) with reference to the patent documentation spy.
For this fire-alarm, utilize twist lock mechanism to install usually when on mounting seat, the fire-alarm main body being installed.Twist lock mechanism by the blade that for example is arranged on the fire-alarm main body back side, be arranged on the base and the sword seat portion of accepting the blade at the fire-alarm main body back side constitutes; Through carrying out the position adjustment of blade and sword seat portion, the fire-alarm main body is assemblied on the mounting seat, and makes blade be fastened on sword seat portion through reversing (relatively rotating); Through like this; The fire-alarm main body is fixed on the mounting seat, in addition, under the twistlock state through making the fire-alarm main body with respect to mounting seat; The edge is reversed with engaging of blade direction in the opposite direction, can remove the engaging of mounting seat and fire-alarm main body.
Yet, as stated, though with respect to mounting seat through reversing the fire-alarm main body, can carry out the engaging of fire-alarm main body simply or remove, need to consider because the fire-alarm main body that earthquake etc. cause comes off or artificially stolen etc.Therefore, expectation can prevent to come off or artificially stolen because of fire-alarm main body that earthquake etc. causes as required.
Summary of the invention
The purpose of this invention is to provide a kind of just can preventing simply as required comes off or artificially stolen fire-alarm because of the fire-alarm main body that earthquake etc. causes.
The present invention provides a kind of fire-alarm; The fire-alarm main body can be installed on the mounting seat that is arranged on the face of setting with installing and removing; And utilize the thread fixing structure of lock screw and lock nut that said fire-alarm main body is fixed on the said mounting seat; Said fire-alarm is characterised in that and comprises: two maintenance walls uprightly and respectively cover two end faces that comprise the side of said lock nut from the backplate of said fire-alarm main body; Notch, be arranged on be included on the side plate of said mounting seat and the head of said lock screw in; Protruding; Among the side that is arranged on said lock nut and the limit that end face intersects, near the upper end on the limit of the said maintenance wall that the limit contacted of the side plate of said mounting seat, among the side of said lock nut and limit that end face intersects, carried out chamfering on and the wall portion relative away from the said maintenance wall that the limit contacted of the side plate of said mounting seat with said convexity.
The effect of fire-alarm of the present invention is; Lock nut is with the lock screw screw thread fixedly the time; Though furthered to the outer circumferential side direction of fire-alarm main body; But owing to be provided with convexity in the wall portion upper end of the fire-alarm main body outer circumferential side direction that keeps wall, so not engaging and can be disengaged between lock nut and the convexity, idle running ground can not take place and be tightened with lock screw in lock nut.In addition, owing to keep the width height of the aspect ratio lock nut of all parts of wall, so be not easy to dally.
Description of drawings
Fig. 1 is the front view and the vertical view of the fire-alarm of best mode for carrying out the invention.
Fig. 2 is the stereographic map of the mounting seat of Fig. 1.
Fig. 3 is the stereographic map of the fire-alarm main body of Fig. 1.
Fig. 4 is backplate and the stereographic map of over cap of the fire-alarm main body of Fig. 3.
Fig. 5 is the amplification stereogram of stop member of the present invention and blade.
Fig. 6 is the cut-open view of a maintenance wall of the present invention.
Fig. 7 is that expression is inserted lock nut and inserted the figure of the screw thread stationary state of lock screw from the outside in keeping wall.
Fig. 8 is the stereographic map of the variation of expression mounting seat.
Description of reference numerals
1 fire-alarm, 2 fire-alarm main bodys, 3 mounting seat, 4 base plates
5 side plates, 6 ribs, 7 holes, 9 collet portions of 8 sword seat portions, 10 stopper portions
11 thinner wall section, 13 cigarette detection portions, 14 control panels, 15 loudspeakers
16 over caps, 17 backplates, 18 posts, 19 openings 20 surround wall
21 blades, 22 restriction ribs, 23 catch, 24 stop members, 25 catch support sectors
26 margining tablets 27 are laid plate 31 side plates in the battery portion 30
32 battery connectors 33 are transmitted and are reported to the police with connector 34,35 openings
36,37 guide protrusions, 38 holes, 39 lock nut maintaining parts, 40 retaining members
41 equipment nameplates, 42 notchs 43 keep wall 44 protruding 45 bottoms
46 otch, 47 semi-girders, 48 free ends, 49 stiffening rib, 50 guide parts
51 circular arc ellbeams, 52 dull and stereotyped ellbeams 53 are avoided portion's 54 restrictions
61 lock nut, 62 lock screw, 63 notchs
Embodiment
Fig. 1 is the front view and the vertical view of the fire-alarm of best mode for carrying out the invention.Fig. 2 is the stereographic map of the mounting seat of Fig. 1.Fig. 3 is the stereographic map of the fire-alarm main body of Fig. 1.Fig. 4 is backplate and the stereographic map of over cap of the fire-alarm main body of Fig. 3.Fig. 5 is the amplification stereogram of stop member of the present invention and blade.
And in explanation of the present invention, be that mounting seat 3 is installed in ceiling, with the vertical direction of ceiling as above-below direction, the ceiling side is described as the top.Therefore, fire-alarm main body 2 is rotated in the face parallel with ceiling.
As shown in Figure 1, the fire-alarm 1 of best mode for carrying out the invention comprises fire-alarm main body 2 and mounting seat 3.
Mounting seat 3 is installed with installation components such as screws in the installation position of the ceiling that fire-alarm 1 is installed etc.And as shown in Figure 2, mounting seat 3 is lower cylinders of height that the end is arranged, and comprises the base plate 4 and columnar side plate 5 of circular plate type.
On base plate 4, have the rib 6 with 5 one-tenth circular concentric of side plate, extend a roughly week and outstanding, have the hole 7 that to pass screw simultaneously in the inboard of side plate 5.And two places on rib 6 are provided with sword seat portion 8.
Sword seat portion 8 comprises: and base plate 4 between have specified gap plate shaped collet portion 9; Stopper portions 10; When rotating fire-alarm main body 2 along the direction of rotating fire-alarm main body 2 in order fire-alarm main body 2 to be installed on the mounting seat 3 (below be called installation direction) when aligning assigned position, be used to prevent fire-alarm main body 2 further to rotate.
On side plate 5; Be provided with the thinner wall section 11 of thinner thickness; When stolen when adopting lock screw and lock nut to fix with mounting seat 3 fire-alarm main body 2 in order to prevent; Thinner wall section 11 is converted into breach removes, then become the notch (notch 63 of Fig. 6, Fig. 7) in being included in the lock screw head.
Like Fig. 3 and shown in Figure 4, in fire-alarm main body 2, fixedly over cap 16 and backplate 17 are held through adopting screw as building blocks of functions such as the cigarette detection portion 13 of an example of detection portion, control panel 14, loudspeakers 15.
Over cap 16 truncated cone-shaped for being made up of base plate 16a and side plate 16b is provided with post 18 and surrounds wall 20, and said post 18 has and is used for and threaded hole that backplate 17 screws are fixed; Said encirclement wall 20 surrounds opening 19 in order to make the foreign matter that gets into from the opening 19 that is arranged on backplate 17 can not influence building blocks of function such as cigarette detection portion 13, control panel 14, loudspeaker 15 and with its sealing when backplate 17 is overlapped.
Surround two side wall portions that wall 20 comprises that the direction that begins to intersect to approximate vertical from side plate 16b extends, the madial wall portion that connects the tip side of two side wall portions.Surround wall 20 foreign matter such as screw being arranged when opening 19 gets into, can it be retained in the inboard that surrounds wall 20, prevent that its inside to over cap 16 from coming off.
Restriction rib 22 is arranged to one with encirclement wall 20.Restriction rib 22 is to be positioned at the part that extend to the direction of backplate 17 at the top of the side wall portion (installation direction one side) of the encirclement wall 20 under the blade 21 of backplate 17 when backplate 17 is overlapped.In the fire-alarm main body 2 that battery will be installed with respect to mounting seat 3 under the situation that installation direction rotates; Restriction rib 22 can make the collet portion 9 of catch 23 through sword seat portion 8 move at the direction opposite with the installation direction Shi Buhui that is pressed, and catch support sector 25 touches restriction rib 22 and can be not further do not move to the direction of blade 21.This restriction rib 22 is arranged in opening 19 outstanding.
In addition, margining tablet 26 is arranged to one with encirclement wall 20.Margining tablet 26 is wall portions that direction that the side wall portion (installation direction one side) from the encirclement wall 20 that restriction rib 22 is set intersects to approximate vertical is extended, thereby the side wall portion of the top ends of installation direction one side and encirclement wall 20 is connected with identical wall portion and is reinforced.Margining tablet 26 when backplate 17 is overlapped, be positioned at stop member 24 catch support sector 25 under, its top is towards installation direction, rear side is smooth, front side tilts.Battery is being installed in when laying battery portion 27, inclination is cut in order to avoid crushed element with the top of margining tablet 26 owing to make the front side step-down towards rotation direction (installation direction) inclination and distortion in catch support sector 25.
On the one hand, be not installed in when laying battery portion 27 at battery, when with the sword seat portion 8 of mounting seat 3 with catch 23 from directly over when depressing; Catch support sector 25 is owing to contact and can't depress with the flat portions at margining tablet 26 tops; Like this, when rotating fire-alarm main body 2, because catch 23 is stuck in the collet portion 9 of sword seat portion 8 of mounting seat 3 to installation direction; Can further not rotate, can prevent that the fire-alarm main body 2 that battery will be installed by mistake is installed on the mounting seat 3.
Backplate 17 comprises the middle plate 30 of circular plate type, the columnar side plate 31 that is connected with the periphery of middle plate 30.
Middle plate 30 is provided with: opening 34,35 can be connected with the corresponding connector of mounting seat 3 one sides and offer with connector 33 in order to make the battery connector 32 that is installed on the control panel 14 and to transmit to report to the police; Guide protrusions (being used to guide an example of stickup) 36,37 is used to guide the position of attaching apparatus nameplate 41; The hole 38 relative with the post with threaded hole of over cap 16 18; The lock nut maintaining part 39 that keeps lock nut 61; In over cap 16 1 sides with the recessed battery portion 27 of laying of semi-cylindrical shaped; Retaining member 40 keeps battery so that battery can not come off from the installation site battery being installed in when laying battery portion 27; Stop member 24, battery is installed in form when laying battery portion 27 avoid to not can with the catch 23 of collet portion 9 position contacting of the sword seat portion 8 of mounting seat 3.
Fire-alarm 1 has two kinds, to the forwarding warning type of outside device forwards alarm with do not transmit the warning type.Transmit the equipment of reporting to the police and the forwarding warning is installed on control panel 14 with connector 33.And the equipment nameplate 41 that sticks on the backplate 17 also has two kinds.Forwarding warning type among the present invention and do not transmit the warning type, varying in size of equipment nameplate 41 not only, and also the guide protrusions of when pasting, using 36,37 also is provided with two kinds.
The lock nut of the lock screw assembling that nut maintaining part 39 keeps inserting with the notch 42 that passes side plate 31 and to radially inner side.And nut the maintaining part 39 therefrom upright and section of plate 30 beginning is a コ shape, has a pair of maintenance wall 43 of two the relative end faces that cover lock nut respectively simultaneously.Keep the width of the height of wall 43 greater than the lock nut of using.In addition, can not come off easily, keep wall 43 to be provided with protruding 44 from the upper end of the wall portion of lock nut inserting side in order to make lock nut.
As shown in Figure 5; Stop member 24 comprises: semi-girder 47; Be utilized in and lay on the bottom 45 of semi-cylindrical shaped contacts side surfaces of battery of battery portion 27, two otch 46, one ends that are provided with along semicylindrical radial parallel are by 45 supports in the bottom of laying battery portion 27; From the free end of semi-girder 47 48 along the axially extended catch support sector 25 of laying battery portion 27; The 31 upright catch 23 from catch support sector 25 along side plate.Stiffening rib 49 is set on the catch 23.
Be not installed in when laying battery portion 27 at battery (below be called when battery is not installed), when fire-alarm main body 2 is installed in mounting seat 3 on the direction of rotating fire-alarm main body 2 (below be called installation direction.And when mounting seat 3 was taken off fire-alarm main body 2, the direction of rotating fire-alarm main body 2 is called took off direction.) catch 23 be positioned at blade 21 guide part 50 near, the top of catch 23 is positioned at the upside of the collet portion 9 of sword seat portion 8.
Semi-girder 47 comprises the dull and stereotyped ellbeam 52 that radius ratio is laid the little circular arc ellbeam 51 of the semi-cylindrical shaped radius of battery portion 27, extended from circular arc ellbeam 51.The opposite end of a end with being connected circular arc ellbeam 51 of this flat board ellbeam 52 is free ends 48.
And if batteries are installed laying battery portion 27, then because circular arc ellbeam 51 tilts to the direction near over cap 16, free end 48 descends and approaching to the medial surface of side plate 31 to the direction near over cap 16.At this moment, even free end 48 is approaching to the medial surface of side plate 31,, do not contact with side plate 31 so can produce distortion owing to be provided with the portion of avoiding 53 in the medial surface side of side plate 31 yet.
The medial surface of catch support sector 25 from the free end 48 of semi-girder 47 along side plate 31 extends to taking off direction.And approaching if the free end 48 of semi-girder 47 to descending near the direction of over cap 16, is deformed into to the medial surface of side plate 31 simultaneously, then the catch support sector 25 inclination and distortions position that becomes to be connected with semi-girder 47 descends at most, and opposition side decline is minimum.Therefore, catch 23 tilts downwards on installation direction, and is approaching to over cap 16 simultaneously.At this moment, the top of catch 23 is lower than the collet portion 9 of sword seat portion 8.Therefore; If fire-alarm main body 2 being pressed to mounting seat 3 on one side rotates to installation direction on one side; Then since the collet portion 9 of sword seat portion 8 pass between the guide part 50 of top and blade 21 of catch 23; Embed the guide part 50 of blade 21, fall downwards from mounting seat 3 so can prevent fire-alarm main body 2.
Though the top of catch 23 is smooth from the top of installation direction to central authorities, have that to begin step-down from central authorities be minimum chamfering to the terminal.Like this, when mounting seat 3 is taken off fire-alarm main body 2, because the gap between the collet portion 9 of the top of catch 23 and sword seat portion 8 is very wide, so can begin to rotate reposefully.
Be the blade that is positioned at diagonal position 21 at center, when stop member 24 is out of shape, side plate is dug the thin portion that avoids 53 that forms, pass the notch 42 of the lock screw of preventing 2 rotations of fire-alarm main body from the inboard at the center of setting on the side plate 31 in order not hinder it to move with middle plate 30.
Blade 21 comprises: guide part 50, among the top of the side plate 31 of mounting seat 3, extend with specific thickness from the top of specified length to the inside; Restrictions 54 when rotating fire-alarm main body 2 to installation direction, limits fire-alarm main body 2 with collet portion 9 butts of sword seat portion 8 and further rotates.
State when then, explanation fire-alarm main body 2 that battery will be installed is installed in mounting seat 3.
Because when battery is not installed; The semi-girder 47 to stop member 24 does not apply power; So the top of catch 23 is positioned at the upside of collet portion 9 of the sword seat portion 8 of mounting seat 3, if rotate fire-alarm main body 2 to installation direction, then the side end face of catch 23 contacts with collet portion 9.Therefore, fire-alarm main body 2 can not further be rotated to installation direction, so fire-alarm main body 2 can not be installed on mounting seat 3.
Then, explanation fire-alarm main body 2 that battery will be installed is installed in the mounting seat state in 3 last times.
If battery is installed in the battery portion 27 of laying, then apply power towards over cap 16 directions to semi-girder 47, the free end 48 of semi-girder 47 descends to the direction near over cap 16, and is deformed into to the medial surface of side plate 31 approaching.Like this, the position that catch support sector 25 inclination and distortions become to be connected with semi-girder 47 descends at most, and opposition side descends minimum.Therefore, catch 23 is downward-sloping on installation direction, simultaneously near over cap 16.At this moment; Because the position at the top of catch 23 is in the downside of the collet portion 9 of sword seat portion 8; So the collet portion 9 of sword seat portion 8 is passed on the top of catch 23, embed the guide part 50 of blade 21, thereby can fire-alarm main body 2 be installed on the mounting seat 3.
The battery-locking mechanism of fire-alarm of the present invention; Locking is not installed fire-alarm main body 2 can not be installed on the mounting seat 3 when battery is installed; Because it is by with the integrally formed sword seat portion 8 of mounting seat 3, constitute with the backplate 17 integrally formed blade 21 and the stop members 24 of fire-alarm main body 2; So do not need the parts of independent battery-locking mechanism, do not need the assembly operation of battery-locking mechanism yet.
In addition; The bottom of the catch 23 that the collet portion 9 that utilizes sword seat portion 8 is pressed to the direction opposite with installation direction; The encirclement wall 20 all-in-one-pieces restriction rib 22 with over cap 16 is arranged in utilization; Be limited to rightabout mobile with installation direction, so, can prevent that catch 23 is not ruptured because of pushing to the direction opposite with installation direction when battery is installed.
In addition; The catch 23 that utilizes the collet portion 9 of sword seat portion 8 to be pushed downwards; Owing to utilize flat with encirclement wall 20 all-in-one-piece margining tablets 26 tops of the over cap 16 of setting under it; Limit it and move downwards, avoid to over cap 16 1 sides, can prevent that the fire-alarm main body 2 that battery will be installed by mistake is installed on the mounting seat 3 so can prevent stop tab 23.
In addition; Suppose because design error etc.; The fire-alarm main body 2 of battery can will be installed rotate to installation direction by force, blade 21 is embedded under the situation of sword seat portion 8, catch 23 width towards the upper end time is narrowed down gradually owing to carried out chamfering in blade 21 1 sides; So, can easily it be taken off from mounting seat 3 through rotating fire-alarm main body 2 to taking off direction.
Fig. 6 is the cut-open view of a maintenance wall of the present invention.Thereby Fig. 7 representes in the maintenance wall, to insert lock nut and insert lock screw from the outside and carry out the figure that screw thread is fixed.
As Fig. 6, Fig. 7 in detail shown in, lock nut maintaining part 39 plate 30 beginnings from backplate 17 are upright, comprise two maintenance walls 43 that relative two end faces that cover lock nut 61 and section roughly become コ shape.And, keep wall 43 not only to cover the end face of lock nut 61, also cover a part through two continuous sides of limit.
In addition, it is protruding 44 to keep wall 43 to be provided with, and when inserting lock nut 61, said protruding 44 stride across the upper end of the limit residing wall portion of end face in the side from side plate 31 of lock nut 61, outstanding to the inside.In a word, keep the convexity 44 of wall 43 to be set in place in the upper end of the wall portion of the outer circumferential side of fire-alarm main body 2.
And lock nut 61 is inserted between two maintenance walls 43 from the top.And chamfering is carried out in the upper end towards the wall portion of lock nut 61 and sides side plate 31 opposite sides, and tilt a little can be easily to keeping inserting lock nut 61 between the wall 43 through making.
In addition, when lock screw 62 is screwed into lock nut 61, the wall portion butt of the maintenance wall 43 of lock nut 61 and side plate 31 1 sides.Even, to top lift lock nut 61 can from maintenance wall 43 between not come off because the end face towards the top pierces protruding 44 downside this moment yet.
Then explanation can not fall and be not easy to have things stolen when the earthquake in order to make fire-alarm main body 2, utilizes lock screw 62 and lock nut 61 that fire-alarm main body 2 is fixed on the mounting seat 3.
Fixedly the time, the instruments such as thinner wall section 11 usefulness pliers with mounting seat 3 are converted into breach in advance, form notch 63 and are installed in the installation site afterwards.
Then, between the maintenance wall 43 of the lock nut maintaining part 39 of fire-alarm main body 2, insert lock nut 61.The fire-alarm main body 2 that then, battery will be installed as said is installed on the mounting seat 3.
Then, insert lock screw 62 from the notch 63 of mounting seat 3, the notch 42 of backplate 17, and the lock nut of inserting between the maintenance wall 43 61 is tightened.Through like this, utilize notch 42 to prevent the head 62a of lock screw 62.Its result; The head 62a of lock screw 62 is enclosed in the notch 63 of mounting seat 3, even rotate fire-alarm main body 2 to taking off direction, because of the head 62a of lock screw 62 contacts with mounting seat 3; Can not rotate fire-alarm main body 2, so can prevent to have things stolen.
In addition, even because earthquake causes 2 vibrations of fire-alarm main body, owing to utilize lock screw 62 and lock nut 61 to be fixed on the mounting seat 3, so can prevent to come off to fall down.
Fire-alarm 1 of the present invention can be installed in fire-alarm main body 2 on the mounting seat 3 that is arranged on the face of setting with installing and removing; And adopt the thread fixing structure of lock screw 62 and lock nut 61 that fire-alarm main body 2 is fixed on the said mounting seat 3; Said fire-alarm 1 comprises: two maintenance walls 43 uprightly and respectively cover two end faces of the side that comprises said lock nut 61 from the backplate 17 of said fire-alarm main body 2; Notch 63, be arranged on be included on the side plate 31 of said mounting seat 3 and the head 62a of said lock screw 62 in; Protruding 44, among the crossing limit of the side that is arranged on said lock nut 61 and end face, near the upper end on the limit of the said maintenance wall 43 that the limit contacted of the side plate 31 of said mounting seat 3.Like this, owing to keep wall 43 that convexity 44 is set in the upper end of the wall portion of the outer circumferential side that is positioned at fire-alarm main body 2, so utilize lock screw 62 to tighten even can prevent lock nut 61, lock nut 61 also can be from the situation that keeps wall 43 to come off.
In addition, the height of said maintenance wall 43 surpasses the width of said lock nut 61.In lock nut maintaining part 39; The maintenance wall 43 of the コ shape that utilization is higher than the width of lock nut 61 keep two end faces of lock nut 61, and downward end face contacts with backplate 17; So when lock screw 62 and lock nut 61 are tightened; Also can keep lock nut 61 even apply the power of twist-lock nut 61, can prevent the rotation of lock nut 61, can not dally through keeping wall 43.
In addition; In said embodiment, form notch 63 though utilize instruments such as pliers that the thinner wall section 11 of mounting seat 3 is converted into breach, as shown in Figure 8; Through the switch-in part 11a that can remove is set on thinner wall section 11, can make thinner wall section 11 be converted into otch easily.In addition, can on mounting seat 3, form notch 63 in advance.

Claims (2)

1. fire-alarm; The fire-alarm main body can be installed on the mounting seat that is arranged on the face of setting with installing and removing; And utilize the thread fixing structure of lock screw and lock nut that said fire-alarm main body is fixed on the said mounting seat, said fire-alarm is characterised in that and comprises:
Two maintenance walls uprightly and respectively cover two end faces that comprise the side of said lock nut from the backplate of said fire-alarm main body;
Notch, be arranged on wrap on the side plate of said mounting seat and the head of said lock screw in;
Among the convexity, the side that is arranged on said lock nut and limit that end face intersects, near the upper end on the limit of the said maintenance wall that the limit contacted of the side plate of said mounting seat,
Among the side of said lock nut and limit that end face intersects, carried out chamfering relatively and on the wall portion away from the said maintenance wall that the limit contacted of the side plate of said mounting seat with said convexity.
2. fire-alarm according to claim 1 is characterized in that, the height of said maintenance wall surpasses the width of said lock nut.
CN2009101636988A 2008-10-22 2009-08-13 Fire alarm device Active CN101727724B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008271692A JP4828591B2 (en) 2008-10-22 2008-10-22 Fire alarm
JP2008-271692 2008-10-22

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Publication Number Publication Date
CN101727724A CN101727724A (en) 2010-06-09
CN101727724B true CN101727724B (en) 2012-07-25

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KR (1) KR20100044689A (en)
CN (1) CN101727724B (en)
TW (1) TWI474289B (en)

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Title
JP昭61-167710A 1986.07.29
JP特开平9-035158A 1997.02.07

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JP2010102417A (en) 2010-05-06
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JP4828591B2 (en) 2011-11-30
TW201025204A (en) 2010-07-01
KR20100044689A (en) 2010-04-30

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